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 bss_conf->beacon_rate = bss->beacon_rate; 2721 changed |= BSS_CHANGED_BEACON_INFO; 2722 } else { 2723 bss_conf->beacon_rate = NULL; 2724 } 2725 2726 /* Tell the driver to monitor connection quality (if supported) */ 2727 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2728 bss_conf->cqm_rssi_thold) 2729 changed |= BSS_CHANGED_CQM; 2730 2731 return changed; 2732 } 2733 2734 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2735 struct ieee80211_mgd_assoc_data *assoc_data, 2736 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2737 { 2738 struct ieee80211_local *local = sdata->local; 2739 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2740 u64 vif_changed = BSS_CHANGED_ASSOC; 2741 unsigned int link_id; 2742 2743 sdata->u.mgd.associated = true; 2744 2745 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2746 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2747 struct ieee80211_link_data *link; 2748 2749 if (!cbss || 2750 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2751 continue; 2752 2753 link = sdata_dereference(sdata->link[link_id], sdata); 2754 if (WARN_ON(!link)) 2755 return; 2756 2757 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2758 } 2759 2760 /* just to be sure */ 2761 ieee80211_stop_poll(sdata); 2762 2763 ieee80211_led_assoc(local, 1); 2764 2765 vif_cfg->assoc = 1; 2766 2767 /* Enable ARP filtering */ 2768 if (vif_cfg->arp_addr_cnt) 2769 vif_changed |= BSS_CHANGED_ARP_FILTER; 2770 2771 if (sdata->vif.valid_links) { 2772 for (link_id = 0; 2773 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2774 link_id++) { 2775 struct ieee80211_link_data *link; 2776 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2777 2778 if (!cbss || 2779 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2780 continue; 2781 2782 link = sdata_dereference(sdata->link[link_id], sdata); 2783 if (WARN_ON(!link)) 2784 return; 2785 2786 ieee80211_link_info_change_notify(sdata, link, 2787 changed[link_id]); 2788 2789 ieee80211_recalc_smps(sdata, link); 2790 } 2791 2792 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2793 } else { 2794 ieee80211_bss_info_change_notify(sdata, 2795 vif_changed | changed[0]); 2796 } 2797 2798 mutex_lock(&local->iflist_mtx); 2799 ieee80211_recalc_ps(local); 2800 mutex_unlock(&local->iflist_mtx); 2801 2802 /* leave this here to not change ordering in non-MLO cases */ 2803 if (!sdata->vif.valid_links) 2804 ieee80211_recalc_smps(sdata, &sdata->deflink); 2805 ieee80211_recalc_ps_vif(sdata); 2806 2807 netif_carrier_on(sdata->dev); 2808 } 2809 2810 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2811 u16 stype, u16 reason, bool tx, 2812 u8 *frame_buf) 2813 { 2814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2815 struct ieee80211_local *local = sdata->local; 2816 unsigned int link_id; 2817 u32 changed = 0; 2818 struct ieee80211_prep_tx_info info = { 2819 .subtype = stype, 2820 }; 2821 2822 sdata_assert_lock(sdata); 2823 2824 if (WARN_ON_ONCE(tx && !frame_buf)) 2825 return; 2826 2827 if (WARN_ON(!ifmgd->associated)) 2828 return; 2829 2830 ieee80211_stop_poll(sdata); 2831 2832 ifmgd->associated = false; 2833 2834 /* other links will be destroyed */ 2835 sdata->deflink.u.mgd.bss = NULL; 2836 2837 netif_carrier_off(sdata->dev); 2838 2839 /* 2840 * if we want to get out of ps before disassoc (why?) we have 2841 * to do it before sending disassoc, as otherwise the null-packet 2842 * won't be valid. 2843 */ 2844 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2845 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2846 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2847 } 2848 local->ps_sdata = NULL; 2849 2850 /* disable per-vif ps */ 2851 ieee80211_recalc_ps_vif(sdata); 2852 2853 /* make sure ongoing transmission finishes */ 2854 synchronize_net(); 2855 2856 /* 2857 * drop any frame before deauth/disassoc, this can be data or 2858 * management frame. Since we are disconnecting, we should not 2859 * insist sending these frames which can take time and delay 2860 * the disconnection and possible the roaming. 2861 */ 2862 if (tx) 2863 ieee80211_flush_queues(local, sdata, true); 2864 2865 /* deauthenticate/disassociate now */ 2866 if (tx || frame_buf) { 2867 /* 2868 * In multi channel scenarios guarantee that the virtual 2869 * interface is granted immediate airtime to transmit the 2870 * deauthentication frame by calling mgd_prepare_tx, if the 2871 * driver requested so. 2872 */ 2873 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2874 !sdata->deflink.u.mgd.have_beacon) { 2875 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2876 } 2877 2878 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2879 sdata->vif.cfg.ap_addr, stype, 2880 reason, tx, frame_buf); 2881 } 2882 2883 /* flush out frame - make sure the deauth was actually sent */ 2884 if (tx) 2885 ieee80211_flush_queues(local, sdata, false); 2886 2887 drv_mgd_complete_tx(sdata->local, sdata, &info); 2888 2889 /* clear AP addr only after building the needed mgmt frames */ 2890 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2891 eth_zero_addr(sdata->vif.cfg.ap_addr); 2892 2893 sdata->vif.cfg.ssid_len = 0; 2894 2895 /* remove AP and TDLS peers */ 2896 sta_info_flush(sdata); 2897 2898 /* finally reset all BSS / config parameters */ 2899 if (!sdata->vif.valid_links) 2900 changed |= ieee80211_reset_erp_info(sdata); 2901 2902 ieee80211_led_assoc(local, 0); 2903 changed |= BSS_CHANGED_ASSOC; 2904 sdata->vif.cfg.assoc = false; 2905 2906 sdata->deflink.u.mgd.p2p_noa_index = -1; 2907 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2908 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2909 2910 /* on the next assoc, re-program HT/VHT parameters */ 2911 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2912 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2913 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2914 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2915 2916 /* 2917 * reset MU-MIMO ownership and group data in default link, 2918 * if used, other links are destroyed 2919 */ 2920 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2921 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2922 memset(sdata->vif.bss_conf.mu_group.position, 0, 2923 sizeof(sdata->vif.bss_conf.mu_group.position)); 2924 if (!sdata->vif.valid_links) 2925 changed |= BSS_CHANGED_MU_GROUPS; 2926 sdata->vif.bss_conf.mu_mimo_owner = false; 2927 2928 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2929 2930 del_timer_sync(&local->dynamic_ps_timer); 2931 cancel_work_sync(&local->dynamic_ps_enable_work); 2932 2933 /* Disable ARP filtering */ 2934 if (sdata->vif.cfg.arp_addr_cnt) 2935 changed |= BSS_CHANGED_ARP_FILTER; 2936 2937 sdata->vif.bss_conf.qos = false; 2938 if (!sdata->vif.valid_links) { 2939 changed |= BSS_CHANGED_QOS; 2940 /* The BSSID (not really interesting) and HT changed */ 2941 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2942 ieee80211_bss_info_change_notify(sdata, changed); 2943 } else { 2944 ieee80211_vif_cfg_change_notify(sdata, changed); 2945 } 2946 2947 /* disassociated - set to defaults now */ 2948 ieee80211_set_wmm_default(&sdata->deflink, false, false); 2949 2950 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2951 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2952 del_timer_sync(&sdata->u.mgd.timer); 2953 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 2954 2955 sdata->vif.bss_conf.dtim_period = 0; 2956 sdata->vif.bss_conf.beacon_rate = NULL; 2957 2958 sdata->deflink.u.mgd.have_beacon = false; 2959 sdata->deflink.u.mgd.tracking_signal_avg = false; 2960 sdata->deflink.u.mgd.disable_wmm_tracking = false; 2961 2962 ifmgd->flags = 0; 2963 sdata->deflink.u.mgd.conn_flags = 0; 2964 mutex_lock(&local->mtx); 2965 2966 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 2967 struct ieee80211_link_data *link; 2968 2969 link = sdata_dereference(sdata->link[link_id], sdata); 2970 if (!link) 2971 continue; 2972 ieee80211_link_release_channel(link); 2973 } 2974 2975 sdata->vif.bss_conf.csa_active = false; 2976 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2977 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 2978 if (sdata->deflink.csa_block_tx) { 2979 ieee80211_wake_vif_queues(local, sdata, 2980 IEEE80211_QUEUE_STOP_REASON_CSA); 2981 sdata->deflink.csa_block_tx = false; 2982 } 2983 mutex_unlock(&local->mtx); 2984 2985 /* existing TX TSPEC sessions no longer exist */ 2986 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2987 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2988 2989 sdata->vif.bss_conf.pwr_reduction = 0; 2990 sdata->vif.bss_conf.tx_pwr_env_num = 0; 2991 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 2992 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 2993 2994 ieee80211_vif_set_links(sdata, 0); 2995 } 2996 2997 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2998 { 2999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3000 struct ieee80211_local *local = sdata->local; 3001 3002 mutex_lock(&local->mtx); 3003 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3004 goto out; 3005 3006 __ieee80211_stop_poll(sdata); 3007 3008 mutex_lock(&local->iflist_mtx); 3009 ieee80211_recalc_ps(local); 3010 mutex_unlock(&local->iflist_mtx); 3011 3012 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3013 goto out; 3014 3015 /* 3016 * We've received a probe response, but are not sure whether 3017 * we have or will be receiving any beacons or data, so let's 3018 * schedule the timers again, just in case. 3019 */ 3020 ieee80211_sta_reset_beacon_monitor(sdata); 3021 3022 mod_timer(&ifmgd->conn_mon_timer, 3023 round_jiffies_up(jiffies + 3024 IEEE80211_CONNECTION_IDLE_TIME)); 3025 out: 3026 mutex_unlock(&local->mtx); 3027 } 3028 3029 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3030 struct ieee80211_hdr *hdr, 3031 u16 tx_time) 3032 { 3033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3034 u16 tid; 3035 int ac; 3036 struct ieee80211_sta_tx_tspec *tx_tspec; 3037 unsigned long now = jiffies; 3038 3039 if (!ieee80211_is_data_qos(hdr->frame_control)) 3040 return; 3041 3042 tid = ieee80211_get_tid(hdr); 3043 ac = ieee80211_ac_from_tid(tid); 3044 tx_tspec = &ifmgd->tx_tspec[ac]; 3045 3046 if (likely(!tx_tspec->admitted_time)) 3047 return; 3048 3049 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3050 tx_tspec->consumed_tx_time = 0; 3051 tx_tspec->time_slice_start = now; 3052 3053 if (tx_tspec->downgraded) { 3054 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3055 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3056 } 3057 } 3058 3059 if (tx_tspec->downgraded) 3060 return; 3061 3062 tx_tspec->consumed_tx_time += tx_time; 3063 3064 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3065 tx_tspec->downgraded = true; 3066 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3067 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3068 } 3069 } 3070 3071 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3072 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3073 { 3074 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3075 3076 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3077 !sdata->u.mgd.probe_send_count) 3078 return; 3079 3080 if (ack) 3081 sdata->u.mgd.probe_send_count = 0; 3082 else 3083 sdata->u.mgd.nullfunc_failed = true; 3084 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3085 } 3086 3087 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3088 const u8 *src, const u8 *dst, 3089 const u8 *ssid, size_t ssid_len, 3090 struct ieee80211_channel *channel) 3091 { 3092 struct sk_buff *skb; 3093 3094 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3095 ssid, ssid_len, NULL, 0, 3096 IEEE80211_PROBE_FLAG_DIRECTED); 3097 if (skb) 3098 ieee80211_tx_skb(sdata, skb); 3099 } 3100 3101 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3102 { 3103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3104 u8 *dst = sdata->vif.cfg.ap_addr; 3105 u8 unicast_limit = max(1, max_probe_tries - 3); 3106 struct sta_info *sta; 3107 3108 if (WARN_ON(sdata->vif.valid_links)) 3109 return; 3110 3111 /* 3112 * Try sending broadcast probe requests for the last three 3113 * probe requests after the first ones failed since some 3114 * buggy APs only support broadcast probe requests. 3115 */ 3116 if (ifmgd->probe_send_count >= unicast_limit) 3117 dst = NULL; 3118 3119 /* 3120 * When the hardware reports an accurate Tx ACK status, it's 3121 * better to send a nullfunc frame instead of a probe request, 3122 * as it will kick us off the AP quickly if we aren't associated 3123 * anymore. The timeout will be reset if the frame is ACKed by 3124 * the AP. 3125 */ 3126 ifmgd->probe_send_count++; 3127 3128 if (dst) { 3129 mutex_lock(&sdata->local->sta_mtx); 3130 sta = sta_info_get(sdata, dst); 3131 if (!WARN_ON(!sta)) 3132 ieee80211_check_fast_rx(sta); 3133 mutex_unlock(&sdata->local->sta_mtx); 3134 } 3135 3136 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3137 ifmgd->nullfunc_failed = false; 3138 ieee80211_send_nullfunc(sdata->local, sdata, false); 3139 } else { 3140 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3141 sdata->vif.cfg.ssid, 3142 sdata->vif.cfg.ssid_len, 3143 sdata->deflink.u.mgd.bss->channel); 3144 } 3145 3146 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3147 run_again(sdata, ifmgd->probe_timeout); 3148 } 3149 3150 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3151 bool beacon) 3152 { 3153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3154 bool already = false; 3155 3156 if (WARN_ON(sdata->vif.valid_links)) 3157 return; 3158 3159 if (!ieee80211_sdata_running(sdata)) 3160 return; 3161 3162 sdata_lock(sdata); 3163 3164 if (!ifmgd->associated) 3165 goto out; 3166 3167 mutex_lock(&sdata->local->mtx); 3168 3169 if (sdata->local->tmp_channel || sdata->local->scanning) { 3170 mutex_unlock(&sdata->local->mtx); 3171 goto out; 3172 } 3173 3174 if (sdata->local->suspending) { 3175 /* reschedule after resume */ 3176 mutex_unlock(&sdata->local->mtx); 3177 ieee80211_reset_ap_probe(sdata); 3178 goto out; 3179 } 3180 3181 if (beacon) { 3182 mlme_dbg_ratelimited(sdata, 3183 "detected beacon loss from AP (missed %d beacons) - probing\n", 3184 beacon_loss_count); 3185 3186 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3187 } 3188 3189 /* 3190 * The driver/our work has already reported this event or the 3191 * connection monitoring has kicked in and we have already sent 3192 * a probe request. Or maybe the AP died and the driver keeps 3193 * reporting until we disassociate... 3194 * 3195 * In either case we have to ignore the current call to this 3196 * function (except for setting the correct probe reason bit) 3197 * because otherwise we would reset the timer every time and 3198 * never check whether we received a probe response! 3199 */ 3200 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3201 already = true; 3202 3203 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3204 3205 mutex_unlock(&sdata->local->mtx); 3206 3207 if (already) 3208 goto out; 3209 3210 mutex_lock(&sdata->local->iflist_mtx); 3211 ieee80211_recalc_ps(sdata->local); 3212 mutex_unlock(&sdata->local->iflist_mtx); 3213 3214 ifmgd->probe_send_count = 0; 3215 ieee80211_mgd_probe_ap_send(sdata); 3216 out: 3217 sdata_unlock(sdata); 3218 } 3219 3220 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3221 struct ieee80211_vif *vif) 3222 { 3223 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3225 struct cfg80211_bss *cbss; 3226 struct sk_buff *skb; 3227 const struct element *ssid; 3228 int ssid_len; 3229 3230 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3231 sdata->vif.valid_links)) 3232 return NULL; 3233 3234 sdata_assert_lock(sdata); 3235 3236 if (ifmgd->associated) 3237 cbss = sdata->deflink.u.mgd.bss; 3238 else if (ifmgd->auth_data) 3239 cbss = ifmgd->auth_data->bss; 3240 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3241 cbss = ifmgd->assoc_data->link[0].bss; 3242 else 3243 return NULL; 3244 3245 rcu_read_lock(); 3246 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3247 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3248 "invalid SSID element (len=%d)", 3249 ssid ? ssid->datalen : -1)) 3250 ssid_len = 0; 3251 else 3252 ssid_len = ssid->datalen; 3253 3254 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3255 (u32) -1, cbss->channel, 3256 ssid->data, ssid_len, 3257 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3258 rcu_read_unlock(); 3259 3260 return skb; 3261 } 3262 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3263 3264 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3265 const u8 *buf, size_t len, bool tx, 3266 u16 reason, bool reconnect) 3267 { 3268 struct ieee80211_event event = { 3269 .type = MLME_EVENT, 3270 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3271 .u.mlme.reason = reason, 3272 }; 3273 3274 if (tx) 3275 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3276 else 3277 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3278 3279 drv_event_callback(sdata->local, sdata, &event); 3280 } 3281 3282 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3283 { 3284 struct ieee80211_local *local = sdata->local; 3285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3286 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3287 bool tx; 3288 3289 sdata_lock(sdata); 3290 if (!ifmgd->associated) { 3291 sdata_unlock(sdata); 3292 return; 3293 } 3294 3295 /* in MLO assume we have a link where we can TX the frame */ 3296 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3297 3298 if (!ifmgd->driver_disconnect) { 3299 unsigned int link_id; 3300 3301 /* 3302 * AP is probably out of range (or not reachable for another 3303 * reason) so remove the bss structs for that AP. In the case 3304 * of multi-link, it's not clear that all of them really are 3305 * out of range, but if they weren't the driver likely would 3306 * have switched to just have a single link active? 3307 */ 3308 for (link_id = 0; 3309 link_id < ARRAY_SIZE(sdata->link); 3310 link_id++) { 3311 struct ieee80211_link_data *link; 3312 3313 link = sdata_dereference(sdata->link[link_id], sdata); 3314 if (!link) 3315 continue; 3316 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3317 link->u.mgd.bss = NULL; 3318 } 3319 } 3320 3321 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3322 ifmgd->driver_disconnect ? 3323 WLAN_REASON_DEAUTH_LEAVING : 3324 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3325 tx, frame_buf); 3326 mutex_lock(&local->mtx); 3327 /* the other links will be destroyed */ 3328 sdata->vif.bss_conf.csa_active = false; 3329 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3330 if (sdata->deflink.csa_block_tx) { 3331 ieee80211_wake_vif_queues(local, sdata, 3332 IEEE80211_QUEUE_STOP_REASON_CSA); 3333 sdata->deflink.csa_block_tx = false; 3334 } 3335 mutex_unlock(&local->mtx); 3336 3337 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3338 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3339 ifmgd->reconnect); 3340 ifmgd->reconnect = false; 3341 3342 sdata_unlock(sdata); 3343 } 3344 3345 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3346 { 3347 struct ieee80211_sub_if_data *sdata = 3348 container_of(work, struct ieee80211_sub_if_data, 3349 u.mgd.beacon_connection_loss_work); 3350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3351 3352 if (ifmgd->connection_loss) { 3353 sdata_info(sdata, "Connection to AP %pM lost\n", 3354 sdata->vif.cfg.ap_addr); 3355 __ieee80211_disconnect(sdata); 3356 ifmgd->connection_loss = false; 3357 } else if (ifmgd->driver_disconnect) { 3358 sdata_info(sdata, 3359 "Driver requested disconnection from AP %pM\n", 3360 sdata->vif.cfg.ap_addr); 3361 __ieee80211_disconnect(sdata); 3362 ifmgd->driver_disconnect = false; 3363 } else { 3364 if (ifmgd->associated) 3365 sdata->deflink.u.mgd.beacon_loss_count++; 3366 ieee80211_mgd_probe_ap(sdata, true); 3367 } 3368 } 3369 3370 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3371 { 3372 struct ieee80211_sub_if_data *sdata = 3373 container_of(work, struct ieee80211_sub_if_data, 3374 u.mgd.csa_connection_drop_work); 3375 3376 __ieee80211_disconnect(sdata); 3377 } 3378 3379 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3380 { 3381 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3382 struct ieee80211_hw *hw = &sdata->local->hw; 3383 3384 trace_api_beacon_loss(sdata); 3385 3386 sdata->u.mgd.connection_loss = false; 3387 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3388 } 3389 EXPORT_SYMBOL(ieee80211_beacon_loss); 3390 3391 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3392 { 3393 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3394 struct ieee80211_hw *hw = &sdata->local->hw; 3395 3396 trace_api_connection_loss(sdata); 3397 3398 sdata->u.mgd.connection_loss = true; 3399 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3400 } 3401 EXPORT_SYMBOL(ieee80211_connection_loss); 3402 3403 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3404 { 3405 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3406 struct ieee80211_hw *hw = &sdata->local->hw; 3407 3408 trace_api_disconnect(sdata, reconnect); 3409 3410 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3411 return; 3412 3413 sdata->u.mgd.driver_disconnect = true; 3414 sdata->u.mgd.reconnect = reconnect; 3415 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3416 } 3417 EXPORT_SYMBOL(ieee80211_disconnect); 3418 3419 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3420 bool assoc) 3421 { 3422 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3423 3424 sdata_assert_lock(sdata); 3425 3426 if (!assoc) { 3427 /* 3428 * we are not authenticated yet, the only timer that could be 3429 * running is the timeout for the authentication response which 3430 * which is not relevant anymore. 3431 */ 3432 del_timer_sync(&sdata->u.mgd.timer); 3433 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3434 3435 /* other links are destroyed */ 3436 sdata->deflink.u.mgd.conn_flags = 0; 3437 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3438 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3439 BSS_CHANGED_BSSID); 3440 sdata->u.mgd.flags = 0; 3441 3442 mutex_lock(&sdata->local->mtx); 3443 ieee80211_link_release_channel(&sdata->deflink); 3444 ieee80211_vif_set_links(sdata, 0); 3445 mutex_unlock(&sdata->local->mtx); 3446 } 3447 3448 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3449 kfree(auth_data); 3450 sdata->u.mgd.auth_data = NULL; 3451 } 3452 3453 enum assoc_status { 3454 ASSOC_SUCCESS, 3455 ASSOC_REJECTED, 3456 ASSOC_TIMEOUT, 3457 ASSOC_ABANDON, 3458 }; 3459 3460 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3461 enum assoc_status status) 3462 { 3463 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3464 3465 sdata_assert_lock(sdata); 3466 3467 if (status != ASSOC_SUCCESS) { 3468 /* 3469 * we are not associated yet, the only timer that could be 3470 * running is the timeout for the association response which 3471 * which is not relevant anymore. 3472 */ 3473 del_timer_sync(&sdata->u.mgd.timer); 3474 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3475 3476 sdata->deflink.u.mgd.conn_flags = 0; 3477 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3478 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3479 BSS_CHANGED_BSSID); 3480 sdata->u.mgd.flags = 0; 3481 sdata->vif.bss_conf.mu_mimo_owner = false; 3482 3483 if (status != ASSOC_REJECTED) { 3484 struct cfg80211_assoc_failure data = { 3485 .timeout = status == ASSOC_TIMEOUT, 3486 }; 3487 int i; 3488 3489 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3490 ARRAY_SIZE(assoc_data->link)); 3491 3492 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3493 data.bss[i] = assoc_data->link[i].bss; 3494 3495 if (sdata->vif.valid_links) 3496 data.ap_mld_addr = assoc_data->ap_addr; 3497 3498 cfg80211_assoc_failure(sdata->dev, &data); 3499 } 3500 3501 mutex_lock(&sdata->local->mtx); 3502 ieee80211_link_release_channel(&sdata->deflink); 3503 ieee80211_vif_set_links(sdata, 0); 3504 mutex_unlock(&sdata->local->mtx); 3505 } 3506 3507 kfree(assoc_data); 3508 sdata->u.mgd.assoc_data = NULL; 3509 } 3510 3511 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3512 struct ieee80211_mgmt *mgmt, size_t len) 3513 { 3514 struct ieee80211_local *local = sdata->local; 3515 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3516 const struct element *challenge; 3517 u8 *pos; 3518 u32 tx_flags = 0; 3519 struct ieee80211_prep_tx_info info = { 3520 .subtype = IEEE80211_STYPE_AUTH, 3521 }; 3522 3523 pos = mgmt->u.auth.variable; 3524 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3525 len - (pos - (u8 *)mgmt)); 3526 if (!challenge) 3527 return; 3528 auth_data->expected_transaction = 4; 3529 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3530 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3531 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3532 IEEE80211_TX_INTFL_MLME_CONN_TX; 3533 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3534 (void *)challenge, 3535 challenge->datalen + sizeof(*challenge), 3536 auth_data->ap_addr, auth_data->ap_addr, 3537 auth_data->key, auth_data->key_len, 3538 auth_data->key_idx, tx_flags); 3539 } 3540 3541 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3542 { 3543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3544 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3545 struct sta_info *sta; 3546 bool result = true; 3547 3548 sdata_info(sdata, "authenticated\n"); 3549 ifmgd->auth_data->done = true; 3550 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3551 ifmgd->auth_data->timeout_started = true; 3552 run_again(sdata, ifmgd->auth_data->timeout); 3553 3554 /* move station state to auth */ 3555 mutex_lock(&sdata->local->sta_mtx); 3556 sta = sta_info_get(sdata, ap_addr); 3557 if (!sta) { 3558 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3559 result = false; 3560 goto out; 3561 } 3562 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3563 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3564 result = false; 3565 goto out; 3566 } 3567 3568 out: 3569 mutex_unlock(&sdata->local->sta_mtx); 3570 return result; 3571 } 3572 3573 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3574 struct ieee80211_mgmt *mgmt, size_t len) 3575 { 3576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3577 u16 auth_alg, auth_transaction, status_code; 3578 struct ieee80211_event event = { 3579 .type = MLME_EVENT, 3580 .u.mlme.data = AUTH_EVENT, 3581 }; 3582 struct ieee80211_prep_tx_info info = { 3583 .subtype = IEEE80211_STYPE_AUTH, 3584 }; 3585 3586 sdata_assert_lock(sdata); 3587 3588 if (len < 24 + 6) 3589 return; 3590 3591 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3592 return; 3593 3594 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3595 return; 3596 3597 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3598 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3599 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3600 3601 if (auth_alg != ifmgd->auth_data->algorithm || 3602 (auth_alg != WLAN_AUTH_SAE && 3603 auth_transaction != ifmgd->auth_data->expected_transaction) || 3604 (auth_alg == WLAN_AUTH_SAE && 3605 (auth_transaction < ifmgd->auth_data->expected_transaction || 3606 auth_transaction > 2))) { 3607 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3608 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3609 auth_transaction, 3610 ifmgd->auth_data->expected_transaction); 3611 goto notify_driver; 3612 } 3613 3614 if (status_code != WLAN_STATUS_SUCCESS) { 3615 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3616 3617 if (auth_alg == WLAN_AUTH_SAE && 3618 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3619 (auth_transaction == 1 && 3620 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3621 status_code == WLAN_STATUS_SAE_PK)))) { 3622 /* waiting for userspace now */ 3623 ifmgd->auth_data->waiting = true; 3624 ifmgd->auth_data->timeout = 3625 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3626 ifmgd->auth_data->timeout_started = true; 3627 run_again(sdata, ifmgd->auth_data->timeout); 3628 goto notify_driver; 3629 } 3630 3631 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3632 mgmt->sa, status_code); 3633 ieee80211_destroy_auth_data(sdata, false); 3634 event.u.mlme.status = MLME_DENIED; 3635 event.u.mlme.reason = status_code; 3636 drv_event_callback(sdata->local, sdata, &event); 3637 goto notify_driver; 3638 } 3639 3640 switch (ifmgd->auth_data->algorithm) { 3641 case WLAN_AUTH_OPEN: 3642 case WLAN_AUTH_LEAP: 3643 case WLAN_AUTH_FT: 3644 case WLAN_AUTH_SAE: 3645 case WLAN_AUTH_FILS_SK: 3646 case WLAN_AUTH_FILS_SK_PFS: 3647 case WLAN_AUTH_FILS_PK: 3648 break; 3649 case WLAN_AUTH_SHARED_KEY: 3650 if (ifmgd->auth_data->expected_transaction != 4) { 3651 ieee80211_auth_challenge(sdata, mgmt, len); 3652 /* need another frame */ 3653 return; 3654 } 3655 break; 3656 default: 3657 WARN_ONCE(1, "invalid auth alg %d", 3658 ifmgd->auth_data->algorithm); 3659 goto notify_driver; 3660 } 3661 3662 event.u.mlme.status = MLME_SUCCESS; 3663 info.success = 1; 3664 drv_event_callback(sdata->local, sdata, &event); 3665 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3666 (auth_transaction == 2 && 3667 ifmgd->auth_data->expected_transaction == 2)) { 3668 if (!ieee80211_mark_sta_auth(sdata)) 3669 return; /* ignore frame -- wait for timeout */ 3670 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3671 auth_transaction == 2) { 3672 sdata_info(sdata, "SAE peer confirmed\n"); 3673 ifmgd->auth_data->peer_confirmed = true; 3674 } 3675 3676 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3677 notify_driver: 3678 drv_mgd_complete_tx(sdata->local, sdata, &info); 3679 } 3680 3681 #define case_WLAN(type) \ 3682 case WLAN_REASON_##type: return #type 3683 3684 const char *ieee80211_get_reason_code_string(u16 reason_code) 3685 { 3686 switch (reason_code) { 3687 case_WLAN(UNSPECIFIED); 3688 case_WLAN(PREV_AUTH_NOT_VALID); 3689 case_WLAN(DEAUTH_LEAVING); 3690 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3691 case_WLAN(DISASSOC_AP_BUSY); 3692 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3693 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3694 case_WLAN(DISASSOC_STA_HAS_LEFT); 3695 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3696 case_WLAN(DISASSOC_BAD_POWER); 3697 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3698 case_WLAN(INVALID_IE); 3699 case_WLAN(MIC_FAILURE); 3700 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3701 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3702 case_WLAN(IE_DIFFERENT); 3703 case_WLAN(INVALID_GROUP_CIPHER); 3704 case_WLAN(INVALID_PAIRWISE_CIPHER); 3705 case_WLAN(INVALID_AKMP); 3706 case_WLAN(UNSUPP_RSN_VERSION); 3707 case_WLAN(INVALID_RSN_IE_CAP); 3708 case_WLAN(IEEE8021X_FAILED); 3709 case_WLAN(CIPHER_SUITE_REJECTED); 3710 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3711 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3712 case_WLAN(DISASSOC_LOW_ACK); 3713 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3714 case_WLAN(QSTA_LEAVE_QBSS); 3715 case_WLAN(QSTA_NOT_USE); 3716 case_WLAN(QSTA_REQUIRE_SETUP); 3717 case_WLAN(QSTA_TIMEOUT); 3718 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3719 case_WLAN(MESH_PEER_CANCELED); 3720 case_WLAN(MESH_MAX_PEERS); 3721 case_WLAN(MESH_CONFIG); 3722 case_WLAN(MESH_CLOSE); 3723 case_WLAN(MESH_MAX_RETRIES); 3724 case_WLAN(MESH_CONFIRM_TIMEOUT); 3725 case_WLAN(MESH_INVALID_GTK); 3726 case_WLAN(MESH_INCONSISTENT_PARAM); 3727 case_WLAN(MESH_INVALID_SECURITY); 3728 case_WLAN(MESH_PATH_ERROR); 3729 case_WLAN(MESH_PATH_NOFORWARD); 3730 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3731 case_WLAN(MAC_EXISTS_IN_MBSS); 3732 case_WLAN(MESH_CHAN_REGULATORY); 3733 case_WLAN(MESH_CHAN); 3734 default: return "<unknown>"; 3735 } 3736 } 3737 3738 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3739 struct ieee80211_mgmt *mgmt, size_t len) 3740 { 3741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3742 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3743 3744 sdata_assert_lock(sdata); 3745 3746 if (len < 24 + 2) 3747 return; 3748 3749 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3750 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3751 return; 3752 } 3753 3754 if (ifmgd->associated && 3755 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3756 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3757 sdata->vif.cfg.ap_addr, reason_code, 3758 ieee80211_get_reason_code_string(reason_code)); 3759 3760 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3761 3762 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3763 reason_code, false); 3764 return; 3765 } 3766 3767 if (ifmgd->assoc_data && 3768 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3769 sdata_info(sdata, 3770 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3771 ifmgd->assoc_data->ap_addr, reason_code, 3772 ieee80211_get_reason_code_string(reason_code)); 3773 3774 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3775 3776 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3777 return; 3778 } 3779 } 3780 3781 3782 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3783 struct ieee80211_mgmt *mgmt, size_t len) 3784 { 3785 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3786 u16 reason_code; 3787 3788 sdata_assert_lock(sdata); 3789 3790 if (len < 24 + 2) 3791 return; 3792 3793 if (!ifmgd->associated || 3794 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3795 return; 3796 3797 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3798 3799 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3800 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3801 return; 3802 } 3803 3804 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3805 sdata->vif.cfg.ap_addr, reason_code, 3806 ieee80211_get_reason_code_string(reason_code)); 3807 3808 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3809 3810 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3811 false); 3812 } 3813 3814 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3815 u8 *supp_rates, unsigned int supp_rates_len, 3816 u32 *rates, u32 *basic_rates, 3817 bool *have_higher_than_11mbit, 3818 int *min_rate, int *min_rate_index, 3819 int shift) 3820 { 3821 int i, j; 3822 3823 for (i = 0; i < supp_rates_len; i++) { 3824 int rate = supp_rates[i] & 0x7f; 3825 bool is_basic = !!(supp_rates[i] & 0x80); 3826 3827 if ((rate * 5 * (1 << shift)) > 110) 3828 *have_higher_than_11mbit = true; 3829 3830 /* 3831 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3832 * since they're not rates. 3833 * 3834 * Note: Even though the membership selector and the basic 3835 * rate flag share the same bit, they are not exactly 3836 * the same. 3837 */ 3838 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3839 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3840 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3841 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3842 continue; 3843 3844 for (j = 0; j < sband->n_bitrates; j++) { 3845 struct ieee80211_rate *br; 3846 int brate; 3847 3848 br = &sband->bitrates[j]; 3849 3850 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3851 if (brate == rate) { 3852 *rates |= BIT(j); 3853 if (is_basic) 3854 *basic_rates |= BIT(j); 3855 if ((rate * 5) < *min_rate) { 3856 *min_rate = rate * 5; 3857 *min_rate_index = j; 3858 } 3859 break; 3860 } 3861 } 3862 } 3863 } 3864 3865 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 3866 struct ieee80211_supported_band *sband, 3867 const struct link_sta_info *link_sta, 3868 const struct ieee802_11_elems *elems) 3869 { 3870 const struct ieee80211_sta_he_cap *own_he_cap = 3871 ieee80211_get_he_iftype_cap(sband, 3872 ieee80211_vif_type_p2p(&sdata->vif)); 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 own_he_cap && 3883 (own_he_cap->he_cap_elem.mac_cap_info[0] & 3884 IEEE80211_HE_MAC_CAP0_TWT_REQ); 3885 } 3886 3887 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3888 struct ieee80211_supported_band *sband, 3889 struct ieee80211_link_data *link, 3890 struct link_sta_info *link_sta, 3891 struct ieee802_11_elems *elems) 3892 { 3893 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 3894 3895 if (link->conf->twt_requester != twt) { 3896 link->conf->twt_requester = twt; 3897 return BSS_CHANGED_TWT; 3898 } 3899 return 0; 3900 } 3901 3902 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3903 struct ieee80211_bss_conf *bss_conf, 3904 struct ieee80211_supported_band *sband, 3905 struct link_sta_info *link_sta) 3906 { 3907 const struct ieee80211_sta_he_cap *own_he_cap = 3908 ieee80211_get_he_iftype_cap(sband, 3909 ieee80211_vif_type_p2p(&sdata->vif)); 3910 3911 return bss_conf->he_support && 3912 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3913 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3914 own_he_cap && 3915 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3916 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3917 } 3918 3919 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3920 struct link_sta_info *link_sta, 3921 struct cfg80211_bss *cbss, 3922 struct ieee80211_mgmt *mgmt, 3923 const u8 *elem_start, 3924 unsigned int elem_len, 3925 u64 *changed) 3926 { 3927 struct ieee80211_sub_if_data *sdata = link->sdata; 3928 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3929 struct ieee80211_bss_conf *bss_conf = link->conf; 3930 struct ieee80211_local *local = sdata->local; 3931 unsigned int link_id = link->link_id; 3932 struct ieee80211_elems_parse_params parse_params = { 3933 .start = elem_start, 3934 .len = elem_len, 3935 .bss = cbss, 3936 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 3937 .from_ap = true, 3938 }; 3939 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3940 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3941 const struct cfg80211_bss_ies *bss_ies = NULL; 3942 struct ieee80211_supported_band *sband; 3943 struct ieee802_11_elems *elems; 3944 u16 capab_info; 3945 bool ret; 3946 3947 elems = ieee802_11_parse_elems_full(&parse_params); 3948 if (!elems) 3949 return false; 3950 3951 if (link_id == assoc_data->assoc_link_id) { 3952 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3953 3954 /* 3955 * we should not get to this flow unless the association was 3956 * successful, so set the status directly to success 3957 */ 3958 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 3959 } else if (!elems->prof) { 3960 ret = false; 3961 goto out; 3962 } else { 3963 const u8 *ptr = elems->prof->variable + 3964 elems->prof->sta_info_len - 1; 3965 3966 /* 3967 * During parsing, we validated that these fields exist, 3968 * otherwise elems->prof would have been set to NULL. 3969 */ 3970 capab_info = get_unaligned_le16(ptr); 3971 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 3972 3973 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 3974 link_info(link, "association response status code=%u\n", 3975 assoc_data->link[link_id].status); 3976 ret = true; 3977 goto out; 3978 } 3979 } 3980 3981 if (!is_s1g && !elems->supp_rates) { 3982 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3983 ret = false; 3984 goto out; 3985 } 3986 3987 link->u.mgd.tdls_chan_switch_prohibited = 3988 elems->ext_capab && elems->ext_capab_len >= 5 && 3989 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3990 3991 /* 3992 * Some APs are erroneously not including some information in their 3993 * (re)association response frames. Try to recover by using the data 3994 * from the beacon or probe response. This seems to afflict mobile 3995 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3996 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3997 */ 3998 if (!is_6ghz && 3999 ((assoc_data->wmm && !elems->wmm_param) || 4000 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4001 (!elems->ht_cap_elem || !elems->ht_operation)) || 4002 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4003 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4004 const struct cfg80211_bss_ies *ies; 4005 struct ieee802_11_elems *bss_elems; 4006 4007 rcu_read_lock(); 4008 ies = rcu_dereference(cbss->ies); 4009 if (ies) 4010 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4011 GFP_ATOMIC); 4012 rcu_read_unlock(); 4013 if (!bss_ies) { 4014 ret = false; 4015 goto out; 4016 } 4017 4018 parse_params.start = bss_ies->data; 4019 parse_params.len = bss_ies->len; 4020 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4021 if (!bss_elems) { 4022 ret = false; 4023 goto out; 4024 } 4025 4026 if (assoc_data->wmm && 4027 !elems->wmm_param && bss_elems->wmm_param) { 4028 elems->wmm_param = bss_elems->wmm_param; 4029 sdata_info(sdata, 4030 "AP bug: WMM param missing from AssocResp\n"); 4031 } 4032 4033 /* 4034 * Also check if we requested HT/VHT, otherwise the AP doesn't 4035 * have to include the IEs in the (re)association response. 4036 */ 4037 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4038 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4039 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4040 sdata_info(sdata, 4041 "AP bug: HT capability missing from AssocResp\n"); 4042 } 4043 if (!elems->ht_operation && bss_elems->ht_operation && 4044 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4045 elems->ht_operation = bss_elems->ht_operation; 4046 sdata_info(sdata, 4047 "AP bug: HT operation missing from AssocResp\n"); 4048 } 4049 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4050 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4051 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4052 sdata_info(sdata, 4053 "AP bug: VHT capa missing from AssocResp\n"); 4054 } 4055 if (!elems->vht_operation && bss_elems->vht_operation && 4056 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4057 elems->vht_operation = bss_elems->vht_operation; 4058 sdata_info(sdata, 4059 "AP bug: VHT operation missing from AssocResp\n"); 4060 } 4061 4062 kfree(bss_elems); 4063 } 4064 4065 /* 4066 * We previously checked these in the beacon/probe response, so 4067 * they should be present here. This is just a safety net. 4068 */ 4069 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4070 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4071 sdata_info(sdata, 4072 "HT AP is missing WMM params or HT capability/operation\n"); 4073 ret = false; 4074 goto out; 4075 } 4076 4077 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4078 (!elems->vht_cap_elem || !elems->vht_operation)) { 4079 sdata_info(sdata, 4080 "VHT AP is missing VHT capability/operation\n"); 4081 ret = false; 4082 goto out; 4083 } 4084 4085 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4086 !elems->he_6ghz_capa) { 4087 sdata_info(sdata, 4088 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4089 ret = false; 4090 goto out; 4091 } 4092 4093 if (WARN_ON(!link->conf->chandef.chan)) { 4094 ret = false; 4095 goto out; 4096 } 4097 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 4098 4099 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4100 (!elems->he_cap || !elems->he_operation)) { 4101 sdata_info(sdata, 4102 "HE AP is missing HE capability/operation\n"); 4103 ret = false; 4104 goto out; 4105 } 4106 4107 /* Set up internal HT/VHT capabilities */ 4108 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4109 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4110 elems->ht_cap_elem, 4111 link_sta); 4112 4113 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4114 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4115 elems->vht_cap_elem, 4116 link_sta); 4117 4118 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4119 elems->he_cap) { 4120 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4121 elems->he_cap, 4122 elems->he_cap_len, 4123 elems->he_6ghz_capa, 4124 link_sta); 4125 4126 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4127 if (elems->rsnx && elems->rsnx_len && 4128 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4129 wiphy_ext_feature_isset(local->hw.wiphy, 4130 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4131 bss_conf->twt_protected = true; 4132 else 4133 bss_conf->twt_protected = false; 4134 4135 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4136 link_sta, elems); 4137 4138 if (elems->eht_operation && elems->eht_cap && 4139 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4140 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4141 elems->he_cap, 4142 elems->he_cap_len, 4143 elems->eht_cap, 4144 elems->eht_cap_len, 4145 link_sta); 4146 4147 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4148 } else { 4149 bss_conf->eht_support = false; 4150 } 4151 } else { 4152 bss_conf->he_support = false; 4153 bss_conf->twt_requester = false; 4154 bss_conf->twt_protected = false; 4155 bss_conf->eht_support = false; 4156 } 4157 4158 bss_conf->twt_broadcast = 4159 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4160 4161 if (bss_conf->he_support) { 4162 bss_conf->he_bss_color.color = 4163 le32_get_bits(elems->he_operation->he_oper_params, 4164 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4165 bss_conf->he_bss_color.partial = 4166 le32_get_bits(elems->he_operation->he_oper_params, 4167 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4168 bss_conf->he_bss_color.enabled = 4169 !le32_get_bits(elems->he_operation->he_oper_params, 4170 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4171 4172 if (bss_conf->he_bss_color.enabled) 4173 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4174 4175 bss_conf->htc_trig_based_pkt_ext = 4176 le32_get_bits(elems->he_operation->he_oper_params, 4177 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4178 bss_conf->frame_time_rts_th = 4179 le32_get_bits(elems->he_operation->he_oper_params, 4180 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4181 4182 bss_conf->uora_exists = !!elems->uora_element; 4183 if (elems->uora_element) 4184 bss_conf->uora_ocw_range = elems->uora_element[0]; 4185 4186 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4187 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4188 /* TODO: OPEN: what happens if BSS color disable is set? */ 4189 } 4190 4191 if (cbss->transmitted_bss) { 4192 bss_conf->nontransmitted = true; 4193 ether_addr_copy(bss_conf->transmitter_bssid, 4194 cbss->transmitted_bss->bssid); 4195 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4196 bss_conf->bssid_index = cbss->bssid_index; 4197 } 4198 4199 /* 4200 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4201 * in their association response, so ignore that data for our own 4202 * configuration. If it changed since the last beacon, we'll get the 4203 * next beacon and update then. 4204 */ 4205 4206 /* 4207 * If an operating mode notification IE is present, override the 4208 * NSS calculation (that would be done in rate_control_rate_init()) 4209 * and use the # of streams from that element. 4210 */ 4211 if (elems->opmode_notif && 4212 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4213 u8 nss; 4214 4215 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4216 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4217 nss += 1; 4218 link_sta->pub->rx_nss = nss; 4219 } 4220 4221 /* 4222 * Always handle WMM once after association regardless 4223 * of the first value the AP uses. Setting -1 here has 4224 * that effect because the AP values is an unsigned 4225 * 4-bit value. 4226 */ 4227 link->u.mgd.wmm_last_param_set = -1; 4228 link->u.mgd.mu_edca_last_param_set = -1; 4229 4230 if (link->u.mgd.disable_wmm_tracking) { 4231 ieee80211_set_wmm_default(link, false, false); 4232 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4233 elems->wmm_param_len, 4234 elems->mu_edca_param_set)) { 4235 /* still enable QoS since we might have HT/VHT */ 4236 ieee80211_set_wmm_default(link, false, true); 4237 /* disable WMM tracking in this case to disable 4238 * tracking WMM parameter changes in the beacon if 4239 * the parameters weren't actually valid. Doing so 4240 * avoids changing parameters very strangely when 4241 * the AP is going back and forth between valid and 4242 * invalid parameters. 4243 */ 4244 link->u.mgd.disable_wmm_tracking = true; 4245 } 4246 4247 if (elems->max_idle_period_ie) { 4248 bss_conf->max_idle_period = 4249 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4250 bss_conf->protected_keep_alive = 4251 !!(elems->max_idle_period_ie->idle_options & 4252 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4253 *changed |= BSS_CHANGED_KEEP_ALIVE; 4254 } else { 4255 bss_conf->max_idle_period = 0; 4256 bss_conf->protected_keep_alive = false; 4257 } 4258 4259 /* set assoc capability (AID was already set earlier), 4260 * ieee80211_set_associated() will tell the driver */ 4261 bss_conf->assoc_capability = capab_info; 4262 4263 ret = true; 4264 out: 4265 kfree(elems); 4266 kfree(bss_ies); 4267 return ret; 4268 } 4269 4270 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4271 struct sta_info *sta, 4272 struct link_sta_info *link_sta, 4273 struct cfg80211_bss *cbss) 4274 { 4275 struct ieee80211_sub_if_data *sdata = link->sdata; 4276 struct ieee80211_local *local = sdata->local; 4277 struct ieee80211_bss *bss = (void *)cbss->priv; 4278 u32 rates = 0, basic_rates = 0; 4279 bool have_higher_than_11mbit = false; 4280 int min_rate = INT_MAX, min_rate_index = -1; 4281 /* this is clearly wrong for MLO but we'll just remove it later */ 4282 int shift = ieee80211_vif_get_shift(&sdata->vif); 4283 struct ieee80211_supported_band *sband; 4284 4285 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4286 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4287 4288 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4289 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4290 ieee80211_s1g_sta_rate_init(sta); 4291 return 0; 4292 } 4293 4294 sband = local->hw.wiphy->bands[cbss->channel->band]; 4295 4296 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4297 &rates, &basic_rates, &have_higher_than_11mbit, 4298 &min_rate, &min_rate_index, shift); 4299 4300 /* 4301 * This used to be a workaround for basic rates missing 4302 * in the association response frame. Now that we no 4303 * longer use the basic rates from there, it probably 4304 * doesn't happen any more, but keep the workaround so 4305 * in case some *other* APs are buggy in different ways 4306 * we can connect -- with a warning. 4307 * Allow this workaround only in case the AP provided at least 4308 * one rate. 4309 */ 4310 if (min_rate_index < 0) { 4311 link_info(link, "No legacy rates in association response\n"); 4312 return -EINVAL; 4313 } else if (!basic_rates) { 4314 link_info(link, "No basic rates, using min rate instead\n"); 4315 basic_rates = BIT(min_rate_index); 4316 } 4317 4318 if (rates) 4319 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4320 else 4321 link_info(link, "No rates found, keeping mandatory only\n"); 4322 4323 link->conf->basic_rates = basic_rates; 4324 4325 /* cf. IEEE 802.11 9.2.12 */ 4326 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4327 have_higher_than_11mbit; 4328 4329 return 0; 4330 } 4331 4332 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4333 struct cfg80211_bss *cbss) 4334 { 4335 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4336 const struct element *ht_cap_elem, *vht_cap_elem; 4337 const struct cfg80211_bss_ies *ies; 4338 const struct ieee80211_ht_cap *ht_cap; 4339 const struct ieee80211_vht_cap *vht_cap; 4340 const struct ieee80211_he_cap_elem *he_cap; 4341 const struct element *he_cap_elem; 4342 u16 mcs_80_map, mcs_160_map; 4343 int i, mcs_nss_size; 4344 bool support_160; 4345 u8 chains = 1; 4346 4347 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4348 return chains; 4349 4350 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4351 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4352 ht_cap = (void *)ht_cap_elem->data; 4353 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4354 /* 4355 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4356 * "Tx Unequal Modulation Supported" fields. 4357 */ 4358 } 4359 4360 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4361 return chains; 4362 4363 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4364 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4365 u8 nss; 4366 u16 tx_mcs_map; 4367 4368 vht_cap = (void *)vht_cap_elem->data; 4369 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4370 for (nss = 8; nss > 0; nss--) { 4371 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4372 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4373 break; 4374 } 4375 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4376 chains = max(chains, nss); 4377 } 4378 4379 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4380 return chains; 4381 4382 ies = rcu_dereference(cbss->ies); 4383 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4384 ies->data, ies->len); 4385 4386 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4387 return chains; 4388 4389 /* skip one byte ext_tag_id */ 4390 he_cap = (void *)(he_cap_elem->data + 1); 4391 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4392 4393 /* invalid HE IE */ 4394 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4395 return chains; 4396 4397 /* mcs_nss is right after he_cap info */ 4398 he_mcs_nss_supp = (void *)(he_cap + 1); 4399 4400 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4401 4402 for (i = 7; i >= 0; i--) { 4403 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4404 4405 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4406 chains = max_t(u8, chains, i + 1); 4407 break; 4408 } 4409 } 4410 4411 support_160 = he_cap->phy_cap_info[0] & 4412 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4413 4414 if (!support_160) 4415 return chains; 4416 4417 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4418 for (i = 7; i >= 0; i--) { 4419 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4420 4421 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4422 chains = max_t(u8, chains, i + 1); 4423 break; 4424 } 4425 } 4426 4427 return chains; 4428 } 4429 4430 static bool 4431 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4432 const struct cfg80211_bss_ies *ies, 4433 const struct ieee80211_he_operation *he_op) 4434 { 4435 const struct element *he_cap_elem; 4436 const struct ieee80211_he_cap_elem *he_cap; 4437 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4438 u16 mcs_80_map_tx, mcs_80_map_rx; 4439 u16 ap_min_req_set; 4440 int mcs_nss_size; 4441 int nss; 4442 4443 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4444 ies->data, ies->len); 4445 4446 if (!he_cap_elem) 4447 return false; 4448 4449 /* invalid HE IE */ 4450 if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4451 sdata_info(sdata, 4452 "Invalid HE elem, Disable HE\n"); 4453 return false; 4454 } 4455 4456 /* skip one byte ext_tag_id */ 4457 he_cap = (void *)(he_cap_elem->data + 1); 4458 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4459 4460 /* invalid HE IE */ 4461 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4462 sdata_info(sdata, 4463 "Invalid HE elem with nss size, Disable HE\n"); 4464 return false; 4465 } 4466 4467 /* mcs_nss is right after he_cap info */ 4468 he_mcs_nss_supp = (void *)(he_cap + 1); 4469 4470 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4471 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4472 4473 /* P802.11-REVme/D0.3 4474 * 27.1.1 Introduction to the HE PHY 4475 * ... 4476 * An HE STA shall support the following features: 4477 * ... 4478 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4479 * supported channel widths for HE SU PPDUs 4480 */ 4481 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4482 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4483 sdata_info(sdata, 4484 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4485 mcs_80_map_tx, mcs_80_map_rx); 4486 return false; 4487 } 4488 4489 if (!he_op) 4490 return true; 4491 4492 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4493 4494 /* 4495 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4496 * zeroes, which is nonsense, and completely inconsistent with itself 4497 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4498 */ 4499 if (!ap_min_req_set) 4500 return true; 4501 4502 /* make sure the AP is consistent with itself 4503 * 4504 * P802.11-REVme/D0.3 4505 * 26.17.1 Basic HE BSS operation 4506 * 4507 * A STA that is operating in an HE BSS shall be able to receive and 4508 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4509 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4510 * MLME-START.request primitive and shall be able to receive at each of 4511 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4512 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4513 * primitive 4514 */ 4515 for (nss = 8; nss > 0; nss--) { 4516 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4517 u8 ap_rx_val; 4518 u8 ap_tx_val; 4519 4520 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4521 continue; 4522 4523 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4524 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4525 4526 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4527 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4528 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4529 sdata_info(sdata, 4530 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4531 nss, ap_rx_val, ap_rx_val, ap_op_val); 4532 return false; 4533 } 4534 } 4535 4536 return true; 4537 } 4538 4539 static bool 4540 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4541 struct ieee80211_supported_band *sband, 4542 const struct ieee80211_he_operation *he_op) 4543 { 4544 const struct ieee80211_sta_he_cap *sta_he_cap = 4545 ieee80211_get_he_iftype_cap(sband, 4546 ieee80211_vif_type_p2p(&sdata->vif)); 4547 u16 ap_min_req_set; 4548 int i; 4549 4550 if (!sta_he_cap || !he_op) 4551 return false; 4552 4553 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4554 4555 /* 4556 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4557 * zeroes, which is nonsense, and completely inconsistent with itself 4558 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4559 */ 4560 if (!ap_min_req_set) 4561 return true; 4562 4563 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4564 for (i = 0; i < 3; i++) { 4565 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4566 &sta_he_cap->he_mcs_nss_supp; 4567 u16 sta_mcs_map_rx = 4568 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4569 u16 sta_mcs_map_tx = 4570 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4571 u8 nss; 4572 bool verified = true; 4573 4574 /* 4575 * For each band there is a maximum of 8 spatial streams 4576 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4577 * of 2 bits per NSS (1-8), with the values defined in enum 4578 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4579 * capabilities aren't less than the AP's minimum requirements 4580 * for this HE BSS per SS. 4581 * It is enough to find one such band that meets the reqs. 4582 */ 4583 for (nss = 8; nss > 0; nss--) { 4584 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4585 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4586 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4587 4588 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4589 continue; 4590 4591 /* 4592 * Make sure the HE AP doesn't require MCSs that aren't 4593 * supported by the client as required by spec 4594 * 4595 * P802.11-REVme/D0.3 4596 * 26.17.1 Basic HE BSS operation 4597 * 4598 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4599 * a BSS, unless it supports (i.e., is able to both transmit and 4600 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4601 * HE-MCS and NSS set. 4602 */ 4603 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4604 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4605 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4606 verified = false; 4607 break; 4608 } 4609 } 4610 4611 if (verified) 4612 return true; 4613 } 4614 4615 /* If here, STA doesn't meet AP's HE min requirements */ 4616 return false; 4617 } 4618 4619 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4620 struct ieee80211_link_data *link, 4621 struct cfg80211_bss *cbss, 4622 ieee80211_conn_flags_t *conn_flags) 4623 { 4624 struct ieee80211_local *local = sdata->local; 4625 const struct ieee80211_ht_cap *ht_cap = NULL; 4626 const struct ieee80211_ht_operation *ht_oper = NULL; 4627 const struct ieee80211_vht_operation *vht_oper = NULL; 4628 const struct ieee80211_he_operation *he_oper = NULL; 4629 const struct ieee80211_eht_operation *eht_oper = NULL; 4630 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4631 struct ieee80211_supported_band *sband; 4632 struct cfg80211_chan_def chandef; 4633 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4634 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4635 struct ieee80211_bss *bss = (void *)cbss->priv; 4636 struct ieee80211_elems_parse_params parse_params = { 4637 .bss = cbss, 4638 .link_id = -1, 4639 .from_ap = true, 4640 }; 4641 struct ieee802_11_elems *elems; 4642 const struct cfg80211_bss_ies *ies; 4643 int ret; 4644 u32 i; 4645 bool have_80mhz; 4646 4647 rcu_read_lock(); 4648 4649 ies = rcu_dereference(cbss->ies); 4650 parse_params.start = ies->data; 4651 parse_params.len = ies->len; 4652 elems = ieee802_11_parse_elems_full(&parse_params); 4653 if (!elems) { 4654 rcu_read_unlock(); 4655 return -ENOMEM; 4656 } 4657 4658 sband = local->hw.wiphy->bands[cbss->channel->band]; 4659 4660 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4661 IEEE80211_CONN_DISABLE_80P80MHZ | 4662 IEEE80211_CONN_DISABLE_160MHZ); 4663 4664 /* disable HT/VHT/HE if we don't support them */ 4665 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4666 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4667 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4668 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4669 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4670 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4671 } 4672 4673 if (!sband->vht_cap.vht_supported && is_5ghz) { 4674 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4675 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4676 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4677 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4678 } 4679 4680 if (!ieee80211_get_he_iftype_cap(sband, 4681 ieee80211_vif_type_p2p(&sdata->vif))) { 4682 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4683 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4684 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4685 } 4686 4687 if (!ieee80211_get_eht_iftype_cap(sband, 4688 ieee80211_vif_type_p2p(&sdata->vif))) { 4689 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4690 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4691 } 4692 4693 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4694 ht_oper = elems->ht_operation; 4695 ht_cap = elems->ht_cap_elem; 4696 4697 if (!ht_cap) { 4698 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4699 ht_oper = NULL; 4700 } 4701 } 4702 4703 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4704 vht_oper = elems->vht_operation; 4705 if (vht_oper && !ht_oper) { 4706 vht_oper = NULL; 4707 sdata_info(sdata, 4708 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4709 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4710 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4711 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4712 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4713 } 4714 4715 if (!elems->vht_cap_elem) { 4716 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4717 vht_oper = NULL; 4718 } 4719 } 4720 4721 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4722 he_oper = elems->he_operation; 4723 4724 if (link && is_6ghz) { 4725 struct ieee80211_bss_conf *bss_conf; 4726 u8 j = 0; 4727 4728 bss_conf = link->conf; 4729 4730 if (elems->pwr_constr_elem) 4731 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4732 4733 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4734 ARRAY_SIZE(elems->tx_pwr_env)); 4735 4736 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4737 if (elems->tx_pwr_env_len[i] > 4738 sizeof(bss_conf->tx_pwr_env[j])) 4739 continue; 4740 4741 bss_conf->tx_pwr_env_num++; 4742 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4743 elems->tx_pwr_env_len[i]); 4744 j++; 4745 } 4746 } 4747 4748 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4749 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4750 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4751 IEEE80211_CONN_DISABLE_EHT; 4752 } 4753 4754 /* 4755 * EHT requires HE to be supported as well. Specifically for 6 GHz 4756 * channels, the operation channel information can only be deduced from 4757 * both the 6 GHz operation information (from the HE operation IE) and 4758 * EHT operation. 4759 */ 4760 if (!(*conn_flags & 4761 (IEEE80211_CONN_DISABLE_HE | 4762 IEEE80211_CONN_DISABLE_EHT)) && 4763 he_oper) { 4764 const struct cfg80211_bss_ies *cbss_ies; 4765 const u8 *eht_oper_ie; 4766 4767 cbss_ies = rcu_dereference(cbss->ies); 4768 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4769 cbss_ies->data, cbss_ies->len); 4770 if (eht_oper_ie && eht_oper_ie[1] >= 4771 1 + sizeof(struct ieee80211_eht_operation)) 4772 eht_oper = (void *)(eht_oper_ie + 3); 4773 else 4774 eht_oper = NULL; 4775 } 4776 4777 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4778 have_80mhz = false; 4779 for (i = 0; i < sband->n_channels; i++) { 4780 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4781 IEEE80211_CHAN_NO_80MHZ)) 4782 continue; 4783 4784 have_80mhz = true; 4785 break; 4786 } 4787 4788 if (!have_80mhz) { 4789 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4790 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4791 } 4792 4793 if (sband->band == NL80211_BAND_S1GHZ) { 4794 s1g_oper = elems->s1g_oper; 4795 if (!s1g_oper) 4796 sdata_info(sdata, 4797 "AP missing S1G operation element?\n"); 4798 } 4799 4800 *conn_flags |= 4801 ieee80211_determine_chantype(sdata, link, *conn_flags, 4802 sband, 4803 cbss->channel, 4804 bss->vht_cap_info, 4805 ht_oper, vht_oper, 4806 he_oper, eht_oper, 4807 s1g_oper, 4808 &chandef, false); 4809 4810 if (link) 4811 link->needed_rx_chains = 4812 min(ieee80211_max_rx_chains(link, cbss), 4813 local->rx_chains); 4814 4815 rcu_read_unlock(); 4816 /* the element data was RCU protected so no longer valid anyway */ 4817 kfree(elems); 4818 elems = NULL; 4819 4820 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4821 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4822 return -EINVAL; 4823 } 4824 4825 if (!link) 4826 return 0; 4827 4828 /* will change later if needed */ 4829 link->smps_mode = IEEE80211_SMPS_OFF; 4830 4831 mutex_lock(&local->mtx); 4832 /* 4833 * If this fails (possibly due to channel context sharing 4834 * on incompatible channels, e.g. 80+80 and 160 sharing the 4835 * same control channel) try to use a smaller bandwidth. 4836 */ 4837 ret = ieee80211_link_use_channel(link, &chandef, 4838 IEEE80211_CHANCTX_SHARED); 4839 4840 /* don't downgrade for 5 and 10 MHz channels, though. */ 4841 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4842 chandef.width == NL80211_CHAN_WIDTH_10) 4843 goto out; 4844 4845 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4846 *conn_flags |= 4847 ieee80211_chandef_downgrade(&chandef); 4848 ret = ieee80211_link_use_channel(link, &chandef, 4849 IEEE80211_CHANCTX_SHARED); 4850 } 4851 out: 4852 mutex_unlock(&local->mtx); 4853 return ret; 4854 } 4855 4856 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4857 u8 *dtim_count, u8 *dtim_period) 4858 { 4859 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4860 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4861 ies->len); 4862 const struct ieee80211_tim_ie *tim = NULL; 4863 const struct ieee80211_bssid_index *idx; 4864 bool valid = tim_ie && tim_ie[1] >= 2; 4865 4866 if (valid) 4867 tim = (void *)(tim_ie + 2); 4868 4869 if (dtim_count) 4870 *dtim_count = valid ? tim->dtim_count : 0; 4871 4872 if (dtim_period) 4873 *dtim_period = valid ? tim->dtim_period : 0; 4874 4875 /* Check if value is overridden by non-transmitted profile */ 4876 if (!idx_ie || idx_ie[1] < 3) 4877 return valid; 4878 4879 idx = (void *)(idx_ie + 2); 4880 4881 if (dtim_count) 4882 *dtim_count = idx->dtim_count; 4883 4884 if (dtim_period) 4885 *dtim_period = idx->dtim_period; 4886 4887 return true; 4888 } 4889 4890 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4891 struct ieee80211_mgmt *mgmt, 4892 struct ieee802_11_elems *elems, 4893 const u8 *elem_start, unsigned int elem_len) 4894 { 4895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4896 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4897 struct ieee80211_local *local = sdata->local; 4898 unsigned int link_id; 4899 struct sta_info *sta; 4900 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4901 u16 valid_links = 0; 4902 int err; 4903 4904 mutex_lock(&sdata->local->sta_mtx); 4905 /* 4906 * station info was already allocated and inserted before 4907 * the association and should be available to us 4908 */ 4909 sta = sta_info_get(sdata, assoc_data->ap_addr); 4910 if (WARN_ON(!sta)) 4911 goto out_err; 4912 4913 if (sdata->vif.valid_links) { 4914 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4915 if (!assoc_data->link[link_id].bss) 4916 continue; 4917 valid_links |= BIT(link_id); 4918 4919 if (link_id != assoc_data->assoc_link_id) { 4920 err = ieee80211_sta_allocate_link(sta, link_id); 4921 if (err) 4922 goto out_err; 4923 } 4924 } 4925 4926 ieee80211_vif_set_links(sdata, valid_links); 4927 } 4928 4929 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4930 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4931 struct ieee80211_link_data *link; 4932 struct link_sta_info *link_sta; 4933 4934 if (!cbss) 4935 continue; 4936 4937 link = sdata_dereference(sdata->link[link_id], sdata); 4938 if (WARN_ON(!link)) 4939 goto out_err; 4940 4941 if (sdata->vif.valid_links) 4942 link_info(link, 4943 "local address %pM, AP link address %pM%s\n", 4944 link->conf->addr, 4945 assoc_data->link[link_id].bss->bssid, 4946 link_id == assoc_data->assoc_link_id ? 4947 " (assoc)" : ""); 4948 4949 link_sta = rcu_dereference_protected(sta->link[link_id], 4950 lockdep_is_held(&local->sta_mtx)); 4951 if (WARN_ON(!link_sta)) 4952 goto out_err; 4953 4954 if (!link->u.mgd.have_beacon) { 4955 const struct cfg80211_bss_ies *ies; 4956 4957 rcu_read_lock(); 4958 ies = rcu_dereference(cbss->beacon_ies); 4959 if (ies) 4960 link->u.mgd.have_beacon = true; 4961 else 4962 ies = rcu_dereference(cbss->ies); 4963 ieee80211_get_dtim(ies, 4964 &link->conf->sync_dtim_count, 4965 &link->u.mgd.dtim_period); 4966 link->conf->beacon_int = cbss->beacon_interval; 4967 rcu_read_unlock(); 4968 } 4969 4970 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 4971 4972 if (link_id != assoc_data->assoc_link_id) { 4973 err = ieee80211_prep_channel(sdata, link, cbss, 4974 &link->u.mgd.conn_flags); 4975 if (err) { 4976 link_info(link, "prep_channel failed\n"); 4977 goto out_err; 4978 } 4979 } 4980 4981 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 4982 assoc_data->link[link_id].bss); 4983 if (err) 4984 goto out_err; 4985 4986 if (!ieee80211_assoc_config_link(link, link_sta, 4987 assoc_data->link[link_id].bss, 4988 mgmt, elem_start, elem_len, 4989 &changed[link_id])) 4990 goto out_err; 4991 4992 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4993 valid_links &= ~BIT(link_id); 4994 ieee80211_sta_remove_link(sta, link_id); 4995 continue; 4996 } 4997 4998 if (link_id != assoc_data->assoc_link_id) { 4999 err = ieee80211_sta_activate_link(sta, link_id); 5000 if (err) 5001 goto out_err; 5002 } 5003 } 5004 5005 /* links might have changed due to rejected ones, set them again */ 5006 ieee80211_vif_set_links(sdata, valid_links); 5007 5008 rate_control_rate_init(sta); 5009 5010 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5011 set_sta_flag(sta, WLAN_STA_MFP); 5012 sta->sta.mfp = true; 5013 } else { 5014 sta->sta.mfp = false; 5015 } 5016 5017 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5018 elems->ext_capab_len); 5019 5020 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5021 local->hw.queues >= IEEE80211_NUM_ACS; 5022 5023 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5024 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5025 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5026 if (err) { 5027 sdata_info(sdata, 5028 "failed to move station %pM to desired state\n", 5029 sta->sta.addr); 5030 WARN_ON(__sta_info_destroy(sta)); 5031 goto out_err; 5032 } 5033 5034 if (sdata->wdev.use_4addr) 5035 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5036 5037 mutex_unlock(&sdata->local->sta_mtx); 5038 5039 ieee80211_set_associated(sdata, assoc_data, changed); 5040 5041 /* 5042 * If we're using 4-addr mode, let the AP know that we're 5043 * doing so, so that it can create the STA VLAN on its side 5044 */ 5045 if (ifmgd->use_4addr) 5046 ieee80211_send_4addr_nullfunc(local, sdata); 5047 5048 /* 5049 * Start timer to probe the connection to the AP now. 5050 * Also start the timer that will detect beacon loss. 5051 */ 5052 ieee80211_sta_reset_beacon_monitor(sdata); 5053 ieee80211_sta_reset_conn_monitor(sdata); 5054 5055 return true; 5056 out_err: 5057 eth_zero_addr(sdata->vif.cfg.ap_addr); 5058 mutex_unlock(&sdata->local->sta_mtx); 5059 return false; 5060 } 5061 5062 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5063 struct ieee80211_mgmt *mgmt, 5064 size_t len) 5065 { 5066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5067 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5068 u16 capab_info, status_code, aid; 5069 struct ieee80211_elems_parse_params parse_params = { 5070 .bss = NULL, 5071 .link_id = -1, 5072 .from_ap = true, 5073 }; 5074 struct ieee802_11_elems *elems; 5075 int ac; 5076 const u8 *elem_start; 5077 unsigned int elem_len; 5078 bool reassoc; 5079 struct ieee80211_event event = { 5080 .type = MLME_EVENT, 5081 .u.mlme.data = ASSOC_EVENT, 5082 }; 5083 struct ieee80211_prep_tx_info info = {}; 5084 struct cfg80211_rx_assoc_resp resp = { 5085 .uapsd_queues = -1, 5086 }; 5087 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5088 unsigned int link_id; 5089 5090 sdata_assert_lock(sdata); 5091 5092 if (!assoc_data) 5093 return; 5094 5095 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5096 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5097 return; 5098 5099 /* 5100 * AssocResp and ReassocResp have identical structure, so process both 5101 * of them in this function. 5102 */ 5103 5104 if (len < 24 + 6) 5105 return; 5106 5107 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5108 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5109 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5110 if (assoc_data->s1g) 5111 elem_start = mgmt->u.s1g_assoc_resp.variable; 5112 else 5113 elem_start = mgmt->u.assoc_resp.variable; 5114 5115 /* 5116 * Note: this may not be perfect, AP might misbehave - if 5117 * anyone needs to rely on perfect complete notification 5118 * with the exact right subtype, then we need to track what 5119 * we actually transmitted. 5120 */ 5121 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5122 IEEE80211_STYPE_ASSOC_REQ; 5123 5124 if (assoc_data->fils_kek_len && 5125 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5126 return; 5127 5128 elem_len = len - (elem_start - (u8 *)mgmt); 5129 parse_params.start = elem_start; 5130 parse_params.len = elem_len; 5131 elems = ieee802_11_parse_elems_full(&parse_params); 5132 if (!elems) 5133 goto notify_driver; 5134 5135 if (elems->aid_resp) 5136 aid = le16_to_cpu(elems->aid_resp->aid); 5137 else if (assoc_data->s1g) 5138 aid = 0; /* TODO */ 5139 else 5140 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5141 5142 /* 5143 * The 5 MSB of the AID field are reserved 5144 * (802.11-2016 9.4.1.8 AID field) 5145 */ 5146 aid &= 0x7ff; 5147 5148 sdata_info(sdata, 5149 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5150 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5151 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5152 5153 ifmgd->broken_ap = false; 5154 5155 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5156 elems->timeout_int && 5157 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5158 u32 tu, ms; 5159 5160 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5161 le32_to_cpu(elems->timeout_int->value)); 5162 5163 tu = le32_to_cpu(elems->timeout_int->value); 5164 ms = tu * 1024 / 1000; 5165 sdata_info(sdata, 5166 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5167 assoc_data->ap_addr, tu, ms); 5168 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5169 assoc_data->timeout_started = true; 5170 if (ms > IEEE80211_ASSOC_TIMEOUT) 5171 run_again(sdata, assoc_data->timeout); 5172 goto notify_driver; 5173 } 5174 5175 if (status_code != WLAN_STATUS_SUCCESS) { 5176 sdata_info(sdata, "%pM denied association (code=%d)\n", 5177 assoc_data->ap_addr, status_code); 5178 event.u.mlme.status = MLME_DENIED; 5179 event.u.mlme.reason = status_code; 5180 drv_event_callback(sdata->local, sdata, &event); 5181 } else { 5182 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5183 sdata_info(sdata, 5184 "invalid AID value %d (out of range), turn off PS\n", 5185 aid); 5186 aid = 0; 5187 ifmgd->broken_ap = true; 5188 } 5189 5190 if (sdata->vif.valid_links) { 5191 if (!elems->multi_link) { 5192 sdata_info(sdata, 5193 "MLO association with %pM but no multi-link element in response!\n", 5194 assoc_data->ap_addr); 5195 goto abandon_assoc; 5196 } 5197 5198 if (le16_get_bits(elems->multi_link->control, 5199 IEEE80211_ML_CONTROL_TYPE) != 5200 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5201 sdata_info(sdata, 5202 "bad multi-link element (control=0x%x)\n", 5203 le16_to_cpu(elems->multi_link->control)); 5204 goto abandon_assoc; 5205 } else { 5206 struct ieee80211_mle_basic_common_info *common; 5207 5208 common = (void *)elems->multi_link->variable; 5209 5210 if (memcmp(assoc_data->ap_addr, 5211 common->mld_mac_addr, ETH_ALEN)) { 5212 sdata_info(sdata, 5213 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5214 common->mld_mac_addr, 5215 assoc_data->ap_addr); 5216 goto abandon_assoc; 5217 } 5218 } 5219 } 5220 5221 sdata->vif.cfg.aid = aid; 5222 5223 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5224 elem_start, elem_len)) { 5225 /* oops -- internal error -- send timeout for now */ 5226 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5227 goto notify_driver; 5228 } 5229 event.u.mlme.status = MLME_SUCCESS; 5230 drv_event_callback(sdata->local, sdata, &event); 5231 sdata_info(sdata, "associated\n"); 5232 5233 info.success = 1; 5234 } 5235 5236 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5237 struct ieee80211_link_data *link; 5238 5239 link = sdata_dereference(sdata->link[link_id], sdata); 5240 if (!link) 5241 continue; 5242 5243 if (!assoc_data->link[link_id].bss) 5244 continue; 5245 5246 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5247 resp.links[link_id].addr = link->conf->addr; 5248 resp.links[link_id].status = assoc_data->link[link_id].status; 5249 5250 /* get uapsd queues configuration - same for all links */ 5251 resp.uapsd_queues = 0; 5252 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5253 if (link->tx_conf[ac].uapsd) 5254 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5255 } 5256 5257 if (sdata->vif.valid_links) { 5258 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5259 resp.ap_mld_addr = ap_mld_addr; 5260 } 5261 5262 ieee80211_destroy_assoc_data(sdata, 5263 status_code == WLAN_STATUS_SUCCESS ? 5264 ASSOC_SUCCESS : 5265 ASSOC_REJECTED); 5266 5267 resp.buf = (u8 *)mgmt; 5268 resp.len = len; 5269 resp.req_ies = ifmgd->assoc_req_ies; 5270 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5271 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5272 notify_driver: 5273 drv_mgd_complete_tx(sdata->local, sdata, &info); 5274 kfree(elems); 5275 return; 5276 abandon_assoc: 5277 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5278 goto notify_driver; 5279 } 5280 5281 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5282 struct ieee80211_mgmt *mgmt, size_t len, 5283 struct ieee80211_rx_status *rx_status) 5284 { 5285 struct ieee80211_sub_if_data *sdata = link->sdata; 5286 struct ieee80211_local *local = sdata->local; 5287 struct ieee80211_bss *bss; 5288 struct ieee80211_channel *channel; 5289 5290 sdata_assert_lock(sdata); 5291 5292 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5293 ieee80211_rx_status_to_khz(rx_status)); 5294 if (!channel) 5295 return; 5296 5297 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5298 if (bss) { 5299 link->conf->beacon_rate = bss->beacon_rate; 5300 ieee80211_rx_bss_put(local, bss); 5301 } 5302 } 5303 5304 5305 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5306 struct sk_buff *skb) 5307 { 5308 struct ieee80211_sub_if_data *sdata = link->sdata; 5309 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5310 struct ieee80211_if_managed *ifmgd; 5311 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5312 struct ieee80211_channel *channel; 5313 size_t baselen, len = skb->len; 5314 5315 ifmgd = &sdata->u.mgd; 5316 5317 sdata_assert_lock(sdata); 5318 5319 /* 5320 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5321 * "If a 6 GHz AP receives a Probe Request frame and responds with 5322 * a Probe Response frame [..], the Address 1 field of the Probe 5323 * Response frame shall be set to the broadcast address [..]" 5324 * So, on 6GHz band we should also accept broadcast responses. 5325 */ 5326 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5327 rx_status->freq); 5328 if (!channel) 5329 return; 5330 5331 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5332 (channel->band != NL80211_BAND_6GHZ || 5333 !is_broadcast_ether_addr(mgmt->da))) 5334 return; /* ignore ProbeResp to foreign address */ 5335 5336 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5337 if (baselen > len) 5338 return; 5339 5340 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5341 5342 if (ifmgd->associated && 5343 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5344 ieee80211_reset_ap_probe(sdata); 5345 } 5346 5347 /* 5348 * This is the canonical list of information elements we care about, 5349 * the filter code also gives us all changes to the Microsoft OUI 5350 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5351 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5352 * changes to requested client power. 5353 * 5354 * We implement beacon filtering in software since that means we can 5355 * avoid processing the frame here and in cfg80211, and userspace 5356 * will not be able to tell whether the hardware supports it or not. 5357 * 5358 * XXX: This list needs to be dynamic -- userspace needs to be able to 5359 * add items it requires. It also needs to be able to tell us to 5360 * look out for other vendor IEs. 5361 */ 5362 static const u64 care_about_ies = 5363 (1ULL << WLAN_EID_COUNTRY) | 5364 (1ULL << WLAN_EID_ERP_INFO) | 5365 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5366 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5367 (1ULL << WLAN_EID_HT_CAPABILITY) | 5368 (1ULL << WLAN_EID_HT_OPERATION) | 5369 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5370 5371 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5372 struct ieee80211_if_managed *ifmgd, 5373 struct ieee80211_bss_conf *bss_conf, 5374 struct ieee80211_local *local, 5375 struct ieee80211_rx_status *rx_status) 5376 { 5377 struct ieee80211_sub_if_data *sdata = link->sdata; 5378 5379 /* Track average RSSI from the Beacon frames of the current AP */ 5380 5381 if (!link->u.mgd.tracking_signal_avg) { 5382 link->u.mgd.tracking_signal_avg = true; 5383 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5384 link->u.mgd.last_cqm_event_signal = 0; 5385 link->u.mgd.count_beacon_signal = 1; 5386 link->u.mgd.last_ave_beacon_signal = 0; 5387 } else { 5388 link->u.mgd.count_beacon_signal++; 5389 } 5390 5391 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5392 -rx_status->signal); 5393 5394 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5395 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5396 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5397 int last_sig = link->u.mgd.last_ave_beacon_signal; 5398 struct ieee80211_event event = { 5399 .type = RSSI_EVENT, 5400 }; 5401 5402 /* 5403 * if signal crosses either of the boundaries, invoke callback 5404 * with appropriate parameters 5405 */ 5406 if (sig > ifmgd->rssi_max_thold && 5407 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5408 link->u.mgd.last_ave_beacon_signal = sig; 5409 event.u.rssi.data = RSSI_EVENT_HIGH; 5410 drv_event_callback(local, sdata, &event); 5411 } else if (sig < ifmgd->rssi_min_thold && 5412 (last_sig >= ifmgd->rssi_max_thold || 5413 last_sig == 0)) { 5414 link->u.mgd.last_ave_beacon_signal = sig; 5415 event.u.rssi.data = RSSI_EVENT_LOW; 5416 drv_event_callback(local, sdata, &event); 5417 } 5418 } 5419 5420 if (bss_conf->cqm_rssi_thold && 5421 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5422 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5423 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5424 int last_event = link->u.mgd.last_cqm_event_signal; 5425 int thold = bss_conf->cqm_rssi_thold; 5426 int hyst = bss_conf->cqm_rssi_hyst; 5427 5428 if (sig < thold && 5429 (last_event == 0 || sig < last_event - hyst)) { 5430 link->u.mgd.last_cqm_event_signal = sig; 5431 ieee80211_cqm_rssi_notify( 5432 &sdata->vif, 5433 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5434 sig, GFP_KERNEL); 5435 } else if (sig > thold && 5436 (last_event == 0 || sig > last_event + hyst)) { 5437 link->u.mgd.last_cqm_event_signal = sig; 5438 ieee80211_cqm_rssi_notify( 5439 &sdata->vif, 5440 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5441 sig, GFP_KERNEL); 5442 } 5443 } 5444 5445 if (bss_conf->cqm_rssi_low && 5446 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5447 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5448 int last_event = link->u.mgd.last_cqm_event_signal; 5449 int low = bss_conf->cqm_rssi_low; 5450 int high = bss_conf->cqm_rssi_high; 5451 5452 if (sig < low && 5453 (last_event == 0 || last_event >= low)) { 5454 link->u.mgd.last_cqm_event_signal = sig; 5455 ieee80211_cqm_rssi_notify( 5456 &sdata->vif, 5457 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5458 sig, GFP_KERNEL); 5459 } else if (sig > high && 5460 (last_event == 0 || last_event <= high)) { 5461 link->u.mgd.last_cqm_event_signal = sig; 5462 ieee80211_cqm_rssi_notify( 5463 &sdata->vif, 5464 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5465 sig, GFP_KERNEL); 5466 } 5467 } 5468 } 5469 5470 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5471 struct cfg80211_bss *bss) 5472 { 5473 if (ether_addr_equal(tx_bssid, bss->bssid)) 5474 return true; 5475 if (!bss->transmitted_bss) 5476 return false; 5477 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5478 } 5479 5480 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5481 struct ieee80211_hdr *hdr, size_t len, 5482 struct ieee80211_rx_status *rx_status) 5483 { 5484 struct ieee80211_sub_if_data *sdata = link->sdata; 5485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5486 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5487 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5488 struct ieee80211_mgmt *mgmt = (void *) hdr; 5489 size_t baselen; 5490 struct ieee802_11_elems *elems; 5491 struct ieee80211_local *local = sdata->local; 5492 struct ieee80211_chanctx_conf *chanctx_conf; 5493 struct ieee80211_supported_band *sband; 5494 struct ieee80211_channel *chan; 5495 struct link_sta_info *link_sta; 5496 struct sta_info *sta; 5497 u32 changed = 0; 5498 bool erp_valid; 5499 u8 erp_value = 0; 5500 u32 ncrc = 0; 5501 u8 *bssid, *variable = mgmt->u.beacon.variable; 5502 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5503 struct ieee80211_elems_parse_params parse_params = { 5504 .link_id = -1, 5505 .from_ap = true, 5506 }; 5507 5508 sdata_assert_lock(sdata); 5509 5510 /* Process beacon from the current BSS */ 5511 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5512 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5513 struct ieee80211_ext *ext = (void *) mgmt; 5514 5515 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5516 variable = ext->u.s1g_short_beacon.variable; 5517 else 5518 variable = ext->u.s1g_beacon.variable; 5519 } 5520 5521 baselen = (u8 *) variable - (u8 *) mgmt; 5522 if (baselen > len) 5523 return; 5524 5525 parse_params.start = variable; 5526 parse_params.len = len - baselen; 5527 5528 rcu_read_lock(); 5529 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5530 if (!chanctx_conf) { 5531 rcu_read_unlock(); 5532 return; 5533 } 5534 5535 if (ieee80211_rx_status_to_khz(rx_status) != 5536 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5537 rcu_read_unlock(); 5538 return; 5539 } 5540 chan = chanctx_conf->def.chan; 5541 rcu_read_unlock(); 5542 5543 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5544 !WARN_ON(sdata->vif.valid_links) && 5545 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5546 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5547 elems = ieee802_11_parse_elems_full(&parse_params); 5548 if (!elems) 5549 return; 5550 5551 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5552 5553 if (elems->dtim_period) 5554 link->u.mgd.dtim_period = elems->dtim_period; 5555 link->u.mgd.have_beacon = true; 5556 ifmgd->assoc_data->need_beacon = false; 5557 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5558 link->conf->sync_tsf = 5559 le64_to_cpu(mgmt->u.beacon.timestamp); 5560 link->conf->sync_device_ts = 5561 rx_status->device_timestamp; 5562 link->conf->sync_dtim_count = elems->dtim_count; 5563 } 5564 5565 if (elems->mbssid_config_ie) 5566 bss_conf->profile_periodicity = 5567 elems->mbssid_config_ie->profile_periodicity; 5568 else 5569 bss_conf->profile_periodicity = 0; 5570 5571 if (elems->ext_capab_len >= 11 && 5572 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5573 bss_conf->ema_ap = true; 5574 else 5575 bss_conf->ema_ap = false; 5576 5577 /* continue assoc process */ 5578 ifmgd->assoc_data->timeout = jiffies; 5579 ifmgd->assoc_data->timeout_started = true; 5580 run_again(sdata, ifmgd->assoc_data->timeout); 5581 kfree(elems); 5582 return; 5583 } 5584 5585 if (!ifmgd->associated || 5586 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5587 return; 5588 bssid = link->u.mgd.bssid; 5589 5590 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5591 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5592 local, rx_status); 5593 5594 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5595 mlme_dbg_ratelimited(sdata, 5596 "cancelling AP probe due to a received beacon\n"); 5597 ieee80211_reset_ap_probe(sdata); 5598 } 5599 5600 /* 5601 * Push the beacon loss detection into the future since 5602 * we are processing a beacon from the AP just now. 5603 */ 5604 ieee80211_sta_reset_beacon_monitor(sdata); 5605 5606 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5607 * element (which carries the beacon interval). Don't forget to add a 5608 * bit to care_about_ies[] above if mac80211 is interested in a 5609 * changing S1G element. 5610 */ 5611 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5612 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5613 parse_params.bss = link->u.mgd.bss; 5614 parse_params.filter = care_about_ies; 5615 parse_params.crc = ncrc; 5616 elems = ieee802_11_parse_elems_full(&parse_params); 5617 if (!elems) 5618 return; 5619 ncrc = elems->crc; 5620 5621 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5622 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5623 if (local->hw.conf.dynamic_ps_timeout > 0) { 5624 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5625 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5626 ieee80211_hw_config(local, 5627 IEEE80211_CONF_CHANGE_PS); 5628 } 5629 ieee80211_send_nullfunc(local, sdata, false); 5630 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5631 local->pspolling = true; 5632 5633 /* 5634 * Here is assumed that the driver will be 5635 * able to send ps-poll frame and receive a 5636 * response even though power save mode is 5637 * enabled, but some drivers might require 5638 * to disable power save here. This needs 5639 * to be investigated. 5640 */ 5641 ieee80211_send_pspoll(local, sdata); 5642 } 5643 } 5644 5645 if (sdata->vif.p2p || 5646 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5647 struct ieee80211_p2p_noa_attr noa = {}; 5648 int ret; 5649 5650 ret = cfg80211_get_p2p_attr(variable, 5651 len - baselen, 5652 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5653 (u8 *) &noa, sizeof(noa)); 5654 if (ret >= 2) { 5655 if (link->u.mgd.p2p_noa_index != noa.index) { 5656 /* valid noa_attr and index changed */ 5657 link->u.mgd.p2p_noa_index = noa.index; 5658 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5659 changed |= BSS_CHANGED_P2P_PS; 5660 /* 5661 * make sure we update all information, the CRC 5662 * mechanism doesn't look at P2P attributes. 5663 */ 5664 link->u.mgd.beacon_crc_valid = false; 5665 } 5666 } else if (link->u.mgd.p2p_noa_index != -1) { 5667 /* noa_attr not found and we had valid noa_attr before */ 5668 link->u.mgd.p2p_noa_index = -1; 5669 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5670 changed |= BSS_CHANGED_P2P_PS; 5671 link->u.mgd.beacon_crc_valid = false; 5672 } 5673 } 5674 5675 if (link->u.mgd.csa_waiting_bcn) 5676 ieee80211_chswitch_post_beacon(link); 5677 5678 /* 5679 * Update beacon timing and dtim count on every beacon appearance. This 5680 * will allow the driver to use the most updated values. Do it before 5681 * comparing this one with last received beacon. 5682 * IMPORTANT: These parameters would possibly be out of sync by the time 5683 * the driver will use them. The synchronized view is currently 5684 * guaranteed only in certain callbacks. 5685 */ 5686 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5687 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5688 link->conf->sync_tsf = 5689 le64_to_cpu(mgmt->u.beacon.timestamp); 5690 link->conf->sync_device_ts = 5691 rx_status->device_timestamp; 5692 link->conf->sync_dtim_count = elems->dtim_count; 5693 } 5694 5695 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5696 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5697 goto free; 5698 link->u.mgd.beacon_crc = ncrc; 5699 link->u.mgd.beacon_crc_valid = true; 5700 5701 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5702 5703 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5704 rx_status->device_timestamp, 5705 elems, true); 5706 5707 if (!link->u.mgd.disable_wmm_tracking && 5708 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5709 elems->wmm_param_len, 5710 elems->mu_edca_param_set)) 5711 changed |= BSS_CHANGED_QOS; 5712 5713 /* 5714 * If we haven't had a beacon before, tell the driver about the 5715 * DTIM period (and beacon timing if desired) now. 5716 */ 5717 if (!link->u.mgd.have_beacon) { 5718 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5719 bss_conf->dtim_period = elems->dtim_period ?: 1; 5720 5721 changed |= BSS_CHANGED_BEACON_INFO; 5722 link->u.mgd.have_beacon = true; 5723 5724 mutex_lock(&local->iflist_mtx); 5725 ieee80211_recalc_ps(local); 5726 mutex_unlock(&local->iflist_mtx); 5727 5728 ieee80211_recalc_ps_vif(sdata); 5729 } 5730 5731 if (elems->erp_info) { 5732 erp_valid = true; 5733 erp_value = elems->erp_info[0]; 5734 } else { 5735 erp_valid = false; 5736 } 5737 5738 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5739 changed |= ieee80211_handle_bss_capability(link, 5740 le16_to_cpu(mgmt->u.beacon.capab_info), 5741 erp_valid, erp_value); 5742 5743 mutex_lock(&local->sta_mtx); 5744 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5745 if (WARN_ON(!sta)) { 5746 mutex_unlock(&local->sta_mtx); 5747 goto free; 5748 } 5749 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5750 lockdep_is_held(&local->sta_mtx)); 5751 if (WARN_ON(!link_sta)) { 5752 mutex_unlock(&local->sta_mtx); 5753 goto free; 5754 } 5755 5756 if (WARN_ON(!link->conf->chandef.chan)) 5757 goto free; 5758 5759 sband = local->hw.wiphy->bands[link->conf->chandef.chan->band]; 5760 5761 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 5762 5763 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5764 elems->vht_cap_elem, elems->ht_operation, 5765 elems->vht_operation, elems->he_operation, 5766 elems->eht_operation, 5767 elems->s1g_oper, bssid, &changed)) { 5768 mutex_unlock(&local->sta_mtx); 5769 sdata_info(sdata, 5770 "failed to follow AP %pM bandwidth change, disconnect\n", 5771 bssid); 5772 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5773 WLAN_REASON_DEAUTH_LEAVING, 5774 true, deauth_buf); 5775 ieee80211_report_disconnect(sdata, deauth_buf, 5776 sizeof(deauth_buf), true, 5777 WLAN_REASON_DEAUTH_LEAVING, 5778 false); 5779 goto free; 5780 } 5781 5782 if (sta && elems->opmode_notif) 5783 ieee80211_vht_handle_opmode(sdata, link_sta, 5784 *elems->opmode_notif, 5785 rx_status->band); 5786 mutex_unlock(&local->sta_mtx); 5787 5788 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5789 elems->country_elem, 5790 elems->country_elem_len, 5791 elems->pwr_constr_elem, 5792 elems->cisco_dtpc_elem); 5793 5794 ieee80211_link_info_change_notify(sdata, link, changed); 5795 free: 5796 kfree(elems); 5797 } 5798 5799 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5800 struct sk_buff *skb) 5801 { 5802 struct ieee80211_link_data *link = &sdata->deflink; 5803 struct ieee80211_rx_status *rx_status; 5804 struct ieee80211_hdr *hdr; 5805 u16 fc; 5806 5807 rx_status = (struct ieee80211_rx_status *) skb->cb; 5808 hdr = (struct ieee80211_hdr *) skb->data; 5809 fc = le16_to_cpu(hdr->frame_control); 5810 5811 sdata_lock(sdata); 5812 switch (fc & IEEE80211_FCTL_STYPE) { 5813 case IEEE80211_STYPE_S1G_BEACON: 5814 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5815 break; 5816 } 5817 sdata_unlock(sdata); 5818 } 5819 5820 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5821 struct sk_buff *skb) 5822 { 5823 struct ieee80211_link_data *link = &sdata->deflink; 5824 struct ieee80211_rx_status *rx_status; 5825 struct ieee80211_mgmt *mgmt; 5826 u16 fc; 5827 int ies_len; 5828 5829 rx_status = (struct ieee80211_rx_status *) skb->cb; 5830 mgmt = (struct ieee80211_mgmt *) skb->data; 5831 fc = le16_to_cpu(mgmt->frame_control); 5832 5833 sdata_lock(sdata); 5834 5835 if (rx_status->link_valid) { 5836 link = sdata_dereference(sdata->link[rx_status->link_id], 5837 sdata); 5838 if (!link) 5839 goto out; 5840 } 5841 5842 switch (fc & IEEE80211_FCTL_STYPE) { 5843 case IEEE80211_STYPE_BEACON: 5844 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5845 skb->len, rx_status); 5846 break; 5847 case IEEE80211_STYPE_PROBE_RESP: 5848 ieee80211_rx_mgmt_probe_resp(link, skb); 5849 break; 5850 case IEEE80211_STYPE_AUTH: 5851 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5852 break; 5853 case IEEE80211_STYPE_DEAUTH: 5854 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5855 break; 5856 case IEEE80211_STYPE_DISASSOC: 5857 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5858 break; 5859 case IEEE80211_STYPE_ASSOC_RESP: 5860 case IEEE80211_STYPE_REASSOC_RESP: 5861 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5862 break; 5863 case IEEE80211_STYPE_ACTION: 5864 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 5865 struct ieee802_11_elems *elems; 5866 5867 ies_len = skb->len - 5868 offsetof(struct ieee80211_mgmt, 5869 u.action.u.chan_switch.variable); 5870 5871 if (ies_len < 0) 5872 break; 5873 5874 /* CSA IE cannot be overridden, no need for BSSID */ 5875 elems = ieee802_11_parse_elems( 5876 mgmt->u.action.u.chan_switch.variable, 5877 ies_len, true, NULL); 5878 5879 if (elems && !elems->parse_error) 5880 ieee80211_sta_process_chanswitch(link, 5881 rx_status->mactime, 5882 rx_status->device_timestamp, 5883 elems, false); 5884 kfree(elems); 5885 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 5886 struct ieee802_11_elems *elems; 5887 5888 ies_len = skb->len - 5889 offsetof(struct ieee80211_mgmt, 5890 u.action.u.ext_chan_switch.variable); 5891 5892 if (ies_len < 0) 5893 break; 5894 5895 /* 5896 * extended CSA IE can't be overridden, no need for 5897 * BSSID 5898 */ 5899 elems = ieee802_11_parse_elems( 5900 mgmt->u.action.u.ext_chan_switch.variable, 5901 ies_len, true, NULL); 5902 5903 if (elems && !elems->parse_error) { 5904 /* for the handling code pretend it was an IE */ 5905 elems->ext_chansw_ie = 5906 &mgmt->u.action.u.ext_chan_switch.data; 5907 5908 ieee80211_sta_process_chanswitch(link, 5909 rx_status->mactime, 5910 rx_status->device_timestamp, 5911 elems, false); 5912 } 5913 5914 kfree(elems); 5915 } 5916 break; 5917 } 5918 out: 5919 sdata_unlock(sdata); 5920 } 5921 5922 static void ieee80211_sta_timer(struct timer_list *t) 5923 { 5924 struct ieee80211_sub_if_data *sdata = 5925 from_timer(sdata, t, u.mgd.timer); 5926 5927 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 5928 } 5929 5930 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 5931 u8 reason, bool tx) 5932 { 5933 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5934 5935 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 5936 tx, frame_buf); 5937 5938 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5939 reason, false); 5940 } 5941 5942 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 5943 { 5944 struct ieee80211_local *local = sdata->local; 5945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5946 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 5947 u32 tx_flags = 0; 5948 u16 trans = 1; 5949 u16 status = 0; 5950 struct ieee80211_prep_tx_info info = { 5951 .subtype = IEEE80211_STYPE_AUTH, 5952 }; 5953 5954 sdata_assert_lock(sdata); 5955 5956 if (WARN_ON_ONCE(!auth_data)) 5957 return -EINVAL; 5958 5959 auth_data->tries++; 5960 5961 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 5962 sdata_info(sdata, "authentication with %pM timed out\n", 5963 auth_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, auth_data->bss); 5970 5971 return -ETIMEDOUT; 5972 } 5973 5974 if (auth_data->algorithm == WLAN_AUTH_SAE) 5975 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 5976 5977 drv_mgd_prepare_tx(local, sdata, &info); 5978 5979 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 5980 auth_data->ap_addr, auth_data->tries, 5981 IEEE80211_AUTH_MAX_TRIES); 5982 5983 auth_data->expected_transaction = 2; 5984 5985 if (auth_data->algorithm == WLAN_AUTH_SAE) { 5986 trans = auth_data->sae_trans; 5987 status = auth_data->sae_status; 5988 auth_data->expected_transaction = trans; 5989 } 5990 5991 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5992 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 5993 IEEE80211_TX_INTFL_MLME_CONN_TX; 5994 5995 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 5996 auth_data->data, auth_data->data_len, 5997 auth_data->ap_addr, auth_data->ap_addr, 5998 NULL, 0, 0, tx_flags); 5999 6000 if (tx_flags == 0) { 6001 if (auth_data->algorithm == WLAN_AUTH_SAE) 6002 auth_data->timeout = jiffies + 6003 IEEE80211_AUTH_TIMEOUT_SAE; 6004 else 6005 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6006 } else { 6007 auth_data->timeout = 6008 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6009 } 6010 6011 auth_data->timeout_started = true; 6012 run_again(sdata, auth_data->timeout); 6013 6014 return 0; 6015 } 6016 6017 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 6018 { 6019 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 6020 struct ieee80211_local *local = sdata->local; 6021 int ret; 6022 6023 sdata_assert_lock(sdata); 6024 6025 assoc_data->tries++; 6026 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 6027 sdata_info(sdata, "association with %pM timed out\n", 6028 assoc_data->ap_addr); 6029 6030 /* 6031 * Most likely AP is not in the range so remove the 6032 * bss struct for that AP. 6033 */ 6034 cfg80211_unlink_bss(local->hw.wiphy, 6035 assoc_data->link[assoc_data->assoc_link_id].bss); 6036 6037 return -ETIMEDOUT; 6038 } 6039 6040 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 6041 assoc_data->ap_addr, assoc_data->tries, 6042 IEEE80211_ASSOC_MAX_TRIES); 6043 ret = ieee80211_send_assoc(sdata); 6044 if (ret) 6045 return ret; 6046 6047 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6048 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 6049 assoc_data->timeout_started = true; 6050 run_again(sdata, assoc_data->timeout); 6051 } else { 6052 assoc_data->timeout = 6053 round_jiffies_up(jiffies + 6054 IEEE80211_ASSOC_TIMEOUT_LONG); 6055 assoc_data->timeout_started = true; 6056 run_again(sdata, assoc_data->timeout); 6057 } 6058 6059 return 0; 6060 } 6061 6062 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 6063 __le16 fc, bool acked) 6064 { 6065 struct ieee80211_local *local = sdata->local; 6066 6067 sdata->u.mgd.status_fc = fc; 6068 sdata->u.mgd.status_acked = acked; 6069 sdata->u.mgd.status_received = true; 6070 6071 ieee80211_queue_work(&local->hw, &sdata->work); 6072 } 6073 6074 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 6075 { 6076 struct ieee80211_local *local = sdata->local; 6077 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6078 6079 sdata_lock(sdata); 6080 6081 if (ifmgd->status_received) { 6082 __le16 fc = ifmgd->status_fc; 6083 bool status_acked = ifmgd->status_acked; 6084 6085 ifmgd->status_received = false; 6086 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 6087 if (status_acked) { 6088 if (ifmgd->auth_data->algorithm == 6089 WLAN_AUTH_SAE) 6090 ifmgd->auth_data->timeout = 6091 jiffies + 6092 IEEE80211_AUTH_TIMEOUT_SAE; 6093 else 6094 ifmgd->auth_data->timeout = 6095 jiffies + 6096 IEEE80211_AUTH_TIMEOUT_SHORT; 6097 run_again(sdata, ifmgd->auth_data->timeout); 6098 } else { 6099 ifmgd->auth_data->timeout = jiffies - 1; 6100 } 6101 ifmgd->auth_data->timeout_started = true; 6102 } else if (ifmgd->assoc_data && 6103 (ieee80211_is_assoc_req(fc) || 6104 ieee80211_is_reassoc_req(fc))) { 6105 if (status_acked) { 6106 ifmgd->assoc_data->timeout = 6107 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 6108 run_again(sdata, ifmgd->assoc_data->timeout); 6109 } else { 6110 ifmgd->assoc_data->timeout = jiffies - 1; 6111 } 6112 ifmgd->assoc_data->timeout_started = true; 6113 } 6114 } 6115 6116 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6117 time_after(jiffies, ifmgd->auth_data->timeout)) { 6118 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6119 /* 6120 * ok ... we waited for assoc or continuation but 6121 * userspace didn't do it, so kill the auth data 6122 */ 6123 ieee80211_destroy_auth_data(sdata, false); 6124 } else if (ieee80211_auth(sdata)) { 6125 u8 ap_addr[ETH_ALEN]; 6126 struct ieee80211_event event = { 6127 .type = MLME_EVENT, 6128 .u.mlme.data = AUTH_EVENT, 6129 .u.mlme.status = MLME_TIMEOUT, 6130 }; 6131 6132 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6133 6134 ieee80211_destroy_auth_data(sdata, false); 6135 6136 cfg80211_auth_timeout(sdata->dev, ap_addr); 6137 drv_event_callback(sdata->local, sdata, &event); 6138 } 6139 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6140 run_again(sdata, ifmgd->auth_data->timeout); 6141 6142 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6143 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6144 if ((ifmgd->assoc_data->need_beacon && 6145 !sdata->deflink.u.mgd.have_beacon) || 6146 ieee80211_do_assoc(sdata)) { 6147 struct ieee80211_event event = { 6148 .type = MLME_EVENT, 6149 .u.mlme.data = ASSOC_EVENT, 6150 .u.mlme.status = MLME_TIMEOUT, 6151 }; 6152 6153 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6154 drv_event_callback(sdata->local, sdata, &event); 6155 } 6156 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6157 run_again(sdata, ifmgd->assoc_data->timeout); 6158 6159 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6160 ifmgd->associated) { 6161 u8 *bssid = sdata->deflink.u.mgd.bssid; 6162 int max_tries; 6163 6164 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6165 max_tries = max_nullfunc_tries; 6166 else 6167 max_tries = max_probe_tries; 6168 6169 /* ACK received for nullfunc probing frame */ 6170 if (!ifmgd->probe_send_count) 6171 ieee80211_reset_ap_probe(sdata); 6172 else if (ifmgd->nullfunc_failed) { 6173 if (ifmgd->probe_send_count < max_tries) { 6174 mlme_dbg(sdata, 6175 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6176 bssid, ifmgd->probe_send_count, 6177 max_tries); 6178 ieee80211_mgd_probe_ap_send(sdata); 6179 } else { 6180 mlme_dbg(sdata, 6181 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6182 bssid); 6183 ieee80211_sta_connection_lost(sdata, 6184 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6185 false); 6186 } 6187 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6188 run_again(sdata, ifmgd->probe_timeout); 6189 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6190 mlme_dbg(sdata, 6191 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6192 bssid, probe_wait_ms); 6193 ieee80211_sta_connection_lost(sdata, 6194 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6195 } else if (ifmgd->probe_send_count < max_tries) { 6196 mlme_dbg(sdata, 6197 "No probe response from AP %pM after %dms, try %d/%i\n", 6198 bssid, probe_wait_ms, 6199 ifmgd->probe_send_count, max_tries); 6200 ieee80211_mgd_probe_ap_send(sdata); 6201 } else { 6202 /* 6203 * We actually lost the connection ... or did we? 6204 * Let's make sure! 6205 */ 6206 mlme_dbg(sdata, 6207 "No probe response from AP %pM after %dms, disconnecting.\n", 6208 bssid, probe_wait_ms); 6209 6210 ieee80211_sta_connection_lost(sdata, 6211 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6212 } 6213 } 6214 6215 sdata_unlock(sdata); 6216 } 6217 6218 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6219 { 6220 struct ieee80211_sub_if_data *sdata = 6221 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6222 6223 if (WARN_ON(sdata->vif.valid_links)) 6224 return; 6225 6226 if (sdata->vif.bss_conf.csa_active && 6227 !sdata->deflink.u.mgd.csa_waiting_bcn) 6228 return; 6229 6230 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6231 return; 6232 6233 sdata->u.mgd.connection_loss = false; 6234 ieee80211_queue_work(&sdata->local->hw, 6235 &sdata->u.mgd.beacon_connection_loss_work); 6236 } 6237 6238 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6239 { 6240 struct ieee80211_sub_if_data *sdata = 6241 from_timer(sdata, t, u.mgd.conn_mon_timer); 6242 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6243 struct ieee80211_local *local = sdata->local; 6244 struct sta_info *sta; 6245 unsigned long timeout; 6246 6247 if (WARN_ON(sdata->vif.valid_links)) 6248 return; 6249 6250 if (sdata->vif.bss_conf.csa_active && 6251 !sdata->deflink.u.mgd.csa_waiting_bcn) 6252 return; 6253 6254 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6255 if (!sta) 6256 return; 6257 6258 timeout = sta->deflink.status_stats.last_ack; 6259 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6260 timeout = sta->deflink.rx_stats.last_rx; 6261 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6262 6263 /* If timeout is after now, then update timer to fire at 6264 * the later date, but do not actually probe at this time. 6265 */ 6266 if (time_is_after_jiffies(timeout)) { 6267 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6268 return; 6269 } 6270 6271 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6272 } 6273 6274 static void ieee80211_sta_monitor_work(struct work_struct *work) 6275 { 6276 struct ieee80211_sub_if_data *sdata = 6277 container_of(work, struct ieee80211_sub_if_data, 6278 u.mgd.monitor_work); 6279 6280 ieee80211_mgd_probe_ap(sdata, false); 6281 } 6282 6283 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6284 { 6285 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6286 __ieee80211_stop_poll(sdata); 6287 6288 /* let's probe the connection once */ 6289 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6290 ieee80211_queue_work(&sdata->local->hw, 6291 &sdata->u.mgd.monitor_work); 6292 } 6293 } 6294 6295 #ifdef CONFIG_PM 6296 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6297 { 6298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6299 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6300 6301 sdata_lock(sdata); 6302 6303 if (ifmgd->auth_data || ifmgd->assoc_data) { 6304 const u8 *ap_addr = ifmgd->auth_data ? 6305 ifmgd->auth_data->ap_addr : 6306 ifmgd->assoc_data->ap_addr; 6307 6308 /* 6309 * If we are trying to authenticate / associate while suspending, 6310 * cfg80211 won't know and won't actually abort those attempts, 6311 * thus we need to do that ourselves. 6312 */ 6313 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6314 IEEE80211_STYPE_DEAUTH, 6315 WLAN_REASON_DEAUTH_LEAVING, 6316 false, frame_buf); 6317 if (ifmgd->assoc_data) 6318 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6319 if (ifmgd->auth_data) 6320 ieee80211_destroy_auth_data(sdata, false); 6321 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6322 IEEE80211_DEAUTH_FRAME_LEN, 6323 false); 6324 } 6325 6326 /* This is a bit of a hack - we should find a better and more generic 6327 * solution to this. Normally when suspending, cfg80211 will in fact 6328 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6329 * auth (not so important) or assoc (this is the problem) process. 6330 * 6331 * As a consequence, it can happen that we are in the process of both 6332 * associating and suspending, and receive an association response 6333 * after cfg80211 has checked if it needs to disconnect, but before 6334 * we actually set the flag to drop incoming frames. This will then 6335 * cause the workqueue flush to process the association response in 6336 * the suspend, resulting in a successful association just before it 6337 * tries to remove the interface from the driver, which now though 6338 * has a channel context assigned ... this results in issues. 6339 * 6340 * To work around this (for now) simply deauth here again if we're 6341 * now connected. 6342 */ 6343 if (ifmgd->associated && !sdata->local->wowlan) { 6344 u8 bssid[ETH_ALEN]; 6345 struct cfg80211_deauth_request req = { 6346 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6347 .bssid = bssid, 6348 }; 6349 6350 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6351 ieee80211_mgd_deauth(sdata, &req); 6352 } 6353 6354 sdata_unlock(sdata); 6355 } 6356 #endif 6357 6358 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6359 { 6360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6361 6362 sdata_lock(sdata); 6363 if (!ifmgd->associated) { 6364 sdata_unlock(sdata); 6365 return; 6366 } 6367 6368 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6369 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6370 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6371 ieee80211_sta_connection_lost(sdata, 6372 WLAN_REASON_UNSPECIFIED, 6373 true); 6374 sdata_unlock(sdata); 6375 return; 6376 } 6377 6378 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6379 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6380 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6381 ieee80211_sta_connection_lost(sdata, 6382 WLAN_REASON_UNSPECIFIED, 6383 true); 6384 sdata_unlock(sdata); 6385 return; 6386 } 6387 6388 sdata_unlock(sdata); 6389 } 6390 6391 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6392 { 6393 struct ieee80211_link_data *link = 6394 container_of(work, struct ieee80211_link_data, 6395 u.mgd.request_smps_work); 6396 6397 sdata_lock(link->sdata); 6398 __ieee80211_request_smps_mgd(link->sdata, link, 6399 link->u.mgd.driver_smps_mode); 6400 sdata_unlock(link->sdata); 6401 } 6402 6403 /* interface setup */ 6404 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6405 { 6406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6407 6408 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6409 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6410 ieee80211_beacon_connection_loss_work); 6411 INIT_WORK(&ifmgd->csa_connection_drop_work, 6412 ieee80211_csa_connection_drop_work); 6413 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6414 ieee80211_tdls_peer_del_work); 6415 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6416 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6417 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6418 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6419 ieee80211_sta_handle_tspec_ac_params_wk); 6420 6421 ifmgd->flags = 0; 6422 ifmgd->powersave = sdata->wdev.ps; 6423 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6424 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6425 /* Setup TDLS data */ 6426 spin_lock_init(&ifmgd->teardown_lock); 6427 ifmgd->teardown_skb = NULL; 6428 ifmgd->orig_teardown_skb = NULL; 6429 } 6430 6431 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6432 { 6433 struct ieee80211_sub_if_data *sdata = link->sdata; 6434 struct ieee80211_local *local = sdata->local; 6435 unsigned int link_id = link->link_id; 6436 6437 link->u.mgd.p2p_noa_index = -1; 6438 link->u.mgd.conn_flags = 0; 6439 link->conf->bssid = link->u.mgd.bssid; 6440 6441 INIT_WORK(&link->u.mgd.request_smps_work, 6442 ieee80211_request_smps_mgd_work); 6443 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6444 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6445 else 6446 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6447 6448 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6449 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6450 6451 if (sdata->u.mgd.assoc_data) 6452 ether_addr_copy(link->conf->addr, 6453 sdata->u.mgd.assoc_data->link[link_id].addr); 6454 else if (!is_valid_ether_addr(link->conf->addr)) 6455 eth_random_addr(link->conf->addr); 6456 } 6457 6458 /* scan finished notification */ 6459 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6460 { 6461 struct ieee80211_sub_if_data *sdata; 6462 6463 /* Restart STA timers */ 6464 rcu_read_lock(); 6465 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6466 if (ieee80211_sdata_running(sdata)) 6467 ieee80211_restart_sta_timer(sdata); 6468 } 6469 rcu_read_unlock(); 6470 } 6471 6472 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6473 struct cfg80211_bss *cbss, s8 link_id, 6474 const u8 *ap_mld_addr, bool assoc, 6475 bool override) 6476 { 6477 struct ieee80211_local *local = sdata->local; 6478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6479 struct ieee80211_bss *bss = (void *)cbss->priv; 6480 struct sta_info *new_sta = NULL; 6481 struct ieee80211_link_data *link; 6482 bool have_sta = false; 6483 bool mlo; 6484 int err; 6485 6486 if (link_id >= 0) { 6487 mlo = true; 6488 if (WARN_ON(!ap_mld_addr)) 6489 return -EINVAL; 6490 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6491 } else { 6492 if (WARN_ON(ap_mld_addr)) 6493 return -EINVAL; 6494 ap_mld_addr = cbss->bssid; 6495 err = ieee80211_vif_set_links(sdata, 0); 6496 link_id = 0; 6497 mlo = false; 6498 } 6499 6500 if (err) 6501 return err; 6502 6503 link = sdata_dereference(sdata->link[link_id], sdata); 6504 if (WARN_ON(!link)) { 6505 err = -ENOLINK; 6506 goto out_err; 6507 } 6508 6509 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6510 err = -EINVAL; 6511 goto out_err; 6512 } 6513 6514 /* If a reconfig is happening, bail out */ 6515 if (local->in_reconfig) { 6516 err = -EBUSY; 6517 goto out_err; 6518 } 6519 6520 if (assoc) { 6521 rcu_read_lock(); 6522 have_sta = sta_info_get(sdata, ap_mld_addr); 6523 rcu_read_unlock(); 6524 } 6525 6526 if (!have_sta) { 6527 if (mlo) 6528 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6529 link_id, cbss->bssid, 6530 GFP_KERNEL); 6531 else 6532 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6533 6534 if (!new_sta) { 6535 err = -ENOMEM; 6536 goto out_err; 6537 } 6538 6539 new_sta->sta.mlo = mlo; 6540 } 6541 6542 /* 6543 * Set up the information for the new channel before setting the 6544 * new channel. We can't - completely race-free - change the basic 6545 * rates bitmap and the channel (sband) that it refers to, but if 6546 * we set it up before we at least avoid calling into the driver's 6547 * bss_info_changed() method with invalid information (since we do 6548 * call that from changing the channel - only for IDLE and perhaps 6549 * some others, but ...). 6550 * 6551 * So to avoid that, just set up all the new information before the 6552 * channel, but tell the driver to apply it only afterwards, since 6553 * it might need the new channel for that. 6554 */ 6555 if (new_sta) { 6556 const struct cfg80211_bss_ies *ies; 6557 struct link_sta_info *link_sta; 6558 6559 rcu_read_lock(); 6560 link_sta = rcu_dereference(new_sta->link[link_id]); 6561 if (WARN_ON(!link_sta)) { 6562 rcu_read_unlock(); 6563 sta_info_free(local, new_sta); 6564 err = -EINVAL; 6565 goto out_err; 6566 } 6567 6568 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6569 link_sta, cbss); 6570 if (err) { 6571 rcu_read_unlock(); 6572 sta_info_free(local, new_sta); 6573 goto out_err; 6574 } 6575 6576 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6577 6578 /* set timing information */ 6579 link->conf->beacon_int = cbss->beacon_interval; 6580 ies = rcu_dereference(cbss->beacon_ies); 6581 if (ies) { 6582 link->conf->sync_tsf = ies->tsf; 6583 link->conf->sync_device_ts = 6584 bss->device_ts_beacon; 6585 6586 ieee80211_get_dtim(ies, 6587 &link->conf->sync_dtim_count, 6588 NULL); 6589 } else if (!ieee80211_hw_check(&sdata->local->hw, 6590 TIMING_BEACON_ONLY)) { 6591 ies = rcu_dereference(cbss->proberesp_ies); 6592 /* must be non-NULL since beacon IEs were NULL */ 6593 link->conf->sync_tsf = ies->tsf; 6594 link->conf->sync_device_ts = 6595 bss->device_ts_presp; 6596 link->conf->sync_dtim_count = 0; 6597 } else { 6598 link->conf->sync_tsf = 0; 6599 link->conf->sync_device_ts = 0; 6600 link->conf->sync_dtim_count = 0; 6601 } 6602 rcu_read_unlock(); 6603 } 6604 6605 if (new_sta || override) { 6606 err = ieee80211_prep_channel(sdata, link, cbss, 6607 &link->u.mgd.conn_flags); 6608 if (err) { 6609 if (new_sta) 6610 sta_info_free(local, new_sta); 6611 goto out_err; 6612 } 6613 } 6614 6615 if (new_sta) { 6616 /* 6617 * tell driver about BSSID, basic rates and timing 6618 * this was set up above, before setting the channel 6619 */ 6620 ieee80211_link_info_change_notify(sdata, link, 6621 BSS_CHANGED_BSSID | 6622 BSS_CHANGED_BASIC_RATES | 6623 BSS_CHANGED_BEACON_INT); 6624 6625 if (assoc) 6626 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6627 6628 err = sta_info_insert(new_sta); 6629 new_sta = NULL; 6630 if (err) { 6631 sdata_info(sdata, 6632 "failed to insert STA entry for the AP (error %d)\n", 6633 err); 6634 goto out_err; 6635 } 6636 } else 6637 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6638 6639 /* Cancel scan to ensure that nothing interferes with connection */ 6640 if (local->scanning) 6641 ieee80211_scan_cancel(local); 6642 6643 return 0; 6644 6645 out_err: 6646 ieee80211_link_release_channel(&sdata->deflink); 6647 ieee80211_vif_set_links(sdata, 0); 6648 return err; 6649 } 6650 6651 /* config hooks */ 6652 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6653 struct cfg80211_auth_request *req) 6654 { 6655 struct ieee80211_local *local = sdata->local; 6656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6657 struct ieee80211_mgd_auth_data *auth_data; 6658 u16 auth_alg; 6659 int err; 6660 bool cont_auth; 6661 6662 /* prepare auth data structure */ 6663 6664 switch (req->auth_type) { 6665 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6666 auth_alg = WLAN_AUTH_OPEN; 6667 break; 6668 case NL80211_AUTHTYPE_SHARED_KEY: 6669 if (fips_enabled) 6670 return -EOPNOTSUPP; 6671 auth_alg = WLAN_AUTH_SHARED_KEY; 6672 break; 6673 case NL80211_AUTHTYPE_FT: 6674 auth_alg = WLAN_AUTH_FT; 6675 break; 6676 case NL80211_AUTHTYPE_NETWORK_EAP: 6677 auth_alg = WLAN_AUTH_LEAP; 6678 break; 6679 case NL80211_AUTHTYPE_SAE: 6680 auth_alg = WLAN_AUTH_SAE; 6681 break; 6682 case NL80211_AUTHTYPE_FILS_SK: 6683 auth_alg = WLAN_AUTH_FILS_SK; 6684 break; 6685 case NL80211_AUTHTYPE_FILS_SK_PFS: 6686 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6687 break; 6688 case NL80211_AUTHTYPE_FILS_PK: 6689 auth_alg = WLAN_AUTH_FILS_PK; 6690 break; 6691 default: 6692 return -EOPNOTSUPP; 6693 } 6694 6695 if (ifmgd->assoc_data) 6696 return -EBUSY; 6697 6698 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6699 req->ie_len, GFP_KERNEL); 6700 if (!auth_data) 6701 return -ENOMEM; 6702 6703 memcpy(auth_data->ap_addr, 6704 req->ap_mld_addr ?: req->bss->bssid, 6705 ETH_ALEN); 6706 auth_data->bss = req->bss; 6707 auth_data->link_id = req->link_id; 6708 6709 if (req->auth_data_len >= 4) { 6710 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6711 __le16 *pos = (__le16 *) req->auth_data; 6712 6713 auth_data->sae_trans = le16_to_cpu(pos[0]); 6714 auth_data->sae_status = le16_to_cpu(pos[1]); 6715 } 6716 memcpy(auth_data->data, req->auth_data + 4, 6717 req->auth_data_len - 4); 6718 auth_data->data_len += req->auth_data_len - 4; 6719 } 6720 6721 /* Check if continuing authentication or trying to authenticate with the 6722 * same BSS that we were in the process of authenticating with and avoid 6723 * removal and re-addition of the STA entry in 6724 * ieee80211_prep_connection(). 6725 */ 6726 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 6727 ifmgd->auth_data->link_id == req->link_id; 6728 6729 if (req->ie && req->ie_len) { 6730 memcpy(&auth_data->data[auth_data->data_len], 6731 req->ie, req->ie_len); 6732 auth_data->data_len += req->ie_len; 6733 } 6734 6735 if (req->key && req->key_len) { 6736 auth_data->key_len = req->key_len; 6737 auth_data->key_idx = req->key_idx; 6738 memcpy(auth_data->key, req->key, req->key_len); 6739 } 6740 6741 auth_data->algorithm = auth_alg; 6742 6743 /* try to authenticate/probe */ 6744 6745 if (ifmgd->auth_data) { 6746 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6747 auth_data->peer_confirmed = 6748 ifmgd->auth_data->peer_confirmed; 6749 } 6750 ieee80211_destroy_auth_data(sdata, cont_auth); 6751 } 6752 6753 /* prep auth_data so we don't go into idle on disassoc */ 6754 ifmgd->auth_data = auth_data; 6755 6756 /* If this is continuation of an ongoing SAE authentication exchange 6757 * (i.e., request to send SAE Confirm) and the peer has already 6758 * confirmed, mark authentication completed since we are about to send 6759 * out SAE Confirm. 6760 */ 6761 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6762 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6763 ieee80211_mark_sta_auth(sdata); 6764 6765 if (ifmgd->associated) { 6766 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6767 6768 sdata_info(sdata, 6769 "disconnect from AP %pM for new auth to %pM\n", 6770 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6771 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6772 WLAN_REASON_UNSPECIFIED, 6773 false, frame_buf); 6774 6775 ieee80211_report_disconnect(sdata, frame_buf, 6776 sizeof(frame_buf), true, 6777 WLAN_REASON_UNSPECIFIED, 6778 false); 6779 } 6780 6781 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6782 6783 /* needed for transmitting the auth frame(s) properly */ 6784 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6785 6786 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6787 req->ap_mld_addr, cont_auth, false); 6788 if (err) 6789 goto err_clear; 6790 6791 err = ieee80211_auth(sdata); 6792 if (err) { 6793 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6794 goto err_clear; 6795 } 6796 6797 /* hold our own reference */ 6798 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6799 return 0; 6800 6801 err_clear: 6802 if (!sdata->vif.valid_links) { 6803 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6804 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6805 BSS_CHANGED_BSSID); 6806 mutex_lock(&sdata->local->mtx); 6807 ieee80211_link_release_channel(&sdata->deflink); 6808 mutex_unlock(&sdata->local->mtx); 6809 } 6810 ifmgd->auth_data = NULL; 6811 kfree(auth_data); 6812 return err; 6813 } 6814 6815 static ieee80211_conn_flags_t 6816 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6817 struct ieee80211_mgd_assoc_data *assoc_data, 6818 struct cfg80211_assoc_request *req, 6819 ieee80211_conn_flags_t conn_flags, 6820 unsigned int link_id) 6821 { 6822 struct ieee80211_local *local = sdata->local; 6823 const struct cfg80211_bss_ies *beacon_ies; 6824 struct ieee80211_supported_band *sband; 6825 const struct element *ht_elem, *vht_elem; 6826 struct ieee80211_link_data *link; 6827 struct cfg80211_bss *cbss; 6828 struct ieee80211_bss *bss; 6829 bool is_5ghz, is_6ghz; 6830 6831 cbss = assoc_data->link[link_id].bss; 6832 if (WARN_ON(!cbss)) 6833 return 0; 6834 6835 bss = (void *)cbss->priv; 6836 6837 sband = local->hw.wiphy->bands[cbss->channel->band]; 6838 if (WARN_ON(!sband)) 6839 return 0; 6840 6841 link = sdata_dereference(sdata->link[link_id], sdata); 6842 if (WARN_ON(!link)) 6843 return 0; 6844 6845 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6846 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6847 6848 /* for MLO connections assume advertising all rates is OK */ 6849 if (!req->ap_mld_addr) { 6850 assoc_data->supp_rates = bss->supp_rates; 6851 assoc_data->supp_rates_len = bss->supp_rates_len; 6852 } 6853 6854 /* copy and link elems for the STA profile */ 6855 if (req->links[link_id].elems_len) { 6856 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6857 req->links[link_id].elems_len); 6858 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6859 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6860 assoc_data->ie_pos += req->links[link_id].elems_len; 6861 } 6862 6863 rcu_read_lock(); 6864 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 6865 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6866 assoc_data->link[link_id].ap_ht_param = 6867 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6868 else if (!is_6ghz) 6869 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6870 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 6871 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6872 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 6873 sizeof(struct ieee80211_vht_cap)); 6874 } else if (is_5ghz) { 6875 link_info(link, 6876 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6877 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 6878 IEEE80211_CONN_DISABLE_HE | 6879 IEEE80211_CONN_DISABLE_EHT; 6880 } 6881 rcu_read_unlock(); 6882 6883 link->u.mgd.beacon_crc_valid = false; 6884 link->u.mgd.dtim_period = 0; 6885 link->u.mgd.have_beacon = false; 6886 6887 /* override HT/VHT configuration only if the AP and we support it */ 6888 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 6889 struct ieee80211_sta_ht_cap sta_ht_cap; 6890 6891 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6892 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6893 } 6894 6895 rcu_read_lock(); 6896 beacon_ies = rcu_dereference(cbss->beacon_ies); 6897 if (beacon_ies) { 6898 const struct element *elem; 6899 u8 dtim_count = 0; 6900 6901 ieee80211_get_dtim(beacon_ies, &dtim_count, 6902 &link->u.mgd.dtim_period); 6903 6904 sdata->deflink.u.mgd.have_beacon = true; 6905 6906 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6907 link->conf->sync_tsf = beacon_ies->tsf; 6908 link->conf->sync_device_ts = bss->device_ts_beacon; 6909 link->conf->sync_dtim_count = dtim_count; 6910 } 6911 6912 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6913 beacon_ies->data, beacon_ies->len); 6914 if (elem && elem->datalen >= 3) 6915 link->conf->profile_periodicity = elem->data[2]; 6916 else 6917 link->conf->profile_periodicity = 0; 6918 6919 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6920 beacon_ies->data, beacon_ies->len); 6921 if (elem && elem->datalen >= 11 && 6922 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6923 link->conf->ema_ap = true; 6924 else 6925 link->conf->ema_ap = false; 6926 } 6927 rcu_read_unlock(); 6928 6929 if (bss->corrupt_data) { 6930 char *corrupt_type = "data"; 6931 6932 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6933 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6934 corrupt_type = "beacon and probe response"; 6935 else 6936 corrupt_type = "beacon"; 6937 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 6938 corrupt_type = "probe response"; 6939 } 6940 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 6941 cbss->bssid, corrupt_type); 6942 } 6943 6944 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 6945 if (sdata->u.mgd.powersave) 6946 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 6947 else 6948 link->smps_mode = IEEE80211_SMPS_OFF; 6949 } else { 6950 link->smps_mode = link->u.mgd.req_smps; 6951 } 6952 6953 return conn_flags; 6954 } 6955 6956 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 6957 struct cfg80211_assoc_request *req) 6958 { 6959 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 6960 struct ieee80211_local *local = sdata->local; 6961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6962 struct ieee80211_mgd_assoc_data *assoc_data; 6963 const struct element *ssid_elem; 6964 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6965 ieee80211_conn_flags_t conn_flags = 0; 6966 struct ieee80211_link_data *link; 6967 struct cfg80211_bss *cbss; 6968 struct ieee80211_bss *bss; 6969 bool override; 6970 int i, err; 6971 size_t size = sizeof(*assoc_data) + req->ie_len; 6972 6973 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 6974 size += req->links[i].elems_len; 6975 6976 /* FIXME: no support for 4-addr MLO yet */ 6977 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 6978 return -EOPNOTSUPP; 6979 6980 assoc_data = kzalloc(size, GFP_KERNEL); 6981 if (!assoc_data) 6982 return -ENOMEM; 6983 6984 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 6985 6986 rcu_read_lock(); 6987 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 6988 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 6989 rcu_read_unlock(); 6990 kfree(assoc_data); 6991 return -EINVAL; 6992 } 6993 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 6994 assoc_data->ssid_len = ssid_elem->datalen; 6995 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 6996 vif_cfg->ssid_len = assoc_data->ssid_len; 6997 rcu_read_unlock(); 6998 6999 if (req->ap_mld_addr) { 7000 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 7001 if (!req->links[i].bss) 7002 continue; 7003 link = sdata_dereference(sdata->link[i], sdata); 7004 if (link) 7005 ether_addr_copy(assoc_data->link[i].addr, 7006 link->conf->addr); 7007 else 7008 eth_random_addr(assoc_data->link[i].addr); 7009 } 7010 } else { 7011 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 7012 } 7013 7014 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 7015 7016 memcpy(assoc_data->ap_addr, 7017 req->ap_mld_addr ?: req->bss->bssid, 7018 ETH_ALEN); 7019 7020 if (ifmgd->associated) { 7021 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7022 7023 sdata_info(sdata, 7024 "disconnect from AP %pM for new assoc to %pM\n", 7025 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 7026 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7027 WLAN_REASON_UNSPECIFIED, 7028 false, frame_buf); 7029 7030 ieee80211_report_disconnect(sdata, frame_buf, 7031 sizeof(frame_buf), true, 7032 WLAN_REASON_UNSPECIFIED, 7033 false); 7034 } 7035 7036 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 7037 err = -EBUSY; 7038 goto err_free; 7039 } 7040 7041 if (ifmgd->assoc_data) { 7042 err = -EBUSY; 7043 goto err_free; 7044 } 7045 7046 if (ifmgd->auth_data) { 7047 bool match; 7048 7049 /* keep sta info, bssid if matching */ 7050 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 7051 assoc_data->ap_addr) && 7052 ifmgd->auth_data->link_id == req->link_id; 7053 ieee80211_destroy_auth_data(sdata, match); 7054 } 7055 7056 /* prepare assoc data */ 7057 7058 bss = (void *)cbss->priv; 7059 assoc_data->wmm = bss->wmm_used && 7060 (local->hw.queues >= IEEE80211_NUM_ACS); 7061 7062 /* 7063 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 7064 * We still associate in non-HT mode (11a/b/g) if any one of these 7065 * ciphers is configured as pairwise. 7066 * We can set this to true for non-11n hardware, that'll be checked 7067 * separately along with the peer capabilities. 7068 */ 7069 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7070 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7071 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7072 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7073 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7074 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7075 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7076 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7077 netdev_info(sdata->dev, 7078 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7079 } 7080 } 7081 7082 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7083 if (!bss->wmm_used) { 7084 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7085 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7086 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7087 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7088 netdev_info(sdata->dev, 7089 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7090 } 7091 7092 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7093 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7094 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7095 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7096 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7097 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7098 } 7099 7100 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7101 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7102 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7103 } 7104 7105 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7106 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7107 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7108 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7109 } 7110 7111 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7112 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7113 7114 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7115 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7116 sizeof(ifmgd->ht_capa_mask)); 7117 7118 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7119 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7120 sizeof(ifmgd->vht_capa_mask)); 7121 7122 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7123 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7124 sizeof(ifmgd->s1g_capa_mask)); 7125 7126 if (req->ie && req->ie_len) { 7127 memcpy(assoc_data->ie, req->ie, req->ie_len); 7128 assoc_data->ie_len = req->ie_len; 7129 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7130 } else { 7131 assoc_data->ie_pos = assoc_data->ie; 7132 } 7133 7134 if (req->fils_kek) { 7135 /* should already be checked in cfg80211 - so warn */ 7136 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7137 err = -EINVAL; 7138 goto err_free; 7139 } 7140 memcpy(assoc_data->fils_kek, req->fils_kek, 7141 req->fils_kek_len); 7142 assoc_data->fils_kek_len = req->fils_kek_len; 7143 } 7144 7145 if (req->fils_nonces) 7146 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7147 2 * FILS_NONCE_LEN); 7148 7149 /* default timeout */ 7150 assoc_data->timeout = jiffies; 7151 assoc_data->timeout_started = true; 7152 7153 assoc_data->assoc_link_id = assoc_link_id; 7154 7155 if (req->ap_mld_addr) { 7156 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7157 assoc_data->link[i].conn_flags = conn_flags; 7158 assoc_data->link[i].bss = req->links[i].bss; 7159 } 7160 7161 /* if there was no authentication, set up the link */ 7162 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7163 if (err) 7164 goto err_clear; 7165 } else { 7166 assoc_data->link[0].conn_flags = conn_flags; 7167 assoc_data->link[0].bss = cbss; 7168 } 7169 7170 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7171 if (WARN_ON(!link)) { 7172 err = -EINVAL; 7173 goto err_clear; 7174 } 7175 7176 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7177 conn_flags |= link->u.mgd.conn_flags; 7178 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7179 conn_flags, assoc_link_id); 7180 override = link->u.mgd.conn_flags != conn_flags; 7181 link->u.mgd.conn_flags |= conn_flags; 7182 7183 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7184 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7185 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7186 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7187 7188 if (bss->wmm_used && bss->uapsd_supported && 7189 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7190 assoc_data->uapsd = true; 7191 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7192 } else { 7193 assoc_data->uapsd = false; 7194 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7195 } 7196 7197 if (req->prev_bssid) 7198 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7199 7200 if (req->use_mfp) { 7201 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7202 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7203 } else { 7204 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7205 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7206 } 7207 7208 if (req->flags & ASSOC_REQ_USE_RRM) 7209 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7210 else 7211 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7212 7213 if (req->crypto.control_port) 7214 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7215 else 7216 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7217 7218 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7219 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7220 sdata->control_port_over_nl80211 = 7221 req->crypto.control_port_over_nl80211; 7222 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7223 7224 /* kick off associate process */ 7225 ifmgd->assoc_data = assoc_data; 7226 7227 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7228 if (!assoc_data->link[i].bss) 7229 continue; 7230 if (i == assoc_data->assoc_link_id) 7231 continue; 7232 /* only calculate the flags, hence link == NULL */ 7233 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7234 &assoc_data->link[i].conn_flags); 7235 if (err) 7236 goto err_clear; 7237 } 7238 7239 /* needed for transmitting the assoc frames properly */ 7240 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7241 7242 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7243 req->ap_mld_addr, true, override); 7244 if (err) 7245 goto err_clear; 7246 7247 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7248 link->u.mgd.conn_flags; 7249 7250 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7251 const struct cfg80211_bss_ies *beacon_ies; 7252 7253 rcu_read_lock(); 7254 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7255 7256 if (beacon_ies) { 7257 /* 7258 * Wait up to one beacon interval ... 7259 * should this be more if we miss one? 7260 */ 7261 sdata_info(sdata, "waiting for beacon from %pM\n", 7262 link->u.mgd.bssid); 7263 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7264 assoc_data->timeout_started = true; 7265 assoc_data->need_beacon = true; 7266 } 7267 rcu_read_unlock(); 7268 } 7269 7270 run_again(sdata, assoc_data->timeout); 7271 7272 return 0; 7273 err_clear: 7274 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7275 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7276 BSS_CHANGED_BSSID); 7277 ifmgd->assoc_data = NULL; 7278 err_free: 7279 kfree(assoc_data); 7280 return err; 7281 } 7282 7283 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7284 struct cfg80211_deauth_request *req) 7285 { 7286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7287 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7288 bool tx = !req->local_state_change; 7289 struct ieee80211_prep_tx_info info = { 7290 .subtype = IEEE80211_STYPE_DEAUTH, 7291 }; 7292 7293 if (ifmgd->auth_data && 7294 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7295 sdata_info(sdata, 7296 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7297 req->bssid, req->reason_code, 7298 ieee80211_get_reason_code_string(req->reason_code)); 7299 7300 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7301 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7302 IEEE80211_STYPE_DEAUTH, 7303 req->reason_code, tx, 7304 frame_buf); 7305 ieee80211_destroy_auth_data(sdata, false); 7306 ieee80211_report_disconnect(sdata, frame_buf, 7307 sizeof(frame_buf), true, 7308 req->reason_code, false); 7309 drv_mgd_complete_tx(sdata->local, sdata, &info); 7310 return 0; 7311 } 7312 7313 if (ifmgd->assoc_data && 7314 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7315 sdata_info(sdata, 7316 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7317 req->bssid, req->reason_code, 7318 ieee80211_get_reason_code_string(req->reason_code)); 7319 7320 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7321 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7322 IEEE80211_STYPE_DEAUTH, 7323 req->reason_code, tx, 7324 frame_buf); 7325 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7326 ieee80211_report_disconnect(sdata, frame_buf, 7327 sizeof(frame_buf), true, 7328 req->reason_code, false); 7329 return 0; 7330 } 7331 7332 if (ifmgd->associated && 7333 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7334 sdata_info(sdata, 7335 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7336 req->bssid, req->reason_code, 7337 ieee80211_get_reason_code_string(req->reason_code)); 7338 7339 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7340 req->reason_code, tx, frame_buf); 7341 ieee80211_report_disconnect(sdata, frame_buf, 7342 sizeof(frame_buf), true, 7343 req->reason_code, false); 7344 drv_mgd_complete_tx(sdata->local, sdata, &info); 7345 return 0; 7346 } 7347 7348 return -ENOTCONN; 7349 } 7350 7351 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7352 struct cfg80211_disassoc_request *req) 7353 { 7354 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7355 7356 if (!sdata->u.mgd.associated || 7357 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7358 return -ENOTCONN; 7359 7360 sdata_info(sdata, 7361 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7362 req->ap_addr, req->reason_code, 7363 ieee80211_get_reason_code_string(req->reason_code)); 7364 7365 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7366 req->reason_code, !req->local_state_change, 7367 frame_buf); 7368 7369 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7370 req->reason_code, false); 7371 7372 return 0; 7373 } 7374 7375 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7376 { 7377 cancel_work_sync(&link->u.mgd.request_smps_work); 7378 cancel_work_sync(&link->u.mgd.chswitch_work); 7379 } 7380 7381 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7382 { 7383 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7384 7385 /* 7386 * Make sure some work items will not run after this, 7387 * they will not do anything but might not have been 7388 * cancelled when disconnecting. 7389 */ 7390 cancel_work_sync(&ifmgd->monitor_work); 7391 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7392 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7393 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7394 7395 sdata_lock(sdata); 7396 if (ifmgd->assoc_data) 7397 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7398 if (ifmgd->auth_data) 7399 ieee80211_destroy_auth_data(sdata, false); 7400 spin_lock_bh(&ifmgd->teardown_lock); 7401 if (ifmgd->teardown_skb) { 7402 kfree_skb(ifmgd->teardown_skb); 7403 ifmgd->teardown_skb = NULL; 7404 ifmgd->orig_teardown_skb = NULL; 7405 } 7406 kfree(ifmgd->assoc_req_ies); 7407 ifmgd->assoc_req_ies = NULL; 7408 ifmgd->assoc_req_ies_len = 0; 7409 spin_unlock_bh(&ifmgd->teardown_lock); 7410 del_timer_sync(&ifmgd->timer); 7411 sdata_unlock(sdata); 7412 } 7413 7414 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7415 enum nl80211_cqm_rssi_threshold_event rssi_event, 7416 s32 rssi_level, 7417 gfp_t gfp) 7418 { 7419 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7420 7421 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7422 7423 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7424 } 7425 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7426 7427 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7428 { 7429 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7430 7431 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7432 7433 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7434 } 7435 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7436 7437 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7438 int rssi_min_thold, 7439 int rssi_max_thold) 7440 { 7441 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7442 7443 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7444 return; 7445 7446 /* 7447 * Scale up threshold values before storing it, as the RSSI averaging 7448 * algorithm uses a scaled up value as well. Change this scaling 7449 * factor if the RSSI averaging algorithm changes. 7450 */ 7451 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7452 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7453 } 7454 7455 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7456 int rssi_min_thold, 7457 int rssi_max_thold) 7458 { 7459 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7460 7461 WARN_ON(rssi_min_thold == rssi_max_thold || 7462 rssi_min_thold > rssi_max_thold); 7463 7464 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7465 rssi_max_thold); 7466 } 7467 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7468 7469 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7470 { 7471 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7472 7473 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7474 } 7475 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7476