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 IEEE80211_MLE_SUBELEM_FRAGMENT); 1377 } 1378 1379 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1380 } 1381 1382 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1383 { 1384 struct ieee80211_local *local = sdata->local; 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1387 struct ieee80211_link_data *link; 1388 struct sk_buff *skb; 1389 struct ieee80211_mgmt *mgmt; 1390 u8 *pos, qos_info, *ie_start; 1391 size_t offset, noffset; 1392 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1393 __le16 listen_int; 1394 struct element *ext_capa = NULL; 1395 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1396 struct ieee80211_prep_tx_info info = {}; 1397 unsigned int link_id, n_links = 0; 1398 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1399 void *capab_pos; 1400 size_t size; 1401 int ret; 1402 1403 /* we know it's writable, cast away the const */ 1404 if (assoc_data->ie_len) 1405 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1406 assoc_data->ie, 1407 assoc_data->ie_len); 1408 1409 sdata_assert_lock(sdata); 1410 1411 size = local->hw.extra_tx_headroom + 1412 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1413 2 + assoc_data->ssid_len + /* SSID */ 1414 assoc_data->ie_len + /* extra IEs */ 1415 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1416 9; /* WMM */ 1417 1418 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1419 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1420 const struct ieee80211_sband_iftype_data *iftd; 1421 struct ieee80211_supported_band *sband; 1422 1423 if (!cbss) 1424 continue; 1425 1426 sband = local->hw.wiphy->bands[cbss->channel->band]; 1427 1428 n_links++; 1429 /* add STA profile elements length */ 1430 size += assoc_data->link[link_id].elems_len; 1431 /* and supported rates length */ 1432 size += 4 + sband->n_bitrates; 1433 /* supported channels */ 1434 size += 2 + 2 * sband->n_channels; 1435 1436 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1437 if (iftd) 1438 size += iftd->vendor_elems.len; 1439 1440 /* power capability */ 1441 size += 4; 1442 1443 /* HT, VHT, HE, EHT */ 1444 size += 2 + sizeof(struct ieee80211_ht_cap); 1445 size += 2 + sizeof(struct ieee80211_vht_cap); 1446 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1447 sizeof(struct ieee80211_he_mcs_nss_supp) + 1448 IEEE80211_HE_PPE_THRES_MAX_LEN; 1449 1450 if (sband->band == NL80211_BAND_6GHZ) 1451 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1452 1453 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1454 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1455 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1456 1457 /* non-inheritance element */ 1458 size += 2 + 2 + PRESENT_ELEMS_MAX; 1459 1460 /* should be the same across all BSSes */ 1461 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1462 capab |= WLAN_CAPABILITY_PRIVACY; 1463 } 1464 1465 if (sdata->vif.valid_links) { 1466 /* consider the multi-link element with STA profile */ 1467 size += sizeof(struct ieee80211_multi_link_elem); 1468 /* max common info field in basic multi-link element */ 1469 size += sizeof(struct ieee80211_mle_basic_common_info) + 1470 2 + /* capa & op */ 1471 2; /* EML capa */ 1472 1473 /* 1474 * The capability elements were already considered above; 1475 * note this over-estimates a bit because there's no 1476 * STA profile for the assoc link. 1477 */ 1478 size += (n_links - 1) * 1479 (1 + 1 + /* subelement ID/length */ 1480 2 + /* STA control */ 1481 1 + ETH_ALEN + 2 /* STA Info field */); 1482 } 1483 1484 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1485 if (WARN_ON(!link)) 1486 return -EINVAL; 1487 1488 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1489 return -EINVAL; 1490 1491 skb = alloc_skb(size, GFP_KERNEL); 1492 if (!skb) 1493 return -ENOMEM; 1494 1495 skb_reserve(skb, local->hw.extra_tx_headroom); 1496 1497 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1498 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1499 1500 /* Set MBSSID support for HE AP if needed */ 1501 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1502 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1503 ext_capa && ext_capa->datalen >= 3) 1504 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1505 1506 mgmt = skb_put_zero(skb, 24); 1507 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1508 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1509 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1510 1511 listen_int = cpu_to_le16(assoc_data->s1g ? 1512 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1513 local->hw.conf.listen_interval); 1514 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1515 skb_put(skb, 10); 1516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1517 IEEE80211_STYPE_REASSOC_REQ); 1518 capab_pos = &mgmt->u.reassoc_req.capab_info; 1519 mgmt->u.reassoc_req.listen_interval = listen_int; 1520 memcpy(mgmt->u.reassoc_req.current_ap, 1521 assoc_data->prev_ap_addr, ETH_ALEN); 1522 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1523 } else { 1524 skb_put(skb, 4); 1525 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1526 IEEE80211_STYPE_ASSOC_REQ); 1527 capab_pos = &mgmt->u.assoc_req.capab_info; 1528 mgmt->u.assoc_req.listen_interval = listen_int; 1529 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1530 } 1531 1532 /* SSID */ 1533 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1534 ie_start = pos; 1535 *pos++ = WLAN_EID_SSID; 1536 *pos++ = assoc_data->ssid_len; 1537 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1538 1539 /* add the elements for the assoc (main) link */ 1540 link_capab = capab; 1541 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1542 ext_capa, 1543 assoc_data->ie, 1544 assoc_data->ie_len, 1545 assoc_data->assoc_link_id, link, 1546 present_elems); 1547 put_unaligned_le16(link_capab, capab_pos); 1548 1549 /* if present, add any custom non-vendor IEs */ 1550 if (assoc_data->ie_len) { 1551 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1552 assoc_data->ie_len, 1553 offset); 1554 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1555 offset = noffset; 1556 } 1557 1558 if (assoc_data->wmm) { 1559 if (assoc_data->uapsd) { 1560 qos_info = ifmgd->uapsd_queues; 1561 qos_info |= (ifmgd->uapsd_max_sp_len << 1562 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1563 } else { 1564 qos_info = 0; 1565 } 1566 1567 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1568 } 1569 1570 /* add any remaining custom (i.e. vendor specific here) IEs */ 1571 if (assoc_data->ie_len) { 1572 noffset = assoc_data->ie_len; 1573 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1574 } 1575 1576 if (assoc_data->fils_kek_len) { 1577 ret = fils_encrypt_assoc_req(skb, assoc_data); 1578 if (ret < 0) { 1579 dev_kfree_skb(skb); 1580 return ret; 1581 } 1582 } 1583 1584 pos = skb_tail_pointer(skb); 1585 kfree(ifmgd->assoc_req_ies); 1586 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1587 if (!ifmgd->assoc_req_ies) { 1588 dev_kfree_skb(skb); 1589 return -ENOMEM; 1590 } 1591 1592 ifmgd->assoc_req_ies_len = pos - ie_start; 1593 1594 drv_mgd_prepare_tx(local, sdata, &info); 1595 1596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1597 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1598 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1599 IEEE80211_TX_INTFL_MLME_CONN_TX; 1600 ieee80211_tx_skb(sdata, skb); 1601 1602 return 0; 1603 } 1604 1605 void ieee80211_send_pspoll(struct ieee80211_local *local, 1606 struct ieee80211_sub_if_data *sdata) 1607 { 1608 struct ieee80211_pspoll *pspoll; 1609 struct sk_buff *skb; 1610 1611 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1612 if (!skb) 1613 return; 1614 1615 pspoll = (struct ieee80211_pspoll *) skb->data; 1616 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1617 1618 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1619 ieee80211_tx_skb(sdata, skb); 1620 } 1621 1622 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1623 struct ieee80211_sub_if_data *sdata, 1624 bool powersave) 1625 { 1626 struct sk_buff *skb; 1627 struct ieee80211_hdr_3addr *nullfunc; 1628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1629 1630 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1631 !ieee80211_hw_check(&local->hw, 1632 DOESNT_SUPPORT_QOS_NDP)); 1633 if (!skb) 1634 return; 1635 1636 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1637 if (powersave) 1638 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1639 1640 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1641 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1642 1643 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1644 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1645 1646 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1647 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1648 1649 ieee80211_tx_skb(sdata, skb); 1650 } 1651 1652 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1653 struct ieee80211_sub_if_data *sdata) 1654 { 1655 struct sk_buff *skb; 1656 struct ieee80211_hdr *nullfunc; 1657 __le16 fc; 1658 1659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1660 return; 1661 1662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1663 if (!skb) 1664 return; 1665 1666 skb_reserve(skb, local->hw.extra_tx_headroom); 1667 1668 nullfunc = skb_put_zero(skb, 30); 1669 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1670 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1671 nullfunc->frame_control = fc; 1672 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1673 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1674 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1675 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1676 1677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1678 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1679 ieee80211_tx_skb(sdata, skb); 1680 } 1681 1682 /* spectrum management related things */ 1683 static void ieee80211_chswitch_work(struct work_struct *work) 1684 { 1685 struct ieee80211_link_data *link = 1686 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1687 struct ieee80211_sub_if_data *sdata = link->sdata; 1688 struct ieee80211_local *local = sdata->local; 1689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1690 int ret; 1691 1692 if (!ieee80211_sdata_running(sdata)) 1693 return; 1694 1695 sdata_lock(sdata); 1696 mutex_lock(&local->mtx); 1697 mutex_lock(&local->chanctx_mtx); 1698 1699 if (!ifmgd->associated) 1700 goto out; 1701 1702 if (!link->conf->csa_active) 1703 goto out; 1704 1705 /* 1706 * using reservation isn't immediate as it may be deferred until later 1707 * with multi-vif. once reservation is complete it will re-schedule the 1708 * work with no reserved_chanctx so verify chandef to check if it 1709 * completed successfully 1710 */ 1711 1712 if (link->reserved_chanctx) { 1713 /* 1714 * with multi-vif csa driver may call ieee80211_csa_finish() 1715 * many times while waiting for other interfaces to use their 1716 * reservations 1717 */ 1718 if (link->reserved_ready) 1719 goto out; 1720 1721 ret = ieee80211_link_use_reserved_context(link); 1722 if (ret) { 1723 sdata_info(sdata, 1724 "failed to use reserved channel context, disconnecting (err=%d)\n", 1725 ret); 1726 ieee80211_queue_work(&sdata->local->hw, 1727 &ifmgd->csa_connection_drop_work); 1728 goto out; 1729 } 1730 1731 goto out; 1732 } 1733 1734 if (!cfg80211_chandef_identical(&link->conf->chandef, 1735 &link->csa_chandef)) { 1736 sdata_info(sdata, 1737 "failed to finalize channel switch, disconnecting\n"); 1738 ieee80211_queue_work(&sdata->local->hw, 1739 &ifmgd->csa_connection_drop_work); 1740 goto out; 1741 } 1742 1743 link->u.mgd.csa_waiting_bcn = true; 1744 1745 ieee80211_sta_reset_beacon_monitor(sdata); 1746 ieee80211_sta_reset_conn_monitor(sdata); 1747 1748 out: 1749 mutex_unlock(&local->chanctx_mtx); 1750 mutex_unlock(&local->mtx); 1751 sdata_unlock(sdata); 1752 } 1753 1754 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1755 { 1756 struct ieee80211_sub_if_data *sdata = link->sdata; 1757 struct ieee80211_local *local = sdata->local; 1758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1759 int ret; 1760 1761 sdata_assert_lock(sdata); 1762 1763 WARN_ON(!link->conf->csa_active); 1764 1765 if (link->csa_block_tx) { 1766 ieee80211_wake_vif_queues(local, sdata, 1767 IEEE80211_QUEUE_STOP_REASON_CSA); 1768 link->csa_block_tx = false; 1769 } 1770 1771 link->conf->csa_active = false; 1772 link->u.mgd.csa_waiting_bcn = false; 1773 /* 1774 * If the CSA IE is still present on the beacon after the switch, 1775 * we need to consider it as a new CSA (possibly to self). 1776 */ 1777 link->u.mgd.beacon_crc_valid = false; 1778 1779 ret = drv_post_channel_switch(sdata); 1780 if (ret) { 1781 sdata_info(sdata, 1782 "driver post channel switch failed, disconnecting\n"); 1783 ieee80211_queue_work(&local->hw, 1784 &ifmgd->csa_connection_drop_work); 1785 return; 1786 } 1787 1788 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1789 } 1790 1791 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1792 { 1793 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1795 1796 if (WARN_ON(sdata->vif.valid_links)) 1797 success = false; 1798 1799 trace_api_chswitch_done(sdata, success); 1800 if (!success) { 1801 sdata_info(sdata, 1802 "driver channel switch failed, disconnecting\n"); 1803 ieee80211_queue_work(&sdata->local->hw, 1804 &ifmgd->csa_connection_drop_work); 1805 } else { 1806 ieee80211_queue_work(&sdata->local->hw, 1807 &sdata->deflink.u.mgd.chswitch_work); 1808 } 1809 } 1810 EXPORT_SYMBOL(ieee80211_chswitch_done); 1811 1812 static void ieee80211_chswitch_timer(struct timer_list *t) 1813 { 1814 struct ieee80211_link_data *link = 1815 from_timer(link, t, u.mgd.chswitch_timer); 1816 1817 ieee80211_queue_work(&link->sdata->local->hw, 1818 &link->u.mgd.chswitch_work); 1819 } 1820 1821 static void 1822 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1823 { 1824 struct ieee80211_sub_if_data *sdata = link->sdata; 1825 struct ieee80211_local *local = sdata->local; 1826 1827 if (!local->ops->abort_channel_switch) 1828 return; 1829 1830 mutex_lock(&local->mtx); 1831 1832 mutex_lock(&local->chanctx_mtx); 1833 ieee80211_link_unreserve_chanctx(link); 1834 mutex_unlock(&local->chanctx_mtx); 1835 1836 if (link->csa_block_tx) 1837 ieee80211_wake_vif_queues(local, sdata, 1838 IEEE80211_QUEUE_STOP_REASON_CSA); 1839 1840 link->csa_block_tx = false; 1841 link->conf->csa_active = false; 1842 1843 mutex_unlock(&local->mtx); 1844 1845 drv_abort_channel_switch(sdata); 1846 } 1847 1848 static void 1849 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1850 u64 timestamp, u32 device_timestamp, 1851 struct ieee802_11_elems *elems, 1852 bool beacon) 1853 { 1854 struct ieee80211_sub_if_data *sdata = link->sdata; 1855 struct ieee80211_local *local = sdata->local; 1856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1857 struct cfg80211_bss *cbss = link->u.mgd.bss; 1858 struct ieee80211_chanctx_conf *conf; 1859 struct ieee80211_chanctx *chanctx; 1860 enum nl80211_band current_band; 1861 struct ieee80211_csa_ie csa_ie; 1862 struct ieee80211_channel_switch ch_switch; 1863 struct ieee80211_bss *bss; 1864 int res; 1865 1866 sdata_assert_lock(sdata); 1867 1868 if (!cbss) 1869 return; 1870 1871 if (local->scanning) 1872 return; 1873 1874 current_band = cbss->channel->band; 1875 bss = (void *)cbss->priv; 1876 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1877 bss->vht_cap_info, 1878 link->u.mgd.conn_flags, 1879 link->u.mgd.bssid, &csa_ie); 1880 1881 if (!res) { 1882 ch_switch.timestamp = timestamp; 1883 ch_switch.device_timestamp = device_timestamp; 1884 ch_switch.block_tx = csa_ie.mode; 1885 ch_switch.chandef = csa_ie.chandef; 1886 ch_switch.count = csa_ie.count; 1887 ch_switch.delay = csa_ie.max_switch_time; 1888 } 1889 1890 if (res < 0) 1891 goto lock_and_drop_connection; 1892 1893 if (beacon && link->conf->csa_active && 1894 !link->u.mgd.csa_waiting_bcn) { 1895 if (res) 1896 ieee80211_sta_abort_chanswitch(link); 1897 else 1898 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1899 return; 1900 } else if (link->conf->csa_active || res) { 1901 /* disregard subsequent announcements if already processing */ 1902 return; 1903 } 1904 1905 if (link->conf->chandef.chan->band != 1906 csa_ie.chandef.chan->band) { 1907 sdata_info(sdata, 1908 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1909 link->u.mgd.bssid, 1910 csa_ie.chandef.chan->center_freq, 1911 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1912 csa_ie.chandef.center_freq2); 1913 goto lock_and_drop_connection; 1914 } 1915 1916 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1917 IEEE80211_CHAN_DISABLED)) { 1918 sdata_info(sdata, 1919 "AP %pM switches to unsupported channel " 1920 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1921 "disconnecting\n", 1922 link->u.mgd.bssid, 1923 csa_ie.chandef.chan->center_freq, 1924 csa_ie.chandef.chan->freq_offset, 1925 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1926 csa_ie.chandef.freq1_offset, 1927 csa_ie.chandef.center_freq2); 1928 goto lock_and_drop_connection; 1929 } 1930 1931 if (cfg80211_chandef_identical(&csa_ie.chandef, 1932 &link->conf->chandef) && 1933 (!csa_ie.mode || !beacon)) { 1934 if (link->u.mgd.csa_ignored_same_chan) 1935 return; 1936 sdata_info(sdata, 1937 "AP %pM tries to chanswitch to same channel, ignore\n", 1938 link->u.mgd.bssid); 1939 link->u.mgd.csa_ignored_same_chan = true; 1940 return; 1941 } 1942 1943 /* 1944 * Drop all TDLS peers - either we disconnect or move to a different 1945 * channel from this point on. There's no telling what our peer will do. 1946 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1947 * have an incompatible wider chandef. 1948 */ 1949 ieee80211_teardown_tdls_peers(sdata); 1950 1951 mutex_lock(&local->mtx); 1952 mutex_lock(&local->chanctx_mtx); 1953 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1954 lockdep_is_held(&local->chanctx_mtx)); 1955 if (!conf) { 1956 sdata_info(sdata, 1957 "no channel context assigned to vif?, disconnecting\n"); 1958 goto drop_connection; 1959 } 1960 1961 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1962 1963 if (local->use_chanctx && 1964 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1965 sdata_info(sdata, 1966 "driver doesn't support chan-switch with channel contexts\n"); 1967 goto drop_connection; 1968 } 1969 1970 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1971 sdata_info(sdata, 1972 "preparing for channel switch failed, disconnecting\n"); 1973 goto drop_connection; 1974 } 1975 1976 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1977 chanctx->mode, false); 1978 if (res) { 1979 sdata_info(sdata, 1980 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1981 res); 1982 goto drop_connection; 1983 } 1984 mutex_unlock(&local->chanctx_mtx); 1985 1986 link->conf->csa_active = true; 1987 link->csa_chandef = csa_ie.chandef; 1988 link->csa_block_tx = csa_ie.mode; 1989 link->u.mgd.csa_ignored_same_chan = false; 1990 link->u.mgd.beacon_crc_valid = false; 1991 1992 if (link->csa_block_tx) 1993 ieee80211_stop_vif_queues(local, sdata, 1994 IEEE80211_QUEUE_STOP_REASON_CSA); 1995 mutex_unlock(&local->mtx); 1996 1997 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1998 csa_ie.count, csa_ie.mode, 0); 1999 2000 if (local->ops->channel_switch) { 2001 /* use driver's channel switch callback */ 2002 drv_channel_switch(local, sdata, &ch_switch); 2003 return; 2004 } 2005 2006 /* channel switch handled in software */ 2007 if (csa_ie.count <= 1) 2008 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 2009 else 2010 mod_timer(&link->u.mgd.chswitch_timer, 2011 TU_TO_EXP_TIME((csa_ie.count - 1) * 2012 cbss->beacon_interval)); 2013 return; 2014 lock_and_drop_connection: 2015 mutex_lock(&local->mtx); 2016 mutex_lock(&local->chanctx_mtx); 2017 drop_connection: 2018 /* 2019 * This is just so that the disconnect flow will know that 2020 * we were trying to switch channel and failed. In case the 2021 * mode is 1 (we are not allowed to Tx), we will know not to 2022 * send a deauthentication frame. Those two fields will be 2023 * reset when the disconnection worker runs. 2024 */ 2025 link->conf->csa_active = true; 2026 link->csa_block_tx = csa_ie.mode; 2027 2028 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 2029 mutex_unlock(&local->chanctx_mtx); 2030 mutex_unlock(&local->mtx); 2031 } 2032 2033 static bool 2034 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2035 struct ieee80211_channel *channel, 2036 const u8 *country_ie, u8 country_ie_len, 2037 const u8 *pwr_constr_elem, 2038 int *chan_pwr, int *pwr_reduction) 2039 { 2040 struct ieee80211_country_ie_triplet *triplet; 2041 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2042 int i, chan_increment; 2043 bool have_chan_pwr = false; 2044 2045 /* Invalid IE */ 2046 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2047 return false; 2048 2049 triplet = (void *)(country_ie + 3); 2050 country_ie_len -= 3; 2051 2052 switch (channel->band) { 2053 default: 2054 WARN_ON_ONCE(1); 2055 fallthrough; 2056 case NL80211_BAND_2GHZ: 2057 case NL80211_BAND_60GHZ: 2058 case NL80211_BAND_LC: 2059 chan_increment = 1; 2060 break; 2061 case NL80211_BAND_5GHZ: 2062 chan_increment = 4; 2063 break; 2064 case NL80211_BAND_6GHZ: 2065 /* 2066 * In the 6 GHz band, the "maximum transmit power level" 2067 * field in the triplets is reserved, and thus will be 2068 * zero and we shouldn't use it to control TX power. 2069 * The actual TX power will be given in the transmit 2070 * power envelope element instead. 2071 */ 2072 return false; 2073 } 2074 2075 /* find channel */ 2076 while (country_ie_len >= 3) { 2077 u8 first_channel = triplet->chans.first_channel; 2078 2079 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2080 goto next; 2081 2082 for (i = 0; i < triplet->chans.num_channels; i++) { 2083 if (first_channel + i * chan_increment == chan) { 2084 have_chan_pwr = true; 2085 *chan_pwr = triplet->chans.max_power; 2086 break; 2087 } 2088 } 2089 if (have_chan_pwr) 2090 break; 2091 2092 next: 2093 triplet++; 2094 country_ie_len -= 3; 2095 } 2096 2097 if (have_chan_pwr && pwr_constr_elem) 2098 *pwr_reduction = *pwr_constr_elem; 2099 else 2100 *pwr_reduction = 0; 2101 2102 return have_chan_pwr; 2103 } 2104 2105 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2106 struct ieee80211_channel *channel, 2107 const u8 *cisco_dtpc_ie, 2108 int *pwr_level) 2109 { 2110 /* From practical testing, the first data byte of the DTPC element 2111 * seems to contain the requested dBm level, and the CLI on Cisco 2112 * APs clearly state the range is -127 to 127 dBm, which indicates 2113 * a signed byte, although it seemingly never actually goes negative. 2114 * The other byte seems to always be zero. 2115 */ 2116 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2117 } 2118 2119 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2120 struct ieee80211_channel *channel, 2121 struct ieee80211_mgmt *mgmt, 2122 const u8 *country_ie, u8 country_ie_len, 2123 const u8 *pwr_constr_ie, 2124 const u8 *cisco_dtpc_ie) 2125 { 2126 struct ieee80211_sub_if_data *sdata = link->sdata; 2127 bool has_80211h_pwr = false, has_cisco_pwr = false; 2128 int chan_pwr = 0, pwr_reduction_80211h = 0; 2129 int pwr_level_cisco, pwr_level_80211h; 2130 int new_ap_level; 2131 __le16 capab = mgmt->u.probe_resp.capab_info; 2132 2133 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2134 return 0; /* TODO */ 2135 2136 if (country_ie && 2137 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2138 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2139 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2140 sdata, channel, country_ie, country_ie_len, 2141 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2142 pwr_level_80211h = 2143 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2144 } 2145 2146 if (cisco_dtpc_ie) { 2147 ieee80211_find_cisco_dtpc( 2148 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2149 has_cisco_pwr = true; 2150 } 2151 2152 if (!has_80211h_pwr && !has_cisco_pwr) 2153 return 0; 2154 2155 /* If we have both 802.11h and Cisco DTPC, apply both limits 2156 * by picking the smallest of the two power levels advertised. 2157 */ 2158 if (has_80211h_pwr && 2159 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2160 new_ap_level = pwr_level_80211h; 2161 2162 if (link->ap_power_level == new_ap_level) 2163 return 0; 2164 2165 sdata_dbg(sdata, 2166 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2167 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2168 link->u.mgd.bssid); 2169 } else { /* has_cisco_pwr is always true here. */ 2170 new_ap_level = pwr_level_cisco; 2171 2172 if (link->ap_power_level == new_ap_level) 2173 return 0; 2174 2175 sdata_dbg(sdata, 2176 "Limiting TX power to %d dBm as advertised by %pM\n", 2177 pwr_level_cisco, link->u.mgd.bssid); 2178 } 2179 2180 link->ap_power_level = new_ap_level; 2181 if (__ieee80211_recalc_txpower(sdata)) 2182 return BSS_CHANGED_TXPOWER; 2183 return 0; 2184 } 2185 2186 /* powersave */ 2187 static void ieee80211_enable_ps(struct ieee80211_local *local, 2188 struct ieee80211_sub_if_data *sdata) 2189 { 2190 struct ieee80211_conf *conf = &local->hw.conf; 2191 2192 /* 2193 * If we are scanning right now then the parameters will 2194 * take effect when scan finishes. 2195 */ 2196 if (local->scanning) 2197 return; 2198 2199 if (conf->dynamic_ps_timeout > 0 && 2200 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2201 mod_timer(&local->dynamic_ps_timer, jiffies + 2202 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2203 } else { 2204 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2205 ieee80211_send_nullfunc(local, sdata, true); 2206 2207 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2208 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2209 return; 2210 2211 conf->flags |= IEEE80211_CONF_PS; 2212 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2213 } 2214 } 2215 2216 static void ieee80211_change_ps(struct ieee80211_local *local) 2217 { 2218 struct ieee80211_conf *conf = &local->hw.conf; 2219 2220 if (local->ps_sdata) { 2221 ieee80211_enable_ps(local, local->ps_sdata); 2222 } else if (conf->flags & IEEE80211_CONF_PS) { 2223 conf->flags &= ~IEEE80211_CONF_PS; 2224 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2225 del_timer_sync(&local->dynamic_ps_timer); 2226 cancel_work_sync(&local->dynamic_ps_enable_work); 2227 } 2228 } 2229 2230 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2231 { 2232 struct ieee80211_local *local = sdata->local; 2233 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2234 struct sta_info *sta = NULL; 2235 bool authorized = false; 2236 2237 if (!mgd->powersave) 2238 return false; 2239 2240 if (mgd->broken_ap) 2241 return false; 2242 2243 if (!mgd->associated) 2244 return false; 2245 2246 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2247 return false; 2248 2249 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2250 !sdata->deflink.u.mgd.have_beacon) 2251 return false; 2252 2253 rcu_read_lock(); 2254 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2255 if (sta) 2256 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2257 rcu_read_unlock(); 2258 2259 return authorized; 2260 } 2261 2262 /* need to hold RTNL or interface lock */ 2263 void ieee80211_recalc_ps(struct ieee80211_local *local) 2264 { 2265 struct ieee80211_sub_if_data *sdata, *found = NULL; 2266 int count = 0; 2267 int timeout; 2268 2269 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2270 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2271 local->ps_sdata = NULL; 2272 return; 2273 } 2274 2275 list_for_each_entry(sdata, &local->interfaces, list) { 2276 if (!ieee80211_sdata_running(sdata)) 2277 continue; 2278 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2279 /* If an AP vif is found, then disable PS 2280 * by setting the count to zero thereby setting 2281 * ps_sdata to NULL. 2282 */ 2283 count = 0; 2284 break; 2285 } 2286 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2287 continue; 2288 found = sdata; 2289 count++; 2290 } 2291 2292 if (count == 1 && ieee80211_powersave_allowed(found)) { 2293 u8 dtimper = found->deflink.u.mgd.dtim_period; 2294 2295 timeout = local->dynamic_ps_forced_timeout; 2296 if (timeout < 0) 2297 timeout = 100; 2298 local->hw.conf.dynamic_ps_timeout = timeout; 2299 2300 /* If the TIM IE is invalid, pretend the value is 1 */ 2301 if (!dtimper) 2302 dtimper = 1; 2303 2304 local->hw.conf.ps_dtim_period = dtimper; 2305 local->ps_sdata = found; 2306 } else { 2307 local->ps_sdata = NULL; 2308 } 2309 2310 ieee80211_change_ps(local); 2311 } 2312 2313 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2314 { 2315 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2316 2317 if (sdata->vif.cfg.ps != ps_allowed) { 2318 sdata->vif.cfg.ps = ps_allowed; 2319 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2320 } 2321 } 2322 2323 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2324 { 2325 struct ieee80211_local *local = 2326 container_of(work, struct ieee80211_local, 2327 dynamic_ps_disable_work); 2328 2329 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2330 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2331 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2332 } 2333 2334 ieee80211_wake_queues_by_reason(&local->hw, 2335 IEEE80211_MAX_QUEUE_MAP, 2336 IEEE80211_QUEUE_STOP_REASON_PS, 2337 false); 2338 } 2339 2340 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2341 { 2342 struct ieee80211_local *local = 2343 container_of(work, struct ieee80211_local, 2344 dynamic_ps_enable_work); 2345 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2346 struct ieee80211_if_managed *ifmgd; 2347 unsigned long flags; 2348 int q; 2349 2350 /* can only happen when PS was just disabled anyway */ 2351 if (!sdata) 2352 return; 2353 2354 ifmgd = &sdata->u.mgd; 2355 2356 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2357 return; 2358 2359 if (local->hw.conf.dynamic_ps_timeout > 0) { 2360 /* don't enter PS if TX frames are pending */ 2361 if (drv_tx_frames_pending(local)) { 2362 mod_timer(&local->dynamic_ps_timer, jiffies + 2363 msecs_to_jiffies( 2364 local->hw.conf.dynamic_ps_timeout)); 2365 return; 2366 } 2367 2368 /* 2369 * transmission can be stopped by others which leads to 2370 * dynamic_ps_timer expiry. Postpone the ps timer if it 2371 * is not the actual idle state. 2372 */ 2373 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2374 for (q = 0; q < local->hw.queues; q++) { 2375 if (local->queue_stop_reasons[q]) { 2376 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2377 flags); 2378 mod_timer(&local->dynamic_ps_timer, jiffies + 2379 msecs_to_jiffies( 2380 local->hw.conf.dynamic_ps_timeout)); 2381 return; 2382 } 2383 } 2384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2385 } 2386 2387 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2388 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2389 if (drv_tx_frames_pending(local)) { 2390 mod_timer(&local->dynamic_ps_timer, jiffies + 2391 msecs_to_jiffies( 2392 local->hw.conf.dynamic_ps_timeout)); 2393 } else { 2394 ieee80211_send_nullfunc(local, sdata, true); 2395 /* Flush to get the tx status of nullfunc frame */ 2396 ieee80211_flush_queues(local, sdata, false); 2397 } 2398 } 2399 2400 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2401 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2402 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2403 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2404 local->hw.conf.flags |= IEEE80211_CONF_PS; 2405 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2406 } 2407 } 2408 2409 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2410 { 2411 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2412 2413 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2414 } 2415 2416 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2417 { 2418 struct delayed_work *delayed_work = to_delayed_work(work); 2419 struct ieee80211_link_data *link = 2420 container_of(delayed_work, struct ieee80211_link_data, 2421 dfs_cac_timer_work); 2422 struct cfg80211_chan_def chandef = link->conf->chandef; 2423 struct ieee80211_sub_if_data *sdata = link->sdata; 2424 2425 mutex_lock(&sdata->local->mtx); 2426 if (sdata->wdev.cac_started) { 2427 ieee80211_link_release_channel(link); 2428 cfg80211_cac_event(sdata->dev, &chandef, 2429 NL80211_RADAR_CAC_FINISHED, 2430 GFP_KERNEL); 2431 } 2432 mutex_unlock(&sdata->local->mtx); 2433 } 2434 2435 static bool 2436 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2437 { 2438 struct ieee80211_local *local = sdata->local; 2439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2440 bool ret = false; 2441 int ac; 2442 2443 if (local->hw.queues < IEEE80211_NUM_ACS) 2444 return false; 2445 2446 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2447 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2448 int non_acm_ac; 2449 unsigned long now = jiffies; 2450 2451 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2452 tx_tspec->admitted_time && 2453 time_after(now, tx_tspec->time_slice_start + HZ)) { 2454 tx_tspec->consumed_tx_time = 0; 2455 tx_tspec->time_slice_start = now; 2456 2457 if (tx_tspec->downgraded) 2458 tx_tspec->action = 2459 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2460 } 2461 2462 switch (tx_tspec->action) { 2463 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2464 /* take the original parameters */ 2465 if (drv_conf_tx(local, &sdata->deflink, ac, 2466 &sdata->deflink.tx_conf[ac])) 2467 link_err(&sdata->deflink, 2468 "failed to set TX queue parameters for queue %d\n", 2469 ac); 2470 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2471 tx_tspec->downgraded = false; 2472 ret = true; 2473 break; 2474 case TX_TSPEC_ACTION_DOWNGRADE: 2475 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2476 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2477 ret = true; 2478 break; 2479 } 2480 /* downgrade next lower non-ACM AC */ 2481 for (non_acm_ac = ac + 1; 2482 non_acm_ac < IEEE80211_NUM_ACS; 2483 non_acm_ac++) 2484 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2485 break; 2486 /* Usually the loop will result in using BK even if it 2487 * requires admission control, but such a configuration 2488 * makes no sense and we have to transmit somehow - the 2489 * AC selection does the same thing. 2490 * If we started out trying to downgrade from BK, then 2491 * the extra condition here might be needed. 2492 */ 2493 if (non_acm_ac >= IEEE80211_NUM_ACS) 2494 non_acm_ac = IEEE80211_AC_BK; 2495 if (drv_conf_tx(local, &sdata->deflink, ac, 2496 &sdata->deflink.tx_conf[non_acm_ac])) 2497 link_err(&sdata->deflink, 2498 "failed to set TX queue parameters for queue %d\n", 2499 ac); 2500 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2501 ret = true; 2502 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2503 tx_tspec->time_slice_start + HZ - now + 1); 2504 break; 2505 case TX_TSPEC_ACTION_NONE: 2506 /* nothing now */ 2507 break; 2508 } 2509 } 2510 2511 return ret; 2512 } 2513 2514 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2515 { 2516 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2517 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2518 BSS_CHANGED_QOS); 2519 } 2520 2521 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2522 { 2523 struct ieee80211_sub_if_data *sdata; 2524 2525 sdata = container_of(work, struct ieee80211_sub_if_data, 2526 u.mgd.tx_tspec_wk.work); 2527 ieee80211_sta_handle_tspec_ac_params(sdata); 2528 } 2529 2530 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2531 { 2532 struct ieee80211_sub_if_data *sdata = link->sdata; 2533 struct ieee80211_local *local = sdata->local; 2534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2535 struct ieee80211_tx_queue_params *params = link->tx_conf; 2536 u8 ac; 2537 2538 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2539 mlme_dbg(sdata, 2540 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2541 ac, params[ac].acm, 2542 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2543 params[ac].txop, params[ac].uapsd, 2544 ifmgd->tx_tspec[ac].downgraded); 2545 if (!ifmgd->tx_tspec[ac].downgraded && 2546 drv_conf_tx(local, link, ac, ¶ms[ac])) 2547 link_err(link, 2548 "failed to set TX queue parameters for AC %d\n", 2549 ac); 2550 } 2551 } 2552 2553 /* MLME */ 2554 static bool 2555 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2556 struct ieee80211_link_data *link, 2557 const u8 *wmm_param, size_t wmm_param_len, 2558 const struct ieee80211_mu_edca_param_set *mu_edca) 2559 { 2560 struct ieee80211_sub_if_data *sdata = link->sdata; 2561 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2563 size_t left; 2564 int count, mu_edca_count, ac; 2565 const u8 *pos; 2566 u8 uapsd_queues = 0; 2567 2568 if (!local->ops->conf_tx) 2569 return false; 2570 2571 if (local->hw.queues < IEEE80211_NUM_ACS) 2572 return false; 2573 2574 if (!wmm_param) 2575 return false; 2576 2577 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2578 return false; 2579 2580 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2581 uapsd_queues = ifmgd->uapsd_queues; 2582 2583 count = wmm_param[6] & 0x0f; 2584 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2585 * if mu_edca was preset before and now it disappeared tell 2586 * the driver about it. 2587 */ 2588 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2589 if (count == link->u.mgd.wmm_last_param_set && 2590 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2591 return false; 2592 link->u.mgd.wmm_last_param_set = count; 2593 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2594 2595 pos = wmm_param + 8; 2596 left = wmm_param_len - 8; 2597 2598 memset(¶ms, 0, sizeof(params)); 2599 2600 sdata->wmm_acm = 0; 2601 for (; left >= 4; left -= 4, pos += 4) { 2602 int aci = (pos[0] >> 5) & 0x03; 2603 int acm = (pos[0] >> 4) & 0x01; 2604 bool uapsd = false; 2605 2606 switch (aci) { 2607 case 1: /* AC_BK */ 2608 ac = IEEE80211_AC_BK; 2609 if (acm) 2610 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2611 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2612 uapsd = true; 2613 params[ac].mu_edca = !!mu_edca; 2614 if (mu_edca) 2615 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2616 break; 2617 case 2: /* AC_VI */ 2618 ac = IEEE80211_AC_VI; 2619 if (acm) 2620 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2621 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2622 uapsd = true; 2623 params[ac].mu_edca = !!mu_edca; 2624 if (mu_edca) 2625 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2626 break; 2627 case 3: /* AC_VO */ 2628 ac = IEEE80211_AC_VO; 2629 if (acm) 2630 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2631 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2632 uapsd = true; 2633 params[ac].mu_edca = !!mu_edca; 2634 if (mu_edca) 2635 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2636 break; 2637 case 0: /* AC_BE */ 2638 default: 2639 ac = IEEE80211_AC_BE; 2640 if (acm) 2641 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2642 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2643 uapsd = true; 2644 params[ac].mu_edca = !!mu_edca; 2645 if (mu_edca) 2646 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2647 break; 2648 } 2649 2650 params[ac].aifs = pos[0] & 0x0f; 2651 2652 if (params[ac].aifs < 2) { 2653 sdata_info(sdata, 2654 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2655 params[ac].aifs, aci); 2656 params[ac].aifs = 2; 2657 } 2658 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2659 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2660 params[ac].txop = get_unaligned_le16(pos + 2); 2661 params[ac].acm = acm; 2662 params[ac].uapsd = uapsd; 2663 2664 if (params[ac].cw_min == 0 || 2665 params[ac].cw_min > params[ac].cw_max) { 2666 sdata_info(sdata, 2667 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2668 params[ac].cw_min, params[ac].cw_max, aci); 2669 return false; 2670 } 2671 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2672 } 2673 2674 /* WMM specification requires all 4 ACIs. */ 2675 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2676 if (params[ac].cw_min == 0) { 2677 sdata_info(sdata, 2678 "AP has invalid WMM params (missing AC %d), using defaults\n", 2679 ac); 2680 return false; 2681 } 2682 } 2683 2684 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2685 link->tx_conf[ac] = params[ac]; 2686 2687 ieee80211_mgd_set_link_qos_params(link); 2688 2689 /* enable WMM or activate new settings */ 2690 link->conf->qos = true; 2691 return true; 2692 } 2693 2694 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2695 { 2696 lockdep_assert_held(&sdata->local->mtx); 2697 2698 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2699 ieee80211_run_deferred_scan(sdata->local); 2700 } 2701 2702 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2703 { 2704 mutex_lock(&sdata->local->mtx); 2705 __ieee80211_stop_poll(sdata); 2706 mutex_unlock(&sdata->local->mtx); 2707 } 2708 2709 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2710 u16 capab, bool erp_valid, u8 erp) 2711 { 2712 struct ieee80211_bss_conf *bss_conf = link->conf; 2713 struct ieee80211_supported_band *sband; 2714 u32 changed = 0; 2715 bool use_protection; 2716 bool use_short_preamble; 2717 bool use_short_slot; 2718 2719 sband = ieee80211_get_link_sband(link); 2720 if (!sband) 2721 return changed; 2722 2723 if (erp_valid) { 2724 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2725 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2726 } else { 2727 use_protection = false; 2728 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2729 } 2730 2731 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2732 if (sband->band == NL80211_BAND_5GHZ || 2733 sband->band == NL80211_BAND_6GHZ) 2734 use_short_slot = true; 2735 2736 if (use_protection != bss_conf->use_cts_prot) { 2737 bss_conf->use_cts_prot = use_protection; 2738 changed |= BSS_CHANGED_ERP_CTS_PROT; 2739 } 2740 2741 if (use_short_preamble != bss_conf->use_short_preamble) { 2742 bss_conf->use_short_preamble = use_short_preamble; 2743 changed |= BSS_CHANGED_ERP_PREAMBLE; 2744 } 2745 2746 if (use_short_slot != bss_conf->use_short_slot) { 2747 bss_conf->use_short_slot = use_short_slot; 2748 changed |= BSS_CHANGED_ERP_SLOT; 2749 } 2750 2751 return changed; 2752 } 2753 2754 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2755 struct cfg80211_bss *cbss) 2756 { 2757 struct ieee80211_sub_if_data *sdata = link->sdata; 2758 struct ieee80211_bss_conf *bss_conf = link->conf; 2759 struct ieee80211_bss *bss = (void *)cbss->priv; 2760 u32 changed = BSS_CHANGED_QOS; 2761 2762 /* not really used in MLO */ 2763 sdata->u.mgd.beacon_timeout = 2764 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2765 bss_conf->beacon_int)); 2766 2767 changed |= ieee80211_handle_bss_capability(link, 2768 bss_conf->assoc_capability, 2769 bss->has_erp_value, 2770 bss->erp_value); 2771 2772 ieee80211_check_rate_mask(link); 2773 2774 link->u.mgd.bss = cbss; 2775 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2776 2777 if (sdata->vif.p2p || 2778 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2779 const struct cfg80211_bss_ies *ies; 2780 2781 rcu_read_lock(); 2782 ies = rcu_dereference(cbss->ies); 2783 if (ies) { 2784 int ret; 2785 2786 ret = cfg80211_get_p2p_attr( 2787 ies->data, ies->len, 2788 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2789 (u8 *) &bss_conf->p2p_noa_attr, 2790 sizeof(bss_conf->p2p_noa_attr)); 2791 if (ret >= 2) { 2792 link->u.mgd.p2p_noa_index = 2793 bss_conf->p2p_noa_attr.index; 2794 changed |= BSS_CHANGED_P2P_PS; 2795 } 2796 } 2797 rcu_read_unlock(); 2798 } 2799 2800 if (link->u.mgd.have_beacon) { 2801 bss_conf->beacon_rate = bss->beacon_rate; 2802 changed |= BSS_CHANGED_BEACON_INFO; 2803 } else { 2804 bss_conf->beacon_rate = NULL; 2805 } 2806 2807 /* Tell the driver to monitor connection quality (if supported) */ 2808 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2809 bss_conf->cqm_rssi_thold) 2810 changed |= BSS_CHANGED_CQM; 2811 2812 return changed; 2813 } 2814 2815 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2816 struct ieee80211_mgd_assoc_data *assoc_data, 2817 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2818 { 2819 struct ieee80211_local *local = sdata->local; 2820 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2821 u64 vif_changed = BSS_CHANGED_ASSOC; 2822 unsigned int link_id; 2823 2824 sdata->u.mgd.associated = true; 2825 2826 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2827 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2828 struct ieee80211_link_data *link; 2829 2830 if (!cbss || 2831 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2832 continue; 2833 2834 link = sdata_dereference(sdata->link[link_id], sdata); 2835 if (WARN_ON(!link)) 2836 return; 2837 2838 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2839 } 2840 2841 /* just to be sure */ 2842 ieee80211_stop_poll(sdata); 2843 2844 ieee80211_led_assoc(local, 1); 2845 2846 vif_cfg->assoc = 1; 2847 2848 /* Enable ARP filtering */ 2849 if (vif_cfg->arp_addr_cnt) 2850 vif_changed |= BSS_CHANGED_ARP_FILTER; 2851 2852 if (sdata->vif.valid_links) { 2853 for (link_id = 0; 2854 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2855 link_id++) { 2856 struct ieee80211_link_data *link; 2857 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2858 2859 if (!cbss || 2860 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2861 continue; 2862 2863 link = sdata_dereference(sdata->link[link_id], sdata); 2864 if (WARN_ON(!link)) 2865 return; 2866 2867 ieee80211_link_info_change_notify(sdata, link, 2868 changed[link_id]); 2869 2870 ieee80211_recalc_smps(sdata, link); 2871 } 2872 2873 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2874 } else { 2875 ieee80211_bss_info_change_notify(sdata, 2876 vif_changed | changed[0]); 2877 } 2878 2879 mutex_lock(&local->iflist_mtx); 2880 ieee80211_recalc_ps(local); 2881 mutex_unlock(&local->iflist_mtx); 2882 2883 /* leave this here to not change ordering in non-MLO cases */ 2884 if (!sdata->vif.valid_links) 2885 ieee80211_recalc_smps(sdata, &sdata->deflink); 2886 ieee80211_recalc_ps_vif(sdata); 2887 2888 netif_carrier_on(sdata->dev); 2889 } 2890 2891 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2892 u16 stype, u16 reason, bool tx, 2893 u8 *frame_buf) 2894 { 2895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2896 struct ieee80211_local *local = sdata->local; 2897 unsigned int link_id; 2898 u32 changed = 0; 2899 struct ieee80211_prep_tx_info info = { 2900 .subtype = stype, 2901 }; 2902 2903 sdata_assert_lock(sdata); 2904 2905 if (WARN_ON_ONCE(tx && !frame_buf)) 2906 return; 2907 2908 if (WARN_ON(!ifmgd->associated)) 2909 return; 2910 2911 ieee80211_stop_poll(sdata); 2912 2913 ifmgd->associated = false; 2914 2915 /* other links will be destroyed */ 2916 sdata->deflink.u.mgd.bss = NULL; 2917 2918 netif_carrier_off(sdata->dev); 2919 2920 /* 2921 * if we want to get out of ps before disassoc (why?) we have 2922 * to do it before sending disassoc, as otherwise the null-packet 2923 * won't be valid. 2924 */ 2925 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2926 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2927 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2928 } 2929 local->ps_sdata = NULL; 2930 2931 /* disable per-vif ps */ 2932 ieee80211_recalc_ps_vif(sdata); 2933 2934 /* make sure ongoing transmission finishes */ 2935 synchronize_net(); 2936 2937 /* 2938 * drop any frame before deauth/disassoc, this can be data or 2939 * management frame. Since we are disconnecting, we should not 2940 * insist sending these frames which can take time and delay 2941 * the disconnection and possible the roaming. 2942 */ 2943 if (tx) 2944 ieee80211_flush_queues(local, sdata, true); 2945 2946 /* deauthenticate/disassociate now */ 2947 if (tx || frame_buf) { 2948 /* 2949 * In multi channel scenarios guarantee that the virtual 2950 * interface is granted immediate airtime to transmit the 2951 * deauthentication frame by calling mgd_prepare_tx, if the 2952 * driver requested so. 2953 */ 2954 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2955 !sdata->deflink.u.mgd.have_beacon) { 2956 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2957 } 2958 2959 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2960 sdata->vif.cfg.ap_addr, stype, 2961 reason, tx, frame_buf); 2962 } 2963 2964 /* flush out frame - make sure the deauth was actually sent */ 2965 if (tx) 2966 ieee80211_flush_queues(local, sdata, false); 2967 2968 drv_mgd_complete_tx(sdata->local, sdata, &info); 2969 2970 /* clear AP addr only after building the needed mgmt frames */ 2971 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2972 eth_zero_addr(sdata->vif.cfg.ap_addr); 2973 2974 sdata->vif.cfg.ssid_len = 0; 2975 2976 /* remove AP and TDLS peers */ 2977 sta_info_flush(sdata); 2978 2979 /* finally reset all BSS / config parameters */ 2980 if (!sdata->vif.valid_links) 2981 changed |= ieee80211_reset_erp_info(sdata); 2982 2983 ieee80211_led_assoc(local, 0); 2984 changed |= BSS_CHANGED_ASSOC; 2985 sdata->vif.cfg.assoc = false; 2986 2987 sdata->deflink.u.mgd.p2p_noa_index = -1; 2988 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2989 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2990 2991 /* on the next assoc, re-program HT/VHT parameters */ 2992 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2993 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2994 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2995 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2996 2997 /* 2998 * reset MU-MIMO ownership and group data in default link, 2999 * if used, other links are destroyed 3000 */ 3001 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3002 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3003 memset(sdata->vif.bss_conf.mu_group.position, 0, 3004 sizeof(sdata->vif.bss_conf.mu_group.position)); 3005 if (!sdata->vif.valid_links) 3006 changed |= BSS_CHANGED_MU_GROUPS; 3007 sdata->vif.bss_conf.mu_mimo_owner = false; 3008 3009 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3010 3011 del_timer_sync(&local->dynamic_ps_timer); 3012 cancel_work_sync(&local->dynamic_ps_enable_work); 3013 3014 /* Disable ARP filtering */ 3015 if (sdata->vif.cfg.arp_addr_cnt) 3016 changed |= BSS_CHANGED_ARP_FILTER; 3017 3018 sdata->vif.bss_conf.qos = false; 3019 if (!sdata->vif.valid_links) { 3020 changed |= BSS_CHANGED_QOS; 3021 /* The BSSID (not really interesting) and HT changed */ 3022 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3023 ieee80211_bss_info_change_notify(sdata, changed); 3024 } else { 3025 ieee80211_vif_cfg_change_notify(sdata, changed); 3026 } 3027 3028 /* disassociated - set to defaults now */ 3029 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3030 3031 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3032 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3033 del_timer_sync(&sdata->u.mgd.timer); 3034 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 3035 3036 sdata->vif.bss_conf.dtim_period = 0; 3037 sdata->vif.bss_conf.beacon_rate = NULL; 3038 3039 sdata->deflink.u.mgd.have_beacon = false; 3040 sdata->deflink.u.mgd.tracking_signal_avg = false; 3041 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3042 3043 ifmgd->flags = 0; 3044 sdata->deflink.u.mgd.conn_flags = 0; 3045 mutex_lock(&local->mtx); 3046 3047 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3048 struct ieee80211_link_data *link; 3049 3050 link = sdata_dereference(sdata->link[link_id], sdata); 3051 if (!link) 3052 continue; 3053 ieee80211_link_release_channel(link); 3054 } 3055 3056 sdata->vif.bss_conf.csa_active = false; 3057 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3058 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3059 if (sdata->deflink.csa_block_tx) { 3060 ieee80211_wake_vif_queues(local, sdata, 3061 IEEE80211_QUEUE_STOP_REASON_CSA); 3062 sdata->deflink.csa_block_tx = false; 3063 } 3064 mutex_unlock(&local->mtx); 3065 3066 /* existing TX TSPEC sessions no longer exist */ 3067 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3068 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3069 3070 sdata->vif.bss_conf.pwr_reduction = 0; 3071 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3072 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3073 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3074 3075 ieee80211_vif_set_links(sdata, 0); 3076 } 3077 3078 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3079 { 3080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3081 struct ieee80211_local *local = sdata->local; 3082 3083 mutex_lock(&local->mtx); 3084 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3085 goto out; 3086 3087 __ieee80211_stop_poll(sdata); 3088 3089 mutex_lock(&local->iflist_mtx); 3090 ieee80211_recalc_ps(local); 3091 mutex_unlock(&local->iflist_mtx); 3092 3093 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3094 goto out; 3095 3096 /* 3097 * We've received a probe response, but are not sure whether 3098 * we have or will be receiving any beacons or data, so let's 3099 * schedule the timers again, just in case. 3100 */ 3101 ieee80211_sta_reset_beacon_monitor(sdata); 3102 3103 mod_timer(&ifmgd->conn_mon_timer, 3104 round_jiffies_up(jiffies + 3105 IEEE80211_CONNECTION_IDLE_TIME)); 3106 out: 3107 mutex_unlock(&local->mtx); 3108 } 3109 3110 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3111 struct ieee80211_hdr *hdr, 3112 u16 tx_time) 3113 { 3114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3115 u16 tid; 3116 int ac; 3117 struct ieee80211_sta_tx_tspec *tx_tspec; 3118 unsigned long now = jiffies; 3119 3120 if (!ieee80211_is_data_qos(hdr->frame_control)) 3121 return; 3122 3123 tid = ieee80211_get_tid(hdr); 3124 ac = ieee80211_ac_from_tid(tid); 3125 tx_tspec = &ifmgd->tx_tspec[ac]; 3126 3127 if (likely(!tx_tspec->admitted_time)) 3128 return; 3129 3130 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3131 tx_tspec->consumed_tx_time = 0; 3132 tx_tspec->time_slice_start = now; 3133 3134 if (tx_tspec->downgraded) { 3135 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3136 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3137 } 3138 } 3139 3140 if (tx_tspec->downgraded) 3141 return; 3142 3143 tx_tspec->consumed_tx_time += tx_time; 3144 3145 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3146 tx_tspec->downgraded = true; 3147 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3148 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3149 } 3150 } 3151 3152 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3153 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3154 { 3155 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3156 3157 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3158 !sdata->u.mgd.probe_send_count) 3159 return; 3160 3161 if (ack) 3162 sdata->u.mgd.probe_send_count = 0; 3163 else 3164 sdata->u.mgd.nullfunc_failed = true; 3165 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3166 } 3167 3168 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3169 const u8 *src, const u8 *dst, 3170 const u8 *ssid, size_t ssid_len, 3171 struct ieee80211_channel *channel) 3172 { 3173 struct sk_buff *skb; 3174 3175 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3176 ssid, ssid_len, NULL, 0, 3177 IEEE80211_PROBE_FLAG_DIRECTED); 3178 if (skb) 3179 ieee80211_tx_skb(sdata, skb); 3180 } 3181 3182 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3183 { 3184 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3185 u8 *dst = sdata->vif.cfg.ap_addr; 3186 u8 unicast_limit = max(1, max_probe_tries - 3); 3187 struct sta_info *sta; 3188 3189 if (WARN_ON(sdata->vif.valid_links)) 3190 return; 3191 3192 /* 3193 * Try sending broadcast probe requests for the last three 3194 * probe requests after the first ones failed since some 3195 * buggy APs only support broadcast probe requests. 3196 */ 3197 if (ifmgd->probe_send_count >= unicast_limit) 3198 dst = NULL; 3199 3200 /* 3201 * When the hardware reports an accurate Tx ACK status, it's 3202 * better to send a nullfunc frame instead of a probe request, 3203 * as it will kick us off the AP quickly if we aren't associated 3204 * anymore. The timeout will be reset if the frame is ACKed by 3205 * the AP. 3206 */ 3207 ifmgd->probe_send_count++; 3208 3209 if (dst) { 3210 mutex_lock(&sdata->local->sta_mtx); 3211 sta = sta_info_get(sdata, dst); 3212 if (!WARN_ON(!sta)) 3213 ieee80211_check_fast_rx(sta); 3214 mutex_unlock(&sdata->local->sta_mtx); 3215 } 3216 3217 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3218 ifmgd->nullfunc_failed = false; 3219 ieee80211_send_nullfunc(sdata->local, sdata, false); 3220 } else { 3221 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3222 sdata->vif.cfg.ssid, 3223 sdata->vif.cfg.ssid_len, 3224 sdata->deflink.u.mgd.bss->channel); 3225 } 3226 3227 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3228 run_again(sdata, ifmgd->probe_timeout); 3229 } 3230 3231 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3232 bool beacon) 3233 { 3234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3235 bool already = false; 3236 3237 if (WARN_ON_ONCE(sdata->vif.valid_links)) 3238 return; 3239 3240 if (!ieee80211_sdata_running(sdata)) 3241 return; 3242 3243 sdata_lock(sdata); 3244 3245 if (!ifmgd->associated) 3246 goto out; 3247 3248 mutex_lock(&sdata->local->mtx); 3249 3250 if (sdata->local->tmp_channel || sdata->local->scanning) { 3251 mutex_unlock(&sdata->local->mtx); 3252 goto out; 3253 } 3254 3255 if (sdata->local->suspending) { 3256 /* reschedule after resume */ 3257 mutex_unlock(&sdata->local->mtx); 3258 ieee80211_reset_ap_probe(sdata); 3259 goto out; 3260 } 3261 3262 if (beacon) { 3263 mlme_dbg_ratelimited(sdata, 3264 "detected beacon loss from AP (missed %d beacons) - probing\n", 3265 beacon_loss_count); 3266 3267 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3268 } 3269 3270 /* 3271 * The driver/our work has already reported this event or the 3272 * connection monitoring has kicked in and we have already sent 3273 * a probe request. Or maybe the AP died and the driver keeps 3274 * reporting until we disassociate... 3275 * 3276 * In either case we have to ignore the current call to this 3277 * function (except for setting the correct probe reason bit) 3278 * because otherwise we would reset the timer every time and 3279 * never check whether we received a probe response! 3280 */ 3281 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3282 already = true; 3283 3284 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3285 3286 mutex_unlock(&sdata->local->mtx); 3287 3288 if (already) 3289 goto out; 3290 3291 mutex_lock(&sdata->local->iflist_mtx); 3292 ieee80211_recalc_ps(sdata->local); 3293 mutex_unlock(&sdata->local->iflist_mtx); 3294 3295 ifmgd->probe_send_count = 0; 3296 ieee80211_mgd_probe_ap_send(sdata); 3297 out: 3298 sdata_unlock(sdata); 3299 } 3300 3301 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3302 struct ieee80211_vif *vif) 3303 { 3304 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3306 struct cfg80211_bss *cbss; 3307 struct sk_buff *skb; 3308 const struct element *ssid; 3309 int ssid_len; 3310 3311 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3312 sdata->vif.valid_links)) 3313 return NULL; 3314 3315 sdata_assert_lock(sdata); 3316 3317 if (ifmgd->associated) 3318 cbss = sdata->deflink.u.mgd.bss; 3319 else if (ifmgd->auth_data) 3320 cbss = ifmgd->auth_data->bss; 3321 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3322 cbss = ifmgd->assoc_data->link[0].bss; 3323 else 3324 return NULL; 3325 3326 rcu_read_lock(); 3327 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3328 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3329 "invalid SSID element (len=%d)", 3330 ssid ? ssid->datalen : -1)) 3331 ssid_len = 0; 3332 else 3333 ssid_len = ssid->datalen; 3334 3335 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3336 (u32) -1, cbss->channel, 3337 ssid->data, ssid_len, 3338 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3339 rcu_read_unlock(); 3340 3341 return skb; 3342 } 3343 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3344 3345 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3346 const u8 *buf, size_t len, bool tx, 3347 u16 reason, bool reconnect) 3348 { 3349 struct ieee80211_event event = { 3350 .type = MLME_EVENT, 3351 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3352 .u.mlme.reason = reason, 3353 }; 3354 3355 if (tx) 3356 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3357 else 3358 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3359 3360 drv_event_callback(sdata->local, sdata, &event); 3361 } 3362 3363 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3364 { 3365 struct ieee80211_local *local = sdata->local; 3366 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3367 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3368 bool tx; 3369 3370 sdata_lock(sdata); 3371 if (!ifmgd->associated) { 3372 sdata_unlock(sdata); 3373 return; 3374 } 3375 3376 /* in MLO assume we have a link where we can TX the frame */ 3377 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3378 3379 if (!ifmgd->driver_disconnect) { 3380 unsigned int link_id; 3381 3382 /* 3383 * AP is probably out of range (or not reachable for another 3384 * reason) so remove the bss structs for that AP. In the case 3385 * of multi-link, it's not clear that all of them really are 3386 * out of range, but if they weren't the driver likely would 3387 * have switched to just have a single link active? 3388 */ 3389 for (link_id = 0; 3390 link_id < ARRAY_SIZE(sdata->link); 3391 link_id++) { 3392 struct ieee80211_link_data *link; 3393 3394 link = sdata_dereference(sdata->link[link_id], sdata); 3395 if (!link) 3396 continue; 3397 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3398 link->u.mgd.bss = NULL; 3399 } 3400 } 3401 3402 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3403 ifmgd->driver_disconnect ? 3404 WLAN_REASON_DEAUTH_LEAVING : 3405 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3406 tx, frame_buf); 3407 mutex_lock(&local->mtx); 3408 /* the other links will be destroyed */ 3409 sdata->vif.bss_conf.csa_active = false; 3410 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3411 if (sdata->deflink.csa_block_tx) { 3412 ieee80211_wake_vif_queues(local, sdata, 3413 IEEE80211_QUEUE_STOP_REASON_CSA); 3414 sdata->deflink.csa_block_tx = false; 3415 } 3416 mutex_unlock(&local->mtx); 3417 3418 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3420 ifmgd->reconnect); 3421 ifmgd->reconnect = false; 3422 3423 sdata_unlock(sdata); 3424 } 3425 3426 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3427 { 3428 struct ieee80211_sub_if_data *sdata = 3429 container_of(work, struct ieee80211_sub_if_data, 3430 u.mgd.beacon_connection_loss_work); 3431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3432 3433 if (ifmgd->connection_loss) { 3434 sdata_info(sdata, "Connection to AP %pM lost\n", 3435 sdata->vif.cfg.ap_addr); 3436 __ieee80211_disconnect(sdata); 3437 ifmgd->connection_loss = false; 3438 } else if (ifmgd->driver_disconnect) { 3439 sdata_info(sdata, 3440 "Driver requested disconnection from AP %pM\n", 3441 sdata->vif.cfg.ap_addr); 3442 __ieee80211_disconnect(sdata); 3443 ifmgd->driver_disconnect = false; 3444 } else { 3445 if (ifmgd->associated) 3446 sdata->deflink.u.mgd.beacon_loss_count++; 3447 ieee80211_mgd_probe_ap(sdata, true); 3448 } 3449 } 3450 3451 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3452 { 3453 struct ieee80211_sub_if_data *sdata = 3454 container_of(work, struct ieee80211_sub_if_data, 3455 u.mgd.csa_connection_drop_work); 3456 3457 __ieee80211_disconnect(sdata); 3458 } 3459 3460 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3461 { 3462 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3463 struct ieee80211_hw *hw = &sdata->local->hw; 3464 3465 trace_api_beacon_loss(sdata); 3466 3467 sdata->u.mgd.connection_loss = false; 3468 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3469 } 3470 EXPORT_SYMBOL(ieee80211_beacon_loss); 3471 3472 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3473 { 3474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3475 struct ieee80211_hw *hw = &sdata->local->hw; 3476 3477 trace_api_connection_loss(sdata); 3478 3479 sdata->u.mgd.connection_loss = true; 3480 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3481 } 3482 EXPORT_SYMBOL(ieee80211_connection_loss); 3483 3484 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3485 { 3486 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3487 struct ieee80211_hw *hw = &sdata->local->hw; 3488 3489 trace_api_disconnect(sdata, reconnect); 3490 3491 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3492 return; 3493 3494 sdata->u.mgd.driver_disconnect = true; 3495 sdata->u.mgd.reconnect = reconnect; 3496 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3497 } 3498 EXPORT_SYMBOL(ieee80211_disconnect); 3499 3500 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3501 bool assoc) 3502 { 3503 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3504 3505 sdata_assert_lock(sdata); 3506 3507 if (!assoc) { 3508 /* 3509 * we are not authenticated yet, the only timer that could be 3510 * running is the timeout for the authentication response which 3511 * which is not relevant anymore. 3512 */ 3513 del_timer_sync(&sdata->u.mgd.timer); 3514 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3515 3516 /* other links are destroyed */ 3517 sdata->deflink.u.mgd.conn_flags = 0; 3518 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3519 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3520 BSS_CHANGED_BSSID); 3521 sdata->u.mgd.flags = 0; 3522 3523 mutex_lock(&sdata->local->mtx); 3524 ieee80211_link_release_channel(&sdata->deflink); 3525 ieee80211_vif_set_links(sdata, 0); 3526 mutex_unlock(&sdata->local->mtx); 3527 } 3528 3529 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3530 kfree(auth_data); 3531 sdata->u.mgd.auth_data = NULL; 3532 } 3533 3534 enum assoc_status { 3535 ASSOC_SUCCESS, 3536 ASSOC_REJECTED, 3537 ASSOC_TIMEOUT, 3538 ASSOC_ABANDON, 3539 }; 3540 3541 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3542 enum assoc_status status) 3543 { 3544 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3545 3546 sdata_assert_lock(sdata); 3547 3548 if (status != ASSOC_SUCCESS) { 3549 /* 3550 * we are not associated yet, the only timer that could be 3551 * running is the timeout for the association response which 3552 * which is not relevant anymore. 3553 */ 3554 del_timer_sync(&sdata->u.mgd.timer); 3555 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3556 3557 sdata->deflink.u.mgd.conn_flags = 0; 3558 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3559 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3560 BSS_CHANGED_BSSID); 3561 sdata->u.mgd.flags = 0; 3562 sdata->vif.bss_conf.mu_mimo_owner = false; 3563 3564 if (status != ASSOC_REJECTED) { 3565 struct cfg80211_assoc_failure data = { 3566 .timeout = status == ASSOC_TIMEOUT, 3567 }; 3568 int i; 3569 3570 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3571 ARRAY_SIZE(assoc_data->link)); 3572 3573 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3574 data.bss[i] = assoc_data->link[i].bss; 3575 3576 if (sdata->vif.valid_links) 3577 data.ap_mld_addr = assoc_data->ap_addr; 3578 3579 cfg80211_assoc_failure(sdata->dev, &data); 3580 } 3581 3582 mutex_lock(&sdata->local->mtx); 3583 ieee80211_link_release_channel(&sdata->deflink); 3584 ieee80211_vif_set_links(sdata, 0); 3585 mutex_unlock(&sdata->local->mtx); 3586 } 3587 3588 kfree(assoc_data); 3589 sdata->u.mgd.assoc_data = NULL; 3590 } 3591 3592 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3593 struct ieee80211_mgmt *mgmt, size_t len) 3594 { 3595 struct ieee80211_local *local = sdata->local; 3596 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3597 const struct element *challenge; 3598 u8 *pos; 3599 u32 tx_flags = 0; 3600 struct ieee80211_prep_tx_info info = { 3601 .subtype = IEEE80211_STYPE_AUTH, 3602 }; 3603 3604 pos = mgmt->u.auth.variable; 3605 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3606 len - (pos - (u8 *)mgmt)); 3607 if (!challenge) 3608 return; 3609 auth_data->expected_transaction = 4; 3610 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3611 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3612 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3613 IEEE80211_TX_INTFL_MLME_CONN_TX; 3614 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3615 (void *)challenge, 3616 challenge->datalen + sizeof(*challenge), 3617 auth_data->ap_addr, auth_data->ap_addr, 3618 auth_data->key, auth_data->key_len, 3619 auth_data->key_idx, tx_flags); 3620 } 3621 3622 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3623 { 3624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3625 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3626 struct sta_info *sta; 3627 bool result = true; 3628 3629 sdata_info(sdata, "authenticated\n"); 3630 ifmgd->auth_data->done = true; 3631 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3632 ifmgd->auth_data->timeout_started = true; 3633 run_again(sdata, ifmgd->auth_data->timeout); 3634 3635 /* move station state to auth */ 3636 mutex_lock(&sdata->local->sta_mtx); 3637 sta = sta_info_get(sdata, ap_addr); 3638 if (!sta) { 3639 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3640 result = false; 3641 goto out; 3642 } 3643 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3644 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3645 result = false; 3646 goto out; 3647 } 3648 3649 out: 3650 mutex_unlock(&sdata->local->sta_mtx); 3651 return result; 3652 } 3653 3654 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3655 struct ieee80211_mgmt *mgmt, size_t len) 3656 { 3657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3658 u16 auth_alg, auth_transaction, status_code; 3659 struct ieee80211_event event = { 3660 .type = MLME_EVENT, 3661 .u.mlme.data = AUTH_EVENT, 3662 }; 3663 struct ieee80211_prep_tx_info info = { 3664 .subtype = IEEE80211_STYPE_AUTH, 3665 }; 3666 3667 sdata_assert_lock(sdata); 3668 3669 if (len < 24 + 6) 3670 return; 3671 3672 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3673 return; 3674 3675 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3676 return; 3677 3678 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3679 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3680 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3681 3682 if (auth_alg != ifmgd->auth_data->algorithm || 3683 (auth_alg != WLAN_AUTH_SAE && 3684 auth_transaction != ifmgd->auth_data->expected_transaction) || 3685 (auth_alg == WLAN_AUTH_SAE && 3686 (auth_transaction < ifmgd->auth_data->expected_transaction || 3687 auth_transaction > 2))) { 3688 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3689 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3690 auth_transaction, 3691 ifmgd->auth_data->expected_transaction); 3692 goto notify_driver; 3693 } 3694 3695 if (status_code != WLAN_STATUS_SUCCESS) { 3696 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3697 3698 if (auth_alg == WLAN_AUTH_SAE && 3699 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3700 (auth_transaction == 1 && 3701 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3702 status_code == WLAN_STATUS_SAE_PK)))) { 3703 /* waiting for userspace now */ 3704 ifmgd->auth_data->waiting = true; 3705 ifmgd->auth_data->timeout = 3706 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3707 ifmgd->auth_data->timeout_started = true; 3708 run_again(sdata, ifmgd->auth_data->timeout); 3709 goto notify_driver; 3710 } 3711 3712 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3713 mgmt->sa, status_code); 3714 ieee80211_destroy_auth_data(sdata, false); 3715 event.u.mlme.status = MLME_DENIED; 3716 event.u.mlme.reason = status_code; 3717 drv_event_callback(sdata->local, sdata, &event); 3718 goto notify_driver; 3719 } 3720 3721 switch (ifmgd->auth_data->algorithm) { 3722 case WLAN_AUTH_OPEN: 3723 case WLAN_AUTH_LEAP: 3724 case WLAN_AUTH_FT: 3725 case WLAN_AUTH_SAE: 3726 case WLAN_AUTH_FILS_SK: 3727 case WLAN_AUTH_FILS_SK_PFS: 3728 case WLAN_AUTH_FILS_PK: 3729 break; 3730 case WLAN_AUTH_SHARED_KEY: 3731 if (ifmgd->auth_data->expected_transaction != 4) { 3732 ieee80211_auth_challenge(sdata, mgmt, len); 3733 /* need another frame */ 3734 return; 3735 } 3736 break; 3737 default: 3738 WARN_ONCE(1, "invalid auth alg %d", 3739 ifmgd->auth_data->algorithm); 3740 goto notify_driver; 3741 } 3742 3743 event.u.mlme.status = MLME_SUCCESS; 3744 info.success = 1; 3745 drv_event_callback(sdata->local, sdata, &event); 3746 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3747 (auth_transaction == 2 && 3748 ifmgd->auth_data->expected_transaction == 2)) { 3749 if (!ieee80211_mark_sta_auth(sdata)) 3750 return; /* ignore frame -- wait for timeout */ 3751 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3752 auth_transaction == 2) { 3753 sdata_info(sdata, "SAE peer confirmed\n"); 3754 ifmgd->auth_data->peer_confirmed = true; 3755 } 3756 3757 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3758 notify_driver: 3759 drv_mgd_complete_tx(sdata->local, sdata, &info); 3760 } 3761 3762 #define case_WLAN(type) \ 3763 case WLAN_REASON_##type: return #type 3764 3765 const char *ieee80211_get_reason_code_string(u16 reason_code) 3766 { 3767 switch (reason_code) { 3768 case_WLAN(UNSPECIFIED); 3769 case_WLAN(PREV_AUTH_NOT_VALID); 3770 case_WLAN(DEAUTH_LEAVING); 3771 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3772 case_WLAN(DISASSOC_AP_BUSY); 3773 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3774 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3775 case_WLAN(DISASSOC_STA_HAS_LEFT); 3776 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3777 case_WLAN(DISASSOC_BAD_POWER); 3778 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3779 case_WLAN(INVALID_IE); 3780 case_WLAN(MIC_FAILURE); 3781 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3782 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3783 case_WLAN(IE_DIFFERENT); 3784 case_WLAN(INVALID_GROUP_CIPHER); 3785 case_WLAN(INVALID_PAIRWISE_CIPHER); 3786 case_WLAN(INVALID_AKMP); 3787 case_WLAN(UNSUPP_RSN_VERSION); 3788 case_WLAN(INVALID_RSN_IE_CAP); 3789 case_WLAN(IEEE8021X_FAILED); 3790 case_WLAN(CIPHER_SUITE_REJECTED); 3791 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3792 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3793 case_WLAN(DISASSOC_LOW_ACK); 3794 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3795 case_WLAN(QSTA_LEAVE_QBSS); 3796 case_WLAN(QSTA_NOT_USE); 3797 case_WLAN(QSTA_REQUIRE_SETUP); 3798 case_WLAN(QSTA_TIMEOUT); 3799 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3800 case_WLAN(MESH_PEER_CANCELED); 3801 case_WLAN(MESH_MAX_PEERS); 3802 case_WLAN(MESH_CONFIG); 3803 case_WLAN(MESH_CLOSE); 3804 case_WLAN(MESH_MAX_RETRIES); 3805 case_WLAN(MESH_CONFIRM_TIMEOUT); 3806 case_WLAN(MESH_INVALID_GTK); 3807 case_WLAN(MESH_INCONSISTENT_PARAM); 3808 case_WLAN(MESH_INVALID_SECURITY); 3809 case_WLAN(MESH_PATH_ERROR); 3810 case_WLAN(MESH_PATH_NOFORWARD); 3811 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3812 case_WLAN(MAC_EXISTS_IN_MBSS); 3813 case_WLAN(MESH_CHAN_REGULATORY); 3814 case_WLAN(MESH_CHAN); 3815 default: return "<unknown>"; 3816 } 3817 } 3818 3819 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3820 struct ieee80211_mgmt *mgmt, size_t len) 3821 { 3822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3823 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3824 3825 sdata_assert_lock(sdata); 3826 3827 if (len < 24 + 2) 3828 return; 3829 3830 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3831 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3832 return; 3833 } 3834 3835 if (ifmgd->associated && 3836 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3837 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3838 sdata->vif.cfg.ap_addr, reason_code, 3839 ieee80211_get_reason_code_string(reason_code)); 3840 3841 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3842 3843 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3844 reason_code, false); 3845 return; 3846 } 3847 3848 if (ifmgd->assoc_data && 3849 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3850 sdata_info(sdata, 3851 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3852 ifmgd->assoc_data->ap_addr, reason_code, 3853 ieee80211_get_reason_code_string(reason_code)); 3854 3855 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3856 3857 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3858 return; 3859 } 3860 } 3861 3862 3863 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3864 struct ieee80211_mgmt *mgmt, size_t len) 3865 { 3866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3867 u16 reason_code; 3868 3869 sdata_assert_lock(sdata); 3870 3871 if (len < 24 + 2) 3872 return; 3873 3874 if (!ifmgd->associated || 3875 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3876 return; 3877 3878 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3879 3880 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3881 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3882 return; 3883 } 3884 3885 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3886 sdata->vif.cfg.ap_addr, reason_code, 3887 ieee80211_get_reason_code_string(reason_code)); 3888 3889 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3890 3891 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3892 false); 3893 } 3894 3895 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3896 u8 *supp_rates, unsigned int supp_rates_len, 3897 u32 *rates, u32 *basic_rates, 3898 bool *have_higher_than_11mbit, 3899 int *min_rate, int *min_rate_index, 3900 int shift) 3901 { 3902 int i, j; 3903 3904 for (i = 0; i < supp_rates_len; i++) { 3905 int rate = supp_rates[i] & 0x7f; 3906 bool is_basic = !!(supp_rates[i] & 0x80); 3907 3908 if ((rate * 5 * (1 << shift)) > 110) 3909 *have_higher_than_11mbit = true; 3910 3911 /* 3912 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3913 * since they're not rates. 3914 * 3915 * Note: Even though the membership selector and the basic 3916 * rate flag share the same bit, they are not exactly 3917 * the same. 3918 */ 3919 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3920 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3921 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3922 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3923 continue; 3924 3925 for (j = 0; j < sband->n_bitrates; j++) { 3926 struct ieee80211_rate *br; 3927 int brate; 3928 3929 br = &sband->bitrates[j]; 3930 3931 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3932 if (brate == rate) { 3933 *rates |= BIT(j); 3934 if (is_basic) 3935 *basic_rates |= BIT(j); 3936 if ((rate * 5) < *min_rate) { 3937 *min_rate = rate * 5; 3938 *min_rate_index = j; 3939 } 3940 break; 3941 } 3942 } 3943 } 3944 } 3945 3946 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3947 struct ieee80211_supported_band *sband, 3948 const struct link_sta_info *link_sta, 3949 const struct ieee802_11_elems *elems) 3950 { 3951 const struct ieee80211_sta_he_cap *own_he_cap = 3952 ieee80211_get_he_iftype_cap(sband, 3953 ieee80211_vif_type_p2p(&sdata->vif)); 3954 3955 if (elems->ext_capab_len < 10) 3956 return false; 3957 3958 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3959 return false; 3960 3961 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3962 IEEE80211_HE_MAC_CAP0_TWT_RES && 3963 own_he_cap && 3964 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3965 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3966 } 3967 3968 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3969 struct ieee80211_supported_band *sband, 3970 struct ieee80211_link_data *link, 3971 struct link_sta_info *link_sta, 3972 struct ieee802_11_elems *elems) 3973 { 3974 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3975 3976 if (link->conf->twt_requester != twt) { 3977 link->conf->twt_requester = twt; 3978 return BSS_CHANGED_TWT; 3979 } 3980 return 0; 3981 } 3982 3983 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3984 struct ieee80211_bss_conf *bss_conf, 3985 struct ieee80211_supported_band *sband, 3986 struct link_sta_info *link_sta) 3987 { 3988 const struct ieee80211_sta_he_cap *own_he_cap = 3989 ieee80211_get_he_iftype_cap(sband, 3990 ieee80211_vif_type_p2p(&sdata->vif)); 3991 3992 return bss_conf->he_support && 3993 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3994 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3995 own_he_cap && 3996 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3997 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3998 } 3999 4000 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4001 struct link_sta_info *link_sta, 4002 struct cfg80211_bss *cbss, 4003 struct ieee80211_mgmt *mgmt, 4004 const u8 *elem_start, 4005 unsigned int elem_len, 4006 u64 *changed) 4007 { 4008 struct ieee80211_sub_if_data *sdata = link->sdata; 4009 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4010 struct ieee80211_bss_conf *bss_conf = link->conf; 4011 struct ieee80211_local *local = sdata->local; 4012 unsigned int link_id = link->link_id; 4013 struct ieee80211_elems_parse_params parse_params = { 4014 .start = elem_start, 4015 .len = elem_len, 4016 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4017 .from_ap = true, 4018 }; 4019 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4020 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4021 const struct cfg80211_bss_ies *bss_ies = NULL; 4022 struct ieee80211_supported_band *sband; 4023 struct ieee802_11_elems *elems; 4024 u16 capab_info; 4025 bool ret; 4026 4027 elems = ieee802_11_parse_elems_full(&parse_params); 4028 if (!elems) 4029 return false; 4030 4031 if (link_id == assoc_data->assoc_link_id) { 4032 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4033 4034 /* 4035 * we should not get to this flow unless the association was 4036 * successful, so set the status directly to success 4037 */ 4038 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4039 } else if (!elems->prof) { 4040 ret = false; 4041 goto out; 4042 } else { 4043 const u8 *ptr = elems->prof->variable + 4044 elems->prof->sta_info_len - 1; 4045 4046 /* 4047 * During parsing, we validated that these fields exist, 4048 * otherwise elems->prof would have been set to NULL. 4049 */ 4050 capab_info = get_unaligned_le16(ptr); 4051 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4052 4053 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4054 link_info(link, "association response status code=%u\n", 4055 assoc_data->link[link_id].status); 4056 ret = true; 4057 goto out; 4058 } 4059 } 4060 4061 if (!is_s1g && !elems->supp_rates) { 4062 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4063 ret = false; 4064 goto out; 4065 } 4066 4067 link->u.mgd.tdls_chan_switch_prohibited = 4068 elems->ext_capab && elems->ext_capab_len >= 5 && 4069 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4070 4071 /* 4072 * Some APs are erroneously not including some information in their 4073 * (re)association response frames. Try to recover by using the data 4074 * from the beacon or probe response. This seems to afflict mobile 4075 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4076 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4077 */ 4078 if (!is_6ghz && 4079 ((assoc_data->wmm && !elems->wmm_param) || 4080 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4081 (!elems->ht_cap_elem || !elems->ht_operation)) || 4082 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4083 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4084 const struct cfg80211_bss_ies *ies; 4085 struct ieee802_11_elems *bss_elems; 4086 4087 rcu_read_lock(); 4088 ies = rcu_dereference(cbss->ies); 4089 if (ies) 4090 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4091 GFP_ATOMIC); 4092 rcu_read_unlock(); 4093 if (!bss_ies) { 4094 ret = false; 4095 goto out; 4096 } 4097 4098 parse_params.start = bss_ies->data; 4099 parse_params.len = bss_ies->len; 4100 parse_params.bss = cbss; 4101 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4102 if (!bss_elems) { 4103 ret = false; 4104 goto out; 4105 } 4106 4107 if (assoc_data->wmm && 4108 !elems->wmm_param && bss_elems->wmm_param) { 4109 elems->wmm_param = bss_elems->wmm_param; 4110 sdata_info(sdata, 4111 "AP bug: WMM param missing from AssocResp\n"); 4112 } 4113 4114 /* 4115 * Also check if we requested HT/VHT, otherwise the AP doesn't 4116 * have to include the IEs in the (re)association response. 4117 */ 4118 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4119 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4120 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4121 sdata_info(sdata, 4122 "AP bug: HT capability missing from AssocResp\n"); 4123 } 4124 if (!elems->ht_operation && bss_elems->ht_operation && 4125 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4126 elems->ht_operation = bss_elems->ht_operation; 4127 sdata_info(sdata, 4128 "AP bug: HT operation missing from AssocResp\n"); 4129 } 4130 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4131 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4132 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4133 sdata_info(sdata, 4134 "AP bug: VHT capa missing from AssocResp\n"); 4135 } 4136 if (!elems->vht_operation && bss_elems->vht_operation && 4137 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4138 elems->vht_operation = bss_elems->vht_operation; 4139 sdata_info(sdata, 4140 "AP bug: VHT operation missing from AssocResp\n"); 4141 } 4142 4143 kfree(bss_elems); 4144 } 4145 4146 /* 4147 * We previously checked these in the beacon/probe response, so 4148 * they should be present here. This is just a safety net. 4149 */ 4150 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4151 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4152 sdata_info(sdata, 4153 "HT AP is missing WMM params or HT capability/operation\n"); 4154 ret = false; 4155 goto out; 4156 } 4157 4158 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4159 (!elems->vht_cap_elem || !elems->vht_operation)) { 4160 sdata_info(sdata, 4161 "VHT AP is missing VHT capability/operation\n"); 4162 ret = false; 4163 goto out; 4164 } 4165 4166 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4167 !elems->he_6ghz_capa) { 4168 sdata_info(sdata, 4169 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4170 ret = false; 4171 goto out; 4172 } 4173 4174 if (WARN_ON(!link->conf->chandef.chan)) { 4175 ret = false; 4176 goto out; 4177 } 4178 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4179 4180 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4181 (!elems->he_cap || !elems->he_operation)) { 4182 sdata_info(sdata, 4183 "HE AP is missing HE capability/operation\n"); 4184 ret = false; 4185 goto out; 4186 } 4187 4188 /* Set up internal HT/VHT capabilities */ 4189 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4190 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4191 elems->ht_cap_elem, 4192 link_sta); 4193 4194 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4195 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4196 elems->vht_cap_elem, 4197 link_sta); 4198 4199 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4200 elems->he_cap) { 4201 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4202 elems->he_cap, 4203 elems->he_cap_len, 4204 elems->he_6ghz_capa, 4205 link_sta); 4206 4207 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4208 if (elems->rsnx && elems->rsnx_len && 4209 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4210 wiphy_ext_feature_isset(local->hw.wiphy, 4211 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4212 bss_conf->twt_protected = true; 4213 else 4214 bss_conf->twt_protected = false; 4215 4216 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4217 link_sta, elems); 4218 4219 if (elems->eht_operation && elems->eht_cap && 4220 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4221 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4222 elems->he_cap, 4223 elems->he_cap_len, 4224 elems->eht_cap, 4225 elems->eht_cap_len, 4226 link_sta); 4227 4228 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4229 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4230 } else { 4231 bss_conf->eht_support = false; 4232 } 4233 } else { 4234 bss_conf->he_support = false; 4235 bss_conf->twt_requester = false; 4236 bss_conf->twt_protected = false; 4237 bss_conf->eht_support = false; 4238 } 4239 4240 bss_conf->twt_broadcast = 4241 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4242 4243 if (bss_conf->he_support) { 4244 bss_conf->he_bss_color.color = 4245 le32_get_bits(elems->he_operation->he_oper_params, 4246 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4247 bss_conf->he_bss_color.partial = 4248 le32_get_bits(elems->he_operation->he_oper_params, 4249 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4250 bss_conf->he_bss_color.enabled = 4251 !le32_get_bits(elems->he_operation->he_oper_params, 4252 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4253 4254 if (bss_conf->he_bss_color.enabled) 4255 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4256 4257 bss_conf->htc_trig_based_pkt_ext = 4258 le32_get_bits(elems->he_operation->he_oper_params, 4259 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4260 bss_conf->frame_time_rts_th = 4261 le32_get_bits(elems->he_operation->he_oper_params, 4262 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4263 4264 bss_conf->uora_exists = !!elems->uora_element; 4265 if (elems->uora_element) 4266 bss_conf->uora_ocw_range = elems->uora_element[0]; 4267 4268 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4269 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4270 /* TODO: OPEN: what happens if BSS color disable is set? */ 4271 } 4272 4273 if (cbss->transmitted_bss) { 4274 bss_conf->nontransmitted = true; 4275 ether_addr_copy(bss_conf->transmitter_bssid, 4276 cbss->transmitted_bss->bssid); 4277 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4278 bss_conf->bssid_index = cbss->bssid_index; 4279 } 4280 4281 /* 4282 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4283 * in their association response, so ignore that data for our own 4284 * configuration. If it changed since the last beacon, we'll get the 4285 * next beacon and update then. 4286 */ 4287 4288 /* 4289 * If an operating mode notification IE is present, override the 4290 * NSS calculation (that would be done in rate_control_rate_init()) 4291 * and use the # of streams from that element. 4292 */ 4293 if (elems->opmode_notif && 4294 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4295 u8 nss; 4296 4297 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4298 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4299 nss += 1; 4300 link_sta->pub->rx_nss = nss; 4301 } 4302 4303 /* 4304 * Always handle WMM once after association regardless 4305 * of the first value the AP uses. Setting -1 here has 4306 * that effect because the AP values is an unsigned 4307 * 4-bit value. 4308 */ 4309 link->u.mgd.wmm_last_param_set = -1; 4310 link->u.mgd.mu_edca_last_param_set = -1; 4311 4312 if (link->u.mgd.disable_wmm_tracking) { 4313 ieee80211_set_wmm_default(link, false, false); 4314 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4315 elems->wmm_param_len, 4316 elems->mu_edca_param_set)) { 4317 /* still enable QoS since we might have HT/VHT */ 4318 ieee80211_set_wmm_default(link, false, true); 4319 /* disable WMM tracking in this case to disable 4320 * tracking WMM parameter changes in the beacon if 4321 * the parameters weren't actually valid. Doing so 4322 * avoids changing parameters very strangely when 4323 * the AP is going back and forth between valid and 4324 * invalid parameters. 4325 */ 4326 link->u.mgd.disable_wmm_tracking = true; 4327 } 4328 4329 if (elems->max_idle_period_ie) { 4330 bss_conf->max_idle_period = 4331 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4332 bss_conf->protected_keep_alive = 4333 !!(elems->max_idle_period_ie->idle_options & 4334 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4335 *changed |= BSS_CHANGED_KEEP_ALIVE; 4336 } else { 4337 bss_conf->max_idle_period = 0; 4338 bss_conf->protected_keep_alive = false; 4339 } 4340 4341 /* set assoc capability (AID was already set earlier), 4342 * ieee80211_set_associated() will tell the driver */ 4343 bss_conf->assoc_capability = capab_info; 4344 4345 ret = true; 4346 out: 4347 kfree(elems); 4348 kfree(bss_ies); 4349 return ret; 4350 } 4351 4352 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4353 struct sta_info *sta, 4354 struct link_sta_info *link_sta, 4355 struct cfg80211_bss *cbss) 4356 { 4357 struct ieee80211_sub_if_data *sdata = link->sdata; 4358 struct ieee80211_local *local = sdata->local; 4359 struct ieee80211_bss *bss = (void *)cbss->priv; 4360 u32 rates = 0, basic_rates = 0; 4361 bool have_higher_than_11mbit = false; 4362 int min_rate = INT_MAX, min_rate_index = -1; 4363 /* this is clearly wrong for MLO but we'll just remove it later */ 4364 int shift = ieee80211_vif_get_shift(&sdata->vif); 4365 struct ieee80211_supported_band *sband; 4366 4367 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4368 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4369 4370 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4371 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4372 ieee80211_s1g_sta_rate_init(sta); 4373 return 0; 4374 } 4375 4376 sband = local->hw.wiphy->bands[cbss->channel->band]; 4377 4378 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4379 &rates, &basic_rates, &have_higher_than_11mbit, 4380 &min_rate, &min_rate_index, shift); 4381 4382 /* 4383 * This used to be a workaround for basic rates missing 4384 * in the association response frame. Now that we no 4385 * longer use the basic rates from there, it probably 4386 * doesn't happen any more, but keep the workaround so 4387 * in case some *other* APs are buggy in different ways 4388 * we can connect -- with a warning. 4389 * Allow this workaround only in case the AP provided at least 4390 * one rate. 4391 */ 4392 if (min_rate_index < 0) { 4393 link_info(link, "No legacy rates in association response\n"); 4394 return -EINVAL; 4395 } else if (!basic_rates) { 4396 link_info(link, "No basic rates, using min rate instead\n"); 4397 basic_rates = BIT(min_rate_index); 4398 } 4399 4400 if (rates) 4401 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4402 else 4403 link_info(link, "No rates found, keeping mandatory only\n"); 4404 4405 link->conf->basic_rates = basic_rates; 4406 4407 /* cf. IEEE 802.11 9.2.12 */ 4408 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4409 have_higher_than_11mbit; 4410 4411 return 0; 4412 } 4413 4414 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4415 struct cfg80211_bss *cbss) 4416 { 4417 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4418 const struct element *ht_cap_elem, *vht_cap_elem; 4419 const struct cfg80211_bss_ies *ies; 4420 const struct ieee80211_ht_cap *ht_cap; 4421 const struct ieee80211_vht_cap *vht_cap; 4422 const struct ieee80211_he_cap_elem *he_cap; 4423 const struct element *he_cap_elem; 4424 u16 mcs_80_map, mcs_160_map; 4425 int i, mcs_nss_size; 4426 bool support_160; 4427 u8 chains = 1; 4428 4429 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4430 return chains; 4431 4432 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4433 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4434 ht_cap = (void *)ht_cap_elem->data; 4435 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4436 /* 4437 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4438 * "Tx Unequal Modulation Supported" fields. 4439 */ 4440 } 4441 4442 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4443 return chains; 4444 4445 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4446 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4447 u8 nss; 4448 u16 tx_mcs_map; 4449 4450 vht_cap = (void *)vht_cap_elem->data; 4451 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4452 for (nss = 8; nss > 0; nss--) { 4453 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4454 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4455 break; 4456 } 4457 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4458 chains = max(chains, nss); 4459 } 4460 4461 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4462 return chains; 4463 4464 ies = rcu_dereference(cbss->ies); 4465 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4466 ies->data, ies->len); 4467 4468 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4469 return chains; 4470 4471 /* skip one byte ext_tag_id */ 4472 he_cap = (void *)(he_cap_elem->data + 1); 4473 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4474 4475 /* invalid HE IE */ 4476 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4477 return chains; 4478 4479 /* mcs_nss is right after he_cap info */ 4480 he_mcs_nss_supp = (void *)(he_cap + 1); 4481 4482 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4483 4484 for (i = 7; i >= 0; i--) { 4485 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4486 4487 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4488 chains = max_t(u8, chains, i + 1); 4489 break; 4490 } 4491 } 4492 4493 support_160 = he_cap->phy_cap_info[0] & 4494 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4495 4496 if (!support_160) 4497 return chains; 4498 4499 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4500 for (i = 7; i >= 0; i--) { 4501 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4502 4503 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4504 chains = max_t(u8, chains, i + 1); 4505 break; 4506 } 4507 } 4508 4509 return chains; 4510 } 4511 4512 static bool 4513 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4514 const struct cfg80211_bss_ies *ies, 4515 const struct ieee80211_he_operation *he_op) 4516 { 4517 const struct element *he_cap_elem; 4518 const struct ieee80211_he_cap_elem *he_cap; 4519 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4520 u16 mcs_80_map_tx, mcs_80_map_rx; 4521 u16 ap_min_req_set; 4522 int mcs_nss_size; 4523 int nss; 4524 4525 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4526 ies->data, ies->len); 4527 4528 if (!he_cap_elem) 4529 return false; 4530 4531 /* invalid HE IE */ 4532 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4533 sdata_info(sdata, 4534 "Invalid HE elem, Disable HE\n"); 4535 return false; 4536 } 4537 4538 /* skip one byte ext_tag_id */ 4539 he_cap = (void *)(he_cap_elem->data + 1); 4540 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4541 4542 /* invalid HE IE */ 4543 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4544 sdata_info(sdata, 4545 "Invalid HE elem with nss size, Disable HE\n"); 4546 return false; 4547 } 4548 4549 /* mcs_nss is right after he_cap info */ 4550 he_mcs_nss_supp = (void *)(he_cap + 1); 4551 4552 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4553 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4554 4555 /* P802.11-REVme/D0.3 4556 * 27.1.1 Introduction to the HE PHY 4557 * ... 4558 * An HE STA shall support the following features: 4559 * ... 4560 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4561 * supported channel widths for HE SU PPDUs 4562 */ 4563 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4564 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4565 sdata_info(sdata, 4566 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4567 mcs_80_map_tx, mcs_80_map_rx); 4568 return false; 4569 } 4570 4571 if (!he_op) 4572 return true; 4573 4574 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4575 4576 /* 4577 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4578 * zeroes, which is nonsense, and completely inconsistent with itself 4579 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4580 */ 4581 if (!ap_min_req_set) 4582 return true; 4583 4584 /* make sure the AP is consistent with itself 4585 * 4586 * P802.11-REVme/D0.3 4587 * 26.17.1 Basic HE BSS operation 4588 * 4589 * A STA that is operating in an HE BSS shall be able to receive and 4590 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4591 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4592 * MLME-START.request primitive and shall be able to receive at each of 4593 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4594 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4595 * primitive 4596 */ 4597 for (nss = 8; nss > 0; nss--) { 4598 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4599 u8 ap_rx_val; 4600 u8 ap_tx_val; 4601 4602 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4603 continue; 4604 4605 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4606 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4607 4608 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4609 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4610 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4611 sdata_info(sdata, 4612 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4613 nss, ap_rx_val, ap_rx_val, ap_op_val); 4614 return false; 4615 } 4616 } 4617 4618 return true; 4619 } 4620 4621 static bool 4622 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4623 struct ieee80211_supported_band *sband, 4624 const struct ieee80211_he_operation *he_op) 4625 { 4626 const struct ieee80211_sta_he_cap *sta_he_cap = 4627 ieee80211_get_he_iftype_cap(sband, 4628 ieee80211_vif_type_p2p(&sdata->vif)); 4629 u16 ap_min_req_set; 4630 int i; 4631 4632 if (!sta_he_cap || !he_op) 4633 return false; 4634 4635 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4636 4637 /* 4638 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4639 * zeroes, which is nonsense, and completely inconsistent with itself 4640 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4641 */ 4642 if (!ap_min_req_set) 4643 return true; 4644 4645 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4646 for (i = 0; i < 3; i++) { 4647 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4648 &sta_he_cap->he_mcs_nss_supp; 4649 u16 sta_mcs_map_rx = 4650 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4651 u16 sta_mcs_map_tx = 4652 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4653 u8 nss; 4654 bool verified = true; 4655 4656 /* 4657 * For each band there is a maximum of 8 spatial streams 4658 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4659 * of 2 bits per NSS (1-8), with the values defined in enum 4660 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4661 * capabilities aren't less than the AP's minimum requirements 4662 * for this HE BSS per SS. 4663 * It is enough to find one such band that meets the reqs. 4664 */ 4665 for (nss = 8; nss > 0; nss--) { 4666 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4667 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4668 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4669 4670 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4671 continue; 4672 4673 /* 4674 * Make sure the HE AP doesn't require MCSs that aren't 4675 * supported by the client as required by spec 4676 * 4677 * P802.11-REVme/D0.3 4678 * 26.17.1 Basic HE BSS operation 4679 * 4680 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4681 * a BSS, unless it supports (i.e., is able to both transmit and 4682 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4683 * HE-MCS and NSS set. 4684 */ 4685 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4686 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4687 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4688 verified = false; 4689 break; 4690 } 4691 } 4692 4693 if (verified) 4694 return true; 4695 } 4696 4697 /* If here, STA doesn't meet AP's HE min requirements */ 4698 return false; 4699 } 4700 4701 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4702 struct ieee80211_link_data *link, 4703 struct cfg80211_bss *cbss, 4704 ieee80211_conn_flags_t *conn_flags) 4705 { 4706 struct ieee80211_local *local = sdata->local; 4707 const struct ieee80211_ht_cap *ht_cap = NULL; 4708 const struct ieee80211_ht_operation *ht_oper = NULL; 4709 const struct ieee80211_vht_operation *vht_oper = NULL; 4710 const struct ieee80211_he_operation *he_oper = NULL; 4711 const struct ieee80211_eht_operation *eht_oper = NULL; 4712 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4713 struct ieee80211_supported_band *sband; 4714 struct cfg80211_chan_def chandef; 4715 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4716 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4717 struct ieee80211_bss *bss = (void *)cbss->priv; 4718 struct ieee80211_elems_parse_params parse_params = { 4719 .bss = cbss, 4720 .link_id = -1, 4721 .from_ap = true, 4722 }; 4723 struct ieee802_11_elems *elems; 4724 const struct cfg80211_bss_ies *ies; 4725 int ret; 4726 u32 i; 4727 bool have_80mhz; 4728 4729 rcu_read_lock(); 4730 4731 ies = rcu_dereference(cbss->ies); 4732 parse_params.start = ies->data; 4733 parse_params.len = ies->len; 4734 elems = ieee802_11_parse_elems_full(&parse_params); 4735 if (!elems) { 4736 rcu_read_unlock(); 4737 return -ENOMEM; 4738 } 4739 4740 sband = local->hw.wiphy->bands[cbss->channel->band]; 4741 4742 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4743 IEEE80211_CONN_DISABLE_80P80MHZ | 4744 IEEE80211_CONN_DISABLE_160MHZ); 4745 4746 /* disable HT/VHT/HE if we don't support them */ 4747 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4748 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4749 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4750 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4751 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4752 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4753 } 4754 4755 if (!sband->vht_cap.vht_supported && is_5ghz) { 4756 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4757 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4758 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4759 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4760 } 4761 4762 if (!ieee80211_get_he_iftype_cap(sband, 4763 ieee80211_vif_type_p2p(&sdata->vif))) { 4764 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4765 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4766 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4767 } 4768 4769 if (!ieee80211_get_eht_iftype_cap(sband, 4770 ieee80211_vif_type_p2p(&sdata->vif))) { 4771 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4772 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4773 } 4774 4775 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4776 ht_oper = elems->ht_operation; 4777 ht_cap = elems->ht_cap_elem; 4778 4779 if (!ht_cap) { 4780 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4781 ht_oper = NULL; 4782 } 4783 } 4784 4785 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4786 vht_oper = elems->vht_operation; 4787 if (vht_oper && !ht_oper) { 4788 vht_oper = NULL; 4789 sdata_info(sdata, 4790 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4791 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4792 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4793 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4794 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4795 } 4796 4797 if (!elems->vht_cap_elem) { 4798 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4799 vht_oper = NULL; 4800 } 4801 } 4802 4803 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4804 he_oper = elems->he_operation; 4805 4806 if (link && is_6ghz) { 4807 struct ieee80211_bss_conf *bss_conf; 4808 u8 j = 0; 4809 4810 bss_conf = link->conf; 4811 4812 if (elems->pwr_constr_elem) 4813 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4814 4815 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4816 ARRAY_SIZE(elems->tx_pwr_env)); 4817 4818 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4819 if (elems->tx_pwr_env_len[i] > 4820 sizeof(bss_conf->tx_pwr_env[j])) 4821 continue; 4822 4823 bss_conf->tx_pwr_env_num++; 4824 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4825 elems->tx_pwr_env_len[i]); 4826 j++; 4827 } 4828 } 4829 4830 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4831 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4832 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4833 IEEE80211_CONN_DISABLE_EHT; 4834 } 4835 4836 /* 4837 * EHT requires HE to be supported as well. Specifically for 6 GHz 4838 * channels, the operation channel information can only be deduced from 4839 * both the 6 GHz operation information (from the HE operation IE) and 4840 * EHT operation. 4841 */ 4842 if (!(*conn_flags & 4843 (IEEE80211_CONN_DISABLE_HE | 4844 IEEE80211_CONN_DISABLE_EHT)) && 4845 he_oper) { 4846 const struct cfg80211_bss_ies *cbss_ies; 4847 const u8 *eht_oper_ie; 4848 4849 cbss_ies = rcu_dereference(cbss->ies); 4850 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4851 cbss_ies->data, cbss_ies->len); 4852 if (eht_oper_ie && eht_oper_ie[1] >= 4853 1 + sizeof(struct ieee80211_eht_operation)) 4854 eht_oper = (void *)(eht_oper_ie + 3); 4855 else 4856 eht_oper = NULL; 4857 } 4858 4859 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4860 have_80mhz = false; 4861 for (i = 0; i < sband->n_channels; i++) { 4862 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4863 IEEE80211_CHAN_NO_80MHZ)) 4864 continue; 4865 4866 have_80mhz = true; 4867 break; 4868 } 4869 4870 if (!have_80mhz) { 4871 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4872 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4873 } 4874 4875 if (sband->band == NL80211_BAND_S1GHZ) { 4876 s1g_oper = elems->s1g_oper; 4877 if (!s1g_oper) 4878 sdata_info(sdata, 4879 "AP missing S1G operation element?\n"); 4880 } 4881 4882 *conn_flags |= 4883 ieee80211_determine_chantype(sdata, link, *conn_flags, 4884 sband, 4885 cbss->channel, 4886 bss->vht_cap_info, 4887 ht_oper, vht_oper, 4888 he_oper, eht_oper, 4889 s1g_oper, 4890 &chandef, false); 4891 4892 if (link) 4893 link->needed_rx_chains = 4894 min(ieee80211_max_rx_chains(link, cbss), 4895 local->rx_chains); 4896 4897 rcu_read_unlock(); 4898 /* the element data was RCU protected so no longer valid anyway */ 4899 kfree(elems); 4900 elems = NULL; 4901 4902 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4903 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4904 return -EINVAL; 4905 } 4906 4907 if (!link) 4908 return 0; 4909 4910 /* will change later if needed */ 4911 link->smps_mode = IEEE80211_SMPS_OFF; 4912 4913 mutex_lock(&local->mtx); 4914 /* 4915 * If this fails (possibly due to channel context sharing 4916 * on incompatible channels, e.g. 80+80 and 160 sharing the 4917 * same control channel) try to use a smaller bandwidth. 4918 */ 4919 ret = ieee80211_link_use_channel(link, &chandef, 4920 IEEE80211_CHANCTX_SHARED); 4921 4922 /* don't downgrade for 5 and 10 MHz channels, though. */ 4923 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4924 chandef.width == NL80211_CHAN_WIDTH_10) 4925 goto out; 4926 4927 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4928 *conn_flags |= 4929 ieee80211_chandef_downgrade(&chandef); 4930 ret = ieee80211_link_use_channel(link, &chandef, 4931 IEEE80211_CHANCTX_SHARED); 4932 } 4933 out: 4934 mutex_unlock(&local->mtx); 4935 return ret; 4936 } 4937 4938 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4939 u8 *dtim_count, u8 *dtim_period) 4940 { 4941 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4942 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4943 ies->len); 4944 const struct ieee80211_tim_ie *tim = NULL; 4945 const struct ieee80211_bssid_index *idx; 4946 bool valid = tim_ie && tim_ie[1] >= 2; 4947 4948 if (valid) 4949 tim = (void *)(tim_ie + 2); 4950 4951 if (dtim_count) 4952 *dtim_count = valid ? tim->dtim_count : 0; 4953 4954 if (dtim_period) 4955 *dtim_period = valid ? tim->dtim_period : 0; 4956 4957 /* Check if value is overridden by non-transmitted profile */ 4958 if (!idx_ie || idx_ie[1] < 3) 4959 return valid; 4960 4961 idx = (void *)(idx_ie + 2); 4962 4963 if (dtim_count) 4964 *dtim_count = idx->dtim_count; 4965 4966 if (dtim_period) 4967 *dtim_period = idx->dtim_period; 4968 4969 return true; 4970 } 4971 4972 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4973 struct ieee80211_mgmt *mgmt, 4974 struct ieee802_11_elems *elems, 4975 const u8 *elem_start, unsigned int elem_len) 4976 { 4977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4978 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4979 struct ieee80211_local *local = sdata->local; 4980 unsigned int link_id; 4981 struct sta_info *sta; 4982 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4983 u16 valid_links = 0; 4984 int err; 4985 4986 mutex_lock(&sdata->local->sta_mtx); 4987 /* 4988 * station info was already allocated and inserted before 4989 * the association and should be available to us 4990 */ 4991 sta = sta_info_get(sdata, assoc_data->ap_addr); 4992 if (WARN_ON(!sta)) 4993 goto out_err; 4994 4995 if (sdata->vif.valid_links) { 4996 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4997 if (!assoc_data->link[link_id].bss) 4998 continue; 4999 valid_links |= BIT(link_id); 5000 5001 if (link_id != assoc_data->assoc_link_id) { 5002 err = ieee80211_sta_allocate_link(sta, link_id); 5003 if (err) 5004 goto out_err; 5005 } 5006 } 5007 5008 ieee80211_vif_set_links(sdata, valid_links); 5009 } 5010 5011 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5012 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5013 struct ieee80211_link_data *link; 5014 struct link_sta_info *link_sta; 5015 5016 if (!cbss) 5017 continue; 5018 5019 link = sdata_dereference(sdata->link[link_id], sdata); 5020 if (WARN_ON(!link)) 5021 goto out_err; 5022 5023 if (sdata->vif.valid_links) 5024 link_info(link, 5025 "local address %pM, AP link address %pM%s\n", 5026 link->conf->addr, 5027 assoc_data->link[link_id].bss->bssid, 5028 link_id == assoc_data->assoc_link_id ? 5029 " (assoc)" : ""); 5030 5031 link_sta = rcu_dereference_protected(sta->link[link_id], 5032 lockdep_is_held(&local->sta_mtx)); 5033 if (WARN_ON(!link_sta)) 5034 goto out_err; 5035 5036 if (!link->u.mgd.have_beacon) { 5037 const struct cfg80211_bss_ies *ies; 5038 5039 rcu_read_lock(); 5040 ies = rcu_dereference(cbss->beacon_ies); 5041 if (ies) 5042 link->u.mgd.have_beacon = true; 5043 else 5044 ies = rcu_dereference(cbss->ies); 5045 ieee80211_get_dtim(ies, 5046 &link->conf->sync_dtim_count, 5047 &link->u.mgd.dtim_period); 5048 link->conf->beacon_int = cbss->beacon_interval; 5049 rcu_read_unlock(); 5050 } 5051 5052 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5053 5054 if (link_id != assoc_data->assoc_link_id) { 5055 err = ieee80211_prep_channel(sdata, link, cbss, 5056 &link->u.mgd.conn_flags); 5057 if (err) { 5058 link_info(link, "prep_channel failed\n"); 5059 goto out_err; 5060 } 5061 } 5062 5063 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5064 assoc_data->link[link_id].bss); 5065 if (err) 5066 goto out_err; 5067 5068 if (!ieee80211_assoc_config_link(link, link_sta, 5069 assoc_data->link[link_id].bss, 5070 mgmt, elem_start, elem_len, 5071 &changed[link_id])) 5072 goto out_err; 5073 5074 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5075 valid_links &= ~BIT(link_id); 5076 ieee80211_sta_remove_link(sta, link_id); 5077 continue; 5078 } 5079 5080 if (link_id != assoc_data->assoc_link_id) { 5081 err = ieee80211_sta_activate_link(sta, link_id); 5082 if (err) 5083 goto out_err; 5084 } 5085 } 5086 5087 /* links might have changed due to rejected ones, set them again */ 5088 ieee80211_vif_set_links(sdata, valid_links); 5089 5090 rate_control_rate_init(sta); 5091 5092 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5093 set_sta_flag(sta, WLAN_STA_MFP); 5094 sta->sta.mfp = true; 5095 } else { 5096 sta->sta.mfp = false; 5097 } 5098 5099 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5100 elems->ext_capab_len); 5101 5102 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5103 local->hw.queues >= IEEE80211_NUM_ACS; 5104 5105 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5106 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5107 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5108 if (err) { 5109 sdata_info(sdata, 5110 "failed to move station %pM to desired state\n", 5111 sta->sta.addr); 5112 WARN_ON(__sta_info_destroy(sta)); 5113 goto out_err; 5114 } 5115 5116 if (sdata->wdev.use_4addr) 5117 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5118 5119 mutex_unlock(&sdata->local->sta_mtx); 5120 5121 ieee80211_set_associated(sdata, assoc_data, changed); 5122 5123 /* 5124 * If we're using 4-addr mode, let the AP know that we're 5125 * doing so, so that it can create the STA VLAN on its side 5126 */ 5127 if (ifmgd->use_4addr) 5128 ieee80211_send_4addr_nullfunc(local, sdata); 5129 5130 /* 5131 * Start timer to probe the connection to the AP now. 5132 * Also start the timer that will detect beacon loss. 5133 */ 5134 ieee80211_sta_reset_beacon_monitor(sdata); 5135 ieee80211_sta_reset_conn_monitor(sdata); 5136 5137 return true; 5138 out_err: 5139 eth_zero_addr(sdata->vif.cfg.ap_addr); 5140 mutex_unlock(&sdata->local->sta_mtx); 5141 return false; 5142 } 5143 5144 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5145 struct ieee80211_mgmt *mgmt, 5146 size_t len) 5147 { 5148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5149 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5150 u16 capab_info, status_code, aid; 5151 struct ieee80211_elems_parse_params parse_params = { 5152 .bss = NULL, 5153 .link_id = -1, 5154 .from_ap = true, 5155 }; 5156 struct ieee802_11_elems *elems; 5157 int ac; 5158 const u8 *elem_start; 5159 unsigned int elem_len; 5160 bool reassoc; 5161 struct ieee80211_event event = { 5162 .type = MLME_EVENT, 5163 .u.mlme.data = ASSOC_EVENT, 5164 }; 5165 struct ieee80211_prep_tx_info info = {}; 5166 struct cfg80211_rx_assoc_resp resp = { 5167 .uapsd_queues = -1, 5168 }; 5169 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5170 unsigned int link_id; 5171 5172 sdata_assert_lock(sdata); 5173 5174 if (!assoc_data) 5175 return; 5176 5177 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5178 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5179 return; 5180 5181 /* 5182 * AssocResp and ReassocResp have identical structure, so process both 5183 * of them in this function. 5184 */ 5185 5186 if (len < 24 + 6) 5187 return; 5188 5189 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5190 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5191 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5192 if (assoc_data->s1g) 5193 elem_start = mgmt->u.s1g_assoc_resp.variable; 5194 else 5195 elem_start = mgmt->u.assoc_resp.variable; 5196 5197 /* 5198 * Note: this may not be perfect, AP might misbehave - if 5199 * anyone needs to rely on perfect complete notification 5200 * with the exact right subtype, then we need to track what 5201 * we actually transmitted. 5202 */ 5203 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5204 IEEE80211_STYPE_ASSOC_REQ; 5205 5206 if (assoc_data->fils_kek_len && 5207 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5208 return; 5209 5210 elem_len = len - (elem_start - (u8 *)mgmt); 5211 parse_params.start = elem_start; 5212 parse_params.len = elem_len; 5213 elems = ieee802_11_parse_elems_full(&parse_params); 5214 if (!elems) 5215 goto notify_driver; 5216 5217 if (elems->aid_resp) 5218 aid = le16_to_cpu(elems->aid_resp->aid); 5219 else if (assoc_data->s1g) 5220 aid = 0; /* TODO */ 5221 else 5222 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5223 5224 /* 5225 * The 5 MSB of the AID field are reserved 5226 * (802.11-2016 9.4.1.8 AID field) 5227 */ 5228 aid &= 0x7ff; 5229 5230 sdata_info(sdata, 5231 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5232 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5233 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5234 5235 ifmgd->broken_ap = false; 5236 5237 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5238 elems->timeout_int && 5239 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5240 u32 tu, ms; 5241 5242 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5243 le32_to_cpu(elems->timeout_int->value)); 5244 5245 tu = le32_to_cpu(elems->timeout_int->value); 5246 ms = tu * 1024 / 1000; 5247 sdata_info(sdata, 5248 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5249 assoc_data->ap_addr, tu, ms); 5250 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5251 assoc_data->timeout_started = true; 5252 if (ms > IEEE80211_ASSOC_TIMEOUT) 5253 run_again(sdata, assoc_data->timeout); 5254 goto notify_driver; 5255 } 5256 5257 if (status_code != WLAN_STATUS_SUCCESS) { 5258 sdata_info(sdata, "%pM denied association (code=%d)\n", 5259 assoc_data->ap_addr, status_code); 5260 event.u.mlme.status = MLME_DENIED; 5261 event.u.mlme.reason = status_code; 5262 drv_event_callback(sdata->local, sdata, &event); 5263 } else { 5264 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5265 sdata_info(sdata, 5266 "invalid AID value %d (out of range), turn off PS\n", 5267 aid); 5268 aid = 0; 5269 ifmgd->broken_ap = true; 5270 } 5271 5272 if (sdata->vif.valid_links) { 5273 if (!elems->multi_link) { 5274 sdata_info(sdata, 5275 "MLO association with %pM but no multi-link element in response!\n", 5276 assoc_data->ap_addr); 5277 goto abandon_assoc; 5278 } 5279 5280 if (le16_get_bits(elems->multi_link->control, 5281 IEEE80211_ML_CONTROL_TYPE) != 5282 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5283 sdata_info(sdata, 5284 "bad multi-link element (control=0x%x)\n", 5285 le16_to_cpu(elems->multi_link->control)); 5286 goto abandon_assoc; 5287 } else { 5288 struct ieee80211_mle_basic_common_info *common; 5289 5290 common = (void *)elems->multi_link->variable; 5291 5292 if (memcmp(assoc_data->ap_addr, 5293 common->mld_mac_addr, ETH_ALEN)) { 5294 sdata_info(sdata, 5295 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5296 common->mld_mac_addr, 5297 assoc_data->ap_addr); 5298 goto abandon_assoc; 5299 } 5300 } 5301 } 5302 5303 sdata->vif.cfg.aid = aid; 5304 5305 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5306 elem_start, elem_len)) { 5307 /* oops -- internal error -- send timeout for now */ 5308 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5309 goto notify_driver; 5310 } 5311 event.u.mlme.status = MLME_SUCCESS; 5312 drv_event_callback(sdata->local, sdata, &event); 5313 sdata_info(sdata, "associated\n"); 5314 5315 info.success = 1; 5316 } 5317 5318 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5319 struct ieee80211_link_data *link; 5320 5321 link = sdata_dereference(sdata->link[link_id], sdata); 5322 if (!link) 5323 continue; 5324 5325 if (!assoc_data->link[link_id].bss) 5326 continue; 5327 5328 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5329 resp.links[link_id].addr = link->conf->addr; 5330 resp.links[link_id].status = assoc_data->link[link_id].status; 5331 5332 /* get uapsd queues configuration - same for all links */ 5333 resp.uapsd_queues = 0; 5334 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5335 if (link->tx_conf[ac].uapsd) 5336 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5337 } 5338 5339 if (sdata->vif.valid_links) { 5340 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5341 resp.ap_mld_addr = ap_mld_addr; 5342 } 5343 5344 ieee80211_destroy_assoc_data(sdata, 5345 status_code == WLAN_STATUS_SUCCESS ? 5346 ASSOC_SUCCESS : 5347 ASSOC_REJECTED); 5348 5349 resp.buf = (u8 *)mgmt; 5350 resp.len = len; 5351 resp.req_ies = ifmgd->assoc_req_ies; 5352 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5353 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5354 notify_driver: 5355 drv_mgd_complete_tx(sdata->local, sdata, &info); 5356 kfree(elems); 5357 return; 5358 abandon_assoc: 5359 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5360 goto notify_driver; 5361 } 5362 5363 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5364 struct ieee80211_mgmt *mgmt, size_t len, 5365 struct ieee80211_rx_status *rx_status) 5366 { 5367 struct ieee80211_sub_if_data *sdata = link->sdata; 5368 struct ieee80211_local *local = sdata->local; 5369 struct ieee80211_bss *bss; 5370 struct ieee80211_channel *channel; 5371 5372 sdata_assert_lock(sdata); 5373 5374 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5375 ieee80211_rx_status_to_khz(rx_status)); 5376 if (!channel) 5377 return; 5378 5379 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5380 if (bss) { 5381 link->conf->beacon_rate = bss->beacon_rate; 5382 ieee80211_rx_bss_put(local, bss); 5383 } 5384 } 5385 5386 5387 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5388 struct sk_buff *skb) 5389 { 5390 struct ieee80211_sub_if_data *sdata = link->sdata; 5391 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5392 struct ieee80211_if_managed *ifmgd; 5393 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5394 struct ieee80211_channel *channel; 5395 size_t baselen, len = skb->len; 5396 5397 ifmgd = &sdata->u.mgd; 5398 5399 sdata_assert_lock(sdata); 5400 5401 /* 5402 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5403 * "If a 6 GHz AP receives a Probe Request frame and responds with 5404 * a Probe Response frame [..], the Address 1 field of the Probe 5405 * Response frame shall be set to the broadcast address [..]" 5406 * So, on 6GHz band we should also accept broadcast responses. 5407 */ 5408 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5409 rx_status->freq); 5410 if (!channel) 5411 return; 5412 5413 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5414 (channel->band != NL80211_BAND_6GHZ || 5415 !is_broadcast_ether_addr(mgmt->da))) 5416 return; /* ignore ProbeResp to foreign address */ 5417 5418 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5419 if (baselen > len) 5420 return; 5421 5422 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5423 5424 if (ifmgd->associated && 5425 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5426 ieee80211_reset_ap_probe(sdata); 5427 } 5428 5429 /* 5430 * This is the canonical list of information elements we care about, 5431 * the filter code also gives us all changes to the Microsoft OUI 5432 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5433 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5434 * changes to requested client power. 5435 * 5436 * We implement beacon filtering in software since that means we can 5437 * avoid processing the frame here and in cfg80211, and userspace 5438 * will not be able to tell whether the hardware supports it or not. 5439 * 5440 * XXX: This list needs to be dynamic -- userspace needs to be able to 5441 * add items it requires. It also needs to be able to tell us to 5442 * look out for other vendor IEs. 5443 */ 5444 static const u64 care_about_ies = 5445 (1ULL << WLAN_EID_COUNTRY) | 5446 (1ULL << WLAN_EID_ERP_INFO) | 5447 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5448 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5449 (1ULL << WLAN_EID_HT_CAPABILITY) | 5450 (1ULL << WLAN_EID_HT_OPERATION) | 5451 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5452 5453 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5454 struct ieee80211_if_managed *ifmgd, 5455 struct ieee80211_bss_conf *bss_conf, 5456 struct ieee80211_local *local, 5457 struct ieee80211_rx_status *rx_status) 5458 { 5459 struct ieee80211_sub_if_data *sdata = link->sdata; 5460 5461 /* Track average RSSI from the Beacon frames of the current AP */ 5462 5463 if (!link->u.mgd.tracking_signal_avg) { 5464 link->u.mgd.tracking_signal_avg = true; 5465 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5466 link->u.mgd.last_cqm_event_signal = 0; 5467 link->u.mgd.count_beacon_signal = 1; 5468 link->u.mgd.last_ave_beacon_signal = 0; 5469 } else { 5470 link->u.mgd.count_beacon_signal++; 5471 } 5472 5473 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5474 -rx_status->signal); 5475 5476 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5477 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5478 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5479 int last_sig = link->u.mgd.last_ave_beacon_signal; 5480 struct ieee80211_event event = { 5481 .type = RSSI_EVENT, 5482 }; 5483 5484 /* 5485 * if signal crosses either of the boundaries, invoke callback 5486 * with appropriate parameters 5487 */ 5488 if (sig > ifmgd->rssi_max_thold && 5489 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5490 link->u.mgd.last_ave_beacon_signal = sig; 5491 event.u.rssi.data = RSSI_EVENT_HIGH; 5492 drv_event_callback(local, sdata, &event); 5493 } else if (sig < ifmgd->rssi_min_thold && 5494 (last_sig >= ifmgd->rssi_max_thold || 5495 last_sig == 0)) { 5496 link->u.mgd.last_ave_beacon_signal = sig; 5497 event.u.rssi.data = RSSI_EVENT_LOW; 5498 drv_event_callback(local, sdata, &event); 5499 } 5500 } 5501 5502 if (bss_conf->cqm_rssi_thold && 5503 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5504 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5505 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5506 int last_event = link->u.mgd.last_cqm_event_signal; 5507 int thold = bss_conf->cqm_rssi_thold; 5508 int hyst = bss_conf->cqm_rssi_hyst; 5509 5510 if (sig < thold && 5511 (last_event == 0 || sig < last_event - hyst)) { 5512 link->u.mgd.last_cqm_event_signal = sig; 5513 ieee80211_cqm_rssi_notify( 5514 &sdata->vif, 5515 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5516 sig, GFP_KERNEL); 5517 } else if (sig > thold && 5518 (last_event == 0 || sig > last_event + hyst)) { 5519 link->u.mgd.last_cqm_event_signal = sig; 5520 ieee80211_cqm_rssi_notify( 5521 &sdata->vif, 5522 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5523 sig, GFP_KERNEL); 5524 } 5525 } 5526 5527 if (bss_conf->cqm_rssi_low && 5528 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5529 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5530 int last_event = link->u.mgd.last_cqm_event_signal; 5531 int low = bss_conf->cqm_rssi_low; 5532 int high = bss_conf->cqm_rssi_high; 5533 5534 if (sig < low && 5535 (last_event == 0 || last_event >= low)) { 5536 link->u.mgd.last_cqm_event_signal = sig; 5537 ieee80211_cqm_rssi_notify( 5538 &sdata->vif, 5539 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5540 sig, GFP_KERNEL); 5541 } else if (sig > high && 5542 (last_event == 0 || last_event <= high)) { 5543 link->u.mgd.last_cqm_event_signal = sig; 5544 ieee80211_cqm_rssi_notify( 5545 &sdata->vif, 5546 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5547 sig, GFP_KERNEL); 5548 } 5549 } 5550 } 5551 5552 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5553 struct cfg80211_bss *bss) 5554 { 5555 if (ether_addr_equal(tx_bssid, bss->bssid)) 5556 return true; 5557 if (!bss->transmitted_bss) 5558 return false; 5559 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5560 } 5561 5562 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5563 const struct ieee80211_eht_operation *eht_oper, 5564 u64 *changed) 5565 { 5566 u16 bitmap = 0, extracted; 5567 5568 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5569 (eht_oper->params & 5570 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5571 const struct ieee80211_eht_operation_info *info = 5572 (void *)eht_oper->optional; 5573 const u8 *disable_subchannel_bitmap = info->optional; 5574 5575 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5576 } 5577 5578 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5579 &link->conf->chandef, 5580 bitmap); 5581 5582 /* accept if there are no changes */ 5583 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5584 extracted == link->conf->eht_puncturing) 5585 return true; 5586 5587 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5588 &link->conf->chandef)) { 5589 link_info(link, 5590 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5591 link->u.mgd.bssid, 5592 bitmap, 5593 link->conf->chandef.width); 5594 return false; 5595 } 5596 5597 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5598 return true; 5599 } 5600 5601 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5602 struct ieee80211_hdr *hdr, size_t len, 5603 struct ieee80211_rx_status *rx_status) 5604 { 5605 struct ieee80211_sub_if_data *sdata = link->sdata; 5606 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5607 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5608 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5609 struct ieee80211_mgmt *mgmt = (void *) hdr; 5610 size_t baselen; 5611 struct ieee802_11_elems *elems; 5612 struct ieee80211_local *local = sdata->local; 5613 struct ieee80211_chanctx_conf *chanctx_conf; 5614 struct ieee80211_supported_band *sband; 5615 struct ieee80211_channel *chan; 5616 struct link_sta_info *link_sta; 5617 struct sta_info *sta; 5618 u64 changed = 0; 5619 bool erp_valid; 5620 u8 erp_value = 0; 5621 u32 ncrc = 0; 5622 u8 *bssid, *variable = mgmt->u.beacon.variable; 5623 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5624 struct ieee80211_elems_parse_params parse_params = { 5625 .link_id = -1, 5626 .from_ap = true, 5627 }; 5628 5629 sdata_assert_lock(sdata); 5630 5631 /* Process beacon from the current BSS */ 5632 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5633 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5634 struct ieee80211_ext *ext = (void *) mgmt; 5635 5636 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5637 variable = ext->u.s1g_short_beacon.variable; 5638 else 5639 variable = ext->u.s1g_beacon.variable; 5640 } 5641 5642 baselen = (u8 *) variable - (u8 *) mgmt; 5643 if (baselen > len) 5644 return; 5645 5646 parse_params.start = variable; 5647 parse_params.len = len - baselen; 5648 5649 rcu_read_lock(); 5650 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5651 if (!chanctx_conf) { 5652 rcu_read_unlock(); 5653 return; 5654 } 5655 5656 if (ieee80211_rx_status_to_khz(rx_status) != 5657 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5658 rcu_read_unlock(); 5659 return; 5660 } 5661 chan = chanctx_conf->def.chan; 5662 rcu_read_unlock(); 5663 5664 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5665 !WARN_ON(sdata->vif.valid_links) && 5666 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5667 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5668 elems = ieee802_11_parse_elems_full(&parse_params); 5669 if (!elems) 5670 return; 5671 5672 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5673 5674 if (elems->dtim_period) 5675 link->u.mgd.dtim_period = elems->dtim_period; 5676 link->u.mgd.have_beacon = true; 5677 ifmgd->assoc_data->need_beacon = false; 5678 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5679 link->conf->sync_tsf = 5680 le64_to_cpu(mgmt->u.beacon.timestamp); 5681 link->conf->sync_device_ts = 5682 rx_status->device_timestamp; 5683 link->conf->sync_dtim_count = elems->dtim_count; 5684 } 5685 5686 if (elems->mbssid_config_ie) 5687 bss_conf->profile_periodicity = 5688 elems->mbssid_config_ie->profile_periodicity; 5689 else 5690 bss_conf->profile_periodicity = 0; 5691 5692 if (elems->ext_capab_len >= 11 && 5693 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5694 bss_conf->ema_ap = true; 5695 else 5696 bss_conf->ema_ap = false; 5697 5698 /* continue assoc process */ 5699 ifmgd->assoc_data->timeout = jiffies; 5700 ifmgd->assoc_data->timeout_started = true; 5701 run_again(sdata, ifmgd->assoc_data->timeout); 5702 kfree(elems); 5703 return; 5704 } 5705 5706 if (!ifmgd->associated || 5707 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5708 return; 5709 bssid = link->u.mgd.bssid; 5710 5711 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5712 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5713 local, rx_status); 5714 5715 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5716 mlme_dbg_ratelimited(sdata, 5717 "cancelling AP probe due to a received beacon\n"); 5718 ieee80211_reset_ap_probe(sdata); 5719 } 5720 5721 /* 5722 * Push the beacon loss detection into the future since 5723 * we are processing a beacon from the AP just now. 5724 */ 5725 ieee80211_sta_reset_beacon_monitor(sdata); 5726 5727 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5728 * element (which carries the beacon interval). Don't forget to add a 5729 * bit to care_about_ies[] above if mac80211 is interested in a 5730 * changing S1G element. 5731 */ 5732 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5733 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5734 parse_params.bss = link->u.mgd.bss; 5735 parse_params.filter = care_about_ies; 5736 parse_params.crc = ncrc; 5737 elems = ieee802_11_parse_elems_full(&parse_params); 5738 if (!elems) 5739 return; 5740 ncrc = elems->crc; 5741 5742 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5743 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5744 if (local->hw.conf.dynamic_ps_timeout > 0) { 5745 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5746 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5747 ieee80211_hw_config(local, 5748 IEEE80211_CONF_CHANGE_PS); 5749 } 5750 ieee80211_send_nullfunc(local, sdata, false); 5751 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5752 local->pspolling = true; 5753 5754 /* 5755 * Here is assumed that the driver will be 5756 * able to send ps-poll frame and receive a 5757 * response even though power save mode is 5758 * enabled, but some drivers might require 5759 * to disable power save here. This needs 5760 * to be investigated. 5761 */ 5762 ieee80211_send_pspoll(local, sdata); 5763 } 5764 } 5765 5766 if (sdata->vif.p2p || 5767 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5768 struct ieee80211_p2p_noa_attr noa = {}; 5769 int ret; 5770 5771 ret = cfg80211_get_p2p_attr(variable, 5772 len - baselen, 5773 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5774 (u8 *) &noa, sizeof(noa)); 5775 if (ret >= 2) { 5776 if (link->u.mgd.p2p_noa_index != noa.index) { 5777 /* valid noa_attr and index changed */ 5778 link->u.mgd.p2p_noa_index = noa.index; 5779 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5780 changed |= BSS_CHANGED_P2P_PS; 5781 /* 5782 * make sure we update all information, the CRC 5783 * mechanism doesn't look at P2P attributes. 5784 */ 5785 link->u.mgd.beacon_crc_valid = false; 5786 } 5787 } else if (link->u.mgd.p2p_noa_index != -1) { 5788 /* noa_attr not found and we had valid noa_attr before */ 5789 link->u.mgd.p2p_noa_index = -1; 5790 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5791 changed |= BSS_CHANGED_P2P_PS; 5792 link->u.mgd.beacon_crc_valid = false; 5793 } 5794 } 5795 5796 if (link->u.mgd.csa_waiting_bcn) 5797 ieee80211_chswitch_post_beacon(link); 5798 5799 /* 5800 * Update beacon timing and dtim count on every beacon appearance. This 5801 * will allow the driver to use the most updated values. Do it before 5802 * comparing this one with last received beacon. 5803 * IMPORTANT: These parameters would possibly be out of sync by the time 5804 * the driver will use them. The synchronized view is currently 5805 * guaranteed only in certain callbacks. 5806 */ 5807 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5808 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5809 link->conf->sync_tsf = 5810 le64_to_cpu(mgmt->u.beacon.timestamp); 5811 link->conf->sync_device_ts = 5812 rx_status->device_timestamp; 5813 link->conf->sync_dtim_count = elems->dtim_count; 5814 } 5815 5816 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5817 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5818 goto free; 5819 link->u.mgd.beacon_crc = ncrc; 5820 link->u.mgd.beacon_crc_valid = true; 5821 5822 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5823 5824 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5825 rx_status->device_timestamp, 5826 elems, true); 5827 5828 if (!link->u.mgd.disable_wmm_tracking && 5829 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5830 elems->wmm_param_len, 5831 elems->mu_edca_param_set)) 5832 changed |= BSS_CHANGED_QOS; 5833 5834 /* 5835 * If we haven't had a beacon before, tell the driver about the 5836 * DTIM period (and beacon timing if desired) now. 5837 */ 5838 if (!link->u.mgd.have_beacon) { 5839 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5840 bss_conf->dtim_period = elems->dtim_period ?: 1; 5841 5842 changed |= BSS_CHANGED_BEACON_INFO; 5843 link->u.mgd.have_beacon = true; 5844 5845 mutex_lock(&local->iflist_mtx); 5846 ieee80211_recalc_ps(local); 5847 mutex_unlock(&local->iflist_mtx); 5848 5849 ieee80211_recalc_ps_vif(sdata); 5850 } 5851 5852 if (elems->erp_info) { 5853 erp_valid = true; 5854 erp_value = elems->erp_info[0]; 5855 } else { 5856 erp_valid = false; 5857 } 5858 5859 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5860 changed |= ieee80211_handle_bss_capability(link, 5861 le16_to_cpu(mgmt->u.beacon.capab_info), 5862 erp_valid, erp_value); 5863 5864 mutex_lock(&local->sta_mtx); 5865 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5866 if (WARN_ON(!sta)) { 5867 mutex_unlock(&local->sta_mtx); 5868 goto free; 5869 } 5870 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5871 lockdep_is_held(&local->sta_mtx)); 5872 if (WARN_ON(!link_sta)) { 5873 mutex_unlock(&local->sta_mtx); 5874 goto free; 5875 } 5876 5877 if (WARN_ON(!link->conf->chandef.chan)) 5878 goto free; 5879 5880 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5881 5882 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5883 5884 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5885 elems->vht_cap_elem, elems->ht_operation, 5886 elems->vht_operation, elems->he_operation, 5887 elems->eht_operation, 5888 elems->s1g_oper, bssid, &changed)) { 5889 mutex_unlock(&local->sta_mtx); 5890 sdata_info(sdata, 5891 "failed to follow AP %pM bandwidth change, disconnect\n", 5892 bssid); 5893 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5894 WLAN_REASON_DEAUTH_LEAVING, 5895 true, deauth_buf); 5896 ieee80211_report_disconnect(sdata, deauth_buf, 5897 sizeof(deauth_buf), true, 5898 WLAN_REASON_DEAUTH_LEAVING, 5899 false); 5900 goto free; 5901 } 5902 5903 if (elems->opmode_notif) 5904 ieee80211_vht_handle_opmode(sdata, link_sta, 5905 *elems->opmode_notif, 5906 rx_status->band); 5907 mutex_unlock(&local->sta_mtx); 5908 5909 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5910 elems->country_elem, 5911 elems->country_elem_len, 5912 elems->pwr_constr_elem, 5913 elems->cisco_dtpc_elem); 5914 5915 if (elems->eht_operation && 5916 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 5917 if (!ieee80211_config_puncturing(link, elems->eht_operation, 5918 &changed)) { 5919 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5920 WLAN_REASON_DEAUTH_LEAVING, 5921 true, deauth_buf); 5922 ieee80211_report_disconnect(sdata, deauth_buf, 5923 sizeof(deauth_buf), true, 5924 WLAN_REASON_DEAUTH_LEAVING, 5925 false); 5926 goto free; 5927 } 5928 } 5929 5930 ieee80211_link_info_change_notify(sdata, link, changed); 5931 free: 5932 kfree(elems); 5933 } 5934 5935 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5936 struct sk_buff *skb) 5937 { 5938 struct ieee80211_link_data *link = &sdata->deflink; 5939 struct ieee80211_rx_status *rx_status; 5940 struct ieee80211_hdr *hdr; 5941 u16 fc; 5942 5943 rx_status = (struct ieee80211_rx_status *) skb->cb; 5944 hdr = (struct ieee80211_hdr *) skb->data; 5945 fc = le16_to_cpu(hdr->frame_control); 5946 5947 sdata_lock(sdata); 5948 switch (fc & IEEE80211_FCTL_STYPE) { 5949 case IEEE80211_STYPE_S1G_BEACON: 5950 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5951 break; 5952 } 5953 sdata_unlock(sdata); 5954 } 5955 5956 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5957 struct sk_buff *skb) 5958 { 5959 struct ieee80211_link_data *link = &sdata->deflink; 5960 struct ieee80211_rx_status *rx_status; 5961 struct ieee80211_mgmt *mgmt; 5962 u16 fc; 5963 int ies_len; 5964 5965 rx_status = (struct ieee80211_rx_status *) skb->cb; 5966 mgmt = (struct ieee80211_mgmt *) skb->data; 5967 fc = le16_to_cpu(mgmt->frame_control); 5968 5969 sdata_lock(sdata); 5970 5971 if (rx_status->link_valid) { 5972 link = sdata_dereference(sdata->link[rx_status->link_id], 5973 sdata); 5974 if (!link) 5975 goto out; 5976 } 5977 5978 switch (fc & IEEE80211_FCTL_STYPE) { 5979 case IEEE80211_STYPE_BEACON: 5980 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5981 skb->len, rx_status); 5982 break; 5983 case IEEE80211_STYPE_PROBE_RESP: 5984 ieee80211_rx_mgmt_probe_resp(link, skb); 5985 break; 5986 case IEEE80211_STYPE_AUTH: 5987 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5988 break; 5989 case IEEE80211_STYPE_DEAUTH: 5990 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5991 break; 5992 case IEEE80211_STYPE_DISASSOC: 5993 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5994 break; 5995 case IEEE80211_STYPE_ASSOC_RESP: 5996 case IEEE80211_STYPE_REASSOC_RESP: 5997 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5998 break; 5999 case IEEE80211_STYPE_ACTION: 6000 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6001 struct ieee802_11_elems *elems; 6002 6003 ies_len = skb->len - 6004 offsetof(struct ieee80211_mgmt, 6005 u.action.u.chan_switch.variable); 6006 6007 if (ies_len < 0) 6008 break; 6009 6010 /* CSA IE cannot be overridden, no need for BSSID */ 6011 elems = ieee802_11_parse_elems( 6012 mgmt->u.action.u.chan_switch.variable, 6013 ies_len, true, NULL); 6014 6015 if (elems && !elems->parse_error) 6016 ieee80211_sta_process_chanswitch(link, 6017 rx_status->mactime, 6018 rx_status->device_timestamp, 6019 elems, false); 6020 kfree(elems); 6021 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6022 struct ieee802_11_elems *elems; 6023 6024 ies_len = skb->len - 6025 offsetof(struct ieee80211_mgmt, 6026 u.action.u.ext_chan_switch.variable); 6027 6028 if (ies_len < 0) 6029 break; 6030 6031 /* 6032 * extended CSA IE can't be overridden, no need for 6033 * BSSID 6034 */ 6035 elems = ieee802_11_parse_elems( 6036 mgmt->u.action.u.ext_chan_switch.variable, 6037 ies_len, true, NULL); 6038 6039 if (elems && !elems->parse_error) { 6040 /* for the handling code pretend it was an IE */ 6041 elems->ext_chansw_ie = 6042 &mgmt->u.action.u.ext_chan_switch.data; 6043 6044 ieee80211_sta_process_chanswitch(link, 6045 rx_status->mactime, 6046 rx_status->device_timestamp, 6047 elems, false); 6048 } 6049 6050 kfree(elems); 6051 } 6052 break; 6053 } 6054 out: 6055 sdata_unlock(sdata); 6056 } 6057 6058 static void ieee80211_sta_timer(struct timer_list *t) 6059 { 6060 struct ieee80211_sub_if_data *sdata = 6061 from_timer(sdata, t, u.mgd.timer); 6062 6063 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 6064 } 6065 6066 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6067 u8 reason, bool tx) 6068 { 6069 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6070 6071 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6072 tx, frame_buf); 6073 6074 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6075 reason, false); 6076 } 6077 6078 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6079 { 6080 struct ieee80211_local *local = sdata->local; 6081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6082 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6083 u32 tx_flags = 0; 6084 u16 trans = 1; 6085 u16 status = 0; 6086 struct ieee80211_prep_tx_info info = { 6087 .subtype = IEEE80211_STYPE_AUTH, 6088 }; 6089 6090 sdata_assert_lock(sdata); 6091 6092 if (WARN_ON_ONCE(!auth_data)) 6093 return -EINVAL; 6094 6095 auth_data->tries++; 6096 6097 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6098 sdata_info(sdata, "authentication with %pM timed out\n", 6099 auth_data->ap_addr); 6100 6101 /* 6102 * Most likely AP is not in the range so remove the 6103 * bss struct for that AP. 6104 */ 6105 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6106 6107 return -ETIMEDOUT; 6108 } 6109 6110 if (auth_data->algorithm == WLAN_AUTH_SAE) 6111 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6112 6113 drv_mgd_prepare_tx(local, sdata, &info); 6114 6115 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6116 auth_data->ap_addr, auth_data->tries, 6117 IEEE80211_AUTH_MAX_TRIES); 6118 6119 auth_data->expected_transaction = 2; 6120 6121 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6122 trans = auth_data->sae_trans; 6123 status = auth_data->sae_status; 6124 auth_data->expected_transaction = trans; 6125 } 6126 6127 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6128 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6129 IEEE80211_TX_INTFL_MLME_CONN_TX; 6130 6131 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6132 auth_data->data, auth_data->data_len, 6133 auth_data->ap_addr, auth_data->ap_addr, 6134 NULL, 0, 0, tx_flags); 6135 6136 if (tx_flags == 0) { 6137 if (auth_data->algorithm == WLAN_AUTH_SAE) 6138 auth_data->timeout = jiffies + 6139 IEEE80211_AUTH_TIMEOUT_SAE; 6140 else 6141 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6142 } else { 6143 auth_data->timeout = 6144 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6145 } 6146 6147 auth_data->timeout_started = true; 6148 run_again(sdata, auth_data->timeout); 6149 6150 return 0; 6151 } 6152 6153 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6154 { 6155 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6156 struct ieee80211_local *local = sdata->local; 6157 int ret; 6158 6159 sdata_assert_lock(sdata); 6160 6161 assoc_data->tries++; 6162 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6163 sdata_info(sdata, "association with %pM timed out\n", 6164 assoc_data->ap_addr); 6165 6166 /* 6167 * Most likely AP is not in the range so remove the 6168 * bss struct for that AP. 6169 */ 6170 cfg80211_unlink_bss(local->hw.wiphy, 6171 assoc_data->link[assoc_data->assoc_link_id].bss); 6172 6173 return -ETIMEDOUT; 6174 } 6175 6176 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6177 assoc_data->ap_addr, assoc_data->tries, 6178 IEEE80211_ASSOC_MAX_TRIES); 6179 ret = ieee80211_send_assoc(sdata); 6180 if (ret) 6181 return ret; 6182 6183 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6184 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6185 assoc_data->timeout_started = true; 6186 run_again(sdata, assoc_data->timeout); 6187 } else { 6188 assoc_data->timeout = 6189 round_jiffies_up(jiffies + 6190 IEEE80211_ASSOC_TIMEOUT_LONG); 6191 assoc_data->timeout_started = true; 6192 run_again(sdata, assoc_data->timeout); 6193 } 6194 6195 return 0; 6196 } 6197 6198 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6199 __le16 fc, bool acked) 6200 { 6201 struct ieee80211_local *local = sdata->local; 6202 6203 sdata->u.mgd.status_fc = fc; 6204 sdata->u.mgd.status_acked = acked; 6205 sdata->u.mgd.status_received = true; 6206 6207 ieee80211_queue_work(&local->hw, &sdata->work); 6208 } 6209 6210 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6211 { 6212 struct ieee80211_local *local = sdata->local; 6213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6214 6215 sdata_lock(sdata); 6216 6217 if (ifmgd->status_received) { 6218 __le16 fc = ifmgd->status_fc; 6219 bool status_acked = ifmgd->status_acked; 6220 6221 ifmgd->status_received = false; 6222 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6223 if (status_acked) { 6224 if (ifmgd->auth_data->algorithm == 6225 WLAN_AUTH_SAE) 6226 ifmgd->auth_data->timeout = 6227 jiffies + 6228 IEEE80211_AUTH_TIMEOUT_SAE; 6229 else 6230 ifmgd->auth_data->timeout = 6231 jiffies + 6232 IEEE80211_AUTH_TIMEOUT_SHORT; 6233 run_again(sdata, ifmgd->auth_data->timeout); 6234 } else { 6235 ifmgd->auth_data->timeout = jiffies - 1; 6236 } 6237 ifmgd->auth_data->timeout_started = true; 6238 } else if (ifmgd->assoc_data && 6239 (ieee80211_is_assoc_req(fc) || 6240 ieee80211_is_reassoc_req(fc))) { 6241 if (status_acked) { 6242 ifmgd->assoc_data->timeout = 6243 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6244 run_again(sdata, ifmgd->assoc_data->timeout); 6245 } else { 6246 ifmgd->assoc_data->timeout = jiffies - 1; 6247 } 6248 ifmgd->assoc_data->timeout_started = true; 6249 } 6250 } 6251 6252 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6253 time_after(jiffies, ifmgd->auth_data->timeout)) { 6254 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6255 /* 6256 * ok ... we waited for assoc or continuation but 6257 * userspace didn't do it, so kill the auth data 6258 */ 6259 ieee80211_destroy_auth_data(sdata, false); 6260 } else if (ieee80211_auth(sdata)) { 6261 u8 ap_addr[ETH_ALEN]; 6262 struct ieee80211_event event = { 6263 .type = MLME_EVENT, 6264 .u.mlme.data = AUTH_EVENT, 6265 .u.mlme.status = MLME_TIMEOUT, 6266 }; 6267 6268 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6269 6270 ieee80211_destroy_auth_data(sdata, false); 6271 6272 cfg80211_auth_timeout(sdata->dev, ap_addr); 6273 drv_event_callback(sdata->local, sdata, &event); 6274 } 6275 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6276 run_again(sdata, ifmgd->auth_data->timeout); 6277 6278 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6279 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6280 if ((ifmgd->assoc_data->need_beacon && 6281 !sdata->deflink.u.mgd.have_beacon) || 6282 ieee80211_do_assoc(sdata)) { 6283 struct ieee80211_event event = { 6284 .type = MLME_EVENT, 6285 .u.mlme.data = ASSOC_EVENT, 6286 .u.mlme.status = MLME_TIMEOUT, 6287 }; 6288 6289 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6290 drv_event_callback(sdata->local, sdata, &event); 6291 } 6292 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6293 run_again(sdata, ifmgd->assoc_data->timeout); 6294 6295 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6296 ifmgd->associated) { 6297 u8 *bssid = sdata->deflink.u.mgd.bssid; 6298 int max_tries; 6299 6300 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6301 max_tries = max_nullfunc_tries; 6302 else 6303 max_tries = max_probe_tries; 6304 6305 /* ACK received for nullfunc probing frame */ 6306 if (!ifmgd->probe_send_count) 6307 ieee80211_reset_ap_probe(sdata); 6308 else if (ifmgd->nullfunc_failed) { 6309 if (ifmgd->probe_send_count < max_tries) { 6310 mlme_dbg(sdata, 6311 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6312 bssid, ifmgd->probe_send_count, 6313 max_tries); 6314 ieee80211_mgd_probe_ap_send(sdata); 6315 } else { 6316 mlme_dbg(sdata, 6317 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6318 bssid); 6319 ieee80211_sta_connection_lost(sdata, 6320 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6321 false); 6322 } 6323 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6324 run_again(sdata, ifmgd->probe_timeout); 6325 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6326 mlme_dbg(sdata, 6327 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6328 bssid, probe_wait_ms); 6329 ieee80211_sta_connection_lost(sdata, 6330 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6331 } else if (ifmgd->probe_send_count < max_tries) { 6332 mlme_dbg(sdata, 6333 "No probe response from AP %pM after %dms, try %d/%i\n", 6334 bssid, probe_wait_ms, 6335 ifmgd->probe_send_count, max_tries); 6336 ieee80211_mgd_probe_ap_send(sdata); 6337 } else { 6338 /* 6339 * We actually lost the connection ... or did we? 6340 * Let's make sure! 6341 */ 6342 mlme_dbg(sdata, 6343 "No probe response from AP %pM after %dms, disconnecting.\n", 6344 bssid, probe_wait_ms); 6345 6346 ieee80211_sta_connection_lost(sdata, 6347 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6348 } 6349 } 6350 6351 sdata_unlock(sdata); 6352 } 6353 6354 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6355 { 6356 struct ieee80211_sub_if_data *sdata = 6357 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6358 6359 if (WARN_ON(sdata->vif.valid_links)) 6360 return; 6361 6362 if (sdata->vif.bss_conf.csa_active && 6363 !sdata->deflink.u.mgd.csa_waiting_bcn) 6364 return; 6365 6366 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6367 return; 6368 6369 sdata->u.mgd.connection_loss = false; 6370 ieee80211_queue_work(&sdata->local->hw, 6371 &sdata->u.mgd.beacon_connection_loss_work); 6372 } 6373 6374 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6375 { 6376 struct ieee80211_sub_if_data *sdata = 6377 from_timer(sdata, t, u.mgd.conn_mon_timer); 6378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6379 struct ieee80211_local *local = sdata->local; 6380 struct sta_info *sta; 6381 unsigned long timeout; 6382 6383 if (WARN_ON(sdata->vif.valid_links)) 6384 return; 6385 6386 if (sdata->vif.bss_conf.csa_active && 6387 !sdata->deflink.u.mgd.csa_waiting_bcn) 6388 return; 6389 6390 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6391 if (!sta) 6392 return; 6393 6394 timeout = sta->deflink.status_stats.last_ack; 6395 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6396 timeout = sta->deflink.rx_stats.last_rx; 6397 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6398 6399 /* If timeout is after now, then update timer to fire at 6400 * the later date, but do not actually probe at this time. 6401 */ 6402 if (time_is_after_jiffies(timeout)) { 6403 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6404 return; 6405 } 6406 6407 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6408 } 6409 6410 static void ieee80211_sta_monitor_work(struct work_struct *work) 6411 { 6412 struct ieee80211_sub_if_data *sdata = 6413 container_of(work, struct ieee80211_sub_if_data, 6414 u.mgd.monitor_work); 6415 6416 ieee80211_mgd_probe_ap(sdata, false); 6417 } 6418 6419 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6420 { 6421 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6422 __ieee80211_stop_poll(sdata); 6423 6424 /* let's probe the connection once */ 6425 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6426 ieee80211_queue_work(&sdata->local->hw, 6427 &sdata->u.mgd.monitor_work); 6428 } 6429 } 6430 6431 #ifdef CONFIG_PM 6432 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6433 { 6434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6435 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6436 6437 sdata_lock(sdata); 6438 6439 if (ifmgd->auth_data || ifmgd->assoc_data) { 6440 const u8 *ap_addr = ifmgd->auth_data ? 6441 ifmgd->auth_data->ap_addr : 6442 ifmgd->assoc_data->ap_addr; 6443 6444 /* 6445 * If we are trying to authenticate / associate while suspending, 6446 * cfg80211 won't know and won't actually abort those attempts, 6447 * thus we need to do that ourselves. 6448 */ 6449 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6450 IEEE80211_STYPE_DEAUTH, 6451 WLAN_REASON_DEAUTH_LEAVING, 6452 false, frame_buf); 6453 if (ifmgd->assoc_data) 6454 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6455 if (ifmgd->auth_data) 6456 ieee80211_destroy_auth_data(sdata, false); 6457 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6458 IEEE80211_DEAUTH_FRAME_LEN, 6459 false); 6460 } 6461 6462 /* This is a bit of a hack - we should find a better and more generic 6463 * solution to this. Normally when suspending, cfg80211 will in fact 6464 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6465 * auth (not so important) or assoc (this is the problem) process. 6466 * 6467 * As a consequence, it can happen that we are in the process of both 6468 * associating and suspending, and receive an association response 6469 * after cfg80211 has checked if it needs to disconnect, but before 6470 * we actually set the flag to drop incoming frames. This will then 6471 * cause the workqueue flush to process the association response in 6472 * the suspend, resulting in a successful association just before it 6473 * tries to remove the interface from the driver, which now though 6474 * has a channel context assigned ... this results in issues. 6475 * 6476 * To work around this (for now) simply deauth here again if we're 6477 * now connected. 6478 */ 6479 if (ifmgd->associated && !sdata->local->wowlan) { 6480 u8 bssid[ETH_ALEN]; 6481 struct cfg80211_deauth_request req = { 6482 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6483 .bssid = bssid, 6484 }; 6485 6486 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6487 ieee80211_mgd_deauth(sdata, &req); 6488 } 6489 6490 sdata_unlock(sdata); 6491 } 6492 #endif 6493 6494 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6495 { 6496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6497 6498 sdata_lock(sdata); 6499 if (!ifmgd->associated) { 6500 sdata_unlock(sdata); 6501 return; 6502 } 6503 6504 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6505 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6506 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6507 ieee80211_sta_connection_lost(sdata, 6508 WLAN_REASON_UNSPECIFIED, 6509 true); 6510 sdata_unlock(sdata); 6511 return; 6512 } 6513 6514 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6515 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6516 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6517 ieee80211_sta_connection_lost(sdata, 6518 WLAN_REASON_UNSPECIFIED, 6519 true); 6520 sdata_unlock(sdata); 6521 return; 6522 } 6523 6524 sdata_unlock(sdata); 6525 } 6526 6527 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6528 { 6529 struct ieee80211_link_data *link = 6530 container_of(work, struct ieee80211_link_data, 6531 u.mgd.request_smps_work); 6532 6533 sdata_lock(link->sdata); 6534 __ieee80211_request_smps_mgd(link->sdata, link, 6535 link->u.mgd.driver_smps_mode); 6536 sdata_unlock(link->sdata); 6537 } 6538 6539 /* interface setup */ 6540 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6541 { 6542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6543 6544 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6545 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6546 ieee80211_beacon_connection_loss_work); 6547 INIT_WORK(&ifmgd->csa_connection_drop_work, 6548 ieee80211_csa_connection_drop_work); 6549 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6550 ieee80211_tdls_peer_del_work); 6551 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6552 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6553 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6554 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6555 ieee80211_sta_handle_tspec_ac_params_wk); 6556 6557 ifmgd->flags = 0; 6558 ifmgd->powersave = sdata->wdev.ps; 6559 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6560 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6561 /* Setup TDLS data */ 6562 spin_lock_init(&ifmgd->teardown_lock); 6563 ifmgd->teardown_skb = NULL; 6564 ifmgd->orig_teardown_skb = NULL; 6565 } 6566 6567 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6568 { 6569 struct ieee80211_sub_if_data *sdata = link->sdata; 6570 struct ieee80211_local *local = sdata->local; 6571 unsigned int link_id = link->link_id; 6572 6573 link->u.mgd.p2p_noa_index = -1; 6574 link->u.mgd.conn_flags = 0; 6575 link->conf->bssid = link->u.mgd.bssid; 6576 6577 INIT_WORK(&link->u.mgd.request_smps_work, 6578 ieee80211_request_smps_mgd_work); 6579 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6580 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6581 else 6582 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6583 6584 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6585 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6586 6587 if (sdata->u.mgd.assoc_data) 6588 ether_addr_copy(link->conf->addr, 6589 sdata->u.mgd.assoc_data->link[link_id].addr); 6590 else if (!is_valid_ether_addr(link->conf->addr)) 6591 eth_random_addr(link->conf->addr); 6592 } 6593 6594 /* scan finished notification */ 6595 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6596 { 6597 struct ieee80211_sub_if_data *sdata; 6598 6599 /* Restart STA timers */ 6600 rcu_read_lock(); 6601 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6602 if (ieee80211_sdata_running(sdata)) 6603 ieee80211_restart_sta_timer(sdata); 6604 } 6605 rcu_read_unlock(); 6606 } 6607 6608 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6609 struct cfg80211_bss *cbss, s8 link_id, 6610 const u8 *ap_mld_addr, bool assoc, 6611 bool override) 6612 { 6613 struct ieee80211_local *local = sdata->local; 6614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6615 struct ieee80211_bss *bss = (void *)cbss->priv; 6616 struct sta_info *new_sta = NULL; 6617 struct ieee80211_link_data *link; 6618 bool have_sta = false; 6619 bool mlo; 6620 int err; 6621 6622 if (link_id >= 0) { 6623 mlo = true; 6624 if (WARN_ON(!ap_mld_addr)) 6625 return -EINVAL; 6626 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6627 } else { 6628 if (WARN_ON(ap_mld_addr)) 6629 return -EINVAL; 6630 ap_mld_addr = cbss->bssid; 6631 err = ieee80211_vif_set_links(sdata, 0); 6632 link_id = 0; 6633 mlo = false; 6634 } 6635 6636 if (err) 6637 return err; 6638 6639 link = sdata_dereference(sdata->link[link_id], sdata); 6640 if (WARN_ON(!link)) { 6641 err = -ENOLINK; 6642 goto out_err; 6643 } 6644 6645 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6646 err = -EINVAL; 6647 goto out_err; 6648 } 6649 6650 /* If a reconfig is happening, bail out */ 6651 if (local->in_reconfig) { 6652 err = -EBUSY; 6653 goto out_err; 6654 } 6655 6656 if (assoc) { 6657 rcu_read_lock(); 6658 have_sta = sta_info_get(sdata, ap_mld_addr); 6659 rcu_read_unlock(); 6660 } 6661 6662 if (!have_sta) { 6663 if (mlo) 6664 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6665 link_id, cbss->bssid, 6666 GFP_KERNEL); 6667 else 6668 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6669 6670 if (!new_sta) { 6671 err = -ENOMEM; 6672 goto out_err; 6673 } 6674 6675 new_sta->sta.mlo = mlo; 6676 } 6677 6678 /* 6679 * Set up the information for the new channel before setting the 6680 * new channel. We can't - completely race-free - change the basic 6681 * rates bitmap and the channel (sband) that it refers to, but if 6682 * we set it up before we at least avoid calling into the driver's 6683 * bss_info_changed() method with invalid information (since we do 6684 * call that from changing the channel - only for IDLE and perhaps 6685 * some others, but ...). 6686 * 6687 * So to avoid that, just set up all the new information before the 6688 * channel, but tell the driver to apply it only afterwards, since 6689 * it might need the new channel for that. 6690 */ 6691 if (new_sta) { 6692 const struct cfg80211_bss_ies *ies; 6693 struct link_sta_info *link_sta; 6694 6695 rcu_read_lock(); 6696 link_sta = rcu_dereference(new_sta->link[link_id]); 6697 if (WARN_ON(!link_sta)) { 6698 rcu_read_unlock(); 6699 sta_info_free(local, new_sta); 6700 err = -EINVAL; 6701 goto out_err; 6702 } 6703 6704 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6705 link_sta, cbss); 6706 if (err) { 6707 rcu_read_unlock(); 6708 sta_info_free(local, new_sta); 6709 goto out_err; 6710 } 6711 6712 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6713 6714 /* set timing information */ 6715 link->conf->beacon_int = cbss->beacon_interval; 6716 ies = rcu_dereference(cbss->beacon_ies); 6717 if (ies) { 6718 link->conf->sync_tsf = ies->tsf; 6719 link->conf->sync_device_ts = 6720 bss->device_ts_beacon; 6721 6722 ieee80211_get_dtim(ies, 6723 &link->conf->sync_dtim_count, 6724 NULL); 6725 } else if (!ieee80211_hw_check(&sdata->local->hw, 6726 TIMING_BEACON_ONLY)) { 6727 ies = rcu_dereference(cbss->proberesp_ies); 6728 /* must be non-NULL since beacon IEs were NULL */ 6729 link->conf->sync_tsf = ies->tsf; 6730 link->conf->sync_device_ts = 6731 bss->device_ts_presp; 6732 link->conf->sync_dtim_count = 0; 6733 } else { 6734 link->conf->sync_tsf = 0; 6735 link->conf->sync_device_ts = 0; 6736 link->conf->sync_dtim_count = 0; 6737 } 6738 rcu_read_unlock(); 6739 } 6740 6741 if (new_sta || override) { 6742 err = ieee80211_prep_channel(sdata, link, cbss, 6743 &link->u.mgd.conn_flags); 6744 if (err) { 6745 if (new_sta) 6746 sta_info_free(local, new_sta); 6747 goto out_err; 6748 } 6749 } 6750 6751 if (new_sta) { 6752 /* 6753 * tell driver about BSSID, basic rates and timing 6754 * this was set up above, before setting the channel 6755 */ 6756 ieee80211_link_info_change_notify(sdata, link, 6757 BSS_CHANGED_BSSID | 6758 BSS_CHANGED_BASIC_RATES | 6759 BSS_CHANGED_BEACON_INT); 6760 6761 if (assoc) 6762 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6763 6764 err = sta_info_insert(new_sta); 6765 new_sta = NULL; 6766 if (err) { 6767 sdata_info(sdata, 6768 "failed to insert STA entry for the AP (error %d)\n", 6769 err); 6770 goto out_err; 6771 } 6772 } else 6773 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6774 6775 /* Cancel scan to ensure that nothing interferes with connection */ 6776 if (local->scanning) 6777 ieee80211_scan_cancel(local); 6778 6779 return 0; 6780 6781 out_err: 6782 ieee80211_link_release_channel(&sdata->deflink); 6783 ieee80211_vif_set_links(sdata, 0); 6784 return err; 6785 } 6786 6787 /* config hooks */ 6788 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6789 struct cfg80211_auth_request *req) 6790 { 6791 struct ieee80211_local *local = sdata->local; 6792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6793 struct ieee80211_mgd_auth_data *auth_data; 6794 u16 auth_alg; 6795 int err; 6796 bool cont_auth; 6797 6798 /* prepare auth data structure */ 6799 6800 switch (req->auth_type) { 6801 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6802 auth_alg = WLAN_AUTH_OPEN; 6803 break; 6804 case NL80211_AUTHTYPE_SHARED_KEY: 6805 if (fips_enabled) 6806 return -EOPNOTSUPP; 6807 auth_alg = WLAN_AUTH_SHARED_KEY; 6808 break; 6809 case NL80211_AUTHTYPE_FT: 6810 auth_alg = WLAN_AUTH_FT; 6811 break; 6812 case NL80211_AUTHTYPE_NETWORK_EAP: 6813 auth_alg = WLAN_AUTH_LEAP; 6814 break; 6815 case NL80211_AUTHTYPE_SAE: 6816 auth_alg = WLAN_AUTH_SAE; 6817 break; 6818 case NL80211_AUTHTYPE_FILS_SK: 6819 auth_alg = WLAN_AUTH_FILS_SK; 6820 break; 6821 case NL80211_AUTHTYPE_FILS_SK_PFS: 6822 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6823 break; 6824 case NL80211_AUTHTYPE_FILS_PK: 6825 auth_alg = WLAN_AUTH_FILS_PK; 6826 break; 6827 default: 6828 return -EOPNOTSUPP; 6829 } 6830 6831 if (ifmgd->assoc_data) 6832 return -EBUSY; 6833 6834 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6835 req->ie_len, GFP_KERNEL); 6836 if (!auth_data) 6837 return -ENOMEM; 6838 6839 memcpy(auth_data->ap_addr, 6840 req->ap_mld_addr ?: req->bss->bssid, 6841 ETH_ALEN); 6842 auth_data->bss = req->bss; 6843 auth_data->link_id = req->link_id; 6844 6845 if (req->auth_data_len >= 4) { 6846 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6847 __le16 *pos = (__le16 *) req->auth_data; 6848 6849 auth_data->sae_trans = le16_to_cpu(pos[0]); 6850 auth_data->sae_status = le16_to_cpu(pos[1]); 6851 } 6852 memcpy(auth_data->data, req->auth_data + 4, 6853 req->auth_data_len - 4); 6854 auth_data->data_len += req->auth_data_len - 4; 6855 } 6856 6857 /* Check if continuing authentication or trying to authenticate with the 6858 * same BSS that we were in the process of authenticating with and avoid 6859 * removal and re-addition of the STA entry in 6860 * ieee80211_prep_connection(). 6861 */ 6862 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6863 ifmgd->auth_data->link_id == req->link_id; 6864 6865 if (req->ie && req->ie_len) { 6866 memcpy(&auth_data->data[auth_data->data_len], 6867 req->ie, req->ie_len); 6868 auth_data->data_len += req->ie_len; 6869 } 6870 6871 if (req->key && req->key_len) { 6872 auth_data->key_len = req->key_len; 6873 auth_data->key_idx = req->key_idx; 6874 memcpy(auth_data->key, req->key, req->key_len); 6875 } 6876 6877 auth_data->algorithm = auth_alg; 6878 6879 /* try to authenticate/probe */ 6880 6881 if (ifmgd->auth_data) { 6882 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6883 auth_data->peer_confirmed = 6884 ifmgd->auth_data->peer_confirmed; 6885 } 6886 ieee80211_destroy_auth_data(sdata, cont_auth); 6887 } 6888 6889 /* prep auth_data so we don't go into idle on disassoc */ 6890 ifmgd->auth_data = auth_data; 6891 6892 /* If this is continuation of an ongoing SAE authentication exchange 6893 * (i.e., request to send SAE Confirm) and the peer has already 6894 * confirmed, mark authentication completed since we are about to send 6895 * out SAE Confirm. 6896 */ 6897 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6898 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6899 ieee80211_mark_sta_auth(sdata); 6900 6901 if (ifmgd->associated) { 6902 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6903 6904 sdata_info(sdata, 6905 "disconnect from AP %pM for new auth to %pM\n", 6906 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6907 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6908 WLAN_REASON_UNSPECIFIED, 6909 false, frame_buf); 6910 6911 ieee80211_report_disconnect(sdata, frame_buf, 6912 sizeof(frame_buf), true, 6913 WLAN_REASON_UNSPECIFIED, 6914 false); 6915 } 6916 6917 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6918 6919 /* needed for transmitting the auth frame(s) properly */ 6920 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6921 6922 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6923 req->ap_mld_addr, cont_auth, false); 6924 if (err) 6925 goto err_clear; 6926 6927 err = ieee80211_auth(sdata); 6928 if (err) { 6929 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6930 goto err_clear; 6931 } 6932 6933 /* hold our own reference */ 6934 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6935 return 0; 6936 6937 err_clear: 6938 if (!sdata->vif.valid_links) { 6939 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6940 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6941 BSS_CHANGED_BSSID); 6942 mutex_lock(&sdata->local->mtx); 6943 ieee80211_link_release_channel(&sdata->deflink); 6944 mutex_unlock(&sdata->local->mtx); 6945 } 6946 ifmgd->auth_data = NULL; 6947 kfree(auth_data); 6948 return err; 6949 } 6950 6951 static ieee80211_conn_flags_t 6952 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6953 struct ieee80211_mgd_assoc_data *assoc_data, 6954 struct cfg80211_assoc_request *req, 6955 ieee80211_conn_flags_t conn_flags, 6956 unsigned int link_id) 6957 { 6958 struct ieee80211_local *local = sdata->local; 6959 const struct cfg80211_bss_ies *beacon_ies; 6960 struct ieee80211_supported_band *sband; 6961 const struct element *ht_elem, *vht_elem; 6962 struct ieee80211_link_data *link; 6963 struct cfg80211_bss *cbss; 6964 struct ieee80211_bss *bss; 6965 bool is_5ghz, is_6ghz; 6966 6967 cbss = assoc_data->link[link_id].bss; 6968 if (WARN_ON(!cbss)) 6969 return 0; 6970 6971 bss = (void *)cbss->priv; 6972 6973 sband = local->hw.wiphy->bands[cbss->channel->band]; 6974 if (WARN_ON(!sband)) 6975 return 0; 6976 6977 link = sdata_dereference(sdata->link[link_id], sdata); 6978 if (WARN_ON(!link)) 6979 return 0; 6980 6981 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6982 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6983 6984 /* for MLO connections assume advertising all rates is OK */ 6985 if (!req->ap_mld_addr) { 6986 assoc_data->supp_rates = bss->supp_rates; 6987 assoc_data->supp_rates_len = bss->supp_rates_len; 6988 } 6989 6990 /* copy and link elems for the STA profile */ 6991 if (req->links[link_id].elems_len) { 6992 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6993 req->links[link_id].elems_len); 6994 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6995 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6996 assoc_data->ie_pos += req->links[link_id].elems_len; 6997 } 6998 6999 rcu_read_lock(); 7000 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7001 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7002 assoc_data->link[link_id].ap_ht_param = 7003 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7004 else if (!is_6ghz) 7005 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7006 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7007 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7008 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7009 sizeof(struct ieee80211_vht_cap)); 7010 } else if (is_5ghz) { 7011 link_info(link, 7012 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7013 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7014 IEEE80211_CONN_DISABLE_HE | 7015 IEEE80211_CONN_DISABLE_EHT; 7016 } 7017 rcu_read_unlock(); 7018 7019 link->u.mgd.beacon_crc_valid = false; 7020 link->u.mgd.dtim_period = 0; 7021 link->u.mgd.have_beacon = false; 7022 7023 /* override HT/VHT configuration only if the AP and we support it */ 7024 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7025 struct ieee80211_sta_ht_cap sta_ht_cap; 7026 7027 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7028 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7029 } 7030 7031 link->conf->eht_puncturing = 0; 7032 7033 rcu_read_lock(); 7034 beacon_ies = rcu_dereference(cbss->beacon_ies); 7035 if (beacon_ies) { 7036 const struct ieee80211_eht_operation *eht_oper; 7037 const struct element *elem; 7038 u8 dtim_count = 0; 7039 7040 ieee80211_get_dtim(beacon_ies, &dtim_count, 7041 &link->u.mgd.dtim_period); 7042 7043 sdata->deflink.u.mgd.have_beacon = true; 7044 7045 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7046 link->conf->sync_tsf = beacon_ies->tsf; 7047 link->conf->sync_device_ts = bss->device_ts_beacon; 7048 link->conf->sync_dtim_count = dtim_count; 7049 } 7050 7051 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7052 beacon_ies->data, beacon_ies->len); 7053 if (elem && elem->datalen >= 3) 7054 link->conf->profile_periodicity = elem->data[2]; 7055 else 7056 link->conf->profile_periodicity = 0; 7057 7058 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7059 beacon_ies->data, beacon_ies->len); 7060 if (elem && elem->datalen >= 11 && 7061 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7062 link->conf->ema_ap = true; 7063 else 7064 link->conf->ema_ap = false; 7065 7066 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7067 beacon_ies->data, beacon_ies->len); 7068 eht_oper = (const void *)(elem->data + 1); 7069 7070 if (elem && 7071 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7072 elem->datalen - 1) && 7073 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7074 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7075 const struct ieee80211_eht_operation_info *info = 7076 (void *)eht_oper->optional; 7077 const u8 *disable_subchannel_bitmap = info->optional; 7078 u16 bitmap; 7079 7080 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7081 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7082 &link->conf->chandef)) 7083 ieee80211_handle_puncturing_bitmap(link, 7084 eht_oper, 7085 bitmap, 7086 NULL); 7087 else 7088 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7089 } 7090 } 7091 rcu_read_unlock(); 7092 7093 if (bss->corrupt_data) { 7094 char *corrupt_type = "data"; 7095 7096 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7097 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7098 corrupt_type = "beacon and probe response"; 7099 else 7100 corrupt_type = "beacon"; 7101 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7102 corrupt_type = "probe response"; 7103 } 7104 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7105 cbss->bssid, corrupt_type); 7106 } 7107 7108 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7109 if (sdata->u.mgd.powersave) 7110 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7111 else 7112 link->smps_mode = IEEE80211_SMPS_OFF; 7113 } else { 7114 link->smps_mode = link->u.mgd.req_smps; 7115 } 7116 7117 return conn_flags; 7118 } 7119 7120 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7121 struct cfg80211_assoc_request *req) 7122 { 7123 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7124 struct ieee80211_local *local = sdata->local; 7125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7126 struct ieee80211_mgd_assoc_data *assoc_data; 7127 const struct element *ssid_elem; 7128 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7129 ieee80211_conn_flags_t conn_flags = 0; 7130 struct ieee80211_link_data *link; 7131 struct cfg80211_bss *cbss; 7132 struct ieee80211_bss *bss; 7133 bool override; 7134 int i, err; 7135 size_t size = sizeof(*assoc_data) + req->ie_len; 7136 7137 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7138 size += req->links[i].elems_len; 7139 7140 /* FIXME: no support for 4-addr MLO yet */ 7141 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7142 return -EOPNOTSUPP; 7143 7144 assoc_data = kzalloc(size, GFP_KERNEL); 7145 if (!assoc_data) 7146 return -ENOMEM; 7147 7148 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7149 7150 rcu_read_lock(); 7151 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7152 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7153 rcu_read_unlock(); 7154 kfree(assoc_data); 7155 return -EINVAL; 7156 } 7157 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7158 assoc_data->ssid_len = ssid_elem->datalen; 7159 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7160 vif_cfg->ssid_len = assoc_data->ssid_len; 7161 rcu_read_unlock(); 7162 7163 if (req->ap_mld_addr) { 7164 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7165 if (!req->links[i].bss) 7166 continue; 7167 link = sdata_dereference(sdata->link[i], sdata); 7168 if (link) 7169 ether_addr_copy(assoc_data->link[i].addr, 7170 link->conf->addr); 7171 else 7172 eth_random_addr(assoc_data->link[i].addr); 7173 } 7174 } else { 7175 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7176 } 7177 7178 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7179 7180 memcpy(assoc_data->ap_addr, 7181 req->ap_mld_addr ?: req->bss->bssid, 7182 ETH_ALEN); 7183 7184 if (ifmgd->associated) { 7185 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7186 7187 sdata_info(sdata, 7188 "disconnect from AP %pM for new assoc to %pM\n", 7189 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7190 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7191 WLAN_REASON_UNSPECIFIED, 7192 false, frame_buf); 7193 7194 ieee80211_report_disconnect(sdata, frame_buf, 7195 sizeof(frame_buf), true, 7196 WLAN_REASON_UNSPECIFIED, 7197 false); 7198 } 7199 7200 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7201 err = -EBUSY; 7202 goto err_free; 7203 } 7204 7205 if (ifmgd->assoc_data) { 7206 err = -EBUSY; 7207 goto err_free; 7208 } 7209 7210 if (ifmgd->auth_data) { 7211 bool match; 7212 7213 /* keep sta info, bssid if matching */ 7214 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7215 assoc_data->ap_addr) && 7216 ifmgd->auth_data->link_id == req->link_id; 7217 ieee80211_destroy_auth_data(sdata, match); 7218 } 7219 7220 /* prepare assoc data */ 7221 7222 bss = (void *)cbss->priv; 7223 assoc_data->wmm = bss->wmm_used && 7224 (local->hw.queues >= IEEE80211_NUM_ACS); 7225 7226 /* 7227 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7228 * We still associate in non-HT mode (11a/b/g) if any one of these 7229 * ciphers is configured as pairwise. 7230 * We can set this to true for non-11n hardware, that'll be checked 7231 * separately along with the peer capabilities. 7232 */ 7233 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7234 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7235 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7236 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7237 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7238 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7239 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7240 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7241 netdev_info(sdata->dev, 7242 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7243 } 7244 } 7245 7246 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7247 if (!bss->wmm_used) { 7248 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7249 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7250 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7251 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7252 netdev_info(sdata->dev, 7253 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7254 } 7255 7256 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7257 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7258 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7259 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7260 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7261 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7262 } 7263 7264 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7265 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7266 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7267 } 7268 7269 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7270 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7271 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7272 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7273 } 7274 7275 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7276 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7277 7278 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7279 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7280 sizeof(ifmgd->ht_capa_mask)); 7281 7282 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7283 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7284 sizeof(ifmgd->vht_capa_mask)); 7285 7286 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7287 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7288 sizeof(ifmgd->s1g_capa_mask)); 7289 7290 if (req->ie && req->ie_len) { 7291 memcpy(assoc_data->ie, req->ie, req->ie_len); 7292 assoc_data->ie_len = req->ie_len; 7293 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7294 } else { 7295 assoc_data->ie_pos = assoc_data->ie; 7296 } 7297 7298 if (req->fils_kek) { 7299 /* should already be checked in cfg80211 - so warn */ 7300 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7301 err = -EINVAL; 7302 goto err_free; 7303 } 7304 memcpy(assoc_data->fils_kek, req->fils_kek, 7305 req->fils_kek_len); 7306 assoc_data->fils_kek_len = req->fils_kek_len; 7307 } 7308 7309 if (req->fils_nonces) 7310 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7311 2 * FILS_NONCE_LEN); 7312 7313 /* default timeout */ 7314 assoc_data->timeout = jiffies; 7315 assoc_data->timeout_started = true; 7316 7317 assoc_data->assoc_link_id = assoc_link_id; 7318 7319 if (req->ap_mld_addr) { 7320 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7321 assoc_data->link[i].conn_flags = conn_flags; 7322 assoc_data->link[i].bss = req->links[i].bss; 7323 } 7324 7325 /* if there was no authentication, set up the link */ 7326 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7327 if (err) 7328 goto err_clear; 7329 } else { 7330 assoc_data->link[0].conn_flags = conn_flags; 7331 assoc_data->link[0].bss = cbss; 7332 } 7333 7334 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7335 if (WARN_ON(!link)) { 7336 err = -EINVAL; 7337 goto err_clear; 7338 } 7339 7340 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7341 conn_flags |= link->u.mgd.conn_flags; 7342 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7343 conn_flags, assoc_link_id); 7344 override = link->u.mgd.conn_flags != conn_flags; 7345 link->u.mgd.conn_flags |= conn_flags; 7346 7347 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7348 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7349 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7350 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7351 7352 if (bss->wmm_used && bss->uapsd_supported && 7353 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7354 assoc_data->uapsd = true; 7355 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7356 } else { 7357 assoc_data->uapsd = false; 7358 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7359 } 7360 7361 if (req->prev_bssid) 7362 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7363 7364 if (req->use_mfp) { 7365 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7366 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7367 } else { 7368 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7369 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7370 } 7371 7372 if (req->flags & ASSOC_REQ_USE_RRM) 7373 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7374 else 7375 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7376 7377 if (req->crypto.control_port) 7378 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7379 else 7380 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7381 7382 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7383 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7384 sdata->control_port_over_nl80211 = 7385 req->crypto.control_port_over_nl80211; 7386 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7387 7388 /* kick off associate process */ 7389 ifmgd->assoc_data = assoc_data; 7390 7391 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7392 if (!assoc_data->link[i].bss) 7393 continue; 7394 if (i == assoc_data->assoc_link_id) 7395 continue; 7396 /* only calculate the flags, hence link == NULL */ 7397 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7398 &assoc_data->link[i].conn_flags); 7399 if (err) 7400 goto err_clear; 7401 } 7402 7403 /* needed for transmitting the assoc frames properly */ 7404 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7405 7406 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7407 req->ap_mld_addr, true, override); 7408 if (err) 7409 goto err_clear; 7410 7411 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7412 link->u.mgd.conn_flags; 7413 7414 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7415 const struct cfg80211_bss_ies *beacon_ies; 7416 7417 rcu_read_lock(); 7418 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7419 7420 if (beacon_ies) { 7421 /* 7422 * Wait up to one beacon interval ... 7423 * should this be more if we miss one? 7424 */ 7425 sdata_info(sdata, "waiting for beacon from %pM\n", 7426 link->u.mgd.bssid); 7427 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7428 assoc_data->timeout_started = true; 7429 assoc_data->need_beacon = true; 7430 } 7431 rcu_read_unlock(); 7432 } 7433 7434 run_again(sdata, assoc_data->timeout); 7435 7436 return 0; 7437 err_clear: 7438 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7439 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7440 BSS_CHANGED_BSSID); 7441 ifmgd->assoc_data = NULL; 7442 err_free: 7443 kfree(assoc_data); 7444 return err; 7445 } 7446 7447 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7448 struct cfg80211_deauth_request *req) 7449 { 7450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7451 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7452 bool tx = !req->local_state_change; 7453 struct ieee80211_prep_tx_info info = { 7454 .subtype = IEEE80211_STYPE_DEAUTH, 7455 }; 7456 7457 if (ifmgd->auth_data && 7458 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7459 sdata_info(sdata, 7460 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7461 req->bssid, req->reason_code, 7462 ieee80211_get_reason_code_string(req->reason_code)); 7463 7464 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7465 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7466 IEEE80211_STYPE_DEAUTH, 7467 req->reason_code, tx, 7468 frame_buf); 7469 ieee80211_destroy_auth_data(sdata, false); 7470 ieee80211_report_disconnect(sdata, frame_buf, 7471 sizeof(frame_buf), true, 7472 req->reason_code, false); 7473 drv_mgd_complete_tx(sdata->local, sdata, &info); 7474 return 0; 7475 } 7476 7477 if (ifmgd->assoc_data && 7478 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7479 sdata_info(sdata, 7480 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7481 req->bssid, req->reason_code, 7482 ieee80211_get_reason_code_string(req->reason_code)); 7483 7484 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7485 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7486 IEEE80211_STYPE_DEAUTH, 7487 req->reason_code, tx, 7488 frame_buf); 7489 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7490 ieee80211_report_disconnect(sdata, frame_buf, 7491 sizeof(frame_buf), true, 7492 req->reason_code, false); 7493 return 0; 7494 } 7495 7496 if (ifmgd->associated && 7497 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7498 sdata_info(sdata, 7499 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7500 req->bssid, req->reason_code, 7501 ieee80211_get_reason_code_string(req->reason_code)); 7502 7503 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7504 req->reason_code, tx, frame_buf); 7505 ieee80211_report_disconnect(sdata, frame_buf, 7506 sizeof(frame_buf), true, 7507 req->reason_code, false); 7508 drv_mgd_complete_tx(sdata->local, sdata, &info); 7509 return 0; 7510 } 7511 7512 return -ENOTCONN; 7513 } 7514 7515 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7516 struct cfg80211_disassoc_request *req) 7517 { 7518 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7519 7520 if (!sdata->u.mgd.associated || 7521 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7522 return -ENOTCONN; 7523 7524 sdata_info(sdata, 7525 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7526 req->ap_addr, req->reason_code, 7527 ieee80211_get_reason_code_string(req->reason_code)); 7528 7529 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7530 req->reason_code, !req->local_state_change, 7531 frame_buf); 7532 7533 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7534 req->reason_code, false); 7535 7536 return 0; 7537 } 7538 7539 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7540 { 7541 cancel_work_sync(&link->u.mgd.request_smps_work); 7542 cancel_work_sync(&link->u.mgd.chswitch_work); 7543 } 7544 7545 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7546 { 7547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7548 7549 /* 7550 * Make sure some work items will not run after this, 7551 * they will not do anything but might not have been 7552 * cancelled when disconnecting. 7553 */ 7554 cancel_work_sync(&ifmgd->monitor_work); 7555 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7556 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7557 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7558 7559 sdata_lock(sdata); 7560 if (ifmgd->assoc_data) 7561 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7562 if (ifmgd->auth_data) 7563 ieee80211_destroy_auth_data(sdata, false); 7564 spin_lock_bh(&ifmgd->teardown_lock); 7565 if (ifmgd->teardown_skb) { 7566 kfree_skb(ifmgd->teardown_skb); 7567 ifmgd->teardown_skb = NULL; 7568 ifmgd->orig_teardown_skb = NULL; 7569 } 7570 kfree(ifmgd->assoc_req_ies); 7571 ifmgd->assoc_req_ies = NULL; 7572 ifmgd->assoc_req_ies_len = 0; 7573 spin_unlock_bh(&ifmgd->teardown_lock); 7574 del_timer_sync(&ifmgd->timer); 7575 sdata_unlock(sdata); 7576 } 7577 7578 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7579 enum nl80211_cqm_rssi_threshold_event rssi_event, 7580 s32 rssi_level, 7581 gfp_t gfp) 7582 { 7583 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7584 7585 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7586 7587 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7588 } 7589 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7590 7591 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7592 { 7593 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7594 7595 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7596 7597 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7598 } 7599 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7600 7601 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7602 int rssi_min_thold, 7603 int rssi_max_thold) 7604 { 7605 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7606 7607 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7608 return; 7609 7610 /* 7611 * Scale up threshold values before storing it, as the RSSI averaging 7612 * algorithm uses a scaled up value as well. Change this scaling 7613 * factor if the RSSI averaging algorithm changes. 7614 */ 7615 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7616 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7617 } 7618 7619 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7620 int rssi_min_thold, 7621 int rssi_max_thold) 7622 { 7623 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7624 7625 WARN_ON(rssi_min_thold == rssi_max_thold || 7626 rssi_min_thold > rssi_max_thold); 7627 7628 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7629 rssi_max_thold); 7630 } 7631 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7632 7633 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7634 { 7635 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7636 7637 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7638 } 7639 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7640