1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2023 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * Extract from the given disabled subchannel bitmap (raw format 93 * from the EHT Operation Element) the bits for the subchannel 94 * we're using right now. 95 */ 96 static u16 97 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 98 struct cfg80211_chan_def *chandef, u16 bitmap) 99 { 100 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 101 struct cfg80211_chan_def ap_chandef = *chandef; 102 u32 ap_center_freq, local_center_freq; 103 u32 ap_bw, local_bw; 104 int ap_start_freq, local_start_freq; 105 u16 shift, mask; 106 107 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 108 !(eht_oper->params & 109 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 110 return 0; 111 112 /* set 160/320 supported to get the full AP definition */ 113 ieee80211_chandef_eht_oper(eht_oper, true, true, &ap_chandef); 114 ap_center_freq = ap_chandef.center_freq1; 115 ap_bw = 20 * BIT(u8_get_bits(info->control, 116 IEEE80211_EHT_OPER_CHAN_WIDTH)); 117 ap_start_freq = ap_center_freq - ap_bw / 2; 118 local_center_freq = chandef->center_freq1; 119 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 120 local_start_freq = local_center_freq - local_bw / 2; 121 shift = (local_start_freq - ap_start_freq) / 20; 122 mask = BIT(local_bw / 20) - 1; 123 124 return (bitmap >> shift) & mask; 125 } 126 127 /* 128 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 129 * valid bitmap. 130 */ 131 static void 132 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 133 const struct ieee80211_eht_operation *eht_oper, 134 u16 bitmap, u64 *changed) 135 { 136 struct cfg80211_chan_def *chandef = &link->conf->chandef; 137 u16 extracted; 138 u64 _changed = 0; 139 140 if (!changed) 141 changed = &_changed; 142 143 while (chandef->width > NL80211_CHAN_WIDTH_40) { 144 extracted = 145 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 146 bitmap); 147 148 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 149 chandef)) 150 break; 151 link->u.mgd.conn_flags |= 152 ieee80211_chandef_downgrade(chandef); 153 *changed |= BSS_CHANGED_BANDWIDTH; 154 } 155 156 if (chandef->width <= NL80211_CHAN_WIDTH_40) 157 extracted = 0; 158 159 if (link->conf->eht_puncturing != extracted) { 160 link->conf->eht_puncturing = extracted; 161 *changed |= BSS_CHANGED_EHT_PUNCTURING; 162 } 163 } 164 165 /* 166 * We can have multiple work items (and connection probing) 167 * scheduling this timer, but we need to take care to only 168 * reschedule it when it should fire _earlier_ than it was 169 * asked for before, or if it's not pending right now. This 170 * function ensures that. Note that it then is required to 171 * run this function for all timeouts after the first one 172 * has happened -- the work that runs from this timer will 173 * do that. 174 */ 175 static void run_again(struct ieee80211_sub_if_data *sdata, 176 unsigned long timeout) 177 { 178 sdata_assert_lock(sdata); 179 180 if (!timer_pending(&sdata->u.mgd.timer) || 181 time_before(timeout, sdata->u.mgd.timer.expires)) 182 mod_timer(&sdata->u.mgd.timer, timeout); 183 } 184 185 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 186 { 187 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 188 return; 189 190 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 191 return; 192 193 mod_timer(&sdata->u.mgd.bcn_mon_timer, 194 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 195 } 196 197 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 198 { 199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 200 201 if (unlikely(!ifmgd->associated)) 202 return; 203 204 if (ifmgd->probe_send_count) 205 ifmgd->probe_send_count = 0; 206 207 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 208 return; 209 210 mod_timer(&ifmgd->conn_mon_timer, 211 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 212 } 213 214 static int ecw2cw(int ecw) 215 { 216 return (1 << ecw) - 1; 217 } 218 219 static ieee80211_conn_flags_t 220 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 221 struct ieee80211_link_data *link, 222 ieee80211_conn_flags_t conn_flags, 223 struct ieee80211_supported_band *sband, 224 struct ieee80211_channel *channel, 225 u32 vht_cap_info, 226 const struct ieee80211_ht_operation *ht_oper, 227 const struct ieee80211_vht_operation *vht_oper, 228 const struct ieee80211_he_operation *he_oper, 229 const struct ieee80211_eht_operation *eht_oper, 230 const struct ieee80211_s1g_oper_ie *s1g_oper, 231 struct cfg80211_chan_def *chandef, bool tracking) 232 { 233 struct cfg80211_chan_def vht_chandef; 234 struct ieee80211_sta_ht_cap sta_ht_cap; 235 ieee80211_conn_flags_t ret; 236 u32 ht_cfreq; 237 238 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 239 chandef->chan = channel; 240 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 241 chandef->center_freq1 = channel->center_freq; 242 chandef->freq1_offset = channel->freq_offset; 243 244 if (channel->band == NL80211_BAND_6GHZ) { 245 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 246 chandef)) { 247 mlme_dbg(sdata, 248 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 249 ret = IEEE80211_CONN_DISABLE_HT | 250 IEEE80211_CONN_DISABLE_VHT | 251 IEEE80211_CONN_DISABLE_HE | 252 IEEE80211_CONN_DISABLE_EHT; 253 } else { 254 ret = 0; 255 } 256 vht_chandef = *chandef; 257 goto out; 258 } else if (sband->band == NL80211_BAND_S1GHZ) { 259 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 260 sdata_info(sdata, 261 "Missing S1G Operation Element? Trying operating == primary\n"); 262 chandef->width = ieee80211_s1g_channel_width(channel); 263 } 264 265 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 266 IEEE80211_CONN_DISABLE_VHT | 267 IEEE80211_CONN_DISABLE_80P80MHZ | 268 IEEE80211_CONN_DISABLE_160MHZ; 269 goto out; 270 } 271 272 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 273 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 274 275 if (!ht_oper || !sta_ht_cap.ht_supported) { 276 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 277 ret = IEEE80211_CONN_DISABLE_HT | 278 IEEE80211_CONN_DISABLE_VHT | 279 IEEE80211_CONN_DISABLE_HE | 280 IEEE80211_CONN_DISABLE_EHT; 281 goto out; 282 } 283 284 chandef->width = NL80211_CHAN_WIDTH_20; 285 286 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 287 channel->band); 288 /* check that channel matches the right operating channel */ 289 if (!tracking && channel->center_freq != ht_cfreq) { 290 /* 291 * It's possible that some APs are confused here; 292 * Netgear WNDR3700 sometimes reports 4 higher than 293 * the actual channel in association responses, but 294 * since we look at probe response/beacon data here 295 * it should be OK. 296 */ 297 sdata_info(sdata, 298 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 299 channel->center_freq, ht_cfreq, 300 ht_oper->primary_chan, channel->band); 301 ret = IEEE80211_CONN_DISABLE_HT | 302 IEEE80211_CONN_DISABLE_VHT | 303 IEEE80211_CONN_DISABLE_HE | 304 IEEE80211_CONN_DISABLE_EHT; 305 goto out; 306 } 307 308 /* check 40 MHz support, if we have it */ 309 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 310 ieee80211_chandef_ht_oper(ht_oper, chandef); 311 } else { 312 mlme_dbg(sdata, "40 MHz not supported\n"); 313 /* 40 MHz (and 80 MHz) must be supported for VHT */ 314 ret = IEEE80211_CONN_DISABLE_VHT; 315 /* also mark 40 MHz disabled */ 316 ret |= IEEE80211_CONN_DISABLE_40MHZ; 317 goto out; 318 } 319 320 if (!vht_oper || !sband->vht_cap.vht_supported) { 321 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 322 ret = IEEE80211_CONN_DISABLE_VHT; 323 goto out; 324 } 325 326 vht_chandef = *chandef; 327 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 328 he_oper && 329 (le32_to_cpu(he_oper->he_oper_params) & 330 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 331 struct ieee80211_vht_operation he_oper_vht_cap; 332 333 /* 334 * Set only first 3 bytes (other 2 aren't used in 335 * ieee80211_chandef_vht_oper() anyway) 336 */ 337 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 338 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 339 340 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 341 &he_oper_vht_cap, ht_oper, 342 &vht_chandef)) { 343 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 344 sdata_info(sdata, 345 "HE AP VHT information is invalid, disabling HE\n"); 346 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 347 goto out; 348 } 349 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 350 vht_cap_info, 351 vht_oper, ht_oper, 352 &vht_chandef)) { 353 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 354 sdata_info(sdata, 355 "AP VHT information is invalid, disabling VHT\n"); 356 ret = IEEE80211_CONN_DISABLE_VHT; 357 goto out; 358 } 359 360 if (!cfg80211_chandef_valid(&vht_chandef)) { 361 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 362 sdata_info(sdata, 363 "AP VHT information is invalid, disabling VHT\n"); 364 ret = IEEE80211_CONN_DISABLE_VHT; 365 goto out; 366 } 367 368 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 369 ret = 0; 370 goto out; 371 } 372 373 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 374 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 375 sdata_info(sdata, 376 "AP VHT information doesn't match HT, disabling VHT\n"); 377 ret = IEEE80211_CONN_DISABLE_VHT; 378 goto out; 379 } 380 381 *chandef = vht_chandef; 382 383 /* 384 * handle the case that the EHT operation indicates that it holds EHT 385 * operation information (in case that the channel width differs from 386 * the channel width reported in HT/VHT/HE). 387 */ 388 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 389 struct cfg80211_chan_def eht_chandef = *chandef; 390 391 ieee80211_chandef_eht_oper(eht_oper, 392 eht_chandef.width == 393 NL80211_CHAN_WIDTH_160, 394 false, &eht_chandef); 395 396 if (!cfg80211_chandef_valid(&eht_chandef)) { 397 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 398 sdata_info(sdata, 399 "AP EHT information is invalid, disabling EHT\n"); 400 ret = IEEE80211_CONN_DISABLE_EHT; 401 goto out; 402 } 403 404 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 405 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 406 sdata_info(sdata, 407 "AP EHT information is incompatible, disabling EHT\n"); 408 ret = IEEE80211_CONN_DISABLE_EHT; 409 goto out; 410 } 411 412 *chandef = eht_chandef; 413 } 414 415 ret = 0; 416 417 out: 418 /* 419 * When tracking the current AP, don't do any further checks if the 420 * new chandef is identical to the one we're currently using for the 421 * connection. This keeps us from playing ping-pong with regulatory, 422 * without it the following can happen (for example): 423 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 424 * - AP advertises regdom US 425 * - CRDA loads regdom US with 80 MHz prohibited (old database) 426 * - the code below detects an unsupported channel, downgrades, and 427 * we disconnect from the AP in the caller 428 * - disconnect causes CRDA to reload world regdomain and the game 429 * starts anew. 430 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 431 * 432 * It seems possible that there are still scenarios with CSA or real 433 * bandwidth changes where a this could happen, but those cases are 434 * less common and wouldn't completely prevent using the AP. 435 */ 436 if (tracking && 437 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 438 return ret; 439 440 /* don't print the message below for VHT mismatch if VHT is disabled */ 441 if (ret & IEEE80211_CONN_DISABLE_VHT) 442 vht_chandef = *chandef; 443 444 /* 445 * Ignore the DISABLED flag when we're already connected and only 446 * tracking the APs beacon for bandwidth changes - otherwise we 447 * might get disconnected here if we connect to an AP, update our 448 * regulatory information based on the AP's country IE and the 449 * information we have is wrong/outdated and disables the channel 450 * that we're actually using for the connection to the AP. 451 */ 452 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 453 tracking ? 0 : 454 IEEE80211_CHAN_DISABLED)) { 455 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 456 ret = IEEE80211_CONN_DISABLE_HT | 457 IEEE80211_CONN_DISABLE_VHT | 458 IEEE80211_CONN_DISABLE_HE | 459 IEEE80211_CONN_DISABLE_EHT; 460 break; 461 } 462 463 ret |= ieee80211_chandef_downgrade(chandef); 464 } 465 466 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 467 IEEE80211_CHAN_NO_HE)) 468 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 469 470 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 471 IEEE80211_CHAN_NO_EHT)) 472 ret |= IEEE80211_CONN_DISABLE_EHT; 473 474 if (chandef->width != vht_chandef.width && !tracking) 475 sdata_info(sdata, 476 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 477 478 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 479 return ret; 480 } 481 482 static int ieee80211_config_bw(struct ieee80211_link_data *link, 483 const struct ieee80211_ht_cap *ht_cap, 484 const struct ieee80211_vht_cap *vht_cap, 485 const struct ieee80211_ht_operation *ht_oper, 486 const struct ieee80211_vht_operation *vht_oper, 487 const struct ieee80211_he_operation *he_oper, 488 const struct ieee80211_eht_operation *eht_oper, 489 const struct ieee80211_s1g_oper_ie *s1g_oper, 490 const u8 *bssid, u64 *changed) 491 { 492 struct ieee80211_sub_if_data *sdata = link->sdata; 493 struct ieee80211_local *local = sdata->local; 494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 495 struct ieee80211_channel *chan = link->conf->chandef.chan; 496 struct ieee80211_supported_band *sband = 497 local->hw.wiphy->bands[chan->band]; 498 struct cfg80211_chan_def chandef; 499 u16 ht_opmode; 500 ieee80211_conn_flags_t flags; 501 u32 vht_cap_info = 0; 502 int ret; 503 504 /* if HT was/is disabled, don't track any bandwidth changes */ 505 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 506 return 0; 507 508 /* don't check VHT if we associated as non-VHT station */ 509 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 510 vht_oper = NULL; 511 512 /* don't check HE if we associated as non-HE station */ 513 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 514 !ieee80211_get_he_iftype_cap(sband, 515 ieee80211_vif_type_p2p(&sdata->vif))) { 516 he_oper = NULL; 517 eht_oper = NULL; 518 } 519 520 /* don't check EHT if we associated as non-EHT station */ 521 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 522 !ieee80211_get_eht_iftype_cap(sband, 523 ieee80211_vif_type_p2p(&sdata->vif))) 524 eht_oper = NULL; 525 526 /* 527 * if bss configuration changed store the new one - 528 * this may be applicable even if channel is identical 529 */ 530 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 531 if (link->conf->ht_operation_mode != ht_opmode) { 532 *changed |= BSS_CHANGED_HT; 533 link->conf->ht_operation_mode = ht_opmode; 534 } 535 536 if (vht_cap) 537 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 538 539 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 540 flags = ieee80211_determine_chantype(sdata, link, 541 link->u.mgd.conn_flags, 542 sband, chan, vht_cap_info, 543 ht_oper, vht_oper, 544 he_oper, eht_oper, 545 s1g_oper, &chandef, true); 546 547 /* 548 * Downgrade the new channel if we associated with restricted 549 * capabilities. For example, if we associated as a 20 MHz STA 550 * to a 40 MHz AP (due to regulatory, capabilities or config 551 * reasons) then switching to a 40 MHz channel now won't do us 552 * any good -- we couldn't use it with the AP. 553 */ 554 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 555 chandef.width == NL80211_CHAN_WIDTH_80P80) 556 flags |= ieee80211_chandef_downgrade(&chandef); 557 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 558 chandef.width == NL80211_CHAN_WIDTH_160) 559 flags |= ieee80211_chandef_downgrade(&chandef); 560 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 561 chandef.width > NL80211_CHAN_WIDTH_20) 562 flags |= ieee80211_chandef_downgrade(&chandef); 563 564 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 565 return 0; 566 567 link_info(link, 568 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 569 link->u.mgd.bssid, chandef.chan->center_freq, 570 chandef.chan->freq_offset, chandef.width, 571 chandef.center_freq1, chandef.freq1_offset, 572 chandef.center_freq2); 573 574 if (flags != (link->u.mgd.conn_flags & 575 (IEEE80211_CONN_DISABLE_HT | 576 IEEE80211_CONN_DISABLE_VHT | 577 IEEE80211_CONN_DISABLE_HE | 578 IEEE80211_CONN_DISABLE_EHT | 579 IEEE80211_CONN_DISABLE_40MHZ | 580 IEEE80211_CONN_DISABLE_80P80MHZ | 581 IEEE80211_CONN_DISABLE_160MHZ | 582 IEEE80211_CONN_DISABLE_320MHZ)) || 583 !cfg80211_chandef_valid(&chandef)) { 584 sdata_info(sdata, 585 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 586 link->u.mgd.bssid, flags, ifmgd->flags); 587 return -EINVAL; 588 } 589 590 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 591 592 if (ret) { 593 sdata_info(sdata, 594 "AP %pM changed bandwidth to incompatible one - disconnect\n", 595 link->u.mgd.bssid); 596 return ret; 597 } 598 599 return 0; 600 } 601 602 /* frame sending functions */ 603 604 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 605 struct sk_buff *skb, u8 ap_ht_param, 606 struct ieee80211_supported_band *sband, 607 struct ieee80211_channel *channel, 608 enum ieee80211_smps_mode smps, 609 ieee80211_conn_flags_t conn_flags) 610 { 611 u8 *pos; 612 u32 flags = channel->flags; 613 u16 cap; 614 struct ieee80211_sta_ht_cap ht_cap; 615 616 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 617 618 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 619 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 620 621 /* determine capability flags */ 622 cap = ht_cap.cap; 623 624 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 625 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 626 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 627 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 628 cap &= ~IEEE80211_HT_CAP_SGI_40; 629 } 630 break; 631 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 632 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 633 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 634 cap &= ~IEEE80211_HT_CAP_SGI_40; 635 } 636 break; 637 } 638 639 /* 640 * If 40 MHz was disabled associate as though we weren't 641 * capable of 40 MHz -- some broken APs will never fall 642 * back to trying to transmit in 20 MHz. 643 */ 644 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 645 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 646 cap &= ~IEEE80211_HT_CAP_SGI_40; 647 } 648 649 /* set SM PS mode properly */ 650 cap &= ~IEEE80211_HT_CAP_SM_PS; 651 switch (smps) { 652 case IEEE80211_SMPS_AUTOMATIC: 653 case IEEE80211_SMPS_NUM_MODES: 654 WARN_ON(1); 655 fallthrough; 656 case IEEE80211_SMPS_OFF: 657 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 658 IEEE80211_HT_CAP_SM_PS_SHIFT; 659 break; 660 case IEEE80211_SMPS_STATIC: 661 cap |= WLAN_HT_CAP_SM_PS_STATIC << 662 IEEE80211_HT_CAP_SM_PS_SHIFT; 663 break; 664 case IEEE80211_SMPS_DYNAMIC: 665 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 666 IEEE80211_HT_CAP_SM_PS_SHIFT; 667 break; 668 } 669 670 /* reserve and fill IE */ 671 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 672 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 673 } 674 675 /* This function determines vht capability flags for the association 676 * and builds the IE. 677 * Note - the function returns true to own the MU-MIMO capability 678 */ 679 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 680 struct sk_buff *skb, 681 struct ieee80211_supported_band *sband, 682 struct ieee80211_vht_cap *ap_vht_cap, 683 ieee80211_conn_flags_t conn_flags) 684 { 685 struct ieee80211_local *local = sdata->local; 686 u8 *pos; 687 u32 cap; 688 struct ieee80211_sta_vht_cap vht_cap; 689 u32 mask, ap_bf_sts, our_bf_sts; 690 bool mu_mimo_owner = false; 691 692 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 693 694 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 695 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 696 697 /* determine capability flags */ 698 cap = vht_cap.cap; 699 700 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 701 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 702 703 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 704 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 705 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 706 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 707 } 708 709 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 710 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 711 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 712 } 713 714 /* 715 * Some APs apparently get confused if our capabilities are better 716 * than theirs, so restrict what we advertise in the assoc request. 717 */ 718 if (!(ap_vht_cap->vht_cap_info & 719 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 720 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 721 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 722 else if (!(ap_vht_cap->vht_cap_info & 723 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 724 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 725 726 /* 727 * If some other vif is using the MU-MIMO capability we cannot associate 728 * using MU-MIMO - this will lead to contradictions in the group-id 729 * mechanism. 730 * Ownership is defined since association request, in order to avoid 731 * simultaneous associations with MU-MIMO. 732 */ 733 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 734 bool disable_mu_mimo = false; 735 struct ieee80211_sub_if_data *other; 736 737 list_for_each_entry_rcu(other, &local->interfaces, list) { 738 if (other->vif.bss_conf.mu_mimo_owner) { 739 disable_mu_mimo = true; 740 break; 741 } 742 } 743 if (disable_mu_mimo) 744 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 745 else 746 mu_mimo_owner = true; 747 } 748 749 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 750 751 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 752 our_bf_sts = cap & mask; 753 754 if (ap_bf_sts < our_bf_sts) { 755 cap &= ~mask; 756 cap |= ap_bf_sts; 757 } 758 759 /* reserve and fill IE */ 760 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 761 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 762 763 return mu_mimo_owner; 764 } 765 766 /* This function determines HE capability flags for the association 767 * and builds the IE. 768 */ 769 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 770 struct sk_buff *skb, 771 struct ieee80211_supported_band *sband, 772 enum ieee80211_smps_mode smps_mode, 773 ieee80211_conn_flags_t conn_flags) 774 { 775 u8 *pos, *pre_he_pos; 776 const struct ieee80211_sta_he_cap *he_cap; 777 u8 he_cap_size; 778 779 he_cap = ieee80211_get_he_iftype_cap(sband, 780 ieee80211_vif_type_p2p(&sdata->vif)); 781 if (WARN_ON(!he_cap)) 782 return; 783 784 /* get a max size estimate */ 785 he_cap_size = 786 2 + 1 + sizeof(he_cap->he_cap_elem) + 787 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 788 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 789 he_cap->he_cap_elem.phy_cap_info); 790 pos = skb_put(skb, he_cap_size); 791 pre_he_pos = pos; 792 pos = ieee80211_ie_build_he_cap(conn_flags, 793 pos, he_cap, pos + he_cap_size); 794 /* trim excess if any */ 795 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 796 797 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 798 } 799 800 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 801 struct sk_buff *skb, 802 struct ieee80211_supported_band *sband) 803 { 804 u8 *pos; 805 const struct ieee80211_sta_he_cap *he_cap; 806 const struct ieee80211_sta_eht_cap *eht_cap; 807 u8 eht_cap_size; 808 809 he_cap = ieee80211_get_he_iftype_cap(sband, 810 ieee80211_vif_type_p2p(&sdata->vif)); 811 eht_cap = ieee80211_get_eht_iftype_cap(sband, 812 ieee80211_vif_type_p2p(&sdata->vif)); 813 814 /* 815 * EHT capabilities element is only added if the HE capabilities element 816 * was added so assume that 'he_cap' is valid and don't check it. 817 */ 818 if (WARN_ON(!he_cap || !eht_cap)) 819 return; 820 821 eht_cap_size = 822 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 823 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 824 &eht_cap->eht_cap_elem, 825 false) + 826 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 827 eht_cap->eht_cap_elem.phy_cap_info); 828 pos = skb_put(skb, eht_cap_size); 829 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 830 false); 831 } 832 833 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 834 enum nl80211_chan_width width, 835 struct ieee80211_supported_band *sband, 836 struct ieee80211_mgd_assoc_data *assoc_data) 837 { 838 unsigned int shift = ieee80211_chanwidth_get_shift(width); 839 unsigned int rates_len, supp_rates_len; 840 u32 rates = 0; 841 int i, count; 842 u8 *pos; 843 844 if (assoc_data->supp_rates_len) { 845 /* 846 * Get all rates supported by the device and the AP as 847 * some APs don't like getting a superset of their rates 848 * in the association request (e.g. D-Link DAP 1353 in 849 * b-only mode)... 850 */ 851 rates_len = ieee80211_parse_bitrates(width, sband, 852 assoc_data->supp_rates, 853 assoc_data->supp_rates_len, 854 &rates); 855 } else { 856 /* 857 * In case AP not provide any supported rates information 858 * before association, we send information element(s) with 859 * all rates that we support. 860 */ 861 rates_len = sband->n_bitrates; 862 for (i = 0; i < sband->n_bitrates; i++) 863 rates |= BIT(i); 864 } 865 866 supp_rates_len = rates_len; 867 if (supp_rates_len > 8) 868 supp_rates_len = 8; 869 870 pos = skb_put(skb, supp_rates_len + 2); 871 *pos++ = WLAN_EID_SUPP_RATES; 872 *pos++ = supp_rates_len; 873 874 count = 0; 875 for (i = 0; i < sband->n_bitrates; i++) { 876 if (BIT(i) & rates) { 877 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 878 5 * (1 << shift)); 879 *pos++ = (u8)rate; 880 if (++count == 8) 881 break; 882 } 883 } 884 885 if (rates_len > count) { 886 pos = skb_put(skb, rates_len - count + 2); 887 *pos++ = WLAN_EID_EXT_SUPP_RATES; 888 *pos++ = rates_len - count; 889 890 for (i++; i < sband->n_bitrates; i++) { 891 if (BIT(i) & rates) { 892 int rate; 893 894 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 895 5 * (1 << shift)); 896 *pos++ = (u8)rate; 897 } 898 } 899 } 900 } 901 902 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 903 const u8 *elems, 904 size_t elems_len, 905 size_t offset) 906 { 907 size_t noffset; 908 909 static const u8 before_ht[] = { 910 WLAN_EID_SSID, 911 WLAN_EID_SUPP_RATES, 912 WLAN_EID_EXT_SUPP_RATES, 913 WLAN_EID_PWR_CAPABILITY, 914 WLAN_EID_SUPPORTED_CHANNELS, 915 WLAN_EID_RSN, 916 WLAN_EID_QOS_CAPA, 917 WLAN_EID_RRM_ENABLED_CAPABILITIES, 918 WLAN_EID_MOBILITY_DOMAIN, 919 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 920 WLAN_EID_RIC_DATA, /* reassoc only */ 921 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 922 }; 923 static const u8 after_ric[] = { 924 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 925 WLAN_EID_HT_CAPABILITY, 926 WLAN_EID_BSS_COEX_2040, 927 /* luckily this is almost always there */ 928 WLAN_EID_EXT_CAPABILITY, 929 WLAN_EID_QOS_TRAFFIC_CAPA, 930 WLAN_EID_TIM_BCAST_REQ, 931 WLAN_EID_INTERWORKING, 932 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 933 WLAN_EID_VHT_CAPABILITY, 934 WLAN_EID_OPMODE_NOTIF, 935 }; 936 937 if (!elems_len) 938 return offset; 939 940 noffset = ieee80211_ie_split_ric(elems, elems_len, 941 before_ht, 942 ARRAY_SIZE(before_ht), 943 after_ric, 944 ARRAY_SIZE(after_ric), 945 offset); 946 skb_put_data(skb, elems + offset, noffset - offset); 947 948 return noffset; 949 } 950 951 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 952 const u8 *elems, 953 size_t elems_len, 954 size_t offset) 955 { 956 static const u8 before_vht[] = { 957 /* 958 * no need to list the ones split off before HT 959 * or generated here 960 */ 961 WLAN_EID_BSS_COEX_2040, 962 WLAN_EID_EXT_CAPABILITY, 963 WLAN_EID_QOS_TRAFFIC_CAPA, 964 WLAN_EID_TIM_BCAST_REQ, 965 WLAN_EID_INTERWORKING, 966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 967 }; 968 size_t noffset; 969 970 if (!elems_len) 971 return offset; 972 973 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 974 noffset = ieee80211_ie_split(elems, elems_len, 975 before_vht, ARRAY_SIZE(before_vht), 976 offset); 977 skb_put_data(skb, elems + offset, noffset - offset); 978 979 return noffset; 980 } 981 982 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 983 const u8 *elems, 984 size_t elems_len, 985 size_t offset) 986 { 987 static const u8 before_he[] = { 988 /* 989 * no need to list the ones split off before VHT 990 * or generated here 991 */ 992 WLAN_EID_OPMODE_NOTIF, 993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 994 /* 11ai elements */ 995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 996 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1000 /* TODO: add 11ah/11aj/11ak elements */ 1001 }; 1002 size_t noffset; 1003 1004 if (!elems_len) 1005 return offset; 1006 1007 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1008 noffset = ieee80211_ie_split(elems, elems_len, 1009 before_he, ARRAY_SIZE(before_he), 1010 offset); 1011 skb_put_data(skb, elems + offset, noffset - offset); 1012 1013 return noffset; 1014 } 1015 1016 #define PRESENT_ELEMS_MAX 8 1017 #define PRESENT_ELEM_EXT_OFFS 0x100 1018 1019 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1020 struct sk_buff *skb, u16 capab, 1021 const struct element *ext_capa, 1022 const u16 *present_elems); 1023 1024 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1025 struct sk_buff *skb, u16 *capab, 1026 const struct element *ext_capa, 1027 const u8 *extra_elems, 1028 size_t extra_elems_len, 1029 unsigned int link_id, 1030 struct ieee80211_link_data *link, 1031 u16 *present_elems) 1032 { 1033 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1035 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1036 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1037 struct ieee80211_channel *chan = cbss->channel; 1038 const struct ieee80211_sband_iftype_data *iftd; 1039 struct ieee80211_local *local = sdata->local; 1040 struct ieee80211_supported_band *sband; 1041 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1042 struct ieee80211_chanctx_conf *chanctx_conf; 1043 enum ieee80211_smps_mode smps_mode; 1044 u16 orig_capab = *capab; 1045 size_t offset = 0; 1046 int present_elems_len = 0; 1047 u8 *pos; 1048 int i; 1049 1050 #define ADD_PRESENT_ELEM(id) do { \ 1051 /* need a last for termination - we use 0 == SSID */ \ 1052 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1053 present_elems[present_elems_len++] = (id); \ 1054 } while (0) 1055 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1056 1057 if (link) 1058 smps_mode = link->smps_mode; 1059 else if (sdata->u.mgd.powersave) 1060 smps_mode = IEEE80211_SMPS_DYNAMIC; 1061 else 1062 smps_mode = IEEE80211_SMPS_OFF; 1063 1064 if (link) { 1065 /* 1066 * 5/10 MHz scenarios are only viable without MLO, in which 1067 * case this pointer should be used ... All of this is a bit 1068 * unclear though, not sure this even works at all. 1069 */ 1070 rcu_read_lock(); 1071 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1072 if (chanctx_conf) 1073 width = chanctx_conf->def.width; 1074 rcu_read_unlock(); 1075 } 1076 1077 sband = local->hw.wiphy->bands[chan->band]; 1078 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1079 1080 if (sband->band == NL80211_BAND_2GHZ) { 1081 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1082 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1083 } 1084 1085 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1086 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1087 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1088 1089 if (sband->band != NL80211_BAND_S1GHZ) 1090 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1091 1092 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1093 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1094 struct cfg80211_chan_def chandef = { 1095 .width = width, 1096 .chan = chan, 1097 }; 1098 1099 pos = skb_put(skb, 4); 1100 *pos++ = WLAN_EID_PWR_CAPABILITY; 1101 *pos++ = 2; 1102 *pos++ = 0; /* min tx power */ 1103 /* max tx power */ 1104 *pos++ = ieee80211_chandef_max_power(&chandef); 1105 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1106 } 1107 1108 /* 1109 * Per spec, we shouldn't include the list of channels if we advertise 1110 * support for extended channel switching, but we've always done that; 1111 * (for now?) apply this restriction only on the (new) 6 GHz band. 1112 */ 1113 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1114 (sband->band != NL80211_BAND_6GHZ || 1115 !ext_capa || ext_capa->datalen < 1 || 1116 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1117 /* TODO: get this in reg domain format */ 1118 pos = skb_put(skb, 2 * sband->n_channels + 2); 1119 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1120 *pos++ = 2 * sband->n_channels; 1121 for (i = 0; i < sband->n_channels; i++) { 1122 int cf = sband->channels[i].center_freq; 1123 1124 *pos++ = ieee80211_frequency_to_channel(cf); 1125 *pos++ = 1; /* one channel in the subband*/ 1126 } 1127 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1128 } 1129 1130 /* if present, add any custom IEs that go before HT */ 1131 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1132 extra_elems_len, 1133 offset); 1134 1135 if (sband->band != NL80211_BAND_6GHZ && 1136 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1137 ieee80211_add_ht_ie(sdata, skb, 1138 assoc_data->link[link_id].ap_ht_param, 1139 sband, chan, smps_mode, 1140 assoc_data->link[link_id].conn_flags); 1141 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1142 } 1143 1144 /* if present, add any custom IEs that go before VHT */ 1145 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1146 extra_elems_len, 1147 offset); 1148 1149 if (sband->band != NL80211_BAND_6GHZ && 1150 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1151 bool mu_mimo_owner = 1152 ieee80211_add_vht_ie(sdata, skb, sband, 1153 &assoc_data->link[link_id].ap_vht_cap, 1154 assoc_data->link[link_id].conn_flags); 1155 1156 if (link) 1157 link->conf->mu_mimo_owner = mu_mimo_owner; 1158 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1159 } 1160 1161 /* 1162 * If AP doesn't support HT, mark HE and EHT as disabled. 1163 * If on the 5GHz band, make sure it supports VHT. 1164 */ 1165 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1166 (sband->band == NL80211_BAND_5GHZ && 1167 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1168 assoc_data->link[link_id].conn_flags |= 1169 IEEE80211_CONN_DISABLE_HE | 1170 IEEE80211_CONN_DISABLE_EHT; 1171 1172 /* if present, add any custom IEs that go before HE */ 1173 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1174 extra_elems_len, 1175 offset); 1176 1177 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1178 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1179 assoc_data->link[link_id].conn_flags); 1180 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1181 } 1182 1183 /* 1184 * careful - need to know about all the present elems before 1185 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1186 * we're going to put it after the ML element 1187 */ 1188 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1189 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1190 1191 if (link_id == assoc_data->assoc_link_id) 1192 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1193 present_elems); 1194 1195 /* crash if somebody gets it wrong */ 1196 present_elems = NULL; 1197 1198 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1199 ieee80211_add_eht_ie(sdata, skb, sband); 1200 1201 if (sband->band == NL80211_BAND_S1GHZ) { 1202 ieee80211_add_aid_request_ie(sdata, skb); 1203 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1204 } 1205 1206 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1207 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1208 1209 if (link) 1210 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1211 1212 return offset; 1213 } 1214 1215 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1216 const u16 *outer, 1217 const u16 *inner) 1218 { 1219 unsigned int skb_len = skb->len; 1220 bool at_extension = false; 1221 bool added = false; 1222 int i, j; 1223 u8 *len, *list_len = NULL; 1224 1225 skb_put_u8(skb, WLAN_EID_EXTENSION); 1226 len = skb_put(skb, 1); 1227 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1228 1229 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1230 u16 elem = outer[i]; 1231 bool have_inner = false; 1232 1233 /* should at least be sorted in the sense of normal -> ext */ 1234 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1235 1236 /* switch to extension list */ 1237 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1238 at_extension = true; 1239 if (!list_len) 1240 skb_put_u8(skb, 0); 1241 list_len = NULL; 1242 } 1243 1244 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1245 if (elem == inner[j]) { 1246 have_inner = true; 1247 break; 1248 } 1249 } 1250 1251 if (have_inner) 1252 continue; 1253 1254 if (!list_len) { 1255 list_len = skb_put(skb, 1); 1256 *list_len = 0; 1257 } 1258 *list_len += 1; 1259 skb_put_u8(skb, (u8)elem); 1260 added = true; 1261 } 1262 1263 /* if we added a list but no extension list, make a zero-len one */ 1264 if (added && (!at_extension || !list_len)) 1265 skb_put_u8(skb, 0); 1266 1267 /* if nothing added remove extension element completely */ 1268 if (!added) 1269 skb_trim(skb, skb_len); 1270 else 1271 *len = skb->len - skb_len - 2; 1272 } 1273 1274 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1275 struct sk_buff *skb, u16 capab, 1276 const struct element *ext_capa, 1277 const u16 *outer_present_elems) 1278 { 1279 struct ieee80211_local *local = sdata->local; 1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1281 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1282 struct ieee80211_multi_link_elem *ml_elem; 1283 struct ieee80211_mle_basic_common_info *common; 1284 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1285 __le16 eml_capa = 0, mld_capa_ops = 0; 1286 unsigned int link_id; 1287 u8 *ml_elem_len; 1288 void *capab_pos; 1289 1290 if (!sdata->vif.valid_links) 1291 return; 1292 1293 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1294 ieee80211_vif_type_p2p(&sdata->vif)); 1295 if (ift_ext_capa) { 1296 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1297 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1298 } 1299 1300 skb_put_u8(skb, WLAN_EID_EXTENSION); 1301 ml_elem_len = skb_put(skb, 1); 1302 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1303 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1304 ml_elem->control = 1305 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1306 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1307 common = skb_put(skb, sizeof(*common)); 1308 common->len = sizeof(*common) + 1309 2; /* MLD capa/ops */ 1310 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1311 1312 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1313 if (eml_capa & 1314 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1315 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1316 common->len += 2; /* EML capabilities */ 1317 ml_elem->control |= 1318 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1319 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1320 } 1321 /* need indication from userspace to support this */ 1322 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1324 1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1327 const u8 *extra_elems; 1328 size_t extra_elems_len; 1329 size_t extra_used; 1330 u8 *subelem_len = NULL; 1331 __le16 ctrl; 1332 1333 if (!assoc_data->link[link_id].bss || 1334 link_id == assoc_data->assoc_link_id) 1335 continue; 1336 1337 extra_elems = assoc_data->link[link_id].elems; 1338 extra_elems_len = assoc_data->link[link_id].elems_len; 1339 1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1341 subelem_len = skb_put(skb, 1); 1342 1343 ctrl = cpu_to_le16(link_id | 1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1346 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1348 skb_put_data(skb, assoc_data->link[link_id].addr, 1349 ETH_ALEN); 1350 /* 1351 * Now add the contents of the (re)association request, 1352 * but the "listen interval" and "current AP address" 1353 * (if applicable) are skipped. So we only have 1354 * the capability field (remember the position and fill 1355 * later), followed by the elements added below by 1356 * calling ieee80211_assoc_link_elems(). 1357 */ 1358 capab_pos = skb_put(skb, 2); 1359 1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1361 ext_capa, 1362 extra_elems, 1363 extra_elems_len, 1364 link_id, NULL, 1365 link_present_elems); 1366 if (extra_elems) 1367 skb_put_data(skb, extra_elems + extra_used, 1368 extra_elems_len - extra_used); 1369 1370 put_unaligned_le16(capab, capab_pos); 1371 1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1373 link_present_elems); 1374 1375 ieee80211_fragment_element(skb, subelem_len, 1376 IEEE80211_MLE_SUBELEM_FRAGMENT); 1377 } 1378 1379 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1380 } 1381 1382 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1383 { 1384 struct ieee80211_local *local = sdata->local; 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1387 struct ieee80211_link_data *link; 1388 struct sk_buff *skb; 1389 struct ieee80211_mgmt *mgmt; 1390 u8 *pos, qos_info, *ie_start; 1391 size_t offset, noffset; 1392 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1393 __le16 listen_int; 1394 struct element *ext_capa = NULL; 1395 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1396 struct ieee80211_prep_tx_info info = {}; 1397 unsigned int link_id, n_links = 0; 1398 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1399 void *capab_pos; 1400 size_t size; 1401 int ret; 1402 1403 /* we know it's writable, cast away the const */ 1404 if (assoc_data->ie_len) 1405 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1406 assoc_data->ie, 1407 assoc_data->ie_len); 1408 1409 sdata_assert_lock(sdata); 1410 1411 size = local->hw.extra_tx_headroom + 1412 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1413 2 + assoc_data->ssid_len + /* SSID */ 1414 assoc_data->ie_len + /* extra IEs */ 1415 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1416 9; /* WMM */ 1417 1418 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1419 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1420 const struct ieee80211_sband_iftype_data *iftd; 1421 struct ieee80211_supported_band *sband; 1422 1423 if (!cbss) 1424 continue; 1425 1426 sband = local->hw.wiphy->bands[cbss->channel->band]; 1427 1428 n_links++; 1429 /* add STA profile elements length */ 1430 size += assoc_data->link[link_id].elems_len; 1431 /* and supported rates length */ 1432 size += 4 + sband->n_bitrates; 1433 /* supported channels */ 1434 size += 2 + 2 * sband->n_channels; 1435 1436 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1437 if (iftd) 1438 size += iftd->vendor_elems.len; 1439 1440 /* power capability */ 1441 size += 4; 1442 1443 /* HT, VHT, HE, EHT */ 1444 size += 2 + sizeof(struct ieee80211_ht_cap); 1445 size += 2 + sizeof(struct ieee80211_vht_cap); 1446 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1447 sizeof(struct ieee80211_he_mcs_nss_supp) + 1448 IEEE80211_HE_PPE_THRES_MAX_LEN; 1449 1450 if (sband->band == NL80211_BAND_6GHZ) 1451 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1452 1453 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1454 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1455 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1456 1457 /* non-inheritance element */ 1458 size += 2 + 2 + PRESENT_ELEMS_MAX; 1459 1460 /* should be the same across all BSSes */ 1461 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1462 capab |= WLAN_CAPABILITY_PRIVACY; 1463 } 1464 1465 if (sdata->vif.valid_links) { 1466 /* consider the multi-link element with STA profile */ 1467 size += sizeof(struct ieee80211_multi_link_elem); 1468 /* max common info field in basic multi-link element */ 1469 size += sizeof(struct ieee80211_mle_basic_common_info) + 1470 2 + /* capa & op */ 1471 2; /* EML capa */ 1472 1473 /* 1474 * The capability elements were already considered above; 1475 * note this over-estimates a bit because there's no 1476 * STA profile for the assoc link. 1477 */ 1478 size += (n_links - 1) * 1479 (1 + 1 + /* subelement ID/length */ 1480 2 + /* STA control */ 1481 1 + ETH_ALEN + 2 /* STA Info field */); 1482 } 1483 1484 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1485 if (WARN_ON(!link)) 1486 return -EINVAL; 1487 1488 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1489 return -EINVAL; 1490 1491 skb = alloc_skb(size, GFP_KERNEL); 1492 if (!skb) 1493 return -ENOMEM; 1494 1495 skb_reserve(skb, local->hw.extra_tx_headroom); 1496 1497 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1498 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1499 1500 /* Set MBSSID support for HE AP if needed */ 1501 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1502 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1503 ext_capa && ext_capa->datalen >= 3) 1504 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1505 1506 mgmt = skb_put_zero(skb, 24); 1507 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1508 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1509 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1510 1511 listen_int = cpu_to_le16(assoc_data->s1g ? 1512 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1513 local->hw.conf.listen_interval); 1514 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1515 skb_put(skb, 10); 1516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1517 IEEE80211_STYPE_REASSOC_REQ); 1518 capab_pos = &mgmt->u.reassoc_req.capab_info; 1519 mgmt->u.reassoc_req.listen_interval = listen_int; 1520 memcpy(mgmt->u.reassoc_req.current_ap, 1521 assoc_data->prev_ap_addr, ETH_ALEN); 1522 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1523 } else { 1524 skb_put(skb, 4); 1525 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1526 IEEE80211_STYPE_ASSOC_REQ); 1527 capab_pos = &mgmt->u.assoc_req.capab_info; 1528 mgmt->u.assoc_req.listen_interval = listen_int; 1529 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1530 } 1531 1532 /* SSID */ 1533 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1534 ie_start = pos; 1535 *pos++ = WLAN_EID_SSID; 1536 *pos++ = assoc_data->ssid_len; 1537 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1538 1539 /* add the elements for the assoc (main) link */ 1540 link_capab = capab; 1541 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1542 ext_capa, 1543 assoc_data->ie, 1544 assoc_data->ie_len, 1545 assoc_data->assoc_link_id, link, 1546 present_elems); 1547 put_unaligned_le16(link_capab, capab_pos); 1548 1549 /* if present, add any custom non-vendor IEs */ 1550 if (assoc_data->ie_len) { 1551 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1552 assoc_data->ie_len, 1553 offset); 1554 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1555 offset = noffset; 1556 } 1557 1558 if (assoc_data->wmm) { 1559 if (assoc_data->uapsd) { 1560 qos_info = ifmgd->uapsd_queues; 1561 qos_info |= (ifmgd->uapsd_max_sp_len << 1562 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1563 } else { 1564 qos_info = 0; 1565 } 1566 1567 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1568 } 1569 1570 /* add any remaining custom (i.e. vendor specific here) IEs */ 1571 if (assoc_data->ie_len) { 1572 noffset = assoc_data->ie_len; 1573 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1574 } 1575 1576 if (assoc_data->fils_kek_len) { 1577 ret = fils_encrypt_assoc_req(skb, assoc_data); 1578 if (ret < 0) { 1579 dev_kfree_skb(skb); 1580 return ret; 1581 } 1582 } 1583 1584 pos = skb_tail_pointer(skb); 1585 kfree(ifmgd->assoc_req_ies); 1586 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1587 if (!ifmgd->assoc_req_ies) { 1588 dev_kfree_skb(skb); 1589 return -ENOMEM; 1590 } 1591 1592 ifmgd->assoc_req_ies_len = pos - ie_start; 1593 1594 drv_mgd_prepare_tx(local, sdata, &info); 1595 1596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1597 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1598 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1599 IEEE80211_TX_INTFL_MLME_CONN_TX; 1600 ieee80211_tx_skb(sdata, skb); 1601 1602 return 0; 1603 } 1604 1605 void ieee80211_send_pspoll(struct ieee80211_local *local, 1606 struct ieee80211_sub_if_data *sdata) 1607 { 1608 struct ieee80211_pspoll *pspoll; 1609 struct sk_buff *skb; 1610 1611 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1612 if (!skb) 1613 return; 1614 1615 pspoll = (struct ieee80211_pspoll *) skb->data; 1616 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1617 1618 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1619 ieee80211_tx_skb(sdata, skb); 1620 } 1621 1622 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1623 struct ieee80211_sub_if_data *sdata, 1624 bool powersave) 1625 { 1626 struct sk_buff *skb; 1627 struct ieee80211_hdr_3addr *nullfunc; 1628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1629 1630 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1631 !ieee80211_hw_check(&local->hw, 1632 DOESNT_SUPPORT_QOS_NDP)); 1633 if (!skb) 1634 return; 1635 1636 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1637 if (powersave) 1638 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1639 1640 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1641 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1642 1643 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1644 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1645 1646 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1647 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1648 1649 ieee80211_tx_skb(sdata, skb); 1650 } 1651 1652 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1653 struct ieee80211_sub_if_data *sdata) 1654 { 1655 struct sk_buff *skb; 1656 struct ieee80211_hdr *nullfunc; 1657 __le16 fc; 1658 1659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1660 return; 1661 1662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1663 if (!skb) 1664 return; 1665 1666 skb_reserve(skb, local->hw.extra_tx_headroom); 1667 1668 nullfunc = skb_put_zero(skb, 30); 1669 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1670 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1671 nullfunc->frame_control = fc; 1672 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1673 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1674 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1675 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1676 1677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1678 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1679 ieee80211_tx_skb(sdata, skb); 1680 } 1681 1682 /* spectrum management related things */ 1683 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1684 struct wiphy_work *work) 1685 { 1686 struct ieee80211_link_data *link = 1687 container_of(work, struct ieee80211_link_data, 1688 u.mgd.chswitch_work.work); 1689 struct ieee80211_sub_if_data *sdata = link->sdata; 1690 struct ieee80211_local *local = sdata->local; 1691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1692 int ret; 1693 1694 if (!ieee80211_sdata_running(sdata)) 1695 return; 1696 1697 sdata_lock(sdata); 1698 mutex_lock(&local->mtx); 1699 mutex_lock(&local->chanctx_mtx); 1700 1701 if (!ifmgd->associated) 1702 goto out; 1703 1704 if (!link->conf->csa_active) 1705 goto out; 1706 1707 /* 1708 * using reservation isn't immediate as it may be deferred until later 1709 * with multi-vif. once reservation is complete it will re-schedule the 1710 * work with no reserved_chanctx so verify chandef to check if it 1711 * completed successfully 1712 */ 1713 1714 if (link->reserved_chanctx) { 1715 /* 1716 * with multi-vif csa driver may call ieee80211_csa_finish() 1717 * many times while waiting for other interfaces to use their 1718 * reservations 1719 */ 1720 if (link->reserved_ready) 1721 goto out; 1722 1723 ret = ieee80211_link_use_reserved_context(link); 1724 if (ret) { 1725 sdata_info(sdata, 1726 "failed to use reserved channel context, disconnecting (err=%d)\n", 1727 ret); 1728 wiphy_work_queue(sdata->local->hw.wiphy, 1729 &ifmgd->csa_connection_drop_work); 1730 goto out; 1731 } 1732 1733 goto out; 1734 } 1735 1736 if (!cfg80211_chandef_identical(&link->conf->chandef, 1737 &link->csa_chandef)) { 1738 sdata_info(sdata, 1739 "failed to finalize channel switch, disconnecting\n"); 1740 wiphy_work_queue(sdata->local->hw.wiphy, 1741 &ifmgd->csa_connection_drop_work); 1742 goto out; 1743 } 1744 1745 link->u.mgd.csa_waiting_bcn = true; 1746 1747 ieee80211_sta_reset_beacon_monitor(sdata); 1748 ieee80211_sta_reset_conn_monitor(sdata); 1749 1750 out: 1751 mutex_unlock(&local->chanctx_mtx); 1752 mutex_unlock(&local->mtx); 1753 sdata_unlock(sdata); 1754 } 1755 1756 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1757 { 1758 struct ieee80211_sub_if_data *sdata = link->sdata; 1759 struct ieee80211_local *local = sdata->local; 1760 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1761 int ret; 1762 1763 sdata_assert_lock(sdata); 1764 1765 WARN_ON(!link->conf->csa_active); 1766 1767 if (link->csa_block_tx) { 1768 ieee80211_wake_vif_queues(local, sdata, 1769 IEEE80211_QUEUE_STOP_REASON_CSA); 1770 link->csa_block_tx = false; 1771 } 1772 1773 link->conf->csa_active = false; 1774 link->u.mgd.csa_waiting_bcn = false; 1775 /* 1776 * If the CSA IE is still present on the beacon after the switch, 1777 * we need to consider it as a new CSA (possibly to self). 1778 */ 1779 link->u.mgd.beacon_crc_valid = false; 1780 1781 ret = drv_post_channel_switch(sdata); 1782 if (ret) { 1783 sdata_info(sdata, 1784 "driver post channel switch failed, disconnecting\n"); 1785 wiphy_work_queue(sdata->local->hw.wiphy, 1786 &ifmgd->csa_connection_drop_work); 1787 return; 1788 } 1789 1790 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1791 } 1792 1793 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1794 { 1795 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1797 1798 if (WARN_ON(sdata->vif.valid_links)) 1799 success = false; 1800 1801 trace_api_chswitch_done(sdata, success); 1802 if (!success) { 1803 sdata_info(sdata, 1804 "driver channel switch failed, disconnecting\n"); 1805 wiphy_work_queue(sdata->local->hw.wiphy, 1806 &ifmgd->csa_connection_drop_work); 1807 } else { 1808 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1809 &sdata->deflink.u.mgd.chswitch_work, 1810 0); 1811 } 1812 } 1813 EXPORT_SYMBOL(ieee80211_chswitch_done); 1814 1815 static void 1816 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1817 { 1818 struct ieee80211_sub_if_data *sdata = link->sdata; 1819 struct ieee80211_local *local = sdata->local; 1820 1821 if (!local->ops->abort_channel_switch) 1822 return; 1823 1824 mutex_lock(&local->mtx); 1825 1826 mutex_lock(&local->chanctx_mtx); 1827 ieee80211_link_unreserve_chanctx(link); 1828 mutex_unlock(&local->chanctx_mtx); 1829 1830 if (link->csa_block_tx) 1831 ieee80211_wake_vif_queues(local, sdata, 1832 IEEE80211_QUEUE_STOP_REASON_CSA); 1833 1834 link->csa_block_tx = false; 1835 link->conf->csa_active = false; 1836 1837 mutex_unlock(&local->mtx); 1838 1839 drv_abort_channel_switch(sdata); 1840 } 1841 1842 static void 1843 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1844 u64 timestamp, u32 device_timestamp, 1845 struct ieee802_11_elems *elems, 1846 bool beacon) 1847 { 1848 struct ieee80211_sub_if_data *sdata = link->sdata; 1849 struct ieee80211_local *local = sdata->local; 1850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1851 struct cfg80211_bss *cbss = link->u.mgd.bss; 1852 struct ieee80211_chanctx_conf *conf; 1853 struct ieee80211_chanctx *chanctx; 1854 enum nl80211_band current_band; 1855 struct ieee80211_csa_ie csa_ie; 1856 struct ieee80211_channel_switch ch_switch; 1857 struct ieee80211_bss *bss; 1858 unsigned long timeout; 1859 int res; 1860 1861 sdata_assert_lock(sdata); 1862 1863 if (!cbss) 1864 return; 1865 1866 if (local->scanning) 1867 return; 1868 1869 current_band = cbss->channel->band; 1870 bss = (void *)cbss->priv; 1871 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1872 bss->vht_cap_info, 1873 link->u.mgd.conn_flags, 1874 link->u.mgd.bssid, &csa_ie); 1875 1876 if (!res) { 1877 ch_switch.timestamp = timestamp; 1878 ch_switch.device_timestamp = device_timestamp; 1879 ch_switch.block_tx = csa_ie.mode; 1880 ch_switch.chandef = csa_ie.chandef; 1881 ch_switch.count = csa_ie.count; 1882 ch_switch.delay = csa_ie.max_switch_time; 1883 } 1884 1885 if (res < 0) 1886 goto lock_and_drop_connection; 1887 1888 if (beacon && link->conf->csa_active && 1889 !link->u.mgd.csa_waiting_bcn) { 1890 if (res) 1891 ieee80211_sta_abort_chanswitch(link); 1892 else 1893 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1894 return; 1895 } else if (link->conf->csa_active || res) { 1896 /* disregard subsequent announcements if already processing */ 1897 return; 1898 } 1899 1900 if (link->conf->chandef.chan->band != 1901 csa_ie.chandef.chan->band) { 1902 sdata_info(sdata, 1903 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1904 link->u.mgd.bssid, 1905 csa_ie.chandef.chan->center_freq, 1906 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1907 csa_ie.chandef.center_freq2); 1908 goto lock_and_drop_connection; 1909 } 1910 1911 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1912 IEEE80211_CHAN_DISABLED)) { 1913 sdata_info(sdata, 1914 "AP %pM switches to unsupported channel " 1915 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1916 "disconnecting\n", 1917 link->u.mgd.bssid, 1918 csa_ie.chandef.chan->center_freq, 1919 csa_ie.chandef.chan->freq_offset, 1920 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1921 csa_ie.chandef.freq1_offset, 1922 csa_ie.chandef.center_freq2); 1923 goto lock_and_drop_connection; 1924 } 1925 1926 if (cfg80211_chandef_identical(&csa_ie.chandef, 1927 &link->conf->chandef) && 1928 (!csa_ie.mode || !beacon)) { 1929 if (link->u.mgd.csa_ignored_same_chan) 1930 return; 1931 sdata_info(sdata, 1932 "AP %pM tries to chanswitch to same channel, ignore\n", 1933 link->u.mgd.bssid); 1934 link->u.mgd.csa_ignored_same_chan = true; 1935 return; 1936 } 1937 1938 /* 1939 * Drop all TDLS peers - either we disconnect or move to a different 1940 * channel from this point on. There's no telling what our peer will do. 1941 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1942 * have an incompatible wider chandef. 1943 */ 1944 ieee80211_teardown_tdls_peers(sdata); 1945 1946 mutex_lock(&local->mtx); 1947 mutex_lock(&local->chanctx_mtx); 1948 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1949 lockdep_is_held(&local->chanctx_mtx)); 1950 if (!conf) { 1951 sdata_info(sdata, 1952 "no channel context assigned to vif?, disconnecting\n"); 1953 goto drop_connection; 1954 } 1955 1956 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1957 1958 if (local->use_chanctx && 1959 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1960 sdata_info(sdata, 1961 "driver doesn't support chan-switch with channel contexts\n"); 1962 goto drop_connection; 1963 } 1964 1965 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1966 sdata_info(sdata, 1967 "preparing for channel switch failed, disconnecting\n"); 1968 goto drop_connection; 1969 } 1970 1971 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1972 chanctx->mode, false); 1973 if (res) { 1974 sdata_info(sdata, 1975 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1976 res); 1977 goto drop_connection; 1978 } 1979 mutex_unlock(&local->chanctx_mtx); 1980 1981 link->conf->csa_active = true; 1982 link->csa_chandef = csa_ie.chandef; 1983 link->csa_block_tx = csa_ie.mode; 1984 link->u.mgd.csa_ignored_same_chan = false; 1985 link->u.mgd.beacon_crc_valid = false; 1986 1987 if (link->csa_block_tx) 1988 ieee80211_stop_vif_queues(local, sdata, 1989 IEEE80211_QUEUE_STOP_REASON_CSA); 1990 mutex_unlock(&local->mtx); 1991 1992 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1993 csa_ie.count, csa_ie.mode, 0); 1994 1995 if (local->ops->channel_switch) { 1996 /* use driver's channel switch callback */ 1997 drv_channel_switch(local, sdata, &ch_switch); 1998 return; 1999 } 2000 2001 /* channel switch handled in software */ 2002 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2003 cbss->beacon_interval); 2004 wiphy_delayed_work_queue(local->hw.wiphy, 2005 &link->u.mgd.chswitch_work, 2006 timeout); 2007 return; 2008 lock_and_drop_connection: 2009 mutex_lock(&local->mtx); 2010 mutex_lock(&local->chanctx_mtx); 2011 drop_connection: 2012 /* 2013 * This is just so that the disconnect flow will know that 2014 * we were trying to switch channel and failed. In case the 2015 * mode is 1 (we are not allowed to Tx), we will know not to 2016 * send a deauthentication frame. Those two fields will be 2017 * reset when the disconnection worker runs. 2018 */ 2019 link->conf->csa_active = true; 2020 link->csa_block_tx = csa_ie.mode; 2021 2022 wiphy_work_queue(sdata->local->hw.wiphy, 2023 &ifmgd->csa_connection_drop_work); 2024 mutex_unlock(&local->chanctx_mtx); 2025 mutex_unlock(&local->mtx); 2026 } 2027 2028 static bool 2029 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2030 struct ieee80211_channel *channel, 2031 const u8 *country_ie, u8 country_ie_len, 2032 const u8 *pwr_constr_elem, 2033 int *chan_pwr, int *pwr_reduction) 2034 { 2035 struct ieee80211_country_ie_triplet *triplet; 2036 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2037 int i, chan_increment; 2038 bool have_chan_pwr = false; 2039 2040 /* Invalid IE */ 2041 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2042 return false; 2043 2044 triplet = (void *)(country_ie + 3); 2045 country_ie_len -= 3; 2046 2047 switch (channel->band) { 2048 default: 2049 WARN_ON_ONCE(1); 2050 fallthrough; 2051 case NL80211_BAND_2GHZ: 2052 case NL80211_BAND_60GHZ: 2053 case NL80211_BAND_LC: 2054 chan_increment = 1; 2055 break; 2056 case NL80211_BAND_5GHZ: 2057 chan_increment = 4; 2058 break; 2059 case NL80211_BAND_6GHZ: 2060 /* 2061 * In the 6 GHz band, the "maximum transmit power level" 2062 * field in the triplets is reserved, and thus will be 2063 * zero and we shouldn't use it to control TX power. 2064 * The actual TX power will be given in the transmit 2065 * power envelope element instead. 2066 */ 2067 return false; 2068 } 2069 2070 /* find channel */ 2071 while (country_ie_len >= 3) { 2072 u8 first_channel = triplet->chans.first_channel; 2073 2074 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2075 goto next; 2076 2077 for (i = 0; i < triplet->chans.num_channels; i++) { 2078 if (first_channel + i * chan_increment == chan) { 2079 have_chan_pwr = true; 2080 *chan_pwr = triplet->chans.max_power; 2081 break; 2082 } 2083 } 2084 if (have_chan_pwr) 2085 break; 2086 2087 next: 2088 triplet++; 2089 country_ie_len -= 3; 2090 } 2091 2092 if (have_chan_pwr && pwr_constr_elem) 2093 *pwr_reduction = *pwr_constr_elem; 2094 else 2095 *pwr_reduction = 0; 2096 2097 return have_chan_pwr; 2098 } 2099 2100 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2101 struct ieee80211_channel *channel, 2102 const u8 *cisco_dtpc_ie, 2103 int *pwr_level) 2104 { 2105 /* From practical testing, the first data byte of the DTPC element 2106 * seems to contain the requested dBm level, and the CLI on Cisco 2107 * APs clearly state the range is -127 to 127 dBm, which indicates 2108 * a signed byte, although it seemingly never actually goes negative. 2109 * The other byte seems to always be zero. 2110 */ 2111 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2112 } 2113 2114 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2115 struct ieee80211_channel *channel, 2116 struct ieee80211_mgmt *mgmt, 2117 const u8 *country_ie, u8 country_ie_len, 2118 const u8 *pwr_constr_ie, 2119 const u8 *cisco_dtpc_ie) 2120 { 2121 struct ieee80211_sub_if_data *sdata = link->sdata; 2122 bool has_80211h_pwr = false, has_cisco_pwr = false; 2123 int chan_pwr = 0, pwr_reduction_80211h = 0; 2124 int pwr_level_cisco, pwr_level_80211h; 2125 int new_ap_level; 2126 __le16 capab = mgmt->u.probe_resp.capab_info; 2127 2128 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2129 return 0; /* TODO */ 2130 2131 if (country_ie && 2132 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2133 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2134 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2135 sdata, channel, country_ie, country_ie_len, 2136 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2137 pwr_level_80211h = 2138 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2139 } 2140 2141 if (cisco_dtpc_ie) { 2142 ieee80211_find_cisco_dtpc( 2143 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2144 has_cisco_pwr = true; 2145 } 2146 2147 if (!has_80211h_pwr && !has_cisco_pwr) 2148 return 0; 2149 2150 /* If we have both 802.11h and Cisco DTPC, apply both limits 2151 * by picking the smallest of the two power levels advertised. 2152 */ 2153 if (has_80211h_pwr && 2154 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2155 new_ap_level = pwr_level_80211h; 2156 2157 if (link->ap_power_level == new_ap_level) 2158 return 0; 2159 2160 sdata_dbg(sdata, 2161 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2162 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2163 link->u.mgd.bssid); 2164 } else { /* has_cisco_pwr is always true here. */ 2165 new_ap_level = pwr_level_cisco; 2166 2167 if (link->ap_power_level == new_ap_level) 2168 return 0; 2169 2170 sdata_dbg(sdata, 2171 "Limiting TX power to %d dBm as advertised by %pM\n", 2172 pwr_level_cisco, link->u.mgd.bssid); 2173 } 2174 2175 link->ap_power_level = new_ap_level; 2176 if (__ieee80211_recalc_txpower(sdata)) 2177 return BSS_CHANGED_TXPOWER; 2178 return 0; 2179 } 2180 2181 /* powersave */ 2182 static void ieee80211_enable_ps(struct ieee80211_local *local, 2183 struct ieee80211_sub_if_data *sdata) 2184 { 2185 struct ieee80211_conf *conf = &local->hw.conf; 2186 2187 /* 2188 * If we are scanning right now then the parameters will 2189 * take effect when scan finishes. 2190 */ 2191 if (local->scanning) 2192 return; 2193 2194 if (conf->dynamic_ps_timeout > 0 && 2195 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2196 mod_timer(&local->dynamic_ps_timer, jiffies + 2197 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2198 } else { 2199 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2200 ieee80211_send_nullfunc(local, sdata, true); 2201 2202 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2203 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2204 return; 2205 2206 conf->flags |= IEEE80211_CONF_PS; 2207 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2208 } 2209 } 2210 2211 static void ieee80211_change_ps(struct ieee80211_local *local) 2212 { 2213 struct ieee80211_conf *conf = &local->hw.conf; 2214 2215 if (local->ps_sdata) { 2216 ieee80211_enable_ps(local, local->ps_sdata); 2217 } else if (conf->flags & IEEE80211_CONF_PS) { 2218 conf->flags &= ~IEEE80211_CONF_PS; 2219 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2220 del_timer_sync(&local->dynamic_ps_timer); 2221 cancel_work_sync(&local->dynamic_ps_enable_work); 2222 } 2223 } 2224 2225 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2226 { 2227 struct ieee80211_local *local = sdata->local; 2228 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2229 struct sta_info *sta = NULL; 2230 bool authorized = false; 2231 2232 if (!mgd->powersave) 2233 return false; 2234 2235 if (mgd->broken_ap) 2236 return false; 2237 2238 if (!mgd->associated) 2239 return false; 2240 2241 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2242 return false; 2243 2244 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2245 !sdata->deflink.u.mgd.have_beacon) 2246 return false; 2247 2248 rcu_read_lock(); 2249 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2250 if (sta) 2251 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2252 rcu_read_unlock(); 2253 2254 return authorized; 2255 } 2256 2257 /* need to hold RTNL or interface lock */ 2258 void ieee80211_recalc_ps(struct ieee80211_local *local) 2259 { 2260 struct ieee80211_sub_if_data *sdata, *found = NULL; 2261 int count = 0; 2262 int timeout; 2263 2264 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2265 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2266 local->ps_sdata = NULL; 2267 return; 2268 } 2269 2270 list_for_each_entry(sdata, &local->interfaces, list) { 2271 if (!ieee80211_sdata_running(sdata)) 2272 continue; 2273 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2274 /* If an AP vif is found, then disable PS 2275 * by setting the count to zero thereby setting 2276 * ps_sdata to NULL. 2277 */ 2278 count = 0; 2279 break; 2280 } 2281 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2282 continue; 2283 found = sdata; 2284 count++; 2285 } 2286 2287 if (count == 1 && ieee80211_powersave_allowed(found)) { 2288 u8 dtimper = found->deflink.u.mgd.dtim_period; 2289 2290 timeout = local->dynamic_ps_forced_timeout; 2291 if (timeout < 0) 2292 timeout = 100; 2293 local->hw.conf.dynamic_ps_timeout = timeout; 2294 2295 /* If the TIM IE is invalid, pretend the value is 1 */ 2296 if (!dtimper) 2297 dtimper = 1; 2298 2299 local->hw.conf.ps_dtim_period = dtimper; 2300 local->ps_sdata = found; 2301 } else { 2302 local->ps_sdata = NULL; 2303 } 2304 2305 ieee80211_change_ps(local); 2306 } 2307 2308 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2309 { 2310 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2311 2312 if (sdata->vif.cfg.ps != ps_allowed) { 2313 sdata->vif.cfg.ps = ps_allowed; 2314 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2315 } 2316 } 2317 2318 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2319 { 2320 struct ieee80211_local *local = 2321 container_of(work, struct ieee80211_local, 2322 dynamic_ps_disable_work); 2323 2324 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2325 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2327 } 2328 2329 ieee80211_wake_queues_by_reason(&local->hw, 2330 IEEE80211_MAX_QUEUE_MAP, 2331 IEEE80211_QUEUE_STOP_REASON_PS, 2332 false); 2333 } 2334 2335 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2336 { 2337 struct ieee80211_local *local = 2338 container_of(work, struct ieee80211_local, 2339 dynamic_ps_enable_work); 2340 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2341 struct ieee80211_if_managed *ifmgd; 2342 unsigned long flags; 2343 int q; 2344 2345 /* can only happen when PS was just disabled anyway */ 2346 if (!sdata) 2347 return; 2348 2349 ifmgd = &sdata->u.mgd; 2350 2351 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2352 return; 2353 2354 if (local->hw.conf.dynamic_ps_timeout > 0) { 2355 /* don't enter PS if TX frames are pending */ 2356 if (drv_tx_frames_pending(local)) { 2357 mod_timer(&local->dynamic_ps_timer, jiffies + 2358 msecs_to_jiffies( 2359 local->hw.conf.dynamic_ps_timeout)); 2360 return; 2361 } 2362 2363 /* 2364 * transmission can be stopped by others which leads to 2365 * dynamic_ps_timer expiry. Postpone the ps timer if it 2366 * is not the actual idle state. 2367 */ 2368 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2369 for (q = 0; q < local->hw.queues; q++) { 2370 if (local->queue_stop_reasons[q]) { 2371 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2372 flags); 2373 mod_timer(&local->dynamic_ps_timer, jiffies + 2374 msecs_to_jiffies( 2375 local->hw.conf.dynamic_ps_timeout)); 2376 return; 2377 } 2378 } 2379 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2380 } 2381 2382 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2383 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2384 if (drv_tx_frames_pending(local)) { 2385 mod_timer(&local->dynamic_ps_timer, jiffies + 2386 msecs_to_jiffies( 2387 local->hw.conf.dynamic_ps_timeout)); 2388 } else { 2389 ieee80211_send_nullfunc(local, sdata, true); 2390 /* Flush to get the tx status of nullfunc frame */ 2391 ieee80211_flush_queues(local, sdata, false); 2392 } 2393 } 2394 2395 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2396 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2397 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2398 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2399 local->hw.conf.flags |= IEEE80211_CONF_PS; 2400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2401 } 2402 } 2403 2404 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2405 { 2406 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2407 2408 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2409 } 2410 2411 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2412 { 2413 struct delayed_work *delayed_work = to_delayed_work(work); 2414 struct ieee80211_link_data *link = 2415 container_of(delayed_work, struct ieee80211_link_data, 2416 dfs_cac_timer_work); 2417 struct cfg80211_chan_def chandef = link->conf->chandef; 2418 struct ieee80211_sub_if_data *sdata = link->sdata; 2419 2420 mutex_lock(&sdata->local->mtx); 2421 if (sdata->wdev.cac_started) { 2422 ieee80211_link_release_channel(link); 2423 cfg80211_cac_event(sdata->dev, &chandef, 2424 NL80211_RADAR_CAC_FINISHED, 2425 GFP_KERNEL); 2426 } 2427 mutex_unlock(&sdata->local->mtx); 2428 } 2429 2430 static bool 2431 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2432 { 2433 struct ieee80211_local *local = sdata->local; 2434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2435 bool ret = false; 2436 int ac; 2437 2438 if (local->hw.queues < IEEE80211_NUM_ACS) 2439 return false; 2440 2441 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2442 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2443 int non_acm_ac; 2444 unsigned long now = jiffies; 2445 2446 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2447 tx_tspec->admitted_time && 2448 time_after(now, tx_tspec->time_slice_start + HZ)) { 2449 tx_tspec->consumed_tx_time = 0; 2450 tx_tspec->time_slice_start = now; 2451 2452 if (tx_tspec->downgraded) 2453 tx_tspec->action = 2454 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2455 } 2456 2457 switch (tx_tspec->action) { 2458 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2459 /* take the original parameters */ 2460 if (drv_conf_tx(local, &sdata->deflink, ac, 2461 &sdata->deflink.tx_conf[ac])) 2462 link_err(&sdata->deflink, 2463 "failed to set TX queue parameters for queue %d\n", 2464 ac); 2465 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2466 tx_tspec->downgraded = false; 2467 ret = true; 2468 break; 2469 case TX_TSPEC_ACTION_DOWNGRADE: 2470 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2471 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2472 ret = true; 2473 break; 2474 } 2475 /* downgrade next lower non-ACM AC */ 2476 for (non_acm_ac = ac + 1; 2477 non_acm_ac < IEEE80211_NUM_ACS; 2478 non_acm_ac++) 2479 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2480 break; 2481 /* Usually the loop will result in using BK even if it 2482 * requires admission control, but such a configuration 2483 * makes no sense and we have to transmit somehow - the 2484 * AC selection does the same thing. 2485 * If we started out trying to downgrade from BK, then 2486 * the extra condition here might be needed. 2487 */ 2488 if (non_acm_ac >= IEEE80211_NUM_ACS) 2489 non_acm_ac = IEEE80211_AC_BK; 2490 if (drv_conf_tx(local, &sdata->deflink, ac, 2491 &sdata->deflink.tx_conf[non_acm_ac])) 2492 link_err(&sdata->deflink, 2493 "failed to set TX queue parameters for queue %d\n", 2494 ac); 2495 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2496 ret = true; 2497 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2498 tx_tspec->time_slice_start + HZ - now + 1); 2499 break; 2500 case TX_TSPEC_ACTION_NONE: 2501 /* nothing now */ 2502 break; 2503 } 2504 } 2505 2506 return ret; 2507 } 2508 2509 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2510 { 2511 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2512 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2513 BSS_CHANGED_QOS); 2514 } 2515 2516 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2517 { 2518 struct ieee80211_sub_if_data *sdata; 2519 2520 sdata = container_of(work, struct ieee80211_sub_if_data, 2521 u.mgd.tx_tspec_wk.work); 2522 ieee80211_sta_handle_tspec_ac_params(sdata); 2523 } 2524 2525 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2526 { 2527 struct ieee80211_sub_if_data *sdata = link->sdata; 2528 struct ieee80211_local *local = sdata->local; 2529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2530 struct ieee80211_tx_queue_params *params = link->tx_conf; 2531 u8 ac; 2532 2533 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2534 mlme_dbg(sdata, 2535 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2536 ac, params[ac].acm, 2537 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2538 params[ac].txop, params[ac].uapsd, 2539 ifmgd->tx_tspec[ac].downgraded); 2540 if (!ifmgd->tx_tspec[ac].downgraded && 2541 drv_conf_tx(local, link, ac, ¶ms[ac])) 2542 link_err(link, 2543 "failed to set TX queue parameters for AC %d\n", 2544 ac); 2545 } 2546 } 2547 2548 /* MLME */ 2549 static bool 2550 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2551 struct ieee80211_link_data *link, 2552 const u8 *wmm_param, size_t wmm_param_len, 2553 const struct ieee80211_mu_edca_param_set *mu_edca) 2554 { 2555 struct ieee80211_sub_if_data *sdata = link->sdata; 2556 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2558 size_t left; 2559 int count, mu_edca_count, ac; 2560 const u8 *pos; 2561 u8 uapsd_queues = 0; 2562 2563 if (!local->ops->conf_tx) 2564 return false; 2565 2566 if (local->hw.queues < IEEE80211_NUM_ACS) 2567 return false; 2568 2569 if (!wmm_param) 2570 return false; 2571 2572 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2573 return false; 2574 2575 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2576 uapsd_queues = ifmgd->uapsd_queues; 2577 2578 count = wmm_param[6] & 0x0f; 2579 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2580 * if mu_edca was preset before and now it disappeared tell 2581 * the driver about it. 2582 */ 2583 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2584 if (count == link->u.mgd.wmm_last_param_set && 2585 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2586 return false; 2587 link->u.mgd.wmm_last_param_set = count; 2588 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2589 2590 pos = wmm_param + 8; 2591 left = wmm_param_len - 8; 2592 2593 memset(¶ms, 0, sizeof(params)); 2594 2595 sdata->wmm_acm = 0; 2596 for (; left >= 4; left -= 4, pos += 4) { 2597 int aci = (pos[0] >> 5) & 0x03; 2598 int acm = (pos[0] >> 4) & 0x01; 2599 bool uapsd = false; 2600 2601 switch (aci) { 2602 case 1: /* AC_BK */ 2603 ac = IEEE80211_AC_BK; 2604 if (acm) 2605 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2606 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2607 uapsd = true; 2608 params[ac].mu_edca = !!mu_edca; 2609 if (mu_edca) 2610 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2611 break; 2612 case 2: /* AC_VI */ 2613 ac = IEEE80211_AC_VI; 2614 if (acm) 2615 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2616 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2617 uapsd = true; 2618 params[ac].mu_edca = !!mu_edca; 2619 if (mu_edca) 2620 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2621 break; 2622 case 3: /* AC_VO */ 2623 ac = IEEE80211_AC_VO; 2624 if (acm) 2625 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2626 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2627 uapsd = true; 2628 params[ac].mu_edca = !!mu_edca; 2629 if (mu_edca) 2630 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2631 break; 2632 case 0: /* AC_BE */ 2633 default: 2634 ac = IEEE80211_AC_BE; 2635 if (acm) 2636 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2637 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2638 uapsd = true; 2639 params[ac].mu_edca = !!mu_edca; 2640 if (mu_edca) 2641 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2642 break; 2643 } 2644 2645 params[ac].aifs = pos[0] & 0x0f; 2646 2647 if (params[ac].aifs < 2) { 2648 sdata_info(sdata, 2649 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2650 params[ac].aifs, aci); 2651 params[ac].aifs = 2; 2652 } 2653 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2654 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2655 params[ac].txop = get_unaligned_le16(pos + 2); 2656 params[ac].acm = acm; 2657 params[ac].uapsd = uapsd; 2658 2659 if (params[ac].cw_min == 0 || 2660 params[ac].cw_min > params[ac].cw_max) { 2661 sdata_info(sdata, 2662 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2663 params[ac].cw_min, params[ac].cw_max, aci); 2664 return false; 2665 } 2666 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2667 } 2668 2669 /* WMM specification requires all 4 ACIs. */ 2670 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2671 if (params[ac].cw_min == 0) { 2672 sdata_info(sdata, 2673 "AP has invalid WMM params (missing AC %d), using defaults\n", 2674 ac); 2675 return false; 2676 } 2677 } 2678 2679 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2680 link->tx_conf[ac] = params[ac]; 2681 2682 ieee80211_mgd_set_link_qos_params(link); 2683 2684 /* enable WMM or activate new settings */ 2685 link->conf->qos = true; 2686 return true; 2687 } 2688 2689 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2690 { 2691 lockdep_assert_held(&sdata->local->mtx); 2692 2693 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2694 ieee80211_run_deferred_scan(sdata->local); 2695 } 2696 2697 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2698 { 2699 mutex_lock(&sdata->local->mtx); 2700 __ieee80211_stop_poll(sdata); 2701 mutex_unlock(&sdata->local->mtx); 2702 } 2703 2704 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2705 u16 capab, bool erp_valid, u8 erp) 2706 { 2707 struct ieee80211_bss_conf *bss_conf = link->conf; 2708 struct ieee80211_supported_band *sband; 2709 u64 changed = 0; 2710 bool use_protection; 2711 bool use_short_preamble; 2712 bool use_short_slot; 2713 2714 sband = ieee80211_get_link_sband(link); 2715 if (!sband) 2716 return changed; 2717 2718 if (erp_valid) { 2719 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2720 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2721 } else { 2722 use_protection = false; 2723 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2724 } 2725 2726 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2727 if (sband->band == NL80211_BAND_5GHZ || 2728 sband->band == NL80211_BAND_6GHZ) 2729 use_short_slot = true; 2730 2731 if (use_protection != bss_conf->use_cts_prot) { 2732 bss_conf->use_cts_prot = use_protection; 2733 changed |= BSS_CHANGED_ERP_CTS_PROT; 2734 } 2735 2736 if (use_short_preamble != bss_conf->use_short_preamble) { 2737 bss_conf->use_short_preamble = use_short_preamble; 2738 changed |= BSS_CHANGED_ERP_PREAMBLE; 2739 } 2740 2741 if (use_short_slot != bss_conf->use_short_slot) { 2742 bss_conf->use_short_slot = use_short_slot; 2743 changed |= BSS_CHANGED_ERP_SLOT; 2744 } 2745 2746 return changed; 2747 } 2748 2749 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2750 struct cfg80211_bss *cbss) 2751 { 2752 struct ieee80211_sub_if_data *sdata = link->sdata; 2753 struct ieee80211_bss_conf *bss_conf = link->conf; 2754 struct ieee80211_bss *bss = (void *)cbss->priv; 2755 u64 changed = BSS_CHANGED_QOS; 2756 2757 /* not really used in MLO */ 2758 sdata->u.mgd.beacon_timeout = 2759 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2760 bss_conf->beacon_int)); 2761 2762 changed |= ieee80211_handle_bss_capability(link, 2763 bss_conf->assoc_capability, 2764 bss->has_erp_value, 2765 bss->erp_value); 2766 2767 ieee80211_check_rate_mask(link); 2768 2769 link->u.mgd.bss = cbss; 2770 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2771 2772 if (sdata->vif.p2p || 2773 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2774 const struct cfg80211_bss_ies *ies; 2775 2776 rcu_read_lock(); 2777 ies = rcu_dereference(cbss->ies); 2778 if (ies) { 2779 int ret; 2780 2781 ret = cfg80211_get_p2p_attr( 2782 ies->data, ies->len, 2783 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2784 (u8 *) &bss_conf->p2p_noa_attr, 2785 sizeof(bss_conf->p2p_noa_attr)); 2786 if (ret >= 2) { 2787 link->u.mgd.p2p_noa_index = 2788 bss_conf->p2p_noa_attr.index; 2789 changed |= BSS_CHANGED_P2P_PS; 2790 } 2791 } 2792 rcu_read_unlock(); 2793 } 2794 2795 if (link->u.mgd.have_beacon) { 2796 bss_conf->beacon_rate = bss->beacon_rate; 2797 changed |= BSS_CHANGED_BEACON_INFO; 2798 } else { 2799 bss_conf->beacon_rate = NULL; 2800 } 2801 2802 /* Tell the driver to monitor connection quality (if supported) */ 2803 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2804 bss_conf->cqm_rssi_thold) 2805 changed |= BSS_CHANGED_CQM; 2806 2807 return changed; 2808 } 2809 2810 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2811 struct ieee80211_mgd_assoc_data *assoc_data, 2812 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2813 { 2814 struct ieee80211_local *local = sdata->local; 2815 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2816 u64 vif_changed = BSS_CHANGED_ASSOC; 2817 unsigned int link_id; 2818 2819 sdata->u.mgd.associated = true; 2820 2821 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2822 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2823 struct ieee80211_link_data *link; 2824 2825 if (!cbss || 2826 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2827 continue; 2828 2829 link = sdata_dereference(sdata->link[link_id], sdata); 2830 if (WARN_ON(!link)) 2831 return; 2832 2833 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2834 } 2835 2836 /* just to be sure */ 2837 ieee80211_stop_poll(sdata); 2838 2839 ieee80211_led_assoc(local, 1); 2840 2841 vif_cfg->assoc = 1; 2842 2843 /* Enable ARP filtering */ 2844 if (vif_cfg->arp_addr_cnt) 2845 vif_changed |= BSS_CHANGED_ARP_FILTER; 2846 2847 if (sdata->vif.valid_links) { 2848 for (link_id = 0; 2849 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2850 link_id++) { 2851 struct ieee80211_link_data *link; 2852 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2853 2854 if (!cbss || 2855 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2856 continue; 2857 2858 link = sdata_dereference(sdata->link[link_id], sdata); 2859 if (WARN_ON(!link)) 2860 return; 2861 2862 ieee80211_link_info_change_notify(sdata, link, 2863 changed[link_id]); 2864 2865 ieee80211_recalc_smps(sdata, link); 2866 } 2867 2868 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2869 } else { 2870 ieee80211_bss_info_change_notify(sdata, 2871 vif_changed | changed[0]); 2872 } 2873 2874 mutex_lock(&local->iflist_mtx); 2875 ieee80211_recalc_ps(local); 2876 mutex_unlock(&local->iflist_mtx); 2877 2878 /* leave this here to not change ordering in non-MLO cases */ 2879 if (!sdata->vif.valid_links) 2880 ieee80211_recalc_smps(sdata, &sdata->deflink); 2881 ieee80211_recalc_ps_vif(sdata); 2882 2883 netif_carrier_on(sdata->dev); 2884 } 2885 2886 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2887 u16 stype, u16 reason, bool tx, 2888 u8 *frame_buf) 2889 { 2890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2891 struct ieee80211_local *local = sdata->local; 2892 unsigned int link_id; 2893 u64 changed = 0; 2894 struct ieee80211_prep_tx_info info = { 2895 .subtype = stype, 2896 }; 2897 2898 sdata_assert_lock(sdata); 2899 2900 if (WARN_ON_ONCE(tx && !frame_buf)) 2901 return; 2902 2903 if (WARN_ON(!ifmgd->associated)) 2904 return; 2905 2906 ieee80211_stop_poll(sdata); 2907 2908 ifmgd->associated = false; 2909 2910 /* other links will be destroyed */ 2911 sdata->deflink.u.mgd.bss = NULL; 2912 2913 netif_carrier_off(sdata->dev); 2914 2915 /* 2916 * if we want to get out of ps before disassoc (why?) we have 2917 * to do it before sending disassoc, as otherwise the null-packet 2918 * won't be valid. 2919 */ 2920 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2921 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2922 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2923 } 2924 local->ps_sdata = NULL; 2925 2926 /* disable per-vif ps */ 2927 ieee80211_recalc_ps_vif(sdata); 2928 2929 /* make sure ongoing transmission finishes */ 2930 synchronize_net(); 2931 2932 /* 2933 * drop any frame before deauth/disassoc, this can be data or 2934 * management frame. Since we are disconnecting, we should not 2935 * insist sending these frames which can take time and delay 2936 * the disconnection and possible the roaming. 2937 */ 2938 if (tx) 2939 ieee80211_flush_queues(local, sdata, true); 2940 2941 /* deauthenticate/disassociate now */ 2942 if (tx || frame_buf) { 2943 /* 2944 * In multi channel scenarios guarantee that the virtual 2945 * interface is granted immediate airtime to transmit the 2946 * deauthentication frame by calling mgd_prepare_tx, if the 2947 * driver requested so. 2948 */ 2949 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2950 !sdata->deflink.u.mgd.have_beacon) { 2951 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2952 } 2953 2954 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2955 sdata->vif.cfg.ap_addr, stype, 2956 reason, tx, frame_buf); 2957 } 2958 2959 /* flush out frame - make sure the deauth was actually sent */ 2960 if (tx) 2961 ieee80211_flush_queues(local, sdata, false); 2962 2963 drv_mgd_complete_tx(sdata->local, sdata, &info); 2964 2965 /* clear AP addr only after building the needed mgmt frames */ 2966 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2967 eth_zero_addr(sdata->vif.cfg.ap_addr); 2968 2969 sdata->vif.cfg.ssid_len = 0; 2970 2971 /* remove AP and TDLS peers */ 2972 sta_info_flush(sdata); 2973 2974 /* finally reset all BSS / config parameters */ 2975 if (!sdata->vif.valid_links) 2976 changed |= ieee80211_reset_erp_info(sdata); 2977 2978 ieee80211_led_assoc(local, 0); 2979 changed |= BSS_CHANGED_ASSOC; 2980 sdata->vif.cfg.assoc = false; 2981 2982 sdata->deflink.u.mgd.p2p_noa_index = -1; 2983 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2984 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2985 2986 /* on the next assoc, re-program HT/VHT parameters */ 2987 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2988 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2989 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2990 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2991 2992 /* 2993 * reset MU-MIMO ownership and group data in default link, 2994 * if used, other links are destroyed 2995 */ 2996 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2997 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2998 memset(sdata->vif.bss_conf.mu_group.position, 0, 2999 sizeof(sdata->vif.bss_conf.mu_group.position)); 3000 if (!sdata->vif.valid_links) 3001 changed |= BSS_CHANGED_MU_GROUPS; 3002 sdata->vif.bss_conf.mu_mimo_owner = false; 3003 3004 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3005 3006 del_timer_sync(&local->dynamic_ps_timer); 3007 cancel_work_sync(&local->dynamic_ps_enable_work); 3008 3009 /* Disable ARP filtering */ 3010 if (sdata->vif.cfg.arp_addr_cnt) 3011 changed |= BSS_CHANGED_ARP_FILTER; 3012 3013 sdata->vif.bss_conf.qos = false; 3014 if (!sdata->vif.valid_links) { 3015 changed |= BSS_CHANGED_QOS; 3016 /* The BSSID (not really interesting) and HT changed */ 3017 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3018 ieee80211_bss_info_change_notify(sdata, changed); 3019 } else { 3020 ieee80211_vif_cfg_change_notify(sdata, changed); 3021 } 3022 3023 /* disassociated - set to defaults now */ 3024 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3025 3026 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3027 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3028 del_timer_sync(&sdata->u.mgd.timer); 3029 3030 sdata->vif.bss_conf.dtim_period = 0; 3031 sdata->vif.bss_conf.beacon_rate = NULL; 3032 3033 sdata->deflink.u.mgd.have_beacon = false; 3034 sdata->deflink.u.mgd.tracking_signal_avg = false; 3035 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3036 3037 ifmgd->flags = 0; 3038 sdata->deflink.u.mgd.conn_flags = 0; 3039 mutex_lock(&local->mtx); 3040 3041 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3042 struct ieee80211_link_data *link; 3043 3044 link = sdata_dereference(sdata->link[link_id], sdata); 3045 if (!link) 3046 continue; 3047 ieee80211_link_release_channel(link); 3048 } 3049 3050 sdata->vif.bss_conf.csa_active = false; 3051 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3052 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3053 if (sdata->deflink.csa_block_tx) { 3054 ieee80211_wake_vif_queues(local, sdata, 3055 IEEE80211_QUEUE_STOP_REASON_CSA); 3056 sdata->deflink.csa_block_tx = false; 3057 } 3058 mutex_unlock(&local->mtx); 3059 3060 /* existing TX TSPEC sessions no longer exist */ 3061 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3062 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3063 3064 sdata->vif.bss_conf.pwr_reduction = 0; 3065 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3066 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3067 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3068 3069 ieee80211_vif_set_links(sdata, 0); 3070 } 3071 3072 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3073 { 3074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3075 struct ieee80211_local *local = sdata->local; 3076 3077 mutex_lock(&local->mtx); 3078 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3079 goto out; 3080 3081 __ieee80211_stop_poll(sdata); 3082 3083 mutex_lock(&local->iflist_mtx); 3084 ieee80211_recalc_ps(local); 3085 mutex_unlock(&local->iflist_mtx); 3086 3087 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3088 goto out; 3089 3090 /* 3091 * We've received a probe response, but are not sure whether 3092 * we have or will be receiving any beacons or data, so let's 3093 * schedule the timers again, just in case. 3094 */ 3095 ieee80211_sta_reset_beacon_monitor(sdata); 3096 3097 mod_timer(&ifmgd->conn_mon_timer, 3098 round_jiffies_up(jiffies + 3099 IEEE80211_CONNECTION_IDLE_TIME)); 3100 out: 3101 mutex_unlock(&local->mtx); 3102 } 3103 3104 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3105 struct ieee80211_hdr *hdr, 3106 u16 tx_time) 3107 { 3108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3109 u16 tid; 3110 int ac; 3111 struct ieee80211_sta_tx_tspec *tx_tspec; 3112 unsigned long now = jiffies; 3113 3114 if (!ieee80211_is_data_qos(hdr->frame_control)) 3115 return; 3116 3117 tid = ieee80211_get_tid(hdr); 3118 ac = ieee80211_ac_from_tid(tid); 3119 tx_tspec = &ifmgd->tx_tspec[ac]; 3120 3121 if (likely(!tx_tspec->admitted_time)) 3122 return; 3123 3124 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3125 tx_tspec->consumed_tx_time = 0; 3126 tx_tspec->time_slice_start = now; 3127 3128 if (tx_tspec->downgraded) { 3129 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3130 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3131 } 3132 } 3133 3134 if (tx_tspec->downgraded) 3135 return; 3136 3137 tx_tspec->consumed_tx_time += tx_time; 3138 3139 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3140 tx_tspec->downgraded = true; 3141 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3142 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3143 } 3144 } 3145 3146 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3147 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3148 { 3149 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3150 3151 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3152 !sdata->u.mgd.probe_send_count) 3153 return; 3154 3155 if (ack) 3156 sdata->u.mgd.probe_send_count = 0; 3157 else 3158 sdata->u.mgd.nullfunc_failed = true; 3159 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3160 } 3161 3162 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3163 const u8 *src, const u8 *dst, 3164 const u8 *ssid, size_t ssid_len, 3165 struct ieee80211_channel *channel) 3166 { 3167 struct sk_buff *skb; 3168 3169 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3170 ssid, ssid_len, NULL, 0, 3171 IEEE80211_PROBE_FLAG_DIRECTED); 3172 if (skb) 3173 ieee80211_tx_skb(sdata, skb); 3174 } 3175 3176 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3177 { 3178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3179 u8 *dst = sdata->vif.cfg.ap_addr; 3180 u8 unicast_limit = max(1, max_probe_tries - 3); 3181 struct sta_info *sta; 3182 3183 if (WARN_ON(sdata->vif.valid_links)) 3184 return; 3185 3186 /* 3187 * Try sending broadcast probe requests for the last three 3188 * probe requests after the first ones failed since some 3189 * buggy APs only support broadcast probe requests. 3190 */ 3191 if (ifmgd->probe_send_count >= unicast_limit) 3192 dst = NULL; 3193 3194 /* 3195 * When the hardware reports an accurate Tx ACK status, it's 3196 * better to send a nullfunc frame instead of a probe request, 3197 * as it will kick us off the AP quickly if we aren't associated 3198 * anymore. The timeout will be reset if the frame is ACKed by 3199 * the AP. 3200 */ 3201 ifmgd->probe_send_count++; 3202 3203 if (dst) { 3204 mutex_lock(&sdata->local->sta_mtx); 3205 sta = sta_info_get(sdata, dst); 3206 if (!WARN_ON(!sta)) 3207 ieee80211_check_fast_rx(sta); 3208 mutex_unlock(&sdata->local->sta_mtx); 3209 } 3210 3211 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3212 ifmgd->nullfunc_failed = false; 3213 ieee80211_send_nullfunc(sdata->local, sdata, false); 3214 } else { 3215 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3216 sdata->vif.cfg.ssid, 3217 sdata->vif.cfg.ssid_len, 3218 sdata->deflink.u.mgd.bss->channel); 3219 } 3220 3221 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3222 run_again(sdata, ifmgd->probe_timeout); 3223 } 3224 3225 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3226 bool beacon) 3227 { 3228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3229 bool already = false; 3230 3231 if (WARN_ON_ONCE(sdata->vif.valid_links)) 3232 return; 3233 3234 if (!ieee80211_sdata_running(sdata)) 3235 return; 3236 3237 sdata_lock(sdata); 3238 3239 if (!ifmgd->associated) 3240 goto out; 3241 3242 mutex_lock(&sdata->local->mtx); 3243 3244 if (sdata->local->tmp_channel || sdata->local->scanning) { 3245 mutex_unlock(&sdata->local->mtx); 3246 goto out; 3247 } 3248 3249 if (sdata->local->suspending) { 3250 /* reschedule after resume */ 3251 mutex_unlock(&sdata->local->mtx); 3252 ieee80211_reset_ap_probe(sdata); 3253 goto out; 3254 } 3255 3256 if (beacon) { 3257 mlme_dbg_ratelimited(sdata, 3258 "detected beacon loss from AP (missed %d beacons) - probing\n", 3259 beacon_loss_count); 3260 3261 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3262 } 3263 3264 /* 3265 * The driver/our work has already reported this event or the 3266 * connection monitoring has kicked in and we have already sent 3267 * a probe request. Or maybe the AP died and the driver keeps 3268 * reporting until we disassociate... 3269 * 3270 * In either case we have to ignore the current call to this 3271 * function (except for setting the correct probe reason bit) 3272 * because otherwise we would reset the timer every time and 3273 * never check whether we received a probe response! 3274 */ 3275 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3276 already = true; 3277 3278 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3279 3280 mutex_unlock(&sdata->local->mtx); 3281 3282 if (already) 3283 goto out; 3284 3285 mutex_lock(&sdata->local->iflist_mtx); 3286 ieee80211_recalc_ps(sdata->local); 3287 mutex_unlock(&sdata->local->iflist_mtx); 3288 3289 ifmgd->probe_send_count = 0; 3290 ieee80211_mgd_probe_ap_send(sdata); 3291 out: 3292 sdata_unlock(sdata); 3293 } 3294 3295 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3296 struct ieee80211_vif *vif) 3297 { 3298 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3300 struct cfg80211_bss *cbss; 3301 struct sk_buff *skb; 3302 const struct element *ssid; 3303 int ssid_len; 3304 3305 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3306 sdata->vif.valid_links)) 3307 return NULL; 3308 3309 sdata_assert_lock(sdata); 3310 3311 if (ifmgd->associated) 3312 cbss = sdata->deflink.u.mgd.bss; 3313 else if (ifmgd->auth_data) 3314 cbss = ifmgd->auth_data->bss; 3315 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3316 cbss = ifmgd->assoc_data->link[0].bss; 3317 else 3318 return NULL; 3319 3320 rcu_read_lock(); 3321 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3322 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3323 "invalid SSID element (len=%d)", 3324 ssid ? ssid->datalen : -1)) 3325 ssid_len = 0; 3326 else 3327 ssid_len = ssid->datalen; 3328 3329 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3330 (u32) -1, cbss->channel, 3331 ssid->data, ssid_len, 3332 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3333 rcu_read_unlock(); 3334 3335 return skb; 3336 } 3337 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3338 3339 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3340 const u8 *buf, size_t len, bool tx, 3341 u16 reason, bool reconnect) 3342 { 3343 struct ieee80211_event event = { 3344 .type = MLME_EVENT, 3345 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3346 .u.mlme.reason = reason, 3347 }; 3348 3349 if (tx) 3350 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3351 else 3352 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3353 3354 drv_event_callback(sdata->local, sdata, &event); 3355 } 3356 3357 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3358 { 3359 struct ieee80211_local *local = sdata->local; 3360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3361 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3362 bool tx; 3363 3364 sdata_lock(sdata); 3365 if (!ifmgd->associated) { 3366 sdata_unlock(sdata); 3367 return; 3368 } 3369 3370 /* in MLO assume we have a link where we can TX the frame */ 3371 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3372 3373 if (!ifmgd->driver_disconnect) { 3374 unsigned int link_id; 3375 3376 /* 3377 * AP is probably out of range (or not reachable for another 3378 * reason) so remove the bss structs for that AP. In the case 3379 * of multi-link, it's not clear that all of them really are 3380 * out of range, but if they weren't the driver likely would 3381 * have switched to just have a single link active? 3382 */ 3383 for (link_id = 0; 3384 link_id < ARRAY_SIZE(sdata->link); 3385 link_id++) { 3386 struct ieee80211_link_data *link; 3387 3388 link = sdata_dereference(sdata->link[link_id], sdata); 3389 if (!link) 3390 continue; 3391 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3392 link->u.mgd.bss = NULL; 3393 } 3394 } 3395 3396 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3397 ifmgd->driver_disconnect ? 3398 WLAN_REASON_DEAUTH_LEAVING : 3399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3400 tx, frame_buf); 3401 mutex_lock(&local->mtx); 3402 /* the other links will be destroyed */ 3403 sdata->vif.bss_conf.csa_active = false; 3404 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3405 if (sdata->deflink.csa_block_tx) { 3406 ieee80211_wake_vif_queues(local, sdata, 3407 IEEE80211_QUEUE_STOP_REASON_CSA); 3408 sdata->deflink.csa_block_tx = false; 3409 } 3410 mutex_unlock(&local->mtx); 3411 3412 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3413 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3414 ifmgd->reconnect); 3415 ifmgd->reconnect = false; 3416 3417 sdata_unlock(sdata); 3418 } 3419 3420 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3421 struct wiphy_work *work) 3422 { 3423 struct ieee80211_sub_if_data *sdata = 3424 container_of(work, struct ieee80211_sub_if_data, 3425 u.mgd.beacon_connection_loss_work); 3426 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3427 3428 if (ifmgd->connection_loss) { 3429 sdata_info(sdata, "Connection to AP %pM lost\n", 3430 sdata->vif.cfg.ap_addr); 3431 __ieee80211_disconnect(sdata); 3432 ifmgd->connection_loss = false; 3433 } else if (ifmgd->driver_disconnect) { 3434 sdata_info(sdata, 3435 "Driver requested disconnection from AP %pM\n", 3436 sdata->vif.cfg.ap_addr); 3437 __ieee80211_disconnect(sdata); 3438 ifmgd->driver_disconnect = false; 3439 } else { 3440 if (ifmgd->associated) 3441 sdata->deflink.u.mgd.beacon_loss_count++; 3442 ieee80211_mgd_probe_ap(sdata, true); 3443 } 3444 } 3445 3446 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3447 struct wiphy_work *work) 3448 { 3449 struct ieee80211_sub_if_data *sdata = 3450 container_of(work, struct ieee80211_sub_if_data, 3451 u.mgd.csa_connection_drop_work); 3452 3453 __ieee80211_disconnect(sdata); 3454 } 3455 3456 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3457 { 3458 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3459 struct ieee80211_hw *hw = &sdata->local->hw; 3460 3461 trace_api_beacon_loss(sdata); 3462 3463 sdata->u.mgd.connection_loss = false; 3464 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3465 } 3466 EXPORT_SYMBOL(ieee80211_beacon_loss); 3467 3468 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3469 { 3470 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3471 struct ieee80211_hw *hw = &sdata->local->hw; 3472 3473 trace_api_connection_loss(sdata); 3474 3475 sdata->u.mgd.connection_loss = true; 3476 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3477 } 3478 EXPORT_SYMBOL(ieee80211_connection_loss); 3479 3480 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3481 { 3482 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3483 struct ieee80211_hw *hw = &sdata->local->hw; 3484 3485 trace_api_disconnect(sdata, reconnect); 3486 3487 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3488 return; 3489 3490 sdata->u.mgd.driver_disconnect = true; 3491 sdata->u.mgd.reconnect = reconnect; 3492 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3493 } 3494 EXPORT_SYMBOL(ieee80211_disconnect); 3495 3496 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3497 bool assoc) 3498 { 3499 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3500 3501 sdata_assert_lock(sdata); 3502 3503 if (!assoc) { 3504 /* 3505 * we are not authenticated yet, the only timer that could be 3506 * running is the timeout for the authentication response which 3507 * which is not relevant anymore. 3508 */ 3509 del_timer_sync(&sdata->u.mgd.timer); 3510 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3511 3512 /* other links are destroyed */ 3513 sdata->deflink.u.mgd.conn_flags = 0; 3514 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3515 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3516 BSS_CHANGED_BSSID); 3517 sdata->u.mgd.flags = 0; 3518 3519 mutex_lock(&sdata->local->mtx); 3520 ieee80211_link_release_channel(&sdata->deflink); 3521 ieee80211_vif_set_links(sdata, 0); 3522 mutex_unlock(&sdata->local->mtx); 3523 } 3524 3525 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3526 kfree(auth_data); 3527 sdata->u.mgd.auth_data = NULL; 3528 } 3529 3530 enum assoc_status { 3531 ASSOC_SUCCESS, 3532 ASSOC_REJECTED, 3533 ASSOC_TIMEOUT, 3534 ASSOC_ABANDON, 3535 }; 3536 3537 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3538 enum assoc_status status) 3539 { 3540 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3541 3542 sdata_assert_lock(sdata); 3543 3544 if (status != ASSOC_SUCCESS) { 3545 /* 3546 * we are not associated yet, the only timer that could be 3547 * running is the timeout for the association response which 3548 * which is not relevant anymore. 3549 */ 3550 del_timer_sync(&sdata->u.mgd.timer); 3551 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3552 3553 sdata->deflink.u.mgd.conn_flags = 0; 3554 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3555 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3556 BSS_CHANGED_BSSID); 3557 sdata->u.mgd.flags = 0; 3558 sdata->vif.bss_conf.mu_mimo_owner = false; 3559 3560 if (status != ASSOC_REJECTED) { 3561 struct cfg80211_assoc_failure data = { 3562 .timeout = status == ASSOC_TIMEOUT, 3563 }; 3564 int i; 3565 3566 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3567 ARRAY_SIZE(assoc_data->link)); 3568 3569 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3570 data.bss[i] = assoc_data->link[i].bss; 3571 3572 if (sdata->vif.valid_links) 3573 data.ap_mld_addr = assoc_data->ap_addr; 3574 3575 cfg80211_assoc_failure(sdata->dev, &data); 3576 } 3577 3578 mutex_lock(&sdata->local->mtx); 3579 ieee80211_link_release_channel(&sdata->deflink); 3580 ieee80211_vif_set_links(sdata, 0); 3581 mutex_unlock(&sdata->local->mtx); 3582 } 3583 3584 kfree(assoc_data); 3585 sdata->u.mgd.assoc_data = NULL; 3586 } 3587 3588 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3589 struct ieee80211_mgmt *mgmt, size_t len) 3590 { 3591 struct ieee80211_local *local = sdata->local; 3592 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3593 const struct element *challenge; 3594 u8 *pos; 3595 u32 tx_flags = 0; 3596 struct ieee80211_prep_tx_info info = { 3597 .subtype = IEEE80211_STYPE_AUTH, 3598 }; 3599 3600 pos = mgmt->u.auth.variable; 3601 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3602 len - (pos - (u8 *)mgmt)); 3603 if (!challenge) 3604 return; 3605 auth_data->expected_transaction = 4; 3606 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3607 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3608 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3609 IEEE80211_TX_INTFL_MLME_CONN_TX; 3610 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3611 (void *)challenge, 3612 challenge->datalen + sizeof(*challenge), 3613 auth_data->ap_addr, auth_data->ap_addr, 3614 auth_data->key, auth_data->key_len, 3615 auth_data->key_idx, tx_flags); 3616 } 3617 3618 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3619 { 3620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3621 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3622 struct sta_info *sta; 3623 bool result = true; 3624 3625 sdata_info(sdata, "authenticated\n"); 3626 ifmgd->auth_data->done = true; 3627 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3628 ifmgd->auth_data->timeout_started = true; 3629 run_again(sdata, ifmgd->auth_data->timeout); 3630 3631 /* move station state to auth */ 3632 mutex_lock(&sdata->local->sta_mtx); 3633 sta = sta_info_get(sdata, ap_addr); 3634 if (!sta) { 3635 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3636 result = false; 3637 goto out; 3638 } 3639 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3640 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3641 result = false; 3642 goto out; 3643 } 3644 3645 out: 3646 mutex_unlock(&sdata->local->sta_mtx); 3647 return result; 3648 } 3649 3650 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3651 struct ieee80211_mgmt *mgmt, size_t len) 3652 { 3653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3654 u16 auth_alg, auth_transaction, status_code; 3655 struct ieee80211_event event = { 3656 .type = MLME_EVENT, 3657 .u.mlme.data = AUTH_EVENT, 3658 }; 3659 struct ieee80211_prep_tx_info info = { 3660 .subtype = IEEE80211_STYPE_AUTH, 3661 }; 3662 3663 sdata_assert_lock(sdata); 3664 3665 if (len < 24 + 6) 3666 return; 3667 3668 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3669 return; 3670 3671 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3672 return; 3673 3674 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3675 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3676 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3677 3678 if (auth_alg != ifmgd->auth_data->algorithm || 3679 (auth_alg != WLAN_AUTH_SAE && 3680 auth_transaction != ifmgd->auth_data->expected_transaction) || 3681 (auth_alg == WLAN_AUTH_SAE && 3682 (auth_transaction < ifmgd->auth_data->expected_transaction || 3683 auth_transaction > 2))) { 3684 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3685 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3686 auth_transaction, 3687 ifmgd->auth_data->expected_transaction); 3688 goto notify_driver; 3689 } 3690 3691 if (status_code != WLAN_STATUS_SUCCESS) { 3692 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3693 3694 if (auth_alg == WLAN_AUTH_SAE && 3695 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3696 (auth_transaction == 1 && 3697 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3698 status_code == WLAN_STATUS_SAE_PK)))) { 3699 /* waiting for userspace now */ 3700 ifmgd->auth_data->waiting = true; 3701 ifmgd->auth_data->timeout = 3702 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3703 ifmgd->auth_data->timeout_started = true; 3704 run_again(sdata, ifmgd->auth_data->timeout); 3705 goto notify_driver; 3706 } 3707 3708 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3709 mgmt->sa, status_code); 3710 ieee80211_destroy_auth_data(sdata, false); 3711 event.u.mlme.status = MLME_DENIED; 3712 event.u.mlme.reason = status_code; 3713 drv_event_callback(sdata->local, sdata, &event); 3714 goto notify_driver; 3715 } 3716 3717 switch (ifmgd->auth_data->algorithm) { 3718 case WLAN_AUTH_OPEN: 3719 case WLAN_AUTH_LEAP: 3720 case WLAN_AUTH_FT: 3721 case WLAN_AUTH_SAE: 3722 case WLAN_AUTH_FILS_SK: 3723 case WLAN_AUTH_FILS_SK_PFS: 3724 case WLAN_AUTH_FILS_PK: 3725 break; 3726 case WLAN_AUTH_SHARED_KEY: 3727 if (ifmgd->auth_data->expected_transaction != 4) { 3728 ieee80211_auth_challenge(sdata, mgmt, len); 3729 /* need another frame */ 3730 return; 3731 } 3732 break; 3733 default: 3734 WARN_ONCE(1, "invalid auth alg %d", 3735 ifmgd->auth_data->algorithm); 3736 goto notify_driver; 3737 } 3738 3739 event.u.mlme.status = MLME_SUCCESS; 3740 info.success = 1; 3741 drv_event_callback(sdata->local, sdata, &event); 3742 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3743 (auth_transaction == 2 && 3744 ifmgd->auth_data->expected_transaction == 2)) { 3745 if (!ieee80211_mark_sta_auth(sdata)) 3746 return; /* ignore frame -- wait for timeout */ 3747 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3748 auth_transaction == 2) { 3749 sdata_info(sdata, "SAE peer confirmed\n"); 3750 ifmgd->auth_data->peer_confirmed = true; 3751 } 3752 3753 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3754 notify_driver: 3755 drv_mgd_complete_tx(sdata->local, sdata, &info); 3756 } 3757 3758 #define case_WLAN(type) \ 3759 case WLAN_REASON_##type: return #type 3760 3761 const char *ieee80211_get_reason_code_string(u16 reason_code) 3762 { 3763 switch (reason_code) { 3764 case_WLAN(UNSPECIFIED); 3765 case_WLAN(PREV_AUTH_NOT_VALID); 3766 case_WLAN(DEAUTH_LEAVING); 3767 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3768 case_WLAN(DISASSOC_AP_BUSY); 3769 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3770 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3771 case_WLAN(DISASSOC_STA_HAS_LEFT); 3772 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3773 case_WLAN(DISASSOC_BAD_POWER); 3774 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3775 case_WLAN(INVALID_IE); 3776 case_WLAN(MIC_FAILURE); 3777 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3778 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3779 case_WLAN(IE_DIFFERENT); 3780 case_WLAN(INVALID_GROUP_CIPHER); 3781 case_WLAN(INVALID_PAIRWISE_CIPHER); 3782 case_WLAN(INVALID_AKMP); 3783 case_WLAN(UNSUPP_RSN_VERSION); 3784 case_WLAN(INVALID_RSN_IE_CAP); 3785 case_WLAN(IEEE8021X_FAILED); 3786 case_WLAN(CIPHER_SUITE_REJECTED); 3787 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3788 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3789 case_WLAN(DISASSOC_LOW_ACK); 3790 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3791 case_WLAN(QSTA_LEAVE_QBSS); 3792 case_WLAN(QSTA_NOT_USE); 3793 case_WLAN(QSTA_REQUIRE_SETUP); 3794 case_WLAN(QSTA_TIMEOUT); 3795 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3796 case_WLAN(MESH_PEER_CANCELED); 3797 case_WLAN(MESH_MAX_PEERS); 3798 case_WLAN(MESH_CONFIG); 3799 case_WLAN(MESH_CLOSE); 3800 case_WLAN(MESH_MAX_RETRIES); 3801 case_WLAN(MESH_CONFIRM_TIMEOUT); 3802 case_WLAN(MESH_INVALID_GTK); 3803 case_WLAN(MESH_INCONSISTENT_PARAM); 3804 case_WLAN(MESH_INVALID_SECURITY); 3805 case_WLAN(MESH_PATH_ERROR); 3806 case_WLAN(MESH_PATH_NOFORWARD); 3807 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3808 case_WLAN(MAC_EXISTS_IN_MBSS); 3809 case_WLAN(MESH_CHAN_REGULATORY); 3810 case_WLAN(MESH_CHAN); 3811 default: return "<unknown>"; 3812 } 3813 } 3814 3815 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3816 struct ieee80211_mgmt *mgmt, size_t len) 3817 { 3818 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3819 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3820 3821 sdata_assert_lock(sdata); 3822 3823 if (len < 24 + 2) 3824 return; 3825 3826 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3827 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3828 return; 3829 } 3830 3831 if (ifmgd->associated && 3832 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3833 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3834 sdata->vif.cfg.ap_addr, reason_code, 3835 ieee80211_get_reason_code_string(reason_code)); 3836 3837 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3838 3839 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3840 reason_code, false); 3841 return; 3842 } 3843 3844 if (ifmgd->assoc_data && 3845 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3846 sdata_info(sdata, 3847 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3848 ifmgd->assoc_data->ap_addr, reason_code, 3849 ieee80211_get_reason_code_string(reason_code)); 3850 3851 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3852 3853 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3854 return; 3855 } 3856 } 3857 3858 3859 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3860 struct ieee80211_mgmt *mgmt, size_t len) 3861 { 3862 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3863 u16 reason_code; 3864 3865 sdata_assert_lock(sdata); 3866 3867 if (len < 24 + 2) 3868 return; 3869 3870 if (!ifmgd->associated || 3871 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3872 return; 3873 3874 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3875 3876 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3877 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3878 return; 3879 } 3880 3881 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3882 sdata->vif.cfg.ap_addr, reason_code, 3883 ieee80211_get_reason_code_string(reason_code)); 3884 3885 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3886 3887 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3888 false); 3889 } 3890 3891 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3892 u8 *supp_rates, unsigned int supp_rates_len, 3893 u32 *rates, u32 *basic_rates, 3894 bool *have_higher_than_11mbit, 3895 int *min_rate, int *min_rate_index, 3896 int shift) 3897 { 3898 int i, j; 3899 3900 for (i = 0; i < supp_rates_len; i++) { 3901 int rate = supp_rates[i] & 0x7f; 3902 bool is_basic = !!(supp_rates[i] & 0x80); 3903 3904 if ((rate * 5 * (1 << shift)) > 110) 3905 *have_higher_than_11mbit = true; 3906 3907 /* 3908 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3909 * selectors since they're not rates. 3910 * 3911 * Note: Even though the membership selector and the basic 3912 * rate flag share the same bit, they are not exactly 3913 * the same. 3914 */ 3915 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3916 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3917 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3918 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3919 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3920 continue; 3921 3922 for (j = 0; j < sband->n_bitrates; j++) { 3923 struct ieee80211_rate *br; 3924 int brate; 3925 3926 br = &sband->bitrates[j]; 3927 3928 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3929 if (brate == rate) { 3930 *rates |= BIT(j); 3931 if (is_basic) 3932 *basic_rates |= BIT(j); 3933 if ((rate * 5) < *min_rate) { 3934 *min_rate = rate * 5; 3935 *min_rate_index = j; 3936 } 3937 break; 3938 } 3939 } 3940 } 3941 } 3942 3943 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3944 struct ieee80211_supported_band *sband, 3945 const struct link_sta_info *link_sta, 3946 const struct ieee802_11_elems *elems) 3947 { 3948 const struct ieee80211_sta_he_cap *own_he_cap = 3949 ieee80211_get_he_iftype_cap(sband, 3950 ieee80211_vif_type_p2p(&sdata->vif)); 3951 3952 if (elems->ext_capab_len < 10) 3953 return false; 3954 3955 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3956 return false; 3957 3958 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3959 IEEE80211_HE_MAC_CAP0_TWT_RES && 3960 own_he_cap && 3961 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3962 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3963 } 3964 3965 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3966 struct ieee80211_supported_band *sband, 3967 struct ieee80211_link_data *link, 3968 struct link_sta_info *link_sta, 3969 struct ieee802_11_elems *elems) 3970 { 3971 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3972 3973 if (link->conf->twt_requester != twt) { 3974 link->conf->twt_requester = twt; 3975 return BSS_CHANGED_TWT; 3976 } 3977 return 0; 3978 } 3979 3980 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3981 struct ieee80211_bss_conf *bss_conf, 3982 struct ieee80211_supported_band *sband, 3983 struct link_sta_info *link_sta) 3984 { 3985 const struct ieee80211_sta_he_cap *own_he_cap = 3986 ieee80211_get_he_iftype_cap(sband, 3987 ieee80211_vif_type_p2p(&sdata->vif)); 3988 3989 return bss_conf->he_support && 3990 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3991 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3992 own_he_cap && 3993 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3994 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3995 } 3996 3997 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3998 struct link_sta_info *link_sta, 3999 struct cfg80211_bss *cbss, 4000 struct ieee80211_mgmt *mgmt, 4001 const u8 *elem_start, 4002 unsigned int elem_len, 4003 u64 *changed) 4004 { 4005 struct ieee80211_sub_if_data *sdata = link->sdata; 4006 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4007 struct ieee80211_bss_conf *bss_conf = link->conf; 4008 struct ieee80211_local *local = sdata->local; 4009 unsigned int link_id = link->link_id; 4010 struct ieee80211_elems_parse_params parse_params = { 4011 .start = elem_start, 4012 .len = elem_len, 4013 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4014 .from_ap = true, 4015 }; 4016 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4017 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4018 const struct cfg80211_bss_ies *bss_ies = NULL; 4019 struct ieee80211_supported_band *sband; 4020 struct ieee802_11_elems *elems; 4021 u16 capab_info; 4022 bool ret; 4023 4024 elems = ieee802_11_parse_elems_full(&parse_params); 4025 if (!elems) 4026 return false; 4027 4028 if (link_id == assoc_data->assoc_link_id) { 4029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4030 4031 /* 4032 * we should not get to this flow unless the association was 4033 * successful, so set the status directly to success 4034 */ 4035 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4036 } else if (!elems->prof) { 4037 ret = false; 4038 goto out; 4039 } else { 4040 const u8 *ptr = elems->prof->variable + 4041 elems->prof->sta_info_len - 1; 4042 4043 /* 4044 * During parsing, we validated that these fields exist, 4045 * otherwise elems->prof would have been set to NULL. 4046 */ 4047 capab_info = get_unaligned_le16(ptr); 4048 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4049 4050 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4051 link_info(link, "association response status code=%u\n", 4052 assoc_data->link[link_id].status); 4053 ret = true; 4054 goto out; 4055 } 4056 } 4057 4058 if (!is_s1g && !elems->supp_rates) { 4059 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4060 ret = false; 4061 goto out; 4062 } 4063 4064 link->u.mgd.tdls_chan_switch_prohibited = 4065 elems->ext_capab && elems->ext_capab_len >= 5 && 4066 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4067 4068 /* 4069 * Some APs are erroneously not including some information in their 4070 * (re)association response frames. Try to recover by using the data 4071 * from the beacon or probe response. This seems to afflict mobile 4072 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4073 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4074 */ 4075 if (!is_6ghz && 4076 ((assoc_data->wmm && !elems->wmm_param) || 4077 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4078 (!elems->ht_cap_elem || !elems->ht_operation)) || 4079 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4080 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4081 const struct cfg80211_bss_ies *ies; 4082 struct ieee802_11_elems *bss_elems; 4083 4084 rcu_read_lock(); 4085 ies = rcu_dereference(cbss->ies); 4086 if (ies) 4087 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4088 GFP_ATOMIC); 4089 rcu_read_unlock(); 4090 if (!bss_ies) { 4091 ret = false; 4092 goto out; 4093 } 4094 4095 parse_params.start = bss_ies->data; 4096 parse_params.len = bss_ies->len; 4097 parse_params.bss = cbss; 4098 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4099 if (!bss_elems) { 4100 ret = false; 4101 goto out; 4102 } 4103 4104 if (assoc_data->wmm && 4105 !elems->wmm_param && bss_elems->wmm_param) { 4106 elems->wmm_param = bss_elems->wmm_param; 4107 sdata_info(sdata, 4108 "AP bug: WMM param missing from AssocResp\n"); 4109 } 4110 4111 /* 4112 * Also check if we requested HT/VHT, otherwise the AP doesn't 4113 * have to include the IEs in the (re)association response. 4114 */ 4115 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4116 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4117 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4118 sdata_info(sdata, 4119 "AP bug: HT capability missing from AssocResp\n"); 4120 } 4121 if (!elems->ht_operation && bss_elems->ht_operation && 4122 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4123 elems->ht_operation = bss_elems->ht_operation; 4124 sdata_info(sdata, 4125 "AP bug: HT operation missing from AssocResp\n"); 4126 } 4127 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4128 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4129 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4130 sdata_info(sdata, 4131 "AP bug: VHT capa missing from AssocResp\n"); 4132 } 4133 if (!elems->vht_operation && bss_elems->vht_operation && 4134 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4135 elems->vht_operation = bss_elems->vht_operation; 4136 sdata_info(sdata, 4137 "AP bug: VHT operation missing from AssocResp\n"); 4138 } 4139 4140 kfree(bss_elems); 4141 } 4142 4143 /* 4144 * We previously checked these in the beacon/probe response, so 4145 * they should be present here. This is just a safety net. 4146 */ 4147 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4148 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4149 sdata_info(sdata, 4150 "HT AP is missing WMM params or HT capability/operation\n"); 4151 ret = false; 4152 goto out; 4153 } 4154 4155 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4156 (!elems->vht_cap_elem || !elems->vht_operation)) { 4157 sdata_info(sdata, 4158 "VHT AP is missing VHT capability/operation\n"); 4159 ret = false; 4160 goto out; 4161 } 4162 4163 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4164 !elems->he_6ghz_capa) { 4165 sdata_info(sdata, 4166 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4167 ret = false; 4168 goto out; 4169 } 4170 4171 if (WARN_ON(!link->conf->chandef.chan)) { 4172 ret = false; 4173 goto out; 4174 } 4175 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4176 4177 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4178 (!elems->he_cap || !elems->he_operation)) { 4179 sdata_info(sdata, 4180 "HE AP is missing HE capability/operation\n"); 4181 ret = false; 4182 goto out; 4183 } 4184 4185 /* Set up internal HT/VHT capabilities */ 4186 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4187 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4188 elems->ht_cap_elem, 4189 link_sta); 4190 4191 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4192 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4193 elems->vht_cap_elem, 4194 link_sta); 4195 4196 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4197 elems->he_cap) { 4198 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4199 elems->he_cap, 4200 elems->he_cap_len, 4201 elems->he_6ghz_capa, 4202 link_sta); 4203 4204 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4205 if (elems->rsnx && elems->rsnx_len && 4206 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4207 wiphy_ext_feature_isset(local->hw.wiphy, 4208 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4209 bss_conf->twt_protected = true; 4210 else 4211 bss_conf->twt_protected = false; 4212 4213 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4214 link_sta, elems); 4215 4216 if (elems->eht_operation && elems->eht_cap && 4217 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4218 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4219 elems->he_cap, 4220 elems->he_cap_len, 4221 elems->eht_cap, 4222 elems->eht_cap_len, 4223 link_sta); 4224 4225 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4226 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4227 } else { 4228 bss_conf->eht_support = false; 4229 } 4230 } else { 4231 bss_conf->he_support = false; 4232 bss_conf->twt_requester = false; 4233 bss_conf->twt_protected = false; 4234 bss_conf->eht_support = false; 4235 } 4236 4237 bss_conf->twt_broadcast = 4238 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4239 4240 if (bss_conf->he_support) { 4241 bss_conf->he_bss_color.color = 4242 le32_get_bits(elems->he_operation->he_oper_params, 4243 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4244 bss_conf->he_bss_color.partial = 4245 le32_get_bits(elems->he_operation->he_oper_params, 4246 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4247 bss_conf->he_bss_color.enabled = 4248 !le32_get_bits(elems->he_operation->he_oper_params, 4249 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4250 4251 if (bss_conf->he_bss_color.enabled) 4252 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4253 4254 bss_conf->htc_trig_based_pkt_ext = 4255 le32_get_bits(elems->he_operation->he_oper_params, 4256 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4257 bss_conf->frame_time_rts_th = 4258 le32_get_bits(elems->he_operation->he_oper_params, 4259 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4260 4261 bss_conf->uora_exists = !!elems->uora_element; 4262 if (elems->uora_element) 4263 bss_conf->uora_ocw_range = elems->uora_element[0]; 4264 4265 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4266 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4267 /* TODO: OPEN: what happens if BSS color disable is set? */ 4268 } 4269 4270 if (cbss->transmitted_bss) { 4271 bss_conf->nontransmitted = true; 4272 ether_addr_copy(bss_conf->transmitter_bssid, 4273 cbss->transmitted_bss->bssid); 4274 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4275 bss_conf->bssid_index = cbss->bssid_index; 4276 } 4277 4278 /* 4279 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4280 * in their association response, so ignore that data for our own 4281 * configuration. If it changed since the last beacon, we'll get the 4282 * next beacon and update then. 4283 */ 4284 4285 /* 4286 * If an operating mode notification IE is present, override the 4287 * NSS calculation (that would be done in rate_control_rate_init()) 4288 * and use the # of streams from that element. 4289 */ 4290 if (elems->opmode_notif && 4291 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4292 u8 nss; 4293 4294 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4295 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4296 nss += 1; 4297 link_sta->pub->rx_nss = nss; 4298 } 4299 4300 /* 4301 * Always handle WMM once after association regardless 4302 * of the first value the AP uses. Setting -1 here has 4303 * that effect because the AP values is an unsigned 4304 * 4-bit value. 4305 */ 4306 link->u.mgd.wmm_last_param_set = -1; 4307 link->u.mgd.mu_edca_last_param_set = -1; 4308 4309 if (link->u.mgd.disable_wmm_tracking) { 4310 ieee80211_set_wmm_default(link, false, false); 4311 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4312 elems->wmm_param_len, 4313 elems->mu_edca_param_set)) { 4314 /* still enable QoS since we might have HT/VHT */ 4315 ieee80211_set_wmm_default(link, false, true); 4316 /* disable WMM tracking in this case to disable 4317 * tracking WMM parameter changes in the beacon if 4318 * the parameters weren't actually valid. Doing so 4319 * avoids changing parameters very strangely when 4320 * the AP is going back and forth between valid and 4321 * invalid parameters. 4322 */ 4323 link->u.mgd.disable_wmm_tracking = true; 4324 } 4325 4326 if (elems->max_idle_period_ie) { 4327 bss_conf->max_idle_period = 4328 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4329 bss_conf->protected_keep_alive = 4330 !!(elems->max_idle_period_ie->idle_options & 4331 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4332 *changed |= BSS_CHANGED_KEEP_ALIVE; 4333 } else { 4334 bss_conf->max_idle_period = 0; 4335 bss_conf->protected_keep_alive = false; 4336 } 4337 4338 /* set assoc capability (AID was already set earlier), 4339 * ieee80211_set_associated() will tell the driver */ 4340 bss_conf->assoc_capability = capab_info; 4341 4342 ret = true; 4343 out: 4344 kfree(elems); 4345 kfree(bss_ies); 4346 return ret; 4347 } 4348 4349 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4350 struct sta_info *sta, 4351 struct link_sta_info *link_sta, 4352 struct cfg80211_bss *cbss) 4353 { 4354 struct ieee80211_sub_if_data *sdata = link->sdata; 4355 struct ieee80211_local *local = sdata->local; 4356 struct ieee80211_bss *bss = (void *)cbss->priv; 4357 u32 rates = 0, basic_rates = 0; 4358 bool have_higher_than_11mbit = false; 4359 int min_rate = INT_MAX, min_rate_index = -1; 4360 /* this is clearly wrong for MLO but we'll just remove it later */ 4361 int shift = ieee80211_vif_get_shift(&sdata->vif); 4362 struct ieee80211_supported_band *sband; 4363 4364 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4365 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4366 4367 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4368 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4369 ieee80211_s1g_sta_rate_init(sta); 4370 return 0; 4371 } 4372 4373 sband = local->hw.wiphy->bands[cbss->channel->band]; 4374 4375 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4376 &rates, &basic_rates, &have_higher_than_11mbit, 4377 &min_rate, &min_rate_index, shift); 4378 4379 /* 4380 * This used to be a workaround for basic rates missing 4381 * in the association response frame. Now that we no 4382 * longer use the basic rates from there, it probably 4383 * doesn't happen any more, but keep the workaround so 4384 * in case some *other* APs are buggy in different ways 4385 * we can connect -- with a warning. 4386 * Allow this workaround only in case the AP provided at least 4387 * one rate. 4388 */ 4389 if (min_rate_index < 0) { 4390 link_info(link, "No legacy rates in association response\n"); 4391 return -EINVAL; 4392 } else if (!basic_rates) { 4393 link_info(link, "No basic rates, using min rate instead\n"); 4394 basic_rates = BIT(min_rate_index); 4395 } 4396 4397 if (rates) 4398 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4399 else 4400 link_info(link, "No rates found, keeping mandatory only\n"); 4401 4402 link->conf->basic_rates = basic_rates; 4403 4404 /* cf. IEEE 802.11 9.2.12 */ 4405 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4406 have_higher_than_11mbit; 4407 4408 return 0; 4409 } 4410 4411 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4412 struct cfg80211_bss *cbss) 4413 { 4414 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4415 const struct element *ht_cap_elem, *vht_cap_elem; 4416 const struct cfg80211_bss_ies *ies; 4417 const struct ieee80211_ht_cap *ht_cap; 4418 const struct ieee80211_vht_cap *vht_cap; 4419 const struct ieee80211_he_cap_elem *he_cap; 4420 const struct element *he_cap_elem; 4421 u16 mcs_80_map, mcs_160_map; 4422 int i, mcs_nss_size; 4423 bool support_160; 4424 u8 chains = 1; 4425 4426 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4427 return chains; 4428 4429 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4430 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4431 ht_cap = (void *)ht_cap_elem->data; 4432 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4433 /* 4434 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4435 * "Tx Unequal Modulation Supported" fields. 4436 */ 4437 } 4438 4439 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4440 return chains; 4441 4442 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4443 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4444 u8 nss; 4445 u16 tx_mcs_map; 4446 4447 vht_cap = (void *)vht_cap_elem->data; 4448 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4449 for (nss = 8; nss > 0; nss--) { 4450 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4451 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4452 break; 4453 } 4454 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4455 chains = max(chains, nss); 4456 } 4457 4458 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4459 return chains; 4460 4461 ies = rcu_dereference(cbss->ies); 4462 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4463 ies->data, ies->len); 4464 4465 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4466 return chains; 4467 4468 /* skip one byte ext_tag_id */ 4469 he_cap = (void *)(he_cap_elem->data + 1); 4470 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4471 4472 /* invalid HE IE */ 4473 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4474 return chains; 4475 4476 /* mcs_nss is right after he_cap info */ 4477 he_mcs_nss_supp = (void *)(he_cap + 1); 4478 4479 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4480 4481 for (i = 7; i >= 0; i--) { 4482 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4483 4484 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4485 chains = max_t(u8, chains, i + 1); 4486 break; 4487 } 4488 } 4489 4490 support_160 = he_cap->phy_cap_info[0] & 4491 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4492 4493 if (!support_160) 4494 return chains; 4495 4496 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4497 for (i = 7; i >= 0; i--) { 4498 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4499 4500 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4501 chains = max_t(u8, chains, i + 1); 4502 break; 4503 } 4504 } 4505 4506 return chains; 4507 } 4508 4509 static bool 4510 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4511 const struct cfg80211_bss_ies *ies, 4512 const struct ieee80211_he_operation *he_op) 4513 { 4514 const struct element *he_cap_elem; 4515 const struct ieee80211_he_cap_elem *he_cap; 4516 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4517 u16 mcs_80_map_tx, mcs_80_map_rx; 4518 u16 ap_min_req_set; 4519 int mcs_nss_size; 4520 int nss; 4521 4522 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4523 ies->data, ies->len); 4524 4525 if (!he_cap_elem) 4526 return false; 4527 4528 /* invalid HE IE */ 4529 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4530 sdata_info(sdata, 4531 "Invalid HE elem, Disable HE\n"); 4532 return false; 4533 } 4534 4535 /* skip one byte ext_tag_id */ 4536 he_cap = (void *)(he_cap_elem->data + 1); 4537 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4538 4539 /* invalid HE IE */ 4540 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4541 sdata_info(sdata, 4542 "Invalid HE elem with nss size, Disable HE\n"); 4543 return false; 4544 } 4545 4546 /* mcs_nss is right after he_cap info */ 4547 he_mcs_nss_supp = (void *)(he_cap + 1); 4548 4549 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4550 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4551 4552 /* P802.11-REVme/D0.3 4553 * 27.1.1 Introduction to the HE PHY 4554 * ... 4555 * An HE STA shall support the following features: 4556 * ... 4557 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4558 * supported channel widths for HE SU PPDUs 4559 */ 4560 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4561 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4562 sdata_info(sdata, 4563 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4564 mcs_80_map_tx, mcs_80_map_rx); 4565 return false; 4566 } 4567 4568 if (!he_op) 4569 return true; 4570 4571 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4572 4573 /* 4574 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4575 * zeroes, which is nonsense, and completely inconsistent with itself 4576 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4577 */ 4578 if (!ap_min_req_set) 4579 return true; 4580 4581 /* make sure the AP is consistent with itself 4582 * 4583 * P802.11-REVme/D0.3 4584 * 26.17.1 Basic HE BSS operation 4585 * 4586 * A STA that is operating in an HE BSS shall be able to receive and 4587 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4588 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4589 * MLME-START.request primitive and shall be able to receive at each of 4590 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4591 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4592 * primitive 4593 */ 4594 for (nss = 8; nss > 0; nss--) { 4595 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4596 u8 ap_rx_val; 4597 u8 ap_tx_val; 4598 4599 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4600 continue; 4601 4602 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4603 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4604 4605 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4606 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4607 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4608 sdata_info(sdata, 4609 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4610 nss, ap_rx_val, ap_rx_val, ap_op_val); 4611 return false; 4612 } 4613 } 4614 4615 return true; 4616 } 4617 4618 static bool 4619 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4620 struct ieee80211_supported_band *sband, 4621 const struct ieee80211_he_operation *he_op) 4622 { 4623 const struct ieee80211_sta_he_cap *sta_he_cap = 4624 ieee80211_get_he_iftype_cap(sband, 4625 ieee80211_vif_type_p2p(&sdata->vif)); 4626 u16 ap_min_req_set; 4627 int i; 4628 4629 if (!sta_he_cap || !he_op) 4630 return false; 4631 4632 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4633 4634 /* 4635 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4636 * zeroes, which is nonsense, and completely inconsistent with itself 4637 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4638 */ 4639 if (!ap_min_req_set) 4640 return true; 4641 4642 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4643 for (i = 0; i < 3; i++) { 4644 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4645 &sta_he_cap->he_mcs_nss_supp; 4646 u16 sta_mcs_map_rx = 4647 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4648 u16 sta_mcs_map_tx = 4649 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4650 u8 nss; 4651 bool verified = true; 4652 4653 /* 4654 * For each band there is a maximum of 8 spatial streams 4655 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4656 * of 2 bits per NSS (1-8), with the values defined in enum 4657 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4658 * capabilities aren't less than the AP's minimum requirements 4659 * for this HE BSS per SS. 4660 * It is enough to find one such band that meets the reqs. 4661 */ 4662 for (nss = 8; nss > 0; nss--) { 4663 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4664 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4665 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4666 4667 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4668 continue; 4669 4670 /* 4671 * Make sure the HE AP doesn't require MCSs that aren't 4672 * supported by the client as required by spec 4673 * 4674 * P802.11-REVme/D0.3 4675 * 26.17.1 Basic HE BSS operation 4676 * 4677 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4678 * a BSS, unless it supports (i.e., is able to both transmit and 4679 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4680 * HE-MCS and NSS set. 4681 */ 4682 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4683 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4684 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4685 verified = false; 4686 break; 4687 } 4688 } 4689 4690 if (verified) 4691 return true; 4692 } 4693 4694 /* If here, STA doesn't meet AP's HE min requirements */ 4695 return false; 4696 } 4697 4698 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4699 struct ieee80211_link_data *link, 4700 struct cfg80211_bss *cbss, 4701 ieee80211_conn_flags_t *conn_flags) 4702 { 4703 struct ieee80211_local *local = sdata->local; 4704 const struct ieee80211_ht_cap *ht_cap = NULL; 4705 const struct ieee80211_ht_operation *ht_oper = NULL; 4706 const struct ieee80211_vht_operation *vht_oper = NULL; 4707 const struct ieee80211_he_operation *he_oper = NULL; 4708 const struct ieee80211_eht_operation *eht_oper = NULL; 4709 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4710 struct ieee80211_supported_band *sband; 4711 struct cfg80211_chan_def chandef; 4712 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4713 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4714 struct ieee80211_bss *bss = (void *)cbss->priv; 4715 struct ieee80211_elems_parse_params parse_params = { 4716 .bss = cbss, 4717 .link_id = -1, 4718 .from_ap = true, 4719 }; 4720 struct ieee802_11_elems *elems; 4721 const struct cfg80211_bss_ies *ies; 4722 int ret; 4723 u32 i; 4724 bool have_80mhz; 4725 4726 rcu_read_lock(); 4727 4728 ies = rcu_dereference(cbss->ies); 4729 parse_params.start = ies->data; 4730 parse_params.len = ies->len; 4731 elems = ieee802_11_parse_elems_full(&parse_params); 4732 if (!elems) { 4733 rcu_read_unlock(); 4734 return -ENOMEM; 4735 } 4736 4737 sband = local->hw.wiphy->bands[cbss->channel->band]; 4738 4739 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4740 IEEE80211_CONN_DISABLE_80P80MHZ | 4741 IEEE80211_CONN_DISABLE_160MHZ); 4742 4743 /* disable HT/VHT/HE if we don't support them */ 4744 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4745 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4746 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4747 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4748 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4749 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4750 } 4751 4752 if (!sband->vht_cap.vht_supported && is_5ghz) { 4753 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4754 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4755 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4756 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4757 } 4758 4759 if (!ieee80211_get_he_iftype_cap(sband, 4760 ieee80211_vif_type_p2p(&sdata->vif))) { 4761 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4762 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4763 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4764 } 4765 4766 if (!ieee80211_get_eht_iftype_cap(sband, 4767 ieee80211_vif_type_p2p(&sdata->vif))) { 4768 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4769 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4770 } 4771 4772 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4773 ht_oper = elems->ht_operation; 4774 ht_cap = elems->ht_cap_elem; 4775 4776 if (!ht_cap) { 4777 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4778 ht_oper = NULL; 4779 } 4780 } 4781 4782 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4783 vht_oper = elems->vht_operation; 4784 if (vht_oper && !ht_oper) { 4785 vht_oper = NULL; 4786 sdata_info(sdata, 4787 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4788 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4789 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4790 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4791 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4792 } 4793 4794 if (!elems->vht_cap_elem) { 4795 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4796 vht_oper = NULL; 4797 } 4798 } 4799 4800 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4801 he_oper = elems->he_operation; 4802 4803 if (link && is_6ghz) { 4804 struct ieee80211_bss_conf *bss_conf; 4805 u8 j = 0; 4806 4807 bss_conf = link->conf; 4808 4809 if (elems->pwr_constr_elem) 4810 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4811 4812 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4813 ARRAY_SIZE(elems->tx_pwr_env)); 4814 4815 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4816 if (elems->tx_pwr_env_len[i] > 4817 sizeof(bss_conf->tx_pwr_env[j])) 4818 continue; 4819 4820 bss_conf->tx_pwr_env_num++; 4821 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4822 elems->tx_pwr_env_len[i]); 4823 j++; 4824 } 4825 } 4826 4827 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4828 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4829 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4830 IEEE80211_CONN_DISABLE_EHT; 4831 } 4832 4833 /* 4834 * EHT requires HE to be supported as well. Specifically for 6 GHz 4835 * channels, the operation channel information can only be deduced from 4836 * both the 6 GHz operation information (from the HE operation IE) and 4837 * EHT operation. 4838 */ 4839 if (!(*conn_flags & 4840 (IEEE80211_CONN_DISABLE_HE | 4841 IEEE80211_CONN_DISABLE_EHT)) && 4842 he_oper) { 4843 const struct cfg80211_bss_ies *cbss_ies; 4844 const struct element *eht_ml_elem; 4845 const u8 *eht_oper_ie; 4846 4847 cbss_ies = rcu_dereference(cbss->ies); 4848 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4849 cbss_ies->data, cbss_ies->len); 4850 if (eht_oper_ie && eht_oper_ie[1] >= 4851 1 + sizeof(struct ieee80211_eht_operation)) 4852 eht_oper = (void *)(eht_oper_ie + 3); 4853 else 4854 eht_oper = NULL; 4855 4856 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4857 cbss_ies->data, cbss_ies->len); 4858 4859 /* data + 1 / datalen - 1 since it's an extended element */ 4860 if (eht_ml_elem && 4861 ieee80211_mle_size_ok(eht_ml_elem->data + 1, 4862 eht_ml_elem->datalen - 1)) { 4863 sdata->vif.cfg.eml_cap = 4864 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4865 sdata->vif.cfg.eml_med_sync_delay = 4866 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4867 } 4868 } 4869 4870 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4871 have_80mhz = false; 4872 for (i = 0; i < sband->n_channels; i++) { 4873 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4874 IEEE80211_CHAN_NO_80MHZ)) 4875 continue; 4876 4877 have_80mhz = true; 4878 break; 4879 } 4880 4881 if (!have_80mhz) { 4882 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4883 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4884 } 4885 4886 if (sband->band == NL80211_BAND_S1GHZ) { 4887 s1g_oper = elems->s1g_oper; 4888 if (!s1g_oper) 4889 sdata_info(sdata, 4890 "AP missing S1G operation element?\n"); 4891 } 4892 4893 *conn_flags |= 4894 ieee80211_determine_chantype(sdata, link, *conn_flags, 4895 sband, 4896 cbss->channel, 4897 bss->vht_cap_info, 4898 ht_oper, vht_oper, 4899 he_oper, eht_oper, 4900 s1g_oper, 4901 &chandef, false); 4902 4903 if (link) 4904 link->needed_rx_chains = 4905 min(ieee80211_max_rx_chains(link, cbss), 4906 local->rx_chains); 4907 4908 rcu_read_unlock(); 4909 /* the element data was RCU protected so no longer valid anyway */ 4910 kfree(elems); 4911 elems = NULL; 4912 4913 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4914 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4915 return -EINVAL; 4916 } 4917 4918 if (!link) 4919 return 0; 4920 4921 /* will change later if needed */ 4922 link->smps_mode = IEEE80211_SMPS_OFF; 4923 4924 mutex_lock(&local->mtx); 4925 /* 4926 * If this fails (possibly due to channel context sharing 4927 * on incompatible channels, e.g. 80+80 and 160 sharing the 4928 * same control channel) try to use a smaller bandwidth. 4929 */ 4930 ret = ieee80211_link_use_channel(link, &chandef, 4931 IEEE80211_CHANCTX_SHARED); 4932 4933 /* don't downgrade for 5 and 10 MHz channels, though. */ 4934 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4935 chandef.width == NL80211_CHAN_WIDTH_10) 4936 goto out; 4937 4938 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4939 *conn_flags |= 4940 ieee80211_chandef_downgrade(&chandef); 4941 ret = ieee80211_link_use_channel(link, &chandef, 4942 IEEE80211_CHANCTX_SHARED); 4943 } 4944 out: 4945 mutex_unlock(&local->mtx); 4946 return ret; 4947 } 4948 4949 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4950 u8 *dtim_count, u8 *dtim_period) 4951 { 4952 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4953 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4954 ies->len); 4955 const struct ieee80211_tim_ie *tim = NULL; 4956 const struct ieee80211_bssid_index *idx; 4957 bool valid = tim_ie && tim_ie[1] >= 2; 4958 4959 if (valid) 4960 tim = (void *)(tim_ie + 2); 4961 4962 if (dtim_count) 4963 *dtim_count = valid ? tim->dtim_count : 0; 4964 4965 if (dtim_period) 4966 *dtim_period = valid ? tim->dtim_period : 0; 4967 4968 /* Check if value is overridden by non-transmitted profile */ 4969 if (!idx_ie || idx_ie[1] < 3) 4970 return valid; 4971 4972 idx = (void *)(idx_ie + 2); 4973 4974 if (dtim_count) 4975 *dtim_count = idx->dtim_count; 4976 4977 if (dtim_period) 4978 *dtim_period = idx->dtim_period; 4979 4980 return true; 4981 } 4982 4983 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4984 struct ieee80211_mgmt *mgmt, 4985 struct ieee802_11_elems *elems, 4986 const u8 *elem_start, unsigned int elem_len) 4987 { 4988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4989 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4990 struct ieee80211_local *local = sdata->local; 4991 unsigned int link_id; 4992 struct sta_info *sta; 4993 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4994 u16 valid_links = 0; 4995 int err; 4996 4997 mutex_lock(&sdata->local->sta_mtx); 4998 /* 4999 * station info was already allocated and inserted before 5000 * the association and should be available to us 5001 */ 5002 sta = sta_info_get(sdata, assoc_data->ap_addr); 5003 if (WARN_ON(!sta)) 5004 goto out_err; 5005 5006 if (sdata->vif.valid_links) { 5007 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5008 if (!assoc_data->link[link_id].bss) 5009 continue; 5010 valid_links |= BIT(link_id); 5011 5012 if (link_id != assoc_data->assoc_link_id) { 5013 err = ieee80211_sta_allocate_link(sta, link_id); 5014 if (err) 5015 goto out_err; 5016 } 5017 } 5018 5019 ieee80211_vif_set_links(sdata, valid_links); 5020 } 5021 5022 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5023 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5024 struct ieee80211_link_data *link; 5025 struct link_sta_info *link_sta; 5026 5027 if (!cbss) 5028 continue; 5029 5030 link = sdata_dereference(sdata->link[link_id], sdata); 5031 if (WARN_ON(!link)) 5032 goto out_err; 5033 5034 if (sdata->vif.valid_links) 5035 link_info(link, 5036 "local address %pM, AP link address %pM%s\n", 5037 link->conf->addr, 5038 assoc_data->link[link_id].bss->bssid, 5039 link_id == assoc_data->assoc_link_id ? 5040 " (assoc)" : ""); 5041 5042 link_sta = rcu_dereference_protected(sta->link[link_id], 5043 lockdep_is_held(&local->sta_mtx)); 5044 if (WARN_ON(!link_sta)) 5045 goto out_err; 5046 5047 if (!link->u.mgd.have_beacon) { 5048 const struct cfg80211_bss_ies *ies; 5049 5050 rcu_read_lock(); 5051 ies = rcu_dereference(cbss->beacon_ies); 5052 if (ies) 5053 link->u.mgd.have_beacon = true; 5054 else 5055 ies = rcu_dereference(cbss->ies); 5056 ieee80211_get_dtim(ies, 5057 &link->conf->sync_dtim_count, 5058 &link->u.mgd.dtim_period); 5059 link->conf->beacon_int = cbss->beacon_interval; 5060 rcu_read_unlock(); 5061 } 5062 5063 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5064 5065 if (link_id != assoc_data->assoc_link_id) { 5066 err = ieee80211_prep_channel(sdata, link, cbss, 5067 &link->u.mgd.conn_flags); 5068 if (err) { 5069 link_info(link, "prep_channel failed\n"); 5070 goto out_err; 5071 } 5072 } 5073 5074 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5075 assoc_data->link[link_id].bss); 5076 if (err) 5077 goto out_err; 5078 5079 if (!ieee80211_assoc_config_link(link, link_sta, 5080 assoc_data->link[link_id].bss, 5081 mgmt, elem_start, elem_len, 5082 &changed[link_id])) 5083 goto out_err; 5084 5085 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5086 valid_links &= ~BIT(link_id); 5087 ieee80211_sta_remove_link(sta, link_id); 5088 continue; 5089 } 5090 5091 if (link_id != assoc_data->assoc_link_id) { 5092 err = ieee80211_sta_activate_link(sta, link_id); 5093 if (err) 5094 goto out_err; 5095 } 5096 } 5097 5098 /* links might have changed due to rejected ones, set them again */ 5099 ieee80211_vif_set_links(sdata, valid_links); 5100 5101 rate_control_rate_init(sta); 5102 5103 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5104 set_sta_flag(sta, WLAN_STA_MFP); 5105 sta->sta.mfp = true; 5106 } else { 5107 sta->sta.mfp = false; 5108 } 5109 5110 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5111 elems->ext_capab_len); 5112 5113 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5114 local->hw.queues >= IEEE80211_NUM_ACS; 5115 5116 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5117 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5118 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5119 if (err) { 5120 sdata_info(sdata, 5121 "failed to move station %pM to desired state\n", 5122 sta->sta.addr); 5123 WARN_ON(__sta_info_destroy(sta)); 5124 goto out_err; 5125 } 5126 5127 if (sdata->wdev.use_4addr) 5128 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5129 5130 mutex_unlock(&sdata->local->sta_mtx); 5131 5132 ieee80211_set_associated(sdata, assoc_data, changed); 5133 5134 /* 5135 * If we're using 4-addr mode, let the AP know that we're 5136 * doing so, so that it can create the STA VLAN on its side 5137 */ 5138 if (ifmgd->use_4addr) 5139 ieee80211_send_4addr_nullfunc(local, sdata); 5140 5141 /* 5142 * Start timer to probe the connection to the AP now. 5143 * Also start the timer that will detect beacon loss. 5144 */ 5145 ieee80211_sta_reset_beacon_monitor(sdata); 5146 ieee80211_sta_reset_conn_monitor(sdata); 5147 5148 return true; 5149 out_err: 5150 eth_zero_addr(sdata->vif.cfg.ap_addr); 5151 mutex_unlock(&sdata->local->sta_mtx); 5152 return false; 5153 } 5154 5155 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5156 struct ieee80211_mgmt *mgmt, 5157 size_t len) 5158 { 5159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5160 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5161 u16 capab_info, status_code, aid; 5162 struct ieee80211_elems_parse_params parse_params = { 5163 .bss = NULL, 5164 .link_id = -1, 5165 .from_ap = true, 5166 }; 5167 struct ieee802_11_elems *elems; 5168 int ac; 5169 const u8 *elem_start; 5170 unsigned int elem_len; 5171 bool reassoc; 5172 struct ieee80211_event event = { 5173 .type = MLME_EVENT, 5174 .u.mlme.data = ASSOC_EVENT, 5175 }; 5176 struct ieee80211_prep_tx_info info = {}; 5177 struct cfg80211_rx_assoc_resp resp = { 5178 .uapsd_queues = -1, 5179 }; 5180 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5181 unsigned int link_id; 5182 5183 sdata_assert_lock(sdata); 5184 5185 if (!assoc_data) 5186 return; 5187 5188 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5189 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5190 return; 5191 5192 /* 5193 * AssocResp and ReassocResp have identical structure, so process both 5194 * of them in this function. 5195 */ 5196 5197 if (len < 24 + 6) 5198 return; 5199 5200 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5201 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5202 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5203 if (assoc_data->s1g) 5204 elem_start = mgmt->u.s1g_assoc_resp.variable; 5205 else 5206 elem_start = mgmt->u.assoc_resp.variable; 5207 5208 /* 5209 * Note: this may not be perfect, AP might misbehave - if 5210 * anyone needs to rely on perfect complete notification 5211 * with the exact right subtype, then we need to track what 5212 * we actually transmitted. 5213 */ 5214 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5215 IEEE80211_STYPE_ASSOC_REQ; 5216 5217 if (assoc_data->fils_kek_len && 5218 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5219 return; 5220 5221 elem_len = len - (elem_start - (u8 *)mgmt); 5222 parse_params.start = elem_start; 5223 parse_params.len = elem_len; 5224 elems = ieee802_11_parse_elems_full(&parse_params); 5225 if (!elems) 5226 goto notify_driver; 5227 5228 if (elems->aid_resp) 5229 aid = le16_to_cpu(elems->aid_resp->aid); 5230 else if (assoc_data->s1g) 5231 aid = 0; /* TODO */ 5232 else 5233 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5234 5235 /* 5236 * The 5 MSB of the AID field are reserved 5237 * (802.11-2016 9.4.1.8 AID field) 5238 */ 5239 aid &= 0x7ff; 5240 5241 sdata_info(sdata, 5242 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5243 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5244 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5245 5246 ifmgd->broken_ap = false; 5247 5248 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5249 elems->timeout_int && 5250 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5251 u32 tu, ms; 5252 5253 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5254 le32_to_cpu(elems->timeout_int->value)); 5255 5256 tu = le32_to_cpu(elems->timeout_int->value); 5257 ms = tu * 1024 / 1000; 5258 sdata_info(sdata, 5259 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5260 assoc_data->ap_addr, tu, ms); 5261 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5262 assoc_data->timeout_started = true; 5263 if (ms > IEEE80211_ASSOC_TIMEOUT) 5264 run_again(sdata, assoc_data->timeout); 5265 goto notify_driver; 5266 } 5267 5268 if (status_code != WLAN_STATUS_SUCCESS) { 5269 sdata_info(sdata, "%pM denied association (code=%d)\n", 5270 assoc_data->ap_addr, status_code); 5271 event.u.mlme.status = MLME_DENIED; 5272 event.u.mlme.reason = status_code; 5273 drv_event_callback(sdata->local, sdata, &event); 5274 } else { 5275 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5276 sdata_info(sdata, 5277 "invalid AID value %d (out of range), turn off PS\n", 5278 aid); 5279 aid = 0; 5280 ifmgd->broken_ap = true; 5281 } 5282 5283 if (sdata->vif.valid_links) { 5284 if (!elems->multi_link) { 5285 sdata_info(sdata, 5286 "MLO association with %pM but no multi-link element in response!\n", 5287 assoc_data->ap_addr); 5288 goto abandon_assoc; 5289 } 5290 5291 if (le16_get_bits(elems->multi_link->control, 5292 IEEE80211_ML_CONTROL_TYPE) != 5293 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5294 sdata_info(sdata, 5295 "bad multi-link element (control=0x%x)\n", 5296 le16_to_cpu(elems->multi_link->control)); 5297 goto abandon_assoc; 5298 } else { 5299 struct ieee80211_mle_basic_common_info *common; 5300 5301 common = (void *)elems->multi_link->variable; 5302 5303 if (memcmp(assoc_data->ap_addr, 5304 common->mld_mac_addr, ETH_ALEN)) { 5305 sdata_info(sdata, 5306 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5307 common->mld_mac_addr, 5308 assoc_data->ap_addr); 5309 goto abandon_assoc; 5310 } 5311 } 5312 } 5313 5314 sdata->vif.cfg.aid = aid; 5315 5316 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5317 elem_start, elem_len)) { 5318 /* oops -- internal error -- send timeout for now */ 5319 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5320 goto notify_driver; 5321 } 5322 event.u.mlme.status = MLME_SUCCESS; 5323 drv_event_callback(sdata->local, sdata, &event); 5324 sdata_info(sdata, "associated\n"); 5325 5326 info.success = 1; 5327 } 5328 5329 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5330 struct ieee80211_link_data *link; 5331 5332 link = sdata_dereference(sdata->link[link_id], sdata); 5333 if (!link) 5334 continue; 5335 5336 if (!assoc_data->link[link_id].bss) 5337 continue; 5338 5339 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5340 resp.links[link_id].addr = link->conf->addr; 5341 resp.links[link_id].status = assoc_data->link[link_id].status; 5342 5343 /* get uapsd queues configuration - same for all links */ 5344 resp.uapsd_queues = 0; 5345 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5346 if (link->tx_conf[ac].uapsd) 5347 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5348 } 5349 5350 if (sdata->vif.valid_links) { 5351 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5352 resp.ap_mld_addr = ap_mld_addr; 5353 } 5354 5355 ieee80211_destroy_assoc_data(sdata, 5356 status_code == WLAN_STATUS_SUCCESS ? 5357 ASSOC_SUCCESS : 5358 ASSOC_REJECTED); 5359 5360 resp.buf = (u8 *)mgmt; 5361 resp.len = len; 5362 resp.req_ies = ifmgd->assoc_req_ies; 5363 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5364 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5365 notify_driver: 5366 drv_mgd_complete_tx(sdata->local, sdata, &info); 5367 kfree(elems); 5368 return; 5369 abandon_assoc: 5370 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5371 goto notify_driver; 5372 } 5373 5374 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5375 struct ieee80211_mgmt *mgmt, size_t len, 5376 struct ieee80211_rx_status *rx_status) 5377 { 5378 struct ieee80211_sub_if_data *sdata = link->sdata; 5379 struct ieee80211_local *local = sdata->local; 5380 struct ieee80211_bss *bss; 5381 struct ieee80211_channel *channel; 5382 5383 sdata_assert_lock(sdata); 5384 5385 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5386 ieee80211_rx_status_to_khz(rx_status)); 5387 if (!channel) 5388 return; 5389 5390 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5391 if (bss) { 5392 link->conf->beacon_rate = bss->beacon_rate; 5393 ieee80211_rx_bss_put(local, bss); 5394 } 5395 } 5396 5397 5398 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5399 struct sk_buff *skb) 5400 { 5401 struct ieee80211_sub_if_data *sdata = link->sdata; 5402 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5403 struct ieee80211_if_managed *ifmgd; 5404 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5405 struct ieee80211_channel *channel; 5406 size_t baselen, len = skb->len; 5407 5408 ifmgd = &sdata->u.mgd; 5409 5410 sdata_assert_lock(sdata); 5411 5412 /* 5413 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5414 * "If a 6 GHz AP receives a Probe Request frame and responds with 5415 * a Probe Response frame [..], the Address 1 field of the Probe 5416 * Response frame shall be set to the broadcast address [..]" 5417 * So, on 6GHz band we should also accept broadcast responses. 5418 */ 5419 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5420 rx_status->freq); 5421 if (!channel) 5422 return; 5423 5424 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5425 (channel->band != NL80211_BAND_6GHZ || 5426 !is_broadcast_ether_addr(mgmt->da))) 5427 return; /* ignore ProbeResp to foreign address */ 5428 5429 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5430 if (baselen > len) 5431 return; 5432 5433 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5434 5435 if (ifmgd->associated && 5436 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5437 ieee80211_reset_ap_probe(sdata); 5438 } 5439 5440 /* 5441 * This is the canonical list of information elements we care about, 5442 * the filter code also gives us all changes to the Microsoft OUI 5443 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5444 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5445 * changes to requested client power. 5446 * 5447 * We implement beacon filtering in software since that means we can 5448 * avoid processing the frame here and in cfg80211, and userspace 5449 * will not be able to tell whether the hardware supports it or not. 5450 * 5451 * XXX: This list needs to be dynamic -- userspace needs to be able to 5452 * add items it requires. It also needs to be able to tell us to 5453 * look out for other vendor IEs. 5454 */ 5455 static const u64 care_about_ies = 5456 (1ULL << WLAN_EID_COUNTRY) | 5457 (1ULL << WLAN_EID_ERP_INFO) | 5458 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5459 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5460 (1ULL << WLAN_EID_HT_CAPABILITY) | 5461 (1ULL << WLAN_EID_HT_OPERATION) | 5462 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5463 5464 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5465 struct ieee80211_if_managed *ifmgd, 5466 struct ieee80211_bss_conf *bss_conf, 5467 struct ieee80211_local *local, 5468 struct ieee80211_rx_status *rx_status) 5469 { 5470 struct ieee80211_sub_if_data *sdata = link->sdata; 5471 5472 /* Track average RSSI from the Beacon frames of the current AP */ 5473 5474 if (!link->u.mgd.tracking_signal_avg) { 5475 link->u.mgd.tracking_signal_avg = true; 5476 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5477 link->u.mgd.last_cqm_event_signal = 0; 5478 link->u.mgd.count_beacon_signal = 1; 5479 link->u.mgd.last_ave_beacon_signal = 0; 5480 } else { 5481 link->u.mgd.count_beacon_signal++; 5482 } 5483 5484 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5485 -rx_status->signal); 5486 5487 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5488 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5489 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5490 int last_sig = link->u.mgd.last_ave_beacon_signal; 5491 struct ieee80211_event event = { 5492 .type = RSSI_EVENT, 5493 }; 5494 5495 /* 5496 * if signal crosses either of the boundaries, invoke callback 5497 * with appropriate parameters 5498 */ 5499 if (sig > ifmgd->rssi_max_thold && 5500 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5501 link->u.mgd.last_ave_beacon_signal = sig; 5502 event.u.rssi.data = RSSI_EVENT_HIGH; 5503 drv_event_callback(local, sdata, &event); 5504 } else if (sig < ifmgd->rssi_min_thold && 5505 (last_sig >= ifmgd->rssi_max_thold || 5506 last_sig == 0)) { 5507 link->u.mgd.last_ave_beacon_signal = sig; 5508 event.u.rssi.data = RSSI_EVENT_LOW; 5509 drv_event_callback(local, sdata, &event); 5510 } 5511 } 5512 5513 if (bss_conf->cqm_rssi_thold && 5514 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5515 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5516 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5517 int last_event = link->u.mgd.last_cqm_event_signal; 5518 int thold = bss_conf->cqm_rssi_thold; 5519 int hyst = bss_conf->cqm_rssi_hyst; 5520 5521 if (sig < thold && 5522 (last_event == 0 || sig < last_event - hyst)) { 5523 link->u.mgd.last_cqm_event_signal = sig; 5524 ieee80211_cqm_rssi_notify( 5525 &sdata->vif, 5526 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5527 sig, GFP_KERNEL); 5528 } else if (sig > thold && 5529 (last_event == 0 || sig > last_event + hyst)) { 5530 link->u.mgd.last_cqm_event_signal = sig; 5531 ieee80211_cqm_rssi_notify( 5532 &sdata->vif, 5533 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5534 sig, GFP_KERNEL); 5535 } 5536 } 5537 5538 if (bss_conf->cqm_rssi_low && 5539 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5540 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5541 int last_event = link->u.mgd.last_cqm_event_signal; 5542 int low = bss_conf->cqm_rssi_low; 5543 int high = bss_conf->cqm_rssi_high; 5544 5545 if (sig < low && 5546 (last_event == 0 || last_event >= low)) { 5547 link->u.mgd.last_cqm_event_signal = sig; 5548 ieee80211_cqm_rssi_notify( 5549 &sdata->vif, 5550 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5551 sig, GFP_KERNEL); 5552 } else if (sig > high && 5553 (last_event == 0 || last_event <= high)) { 5554 link->u.mgd.last_cqm_event_signal = sig; 5555 ieee80211_cqm_rssi_notify( 5556 &sdata->vif, 5557 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5558 sig, GFP_KERNEL); 5559 } 5560 } 5561 } 5562 5563 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5564 struct cfg80211_bss *bss) 5565 { 5566 if (ether_addr_equal(tx_bssid, bss->bssid)) 5567 return true; 5568 if (!bss->transmitted_bss) 5569 return false; 5570 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5571 } 5572 5573 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5574 const struct ieee80211_eht_operation *eht_oper, 5575 u64 *changed) 5576 { 5577 u16 bitmap = 0, extracted; 5578 5579 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5580 (eht_oper->params & 5581 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5582 const struct ieee80211_eht_operation_info *info = 5583 (void *)eht_oper->optional; 5584 const u8 *disable_subchannel_bitmap = info->optional; 5585 5586 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5587 } 5588 5589 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5590 &link->conf->chandef, 5591 bitmap); 5592 5593 /* accept if there are no changes */ 5594 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5595 extracted == link->conf->eht_puncturing) 5596 return true; 5597 5598 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5599 &link->conf->chandef)) { 5600 link_info(link, 5601 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5602 link->u.mgd.bssid, 5603 bitmap, 5604 link->conf->chandef.width); 5605 return false; 5606 } 5607 5608 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5609 return true; 5610 } 5611 5612 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5613 struct ieee80211_hdr *hdr, size_t len, 5614 struct ieee80211_rx_status *rx_status) 5615 { 5616 struct ieee80211_sub_if_data *sdata = link->sdata; 5617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5618 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5619 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5620 struct ieee80211_mgmt *mgmt = (void *) hdr; 5621 size_t baselen; 5622 struct ieee802_11_elems *elems; 5623 struct ieee80211_local *local = sdata->local; 5624 struct ieee80211_chanctx_conf *chanctx_conf; 5625 struct ieee80211_supported_band *sband; 5626 struct ieee80211_channel *chan; 5627 struct link_sta_info *link_sta; 5628 struct sta_info *sta; 5629 u64 changed = 0; 5630 bool erp_valid; 5631 u8 erp_value = 0; 5632 u32 ncrc = 0; 5633 u8 *bssid, *variable = mgmt->u.beacon.variable; 5634 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5635 struct ieee80211_elems_parse_params parse_params = { 5636 .link_id = -1, 5637 .from_ap = true, 5638 }; 5639 5640 sdata_assert_lock(sdata); 5641 5642 /* Process beacon from the current BSS */ 5643 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5644 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5645 struct ieee80211_ext *ext = (void *) mgmt; 5646 5647 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5648 variable = ext->u.s1g_short_beacon.variable; 5649 else 5650 variable = ext->u.s1g_beacon.variable; 5651 } 5652 5653 baselen = (u8 *) variable - (u8 *) mgmt; 5654 if (baselen > len) 5655 return; 5656 5657 parse_params.start = variable; 5658 parse_params.len = len - baselen; 5659 5660 rcu_read_lock(); 5661 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5662 if (!chanctx_conf) { 5663 rcu_read_unlock(); 5664 return; 5665 } 5666 5667 if (ieee80211_rx_status_to_khz(rx_status) != 5668 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5669 rcu_read_unlock(); 5670 return; 5671 } 5672 chan = chanctx_conf->def.chan; 5673 rcu_read_unlock(); 5674 5675 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5676 !WARN_ON(sdata->vif.valid_links) && 5677 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5678 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5679 elems = ieee802_11_parse_elems_full(&parse_params); 5680 if (!elems) 5681 return; 5682 5683 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5684 5685 if (elems->dtim_period) 5686 link->u.mgd.dtim_period = elems->dtim_period; 5687 link->u.mgd.have_beacon = true; 5688 ifmgd->assoc_data->need_beacon = false; 5689 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5690 link->conf->sync_tsf = 5691 le64_to_cpu(mgmt->u.beacon.timestamp); 5692 link->conf->sync_device_ts = 5693 rx_status->device_timestamp; 5694 link->conf->sync_dtim_count = elems->dtim_count; 5695 } 5696 5697 if (elems->mbssid_config_ie) 5698 bss_conf->profile_periodicity = 5699 elems->mbssid_config_ie->profile_periodicity; 5700 else 5701 bss_conf->profile_periodicity = 0; 5702 5703 if (elems->ext_capab_len >= 11 && 5704 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5705 bss_conf->ema_ap = true; 5706 else 5707 bss_conf->ema_ap = false; 5708 5709 /* continue assoc process */ 5710 ifmgd->assoc_data->timeout = jiffies; 5711 ifmgd->assoc_data->timeout_started = true; 5712 run_again(sdata, ifmgd->assoc_data->timeout); 5713 kfree(elems); 5714 return; 5715 } 5716 5717 if (!ifmgd->associated || 5718 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5719 return; 5720 bssid = link->u.mgd.bssid; 5721 5722 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5723 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5724 local, rx_status); 5725 5726 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5727 mlme_dbg_ratelimited(sdata, 5728 "cancelling AP probe due to a received beacon\n"); 5729 ieee80211_reset_ap_probe(sdata); 5730 } 5731 5732 /* 5733 * Push the beacon loss detection into the future since 5734 * we are processing a beacon from the AP just now. 5735 */ 5736 ieee80211_sta_reset_beacon_monitor(sdata); 5737 5738 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5739 * element (which carries the beacon interval). Don't forget to add a 5740 * bit to care_about_ies[] above if mac80211 is interested in a 5741 * changing S1G element. 5742 */ 5743 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5744 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5745 parse_params.bss = link->u.mgd.bss; 5746 parse_params.filter = care_about_ies; 5747 parse_params.crc = ncrc; 5748 elems = ieee802_11_parse_elems_full(&parse_params); 5749 if (!elems) 5750 return; 5751 ncrc = elems->crc; 5752 5753 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5754 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5755 if (local->hw.conf.dynamic_ps_timeout > 0) { 5756 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5757 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5758 ieee80211_hw_config(local, 5759 IEEE80211_CONF_CHANGE_PS); 5760 } 5761 ieee80211_send_nullfunc(local, sdata, false); 5762 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5763 local->pspolling = true; 5764 5765 /* 5766 * Here is assumed that the driver will be 5767 * able to send ps-poll frame and receive a 5768 * response even though power save mode is 5769 * enabled, but some drivers might require 5770 * to disable power save here. This needs 5771 * to be investigated. 5772 */ 5773 ieee80211_send_pspoll(local, sdata); 5774 } 5775 } 5776 5777 if (sdata->vif.p2p || 5778 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5779 struct ieee80211_p2p_noa_attr noa = {}; 5780 int ret; 5781 5782 ret = cfg80211_get_p2p_attr(variable, 5783 len - baselen, 5784 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5785 (u8 *) &noa, sizeof(noa)); 5786 if (ret >= 2) { 5787 if (link->u.mgd.p2p_noa_index != noa.index) { 5788 /* valid noa_attr and index changed */ 5789 link->u.mgd.p2p_noa_index = noa.index; 5790 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5791 changed |= BSS_CHANGED_P2P_PS; 5792 /* 5793 * make sure we update all information, the CRC 5794 * mechanism doesn't look at P2P attributes. 5795 */ 5796 link->u.mgd.beacon_crc_valid = false; 5797 } 5798 } else if (link->u.mgd.p2p_noa_index != -1) { 5799 /* noa_attr not found and we had valid noa_attr before */ 5800 link->u.mgd.p2p_noa_index = -1; 5801 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5802 changed |= BSS_CHANGED_P2P_PS; 5803 link->u.mgd.beacon_crc_valid = false; 5804 } 5805 } 5806 5807 if (link->u.mgd.csa_waiting_bcn) 5808 ieee80211_chswitch_post_beacon(link); 5809 5810 /* 5811 * Update beacon timing and dtim count on every beacon appearance. This 5812 * will allow the driver to use the most updated values. Do it before 5813 * comparing this one with last received beacon. 5814 * IMPORTANT: These parameters would possibly be out of sync by the time 5815 * the driver will use them. The synchronized view is currently 5816 * guaranteed only in certain callbacks. 5817 */ 5818 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5819 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5820 link->conf->sync_tsf = 5821 le64_to_cpu(mgmt->u.beacon.timestamp); 5822 link->conf->sync_device_ts = 5823 rx_status->device_timestamp; 5824 link->conf->sync_dtim_count = elems->dtim_count; 5825 } 5826 5827 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5828 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5829 goto free; 5830 link->u.mgd.beacon_crc = ncrc; 5831 link->u.mgd.beacon_crc_valid = true; 5832 5833 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5834 5835 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5836 rx_status->device_timestamp, 5837 elems, true); 5838 5839 if (!link->u.mgd.disable_wmm_tracking && 5840 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5841 elems->wmm_param_len, 5842 elems->mu_edca_param_set)) 5843 changed |= BSS_CHANGED_QOS; 5844 5845 /* 5846 * If we haven't had a beacon before, tell the driver about the 5847 * DTIM period (and beacon timing if desired) now. 5848 */ 5849 if (!link->u.mgd.have_beacon) { 5850 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5851 bss_conf->dtim_period = elems->dtim_period ?: 1; 5852 5853 changed |= BSS_CHANGED_BEACON_INFO; 5854 link->u.mgd.have_beacon = true; 5855 5856 mutex_lock(&local->iflist_mtx); 5857 ieee80211_recalc_ps(local); 5858 mutex_unlock(&local->iflist_mtx); 5859 5860 ieee80211_recalc_ps_vif(sdata); 5861 } 5862 5863 if (elems->erp_info) { 5864 erp_valid = true; 5865 erp_value = elems->erp_info[0]; 5866 } else { 5867 erp_valid = false; 5868 } 5869 5870 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5871 changed |= ieee80211_handle_bss_capability(link, 5872 le16_to_cpu(mgmt->u.beacon.capab_info), 5873 erp_valid, erp_value); 5874 5875 mutex_lock(&local->sta_mtx); 5876 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5877 if (WARN_ON(!sta)) { 5878 mutex_unlock(&local->sta_mtx); 5879 goto free; 5880 } 5881 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5882 lockdep_is_held(&local->sta_mtx)); 5883 if (WARN_ON(!link_sta)) { 5884 mutex_unlock(&local->sta_mtx); 5885 goto free; 5886 } 5887 5888 if (WARN_ON(!link->conf->chandef.chan)) 5889 goto free; 5890 5891 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5892 5893 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5894 5895 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5896 elems->vht_cap_elem, elems->ht_operation, 5897 elems->vht_operation, elems->he_operation, 5898 elems->eht_operation, 5899 elems->s1g_oper, bssid, &changed)) { 5900 mutex_unlock(&local->sta_mtx); 5901 sdata_info(sdata, 5902 "failed to follow AP %pM bandwidth change, disconnect\n", 5903 bssid); 5904 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5905 WLAN_REASON_DEAUTH_LEAVING, 5906 true, deauth_buf); 5907 ieee80211_report_disconnect(sdata, deauth_buf, 5908 sizeof(deauth_buf), true, 5909 WLAN_REASON_DEAUTH_LEAVING, 5910 false); 5911 goto free; 5912 } 5913 5914 if (elems->opmode_notif) 5915 ieee80211_vht_handle_opmode(sdata, link_sta, 5916 *elems->opmode_notif, 5917 rx_status->band); 5918 mutex_unlock(&local->sta_mtx); 5919 5920 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5921 elems->country_elem, 5922 elems->country_elem_len, 5923 elems->pwr_constr_elem, 5924 elems->cisco_dtpc_elem); 5925 5926 if (elems->eht_operation && 5927 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 5928 if (!ieee80211_config_puncturing(link, elems->eht_operation, 5929 &changed)) { 5930 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5931 WLAN_REASON_DEAUTH_LEAVING, 5932 true, deauth_buf); 5933 ieee80211_report_disconnect(sdata, deauth_buf, 5934 sizeof(deauth_buf), true, 5935 WLAN_REASON_DEAUTH_LEAVING, 5936 false); 5937 goto free; 5938 } 5939 } 5940 5941 ieee80211_link_info_change_notify(sdata, link, changed); 5942 free: 5943 kfree(elems); 5944 } 5945 5946 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5947 struct sk_buff *skb) 5948 { 5949 struct ieee80211_link_data *link = &sdata->deflink; 5950 struct ieee80211_rx_status *rx_status; 5951 struct ieee80211_hdr *hdr; 5952 u16 fc; 5953 5954 rx_status = (struct ieee80211_rx_status *) skb->cb; 5955 hdr = (struct ieee80211_hdr *) skb->data; 5956 fc = le16_to_cpu(hdr->frame_control); 5957 5958 sdata_lock(sdata); 5959 switch (fc & IEEE80211_FCTL_STYPE) { 5960 case IEEE80211_STYPE_S1G_BEACON: 5961 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5962 break; 5963 } 5964 sdata_unlock(sdata); 5965 } 5966 5967 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5968 struct sk_buff *skb) 5969 { 5970 struct ieee80211_link_data *link = &sdata->deflink; 5971 struct ieee80211_rx_status *rx_status; 5972 struct ieee80211_mgmt *mgmt; 5973 u16 fc; 5974 int ies_len; 5975 5976 rx_status = (struct ieee80211_rx_status *) skb->cb; 5977 mgmt = (struct ieee80211_mgmt *) skb->data; 5978 fc = le16_to_cpu(mgmt->frame_control); 5979 5980 sdata_lock(sdata); 5981 5982 if (rx_status->link_valid) { 5983 link = sdata_dereference(sdata->link[rx_status->link_id], 5984 sdata); 5985 if (!link) 5986 goto out; 5987 } 5988 5989 switch (fc & IEEE80211_FCTL_STYPE) { 5990 case IEEE80211_STYPE_BEACON: 5991 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5992 skb->len, rx_status); 5993 break; 5994 case IEEE80211_STYPE_PROBE_RESP: 5995 ieee80211_rx_mgmt_probe_resp(link, skb); 5996 break; 5997 case IEEE80211_STYPE_AUTH: 5998 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5999 break; 6000 case IEEE80211_STYPE_DEAUTH: 6001 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6002 break; 6003 case IEEE80211_STYPE_DISASSOC: 6004 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6005 break; 6006 case IEEE80211_STYPE_ASSOC_RESP: 6007 case IEEE80211_STYPE_REASSOC_RESP: 6008 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6009 break; 6010 case IEEE80211_STYPE_ACTION: 6011 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6012 struct ieee802_11_elems *elems; 6013 6014 ies_len = skb->len - 6015 offsetof(struct ieee80211_mgmt, 6016 u.action.u.chan_switch.variable); 6017 6018 if (ies_len < 0) 6019 break; 6020 6021 /* CSA IE cannot be overridden, no need for BSSID */ 6022 elems = ieee802_11_parse_elems( 6023 mgmt->u.action.u.chan_switch.variable, 6024 ies_len, true, NULL); 6025 6026 if (elems && !elems->parse_error) 6027 ieee80211_sta_process_chanswitch(link, 6028 rx_status->mactime, 6029 rx_status->device_timestamp, 6030 elems, false); 6031 kfree(elems); 6032 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6033 struct ieee802_11_elems *elems; 6034 6035 ies_len = skb->len - 6036 offsetof(struct ieee80211_mgmt, 6037 u.action.u.ext_chan_switch.variable); 6038 6039 if (ies_len < 0) 6040 break; 6041 6042 /* 6043 * extended CSA IE can't be overridden, no need for 6044 * BSSID 6045 */ 6046 elems = ieee802_11_parse_elems( 6047 mgmt->u.action.u.ext_chan_switch.variable, 6048 ies_len, true, NULL); 6049 6050 if (elems && !elems->parse_error) { 6051 /* for the handling code pretend it was an IE */ 6052 elems->ext_chansw_ie = 6053 &mgmt->u.action.u.ext_chan_switch.data; 6054 6055 ieee80211_sta_process_chanswitch(link, 6056 rx_status->mactime, 6057 rx_status->device_timestamp, 6058 elems, false); 6059 } 6060 6061 kfree(elems); 6062 } 6063 break; 6064 } 6065 out: 6066 sdata_unlock(sdata); 6067 } 6068 6069 static void ieee80211_sta_timer(struct timer_list *t) 6070 { 6071 struct ieee80211_sub_if_data *sdata = 6072 from_timer(sdata, t, u.mgd.timer); 6073 6074 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6075 } 6076 6077 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6078 u8 reason, bool tx) 6079 { 6080 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6081 6082 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6083 tx, frame_buf); 6084 6085 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6086 reason, false); 6087 } 6088 6089 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6090 { 6091 struct ieee80211_local *local = sdata->local; 6092 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6093 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6094 u32 tx_flags = 0; 6095 u16 trans = 1; 6096 u16 status = 0; 6097 struct ieee80211_prep_tx_info info = { 6098 .subtype = IEEE80211_STYPE_AUTH, 6099 }; 6100 6101 sdata_assert_lock(sdata); 6102 6103 if (WARN_ON_ONCE(!auth_data)) 6104 return -EINVAL; 6105 6106 auth_data->tries++; 6107 6108 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6109 sdata_info(sdata, "authentication with %pM timed out\n", 6110 auth_data->ap_addr); 6111 6112 /* 6113 * Most likely AP is not in the range so remove the 6114 * bss struct for that AP. 6115 */ 6116 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6117 6118 return -ETIMEDOUT; 6119 } 6120 6121 if (auth_data->algorithm == WLAN_AUTH_SAE) 6122 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6123 6124 drv_mgd_prepare_tx(local, sdata, &info); 6125 6126 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6127 auth_data->ap_addr, auth_data->tries, 6128 IEEE80211_AUTH_MAX_TRIES); 6129 6130 auth_data->expected_transaction = 2; 6131 6132 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6133 trans = auth_data->sae_trans; 6134 status = auth_data->sae_status; 6135 auth_data->expected_transaction = trans; 6136 } 6137 6138 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6139 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6140 IEEE80211_TX_INTFL_MLME_CONN_TX; 6141 6142 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6143 auth_data->data, auth_data->data_len, 6144 auth_data->ap_addr, auth_data->ap_addr, 6145 NULL, 0, 0, tx_flags); 6146 6147 if (tx_flags == 0) { 6148 if (auth_data->algorithm == WLAN_AUTH_SAE) 6149 auth_data->timeout = jiffies + 6150 IEEE80211_AUTH_TIMEOUT_SAE; 6151 else 6152 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6153 } else { 6154 auth_data->timeout = 6155 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6156 } 6157 6158 auth_data->timeout_started = true; 6159 run_again(sdata, auth_data->timeout); 6160 6161 return 0; 6162 } 6163 6164 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6165 { 6166 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6167 struct ieee80211_local *local = sdata->local; 6168 int ret; 6169 6170 sdata_assert_lock(sdata); 6171 6172 assoc_data->tries++; 6173 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6174 sdata_info(sdata, "association with %pM timed out\n", 6175 assoc_data->ap_addr); 6176 6177 /* 6178 * Most likely AP is not in the range so remove the 6179 * bss struct for that AP. 6180 */ 6181 cfg80211_unlink_bss(local->hw.wiphy, 6182 assoc_data->link[assoc_data->assoc_link_id].bss); 6183 6184 return -ETIMEDOUT; 6185 } 6186 6187 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6188 assoc_data->ap_addr, assoc_data->tries, 6189 IEEE80211_ASSOC_MAX_TRIES); 6190 ret = ieee80211_send_assoc(sdata); 6191 if (ret) 6192 return ret; 6193 6194 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6195 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6196 assoc_data->timeout_started = true; 6197 run_again(sdata, assoc_data->timeout); 6198 } else { 6199 assoc_data->timeout = 6200 round_jiffies_up(jiffies + 6201 IEEE80211_ASSOC_TIMEOUT_LONG); 6202 assoc_data->timeout_started = true; 6203 run_again(sdata, assoc_data->timeout); 6204 } 6205 6206 return 0; 6207 } 6208 6209 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6210 __le16 fc, bool acked) 6211 { 6212 struct ieee80211_local *local = sdata->local; 6213 6214 sdata->u.mgd.status_fc = fc; 6215 sdata->u.mgd.status_acked = acked; 6216 sdata->u.mgd.status_received = true; 6217 6218 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6219 } 6220 6221 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6222 { 6223 struct ieee80211_local *local = sdata->local; 6224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6225 6226 sdata_lock(sdata); 6227 6228 if (ifmgd->status_received) { 6229 __le16 fc = ifmgd->status_fc; 6230 bool status_acked = ifmgd->status_acked; 6231 6232 ifmgd->status_received = false; 6233 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6234 if (status_acked) { 6235 if (ifmgd->auth_data->algorithm == 6236 WLAN_AUTH_SAE) 6237 ifmgd->auth_data->timeout = 6238 jiffies + 6239 IEEE80211_AUTH_TIMEOUT_SAE; 6240 else 6241 ifmgd->auth_data->timeout = 6242 jiffies + 6243 IEEE80211_AUTH_TIMEOUT_SHORT; 6244 run_again(sdata, ifmgd->auth_data->timeout); 6245 } else { 6246 ifmgd->auth_data->timeout = jiffies - 1; 6247 } 6248 ifmgd->auth_data->timeout_started = true; 6249 } else if (ifmgd->assoc_data && 6250 (ieee80211_is_assoc_req(fc) || 6251 ieee80211_is_reassoc_req(fc))) { 6252 if (status_acked) { 6253 ifmgd->assoc_data->timeout = 6254 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6255 run_again(sdata, ifmgd->assoc_data->timeout); 6256 } else { 6257 ifmgd->assoc_data->timeout = jiffies - 1; 6258 } 6259 ifmgd->assoc_data->timeout_started = true; 6260 } 6261 } 6262 6263 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6264 time_after(jiffies, ifmgd->auth_data->timeout)) { 6265 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6266 /* 6267 * ok ... we waited for assoc or continuation but 6268 * userspace didn't do it, so kill the auth data 6269 */ 6270 ieee80211_destroy_auth_data(sdata, false); 6271 } else if (ieee80211_auth(sdata)) { 6272 u8 ap_addr[ETH_ALEN]; 6273 struct ieee80211_event event = { 6274 .type = MLME_EVENT, 6275 .u.mlme.data = AUTH_EVENT, 6276 .u.mlme.status = MLME_TIMEOUT, 6277 }; 6278 6279 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6280 6281 ieee80211_destroy_auth_data(sdata, false); 6282 6283 cfg80211_auth_timeout(sdata->dev, ap_addr); 6284 drv_event_callback(sdata->local, sdata, &event); 6285 } 6286 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6287 run_again(sdata, ifmgd->auth_data->timeout); 6288 6289 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6290 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6291 if ((ifmgd->assoc_data->need_beacon && 6292 !sdata->deflink.u.mgd.have_beacon) || 6293 ieee80211_do_assoc(sdata)) { 6294 struct ieee80211_event event = { 6295 .type = MLME_EVENT, 6296 .u.mlme.data = ASSOC_EVENT, 6297 .u.mlme.status = MLME_TIMEOUT, 6298 }; 6299 6300 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6301 drv_event_callback(sdata->local, sdata, &event); 6302 } 6303 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6304 run_again(sdata, ifmgd->assoc_data->timeout); 6305 6306 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6307 ifmgd->associated) { 6308 u8 *bssid = sdata->deflink.u.mgd.bssid; 6309 int max_tries; 6310 6311 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6312 max_tries = max_nullfunc_tries; 6313 else 6314 max_tries = max_probe_tries; 6315 6316 /* ACK received for nullfunc probing frame */ 6317 if (!ifmgd->probe_send_count) 6318 ieee80211_reset_ap_probe(sdata); 6319 else if (ifmgd->nullfunc_failed) { 6320 if (ifmgd->probe_send_count < max_tries) { 6321 mlme_dbg(sdata, 6322 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6323 bssid, ifmgd->probe_send_count, 6324 max_tries); 6325 ieee80211_mgd_probe_ap_send(sdata); 6326 } else { 6327 mlme_dbg(sdata, 6328 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6329 bssid); 6330 ieee80211_sta_connection_lost(sdata, 6331 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6332 false); 6333 } 6334 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6335 run_again(sdata, ifmgd->probe_timeout); 6336 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6337 mlme_dbg(sdata, 6338 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6339 bssid, probe_wait_ms); 6340 ieee80211_sta_connection_lost(sdata, 6341 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6342 } else if (ifmgd->probe_send_count < max_tries) { 6343 mlme_dbg(sdata, 6344 "No probe response from AP %pM after %dms, try %d/%i\n", 6345 bssid, probe_wait_ms, 6346 ifmgd->probe_send_count, max_tries); 6347 ieee80211_mgd_probe_ap_send(sdata); 6348 } else { 6349 /* 6350 * We actually lost the connection ... or did we? 6351 * Let's make sure! 6352 */ 6353 mlme_dbg(sdata, 6354 "No probe response from AP %pM after %dms, disconnecting.\n", 6355 bssid, probe_wait_ms); 6356 6357 ieee80211_sta_connection_lost(sdata, 6358 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6359 } 6360 } 6361 6362 sdata_unlock(sdata); 6363 } 6364 6365 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6366 { 6367 struct ieee80211_sub_if_data *sdata = 6368 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6369 6370 if (WARN_ON(sdata->vif.valid_links)) 6371 return; 6372 6373 if (sdata->vif.bss_conf.csa_active && 6374 !sdata->deflink.u.mgd.csa_waiting_bcn) 6375 return; 6376 6377 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6378 return; 6379 6380 sdata->u.mgd.connection_loss = false; 6381 wiphy_work_queue(sdata->local->hw.wiphy, 6382 &sdata->u.mgd.beacon_connection_loss_work); 6383 } 6384 6385 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6386 { 6387 struct ieee80211_sub_if_data *sdata = 6388 from_timer(sdata, t, u.mgd.conn_mon_timer); 6389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6390 struct ieee80211_local *local = sdata->local; 6391 struct sta_info *sta; 6392 unsigned long timeout; 6393 6394 if (WARN_ON(sdata->vif.valid_links)) 6395 return; 6396 6397 if (sdata->vif.bss_conf.csa_active && 6398 !sdata->deflink.u.mgd.csa_waiting_bcn) 6399 return; 6400 6401 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6402 if (!sta) 6403 return; 6404 6405 timeout = sta->deflink.status_stats.last_ack; 6406 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6407 timeout = sta->deflink.rx_stats.last_rx; 6408 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6409 6410 /* If timeout is after now, then update timer to fire at 6411 * the later date, but do not actually probe at this time. 6412 */ 6413 if (time_is_after_jiffies(timeout)) { 6414 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6415 return; 6416 } 6417 6418 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6419 } 6420 6421 static void ieee80211_sta_monitor_work(struct work_struct *work) 6422 { 6423 struct ieee80211_sub_if_data *sdata = 6424 container_of(work, struct ieee80211_sub_if_data, 6425 u.mgd.monitor_work); 6426 6427 ieee80211_mgd_probe_ap(sdata, false); 6428 } 6429 6430 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6431 { 6432 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6433 __ieee80211_stop_poll(sdata); 6434 6435 /* let's probe the connection once */ 6436 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6437 ieee80211_queue_work(&sdata->local->hw, 6438 &sdata->u.mgd.monitor_work); 6439 } 6440 } 6441 6442 #ifdef CONFIG_PM 6443 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6444 { 6445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6446 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6447 6448 sdata_lock(sdata); 6449 6450 if (ifmgd->auth_data || ifmgd->assoc_data) { 6451 const u8 *ap_addr = ifmgd->auth_data ? 6452 ifmgd->auth_data->ap_addr : 6453 ifmgd->assoc_data->ap_addr; 6454 6455 /* 6456 * If we are trying to authenticate / associate while suspending, 6457 * cfg80211 won't know and won't actually abort those attempts, 6458 * thus we need to do that ourselves. 6459 */ 6460 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6461 IEEE80211_STYPE_DEAUTH, 6462 WLAN_REASON_DEAUTH_LEAVING, 6463 false, frame_buf); 6464 if (ifmgd->assoc_data) 6465 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6466 if (ifmgd->auth_data) 6467 ieee80211_destroy_auth_data(sdata, false); 6468 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6469 IEEE80211_DEAUTH_FRAME_LEN, 6470 false); 6471 } 6472 6473 /* This is a bit of a hack - we should find a better and more generic 6474 * solution to this. Normally when suspending, cfg80211 will in fact 6475 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6476 * auth (not so important) or assoc (this is the problem) process. 6477 * 6478 * As a consequence, it can happen that we are in the process of both 6479 * associating and suspending, and receive an association response 6480 * after cfg80211 has checked if it needs to disconnect, but before 6481 * we actually set the flag to drop incoming frames. This will then 6482 * cause the workqueue flush to process the association response in 6483 * the suspend, resulting in a successful association just before it 6484 * tries to remove the interface from the driver, which now though 6485 * has a channel context assigned ... this results in issues. 6486 * 6487 * To work around this (for now) simply deauth here again if we're 6488 * now connected. 6489 */ 6490 if (ifmgd->associated && !sdata->local->wowlan) { 6491 u8 bssid[ETH_ALEN]; 6492 struct cfg80211_deauth_request req = { 6493 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6494 .bssid = bssid, 6495 }; 6496 6497 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6498 ieee80211_mgd_deauth(sdata, &req); 6499 } 6500 6501 sdata_unlock(sdata); 6502 } 6503 #endif 6504 6505 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6506 { 6507 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6508 6509 sdata_lock(sdata); 6510 if (!ifmgd->associated) { 6511 sdata_unlock(sdata); 6512 return; 6513 } 6514 6515 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6516 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6517 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6518 ieee80211_sta_connection_lost(sdata, 6519 WLAN_REASON_UNSPECIFIED, 6520 true); 6521 sdata_unlock(sdata); 6522 return; 6523 } 6524 6525 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6526 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6527 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6528 ieee80211_sta_connection_lost(sdata, 6529 WLAN_REASON_UNSPECIFIED, 6530 true); 6531 sdata_unlock(sdata); 6532 return; 6533 } 6534 6535 sdata_unlock(sdata); 6536 } 6537 6538 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 6539 struct wiphy_work *work) 6540 { 6541 struct ieee80211_link_data *link = 6542 container_of(work, struct ieee80211_link_data, 6543 u.mgd.request_smps_work); 6544 6545 sdata_lock(link->sdata); 6546 __ieee80211_request_smps_mgd(link->sdata, link, 6547 link->u.mgd.driver_smps_mode); 6548 sdata_unlock(link->sdata); 6549 } 6550 6551 /* interface setup */ 6552 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6553 { 6554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6555 6556 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6557 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 6558 ieee80211_beacon_connection_loss_work); 6559 wiphy_work_init(&ifmgd->csa_connection_drop_work, 6560 ieee80211_csa_connection_drop_work); 6561 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6562 ieee80211_tdls_peer_del_work); 6563 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6564 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6565 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6566 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6567 ieee80211_sta_handle_tspec_ac_params_wk); 6568 6569 ifmgd->flags = 0; 6570 ifmgd->powersave = sdata->wdev.ps; 6571 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6572 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6573 /* Setup TDLS data */ 6574 spin_lock_init(&ifmgd->teardown_lock); 6575 ifmgd->teardown_skb = NULL; 6576 ifmgd->orig_teardown_skb = NULL; 6577 } 6578 6579 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6580 { 6581 struct ieee80211_sub_if_data *sdata = link->sdata; 6582 struct ieee80211_local *local = sdata->local; 6583 unsigned int link_id = link->link_id; 6584 6585 link->u.mgd.p2p_noa_index = -1; 6586 link->u.mgd.conn_flags = 0; 6587 link->conf->bssid = link->u.mgd.bssid; 6588 6589 wiphy_work_init(&link->u.mgd.request_smps_work, 6590 ieee80211_request_smps_mgd_work); 6591 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6592 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6593 else 6594 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6595 6596 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 6597 ieee80211_chswitch_work); 6598 6599 if (sdata->u.mgd.assoc_data) 6600 ether_addr_copy(link->conf->addr, 6601 sdata->u.mgd.assoc_data->link[link_id].addr); 6602 else if (!is_valid_ether_addr(link->conf->addr)) 6603 eth_random_addr(link->conf->addr); 6604 } 6605 6606 /* scan finished notification */ 6607 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6608 { 6609 struct ieee80211_sub_if_data *sdata; 6610 6611 /* Restart STA timers */ 6612 rcu_read_lock(); 6613 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6614 if (ieee80211_sdata_running(sdata)) 6615 ieee80211_restart_sta_timer(sdata); 6616 } 6617 rcu_read_unlock(); 6618 } 6619 6620 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6621 struct cfg80211_bss *cbss, s8 link_id, 6622 const u8 *ap_mld_addr, bool assoc, 6623 bool override) 6624 { 6625 struct ieee80211_local *local = sdata->local; 6626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6627 struct ieee80211_bss *bss = (void *)cbss->priv; 6628 struct sta_info *new_sta = NULL; 6629 struct ieee80211_link_data *link; 6630 bool have_sta = false; 6631 bool mlo; 6632 int err; 6633 6634 if (link_id >= 0) { 6635 mlo = true; 6636 if (WARN_ON(!ap_mld_addr)) 6637 return -EINVAL; 6638 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6639 } else { 6640 if (WARN_ON(ap_mld_addr)) 6641 return -EINVAL; 6642 ap_mld_addr = cbss->bssid; 6643 err = ieee80211_vif_set_links(sdata, 0); 6644 link_id = 0; 6645 mlo = false; 6646 } 6647 6648 if (err) 6649 return err; 6650 6651 link = sdata_dereference(sdata->link[link_id], sdata); 6652 if (WARN_ON(!link)) { 6653 err = -ENOLINK; 6654 goto out_err; 6655 } 6656 6657 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6658 err = -EINVAL; 6659 goto out_err; 6660 } 6661 6662 /* If a reconfig is happening, bail out */ 6663 if (local->in_reconfig) { 6664 err = -EBUSY; 6665 goto out_err; 6666 } 6667 6668 if (assoc) { 6669 rcu_read_lock(); 6670 have_sta = sta_info_get(sdata, ap_mld_addr); 6671 rcu_read_unlock(); 6672 } 6673 6674 if (!have_sta) { 6675 if (mlo) 6676 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6677 link_id, cbss->bssid, 6678 GFP_KERNEL); 6679 else 6680 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6681 6682 if (!new_sta) { 6683 err = -ENOMEM; 6684 goto out_err; 6685 } 6686 6687 new_sta->sta.mlo = mlo; 6688 } 6689 6690 /* 6691 * Set up the information for the new channel before setting the 6692 * new channel. We can't - completely race-free - change the basic 6693 * rates bitmap and the channel (sband) that it refers to, but if 6694 * we set it up before we at least avoid calling into the driver's 6695 * bss_info_changed() method with invalid information (since we do 6696 * call that from changing the channel - only for IDLE and perhaps 6697 * some others, but ...). 6698 * 6699 * So to avoid that, just set up all the new information before the 6700 * channel, but tell the driver to apply it only afterwards, since 6701 * it might need the new channel for that. 6702 */ 6703 if (new_sta) { 6704 const struct cfg80211_bss_ies *ies; 6705 struct link_sta_info *link_sta; 6706 6707 rcu_read_lock(); 6708 link_sta = rcu_dereference(new_sta->link[link_id]); 6709 if (WARN_ON(!link_sta)) { 6710 rcu_read_unlock(); 6711 sta_info_free(local, new_sta); 6712 err = -EINVAL; 6713 goto out_err; 6714 } 6715 6716 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6717 link_sta, cbss); 6718 if (err) { 6719 rcu_read_unlock(); 6720 sta_info_free(local, new_sta); 6721 goto out_err; 6722 } 6723 6724 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6725 6726 /* set timing information */ 6727 link->conf->beacon_int = cbss->beacon_interval; 6728 ies = rcu_dereference(cbss->beacon_ies); 6729 if (ies) { 6730 link->conf->sync_tsf = ies->tsf; 6731 link->conf->sync_device_ts = 6732 bss->device_ts_beacon; 6733 6734 ieee80211_get_dtim(ies, 6735 &link->conf->sync_dtim_count, 6736 NULL); 6737 } else if (!ieee80211_hw_check(&sdata->local->hw, 6738 TIMING_BEACON_ONLY)) { 6739 ies = rcu_dereference(cbss->proberesp_ies); 6740 /* must be non-NULL since beacon IEs were NULL */ 6741 link->conf->sync_tsf = ies->tsf; 6742 link->conf->sync_device_ts = 6743 bss->device_ts_presp; 6744 link->conf->sync_dtim_count = 0; 6745 } else { 6746 link->conf->sync_tsf = 0; 6747 link->conf->sync_device_ts = 0; 6748 link->conf->sync_dtim_count = 0; 6749 } 6750 rcu_read_unlock(); 6751 } 6752 6753 if (new_sta || override) { 6754 err = ieee80211_prep_channel(sdata, link, cbss, 6755 &link->u.mgd.conn_flags); 6756 if (err) { 6757 if (new_sta) 6758 sta_info_free(local, new_sta); 6759 goto out_err; 6760 } 6761 } 6762 6763 if (new_sta) { 6764 /* 6765 * tell driver about BSSID, basic rates and timing 6766 * this was set up above, before setting the channel 6767 */ 6768 ieee80211_link_info_change_notify(sdata, link, 6769 BSS_CHANGED_BSSID | 6770 BSS_CHANGED_BASIC_RATES | 6771 BSS_CHANGED_BEACON_INT); 6772 6773 if (assoc) 6774 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6775 6776 err = sta_info_insert(new_sta); 6777 new_sta = NULL; 6778 if (err) { 6779 sdata_info(sdata, 6780 "failed to insert STA entry for the AP (error %d)\n", 6781 err); 6782 goto out_err; 6783 } 6784 } else 6785 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6786 6787 /* Cancel scan to ensure that nothing interferes with connection */ 6788 if (local->scanning) 6789 ieee80211_scan_cancel(local); 6790 6791 return 0; 6792 6793 out_err: 6794 ieee80211_link_release_channel(&sdata->deflink); 6795 ieee80211_vif_set_links(sdata, 0); 6796 return err; 6797 } 6798 6799 /* config hooks */ 6800 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6801 struct cfg80211_auth_request *req) 6802 { 6803 struct ieee80211_local *local = sdata->local; 6804 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6805 struct ieee80211_mgd_auth_data *auth_data; 6806 u16 auth_alg; 6807 int err; 6808 bool cont_auth; 6809 6810 /* prepare auth data structure */ 6811 6812 switch (req->auth_type) { 6813 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6814 auth_alg = WLAN_AUTH_OPEN; 6815 break; 6816 case NL80211_AUTHTYPE_SHARED_KEY: 6817 if (fips_enabled) 6818 return -EOPNOTSUPP; 6819 auth_alg = WLAN_AUTH_SHARED_KEY; 6820 break; 6821 case NL80211_AUTHTYPE_FT: 6822 auth_alg = WLAN_AUTH_FT; 6823 break; 6824 case NL80211_AUTHTYPE_NETWORK_EAP: 6825 auth_alg = WLAN_AUTH_LEAP; 6826 break; 6827 case NL80211_AUTHTYPE_SAE: 6828 auth_alg = WLAN_AUTH_SAE; 6829 break; 6830 case NL80211_AUTHTYPE_FILS_SK: 6831 auth_alg = WLAN_AUTH_FILS_SK; 6832 break; 6833 case NL80211_AUTHTYPE_FILS_SK_PFS: 6834 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6835 break; 6836 case NL80211_AUTHTYPE_FILS_PK: 6837 auth_alg = WLAN_AUTH_FILS_PK; 6838 break; 6839 default: 6840 return -EOPNOTSUPP; 6841 } 6842 6843 if (ifmgd->assoc_data) 6844 return -EBUSY; 6845 6846 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6847 req->ie_len, GFP_KERNEL); 6848 if (!auth_data) 6849 return -ENOMEM; 6850 6851 memcpy(auth_data->ap_addr, 6852 req->ap_mld_addr ?: req->bss->bssid, 6853 ETH_ALEN); 6854 auth_data->bss = req->bss; 6855 auth_data->link_id = req->link_id; 6856 6857 if (req->auth_data_len >= 4) { 6858 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6859 __le16 *pos = (__le16 *) req->auth_data; 6860 6861 auth_data->sae_trans = le16_to_cpu(pos[0]); 6862 auth_data->sae_status = le16_to_cpu(pos[1]); 6863 } 6864 memcpy(auth_data->data, req->auth_data + 4, 6865 req->auth_data_len - 4); 6866 auth_data->data_len += req->auth_data_len - 4; 6867 } 6868 6869 /* Check if continuing authentication or trying to authenticate with the 6870 * same BSS that we were in the process of authenticating with and avoid 6871 * removal and re-addition of the STA entry in 6872 * ieee80211_prep_connection(). 6873 */ 6874 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6875 ifmgd->auth_data->link_id == req->link_id; 6876 6877 if (req->ie && req->ie_len) { 6878 memcpy(&auth_data->data[auth_data->data_len], 6879 req->ie, req->ie_len); 6880 auth_data->data_len += req->ie_len; 6881 } 6882 6883 if (req->key && req->key_len) { 6884 auth_data->key_len = req->key_len; 6885 auth_data->key_idx = req->key_idx; 6886 memcpy(auth_data->key, req->key, req->key_len); 6887 } 6888 6889 auth_data->algorithm = auth_alg; 6890 6891 /* try to authenticate/probe */ 6892 6893 if (ifmgd->auth_data) { 6894 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6895 auth_data->peer_confirmed = 6896 ifmgd->auth_data->peer_confirmed; 6897 } 6898 ieee80211_destroy_auth_data(sdata, cont_auth); 6899 } 6900 6901 /* prep auth_data so we don't go into idle on disassoc */ 6902 ifmgd->auth_data = auth_data; 6903 6904 /* If this is continuation of an ongoing SAE authentication exchange 6905 * (i.e., request to send SAE Confirm) and the peer has already 6906 * confirmed, mark authentication completed since we are about to send 6907 * out SAE Confirm. 6908 */ 6909 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6910 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6911 ieee80211_mark_sta_auth(sdata); 6912 6913 if (ifmgd->associated) { 6914 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6915 6916 sdata_info(sdata, 6917 "disconnect from AP %pM for new auth to %pM\n", 6918 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6919 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6920 WLAN_REASON_UNSPECIFIED, 6921 false, frame_buf); 6922 6923 ieee80211_report_disconnect(sdata, frame_buf, 6924 sizeof(frame_buf), true, 6925 WLAN_REASON_UNSPECIFIED, 6926 false); 6927 } 6928 6929 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6930 6931 /* needed for transmitting the auth frame(s) properly */ 6932 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6933 6934 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6935 req->ap_mld_addr, cont_auth, false); 6936 if (err) 6937 goto err_clear; 6938 6939 err = ieee80211_auth(sdata); 6940 if (err) { 6941 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6942 goto err_clear; 6943 } 6944 6945 /* hold our own reference */ 6946 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6947 return 0; 6948 6949 err_clear: 6950 if (!sdata->vif.valid_links) { 6951 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6952 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6953 BSS_CHANGED_BSSID); 6954 mutex_lock(&sdata->local->mtx); 6955 ieee80211_link_release_channel(&sdata->deflink); 6956 mutex_unlock(&sdata->local->mtx); 6957 } 6958 ifmgd->auth_data = NULL; 6959 kfree(auth_data); 6960 return err; 6961 } 6962 6963 static ieee80211_conn_flags_t 6964 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6965 struct ieee80211_mgd_assoc_data *assoc_data, 6966 struct cfg80211_assoc_request *req, 6967 ieee80211_conn_flags_t conn_flags, 6968 unsigned int link_id) 6969 { 6970 struct ieee80211_local *local = sdata->local; 6971 const struct cfg80211_bss_ies *beacon_ies; 6972 struct ieee80211_supported_band *sband; 6973 const struct element *ht_elem, *vht_elem; 6974 struct ieee80211_link_data *link; 6975 struct cfg80211_bss *cbss; 6976 struct ieee80211_bss *bss; 6977 bool is_5ghz, is_6ghz; 6978 6979 cbss = assoc_data->link[link_id].bss; 6980 if (WARN_ON(!cbss)) 6981 return 0; 6982 6983 bss = (void *)cbss->priv; 6984 6985 sband = local->hw.wiphy->bands[cbss->channel->band]; 6986 if (WARN_ON(!sband)) 6987 return 0; 6988 6989 link = sdata_dereference(sdata->link[link_id], sdata); 6990 if (WARN_ON(!link)) 6991 return 0; 6992 6993 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6994 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6995 6996 /* for MLO connections assume advertising all rates is OK */ 6997 if (!req->ap_mld_addr) { 6998 assoc_data->supp_rates = bss->supp_rates; 6999 assoc_data->supp_rates_len = bss->supp_rates_len; 7000 } 7001 7002 /* copy and link elems for the STA profile */ 7003 if (req->links[link_id].elems_len) { 7004 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7005 req->links[link_id].elems_len); 7006 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7007 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7008 assoc_data->ie_pos += req->links[link_id].elems_len; 7009 } 7010 7011 rcu_read_lock(); 7012 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7013 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7014 assoc_data->link[link_id].ap_ht_param = 7015 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7016 else if (!is_6ghz) 7017 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7018 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7019 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7020 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7021 sizeof(struct ieee80211_vht_cap)); 7022 } else if (is_5ghz) { 7023 link_info(link, 7024 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7025 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7026 IEEE80211_CONN_DISABLE_HE | 7027 IEEE80211_CONN_DISABLE_EHT; 7028 } 7029 rcu_read_unlock(); 7030 7031 link->u.mgd.beacon_crc_valid = false; 7032 link->u.mgd.dtim_period = 0; 7033 link->u.mgd.have_beacon = false; 7034 7035 /* override HT/VHT configuration only if the AP and we support it */ 7036 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7037 struct ieee80211_sta_ht_cap sta_ht_cap; 7038 7039 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7040 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7041 } 7042 7043 link->conf->eht_puncturing = 0; 7044 7045 rcu_read_lock(); 7046 beacon_ies = rcu_dereference(cbss->beacon_ies); 7047 if (beacon_ies) { 7048 const struct ieee80211_eht_operation *eht_oper; 7049 const struct element *elem; 7050 u8 dtim_count = 0; 7051 7052 ieee80211_get_dtim(beacon_ies, &dtim_count, 7053 &link->u.mgd.dtim_period); 7054 7055 sdata->deflink.u.mgd.have_beacon = true; 7056 7057 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7058 link->conf->sync_tsf = beacon_ies->tsf; 7059 link->conf->sync_device_ts = bss->device_ts_beacon; 7060 link->conf->sync_dtim_count = dtim_count; 7061 } 7062 7063 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7064 beacon_ies->data, beacon_ies->len); 7065 if (elem && elem->datalen >= 3) 7066 link->conf->profile_periodicity = elem->data[2]; 7067 else 7068 link->conf->profile_periodicity = 0; 7069 7070 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7071 beacon_ies->data, beacon_ies->len); 7072 if (elem && elem->datalen >= 11 && 7073 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7074 link->conf->ema_ap = true; 7075 else 7076 link->conf->ema_ap = false; 7077 7078 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7079 beacon_ies->data, beacon_ies->len); 7080 eht_oper = (const void *)(elem->data + 1); 7081 7082 if (elem && 7083 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7084 elem->datalen - 1) && 7085 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7086 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7087 const struct ieee80211_eht_operation_info *info = 7088 (void *)eht_oper->optional; 7089 const u8 *disable_subchannel_bitmap = info->optional; 7090 u16 bitmap; 7091 7092 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7093 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7094 &link->conf->chandef)) 7095 ieee80211_handle_puncturing_bitmap(link, 7096 eht_oper, 7097 bitmap, 7098 NULL); 7099 else 7100 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7101 } 7102 } 7103 rcu_read_unlock(); 7104 7105 if (bss->corrupt_data) { 7106 char *corrupt_type = "data"; 7107 7108 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7109 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7110 corrupt_type = "beacon and probe response"; 7111 else 7112 corrupt_type = "beacon"; 7113 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7114 corrupt_type = "probe response"; 7115 } 7116 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7117 cbss->bssid, corrupt_type); 7118 } 7119 7120 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7121 if (sdata->u.mgd.powersave) 7122 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7123 else 7124 link->smps_mode = IEEE80211_SMPS_OFF; 7125 } else { 7126 link->smps_mode = link->u.mgd.req_smps; 7127 } 7128 7129 return conn_flags; 7130 } 7131 7132 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7133 struct cfg80211_assoc_request *req) 7134 { 7135 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7136 struct ieee80211_local *local = sdata->local; 7137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7138 struct ieee80211_mgd_assoc_data *assoc_data; 7139 const struct element *ssid_elem; 7140 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7141 ieee80211_conn_flags_t conn_flags = 0; 7142 struct ieee80211_link_data *link; 7143 struct cfg80211_bss *cbss; 7144 struct ieee80211_bss *bss; 7145 bool override; 7146 int i, err; 7147 size_t size = sizeof(*assoc_data) + req->ie_len; 7148 7149 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7150 size += req->links[i].elems_len; 7151 7152 /* FIXME: no support for 4-addr MLO yet */ 7153 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7154 return -EOPNOTSUPP; 7155 7156 assoc_data = kzalloc(size, GFP_KERNEL); 7157 if (!assoc_data) 7158 return -ENOMEM; 7159 7160 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7161 7162 rcu_read_lock(); 7163 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7164 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7165 rcu_read_unlock(); 7166 kfree(assoc_data); 7167 return -EINVAL; 7168 } 7169 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7170 assoc_data->ssid_len = ssid_elem->datalen; 7171 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7172 vif_cfg->ssid_len = assoc_data->ssid_len; 7173 rcu_read_unlock(); 7174 7175 if (req->ap_mld_addr) { 7176 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7177 if (!req->links[i].bss) 7178 continue; 7179 link = sdata_dereference(sdata->link[i], sdata); 7180 if (link) 7181 ether_addr_copy(assoc_data->link[i].addr, 7182 link->conf->addr); 7183 else 7184 eth_random_addr(assoc_data->link[i].addr); 7185 } 7186 } else { 7187 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7188 } 7189 7190 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7191 7192 memcpy(assoc_data->ap_addr, 7193 req->ap_mld_addr ?: req->bss->bssid, 7194 ETH_ALEN); 7195 7196 if (ifmgd->associated) { 7197 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7198 7199 sdata_info(sdata, 7200 "disconnect from AP %pM for new assoc to %pM\n", 7201 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7202 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7203 WLAN_REASON_UNSPECIFIED, 7204 false, frame_buf); 7205 7206 ieee80211_report_disconnect(sdata, frame_buf, 7207 sizeof(frame_buf), true, 7208 WLAN_REASON_UNSPECIFIED, 7209 false); 7210 } 7211 7212 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7213 err = -EBUSY; 7214 goto err_free; 7215 } 7216 7217 if (ifmgd->assoc_data) { 7218 err = -EBUSY; 7219 goto err_free; 7220 } 7221 7222 if (ifmgd->auth_data) { 7223 bool match; 7224 7225 /* keep sta info, bssid if matching */ 7226 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7227 assoc_data->ap_addr) && 7228 ifmgd->auth_data->link_id == req->link_id; 7229 ieee80211_destroy_auth_data(sdata, match); 7230 } 7231 7232 /* prepare assoc data */ 7233 7234 bss = (void *)cbss->priv; 7235 assoc_data->wmm = bss->wmm_used && 7236 (local->hw.queues >= IEEE80211_NUM_ACS); 7237 7238 /* 7239 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7240 * We still associate in non-HT mode (11a/b/g) if any one of these 7241 * ciphers is configured as pairwise. 7242 * We can set this to true for non-11n hardware, that'll be checked 7243 * separately along with the peer capabilities. 7244 */ 7245 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7246 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7247 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7248 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7249 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7250 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7251 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7252 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7253 netdev_info(sdata->dev, 7254 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7255 } 7256 } 7257 7258 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7259 if (!bss->wmm_used) { 7260 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7261 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7262 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7263 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7264 netdev_info(sdata->dev, 7265 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7266 } 7267 7268 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7269 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7270 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7271 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7272 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7273 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7274 } 7275 7276 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7277 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7278 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7279 } 7280 7281 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7282 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7283 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7284 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7285 } 7286 7287 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7288 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7289 7290 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7291 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7292 sizeof(ifmgd->ht_capa_mask)); 7293 7294 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7295 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7296 sizeof(ifmgd->vht_capa_mask)); 7297 7298 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7299 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7300 sizeof(ifmgd->s1g_capa_mask)); 7301 7302 if (req->ie && req->ie_len) { 7303 memcpy(assoc_data->ie, req->ie, req->ie_len); 7304 assoc_data->ie_len = req->ie_len; 7305 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7306 } else { 7307 assoc_data->ie_pos = assoc_data->ie; 7308 } 7309 7310 if (req->fils_kek) { 7311 /* should already be checked in cfg80211 - so warn */ 7312 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7313 err = -EINVAL; 7314 goto err_free; 7315 } 7316 memcpy(assoc_data->fils_kek, req->fils_kek, 7317 req->fils_kek_len); 7318 assoc_data->fils_kek_len = req->fils_kek_len; 7319 } 7320 7321 if (req->fils_nonces) 7322 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7323 2 * FILS_NONCE_LEN); 7324 7325 /* default timeout */ 7326 assoc_data->timeout = jiffies; 7327 assoc_data->timeout_started = true; 7328 7329 assoc_data->assoc_link_id = assoc_link_id; 7330 7331 if (req->ap_mld_addr) { 7332 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7333 assoc_data->link[i].conn_flags = conn_flags; 7334 assoc_data->link[i].bss = req->links[i].bss; 7335 } 7336 7337 /* if there was no authentication, set up the link */ 7338 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7339 if (err) 7340 goto err_clear; 7341 } else { 7342 assoc_data->link[0].conn_flags = conn_flags; 7343 assoc_data->link[0].bss = cbss; 7344 } 7345 7346 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7347 if (WARN_ON(!link)) { 7348 err = -EINVAL; 7349 goto err_clear; 7350 } 7351 7352 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7353 conn_flags |= link->u.mgd.conn_flags; 7354 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7355 conn_flags, assoc_link_id); 7356 override = link->u.mgd.conn_flags != conn_flags; 7357 link->u.mgd.conn_flags |= conn_flags; 7358 7359 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7360 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7361 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7362 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7363 7364 if (bss->wmm_used && bss->uapsd_supported && 7365 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7366 assoc_data->uapsd = true; 7367 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7368 } else { 7369 assoc_data->uapsd = false; 7370 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7371 } 7372 7373 if (req->prev_bssid) 7374 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7375 7376 if (req->use_mfp) { 7377 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7378 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7379 } else { 7380 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7381 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7382 } 7383 7384 if (req->flags & ASSOC_REQ_USE_RRM) 7385 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7386 else 7387 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7388 7389 if (req->crypto.control_port) 7390 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7391 else 7392 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7393 7394 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7395 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7396 sdata->control_port_over_nl80211 = 7397 req->crypto.control_port_over_nl80211; 7398 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7399 7400 /* kick off associate process */ 7401 ifmgd->assoc_data = assoc_data; 7402 7403 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7404 if (!assoc_data->link[i].bss) 7405 continue; 7406 if (i == assoc_data->assoc_link_id) 7407 continue; 7408 /* only calculate the flags, hence link == NULL */ 7409 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7410 &assoc_data->link[i].conn_flags); 7411 if (err) 7412 goto err_clear; 7413 } 7414 7415 /* needed for transmitting the assoc frames properly */ 7416 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7417 7418 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7419 req->ap_mld_addr, true, override); 7420 if (err) 7421 goto err_clear; 7422 7423 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7424 link->u.mgd.conn_flags; 7425 7426 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7427 const struct cfg80211_bss_ies *beacon_ies; 7428 7429 rcu_read_lock(); 7430 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7431 7432 if (beacon_ies) { 7433 /* 7434 * Wait up to one beacon interval ... 7435 * should this be more if we miss one? 7436 */ 7437 sdata_info(sdata, "waiting for beacon from %pM\n", 7438 link->u.mgd.bssid); 7439 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7440 assoc_data->timeout_started = true; 7441 assoc_data->need_beacon = true; 7442 } 7443 rcu_read_unlock(); 7444 } 7445 7446 run_again(sdata, assoc_data->timeout); 7447 7448 return 0; 7449 err_clear: 7450 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7451 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7452 BSS_CHANGED_BSSID); 7453 ifmgd->assoc_data = NULL; 7454 err_free: 7455 kfree(assoc_data); 7456 return err; 7457 } 7458 7459 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7460 struct cfg80211_deauth_request *req) 7461 { 7462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7463 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7464 bool tx = !req->local_state_change; 7465 struct ieee80211_prep_tx_info info = { 7466 .subtype = IEEE80211_STYPE_DEAUTH, 7467 }; 7468 7469 if (ifmgd->auth_data && 7470 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7471 sdata_info(sdata, 7472 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7473 req->bssid, req->reason_code, 7474 ieee80211_get_reason_code_string(req->reason_code)); 7475 7476 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7477 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7478 IEEE80211_STYPE_DEAUTH, 7479 req->reason_code, tx, 7480 frame_buf); 7481 ieee80211_destroy_auth_data(sdata, false); 7482 ieee80211_report_disconnect(sdata, frame_buf, 7483 sizeof(frame_buf), true, 7484 req->reason_code, false); 7485 drv_mgd_complete_tx(sdata->local, sdata, &info); 7486 return 0; 7487 } 7488 7489 if (ifmgd->assoc_data && 7490 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7491 sdata_info(sdata, 7492 "aborting association with %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 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7497 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7498 IEEE80211_STYPE_DEAUTH, 7499 req->reason_code, tx, 7500 frame_buf); 7501 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7502 ieee80211_report_disconnect(sdata, frame_buf, 7503 sizeof(frame_buf), true, 7504 req->reason_code, false); 7505 return 0; 7506 } 7507 7508 if (ifmgd->associated && 7509 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7510 sdata_info(sdata, 7511 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7512 req->bssid, req->reason_code, 7513 ieee80211_get_reason_code_string(req->reason_code)); 7514 7515 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7516 req->reason_code, tx, frame_buf); 7517 ieee80211_report_disconnect(sdata, frame_buf, 7518 sizeof(frame_buf), true, 7519 req->reason_code, false); 7520 drv_mgd_complete_tx(sdata->local, sdata, &info); 7521 return 0; 7522 } 7523 7524 return -ENOTCONN; 7525 } 7526 7527 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7528 struct cfg80211_disassoc_request *req) 7529 { 7530 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7531 7532 if (!sdata->u.mgd.associated || 7533 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7534 return -ENOTCONN; 7535 7536 sdata_info(sdata, 7537 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7538 req->ap_addr, req->reason_code, 7539 ieee80211_get_reason_code_string(req->reason_code)); 7540 7541 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7542 req->reason_code, !req->local_state_change, 7543 frame_buf); 7544 7545 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7546 req->reason_code, false); 7547 7548 return 0; 7549 } 7550 7551 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7552 { 7553 wiphy_work_cancel(link->sdata->local->hw.wiphy, 7554 &link->u.mgd.request_smps_work); 7555 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 7556 &link->u.mgd.chswitch_work); 7557 } 7558 7559 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7560 { 7561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7562 7563 /* 7564 * Make sure some work items will not run after this, 7565 * they will not do anything but might not have been 7566 * cancelled when disconnecting. 7567 */ 7568 cancel_work_sync(&ifmgd->monitor_work); 7569 wiphy_work_cancel(sdata->local->hw.wiphy, 7570 &ifmgd->beacon_connection_loss_work); 7571 wiphy_work_cancel(sdata->local->hw.wiphy, 7572 &ifmgd->csa_connection_drop_work); 7573 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7574 7575 sdata_lock(sdata); 7576 if (ifmgd->assoc_data) 7577 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7578 if (ifmgd->auth_data) 7579 ieee80211_destroy_auth_data(sdata, false); 7580 spin_lock_bh(&ifmgd->teardown_lock); 7581 if (ifmgd->teardown_skb) { 7582 kfree_skb(ifmgd->teardown_skb); 7583 ifmgd->teardown_skb = NULL; 7584 ifmgd->orig_teardown_skb = NULL; 7585 } 7586 kfree(ifmgd->assoc_req_ies); 7587 ifmgd->assoc_req_ies = NULL; 7588 ifmgd->assoc_req_ies_len = 0; 7589 spin_unlock_bh(&ifmgd->teardown_lock); 7590 del_timer_sync(&ifmgd->timer); 7591 sdata_unlock(sdata); 7592 } 7593 7594 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7595 enum nl80211_cqm_rssi_threshold_event rssi_event, 7596 s32 rssi_level, 7597 gfp_t gfp) 7598 { 7599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7600 7601 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7602 7603 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7604 } 7605 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7606 7607 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7608 { 7609 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7610 7611 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7612 7613 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7614 } 7615 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7616 7617 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7618 int rssi_min_thold, 7619 int rssi_max_thold) 7620 { 7621 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7622 7623 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7624 return; 7625 7626 /* 7627 * Scale up threshold values before storing it, as the RSSI averaging 7628 * algorithm uses a scaled up value as well. Change this scaling 7629 * factor if the RSSI averaging algorithm changes. 7630 */ 7631 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7632 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7633 } 7634 7635 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7636 int rssi_min_thold, 7637 int rssi_max_thold) 7638 { 7639 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7640 7641 WARN_ON(rssi_min_thold == rssi_max_thold || 7642 rssi_min_thold > rssi_max_thold); 7643 7644 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7645 rssi_max_thold); 7646 } 7647 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7648 7649 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7650 { 7651 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7652 7653 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7654 } 7655 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7656