1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2023 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * Extract from the given disabled subchannel bitmap (raw format 93 * from the EHT Operation Element) the bits for the subchannel 94 * we're using right now. 95 */ 96 static u16 97 ieee80211_extract_dis_subch_bmap(const struct ieee80211_eht_operation *eht_oper, 98 struct cfg80211_chan_def *chandef, u16 bitmap) 99 { 100 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 101 struct cfg80211_chan_def ap_chandef = *chandef; 102 u32 ap_center_freq, local_center_freq; 103 u32 ap_bw, local_bw; 104 int ap_start_freq, local_start_freq; 105 u16 shift, mask; 106 107 if (!(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) || 108 !(eht_oper->params & 109 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) 110 return 0; 111 112 /* set 160/320 supported to get the full AP definition */ 113 ieee80211_chandef_eht_oper(eht_oper, true, true, &ap_chandef); 114 ap_center_freq = ap_chandef.center_freq1; 115 ap_bw = 20 * BIT(u8_get_bits(info->control, 116 IEEE80211_EHT_OPER_CHAN_WIDTH)); 117 ap_start_freq = ap_center_freq - ap_bw / 2; 118 local_center_freq = chandef->center_freq1; 119 local_bw = 20 * BIT(ieee80211_chan_width_to_rx_bw(chandef->width)); 120 local_start_freq = local_center_freq - local_bw / 2; 121 shift = (local_start_freq - ap_start_freq) / 20; 122 mask = BIT(local_bw / 20) - 1; 123 124 return (bitmap >> shift) & mask; 125 } 126 127 /* 128 * Handle the puncturing bitmap, possibly downgrading bandwidth to get a 129 * valid bitmap. 130 */ 131 static void 132 ieee80211_handle_puncturing_bitmap(struct ieee80211_link_data *link, 133 const struct ieee80211_eht_operation *eht_oper, 134 u16 bitmap, u64 *changed) 135 { 136 struct cfg80211_chan_def *chandef = &link->conf->chandef; 137 u16 extracted; 138 u64 _changed = 0; 139 140 if (!changed) 141 changed = &_changed; 142 143 while (chandef->width > NL80211_CHAN_WIDTH_40) { 144 extracted = 145 ieee80211_extract_dis_subch_bmap(eht_oper, chandef, 146 bitmap); 147 148 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 149 chandef)) 150 break; 151 link->u.mgd.conn_flags |= 152 ieee80211_chandef_downgrade(chandef); 153 *changed |= BSS_CHANGED_BANDWIDTH; 154 } 155 156 if (chandef->width <= NL80211_CHAN_WIDTH_40) 157 extracted = 0; 158 159 if (link->conf->eht_puncturing != extracted) { 160 link->conf->eht_puncturing = extracted; 161 *changed |= BSS_CHANGED_EHT_PUNCTURING; 162 } 163 } 164 165 /* 166 * We can have multiple work items (and connection probing) 167 * scheduling this timer, but we need to take care to only 168 * reschedule it when it should fire _earlier_ than it was 169 * asked for before, or if it's not pending right now. This 170 * function ensures that. Note that it then is required to 171 * run this function for all timeouts after the first one 172 * has happened -- the work that runs from this timer will 173 * do that. 174 */ 175 static void run_again(struct ieee80211_sub_if_data *sdata, 176 unsigned long timeout) 177 { 178 sdata_assert_lock(sdata); 179 180 if (!timer_pending(&sdata->u.mgd.timer) || 181 time_before(timeout, sdata->u.mgd.timer.expires)) 182 mod_timer(&sdata->u.mgd.timer, timeout); 183 } 184 185 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 186 { 187 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 188 return; 189 190 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 191 return; 192 193 mod_timer(&sdata->u.mgd.bcn_mon_timer, 194 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 195 } 196 197 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 198 { 199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 200 201 if (unlikely(!ifmgd->associated)) 202 return; 203 204 if (ifmgd->probe_send_count) 205 ifmgd->probe_send_count = 0; 206 207 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 208 return; 209 210 mod_timer(&ifmgd->conn_mon_timer, 211 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 212 } 213 214 static int ecw2cw(int ecw) 215 { 216 return (1 << ecw) - 1; 217 } 218 219 static ieee80211_conn_flags_t 220 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 221 struct ieee80211_link_data *link, 222 ieee80211_conn_flags_t conn_flags, 223 struct ieee80211_supported_band *sband, 224 struct ieee80211_channel *channel, 225 u32 vht_cap_info, 226 const struct ieee80211_ht_operation *ht_oper, 227 const struct ieee80211_vht_operation *vht_oper, 228 const struct ieee80211_he_operation *he_oper, 229 const struct ieee80211_eht_operation *eht_oper, 230 const struct ieee80211_s1g_oper_ie *s1g_oper, 231 struct cfg80211_chan_def *chandef, bool tracking) 232 { 233 struct cfg80211_chan_def vht_chandef; 234 struct ieee80211_sta_ht_cap sta_ht_cap; 235 ieee80211_conn_flags_t ret; 236 u32 ht_cfreq; 237 238 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 239 chandef->chan = channel; 240 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 241 chandef->center_freq1 = channel->center_freq; 242 chandef->freq1_offset = channel->freq_offset; 243 244 if (channel->band == NL80211_BAND_6GHZ) { 245 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 246 chandef)) { 247 mlme_dbg(sdata, 248 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 249 ret = IEEE80211_CONN_DISABLE_HT | 250 IEEE80211_CONN_DISABLE_VHT | 251 IEEE80211_CONN_DISABLE_HE | 252 IEEE80211_CONN_DISABLE_EHT; 253 } else { 254 ret = 0; 255 } 256 vht_chandef = *chandef; 257 goto out; 258 } else if (sband->band == NL80211_BAND_S1GHZ) { 259 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 260 sdata_info(sdata, 261 "Missing S1G Operation Element? Trying operating == primary\n"); 262 chandef->width = ieee80211_s1g_channel_width(channel); 263 } 264 265 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 266 IEEE80211_CONN_DISABLE_VHT | 267 IEEE80211_CONN_DISABLE_80P80MHZ | 268 IEEE80211_CONN_DISABLE_160MHZ; 269 goto out; 270 } 271 272 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 273 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 274 275 if (!ht_oper || !sta_ht_cap.ht_supported) { 276 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 277 ret = IEEE80211_CONN_DISABLE_HT | 278 IEEE80211_CONN_DISABLE_VHT | 279 IEEE80211_CONN_DISABLE_HE | 280 IEEE80211_CONN_DISABLE_EHT; 281 goto out; 282 } 283 284 chandef->width = NL80211_CHAN_WIDTH_20; 285 286 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 287 channel->band); 288 /* check that channel matches the right operating channel */ 289 if (!tracking && channel->center_freq != ht_cfreq) { 290 /* 291 * It's possible that some APs are confused here; 292 * Netgear WNDR3700 sometimes reports 4 higher than 293 * the actual channel in association responses, but 294 * since we look at probe response/beacon data here 295 * it should be OK. 296 */ 297 sdata_info(sdata, 298 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 299 channel->center_freq, ht_cfreq, 300 ht_oper->primary_chan, channel->band); 301 ret = IEEE80211_CONN_DISABLE_HT | 302 IEEE80211_CONN_DISABLE_VHT | 303 IEEE80211_CONN_DISABLE_HE | 304 IEEE80211_CONN_DISABLE_EHT; 305 goto out; 306 } 307 308 /* check 40 MHz support, if we have it */ 309 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 310 ieee80211_chandef_ht_oper(ht_oper, chandef); 311 } else { 312 mlme_dbg(sdata, "40 MHz not supported\n"); 313 /* 40 MHz (and 80 MHz) must be supported for VHT */ 314 ret = IEEE80211_CONN_DISABLE_VHT; 315 /* also mark 40 MHz disabled */ 316 ret |= IEEE80211_CONN_DISABLE_40MHZ; 317 goto out; 318 } 319 320 if (!vht_oper || !sband->vht_cap.vht_supported) { 321 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 322 ret = IEEE80211_CONN_DISABLE_VHT; 323 goto out; 324 } 325 326 vht_chandef = *chandef; 327 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 328 he_oper && 329 (le32_to_cpu(he_oper->he_oper_params) & 330 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 331 struct ieee80211_vht_operation he_oper_vht_cap; 332 333 /* 334 * Set only first 3 bytes (other 2 aren't used in 335 * ieee80211_chandef_vht_oper() anyway) 336 */ 337 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 338 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 339 340 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 341 &he_oper_vht_cap, ht_oper, 342 &vht_chandef)) { 343 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 344 sdata_info(sdata, 345 "HE AP VHT information is invalid, disabling HE\n"); 346 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 347 goto out; 348 } 349 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 350 vht_cap_info, 351 vht_oper, ht_oper, 352 &vht_chandef)) { 353 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 354 sdata_info(sdata, 355 "AP VHT information is invalid, disabling VHT\n"); 356 ret = IEEE80211_CONN_DISABLE_VHT; 357 goto out; 358 } 359 360 if (!cfg80211_chandef_valid(&vht_chandef)) { 361 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 362 sdata_info(sdata, 363 "AP VHT information is invalid, disabling VHT\n"); 364 ret = IEEE80211_CONN_DISABLE_VHT; 365 goto out; 366 } 367 368 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 369 ret = 0; 370 goto out; 371 } 372 373 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 374 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 375 sdata_info(sdata, 376 "AP VHT information doesn't match HT, disabling VHT\n"); 377 ret = IEEE80211_CONN_DISABLE_VHT; 378 goto out; 379 } 380 381 *chandef = vht_chandef; 382 383 /* 384 * handle the case that the EHT operation indicates that it holds EHT 385 * operation information (in case that the channel width differs from 386 * the channel width reported in HT/VHT/HE). 387 */ 388 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 389 struct cfg80211_chan_def eht_chandef = *chandef; 390 391 ieee80211_chandef_eht_oper(eht_oper, 392 eht_chandef.width == 393 NL80211_CHAN_WIDTH_160, 394 false, &eht_chandef); 395 396 if (!cfg80211_chandef_valid(&eht_chandef)) { 397 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 398 sdata_info(sdata, 399 "AP EHT information is invalid, disabling EHT\n"); 400 ret = IEEE80211_CONN_DISABLE_EHT; 401 goto out; 402 } 403 404 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 405 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 406 sdata_info(sdata, 407 "AP EHT information is incompatible, disabling EHT\n"); 408 ret = IEEE80211_CONN_DISABLE_EHT; 409 goto out; 410 } 411 412 *chandef = eht_chandef; 413 } 414 415 ret = 0; 416 417 out: 418 /* 419 * When tracking the current AP, don't do any further checks if the 420 * new chandef is identical to the one we're currently using for the 421 * connection. This keeps us from playing ping-pong with regulatory, 422 * without it the following can happen (for example): 423 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 424 * - AP advertises regdom US 425 * - CRDA loads regdom US with 80 MHz prohibited (old database) 426 * - the code below detects an unsupported channel, downgrades, and 427 * we disconnect from the AP in the caller 428 * - disconnect causes CRDA to reload world regdomain and the game 429 * starts anew. 430 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 431 * 432 * It seems possible that there are still scenarios with CSA or real 433 * bandwidth changes where a this could happen, but those cases are 434 * less common and wouldn't completely prevent using the AP. 435 */ 436 if (tracking && 437 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 438 return ret; 439 440 /* don't print the message below for VHT mismatch if VHT is disabled */ 441 if (ret & IEEE80211_CONN_DISABLE_VHT) 442 vht_chandef = *chandef; 443 444 /* 445 * Ignore the DISABLED flag when we're already connected and only 446 * tracking the APs beacon for bandwidth changes - otherwise we 447 * might get disconnected here if we connect to an AP, update our 448 * regulatory information based on the AP's country IE and the 449 * information we have is wrong/outdated and disables the channel 450 * that we're actually using for the connection to the AP. 451 */ 452 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 453 tracking ? 0 : 454 IEEE80211_CHAN_DISABLED)) { 455 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 456 ret = IEEE80211_CONN_DISABLE_HT | 457 IEEE80211_CONN_DISABLE_VHT | 458 IEEE80211_CONN_DISABLE_HE | 459 IEEE80211_CONN_DISABLE_EHT; 460 break; 461 } 462 463 ret |= ieee80211_chandef_downgrade(chandef); 464 } 465 466 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 467 IEEE80211_CHAN_NO_HE)) 468 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 469 470 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 471 IEEE80211_CHAN_NO_EHT)) 472 ret |= IEEE80211_CONN_DISABLE_EHT; 473 474 if (chandef->width != vht_chandef.width && !tracking) 475 sdata_info(sdata, 476 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 477 478 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 479 return ret; 480 } 481 482 static int ieee80211_config_bw(struct ieee80211_link_data *link, 483 const struct ieee80211_ht_cap *ht_cap, 484 const struct ieee80211_vht_cap *vht_cap, 485 const struct ieee80211_ht_operation *ht_oper, 486 const struct ieee80211_vht_operation *vht_oper, 487 const struct ieee80211_he_operation *he_oper, 488 const struct ieee80211_eht_operation *eht_oper, 489 const struct ieee80211_s1g_oper_ie *s1g_oper, 490 const u8 *bssid, u64 *changed) 491 { 492 struct ieee80211_sub_if_data *sdata = link->sdata; 493 struct ieee80211_local *local = sdata->local; 494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 495 struct ieee80211_channel *chan = link->conf->chandef.chan; 496 struct ieee80211_supported_band *sband = 497 local->hw.wiphy->bands[chan->band]; 498 struct cfg80211_chan_def chandef; 499 u16 ht_opmode; 500 ieee80211_conn_flags_t flags; 501 u32 vht_cap_info = 0; 502 int ret; 503 504 /* if HT was/is disabled, don't track any bandwidth changes */ 505 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 506 return 0; 507 508 /* don't check VHT if we associated as non-VHT station */ 509 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 510 vht_oper = NULL; 511 512 /* don't check HE if we associated as non-HE station */ 513 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 514 !ieee80211_get_he_iftype_cap(sband, 515 ieee80211_vif_type_p2p(&sdata->vif))) { 516 he_oper = NULL; 517 eht_oper = NULL; 518 } 519 520 /* don't check EHT if we associated as non-EHT station */ 521 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 522 !ieee80211_get_eht_iftype_cap(sband, 523 ieee80211_vif_type_p2p(&sdata->vif))) 524 eht_oper = NULL; 525 526 /* 527 * if bss configuration changed store the new one - 528 * this may be applicable even if channel is identical 529 */ 530 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 531 if (link->conf->ht_operation_mode != ht_opmode) { 532 *changed |= BSS_CHANGED_HT; 533 link->conf->ht_operation_mode = ht_opmode; 534 } 535 536 if (vht_cap) 537 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 538 539 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 540 flags = ieee80211_determine_chantype(sdata, link, 541 link->u.mgd.conn_flags, 542 sband, chan, vht_cap_info, 543 ht_oper, vht_oper, 544 he_oper, eht_oper, 545 s1g_oper, &chandef, true); 546 547 /* 548 * Downgrade the new channel if we associated with restricted 549 * capabilities. For example, if we associated as a 20 MHz STA 550 * to a 40 MHz AP (due to regulatory, capabilities or config 551 * reasons) then switching to a 40 MHz channel now won't do us 552 * any good -- we couldn't use it with the AP. 553 */ 554 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 555 chandef.width == NL80211_CHAN_WIDTH_80P80) 556 flags |= ieee80211_chandef_downgrade(&chandef); 557 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 558 chandef.width == NL80211_CHAN_WIDTH_160) 559 flags |= ieee80211_chandef_downgrade(&chandef); 560 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 561 chandef.width > NL80211_CHAN_WIDTH_20) 562 flags |= ieee80211_chandef_downgrade(&chandef); 563 564 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 565 return 0; 566 567 link_info(link, 568 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 569 link->u.mgd.bssid, chandef.chan->center_freq, 570 chandef.chan->freq_offset, chandef.width, 571 chandef.center_freq1, chandef.freq1_offset, 572 chandef.center_freq2); 573 574 if (flags != (link->u.mgd.conn_flags & 575 (IEEE80211_CONN_DISABLE_HT | 576 IEEE80211_CONN_DISABLE_VHT | 577 IEEE80211_CONN_DISABLE_HE | 578 IEEE80211_CONN_DISABLE_EHT | 579 IEEE80211_CONN_DISABLE_40MHZ | 580 IEEE80211_CONN_DISABLE_80P80MHZ | 581 IEEE80211_CONN_DISABLE_160MHZ | 582 IEEE80211_CONN_DISABLE_320MHZ)) || 583 !cfg80211_chandef_valid(&chandef)) { 584 sdata_info(sdata, 585 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 586 link->u.mgd.bssid, flags, ifmgd->flags); 587 return -EINVAL; 588 } 589 590 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 591 592 if (ret) { 593 sdata_info(sdata, 594 "AP %pM changed bandwidth to incompatible one - disconnect\n", 595 link->u.mgd.bssid); 596 return ret; 597 } 598 599 return 0; 600 } 601 602 /* frame sending functions */ 603 604 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 605 struct sk_buff *skb, u8 ap_ht_param, 606 struct ieee80211_supported_band *sband, 607 struct ieee80211_channel *channel, 608 enum ieee80211_smps_mode smps, 609 ieee80211_conn_flags_t conn_flags) 610 { 611 u8 *pos; 612 u32 flags = channel->flags; 613 u16 cap; 614 struct ieee80211_sta_ht_cap ht_cap; 615 616 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 617 618 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 619 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 620 621 /* determine capability flags */ 622 cap = ht_cap.cap; 623 624 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 625 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 626 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 627 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 628 cap &= ~IEEE80211_HT_CAP_SGI_40; 629 } 630 break; 631 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 632 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 633 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 634 cap &= ~IEEE80211_HT_CAP_SGI_40; 635 } 636 break; 637 } 638 639 /* 640 * If 40 MHz was disabled associate as though we weren't 641 * capable of 40 MHz -- some broken APs will never fall 642 * back to trying to transmit in 20 MHz. 643 */ 644 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 645 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 646 cap &= ~IEEE80211_HT_CAP_SGI_40; 647 } 648 649 /* set SM PS mode properly */ 650 cap &= ~IEEE80211_HT_CAP_SM_PS; 651 switch (smps) { 652 case IEEE80211_SMPS_AUTOMATIC: 653 case IEEE80211_SMPS_NUM_MODES: 654 WARN_ON(1); 655 fallthrough; 656 case IEEE80211_SMPS_OFF: 657 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 658 IEEE80211_HT_CAP_SM_PS_SHIFT; 659 break; 660 case IEEE80211_SMPS_STATIC: 661 cap |= WLAN_HT_CAP_SM_PS_STATIC << 662 IEEE80211_HT_CAP_SM_PS_SHIFT; 663 break; 664 case IEEE80211_SMPS_DYNAMIC: 665 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 666 IEEE80211_HT_CAP_SM_PS_SHIFT; 667 break; 668 } 669 670 /* reserve and fill IE */ 671 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 672 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 673 } 674 675 /* This function determines vht capability flags for the association 676 * and builds the IE. 677 * Note - the function returns true to own the MU-MIMO capability 678 */ 679 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 680 struct sk_buff *skb, 681 struct ieee80211_supported_band *sband, 682 struct ieee80211_vht_cap *ap_vht_cap, 683 ieee80211_conn_flags_t conn_flags) 684 { 685 struct ieee80211_local *local = sdata->local; 686 u8 *pos; 687 u32 cap; 688 struct ieee80211_sta_vht_cap vht_cap; 689 u32 mask, ap_bf_sts, our_bf_sts; 690 bool mu_mimo_owner = false; 691 692 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 693 694 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 695 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 696 697 /* determine capability flags */ 698 cap = vht_cap.cap; 699 700 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 701 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 702 703 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 704 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 705 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 706 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 707 } 708 709 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 710 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 711 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 712 } 713 714 /* 715 * Some APs apparently get confused if our capabilities are better 716 * than theirs, so restrict what we advertise in the assoc request. 717 */ 718 if (!(ap_vht_cap->vht_cap_info & 719 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 720 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 721 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 722 else if (!(ap_vht_cap->vht_cap_info & 723 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 724 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 725 726 /* 727 * If some other vif is using the MU-MIMO capability we cannot associate 728 * using MU-MIMO - this will lead to contradictions in the group-id 729 * mechanism. 730 * Ownership is defined since association request, in order to avoid 731 * simultaneous associations with MU-MIMO. 732 */ 733 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 734 bool disable_mu_mimo = false; 735 struct ieee80211_sub_if_data *other; 736 737 list_for_each_entry_rcu(other, &local->interfaces, list) { 738 if (other->vif.bss_conf.mu_mimo_owner) { 739 disable_mu_mimo = true; 740 break; 741 } 742 } 743 if (disable_mu_mimo) 744 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 745 else 746 mu_mimo_owner = true; 747 } 748 749 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 750 751 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 752 our_bf_sts = cap & mask; 753 754 if (ap_bf_sts < our_bf_sts) { 755 cap &= ~mask; 756 cap |= ap_bf_sts; 757 } 758 759 /* reserve and fill IE */ 760 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 761 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 762 763 return mu_mimo_owner; 764 } 765 766 /* This function determines HE capability flags for the association 767 * and builds the IE. 768 */ 769 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 770 struct sk_buff *skb, 771 struct ieee80211_supported_band *sband, 772 enum ieee80211_smps_mode smps_mode, 773 ieee80211_conn_flags_t conn_flags) 774 { 775 u8 *pos, *pre_he_pos; 776 const struct ieee80211_sta_he_cap *he_cap; 777 u8 he_cap_size; 778 779 he_cap = ieee80211_get_he_iftype_cap(sband, 780 ieee80211_vif_type_p2p(&sdata->vif)); 781 if (WARN_ON(!he_cap)) 782 return; 783 784 /* get a max size estimate */ 785 he_cap_size = 786 2 + 1 + sizeof(he_cap->he_cap_elem) + 787 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 788 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 789 he_cap->he_cap_elem.phy_cap_info); 790 pos = skb_put(skb, he_cap_size); 791 pre_he_pos = pos; 792 pos = ieee80211_ie_build_he_cap(conn_flags, 793 pos, he_cap, pos + he_cap_size); 794 /* trim excess if any */ 795 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 796 797 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 798 } 799 800 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 801 struct sk_buff *skb, 802 struct ieee80211_supported_band *sband) 803 { 804 u8 *pos; 805 const struct ieee80211_sta_he_cap *he_cap; 806 const struct ieee80211_sta_eht_cap *eht_cap; 807 u8 eht_cap_size; 808 809 he_cap = ieee80211_get_he_iftype_cap(sband, 810 ieee80211_vif_type_p2p(&sdata->vif)); 811 eht_cap = ieee80211_get_eht_iftype_cap(sband, 812 ieee80211_vif_type_p2p(&sdata->vif)); 813 814 /* 815 * EHT capabilities element is only added if the HE capabilities element 816 * was added so assume that 'he_cap' is valid and don't check it. 817 */ 818 if (WARN_ON(!he_cap || !eht_cap)) 819 return; 820 821 eht_cap_size = 822 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 823 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 824 &eht_cap->eht_cap_elem, 825 false) + 826 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 827 eht_cap->eht_cap_elem.phy_cap_info); 828 pos = skb_put(skb, eht_cap_size); 829 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 830 false); 831 } 832 833 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 834 enum nl80211_chan_width width, 835 struct ieee80211_supported_band *sband, 836 struct ieee80211_mgd_assoc_data *assoc_data) 837 { 838 unsigned int shift = ieee80211_chanwidth_get_shift(width); 839 unsigned int rates_len, supp_rates_len; 840 u32 rates = 0; 841 int i, count; 842 u8 *pos; 843 844 if (assoc_data->supp_rates_len) { 845 /* 846 * Get all rates supported by the device and the AP as 847 * some APs don't like getting a superset of their rates 848 * in the association request (e.g. D-Link DAP 1353 in 849 * b-only mode)... 850 */ 851 rates_len = ieee80211_parse_bitrates(width, sband, 852 assoc_data->supp_rates, 853 assoc_data->supp_rates_len, 854 &rates); 855 } else { 856 /* 857 * In case AP not provide any supported rates information 858 * before association, we send information element(s) with 859 * all rates that we support. 860 */ 861 rates_len = sband->n_bitrates; 862 for (i = 0; i < sband->n_bitrates; i++) 863 rates |= BIT(i); 864 } 865 866 supp_rates_len = rates_len; 867 if (supp_rates_len > 8) 868 supp_rates_len = 8; 869 870 pos = skb_put(skb, supp_rates_len + 2); 871 *pos++ = WLAN_EID_SUPP_RATES; 872 *pos++ = supp_rates_len; 873 874 count = 0; 875 for (i = 0; i < sband->n_bitrates; i++) { 876 if (BIT(i) & rates) { 877 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 878 5 * (1 << shift)); 879 *pos++ = (u8)rate; 880 if (++count == 8) 881 break; 882 } 883 } 884 885 if (rates_len > count) { 886 pos = skb_put(skb, rates_len - count + 2); 887 *pos++ = WLAN_EID_EXT_SUPP_RATES; 888 *pos++ = rates_len - count; 889 890 for (i++; i < sband->n_bitrates; i++) { 891 if (BIT(i) & rates) { 892 int rate; 893 894 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 895 5 * (1 << shift)); 896 *pos++ = (u8)rate; 897 } 898 } 899 } 900 } 901 902 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 903 const u8 *elems, 904 size_t elems_len, 905 size_t offset) 906 { 907 size_t noffset; 908 909 static const u8 before_ht[] = { 910 WLAN_EID_SSID, 911 WLAN_EID_SUPP_RATES, 912 WLAN_EID_EXT_SUPP_RATES, 913 WLAN_EID_PWR_CAPABILITY, 914 WLAN_EID_SUPPORTED_CHANNELS, 915 WLAN_EID_RSN, 916 WLAN_EID_QOS_CAPA, 917 WLAN_EID_RRM_ENABLED_CAPABILITIES, 918 WLAN_EID_MOBILITY_DOMAIN, 919 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 920 WLAN_EID_RIC_DATA, /* reassoc only */ 921 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 922 }; 923 static const u8 after_ric[] = { 924 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 925 WLAN_EID_HT_CAPABILITY, 926 WLAN_EID_BSS_COEX_2040, 927 /* luckily this is almost always there */ 928 WLAN_EID_EXT_CAPABILITY, 929 WLAN_EID_QOS_TRAFFIC_CAPA, 930 WLAN_EID_TIM_BCAST_REQ, 931 WLAN_EID_INTERWORKING, 932 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 933 WLAN_EID_VHT_CAPABILITY, 934 WLAN_EID_OPMODE_NOTIF, 935 }; 936 937 if (!elems_len) 938 return offset; 939 940 noffset = ieee80211_ie_split_ric(elems, elems_len, 941 before_ht, 942 ARRAY_SIZE(before_ht), 943 after_ric, 944 ARRAY_SIZE(after_ric), 945 offset); 946 skb_put_data(skb, elems + offset, noffset - offset); 947 948 return noffset; 949 } 950 951 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 952 const u8 *elems, 953 size_t elems_len, 954 size_t offset) 955 { 956 static const u8 before_vht[] = { 957 /* 958 * no need to list the ones split off before HT 959 * or generated here 960 */ 961 WLAN_EID_BSS_COEX_2040, 962 WLAN_EID_EXT_CAPABILITY, 963 WLAN_EID_QOS_TRAFFIC_CAPA, 964 WLAN_EID_TIM_BCAST_REQ, 965 WLAN_EID_INTERWORKING, 966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 967 }; 968 size_t noffset; 969 970 if (!elems_len) 971 return offset; 972 973 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 974 noffset = ieee80211_ie_split(elems, elems_len, 975 before_vht, ARRAY_SIZE(before_vht), 976 offset); 977 skb_put_data(skb, elems + offset, noffset - offset); 978 979 return noffset; 980 } 981 982 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 983 const u8 *elems, 984 size_t elems_len, 985 size_t offset) 986 { 987 static const u8 before_he[] = { 988 /* 989 * no need to list the ones split off before VHT 990 * or generated here 991 */ 992 WLAN_EID_OPMODE_NOTIF, 993 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 994 /* 11ai elements */ 995 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 996 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 998 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 999 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1000 /* TODO: add 11ah/11aj/11ak elements */ 1001 }; 1002 size_t noffset; 1003 1004 if (!elems_len) 1005 return offset; 1006 1007 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1008 noffset = ieee80211_ie_split(elems, elems_len, 1009 before_he, ARRAY_SIZE(before_he), 1010 offset); 1011 skb_put_data(skb, elems + offset, noffset - offset); 1012 1013 return noffset; 1014 } 1015 1016 #define PRESENT_ELEMS_MAX 8 1017 #define PRESENT_ELEM_EXT_OFFS 0x100 1018 1019 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1020 struct sk_buff *skb, u16 capab, 1021 const struct element *ext_capa, 1022 const u16 *present_elems); 1023 1024 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1025 struct sk_buff *skb, u16 *capab, 1026 const struct element *ext_capa, 1027 const u8 *extra_elems, 1028 size_t extra_elems_len, 1029 unsigned int link_id, 1030 struct ieee80211_link_data *link, 1031 u16 *present_elems) 1032 { 1033 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1035 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1036 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1037 struct ieee80211_channel *chan = cbss->channel; 1038 const struct ieee80211_sband_iftype_data *iftd; 1039 struct ieee80211_local *local = sdata->local; 1040 struct ieee80211_supported_band *sband; 1041 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1042 struct ieee80211_chanctx_conf *chanctx_conf; 1043 enum ieee80211_smps_mode smps_mode; 1044 u16 orig_capab = *capab; 1045 size_t offset = 0; 1046 int present_elems_len = 0; 1047 u8 *pos; 1048 int i; 1049 1050 #define ADD_PRESENT_ELEM(id) do { \ 1051 /* need a last for termination - we use 0 == SSID */ \ 1052 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1053 present_elems[present_elems_len++] = (id); \ 1054 } while (0) 1055 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1056 1057 if (link) 1058 smps_mode = link->smps_mode; 1059 else if (sdata->u.mgd.powersave) 1060 smps_mode = IEEE80211_SMPS_DYNAMIC; 1061 else 1062 smps_mode = IEEE80211_SMPS_OFF; 1063 1064 if (link) { 1065 /* 1066 * 5/10 MHz scenarios are only viable without MLO, in which 1067 * case this pointer should be used ... All of this is a bit 1068 * unclear though, not sure this even works at all. 1069 */ 1070 rcu_read_lock(); 1071 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1072 if (chanctx_conf) 1073 width = chanctx_conf->def.width; 1074 rcu_read_unlock(); 1075 } 1076 1077 sband = local->hw.wiphy->bands[chan->band]; 1078 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1079 1080 if (sband->band == NL80211_BAND_2GHZ) { 1081 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1082 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1083 } 1084 1085 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1086 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1087 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1088 1089 if (sband->band != NL80211_BAND_S1GHZ) 1090 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1091 1092 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1093 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1094 struct cfg80211_chan_def chandef = { 1095 .width = width, 1096 .chan = chan, 1097 }; 1098 1099 pos = skb_put(skb, 4); 1100 *pos++ = WLAN_EID_PWR_CAPABILITY; 1101 *pos++ = 2; 1102 *pos++ = 0; /* min tx power */ 1103 /* max tx power */ 1104 *pos++ = ieee80211_chandef_max_power(&chandef); 1105 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1106 } 1107 1108 /* 1109 * Per spec, we shouldn't include the list of channels if we advertise 1110 * support for extended channel switching, but we've always done that; 1111 * (for now?) apply this restriction only on the (new) 6 GHz band. 1112 */ 1113 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1114 (sband->band != NL80211_BAND_6GHZ || 1115 !ext_capa || ext_capa->datalen < 1 || 1116 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1117 /* TODO: get this in reg domain format */ 1118 pos = skb_put(skb, 2 * sband->n_channels + 2); 1119 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1120 *pos++ = 2 * sband->n_channels; 1121 for (i = 0; i < sband->n_channels; i++) { 1122 int cf = sband->channels[i].center_freq; 1123 1124 *pos++ = ieee80211_frequency_to_channel(cf); 1125 *pos++ = 1; /* one channel in the subband*/ 1126 } 1127 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1128 } 1129 1130 /* if present, add any custom IEs that go before HT */ 1131 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1132 extra_elems_len, 1133 offset); 1134 1135 if (sband->band != NL80211_BAND_6GHZ && 1136 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1137 ieee80211_add_ht_ie(sdata, skb, 1138 assoc_data->link[link_id].ap_ht_param, 1139 sband, chan, smps_mode, 1140 assoc_data->link[link_id].conn_flags); 1141 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1142 } 1143 1144 /* if present, add any custom IEs that go before VHT */ 1145 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1146 extra_elems_len, 1147 offset); 1148 1149 if (sband->band != NL80211_BAND_6GHZ && 1150 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1151 bool mu_mimo_owner = 1152 ieee80211_add_vht_ie(sdata, skb, sband, 1153 &assoc_data->link[link_id].ap_vht_cap, 1154 assoc_data->link[link_id].conn_flags); 1155 1156 if (link) 1157 link->conf->mu_mimo_owner = mu_mimo_owner; 1158 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1159 } 1160 1161 /* 1162 * If AP doesn't support HT, mark HE and EHT as disabled. 1163 * If on the 5GHz band, make sure it supports VHT. 1164 */ 1165 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1166 (sband->band == NL80211_BAND_5GHZ && 1167 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1168 assoc_data->link[link_id].conn_flags |= 1169 IEEE80211_CONN_DISABLE_HE | 1170 IEEE80211_CONN_DISABLE_EHT; 1171 1172 /* if present, add any custom IEs that go before HE */ 1173 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1174 extra_elems_len, 1175 offset); 1176 1177 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1178 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1179 assoc_data->link[link_id].conn_flags); 1180 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1181 } 1182 1183 /* 1184 * careful - need to know about all the present elems before 1185 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1186 * we're going to put it after the ML element 1187 */ 1188 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1189 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1190 1191 if (link_id == assoc_data->assoc_link_id) 1192 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1193 present_elems); 1194 1195 /* crash if somebody gets it wrong */ 1196 present_elems = NULL; 1197 1198 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1199 ieee80211_add_eht_ie(sdata, skb, sband); 1200 1201 if (sband->band == NL80211_BAND_S1GHZ) { 1202 ieee80211_add_aid_request_ie(sdata, skb); 1203 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1204 } 1205 1206 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1207 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1208 1209 if (link) 1210 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1211 1212 return offset; 1213 } 1214 1215 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1216 const u16 *outer, 1217 const u16 *inner) 1218 { 1219 unsigned int skb_len = skb->len; 1220 bool at_extension = false; 1221 bool added = false; 1222 int i, j; 1223 u8 *len, *list_len = NULL; 1224 1225 skb_put_u8(skb, WLAN_EID_EXTENSION); 1226 len = skb_put(skb, 1); 1227 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1228 1229 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1230 u16 elem = outer[i]; 1231 bool have_inner = false; 1232 1233 /* should at least be sorted in the sense of normal -> ext */ 1234 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1235 1236 /* switch to extension list */ 1237 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1238 at_extension = true; 1239 if (!list_len) 1240 skb_put_u8(skb, 0); 1241 list_len = NULL; 1242 } 1243 1244 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1245 if (elem == inner[j]) { 1246 have_inner = true; 1247 break; 1248 } 1249 } 1250 1251 if (have_inner) 1252 continue; 1253 1254 if (!list_len) { 1255 list_len = skb_put(skb, 1); 1256 *list_len = 0; 1257 } 1258 *list_len += 1; 1259 skb_put_u8(skb, (u8)elem); 1260 added = true; 1261 } 1262 1263 /* if we added a list but no extension list, make a zero-len one */ 1264 if (added && (!at_extension || !list_len)) 1265 skb_put_u8(skb, 0); 1266 1267 /* if nothing added remove extension element completely */ 1268 if (!added) 1269 skb_trim(skb, skb_len); 1270 else 1271 *len = skb->len - skb_len - 2; 1272 } 1273 1274 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1275 struct sk_buff *skb, u16 capab, 1276 const struct element *ext_capa, 1277 const u16 *outer_present_elems) 1278 { 1279 struct ieee80211_local *local = sdata->local; 1280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1281 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1282 struct ieee80211_multi_link_elem *ml_elem; 1283 struct ieee80211_mle_basic_common_info *common; 1284 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1285 __le16 eml_capa = 0, mld_capa_ops = 0; 1286 unsigned int link_id; 1287 u8 *ml_elem_len; 1288 void *capab_pos; 1289 1290 if (!sdata->vif.valid_links) 1291 return; 1292 1293 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1294 ieee80211_vif_type_p2p(&sdata->vif)); 1295 if (ift_ext_capa) { 1296 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1297 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1298 } 1299 1300 skb_put_u8(skb, WLAN_EID_EXTENSION); 1301 ml_elem_len = skb_put(skb, 1); 1302 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1303 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1304 ml_elem->control = 1305 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1306 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1307 common = skb_put(skb, sizeof(*common)); 1308 common->len = sizeof(*common) + 1309 2; /* MLD capa/ops */ 1310 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1311 1312 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1313 if (eml_capa & 1314 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1315 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1316 common->len += 2; /* EML capabilities */ 1317 ml_elem->control |= 1318 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1319 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1320 } 1321 /* need indication from userspace to support this */ 1322 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1323 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1324 1325 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1326 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1327 const u8 *extra_elems; 1328 size_t extra_elems_len; 1329 size_t extra_used; 1330 u8 *subelem_len = NULL; 1331 __le16 ctrl; 1332 1333 if (!assoc_data->link[link_id].bss || 1334 link_id == assoc_data->assoc_link_id) 1335 continue; 1336 1337 extra_elems = assoc_data->link[link_id].elems; 1338 extra_elems_len = assoc_data->link[link_id].elems_len; 1339 1340 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1341 subelem_len = skb_put(skb, 1); 1342 1343 ctrl = cpu_to_le16(link_id | 1344 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1345 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1346 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1347 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1348 skb_put_data(skb, assoc_data->link[link_id].addr, 1349 ETH_ALEN); 1350 /* 1351 * Now add the contents of the (re)association request, 1352 * but the "listen interval" and "current AP address" 1353 * (if applicable) are skipped. So we only have 1354 * the capability field (remember the position and fill 1355 * later), followed by the elements added below by 1356 * calling ieee80211_assoc_link_elems(). 1357 */ 1358 capab_pos = skb_put(skb, 2); 1359 1360 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1361 ext_capa, 1362 extra_elems, 1363 extra_elems_len, 1364 link_id, NULL, 1365 link_present_elems); 1366 if (extra_elems) 1367 skb_put_data(skb, extra_elems + extra_used, 1368 extra_elems_len - extra_used); 1369 1370 put_unaligned_le16(capab, capab_pos); 1371 1372 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1373 link_present_elems); 1374 1375 ieee80211_fragment_element(skb, subelem_len); 1376 } 1377 1378 ieee80211_fragment_element(skb, ml_elem_len); 1379 } 1380 1381 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1382 { 1383 struct ieee80211_local *local = sdata->local; 1384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1385 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1386 struct ieee80211_link_data *link; 1387 struct sk_buff *skb; 1388 struct ieee80211_mgmt *mgmt; 1389 u8 *pos, qos_info, *ie_start; 1390 size_t offset, noffset; 1391 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1392 __le16 listen_int; 1393 struct element *ext_capa = NULL; 1394 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1395 struct ieee80211_prep_tx_info info = {}; 1396 unsigned int link_id, n_links = 0; 1397 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1398 void *capab_pos; 1399 size_t size; 1400 int ret; 1401 1402 /* we know it's writable, cast away the const */ 1403 if (assoc_data->ie_len) 1404 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1405 assoc_data->ie, 1406 assoc_data->ie_len); 1407 1408 sdata_assert_lock(sdata); 1409 1410 size = local->hw.extra_tx_headroom + 1411 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1412 2 + assoc_data->ssid_len + /* SSID */ 1413 assoc_data->ie_len + /* extra IEs */ 1414 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1415 9; /* WMM */ 1416 1417 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1418 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1419 const struct ieee80211_sband_iftype_data *iftd; 1420 struct ieee80211_supported_band *sband; 1421 1422 if (!cbss) 1423 continue; 1424 1425 sband = local->hw.wiphy->bands[cbss->channel->band]; 1426 1427 n_links++; 1428 /* add STA profile elements length */ 1429 size += assoc_data->link[link_id].elems_len; 1430 /* and supported rates length */ 1431 size += 4 + sband->n_bitrates; 1432 /* supported channels */ 1433 size += 2 + 2 * sband->n_channels; 1434 1435 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1436 if (iftd) 1437 size += iftd->vendor_elems.len; 1438 1439 /* power capability */ 1440 size += 4; 1441 1442 /* HT, VHT, HE, EHT */ 1443 size += 2 + sizeof(struct ieee80211_ht_cap); 1444 size += 2 + sizeof(struct ieee80211_vht_cap); 1445 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1446 sizeof(struct ieee80211_he_mcs_nss_supp) + 1447 IEEE80211_HE_PPE_THRES_MAX_LEN; 1448 1449 if (sband->band == NL80211_BAND_6GHZ) 1450 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1451 1452 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1453 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1454 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1455 1456 /* non-inheritance element */ 1457 size += 2 + 2 + PRESENT_ELEMS_MAX; 1458 1459 /* should be the same across all BSSes */ 1460 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1461 capab |= WLAN_CAPABILITY_PRIVACY; 1462 } 1463 1464 if (sdata->vif.valid_links) { 1465 /* consider the multi-link element with STA profile */ 1466 size += sizeof(struct ieee80211_multi_link_elem); 1467 /* max common info field in basic multi-link element */ 1468 size += sizeof(struct ieee80211_mle_basic_common_info) + 1469 2 + /* capa & op */ 1470 2; /* EML capa */ 1471 1472 /* 1473 * The capability elements were already considered above; 1474 * note this over-estimates a bit because there's no 1475 * STA profile for the assoc link. 1476 */ 1477 size += (n_links - 1) * 1478 (1 + 1 + /* subelement ID/length */ 1479 2 + /* STA control */ 1480 1 + ETH_ALEN + 2 /* STA Info field */); 1481 } 1482 1483 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1484 if (WARN_ON(!link)) 1485 return -EINVAL; 1486 1487 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1488 return -EINVAL; 1489 1490 skb = alloc_skb(size, GFP_KERNEL); 1491 if (!skb) 1492 return -ENOMEM; 1493 1494 skb_reserve(skb, local->hw.extra_tx_headroom); 1495 1496 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1497 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1498 1499 /* Set MBSSID support for HE AP if needed */ 1500 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1501 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1502 ext_capa && ext_capa->datalen >= 3) 1503 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1504 1505 mgmt = skb_put_zero(skb, 24); 1506 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1507 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1508 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1509 1510 listen_int = cpu_to_le16(assoc_data->s1g ? 1511 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1512 local->hw.conf.listen_interval); 1513 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1514 skb_put(skb, 10); 1515 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1516 IEEE80211_STYPE_REASSOC_REQ); 1517 capab_pos = &mgmt->u.reassoc_req.capab_info; 1518 mgmt->u.reassoc_req.listen_interval = listen_int; 1519 memcpy(mgmt->u.reassoc_req.current_ap, 1520 assoc_data->prev_ap_addr, ETH_ALEN); 1521 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1522 } else { 1523 skb_put(skb, 4); 1524 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1525 IEEE80211_STYPE_ASSOC_REQ); 1526 capab_pos = &mgmt->u.assoc_req.capab_info; 1527 mgmt->u.assoc_req.listen_interval = listen_int; 1528 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1529 } 1530 1531 /* SSID */ 1532 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1533 ie_start = pos; 1534 *pos++ = WLAN_EID_SSID; 1535 *pos++ = assoc_data->ssid_len; 1536 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1537 1538 /* add the elements for the assoc (main) link */ 1539 link_capab = capab; 1540 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1541 ext_capa, 1542 assoc_data->ie, 1543 assoc_data->ie_len, 1544 assoc_data->assoc_link_id, link, 1545 present_elems); 1546 put_unaligned_le16(link_capab, capab_pos); 1547 1548 /* if present, add any custom non-vendor IEs */ 1549 if (assoc_data->ie_len) { 1550 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1551 assoc_data->ie_len, 1552 offset); 1553 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1554 offset = noffset; 1555 } 1556 1557 if (assoc_data->wmm) { 1558 if (assoc_data->uapsd) { 1559 qos_info = ifmgd->uapsd_queues; 1560 qos_info |= (ifmgd->uapsd_max_sp_len << 1561 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1562 } else { 1563 qos_info = 0; 1564 } 1565 1566 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1567 } 1568 1569 /* add any remaining custom (i.e. vendor specific here) IEs */ 1570 if (assoc_data->ie_len) { 1571 noffset = assoc_data->ie_len; 1572 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1573 } 1574 1575 if (assoc_data->fils_kek_len) { 1576 ret = fils_encrypt_assoc_req(skb, assoc_data); 1577 if (ret < 0) { 1578 dev_kfree_skb(skb); 1579 return ret; 1580 } 1581 } 1582 1583 pos = skb_tail_pointer(skb); 1584 kfree(ifmgd->assoc_req_ies); 1585 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1586 if (!ifmgd->assoc_req_ies) { 1587 dev_kfree_skb(skb); 1588 return -ENOMEM; 1589 } 1590 1591 ifmgd->assoc_req_ies_len = pos - ie_start; 1592 1593 drv_mgd_prepare_tx(local, sdata, &info); 1594 1595 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1596 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1597 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1598 IEEE80211_TX_INTFL_MLME_CONN_TX; 1599 ieee80211_tx_skb(sdata, skb); 1600 1601 return 0; 1602 } 1603 1604 void ieee80211_send_pspoll(struct ieee80211_local *local, 1605 struct ieee80211_sub_if_data *sdata) 1606 { 1607 struct ieee80211_pspoll *pspoll; 1608 struct sk_buff *skb; 1609 1610 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1611 if (!skb) 1612 return; 1613 1614 pspoll = (struct ieee80211_pspoll *) skb->data; 1615 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1616 1617 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1618 ieee80211_tx_skb(sdata, skb); 1619 } 1620 1621 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1622 struct ieee80211_sub_if_data *sdata, 1623 bool powersave) 1624 { 1625 struct sk_buff *skb; 1626 struct ieee80211_hdr_3addr *nullfunc; 1627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1628 1629 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1630 !ieee80211_hw_check(&local->hw, 1631 DOESNT_SUPPORT_QOS_NDP)); 1632 if (!skb) 1633 return; 1634 1635 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1636 if (powersave) 1637 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1638 1639 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1640 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1641 1642 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1643 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1644 1645 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1646 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1647 1648 ieee80211_tx_skb(sdata, skb); 1649 } 1650 1651 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1652 struct ieee80211_sub_if_data *sdata) 1653 { 1654 struct sk_buff *skb; 1655 struct ieee80211_hdr *nullfunc; 1656 __le16 fc; 1657 1658 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1659 return; 1660 1661 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1662 if (!skb) 1663 return; 1664 1665 skb_reserve(skb, local->hw.extra_tx_headroom); 1666 1667 nullfunc = skb_put_zero(skb, 30); 1668 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1669 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1670 nullfunc->frame_control = fc; 1671 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1672 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1673 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1674 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1675 1676 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1677 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1678 ieee80211_tx_skb(sdata, skb); 1679 } 1680 1681 /* spectrum management related things */ 1682 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1683 struct wiphy_work *work) 1684 { 1685 struct ieee80211_link_data *link = 1686 container_of(work, struct ieee80211_link_data, 1687 u.mgd.chswitch_work.work); 1688 struct ieee80211_sub_if_data *sdata = link->sdata; 1689 struct ieee80211_local *local = sdata->local; 1690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1691 int ret; 1692 1693 if (!ieee80211_sdata_running(sdata)) 1694 return; 1695 1696 sdata_lock(sdata); 1697 mutex_lock(&local->mtx); 1698 mutex_lock(&local->chanctx_mtx); 1699 1700 if (!ifmgd->associated) 1701 goto out; 1702 1703 if (!link->conf->csa_active) 1704 goto out; 1705 1706 /* 1707 * using reservation isn't immediate as it may be deferred until later 1708 * with multi-vif. once reservation is complete it will re-schedule the 1709 * work with no reserved_chanctx so verify chandef to check if it 1710 * completed successfully 1711 */ 1712 1713 if (link->reserved_chanctx) { 1714 /* 1715 * with multi-vif csa driver may call ieee80211_csa_finish() 1716 * many times while waiting for other interfaces to use their 1717 * reservations 1718 */ 1719 if (link->reserved_ready) 1720 goto out; 1721 1722 ret = ieee80211_link_use_reserved_context(link); 1723 if (ret) { 1724 sdata_info(sdata, 1725 "failed to use reserved channel context, disconnecting (err=%d)\n", 1726 ret); 1727 wiphy_work_queue(sdata->local->hw.wiphy, 1728 &ifmgd->csa_connection_drop_work); 1729 goto out; 1730 } 1731 1732 goto out; 1733 } 1734 1735 if (!cfg80211_chandef_identical(&link->conf->chandef, 1736 &link->csa_chandef)) { 1737 sdata_info(sdata, 1738 "failed to finalize channel switch, disconnecting\n"); 1739 wiphy_work_queue(sdata->local->hw.wiphy, 1740 &ifmgd->csa_connection_drop_work); 1741 goto out; 1742 } 1743 1744 link->u.mgd.csa_waiting_bcn = true; 1745 1746 ieee80211_sta_reset_beacon_monitor(sdata); 1747 ieee80211_sta_reset_conn_monitor(sdata); 1748 1749 out: 1750 mutex_unlock(&local->chanctx_mtx); 1751 mutex_unlock(&local->mtx); 1752 sdata_unlock(sdata); 1753 } 1754 1755 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1756 { 1757 struct ieee80211_sub_if_data *sdata = link->sdata; 1758 struct ieee80211_local *local = sdata->local; 1759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1760 int ret; 1761 1762 sdata_assert_lock(sdata); 1763 1764 WARN_ON(!link->conf->csa_active); 1765 1766 if (link->csa_block_tx) { 1767 ieee80211_wake_vif_queues(local, sdata, 1768 IEEE80211_QUEUE_STOP_REASON_CSA); 1769 link->csa_block_tx = false; 1770 } 1771 1772 link->conf->csa_active = false; 1773 link->u.mgd.csa_waiting_bcn = false; 1774 /* 1775 * If the CSA IE is still present on the beacon after the switch, 1776 * we need to consider it as a new CSA (possibly to self). 1777 */ 1778 link->u.mgd.beacon_crc_valid = false; 1779 1780 ret = drv_post_channel_switch(sdata); 1781 if (ret) { 1782 sdata_info(sdata, 1783 "driver post channel switch failed, disconnecting\n"); 1784 wiphy_work_queue(sdata->local->hw.wiphy, 1785 &ifmgd->csa_connection_drop_work); 1786 return; 1787 } 1788 1789 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0, 0); 1790 } 1791 1792 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1793 { 1794 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1796 1797 if (WARN_ON(sdata->vif.valid_links)) 1798 success = false; 1799 1800 trace_api_chswitch_done(sdata, success); 1801 if (!success) { 1802 sdata_info(sdata, 1803 "driver channel switch failed, disconnecting\n"); 1804 wiphy_work_queue(sdata->local->hw.wiphy, 1805 &ifmgd->csa_connection_drop_work); 1806 } else { 1807 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1808 &sdata->deflink.u.mgd.chswitch_work, 1809 0); 1810 } 1811 } 1812 EXPORT_SYMBOL(ieee80211_chswitch_done); 1813 1814 static void 1815 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1816 { 1817 struct ieee80211_sub_if_data *sdata = link->sdata; 1818 struct ieee80211_local *local = sdata->local; 1819 1820 if (!local->ops->abort_channel_switch) 1821 return; 1822 1823 mutex_lock(&local->mtx); 1824 1825 mutex_lock(&local->chanctx_mtx); 1826 ieee80211_link_unreserve_chanctx(link); 1827 mutex_unlock(&local->chanctx_mtx); 1828 1829 if (link->csa_block_tx) 1830 ieee80211_wake_vif_queues(local, sdata, 1831 IEEE80211_QUEUE_STOP_REASON_CSA); 1832 1833 link->csa_block_tx = false; 1834 link->conf->csa_active = false; 1835 1836 mutex_unlock(&local->mtx); 1837 1838 drv_abort_channel_switch(sdata); 1839 } 1840 1841 static void 1842 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1843 u64 timestamp, u32 device_timestamp, 1844 struct ieee802_11_elems *elems, 1845 bool beacon) 1846 { 1847 struct ieee80211_sub_if_data *sdata = link->sdata; 1848 struct ieee80211_local *local = sdata->local; 1849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1850 struct cfg80211_bss *cbss = link->u.mgd.bss; 1851 struct ieee80211_chanctx_conf *conf; 1852 struct ieee80211_chanctx *chanctx; 1853 enum nl80211_band current_band; 1854 struct ieee80211_csa_ie csa_ie; 1855 struct ieee80211_channel_switch ch_switch; 1856 struct ieee80211_bss *bss; 1857 unsigned long timeout; 1858 int res; 1859 1860 sdata_assert_lock(sdata); 1861 1862 if (!cbss) 1863 return; 1864 1865 if (local->scanning) 1866 return; 1867 1868 current_band = cbss->channel->band; 1869 bss = (void *)cbss->priv; 1870 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1871 bss->vht_cap_info, 1872 link->u.mgd.conn_flags, 1873 link->u.mgd.bssid, &csa_ie); 1874 1875 if (!res) { 1876 ch_switch.timestamp = timestamp; 1877 ch_switch.device_timestamp = device_timestamp; 1878 ch_switch.block_tx = csa_ie.mode; 1879 ch_switch.chandef = csa_ie.chandef; 1880 ch_switch.count = csa_ie.count; 1881 ch_switch.delay = csa_ie.max_switch_time; 1882 } 1883 1884 if (res < 0) 1885 goto lock_and_drop_connection; 1886 1887 if (beacon && link->conf->csa_active && 1888 !link->u.mgd.csa_waiting_bcn) { 1889 if (res) 1890 ieee80211_sta_abort_chanswitch(link); 1891 else 1892 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1893 return; 1894 } else if (link->conf->csa_active || res) { 1895 /* disregard subsequent announcements if already processing */ 1896 return; 1897 } 1898 1899 if (link->conf->chandef.chan->band != 1900 csa_ie.chandef.chan->band) { 1901 sdata_info(sdata, 1902 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1903 link->u.mgd.bssid, 1904 csa_ie.chandef.chan->center_freq, 1905 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1906 csa_ie.chandef.center_freq2); 1907 goto lock_and_drop_connection; 1908 } 1909 1910 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1911 IEEE80211_CHAN_DISABLED)) { 1912 sdata_info(sdata, 1913 "AP %pM switches to unsupported channel " 1914 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1915 "disconnecting\n", 1916 link->u.mgd.bssid, 1917 csa_ie.chandef.chan->center_freq, 1918 csa_ie.chandef.chan->freq_offset, 1919 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1920 csa_ie.chandef.freq1_offset, 1921 csa_ie.chandef.center_freq2); 1922 goto lock_and_drop_connection; 1923 } 1924 1925 if (cfg80211_chandef_identical(&csa_ie.chandef, 1926 &link->conf->chandef) && 1927 (!csa_ie.mode || !beacon)) { 1928 if (link->u.mgd.csa_ignored_same_chan) 1929 return; 1930 sdata_info(sdata, 1931 "AP %pM tries to chanswitch to same channel, ignore\n", 1932 link->u.mgd.bssid); 1933 link->u.mgd.csa_ignored_same_chan = true; 1934 return; 1935 } 1936 1937 /* 1938 * Drop all TDLS peers - either we disconnect or move to a different 1939 * channel from this point on. There's no telling what our peer will do. 1940 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1941 * have an incompatible wider chandef. 1942 */ 1943 ieee80211_teardown_tdls_peers(sdata); 1944 1945 mutex_lock(&local->mtx); 1946 mutex_lock(&local->chanctx_mtx); 1947 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1948 lockdep_is_held(&local->chanctx_mtx)); 1949 if (!conf) { 1950 sdata_info(sdata, 1951 "no channel context assigned to vif?, disconnecting\n"); 1952 goto drop_connection; 1953 } 1954 1955 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1956 1957 if (local->use_chanctx && 1958 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1959 sdata_info(sdata, 1960 "driver doesn't support chan-switch with channel contexts\n"); 1961 goto drop_connection; 1962 } 1963 1964 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1965 sdata_info(sdata, 1966 "preparing for channel switch failed, disconnecting\n"); 1967 goto drop_connection; 1968 } 1969 1970 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1971 chanctx->mode, false); 1972 if (res) { 1973 sdata_info(sdata, 1974 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1975 res); 1976 goto drop_connection; 1977 } 1978 mutex_unlock(&local->chanctx_mtx); 1979 1980 link->conf->csa_active = true; 1981 link->csa_chandef = csa_ie.chandef; 1982 link->csa_block_tx = csa_ie.mode; 1983 link->u.mgd.csa_ignored_same_chan = false; 1984 link->u.mgd.beacon_crc_valid = false; 1985 1986 if (link->csa_block_tx) 1987 ieee80211_stop_vif_queues(local, sdata, 1988 IEEE80211_QUEUE_STOP_REASON_CSA); 1989 mutex_unlock(&local->mtx); 1990 1991 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1992 csa_ie.count, csa_ie.mode, 0); 1993 1994 if (local->ops->channel_switch) { 1995 /* use driver's channel switch callback */ 1996 drv_channel_switch(local, sdata, &ch_switch); 1997 return; 1998 } 1999 2000 /* channel switch handled in software */ 2001 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2002 cbss->beacon_interval); 2003 wiphy_delayed_work_queue(local->hw.wiphy, 2004 &link->u.mgd.chswitch_work, 2005 timeout); 2006 return; 2007 lock_and_drop_connection: 2008 mutex_lock(&local->mtx); 2009 mutex_lock(&local->chanctx_mtx); 2010 drop_connection: 2011 /* 2012 * This is just so that the disconnect flow will know that 2013 * we were trying to switch channel and failed. In case the 2014 * mode is 1 (we are not allowed to Tx), we will know not to 2015 * send a deauthentication frame. Those two fields will be 2016 * reset when the disconnection worker runs. 2017 */ 2018 link->conf->csa_active = true; 2019 link->csa_block_tx = csa_ie.mode; 2020 2021 wiphy_work_queue(sdata->local->hw.wiphy, 2022 &ifmgd->csa_connection_drop_work); 2023 mutex_unlock(&local->chanctx_mtx); 2024 mutex_unlock(&local->mtx); 2025 } 2026 2027 static bool 2028 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2029 struct ieee80211_channel *channel, 2030 const u8 *country_ie, u8 country_ie_len, 2031 const u8 *pwr_constr_elem, 2032 int *chan_pwr, int *pwr_reduction) 2033 { 2034 struct ieee80211_country_ie_triplet *triplet; 2035 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2036 int i, chan_increment; 2037 bool have_chan_pwr = false; 2038 2039 /* Invalid IE */ 2040 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2041 return false; 2042 2043 triplet = (void *)(country_ie + 3); 2044 country_ie_len -= 3; 2045 2046 switch (channel->band) { 2047 default: 2048 WARN_ON_ONCE(1); 2049 fallthrough; 2050 case NL80211_BAND_2GHZ: 2051 case NL80211_BAND_60GHZ: 2052 case NL80211_BAND_LC: 2053 chan_increment = 1; 2054 break; 2055 case NL80211_BAND_5GHZ: 2056 chan_increment = 4; 2057 break; 2058 case NL80211_BAND_6GHZ: 2059 /* 2060 * In the 6 GHz band, the "maximum transmit power level" 2061 * field in the triplets is reserved, and thus will be 2062 * zero and we shouldn't use it to control TX power. 2063 * The actual TX power will be given in the transmit 2064 * power envelope element instead. 2065 */ 2066 return false; 2067 } 2068 2069 /* find channel */ 2070 while (country_ie_len >= 3) { 2071 u8 first_channel = triplet->chans.first_channel; 2072 2073 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2074 goto next; 2075 2076 for (i = 0; i < triplet->chans.num_channels; i++) { 2077 if (first_channel + i * chan_increment == chan) { 2078 have_chan_pwr = true; 2079 *chan_pwr = triplet->chans.max_power; 2080 break; 2081 } 2082 } 2083 if (have_chan_pwr) 2084 break; 2085 2086 next: 2087 triplet++; 2088 country_ie_len -= 3; 2089 } 2090 2091 if (have_chan_pwr && pwr_constr_elem) 2092 *pwr_reduction = *pwr_constr_elem; 2093 else 2094 *pwr_reduction = 0; 2095 2096 return have_chan_pwr; 2097 } 2098 2099 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2100 struct ieee80211_channel *channel, 2101 const u8 *cisco_dtpc_ie, 2102 int *pwr_level) 2103 { 2104 /* From practical testing, the first data byte of the DTPC element 2105 * seems to contain the requested dBm level, and the CLI on Cisco 2106 * APs clearly state the range is -127 to 127 dBm, which indicates 2107 * a signed byte, although it seemingly never actually goes negative. 2108 * The other byte seems to always be zero. 2109 */ 2110 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2111 } 2112 2113 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2114 struct ieee80211_channel *channel, 2115 struct ieee80211_mgmt *mgmt, 2116 const u8 *country_ie, u8 country_ie_len, 2117 const u8 *pwr_constr_ie, 2118 const u8 *cisco_dtpc_ie) 2119 { 2120 struct ieee80211_sub_if_data *sdata = link->sdata; 2121 bool has_80211h_pwr = false, has_cisco_pwr = false; 2122 int chan_pwr = 0, pwr_reduction_80211h = 0; 2123 int pwr_level_cisco, pwr_level_80211h; 2124 int new_ap_level; 2125 __le16 capab = mgmt->u.probe_resp.capab_info; 2126 2127 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2128 return 0; /* TODO */ 2129 2130 if (country_ie && 2131 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2132 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2133 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2134 sdata, channel, country_ie, country_ie_len, 2135 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2136 pwr_level_80211h = 2137 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2138 } 2139 2140 if (cisco_dtpc_ie) { 2141 ieee80211_find_cisco_dtpc( 2142 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2143 has_cisco_pwr = true; 2144 } 2145 2146 if (!has_80211h_pwr && !has_cisco_pwr) 2147 return 0; 2148 2149 /* If we have both 802.11h and Cisco DTPC, apply both limits 2150 * by picking the smallest of the two power levels advertised. 2151 */ 2152 if (has_80211h_pwr && 2153 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2154 new_ap_level = pwr_level_80211h; 2155 2156 if (link->ap_power_level == new_ap_level) 2157 return 0; 2158 2159 sdata_dbg(sdata, 2160 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2161 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2162 link->u.mgd.bssid); 2163 } else { /* has_cisco_pwr is always true here. */ 2164 new_ap_level = pwr_level_cisco; 2165 2166 if (link->ap_power_level == new_ap_level) 2167 return 0; 2168 2169 sdata_dbg(sdata, 2170 "Limiting TX power to %d dBm as advertised by %pM\n", 2171 pwr_level_cisco, link->u.mgd.bssid); 2172 } 2173 2174 link->ap_power_level = new_ap_level; 2175 if (__ieee80211_recalc_txpower(sdata)) 2176 return BSS_CHANGED_TXPOWER; 2177 return 0; 2178 } 2179 2180 /* powersave */ 2181 static void ieee80211_enable_ps(struct ieee80211_local *local, 2182 struct ieee80211_sub_if_data *sdata) 2183 { 2184 struct ieee80211_conf *conf = &local->hw.conf; 2185 2186 /* 2187 * If we are scanning right now then the parameters will 2188 * take effect when scan finishes. 2189 */ 2190 if (local->scanning) 2191 return; 2192 2193 if (conf->dynamic_ps_timeout > 0 && 2194 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2195 mod_timer(&local->dynamic_ps_timer, jiffies + 2196 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2197 } else { 2198 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2199 ieee80211_send_nullfunc(local, sdata, true); 2200 2201 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2202 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2203 return; 2204 2205 conf->flags |= IEEE80211_CONF_PS; 2206 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2207 } 2208 } 2209 2210 static void ieee80211_change_ps(struct ieee80211_local *local) 2211 { 2212 struct ieee80211_conf *conf = &local->hw.conf; 2213 2214 if (local->ps_sdata) { 2215 ieee80211_enable_ps(local, local->ps_sdata); 2216 } else if (conf->flags & IEEE80211_CONF_PS) { 2217 conf->flags &= ~IEEE80211_CONF_PS; 2218 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2219 del_timer_sync(&local->dynamic_ps_timer); 2220 cancel_work_sync(&local->dynamic_ps_enable_work); 2221 } 2222 } 2223 2224 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2225 { 2226 struct ieee80211_local *local = sdata->local; 2227 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2228 struct sta_info *sta = NULL; 2229 bool authorized = false; 2230 2231 if (!mgd->powersave) 2232 return false; 2233 2234 if (mgd->broken_ap) 2235 return false; 2236 2237 if (!mgd->associated) 2238 return false; 2239 2240 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2241 return false; 2242 2243 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2244 !sdata->deflink.u.mgd.have_beacon) 2245 return false; 2246 2247 rcu_read_lock(); 2248 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2249 if (sta) 2250 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2251 rcu_read_unlock(); 2252 2253 return authorized; 2254 } 2255 2256 /* need to hold RTNL or interface lock */ 2257 void ieee80211_recalc_ps(struct ieee80211_local *local) 2258 { 2259 struct ieee80211_sub_if_data *sdata, *found = NULL; 2260 int count = 0; 2261 int timeout; 2262 2263 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2264 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2265 local->ps_sdata = NULL; 2266 return; 2267 } 2268 2269 list_for_each_entry(sdata, &local->interfaces, list) { 2270 if (!ieee80211_sdata_running(sdata)) 2271 continue; 2272 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2273 /* If an AP vif is found, then disable PS 2274 * by setting the count to zero thereby setting 2275 * ps_sdata to NULL. 2276 */ 2277 count = 0; 2278 break; 2279 } 2280 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2281 continue; 2282 found = sdata; 2283 count++; 2284 } 2285 2286 if (count == 1 && ieee80211_powersave_allowed(found)) { 2287 u8 dtimper = found->deflink.u.mgd.dtim_period; 2288 2289 timeout = local->dynamic_ps_forced_timeout; 2290 if (timeout < 0) 2291 timeout = 100; 2292 local->hw.conf.dynamic_ps_timeout = timeout; 2293 2294 /* If the TIM IE is invalid, pretend the value is 1 */ 2295 if (!dtimper) 2296 dtimper = 1; 2297 2298 local->hw.conf.ps_dtim_period = dtimper; 2299 local->ps_sdata = found; 2300 } else { 2301 local->ps_sdata = NULL; 2302 } 2303 2304 ieee80211_change_ps(local); 2305 } 2306 2307 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2308 { 2309 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2310 2311 if (sdata->vif.cfg.ps != ps_allowed) { 2312 sdata->vif.cfg.ps = ps_allowed; 2313 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2314 } 2315 } 2316 2317 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2318 { 2319 struct ieee80211_local *local = 2320 container_of(work, struct ieee80211_local, 2321 dynamic_ps_disable_work); 2322 2323 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2324 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2325 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2326 } 2327 2328 ieee80211_wake_queues_by_reason(&local->hw, 2329 IEEE80211_MAX_QUEUE_MAP, 2330 IEEE80211_QUEUE_STOP_REASON_PS, 2331 false); 2332 } 2333 2334 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2335 { 2336 struct ieee80211_local *local = 2337 container_of(work, struct ieee80211_local, 2338 dynamic_ps_enable_work); 2339 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2340 struct ieee80211_if_managed *ifmgd; 2341 unsigned long flags; 2342 int q; 2343 2344 /* can only happen when PS was just disabled anyway */ 2345 if (!sdata) 2346 return; 2347 2348 ifmgd = &sdata->u.mgd; 2349 2350 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2351 return; 2352 2353 if (local->hw.conf.dynamic_ps_timeout > 0) { 2354 /* don't enter PS if TX frames are pending */ 2355 if (drv_tx_frames_pending(local)) { 2356 mod_timer(&local->dynamic_ps_timer, jiffies + 2357 msecs_to_jiffies( 2358 local->hw.conf.dynamic_ps_timeout)); 2359 return; 2360 } 2361 2362 /* 2363 * transmission can be stopped by others which leads to 2364 * dynamic_ps_timer expiry. Postpone the ps timer if it 2365 * is not the actual idle state. 2366 */ 2367 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2368 for (q = 0; q < local->hw.queues; q++) { 2369 if (local->queue_stop_reasons[q]) { 2370 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2371 flags); 2372 mod_timer(&local->dynamic_ps_timer, jiffies + 2373 msecs_to_jiffies( 2374 local->hw.conf.dynamic_ps_timeout)); 2375 return; 2376 } 2377 } 2378 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2379 } 2380 2381 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2382 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2383 if (drv_tx_frames_pending(local)) { 2384 mod_timer(&local->dynamic_ps_timer, jiffies + 2385 msecs_to_jiffies( 2386 local->hw.conf.dynamic_ps_timeout)); 2387 } else { 2388 ieee80211_send_nullfunc(local, sdata, true); 2389 /* Flush to get the tx status of nullfunc frame */ 2390 ieee80211_flush_queues(local, sdata, false); 2391 } 2392 } 2393 2394 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2395 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2396 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2397 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2398 local->hw.conf.flags |= IEEE80211_CONF_PS; 2399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2400 } 2401 } 2402 2403 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2404 { 2405 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2406 2407 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2408 } 2409 2410 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2411 { 2412 struct delayed_work *delayed_work = to_delayed_work(work); 2413 struct ieee80211_link_data *link = 2414 container_of(delayed_work, struct ieee80211_link_data, 2415 dfs_cac_timer_work); 2416 struct cfg80211_chan_def chandef = link->conf->chandef; 2417 struct ieee80211_sub_if_data *sdata = link->sdata; 2418 2419 mutex_lock(&sdata->local->mtx); 2420 if (sdata->wdev.cac_started) { 2421 ieee80211_link_release_channel(link); 2422 cfg80211_cac_event(sdata->dev, &chandef, 2423 NL80211_RADAR_CAC_FINISHED, 2424 GFP_KERNEL); 2425 } 2426 mutex_unlock(&sdata->local->mtx); 2427 } 2428 2429 static bool 2430 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2431 { 2432 struct ieee80211_local *local = sdata->local; 2433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2434 bool ret = false; 2435 int ac; 2436 2437 if (local->hw.queues < IEEE80211_NUM_ACS) 2438 return false; 2439 2440 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2441 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2442 int non_acm_ac; 2443 unsigned long now = jiffies; 2444 2445 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2446 tx_tspec->admitted_time && 2447 time_after(now, tx_tspec->time_slice_start + HZ)) { 2448 tx_tspec->consumed_tx_time = 0; 2449 tx_tspec->time_slice_start = now; 2450 2451 if (tx_tspec->downgraded) 2452 tx_tspec->action = 2453 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2454 } 2455 2456 switch (tx_tspec->action) { 2457 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2458 /* take the original parameters */ 2459 if (drv_conf_tx(local, &sdata->deflink, ac, 2460 &sdata->deflink.tx_conf[ac])) 2461 link_err(&sdata->deflink, 2462 "failed to set TX queue parameters for queue %d\n", 2463 ac); 2464 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2465 tx_tspec->downgraded = false; 2466 ret = true; 2467 break; 2468 case TX_TSPEC_ACTION_DOWNGRADE: 2469 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2470 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2471 ret = true; 2472 break; 2473 } 2474 /* downgrade next lower non-ACM AC */ 2475 for (non_acm_ac = ac + 1; 2476 non_acm_ac < IEEE80211_NUM_ACS; 2477 non_acm_ac++) 2478 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2479 break; 2480 /* Usually the loop will result in using BK even if it 2481 * requires admission control, but such a configuration 2482 * makes no sense and we have to transmit somehow - the 2483 * AC selection does the same thing. 2484 * If we started out trying to downgrade from BK, then 2485 * the extra condition here might be needed. 2486 */ 2487 if (non_acm_ac >= IEEE80211_NUM_ACS) 2488 non_acm_ac = IEEE80211_AC_BK; 2489 if (drv_conf_tx(local, &sdata->deflink, ac, 2490 &sdata->deflink.tx_conf[non_acm_ac])) 2491 link_err(&sdata->deflink, 2492 "failed to set TX queue parameters for queue %d\n", 2493 ac); 2494 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2495 ret = true; 2496 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2497 tx_tspec->time_slice_start + HZ - now + 1); 2498 break; 2499 case TX_TSPEC_ACTION_NONE: 2500 /* nothing now */ 2501 break; 2502 } 2503 } 2504 2505 return ret; 2506 } 2507 2508 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2509 { 2510 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2511 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2512 BSS_CHANGED_QOS); 2513 } 2514 2515 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2516 { 2517 struct ieee80211_sub_if_data *sdata; 2518 2519 sdata = container_of(work, struct ieee80211_sub_if_data, 2520 u.mgd.tx_tspec_wk.work); 2521 ieee80211_sta_handle_tspec_ac_params(sdata); 2522 } 2523 2524 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2525 { 2526 struct ieee80211_sub_if_data *sdata = link->sdata; 2527 struct ieee80211_local *local = sdata->local; 2528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2529 struct ieee80211_tx_queue_params *params = link->tx_conf; 2530 u8 ac; 2531 2532 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2533 mlme_dbg(sdata, 2534 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2535 ac, params[ac].acm, 2536 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2537 params[ac].txop, params[ac].uapsd, 2538 ifmgd->tx_tspec[ac].downgraded); 2539 if (!ifmgd->tx_tspec[ac].downgraded && 2540 drv_conf_tx(local, link, ac, ¶ms[ac])) 2541 link_err(link, 2542 "failed to set TX queue parameters for AC %d\n", 2543 ac); 2544 } 2545 } 2546 2547 /* MLME */ 2548 static bool 2549 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2550 struct ieee80211_link_data *link, 2551 const u8 *wmm_param, size_t wmm_param_len, 2552 const struct ieee80211_mu_edca_param_set *mu_edca) 2553 { 2554 struct ieee80211_sub_if_data *sdata = link->sdata; 2555 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2557 size_t left; 2558 int count, mu_edca_count, ac; 2559 const u8 *pos; 2560 u8 uapsd_queues = 0; 2561 2562 if (!local->ops->conf_tx) 2563 return false; 2564 2565 if (local->hw.queues < IEEE80211_NUM_ACS) 2566 return false; 2567 2568 if (!wmm_param) 2569 return false; 2570 2571 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2572 return false; 2573 2574 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2575 uapsd_queues = ifmgd->uapsd_queues; 2576 2577 count = wmm_param[6] & 0x0f; 2578 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2579 * if mu_edca was preset before and now it disappeared tell 2580 * the driver about it. 2581 */ 2582 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2583 if (count == link->u.mgd.wmm_last_param_set && 2584 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2585 return false; 2586 link->u.mgd.wmm_last_param_set = count; 2587 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2588 2589 pos = wmm_param + 8; 2590 left = wmm_param_len - 8; 2591 2592 memset(¶ms, 0, sizeof(params)); 2593 2594 sdata->wmm_acm = 0; 2595 for (; left >= 4; left -= 4, pos += 4) { 2596 int aci = (pos[0] >> 5) & 0x03; 2597 int acm = (pos[0] >> 4) & 0x01; 2598 bool uapsd = false; 2599 2600 switch (aci) { 2601 case 1: /* AC_BK */ 2602 ac = IEEE80211_AC_BK; 2603 if (acm) 2604 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2605 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2606 uapsd = true; 2607 params[ac].mu_edca = !!mu_edca; 2608 if (mu_edca) 2609 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2610 break; 2611 case 2: /* AC_VI */ 2612 ac = IEEE80211_AC_VI; 2613 if (acm) 2614 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2615 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2616 uapsd = true; 2617 params[ac].mu_edca = !!mu_edca; 2618 if (mu_edca) 2619 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2620 break; 2621 case 3: /* AC_VO */ 2622 ac = IEEE80211_AC_VO; 2623 if (acm) 2624 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2625 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2626 uapsd = true; 2627 params[ac].mu_edca = !!mu_edca; 2628 if (mu_edca) 2629 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2630 break; 2631 case 0: /* AC_BE */ 2632 default: 2633 ac = IEEE80211_AC_BE; 2634 if (acm) 2635 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2636 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2637 uapsd = true; 2638 params[ac].mu_edca = !!mu_edca; 2639 if (mu_edca) 2640 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2641 break; 2642 } 2643 2644 params[ac].aifs = pos[0] & 0x0f; 2645 2646 if (params[ac].aifs < 2) { 2647 sdata_info(sdata, 2648 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2649 params[ac].aifs, aci); 2650 params[ac].aifs = 2; 2651 } 2652 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2653 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2654 params[ac].txop = get_unaligned_le16(pos + 2); 2655 params[ac].acm = acm; 2656 params[ac].uapsd = uapsd; 2657 2658 if (params[ac].cw_min == 0 || 2659 params[ac].cw_min > params[ac].cw_max) { 2660 sdata_info(sdata, 2661 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2662 params[ac].cw_min, params[ac].cw_max, aci); 2663 return false; 2664 } 2665 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2666 } 2667 2668 /* WMM specification requires all 4 ACIs. */ 2669 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2670 if (params[ac].cw_min == 0) { 2671 sdata_info(sdata, 2672 "AP has invalid WMM params (missing AC %d), using defaults\n", 2673 ac); 2674 return false; 2675 } 2676 } 2677 2678 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2679 link->tx_conf[ac] = params[ac]; 2680 2681 ieee80211_mgd_set_link_qos_params(link); 2682 2683 /* enable WMM or activate new settings */ 2684 link->conf->qos = true; 2685 return true; 2686 } 2687 2688 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2689 { 2690 lockdep_assert_held(&sdata->local->mtx); 2691 2692 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2693 ieee80211_run_deferred_scan(sdata->local); 2694 } 2695 2696 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2697 { 2698 mutex_lock(&sdata->local->mtx); 2699 __ieee80211_stop_poll(sdata); 2700 mutex_unlock(&sdata->local->mtx); 2701 } 2702 2703 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2704 u16 capab, bool erp_valid, u8 erp) 2705 { 2706 struct ieee80211_bss_conf *bss_conf = link->conf; 2707 struct ieee80211_supported_band *sband; 2708 u64 changed = 0; 2709 bool use_protection; 2710 bool use_short_preamble; 2711 bool use_short_slot; 2712 2713 sband = ieee80211_get_link_sband(link); 2714 if (!sband) 2715 return changed; 2716 2717 if (erp_valid) { 2718 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2719 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2720 } else { 2721 use_protection = false; 2722 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2723 } 2724 2725 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2726 if (sband->band == NL80211_BAND_5GHZ || 2727 sband->band == NL80211_BAND_6GHZ) 2728 use_short_slot = true; 2729 2730 if (use_protection != bss_conf->use_cts_prot) { 2731 bss_conf->use_cts_prot = use_protection; 2732 changed |= BSS_CHANGED_ERP_CTS_PROT; 2733 } 2734 2735 if (use_short_preamble != bss_conf->use_short_preamble) { 2736 bss_conf->use_short_preamble = use_short_preamble; 2737 changed |= BSS_CHANGED_ERP_PREAMBLE; 2738 } 2739 2740 if (use_short_slot != bss_conf->use_short_slot) { 2741 bss_conf->use_short_slot = use_short_slot; 2742 changed |= BSS_CHANGED_ERP_SLOT; 2743 } 2744 2745 return changed; 2746 } 2747 2748 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2749 struct cfg80211_bss *cbss) 2750 { 2751 struct ieee80211_sub_if_data *sdata = link->sdata; 2752 struct ieee80211_bss_conf *bss_conf = link->conf; 2753 struct ieee80211_bss *bss = (void *)cbss->priv; 2754 u64 changed = BSS_CHANGED_QOS; 2755 2756 /* not really used in MLO */ 2757 sdata->u.mgd.beacon_timeout = 2758 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2759 bss_conf->beacon_int)); 2760 2761 changed |= ieee80211_handle_bss_capability(link, 2762 bss_conf->assoc_capability, 2763 bss->has_erp_value, 2764 bss->erp_value); 2765 2766 ieee80211_check_rate_mask(link); 2767 2768 link->u.mgd.bss = cbss; 2769 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2770 2771 if (sdata->vif.p2p || 2772 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2773 const struct cfg80211_bss_ies *ies; 2774 2775 rcu_read_lock(); 2776 ies = rcu_dereference(cbss->ies); 2777 if (ies) { 2778 int ret; 2779 2780 ret = cfg80211_get_p2p_attr( 2781 ies->data, ies->len, 2782 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2783 (u8 *) &bss_conf->p2p_noa_attr, 2784 sizeof(bss_conf->p2p_noa_attr)); 2785 if (ret >= 2) { 2786 link->u.mgd.p2p_noa_index = 2787 bss_conf->p2p_noa_attr.index; 2788 changed |= BSS_CHANGED_P2P_PS; 2789 } 2790 } 2791 rcu_read_unlock(); 2792 } 2793 2794 if (link->u.mgd.have_beacon) { 2795 bss_conf->beacon_rate = bss->beacon_rate; 2796 changed |= BSS_CHANGED_BEACON_INFO; 2797 } else { 2798 bss_conf->beacon_rate = NULL; 2799 } 2800 2801 /* Tell the driver to monitor connection quality (if supported) */ 2802 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2803 bss_conf->cqm_rssi_thold) 2804 changed |= BSS_CHANGED_CQM; 2805 2806 return changed; 2807 } 2808 2809 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2810 struct ieee80211_mgd_assoc_data *assoc_data, 2811 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2812 { 2813 struct ieee80211_local *local = sdata->local; 2814 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2815 u64 vif_changed = BSS_CHANGED_ASSOC; 2816 unsigned int link_id; 2817 2818 sdata->u.mgd.associated = true; 2819 2820 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2821 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2822 struct ieee80211_link_data *link; 2823 2824 if (!cbss || 2825 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2826 continue; 2827 2828 link = sdata_dereference(sdata->link[link_id], sdata); 2829 if (WARN_ON(!link)) 2830 return; 2831 2832 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2833 } 2834 2835 /* just to be sure */ 2836 ieee80211_stop_poll(sdata); 2837 2838 ieee80211_led_assoc(local, 1); 2839 2840 vif_cfg->assoc = 1; 2841 2842 /* Enable ARP filtering */ 2843 if (vif_cfg->arp_addr_cnt) 2844 vif_changed |= BSS_CHANGED_ARP_FILTER; 2845 2846 if (sdata->vif.valid_links) { 2847 for (link_id = 0; 2848 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2849 link_id++) { 2850 struct ieee80211_link_data *link; 2851 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2852 2853 if (!cbss || 2854 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2855 continue; 2856 2857 link = sdata_dereference(sdata->link[link_id], sdata); 2858 if (WARN_ON(!link)) 2859 return; 2860 2861 ieee80211_link_info_change_notify(sdata, link, 2862 changed[link_id]); 2863 2864 ieee80211_recalc_smps(sdata, link); 2865 } 2866 2867 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2868 } else { 2869 ieee80211_bss_info_change_notify(sdata, 2870 vif_changed | changed[0]); 2871 } 2872 2873 mutex_lock(&local->iflist_mtx); 2874 ieee80211_recalc_ps(local); 2875 mutex_unlock(&local->iflist_mtx); 2876 2877 /* leave this here to not change ordering in non-MLO cases */ 2878 if (!sdata->vif.valid_links) 2879 ieee80211_recalc_smps(sdata, &sdata->deflink); 2880 ieee80211_recalc_ps_vif(sdata); 2881 2882 netif_carrier_on(sdata->dev); 2883 } 2884 2885 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2886 u16 stype, u16 reason, bool tx, 2887 u8 *frame_buf) 2888 { 2889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2890 struct ieee80211_local *local = sdata->local; 2891 unsigned int link_id; 2892 u64 changed = 0; 2893 struct ieee80211_prep_tx_info info = { 2894 .subtype = stype, 2895 }; 2896 2897 sdata_assert_lock(sdata); 2898 2899 if (WARN_ON_ONCE(tx && !frame_buf)) 2900 return; 2901 2902 if (WARN_ON(!ifmgd->associated)) 2903 return; 2904 2905 ieee80211_stop_poll(sdata); 2906 2907 ifmgd->associated = false; 2908 2909 /* other links will be destroyed */ 2910 sdata->deflink.u.mgd.bss = NULL; 2911 2912 netif_carrier_off(sdata->dev); 2913 2914 /* 2915 * if we want to get out of ps before disassoc (why?) we have 2916 * to do it before sending disassoc, as otherwise the null-packet 2917 * won't be valid. 2918 */ 2919 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2920 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2921 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2922 } 2923 local->ps_sdata = NULL; 2924 2925 /* disable per-vif ps */ 2926 ieee80211_recalc_ps_vif(sdata); 2927 2928 /* make sure ongoing transmission finishes */ 2929 synchronize_net(); 2930 2931 /* 2932 * drop any frame before deauth/disassoc, this can be data or 2933 * management frame. Since we are disconnecting, we should not 2934 * insist sending these frames which can take time and delay 2935 * the disconnection and possible the roaming. 2936 */ 2937 if (tx) 2938 ieee80211_flush_queues(local, sdata, true); 2939 2940 /* deauthenticate/disassociate now */ 2941 if (tx || frame_buf) { 2942 /* 2943 * In multi channel scenarios guarantee that the virtual 2944 * interface is granted immediate airtime to transmit the 2945 * deauthentication frame by calling mgd_prepare_tx, if the 2946 * driver requested so. 2947 */ 2948 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2949 !sdata->deflink.u.mgd.have_beacon) { 2950 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2951 } 2952 2953 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2954 sdata->vif.cfg.ap_addr, stype, 2955 reason, tx, frame_buf); 2956 } 2957 2958 /* flush out frame - make sure the deauth was actually sent */ 2959 if (tx) 2960 ieee80211_flush_queues(local, sdata, false); 2961 2962 drv_mgd_complete_tx(sdata->local, sdata, &info); 2963 2964 /* clear AP addr only after building the needed mgmt frames */ 2965 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2966 eth_zero_addr(sdata->vif.cfg.ap_addr); 2967 2968 sdata->vif.cfg.ssid_len = 0; 2969 2970 /* remove AP and TDLS peers */ 2971 sta_info_flush(sdata); 2972 2973 /* finally reset all BSS / config parameters */ 2974 if (!sdata->vif.valid_links) 2975 changed |= ieee80211_reset_erp_info(sdata); 2976 2977 ieee80211_led_assoc(local, 0); 2978 changed |= BSS_CHANGED_ASSOC; 2979 sdata->vif.cfg.assoc = false; 2980 2981 sdata->deflink.u.mgd.p2p_noa_index = -1; 2982 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2983 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2984 2985 /* on the next assoc, re-program HT/VHT parameters */ 2986 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2987 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2988 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2989 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2990 2991 /* 2992 * reset MU-MIMO ownership and group data in default link, 2993 * if used, other links are destroyed 2994 */ 2995 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2996 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2997 memset(sdata->vif.bss_conf.mu_group.position, 0, 2998 sizeof(sdata->vif.bss_conf.mu_group.position)); 2999 if (!sdata->vif.valid_links) 3000 changed |= BSS_CHANGED_MU_GROUPS; 3001 sdata->vif.bss_conf.mu_mimo_owner = false; 3002 3003 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3004 3005 del_timer_sync(&local->dynamic_ps_timer); 3006 cancel_work_sync(&local->dynamic_ps_enable_work); 3007 3008 /* Disable ARP filtering */ 3009 if (sdata->vif.cfg.arp_addr_cnt) 3010 changed |= BSS_CHANGED_ARP_FILTER; 3011 3012 sdata->vif.bss_conf.qos = false; 3013 if (!sdata->vif.valid_links) { 3014 changed |= BSS_CHANGED_QOS; 3015 /* The BSSID (not really interesting) and HT changed */ 3016 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3017 ieee80211_bss_info_change_notify(sdata, changed); 3018 } else { 3019 ieee80211_vif_cfg_change_notify(sdata, changed); 3020 } 3021 3022 /* disassociated - set to defaults now */ 3023 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3024 3025 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3026 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3027 del_timer_sync(&sdata->u.mgd.timer); 3028 3029 sdata->vif.bss_conf.dtim_period = 0; 3030 sdata->vif.bss_conf.beacon_rate = NULL; 3031 3032 sdata->deflink.u.mgd.have_beacon = false; 3033 sdata->deflink.u.mgd.tracking_signal_avg = false; 3034 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3035 3036 ifmgd->flags = 0; 3037 sdata->deflink.u.mgd.conn_flags = 0; 3038 mutex_lock(&local->mtx); 3039 3040 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3041 struct ieee80211_link_data *link; 3042 3043 link = sdata_dereference(sdata->link[link_id], sdata); 3044 if (!link) 3045 continue; 3046 ieee80211_link_release_channel(link); 3047 } 3048 3049 sdata->vif.bss_conf.csa_active = false; 3050 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3051 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3052 if (sdata->deflink.csa_block_tx) { 3053 ieee80211_wake_vif_queues(local, sdata, 3054 IEEE80211_QUEUE_STOP_REASON_CSA); 3055 sdata->deflink.csa_block_tx = false; 3056 } 3057 mutex_unlock(&local->mtx); 3058 3059 /* existing TX TSPEC sessions no longer exist */ 3060 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3061 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 3062 3063 sdata->vif.bss_conf.pwr_reduction = 0; 3064 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3065 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3066 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3067 3068 ieee80211_vif_set_links(sdata, 0); 3069 } 3070 3071 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3072 { 3073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3074 struct ieee80211_local *local = sdata->local; 3075 3076 mutex_lock(&local->mtx); 3077 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3078 goto out; 3079 3080 __ieee80211_stop_poll(sdata); 3081 3082 mutex_lock(&local->iflist_mtx); 3083 ieee80211_recalc_ps(local); 3084 mutex_unlock(&local->iflist_mtx); 3085 3086 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3087 goto out; 3088 3089 /* 3090 * We've received a probe response, but are not sure whether 3091 * we have or will be receiving any beacons or data, so let's 3092 * schedule the timers again, just in case. 3093 */ 3094 ieee80211_sta_reset_beacon_monitor(sdata); 3095 3096 mod_timer(&ifmgd->conn_mon_timer, 3097 round_jiffies_up(jiffies + 3098 IEEE80211_CONNECTION_IDLE_TIME)); 3099 out: 3100 mutex_unlock(&local->mtx); 3101 } 3102 3103 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3104 struct ieee80211_hdr *hdr, 3105 u16 tx_time) 3106 { 3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3108 u16 tid; 3109 int ac; 3110 struct ieee80211_sta_tx_tspec *tx_tspec; 3111 unsigned long now = jiffies; 3112 3113 if (!ieee80211_is_data_qos(hdr->frame_control)) 3114 return; 3115 3116 tid = ieee80211_get_tid(hdr); 3117 ac = ieee80211_ac_from_tid(tid); 3118 tx_tspec = &ifmgd->tx_tspec[ac]; 3119 3120 if (likely(!tx_tspec->admitted_time)) 3121 return; 3122 3123 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3124 tx_tspec->consumed_tx_time = 0; 3125 tx_tspec->time_slice_start = now; 3126 3127 if (tx_tspec->downgraded) { 3128 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3129 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3130 } 3131 } 3132 3133 if (tx_tspec->downgraded) 3134 return; 3135 3136 tx_tspec->consumed_tx_time += tx_time; 3137 3138 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3139 tx_tspec->downgraded = true; 3140 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3141 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3142 } 3143 } 3144 3145 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3146 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3147 { 3148 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3149 3150 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3151 !sdata->u.mgd.probe_send_count) 3152 return; 3153 3154 if (ack) 3155 sdata->u.mgd.probe_send_count = 0; 3156 else 3157 sdata->u.mgd.nullfunc_failed = true; 3158 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3159 } 3160 3161 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3162 const u8 *src, const u8 *dst, 3163 const u8 *ssid, size_t ssid_len, 3164 struct ieee80211_channel *channel) 3165 { 3166 struct sk_buff *skb; 3167 3168 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3169 ssid, ssid_len, NULL, 0, 3170 IEEE80211_PROBE_FLAG_DIRECTED); 3171 if (skb) 3172 ieee80211_tx_skb(sdata, skb); 3173 } 3174 3175 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3176 { 3177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3178 u8 *dst = sdata->vif.cfg.ap_addr; 3179 u8 unicast_limit = max(1, max_probe_tries - 3); 3180 struct sta_info *sta; 3181 3182 if (WARN_ON(sdata->vif.valid_links)) 3183 return; 3184 3185 /* 3186 * Try sending broadcast probe requests for the last three 3187 * probe requests after the first ones failed since some 3188 * buggy APs only support broadcast probe requests. 3189 */ 3190 if (ifmgd->probe_send_count >= unicast_limit) 3191 dst = NULL; 3192 3193 /* 3194 * When the hardware reports an accurate Tx ACK status, it's 3195 * better to send a nullfunc frame instead of a probe request, 3196 * as it will kick us off the AP quickly if we aren't associated 3197 * anymore. The timeout will be reset if the frame is ACKed by 3198 * the AP. 3199 */ 3200 ifmgd->probe_send_count++; 3201 3202 if (dst) { 3203 mutex_lock(&sdata->local->sta_mtx); 3204 sta = sta_info_get(sdata, dst); 3205 if (!WARN_ON(!sta)) 3206 ieee80211_check_fast_rx(sta); 3207 mutex_unlock(&sdata->local->sta_mtx); 3208 } 3209 3210 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3211 ifmgd->nullfunc_failed = false; 3212 ieee80211_send_nullfunc(sdata->local, sdata, false); 3213 } else { 3214 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3215 sdata->vif.cfg.ssid, 3216 sdata->vif.cfg.ssid_len, 3217 sdata->deflink.u.mgd.bss->channel); 3218 } 3219 3220 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3221 run_again(sdata, ifmgd->probe_timeout); 3222 } 3223 3224 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3225 bool beacon) 3226 { 3227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3228 bool already = false; 3229 3230 if (WARN_ON_ONCE(sdata->vif.valid_links)) 3231 return; 3232 3233 if (!ieee80211_sdata_running(sdata)) 3234 return; 3235 3236 sdata_lock(sdata); 3237 3238 if (!ifmgd->associated) 3239 goto out; 3240 3241 mutex_lock(&sdata->local->mtx); 3242 3243 if (sdata->local->tmp_channel || sdata->local->scanning) { 3244 mutex_unlock(&sdata->local->mtx); 3245 goto out; 3246 } 3247 3248 if (sdata->local->suspending) { 3249 /* reschedule after resume */ 3250 mutex_unlock(&sdata->local->mtx); 3251 ieee80211_reset_ap_probe(sdata); 3252 goto out; 3253 } 3254 3255 if (beacon) { 3256 mlme_dbg_ratelimited(sdata, 3257 "detected beacon loss from AP (missed %d beacons) - probing\n", 3258 beacon_loss_count); 3259 3260 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3261 } 3262 3263 /* 3264 * The driver/our work has already reported this event or the 3265 * connection monitoring has kicked in and we have already sent 3266 * a probe request. Or maybe the AP died and the driver keeps 3267 * reporting until we disassociate... 3268 * 3269 * In either case we have to ignore the current call to this 3270 * function (except for setting the correct probe reason bit) 3271 * because otherwise we would reset the timer every time and 3272 * never check whether we received a probe response! 3273 */ 3274 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3275 already = true; 3276 3277 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3278 3279 mutex_unlock(&sdata->local->mtx); 3280 3281 if (already) 3282 goto out; 3283 3284 mutex_lock(&sdata->local->iflist_mtx); 3285 ieee80211_recalc_ps(sdata->local); 3286 mutex_unlock(&sdata->local->iflist_mtx); 3287 3288 ifmgd->probe_send_count = 0; 3289 ieee80211_mgd_probe_ap_send(sdata); 3290 out: 3291 sdata_unlock(sdata); 3292 } 3293 3294 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3295 struct ieee80211_vif *vif) 3296 { 3297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3299 struct cfg80211_bss *cbss; 3300 struct sk_buff *skb; 3301 const struct element *ssid; 3302 int ssid_len; 3303 3304 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3305 sdata->vif.valid_links)) 3306 return NULL; 3307 3308 sdata_assert_lock(sdata); 3309 3310 if (ifmgd->associated) 3311 cbss = sdata->deflink.u.mgd.bss; 3312 else if (ifmgd->auth_data) 3313 cbss = ifmgd->auth_data->bss; 3314 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3315 cbss = ifmgd->assoc_data->link[0].bss; 3316 else 3317 return NULL; 3318 3319 rcu_read_lock(); 3320 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3321 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3322 "invalid SSID element (len=%d)", 3323 ssid ? ssid->datalen : -1)) 3324 ssid_len = 0; 3325 else 3326 ssid_len = ssid->datalen; 3327 3328 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3329 (u32) -1, cbss->channel, 3330 ssid->data, ssid_len, 3331 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3332 rcu_read_unlock(); 3333 3334 return skb; 3335 } 3336 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3337 3338 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3339 const u8 *buf, size_t len, bool tx, 3340 u16 reason, bool reconnect) 3341 { 3342 struct ieee80211_event event = { 3343 .type = MLME_EVENT, 3344 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3345 .u.mlme.reason = reason, 3346 }; 3347 3348 if (tx) 3349 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3350 else 3351 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3352 3353 drv_event_callback(sdata->local, sdata, &event); 3354 } 3355 3356 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3357 { 3358 struct ieee80211_local *local = sdata->local; 3359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3360 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3361 bool tx; 3362 3363 sdata_lock(sdata); 3364 if (!ifmgd->associated) { 3365 sdata_unlock(sdata); 3366 return; 3367 } 3368 3369 /* in MLO assume we have a link where we can TX the frame */ 3370 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3371 3372 if (!ifmgd->driver_disconnect) { 3373 unsigned int link_id; 3374 3375 /* 3376 * AP is probably out of range (or not reachable for another 3377 * reason) so remove the bss structs for that AP. In the case 3378 * of multi-link, it's not clear that all of them really are 3379 * out of range, but if they weren't the driver likely would 3380 * have switched to just have a single link active? 3381 */ 3382 for (link_id = 0; 3383 link_id < ARRAY_SIZE(sdata->link); 3384 link_id++) { 3385 struct ieee80211_link_data *link; 3386 3387 link = sdata_dereference(sdata->link[link_id], sdata); 3388 if (!link) 3389 continue; 3390 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3391 link->u.mgd.bss = NULL; 3392 } 3393 } 3394 3395 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3396 ifmgd->driver_disconnect ? 3397 WLAN_REASON_DEAUTH_LEAVING : 3398 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3399 tx, frame_buf); 3400 mutex_lock(&local->mtx); 3401 /* the other links will be destroyed */ 3402 sdata->vif.bss_conf.csa_active = false; 3403 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3404 if (sdata->deflink.csa_block_tx) { 3405 ieee80211_wake_vif_queues(local, sdata, 3406 IEEE80211_QUEUE_STOP_REASON_CSA); 3407 sdata->deflink.csa_block_tx = false; 3408 } 3409 mutex_unlock(&local->mtx); 3410 3411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3413 ifmgd->reconnect); 3414 ifmgd->reconnect = false; 3415 3416 sdata_unlock(sdata); 3417 } 3418 3419 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3420 struct wiphy_work *work) 3421 { 3422 struct ieee80211_sub_if_data *sdata = 3423 container_of(work, struct ieee80211_sub_if_data, 3424 u.mgd.beacon_connection_loss_work); 3425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3426 3427 if (ifmgd->connection_loss) { 3428 sdata_info(sdata, "Connection to AP %pM lost\n", 3429 sdata->vif.cfg.ap_addr); 3430 __ieee80211_disconnect(sdata); 3431 ifmgd->connection_loss = false; 3432 } else if (ifmgd->driver_disconnect) { 3433 sdata_info(sdata, 3434 "Driver requested disconnection from AP %pM\n", 3435 sdata->vif.cfg.ap_addr); 3436 __ieee80211_disconnect(sdata); 3437 ifmgd->driver_disconnect = false; 3438 } else { 3439 if (ifmgd->associated) 3440 sdata->deflink.u.mgd.beacon_loss_count++; 3441 ieee80211_mgd_probe_ap(sdata, true); 3442 } 3443 } 3444 3445 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3446 struct wiphy_work *work) 3447 { 3448 struct ieee80211_sub_if_data *sdata = 3449 container_of(work, struct ieee80211_sub_if_data, 3450 u.mgd.csa_connection_drop_work); 3451 3452 __ieee80211_disconnect(sdata); 3453 } 3454 3455 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3456 { 3457 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3458 struct ieee80211_hw *hw = &sdata->local->hw; 3459 3460 trace_api_beacon_loss(sdata); 3461 3462 sdata->u.mgd.connection_loss = false; 3463 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3464 } 3465 EXPORT_SYMBOL(ieee80211_beacon_loss); 3466 3467 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3468 { 3469 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3470 struct ieee80211_hw *hw = &sdata->local->hw; 3471 3472 trace_api_connection_loss(sdata); 3473 3474 sdata->u.mgd.connection_loss = true; 3475 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3476 } 3477 EXPORT_SYMBOL(ieee80211_connection_loss); 3478 3479 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3480 { 3481 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3482 struct ieee80211_hw *hw = &sdata->local->hw; 3483 3484 trace_api_disconnect(sdata, reconnect); 3485 3486 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3487 return; 3488 3489 sdata->u.mgd.driver_disconnect = true; 3490 sdata->u.mgd.reconnect = reconnect; 3491 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3492 } 3493 EXPORT_SYMBOL(ieee80211_disconnect); 3494 3495 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3496 bool assoc) 3497 { 3498 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3499 3500 sdata_assert_lock(sdata); 3501 3502 if (!assoc) { 3503 /* 3504 * we are not authenticated yet, the only timer that could be 3505 * running is the timeout for the authentication response which 3506 * which is not relevant anymore. 3507 */ 3508 del_timer_sync(&sdata->u.mgd.timer); 3509 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3510 3511 /* other links are destroyed */ 3512 sdata->deflink.u.mgd.conn_flags = 0; 3513 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3514 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3515 BSS_CHANGED_BSSID); 3516 sdata->u.mgd.flags = 0; 3517 3518 mutex_lock(&sdata->local->mtx); 3519 ieee80211_link_release_channel(&sdata->deflink); 3520 ieee80211_vif_set_links(sdata, 0); 3521 mutex_unlock(&sdata->local->mtx); 3522 } 3523 3524 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3525 kfree(auth_data); 3526 sdata->u.mgd.auth_data = NULL; 3527 } 3528 3529 enum assoc_status { 3530 ASSOC_SUCCESS, 3531 ASSOC_REJECTED, 3532 ASSOC_TIMEOUT, 3533 ASSOC_ABANDON, 3534 }; 3535 3536 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3537 enum assoc_status status) 3538 { 3539 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3540 3541 sdata_assert_lock(sdata); 3542 3543 if (status != ASSOC_SUCCESS) { 3544 /* 3545 * we are not associated yet, the only timer that could be 3546 * running is the timeout for the association response which 3547 * which is not relevant anymore. 3548 */ 3549 del_timer_sync(&sdata->u.mgd.timer); 3550 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3551 3552 sdata->deflink.u.mgd.conn_flags = 0; 3553 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3554 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3555 BSS_CHANGED_BSSID); 3556 sdata->u.mgd.flags = 0; 3557 sdata->vif.bss_conf.mu_mimo_owner = false; 3558 3559 if (status != ASSOC_REJECTED) { 3560 struct cfg80211_assoc_failure data = { 3561 .timeout = status == ASSOC_TIMEOUT, 3562 }; 3563 int i; 3564 3565 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3566 ARRAY_SIZE(assoc_data->link)); 3567 3568 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3569 data.bss[i] = assoc_data->link[i].bss; 3570 3571 if (sdata->vif.valid_links) 3572 data.ap_mld_addr = assoc_data->ap_addr; 3573 3574 cfg80211_assoc_failure(sdata->dev, &data); 3575 } 3576 3577 mutex_lock(&sdata->local->mtx); 3578 ieee80211_link_release_channel(&sdata->deflink); 3579 ieee80211_vif_set_links(sdata, 0); 3580 mutex_unlock(&sdata->local->mtx); 3581 } 3582 3583 kfree(assoc_data); 3584 sdata->u.mgd.assoc_data = NULL; 3585 } 3586 3587 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3588 struct ieee80211_mgmt *mgmt, size_t len) 3589 { 3590 struct ieee80211_local *local = sdata->local; 3591 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3592 const struct element *challenge; 3593 u8 *pos; 3594 u32 tx_flags = 0; 3595 struct ieee80211_prep_tx_info info = { 3596 .subtype = IEEE80211_STYPE_AUTH, 3597 }; 3598 3599 pos = mgmt->u.auth.variable; 3600 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3601 len - (pos - (u8 *)mgmt)); 3602 if (!challenge) 3603 return; 3604 auth_data->expected_transaction = 4; 3605 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3606 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3607 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3608 IEEE80211_TX_INTFL_MLME_CONN_TX; 3609 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3610 (void *)challenge, 3611 challenge->datalen + sizeof(*challenge), 3612 auth_data->ap_addr, auth_data->ap_addr, 3613 auth_data->key, auth_data->key_len, 3614 auth_data->key_idx, tx_flags); 3615 } 3616 3617 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3618 { 3619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3620 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3621 struct sta_info *sta; 3622 bool result = true; 3623 3624 sdata_info(sdata, "authenticated\n"); 3625 ifmgd->auth_data->done = true; 3626 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3627 ifmgd->auth_data->timeout_started = true; 3628 run_again(sdata, ifmgd->auth_data->timeout); 3629 3630 /* move station state to auth */ 3631 mutex_lock(&sdata->local->sta_mtx); 3632 sta = sta_info_get(sdata, ap_addr); 3633 if (!sta) { 3634 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3635 result = false; 3636 goto out; 3637 } 3638 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3639 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3640 result = false; 3641 goto out; 3642 } 3643 3644 out: 3645 mutex_unlock(&sdata->local->sta_mtx); 3646 return result; 3647 } 3648 3649 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3650 struct ieee80211_mgmt *mgmt, size_t len) 3651 { 3652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3653 u16 auth_alg, auth_transaction, status_code; 3654 struct ieee80211_event event = { 3655 .type = MLME_EVENT, 3656 .u.mlme.data = AUTH_EVENT, 3657 }; 3658 struct ieee80211_prep_tx_info info = { 3659 .subtype = IEEE80211_STYPE_AUTH, 3660 }; 3661 3662 sdata_assert_lock(sdata); 3663 3664 if (len < 24 + 6) 3665 return; 3666 3667 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3668 return; 3669 3670 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3671 return; 3672 3673 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3674 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3675 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3676 3677 if (auth_alg != ifmgd->auth_data->algorithm || 3678 (auth_alg != WLAN_AUTH_SAE && 3679 auth_transaction != ifmgd->auth_data->expected_transaction) || 3680 (auth_alg == WLAN_AUTH_SAE && 3681 (auth_transaction < ifmgd->auth_data->expected_transaction || 3682 auth_transaction > 2))) { 3683 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3684 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3685 auth_transaction, 3686 ifmgd->auth_data->expected_transaction); 3687 goto notify_driver; 3688 } 3689 3690 if (status_code != WLAN_STATUS_SUCCESS) { 3691 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3692 3693 if (auth_alg == WLAN_AUTH_SAE && 3694 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3695 (auth_transaction == 1 && 3696 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3697 status_code == WLAN_STATUS_SAE_PK)))) { 3698 /* waiting for userspace now */ 3699 ifmgd->auth_data->waiting = true; 3700 ifmgd->auth_data->timeout = 3701 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3702 ifmgd->auth_data->timeout_started = true; 3703 run_again(sdata, ifmgd->auth_data->timeout); 3704 goto notify_driver; 3705 } 3706 3707 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3708 mgmt->sa, status_code); 3709 ieee80211_destroy_auth_data(sdata, false); 3710 event.u.mlme.status = MLME_DENIED; 3711 event.u.mlme.reason = status_code; 3712 drv_event_callback(sdata->local, sdata, &event); 3713 goto notify_driver; 3714 } 3715 3716 switch (ifmgd->auth_data->algorithm) { 3717 case WLAN_AUTH_OPEN: 3718 case WLAN_AUTH_LEAP: 3719 case WLAN_AUTH_FT: 3720 case WLAN_AUTH_SAE: 3721 case WLAN_AUTH_FILS_SK: 3722 case WLAN_AUTH_FILS_SK_PFS: 3723 case WLAN_AUTH_FILS_PK: 3724 break; 3725 case WLAN_AUTH_SHARED_KEY: 3726 if (ifmgd->auth_data->expected_transaction != 4) { 3727 ieee80211_auth_challenge(sdata, mgmt, len); 3728 /* need another frame */ 3729 return; 3730 } 3731 break; 3732 default: 3733 WARN_ONCE(1, "invalid auth alg %d", 3734 ifmgd->auth_data->algorithm); 3735 goto notify_driver; 3736 } 3737 3738 event.u.mlme.status = MLME_SUCCESS; 3739 info.success = 1; 3740 drv_event_callback(sdata->local, sdata, &event); 3741 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3742 (auth_transaction == 2 && 3743 ifmgd->auth_data->expected_transaction == 2)) { 3744 if (!ieee80211_mark_sta_auth(sdata)) 3745 return; /* ignore frame -- wait for timeout */ 3746 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3747 auth_transaction == 2) { 3748 sdata_info(sdata, "SAE peer confirmed\n"); 3749 ifmgd->auth_data->peer_confirmed = true; 3750 } 3751 3752 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3753 notify_driver: 3754 drv_mgd_complete_tx(sdata->local, sdata, &info); 3755 } 3756 3757 #define case_WLAN(type) \ 3758 case WLAN_REASON_##type: return #type 3759 3760 const char *ieee80211_get_reason_code_string(u16 reason_code) 3761 { 3762 switch (reason_code) { 3763 case_WLAN(UNSPECIFIED); 3764 case_WLAN(PREV_AUTH_NOT_VALID); 3765 case_WLAN(DEAUTH_LEAVING); 3766 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3767 case_WLAN(DISASSOC_AP_BUSY); 3768 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3769 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3770 case_WLAN(DISASSOC_STA_HAS_LEFT); 3771 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3772 case_WLAN(DISASSOC_BAD_POWER); 3773 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3774 case_WLAN(INVALID_IE); 3775 case_WLAN(MIC_FAILURE); 3776 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3777 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3778 case_WLAN(IE_DIFFERENT); 3779 case_WLAN(INVALID_GROUP_CIPHER); 3780 case_WLAN(INVALID_PAIRWISE_CIPHER); 3781 case_WLAN(INVALID_AKMP); 3782 case_WLAN(UNSUPP_RSN_VERSION); 3783 case_WLAN(INVALID_RSN_IE_CAP); 3784 case_WLAN(IEEE8021X_FAILED); 3785 case_WLAN(CIPHER_SUITE_REJECTED); 3786 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3787 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3788 case_WLAN(DISASSOC_LOW_ACK); 3789 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3790 case_WLAN(QSTA_LEAVE_QBSS); 3791 case_WLAN(QSTA_NOT_USE); 3792 case_WLAN(QSTA_REQUIRE_SETUP); 3793 case_WLAN(QSTA_TIMEOUT); 3794 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3795 case_WLAN(MESH_PEER_CANCELED); 3796 case_WLAN(MESH_MAX_PEERS); 3797 case_WLAN(MESH_CONFIG); 3798 case_WLAN(MESH_CLOSE); 3799 case_WLAN(MESH_MAX_RETRIES); 3800 case_WLAN(MESH_CONFIRM_TIMEOUT); 3801 case_WLAN(MESH_INVALID_GTK); 3802 case_WLAN(MESH_INCONSISTENT_PARAM); 3803 case_WLAN(MESH_INVALID_SECURITY); 3804 case_WLAN(MESH_PATH_ERROR); 3805 case_WLAN(MESH_PATH_NOFORWARD); 3806 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3807 case_WLAN(MAC_EXISTS_IN_MBSS); 3808 case_WLAN(MESH_CHAN_REGULATORY); 3809 case_WLAN(MESH_CHAN); 3810 default: return "<unknown>"; 3811 } 3812 } 3813 3814 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3815 struct ieee80211_mgmt *mgmt, size_t len) 3816 { 3817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3818 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3819 3820 sdata_assert_lock(sdata); 3821 3822 if (len < 24 + 2) 3823 return; 3824 3825 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3826 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3827 return; 3828 } 3829 3830 if (ifmgd->associated && 3831 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3832 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3833 sdata->vif.cfg.ap_addr, reason_code, 3834 ieee80211_get_reason_code_string(reason_code)); 3835 3836 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3837 3838 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3839 reason_code, false); 3840 return; 3841 } 3842 3843 if (ifmgd->assoc_data && 3844 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3845 sdata_info(sdata, 3846 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3847 ifmgd->assoc_data->ap_addr, reason_code, 3848 ieee80211_get_reason_code_string(reason_code)); 3849 3850 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3851 3852 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3853 return; 3854 } 3855 } 3856 3857 3858 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3859 struct ieee80211_mgmt *mgmt, size_t len) 3860 { 3861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3862 u16 reason_code; 3863 3864 sdata_assert_lock(sdata); 3865 3866 if (len < 24 + 2) 3867 return; 3868 3869 if (!ifmgd->associated || 3870 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3871 return; 3872 3873 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3874 3875 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3876 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3877 return; 3878 } 3879 3880 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3881 sdata->vif.cfg.ap_addr, reason_code, 3882 ieee80211_get_reason_code_string(reason_code)); 3883 3884 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3885 3886 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3887 false); 3888 } 3889 3890 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3891 u8 *supp_rates, unsigned int supp_rates_len, 3892 u32 *rates, u32 *basic_rates, 3893 bool *have_higher_than_11mbit, 3894 int *min_rate, int *min_rate_index, 3895 int shift) 3896 { 3897 int i, j; 3898 3899 for (i = 0; i < supp_rates_len; i++) { 3900 int rate = supp_rates[i] & 0x7f; 3901 bool is_basic = !!(supp_rates[i] & 0x80); 3902 3903 if ((rate * 5 * (1 << shift)) > 110) 3904 *have_higher_than_11mbit = true; 3905 3906 /* 3907 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 3908 * selectors since they're not rates. 3909 * 3910 * Note: Even though the membership selector and the basic 3911 * rate flag share the same bit, they are not exactly 3912 * the same. 3913 */ 3914 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3915 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3916 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3917 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 3918 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3919 continue; 3920 3921 for (j = 0; j < sband->n_bitrates; j++) { 3922 struct ieee80211_rate *br; 3923 int brate; 3924 3925 br = &sband->bitrates[j]; 3926 3927 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3928 if (brate == rate) { 3929 *rates |= BIT(j); 3930 if (is_basic) 3931 *basic_rates |= BIT(j); 3932 if ((rate * 5) < *min_rate) { 3933 *min_rate = rate * 5; 3934 *min_rate_index = j; 3935 } 3936 break; 3937 } 3938 } 3939 } 3940 } 3941 3942 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3943 struct ieee80211_supported_band *sband, 3944 const struct link_sta_info *link_sta, 3945 const struct ieee802_11_elems *elems) 3946 { 3947 const struct ieee80211_sta_he_cap *own_he_cap = 3948 ieee80211_get_he_iftype_cap(sband, 3949 ieee80211_vif_type_p2p(&sdata->vif)); 3950 3951 if (elems->ext_capab_len < 10) 3952 return false; 3953 3954 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3955 return false; 3956 3957 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3958 IEEE80211_HE_MAC_CAP0_TWT_RES && 3959 own_he_cap && 3960 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3961 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3962 } 3963 3964 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3965 struct ieee80211_supported_band *sband, 3966 struct ieee80211_link_data *link, 3967 struct link_sta_info *link_sta, 3968 struct ieee802_11_elems *elems) 3969 { 3970 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3971 3972 if (link->conf->twt_requester != twt) { 3973 link->conf->twt_requester = twt; 3974 return BSS_CHANGED_TWT; 3975 } 3976 return 0; 3977 } 3978 3979 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3980 struct ieee80211_bss_conf *bss_conf, 3981 struct ieee80211_supported_band *sband, 3982 struct link_sta_info *link_sta) 3983 { 3984 const struct ieee80211_sta_he_cap *own_he_cap = 3985 ieee80211_get_he_iftype_cap(sband, 3986 ieee80211_vif_type_p2p(&sdata->vif)); 3987 3988 return bss_conf->he_support && 3989 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3990 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3991 own_he_cap && 3992 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3993 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3994 } 3995 3996 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3997 struct link_sta_info *link_sta, 3998 struct cfg80211_bss *cbss, 3999 struct ieee80211_mgmt *mgmt, 4000 const u8 *elem_start, 4001 unsigned int elem_len, 4002 u64 *changed) 4003 { 4004 struct ieee80211_sub_if_data *sdata = link->sdata; 4005 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4006 struct ieee80211_bss_conf *bss_conf = link->conf; 4007 struct ieee80211_local *local = sdata->local; 4008 unsigned int link_id = link->link_id; 4009 struct ieee80211_elems_parse_params parse_params = { 4010 .start = elem_start, 4011 .len = elem_len, 4012 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4013 .from_ap = true, 4014 }; 4015 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4016 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4017 const struct cfg80211_bss_ies *bss_ies = NULL; 4018 struct ieee80211_supported_band *sband; 4019 struct ieee802_11_elems *elems; 4020 u16 capab_info; 4021 bool ret; 4022 4023 elems = ieee802_11_parse_elems_full(&parse_params); 4024 if (!elems) 4025 return false; 4026 4027 if (link_id == assoc_data->assoc_link_id) { 4028 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4029 4030 /* 4031 * we should not get to this flow unless the association was 4032 * successful, so set the status directly to success 4033 */ 4034 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4035 } else if (!elems->prof) { 4036 ret = false; 4037 goto out; 4038 } else { 4039 const u8 *ptr = elems->prof->variable + 4040 elems->prof->sta_info_len - 1; 4041 4042 /* 4043 * During parsing, we validated that these fields exist, 4044 * otherwise elems->prof would have been set to NULL. 4045 */ 4046 capab_info = get_unaligned_le16(ptr); 4047 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4048 4049 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4050 link_info(link, "association response status code=%u\n", 4051 assoc_data->link[link_id].status); 4052 ret = true; 4053 goto out; 4054 } 4055 } 4056 4057 if (!is_s1g && !elems->supp_rates) { 4058 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4059 ret = false; 4060 goto out; 4061 } 4062 4063 link->u.mgd.tdls_chan_switch_prohibited = 4064 elems->ext_capab && elems->ext_capab_len >= 5 && 4065 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4066 4067 /* 4068 * Some APs are erroneously not including some information in their 4069 * (re)association response frames. Try to recover by using the data 4070 * from the beacon or probe response. This seems to afflict mobile 4071 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4072 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4073 */ 4074 if (!is_6ghz && 4075 ((assoc_data->wmm && !elems->wmm_param) || 4076 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4077 (!elems->ht_cap_elem || !elems->ht_operation)) || 4078 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4079 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4080 const struct cfg80211_bss_ies *ies; 4081 struct ieee802_11_elems *bss_elems; 4082 4083 rcu_read_lock(); 4084 ies = rcu_dereference(cbss->ies); 4085 if (ies) 4086 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4087 GFP_ATOMIC); 4088 rcu_read_unlock(); 4089 if (!bss_ies) { 4090 ret = false; 4091 goto out; 4092 } 4093 4094 parse_params.start = bss_ies->data; 4095 parse_params.len = bss_ies->len; 4096 parse_params.bss = cbss; 4097 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4098 if (!bss_elems) { 4099 ret = false; 4100 goto out; 4101 } 4102 4103 if (assoc_data->wmm && 4104 !elems->wmm_param && bss_elems->wmm_param) { 4105 elems->wmm_param = bss_elems->wmm_param; 4106 sdata_info(sdata, 4107 "AP bug: WMM param missing from AssocResp\n"); 4108 } 4109 4110 /* 4111 * Also check if we requested HT/VHT, otherwise the AP doesn't 4112 * have to include the IEs in the (re)association response. 4113 */ 4114 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4115 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4116 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4117 sdata_info(sdata, 4118 "AP bug: HT capability missing from AssocResp\n"); 4119 } 4120 if (!elems->ht_operation && bss_elems->ht_operation && 4121 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4122 elems->ht_operation = bss_elems->ht_operation; 4123 sdata_info(sdata, 4124 "AP bug: HT operation missing from AssocResp\n"); 4125 } 4126 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4127 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4128 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4129 sdata_info(sdata, 4130 "AP bug: VHT capa missing from AssocResp\n"); 4131 } 4132 if (!elems->vht_operation && bss_elems->vht_operation && 4133 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4134 elems->vht_operation = bss_elems->vht_operation; 4135 sdata_info(sdata, 4136 "AP bug: VHT operation missing from AssocResp\n"); 4137 } 4138 4139 kfree(bss_elems); 4140 } 4141 4142 /* 4143 * We previously checked these in the beacon/probe response, so 4144 * they should be present here. This is just a safety net. 4145 */ 4146 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4147 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4148 sdata_info(sdata, 4149 "HT AP is missing WMM params or HT capability/operation\n"); 4150 ret = false; 4151 goto out; 4152 } 4153 4154 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4155 (!elems->vht_cap_elem || !elems->vht_operation)) { 4156 sdata_info(sdata, 4157 "VHT AP is missing VHT capability/operation\n"); 4158 ret = false; 4159 goto out; 4160 } 4161 4162 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4163 !elems->he_6ghz_capa) { 4164 sdata_info(sdata, 4165 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4166 ret = false; 4167 goto out; 4168 } 4169 4170 if (WARN_ON(!link->conf->chandef.chan)) { 4171 ret = false; 4172 goto out; 4173 } 4174 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4175 4176 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4177 (!elems->he_cap || !elems->he_operation)) { 4178 sdata_info(sdata, 4179 "HE AP is missing HE capability/operation\n"); 4180 ret = false; 4181 goto out; 4182 } 4183 4184 /* Set up internal HT/VHT capabilities */ 4185 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4186 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4187 elems->ht_cap_elem, 4188 link_sta); 4189 4190 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4191 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4192 elems->vht_cap_elem, 4193 link_sta); 4194 4195 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4196 elems->he_cap) { 4197 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4198 elems->he_cap, 4199 elems->he_cap_len, 4200 elems->he_6ghz_capa, 4201 link_sta); 4202 4203 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4204 if (elems->rsnx && elems->rsnx_len && 4205 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4206 wiphy_ext_feature_isset(local->hw.wiphy, 4207 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4208 bss_conf->twt_protected = true; 4209 else 4210 bss_conf->twt_protected = false; 4211 4212 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4213 link_sta, elems); 4214 4215 if (elems->eht_operation && elems->eht_cap && 4216 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4217 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4218 elems->he_cap, 4219 elems->he_cap_len, 4220 elems->eht_cap, 4221 elems->eht_cap_len, 4222 link_sta); 4223 4224 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4225 *changed |= BSS_CHANGED_EHT_PUNCTURING; 4226 } else { 4227 bss_conf->eht_support = false; 4228 } 4229 } else { 4230 bss_conf->he_support = false; 4231 bss_conf->twt_requester = false; 4232 bss_conf->twt_protected = false; 4233 bss_conf->eht_support = false; 4234 } 4235 4236 bss_conf->twt_broadcast = 4237 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4238 4239 if (bss_conf->he_support) { 4240 bss_conf->he_bss_color.color = 4241 le32_get_bits(elems->he_operation->he_oper_params, 4242 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4243 bss_conf->he_bss_color.partial = 4244 le32_get_bits(elems->he_operation->he_oper_params, 4245 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4246 bss_conf->he_bss_color.enabled = 4247 !le32_get_bits(elems->he_operation->he_oper_params, 4248 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4249 4250 if (bss_conf->he_bss_color.enabled) 4251 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4252 4253 bss_conf->htc_trig_based_pkt_ext = 4254 le32_get_bits(elems->he_operation->he_oper_params, 4255 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4256 bss_conf->frame_time_rts_th = 4257 le32_get_bits(elems->he_operation->he_oper_params, 4258 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4259 4260 bss_conf->uora_exists = !!elems->uora_element; 4261 if (elems->uora_element) 4262 bss_conf->uora_ocw_range = elems->uora_element[0]; 4263 4264 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4265 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4266 /* TODO: OPEN: what happens if BSS color disable is set? */ 4267 } 4268 4269 if (cbss->transmitted_bss) { 4270 bss_conf->nontransmitted = true; 4271 ether_addr_copy(bss_conf->transmitter_bssid, 4272 cbss->transmitted_bss->bssid); 4273 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4274 bss_conf->bssid_index = cbss->bssid_index; 4275 } 4276 4277 /* 4278 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4279 * in their association response, so ignore that data for our own 4280 * configuration. If it changed since the last beacon, we'll get the 4281 * next beacon and update then. 4282 */ 4283 4284 /* 4285 * If an operating mode notification IE is present, override the 4286 * NSS calculation (that would be done in rate_control_rate_init()) 4287 * and use the # of streams from that element. 4288 */ 4289 if (elems->opmode_notif && 4290 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4291 u8 nss; 4292 4293 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4294 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4295 nss += 1; 4296 link_sta->pub->rx_nss = nss; 4297 } 4298 4299 /* 4300 * Always handle WMM once after association regardless 4301 * of the first value the AP uses. Setting -1 here has 4302 * that effect because the AP values is an unsigned 4303 * 4-bit value. 4304 */ 4305 link->u.mgd.wmm_last_param_set = -1; 4306 link->u.mgd.mu_edca_last_param_set = -1; 4307 4308 if (link->u.mgd.disable_wmm_tracking) { 4309 ieee80211_set_wmm_default(link, false, false); 4310 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4311 elems->wmm_param_len, 4312 elems->mu_edca_param_set)) { 4313 /* still enable QoS since we might have HT/VHT */ 4314 ieee80211_set_wmm_default(link, false, true); 4315 /* disable WMM tracking in this case to disable 4316 * tracking WMM parameter changes in the beacon if 4317 * the parameters weren't actually valid. Doing so 4318 * avoids changing parameters very strangely when 4319 * the AP is going back and forth between valid and 4320 * invalid parameters. 4321 */ 4322 link->u.mgd.disable_wmm_tracking = true; 4323 } 4324 4325 if (elems->max_idle_period_ie) { 4326 bss_conf->max_idle_period = 4327 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4328 bss_conf->protected_keep_alive = 4329 !!(elems->max_idle_period_ie->idle_options & 4330 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4331 *changed |= BSS_CHANGED_KEEP_ALIVE; 4332 } else { 4333 bss_conf->max_idle_period = 0; 4334 bss_conf->protected_keep_alive = false; 4335 } 4336 4337 /* set assoc capability (AID was already set earlier), 4338 * ieee80211_set_associated() will tell the driver */ 4339 bss_conf->assoc_capability = capab_info; 4340 4341 ret = true; 4342 out: 4343 kfree(elems); 4344 kfree(bss_ies); 4345 return ret; 4346 } 4347 4348 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4349 struct sta_info *sta, 4350 struct link_sta_info *link_sta, 4351 struct cfg80211_bss *cbss) 4352 { 4353 struct ieee80211_sub_if_data *sdata = link->sdata; 4354 struct ieee80211_local *local = sdata->local; 4355 struct ieee80211_bss *bss = (void *)cbss->priv; 4356 u32 rates = 0, basic_rates = 0; 4357 bool have_higher_than_11mbit = false; 4358 int min_rate = INT_MAX, min_rate_index = -1; 4359 /* this is clearly wrong for MLO but we'll just remove it later */ 4360 int shift = ieee80211_vif_get_shift(&sdata->vif); 4361 struct ieee80211_supported_band *sband; 4362 4363 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4364 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4365 4366 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4367 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4368 ieee80211_s1g_sta_rate_init(sta); 4369 return 0; 4370 } 4371 4372 sband = local->hw.wiphy->bands[cbss->channel->band]; 4373 4374 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4375 &rates, &basic_rates, &have_higher_than_11mbit, 4376 &min_rate, &min_rate_index, shift); 4377 4378 /* 4379 * This used to be a workaround for basic rates missing 4380 * in the association response frame. Now that we no 4381 * longer use the basic rates from there, it probably 4382 * doesn't happen any more, but keep the workaround so 4383 * in case some *other* APs are buggy in different ways 4384 * we can connect -- with a warning. 4385 * Allow this workaround only in case the AP provided at least 4386 * one rate. 4387 */ 4388 if (min_rate_index < 0) { 4389 link_info(link, "No legacy rates in association response\n"); 4390 return -EINVAL; 4391 } else if (!basic_rates) { 4392 link_info(link, "No basic rates, using min rate instead\n"); 4393 basic_rates = BIT(min_rate_index); 4394 } 4395 4396 if (rates) 4397 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4398 else 4399 link_info(link, "No rates found, keeping mandatory only\n"); 4400 4401 link->conf->basic_rates = basic_rates; 4402 4403 /* cf. IEEE 802.11 9.2.12 */ 4404 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4405 have_higher_than_11mbit; 4406 4407 return 0; 4408 } 4409 4410 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4411 struct cfg80211_bss *cbss) 4412 { 4413 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4414 const struct element *ht_cap_elem, *vht_cap_elem; 4415 const struct cfg80211_bss_ies *ies; 4416 const struct ieee80211_ht_cap *ht_cap; 4417 const struct ieee80211_vht_cap *vht_cap; 4418 const struct ieee80211_he_cap_elem *he_cap; 4419 const struct element *he_cap_elem; 4420 u16 mcs_80_map, mcs_160_map; 4421 int i, mcs_nss_size; 4422 bool support_160; 4423 u8 chains = 1; 4424 4425 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4426 return chains; 4427 4428 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4429 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4430 ht_cap = (void *)ht_cap_elem->data; 4431 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4432 /* 4433 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4434 * "Tx Unequal Modulation Supported" fields. 4435 */ 4436 } 4437 4438 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4439 return chains; 4440 4441 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4442 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4443 u8 nss; 4444 u16 tx_mcs_map; 4445 4446 vht_cap = (void *)vht_cap_elem->data; 4447 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4448 for (nss = 8; nss > 0; nss--) { 4449 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4450 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4451 break; 4452 } 4453 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4454 chains = max(chains, nss); 4455 } 4456 4457 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4458 return chains; 4459 4460 ies = rcu_dereference(cbss->ies); 4461 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4462 ies->data, ies->len); 4463 4464 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4465 return chains; 4466 4467 /* skip one byte ext_tag_id */ 4468 he_cap = (void *)(he_cap_elem->data + 1); 4469 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4470 4471 /* invalid HE IE */ 4472 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4473 return chains; 4474 4475 /* mcs_nss is right after he_cap info */ 4476 he_mcs_nss_supp = (void *)(he_cap + 1); 4477 4478 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4479 4480 for (i = 7; i >= 0; i--) { 4481 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4482 4483 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4484 chains = max_t(u8, chains, i + 1); 4485 break; 4486 } 4487 } 4488 4489 support_160 = he_cap->phy_cap_info[0] & 4490 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4491 4492 if (!support_160) 4493 return chains; 4494 4495 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4496 for (i = 7; i >= 0; i--) { 4497 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4498 4499 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4500 chains = max_t(u8, chains, i + 1); 4501 break; 4502 } 4503 } 4504 4505 return chains; 4506 } 4507 4508 static bool 4509 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4510 const struct cfg80211_bss_ies *ies, 4511 const struct ieee80211_he_operation *he_op) 4512 { 4513 const struct element *he_cap_elem; 4514 const struct ieee80211_he_cap_elem *he_cap; 4515 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4516 u16 mcs_80_map_tx, mcs_80_map_rx; 4517 u16 ap_min_req_set; 4518 int mcs_nss_size; 4519 int nss; 4520 4521 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4522 ies->data, ies->len); 4523 4524 if (!he_cap_elem) 4525 return false; 4526 4527 /* invalid HE IE */ 4528 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4529 sdata_info(sdata, 4530 "Invalid HE elem, Disable HE\n"); 4531 return false; 4532 } 4533 4534 /* skip one byte ext_tag_id */ 4535 he_cap = (void *)(he_cap_elem->data + 1); 4536 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4537 4538 /* invalid HE IE */ 4539 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4540 sdata_info(sdata, 4541 "Invalid HE elem with nss size, Disable HE\n"); 4542 return false; 4543 } 4544 4545 /* mcs_nss is right after he_cap info */ 4546 he_mcs_nss_supp = (void *)(he_cap + 1); 4547 4548 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4549 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4550 4551 /* P802.11-REVme/D0.3 4552 * 27.1.1 Introduction to the HE PHY 4553 * ... 4554 * An HE STA shall support the following features: 4555 * ... 4556 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4557 * supported channel widths for HE SU PPDUs 4558 */ 4559 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4560 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4561 sdata_info(sdata, 4562 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4563 mcs_80_map_tx, mcs_80_map_rx); 4564 return false; 4565 } 4566 4567 if (!he_op) 4568 return true; 4569 4570 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4571 4572 /* 4573 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4574 * zeroes, which is nonsense, and completely inconsistent with itself 4575 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4576 */ 4577 if (!ap_min_req_set) 4578 return true; 4579 4580 /* make sure the AP is consistent with itself 4581 * 4582 * P802.11-REVme/D0.3 4583 * 26.17.1 Basic HE BSS operation 4584 * 4585 * A STA that is operating in an HE BSS shall be able to receive and 4586 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4587 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4588 * MLME-START.request primitive and shall be able to receive at each of 4589 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4590 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4591 * primitive 4592 */ 4593 for (nss = 8; nss > 0; nss--) { 4594 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4595 u8 ap_rx_val; 4596 u8 ap_tx_val; 4597 4598 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4599 continue; 4600 4601 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4602 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4603 4604 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4605 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4606 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4607 sdata_info(sdata, 4608 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4609 nss, ap_rx_val, ap_rx_val, ap_op_val); 4610 return false; 4611 } 4612 } 4613 4614 return true; 4615 } 4616 4617 static bool 4618 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4619 struct ieee80211_supported_band *sband, 4620 const struct ieee80211_he_operation *he_op) 4621 { 4622 const struct ieee80211_sta_he_cap *sta_he_cap = 4623 ieee80211_get_he_iftype_cap(sband, 4624 ieee80211_vif_type_p2p(&sdata->vif)); 4625 u16 ap_min_req_set; 4626 int i; 4627 4628 if (!sta_he_cap || !he_op) 4629 return false; 4630 4631 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4632 4633 /* 4634 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4635 * zeroes, which is nonsense, and completely inconsistent with itself 4636 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4637 */ 4638 if (!ap_min_req_set) 4639 return true; 4640 4641 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4642 for (i = 0; i < 3; i++) { 4643 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4644 &sta_he_cap->he_mcs_nss_supp; 4645 u16 sta_mcs_map_rx = 4646 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4647 u16 sta_mcs_map_tx = 4648 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4649 u8 nss; 4650 bool verified = true; 4651 4652 /* 4653 * For each band there is a maximum of 8 spatial streams 4654 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4655 * of 2 bits per NSS (1-8), with the values defined in enum 4656 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4657 * capabilities aren't less than the AP's minimum requirements 4658 * for this HE BSS per SS. 4659 * It is enough to find one such band that meets the reqs. 4660 */ 4661 for (nss = 8; nss > 0; nss--) { 4662 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4663 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4664 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4665 4666 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4667 continue; 4668 4669 /* 4670 * Make sure the HE AP doesn't require MCSs that aren't 4671 * supported by the client as required by spec 4672 * 4673 * P802.11-REVme/D0.3 4674 * 26.17.1 Basic HE BSS operation 4675 * 4676 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4677 * a BSS, unless it supports (i.e., is able to both transmit and 4678 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4679 * HE-MCS and NSS set. 4680 */ 4681 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4682 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4683 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4684 verified = false; 4685 break; 4686 } 4687 } 4688 4689 if (verified) 4690 return true; 4691 } 4692 4693 /* If here, STA doesn't meet AP's HE min requirements */ 4694 return false; 4695 } 4696 4697 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4698 struct ieee80211_link_data *link, 4699 struct cfg80211_bss *cbss, 4700 ieee80211_conn_flags_t *conn_flags) 4701 { 4702 struct ieee80211_local *local = sdata->local; 4703 const struct ieee80211_ht_cap *ht_cap = NULL; 4704 const struct ieee80211_ht_operation *ht_oper = NULL; 4705 const struct ieee80211_vht_operation *vht_oper = NULL; 4706 const struct ieee80211_he_operation *he_oper = NULL; 4707 const struct ieee80211_eht_operation *eht_oper = NULL; 4708 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4709 struct ieee80211_supported_band *sband; 4710 struct cfg80211_chan_def chandef; 4711 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4712 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4713 struct ieee80211_bss *bss = (void *)cbss->priv; 4714 struct ieee80211_elems_parse_params parse_params = { 4715 .bss = cbss, 4716 .link_id = -1, 4717 .from_ap = true, 4718 }; 4719 struct ieee802_11_elems *elems; 4720 const struct cfg80211_bss_ies *ies; 4721 int ret; 4722 u32 i; 4723 bool have_80mhz; 4724 4725 rcu_read_lock(); 4726 4727 ies = rcu_dereference(cbss->ies); 4728 parse_params.start = ies->data; 4729 parse_params.len = ies->len; 4730 elems = ieee802_11_parse_elems_full(&parse_params); 4731 if (!elems) { 4732 rcu_read_unlock(); 4733 return -ENOMEM; 4734 } 4735 4736 sband = local->hw.wiphy->bands[cbss->channel->band]; 4737 4738 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4739 IEEE80211_CONN_DISABLE_80P80MHZ | 4740 IEEE80211_CONN_DISABLE_160MHZ); 4741 4742 /* disable HT/VHT/HE if we don't support them */ 4743 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4744 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4745 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4746 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4747 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4748 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4749 } 4750 4751 if (!sband->vht_cap.vht_supported && is_5ghz) { 4752 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4753 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4754 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4755 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4756 } 4757 4758 if (!ieee80211_get_he_iftype_cap(sband, 4759 ieee80211_vif_type_p2p(&sdata->vif))) { 4760 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4761 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4762 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4763 } 4764 4765 if (!ieee80211_get_eht_iftype_cap(sband, 4766 ieee80211_vif_type_p2p(&sdata->vif))) { 4767 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4768 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4769 } 4770 4771 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4772 ht_oper = elems->ht_operation; 4773 ht_cap = elems->ht_cap_elem; 4774 4775 if (!ht_cap) { 4776 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4777 ht_oper = NULL; 4778 } 4779 } 4780 4781 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4782 vht_oper = elems->vht_operation; 4783 if (vht_oper && !ht_oper) { 4784 vht_oper = NULL; 4785 sdata_info(sdata, 4786 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4787 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4788 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4789 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4790 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4791 } 4792 4793 if (!elems->vht_cap_elem) { 4794 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4795 vht_oper = NULL; 4796 } 4797 } 4798 4799 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4800 he_oper = elems->he_operation; 4801 4802 if (link && is_6ghz) { 4803 struct ieee80211_bss_conf *bss_conf; 4804 u8 j = 0; 4805 4806 bss_conf = link->conf; 4807 4808 if (elems->pwr_constr_elem) 4809 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4810 4811 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4812 ARRAY_SIZE(elems->tx_pwr_env)); 4813 4814 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4815 if (elems->tx_pwr_env_len[i] > 4816 sizeof(bss_conf->tx_pwr_env[j])) 4817 continue; 4818 4819 bss_conf->tx_pwr_env_num++; 4820 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4821 elems->tx_pwr_env_len[i]); 4822 j++; 4823 } 4824 } 4825 4826 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4827 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4828 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4829 IEEE80211_CONN_DISABLE_EHT; 4830 } 4831 4832 /* 4833 * EHT requires HE to be supported as well. Specifically for 6 GHz 4834 * channels, the operation channel information can only be deduced from 4835 * both the 6 GHz operation information (from the HE operation IE) and 4836 * EHT operation. 4837 */ 4838 if (!(*conn_flags & 4839 (IEEE80211_CONN_DISABLE_HE | 4840 IEEE80211_CONN_DISABLE_EHT)) && 4841 he_oper) { 4842 const struct cfg80211_bss_ies *cbss_ies; 4843 const struct element *eht_ml_elem; 4844 const u8 *eht_oper_ie; 4845 4846 cbss_ies = rcu_dereference(cbss->ies); 4847 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4848 cbss_ies->data, cbss_ies->len); 4849 if (eht_oper_ie && eht_oper_ie[1] >= 4850 1 + sizeof(struct ieee80211_eht_operation)) 4851 eht_oper = (void *)(eht_oper_ie + 3); 4852 else 4853 eht_oper = NULL; 4854 4855 eht_ml_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 4856 cbss_ies->data, cbss_ies->len); 4857 4858 /* data + 1 / datalen - 1 since it's an extended element */ 4859 if (eht_ml_elem && 4860 ieee80211_mle_size_ok(eht_ml_elem->data + 1, 4861 eht_ml_elem->datalen - 1)) { 4862 sdata->vif.cfg.eml_cap = 4863 ieee80211_mle_get_eml_cap(eht_ml_elem->data + 1); 4864 sdata->vif.cfg.eml_med_sync_delay = 4865 ieee80211_mle_get_eml_med_sync_delay(eht_ml_elem->data + 1); 4866 } 4867 } 4868 4869 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4870 have_80mhz = false; 4871 for (i = 0; i < sband->n_channels; i++) { 4872 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4873 IEEE80211_CHAN_NO_80MHZ)) 4874 continue; 4875 4876 have_80mhz = true; 4877 break; 4878 } 4879 4880 if (!have_80mhz) { 4881 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4882 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4883 } 4884 4885 if (sband->band == NL80211_BAND_S1GHZ) { 4886 s1g_oper = elems->s1g_oper; 4887 if (!s1g_oper) 4888 sdata_info(sdata, 4889 "AP missing S1G operation element?\n"); 4890 } 4891 4892 *conn_flags |= 4893 ieee80211_determine_chantype(sdata, link, *conn_flags, 4894 sband, 4895 cbss->channel, 4896 bss->vht_cap_info, 4897 ht_oper, vht_oper, 4898 he_oper, eht_oper, 4899 s1g_oper, 4900 &chandef, false); 4901 4902 if (link) 4903 link->needed_rx_chains = 4904 min(ieee80211_max_rx_chains(link, cbss), 4905 local->rx_chains); 4906 4907 rcu_read_unlock(); 4908 /* the element data was RCU protected so no longer valid anyway */ 4909 kfree(elems); 4910 elems = NULL; 4911 4912 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4913 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4914 return -EINVAL; 4915 } 4916 4917 if (!link) 4918 return 0; 4919 4920 /* will change later if needed */ 4921 link->smps_mode = IEEE80211_SMPS_OFF; 4922 4923 mutex_lock(&local->mtx); 4924 /* 4925 * If this fails (possibly due to channel context sharing 4926 * on incompatible channels, e.g. 80+80 and 160 sharing the 4927 * same control channel) try to use a smaller bandwidth. 4928 */ 4929 ret = ieee80211_link_use_channel(link, &chandef, 4930 IEEE80211_CHANCTX_SHARED); 4931 4932 /* don't downgrade for 5 and 10 MHz channels, though. */ 4933 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4934 chandef.width == NL80211_CHAN_WIDTH_10) 4935 goto out; 4936 4937 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4938 *conn_flags |= 4939 ieee80211_chandef_downgrade(&chandef); 4940 ret = ieee80211_link_use_channel(link, &chandef, 4941 IEEE80211_CHANCTX_SHARED); 4942 } 4943 out: 4944 mutex_unlock(&local->mtx); 4945 return ret; 4946 } 4947 4948 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4949 u8 *dtim_count, u8 *dtim_period) 4950 { 4951 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4952 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4953 ies->len); 4954 const struct ieee80211_tim_ie *tim = NULL; 4955 const struct ieee80211_bssid_index *idx; 4956 bool valid = tim_ie && tim_ie[1] >= 2; 4957 4958 if (valid) 4959 tim = (void *)(tim_ie + 2); 4960 4961 if (dtim_count) 4962 *dtim_count = valid ? tim->dtim_count : 0; 4963 4964 if (dtim_period) 4965 *dtim_period = valid ? tim->dtim_period : 0; 4966 4967 /* Check if value is overridden by non-transmitted profile */ 4968 if (!idx_ie || idx_ie[1] < 3) 4969 return valid; 4970 4971 idx = (void *)(idx_ie + 2); 4972 4973 if (dtim_count) 4974 *dtim_count = idx->dtim_count; 4975 4976 if (dtim_period) 4977 *dtim_period = idx->dtim_period; 4978 4979 return true; 4980 } 4981 4982 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4983 struct ieee80211_mgmt *mgmt, 4984 struct ieee802_11_elems *elems, 4985 const u8 *elem_start, unsigned int elem_len) 4986 { 4987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4988 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4989 struct ieee80211_local *local = sdata->local; 4990 unsigned int link_id; 4991 struct sta_info *sta; 4992 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4993 u16 valid_links = 0; 4994 int err; 4995 4996 mutex_lock(&sdata->local->sta_mtx); 4997 /* 4998 * station info was already allocated and inserted before 4999 * the association and should be available to us 5000 */ 5001 sta = sta_info_get(sdata, assoc_data->ap_addr); 5002 if (WARN_ON(!sta)) 5003 goto out_err; 5004 5005 if (sdata->vif.valid_links) { 5006 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5007 if (!assoc_data->link[link_id].bss) 5008 continue; 5009 valid_links |= BIT(link_id); 5010 5011 if (link_id != assoc_data->assoc_link_id) { 5012 err = ieee80211_sta_allocate_link(sta, link_id); 5013 if (err) 5014 goto out_err; 5015 } 5016 } 5017 5018 ieee80211_vif_set_links(sdata, valid_links); 5019 } 5020 5021 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5022 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5023 struct ieee80211_link_data *link; 5024 struct link_sta_info *link_sta; 5025 5026 if (!cbss) 5027 continue; 5028 5029 link = sdata_dereference(sdata->link[link_id], sdata); 5030 if (WARN_ON(!link)) 5031 goto out_err; 5032 5033 if (sdata->vif.valid_links) 5034 link_info(link, 5035 "local address %pM, AP link address %pM%s\n", 5036 link->conf->addr, 5037 assoc_data->link[link_id].bss->bssid, 5038 link_id == assoc_data->assoc_link_id ? 5039 " (assoc)" : ""); 5040 5041 link_sta = rcu_dereference_protected(sta->link[link_id], 5042 lockdep_is_held(&local->sta_mtx)); 5043 if (WARN_ON(!link_sta)) 5044 goto out_err; 5045 5046 if (!link->u.mgd.have_beacon) { 5047 const struct cfg80211_bss_ies *ies; 5048 5049 rcu_read_lock(); 5050 ies = rcu_dereference(cbss->beacon_ies); 5051 if (ies) 5052 link->u.mgd.have_beacon = true; 5053 else 5054 ies = rcu_dereference(cbss->ies); 5055 ieee80211_get_dtim(ies, 5056 &link->conf->sync_dtim_count, 5057 &link->u.mgd.dtim_period); 5058 link->conf->beacon_int = cbss->beacon_interval; 5059 rcu_read_unlock(); 5060 } 5061 5062 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5063 5064 if (link_id != assoc_data->assoc_link_id) { 5065 err = ieee80211_prep_channel(sdata, link, cbss, 5066 &link->u.mgd.conn_flags); 5067 if (err) { 5068 link_info(link, "prep_channel failed\n"); 5069 goto out_err; 5070 } 5071 } 5072 5073 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5074 assoc_data->link[link_id].bss); 5075 if (err) 5076 goto out_err; 5077 5078 if (!ieee80211_assoc_config_link(link, link_sta, 5079 assoc_data->link[link_id].bss, 5080 mgmt, elem_start, elem_len, 5081 &changed[link_id])) 5082 goto out_err; 5083 5084 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5085 valid_links &= ~BIT(link_id); 5086 ieee80211_sta_remove_link(sta, link_id); 5087 continue; 5088 } 5089 5090 if (link_id != assoc_data->assoc_link_id) { 5091 err = ieee80211_sta_activate_link(sta, link_id); 5092 if (err) 5093 goto out_err; 5094 } 5095 } 5096 5097 /* links might have changed due to rejected ones, set them again */ 5098 ieee80211_vif_set_links(sdata, valid_links); 5099 5100 rate_control_rate_init(sta); 5101 5102 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5103 set_sta_flag(sta, WLAN_STA_MFP); 5104 sta->sta.mfp = true; 5105 } else { 5106 sta->sta.mfp = false; 5107 } 5108 5109 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5110 elems->ext_capab_len); 5111 5112 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5113 local->hw.queues >= IEEE80211_NUM_ACS; 5114 5115 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5116 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5117 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5118 if (err) { 5119 sdata_info(sdata, 5120 "failed to move station %pM to desired state\n", 5121 sta->sta.addr); 5122 WARN_ON(__sta_info_destroy(sta)); 5123 goto out_err; 5124 } 5125 5126 if (sdata->wdev.use_4addr) 5127 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5128 5129 mutex_unlock(&sdata->local->sta_mtx); 5130 5131 ieee80211_set_associated(sdata, assoc_data, changed); 5132 5133 /* 5134 * If we're using 4-addr mode, let the AP know that we're 5135 * doing so, so that it can create the STA VLAN on its side 5136 */ 5137 if (ifmgd->use_4addr) 5138 ieee80211_send_4addr_nullfunc(local, sdata); 5139 5140 /* 5141 * Start timer to probe the connection to the AP now. 5142 * Also start the timer that will detect beacon loss. 5143 */ 5144 ieee80211_sta_reset_beacon_monitor(sdata); 5145 ieee80211_sta_reset_conn_monitor(sdata); 5146 5147 return true; 5148 out_err: 5149 eth_zero_addr(sdata->vif.cfg.ap_addr); 5150 mutex_unlock(&sdata->local->sta_mtx); 5151 return false; 5152 } 5153 5154 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5155 struct ieee80211_mgmt *mgmt, 5156 size_t len) 5157 { 5158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5159 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5160 u16 capab_info, status_code, aid; 5161 struct ieee80211_elems_parse_params parse_params = { 5162 .bss = NULL, 5163 .link_id = -1, 5164 .from_ap = true, 5165 }; 5166 struct ieee802_11_elems *elems; 5167 int ac; 5168 const u8 *elem_start; 5169 unsigned int elem_len; 5170 bool reassoc; 5171 struct ieee80211_event event = { 5172 .type = MLME_EVENT, 5173 .u.mlme.data = ASSOC_EVENT, 5174 }; 5175 struct ieee80211_prep_tx_info info = {}; 5176 struct cfg80211_rx_assoc_resp resp = { 5177 .uapsd_queues = -1, 5178 }; 5179 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5180 unsigned int link_id; 5181 5182 sdata_assert_lock(sdata); 5183 5184 if (!assoc_data) 5185 return; 5186 5187 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5188 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5189 return; 5190 5191 /* 5192 * AssocResp and ReassocResp have identical structure, so process both 5193 * of them in this function. 5194 */ 5195 5196 if (len < 24 + 6) 5197 return; 5198 5199 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5200 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5201 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5202 if (assoc_data->s1g) 5203 elem_start = mgmt->u.s1g_assoc_resp.variable; 5204 else 5205 elem_start = mgmt->u.assoc_resp.variable; 5206 5207 /* 5208 * Note: this may not be perfect, AP might misbehave - if 5209 * anyone needs to rely on perfect complete notification 5210 * with the exact right subtype, then we need to track what 5211 * we actually transmitted. 5212 */ 5213 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5214 IEEE80211_STYPE_ASSOC_REQ; 5215 5216 if (assoc_data->fils_kek_len && 5217 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5218 return; 5219 5220 elem_len = len - (elem_start - (u8 *)mgmt); 5221 parse_params.start = elem_start; 5222 parse_params.len = elem_len; 5223 elems = ieee802_11_parse_elems_full(&parse_params); 5224 if (!elems) 5225 goto notify_driver; 5226 5227 if (elems->aid_resp) 5228 aid = le16_to_cpu(elems->aid_resp->aid); 5229 else if (assoc_data->s1g) 5230 aid = 0; /* TODO */ 5231 else 5232 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5233 5234 /* 5235 * The 5 MSB of the AID field are reserved 5236 * (802.11-2016 9.4.1.8 AID field) 5237 */ 5238 aid &= 0x7ff; 5239 5240 sdata_info(sdata, 5241 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5242 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5243 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5244 5245 ifmgd->broken_ap = false; 5246 5247 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5248 elems->timeout_int && 5249 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5250 u32 tu, ms; 5251 5252 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5253 le32_to_cpu(elems->timeout_int->value)); 5254 5255 tu = le32_to_cpu(elems->timeout_int->value); 5256 ms = tu * 1024 / 1000; 5257 sdata_info(sdata, 5258 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5259 assoc_data->ap_addr, tu, ms); 5260 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5261 assoc_data->timeout_started = true; 5262 if (ms > IEEE80211_ASSOC_TIMEOUT) 5263 run_again(sdata, assoc_data->timeout); 5264 goto notify_driver; 5265 } 5266 5267 if (status_code != WLAN_STATUS_SUCCESS) { 5268 sdata_info(sdata, "%pM denied association (code=%d)\n", 5269 assoc_data->ap_addr, status_code); 5270 event.u.mlme.status = MLME_DENIED; 5271 event.u.mlme.reason = status_code; 5272 drv_event_callback(sdata->local, sdata, &event); 5273 } else { 5274 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5275 sdata_info(sdata, 5276 "invalid AID value %d (out of range), turn off PS\n", 5277 aid); 5278 aid = 0; 5279 ifmgd->broken_ap = true; 5280 } 5281 5282 if (sdata->vif.valid_links) { 5283 if (!elems->multi_link) { 5284 sdata_info(sdata, 5285 "MLO association with %pM but no multi-link element in response!\n", 5286 assoc_data->ap_addr); 5287 goto abandon_assoc; 5288 } 5289 5290 if (le16_get_bits(elems->multi_link->control, 5291 IEEE80211_ML_CONTROL_TYPE) != 5292 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5293 sdata_info(sdata, 5294 "bad multi-link element (control=0x%x)\n", 5295 le16_to_cpu(elems->multi_link->control)); 5296 goto abandon_assoc; 5297 } else { 5298 struct ieee80211_mle_basic_common_info *common; 5299 5300 common = (void *)elems->multi_link->variable; 5301 5302 if (memcmp(assoc_data->ap_addr, 5303 common->mld_mac_addr, ETH_ALEN)) { 5304 sdata_info(sdata, 5305 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5306 common->mld_mac_addr, 5307 assoc_data->ap_addr); 5308 goto abandon_assoc; 5309 } 5310 } 5311 } 5312 5313 sdata->vif.cfg.aid = aid; 5314 5315 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5316 elem_start, elem_len)) { 5317 /* oops -- internal error -- send timeout for now */ 5318 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5319 goto notify_driver; 5320 } 5321 event.u.mlme.status = MLME_SUCCESS; 5322 drv_event_callback(sdata->local, sdata, &event); 5323 sdata_info(sdata, "associated\n"); 5324 5325 info.success = 1; 5326 } 5327 5328 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5329 struct ieee80211_link_data *link; 5330 5331 link = sdata_dereference(sdata->link[link_id], sdata); 5332 if (!link) 5333 continue; 5334 5335 if (!assoc_data->link[link_id].bss) 5336 continue; 5337 5338 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5339 resp.links[link_id].addr = link->conf->addr; 5340 resp.links[link_id].status = assoc_data->link[link_id].status; 5341 5342 /* get uapsd queues configuration - same for all links */ 5343 resp.uapsd_queues = 0; 5344 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5345 if (link->tx_conf[ac].uapsd) 5346 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5347 } 5348 5349 if (sdata->vif.valid_links) { 5350 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5351 resp.ap_mld_addr = ap_mld_addr; 5352 } 5353 5354 ieee80211_destroy_assoc_data(sdata, 5355 status_code == WLAN_STATUS_SUCCESS ? 5356 ASSOC_SUCCESS : 5357 ASSOC_REJECTED); 5358 5359 resp.buf = (u8 *)mgmt; 5360 resp.len = len; 5361 resp.req_ies = ifmgd->assoc_req_ies; 5362 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5363 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5364 notify_driver: 5365 drv_mgd_complete_tx(sdata->local, sdata, &info); 5366 kfree(elems); 5367 return; 5368 abandon_assoc: 5369 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5370 goto notify_driver; 5371 } 5372 5373 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5374 struct ieee80211_mgmt *mgmt, size_t len, 5375 struct ieee80211_rx_status *rx_status) 5376 { 5377 struct ieee80211_sub_if_data *sdata = link->sdata; 5378 struct ieee80211_local *local = sdata->local; 5379 struct ieee80211_bss *bss; 5380 struct ieee80211_channel *channel; 5381 5382 sdata_assert_lock(sdata); 5383 5384 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5385 ieee80211_rx_status_to_khz(rx_status)); 5386 if (!channel) 5387 return; 5388 5389 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5390 if (bss) { 5391 link->conf->beacon_rate = bss->beacon_rate; 5392 ieee80211_rx_bss_put(local, bss); 5393 } 5394 } 5395 5396 5397 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5398 struct sk_buff *skb) 5399 { 5400 struct ieee80211_sub_if_data *sdata = link->sdata; 5401 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5402 struct ieee80211_if_managed *ifmgd; 5403 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5404 struct ieee80211_channel *channel; 5405 size_t baselen, len = skb->len; 5406 5407 ifmgd = &sdata->u.mgd; 5408 5409 sdata_assert_lock(sdata); 5410 5411 /* 5412 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5413 * "If a 6 GHz AP receives a Probe Request frame and responds with 5414 * a Probe Response frame [..], the Address 1 field of the Probe 5415 * Response frame shall be set to the broadcast address [..]" 5416 * So, on 6GHz band we should also accept broadcast responses. 5417 */ 5418 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5419 rx_status->freq); 5420 if (!channel) 5421 return; 5422 5423 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5424 (channel->band != NL80211_BAND_6GHZ || 5425 !is_broadcast_ether_addr(mgmt->da))) 5426 return; /* ignore ProbeResp to foreign address */ 5427 5428 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5429 if (baselen > len) 5430 return; 5431 5432 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5433 5434 if (ifmgd->associated && 5435 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5436 ieee80211_reset_ap_probe(sdata); 5437 } 5438 5439 /* 5440 * This is the canonical list of information elements we care about, 5441 * the filter code also gives us all changes to the Microsoft OUI 5442 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5443 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5444 * changes to requested client power. 5445 * 5446 * We implement beacon filtering in software since that means we can 5447 * avoid processing the frame here and in cfg80211, and userspace 5448 * will not be able to tell whether the hardware supports it or not. 5449 * 5450 * XXX: This list needs to be dynamic -- userspace needs to be able to 5451 * add items it requires. It also needs to be able to tell us to 5452 * look out for other vendor IEs. 5453 */ 5454 static const u64 care_about_ies = 5455 (1ULL << WLAN_EID_COUNTRY) | 5456 (1ULL << WLAN_EID_ERP_INFO) | 5457 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5458 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5459 (1ULL << WLAN_EID_HT_CAPABILITY) | 5460 (1ULL << WLAN_EID_HT_OPERATION) | 5461 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5462 5463 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5464 struct ieee80211_if_managed *ifmgd, 5465 struct ieee80211_bss_conf *bss_conf, 5466 struct ieee80211_local *local, 5467 struct ieee80211_rx_status *rx_status) 5468 { 5469 struct ieee80211_sub_if_data *sdata = link->sdata; 5470 5471 /* Track average RSSI from the Beacon frames of the current AP */ 5472 5473 if (!link->u.mgd.tracking_signal_avg) { 5474 link->u.mgd.tracking_signal_avg = true; 5475 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5476 link->u.mgd.last_cqm_event_signal = 0; 5477 link->u.mgd.count_beacon_signal = 1; 5478 link->u.mgd.last_ave_beacon_signal = 0; 5479 } else { 5480 link->u.mgd.count_beacon_signal++; 5481 } 5482 5483 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5484 -rx_status->signal); 5485 5486 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5487 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5488 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5489 int last_sig = link->u.mgd.last_ave_beacon_signal; 5490 struct ieee80211_event event = { 5491 .type = RSSI_EVENT, 5492 }; 5493 5494 /* 5495 * if signal crosses either of the boundaries, invoke callback 5496 * with appropriate parameters 5497 */ 5498 if (sig > ifmgd->rssi_max_thold && 5499 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5500 link->u.mgd.last_ave_beacon_signal = sig; 5501 event.u.rssi.data = RSSI_EVENT_HIGH; 5502 drv_event_callback(local, sdata, &event); 5503 } else if (sig < ifmgd->rssi_min_thold && 5504 (last_sig >= ifmgd->rssi_max_thold || 5505 last_sig == 0)) { 5506 link->u.mgd.last_ave_beacon_signal = sig; 5507 event.u.rssi.data = RSSI_EVENT_LOW; 5508 drv_event_callback(local, sdata, &event); 5509 } 5510 } 5511 5512 if (bss_conf->cqm_rssi_thold && 5513 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5514 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5515 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5516 int last_event = link->u.mgd.last_cqm_event_signal; 5517 int thold = bss_conf->cqm_rssi_thold; 5518 int hyst = bss_conf->cqm_rssi_hyst; 5519 5520 if (sig < thold && 5521 (last_event == 0 || sig < last_event - hyst)) { 5522 link->u.mgd.last_cqm_event_signal = sig; 5523 ieee80211_cqm_rssi_notify( 5524 &sdata->vif, 5525 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5526 sig, GFP_KERNEL); 5527 } else if (sig > thold && 5528 (last_event == 0 || sig > last_event + hyst)) { 5529 link->u.mgd.last_cqm_event_signal = sig; 5530 ieee80211_cqm_rssi_notify( 5531 &sdata->vif, 5532 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5533 sig, GFP_KERNEL); 5534 } 5535 } 5536 5537 if (bss_conf->cqm_rssi_low && 5538 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5539 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5540 int last_event = link->u.mgd.last_cqm_event_signal; 5541 int low = bss_conf->cqm_rssi_low; 5542 int high = bss_conf->cqm_rssi_high; 5543 5544 if (sig < low && 5545 (last_event == 0 || last_event >= low)) { 5546 link->u.mgd.last_cqm_event_signal = sig; 5547 ieee80211_cqm_rssi_notify( 5548 &sdata->vif, 5549 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5550 sig, GFP_KERNEL); 5551 } else if (sig > high && 5552 (last_event == 0 || last_event <= high)) { 5553 link->u.mgd.last_cqm_event_signal = sig; 5554 ieee80211_cqm_rssi_notify( 5555 &sdata->vif, 5556 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5557 sig, GFP_KERNEL); 5558 } 5559 } 5560 } 5561 5562 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5563 struct cfg80211_bss *bss) 5564 { 5565 if (ether_addr_equal(tx_bssid, bss->bssid)) 5566 return true; 5567 if (!bss->transmitted_bss) 5568 return false; 5569 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5570 } 5571 5572 static bool ieee80211_config_puncturing(struct ieee80211_link_data *link, 5573 const struct ieee80211_eht_operation *eht_oper, 5574 u64 *changed) 5575 { 5576 u16 bitmap = 0, extracted; 5577 5578 if ((eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 5579 (eht_oper->params & 5580 IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 5581 const struct ieee80211_eht_operation_info *info = 5582 (void *)eht_oper->optional; 5583 const u8 *disable_subchannel_bitmap = info->optional; 5584 5585 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 5586 } 5587 5588 extracted = ieee80211_extract_dis_subch_bmap(eht_oper, 5589 &link->conf->chandef, 5590 bitmap); 5591 5592 /* accept if there are no changes */ 5593 if (!(*changed & BSS_CHANGED_BANDWIDTH) && 5594 extracted == link->conf->eht_puncturing) 5595 return true; 5596 5597 if (!cfg80211_valid_disable_subchannel_bitmap(&bitmap, 5598 &link->conf->chandef)) { 5599 link_info(link, 5600 "Got an invalid disable subchannel bitmap from AP %pM: bitmap = 0x%x, bw = 0x%x. disconnect\n", 5601 link->u.mgd.bssid, 5602 bitmap, 5603 link->conf->chandef.width); 5604 return false; 5605 } 5606 5607 ieee80211_handle_puncturing_bitmap(link, eht_oper, bitmap, changed); 5608 return true; 5609 } 5610 5611 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5612 struct ieee80211_hdr *hdr, size_t len, 5613 struct ieee80211_rx_status *rx_status) 5614 { 5615 struct ieee80211_sub_if_data *sdata = link->sdata; 5616 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5617 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5618 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5619 struct ieee80211_mgmt *mgmt = (void *) hdr; 5620 size_t baselen; 5621 struct ieee802_11_elems *elems; 5622 struct ieee80211_local *local = sdata->local; 5623 struct ieee80211_chanctx_conf *chanctx_conf; 5624 struct ieee80211_supported_band *sband; 5625 struct ieee80211_channel *chan; 5626 struct link_sta_info *link_sta; 5627 struct sta_info *sta; 5628 u64 changed = 0; 5629 bool erp_valid; 5630 u8 erp_value = 0; 5631 u32 ncrc = 0; 5632 u8 *bssid, *variable = mgmt->u.beacon.variable; 5633 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5634 struct ieee80211_elems_parse_params parse_params = { 5635 .link_id = -1, 5636 .from_ap = true, 5637 }; 5638 5639 sdata_assert_lock(sdata); 5640 5641 /* Process beacon from the current BSS */ 5642 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5643 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5644 struct ieee80211_ext *ext = (void *) mgmt; 5645 5646 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5647 variable = ext->u.s1g_short_beacon.variable; 5648 else 5649 variable = ext->u.s1g_beacon.variable; 5650 } 5651 5652 baselen = (u8 *) variable - (u8 *) mgmt; 5653 if (baselen > len) 5654 return; 5655 5656 parse_params.start = variable; 5657 parse_params.len = len - baselen; 5658 5659 rcu_read_lock(); 5660 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5661 if (!chanctx_conf) { 5662 rcu_read_unlock(); 5663 return; 5664 } 5665 5666 if (ieee80211_rx_status_to_khz(rx_status) != 5667 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5668 rcu_read_unlock(); 5669 return; 5670 } 5671 chan = chanctx_conf->def.chan; 5672 rcu_read_unlock(); 5673 5674 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5675 !WARN_ON(sdata->vif.valid_links) && 5676 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5677 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5678 elems = ieee802_11_parse_elems_full(&parse_params); 5679 if (!elems) 5680 return; 5681 5682 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5683 5684 if (elems->dtim_period) 5685 link->u.mgd.dtim_period = elems->dtim_period; 5686 link->u.mgd.have_beacon = true; 5687 ifmgd->assoc_data->need_beacon = false; 5688 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5689 link->conf->sync_tsf = 5690 le64_to_cpu(mgmt->u.beacon.timestamp); 5691 link->conf->sync_device_ts = 5692 rx_status->device_timestamp; 5693 link->conf->sync_dtim_count = elems->dtim_count; 5694 } 5695 5696 if (elems->mbssid_config_ie) 5697 bss_conf->profile_periodicity = 5698 elems->mbssid_config_ie->profile_periodicity; 5699 else 5700 bss_conf->profile_periodicity = 0; 5701 5702 if (elems->ext_capab_len >= 11 && 5703 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5704 bss_conf->ema_ap = true; 5705 else 5706 bss_conf->ema_ap = false; 5707 5708 /* continue assoc process */ 5709 ifmgd->assoc_data->timeout = jiffies; 5710 ifmgd->assoc_data->timeout_started = true; 5711 run_again(sdata, ifmgd->assoc_data->timeout); 5712 kfree(elems); 5713 return; 5714 } 5715 5716 if (!ifmgd->associated || 5717 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5718 return; 5719 bssid = link->u.mgd.bssid; 5720 5721 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5722 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5723 local, rx_status); 5724 5725 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5726 mlme_dbg_ratelimited(sdata, 5727 "cancelling AP probe due to a received beacon\n"); 5728 ieee80211_reset_ap_probe(sdata); 5729 } 5730 5731 /* 5732 * Push the beacon loss detection into the future since 5733 * we are processing a beacon from the AP just now. 5734 */ 5735 ieee80211_sta_reset_beacon_monitor(sdata); 5736 5737 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5738 * element (which carries the beacon interval). Don't forget to add a 5739 * bit to care_about_ies[] above if mac80211 is interested in a 5740 * changing S1G element. 5741 */ 5742 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5743 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5744 parse_params.bss = link->u.mgd.bss; 5745 parse_params.filter = care_about_ies; 5746 parse_params.crc = ncrc; 5747 elems = ieee802_11_parse_elems_full(&parse_params); 5748 if (!elems) 5749 return; 5750 ncrc = elems->crc; 5751 5752 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5753 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5754 if (local->hw.conf.dynamic_ps_timeout > 0) { 5755 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5756 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5757 ieee80211_hw_config(local, 5758 IEEE80211_CONF_CHANGE_PS); 5759 } 5760 ieee80211_send_nullfunc(local, sdata, false); 5761 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5762 local->pspolling = true; 5763 5764 /* 5765 * Here is assumed that the driver will be 5766 * able to send ps-poll frame and receive a 5767 * response even though power save mode is 5768 * enabled, but some drivers might require 5769 * to disable power save here. This needs 5770 * to be investigated. 5771 */ 5772 ieee80211_send_pspoll(local, sdata); 5773 } 5774 } 5775 5776 if (sdata->vif.p2p || 5777 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5778 struct ieee80211_p2p_noa_attr noa = {}; 5779 int ret; 5780 5781 ret = cfg80211_get_p2p_attr(variable, 5782 len - baselen, 5783 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5784 (u8 *) &noa, sizeof(noa)); 5785 if (ret >= 2) { 5786 if (link->u.mgd.p2p_noa_index != noa.index) { 5787 /* valid noa_attr and index changed */ 5788 link->u.mgd.p2p_noa_index = noa.index; 5789 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5790 changed |= BSS_CHANGED_P2P_PS; 5791 /* 5792 * make sure we update all information, the CRC 5793 * mechanism doesn't look at P2P attributes. 5794 */ 5795 link->u.mgd.beacon_crc_valid = false; 5796 } 5797 } else if (link->u.mgd.p2p_noa_index != -1) { 5798 /* noa_attr not found and we had valid noa_attr before */ 5799 link->u.mgd.p2p_noa_index = -1; 5800 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5801 changed |= BSS_CHANGED_P2P_PS; 5802 link->u.mgd.beacon_crc_valid = false; 5803 } 5804 } 5805 5806 if (link->u.mgd.csa_waiting_bcn) 5807 ieee80211_chswitch_post_beacon(link); 5808 5809 /* 5810 * Update beacon timing and dtim count on every beacon appearance. This 5811 * will allow the driver to use the most updated values. Do it before 5812 * comparing this one with last received beacon. 5813 * IMPORTANT: These parameters would possibly be out of sync by the time 5814 * the driver will use them. The synchronized view is currently 5815 * guaranteed only in certain callbacks. 5816 */ 5817 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5818 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5819 link->conf->sync_tsf = 5820 le64_to_cpu(mgmt->u.beacon.timestamp); 5821 link->conf->sync_device_ts = 5822 rx_status->device_timestamp; 5823 link->conf->sync_dtim_count = elems->dtim_count; 5824 } 5825 5826 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5827 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5828 goto free; 5829 link->u.mgd.beacon_crc = ncrc; 5830 link->u.mgd.beacon_crc_valid = true; 5831 5832 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5833 5834 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5835 rx_status->device_timestamp, 5836 elems, true); 5837 5838 if (!link->u.mgd.disable_wmm_tracking && 5839 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5840 elems->wmm_param_len, 5841 elems->mu_edca_param_set)) 5842 changed |= BSS_CHANGED_QOS; 5843 5844 /* 5845 * If we haven't had a beacon before, tell the driver about the 5846 * DTIM period (and beacon timing if desired) now. 5847 */ 5848 if (!link->u.mgd.have_beacon) { 5849 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5850 bss_conf->dtim_period = elems->dtim_period ?: 1; 5851 5852 changed |= BSS_CHANGED_BEACON_INFO; 5853 link->u.mgd.have_beacon = true; 5854 5855 mutex_lock(&local->iflist_mtx); 5856 ieee80211_recalc_ps(local); 5857 mutex_unlock(&local->iflist_mtx); 5858 5859 ieee80211_recalc_ps_vif(sdata); 5860 } 5861 5862 if (elems->erp_info) { 5863 erp_valid = true; 5864 erp_value = elems->erp_info[0]; 5865 } else { 5866 erp_valid = false; 5867 } 5868 5869 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5870 changed |= ieee80211_handle_bss_capability(link, 5871 le16_to_cpu(mgmt->u.beacon.capab_info), 5872 erp_valid, erp_value); 5873 5874 mutex_lock(&local->sta_mtx); 5875 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5876 if (WARN_ON(!sta)) { 5877 mutex_unlock(&local->sta_mtx); 5878 goto free; 5879 } 5880 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5881 lockdep_is_held(&local->sta_mtx)); 5882 if (WARN_ON(!link_sta)) { 5883 mutex_unlock(&local->sta_mtx); 5884 goto free; 5885 } 5886 5887 if (WARN_ON(!link->conf->chandef.chan)) 5888 goto free; 5889 5890 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5891 5892 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5893 5894 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5895 elems->vht_cap_elem, elems->ht_operation, 5896 elems->vht_operation, elems->he_operation, 5897 elems->eht_operation, 5898 elems->s1g_oper, bssid, &changed)) { 5899 mutex_unlock(&local->sta_mtx); 5900 sdata_info(sdata, 5901 "failed to follow AP %pM bandwidth change, disconnect\n", 5902 bssid); 5903 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5904 WLAN_REASON_DEAUTH_LEAVING, 5905 true, deauth_buf); 5906 ieee80211_report_disconnect(sdata, deauth_buf, 5907 sizeof(deauth_buf), true, 5908 WLAN_REASON_DEAUTH_LEAVING, 5909 false); 5910 goto free; 5911 } 5912 5913 if (elems->opmode_notif) 5914 ieee80211_vht_handle_opmode(sdata, link_sta, 5915 *elems->opmode_notif, 5916 rx_status->band); 5917 mutex_unlock(&local->sta_mtx); 5918 5919 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5920 elems->country_elem, 5921 elems->country_elem_len, 5922 elems->pwr_constr_elem, 5923 elems->cisco_dtpc_elem); 5924 5925 if (elems->eht_operation && 5926 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 5927 if (!ieee80211_config_puncturing(link, elems->eht_operation, 5928 &changed)) { 5929 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5930 WLAN_REASON_DEAUTH_LEAVING, 5931 true, deauth_buf); 5932 ieee80211_report_disconnect(sdata, deauth_buf, 5933 sizeof(deauth_buf), true, 5934 WLAN_REASON_DEAUTH_LEAVING, 5935 false); 5936 goto free; 5937 } 5938 } 5939 5940 ieee80211_link_info_change_notify(sdata, link, changed); 5941 free: 5942 kfree(elems); 5943 } 5944 5945 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5946 struct sk_buff *skb) 5947 { 5948 struct ieee80211_link_data *link = &sdata->deflink; 5949 struct ieee80211_rx_status *rx_status; 5950 struct ieee80211_hdr *hdr; 5951 u16 fc; 5952 5953 rx_status = (struct ieee80211_rx_status *) skb->cb; 5954 hdr = (struct ieee80211_hdr *) skb->data; 5955 fc = le16_to_cpu(hdr->frame_control); 5956 5957 sdata_lock(sdata); 5958 switch (fc & IEEE80211_FCTL_STYPE) { 5959 case IEEE80211_STYPE_S1G_BEACON: 5960 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5961 break; 5962 } 5963 sdata_unlock(sdata); 5964 } 5965 5966 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5967 struct sk_buff *skb) 5968 { 5969 struct ieee80211_link_data *link = &sdata->deflink; 5970 struct ieee80211_rx_status *rx_status; 5971 struct ieee80211_mgmt *mgmt; 5972 u16 fc; 5973 int ies_len; 5974 5975 rx_status = (struct ieee80211_rx_status *) skb->cb; 5976 mgmt = (struct ieee80211_mgmt *) skb->data; 5977 fc = le16_to_cpu(mgmt->frame_control); 5978 5979 sdata_lock(sdata); 5980 5981 if (rx_status->link_valid) { 5982 link = sdata_dereference(sdata->link[rx_status->link_id], 5983 sdata); 5984 if (!link) 5985 goto out; 5986 } 5987 5988 switch (fc & IEEE80211_FCTL_STYPE) { 5989 case IEEE80211_STYPE_BEACON: 5990 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5991 skb->len, rx_status); 5992 break; 5993 case IEEE80211_STYPE_PROBE_RESP: 5994 ieee80211_rx_mgmt_probe_resp(link, skb); 5995 break; 5996 case IEEE80211_STYPE_AUTH: 5997 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5998 break; 5999 case IEEE80211_STYPE_DEAUTH: 6000 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6001 break; 6002 case IEEE80211_STYPE_DISASSOC: 6003 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6004 break; 6005 case IEEE80211_STYPE_ASSOC_RESP: 6006 case IEEE80211_STYPE_REASSOC_RESP: 6007 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6008 break; 6009 case IEEE80211_STYPE_ACTION: 6010 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6011 struct ieee802_11_elems *elems; 6012 6013 ies_len = skb->len - 6014 offsetof(struct ieee80211_mgmt, 6015 u.action.u.chan_switch.variable); 6016 6017 if (ies_len < 0) 6018 break; 6019 6020 /* CSA IE cannot be overridden, no need for BSSID */ 6021 elems = ieee802_11_parse_elems( 6022 mgmt->u.action.u.chan_switch.variable, 6023 ies_len, true, NULL); 6024 6025 if (elems && !elems->parse_error) 6026 ieee80211_sta_process_chanswitch(link, 6027 rx_status->mactime, 6028 rx_status->device_timestamp, 6029 elems, false); 6030 kfree(elems); 6031 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6032 struct ieee802_11_elems *elems; 6033 6034 ies_len = skb->len - 6035 offsetof(struct ieee80211_mgmt, 6036 u.action.u.ext_chan_switch.variable); 6037 6038 if (ies_len < 0) 6039 break; 6040 6041 /* 6042 * extended CSA IE can't be overridden, no need for 6043 * BSSID 6044 */ 6045 elems = ieee802_11_parse_elems( 6046 mgmt->u.action.u.ext_chan_switch.variable, 6047 ies_len, true, NULL); 6048 6049 if (elems && !elems->parse_error) { 6050 /* for the handling code pretend it was an IE */ 6051 elems->ext_chansw_ie = 6052 &mgmt->u.action.u.ext_chan_switch.data; 6053 6054 ieee80211_sta_process_chanswitch(link, 6055 rx_status->mactime, 6056 rx_status->device_timestamp, 6057 elems, false); 6058 } 6059 6060 kfree(elems); 6061 } 6062 break; 6063 } 6064 out: 6065 sdata_unlock(sdata); 6066 } 6067 6068 static void ieee80211_sta_timer(struct timer_list *t) 6069 { 6070 struct ieee80211_sub_if_data *sdata = 6071 from_timer(sdata, t, u.mgd.timer); 6072 6073 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6074 } 6075 6076 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6077 u8 reason, bool tx) 6078 { 6079 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6080 6081 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6082 tx, frame_buf); 6083 6084 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6085 reason, false); 6086 } 6087 6088 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6089 { 6090 struct ieee80211_local *local = sdata->local; 6091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6092 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6093 u32 tx_flags = 0; 6094 u16 trans = 1; 6095 u16 status = 0; 6096 struct ieee80211_prep_tx_info info = { 6097 .subtype = IEEE80211_STYPE_AUTH, 6098 }; 6099 6100 sdata_assert_lock(sdata); 6101 6102 if (WARN_ON_ONCE(!auth_data)) 6103 return -EINVAL; 6104 6105 auth_data->tries++; 6106 6107 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6108 sdata_info(sdata, "authentication with %pM timed out\n", 6109 auth_data->ap_addr); 6110 6111 /* 6112 * Most likely AP is not in the range so remove the 6113 * bss struct for that AP. 6114 */ 6115 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6116 6117 return -ETIMEDOUT; 6118 } 6119 6120 if (auth_data->algorithm == WLAN_AUTH_SAE) 6121 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6122 6123 drv_mgd_prepare_tx(local, sdata, &info); 6124 6125 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6126 auth_data->ap_addr, auth_data->tries, 6127 IEEE80211_AUTH_MAX_TRIES); 6128 6129 auth_data->expected_transaction = 2; 6130 6131 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6132 trans = auth_data->sae_trans; 6133 status = auth_data->sae_status; 6134 auth_data->expected_transaction = trans; 6135 } 6136 6137 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6138 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6139 IEEE80211_TX_INTFL_MLME_CONN_TX; 6140 6141 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6142 auth_data->data, auth_data->data_len, 6143 auth_data->ap_addr, auth_data->ap_addr, 6144 NULL, 0, 0, tx_flags); 6145 6146 if (tx_flags == 0) { 6147 if (auth_data->algorithm == WLAN_AUTH_SAE) 6148 auth_data->timeout = jiffies + 6149 IEEE80211_AUTH_TIMEOUT_SAE; 6150 else 6151 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6152 } else { 6153 auth_data->timeout = 6154 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6155 } 6156 6157 auth_data->timeout_started = true; 6158 run_again(sdata, auth_data->timeout); 6159 6160 return 0; 6161 } 6162 6163 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6164 { 6165 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6166 struct ieee80211_local *local = sdata->local; 6167 int ret; 6168 6169 sdata_assert_lock(sdata); 6170 6171 assoc_data->tries++; 6172 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6173 sdata_info(sdata, "association with %pM timed out\n", 6174 assoc_data->ap_addr); 6175 6176 /* 6177 * Most likely AP is not in the range so remove the 6178 * bss struct for that AP. 6179 */ 6180 cfg80211_unlink_bss(local->hw.wiphy, 6181 assoc_data->link[assoc_data->assoc_link_id].bss); 6182 6183 return -ETIMEDOUT; 6184 } 6185 6186 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6187 assoc_data->ap_addr, assoc_data->tries, 6188 IEEE80211_ASSOC_MAX_TRIES); 6189 ret = ieee80211_send_assoc(sdata); 6190 if (ret) 6191 return ret; 6192 6193 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6194 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6195 assoc_data->timeout_started = true; 6196 run_again(sdata, assoc_data->timeout); 6197 } else { 6198 assoc_data->timeout = 6199 round_jiffies_up(jiffies + 6200 IEEE80211_ASSOC_TIMEOUT_LONG); 6201 assoc_data->timeout_started = true; 6202 run_again(sdata, assoc_data->timeout); 6203 } 6204 6205 return 0; 6206 } 6207 6208 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6209 __le16 fc, bool acked) 6210 { 6211 struct ieee80211_local *local = sdata->local; 6212 6213 sdata->u.mgd.status_fc = fc; 6214 sdata->u.mgd.status_acked = acked; 6215 sdata->u.mgd.status_received = true; 6216 6217 wiphy_work_queue(local->hw.wiphy, &sdata->work); 6218 } 6219 6220 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6221 { 6222 struct ieee80211_local *local = sdata->local; 6223 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6224 6225 sdata_lock(sdata); 6226 6227 if (ifmgd->status_received) { 6228 __le16 fc = ifmgd->status_fc; 6229 bool status_acked = ifmgd->status_acked; 6230 6231 ifmgd->status_received = false; 6232 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6233 if (status_acked) { 6234 if (ifmgd->auth_data->algorithm == 6235 WLAN_AUTH_SAE) 6236 ifmgd->auth_data->timeout = 6237 jiffies + 6238 IEEE80211_AUTH_TIMEOUT_SAE; 6239 else 6240 ifmgd->auth_data->timeout = 6241 jiffies + 6242 IEEE80211_AUTH_TIMEOUT_SHORT; 6243 run_again(sdata, ifmgd->auth_data->timeout); 6244 } else { 6245 ifmgd->auth_data->timeout = jiffies - 1; 6246 } 6247 ifmgd->auth_data->timeout_started = true; 6248 } else if (ifmgd->assoc_data && 6249 (ieee80211_is_assoc_req(fc) || 6250 ieee80211_is_reassoc_req(fc))) { 6251 if (status_acked) { 6252 ifmgd->assoc_data->timeout = 6253 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6254 run_again(sdata, ifmgd->assoc_data->timeout); 6255 } else { 6256 ifmgd->assoc_data->timeout = jiffies - 1; 6257 } 6258 ifmgd->assoc_data->timeout_started = true; 6259 } 6260 } 6261 6262 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6263 time_after(jiffies, ifmgd->auth_data->timeout)) { 6264 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6265 /* 6266 * ok ... we waited for assoc or continuation but 6267 * userspace didn't do it, so kill the auth data 6268 */ 6269 ieee80211_destroy_auth_data(sdata, false); 6270 } else if (ieee80211_auth(sdata)) { 6271 u8 ap_addr[ETH_ALEN]; 6272 struct ieee80211_event event = { 6273 .type = MLME_EVENT, 6274 .u.mlme.data = AUTH_EVENT, 6275 .u.mlme.status = MLME_TIMEOUT, 6276 }; 6277 6278 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6279 6280 ieee80211_destroy_auth_data(sdata, false); 6281 6282 cfg80211_auth_timeout(sdata->dev, ap_addr); 6283 drv_event_callback(sdata->local, sdata, &event); 6284 } 6285 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6286 run_again(sdata, ifmgd->auth_data->timeout); 6287 6288 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6289 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6290 if ((ifmgd->assoc_data->need_beacon && 6291 !sdata->deflink.u.mgd.have_beacon) || 6292 ieee80211_do_assoc(sdata)) { 6293 struct ieee80211_event event = { 6294 .type = MLME_EVENT, 6295 .u.mlme.data = ASSOC_EVENT, 6296 .u.mlme.status = MLME_TIMEOUT, 6297 }; 6298 6299 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6300 drv_event_callback(sdata->local, sdata, &event); 6301 } 6302 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6303 run_again(sdata, ifmgd->assoc_data->timeout); 6304 6305 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6306 ifmgd->associated) { 6307 u8 *bssid = sdata->deflink.u.mgd.bssid; 6308 int max_tries; 6309 6310 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6311 max_tries = max_nullfunc_tries; 6312 else 6313 max_tries = max_probe_tries; 6314 6315 /* ACK received for nullfunc probing frame */ 6316 if (!ifmgd->probe_send_count) 6317 ieee80211_reset_ap_probe(sdata); 6318 else if (ifmgd->nullfunc_failed) { 6319 if (ifmgd->probe_send_count < max_tries) { 6320 mlme_dbg(sdata, 6321 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6322 bssid, ifmgd->probe_send_count, 6323 max_tries); 6324 ieee80211_mgd_probe_ap_send(sdata); 6325 } else { 6326 mlme_dbg(sdata, 6327 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6328 bssid); 6329 ieee80211_sta_connection_lost(sdata, 6330 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6331 false); 6332 } 6333 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6334 run_again(sdata, ifmgd->probe_timeout); 6335 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6336 mlme_dbg(sdata, 6337 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6338 bssid, probe_wait_ms); 6339 ieee80211_sta_connection_lost(sdata, 6340 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6341 } else if (ifmgd->probe_send_count < max_tries) { 6342 mlme_dbg(sdata, 6343 "No probe response from AP %pM after %dms, try %d/%i\n", 6344 bssid, probe_wait_ms, 6345 ifmgd->probe_send_count, max_tries); 6346 ieee80211_mgd_probe_ap_send(sdata); 6347 } else { 6348 /* 6349 * We actually lost the connection ... or did we? 6350 * Let's make sure! 6351 */ 6352 mlme_dbg(sdata, 6353 "No probe response from AP %pM after %dms, disconnecting.\n", 6354 bssid, probe_wait_ms); 6355 6356 ieee80211_sta_connection_lost(sdata, 6357 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6358 } 6359 } 6360 6361 sdata_unlock(sdata); 6362 } 6363 6364 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6365 { 6366 struct ieee80211_sub_if_data *sdata = 6367 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6368 6369 if (WARN_ON(sdata->vif.valid_links)) 6370 return; 6371 6372 if (sdata->vif.bss_conf.csa_active && 6373 !sdata->deflink.u.mgd.csa_waiting_bcn) 6374 return; 6375 6376 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6377 return; 6378 6379 sdata->u.mgd.connection_loss = false; 6380 wiphy_work_queue(sdata->local->hw.wiphy, 6381 &sdata->u.mgd.beacon_connection_loss_work); 6382 } 6383 6384 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6385 { 6386 struct ieee80211_sub_if_data *sdata = 6387 from_timer(sdata, t, u.mgd.conn_mon_timer); 6388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6389 struct ieee80211_local *local = sdata->local; 6390 struct sta_info *sta; 6391 unsigned long timeout; 6392 6393 if (WARN_ON(sdata->vif.valid_links)) 6394 return; 6395 6396 if (sdata->vif.bss_conf.csa_active && 6397 !sdata->deflink.u.mgd.csa_waiting_bcn) 6398 return; 6399 6400 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6401 if (!sta) 6402 return; 6403 6404 timeout = sta->deflink.status_stats.last_ack; 6405 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6406 timeout = sta->deflink.rx_stats.last_rx; 6407 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6408 6409 /* If timeout is after now, then update timer to fire at 6410 * the later date, but do not actually probe at this time. 6411 */ 6412 if (time_is_after_jiffies(timeout)) { 6413 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6414 return; 6415 } 6416 6417 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6418 } 6419 6420 static void ieee80211_sta_monitor_work(struct work_struct *work) 6421 { 6422 struct ieee80211_sub_if_data *sdata = 6423 container_of(work, struct ieee80211_sub_if_data, 6424 u.mgd.monitor_work); 6425 6426 ieee80211_mgd_probe_ap(sdata, false); 6427 } 6428 6429 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6430 { 6431 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6432 __ieee80211_stop_poll(sdata); 6433 6434 /* let's probe the connection once */ 6435 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6436 ieee80211_queue_work(&sdata->local->hw, 6437 &sdata->u.mgd.monitor_work); 6438 } 6439 } 6440 6441 #ifdef CONFIG_PM 6442 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6443 { 6444 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6445 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6446 6447 sdata_lock(sdata); 6448 6449 if (ifmgd->auth_data || ifmgd->assoc_data) { 6450 const u8 *ap_addr = ifmgd->auth_data ? 6451 ifmgd->auth_data->ap_addr : 6452 ifmgd->assoc_data->ap_addr; 6453 6454 /* 6455 * If we are trying to authenticate / associate while suspending, 6456 * cfg80211 won't know and won't actually abort those attempts, 6457 * thus we need to do that ourselves. 6458 */ 6459 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6460 IEEE80211_STYPE_DEAUTH, 6461 WLAN_REASON_DEAUTH_LEAVING, 6462 false, frame_buf); 6463 if (ifmgd->assoc_data) 6464 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6465 if (ifmgd->auth_data) 6466 ieee80211_destroy_auth_data(sdata, false); 6467 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6468 IEEE80211_DEAUTH_FRAME_LEN, 6469 false); 6470 } 6471 6472 /* This is a bit of a hack - we should find a better and more generic 6473 * solution to this. Normally when suspending, cfg80211 will in fact 6474 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6475 * auth (not so important) or assoc (this is the problem) process. 6476 * 6477 * As a consequence, it can happen that we are in the process of both 6478 * associating and suspending, and receive an association response 6479 * after cfg80211 has checked if it needs to disconnect, but before 6480 * we actually set the flag to drop incoming frames. This will then 6481 * cause the workqueue flush to process the association response in 6482 * the suspend, resulting in a successful association just before it 6483 * tries to remove the interface from the driver, which now though 6484 * has a channel context assigned ... this results in issues. 6485 * 6486 * To work around this (for now) simply deauth here again if we're 6487 * now connected. 6488 */ 6489 if (ifmgd->associated && !sdata->local->wowlan) { 6490 u8 bssid[ETH_ALEN]; 6491 struct cfg80211_deauth_request req = { 6492 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6493 .bssid = bssid, 6494 }; 6495 6496 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6497 ieee80211_mgd_deauth(sdata, &req); 6498 } 6499 6500 sdata_unlock(sdata); 6501 } 6502 #endif 6503 6504 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6505 { 6506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6507 6508 sdata_lock(sdata); 6509 if (!ifmgd->associated) { 6510 sdata_unlock(sdata); 6511 return; 6512 } 6513 6514 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6515 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6516 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6517 ieee80211_sta_connection_lost(sdata, 6518 WLAN_REASON_UNSPECIFIED, 6519 true); 6520 sdata_unlock(sdata); 6521 return; 6522 } 6523 6524 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6525 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6526 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6527 ieee80211_sta_connection_lost(sdata, 6528 WLAN_REASON_UNSPECIFIED, 6529 true); 6530 sdata_unlock(sdata); 6531 return; 6532 } 6533 6534 sdata_unlock(sdata); 6535 } 6536 6537 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 6538 struct wiphy_work *work) 6539 { 6540 struct ieee80211_link_data *link = 6541 container_of(work, struct ieee80211_link_data, 6542 u.mgd.request_smps_work); 6543 6544 sdata_lock(link->sdata); 6545 __ieee80211_request_smps_mgd(link->sdata, link, 6546 link->u.mgd.driver_smps_mode); 6547 sdata_unlock(link->sdata); 6548 } 6549 6550 /* interface setup */ 6551 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6552 { 6553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6554 6555 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6556 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 6557 ieee80211_beacon_connection_loss_work); 6558 wiphy_work_init(&ifmgd->csa_connection_drop_work, 6559 ieee80211_csa_connection_drop_work); 6560 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6561 ieee80211_tdls_peer_del_work); 6562 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6563 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6564 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6565 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6566 ieee80211_sta_handle_tspec_ac_params_wk); 6567 6568 ifmgd->flags = 0; 6569 ifmgd->powersave = sdata->wdev.ps; 6570 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6571 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6572 /* Setup TDLS data */ 6573 spin_lock_init(&ifmgd->teardown_lock); 6574 ifmgd->teardown_skb = NULL; 6575 ifmgd->orig_teardown_skb = NULL; 6576 } 6577 6578 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6579 { 6580 struct ieee80211_sub_if_data *sdata = link->sdata; 6581 struct ieee80211_local *local = sdata->local; 6582 unsigned int link_id = link->link_id; 6583 6584 link->u.mgd.p2p_noa_index = -1; 6585 link->u.mgd.conn_flags = 0; 6586 link->conf->bssid = link->u.mgd.bssid; 6587 6588 wiphy_work_init(&link->u.mgd.request_smps_work, 6589 ieee80211_request_smps_mgd_work); 6590 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6591 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6592 else 6593 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6594 6595 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 6596 ieee80211_chswitch_work); 6597 6598 if (sdata->u.mgd.assoc_data) 6599 ether_addr_copy(link->conf->addr, 6600 sdata->u.mgd.assoc_data->link[link_id].addr); 6601 else if (!is_valid_ether_addr(link->conf->addr)) 6602 eth_random_addr(link->conf->addr); 6603 } 6604 6605 /* scan finished notification */ 6606 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6607 { 6608 struct ieee80211_sub_if_data *sdata; 6609 6610 /* Restart STA timers */ 6611 rcu_read_lock(); 6612 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6613 if (ieee80211_sdata_running(sdata)) 6614 ieee80211_restart_sta_timer(sdata); 6615 } 6616 rcu_read_unlock(); 6617 } 6618 6619 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6620 struct cfg80211_bss *cbss, s8 link_id, 6621 const u8 *ap_mld_addr, bool assoc, 6622 bool override) 6623 { 6624 struct ieee80211_local *local = sdata->local; 6625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6626 struct ieee80211_bss *bss = (void *)cbss->priv; 6627 struct sta_info *new_sta = NULL; 6628 struct ieee80211_link_data *link; 6629 bool have_sta = false; 6630 bool mlo; 6631 int err; 6632 6633 if (link_id >= 0) { 6634 mlo = true; 6635 if (WARN_ON(!ap_mld_addr)) 6636 return -EINVAL; 6637 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6638 } else { 6639 if (WARN_ON(ap_mld_addr)) 6640 return -EINVAL; 6641 ap_mld_addr = cbss->bssid; 6642 err = ieee80211_vif_set_links(sdata, 0); 6643 link_id = 0; 6644 mlo = false; 6645 } 6646 6647 if (err) 6648 return err; 6649 6650 link = sdata_dereference(sdata->link[link_id], sdata); 6651 if (WARN_ON(!link)) { 6652 err = -ENOLINK; 6653 goto out_err; 6654 } 6655 6656 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6657 err = -EINVAL; 6658 goto out_err; 6659 } 6660 6661 /* If a reconfig is happening, bail out */ 6662 if (local->in_reconfig) { 6663 err = -EBUSY; 6664 goto out_err; 6665 } 6666 6667 if (assoc) { 6668 rcu_read_lock(); 6669 have_sta = sta_info_get(sdata, ap_mld_addr); 6670 rcu_read_unlock(); 6671 } 6672 6673 if (!have_sta) { 6674 if (mlo) 6675 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6676 link_id, cbss->bssid, 6677 GFP_KERNEL); 6678 else 6679 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6680 6681 if (!new_sta) { 6682 err = -ENOMEM; 6683 goto out_err; 6684 } 6685 6686 new_sta->sta.mlo = mlo; 6687 } 6688 6689 /* 6690 * Set up the information for the new channel before setting the 6691 * new channel. We can't - completely race-free - change the basic 6692 * rates bitmap and the channel (sband) that it refers to, but if 6693 * we set it up before we at least avoid calling into the driver's 6694 * bss_info_changed() method with invalid information (since we do 6695 * call that from changing the channel - only for IDLE and perhaps 6696 * some others, but ...). 6697 * 6698 * So to avoid that, just set up all the new information before the 6699 * channel, but tell the driver to apply it only afterwards, since 6700 * it might need the new channel for that. 6701 */ 6702 if (new_sta) { 6703 const struct cfg80211_bss_ies *ies; 6704 struct link_sta_info *link_sta; 6705 6706 rcu_read_lock(); 6707 link_sta = rcu_dereference(new_sta->link[link_id]); 6708 if (WARN_ON(!link_sta)) { 6709 rcu_read_unlock(); 6710 sta_info_free(local, new_sta); 6711 err = -EINVAL; 6712 goto out_err; 6713 } 6714 6715 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6716 link_sta, cbss); 6717 if (err) { 6718 rcu_read_unlock(); 6719 sta_info_free(local, new_sta); 6720 goto out_err; 6721 } 6722 6723 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6724 6725 /* set timing information */ 6726 link->conf->beacon_int = cbss->beacon_interval; 6727 ies = rcu_dereference(cbss->beacon_ies); 6728 if (ies) { 6729 link->conf->sync_tsf = ies->tsf; 6730 link->conf->sync_device_ts = 6731 bss->device_ts_beacon; 6732 6733 ieee80211_get_dtim(ies, 6734 &link->conf->sync_dtim_count, 6735 NULL); 6736 } else if (!ieee80211_hw_check(&sdata->local->hw, 6737 TIMING_BEACON_ONLY)) { 6738 ies = rcu_dereference(cbss->proberesp_ies); 6739 /* must be non-NULL since beacon IEs were NULL */ 6740 link->conf->sync_tsf = ies->tsf; 6741 link->conf->sync_device_ts = 6742 bss->device_ts_presp; 6743 link->conf->sync_dtim_count = 0; 6744 } else { 6745 link->conf->sync_tsf = 0; 6746 link->conf->sync_device_ts = 0; 6747 link->conf->sync_dtim_count = 0; 6748 } 6749 rcu_read_unlock(); 6750 } 6751 6752 if (new_sta || override) { 6753 err = ieee80211_prep_channel(sdata, link, cbss, 6754 &link->u.mgd.conn_flags); 6755 if (err) { 6756 if (new_sta) 6757 sta_info_free(local, new_sta); 6758 goto out_err; 6759 } 6760 } 6761 6762 if (new_sta) { 6763 /* 6764 * tell driver about BSSID, basic rates and timing 6765 * this was set up above, before setting the channel 6766 */ 6767 ieee80211_link_info_change_notify(sdata, link, 6768 BSS_CHANGED_BSSID | 6769 BSS_CHANGED_BASIC_RATES | 6770 BSS_CHANGED_BEACON_INT); 6771 6772 if (assoc) 6773 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6774 6775 err = sta_info_insert(new_sta); 6776 new_sta = NULL; 6777 if (err) { 6778 sdata_info(sdata, 6779 "failed to insert STA entry for the AP (error %d)\n", 6780 err); 6781 goto out_err; 6782 } 6783 } else 6784 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6785 6786 /* Cancel scan to ensure that nothing interferes with connection */ 6787 if (local->scanning) 6788 ieee80211_scan_cancel(local); 6789 6790 return 0; 6791 6792 out_err: 6793 ieee80211_link_release_channel(&sdata->deflink); 6794 ieee80211_vif_set_links(sdata, 0); 6795 return err; 6796 } 6797 6798 /* config hooks */ 6799 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6800 struct cfg80211_auth_request *req) 6801 { 6802 struct ieee80211_local *local = sdata->local; 6803 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6804 struct ieee80211_mgd_auth_data *auth_data; 6805 u16 auth_alg; 6806 int err; 6807 bool cont_auth; 6808 6809 /* prepare auth data structure */ 6810 6811 switch (req->auth_type) { 6812 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6813 auth_alg = WLAN_AUTH_OPEN; 6814 break; 6815 case NL80211_AUTHTYPE_SHARED_KEY: 6816 if (fips_enabled) 6817 return -EOPNOTSUPP; 6818 auth_alg = WLAN_AUTH_SHARED_KEY; 6819 break; 6820 case NL80211_AUTHTYPE_FT: 6821 auth_alg = WLAN_AUTH_FT; 6822 break; 6823 case NL80211_AUTHTYPE_NETWORK_EAP: 6824 auth_alg = WLAN_AUTH_LEAP; 6825 break; 6826 case NL80211_AUTHTYPE_SAE: 6827 auth_alg = WLAN_AUTH_SAE; 6828 break; 6829 case NL80211_AUTHTYPE_FILS_SK: 6830 auth_alg = WLAN_AUTH_FILS_SK; 6831 break; 6832 case NL80211_AUTHTYPE_FILS_SK_PFS: 6833 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6834 break; 6835 case NL80211_AUTHTYPE_FILS_PK: 6836 auth_alg = WLAN_AUTH_FILS_PK; 6837 break; 6838 default: 6839 return -EOPNOTSUPP; 6840 } 6841 6842 if (ifmgd->assoc_data) 6843 return -EBUSY; 6844 6845 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6846 req->ie_len, GFP_KERNEL); 6847 if (!auth_data) 6848 return -ENOMEM; 6849 6850 memcpy(auth_data->ap_addr, 6851 req->ap_mld_addr ?: req->bss->bssid, 6852 ETH_ALEN); 6853 auth_data->bss = req->bss; 6854 auth_data->link_id = req->link_id; 6855 6856 if (req->auth_data_len >= 4) { 6857 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6858 __le16 *pos = (__le16 *) req->auth_data; 6859 6860 auth_data->sae_trans = le16_to_cpu(pos[0]); 6861 auth_data->sae_status = le16_to_cpu(pos[1]); 6862 } 6863 memcpy(auth_data->data, req->auth_data + 4, 6864 req->auth_data_len - 4); 6865 auth_data->data_len += req->auth_data_len - 4; 6866 } 6867 6868 /* Check if continuing authentication or trying to authenticate with the 6869 * same BSS that we were in the process of authenticating with and avoid 6870 * removal and re-addition of the STA entry in 6871 * ieee80211_prep_connection(). 6872 */ 6873 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6874 ifmgd->auth_data->link_id == req->link_id; 6875 6876 if (req->ie && req->ie_len) { 6877 memcpy(&auth_data->data[auth_data->data_len], 6878 req->ie, req->ie_len); 6879 auth_data->data_len += req->ie_len; 6880 } 6881 6882 if (req->key && req->key_len) { 6883 auth_data->key_len = req->key_len; 6884 auth_data->key_idx = req->key_idx; 6885 memcpy(auth_data->key, req->key, req->key_len); 6886 } 6887 6888 auth_data->algorithm = auth_alg; 6889 6890 /* try to authenticate/probe */ 6891 6892 if (ifmgd->auth_data) { 6893 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6894 auth_data->peer_confirmed = 6895 ifmgd->auth_data->peer_confirmed; 6896 } 6897 ieee80211_destroy_auth_data(sdata, cont_auth); 6898 } 6899 6900 /* prep auth_data so we don't go into idle on disassoc */ 6901 ifmgd->auth_data = auth_data; 6902 6903 /* If this is continuation of an ongoing SAE authentication exchange 6904 * (i.e., request to send SAE Confirm) and the peer has already 6905 * confirmed, mark authentication completed since we are about to send 6906 * out SAE Confirm. 6907 */ 6908 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6909 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6910 ieee80211_mark_sta_auth(sdata); 6911 6912 if (ifmgd->associated) { 6913 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6914 6915 sdata_info(sdata, 6916 "disconnect from AP %pM for new auth to %pM\n", 6917 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6918 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6919 WLAN_REASON_UNSPECIFIED, 6920 false, frame_buf); 6921 6922 ieee80211_report_disconnect(sdata, frame_buf, 6923 sizeof(frame_buf), true, 6924 WLAN_REASON_UNSPECIFIED, 6925 false); 6926 } 6927 6928 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6929 6930 /* needed for transmitting the auth frame(s) properly */ 6931 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6932 6933 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6934 req->ap_mld_addr, cont_auth, false); 6935 if (err) 6936 goto err_clear; 6937 6938 err = ieee80211_auth(sdata); 6939 if (err) { 6940 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6941 goto err_clear; 6942 } 6943 6944 /* hold our own reference */ 6945 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6946 return 0; 6947 6948 err_clear: 6949 if (!sdata->vif.valid_links) { 6950 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6951 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6952 BSS_CHANGED_BSSID); 6953 mutex_lock(&sdata->local->mtx); 6954 ieee80211_link_release_channel(&sdata->deflink); 6955 mutex_unlock(&sdata->local->mtx); 6956 } 6957 ifmgd->auth_data = NULL; 6958 kfree(auth_data); 6959 return err; 6960 } 6961 6962 static ieee80211_conn_flags_t 6963 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6964 struct ieee80211_mgd_assoc_data *assoc_data, 6965 struct cfg80211_assoc_request *req, 6966 ieee80211_conn_flags_t conn_flags, 6967 unsigned int link_id) 6968 { 6969 struct ieee80211_local *local = sdata->local; 6970 const struct cfg80211_bss_ies *beacon_ies; 6971 struct ieee80211_supported_band *sband; 6972 const struct element *ht_elem, *vht_elem; 6973 struct ieee80211_link_data *link; 6974 struct cfg80211_bss *cbss; 6975 struct ieee80211_bss *bss; 6976 bool is_5ghz, is_6ghz; 6977 6978 cbss = assoc_data->link[link_id].bss; 6979 if (WARN_ON(!cbss)) 6980 return 0; 6981 6982 bss = (void *)cbss->priv; 6983 6984 sband = local->hw.wiphy->bands[cbss->channel->band]; 6985 if (WARN_ON(!sband)) 6986 return 0; 6987 6988 link = sdata_dereference(sdata->link[link_id], sdata); 6989 if (WARN_ON(!link)) 6990 return 0; 6991 6992 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6993 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6994 6995 /* for MLO connections assume advertising all rates is OK */ 6996 if (!req->ap_mld_addr) { 6997 assoc_data->supp_rates = bss->supp_rates; 6998 assoc_data->supp_rates_len = bss->supp_rates_len; 6999 } 7000 7001 /* copy and link elems for the STA profile */ 7002 if (req->links[link_id].elems_len) { 7003 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7004 req->links[link_id].elems_len); 7005 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7006 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7007 assoc_data->ie_pos += req->links[link_id].elems_len; 7008 } 7009 7010 rcu_read_lock(); 7011 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 7012 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 7013 assoc_data->link[link_id].ap_ht_param = 7014 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 7015 else if (!is_6ghz) 7016 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7017 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 7018 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 7019 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 7020 sizeof(struct ieee80211_vht_cap)); 7021 } else if (is_5ghz) { 7022 link_info(link, 7023 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 7024 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 7025 IEEE80211_CONN_DISABLE_HE | 7026 IEEE80211_CONN_DISABLE_EHT; 7027 } 7028 rcu_read_unlock(); 7029 7030 link->u.mgd.beacon_crc_valid = false; 7031 link->u.mgd.dtim_period = 0; 7032 link->u.mgd.have_beacon = false; 7033 7034 /* override HT/VHT configuration only if the AP and we support it */ 7035 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 7036 struct ieee80211_sta_ht_cap sta_ht_cap; 7037 7038 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7039 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7040 } 7041 7042 link->conf->eht_puncturing = 0; 7043 7044 rcu_read_lock(); 7045 beacon_ies = rcu_dereference(cbss->beacon_ies); 7046 if (beacon_ies) { 7047 const struct ieee80211_eht_operation *eht_oper; 7048 const struct element *elem; 7049 u8 dtim_count = 0; 7050 7051 ieee80211_get_dtim(beacon_ies, &dtim_count, 7052 &link->u.mgd.dtim_period); 7053 7054 sdata->deflink.u.mgd.have_beacon = true; 7055 7056 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7057 link->conf->sync_tsf = beacon_ies->tsf; 7058 link->conf->sync_device_ts = bss->device_ts_beacon; 7059 link->conf->sync_dtim_count = dtim_count; 7060 } 7061 7062 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 7063 beacon_ies->data, beacon_ies->len); 7064 if (elem && elem->datalen >= 3) 7065 link->conf->profile_periodicity = elem->data[2]; 7066 else 7067 link->conf->profile_periodicity = 0; 7068 7069 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 7070 beacon_ies->data, beacon_ies->len); 7071 if (elem && elem->datalen >= 11 && 7072 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7073 link->conf->ema_ap = true; 7074 else 7075 link->conf->ema_ap = false; 7076 7077 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, 7078 beacon_ies->data, beacon_ies->len); 7079 eht_oper = (const void *)(elem->data + 1); 7080 7081 if (elem && 7082 ieee80211_eht_oper_size_ok((const void *)(elem->data + 1), 7083 elem->datalen - 1) && 7084 (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) && 7085 (eht_oper->params & IEEE80211_EHT_OPER_DISABLED_SUBCHANNEL_BITMAP_PRESENT)) { 7086 const struct ieee80211_eht_operation_info *info = 7087 (void *)eht_oper->optional; 7088 const u8 *disable_subchannel_bitmap = info->optional; 7089 u16 bitmap; 7090 7091 bitmap = get_unaligned_le16(disable_subchannel_bitmap); 7092 if (cfg80211_valid_disable_subchannel_bitmap(&bitmap, 7093 &link->conf->chandef)) 7094 ieee80211_handle_puncturing_bitmap(link, 7095 eht_oper, 7096 bitmap, 7097 NULL); 7098 else 7099 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7100 } 7101 } 7102 rcu_read_unlock(); 7103 7104 if (bss->corrupt_data) { 7105 char *corrupt_type = "data"; 7106 7107 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 7108 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 7109 corrupt_type = "beacon and probe response"; 7110 else 7111 corrupt_type = "beacon"; 7112 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 7113 corrupt_type = "probe response"; 7114 } 7115 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 7116 cbss->bssid, corrupt_type); 7117 } 7118 7119 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 7120 if (sdata->u.mgd.powersave) 7121 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 7122 else 7123 link->smps_mode = IEEE80211_SMPS_OFF; 7124 } else { 7125 link->smps_mode = link->u.mgd.req_smps; 7126 } 7127 7128 return conn_flags; 7129 } 7130 7131 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 7132 struct cfg80211_assoc_request *req) 7133 { 7134 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 7135 struct ieee80211_local *local = sdata->local; 7136 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7137 struct ieee80211_mgd_assoc_data *assoc_data; 7138 const struct element *ssid_elem; 7139 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7140 ieee80211_conn_flags_t conn_flags = 0; 7141 struct ieee80211_link_data *link; 7142 struct cfg80211_bss *cbss; 7143 struct ieee80211_bss *bss; 7144 bool override; 7145 int i, err; 7146 size_t size = sizeof(*assoc_data) + req->ie_len; 7147 7148 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 7149 size += req->links[i].elems_len; 7150 7151 /* FIXME: no support for 4-addr MLO yet */ 7152 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 7153 return -EOPNOTSUPP; 7154 7155 assoc_data = kzalloc(size, GFP_KERNEL); 7156 if (!assoc_data) 7157 return -ENOMEM; 7158 7159 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 7160 7161 rcu_read_lock(); 7162 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 7163 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 7164 rcu_read_unlock(); 7165 kfree(assoc_data); 7166 return -EINVAL; 7167 } 7168 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 7169 assoc_data->ssid_len = ssid_elem->datalen; 7170 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 7171 vif_cfg->ssid_len = assoc_data->ssid_len; 7172 rcu_read_unlock(); 7173 7174 if (req->ap_mld_addr) { 7175 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7176 if (!req->links[i].bss) 7177 continue; 7178 link = sdata_dereference(sdata->link[i], sdata); 7179 if (link) 7180 ether_addr_copy(assoc_data->link[i].addr, 7181 link->conf->addr); 7182 else 7183 eth_random_addr(assoc_data->link[i].addr); 7184 } 7185 } else { 7186 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7187 } 7188 7189 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7190 7191 memcpy(assoc_data->ap_addr, 7192 req->ap_mld_addr ?: req->bss->bssid, 7193 ETH_ALEN); 7194 7195 if (ifmgd->associated) { 7196 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7197 7198 sdata_info(sdata, 7199 "disconnect from AP %pM for new assoc to %pM\n", 7200 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7201 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7202 WLAN_REASON_UNSPECIFIED, 7203 false, frame_buf); 7204 7205 ieee80211_report_disconnect(sdata, frame_buf, 7206 sizeof(frame_buf), true, 7207 WLAN_REASON_UNSPECIFIED, 7208 false); 7209 } 7210 7211 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7212 err = -EBUSY; 7213 goto err_free; 7214 } 7215 7216 if (ifmgd->assoc_data) { 7217 err = -EBUSY; 7218 goto err_free; 7219 } 7220 7221 if (ifmgd->auth_data) { 7222 bool match; 7223 7224 /* keep sta info, bssid if matching */ 7225 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7226 assoc_data->ap_addr) && 7227 ifmgd->auth_data->link_id == req->link_id; 7228 ieee80211_destroy_auth_data(sdata, match); 7229 } 7230 7231 /* prepare assoc data */ 7232 7233 bss = (void *)cbss->priv; 7234 assoc_data->wmm = bss->wmm_used && 7235 (local->hw.queues >= IEEE80211_NUM_ACS); 7236 7237 /* 7238 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7239 * We still associate in non-HT mode (11a/b/g) if any one of these 7240 * ciphers is configured as pairwise. 7241 * We can set this to true for non-11n hardware, that'll be checked 7242 * separately along with the peer capabilities. 7243 */ 7244 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7245 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7246 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7247 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7248 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7249 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7250 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7251 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7252 netdev_info(sdata->dev, 7253 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7254 } 7255 } 7256 7257 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7258 if (!bss->wmm_used) { 7259 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7260 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7261 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7262 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7263 netdev_info(sdata->dev, 7264 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7265 } 7266 7267 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7268 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7269 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7270 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7271 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7272 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7273 } 7274 7275 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7276 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7277 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7278 } 7279 7280 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7281 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7282 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7283 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7284 } 7285 7286 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7287 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7288 7289 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7290 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7291 sizeof(ifmgd->ht_capa_mask)); 7292 7293 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7294 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7295 sizeof(ifmgd->vht_capa_mask)); 7296 7297 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7298 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7299 sizeof(ifmgd->s1g_capa_mask)); 7300 7301 if (req->ie && req->ie_len) { 7302 memcpy(assoc_data->ie, req->ie, req->ie_len); 7303 assoc_data->ie_len = req->ie_len; 7304 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7305 } else { 7306 assoc_data->ie_pos = assoc_data->ie; 7307 } 7308 7309 if (req->fils_kek) { 7310 /* should already be checked in cfg80211 - so warn */ 7311 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7312 err = -EINVAL; 7313 goto err_free; 7314 } 7315 memcpy(assoc_data->fils_kek, req->fils_kek, 7316 req->fils_kek_len); 7317 assoc_data->fils_kek_len = req->fils_kek_len; 7318 } 7319 7320 if (req->fils_nonces) 7321 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7322 2 * FILS_NONCE_LEN); 7323 7324 /* default timeout */ 7325 assoc_data->timeout = jiffies; 7326 assoc_data->timeout_started = true; 7327 7328 assoc_data->assoc_link_id = assoc_link_id; 7329 7330 if (req->ap_mld_addr) { 7331 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7332 assoc_data->link[i].conn_flags = conn_flags; 7333 assoc_data->link[i].bss = req->links[i].bss; 7334 } 7335 7336 /* if there was no authentication, set up the link */ 7337 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7338 if (err) 7339 goto err_clear; 7340 } else { 7341 assoc_data->link[0].conn_flags = conn_flags; 7342 assoc_data->link[0].bss = cbss; 7343 } 7344 7345 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7346 if (WARN_ON(!link)) { 7347 err = -EINVAL; 7348 goto err_clear; 7349 } 7350 7351 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7352 conn_flags |= link->u.mgd.conn_flags; 7353 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7354 conn_flags, assoc_link_id); 7355 override = link->u.mgd.conn_flags != conn_flags; 7356 link->u.mgd.conn_flags |= conn_flags; 7357 7358 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7359 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7360 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7361 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7362 7363 if (bss->wmm_used && bss->uapsd_supported && 7364 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7365 assoc_data->uapsd = true; 7366 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7367 } else { 7368 assoc_data->uapsd = false; 7369 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7370 } 7371 7372 if (req->prev_bssid) 7373 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7374 7375 if (req->use_mfp) { 7376 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7377 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7378 } else { 7379 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7380 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7381 } 7382 7383 if (req->flags & ASSOC_REQ_USE_RRM) 7384 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7385 else 7386 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7387 7388 if (req->crypto.control_port) 7389 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7390 else 7391 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7392 7393 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7394 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7395 sdata->control_port_over_nl80211 = 7396 req->crypto.control_port_over_nl80211; 7397 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7398 7399 /* kick off associate process */ 7400 ifmgd->assoc_data = assoc_data; 7401 7402 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7403 if (!assoc_data->link[i].bss) 7404 continue; 7405 if (i == assoc_data->assoc_link_id) 7406 continue; 7407 /* only calculate the flags, hence link == NULL */ 7408 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7409 &assoc_data->link[i].conn_flags); 7410 if (err) 7411 goto err_clear; 7412 } 7413 7414 /* needed for transmitting the assoc frames properly */ 7415 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7416 7417 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7418 req->ap_mld_addr, true, override); 7419 if (err) 7420 goto err_clear; 7421 7422 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7423 link->u.mgd.conn_flags; 7424 7425 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7426 const struct cfg80211_bss_ies *beacon_ies; 7427 7428 rcu_read_lock(); 7429 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7430 7431 if (beacon_ies) { 7432 /* 7433 * Wait up to one beacon interval ... 7434 * should this be more if we miss one? 7435 */ 7436 sdata_info(sdata, "waiting for beacon from %pM\n", 7437 link->u.mgd.bssid); 7438 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7439 assoc_data->timeout_started = true; 7440 assoc_data->need_beacon = true; 7441 } 7442 rcu_read_unlock(); 7443 } 7444 7445 run_again(sdata, assoc_data->timeout); 7446 7447 return 0; 7448 err_clear: 7449 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7450 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7451 BSS_CHANGED_BSSID); 7452 ifmgd->assoc_data = NULL; 7453 err_free: 7454 kfree(assoc_data); 7455 return err; 7456 } 7457 7458 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7459 struct cfg80211_deauth_request *req) 7460 { 7461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7462 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7463 bool tx = !req->local_state_change; 7464 struct ieee80211_prep_tx_info info = { 7465 .subtype = IEEE80211_STYPE_DEAUTH, 7466 }; 7467 7468 if (ifmgd->auth_data && 7469 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7470 sdata_info(sdata, 7471 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7472 req->bssid, req->reason_code, 7473 ieee80211_get_reason_code_string(req->reason_code)); 7474 7475 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7476 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7477 IEEE80211_STYPE_DEAUTH, 7478 req->reason_code, tx, 7479 frame_buf); 7480 ieee80211_destroy_auth_data(sdata, false); 7481 ieee80211_report_disconnect(sdata, frame_buf, 7482 sizeof(frame_buf), true, 7483 req->reason_code, false); 7484 drv_mgd_complete_tx(sdata->local, sdata, &info); 7485 return 0; 7486 } 7487 7488 if (ifmgd->assoc_data && 7489 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7490 sdata_info(sdata, 7491 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7492 req->bssid, req->reason_code, 7493 ieee80211_get_reason_code_string(req->reason_code)); 7494 7495 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7496 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7497 IEEE80211_STYPE_DEAUTH, 7498 req->reason_code, tx, 7499 frame_buf); 7500 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7501 ieee80211_report_disconnect(sdata, frame_buf, 7502 sizeof(frame_buf), true, 7503 req->reason_code, false); 7504 return 0; 7505 } 7506 7507 if (ifmgd->associated && 7508 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7509 sdata_info(sdata, 7510 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7511 req->bssid, req->reason_code, 7512 ieee80211_get_reason_code_string(req->reason_code)); 7513 7514 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7515 req->reason_code, tx, frame_buf); 7516 ieee80211_report_disconnect(sdata, frame_buf, 7517 sizeof(frame_buf), true, 7518 req->reason_code, false); 7519 drv_mgd_complete_tx(sdata->local, sdata, &info); 7520 return 0; 7521 } 7522 7523 return -ENOTCONN; 7524 } 7525 7526 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7527 struct cfg80211_disassoc_request *req) 7528 { 7529 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7530 7531 if (!sdata->u.mgd.associated || 7532 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7533 return -ENOTCONN; 7534 7535 sdata_info(sdata, 7536 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7537 req->ap_addr, req->reason_code, 7538 ieee80211_get_reason_code_string(req->reason_code)); 7539 7540 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7541 req->reason_code, !req->local_state_change, 7542 frame_buf); 7543 7544 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7545 req->reason_code, false); 7546 7547 return 0; 7548 } 7549 7550 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7551 { 7552 wiphy_work_cancel(link->sdata->local->hw.wiphy, 7553 &link->u.mgd.request_smps_work); 7554 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 7555 &link->u.mgd.chswitch_work); 7556 } 7557 7558 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7559 { 7560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7561 7562 /* 7563 * Make sure some work items will not run after this, 7564 * they will not do anything but might not have been 7565 * cancelled when disconnecting. 7566 */ 7567 cancel_work_sync(&ifmgd->monitor_work); 7568 wiphy_work_cancel(sdata->local->hw.wiphy, 7569 &ifmgd->beacon_connection_loss_work); 7570 wiphy_work_cancel(sdata->local->hw.wiphy, 7571 &ifmgd->csa_connection_drop_work); 7572 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7573 7574 sdata_lock(sdata); 7575 if (ifmgd->assoc_data) 7576 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7577 if (ifmgd->auth_data) 7578 ieee80211_destroy_auth_data(sdata, false); 7579 spin_lock_bh(&ifmgd->teardown_lock); 7580 if (ifmgd->teardown_skb) { 7581 kfree_skb(ifmgd->teardown_skb); 7582 ifmgd->teardown_skb = NULL; 7583 ifmgd->orig_teardown_skb = NULL; 7584 } 7585 kfree(ifmgd->assoc_req_ies); 7586 ifmgd->assoc_req_ies = NULL; 7587 ifmgd->assoc_req_ies_len = 0; 7588 spin_unlock_bh(&ifmgd->teardown_lock); 7589 del_timer_sync(&ifmgd->timer); 7590 sdata_unlock(sdata); 7591 } 7592 7593 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7594 enum nl80211_cqm_rssi_threshold_event rssi_event, 7595 s32 rssi_level, 7596 gfp_t gfp) 7597 { 7598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7599 7600 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7601 7602 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7603 } 7604 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7605 7606 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7607 { 7608 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7609 7610 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7611 7612 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7613 } 7614 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7615 7616 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7617 int rssi_min_thold, 7618 int rssi_max_thold) 7619 { 7620 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7621 7622 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7623 return; 7624 7625 /* 7626 * Scale up threshold values before storing it, as the RSSI averaging 7627 * algorithm uses a scaled up value as well. Change this scaling 7628 * factor if the RSSI averaging algorithm changes. 7629 */ 7630 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7631 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7632 } 7633 7634 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7635 int rssi_min_thold, 7636 int rssi_max_thold) 7637 { 7638 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7639 7640 WARN_ON(rssi_min_thold == rssi_max_thold || 7641 rssi_min_thold > rssi_max_thold); 7642 7643 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7644 rssi_max_thold); 7645 } 7646 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7647 7648 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7649 { 7650 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7651 7652 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7653 } 7654 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7655