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 added = false; 1221 int i, j; 1222 u8 *len, *list_len = NULL; 1223 1224 skb_put_u8(skb, WLAN_EID_EXTENSION); 1225 len = skb_put(skb, 1); 1226 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1227 1228 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1229 u16 elem = outer[i]; 1230 bool have_inner = false; 1231 bool at_extension = 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 } 1261 1262 if (!added) 1263 skb_trim(skb, skb_len); 1264 else 1265 *len = skb->len - skb_len - 2; 1266 } 1267 1268 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1269 struct sk_buff *skb, u16 capab, 1270 const struct element *ext_capa, 1271 const u16 *outer_present_elems) 1272 { 1273 struct ieee80211_local *local = sdata->local; 1274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1275 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1276 struct ieee80211_multi_link_elem *ml_elem; 1277 struct ieee80211_mle_basic_common_info *common; 1278 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1279 __le16 eml_capa = 0, mld_capa_ops = 0; 1280 unsigned int link_id; 1281 u8 *ml_elem_len; 1282 void *capab_pos; 1283 1284 if (!sdata->vif.valid_links) 1285 return; 1286 1287 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1288 ieee80211_vif_type_p2p(&sdata->vif)); 1289 if (ift_ext_capa) { 1290 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1291 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1292 } 1293 1294 skb_put_u8(skb, WLAN_EID_EXTENSION); 1295 ml_elem_len = skb_put(skb, 1); 1296 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1297 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1298 ml_elem->control = 1299 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1300 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1301 common = skb_put(skb, sizeof(*common)); 1302 common->len = sizeof(*common) + 1303 2; /* MLD capa/ops */ 1304 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1305 1306 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1307 if (eml_capa & 1308 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1309 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1310 common->len += 2; /* EML capabilities */ 1311 ml_elem->control |= 1312 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1313 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1314 } 1315 /* need indication from userspace to support this */ 1316 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1317 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1318 1319 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1320 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1321 const u8 *extra_elems; 1322 size_t extra_elems_len; 1323 size_t extra_used; 1324 u8 *subelem_len = NULL; 1325 __le16 ctrl; 1326 1327 if (!assoc_data->link[link_id].bss || 1328 link_id == assoc_data->assoc_link_id) 1329 continue; 1330 1331 extra_elems = assoc_data->link[link_id].elems; 1332 extra_elems_len = assoc_data->link[link_id].elems_len; 1333 1334 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1335 subelem_len = skb_put(skb, 1); 1336 1337 ctrl = cpu_to_le16(link_id | 1338 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1339 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1340 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1341 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1342 skb_put_data(skb, assoc_data->link[link_id].addr, 1343 ETH_ALEN); 1344 /* 1345 * Now add the contents of the (re)association request, 1346 * but the "listen interval" and "current AP address" 1347 * (if applicable) are skipped. So we only have 1348 * the capability field (remember the position and fill 1349 * later), followed by the elements added below by 1350 * calling ieee80211_assoc_link_elems(). 1351 */ 1352 capab_pos = skb_put(skb, 2); 1353 1354 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1355 ext_capa, 1356 extra_elems, 1357 extra_elems_len, 1358 link_id, NULL, 1359 link_present_elems); 1360 if (extra_elems) 1361 skb_put_data(skb, extra_elems + extra_used, 1362 extra_elems_len - extra_used); 1363 1364 put_unaligned_le16(capab, capab_pos); 1365 1366 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1367 link_present_elems); 1368 1369 ieee80211_fragment_element(skb, subelem_len); 1370 } 1371 1372 ieee80211_fragment_element(skb, ml_elem_len); 1373 } 1374 1375 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1376 { 1377 struct ieee80211_local *local = sdata->local; 1378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1379 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1380 struct ieee80211_link_data *link; 1381 struct sk_buff *skb; 1382 struct ieee80211_mgmt *mgmt; 1383 u8 *pos, qos_info, *ie_start; 1384 size_t offset, noffset; 1385 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1386 __le16 listen_int; 1387 struct element *ext_capa = NULL; 1388 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1389 struct ieee80211_prep_tx_info info = {}; 1390 unsigned int link_id, n_links = 0; 1391 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1392 void *capab_pos; 1393 size_t size; 1394 int ret; 1395 1396 /* we know it's writable, cast away the const */ 1397 if (assoc_data->ie_len) 1398 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1399 assoc_data->ie, 1400 assoc_data->ie_len); 1401 1402 sdata_assert_lock(sdata); 1403 1404 size = local->hw.extra_tx_headroom + 1405 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1406 2 + assoc_data->ssid_len + /* SSID */ 1407 assoc_data->ie_len + /* extra IEs */ 1408 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1409 9; /* WMM */ 1410 1411 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1412 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1413 const struct ieee80211_sband_iftype_data *iftd; 1414 struct ieee80211_supported_band *sband; 1415 1416 if (!cbss) 1417 continue; 1418 1419 sband = local->hw.wiphy->bands[cbss->channel->band]; 1420 1421 n_links++; 1422 /* add STA profile elements length */ 1423 size += assoc_data->link[link_id].elems_len; 1424 /* and supported rates length */ 1425 size += 4 + sband->n_bitrates; 1426 /* supported channels */ 1427 size += 2 + 2 * sband->n_channels; 1428 1429 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1430 if (iftd) 1431 size += iftd->vendor_elems.len; 1432 1433 /* power capability */ 1434 size += 4; 1435 1436 /* HT, VHT, HE, EHT */ 1437 size += 2 + sizeof(struct ieee80211_ht_cap); 1438 size += 2 + sizeof(struct ieee80211_vht_cap); 1439 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1440 sizeof(struct ieee80211_he_mcs_nss_supp) + 1441 IEEE80211_HE_PPE_THRES_MAX_LEN; 1442 1443 if (sband->band == NL80211_BAND_6GHZ) 1444 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1445 1446 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1447 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1448 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1449 1450 /* non-inheritance element */ 1451 size += 2 + 2 + PRESENT_ELEMS_MAX; 1452 1453 /* should be the same across all BSSes */ 1454 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1455 capab |= WLAN_CAPABILITY_PRIVACY; 1456 } 1457 1458 if (sdata->vif.valid_links) { 1459 /* consider the multi-link element with STA profile */ 1460 size += sizeof(struct ieee80211_multi_link_elem); 1461 /* max common info field in basic multi-link element */ 1462 size += sizeof(struct ieee80211_mle_basic_common_info) + 1463 2 + /* capa & op */ 1464 2; /* EML capa */ 1465 1466 /* 1467 * The capability elements were already considered above; 1468 * note this over-estimates a bit because there's no 1469 * STA profile for the assoc link. 1470 */ 1471 size += (n_links - 1) * 1472 (1 + 1 + /* subelement ID/length */ 1473 2 + /* STA control */ 1474 1 + ETH_ALEN + 2 /* STA Info field */); 1475 } 1476 1477 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1478 if (WARN_ON(!link)) 1479 return -EINVAL; 1480 1481 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1482 return -EINVAL; 1483 1484 skb = alloc_skb(size, GFP_KERNEL); 1485 if (!skb) 1486 return -ENOMEM; 1487 1488 skb_reserve(skb, local->hw.extra_tx_headroom); 1489 1490 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1491 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1492 1493 /* Set MBSSID support for HE AP if needed */ 1494 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1495 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1496 ext_capa && ext_capa->datalen >= 3) 1497 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1498 1499 mgmt = skb_put_zero(skb, 24); 1500 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1502 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1503 1504 listen_int = cpu_to_le16(assoc_data->s1g ? 1505 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1506 local->hw.conf.listen_interval); 1507 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1508 skb_put(skb, 10); 1509 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1510 IEEE80211_STYPE_REASSOC_REQ); 1511 capab_pos = &mgmt->u.reassoc_req.capab_info; 1512 mgmt->u.reassoc_req.listen_interval = listen_int; 1513 memcpy(mgmt->u.reassoc_req.current_ap, 1514 assoc_data->prev_ap_addr, ETH_ALEN); 1515 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1516 } else { 1517 skb_put(skb, 4); 1518 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1519 IEEE80211_STYPE_ASSOC_REQ); 1520 capab_pos = &mgmt->u.assoc_req.capab_info; 1521 mgmt->u.assoc_req.listen_interval = listen_int; 1522 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1523 } 1524 1525 /* SSID */ 1526 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1527 ie_start = pos; 1528 *pos++ = WLAN_EID_SSID; 1529 *pos++ = assoc_data->ssid_len; 1530 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1531 1532 /* add the elements for the assoc (main) link */ 1533 link_capab = capab; 1534 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1535 ext_capa, 1536 assoc_data->ie, 1537 assoc_data->ie_len, 1538 assoc_data->assoc_link_id, link, 1539 present_elems); 1540 put_unaligned_le16(link_capab, capab_pos); 1541 1542 /* if present, add any custom non-vendor IEs */ 1543 if (assoc_data->ie_len) { 1544 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1545 assoc_data->ie_len, 1546 offset); 1547 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1548 offset = noffset; 1549 } 1550 1551 if (assoc_data->wmm) { 1552 if (assoc_data->uapsd) { 1553 qos_info = ifmgd->uapsd_queues; 1554 qos_info |= (ifmgd->uapsd_max_sp_len << 1555 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1556 } else { 1557 qos_info = 0; 1558 } 1559 1560 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1561 } 1562 1563 /* add any remaining custom (i.e. vendor specific here) IEs */ 1564 if (assoc_data->ie_len) { 1565 noffset = assoc_data->ie_len; 1566 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1567 } 1568 1569 if (assoc_data->fils_kek_len) { 1570 ret = fils_encrypt_assoc_req(skb, assoc_data); 1571 if (ret < 0) { 1572 dev_kfree_skb(skb); 1573 return ret; 1574 } 1575 } 1576 1577 pos = skb_tail_pointer(skb); 1578 kfree(ifmgd->assoc_req_ies); 1579 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1580 if (!ifmgd->assoc_req_ies) { 1581 dev_kfree_skb(skb); 1582 return -ENOMEM; 1583 } 1584 1585 ifmgd->assoc_req_ies_len = pos - ie_start; 1586 1587 drv_mgd_prepare_tx(local, sdata, &info); 1588 1589 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1590 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1591 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1592 IEEE80211_TX_INTFL_MLME_CONN_TX; 1593 ieee80211_tx_skb(sdata, skb); 1594 1595 return 0; 1596 } 1597 1598 void ieee80211_send_pspoll(struct ieee80211_local *local, 1599 struct ieee80211_sub_if_data *sdata) 1600 { 1601 struct ieee80211_pspoll *pspoll; 1602 struct sk_buff *skb; 1603 1604 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1605 if (!skb) 1606 return; 1607 1608 pspoll = (struct ieee80211_pspoll *) skb->data; 1609 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1610 1611 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1612 ieee80211_tx_skb(sdata, skb); 1613 } 1614 1615 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1616 struct ieee80211_sub_if_data *sdata, 1617 bool powersave) 1618 { 1619 struct sk_buff *skb; 1620 struct ieee80211_hdr_3addr *nullfunc; 1621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1622 1623 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1624 !ieee80211_hw_check(&local->hw, 1625 DOESNT_SUPPORT_QOS_NDP)); 1626 if (!skb) 1627 return; 1628 1629 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1630 if (powersave) 1631 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1632 1633 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1634 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1635 1636 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1637 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1638 1639 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1640 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1641 1642 ieee80211_tx_skb(sdata, skb); 1643 } 1644 1645 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1646 struct ieee80211_sub_if_data *sdata) 1647 { 1648 struct sk_buff *skb; 1649 struct ieee80211_hdr *nullfunc; 1650 __le16 fc; 1651 1652 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1653 return; 1654 1655 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1656 if (!skb) 1657 return; 1658 1659 skb_reserve(skb, local->hw.extra_tx_headroom); 1660 1661 nullfunc = skb_put_zero(skb, 30); 1662 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1663 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1664 nullfunc->frame_control = fc; 1665 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1666 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1667 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1668 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1669 1670 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1671 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1672 ieee80211_tx_skb(sdata, skb); 1673 } 1674 1675 /* spectrum management related things */ 1676 static void ieee80211_chswitch_work(struct work_struct *work) 1677 { 1678 struct ieee80211_link_data *link = 1679 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1680 struct ieee80211_sub_if_data *sdata = link->sdata; 1681 struct ieee80211_local *local = sdata->local; 1682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1683 int ret; 1684 1685 if (!ieee80211_sdata_running(sdata)) 1686 return; 1687 1688 sdata_lock(sdata); 1689 mutex_lock(&local->mtx); 1690 mutex_lock(&local->chanctx_mtx); 1691 1692 if (!ifmgd->associated) 1693 goto out; 1694 1695 if (!link->conf->csa_active) 1696 goto out; 1697 1698 /* 1699 * using reservation isn't immediate as it may be deferred until later 1700 * with multi-vif. once reservation is complete it will re-schedule the 1701 * work with no reserved_chanctx so verify chandef to check if it 1702 * completed successfully 1703 */ 1704 1705 if (link->reserved_chanctx) { 1706 /* 1707 * with multi-vif csa driver may call ieee80211_csa_finish() 1708 * many times while waiting for other interfaces to use their 1709 * reservations 1710 */ 1711 if (link->reserved_ready) 1712 goto out; 1713 1714 ret = ieee80211_link_use_reserved_context(link); 1715 if (ret) { 1716 sdata_info(sdata, 1717 "failed to use reserved channel context, disconnecting (err=%d)\n", 1718 ret); 1719 ieee80211_queue_work(&sdata->local->hw, 1720 &ifmgd->csa_connection_drop_work); 1721 goto out; 1722 } 1723 1724 goto out; 1725 } 1726 1727 if (!cfg80211_chandef_identical(&link->conf->chandef, 1728 &link->csa_chandef)) { 1729 sdata_info(sdata, 1730 "failed to finalize channel switch, disconnecting\n"); 1731 ieee80211_queue_work(&sdata->local->hw, 1732 &ifmgd->csa_connection_drop_work); 1733 goto out; 1734 } 1735 1736 link->u.mgd.csa_waiting_bcn = true; 1737 1738 ieee80211_sta_reset_beacon_monitor(sdata); 1739 ieee80211_sta_reset_conn_monitor(sdata); 1740 1741 out: 1742 mutex_unlock(&local->chanctx_mtx); 1743 mutex_unlock(&local->mtx); 1744 sdata_unlock(sdata); 1745 } 1746 1747 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1748 { 1749 struct ieee80211_sub_if_data *sdata = link->sdata; 1750 struct ieee80211_local *local = sdata->local; 1751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1752 int ret; 1753 1754 sdata_assert_lock(sdata); 1755 1756 WARN_ON(!link->conf->csa_active); 1757 1758 if (link->csa_block_tx) { 1759 ieee80211_wake_vif_queues(local, sdata, 1760 IEEE80211_QUEUE_STOP_REASON_CSA); 1761 link->csa_block_tx = false; 1762 } 1763 1764 link->conf->csa_active = false; 1765 link->u.mgd.csa_waiting_bcn = false; 1766 /* 1767 * If the CSA IE is still present on the beacon after the switch, 1768 * we need to consider it as a new CSA (possibly to self). 1769 */ 1770 link->u.mgd.beacon_crc_valid = false; 1771 1772 ret = drv_post_channel_switch(sdata); 1773 if (ret) { 1774 sdata_info(sdata, 1775 "driver post channel switch failed, disconnecting\n"); 1776 ieee80211_queue_work(&local->hw, 1777 &ifmgd->csa_connection_drop_work); 1778 return; 1779 } 1780 1781 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1782 } 1783 1784 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1785 { 1786 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1788 1789 if (WARN_ON(sdata->vif.valid_links)) 1790 success = false; 1791 1792 trace_api_chswitch_done(sdata, success); 1793 if (!success) { 1794 sdata_info(sdata, 1795 "driver channel switch failed, disconnecting\n"); 1796 ieee80211_queue_work(&sdata->local->hw, 1797 &ifmgd->csa_connection_drop_work); 1798 } else { 1799 ieee80211_queue_work(&sdata->local->hw, 1800 &sdata->deflink.u.mgd.chswitch_work); 1801 } 1802 } 1803 EXPORT_SYMBOL(ieee80211_chswitch_done); 1804 1805 static void ieee80211_chswitch_timer(struct timer_list *t) 1806 { 1807 struct ieee80211_link_data *link = 1808 from_timer(link, t, u.mgd.chswitch_timer); 1809 1810 ieee80211_queue_work(&link->sdata->local->hw, 1811 &link->u.mgd.chswitch_work); 1812 } 1813 1814 static void 1815 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1816 { 1817 struct ieee80211_sub_if_data *sdata = link->sdata; 1818 struct ieee80211_local *local = sdata->local; 1819 1820 if (!local->ops->abort_channel_switch) 1821 return; 1822 1823 mutex_lock(&local->mtx); 1824 1825 mutex_lock(&local->chanctx_mtx); 1826 ieee80211_link_unreserve_chanctx(link); 1827 mutex_unlock(&local->chanctx_mtx); 1828 1829 if (link->csa_block_tx) 1830 ieee80211_wake_vif_queues(local, sdata, 1831 IEEE80211_QUEUE_STOP_REASON_CSA); 1832 1833 link->csa_block_tx = false; 1834 link->conf->csa_active = false; 1835 1836 mutex_unlock(&local->mtx); 1837 1838 drv_abort_channel_switch(sdata); 1839 } 1840 1841 static void 1842 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1843 u64 timestamp, u32 device_timestamp, 1844 struct ieee802_11_elems *elems, 1845 bool beacon) 1846 { 1847 struct ieee80211_sub_if_data *sdata = link->sdata; 1848 struct ieee80211_local *local = sdata->local; 1849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1850 struct cfg80211_bss *cbss = link->u.mgd.bss; 1851 struct ieee80211_chanctx_conf *conf; 1852 struct ieee80211_chanctx *chanctx; 1853 enum nl80211_band current_band; 1854 struct ieee80211_csa_ie csa_ie; 1855 struct ieee80211_channel_switch ch_switch; 1856 struct ieee80211_bss *bss; 1857 int res; 1858 1859 sdata_assert_lock(sdata); 1860 1861 if (!cbss) 1862 return; 1863 1864 if (local->scanning) 1865 return; 1866 1867 current_band = cbss->channel->band; 1868 bss = (void *)cbss->priv; 1869 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1870 bss->vht_cap_info, 1871 link->u.mgd.conn_flags, 1872 link->u.mgd.bssid, &csa_ie); 1873 1874 if (!res) { 1875 ch_switch.timestamp = timestamp; 1876 ch_switch.device_timestamp = device_timestamp; 1877 ch_switch.block_tx = csa_ie.mode; 1878 ch_switch.chandef = csa_ie.chandef; 1879 ch_switch.count = csa_ie.count; 1880 ch_switch.delay = csa_ie.max_switch_time; 1881 } 1882 1883 if (res < 0) 1884 goto lock_and_drop_connection; 1885 1886 if (beacon && link->conf->csa_active && 1887 !link->u.mgd.csa_waiting_bcn) { 1888 if (res) 1889 ieee80211_sta_abort_chanswitch(link); 1890 else 1891 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1892 return; 1893 } else if (link->conf->csa_active || res) { 1894 /* disregard subsequent announcements if already processing */ 1895 return; 1896 } 1897 1898 if (link->conf->chandef.chan->band != 1899 csa_ie.chandef.chan->band) { 1900 sdata_info(sdata, 1901 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1902 link->u.mgd.bssid, 1903 csa_ie.chandef.chan->center_freq, 1904 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1905 csa_ie.chandef.center_freq2); 1906 goto lock_and_drop_connection; 1907 } 1908 1909 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1910 IEEE80211_CHAN_DISABLED)) { 1911 sdata_info(sdata, 1912 "AP %pM switches to unsupported channel " 1913 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1914 "disconnecting\n", 1915 link->u.mgd.bssid, 1916 csa_ie.chandef.chan->center_freq, 1917 csa_ie.chandef.chan->freq_offset, 1918 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1919 csa_ie.chandef.freq1_offset, 1920 csa_ie.chandef.center_freq2); 1921 goto lock_and_drop_connection; 1922 } 1923 1924 if (cfg80211_chandef_identical(&csa_ie.chandef, 1925 &link->conf->chandef) && 1926 (!csa_ie.mode || !beacon)) { 1927 if (link->u.mgd.csa_ignored_same_chan) 1928 return; 1929 sdata_info(sdata, 1930 "AP %pM tries to chanswitch to same channel, ignore\n", 1931 link->u.mgd.bssid); 1932 link->u.mgd.csa_ignored_same_chan = true; 1933 return; 1934 } 1935 1936 /* 1937 * Drop all TDLS peers - either we disconnect or move to a different 1938 * channel from this point on. There's no telling what our peer will do. 1939 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1940 * have an incompatible wider chandef. 1941 */ 1942 ieee80211_teardown_tdls_peers(sdata); 1943 1944 mutex_lock(&local->mtx); 1945 mutex_lock(&local->chanctx_mtx); 1946 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1947 lockdep_is_held(&local->chanctx_mtx)); 1948 if (!conf) { 1949 sdata_info(sdata, 1950 "no channel context assigned to vif?, disconnecting\n"); 1951 goto drop_connection; 1952 } 1953 1954 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1955 1956 if (local->use_chanctx && 1957 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1958 sdata_info(sdata, 1959 "driver doesn't support chan-switch with channel contexts\n"); 1960 goto drop_connection; 1961 } 1962 1963 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1964 sdata_info(sdata, 1965 "preparing for channel switch failed, disconnecting\n"); 1966 goto drop_connection; 1967 } 1968 1969 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1970 chanctx->mode, false); 1971 if (res) { 1972 sdata_info(sdata, 1973 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1974 res); 1975 goto drop_connection; 1976 } 1977 mutex_unlock(&local->chanctx_mtx); 1978 1979 link->conf->csa_active = true; 1980 link->csa_chandef = csa_ie.chandef; 1981 link->csa_block_tx = csa_ie.mode; 1982 link->u.mgd.csa_ignored_same_chan = false; 1983 link->u.mgd.beacon_crc_valid = false; 1984 1985 if (link->csa_block_tx) 1986 ieee80211_stop_vif_queues(local, sdata, 1987 IEEE80211_QUEUE_STOP_REASON_CSA); 1988 mutex_unlock(&local->mtx); 1989 1990 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1991 csa_ie.count, csa_ie.mode, 0); 1992 1993 if (local->ops->channel_switch) { 1994 /* use driver's channel switch callback */ 1995 drv_channel_switch(local, sdata, &ch_switch); 1996 return; 1997 } 1998 1999 /* channel switch handled in software */ 2000 if (csa_ie.count <= 1) 2001 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 2002 else 2003 mod_timer(&link->u.mgd.chswitch_timer, 2004 TU_TO_EXP_TIME((csa_ie.count - 1) * 2005 cbss->beacon_interval)); 2006 return; 2007 lock_and_drop_connection: 2008 mutex_lock(&local->mtx); 2009 mutex_lock(&local->chanctx_mtx); 2010 drop_connection: 2011 /* 2012 * This is just so that the disconnect flow will know that 2013 * we were trying to switch channel and failed. In case the 2014 * mode is 1 (we are not allowed to Tx), we will know not to 2015 * send a deauthentication frame. Those two fields will be 2016 * reset when the disconnection worker runs. 2017 */ 2018 link->conf->csa_active = true; 2019 link->csa_block_tx = csa_ie.mode; 2020 2021 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 2022 mutex_unlock(&local->chanctx_mtx); 2023 mutex_unlock(&local->mtx); 2024 } 2025 2026 static bool 2027 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2028 struct ieee80211_channel *channel, 2029 const u8 *country_ie, u8 country_ie_len, 2030 const u8 *pwr_constr_elem, 2031 int *chan_pwr, int *pwr_reduction) 2032 { 2033 struct ieee80211_country_ie_triplet *triplet; 2034 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2035 int i, chan_increment; 2036 bool have_chan_pwr = false; 2037 2038 /* Invalid IE */ 2039 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2040 return false; 2041 2042 triplet = (void *)(country_ie + 3); 2043 country_ie_len -= 3; 2044 2045 switch (channel->band) { 2046 default: 2047 WARN_ON_ONCE(1); 2048 fallthrough; 2049 case NL80211_BAND_2GHZ: 2050 case NL80211_BAND_60GHZ: 2051 case NL80211_BAND_LC: 2052 chan_increment = 1; 2053 break; 2054 case NL80211_BAND_5GHZ: 2055 chan_increment = 4; 2056 break; 2057 case NL80211_BAND_6GHZ: 2058 /* 2059 * In the 6 GHz band, the "maximum transmit power level" 2060 * field in the triplets is reserved, and thus will be 2061 * zero and we shouldn't use it to control TX power. 2062 * The actual TX power will be given in the transmit 2063 * power envelope element instead. 2064 */ 2065 return false; 2066 } 2067 2068 /* find channel */ 2069 while (country_ie_len >= 3) { 2070 u8 first_channel = triplet->chans.first_channel; 2071 2072 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2073 goto next; 2074 2075 for (i = 0; i < triplet->chans.num_channels; i++) { 2076 if (first_channel + i * chan_increment == chan) { 2077 have_chan_pwr = true; 2078 *chan_pwr = triplet->chans.max_power; 2079 break; 2080 } 2081 } 2082 if (have_chan_pwr) 2083 break; 2084 2085 next: 2086 triplet++; 2087 country_ie_len -= 3; 2088 } 2089 2090 if (have_chan_pwr && pwr_constr_elem) 2091 *pwr_reduction = *pwr_constr_elem; 2092 else 2093 *pwr_reduction = 0; 2094 2095 return have_chan_pwr; 2096 } 2097 2098 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2099 struct ieee80211_channel *channel, 2100 const u8 *cisco_dtpc_ie, 2101 int *pwr_level) 2102 { 2103 /* From practical testing, the first data byte of the DTPC element 2104 * seems to contain the requested dBm level, and the CLI on Cisco 2105 * APs clearly state the range is -127 to 127 dBm, which indicates 2106 * a signed byte, although it seemingly never actually goes negative. 2107 * The other byte seems to always be zero. 2108 */ 2109 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2110 } 2111 2112 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2113 struct ieee80211_channel *channel, 2114 struct ieee80211_mgmt *mgmt, 2115 const u8 *country_ie, u8 country_ie_len, 2116 const u8 *pwr_constr_ie, 2117 const u8 *cisco_dtpc_ie) 2118 { 2119 struct ieee80211_sub_if_data *sdata = link->sdata; 2120 bool has_80211h_pwr = false, has_cisco_pwr = false; 2121 int chan_pwr = 0, pwr_reduction_80211h = 0; 2122 int pwr_level_cisco, pwr_level_80211h; 2123 int new_ap_level; 2124 __le16 capab = mgmt->u.probe_resp.capab_info; 2125 2126 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2127 return 0; /* TODO */ 2128 2129 if (country_ie && 2130 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2131 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2132 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2133 sdata, channel, country_ie, country_ie_len, 2134 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2135 pwr_level_80211h = 2136 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2137 } 2138 2139 if (cisco_dtpc_ie) { 2140 ieee80211_find_cisco_dtpc( 2141 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2142 has_cisco_pwr = true; 2143 } 2144 2145 if (!has_80211h_pwr && !has_cisco_pwr) 2146 return 0; 2147 2148 /* If we have both 802.11h and Cisco DTPC, apply both limits 2149 * by picking the smallest of the two power levels advertised. 2150 */ 2151 if (has_80211h_pwr && 2152 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2153 new_ap_level = pwr_level_80211h; 2154 2155 if (link->ap_power_level == new_ap_level) 2156 return 0; 2157 2158 sdata_dbg(sdata, 2159 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2160 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2161 link->u.mgd.bssid); 2162 } else { /* has_cisco_pwr is always true here. */ 2163 new_ap_level = pwr_level_cisco; 2164 2165 if (link->ap_power_level == new_ap_level) 2166 return 0; 2167 2168 sdata_dbg(sdata, 2169 "Limiting TX power to %d dBm as advertised by %pM\n", 2170 pwr_level_cisco, link->u.mgd.bssid); 2171 } 2172 2173 link->ap_power_level = new_ap_level; 2174 if (__ieee80211_recalc_txpower(sdata)) 2175 return BSS_CHANGED_TXPOWER; 2176 return 0; 2177 } 2178 2179 /* powersave */ 2180 static void ieee80211_enable_ps(struct ieee80211_local *local, 2181 struct ieee80211_sub_if_data *sdata) 2182 { 2183 struct ieee80211_conf *conf = &local->hw.conf; 2184 2185 /* 2186 * If we are scanning right now then the parameters will 2187 * take effect when scan finishes. 2188 */ 2189 if (local->scanning) 2190 return; 2191 2192 if (conf->dynamic_ps_timeout > 0 && 2193 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2194 mod_timer(&local->dynamic_ps_timer, jiffies + 2195 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2196 } else { 2197 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2198 ieee80211_send_nullfunc(local, sdata, true); 2199 2200 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2201 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2202 return; 2203 2204 conf->flags |= IEEE80211_CONF_PS; 2205 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2206 } 2207 } 2208 2209 static void ieee80211_change_ps(struct ieee80211_local *local) 2210 { 2211 struct ieee80211_conf *conf = &local->hw.conf; 2212 2213 if (local->ps_sdata) { 2214 ieee80211_enable_ps(local, local->ps_sdata); 2215 } else if (conf->flags & IEEE80211_CONF_PS) { 2216 conf->flags &= ~IEEE80211_CONF_PS; 2217 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2218 del_timer_sync(&local->dynamic_ps_timer); 2219 cancel_work_sync(&local->dynamic_ps_enable_work); 2220 } 2221 } 2222 2223 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2224 { 2225 struct ieee80211_local *local = sdata->local; 2226 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2227 struct sta_info *sta = NULL; 2228 bool authorized = false; 2229 2230 if (!mgd->powersave) 2231 return false; 2232 2233 if (mgd->broken_ap) 2234 return false; 2235 2236 if (!mgd->associated) 2237 return false; 2238 2239 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2240 return false; 2241 2242 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2243 !sdata->deflink.u.mgd.have_beacon) 2244 return false; 2245 2246 rcu_read_lock(); 2247 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2248 if (sta) 2249 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2250 rcu_read_unlock(); 2251 2252 return authorized; 2253 } 2254 2255 /* need to hold RTNL or interface lock */ 2256 void ieee80211_recalc_ps(struct ieee80211_local *local) 2257 { 2258 struct ieee80211_sub_if_data *sdata, *found = NULL; 2259 int count = 0; 2260 int timeout; 2261 2262 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2263 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2264 local->ps_sdata = NULL; 2265 return; 2266 } 2267 2268 list_for_each_entry(sdata, &local->interfaces, list) { 2269 if (!ieee80211_sdata_running(sdata)) 2270 continue; 2271 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2272 /* If an AP vif is found, then disable PS 2273 * by setting the count to zero thereby setting 2274 * ps_sdata to NULL. 2275 */ 2276 count = 0; 2277 break; 2278 } 2279 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2280 continue; 2281 found = sdata; 2282 count++; 2283 } 2284 2285 if (count == 1 && ieee80211_powersave_allowed(found)) { 2286 u8 dtimper = found->deflink.u.mgd.dtim_period; 2287 2288 timeout = local->dynamic_ps_forced_timeout; 2289 if (timeout < 0) 2290 timeout = 100; 2291 local->hw.conf.dynamic_ps_timeout = timeout; 2292 2293 /* If the TIM IE is invalid, pretend the value is 1 */ 2294 if (!dtimper) 2295 dtimper = 1; 2296 2297 local->hw.conf.ps_dtim_period = dtimper; 2298 local->ps_sdata = found; 2299 } else { 2300 local->ps_sdata = NULL; 2301 } 2302 2303 ieee80211_change_ps(local); 2304 } 2305 2306 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2307 { 2308 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2309 2310 if (sdata->vif.cfg.ps != ps_allowed) { 2311 sdata->vif.cfg.ps = ps_allowed; 2312 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2313 } 2314 } 2315 2316 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2317 { 2318 struct ieee80211_local *local = 2319 container_of(work, struct ieee80211_local, 2320 dynamic_ps_disable_work); 2321 2322 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2323 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2324 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2325 } 2326 2327 ieee80211_wake_queues_by_reason(&local->hw, 2328 IEEE80211_MAX_QUEUE_MAP, 2329 IEEE80211_QUEUE_STOP_REASON_PS, 2330 false); 2331 } 2332 2333 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2334 { 2335 struct ieee80211_local *local = 2336 container_of(work, struct ieee80211_local, 2337 dynamic_ps_enable_work); 2338 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2339 struct ieee80211_if_managed *ifmgd; 2340 unsigned long flags; 2341 int q; 2342 2343 /* can only happen when PS was just disabled anyway */ 2344 if (!sdata) 2345 return; 2346 2347 ifmgd = &sdata->u.mgd; 2348 2349 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2350 return; 2351 2352 if (local->hw.conf.dynamic_ps_timeout > 0) { 2353 /* don't enter PS if TX frames are pending */ 2354 if (drv_tx_frames_pending(local)) { 2355 mod_timer(&local->dynamic_ps_timer, jiffies + 2356 msecs_to_jiffies( 2357 local->hw.conf.dynamic_ps_timeout)); 2358 return; 2359 } 2360 2361 /* 2362 * transmission can be stopped by others which leads to 2363 * dynamic_ps_timer expiry. Postpone the ps timer if it 2364 * is not the actual idle state. 2365 */ 2366 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2367 for (q = 0; q < local->hw.queues; q++) { 2368 if (local->queue_stop_reasons[q]) { 2369 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2370 flags); 2371 mod_timer(&local->dynamic_ps_timer, jiffies + 2372 msecs_to_jiffies( 2373 local->hw.conf.dynamic_ps_timeout)); 2374 return; 2375 } 2376 } 2377 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2378 } 2379 2380 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2381 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2382 if (drv_tx_frames_pending(local)) { 2383 mod_timer(&local->dynamic_ps_timer, jiffies + 2384 msecs_to_jiffies( 2385 local->hw.conf.dynamic_ps_timeout)); 2386 } else { 2387 ieee80211_send_nullfunc(local, sdata, true); 2388 /* Flush to get the tx status of nullfunc frame */ 2389 ieee80211_flush_queues(local, sdata, false); 2390 } 2391 } 2392 2393 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2394 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2395 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2396 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2397 local->hw.conf.flags |= IEEE80211_CONF_PS; 2398 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2399 } 2400 } 2401 2402 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2403 { 2404 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2405 2406 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2407 } 2408 2409 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2410 { 2411 struct delayed_work *delayed_work = to_delayed_work(work); 2412 struct ieee80211_link_data *link = 2413 container_of(delayed_work, struct ieee80211_link_data, 2414 dfs_cac_timer_work); 2415 struct cfg80211_chan_def chandef = link->conf->chandef; 2416 struct ieee80211_sub_if_data *sdata = link->sdata; 2417 2418 mutex_lock(&sdata->local->mtx); 2419 if (sdata->wdev.cac_started) { 2420 ieee80211_link_release_channel(link); 2421 cfg80211_cac_event(sdata->dev, &chandef, 2422 NL80211_RADAR_CAC_FINISHED, 2423 GFP_KERNEL); 2424 } 2425 mutex_unlock(&sdata->local->mtx); 2426 } 2427 2428 static bool 2429 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2430 { 2431 struct ieee80211_local *local = sdata->local; 2432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2433 bool ret = false; 2434 int ac; 2435 2436 if (local->hw.queues < IEEE80211_NUM_ACS) 2437 return false; 2438 2439 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2440 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2441 int non_acm_ac; 2442 unsigned long now = jiffies; 2443 2444 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2445 tx_tspec->admitted_time && 2446 time_after(now, tx_tspec->time_slice_start + HZ)) { 2447 tx_tspec->consumed_tx_time = 0; 2448 tx_tspec->time_slice_start = now; 2449 2450 if (tx_tspec->downgraded) 2451 tx_tspec->action = 2452 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2453 } 2454 2455 switch (tx_tspec->action) { 2456 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2457 /* take the original parameters */ 2458 if (drv_conf_tx(local, &sdata->deflink, ac, 2459 &sdata->deflink.tx_conf[ac])) 2460 link_err(&sdata->deflink, 2461 "failed to set TX queue parameters for queue %d\n", 2462 ac); 2463 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2464 tx_tspec->downgraded = false; 2465 ret = true; 2466 break; 2467 case TX_TSPEC_ACTION_DOWNGRADE: 2468 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2469 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2470 ret = true; 2471 break; 2472 } 2473 /* downgrade next lower non-ACM AC */ 2474 for (non_acm_ac = ac + 1; 2475 non_acm_ac < IEEE80211_NUM_ACS; 2476 non_acm_ac++) 2477 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2478 break; 2479 /* Usually the loop will result in using BK even if it 2480 * requires admission control, but such a configuration 2481 * makes no sense and we have to transmit somehow - the 2482 * AC selection does the same thing. 2483 * If we started out trying to downgrade from BK, then 2484 * the extra condition here might be needed. 2485 */ 2486 if (non_acm_ac >= IEEE80211_NUM_ACS) 2487 non_acm_ac = IEEE80211_AC_BK; 2488 if (drv_conf_tx(local, &sdata->deflink, ac, 2489 &sdata->deflink.tx_conf[non_acm_ac])) 2490 link_err(&sdata->deflink, 2491 "failed to set TX queue parameters for queue %d\n", 2492 ac); 2493 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2494 ret = true; 2495 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2496 tx_tspec->time_slice_start + HZ - now + 1); 2497 break; 2498 case TX_TSPEC_ACTION_NONE: 2499 /* nothing now */ 2500 break; 2501 } 2502 } 2503 2504 return ret; 2505 } 2506 2507 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2508 { 2509 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2510 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2511 BSS_CHANGED_QOS); 2512 } 2513 2514 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2515 { 2516 struct ieee80211_sub_if_data *sdata; 2517 2518 sdata = container_of(work, struct ieee80211_sub_if_data, 2519 u.mgd.tx_tspec_wk.work); 2520 ieee80211_sta_handle_tspec_ac_params(sdata); 2521 } 2522 2523 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2524 { 2525 struct ieee80211_sub_if_data *sdata = link->sdata; 2526 struct ieee80211_local *local = sdata->local; 2527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2528 struct ieee80211_tx_queue_params *params = link->tx_conf; 2529 u8 ac; 2530 2531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2532 mlme_dbg(sdata, 2533 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2534 ac, params[ac].acm, 2535 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2536 params[ac].txop, params[ac].uapsd, 2537 ifmgd->tx_tspec[ac].downgraded); 2538 if (!ifmgd->tx_tspec[ac].downgraded && 2539 drv_conf_tx(local, link, ac, ¶ms[ac])) 2540 link_err(link, 2541 "failed to set TX queue parameters for AC %d\n", 2542 ac); 2543 } 2544 } 2545 2546 /* MLME */ 2547 static bool 2548 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2549 struct ieee80211_link_data *link, 2550 const u8 *wmm_param, size_t wmm_param_len, 2551 const struct ieee80211_mu_edca_param_set *mu_edca) 2552 { 2553 struct ieee80211_sub_if_data *sdata = link->sdata; 2554 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2556 size_t left; 2557 int count, mu_edca_count, ac; 2558 const u8 *pos; 2559 u8 uapsd_queues = 0; 2560 2561 if (!local->ops->conf_tx) 2562 return false; 2563 2564 if (local->hw.queues < IEEE80211_NUM_ACS) 2565 return false; 2566 2567 if (!wmm_param) 2568 return false; 2569 2570 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2571 return false; 2572 2573 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2574 uapsd_queues = ifmgd->uapsd_queues; 2575 2576 count = wmm_param[6] & 0x0f; 2577 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2578 * if mu_edca was preset before and now it disappeared tell 2579 * the driver about it. 2580 */ 2581 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2582 if (count == link->u.mgd.wmm_last_param_set && 2583 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2584 return false; 2585 link->u.mgd.wmm_last_param_set = count; 2586 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2587 2588 pos = wmm_param + 8; 2589 left = wmm_param_len - 8; 2590 2591 memset(¶ms, 0, sizeof(params)); 2592 2593 sdata->wmm_acm = 0; 2594 for (; left >= 4; left -= 4, pos += 4) { 2595 int aci = (pos[0] >> 5) & 0x03; 2596 int acm = (pos[0] >> 4) & 0x01; 2597 bool uapsd = false; 2598 2599 switch (aci) { 2600 case 1: /* AC_BK */ 2601 ac = IEEE80211_AC_BK; 2602 if (acm) 2603 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2604 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2605 uapsd = true; 2606 params[ac].mu_edca = !!mu_edca; 2607 if (mu_edca) 2608 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2609 break; 2610 case 2: /* AC_VI */ 2611 ac = IEEE80211_AC_VI; 2612 if (acm) 2613 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2614 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2615 uapsd = true; 2616 params[ac].mu_edca = !!mu_edca; 2617 if (mu_edca) 2618 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2619 break; 2620 case 3: /* AC_VO */ 2621 ac = IEEE80211_AC_VO; 2622 if (acm) 2623 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2624 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2625 uapsd = true; 2626 params[ac].mu_edca = !!mu_edca; 2627 if (mu_edca) 2628 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2629 break; 2630 case 0: /* AC_BE */ 2631 default: 2632 ac = IEEE80211_AC_BE; 2633 if (acm) 2634 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2635 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2636 uapsd = true; 2637 params[ac].mu_edca = !!mu_edca; 2638 if (mu_edca) 2639 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2640 break; 2641 } 2642 2643 params[ac].aifs = pos[0] & 0x0f; 2644 2645 if (params[ac].aifs < 2) { 2646 sdata_info(sdata, 2647 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2648 params[ac].aifs, aci); 2649 params[ac].aifs = 2; 2650 } 2651 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2652 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2653 params[ac].txop = get_unaligned_le16(pos + 2); 2654 params[ac].acm = acm; 2655 params[ac].uapsd = uapsd; 2656 2657 if (params[ac].cw_min == 0 || 2658 params[ac].cw_min > params[ac].cw_max) { 2659 sdata_info(sdata, 2660 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2661 params[ac].cw_min, params[ac].cw_max, aci); 2662 return false; 2663 } 2664 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2665 } 2666 2667 /* WMM specification requires all 4 ACIs. */ 2668 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2669 if (params[ac].cw_min == 0) { 2670 sdata_info(sdata, 2671 "AP has invalid WMM params (missing AC %d), using defaults\n", 2672 ac); 2673 return false; 2674 } 2675 } 2676 2677 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2678 link->tx_conf[ac] = params[ac]; 2679 2680 ieee80211_mgd_set_link_qos_params(link); 2681 2682 /* enable WMM or activate new settings */ 2683 link->conf->qos = true; 2684 return true; 2685 } 2686 2687 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2688 { 2689 lockdep_assert_held(&sdata->local->mtx); 2690 2691 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2692 ieee80211_run_deferred_scan(sdata->local); 2693 } 2694 2695 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2696 { 2697 mutex_lock(&sdata->local->mtx); 2698 __ieee80211_stop_poll(sdata); 2699 mutex_unlock(&sdata->local->mtx); 2700 } 2701 2702 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2703 u16 capab, bool erp_valid, u8 erp) 2704 { 2705 struct ieee80211_bss_conf *bss_conf = link->conf; 2706 struct ieee80211_supported_band *sband; 2707 u32 changed = 0; 2708 bool use_protection; 2709 bool use_short_preamble; 2710 bool use_short_slot; 2711 2712 sband = ieee80211_get_link_sband(link); 2713 if (!sband) 2714 return changed; 2715 2716 if (erp_valid) { 2717 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2718 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2719 } else { 2720 use_protection = false; 2721 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2722 } 2723 2724 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2725 if (sband->band == NL80211_BAND_5GHZ || 2726 sband->band == NL80211_BAND_6GHZ) 2727 use_short_slot = true; 2728 2729 if (use_protection != bss_conf->use_cts_prot) { 2730 bss_conf->use_cts_prot = use_protection; 2731 changed |= BSS_CHANGED_ERP_CTS_PROT; 2732 } 2733 2734 if (use_short_preamble != bss_conf->use_short_preamble) { 2735 bss_conf->use_short_preamble = use_short_preamble; 2736 changed |= BSS_CHANGED_ERP_PREAMBLE; 2737 } 2738 2739 if (use_short_slot != bss_conf->use_short_slot) { 2740 bss_conf->use_short_slot = use_short_slot; 2741 changed |= BSS_CHANGED_ERP_SLOT; 2742 } 2743 2744 return changed; 2745 } 2746 2747 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2748 struct cfg80211_bss *cbss) 2749 { 2750 struct ieee80211_sub_if_data *sdata = link->sdata; 2751 struct ieee80211_bss_conf *bss_conf = link->conf; 2752 struct ieee80211_bss *bss = (void *)cbss->priv; 2753 u32 changed = BSS_CHANGED_QOS; 2754 2755 /* not really used in MLO */ 2756 sdata->u.mgd.beacon_timeout = 2757 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2758 bss_conf->beacon_int)); 2759 2760 changed |= ieee80211_handle_bss_capability(link, 2761 bss_conf->assoc_capability, 2762 bss->has_erp_value, 2763 bss->erp_value); 2764 2765 ieee80211_check_rate_mask(link); 2766 2767 link->u.mgd.bss = cbss; 2768 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2769 2770 if (sdata->vif.p2p || 2771 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2772 const struct cfg80211_bss_ies *ies; 2773 2774 rcu_read_lock(); 2775 ies = rcu_dereference(cbss->ies); 2776 if (ies) { 2777 int ret; 2778 2779 ret = cfg80211_get_p2p_attr( 2780 ies->data, ies->len, 2781 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2782 (u8 *) &bss_conf->p2p_noa_attr, 2783 sizeof(bss_conf->p2p_noa_attr)); 2784 if (ret >= 2) { 2785 link->u.mgd.p2p_noa_index = 2786 bss_conf->p2p_noa_attr.index; 2787 changed |= BSS_CHANGED_P2P_PS; 2788 } 2789 } 2790 rcu_read_unlock(); 2791 } 2792 2793 if (link->u.mgd.have_beacon) { 2794 bss_conf->beacon_rate = bss->beacon_rate; 2795 changed |= BSS_CHANGED_BEACON_INFO; 2796 } else { 2797 bss_conf->beacon_rate = NULL; 2798 } 2799 2800 /* Tell the driver to monitor connection quality (if supported) */ 2801 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2802 bss_conf->cqm_rssi_thold) 2803 changed |= BSS_CHANGED_CQM; 2804 2805 return changed; 2806 } 2807 2808 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2809 struct ieee80211_mgd_assoc_data *assoc_data, 2810 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2811 { 2812 struct ieee80211_local *local = sdata->local; 2813 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2814 u64 vif_changed = BSS_CHANGED_ASSOC; 2815 unsigned int link_id; 2816 2817 sdata->u.mgd.associated = true; 2818 2819 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2820 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2821 struct ieee80211_link_data *link; 2822 2823 if (!cbss || 2824 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2825 continue; 2826 2827 link = sdata_dereference(sdata->link[link_id], sdata); 2828 if (WARN_ON(!link)) 2829 return; 2830 2831 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2832 } 2833 2834 /* just to be sure */ 2835 ieee80211_stop_poll(sdata); 2836 2837 ieee80211_led_assoc(local, 1); 2838 2839 vif_cfg->assoc = 1; 2840 2841 /* Enable ARP filtering */ 2842 if (vif_cfg->arp_addr_cnt) 2843 vif_changed |= BSS_CHANGED_ARP_FILTER; 2844 2845 if (sdata->vif.valid_links) { 2846 for (link_id = 0; 2847 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2848 link_id++) { 2849 struct ieee80211_link_data *link; 2850 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2851 2852 if (!cbss || 2853 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2854 continue; 2855 2856 link = sdata_dereference(sdata->link[link_id], sdata); 2857 if (WARN_ON(!link)) 2858 return; 2859 2860 ieee80211_link_info_change_notify(sdata, link, 2861 changed[link_id]); 2862 2863 ieee80211_recalc_smps(sdata, link); 2864 } 2865 2866 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2867 } else { 2868 ieee80211_bss_info_change_notify(sdata, 2869 vif_changed | changed[0]); 2870 } 2871 2872 mutex_lock(&local->iflist_mtx); 2873 ieee80211_recalc_ps(local); 2874 mutex_unlock(&local->iflist_mtx); 2875 2876 /* leave this here to not change ordering in non-MLO cases */ 2877 if (!sdata->vif.valid_links) 2878 ieee80211_recalc_smps(sdata, &sdata->deflink); 2879 ieee80211_recalc_ps_vif(sdata); 2880 2881 netif_carrier_on(sdata->dev); 2882 } 2883 2884 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2885 u16 stype, u16 reason, bool tx, 2886 u8 *frame_buf) 2887 { 2888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2889 struct ieee80211_local *local = sdata->local; 2890 unsigned int link_id; 2891 u32 changed = 0; 2892 struct ieee80211_prep_tx_info info = { 2893 .subtype = stype, 2894 }; 2895 2896 sdata_assert_lock(sdata); 2897 2898 if (WARN_ON_ONCE(tx && !frame_buf)) 2899 return; 2900 2901 if (WARN_ON(!ifmgd->associated)) 2902 return; 2903 2904 ieee80211_stop_poll(sdata); 2905 2906 ifmgd->associated = false; 2907 2908 /* other links will be destroyed */ 2909 sdata->deflink.u.mgd.bss = NULL; 2910 2911 netif_carrier_off(sdata->dev); 2912 2913 /* 2914 * if we want to get out of ps before disassoc (why?) we have 2915 * to do it before sending disassoc, as otherwise the null-packet 2916 * won't be valid. 2917 */ 2918 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2919 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2920 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2921 } 2922 local->ps_sdata = NULL; 2923 2924 /* disable per-vif ps */ 2925 ieee80211_recalc_ps_vif(sdata); 2926 2927 /* make sure ongoing transmission finishes */ 2928 synchronize_net(); 2929 2930 /* 2931 * drop any frame before deauth/disassoc, this can be data or 2932 * management frame. Since we are disconnecting, we should not 2933 * insist sending these frames which can take time and delay 2934 * the disconnection and possible the roaming. 2935 */ 2936 if (tx) 2937 ieee80211_flush_queues(local, sdata, true); 2938 2939 /* deauthenticate/disassociate now */ 2940 if (tx || frame_buf) { 2941 /* 2942 * In multi channel scenarios guarantee that the virtual 2943 * interface is granted immediate airtime to transmit the 2944 * deauthentication frame by calling mgd_prepare_tx, if the 2945 * driver requested so. 2946 */ 2947 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2948 !sdata->deflink.u.mgd.have_beacon) { 2949 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2950 } 2951 2952 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2953 sdata->vif.cfg.ap_addr, stype, 2954 reason, tx, frame_buf); 2955 } 2956 2957 /* flush out frame - make sure the deauth was actually sent */ 2958 if (tx) 2959 ieee80211_flush_queues(local, sdata, false); 2960 2961 drv_mgd_complete_tx(sdata->local, sdata, &info); 2962 2963 /* clear AP addr only after building the needed mgmt frames */ 2964 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2965 eth_zero_addr(sdata->vif.cfg.ap_addr); 2966 2967 sdata->vif.cfg.ssid_len = 0; 2968 2969 /* remove AP and TDLS peers */ 2970 sta_info_flush(sdata); 2971 2972 /* finally reset all BSS / config parameters */ 2973 if (!sdata->vif.valid_links) 2974 changed |= ieee80211_reset_erp_info(sdata); 2975 2976 ieee80211_led_assoc(local, 0); 2977 changed |= BSS_CHANGED_ASSOC; 2978 sdata->vif.cfg.assoc = false; 2979 2980 sdata->deflink.u.mgd.p2p_noa_index = -1; 2981 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2982 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2983 2984 /* on the next assoc, re-program HT/VHT parameters */ 2985 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2986 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2987 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2988 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2989 2990 /* 2991 * reset MU-MIMO ownership and group data in default link, 2992 * if used, other links are destroyed 2993 */ 2994 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2995 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2996 memset(sdata->vif.bss_conf.mu_group.position, 0, 2997 sizeof(sdata->vif.bss_conf.mu_group.position)); 2998 if (!sdata->vif.valid_links) 2999 changed |= BSS_CHANGED_MU_GROUPS; 3000 sdata->vif.bss_conf.mu_mimo_owner = false; 3001 3002 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3003 3004 del_timer_sync(&local->dynamic_ps_timer); 3005 cancel_work_sync(&local->dynamic_ps_enable_work); 3006 3007 /* Disable ARP filtering */ 3008 if (sdata->vif.cfg.arp_addr_cnt) 3009 changed |= BSS_CHANGED_ARP_FILTER; 3010 3011 sdata->vif.bss_conf.qos = false; 3012 if (!sdata->vif.valid_links) { 3013 changed |= BSS_CHANGED_QOS; 3014 /* The BSSID (not really interesting) and HT changed */ 3015 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3016 ieee80211_bss_info_change_notify(sdata, changed); 3017 } else { 3018 ieee80211_vif_cfg_change_notify(sdata, changed); 3019 } 3020 3021 /* disassociated - set to defaults now */ 3022 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3023 3024 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3025 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3026 del_timer_sync(&sdata->u.mgd.timer); 3027 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 3028 3029 sdata->vif.bss_conf.dtim_period = 0; 3030 sdata->vif.bss_conf.beacon_rate = NULL; 3031 3032 sdata->deflink.u.mgd.have_beacon = false; 3033 sdata->deflink.u.mgd.tracking_signal_avg = false; 3034 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3035 3036 ifmgd->flags = 0; 3037 sdata->deflink.u.mgd.conn_flags = 0; 3038 mutex_lock(&local->mtx); 3039 3040 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3041 struct ieee80211_link_data *link; 3042 3043 link = sdata_dereference(sdata->link[link_id], sdata); 3044 if (!link) 3045 continue; 3046 ieee80211_link_release_channel(link); 3047 } 3048 3049 sdata->vif.bss_conf.csa_active = false; 3050 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3051 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3052 if (sdata->deflink.csa_block_tx) { 3053 ieee80211_wake_vif_queues(local, sdata, 3054 IEEE80211_QUEUE_STOP_REASON_CSA); 3055 sdata->deflink.csa_block_tx = false; 3056 } 3057 mutex_unlock(&local->mtx); 3058 3059 /* existing TX TSPEC sessions no longer exist */ 3060 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3061 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3062 3063 sdata->vif.bss_conf.pwr_reduction = 0; 3064 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3065 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3066 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3067 3068 ieee80211_vif_set_links(sdata, 0); 3069 } 3070 3071 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3072 { 3073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3074 struct ieee80211_local *local = sdata->local; 3075 3076 mutex_lock(&local->mtx); 3077 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3078 goto out; 3079 3080 __ieee80211_stop_poll(sdata); 3081 3082 mutex_lock(&local->iflist_mtx); 3083 ieee80211_recalc_ps(local); 3084 mutex_unlock(&local->iflist_mtx); 3085 3086 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3087 goto out; 3088 3089 /* 3090 * We've received a probe response, but are not sure whether 3091 * we have or will be receiving any beacons or data, so let's 3092 * schedule the timers again, just in case. 3093 */ 3094 ieee80211_sta_reset_beacon_monitor(sdata); 3095 3096 mod_timer(&ifmgd->conn_mon_timer, 3097 round_jiffies_up(jiffies + 3098 IEEE80211_CONNECTION_IDLE_TIME)); 3099 out: 3100 mutex_unlock(&local->mtx); 3101 } 3102 3103 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3104 struct ieee80211_hdr *hdr, 3105 u16 tx_time) 3106 { 3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3108 u16 tid; 3109 int ac; 3110 struct ieee80211_sta_tx_tspec *tx_tspec; 3111 unsigned long now = jiffies; 3112 3113 if (!ieee80211_is_data_qos(hdr->frame_control)) 3114 return; 3115 3116 tid = ieee80211_get_tid(hdr); 3117 ac = ieee80211_ac_from_tid(tid); 3118 tx_tspec = &ifmgd->tx_tspec[ac]; 3119 3120 if (likely(!tx_tspec->admitted_time)) 3121 return; 3122 3123 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3124 tx_tspec->consumed_tx_time = 0; 3125 tx_tspec->time_slice_start = now; 3126 3127 if (tx_tspec->downgraded) { 3128 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3129 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3130 } 3131 } 3132 3133 if (tx_tspec->downgraded) 3134 return; 3135 3136 tx_tspec->consumed_tx_time += tx_time; 3137 3138 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3139 tx_tspec->downgraded = true; 3140 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3141 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3142 } 3143 } 3144 3145 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3146 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3147 { 3148 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3149 3150 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3151 !sdata->u.mgd.probe_send_count) 3152 return; 3153 3154 if (ack) 3155 sdata->u.mgd.probe_send_count = 0; 3156 else 3157 sdata->u.mgd.nullfunc_failed = true; 3158 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3159 } 3160 3161 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3162 const u8 *src, const u8 *dst, 3163 const u8 *ssid, size_t ssid_len, 3164 struct ieee80211_channel *channel) 3165 { 3166 struct sk_buff *skb; 3167 3168 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3169 ssid, ssid_len, NULL, 0, 3170 IEEE80211_PROBE_FLAG_DIRECTED); 3171 if (skb) 3172 ieee80211_tx_skb(sdata, skb); 3173 } 3174 3175 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3176 { 3177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3178 u8 *dst = sdata->vif.cfg.ap_addr; 3179 u8 unicast_limit = max(1, max_probe_tries - 3); 3180 struct sta_info *sta; 3181 3182 if (WARN_ON(sdata->vif.valid_links)) 3183 return; 3184 3185 /* 3186 * Try sending broadcast probe requests for the last three 3187 * probe requests after the first ones failed since some 3188 * buggy APs only support broadcast probe requests. 3189 */ 3190 if (ifmgd->probe_send_count >= unicast_limit) 3191 dst = NULL; 3192 3193 /* 3194 * When the hardware reports an accurate Tx ACK status, it's 3195 * better to send a nullfunc frame instead of a probe request, 3196 * as it will kick us off the AP quickly if we aren't associated 3197 * anymore. The timeout will be reset if the frame is ACKed by 3198 * the AP. 3199 */ 3200 ifmgd->probe_send_count++; 3201 3202 if (dst) { 3203 mutex_lock(&sdata->local->sta_mtx); 3204 sta = sta_info_get(sdata, dst); 3205 if (!WARN_ON(!sta)) 3206 ieee80211_check_fast_rx(sta); 3207 mutex_unlock(&sdata->local->sta_mtx); 3208 } 3209 3210 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3211 ifmgd->nullfunc_failed = false; 3212 ieee80211_send_nullfunc(sdata->local, sdata, false); 3213 } else { 3214 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3215 sdata->vif.cfg.ssid, 3216 sdata->vif.cfg.ssid_len, 3217 sdata->deflink.u.mgd.bss->channel); 3218 } 3219 3220 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3221 run_again(sdata, ifmgd->probe_timeout); 3222 } 3223 3224 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3225 bool beacon) 3226 { 3227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3228 bool already = false; 3229 3230 if (WARN_ON_ONCE(sdata->vif.valid_links)) 3231 return; 3232 3233 if (!ieee80211_sdata_running(sdata)) 3234 return; 3235 3236 sdata_lock(sdata); 3237 3238 if (!ifmgd->associated) 3239 goto out; 3240 3241 mutex_lock(&sdata->local->mtx); 3242 3243 if (sdata->local->tmp_channel || sdata->local->scanning) { 3244 mutex_unlock(&sdata->local->mtx); 3245 goto out; 3246 } 3247 3248 if (sdata->local->suspending) { 3249 /* reschedule after resume */ 3250 mutex_unlock(&sdata->local->mtx); 3251 ieee80211_reset_ap_probe(sdata); 3252 goto out; 3253 } 3254 3255 if (beacon) { 3256 mlme_dbg_ratelimited(sdata, 3257 "detected beacon loss from AP (missed %d beacons) - probing\n", 3258 beacon_loss_count); 3259 3260 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3261 } 3262 3263 /* 3264 * The driver/our work has already reported this event or the 3265 * connection monitoring has kicked in and we have already sent 3266 * a probe request. Or maybe the AP died and the driver keeps 3267 * reporting until we disassociate... 3268 * 3269 * In either case we have to ignore the current call to this 3270 * function (except for setting the correct probe reason bit) 3271 * because otherwise we would reset the timer every time and 3272 * never check whether we received a probe response! 3273 */ 3274 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3275 already = true; 3276 3277 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3278 3279 mutex_unlock(&sdata->local->mtx); 3280 3281 if (already) 3282 goto out; 3283 3284 mutex_lock(&sdata->local->iflist_mtx); 3285 ieee80211_recalc_ps(sdata->local); 3286 mutex_unlock(&sdata->local->iflist_mtx); 3287 3288 ifmgd->probe_send_count = 0; 3289 ieee80211_mgd_probe_ap_send(sdata); 3290 out: 3291 sdata_unlock(sdata); 3292 } 3293 3294 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3295 struct ieee80211_vif *vif) 3296 { 3297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3299 struct cfg80211_bss *cbss; 3300 struct sk_buff *skb; 3301 const struct element *ssid; 3302 int ssid_len; 3303 3304 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3305 sdata->vif.valid_links)) 3306 return NULL; 3307 3308 sdata_assert_lock(sdata); 3309 3310 if (ifmgd->associated) 3311 cbss = sdata->deflink.u.mgd.bss; 3312 else if (ifmgd->auth_data) 3313 cbss = ifmgd->auth_data->bss; 3314 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3315 cbss = ifmgd->assoc_data->link[0].bss; 3316 else 3317 return NULL; 3318 3319 rcu_read_lock(); 3320 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3321 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3322 "invalid SSID element (len=%d)", 3323 ssid ? ssid->datalen : -1)) 3324 ssid_len = 0; 3325 else 3326 ssid_len = ssid->datalen; 3327 3328 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3329 (u32) -1, cbss->channel, 3330 ssid->data, ssid_len, 3331 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3332 rcu_read_unlock(); 3333 3334 return skb; 3335 } 3336 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3337 3338 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3339 const u8 *buf, size_t len, bool tx, 3340 u16 reason, bool reconnect) 3341 { 3342 struct ieee80211_event event = { 3343 .type = MLME_EVENT, 3344 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3345 .u.mlme.reason = reason, 3346 }; 3347 3348 if (tx) 3349 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3350 else 3351 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3352 3353 drv_event_callback(sdata->local, sdata, &event); 3354 } 3355 3356 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3357 { 3358 struct ieee80211_local *local = sdata->local; 3359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3360 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3361 bool tx; 3362 3363 sdata_lock(sdata); 3364 if (!ifmgd->associated) { 3365 sdata_unlock(sdata); 3366 return; 3367 } 3368 3369 /* in MLO assume we have a link where we can TX the frame */ 3370 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3371 3372 if (!ifmgd->driver_disconnect) { 3373 unsigned int link_id; 3374 3375 /* 3376 * AP is probably out of range (or not reachable for another 3377 * reason) so remove the bss structs for that AP. In the case 3378 * of multi-link, it's not clear that all of them really are 3379 * out of range, but if they weren't the driver likely would 3380 * have switched to just have a single link active? 3381 */ 3382 for (link_id = 0; 3383 link_id < ARRAY_SIZE(sdata->link); 3384 link_id++) { 3385 struct ieee80211_link_data *link; 3386 3387 link = sdata_dereference(sdata->link[link_id], sdata); 3388 if (!link) 3389 continue; 3390 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3391 link->u.mgd.bss = NULL; 3392 } 3393 } 3394 3395 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3396 ifmgd->driver_disconnect ? 3397 WLAN_REASON_DEAUTH_LEAVING : 3398 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3399 tx, frame_buf); 3400 mutex_lock(&local->mtx); 3401 /* the other links will be destroyed */ 3402 sdata->vif.bss_conf.csa_active = false; 3403 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3404 if (sdata->deflink.csa_block_tx) { 3405 ieee80211_wake_vif_queues(local, sdata, 3406 IEEE80211_QUEUE_STOP_REASON_CSA); 3407 sdata->deflink.csa_block_tx = false; 3408 } 3409 mutex_unlock(&local->mtx); 3410 3411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3413 ifmgd->reconnect); 3414 ifmgd->reconnect = false; 3415 3416 sdata_unlock(sdata); 3417 } 3418 3419 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3420 { 3421 struct ieee80211_sub_if_data *sdata = 3422 container_of(work, struct ieee80211_sub_if_data, 3423 u.mgd.beacon_connection_loss_work); 3424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3425 3426 if (ifmgd->connection_loss) { 3427 sdata_info(sdata, "Connection to AP %pM lost\n", 3428 sdata->vif.cfg.ap_addr); 3429 __ieee80211_disconnect(sdata); 3430 ifmgd->connection_loss = false; 3431 } else if (ifmgd->driver_disconnect) { 3432 sdata_info(sdata, 3433 "Driver requested disconnection from AP %pM\n", 3434 sdata->vif.cfg.ap_addr); 3435 __ieee80211_disconnect(sdata); 3436 ifmgd->driver_disconnect = false; 3437 } else { 3438 if (ifmgd->associated) 3439 sdata->deflink.u.mgd.beacon_loss_count++; 3440 ieee80211_mgd_probe_ap(sdata, true); 3441 } 3442 } 3443 3444 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3445 { 3446 struct ieee80211_sub_if_data *sdata = 3447 container_of(work, struct ieee80211_sub_if_data, 3448 u.mgd.csa_connection_drop_work); 3449 3450 __ieee80211_disconnect(sdata); 3451 } 3452 3453 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3454 { 3455 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3456 struct ieee80211_hw *hw = &sdata->local->hw; 3457 3458 trace_api_beacon_loss(sdata); 3459 3460 sdata->u.mgd.connection_loss = false; 3461 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3462 } 3463 EXPORT_SYMBOL(ieee80211_beacon_loss); 3464 3465 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3466 { 3467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3468 struct ieee80211_hw *hw = &sdata->local->hw; 3469 3470 trace_api_connection_loss(sdata); 3471 3472 sdata->u.mgd.connection_loss = true; 3473 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3474 } 3475 EXPORT_SYMBOL(ieee80211_connection_loss); 3476 3477 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3478 { 3479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3480 struct ieee80211_hw *hw = &sdata->local->hw; 3481 3482 trace_api_disconnect(sdata, reconnect); 3483 3484 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3485 return; 3486 3487 sdata->u.mgd.driver_disconnect = true; 3488 sdata->u.mgd.reconnect = reconnect; 3489 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3490 } 3491 EXPORT_SYMBOL(ieee80211_disconnect); 3492 3493 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3494 bool assoc) 3495 { 3496 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3497 3498 sdata_assert_lock(sdata); 3499 3500 if (!assoc) { 3501 /* 3502 * we are not authenticated yet, the only timer that could be 3503 * running is the timeout for the authentication response which 3504 * which is not relevant anymore. 3505 */ 3506 del_timer_sync(&sdata->u.mgd.timer); 3507 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3508 3509 /* other links are destroyed */ 3510 sdata->deflink.u.mgd.conn_flags = 0; 3511 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3512 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3513 BSS_CHANGED_BSSID); 3514 sdata->u.mgd.flags = 0; 3515 3516 mutex_lock(&sdata->local->mtx); 3517 ieee80211_link_release_channel(&sdata->deflink); 3518 ieee80211_vif_set_links(sdata, 0); 3519 mutex_unlock(&sdata->local->mtx); 3520 } 3521 3522 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3523 kfree(auth_data); 3524 sdata->u.mgd.auth_data = NULL; 3525 } 3526 3527 enum assoc_status { 3528 ASSOC_SUCCESS, 3529 ASSOC_REJECTED, 3530 ASSOC_TIMEOUT, 3531 ASSOC_ABANDON, 3532 }; 3533 3534 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3535 enum assoc_status status) 3536 { 3537 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3538 3539 sdata_assert_lock(sdata); 3540 3541 if (status != ASSOC_SUCCESS) { 3542 /* 3543 * we are not associated yet, the only timer that could be 3544 * running is the timeout for the association response which 3545 * which is not relevant anymore. 3546 */ 3547 del_timer_sync(&sdata->u.mgd.timer); 3548 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3549 3550 sdata->deflink.u.mgd.conn_flags = 0; 3551 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3552 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3553 BSS_CHANGED_BSSID); 3554 sdata->u.mgd.flags = 0; 3555 sdata->vif.bss_conf.mu_mimo_owner = false; 3556 3557 if (status != ASSOC_REJECTED) { 3558 struct cfg80211_assoc_failure data = { 3559 .timeout = status == ASSOC_TIMEOUT, 3560 }; 3561 int i; 3562 3563 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3564 ARRAY_SIZE(assoc_data->link)); 3565 3566 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3567 data.bss[i] = assoc_data->link[i].bss; 3568 3569 if (sdata->vif.valid_links) 3570 data.ap_mld_addr = assoc_data->ap_addr; 3571 3572 cfg80211_assoc_failure(sdata->dev, &data); 3573 } 3574 3575 mutex_lock(&sdata->local->mtx); 3576 ieee80211_link_release_channel(&sdata->deflink); 3577 ieee80211_vif_set_links(sdata, 0); 3578 mutex_unlock(&sdata->local->mtx); 3579 } 3580 3581 kfree(assoc_data); 3582 sdata->u.mgd.assoc_data = NULL; 3583 } 3584 3585 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3586 struct ieee80211_mgmt *mgmt, size_t len) 3587 { 3588 struct ieee80211_local *local = sdata->local; 3589 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3590 const struct element *challenge; 3591 u8 *pos; 3592 u32 tx_flags = 0; 3593 struct ieee80211_prep_tx_info info = { 3594 .subtype = IEEE80211_STYPE_AUTH, 3595 }; 3596 3597 pos = mgmt->u.auth.variable; 3598 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3599 len - (pos - (u8 *)mgmt)); 3600 if (!challenge) 3601 return; 3602 auth_data->expected_transaction = 4; 3603 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3604 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3605 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3606 IEEE80211_TX_INTFL_MLME_CONN_TX; 3607 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3608 (void *)challenge, 3609 challenge->datalen + sizeof(*challenge), 3610 auth_data->ap_addr, auth_data->ap_addr, 3611 auth_data->key, auth_data->key_len, 3612 auth_data->key_idx, tx_flags); 3613 } 3614 3615 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3616 { 3617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3618 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3619 struct sta_info *sta; 3620 bool result = true; 3621 3622 sdata_info(sdata, "authenticated\n"); 3623 ifmgd->auth_data->done = true; 3624 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3625 ifmgd->auth_data->timeout_started = true; 3626 run_again(sdata, ifmgd->auth_data->timeout); 3627 3628 /* move station state to auth */ 3629 mutex_lock(&sdata->local->sta_mtx); 3630 sta = sta_info_get(sdata, ap_addr); 3631 if (!sta) { 3632 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3633 result = false; 3634 goto out; 3635 } 3636 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3637 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3638 result = false; 3639 goto out; 3640 } 3641 3642 out: 3643 mutex_unlock(&sdata->local->sta_mtx); 3644 return result; 3645 } 3646 3647 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3648 struct ieee80211_mgmt *mgmt, size_t len) 3649 { 3650 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3651 u16 auth_alg, auth_transaction, status_code; 3652 struct ieee80211_event event = { 3653 .type = MLME_EVENT, 3654 .u.mlme.data = AUTH_EVENT, 3655 }; 3656 struct ieee80211_prep_tx_info info = { 3657 .subtype = IEEE80211_STYPE_AUTH, 3658 }; 3659 3660 sdata_assert_lock(sdata); 3661 3662 if (len < 24 + 6) 3663 return; 3664 3665 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3666 return; 3667 3668 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3669 return; 3670 3671 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3672 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3673 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3674 3675 if (auth_alg != ifmgd->auth_data->algorithm || 3676 (auth_alg != WLAN_AUTH_SAE && 3677 auth_transaction != ifmgd->auth_data->expected_transaction) || 3678 (auth_alg == WLAN_AUTH_SAE && 3679 (auth_transaction < ifmgd->auth_data->expected_transaction || 3680 auth_transaction > 2))) { 3681 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3682 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3683 auth_transaction, 3684 ifmgd->auth_data->expected_transaction); 3685 goto notify_driver; 3686 } 3687 3688 if (status_code != WLAN_STATUS_SUCCESS) { 3689 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3690 3691 if (auth_alg == WLAN_AUTH_SAE && 3692 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3693 (auth_transaction == 1 && 3694 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3695 status_code == WLAN_STATUS_SAE_PK)))) { 3696 /* waiting for userspace now */ 3697 ifmgd->auth_data->waiting = true; 3698 ifmgd->auth_data->timeout = 3699 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3700 ifmgd->auth_data->timeout_started = true; 3701 run_again(sdata, ifmgd->auth_data->timeout); 3702 goto notify_driver; 3703 } 3704 3705 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3706 mgmt->sa, status_code); 3707 ieee80211_destroy_auth_data(sdata, false); 3708 event.u.mlme.status = MLME_DENIED; 3709 event.u.mlme.reason = status_code; 3710 drv_event_callback(sdata->local, sdata, &event); 3711 goto notify_driver; 3712 } 3713 3714 switch (ifmgd->auth_data->algorithm) { 3715 case WLAN_AUTH_OPEN: 3716 case WLAN_AUTH_LEAP: 3717 case WLAN_AUTH_FT: 3718 case WLAN_AUTH_SAE: 3719 case WLAN_AUTH_FILS_SK: 3720 case WLAN_AUTH_FILS_SK_PFS: 3721 case WLAN_AUTH_FILS_PK: 3722 break; 3723 case WLAN_AUTH_SHARED_KEY: 3724 if (ifmgd->auth_data->expected_transaction != 4) { 3725 ieee80211_auth_challenge(sdata, mgmt, len); 3726 /* need another frame */ 3727 return; 3728 } 3729 break; 3730 default: 3731 WARN_ONCE(1, "invalid auth alg %d", 3732 ifmgd->auth_data->algorithm); 3733 goto notify_driver; 3734 } 3735 3736 event.u.mlme.status = MLME_SUCCESS; 3737 info.success = 1; 3738 drv_event_callback(sdata->local, sdata, &event); 3739 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3740 (auth_transaction == 2 && 3741 ifmgd->auth_data->expected_transaction == 2)) { 3742 if (!ieee80211_mark_sta_auth(sdata)) 3743 return; /* ignore frame -- wait for timeout */ 3744 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3745 auth_transaction == 2) { 3746 sdata_info(sdata, "SAE peer confirmed\n"); 3747 ifmgd->auth_data->peer_confirmed = true; 3748 } 3749 3750 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3751 notify_driver: 3752 drv_mgd_complete_tx(sdata->local, sdata, &info); 3753 } 3754 3755 #define case_WLAN(type) \ 3756 case WLAN_REASON_##type: return #type 3757 3758 const char *ieee80211_get_reason_code_string(u16 reason_code) 3759 { 3760 switch (reason_code) { 3761 case_WLAN(UNSPECIFIED); 3762 case_WLAN(PREV_AUTH_NOT_VALID); 3763 case_WLAN(DEAUTH_LEAVING); 3764 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3765 case_WLAN(DISASSOC_AP_BUSY); 3766 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3767 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3768 case_WLAN(DISASSOC_STA_HAS_LEFT); 3769 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3770 case_WLAN(DISASSOC_BAD_POWER); 3771 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3772 case_WLAN(INVALID_IE); 3773 case_WLAN(MIC_FAILURE); 3774 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3775 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3776 case_WLAN(IE_DIFFERENT); 3777 case_WLAN(INVALID_GROUP_CIPHER); 3778 case_WLAN(INVALID_PAIRWISE_CIPHER); 3779 case_WLAN(INVALID_AKMP); 3780 case_WLAN(UNSUPP_RSN_VERSION); 3781 case_WLAN(INVALID_RSN_IE_CAP); 3782 case_WLAN(IEEE8021X_FAILED); 3783 case_WLAN(CIPHER_SUITE_REJECTED); 3784 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3785 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3786 case_WLAN(DISASSOC_LOW_ACK); 3787 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3788 case_WLAN(QSTA_LEAVE_QBSS); 3789 case_WLAN(QSTA_NOT_USE); 3790 case_WLAN(QSTA_REQUIRE_SETUP); 3791 case_WLAN(QSTA_TIMEOUT); 3792 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3793 case_WLAN(MESH_PEER_CANCELED); 3794 case_WLAN(MESH_MAX_PEERS); 3795 case_WLAN(MESH_CONFIG); 3796 case_WLAN(MESH_CLOSE); 3797 case_WLAN(MESH_MAX_RETRIES); 3798 case_WLAN(MESH_CONFIRM_TIMEOUT); 3799 case_WLAN(MESH_INVALID_GTK); 3800 case_WLAN(MESH_INCONSISTENT_PARAM); 3801 case_WLAN(MESH_INVALID_SECURITY); 3802 case_WLAN(MESH_PATH_ERROR); 3803 case_WLAN(MESH_PATH_NOFORWARD); 3804 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3805 case_WLAN(MAC_EXISTS_IN_MBSS); 3806 case_WLAN(MESH_CHAN_REGULATORY); 3807 case_WLAN(MESH_CHAN); 3808 default: return "<unknown>"; 3809 } 3810 } 3811 3812 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3813 struct ieee80211_mgmt *mgmt, size_t len) 3814 { 3815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3816 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3817 3818 sdata_assert_lock(sdata); 3819 3820 if (len < 24 + 2) 3821 return; 3822 3823 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3824 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3825 return; 3826 } 3827 3828 if (ifmgd->associated && 3829 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3830 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3831 sdata->vif.cfg.ap_addr, reason_code, 3832 ieee80211_get_reason_code_string(reason_code)); 3833 3834 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3835 3836 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3837 reason_code, false); 3838 return; 3839 } 3840 3841 if (ifmgd->assoc_data && 3842 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3843 sdata_info(sdata, 3844 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3845 ifmgd->assoc_data->ap_addr, reason_code, 3846 ieee80211_get_reason_code_string(reason_code)); 3847 3848 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3849 3850 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3851 return; 3852 } 3853 } 3854 3855 3856 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3857 struct ieee80211_mgmt *mgmt, size_t len) 3858 { 3859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3860 u16 reason_code; 3861 3862 sdata_assert_lock(sdata); 3863 3864 if (len < 24 + 2) 3865 return; 3866 3867 if (!ifmgd->associated || 3868 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3869 return; 3870 3871 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3872 3873 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3874 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3875 return; 3876 } 3877 3878 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3879 sdata->vif.cfg.ap_addr, reason_code, 3880 ieee80211_get_reason_code_string(reason_code)); 3881 3882 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3883 3884 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3885 false); 3886 } 3887 3888 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3889 u8 *supp_rates, unsigned int supp_rates_len, 3890 u32 *rates, u32 *basic_rates, 3891 bool *have_higher_than_11mbit, 3892 int *min_rate, int *min_rate_index, 3893 int shift) 3894 { 3895 int i, j; 3896 3897 for (i = 0; i < supp_rates_len; i++) { 3898 int rate = supp_rates[i] & 0x7f; 3899 bool is_basic = !!(supp_rates[i] & 0x80); 3900 3901 if ((rate * 5 * (1 << shift)) > 110) 3902 *have_higher_than_11mbit = true; 3903 3904 /* 3905 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3906 * since they're not rates. 3907 * 3908 * Note: Even though the membership selector and the basic 3909 * rate flag share the same bit, they are not exactly 3910 * the same. 3911 */ 3912 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3913 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3914 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3915 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3916 continue; 3917 3918 for (j = 0; j < sband->n_bitrates; j++) { 3919 struct ieee80211_rate *br; 3920 int brate; 3921 3922 br = &sband->bitrates[j]; 3923 3924 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3925 if (brate == rate) { 3926 *rates |= BIT(j); 3927 if (is_basic) 3928 *basic_rates |= BIT(j); 3929 if ((rate * 5) < *min_rate) { 3930 *min_rate = rate * 5; 3931 *min_rate_index = j; 3932 } 3933 break; 3934 } 3935 } 3936 } 3937 } 3938 3939 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3940 struct ieee80211_supported_band *sband, 3941 const struct link_sta_info *link_sta, 3942 const struct ieee802_11_elems *elems) 3943 { 3944 const struct ieee80211_sta_he_cap *own_he_cap = 3945 ieee80211_get_he_iftype_cap(sband, 3946 ieee80211_vif_type_p2p(&sdata->vif)); 3947 3948 if (elems->ext_capab_len < 10) 3949 return false; 3950 3951 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3952 return false; 3953 3954 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3955 IEEE80211_HE_MAC_CAP0_TWT_RES && 3956 own_he_cap && 3957 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3958 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3959 } 3960 3961 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3962 struct ieee80211_supported_band *sband, 3963 struct ieee80211_link_data *link, 3964 struct link_sta_info *link_sta, 3965 struct ieee802_11_elems *elems) 3966 { 3967 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3968 3969 if (link->conf->twt_requester != twt) { 3970 link->conf->twt_requester = twt; 3971 return BSS_CHANGED_TWT; 3972 } 3973 return 0; 3974 } 3975 3976 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3977 struct ieee80211_bss_conf *bss_conf, 3978 struct ieee80211_supported_band *sband, 3979 struct link_sta_info *link_sta) 3980 { 3981 const struct ieee80211_sta_he_cap *own_he_cap = 3982 ieee80211_get_he_iftype_cap(sband, 3983 ieee80211_vif_type_p2p(&sdata->vif)); 3984 3985 return bss_conf->he_support && 3986 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3987 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3988 own_he_cap && 3989 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3990 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3991 } 3992 3993 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3994 struct link_sta_info *link_sta, 3995 struct cfg80211_bss *cbss, 3996 struct ieee80211_mgmt *mgmt, 3997 const u8 *elem_start, 3998 unsigned int elem_len, 3999 u64 *changed) 4000 { 4001 struct ieee80211_sub_if_data *sdata = link->sdata; 4002 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4003 struct ieee80211_bss_conf *bss_conf = link->conf; 4004 struct ieee80211_local *local = sdata->local; 4005 unsigned int link_id = link->link_id; 4006 struct ieee80211_elems_parse_params parse_params = { 4007 .start = elem_start, 4008 .len = elem_len, 4009 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4010 .from_ap = true, 4011 }; 4012 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4013 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4014 const struct cfg80211_bss_ies *bss_ies = NULL; 4015 struct ieee80211_supported_band *sband; 4016 struct ieee802_11_elems *elems; 4017 u16 capab_info; 4018 bool ret; 4019 4020 elems = ieee802_11_parse_elems_full(&parse_params); 4021 if (!elems) 4022 return false; 4023 4024 if (link_id == assoc_data->assoc_link_id) { 4025 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4026 4027 /* 4028 * we should not get to this flow unless the association was 4029 * successful, so set the status directly to success 4030 */ 4031 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4032 } else if (!elems->prof) { 4033 ret = false; 4034 goto out; 4035 } else { 4036 const u8 *ptr = elems->prof->variable + 4037 elems->prof->sta_info_len - 1; 4038 4039 /* 4040 * During parsing, we validated that these fields exist, 4041 * otherwise elems->prof would have been set to NULL. 4042 */ 4043 capab_info = get_unaligned_le16(ptr); 4044 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4045 4046 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4047 link_info(link, "association response status code=%u\n", 4048 assoc_data->link[link_id].status); 4049 ret = true; 4050 goto out; 4051 } 4052 } 4053 4054 if (!is_s1g && !elems->supp_rates) { 4055 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4056 ret = false; 4057 goto out; 4058 } 4059 4060 link->u.mgd.tdls_chan_switch_prohibited = 4061 elems->ext_capab && elems->ext_capab_len >= 5 && 4062 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4063 4064 /* 4065 * Some APs are erroneously not including some information in their 4066 * (re)association response frames. Try to recover by using the data 4067 * from the beacon or probe response. This seems to afflict mobile 4068 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4069 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4070 */ 4071 if (!is_6ghz && 4072 ((assoc_data->wmm && !elems->wmm_param) || 4073 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4074 (!elems->ht_cap_elem || !elems->ht_operation)) || 4075 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4076 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4077 const struct cfg80211_bss_ies *ies; 4078 struct ieee802_11_elems *bss_elems; 4079 4080 rcu_read_lock(); 4081 ies = rcu_dereference(cbss->ies); 4082 if (ies) 4083 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4084 GFP_ATOMIC); 4085 rcu_read_unlock(); 4086 if (!bss_ies) { 4087 ret = false; 4088 goto out; 4089 } 4090 4091 parse_params.start = bss_ies->data; 4092 parse_params.len = bss_ies->len; 4093 parse_params.bss = cbss; 4094 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4095 if (!bss_elems) { 4096 ret = false; 4097 goto out; 4098 } 4099 4100 if (assoc_data->wmm && 4101 !elems->wmm_param && bss_elems->wmm_param) { 4102 elems->wmm_param = bss_elems->wmm_param; 4103 sdata_info(sdata, 4104 "AP bug: WMM param missing from AssocResp\n"); 4105 } 4106 4107 /* 4108 * Also check if we requested HT/VHT, otherwise the AP doesn't 4109 * have to include the IEs in the (re)association response. 4110 */ 4111 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4112 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4113 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4114 sdata_info(sdata, 4115 "AP bug: HT capability missing from AssocResp\n"); 4116 } 4117 if (!elems->ht_operation && bss_elems->ht_operation && 4118 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4119 elems->ht_operation = bss_elems->ht_operation; 4120 sdata_info(sdata, 4121 "AP bug: HT operation missing from AssocResp\n"); 4122 } 4123 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4124 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4125 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4126 sdata_info(sdata, 4127 "AP bug: VHT capa missing from AssocResp\n"); 4128 } 4129 if (!elems->vht_operation && bss_elems->vht_operation && 4130 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4131 elems->vht_operation = bss_elems->vht_operation; 4132 sdata_info(sdata, 4133 "AP bug: VHT operation missing from AssocResp\n"); 4134 } 4135 4136 kfree(bss_elems); 4137 } 4138 4139 /* 4140 * We previously checked these in the beacon/probe response, so 4141 * they should be present here. This is just a safety net. 4142 */ 4143 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4144 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4145 sdata_info(sdata, 4146 "HT AP is missing WMM params or HT capability/operation\n"); 4147 ret = false; 4148 goto out; 4149 } 4150 4151 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4152 (!elems->vht_cap_elem || !elems->vht_operation)) { 4153 sdata_info(sdata, 4154 "VHT AP is missing VHT capability/operation\n"); 4155 ret = false; 4156 goto out; 4157 } 4158 4159 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4160 !elems->he_6ghz_capa) { 4161 sdata_info(sdata, 4162 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4163 ret = false; 4164 goto out; 4165 } 4166 4167 if (WARN_ON(!link->conf->chandef.chan)) { 4168 ret = false; 4169 goto out; 4170 } 4171 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4172 4173 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4174 (!elems->he_cap || !elems->he_operation)) { 4175 sdata_info(sdata, 4176 "HE AP is missing HE capability/operation\n"); 4177 ret = false; 4178 goto out; 4179 } 4180 4181 /* Set up internal HT/VHT capabilities */ 4182 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4183 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4184 elems->ht_cap_elem, 4185 link_sta); 4186 4187 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4188 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4189 elems->vht_cap_elem, 4190 link_sta); 4191 4192 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4193 elems->he_cap) { 4194 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4195 elems->he_cap, 4196 elems->he_cap_len, 4197 elems->he_6ghz_capa, 4198 link_sta); 4199 4200 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4201 if (elems->rsnx && elems->rsnx_len && 4202 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4203 wiphy_ext_feature_isset(local->hw.wiphy, 4204 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4205 bss_conf->twt_protected = true; 4206 else 4207 bss_conf->twt_protected = false; 4208 4209 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4210 link_sta, elems); 4211 4212 if (elems->eht_operation && elems->eht_cap && 4213 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4214 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4215 elems->he_cap, 4216 elems->he_cap_len, 4217 elems->eht_cap, 4218 elems->eht_cap_len, 4219 link_sta); 4220 4221 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4222 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4223 } else { 4224 bss_conf->eht_support = false; 4225 } 4226 } else { 4227 bss_conf->he_support = false; 4228 bss_conf->twt_requester = false; 4229 bss_conf->twt_protected = false; 4230 bss_conf->eht_support = false; 4231 } 4232 4233 bss_conf->twt_broadcast = 4234 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4235 4236 if (bss_conf->he_support) { 4237 bss_conf->he_bss_color.color = 4238 le32_get_bits(elems->he_operation->he_oper_params, 4239 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4240 bss_conf->he_bss_color.partial = 4241 le32_get_bits(elems->he_operation->he_oper_params, 4242 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4243 bss_conf->he_bss_color.enabled = 4244 !le32_get_bits(elems->he_operation->he_oper_params, 4245 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4246 4247 if (bss_conf->he_bss_color.enabled) 4248 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4249 4250 bss_conf->htc_trig_based_pkt_ext = 4251 le32_get_bits(elems->he_operation->he_oper_params, 4252 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4253 bss_conf->frame_time_rts_th = 4254 le32_get_bits(elems->he_operation->he_oper_params, 4255 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4256 4257 bss_conf->uora_exists = !!elems->uora_element; 4258 if (elems->uora_element) 4259 bss_conf->uora_ocw_range = elems->uora_element[0]; 4260 4261 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4262 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4263 /* TODO: OPEN: what happens if BSS color disable is set? */ 4264 } 4265 4266 if (cbss->transmitted_bss) { 4267 bss_conf->nontransmitted = true; 4268 ether_addr_copy(bss_conf->transmitter_bssid, 4269 cbss->transmitted_bss->bssid); 4270 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4271 bss_conf->bssid_index = cbss->bssid_index; 4272 } 4273 4274 /* 4275 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4276 * in their association response, so ignore that data for our own 4277 * configuration. If it changed since the last beacon, we'll get the 4278 * next beacon and update then. 4279 */ 4280 4281 /* 4282 * If an operating mode notification IE is present, override the 4283 * NSS calculation (that would be done in rate_control_rate_init()) 4284 * and use the # of streams from that element. 4285 */ 4286 if (elems->opmode_notif && 4287 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4288 u8 nss; 4289 4290 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4291 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4292 nss += 1; 4293 link_sta->pub->rx_nss = nss; 4294 } 4295 4296 /* 4297 * Always handle WMM once after association regardless 4298 * of the first value the AP uses. Setting -1 here has 4299 * that effect because the AP values is an unsigned 4300 * 4-bit value. 4301 */ 4302 link->u.mgd.wmm_last_param_set = -1; 4303 link->u.mgd.mu_edca_last_param_set = -1; 4304 4305 if (link->u.mgd.disable_wmm_tracking) { 4306 ieee80211_set_wmm_default(link, false, false); 4307 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4308 elems->wmm_param_len, 4309 elems->mu_edca_param_set)) { 4310 /* still enable QoS since we might have HT/VHT */ 4311 ieee80211_set_wmm_default(link, false, true); 4312 /* disable WMM tracking in this case to disable 4313 * tracking WMM parameter changes in the beacon if 4314 * the parameters weren't actually valid. Doing so 4315 * avoids changing parameters very strangely when 4316 * the AP is going back and forth between valid and 4317 * invalid parameters. 4318 */ 4319 link->u.mgd.disable_wmm_tracking = true; 4320 } 4321 4322 if (elems->max_idle_period_ie) { 4323 bss_conf->max_idle_period = 4324 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4325 bss_conf->protected_keep_alive = 4326 !!(elems->max_idle_period_ie->idle_options & 4327 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4328 *changed |= BSS_CHANGED_KEEP_ALIVE; 4329 } else { 4330 bss_conf->max_idle_period = 0; 4331 bss_conf->protected_keep_alive = false; 4332 } 4333 4334 /* set assoc capability (AID was already set earlier), 4335 * ieee80211_set_associated() will tell the driver */ 4336 bss_conf->assoc_capability = capab_info; 4337 4338 ret = true; 4339 out: 4340 kfree(elems); 4341 kfree(bss_ies); 4342 return ret; 4343 } 4344 4345 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4346 struct sta_info *sta, 4347 struct link_sta_info *link_sta, 4348 struct cfg80211_bss *cbss) 4349 { 4350 struct ieee80211_sub_if_data *sdata = link->sdata; 4351 struct ieee80211_local *local = sdata->local; 4352 struct ieee80211_bss *bss = (void *)cbss->priv; 4353 u32 rates = 0, basic_rates = 0; 4354 bool have_higher_than_11mbit = false; 4355 int min_rate = INT_MAX, min_rate_index = -1; 4356 /* this is clearly wrong for MLO but we'll just remove it later */ 4357 int shift = ieee80211_vif_get_shift(&sdata->vif); 4358 struct ieee80211_supported_band *sband; 4359 4360 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4361 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4362 4363 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4364 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4365 ieee80211_s1g_sta_rate_init(sta); 4366 return 0; 4367 } 4368 4369 sband = local->hw.wiphy->bands[cbss->channel->band]; 4370 4371 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4372 &rates, &basic_rates, &have_higher_than_11mbit, 4373 &min_rate, &min_rate_index, shift); 4374 4375 /* 4376 * This used to be a workaround for basic rates missing 4377 * in the association response frame. Now that we no 4378 * longer use the basic rates from there, it probably 4379 * doesn't happen any more, but keep the workaround so 4380 * in case some *other* APs are buggy in different ways 4381 * we can connect -- with a warning. 4382 * Allow this workaround only in case the AP provided at least 4383 * one rate. 4384 */ 4385 if (min_rate_index < 0) { 4386 link_info(link, "No legacy rates in association response\n"); 4387 return -EINVAL; 4388 } else if (!basic_rates) { 4389 link_info(link, "No basic rates, using min rate instead\n"); 4390 basic_rates = BIT(min_rate_index); 4391 } 4392 4393 if (rates) 4394 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4395 else 4396 link_info(link, "No rates found, keeping mandatory only\n"); 4397 4398 link->conf->basic_rates = basic_rates; 4399 4400 /* cf. IEEE 802.11 9.2.12 */ 4401 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4402 have_higher_than_11mbit; 4403 4404 return 0; 4405 } 4406 4407 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4408 struct cfg80211_bss *cbss) 4409 { 4410 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4411 const struct element *ht_cap_elem, *vht_cap_elem; 4412 const struct cfg80211_bss_ies *ies; 4413 const struct ieee80211_ht_cap *ht_cap; 4414 const struct ieee80211_vht_cap *vht_cap; 4415 const struct ieee80211_he_cap_elem *he_cap; 4416 const struct element *he_cap_elem; 4417 u16 mcs_80_map, mcs_160_map; 4418 int i, mcs_nss_size; 4419 bool support_160; 4420 u8 chains = 1; 4421 4422 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4423 return chains; 4424 4425 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4426 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4427 ht_cap = (void *)ht_cap_elem->data; 4428 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4429 /* 4430 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4431 * "Tx Unequal Modulation Supported" fields. 4432 */ 4433 } 4434 4435 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4436 return chains; 4437 4438 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4439 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4440 u8 nss; 4441 u16 tx_mcs_map; 4442 4443 vht_cap = (void *)vht_cap_elem->data; 4444 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4445 for (nss = 8; nss > 0; nss--) { 4446 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4447 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4448 break; 4449 } 4450 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4451 chains = max(chains, nss); 4452 } 4453 4454 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4455 return chains; 4456 4457 ies = rcu_dereference(cbss->ies); 4458 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4459 ies->data, ies->len); 4460 4461 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4462 return chains; 4463 4464 /* skip one byte ext_tag_id */ 4465 he_cap = (void *)(he_cap_elem->data + 1); 4466 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4467 4468 /* invalid HE IE */ 4469 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4470 return chains; 4471 4472 /* mcs_nss is right after he_cap info */ 4473 he_mcs_nss_supp = (void *)(he_cap + 1); 4474 4475 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4476 4477 for (i = 7; i >= 0; i--) { 4478 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4479 4480 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4481 chains = max_t(u8, chains, i + 1); 4482 break; 4483 } 4484 } 4485 4486 support_160 = he_cap->phy_cap_info[0] & 4487 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4488 4489 if (!support_160) 4490 return chains; 4491 4492 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4493 for (i = 7; i >= 0; i--) { 4494 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4495 4496 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4497 chains = max_t(u8, chains, i + 1); 4498 break; 4499 } 4500 } 4501 4502 return chains; 4503 } 4504 4505 static bool 4506 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4507 const struct cfg80211_bss_ies *ies, 4508 const struct ieee80211_he_operation *he_op) 4509 { 4510 const struct element *he_cap_elem; 4511 const struct ieee80211_he_cap_elem *he_cap; 4512 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4513 u16 mcs_80_map_tx, mcs_80_map_rx; 4514 u16 ap_min_req_set; 4515 int mcs_nss_size; 4516 int nss; 4517 4518 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4519 ies->data, ies->len); 4520 4521 if (!he_cap_elem) 4522 return false; 4523 4524 /* invalid HE IE */ 4525 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4526 sdata_info(sdata, 4527 "Invalid HE elem, Disable HE\n"); 4528 return false; 4529 } 4530 4531 /* skip one byte ext_tag_id */ 4532 he_cap = (void *)(he_cap_elem->data + 1); 4533 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4534 4535 /* invalid HE IE */ 4536 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4537 sdata_info(sdata, 4538 "Invalid HE elem with nss size, Disable HE\n"); 4539 return false; 4540 } 4541 4542 /* mcs_nss is right after he_cap info */ 4543 he_mcs_nss_supp = (void *)(he_cap + 1); 4544 4545 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4546 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4547 4548 /* P802.11-REVme/D0.3 4549 * 27.1.1 Introduction to the HE PHY 4550 * ... 4551 * An HE STA shall support the following features: 4552 * ... 4553 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4554 * supported channel widths for HE SU PPDUs 4555 */ 4556 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4557 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4558 sdata_info(sdata, 4559 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4560 mcs_80_map_tx, mcs_80_map_rx); 4561 return false; 4562 } 4563 4564 if (!he_op) 4565 return true; 4566 4567 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4568 4569 /* 4570 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4571 * zeroes, which is nonsense, and completely inconsistent with itself 4572 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4573 */ 4574 if (!ap_min_req_set) 4575 return true; 4576 4577 /* make sure the AP is consistent with itself 4578 * 4579 * P802.11-REVme/D0.3 4580 * 26.17.1 Basic HE BSS operation 4581 * 4582 * A STA that is operating in an HE BSS shall be able to receive and 4583 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4584 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4585 * MLME-START.request primitive and shall be able to receive at each of 4586 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4587 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4588 * primitive 4589 */ 4590 for (nss = 8; nss > 0; nss--) { 4591 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4592 u8 ap_rx_val; 4593 u8 ap_tx_val; 4594 4595 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4596 continue; 4597 4598 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4599 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4600 4601 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4602 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4603 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4604 sdata_info(sdata, 4605 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4606 nss, ap_rx_val, ap_rx_val, ap_op_val); 4607 return false; 4608 } 4609 } 4610 4611 return true; 4612 } 4613 4614 static bool 4615 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4616 struct ieee80211_supported_band *sband, 4617 const struct ieee80211_he_operation *he_op) 4618 { 4619 const struct ieee80211_sta_he_cap *sta_he_cap = 4620 ieee80211_get_he_iftype_cap(sband, 4621 ieee80211_vif_type_p2p(&sdata->vif)); 4622 u16 ap_min_req_set; 4623 int i; 4624 4625 if (!sta_he_cap || !he_op) 4626 return false; 4627 4628 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4629 4630 /* 4631 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4632 * zeroes, which is nonsense, and completely inconsistent with itself 4633 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4634 */ 4635 if (!ap_min_req_set) 4636 return true; 4637 4638 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4639 for (i = 0; i < 3; i++) { 4640 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4641 &sta_he_cap->he_mcs_nss_supp; 4642 u16 sta_mcs_map_rx = 4643 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4644 u16 sta_mcs_map_tx = 4645 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4646 u8 nss; 4647 bool verified = true; 4648 4649 /* 4650 * For each band there is a maximum of 8 spatial streams 4651 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4652 * of 2 bits per NSS (1-8), with the values defined in enum 4653 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4654 * capabilities aren't less than the AP's minimum requirements 4655 * for this HE BSS per SS. 4656 * It is enough to find one such band that meets the reqs. 4657 */ 4658 for (nss = 8; nss > 0; nss--) { 4659 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4660 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4661 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4662 4663 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4664 continue; 4665 4666 /* 4667 * Make sure the HE AP doesn't require MCSs that aren't 4668 * supported by the client as required by spec 4669 * 4670 * P802.11-REVme/D0.3 4671 * 26.17.1 Basic HE BSS operation 4672 * 4673 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4674 * a BSS, unless it supports (i.e., is able to both transmit and 4675 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4676 * HE-MCS and NSS set. 4677 */ 4678 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4679 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4680 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4681 verified = false; 4682 break; 4683 } 4684 } 4685 4686 if (verified) 4687 return true; 4688 } 4689 4690 /* If here, STA doesn't meet AP's HE min requirements */ 4691 return false; 4692 } 4693 4694 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4695 struct ieee80211_link_data *link, 4696 struct cfg80211_bss *cbss, 4697 ieee80211_conn_flags_t *conn_flags) 4698 { 4699 struct ieee80211_local *local = sdata->local; 4700 const struct ieee80211_ht_cap *ht_cap = NULL; 4701 const struct ieee80211_ht_operation *ht_oper = NULL; 4702 const struct ieee80211_vht_operation *vht_oper = NULL; 4703 const struct ieee80211_he_operation *he_oper = NULL; 4704 const struct ieee80211_eht_operation *eht_oper = NULL; 4705 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4706 struct ieee80211_supported_band *sband; 4707 struct cfg80211_chan_def chandef; 4708 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4709 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4710 struct ieee80211_bss *bss = (void *)cbss->priv; 4711 struct ieee80211_elems_parse_params parse_params = { 4712 .bss = cbss, 4713 .link_id = -1, 4714 .from_ap = true, 4715 }; 4716 struct ieee802_11_elems *elems; 4717 const struct cfg80211_bss_ies *ies; 4718 int ret; 4719 u32 i; 4720 bool have_80mhz; 4721 4722 rcu_read_lock(); 4723 4724 ies = rcu_dereference(cbss->ies); 4725 parse_params.start = ies->data; 4726 parse_params.len = ies->len; 4727 elems = ieee802_11_parse_elems_full(&parse_params); 4728 if (!elems) { 4729 rcu_read_unlock(); 4730 return -ENOMEM; 4731 } 4732 4733 sband = local->hw.wiphy->bands[cbss->channel->band]; 4734 4735 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4736 IEEE80211_CONN_DISABLE_80P80MHZ | 4737 IEEE80211_CONN_DISABLE_160MHZ); 4738 4739 /* disable HT/VHT/HE if we don't support them */ 4740 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4741 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4742 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4743 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4744 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4745 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4746 } 4747 4748 if (!sband->vht_cap.vht_supported && is_5ghz) { 4749 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 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 (!ieee80211_get_he_iftype_cap(sband, 4756 ieee80211_vif_type_p2p(&sdata->vif))) { 4757 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4758 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4759 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4760 } 4761 4762 if (!ieee80211_get_eht_iftype_cap(sband, 4763 ieee80211_vif_type_p2p(&sdata->vif))) { 4764 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4765 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4766 } 4767 4768 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4769 ht_oper = elems->ht_operation; 4770 ht_cap = elems->ht_cap_elem; 4771 4772 if (!ht_cap) { 4773 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4774 ht_oper = NULL; 4775 } 4776 } 4777 4778 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4779 vht_oper = elems->vht_operation; 4780 if (vht_oper && !ht_oper) { 4781 vht_oper = NULL; 4782 sdata_info(sdata, 4783 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4784 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4785 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4786 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4787 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4788 } 4789 4790 if (!elems->vht_cap_elem) { 4791 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4792 vht_oper = NULL; 4793 } 4794 } 4795 4796 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4797 he_oper = elems->he_operation; 4798 4799 if (link && is_6ghz) { 4800 struct ieee80211_bss_conf *bss_conf; 4801 u8 j = 0; 4802 4803 bss_conf = link->conf; 4804 4805 if (elems->pwr_constr_elem) 4806 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4807 4808 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4809 ARRAY_SIZE(elems->tx_pwr_env)); 4810 4811 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4812 if (elems->tx_pwr_env_len[i] > 4813 sizeof(bss_conf->tx_pwr_env[j])) 4814 continue; 4815 4816 bss_conf->tx_pwr_env_num++; 4817 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4818 elems->tx_pwr_env_len[i]); 4819 j++; 4820 } 4821 } 4822 4823 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4824 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4825 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4826 IEEE80211_CONN_DISABLE_EHT; 4827 } 4828 4829 /* 4830 * EHT requires HE to be supported as well. Specifically for 6 GHz 4831 * channels, the operation channel information can only be deduced from 4832 * both the 6 GHz operation information (from the HE operation IE) and 4833 * EHT operation. 4834 */ 4835 if (!(*conn_flags & 4836 (IEEE80211_CONN_DISABLE_HE | 4837 IEEE80211_CONN_DISABLE_EHT)) && 4838 he_oper) { 4839 const struct cfg80211_bss_ies *cbss_ies; 4840 const u8 *eht_oper_ie; 4841 4842 cbss_ies = rcu_dereference(cbss->ies); 4843 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4844 cbss_ies->data, cbss_ies->len); 4845 if (eht_oper_ie && eht_oper_ie[1] >= 4846 1 + sizeof(struct ieee80211_eht_operation)) 4847 eht_oper = (void *)(eht_oper_ie + 3); 4848 else 4849 eht_oper = NULL; 4850 } 4851 4852 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4853 have_80mhz = false; 4854 for (i = 0; i < sband->n_channels; i++) { 4855 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4856 IEEE80211_CHAN_NO_80MHZ)) 4857 continue; 4858 4859 have_80mhz = true; 4860 break; 4861 } 4862 4863 if (!have_80mhz) { 4864 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4865 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4866 } 4867 4868 if (sband->band == NL80211_BAND_S1GHZ) { 4869 s1g_oper = elems->s1g_oper; 4870 if (!s1g_oper) 4871 sdata_info(sdata, 4872 "AP missing S1G operation element?\n"); 4873 } 4874 4875 *conn_flags |= 4876 ieee80211_determine_chantype(sdata, link, *conn_flags, 4877 sband, 4878 cbss->channel, 4879 bss->vht_cap_info, 4880 ht_oper, vht_oper, 4881 he_oper, eht_oper, 4882 s1g_oper, 4883 &chandef, false); 4884 4885 if (link) 4886 link->needed_rx_chains = 4887 min(ieee80211_max_rx_chains(link, cbss), 4888 local->rx_chains); 4889 4890 rcu_read_unlock(); 4891 /* the element data was RCU protected so no longer valid anyway */ 4892 kfree(elems); 4893 elems = NULL; 4894 4895 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4896 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4897 return -EINVAL; 4898 } 4899 4900 if (!link) 4901 return 0; 4902 4903 /* will change later if needed */ 4904 link->smps_mode = IEEE80211_SMPS_OFF; 4905 4906 mutex_lock(&local->mtx); 4907 /* 4908 * If this fails (possibly due to channel context sharing 4909 * on incompatible channels, e.g. 80+80 and 160 sharing the 4910 * same control channel) try to use a smaller bandwidth. 4911 */ 4912 ret = ieee80211_link_use_channel(link, &chandef, 4913 IEEE80211_CHANCTX_SHARED); 4914 4915 /* don't downgrade for 5 and 10 MHz channels, though. */ 4916 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4917 chandef.width == NL80211_CHAN_WIDTH_10) 4918 goto out; 4919 4920 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4921 *conn_flags |= 4922 ieee80211_chandef_downgrade(&chandef); 4923 ret = ieee80211_link_use_channel(link, &chandef, 4924 IEEE80211_CHANCTX_SHARED); 4925 } 4926 out: 4927 mutex_unlock(&local->mtx); 4928 return ret; 4929 } 4930 4931 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4932 u8 *dtim_count, u8 *dtim_period) 4933 { 4934 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4935 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4936 ies->len); 4937 const struct ieee80211_tim_ie *tim = NULL; 4938 const struct ieee80211_bssid_index *idx; 4939 bool valid = tim_ie && tim_ie[1] >= 2; 4940 4941 if (valid) 4942 tim = (void *)(tim_ie + 2); 4943 4944 if (dtim_count) 4945 *dtim_count = valid ? tim->dtim_count : 0; 4946 4947 if (dtim_period) 4948 *dtim_period = valid ? tim->dtim_period : 0; 4949 4950 /* Check if value is overridden by non-transmitted profile */ 4951 if (!idx_ie || idx_ie[1] < 3) 4952 return valid; 4953 4954 idx = (void *)(idx_ie + 2); 4955 4956 if (dtim_count) 4957 *dtim_count = idx->dtim_count; 4958 4959 if (dtim_period) 4960 *dtim_period = idx->dtim_period; 4961 4962 return true; 4963 } 4964 4965 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4966 struct ieee80211_mgmt *mgmt, 4967 struct ieee802_11_elems *elems, 4968 const u8 *elem_start, unsigned int elem_len) 4969 { 4970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4971 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4972 struct ieee80211_local *local = sdata->local; 4973 unsigned int link_id; 4974 struct sta_info *sta; 4975 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4976 u16 valid_links = 0; 4977 int err; 4978 4979 mutex_lock(&sdata->local->sta_mtx); 4980 /* 4981 * station info was already allocated and inserted before 4982 * the association and should be available to us 4983 */ 4984 sta = sta_info_get(sdata, assoc_data->ap_addr); 4985 if (WARN_ON(!sta)) 4986 goto out_err; 4987 4988 if (sdata->vif.valid_links) { 4989 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4990 if (!assoc_data->link[link_id].bss) 4991 continue; 4992 valid_links |= BIT(link_id); 4993 4994 if (link_id != assoc_data->assoc_link_id) { 4995 err = ieee80211_sta_allocate_link(sta, link_id); 4996 if (err) 4997 goto out_err; 4998 } 4999 } 5000 5001 ieee80211_vif_set_links(sdata, valid_links); 5002 } 5003 5004 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5005 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5006 struct ieee80211_link_data *link; 5007 struct link_sta_info *link_sta; 5008 5009 if (!cbss) 5010 continue; 5011 5012 link = sdata_dereference(sdata->link[link_id], sdata); 5013 if (WARN_ON(!link)) 5014 goto out_err; 5015 5016 if (sdata->vif.valid_links) 5017 link_info(link, 5018 "local address %pM, AP link address %pM%s\n", 5019 link->conf->addr, 5020 assoc_data->link[link_id].bss->bssid, 5021 link_id == assoc_data->assoc_link_id ? 5022 " (assoc)" : ""); 5023 5024 link_sta = rcu_dereference_protected(sta->link[link_id], 5025 lockdep_is_held(&local->sta_mtx)); 5026 if (WARN_ON(!link_sta)) 5027 goto out_err; 5028 5029 if (!link->u.mgd.have_beacon) { 5030 const struct cfg80211_bss_ies *ies; 5031 5032 rcu_read_lock(); 5033 ies = rcu_dereference(cbss->beacon_ies); 5034 if (ies) 5035 link->u.mgd.have_beacon = true; 5036 else 5037 ies = rcu_dereference(cbss->ies); 5038 ieee80211_get_dtim(ies, 5039 &link->conf->sync_dtim_count, 5040 &link->u.mgd.dtim_period); 5041 link->conf->beacon_int = cbss->beacon_interval; 5042 rcu_read_unlock(); 5043 } 5044 5045 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5046 5047 if (link_id != assoc_data->assoc_link_id) { 5048 err = ieee80211_prep_channel(sdata, link, cbss, 5049 &link->u.mgd.conn_flags); 5050 if (err) { 5051 link_info(link, "prep_channel failed\n"); 5052 goto out_err; 5053 } 5054 } 5055 5056 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5057 assoc_data->link[link_id].bss); 5058 if (err) 5059 goto out_err; 5060 5061 if (!ieee80211_assoc_config_link(link, link_sta, 5062 assoc_data->link[link_id].bss, 5063 mgmt, elem_start, elem_len, 5064 &changed[link_id])) 5065 goto out_err; 5066 5067 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5068 valid_links &= ~BIT(link_id); 5069 ieee80211_sta_remove_link(sta, link_id); 5070 continue; 5071 } 5072 5073 if (link_id != assoc_data->assoc_link_id) { 5074 err = ieee80211_sta_activate_link(sta, link_id); 5075 if (err) 5076 goto out_err; 5077 } 5078 } 5079 5080 /* links might have changed due to rejected ones, set them again */ 5081 ieee80211_vif_set_links(sdata, valid_links); 5082 5083 rate_control_rate_init(sta); 5084 5085 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5086 set_sta_flag(sta, WLAN_STA_MFP); 5087 sta->sta.mfp = true; 5088 } else { 5089 sta->sta.mfp = false; 5090 } 5091 5092 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5093 elems->ext_capab_len); 5094 5095 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5096 local->hw.queues >= IEEE80211_NUM_ACS; 5097 5098 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5099 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5100 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5101 if (err) { 5102 sdata_info(sdata, 5103 "failed to move station %pM to desired state\n", 5104 sta->sta.addr); 5105 WARN_ON(__sta_info_destroy(sta)); 5106 goto out_err; 5107 } 5108 5109 if (sdata->wdev.use_4addr) 5110 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5111 5112 mutex_unlock(&sdata->local->sta_mtx); 5113 5114 ieee80211_set_associated(sdata, assoc_data, changed); 5115 5116 /* 5117 * If we're using 4-addr mode, let the AP know that we're 5118 * doing so, so that it can create the STA VLAN on its side 5119 */ 5120 if (ifmgd->use_4addr) 5121 ieee80211_send_4addr_nullfunc(local, sdata); 5122 5123 /* 5124 * Start timer to probe the connection to the AP now. 5125 * Also start the timer that will detect beacon loss. 5126 */ 5127 ieee80211_sta_reset_beacon_monitor(sdata); 5128 ieee80211_sta_reset_conn_monitor(sdata); 5129 5130 return true; 5131 out_err: 5132 eth_zero_addr(sdata->vif.cfg.ap_addr); 5133 mutex_unlock(&sdata->local->sta_mtx); 5134 return false; 5135 } 5136 5137 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5138 struct ieee80211_mgmt *mgmt, 5139 size_t len) 5140 { 5141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5142 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5143 u16 capab_info, status_code, aid; 5144 struct ieee80211_elems_parse_params parse_params = { 5145 .bss = NULL, 5146 .link_id = -1, 5147 .from_ap = true, 5148 }; 5149 struct ieee802_11_elems *elems; 5150 int ac; 5151 const u8 *elem_start; 5152 unsigned int elem_len; 5153 bool reassoc; 5154 struct ieee80211_event event = { 5155 .type = MLME_EVENT, 5156 .u.mlme.data = ASSOC_EVENT, 5157 }; 5158 struct ieee80211_prep_tx_info info = {}; 5159 struct cfg80211_rx_assoc_resp resp = { 5160 .uapsd_queues = -1, 5161 }; 5162 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5163 unsigned int link_id; 5164 5165 sdata_assert_lock(sdata); 5166 5167 if (!assoc_data) 5168 return; 5169 5170 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5171 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5172 return; 5173 5174 /* 5175 * AssocResp and ReassocResp have identical structure, so process both 5176 * of them in this function. 5177 */ 5178 5179 if (len < 24 + 6) 5180 return; 5181 5182 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5183 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5184 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5185 if (assoc_data->s1g) 5186 elem_start = mgmt->u.s1g_assoc_resp.variable; 5187 else 5188 elem_start = mgmt->u.assoc_resp.variable; 5189 5190 /* 5191 * Note: this may not be perfect, AP might misbehave - if 5192 * anyone needs to rely on perfect complete notification 5193 * with the exact right subtype, then we need to track what 5194 * we actually transmitted. 5195 */ 5196 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5197 IEEE80211_STYPE_ASSOC_REQ; 5198 5199 if (assoc_data->fils_kek_len && 5200 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5201 return; 5202 5203 elem_len = len - (elem_start - (u8 *)mgmt); 5204 parse_params.start = elem_start; 5205 parse_params.len = elem_len; 5206 elems = ieee802_11_parse_elems_full(&parse_params); 5207 if (!elems) 5208 goto notify_driver; 5209 5210 if (elems->aid_resp) 5211 aid = le16_to_cpu(elems->aid_resp->aid); 5212 else if (assoc_data->s1g) 5213 aid = 0; /* TODO */ 5214 else 5215 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5216 5217 /* 5218 * The 5 MSB of the AID field are reserved 5219 * (802.11-2016 9.4.1.8 AID field) 5220 */ 5221 aid &= 0x7ff; 5222 5223 sdata_info(sdata, 5224 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5225 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5226 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5227 5228 ifmgd->broken_ap = false; 5229 5230 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5231 elems->timeout_int && 5232 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5233 u32 tu, ms; 5234 5235 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5236 le32_to_cpu(elems->timeout_int->value)); 5237 5238 tu = le32_to_cpu(elems->timeout_int->value); 5239 ms = tu * 1024 / 1000; 5240 sdata_info(sdata, 5241 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5242 assoc_data->ap_addr, tu, ms); 5243 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5244 assoc_data->timeout_started = true; 5245 if (ms > IEEE80211_ASSOC_TIMEOUT) 5246 run_again(sdata, assoc_data->timeout); 5247 goto notify_driver; 5248 } 5249 5250 if (status_code != WLAN_STATUS_SUCCESS) { 5251 sdata_info(sdata, "%pM denied association (code=%d)\n", 5252 assoc_data->ap_addr, status_code); 5253 event.u.mlme.status = MLME_DENIED; 5254 event.u.mlme.reason = status_code; 5255 drv_event_callback(sdata->local, sdata, &event); 5256 } else { 5257 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5258 sdata_info(sdata, 5259 "invalid AID value %d (out of range), turn off PS\n", 5260 aid); 5261 aid = 0; 5262 ifmgd->broken_ap = true; 5263 } 5264 5265 if (sdata->vif.valid_links) { 5266 if (!elems->multi_link) { 5267 sdata_info(sdata, 5268 "MLO association with %pM but no multi-link element in response!\n", 5269 assoc_data->ap_addr); 5270 goto abandon_assoc; 5271 } 5272 5273 if (le16_get_bits(elems->multi_link->control, 5274 IEEE80211_ML_CONTROL_TYPE) != 5275 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5276 sdata_info(sdata, 5277 "bad multi-link element (control=0x%x)\n", 5278 le16_to_cpu(elems->multi_link->control)); 5279 goto abandon_assoc; 5280 } else { 5281 struct ieee80211_mle_basic_common_info *common; 5282 5283 common = (void *)elems->multi_link->variable; 5284 5285 if (memcmp(assoc_data->ap_addr, 5286 common->mld_mac_addr, ETH_ALEN)) { 5287 sdata_info(sdata, 5288 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5289 common->mld_mac_addr, 5290 assoc_data->ap_addr); 5291 goto abandon_assoc; 5292 } 5293 } 5294 } 5295 5296 sdata->vif.cfg.aid = aid; 5297 5298 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5299 elem_start, elem_len)) { 5300 /* oops -- internal error -- send timeout for now */ 5301 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5302 goto notify_driver; 5303 } 5304 event.u.mlme.status = MLME_SUCCESS; 5305 drv_event_callback(sdata->local, sdata, &event); 5306 sdata_info(sdata, "associated\n"); 5307 5308 info.success = 1; 5309 } 5310 5311 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5312 struct ieee80211_link_data *link; 5313 5314 link = sdata_dereference(sdata->link[link_id], sdata); 5315 if (!link) 5316 continue; 5317 5318 if (!assoc_data->link[link_id].bss) 5319 continue; 5320 5321 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5322 resp.links[link_id].addr = link->conf->addr; 5323 resp.links[link_id].status = assoc_data->link[link_id].status; 5324 5325 /* get uapsd queues configuration - same for all links */ 5326 resp.uapsd_queues = 0; 5327 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5328 if (link->tx_conf[ac].uapsd) 5329 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5330 } 5331 5332 if (sdata->vif.valid_links) { 5333 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5334 resp.ap_mld_addr = ap_mld_addr; 5335 } 5336 5337 ieee80211_destroy_assoc_data(sdata, 5338 status_code == WLAN_STATUS_SUCCESS ? 5339 ASSOC_SUCCESS : 5340 ASSOC_REJECTED); 5341 5342 resp.buf = (u8 *)mgmt; 5343 resp.len = len; 5344 resp.req_ies = ifmgd->assoc_req_ies; 5345 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5346 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5347 notify_driver: 5348 drv_mgd_complete_tx(sdata->local, sdata, &info); 5349 kfree(elems); 5350 return; 5351 abandon_assoc: 5352 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5353 goto notify_driver; 5354 } 5355 5356 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5357 struct ieee80211_mgmt *mgmt, size_t len, 5358 struct ieee80211_rx_status *rx_status) 5359 { 5360 struct ieee80211_sub_if_data *sdata = link->sdata; 5361 struct ieee80211_local *local = sdata->local; 5362 struct ieee80211_bss *bss; 5363 struct ieee80211_channel *channel; 5364 5365 sdata_assert_lock(sdata); 5366 5367 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5368 ieee80211_rx_status_to_khz(rx_status)); 5369 if (!channel) 5370 return; 5371 5372 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5373 if (bss) { 5374 link->conf->beacon_rate = bss->beacon_rate; 5375 ieee80211_rx_bss_put(local, bss); 5376 } 5377 } 5378 5379 5380 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5381 struct sk_buff *skb) 5382 { 5383 struct ieee80211_sub_if_data *sdata = link->sdata; 5384 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5385 struct ieee80211_if_managed *ifmgd; 5386 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5387 struct ieee80211_channel *channel; 5388 size_t baselen, len = skb->len; 5389 5390 ifmgd = &sdata->u.mgd; 5391 5392 sdata_assert_lock(sdata); 5393 5394 /* 5395 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5396 * "If a 6 GHz AP receives a Probe Request frame and responds with 5397 * a Probe Response frame [..], the Address 1 field of the Probe 5398 * Response frame shall be set to the broadcast address [..]" 5399 * So, on 6GHz band we should also accept broadcast responses. 5400 */ 5401 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5402 rx_status->freq); 5403 if (!channel) 5404 return; 5405 5406 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5407 (channel->band != NL80211_BAND_6GHZ || 5408 !is_broadcast_ether_addr(mgmt->da))) 5409 return; /* ignore ProbeResp to foreign address */ 5410 5411 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5412 if (baselen > len) 5413 return; 5414 5415 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5416 5417 if (ifmgd->associated && 5418 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5419 ieee80211_reset_ap_probe(sdata); 5420 } 5421 5422 /* 5423 * This is the canonical list of information elements we care about, 5424 * the filter code also gives us all changes to the Microsoft OUI 5425 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5426 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5427 * changes to requested client power. 5428 * 5429 * We implement beacon filtering in software since that means we can 5430 * avoid processing the frame here and in cfg80211, and userspace 5431 * will not be able to tell whether the hardware supports it or not. 5432 * 5433 * XXX: This list needs to be dynamic -- userspace needs to be able to 5434 * add items it requires. It also needs to be able to tell us to 5435 * look out for other vendor IEs. 5436 */ 5437 static const u64 care_about_ies = 5438 (1ULL << WLAN_EID_COUNTRY) | 5439 (1ULL << WLAN_EID_ERP_INFO) | 5440 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5441 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5442 (1ULL << WLAN_EID_HT_CAPABILITY) | 5443 (1ULL << WLAN_EID_HT_OPERATION) | 5444 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5445 5446 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5447 struct ieee80211_if_managed *ifmgd, 5448 struct ieee80211_bss_conf *bss_conf, 5449 struct ieee80211_local *local, 5450 struct ieee80211_rx_status *rx_status) 5451 { 5452 struct ieee80211_sub_if_data *sdata = link->sdata; 5453 5454 /* Track average RSSI from the Beacon frames of the current AP */ 5455 5456 if (!link->u.mgd.tracking_signal_avg) { 5457 link->u.mgd.tracking_signal_avg = true; 5458 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5459 link->u.mgd.last_cqm_event_signal = 0; 5460 link->u.mgd.count_beacon_signal = 1; 5461 link->u.mgd.last_ave_beacon_signal = 0; 5462 } else { 5463 link->u.mgd.count_beacon_signal++; 5464 } 5465 5466 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5467 -rx_status->signal); 5468 5469 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5470 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5471 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5472 int last_sig = link->u.mgd.last_ave_beacon_signal; 5473 struct ieee80211_event event = { 5474 .type = RSSI_EVENT, 5475 }; 5476 5477 /* 5478 * if signal crosses either of the boundaries, invoke callback 5479 * with appropriate parameters 5480 */ 5481 if (sig > ifmgd->rssi_max_thold && 5482 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5483 link->u.mgd.last_ave_beacon_signal = sig; 5484 event.u.rssi.data = RSSI_EVENT_HIGH; 5485 drv_event_callback(local, sdata, &event); 5486 } else if (sig < ifmgd->rssi_min_thold && 5487 (last_sig >= ifmgd->rssi_max_thold || 5488 last_sig == 0)) { 5489 link->u.mgd.last_ave_beacon_signal = sig; 5490 event.u.rssi.data = RSSI_EVENT_LOW; 5491 drv_event_callback(local, sdata, &event); 5492 } 5493 } 5494 5495 if (bss_conf->cqm_rssi_thold && 5496 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5497 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5498 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5499 int last_event = link->u.mgd.last_cqm_event_signal; 5500 int thold = bss_conf->cqm_rssi_thold; 5501 int hyst = bss_conf->cqm_rssi_hyst; 5502 5503 if (sig < thold && 5504 (last_event == 0 || sig < last_event - hyst)) { 5505 link->u.mgd.last_cqm_event_signal = sig; 5506 ieee80211_cqm_rssi_notify( 5507 &sdata->vif, 5508 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5509 sig, GFP_KERNEL); 5510 } else 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_HIGH, 5516 sig, GFP_KERNEL); 5517 } 5518 } 5519 5520 if (bss_conf->cqm_rssi_low && 5521 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5522 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5523 int last_event = link->u.mgd.last_cqm_event_signal; 5524 int low = bss_conf->cqm_rssi_low; 5525 int high = bss_conf->cqm_rssi_high; 5526 5527 if (sig < low && 5528 (last_event == 0 || last_event >= low)) { 5529 link->u.mgd.last_cqm_event_signal = sig; 5530 ieee80211_cqm_rssi_notify( 5531 &sdata->vif, 5532 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5533 sig, GFP_KERNEL); 5534 } else if (sig > high && 5535 (last_event == 0 || last_event <= high)) { 5536 link->u.mgd.last_cqm_event_signal = sig; 5537 ieee80211_cqm_rssi_notify( 5538 &sdata->vif, 5539 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5540 sig, GFP_KERNEL); 5541 } 5542 } 5543 } 5544 5545 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5546 struct cfg80211_bss *bss) 5547 { 5548 if (ether_addr_equal(tx_bssid, bss->bssid)) 5549 return true; 5550 if (!bss->transmitted_bss) 5551 return false; 5552 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5553 } 5554 5555 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5556 const struct ieee80211_eht_operation *eht_oper, 5557 u64 *changed) 5558 { 5559 u16 bitmap = 0, extracted; 5560 5561 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5562 (eht_oper->params & 5563 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5564 const struct ieee80211_eht_operation_info *info = 5565 (void *)eht_oper->optional; 5566 const u8 *disable_subchannel_bitmap = info->optional; 5567 5568 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5569 } 5570 5571 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5572 &link->conf->chandef, 5573 bitmap); 5574 5575 /* accept if there are no changes */ 5576 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5577 extracted == link->conf->eht_puncturing) 5578 return true; 5579 5580 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5581 &link->conf->chandef)) { 5582 link_info(link, 5583 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5584 link->u.mgd.bssid, 5585 bitmap, 5586 link->conf->chandef.width); 5587 return false; 5588 } 5589 5590 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5591 return true; 5592 } 5593 5594 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5595 struct ieee80211_hdr *hdr, size_t len, 5596 struct ieee80211_rx_status *rx_status) 5597 { 5598 struct ieee80211_sub_if_data *sdata = link->sdata; 5599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5600 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5601 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5602 struct ieee80211_mgmt *mgmt = (void *) hdr; 5603 size_t baselen; 5604 struct ieee802_11_elems *elems; 5605 struct ieee80211_local *local = sdata->local; 5606 struct ieee80211_chanctx_conf *chanctx_conf; 5607 struct ieee80211_supported_band *sband; 5608 struct ieee80211_channel *chan; 5609 struct link_sta_info *link_sta; 5610 struct sta_info *sta; 5611 u64 changed = 0; 5612 bool erp_valid; 5613 u8 erp_value = 0; 5614 u32 ncrc = 0; 5615 u8 *bssid, *variable = mgmt->u.beacon.variable; 5616 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5617 struct ieee80211_elems_parse_params parse_params = { 5618 .link_id = -1, 5619 .from_ap = true, 5620 }; 5621 5622 sdata_assert_lock(sdata); 5623 5624 /* Process beacon from the current BSS */ 5625 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5626 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5627 struct ieee80211_ext *ext = (void *) mgmt; 5628 5629 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5630 variable = ext->u.s1g_short_beacon.variable; 5631 else 5632 variable = ext->u.s1g_beacon.variable; 5633 } 5634 5635 baselen = (u8 *) variable - (u8 *) mgmt; 5636 if (baselen > len) 5637 return; 5638 5639 parse_params.start = variable; 5640 parse_params.len = len - baselen; 5641 5642 rcu_read_lock(); 5643 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5644 if (!chanctx_conf) { 5645 rcu_read_unlock(); 5646 return; 5647 } 5648 5649 if (ieee80211_rx_status_to_khz(rx_status) != 5650 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5651 rcu_read_unlock(); 5652 return; 5653 } 5654 chan = chanctx_conf->def.chan; 5655 rcu_read_unlock(); 5656 5657 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5658 !WARN_ON(sdata->vif.valid_links) && 5659 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5660 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5661 elems = ieee802_11_parse_elems_full(&parse_params); 5662 if (!elems) 5663 return; 5664 5665 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5666 5667 if (elems->dtim_period) 5668 link->u.mgd.dtim_period = elems->dtim_period; 5669 link->u.mgd.have_beacon = true; 5670 ifmgd->assoc_data->need_beacon = false; 5671 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5672 link->conf->sync_tsf = 5673 le64_to_cpu(mgmt->u.beacon.timestamp); 5674 link->conf->sync_device_ts = 5675 rx_status->device_timestamp; 5676 link->conf->sync_dtim_count = elems->dtim_count; 5677 } 5678 5679 if (elems->mbssid_config_ie) 5680 bss_conf->profile_periodicity = 5681 elems->mbssid_config_ie->profile_periodicity; 5682 else 5683 bss_conf->profile_periodicity = 0; 5684 5685 if (elems->ext_capab_len >= 11 && 5686 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5687 bss_conf->ema_ap = true; 5688 else 5689 bss_conf->ema_ap = false; 5690 5691 /* continue assoc process */ 5692 ifmgd->assoc_data->timeout = jiffies; 5693 ifmgd->assoc_data->timeout_started = true; 5694 run_again(sdata, ifmgd->assoc_data->timeout); 5695 kfree(elems); 5696 return; 5697 } 5698 5699 if (!ifmgd->associated || 5700 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5701 return; 5702 bssid = link->u.mgd.bssid; 5703 5704 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5705 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5706 local, rx_status); 5707 5708 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5709 mlme_dbg_ratelimited(sdata, 5710 "cancelling AP probe due to a received beacon\n"); 5711 ieee80211_reset_ap_probe(sdata); 5712 } 5713 5714 /* 5715 * Push the beacon loss detection into the future since 5716 * we are processing a beacon from the AP just now. 5717 */ 5718 ieee80211_sta_reset_beacon_monitor(sdata); 5719 5720 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5721 * element (which carries the beacon interval). Don't forget to add a 5722 * bit to care_about_ies[] above if mac80211 is interested in a 5723 * changing S1G element. 5724 */ 5725 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5726 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5727 parse_params.bss = link->u.mgd.bss; 5728 parse_params.filter = care_about_ies; 5729 parse_params.crc = ncrc; 5730 elems = ieee802_11_parse_elems_full(&parse_params); 5731 if (!elems) 5732 return; 5733 ncrc = elems->crc; 5734 5735 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5736 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5737 if (local->hw.conf.dynamic_ps_timeout > 0) { 5738 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5739 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5740 ieee80211_hw_config(local, 5741 IEEE80211_CONF_CHANGE_PS); 5742 } 5743 ieee80211_send_nullfunc(local, sdata, false); 5744 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5745 local->pspolling = true; 5746 5747 /* 5748 * Here is assumed that the driver will be 5749 * able to send ps-poll frame and receive a 5750 * response even though power save mode is 5751 * enabled, but some drivers might require 5752 * to disable power save here. This needs 5753 * to be investigated. 5754 */ 5755 ieee80211_send_pspoll(local, sdata); 5756 } 5757 } 5758 5759 if (sdata->vif.p2p || 5760 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5761 struct ieee80211_p2p_noa_attr noa = {}; 5762 int ret; 5763 5764 ret = cfg80211_get_p2p_attr(variable, 5765 len - baselen, 5766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5767 (u8 *) &noa, sizeof(noa)); 5768 if (ret >= 2) { 5769 if (link->u.mgd.p2p_noa_index != noa.index) { 5770 /* valid noa_attr and index changed */ 5771 link->u.mgd.p2p_noa_index = noa.index; 5772 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5773 changed |= BSS_CHANGED_P2P_PS; 5774 /* 5775 * make sure we update all information, the CRC 5776 * mechanism doesn't look at P2P attributes. 5777 */ 5778 link->u.mgd.beacon_crc_valid = false; 5779 } 5780 } else if (link->u.mgd.p2p_noa_index != -1) { 5781 /* noa_attr not found and we had valid noa_attr before */ 5782 link->u.mgd.p2p_noa_index = -1; 5783 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5784 changed |= BSS_CHANGED_P2P_PS; 5785 link->u.mgd.beacon_crc_valid = false; 5786 } 5787 } 5788 5789 if (link->u.mgd.csa_waiting_bcn) 5790 ieee80211_chswitch_post_beacon(link); 5791 5792 /* 5793 * Update beacon timing and dtim count on every beacon appearance. This 5794 * will allow the driver to use the most updated values. Do it before 5795 * comparing this one with last received beacon. 5796 * IMPORTANT: These parameters would possibly be out of sync by the time 5797 * the driver will use them. The synchronized view is currently 5798 * guaranteed only in certain callbacks. 5799 */ 5800 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5801 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5802 link->conf->sync_tsf = 5803 le64_to_cpu(mgmt->u.beacon.timestamp); 5804 link->conf->sync_device_ts = 5805 rx_status->device_timestamp; 5806 link->conf->sync_dtim_count = elems->dtim_count; 5807 } 5808 5809 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5810 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5811 goto free; 5812 link->u.mgd.beacon_crc = ncrc; 5813 link->u.mgd.beacon_crc_valid = true; 5814 5815 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5816 5817 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5818 rx_status->device_timestamp, 5819 elems, true); 5820 5821 if (!link->u.mgd.disable_wmm_tracking && 5822 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5823 elems->wmm_param_len, 5824 elems->mu_edca_param_set)) 5825 changed |= BSS_CHANGED_QOS; 5826 5827 /* 5828 * If we haven't had a beacon before, tell the driver about the 5829 * DTIM period (and beacon timing if desired) now. 5830 */ 5831 if (!link->u.mgd.have_beacon) { 5832 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5833 bss_conf->dtim_period = elems->dtim_period ?: 1; 5834 5835 changed |= BSS_CHANGED_BEACON_INFO; 5836 link->u.mgd.have_beacon = true; 5837 5838 mutex_lock(&local->iflist_mtx); 5839 ieee80211_recalc_ps(local); 5840 mutex_unlock(&local->iflist_mtx); 5841 5842 ieee80211_recalc_ps_vif(sdata); 5843 } 5844 5845 if (elems->erp_info) { 5846 erp_valid = true; 5847 erp_value = elems->erp_info[0]; 5848 } else { 5849 erp_valid = false; 5850 } 5851 5852 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5853 changed |= ieee80211_handle_bss_capability(link, 5854 le16_to_cpu(mgmt->u.beacon.capab_info), 5855 erp_valid, erp_value); 5856 5857 mutex_lock(&local->sta_mtx); 5858 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5859 if (WARN_ON(!sta)) { 5860 mutex_unlock(&local->sta_mtx); 5861 goto free; 5862 } 5863 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5864 lockdep_is_held(&local->sta_mtx)); 5865 if (WARN_ON(!link_sta)) { 5866 mutex_unlock(&local->sta_mtx); 5867 goto free; 5868 } 5869 5870 if (WARN_ON(!link->conf->chandef.chan)) 5871 goto free; 5872 5873 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5874 5875 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5876 5877 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5878 elems->vht_cap_elem, elems->ht_operation, 5879 elems->vht_operation, elems->he_operation, 5880 elems->eht_operation, 5881 elems->s1g_oper, bssid, &changed)) { 5882 mutex_unlock(&local->sta_mtx); 5883 sdata_info(sdata, 5884 "failed to follow AP %pM bandwidth change, disconnect\n", 5885 bssid); 5886 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5887 WLAN_REASON_DEAUTH_LEAVING, 5888 true, deauth_buf); 5889 ieee80211_report_disconnect(sdata, deauth_buf, 5890 sizeof(deauth_buf), true, 5891 WLAN_REASON_DEAUTH_LEAVING, 5892 false); 5893 goto free; 5894 } 5895 5896 if (elems->opmode_notif) 5897 ieee80211_vht_handle_opmode(sdata, link_sta, 5898 *elems->opmode_notif, 5899 rx_status->band); 5900 mutex_unlock(&local->sta_mtx); 5901 5902 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5903 elems->country_elem, 5904 elems->country_elem_len, 5905 elems->pwr_constr_elem, 5906 elems->cisco_dtpc_elem); 5907 5908 if (elems->eht_operation && 5909 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 5910 if (!ieee80211_config_puncturing(link, elems->eht_operation, 5911 &changed)) { 5912 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5913 WLAN_REASON_DEAUTH_LEAVING, 5914 true, deauth_buf); 5915 ieee80211_report_disconnect(sdata, deauth_buf, 5916 sizeof(deauth_buf), true, 5917 WLAN_REASON_DEAUTH_LEAVING, 5918 false); 5919 goto free; 5920 } 5921 } 5922 5923 ieee80211_link_info_change_notify(sdata, link, changed); 5924 free: 5925 kfree(elems); 5926 } 5927 5928 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5929 struct sk_buff *skb) 5930 { 5931 struct ieee80211_link_data *link = &sdata->deflink; 5932 struct ieee80211_rx_status *rx_status; 5933 struct ieee80211_hdr *hdr; 5934 u16 fc; 5935 5936 rx_status = (struct ieee80211_rx_status *) skb->cb; 5937 hdr = (struct ieee80211_hdr *) skb->data; 5938 fc = le16_to_cpu(hdr->frame_control); 5939 5940 sdata_lock(sdata); 5941 switch (fc & IEEE80211_FCTL_STYPE) { 5942 case IEEE80211_STYPE_S1G_BEACON: 5943 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5944 break; 5945 } 5946 sdata_unlock(sdata); 5947 } 5948 5949 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5950 struct sk_buff *skb) 5951 { 5952 struct ieee80211_link_data *link = &sdata->deflink; 5953 struct ieee80211_rx_status *rx_status; 5954 struct ieee80211_mgmt *mgmt; 5955 u16 fc; 5956 int ies_len; 5957 5958 rx_status = (struct ieee80211_rx_status *) skb->cb; 5959 mgmt = (struct ieee80211_mgmt *) skb->data; 5960 fc = le16_to_cpu(mgmt->frame_control); 5961 5962 sdata_lock(sdata); 5963 5964 if (rx_status->link_valid) { 5965 link = sdata_dereference(sdata->link[rx_status->link_id], 5966 sdata); 5967 if (!link) 5968 goto out; 5969 } 5970 5971 switch (fc & IEEE80211_FCTL_STYPE) { 5972 case IEEE80211_STYPE_BEACON: 5973 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5974 skb->len, rx_status); 5975 break; 5976 case IEEE80211_STYPE_PROBE_RESP: 5977 ieee80211_rx_mgmt_probe_resp(link, skb); 5978 break; 5979 case IEEE80211_STYPE_AUTH: 5980 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5981 break; 5982 case IEEE80211_STYPE_DEAUTH: 5983 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5984 break; 5985 case IEEE80211_STYPE_DISASSOC: 5986 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5987 break; 5988 case IEEE80211_STYPE_ASSOC_RESP: 5989 case IEEE80211_STYPE_REASSOC_RESP: 5990 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5991 break; 5992 case IEEE80211_STYPE_ACTION: 5993 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 5994 struct ieee802_11_elems *elems; 5995 5996 ies_len = skb->len - 5997 offsetof(struct ieee80211_mgmt, 5998 u.action.u.chan_switch.variable); 5999 6000 if (ies_len < 0) 6001 break; 6002 6003 /* CSA IE cannot be overridden, no need for BSSID */ 6004 elems = ieee802_11_parse_elems( 6005 mgmt->u.action.u.chan_switch.variable, 6006 ies_len, true, NULL); 6007 6008 if (elems && !elems->parse_error) 6009 ieee80211_sta_process_chanswitch(link, 6010 rx_status->mactime, 6011 rx_status->device_timestamp, 6012 elems, false); 6013 kfree(elems); 6014 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6015 struct ieee802_11_elems *elems; 6016 6017 ies_len = skb->len - 6018 offsetof(struct ieee80211_mgmt, 6019 u.action.u.ext_chan_switch.variable); 6020 6021 if (ies_len < 0) 6022 break; 6023 6024 /* 6025 * extended CSA IE can't be overridden, no need for 6026 * BSSID 6027 */ 6028 elems = ieee802_11_parse_elems( 6029 mgmt->u.action.u.ext_chan_switch.variable, 6030 ies_len, true, NULL); 6031 6032 if (elems && !elems->parse_error) { 6033 /* for the handling code pretend it was an IE */ 6034 elems->ext_chansw_ie = 6035 &mgmt->u.action.u.ext_chan_switch.data; 6036 6037 ieee80211_sta_process_chanswitch(link, 6038 rx_status->mactime, 6039 rx_status->device_timestamp, 6040 elems, false); 6041 } 6042 6043 kfree(elems); 6044 } 6045 break; 6046 } 6047 out: 6048 sdata_unlock(sdata); 6049 } 6050 6051 static void ieee80211_sta_timer(struct timer_list *t) 6052 { 6053 struct ieee80211_sub_if_data *sdata = 6054 from_timer(sdata, t, u.mgd.timer); 6055 6056 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 6057 } 6058 6059 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6060 u8 reason, bool tx) 6061 { 6062 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6063 6064 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6065 tx, frame_buf); 6066 6067 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6068 reason, false); 6069 } 6070 6071 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6072 { 6073 struct ieee80211_local *local = sdata->local; 6074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6075 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6076 u32 tx_flags = 0; 6077 u16 trans = 1; 6078 u16 status = 0; 6079 struct ieee80211_prep_tx_info info = { 6080 .subtype = IEEE80211_STYPE_AUTH, 6081 }; 6082 6083 sdata_assert_lock(sdata); 6084 6085 if (WARN_ON_ONCE(!auth_data)) 6086 return -EINVAL; 6087 6088 auth_data->tries++; 6089 6090 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6091 sdata_info(sdata, "authentication with %pM timed out\n", 6092 auth_data->ap_addr); 6093 6094 /* 6095 * Most likely AP is not in the range so remove the 6096 * bss struct for that AP. 6097 */ 6098 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6099 6100 return -ETIMEDOUT; 6101 } 6102 6103 if (auth_data->algorithm == WLAN_AUTH_SAE) 6104 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6105 6106 drv_mgd_prepare_tx(local, sdata, &info); 6107 6108 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6109 auth_data->ap_addr, auth_data->tries, 6110 IEEE80211_AUTH_MAX_TRIES); 6111 6112 auth_data->expected_transaction = 2; 6113 6114 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6115 trans = auth_data->sae_trans; 6116 status = auth_data->sae_status; 6117 auth_data->expected_transaction = trans; 6118 } 6119 6120 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6121 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6122 IEEE80211_TX_INTFL_MLME_CONN_TX; 6123 6124 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6125 auth_data->data, auth_data->data_len, 6126 auth_data->ap_addr, auth_data->ap_addr, 6127 NULL, 0, 0, tx_flags); 6128 6129 if (tx_flags == 0) { 6130 if (auth_data->algorithm == WLAN_AUTH_SAE) 6131 auth_data->timeout = jiffies + 6132 IEEE80211_AUTH_TIMEOUT_SAE; 6133 else 6134 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6135 } else { 6136 auth_data->timeout = 6137 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6138 } 6139 6140 auth_data->timeout_started = true; 6141 run_again(sdata, auth_data->timeout); 6142 6143 return 0; 6144 } 6145 6146 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6147 { 6148 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6149 struct ieee80211_local *local = sdata->local; 6150 int ret; 6151 6152 sdata_assert_lock(sdata); 6153 6154 assoc_data->tries++; 6155 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6156 sdata_info(sdata, "association with %pM timed out\n", 6157 assoc_data->ap_addr); 6158 6159 /* 6160 * Most likely AP is not in the range so remove the 6161 * bss struct for that AP. 6162 */ 6163 cfg80211_unlink_bss(local->hw.wiphy, 6164 assoc_data->link[assoc_data->assoc_link_id].bss); 6165 6166 return -ETIMEDOUT; 6167 } 6168 6169 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6170 assoc_data->ap_addr, assoc_data->tries, 6171 IEEE80211_ASSOC_MAX_TRIES); 6172 ret = ieee80211_send_assoc(sdata); 6173 if (ret) 6174 return ret; 6175 6176 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6177 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6178 assoc_data->timeout_started = true; 6179 run_again(sdata, assoc_data->timeout); 6180 } else { 6181 assoc_data->timeout = 6182 round_jiffies_up(jiffies + 6183 IEEE80211_ASSOC_TIMEOUT_LONG); 6184 assoc_data->timeout_started = true; 6185 run_again(sdata, assoc_data->timeout); 6186 } 6187 6188 return 0; 6189 } 6190 6191 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6192 __le16 fc, bool acked) 6193 { 6194 struct ieee80211_local *local = sdata->local; 6195 6196 sdata->u.mgd.status_fc = fc; 6197 sdata->u.mgd.status_acked = acked; 6198 sdata->u.mgd.status_received = true; 6199 6200 ieee80211_queue_work(&local->hw, &sdata->work); 6201 } 6202 6203 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6204 { 6205 struct ieee80211_local *local = sdata->local; 6206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6207 6208 sdata_lock(sdata); 6209 6210 if (ifmgd->status_received) { 6211 __le16 fc = ifmgd->status_fc; 6212 bool status_acked = ifmgd->status_acked; 6213 6214 ifmgd->status_received = false; 6215 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6216 if (status_acked) { 6217 if (ifmgd->auth_data->algorithm == 6218 WLAN_AUTH_SAE) 6219 ifmgd->auth_data->timeout = 6220 jiffies + 6221 IEEE80211_AUTH_TIMEOUT_SAE; 6222 else 6223 ifmgd->auth_data->timeout = 6224 jiffies + 6225 IEEE80211_AUTH_TIMEOUT_SHORT; 6226 run_again(sdata, ifmgd->auth_data->timeout); 6227 } else { 6228 ifmgd->auth_data->timeout = jiffies - 1; 6229 } 6230 ifmgd->auth_data->timeout_started = true; 6231 } else if (ifmgd->assoc_data && 6232 (ieee80211_is_assoc_req(fc) || 6233 ieee80211_is_reassoc_req(fc))) { 6234 if (status_acked) { 6235 ifmgd->assoc_data->timeout = 6236 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6237 run_again(sdata, ifmgd->assoc_data->timeout); 6238 } else { 6239 ifmgd->assoc_data->timeout = jiffies - 1; 6240 } 6241 ifmgd->assoc_data->timeout_started = true; 6242 } 6243 } 6244 6245 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6246 time_after(jiffies, ifmgd->auth_data->timeout)) { 6247 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6248 /* 6249 * ok ... we waited for assoc or continuation but 6250 * userspace didn't do it, so kill the auth data 6251 */ 6252 ieee80211_destroy_auth_data(sdata, false); 6253 } else if (ieee80211_auth(sdata)) { 6254 u8 ap_addr[ETH_ALEN]; 6255 struct ieee80211_event event = { 6256 .type = MLME_EVENT, 6257 .u.mlme.data = AUTH_EVENT, 6258 .u.mlme.status = MLME_TIMEOUT, 6259 }; 6260 6261 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6262 6263 ieee80211_destroy_auth_data(sdata, false); 6264 6265 cfg80211_auth_timeout(sdata->dev, ap_addr); 6266 drv_event_callback(sdata->local, sdata, &event); 6267 } 6268 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6269 run_again(sdata, ifmgd->auth_data->timeout); 6270 6271 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6272 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6273 if ((ifmgd->assoc_data->need_beacon && 6274 !sdata->deflink.u.mgd.have_beacon) || 6275 ieee80211_do_assoc(sdata)) { 6276 struct ieee80211_event event = { 6277 .type = MLME_EVENT, 6278 .u.mlme.data = ASSOC_EVENT, 6279 .u.mlme.status = MLME_TIMEOUT, 6280 }; 6281 6282 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6283 drv_event_callback(sdata->local, sdata, &event); 6284 } 6285 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6286 run_again(sdata, ifmgd->assoc_data->timeout); 6287 6288 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6289 ifmgd->associated) { 6290 u8 *bssid = sdata->deflink.u.mgd.bssid; 6291 int max_tries; 6292 6293 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6294 max_tries = max_nullfunc_tries; 6295 else 6296 max_tries = max_probe_tries; 6297 6298 /* ACK received for nullfunc probing frame */ 6299 if (!ifmgd->probe_send_count) 6300 ieee80211_reset_ap_probe(sdata); 6301 else if (ifmgd->nullfunc_failed) { 6302 if (ifmgd->probe_send_count < max_tries) { 6303 mlme_dbg(sdata, 6304 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6305 bssid, ifmgd->probe_send_count, 6306 max_tries); 6307 ieee80211_mgd_probe_ap_send(sdata); 6308 } else { 6309 mlme_dbg(sdata, 6310 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6311 bssid); 6312 ieee80211_sta_connection_lost(sdata, 6313 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6314 false); 6315 } 6316 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6317 run_again(sdata, ifmgd->probe_timeout); 6318 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6319 mlme_dbg(sdata, 6320 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6321 bssid, probe_wait_ms); 6322 ieee80211_sta_connection_lost(sdata, 6323 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6324 } else if (ifmgd->probe_send_count < max_tries) { 6325 mlme_dbg(sdata, 6326 "No probe response from AP %pM after %dms, try %d/%i\n", 6327 bssid, probe_wait_ms, 6328 ifmgd->probe_send_count, max_tries); 6329 ieee80211_mgd_probe_ap_send(sdata); 6330 } else { 6331 /* 6332 * We actually lost the connection ... or did we? 6333 * Let's make sure! 6334 */ 6335 mlme_dbg(sdata, 6336 "No probe response from AP %pM after %dms, disconnecting.\n", 6337 bssid, probe_wait_ms); 6338 6339 ieee80211_sta_connection_lost(sdata, 6340 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6341 } 6342 } 6343 6344 sdata_unlock(sdata); 6345 } 6346 6347 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6348 { 6349 struct ieee80211_sub_if_data *sdata = 6350 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6351 6352 if (WARN_ON(sdata->vif.valid_links)) 6353 return; 6354 6355 if (sdata->vif.bss_conf.csa_active && 6356 !sdata->deflink.u.mgd.csa_waiting_bcn) 6357 return; 6358 6359 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6360 return; 6361 6362 sdata->u.mgd.connection_loss = false; 6363 ieee80211_queue_work(&sdata->local->hw, 6364 &sdata->u.mgd.beacon_connection_loss_work); 6365 } 6366 6367 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6368 { 6369 struct ieee80211_sub_if_data *sdata = 6370 from_timer(sdata, t, u.mgd.conn_mon_timer); 6371 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6372 struct ieee80211_local *local = sdata->local; 6373 struct sta_info *sta; 6374 unsigned long timeout; 6375 6376 if (WARN_ON(sdata->vif.valid_links)) 6377 return; 6378 6379 if (sdata->vif.bss_conf.csa_active && 6380 !sdata->deflink.u.mgd.csa_waiting_bcn) 6381 return; 6382 6383 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6384 if (!sta) 6385 return; 6386 6387 timeout = sta->deflink.status_stats.last_ack; 6388 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6389 timeout = sta->deflink.rx_stats.last_rx; 6390 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6391 6392 /* If timeout is after now, then update timer to fire at 6393 * the later date, but do not actually probe at this time. 6394 */ 6395 if (time_is_after_jiffies(timeout)) { 6396 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6397 return; 6398 } 6399 6400 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6401 } 6402 6403 static void ieee80211_sta_monitor_work(struct work_struct *work) 6404 { 6405 struct ieee80211_sub_if_data *sdata = 6406 container_of(work, struct ieee80211_sub_if_data, 6407 u.mgd.monitor_work); 6408 6409 ieee80211_mgd_probe_ap(sdata, false); 6410 } 6411 6412 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6413 { 6414 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6415 __ieee80211_stop_poll(sdata); 6416 6417 /* let's probe the connection once */ 6418 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6419 ieee80211_queue_work(&sdata->local->hw, 6420 &sdata->u.mgd.monitor_work); 6421 } 6422 } 6423 6424 #ifdef CONFIG_PM 6425 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6426 { 6427 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6428 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6429 6430 sdata_lock(sdata); 6431 6432 if (ifmgd->auth_data || ifmgd->assoc_data) { 6433 const u8 *ap_addr = ifmgd->auth_data ? 6434 ifmgd->auth_data->ap_addr : 6435 ifmgd->assoc_data->ap_addr; 6436 6437 /* 6438 * If we are trying to authenticate / associate while suspending, 6439 * cfg80211 won't know and won't actually abort those attempts, 6440 * thus we need to do that ourselves. 6441 */ 6442 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6443 IEEE80211_STYPE_DEAUTH, 6444 WLAN_REASON_DEAUTH_LEAVING, 6445 false, frame_buf); 6446 if (ifmgd->assoc_data) 6447 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6448 if (ifmgd->auth_data) 6449 ieee80211_destroy_auth_data(sdata, false); 6450 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6451 IEEE80211_DEAUTH_FRAME_LEN, 6452 false); 6453 } 6454 6455 /* This is a bit of a hack - we should find a better and more generic 6456 * solution to this. Normally when suspending, cfg80211 will in fact 6457 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6458 * auth (not so important) or assoc (this is the problem) process. 6459 * 6460 * As a consequence, it can happen that we are in the process of both 6461 * associating and suspending, and receive an association response 6462 * after cfg80211 has checked if it needs to disconnect, but before 6463 * we actually set the flag to drop incoming frames. This will then 6464 * cause the workqueue flush to process the association response in 6465 * the suspend, resulting in a successful association just before it 6466 * tries to remove the interface from the driver, which now though 6467 * has a channel context assigned ... this results in issues. 6468 * 6469 * To work around this (for now) simply deauth here again if we're 6470 * now connected. 6471 */ 6472 if (ifmgd->associated && !sdata->local->wowlan) { 6473 u8 bssid[ETH_ALEN]; 6474 struct cfg80211_deauth_request req = { 6475 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6476 .bssid = bssid, 6477 }; 6478 6479 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6480 ieee80211_mgd_deauth(sdata, &req); 6481 } 6482 6483 sdata_unlock(sdata); 6484 } 6485 #endif 6486 6487 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6488 { 6489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6490 6491 sdata_lock(sdata); 6492 if (!ifmgd->associated) { 6493 sdata_unlock(sdata); 6494 return; 6495 } 6496 6497 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6498 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6499 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6500 ieee80211_sta_connection_lost(sdata, 6501 WLAN_REASON_UNSPECIFIED, 6502 true); 6503 sdata_unlock(sdata); 6504 return; 6505 } 6506 6507 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6508 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6509 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6510 ieee80211_sta_connection_lost(sdata, 6511 WLAN_REASON_UNSPECIFIED, 6512 true); 6513 sdata_unlock(sdata); 6514 return; 6515 } 6516 6517 sdata_unlock(sdata); 6518 } 6519 6520 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6521 { 6522 struct ieee80211_link_data *link = 6523 container_of(work, struct ieee80211_link_data, 6524 u.mgd.request_smps_work); 6525 6526 sdata_lock(link->sdata); 6527 __ieee80211_request_smps_mgd(link->sdata, link, 6528 link->u.mgd.driver_smps_mode); 6529 sdata_unlock(link->sdata); 6530 } 6531 6532 /* interface setup */ 6533 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6534 { 6535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6536 6537 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6538 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6539 ieee80211_beacon_connection_loss_work); 6540 INIT_WORK(&ifmgd->csa_connection_drop_work, 6541 ieee80211_csa_connection_drop_work); 6542 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6543 ieee80211_tdls_peer_del_work); 6544 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6545 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6546 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6547 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6548 ieee80211_sta_handle_tspec_ac_params_wk); 6549 6550 ifmgd->flags = 0; 6551 ifmgd->powersave = sdata->wdev.ps; 6552 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6553 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6554 /* Setup TDLS data */ 6555 spin_lock_init(&ifmgd->teardown_lock); 6556 ifmgd->teardown_skb = NULL; 6557 ifmgd->orig_teardown_skb = NULL; 6558 } 6559 6560 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6561 { 6562 struct ieee80211_sub_if_data *sdata = link->sdata; 6563 struct ieee80211_local *local = sdata->local; 6564 unsigned int link_id = link->link_id; 6565 6566 link->u.mgd.p2p_noa_index = -1; 6567 link->u.mgd.conn_flags = 0; 6568 link->conf->bssid = link->u.mgd.bssid; 6569 6570 INIT_WORK(&link->u.mgd.request_smps_work, 6571 ieee80211_request_smps_mgd_work); 6572 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6573 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6574 else 6575 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6576 6577 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6578 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6579 6580 if (sdata->u.mgd.assoc_data) 6581 ether_addr_copy(link->conf->addr, 6582 sdata->u.mgd.assoc_data->link[link_id].addr); 6583 else if (!is_valid_ether_addr(link->conf->addr)) 6584 eth_random_addr(link->conf->addr); 6585 } 6586 6587 /* scan finished notification */ 6588 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6589 { 6590 struct ieee80211_sub_if_data *sdata; 6591 6592 /* Restart STA timers */ 6593 rcu_read_lock(); 6594 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6595 if (ieee80211_sdata_running(sdata)) 6596 ieee80211_restart_sta_timer(sdata); 6597 } 6598 rcu_read_unlock(); 6599 } 6600 6601 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6602 struct cfg80211_bss *cbss, s8 link_id, 6603 const u8 *ap_mld_addr, bool assoc, 6604 bool override) 6605 { 6606 struct ieee80211_local *local = sdata->local; 6607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6608 struct ieee80211_bss *bss = (void *)cbss->priv; 6609 struct sta_info *new_sta = NULL; 6610 struct ieee80211_link_data *link; 6611 bool have_sta = false; 6612 bool mlo; 6613 int err; 6614 6615 if (link_id >= 0) { 6616 mlo = true; 6617 if (WARN_ON(!ap_mld_addr)) 6618 return -EINVAL; 6619 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6620 } else { 6621 if (WARN_ON(ap_mld_addr)) 6622 return -EINVAL; 6623 ap_mld_addr = cbss->bssid; 6624 err = ieee80211_vif_set_links(sdata, 0); 6625 link_id = 0; 6626 mlo = false; 6627 } 6628 6629 if (err) 6630 return err; 6631 6632 link = sdata_dereference(sdata->link[link_id], sdata); 6633 if (WARN_ON(!link)) { 6634 err = -ENOLINK; 6635 goto out_err; 6636 } 6637 6638 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6639 err = -EINVAL; 6640 goto out_err; 6641 } 6642 6643 /* If a reconfig is happening, bail out */ 6644 if (local->in_reconfig) { 6645 err = -EBUSY; 6646 goto out_err; 6647 } 6648 6649 if (assoc) { 6650 rcu_read_lock(); 6651 have_sta = sta_info_get(sdata, ap_mld_addr); 6652 rcu_read_unlock(); 6653 } 6654 6655 if (!have_sta) { 6656 if (mlo) 6657 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6658 link_id, cbss->bssid, 6659 GFP_KERNEL); 6660 else 6661 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6662 6663 if (!new_sta) { 6664 err = -ENOMEM; 6665 goto out_err; 6666 } 6667 6668 new_sta->sta.mlo = mlo; 6669 } 6670 6671 /* 6672 * Set up the information for the new channel before setting the 6673 * new channel. We can't - completely race-free - change the basic 6674 * rates bitmap and the channel (sband) that it refers to, but if 6675 * we set it up before we at least avoid calling into the driver's 6676 * bss_info_changed() method with invalid information (since we do 6677 * call that from changing the channel - only for IDLE and perhaps 6678 * some others, but ...). 6679 * 6680 * So to avoid that, just set up all the new information before the 6681 * channel, but tell the driver to apply it only afterwards, since 6682 * it might need the new channel for that. 6683 */ 6684 if (new_sta) { 6685 const struct cfg80211_bss_ies *ies; 6686 struct link_sta_info *link_sta; 6687 6688 rcu_read_lock(); 6689 link_sta = rcu_dereference(new_sta->link[link_id]); 6690 if (WARN_ON(!link_sta)) { 6691 rcu_read_unlock(); 6692 sta_info_free(local, new_sta); 6693 err = -EINVAL; 6694 goto out_err; 6695 } 6696 6697 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6698 link_sta, cbss); 6699 if (err) { 6700 rcu_read_unlock(); 6701 sta_info_free(local, new_sta); 6702 goto out_err; 6703 } 6704 6705 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6706 6707 /* set timing information */ 6708 link->conf->beacon_int = cbss->beacon_interval; 6709 ies = rcu_dereference(cbss->beacon_ies); 6710 if (ies) { 6711 link->conf->sync_tsf = ies->tsf; 6712 link->conf->sync_device_ts = 6713 bss->device_ts_beacon; 6714 6715 ieee80211_get_dtim(ies, 6716 &link->conf->sync_dtim_count, 6717 NULL); 6718 } else if (!ieee80211_hw_check(&sdata->local->hw, 6719 TIMING_BEACON_ONLY)) { 6720 ies = rcu_dereference(cbss->proberesp_ies); 6721 /* must be non-NULL since beacon IEs were NULL */ 6722 link->conf->sync_tsf = ies->tsf; 6723 link->conf->sync_device_ts = 6724 bss->device_ts_presp; 6725 link->conf->sync_dtim_count = 0; 6726 } else { 6727 link->conf->sync_tsf = 0; 6728 link->conf->sync_device_ts = 0; 6729 link->conf->sync_dtim_count = 0; 6730 } 6731 rcu_read_unlock(); 6732 } 6733 6734 if (new_sta || override) { 6735 err = ieee80211_prep_channel(sdata, link, cbss, 6736 &link->u.mgd.conn_flags); 6737 if (err) { 6738 if (new_sta) 6739 sta_info_free(local, new_sta); 6740 goto out_err; 6741 } 6742 } 6743 6744 if (new_sta) { 6745 /* 6746 * tell driver about BSSID, basic rates and timing 6747 * this was set up above, before setting the channel 6748 */ 6749 ieee80211_link_info_change_notify(sdata, link, 6750 BSS_CHANGED_BSSID | 6751 BSS_CHANGED_BASIC_RATES | 6752 BSS_CHANGED_BEACON_INT); 6753 6754 if (assoc) 6755 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6756 6757 err = sta_info_insert(new_sta); 6758 new_sta = NULL; 6759 if (err) { 6760 sdata_info(sdata, 6761 "failed to insert STA entry for the AP (error %d)\n", 6762 err); 6763 goto out_err; 6764 } 6765 } else 6766 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6767 6768 /* Cancel scan to ensure that nothing interferes with connection */ 6769 if (local->scanning) 6770 ieee80211_scan_cancel(local); 6771 6772 return 0; 6773 6774 out_err: 6775 ieee80211_link_release_channel(&sdata->deflink); 6776 ieee80211_vif_set_links(sdata, 0); 6777 return err; 6778 } 6779 6780 /* config hooks */ 6781 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6782 struct cfg80211_auth_request *req) 6783 { 6784 struct ieee80211_local *local = sdata->local; 6785 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6786 struct ieee80211_mgd_auth_data *auth_data; 6787 u16 auth_alg; 6788 int err; 6789 bool cont_auth; 6790 6791 /* prepare auth data structure */ 6792 6793 switch (req->auth_type) { 6794 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6795 auth_alg = WLAN_AUTH_OPEN; 6796 break; 6797 case NL80211_AUTHTYPE_SHARED_KEY: 6798 if (fips_enabled) 6799 return -EOPNOTSUPP; 6800 auth_alg = WLAN_AUTH_SHARED_KEY; 6801 break; 6802 case NL80211_AUTHTYPE_FT: 6803 auth_alg = WLAN_AUTH_FT; 6804 break; 6805 case NL80211_AUTHTYPE_NETWORK_EAP: 6806 auth_alg = WLAN_AUTH_LEAP; 6807 break; 6808 case NL80211_AUTHTYPE_SAE: 6809 auth_alg = WLAN_AUTH_SAE; 6810 break; 6811 case NL80211_AUTHTYPE_FILS_SK: 6812 auth_alg = WLAN_AUTH_FILS_SK; 6813 break; 6814 case NL80211_AUTHTYPE_FILS_SK_PFS: 6815 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6816 break; 6817 case NL80211_AUTHTYPE_FILS_PK: 6818 auth_alg = WLAN_AUTH_FILS_PK; 6819 break; 6820 default: 6821 return -EOPNOTSUPP; 6822 } 6823 6824 if (ifmgd->assoc_data) 6825 return -EBUSY; 6826 6827 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6828 req->ie_len, GFP_KERNEL); 6829 if (!auth_data) 6830 return -ENOMEM; 6831 6832 memcpy(auth_data->ap_addr, 6833 req->ap_mld_addr ?: req->bss->bssid, 6834 ETH_ALEN); 6835 auth_data->bss = req->bss; 6836 auth_data->link_id = req->link_id; 6837 6838 if (req->auth_data_len >= 4) { 6839 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6840 __le16 *pos = (__le16 *) req->auth_data; 6841 6842 auth_data->sae_trans = le16_to_cpu(pos[0]); 6843 auth_data->sae_status = le16_to_cpu(pos[1]); 6844 } 6845 memcpy(auth_data->data, req->auth_data + 4, 6846 req->auth_data_len - 4); 6847 auth_data->data_len += req->auth_data_len - 4; 6848 } 6849 6850 /* Check if continuing authentication or trying to authenticate with the 6851 * same BSS that we were in the process of authenticating with and avoid 6852 * removal and re-addition of the STA entry in 6853 * ieee80211_prep_connection(). 6854 */ 6855 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6856 ifmgd->auth_data->link_id == req->link_id; 6857 6858 if (req->ie && req->ie_len) { 6859 memcpy(&auth_data->data[auth_data->data_len], 6860 req->ie, req->ie_len); 6861 auth_data->data_len += req->ie_len; 6862 } 6863 6864 if (req->key && req->key_len) { 6865 auth_data->key_len = req->key_len; 6866 auth_data->key_idx = req->key_idx; 6867 memcpy(auth_data->key, req->key, req->key_len); 6868 } 6869 6870 auth_data->algorithm = auth_alg; 6871 6872 /* try to authenticate/probe */ 6873 6874 if (ifmgd->auth_data) { 6875 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6876 auth_data->peer_confirmed = 6877 ifmgd->auth_data->peer_confirmed; 6878 } 6879 ieee80211_destroy_auth_data(sdata, cont_auth); 6880 } 6881 6882 /* prep auth_data so we don't go into idle on disassoc */ 6883 ifmgd->auth_data = auth_data; 6884 6885 /* If this is continuation of an ongoing SAE authentication exchange 6886 * (i.e., request to send SAE Confirm) and the peer has already 6887 * confirmed, mark authentication completed since we are about to send 6888 * out SAE Confirm. 6889 */ 6890 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6891 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6892 ieee80211_mark_sta_auth(sdata); 6893 6894 if (ifmgd->associated) { 6895 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6896 6897 sdata_info(sdata, 6898 "disconnect from AP %pM for new auth to %pM\n", 6899 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6900 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6901 WLAN_REASON_UNSPECIFIED, 6902 false, frame_buf); 6903 6904 ieee80211_report_disconnect(sdata, frame_buf, 6905 sizeof(frame_buf), true, 6906 WLAN_REASON_UNSPECIFIED, 6907 false); 6908 } 6909 6910 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6911 6912 /* needed for transmitting the auth frame(s) properly */ 6913 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6914 6915 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6916 req->ap_mld_addr, cont_auth, false); 6917 if (err) 6918 goto err_clear; 6919 6920 err = ieee80211_auth(sdata); 6921 if (err) { 6922 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6923 goto err_clear; 6924 } 6925 6926 /* hold our own reference */ 6927 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6928 return 0; 6929 6930 err_clear: 6931 if (!sdata->vif.valid_links) { 6932 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6933 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6934 BSS_CHANGED_BSSID); 6935 mutex_lock(&sdata->local->mtx); 6936 ieee80211_link_release_channel(&sdata->deflink); 6937 mutex_unlock(&sdata->local->mtx); 6938 } 6939 ifmgd->auth_data = NULL; 6940 kfree(auth_data); 6941 return err; 6942 } 6943 6944 static ieee80211_conn_flags_t 6945 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6946 struct ieee80211_mgd_assoc_data *assoc_data, 6947 struct cfg80211_assoc_request *req, 6948 ieee80211_conn_flags_t conn_flags, 6949 unsigned int link_id) 6950 { 6951 struct ieee80211_local *local = sdata->local; 6952 const struct cfg80211_bss_ies *beacon_ies; 6953 struct ieee80211_supported_band *sband; 6954 const struct element *ht_elem, *vht_elem; 6955 struct ieee80211_link_data *link; 6956 struct cfg80211_bss *cbss; 6957 struct ieee80211_bss *bss; 6958 bool is_5ghz, is_6ghz; 6959 6960 cbss = assoc_data->link[link_id].bss; 6961 if (WARN_ON(!cbss)) 6962 return 0; 6963 6964 bss = (void *)cbss->priv; 6965 6966 sband = local->hw.wiphy->bands[cbss->channel->band]; 6967 if (WARN_ON(!sband)) 6968 return 0; 6969 6970 link = sdata_dereference(sdata->link[link_id], sdata); 6971 if (WARN_ON(!link)) 6972 return 0; 6973 6974 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6975 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6976 6977 /* for MLO connections assume advertising all rates is OK */ 6978 if (!req->ap_mld_addr) { 6979 assoc_data->supp_rates = bss->supp_rates; 6980 assoc_data->supp_rates_len = bss->supp_rates_len; 6981 } 6982 6983 /* copy and link elems for the STA profile */ 6984 if (req->links[link_id].elems_len) { 6985 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6986 req->links[link_id].elems_len); 6987 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6988 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6989 assoc_data->ie_pos += req->links[link_id].elems_len; 6990 } 6991 6992 rcu_read_lock(); 6993 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 6994 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6995 assoc_data->link[link_id].ap_ht_param = 6996 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6997 else if (!is_6ghz) 6998 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6999 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7000 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7001 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7002 sizeof(struct ieee80211_vht_cap)); 7003 } else if (is_5ghz) { 7004 link_info(link, 7005 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7006 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7007 IEEE80211_CONN_DISABLE_HE | 7008 IEEE80211_CONN_DISABLE_EHT; 7009 } 7010 rcu_read_unlock(); 7011 7012 link->u.mgd.beacon_crc_valid = false; 7013 link->u.mgd.dtim_period = 0; 7014 link->u.mgd.have_beacon = false; 7015 7016 /* override HT/VHT configuration only if the AP and we support it */ 7017 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7018 struct ieee80211_sta_ht_cap sta_ht_cap; 7019 7020 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7021 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7022 } 7023 7024 link->conf->eht_puncturing = 0; 7025 7026 rcu_read_lock(); 7027 beacon_ies = rcu_dereference(cbss->beacon_ies); 7028 if (beacon_ies) { 7029 const struct ieee80211_eht_operation *eht_oper; 7030 const struct element *elem; 7031 u8 dtim_count = 0; 7032 7033 ieee80211_get_dtim(beacon_ies, &dtim_count, 7034 &link->u.mgd.dtim_period); 7035 7036 sdata->deflink.u.mgd.have_beacon = true; 7037 7038 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7039 link->conf->sync_tsf = beacon_ies->tsf; 7040 link->conf->sync_device_ts = bss->device_ts_beacon; 7041 link->conf->sync_dtim_count = dtim_count; 7042 } 7043 7044 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7045 beacon_ies->data, beacon_ies->len); 7046 if (elem && elem->datalen >= 3) 7047 link->conf->profile_periodicity = elem->data[2]; 7048 else 7049 link->conf->profile_periodicity = 0; 7050 7051 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7052 beacon_ies->data, beacon_ies->len); 7053 if (elem && elem->datalen >= 11 && 7054 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7055 link->conf->ema_ap = true; 7056 else 7057 link->conf->ema_ap = false; 7058 7059 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7060 beacon_ies->data, beacon_ies->len); 7061 eht_oper = (const void *)(elem->data + 1); 7062 7063 if (elem && 7064 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7065 elem->datalen - 1) && 7066 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7067 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7068 const struct ieee80211_eht_operation_info *info = 7069 (void *)eht_oper->optional; 7070 const u8 *disable_subchannel_bitmap = info->optional; 7071 u16 bitmap; 7072 7073 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7074 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7075 &link->conf->chandef)) 7076 ieee80211_handle_puncturing_bitmap(link, 7077 eht_oper, 7078 bitmap, 7079 NULL); 7080 else 7081 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7082 } 7083 } 7084 rcu_read_unlock(); 7085 7086 if (bss->corrupt_data) { 7087 char *corrupt_type = "data"; 7088 7089 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7090 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7091 corrupt_type = "beacon and probe response"; 7092 else 7093 corrupt_type = "beacon"; 7094 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7095 corrupt_type = "probe response"; 7096 } 7097 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7098 cbss->bssid, corrupt_type); 7099 } 7100 7101 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7102 if (sdata->u.mgd.powersave) 7103 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7104 else 7105 link->smps_mode = IEEE80211_SMPS_OFF; 7106 } else { 7107 link->smps_mode = link->u.mgd.req_smps; 7108 } 7109 7110 return conn_flags; 7111 } 7112 7113 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7114 struct cfg80211_assoc_request *req) 7115 { 7116 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7117 struct ieee80211_local *local = sdata->local; 7118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7119 struct ieee80211_mgd_assoc_data *assoc_data; 7120 const struct element *ssid_elem; 7121 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7122 ieee80211_conn_flags_t conn_flags = 0; 7123 struct ieee80211_link_data *link; 7124 struct cfg80211_bss *cbss; 7125 struct ieee80211_bss *bss; 7126 bool override; 7127 int i, err; 7128 size_t size = sizeof(*assoc_data) + req->ie_len; 7129 7130 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7131 size += req->links[i].elems_len; 7132 7133 /* FIXME: no support for 4-addr MLO yet */ 7134 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7135 return -EOPNOTSUPP; 7136 7137 assoc_data = kzalloc(size, GFP_KERNEL); 7138 if (!assoc_data) 7139 return -ENOMEM; 7140 7141 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7142 7143 rcu_read_lock(); 7144 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7145 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7146 rcu_read_unlock(); 7147 kfree(assoc_data); 7148 return -EINVAL; 7149 } 7150 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7151 assoc_data->ssid_len = ssid_elem->datalen; 7152 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7153 vif_cfg->ssid_len = assoc_data->ssid_len; 7154 rcu_read_unlock(); 7155 7156 if (req->ap_mld_addr) { 7157 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7158 if (!req->links[i].bss) 7159 continue; 7160 link = sdata_dereference(sdata->link[i], sdata); 7161 if (link) 7162 ether_addr_copy(assoc_data->link[i].addr, 7163 link->conf->addr); 7164 else 7165 eth_random_addr(assoc_data->link[i].addr); 7166 } 7167 } else { 7168 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7169 } 7170 7171 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7172 7173 memcpy(assoc_data->ap_addr, 7174 req->ap_mld_addr ?: req->bss->bssid, 7175 ETH_ALEN); 7176 7177 if (ifmgd->associated) { 7178 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7179 7180 sdata_info(sdata, 7181 "disconnect from AP %pM for new assoc to %pM\n", 7182 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7183 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7184 WLAN_REASON_UNSPECIFIED, 7185 false, frame_buf); 7186 7187 ieee80211_report_disconnect(sdata, frame_buf, 7188 sizeof(frame_buf), true, 7189 WLAN_REASON_UNSPECIFIED, 7190 false); 7191 } 7192 7193 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7194 err = -EBUSY; 7195 goto err_free; 7196 } 7197 7198 if (ifmgd->assoc_data) { 7199 err = -EBUSY; 7200 goto err_free; 7201 } 7202 7203 if (ifmgd->auth_data) { 7204 bool match; 7205 7206 /* keep sta info, bssid if matching */ 7207 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7208 assoc_data->ap_addr) && 7209 ifmgd->auth_data->link_id == req->link_id; 7210 ieee80211_destroy_auth_data(sdata, match); 7211 } 7212 7213 /* prepare assoc data */ 7214 7215 bss = (void *)cbss->priv; 7216 assoc_data->wmm = bss->wmm_used && 7217 (local->hw.queues >= IEEE80211_NUM_ACS); 7218 7219 /* 7220 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7221 * We still associate in non-HT mode (11a/b/g) if any one of these 7222 * ciphers is configured as pairwise. 7223 * We can set this to true for non-11n hardware, that'll be checked 7224 * separately along with the peer capabilities. 7225 */ 7226 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7227 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7228 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7229 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7230 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7231 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7232 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7233 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7234 netdev_info(sdata->dev, 7235 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7236 } 7237 } 7238 7239 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7240 if (!bss->wmm_used) { 7241 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7242 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7243 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7244 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7245 netdev_info(sdata->dev, 7246 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7247 } 7248 7249 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7250 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7251 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7252 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7253 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7254 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7255 } 7256 7257 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7258 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7259 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7260 } 7261 7262 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7263 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7264 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7265 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7266 } 7267 7268 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7269 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7270 7271 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7272 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7273 sizeof(ifmgd->ht_capa_mask)); 7274 7275 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7276 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7277 sizeof(ifmgd->vht_capa_mask)); 7278 7279 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7280 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7281 sizeof(ifmgd->s1g_capa_mask)); 7282 7283 if (req->ie && req->ie_len) { 7284 memcpy(assoc_data->ie, req->ie, req->ie_len); 7285 assoc_data->ie_len = req->ie_len; 7286 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7287 } else { 7288 assoc_data->ie_pos = assoc_data->ie; 7289 } 7290 7291 if (req->fils_kek) { 7292 /* should already be checked in cfg80211 - so warn */ 7293 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7294 err = -EINVAL; 7295 goto err_free; 7296 } 7297 memcpy(assoc_data->fils_kek, req->fils_kek, 7298 req->fils_kek_len); 7299 assoc_data->fils_kek_len = req->fils_kek_len; 7300 } 7301 7302 if (req->fils_nonces) 7303 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7304 2 * FILS_NONCE_LEN); 7305 7306 /* default timeout */ 7307 assoc_data->timeout = jiffies; 7308 assoc_data->timeout_started = true; 7309 7310 assoc_data->assoc_link_id = assoc_link_id; 7311 7312 if (req->ap_mld_addr) { 7313 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7314 assoc_data->link[i].conn_flags = conn_flags; 7315 assoc_data->link[i].bss = req->links[i].bss; 7316 } 7317 7318 /* if there was no authentication, set up the link */ 7319 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7320 if (err) 7321 goto err_clear; 7322 } else { 7323 assoc_data->link[0].conn_flags = conn_flags; 7324 assoc_data->link[0].bss = cbss; 7325 } 7326 7327 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7328 if (WARN_ON(!link)) { 7329 err = -EINVAL; 7330 goto err_clear; 7331 } 7332 7333 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7334 conn_flags |= link->u.mgd.conn_flags; 7335 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7336 conn_flags, assoc_link_id); 7337 override = link->u.mgd.conn_flags != conn_flags; 7338 link->u.mgd.conn_flags |= conn_flags; 7339 7340 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7341 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7342 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7343 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7344 7345 if (bss->wmm_used && bss->uapsd_supported && 7346 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7347 assoc_data->uapsd = true; 7348 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7349 } else { 7350 assoc_data->uapsd = false; 7351 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7352 } 7353 7354 if (req->prev_bssid) 7355 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7356 7357 if (req->use_mfp) { 7358 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7359 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7360 } else { 7361 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7362 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7363 } 7364 7365 if (req->flags & ASSOC_REQ_USE_RRM) 7366 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7367 else 7368 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7369 7370 if (req->crypto.control_port) 7371 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7372 else 7373 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7374 7375 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7376 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7377 sdata->control_port_over_nl80211 = 7378 req->crypto.control_port_over_nl80211; 7379 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7380 7381 /* kick off associate process */ 7382 ifmgd->assoc_data = assoc_data; 7383 7384 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7385 if (!assoc_data->link[i].bss) 7386 continue; 7387 if (i == assoc_data->assoc_link_id) 7388 continue; 7389 /* only calculate the flags, hence link == NULL */ 7390 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7391 &assoc_data->link[i].conn_flags); 7392 if (err) 7393 goto err_clear; 7394 } 7395 7396 /* needed for transmitting the assoc frames properly */ 7397 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7398 7399 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7400 req->ap_mld_addr, true, override); 7401 if (err) 7402 goto err_clear; 7403 7404 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7405 link->u.mgd.conn_flags; 7406 7407 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7408 const struct cfg80211_bss_ies *beacon_ies; 7409 7410 rcu_read_lock(); 7411 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7412 7413 if (beacon_ies) { 7414 /* 7415 * Wait up to one beacon interval ... 7416 * should this be more if we miss one? 7417 */ 7418 sdata_info(sdata, "waiting for beacon from %pM\n", 7419 link->u.mgd.bssid); 7420 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7421 assoc_data->timeout_started = true; 7422 assoc_data->need_beacon = true; 7423 } 7424 rcu_read_unlock(); 7425 } 7426 7427 run_again(sdata, assoc_data->timeout); 7428 7429 return 0; 7430 err_clear: 7431 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7432 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7433 BSS_CHANGED_BSSID); 7434 ifmgd->assoc_data = NULL; 7435 err_free: 7436 kfree(assoc_data); 7437 return err; 7438 } 7439 7440 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7441 struct cfg80211_deauth_request *req) 7442 { 7443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7444 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7445 bool tx = !req->local_state_change; 7446 struct ieee80211_prep_tx_info info = { 7447 .subtype = IEEE80211_STYPE_DEAUTH, 7448 }; 7449 7450 if (ifmgd->auth_data && 7451 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7452 sdata_info(sdata, 7453 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7454 req->bssid, req->reason_code, 7455 ieee80211_get_reason_code_string(req->reason_code)); 7456 7457 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7458 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7459 IEEE80211_STYPE_DEAUTH, 7460 req->reason_code, tx, 7461 frame_buf); 7462 ieee80211_destroy_auth_data(sdata, false); 7463 ieee80211_report_disconnect(sdata, frame_buf, 7464 sizeof(frame_buf), true, 7465 req->reason_code, false); 7466 drv_mgd_complete_tx(sdata->local, sdata, &info); 7467 return 0; 7468 } 7469 7470 if (ifmgd->assoc_data && 7471 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7472 sdata_info(sdata, 7473 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7474 req->bssid, req->reason_code, 7475 ieee80211_get_reason_code_string(req->reason_code)); 7476 7477 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7478 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7479 IEEE80211_STYPE_DEAUTH, 7480 req->reason_code, tx, 7481 frame_buf); 7482 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7483 ieee80211_report_disconnect(sdata, frame_buf, 7484 sizeof(frame_buf), true, 7485 req->reason_code, false); 7486 return 0; 7487 } 7488 7489 if (ifmgd->associated && 7490 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7491 sdata_info(sdata, 7492 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7493 req->bssid, req->reason_code, 7494 ieee80211_get_reason_code_string(req->reason_code)); 7495 7496 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7497 req->reason_code, tx, frame_buf); 7498 ieee80211_report_disconnect(sdata, frame_buf, 7499 sizeof(frame_buf), true, 7500 req->reason_code, false); 7501 drv_mgd_complete_tx(sdata->local, sdata, &info); 7502 return 0; 7503 } 7504 7505 return -ENOTCONN; 7506 } 7507 7508 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7509 struct cfg80211_disassoc_request *req) 7510 { 7511 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7512 7513 if (!sdata->u.mgd.associated || 7514 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7515 return -ENOTCONN; 7516 7517 sdata_info(sdata, 7518 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7519 req->ap_addr, req->reason_code, 7520 ieee80211_get_reason_code_string(req->reason_code)); 7521 7522 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7523 req->reason_code, !req->local_state_change, 7524 frame_buf); 7525 7526 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7527 req->reason_code, false); 7528 7529 return 0; 7530 } 7531 7532 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7533 { 7534 cancel_work_sync(&link->u.mgd.request_smps_work); 7535 cancel_work_sync(&link->u.mgd.chswitch_work); 7536 } 7537 7538 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7539 { 7540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7541 7542 /* 7543 * Make sure some work items will not run after this, 7544 * they will not do anything but might not have been 7545 * cancelled when disconnecting. 7546 */ 7547 cancel_work_sync(&ifmgd->monitor_work); 7548 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7549 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7550 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7551 7552 sdata_lock(sdata); 7553 if (ifmgd->assoc_data) 7554 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7555 if (ifmgd->auth_data) 7556 ieee80211_destroy_auth_data(sdata, false); 7557 spin_lock_bh(&ifmgd->teardown_lock); 7558 if (ifmgd->teardown_skb) { 7559 kfree_skb(ifmgd->teardown_skb); 7560 ifmgd->teardown_skb = NULL; 7561 ifmgd->orig_teardown_skb = NULL; 7562 } 7563 kfree(ifmgd->assoc_req_ies); 7564 ifmgd->assoc_req_ies = NULL; 7565 ifmgd->assoc_req_ies_len = 0; 7566 spin_unlock_bh(&ifmgd->teardown_lock); 7567 del_timer_sync(&ifmgd->timer); 7568 sdata_unlock(sdata); 7569 } 7570 7571 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7572 enum nl80211_cqm_rssi_threshold_event rssi_event, 7573 s32 rssi_level, 7574 gfp_t gfp) 7575 { 7576 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7577 7578 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7579 7580 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7581 } 7582 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7583 7584 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7585 { 7586 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7587 7588 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7589 7590 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7591 } 7592 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7593 7594 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7595 int rssi_min_thold, 7596 int rssi_max_thold) 7597 { 7598 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7599 7600 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7601 return; 7602 7603 /* 7604 * Scale up threshold values before storing it, as the RSSI averaging 7605 * algorithm uses a scaled up value as well. Change this scaling 7606 * factor if the RSSI averaging algorithm changes. 7607 */ 7608 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7609 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7610 } 7611 7612 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7613 int rssi_min_thold, 7614 int rssi_max_thold) 7615 { 7616 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7617 7618 WARN_ON(rssi_min_thold == rssi_max_thold || 7619 rssi_min_thold > rssi_max_thold); 7620 7621 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7622 rssi_max_thold); 7623 } 7624 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7625 7626 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7627 { 7628 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7629 7630 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7631 } 7632 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7633