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(eht_oper, true, true, &ap_chandef); 114 ap_center_freq = ap_chandef.center_freq1; 115 ap_bw = 20 * BIT(u8_get_bits(info->control, 116 IEEE80211_EHT_OPER_CHAN_WIDTH)); 117 ap_start_freq = ap_center_freq - ap_bw / 2; 118 local_center_freq = chandef->center_freq1; 119 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 120 local_start_freq = local_center_freq - local_bw / 2; 121 shift = (local_start_freq - ap_start_freq) / 20; 122 mask = BIT(local_bw / 20) - 1; 123 124 return (bitmap >> shift) & mask; 125 } 126 127 /* 128 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 129 * valid bitmap. 130 */ 131 static void 132 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 133 const struct ieee80211_eht_operation *eht_oper, 134 u16 bitmap, u64 *changed) 135 { 136 struct cfg80211_chan_def *chandef = &link->conf->chandef; 137 u16 extracted; 138 u64 _changed = 0; 139 140 if (!changed) 141 changed = &_changed; 142 143 while (chandef->width > NL80211_CHAN_WIDTH_40) { 144 extracted = 145 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 146 bitmap); 147 148 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 149 chandef)) 150 break; 151 link->u.mgd.conn_flags |= 152 ieee80211_chandef_downgrade(chandef); 153 *changed |= BSS_CHANGED_BANDWIDTH; 154 } 155 156 if (chandef->width <= NL80211_CHAN_WIDTH_40) 157 extracted = 0; 158 159 if (link->conf->eht_puncturing != extracted) { 160 link->conf->eht_puncturing = extracted; 161 *changed |= BSS_CHANGED_EHT_PUNCTURING; 162 } 163 } 164 165 /* 166 * We can have multiple work items (and connection probing) 167 * scheduling this timer, but we need to take care to only 168 * reschedule it when it should fire _earlier_ than it was 169 * asked for before, or if it's not pending right now. This 170 * function ensures that. Note that it then is required to 171 * run this function for all timeouts after the first one 172 * has happened -- the work that runs from this timer will 173 * do that. 174 */ 175 static void run_again(struct ieee80211_sub_if_data *sdata, 176 unsigned long timeout) 177 { 178 sdata_assert_lock(sdata); 179 180 if (!timer_pending(&sdata->u.mgd.timer) || 181 time_before(timeout, sdata->u.mgd.timer.expires)) 182 mod_timer(&sdata->u.mgd.timer, timeout); 183 } 184 185 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 186 { 187 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 188 return; 189 190 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 191 return; 192 193 mod_timer(&sdata->u.mgd.bcn_mon_timer, 194 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 195 } 196 197 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 198 { 199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 200 201 if (unlikely(!ifmgd->associated)) 202 return; 203 204 if (ifmgd->probe_send_count) 205 ifmgd->probe_send_count = 0; 206 207 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 208 return; 209 210 mod_timer(&ifmgd->conn_mon_timer, 211 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 212 } 213 214 static int ecw2cw(int ecw) 215 { 216 return (1 << ecw) - 1; 217 } 218 219 static ieee80211_conn_flags_t 220 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 221 struct ieee80211_link_data *link, 222 ieee80211_conn_flags_t conn_flags, 223 struct ieee80211_supported_band *sband, 224 struct ieee80211_channel *channel, 225 u32 vht_cap_info, 226 const struct ieee80211_ht_operation *ht_oper, 227 const struct ieee80211_vht_operation *vht_oper, 228 const struct ieee80211_he_operation *he_oper, 229 const struct ieee80211_eht_operation *eht_oper, 230 const struct ieee80211_s1g_oper_ie *s1g_oper, 231 struct cfg80211_chan_def *chandef, bool tracking) 232 { 233 struct cfg80211_chan_def vht_chandef; 234 struct ieee80211_sta_ht_cap sta_ht_cap; 235 ieee80211_conn_flags_t ret; 236 u32 ht_cfreq; 237 238 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 239 chandef->chan = channel; 240 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 241 chandef->center_freq1 = channel->center_freq; 242 chandef->freq1_offset = channel->freq_offset; 243 244 if (channel->band == NL80211_BAND_6GHZ) { 245 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 246 chandef)) { 247 mlme_dbg(sdata, 248 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 249 ret = IEEE80211_CONN_DISABLE_HT | 250 IEEE80211_CONN_DISABLE_VHT | 251 IEEE80211_CONN_DISABLE_HE | 252 IEEE80211_CONN_DISABLE_EHT; 253 } else { 254 ret = 0; 255 } 256 vht_chandef = *chandef; 257 goto out; 258 } else if (sband->band == NL80211_BAND_S1GHZ) { 259 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 260 sdata_info(sdata, 261 "Missing S1G Operation Element? Trying operating == primary\n"); 262 chandef->width = ieee80211_s1g_channel_width(channel); 263 } 264 265 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 266 IEEE80211_CONN_DISABLE_VHT | 267 IEEE80211_CONN_DISABLE_80P80MHZ | 268 IEEE80211_CONN_DISABLE_160MHZ; 269 goto out; 270 } 271 272 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 273 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 274 275 if (!ht_oper || !sta_ht_cap.ht_supported) { 276 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 277 ret = IEEE80211_CONN_DISABLE_HT | 278 IEEE80211_CONN_DISABLE_VHT | 279 IEEE80211_CONN_DISABLE_HE | 280 IEEE80211_CONN_DISABLE_EHT; 281 goto out; 282 } 283 284 chandef->width = NL80211_CHAN_WIDTH_20; 285 286 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 287 channel->band); 288 /* check that channel matches the right operating channel */ 289 if (!tracking && channel->center_freq != ht_cfreq) { 290 /* 291 * It's possible that some APs are confused here; 292 * Netgear WNDR3700 sometimes reports 4 higher than 293 * the actual channel in association responses, but 294 * since we look at probe response/beacon data here 295 * it should be OK. 296 */ 297 sdata_info(sdata, 298 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 299 channel->center_freq, ht_cfreq, 300 ht_oper->primary_chan, channel->band); 301 ret = IEEE80211_CONN_DISABLE_HT | 302 IEEE80211_CONN_DISABLE_VHT | 303 IEEE80211_CONN_DISABLE_HE | 304 IEEE80211_CONN_DISABLE_EHT; 305 goto out; 306 } 307 308 /* check 40 MHz support, if we have it */ 309 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 310 ieee80211_chandef_ht_oper(ht_oper, chandef); 311 } else { 312 mlme_dbg(sdata, "40 MHz not supported\n"); 313 /* 40 MHz (and 80 MHz) must be supported for VHT */ 314 ret = IEEE80211_CONN_DISABLE_VHT; 315 /* also mark 40 MHz disabled */ 316 ret |= IEEE80211_CONN_DISABLE_40MHZ; 317 goto out; 318 } 319 320 if (!vht_oper || !sband->vht_cap.vht_supported) { 321 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 322 ret = IEEE80211_CONN_DISABLE_VHT; 323 goto out; 324 } 325 326 vht_chandef = *chandef; 327 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 328 he_oper && 329 (le32_to_cpu(he_oper->he_oper_params) & 330 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 331 struct ieee80211_vht_operation he_oper_vht_cap; 332 333 /* 334 * Set only first 3 bytes (other 2 aren't used in 335 * ieee80211_chandef_vht_oper() anyway) 336 */ 337 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 338 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 339 340 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 341 &he_oper_vht_cap, ht_oper, 342 &vht_chandef)) { 343 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 344 sdata_info(sdata, 345 "HE AP VHT information is invalid, disabling HE\n"); 346 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 347 goto out; 348 } 349 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 350 vht_cap_info, 351 vht_oper, ht_oper, 352 &vht_chandef)) { 353 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 354 sdata_info(sdata, 355 "AP VHT information is invalid, disabling VHT\n"); 356 ret = IEEE80211_CONN_DISABLE_VHT; 357 goto out; 358 } 359 360 if (!cfg80211_chandef_valid(&vht_chandef)) { 361 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 362 sdata_info(sdata, 363 "AP VHT information is invalid, disabling VHT\n"); 364 ret = IEEE80211_CONN_DISABLE_VHT; 365 goto out; 366 } 367 368 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 369 ret = 0; 370 goto out; 371 } 372 373 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 374 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 375 sdata_info(sdata, 376 "AP VHT information doesn't match HT, disabling VHT\n"); 377 ret = IEEE80211_CONN_DISABLE_VHT; 378 goto out; 379 } 380 381 *chandef = vht_chandef; 382 383 /* 384 * handle the case that the EHT operation indicates that it holds EHT 385 * operation information (in case that the channel width differs from 386 * the channel width reported in HT/VHT/HE). 387 */ 388 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 389 struct cfg80211_chan_def eht_chandef = *chandef; 390 391 ieee80211_chandef_eht_oper(eht_oper, 392 eht_chandef.width == 393 NL80211_CHAN_WIDTH_160, 394 false, &eht_chandef); 395 396 if (!cfg80211_chandef_valid(&eht_chandef)) { 397 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 398 sdata_info(sdata, 399 "AP EHT information is invalid, disabling EHT\n"); 400 ret = IEEE80211_CONN_DISABLE_EHT; 401 goto out; 402 } 403 404 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 405 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 406 sdata_info(sdata, 407 "AP EHT information is incompatible, disabling EHT\n"); 408 ret = IEEE80211_CONN_DISABLE_EHT; 409 goto out; 410 } 411 412 *chandef = eht_chandef; 413 } 414 415 ret = 0; 416 417 out: 418 /* 419 * When tracking the current AP, don't do any further checks if the 420 * new chandef is identical to the one we're currently using for the 421 * connection. This keeps us from playing ping-pong with regulatory, 422 * without it the following can happen (for example): 423 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 424 * - AP advertises regdom US 425 * - CRDA loads regdom US with 80 MHz prohibited (old database) 426 * - the code below detects an unsupported channel, downgrades, and 427 * we disconnect from the AP in the caller 428 * - disconnect causes CRDA to reload world regdomain and the game 429 * starts anew. 430 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 431 * 432 * It seems possible that there are still scenarios with CSA or real 433 * bandwidth changes where a this could happen, but those cases are 434 * less common and wouldn't completely prevent using the AP. 435 */ 436 if (tracking && 437 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 438 return ret; 439 440 /* don't print the message below for VHT mismatch if VHT is disabled */ 441 if (ret & IEEE80211_CONN_DISABLE_VHT) 442 vht_chandef = *chandef; 443 444 /* 445 * Ignore the DISABLED flag when we're already connected and only 446 * tracking the APs beacon for bandwidth changes - otherwise we 447 * might get disconnected here if we connect to an AP, update our 448 * regulatory information based on the AP's country IE and the 449 * information we have is wrong/outdated and disables the channel 450 * that we're actually using for the connection to the AP. 451 */ 452 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 453 tracking ? 0 : 454 IEEE80211_CHAN_DISABLED)) { 455 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 456 ret = IEEE80211_CONN_DISABLE_HT | 457 IEEE80211_CONN_DISABLE_VHT | 458 IEEE80211_CONN_DISABLE_HE | 459 IEEE80211_CONN_DISABLE_EHT; 460 break; 461 } 462 463 ret |= ieee80211_chandef_downgrade(chandef); 464 } 465 466 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 467 IEEE80211_CHAN_NO_HE)) 468 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 469 470 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 471 IEEE80211_CHAN_NO_EHT)) 472 ret |= IEEE80211_CONN_DISABLE_EHT; 473 474 if (chandef->width != vht_chandef.width && !tracking) 475 sdata_info(sdata, 476 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 477 478 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 479 return ret; 480 } 481 482 static int ieee80211_config_bw(struct ieee80211_link_data *link, 483 const struct ieee80211_ht_cap *ht_cap, 484 const struct ieee80211_vht_cap *vht_cap, 485 const struct ieee80211_ht_operation *ht_oper, 486 const struct ieee80211_vht_operation *vht_oper, 487 const struct ieee80211_he_operation *he_oper, 488 const struct ieee80211_eht_operation *eht_oper, 489 const struct ieee80211_s1g_oper_ie *s1g_oper, 490 const u8 *bssid, u64 *changed) 491 { 492 struct ieee80211_sub_if_data *sdata = link->sdata; 493 struct ieee80211_local *local = sdata->local; 494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 495 struct ieee80211_channel *chan = link->conf->chandef.chan; 496 struct ieee80211_supported_band *sband = 497 local->hw.wiphy->bands[chan->band]; 498 struct cfg80211_chan_def chandef; 499 u16 ht_opmode; 500 ieee80211_conn_flags_t flags; 501 u32 vht_cap_info = 0; 502 int ret; 503 504 /* if HT was/is disabled, don't track any bandwidth changes */ 505 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 506 return 0; 507 508 /* don't check VHT if we associated as non-VHT station */ 509 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 510 vht_oper = NULL; 511 512 /* don't check HE if we associated as non-HE station */ 513 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 514 !ieee80211_get_he_iftype_cap(sband, 515 ieee80211_vif_type_p2p(&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(sband, 523 ieee80211_vif_type_p2p(&sdata->vif))) 524 eht_oper = NULL; 525 526 /* 527 * if bss configuration changed store the new one - 528 * this may be applicable even if channel is identical 529 */ 530 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 531 if (link->conf->ht_operation_mode != ht_opmode) { 532 *changed |= BSS_CHANGED_HT; 533 link->conf->ht_operation_mode = ht_opmode; 534 } 535 536 if (vht_cap) 537 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 538 539 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 540 flags = ieee80211_determine_chantype(sdata, link, 541 link->u.mgd.conn_flags, 542 sband, chan, vht_cap_info, 543 ht_oper, vht_oper, 544 he_oper, eht_oper, 545 s1g_oper, &chandef, true); 546 547 /* 548 * Downgrade the new channel if we associated with restricted 549 * capabilities. For example, if we associated as a 20 MHz STA 550 * to a 40 MHz AP (due to regulatory, capabilities or config 551 * reasons) then switching to a 40 MHz channel now won't do us 552 * any good -- we couldn't use it with the AP. 553 */ 554 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 555 chandef.width == NL80211_CHAN_WIDTH_80P80) 556 flags |= ieee80211_chandef_downgrade(&chandef); 557 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 558 chandef.width == NL80211_CHAN_WIDTH_160) 559 flags |= ieee80211_chandef_downgrade(&chandef); 560 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 561 chandef.width > NL80211_CHAN_WIDTH_20) 562 flags |= ieee80211_chandef_downgrade(&chandef); 563 564 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 565 return 0; 566 567 link_info(link, 568 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 569 link->u.mgd.bssid, chandef.chan->center_freq, 570 chandef.chan->freq_offset, chandef.width, 571 chandef.center_freq1, chandef.freq1_offset, 572 chandef.center_freq2); 573 574 if (flags != (link->u.mgd.conn_flags & 575 (IEEE80211_CONN_DISABLE_HT | 576 IEEE80211_CONN_DISABLE_VHT | 577 IEEE80211_CONN_DISABLE_HE | 578 IEEE80211_CONN_DISABLE_EHT | 579 IEEE80211_CONN_DISABLE_40MHZ | 580 IEEE80211_CONN_DISABLE_80P80MHZ | 581 IEEE80211_CONN_DISABLE_160MHZ | 582 IEEE80211_CONN_DISABLE_320MHZ)) || 583 !cfg80211_chandef_valid(&chandef)) { 584 sdata_info(sdata, 585 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 586 link->u.mgd.bssid, flags, ifmgd->flags); 587 return -EINVAL; 588 } 589 590 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 591 592 if (ret) { 593 sdata_info(sdata, 594 "AP %pM changed bandwidth to incompatible one - disconnect\n", 595 link->u.mgd.bssid); 596 return ret; 597 } 598 599 return 0; 600 } 601 602 /* frame sending functions */ 603 604 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 605 struct sk_buff *skb, u8 ap_ht_param, 606 struct ieee80211_supported_band *sband, 607 struct ieee80211_channel *channel, 608 enum ieee80211_smps_mode smps, 609 ieee80211_conn_flags_t conn_flags) 610 { 611 u8 *pos; 612 u32 flags = channel->flags; 613 u16 cap; 614 struct ieee80211_sta_ht_cap ht_cap; 615 616 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 617 618 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 619 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 620 621 /* determine capability flags */ 622 cap = ht_cap.cap; 623 624 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 625 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 626 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 627 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 628 cap &= ~IEEE80211_HT_CAP_SGI_40; 629 } 630 break; 631 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 632 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 633 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 634 cap &= ~IEEE80211_HT_CAP_SGI_40; 635 } 636 break; 637 } 638 639 /* 640 * If 40 MHz was disabled associate as though we weren't 641 * capable of 40 MHz -- some broken APs will never fall 642 * back to trying to transmit in 20 MHz. 643 */ 644 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 645 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 646 cap &= ~IEEE80211_HT_CAP_SGI_40; 647 } 648 649 /* set SM PS mode properly */ 650 cap &= ~IEEE80211_HT_CAP_SM_PS; 651 switch (smps) { 652 case IEEE80211_SMPS_AUTOMATIC: 653 case IEEE80211_SMPS_NUM_MODES: 654 WARN_ON(1); 655 fallthrough; 656 case IEEE80211_SMPS_OFF: 657 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 658 IEEE80211_HT_CAP_SM_PS_SHIFT; 659 break; 660 case IEEE80211_SMPS_STATIC: 661 cap |= WLAN_HT_CAP_SM_PS_STATIC << 662 IEEE80211_HT_CAP_SM_PS_SHIFT; 663 break; 664 case IEEE80211_SMPS_DYNAMIC: 665 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 666 IEEE80211_HT_CAP_SM_PS_SHIFT; 667 break; 668 } 669 670 /* reserve and fill IE */ 671 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 672 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 673 } 674 675 /* This function determines vht capability flags for the association 676 * and builds the IE. 677 * Note - the function returns true to own the MU-MIMO capability 678 */ 679 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 680 struct sk_buff *skb, 681 struct ieee80211_supported_band *sband, 682 struct ieee80211_vht_cap *ap_vht_cap, 683 ieee80211_conn_flags_t conn_flags) 684 { 685 struct ieee80211_local *local = sdata->local; 686 u8 *pos; 687 u32 cap; 688 struct ieee80211_sta_vht_cap vht_cap; 689 u32 mask, ap_bf_sts, our_bf_sts; 690 bool mu_mimo_owner = false; 691 692 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 693 694 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 695 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 696 697 /* determine capability flags */ 698 cap = vht_cap.cap; 699 700 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 701 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 702 703 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 704 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 705 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 706 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 707 } 708 709 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 710 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 711 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 712 } 713 714 /* 715 * Some APs apparently get confused if our capabilities are better 716 * than theirs, so restrict what we advertise in the assoc request. 717 */ 718 if (!(ap_vht_cap->vht_cap_info & 719 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 720 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 721 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 722 else if (!(ap_vht_cap->vht_cap_info & 723 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 724 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 725 726 /* 727 * If some other vif is using the MU-MIMO capability we cannot associate 728 * using MU-MIMO - this will lead to contradictions in the group-id 729 * mechanism. 730 * Ownership is defined since association request, in order to avoid 731 * simultaneous associations with MU-MIMO. 732 */ 733 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 734 bool disable_mu_mimo = false; 735 struct ieee80211_sub_if_data *other; 736 737 list_for_each_entry_rcu(other, &local->interfaces, list) { 738 if (other->vif.bss_conf.mu_mimo_owner) { 739 disable_mu_mimo = true; 740 break; 741 } 742 } 743 if (disable_mu_mimo) 744 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 745 else 746 mu_mimo_owner = true; 747 } 748 749 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 750 751 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 752 our_bf_sts = cap & mask; 753 754 if (ap_bf_sts < our_bf_sts) { 755 cap &= ~mask; 756 cap |= ap_bf_sts; 757 } 758 759 /* reserve and fill IE */ 760 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 761 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 762 763 return mu_mimo_owner; 764 } 765 766 /* This function determines HE capability flags for the association 767 * and builds the IE. 768 */ 769 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 770 struct sk_buff *skb, 771 struct ieee80211_supported_band *sband, 772 enum ieee80211_smps_mode smps_mode, 773 ieee80211_conn_flags_t conn_flags) 774 { 775 u8 *pos, *pre_he_pos; 776 const struct ieee80211_sta_he_cap *he_cap; 777 u8 he_cap_size; 778 779 he_cap = ieee80211_get_he_iftype_cap(sband, 780 ieee80211_vif_type_p2p(&sdata->vif)); 781 if (WARN_ON(!he_cap)) 782 return; 783 784 /* get a max size estimate */ 785 he_cap_size = 786 2 + 1 + sizeof(he_cap->he_cap_elem) + 787 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 788 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 789 he_cap->he_cap_elem.phy_cap_info); 790 pos = skb_put(skb, he_cap_size); 791 pre_he_pos = pos; 792 pos = ieee80211_ie_build_he_cap(conn_flags, 793 pos, he_cap, pos + he_cap_size); 794 /* trim excess if any */ 795 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 796 797 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 798 } 799 800 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 801 struct sk_buff *skb, 802 struct ieee80211_supported_band *sband) 803 { 804 u8 *pos; 805 const struct ieee80211_sta_he_cap *he_cap; 806 const struct ieee80211_sta_eht_cap *eht_cap; 807 u8 eht_cap_size; 808 809 he_cap = ieee80211_get_he_iftype_cap(sband, 810 ieee80211_vif_type_p2p(&sdata->vif)); 811 eht_cap = ieee80211_get_eht_iftype_cap(sband, 812 ieee80211_vif_type_p2p(&sdata->vif)); 813 814 /* 815 * EHT capabilities element is only added if the HE capabilities element 816 * was added so assume that 'he_cap' is valid and don't check it. 817 */ 818 if (WARN_ON(!he_cap || !eht_cap)) 819 return; 820 821 eht_cap_size = 822 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 823 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 824 &eht_cap->eht_cap_elem, 825 false) + 826 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 827 eht_cap->eht_cap_elem.phy_cap_info); 828 pos = skb_put(skb, eht_cap_size); 829 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 830 false); 831 } 832 833 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 834 enum nl80211_chan_width width, 835 struct ieee80211_supported_band *sband, 836 struct ieee80211_mgd_assoc_data *assoc_data) 837 { 838 unsigned int shift = ieee80211_chanwidth_get_shift(width); 839 unsigned int rates_len, supp_rates_len; 840 u32 rates = 0; 841 int i, count; 842 u8 *pos; 843 844 if (assoc_data->supp_rates_len) { 845 /* 846 * Get all rates supported by the device and the AP as 847 * some APs don't like getting a superset of their rates 848 * in the association request (e.g. D-Link DAP 1353 in 849 * b-only mode)... 850 */ 851 rates_len = ieee80211_parse_bitrates(width, sband, 852 assoc_data->supp_rates, 853 assoc_data->supp_rates_len, 854 &rates); 855 } else { 856 /* 857 * In case AP not provide any supported rates information 858 * before association, we send information element(s) with 859 * all rates that we support. 860 */ 861 rates_len = sband->n_bitrates; 862 for (i = 0; i < sband->n_bitrates; i++) 863 rates |= BIT(i); 864 } 865 866 supp_rates_len = rates_len; 867 if (supp_rates_len > 8) 868 supp_rates_len = 8; 869 870 pos = skb_put(skb, supp_rates_len + 2); 871 *pos++ = WLAN_EID_SUPP_RATES; 872 *pos++ = supp_rates_len; 873 874 count = 0; 875 for (i = 0; i < sband->n_bitrates; i++) { 876 if (BIT(i) & rates) { 877 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 878 5 * (1 << shift)); 879 *pos++ = (u8)rate; 880 if (++count == 8) 881 break; 882 } 883 } 884 885 if (rates_len > count) { 886 pos = skb_put(skb, rates_len - count + 2); 887 *pos++ = WLAN_EID_EXT_SUPP_RATES; 888 *pos++ = rates_len - count; 889 890 for (i++; i < sband->n_bitrates; i++) { 891 if (BIT(i) & rates) { 892 int rate; 893 894 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 895 5 * (1 << shift)); 896 *pos++ = (u8)rate; 897 } 898 } 899 } 900 } 901 902 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 903 const u8 *elems, 904 size_t elems_len, 905 size_t offset) 906 { 907 size_t noffset; 908 909 static const u8 before_ht[] = { 910 WLAN_EID_SSID, 911 WLAN_EID_SUPP_RATES, 912 WLAN_EID_EXT_SUPP_RATES, 913 WLAN_EID_PWR_CAPABILITY, 914 WLAN_EID_SUPPORTED_CHANNELS, 915 WLAN_EID_RSN, 916 WLAN_EID_QOS_CAPA, 917 WLAN_EID_RRM_ENABLED_CAPABILITIES, 918 WLAN_EID_MOBILITY_DOMAIN, 919 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 920 WLAN_EID_RIC_DATA, /* reassoc only */ 921 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 922 }; 923 static const u8 after_ric[] = { 924 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 925 WLAN_EID_HT_CAPABILITY, 926 WLAN_EID_BSS_COEX_2040, 927 /* luckily this is almost always there */ 928 WLAN_EID_EXT_CAPABILITY, 929 WLAN_EID_QOS_TRAFFIC_CAPA, 930 WLAN_EID_TIM_BCAST_REQ, 931 WLAN_EID_INTERWORKING, 932 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 933 WLAN_EID_VHT_CAPABILITY, 934 WLAN_EID_OPMODE_NOTIF, 935 }; 936 937 if (!elems_len) 938 return offset; 939 940 noffset = ieee80211_ie_split_ric(elems, elems_len, 941 before_ht, 942 ARRAY_SIZE(before_ht), 943 after_ric, 944 ARRAY_SIZE(after_ric), 945 offset); 946 skb_put_data(skb, elems + offset, noffset - offset); 947 948 return noffset; 949 } 950 951 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 952 const u8 *elems, 953 size_t elems_len, 954 size_t offset) 955 { 956 static const u8 before_vht[] = { 957 /* 958 * no need to list the ones split off before HT 959 * or generated here 960 */ 961 WLAN_EID_BSS_COEX_2040, 962 WLAN_EID_EXT_CAPABILITY, 963 WLAN_EID_QOS_TRAFFIC_CAPA, 964 WLAN_EID_TIM_BCAST_REQ, 965 WLAN_EID_INTERWORKING, 966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 967 }; 968 size_t noffset; 969 970 if (!elems_len) 971 return offset; 972 973 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 974 noffset = ieee80211_ie_split(elems, elems_len, 975 before_vht, ARRAY_SIZE(before_vht), 976 offset); 977 skb_put_data(skb, elems + offset, noffset - offset); 978 979 return noffset; 980 } 981 982 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 983 const u8 *elems, 984 size_t elems_len, 985 size_t offset) 986 { 987 static const u8 before_he[] = { 988 /* 989 * no need to list the ones split off before VHT 990 * or generated here 991 */ 992 WLAN_EID_OPMODE_NOTIF, 993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 994 /* 11ai elements */ 995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 996 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1000 /* TODO: add 11ah/11aj/11ak elements */ 1001 }; 1002 size_t noffset; 1003 1004 if (!elems_len) 1005 return offset; 1006 1007 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1008 noffset = ieee80211_ie_split(elems, elems_len, 1009 before_he, ARRAY_SIZE(before_he), 1010 offset); 1011 skb_put_data(skb, elems + offset, noffset - offset); 1012 1013 return noffset; 1014 } 1015 1016 #define PRESENT_ELEMS_MAX 8 1017 #define PRESENT_ELEM_EXT_OFFS 0x100 1018 1019 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1020 struct sk_buff *skb, u16 capab, 1021 const struct element *ext_capa, 1022 const u16 *present_elems); 1023 1024 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1025 struct sk_buff *skb, u16 *capab, 1026 const struct element *ext_capa, 1027 const u8 *extra_elems, 1028 size_t extra_elems_len, 1029 unsigned int link_id, 1030 struct ieee80211_link_data *link, 1031 u16 *present_elems) 1032 { 1033 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1035 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1036 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1037 struct ieee80211_channel *chan = cbss->channel; 1038 const struct ieee80211_sband_iftype_data *iftd; 1039 struct ieee80211_local *local = sdata->local; 1040 struct ieee80211_supported_band *sband; 1041 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1042 struct ieee80211_chanctx_conf *chanctx_conf; 1043 enum ieee80211_smps_mode smps_mode; 1044 u16 orig_capab = *capab; 1045 size_t offset = 0; 1046 int present_elems_len = 0; 1047 u8 *pos; 1048 int i; 1049 1050 #define ADD_PRESENT_ELEM(id) do { \ 1051 /* need a last for termination - we use 0 == SSID */ \ 1052 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1053 present_elems[present_elems_len++] = (id); \ 1054 } while (0) 1055 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1056 1057 if (link) 1058 smps_mode = link->smps_mode; 1059 else if (sdata->u.mgd.powersave) 1060 smps_mode = IEEE80211_SMPS_DYNAMIC; 1061 else 1062 smps_mode = IEEE80211_SMPS_OFF; 1063 1064 if (link) { 1065 /* 1066 * 5/10 MHz scenarios are only viable without MLO, in which 1067 * case this pointer should be used ... All of this is a bit 1068 * unclear though, not sure this even works at all. 1069 */ 1070 rcu_read_lock(); 1071 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1072 if (chanctx_conf) 1073 width = chanctx_conf->def.width; 1074 rcu_read_unlock(); 1075 } 1076 1077 sband = local->hw.wiphy->bands[chan->band]; 1078 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1079 1080 if (sband->band == NL80211_BAND_2GHZ) { 1081 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1082 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1083 } 1084 1085 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1086 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1087 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1088 1089 if (sband->band != NL80211_BAND_S1GHZ) 1090 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1091 1092 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1093 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1094 struct cfg80211_chan_def chandef = { 1095 .width = width, 1096 .chan = chan, 1097 }; 1098 1099 pos = skb_put(skb, 4); 1100 *pos++ = WLAN_EID_PWR_CAPABILITY; 1101 *pos++ = 2; 1102 *pos++ = 0; /* min tx power */ 1103 /* max tx power */ 1104 *pos++ = ieee80211_chandef_max_power(&chandef); 1105 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1106 } 1107 1108 /* 1109 * Per spec, we shouldn't include the list of channels if we advertise 1110 * support for extended channel switching, but we've always done that; 1111 * (for now?) apply this restriction only on the (new) 6 GHz band. 1112 */ 1113 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1114 (sband->band != NL80211_BAND_6GHZ || 1115 !ext_capa || ext_capa->datalen < 1 || 1116 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1117 /* TODO: get this in reg domain format */ 1118 pos = skb_put(skb, 2 * sband->n_channels + 2); 1119 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1120 *pos++ = 2 * sband->n_channels; 1121 for (i = 0; i < sband->n_channels; i++) { 1122 int cf = sband->channels[i].center_freq; 1123 1124 *pos++ = ieee80211_frequency_to_channel(cf); 1125 *pos++ = 1; /* one channel in the subband*/ 1126 } 1127 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1128 } 1129 1130 /* if present, add any custom IEs that go before HT */ 1131 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1132 extra_elems_len, 1133 offset); 1134 1135 if (sband->band != NL80211_BAND_6GHZ && 1136 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1137 ieee80211_add_ht_ie(sdata, skb, 1138 assoc_data->link[link_id].ap_ht_param, 1139 sband, chan, smps_mode, 1140 assoc_data->link[link_id].conn_flags); 1141 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1142 } 1143 1144 /* if present, add any custom IEs that go before VHT */ 1145 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1146 extra_elems_len, 1147 offset); 1148 1149 if (sband->band != NL80211_BAND_6GHZ && 1150 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1151 bool mu_mimo_owner = 1152 ieee80211_add_vht_ie(sdata, skb, sband, 1153 &assoc_data->link[link_id].ap_vht_cap, 1154 assoc_data->link[link_id].conn_flags); 1155 1156 if (link) 1157 link->conf->mu_mimo_owner = mu_mimo_owner; 1158 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1159 } 1160 1161 /* 1162 * If AP doesn't support HT, mark HE and EHT as disabled. 1163 * If on the 5GHz band, make sure it supports VHT. 1164 */ 1165 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1166 (sband->band == NL80211_BAND_5GHZ && 1167 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1168 assoc_data->link[link_id].conn_flags |= 1169 IEEE80211_CONN_DISABLE_HE | 1170 IEEE80211_CONN_DISABLE_EHT; 1171 1172 /* if present, add any custom IEs that go before HE */ 1173 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1174 extra_elems_len, 1175 offset); 1176 1177 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1178 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1179 assoc_data->link[link_id].conn_flags); 1180 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1181 } 1182 1183 /* 1184 * careful - need to know about all the present elems before 1185 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1186 * we're going to put it after the ML element 1187 */ 1188 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1189 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1190 1191 if (link_id == assoc_data->assoc_link_id) 1192 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1193 present_elems); 1194 1195 /* crash if somebody gets it wrong */ 1196 present_elems = NULL; 1197 1198 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1199 ieee80211_add_eht_ie(sdata, skb, sband); 1200 1201 if (sband->band == NL80211_BAND_S1GHZ) { 1202 ieee80211_add_aid_request_ie(sdata, skb); 1203 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1204 } 1205 1206 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1207 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1208 1209 if (link) 1210 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1211 1212 return offset; 1213 } 1214 1215 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1216 const u16 *outer, 1217 const u16 *inner) 1218 { 1219 unsigned int skb_len = skb->len; 1220 bool at_extension = false; 1221 bool added = false; 1222 int i, j; 1223 u8 *len, *list_len = NULL; 1224 1225 skb_put_u8(skb, WLAN_EID_EXTENSION); 1226 len = skb_put(skb, 1); 1227 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1228 1229 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1230 u16 elem = outer[i]; 1231 bool have_inner = false; 1232 1233 /* should at least be sorted in the sense of normal -> ext */ 1234 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1235 1236 /* switch to extension list */ 1237 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1238 at_extension = true; 1239 if (!list_len) 1240 skb_put_u8(skb, 0); 1241 list_len = NULL; 1242 } 1243 1244 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1245 if (elem == inner[j]) { 1246 have_inner = true; 1247 break; 1248 } 1249 } 1250 1251 if (have_inner) 1252 continue; 1253 1254 if (!list_len) { 1255 list_len = skb_put(skb, 1); 1256 *list_len = 0; 1257 } 1258 *list_len += 1; 1259 skb_put_u8(skb, (u8)elem); 1260 added = true; 1261 } 1262 1263 /* if we added a list but no extension list, make a zero-len one */ 1264 if (added && (!at_extension || !list_len)) 1265 skb_put_u8(skb, 0); 1266 1267 /* if nothing added remove extension element completely */ 1268 if (!added) 1269 skb_trim(skb, skb_len); 1270 else 1271 *len = skb->len - skb_len - 2; 1272 } 1273 1274 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1275 struct sk_buff *skb, u16 capab, 1276 const struct element *ext_capa, 1277 const u16 *outer_present_elems) 1278 { 1279 struct ieee80211_local *local = sdata->local; 1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1281 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1282 struct ieee80211_multi_link_elem *ml_elem; 1283 struct ieee80211_mle_basic_common_info *common; 1284 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1285 __le16 eml_capa = 0, mld_capa_ops = 0; 1286 unsigned int link_id; 1287 u8 *ml_elem_len; 1288 void *capab_pos; 1289 1290 if (!sdata->vif.valid_links) 1291 return; 1292 1293 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1294 ieee80211_vif_type_p2p(&sdata->vif)); 1295 if (ift_ext_capa) { 1296 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1297 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1298 } 1299 1300 skb_put_u8(skb, WLAN_EID_EXTENSION); 1301 ml_elem_len = skb_put(skb, 1); 1302 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1303 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1304 ml_elem->control = 1305 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1306 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1307 common = skb_put(skb, sizeof(*common)); 1308 common->len = sizeof(*common) + 1309 2; /* MLD capa/ops */ 1310 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1311 1312 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1313 if (eml_capa & 1314 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1315 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1316 common->len += 2; /* EML capabilities */ 1317 ml_elem->control |= 1318 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1319 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1320 } 1321 /* need indication from userspace to support this */ 1322 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1324 1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1327 const u8 *extra_elems; 1328 size_t extra_elems_len; 1329 size_t extra_used; 1330 u8 *subelem_len = NULL; 1331 __le16 ctrl; 1332 1333 if (!assoc_data->link[link_id].bss || 1334 link_id == assoc_data->assoc_link_id) 1335 continue; 1336 1337 extra_elems = assoc_data->link[link_id].elems; 1338 extra_elems_len = assoc_data->link[link_id].elems_len; 1339 1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1341 subelem_len = skb_put(skb, 1); 1342 1343 ctrl = cpu_to_le16(link_id | 1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1346 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1348 skb_put_data(skb, assoc_data->link[link_id].addr, 1349 ETH_ALEN); 1350 /* 1351 * Now add the contents of the (re)association request, 1352 * but the "listen interval" and "current AP address" 1353 * (if applicable) are skipped. So we only have 1354 * the capability field (remember the position and fill 1355 * later), followed by the elements added below by 1356 * calling ieee80211_assoc_link_elems(). 1357 */ 1358 capab_pos = skb_put(skb, 2); 1359 1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1361 ext_capa, 1362 extra_elems, 1363 extra_elems_len, 1364 link_id, NULL, 1365 link_present_elems); 1366 if (extra_elems) 1367 skb_put_data(skb, extra_elems + extra_used, 1368 extra_elems_len - extra_used); 1369 1370 put_unaligned_le16(capab, capab_pos); 1371 1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1373 link_present_elems); 1374 1375 ieee80211_fragment_element(skb, subelem_len); 1376 } 1377 1378 ieee80211_fragment_element(skb, ml_elem_len); 1379 } 1380 1381 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1382 { 1383 struct ieee80211_local *local = sdata->local; 1384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1385 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1386 struct ieee80211_link_data *link; 1387 struct sk_buff *skb; 1388 struct ieee80211_mgmt *mgmt; 1389 u8 *pos, qos_info, *ie_start; 1390 size_t offset, noffset; 1391 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1392 __le16 listen_int; 1393 struct element *ext_capa = NULL; 1394 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1395 struct ieee80211_prep_tx_info info = {}; 1396 unsigned int link_id, n_links = 0; 1397 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1398 void *capab_pos; 1399 size_t size; 1400 int ret; 1401 1402 /* we know it's writable, cast away the const */ 1403 if (assoc_data->ie_len) 1404 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1405 assoc_data->ie, 1406 assoc_data->ie_len); 1407 1408 sdata_assert_lock(sdata); 1409 1410 size = local->hw.extra_tx_headroom + 1411 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1412 2 + assoc_data->ssid_len + /* SSID */ 1413 assoc_data->ie_len + /* extra IEs */ 1414 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1415 9; /* WMM */ 1416 1417 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1418 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1419 const struct ieee80211_sband_iftype_data *iftd; 1420 struct ieee80211_supported_band *sband; 1421 1422 if (!cbss) 1423 continue; 1424 1425 sband = local->hw.wiphy->bands[cbss->channel->band]; 1426 1427 n_links++; 1428 /* add STA profile elements length */ 1429 size += assoc_data->link[link_id].elems_len; 1430 /* and supported rates length */ 1431 size += 4 + sband->n_bitrates; 1432 /* supported channels */ 1433 size += 2 + 2 * sband->n_channels; 1434 1435 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1436 if (iftd) 1437 size += iftd->vendor_elems.len; 1438 1439 /* power capability */ 1440 size += 4; 1441 1442 /* HT, VHT, HE, EHT */ 1443 size += 2 + sizeof(struct ieee80211_ht_cap); 1444 size += 2 + sizeof(struct ieee80211_vht_cap); 1445 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1446 sizeof(struct ieee80211_he_mcs_nss_supp) + 1447 IEEE80211_HE_PPE_THRES_MAX_LEN; 1448 1449 if (sband->band == NL80211_BAND_6GHZ) 1450 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1451 1452 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1453 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1454 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1455 1456 /* non-inheritance element */ 1457 size += 2 + 2 + PRESENT_ELEMS_MAX; 1458 1459 /* should be the same across all BSSes */ 1460 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1461 capab |= WLAN_CAPABILITY_PRIVACY; 1462 } 1463 1464 if (sdata->vif.valid_links) { 1465 /* consider the multi-link element with STA profile */ 1466 size += sizeof(struct ieee80211_multi_link_elem); 1467 /* max common info field in basic multi-link element */ 1468 size += sizeof(struct ieee80211_mle_basic_common_info) + 1469 2 + /* capa & op */ 1470 2; /* EML capa */ 1471 1472 /* 1473 * The capability elements were already considered above; 1474 * note this over-estimates a bit because there's no 1475 * STA profile for the assoc link. 1476 */ 1477 size += (n_links - 1) * 1478 (1 + 1 + /* subelement ID/length */ 1479 2 + /* STA control */ 1480 1 + ETH_ALEN + 2 /* STA Info field */); 1481 } 1482 1483 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1484 if (WARN_ON(!link)) 1485 return -EINVAL; 1486 1487 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1488 return -EINVAL; 1489 1490 skb = alloc_skb(size, GFP_KERNEL); 1491 if (!skb) 1492 return -ENOMEM; 1493 1494 skb_reserve(skb, local->hw.extra_tx_headroom); 1495 1496 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1497 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1498 1499 /* Set MBSSID support for HE AP if needed */ 1500 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1501 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1502 ext_capa && ext_capa->datalen >= 3) 1503 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1504 1505 mgmt = skb_put_zero(skb, 24); 1506 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1507 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1508 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1509 1510 listen_int = cpu_to_le16(assoc_data->s1g ? 1511 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1512 local->hw.conf.listen_interval); 1513 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1514 skb_put(skb, 10); 1515 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1516 IEEE80211_STYPE_REASSOC_REQ); 1517 capab_pos = &mgmt->u.reassoc_req.capab_info; 1518 mgmt->u.reassoc_req.listen_interval = listen_int; 1519 memcpy(mgmt->u.reassoc_req.current_ap, 1520 assoc_data->prev_ap_addr, ETH_ALEN); 1521 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1522 } else { 1523 skb_put(skb, 4); 1524 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1525 IEEE80211_STYPE_ASSOC_REQ); 1526 capab_pos = &mgmt->u.assoc_req.capab_info; 1527 mgmt->u.assoc_req.listen_interval = listen_int; 1528 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1529 } 1530 1531 /* SSID */ 1532 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1533 ie_start = pos; 1534 *pos++ = WLAN_EID_SSID; 1535 *pos++ = assoc_data->ssid_len; 1536 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1537 1538 /* add the elements for the assoc (main) link */ 1539 link_capab = capab; 1540 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1541 ext_capa, 1542 assoc_data->ie, 1543 assoc_data->ie_len, 1544 assoc_data->assoc_link_id, link, 1545 present_elems); 1546 put_unaligned_le16(link_capab, capab_pos); 1547 1548 /* if present, add any custom non-vendor IEs */ 1549 if (assoc_data->ie_len) { 1550 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1551 assoc_data->ie_len, 1552 offset); 1553 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1554 offset = noffset; 1555 } 1556 1557 if (assoc_data->wmm) { 1558 if (assoc_data->uapsd) { 1559 qos_info = ifmgd->uapsd_queues; 1560 qos_info |= (ifmgd->uapsd_max_sp_len << 1561 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1562 } else { 1563 qos_info = 0; 1564 } 1565 1566 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1567 } 1568 1569 /* add any remaining custom (i.e. vendor specific here) IEs */ 1570 if (assoc_data->ie_len) { 1571 noffset = assoc_data->ie_len; 1572 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1573 } 1574 1575 if (assoc_data->fils_kek_len) { 1576 ret = fils_encrypt_assoc_req(skb, assoc_data); 1577 if (ret < 0) { 1578 dev_kfree_skb(skb); 1579 return ret; 1580 } 1581 } 1582 1583 pos = skb_tail_pointer(skb); 1584 kfree(ifmgd->assoc_req_ies); 1585 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1586 if (!ifmgd->assoc_req_ies) { 1587 dev_kfree_skb(skb); 1588 return -ENOMEM; 1589 } 1590 1591 ifmgd->assoc_req_ies_len = pos - ie_start; 1592 1593 drv_mgd_prepare_tx(local, sdata, &info); 1594 1595 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1596 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1597 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1598 IEEE80211_TX_INTFL_MLME_CONN_TX; 1599 ieee80211_tx_skb(sdata, skb); 1600 1601 return 0; 1602 } 1603 1604 void ieee80211_send_pspoll(struct ieee80211_local *local, 1605 struct ieee80211_sub_if_data *sdata) 1606 { 1607 struct ieee80211_pspoll *pspoll; 1608 struct sk_buff *skb; 1609 1610 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1611 if (!skb) 1612 return; 1613 1614 pspoll = (struct ieee80211_pspoll *) skb->data; 1615 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1616 1617 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1618 ieee80211_tx_skb(sdata, skb); 1619 } 1620 1621 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1622 struct ieee80211_sub_if_data *sdata, 1623 bool powersave) 1624 { 1625 struct sk_buff *skb; 1626 struct ieee80211_hdr_3addr *nullfunc; 1627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1628 1629 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1630 !ieee80211_hw_check(&local->hw, 1631 DOESNT_SUPPORT_QOS_NDP)); 1632 if (!skb) 1633 return; 1634 1635 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1636 if (powersave) 1637 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1638 1639 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1640 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1641 1642 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1643 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1644 1645 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1646 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1647 1648 ieee80211_tx_skb(sdata, skb); 1649 } 1650 1651 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1652 struct ieee80211_sub_if_data *sdata) 1653 { 1654 struct sk_buff *skb; 1655 struct ieee80211_hdr *nullfunc; 1656 __le16 fc; 1657 1658 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1659 return; 1660 1661 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1662 if (!skb) 1663 return; 1664 1665 skb_reserve(skb, local->hw.extra_tx_headroom); 1666 1667 nullfunc = skb_put_zero(skb, 30); 1668 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1669 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1670 nullfunc->frame_control = fc; 1671 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1672 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1673 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1674 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1675 1676 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1678 ieee80211_tx_skb(sdata, skb); 1679 } 1680 1681 /* spectrum management related things */ 1682 static void ieee80211_chswitch_work(struct work_struct *work) 1683 { 1684 struct ieee80211_link_data *link = 1685 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1686 struct ieee80211_sub_if_data *sdata = link->sdata; 1687 struct ieee80211_local *local = sdata->local; 1688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1689 int ret; 1690 1691 if (!ieee80211_sdata_running(sdata)) 1692 return; 1693 1694 sdata_lock(sdata); 1695 mutex_lock(&local->mtx); 1696 mutex_lock(&local->chanctx_mtx); 1697 1698 if (!ifmgd->associated) 1699 goto out; 1700 1701 if (!link->conf->csa_active) 1702 goto out; 1703 1704 /* 1705 * using reservation isn't immediate as it may be deferred until later 1706 * with multi-vif. once reservation is complete it will re-schedule the 1707 * work with no reserved_chanctx so verify chandef to check if it 1708 * completed successfully 1709 */ 1710 1711 if (link->reserved_chanctx) { 1712 /* 1713 * with multi-vif csa driver may call ieee80211_csa_finish() 1714 * many times while waiting for other interfaces to use their 1715 * reservations 1716 */ 1717 if (link->reserved_ready) 1718 goto out; 1719 1720 ret = ieee80211_link_use_reserved_context(link); 1721 if (ret) { 1722 sdata_info(sdata, 1723 "failed to use reserved channel context, disconnecting (err=%d)\n", 1724 ret); 1725 ieee80211_queue_work(&sdata->local->hw, 1726 &ifmgd->csa_connection_drop_work); 1727 goto out; 1728 } 1729 1730 goto out; 1731 } 1732 1733 if (!cfg80211_chandef_identical(&link->conf->chandef, 1734 &link->csa_chandef)) { 1735 sdata_info(sdata, 1736 "failed to finalize channel switch, disconnecting\n"); 1737 ieee80211_queue_work(&sdata->local->hw, 1738 &ifmgd->csa_connection_drop_work); 1739 goto out; 1740 } 1741 1742 link->u.mgd.csa_waiting_bcn = true; 1743 1744 ieee80211_sta_reset_beacon_monitor(sdata); 1745 ieee80211_sta_reset_conn_monitor(sdata); 1746 1747 out: 1748 mutex_unlock(&local->chanctx_mtx); 1749 mutex_unlock(&local->mtx); 1750 sdata_unlock(sdata); 1751 } 1752 1753 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1754 { 1755 struct ieee80211_sub_if_data *sdata = link->sdata; 1756 struct ieee80211_local *local = sdata->local; 1757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1758 int ret; 1759 1760 sdata_assert_lock(sdata); 1761 1762 WARN_ON(!link->conf->csa_active); 1763 1764 if (link->csa_block_tx) { 1765 ieee80211_wake_vif_queues(local, sdata, 1766 IEEE80211_QUEUE_STOP_REASON_CSA); 1767 link->csa_block_tx = false; 1768 } 1769 1770 link->conf->csa_active = false; 1771 link->u.mgd.csa_waiting_bcn = false; 1772 /* 1773 * If the CSA IE is still present on the beacon after the switch, 1774 * we need to consider it as a new CSA (possibly to self). 1775 */ 1776 link->u.mgd.beacon_crc_valid = false; 1777 1778 ret = drv_post_channel_switch(sdata); 1779 if (ret) { 1780 sdata_info(sdata, 1781 "driver post channel switch failed, disconnecting\n"); 1782 ieee80211_queue_work(&local->hw, 1783 &ifmgd->csa_connection_drop_work); 1784 return; 1785 } 1786 1787 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1788 } 1789 1790 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1791 { 1792 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1794 1795 if (WARN_ON(sdata->vif.valid_links)) 1796 success = false; 1797 1798 trace_api_chswitch_done(sdata, success); 1799 if (!success) { 1800 sdata_info(sdata, 1801 "driver channel switch failed, disconnecting\n"); 1802 ieee80211_queue_work(&sdata->local->hw, 1803 &ifmgd->csa_connection_drop_work); 1804 } else { 1805 ieee80211_queue_work(&sdata->local->hw, 1806 &sdata->deflink.u.mgd.chswitch_work); 1807 } 1808 } 1809 EXPORT_SYMBOL(ieee80211_chswitch_done); 1810 1811 static void ieee80211_chswitch_timer(struct timer_list *t) 1812 { 1813 struct ieee80211_link_data *link = 1814 from_timer(link, t, u.mgd.chswitch_timer); 1815 1816 ieee80211_queue_work(&link->sdata->local->hw, 1817 &link->u.mgd.chswitch_work); 1818 } 1819 1820 static void 1821 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1822 { 1823 struct ieee80211_sub_if_data *sdata = link->sdata; 1824 struct ieee80211_local *local = sdata->local; 1825 1826 if (!local->ops->abort_channel_switch) 1827 return; 1828 1829 mutex_lock(&local->mtx); 1830 1831 mutex_lock(&local->chanctx_mtx); 1832 ieee80211_link_unreserve_chanctx(link); 1833 mutex_unlock(&local->chanctx_mtx); 1834 1835 if (link->csa_block_tx) 1836 ieee80211_wake_vif_queues(local, sdata, 1837 IEEE80211_QUEUE_STOP_REASON_CSA); 1838 1839 link->csa_block_tx = false; 1840 link->conf->csa_active = false; 1841 1842 mutex_unlock(&local->mtx); 1843 1844 drv_abort_channel_switch(sdata); 1845 } 1846 1847 static void 1848 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1849 u64 timestamp, u32 device_timestamp, 1850 struct ieee802_11_elems *elems, 1851 bool beacon) 1852 { 1853 struct ieee80211_sub_if_data *sdata = link->sdata; 1854 struct ieee80211_local *local = sdata->local; 1855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1856 struct cfg80211_bss *cbss = link->u.mgd.bss; 1857 struct ieee80211_chanctx_conf *conf; 1858 struct ieee80211_chanctx *chanctx; 1859 enum nl80211_band current_band; 1860 struct ieee80211_csa_ie csa_ie; 1861 struct ieee80211_channel_switch ch_switch; 1862 struct ieee80211_bss *bss; 1863 int res; 1864 1865 sdata_assert_lock(sdata); 1866 1867 if (!cbss) 1868 return; 1869 1870 if (local->scanning) 1871 return; 1872 1873 current_band = cbss->channel->band; 1874 bss = (void *)cbss->priv; 1875 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1876 bss->vht_cap_info, 1877 link->u.mgd.conn_flags, 1878 link->u.mgd.bssid, &csa_ie); 1879 1880 if (!res) { 1881 ch_switch.timestamp = timestamp; 1882 ch_switch.device_timestamp = device_timestamp; 1883 ch_switch.block_tx = csa_ie.mode; 1884 ch_switch.chandef = csa_ie.chandef; 1885 ch_switch.count = csa_ie.count; 1886 ch_switch.delay = csa_ie.max_switch_time; 1887 } 1888 1889 if (res < 0) 1890 goto lock_and_drop_connection; 1891 1892 if (beacon && link->conf->csa_active && 1893 !link->u.mgd.csa_waiting_bcn) { 1894 if (res) 1895 ieee80211_sta_abort_chanswitch(link); 1896 else 1897 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1898 return; 1899 } else if (link->conf->csa_active || res) { 1900 /* disregard subsequent announcements if already processing */ 1901 return; 1902 } 1903 1904 if (link->conf->chandef.chan->band != 1905 csa_ie.chandef.chan->band) { 1906 sdata_info(sdata, 1907 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1908 link->u.mgd.bssid, 1909 csa_ie.chandef.chan->center_freq, 1910 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1911 csa_ie.chandef.center_freq2); 1912 goto lock_and_drop_connection; 1913 } 1914 1915 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1916 IEEE80211_CHAN_DISABLED)) { 1917 sdata_info(sdata, 1918 "AP %pM switches to unsupported channel " 1919 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1920 "disconnecting\n", 1921 link->u.mgd.bssid, 1922 csa_ie.chandef.chan->center_freq, 1923 csa_ie.chandef.chan->freq_offset, 1924 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1925 csa_ie.chandef.freq1_offset, 1926 csa_ie.chandef.center_freq2); 1927 goto lock_and_drop_connection; 1928 } 1929 1930 if (cfg80211_chandef_identical(&csa_ie.chandef, 1931 &link->conf->chandef) && 1932 (!csa_ie.mode || !beacon)) { 1933 if (link->u.mgd.csa_ignored_same_chan) 1934 return; 1935 sdata_info(sdata, 1936 "AP %pM tries to chanswitch to same channel, ignore\n", 1937 link->u.mgd.bssid); 1938 link->u.mgd.csa_ignored_same_chan = true; 1939 return; 1940 } 1941 1942 /* 1943 * Drop all TDLS peers - either we disconnect or move to a different 1944 * channel from this point on. There's no telling what our peer will do. 1945 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1946 * have an incompatible wider chandef. 1947 */ 1948 ieee80211_teardown_tdls_peers(sdata); 1949 1950 mutex_lock(&local->mtx); 1951 mutex_lock(&local->chanctx_mtx); 1952 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1953 lockdep_is_held(&local->chanctx_mtx)); 1954 if (!conf) { 1955 sdata_info(sdata, 1956 "no channel context assigned to vif?, disconnecting\n"); 1957 goto drop_connection; 1958 } 1959 1960 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1961 1962 if (local->use_chanctx && 1963 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1964 sdata_info(sdata, 1965 "driver doesn't support chan-switch with channel contexts\n"); 1966 goto drop_connection; 1967 } 1968 1969 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1970 sdata_info(sdata, 1971 "preparing for channel switch failed, disconnecting\n"); 1972 goto drop_connection; 1973 } 1974 1975 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1976 chanctx->mode, false); 1977 if (res) { 1978 sdata_info(sdata, 1979 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1980 res); 1981 goto drop_connection; 1982 } 1983 mutex_unlock(&local->chanctx_mtx); 1984 1985 link->conf->csa_active = true; 1986 link->csa_chandef = csa_ie.chandef; 1987 link->csa_block_tx = csa_ie.mode; 1988 link->u.mgd.csa_ignored_same_chan = false; 1989 link->u.mgd.beacon_crc_valid = false; 1990 1991 if (link->csa_block_tx) 1992 ieee80211_stop_vif_queues(local, sdata, 1993 IEEE80211_QUEUE_STOP_REASON_CSA); 1994 mutex_unlock(&local->mtx); 1995 1996 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1997 csa_ie.count, csa_ie.mode, 0); 1998 1999 if (local->ops->channel_switch) { 2000 /* use driver's channel switch callback */ 2001 drv_channel_switch(local, sdata, &ch_switch); 2002 return; 2003 } 2004 2005 /* channel switch handled in software */ 2006 if (csa_ie.count <= 1) 2007 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 2008 else 2009 mod_timer(&link->u.mgd.chswitch_timer, 2010 TU_TO_EXP_TIME((csa_ie.count - 1) * 2011 cbss->beacon_interval)); 2012 return; 2013 lock_and_drop_connection: 2014 mutex_lock(&local->mtx); 2015 mutex_lock(&local->chanctx_mtx); 2016 drop_connection: 2017 /* 2018 * This is just so that the disconnect flow will know that 2019 * we were trying to switch channel and failed. In case the 2020 * mode is 1 (we are not allowed to Tx), we will know not to 2021 * send a deauthentication frame. Those two fields will be 2022 * reset when the disconnection worker runs. 2023 */ 2024 link->conf->csa_active = true; 2025 link->csa_block_tx = csa_ie.mode; 2026 2027 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 2028 mutex_unlock(&local->chanctx_mtx); 2029 mutex_unlock(&local->mtx); 2030 } 2031 2032 static bool 2033 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2034 struct ieee80211_channel *channel, 2035 const u8 *country_ie, u8 country_ie_len, 2036 const u8 *pwr_constr_elem, 2037 int *chan_pwr, int *pwr_reduction) 2038 { 2039 struct ieee80211_country_ie_triplet *triplet; 2040 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2041 int i, chan_increment; 2042 bool have_chan_pwr = false; 2043 2044 /* Invalid IE */ 2045 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2046 return false; 2047 2048 triplet = (void *)(country_ie + 3); 2049 country_ie_len -= 3; 2050 2051 switch (channel->band) { 2052 default: 2053 WARN_ON_ONCE(1); 2054 fallthrough; 2055 case NL80211_BAND_2GHZ: 2056 case NL80211_BAND_60GHZ: 2057 case NL80211_BAND_LC: 2058 chan_increment = 1; 2059 break; 2060 case NL80211_BAND_5GHZ: 2061 chan_increment = 4; 2062 break; 2063 case NL80211_BAND_6GHZ: 2064 /* 2065 * In the 6 GHz band, the "maximum transmit power level" 2066 * field in the triplets is reserved, and thus will be 2067 * zero and we shouldn't use it to control TX power. 2068 * The actual TX power will be given in the transmit 2069 * power envelope element instead. 2070 */ 2071 return false; 2072 } 2073 2074 /* find channel */ 2075 while (country_ie_len >= 3) { 2076 u8 first_channel = triplet->chans.first_channel; 2077 2078 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2079 goto next; 2080 2081 for (i = 0; i < triplet->chans.num_channels; i++) { 2082 if (first_channel + i * chan_increment == chan) { 2083 have_chan_pwr = true; 2084 *chan_pwr = triplet->chans.max_power; 2085 break; 2086 } 2087 } 2088 if (have_chan_pwr) 2089 break; 2090 2091 next: 2092 triplet++; 2093 country_ie_len -= 3; 2094 } 2095 2096 if (have_chan_pwr && pwr_constr_elem) 2097 *pwr_reduction = *pwr_constr_elem; 2098 else 2099 *pwr_reduction = 0; 2100 2101 return have_chan_pwr; 2102 } 2103 2104 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2105 struct ieee80211_channel *channel, 2106 const u8 *cisco_dtpc_ie, 2107 int *pwr_level) 2108 { 2109 /* From practical testing, the first data byte of the DTPC element 2110 * seems to contain the requested dBm level, and the CLI on Cisco 2111 * APs clearly state the range is -127 to 127 dBm, which indicates 2112 * a signed byte, although it seemingly never actually goes negative. 2113 * The other byte seems to always be zero. 2114 */ 2115 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2116 } 2117 2118 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2119 struct ieee80211_channel *channel, 2120 struct ieee80211_mgmt *mgmt, 2121 const u8 *country_ie, u8 country_ie_len, 2122 const u8 *pwr_constr_ie, 2123 const u8 *cisco_dtpc_ie) 2124 { 2125 struct ieee80211_sub_if_data *sdata = link->sdata; 2126 bool has_80211h_pwr = false, has_cisco_pwr = false; 2127 int chan_pwr = 0, pwr_reduction_80211h = 0; 2128 int pwr_level_cisco, pwr_level_80211h; 2129 int new_ap_level; 2130 __le16 capab = mgmt->u.probe_resp.capab_info; 2131 2132 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2133 return 0; /* TODO */ 2134 2135 if (country_ie && 2136 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2137 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2138 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2139 sdata, channel, country_ie, country_ie_len, 2140 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2141 pwr_level_80211h = 2142 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2143 } 2144 2145 if (cisco_dtpc_ie) { 2146 ieee80211_find_cisco_dtpc( 2147 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2148 has_cisco_pwr = true; 2149 } 2150 2151 if (!has_80211h_pwr && !has_cisco_pwr) 2152 return 0; 2153 2154 /* If we have both 802.11h and Cisco DTPC, apply both limits 2155 * by picking the smallest of the two power levels advertised. 2156 */ 2157 if (has_80211h_pwr && 2158 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2159 new_ap_level = pwr_level_80211h; 2160 2161 if (link->ap_power_level == new_ap_level) 2162 return 0; 2163 2164 sdata_dbg(sdata, 2165 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2166 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2167 link->u.mgd.bssid); 2168 } else { /* has_cisco_pwr is always true here. */ 2169 new_ap_level = pwr_level_cisco; 2170 2171 if (link->ap_power_level == new_ap_level) 2172 return 0; 2173 2174 sdata_dbg(sdata, 2175 "Limiting TX power to %d dBm as advertised by %pM\n", 2176 pwr_level_cisco, link->u.mgd.bssid); 2177 } 2178 2179 link->ap_power_level = new_ap_level; 2180 if (__ieee80211_recalc_txpower(sdata)) 2181 return BSS_CHANGED_TXPOWER; 2182 return 0; 2183 } 2184 2185 /* powersave */ 2186 static void ieee80211_enable_ps(struct ieee80211_local *local, 2187 struct ieee80211_sub_if_data *sdata) 2188 { 2189 struct ieee80211_conf *conf = &local->hw.conf; 2190 2191 /* 2192 * If we are scanning right now then the parameters will 2193 * take effect when scan finishes. 2194 */ 2195 if (local->scanning) 2196 return; 2197 2198 if (conf->dynamic_ps_timeout > 0 && 2199 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2200 mod_timer(&local->dynamic_ps_timer, jiffies + 2201 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2202 } else { 2203 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2204 ieee80211_send_nullfunc(local, sdata, true); 2205 2206 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2207 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2208 return; 2209 2210 conf->flags |= IEEE80211_CONF_PS; 2211 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2212 } 2213 } 2214 2215 static void ieee80211_change_ps(struct ieee80211_local *local) 2216 { 2217 struct ieee80211_conf *conf = &local->hw.conf; 2218 2219 if (local->ps_sdata) { 2220 ieee80211_enable_ps(local, local->ps_sdata); 2221 } else if (conf->flags & IEEE80211_CONF_PS) { 2222 conf->flags &= ~IEEE80211_CONF_PS; 2223 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2224 del_timer_sync(&local->dynamic_ps_timer); 2225 cancel_work_sync(&local->dynamic_ps_enable_work); 2226 } 2227 } 2228 2229 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2230 { 2231 struct ieee80211_local *local = sdata->local; 2232 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2233 struct sta_info *sta = NULL; 2234 bool authorized = false; 2235 2236 if (!mgd->powersave) 2237 return false; 2238 2239 if (mgd->broken_ap) 2240 return false; 2241 2242 if (!mgd->associated) 2243 return false; 2244 2245 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2246 return false; 2247 2248 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2249 !sdata->deflink.u.mgd.have_beacon) 2250 return false; 2251 2252 rcu_read_lock(); 2253 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2254 if (sta) 2255 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2256 rcu_read_unlock(); 2257 2258 return authorized; 2259 } 2260 2261 /* need to hold RTNL or interface lock */ 2262 void ieee80211_recalc_ps(struct ieee80211_local *local) 2263 { 2264 struct ieee80211_sub_if_data *sdata, *found = NULL; 2265 int count = 0; 2266 int timeout; 2267 2268 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2269 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2270 local->ps_sdata = NULL; 2271 return; 2272 } 2273 2274 list_for_each_entry(sdata, &local->interfaces, list) { 2275 if (!ieee80211_sdata_running(sdata)) 2276 continue; 2277 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2278 /* If an AP vif is found, then disable PS 2279 * by setting the count to zero thereby setting 2280 * ps_sdata to NULL. 2281 */ 2282 count = 0; 2283 break; 2284 } 2285 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2286 continue; 2287 found = sdata; 2288 count++; 2289 } 2290 2291 if (count == 1 && ieee80211_powersave_allowed(found)) { 2292 u8 dtimper = found->deflink.u.mgd.dtim_period; 2293 2294 timeout = local->dynamic_ps_forced_timeout; 2295 if (timeout < 0) 2296 timeout = 100; 2297 local->hw.conf.dynamic_ps_timeout = timeout; 2298 2299 /* If the TIM IE is invalid, pretend the value is 1 */ 2300 if (!dtimper) 2301 dtimper = 1; 2302 2303 local->hw.conf.ps_dtim_period = dtimper; 2304 local->ps_sdata = found; 2305 } else { 2306 local->ps_sdata = NULL; 2307 } 2308 2309 ieee80211_change_ps(local); 2310 } 2311 2312 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2313 { 2314 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2315 2316 if (sdata->vif.cfg.ps != ps_allowed) { 2317 sdata->vif.cfg.ps = ps_allowed; 2318 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2319 } 2320 } 2321 2322 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2323 { 2324 struct ieee80211_local *local = 2325 container_of(work, struct ieee80211_local, 2326 dynamic_ps_disable_work); 2327 2328 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2329 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2330 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2331 } 2332 2333 ieee80211_wake_queues_by_reason(&local->hw, 2334 IEEE80211_MAX_QUEUE_MAP, 2335 IEEE80211_QUEUE_STOP_REASON_PS, 2336 false); 2337 } 2338 2339 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2340 { 2341 struct ieee80211_local *local = 2342 container_of(work, struct ieee80211_local, 2343 dynamic_ps_enable_work); 2344 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2345 struct ieee80211_if_managed *ifmgd; 2346 unsigned long flags; 2347 int q; 2348 2349 /* can only happen when PS was just disabled anyway */ 2350 if (!sdata) 2351 return; 2352 2353 ifmgd = &sdata->u.mgd; 2354 2355 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2356 return; 2357 2358 if (local->hw.conf.dynamic_ps_timeout > 0) { 2359 /* don't enter PS if TX frames are pending */ 2360 if (drv_tx_frames_pending(local)) { 2361 mod_timer(&local->dynamic_ps_timer, jiffies + 2362 msecs_to_jiffies( 2363 local->hw.conf.dynamic_ps_timeout)); 2364 return; 2365 } 2366 2367 /* 2368 * transmission can be stopped by others which leads to 2369 * dynamic_ps_timer expiry. Postpone the ps timer if it 2370 * is not the actual idle state. 2371 */ 2372 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2373 for (q = 0; q < local->hw.queues; q++) { 2374 if (local->queue_stop_reasons[q]) { 2375 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2376 flags); 2377 mod_timer(&local->dynamic_ps_timer, jiffies + 2378 msecs_to_jiffies( 2379 local->hw.conf.dynamic_ps_timeout)); 2380 return; 2381 } 2382 } 2383 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2384 } 2385 2386 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2387 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2388 if (drv_tx_frames_pending(local)) { 2389 mod_timer(&local->dynamic_ps_timer, jiffies + 2390 msecs_to_jiffies( 2391 local->hw.conf.dynamic_ps_timeout)); 2392 } else { 2393 ieee80211_send_nullfunc(local, sdata, true); 2394 /* Flush to get the tx status of nullfunc frame */ 2395 ieee80211_flush_queues(local, sdata, false); 2396 } 2397 } 2398 2399 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2400 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2401 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2402 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2403 local->hw.conf.flags |= IEEE80211_CONF_PS; 2404 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2405 } 2406 } 2407 2408 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2409 { 2410 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2411 2412 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2413 } 2414 2415 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2416 { 2417 struct delayed_work *delayed_work = to_delayed_work(work); 2418 struct ieee80211_link_data *link = 2419 container_of(delayed_work, struct ieee80211_link_data, 2420 dfs_cac_timer_work); 2421 struct cfg80211_chan_def chandef = link->conf->chandef; 2422 struct ieee80211_sub_if_data *sdata = link->sdata; 2423 2424 mutex_lock(&sdata->local->mtx); 2425 if (sdata->wdev.cac_started) { 2426 ieee80211_link_release_channel(link); 2427 cfg80211_cac_event(sdata->dev, &chandef, 2428 NL80211_RADAR_CAC_FINISHED, 2429 GFP_KERNEL); 2430 } 2431 mutex_unlock(&sdata->local->mtx); 2432 } 2433 2434 static bool 2435 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2436 { 2437 struct ieee80211_local *local = sdata->local; 2438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2439 bool ret = false; 2440 int ac; 2441 2442 if (local->hw.queues < IEEE80211_NUM_ACS) 2443 return false; 2444 2445 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2446 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2447 int non_acm_ac; 2448 unsigned long now = jiffies; 2449 2450 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2451 tx_tspec->admitted_time && 2452 time_after(now, tx_tspec->time_slice_start + HZ)) { 2453 tx_tspec->consumed_tx_time = 0; 2454 tx_tspec->time_slice_start = now; 2455 2456 if (tx_tspec->downgraded) 2457 tx_tspec->action = 2458 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2459 } 2460 2461 switch (tx_tspec->action) { 2462 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2463 /* take the original parameters */ 2464 if (drv_conf_tx(local, &sdata->deflink, ac, 2465 &sdata->deflink.tx_conf[ac])) 2466 link_err(&sdata->deflink, 2467 "failed to set TX queue parameters for queue %d\n", 2468 ac); 2469 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2470 tx_tspec->downgraded = false; 2471 ret = true; 2472 break; 2473 case TX_TSPEC_ACTION_DOWNGRADE: 2474 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2475 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2476 ret = true; 2477 break; 2478 } 2479 /* downgrade next lower non-ACM AC */ 2480 for (non_acm_ac = ac + 1; 2481 non_acm_ac < IEEE80211_NUM_ACS; 2482 non_acm_ac++) 2483 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2484 break; 2485 /* Usually the loop will result in using BK even if it 2486 * requires admission control, but such a configuration 2487 * makes no sense and we have to transmit somehow - the 2488 * AC selection does the same thing. 2489 * If we started out trying to downgrade from BK, then 2490 * the extra condition here might be needed. 2491 */ 2492 if (non_acm_ac >= IEEE80211_NUM_ACS) 2493 non_acm_ac = IEEE80211_AC_BK; 2494 if (drv_conf_tx(local, &sdata->deflink, ac, 2495 &sdata->deflink.tx_conf[non_acm_ac])) 2496 link_err(&sdata->deflink, 2497 "failed to set TX queue parameters for queue %d\n", 2498 ac); 2499 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2500 ret = true; 2501 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2502 tx_tspec->time_slice_start + HZ - now + 1); 2503 break; 2504 case TX_TSPEC_ACTION_NONE: 2505 /* nothing now */ 2506 break; 2507 } 2508 } 2509 2510 return ret; 2511 } 2512 2513 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2514 { 2515 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2516 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2517 BSS_CHANGED_QOS); 2518 } 2519 2520 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2521 { 2522 struct ieee80211_sub_if_data *sdata; 2523 2524 sdata = container_of(work, struct ieee80211_sub_if_data, 2525 u.mgd.tx_tspec_wk.work); 2526 ieee80211_sta_handle_tspec_ac_params(sdata); 2527 } 2528 2529 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2530 { 2531 struct ieee80211_sub_if_data *sdata = link->sdata; 2532 struct ieee80211_local *local = sdata->local; 2533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2534 struct ieee80211_tx_queue_params *params = link->tx_conf; 2535 u8 ac; 2536 2537 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2538 mlme_dbg(sdata, 2539 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2540 ac, params[ac].acm, 2541 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2542 params[ac].txop, params[ac].uapsd, 2543 ifmgd->tx_tspec[ac].downgraded); 2544 if (!ifmgd->tx_tspec[ac].downgraded && 2545 drv_conf_tx(local, link, ac, ¶ms[ac])) 2546 link_err(link, 2547 "failed to set TX queue parameters for AC %d\n", 2548 ac); 2549 } 2550 } 2551 2552 /* MLME */ 2553 static bool 2554 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2555 struct ieee80211_link_data *link, 2556 const u8 *wmm_param, size_t wmm_param_len, 2557 const struct ieee80211_mu_edca_param_set *mu_edca) 2558 { 2559 struct ieee80211_sub_if_data *sdata = link->sdata; 2560 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2562 size_t left; 2563 int count, mu_edca_count, ac; 2564 const u8 *pos; 2565 u8 uapsd_queues = 0; 2566 2567 if (!local->ops->conf_tx) 2568 return false; 2569 2570 if (local->hw.queues < IEEE80211_NUM_ACS) 2571 return false; 2572 2573 if (!wmm_param) 2574 return false; 2575 2576 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2577 return false; 2578 2579 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2580 uapsd_queues = ifmgd->uapsd_queues; 2581 2582 count = wmm_param[6] & 0x0f; 2583 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2584 * if mu_edca was preset before and now it disappeared tell 2585 * the driver about it. 2586 */ 2587 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2588 if (count == link->u.mgd.wmm_last_param_set && 2589 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2590 return false; 2591 link->u.mgd.wmm_last_param_set = count; 2592 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2593 2594 pos = wmm_param + 8; 2595 left = wmm_param_len - 8; 2596 2597 memset(¶ms, 0, sizeof(params)); 2598 2599 sdata->wmm_acm = 0; 2600 for (; left >= 4; left -= 4, pos += 4) { 2601 int aci = (pos[0] >> 5) & 0x03; 2602 int acm = (pos[0] >> 4) & 0x01; 2603 bool uapsd = false; 2604 2605 switch (aci) { 2606 case 1: /* AC_BK */ 2607 ac = IEEE80211_AC_BK; 2608 if (acm) 2609 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2610 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2611 uapsd = true; 2612 params[ac].mu_edca = !!mu_edca; 2613 if (mu_edca) 2614 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2615 break; 2616 case 2: /* AC_VI */ 2617 ac = IEEE80211_AC_VI; 2618 if (acm) 2619 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2620 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2621 uapsd = true; 2622 params[ac].mu_edca = !!mu_edca; 2623 if (mu_edca) 2624 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2625 break; 2626 case 3: /* AC_VO */ 2627 ac = IEEE80211_AC_VO; 2628 if (acm) 2629 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2630 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2631 uapsd = true; 2632 params[ac].mu_edca = !!mu_edca; 2633 if (mu_edca) 2634 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2635 break; 2636 case 0: /* AC_BE */ 2637 default: 2638 ac = IEEE80211_AC_BE; 2639 if (acm) 2640 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2641 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2642 uapsd = true; 2643 params[ac].mu_edca = !!mu_edca; 2644 if (mu_edca) 2645 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2646 break; 2647 } 2648 2649 params[ac].aifs = pos[0] & 0x0f; 2650 2651 if (params[ac].aifs < 2) { 2652 sdata_info(sdata, 2653 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2654 params[ac].aifs, aci); 2655 params[ac].aifs = 2; 2656 } 2657 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2658 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2659 params[ac].txop = get_unaligned_le16(pos + 2); 2660 params[ac].acm = acm; 2661 params[ac].uapsd = uapsd; 2662 2663 if (params[ac].cw_min == 0 || 2664 params[ac].cw_min > params[ac].cw_max) { 2665 sdata_info(sdata, 2666 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2667 params[ac].cw_min, params[ac].cw_max, aci); 2668 return false; 2669 } 2670 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2671 } 2672 2673 /* WMM specification requires all 4 ACIs. */ 2674 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2675 if (params[ac].cw_min == 0) { 2676 sdata_info(sdata, 2677 "AP has invalid WMM params (missing AC %d), using defaults\n", 2678 ac); 2679 return false; 2680 } 2681 } 2682 2683 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2684 link->tx_conf[ac] = params[ac]; 2685 2686 ieee80211_mgd_set_link_qos_params(link); 2687 2688 /* enable WMM or activate new settings */ 2689 link->conf->qos = true; 2690 return true; 2691 } 2692 2693 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2694 { 2695 lockdep_assert_held(&sdata->local->mtx); 2696 2697 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2698 ieee80211_run_deferred_scan(sdata->local); 2699 } 2700 2701 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2702 { 2703 mutex_lock(&sdata->local->mtx); 2704 __ieee80211_stop_poll(sdata); 2705 mutex_unlock(&sdata->local->mtx); 2706 } 2707 2708 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2709 u16 capab, bool erp_valid, u8 erp) 2710 { 2711 struct ieee80211_bss_conf *bss_conf = link->conf; 2712 struct ieee80211_supported_band *sband; 2713 u32 changed = 0; 2714 bool use_protection; 2715 bool use_short_preamble; 2716 bool use_short_slot; 2717 2718 sband = ieee80211_get_link_sband(link); 2719 if (!sband) 2720 return changed; 2721 2722 if (erp_valid) { 2723 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2724 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2725 } else { 2726 use_protection = false; 2727 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2728 } 2729 2730 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2731 if (sband->band == NL80211_BAND_5GHZ || 2732 sband->band == NL80211_BAND_6GHZ) 2733 use_short_slot = true; 2734 2735 if (use_protection != bss_conf->use_cts_prot) { 2736 bss_conf->use_cts_prot = use_protection; 2737 changed |= BSS_CHANGED_ERP_CTS_PROT; 2738 } 2739 2740 if (use_short_preamble != bss_conf->use_short_preamble) { 2741 bss_conf->use_short_preamble = use_short_preamble; 2742 changed |= BSS_CHANGED_ERP_PREAMBLE; 2743 } 2744 2745 if (use_short_slot != bss_conf->use_short_slot) { 2746 bss_conf->use_short_slot = use_short_slot; 2747 changed |= BSS_CHANGED_ERP_SLOT; 2748 } 2749 2750 return changed; 2751 } 2752 2753 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2754 struct cfg80211_bss *cbss) 2755 { 2756 struct ieee80211_sub_if_data *sdata = link->sdata; 2757 struct ieee80211_bss_conf *bss_conf = link->conf; 2758 struct ieee80211_bss *bss = (void *)cbss->priv; 2759 u32 changed = BSS_CHANGED_QOS; 2760 2761 /* not really used in MLO */ 2762 sdata->u.mgd.beacon_timeout = 2763 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2764 bss_conf->beacon_int)); 2765 2766 changed |= ieee80211_handle_bss_capability(link, 2767 bss_conf->assoc_capability, 2768 bss->has_erp_value, 2769 bss->erp_value); 2770 2771 ieee80211_check_rate_mask(link); 2772 2773 link->u.mgd.bss = cbss; 2774 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2775 2776 if (sdata->vif.p2p || 2777 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2778 const struct cfg80211_bss_ies *ies; 2779 2780 rcu_read_lock(); 2781 ies = rcu_dereference(cbss->ies); 2782 if (ies) { 2783 int ret; 2784 2785 ret = cfg80211_get_p2p_attr( 2786 ies->data, ies->len, 2787 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2788 (u8 *) &bss_conf->p2p_noa_attr, 2789 sizeof(bss_conf->p2p_noa_attr)); 2790 if (ret >= 2) { 2791 link->u.mgd.p2p_noa_index = 2792 bss_conf->p2p_noa_attr.index; 2793 changed |= BSS_CHANGED_P2P_PS; 2794 } 2795 } 2796 rcu_read_unlock(); 2797 } 2798 2799 if (link->u.mgd.have_beacon) { 2800 bss_conf->beacon_rate = bss->beacon_rate; 2801 changed |= BSS_CHANGED_BEACON_INFO; 2802 } else { 2803 bss_conf->beacon_rate = NULL; 2804 } 2805 2806 /* Tell the driver to monitor connection quality (if supported) */ 2807 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2808 bss_conf->cqm_rssi_thold) 2809 changed |= BSS_CHANGED_CQM; 2810 2811 return changed; 2812 } 2813 2814 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2815 struct ieee80211_mgd_assoc_data *assoc_data, 2816 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2817 { 2818 struct ieee80211_local *local = sdata->local; 2819 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2820 u64 vif_changed = BSS_CHANGED_ASSOC; 2821 unsigned int link_id; 2822 2823 sdata->u.mgd.associated = true; 2824 2825 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2826 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2827 struct ieee80211_link_data *link; 2828 2829 if (!cbss || 2830 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2831 continue; 2832 2833 link = sdata_dereference(sdata->link[link_id], sdata); 2834 if (WARN_ON(!link)) 2835 return; 2836 2837 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2838 } 2839 2840 /* just to be sure */ 2841 ieee80211_stop_poll(sdata); 2842 2843 ieee80211_led_assoc(local, 1); 2844 2845 vif_cfg->assoc = 1; 2846 2847 /* Enable ARP filtering */ 2848 if (vif_cfg->arp_addr_cnt) 2849 vif_changed |= BSS_CHANGED_ARP_FILTER; 2850 2851 if (sdata->vif.valid_links) { 2852 for (link_id = 0; 2853 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2854 link_id++) { 2855 struct ieee80211_link_data *link; 2856 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2857 2858 if (!cbss || 2859 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2860 continue; 2861 2862 link = sdata_dereference(sdata->link[link_id], sdata); 2863 if (WARN_ON(!link)) 2864 return; 2865 2866 ieee80211_link_info_change_notify(sdata, link, 2867 changed[link_id]); 2868 2869 ieee80211_recalc_smps(sdata, link); 2870 } 2871 2872 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2873 } else { 2874 ieee80211_bss_info_change_notify(sdata, 2875 vif_changed | changed[0]); 2876 } 2877 2878 mutex_lock(&local->iflist_mtx); 2879 ieee80211_recalc_ps(local); 2880 mutex_unlock(&local->iflist_mtx); 2881 2882 /* leave this here to not change ordering in non-MLO cases */ 2883 if (!sdata->vif.valid_links) 2884 ieee80211_recalc_smps(sdata, &sdata->deflink); 2885 ieee80211_recalc_ps_vif(sdata); 2886 2887 netif_carrier_on(sdata->dev); 2888 } 2889 2890 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2891 u16 stype, u16 reason, bool tx, 2892 u8 *frame_buf) 2893 { 2894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2895 struct ieee80211_local *local = sdata->local; 2896 unsigned int link_id; 2897 u32 changed = 0; 2898 struct ieee80211_prep_tx_info info = { 2899 .subtype = stype, 2900 }; 2901 2902 sdata_assert_lock(sdata); 2903 2904 if (WARN_ON_ONCE(tx && !frame_buf)) 2905 return; 2906 2907 if (WARN_ON(!ifmgd->associated)) 2908 return; 2909 2910 ieee80211_stop_poll(sdata); 2911 2912 ifmgd->associated = false; 2913 2914 /* other links will be destroyed */ 2915 sdata->deflink.u.mgd.bss = NULL; 2916 2917 netif_carrier_off(sdata->dev); 2918 2919 /* 2920 * if we want to get out of ps before disassoc (why?) we have 2921 * to do it before sending disassoc, as otherwise the null-packet 2922 * won't be valid. 2923 */ 2924 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2925 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2926 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2927 } 2928 local->ps_sdata = NULL; 2929 2930 /* disable per-vif ps */ 2931 ieee80211_recalc_ps_vif(sdata); 2932 2933 /* make sure ongoing transmission finishes */ 2934 synchronize_net(); 2935 2936 /* 2937 * drop any frame before deauth/disassoc, this can be data or 2938 * management frame. Since we are disconnecting, we should not 2939 * insist sending these frames which can take time and delay 2940 * the disconnection and possible the roaming. 2941 */ 2942 if (tx) 2943 ieee80211_flush_queues(local, sdata, true); 2944 2945 /* deauthenticate/disassociate now */ 2946 if (tx || frame_buf) { 2947 /* 2948 * In multi channel scenarios guarantee that the virtual 2949 * interface is granted immediate airtime to transmit the 2950 * deauthentication frame by calling mgd_prepare_tx, if the 2951 * driver requested so. 2952 */ 2953 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2954 !sdata->deflink.u.mgd.have_beacon) { 2955 drv_mgd_prepare_tx(sdata->local, sdata, &info); 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 (!sdata->vif.valid_links) 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 (!sdata->vif.valid_links) 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 cancel_work_sync(&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 (!sdata->vif.valid_links) { 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 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 3034 3035 sdata->vif.bss_conf.dtim_period = 0; 3036 sdata->vif.bss_conf.beacon_rate = NULL; 3037 3038 sdata->deflink.u.mgd.have_beacon = false; 3039 sdata->deflink.u.mgd.tracking_signal_avg = false; 3040 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3041 3042 ifmgd->flags = 0; 3043 sdata->deflink.u.mgd.conn_flags = 0; 3044 mutex_lock(&local->mtx); 3045 3046 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3047 struct ieee80211_link_data *link; 3048 3049 link = sdata_dereference(sdata->link[link_id], sdata); 3050 if (!link) 3051 continue; 3052 ieee80211_link_release_channel(link); 3053 } 3054 3055 sdata->vif.bss_conf.csa_active = false; 3056 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3057 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3058 if (sdata->deflink.csa_block_tx) { 3059 ieee80211_wake_vif_queues(local, sdata, 3060 IEEE80211_QUEUE_STOP_REASON_CSA); 3061 sdata->deflink.csa_block_tx = false; 3062 } 3063 mutex_unlock(&local->mtx); 3064 3065 /* existing TX TSPEC sessions no longer exist */ 3066 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3067 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3068 3069 sdata->vif.bss_conf.pwr_reduction = 0; 3070 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3071 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3072 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3073 3074 ieee80211_vif_set_links(sdata, 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 mutex_lock(&local->mtx); 3083 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3084 goto out; 3085 3086 __ieee80211_stop_poll(sdata); 3087 3088 mutex_lock(&local->iflist_mtx); 3089 ieee80211_recalc_ps(local); 3090 mutex_unlock(&local->iflist_mtx); 3091 3092 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3093 goto out; 3094 3095 /* 3096 * We've received a probe response, but are not sure whether 3097 * we have or will be receiving any beacons or data, so let's 3098 * schedule the timers again, just in case. 3099 */ 3100 ieee80211_sta_reset_beacon_monitor(sdata); 3101 3102 mod_timer(&ifmgd->conn_mon_timer, 3103 round_jiffies_up(jiffies + 3104 IEEE80211_CONNECTION_IDLE_TIME)); 3105 out: 3106 mutex_unlock(&local->mtx); 3107 } 3108 3109 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3110 struct ieee80211_hdr *hdr, 3111 u16 tx_time) 3112 { 3113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3114 u16 tid; 3115 int ac; 3116 struct ieee80211_sta_tx_tspec *tx_tspec; 3117 unsigned long now = jiffies; 3118 3119 if (!ieee80211_is_data_qos(hdr->frame_control)) 3120 return; 3121 3122 tid = ieee80211_get_tid(hdr); 3123 ac = ieee80211_ac_from_tid(tid); 3124 tx_tspec = &ifmgd->tx_tspec[ac]; 3125 3126 if (likely(!tx_tspec->admitted_time)) 3127 return; 3128 3129 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3130 tx_tspec->consumed_tx_time = 0; 3131 tx_tspec->time_slice_start = now; 3132 3133 if (tx_tspec->downgraded) { 3134 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3135 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3136 } 3137 } 3138 3139 if (tx_tspec->downgraded) 3140 return; 3141 3142 tx_tspec->consumed_tx_time += tx_time; 3143 3144 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3145 tx_tspec->downgraded = true; 3146 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3147 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3148 } 3149 } 3150 3151 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3152 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3153 { 3154 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3155 3156 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3157 !sdata->u.mgd.probe_send_count) 3158 return; 3159 3160 if (ack) 3161 sdata->u.mgd.probe_send_count = 0; 3162 else 3163 sdata->u.mgd.nullfunc_failed = true; 3164 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3165 } 3166 3167 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3168 const u8 *src, const u8 *dst, 3169 const u8 *ssid, size_t ssid_len, 3170 struct ieee80211_channel *channel) 3171 { 3172 struct sk_buff *skb; 3173 3174 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3175 ssid, ssid_len, NULL, 0, 3176 IEEE80211_PROBE_FLAG_DIRECTED); 3177 if (skb) 3178 ieee80211_tx_skb(sdata, skb); 3179 } 3180 3181 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3182 { 3183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3184 u8 *dst = sdata->vif.cfg.ap_addr; 3185 u8 unicast_limit = max(1, max_probe_tries - 3); 3186 struct sta_info *sta; 3187 3188 if (WARN_ON(sdata->vif.valid_links)) 3189 return; 3190 3191 /* 3192 * Try sending broadcast probe requests for the last three 3193 * probe requests after the first ones failed since some 3194 * buggy APs only support broadcast probe requests. 3195 */ 3196 if (ifmgd->probe_send_count >= unicast_limit) 3197 dst = NULL; 3198 3199 /* 3200 * When the hardware reports an accurate Tx ACK status, it's 3201 * better to send a nullfunc frame instead of a probe request, 3202 * as it will kick us off the AP quickly if we aren't associated 3203 * anymore. The timeout will be reset if the frame is ACKed by 3204 * the AP. 3205 */ 3206 ifmgd->probe_send_count++; 3207 3208 if (dst) { 3209 mutex_lock(&sdata->local->sta_mtx); 3210 sta = sta_info_get(sdata, dst); 3211 if (!WARN_ON(!sta)) 3212 ieee80211_check_fast_rx(sta); 3213 mutex_unlock(&sdata->local->sta_mtx); 3214 } 3215 3216 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3217 ifmgd->nullfunc_failed = false; 3218 ieee80211_send_nullfunc(sdata->local, sdata, false); 3219 } else { 3220 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3221 sdata->vif.cfg.ssid, 3222 sdata->vif.cfg.ssid_len, 3223 sdata->deflink.u.mgd.bss->channel); 3224 } 3225 3226 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3227 run_again(sdata, ifmgd->probe_timeout); 3228 } 3229 3230 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3231 bool beacon) 3232 { 3233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3234 bool already = false; 3235 3236 if (WARN_ON_ONCE(sdata->vif.valid_links)) 3237 return; 3238 3239 if (!ieee80211_sdata_running(sdata)) 3240 return; 3241 3242 sdata_lock(sdata); 3243 3244 if (!ifmgd->associated) 3245 goto out; 3246 3247 mutex_lock(&sdata->local->mtx); 3248 3249 if (sdata->local->tmp_channel || sdata->local->scanning) { 3250 mutex_unlock(&sdata->local->mtx); 3251 goto out; 3252 } 3253 3254 if (sdata->local->suspending) { 3255 /* reschedule after resume */ 3256 mutex_unlock(&sdata->local->mtx); 3257 ieee80211_reset_ap_probe(sdata); 3258 goto out; 3259 } 3260 3261 if (beacon) { 3262 mlme_dbg_ratelimited(sdata, 3263 "detected beacon loss from AP (missed %d beacons) - probing\n", 3264 beacon_loss_count); 3265 3266 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3267 } 3268 3269 /* 3270 * The driver/our work has already reported this event or the 3271 * connection monitoring has kicked in and we have already sent 3272 * a probe request. Or maybe the AP died and the driver keeps 3273 * reporting until we disassociate... 3274 * 3275 * In either case we have to ignore the current call to this 3276 * function (except for setting the correct probe reason bit) 3277 * because otherwise we would reset the timer every time and 3278 * never check whether we received a probe response! 3279 */ 3280 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3281 already = true; 3282 3283 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3284 3285 mutex_unlock(&sdata->local->mtx); 3286 3287 if (already) 3288 goto out; 3289 3290 mutex_lock(&sdata->local->iflist_mtx); 3291 ieee80211_recalc_ps(sdata->local); 3292 mutex_unlock(&sdata->local->iflist_mtx); 3293 3294 ifmgd->probe_send_count = 0; 3295 ieee80211_mgd_probe_ap_send(sdata); 3296 out: 3297 sdata_unlock(sdata); 3298 } 3299 3300 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3301 struct ieee80211_vif *vif) 3302 { 3303 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3305 struct cfg80211_bss *cbss; 3306 struct sk_buff *skb; 3307 const struct element *ssid; 3308 int ssid_len; 3309 3310 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3311 sdata->vif.valid_links)) 3312 return NULL; 3313 3314 sdata_assert_lock(sdata); 3315 3316 if (ifmgd->associated) 3317 cbss = sdata->deflink.u.mgd.bss; 3318 else if (ifmgd->auth_data) 3319 cbss = ifmgd->auth_data->bss; 3320 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3321 cbss = ifmgd->assoc_data->link[0].bss; 3322 else 3323 return NULL; 3324 3325 rcu_read_lock(); 3326 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3327 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3328 "invalid SSID element (len=%d)", 3329 ssid ? ssid->datalen : -1)) 3330 ssid_len = 0; 3331 else 3332 ssid_len = ssid->datalen; 3333 3334 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3335 (u32) -1, cbss->channel, 3336 ssid->data, ssid_len, 3337 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3338 rcu_read_unlock(); 3339 3340 return skb; 3341 } 3342 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3343 3344 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3345 const u8 *buf, size_t len, bool tx, 3346 u16 reason, bool reconnect) 3347 { 3348 struct ieee80211_event event = { 3349 .type = MLME_EVENT, 3350 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3351 .u.mlme.reason = reason, 3352 }; 3353 3354 if (tx) 3355 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3356 else 3357 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3358 3359 drv_event_callback(sdata->local, sdata, &event); 3360 } 3361 3362 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3363 { 3364 struct ieee80211_local *local = sdata->local; 3365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3366 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3367 bool tx; 3368 3369 sdata_lock(sdata); 3370 if (!ifmgd->associated) { 3371 sdata_unlock(sdata); 3372 return; 3373 } 3374 3375 /* in MLO assume we have a link where we can TX the frame */ 3376 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3377 3378 if (!ifmgd->driver_disconnect) { 3379 unsigned int link_id; 3380 3381 /* 3382 * AP is probably out of range (or not reachable for another 3383 * reason) so remove the bss structs for that AP. In the case 3384 * of multi-link, it's not clear that all of them really are 3385 * out of range, but if they weren't the driver likely would 3386 * have switched to just have a single link active? 3387 */ 3388 for (link_id = 0; 3389 link_id < ARRAY_SIZE(sdata->link); 3390 link_id++) { 3391 struct ieee80211_link_data *link; 3392 3393 link = sdata_dereference(sdata->link[link_id], sdata); 3394 if (!link) 3395 continue; 3396 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3397 link->u.mgd.bss = NULL; 3398 } 3399 } 3400 3401 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3402 ifmgd->driver_disconnect ? 3403 WLAN_REASON_DEAUTH_LEAVING : 3404 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3405 tx, frame_buf); 3406 mutex_lock(&local->mtx); 3407 /* the other links will be destroyed */ 3408 sdata->vif.bss_conf.csa_active = false; 3409 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3410 if (sdata->deflink.csa_block_tx) { 3411 ieee80211_wake_vif_queues(local, sdata, 3412 IEEE80211_QUEUE_STOP_REASON_CSA); 3413 sdata->deflink.csa_block_tx = false; 3414 } 3415 mutex_unlock(&local->mtx); 3416 3417 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3418 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3419 ifmgd->reconnect); 3420 ifmgd->reconnect = false; 3421 3422 sdata_unlock(sdata); 3423 } 3424 3425 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3426 { 3427 struct ieee80211_sub_if_data *sdata = 3428 container_of(work, struct ieee80211_sub_if_data, 3429 u.mgd.beacon_connection_loss_work); 3430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3431 3432 if (ifmgd->connection_loss) { 3433 sdata_info(sdata, "Connection to AP %pM lost\n", 3434 sdata->vif.cfg.ap_addr); 3435 __ieee80211_disconnect(sdata); 3436 ifmgd->connection_loss = false; 3437 } else if (ifmgd->driver_disconnect) { 3438 sdata_info(sdata, 3439 "Driver requested disconnection from AP %pM\n", 3440 sdata->vif.cfg.ap_addr); 3441 __ieee80211_disconnect(sdata); 3442 ifmgd->driver_disconnect = false; 3443 } else { 3444 if (ifmgd->associated) 3445 sdata->deflink.u.mgd.beacon_loss_count++; 3446 ieee80211_mgd_probe_ap(sdata, true); 3447 } 3448 } 3449 3450 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3451 { 3452 struct ieee80211_sub_if_data *sdata = 3453 container_of(work, struct ieee80211_sub_if_data, 3454 u.mgd.csa_connection_drop_work); 3455 3456 __ieee80211_disconnect(sdata); 3457 } 3458 3459 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3460 { 3461 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3462 struct ieee80211_hw *hw = &sdata->local->hw; 3463 3464 trace_api_beacon_loss(sdata); 3465 3466 sdata->u.mgd.connection_loss = false; 3467 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3468 } 3469 EXPORT_SYMBOL(ieee80211_beacon_loss); 3470 3471 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3472 { 3473 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3474 struct ieee80211_hw *hw = &sdata->local->hw; 3475 3476 trace_api_connection_loss(sdata); 3477 3478 sdata->u.mgd.connection_loss = true; 3479 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3480 } 3481 EXPORT_SYMBOL(ieee80211_connection_loss); 3482 3483 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3484 { 3485 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3486 struct ieee80211_hw *hw = &sdata->local->hw; 3487 3488 trace_api_disconnect(sdata, reconnect); 3489 3490 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3491 return; 3492 3493 sdata->u.mgd.driver_disconnect = true; 3494 sdata->u.mgd.reconnect = reconnect; 3495 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3496 } 3497 EXPORT_SYMBOL(ieee80211_disconnect); 3498 3499 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3500 bool assoc) 3501 { 3502 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3503 3504 sdata_assert_lock(sdata); 3505 3506 if (!assoc) { 3507 /* 3508 * we are not authenticated yet, the only timer that could be 3509 * running is the timeout for the authentication response which 3510 * which is not relevant anymore. 3511 */ 3512 del_timer_sync(&sdata->u.mgd.timer); 3513 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3514 3515 /* other links are destroyed */ 3516 sdata->deflink.u.mgd.conn_flags = 0; 3517 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3518 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3519 BSS_CHANGED_BSSID); 3520 sdata->u.mgd.flags = 0; 3521 3522 mutex_lock(&sdata->local->mtx); 3523 ieee80211_link_release_channel(&sdata->deflink); 3524 ieee80211_vif_set_links(sdata, 0); 3525 mutex_unlock(&sdata->local->mtx); 3526 } 3527 3528 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3529 kfree(auth_data); 3530 sdata->u.mgd.auth_data = NULL; 3531 } 3532 3533 enum assoc_status { 3534 ASSOC_SUCCESS, 3535 ASSOC_REJECTED, 3536 ASSOC_TIMEOUT, 3537 ASSOC_ABANDON, 3538 }; 3539 3540 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3541 enum assoc_status status) 3542 { 3543 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3544 3545 sdata_assert_lock(sdata); 3546 3547 if (status != ASSOC_SUCCESS) { 3548 /* 3549 * we are not associated yet, the only timer that could be 3550 * running is the timeout for the association response which 3551 * which is not relevant anymore. 3552 */ 3553 del_timer_sync(&sdata->u.mgd.timer); 3554 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3555 3556 sdata->deflink.u.mgd.conn_flags = 0; 3557 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3558 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3559 BSS_CHANGED_BSSID); 3560 sdata->u.mgd.flags = 0; 3561 sdata->vif.bss_conf.mu_mimo_owner = false; 3562 3563 if (status != ASSOC_REJECTED) { 3564 struct cfg80211_assoc_failure data = { 3565 .timeout = status == ASSOC_TIMEOUT, 3566 }; 3567 int i; 3568 3569 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3570 ARRAY_SIZE(assoc_data->link)); 3571 3572 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3573 data.bss[i] = assoc_data->link[i].bss; 3574 3575 if (sdata->vif.valid_links) 3576 data.ap_mld_addr = assoc_data->ap_addr; 3577 3578 cfg80211_assoc_failure(sdata->dev, &data); 3579 } 3580 3581 mutex_lock(&sdata->local->mtx); 3582 ieee80211_link_release_channel(&sdata->deflink); 3583 ieee80211_vif_set_links(sdata, 0); 3584 mutex_unlock(&sdata->local->mtx); 3585 } 3586 3587 kfree(assoc_data); 3588 sdata->u.mgd.assoc_data = NULL; 3589 } 3590 3591 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3592 struct ieee80211_mgmt *mgmt, size_t len) 3593 { 3594 struct ieee80211_local *local = sdata->local; 3595 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3596 const struct element *challenge; 3597 u8 *pos; 3598 u32 tx_flags = 0; 3599 struct ieee80211_prep_tx_info info = { 3600 .subtype = IEEE80211_STYPE_AUTH, 3601 }; 3602 3603 pos = mgmt->u.auth.variable; 3604 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3605 len - (pos - (u8 *)mgmt)); 3606 if (!challenge) 3607 return; 3608 auth_data->expected_transaction = 4; 3609 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3610 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3611 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3612 IEEE80211_TX_INTFL_MLME_CONN_TX; 3613 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3614 (void *)challenge, 3615 challenge->datalen + sizeof(*challenge), 3616 auth_data->ap_addr, auth_data->ap_addr, 3617 auth_data->key, auth_data->key_len, 3618 auth_data->key_idx, tx_flags); 3619 } 3620 3621 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3622 { 3623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3624 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3625 struct sta_info *sta; 3626 bool result = true; 3627 3628 sdata_info(sdata, "authenticated\n"); 3629 ifmgd->auth_data->done = true; 3630 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3631 ifmgd->auth_data->timeout_started = true; 3632 run_again(sdata, ifmgd->auth_data->timeout); 3633 3634 /* move station state to auth */ 3635 mutex_lock(&sdata->local->sta_mtx); 3636 sta = sta_info_get(sdata, ap_addr); 3637 if (!sta) { 3638 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3639 result = false; 3640 goto out; 3641 } 3642 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3643 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3644 result = false; 3645 goto out; 3646 } 3647 3648 out: 3649 mutex_unlock(&sdata->local->sta_mtx); 3650 return result; 3651 } 3652 3653 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3654 struct ieee80211_mgmt *mgmt, size_t len) 3655 { 3656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3657 u16 auth_alg, auth_transaction, status_code; 3658 struct ieee80211_event event = { 3659 .type = MLME_EVENT, 3660 .u.mlme.data = AUTH_EVENT, 3661 }; 3662 struct ieee80211_prep_tx_info info = { 3663 .subtype = IEEE80211_STYPE_AUTH, 3664 }; 3665 3666 sdata_assert_lock(sdata); 3667 3668 if (len < 24 + 6) 3669 return; 3670 3671 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3672 return; 3673 3674 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3675 return; 3676 3677 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3678 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3679 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3680 3681 if (auth_alg != ifmgd->auth_data->algorithm || 3682 (auth_alg != WLAN_AUTH_SAE && 3683 auth_transaction != ifmgd->auth_data->expected_transaction) || 3684 (auth_alg == WLAN_AUTH_SAE && 3685 (auth_transaction < ifmgd->auth_data->expected_transaction || 3686 auth_transaction > 2))) { 3687 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3688 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3689 auth_transaction, 3690 ifmgd->auth_data->expected_transaction); 3691 goto notify_driver; 3692 } 3693 3694 if (status_code != WLAN_STATUS_SUCCESS) { 3695 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3696 3697 if (auth_alg == WLAN_AUTH_SAE && 3698 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3699 (auth_transaction == 1 && 3700 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3701 status_code == WLAN_STATUS_SAE_PK)))) { 3702 /* waiting for userspace now */ 3703 ifmgd->auth_data->waiting = true; 3704 ifmgd->auth_data->timeout = 3705 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3706 ifmgd->auth_data->timeout_started = true; 3707 run_again(sdata, ifmgd->auth_data->timeout); 3708 goto notify_driver; 3709 } 3710 3711 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3712 mgmt->sa, status_code); 3713 ieee80211_destroy_auth_data(sdata, false); 3714 event.u.mlme.status = MLME_DENIED; 3715 event.u.mlme.reason = status_code; 3716 drv_event_callback(sdata->local, sdata, &event); 3717 goto notify_driver; 3718 } 3719 3720 switch (ifmgd->auth_data->algorithm) { 3721 case WLAN_AUTH_OPEN: 3722 case WLAN_AUTH_LEAP: 3723 case WLAN_AUTH_FT: 3724 case WLAN_AUTH_SAE: 3725 case WLAN_AUTH_FILS_SK: 3726 case WLAN_AUTH_FILS_SK_PFS: 3727 case WLAN_AUTH_FILS_PK: 3728 break; 3729 case WLAN_AUTH_SHARED_KEY: 3730 if (ifmgd->auth_data->expected_transaction != 4) { 3731 ieee80211_auth_challenge(sdata, mgmt, len); 3732 /* need another frame */ 3733 return; 3734 } 3735 break; 3736 default: 3737 WARN_ONCE(1, "invalid auth alg %d", 3738 ifmgd->auth_data->algorithm); 3739 goto notify_driver; 3740 } 3741 3742 event.u.mlme.status = MLME_SUCCESS; 3743 info.success = 1; 3744 drv_event_callback(sdata->local, sdata, &event); 3745 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3746 (auth_transaction == 2 && 3747 ifmgd->auth_data->expected_transaction == 2)) { 3748 if (!ieee80211_mark_sta_auth(sdata)) 3749 return; /* ignore frame -- wait for timeout */ 3750 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3751 auth_transaction == 2) { 3752 sdata_info(sdata, "SAE peer confirmed\n"); 3753 ifmgd->auth_data->peer_confirmed = true; 3754 } 3755 3756 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3757 notify_driver: 3758 drv_mgd_complete_tx(sdata->local, sdata, &info); 3759 } 3760 3761 #define case_WLAN(type) \ 3762 case WLAN_REASON_##type: return #type 3763 3764 const char *ieee80211_get_reason_code_string(u16 reason_code) 3765 { 3766 switch (reason_code) { 3767 case_WLAN(UNSPECIFIED); 3768 case_WLAN(PREV_AUTH_NOT_VALID); 3769 case_WLAN(DEAUTH_LEAVING); 3770 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3771 case_WLAN(DISASSOC_AP_BUSY); 3772 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3773 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3774 case_WLAN(DISASSOC_STA_HAS_LEFT); 3775 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3776 case_WLAN(DISASSOC_BAD_POWER); 3777 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3778 case_WLAN(INVALID_IE); 3779 case_WLAN(MIC_FAILURE); 3780 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3781 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3782 case_WLAN(IE_DIFFERENT); 3783 case_WLAN(INVALID_GROUP_CIPHER); 3784 case_WLAN(INVALID_PAIRWISE_CIPHER); 3785 case_WLAN(INVALID_AKMP); 3786 case_WLAN(UNSUPP_RSN_VERSION); 3787 case_WLAN(INVALID_RSN_IE_CAP); 3788 case_WLAN(IEEE8021X_FAILED); 3789 case_WLAN(CIPHER_SUITE_REJECTED); 3790 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3791 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3792 case_WLAN(DISASSOC_LOW_ACK); 3793 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3794 case_WLAN(QSTA_LEAVE_QBSS); 3795 case_WLAN(QSTA_NOT_USE); 3796 case_WLAN(QSTA_REQUIRE_SETUP); 3797 case_WLAN(QSTA_TIMEOUT); 3798 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3799 case_WLAN(MESH_PEER_CANCELED); 3800 case_WLAN(MESH_MAX_PEERS); 3801 case_WLAN(MESH_CONFIG); 3802 case_WLAN(MESH_CLOSE); 3803 case_WLAN(MESH_MAX_RETRIES); 3804 case_WLAN(MESH_CONFIRM_TIMEOUT); 3805 case_WLAN(MESH_INVALID_GTK); 3806 case_WLAN(MESH_INCONSISTENT_PARAM); 3807 case_WLAN(MESH_INVALID_SECURITY); 3808 case_WLAN(MESH_PATH_ERROR); 3809 case_WLAN(MESH_PATH_NOFORWARD); 3810 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3811 case_WLAN(MAC_EXISTS_IN_MBSS); 3812 case_WLAN(MESH_CHAN_REGULATORY); 3813 case_WLAN(MESH_CHAN); 3814 default: return "<unknown>"; 3815 } 3816 } 3817 3818 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3819 struct ieee80211_mgmt *mgmt, size_t len) 3820 { 3821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3822 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3823 3824 sdata_assert_lock(sdata); 3825 3826 if (len < 24 + 2) 3827 return; 3828 3829 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3830 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3831 return; 3832 } 3833 3834 if (ifmgd->associated && 3835 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3836 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3837 sdata->vif.cfg.ap_addr, reason_code, 3838 ieee80211_get_reason_code_string(reason_code)); 3839 3840 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3841 3842 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3843 reason_code, false); 3844 return; 3845 } 3846 3847 if (ifmgd->assoc_data && 3848 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3849 sdata_info(sdata, 3850 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3851 ifmgd->assoc_data->ap_addr, reason_code, 3852 ieee80211_get_reason_code_string(reason_code)); 3853 3854 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3855 3856 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3857 return; 3858 } 3859 } 3860 3861 3862 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3863 struct ieee80211_mgmt *mgmt, size_t len) 3864 { 3865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3866 u16 reason_code; 3867 3868 sdata_assert_lock(sdata); 3869 3870 if (len < 24 + 2) 3871 return; 3872 3873 if (!ifmgd->associated || 3874 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3875 return; 3876 3877 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3878 3879 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3880 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3881 return; 3882 } 3883 3884 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3885 sdata->vif.cfg.ap_addr, reason_code, 3886 ieee80211_get_reason_code_string(reason_code)); 3887 3888 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3889 3890 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3891 false); 3892 } 3893 3894 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3895 u8 *supp_rates, unsigned int supp_rates_len, 3896 u32 *rates, u32 *basic_rates, 3897 bool *have_higher_than_11mbit, 3898 int *min_rate, int *min_rate_index, 3899 int shift) 3900 { 3901 int i, j; 3902 3903 for (i = 0; i < supp_rates_len; i++) { 3904 int rate = supp_rates[i] & 0x7f; 3905 bool is_basic = !!(supp_rates[i] & 0x80); 3906 3907 if ((rate * 5 * (1 << shift)) > 110) 3908 *have_higher_than_11mbit = true; 3909 3910 /* 3911 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3912 * since they're not rates. 3913 * 3914 * Note: Even though the membership selector and the basic 3915 * rate flag share the same bit, they are not exactly 3916 * the same. 3917 */ 3918 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3919 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3920 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3921 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3922 continue; 3923 3924 for (j = 0; j < sband->n_bitrates; j++) { 3925 struct ieee80211_rate *br; 3926 int brate; 3927 3928 br = &sband->bitrates[j]; 3929 3930 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3931 if (brate == rate) { 3932 *rates |= BIT(j); 3933 if (is_basic) 3934 *basic_rates |= BIT(j); 3935 if ((rate * 5) < *min_rate) { 3936 *min_rate = rate * 5; 3937 *min_rate_index = j; 3938 } 3939 break; 3940 } 3941 } 3942 } 3943 } 3944 3945 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3946 struct ieee80211_supported_band *sband, 3947 const struct link_sta_info *link_sta, 3948 const struct ieee802_11_elems *elems) 3949 { 3950 const struct ieee80211_sta_he_cap *own_he_cap = 3951 ieee80211_get_he_iftype_cap(sband, 3952 ieee80211_vif_type_p2p(&sdata->vif)); 3953 3954 if (elems->ext_capab_len < 10) 3955 return false; 3956 3957 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3958 return false; 3959 3960 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3961 IEEE80211_HE_MAC_CAP0_TWT_RES && 3962 own_he_cap && 3963 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3964 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3965 } 3966 3967 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3968 struct ieee80211_supported_band *sband, 3969 struct ieee80211_link_data *link, 3970 struct link_sta_info *link_sta, 3971 struct ieee802_11_elems *elems) 3972 { 3973 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3974 3975 if (link->conf->twt_requester != twt) { 3976 link->conf->twt_requester = twt; 3977 return BSS_CHANGED_TWT; 3978 } 3979 return 0; 3980 } 3981 3982 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3983 struct ieee80211_bss_conf *bss_conf, 3984 struct ieee80211_supported_band *sband, 3985 struct link_sta_info *link_sta) 3986 { 3987 const struct ieee80211_sta_he_cap *own_he_cap = 3988 ieee80211_get_he_iftype_cap(sband, 3989 ieee80211_vif_type_p2p(&sdata->vif)); 3990 3991 return bss_conf->he_support && 3992 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3993 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3994 own_he_cap && 3995 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3996 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3997 } 3998 3999 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4000 struct link_sta_info *link_sta, 4001 struct cfg80211_bss *cbss, 4002 struct ieee80211_mgmt *mgmt, 4003 const u8 *elem_start, 4004 unsigned int elem_len, 4005 u64 *changed) 4006 { 4007 struct ieee80211_sub_if_data *sdata = link->sdata; 4008 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4009 struct ieee80211_bss_conf *bss_conf = link->conf; 4010 struct ieee80211_local *local = sdata->local; 4011 unsigned int link_id = link->link_id; 4012 struct ieee80211_elems_parse_params parse_params = { 4013 .start = elem_start, 4014 .len = elem_len, 4015 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4016 .from_ap = true, 4017 }; 4018 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4019 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4020 const struct cfg80211_bss_ies *bss_ies = NULL; 4021 struct ieee80211_supported_band *sband; 4022 struct ieee802_11_elems *elems; 4023 u16 capab_info; 4024 bool ret; 4025 4026 elems = ieee802_11_parse_elems_full(&parse_params); 4027 if (!elems) 4028 return false; 4029 4030 if (link_id == assoc_data->assoc_link_id) { 4031 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4032 4033 /* 4034 * we should not get to this flow unless the association was 4035 * successful, so set the status directly to success 4036 */ 4037 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4038 } else if (!elems->prof) { 4039 ret = false; 4040 goto out; 4041 } else { 4042 const u8 *ptr = elems->prof->variable + 4043 elems->prof->sta_info_len - 1; 4044 4045 /* 4046 * During parsing, we validated that these fields exist, 4047 * otherwise elems->prof would have been set to NULL. 4048 */ 4049 capab_info = get_unaligned_le16(ptr); 4050 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4051 4052 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4053 link_info(link, "association response status code=%u\n", 4054 assoc_data->link[link_id].status); 4055 ret = true; 4056 goto out; 4057 } 4058 } 4059 4060 if (!is_s1g && !elems->supp_rates) { 4061 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4062 ret = false; 4063 goto out; 4064 } 4065 4066 link->u.mgd.tdls_chan_switch_prohibited = 4067 elems->ext_capab && elems->ext_capab_len >= 5 && 4068 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4069 4070 /* 4071 * Some APs are erroneously not including some information in their 4072 * (re)association response frames. Try to recover by using the data 4073 * from the beacon or probe response. This seems to afflict mobile 4074 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4075 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4076 */ 4077 if (!is_6ghz && 4078 ((assoc_data->wmm && !elems->wmm_param) || 4079 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4080 (!elems->ht_cap_elem || !elems->ht_operation)) || 4081 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4082 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4083 const struct cfg80211_bss_ies *ies; 4084 struct ieee802_11_elems *bss_elems; 4085 4086 rcu_read_lock(); 4087 ies = rcu_dereference(cbss->ies); 4088 if (ies) 4089 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4090 GFP_ATOMIC); 4091 rcu_read_unlock(); 4092 if (!bss_ies) { 4093 ret = false; 4094 goto out; 4095 } 4096 4097 parse_params.start = bss_ies->data; 4098 parse_params.len = bss_ies->len; 4099 parse_params.bss = cbss; 4100 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4101 if (!bss_elems) { 4102 ret = false; 4103 goto out; 4104 } 4105 4106 if (assoc_data->wmm && 4107 !elems->wmm_param && bss_elems->wmm_param) { 4108 elems->wmm_param = bss_elems->wmm_param; 4109 sdata_info(sdata, 4110 "AP bug: WMM param missing from AssocResp\n"); 4111 } 4112 4113 /* 4114 * Also check if we requested HT/VHT, otherwise the AP doesn't 4115 * have to include the IEs in the (re)association response. 4116 */ 4117 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4118 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4119 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4120 sdata_info(sdata, 4121 "AP bug: HT capability missing from AssocResp\n"); 4122 } 4123 if (!elems->ht_operation && bss_elems->ht_operation && 4124 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4125 elems->ht_operation = bss_elems->ht_operation; 4126 sdata_info(sdata, 4127 "AP bug: HT operation missing from AssocResp\n"); 4128 } 4129 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4130 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4131 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4132 sdata_info(sdata, 4133 "AP bug: VHT capa missing from AssocResp\n"); 4134 } 4135 if (!elems->vht_operation && bss_elems->vht_operation && 4136 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4137 elems->vht_operation = bss_elems->vht_operation; 4138 sdata_info(sdata, 4139 "AP bug: VHT operation missing from AssocResp\n"); 4140 } 4141 4142 kfree(bss_elems); 4143 } 4144 4145 /* 4146 * We previously checked these in the beacon/probe response, so 4147 * they should be present here. This is just a safety net. 4148 */ 4149 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4150 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4151 sdata_info(sdata, 4152 "HT AP is missing WMM params or HT capability/operation\n"); 4153 ret = false; 4154 goto out; 4155 } 4156 4157 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4158 (!elems->vht_cap_elem || !elems->vht_operation)) { 4159 sdata_info(sdata, 4160 "VHT AP is missing VHT capability/operation\n"); 4161 ret = false; 4162 goto out; 4163 } 4164 4165 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4166 !elems->he_6ghz_capa) { 4167 sdata_info(sdata, 4168 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4169 ret = false; 4170 goto out; 4171 } 4172 4173 if (WARN_ON(!link->conf->chandef.chan)) { 4174 ret = false; 4175 goto out; 4176 } 4177 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4178 4179 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4180 (!elems->he_cap || !elems->he_operation)) { 4181 sdata_info(sdata, 4182 "HE AP is missing HE capability/operation\n"); 4183 ret = false; 4184 goto out; 4185 } 4186 4187 /* Set up internal HT/VHT capabilities */ 4188 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4189 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4190 elems->ht_cap_elem, 4191 link_sta); 4192 4193 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4194 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4195 elems->vht_cap_elem, 4196 link_sta); 4197 4198 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4199 elems->he_cap) { 4200 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4201 elems->he_cap, 4202 elems->he_cap_len, 4203 elems->he_6ghz_capa, 4204 link_sta); 4205 4206 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4207 if (elems->rsnx && elems->rsnx_len && 4208 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4209 wiphy_ext_feature_isset(local->hw.wiphy, 4210 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4211 bss_conf->twt_protected = true; 4212 else 4213 bss_conf->twt_protected = false; 4214 4215 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4216 link_sta, elems); 4217 4218 if (elems->eht_operation && elems->eht_cap && 4219 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4220 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4221 elems->he_cap, 4222 elems->he_cap_len, 4223 elems->eht_cap, 4224 elems->eht_cap_len, 4225 link_sta); 4226 4227 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4228 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4229 } else { 4230 bss_conf->eht_support = false; 4231 } 4232 } else { 4233 bss_conf->he_support = false; 4234 bss_conf->twt_requester = false; 4235 bss_conf->twt_protected = false; 4236 bss_conf->eht_support = false; 4237 } 4238 4239 bss_conf->twt_broadcast = 4240 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4241 4242 if (bss_conf->he_support) { 4243 bss_conf->he_bss_color.color = 4244 le32_get_bits(elems->he_operation->he_oper_params, 4245 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4246 bss_conf->he_bss_color.partial = 4247 le32_get_bits(elems->he_operation->he_oper_params, 4248 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4249 bss_conf->he_bss_color.enabled = 4250 !le32_get_bits(elems->he_operation->he_oper_params, 4251 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4252 4253 if (bss_conf->he_bss_color.enabled) 4254 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4255 4256 bss_conf->htc_trig_based_pkt_ext = 4257 le32_get_bits(elems->he_operation->he_oper_params, 4258 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4259 bss_conf->frame_time_rts_th = 4260 le32_get_bits(elems->he_operation->he_oper_params, 4261 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4262 4263 bss_conf->uora_exists = !!elems->uora_element; 4264 if (elems->uora_element) 4265 bss_conf->uora_ocw_range = elems->uora_element[0]; 4266 4267 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4268 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4269 /* TODO: OPEN: what happens if BSS color disable is set? */ 4270 } 4271 4272 if (cbss->transmitted_bss) { 4273 bss_conf->nontransmitted = true; 4274 ether_addr_copy(bss_conf->transmitter_bssid, 4275 cbss->transmitted_bss->bssid); 4276 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4277 bss_conf->bssid_index = cbss->bssid_index; 4278 } 4279 4280 /* 4281 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4282 * in their association response, so ignore that data for our own 4283 * configuration. If it changed since the last beacon, we'll get the 4284 * next beacon and update then. 4285 */ 4286 4287 /* 4288 * If an operating mode notification IE is present, override the 4289 * NSS calculation (that would be done in rate_control_rate_init()) 4290 * and use the # of streams from that element. 4291 */ 4292 if (elems->opmode_notif && 4293 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4294 u8 nss; 4295 4296 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4297 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4298 nss += 1; 4299 link_sta->pub->rx_nss = nss; 4300 } 4301 4302 /* 4303 * Always handle WMM once after association regardless 4304 * of the first value the AP uses. Setting -1 here has 4305 * that effect because the AP values is an unsigned 4306 * 4-bit value. 4307 */ 4308 link->u.mgd.wmm_last_param_set = -1; 4309 link->u.mgd.mu_edca_last_param_set = -1; 4310 4311 if (link->u.mgd.disable_wmm_tracking) { 4312 ieee80211_set_wmm_default(link, false, false); 4313 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4314 elems->wmm_param_len, 4315 elems->mu_edca_param_set)) { 4316 /* still enable QoS since we might have HT/VHT */ 4317 ieee80211_set_wmm_default(link, false, true); 4318 /* disable WMM tracking in this case to disable 4319 * tracking WMM parameter changes in the beacon if 4320 * the parameters weren't actually valid. Doing so 4321 * avoids changing parameters very strangely when 4322 * the AP is going back and forth between valid and 4323 * invalid parameters. 4324 */ 4325 link->u.mgd.disable_wmm_tracking = true; 4326 } 4327 4328 if (elems->max_idle_period_ie) { 4329 bss_conf->max_idle_period = 4330 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4331 bss_conf->protected_keep_alive = 4332 !!(elems->max_idle_period_ie->idle_options & 4333 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4334 *changed |= BSS_CHANGED_KEEP_ALIVE; 4335 } else { 4336 bss_conf->max_idle_period = 0; 4337 bss_conf->protected_keep_alive = false; 4338 } 4339 4340 /* set assoc capability (AID was already set earlier), 4341 * ieee80211_set_associated() will tell the driver */ 4342 bss_conf->assoc_capability = capab_info; 4343 4344 ret = true; 4345 out: 4346 kfree(elems); 4347 kfree(bss_ies); 4348 return ret; 4349 } 4350 4351 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4352 struct sta_info *sta, 4353 struct link_sta_info *link_sta, 4354 struct cfg80211_bss *cbss) 4355 { 4356 struct ieee80211_sub_if_data *sdata = link->sdata; 4357 struct ieee80211_local *local = sdata->local; 4358 struct ieee80211_bss *bss = (void *)cbss->priv; 4359 u32 rates = 0, basic_rates = 0; 4360 bool have_higher_than_11mbit = false; 4361 int min_rate = INT_MAX, min_rate_index = -1; 4362 /* this is clearly wrong for MLO but we'll just remove it later */ 4363 int shift = ieee80211_vif_get_shift(&sdata->vif); 4364 struct ieee80211_supported_band *sband; 4365 4366 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4367 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4368 4369 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4370 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4371 ieee80211_s1g_sta_rate_init(sta); 4372 return 0; 4373 } 4374 4375 sband = local->hw.wiphy->bands[cbss->channel->band]; 4376 4377 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4378 &rates, &basic_rates, &have_higher_than_11mbit, 4379 &min_rate, &min_rate_index, shift); 4380 4381 /* 4382 * This used to be a workaround for basic rates missing 4383 * in the association response frame. Now that we no 4384 * longer use the basic rates from there, it probably 4385 * doesn't happen any more, but keep the workaround so 4386 * in case some *other* APs are buggy in different ways 4387 * we can connect -- with a warning. 4388 * Allow this workaround only in case the AP provided at least 4389 * one rate. 4390 */ 4391 if (min_rate_index < 0) { 4392 link_info(link, "No legacy rates in association response\n"); 4393 return -EINVAL; 4394 } else if (!basic_rates) { 4395 link_info(link, "No basic rates, using min rate instead\n"); 4396 basic_rates = BIT(min_rate_index); 4397 } 4398 4399 if (rates) 4400 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4401 else 4402 link_info(link, "No rates found, keeping mandatory only\n"); 4403 4404 link->conf->basic_rates = basic_rates; 4405 4406 /* cf. IEEE 802.11 9.2.12 */ 4407 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4408 have_higher_than_11mbit; 4409 4410 return 0; 4411 } 4412 4413 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4414 struct cfg80211_bss *cbss) 4415 { 4416 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4417 const struct element *ht_cap_elem, *vht_cap_elem; 4418 const struct cfg80211_bss_ies *ies; 4419 const struct ieee80211_ht_cap *ht_cap; 4420 const struct ieee80211_vht_cap *vht_cap; 4421 const struct ieee80211_he_cap_elem *he_cap; 4422 const struct element *he_cap_elem; 4423 u16 mcs_80_map, mcs_160_map; 4424 int i, mcs_nss_size; 4425 bool support_160; 4426 u8 chains = 1; 4427 4428 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4429 return chains; 4430 4431 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4432 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4433 ht_cap = (void *)ht_cap_elem->data; 4434 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4435 /* 4436 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4437 * "Tx Unequal Modulation Supported" fields. 4438 */ 4439 } 4440 4441 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4442 return chains; 4443 4444 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4445 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4446 u8 nss; 4447 u16 tx_mcs_map; 4448 4449 vht_cap = (void *)vht_cap_elem->data; 4450 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4451 for (nss = 8; nss > 0; nss--) { 4452 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4453 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4454 break; 4455 } 4456 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4457 chains = max(chains, nss); 4458 } 4459 4460 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4461 return chains; 4462 4463 ies = rcu_dereference(cbss->ies); 4464 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4465 ies->data, ies->len); 4466 4467 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4468 return chains; 4469 4470 /* skip one byte ext_tag_id */ 4471 he_cap = (void *)(he_cap_elem->data + 1); 4472 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4473 4474 /* invalid HE IE */ 4475 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4476 return chains; 4477 4478 /* mcs_nss is right after he_cap info */ 4479 he_mcs_nss_supp = (void *)(he_cap + 1); 4480 4481 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4482 4483 for (i = 7; i >= 0; i--) { 4484 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4485 4486 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4487 chains = max_t(u8, chains, i + 1); 4488 break; 4489 } 4490 } 4491 4492 support_160 = he_cap->phy_cap_info[0] & 4493 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4494 4495 if (!support_160) 4496 return chains; 4497 4498 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4499 for (i = 7; i >= 0; i--) { 4500 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4501 4502 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4503 chains = max_t(u8, chains, i + 1); 4504 break; 4505 } 4506 } 4507 4508 return chains; 4509 } 4510 4511 static bool 4512 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4513 const struct cfg80211_bss_ies *ies, 4514 const struct ieee80211_he_operation *he_op) 4515 { 4516 const struct element *he_cap_elem; 4517 const struct ieee80211_he_cap_elem *he_cap; 4518 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4519 u16 mcs_80_map_tx, mcs_80_map_rx; 4520 u16 ap_min_req_set; 4521 int mcs_nss_size; 4522 int nss; 4523 4524 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4525 ies->data, ies->len); 4526 4527 if (!he_cap_elem) 4528 return false; 4529 4530 /* invalid HE IE */ 4531 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4532 sdata_info(sdata, 4533 "Invalid HE elem, Disable HE\n"); 4534 return false; 4535 } 4536 4537 /* skip one byte ext_tag_id */ 4538 he_cap = (void *)(he_cap_elem->data + 1); 4539 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4540 4541 /* invalid HE IE */ 4542 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4543 sdata_info(sdata, 4544 "Invalid HE elem with nss size, Disable HE\n"); 4545 return false; 4546 } 4547 4548 /* mcs_nss is right after he_cap info */ 4549 he_mcs_nss_supp = (void *)(he_cap + 1); 4550 4551 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4552 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4553 4554 /* P802.11-REVme/D0.3 4555 * 27.1.1 Introduction to the HE PHY 4556 * ... 4557 * An HE STA shall support the following features: 4558 * ... 4559 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4560 * supported channel widths for HE SU PPDUs 4561 */ 4562 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4563 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4564 sdata_info(sdata, 4565 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4566 mcs_80_map_tx, mcs_80_map_rx); 4567 return false; 4568 } 4569 4570 if (!he_op) 4571 return true; 4572 4573 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4574 4575 /* 4576 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4577 * zeroes, which is nonsense, and completely inconsistent with itself 4578 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4579 */ 4580 if (!ap_min_req_set) 4581 return true; 4582 4583 /* make sure the AP is consistent with itself 4584 * 4585 * P802.11-REVme/D0.3 4586 * 26.17.1 Basic HE BSS operation 4587 * 4588 * A STA that is operating in an HE BSS shall be able to receive and 4589 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4590 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4591 * MLME-START.request primitive and shall be able to receive at each of 4592 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4593 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4594 * primitive 4595 */ 4596 for (nss = 8; nss > 0; nss--) { 4597 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4598 u8 ap_rx_val; 4599 u8 ap_tx_val; 4600 4601 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4602 continue; 4603 4604 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4605 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4606 4607 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4608 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4609 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4610 sdata_info(sdata, 4611 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4612 nss, ap_rx_val, ap_rx_val, ap_op_val); 4613 return false; 4614 } 4615 } 4616 4617 return true; 4618 } 4619 4620 static bool 4621 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4622 struct ieee80211_supported_band *sband, 4623 const struct ieee80211_he_operation *he_op) 4624 { 4625 const struct ieee80211_sta_he_cap *sta_he_cap = 4626 ieee80211_get_he_iftype_cap(sband, 4627 ieee80211_vif_type_p2p(&sdata->vif)); 4628 u16 ap_min_req_set; 4629 int i; 4630 4631 if (!sta_he_cap || !he_op) 4632 return false; 4633 4634 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4635 4636 /* 4637 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4638 * zeroes, which is nonsense, and completely inconsistent with itself 4639 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4640 */ 4641 if (!ap_min_req_set) 4642 return true; 4643 4644 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4645 for (i = 0; i < 3; i++) { 4646 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4647 &sta_he_cap->he_mcs_nss_supp; 4648 u16 sta_mcs_map_rx = 4649 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4650 u16 sta_mcs_map_tx = 4651 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4652 u8 nss; 4653 bool verified = true; 4654 4655 /* 4656 * For each band there is a maximum of 8 spatial streams 4657 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4658 * of 2 bits per NSS (1-8), with the values defined in enum 4659 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4660 * capabilities aren't less than the AP's minimum requirements 4661 * for this HE BSS per SS. 4662 * It is enough to find one such band that meets the reqs. 4663 */ 4664 for (nss = 8; nss > 0; nss--) { 4665 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4666 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4667 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4668 4669 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4670 continue; 4671 4672 /* 4673 * Make sure the HE AP doesn't require MCSs that aren't 4674 * supported by the client as required by spec 4675 * 4676 * P802.11-REVme/D0.3 4677 * 26.17.1 Basic HE BSS operation 4678 * 4679 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4680 * a BSS, unless it supports (i.e., is able to both transmit and 4681 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4682 * HE-MCS and NSS set. 4683 */ 4684 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4685 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4686 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4687 verified = false; 4688 break; 4689 } 4690 } 4691 4692 if (verified) 4693 return true; 4694 } 4695 4696 /* If here, STA doesn't meet AP's HE min requirements */ 4697 return false; 4698 } 4699 4700 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4701 struct ieee80211_link_data *link, 4702 struct cfg80211_bss *cbss, 4703 ieee80211_conn_flags_t *conn_flags) 4704 { 4705 struct ieee80211_local *local = sdata->local; 4706 const struct ieee80211_ht_cap *ht_cap = NULL; 4707 const struct ieee80211_ht_operation *ht_oper = NULL; 4708 const struct ieee80211_vht_operation *vht_oper = NULL; 4709 const struct ieee80211_he_operation *he_oper = NULL; 4710 const struct ieee80211_eht_operation *eht_oper = NULL; 4711 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4712 struct ieee80211_supported_band *sband; 4713 struct cfg80211_chan_def chandef; 4714 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4715 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4716 struct ieee80211_bss *bss = (void *)cbss->priv; 4717 struct ieee80211_elems_parse_params parse_params = { 4718 .bss = cbss, 4719 .link_id = -1, 4720 .from_ap = true, 4721 }; 4722 struct ieee802_11_elems *elems; 4723 const struct cfg80211_bss_ies *ies; 4724 int ret; 4725 u32 i; 4726 bool have_80mhz; 4727 4728 rcu_read_lock(); 4729 4730 ies = rcu_dereference(cbss->ies); 4731 parse_params.start = ies->data; 4732 parse_params.len = ies->len; 4733 elems = ieee802_11_parse_elems_full(&parse_params); 4734 if (!elems) { 4735 rcu_read_unlock(); 4736 return -ENOMEM; 4737 } 4738 4739 sband = local->hw.wiphy->bands[cbss->channel->band]; 4740 4741 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4742 IEEE80211_CONN_DISABLE_80P80MHZ | 4743 IEEE80211_CONN_DISABLE_160MHZ); 4744 4745 /* disable HT/VHT/HE if we don't support them */ 4746 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4747 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4748 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4749 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4750 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4751 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4752 } 4753 4754 if (!sband->vht_cap.vht_supported && is_5ghz) { 4755 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4756 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4757 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4758 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4759 } 4760 4761 if (!ieee80211_get_he_iftype_cap(sband, 4762 ieee80211_vif_type_p2p(&sdata->vif))) { 4763 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4764 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4765 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4766 } 4767 4768 if (!ieee80211_get_eht_iftype_cap(sband, 4769 ieee80211_vif_type_p2p(&sdata->vif))) { 4770 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4771 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4772 } 4773 4774 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4775 ht_oper = elems->ht_operation; 4776 ht_cap = elems->ht_cap_elem; 4777 4778 if (!ht_cap) { 4779 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4780 ht_oper = NULL; 4781 } 4782 } 4783 4784 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4785 vht_oper = elems->vht_operation; 4786 if (vht_oper && !ht_oper) { 4787 vht_oper = NULL; 4788 sdata_info(sdata, 4789 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4790 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4791 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4792 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4793 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4794 } 4795 4796 if (!elems->vht_cap_elem) { 4797 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4798 vht_oper = NULL; 4799 } 4800 } 4801 4802 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4803 he_oper = elems->he_operation; 4804 4805 if (link && is_6ghz) { 4806 struct ieee80211_bss_conf *bss_conf; 4807 u8 j = 0; 4808 4809 bss_conf = link->conf; 4810 4811 if (elems->pwr_constr_elem) 4812 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4813 4814 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4815 ARRAY_SIZE(elems->tx_pwr_env)); 4816 4817 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4818 if (elems->tx_pwr_env_len[i] > 4819 sizeof(bss_conf->tx_pwr_env[j])) 4820 continue; 4821 4822 bss_conf->tx_pwr_env_num++; 4823 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4824 elems->tx_pwr_env_len[i]); 4825 j++; 4826 } 4827 } 4828 4829 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4830 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4831 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4832 IEEE80211_CONN_DISABLE_EHT; 4833 } 4834 4835 /* 4836 * EHT requires HE to be supported as well. Specifically for 6 GHz 4837 * channels, the operation channel information can only be deduced from 4838 * both the 6 GHz operation information (from the HE operation IE) and 4839 * EHT operation. 4840 */ 4841 if (!(*conn_flags & 4842 (IEEE80211_CONN_DISABLE_HE | 4843 IEEE80211_CONN_DISABLE_EHT)) && 4844 he_oper) { 4845 const struct cfg80211_bss_ies *cbss_ies; 4846 const u8 *eht_oper_ie; 4847 4848 cbss_ies = rcu_dereference(cbss->ies); 4849 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4850 cbss_ies->data, cbss_ies->len); 4851 if (eht_oper_ie && eht_oper_ie[1] >= 4852 1 + sizeof(struct ieee80211_eht_operation)) 4853 eht_oper = (void *)(eht_oper_ie + 3); 4854 else 4855 eht_oper = NULL; 4856 } 4857 4858 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4859 have_80mhz = false; 4860 for (i = 0; i < sband->n_channels; i++) { 4861 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4862 IEEE80211_CHAN_NO_80MHZ)) 4863 continue; 4864 4865 have_80mhz = true; 4866 break; 4867 } 4868 4869 if (!have_80mhz) { 4870 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4871 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4872 } 4873 4874 if (sband->band == NL80211_BAND_S1GHZ) { 4875 s1g_oper = elems->s1g_oper; 4876 if (!s1g_oper) 4877 sdata_info(sdata, 4878 "AP missing S1G operation element?\n"); 4879 } 4880 4881 *conn_flags |= 4882 ieee80211_determine_chantype(sdata, link, *conn_flags, 4883 sband, 4884 cbss->channel, 4885 bss->vht_cap_info, 4886 ht_oper, vht_oper, 4887 he_oper, eht_oper, 4888 s1g_oper, 4889 &chandef, false); 4890 4891 if (link) 4892 link->needed_rx_chains = 4893 min(ieee80211_max_rx_chains(link, cbss), 4894 local->rx_chains); 4895 4896 rcu_read_unlock(); 4897 /* the element data was RCU protected so no longer valid anyway */ 4898 kfree(elems); 4899 elems = NULL; 4900 4901 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4902 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4903 return -EINVAL; 4904 } 4905 4906 if (!link) 4907 return 0; 4908 4909 /* will change later if needed */ 4910 link->smps_mode = IEEE80211_SMPS_OFF; 4911 4912 mutex_lock(&local->mtx); 4913 /* 4914 * If this fails (possibly due to channel context sharing 4915 * on incompatible channels, e.g. 80+80 and 160 sharing the 4916 * same control channel) try to use a smaller bandwidth. 4917 */ 4918 ret = ieee80211_link_use_channel(link, &chandef, 4919 IEEE80211_CHANCTX_SHARED); 4920 4921 /* don't downgrade for 5 and 10 MHz channels, though. */ 4922 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4923 chandef.width == NL80211_CHAN_WIDTH_10) 4924 goto out; 4925 4926 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4927 *conn_flags |= 4928 ieee80211_chandef_downgrade(&chandef); 4929 ret = ieee80211_link_use_channel(link, &chandef, 4930 IEEE80211_CHANCTX_SHARED); 4931 } 4932 out: 4933 mutex_unlock(&local->mtx); 4934 return ret; 4935 } 4936 4937 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4938 u8 *dtim_count, u8 *dtim_period) 4939 { 4940 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4941 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4942 ies->len); 4943 const struct ieee80211_tim_ie *tim = NULL; 4944 const struct ieee80211_bssid_index *idx; 4945 bool valid = tim_ie && tim_ie[1] >= 2; 4946 4947 if (valid) 4948 tim = (void *)(tim_ie + 2); 4949 4950 if (dtim_count) 4951 *dtim_count = valid ? tim->dtim_count : 0; 4952 4953 if (dtim_period) 4954 *dtim_period = valid ? tim->dtim_period : 0; 4955 4956 /* Check if value is overridden by non-transmitted profile */ 4957 if (!idx_ie || idx_ie[1] < 3) 4958 return valid; 4959 4960 idx = (void *)(idx_ie + 2); 4961 4962 if (dtim_count) 4963 *dtim_count = idx->dtim_count; 4964 4965 if (dtim_period) 4966 *dtim_period = idx->dtim_period; 4967 4968 return true; 4969 } 4970 4971 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4972 struct ieee80211_mgmt *mgmt, 4973 struct ieee802_11_elems *elems, 4974 const u8 *elem_start, unsigned int elem_len) 4975 { 4976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4977 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4978 struct ieee80211_local *local = sdata->local; 4979 unsigned int link_id; 4980 struct sta_info *sta; 4981 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4982 u16 valid_links = 0; 4983 int err; 4984 4985 mutex_lock(&sdata->local->sta_mtx); 4986 /* 4987 * station info was already allocated and inserted before 4988 * the association and should be available to us 4989 */ 4990 sta = sta_info_get(sdata, assoc_data->ap_addr); 4991 if (WARN_ON(!sta)) 4992 goto out_err; 4993 4994 if (sdata->vif.valid_links) { 4995 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4996 if (!assoc_data->link[link_id].bss) 4997 continue; 4998 valid_links |= BIT(link_id); 4999 5000 if (link_id != assoc_data->assoc_link_id) { 5001 err = ieee80211_sta_allocate_link(sta, link_id); 5002 if (err) 5003 goto out_err; 5004 } 5005 } 5006 5007 ieee80211_vif_set_links(sdata, valid_links); 5008 } 5009 5010 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5011 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5012 struct ieee80211_link_data *link; 5013 struct link_sta_info *link_sta; 5014 5015 if (!cbss) 5016 continue; 5017 5018 link = sdata_dereference(sdata->link[link_id], sdata); 5019 if (WARN_ON(!link)) 5020 goto out_err; 5021 5022 if (sdata->vif.valid_links) 5023 link_info(link, 5024 "local address %pM, AP link address %pM%s\n", 5025 link->conf->addr, 5026 assoc_data->link[link_id].bss->bssid, 5027 link_id == assoc_data->assoc_link_id ? 5028 " (assoc)" : ""); 5029 5030 link_sta = rcu_dereference_protected(sta->link[link_id], 5031 lockdep_is_held(&local->sta_mtx)); 5032 if (WARN_ON(!link_sta)) 5033 goto out_err; 5034 5035 if (!link->u.mgd.have_beacon) { 5036 const struct cfg80211_bss_ies *ies; 5037 5038 rcu_read_lock(); 5039 ies = rcu_dereference(cbss->beacon_ies); 5040 if (ies) 5041 link->u.mgd.have_beacon = true; 5042 else 5043 ies = rcu_dereference(cbss->ies); 5044 ieee80211_get_dtim(ies, 5045 &link->conf->sync_dtim_count, 5046 &link->u.mgd.dtim_period); 5047 link->conf->beacon_int = cbss->beacon_interval; 5048 rcu_read_unlock(); 5049 } 5050 5051 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5052 5053 if (link_id != assoc_data->assoc_link_id) { 5054 err = ieee80211_prep_channel(sdata, link, cbss, 5055 &link->u.mgd.conn_flags); 5056 if (err) { 5057 link_info(link, "prep_channel failed\n"); 5058 goto out_err; 5059 } 5060 } 5061 5062 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5063 assoc_data->link[link_id].bss); 5064 if (err) 5065 goto out_err; 5066 5067 if (!ieee80211_assoc_config_link(link, link_sta, 5068 assoc_data->link[link_id].bss, 5069 mgmt, elem_start, elem_len, 5070 &changed[link_id])) 5071 goto out_err; 5072 5073 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5074 valid_links &= ~BIT(link_id); 5075 ieee80211_sta_remove_link(sta, link_id); 5076 continue; 5077 } 5078 5079 if (link_id != assoc_data->assoc_link_id) { 5080 err = ieee80211_sta_activate_link(sta, link_id); 5081 if (err) 5082 goto out_err; 5083 } 5084 } 5085 5086 /* links might have changed due to rejected ones, set them again */ 5087 ieee80211_vif_set_links(sdata, valid_links); 5088 5089 rate_control_rate_init(sta); 5090 5091 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5092 set_sta_flag(sta, WLAN_STA_MFP); 5093 sta->sta.mfp = true; 5094 } else { 5095 sta->sta.mfp = false; 5096 } 5097 5098 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5099 elems->ext_capab_len); 5100 5101 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5102 local->hw.queues >= IEEE80211_NUM_ACS; 5103 5104 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5105 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5106 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5107 if (err) { 5108 sdata_info(sdata, 5109 "failed to move station %pM to desired state\n", 5110 sta->sta.addr); 5111 WARN_ON(__sta_info_destroy(sta)); 5112 goto out_err; 5113 } 5114 5115 if (sdata->wdev.use_4addr) 5116 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5117 5118 mutex_unlock(&sdata->local->sta_mtx); 5119 5120 ieee80211_set_associated(sdata, assoc_data, changed); 5121 5122 /* 5123 * If we're using 4-addr mode, let the AP know that we're 5124 * doing so, so that it can create the STA VLAN on its side 5125 */ 5126 if (ifmgd->use_4addr) 5127 ieee80211_send_4addr_nullfunc(local, sdata); 5128 5129 /* 5130 * Start timer to probe the connection to the AP now. 5131 * Also start the timer that will detect beacon loss. 5132 */ 5133 ieee80211_sta_reset_beacon_monitor(sdata); 5134 ieee80211_sta_reset_conn_monitor(sdata); 5135 5136 return true; 5137 out_err: 5138 eth_zero_addr(sdata->vif.cfg.ap_addr); 5139 mutex_unlock(&sdata->local->sta_mtx); 5140 return false; 5141 } 5142 5143 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5144 struct ieee80211_mgmt *mgmt, 5145 size_t len) 5146 { 5147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5148 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5149 u16 capab_info, status_code, aid; 5150 struct ieee80211_elems_parse_params parse_params = { 5151 .bss = NULL, 5152 .link_id = -1, 5153 .from_ap = true, 5154 }; 5155 struct ieee802_11_elems *elems; 5156 int ac; 5157 const u8 *elem_start; 5158 unsigned int elem_len; 5159 bool reassoc; 5160 struct ieee80211_event event = { 5161 .type = MLME_EVENT, 5162 .u.mlme.data = ASSOC_EVENT, 5163 }; 5164 struct ieee80211_prep_tx_info info = {}; 5165 struct cfg80211_rx_assoc_resp resp = { 5166 .uapsd_queues = -1, 5167 }; 5168 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5169 unsigned int link_id; 5170 5171 sdata_assert_lock(sdata); 5172 5173 if (!assoc_data) 5174 return; 5175 5176 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5177 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5178 return; 5179 5180 /* 5181 * AssocResp and ReassocResp have identical structure, so process both 5182 * of them in this function. 5183 */ 5184 5185 if (len < 24 + 6) 5186 return; 5187 5188 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5189 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5190 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5191 if (assoc_data->s1g) 5192 elem_start = mgmt->u.s1g_assoc_resp.variable; 5193 else 5194 elem_start = mgmt->u.assoc_resp.variable; 5195 5196 /* 5197 * Note: this may not be perfect, AP might misbehave - if 5198 * anyone needs to rely on perfect complete notification 5199 * with the exact right subtype, then we need to track what 5200 * we actually transmitted. 5201 */ 5202 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5203 IEEE80211_STYPE_ASSOC_REQ; 5204 5205 if (assoc_data->fils_kek_len && 5206 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5207 return; 5208 5209 elem_len = len - (elem_start - (u8 *)mgmt); 5210 parse_params.start = elem_start; 5211 parse_params.len = elem_len; 5212 elems = ieee802_11_parse_elems_full(&parse_params); 5213 if (!elems) 5214 goto notify_driver; 5215 5216 if (elems->aid_resp) 5217 aid = le16_to_cpu(elems->aid_resp->aid); 5218 else if (assoc_data->s1g) 5219 aid = 0; /* TODO */ 5220 else 5221 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5222 5223 /* 5224 * The 5 MSB of the AID field are reserved 5225 * (802.11-2016 9.4.1.8 AID field) 5226 */ 5227 aid &= 0x7ff; 5228 5229 sdata_info(sdata, 5230 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5231 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5232 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5233 5234 ifmgd->broken_ap = false; 5235 5236 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5237 elems->timeout_int && 5238 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5239 u32 tu, ms; 5240 5241 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5242 le32_to_cpu(elems->timeout_int->value)); 5243 5244 tu = le32_to_cpu(elems->timeout_int->value); 5245 ms = tu * 1024 / 1000; 5246 sdata_info(sdata, 5247 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5248 assoc_data->ap_addr, tu, ms); 5249 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5250 assoc_data->timeout_started = true; 5251 if (ms > IEEE80211_ASSOC_TIMEOUT) 5252 run_again(sdata, assoc_data->timeout); 5253 goto notify_driver; 5254 } 5255 5256 if (status_code != WLAN_STATUS_SUCCESS) { 5257 sdata_info(sdata, "%pM denied association (code=%d)\n", 5258 assoc_data->ap_addr, status_code); 5259 event.u.mlme.status = MLME_DENIED; 5260 event.u.mlme.reason = status_code; 5261 drv_event_callback(sdata->local, sdata, &event); 5262 } else { 5263 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5264 sdata_info(sdata, 5265 "invalid AID value %d (out of range), turn off PS\n", 5266 aid); 5267 aid = 0; 5268 ifmgd->broken_ap = true; 5269 } 5270 5271 if (sdata->vif.valid_links) { 5272 if (!elems->multi_link) { 5273 sdata_info(sdata, 5274 "MLO association with %pM but no multi-link element in response!\n", 5275 assoc_data->ap_addr); 5276 goto abandon_assoc; 5277 } 5278 5279 if (le16_get_bits(elems->multi_link->control, 5280 IEEE80211_ML_CONTROL_TYPE) != 5281 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5282 sdata_info(sdata, 5283 "bad multi-link element (control=0x%x)\n", 5284 le16_to_cpu(elems->multi_link->control)); 5285 goto abandon_assoc; 5286 } else { 5287 struct ieee80211_mle_basic_common_info *common; 5288 5289 common = (void *)elems->multi_link->variable; 5290 5291 if (memcmp(assoc_data->ap_addr, 5292 common->mld_mac_addr, ETH_ALEN)) { 5293 sdata_info(sdata, 5294 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5295 common->mld_mac_addr, 5296 assoc_data->ap_addr); 5297 goto abandon_assoc; 5298 } 5299 } 5300 } 5301 5302 sdata->vif.cfg.aid = aid; 5303 5304 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5305 elem_start, elem_len)) { 5306 /* oops -- internal error -- send timeout for now */ 5307 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5308 goto notify_driver; 5309 } 5310 event.u.mlme.status = MLME_SUCCESS; 5311 drv_event_callback(sdata->local, sdata, &event); 5312 sdata_info(sdata, "associated\n"); 5313 5314 info.success = 1; 5315 } 5316 5317 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5318 struct ieee80211_link_data *link; 5319 5320 link = sdata_dereference(sdata->link[link_id], sdata); 5321 if (!link) 5322 continue; 5323 5324 if (!assoc_data->link[link_id].bss) 5325 continue; 5326 5327 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5328 resp.links[link_id].addr = link->conf->addr; 5329 resp.links[link_id].status = assoc_data->link[link_id].status; 5330 5331 /* get uapsd queues configuration - same for all links */ 5332 resp.uapsd_queues = 0; 5333 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5334 if (link->tx_conf[ac].uapsd) 5335 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5336 } 5337 5338 if (sdata->vif.valid_links) { 5339 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5340 resp.ap_mld_addr = ap_mld_addr; 5341 } 5342 5343 ieee80211_destroy_assoc_data(sdata, 5344 status_code == WLAN_STATUS_SUCCESS ? 5345 ASSOC_SUCCESS : 5346 ASSOC_REJECTED); 5347 5348 resp.buf = (u8 *)mgmt; 5349 resp.len = len; 5350 resp.req_ies = ifmgd->assoc_req_ies; 5351 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5352 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5353 notify_driver: 5354 drv_mgd_complete_tx(sdata->local, sdata, &info); 5355 kfree(elems); 5356 return; 5357 abandon_assoc: 5358 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5359 goto notify_driver; 5360 } 5361 5362 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5363 struct ieee80211_mgmt *mgmt, size_t len, 5364 struct ieee80211_rx_status *rx_status) 5365 { 5366 struct ieee80211_sub_if_data *sdata = link->sdata; 5367 struct ieee80211_local *local = sdata->local; 5368 struct ieee80211_bss *bss; 5369 struct ieee80211_channel *channel; 5370 5371 sdata_assert_lock(sdata); 5372 5373 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5374 ieee80211_rx_status_to_khz(rx_status)); 5375 if (!channel) 5376 return; 5377 5378 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5379 if (bss) { 5380 link->conf->beacon_rate = bss->beacon_rate; 5381 ieee80211_rx_bss_put(local, bss); 5382 } 5383 } 5384 5385 5386 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5387 struct sk_buff *skb) 5388 { 5389 struct ieee80211_sub_if_data *sdata = link->sdata; 5390 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5391 struct ieee80211_if_managed *ifmgd; 5392 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5393 struct ieee80211_channel *channel; 5394 size_t baselen, len = skb->len; 5395 5396 ifmgd = &sdata->u.mgd; 5397 5398 sdata_assert_lock(sdata); 5399 5400 /* 5401 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5402 * "If a 6 GHz AP receives a Probe Request frame and responds with 5403 * a Probe Response frame [..], the Address 1 field of the Probe 5404 * Response frame shall be set to the broadcast address [..]" 5405 * So, on 6GHz band we should also accept broadcast responses. 5406 */ 5407 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5408 rx_status->freq); 5409 if (!channel) 5410 return; 5411 5412 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5413 (channel->band != NL80211_BAND_6GHZ || 5414 !is_broadcast_ether_addr(mgmt->da))) 5415 return; /* ignore ProbeResp to foreign address */ 5416 5417 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5418 if (baselen > len) 5419 return; 5420 5421 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5422 5423 if (ifmgd->associated && 5424 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5425 ieee80211_reset_ap_probe(sdata); 5426 } 5427 5428 /* 5429 * This is the canonical list of information elements we care about, 5430 * the filter code also gives us all changes to the Microsoft OUI 5431 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5432 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5433 * changes to requested client power. 5434 * 5435 * We implement beacon filtering in software since that means we can 5436 * avoid processing the frame here and in cfg80211, and userspace 5437 * will not be able to tell whether the hardware supports it or not. 5438 * 5439 * XXX: This list needs to be dynamic -- userspace needs to be able to 5440 * add items it requires. It also needs to be able to tell us to 5441 * look out for other vendor IEs. 5442 */ 5443 static const u64 care_about_ies = 5444 (1ULL << WLAN_EID_COUNTRY) | 5445 (1ULL << WLAN_EID_ERP_INFO) | 5446 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5447 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5448 (1ULL << WLAN_EID_HT_CAPABILITY) | 5449 (1ULL << WLAN_EID_HT_OPERATION) | 5450 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5451 5452 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5453 struct ieee80211_if_managed *ifmgd, 5454 struct ieee80211_bss_conf *bss_conf, 5455 struct ieee80211_local *local, 5456 struct ieee80211_rx_status *rx_status) 5457 { 5458 struct ieee80211_sub_if_data *sdata = link->sdata; 5459 5460 /* Track average RSSI from the Beacon frames of the current AP */ 5461 5462 if (!link->u.mgd.tracking_signal_avg) { 5463 link->u.mgd.tracking_signal_avg = true; 5464 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5465 link->u.mgd.last_cqm_event_signal = 0; 5466 link->u.mgd.count_beacon_signal = 1; 5467 link->u.mgd.last_ave_beacon_signal = 0; 5468 } else { 5469 link->u.mgd.count_beacon_signal++; 5470 } 5471 5472 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5473 -rx_status->signal); 5474 5475 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5476 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5477 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5478 int last_sig = link->u.mgd.last_ave_beacon_signal; 5479 struct ieee80211_event event = { 5480 .type = RSSI_EVENT, 5481 }; 5482 5483 /* 5484 * if signal crosses either of the boundaries, invoke callback 5485 * with appropriate parameters 5486 */ 5487 if (sig > ifmgd->rssi_max_thold && 5488 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5489 link->u.mgd.last_ave_beacon_signal = sig; 5490 event.u.rssi.data = RSSI_EVENT_HIGH; 5491 drv_event_callback(local, sdata, &event); 5492 } else if (sig < ifmgd->rssi_min_thold && 5493 (last_sig >= ifmgd->rssi_max_thold || 5494 last_sig == 0)) { 5495 link->u.mgd.last_ave_beacon_signal = sig; 5496 event.u.rssi.data = RSSI_EVENT_LOW; 5497 drv_event_callback(local, sdata, &event); 5498 } 5499 } 5500 5501 if (bss_conf->cqm_rssi_thold && 5502 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5503 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5504 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5505 int last_event = link->u.mgd.last_cqm_event_signal; 5506 int thold = bss_conf->cqm_rssi_thold; 5507 int hyst = bss_conf->cqm_rssi_hyst; 5508 5509 if (sig < thold && 5510 (last_event == 0 || sig < last_event - hyst)) { 5511 link->u.mgd.last_cqm_event_signal = sig; 5512 ieee80211_cqm_rssi_notify( 5513 &sdata->vif, 5514 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5515 sig, GFP_KERNEL); 5516 } else if (sig > thold && 5517 (last_event == 0 || sig > last_event + hyst)) { 5518 link->u.mgd.last_cqm_event_signal = sig; 5519 ieee80211_cqm_rssi_notify( 5520 &sdata->vif, 5521 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5522 sig, GFP_KERNEL); 5523 } 5524 } 5525 5526 if (bss_conf->cqm_rssi_low && 5527 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5528 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5529 int last_event = link->u.mgd.last_cqm_event_signal; 5530 int low = bss_conf->cqm_rssi_low; 5531 int high = bss_conf->cqm_rssi_high; 5532 5533 if (sig < low && 5534 (last_event == 0 || last_event >= low)) { 5535 link->u.mgd.last_cqm_event_signal = sig; 5536 ieee80211_cqm_rssi_notify( 5537 &sdata->vif, 5538 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5539 sig, GFP_KERNEL); 5540 } else if (sig > high && 5541 (last_event == 0 || last_event <= high)) { 5542 link->u.mgd.last_cqm_event_signal = sig; 5543 ieee80211_cqm_rssi_notify( 5544 &sdata->vif, 5545 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5546 sig, GFP_KERNEL); 5547 } 5548 } 5549 } 5550 5551 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5552 struct cfg80211_bss *bss) 5553 { 5554 if (ether_addr_equal(tx_bssid, bss->bssid)) 5555 return true; 5556 if (!bss->transmitted_bss) 5557 return false; 5558 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5559 } 5560 5561 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5562 const struct ieee80211_eht_operation *eht_oper, 5563 u64 *changed) 5564 { 5565 u16 bitmap = 0, extracted; 5566 5567 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5568 (eht_oper->params & 5569 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5570 const struct ieee80211_eht_operation_info *info = 5571 (void *)eht_oper->optional; 5572 const u8 *disable_subchannel_bitmap = info->optional; 5573 5574 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5575 } 5576 5577 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5578 &link->conf->chandef, 5579 bitmap); 5580 5581 /* accept if there are no changes */ 5582 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5583 extracted == link->conf->eht_puncturing) 5584 return true; 5585 5586 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5587 &link->conf->chandef)) { 5588 link_info(link, 5589 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5590 link->u.mgd.bssid, 5591 bitmap, 5592 link->conf->chandef.width); 5593 return false; 5594 } 5595 5596 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5597 return true; 5598 } 5599 5600 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5601 struct ieee80211_hdr *hdr, size_t len, 5602 struct ieee80211_rx_status *rx_status) 5603 { 5604 struct ieee80211_sub_if_data *sdata = link->sdata; 5605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5606 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5607 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5608 struct ieee80211_mgmt *mgmt = (void *) hdr; 5609 size_t baselen; 5610 struct ieee802_11_elems *elems; 5611 struct ieee80211_local *local = sdata->local; 5612 struct ieee80211_chanctx_conf *chanctx_conf; 5613 struct ieee80211_supported_band *sband; 5614 struct ieee80211_channel *chan; 5615 struct link_sta_info *link_sta; 5616 struct sta_info *sta; 5617 u64 changed = 0; 5618 bool erp_valid; 5619 u8 erp_value = 0; 5620 u32 ncrc = 0; 5621 u8 *bssid, *variable = mgmt->u.beacon.variable; 5622 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5623 struct ieee80211_elems_parse_params parse_params = { 5624 .link_id = -1, 5625 .from_ap = true, 5626 }; 5627 5628 sdata_assert_lock(sdata); 5629 5630 /* Process beacon from the current BSS */ 5631 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5632 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5633 struct ieee80211_ext *ext = (void *) mgmt; 5634 5635 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5636 variable = ext->u.s1g_short_beacon.variable; 5637 else 5638 variable = ext->u.s1g_beacon.variable; 5639 } 5640 5641 baselen = (u8 *) variable - (u8 *) mgmt; 5642 if (baselen > len) 5643 return; 5644 5645 parse_params.start = variable; 5646 parse_params.len = len - baselen; 5647 5648 rcu_read_lock(); 5649 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5650 if (!chanctx_conf) { 5651 rcu_read_unlock(); 5652 return; 5653 } 5654 5655 if (ieee80211_rx_status_to_khz(rx_status) != 5656 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5657 rcu_read_unlock(); 5658 return; 5659 } 5660 chan = chanctx_conf->def.chan; 5661 rcu_read_unlock(); 5662 5663 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5664 !WARN_ON(sdata->vif.valid_links) && 5665 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5666 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5667 elems = ieee802_11_parse_elems_full(&parse_params); 5668 if (!elems) 5669 return; 5670 5671 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5672 5673 if (elems->dtim_period) 5674 link->u.mgd.dtim_period = elems->dtim_period; 5675 link->u.mgd.have_beacon = true; 5676 ifmgd->assoc_data->need_beacon = false; 5677 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5678 link->conf->sync_tsf = 5679 le64_to_cpu(mgmt->u.beacon.timestamp); 5680 link->conf->sync_device_ts = 5681 rx_status->device_timestamp; 5682 link->conf->sync_dtim_count = elems->dtim_count; 5683 } 5684 5685 if (elems->mbssid_config_ie) 5686 bss_conf->profile_periodicity = 5687 elems->mbssid_config_ie->profile_periodicity; 5688 else 5689 bss_conf->profile_periodicity = 0; 5690 5691 if (elems->ext_capab_len >= 11 && 5692 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5693 bss_conf->ema_ap = true; 5694 else 5695 bss_conf->ema_ap = false; 5696 5697 /* continue assoc process */ 5698 ifmgd->assoc_data->timeout = jiffies; 5699 ifmgd->assoc_data->timeout_started = true; 5700 run_again(sdata, ifmgd->assoc_data->timeout); 5701 kfree(elems); 5702 return; 5703 } 5704 5705 if (!ifmgd->associated || 5706 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5707 return; 5708 bssid = link->u.mgd.bssid; 5709 5710 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5711 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5712 local, rx_status); 5713 5714 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5715 mlme_dbg_ratelimited(sdata, 5716 "cancelling AP probe due to a received beacon\n"); 5717 ieee80211_reset_ap_probe(sdata); 5718 } 5719 5720 /* 5721 * Push the beacon loss detection into the future since 5722 * we are processing a beacon from the AP just now. 5723 */ 5724 ieee80211_sta_reset_beacon_monitor(sdata); 5725 5726 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5727 * element (which carries the beacon interval). Don't forget to add a 5728 * bit to care_about_ies[] above if mac80211 is interested in a 5729 * changing S1G element. 5730 */ 5731 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5732 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5733 parse_params.bss = link->u.mgd.bss; 5734 parse_params.filter = care_about_ies; 5735 parse_params.crc = ncrc; 5736 elems = ieee802_11_parse_elems_full(&parse_params); 5737 if (!elems) 5738 return; 5739 ncrc = elems->crc; 5740 5741 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5742 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5743 if (local->hw.conf.dynamic_ps_timeout > 0) { 5744 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5745 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5746 ieee80211_hw_config(local, 5747 IEEE80211_CONF_CHANGE_PS); 5748 } 5749 ieee80211_send_nullfunc(local, sdata, false); 5750 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5751 local->pspolling = true; 5752 5753 /* 5754 * Here is assumed that the driver will be 5755 * able to send ps-poll frame and receive a 5756 * response even though power save mode is 5757 * enabled, but some drivers might require 5758 * to disable power save here. This needs 5759 * to be investigated. 5760 */ 5761 ieee80211_send_pspoll(local, sdata); 5762 } 5763 } 5764 5765 if (sdata->vif.p2p || 5766 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5767 struct ieee80211_p2p_noa_attr noa = {}; 5768 int ret; 5769 5770 ret = cfg80211_get_p2p_attr(variable, 5771 len - baselen, 5772 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5773 (u8 *) &noa, sizeof(noa)); 5774 if (ret >= 2) { 5775 if (link->u.mgd.p2p_noa_index != noa.index) { 5776 /* valid noa_attr and index changed */ 5777 link->u.mgd.p2p_noa_index = noa.index; 5778 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5779 changed |= BSS_CHANGED_P2P_PS; 5780 /* 5781 * make sure we update all information, the CRC 5782 * mechanism doesn't look at P2P attributes. 5783 */ 5784 link->u.mgd.beacon_crc_valid = false; 5785 } 5786 } else if (link->u.mgd.p2p_noa_index != -1) { 5787 /* noa_attr not found and we had valid noa_attr before */ 5788 link->u.mgd.p2p_noa_index = -1; 5789 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5790 changed |= BSS_CHANGED_P2P_PS; 5791 link->u.mgd.beacon_crc_valid = false; 5792 } 5793 } 5794 5795 if (link->u.mgd.csa_waiting_bcn) 5796 ieee80211_chswitch_post_beacon(link); 5797 5798 /* 5799 * Update beacon timing and dtim count on every beacon appearance. This 5800 * will allow the driver to use the most updated values. Do it before 5801 * comparing this one with last received beacon. 5802 * IMPORTANT: These parameters would possibly be out of sync by the time 5803 * the driver will use them. The synchronized view is currently 5804 * guaranteed only in certain callbacks. 5805 */ 5806 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5807 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5808 link->conf->sync_tsf = 5809 le64_to_cpu(mgmt->u.beacon.timestamp); 5810 link->conf->sync_device_ts = 5811 rx_status->device_timestamp; 5812 link->conf->sync_dtim_count = elems->dtim_count; 5813 } 5814 5815 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5816 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5817 goto free; 5818 link->u.mgd.beacon_crc = ncrc; 5819 link->u.mgd.beacon_crc_valid = true; 5820 5821 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5822 5823 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5824 rx_status->device_timestamp, 5825 elems, true); 5826 5827 if (!link->u.mgd.disable_wmm_tracking && 5828 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5829 elems->wmm_param_len, 5830 elems->mu_edca_param_set)) 5831 changed |= BSS_CHANGED_QOS; 5832 5833 /* 5834 * If we haven't had a beacon before, tell the driver about the 5835 * DTIM period (and beacon timing if desired) now. 5836 */ 5837 if (!link->u.mgd.have_beacon) { 5838 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5839 bss_conf->dtim_period = elems->dtim_period ?: 1; 5840 5841 changed |= BSS_CHANGED_BEACON_INFO; 5842 link->u.mgd.have_beacon = true; 5843 5844 mutex_lock(&local->iflist_mtx); 5845 ieee80211_recalc_ps(local); 5846 mutex_unlock(&local->iflist_mtx); 5847 5848 ieee80211_recalc_ps_vif(sdata); 5849 } 5850 5851 if (elems->erp_info) { 5852 erp_valid = true; 5853 erp_value = elems->erp_info[0]; 5854 } else { 5855 erp_valid = false; 5856 } 5857 5858 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5859 changed |= ieee80211_handle_bss_capability(link, 5860 le16_to_cpu(mgmt->u.beacon.capab_info), 5861 erp_valid, erp_value); 5862 5863 mutex_lock(&local->sta_mtx); 5864 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5865 if (WARN_ON(!sta)) { 5866 mutex_unlock(&local->sta_mtx); 5867 goto free; 5868 } 5869 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5870 lockdep_is_held(&local->sta_mtx)); 5871 if (WARN_ON(!link_sta)) { 5872 mutex_unlock(&local->sta_mtx); 5873 goto free; 5874 } 5875 5876 if (WARN_ON(!link->conf->chandef.chan)) 5877 goto free; 5878 5879 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5880 5881 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5882 5883 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5884 elems->vht_cap_elem, elems->ht_operation, 5885 elems->vht_operation, elems->he_operation, 5886 elems->eht_operation, 5887 elems->s1g_oper, bssid, &changed)) { 5888 mutex_unlock(&local->sta_mtx); 5889 sdata_info(sdata, 5890 "failed to follow AP %pM bandwidth change, disconnect\n", 5891 bssid); 5892 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5893 WLAN_REASON_DEAUTH_LEAVING, 5894 true, deauth_buf); 5895 ieee80211_report_disconnect(sdata, deauth_buf, 5896 sizeof(deauth_buf), true, 5897 WLAN_REASON_DEAUTH_LEAVING, 5898 false); 5899 goto free; 5900 } 5901 5902 if (elems->opmode_notif) 5903 ieee80211_vht_handle_opmode(sdata, link_sta, 5904 *elems->opmode_notif, 5905 rx_status->band); 5906 mutex_unlock(&local->sta_mtx); 5907 5908 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5909 elems->country_elem, 5910 elems->country_elem_len, 5911 elems->pwr_constr_elem, 5912 elems->cisco_dtpc_elem); 5913 5914 if (elems->eht_operation && 5915 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 5916 if (!ieee80211_config_puncturing(link, elems->eht_operation, 5917 &changed)) { 5918 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5919 WLAN_REASON_DEAUTH_LEAVING, 5920 true, deauth_buf); 5921 ieee80211_report_disconnect(sdata, deauth_buf, 5922 sizeof(deauth_buf), true, 5923 WLAN_REASON_DEAUTH_LEAVING, 5924 false); 5925 goto free; 5926 } 5927 } 5928 5929 ieee80211_link_info_change_notify(sdata, link, changed); 5930 free: 5931 kfree(elems); 5932 } 5933 5934 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5935 struct sk_buff *skb) 5936 { 5937 struct ieee80211_link_data *link = &sdata->deflink; 5938 struct ieee80211_rx_status *rx_status; 5939 struct ieee80211_hdr *hdr; 5940 u16 fc; 5941 5942 rx_status = (struct ieee80211_rx_status *) skb->cb; 5943 hdr = (struct ieee80211_hdr *) skb->data; 5944 fc = le16_to_cpu(hdr->frame_control); 5945 5946 sdata_lock(sdata); 5947 switch (fc & IEEE80211_FCTL_STYPE) { 5948 case IEEE80211_STYPE_S1G_BEACON: 5949 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5950 break; 5951 } 5952 sdata_unlock(sdata); 5953 } 5954 5955 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5956 struct sk_buff *skb) 5957 { 5958 struct ieee80211_link_data *link = &sdata->deflink; 5959 struct ieee80211_rx_status *rx_status; 5960 struct ieee80211_mgmt *mgmt; 5961 u16 fc; 5962 int ies_len; 5963 5964 rx_status = (struct ieee80211_rx_status *) skb->cb; 5965 mgmt = (struct ieee80211_mgmt *) skb->data; 5966 fc = le16_to_cpu(mgmt->frame_control); 5967 5968 sdata_lock(sdata); 5969 5970 if (rx_status->link_valid) { 5971 link = sdata_dereference(sdata->link[rx_status->link_id], 5972 sdata); 5973 if (!link) 5974 goto out; 5975 } 5976 5977 switch (fc & IEEE80211_FCTL_STYPE) { 5978 case IEEE80211_STYPE_BEACON: 5979 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5980 skb->len, rx_status); 5981 break; 5982 case IEEE80211_STYPE_PROBE_RESP: 5983 ieee80211_rx_mgmt_probe_resp(link, skb); 5984 break; 5985 case IEEE80211_STYPE_AUTH: 5986 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5987 break; 5988 case IEEE80211_STYPE_DEAUTH: 5989 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5990 break; 5991 case IEEE80211_STYPE_DISASSOC: 5992 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5993 break; 5994 case IEEE80211_STYPE_ASSOC_RESP: 5995 case IEEE80211_STYPE_REASSOC_RESP: 5996 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5997 break; 5998 case IEEE80211_STYPE_ACTION: 5999 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6000 struct ieee802_11_elems *elems; 6001 6002 ies_len = skb->len - 6003 offsetof(struct ieee80211_mgmt, 6004 u.action.u.chan_switch.variable); 6005 6006 if (ies_len < 0) 6007 break; 6008 6009 /* CSA IE cannot be overridden, no need for BSSID */ 6010 elems = ieee802_11_parse_elems( 6011 mgmt->u.action.u.chan_switch.variable, 6012 ies_len, true, NULL); 6013 6014 if (elems && !elems->parse_error) 6015 ieee80211_sta_process_chanswitch(link, 6016 rx_status->mactime, 6017 rx_status->device_timestamp, 6018 elems, false); 6019 kfree(elems); 6020 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6021 struct ieee802_11_elems *elems; 6022 6023 ies_len = skb->len - 6024 offsetof(struct ieee80211_mgmt, 6025 u.action.u.ext_chan_switch.variable); 6026 6027 if (ies_len < 0) 6028 break; 6029 6030 /* 6031 * extended CSA IE can't be overridden, no need for 6032 * BSSID 6033 */ 6034 elems = ieee802_11_parse_elems( 6035 mgmt->u.action.u.ext_chan_switch.variable, 6036 ies_len, true, NULL); 6037 6038 if (elems && !elems->parse_error) { 6039 /* for the handling code pretend it was an IE */ 6040 elems->ext_chansw_ie = 6041 &mgmt->u.action.u.ext_chan_switch.data; 6042 6043 ieee80211_sta_process_chanswitch(link, 6044 rx_status->mactime, 6045 rx_status->device_timestamp, 6046 elems, false); 6047 } 6048 6049 kfree(elems); 6050 } 6051 break; 6052 } 6053 out: 6054 sdata_unlock(sdata); 6055 } 6056 6057 static void ieee80211_sta_timer(struct timer_list *t) 6058 { 6059 struct ieee80211_sub_if_data *sdata = 6060 from_timer(sdata, t, u.mgd.timer); 6061 6062 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 6063 } 6064 6065 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6066 u8 reason, bool tx) 6067 { 6068 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6069 6070 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6071 tx, frame_buf); 6072 6073 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6074 reason, false); 6075 } 6076 6077 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6078 { 6079 struct ieee80211_local *local = sdata->local; 6080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6081 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6082 u32 tx_flags = 0; 6083 u16 trans = 1; 6084 u16 status = 0; 6085 struct ieee80211_prep_tx_info info = { 6086 .subtype = IEEE80211_STYPE_AUTH, 6087 }; 6088 6089 sdata_assert_lock(sdata); 6090 6091 if (WARN_ON_ONCE(!auth_data)) 6092 return -EINVAL; 6093 6094 auth_data->tries++; 6095 6096 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6097 sdata_info(sdata, "authentication with %pM timed out\n", 6098 auth_data->ap_addr); 6099 6100 /* 6101 * Most likely AP is not in the range so remove the 6102 * bss struct for that AP. 6103 */ 6104 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6105 6106 return -ETIMEDOUT; 6107 } 6108 6109 if (auth_data->algorithm == WLAN_AUTH_SAE) 6110 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6111 6112 drv_mgd_prepare_tx(local, sdata, &info); 6113 6114 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6115 auth_data->ap_addr, auth_data->tries, 6116 IEEE80211_AUTH_MAX_TRIES); 6117 6118 auth_data->expected_transaction = 2; 6119 6120 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6121 trans = auth_data->sae_trans; 6122 status = auth_data->sae_status; 6123 auth_data->expected_transaction = trans; 6124 } 6125 6126 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6127 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6128 IEEE80211_TX_INTFL_MLME_CONN_TX; 6129 6130 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6131 auth_data->data, auth_data->data_len, 6132 auth_data->ap_addr, auth_data->ap_addr, 6133 NULL, 0, 0, tx_flags); 6134 6135 if (tx_flags == 0) { 6136 if (auth_data->algorithm == WLAN_AUTH_SAE) 6137 auth_data->timeout = jiffies + 6138 IEEE80211_AUTH_TIMEOUT_SAE; 6139 else 6140 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6141 } else { 6142 auth_data->timeout = 6143 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6144 } 6145 6146 auth_data->timeout_started = true; 6147 run_again(sdata, auth_data->timeout); 6148 6149 return 0; 6150 } 6151 6152 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6153 { 6154 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6155 struct ieee80211_local *local = sdata->local; 6156 int ret; 6157 6158 sdata_assert_lock(sdata); 6159 6160 assoc_data->tries++; 6161 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6162 sdata_info(sdata, "association with %pM timed out\n", 6163 assoc_data->ap_addr); 6164 6165 /* 6166 * Most likely AP is not in the range so remove the 6167 * bss struct for that AP. 6168 */ 6169 cfg80211_unlink_bss(local->hw.wiphy, 6170 assoc_data->link[assoc_data->assoc_link_id].bss); 6171 6172 return -ETIMEDOUT; 6173 } 6174 6175 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6176 assoc_data->ap_addr, assoc_data->tries, 6177 IEEE80211_ASSOC_MAX_TRIES); 6178 ret = ieee80211_send_assoc(sdata); 6179 if (ret) 6180 return ret; 6181 6182 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6183 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6184 assoc_data->timeout_started = true; 6185 run_again(sdata, assoc_data->timeout); 6186 } else { 6187 assoc_data->timeout = 6188 round_jiffies_up(jiffies + 6189 IEEE80211_ASSOC_TIMEOUT_LONG); 6190 assoc_data->timeout_started = true; 6191 run_again(sdata, assoc_data->timeout); 6192 } 6193 6194 return 0; 6195 } 6196 6197 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6198 __le16 fc, bool acked) 6199 { 6200 struct ieee80211_local *local = sdata->local; 6201 6202 sdata->u.mgd.status_fc = fc; 6203 sdata->u.mgd.status_acked = acked; 6204 sdata->u.mgd.status_received = true; 6205 6206 ieee80211_queue_work(&local->hw, &sdata->work); 6207 } 6208 6209 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6210 { 6211 struct ieee80211_local *local = sdata->local; 6212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6213 6214 sdata_lock(sdata); 6215 6216 if (ifmgd->status_received) { 6217 __le16 fc = ifmgd->status_fc; 6218 bool status_acked = ifmgd->status_acked; 6219 6220 ifmgd->status_received = false; 6221 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6222 if (status_acked) { 6223 if (ifmgd->auth_data->algorithm == 6224 WLAN_AUTH_SAE) 6225 ifmgd->auth_data->timeout = 6226 jiffies + 6227 IEEE80211_AUTH_TIMEOUT_SAE; 6228 else 6229 ifmgd->auth_data->timeout = 6230 jiffies + 6231 IEEE80211_AUTH_TIMEOUT_SHORT; 6232 run_again(sdata, ifmgd->auth_data->timeout); 6233 } else { 6234 ifmgd->auth_data->timeout = jiffies - 1; 6235 } 6236 ifmgd->auth_data->timeout_started = true; 6237 } else if (ifmgd->assoc_data && 6238 (ieee80211_is_assoc_req(fc) || 6239 ieee80211_is_reassoc_req(fc))) { 6240 if (status_acked) { 6241 ifmgd->assoc_data->timeout = 6242 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6243 run_again(sdata, ifmgd->assoc_data->timeout); 6244 } else { 6245 ifmgd->assoc_data->timeout = jiffies - 1; 6246 } 6247 ifmgd->assoc_data->timeout_started = true; 6248 } 6249 } 6250 6251 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6252 time_after(jiffies, ifmgd->auth_data->timeout)) { 6253 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6254 /* 6255 * ok ... we waited for assoc or continuation but 6256 * userspace didn't do it, so kill the auth data 6257 */ 6258 ieee80211_destroy_auth_data(sdata, false); 6259 } else if (ieee80211_auth(sdata)) { 6260 u8 ap_addr[ETH_ALEN]; 6261 struct ieee80211_event event = { 6262 .type = MLME_EVENT, 6263 .u.mlme.data = AUTH_EVENT, 6264 .u.mlme.status = MLME_TIMEOUT, 6265 }; 6266 6267 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6268 6269 ieee80211_destroy_auth_data(sdata, false); 6270 6271 cfg80211_auth_timeout(sdata->dev, ap_addr); 6272 drv_event_callback(sdata->local, sdata, &event); 6273 } 6274 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6275 run_again(sdata, ifmgd->auth_data->timeout); 6276 6277 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6278 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6279 if ((ifmgd->assoc_data->need_beacon && 6280 !sdata->deflink.u.mgd.have_beacon) || 6281 ieee80211_do_assoc(sdata)) { 6282 struct ieee80211_event event = { 6283 .type = MLME_EVENT, 6284 .u.mlme.data = ASSOC_EVENT, 6285 .u.mlme.status = MLME_TIMEOUT, 6286 }; 6287 6288 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6289 drv_event_callback(sdata->local, sdata, &event); 6290 } 6291 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6292 run_again(sdata, ifmgd->assoc_data->timeout); 6293 6294 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6295 ifmgd->associated) { 6296 u8 *bssid = sdata->deflink.u.mgd.bssid; 6297 int max_tries; 6298 6299 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6300 max_tries = max_nullfunc_tries; 6301 else 6302 max_tries = max_probe_tries; 6303 6304 /* ACK received for nullfunc probing frame */ 6305 if (!ifmgd->probe_send_count) 6306 ieee80211_reset_ap_probe(sdata); 6307 else if (ifmgd->nullfunc_failed) { 6308 if (ifmgd->probe_send_count < max_tries) { 6309 mlme_dbg(sdata, 6310 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6311 bssid, ifmgd->probe_send_count, 6312 max_tries); 6313 ieee80211_mgd_probe_ap_send(sdata); 6314 } else { 6315 mlme_dbg(sdata, 6316 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6317 bssid); 6318 ieee80211_sta_connection_lost(sdata, 6319 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6320 false); 6321 } 6322 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6323 run_again(sdata, ifmgd->probe_timeout); 6324 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6325 mlme_dbg(sdata, 6326 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6327 bssid, probe_wait_ms); 6328 ieee80211_sta_connection_lost(sdata, 6329 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6330 } else if (ifmgd->probe_send_count < max_tries) { 6331 mlme_dbg(sdata, 6332 "No probe response from AP %pM after %dms, try %d/%i\n", 6333 bssid, probe_wait_ms, 6334 ifmgd->probe_send_count, max_tries); 6335 ieee80211_mgd_probe_ap_send(sdata); 6336 } else { 6337 /* 6338 * We actually lost the connection ... or did we? 6339 * Let's make sure! 6340 */ 6341 mlme_dbg(sdata, 6342 "No probe response from AP %pM after %dms, disconnecting.\n", 6343 bssid, probe_wait_ms); 6344 6345 ieee80211_sta_connection_lost(sdata, 6346 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6347 } 6348 } 6349 6350 sdata_unlock(sdata); 6351 } 6352 6353 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6354 { 6355 struct ieee80211_sub_if_data *sdata = 6356 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6357 6358 if (WARN_ON(sdata->vif.valid_links)) 6359 return; 6360 6361 if (sdata->vif.bss_conf.csa_active && 6362 !sdata->deflink.u.mgd.csa_waiting_bcn) 6363 return; 6364 6365 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6366 return; 6367 6368 sdata->u.mgd.connection_loss = false; 6369 ieee80211_queue_work(&sdata->local->hw, 6370 &sdata->u.mgd.beacon_connection_loss_work); 6371 } 6372 6373 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6374 { 6375 struct ieee80211_sub_if_data *sdata = 6376 from_timer(sdata, t, u.mgd.conn_mon_timer); 6377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6378 struct ieee80211_local *local = sdata->local; 6379 struct sta_info *sta; 6380 unsigned long timeout; 6381 6382 if (WARN_ON(sdata->vif.valid_links)) 6383 return; 6384 6385 if (sdata->vif.bss_conf.csa_active && 6386 !sdata->deflink.u.mgd.csa_waiting_bcn) 6387 return; 6388 6389 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6390 if (!sta) 6391 return; 6392 6393 timeout = sta->deflink.status_stats.last_ack; 6394 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6395 timeout = sta->deflink.rx_stats.last_rx; 6396 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6397 6398 /* If timeout is after now, then update timer to fire at 6399 * the later date, but do not actually probe at this time. 6400 */ 6401 if (time_is_after_jiffies(timeout)) { 6402 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6403 return; 6404 } 6405 6406 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6407 } 6408 6409 static void ieee80211_sta_monitor_work(struct work_struct *work) 6410 { 6411 struct ieee80211_sub_if_data *sdata = 6412 container_of(work, struct ieee80211_sub_if_data, 6413 u.mgd.monitor_work); 6414 6415 ieee80211_mgd_probe_ap(sdata, false); 6416 } 6417 6418 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6419 { 6420 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6421 __ieee80211_stop_poll(sdata); 6422 6423 /* let's probe the connection once */ 6424 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6425 ieee80211_queue_work(&sdata->local->hw, 6426 &sdata->u.mgd.monitor_work); 6427 } 6428 } 6429 6430 #ifdef CONFIG_PM 6431 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6432 { 6433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6434 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6435 6436 sdata_lock(sdata); 6437 6438 if (ifmgd->auth_data || ifmgd->assoc_data) { 6439 const u8 *ap_addr = ifmgd->auth_data ? 6440 ifmgd->auth_data->ap_addr : 6441 ifmgd->assoc_data->ap_addr; 6442 6443 /* 6444 * If we are trying to authenticate / associate while suspending, 6445 * cfg80211 won't know and won't actually abort those attempts, 6446 * thus we need to do that ourselves. 6447 */ 6448 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6449 IEEE80211_STYPE_DEAUTH, 6450 WLAN_REASON_DEAUTH_LEAVING, 6451 false, frame_buf); 6452 if (ifmgd->assoc_data) 6453 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6454 if (ifmgd->auth_data) 6455 ieee80211_destroy_auth_data(sdata, false); 6456 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6457 IEEE80211_DEAUTH_FRAME_LEN, 6458 false); 6459 } 6460 6461 /* This is a bit of a hack - we should find a better and more generic 6462 * solution to this. Normally when suspending, cfg80211 will in fact 6463 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6464 * auth (not so important) or assoc (this is the problem) process. 6465 * 6466 * As a consequence, it can happen that we are in the process of both 6467 * associating and suspending, and receive an association response 6468 * after cfg80211 has checked if it needs to disconnect, but before 6469 * we actually set the flag to drop incoming frames. This will then 6470 * cause the workqueue flush to process the association response in 6471 * the suspend, resulting in a successful association just before it 6472 * tries to remove the interface from the driver, which now though 6473 * has a channel context assigned ... this results in issues. 6474 * 6475 * To work around this (for now) simply deauth here again if we're 6476 * now connected. 6477 */ 6478 if (ifmgd->associated && !sdata->local->wowlan) { 6479 u8 bssid[ETH_ALEN]; 6480 struct cfg80211_deauth_request req = { 6481 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6482 .bssid = bssid, 6483 }; 6484 6485 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6486 ieee80211_mgd_deauth(sdata, &req); 6487 } 6488 6489 sdata_unlock(sdata); 6490 } 6491 #endif 6492 6493 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6494 { 6495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6496 6497 sdata_lock(sdata); 6498 if (!ifmgd->associated) { 6499 sdata_unlock(sdata); 6500 return; 6501 } 6502 6503 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6504 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6505 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6506 ieee80211_sta_connection_lost(sdata, 6507 WLAN_REASON_UNSPECIFIED, 6508 true); 6509 sdata_unlock(sdata); 6510 return; 6511 } 6512 6513 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6514 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6515 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6516 ieee80211_sta_connection_lost(sdata, 6517 WLAN_REASON_UNSPECIFIED, 6518 true); 6519 sdata_unlock(sdata); 6520 return; 6521 } 6522 6523 sdata_unlock(sdata); 6524 } 6525 6526 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6527 { 6528 struct ieee80211_link_data *link = 6529 container_of(work, struct ieee80211_link_data, 6530 u.mgd.request_smps_work); 6531 6532 sdata_lock(link->sdata); 6533 __ieee80211_request_smps_mgd(link->sdata, link, 6534 link->u.mgd.driver_smps_mode); 6535 sdata_unlock(link->sdata); 6536 } 6537 6538 /* interface setup */ 6539 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6540 { 6541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6542 6543 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6544 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6545 ieee80211_beacon_connection_loss_work); 6546 INIT_WORK(&ifmgd->csa_connection_drop_work, 6547 ieee80211_csa_connection_drop_work); 6548 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6549 ieee80211_tdls_peer_del_work); 6550 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6551 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6552 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6553 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6554 ieee80211_sta_handle_tspec_ac_params_wk); 6555 6556 ifmgd->flags = 0; 6557 ifmgd->powersave = sdata->wdev.ps; 6558 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6559 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6560 /* Setup TDLS data */ 6561 spin_lock_init(&ifmgd->teardown_lock); 6562 ifmgd->teardown_skb = NULL; 6563 ifmgd->orig_teardown_skb = NULL; 6564 } 6565 6566 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6567 { 6568 struct ieee80211_sub_if_data *sdata = link->sdata; 6569 struct ieee80211_local *local = sdata->local; 6570 unsigned int link_id = link->link_id; 6571 6572 link->u.mgd.p2p_noa_index = -1; 6573 link->u.mgd.conn_flags = 0; 6574 link->conf->bssid = link->u.mgd.bssid; 6575 6576 INIT_WORK(&link->u.mgd.request_smps_work, 6577 ieee80211_request_smps_mgd_work); 6578 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6579 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6580 else 6581 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6582 6583 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6584 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6585 6586 if (sdata->u.mgd.assoc_data) 6587 ether_addr_copy(link->conf->addr, 6588 sdata->u.mgd.assoc_data->link[link_id].addr); 6589 else if (!is_valid_ether_addr(link->conf->addr)) 6590 eth_random_addr(link->conf->addr); 6591 } 6592 6593 /* scan finished notification */ 6594 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6595 { 6596 struct ieee80211_sub_if_data *sdata; 6597 6598 /* Restart STA timers */ 6599 rcu_read_lock(); 6600 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6601 if (ieee80211_sdata_running(sdata)) 6602 ieee80211_restart_sta_timer(sdata); 6603 } 6604 rcu_read_unlock(); 6605 } 6606 6607 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6608 struct cfg80211_bss *cbss, s8 link_id, 6609 const u8 *ap_mld_addr, bool assoc, 6610 bool override) 6611 { 6612 struct ieee80211_local *local = sdata->local; 6613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6614 struct ieee80211_bss *bss = (void *)cbss->priv; 6615 struct sta_info *new_sta = NULL; 6616 struct ieee80211_link_data *link; 6617 bool have_sta = false; 6618 bool mlo; 6619 int err; 6620 6621 if (link_id >= 0) { 6622 mlo = true; 6623 if (WARN_ON(!ap_mld_addr)) 6624 return -EINVAL; 6625 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6626 } else { 6627 if (WARN_ON(ap_mld_addr)) 6628 return -EINVAL; 6629 ap_mld_addr = cbss->bssid; 6630 err = ieee80211_vif_set_links(sdata, 0); 6631 link_id = 0; 6632 mlo = false; 6633 } 6634 6635 if (err) 6636 return err; 6637 6638 link = sdata_dereference(sdata->link[link_id], sdata); 6639 if (WARN_ON(!link)) { 6640 err = -ENOLINK; 6641 goto out_err; 6642 } 6643 6644 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6645 err = -EINVAL; 6646 goto out_err; 6647 } 6648 6649 /* If a reconfig is happening, bail out */ 6650 if (local->in_reconfig) { 6651 err = -EBUSY; 6652 goto out_err; 6653 } 6654 6655 if (assoc) { 6656 rcu_read_lock(); 6657 have_sta = sta_info_get(sdata, ap_mld_addr); 6658 rcu_read_unlock(); 6659 } 6660 6661 if (!have_sta) { 6662 if (mlo) 6663 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6664 link_id, cbss->bssid, 6665 GFP_KERNEL); 6666 else 6667 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6668 6669 if (!new_sta) { 6670 err = -ENOMEM; 6671 goto out_err; 6672 } 6673 6674 new_sta->sta.mlo = mlo; 6675 } 6676 6677 /* 6678 * Set up the information for the new channel before setting the 6679 * new channel. We can't - completely race-free - change the basic 6680 * rates bitmap and the channel (sband) that it refers to, but if 6681 * we set it up before we at least avoid calling into the driver's 6682 * bss_info_changed() method with invalid information (since we do 6683 * call that from changing the channel - only for IDLE and perhaps 6684 * some others, but ...). 6685 * 6686 * So to avoid that, just set up all the new information before the 6687 * channel, but tell the driver to apply it only afterwards, since 6688 * it might need the new channel for that. 6689 */ 6690 if (new_sta) { 6691 const struct cfg80211_bss_ies *ies; 6692 struct link_sta_info *link_sta; 6693 6694 rcu_read_lock(); 6695 link_sta = rcu_dereference(new_sta->link[link_id]); 6696 if (WARN_ON(!link_sta)) { 6697 rcu_read_unlock(); 6698 sta_info_free(local, new_sta); 6699 err = -EINVAL; 6700 goto out_err; 6701 } 6702 6703 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6704 link_sta, cbss); 6705 if (err) { 6706 rcu_read_unlock(); 6707 sta_info_free(local, new_sta); 6708 goto out_err; 6709 } 6710 6711 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6712 6713 /* set timing information */ 6714 link->conf->beacon_int = cbss->beacon_interval; 6715 ies = rcu_dereference(cbss->beacon_ies); 6716 if (ies) { 6717 link->conf->sync_tsf = ies->tsf; 6718 link->conf->sync_device_ts = 6719 bss->device_ts_beacon; 6720 6721 ieee80211_get_dtim(ies, 6722 &link->conf->sync_dtim_count, 6723 NULL); 6724 } else if (!ieee80211_hw_check(&sdata->local->hw, 6725 TIMING_BEACON_ONLY)) { 6726 ies = rcu_dereference(cbss->proberesp_ies); 6727 /* must be non-NULL since beacon IEs were NULL */ 6728 link->conf->sync_tsf = ies->tsf; 6729 link->conf->sync_device_ts = 6730 bss->device_ts_presp; 6731 link->conf->sync_dtim_count = 0; 6732 } else { 6733 link->conf->sync_tsf = 0; 6734 link->conf->sync_device_ts = 0; 6735 link->conf->sync_dtim_count = 0; 6736 } 6737 rcu_read_unlock(); 6738 } 6739 6740 if (new_sta || override) { 6741 err = ieee80211_prep_channel(sdata, link, cbss, 6742 &link->u.mgd.conn_flags); 6743 if (err) { 6744 if (new_sta) 6745 sta_info_free(local, new_sta); 6746 goto out_err; 6747 } 6748 } 6749 6750 if (new_sta) { 6751 /* 6752 * tell driver about BSSID, basic rates and timing 6753 * this was set up above, before setting the channel 6754 */ 6755 ieee80211_link_info_change_notify(sdata, link, 6756 BSS_CHANGED_BSSID | 6757 BSS_CHANGED_BASIC_RATES | 6758 BSS_CHANGED_BEACON_INT); 6759 6760 if (assoc) 6761 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6762 6763 err = sta_info_insert(new_sta); 6764 new_sta = NULL; 6765 if (err) { 6766 sdata_info(sdata, 6767 "failed to insert STA entry for the AP (error %d)\n", 6768 err); 6769 goto out_err; 6770 } 6771 } else 6772 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6773 6774 /* Cancel scan to ensure that nothing interferes with connection */ 6775 if (local->scanning) 6776 ieee80211_scan_cancel(local); 6777 6778 return 0; 6779 6780 out_err: 6781 ieee80211_link_release_channel(&sdata->deflink); 6782 ieee80211_vif_set_links(sdata, 0); 6783 return err; 6784 } 6785 6786 /* config hooks */ 6787 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6788 struct cfg80211_auth_request *req) 6789 { 6790 struct ieee80211_local *local = sdata->local; 6791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6792 struct ieee80211_mgd_auth_data *auth_data; 6793 u16 auth_alg; 6794 int err; 6795 bool cont_auth; 6796 6797 /* prepare auth data structure */ 6798 6799 switch (req->auth_type) { 6800 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6801 auth_alg = WLAN_AUTH_OPEN; 6802 break; 6803 case NL80211_AUTHTYPE_SHARED_KEY: 6804 if (fips_enabled) 6805 return -EOPNOTSUPP; 6806 auth_alg = WLAN_AUTH_SHARED_KEY; 6807 break; 6808 case NL80211_AUTHTYPE_FT: 6809 auth_alg = WLAN_AUTH_FT; 6810 break; 6811 case NL80211_AUTHTYPE_NETWORK_EAP: 6812 auth_alg = WLAN_AUTH_LEAP; 6813 break; 6814 case NL80211_AUTHTYPE_SAE: 6815 auth_alg = WLAN_AUTH_SAE; 6816 break; 6817 case NL80211_AUTHTYPE_FILS_SK: 6818 auth_alg = WLAN_AUTH_FILS_SK; 6819 break; 6820 case NL80211_AUTHTYPE_FILS_SK_PFS: 6821 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6822 break; 6823 case NL80211_AUTHTYPE_FILS_PK: 6824 auth_alg = WLAN_AUTH_FILS_PK; 6825 break; 6826 default: 6827 return -EOPNOTSUPP; 6828 } 6829 6830 if (ifmgd->assoc_data) 6831 return -EBUSY; 6832 6833 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6834 req->ie_len, GFP_KERNEL); 6835 if (!auth_data) 6836 return -ENOMEM; 6837 6838 memcpy(auth_data->ap_addr, 6839 req->ap_mld_addr ?: req->bss->bssid, 6840 ETH_ALEN); 6841 auth_data->bss = req->bss; 6842 auth_data->link_id = req->link_id; 6843 6844 if (req->auth_data_len >= 4) { 6845 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6846 __le16 *pos = (__le16 *) req->auth_data; 6847 6848 auth_data->sae_trans = le16_to_cpu(pos[0]); 6849 auth_data->sae_status = le16_to_cpu(pos[1]); 6850 } 6851 memcpy(auth_data->data, req->auth_data + 4, 6852 req->auth_data_len - 4); 6853 auth_data->data_len += req->auth_data_len - 4; 6854 } 6855 6856 /* Check if continuing authentication or trying to authenticate with the 6857 * same BSS that we were in the process of authenticating with and avoid 6858 * removal and re-addition of the STA entry in 6859 * ieee80211_prep_connection(). 6860 */ 6861 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6862 ifmgd->auth_data->link_id == req->link_id; 6863 6864 if (req->ie && req->ie_len) { 6865 memcpy(&auth_data->data[auth_data->data_len], 6866 req->ie, req->ie_len); 6867 auth_data->data_len += req->ie_len; 6868 } 6869 6870 if (req->key && req->key_len) { 6871 auth_data->key_len = req->key_len; 6872 auth_data->key_idx = req->key_idx; 6873 memcpy(auth_data->key, req->key, req->key_len); 6874 } 6875 6876 auth_data->algorithm = auth_alg; 6877 6878 /* try to authenticate/probe */ 6879 6880 if (ifmgd->auth_data) { 6881 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6882 auth_data->peer_confirmed = 6883 ifmgd->auth_data->peer_confirmed; 6884 } 6885 ieee80211_destroy_auth_data(sdata, cont_auth); 6886 } 6887 6888 /* prep auth_data so we don't go into idle on disassoc */ 6889 ifmgd->auth_data = auth_data; 6890 6891 /* If this is continuation of an ongoing SAE authentication exchange 6892 * (i.e., request to send SAE Confirm) and the peer has already 6893 * confirmed, mark authentication completed since we are about to send 6894 * out SAE Confirm. 6895 */ 6896 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6897 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6898 ieee80211_mark_sta_auth(sdata); 6899 6900 if (ifmgd->associated) { 6901 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6902 6903 sdata_info(sdata, 6904 "disconnect from AP %pM for new auth to %pM\n", 6905 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6906 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6907 WLAN_REASON_UNSPECIFIED, 6908 false, frame_buf); 6909 6910 ieee80211_report_disconnect(sdata, frame_buf, 6911 sizeof(frame_buf), true, 6912 WLAN_REASON_UNSPECIFIED, 6913 false); 6914 } 6915 6916 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6917 6918 /* needed for transmitting the auth frame(s) properly */ 6919 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6920 6921 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6922 req->ap_mld_addr, cont_auth, false); 6923 if (err) 6924 goto err_clear; 6925 6926 err = ieee80211_auth(sdata); 6927 if (err) { 6928 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6929 goto err_clear; 6930 } 6931 6932 /* hold our own reference */ 6933 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6934 return 0; 6935 6936 err_clear: 6937 if (!sdata->vif.valid_links) { 6938 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6939 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6940 BSS_CHANGED_BSSID); 6941 mutex_lock(&sdata->local->mtx); 6942 ieee80211_link_release_channel(&sdata->deflink); 6943 mutex_unlock(&sdata->local->mtx); 6944 } 6945 ifmgd->auth_data = NULL; 6946 kfree(auth_data); 6947 return err; 6948 } 6949 6950 static ieee80211_conn_flags_t 6951 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6952 struct ieee80211_mgd_assoc_data *assoc_data, 6953 struct cfg80211_assoc_request *req, 6954 ieee80211_conn_flags_t conn_flags, 6955 unsigned int link_id) 6956 { 6957 struct ieee80211_local *local = sdata->local; 6958 const struct cfg80211_bss_ies *beacon_ies; 6959 struct ieee80211_supported_band *sband; 6960 const struct element *ht_elem, *vht_elem; 6961 struct ieee80211_link_data *link; 6962 struct cfg80211_bss *cbss; 6963 struct ieee80211_bss *bss; 6964 bool is_5ghz, is_6ghz; 6965 6966 cbss = assoc_data->link[link_id].bss; 6967 if (WARN_ON(!cbss)) 6968 return 0; 6969 6970 bss = (void *)cbss->priv; 6971 6972 sband = local->hw.wiphy->bands[cbss->channel->band]; 6973 if (WARN_ON(!sband)) 6974 return 0; 6975 6976 link = sdata_dereference(sdata->link[link_id], sdata); 6977 if (WARN_ON(!link)) 6978 return 0; 6979 6980 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6981 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6982 6983 /* for MLO connections assume advertising all rates is OK */ 6984 if (!req->ap_mld_addr) { 6985 assoc_data->supp_rates = bss->supp_rates; 6986 assoc_data->supp_rates_len = bss->supp_rates_len; 6987 } 6988 6989 /* copy and link elems for the STA profile */ 6990 if (req->links[link_id].elems_len) { 6991 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6992 req->links[link_id].elems_len); 6993 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6994 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6995 assoc_data->ie_pos += req->links[link_id].elems_len; 6996 } 6997 6998 rcu_read_lock(); 6999 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7000 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7001 assoc_data->link[link_id].ap_ht_param = 7002 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7003 else if (!is_6ghz) 7004 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7005 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7006 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7007 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7008 sizeof(struct ieee80211_vht_cap)); 7009 } else if (is_5ghz) { 7010 link_info(link, 7011 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7012 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7013 IEEE80211_CONN_DISABLE_HE | 7014 IEEE80211_CONN_DISABLE_EHT; 7015 } 7016 rcu_read_unlock(); 7017 7018 link->u.mgd.beacon_crc_valid = false; 7019 link->u.mgd.dtim_period = 0; 7020 link->u.mgd.have_beacon = false; 7021 7022 /* override HT/VHT configuration only if the AP and we support it */ 7023 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7024 struct ieee80211_sta_ht_cap sta_ht_cap; 7025 7026 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7027 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7028 } 7029 7030 link->conf->eht_puncturing = 0; 7031 7032 rcu_read_lock(); 7033 beacon_ies = rcu_dereference(cbss->beacon_ies); 7034 if (beacon_ies) { 7035 const struct ieee80211_eht_operation *eht_oper; 7036 const struct element *elem; 7037 u8 dtim_count = 0; 7038 7039 ieee80211_get_dtim(beacon_ies, &dtim_count, 7040 &link->u.mgd.dtim_period); 7041 7042 sdata->deflink.u.mgd.have_beacon = true; 7043 7044 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7045 link->conf->sync_tsf = beacon_ies->tsf; 7046 link->conf->sync_device_ts = bss->device_ts_beacon; 7047 link->conf->sync_dtim_count = dtim_count; 7048 } 7049 7050 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7051 beacon_ies->data, beacon_ies->len); 7052 if (elem && elem->datalen >= 3) 7053 link->conf->profile_periodicity = elem->data[2]; 7054 else 7055 link->conf->profile_periodicity = 0; 7056 7057 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7058 beacon_ies->data, beacon_ies->len); 7059 if (elem && elem->datalen >= 11 && 7060 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7061 link->conf->ema_ap = true; 7062 else 7063 link->conf->ema_ap = false; 7064 7065 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7066 beacon_ies->data, beacon_ies->len); 7067 eht_oper = (const void *)(elem->data + 1); 7068 7069 if (elem && 7070 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7071 elem->datalen - 1) && 7072 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7073 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7074 const struct ieee80211_eht_operation_info *info = 7075 (void *)eht_oper->optional; 7076 const u8 *disable_subchannel_bitmap = info->optional; 7077 u16 bitmap; 7078 7079 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7080 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7081 &link->conf->chandef)) 7082 ieee80211_handle_puncturing_bitmap(link, 7083 eht_oper, 7084 bitmap, 7085 NULL); 7086 else 7087 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7088 } 7089 } 7090 rcu_read_unlock(); 7091 7092 if (bss->corrupt_data) { 7093 char *corrupt_type = "data"; 7094 7095 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7096 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7097 corrupt_type = "beacon and probe response"; 7098 else 7099 corrupt_type = "beacon"; 7100 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7101 corrupt_type = "probe response"; 7102 } 7103 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7104 cbss->bssid, corrupt_type); 7105 } 7106 7107 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7108 if (sdata->u.mgd.powersave) 7109 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7110 else 7111 link->smps_mode = IEEE80211_SMPS_OFF; 7112 } else { 7113 link->smps_mode = link->u.mgd.req_smps; 7114 } 7115 7116 return conn_flags; 7117 } 7118 7119 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7120 struct cfg80211_assoc_request *req) 7121 { 7122 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7123 struct ieee80211_local *local = sdata->local; 7124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7125 struct ieee80211_mgd_assoc_data *assoc_data; 7126 const struct element *ssid_elem; 7127 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7128 ieee80211_conn_flags_t conn_flags = 0; 7129 struct ieee80211_link_data *link; 7130 struct cfg80211_bss *cbss; 7131 struct ieee80211_bss *bss; 7132 bool override; 7133 int i, err; 7134 size_t size = sizeof(*assoc_data) + req->ie_len; 7135 7136 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7137 size += req->links[i].elems_len; 7138 7139 /* FIXME: no support for 4-addr MLO yet */ 7140 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7141 return -EOPNOTSUPP; 7142 7143 assoc_data = kzalloc(size, GFP_KERNEL); 7144 if (!assoc_data) 7145 return -ENOMEM; 7146 7147 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7148 7149 rcu_read_lock(); 7150 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7151 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7152 rcu_read_unlock(); 7153 kfree(assoc_data); 7154 return -EINVAL; 7155 } 7156 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7157 assoc_data->ssid_len = ssid_elem->datalen; 7158 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7159 vif_cfg->ssid_len = assoc_data->ssid_len; 7160 rcu_read_unlock(); 7161 7162 if (req->ap_mld_addr) { 7163 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7164 if (!req->links[i].bss) 7165 continue; 7166 link = sdata_dereference(sdata->link[i], sdata); 7167 if (link) 7168 ether_addr_copy(assoc_data->link[i].addr, 7169 link->conf->addr); 7170 else 7171 eth_random_addr(assoc_data->link[i].addr); 7172 } 7173 } else { 7174 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7175 } 7176 7177 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7178 7179 memcpy(assoc_data->ap_addr, 7180 req->ap_mld_addr ?: req->bss->bssid, 7181 ETH_ALEN); 7182 7183 if (ifmgd->associated) { 7184 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7185 7186 sdata_info(sdata, 7187 "disconnect from AP %pM for new assoc to %pM\n", 7188 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7189 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7190 WLAN_REASON_UNSPECIFIED, 7191 false, frame_buf); 7192 7193 ieee80211_report_disconnect(sdata, frame_buf, 7194 sizeof(frame_buf), true, 7195 WLAN_REASON_UNSPECIFIED, 7196 false); 7197 } 7198 7199 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7200 err = -EBUSY; 7201 goto err_free; 7202 } 7203 7204 if (ifmgd->assoc_data) { 7205 err = -EBUSY; 7206 goto err_free; 7207 } 7208 7209 if (ifmgd->auth_data) { 7210 bool match; 7211 7212 /* keep sta info, bssid if matching */ 7213 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7214 assoc_data->ap_addr) && 7215 ifmgd->auth_data->link_id == req->link_id; 7216 ieee80211_destroy_auth_data(sdata, match); 7217 } 7218 7219 /* prepare assoc data */ 7220 7221 bss = (void *)cbss->priv; 7222 assoc_data->wmm = bss->wmm_used && 7223 (local->hw.queues >= IEEE80211_NUM_ACS); 7224 7225 /* 7226 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7227 * We still associate in non-HT mode (11a/b/g) if any one of these 7228 * ciphers is configured as pairwise. 7229 * We can set this to true for non-11n hardware, that'll be checked 7230 * separately along with the peer capabilities. 7231 */ 7232 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7233 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7234 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7235 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7236 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7237 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7238 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7239 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7240 netdev_info(sdata->dev, 7241 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7242 } 7243 } 7244 7245 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7246 if (!bss->wmm_used) { 7247 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7248 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7249 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7250 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7251 netdev_info(sdata->dev, 7252 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7253 } 7254 7255 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7256 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7257 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7258 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7259 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7260 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7261 } 7262 7263 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7264 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7265 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7266 } 7267 7268 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7269 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7270 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7271 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7272 } 7273 7274 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7275 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7276 7277 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7278 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7279 sizeof(ifmgd->ht_capa_mask)); 7280 7281 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7282 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7283 sizeof(ifmgd->vht_capa_mask)); 7284 7285 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7286 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7287 sizeof(ifmgd->s1g_capa_mask)); 7288 7289 if (req->ie && req->ie_len) { 7290 memcpy(assoc_data->ie, req->ie, req->ie_len); 7291 assoc_data->ie_len = req->ie_len; 7292 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7293 } else { 7294 assoc_data->ie_pos = assoc_data->ie; 7295 } 7296 7297 if (req->fils_kek) { 7298 /* should already be checked in cfg80211 - so warn */ 7299 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7300 err = -EINVAL; 7301 goto err_free; 7302 } 7303 memcpy(assoc_data->fils_kek, req->fils_kek, 7304 req->fils_kek_len); 7305 assoc_data->fils_kek_len = req->fils_kek_len; 7306 } 7307 7308 if (req->fils_nonces) 7309 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7310 2 * FILS_NONCE_LEN); 7311 7312 /* default timeout */ 7313 assoc_data->timeout = jiffies; 7314 assoc_data->timeout_started = true; 7315 7316 assoc_data->assoc_link_id = assoc_link_id; 7317 7318 if (req->ap_mld_addr) { 7319 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7320 assoc_data->link[i].conn_flags = conn_flags; 7321 assoc_data->link[i].bss = req->links[i].bss; 7322 } 7323 7324 /* if there was no authentication, set up the link */ 7325 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7326 if (err) 7327 goto err_clear; 7328 } else { 7329 assoc_data->link[0].conn_flags = conn_flags; 7330 assoc_data->link[0].bss = cbss; 7331 } 7332 7333 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7334 if (WARN_ON(!link)) { 7335 err = -EINVAL; 7336 goto err_clear; 7337 } 7338 7339 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7340 conn_flags |= link->u.mgd.conn_flags; 7341 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7342 conn_flags, assoc_link_id); 7343 override = link->u.mgd.conn_flags != conn_flags; 7344 link->u.mgd.conn_flags |= conn_flags; 7345 7346 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7347 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7348 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7349 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7350 7351 if (bss->wmm_used && bss->uapsd_supported && 7352 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7353 assoc_data->uapsd = true; 7354 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7355 } else { 7356 assoc_data->uapsd = false; 7357 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7358 } 7359 7360 if (req->prev_bssid) 7361 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7362 7363 if (req->use_mfp) { 7364 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7365 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7366 } else { 7367 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7368 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7369 } 7370 7371 if (req->flags & ASSOC_REQ_USE_RRM) 7372 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7373 else 7374 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7375 7376 if (req->crypto.control_port) 7377 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7378 else 7379 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7380 7381 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7382 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7383 sdata->control_port_over_nl80211 = 7384 req->crypto.control_port_over_nl80211; 7385 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7386 7387 /* kick off associate process */ 7388 ifmgd->assoc_data = assoc_data; 7389 7390 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7391 if (!assoc_data->link[i].bss) 7392 continue; 7393 if (i == assoc_data->assoc_link_id) 7394 continue; 7395 /* only calculate the flags, hence link == NULL */ 7396 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7397 &assoc_data->link[i].conn_flags); 7398 if (err) 7399 goto err_clear; 7400 } 7401 7402 /* needed for transmitting the assoc frames properly */ 7403 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7404 7405 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7406 req->ap_mld_addr, true, override); 7407 if (err) 7408 goto err_clear; 7409 7410 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7411 link->u.mgd.conn_flags; 7412 7413 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7414 const struct cfg80211_bss_ies *beacon_ies; 7415 7416 rcu_read_lock(); 7417 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7418 7419 if (beacon_ies) { 7420 /* 7421 * Wait up to one beacon interval ... 7422 * should this be more if we miss one? 7423 */ 7424 sdata_info(sdata, "waiting for beacon from %pM\n", 7425 link->u.mgd.bssid); 7426 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7427 assoc_data->timeout_started = true; 7428 assoc_data->need_beacon = true; 7429 } 7430 rcu_read_unlock(); 7431 } 7432 7433 run_again(sdata, assoc_data->timeout); 7434 7435 return 0; 7436 err_clear: 7437 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7438 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7439 BSS_CHANGED_BSSID); 7440 ifmgd->assoc_data = NULL; 7441 err_free: 7442 kfree(assoc_data); 7443 return err; 7444 } 7445 7446 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7447 struct cfg80211_deauth_request *req) 7448 { 7449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7450 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7451 bool tx = !req->local_state_change; 7452 struct ieee80211_prep_tx_info info = { 7453 .subtype = IEEE80211_STYPE_DEAUTH, 7454 }; 7455 7456 if (ifmgd->auth_data && 7457 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7458 sdata_info(sdata, 7459 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7460 req->bssid, req->reason_code, 7461 ieee80211_get_reason_code_string(req->reason_code)); 7462 7463 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7464 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7465 IEEE80211_STYPE_DEAUTH, 7466 req->reason_code, tx, 7467 frame_buf); 7468 ieee80211_destroy_auth_data(sdata, false); 7469 ieee80211_report_disconnect(sdata, frame_buf, 7470 sizeof(frame_buf), true, 7471 req->reason_code, false); 7472 drv_mgd_complete_tx(sdata->local, sdata, &info); 7473 return 0; 7474 } 7475 7476 if (ifmgd->assoc_data && 7477 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7478 sdata_info(sdata, 7479 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7480 req->bssid, req->reason_code, 7481 ieee80211_get_reason_code_string(req->reason_code)); 7482 7483 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7484 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7485 IEEE80211_STYPE_DEAUTH, 7486 req->reason_code, tx, 7487 frame_buf); 7488 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7489 ieee80211_report_disconnect(sdata, frame_buf, 7490 sizeof(frame_buf), true, 7491 req->reason_code, false); 7492 return 0; 7493 } 7494 7495 if (ifmgd->associated && 7496 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7497 sdata_info(sdata, 7498 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7499 req->bssid, req->reason_code, 7500 ieee80211_get_reason_code_string(req->reason_code)); 7501 7502 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7503 req->reason_code, tx, frame_buf); 7504 ieee80211_report_disconnect(sdata, frame_buf, 7505 sizeof(frame_buf), true, 7506 req->reason_code, false); 7507 drv_mgd_complete_tx(sdata->local, sdata, &info); 7508 return 0; 7509 } 7510 7511 return -ENOTCONN; 7512 } 7513 7514 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7515 struct cfg80211_disassoc_request *req) 7516 { 7517 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7518 7519 if (!sdata->u.mgd.associated || 7520 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7521 return -ENOTCONN; 7522 7523 sdata_info(sdata, 7524 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7525 req->ap_addr, req->reason_code, 7526 ieee80211_get_reason_code_string(req->reason_code)); 7527 7528 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7529 req->reason_code, !req->local_state_change, 7530 frame_buf); 7531 7532 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7533 req->reason_code, false); 7534 7535 return 0; 7536 } 7537 7538 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7539 { 7540 cancel_work_sync(&link->u.mgd.request_smps_work); 7541 cancel_work_sync(&link->u.mgd.chswitch_work); 7542 } 7543 7544 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7545 { 7546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7547 7548 /* 7549 * Make sure some work items will not run after this, 7550 * they will not do anything but might not have been 7551 * cancelled when disconnecting. 7552 */ 7553 cancel_work_sync(&ifmgd->monitor_work); 7554 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7555 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7556 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7557 7558 sdata_lock(sdata); 7559 if (ifmgd->assoc_data) 7560 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7561 if (ifmgd->auth_data) 7562 ieee80211_destroy_auth_data(sdata, false); 7563 spin_lock_bh(&ifmgd->teardown_lock); 7564 if (ifmgd->teardown_skb) { 7565 kfree_skb(ifmgd->teardown_skb); 7566 ifmgd->teardown_skb = NULL; 7567 ifmgd->orig_teardown_skb = NULL; 7568 } 7569 kfree(ifmgd->assoc_req_ies); 7570 ifmgd->assoc_req_ies = NULL; 7571 ifmgd->assoc_req_ies_len = 0; 7572 spin_unlock_bh(&ifmgd->teardown_lock); 7573 del_timer_sync(&ifmgd->timer); 7574 sdata_unlock(sdata); 7575 } 7576 7577 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7578 enum nl80211_cqm_rssi_threshold_event rssi_event, 7579 s32 rssi_level, 7580 gfp_t gfp) 7581 { 7582 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7583 7584 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7585 7586 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7587 } 7588 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7589 7590 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7591 { 7592 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7593 7594 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7595 7596 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7597 } 7598 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7599 7600 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7601 int rssi_min_thold, 7602 int rssi_max_thold) 7603 { 7604 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7605 7606 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7607 return; 7608 7609 /* 7610 * Scale up threshold values before storing it, as the RSSI averaging 7611 * algorithm uses a scaled up value as well. Change this scaling 7612 * factor if the RSSI averaging algorithm changes. 7613 */ 7614 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7615 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7616 } 7617 7618 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7619 int rssi_min_thold, 7620 int rssi_max_thold) 7621 { 7622 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7623 7624 WARN_ON(rssi_min_thold == rssi_max_thold || 7625 rssi_min_thold > rssi_max_thold); 7626 7627 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7628 rssi_max_thold); 7629 } 7630 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7631 7632 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7633 { 7634 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7635 7636 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7637 } 7638 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7639