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(sdata, 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 ieee80211_conn_flags_t conn_flags) 699 { 700 u8 *pos, *pre_he_pos; 701 const struct ieee80211_sta_he_cap *he_cap; 702 u8 he_cap_size; 703 704 he_cap = ieee80211_get_he_iftype_cap(sband, 705 ieee80211_vif_type_p2p(&sdata->vif)); 706 if (WARN_ON(!he_cap)) 707 return; 708 709 /* get a max size estimate */ 710 he_cap_size = 711 2 + 1 + sizeof(he_cap->he_cap_elem) + 712 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 713 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 714 he_cap->he_cap_elem.phy_cap_info); 715 pos = skb_put(skb, he_cap_size); 716 pre_he_pos = pos; 717 pos = ieee80211_ie_build_he_cap(conn_flags, 718 pos, he_cap, pos + he_cap_size); 719 /* trim excess if any */ 720 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 721 722 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 723 } 724 725 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 726 struct sk_buff *skb, 727 struct ieee80211_supported_band *sband) 728 { 729 u8 *pos; 730 const struct ieee80211_sta_he_cap *he_cap; 731 const struct ieee80211_sta_eht_cap *eht_cap; 732 u8 eht_cap_size; 733 734 he_cap = ieee80211_get_he_iftype_cap(sband, 735 ieee80211_vif_type_p2p(&sdata->vif)); 736 eht_cap = ieee80211_get_eht_iftype_cap(sband, 737 ieee80211_vif_type_p2p(&sdata->vif)); 738 739 /* 740 * EHT capabilities element is only added if the HE capabilities element 741 * was added so assume that 'he_cap' is valid and don't check it. 742 */ 743 if (WARN_ON(!he_cap || !eht_cap)) 744 return; 745 746 eht_cap_size = 747 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 748 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 749 &eht_cap->eht_cap_elem) + 750 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 751 eht_cap->eht_cap_elem.phy_cap_info); 752 pos = skb_put(skb, eht_cap_size); 753 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size); 754 } 755 756 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 757 enum nl80211_chan_width width, 758 struct ieee80211_supported_band *sband, 759 struct ieee80211_mgd_assoc_data *assoc_data) 760 { 761 unsigned int shift = ieee80211_chanwidth_get_shift(width); 762 unsigned int rates_len, supp_rates_len; 763 u32 rates = 0; 764 int i, count; 765 u8 *pos; 766 767 if (assoc_data->supp_rates_len) { 768 /* 769 * Get all rates supported by the device and the AP as 770 * some APs don't like getting a superset of their rates 771 * in the association request (e.g. D-Link DAP 1353 in 772 * b-only mode)... 773 */ 774 rates_len = ieee80211_parse_bitrates(width, sband, 775 assoc_data->supp_rates, 776 assoc_data->supp_rates_len, 777 &rates); 778 } else { 779 /* 780 * In case AP not provide any supported rates information 781 * before association, we send information element(s) with 782 * all rates that we support. 783 */ 784 rates_len = sband->n_bitrates; 785 for (i = 0; i < sband->n_bitrates; i++) 786 rates |= BIT(i); 787 } 788 789 supp_rates_len = rates_len; 790 if (supp_rates_len > 8) 791 supp_rates_len = 8; 792 793 pos = skb_put(skb, supp_rates_len + 2); 794 *pos++ = WLAN_EID_SUPP_RATES; 795 *pos++ = supp_rates_len; 796 797 count = 0; 798 for (i = 0; i < sband->n_bitrates; i++) { 799 if (BIT(i) & rates) { 800 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 801 5 * (1 << shift)); 802 *pos++ = (u8)rate; 803 if (++count == 8) 804 break; 805 } 806 } 807 808 if (rates_len > count) { 809 pos = skb_put(skb, rates_len - count + 2); 810 *pos++ = WLAN_EID_EXT_SUPP_RATES; 811 *pos++ = rates_len - count; 812 813 for (i++; i < sband->n_bitrates; i++) { 814 if (BIT(i) & rates) { 815 int rate; 816 817 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 818 5 * (1 << shift)); 819 *pos++ = (u8)rate; 820 } 821 } 822 } 823 } 824 825 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 826 const u8 *elems, 827 size_t elems_len, 828 size_t offset) 829 { 830 size_t noffset; 831 832 static const u8 before_ht[] = { 833 WLAN_EID_SSID, 834 WLAN_EID_SUPP_RATES, 835 WLAN_EID_EXT_SUPP_RATES, 836 WLAN_EID_PWR_CAPABILITY, 837 WLAN_EID_SUPPORTED_CHANNELS, 838 WLAN_EID_RSN, 839 WLAN_EID_QOS_CAPA, 840 WLAN_EID_RRM_ENABLED_CAPABILITIES, 841 WLAN_EID_MOBILITY_DOMAIN, 842 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 843 WLAN_EID_RIC_DATA, /* reassoc only */ 844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 845 }; 846 static const u8 after_ric[] = { 847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 848 WLAN_EID_HT_CAPABILITY, 849 WLAN_EID_BSS_COEX_2040, 850 /* luckily this is almost always there */ 851 WLAN_EID_EXT_CAPABILITY, 852 WLAN_EID_QOS_TRAFFIC_CAPA, 853 WLAN_EID_TIM_BCAST_REQ, 854 WLAN_EID_INTERWORKING, 855 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 856 WLAN_EID_VHT_CAPABILITY, 857 WLAN_EID_OPMODE_NOTIF, 858 }; 859 860 if (!elems_len) 861 return offset; 862 863 noffset = ieee80211_ie_split_ric(elems, elems_len, 864 before_ht, 865 ARRAY_SIZE(before_ht), 866 after_ric, 867 ARRAY_SIZE(after_ric), 868 offset); 869 skb_put_data(skb, elems + offset, noffset - offset); 870 871 return noffset; 872 } 873 874 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 875 const u8 *elems, 876 size_t elems_len, 877 size_t offset) 878 { 879 static const u8 before_vht[] = { 880 /* 881 * no need to list the ones split off before HT 882 * or generated here 883 */ 884 WLAN_EID_BSS_COEX_2040, 885 WLAN_EID_EXT_CAPABILITY, 886 WLAN_EID_QOS_TRAFFIC_CAPA, 887 WLAN_EID_TIM_BCAST_REQ, 888 WLAN_EID_INTERWORKING, 889 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 890 }; 891 size_t noffset; 892 893 if (!elems_len) 894 return offset; 895 896 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 897 noffset = ieee80211_ie_split(elems, elems_len, 898 before_vht, ARRAY_SIZE(before_vht), 899 offset); 900 skb_put_data(skb, elems + offset, noffset - offset); 901 902 return noffset; 903 } 904 905 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 906 const u8 *elems, 907 size_t elems_len, 908 size_t offset) 909 { 910 static const u8 before_he[] = { 911 /* 912 * no need to list the ones split off before VHT 913 * or generated here 914 */ 915 WLAN_EID_OPMODE_NOTIF, 916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 917 /* 11ai elements */ 918 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 919 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 920 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 921 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 922 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 923 /* TODO: add 11ah/11aj/11ak elements */ 924 }; 925 size_t noffset; 926 927 if (!elems_len) 928 return offset; 929 930 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 931 noffset = ieee80211_ie_split(elems, elems_len, 932 before_he, ARRAY_SIZE(before_he), 933 offset); 934 skb_put_data(skb, elems + offset, noffset - offset); 935 936 return noffset; 937 } 938 939 #define PRESENT_ELEMS_MAX 8 940 #define PRESENT_ELEM_EXT_OFFS 0x100 941 942 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 943 struct sk_buff *skb, u16 capab, 944 const struct element *ext_capa, 945 const u16 *present_elems); 946 947 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 948 struct sk_buff *skb, u16 *capab, 949 const struct element *ext_capa, 950 const u8 *extra_elems, 951 size_t extra_elems_len, 952 unsigned int link_id, 953 struct ieee80211_link_data *link, 954 u16 *present_elems) 955 { 956 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 958 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 959 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 960 struct ieee80211_channel *chan = cbss->channel; 961 const struct ieee80211_sband_iftype_data *iftd; 962 struct ieee80211_local *local = sdata->local; 963 struct ieee80211_supported_band *sband; 964 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 965 struct ieee80211_chanctx_conf *chanctx_conf; 966 enum ieee80211_smps_mode smps_mode; 967 u16 orig_capab = *capab; 968 size_t offset = 0; 969 int present_elems_len = 0; 970 u8 *pos; 971 int i; 972 973 #define ADD_PRESENT_ELEM(id) do { \ 974 /* need a last for termination - we use 0 == SSID */ \ 975 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 976 present_elems[present_elems_len++] = (id); \ 977 } while (0) 978 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 979 980 if (link) 981 smps_mode = link->smps_mode; 982 else if (sdata->u.mgd.powersave) 983 smps_mode = IEEE80211_SMPS_DYNAMIC; 984 else 985 smps_mode = IEEE80211_SMPS_OFF; 986 987 if (link) { 988 /* 989 * 5/10 MHz scenarios are only viable without MLO, in which 990 * case this pointer should be used ... All of this is a bit 991 * unclear though, not sure this even works at all. 992 */ 993 rcu_read_lock(); 994 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 995 if (chanctx_conf) 996 width = chanctx_conf->def.width; 997 rcu_read_unlock(); 998 } 999 1000 sband = local->hw.wiphy->bands[chan->band]; 1001 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1002 1003 if (sband->band == NL80211_BAND_2GHZ) { 1004 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1005 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1006 } 1007 1008 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1009 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1010 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1011 1012 if (sband->band != NL80211_BAND_S1GHZ) 1013 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1014 1015 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1016 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1017 struct cfg80211_chan_def chandef = { 1018 .width = width, 1019 .chan = chan, 1020 }; 1021 1022 pos = skb_put(skb, 4); 1023 *pos++ = WLAN_EID_PWR_CAPABILITY; 1024 *pos++ = 2; 1025 *pos++ = 0; /* min tx power */ 1026 /* max tx power */ 1027 *pos++ = ieee80211_chandef_max_power(&chandef); 1028 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1029 } 1030 1031 /* 1032 * Per spec, we shouldn't include the list of channels if we advertise 1033 * support for extended channel switching, but we've always done that; 1034 * (for now?) apply this restriction only on the (new) 6 GHz band. 1035 */ 1036 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1037 (sband->band != NL80211_BAND_6GHZ || 1038 !ext_capa || ext_capa->datalen < 1 || 1039 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1040 /* TODO: get this in reg domain format */ 1041 pos = skb_put(skb, 2 * sband->n_channels + 2); 1042 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1043 *pos++ = 2 * sband->n_channels; 1044 for (i = 0; i < sband->n_channels; i++) { 1045 int cf = sband->channels[i].center_freq; 1046 1047 *pos++ = ieee80211_frequency_to_channel(cf); 1048 *pos++ = 1; /* one channel in the subband*/ 1049 } 1050 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1051 } 1052 1053 /* if present, add any custom IEs that go before HT */ 1054 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1055 extra_elems_len, 1056 offset); 1057 1058 if (sband->band != NL80211_BAND_6GHZ && 1059 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1060 ieee80211_add_ht_ie(sdata, skb, 1061 assoc_data->link[link_id].ap_ht_param, 1062 sband, chan, smps_mode, 1063 assoc_data->link[link_id].conn_flags); 1064 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1065 } 1066 1067 /* if present, add any custom IEs that go before VHT */ 1068 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1069 extra_elems_len, 1070 offset); 1071 1072 if (sband->band != NL80211_BAND_6GHZ && 1073 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1074 bool mu_mimo_owner = 1075 ieee80211_add_vht_ie(sdata, skb, sband, 1076 &assoc_data->link[link_id].ap_vht_cap, 1077 assoc_data->link[link_id].conn_flags); 1078 1079 if (link) 1080 link->conf->mu_mimo_owner = mu_mimo_owner; 1081 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1082 } 1083 1084 /* 1085 * If AP doesn't support HT, mark HE and EHT as disabled. 1086 * If on the 5GHz band, make sure it supports VHT. 1087 */ 1088 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1089 (sband->band == NL80211_BAND_5GHZ && 1090 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1091 assoc_data->link[link_id].conn_flags |= 1092 IEEE80211_CONN_DISABLE_HE | 1093 IEEE80211_CONN_DISABLE_EHT; 1094 1095 /* if present, add any custom IEs that go before HE */ 1096 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1097 extra_elems_len, 1098 offset); 1099 1100 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1101 ieee80211_add_he_ie(sdata, skb, sband, 1102 assoc_data->link[link_id].conn_flags); 1103 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1104 } 1105 1106 /* 1107 * careful - need to know about all the present elems before 1108 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1109 * we're going to put it after the ML element 1110 */ 1111 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1112 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1113 1114 if (link_id == assoc_data->assoc_link_id) 1115 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1116 present_elems); 1117 1118 /* crash if somebody gets it wrong */ 1119 present_elems = NULL; 1120 1121 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1122 ieee80211_add_eht_ie(sdata, skb, sband); 1123 1124 if (sband->band == NL80211_BAND_S1GHZ) { 1125 ieee80211_add_aid_request_ie(sdata, skb); 1126 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1127 } 1128 1129 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1130 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1131 1132 if (link) 1133 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1134 1135 return offset; 1136 } 1137 1138 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1139 const u16 *outer, 1140 const u16 *inner) 1141 { 1142 unsigned int skb_len = skb->len; 1143 bool added = false; 1144 int i, j; 1145 u8 *len, *list_len = NULL; 1146 1147 skb_put_u8(skb, WLAN_EID_EXTENSION); 1148 len = skb_put(skb, 1); 1149 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1150 1151 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1152 u16 elem = outer[i]; 1153 bool have_inner = false; 1154 bool at_extension = false; 1155 1156 /* should at least be sorted in the sense of normal -> ext */ 1157 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1158 1159 /* switch to extension list */ 1160 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1161 at_extension = true; 1162 if (!list_len) 1163 skb_put_u8(skb, 0); 1164 list_len = NULL; 1165 } 1166 1167 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1168 if (elem == inner[j]) { 1169 have_inner = true; 1170 break; 1171 } 1172 } 1173 1174 if (have_inner) 1175 continue; 1176 1177 if (!list_len) { 1178 list_len = skb_put(skb, 1); 1179 *list_len = 0; 1180 } 1181 *list_len += 1; 1182 skb_put_u8(skb, (u8)elem); 1183 } 1184 1185 if (!added) 1186 skb_trim(skb, skb_len); 1187 else 1188 *len = skb->len - skb_len - 2; 1189 } 1190 1191 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1192 struct sk_buff *skb, u16 capab, 1193 const struct element *ext_capa, 1194 const u16 *outer_present_elems) 1195 { 1196 struct ieee80211_local *local = sdata->local; 1197 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1198 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1199 struct ieee80211_multi_link_elem *ml_elem; 1200 struct ieee80211_mle_basic_common_info *common; 1201 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1202 __le16 eml_capa = 0, mld_capa_ops = 0; 1203 unsigned int link_id; 1204 u8 *ml_elem_len; 1205 void *capab_pos; 1206 1207 if (!sdata->vif.valid_links) 1208 return; 1209 1210 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1211 ieee80211_vif_type_p2p(&sdata->vif)); 1212 if (ift_ext_capa) { 1213 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1214 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1215 } 1216 1217 skb_put_u8(skb, WLAN_EID_EXTENSION); 1218 ml_elem_len = skb_put(skb, 1); 1219 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1220 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1221 ml_elem->control = 1222 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1223 IEEE80211_MLC_BASIC_PRES_EML_CAPA | 1224 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1225 common = skb_put(skb, sizeof(*common)); 1226 common->len = sizeof(*common) + 1227 2 + /* EML capabilities */ 1228 2; /* MLD capa/ops */ 1229 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1230 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1231 /* need indication from userspace to support this */ 1232 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1233 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1234 1235 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1236 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1237 const u8 *extra_elems; 1238 size_t extra_elems_len; 1239 size_t extra_used; 1240 u8 *subelem_len = NULL; 1241 __le16 ctrl; 1242 1243 if (!assoc_data->link[link_id].bss || 1244 link_id == assoc_data->assoc_link_id) 1245 continue; 1246 1247 extra_elems = assoc_data->link[link_id].elems; 1248 extra_elems_len = assoc_data->link[link_id].elems_len; 1249 1250 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1251 subelem_len = skb_put(skb, 1); 1252 1253 ctrl = cpu_to_le16(link_id | 1254 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1255 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1256 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1257 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1258 skb_put_data(skb, assoc_data->link[link_id].addr, 1259 ETH_ALEN); 1260 /* 1261 * Now add the contents of the (re)association request, 1262 * but the "listen interval" and "current AP address" 1263 * (if applicable) are skipped. So we only have 1264 * the capability field (remember the position and fill 1265 * later), followed by the elements added below by 1266 * calling ieee80211_assoc_link_elems(). 1267 */ 1268 capab_pos = skb_put(skb, 2); 1269 1270 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1271 ext_capa, 1272 extra_elems, 1273 extra_elems_len, 1274 link_id, NULL, 1275 link_present_elems); 1276 if (extra_elems) 1277 skb_put_data(skb, extra_elems + extra_used, 1278 extra_elems_len - extra_used); 1279 1280 put_unaligned_le16(capab, capab_pos); 1281 1282 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1283 link_present_elems); 1284 1285 ieee80211_fragment_element(skb, subelem_len); 1286 } 1287 1288 ieee80211_fragment_element(skb, ml_elem_len); 1289 } 1290 1291 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1292 { 1293 struct ieee80211_local *local = sdata->local; 1294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1295 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1296 struct ieee80211_link_data *link; 1297 struct sk_buff *skb; 1298 struct ieee80211_mgmt *mgmt; 1299 u8 *pos, qos_info, *ie_start; 1300 size_t offset, noffset; 1301 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1302 __le16 listen_int; 1303 struct element *ext_capa = NULL; 1304 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1305 struct ieee80211_prep_tx_info info = {}; 1306 unsigned int link_id, n_links = 0; 1307 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1308 void *capab_pos; 1309 size_t size; 1310 int ret; 1311 1312 /* we know it's writable, cast away the const */ 1313 if (assoc_data->ie_len) 1314 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1315 assoc_data->ie, 1316 assoc_data->ie_len); 1317 1318 sdata_assert_lock(sdata); 1319 1320 size = local->hw.extra_tx_headroom + 1321 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1322 2 + assoc_data->ssid_len + /* SSID */ 1323 assoc_data->ie_len + /* extra IEs */ 1324 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1325 9; /* WMM */ 1326 1327 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1328 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1329 const struct ieee80211_sband_iftype_data *iftd; 1330 struct ieee80211_supported_band *sband; 1331 1332 if (!cbss) 1333 continue; 1334 1335 sband = local->hw.wiphy->bands[cbss->channel->band]; 1336 1337 n_links++; 1338 /* add STA profile elements length */ 1339 size += assoc_data->link[link_id].elems_len; 1340 /* and supported rates length */ 1341 size += 4 + sband->n_bitrates; 1342 /* supported channels */ 1343 size += 2 + 2 * sband->n_channels; 1344 1345 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1346 if (iftd) 1347 size += iftd->vendor_elems.len; 1348 1349 /* power capability */ 1350 size += 4; 1351 1352 /* HT, VHT, HE, EHT */ 1353 size += 2 + sizeof(struct ieee80211_ht_cap); 1354 size += 2 + sizeof(struct ieee80211_vht_cap); 1355 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1356 sizeof(struct ieee80211_he_mcs_nss_supp) + 1357 IEEE80211_HE_PPE_THRES_MAX_LEN; 1358 1359 if (sband->band == NL80211_BAND_6GHZ) 1360 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1361 1362 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1363 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1364 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1365 1366 /* non-inheritance element */ 1367 size += 2 + 2 + PRESENT_ELEMS_MAX; 1368 1369 /* should be the same across all BSSes */ 1370 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1371 capab |= WLAN_CAPABILITY_PRIVACY; 1372 } 1373 1374 if (sdata->vif.valid_links) { 1375 /* consider the multi-link element with STA profile */ 1376 size += sizeof(struct ieee80211_multi_link_elem); 1377 /* max common info field in basic multi-link element */ 1378 size += sizeof(struct ieee80211_mle_basic_common_info) + 1379 2 + /* capa & op */ 1380 2; /* EML capa */ 1381 1382 /* 1383 * The capability elements were already considered above; 1384 * note this over-estimates a bit because there's no 1385 * STA profile for the assoc link. 1386 */ 1387 size += (n_links - 1) * 1388 (1 + 1 + /* subelement ID/length */ 1389 2 + /* STA control */ 1390 1 + ETH_ALEN + 2 /* STA Info field */); 1391 } 1392 1393 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1394 if (WARN_ON(!link)) 1395 return -EINVAL; 1396 1397 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1398 return -EINVAL; 1399 1400 skb = alloc_skb(size, GFP_KERNEL); 1401 if (!skb) 1402 return -ENOMEM; 1403 1404 skb_reserve(skb, local->hw.extra_tx_headroom); 1405 1406 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1407 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1408 1409 /* Set MBSSID support for HE AP if needed */ 1410 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1411 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1412 ext_capa && ext_capa->datalen >= 3) 1413 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1414 1415 mgmt = skb_put_zero(skb, 24); 1416 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1417 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1418 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1419 1420 listen_int = cpu_to_le16(assoc_data->s1g ? 1421 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1422 local->hw.conf.listen_interval); 1423 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1424 skb_put(skb, 10); 1425 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1426 IEEE80211_STYPE_REASSOC_REQ); 1427 capab_pos = &mgmt->u.reassoc_req.capab_info; 1428 mgmt->u.reassoc_req.listen_interval = listen_int; 1429 memcpy(mgmt->u.reassoc_req.current_ap, 1430 assoc_data->prev_ap_addr, ETH_ALEN); 1431 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1432 } else { 1433 skb_put(skb, 4); 1434 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1435 IEEE80211_STYPE_ASSOC_REQ); 1436 capab_pos = &mgmt->u.assoc_req.capab_info; 1437 mgmt->u.assoc_req.listen_interval = listen_int; 1438 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1439 } 1440 1441 /* SSID */ 1442 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1443 ie_start = pos; 1444 *pos++ = WLAN_EID_SSID; 1445 *pos++ = assoc_data->ssid_len; 1446 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1447 1448 /* add the elements for the assoc (main) link */ 1449 link_capab = capab; 1450 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1451 ext_capa, 1452 assoc_data->ie, 1453 assoc_data->ie_len, 1454 assoc_data->assoc_link_id, link, 1455 present_elems); 1456 put_unaligned_le16(link_capab, capab_pos); 1457 1458 /* if present, add any custom non-vendor IEs */ 1459 if (assoc_data->ie_len) { 1460 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1461 assoc_data->ie_len, 1462 offset); 1463 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1464 offset = noffset; 1465 } 1466 1467 if (assoc_data->wmm) { 1468 if (assoc_data->uapsd) { 1469 qos_info = ifmgd->uapsd_queues; 1470 qos_info |= (ifmgd->uapsd_max_sp_len << 1471 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1472 } else { 1473 qos_info = 0; 1474 } 1475 1476 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1477 } 1478 1479 /* add any remaining custom (i.e. vendor specific here) IEs */ 1480 if (assoc_data->ie_len) { 1481 noffset = assoc_data->ie_len; 1482 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1483 } 1484 1485 if (assoc_data->fils_kek_len) { 1486 ret = fils_encrypt_assoc_req(skb, assoc_data); 1487 if (ret < 0) { 1488 dev_kfree_skb(skb); 1489 return ret; 1490 } 1491 } 1492 1493 pos = skb_tail_pointer(skb); 1494 kfree(ifmgd->assoc_req_ies); 1495 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1496 if (!ifmgd->assoc_req_ies) { 1497 dev_kfree_skb(skb); 1498 return -ENOMEM; 1499 } 1500 1501 ifmgd->assoc_req_ies_len = pos - ie_start; 1502 1503 drv_mgd_prepare_tx(local, sdata, &info); 1504 1505 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1506 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1507 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1508 IEEE80211_TX_INTFL_MLME_CONN_TX; 1509 ieee80211_tx_skb(sdata, skb); 1510 1511 return 0; 1512 } 1513 1514 void ieee80211_send_pspoll(struct ieee80211_local *local, 1515 struct ieee80211_sub_if_data *sdata) 1516 { 1517 struct ieee80211_pspoll *pspoll; 1518 struct sk_buff *skb; 1519 1520 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1521 if (!skb) 1522 return; 1523 1524 pspoll = (struct ieee80211_pspoll *) skb->data; 1525 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1526 1527 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1528 ieee80211_tx_skb(sdata, skb); 1529 } 1530 1531 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1532 struct ieee80211_sub_if_data *sdata, 1533 bool powersave) 1534 { 1535 struct sk_buff *skb; 1536 struct ieee80211_hdr_3addr *nullfunc; 1537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1538 1539 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1540 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1541 if (!skb) 1542 return; 1543 1544 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1545 if (powersave) 1546 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1547 1548 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1549 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1550 1551 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1552 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1553 1554 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1555 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1556 1557 ieee80211_tx_skb(sdata, skb); 1558 } 1559 1560 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1561 struct ieee80211_sub_if_data *sdata) 1562 { 1563 struct sk_buff *skb; 1564 struct ieee80211_hdr *nullfunc; 1565 __le16 fc; 1566 1567 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1568 return; 1569 1570 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1571 if (!skb) 1572 return; 1573 1574 skb_reserve(skb, local->hw.extra_tx_headroom); 1575 1576 nullfunc = skb_put_zero(skb, 30); 1577 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1578 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1579 nullfunc->frame_control = fc; 1580 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1581 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1582 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1583 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1584 1585 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1586 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1587 ieee80211_tx_skb(sdata, skb); 1588 } 1589 1590 /* spectrum management related things */ 1591 static void ieee80211_chswitch_work(struct work_struct *work) 1592 { 1593 struct ieee80211_link_data *link = 1594 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1595 struct ieee80211_sub_if_data *sdata = link->sdata; 1596 struct ieee80211_local *local = sdata->local; 1597 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1598 int ret; 1599 1600 if (!ieee80211_sdata_running(sdata)) 1601 return; 1602 1603 sdata_lock(sdata); 1604 mutex_lock(&local->mtx); 1605 mutex_lock(&local->chanctx_mtx); 1606 1607 if (!ifmgd->associated) 1608 goto out; 1609 1610 if (!link->conf->csa_active) 1611 goto out; 1612 1613 /* 1614 * using reservation isn't immediate as it may be deferred until later 1615 * with multi-vif. once reservation is complete it will re-schedule the 1616 * work with no reserved_chanctx so verify chandef to check if it 1617 * completed successfully 1618 */ 1619 1620 if (link->reserved_chanctx) { 1621 /* 1622 * with multi-vif csa driver may call ieee80211_csa_finish() 1623 * many times while waiting for other interfaces to use their 1624 * reservations 1625 */ 1626 if (link->reserved_ready) 1627 goto out; 1628 1629 ret = ieee80211_link_use_reserved_context(link); 1630 if (ret) { 1631 sdata_info(sdata, 1632 "failed to use reserved channel context, disconnecting (err=%d)\n", 1633 ret); 1634 ieee80211_queue_work(&sdata->local->hw, 1635 &ifmgd->csa_connection_drop_work); 1636 goto out; 1637 } 1638 1639 goto out; 1640 } 1641 1642 if (!cfg80211_chandef_identical(&link->conf->chandef, 1643 &link->csa_chandef)) { 1644 sdata_info(sdata, 1645 "failed to finalize channel switch, disconnecting\n"); 1646 ieee80211_queue_work(&sdata->local->hw, 1647 &ifmgd->csa_connection_drop_work); 1648 goto out; 1649 } 1650 1651 link->u.mgd.csa_waiting_bcn = true; 1652 1653 ieee80211_sta_reset_beacon_monitor(sdata); 1654 ieee80211_sta_reset_conn_monitor(sdata); 1655 1656 out: 1657 mutex_unlock(&local->chanctx_mtx); 1658 mutex_unlock(&local->mtx); 1659 sdata_unlock(sdata); 1660 } 1661 1662 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1663 { 1664 struct ieee80211_sub_if_data *sdata = link->sdata; 1665 struct ieee80211_local *local = sdata->local; 1666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1667 int ret; 1668 1669 sdata_assert_lock(sdata); 1670 1671 WARN_ON(!link->conf->csa_active); 1672 1673 if (link->csa_block_tx) { 1674 ieee80211_wake_vif_queues(local, sdata, 1675 IEEE80211_QUEUE_STOP_REASON_CSA); 1676 link->csa_block_tx = false; 1677 } 1678 1679 link->conf->csa_active = false; 1680 link->u.mgd.csa_waiting_bcn = false; 1681 /* 1682 * If the CSA IE is still present on the beacon after the switch, 1683 * we need to consider it as a new CSA (possibly to self). 1684 */ 1685 link->u.mgd.beacon_crc_valid = false; 1686 1687 ret = drv_post_channel_switch(sdata); 1688 if (ret) { 1689 sdata_info(sdata, 1690 "driver post channel switch failed, disconnecting\n"); 1691 ieee80211_queue_work(&local->hw, 1692 &ifmgd->csa_connection_drop_work); 1693 return; 1694 } 1695 1696 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0); 1697 } 1698 1699 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1700 { 1701 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1703 1704 if (WARN_ON(sdata->vif.valid_links)) 1705 success = false; 1706 1707 trace_api_chswitch_done(sdata, success); 1708 if (!success) { 1709 sdata_info(sdata, 1710 "driver channel switch failed, disconnecting\n"); 1711 ieee80211_queue_work(&sdata->local->hw, 1712 &ifmgd->csa_connection_drop_work); 1713 } else { 1714 ieee80211_queue_work(&sdata->local->hw, 1715 &sdata->deflink.u.mgd.chswitch_work); 1716 } 1717 } 1718 EXPORT_SYMBOL(ieee80211_chswitch_done); 1719 1720 static void ieee80211_chswitch_timer(struct timer_list *t) 1721 { 1722 struct ieee80211_link_data *link = 1723 from_timer(link, t, u.mgd.chswitch_timer); 1724 1725 ieee80211_queue_work(&link->sdata->local->hw, 1726 &link->u.mgd.chswitch_work); 1727 } 1728 1729 static void 1730 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1731 { 1732 struct ieee80211_sub_if_data *sdata = link->sdata; 1733 struct ieee80211_local *local = sdata->local; 1734 1735 if (!local->ops->abort_channel_switch) 1736 return; 1737 1738 mutex_lock(&local->mtx); 1739 1740 mutex_lock(&local->chanctx_mtx); 1741 ieee80211_link_unreserve_chanctx(link); 1742 mutex_unlock(&local->chanctx_mtx); 1743 1744 if (link->csa_block_tx) 1745 ieee80211_wake_vif_queues(local, sdata, 1746 IEEE80211_QUEUE_STOP_REASON_CSA); 1747 1748 link->csa_block_tx = false; 1749 link->conf->csa_active = false; 1750 1751 mutex_unlock(&local->mtx); 1752 1753 drv_abort_channel_switch(sdata); 1754 } 1755 1756 static void 1757 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1758 u64 timestamp, u32 device_timestamp, 1759 struct ieee802_11_elems *elems, 1760 bool beacon) 1761 { 1762 struct ieee80211_sub_if_data *sdata = link->sdata; 1763 struct ieee80211_local *local = sdata->local; 1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1765 struct cfg80211_bss *cbss = link->u.mgd.bss; 1766 struct ieee80211_chanctx_conf *conf; 1767 struct ieee80211_chanctx *chanctx; 1768 enum nl80211_band current_band; 1769 struct ieee80211_csa_ie csa_ie; 1770 struct ieee80211_channel_switch ch_switch; 1771 struct ieee80211_bss *bss; 1772 int res; 1773 1774 sdata_assert_lock(sdata); 1775 1776 if (!cbss) 1777 return; 1778 1779 if (local->scanning) 1780 return; 1781 1782 current_band = cbss->channel->band; 1783 bss = (void *)cbss->priv; 1784 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1785 bss->vht_cap_info, 1786 link->u.mgd.conn_flags, 1787 link->u.mgd.bssid, &csa_ie); 1788 1789 if (!res) { 1790 ch_switch.timestamp = timestamp; 1791 ch_switch.device_timestamp = device_timestamp; 1792 ch_switch.block_tx = csa_ie.mode; 1793 ch_switch.chandef = csa_ie.chandef; 1794 ch_switch.count = csa_ie.count; 1795 ch_switch.delay = csa_ie.max_switch_time; 1796 } 1797 1798 if (res < 0) 1799 goto lock_and_drop_connection; 1800 1801 if (beacon && link->conf->csa_active && 1802 !link->u.mgd.csa_waiting_bcn) { 1803 if (res) 1804 ieee80211_sta_abort_chanswitch(link); 1805 else 1806 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1807 return; 1808 } else if (link->conf->csa_active || res) { 1809 /* disregard subsequent announcements if already processing */ 1810 return; 1811 } 1812 1813 if (link->conf->chandef.chan->band != 1814 csa_ie.chandef.chan->band) { 1815 sdata_info(sdata, 1816 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1817 link->u.mgd.bssid, 1818 csa_ie.chandef.chan->center_freq, 1819 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1820 csa_ie.chandef.center_freq2); 1821 goto lock_and_drop_connection; 1822 } 1823 1824 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1825 IEEE80211_CHAN_DISABLED)) { 1826 sdata_info(sdata, 1827 "AP %pM switches to unsupported channel " 1828 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1829 "disconnecting\n", 1830 link->u.mgd.bssid, 1831 csa_ie.chandef.chan->center_freq, 1832 csa_ie.chandef.chan->freq_offset, 1833 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1834 csa_ie.chandef.freq1_offset, 1835 csa_ie.chandef.center_freq2); 1836 goto lock_and_drop_connection; 1837 } 1838 1839 if (cfg80211_chandef_identical(&csa_ie.chandef, 1840 &link->conf->chandef) && 1841 (!csa_ie.mode || !beacon)) { 1842 if (link->u.mgd.csa_ignored_same_chan) 1843 return; 1844 sdata_info(sdata, 1845 "AP %pM tries to chanswitch to same channel, ignore\n", 1846 link->u.mgd.bssid); 1847 link->u.mgd.csa_ignored_same_chan = true; 1848 return; 1849 } 1850 1851 /* 1852 * Drop all TDLS peers - either we disconnect or move to a different 1853 * channel from this point on. There's no telling what our peer will do. 1854 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1855 * have an incompatible wider chandef. 1856 */ 1857 ieee80211_teardown_tdls_peers(sdata); 1858 1859 mutex_lock(&local->mtx); 1860 mutex_lock(&local->chanctx_mtx); 1861 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1862 lockdep_is_held(&local->chanctx_mtx)); 1863 if (!conf) { 1864 sdata_info(sdata, 1865 "no channel context assigned to vif?, disconnecting\n"); 1866 goto drop_connection; 1867 } 1868 1869 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1870 1871 if (local->use_chanctx && 1872 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1873 sdata_info(sdata, 1874 "driver doesn't support chan-switch with channel contexts\n"); 1875 goto drop_connection; 1876 } 1877 1878 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1879 sdata_info(sdata, 1880 "preparing for channel switch failed, disconnecting\n"); 1881 goto drop_connection; 1882 } 1883 1884 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1885 chanctx->mode, false); 1886 if (res) { 1887 sdata_info(sdata, 1888 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1889 res); 1890 goto drop_connection; 1891 } 1892 mutex_unlock(&local->chanctx_mtx); 1893 1894 link->conf->csa_active = true; 1895 link->csa_chandef = csa_ie.chandef; 1896 link->csa_block_tx = csa_ie.mode; 1897 link->u.mgd.csa_ignored_same_chan = false; 1898 link->u.mgd.beacon_crc_valid = false; 1899 1900 if (link->csa_block_tx) 1901 ieee80211_stop_vif_queues(local, sdata, 1902 IEEE80211_QUEUE_STOP_REASON_CSA); 1903 mutex_unlock(&local->mtx); 1904 1905 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1906 csa_ie.count, csa_ie.mode); 1907 1908 if (local->ops->channel_switch) { 1909 /* use driver's channel switch callback */ 1910 drv_channel_switch(local, sdata, &ch_switch); 1911 return; 1912 } 1913 1914 /* channel switch handled in software */ 1915 if (csa_ie.count <= 1) 1916 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 1917 else 1918 mod_timer(&link->u.mgd.chswitch_timer, 1919 TU_TO_EXP_TIME((csa_ie.count - 1) * 1920 cbss->beacon_interval)); 1921 return; 1922 lock_and_drop_connection: 1923 mutex_lock(&local->mtx); 1924 mutex_lock(&local->chanctx_mtx); 1925 drop_connection: 1926 /* 1927 * This is just so that the disconnect flow will know that 1928 * we were trying to switch channel and failed. In case the 1929 * mode is 1 (we are not allowed to Tx), we will know not to 1930 * send a deauthentication frame. Those two fields will be 1931 * reset when the disconnection worker runs. 1932 */ 1933 link->conf->csa_active = true; 1934 link->csa_block_tx = csa_ie.mode; 1935 1936 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1937 mutex_unlock(&local->chanctx_mtx); 1938 mutex_unlock(&local->mtx); 1939 } 1940 1941 static bool 1942 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1943 struct ieee80211_channel *channel, 1944 const u8 *country_ie, u8 country_ie_len, 1945 const u8 *pwr_constr_elem, 1946 int *chan_pwr, int *pwr_reduction) 1947 { 1948 struct ieee80211_country_ie_triplet *triplet; 1949 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1950 int i, chan_increment; 1951 bool have_chan_pwr = false; 1952 1953 /* Invalid IE */ 1954 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1955 return false; 1956 1957 triplet = (void *)(country_ie + 3); 1958 country_ie_len -= 3; 1959 1960 switch (channel->band) { 1961 default: 1962 WARN_ON_ONCE(1); 1963 fallthrough; 1964 case NL80211_BAND_2GHZ: 1965 case NL80211_BAND_60GHZ: 1966 case NL80211_BAND_LC: 1967 chan_increment = 1; 1968 break; 1969 case NL80211_BAND_5GHZ: 1970 chan_increment = 4; 1971 break; 1972 case NL80211_BAND_6GHZ: 1973 /* 1974 * In the 6 GHz band, the "maximum transmit power level" 1975 * field in the triplets is reserved, and thus will be 1976 * zero and we shouldn't use it to control TX power. 1977 * The actual TX power will be given in the transmit 1978 * power envelope element instead. 1979 */ 1980 return false; 1981 } 1982 1983 /* find channel */ 1984 while (country_ie_len >= 3) { 1985 u8 first_channel = triplet->chans.first_channel; 1986 1987 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1988 goto next; 1989 1990 for (i = 0; i < triplet->chans.num_channels; i++) { 1991 if (first_channel + i * chan_increment == chan) { 1992 have_chan_pwr = true; 1993 *chan_pwr = triplet->chans.max_power; 1994 break; 1995 } 1996 } 1997 if (have_chan_pwr) 1998 break; 1999 2000 next: 2001 triplet++; 2002 country_ie_len -= 3; 2003 } 2004 2005 if (have_chan_pwr && pwr_constr_elem) 2006 *pwr_reduction = *pwr_constr_elem; 2007 else 2008 *pwr_reduction = 0; 2009 2010 return have_chan_pwr; 2011 } 2012 2013 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2014 struct ieee80211_channel *channel, 2015 const u8 *cisco_dtpc_ie, 2016 int *pwr_level) 2017 { 2018 /* From practical testing, the first data byte of the DTPC element 2019 * seems to contain the requested dBm level, and the CLI on Cisco 2020 * APs clearly state the range is -127 to 127 dBm, which indicates 2021 * a signed byte, although it seemingly never actually goes negative. 2022 * The other byte seems to always be zero. 2023 */ 2024 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2025 } 2026 2027 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2028 struct ieee80211_channel *channel, 2029 struct ieee80211_mgmt *mgmt, 2030 const u8 *country_ie, u8 country_ie_len, 2031 const u8 *pwr_constr_ie, 2032 const u8 *cisco_dtpc_ie) 2033 { 2034 struct ieee80211_sub_if_data *sdata = link->sdata; 2035 bool has_80211h_pwr = false, has_cisco_pwr = false; 2036 int chan_pwr = 0, pwr_reduction_80211h = 0; 2037 int pwr_level_cisco, pwr_level_80211h; 2038 int new_ap_level; 2039 __le16 capab = mgmt->u.probe_resp.capab_info; 2040 2041 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2042 return 0; /* TODO */ 2043 2044 if (country_ie && 2045 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2046 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2047 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2048 sdata, channel, country_ie, country_ie_len, 2049 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2050 pwr_level_80211h = 2051 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2052 } 2053 2054 if (cisco_dtpc_ie) { 2055 ieee80211_find_cisco_dtpc( 2056 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2057 has_cisco_pwr = true; 2058 } 2059 2060 if (!has_80211h_pwr && !has_cisco_pwr) 2061 return 0; 2062 2063 /* If we have both 802.11h and Cisco DTPC, apply both limits 2064 * by picking the smallest of the two power levels advertised. 2065 */ 2066 if (has_80211h_pwr && 2067 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2068 new_ap_level = pwr_level_80211h; 2069 2070 if (link->ap_power_level == new_ap_level) 2071 return 0; 2072 2073 sdata_dbg(sdata, 2074 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2075 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2076 link->u.mgd.bssid); 2077 } else { /* has_cisco_pwr is always true here. */ 2078 new_ap_level = pwr_level_cisco; 2079 2080 if (link->ap_power_level == new_ap_level) 2081 return 0; 2082 2083 sdata_dbg(sdata, 2084 "Limiting TX power to %d dBm as advertised by %pM\n", 2085 pwr_level_cisco, link->u.mgd.bssid); 2086 } 2087 2088 link->ap_power_level = new_ap_level; 2089 if (__ieee80211_recalc_txpower(sdata)) 2090 return BSS_CHANGED_TXPOWER; 2091 return 0; 2092 } 2093 2094 /* powersave */ 2095 static void ieee80211_enable_ps(struct ieee80211_local *local, 2096 struct ieee80211_sub_if_data *sdata) 2097 { 2098 struct ieee80211_conf *conf = &local->hw.conf; 2099 2100 /* 2101 * If we are scanning right now then the parameters will 2102 * take effect when scan finishes. 2103 */ 2104 if (local->scanning) 2105 return; 2106 2107 if (conf->dynamic_ps_timeout > 0 && 2108 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2109 mod_timer(&local->dynamic_ps_timer, jiffies + 2110 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2111 } else { 2112 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2113 ieee80211_send_nullfunc(local, sdata, true); 2114 2115 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2116 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2117 return; 2118 2119 conf->flags |= IEEE80211_CONF_PS; 2120 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2121 } 2122 } 2123 2124 static void ieee80211_change_ps(struct ieee80211_local *local) 2125 { 2126 struct ieee80211_conf *conf = &local->hw.conf; 2127 2128 if (local->ps_sdata) { 2129 ieee80211_enable_ps(local, local->ps_sdata); 2130 } else if (conf->flags & IEEE80211_CONF_PS) { 2131 conf->flags &= ~IEEE80211_CONF_PS; 2132 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2133 del_timer_sync(&local->dynamic_ps_timer); 2134 cancel_work_sync(&local->dynamic_ps_enable_work); 2135 } 2136 } 2137 2138 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2139 { 2140 struct ieee80211_local *local = sdata->local; 2141 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2142 struct sta_info *sta = NULL; 2143 bool authorized = false; 2144 2145 if (!mgd->powersave) 2146 return false; 2147 2148 if (mgd->broken_ap) 2149 return false; 2150 2151 if (!mgd->associated) 2152 return false; 2153 2154 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2155 return false; 2156 2157 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2158 !sdata->deflink.u.mgd.have_beacon) 2159 return false; 2160 2161 rcu_read_lock(); 2162 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2163 if (sta) 2164 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2165 rcu_read_unlock(); 2166 2167 return authorized; 2168 } 2169 2170 /* need to hold RTNL or interface lock */ 2171 void ieee80211_recalc_ps(struct ieee80211_local *local) 2172 { 2173 struct ieee80211_sub_if_data *sdata, *found = NULL; 2174 int count = 0; 2175 int timeout; 2176 2177 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2178 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2179 local->ps_sdata = NULL; 2180 return; 2181 } 2182 2183 list_for_each_entry(sdata, &local->interfaces, list) { 2184 if (!ieee80211_sdata_running(sdata)) 2185 continue; 2186 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2187 /* If an AP vif is found, then disable PS 2188 * by setting the count to zero thereby setting 2189 * ps_sdata to NULL. 2190 */ 2191 count = 0; 2192 break; 2193 } 2194 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2195 continue; 2196 found = sdata; 2197 count++; 2198 } 2199 2200 if (count == 1 && ieee80211_powersave_allowed(found)) { 2201 u8 dtimper = found->deflink.u.mgd.dtim_period; 2202 2203 timeout = local->dynamic_ps_forced_timeout; 2204 if (timeout < 0) 2205 timeout = 100; 2206 local->hw.conf.dynamic_ps_timeout = timeout; 2207 2208 /* If the TIM IE is invalid, pretend the value is 1 */ 2209 if (!dtimper) 2210 dtimper = 1; 2211 2212 local->hw.conf.ps_dtim_period = dtimper; 2213 local->ps_sdata = found; 2214 } else { 2215 local->ps_sdata = NULL; 2216 } 2217 2218 ieee80211_change_ps(local); 2219 } 2220 2221 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2222 { 2223 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2224 2225 if (sdata->vif.cfg.ps != ps_allowed) { 2226 sdata->vif.cfg.ps = ps_allowed; 2227 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2228 } 2229 } 2230 2231 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2232 { 2233 struct ieee80211_local *local = 2234 container_of(work, struct ieee80211_local, 2235 dynamic_ps_disable_work); 2236 2237 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2238 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2239 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2240 } 2241 2242 ieee80211_wake_queues_by_reason(&local->hw, 2243 IEEE80211_MAX_QUEUE_MAP, 2244 IEEE80211_QUEUE_STOP_REASON_PS, 2245 false); 2246 } 2247 2248 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2249 { 2250 struct ieee80211_local *local = 2251 container_of(work, struct ieee80211_local, 2252 dynamic_ps_enable_work); 2253 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2254 struct ieee80211_if_managed *ifmgd; 2255 unsigned long flags; 2256 int q; 2257 2258 /* can only happen when PS was just disabled anyway */ 2259 if (!sdata) 2260 return; 2261 2262 ifmgd = &sdata->u.mgd; 2263 2264 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2265 return; 2266 2267 if (local->hw.conf.dynamic_ps_timeout > 0) { 2268 /* don't enter PS if TX frames are pending */ 2269 if (drv_tx_frames_pending(local)) { 2270 mod_timer(&local->dynamic_ps_timer, jiffies + 2271 msecs_to_jiffies( 2272 local->hw.conf.dynamic_ps_timeout)); 2273 return; 2274 } 2275 2276 /* 2277 * transmission can be stopped by others which leads to 2278 * dynamic_ps_timer expiry. Postpone the ps timer if it 2279 * is not the actual idle state. 2280 */ 2281 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2282 for (q = 0; q < local->hw.queues; q++) { 2283 if (local->queue_stop_reasons[q]) { 2284 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2285 flags); 2286 mod_timer(&local->dynamic_ps_timer, jiffies + 2287 msecs_to_jiffies( 2288 local->hw.conf.dynamic_ps_timeout)); 2289 return; 2290 } 2291 } 2292 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2293 } 2294 2295 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2296 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2297 if (drv_tx_frames_pending(local)) { 2298 mod_timer(&local->dynamic_ps_timer, jiffies + 2299 msecs_to_jiffies( 2300 local->hw.conf.dynamic_ps_timeout)); 2301 } else { 2302 ieee80211_send_nullfunc(local, sdata, true); 2303 /* Flush to get the tx status of nullfunc frame */ 2304 ieee80211_flush_queues(local, sdata, false); 2305 } 2306 } 2307 2308 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2309 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2310 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2311 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2312 local->hw.conf.flags |= IEEE80211_CONF_PS; 2313 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2314 } 2315 } 2316 2317 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2318 { 2319 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2320 2321 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2322 } 2323 2324 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2325 { 2326 struct delayed_work *delayed_work = to_delayed_work(work); 2327 struct ieee80211_link_data *link = 2328 container_of(delayed_work, struct ieee80211_link_data, 2329 dfs_cac_timer_work); 2330 struct cfg80211_chan_def chandef = link->conf->chandef; 2331 struct ieee80211_sub_if_data *sdata = link->sdata; 2332 2333 mutex_lock(&sdata->local->mtx); 2334 if (sdata->wdev.cac_started) { 2335 ieee80211_link_release_channel(link); 2336 cfg80211_cac_event(sdata->dev, &chandef, 2337 NL80211_RADAR_CAC_FINISHED, 2338 GFP_KERNEL); 2339 } 2340 mutex_unlock(&sdata->local->mtx); 2341 } 2342 2343 static bool 2344 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2345 { 2346 struct ieee80211_local *local = sdata->local; 2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2348 bool ret = false; 2349 int ac; 2350 2351 if (local->hw.queues < IEEE80211_NUM_ACS) 2352 return false; 2353 2354 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2355 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2356 int non_acm_ac; 2357 unsigned long now = jiffies; 2358 2359 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2360 tx_tspec->admitted_time && 2361 time_after(now, tx_tspec->time_slice_start + HZ)) { 2362 tx_tspec->consumed_tx_time = 0; 2363 tx_tspec->time_slice_start = now; 2364 2365 if (tx_tspec->downgraded) 2366 tx_tspec->action = 2367 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2368 } 2369 2370 switch (tx_tspec->action) { 2371 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2372 /* take the original parameters */ 2373 if (drv_conf_tx(local, &sdata->deflink, ac, 2374 &sdata->deflink.tx_conf[ac])) 2375 link_err(&sdata->deflink, 2376 "failed to set TX queue parameters for queue %d\n", 2377 ac); 2378 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2379 tx_tspec->downgraded = false; 2380 ret = true; 2381 break; 2382 case TX_TSPEC_ACTION_DOWNGRADE: 2383 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2384 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2385 ret = true; 2386 break; 2387 } 2388 /* downgrade next lower non-ACM AC */ 2389 for (non_acm_ac = ac + 1; 2390 non_acm_ac < IEEE80211_NUM_ACS; 2391 non_acm_ac++) 2392 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2393 break; 2394 /* Usually the loop will result in using BK even if it 2395 * requires admission control, but such a configuration 2396 * makes no sense and we have to transmit somehow - the 2397 * AC selection does the same thing. 2398 * If we started out trying to downgrade from BK, then 2399 * the extra condition here might be needed. 2400 */ 2401 if (non_acm_ac >= IEEE80211_NUM_ACS) 2402 non_acm_ac = IEEE80211_AC_BK; 2403 if (drv_conf_tx(local, &sdata->deflink, ac, 2404 &sdata->deflink.tx_conf[non_acm_ac])) 2405 link_err(&sdata->deflink, 2406 "failed to set TX queue parameters for queue %d\n", 2407 ac); 2408 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2409 ret = true; 2410 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2411 tx_tspec->time_slice_start + HZ - now + 1); 2412 break; 2413 case TX_TSPEC_ACTION_NONE: 2414 /* nothing now */ 2415 break; 2416 } 2417 } 2418 2419 return ret; 2420 } 2421 2422 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2423 { 2424 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2425 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2426 BSS_CHANGED_QOS); 2427 } 2428 2429 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2430 { 2431 struct ieee80211_sub_if_data *sdata; 2432 2433 sdata = container_of(work, struct ieee80211_sub_if_data, 2434 u.mgd.tx_tspec_wk.work); 2435 ieee80211_sta_handle_tspec_ac_params(sdata); 2436 } 2437 2438 /* MLME */ 2439 static bool 2440 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2441 struct ieee80211_link_data *link, 2442 const u8 *wmm_param, size_t wmm_param_len, 2443 const struct ieee80211_mu_edca_param_set *mu_edca) 2444 { 2445 struct ieee80211_sub_if_data *sdata = link->sdata; 2446 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2447 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2448 size_t left; 2449 int count, mu_edca_count, ac; 2450 const u8 *pos; 2451 u8 uapsd_queues = 0; 2452 2453 if (!local->ops->conf_tx) 2454 return false; 2455 2456 if (local->hw.queues < IEEE80211_NUM_ACS) 2457 return false; 2458 2459 if (!wmm_param) 2460 return false; 2461 2462 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2463 return false; 2464 2465 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2466 uapsd_queues = ifmgd->uapsd_queues; 2467 2468 count = wmm_param[6] & 0x0f; 2469 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2470 * if mu_edca was preset before and now it disappeared tell 2471 * the driver about it. 2472 */ 2473 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2474 if (count == link->u.mgd.wmm_last_param_set && 2475 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2476 return false; 2477 link->u.mgd.wmm_last_param_set = count; 2478 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2479 2480 pos = wmm_param + 8; 2481 left = wmm_param_len - 8; 2482 2483 memset(¶ms, 0, sizeof(params)); 2484 2485 sdata->wmm_acm = 0; 2486 for (; left >= 4; left -= 4, pos += 4) { 2487 int aci = (pos[0] >> 5) & 0x03; 2488 int acm = (pos[0] >> 4) & 0x01; 2489 bool uapsd = false; 2490 2491 switch (aci) { 2492 case 1: /* AC_BK */ 2493 ac = IEEE80211_AC_BK; 2494 if (acm) 2495 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2496 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2497 uapsd = true; 2498 params[ac].mu_edca = !!mu_edca; 2499 if (mu_edca) 2500 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2501 break; 2502 case 2: /* AC_VI */ 2503 ac = IEEE80211_AC_VI; 2504 if (acm) 2505 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2506 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2507 uapsd = true; 2508 params[ac].mu_edca = !!mu_edca; 2509 if (mu_edca) 2510 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2511 break; 2512 case 3: /* AC_VO */ 2513 ac = IEEE80211_AC_VO; 2514 if (acm) 2515 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2516 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2517 uapsd = true; 2518 params[ac].mu_edca = !!mu_edca; 2519 if (mu_edca) 2520 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2521 break; 2522 case 0: /* AC_BE */ 2523 default: 2524 ac = IEEE80211_AC_BE; 2525 if (acm) 2526 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2527 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2528 uapsd = true; 2529 params[ac].mu_edca = !!mu_edca; 2530 if (mu_edca) 2531 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2532 break; 2533 } 2534 2535 params[ac].aifs = pos[0] & 0x0f; 2536 2537 if (params[ac].aifs < 2) { 2538 sdata_info(sdata, 2539 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2540 params[ac].aifs, aci); 2541 params[ac].aifs = 2; 2542 } 2543 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2544 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2545 params[ac].txop = get_unaligned_le16(pos + 2); 2546 params[ac].acm = acm; 2547 params[ac].uapsd = uapsd; 2548 2549 if (params[ac].cw_min == 0 || 2550 params[ac].cw_min > params[ac].cw_max) { 2551 sdata_info(sdata, 2552 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2553 params[ac].cw_min, params[ac].cw_max, aci); 2554 return false; 2555 } 2556 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2557 } 2558 2559 /* WMM specification requires all 4 ACIs. */ 2560 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2561 if (params[ac].cw_min == 0) { 2562 sdata_info(sdata, 2563 "AP has invalid WMM params (missing AC %d), using defaults\n", 2564 ac); 2565 return false; 2566 } 2567 } 2568 2569 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2570 mlme_dbg(sdata, 2571 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2572 ac, params[ac].acm, 2573 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2574 params[ac].txop, params[ac].uapsd, 2575 ifmgd->tx_tspec[ac].downgraded); 2576 link->tx_conf[ac] = params[ac]; 2577 if (!ifmgd->tx_tspec[ac].downgraded && 2578 drv_conf_tx(local, link, ac, ¶ms[ac])) 2579 link_err(link, 2580 "failed to set TX queue parameters for AC %d\n", 2581 ac); 2582 } 2583 2584 /* enable WMM or activate new settings */ 2585 link->conf->qos = true; 2586 return true; 2587 } 2588 2589 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2590 { 2591 lockdep_assert_held(&sdata->local->mtx); 2592 2593 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2594 ieee80211_run_deferred_scan(sdata->local); 2595 } 2596 2597 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2598 { 2599 mutex_lock(&sdata->local->mtx); 2600 __ieee80211_stop_poll(sdata); 2601 mutex_unlock(&sdata->local->mtx); 2602 } 2603 2604 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2605 u16 capab, bool erp_valid, u8 erp) 2606 { 2607 struct ieee80211_bss_conf *bss_conf = link->conf; 2608 struct ieee80211_supported_band *sband; 2609 u32 changed = 0; 2610 bool use_protection; 2611 bool use_short_preamble; 2612 bool use_short_slot; 2613 2614 sband = ieee80211_get_link_sband(link); 2615 if (!sband) 2616 return changed; 2617 2618 if (erp_valid) { 2619 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2620 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2621 } else { 2622 use_protection = false; 2623 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2624 } 2625 2626 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2627 if (sband->band == NL80211_BAND_5GHZ || 2628 sband->band == NL80211_BAND_6GHZ) 2629 use_short_slot = true; 2630 2631 if (use_protection != bss_conf->use_cts_prot) { 2632 bss_conf->use_cts_prot = use_protection; 2633 changed |= BSS_CHANGED_ERP_CTS_PROT; 2634 } 2635 2636 if (use_short_preamble != bss_conf->use_short_preamble) { 2637 bss_conf->use_short_preamble = use_short_preamble; 2638 changed |= BSS_CHANGED_ERP_PREAMBLE; 2639 } 2640 2641 if (use_short_slot != bss_conf->use_short_slot) { 2642 bss_conf->use_short_slot = use_short_slot; 2643 changed |= BSS_CHANGED_ERP_SLOT; 2644 } 2645 2646 return changed; 2647 } 2648 2649 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2650 struct cfg80211_bss *cbss) 2651 { 2652 struct ieee80211_sub_if_data *sdata = link->sdata; 2653 struct ieee80211_bss_conf *bss_conf = link->conf; 2654 struct ieee80211_bss *bss = (void *)cbss->priv; 2655 u32 changed = BSS_CHANGED_QOS; 2656 2657 /* not really used in MLO */ 2658 sdata->u.mgd.beacon_timeout = 2659 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2660 bss_conf->beacon_int)); 2661 2662 changed |= ieee80211_handle_bss_capability(link, 2663 bss_conf->assoc_capability, 2664 bss->has_erp_value, 2665 bss->erp_value); 2666 2667 ieee80211_check_rate_mask(link); 2668 2669 link->u.mgd.bss = cbss; 2670 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2671 2672 if (sdata->vif.p2p || 2673 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2674 const struct cfg80211_bss_ies *ies; 2675 2676 rcu_read_lock(); 2677 ies = rcu_dereference(cbss->ies); 2678 if (ies) { 2679 int ret; 2680 2681 ret = cfg80211_get_p2p_attr( 2682 ies->data, ies->len, 2683 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2684 (u8 *) &bss_conf->p2p_noa_attr, 2685 sizeof(bss_conf->p2p_noa_attr)); 2686 if (ret >= 2) { 2687 link->u.mgd.p2p_noa_index = 2688 bss_conf->p2p_noa_attr.index; 2689 changed |= BSS_CHANGED_P2P_PS; 2690 } 2691 } 2692 rcu_read_unlock(); 2693 } 2694 2695 if (link->u.mgd.have_beacon) { 2696 /* 2697 * If the AP is buggy we may get here with no DTIM period 2698 * known, so assume it's 1 which is the only safe assumption 2699 * in that case, although if the TIM IE is broken powersave 2700 * probably just won't work at all. 2701 */ 2702 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1; 2703 bss_conf->beacon_rate = bss->beacon_rate; 2704 changed |= BSS_CHANGED_BEACON_INFO; 2705 } else { 2706 bss_conf->beacon_rate = NULL; 2707 bss_conf->dtim_period = 0; 2708 } 2709 2710 /* Tell the driver to monitor connection quality (if supported) */ 2711 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2712 bss_conf->cqm_rssi_thold) 2713 changed |= BSS_CHANGED_CQM; 2714 2715 return changed; 2716 } 2717 2718 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2719 struct ieee80211_mgd_assoc_data *assoc_data, 2720 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2721 { 2722 struct ieee80211_local *local = sdata->local; 2723 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2724 u64 vif_changed = BSS_CHANGED_ASSOC; 2725 unsigned int link_id; 2726 2727 sdata->u.mgd.associated = true; 2728 2729 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2730 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2731 struct ieee80211_link_data *link; 2732 2733 if (!cbss) 2734 continue; 2735 2736 link = sdata_dereference(sdata->link[link_id], sdata); 2737 if (WARN_ON(!link)) 2738 return; 2739 2740 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2741 } 2742 2743 /* just to be sure */ 2744 ieee80211_stop_poll(sdata); 2745 2746 ieee80211_led_assoc(local, 1); 2747 2748 vif_cfg->assoc = 1; 2749 2750 /* Enable ARP filtering */ 2751 if (vif_cfg->arp_addr_cnt) 2752 vif_changed |= BSS_CHANGED_ARP_FILTER; 2753 2754 if (sdata->vif.valid_links) { 2755 for (link_id = 0; 2756 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2757 link_id++) { 2758 struct ieee80211_link_data *link; 2759 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2760 2761 if (!cbss) 2762 continue; 2763 2764 link = sdata_dereference(sdata->link[link_id], sdata); 2765 if (WARN_ON(!link)) 2766 return; 2767 2768 ieee80211_link_info_change_notify(sdata, link, 2769 changed[link_id]); 2770 2771 ieee80211_recalc_smps(sdata, link); 2772 } 2773 2774 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2775 } else { 2776 ieee80211_bss_info_change_notify(sdata, 2777 vif_changed | changed[0]); 2778 } 2779 2780 mutex_lock(&local->iflist_mtx); 2781 ieee80211_recalc_ps(local); 2782 mutex_unlock(&local->iflist_mtx); 2783 2784 /* leave this here to not change ordering in non-MLO cases */ 2785 if (!sdata->vif.valid_links) 2786 ieee80211_recalc_smps(sdata, &sdata->deflink); 2787 ieee80211_recalc_ps_vif(sdata); 2788 2789 netif_carrier_on(sdata->dev); 2790 } 2791 2792 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2793 u16 stype, u16 reason, bool tx, 2794 u8 *frame_buf) 2795 { 2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2797 struct ieee80211_local *local = sdata->local; 2798 unsigned int link_id; 2799 u32 changed = 0; 2800 struct ieee80211_prep_tx_info info = { 2801 .subtype = stype, 2802 }; 2803 2804 sdata_assert_lock(sdata); 2805 2806 if (WARN_ON_ONCE(tx && !frame_buf)) 2807 return; 2808 2809 if (WARN_ON(!ifmgd->associated)) 2810 return; 2811 2812 ieee80211_stop_poll(sdata); 2813 2814 ifmgd->associated = false; 2815 2816 /* other links will be destroyed */ 2817 sdata->deflink.u.mgd.bss = NULL; 2818 2819 netif_carrier_off(sdata->dev); 2820 2821 /* 2822 * if we want to get out of ps before disassoc (why?) we have 2823 * to do it before sending disassoc, as otherwise the null-packet 2824 * won't be valid. 2825 */ 2826 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2827 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2828 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2829 } 2830 local->ps_sdata = NULL; 2831 2832 /* disable per-vif ps */ 2833 ieee80211_recalc_ps_vif(sdata); 2834 2835 /* make sure ongoing transmission finishes */ 2836 synchronize_net(); 2837 2838 /* 2839 * drop any frame before deauth/disassoc, this can be data or 2840 * management frame. Since we are disconnecting, we should not 2841 * insist sending these frames which can take time and delay 2842 * the disconnection and possible the roaming. 2843 */ 2844 if (tx) 2845 ieee80211_flush_queues(local, sdata, true); 2846 2847 /* deauthenticate/disassociate now */ 2848 if (tx || frame_buf) { 2849 /* 2850 * In multi channel scenarios guarantee that the virtual 2851 * interface is granted immediate airtime to transmit the 2852 * deauthentication frame by calling mgd_prepare_tx, if the 2853 * driver requested so. 2854 */ 2855 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2856 !sdata->deflink.u.mgd.have_beacon) { 2857 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2858 } 2859 2860 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2861 sdata->vif.cfg.ap_addr, stype, 2862 reason, tx, frame_buf); 2863 } 2864 2865 /* flush out frame - make sure the deauth was actually sent */ 2866 if (tx) 2867 ieee80211_flush_queues(local, sdata, false); 2868 2869 drv_mgd_complete_tx(sdata->local, sdata, &info); 2870 2871 /* clear AP addr only after building the needed mgmt frames */ 2872 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2873 eth_zero_addr(sdata->vif.cfg.ap_addr); 2874 2875 sdata->vif.cfg.ssid_len = 0; 2876 2877 /* remove AP and TDLS peers */ 2878 sta_info_flush(sdata); 2879 2880 /* finally reset all BSS / config parameters */ 2881 if (!sdata->vif.valid_links) 2882 changed |= ieee80211_reset_erp_info(sdata); 2883 2884 ieee80211_led_assoc(local, 0); 2885 changed |= BSS_CHANGED_ASSOC; 2886 sdata->vif.cfg.assoc = false; 2887 2888 sdata->deflink.u.mgd.p2p_noa_index = -1; 2889 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2890 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2891 2892 /* on the next assoc, re-program HT/VHT parameters */ 2893 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2894 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2895 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2896 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2897 2898 /* 2899 * reset MU-MIMO ownership and group data in default link, 2900 * if used, other links are destroyed 2901 */ 2902 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2903 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2904 memset(sdata->vif.bss_conf.mu_group.position, 0, 2905 sizeof(sdata->vif.bss_conf.mu_group.position)); 2906 if (!sdata->vif.valid_links) 2907 changed |= BSS_CHANGED_MU_GROUPS; 2908 sdata->vif.bss_conf.mu_mimo_owner = false; 2909 2910 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2911 2912 del_timer_sync(&local->dynamic_ps_timer); 2913 cancel_work_sync(&local->dynamic_ps_enable_work); 2914 2915 /* Disable ARP filtering */ 2916 if (sdata->vif.cfg.arp_addr_cnt) 2917 changed |= BSS_CHANGED_ARP_FILTER; 2918 2919 sdata->vif.bss_conf.qos = false; 2920 if (!sdata->vif.valid_links) { 2921 changed |= BSS_CHANGED_QOS; 2922 /* The BSSID (not really interesting) and HT changed */ 2923 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2924 ieee80211_bss_info_change_notify(sdata, changed); 2925 } else { 2926 ieee80211_vif_cfg_change_notify(sdata, changed); 2927 } 2928 2929 /* disassociated - set to defaults now */ 2930 ieee80211_set_wmm_default(&sdata->deflink, false, false); 2931 2932 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2933 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2934 del_timer_sync(&sdata->u.mgd.timer); 2935 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 2936 2937 sdata->vif.bss_conf.dtim_period = 0; 2938 sdata->vif.bss_conf.beacon_rate = NULL; 2939 2940 sdata->deflink.u.mgd.have_beacon = false; 2941 sdata->deflink.u.mgd.tracking_signal_avg = false; 2942 sdata->deflink.u.mgd.disable_wmm_tracking = false; 2943 2944 ifmgd->flags = 0; 2945 sdata->deflink.u.mgd.conn_flags = 0; 2946 mutex_lock(&local->mtx); 2947 2948 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 2949 struct ieee80211_link_data *link; 2950 2951 link = sdata_dereference(sdata->link[link_id], sdata); 2952 if (!link) 2953 continue; 2954 ieee80211_link_release_channel(link); 2955 } 2956 2957 sdata->vif.bss_conf.csa_active = false; 2958 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2959 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 2960 if (sdata->deflink.csa_block_tx) { 2961 ieee80211_wake_vif_queues(local, sdata, 2962 IEEE80211_QUEUE_STOP_REASON_CSA); 2963 sdata->deflink.csa_block_tx = false; 2964 } 2965 mutex_unlock(&local->mtx); 2966 2967 /* existing TX TSPEC sessions no longer exist */ 2968 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2969 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2970 2971 sdata->vif.bss_conf.pwr_reduction = 0; 2972 sdata->vif.bss_conf.tx_pwr_env_num = 0; 2973 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 2974 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 2975 2976 ieee80211_vif_set_links(sdata, 0); 2977 } 2978 2979 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2980 { 2981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2982 struct ieee80211_local *local = sdata->local; 2983 2984 mutex_lock(&local->mtx); 2985 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2986 goto out; 2987 2988 __ieee80211_stop_poll(sdata); 2989 2990 mutex_lock(&local->iflist_mtx); 2991 ieee80211_recalc_ps(local); 2992 mutex_unlock(&local->iflist_mtx); 2993 2994 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2995 goto out; 2996 2997 /* 2998 * We've received a probe response, but are not sure whether 2999 * we have or will be receiving any beacons or data, so let's 3000 * schedule the timers again, just in case. 3001 */ 3002 ieee80211_sta_reset_beacon_monitor(sdata); 3003 3004 mod_timer(&ifmgd->conn_mon_timer, 3005 round_jiffies_up(jiffies + 3006 IEEE80211_CONNECTION_IDLE_TIME)); 3007 out: 3008 mutex_unlock(&local->mtx); 3009 } 3010 3011 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3012 struct ieee80211_hdr *hdr, 3013 u16 tx_time) 3014 { 3015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3016 u16 tid; 3017 int ac; 3018 struct ieee80211_sta_tx_tspec *tx_tspec; 3019 unsigned long now = jiffies; 3020 3021 if (!ieee80211_is_data_qos(hdr->frame_control)) 3022 return; 3023 3024 tid = ieee80211_get_tid(hdr); 3025 ac = ieee80211_ac_from_tid(tid); 3026 tx_tspec = &ifmgd->tx_tspec[ac]; 3027 3028 if (likely(!tx_tspec->admitted_time)) 3029 return; 3030 3031 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3032 tx_tspec->consumed_tx_time = 0; 3033 tx_tspec->time_slice_start = now; 3034 3035 if (tx_tspec->downgraded) { 3036 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3037 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3038 } 3039 } 3040 3041 if (tx_tspec->downgraded) 3042 return; 3043 3044 tx_tspec->consumed_tx_time += tx_time; 3045 3046 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3047 tx_tspec->downgraded = true; 3048 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3049 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3050 } 3051 } 3052 3053 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3054 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3055 { 3056 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3057 3058 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3059 !sdata->u.mgd.probe_send_count) 3060 return; 3061 3062 if (ack) 3063 sdata->u.mgd.probe_send_count = 0; 3064 else 3065 sdata->u.mgd.nullfunc_failed = true; 3066 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3067 } 3068 3069 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3070 const u8 *src, const u8 *dst, 3071 const u8 *ssid, size_t ssid_len, 3072 struct ieee80211_channel *channel) 3073 { 3074 struct sk_buff *skb; 3075 3076 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3077 ssid, ssid_len, NULL, 0, 3078 IEEE80211_PROBE_FLAG_DIRECTED); 3079 if (skb) 3080 ieee80211_tx_skb(sdata, skb); 3081 } 3082 3083 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3084 { 3085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3086 u8 *dst = sdata->vif.cfg.ap_addr; 3087 u8 unicast_limit = max(1, max_probe_tries - 3); 3088 struct sta_info *sta; 3089 3090 if (WARN_ON(sdata->vif.valid_links)) 3091 return; 3092 3093 /* 3094 * Try sending broadcast probe requests for the last three 3095 * probe requests after the first ones failed since some 3096 * buggy APs only support broadcast probe requests. 3097 */ 3098 if (ifmgd->probe_send_count >= unicast_limit) 3099 dst = NULL; 3100 3101 /* 3102 * When the hardware reports an accurate Tx ACK status, it's 3103 * better to send a nullfunc frame instead of a probe request, 3104 * as it will kick us off the AP quickly if we aren't associated 3105 * anymore. The timeout will be reset if the frame is ACKed by 3106 * the AP. 3107 */ 3108 ifmgd->probe_send_count++; 3109 3110 if (dst) { 3111 mutex_lock(&sdata->local->sta_mtx); 3112 sta = sta_info_get(sdata, dst); 3113 if (!WARN_ON(!sta)) 3114 ieee80211_check_fast_rx(sta); 3115 mutex_unlock(&sdata->local->sta_mtx); 3116 } 3117 3118 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3119 ifmgd->nullfunc_failed = false; 3120 ieee80211_send_nullfunc(sdata->local, sdata, false); 3121 } else { 3122 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3123 sdata->vif.cfg.ssid, 3124 sdata->vif.cfg.ssid_len, 3125 sdata->deflink.u.mgd.bss->channel); 3126 } 3127 3128 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3129 run_again(sdata, ifmgd->probe_timeout); 3130 } 3131 3132 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3133 bool beacon) 3134 { 3135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3136 bool already = false; 3137 3138 if (WARN_ON(sdata->vif.valid_links)) 3139 return; 3140 3141 if (!ieee80211_sdata_running(sdata)) 3142 return; 3143 3144 sdata_lock(sdata); 3145 3146 if (!ifmgd->associated) 3147 goto out; 3148 3149 mutex_lock(&sdata->local->mtx); 3150 3151 if (sdata->local->tmp_channel || sdata->local->scanning) { 3152 mutex_unlock(&sdata->local->mtx); 3153 goto out; 3154 } 3155 3156 if (sdata->local->suspending) { 3157 /* reschedule after resume */ 3158 mutex_unlock(&sdata->local->mtx); 3159 ieee80211_reset_ap_probe(sdata); 3160 goto out; 3161 } 3162 3163 if (beacon) { 3164 mlme_dbg_ratelimited(sdata, 3165 "detected beacon loss from AP (missed %d beacons) - probing\n", 3166 beacon_loss_count); 3167 3168 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3169 } 3170 3171 /* 3172 * The driver/our work has already reported this event or the 3173 * connection monitoring has kicked in and we have already sent 3174 * a probe request. Or maybe the AP died and the driver keeps 3175 * reporting until we disassociate... 3176 * 3177 * In either case we have to ignore the current call to this 3178 * function (except for setting the correct probe reason bit) 3179 * because otherwise we would reset the timer every time and 3180 * never check whether we received a probe response! 3181 */ 3182 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3183 already = true; 3184 3185 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3186 3187 mutex_unlock(&sdata->local->mtx); 3188 3189 if (already) 3190 goto out; 3191 3192 mutex_lock(&sdata->local->iflist_mtx); 3193 ieee80211_recalc_ps(sdata->local); 3194 mutex_unlock(&sdata->local->iflist_mtx); 3195 3196 ifmgd->probe_send_count = 0; 3197 ieee80211_mgd_probe_ap_send(sdata); 3198 out: 3199 sdata_unlock(sdata); 3200 } 3201 3202 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3203 struct ieee80211_vif *vif) 3204 { 3205 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3207 struct cfg80211_bss *cbss; 3208 struct sk_buff *skb; 3209 const struct element *ssid; 3210 int ssid_len; 3211 3212 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3213 sdata->vif.valid_links)) 3214 return NULL; 3215 3216 sdata_assert_lock(sdata); 3217 3218 if (ifmgd->associated) 3219 cbss = sdata->deflink.u.mgd.bss; 3220 else if (ifmgd->auth_data) 3221 cbss = ifmgd->auth_data->bss; 3222 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3223 cbss = ifmgd->assoc_data->link[0].bss; 3224 else 3225 return NULL; 3226 3227 rcu_read_lock(); 3228 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3229 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3230 "invalid SSID element (len=%d)", 3231 ssid ? ssid->datalen : -1)) 3232 ssid_len = 0; 3233 else 3234 ssid_len = ssid->datalen; 3235 3236 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3237 (u32) -1, cbss->channel, 3238 ssid->data, ssid_len, 3239 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3240 rcu_read_unlock(); 3241 3242 return skb; 3243 } 3244 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3245 3246 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3247 const u8 *buf, size_t len, bool tx, 3248 u16 reason, bool reconnect) 3249 { 3250 struct ieee80211_event event = { 3251 .type = MLME_EVENT, 3252 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3253 .u.mlme.reason = reason, 3254 }; 3255 3256 if (tx) 3257 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3258 else 3259 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3260 3261 drv_event_callback(sdata->local, sdata, &event); 3262 } 3263 3264 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3265 { 3266 struct ieee80211_local *local = sdata->local; 3267 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3268 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3269 bool tx; 3270 3271 sdata_lock(sdata); 3272 if (!ifmgd->associated) { 3273 sdata_unlock(sdata); 3274 return; 3275 } 3276 3277 /* in MLO assume we have a link where we can TX the frame */ 3278 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3279 3280 if (!ifmgd->driver_disconnect) { 3281 unsigned int link_id; 3282 3283 /* 3284 * AP is probably out of range (or not reachable for another 3285 * reason) so remove the bss structs for that AP. In the case 3286 * of multi-link, it's not clear that all of them really are 3287 * out of range, but if they weren't the driver likely would 3288 * have switched to just have a single link active? 3289 */ 3290 for (link_id = 0; 3291 link_id < ARRAY_SIZE(sdata->link); 3292 link_id++) { 3293 struct ieee80211_link_data *link; 3294 3295 link = sdata_dereference(sdata->link[link_id], sdata); 3296 if (!link) 3297 continue; 3298 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3299 link->u.mgd.bss = NULL; 3300 } 3301 } 3302 3303 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3304 ifmgd->driver_disconnect ? 3305 WLAN_REASON_DEAUTH_LEAVING : 3306 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3307 tx, frame_buf); 3308 mutex_lock(&local->mtx); 3309 /* the other links will be destroyed */ 3310 sdata->vif.bss_conf.csa_active = false; 3311 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3312 if (sdata->deflink.csa_block_tx) { 3313 ieee80211_wake_vif_queues(local, sdata, 3314 IEEE80211_QUEUE_STOP_REASON_CSA); 3315 sdata->deflink.csa_block_tx = false; 3316 } 3317 mutex_unlock(&local->mtx); 3318 3319 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3320 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3321 ifmgd->reconnect); 3322 ifmgd->reconnect = false; 3323 3324 sdata_unlock(sdata); 3325 } 3326 3327 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3328 { 3329 struct ieee80211_sub_if_data *sdata = 3330 container_of(work, struct ieee80211_sub_if_data, 3331 u.mgd.beacon_connection_loss_work); 3332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3333 3334 if (ifmgd->connection_loss) { 3335 sdata_info(sdata, "Connection to AP %pM lost\n", 3336 sdata->vif.cfg.ap_addr); 3337 __ieee80211_disconnect(sdata); 3338 ifmgd->connection_loss = false; 3339 } else if (ifmgd->driver_disconnect) { 3340 sdata_info(sdata, 3341 "Driver requested disconnection from AP %pM\n", 3342 sdata->vif.cfg.ap_addr); 3343 __ieee80211_disconnect(sdata); 3344 ifmgd->driver_disconnect = false; 3345 } else { 3346 if (ifmgd->associated) 3347 sdata->deflink.u.mgd.beacon_loss_count++; 3348 ieee80211_mgd_probe_ap(sdata, true); 3349 } 3350 } 3351 3352 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3353 { 3354 struct ieee80211_sub_if_data *sdata = 3355 container_of(work, struct ieee80211_sub_if_data, 3356 u.mgd.csa_connection_drop_work); 3357 3358 __ieee80211_disconnect(sdata); 3359 } 3360 3361 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3362 { 3363 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3364 struct ieee80211_hw *hw = &sdata->local->hw; 3365 3366 trace_api_beacon_loss(sdata); 3367 3368 sdata->u.mgd.connection_loss = false; 3369 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3370 } 3371 EXPORT_SYMBOL(ieee80211_beacon_loss); 3372 3373 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3374 { 3375 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3376 struct ieee80211_hw *hw = &sdata->local->hw; 3377 3378 trace_api_connection_loss(sdata); 3379 3380 sdata->u.mgd.connection_loss = true; 3381 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3382 } 3383 EXPORT_SYMBOL(ieee80211_connection_loss); 3384 3385 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3386 { 3387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3388 struct ieee80211_hw *hw = &sdata->local->hw; 3389 3390 trace_api_disconnect(sdata, reconnect); 3391 3392 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3393 return; 3394 3395 sdata->u.mgd.driver_disconnect = true; 3396 sdata->u.mgd.reconnect = reconnect; 3397 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3398 } 3399 EXPORT_SYMBOL(ieee80211_disconnect); 3400 3401 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3402 bool assoc) 3403 { 3404 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3405 3406 sdata_assert_lock(sdata); 3407 3408 if (!assoc) { 3409 /* 3410 * we are not authenticated yet, the only timer that could be 3411 * running is the timeout for the authentication response which 3412 * which is not relevant anymore. 3413 */ 3414 del_timer_sync(&sdata->u.mgd.timer); 3415 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3416 3417 /* other links are destroyed */ 3418 sdata->deflink.u.mgd.conn_flags = 0; 3419 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3420 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3421 BSS_CHANGED_BSSID); 3422 sdata->u.mgd.flags = 0; 3423 mutex_lock(&sdata->local->mtx); 3424 ieee80211_link_release_channel(&sdata->deflink); 3425 mutex_unlock(&sdata->local->mtx); 3426 3427 ieee80211_vif_set_links(sdata, 0); 3428 } 3429 3430 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3431 kfree(auth_data); 3432 sdata->u.mgd.auth_data = NULL; 3433 } 3434 3435 enum assoc_status { 3436 ASSOC_SUCCESS, 3437 ASSOC_REJECTED, 3438 ASSOC_TIMEOUT, 3439 ASSOC_ABANDON, 3440 }; 3441 3442 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3443 enum assoc_status status) 3444 { 3445 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3446 3447 sdata_assert_lock(sdata); 3448 3449 if (status != ASSOC_SUCCESS) { 3450 /* 3451 * we are not associated yet, the only timer that could be 3452 * running is the timeout for the association response which 3453 * which is not relevant anymore. 3454 */ 3455 del_timer_sync(&sdata->u.mgd.timer); 3456 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3457 3458 sdata->deflink.u.mgd.conn_flags = 0; 3459 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3460 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3461 BSS_CHANGED_BSSID); 3462 sdata->u.mgd.flags = 0; 3463 sdata->vif.bss_conf.mu_mimo_owner = false; 3464 3465 mutex_lock(&sdata->local->mtx); 3466 ieee80211_link_release_channel(&sdata->deflink); 3467 mutex_unlock(&sdata->local->mtx); 3468 3469 if (status != ASSOC_REJECTED) { 3470 struct cfg80211_assoc_failure data = { 3471 .timeout = status == ASSOC_TIMEOUT, 3472 }; 3473 int i; 3474 3475 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3476 ARRAY_SIZE(assoc_data->link)); 3477 3478 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3479 data.bss[i] = assoc_data->link[i].bss; 3480 3481 if (sdata->vif.valid_links) 3482 data.ap_mld_addr = assoc_data->ap_addr; 3483 3484 cfg80211_assoc_failure(sdata->dev, &data); 3485 } 3486 3487 ieee80211_vif_set_links(sdata, 0); 3488 } 3489 3490 kfree(assoc_data); 3491 sdata->u.mgd.assoc_data = NULL; 3492 } 3493 3494 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3495 struct ieee80211_mgmt *mgmt, size_t len) 3496 { 3497 struct ieee80211_local *local = sdata->local; 3498 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3499 const struct element *challenge; 3500 u8 *pos; 3501 u32 tx_flags = 0; 3502 struct ieee80211_prep_tx_info info = { 3503 .subtype = IEEE80211_STYPE_AUTH, 3504 }; 3505 3506 pos = mgmt->u.auth.variable; 3507 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3508 len - (pos - (u8 *)mgmt)); 3509 if (!challenge) 3510 return; 3511 auth_data->expected_transaction = 4; 3512 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3513 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3514 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3515 IEEE80211_TX_INTFL_MLME_CONN_TX; 3516 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3517 (void *)challenge, 3518 challenge->datalen + sizeof(*challenge), 3519 auth_data->ap_addr, auth_data->ap_addr, 3520 auth_data->key, auth_data->key_len, 3521 auth_data->key_idx, tx_flags); 3522 } 3523 3524 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3525 { 3526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3527 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3528 struct sta_info *sta; 3529 bool result = true; 3530 3531 sdata_info(sdata, "authenticated\n"); 3532 ifmgd->auth_data->done = true; 3533 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3534 ifmgd->auth_data->timeout_started = true; 3535 run_again(sdata, ifmgd->auth_data->timeout); 3536 3537 /* move station state to auth */ 3538 mutex_lock(&sdata->local->sta_mtx); 3539 sta = sta_info_get(sdata, ap_addr); 3540 if (!sta) { 3541 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3542 result = false; 3543 goto out; 3544 } 3545 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3546 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3547 result = false; 3548 goto out; 3549 } 3550 3551 out: 3552 mutex_unlock(&sdata->local->sta_mtx); 3553 return result; 3554 } 3555 3556 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3557 struct ieee80211_mgmt *mgmt, size_t len) 3558 { 3559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3560 u16 auth_alg, auth_transaction, status_code; 3561 struct ieee80211_event event = { 3562 .type = MLME_EVENT, 3563 .u.mlme.data = AUTH_EVENT, 3564 }; 3565 struct ieee80211_prep_tx_info info = { 3566 .subtype = IEEE80211_STYPE_AUTH, 3567 }; 3568 3569 sdata_assert_lock(sdata); 3570 3571 if (len < 24 + 6) 3572 return; 3573 3574 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3575 return; 3576 3577 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3578 return; 3579 3580 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3581 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3582 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3583 3584 if (auth_alg != ifmgd->auth_data->algorithm || 3585 (auth_alg != WLAN_AUTH_SAE && 3586 auth_transaction != ifmgd->auth_data->expected_transaction) || 3587 (auth_alg == WLAN_AUTH_SAE && 3588 (auth_transaction < ifmgd->auth_data->expected_transaction || 3589 auth_transaction > 2))) { 3590 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3591 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3592 auth_transaction, 3593 ifmgd->auth_data->expected_transaction); 3594 goto notify_driver; 3595 } 3596 3597 if (status_code != WLAN_STATUS_SUCCESS) { 3598 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3599 3600 if (auth_alg == WLAN_AUTH_SAE && 3601 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3602 (auth_transaction == 1 && 3603 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3604 status_code == WLAN_STATUS_SAE_PK)))) { 3605 /* waiting for userspace now */ 3606 ifmgd->auth_data->waiting = true; 3607 ifmgd->auth_data->timeout = 3608 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3609 ifmgd->auth_data->timeout_started = true; 3610 run_again(sdata, ifmgd->auth_data->timeout); 3611 goto notify_driver; 3612 } 3613 3614 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3615 mgmt->sa, status_code); 3616 ieee80211_destroy_auth_data(sdata, false); 3617 event.u.mlme.status = MLME_DENIED; 3618 event.u.mlme.reason = status_code; 3619 drv_event_callback(sdata->local, sdata, &event); 3620 goto notify_driver; 3621 } 3622 3623 switch (ifmgd->auth_data->algorithm) { 3624 case WLAN_AUTH_OPEN: 3625 case WLAN_AUTH_LEAP: 3626 case WLAN_AUTH_FT: 3627 case WLAN_AUTH_SAE: 3628 case WLAN_AUTH_FILS_SK: 3629 case WLAN_AUTH_FILS_SK_PFS: 3630 case WLAN_AUTH_FILS_PK: 3631 break; 3632 case WLAN_AUTH_SHARED_KEY: 3633 if (ifmgd->auth_data->expected_transaction != 4) { 3634 ieee80211_auth_challenge(sdata, mgmt, len); 3635 /* need another frame */ 3636 return; 3637 } 3638 break; 3639 default: 3640 WARN_ONCE(1, "invalid auth alg %d", 3641 ifmgd->auth_data->algorithm); 3642 goto notify_driver; 3643 } 3644 3645 event.u.mlme.status = MLME_SUCCESS; 3646 info.success = 1; 3647 drv_event_callback(sdata->local, sdata, &event); 3648 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3649 (auth_transaction == 2 && 3650 ifmgd->auth_data->expected_transaction == 2)) { 3651 if (!ieee80211_mark_sta_auth(sdata)) 3652 return; /* ignore frame -- wait for timeout */ 3653 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3654 auth_transaction == 2) { 3655 sdata_info(sdata, "SAE peer confirmed\n"); 3656 ifmgd->auth_data->peer_confirmed = true; 3657 } 3658 3659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3660 notify_driver: 3661 drv_mgd_complete_tx(sdata->local, sdata, &info); 3662 } 3663 3664 #define case_WLAN(type) \ 3665 case WLAN_REASON_##type: return #type 3666 3667 const char *ieee80211_get_reason_code_string(u16 reason_code) 3668 { 3669 switch (reason_code) { 3670 case_WLAN(UNSPECIFIED); 3671 case_WLAN(PREV_AUTH_NOT_VALID); 3672 case_WLAN(DEAUTH_LEAVING); 3673 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3674 case_WLAN(DISASSOC_AP_BUSY); 3675 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3676 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3677 case_WLAN(DISASSOC_STA_HAS_LEFT); 3678 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3679 case_WLAN(DISASSOC_BAD_POWER); 3680 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3681 case_WLAN(INVALID_IE); 3682 case_WLAN(MIC_FAILURE); 3683 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3684 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3685 case_WLAN(IE_DIFFERENT); 3686 case_WLAN(INVALID_GROUP_CIPHER); 3687 case_WLAN(INVALID_PAIRWISE_CIPHER); 3688 case_WLAN(INVALID_AKMP); 3689 case_WLAN(UNSUPP_RSN_VERSION); 3690 case_WLAN(INVALID_RSN_IE_CAP); 3691 case_WLAN(IEEE8021X_FAILED); 3692 case_WLAN(CIPHER_SUITE_REJECTED); 3693 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3694 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3695 case_WLAN(DISASSOC_LOW_ACK); 3696 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3697 case_WLAN(QSTA_LEAVE_QBSS); 3698 case_WLAN(QSTA_NOT_USE); 3699 case_WLAN(QSTA_REQUIRE_SETUP); 3700 case_WLAN(QSTA_TIMEOUT); 3701 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3702 case_WLAN(MESH_PEER_CANCELED); 3703 case_WLAN(MESH_MAX_PEERS); 3704 case_WLAN(MESH_CONFIG); 3705 case_WLAN(MESH_CLOSE); 3706 case_WLAN(MESH_MAX_RETRIES); 3707 case_WLAN(MESH_CONFIRM_TIMEOUT); 3708 case_WLAN(MESH_INVALID_GTK); 3709 case_WLAN(MESH_INCONSISTENT_PARAM); 3710 case_WLAN(MESH_INVALID_SECURITY); 3711 case_WLAN(MESH_PATH_ERROR); 3712 case_WLAN(MESH_PATH_NOFORWARD); 3713 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3714 case_WLAN(MAC_EXISTS_IN_MBSS); 3715 case_WLAN(MESH_CHAN_REGULATORY); 3716 case_WLAN(MESH_CHAN); 3717 default: return "<unknown>"; 3718 } 3719 } 3720 3721 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3722 struct ieee80211_mgmt *mgmt, size_t len) 3723 { 3724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3725 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3726 3727 sdata_assert_lock(sdata); 3728 3729 if (len < 24 + 2) 3730 return; 3731 3732 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3733 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3734 return; 3735 } 3736 3737 if (ifmgd->associated && 3738 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3739 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3740 sdata->vif.cfg.ap_addr, reason_code, 3741 ieee80211_get_reason_code_string(reason_code)); 3742 3743 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3744 3745 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3746 reason_code, false); 3747 return; 3748 } 3749 3750 if (ifmgd->assoc_data && 3751 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3752 sdata_info(sdata, 3753 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3754 ifmgd->assoc_data->ap_addr, reason_code, 3755 ieee80211_get_reason_code_string(reason_code)); 3756 3757 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3758 3759 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3760 return; 3761 } 3762 } 3763 3764 3765 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3766 struct ieee80211_mgmt *mgmt, size_t len) 3767 { 3768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3769 u16 reason_code; 3770 3771 sdata_assert_lock(sdata); 3772 3773 if (len < 24 + 2) 3774 return; 3775 3776 if (!ifmgd->associated || 3777 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3778 return; 3779 3780 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3781 3782 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3783 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3784 return; 3785 } 3786 3787 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3788 sdata->vif.cfg.ap_addr, reason_code, 3789 ieee80211_get_reason_code_string(reason_code)); 3790 3791 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3792 3793 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3794 false); 3795 } 3796 3797 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3798 u8 *supp_rates, unsigned int supp_rates_len, 3799 u32 *rates, u32 *basic_rates, 3800 bool *have_higher_than_11mbit, 3801 int *min_rate, int *min_rate_index, 3802 int shift) 3803 { 3804 int i, j; 3805 3806 for (i = 0; i < supp_rates_len; i++) { 3807 int rate = supp_rates[i] & 0x7f; 3808 bool is_basic = !!(supp_rates[i] & 0x80); 3809 3810 if ((rate * 5 * (1 << shift)) > 110) 3811 *have_higher_than_11mbit = true; 3812 3813 /* 3814 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3815 * since they're not rates. 3816 * 3817 * Note: Even though the membership selector and the basic 3818 * rate flag share the same bit, they are not exactly 3819 * the same. 3820 */ 3821 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3822 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3823 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3824 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3825 continue; 3826 3827 for (j = 0; j < sband->n_bitrates; j++) { 3828 struct ieee80211_rate *br; 3829 int brate; 3830 3831 br = &sband->bitrates[j]; 3832 3833 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3834 if (brate == rate) { 3835 *rates |= BIT(j); 3836 if (is_basic) 3837 *basic_rates |= BIT(j); 3838 if ((rate * 5) < *min_rate) { 3839 *min_rate = rate * 5; 3840 *min_rate_index = j; 3841 } 3842 break; 3843 } 3844 } 3845 } 3846 } 3847 3848 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta, 3849 const struct ieee802_11_elems *elems) 3850 { 3851 if (elems->ext_capab_len < 10) 3852 return false; 3853 3854 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3855 return false; 3856 3857 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3858 IEEE80211_HE_MAC_CAP0_TWT_RES; 3859 } 3860 3861 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link, 3862 struct link_sta_info *link_sta, 3863 struct ieee802_11_elems *elems) 3864 { 3865 bool twt = ieee80211_twt_req_supported(link_sta, elems); 3866 3867 if (link->conf->twt_requester != twt) { 3868 link->conf->twt_requester = twt; 3869 return BSS_CHANGED_TWT; 3870 } 3871 return 0; 3872 } 3873 3874 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3875 struct ieee80211_bss_conf *bss_conf, 3876 struct ieee80211_supported_band *sband, 3877 struct link_sta_info *link_sta) 3878 { 3879 const struct ieee80211_sta_he_cap *own_he_cap = 3880 ieee80211_get_he_iftype_cap(sband, 3881 ieee80211_vif_type_p2p(&sdata->vif)); 3882 3883 return bss_conf->he_support && 3884 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3885 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3886 own_he_cap && 3887 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3888 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3889 } 3890 3891 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3892 struct link_sta_info *link_sta, 3893 struct cfg80211_bss *cbss, 3894 struct ieee80211_mgmt *mgmt, 3895 const u8 *elem_start, 3896 unsigned int elem_len, 3897 u64 *changed) 3898 { 3899 struct ieee80211_sub_if_data *sdata = link->sdata; 3900 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3901 struct ieee80211_bss_conf *bss_conf = link->conf; 3902 struct ieee80211_local *local = sdata->local; 3903 struct ieee80211_elems_parse_params parse_params = { 3904 .start = elem_start, 3905 .len = elem_len, 3906 .bss = cbss, 3907 .link_id = link == &sdata->deflink ? -1 : link->link_id, 3908 }; 3909 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3910 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3911 const struct cfg80211_bss_ies *bss_ies = NULL; 3912 struct ieee80211_supported_band *sband; 3913 struct ieee802_11_elems *elems; 3914 u16 capab_info; 3915 bool ret; 3916 3917 elems = ieee802_11_parse_elems_full(&parse_params); 3918 if (!elems) 3919 return false; 3920 3921 /* FIXME: use from STA profile element after parsing that */ 3922 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3923 3924 if (!is_s1g && !elems->supp_rates) { 3925 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3926 ret = false; 3927 goto out; 3928 } 3929 3930 link->u.mgd.tdls_chan_switch_prohibited = 3931 elems->ext_capab && elems->ext_capab_len >= 5 && 3932 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3933 3934 /* 3935 * Some APs are erroneously not including some information in their 3936 * (re)association response frames. Try to recover by using the data 3937 * from the beacon or probe response. This seems to afflict mobile 3938 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3939 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3940 */ 3941 if (!is_6ghz && 3942 ((assoc_data->wmm && !elems->wmm_param) || 3943 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 3944 (!elems->ht_cap_elem || !elems->ht_operation)) || 3945 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 3946 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3947 const struct cfg80211_bss_ies *ies; 3948 struct ieee802_11_elems *bss_elems; 3949 3950 rcu_read_lock(); 3951 ies = rcu_dereference(cbss->ies); 3952 if (ies) 3953 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3954 GFP_ATOMIC); 3955 rcu_read_unlock(); 3956 if (!bss_ies) { 3957 ret = false; 3958 goto out; 3959 } 3960 3961 parse_params.start = bss_ies->data; 3962 parse_params.len = bss_ies->len; 3963 bss_elems = ieee802_11_parse_elems_full(&parse_params); 3964 if (!bss_elems) { 3965 ret = false; 3966 goto out; 3967 } 3968 3969 if (assoc_data->wmm && 3970 !elems->wmm_param && bss_elems->wmm_param) { 3971 elems->wmm_param = bss_elems->wmm_param; 3972 sdata_info(sdata, 3973 "AP bug: WMM param missing from AssocResp\n"); 3974 } 3975 3976 /* 3977 * Also check if we requested HT/VHT, otherwise the AP doesn't 3978 * have to include the IEs in the (re)association response. 3979 */ 3980 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3981 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 3982 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3983 sdata_info(sdata, 3984 "AP bug: HT capability missing from AssocResp\n"); 3985 } 3986 if (!elems->ht_operation && bss_elems->ht_operation && 3987 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 3988 elems->ht_operation = bss_elems->ht_operation; 3989 sdata_info(sdata, 3990 "AP bug: HT operation missing from AssocResp\n"); 3991 } 3992 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3993 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 3994 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3995 sdata_info(sdata, 3996 "AP bug: VHT capa missing from AssocResp\n"); 3997 } 3998 if (!elems->vht_operation && bss_elems->vht_operation && 3999 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4000 elems->vht_operation = bss_elems->vht_operation; 4001 sdata_info(sdata, 4002 "AP bug: VHT operation missing from AssocResp\n"); 4003 } 4004 4005 kfree(bss_elems); 4006 } 4007 4008 /* 4009 * We previously checked these in the beacon/probe response, so 4010 * they should be present here. This is just a safety net. 4011 */ 4012 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4013 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4014 sdata_info(sdata, 4015 "HT AP is missing WMM params or HT capability/operation\n"); 4016 ret = false; 4017 goto out; 4018 } 4019 4020 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4021 (!elems->vht_cap_elem || !elems->vht_operation)) { 4022 sdata_info(sdata, 4023 "VHT AP is missing VHT capability/operation\n"); 4024 ret = false; 4025 goto out; 4026 } 4027 4028 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4029 !elems->he_6ghz_capa) { 4030 sdata_info(sdata, 4031 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4032 ret = false; 4033 goto out; 4034 } 4035 4036 sband = ieee80211_get_link_sband(link); 4037 if (!sband) { 4038 ret = false; 4039 goto out; 4040 } 4041 4042 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4043 (!elems->he_cap || !elems->he_operation)) { 4044 mutex_unlock(&sdata->local->sta_mtx); 4045 sdata_info(sdata, 4046 "HE AP is missing HE capability/operation\n"); 4047 ret = false; 4048 goto out; 4049 } 4050 4051 /* Set up internal HT/VHT capabilities */ 4052 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4053 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4054 elems->ht_cap_elem, 4055 link_sta); 4056 4057 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4058 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4059 elems->vht_cap_elem, 4060 link_sta); 4061 4062 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4063 elems->he_cap) { 4064 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4065 elems->he_cap, 4066 elems->he_cap_len, 4067 elems->he_6ghz_capa, 4068 link_sta); 4069 4070 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4071 if (elems->rsnx && elems->rsnx_len && 4072 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4073 wiphy_ext_feature_isset(local->hw.wiphy, 4074 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4075 bss_conf->twt_protected = true; 4076 else 4077 bss_conf->twt_protected = false; 4078 4079 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 4080 4081 if (elems->eht_operation && elems->eht_cap && 4082 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4083 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4084 elems->he_cap, 4085 elems->he_cap_len, 4086 elems->eht_cap, 4087 elems->eht_cap_len, 4088 link_sta); 4089 4090 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4091 } else { 4092 bss_conf->eht_support = false; 4093 } 4094 } else { 4095 bss_conf->he_support = false; 4096 bss_conf->twt_requester = false; 4097 bss_conf->twt_protected = false; 4098 bss_conf->eht_support = false; 4099 } 4100 4101 bss_conf->twt_broadcast = 4102 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4103 4104 if (bss_conf->he_support) { 4105 bss_conf->he_bss_color.color = 4106 le32_get_bits(elems->he_operation->he_oper_params, 4107 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4108 bss_conf->he_bss_color.partial = 4109 le32_get_bits(elems->he_operation->he_oper_params, 4110 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4111 bss_conf->he_bss_color.enabled = 4112 !le32_get_bits(elems->he_operation->he_oper_params, 4113 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4114 4115 if (bss_conf->he_bss_color.enabled) 4116 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4117 4118 bss_conf->htc_trig_based_pkt_ext = 4119 le32_get_bits(elems->he_operation->he_oper_params, 4120 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4121 bss_conf->frame_time_rts_th = 4122 le32_get_bits(elems->he_operation->he_oper_params, 4123 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4124 4125 bss_conf->uora_exists = !!elems->uora_element; 4126 if (elems->uora_element) 4127 bss_conf->uora_ocw_range = elems->uora_element[0]; 4128 4129 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4130 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4131 /* TODO: OPEN: what happens if BSS color disable is set? */ 4132 } 4133 4134 if (cbss->transmitted_bss) { 4135 bss_conf->nontransmitted = true; 4136 ether_addr_copy(bss_conf->transmitter_bssid, 4137 cbss->transmitted_bss->bssid); 4138 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4139 bss_conf->bssid_index = cbss->bssid_index; 4140 } 4141 4142 /* 4143 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4144 * in their association response, so ignore that data for our own 4145 * configuration. If it changed since the last beacon, we'll get the 4146 * next beacon and update then. 4147 */ 4148 4149 /* 4150 * If an operating mode notification IE is present, override the 4151 * NSS calculation (that would be done in rate_control_rate_init()) 4152 * and use the # of streams from that element. 4153 */ 4154 if (elems->opmode_notif && 4155 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4156 u8 nss; 4157 4158 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4159 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4160 nss += 1; 4161 link_sta->pub->rx_nss = nss; 4162 } 4163 4164 /* 4165 * Always handle WMM once after association regardless 4166 * of the first value the AP uses. Setting -1 here has 4167 * that effect because the AP values is an unsigned 4168 * 4-bit value. 4169 */ 4170 link->u.mgd.wmm_last_param_set = -1; 4171 link->u.mgd.mu_edca_last_param_set = -1; 4172 4173 if (link->u.mgd.disable_wmm_tracking) { 4174 ieee80211_set_wmm_default(link, false, false); 4175 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4176 elems->wmm_param_len, 4177 elems->mu_edca_param_set)) { 4178 /* still enable QoS since we might have HT/VHT */ 4179 ieee80211_set_wmm_default(link, false, true); 4180 /* disable WMM tracking in this case to disable 4181 * tracking WMM parameter changes in the beacon if 4182 * the parameters weren't actually valid. Doing so 4183 * avoids changing parameters very strangely when 4184 * the AP is going back and forth between valid and 4185 * invalid parameters. 4186 */ 4187 link->u.mgd.disable_wmm_tracking = true; 4188 } 4189 4190 if (elems->max_idle_period_ie) { 4191 bss_conf->max_idle_period = 4192 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4193 bss_conf->protected_keep_alive = 4194 !!(elems->max_idle_period_ie->idle_options & 4195 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4196 *changed |= BSS_CHANGED_KEEP_ALIVE; 4197 } else { 4198 bss_conf->max_idle_period = 0; 4199 bss_conf->protected_keep_alive = false; 4200 } 4201 4202 /* set assoc capability (AID was already set earlier), 4203 * ieee80211_set_associated() will tell the driver */ 4204 bss_conf->assoc_capability = capab_info; 4205 4206 ret = true; 4207 out: 4208 kfree(elems); 4209 kfree(bss_ies); 4210 return ret; 4211 } 4212 4213 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4214 struct sta_info *sta, 4215 struct link_sta_info *link_sta, 4216 struct cfg80211_bss *cbss) 4217 { 4218 struct ieee80211_sub_if_data *sdata = link->sdata; 4219 struct ieee80211_local *local = sdata->local; 4220 struct ieee80211_bss *bss = (void *)cbss->priv; 4221 u32 rates = 0, basic_rates = 0; 4222 bool have_higher_than_11mbit = false; 4223 int min_rate = INT_MAX, min_rate_index = -1; 4224 /* this is clearly wrong for MLO but we'll just remove it later */ 4225 int shift = ieee80211_vif_get_shift(&sdata->vif); 4226 struct ieee80211_supported_band *sband; 4227 4228 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4229 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4230 4231 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4232 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4233 ieee80211_s1g_sta_rate_init(sta); 4234 return 0; 4235 } 4236 4237 sband = local->hw.wiphy->bands[cbss->channel->band]; 4238 4239 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4240 &rates, &basic_rates, &have_higher_than_11mbit, 4241 &min_rate, &min_rate_index, shift); 4242 4243 /* 4244 * This used to be a workaround for basic rates missing 4245 * in the association response frame. Now that we no 4246 * longer use the basic rates from there, it probably 4247 * doesn't happen any more, but keep the workaround so 4248 * in case some *other* APs are buggy in different ways 4249 * we can connect -- with a warning. 4250 * Allow this workaround only in case the AP provided at least 4251 * one rate. 4252 */ 4253 if (min_rate_index < 0) { 4254 link_info(link, "No legacy rates in association response\n"); 4255 return -EINVAL; 4256 } else if (!basic_rates) { 4257 link_info(link, "No basic rates, using min rate instead\n"); 4258 basic_rates = BIT(min_rate_index); 4259 } 4260 4261 if (rates) 4262 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4263 else 4264 link_info(link, "No rates found, keeping mandatory only\n"); 4265 4266 link->conf->basic_rates = basic_rates; 4267 4268 /* cf. IEEE 802.11 9.2.12 */ 4269 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4270 have_higher_than_11mbit; 4271 4272 return 0; 4273 } 4274 4275 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4276 struct cfg80211_bss *cbss) 4277 { 4278 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4279 const struct element *ht_cap_elem, *vht_cap_elem; 4280 const struct cfg80211_bss_ies *ies; 4281 const struct ieee80211_ht_cap *ht_cap; 4282 const struct ieee80211_vht_cap *vht_cap; 4283 const struct ieee80211_he_cap_elem *he_cap; 4284 const struct element *he_cap_elem; 4285 u16 mcs_80_map, mcs_160_map; 4286 int i, mcs_nss_size; 4287 bool support_160; 4288 u8 chains = 1; 4289 4290 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4291 return chains; 4292 4293 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4294 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4295 ht_cap = (void *)ht_cap_elem->data; 4296 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4297 /* 4298 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4299 * "Tx Unequal Modulation Supported" fields. 4300 */ 4301 } 4302 4303 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4304 return chains; 4305 4306 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4307 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4308 u8 nss; 4309 u16 tx_mcs_map; 4310 4311 vht_cap = (void *)vht_cap_elem->data; 4312 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4313 for (nss = 8; nss > 0; nss--) { 4314 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4315 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4316 break; 4317 } 4318 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4319 chains = max(chains, nss); 4320 } 4321 4322 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4323 return chains; 4324 4325 ies = rcu_dereference(cbss->ies); 4326 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4327 ies->data, ies->len); 4328 4329 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4330 return chains; 4331 4332 /* skip one byte ext_tag_id */ 4333 he_cap = (void *)(he_cap_elem->data + 1); 4334 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4335 4336 /* invalid HE IE */ 4337 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4338 return chains; 4339 4340 /* mcs_nss is right after he_cap info */ 4341 he_mcs_nss_supp = (void *)(he_cap + 1); 4342 4343 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4344 4345 for (i = 7; i >= 0; i--) { 4346 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4347 4348 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4349 chains = max_t(u8, chains, i + 1); 4350 break; 4351 } 4352 } 4353 4354 support_160 = he_cap->phy_cap_info[0] & 4355 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4356 4357 if (!support_160) 4358 return chains; 4359 4360 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4361 for (i = 7; i >= 0; i--) { 4362 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4363 4364 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4365 chains = max_t(u8, chains, i + 1); 4366 break; 4367 } 4368 } 4369 4370 return chains; 4371 } 4372 4373 static bool 4374 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4375 const struct cfg80211_bss_ies *ies, 4376 const struct ieee80211_he_operation *he_op) 4377 { 4378 const struct element *he_cap_elem; 4379 const struct ieee80211_he_cap_elem *he_cap; 4380 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4381 u16 mcs_80_map_tx, mcs_80_map_rx; 4382 u16 ap_min_req_set; 4383 int mcs_nss_size; 4384 int nss; 4385 4386 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4387 ies->data, ies->len); 4388 4389 /* invalid HE IE */ 4390 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4391 sdata_info(sdata, 4392 "Invalid HE elem, Disable HE\n"); 4393 return false; 4394 } 4395 4396 /* skip one byte ext_tag_id */ 4397 he_cap = (void *)(he_cap_elem->data + 1); 4398 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4399 4400 /* invalid HE IE */ 4401 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4402 sdata_info(sdata, 4403 "Invalid HE elem with nss size, Disable HE\n"); 4404 return false; 4405 } 4406 4407 /* mcs_nss is right after he_cap info */ 4408 he_mcs_nss_supp = (void *)(he_cap + 1); 4409 4410 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4411 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4412 4413 /* P802.11-REVme/D0.3 4414 * 27.1.1 Introduction to the HE PHY 4415 * ... 4416 * An HE STA shall support the following features: 4417 * ... 4418 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4419 * supported channel widths for HE SU PPDUs 4420 */ 4421 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4422 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4423 sdata_info(sdata, 4424 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4425 mcs_80_map_tx, mcs_80_map_rx); 4426 return false; 4427 } 4428 4429 if (!he_op) 4430 return true; 4431 4432 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4433 4434 /* 4435 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4436 * zeroes, which is nonsense, and completely inconsistent with itself 4437 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4438 */ 4439 if (!ap_min_req_set) 4440 return true; 4441 4442 /* make sure the AP is consistent with itself 4443 * 4444 * P802.11-REVme/D0.3 4445 * 26.17.1 Basic HE BSS operation 4446 * 4447 * A STA that is operating in an HE BSS shall be able to receive and 4448 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4449 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4450 * MLME-START.request primitive and shall be able to receive at each of 4451 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4452 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4453 * primitive 4454 */ 4455 for (nss = 8; nss > 0; nss--) { 4456 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4457 u8 ap_rx_val; 4458 u8 ap_tx_val; 4459 4460 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4461 continue; 4462 4463 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4464 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4465 4466 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4467 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4468 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4469 sdata_info(sdata, 4470 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4471 nss, ap_rx_val, ap_rx_val, ap_op_val); 4472 return false; 4473 } 4474 } 4475 4476 return true; 4477 } 4478 4479 static bool 4480 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4481 struct ieee80211_supported_band *sband, 4482 const struct ieee80211_he_operation *he_op) 4483 { 4484 const struct ieee80211_sta_he_cap *sta_he_cap = 4485 ieee80211_get_he_iftype_cap(sband, 4486 ieee80211_vif_type_p2p(&sdata->vif)); 4487 u16 ap_min_req_set; 4488 int i; 4489 4490 if (!sta_he_cap || !he_op) 4491 return false; 4492 4493 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4494 4495 /* 4496 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4497 * zeroes, which is nonsense, and completely inconsistent with itself 4498 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4499 */ 4500 if (!ap_min_req_set) 4501 return true; 4502 4503 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4504 for (i = 0; i < 3; i++) { 4505 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4506 &sta_he_cap->he_mcs_nss_supp; 4507 u16 sta_mcs_map_rx = 4508 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4509 u16 sta_mcs_map_tx = 4510 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4511 u8 nss; 4512 bool verified = true; 4513 4514 /* 4515 * For each band there is a maximum of 8 spatial streams 4516 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4517 * of 2 bits per NSS (1-8), with the values defined in enum 4518 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4519 * capabilities aren't less than the AP's minimum requirements 4520 * for this HE BSS per SS. 4521 * It is enough to find one such band that meets the reqs. 4522 */ 4523 for (nss = 8; nss > 0; nss--) { 4524 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4525 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4526 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4527 4528 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4529 continue; 4530 4531 /* 4532 * Make sure the HE AP doesn't require MCSs that aren't 4533 * supported by the client as required by spec 4534 * 4535 * P802.11-REVme/D0.3 4536 * 26.17.1 Basic HE BSS operation 4537 * 4538 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4539 * a BSS, unless it supports (i.e., is able to both transmit and 4540 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4541 * HE-MCS and NSS set. 4542 */ 4543 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4544 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4545 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4546 verified = false; 4547 break; 4548 } 4549 } 4550 4551 if (verified) 4552 return true; 4553 } 4554 4555 /* If here, STA doesn't meet AP's HE min requirements */ 4556 return false; 4557 } 4558 4559 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4560 struct ieee80211_link_data *link, 4561 struct cfg80211_bss *cbss, 4562 ieee80211_conn_flags_t *conn_flags) 4563 { 4564 struct ieee80211_local *local = sdata->local; 4565 const struct ieee80211_ht_cap *ht_cap = NULL; 4566 const struct ieee80211_ht_operation *ht_oper = NULL; 4567 const struct ieee80211_vht_operation *vht_oper = NULL; 4568 const struct ieee80211_he_operation *he_oper = NULL; 4569 const struct ieee80211_eht_operation *eht_oper = NULL; 4570 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4571 struct ieee80211_supported_band *sband; 4572 struct cfg80211_chan_def chandef; 4573 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4574 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4575 struct ieee80211_bss *bss = (void *)cbss->priv; 4576 struct ieee802_11_elems *elems; 4577 const struct cfg80211_bss_ies *ies; 4578 int ret; 4579 u32 i; 4580 bool have_80mhz; 4581 4582 rcu_read_lock(); 4583 4584 ies = rcu_dereference(cbss->ies); 4585 elems = ieee802_11_parse_elems(ies->data, ies->len, false, cbss); 4586 if (!elems) { 4587 rcu_read_unlock(); 4588 return -ENOMEM; 4589 } 4590 4591 sband = local->hw.wiphy->bands[cbss->channel->band]; 4592 4593 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4594 IEEE80211_CONN_DISABLE_80P80MHZ | 4595 IEEE80211_CONN_DISABLE_160MHZ); 4596 4597 /* disable HT/VHT/HE if we don't support them */ 4598 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4599 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4600 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4601 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4602 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4603 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4604 } 4605 4606 if (!sband->vht_cap.vht_supported && is_5ghz) { 4607 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4608 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4609 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4610 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4611 } 4612 4613 if (!ieee80211_get_he_iftype_cap(sband, 4614 ieee80211_vif_type_p2p(&sdata->vif))) { 4615 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4616 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4617 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4618 } 4619 4620 if (!ieee80211_get_eht_iftype_cap(sband, 4621 ieee80211_vif_type_p2p(&sdata->vif))) { 4622 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4623 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4624 } 4625 4626 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4627 ht_oper = elems->ht_operation; 4628 ht_cap = elems->ht_cap_elem; 4629 4630 if (!ht_cap) { 4631 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4632 ht_oper = NULL; 4633 } 4634 } 4635 4636 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4637 vht_oper = elems->vht_operation; 4638 if (vht_oper && !ht_oper) { 4639 vht_oper = NULL; 4640 sdata_info(sdata, 4641 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4642 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4643 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4644 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4645 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4646 } 4647 4648 if (!elems->vht_cap_elem) { 4649 sdata_info(sdata, 4650 "bad VHT capabilities, disabling VHT\n"); 4651 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4652 vht_oper = NULL; 4653 } 4654 } 4655 4656 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4657 he_oper = elems->he_operation; 4658 4659 if (link && is_6ghz) { 4660 struct ieee80211_bss_conf *bss_conf; 4661 u8 j = 0; 4662 4663 bss_conf = link->conf; 4664 4665 if (elems->pwr_constr_elem) 4666 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4667 4668 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4669 ARRAY_SIZE(elems->tx_pwr_env)); 4670 4671 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4672 if (elems->tx_pwr_env_len[i] > 4673 sizeof(bss_conf->tx_pwr_env[j])) 4674 continue; 4675 4676 bss_conf->tx_pwr_env_num++; 4677 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4678 elems->tx_pwr_env_len[i]); 4679 j++; 4680 } 4681 } 4682 4683 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4684 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4685 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4686 IEEE80211_CONN_DISABLE_EHT; 4687 } 4688 4689 /* 4690 * EHT requires HE to be supported as well. Specifically for 6 GHz 4691 * channels, the operation channel information can only be deduced from 4692 * both the 6 GHz operation information (from the HE operation IE) and 4693 * EHT operation. 4694 */ 4695 if (!(*conn_flags & 4696 (IEEE80211_CONN_DISABLE_HE | 4697 IEEE80211_CONN_DISABLE_EHT)) && 4698 he_oper) { 4699 const struct cfg80211_bss_ies *cbss_ies; 4700 const u8 *eht_oper_ie; 4701 4702 cbss_ies = rcu_dereference(cbss->ies); 4703 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4704 cbss_ies->data, cbss_ies->len); 4705 if (eht_oper_ie && eht_oper_ie[1] >= 4706 1 + sizeof(struct ieee80211_eht_operation)) 4707 eht_oper = (void *)(eht_oper_ie + 3); 4708 else 4709 eht_oper = NULL; 4710 } 4711 4712 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4713 have_80mhz = false; 4714 for (i = 0; i < sband->n_channels; i++) { 4715 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4716 IEEE80211_CHAN_NO_80MHZ)) 4717 continue; 4718 4719 have_80mhz = true; 4720 break; 4721 } 4722 4723 if (!have_80mhz) { 4724 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4725 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4726 } 4727 4728 if (sband->band == NL80211_BAND_S1GHZ) { 4729 s1g_oper = elems->s1g_oper; 4730 if (!s1g_oper) 4731 sdata_info(sdata, 4732 "AP missing S1G operation element?\n"); 4733 } 4734 4735 *conn_flags |= 4736 ieee80211_determine_chantype(sdata, link, *conn_flags, 4737 sband, 4738 cbss->channel, 4739 bss->vht_cap_info, 4740 ht_oper, vht_oper, 4741 he_oper, eht_oper, 4742 s1g_oper, 4743 &chandef, false); 4744 4745 if (link) 4746 link->needed_rx_chains = 4747 min(ieee80211_max_rx_chains(link, cbss), 4748 local->rx_chains); 4749 4750 rcu_read_unlock(); 4751 /* the element data was RCU protected so no longer valid anyway */ 4752 kfree(elems); 4753 elems = NULL; 4754 4755 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4756 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4757 return -EINVAL; 4758 } 4759 4760 if (!link) 4761 return 0; 4762 4763 /* will change later if needed */ 4764 link->smps_mode = IEEE80211_SMPS_OFF; 4765 4766 mutex_lock(&local->mtx); 4767 /* 4768 * If this fails (possibly due to channel context sharing 4769 * on incompatible channels, e.g. 80+80 and 160 sharing the 4770 * same control channel) try to use a smaller bandwidth. 4771 */ 4772 ret = ieee80211_link_use_channel(link, &chandef, 4773 IEEE80211_CHANCTX_SHARED); 4774 4775 /* don't downgrade for 5 and 10 MHz channels, though. */ 4776 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4777 chandef.width == NL80211_CHAN_WIDTH_10) 4778 goto out; 4779 4780 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4781 *conn_flags |= 4782 ieee80211_chandef_downgrade(&chandef); 4783 ret = ieee80211_link_use_channel(link, &chandef, 4784 IEEE80211_CHANCTX_SHARED); 4785 } 4786 out: 4787 mutex_unlock(&local->mtx); 4788 return ret; 4789 } 4790 4791 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4792 struct ieee80211_mgmt *mgmt, 4793 struct ieee802_11_elems *elems, 4794 const u8 *elem_start, unsigned int elem_len) 4795 { 4796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4797 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4798 struct ieee80211_local *local = sdata->local; 4799 unsigned int link_id; 4800 struct sta_info *sta; 4801 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4802 int err; 4803 4804 mutex_lock(&sdata->local->sta_mtx); 4805 /* 4806 * station info was already allocated and inserted before 4807 * the association and should be available to us 4808 */ 4809 sta = sta_info_get(sdata, assoc_data->ap_addr); 4810 if (WARN_ON(!sta)) 4811 goto out_err; 4812 4813 if (sdata->vif.valid_links) { 4814 u16 valid_links = 0; 4815 4816 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4817 if (!assoc_data->link[link_id].bss) 4818 continue; 4819 valid_links |= BIT(link_id); 4820 4821 if (link_id != assoc_data->assoc_link_id) { 4822 err = ieee80211_sta_allocate_link(sta, link_id); 4823 if (err) 4824 goto out_err; 4825 } 4826 } 4827 4828 ieee80211_vif_set_links(sdata, valid_links); 4829 } 4830 4831 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4832 struct ieee80211_link_data *link; 4833 struct link_sta_info *link_sta; 4834 4835 if (!assoc_data->link[link_id].bss) 4836 continue; 4837 4838 link = sdata_dereference(sdata->link[link_id], sdata); 4839 if (WARN_ON(!link)) 4840 goto out_err; 4841 4842 if (sdata->vif.valid_links) 4843 link_info(link, 4844 "local address %pM, AP link address %pM\n", 4845 link->conf->addr, 4846 assoc_data->link[link_id].bss->bssid); 4847 4848 link_sta = rcu_dereference_protected(sta->link[link_id], 4849 lockdep_is_held(&local->sta_mtx)); 4850 if (WARN_ON(!link_sta)) 4851 goto out_err; 4852 4853 if (link_id != assoc_data->assoc_link_id) { 4854 err = ieee80211_prep_channel(sdata, link, 4855 assoc_data->link[link_id].bss, 4856 &link->u.mgd.conn_flags); 4857 if (err) 4858 goto out_err; 4859 } 4860 4861 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 4862 assoc_data->link[link_id].bss); 4863 if (err) 4864 goto out_err; 4865 4866 if (!ieee80211_assoc_config_link(link, link_sta, 4867 assoc_data->link[link_id].bss, 4868 mgmt, elem_start, elem_len, 4869 &changed[link_id])) 4870 goto out_err; 4871 4872 if (link_id != assoc_data->assoc_link_id) { 4873 err = ieee80211_sta_activate_link(sta, link_id); 4874 if (err) 4875 goto out_err; 4876 } 4877 } 4878 4879 rate_control_rate_init(sta); 4880 4881 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 4882 set_sta_flag(sta, WLAN_STA_MFP); 4883 sta->sta.mfp = true; 4884 } else { 4885 sta->sta.mfp = false; 4886 } 4887 4888 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 4889 elems->ext_capab_len); 4890 4891 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 4892 local->hw.queues >= IEEE80211_NUM_ACS; 4893 4894 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 4895 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 4896 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 4897 if (err) { 4898 sdata_info(sdata, 4899 "failed to move station %pM to desired state\n", 4900 sta->sta.addr); 4901 WARN_ON(__sta_info_destroy(sta)); 4902 goto out_err; 4903 } 4904 4905 if (sdata->wdev.use_4addr) 4906 drv_sta_set_4addr(local, sdata, &sta->sta, true); 4907 4908 mutex_unlock(&sdata->local->sta_mtx); 4909 4910 ieee80211_set_associated(sdata, assoc_data, changed); 4911 4912 /* 4913 * If we're using 4-addr mode, let the AP know that we're 4914 * doing so, so that it can create the STA VLAN on its side 4915 */ 4916 if (ifmgd->use_4addr) 4917 ieee80211_send_4addr_nullfunc(local, sdata); 4918 4919 /* 4920 * Start timer to probe the connection to the AP now. 4921 * Also start the timer that will detect beacon loss. 4922 */ 4923 ieee80211_sta_reset_beacon_monitor(sdata); 4924 ieee80211_sta_reset_conn_monitor(sdata); 4925 4926 return true; 4927 out_err: 4928 eth_zero_addr(sdata->vif.cfg.ap_addr); 4929 mutex_unlock(&sdata->local->sta_mtx); 4930 return false; 4931 } 4932 4933 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 4934 struct ieee80211_mgmt *mgmt, 4935 size_t len) 4936 { 4937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4938 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4939 u16 capab_info, status_code, aid; 4940 struct ieee802_11_elems *elems; 4941 int ac; 4942 const u8 *elem_start; 4943 unsigned int elem_len; 4944 bool reassoc; 4945 struct ieee80211_event event = { 4946 .type = MLME_EVENT, 4947 .u.mlme.data = ASSOC_EVENT, 4948 }; 4949 struct ieee80211_prep_tx_info info = {}; 4950 struct cfg80211_rx_assoc_resp resp = { 4951 .uapsd_queues = -1, 4952 }; 4953 unsigned int link_id; 4954 4955 sdata_assert_lock(sdata); 4956 4957 if (!assoc_data) 4958 return; 4959 4960 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 4961 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 4962 return; 4963 4964 /* 4965 * AssocResp and ReassocResp have identical structure, so process both 4966 * of them in this function. 4967 */ 4968 4969 if (len < 24 + 6) 4970 return; 4971 4972 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 4973 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4974 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 4975 if (assoc_data->s1g) 4976 elem_start = mgmt->u.s1g_assoc_resp.variable; 4977 else 4978 elem_start = mgmt->u.assoc_resp.variable; 4979 4980 /* 4981 * Note: this may not be perfect, AP might misbehave - if 4982 * anyone needs to rely on perfect complete notification 4983 * with the exact right subtype, then we need to track what 4984 * we actually transmitted. 4985 */ 4986 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 4987 IEEE80211_STYPE_ASSOC_REQ; 4988 4989 if (assoc_data->fils_kek_len && 4990 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 4991 return; 4992 4993 elem_len = len - (elem_start - (u8 *)mgmt); 4994 elems = ieee802_11_parse_elems(elem_start, elem_len, false, NULL); 4995 if (!elems) 4996 goto notify_driver; 4997 4998 if (elems->aid_resp) 4999 aid = le16_to_cpu(elems->aid_resp->aid); 5000 else if (assoc_data->s1g) 5001 aid = 0; /* TODO */ 5002 else 5003 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5004 5005 /* 5006 * The 5 MSB of the AID field are reserved 5007 * (802.11-2016 9.4.1.8 AID field) 5008 */ 5009 aid &= 0x7ff; 5010 5011 sdata_info(sdata, 5012 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5013 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5014 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5015 5016 ifmgd->broken_ap = false; 5017 5018 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5019 elems->timeout_int && 5020 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5021 u32 tu, ms; 5022 5023 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5024 le32_to_cpu(elems->timeout_int->value)); 5025 5026 tu = le32_to_cpu(elems->timeout_int->value); 5027 ms = tu * 1024 / 1000; 5028 sdata_info(sdata, 5029 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5030 assoc_data->ap_addr, tu, ms); 5031 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5032 assoc_data->timeout_started = true; 5033 if (ms > IEEE80211_ASSOC_TIMEOUT) 5034 run_again(sdata, assoc_data->timeout); 5035 goto notify_driver; 5036 } 5037 5038 if (status_code != WLAN_STATUS_SUCCESS) { 5039 sdata_info(sdata, "%pM denied association (code=%d)\n", 5040 assoc_data->ap_addr, status_code); 5041 event.u.mlme.status = MLME_DENIED; 5042 event.u.mlme.reason = status_code; 5043 drv_event_callback(sdata->local, sdata, &event); 5044 } else { 5045 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5046 sdata_info(sdata, 5047 "invalid AID value %d (out of range), turn off PS\n", 5048 aid); 5049 aid = 0; 5050 ifmgd->broken_ap = true; 5051 } 5052 5053 if (sdata->vif.valid_links) { 5054 if (!elems->multi_link) { 5055 sdata_info(sdata, 5056 "MLO association with %pM but no multi-link element in response!\n", 5057 assoc_data->ap_addr); 5058 goto abandon_assoc; 5059 } 5060 5061 if (le16_get_bits(elems->multi_link->control, 5062 IEEE80211_ML_CONTROL_TYPE) != 5063 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5064 sdata_info(sdata, 5065 "bad multi-link element (control=0x%x)\n", 5066 le16_to_cpu(elems->multi_link->control)); 5067 goto abandon_assoc; 5068 } else { 5069 struct ieee80211_mle_basic_common_info *common; 5070 5071 common = (void *)elems->multi_link->variable; 5072 5073 if (memcmp(assoc_data->ap_addr, 5074 common->mld_mac_addr, ETH_ALEN)) { 5075 sdata_info(sdata, 5076 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5077 common->mld_mac_addr, 5078 assoc_data->ap_addr); 5079 goto abandon_assoc; 5080 } 5081 } 5082 } 5083 5084 sdata->vif.cfg.aid = aid; 5085 5086 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5087 elem_start, elem_len)) { 5088 /* oops -- internal error -- send timeout for now */ 5089 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5090 goto notify_driver; 5091 } 5092 event.u.mlme.status = MLME_SUCCESS; 5093 drv_event_callback(sdata->local, sdata, &event); 5094 sdata_info(sdata, "associated\n"); 5095 5096 info.success = 1; 5097 } 5098 5099 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5100 struct ieee80211_link_data *link; 5101 5102 link = sdata_dereference(sdata->link[link_id], sdata); 5103 if (!link) 5104 continue; 5105 if (!assoc_data->link[link_id].bss) 5106 continue; 5107 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5108 resp.links[link_id].addr = link->conf->addr; 5109 5110 /* get uapsd queues configuration - same for all links */ 5111 resp.uapsd_queues = 0; 5112 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5113 if (link->tx_conf[ac].uapsd) 5114 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5115 } 5116 5117 ieee80211_destroy_assoc_data(sdata, 5118 status_code == WLAN_STATUS_SUCCESS ? 5119 ASSOC_SUCCESS : 5120 ASSOC_REJECTED); 5121 5122 resp.buf = (u8 *)mgmt; 5123 resp.len = len; 5124 resp.req_ies = ifmgd->assoc_req_ies; 5125 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5126 if (sdata->vif.valid_links) 5127 resp.ap_mld_addr = assoc_data->ap_addr; 5128 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5129 notify_driver: 5130 drv_mgd_complete_tx(sdata->local, sdata, &info); 5131 kfree(elems); 5132 return; 5133 abandon_assoc: 5134 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5135 goto notify_driver; 5136 } 5137 5138 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5139 struct ieee80211_mgmt *mgmt, size_t len, 5140 struct ieee80211_rx_status *rx_status) 5141 { 5142 struct ieee80211_sub_if_data *sdata = link->sdata; 5143 struct ieee80211_local *local = sdata->local; 5144 struct ieee80211_bss *bss; 5145 struct ieee80211_channel *channel; 5146 5147 sdata_assert_lock(sdata); 5148 5149 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5150 ieee80211_rx_status_to_khz(rx_status)); 5151 if (!channel) 5152 return; 5153 5154 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5155 if (bss) { 5156 link->conf->beacon_rate = bss->beacon_rate; 5157 ieee80211_rx_bss_put(local, bss); 5158 } 5159 } 5160 5161 5162 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5163 struct sk_buff *skb) 5164 { 5165 struct ieee80211_sub_if_data *sdata = link->sdata; 5166 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5167 struct ieee80211_if_managed *ifmgd; 5168 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5169 struct ieee80211_channel *channel; 5170 size_t baselen, len = skb->len; 5171 5172 ifmgd = &sdata->u.mgd; 5173 5174 sdata_assert_lock(sdata); 5175 5176 /* 5177 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5178 * "If a 6 GHz AP receives a Probe Request frame and responds with 5179 * a Probe Response frame [..], the Address 1 field of the Probe 5180 * Response frame shall be set to the broadcast address [..]" 5181 * So, on 6GHz band we should also accept broadcast responses. 5182 */ 5183 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5184 rx_status->freq); 5185 if (!channel) 5186 return; 5187 5188 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5189 (channel->band != NL80211_BAND_6GHZ || 5190 !is_broadcast_ether_addr(mgmt->da))) 5191 return; /* ignore ProbeResp to foreign address */ 5192 5193 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5194 if (baselen > len) 5195 return; 5196 5197 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5198 5199 if (ifmgd->associated && 5200 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5201 ieee80211_reset_ap_probe(sdata); 5202 } 5203 5204 /* 5205 * This is the canonical list of information elements we care about, 5206 * the filter code also gives us all changes to the Microsoft OUI 5207 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5208 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5209 * changes to requested client power. 5210 * 5211 * We implement beacon filtering in software since that means we can 5212 * avoid processing the frame here and in cfg80211, and userspace 5213 * will not be able to tell whether the hardware supports it or not. 5214 * 5215 * XXX: This list needs to be dynamic -- userspace needs to be able to 5216 * add items it requires. It also needs to be able to tell us to 5217 * look out for other vendor IEs. 5218 */ 5219 static const u64 care_about_ies = 5220 (1ULL << WLAN_EID_COUNTRY) | 5221 (1ULL << WLAN_EID_ERP_INFO) | 5222 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5223 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5224 (1ULL << WLAN_EID_HT_CAPABILITY) | 5225 (1ULL << WLAN_EID_HT_OPERATION) | 5226 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5227 5228 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5229 struct ieee80211_if_managed *ifmgd, 5230 struct ieee80211_bss_conf *bss_conf, 5231 struct ieee80211_local *local, 5232 struct ieee80211_rx_status *rx_status) 5233 { 5234 struct ieee80211_sub_if_data *sdata = link->sdata; 5235 5236 /* Track average RSSI from the Beacon frames of the current AP */ 5237 5238 if (!link->u.mgd.tracking_signal_avg) { 5239 link->u.mgd.tracking_signal_avg = true; 5240 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5241 link->u.mgd.last_cqm_event_signal = 0; 5242 link->u.mgd.count_beacon_signal = 1; 5243 link->u.mgd.last_ave_beacon_signal = 0; 5244 } else { 5245 link->u.mgd.count_beacon_signal++; 5246 } 5247 5248 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5249 -rx_status->signal); 5250 5251 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5252 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5253 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5254 int last_sig = link->u.mgd.last_ave_beacon_signal; 5255 struct ieee80211_event event = { 5256 .type = RSSI_EVENT, 5257 }; 5258 5259 /* 5260 * if signal crosses either of the boundaries, invoke callback 5261 * with appropriate parameters 5262 */ 5263 if (sig > ifmgd->rssi_max_thold && 5264 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5265 link->u.mgd.last_ave_beacon_signal = sig; 5266 event.u.rssi.data = RSSI_EVENT_HIGH; 5267 drv_event_callback(local, sdata, &event); 5268 } else if (sig < ifmgd->rssi_min_thold && 5269 (last_sig >= ifmgd->rssi_max_thold || 5270 last_sig == 0)) { 5271 link->u.mgd.last_ave_beacon_signal = sig; 5272 event.u.rssi.data = RSSI_EVENT_LOW; 5273 drv_event_callback(local, sdata, &event); 5274 } 5275 } 5276 5277 if (bss_conf->cqm_rssi_thold && 5278 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5279 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5280 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5281 int last_event = link->u.mgd.last_cqm_event_signal; 5282 int thold = bss_conf->cqm_rssi_thold; 5283 int hyst = bss_conf->cqm_rssi_hyst; 5284 5285 if (sig < thold && 5286 (last_event == 0 || sig < last_event - hyst)) { 5287 link->u.mgd.last_cqm_event_signal = sig; 5288 ieee80211_cqm_rssi_notify( 5289 &sdata->vif, 5290 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5291 sig, GFP_KERNEL); 5292 } else if (sig > thold && 5293 (last_event == 0 || sig > last_event + hyst)) { 5294 link->u.mgd.last_cqm_event_signal = sig; 5295 ieee80211_cqm_rssi_notify( 5296 &sdata->vif, 5297 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5298 sig, GFP_KERNEL); 5299 } 5300 } 5301 5302 if (bss_conf->cqm_rssi_low && 5303 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5304 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5305 int last_event = link->u.mgd.last_cqm_event_signal; 5306 int low = bss_conf->cqm_rssi_low; 5307 int high = bss_conf->cqm_rssi_high; 5308 5309 if (sig < low && 5310 (last_event == 0 || last_event >= low)) { 5311 link->u.mgd.last_cqm_event_signal = sig; 5312 ieee80211_cqm_rssi_notify( 5313 &sdata->vif, 5314 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5315 sig, GFP_KERNEL); 5316 } else if (sig > high && 5317 (last_event == 0 || last_event <= high)) { 5318 link->u.mgd.last_cqm_event_signal = sig; 5319 ieee80211_cqm_rssi_notify( 5320 &sdata->vif, 5321 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5322 sig, GFP_KERNEL); 5323 } 5324 } 5325 } 5326 5327 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5328 struct cfg80211_bss *bss) 5329 { 5330 if (ether_addr_equal(tx_bssid, bss->bssid)) 5331 return true; 5332 if (!bss->transmitted_bss) 5333 return false; 5334 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5335 } 5336 5337 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5338 struct ieee80211_hdr *hdr, size_t len, 5339 struct ieee80211_rx_status *rx_status) 5340 { 5341 struct ieee80211_sub_if_data *sdata = link->sdata; 5342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5343 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5344 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5345 struct ieee80211_mgmt *mgmt = (void *) hdr; 5346 size_t baselen; 5347 struct ieee802_11_elems *elems; 5348 struct ieee80211_local *local = sdata->local; 5349 struct ieee80211_chanctx_conf *chanctx_conf; 5350 struct ieee80211_channel *chan; 5351 struct link_sta_info *link_sta; 5352 struct sta_info *sta; 5353 u32 changed = 0; 5354 bool erp_valid; 5355 u8 erp_value = 0; 5356 u32 ncrc = 0; 5357 u8 *bssid, *variable = mgmt->u.beacon.variable; 5358 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5359 5360 sdata_assert_lock(sdata); 5361 5362 /* Process beacon from the current BSS */ 5363 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5364 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5365 struct ieee80211_ext *ext = (void *) mgmt; 5366 5367 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5368 variable = ext->u.s1g_short_beacon.variable; 5369 else 5370 variable = ext->u.s1g_beacon.variable; 5371 } 5372 5373 baselen = (u8 *) variable - (u8 *) mgmt; 5374 if (baselen > len) 5375 return; 5376 5377 rcu_read_lock(); 5378 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5379 if (!chanctx_conf) { 5380 rcu_read_unlock(); 5381 return; 5382 } 5383 5384 if (ieee80211_rx_status_to_khz(rx_status) != 5385 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5386 rcu_read_unlock(); 5387 return; 5388 } 5389 chan = chanctx_conf->def.chan; 5390 rcu_read_unlock(); 5391 5392 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5393 !WARN_ON(sdata->vif.valid_links) && 5394 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5395 elems = ieee802_11_parse_elems(variable, len - baselen, false, 5396 ifmgd->assoc_data->link[0].bss); 5397 if (!elems) 5398 return; 5399 5400 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5401 5402 if (elems->dtim_period) 5403 link->u.mgd.dtim_period = elems->dtim_period; 5404 link->u.mgd.have_beacon = true; 5405 ifmgd->assoc_data->need_beacon = false; 5406 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5407 link->conf->sync_tsf = 5408 le64_to_cpu(mgmt->u.beacon.timestamp); 5409 link->conf->sync_device_ts = 5410 rx_status->device_timestamp; 5411 link->conf->sync_dtim_count = elems->dtim_count; 5412 } 5413 5414 if (elems->mbssid_config_ie) 5415 bss_conf->profile_periodicity = 5416 elems->mbssid_config_ie->profile_periodicity; 5417 else 5418 bss_conf->profile_periodicity = 0; 5419 5420 if (elems->ext_capab_len >= 11 && 5421 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5422 bss_conf->ema_ap = true; 5423 else 5424 bss_conf->ema_ap = false; 5425 5426 /* continue assoc process */ 5427 ifmgd->assoc_data->timeout = jiffies; 5428 ifmgd->assoc_data->timeout_started = true; 5429 run_again(sdata, ifmgd->assoc_data->timeout); 5430 kfree(elems); 5431 return; 5432 } 5433 5434 if (!ifmgd->associated || 5435 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5436 return; 5437 bssid = link->u.mgd.bssid; 5438 5439 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5440 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5441 local, rx_status); 5442 5443 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5444 mlme_dbg_ratelimited(sdata, 5445 "cancelling AP probe due to a received beacon\n"); 5446 ieee80211_reset_ap_probe(sdata); 5447 } 5448 5449 /* 5450 * Push the beacon loss detection into the future since 5451 * we are processing a beacon from the AP just now. 5452 */ 5453 ieee80211_sta_reset_beacon_monitor(sdata); 5454 5455 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5456 * element (which carries the beacon interval). Don't forget to add a 5457 * bit to care_about_ies[] above if mac80211 is interested in a 5458 * changing S1G element. 5459 */ 5460 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5461 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5462 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 5463 false, care_about_ies, ncrc, 5464 link->u.mgd.bss); 5465 if (!elems) 5466 return; 5467 ncrc = elems->crc; 5468 5469 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5470 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5471 if (local->hw.conf.dynamic_ps_timeout > 0) { 5472 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5473 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5474 ieee80211_hw_config(local, 5475 IEEE80211_CONF_CHANGE_PS); 5476 } 5477 ieee80211_send_nullfunc(local, sdata, false); 5478 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5479 local->pspolling = true; 5480 5481 /* 5482 * Here is assumed that the driver will be 5483 * able to send ps-poll frame and receive a 5484 * response even though power save mode is 5485 * enabled, but some drivers might require 5486 * to disable power save here. This needs 5487 * to be investigated. 5488 */ 5489 ieee80211_send_pspoll(local, sdata); 5490 } 5491 } 5492 5493 if (sdata->vif.p2p || 5494 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5495 struct ieee80211_p2p_noa_attr noa = {}; 5496 int ret; 5497 5498 ret = cfg80211_get_p2p_attr(variable, 5499 len - baselen, 5500 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5501 (u8 *) &noa, sizeof(noa)); 5502 if (ret >= 2) { 5503 if (link->u.mgd.p2p_noa_index != noa.index) { 5504 /* valid noa_attr and index changed */ 5505 link->u.mgd.p2p_noa_index = noa.index; 5506 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5507 changed |= BSS_CHANGED_P2P_PS; 5508 /* 5509 * make sure we update all information, the CRC 5510 * mechanism doesn't look at P2P attributes. 5511 */ 5512 link->u.mgd.beacon_crc_valid = false; 5513 } 5514 } else if (link->u.mgd.p2p_noa_index != -1) { 5515 /* noa_attr not found and we had valid noa_attr before */ 5516 link->u.mgd.p2p_noa_index = -1; 5517 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5518 changed |= BSS_CHANGED_P2P_PS; 5519 link->u.mgd.beacon_crc_valid = false; 5520 } 5521 } 5522 5523 if (link->u.mgd.csa_waiting_bcn) 5524 ieee80211_chswitch_post_beacon(link); 5525 5526 /* 5527 * Update beacon timing and dtim count on every beacon appearance. This 5528 * will allow the driver to use the most updated values. Do it before 5529 * comparing this one with last received beacon. 5530 * IMPORTANT: These parameters would possibly be out of sync by the time 5531 * the driver will use them. The synchronized view is currently 5532 * guaranteed only in certain callbacks. 5533 */ 5534 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5535 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5536 link->conf->sync_tsf = 5537 le64_to_cpu(mgmt->u.beacon.timestamp); 5538 link->conf->sync_device_ts = 5539 rx_status->device_timestamp; 5540 link->conf->sync_dtim_count = elems->dtim_count; 5541 } 5542 5543 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5544 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5545 goto free; 5546 link->u.mgd.beacon_crc = ncrc; 5547 link->u.mgd.beacon_crc_valid = true; 5548 5549 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5550 5551 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5552 rx_status->device_timestamp, 5553 elems, true); 5554 5555 if (!link->u.mgd.disable_wmm_tracking && 5556 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5557 elems->wmm_param_len, 5558 elems->mu_edca_param_set)) 5559 changed |= BSS_CHANGED_QOS; 5560 5561 /* 5562 * If we haven't had a beacon before, tell the driver about the 5563 * DTIM period (and beacon timing if desired) now. 5564 */ 5565 if (!link->u.mgd.have_beacon) { 5566 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5567 bss_conf->dtim_period = elems->dtim_period ?: 1; 5568 5569 changed |= BSS_CHANGED_BEACON_INFO; 5570 link->u.mgd.have_beacon = true; 5571 5572 mutex_lock(&local->iflist_mtx); 5573 ieee80211_recalc_ps(local); 5574 mutex_unlock(&local->iflist_mtx); 5575 5576 ieee80211_recalc_ps_vif(sdata); 5577 } 5578 5579 if (elems->erp_info) { 5580 erp_valid = true; 5581 erp_value = elems->erp_info[0]; 5582 } else { 5583 erp_valid = false; 5584 } 5585 5586 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5587 changed |= ieee80211_handle_bss_capability(link, 5588 le16_to_cpu(mgmt->u.beacon.capab_info), 5589 erp_valid, erp_value); 5590 5591 mutex_lock(&local->sta_mtx); 5592 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5593 if (WARN_ON(!sta)) 5594 goto free; 5595 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5596 lockdep_is_held(&local->sta_mtx)); 5597 if (WARN_ON(!link_sta)) 5598 goto free; 5599 5600 changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 5601 5602 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5603 elems->vht_cap_elem, elems->ht_operation, 5604 elems->vht_operation, elems->he_operation, 5605 elems->eht_operation, 5606 elems->s1g_oper, bssid, &changed)) { 5607 mutex_unlock(&local->sta_mtx); 5608 sdata_info(sdata, 5609 "failed to follow AP %pM bandwidth change, disconnect\n", 5610 bssid); 5611 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5612 WLAN_REASON_DEAUTH_LEAVING, 5613 true, deauth_buf); 5614 ieee80211_report_disconnect(sdata, deauth_buf, 5615 sizeof(deauth_buf), true, 5616 WLAN_REASON_DEAUTH_LEAVING, 5617 false); 5618 goto free; 5619 } 5620 5621 if (sta && elems->opmode_notif) 5622 ieee80211_vht_handle_opmode(sdata, link_sta, 5623 *elems->opmode_notif, 5624 rx_status->band); 5625 mutex_unlock(&local->sta_mtx); 5626 5627 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5628 elems->country_elem, 5629 elems->country_elem_len, 5630 elems->pwr_constr_elem, 5631 elems->cisco_dtpc_elem); 5632 5633 ieee80211_link_info_change_notify(sdata, link, changed); 5634 free: 5635 kfree(elems); 5636 } 5637 5638 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5639 struct sk_buff *skb) 5640 { 5641 struct ieee80211_link_data *link = &sdata->deflink; 5642 struct ieee80211_rx_status *rx_status; 5643 struct ieee80211_hdr *hdr; 5644 u16 fc; 5645 5646 rx_status = (struct ieee80211_rx_status *) skb->cb; 5647 hdr = (struct ieee80211_hdr *) skb->data; 5648 fc = le16_to_cpu(hdr->frame_control); 5649 5650 sdata_lock(sdata); 5651 switch (fc & IEEE80211_FCTL_STYPE) { 5652 case IEEE80211_STYPE_S1G_BEACON: 5653 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5654 break; 5655 } 5656 sdata_unlock(sdata); 5657 } 5658 5659 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5660 struct sk_buff *skb) 5661 { 5662 struct ieee80211_link_data *link = &sdata->deflink; 5663 struct ieee80211_rx_status *rx_status; 5664 struct ieee80211_mgmt *mgmt; 5665 u16 fc; 5666 int ies_len; 5667 5668 rx_status = (struct ieee80211_rx_status *) skb->cb; 5669 mgmt = (struct ieee80211_mgmt *) skb->data; 5670 fc = le16_to_cpu(mgmt->frame_control); 5671 5672 sdata_lock(sdata); 5673 5674 switch (fc & IEEE80211_FCTL_STYPE) { 5675 case IEEE80211_STYPE_BEACON: 5676 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5677 skb->len, rx_status); 5678 break; 5679 case IEEE80211_STYPE_PROBE_RESP: 5680 ieee80211_rx_mgmt_probe_resp(link, skb); 5681 break; 5682 case IEEE80211_STYPE_AUTH: 5683 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5684 break; 5685 case IEEE80211_STYPE_DEAUTH: 5686 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5687 break; 5688 case IEEE80211_STYPE_DISASSOC: 5689 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5690 break; 5691 case IEEE80211_STYPE_ASSOC_RESP: 5692 case IEEE80211_STYPE_REASSOC_RESP: 5693 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5694 break; 5695 case IEEE80211_STYPE_ACTION: 5696 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 5697 struct ieee802_11_elems *elems; 5698 5699 ies_len = skb->len - 5700 offsetof(struct ieee80211_mgmt, 5701 u.action.u.chan_switch.variable); 5702 5703 if (ies_len < 0) 5704 break; 5705 5706 /* CSA IE cannot be overridden, no need for BSSID */ 5707 elems = ieee802_11_parse_elems( 5708 mgmt->u.action.u.chan_switch.variable, 5709 ies_len, true, NULL); 5710 5711 if (elems && !elems->parse_error) 5712 ieee80211_sta_process_chanswitch(link, 5713 rx_status->mactime, 5714 rx_status->device_timestamp, 5715 elems, false); 5716 kfree(elems); 5717 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 5718 struct ieee802_11_elems *elems; 5719 5720 ies_len = skb->len - 5721 offsetof(struct ieee80211_mgmt, 5722 u.action.u.ext_chan_switch.variable); 5723 5724 if (ies_len < 0) 5725 break; 5726 5727 /* 5728 * extended CSA IE can't be overridden, no need for 5729 * BSSID 5730 */ 5731 elems = ieee802_11_parse_elems( 5732 mgmt->u.action.u.ext_chan_switch.variable, 5733 ies_len, true, NULL); 5734 5735 if (elems && !elems->parse_error) { 5736 /* for the handling code pretend it was an IE */ 5737 elems->ext_chansw_ie = 5738 &mgmt->u.action.u.ext_chan_switch.data; 5739 5740 ieee80211_sta_process_chanswitch(link, 5741 rx_status->mactime, 5742 rx_status->device_timestamp, 5743 elems, false); 5744 } 5745 5746 kfree(elems); 5747 } 5748 break; 5749 } 5750 sdata_unlock(sdata); 5751 } 5752 5753 static void ieee80211_sta_timer(struct timer_list *t) 5754 { 5755 struct ieee80211_sub_if_data *sdata = 5756 from_timer(sdata, t, u.mgd.timer); 5757 5758 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 5759 } 5760 5761 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 5762 u8 reason, bool tx) 5763 { 5764 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5765 5766 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 5767 tx, frame_buf); 5768 5769 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5770 reason, false); 5771 } 5772 5773 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 5774 { 5775 struct ieee80211_local *local = sdata->local; 5776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5777 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 5778 u32 tx_flags = 0; 5779 u16 trans = 1; 5780 u16 status = 0; 5781 struct ieee80211_prep_tx_info info = { 5782 .subtype = IEEE80211_STYPE_AUTH, 5783 }; 5784 5785 sdata_assert_lock(sdata); 5786 5787 if (WARN_ON_ONCE(!auth_data)) 5788 return -EINVAL; 5789 5790 auth_data->tries++; 5791 5792 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 5793 sdata_info(sdata, "authentication with %pM timed out\n", 5794 auth_data->ap_addr); 5795 5796 /* 5797 * Most likely AP is not in the range so remove the 5798 * bss struct for that AP. 5799 */ 5800 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 5801 5802 return -ETIMEDOUT; 5803 } 5804 5805 if (auth_data->algorithm == WLAN_AUTH_SAE) 5806 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 5807 5808 drv_mgd_prepare_tx(local, sdata, &info); 5809 5810 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 5811 auth_data->ap_addr, auth_data->tries, 5812 IEEE80211_AUTH_MAX_TRIES); 5813 5814 auth_data->expected_transaction = 2; 5815 5816 if (auth_data->algorithm == WLAN_AUTH_SAE) { 5817 trans = auth_data->sae_trans; 5818 status = auth_data->sae_status; 5819 auth_data->expected_transaction = trans; 5820 } 5821 5822 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5823 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 5824 IEEE80211_TX_INTFL_MLME_CONN_TX; 5825 5826 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 5827 auth_data->data, auth_data->data_len, 5828 auth_data->ap_addr, auth_data->ap_addr, 5829 NULL, 0, 0, tx_flags); 5830 5831 if (tx_flags == 0) { 5832 if (auth_data->algorithm == WLAN_AUTH_SAE) 5833 auth_data->timeout = jiffies + 5834 IEEE80211_AUTH_TIMEOUT_SAE; 5835 else 5836 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 5837 } else { 5838 auth_data->timeout = 5839 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 5840 } 5841 5842 auth_data->timeout_started = true; 5843 run_again(sdata, auth_data->timeout); 5844 5845 return 0; 5846 } 5847 5848 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 5849 { 5850 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 5851 struct ieee80211_local *local = sdata->local; 5852 int ret; 5853 5854 sdata_assert_lock(sdata); 5855 5856 assoc_data->tries++; 5857 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 5858 sdata_info(sdata, "association with %pM timed out\n", 5859 assoc_data->ap_addr); 5860 5861 /* 5862 * Most likely AP is not in the range so remove the 5863 * bss struct for that AP. 5864 */ 5865 cfg80211_unlink_bss(local->hw.wiphy, 5866 assoc_data->link[assoc_data->assoc_link_id].bss); 5867 5868 return -ETIMEDOUT; 5869 } 5870 5871 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 5872 assoc_data->ap_addr, assoc_data->tries, 5873 IEEE80211_ASSOC_MAX_TRIES); 5874 ret = ieee80211_send_assoc(sdata); 5875 if (ret) 5876 return ret; 5877 5878 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 5879 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 5880 assoc_data->timeout_started = true; 5881 run_again(sdata, assoc_data->timeout); 5882 } else { 5883 assoc_data->timeout = 5884 round_jiffies_up(jiffies + 5885 IEEE80211_ASSOC_TIMEOUT_LONG); 5886 assoc_data->timeout_started = true; 5887 run_again(sdata, assoc_data->timeout); 5888 } 5889 5890 return 0; 5891 } 5892 5893 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 5894 __le16 fc, bool acked) 5895 { 5896 struct ieee80211_local *local = sdata->local; 5897 5898 sdata->u.mgd.status_fc = fc; 5899 sdata->u.mgd.status_acked = acked; 5900 sdata->u.mgd.status_received = true; 5901 5902 ieee80211_queue_work(&local->hw, &sdata->work); 5903 } 5904 5905 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 5906 { 5907 struct ieee80211_local *local = sdata->local; 5908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5909 5910 sdata_lock(sdata); 5911 5912 if (ifmgd->status_received) { 5913 __le16 fc = ifmgd->status_fc; 5914 bool status_acked = ifmgd->status_acked; 5915 5916 ifmgd->status_received = false; 5917 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 5918 if (status_acked) { 5919 if (ifmgd->auth_data->algorithm == 5920 WLAN_AUTH_SAE) 5921 ifmgd->auth_data->timeout = 5922 jiffies + 5923 IEEE80211_AUTH_TIMEOUT_SAE; 5924 else 5925 ifmgd->auth_data->timeout = 5926 jiffies + 5927 IEEE80211_AUTH_TIMEOUT_SHORT; 5928 run_again(sdata, ifmgd->auth_data->timeout); 5929 } else { 5930 ifmgd->auth_data->timeout = jiffies - 1; 5931 } 5932 ifmgd->auth_data->timeout_started = true; 5933 } else if (ifmgd->assoc_data && 5934 (ieee80211_is_assoc_req(fc) || 5935 ieee80211_is_reassoc_req(fc))) { 5936 if (status_acked) { 5937 ifmgd->assoc_data->timeout = 5938 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 5939 run_again(sdata, ifmgd->assoc_data->timeout); 5940 } else { 5941 ifmgd->assoc_data->timeout = jiffies - 1; 5942 } 5943 ifmgd->assoc_data->timeout_started = true; 5944 } 5945 } 5946 5947 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 5948 time_after(jiffies, ifmgd->auth_data->timeout)) { 5949 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 5950 /* 5951 * ok ... we waited for assoc or continuation but 5952 * userspace didn't do it, so kill the auth data 5953 */ 5954 ieee80211_destroy_auth_data(sdata, false); 5955 } else if (ieee80211_auth(sdata)) { 5956 u8 ap_addr[ETH_ALEN]; 5957 struct ieee80211_event event = { 5958 .type = MLME_EVENT, 5959 .u.mlme.data = AUTH_EVENT, 5960 .u.mlme.status = MLME_TIMEOUT, 5961 }; 5962 5963 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 5964 5965 ieee80211_destroy_auth_data(sdata, false); 5966 5967 cfg80211_auth_timeout(sdata->dev, ap_addr); 5968 drv_event_callback(sdata->local, sdata, &event); 5969 } 5970 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 5971 run_again(sdata, ifmgd->auth_data->timeout); 5972 5973 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 5974 time_after(jiffies, ifmgd->assoc_data->timeout)) { 5975 if ((ifmgd->assoc_data->need_beacon && 5976 !sdata->deflink.u.mgd.have_beacon) || 5977 ieee80211_do_assoc(sdata)) { 5978 struct ieee80211_event event = { 5979 .type = MLME_EVENT, 5980 .u.mlme.data = ASSOC_EVENT, 5981 .u.mlme.status = MLME_TIMEOUT, 5982 }; 5983 5984 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5985 drv_event_callback(sdata->local, sdata, &event); 5986 } 5987 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 5988 run_again(sdata, ifmgd->assoc_data->timeout); 5989 5990 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 5991 ifmgd->associated) { 5992 u8 *bssid = sdata->deflink.u.mgd.bssid; 5993 int max_tries; 5994 5995 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5996 max_tries = max_nullfunc_tries; 5997 else 5998 max_tries = max_probe_tries; 5999 6000 /* ACK received for nullfunc probing frame */ 6001 if (!ifmgd->probe_send_count) 6002 ieee80211_reset_ap_probe(sdata); 6003 else if (ifmgd->nullfunc_failed) { 6004 if (ifmgd->probe_send_count < max_tries) { 6005 mlme_dbg(sdata, 6006 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6007 bssid, ifmgd->probe_send_count, 6008 max_tries); 6009 ieee80211_mgd_probe_ap_send(sdata); 6010 } else { 6011 mlme_dbg(sdata, 6012 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6013 bssid); 6014 ieee80211_sta_connection_lost(sdata, 6015 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6016 false); 6017 } 6018 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6019 run_again(sdata, ifmgd->probe_timeout); 6020 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6021 mlme_dbg(sdata, 6022 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6023 bssid, probe_wait_ms); 6024 ieee80211_sta_connection_lost(sdata, 6025 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6026 } else if (ifmgd->probe_send_count < max_tries) { 6027 mlme_dbg(sdata, 6028 "No probe response from AP %pM after %dms, try %d/%i\n", 6029 bssid, probe_wait_ms, 6030 ifmgd->probe_send_count, max_tries); 6031 ieee80211_mgd_probe_ap_send(sdata); 6032 } else { 6033 /* 6034 * We actually lost the connection ... or did we? 6035 * Let's make sure! 6036 */ 6037 mlme_dbg(sdata, 6038 "No probe response from AP %pM after %dms, disconnecting.\n", 6039 bssid, probe_wait_ms); 6040 6041 ieee80211_sta_connection_lost(sdata, 6042 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6043 } 6044 } 6045 6046 sdata_unlock(sdata); 6047 } 6048 6049 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6050 { 6051 struct ieee80211_sub_if_data *sdata = 6052 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6053 6054 if (WARN_ON(sdata->vif.valid_links)) 6055 return; 6056 6057 if (sdata->vif.bss_conf.csa_active && 6058 !sdata->deflink.u.mgd.csa_waiting_bcn) 6059 return; 6060 6061 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6062 return; 6063 6064 sdata->u.mgd.connection_loss = false; 6065 ieee80211_queue_work(&sdata->local->hw, 6066 &sdata->u.mgd.beacon_connection_loss_work); 6067 } 6068 6069 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6070 { 6071 struct ieee80211_sub_if_data *sdata = 6072 from_timer(sdata, t, u.mgd.conn_mon_timer); 6073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6074 struct ieee80211_local *local = sdata->local; 6075 struct sta_info *sta; 6076 unsigned long timeout; 6077 6078 if (WARN_ON(sdata->vif.valid_links)) 6079 return; 6080 6081 if (sdata->vif.bss_conf.csa_active && 6082 !sdata->deflink.u.mgd.csa_waiting_bcn) 6083 return; 6084 6085 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6086 if (!sta) 6087 return; 6088 6089 timeout = sta->deflink.status_stats.last_ack; 6090 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6091 timeout = sta->deflink.rx_stats.last_rx; 6092 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6093 6094 /* If timeout is after now, then update timer to fire at 6095 * the later date, but do not actually probe at this time. 6096 */ 6097 if (time_is_after_jiffies(timeout)) { 6098 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6099 return; 6100 } 6101 6102 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6103 } 6104 6105 static void ieee80211_sta_monitor_work(struct work_struct *work) 6106 { 6107 struct ieee80211_sub_if_data *sdata = 6108 container_of(work, struct ieee80211_sub_if_data, 6109 u.mgd.monitor_work); 6110 6111 ieee80211_mgd_probe_ap(sdata, false); 6112 } 6113 6114 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6115 { 6116 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6117 __ieee80211_stop_poll(sdata); 6118 6119 /* let's probe the connection once */ 6120 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6121 ieee80211_queue_work(&sdata->local->hw, 6122 &sdata->u.mgd.monitor_work); 6123 } 6124 } 6125 6126 #ifdef CONFIG_PM 6127 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6128 { 6129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6130 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6131 6132 sdata_lock(sdata); 6133 6134 if (ifmgd->auth_data || ifmgd->assoc_data) { 6135 const u8 *ap_addr = ifmgd->auth_data ? 6136 ifmgd->auth_data->ap_addr : 6137 ifmgd->assoc_data->ap_addr; 6138 6139 /* 6140 * If we are trying to authenticate / associate while suspending, 6141 * cfg80211 won't know and won't actually abort those attempts, 6142 * thus we need to do that ourselves. 6143 */ 6144 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6145 IEEE80211_STYPE_DEAUTH, 6146 WLAN_REASON_DEAUTH_LEAVING, 6147 false, frame_buf); 6148 if (ifmgd->assoc_data) 6149 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6150 if (ifmgd->auth_data) 6151 ieee80211_destroy_auth_data(sdata, false); 6152 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6153 IEEE80211_DEAUTH_FRAME_LEN, 6154 false); 6155 } 6156 6157 /* This is a bit of a hack - we should find a better and more generic 6158 * solution to this. Normally when suspending, cfg80211 will in fact 6159 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6160 * auth (not so important) or assoc (this is the problem) process. 6161 * 6162 * As a consequence, it can happen that we are in the process of both 6163 * associating and suspending, and receive an association response 6164 * after cfg80211 has checked if it needs to disconnect, but before 6165 * we actually set the flag to drop incoming frames. This will then 6166 * cause the workqueue flush to process the association response in 6167 * the suspend, resulting in a successful association just before it 6168 * tries to remove the interface from the driver, which now though 6169 * has a channel context assigned ... this results in issues. 6170 * 6171 * To work around this (for now) simply deauth here again if we're 6172 * now connected. 6173 */ 6174 if (ifmgd->associated && !sdata->local->wowlan) { 6175 u8 bssid[ETH_ALEN]; 6176 struct cfg80211_deauth_request req = { 6177 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6178 .bssid = bssid, 6179 }; 6180 6181 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6182 ieee80211_mgd_deauth(sdata, &req); 6183 } 6184 6185 sdata_unlock(sdata); 6186 } 6187 #endif 6188 6189 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6190 { 6191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6192 6193 sdata_lock(sdata); 6194 if (!ifmgd->associated) { 6195 sdata_unlock(sdata); 6196 return; 6197 } 6198 6199 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6200 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6201 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6202 ieee80211_sta_connection_lost(sdata, 6203 WLAN_REASON_UNSPECIFIED, 6204 true); 6205 sdata_unlock(sdata); 6206 return; 6207 } 6208 6209 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6210 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6211 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6212 ieee80211_sta_connection_lost(sdata, 6213 WLAN_REASON_UNSPECIFIED, 6214 true); 6215 sdata_unlock(sdata); 6216 return; 6217 } 6218 6219 sdata_unlock(sdata); 6220 } 6221 6222 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6223 { 6224 struct ieee80211_link_data *link = 6225 container_of(work, struct ieee80211_link_data, 6226 u.mgd.request_smps_work); 6227 6228 sdata_lock(link->sdata); 6229 __ieee80211_request_smps_mgd(link->sdata, link, 6230 link->u.mgd.driver_smps_mode); 6231 sdata_unlock(link->sdata); 6232 } 6233 6234 /* interface setup */ 6235 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6236 { 6237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6238 6239 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6240 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6241 ieee80211_beacon_connection_loss_work); 6242 INIT_WORK(&ifmgd->csa_connection_drop_work, 6243 ieee80211_csa_connection_drop_work); 6244 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6245 ieee80211_tdls_peer_del_work); 6246 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6247 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6248 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6249 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6250 ieee80211_sta_handle_tspec_ac_params_wk); 6251 6252 ifmgd->flags = 0; 6253 ifmgd->powersave = sdata->wdev.ps; 6254 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6255 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6256 /* Setup TDLS data */ 6257 spin_lock_init(&ifmgd->teardown_lock); 6258 ifmgd->teardown_skb = NULL; 6259 ifmgd->orig_teardown_skb = NULL; 6260 } 6261 6262 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6263 { 6264 struct ieee80211_sub_if_data *sdata = link->sdata; 6265 struct ieee80211_local *local = sdata->local; 6266 unsigned int link_id = link->link_id; 6267 6268 link->u.mgd.p2p_noa_index = -1; 6269 link->u.mgd.conn_flags = 0; 6270 link->conf->bssid = link->u.mgd.bssid; 6271 6272 INIT_WORK(&link->u.mgd.request_smps_work, 6273 ieee80211_request_smps_mgd_work); 6274 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6275 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6276 else 6277 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6278 6279 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6280 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6281 6282 if (sdata->u.mgd.assoc_data) 6283 ether_addr_copy(link->conf->addr, 6284 sdata->u.mgd.assoc_data->link[link_id].addr); 6285 } 6286 6287 /* scan finished notification */ 6288 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6289 { 6290 struct ieee80211_sub_if_data *sdata; 6291 6292 /* Restart STA timers */ 6293 rcu_read_lock(); 6294 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6295 if (ieee80211_sdata_running(sdata)) 6296 ieee80211_restart_sta_timer(sdata); 6297 } 6298 rcu_read_unlock(); 6299 } 6300 6301 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6302 u8 *dtim_count, u8 *dtim_period) 6303 { 6304 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6305 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6306 ies->len); 6307 const struct ieee80211_tim_ie *tim = NULL; 6308 const struct ieee80211_bssid_index *idx; 6309 bool valid = tim_ie && tim_ie[1] >= 2; 6310 6311 if (valid) 6312 tim = (void *)(tim_ie + 2); 6313 6314 if (dtim_count) 6315 *dtim_count = valid ? tim->dtim_count : 0; 6316 6317 if (dtim_period) 6318 *dtim_period = valid ? tim->dtim_period : 0; 6319 6320 /* Check if value is overridden by non-transmitted profile */ 6321 if (!idx_ie || idx_ie[1] < 3) 6322 return valid; 6323 6324 idx = (void *)(idx_ie + 2); 6325 6326 if (dtim_count) 6327 *dtim_count = idx->dtim_count; 6328 6329 if (dtim_period) 6330 *dtim_period = idx->dtim_period; 6331 6332 return true; 6333 } 6334 6335 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6336 struct cfg80211_bss *cbss, s8 link_id, 6337 const u8 *ap_mld_addr, bool assoc, 6338 bool override) 6339 { 6340 struct ieee80211_local *local = sdata->local; 6341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6342 struct ieee80211_bss *bss = (void *)cbss->priv; 6343 struct sta_info *new_sta = NULL; 6344 struct ieee80211_link_data *link; 6345 bool have_sta = false; 6346 bool mlo; 6347 int err; 6348 6349 if (link_id >= 0) { 6350 mlo = true; 6351 if (WARN_ON(!ap_mld_addr)) 6352 return -EINVAL; 6353 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6354 } else { 6355 if (WARN_ON(ap_mld_addr)) 6356 return -EINVAL; 6357 ap_mld_addr = cbss->bssid; 6358 err = ieee80211_vif_set_links(sdata, 0); 6359 link_id = 0; 6360 mlo = false; 6361 } 6362 6363 if (err) 6364 return err; 6365 6366 link = sdata_dereference(sdata->link[link_id], sdata); 6367 if (WARN_ON(!link)) { 6368 err = -ENOLINK; 6369 goto out_err; 6370 } 6371 6372 if (mlo && !is_valid_ether_addr(link->conf->addr)) 6373 eth_random_addr(link->conf->addr); 6374 6375 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6376 err = -EINVAL; 6377 goto out_err; 6378 } 6379 6380 /* If a reconfig is happening, bail out */ 6381 if (local->in_reconfig) { 6382 err = -EBUSY; 6383 goto out_err; 6384 } 6385 6386 if (assoc) { 6387 rcu_read_lock(); 6388 have_sta = sta_info_get(sdata, ap_mld_addr); 6389 rcu_read_unlock(); 6390 } 6391 6392 if (!have_sta) { 6393 if (mlo) 6394 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6395 link_id, cbss->bssid, 6396 GFP_KERNEL); 6397 else 6398 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6399 6400 if (!new_sta) { 6401 err = -ENOMEM; 6402 goto out_err; 6403 } 6404 6405 new_sta->sta.mlo = mlo; 6406 } 6407 6408 /* 6409 * Set up the information for the new channel before setting the 6410 * new channel. We can't - completely race-free - change the basic 6411 * rates bitmap and the channel (sband) that it refers to, but if 6412 * we set it up before we at least avoid calling into the driver's 6413 * bss_info_changed() method with invalid information (since we do 6414 * call that from changing the channel - only for IDLE and perhaps 6415 * some others, but ...). 6416 * 6417 * So to avoid that, just set up all the new information before the 6418 * channel, but tell the driver to apply it only afterwards, since 6419 * it might need the new channel for that. 6420 */ 6421 if (new_sta) { 6422 const struct cfg80211_bss_ies *ies; 6423 struct link_sta_info *link_sta; 6424 6425 rcu_read_lock(); 6426 link_sta = rcu_dereference(new_sta->link[link_id]); 6427 if (WARN_ON(!link_sta)) { 6428 rcu_read_unlock(); 6429 sta_info_free(local, new_sta); 6430 err = -EINVAL; 6431 goto out_err; 6432 } 6433 6434 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6435 link_sta, cbss); 6436 if (err) { 6437 rcu_read_unlock(); 6438 sta_info_free(local, new_sta); 6439 goto out_err; 6440 } 6441 6442 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6443 6444 /* set timing information */ 6445 link->conf->beacon_int = cbss->beacon_interval; 6446 ies = rcu_dereference(cbss->beacon_ies); 6447 if (ies) { 6448 link->conf->sync_tsf = ies->tsf; 6449 link->conf->sync_device_ts = 6450 bss->device_ts_beacon; 6451 6452 ieee80211_get_dtim(ies, 6453 &link->conf->sync_dtim_count, 6454 NULL); 6455 } else if (!ieee80211_hw_check(&sdata->local->hw, 6456 TIMING_BEACON_ONLY)) { 6457 ies = rcu_dereference(cbss->proberesp_ies); 6458 /* must be non-NULL since beacon IEs were NULL */ 6459 link->conf->sync_tsf = ies->tsf; 6460 link->conf->sync_device_ts = 6461 bss->device_ts_presp; 6462 link->conf->sync_dtim_count = 0; 6463 } else { 6464 link->conf->sync_tsf = 0; 6465 link->conf->sync_device_ts = 0; 6466 link->conf->sync_dtim_count = 0; 6467 } 6468 rcu_read_unlock(); 6469 } 6470 6471 if (new_sta || override) { 6472 err = ieee80211_prep_channel(sdata, link, cbss, 6473 &link->u.mgd.conn_flags); 6474 if (err) { 6475 if (new_sta) 6476 sta_info_free(local, new_sta); 6477 goto out_err; 6478 } 6479 } 6480 6481 if (new_sta) { 6482 /* 6483 * tell driver about BSSID, basic rates and timing 6484 * this was set up above, before setting the channel 6485 */ 6486 ieee80211_link_info_change_notify(sdata, link, 6487 BSS_CHANGED_BSSID | 6488 BSS_CHANGED_BASIC_RATES | 6489 BSS_CHANGED_BEACON_INT); 6490 6491 if (assoc) 6492 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6493 6494 err = sta_info_insert(new_sta); 6495 new_sta = NULL; 6496 if (err) { 6497 sdata_info(sdata, 6498 "failed to insert STA entry for the AP (error %d)\n", 6499 err); 6500 goto out_err; 6501 } 6502 } else 6503 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6504 6505 /* Cancel scan to ensure that nothing interferes with connection */ 6506 if (local->scanning) 6507 ieee80211_scan_cancel(local); 6508 6509 return 0; 6510 6511 out_err: 6512 ieee80211_vif_set_links(sdata, 0); 6513 return err; 6514 } 6515 6516 /* config hooks */ 6517 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6518 struct cfg80211_auth_request *req) 6519 { 6520 struct ieee80211_local *local = sdata->local; 6521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6522 struct ieee80211_mgd_auth_data *auth_data; 6523 u16 auth_alg; 6524 int err; 6525 bool cont_auth; 6526 6527 /* prepare auth data structure */ 6528 6529 switch (req->auth_type) { 6530 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6531 auth_alg = WLAN_AUTH_OPEN; 6532 break; 6533 case NL80211_AUTHTYPE_SHARED_KEY: 6534 if (fips_enabled) 6535 return -EOPNOTSUPP; 6536 auth_alg = WLAN_AUTH_SHARED_KEY; 6537 break; 6538 case NL80211_AUTHTYPE_FT: 6539 auth_alg = WLAN_AUTH_FT; 6540 break; 6541 case NL80211_AUTHTYPE_NETWORK_EAP: 6542 auth_alg = WLAN_AUTH_LEAP; 6543 break; 6544 case NL80211_AUTHTYPE_SAE: 6545 auth_alg = WLAN_AUTH_SAE; 6546 break; 6547 case NL80211_AUTHTYPE_FILS_SK: 6548 auth_alg = WLAN_AUTH_FILS_SK; 6549 break; 6550 case NL80211_AUTHTYPE_FILS_SK_PFS: 6551 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6552 break; 6553 case NL80211_AUTHTYPE_FILS_PK: 6554 auth_alg = WLAN_AUTH_FILS_PK; 6555 break; 6556 default: 6557 return -EOPNOTSUPP; 6558 } 6559 6560 if (ifmgd->assoc_data) 6561 return -EBUSY; 6562 6563 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6564 req->ie_len, GFP_KERNEL); 6565 if (!auth_data) 6566 return -ENOMEM; 6567 6568 memcpy(auth_data->ap_addr, 6569 req->ap_mld_addr ?: req->bss->bssid, 6570 ETH_ALEN); 6571 auth_data->bss = req->bss; 6572 6573 if (req->auth_data_len >= 4) { 6574 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6575 __le16 *pos = (__le16 *) req->auth_data; 6576 6577 auth_data->sae_trans = le16_to_cpu(pos[0]); 6578 auth_data->sae_status = le16_to_cpu(pos[1]); 6579 } 6580 memcpy(auth_data->data, req->auth_data + 4, 6581 req->auth_data_len - 4); 6582 auth_data->data_len += req->auth_data_len - 4; 6583 } 6584 6585 /* Check if continuing authentication or trying to authenticate with the 6586 * same BSS that we were in the process of authenticating with and avoid 6587 * removal and re-addition of the STA entry in 6588 * ieee80211_prep_connection(). 6589 */ 6590 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 6591 6592 if (req->ie && req->ie_len) { 6593 memcpy(&auth_data->data[auth_data->data_len], 6594 req->ie, req->ie_len); 6595 auth_data->data_len += req->ie_len; 6596 } 6597 6598 if (req->key && req->key_len) { 6599 auth_data->key_len = req->key_len; 6600 auth_data->key_idx = req->key_idx; 6601 memcpy(auth_data->key, req->key, req->key_len); 6602 } 6603 6604 auth_data->algorithm = auth_alg; 6605 6606 /* try to authenticate/probe */ 6607 6608 if (ifmgd->auth_data) { 6609 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6610 auth_data->peer_confirmed = 6611 ifmgd->auth_data->peer_confirmed; 6612 } 6613 ieee80211_destroy_auth_data(sdata, cont_auth); 6614 } 6615 6616 /* prep auth_data so we don't go into idle on disassoc */ 6617 ifmgd->auth_data = auth_data; 6618 6619 /* If this is continuation of an ongoing SAE authentication exchange 6620 * (i.e., request to send SAE Confirm) and the peer has already 6621 * confirmed, mark authentication completed since we are about to send 6622 * out SAE Confirm. 6623 */ 6624 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6625 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6626 ieee80211_mark_sta_auth(sdata); 6627 6628 if (ifmgd->associated) { 6629 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6630 6631 sdata_info(sdata, 6632 "disconnect from AP %pM for new auth to %pM\n", 6633 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6634 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6635 WLAN_REASON_UNSPECIFIED, 6636 false, frame_buf); 6637 6638 ieee80211_report_disconnect(sdata, frame_buf, 6639 sizeof(frame_buf), true, 6640 WLAN_REASON_UNSPECIFIED, 6641 false); 6642 } 6643 6644 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6645 6646 /* needed for transmitting the auth frame(s) properly */ 6647 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6648 6649 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6650 req->ap_mld_addr, cont_auth, false); 6651 if (err) 6652 goto err_clear; 6653 6654 err = ieee80211_auth(sdata); 6655 if (err) { 6656 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6657 goto err_clear; 6658 } 6659 6660 /* hold our own reference */ 6661 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6662 return 0; 6663 6664 err_clear: 6665 if (!sdata->vif.valid_links) { 6666 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6667 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6668 BSS_CHANGED_BSSID); 6669 mutex_lock(&sdata->local->mtx); 6670 ieee80211_link_release_channel(&sdata->deflink); 6671 mutex_unlock(&sdata->local->mtx); 6672 } 6673 ifmgd->auth_data = NULL; 6674 kfree(auth_data); 6675 return err; 6676 } 6677 6678 static ieee80211_conn_flags_t 6679 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6680 struct ieee80211_mgd_assoc_data *assoc_data, 6681 struct cfg80211_assoc_request *req, 6682 ieee80211_conn_flags_t conn_flags, 6683 unsigned int link_id) 6684 { 6685 struct ieee80211_local *local = sdata->local; 6686 const struct cfg80211_bss_ies *beacon_ies; 6687 struct ieee80211_supported_band *sband; 6688 const struct element *ht_elem, *vht_elem; 6689 struct ieee80211_link_data *link; 6690 struct cfg80211_bss *cbss; 6691 struct ieee80211_bss *bss; 6692 bool is_5ghz, is_6ghz; 6693 6694 cbss = assoc_data->link[link_id].bss; 6695 if (WARN_ON(!cbss)) 6696 return 0; 6697 6698 bss = (void *)cbss->priv; 6699 6700 sband = local->hw.wiphy->bands[cbss->channel->band]; 6701 if (WARN_ON(!sband)) 6702 return 0; 6703 6704 link = sdata_dereference(sdata->link[link_id], sdata); 6705 if (WARN_ON(!link)) 6706 return 0; 6707 6708 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6709 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6710 6711 /* for MLO connections assume advertising all rates is OK */ 6712 if (!req->ap_mld_addr) { 6713 assoc_data->supp_rates = bss->supp_rates; 6714 assoc_data->supp_rates_len = bss->supp_rates_len; 6715 } 6716 6717 /* copy and link elems for the STA profile */ 6718 if (req->links[link_id].elems_len) { 6719 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6720 req->links[link_id].elems_len); 6721 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6722 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6723 assoc_data->ie_pos += req->links[link_id].elems_len; 6724 } 6725 6726 rcu_read_lock(); 6727 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 6728 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6729 assoc_data->link[link_id].ap_ht_param = 6730 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6731 else if (!is_6ghz) 6732 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6733 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 6734 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6735 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 6736 sizeof(struct ieee80211_vht_cap)); 6737 } else if (is_5ghz) { 6738 link_info(link, 6739 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6740 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 6741 IEEE80211_CONN_DISABLE_HE | 6742 IEEE80211_CONN_DISABLE_EHT; 6743 } 6744 rcu_read_unlock(); 6745 6746 link->u.mgd.beacon_crc_valid = false; 6747 link->u.mgd.dtim_period = 0; 6748 link->u.mgd.have_beacon = false; 6749 6750 /* override HT/VHT configuration only if the AP and we support it */ 6751 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 6752 struct ieee80211_sta_ht_cap sta_ht_cap; 6753 6754 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6755 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6756 } 6757 6758 rcu_read_lock(); 6759 beacon_ies = rcu_dereference(cbss->beacon_ies); 6760 if (beacon_ies) { 6761 const struct element *elem; 6762 u8 dtim_count = 0; 6763 6764 ieee80211_get_dtim(beacon_ies, &dtim_count, 6765 &link->u.mgd.dtim_period); 6766 6767 sdata->deflink.u.mgd.have_beacon = true; 6768 6769 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6770 link->conf->sync_tsf = beacon_ies->tsf; 6771 link->conf->sync_device_ts = bss->device_ts_beacon; 6772 link->conf->sync_dtim_count = dtim_count; 6773 } 6774 6775 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6776 beacon_ies->data, beacon_ies->len); 6777 if (elem && elem->datalen >= 3) 6778 link->conf->profile_periodicity = elem->data[2]; 6779 else 6780 link->conf->profile_periodicity = 0; 6781 6782 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6783 beacon_ies->data, beacon_ies->len); 6784 if (elem && elem->datalen >= 11 && 6785 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6786 link->conf->ema_ap = true; 6787 else 6788 link->conf->ema_ap = false; 6789 } 6790 rcu_read_unlock(); 6791 6792 if (bss->corrupt_data) { 6793 char *corrupt_type = "data"; 6794 6795 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6796 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6797 corrupt_type = "beacon and probe response"; 6798 else 6799 corrupt_type = "beacon"; 6800 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 6801 corrupt_type = "probe response"; 6802 } 6803 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 6804 cbss->bssid, corrupt_type); 6805 } 6806 6807 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 6808 if (sdata->u.mgd.powersave) 6809 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 6810 else 6811 link->smps_mode = IEEE80211_SMPS_OFF; 6812 } else { 6813 link->smps_mode = link->u.mgd.req_smps; 6814 } 6815 6816 return conn_flags; 6817 } 6818 6819 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 6820 struct cfg80211_assoc_request *req) 6821 { 6822 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 6823 struct ieee80211_local *local = sdata->local; 6824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6825 struct ieee80211_mgd_assoc_data *assoc_data; 6826 const struct element *ssid_elem; 6827 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6828 ieee80211_conn_flags_t conn_flags = 0; 6829 struct ieee80211_link_data *link; 6830 struct cfg80211_bss *cbss; 6831 struct ieee80211_bss *bss; 6832 bool override; 6833 int i, err; 6834 size_t size = sizeof(*assoc_data) + req->ie_len; 6835 6836 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 6837 size += req->links[i].elems_len; 6838 6839 if (req->ap_mld_addr) { 6840 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 6841 if (!req->links[i].bss) 6842 continue; 6843 if (i == assoc_link_id) 6844 continue; 6845 /* 6846 * For now, support only a single link in MLO, we 6847 * don't have the necessary parsing of the multi- 6848 * link element in the association response, etc. 6849 */ 6850 sdata_info(sdata, 6851 "refusing MLO association with >1 links\n"); 6852 return -EINVAL; 6853 } 6854 } 6855 6856 assoc_data = kzalloc(size, GFP_KERNEL); 6857 if (!assoc_data) 6858 return -ENOMEM; 6859 6860 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 6861 6862 rcu_read_lock(); 6863 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 6864 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 6865 rcu_read_unlock(); 6866 kfree(assoc_data); 6867 return -EINVAL; 6868 } 6869 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 6870 assoc_data->ssid_len = ssid_elem->datalen; 6871 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 6872 vif_cfg->ssid_len = assoc_data->ssid_len; 6873 rcu_read_unlock(); 6874 6875 if (req->ap_mld_addr) { 6876 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 6877 if (!req->links[i].bss) 6878 continue; 6879 link = sdata_dereference(sdata->link[i], sdata); 6880 if (link) 6881 ether_addr_copy(assoc_data->link[i].addr, 6882 link->conf->addr); 6883 else 6884 eth_random_addr(assoc_data->link[i].addr); 6885 } 6886 } else { 6887 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 6888 } 6889 6890 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 6891 6892 memcpy(assoc_data->ap_addr, 6893 req->ap_mld_addr ?: req->bss->bssid, 6894 ETH_ALEN); 6895 6896 if (ifmgd->associated) { 6897 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6898 6899 sdata_info(sdata, 6900 "disconnect from AP %pM for new assoc to %pM\n", 6901 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 6902 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6903 WLAN_REASON_UNSPECIFIED, 6904 false, frame_buf); 6905 6906 ieee80211_report_disconnect(sdata, frame_buf, 6907 sizeof(frame_buf), true, 6908 WLAN_REASON_UNSPECIFIED, 6909 false); 6910 } 6911 6912 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 6913 err = -EBUSY; 6914 goto err_free; 6915 } 6916 6917 if (ifmgd->assoc_data) { 6918 err = -EBUSY; 6919 goto err_free; 6920 } 6921 6922 if (ifmgd->auth_data) { 6923 bool match; 6924 6925 /* keep sta info, bssid if matching */ 6926 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 6927 assoc_data->ap_addr); 6928 ieee80211_destroy_auth_data(sdata, match); 6929 } 6930 6931 /* prepare assoc data */ 6932 6933 bss = (void *)cbss->priv; 6934 assoc_data->wmm = bss->wmm_used && 6935 (local->hw.queues >= IEEE80211_NUM_ACS); 6936 6937 /* 6938 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 6939 * We still associate in non-HT mode (11a/b/g) if any one of these 6940 * ciphers is configured as pairwise. 6941 * We can set this to true for non-11n hardware, that'll be checked 6942 * separately along with the peer capabilities. 6943 */ 6944 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 6945 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6946 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6947 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6948 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6949 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 6950 conn_flags |= IEEE80211_CONN_DISABLE_HE; 6951 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 6952 netdev_info(sdata->dev, 6953 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 6954 } 6955 } 6956 6957 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 6958 if (!bss->wmm_used) { 6959 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6960 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 6961 conn_flags |= IEEE80211_CONN_DISABLE_HE; 6962 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 6963 netdev_info(sdata->dev, 6964 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 6965 } 6966 6967 if (req->flags & ASSOC_REQ_DISABLE_HT) { 6968 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 6969 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6970 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 6971 conn_flags |= IEEE80211_CONN_DISABLE_HE; 6972 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 6973 } 6974 6975 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 6976 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 6977 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 6978 } 6979 6980 if (req->flags & ASSOC_REQ_DISABLE_HE) { 6981 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 6982 conn_flags |= IEEE80211_CONN_DISABLE_HE; 6983 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 6984 } 6985 6986 if (req->flags & ASSOC_REQ_DISABLE_EHT) 6987 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 6988 6989 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 6990 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 6991 sizeof(ifmgd->ht_capa_mask)); 6992 6993 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 6994 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 6995 sizeof(ifmgd->vht_capa_mask)); 6996 6997 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 6998 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 6999 sizeof(ifmgd->s1g_capa_mask)); 7000 7001 if (req->ie && req->ie_len) { 7002 memcpy(assoc_data->ie, req->ie, req->ie_len); 7003 assoc_data->ie_len = req->ie_len; 7004 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7005 } else { 7006 assoc_data->ie_pos = assoc_data->ie; 7007 } 7008 7009 if (req->fils_kek) { 7010 /* should already be checked in cfg80211 - so warn */ 7011 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7012 err = -EINVAL; 7013 goto err_free; 7014 } 7015 memcpy(assoc_data->fils_kek, req->fils_kek, 7016 req->fils_kek_len); 7017 assoc_data->fils_kek_len = req->fils_kek_len; 7018 } 7019 7020 if (req->fils_nonces) 7021 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7022 2 * FILS_NONCE_LEN); 7023 7024 /* default timeout */ 7025 assoc_data->timeout = jiffies; 7026 assoc_data->timeout_started = true; 7027 7028 assoc_data->assoc_link_id = assoc_link_id; 7029 7030 if (req->ap_mld_addr) { 7031 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7032 assoc_data->link[i].conn_flags = conn_flags; 7033 assoc_data->link[i].bss = req->links[i].bss; 7034 } 7035 7036 /* if there was no authentication, set up the link */ 7037 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7038 if (err) 7039 goto err_clear; 7040 } else { 7041 assoc_data->link[0].conn_flags = conn_flags; 7042 assoc_data->link[0].bss = cbss; 7043 } 7044 7045 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7046 if (WARN_ON(!link)) { 7047 err = -EINVAL; 7048 goto err_clear; 7049 } 7050 7051 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7052 conn_flags |= link->u.mgd.conn_flags; 7053 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7054 conn_flags, assoc_link_id); 7055 override = link->u.mgd.conn_flags != conn_flags; 7056 link->u.mgd.conn_flags |= conn_flags; 7057 7058 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7059 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7060 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7061 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7062 7063 if (bss->wmm_used && bss->uapsd_supported && 7064 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7065 assoc_data->uapsd = true; 7066 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7067 } else { 7068 assoc_data->uapsd = false; 7069 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7070 } 7071 7072 if (req->prev_bssid) 7073 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7074 7075 if (req->use_mfp) { 7076 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7077 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7078 } else { 7079 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7080 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7081 } 7082 7083 if (req->flags & ASSOC_REQ_USE_RRM) 7084 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7085 else 7086 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7087 7088 if (req->crypto.control_port) 7089 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7090 else 7091 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7092 7093 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7094 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7095 sdata->control_port_over_nl80211 = 7096 req->crypto.control_port_over_nl80211; 7097 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7098 7099 /* kick off associate process */ 7100 ifmgd->assoc_data = assoc_data; 7101 7102 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7103 if (!assoc_data->link[i].bss) 7104 continue; 7105 if (i == assoc_data->assoc_link_id) 7106 continue; 7107 /* only calculate the flags, hence link == NULL */ 7108 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7109 &assoc_data->link[i].conn_flags); 7110 if (err) 7111 goto err_clear; 7112 } 7113 7114 /* needed for transmitting the assoc frames properly */ 7115 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7116 7117 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7118 req->ap_mld_addr, true, override); 7119 if (err) 7120 goto err_clear; 7121 7122 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7123 link->u.mgd.conn_flags; 7124 7125 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7126 const struct cfg80211_bss_ies *beacon_ies; 7127 7128 rcu_read_lock(); 7129 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7130 7131 if (beacon_ies) { 7132 /* 7133 * Wait up to one beacon interval ... 7134 * should this be more if we miss one? 7135 */ 7136 sdata_info(sdata, "waiting for beacon from %pM\n", 7137 link->u.mgd.bssid); 7138 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7139 assoc_data->timeout_started = true; 7140 assoc_data->need_beacon = true; 7141 } 7142 rcu_read_unlock(); 7143 } 7144 7145 run_again(sdata, assoc_data->timeout); 7146 7147 return 0; 7148 err_clear: 7149 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7150 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7151 BSS_CHANGED_BSSID); 7152 ifmgd->assoc_data = NULL; 7153 err_free: 7154 kfree(assoc_data); 7155 return err; 7156 } 7157 7158 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7159 struct cfg80211_deauth_request *req) 7160 { 7161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7162 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7163 bool tx = !req->local_state_change; 7164 struct ieee80211_prep_tx_info info = { 7165 .subtype = IEEE80211_STYPE_DEAUTH, 7166 }; 7167 7168 if (ifmgd->auth_data && 7169 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7170 sdata_info(sdata, 7171 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7172 req->bssid, req->reason_code, 7173 ieee80211_get_reason_code_string(req->reason_code)); 7174 7175 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7176 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7177 IEEE80211_STYPE_DEAUTH, 7178 req->reason_code, tx, 7179 frame_buf); 7180 ieee80211_destroy_auth_data(sdata, false); 7181 ieee80211_report_disconnect(sdata, frame_buf, 7182 sizeof(frame_buf), true, 7183 req->reason_code, false); 7184 drv_mgd_complete_tx(sdata->local, sdata, &info); 7185 return 0; 7186 } 7187 7188 if (ifmgd->assoc_data && 7189 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7190 sdata_info(sdata, 7191 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7192 req->bssid, req->reason_code, 7193 ieee80211_get_reason_code_string(req->reason_code)); 7194 7195 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7196 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7197 IEEE80211_STYPE_DEAUTH, 7198 req->reason_code, tx, 7199 frame_buf); 7200 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7201 ieee80211_report_disconnect(sdata, frame_buf, 7202 sizeof(frame_buf), true, 7203 req->reason_code, false); 7204 return 0; 7205 } 7206 7207 if (ifmgd->associated && 7208 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7209 sdata_info(sdata, 7210 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7211 req->bssid, req->reason_code, 7212 ieee80211_get_reason_code_string(req->reason_code)); 7213 7214 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7215 req->reason_code, tx, frame_buf); 7216 ieee80211_report_disconnect(sdata, frame_buf, 7217 sizeof(frame_buf), true, 7218 req->reason_code, false); 7219 drv_mgd_complete_tx(sdata->local, sdata, &info); 7220 return 0; 7221 } 7222 7223 return -ENOTCONN; 7224 } 7225 7226 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7227 struct cfg80211_disassoc_request *req) 7228 { 7229 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7230 7231 if (!sdata->u.mgd.associated || 7232 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7233 return -ENOTCONN; 7234 7235 sdata_info(sdata, 7236 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7237 req->ap_addr, req->reason_code, 7238 ieee80211_get_reason_code_string(req->reason_code)); 7239 7240 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7241 req->reason_code, !req->local_state_change, 7242 frame_buf); 7243 7244 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7245 req->reason_code, false); 7246 7247 return 0; 7248 } 7249 7250 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7251 { 7252 cancel_work_sync(&link->u.mgd.request_smps_work); 7253 cancel_work_sync(&link->u.mgd.chswitch_work); 7254 } 7255 7256 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7257 { 7258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7259 7260 /* 7261 * Make sure some work items will not run after this, 7262 * they will not do anything but might not have been 7263 * cancelled when disconnecting. 7264 */ 7265 cancel_work_sync(&ifmgd->monitor_work); 7266 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7267 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7268 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7269 7270 sdata_lock(sdata); 7271 if (ifmgd->assoc_data) 7272 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7273 if (ifmgd->auth_data) 7274 ieee80211_destroy_auth_data(sdata, false); 7275 spin_lock_bh(&ifmgd->teardown_lock); 7276 if (ifmgd->teardown_skb) { 7277 kfree_skb(ifmgd->teardown_skb); 7278 ifmgd->teardown_skb = NULL; 7279 ifmgd->orig_teardown_skb = NULL; 7280 } 7281 kfree(ifmgd->assoc_req_ies); 7282 ifmgd->assoc_req_ies = NULL; 7283 ifmgd->assoc_req_ies_len = 0; 7284 spin_unlock_bh(&ifmgd->teardown_lock); 7285 del_timer_sync(&ifmgd->timer); 7286 sdata_unlock(sdata); 7287 } 7288 7289 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7290 enum nl80211_cqm_rssi_threshold_event rssi_event, 7291 s32 rssi_level, 7292 gfp_t gfp) 7293 { 7294 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7295 7296 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7297 7298 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7299 } 7300 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7301 7302 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7303 { 7304 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7305 7306 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7307 7308 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7309 } 7310 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7311 7312 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7313 int rssi_min_thold, 7314 int rssi_max_thold) 7315 { 7316 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7317 7318 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7319 return; 7320 7321 /* 7322 * Scale up threshold values before storing it, as the RSSI averaging 7323 * algorithm uses a scaled up value as well. Change this scaling 7324 * factor if the RSSI averaging algorithm changes. 7325 */ 7326 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7327 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7328 } 7329 7330 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7331 int rssi_min_thold, 7332 int rssi_max_thold) 7333 { 7334 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7335 7336 WARN_ON(rssi_min_thold == rssi_max_thold || 7337 rssi_min_thold > rssi_max_thold); 7338 7339 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7340 rssi_max_thold); 7341 } 7342 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7343 7344 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7345 { 7346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7347 7348 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7349 } 7350 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7351