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 - 2022 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 * We can have multiple work items (and connection probing) 93 * scheduling this timer, but we need to take care to only 94 * reschedule it when it should fire _earlier_ than it was 95 * asked for before, or if it's not pending right now. This 96 * function ensures that. Note that it then is required to 97 * run this function for all timeouts after the first one 98 * has happened -- the work that runs from this timer will 99 * do that. 100 */ 101 static void run_again(struct ieee80211_sub_if_data *sdata, 102 unsigned long timeout) 103 { 104 sdata_assert_lock(sdata); 105 106 if (!timer_pending(&sdata->u.mgd.timer) || 107 time_before(timeout, sdata->u.mgd.timer.expires)) 108 mod_timer(&sdata->u.mgd.timer, timeout); 109 } 110 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 112 { 113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 114 return; 115 116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 117 return; 118 119 mod_timer(&sdata->u.mgd.bcn_mon_timer, 120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 121 } 122 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 124 { 125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 126 127 if (unlikely(!ifmgd->associated)) 128 return; 129 130 if (ifmgd->probe_send_count) 131 ifmgd->probe_send_count = 0; 132 133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 134 return; 135 136 mod_timer(&ifmgd->conn_mon_timer, 137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 138 } 139 140 static int ecw2cw(int ecw) 141 { 142 return (1 << ecw) - 1; 143 } 144 145 static ieee80211_conn_flags_t 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 147 struct ieee80211_link_data *link, 148 ieee80211_conn_flags_t conn_flags, 149 struct ieee80211_supported_band *sband, 150 struct ieee80211_channel *channel, 151 u32 vht_cap_info, 152 const struct ieee80211_ht_operation *ht_oper, 153 const struct ieee80211_vht_operation *vht_oper, 154 const struct ieee80211_he_operation *he_oper, 155 const struct ieee80211_eht_operation *eht_oper, 156 const struct ieee80211_s1g_oper_ie *s1g_oper, 157 struct cfg80211_chan_def *chandef, bool tracking) 158 { 159 struct cfg80211_chan_def vht_chandef; 160 struct ieee80211_sta_ht_cap sta_ht_cap; 161 ieee80211_conn_flags_t ret; 162 u32 ht_cfreq; 163 164 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 165 chandef->chan = channel; 166 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 167 chandef->center_freq1 = channel->center_freq; 168 chandef->freq1_offset = channel->freq_offset; 169 170 if (channel->band == NL80211_BAND_6GHZ) { 171 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 172 chandef)) { 173 mlme_dbg(sdata, 174 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 175 ret = IEEE80211_CONN_DISABLE_HT | 176 IEEE80211_CONN_DISABLE_VHT | 177 IEEE80211_CONN_DISABLE_HE | 178 IEEE80211_CONN_DISABLE_EHT; 179 } else { 180 ret = 0; 181 } 182 vht_chandef = *chandef; 183 goto out; 184 } else if (sband->band == NL80211_BAND_S1GHZ) { 185 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 186 sdata_info(sdata, 187 "Missing S1G Operation Element? Trying operating == primary\n"); 188 chandef->width = ieee80211_s1g_channel_width(channel); 189 } 190 191 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 192 IEEE80211_CONN_DISABLE_VHT | 193 IEEE80211_CONN_DISABLE_80P80MHZ | 194 IEEE80211_CONN_DISABLE_160MHZ; 195 goto out; 196 } 197 198 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 199 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 200 201 if (!ht_oper || !sta_ht_cap.ht_supported) { 202 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 203 ret = IEEE80211_CONN_DISABLE_HT | 204 IEEE80211_CONN_DISABLE_VHT | 205 IEEE80211_CONN_DISABLE_HE | 206 IEEE80211_CONN_DISABLE_EHT; 207 goto out; 208 } 209 210 chandef->width = NL80211_CHAN_WIDTH_20; 211 212 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 213 channel->band); 214 /* check that channel matches the right operating channel */ 215 if (!tracking && channel->center_freq != ht_cfreq) { 216 /* 217 * It's possible that some APs are confused here; 218 * Netgear WNDR3700 sometimes reports 4 higher than 219 * the actual channel in association responses, but 220 * since we look at probe response/beacon data here 221 * it should be OK. 222 */ 223 sdata_info(sdata, 224 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 225 channel->center_freq, ht_cfreq, 226 ht_oper->primary_chan, channel->band); 227 ret = IEEE80211_CONN_DISABLE_HT | 228 IEEE80211_CONN_DISABLE_VHT | 229 IEEE80211_CONN_DISABLE_HE | 230 IEEE80211_CONN_DISABLE_EHT; 231 goto out; 232 } 233 234 /* check 40 MHz support, if we have it */ 235 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 236 ieee80211_chandef_ht_oper(ht_oper, chandef); 237 } else { 238 mlme_dbg(sdata, "40 MHz not supported\n"); 239 /* 40 MHz (and 80 MHz) must be supported for VHT */ 240 ret = IEEE80211_CONN_DISABLE_VHT; 241 /* also mark 40 MHz disabled */ 242 ret |= IEEE80211_CONN_DISABLE_40MHZ; 243 goto out; 244 } 245 246 if (!vht_oper || !sband->vht_cap.vht_supported) { 247 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 248 ret = IEEE80211_CONN_DISABLE_VHT; 249 goto out; 250 } 251 252 vht_chandef = *chandef; 253 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 254 he_oper && 255 (le32_to_cpu(he_oper->he_oper_params) & 256 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 257 struct ieee80211_vht_operation he_oper_vht_cap; 258 259 /* 260 * Set only first 3 bytes (other 2 aren't used in 261 * ieee80211_chandef_vht_oper() anyway) 262 */ 263 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 264 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 265 266 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 267 &he_oper_vht_cap, ht_oper, 268 &vht_chandef)) { 269 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 270 sdata_info(sdata, 271 "HE AP VHT information is invalid, disabling HE\n"); 272 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 273 goto out; 274 } 275 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 276 vht_cap_info, 277 vht_oper, ht_oper, 278 &vht_chandef)) { 279 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 280 sdata_info(sdata, 281 "AP VHT information is invalid, disabling VHT\n"); 282 ret = IEEE80211_CONN_DISABLE_VHT; 283 goto out; 284 } 285 286 if (!cfg80211_chandef_valid(&vht_chandef)) { 287 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 288 sdata_info(sdata, 289 "AP VHT information is invalid, disabling VHT\n"); 290 ret = IEEE80211_CONN_DISABLE_VHT; 291 goto out; 292 } 293 294 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 295 ret = 0; 296 goto out; 297 } 298 299 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 300 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 301 sdata_info(sdata, 302 "AP VHT information doesn't match HT, disabling VHT\n"); 303 ret = IEEE80211_CONN_DISABLE_VHT; 304 goto out; 305 } 306 307 *chandef = vht_chandef; 308 309 /* 310 * handle the case that the EHT operation indicates that it holds EHT 311 * operation information (in case that the channel width differs from 312 * the channel width reported in HT/VHT/HE). 313 */ 314 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 315 struct cfg80211_chan_def eht_chandef = *chandef; 316 317 ieee80211_chandef_eht_oper(eht_oper, 318 eht_chandef.width == 319 NL80211_CHAN_WIDTH_160, 320 false, &eht_chandef); 321 322 if (!cfg80211_chandef_valid(&eht_chandef)) { 323 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 324 sdata_info(sdata, 325 "AP EHT information is invalid, disabling EHT\n"); 326 ret = IEEE80211_CONN_DISABLE_EHT; 327 goto out; 328 } 329 330 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 331 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 332 sdata_info(sdata, 333 "AP EHT information is incompatible, disabling EHT\n"); 334 ret = IEEE80211_CONN_DISABLE_EHT; 335 goto out; 336 } 337 338 *chandef = eht_chandef; 339 } 340 341 ret = 0; 342 343 out: 344 /* 345 * When tracking the current AP, don't do any further checks if the 346 * new chandef is identical to the one we're currently using for the 347 * connection. This keeps us from playing ping-pong with regulatory, 348 * without it the following can happen (for example): 349 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 350 * - AP advertises regdom US 351 * - CRDA loads regdom US with 80 MHz prohibited (old database) 352 * - the code below detects an unsupported channel, downgrades, and 353 * we disconnect from the AP in the caller 354 * - disconnect causes CRDA to reload world regdomain and the game 355 * starts anew. 356 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 357 * 358 * It seems possible that there are still scenarios with CSA or real 359 * bandwidth changes where a this could happen, but those cases are 360 * less common and wouldn't completely prevent using the AP. 361 */ 362 if (tracking && 363 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 364 return ret; 365 366 /* don't print the message below for VHT mismatch if VHT is disabled */ 367 if (ret & IEEE80211_CONN_DISABLE_VHT) 368 vht_chandef = *chandef; 369 370 /* 371 * Ignore the DISABLED flag when we're already connected and only 372 * tracking the APs beacon for bandwidth changes - otherwise we 373 * might get disconnected here if we connect to an AP, update our 374 * regulatory information based on the AP's country IE and the 375 * information we have is wrong/outdated and disables the channel 376 * that we're actually using for the connection to the AP. 377 */ 378 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 379 tracking ? 0 : 380 IEEE80211_CHAN_DISABLED)) { 381 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 382 ret = IEEE80211_CONN_DISABLE_HT | 383 IEEE80211_CONN_DISABLE_VHT | 384 IEEE80211_CONN_DISABLE_HE | 385 IEEE80211_CONN_DISABLE_EHT; 386 break; 387 } 388 389 ret |= ieee80211_chandef_downgrade(chandef); 390 } 391 392 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 393 IEEE80211_CHAN_NO_HE)) 394 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 395 396 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 397 IEEE80211_CHAN_NO_EHT)) 398 ret |= IEEE80211_CONN_DISABLE_EHT; 399 400 if (chandef->width != vht_chandef.width && !tracking) 401 sdata_info(sdata, 402 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 403 404 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 405 return ret; 406 } 407 408 static int ieee80211_config_bw(struct ieee80211_link_data *link, 409 const struct ieee80211_ht_cap *ht_cap, 410 const struct ieee80211_vht_cap *vht_cap, 411 const struct ieee80211_ht_operation *ht_oper, 412 const struct ieee80211_vht_operation *vht_oper, 413 const struct ieee80211_he_operation *he_oper, 414 const struct ieee80211_eht_operation *eht_oper, 415 const struct ieee80211_s1g_oper_ie *s1g_oper, 416 const u8 *bssid, u32 *changed) 417 { 418 struct ieee80211_sub_if_data *sdata = link->sdata; 419 struct ieee80211_local *local = sdata->local; 420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 421 struct ieee80211_channel *chan = link->conf->chandef.chan; 422 struct ieee80211_supported_band *sband = 423 local->hw.wiphy->bands[chan->band]; 424 struct cfg80211_chan_def chandef; 425 u16 ht_opmode; 426 ieee80211_conn_flags_t flags; 427 u32 vht_cap_info = 0; 428 int ret; 429 430 /* if HT was/is disabled, don't track any bandwidth changes */ 431 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 432 return 0; 433 434 /* don't check VHT if we associated as non-VHT station */ 435 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 436 vht_oper = NULL; 437 438 /* don't check HE if we associated as non-HE station */ 439 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 440 !ieee80211_get_he_iftype_cap(sband, 441 ieee80211_vif_type_p2p(&sdata->vif))) { 442 he_oper = NULL; 443 eht_oper = NULL; 444 } 445 446 /* don't check EHT if we associated as non-EHT station */ 447 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 448 !ieee80211_get_eht_iftype_cap(sband, 449 ieee80211_vif_type_p2p(&sdata->vif))) 450 eht_oper = NULL; 451 452 /* 453 * if bss configuration changed store the new one - 454 * this may be applicable even if channel is identical 455 */ 456 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 457 if (link->conf->ht_operation_mode != ht_opmode) { 458 *changed |= BSS_CHANGED_HT; 459 link->conf->ht_operation_mode = ht_opmode; 460 } 461 462 if (vht_cap) 463 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 464 465 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 466 flags = ieee80211_determine_chantype(sdata, link, 467 link->u.mgd.conn_flags, 468 sband, chan, vht_cap_info, 469 ht_oper, vht_oper, 470 he_oper, eht_oper, 471 s1g_oper, &chandef, true); 472 473 /* 474 * Downgrade the new channel if we associated with restricted 475 * capabilities. For example, if we associated as a 20 MHz STA 476 * to a 40 MHz AP (due to regulatory, capabilities or config 477 * reasons) then switching to a 40 MHz channel now won't do us 478 * any good -- we couldn't use it with the AP. 479 */ 480 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 481 chandef.width == NL80211_CHAN_WIDTH_80P80) 482 flags |= ieee80211_chandef_downgrade(&chandef); 483 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 484 chandef.width == NL80211_CHAN_WIDTH_160) 485 flags |= ieee80211_chandef_downgrade(&chandef); 486 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 487 chandef.width > NL80211_CHAN_WIDTH_20) 488 flags |= ieee80211_chandef_downgrade(&chandef); 489 490 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 491 return 0; 492 493 link_info(link, 494 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 495 link->u.mgd.bssid, chandef.chan->center_freq, 496 chandef.chan->freq_offset, chandef.width, 497 chandef.center_freq1, chandef.freq1_offset, 498 chandef.center_freq2); 499 500 if (flags != (link->u.mgd.conn_flags & 501 (IEEE80211_CONN_DISABLE_HT | 502 IEEE80211_CONN_DISABLE_VHT | 503 IEEE80211_CONN_DISABLE_HE | 504 IEEE80211_CONN_DISABLE_EHT | 505 IEEE80211_CONN_DISABLE_40MHZ | 506 IEEE80211_CONN_DISABLE_80P80MHZ | 507 IEEE80211_CONN_DISABLE_160MHZ | 508 IEEE80211_CONN_DISABLE_320MHZ)) || 509 !cfg80211_chandef_valid(&chandef)) { 510 sdata_info(sdata, 511 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 512 link->u.mgd.bssid, flags, ifmgd->flags); 513 return -EINVAL; 514 } 515 516 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 517 518 if (ret) { 519 sdata_info(sdata, 520 "AP %pM changed bandwidth to incompatible one - disconnect\n", 521 link->u.mgd.bssid); 522 return ret; 523 } 524 525 return 0; 526 } 527 528 /* frame sending functions */ 529 530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 531 struct sk_buff *skb, u8 ap_ht_param, 532 struct ieee80211_supported_band *sband, 533 struct ieee80211_channel *channel, 534 enum ieee80211_smps_mode smps, 535 ieee80211_conn_flags_t conn_flags) 536 { 537 u8 *pos; 538 u32 flags = channel->flags; 539 u16 cap; 540 struct ieee80211_sta_ht_cap ht_cap; 541 542 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 543 544 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 545 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 546 547 /* determine capability flags */ 548 cap = ht_cap.cap; 549 550 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 551 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 552 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 553 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 554 cap &= ~IEEE80211_HT_CAP_SGI_40; 555 } 556 break; 557 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 558 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 559 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 560 cap &= ~IEEE80211_HT_CAP_SGI_40; 561 } 562 break; 563 } 564 565 /* 566 * If 40 MHz was disabled associate as though we weren't 567 * capable of 40 MHz -- some broken APs will never fall 568 * back to trying to transmit in 20 MHz. 569 */ 570 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 571 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 572 cap &= ~IEEE80211_HT_CAP_SGI_40; 573 } 574 575 /* set SM PS mode properly */ 576 cap &= ~IEEE80211_HT_CAP_SM_PS; 577 switch (smps) { 578 case IEEE80211_SMPS_AUTOMATIC: 579 case IEEE80211_SMPS_NUM_MODES: 580 WARN_ON(1); 581 fallthrough; 582 case IEEE80211_SMPS_OFF: 583 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 584 IEEE80211_HT_CAP_SM_PS_SHIFT; 585 break; 586 case IEEE80211_SMPS_STATIC: 587 cap |= WLAN_HT_CAP_SM_PS_STATIC << 588 IEEE80211_HT_CAP_SM_PS_SHIFT; 589 break; 590 case IEEE80211_SMPS_DYNAMIC: 591 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 592 IEEE80211_HT_CAP_SM_PS_SHIFT; 593 break; 594 } 595 596 /* reserve and fill IE */ 597 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 598 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 599 } 600 601 /* This function determines vht capability flags for the association 602 * and builds the IE. 603 * Note - the function returns true to own the MU-MIMO capability 604 */ 605 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 606 struct sk_buff *skb, 607 struct ieee80211_supported_band *sband, 608 struct ieee80211_vht_cap *ap_vht_cap, 609 ieee80211_conn_flags_t conn_flags) 610 { 611 struct ieee80211_local *local = sdata->local; 612 u8 *pos; 613 u32 cap; 614 struct ieee80211_sta_vht_cap vht_cap; 615 u32 mask, ap_bf_sts, our_bf_sts; 616 bool mu_mimo_owner = false; 617 618 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 619 620 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 621 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 622 623 /* determine capability flags */ 624 cap = vht_cap.cap; 625 626 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 627 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 628 629 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 630 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 631 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 632 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 633 } 634 635 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 636 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 637 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 638 } 639 640 /* 641 * Some APs apparently get confused if our capabilities are better 642 * than theirs, so restrict what we advertise in the assoc request. 643 */ 644 if (!(ap_vht_cap->vht_cap_info & 645 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 646 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 647 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 648 else if (!(ap_vht_cap->vht_cap_info & 649 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 650 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 651 652 /* 653 * If some other vif is using the MU-MIMO capability we cannot associate 654 * using MU-MIMO - this will lead to contradictions in the group-id 655 * mechanism. 656 * Ownership is defined since association request, in order to avoid 657 * simultaneous associations with MU-MIMO. 658 */ 659 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 660 bool disable_mu_mimo = false; 661 struct ieee80211_sub_if_data *other; 662 663 list_for_each_entry_rcu(other, &local->interfaces, list) { 664 if (other->vif.bss_conf.mu_mimo_owner) { 665 disable_mu_mimo = true; 666 break; 667 } 668 } 669 if (disable_mu_mimo) 670 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 671 else 672 mu_mimo_owner = true; 673 } 674 675 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 676 677 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 678 our_bf_sts = cap & mask; 679 680 if (ap_bf_sts < our_bf_sts) { 681 cap &= ~mask; 682 cap |= ap_bf_sts; 683 } 684 685 /* reserve and fill IE */ 686 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 687 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 688 689 return mu_mimo_owner; 690 } 691 692 /* This function determines HE capability flags for the association 693 * and builds the IE. 694 */ 695 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 696 struct sk_buff *skb, 697 struct ieee80211_supported_band *sband, 698 enum ieee80211_smps_mode smps_mode, 699 ieee80211_conn_flags_t conn_flags) 700 { 701 u8 *pos, *pre_he_pos; 702 const struct ieee80211_sta_he_cap *he_cap; 703 u8 he_cap_size; 704 705 he_cap = ieee80211_get_he_iftype_cap(sband, 706 ieee80211_vif_type_p2p(&sdata->vif)); 707 if (WARN_ON(!he_cap)) 708 return; 709 710 /* get a max size estimate */ 711 he_cap_size = 712 2 + 1 + sizeof(he_cap->he_cap_elem) + 713 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 714 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 715 he_cap->he_cap_elem.phy_cap_info); 716 pos = skb_put(skb, he_cap_size); 717 pre_he_pos = pos; 718 pos = ieee80211_ie_build_he_cap(conn_flags, 719 pos, he_cap, pos + he_cap_size); 720 /* trim excess if any */ 721 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 722 723 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 724 } 725 726 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 727 struct sk_buff *skb, 728 struct ieee80211_supported_band *sband) 729 { 730 u8 *pos; 731 const struct ieee80211_sta_he_cap *he_cap; 732 const struct ieee80211_sta_eht_cap *eht_cap; 733 u8 eht_cap_size; 734 735 he_cap = ieee80211_get_he_iftype_cap(sband, 736 ieee80211_vif_type_p2p(&sdata->vif)); 737 eht_cap = ieee80211_get_eht_iftype_cap(sband, 738 ieee80211_vif_type_p2p(&sdata->vif)); 739 740 /* 741 * EHT capabilities element is only added if the HE capabilities element 742 * was added so assume that 'he_cap' is valid and don't check it. 743 */ 744 if (WARN_ON(!he_cap || !eht_cap)) 745 return; 746 747 eht_cap_size = 748 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 749 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 750 &eht_cap->eht_cap_elem, 751 false) + 752 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 753 eht_cap->eht_cap_elem.phy_cap_info); 754 pos = skb_put(skb, eht_cap_size); 755 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 756 false); 757 } 758 759 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 760 enum nl80211_chan_width width, 761 struct ieee80211_supported_band *sband, 762 struct ieee80211_mgd_assoc_data *assoc_data) 763 { 764 unsigned int shift = ieee80211_chanwidth_get_shift(width); 765 unsigned int rates_len, supp_rates_len; 766 u32 rates = 0; 767 int i, count; 768 u8 *pos; 769 770 if (assoc_data->supp_rates_len) { 771 /* 772 * Get all rates supported by the device and the AP as 773 * some APs don't like getting a superset of their rates 774 * in the association request (e.g. D-Link DAP 1353 in 775 * b-only mode)... 776 */ 777 rates_len = ieee80211_parse_bitrates(width, sband, 778 assoc_data->supp_rates, 779 assoc_data->supp_rates_len, 780 &rates); 781 } else { 782 /* 783 * In case AP not provide any supported rates information 784 * before association, we send information element(s) with 785 * all rates that we support. 786 */ 787 rates_len = sband->n_bitrates; 788 for (i = 0; i < sband->n_bitrates; i++) 789 rates |= BIT(i); 790 } 791 792 supp_rates_len = rates_len; 793 if (supp_rates_len > 8) 794 supp_rates_len = 8; 795 796 pos = skb_put(skb, supp_rates_len + 2); 797 *pos++ = WLAN_EID_SUPP_RATES; 798 *pos++ = supp_rates_len; 799 800 count = 0; 801 for (i = 0; i < sband->n_bitrates; i++) { 802 if (BIT(i) & rates) { 803 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 804 5 * (1 << shift)); 805 *pos++ = (u8)rate; 806 if (++count == 8) 807 break; 808 } 809 } 810 811 if (rates_len > count) { 812 pos = skb_put(skb, rates_len - count + 2); 813 *pos++ = WLAN_EID_EXT_SUPP_RATES; 814 *pos++ = rates_len - count; 815 816 for (i++; i < sband->n_bitrates; i++) { 817 if (BIT(i) & rates) { 818 int rate; 819 820 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 821 5 * (1 << shift)); 822 *pos++ = (u8)rate; 823 } 824 } 825 } 826 } 827 828 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 829 const u8 *elems, 830 size_t elems_len, 831 size_t offset) 832 { 833 size_t noffset; 834 835 static const u8 before_ht[] = { 836 WLAN_EID_SSID, 837 WLAN_EID_SUPP_RATES, 838 WLAN_EID_EXT_SUPP_RATES, 839 WLAN_EID_PWR_CAPABILITY, 840 WLAN_EID_SUPPORTED_CHANNELS, 841 WLAN_EID_RSN, 842 WLAN_EID_QOS_CAPA, 843 WLAN_EID_RRM_ENABLED_CAPABILITIES, 844 WLAN_EID_MOBILITY_DOMAIN, 845 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 846 WLAN_EID_RIC_DATA, /* reassoc only */ 847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 848 }; 849 static const u8 after_ric[] = { 850 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 851 WLAN_EID_HT_CAPABILITY, 852 WLAN_EID_BSS_COEX_2040, 853 /* luckily this is almost always there */ 854 WLAN_EID_EXT_CAPABILITY, 855 WLAN_EID_QOS_TRAFFIC_CAPA, 856 WLAN_EID_TIM_BCAST_REQ, 857 WLAN_EID_INTERWORKING, 858 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 859 WLAN_EID_VHT_CAPABILITY, 860 WLAN_EID_OPMODE_NOTIF, 861 }; 862 863 if (!elems_len) 864 return offset; 865 866 noffset = ieee80211_ie_split_ric(elems, elems_len, 867 before_ht, 868 ARRAY_SIZE(before_ht), 869 after_ric, 870 ARRAY_SIZE(after_ric), 871 offset); 872 skb_put_data(skb, elems + offset, noffset - offset); 873 874 return noffset; 875 } 876 877 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 878 const u8 *elems, 879 size_t elems_len, 880 size_t offset) 881 { 882 static const u8 before_vht[] = { 883 /* 884 * no need to list the ones split off before HT 885 * or generated here 886 */ 887 WLAN_EID_BSS_COEX_2040, 888 WLAN_EID_EXT_CAPABILITY, 889 WLAN_EID_QOS_TRAFFIC_CAPA, 890 WLAN_EID_TIM_BCAST_REQ, 891 WLAN_EID_INTERWORKING, 892 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 893 }; 894 size_t noffset; 895 896 if (!elems_len) 897 return offset; 898 899 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 900 noffset = ieee80211_ie_split(elems, elems_len, 901 before_vht, ARRAY_SIZE(before_vht), 902 offset); 903 skb_put_data(skb, elems + offset, noffset - offset); 904 905 return noffset; 906 } 907 908 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 909 const u8 *elems, 910 size_t elems_len, 911 size_t offset) 912 { 913 static const u8 before_he[] = { 914 /* 915 * no need to list the ones split off before VHT 916 * or generated here 917 */ 918 WLAN_EID_OPMODE_NOTIF, 919 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 920 /* 11ai elements */ 921 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 922 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 923 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 924 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 925 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 926 /* TODO: add 11ah/11aj/11ak elements */ 927 }; 928 size_t noffset; 929 930 if (!elems_len) 931 return offset; 932 933 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 934 noffset = ieee80211_ie_split(elems, elems_len, 935 before_he, ARRAY_SIZE(before_he), 936 offset); 937 skb_put_data(skb, elems + offset, noffset - offset); 938 939 return noffset; 940 } 941 942 #define PRESENT_ELEMS_MAX 8 943 #define PRESENT_ELEM_EXT_OFFS 0x100 944 945 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 946 struct sk_buff *skb, u16 capab, 947 const struct element *ext_capa, 948 const u16 *present_elems); 949 950 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 951 struct sk_buff *skb, u16 *capab, 952 const struct element *ext_capa, 953 const u8 *extra_elems, 954 size_t extra_elems_len, 955 unsigned int link_id, 956 struct ieee80211_link_data *link, 957 u16 *present_elems) 958 { 959 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 961 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 962 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 963 struct ieee80211_channel *chan = cbss->channel; 964 const struct ieee80211_sband_iftype_data *iftd; 965 struct ieee80211_local *local = sdata->local; 966 struct ieee80211_supported_band *sband; 967 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 968 struct ieee80211_chanctx_conf *chanctx_conf; 969 enum ieee80211_smps_mode smps_mode; 970 u16 orig_capab = *capab; 971 size_t offset = 0; 972 int present_elems_len = 0; 973 u8 *pos; 974 int i; 975 976 #define ADD_PRESENT_ELEM(id) do { \ 977 /* need a last for termination - we use 0 == SSID */ \ 978 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 979 present_elems[present_elems_len++] = (id); \ 980 } while (0) 981 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 982 983 if (link) 984 smps_mode = link->smps_mode; 985 else if (sdata->u.mgd.powersave) 986 smps_mode = IEEE80211_SMPS_DYNAMIC; 987 else 988 smps_mode = IEEE80211_SMPS_OFF; 989 990 if (link) { 991 /* 992 * 5/10 MHz scenarios are only viable without MLO, in which 993 * case this pointer should be used ... All of this is a bit 994 * unclear though, not sure this even works at all. 995 */ 996 rcu_read_lock(); 997 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 998 if (chanctx_conf) 999 width = chanctx_conf->def.width; 1000 rcu_read_unlock(); 1001 } 1002 1003 sband = local->hw.wiphy->bands[chan->band]; 1004 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1005 1006 if (sband->band == NL80211_BAND_2GHZ) { 1007 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1008 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1009 } 1010 1011 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1012 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1013 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1014 1015 if (sband->band != NL80211_BAND_S1GHZ) 1016 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1017 1018 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1019 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1020 struct cfg80211_chan_def chandef = { 1021 .width = width, 1022 .chan = chan, 1023 }; 1024 1025 pos = skb_put(skb, 4); 1026 *pos++ = WLAN_EID_PWR_CAPABILITY; 1027 *pos++ = 2; 1028 *pos++ = 0; /* min tx power */ 1029 /* max tx power */ 1030 *pos++ = ieee80211_chandef_max_power(&chandef); 1031 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1032 } 1033 1034 /* 1035 * Per spec, we shouldn't include the list of channels if we advertise 1036 * support for extended channel switching, but we've always done that; 1037 * (for now?) apply this restriction only on the (new) 6 GHz band. 1038 */ 1039 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1040 (sband->band != NL80211_BAND_6GHZ || 1041 !ext_capa || ext_capa->datalen < 1 || 1042 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1043 /* TODO: get this in reg domain format */ 1044 pos = skb_put(skb, 2 * sband->n_channels + 2); 1045 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1046 *pos++ = 2 * sband->n_channels; 1047 for (i = 0; i < sband->n_channels; i++) { 1048 int cf = sband->channels[i].center_freq; 1049 1050 *pos++ = ieee80211_frequency_to_channel(cf); 1051 *pos++ = 1; /* one channel in the subband*/ 1052 } 1053 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1054 } 1055 1056 /* if present, add any custom IEs that go before HT */ 1057 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1058 extra_elems_len, 1059 offset); 1060 1061 if (sband->band != NL80211_BAND_6GHZ && 1062 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1063 ieee80211_add_ht_ie(sdata, skb, 1064 assoc_data->link[link_id].ap_ht_param, 1065 sband, chan, smps_mode, 1066 assoc_data->link[link_id].conn_flags); 1067 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1068 } 1069 1070 /* if present, add any custom IEs that go before VHT */ 1071 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1072 extra_elems_len, 1073 offset); 1074 1075 if (sband->band != NL80211_BAND_6GHZ && 1076 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1077 bool mu_mimo_owner = 1078 ieee80211_add_vht_ie(sdata, skb, sband, 1079 &assoc_data->link[link_id].ap_vht_cap, 1080 assoc_data->link[link_id].conn_flags); 1081 1082 if (link) 1083 link->conf->mu_mimo_owner = mu_mimo_owner; 1084 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1085 } 1086 1087 /* 1088 * If AP doesn't support HT, mark HE and EHT as disabled. 1089 * If on the 5GHz band, make sure it supports VHT. 1090 */ 1091 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1092 (sband->band == NL80211_BAND_5GHZ && 1093 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1094 assoc_data->link[link_id].conn_flags |= 1095 IEEE80211_CONN_DISABLE_HE | 1096 IEEE80211_CONN_DISABLE_EHT; 1097 1098 /* if present, add any custom IEs that go before HE */ 1099 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1100 extra_elems_len, 1101 offset); 1102 1103 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1104 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1105 assoc_data->link[link_id].conn_flags); 1106 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1107 } 1108 1109 /* 1110 * careful - need to know about all the present elems before 1111 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1112 * we're going to put it after the ML element 1113 */ 1114 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1115 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1116 1117 if (link_id == assoc_data->assoc_link_id) 1118 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1119 present_elems); 1120 1121 /* crash if somebody gets it wrong */ 1122 present_elems = NULL; 1123 1124 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1125 ieee80211_add_eht_ie(sdata, skb, sband); 1126 1127 if (sband->band == NL80211_BAND_S1GHZ) { 1128 ieee80211_add_aid_request_ie(sdata, skb); 1129 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1130 } 1131 1132 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1133 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1134 1135 if (link) 1136 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1137 1138 return offset; 1139 } 1140 1141 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1142 const u16 *outer, 1143 const u16 *inner) 1144 { 1145 unsigned int skb_len = skb->len; 1146 bool added = false; 1147 int i, j; 1148 u8 *len, *list_len = NULL; 1149 1150 skb_put_u8(skb, WLAN_EID_EXTENSION); 1151 len = skb_put(skb, 1); 1152 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1153 1154 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1155 u16 elem = outer[i]; 1156 bool have_inner = false; 1157 bool at_extension = false; 1158 1159 /* should at least be sorted in the sense of normal -> ext */ 1160 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1161 1162 /* switch to extension list */ 1163 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1164 at_extension = true; 1165 if (!list_len) 1166 skb_put_u8(skb, 0); 1167 list_len = NULL; 1168 } 1169 1170 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1171 if (elem == inner[j]) { 1172 have_inner = true; 1173 break; 1174 } 1175 } 1176 1177 if (have_inner) 1178 continue; 1179 1180 if (!list_len) { 1181 list_len = skb_put(skb, 1); 1182 *list_len = 0; 1183 } 1184 *list_len += 1; 1185 skb_put_u8(skb, (u8)elem); 1186 } 1187 1188 if (!added) 1189 skb_trim(skb, skb_len); 1190 else 1191 *len = skb->len - skb_len - 2; 1192 } 1193 1194 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1195 struct sk_buff *skb, u16 capab, 1196 const struct element *ext_capa, 1197 const u16 *outer_present_elems) 1198 { 1199 struct ieee80211_local *local = sdata->local; 1200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1201 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1202 struct ieee80211_multi_link_elem *ml_elem; 1203 struct ieee80211_mle_basic_common_info *common; 1204 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1205 __le16 eml_capa = 0, mld_capa_ops = 0; 1206 unsigned int link_id; 1207 u8 *ml_elem_len; 1208 void *capab_pos; 1209 1210 if (!sdata->vif.valid_links) 1211 return; 1212 1213 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1214 ieee80211_vif_type_p2p(&sdata->vif)); 1215 if (ift_ext_capa) { 1216 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1217 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1218 } 1219 1220 skb_put_u8(skb, WLAN_EID_EXTENSION); 1221 ml_elem_len = skb_put(skb, 1); 1222 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1223 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1224 ml_elem->control = 1225 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1226 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1227 common = skb_put(skb, sizeof(*common)); 1228 common->len = sizeof(*common) + 1229 2; /* MLD capa/ops */ 1230 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1231 1232 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1233 if (eml_capa & 1234 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1235 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1236 common->len += 2; /* EML capabilities */ 1237 ml_elem->control |= 1238 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1239 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1240 } 1241 /* need indication from userspace to support this */ 1242 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1243 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1244 1245 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1246 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1247 const u8 *extra_elems; 1248 size_t extra_elems_len; 1249 size_t extra_used; 1250 u8 *subelem_len = NULL; 1251 __le16 ctrl; 1252 1253 if (!assoc_data->link[link_id].bss || 1254 link_id == assoc_data->assoc_link_id) 1255 continue; 1256 1257 extra_elems = assoc_data->link[link_id].elems; 1258 extra_elems_len = assoc_data->link[link_id].elems_len; 1259 1260 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1261 subelem_len = skb_put(skb, 1); 1262 1263 ctrl = cpu_to_le16(link_id | 1264 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1265 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1266 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1267 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1268 skb_put_data(skb, assoc_data->link[link_id].addr, 1269 ETH_ALEN); 1270 /* 1271 * Now add the contents of the (re)association request, 1272 * but the "listen interval" and "current AP address" 1273 * (if applicable) are skipped. So we only have 1274 * the capability field (remember the position and fill 1275 * later), followed by the elements added below by 1276 * calling ieee80211_assoc_link_elems(). 1277 */ 1278 capab_pos = skb_put(skb, 2); 1279 1280 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1281 ext_capa, 1282 extra_elems, 1283 extra_elems_len, 1284 link_id, NULL, 1285 link_present_elems); 1286 if (extra_elems) 1287 skb_put_data(skb, extra_elems + extra_used, 1288 extra_elems_len - extra_used); 1289 1290 put_unaligned_le16(capab, capab_pos); 1291 1292 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1293 link_present_elems); 1294 1295 ieee80211_fragment_element(skb, subelem_len); 1296 } 1297 1298 ieee80211_fragment_element(skb, ml_elem_len); 1299 } 1300 1301 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1302 { 1303 struct ieee80211_local *local = sdata->local; 1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1305 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1306 struct ieee80211_link_data *link; 1307 struct sk_buff *skb; 1308 struct ieee80211_mgmt *mgmt; 1309 u8 *pos, qos_info, *ie_start; 1310 size_t offset, noffset; 1311 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1312 __le16 listen_int; 1313 struct element *ext_capa = NULL; 1314 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1315 struct ieee80211_prep_tx_info info = {}; 1316 unsigned int link_id, n_links = 0; 1317 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1318 void *capab_pos; 1319 size_t size; 1320 int ret; 1321 1322 /* we know it's writable, cast away the const */ 1323 if (assoc_data->ie_len) 1324 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1325 assoc_data->ie, 1326 assoc_data->ie_len); 1327 1328 sdata_assert_lock(sdata); 1329 1330 size = local->hw.extra_tx_headroom + 1331 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1332 2 + assoc_data->ssid_len + /* SSID */ 1333 assoc_data->ie_len + /* extra IEs */ 1334 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1335 9; /* WMM */ 1336 1337 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1338 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1339 const struct ieee80211_sband_iftype_data *iftd; 1340 struct ieee80211_supported_band *sband; 1341 1342 if (!cbss) 1343 continue; 1344 1345 sband = local->hw.wiphy->bands[cbss->channel->band]; 1346 1347 n_links++; 1348 /* add STA profile elements length */ 1349 size += assoc_data->link[link_id].elems_len; 1350 /* and supported rates length */ 1351 size += 4 + sband->n_bitrates; 1352 /* supported channels */ 1353 size += 2 + 2 * sband->n_channels; 1354 1355 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1356 if (iftd) 1357 size += iftd->vendor_elems.len; 1358 1359 /* power capability */ 1360 size += 4; 1361 1362 /* HT, VHT, HE, EHT */ 1363 size += 2 + sizeof(struct ieee80211_ht_cap); 1364 size += 2 + sizeof(struct ieee80211_vht_cap); 1365 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1366 sizeof(struct ieee80211_he_mcs_nss_supp) + 1367 IEEE80211_HE_PPE_THRES_MAX_LEN; 1368 1369 if (sband->band == NL80211_BAND_6GHZ) 1370 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1371 1372 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1373 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1374 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1375 1376 /* non-inheritance element */ 1377 size += 2 + 2 + PRESENT_ELEMS_MAX; 1378 1379 /* should be the same across all BSSes */ 1380 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1381 capab |= WLAN_CAPABILITY_PRIVACY; 1382 } 1383 1384 if (sdata->vif.valid_links) { 1385 /* consider the multi-link element with STA profile */ 1386 size += sizeof(struct ieee80211_multi_link_elem); 1387 /* max common info field in basic multi-link element */ 1388 size += sizeof(struct ieee80211_mle_basic_common_info) + 1389 2 + /* capa & op */ 1390 2; /* EML capa */ 1391 1392 /* 1393 * The capability elements were already considered above; 1394 * note this over-estimates a bit because there's no 1395 * STA profile for the assoc link. 1396 */ 1397 size += (n_links - 1) * 1398 (1 + 1 + /* subelement ID/length */ 1399 2 + /* STA control */ 1400 1 + ETH_ALEN + 2 /* STA Info field */); 1401 } 1402 1403 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1404 if (WARN_ON(!link)) 1405 return -EINVAL; 1406 1407 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1408 return -EINVAL; 1409 1410 skb = alloc_skb(size, GFP_KERNEL); 1411 if (!skb) 1412 return -ENOMEM; 1413 1414 skb_reserve(skb, local->hw.extra_tx_headroom); 1415 1416 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1417 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1418 1419 /* Set MBSSID support for HE AP if needed */ 1420 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1421 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1422 ext_capa && ext_capa->datalen >= 3) 1423 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1424 1425 mgmt = skb_put_zero(skb, 24); 1426 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1427 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1428 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1429 1430 listen_int = cpu_to_le16(assoc_data->s1g ? 1431 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1432 local->hw.conf.listen_interval); 1433 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1434 skb_put(skb, 10); 1435 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1436 IEEE80211_STYPE_REASSOC_REQ); 1437 capab_pos = &mgmt->u.reassoc_req.capab_info; 1438 mgmt->u.reassoc_req.listen_interval = listen_int; 1439 memcpy(mgmt->u.reassoc_req.current_ap, 1440 assoc_data->prev_ap_addr, ETH_ALEN); 1441 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1442 } else { 1443 skb_put(skb, 4); 1444 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1445 IEEE80211_STYPE_ASSOC_REQ); 1446 capab_pos = &mgmt->u.assoc_req.capab_info; 1447 mgmt->u.assoc_req.listen_interval = listen_int; 1448 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1449 } 1450 1451 /* SSID */ 1452 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1453 ie_start = pos; 1454 *pos++ = WLAN_EID_SSID; 1455 *pos++ = assoc_data->ssid_len; 1456 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1457 1458 /* add the elements for the assoc (main) link */ 1459 link_capab = capab; 1460 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1461 ext_capa, 1462 assoc_data->ie, 1463 assoc_data->ie_len, 1464 assoc_data->assoc_link_id, link, 1465 present_elems); 1466 put_unaligned_le16(link_capab, capab_pos); 1467 1468 /* if present, add any custom non-vendor IEs */ 1469 if (assoc_data->ie_len) { 1470 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1471 assoc_data->ie_len, 1472 offset); 1473 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1474 offset = noffset; 1475 } 1476 1477 if (assoc_data->wmm) { 1478 if (assoc_data->uapsd) { 1479 qos_info = ifmgd->uapsd_queues; 1480 qos_info |= (ifmgd->uapsd_max_sp_len << 1481 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1482 } else { 1483 qos_info = 0; 1484 } 1485 1486 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1487 } 1488 1489 /* add any remaining custom (i.e. vendor specific here) IEs */ 1490 if (assoc_data->ie_len) { 1491 noffset = assoc_data->ie_len; 1492 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1493 } 1494 1495 if (assoc_data->fils_kek_len) { 1496 ret = fils_encrypt_assoc_req(skb, assoc_data); 1497 if (ret < 0) { 1498 dev_kfree_skb(skb); 1499 return ret; 1500 } 1501 } 1502 1503 pos = skb_tail_pointer(skb); 1504 kfree(ifmgd->assoc_req_ies); 1505 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1506 if (!ifmgd->assoc_req_ies) { 1507 dev_kfree_skb(skb); 1508 return -ENOMEM; 1509 } 1510 1511 ifmgd->assoc_req_ies_len = pos - ie_start; 1512 1513 drv_mgd_prepare_tx(local, sdata, &info); 1514 1515 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1516 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1517 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1518 IEEE80211_TX_INTFL_MLME_CONN_TX; 1519 ieee80211_tx_skb(sdata, skb); 1520 1521 return 0; 1522 } 1523 1524 void ieee80211_send_pspoll(struct ieee80211_local *local, 1525 struct ieee80211_sub_if_data *sdata) 1526 { 1527 struct ieee80211_pspoll *pspoll; 1528 struct sk_buff *skb; 1529 1530 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1531 if (!skb) 1532 return; 1533 1534 pspoll = (struct ieee80211_pspoll *) skb->data; 1535 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1536 1537 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1538 ieee80211_tx_skb(sdata, skb); 1539 } 1540 1541 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1542 struct ieee80211_sub_if_data *sdata, 1543 bool powersave) 1544 { 1545 struct sk_buff *skb; 1546 struct ieee80211_hdr_3addr *nullfunc; 1547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1548 1549 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1550 !ieee80211_hw_check(&local->hw, 1551 DOESNT_SUPPORT_QOS_NDP)); 1552 if (!skb) 1553 return; 1554 1555 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1556 if (powersave) 1557 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1558 1559 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1560 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1561 1562 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1563 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1564 1565 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1566 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1567 1568 ieee80211_tx_skb(sdata, skb); 1569 } 1570 1571 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1572 struct ieee80211_sub_if_data *sdata) 1573 { 1574 struct sk_buff *skb; 1575 struct ieee80211_hdr *nullfunc; 1576 __le16 fc; 1577 1578 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1579 return; 1580 1581 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1582 if (!skb) 1583 return; 1584 1585 skb_reserve(skb, local->hw.extra_tx_headroom); 1586 1587 nullfunc = skb_put_zero(skb, 30); 1588 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1589 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1590 nullfunc->frame_control = fc; 1591 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1592 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1593 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1594 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1595 1596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1597 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1598 ieee80211_tx_skb(sdata, skb); 1599 } 1600 1601 /* spectrum management related things */ 1602 static void ieee80211_chswitch_work(struct work_struct *work) 1603 { 1604 struct ieee80211_link_data *link = 1605 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1606 struct ieee80211_sub_if_data *sdata = link->sdata; 1607 struct ieee80211_local *local = sdata->local; 1608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1609 int ret; 1610 1611 if (!ieee80211_sdata_running(sdata)) 1612 return; 1613 1614 sdata_lock(sdata); 1615 mutex_lock(&local->mtx); 1616 mutex_lock(&local->chanctx_mtx); 1617 1618 if (!ifmgd->associated) 1619 goto out; 1620 1621 if (!link->conf->csa_active) 1622 goto out; 1623 1624 /* 1625 * using reservation isn't immediate as it may be deferred until later 1626 * with multi-vif. once reservation is complete it will re-schedule the 1627 * work with no reserved_chanctx so verify chandef to check if it 1628 * completed successfully 1629 */ 1630 1631 if (link->reserved_chanctx) { 1632 /* 1633 * with multi-vif csa driver may call ieee80211_csa_finish() 1634 * many times while waiting for other interfaces to use their 1635 * reservations 1636 */ 1637 if (link->reserved_ready) 1638 goto out; 1639 1640 ret = ieee80211_link_use_reserved_context(link); 1641 if (ret) { 1642 sdata_info(sdata, 1643 "failed to use reserved channel context, disconnecting (err=%d)\n", 1644 ret); 1645 ieee80211_queue_work(&sdata->local->hw, 1646 &ifmgd->csa_connection_drop_work); 1647 goto out; 1648 } 1649 1650 goto out; 1651 } 1652 1653 if (!cfg80211_chandef_identical(&link->conf->chandef, 1654 &link->csa_chandef)) { 1655 sdata_info(sdata, 1656 "failed to finalize channel switch, disconnecting\n"); 1657 ieee80211_queue_work(&sdata->local->hw, 1658 &ifmgd->csa_connection_drop_work); 1659 goto out; 1660 } 1661 1662 link->u.mgd.csa_waiting_bcn = true; 1663 1664 ieee80211_sta_reset_beacon_monitor(sdata); 1665 ieee80211_sta_reset_conn_monitor(sdata); 1666 1667 out: 1668 mutex_unlock(&local->chanctx_mtx); 1669 mutex_unlock(&local->mtx); 1670 sdata_unlock(sdata); 1671 } 1672 1673 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1674 { 1675 struct ieee80211_sub_if_data *sdata = link->sdata; 1676 struct ieee80211_local *local = sdata->local; 1677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1678 int ret; 1679 1680 sdata_assert_lock(sdata); 1681 1682 WARN_ON(!link->conf->csa_active); 1683 1684 if (link->csa_block_tx) { 1685 ieee80211_wake_vif_queues(local, sdata, 1686 IEEE80211_QUEUE_STOP_REASON_CSA); 1687 link->csa_block_tx = false; 1688 } 1689 1690 link->conf->csa_active = false; 1691 link->u.mgd.csa_waiting_bcn = false; 1692 /* 1693 * If the CSA IE is still present on the beacon after the switch, 1694 * we need to consider it as a new CSA (possibly to self). 1695 */ 1696 link->u.mgd.beacon_crc_valid = false; 1697 1698 ret = drv_post_channel_switch(sdata); 1699 if (ret) { 1700 sdata_info(sdata, 1701 "driver post channel switch failed, disconnecting\n"); 1702 ieee80211_queue_work(&local->hw, 1703 &ifmgd->csa_connection_drop_work); 1704 return; 1705 } 1706 1707 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0); 1708 } 1709 1710 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1711 { 1712 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1714 1715 if (WARN_ON(sdata->vif.valid_links)) 1716 success = false; 1717 1718 trace_api_chswitch_done(sdata, success); 1719 if (!success) { 1720 sdata_info(sdata, 1721 "driver channel switch failed, disconnecting\n"); 1722 ieee80211_queue_work(&sdata->local->hw, 1723 &ifmgd->csa_connection_drop_work); 1724 } else { 1725 ieee80211_queue_work(&sdata->local->hw, 1726 &sdata->deflink.u.mgd.chswitch_work); 1727 } 1728 } 1729 EXPORT_SYMBOL(ieee80211_chswitch_done); 1730 1731 static void ieee80211_chswitch_timer(struct timer_list *t) 1732 { 1733 struct ieee80211_link_data *link = 1734 from_timer(link, t, u.mgd.chswitch_timer); 1735 1736 ieee80211_queue_work(&link->sdata->local->hw, 1737 &link->u.mgd.chswitch_work); 1738 } 1739 1740 static void 1741 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1742 { 1743 struct ieee80211_sub_if_data *sdata = link->sdata; 1744 struct ieee80211_local *local = sdata->local; 1745 1746 if (!local->ops->abort_channel_switch) 1747 return; 1748 1749 mutex_lock(&local->mtx); 1750 1751 mutex_lock(&local->chanctx_mtx); 1752 ieee80211_link_unreserve_chanctx(link); 1753 mutex_unlock(&local->chanctx_mtx); 1754 1755 if (link->csa_block_tx) 1756 ieee80211_wake_vif_queues(local, sdata, 1757 IEEE80211_QUEUE_STOP_REASON_CSA); 1758 1759 link->csa_block_tx = false; 1760 link->conf->csa_active = false; 1761 1762 mutex_unlock(&local->mtx); 1763 1764 drv_abort_channel_switch(sdata); 1765 } 1766 1767 static void 1768 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1769 u64 timestamp, u32 device_timestamp, 1770 struct ieee802_11_elems *elems, 1771 bool beacon) 1772 { 1773 struct ieee80211_sub_if_data *sdata = link->sdata; 1774 struct ieee80211_local *local = sdata->local; 1775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1776 struct cfg80211_bss *cbss = link->u.mgd.bss; 1777 struct ieee80211_chanctx_conf *conf; 1778 struct ieee80211_chanctx *chanctx; 1779 enum nl80211_band current_band; 1780 struct ieee80211_csa_ie csa_ie; 1781 struct ieee80211_channel_switch ch_switch; 1782 struct ieee80211_bss *bss; 1783 int res; 1784 1785 sdata_assert_lock(sdata); 1786 1787 if (!cbss) 1788 return; 1789 1790 if (local->scanning) 1791 return; 1792 1793 current_band = cbss->channel->band; 1794 bss = (void *)cbss->priv; 1795 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1796 bss->vht_cap_info, 1797 link->u.mgd.conn_flags, 1798 link->u.mgd.bssid, &csa_ie); 1799 1800 if (!res) { 1801 ch_switch.timestamp = timestamp; 1802 ch_switch.device_timestamp = device_timestamp; 1803 ch_switch.block_tx = csa_ie.mode; 1804 ch_switch.chandef = csa_ie.chandef; 1805 ch_switch.count = csa_ie.count; 1806 ch_switch.delay = csa_ie.max_switch_time; 1807 } 1808 1809 if (res < 0) 1810 goto lock_and_drop_connection; 1811 1812 if (beacon && link->conf->csa_active && 1813 !link->u.mgd.csa_waiting_bcn) { 1814 if (res) 1815 ieee80211_sta_abort_chanswitch(link); 1816 else 1817 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1818 return; 1819 } else if (link->conf->csa_active || res) { 1820 /* disregard subsequent announcements if already processing */ 1821 return; 1822 } 1823 1824 if (link->conf->chandef.chan->band != 1825 csa_ie.chandef.chan->band) { 1826 sdata_info(sdata, 1827 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1828 link->u.mgd.bssid, 1829 csa_ie.chandef.chan->center_freq, 1830 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1831 csa_ie.chandef.center_freq2); 1832 goto lock_and_drop_connection; 1833 } 1834 1835 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1836 IEEE80211_CHAN_DISABLED)) { 1837 sdata_info(sdata, 1838 "AP %pM switches to unsupported channel " 1839 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1840 "disconnecting\n", 1841 link->u.mgd.bssid, 1842 csa_ie.chandef.chan->center_freq, 1843 csa_ie.chandef.chan->freq_offset, 1844 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1845 csa_ie.chandef.freq1_offset, 1846 csa_ie.chandef.center_freq2); 1847 goto lock_and_drop_connection; 1848 } 1849 1850 if (cfg80211_chandef_identical(&csa_ie.chandef, 1851 &link->conf->chandef) && 1852 (!csa_ie.mode || !beacon)) { 1853 if (link->u.mgd.csa_ignored_same_chan) 1854 return; 1855 sdata_info(sdata, 1856 "AP %pM tries to chanswitch to same channel, ignore\n", 1857 link->u.mgd.bssid); 1858 link->u.mgd.csa_ignored_same_chan = true; 1859 return; 1860 } 1861 1862 /* 1863 * Drop all TDLS peers - either we disconnect or move to a different 1864 * channel from this point on. There's no telling what our peer will do. 1865 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1866 * have an incompatible wider chandef. 1867 */ 1868 ieee80211_teardown_tdls_peers(sdata); 1869 1870 mutex_lock(&local->mtx); 1871 mutex_lock(&local->chanctx_mtx); 1872 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1873 lockdep_is_held(&local->chanctx_mtx)); 1874 if (!conf) { 1875 sdata_info(sdata, 1876 "no channel context assigned to vif?, disconnecting\n"); 1877 goto drop_connection; 1878 } 1879 1880 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1881 1882 if (local->use_chanctx && 1883 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1884 sdata_info(sdata, 1885 "driver doesn't support chan-switch with channel contexts\n"); 1886 goto drop_connection; 1887 } 1888 1889 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1890 sdata_info(sdata, 1891 "preparing for channel switch failed, disconnecting\n"); 1892 goto drop_connection; 1893 } 1894 1895 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1896 chanctx->mode, false); 1897 if (res) { 1898 sdata_info(sdata, 1899 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1900 res); 1901 goto drop_connection; 1902 } 1903 mutex_unlock(&local->chanctx_mtx); 1904 1905 link->conf->csa_active = true; 1906 link->csa_chandef = csa_ie.chandef; 1907 link->csa_block_tx = csa_ie.mode; 1908 link->u.mgd.csa_ignored_same_chan = false; 1909 link->u.mgd.beacon_crc_valid = false; 1910 1911 if (link->csa_block_tx) 1912 ieee80211_stop_vif_queues(local, sdata, 1913 IEEE80211_QUEUE_STOP_REASON_CSA); 1914 mutex_unlock(&local->mtx); 1915 1916 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1917 csa_ie.count, csa_ie.mode); 1918 1919 if (local->ops->channel_switch) { 1920 /* use driver's channel switch callback */ 1921 drv_channel_switch(local, sdata, &ch_switch); 1922 return; 1923 } 1924 1925 /* channel switch handled in software */ 1926 if (csa_ie.count <= 1) 1927 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 1928 else 1929 mod_timer(&link->u.mgd.chswitch_timer, 1930 TU_TO_EXP_TIME((csa_ie.count - 1) * 1931 cbss->beacon_interval)); 1932 return; 1933 lock_and_drop_connection: 1934 mutex_lock(&local->mtx); 1935 mutex_lock(&local->chanctx_mtx); 1936 drop_connection: 1937 /* 1938 * This is just so that the disconnect flow will know that 1939 * we were trying to switch channel and failed. In case the 1940 * mode is 1 (we are not allowed to Tx), we will know not to 1941 * send a deauthentication frame. Those two fields will be 1942 * reset when the disconnection worker runs. 1943 */ 1944 link->conf->csa_active = true; 1945 link->csa_block_tx = csa_ie.mode; 1946 1947 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1948 mutex_unlock(&local->chanctx_mtx); 1949 mutex_unlock(&local->mtx); 1950 } 1951 1952 static bool 1953 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1954 struct ieee80211_channel *channel, 1955 const u8 *country_ie, u8 country_ie_len, 1956 const u8 *pwr_constr_elem, 1957 int *chan_pwr, int *pwr_reduction) 1958 { 1959 struct ieee80211_country_ie_triplet *triplet; 1960 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1961 int i, chan_increment; 1962 bool have_chan_pwr = false; 1963 1964 /* Invalid IE */ 1965 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1966 return false; 1967 1968 triplet = (void *)(country_ie + 3); 1969 country_ie_len -= 3; 1970 1971 switch (channel->band) { 1972 default: 1973 WARN_ON_ONCE(1); 1974 fallthrough; 1975 case NL80211_BAND_2GHZ: 1976 case NL80211_BAND_60GHZ: 1977 case NL80211_BAND_LC: 1978 chan_increment = 1; 1979 break; 1980 case NL80211_BAND_5GHZ: 1981 chan_increment = 4; 1982 break; 1983 case NL80211_BAND_6GHZ: 1984 /* 1985 * In the 6 GHz band, the "maximum transmit power level" 1986 * field in the triplets is reserved, and thus will be 1987 * zero and we shouldn't use it to control TX power. 1988 * The actual TX power will be given in the transmit 1989 * power envelope element instead. 1990 */ 1991 return false; 1992 } 1993 1994 /* find channel */ 1995 while (country_ie_len >= 3) { 1996 u8 first_channel = triplet->chans.first_channel; 1997 1998 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1999 goto next; 2000 2001 for (i = 0; i < triplet->chans.num_channels; i++) { 2002 if (first_channel + i * chan_increment == chan) { 2003 have_chan_pwr = true; 2004 *chan_pwr = triplet->chans.max_power; 2005 break; 2006 } 2007 } 2008 if (have_chan_pwr) 2009 break; 2010 2011 next: 2012 triplet++; 2013 country_ie_len -= 3; 2014 } 2015 2016 if (have_chan_pwr && pwr_constr_elem) 2017 *pwr_reduction = *pwr_constr_elem; 2018 else 2019 *pwr_reduction = 0; 2020 2021 return have_chan_pwr; 2022 } 2023 2024 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2025 struct ieee80211_channel *channel, 2026 const u8 *cisco_dtpc_ie, 2027 int *pwr_level) 2028 { 2029 /* From practical testing, the first data byte of the DTPC element 2030 * seems to contain the requested dBm level, and the CLI on Cisco 2031 * APs clearly state the range is -127 to 127 dBm, which indicates 2032 * a signed byte, although it seemingly never actually goes negative. 2033 * The other byte seems to always be zero. 2034 */ 2035 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2036 } 2037 2038 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2039 struct ieee80211_channel *channel, 2040 struct ieee80211_mgmt *mgmt, 2041 const u8 *country_ie, u8 country_ie_len, 2042 const u8 *pwr_constr_ie, 2043 const u8 *cisco_dtpc_ie) 2044 { 2045 struct ieee80211_sub_if_data *sdata = link->sdata; 2046 bool has_80211h_pwr = false, has_cisco_pwr = false; 2047 int chan_pwr = 0, pwr_reduction_80211h = 0; 2048 int pwr_level_cisco, pwr_level_80211h; 2049 int new_ap_level; 2050 __le16 capab = mgmt->u.probe_resp.capab_info; 2051 2052 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2053 return 0; /* TODO */ 2054 2055 if (country_ie && 2056 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2057 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2058 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2059 sdata, channel, country_ie, country_ie_len, 2060 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2061 pwr_level_80211h = 2062 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2063 } 2064 2065 if (cisco_dtpc_ie) { 2066 ieee80211_find_cisco_dtpc( 2067 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2068 has_cisco_pwr = true; 2069 } 2070 2071 if (!has_80211h_pwr && !has_cisco_pwr) 2072 return 0; 2073 2074 /* If we have both 802.11h and Cisco DTPC, apply both limits 2075 * by picking the smallest of the two power levels advertised. 2076 */ 2077 if (has_80211h_pwr && 2078 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2079 new_ap_level = pwr_level_80211h; 2080 2081 if (link->ap_power_level == new_ap_level) 2082 return 0; 2083 2084 sdata_dbg(sdata, 2085 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2086 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2087 link->u.mgd.bssid); 2088 } else { /* has_cisco_pwr is always true here. */ 2089 new_ap_level = pwr_level_cisco; 2090 2091 if (link->ap_power_level == new_ap_level) 2092 return 0; 2093 2094 sdata_dbg(sdata, 2095 "Limiting TX power to %d dBm as advertised by %pM\n", 2096 pwr_level_cisco, link->u.mgd.bssid); 2097 } 2098 2099 link->ap_power_level = new_ap_level; 2100 if (__ieee80211_recalc_txpower(sdata)) 2101 return BSS_CHANGED_TXPOWER; 2102 return 0; 2103 } 2104 2105 /* powersave */ 2106 static void ieee80211_enable_ps(struct ieee80211_local *local, 2107 struct ieee80211_sub_if_data *sdata) 2108 { 2109 struct ieee80211_conf *conf = &local->hw.conf; 2110 2111 /* 2112 * If we are scanning right now then the parameters will 2113 * take effect when scan finishes. 2114 */ 2115 if (local->scanning) 2116 return; 2117 2118 if (conf->dynamic_ps_timeout > 0 && 2119 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2120 mod_timer(&local->dynamic_ps_timer, jiffies + 2121 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2122 } else { 2123 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2124 ieee80211_send_nullfunc(local, sdata, true); 2125 2126 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2127 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2128 return; 2129 2130 conf->flags |= IEEE80211_CONF_PS; 2131 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2132 } 2133 } 2134 2135 static void ieee80211_change_ps(struct ieee80211_local *local) 2136 { 2137 struct ieee80211_conf *conf = &local->hw.conf; 2138 2139 if (local->ps_sdata) { 2140 ieee80211_enable_ps(local, local->ps_sdata); 2141 } else if (conf->flags & IEEE80211_CONF_PS) { 2142 conf->flags &= ~IEEE80211_CONF_PS; 2143 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2144 del_timer_sync(&local->dynamic_ps_timer); 2145 cancel_work_sync(&local->dynamic_ps_enable_work); 2146 } 2147 } 2148 2149 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2150 { 2151 struct ieee80211_local *local = sdata->local; 2152 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2153 struct sta_info *sta = NULL; 2154 bool authorized = false; 2155 2156 if (!mgd->powersave) 2157 return false; 2158 2159 if (mgd->broken_ap) 2160 return false; 2161 2162 if (!mgd->associated) 2163 return false; 2164 2165 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2166 return false; 2167 2168 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2169 !sdata->deflink.u.mgd.have_beacon) 2170 return false; 2171 2172 rcu_read_lock(); 2173 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2174 if (sta) 2175 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2176 rcu_read_unlock(); 2177 2178 return authorized; 2179 } 2180 2181 /* need to hold RTNL or interface lock */ 2182 void ieee80211_recalc_ps(struct ieee80211_local *local) 2183 { 2184 struct ieee80211_sub_if_data *sdata, *found = NULL; 2185 int count = 0; 2186 int timeout; 2187 2188 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2189 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2190 local->ps_sdata = NULL; 2191 return; 2192 } 2193 2194 list_for_each_entry(sdata, &local->interfaces, list) { 2195 if (!ieee80211_sdata_running(sdata)) 2196 continue; 2197 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2198 /* If an AP vif is found, then disable PS 2199 * by setting the count to zero thereby setting 2200 * ps_sdata to NULL. 2201 */ 2202 count = 0; 2203 break; 2204 } 2205 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2206 continue; 2207 found = sdata; 2208 count++; 2209 } 2210 2211 if (count == 1 && ieee80211_powersave_allowed(found)) { 2212 u8 dtimper = found->deflink.u.mgd.dtim_period; 2213 2214 timeout = local->dynamic_ps_forced_timeout; 2215 if (timeout < 0) 2216 timeout = 100; 2217 local->hw.conf.dynamic_ps_timeout = timeout; 2218 2219 /* If the TIM IE is invalid, pretend the value is 1 */ 2220 if (!dtimper) 2221 dtimper = 1; 2222 2223 local->hw.conf.ps_dtim_period = dtimper; 2224 local->ps_sdata = found; 2225 } else { 2226 local->ps_sdata = NULL; 2227 } 2228 2229 ieee80211_change_ps(local); 2230 } 2231 2232 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2233 { 2234 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2235 2236 if (sdata->vif.cfg.ps != ps_allowed) { 2237 sdata->vif.cfg.ps = ps_allowed; 2238 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2239 } 2240 } 2241 2242 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2243 { 2244 struct ieee80211_local *local = 2245 container_of(work, struct ieee80211_local, 2246 dynamic_ps_disable_work); 2247 2248 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2249 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2250 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2251 } 2252 2253 ieee80211_wake_queues_by_reason(&local->hw, 2254 IEEE80211_MAX_QUEUE_MAP, 2255 IEEE80211_QUEUE_STOP_REASON_PS, 2256 false); 2257 } 2258 2259 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2260 { 2261 struct ieee80211_local *local = 2262 container_of(work, struct ieee80211_local, 2263 dynamic_ps_enable_work); 2264 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2265 struct ieee80211_if_managed *ifmgd; 2266 unsigned long flags; 2267 int q; 2268 2269 /* can only happen when PS was just disabled anyway */ 2270 if (!sdata) 2271 return; 2272 2273 ifmgd = &sdata->u.mgd; 2274 2275 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2276 return; 2277 2278 if (local->hw.conf.dynamic_ps_timeout > 0) { 2279 /* don't enter PS if TX frames are pending */ 2280 if (drv_tx_frames_pending(local)) { 2281 mod_timer(&local->dynamic_ps_timer, jiffies + 2282 msecs_to_jiffies( 2283 local->hw.conf.dynamic_ps_timeout)); 2284 return; 2285 } 2286 2287 /* 2288 * transmission can be stopped by others which leads to 2289 * dynamic_ps_timer expiry. Postpone the ps timer if it 2290 * is not the actual idle state. 2291 */ 2292 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2293 for (q = 0; q < local->hw.queues; q++) { 2294 if (local->queue_stop_reasons[q]) { 2295 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2296 flags); 2297 mod_timer(&local->dynamic_ps_timer, jiffies + 2298 msecs_to_jiffies( 2299 local->hw.conf.dynamic_ps_timeout)); 2300 return; 2301 } 2302 } 2303 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2304 } 2305 2306 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2307 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2308 if (drv_tx_frames_pending(local)) { 2309 mod_timer(&local->dynamic_ps_timer, jiffies + 2310 msecs_to_jiffies( 2311 local->hw.conf.dynamic_ps_timeout)); 2312 } else { 2313 ieee80211_send_nullfunc(local, sdata, true); 2314 /* Flush to get the tx status of nullfunc frame */ 2315 ieee80211_flush_queues(local, sdata, false); 2316 } 2317 } 2318 2319 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2320 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2321 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2322 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2323 local->hw.conf.flags |= IEEE80211_CONF_PS; 2324 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2325 } 2326 } 2327 2328 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2329 { 2330 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2331 2332 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2333 } 2334 2335 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2336 { 2337 struct delayed_work *delayed_work = to_delayed_work(work); 2338 struct ieee80211_link_data *link = 2339 container_of(delayed_work, struct ieee80211_link_data, 2340 dfs_cac_timer_work); 2341 struct cfg80211_chan_def chandef = link->conf->chandef; 2342 struct ieee80211_sub_if_data *sdata = link->sdata; 2343 2344 mutex_lock(&sdata->local->mtx); 2345 if (sdata->wdev.cac_started) { 2346 ieee80211_link_release_channel(link); 2347 cfg80211_cac_event(sdata->dev, &chandef, 2348 NL80211_RADAR_CAC_FINISHED, 2349 GFP_KERNEL); 2350 } 2351 mutex_unlock(&sdata->local->mtx); 2352 } 2353 2354 static bool 2355 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2356 { 2357 struct ieee80211_local *local = sdata->local; 2358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2359 bool ret = false; 2360 int ac; 2361 2362 if (local->hw.queues < IEEE80211_NUM_ACS) 2363 return false; 2364 2365 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2366 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2367 int non_acm_ac; 2368 unsigned long now = jiffies; 2369 2370 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2371 tx_tspec->admitted_time && 2372 time_after(now, tx_tspec->time_slice_start + HZ)) { 2373 tx_tspec->consumed_tx_time = 0; 2374 tx_tspec->time_slice_start = now; 2375 2376 if (tx_tspec->downgraded) 2377 tx_tspec->action = 2378 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2379 } 2380 2381 switch (tx_tspec->action) { 2382 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2383 /* take the original parameters */ 2384 if (drv_conf_tx(local, &sdata->deflink, ac, 2385 &sdata->deflink.tx_conf[ac])) 2386 link_err(&sdata->deflink, 2387 "failed to set TX queue parameters for queue %d\n", 2388 ac); 2389 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2390 tx_tspec->downgraded = false; 2391 ret = true; 2392 break; 2393 case TX_TSPEC_ACTION_DOWNGRADE: 2394 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2395 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2396 ret = true; 2397 break; 2398 } 2399 /* downgrade next lower non-ACM AC */ 2400 for (non_acm_ac = ac + 1; 2401 non_acm_ac < IEEE80211_NUM_ACS; 2402 non_acm_ac++) 2403 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2404 break; 2405 /* Usually the loop will result in using BK even if it 2406 * requires admission control, but such a configuration 2407 * makes no sense and we have to transmit somehow - the 2408 * AC selection does the same thing. 2409 * If we started out trying to downgrade from BK, then 2410 * the extra condition here might be needed. 2411 */ 2412 if (non_acm_ac >= IEEE80211_NUM_ACS) 2413 non_acm_ac = IEEE80211_AC_BK; 2414 if (drv_conf_tx(local, &sdata->deflink, ac, 2415 &sdata->deflink.tx_conf[non_acm_ac])) 2416 link_err(&sdata->deflink, 2417 "failed to set TX queue parameters for queue %d\n", 2418 ac); 2419 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2420 ret = true; 2421 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2422 tx_tspec->time_slice_start + HZ - now + 1); 2423 break; 2424 case TX_TSPEC_ACTION_NONE: 2425 /* nothing now */ 2426 break; 2427 } 2428 } 2429 2430 return ret; 2431 } 2432 2433 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2434 { 2435 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2436 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2437 BSS_CHANGED_QOS); 2438 } 2439 2440 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2441 { 2442 struct ieee80211_sub_if_data *sdata; 2443 2444 sdata = container_of(work, struct ieee80211_sub_if_data, 2445 u.mgd.tx_tspec_wk.work); 2446 ieee80211_sta_handle_tspec_ac_params(sdata); 2447 } 2448 2449 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2450 { 2451 struct ieee80211_sub_if_data *sdata = link->sdata; 2452 struct ieee80211_local *local = sdata->local; 2453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2454 struct ieee80211_tx_queue_params *params = link->tx_conf; 2455 u8 ac; 2456 2457 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2458 mlme_dbg(sdata, 2459 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2460 ac, params[ac].acm, 2461 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2462 params[ac].txop, params[ac].uapsd, 2463 ifmgd->tx_tspec[ac].downgraded); 2464 if (!ifmgd->tx_tspec[ac].downgraded && 2465 drv_conf_tx(local, link, ac, ¶ms[ac])) 2466 link_err(link, 2467 "failed to set TX queue parameters for AC %d\n", 2468 ac); 2469 } 2470 } 2471 2472 /* MLME */ 2473 static bool 2474 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2475 struct ieee80211_link_data *link, 2476 const u8 *wmm_param, size_t wmm_param_len, 2477 const struct ieee80211_mu_edca_param_set *mu_edca) 2478 { 2479 struct ieee80211_sub_if_data *sdata = link->sdata; 2480 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2482 size_t left; 2483 int count, mu_edca_count, ac; 2484 const u8 *pos; 2485 u8 uapsd_queues = 0; 2486 2487 if (!local->ops->conf_tx) 2488 return false; 2489 2490 if (local->hw.queues < IEEE80211_NUM_ACS) 2491 return false; 2492 2493 if (!wmm_param) 2494 return false; 2495 2496 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2497 return false; 2498 2499 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2500 uapsd_queues = ifmgd->uapsd_queues; 2501 2502 count = wmm_param[6] & 0x0f; 2503 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2504 * if mu_edca was preset before and now it disappeared tell 2505 * the driver about it. 2506 */ 2507 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2508 if (count == link->u.mgd.wmm_last_param_set && 2509 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2510 return false; 2511 link->u.mgd.wmm_last_param_set = count; 2512 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2513 2514 pos = wmm_param + 8; 2515 left = wmm_param_len - 8; 2516 2517 memset(¶ms, 0, sizeof(params)); 2518 2519 sdata->wmm_acm = 0; 2520 for (; left >= 4; left -= 4, pos += 4) { 2521 int aci = (pos[0] >> 5) & 0x03; 2522 int acm = (pos[0] >> 4) & 0x01; 2523 bool uapsd = false; 2524 2525 switch (aci) { 2526 case 1: /* AC_BK */ 2527 ac = IEEE80211_AC_BK; 2528 if (acm) 2529 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2530 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2531 uapsd = true; 2532 params[ac].mu_edca = !!mu_edca; 2533 if (mu_edca) 2534 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2535 break; 2536 case 2: /* AC_VI */ 2537 ac = IEEE80211_AC_VI; 2538 if (acm) 2539 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2540 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2541 uapsd = true; 2542 params[ac].mu_edca = !!mu_edca; 2543 if (mu_edca) 2544 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2545 break; 2546 case 3: /* AC_VO */ 2547 ac = IEEE80211_AC_VO; 2548 if (acm) 2549 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2550 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2551 uapsd = true; 2552 params[ac].mu_edca = !!mu_edca; 2553 if (mu_edca) 2554 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2555 break; 2556 case 0: /* AC_BE */ 2557 default: 2558 ac = IEEE80211_AC_BE; 2559 if (acm) 2560 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2561 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2562 uapsd = true; 2563 params[ac].mu_edca = !!mu_edca; 2564 if (mu_edca) 2565 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2566 break; 2567 } 2568 2569 params[ac].aifs = pos[0] & 0x0f; 2570 2571 if (params[ac].aifs < 2) { 2572 sdata_info(sdata, 2573 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2574 params[ac].aifs, aci); 2575 params[ac].aifs = 2; 2576 } 2577 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2578 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2579 params[ac].txop = get_unaligned_le16(pos + 2); 2580 params[ac].acm = acm; 2581 params[ac].uapsd = uapsd; 2582 2583 if (params[ac].cw_min == 0 || 2584 params[ac].cw_min > params[ac].cw_max) { 2585 sdata_info(sdata, 2586 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2587 params[ac].cw_min, params[ac].cw_max, aci); 2588 return false; 2589 } 2590 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2591 } 2592 2593 /* WMM specification requires all 4 ACIs. */ 2594 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2595 if (params[ac].cw_min == 0) { 2596 sdata_info(sdata, 2597 "AP has invalid WMM params (missing AC %d), using defaults\n", 2598 ac); 2599 return false; 2600 } 2601 } 2602 2603 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2604 link->tx_conf[ac] = params[ac]; 2605 2606 ieee80211_mgd_set_link_qos_params(link); 2607 2608 /* enable WMM or activate new settings */ 2609 link->conf->qos = true; 2610 return true; 2611 } 2612 2613 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2614 { 2615 lockdep_assert_held(&sdata->local->mtx); 2616 2617 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2618 ieee80211_run_deferred_scan(sdata->local); 2619 } 2620 2621 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2622 { 2623 mutex_lock(&sdata->local->mtx); 2624 __ieee80211_stop_poll(sdata); 2625 mutex_unlock(&sdata->local->mtx); 2626 } 2627 2628 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2629 u16 capab, bool erp_valid, u8 erp) 2630 { 2631 struct ieee80211_bss_conf *bss_conf = link->conf; 2632 struct ieee80211_supported_band *sband; 2633 u32 changed = 0; 2634 bool use_protection; 2635 bool use_short_preamble; 2636 bool use_short_slot; 2637 2638 sband = ieee80211_get_link_sband(link); 2639 if (!sband) 2640 return changed; 2641 2642 if (erp_valid) { 2643 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2644 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2645 } else { 2646 use_protection = false; 2647 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2648 } 2649 2650 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2651 if (sband->band == NL80211_BAND_5GHZ || 2652 sband->band == NL80211_BAND_6GHZ) 2653 use_short_slot = true; 2654 2655 if (use_protection != bss_conf->use_cts_prot) { 2656 bss_conf->use_cts_prot = use_protection; 2657 changed |= BSS_CHANGED_ERP_CTS_PROT; 2658 } 2659 2660 if (use_short_preamble != bss_conf->use_short_preamble) { 2661 bss_conf->use_short_preamble = use_short_preamble; 2662 changed |= BSS_CHANGED_ERP_PREAMBLE; 2663 } 2664 2665 if (use_short_slot != bss_conf->use_short_slot) { 2666 bss_conf->use_short_slot = use_short_slot; 2667 changed |= BSS_CHANGED_ERP_SLOT; 2668 } 2669 2670 return changed; 2671 } 2672 2673 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2674 struct cfg80211_bss *cbss) 2675 { 2676 struct ieee80211_sub_if_data *sdata = link->sdata; 2677 struct ieee80211_bss_conf *bss_conf = link->conf; 2678 struct ieee80211_bss *bss = (void *)cbss->priv; 2679 u32 changed = BSS_CHANGED_QOS; 2680 2681 /* not really used in MLO */ 2682 sdata->u.mgd.beacon_timeout = 2683 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2684 bss_conf->beacon_int)); 2685 2686 changed |= ieee80211_handle_bss_capability(link, 2687 bss_conf->assoc_capability, 2688 bss->has_erp_value, 2689 bss->erp_value); 2690 2691 ieee80211_check_rate_mask(link); 2692 2693 link->u.mgd.bss = cbss; 2694 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2695 2696 if (sdata->vif.p2p || 2697 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2698 const struct cfg80211_bss_ies *ies; 2699 2700 rcu_read_lock(); 2701 ies = rcu_dereference(cbss->ies); 2702 if (ies) { 2703 int ret; 2704 2705 ret = cfg80211_get_p2p_attr( 2706 ies->data, ies->len, 2707 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2708 (u8 *) &bss_conf->p2p_noa_attr, 2709 sizeof(bss_conf->p2p_noa_attr)); 2710 if (ret >= 2) { 2711 link->u.mgd.p2p_noa_index = 2712 bss_conf->p2p_noa_attr.index; 2713 changed |= BSS_CHANGED_P2P_PS; 2714 } 2715 } 2716 rcu_read_unlock(); 2717 } 2718 2719 if (link->u.mgd.have_beacon) { 2720 /* 2721 * If the AP is buggy we may get here with no DTIM period 2722 * known, so assume it's 1 which is the only safe assumption 2723 * in that case, although if the TIM IE is broken powersave 2724 * probably just won't work at all. 2725 */ 2726 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1; 2727 bss_conf->beacon_rate = bss->beacon_rate; 2728 changed |= BSS_CHANGED_BEACON_INFO; 2729 } else { 2730 bss_conf->beacon_rate = NULL; 2731 bss_conf->dtim_period = 0; 2732 } 2733 2734 /* Tell the driver to monitor connection quality (if supported) */ 2735 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2736 bss_conf->cqm_rssi_thold) 2737 changed |= BSS_CHANGED_CQM; 2738 2739 return changed; 2740 } 2741 2742 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2743 struct ieee80211_mgd_assoc_data *assoc_data, 2744 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2745 { 2746 struct ieee80211_local *local = sdata->local; 2747 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2748 u64 vif_changed = BSS_CHANGED_ASSOC; 2749 unsigned int link_id; 2750 2751 sdata->u.mgd.associated = true; 2752 2753 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2754 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2755 struct ieee80211_link_data *link; 2756 2757 if (!cbss) 2758 continue; 2759 2760 link = sdata_dereference(sdata->link[link_id], sdata); 2761 if (WARN_ON(!link)) 2762 return; 2763 2764 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2765 } 2766 2767 /* just to be sure */ 2768 ieee80211_stop_poll(sdata); 2769 2770 ieee80211_led_assoc(local, 1); 2771 2772 vif_cfg->assoc = 1; 2773 2774 /* Enable ARP filtering */ 2775 if (vif_cfg->arp_addr_cnt) 2776 vif_changed |= BSS_CHANGED_ARP_FILTER; 2777 2778 if (sdata->vif.valid_links) { 2779 for (link_id = 0; 2780 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2781 link_id++) { 2782 struct ieee80211_link_data *link; 2783 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2784 2785 if (!cbss) 2786 continue; 2787 2788 link = sdata_dereference(sdata->link[link_id], sdata); 2789 if (WARN_ON(!link)) 2790 return; 2791 2792 ieee80211_link_info_change_notify(sdata, link, 2793 changed[link_id]); 2794 2795 ieee80211_recalc_smps(sdata, link); 2796 } 2797 2798 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2799 } else { 2800 ieee80211_bss_info_change_notify(sdata, 2801 vif_changed | changed[0]); 2802 } 2803 2804 mutex_lock(&local->iflist_mtx); 2805 ieee80211_recalc_ps(local); 2806 mutex_unlock(&local->iflist_mtx); 2807 2808 /* leave this here to not change ordering in non-MLO cases */ 2809 if (!sdata->vif.valid_links) 2810 ieee80211_recalc_smps(sdata, &sdata->deflink); 2811 ieee80211_recalc_ps_vif(sdata); 2812 2813 netif_carrier_on(sdata->dev); 2814 } 2815 2816 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2817 u16 stype, u16 reason, bool tx, 2818 u8 *frame_buf) 2819 { 2820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2821 struct ieee80211_local *local = sdata->local; 2822 unsigned int link_id; 2823 u32 changed = 0; 2824 struct ieee80211_prep_tx_info info = { 2825 .subtype = stype, 2826 }; 2827 2828 sdata_assert_lock(sdata); 2829 2830 if (WARN_ON_ONCE(tx && !frame_buf)) 2831 return; 2832 2833 if (WARN_ON(!ifmgd->associated)) 2834 return; 2835 2836 ieee80211_stop_poll(sdata); 2837 2838 ifmgd->associated = false; 2839 2840 /* other links will be destroyed */ 2841 sdata->deflink.u.mgd.bss = NULL; 2842 2843 netif_carrier_off(sdata->dev); 2844 2845 /* 2846 * if we want to get out of ps before disassoc (why?) we have 2847 * to do it before sending disassoc, as otherwise the null-packet 2848 * won't be valid. 2849 */ 2850 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2851 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2852 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2853 } 2854 local->ps_sdata = NULL; 2855 2856 /* disable per-vif ps */ 2857 ieee80211_recalc_ps_vif(sdata); 2858 2859 /* make sure ongoing transmission finishes */ 2860 synchronize_net(); 2861 2862 /* 2863 * drop any frame before deauth/disassoc, this can be data or 2864 * management frame. Since we are disconnecting, we should not 2865 * insist sending these frames which can take time and delay 2866 * the disconnection and possible the roaming. 2867 */ 2868 if (tx) 2869 ieee80211_flush_queues(local, sdata, true); 2870 2871 /* deauthenticate/disassociate now */ 2872 if (tx || frame_buf) { 2873 /* 2874 * In multi channel scenarios guarantee that the virtual 2875 * interface is granted immediate airtime to transmit the 2876 * deauthentication frame by calling mgd_prepare_tx, if the 2877 * driver requested so. 2878 */ 2879 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2880 !sdata->deflink.u.mgd.have_beacon) { 2881 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2882 } 2883 2884 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2885 sdata->vif.cfg.ap_addr, stype, 2886 reason, tx, frame_buf); 2887 } 2888 2889 /* flush out frame - make sure the deauth was actually sent */ 2890 if (tx) 2891 ieee80211_flush_queues(local, sdata, false); 2892 2893 drv_mgd_complete_tx(sdata->local, sdata, &info); 2894 2895 /* clear AP addr only after building the needed mgmt frames */ 2896 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2897 eth_zero_addr(sdata->vif.cfg.ap_addr); 2898 2899 sdata->vif.cfg.ssid_len = 0; 2900 2901 /* remove AP and TDLS peers */ 2902 sta_info_flush(sdata); 2903 2904 /* finally reset all BSS / config parameters */ 2905 if (!sdata->vif.valid_links) 2906 changed |= ieee80211_reset_erp_info(sdata); 2907 2908 ieee80211_led_assoc(local, 0); 2909 changed |= BSS_CHANGED_ASSOC; 2910 sdata->vif.cfg.assoc = false; 2911 2912 sdata->deflink.u.mgd.p2p_noa_index = -1; 2913 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2914 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2915 2916 /* on the next assoc, re-program HT/VHT parameters */ 2917 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2918 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2919 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2920 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2921 2922 /* 2923 * reset MU-MIMO ownership and group data in default link, 2924 * if used, other links are destroyed 2925 */ 2926 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2927 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2928 memset(sdata->vif.bss_conf.mu_group.position, 0, 2929 sizeof(sdata->vif.bss_conf.mu_group.position)); 2930 if (!sdata->vif.valid_links) 2931 changed |= BSS_CHANGED_MU_GROUPS; 2932 sdata->vif.bss_conf.mu_mimo_owner = false; 2933 2934 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2935 2936 del_timer_sync(&local->dynamic_ps_timer); 2937 cancel_work_sync(&local->dynamic_ps_enable_work); 2938 2939 /* Disable ARP filtering */ 2940 if (sdata->vif.cfg.arp_addr_cnt) 2941 changed |= BSS_CHANGED_ARP_FILTER; 2942 2943 sdata->vif.bss_conf.qos = false; 2944 if (!sdata->vif.valid_links) { 2945 changed |= BSS_CHANGED_QOS; 2946 /* The BSSID (not really interesting) and HT changed */ 2947 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2948 ieee80211_bss_info_change_notify(sdata, changed); 2949 } else { 2950 ieee80211_vif_cfg_change_notify(sdata, changed); 2951 } 2952 2953 /* disassociated - set to defaults now */ 2954 ieee80211_set_wmm_default(&sdata->deflink, false, false); 2955 2956 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2957 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2958 del_timer_sync(&sdata->u.mgd.timer); 2959 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 2960 2961 sdata->vif.bss_conf.dtim_period = 0; 2962 sdata->vif.bss_conf.beacon_rate = NULL; 2963 2964 sdata->deflink.u.mgd.have_beacon = false; 2965 sdata->deflink.u.mgd.tracking_signal_avg = false; 2966 sdata->deflink.u.mgd.disable_wmm_tracking = false; 2967 2968 ifmgd->flags = 0; 2969 sdata->deflink.u.mgd.conn_flags = 0; 2970 mutex_lock(&local->mtx); 2971 2972 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 2973 struct ieee80211_link_data *link; 2974 2975 link = sdata_dereference(sdata->link[link_id], sdata); 2976 if (!link) 2977 continue; 2978 ieee80211_link_release_channel(link); 2979 } 2980 2981 sdata->vif.bss_conf.csa_active = false; 2982 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2983 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 2984 if (sdata->deflink.csa_block_tx) { 2985 ieee80211_wake_vif_queues(local, sdata, 2986 IEEE80211_QUEUE_STOP_REASON_CSA); 2987 sdata->deflink.csa_block_tx = false; 2988 } 2989 mutex_unlock(&local->mtx); 2990 2991 /* existing TX TSPEC sessions no longer exist */ 2992 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2993 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2994 2995 sdata->vif.bss_conf.pwr_reduction = 0; 2996 sdata->vif.bss_conf.tx_pwr_env_num = 0; 2997 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 2998 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 2999 3000 ieee80211_vif_set_links(sdata, 0); 3001 } 3002 3003 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3004 { 3005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3006 struct ieee80211_local *local = sdata->local; 3007 3008 mutex_lock(&local->mtx); 3009 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3010 goto out; 3011 3012 __ieee80211_stop_poll(sdata); 3013 3014 mutex_lock(&local->iflist_mtx); 3015 ieee80211_recalc_ps(local); 3016 mutex_unlock(&local->iflist_mtx); 3017 3018 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3019 goto out; 3020 3021 /* 3022 * We've received a probe response, but are not sure whether 3023 * we have or will be receiving any beacons or data, so let's 3024 * schedule the timers again, just in case. 3025 */ 3026 ieee80211_sta_reset_beacon_monitor(sdata); 3027 3028 mod_timer(&ifmgd->conn_mon_timer, 3029 round_jiffies_up(jiffies + 3030 IEEE80211_CONNECTION_IDLE_TIME)); 3031 out: 3032 mutex_unlock(&local->mtx); 3033 } 3034 3035 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3036 struct ieee80211_hdr *hdr, 3037 u16 tx_time) 3038 { 3039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3040 u16 tid; 3041 int ac; 3042 struct ieee80211_sta_tx_tspec *tx_tspec; 3043 unsigned long now = jiffies; 3044 3045 if (!ieee80211_is_data_qos(hdr->frame_control)) 3046 return; 3047 3048 tid = ieee80211_get_tid(hdr); 3049 ac = ieee80211_ac_from_tid(tid); 3050 tx_tspec = &ifmgd->tx_tspec[ac]; 3051 3052 if (likely(!tx_tspec->admitted_time)) 3053 return; 3054 3055 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3056 tx_tspec->consumed_tx_time = 0; 3057 tx_tspec->time_slice_start = now; 3058 3059 if (tx_tspec->downgraded) { 3060 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3061 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3062 } 3063 } 3064 3065 if (tx_tspec->downgraded) 3066 return; 3067 3068 tx_tspec->consumed_tx_time += tx_time; 3069 3070 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3071 tx_tspec->downgraded = true; 3072 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3073 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3074 } 3075 } 3076 3077 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3078 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3079 { 3080 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3081 3082 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3083 !sdata->u.mgd.probe_send_count) 3084 return; 3085 3086 if (ack) 3087 sdata->u.mgd.probe_send_count = 0; 3088 else 3089 sdata->u.mgd.nullfunc_failed = true; 3090 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3091 } 3092 3093 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3094 const u8 *src, const u8 *dst, 3095 const u8 *ssid, size_t ssid_len, 3096 struct ieee80211_channel *channel) 3097 { 3098 struct sk_buff *skb; 3099 3100 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3101 ssid, ssid_len, NULL, 0, 3102 IEEE80211_PROBE_FLAG_DIRECTED); 3103 if (skb) 3104 ieee80211_tx_skb(sdata, skb); 3105 } 3106 3107 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3108 { 3109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3110 u8 *dst = sdata->vif.cfg.ap_addr; 3111 u8 unicast_limit = max(1, max_probe_tries - 3); 3112 struct sta_info *sta; 3113 3114 if (WARN_ON(sdata->vif.valid_links)) 3115 return; 3116 3117 /* 3118 * Try sending broadcast probe requests for the last three 3119 * probe requests after the first ones failed since some 3120 * buggy APs only support broadcast probe requests. 3121 */ 3122 if (ifmgd->probe_send_count >= unicast_limit) 3123 dst = NULL; 3124 3125 /* 3126 * When the hardware reports an accurate Tx ACK status, it's 3127 * better to send a nullfunc frame instead of a probe request, 3128 * as it will kick us off the AP quickly if we aren't associated 3129 * anymore. The timeout will be reset if the frame is ACKed by 3130 * the AP. 3131 */ 3132 ifmgd->probe_send_count++; 3133 3134 if (dst) { 3135 mutex_lock(&sdata->local->sta_mtx); 3136 sta = sta_info_get(sdata, dst); 3137 if (!WARN_ON(!sta)) 3138 ieee80211_check_fast_rx(sta); 3139 mutex_unlock(&sdata->local->sta_mtx); 3140 } 3141 3142 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3143 ifmgd->nullfunc_failed = false; 3144 ieee80211_send_nullfunc(sdata->local, sdata, false); 3145 } else { 3146 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3147 sdata->vif.cfg.ssid, 3148 sdata->vif.cfg.ssid_len, 3149 sdata->deflink.u.mgd.bss->channel); 3150 } 3151 3152 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3153 run_again(sdata, ifmgd->probe_timeout); 3154 } 3155 3156 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3157 bool beacon) 3158 { 3159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3160 bool already = false; 3161 3162 if (WARN_ON(sdata->vif.valid_links)) 3163 return; 3164 3165 if (!ieee80211_sdata_running(sdata)) 3166 return; 3167 3168 sdata_lock(sdata); 3169 3170 if (!ifmgd->associated) 3171 goto out; 3172 3173 mutex_lock(&sdata->local->mtx); 3174 3175 if (sdata->local->tmp_channel || sdata->local->scanning) { 3176 mutex_unlock(&sdata->local->mtx); 3177 goto out; 3178 } 3179 3180 if (sdata->local->suspending) { 3181 /* reschedule after resume */ 3182 mutex_unlock(&sdata->local->mtx); 3183 ieee80211_reset_ap_probe(sdata); 3184 goto out; 3185 } 3186 3187 if (beacon) { 3188 mlme_dbg_ratelimited(sdata, 3189 "detected beacon loss from AP (missed %d beacons) - probing\n", 3190 beacon_loss_count); 3191 3192 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3193 } 3194 3195 /* 3196 * The driver/our work has already reported this event or the 3197 * connection monitoring has kicked in and we have already sent 3198 * a probe request. Or maybe the AP died and the driver keeps 3199 * reporting until we disassociate... 3200 * 3201 * In either case we have to ignore the current call to this 3202 * function (except for setting the correct probe reason bit) 3203 * because otherwise we would reset the timer every time and 3204 * never check whether we received a probe response! 3205 */ 3206 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3207 already = true; 3208 3209 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3210 3211 mutex_unlock(&sdata->local->mtx); 3212 3213 if (already) 3214 goto out; 3215 3216 mutex_lock(&sdata->local->iflist_mtx); 3217 ieee80211_recalc_ps(sdata->local); 3218 mutex_unlock(&sdata->local->iflist_mtx); 3219 3220 ifmgd->probe_send_count = 0; 3221 ieee80211_mgd_probe_ap_send(sdata); 3222 out: 3223 sdata_unlock(sdata); 3224 } 3225 3226 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3227 struct ieee80211_vif *vif) 3228 { 3229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3231 struct cfg80211_bss *cbss; 3232 struct sk_buff *skb; 3233 const struct element *ssid; 3234 int ssid_len; 3235 3236 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3237 sdata->vif.valid_links)) 3238 return NULL; 3239 3240 sdata_assert_lock(sdata); 3241 3242 if (ifmgd->associated) 3243 cbss = sdata->deflink.u.mgd.bss; 3244 else if (ifmgd->auth_data) 3245 cbss = ifmgd->auth_data->bss; 3246 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3247 cbss = ifmgd->assoc_data->link[0].bss; 3248 else 3249 return NULL; 3250 3251 rcu_read_lock(); 3252 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3253 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3254 "invalid SSID element (len=%d)", 3255 ssid ? ssid->datalen : -1)) 3256 ssid_len = 0; 3257 else 3258 ssid_len = ssid->datalen; 3259 3260 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3261 (u32) -1, cbss->channel, 3262 ssid->data, ssid_len, 3263 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3264 rcu_read_unlock(); 3265 3266 return skb; 3267 } 3268 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3269 3270 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3271 const u8 *buf, size_t len, bool tx, 3272 u16 reason, bool reconnect) 3273 { 3274 struct ieee80211_event event = { 3275 .type = MLME_EVENT, 3276 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3277 .u.mlme.reason = reason, 3278 }; 3279 3280 if (tx) 3281 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3282 else 3283 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3284 3285 drv_event_callback(sdata->local, sdata, &event); 3286 } 3287 3288 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3289 { 3290 struct ieee80211_local *local = sdata->local; 3291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3292 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3293 bool tx; 3294 3295 sdata_lock(sdata); 3296 if (!ifmgd->associated) { 3297 sdata_unlock(sdata); 3298 return; 3299 } 3300 3301 /* in MLO assume we have a link where we can TX the frame */ 3302 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3303 3304 if (!ifmgd->driver_disconnect) { 3305 unsigned int link_id; 3306 3307 /* 3308 * AP is probably out of range (or not reachable for another 3309 * reason) so remove the bss structs for that AP. In the case 3310 * of multi-link, it's not clear that all of them really are 3311 * out of range, but if they weren't the driver likely would 3312 * have switched to just have a single link active? 3313 */ 3314 for (link_id = 0; 3315 link_id < ARRAY_SIZE(sdata->link); 3316 link_id++) { 3317 struct ieee80211_link_data *link; 3318 3319 link = sdata_dereference(sdata->link[link_id], sdata); 3320 if (!link) 3321 continue; 3322 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3323 link->u.mgd.bss = NULL; 3324 } 3325 } 3326 3327 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3328 ifmgd->driver_disconnect ? 3329 WLAN_REASON_DEAUTH_LEAVING : 3330 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3331 tx, frame_buf); 3332 mutex_lock(&local->mtx); 3333 /* the other links will be destroyed */ 3334 sdata->vif.bss_conf.csa_active = false; 3335 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3336 if (sdata->deflink.csa_block_tx) { 3337 ieee80211_wake_vif_queues(local, sdata, 3338 IEEE80211_QUEUE_STOP_REASON_CSA); 3339 sdata->deflink.csa_block_tx = false; 3340 } 3341 mutex_unlock(&local->mtx); 3342 3343 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3344 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3345 ifmgd->reconnect); 3346 ifmgd->reconnect = false; 3347 3348 sdata_unlock(sdata); 3349 } 3350 3351 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3352 { 3353 struct ieee80211_sub_if_data *sdata = 3354 container_of(work, struct ieee80211_sub_if_data, 3355 u.mgd.beacon_connection_loss_work); 3356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3357 3358 if (ifmgd->connection_loss) { 3359 sdata_info(sdata, "Connection to AP %pM lost\n", 3360 sdata->vif.cfg.ap_addr); 3361 __ieee80211_disconnect(sdata); 3362 ifmgd->connection_loss = false; 3363 } else if (ifmgd->driver_disconnect) { 3364 sdata_info(sdata, 3365 "Driver requested disconnection from AP %pM\n", 3366 sdata->vif.cfg.ap_addr); 3367 __ieee80211_disconnect(sdata); 3368 ifmgd->driver_disconnect = false; 3369 } else { 3370 if (ifmgd->associated) 3371 sdata->deflink.u.mgd.beacon_loss_count++; 3372 ieee80211_mgd_probe_ap(sdata, true); 3373 } 3374 } 3375 3376 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3377 { 3378 struct ieee80211_sub_if_data *sdata = 3379 container_of(work, struct ieee80211_sub_if_data, 3380 u.mgd.csa_connection_drop_work); 3381 3382 __ieee80211_disconnect(sdata); 3383 } 3384 3385 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3386 { 3387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3388 struct ieee80211_hw *hw = &sdata->local->hw; 3389 3390 trace_api_beacon_loss(sdata); 3391 3392 sdata->u.mgd.connection_loss = false; 3393 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3394 } 3395 EXPORT_SYMBOL(ieee80211_beacon_loss); 3396 3397 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3398 { 3399 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3400 struct ieee80211_hw *hw = &sdata->local->hw; 3401 3402 trace_api_connection_loss(sdata); 3403 3404 sdata->u.mgd.connection_loss = true; 3405 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3406 } 3407 EXPORT_SYMBOL(ieee80211_connection_loss); 3408 3409 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3410 { 3411 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3412 struct ieee80211_hw *hw = &sdata->local->hw; 3413 3414 trace_api_disconnect(sdata, reconnect); 3415 3416 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3417 return; 3418 3419 sdata->u.mgd.driver_disconnect = true; 3420 sdata->u.mgd.reconnect = reconnect; 3421 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3422 } 3423 EXPORT_SYMBOL(ieee80211_disconnect); 3424 3425 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3426 bool assoc) 3427 { 3428 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3429 3430 sdata_assert_lock(sdata); 3431 3432 if (!assoc) { 3433 /* 3434 * we are not authenticated yet, the only timer that could be 3435 * running is the timeout for the authentication response which 3436 * which is not relevant anymore. 3437 */ 3438 del_timer_sync(&sdata->u.mgd.timer); 3439 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3440 3441 /* other links are destroyed */ 3442 sdata->deflink.u.mgd.conn_flags = 0; 3443 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3444 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3445 BSS_CHANGED_BSSID); 3446 sdata->u.mgd.flags = 0; 3447 3448 mutex_lock(&sdata->local->mtx); 3449 ieee80211_link_release_channel(&sdata->deflink); 3450 ieee80211_vif_set_links(sdata, 0); 3451 mutex_unlock(&sdata->local->mtx); 3452 } 3453 3454 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3455 kfree(auth_data); 3456 sdata->u.mgd.auth_data = NULL; 3457 } 3458 3459 enum assoc_status { 3460 ASSOC_SUCCESS, 3461 ASSOC_REJECTED, 3462 ASSOC_TIMEOUT, 3463 ASSOC_ABANDON, 3464 }; 3465 3466 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3467 enum assoc_status status) 3468 { 3469 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3470 3471 sdata_assert_lock(sdata); 3472 3473 if (status != ASSOC_SUCCESS) { 3474 /* 3475 * we are not associated yet, the only timer that could be 3476 * running is the timeout for the association response which 3477 * which is not relevant anymore. 3478 */ 3479 del_timer_sync(&sdata->u.mgd.timer); 3480 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3481 3482 sdata->deflink.u.mgd.conn_flags = 0; 3483 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3484 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3485 BSS_CHANGED_BSSID); 3486 sdata->u.mgd.flags = 0; 3487 sdata->vif.bss_conf.mu_mimo_owner = false; 3488 3489 if (status != ASSOC_REJECTED) { 3490 struct cfg80211_assoc_failure data = { 3491 .timeout = status == ASSOC_TIMEOUT, 3492 }; 3493 int i; 3494 3495 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3496 ARRAY_SIZE(assoc_data->link)); 3497 3498 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3499 data.bss[i] = assoc_data->link[i].bss; 3500 3501 if (sdata->vif.valid_links) 3502 data.ap_mld_addr = assoc_data->ap_addr; 3503 3504 cfg80211_assoc_failure(sdata->dev, &data); 3505 } 3506 3507 mutex_lock(&sdata->local->mtx); 3508 ieee80211_link_release_channel(&sdata->deflink); 3509 ieee80211_vif_set_links(sdata, 0); 3510 mutex_unlock(&sdata->local->mtx); 3511 } 3512 3513 kfree(assoc_data); 3514 sdata->u.mgd.assoc_data = NULL; 3515 } 3516 3517 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3518 struct ieee80211_mgmt *mgmt, size_t len) 3519 { 3520 struct ieee80211_local *local = sdata->local; 3521 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3522 const struct element *challenge; 3523 u8 *pos; 3524 u32 tx_flags = 0; 3525 struct ieee80211_prep_tx_info info = { 3526 .subtype = IEEE80211_STYPE_AUTH, 3527 }; 3528 3529 pos = mgmt->u.auth.variable; 3530 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3531 len - (pos - (u8 *)mgmt)); 3532 if (!challenge) 3533 return; 3534 auth_data->expected_transaction = 4; 3535 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3536 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3537 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3538 IEEE80211_TX_INTFL_MLME_CONN_TX; 3539 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3540 (void *)challenge, 3541 challenge->datalen + sizeof(*challenge), 3542 auth_data->ap_addr, auth_data->ap_addr, 3543 auth_data->key, auth_data->key_len, 3544 auth_data->key_idx, tx_flags); 3545 } 3546 3547 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3548 { 3549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3550 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3551 struct sta_info *sta; 3552 bool result = true; 3553 3554 sdata_info(sdata, "authenticated\n"); 3555 ifmgd->auth_data->done = true; 3556 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3557 ifmgd->auth_data->timeout_started = true; 3558 run_again(sdata, ifmgd->auth_data->timeout); 3559 3560 /* move station state to auth */ 3561 mutex_lock(&sdata->local->sta_mtx); 3562 sta = sta_info_get(sdata, ap_addr); 3563 if (!sta) { 3564 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3565 result = false; 3566 goto out; 3567 } 3568 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3569 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3570 result = false; 3571 goto out; 3572 } 3573 3574 out: 3575 mutex_unlock(&sdata->local->sta_mtx); 3576 return result; 3577 } 3578 3579 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3580 struct ieee80211_mgmt *mgmt, size_t len) 3581 { 3582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3583 u16 auth_alg, auth_transaction, status_code; 3584 struct ieee80211_event event = { 3585 .type = MLME_EVENT, 3586 .u.mlme.data = AUTH_EVENT, 3587 }; 3588 struct ieee80211_prep_tx_info info = { 3589 .subtype = IEEE80211_STYPE_AUTH, 3590 }; 3591 3592 sdata_assert_lock(sdata); 3593 3594 if (len < 24 + 6) 3595 return; 3596 3597 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3598 return; 3599 3600 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3601 return; 3602 3603 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3604 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3605 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3606 3607 if (auth_alg != ifmgd->auth_data->algorithm || 3608 (auth_alg != WLAN_AUTH_SAE && 3609 auth_transaction != ifmgd->auth_data->expected_transaction) || 3610 (auth_alg == WLAN_AUTH_SAE && 3611 (auth_transaction < ifmgd->auth_data->expected_transaction || 3612 auth_transaction > 2))) { 3613 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3614 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3615 auth_transaction, 3616 ifmgd->auth_data->expected_transaction); 3617 goto notify_driver; 3618 } 3619 3620 if (status_code != WLAN_STATUS_SUCCESS) { 3621 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3622 3623 if (auth_alg == WLAN_AUTH_SAE && 3624 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3625 (auth_transaction == 1 && 3626 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3627 status_code == WLAN_STATUS_SAE_PK)))) { 3628 /* waiting for userspace now */ 3629 ifmgd->auth_data->waiting = true; 3630 ifmgd->auth_data->timeout = 3631 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3632 ifmgd->auth_data->timeout_started = true; 3633 run_again(sdata, ifmgd->auth_data->timeout); 3634 goto notify_driver; 3635 } 3636 3637 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3638 mgmt->sa, status_code); 3639 ieee80211_destroy_auth_data(sdata, false); 3640 event.u.mlme.status = MLME_DENIED; 3641 event.u.mlme.reason = status_code; 3642 drv_event_callback(sdata->local, sdata, &event); 3643 goto notify_driver; 3644 } 3645 3646 switch (ifmgd->auth_data->algorithm) { 3647 case WLAN_AUTH_OPEN: 3648 case WLAN_AUTH_LEAP: 3649 case WLAN_AUTH_FT: 3650 case WLAN_AUTH_SAE: 3651 case WLAN_AUTH_FILS_SK: 3652 case WLAN_AUTH_FILS_SK_PFS: 3653 case WLAN_AUTH_FILS_PK: 3654 break; 3655 case WLAN_AUTH_SHARED_KEY: 3656 if (ifmgd->auth_data->expected_transaction != 4) { 3657 ieee80211_auth_challenge(sdata, mgmt, len); 3658 /* need another frame */ 3659 return; 3660 } 3661 break; 3662 default: 3663 WARN_ONCE(1, "invalid auth alg %d", 3664 ifmgd->auth_data->algorithm); 3665 goto notify_driver; 3666 } 3667 3668 event.u.mlme.status = MLME_SUCCESS; 3669 info.success = 1; 3670 drv_event_callback(sdata->local, sdata, &event); 3671 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3672 (auth_transaction == 2 && 3673 ifmgd->auth_data->expected_transaction == 2)) { 3674 if (!ieee80211_mark_sta_auth(sdata)) 3675 return; /* ignore frame -- wait for timeout */ 3676 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3677 auth_transaction == 2) { 3678 sdata_info(sdata, "SAE peer confirmed\n"); 3679 ifmgd->auth_data->peer_confirmed = true; 3680 } 3681 3682 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3683 notify_driver: 3684 drv_mgd_complete_tx(sdata->local, sdata, &info); 3685 } 3686 3687 #define case_WLAN(type) \ 3688 case WLAN_REASON_##type: return #type 3689 3690 const char *ieee80211_get_reason_code_string(u16 reason_code) 3691 { 3692 switch (reason_code) { 3693 case_WLAN(UNSPECIFIED); 3694 case_WLAN(PREV_AUTH_NOT_VALID); 3695 case_WLAN(DEAUTH_LEAVING); 3696 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3697 case_WLAN(DISASSOC_AP_BUSY); 3698 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3699 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3700 case_WLAN(DISASSOC_STA_HAS_LEFT); 3701 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3702 case_WLAN(DISASSOC_BAD_POWER); 3703 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3704 case_WLAN(INVALID_IE); 3705 case_WLAN(MIC_FAILURE); 3706 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3707 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3708 case_WLAN(IE_DIFFERENT); 3709 case_WLAN(INVALID_GROUP_CIPHER); 3710 case_WLAN(INVALID_PAIRWISE_CIPHER); 3711 case_WLAN(INVALID_AKMP); 3712 case_WLAN(UNSUPP_RSN_VERSION); 3713 case_WLAN(INVALID_RSN_IE_CAP); 3714 case_WLAN(IEEE8021X_FAILED); 3715 case_WLAN(CIPHER_SUITE_REJECTED); 3716 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3717 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3718 case_WLAN(DISASSOC_LOW_ACK); 3719 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3720 case_WLAN(QSTA_LEAVE_QBSS); 3721 case_WLAN(QSTA_NOT_USE); 3722 case_WLAN(QSTA_REQUIRE_SETUP); 3723 case_WLAN(QSTA_TIMEOUT); 3724 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3725 case_WLAN(MESH_PEER_CANCELED); 3726 case_WLAN(MESH_MAX_PEERS); 3727 case_WLAN(MESH_CONFIG); 3728 case_WLAN(MESH_CLOSE); 3729 case_WLAN(MESH_MAX_RETRIES); 3730 case_WLAN(MESH_CONFIRM_TIMEOUT); 3731 case_WLAN(MESH_INVALID_GTK); 3732 case_WLAN(MESH_INCONSISTENT_PARAM); 3733 case_WLAN(MESH_INVALID_SECURITY); 3734 case_WLAN(MESH_PATH_ERROR); 3735 case_WLAN(MESH_PATH_NOFORWARD); 3736 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3737 case_WLAN(MAC_EXISTS_IN_MBSS); 3738 case_WLAN(MESH_CHAN_REGULATORY); 3739 case_WLAN(MESH_CHAN); 3740 default: return "<unknown>"; 3741 } 3742 } 3743 3744 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3745 struct ieee80211_mgmt *mgmt, size_t len) 3746 { 3747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3748 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3749 3750 sdata_assert_lock(sdata); 3751 3752 if (len < 24 + 2) 3753 return; 3754 3755 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3756 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3757 return; 3758 } 3759 3760 if (ifmgd->associated && 3761 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3762 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3763 sdata->vif.cfg.ap_addr, reason_code, 3764 ieee80211_get_reason_code_string(reason_code)); 3765 3766 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3767 3768 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3769 reason_code, false); 3770 return; 3771 } 3772 3773 if (ifmgd->assoc_data && 3774 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3775 sdata_info(sdata, 3776 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3777 ifmgd->assoc_data->ap_addr, reason_code, 3778 ieee80211_get_reason_code_string(reason_code)); 3779 3780 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3781 3782 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3783 return; 3784 } 3785 } 3786 3787 3788 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3789 struct ieee80211_mgmt *mgmt, size_t len) 3790 { 3791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3792 u16 reason_code; 3793 3794 sdata_assert_lock(sdata); 3795 3796 if (len < 24 + 2) 3797 return; 3798 3799 if (!ifmgd->associated || 3800 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3801 return; 3802 3803 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3804 3805 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3806 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3807 return; 3808 } 3809 3810 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3811 sdata->vif.cfg.ap_addr, reason_code, 3812 ieee80211_get_reason_code_string(reason_code)); 3813 3814 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3815 3816 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3817 false); 3818 } 3819 3820 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3821 u8 *supp_rates, unsigned int supp_rates_len, 3822 u32 *rates, u32 *basic_rates, 3823 bool *have_higher_than_11mbit, 3824 int *min_rate, int *min_rate_index, 3825 int shift) 3826 { 3827 int i, j; 3828 3829 for (i = 0; i < supp_rates_len; i++) { 3830 int rate = supp_rates[i] & 0x7f; 3831 bool is_basic = !!(supp_rates[i] & 0x80); 3832 3833 if ((rate * 5 * (1 << shift)) > 110) 3834 *have_higher_than_11mbit = true; 3835 3836 /* 3837 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3838 * since they're not rates. 3839 * 3840 * Note: Even though the membership selector and the basic 3841 * rate flag share the same bit, they are not exactly 3842 * the same. 3843 */ 3844 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3845 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3846 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3847 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3848 continue; 3849 3850 for (j = 0; j < sband->n_bitrates; j++) { 3851 struct ieee80211_rate *br; 3852 int brate; 3853 3854 br = &sband->bitrates[j]; 3855 3856 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3857 if (brate == rate) { 3858 *rates |= BIT(j); 3859 if (is_basic) 3860 *basic_rates |= BIT(j); 3861 if ((rate * 5) < *min_rate) { 3862 *min_rate = rate * 5; 3863 *min_rate_index = j; 3864 } 3865 break; 3866 } 3867 } 3868 } 3869 } 3870 3871 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta, 3872 const struct ieee802_11_elems *elems) 3873 { 3874 if (elems->ext_capab_len < 10) 3875 return false; 3876 3877 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3878 return false; 3879 3880 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3881 IEEE80211_HE_MAC_CAP0_TWT_RES; 3882 } 3883 3884 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link, 3885 struct link_sta_info *link_sta, 3886 struct ieee802_11_elems *elems) 3887 { 3888 bool twt = ieee80211_twt_req_supported(link_sta, elems); 3889 3890 if (link->conf->twt_requester != twt) { 3891 link->conf->twt_requester = twt; 3892 return BSS_CHANGED_TWT; 3893 } 3894 return 0; 3895 } 3896 3897 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3898 struct ieee80211_bss_conf *bss_conf, 3899 struct ieee80211_supported_band *sband, 3900 struct link_sta_info *link_sta) 3901 { 3902 const struct ieee80211_sta_he_cap *own_he_cap = 3903 ieee80211_get_he_iftype_cap(sband, 3904 ieee80211_vif_type_p2p(&sdata->vif)); 3905 3906 return bss_conf->he_support && 3907 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3908 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3909 own_he_cap && 3910 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3911 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3912 } 3913 3914 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3915 struct link_sta_info *link_sta, 3916 struct cfg80211_bss *cbss, 3917 struct ieee80211_mgmt *mgmt, 3918 const u8 *elem_start, 3919 unsigned int elem_len, 3920 u64 *changed) 3921 { 3922 struct ieee80211_sub_if_data *sdata = link->sdata; 3923 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3924 struct ieee80211_bss_conf *bss_conf = link->conf; 3925 struct ieee80211_local *local = sdata->local; 3926 struct ieee80211_elems_parse_params parse_params = { 3927 .start = elem_start, 3928 .len = elem_len, 3929 .bss = cbss, 3930 .link_id = link == &sdata->deflink ? -1 : link->link_id, 3931 .from_ap = true, 3932 }; 3933 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3934 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3935 const struct cfg80211_bss_ies *bss_ies = NULL; 3936 struct ieee80211_supported_band *sband; 3937 struct ieee802_11_elems *elems; 3938 u16 capab_info; 3939 bool ret; 3940 3941 elems = ieee802_11_parse_elems_full(&parse_params); 3942 if (!elems) 3943 return false; 3944 3945 /* FIXME: use from STA profile element after parsing that */ 3946 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3947 3948 if (!is_s1g && !elems->supp_rates) { 3949 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3950 ret = false; 3951 goto out; 3952 } 3953 3954 link->u.mgd.tdls_chan_switch_prohibited = 3955 elems->ext_capab && elems->ext_capab_len >= 5 && 3956 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3957 3958 /* 3959 * Some APs are erroneously not including some information in their 3960 * (re)association response frames. Try to recover by using the data 3961 * from the beacon or probe response. This seems to afflict mobile 3962 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3963 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3964 */ 3965 if (!is_6ghz && 3966 ((assoc_data->wmm && !elems->wmm_param) || 3967 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 3968 (!elems->ht_cap_elem || !elems->ht_operation)) || 3969 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 3970 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3971 const struct cfg80211_bss_ies *ies; 3972 struct ieee802_11_elems *bss_elems; 3973 3974 rcu_read_lock(); 3975 ies = rcu_dereference(cbss->ies); 3976 if (ies) 3977 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3978 GFP_ATOMIC); 3979 rcu_read_unlock(); 3980 if (!bss_ies) { 3981 ret = false; 3982 goto out; 3983 } 3984 3985 parse_params.start = bss_ies->data; 3986 parse_params.len = bss_ies->len; 3987 bss_elems = ieee802_11_parse_elems_full(&parse_params); 3988 if (!bss_elems) { 3989 ret = false; 3990 goto out; 3991 } 3992 3993 if (assoc_data->wmm && 3994 !elems->wmm_param && bss_elems->wmm_param) { 3995 elems->wmm_param = bss_elems->wmm_param; 3996 sdata_info(sdata, 3997 "AP bug: WMM param missing from AssocResp\n"); 3998 } 3999 4000 /* 4001 * Also check if we requested HT/VHT, otherwise the AP doesn't 4002 * have to include the IEs in the (re)association response. 4003 */ 4004 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4005 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4006 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4007 sdata_info(sdata, 4008 "AP bug: HT capability missing from AssocResp\n"); 4009 } 4010 if (!elems->ht_operation && bss_elems->ht_operation && 4011 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4012 elems->ht_operation = bss_elems->ht_operation; 4013 sdata_info(sdata, 4014 "AP bug: HT operation missing from AssocResp\n"); 4015 } 4016 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4017 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4018 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4019 sdata_info(sdata, 4020 "AP bug: VHT capa missing from AssocResp\n"); 4021 } 4022 if (!elems->vht_operation && bss_elems->vht_operation && 4023 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4024 elems->vht_operation = bss_elems->vht_operation; 4025 sdata_info(sdata, 4026 "AP bug: VHT operation missing from AssocResp\n"); 4027 } 4028 4029 kfree(bss_elems); 4030 } 4031 4032 /* 4033 * We previously checked these in the beacon/probe response, so 4034 * they should be present here. This is just a safety net. 4035 */ 4036 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4037 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4038 sdata_info(sdata, 4039 "HT AP is missing WMM params or HT capability/operation\n"); 4040 ret = false; 4041 goto out; 4042 } 4043 4044 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4045 (!elems->vht_cap_elem || !elems->vht_operation)) { 4046 sdata_info(sdata, 4047 "VHT AP is missing VHT capability/operation\n"); 4048 ret = false; 4049 goto out; 4050 } 4051 4052 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4053 !elems->he_6ghz_capa) { 4054 sdata_info(sdata, 4055 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4056 ret = false; 4057 goto out; 4058 } 4059 4060 if (WARN_ON(!link->conf->chandef.chan)) { 4061 ret = false; 4062 goto out; 4063 } 4064 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4065 4066 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4067 (!elems->he_cap || !elems->he_operation)) { 4068 sdata_info(sdata, 4069 "HE AP is missing HE capability/operation\n"); 4070 ret = false; 4071 goto out; 4072 } 4073 4074 /* Set up internal HT/VHT capabilities */ 4075 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4076 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4077 elems->ht_cap_elem, 4078 link_sta); 4079 4080 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4081 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4082 elems->vht_cap_elem, 4083 link_sta); 4084 4085 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4086 elems->he_cap) { 4087 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4088 elems->he_cap, 4089 elems->he_cap_len, 4090 elems->he_6ghz_capa, 4091 link_sta); 4092 4093 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4094 if (elems->rsnx && elems->rsnx_len && 4095 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4096 wiphy_ext_feature_isset(local->hw.wiphy, 4097 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4098 bss_conf->twt_protected = true; 4099 else 4100 bss_conf->twt_protected = false; 4101 4102 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 4103 4104 if (elems->eht_operation && elems->eht_cap && 4105 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4106 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4107 elems->he_cap, 4108 elems->he_cap_len, 4109 elems->eht_cap, 4110 elems->eht_cap_len, 4111 link_sta); 4112 4113 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4114 } else { 4115 bss_conf->eht_support = false; 4116 } 4117 } else { 4118 bss_conf->he_support = false; 4119 bss_conf->twt_requester = false; 4120 bss_conf->twt_protected = false; 4121 bss_conf->eht_support = false; 4122 } 4123 4124 bss_conf->twt_broadcast = 4125 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4126 4127 if (bss_conf->he_support) { 4128 bss_conf->he_bss_color.color = 4129 le32_get_bits(elems->he_operation->he_oper_params, 4130 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4131 bss_conf->he_bss_color.partial = 4132 le32_get_bits(elems->he_operation->he_oper_params, 4133 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4134 bss_conf->he_bss_color.enabled = 4135 !le32_get_bits(elems->he_operation->he_oper_params, 4136 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4137 4138 if (bss_conf->he_bss_color.enabled) 4139 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4140 4141 bss_conf->htc_trig_based_pkt_ext = 4142 le32_get_bits(elems->he_operation->he_oper_params, 4143 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4144 bss_conf->frame_time_rts_th = 4145 le32_get_bits(elems->he_operation->he_oper_params, 4146 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4147 4148 bss_conf->uora_exists = !!elems->uora_element; 4149 if (elems->uora_element) 4150 bss_conf->uora_ocw_range = elems->uora_element[0]; 4151 4152 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4153 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4154 /* TODO: OPEN: what happens if BSS color disable is set? */ 4155 } 4156 4157 if (cbss->transmitted_bss) { 4158 bss_conf->nontransmitted = true; 4159 ether_addr_copy(bss_conf->transmitter_bssid, 4160 cbss->transmitted_bss->bssid); 4161 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4162 bss_conf->bssid_index = cbss->bssid_index; 4163 } 4164 4165 /* 4166 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4167 * in their association response, so ignore that data for our own 4168 * configuration. If it changed since the last beacon, we'll get the 4169 * next beacon and update then. 4170 */ 4171 4172 /* 4173 * If an operating mode notification IE is present, override the 4174 * NSS calculation (that would be done in rate_control_rate_init()) 4175 * and use the # of streams from that element. 4176 */ 4177 if (elems->opmode_notif && 4178 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4179 u8 nss; 4180 4181 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4182 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4183 nss += 1; 4184 link_sta->pub->rx_nss = nss; 4185 } 4186 4187 /* 4188 * Always handle WMM once after association regardless 4189 * of the first value the AP uses. Setting -1 here has 4190 * that effect because the AP values is an unsigned 4191 * 4-bit value. 4192 */ 4193 link->u.mgd.wmm_last_param_set = -1; 4194 link->u.mgd.mu_edca_last_param_set = -1; 4195 4196 if (link->u.mgd.disable_wmm_tracking) { 4197 ieee80211_set_wmm_default(link, false, false); 4198 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4199 elems->wmm_param_len, 4200 elems->mu_edca_param_set)) { 4201 /* still enable QoS since we might have HT/VHT */ 4202 ieee80211_set_wmm_default(link, false, true); 4203 /* disable WMM tracking in this case to disable 4204 * tracking WMM parameter changes in the beacon if 4205 * the parameters weren't actually valid. Doing so 4206 * avoids changing parameters very strangely when 4207 * the AP is going back and forth between valid and 4208 * invalid parameters. 4209 */ 4210 link->u.mgd.disable_wmm_tracking = true; 4211 } 4212 4213 if (elems->max_idle_period_ie) { 4214 bss_conf->max_idle_period = 4215 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4216 bss_conf->protected_keep_alive = 4217 !!(elems->max_idle_period_ie->idle_options & 4218 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4219 *changed |= BSS_CHANGED_KEEP_ALIVE; 4220 } else { 4221 bss_conf->max_idle_period = 0; 4222 bss_conf->protected_keep_alive = false; 4223 } 4224 4225 /* set assoc capability (AID was already set earlier), 4226 * ieee80211_set_associated() will tell the driver */ 4227 bss_conf->assoc_capability = capab_info; 4228 4229 ret = true; 4230 out: 4231 kfree(elems); 4232 kfree(bss_ies); 4233 return ret; 4234 } 4235 4236 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4237 struct sta_info *sta, 4238 struct link_sta_info *link_sta, 4239 struct cfg80211_bss *cbss) 4240 { 4241 struct ieee80211_sub_if_data *sdata = link->sdata; 4242 struct ieee80211_local *local = sdata->local; 4243 struct ieee80211_bss *bss = (void *)cbss->priv; 4244 u32 rates = 0, basic_rates = 0; 4245 bool have_higher_than_11mbit = false; 4246 int min_rate = INT_MAX, min_rate_index = -1; 4247 /* this is clearly wrong for MLO but we'll just remove it later */ 4248 int shift = ieee80211_vif_get_shift(&sdata->vif); 4249 struct ieee80211_supported_band *sband; 4250 4251 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4252 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4253 4254 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4255 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4256 ieee80211_s1g_sta_rate_init(sta); 4257 return 0; 4258 } 4259 4260 sband = local->hw.wiphy->bands[cbss->channel->band]; 4261 4262 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4263 &rates, &basic_rates, &have_higher_than_11mbit, 4264 &min_rate, &min_rate_index, shift); 4265 4266 /* 4267 * This used to be a workaround for basic rates missing 4268 * in the association response frame. Now that we no 4269 * longer use the basic rates from there, it probably 4270 * doesn't happen any more, but keep the workaround so 4271 * in case some *other* APs are buggy in different ways 4272 * we can connect -- with a warning. 4273 * Allow this workaround only in case the AP provided at least 4274 * one rate. 4275 */ 4276 if (min_rate_index < 0) { 4277 link_info(link, "No legacy rates in association response\n"); 4278 return -EINVAL; 4279 } else if (!basic_rates) { 4280 link_info(link, "No basic rates, using min rate instead\n"); 4281 basic_rates = BIT(min_rate_index); 4282 } 4283 4284 if (rates) 4285 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4286 else 4287 link_info(link, "No rates found, keeping mandatory only\n"); 4288 4289 link->conf->basic_rates = basic_rates; 4290 4291 /* cf. IEEE 802.11 9.2.12 */ 4292 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4293 have_higher_than_11mbit; 4294 4295 return 0; 4296 } 4297 4298 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4299 struct cfg80211_bss *cbss) 4300 { 4301 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4302 const struct element *ht_cap_elem, *vht_cap_elem; 4303 const struct cfg80211_bss_ies *ies; 4304 const struct ieee80211_ht_cap *ht_cap; 4305 const struct ieee80211_vht_cap *vht_cap; 4306 const struct ieee80211_he_cap_elem *he_cap; 4307 const struct element *he_cap_elem; 4308 u16 mcs_80_map, mcs_160_map; 4309 int i, mcs_nss_size; 4310 bool support_160; 4311 u8 chains = 1; 4312 4313 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4314 return chains; 4315 4316 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4317 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4318 ht_cap = (void *)ht_cap_elem->data; 4319 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4320 /* 4321 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4322 * "Tx Unequal Modulation Supported" fields. 4323 */ 4324 } 4325 4326 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4327 return chains; 4328 4329 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4330 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4331 u8 nss; 4332 u16 tx_mcs_map; 4333 4334 vht_cap = (void *)vht_cap_elem->data; 4335 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4336 for (nss = 8; nss > 0; nss--) { 4337 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4338 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4339 break; 4340 } 4341 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4342 chains = max(chains, nss); 4343 } 4344 4345 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4346 return chains; 4347 4348 ies = rcu_dereference(cbss->ies); 4349 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4350 ies->data, ies->len); 4351 4352 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4353 return chains; 4354 4355 /* skip one byte ext_tag_id */ 4356 he_cap = (void *)(he_cap_elem->data + 1); 4357 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4358 4359 /* invalid HE IE */ 4360 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4361 return chains; 4362 4363 /* mcs_nss is right after he_cap info */ 4364 he_mcs_nss_supp = (void *)(he_cap + 1); 4365 4366 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4367 4368 for (i = 7; i >= 0; i--) { 4369 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4370 4371 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4372 chains = max_t(u8, chains, i + 1); 4373 break; 4374 } 4375 } 4376 4377 support_160 = he_cap->phy_cap_info[0] & 4378 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4379 4380 if (!support_160) 4381 return chains; 4382 4383 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4384 for (i = 7; i >= 0; i--) { 4385 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4386 4387 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4388 chains = max_t(u8, chains, i + 1); 4389 break; 4390 } 4391 } 4392 4393 return chains; 4394 } 4395 4396 static bool 4397 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4398 const struct cfg80211_bss_ies *ies, 4399 const struct ieee80211_he_operation *he_op) 4400 { 4401 const struct element *he_cap_elem; 4402 const struct ieee80211_he_cap_elem *he_cap; 4403 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4404 u16 mcs_80_map_tx, mcs_80_map_rx; 4405 u16 ap_min_req_set; 4406 int mcs_nss_size; 4407 int nss; 4408 4409 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4410 ies->data, ies->len); 4411 4412 /* invalid HE IE */ 4413 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4414 sdata_info(sdata, 4415 "Invalid HE elem, Disable HE\n"); 4416 return false; 4417 } 4418 4419 /* skip one byte ext_tag_id */ 4420 he_cap = (void *)(he_cap_elem->data + 1); 4421 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4422 4423 /* invalid HE IE */ 4424 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4425 sdata_info(sdata, 4426 "Invalid HE elem with nss size, Disable HE\n"); 4427 return false; 4428 } 4429 4430 /* mcs_nss is right after he_cap info */ 4431 he_mcs_nss_supp = (void *)(he_cap + 1); 4432 4433 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4434 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4435 4436 /* P802.11-REVme/D0.3 4437 * 27.1.1 Introduction to the HE PHY 4438 * ... 4439 * An HE STA shall support the following features: 4440 * ... 4441 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4442 * supported channel widths for HE SU PPDUs 4443 */ 4444 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4445 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4446 sdata_info(sdata, 4447 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4448 mcs_80_map_tx, mcs_80_map_rx); 4449 return false; 4450 } 4451 4452 if (!he_op) 4453 return true; 4454 4455 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4456 4457 /* 4458 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4459 * zeroes, which is nonsense, and completely inconsistent with itself 4460 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4461 */ 4462 if (!ap_min_req_set) 4463 return true; 4464 4465 /* make sure the AP is consistent with itself 4466 * 4467 * P802.11-REVme/D0.3 4468 * 26.17.1 Basic HE BSS operation 4469 * 4470 * A STA that is operating in an HE BSS shall be able to receive and 4471 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4472 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4473 * MLME-START.request primitive and shall be able to receive at each of 4474 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4475 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4476 * primitive 4477 */ 4478 for (nss = 8; nss > 0; nss--) { 4479 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4480 u8 ap_rx_val; 4481 u8 ap_tx_val; 4482 4483 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4484 continue; 4485 4486 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4487 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4488 4489 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4490 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4491 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4492 sdata_info(sdata, 4493 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4494 nss, ap_rx_val, ap_rx_val, ap_op_val); 4495 return false; 4496 } 4497 } 4498 4499 return true; 4500 } 4501 4502 static bool 4503 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4504 struct ieee80211_supported_band *sband, 4505 const struct ieee80211_he_operation *he_op) 4506 { 4507 const struct ieee80211_sta_he_cap *sta_he_cap = 4508 ieee80211_get_he_iftype_cap(sband, 4509 ieee80211_vif_type_p2p(&sdata->vif)); 4510 u16 ap_min_req_set; 4511 int i; 4512 4513 if (!sta_he_cap || !he_op) 4514 return false; 4515 4516 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4517 4518 /* 4519 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4520 * zeroes, which is nonsense, and completely inconsistent with itself 4521 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4522 */ 4523 if (!ap_min_req_set) 4524 return true; 4525 4526 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4527 for (i = 0; i < 3; i++) { 4528 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4529 &sta_he_cap->he_mcs_nss_supp; 4530 u16 sta_mcs_map_rx = 4531 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4532 u16 sta_mcs_map_tx = 4533 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4534 u8 nss; 4535 bool verified = true; 4536 4537 /* 4538 * For each band there is a maximum of 8 spatial streams 4539 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4540 * of 2 bits per NSS (1-8), with the values defined in enum 4541 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4542 * capabilities aren't less than the AP's minimum requirements 4543 * for this HE BSS per SS. 4544 * It is enough to find one such band that meets the reqs. 4545 */ 4546 for (nss = 8; nss > 0; nss--) { 4547 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4548 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4549 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4550 4551 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4552 continue; 4553 4554 /* 4555 * Make sure the HE AP doesn't require MCSs that aren't 4556 * supported by the client as required by spec 4557 * 4558 * P802.11-REVme/D0.3 4559 * 26.17.1 Basic HE BSS operation 4560 * 4561 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4562 * a BSS, unless it supports (i.e., is able to both transmit and 4563 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4564 * HE-MCS and NSS set. 4565 */ 4566 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4567 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4568 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4569 verified = false; 4570 break; 4571 } 4572 } 4573 4574 if (verified) 4575 return true; 4576 } 4577 4578 /* If here, STA doesn't meet AP's HE min requirements */ 4579 return false; 4580 } 4581 4582 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4583 struct ieee80211_link_data *link, 4584 struct cfg80211_bss *cbss, 4585 ieee80211_conn_flags_t *conn_flags) 4586 { 4587 struct ieee80211_local *local = sdata->local; 4588 const struct ieee80211_ht_cap *ht_cap = NULL; 4589 const struct ieee80211_ht_operation *ht_oper = NULL; 4590 const struct ieee80211_vht_operation *vht_oper = NULL; 4591 const struct ieee80211_he_operation *he_oper = NULL; 4592 const struct ieee80211_eht_operation *eht_oper = NULL; 4593 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4594 struct ieee80211_supported_band *sband; 4595 struct cfg80211_chan_def chandef; 4596 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4597 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4598 struct ieee80211_bss *bss = (void *)cbss->priv; 4599 struct ieee80211_elems_parse_params parse_params = { 4600 .bss = cbss, 4601 .link_id = -1, 4602 .from_ap = true, 4603 }; 4604 struct ieee802_11_elems *elems; 4605 const struct cfg80211_bss_ies *ies; 4606 int ret; 4607 u32 i; 4608 bool have_80mhz; 4609 4610 rcu_read_lock(); 4611 4612 ies = rcu_dereference(cbss->ies); 4613 parse_params.start = ies->data; 4614 parse_params.len = ies->len; 4615 elems = ieee802_11_parse_elems_full(&parse_params); 4616 if (!elems) { 4617 rcu_read_unlock(); 4618 return -ENOMEM; 4619 } 4620 4621 sband = local->hw.wiphy->bands[cbss->channel->band]; 4622 4623 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4624 IEEE80211_CONN_DISABLE_80P80MHZ | 4625 IEEE80211_CONN_DISABLE_160MHZ); 4626 4627 /* disable HT/VHT/HE if we don't support them */ 4628 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4629 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4630 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4631 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4632 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4633 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4634 } 4635 4636 if (!sband->vht_cap.vht_supported && is_5ghz) { 4637 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4638 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4639 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4640 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4641 } 4642 4643 if (!ieee80211_get_he_iftype_cap(sband, 4644 ieee80211_vif_type_p2p(&sdata->vif))) { 4645 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4646 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4647 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4648 } 4649 4650 if (!ieee80211_get_eht_iftype_cap(sband, 4651 ieee80211_vif_type_p2p(&sdata->vif))) { 4652 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4653 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4654 } 4655 4656 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4657 ht_oper = elems->ht_operation; 4658 ht_cap = elems->ht_cap_elem; 4659 4660 if (!ht_cap) { 4661 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4662 ht_oper = NULL; 4663 } 4664 } 4665 4666 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4667 vht_oper = elems->vht_operation; 4668 if (vht_oper && !ht_oper) { 4669 vht_oper = NULL; 4670 sdata_info(sdata, 4671 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4672 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4673 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4674 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4675 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4676 } 4677 4678 if (!elems->vht_cap_elem) { 4679 sdata_info(sdata, 4680 "bad VHT capabilities, disabling VHT\n"); 4681 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4682 vht_oper = NULL; 4683 } 4684 } 4685 4686 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4687 he_oper = elems->he_operation; 4688 4689 if (link && is_6ghz) { 4690 struct ieee80211_bss_conf *bss_conf; 4691 u8 j = 0; 4692 4693 bss_conf = link->conf; 4694 4695 if (elems->pwr_constr_elem) 4696 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4697 4698 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4699 ARRAY_SIZE(elems->tx_pwr_env)); 4700 4701 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4702 if (elems->tx_pwr_env_len[i] > 4703 sizeof(bss_conf->tx_pwr_env[j])) 4704 continue; 4705 4706 bss_conf->tx_pwr_env_num++; 4707 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4708 elems->tx_pwr_env_len[i]); 4709 j++; 4710 } 4711 } 4712 4713 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4714 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4715 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4716 IEEE80211_CONN_DISABLE_EHT; 4717 } 4718 4719 /* 4720 * EHT requires HE to be supported as well. Specifically for 6 GHz 4721 * channels, the operation channel information can only be deduced from 4722 * both the 6 GHz operation information (from the HE operation IE) and 4723 * EHT operation. 4724 */ 4725 if (!(*conn_flags & 4726 (IEEE80211_CONN_DISABLE_HE | 4727 IEEE80211_CONN_DISABLE_EHT)) && 4728 he_oper) { 4729 const struct cfg80211_bss_ies *cbss_ies; 4730 const u8 *eht_oper_ie; 4731 4732 cbss_ies = rcu_dereference(cbss->ies); 4733 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4734 cbss_ies->data, cbss_ies->len); 4735 if (eht_oper_ie && eht_oper_ie[1] >= 4736 1 + sizeof(struct ieee80211_eht_operation)) 4737 eht_oper = (void *)(eht_oper_ie + 3); 4738 else 4739 eht_oper = NULL; 4740 } 4741 4742 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4743 have_80mhz = false; 4744 for (i = 0; i < sband->n_channels; i++) { 4745 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4746 IEEE80211_CHAN_NO_80MHZ)) 4747 continue; 4748 4749 have_80mhz = true; 4750 break; 4751 } 4752 4753 if (!have_80mhz) { 4754 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4755 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4756 } 4757 4758 if (sband->band == NL80211_BAND_S1GHZ) { 4759 s1g_oper = elems->s1g_oper; 4760 if (!s1g_oper) 4761 sdata_info(sdata, 4762 "AP missing S1G operation element?\n"); 4763 } 4764 4765 *conn_flags |= 4766 ieee80211_determine_chantype(sdata, link, *conn_flags, 4767 sband, 4768 cbss->channel, 4769 bss->vht_cap_info, 4770 ht_oper, vht_oper, 4771 he_oper, eht_oper, 4772 s1g_oper, 4773 &chandef, false); 4774 4775 if (link) 4776 link->needed_rx_chains = 4777 min(ieee80211_max_rx_chains(link, cbss), 4778 local->rx_chains); 4779 4780 rcu_read_unlock(); 4781 /* the element data was RCU protected so no longer valid anyway */ 4782 kfree(elems); 4783 elems = NULL; 4784 4785 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4786 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4787 return -EINVAL; 4788 } 4789 4790 if (!link) 4791 return 0; 4792 4793 /* will change later if needed */ 4794 link->smps_mode = IEEE80211_SMPS_OFF; 4795 4796 mutex_lock(&local->mtx); 4797 /* 4798 * If this fails (possibly due to channel context sharing 4799 * on incompatible channels, e.g. 80+80 and 160 sharing the 4800 * same control channel) try to use a smaller bandwidth. 4801 */ 4802 ret = ieee80211_link_use_channel(link, &chandef, 4803 IEEE80211_CHANCTX_SHARED); 4804 4805 /* don't downgrade for 5 and 10 MHz channels, though. */ 4806 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4807 chandef.width == NL80211_CHAN_WIDTH_10) 4808 goto out; 4809 4810 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4811 *conn_flags |= 4812 ieee80211_chandef_downgrade(&chandef); 4813 ret = ieee80211_link_use_channel(link, &chandef, 4814 IEEE80211_CHANCTX_SHARED); 4815 } 4816 out: 4817 mutex_unlock(&local->mtx); 4818 return ret; 4819 } 4820 4821 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4822 u8 *dtim_count, u8 *dtim_period) 4823 { 4824 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4825 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4826 ies->len); 4827 const struct ieee80211_tim_ie *tim = NULL; 4828 const struct ieee80211_bssid_index *idx; 4829 bool valid = tim_ie && tim_ie[1] >= 2; 4830 4831 if (valid) 4832 tim = (void *)(tim_ie + 2); 4833 4834 if (dtim_count) 4835 *dtim_count = valid ? tim->dtim_count : 0; 4836 4837 if (dtim_period) 4838 *dtim_period = valid ? tim->dtim_period : 0; 4839 4840 /* Check if value is overridden by non-transmitted profile */ 4841 if (!idx_ie || idx_ie[1] < 3) 4842 return valid; 4843 4844 idx = (void *)(idx_ie + 2); 4845 4846 if (dtim_count) 4847 *dtim_count = idx->dtim_count; 4848 4849 if (dtim_period) 4850 *dtim_period = idx->dtim_period; 4851 4852 return true; 4853 } 4854 4855 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4856 struct ieee80211_mgmt *mgmt, 4857 struct ieee802_11_elems *elems, 4858 const u8 *elem_start, unsigned int elem_len) 4859 { 4860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4861 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4862 struct ieee80211_local *local = sdata->local; 4863 unsigned int link_id; 4864 struct sta_info *sta; 4865 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4866 int err; 4867 4868 mutex_lock(&sdata->local->sta_mtx); 4869 /* 4870 * station info was already allocated and inserted before 4871 * the association and should be available to us 4872 */ 4873 sta = sta_info_get(sdata, assoc_data->ap_addr); 4874 if (WARN_ON(!sta)) 4875 goto out_err; 4876 4877 if (sdata->vif.valid_links) { 4878 u16 valid_links = 0; 4879 4880 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4881 if (!assoc_data->link[link_id].bss) 4882 continue; 4883 valid_links |= BIT(link_id); 4884 4885 if (link_id != assoc_data->assoc_link_id) { 4886 err = ieee80211_sta_allocate_link(sta, link_id); 4887 if (err) 4888 goto out_err; 4889 } 4890 } 4891 4892 ieee80211_vif_set_links(sdata, valid_links); 4893 } 4894 4895 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4896 struct ieee80211_link_data *link; 4897 struct link_sta_info *link_sta; 4898 4899 if (!assoc_data->link[link_id].bss) 4900 continue; 4901 4902 link = sdata_dereference(sdata->link[link_id], sdata); 4903 if (WARN_ON(!link)) 4904 goto out_err; 4905 4906 if (sdata->vif.valid_links) 4907 link_info(link, 4908 "local address %pM, AP link address %pM\n", 4909 link->conf->addr, 4910 assoc_data->link[link_id].bss->bssid); 4911 4912 link_sta = rcu_dereference_protected(sta->link[link_id], 4913 lockdep_is_held(&local->sta_mtx)); 4914 if (WARN_ON(!link_sta)) 4915 goto out_err; 4916 4917 if (link_id != assoc_data->assoc_link_id) { 4918 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4919 const struct cfg80211_bss_ies *ies; 4920 4921 rcu_read_lock(); 4922 ies = rcu_dereference(cbss->ies); 4923 ieee80211_get_dtim(ies, 4924 &link->conf->sync_dtim_count, 4925 &link->u.mgd.dtim_period); 4926 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 4927 link->conf->beacon_int = cbss->beacon_interval; 4928 rcu_read_unlock(); 4929 4930 err = ieee80211_prep_channel(sdata, link, cbss, 4931 &link->u.mgd.conn_flags); 4932 if (err) { 4933 link_info(link, "prep_channel failed\n"); 4934 goto out_err; 4935 } 4936 } 4937 4938 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 4939 assoc_data->link[link_id].bss); 4940 if (err) 4941 goto out_err; 4942 4943 if (!ieee80211_assoc_config_link(link, link_sta, 4944 assoc_data->link[link_id].bss, 4945 mgmt, elem_start, elem_len, 4946 &changed[link_id])) 4947 goto out_err; 4948 4949 if (link_id != assoc_data->assoc_link_id) { 4950 err = ieee80211_sta_activate_link(sta, link_id); 4951 if (err) 4952 goto out_err; 4953 } 4954 } 4955 4956 rate_control_rate_init(sta); 4957 4958 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 4959 set_sta_flag(sta, WLAN_STA_MFP); 4960 sta->sta.mfp = true; 4961 } else { 4962 sta->sta.mfp = false; 4963 } 4964 4965 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 4966 elems->ext_capab_len); 4967 4968 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 4969 local->hw.queues >= IEEE80211_NUM_ACS; 4970 4971 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 4972 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 4973 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 4974 if (err) { 4975 sdata_info(sdata, 4976 "failed to move station %pM to desired state\n", 4977 sta->sta.addr); 4978 WARN_ON(__sta_info_destroy(sta)); 4979 goto out_err; 4980 } 4981 4982 if (sdata->wdev.use_4addr) 4983 drv_sta_set_4addr(local, sdata, &sta->sta, true); 4984 4985 mutex_unlock(&sdata->local->sta_mtx); 4986 4987 ieee80211_set_associated(sdata, assoc_data, changed); 4988 4989 /* 4990 * If we're using 4-addr mode, let the AP know that we're 4991 * doing so, so that it can create the STA VLAN on its side 4992 */ 4993 if (ifmgd->use_4addr) 4994 ieee80211_send_4addr_nullfunc(local, sdata); 4995 4996 /* 4997 * Start timer to probe the connection to the AP now. 4998 * Also start the timer that will detect beacon loss. 4999 */ 5000 ieee80211_sta_reset_beacon_monitor(sdata); 5001 ieee80211_sta_reset_conn_monitor(sdata); 5002 5003 return true; 5004 out_err: 5005 eth_zero_addr(sdata->vif.cfg.ap_addr); 5006 mutex_unlock(&sdata->local->sta_mtx); 5007 return false; 5008 } 5009 5010 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5011 struct ieee80211_mgmt *mgmt, 5012 size_t len) 5013 { 5014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5015 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5016 u16 capab_info, status_code, aid; 5017 struct ieee80211_elems_parse_params parse_params = { 5018 .bss = NULL, 5019 .link_id = -1, 5020 .from_ap = true, 5021 }; 5022 struct ieee802_11_elems *elems; 5023 int ac; 5024 const u8 *elem_start; 5025 unsigned int elem_len; 5026 bool reassoc; 5027 struct ieee80211_event event = { 5028 .type = MLME_EVENT, 5029 .u.mlme.data = ASSOC_EVENT, 5030 }; 5031 struct ieee80211_prep_tx_info info = {}; 5032 struct cfg80211_rx_assoc_resp resp = { 5033 .uapsd_queues = -1, 5034 }; 5035 unsigned int link_id; 5036 5037 sdata_assert_lock(sdata); 5038 5039 if (!assoc_data) 5040 return; 5041 5042 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5043 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5044 return; 5045 5046 /* 5047 * AssocResp and ReassocResp have identical structure, so process both 5048 * of them in this function. 5049 */ 5050 5051 if (len < 24 + 6) 5052 return; 5053 5054 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5055 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5056 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5057 if (assoc_data->s1g) 5058 elem_start = mgmt->u.s1g_assoc_resp.variable; 5059 else 5060 elem_start = mgmt->u.assoc_resp.variable; 5061 5062 /* 5063 * Note: this may not be perfect, AP might misbehave - if 5064 * anyone needs to rely on perfect complete notification 5065 * with the exact right subtype, then we need to track what 5066 * we actually transmitted. 5067 */ 5068 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5069 IEEE80211_STYPE_ASSOC_REQ; 5070 5071 if (assoc_data->fils_kek_len && 5072 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5073 return; 5074 5075 elem_len = len - (elem_start - (u8 *)mgmt); 5076 parse_params.start = elem_start; 5077 parse_params.len = elem_len; 5078 elems = ieee802_11_parse_elems_full(&parse_params); 5079 if (!elems) 5080 goto notify_driver; 5081 5082 if (elems->aid_resp) 5083 aid = le16_to_cpu(elems->aid_resp->aid); 5084 else if (assoc_data->s1g) 5085 aid = 0; /* TODO */ 5086 else 5087 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5088 5089 /* 5090 * The 5 MSB of the AID field are reserved 5091 * (802.11-2016 9.4.1.8 AID field) 5092 */ 5093 aid &= 0x7ff; 5094 5095 sdata_info(sdata, 5096 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5097 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5098 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5099 5100 ifmgd->broken_ap = false; 5101 5102 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5103 elems->timeout_int && 5104 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5105 u32 tu, ms; 5106 5107 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5108 le32_to_cpu(elems->timeout_int->value)); 5109 5110 tu = le32_to_cpu(elems->timeout_int->value); 5111 ms = tu * 1024 / 1000; 5112 sdata_info(sdata, 5113 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5114 assoc_data->ap_addr, tu, ms); 5115 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5116 assoc_data->timeout_started = true; 5117 if (ms > IEEE80211_ASSOC_TIMEOUT) 5118 run_again(sdata, assoc_data->timeout); 5119 goto notify_driver; 5120 } 5121 5122 if (status_code != WLAN_STATUS_SUCCESS) { 5123 sdata_info(sdata, "%pM denied association (code=%d)\n", 5124 assoc_data->ap_addr, status_code); 5125 event.u.mlme.status = MLME_DENIED; 5126 event.u.mlme.reason = status_code; 5127 drv_event_callback(sdata->local, sdata, &event); 5128 } else { 5129 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5130 sdata_info(sdata, 5131 "invalid AID value %d (out of range), turn off PS\n", 5132 aid); 5133 aid = 0; 5134 ifmgd->broken_ap = true; 5135 } 5136 5137 if (sdata->vif.valid_links) { 5138 if (!elems->multi_link) { 5139 sdata_info(sdata, 5140 "MLO association with %pM but no multi-link element in response!\n", 5141 assoc_data->ap_addr); 5142 goto abandon_assoc; 5143 } 5144 5145 if (le16_get_bits(elems->multi_link->control, 5146 IEEE80211_ML_CONTROL_TYPE) != 5147 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5148 sdata_info(sdata, 5149 "bad multi-link element (control=0x%x)\n", 5150 le16_to_cpu(elems->multi_link->control)); 5151 goto abandon_assoc; 5152 } else { 5153 struct ieee80211_mle_basic_common_info *common; 5154 5155 common = (void *)elems->multi_link->variable; 5156 5157 if (memcmp(assoc_data->ap_addr, 5158 common->mld_mac_addr, ETH_ALEN)) { 5159 sdata_info(sdata, 5160 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5161 common->mld_mac_addr, 5162 assoc_data->ap_addr); 5163 goto abandon_assoc; 5164 } 5165 } 5166 } 5167 5168 sdata->vif.cfg.aid = aid; 5169 5170 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5171 elem_start, elem_len)) { 5172 /* oops -- internal error -- send timeout for now */ 5173 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5174 goto notify_driver; 5175 } 5176 event.u.mlme.status = MLME_SUCCESS; 5177 drv_event_callback(sdata->local, sdata, &event); 5178 sdata_info(sdata, "associated\n"); 5179 5180 info.success = 1; 5181 } 5182 5183 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5184 struct ieee80211_link_data *link; 5185 5186 link = sdata_dereference(sdata->link[link_id], sdata); 5187 if (!link) 5188 continue; 5189 if (!assoc_data->link[link_id].bss) 5190 continue; 5191 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5192 resp.links[link_id].addr = link->conf->addr; 5193 5194 /* get uapsd queues configuration - same for all links */ 5195 resp.uapsd_queues = 0; 5196 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5197 if (link->tx_conf[ac].uapsd) 5198 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5199 } 5200 5201 ieee80211_destroy_assoc_data(sdata, 5202 status_code == WLAN_STATUS_SUCCESS ? 5203 ASSOC_SUCCESS : 5204 ASSOC_REJECTED); 5205 5206 resp.buf = (u8 *)mgmt; 5207 resp.len = len; 5208 resp.req_ies = ifmgd->assoc_req_ies; 5209 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5210 if (sdata->vif.valid_links) 5211 resp.ap_mld_addr = sdata->vif.cfg.ap_addr; 5212 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5213 notify_driver: 5214 drv_mgd_complete_tx(sdata->local, sdata, &info); 5215 kfree(elems); 5216 return; 5217 abandon_assoc: 5218 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5219 goto notify_driver; 5220 } 5221 5222 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5223 struct ieee80211_mgmt *mgmt, size_t len, 5224 struct ieee80211_rx_status *rx_status) 5225 { 5226 struct ieee80211_sub_if_data *sdata = link->sdata; 5227 struct ieee80211_local *local = sdata->local; 5228 struct ieee80211_bss *bss; 5229 struct ieee80211_channel *channel; 5230 5231 sdata_assert_lock(sdata); 5232 5233 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5234 ieee80211_rx_status_to_khz(rx_status)); 5235 if (!channel) 5236 return; 5237 5238 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5239 if (bss) { 5240 link->conf->beacon_rate = bss->beacon_rate; 5241 ieee80211_rx_bss_put(local, bss); 5242 } 5243 } 5244 5245 5246 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5247 struct sk_buff *skb) 5248 { 5249 struct ieee80211_sub_if_data *sdata = link->sdata; 5250 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5251 struct ieee80211_if_managed *ifmgd; 5252 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5253 struct ieee80211_channel *channel; 5254 size_t baselen, len = skb->len; 5255 5256 ifmgd = &sdata->u.mgd; 5257 5258 sdata_assert_lock(sdata); 5259 5260 /* 5261 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5262 * "If a 6 GHz AP receives a Probe Request frame and responds with 5263 * a Probe Response frame [..], the Address 1 field of the Probe 5264 * Response frame shall be set to the broadcast address [..]" 5265 * So, on 6GHz band we should also accept broadcast responses. 5266 */ 5267 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5268 rx_status->freq); 5269 if (!channel) 5270 return; 5271 5272 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5273 (channel->band != NL80211_BAND_6GHZ || 5274 !is_broadcast_ether_addr(mgmt->da))) 5275 return; /* ignore ProbeResp to foreign address */ 5276 5277 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5278 if (baselen > len) 5279 return; 5280 5281 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5282 5283 if (ifmgd->associated && 5284 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5285 ieee80211_reset_ap_probe(sdata); 5286 } 5287 5288 /* 5289 * This is the canonical list of information elements we care about, 5290 * the filter code also gives us all changes to the Microsoft OUI 5291 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5292 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5293 * changes to requested client power. 5294 * 5295 * We implement beacon filtering in software since that means we can 5296 * avoid processing the frame here and in cfg80211, and userspace 5297 * will not be able to tell whether the hardware supports it or not. 5298 * 5299 * XXX: This list needs to be dynamic -- userspace needs to be able to 5300 * add items it requires. It also needs to be able to tell us to 5301 * look out for other vendor IEs. 5302 */ 5303 static const u64 care_about_ies = 5304 (1ULL << WLAN_EID_COUNTRY) | 5305 (1ULL << WLAN_EID_ERP_INFO) | 5306 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5307 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5308 (1ULL << WLAN_EID_HT_CAPABILITY) | 5309 (1ULL << WLAN_EID_HT_OPERATION) | 5310 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5311 5312 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5313 struct ieee80211_if_managed *ifmgd, 5314 struct ieee80211_bss_conf *bss_conf, 5315 struct ieee80211_local *local, 5316 struct ieee80211_rx_status *rx_status) 5317 { 5318 struct ieee80211_sub_if_data *sdata = link->sdata; 5319 5320 /* Track average RSSI from the Beacon frames of the current AP */ 5321 5322 if (!link->u.mgd.tracking_signal_avg) { 5323 link->u.mgd.tracking_signal_avg = true; 5324 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5325 link->u.mgd.last_cqm_event_signal = 0; 5326 link->u.mgd.count_beacon_signal = 1; 5327 link->u.mgd.last_ave_beacon_signal = 0; 5328 } else { 5329 link->u.mgd.count_beacon_signal++; 5330 } 5331 5332 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5333 -rx_status->signal); 5334 5335 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5336 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5337 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5338 int last_sig = link->u.mgd.last_ave_beacon_signal; 5339 struct ieee80211_event event = { 5340 .type = RSSI_EVENT, 5341 }; 5342 5343 /* 5344 * if signal crosses either of the boundaries, invoke callback 5345 * with appropriate parameters 5346 */ 5347 if (sig > ifmgd->rssi_max_thold && 5348 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5349 link->u.mgd.last_ave_beacon_signal = sig; 5350 event.u.rssi.data = RSSI_EVENT_HIGH; 5351 drv_event_callback(local, sdata, &event); 5352 } else if (sig < ifmgd->rssi_min_thold && 5353 (last_sig >= ifmgd->rssi_max_thold || 5354 last_sig == 0)) { 5355 link->u.mgd.last_ave_beacon_signal = sig; 5356 event.u.rssi.data = RSSI_EVENT_LOW; 5357 drv_event_callback(local, sdata, &event); 5358 } 5359 } 5360 5361 if (bss_conf->cqm_rssi_thold && 5362 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5363 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5364 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5365 int last_event = link->u.mgd.last_cqm_event_signal; 5366 int thold = bss_conf->cqm_rssi_thold; 5367 int hyst = bss_conf->cqm_rssi_hyst; 5368 5369 if (sig < thold && 5370 (last_event == 0 || sig < last_event - hyst)) { 5371 link->u.mgd.last_cqm_event_signal = sig; 5372 ieee80211_cqm_rssi_notify( 5373 &sdata->vif, 5374 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5375 sig, GFP_KERNEL); 5376 } else if (sig > thold && 5377 (last_event == 0 || sig > last_event + hyst)) { 5378 link->u.mgd.last_cqm_event_signal = sig; 5379 ieee80211_cqm_rssi_notify( 5380 &sdata->vif, 5381 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5382 sig, GFP_KERNEL); 5383 } 5384 } 5385 5386 if (bss_conf->cqm_rssi_low && 5387 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5388 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5389 int last_event = link->u.mgd.last_cqm_event_signal; 5390 int low = bss_conf->cqm_rssi_low; 5391 int high = bss_conf->cqm_rssi_high; 5392 5393 if (sig < low && 5394 (last_event == 0 || last_event >= low)) { 5395 link->u.mgd.last_cqm_event_signal = sig; 5396 ieee80211_cqm_rssi_notify( 5397 &sdata->vif, 5398 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5399 sig, GFP_KERNEL); 5400 } else if (sig > high && 5401 (last_event == 0 || last_event <= high)) { 5402 link->u.mgd.last_cqm_event_signal = sig; 5403 ieee80211_cqm_rssi_notify( 5404 &sdata->vif, 5405 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5406 sig, GFP_KERNEL); 5407 } 5408 } 5409 } 5410 5411 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5412 struct cfg80211_bss *bss) 5413 { 5414 if (ether_addr_equal(tx_bssid, bss->bssid)) 5415 return true; 5416 if (!bss->transmitted_bss) 5417 return false; 5418 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5419 } 5420 5421 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5422 struct ieee80211_hdr *hdr, size_t len, 5423 struct ieee80211_rx_status *rx_status) 5424 { 5425 struct ieee80211_sub_if_data *sdata = link->sdata; 5426 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5427 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5428 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5429 struct ieee80211_mgmt *mgmt = (void *) hdr; 5430 size_t baselen; 5431 struct ieee802_11_elems *elems; 5432 struct ieee80211_local *local = sdata->local; 5433 struct ieee80211_chanctx_conf *chanctx_conf; 5434 struct ieee80211_channel *chan; 5435 struct link_sta_info *link_sta; 5436 struct sta_info *sta; 5437 u32 changed = 0; 5438 bool erp_valid; 5439 u8 erp_value = 0; 5440 u32 ncrc = 0; 5441 u8 *bssid, *variable = mgmt->u.beacon.variable; 5442 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5443 struct ieee80211_elems_parse_params parse_params = { 5444 .link_id = -1, 5445 .from_ap = true, 5446 }; 5447 5448 sdata_assert_lock(sdata); 5449 5450 /* Process beacon from the current BSS */ 5451 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5452 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5453 struct ieee80211_ext *ext = (void *) mgmt; 5454 5455 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5456 variable = ext->u.s1g_short_beacon.variable; 5457 else 5458 variable = ext->u.s1g_beacon.variable; 5459 } 5460 5461 baselen = (u8 *) variable - (u8 *) mgmt; 5462 if (baselen > len) 5463 return; 5464 5465 parse_params.start = variable; 5466 parse_params.len = len - baselen; 5467 5468 rcu_read_lock(); 5469 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5470 if (!chanctx_conf) { 5471 rcu_read_unlock(); 5472 return; 5473 } 5474 5475 if (ieee80211_rx_status_to_khz(rx_status) != 5476 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5477 rcu_read_unlock(); 5478 return; 5479 } 5480 chan = chanctx_conf->def.chan; 5481 rcu_read_unlock(); 5482 5483 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5484 !WARN_ON(sdata->vif.valid_links) && 5485 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5486 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5487 elems = ieee802_11_parse_elems_full(&parse_params); 5488 if (!elems) 5489 return; 5490 5491 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5492 5493 if (elems->dtim_period) 5494 link->u.mgd.dtim_period = elems->dtim_period; 5495 link->u.mgd.have_beacon = true; 5496 ifmgd->assoc_data->need_beacon = false; 5497 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5498 link->conf->sync_tsf = 5499 le64_to_cpu(mgmt->u.beacon.timestamp); 5500 link->conf->sync_device_ts = 5501 rx_status->device_timestamp; 5502 link->conf->sync_dtim_count = elems->dtim_count; 5503 } 5504 5505 if (elems->mbssid_config_ie) 5506 bss_conf->profile_periodicity = 5507 elems->mbssid_config_ie->profile_periodicity; 5508 else 5509 bss_conf->profile_periodicity = 0; 5510 5511 if (elems->ext_capab_len >= 11 && 5512 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5513 bss_conf->ema_ap = true; 5514 else 5515 bss_conf->ema_ap = false; 5516 5517 /* continue assoc process */ 5518 ifmgd->assoc_data->timeout = jiffies; 5519 ifmgd->assoc_data->timeout_started = true; 5520 run_again(sdata, ifmgd->assoc_data->timeout); 5521 kfree(elems); 5522 return; 5523 } 5524 5525 if (!ifmgd->associated || 5526 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5527 return; 5528 bssid = link->u.mgd.bssid; 5529 5530 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5531 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5532 local, rx_status); 5533 5534 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5535 mlme_dbg_ratelimited(sdata, 5536 "cancelling AP probe due to a received beacon\n"); 5537 ieee80211_reset_ap_probe(sdata); 5538 } 5539 5540 /* 5541 * Push the beacon loss detection into the future since 5542 * we are processing a beacon from the AP just now. 5543 */ 5544 ieee80211_sta_reset_beacon_monitor(sdata); 5545 5546 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5547 * element (which carries the beacon interval). Don't forget to add a 5548 * bit to care_about_ies[] above if mac80211 is interested in a 5549 * changing S1G element. 5550 */ 5551 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5552 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5553 parse_params.bss = link->u.mgd.bss; 5554 parse_params.filter = care_about_ies; 5555 parse_params.crc = ncrc; 5556 elems = ieee802_11_parse_elems_full(&parse_params); 5557 if (!elems) 5558 return; 5559 ncrc = elems->crc; 5560 5561 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5562 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5563 if (local->hw.conf.dynamic_ps_timeout > 0) { 5564 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5565 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5566 ieee80211_hw_config(local, 5567 IEEE80211_CONF_CHANGE_PS); 5568 } 5569 ieee80211_send_nullfunc(local, sdata, false); 5570 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5571 local->pspolling = true; 5572 5573 /* 5574 * Here is assumed that the driver will be 5575 * able to send ps-poll frame and receive a 5576 * response even though power save mode is 5577 * enabled, but some drivers might require 5578 * to disable power save here. This needs 5579 * to be investigated. 5580 */ 5581 ieee80211_send_pspoll(local, sdata); 5582 } 5583 } 5584 5585 if (sdata->vif.p2p || 5586 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5587 struct ieee80211_p2p_noa_attr noa = {}; 5588 int ret; 5589 5590 ret = cfg80211_get_p2p_attr(variable, 5591 len - baselen, 5592 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5593 (u8 *) &noa, sizeof(noa)); 5594 if (ret >= 2) { 5595 if (link->u.mgd.p2p_noa_index != noa.index) { 5596 /* valid noa_attr and index changed */ 5597 link->u.mgd.p2p_noa_index = noa.index; 5598 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5599 changed |= BSS_CHANGED_P2P_PS; 5600 /* 5601 * make sure we update all information, the CRC 5602 * mechanism doesn't look at P2P attributes. 5603 */ 5604 link->u.mgd.beacon_crc_valid = false; 5605 } 5606 } else if (link->u.mgd.p2p_noa_index != -1) { 5607 /* noa_attr not found and we had valid noa_attr before */ 5608 link->u.mgd.p2p_noa_index = -1; 5609 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5610 changed |= BSS_CHANGED_P2P_PS; 5611 link->u.mgd.beacon_crc_valid = false; 5612 } 5613 } 5614 5615 if (link->u.mgd.csa_waiting_bcn) 5616 ieee80211_chswitch_post_beacon(link); 5617 5618 /* 5619 * Update beacon timing and dtim count on every beacon appearance. This 5620 * will allow the driver to use the most updated values. Do it before 5621 * comparing this one with last received beacon. 5622 * IMPORTANT: These parameters would possibly be out of sync by the time 5623 * the driver will use them. The synchronized view is currently 5624 * guaranteed only in certain callbacks. 5625 */ 5626 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5627 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5628 link->conf->sync_tsf = 5629 le64_to_cpu(mgmt->u.beacon.timestamp); 5630 link->conf->sync_device_ts = 5631 rx_status->device_timestamp; 5632 link->conf->sync_dtim_count = elems->dtim_count; 5633 } 5634 5635 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5636 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5637 goto free; 5638 link->u.mgd.beacon_crc = ncrc; 5639 link->u.mgd.beacon_crc_valid = true; 5640 5641 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5642 5643 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5644 rx_status->device_timestamp, 5645 elems, true); 5646 5647 if (!link->u.mgd.disable_wmm_tracking && 5648 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5649 elems->wmm_param_len, 5650 elems->mu_edca_param_set)) 5651 changed |= BSS_CHANGED_QOS; 5652 5653 /* 5654 * If we haven't had a beacon before, tell the driver about the 5655 * DTIM period (and beacon timing if desired) now. 5656 */ 5657 if (!link->u.mgd.have_beacon) { 5658 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5659 bss_conf->dtim_period = elems->dtim_period ?: 1; 5660 5661 changed |= BSS_CHANGED_BEACON_INFO; 5662 link->u.mgd.have_beacon = true; 5663 5664 mutex_lock(&local->iflist_mtx); 5665 ieee80211_recalc_ps(local); 5666 mutex_unlock(&local->iflist_mtx); 5667 5668 ieee80211_recalc_ps_vif(sdata); 5669 } 5670 5671 if (elems->erp_info) { 5672 erp_valid = true; 5673 erp_value = elems->erp_info[0]; 5674 } else { 5675 erp_valid = false; 5676 } 5677 5678 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5679 changed |= ieee80211_handle_bss_capability(link, 5680 le16_to_cpu(mgmt->u.beacon.capab_info), 5681 erp_valid, erp_value); 5682 5683 mutex_lock(&local->sta_mtx); 5684 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5685 if (WARN_ON(!sta)) { 5686 mutex_unlock(&local->sta_mtx); 5687 goto free; 5688 } 5689 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5690 lockdep_is_held(&local->sta_mtx)); 5691 if (WARN_ON(!link_sta)) { 5692 mutex_unlock(&local->sta_mtx); 5693 goto free; 5694 } 5695 5696 changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 5697 5698 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5699 elems->vht_cap_elem, elems->ht_operation, 5700 elems->vht_operation, elems->he_operation, 5701 elems->eht_operation, 5702 elems->s1g_oper, bssid, &changed)) { 5703 mutex_unlock(&local->sta_mtx); 5704 sdata_info(sdata, 5705 "failed to follow AP %pM bandwidth change, disconnect\n", 5706 bssid); 5707 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5708 WLAN_REASON_DEAUTH_LEAVING, 5709 true, deauth_buf); 5710 ieee80211_report_disconnect(sdata, deauth_buf, 5711 sizeof(deauth_buf), true, 5712 WLAN_REASON_DEAUTH_LEAVING, 5713 false); 5714 goto free; 5715 } 5716 5717 if (sta && elems->opmode_notif) 5718 ieee80211_vht_handle_opmode(sdata, link_sta, 5719 *elems->opmode_notif, 5720 rx_status->band); 5721 mutex_unlock(&local->sta_mtx); 5722 5723 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5724 elems->country_elem, 5725 elems->country_elem_len, 5726 elems->pwr_constr_elem, 5727 elems->cisco_dtpc_elem); 5728 5729 ieee80211_link_info_change_notify(sdata, link, changed); 5730 free: 5731 kfree(elems); 5732 } 5733 5734 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5735 struct sk_buff *skb) 5736 { 5737 struct ieee80211_link_data *link = &sdata->deflink; 5738 struct ieee80211_rx_status *rx_status; 5739 struct ieee80211_hdr *hdr; 5740 u16 fc; 5741 5742 rx_status = (struct ieee80211_rx_status *) skb->cb; 5743 hdr = (struct ieee80211_hdr *) skb->data; 5744 fc = le16_to_cpu(hdr->frame_control); 5745 5746 sdata_lock(sdata); 5747 switch (fc & IEEE80211_FCTL_STYPE) { 5748 case IEEE80211_STYPE_S1G_BEACON: 5749 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5750 break; 5751 } 5752 sdata_unlock(sdata); 5753 } 5754 5755 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5756 struct sk_buff *skb) 5757 { 5758 struct ieee80211_link_data *link = &sdata->deflink; 5759 struct ieee80211_rx_status *rx_status; 5760 struct ieee80211_mgmt *mgmt; 5761 u16 fc; 5762 int ies_len; 5763 5764 rx_status = (struct ieee80211_rx_status *) skb->cb; 5765 mgmt = (struct ieee80211_mgmt *) skb->data; 5766 fc = le16_to_cpu(mgmt->frame_control); 5767 5768 sdata_lock(sdata); 5769 5770 if (rx_status->link_valid) { 5771 link = sdata_dereference(sdata->link[rx_status->link_id], 5772 sdata); 5773 if (!link) 5774 goto out; 5775 } 5776 5777 switch (fc & IEEE80211_FCTL_STYPE) { 5778 case IEEE80211_STYPE_BEACON: 5779 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5780 skb->len, rx_status); 5781 break; 5782 case IEEE80211_STYPE_PROBE_RESP: 5783 ieee80211_rx_mgmt_probe_resp(link, skb); 5784 break; 5785 case IEEE80211_STYPE_AUTH: 5786 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5787 break; 5788 case IEEE80211_STYPE_DEAUTH: 5789 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5790 break; 5791 case IEEE80211_STYPE_DISASSOC: 5792 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5793 break; 5794 case IEEE80211_STYPE_ASSOC_RESP: 5795 case IEEE80211_STYPE_REASSOC_RESP: 5796 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5797 break; 5798 case IEEE80211_STYPE_ACTION: 5799 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 5800 struct ieee802_11_elems *elems; 5801 5802 ies_len = skb->len - 5803 offsetof(struct ieee80211_mgmt, 5804 u.action.u.chan_switch.variable); 5805 5806 if (ies_len < 0) 5807 break; 5808 5809 /* CSA IE cannot be overridden, no need for BSSID */ 5810 elems = ieee802_11_parse_elems( 5811 mgmt->u.action.u.chan_switch.variable, 5812 ies_len, true, NULL); 5813 5814 if (elems && !elems->parse_error) 5815 ieee80211_sta_process_chanswitch(link, 5816 rx_status->mactime, 5817 rx_status->device_timestamp, 5818 elems, false); 5819 kfree(elems); 5820 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 5821 struct ieee802_11_elems *elems; 5822 5823 ies_len = skb->len - 5824 offsetof(struct ieee80211_mgmt, 5825 u.action.u.ext_chan_switch.variable); 5826 5827 if (ies_len < 0) 5828 break; 5829 5830 /* 5831 * extended CSA IE can't be overridden, no need for 5832 * BSSID 5833 */ 5834 elems = ieee802_11_parse_elems( 5835 mgmt->u.action.u.ext_chan_switch.variable, 5836 ies_len, true, NULL); 5837 5838 if (elems && !elems->parse_error) { 5839 /* for the handling code pretend it was an IE */ 5840 elems->ext_chansw_ie = 5841 &mgmt->u.action.u.ext_chan_switch.data; 5842 5843 ieee80211_sta_process_chanswitch(link, 5844 rx_status->mactime, 5845 rx_status->device_timestamp, 5846 elems, false); 5847 } 5848 5849 kfree(elems); 5850 } 5851 break; 5852 } 5853 out: 5854 sdata_unlock(sdata); 5855 } 5856 5857 static void ieee80211_sta_timer(struct timer_list *t) 5858 { 5859 struct ieee80211_sub_if_data *sdata = 5860 from_timer(sdata, t, u.mgd.timer); 5861 5862 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 5863 } 5864 5865 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 5866 u8 reason, bool tx) 5867 { 5868 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5869 5870 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 5871 tx, frame_buf); 5872 5873 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5874 reason, false); 5875 } 5876 5877 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 5878 { 5879 struct ieee80211_local *local = sdata->local; 5880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5881 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 5882 u32 tx_flags = 0; 5883 u16 trans = 1; 5884 u16 status = 0; 5885 struct ieee80211_prep_tx_info info = { 5886 .subtype = IEEE80211_STYPE_AUTH, 5887 }; 5888 5889 sdata_assert_lock(sdata); 5890 5891 if (WARN_ON_ONCE(!auth_data)) 5892 return -EINVAL; 5893 5894 auth_data->tries++; 5895 5896 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 5897 sdata_info(sdata, "authentication with %pM timed out\n", 5898 auth_data->ap_addr); 5899 5900 /* 5901 * Most likely AP is not in the range so remove the 5902 * bss struct for that AP. 5903 */ 5904 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 5905 5906 return -ETIMEDOUT; 5907 } 5908 5909 if (auth_data->algorithm == WLAN_AUTH_SAE) 5910 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 5911 5912 drv_mgd_prepare_tx(local, sdata, &info); 5913 5914 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 5915 auth_data->ap_addr, auth_data->tries, 5916 IEEE80211_AUTH_MAX_TRIES); 5917 5918 auth_data->expected_transaction = 2; 5919 5920 if (auth_data->algorithm == WLAN_AUTH_SAE) { 5921 trans = auth_data->sae_trans; 5922 status = auth_data->sae_status; 5923 auth_data->expected_transaction = trans; 5924 } 5925 5926 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5927 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 5928 IEEE80211_TX_INTFL_MLME_CONN_TX; 5929 5930 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 5931 auth_data->data, auth_data->data_len, 5932 auth_data->ap_addr, auth_data->ap_addr, 5933 NULL, 0, 0, tx_flags); 5934 5935 if (tx_flags == 0) { 5936 if (auth_data->algorithm == WLAN_AUTH_SAE) 5937 auth_data->timeout = jiffies + 5938 IEEE80211_AUTH_TIMEOUT_SAE; 5939 else 5940 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 5941 } else { 5942 auth_data->timeout = 5943 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 5944 } 5945 5946 auth_data->timeout_started = true; 5947 run_again(sdata, auth_data->timeout); 5948 5949 return 0; 5950 } 5951 5952 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 5953 { 5954 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 5955 struct ieee80211_local *local = sdata->local; 5956 int ret; 5957 5958 sdata_assert_lock(sdata); 5959 5960 assoc_data->tries++; 5961 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 5962 sdata_info(sdata, "association with %pM timed out\n", 5963 assoc_data->ap_addr); 5964 5965 /* 5966 * Most likely AP is not in the range so remove the 5967 * bss struct for that AP. 5968 */ 5969 cfg80211_unlink_bss(local->hw.wiphy, 5970 assoc_data->link[assoc_data->assoc_link_id].bss); 5971 5972 return -ETIMEDOUT; 5973 } 5974 5975 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 5976 assoc_data->ap_addr, assoc_data->tries, 5977 IEEE80211_ASSOC_MAX_TRIES); 5978 ret = ieee80211_send_assoc(sdata); 5979 if (ret) 5980 return ret; 5981 5982 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 5983 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 5984 assoc_data->timeout_started = true; 5985 run_again(sdata, assoc_data->timeout); 5986 } else { 5987 assoc_data->timeout = 5988 round_jiffies_up(jiffies + 5989 IEEE80211_ASSOC_TIMEOUT_LONG); 5990 assoc_data->timeout_started = true; 5991 run_again(sdata, assoc_data->timeout); 5992 } 5993 5994 return 0; 5995 } 5996 5997 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 5998 __le16 fc, bool acked) 5999 { 6000 struct ieee80211_local *local = sdata->local; 6001 6002 sdata->u.mgd.status_fc = fc; 6003 sdata->u.mgd.status_acked = acked; 6004 sdata->u.mgd.status_received = true; 6005 6006 ieee80211_queue_work(&local->hw, &sdata->work); 6007 } 6008 6009 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6010 { 6011 struct ieee80211_local *local = sdata->local; 6012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6013 6014 sdata_lock(sdata); 6015 6016 if (ifmgd->status_received) { 6017 __le16 fc = ifmgd->status_fc; 6018 bool status_acked = ifmgd->status_acked; 6019 6020 ifmgd->status_received = false; 6021 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6022 if (status_acked) { 6023 if (ifmgd->auth_data->algorithm == 6024 WLAN_AUTH_SAE) 6025 ifmgd->auth_data->timeout = 6026 jiffies + 6027 IEEE80211_AUTH_TIMEOUT_SAE; 6028 else 6029 ifmgd->auth_data->timeout = 6030 jiffies + 6031 IEEE80211_AUTH_TIMEOUT_SHORT; 6032 run_again(sdata, ifmgd->auth_data->timeout); 6033 } else { 6034 ifmgd->auth_data->timeout = jiffies - 1; 6035 } 6036 ifmgd->auth_data->timeout_started = true; 6037 } else if (ifmgd->assoc_data && 6038 (ieee80211_is_assoc_req(fc) || 6039 ieee80211_is_reassoc_req(fc))) { 6040 if (status_acked) { 6041 ifmgd->assoc_data->timeout = 6042 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6043 run_again(sdata, ifmgd->assoc_data->timeout); 6044 } else { 6045 ifmgd->assoc_data->timeout = jiffies - 1; 6046 } 6047 ifmgd->assoc_data->timeout_started = true; 6048 } 6049 } 6050 6051 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6052 time_after(jiffies, ifmgd->auth_data->timeout)) { 6053 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6054 /* 6055 * ok ... we waited for assoc or continuation but 6056 * userspace didn't do it, so kill the auth data 6057 */ 6058 ieee80211_destroy_auth_data(sdata, false); 6059 } else if (ieee80211_auth(sdata)) { 6060 u8 ap_addr[ETH_ALEN]; 6061 struct ieee80211_event event = { 6062 .type = MLME_EVENT, 6063 .u.mlme.data = AUTH_EVENT, 6064 .u.mlme.status = MLME_TIMEOUT, 6065 }; 6066 6067 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6068 6069 ieee80211_destroy_auth_data(sdata, false); 6070 6071 cfg80211_auth_timeout(sdata->dev, ap_addr); 6072 drv_event_callback(sdata->local, sdata, &event); 6073 } 6074 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6075 run_again(sdata, ifmgd->auth_data->timeout); 6076 6077 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6078 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6079 if ((ifmgd->assoc_data->need_beacon && 6080 !sdata->deflink.u.mgd.have_beacon) || 6081 ieee80211_do_assoc(sdata)) { 6082 struct ieee80211_event event = { 6083 .type = MLME_EVENT, 6084 .u.mlme.data = ASSOC_EVENT, 6085 .u.mlme.status = MLME_TIMEOUT, 6086 }; 6087 6088 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6089 drv_event_callback(sdata->local, sdata, &event); 6090 } 6091 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6092 run_again(sdata, ifmgd->assoc_data->timeout); 6093 6094 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6095 ifmgd->associated) { 6096 u8 *bssid = sdata->deflink.u.mgd.bssid; 6097 int max_tries; 6098 6099 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6100 max_tries = max_nullfunc_tries; 6101 else 6102 max_tries = max_probe_tries; 6103 6104 /* ACK received for nullfunc probing frame */ 6105 if (!ifmgd->probe_send_count) 6106 ieee80211_reset_ap_probe(sdata); 6107 else if (ifmgd->nullfunc_failed) { 6108 if (ifmgd->probe_send_count < max_tries) { 6109 mlme_dbg(sdata, 6110 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6111 bssid, ifmgd->probe_send_count, 6112 max_tries); 6113 ieee80211_mgd_probe_ap_send(sdata); 6114 } else { 6115 mlme_dbg(sdata, 6116 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6117 bssid); 6118 ieee80211_sta_connection_lost(sdata, 6119 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6120 false); 6121 } 6122 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6123 run_again(sdata, ifmgd->probe_timeout); 6124 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6125 mlme_dbg(sdata, 6126 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6127 bssid, probe_wait_ms); 6128 ieee80211_sta_connection_lost(sdata, 6129 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6130 } else if (ifmgd->probe_send_count < max_tries) { 6131 mlme_dbg(sdata, 6132 "No probe response from AP %pM after %dms, try %d/%i\n", 6133 bssid, probe_wait_ms, 6134 ifmgd->probe_send_count, max_tries); 6135 ieee80211_mgd_probe_ap_send(sdata); 6136 } else { 6137 /* 6138 * We actually lost the connection ... or did we? 6139 * Let's make sure! 6140 */ 6141 mlme_dbg(sdata, 6142 "No probe response from AP %pM after %dms, disconnecting.\n", 6143 bssid, probe_wait_ms); 6144 6145 ieee80211_sta_connection_lost(sdata, 6146 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6147 } 6148 } 6149 6150 sdata_unlock(sdata); 6151 } 6152 6153 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6154 { 6155 struct ieee80211_sub_if_data *sdata = 6156 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6157 6158 if (WARN_ON(sdata->vif.valid_links)) 6159 return; 6160 6161 if (sdata->vif.bss_conf.csa_active && 6162 !sdata->deflink.u.mgd.csa_waiting_bcn) 6163 return; 6164 6165 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6166 return; 6167 6168 sdata->u.mgd.connection_loss = false; 6169 ieee80211_queue_work(&sdata->local->hw, 6170 &sdata->u.mgd.beacon_connection_loss_work); 6171 } 6172 6173 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6174 { 6175 struct ieee80211_sub_if_data *sdata = 6176 from_timer(sdata, t, u.mgd.conn_mon_timer); 6177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6178 struct ieee80211_local *local = sdata->local; 6179 struct sta_info *sta; 6180 unsigned long timeout; 6181 6182 if (WARN_ON(sdata->vif.valid_links)) 6183 return; 6184 6185 if (sdata->vif.bss_conf.csa_active && 6186 !sdata->deflink.u.mgd.csa_waiting_bcn) 6187 return; 6188 6189 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6190 if (!sta) 6191 return; 6192 6193 timeout = sta->deflink.status_stats.last_ack; 6194 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6195 timeout = sta->deflink.rx_stats.last_rx; 6196 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6197 6198 /* If timeout is after now, then update timer to fire at 6199 * the later date, but do not actually probe at this time. 6200 */ 6201 if (time_is_after_jiffies(timeout)) { 6202 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6203 return; 6204 } 6205 6206 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6207 } 6208 6209 static void ieee80211_sta_monitor_work(struct work_struct *work) 6210 { 6211 struct ieee80211_sub_if_data *sdata = 6212 container_of(work, struct ieee80211_sub_if_data, 6213 u.mgd.monitor_work); 6214 6215 ieee80211_mgd_probe_ap(sdata, false); 6216 } 6217 6218 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6219 { 6220 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6221 __ieee80211_stop_poll(sdata); 6222 6223 /* let's probe the connection once */ 6224 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6225 ieee80211_queue_work(&sdata->local->hw, 6226 &sdata->u.mgd.monitor_work); 6227 } 6228 } 6229 6230 #ifdef CONFIG_PM 6231 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6232 { 6233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6234 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6235 6236 sdata_lock(sdata); 6237 6238 if (ifmgd->auth_data || ifmgd->assoc_data) { 6239 const u8 *ap_addr = ifmgd->auth_data ? 6240 ifmgd->auth_data->ap_addr : 6241 ifmgd->assoc_data->ap_addr; 6242 6243 /* 6244 * If we are trying to authenticate / associate while suspending, 6245 * cfg80211 won't know and won't actually abort those attempts, 6246 * thus we need to do that ourselves. 6247 */ 6248 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6249 IEEE80211_STYPE_DEAUTH, 6250 WLAN_REASON_DEAUTH_LEAVING, 6251 false, frame_buf); 6252 if (ifmgd->assoc_data) 6253 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6254 if (ifmgd->auth_data) 6255 ieee80211_destroy_auth_data(sdata, false); 6256 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6257 IEEE80211_DEAUTH_FRAME_LEN, 6258 false); 6259 } 6260 6261 /* This is a bit of a hack - we should find a better and more generic 6262 * solution to this. Normally when suspending, cfg80211 will in fact 6263 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6264 * auth (not so important) or assoc (this is the problem) process. 6265 * 6266 * As a consequence, it can happen that we are in the process of both 6267 * associating and suspending, and receive an association response 6268 * after cfg80211 has checked if it needs to disconnect, but before 6269 * we actually set the flag to drop incoming frames. This will then 6270 * cause the workqueue flush to process the association response in 6271 * the suspend, resulting in a successful association just before it 6272 * tries to remove the interface from the driver, which now though 6273 * has a channel context assigned ... this results in issues. 6274 * 6275 * To work around this (for now) simply deauth here again if we're 6276 * now connected. 6277 */ 6278 if (ifmgd->associated && !sdata->local->wowlan) { 6279 u8 bssid[ETH_ALEN]; 6280 struct cfg80211_deauth_request req = { 6281 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6282 .bssid = bssid, 6283 }; 6284 6285 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6286 ieee80211_mgd_deauth(sdata, &req); 6287 } 6288 6289 sdata_unlock(sdata); 6290 } 6291 #endif 6292 6293 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6294 { 6295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6296 6297 sdata_lock(sdata); 6298 if (!ifmgd->associated) { 6299 sdata_unlock(sdata); 6300 return; 6301 } 6302 6303 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6304 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6305 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6306 ieee80211_sta_connection_lost(sdata, 6307 WLAN_REASON_UNSPECIFIED, 6308 true); 6309 sdata_unlock(sdata); 6310 return; 6311 } 6312 6313 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6314 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6315 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6316 ieee80211_sta_connection_lost(sdata, 6317 WLAN_REASON_UNSPECIFIED, 6318 true); 6319 sdata_unlock(sdata); 6320 return; 6321 } 6322 6323 sdata_unlock(sdata); 6324 } 6325 6326 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6327 { 6328 struct ieee80211_link_data *link = 6329 container_of(work, struct ieee80211_link_data, 6330 u.mgd.request_smps_work); 6331 6332 sdata_lock(link->sdata); 6333 __ieee80211_request_smps_mgd(link->sdata, link, 6334 link->u.mgd.driver_smps_mode); 6335 sdata_unlock(link->sdata); 6336 } 6337 6338 /* interface setup */ 6339 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6340 { 6341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6342 6343 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6344 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6345 ieee80211_beacon_connection_loss_work); 6346 INIT_WORK(&ifmgd->csa_connection_drop_work, 6347 ieee80211_csa_connection_drop_work); 6348 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6349 ieee80211_tdls_peer_del_work); 6350 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6351 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6352 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6353 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6354 ieee80211_sta_handle_tspec_ac_params_wk); 6355 6356 ifmgd->flags = 0; 6357 ifmgd->powersave = sdata->wdev.ps; 6358 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6359 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6360 /* Setup TDLS data */ 6361 spin_lock_init(&ifmgd->teardown_lock); 6362 ifmgd->teardown_skb = NULL; 6363 ifmgd->orig_teardown_skb = NULL; 6364 } 6365 6366 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6367 { 6368 struct ieee80211_sub_if_data *sdata = link->sdata; 6369 struct ieee80211_local *local = sdata->local; 6370 unsigned int link_id = link->link_id; 6371 6372 link->u.mgd.p2p_noa_index = -1; 6373 link->u.mgd.conn_flags = 0; 6374 link->conf->bssid = link->u.mgd.bssid; 6375 6376 INIT_WORK(&link->u.mgd.request_smps_work, 6377 ieee80211_request_smps_mgd_work); 6378 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6379 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6380 else 6381 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6382 6383 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6384 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6385 6386 if (sdata->u.mgd.assoc_data) 6387 ether_addr_copy(link->conf->addr, 6388 sdata->u.mgd.assoc_data->link[link_id].addr); 6389 else if (!is_valid_ether_addr(link->conf->addr)) 6390 eth_random_addr(link->conf->addr); 6391 } 6392 6393 /* scan finished notification */ 6394 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6395 { 6396 struct ieee80211_sub_if_data *sdata; 6397 6398 /* Restart STA timers */ 6399 rcu_read_lock(); 6400 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6401 if (ieee80211_sdata_running(sdata)) 6402 ieee80211_restart_sta_timer(sdata); 6403 } 6404 rcu_read_unlock(); 6405 } 6406 6407 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6408 struct cfg80211_bss *cbss, s8 link_id, 6409 const u8 *ap_mld_addr, bool assoc, 6410 bool override) 6411 { 6412 struct ieee80211_local *local = sdata->local; 6413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6414 struct ieee80211_bss *bss = (void *)cbss->priv; 6415 struct sta_info *new_sta = NULL; 6416 struct ieee80211_link_data *link; 6417 bool have_sta = false; 6418 bool mlo; 6419 int err; 6420 6421 if (link_id >= 0) { 6422 mlo = true; 6423 if (WARN_ON(!ap_mld_addr)) 6424 return -EINVAL; 6425 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6426 } else { 6427 if (WARN_ON(ap_mld_addr)) 6428 return -EINVAL; 6429 ap_mld_addr = cbss->bssid; 6430 err = ieee80211_vif_set_links(sdata, 0); 6431 link_id = 0; 6432 mlo = false; 6433 } 6434 6435 if (err) 6436 return err; 6437 6438 link = sdata_dereference(sdata->link[link_id], sdata); 6439 if (WARN_ON(!link)) { 6440 err = -ENOLINK; 6441 goto out_err; 6442 } 6443 6444 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6445 err = -EINVAL; 6446 goto out_err; 6447 } 6448 6449 /* If a reconfig is happening, bail out */ 6450 if (local->in_reconfig) { 6451 err = -EBUSY; 6452 goto out_err; 6453 } 6454 6455 if (assoc) { 6456 rcu_read_lock(); 6457 have_sta = sta_info_get(sdata, ap_mld_addr); 6458 rcu_read_unlock(); 6459 } 6460 6461 if (!have_sta) { 6462 if (mlo) 6463 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6464 link_id, cbss->bssid, 6465 GFP_KERNEL); 6466 else 6467 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6468 6469 if (!new_sta) { 6470 err = -ENOMEM; 6471 goto out_err; 6472 } 6473 6474 new_sta->sta.mlo = mlo; 6475 } 6476 6477 /* 6478 * Set up the information for the new channel before setting the 6479 * new channel. We can't - completely race-free - change the basic 6480 * rates bitmap and the channel (sband) that it refers to, but if 6481 * we set it up before we at least avoid calling into the driver's 6482 * bss_info_changed() method with invalid information (since we do 6483 * call that from changing the channel - only for IDLE and perhaps 6484 * some others, but ...). 6485 * 6486 * So to avoid that, just set up all the new information before the 6487 * channel, but tell the driver to apply it only afterwards, since 6488 * it might need the new channel for that. 6489 */ 6490 if (new_sta) { 6491 const struct cfg80211_bss_ies *ies; 6492 struct link_sta_info *link_sta; 6493 6494 rcu_read_lock(); 6495 link_sta = rcu_dereference(new_sta->link[link_id]); 6496 if (WARN_ON(!link_sta)) { 6497 rcu_read_unlock(); 6498 sta_info_free(local, new_sta); 6499 err = -EINVAL; 6500 goto out_err; 6501 } 6502 6503 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6504 link_sta, cbss); 6505 if (err) { 6506 rcu_read_unlock(); 6507 sta_info_free(local, new_sta); 6508 goto out_err; 6509 } 6510 6511 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6512 6513 /* set timing information */ 6514 link->conf->beacon_int = cbss->beacon_interval; 6515 ies = rcu_dereference(cbss->beacon_ies); 6516 if (ies) { 6517 link->conf->sync_tsf = ies->tsf; 6518 link->conf->sync_device_ts = 6519 bss->device_ts_beacon; 6520 6521 ieee80211_get_dtim(ies, 6522 &link->conf->sync_dtim_count, 6523 NULL); 6524 } else if (!ieee80211_hw_check(&sdata->local->hw, 6525 TIMING_BEACON_ONLY)) { 6526 ies = rcu_dereference(cbss->proberesp_ies); 6527 /* must be non-NULL since beacon IEs were NULL */ 6528 link->conf->sync_tsf = ies->tsf; 6529 link->conf->sync_device_ts = 6530 bss->device_ts_presp; 6531 link->conf->sync_dtim_count = 0; 6532 } else { 6533 link->conf->sync_tsf = 0; 6534 link->conf->sync_device_ts = 0; 6535 link->conf->sync_dtim_count = 0; 6536 } 6537 rcu_read_unlock(); 6538 } 6539 6540 if (new_sta || override) { 6541 err = ieee80211_prep_channel(sdata, link, cbss, 6542 &link->u.mgd.conn_flags); 6543 if (err) { 6544 if (new_sta) 6545 sta_info_free(local, new_sta); 6546 goto out_err; 6547 } 6548 } 6549 6550 if (new_sta) { 6551 /* 6552 * tell driver about BSSID, basic rates and timing 6553 * this was set up above, before setting the channel 6554 */ 6555 ieee80211_link_info_change_notify(sdata, link, 6556 BSS_CHANGED_BSSID | 6557 BSS_CHANGED_BASIC_RATES | 6558 BSS_CHANGED_BEACON_INT); 6559 6560 if (assoc) 6561 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6562 6563 err = sta_info_insert(new_sta); 6564 new_sta = NULL; 6565 if (err) { 6566 sdata_info(sdata, 6567 "failed to insert STA entry for the AP (error %d)\n", 6568 err); 6569 goto out_err; 6570 } 6571 } else 6572 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6573 6574 /* Cancel scan to ensure that nothing interferes with connection */ 6575 if (local->scanning) 6576 ieee80211_scan_cancel(local); 6577 6578 return 0; 6579 6580 out_err: 6581 ieee80211_link_release_channel(&sdata->deflink); 6582 ieee80211_vif_set_links(sdata, 0); 6583 return err; 6584 } 6585 6586 /* config hooks */ 6587 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6588 struct cfg80211_auth_request *req) 6589 { 6590 struct ieee80211_local *local = sdata->local; 6591 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6592 struct ieee80211_mgd_auth_data *auth_data; 6593 u16 auth_alg; 6594 int err; 6595 bool cont_auth; 6596 6597 /* prepare auth data structure */ 6598 6599 switch (req->auth_type) { 6600 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6601 auth_alg = WLAN_AUTH_OPEN; 6602 break; 6603 case NL80211_AUTHTYPE_SHARED_KEY: 6604 if (fips_enabled) 6605 return -EOPNOTSUPP; 6606 auth_alg = WLAN_AUTH_SHARED_KEY; 6607 break; 6608 case NL80211_AUTHTYPE_FT: 6609 auth_alg = WLAN_AUTH_FT; 6610 break; 6611 case NL80211_AUTHTYPE_NETWORK_EAP: 6612 auth_alg = WLAN_AUTH_LEAP; 6613 break; 6614 case NL80211_AUTHTYPE_SAE: 6615 auth_alg = WLAN_AUTH_SAE; 6616 break; 6617 case NL80211_AUTHTYPE_FILS_SK: 6618 auth_alg = WLAN_AUTH_FILS_SK; 6619 break; 6620 case NL80211_AUTHTYPE_FILS_SK_PFS: 6621 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6622 break; 6623 case NL80211_AUTHTYPE_FILS_PK: 6624 auth_alg = WLAN_AUTH_FILS_PK; 6625 break; 6626 default: 6627 return -EOPNOTSUPP; 6628 } 6629 6630 if (ifmgd->assoc_data) 6631 return -EBUSY; 6632 6633 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6634 req->ie_len, GFP_KERNEL); 6635 if (!auth_data) 6636 return -ENOMEM; 6637 6638 memcpy(auth_data->ap_addr, 6639 req->ap_mld_addr ?: req->bss->bssid, 6640 ETH_ALEN); 6641 auth_data->bss = req->bss; 6642 6643 if (req->auth_data_len >= 4) { 6644 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6645 __le16 *pos = (__le16 *) req->auth_data; 6646 6647 auth_data->sae_trans = le16_to_cpu(pos[0]); 6648 auth_data->sae_status = le16_to_cpu(pos[1]); 6649 } 6650 memcpy(auth_data->data, req->auth_data + 4, 6651 req->auth_data_len - 4); 6652 auth_data->data_len += req->auth_data_len - 4; 6653 } 6654 6655 /* Check if continuing authentication or trying to authenticate with the 6656 * same BSS that we were in the process of authenticating with and avoid 6657 * removal and re-addition of the STA entry in 6658 * ieee80211_prep_connection(). 6659 */ 6660 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 6661 6662 if (req->ie && req->ie_len) { 6663 memcpy(&auth_data->data[auth_data->data_len], 6664 req->ie, req->ie_len); 6665 auth_data->data_len += req->ie_len; 6666 } 6667 6668 if (req->key && req->key_len) { 6669 auth_data->key_len = req->key_len; 6670 auth_data->key_idx = req->key_idx; 6671 memcpy(auth_data->key, req->key, req->key_len); 6672 } 6673 6674 auth_data->algorithm = auth_alg; 6675 6676 /* try to authenticate/probe */ 6677 6678 if (ifmgd->auth_data) { 6679 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6680 auth_data->peer_confirmed = 6681 ifmgd->auth_data->peer_confirmed; 6682 } 6683 ieee80211_destroy_auth_data(sdata, cont_auth); 6684 } 6685 6686 /* prep auth_data so we don't go into idle on disassoc */ 6687 ifmgd->auth_data = auth_data; 6688 6689 /* If this is continuation of an ongoing SAE authentication exchange 6690 * (i.e., request to send SAE Confirm) and the peer has already 6691 * confirmed, mark authentication completed since we are about to send 6692 * out SAE Confirm. 6693 */ 6694 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6695 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6696 ieee80211_mark_sta_auth(sdata); 6697 6698 if (ifmgd->associated) { 6699 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6700 6701 sdata_info(sdata, 6702 "disconnect from AP %pM for new auth to %pM\n", 6703 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6704 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6705 WLAN_REASON_UNSPECIFIED, 6706 false, frame_buf); 6707 6708 ieee80211_report_disconnect(sdata, frame_buf, 6709 sizeof(frame_buf), true, 6710 WLAN_REASON_UNSPECIFIED, 6711 false); 6712 } 6713 6714 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6715 6716 /* needed for transmitting the auth frame(s) properly */ 6717 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6718 6719 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6720 req->ap_mld_addr, cont_auth, false); 6721 if (err) 6722 goto err_clear; 6723 6724 err = ieee80211_auth(sdata); 6725 if (err) { 6726 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6727 goto err_clear; 6728 } 6729 6730 /* hold our own reference */ 6731 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6732 return 0; 6733 6734 err_clear: 6735 if (!sdata->vif.valid_links) { 6736 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6737 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6738 BSS_CHANGED_BSSID); 6739 mutex_lock(&sdata->local->mtx); 6740 ieee80211_link_release_channel(&sdata->deflink); 6741 mutex_unlock(&sdata->local->mtx); 6742 } 6743 ifmgd->auth_data = NULL; 6744 kfree(auth_data); 6745 return err; 6746 } 6747 6748 static ieee80211_conn_flags_t 6749 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6750 struct ieee80211_mgd_assoc_data *assoc_data, 6751 struct cfg80211_assoc_request *req, 6752 ieee80211_conn_flags_t conn_flags, 6753 unsigned int link_id) 6754 { 6755 struct ieee80211_local *local = sdata->local; 6756 const struct cfg80211_bss_ies *beacon_ies; 6757 struct ieee80211_supported_band *sband; 6758 const struct element *ht_elem, *vht_elem; 6759 struct ieee80211_link_data *link; 6760 struct cfg80211_bss *cbss; 6761 struct ieee80211_bss *bss; 6762 bool is_5ghz, is_6ghz; 6763 6764 cbss = assoc_data->link[link_id].bss; 6765 if (WARN_ON(!cbss)) 6766 return 0; 6767 6768 bss = (void *)cbss->priv; 6769 6770 sband = local->hw.wiphy->bands[cbss->channel->band]; 6771 if (WARN_ON(!sband)) 6772 return 0; 6773 6774 link = sdata_dereference(sdata->link[link_id], sdata); 6775 if (WARN_ON(!link)) 6776 return 0; 6777 6778 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6779 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6780 6781 /* for MLO connections assume advertising all rates is OK */ 6782 if (!req->ap_mld_addr) { 6783 assoc_data->supp_rates = bss->supp_rates; 6784 assoc_data->supp_rates_len = bss->supp_rates_len; 6785 } 6786 6787 /* copy and link elems for the STA profile */ 6788 if (req->links[link_id].elems_len) { 6789 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6790 req->links[link_id].elems_len); 6791 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6792 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6793 assoc_data->ie_pos += req->links[link_id].elems_len; 6794 } 6795 6796 rcu_read_lock(); 6797 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 6798 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6799 assoc_data->link[link_id].ap_ht_param = 6800 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6801 else if (!is_6ghz) 6802 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6803 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 6804 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6805 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 6806 sizeof(struct ieee80211_vht_cap)); 6807 } else if (is_5ghz) { 6808 link_info(link, 6809 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6810 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 6811 IEEE80211_CONN_DISABLE_HE | 6812 IEEE80211_CONN_DISABLE_EHT; 6813 } 6814 rcu_read_unlock(); 6815 6816 link->u.mgd.beacon_crc_valid = false; 6817 link->u.mgd.dtim_period = 0; 6818 link->u.mgd.have_beacon = false; 6819 6820 /* override HT/VHT configuration only if the AP and we support it */ 6821 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 6822 struct ieee80211_sta_ht_cap sta_ht_cap; 6823 6824 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6825 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6826 } 6827 6828 rcu_read_lock(); 6829 beacon_ies = rcu_dereference(cbss->beacon_ies); 6830 if (beacon_ies) { 6831 const struct element *elem; 6832 u8 dtim_count = 0; 6833 6834 ieee80211_get_dtim(beacon_ies, &dtim_count, 6835 &link->u.mgd.dtim_period); 6836 6837 sdata->deflink.u.mgd.have_beacon = true; 6838 6839 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6840 link->conf->sync_tsf = beacon_ies->tsf; 6841 link->conf->sync_device_ts = bss->device_ts_beacon; 6842 link->conf->sync_dtim_count = dtim_count; 6843 } 6844 6845 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6846 beacon_ies->data, beacon_ies->len); 6847 if (elem && elem->datalen >= 3) 6848 link->conf->profile_periodicity = elem->data[2]; 6849 else 6850 link->conf->profile_periodicity = 0; 6851 6852 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6853 beacon_ies->data, beacon_ies->len); 6854 if (elem && elem->datalen >= 11 && 6855 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6856 link->conf->ema_ap = true; 6857 else 6858 link->conf->ema_ap = false; 6859 } 6860 rcu_read_unlock(); 6861 6862 if (bss->corrupt_data) { 6863 char *corrupt_type = "data"; 6864 6865 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6866 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6867 corrupt_type = "beacon and probe response"; 6868 else 6869 corrupt_type = "beacon"; 6870 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 6871 corrupt_type = "probe response"; 6872 } 6873 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 6874 cbss->bssid, corrupt_type); 6875 } 6876 6877 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 6878 if (sdata->u.mgd.powersave) 6879 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 6880 else 6881 link->smps_mode = IEEE80211_SMPS_OFF; 6882 } else { 6883 link->smps_mode = link->u.mgd.req_smps; 6884 } 6885 6886 return conn_flags; 6887 } 6888 6889 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 6890 struct cfg80211_assoc_request *req) 6891 { 6892 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 6893 struct ieee80211_local *local = sdata->local; 6894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6895 struct ieee80211_mgd_assoc_data *assoc_data; 6896 const struct element *ssid_elem; 6897 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6898 ieee80211_conn_flags_t conn_flags = 0; 6899 struct ieee80211_link_data *link; 6900 struct cfg80211_bss *cbss; 6901 struct ieee80211_bss *bss; 6902 bool override; 6903 int i, err; 6904 size_t size = sizeof(*assoc_data) + req->ie_len; 6905 6906 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 6907 size += req->links[i].elems_len; 6908 6909 /* FIXME: no support for 4-addr MLO yet */ 6910 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 6911 return -EOPNOTSUPP; 6912 6913 assoc_data = kzalloc(size, GFP_KERNEL); 6914 if (!assoc_data) 6915 return -ENOMEM; 6916 6917 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 6918 6919 rcu_read_lock(); 6920 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 6921 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 6922 rcu_read_unlock(); 6923 kfree(assoc_data); 6924 return -EINVAL; 6925 } 6926 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 6927 assoc_data->ssid_len = ssid_elem->datalen; 6928 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 6929 vif_cfg->ssid_len = assoc_data->ssid_len; 6930 rcu_read_unlock(); 6931 6932 if (req->ap_mld_addr) { 6933 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 6934 if (!req->links[i].bss) 6935 continue; 6936 link = sdata_dereference(sdata->link[i], sdata); 6937 if (link) 6938 ether_addr_copy(assoc_data->link[i].addr, 6939 link->conf->addr); 6940 else 6941 eth_random_addr(assoc_data->link[i].addr); 6942 } 6943 } else { 6944 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 6945 } 6946 6947 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 6948 6949 memcpy(assoc_data->ap_addr, 6950 req->ap_mld_addr ?: req->bss->bssid, 6951 ETH_ALEN); 6952 6953 if (ifmgd->associated) { 6954 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6955 6956 sdata_info(sdata, 6957 "disconnect from AP %pM for new assoc to %pM\n", 6958 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 6959 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6960 WLAN_REASON_UNSPECIFIED, 6961 false, frame_buf); 6962 6963 ieee80211_report_disconnect(sdata, frame_buf, 6964 sizeof(frame_buf), true, 6965 WLAN_REASON_UNSPECIFIED, 6966 false); 6967 } 6968 6969 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 6970 err = -EBUSY; 6971 goto err_free; 6972 } 6973 6974 if (ifmgd->assoc_data) { 6975 err = -EBUSY; 6976 goto err_free; 6977 } 6978 6979 if (ifmgd->auth_data) { 6980 bool match; 6981 6982 /* keep sta info, bssid if matching */ 6983 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 6984 assoc_data->ap_addr); 6985 ieee80211_destroy_auth_data(sdata, match); 6986 } 6987 6988 /* prepare assoc data */ 6989 6990 bss = (void *)cbss->priv; 6991 assoc_data->wmm = bss->wmm_used && 6992 (local->hw.queues >= IEEE80211_NUM_ACS); 6993 6994 /* 6995 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 6996 * We still associate in non-HT mode (11a/b/g) if any one of these 6997 * ciphers is configured as pairwise. 6998 * We can set this to true for non-11n hardware, that'll be checked 6999 * separately along with the peer capabilities. 7000 */ 7001 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7002 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7003 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7004 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7005 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7006 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7007 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7008 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7009 netdev_info(sdata->dev, 7010 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7011 } 7012 } 7013 7014 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7015 if (!bss->wmm_used) { 7016 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7017 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7018 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7019 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7020 netdev_info(sdata->dev, 7021 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7022 } 7023 7024 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7025 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7026 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7027 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7028 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7029 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7030 } 7031 7032 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7033 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7034 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7035 } 7036 7037 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7038 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7039 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7040 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7041 } 7042 7043 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7044 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7045 7046 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7047 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7048 sizeof(ifmgd->ht_capa_mask)); 7049 7050 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7051 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7052 sizeof(ifmgd->vht_capa_mask)); 7053 7054 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7055 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7056 sizeof(ifmgd->s1g_capa_mask)); 7057 7058 if (req->ie && req->ie_len) { 7059 memcpy(assoc_data->ie, req->ie, req->ie_len); 7060 assoc_data->ie_len = req->ie_len; 7061 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7062 } else { 7063 assoc_data->ie_pos = assoc_data->ie; 7064 } 7065 7066 if (req->fils_kek) { 7067 /* should already be checked in cfg80211 - so warn */ 7068 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7069 err = -EINVAL; 7070 goto err_free; 7071 } 7072 memcpy(assoc_data->fils_kek, req->fils_kek, 7073 req->fils_kek_len); 7074 assoc_data->fils_kek_len = req->fils_kek_len; 7075 } 7076 7077 if (req->fils_nonces) 7078 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7079 2 * FILS_NONCE_LEN); 7080 7081 /* default timeout */ 7082 assoc_data->timeout = jiffies; 7083 assoc_data->timeout_started = true; 7084 7085 assoc_data->assoc_link_id = assoc_link_id; 7086 7087 if (req->ap_mld_addr) { 7088 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7089 assoc_data->link[i].conn_flags = conn_flags; 7090 assoc_data->link[i].bss = req->links[i].bss; 7091 } 7092 7093 /* if there was no authentication, set up the link */ 7094 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7095 if (err) 7096 goto err_clear; 7097 } else { 7098 assoc_data->link[0].conn_flags = conn_flags; 7099 assoc_data->link[0].bss = cbss; 7100 } 7101 7102 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7103 if (WARN_ON(!link)) { 7104 err = -EINVAL; 7105 goto err_clear; 7106 } 7107 7108 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7109 conn_flags |= link->u.mgd.conn_flags; 7110 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7111 conn_flags, assoc_link_id); 7112 override = link->u.mgd.conn_flags != conn_flags; 7113 link->u.mgd.conn_flags |= conn_flags; 7114 7115 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7116 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7117 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7118 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7119 7120 if (bss->wmm_used && bss->uapsd_supported && 7121 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7122 assoc_data->uapsd = true; 7123 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7124 } else { 7125 assoc_data->uapsd = false; 7126 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7127 } 7128 7129 if (req->prev_bssid) 7130 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7131 7132 if (req->use_mfp) { 7133 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7134 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7135 } else { 7136 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7137 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7138 } 7139 7140 if (req->flags & ASSOC_REQ_USE_RRM) 7141 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7142 else 7143 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7144 7145 if (req->crypto.control_port) 7146 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7147 else 7148 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7149 7150 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7151 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7152 sdata->control_port_over_nl80211 = 7153 req->crypto.control_port_over_nl80211; 7154 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7155 7156 /* kick off associate process */ 7157 ifmgd->assoc_data = assoc_data; 7158 7159 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7160 if (!assoc_data->link[i].bss) 7161 continue; 7162 if (i == assoc_data->assoc_link_id) 7163 continue; 7164 /* only calculate the flags, hence link == NULL */ 7165 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7166 &assoc_data->link[i].conn_flags); 7167 if (err) 7168 goto err_clear; 7169 } 7170 7171 /* needed for transmitting the assoc frames properly */ 7172 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7173 7174 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7175 req->ap_mld_addr, true, override); 7176 if (err) 7177 goto err_clear; 7178 7179 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7180 link->u.mgd.conn_flags; 7181 7182 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7183 const struct cfg80211_bss_ies *beacon_ies; 7184 7185 rcu_read_lock(); 7186 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7187 7188 if (beacon_ies) { 7189 /* 7190 * Wait up to one beacon interval ... 7191 * should this be more if we miss one? 7192 */ 7193 sdata_info(sdata, "waiting for beacon from %pM\n", 7194 link->u.mgd.bssid); 7195 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7196 assoc_data->timeout_started = true; 7197 assoc_data->need_beacon = true; 7198 } 7199 rcu_read_unlock(); 7200 } 7201 7202 run_again(sdata, assoc_data->timeout); 7203 7204 return 0; 7205 err_clear: 7206 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7207 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7208 BSS_CHANGED_BSSID); 7209 ifmgd->assoc_data = NULL; 7210 err_free: 7211 kfree(assoc_data); 7212 return err; 7213 } 7214 7215 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7216 struct cfg80211_deauth_request *req) 7217 { 7218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7219 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7220 bool tx = !req->local_state_change; 7221 struct ieee80211_prep_tx_info info = { 7222 .subtype = IEEE80211_STYPE_DEAUTH, 7223 }; 7224 7225 if (ifmgd->auth_data && 7226 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7227 sdata_info(sdata, 7228 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7229 req->bssid, req->reason_code, 7230 ieee80211_get_reason_code_string(req->reason_code)); 7231 7232 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7233 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7234 IEEE80211_STYPE_DEAUTH, 7235 req->reason_code, tx, 7236 frame_buf); 7237 ieee80211_destroy_auth_data(sdata, false); 7238 ieee80211_report_disconnect(sdata, frame_buf, 7239 sizeof(frame_buf), true, 7240 req->reason_code, false); 7241 drv_mgd_complete_tx(sdata->local, sdata, &info); 7242 return 0; 7243 } 7244 7245 if (ifmgd->assoc_data && 7246 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7247 sdata_info(sdata, 7248 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7249 req->bssid, req->reason_code, 7250 ieee80211_get_reason_code_string(req->reason_code)); 7251 7252 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7253 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7254 IEEE80211_STYPE_DEAUTH, 7255 req->reason_code, tx, 7256 frame_buf); 7257 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7258 ieee80211_report_disconnect(sdata, frame_buf, 7259 sizeof(frame_buf), true, 7260 req->reason_code, false); 7261 return 0; 7262 } 7263 7264 if (ifmgd->associated && 7265 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7266 sdata_info(sdata, 7267 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7268 req->bssid, req->reason_code, 7269 ieee80211_get_reason_code_string(req->reason_code)); 7270 7271 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7272 req->reason_code, tx, frame_buf); 7273 ieee80211_report_disconnect(sdata, frame_buf, 7274 sizeof(frame_buf), true, 7275 req->reason_code, false); 7276 drv_mgd_complete_tx(sdata->local, sdata, &info); 7277 return 0; 7278 } 7279 7280 return -ENOTCONN; 7281 } 7282 7283 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7284 struct cfg80211_disassoc_request *req) 7285 { 7286 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7287 7288 if (!sdata->u.mgd.associated || 7289 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7290 return -ENOTCONN; 7291 7292 sdata_info(sdata, 7293 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7294 req->ap_addr, req->reason_code, 7295 ieee80211_get_reason_code_string(req->reason_code)); 7296 7297 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7298 req->reason_code, !req->local_state_change, 7299 frame_buf); 7300 7301 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7302 req->reason_code, false); 7303 7304 return 0; 7305 } 7306 7307 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7308 { 7309 cancel_work_sync(&link->u.mgd.request_smps_work); 7310 cancel_work_sync(&link->u.mgd.chswitch_work); 7311 } 7312 7313 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7314 { 7315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7316 7317 /* 7318 * Make sure some work items will not run after this, 7319 * they will not do anything but might not have been 7320 * cancelled when disconnecting. 7321 */ 7322 cancel_work_sync(&ifmgd->monitor_work); 7323 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7324 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7325 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7326 7327 sdata_lock(sdata); 7328 if (ifmgd->assoc_data) 7329 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7330 if (ifmgd->auth_data) 7331 ieee80211_destroy_auth_data(sdata, false); 7332 spin_lock_bh(&ifmgd->teardown_lock); 7333 if (ifmgd->teardown_skb) { 7334 kfree_skb(ifmgd->teardown_skb); 7335 ifmgd->teardown_skb = NULL; 7336 ifmgd->orig_teardown_skb = NULL; 7337 } 7338 kfree(ifmgd->assoc_req_ies); 7339 ifmgd->assoc_req_ies = NULL; 7340 ifmgd->assoc_req_ies_len = 0; 7341 spin_unlock_bh(&ifmgd->teardown_lock); 7342 del_timer_sync(&ifmgd->timer); 7343 sdata_unlock(sdata); 7344 } 7345 7346 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7347 enum nl80211_cqm_rssi_threshold_event rssi_event, 7348 s32 rssi_level, 7349 gfp_t gfp) 7350 { 7351 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7352 7353 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7354 7355 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7356 } 7357 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7358 7359 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7360 { 7361 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7362 7363 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7364 7365 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7366 } 7367 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7368 7369 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7370 int rssi_min_thold, 7371 int rssi_max_thold) 7372 { 7373 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7374 7375 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7376 return; 7377 7378 /* 7379 * Scale up threshold values before storing it, as the RSSI averaging 7380 * algorithm uses a scaled up value as well. Change this scaling 7381 * factor if the RSSI averaging algorithm changes. 7382 */ 7383 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7384 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7385 } 7386 7387 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7388 int rssi_min_thold, 7389 int rssi_max_thold) 7390 { 7391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7392 7393 WARN_ON(rssi_min_thold == rssi_max_thold || 7394 rssi_min_thold > rssi_max_thold); 7395 7396 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7397 rssi_max_thold); 7398 } 7399 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7400 7401 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7402 { 7403 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7404 7405 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7406 } 7407 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7408