1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2022 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * We can have multiple work items (and connection probing) 93 * scheduling this timer, but we need to take care to only 94 * reschedule it when it should fire _earlier_ than it was 95 * asked for before, or if it's not pending right now. This 96 * function ensures that. Note that it then is required to 97 * run this function for all timeouts after the first one 98 * has happened -- the work that runs from this timer will 99 * do that. 100 */ 101 static void run_again(struct ieee80211_sub_if_data *sdata, 102 unsigned long timeout) 103 { 104 sdata_assert_lock(sdata); 105 106 if (!timer_pending(&sdata->u.mgd.timer) || 107 time_before(timeout, sdata->u.mgd.timer.expires)) 108 mod_timer(&sdata->u.mgd.timer, timeout); 109 } 110 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 112 { 113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 114 return; 115 116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 117 return; 118 119 mod_timer(&sdata->u.mgd.bcn_mon_timer, 120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 121 } 122 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 124 { 125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 126 127 if (unlikely(!ifmgd->associated)) 128 return; 129 130 if (ifmgd->probe_send_count) 131 ifmgd->probe_send_count = 0; 132 133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 134 return; 135 136 mod_timer(&ifmgd->conn_mon_timer, 137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 138 } 139 140 static int ecw2cw(int ecw) 141 { 142 return (1 << ecw) - 1; 143 } 144 145 static ieee80211_conn_flags_t 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 147 struct ieee80211_link_data *link, 148 ieee80211_conn_flags_t conn_flags, 149 struct ieee80211_supported_band *sband, 150 struct ieee80211_channel *channel, 151 u32 vht_cap_info, 152 const struct ieee80211_ht_operation *ht_oper, 153 const struct ieee80211_vht_operation *vht_oper, 154 const struct ieee80211_he_operation *he_oper, 155 const struct ieee80211_eht_operation *eht_oper, 156 const struct ieee80211_s1g_oper_ie *s1g_oper, 157 struct cfg80211_chan_def *chandef, bool tracking) 158 { 159 struct cfg80211_chan_def vht_chandef; 160 struct ieee80211_sta_ht_cap sta_ht_cap; 161 ieee80211_conn_flags_t ret; 162 u32 ht_cfreq; 163 164 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 165 chandef->chan = channel; 166 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 167 chandef->center_freq1 = channel->center_freq; 168 chandef->freq1_offset = channel->freq_offset; 169 170 if (channel->band == NL80211_BAND_6GHZ) { 171 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 172 chandef)) { 173 mlme_dbg(sdata, 174 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 175 ret = IEEE80211_CONN_DISABLE_HT | 176 IEEE80211_CONN_DISABLE_VHT | 177 IEEE80211_CONN_DISABLE_HE | 178 IEEE80211_CONN_DISABLE_EHT; 179 } else { 180 ret = 0; 181 } 182 vht_chandef = *chandef; 183 goto out; 184 } else if (sband->band == NL80211_BAND_S1GHZ) { 185 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 186 sdata_info(sdata, 187 "Missing S1G Operation Element? Trying operating == primary\n"); 188 chandef->width = ieee80211_s1g_channel_width(channel); 189 } 190 191 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_40MHZ | 192 IEEE80211_CONN_DISABLE_VHT | 193 IEEE80211_CONN_DISABLE_80P80MHZ | 194 IEEE80211_CONN_DISABLE_160MHZ; 195 goto out; 196 } 197 198 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 199 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 200 201 if (!ht_oper || !sta_ht_cap.ht_supported) { 202 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 203 ret = IEEE80211_CONN_DISABLE_HT | 204 IEEE80211_CONN_DISABLE_VHT | 205 IEEE80211_CONN_DISABLE_HE | 206 IEEE80211_CONN_DISABLE_EHT; 207 goto out; 208 } 209 210 chandef->width = NL80211_CHAN_WIDTH_20; 211 212 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 213 channel->band); 214 /* check that channel matches the right operating channel */ 215 if (!tracking && channel->center_freq != ht_cfreq) { 216 /* 217 * It's possible that some APs are confused here; 218 * Netgear WNDR3700 sometimes reports 4 higher than 219 * the actual channel in association responses, but 220 * since we look at probe response/beacon data here 221 * it should be OK. 222 */ 223 sdata_info(sdata, 224 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 225 channel->center_freq, ht_cfreq, 226 ht_oper->primary_chan, channel->band); 227 ret = IEEE80211_CONN_DISABLE_HT | 228 IEEE80211_CONN_DISABLE_VHT | 229 IEEE80211_CONN_DISABLE_HE | 230 IEEE80211_CONN_DISABLE_EHT; 231 goto out; 232 } 233 234 /* check 40 MHz support, if we have it */ 235 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 236 ieee80211_chandef_ht_oper(ht_oper, chandef); 237 } else { 238 mlme_dbg(sdata, "40 MHz not supported\n"); 239 /* 40 MHz (and 80 MHz) must be supported for VHT */ 240 ret = IEEE80211_CONN_DISABLE_VHT; 241 /* also mark 40 MHz disabled */ 242 ret |= IEEE80211_CONN_DISABLE_40MHZ; 243 goto out; 244 } 245 246 if (!vht_oper || !sband->vht_cap.vht_supported) { 247 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 248 ret = IEEE80211_CONN_DISABLE_VHT; 249 goto out; 250 } 251 252 vht_chandef = *chandef; 253 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE) && 254 he_oper && 255 (le32_to_cpu(he_oper->he_oper_params) & 256 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 257 struct ieee80211_vht_operation he_oper_vht_cap; 258 259 /* 260 * Set only first 3 bytes (other 2 aren't used in 261 * ieee80211_chandef_vht_oper() anyway) 262 */ 263 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 264 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 265 266 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 267 &he_oper_vht_cap, ht_oper, 268 &vht_chandef)) { 269 if (!(conn_flags & IEEE80211_CONN_DISABLE_HE)) 270 sdata_info(sdata, 271 "HE AP VHT information is invalid, disabling HE\n"); 272 ret = IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 273 goto out; 274 } 275 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 276 vht_cap_info, 277 vht_oper, ht_oper, 278 &vht_chandef)) { 279 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 280 sdata_info(sdata, 281 "AP VHT information is invalid, disabling VHT\n"); 282 ret = IEEE80211_CONN_DISABLE_VHT; 283 goto out; 284 } 285 286 if (!cfg80211_chandef_valid(&vht_chandef)) { 287 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 288 sdata_info(sdata, 289 "AP VHT information is invalid, disabling VHT\n"); 290 ret = IEEE80211_CONN_DISABLE_VHT; 291 goto out; 292 } 293 294 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 295 ret = 0; 296 goto out; 297 } 298 299 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 300 if (!(conn_flags & IEEE80211_CONN_DISABLE_VHT)) 301 sdata_info(sdata, 302 "AP VHT information doesn't match HT, disabling VHT\n"); 303 ret = IEEE80211_CONN_DISABLE_VHT; 304 goto out; 305 } 306 307 *chandef = vht_chandef; 308 309 /* 310 * handle the case that the EHT operation indicates that it holds EHT 311 * operation information (in case that the channel width differs from 312 * the channel width reported in HT/VHT/HE). 313 */ 314 if (eht_oper && (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 315 struct cfg80211_chan_def eht_chandef = *chandef; 316 317 ieee80211_chandef_eht_oper(eht_oper, 318 eht_chandef.width == 319 NL80211_CHAN_WIDTH_160, 320 false, &eht_chandef); 321 322 if (!cfg80211_chandef_valid(&eht_chandef)) { 323 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 324 sdata_info(sdata, 325 "AP EHT information is invalid, disabling EHT\n"); 326 ret = IEEE80211_CONN_DISABLE_EHT; 327 goto out; 328 } 329 330 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 331 if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) 332 sdata_info(sdata, 333 "AP EHT information is incompatible, disabling EHT\n"); 334 ret = IEEE80211_CONN_DISABLE_EHT; 335 goto out; 336 } 337 338 *chandef = eht_chandef; 339 } 340 341 ret = 0; 342 343 out: 344 /* 345 * When tracking the current AP, don't do any further checks if the 346 * new chandef is identical to the one we're currently using for the 347 * connection. This keeps us from playing ping-pong with regulatory, 348 * without it the following can happen (for example): 349 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 350 * - AP advertises regdom US 351 * - CRDA loads regdom US with 80 MHz prohibited (old database) 352 * - the code below detects an unsupported channel, downgrades, and 353 * we disconnect from the AP in the caller 354 * - disconnect causes CRDA to reload world regdomain and the game 355 * starts anew. 356 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 357 * 358 * It seems possible that there are still scenarios with CSA or real 359 * bandwidth changes where a this could happen, but those cases are 360 * less common and wouldn't completely prevent using the AP. 361 */ 362 if (tracking && 363 cfg80211_chandef_identical(chandef, &link->conf->chandef)) 364 return ret; 365 366 /* don't print the message below for VHT mismatch if VHT is disabled */ 367 if (ret & IEEE80211_CONN_DISABLE_VHT) 368 vht_chandef = *chandef; 369 370 /* 371 * Ignore the DISABLED flag when we're already connected and only 372 * tracking the APs beacon for bandwidth changes - otherwise we 373 * might get disconnected here if we connect to an AP, update our 374 * regulatory information based on the AP's country IE and the 375 * information we have is wrong/outdated and disables the channel 376 * that we're actually using for the connection to the AP. 377 */ 378 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 379 tracking ? 0 : 380 IEEE80211_CHAN_DISABLED)) { 381 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 382 ret = IEEE80211_CONN_DISABLE_HT | 383 IEEE80211_CONN_DISABLE_VHT | 384 IEEE80211_CONN_DISABLE_HE | 385 IEEE80211_CONN_DISABLE_EHT; 386 break; 387 } 388 389 ret |= ieee80211_chandef_downgrade(chandef); 390 } 391 392 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 393 IEEE80211_CHAN_NO_HE)) 394 ret |= IEEE80211_CONN_DISABLE_HE | IEEE80211_CONN_DISABLE_EHT; 395 396 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 397 IEEE80211_CHAN_NO_EHT)) 398 ret |= IEEE80211_CONN_DISABLE_EHT; 399 400 if (chandef->width != vht_chandef.width && !tracking) 401 sdata_info(sdata, 402 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 403 404 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 405 return ret; 406 } 407 408 static int ieee80211_config_bw(struct ieee80211_link_data *link, 409 const struct ieee80211_ht_cap *ht_cap, 410 const struct ieee80211_vht_cap *vht_cap, 411 const struct ieee80211_ht_operation *ht_oper, 412 const struct ieee80211_vht_operation *vht_oper, 413 const struct ieee80211_he_operation *he_oper, 414 const struct ieee80211_eht_operation *eht_oper, 415 const struct ieee80211_s1g_oper_ie *s1g_oper, 416 const u8 *bssid, u32 *changed) 417 { 418 struct ieee80211_sub_if_data *sdata = link->sdata; 419 struct ieee80211_local *local = sdata->local; 420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 421 struct ieee80211_channel *chan = link->conf->chandef.chan; 422 struct ieee80211_supported_band *sband = 423 local->hw.wiphy->bands[chan->band]; 424 struct cfg80211_chan_def chandef; 425 u16 ht_opmode; 426 ieee80211_conn_flags_t flags; 427 u32 vht_cap_info = 0; 428 int ret; 429 430 /* if HT was/is disabled, don't track any bandwidth changes */ 431 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT || !ht_oper) 432 return 0; 433 434 /* don't check VHT if we associated as non-VHT station */ 435 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 436 vht_oper = NULL; 437 438 /* don't check HE if we associated as non-HE station */ 439 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE || 440 !ieee80211_get_he_iftype_cap(sband, 441 ieee80211_vif_type_p2p(&sdata->vif))) { 442 he_oper = NULL; 443 eht_oper = NULL; 444 } 445 446 /* don't check EHT if we associated as non-EHT station */ 447 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT || 448 !ieee80211_get_eht_iftype_cap(sband, 449 ieee80211_vif_type_p2p(&sdata->vif))) 450 eht_oper = NULL; 451 452 /* 453 * if bss configuration changed store the new one - 454 * this may be applicable even if channel is identical 455 */ 456 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 457 if (link->conf->ht_operation_mode != ht_opmode) { 458 *changed |= BSS_CHANGED_HT; 459 link->conf->ht_operation_mode = ht_opmode; 460 } 461 462 if (vht_cap) 463 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 464 465 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 466 flags = ieee80211_determine_chantype(sdata, link, 467 link->u.mgd.conn_flags, 468 sband, chan, vht_cap_info, 469 ht_oper, vht_oper, 470 he_oper, eht_oper, 471 s1g_oper, &chandef, true); 472 473 /* 474 * Downgrade the new channel if we associated with restricted 475 * capabilities. For example, if we associated as a 20 MHz STA 476 * to a 40 MHz AP (due to regulatory, capabilities or config 477 * reasons) then switching to a 40 MHz channel now won't do us 478 * any good -- we couldn't use it with the AP. 479 */ 480 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ && 481 chandef.width == NL80211_CHAN_WIDTH_80P80) 482 flags |= ieee80211_chandef_downgrade(&chandef); 483 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_160MHZ && 484 chandef.width == NL80211_CHAN_WIDTH_160) 485 flags |= ieee80211_chandef_downgrade(&chandef); 486 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_40MHZ && 487 chandef.width > NL80211_CHAN_WIDTH_20) 488 flags |= ieee80211_chandef_downgrade(&chandef); 489 490 if (cfg80211_chandef_identical(&chandef, &link->conf->chandef)) 491 return 0; 492 493 link_info(link, 494 "AP %pM changed bandwidth, new config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 495 link->u.mgd.bssid, chandef.chan->center_freq, 496 chandef.chan->freq_offset, chandef.width, 497 chandef.center_freq1, chandef.freq1_offset, 498 chandef.center_freq2); 499 500 if (flags != (link->u.mgd.conn_flags & 501 (IEEE80211_CONN_DISABLE_HT | 502 IEEE80211_CONN_DISABLE_VHT | 503 IEEE80211_CONN_DISABLE_HE | 504 IEEE80211_CONN_DISABLE_EHT | 505 IEEE80211_CONN_DISABLE_40MHZ | 506 IEEE80211_CONN_DISABLE_80P80MHZ | 507 IEEE80211_CONN_DISABLE_160MHZ | 508 IEEE80211_CONN_DISABLE_320MHZ)) || 509 !cfg80211_chandef_valid(&chandef)) { 510 sdata_info(sdata, 511 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 512 link->u.mgd.bssid, flags, ifmgd->flags); 513 return -EINVAL; 514 } 515 516 ret = ieee80211_link_change_bandwidth(link, &chandef, changed); 517 518 if (ret) { 519 sdata_info(sdata, 520 "AP %pM changed bandwidth to incompatible one - disconnect\n", 521 link->u.mgd.bssid); 522 return ret; 523 } 524 525 return 0; 526 } 527 528 /* frame sending functions */ 529 530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 531 struct sk_buff *skb, u8 ap_ht_param, 532 struct ieee80211_supported_band *sband, 533 struct ieee80211_channel *channel, 534 enum ieee80211_smps_mode smps, 535 ieee80211_conn_flags_t conn_flags) 536 { 537 u8 *pos; 538 u32 flags = channel->flags; 539 u16 cap; 540 struct ieee80211_sta_ht_cap ht_cap; 541 542 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 543 544 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 545 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 546 547 /* determine capability flags */ 548 cap = ht_cap.cap; 549 550 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 551 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 552 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 553 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 554 cap &= ~IEEE80211_HT_CAP_SGI_40; 555 } 556 break; 557 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 558 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 559 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 560 cap &= ~IEEE80211_HT_CAP_SGI_40; 561 } 562 break; 563 } 564 565 /* 566 * If 40 MHz was disabled associate as though we weren't 567 * capable of 40 MHz -- some broken APs will never fall 568 * back to trying to transmit in 20 MHz. 569 */ 570 if (conn_flags & IEEE80211_CONN_DISABLE_40MHZ) { 571 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 572 cap &= ~IEEE80211_HT_CAP_SGI_40; 573 } 574 575 /* set SM PS mode properly */ 576 cap &= ~IEEE80211_HT_CAP_SM_PS; 577 switch (smps) { 578 case IEEE80211_SMPS_AUTOMATIC: 579 case IEEE80211_SMPS_NUM_MODES: 580 WARN_ON(1); 581 fallthrough; 582 case IEEE80211_SMPS_OFF: 583 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 584 IEEE80211_HT_CAP_SM_PS_SHIFT; 585 break; 586 case IEEE80211_SMPS_STATIC: 587 cap |= WLAN_HT_CAP_SM_PS_STATIC << 588 IEEE80211_HT_CAP_SM_PS_SHIFT; 589 break; 590 case IEEE80211_SMPS_DYNAMIC: 591 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 592 IEEE80211_HT_CAP_SM_PS_SHIFT; 593 break; 594 } 595 596 /* reserve and fill IE */ 597 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 598 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 599 } 600 601 /* This function determines vht capability flags for the association 602 * and builds the IE. 603 * Note - the function returns true to own the MU-MIMO capability 604 */ 605 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 606 struct sk_buff *skb, 607 struct ieee80211_supported_band *sband, 608 struct ieee80211_vht_cap *ap_vht_cap, 609 ieee80211_conn_flags_t conn_flags) 610 { 611 struct ieee80211_local *local = sdata->local; 612 u8 *pos; 613 u32 cap; 614 struct ieee80211_sta_vht_cap vht_cap; 615 u32 mask, ap_bf_sts, our_bf_sts; 616 bool mu_mimo_owner = false; 617 618 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 619 620 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 621 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 622 623 /* determine capability flags */ 624 cap = vht_cap.cap; 625 626 if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ) { 627 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 628 629 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 630 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 631 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 632 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 633 } 634 635 if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ) { 636 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 637 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 638 } 639 640 /* 641 * Some APs apparently get confused if our capabilities are better 642 * than theirs, so restrict what we advertise in the assoc request. 643 */ 644 if (!(ap_vht_cap->vht_cap_info & 645 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 646 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 647 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 648 else if (!(ap_vht_cap->vht_cap_info & 649 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 650 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 651 652 /* 653 * If some other vif is using the MU-MIMO capability we cannot associate 654 * using MU-MIMO - this will lead to contradictions in the group-id 655 * mechanism. 656 * Ownership is defined since association request, in order to avoid 657 * simultaneous associations with MU-MIMO. 658 */ 659 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 660 bool disable_mu_mimo = false; 661 struct ieee80211_sub_if_data *other; 662 663 list_for_each_entry_rcu(other, &local->interfaces, list) { 664 if (other->vif.bss_conf.mu_mimo_owner) { 665 disable_mu_mimo = true; 666 break; 667 } 668 } 669 if (disable_mu_mimo) 670 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 671 else 672 mu_mimo_owner = true; 673 } 674 675 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 676 677 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 678 our_bf_sts = cap & mask; 679 680 if (ap_bf_sts < our_bf_sts) { 681 cap &= ~mask; 682 cap |= ap_bf_sts; 683 } 684 685 /* reserve and fill IE */ 686 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 687 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 688 689 return mu_mimo_owner; 690 } 691 692 /* This function determines HE capability flags for the association 693 * and builds the IE. 694 */ 695 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 696 struct sk_buff *skb, 697 struct ieee80211_supported_band *sband, 698 enum ieee80211_smps_mode smps_mode, 699 ieee80211_conn_flags_t conn_flags) 700 { 701 u8 *pos, *pre_he_pos; 702 const struct ieee80211_sta_he_cap *he_cap; 703 u8 he_cap_size; 704 705 he_cap = ieee80211_get_he_iftype_cap(sband, 706 ieee80211_vif_type_p2p(&sdata->vif)); 707 if (WARN_ON(!he_cap)) 708 return; 709 710 /* get a max size estimate */ 711 he_cap_size = 712 2 + 1 + sizeof(he_cap->he_cap_elem) + 713 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 714 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 715 he_cap->he_cap_elem.phy_cap_info); 716 pos = skb_put(skb, he_cap_size); 717 pre_he_pos = pos; 718 pos = ieee80211_ie_build_he_cap(conn_flags, 719 pos, he_cap, pos + he_cap_size); 720 /* trim excess if any */ 721 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 722 723 ieee80211_ie_build_he_6ghz_cap(sdata, smps_mode, skb); 724 } 725 726 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 727 struct sk_buff *skb, 728 struct ieee80211_supported_band *sband) 729 { 730 u8 *pos; 731 const struct ieee80211_sta_he_cap *he_cap; 732 const struct ieee80211_sta_eht_cap *eht_cap; 733 u8 eht_cap_size; 734 735 he_cap = ieee80211_get_he_iftype_cap(sband, 736 ieee80211_vif_type_p2p(&sdata->vif)); 737 eht_cap = ieee80211_get_eht_iftype_cap(sband, 738 ieee80211_vif_type_p2p(&sdata->vif)); 739 740 /* 741 * EHT capabilities element is only added if the HE capabilities element 742 * was added so assume that 'he_cap' is valid and don't check it. 743 */ 744 if (WARN_ON(!he_cap || !eht_cap)) 745 return; 746 747 eht_cap_size = 748 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 749 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 750 &eht_cap->eht_cap_elem, 751 false) + 752 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 753 eht_cap->eht_cap_elem.phy_cap_info); 754 pos = skb_put(skb, eht_cap_size); 755 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size, 756 false); 757 } 758 759 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 760 enum nl80211_chan_width width, 761 struct ieee80211_supported_band *sband, 762 struct ieee80211_mgd_assoc_data *assoc_data) 763 { 764 unsigned int shift = ieee80211_chanwidth_get_shift(width); 765 unsigned int rates_len, supp_rates_len; 766 u32 rates = 0; 767 int i, count; 768 u8 *pos; 769 770 if (assoc_data->supp_rates_len) { 771 /* 772 * Get all rates supported by the device and the AP as 773 * some APs don't like getting a superset of their rates 774 * in the association request (e.g. D-Link DAP 1353 in 775 * b-only mode)... 776 */ 777 rates_len = ieee80211_parse_bitrates(width, sband, 778 assoc_data->supp_rates, 779 assoc_data->supp_rates_len, 780 &rates); 781 } else { 782 /* 783 * In case AP not provide any supported rates information 784 * before association, we send information element(s) with 785 * all rates that we support. 786 */ 787 rates_len = sband->n_bitrates; 788 for (i = 0; i < sband->n_bitrates; i++) 789 rates |= BIT(i); 790 } 791 792 supp_rates_len = rates_len; 793 if (supp_rates_len > 8) 794 supp_rates_len = 8; 795 796 pos = skb_put(skb, supp_rates_len + 2); 797 *pos++ = WLAN_EID_SUPP_RATES; 798 *pos++ = supp_rates_len; 799 800 count = 0; 801 for (i = 0; i < sband->n_bitrates; i++) { 802 if (BIT(i) & rates) { 803 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 804 5 * (1 << shift)); 805 *pos++ = (u8)rate; 806 if (++count == 8) 807 break; 808 } 809 } 810 811 if (rates_len > count) { 812 pos = skb_put(skb, rates_len - count + 2); 813 *pos++ = WLAN_EID_EXT_SUPP_RATES; 814 *pos++ = rates_len - count; 815 816 for (i++; i < sband->n_bitrates; i++) { 817 if (BIT(i) & rates) { 818 int rate; 819 820 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 821 5 * (1 << shift)); 822 *pos++ = (u8)rate; 823 } 824 } 825 } 826 } 827 828 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 829 const u8 *elems, 830 size_t elems_len, 831 size_t offset) 832 { 833 size_t noffset; 834 835 static const u8 before_ht[] = { 836 WLAN_EID_SSID, 837 WLAN_EID_SUPP_RATES, 838 WLAN_EID_EXT_SUPP_RATES, 839 WLAN_EID_PWR_CAPABILITY, 840 WLAN_EID_SUPPORTED_CHANNELS, 841 WLAN_EID_RSN, 842 WLAN_EID_QOS_CAPA, 843 WLAN_EID_RRM_ENABLED_CAPABILITIES, 844 WLAN_EID_MOBILITY_DOMAIN, 845 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 846 WLAN_EID_RIC_DATA, /* reassoc only */ 847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 848 }; 849 static const u8 after_ric[] = { 850 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 851 WLAN_EID_HT_CAPABILITY, 852 WLAN_EID_BSS_COEX_2040, 853 /* luckily this is almost always there */ 854 WLAN_EID_EXT_CAPABILITY, 855 WLAN_EID_QOS_TRAFFIC_CAPA, 856 WLAN_EID_TIM_BCAST_REQ, 857 WLAN_EID_INTERWORKING, 858 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 859 WLAN_EID_VHT_CAPABILITY, 860 WLAN_EID_OPMODE_NOTIF, 861 }; 862 863 if (!elems_len) 864 return offset; 865 866 noffset = ieee80211_ie_split_ric(elems, elems_len, 867 before_ht, 868 ARRAY_SIZE(before_ht), 869 after_ric, 870 ARRAY_SIZE(after_ric), 871 offset); 872 skb_put_data(skb, elems + offset, noffset - offset); 873 874 return noffset; 875 } 876 877 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 878 const u8 *elems, 879 size_t elems_len, 880 size_t offset) 881 { 882 static const u8 before_vht[] = { 883 /* 884 * no need to list the ones split off before HT 885 * or generated here 886 */ 887 WLAN_EID_BSS_COEX_2040, 888 WLAN_EID_EXT_CAPABILITY, 889 WLAN_EID_QOS_TRAFFIC_CAPA, 890 WLAN_EID_TIM_BCAST_REQ, 891 WLAN_EID_INTERWORKING, 892 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 893 }; 894 size_t noffset; 895 896 if (!elems_len) 897 return offset; 898 899 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 900 noffset = ieee80211_ie_split(elems, elems_len, 901 before_vht, ARRAY_SIZE(before_vht), 902 offset); 903 skb_put_data(skb, elems + offset, noffset - offset); 904 905 return noffset; 906 } 907 908 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 909 const u8 *elems, 910 size_t elems_len, 911 size_t offset) 912 { 913 static const u8 before_he[] = { 914 /* 915 * no need to list the ones split off before VHT 916 * or generated here 917 */ 918 WLAN_EID_OPMODE_NOTIF, 919 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 920 /* 11ai elements */ 921 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 922 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 923 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 924 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 925 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 926 /* TODO: add 11ah/11aj/11ak elements */ 927 }; 928 size_t noffset; 929 930 if (!elems_len) 931 return offset; 932 933 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 934 noffset = ieee80211_ie_split(elems, elems_len, 935 before_he, ARRAY_SIZE(before_he), 936 offset); 937 skb_put_data(skb, elems + offset, noffset - offset); 938 939 return noffset; 940 } 941 942 #define PRESENT_ELEMS_MAX 8 943 #define PRESENT_ELEM_EXT_OFFS 0x100 944 945 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 946 struct sk_buff *skb, u16 capab, 947 const struct element *ext_capa, 948 const u16 *present_elems); 949 950 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 951 struct sk_buff *skb, u16 *capab, 952 const struct element *ext_capa, 953 const u8 *extra_elems, 954 size_t extra_elems_len, 955 unsigned int link_id, 956 struct ieee80211_link_data *link, 957 u16 *present_elems) 958 { 959 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 961 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 962 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 963 struct ieee80211_channel *chan = cbss->channel; 964 const struct ieee80211_sband_iftype_data *iftd; 965 struct ieee80211_local *local = sdata->local; 966 struct ieee80211_supported_band *sband; 967 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 968 struct ieee80211_chanctx_conf *chanctx_conf; 969 enum ieee80211_smps_mode smps_mode; 970 u16 orig_capab = *capab; 971 size_t offset = 0; 972 int present_elems_len = 0; 973 u8 *pos; 974 int i; 975 976 #define ADD_PRESENT_ELEM(id) do { \ 977 /* need a last for termination - we use 0 == SSID */ \ 978 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 979 present_elems[present_elems_len++] = (id); \ 980 } while (0) 981 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 982 983 if (link) 984 smps_mode = link->smps_mode; 985 else if (sdata->u.mgd.powersave) 986 smps_mode = IEEE80211_SMPS_DYNAMIC; 987 else 988 smps_mode = IEEE80211_SMPS_OFF; 989 990 if (link) { 991 /* 992 * 5/10 MHz scenarios are only viable without MLO, in which 993 * case this pointer should be used ... All of this is a bit 994 * unclear though, not sure this even works at all. 995 */ 996 rcu_read_lock(); 997 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 998 if (chanctx_conf) 999 width = chanctx_conf->def.width; 1000 rcu_read_unlock(); 1001 } 1002 1003 sband = local->hw.wiphy->bands[chan->band]; 1004 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1005 1006 if (sband->band == NL80211_BAND_2GHZ) { 1007 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1008 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1009 } 1010 1011 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1012 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1013 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1014 1015 if (sband->band != NL80211_BAND_S1GHZ) 1016 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1017 1018 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1019 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1020 struct cfg80211_chan_def chandef = { 1021 .width = width, 1022 .chan = chan, 1023 }; 1024 1025 pos = skb_put(skb, 4); 1026 *pos++ = WLAN_EID_PWR_CAPABILITY; 1027 *pos++ = 2; 1028 *pos++ = 0; /* min tx power */ 1029 /* max tx power */ 1030 *pos++ = ieee80211_chandef_max_power(&chandef); 1031 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1032 } 1033 1034 /* 1035 * Per spec, we shouldn't include the list of channels if we advertise 1036 * support for extended channel switching, but we've always done that; 1037 * (for now?) apply this restriction only on the (new) 6 GHz band. 1038 */ 1039 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1040 (sband->band != NL80211_BAND_6GHZ || 1041 !ext_capa || ext_capa->datalen < 1 || 1042 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1043 /* TODO: get this in reg domain format */ 1044 pos = skb_put(skb, 2 * sband->n_channels + 2); 1045 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1046 *pos++ = 2 * sband->n_channels; 1047 for (i = 0; i < sband->n_channels; i++) { 1048 int cf = sband->channels[i].center_freq; 1049 1050 *pos++ = ieee80211_frequency_to_channel(cf); 1051 *pos++ = 1; /* one channel in the subband*/ 1052 } 1053 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1054 } 1055 1056 /* if present, add any custom IEs that go before HT */ 1057 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1058 extra_elems_len, 1059 offset); 1060 1061 if (sband->band != NL80211_BAND_6GHZ && 1062 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT)) { 1063 ieee80211_add_ht_ie(sdata, skb, 1064 assoc_data->link[link_id].ap_ht_param, 1065 sband, chan, smps_mode, 1066 assoc_data->link[link_id].conn_flags); 1067 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1068 } 1069 1070 /* if present, add any custom IEs that go before VHT */ 1071 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1072 extra_elems_len, 1073 offset); 1074 1075 if (sband->band != NL80211_BAND_6GHZ && 1076 !(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 1077 bool mu_mimo_owner = 1078 ieee80211_add_vht_ie(sdata, skb, sband, 1079 &assoc_data->link[link_id].ap_vht_cap, 1080 assoc_data->link[link_id].conn_flags); 1081 1082 if (link) 1083 link->conf->mu_mimo_owner = mu_mimo_owner; 1084 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1085 } 1086 1087 /* 1088 * If AP doesn't support HT, mark HE and EHT as disabled. 1089 * If on the 5GHz band, make sure it supports VHT. 1090 */ 1091 if (assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HT || 1092 (sband->band == NL80211_BAND_5GHZ && 1093 assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_VHT)) 1094 assoc_data->link[link_id].conn_flags |= 1095 IEEE80211_CONN_DISABLE_HE | 1096 IEEE80211_CONN_DISABLE_EHT; 1097 1098 /* if present, add any custom IEs that go before HE */ 1099 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1100 extra_elems_len, 1101 offset); 1102 1103 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_HE)) { 1104 ieee80211_add_he_ie(sdata, skb, sband, smps_mode, 1105 assoc_data->link[link_id].conn_flags); 1106 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1107 } 1108 1109 /* 1110 * careful - need to know about all the present elems before 1111 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1112 * we're going to put it after the ML element 1113 */ 1114 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1115 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1116 1117 if (link_id == assoc_data->assoc_link_id) 1118 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1119 present_elems); 1120 1121 /* crash if somebody gets it wrong */ 1122 present_elems = NULL; 1123 1124 if (!(assoc_data->link[link_id].conn_flags & IEEE80211_CONN_DISABLE_EHT)) 1125 ieee80211_add_eht_ie(sdata, skb, sband); 1126 1127 if (sband->band == NL80211_BAND_S1GHZ) { 1128 ieee80211_add_aid_request_ie(sdata, skb); 1129 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1130 } 1131 1132 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1133 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1134 1135 if (link) 1136 link->u.mgd.conn_flags = assoc_data->link[link_id].conn_flags; 1137 1138 return offset; 1139 } 1140 1141 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1142 const u16 *outer, 1143 const u16 *inner) 1144 { 1145 unsigned int skb_len = skb->len; 1146 bool added = false; 1147 int i, j; 1148 u8 *len, *list_len = NULL; 1149 1150 skb_put_u8(skb, WLAN_EID_EXTENSION); 1151 len = skb_put(skb, 1); 1152 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1153 1154 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1155 u16 elem = outer[i]; 1156 bool have_inner = false; 1157 bool at_extension = false; 1158 1159 /* should at least be sorted in the sense of normal -> ext */ 1160 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1161 1162 /* switch to extension list */ 1163 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1164 at_extension = true; 1165 if (!list_len) 1166 skb_put_u8(skb, 0); 1167 list_len = NULL; 1168 } 1169 1170 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1171 if (elem == inner[j]) { 1172 have_inner = true; 1173 break; 1174 } 1175 } 1176 1177 if (have_inner) 1178 continue; 1179 1180 if (!list_len) { 1181 list_len = skb_put(skb, 1); 1182 *list_len = 0; 1183 } 1184 *list_len += 1; 1185 skb_put_u8(skb, (u8)elem); 1186 } 1187 1188 if (!added) 1189 skb_trim(skb, skb_len); 1190 else 1191 *len = skb->len - skb_len - 2; 1192 } 1193 1194 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1195 struct sk_buff *skb, u16 capab, 1196 const struct element *ext_capa, 1197 const u16 *outer_present_elems) 1198 { 1199 struct ieee80211_local *local = sdata->local; 1200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1201 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1202 struct ieee80211_multi_link_elem *ml_elem; 1203 struct ieee80211_mle_basic_common_info *common; 1204 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1205 __le16 eml_capa = 0, mld_capa_ops = 0; 1206 unsigned int link_id; 1207 u8 *ml_elem_len; 1208 void *capab_pos; 1209 1210 if (!sdata->vif.valid_links) 1211 return; 1212 1213 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1214 ieee80211_vif_type_p2p(&sdata->vif)); 1215 if (ift_ext_capa) { 1216 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1217 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1218 } 1219 1220 skb_put_u8(skb, WLAN_EID_EXTENSION); 1221 ml_elem_len = skb_put(skb, 1); 1222 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1223 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1224 ml_elem->control = 1225 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1226 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1227 common = skb_put(skb, sizeof(*common)); 1228 common->len = sizeof(*common) + 1229 2; /* MLD capa/ops */ 1230 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1231 1232 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1233 if (eml_capa & 1234 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1235 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1236 common->len += 2; /* EML capabilities */ 1237 ml_elem->control |= 1238 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1239 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1240 } 1241 /* need indication from userspace to support this */ 1242 mld_capa_ops &= ~cpu_to_le16(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP); 1243 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1244 1245 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1246 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1247 const u8 *extra_elems; 1248 size_t extra_elems_len; 1249 size_t extra_used; 1250 u8 *subelem_len = NULL; 1251 __le16 ctrl; 1252 1253 if (!assoc_data->link[link_id].bss || 1254 link_id == assoc_data->assoc_link_id) 1255 continue; 1256 1257 extra_elems = assoc_data->link[link_id].elems; 1258 extra_elems_len = assoc_data->link[link_id].elems_len; 1259 1260 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1261 subelem_len = skb_put(skb, 1); 1262 1263 ctrl = cpu_to_le16(link_id | 1264 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1265 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1266 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1267 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1268 skb_put_data(skb, assoc_data->link[link_id].addr, 1269 ETH_ALEN); 1270 /* 1271 * Now add the contents of the (re)association request, 1272 * but the "listen interval" and "current AP address" 1273 * (if applicable) are skipped. So we only have 1274 * the capability field (remember the position and fill 1275 * later), followed by the elements added below by 1276 * calling ieee80211_assoc_link_elems(). 1277 */ 1278 capab_pos = skb_put(skb, 2); 1279 1280 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1281 ext_capa, 1282 extra_elems, 1283 extra_elems_len, 1284 link_id, NULL, 1285 link_present_elems); 1286 if (extra_elems) 1287 skb_put_data(skb, extra_elems + extra_used, 1288 extra_elems_len - extra_used); 1289 1290 put_unaligned_le16(capab, capab_pos); 1291 1292 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1293 link_present_elems); 1294 1295 ieee80211_fragment_element(skb, subelem_len); 1296 } 1297 1298 ieee80211_fragment_element(skb, ml_elem_len); 1299 } 1300 1301 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1302 { 1303 struct ieee80211_local *local = sdata->local; 1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1305 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1306 struct ieee80211_link_data *link; 1307 struct sk_buff *skb; 1308 struct ieee80211_mgmt *mgmt; 1309 u8 *pos, qos_info, *ie_start; 1310 size_t offset, noffset; 1311 u16 capab = WLAN_CAPABILITY_ESS, link_capab; 1312 __le16 listen_int; 1313 struct element *ext_capa = NULL; 1314 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1315 struct ieee80211_prep_tx_info info = {}; 1316 unsigned int link_id, n_links = 0; 1317 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1318 void *capab_pos; 1319 size_t size; 1320 int ret; 1321 1322 /* we know it's writable, cast away the const */ 1323 if (assoc_data->ie_len) 1324 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1325 assoc_data->ie, 1326 assoc_data->ie_len); 1327 1328 sdata_assert_lock(sdata); 1329 1330 size = local->hw.extra_tx_headroom + 1331 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1332 2 + assoc_data->ssid_len + /* SSID */ 1333 assoc_data->ie_len + /* extra IEs */ 1334 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1335 9; /* WMM */ 1336 1337 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1338 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1339 const struct ieee80211_sband_iftype_data *iftd; 1340 struct ieee80211_supported_band *sband; 1341 1342 if (!cbss) 1343 continue; 1344 1345 sband = local->hw.wiphy->bands[cbss->channel->band]; 1346 1347 n_links++; 1348 /* add STA profile elements length */ 1349 size += assoc_data->link[link_id].elems_len; 1350 /* and supported rates length */ 1351 size += 4 + sband->n_bitrates; 1352 /* supported channels */ 1353 size += 2 + 2 * sband->n_channels; 1354 1355 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1356 if (iftd) 1357 size += iftd->vendor_elems.len; 1358 1359 /* power capability */ 1360 size += 4; 1361 1362 /* HT, VHT, HE, EHT */ 1363 size += 2 + sizeof(struct ieee80211_ht_cap); 1364 size += 2 + sizeof(struct ieee80211_vht_cap); 1365 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1366 sizeof(struct ieee80211_he_mcs_nss_supp) + 1367 IEEE80211_HE_PPE_THRES_MAX_LEN; 1368 1369 if (sband->band == NL80211_BAND_6GHZ) 1370 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1371 1372 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1373 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1374 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1375 1376 /* non-inheritance element */ 1377 size += 2 + 2 + PRESENT_ELEMS_MAX; 1378 1379 /* should be the same across all BSSes */ 1380 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1381 capab |= WLAN_CAPABILITY_PRIVACY; 1382 } 1383 1384 if (sdata->vif.valid_links) { 1385 /* consider the multi-link element with STA profile */ 1386 size += sizeof(struct ieee80211_multi_link_elem); 1387 /* max common info field in basic multi-link element */ 1388 size += sizeof(struct ieee80211_mle_basic_common_info) + 1389 2 + /* capa & op */ 1390 2; /* EML capa */ 1391 1392 /* 1393 * The capability elements were already considered above; 1394 * note this over-estimates a bit because there's no 1395 * STA profile for the assoc link. 1396 */ 1397 size += (n_links - 1) * 1398 (1 + 1 + /* subelement ID/length */ 1399 2 + /* STA control */ 1400 1 + ETH_ALEN + 2 /* STA Info field */); 1401 } 1402 1403 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1404 if (WARN_ON(!link)) 1405 return -EINVAL; 1406 1407 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1408 return -EINVAL; 1409 1410 skb = alloc_skb(size, GFP_KERNEL); 1411 if (!skb) 1412 return -ENOMEM; 1413 1414 skb_reserve(skb, local->hw.extra_tx_headroom); 1415 1416 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1417 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1418 1419 /* Set MBSSID support for HE AP if needed */ 1420 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1421 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 1422 ext_capa && ext_capa->datalen >= 3) 1423 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1424 1425 mgmt = skb_put_zero(skb, 24); 1426 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1427 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1428 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1429 1430 listen_int = cpu_to_le16(assoc_data->s1g ? 1431 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1432 local->hw.conf.listen_interval); 1433 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1434 skb_put(skb, 10); 1435 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1436 IEEE80211_STYPE_REASSOC_REQ); 1437 capab_pos = &mgmt->u.reassoc_req.capab_info; 1438 mgmt->u.reassoc_req.listen_interval = listen_int; 1439 memcpy(mgmt->u.reassoc_req.current_ap, 1440 assoc_data->prev_ap_addr, ETH_ALEN); 1441 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1442 } else { 1443 skb_put(skb, 4); 1444 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1445 IEEE80211_STYPE_ASSOC_REQ); 1446 capab_pos = &mgmt->u.assoc_req.capab_info; 1447 mgmt->u.assoc_req.listen_interval = listen_int; 1448 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1449 } 1450 1451 /* SSID */ 1452 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1453 ie_start = pos; 1454 *pos++ = WLAN_EID_SSID; 1455 *pos++ = assoc_data->ssid_len; 1456 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1457 1458 /* add the elements for the assoc (main) link */ 1459 link_capab = capab; 1460 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1461 ext_capa, 1462 assoc_data->ie, 1463 assoc_data->ie_len, 1464 assoc_data->assoc_link_id, link, 1465 present_elems); 1466 put_unaligned_le16(link_capab, capab_pos); 1467 1468 /* if present, add any custom non-vendor IEs */ 1469 if (assoc_data->ie_len) { 1470 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1471 assoc_data->ie_len, 1472 offset); 1473 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1474 offset = noffset; 1475 } 1476 1477 if (assoc_data->wmm) { 1478 if (assoc_data->uapsd) { 1479 qos_info = ifmgd->uapsd_queues; 1480 qos_info |= (ifmgd->uapsd_max_sp_len << 1481 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1482 } else { 1483 qos_info = 0; 1484 } 1485 1486 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1487 } 1488 1489 /* add any remaining custom (i.e. vendor specific here) IEs */ 1490 if (assoc_data->ie_len) { 1491 noffset = assoc_data->ie_len; 1492 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1493 } 1494 1495 if (assoc_data->fils_kek_len) { 1496 ret = fils_encrypt_assoc_req(skb, assoc_data); 1497 if (ret < 0) { 1498 dev_kfree_skb(skb); 1499 return ret; 1500 } 1501 } 1502 1503 pos = skb_tail_pointer(skb); 1504 kfree(ifmgd->assoc_req_ies); 1505 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1506 if (!ifmgd->assoc_req_ies) { 1507 dev_kfree_skb(skb); 1508 return -ENOMEM; 1509 } 1510 1511 ifmgd->assoc_req_ies_len = pos - ie_start; 1512 1513 drv_mgd_prepare_tx(local, sdata, &info); 1514 1515 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1516 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1517 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1518 IEEE80211_TX_INTFL_MLME_CONN_TX; 1519 ieee80211_tx_skb(sdata, skb); 1520 1521 return 0; 1522 } 1523 1524 void ieee80211_send_pspoll(struct ieee80211_local *local, 1525 struct ieee80211_sub_if_data *sdata) 1526 { 1527 struct ieee80211_pspoll *pspoll; 1528 struct sk_buff *skb; 1529 1530 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1531 if (!skb) 1532 return; 1533 1534 pspoll = (struct ieee80211_pspoll *) skb->data; 1535 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1536 1537 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1538 ieee80211_tx_skb(sdata, skb); 1539 } 1540 1541 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1542 struct ieee80211_sub_if_data *sdata, 1543 bool powersave) 1544 { 1545 struct sk_buff *skb; 1546 struct ieee80211_hdr_3addr *nullfunc; 1547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1548 1549 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1550 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1551 if (!skb) 1552 return; 1553 1554 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1555 if (powersave) 1556 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1557 1558 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1559 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1560 1561 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1562 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1563 1564 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1565 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1566 1567 ieee80211_tx_skb(sdata, skb); 1568 } 1569 1570 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1571 struct ieee80211_sub_if_data *sdata) 1572 { 1573 struct sk_buff *skb; 1574 struct ieee80211_hdr *nullfunc; 1575 __le16 fc; 1576 1577 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1578 return; 1579 1580 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1581 if (!skb) 1582 return; 1583 1584 skb_reserve(skb, local->hw.extra_tx_headroom); 1585 1586 nullfunc = skb_put_zero(skb, 30); 1587 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1588 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1589 nullfunc->frame_control = fc; 1590 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1591 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1592 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1593 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1594 1595 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1597 ieee80211_tx_skb(sdata, skb); 1598 } 1599 1600 /* spectrum management related things */ 1601 static void ieee80211_chswitch_work(struct work_struct *work) 1602 { 1603 struct ieee80211_link_data *link = 1604 container_of(work, struct ieee80211_link_data, u.mgd.chswitch_work); 1605 struct ieee80211_sub_if_data *sdata = link->sdata; 1606 struct ieee80211_local *local = sdata->local; 1607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1608 int ret; 1609 1610 if (!ieee80211_sdata_running(sdata)) 1611 return; 1612 1613 sdata_lock(sdata); 1614 mutex_lock(&local->mtx); 1615 mutex_lock(&local->chanctx_mtx); 1616 1617 if (!ifmgd->associated) 1618 goto out; 1619 1620 if (!link->conf->csa_active) 1621 goto out; 1622 1623 /* 1624 * using reservation isn't immediate as it may be deferred until later 1625 * with multi-vif. once reservation is complete it will re-schedule the 1626 * work with no reserved_chanctx so verify chandef to check if it 1627 * completed successfully 1628 */ 1629 1630 if (link->reserved_chanctx) { 1631 /* 1632 * with multi-vif csa driver may call ieee80211_csa_finish() 1633 * many times while waiting for other interfaces to use their 1634 * reservations 1635 */ 1636 if (link->reserved_ready) 1637 goto out; 1638 1639 ret = ieee80211_link_use_reserved_context(link); 1640 if (ret) { 1641 sdata_info(sdata, 1642 "failed to use reserved channel context, disconnecting (err=%d)\n", 1643 ret); 1644 ieee80211_queue_work(&sdata->local->hw, 1645 &ifmgd->csa_connection_drop_work); 1646 goto out; 1647 } 1648 1649 goto out; 1650 } 1651 1652 if (!cfg80211_chandef_identical(&link->conf->chandef, 1653 &link->csa_chandef)) { 1654 sdata_info(sdata, 1655 "failed to finalize channel switch, disconnecting\n"); 1656 ieee80211_queue_work(&sdata->local->hw, 1657 &ifmgd->csa_connection_drop_work); 1658 goto out; 1659 } 1660 1661 link->u.mgd.csa_waiting_bcn = true; 1662 1663 ieee80211_sta_reset_beacon_monitor(sdata); 1664 ieee80211_sta_reset_conn_monitor(sdata); 1665 1666 out: 1667 mutex_unlock(&local->chanctx_mtx); 1668 mutex_unlock(&local->mtx); 1669 sdata_unlock(sdata); 1670 } 1671 1672 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1673 { 1674 struct ieee80211_sub_if_data *sdata = link->sdata; 1675 struct ieee80211_local *local = sdata->local; 1676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1677 int ret; 1678 1679 sdata_assert_lock(sdata); 1680 1681 WARN_ON(!link->conf->csa_active); 1682 1683 if (link->csa_block_tx) { 1684 ieee80211_wake_vif_queues(local, sdata, 1685 IEEE80211_QUEUE_STOP_REASON_CSA); 1686 link->csa_block_tx = false; 1687 } 1688 1689 link->conf->csa_active = false; 1690 link->u.mgd.csa_waiting_bcn = false; 1691 /* 1692 * If the CSA IE is still present on the beacon after the switch, 1693 * we need to consider it as a new CSA (possibly to self). 1694 */ 1695 link->u.mgd.beacon_crc_valid = false; 1696 1697 ret = drv_post_channel_switch(sdata); 1698 if (ret) { 1699 sdata_info(sdata, 1700 "driver post channel switch failed, disconnecting\n"); 1701 ieee80211_queue_work(&local->hw, 1702 &ifmgd->csa_connection_drop_work); 1703 return; 1704 } 1705 1706 cfg80211_ch_switch_notify(sdata->dev, &link->reserved_chandef, 0); 1707 } 1708 1709 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1710 { 1711 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1713 1714 if (WARN_ON(sdata->vif.valid_links)) 1715 success = false; 1716 1717 trace_api_chswitch_done(sdata, success); 1718 if (!success) { 1719 sdata_info(sdata, 1720 "driver channel switch failed, disconnecting\n"); 1721 ieee80211_queue_work(&sdata->local->hw, 1722 &ifmgd->csa_connection_drop_work); 1723 } else { 1724 ieee80211_queue_work(&sdata->local->hw, 1725 &sdata->deflink.u.mgd.chswitch_work); 1726 } 1727 } 1728 EXPORT_SYMBOL(ieee80211_chswitch_done); 1729 1730 static void ieee80211_chswitch_timer(struct timer_list *t) 1731 { 1732 struct ieee80211_link_data *link = 1733 from_timer(link, t, u.mgd.chswitch_timer); 1734 1735 ieee80211_queue_work(&link->sdata->local->hw, 1736 &link->u.mgd.chswitch_work); 1737 } 1738 1739 static void 1740 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1741 { 1742 struct ieee80211_sub_if_data *sdata = link->sdata; 1743 struct ieee80211_local *local = sdata->local; 1744 1745 if (!local->ops->abort_channel_switch) 1746 return; 1747 1748 mutex_lock(&local->mtx); 1749 1750 mutex_lock(&local->chanctx_mtx); 1751 ieee80211_link_unreserve_chanctx(link); 1752 mutex_unlock(&local->chanctx_mtx); 1753 1754 if (link->csa_block_tx) 1755 ieee80211_wake_vif_queues(local, sdata, 1756 IEEE80211_QUEUE_STOP_REASON_CSA); 1757 1758 link->csa_block_tx = false; 1759 link->conf->csa_active = false; 1760 1761 mutex_unlock(&local->mtx); 1762 1763 drv_abort_channel_switch(sdata); 1764 } 1765 1766 static void 1767 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 1768 u64 timestamp, u32 device_timestamp, 1769 struct ieee802_11_elems *elems, 1770 bool beacon) 1771 { 1772 struct ieee80211_sub_if_data *sdata = link->sdata; 1773 struct ieee80211_local *local = sdata->local; 1774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1775 struct cfg80211_bss *cbss = link->u.mgd.bss; 1776 struct ieee80211_chanctx_conf *conf; 1777 struct ieee80211_chanctx *chanctx; 1778 enum nl80211_band current_band; 1779 struct ieee80211_csa_ie csa_ie; 1780 struct ieee80211_channel_switch ch_switch; 1781 struct ieee80211_bss *bss; 1782 int res; 1783 1784 sdata_assert_lock(sdata); 1785 1786 if (!cbss) 1787 return; 1788 1789 if (local->scanning) 1790 return; 1791 1792 current_band = cbss->channel->band; 1793 bss = (void *)cbss->priv; 1794 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1795 bss->vht_cap_info, 1796 link->u.mgd.conn_flags, 1797 link->u.mgd.bssid, &csa_ie); 1798 1799 if (!res) { 1800 ch_switch.timestamp = timestamp; 1801 ch_switch.device_timestamp = device_timestamp; 1802 ch_switch.block_tx = csa_ie.mode; 1803 ch_switch.chandef = csa_ie.chandef; 1804 ch_switch.count = csa_ie.count; 1805 ch_switch.delay = csa_ie.max_switch_time; 1806 } 1807 1808 if (res < 0) 1809 goto lock_and_drop_connection; 1810 1811 if (beacon && link->conf->csa_active && 1812 !link->u.mgd.csa_waiting_bcn) { 1813 if (res) 1814 ieee80211_sta_abort_chanswitch(link); 1815 else 1816 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1817 return; 1818 } else if (link->conf->csa_active || res) { 1819 /* disregard subsequent announcements if already processing */ 1820 return; 1821 } 1822 1823 if (link->conf->chandef.chan->band != 1824 csa_ie.chandef.chan->band) { 1825 sdata_info(sdata, 1826 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1827 link->u.mgd.bssid, 1828 csa_ie.chandef.chan->center_freq, 1829 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1830 csa_ie.chandef.center_freq2); 1831 goto lock_and_drop_connection; 1832 } 1833 1834 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1835 IEEE80211_CHAN_DISABLED)) { 1836 sdata_info(sdata, 1837 "AP %pM switches to unsupported channel " 1838 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1839 "disconnecting\n", 1840 link->u.mgd.bssid, 1841 csa_ie.chandef.chan->center_freq, 1842 csa_ie.chandef.chan->freq_offset, 1843 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1844 csa_ie.chandef.freq1_offset, 1845 csa_ie.chandef.center_freq2); 1846 goto lock_and_drop_connection; 1847 } 1848 1849 if (cfg80211_chandef_identical(&csa_ie.chandef, 1850 &link->conf->chandef) && 1851 (!csa_ie.mode || !beacon)) { 1852 if (link->u.mgd.csa_ignored_same_chan) 1853 return; 1854 sdata_info(sdata, 1855 "AP %pM tries to chanswitch to same channel, ignore\n", 1856 link->u.mgd.bssid); 1857 link->u.mgd.csa_ignored_same_chan = true; 1858 return; 1859 } 1860 1861 /* 1862 * Drop all TDLS peers - either we disconnect or move to a different 1863 * channel from this point on. There's no telling what our peer will do. 1864 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1865 * have an incompatible wider chandef. 1866 */ 1867 ieee80211_teardown_tdls_peers(sdata); 1868 1869 mutex_lock(&local->mtx); 1870 mutex_lock(&local->chanctx_mtx); 1871 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1872 lockdep_is_held(&local->chanctx_mtx)); 1873 if (!conf) { 1874 sdata_info(sdata, 1875 "no channel context assigned to vif?, disconnecting\n"); 1876 goto drop_connection; 1877 } 1878 1879 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1880 1881 if (local->use_chanctx && 1882 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1883 sdata_info(sdata, 1884 "driver doesn't support chan-switch with channel contexts\n"); 1885 goto drop_connection; 1886 } 1887 1888 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1889 sdata_info(sdata, 1890 "preparing for channel switch failed, disconnecting\n"); 1891 goto drop_connection; 1892 } 1893 1894 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chandef, 1895 chanctx->mode, false); 1896 if (res) { 1897 sdata_info(sdata, 1898 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1899 res); 1900 goto drop_connection; 1901 } 1902 mutex_unlock(&local->chanctx_mtx); 1903 1904 link->conf->csa_active = true; 1905 link->csa_chandef = csa_ie.chandef; 1906 link->csa_block_tx = csa_ie.mode; 1907 link->u.mgd.csa_ignored_same_chan = false; 1908 link->u.mgd.beacon_crc_valid = false; 1909 1910 if (link->csa_block_tx) 1911 ieee80211_stop_vif_queues(local, sdata, 1912 IEEE80211_QUEUE_STOP_REASON_CSA); 1913 mutex_unlock(&local->mtx); 1914 1915 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 0, 1916 csa_ie.count, csa_ie.mode); 1917 1918 if (local->ops->channel_switch) { 1919 /* use driver's channel switch callback */ 1920 drv_channel_switch(local, sdata, &ch_switch); 1921 return; 1922 } 1923 1924 /* channel switch handled in software */ 1925 if (csa_ie.count <= 1) 1926 ieee80211_queue_work(&local->hw, &link->u.mgd.chswitch_work); 1927 else 1928 mod_timer(&link->u.mgd.chswitch_timer, 1929 TU_TO_EXP_TIME((csa_ie.count - 1) * 1930 cbss->beacon_interval)); 1931 return; 1932 lock_and_drop_connection: 1933 mutex_lock(&local->mtx); 1934 mutex_lock(&local->chanctx_mtx); 1935 drop_connection: 1936 /* 1937 * This is just so that the disconnect flow will know that 1938 * we were trying to switch channel and failed. In case the 1939 * mode is 1 (we are not allowed to Tx), we will know not to 1940 * send a deauthentication frame. Those two fields will be 1941 * reset when the disconnection worker runs. 1942 */ 1943 link->conf->csa_active = true; 1944 link->csa_block_tx = csa_ie.mode; 1945 1946 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1947 mutex_unlock(&local->chanctx_mtx); 1948 mutex_unlock(&local->mtx); 1949 } 1950 1951 static bool 1952 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1953 struct ieee80211_channel *channel, 1954 const u8 *country_ie, u8 country_ie_len, 1955 const u8 *pwr_constr_elem, 1956 int *chan_pwr, int *pwr_reduction) 1957 { 1958 struct ieee80211_country_ie_triplet *triplet; 1959 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1960 int i, chan_increment; 1961 bool have_chan_pwr = false; 1962 1963 /* Invalid IE */ 1964 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1965 return false; 1966 1967 triplet = (void *)(country_ie + 3); 1968 country_ie_len -= 3; 1969 1970 switch (channel->band) { 1971 default: 1972 WARN_ON_ONCE(1); 1973 fallthrough; 1974 case NL80211_BAND_2GHZ: 1975 case NL80211_BAND_60GHZ: 1976 case NL80211_BAND_LC: 1977 chan_increment = 1; 1978 break; 1979 case NL80211_BAND_5GHZ: 1980 chan_increment = 4; 1981 break; 1982 case NL80211_BAND_6GHZ: 1983 /* 1984 * In the 6 GHz band, the "maximum transmit power level" 1985 * field in the triplets is reserved, and thus will be 1986 * zero and we shouldn't use it to control TX power. 1987 * The actual TX power will be given in the transmit 1988 * power envelope element instead. 1989 */ 1990 return false; 1991 } 1992 1993 /* find channel */ 1994 while (country_ie_len >= 3) { 1995 u8 first_channel = triplet->chans.first_channel; 1996 1997 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1998 goto next; 1999 2000 for (i = 0; i < triplet->chans.num_channels; i++) { 2001 if (first_channel + i * chan_increment == chan) { 2002 have_chan_pwr = true; 2003 *chan_pwr = triplet->chans.max_power; 2004 break; 2005 } 2006 } 2007 if (have_chan_pwr) 2008 break; 2009 2010 next: 2011 triplet++; 2012 country_ie_len -= 3; 2013 } 2014 2015 if (have_chan_pwr && pwr_constr_elem) 2016 *pwr_reduction = *pwr_constr_elem; 2017 else 2018 *pwr_reduction = 0; 2019 2020 return have_chan_pwr; 2021 } 2022 2023 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2024 struct ieee80211_channel *channel, 2025 const u8 *cisco_dtpc_ie, 2026 int *pwr_level) 2027 { 2028 /* From practical testing, the first data byte of the DTPC element 2029 * seems to contain the requested dBm level, and the CLI on Cisco 2030 * APs clearly state the range is -127 to 127 dBm, which indicates 2031 * a signed byte, although it seemingly never actually goes negative. 2032 * The other byte seems to always be zero. 2033 */ 2034 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2035 } 2036 2037 static u32 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2038 struct ieee80211_channel *channel, 2039 struct ieee80211_mgmt *mgmt, 2040 const u8 *country_ie, u8 country_ie_len, 2041 const u8 *pwr_constr_ie, 2042 const u8 *cisco_dtpc_ie) 2043 { 2044 struct ieee80211_sub_if_data *sdata = link->sdata; 2045 bool has_80211h_pwr = false, has_cisco_pwr = false; 2046 int chan_pwr = 0, pwr_reduction_80211h = 0; 2047 int pwr_level_cisco, pwr_level_80211h; 2048 int new_ap_level; 2049 __le16 capab = mgmt->u.probe_resp.capab_info; 2050 2051 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2052 return 0; /* TODO */ 2053 2054 if (country_ie && 2055 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2056 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2057 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2058 sdata, channel, country_ie, country_ie_len, 2059 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2060 pwr_level_80211h = 2061 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2062 } 2063 2064 if (cisco_dtpc_ie) { 2065 ieee80211_find_cisco_dtpc( 2066 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2067 has_cisco_pwr = true; 2068 } 2069 2070 if (!has_80211h_pwr && !has_cisco_pwr) 2071 return 0; 2072 2073 /* If we have both 802.11h and Cisco DTPC, apply both limits 2074 * by picking the smallest of the two power levels advertised. 2075 */ 2076 if (has_80211h_pwr && 2077 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2078 new_ap_level = pwr_level_80211h; 2079 2080 if (link->ap_power_level == new_ap_level) 2081 return 0; 2082 2083 sdata_dbg(sdata, 2084 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2085 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2086 link->u.mgd.bssid); 2087 } else { /* has_cisco_pwr is always true here. */ 2088 new_ap_level = pwr_level_cisco; 2089 2090 if (link->ap_power_level == new_ap_level) 2091 return 0; 2092 2093 sdata_dbg(sdata, 2094 "Limiting TX power to %d dBm as advertised by %pM\n", 2095 pwr_level_cisco, link->u.mgd.bssid); 2096 } 2097 2098 link->ap_power_level = new_ap_level; 2099 if (__ieee80211_recalc_txpower(sdata)) 2100 return BSS_CHANGED_TXPOWER; 2101 return 0; 2102 } 2103 2104 /* powersave */ 2105 static void ieee80211_enable_ps(struct ieee80211_local *local, 2106 struct ieee80211_sub_if_data *sdata) 2107 { 2108 struct ieee80211_conf *conf = &local->hw.conf; 2109 2110 /* 2111 * If we are scanning right now then the parameters will 2112 * take effect when scan finishes. 2113 */ 2114 if (local->scanning) 2115 return; 2116 2117 if (conf->dynamic_ps_timeout > 0 && 2118 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2119 mod_timer(&local->dynamic_ps_timer, jiffies + 2120 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2121 } else { 2122 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2123 ieee80211_send_nullfunc(local, sdata, true); 2124 2125 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2126 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2127 return; 2128 2129 conf->flags |= IEEE80211_CONF_PS; 2130 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2131 } 2132 } 2133 2134 static void ieee80211_change_ps(struct ieee80211_local *local) 2135 { 2136 struct ieee80211_conf *conf = &local->hw.conf; 2137 2138 if (local->ps_sdata) { 2139 ieee80211_enable_ps(local, local->ps_sdata); 2140 } else if (conf->flags & IEEE80211_CONF_PS) { 2141 conf->flags &= ~IEEE80211_CONF_PS; 2142 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2143 del_timer_sync(&local->dynamic_ps_timer); 2144 cancel_work_sync(&local->dynamic_ps_enable_work); 2145 } 2146 } 2147 2148 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2149 { 2150 struct ieee80211_local *local = sdata->local; 2151 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2152 struct sta_info *sta = NULL; 2153 bool authorized = false; 2154 2155 if (!mgd->powersave) 2156 return false; 2157 2158 if (mgd->broken_ap) 2159 return false; 2160 2161 if (!mgd->associated) 2162 return false; 2163 2164 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2165 return false; 2166 2167 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2168 !sdata->deflink.u.mgd.have_beacon) 2169 return false; 2170 2171 rcu_read_lock(); 2172 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2173 if (sta) 2174 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2175 rcu_read_unlock(); 2176 2177 return authorized; 2178 } 2179 2180 /* need to hold RTNL or interface lock */ 2181 void ieee80211_recalc_ps(struct ieee80211_local *local) 2182 { 2183 struct ieee80211_sub_if_data *sdata, *found = NULL; 2184 int count = 0; 2185 int timeout; 2186 2187 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2188 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2189 local->ps_sdata = NULL; 2190 return; 2191 } 2192 2193 list_for_each_entry(sdata, &local->interfaces, list) { 2194 if (!ieee80211_sdata_running(sdata)) 2195 continue; 2196 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2197 /* If an AP vif is found, then disable PS 2198 * by setting the count to zero thereby setting 2199 * ps_sdata to NULL. 2200 */ 2201 count = 0; 2202 break; 2203 } 2204 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2205 continue; 2206 found = sdata; 2207 count++; 2208 } 2209 2210 if (count == 1 && ieee80211_powersave_allowed(found)) { 2211 u8 dtimper = found->deflink.u.mgd.dtim_period; 2212 2213 timeout = local->dynamic_ps_forced_timeout; 2214 if (timeout < 0) 2215 timeout = 100; 2216 local->hw.conf.dynamic_ps_timeout = timeout; 2217 2218 /* If the TIM IE is invalid, pretend the value is 1 */ 2219 if (!dtimper) 2220 dtimper = 1; 2221 2222 local->hw.conf.ps_dtim_period = dtimper; 2223 local->ps_sdata = found; 2224 } else { 2225 local->ps_sdata = NULL; 2226 } 2227 2228 ieee80211_change_ps(local); 2229 } 2230 2231 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2232 { 2233 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2234 2235 if (sdata->vif.cfg.ps != ps_allowed) { 2236 sdata->vif.cfg.ps = ps_allowed; 2237 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2238 } 2239 } 2240 2241 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 2242 { 2243 struct ieee80211_local *local = 2244 container_of(work, struct ieee80211_local, 2245 dynamic_ps_disable_work); 2246 2247 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2248 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2249 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2250 } 2251 2252 ieee80211_wake_queues_by_reason(&local->hw, 2253 IEEE80211_MAX_QUEUE_MAP, 2254 IEEE80211_QUEUE_STOP_REASON_PS, 2255 false); 2256 } 2257 2258 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 2259 { 2260 struct ieee80211_local *local = 2261 container_of(work, struct ieee80211_local, 2262 dynamic_ps_enable_work); 2263 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2264 struct ieee80211_if_managed *ifmgd; 2265 unsigned long flags; 2266 int q; 2267 2268 /* can only happen when PS was just disabled anyway */ 2269 if (!sdata) 2270 return; 2271 2272 ifmgd = &sdata->u.mgd; 2273 2274 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2275 return; 2276 2277 if (local->hw.conf.dynamic_ps_timeout > 0) { 2278 /* don't enter PS if TX frames are pending */ 2279 if (drv_tx_frames_pending(local)) { 2280 mod_timer(&local->dynamic_ps_timer, jiffies + 2281 msecs_to_jiffies( 2282 local->hw.conf.dynamic_ps_timeout)); 2283 return; 2284 } 2285 2286 /* 2287 * transmission can be stopped by others which leads to 2288 * dynamic_ps_timer expiry. Postpone the ps timer if it 2289 * is not the actual idle state. 2290 */ 2291 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2292 for (q = 0; q < local->hw.queues; q++) { 2293 if (local->queue_stop_reasons[q]) { 2294 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2295 flags); 2296 mod_timer(&local->dynamic_ps_timer, jiffies + 2297 msecs_to_jiffies( 2298 local->hw.conf.dynamic_ps_timeout)); 2299 return; 2300 } 2301 } 2302 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2303 } 2304 2305 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2306 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2307 if (drv_tx_frames_pending(local)) { 2308 mod_timer(&local->dynamic_ps_timer, jiffies + 2309 msecs_to_jiffies( 2310 local->hw.conf.dynamic_ps_timeout)); 2311 } else { 2312 ieee80211_send_nullfunc(local, sdata, true); 2313 /* Flush to get the tx status of nullfunc frame */ 2314 ieee80211_flush_queues(local, sdata, false); 2315 } 2316 } 2317 2318 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2319 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2320 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2321 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2322 local->hw.conf.flags |= IEEE80211_CONF_PS; 2323 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2324 } 2325 } 2326 2327 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2328 { 2329 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2330 2331 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 2332 } 2333 2334 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 2335 { 2336 struct delayed_work *delayed_work = to_delayed_work(work); 2337 struct ieee80211_link_data *link = 2338 container_of(delayed_work, struct ieee80211_link_data, 2339 dfs_cac_timer_work); 2340 struct cfg80211_chan_def chandef = link->conf->chandef; 2341 struct ieee80211_sub_if_data *sdata = link->sdata; 2342 2343 mutex_lock(&sdata->local->mtx); 2344 if (sdata->wdev.cac_started) { 2345 ieee80211_link_release_channel(link); 2346 cfg80211_cac_event(sdata->dev, &chandef, 2347 NL80211_RADAR_CAC_FINISHED, 2348 GFP_KERNEL); 2349 } 2350 mutex_unlock(&sdata->local->mtx); 2351 } 2352 2353 static bool 2354 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2355 { 2356 struct ieee80211_local *local = sdata->local; 2357 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2358 bool ret = false; 2359 int ac; 2360 2361 if (local->hw.queues < IEEE80211_NUM_ACS) 2362 return false; 2363 2364 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2365 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2366 int non_acm_ac; 2367 unsigned long now = jiffies; 2368 2369 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2370 tx_tspec->admitted_time && 2371 time_after(now, tx_tspec->time_slice_start + HZ)) { 2372 tx_tspec->consumed_tx_time = 0; 2373 tx_tspec->time_slice_start = now; 2374 2375 if (tx_tspec->downgraded) 2376 tx_tspec->action = 2377 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2378 } 2379 2380 switch (tx_tspec->action) { 2381 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2382 /* take the original parameters */ 2383 if (drv_conf_tx(local, &sdata->deflink, ac, 2384 &sdata->deflink.tx_conf[ac])) 2385 link_err(&sdata->deflink, 2386 "failed to set TX queue parameters for queue %d\n", 2387 ac); 2388 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2389 tx_tspec->downgraded = false; 2390 ret = true; 2391 break; 2392 case TX_TSPEC_ACTION_DOWNGRADE: 2393 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2394 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2395 ret = true; 2396 break; 2397 } 2398 /* downgrade next lower non-ACM AC */ 2399 for (non_acm_ac = ac + 1; 2400 non_acm_ac < IEEE80211_NUM_ACS; 2401 non_acm_ac++) 2402 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2403 break; 2404 /* Usually the loop will result in using BK even if it 2405 * requires admission control, but such a configuration 2406 * makes no sense and we have to transmit somehow - the 2407 * AC selection does the same thing. 2408 * If we started out trying to downgrade from BK, then 2409 * the extra condition here might be needed. 2410 */ 2411 if (non_acm_ac >= IEEE80211_NUM_ACS) 2412 non_acm_ac = IEEE80211_AC_BK; 2413 if (drv_conf_tx(local, &sdata->deflink, ac, 2414 &sdata->deflink.tx_conf[non_acm_ac])) 2415 link_err(&sdata->deflink, 2416 "failed to set TX queue parameters for queue %d\n", 2417 ac); 2418 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2419 ret = true; 2420 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2421 tx_tspec->time_slice_start + HZ - now + 1); 2422 break; 2423 case TX_TSPEC_ACTION_NONE: 2424 /* nothing now */ 2425 break; 2426 } 2427 } 2428 2429 return ret; 2430 } 2431 2432 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2433 { 2434 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2435 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2436 BSS_CHANGED_QOS); 2437 } 2438 2439 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2440 { 2441 struct ieee80211_sub_if_data *sdata; 2442 2443 sdata = container_of(work, struct ieee80211_sub_if_data, 2444 u.mgd.tx_tspec_wk.work); 2445 ieee80211_sta_handle_tspec_ac_params(sdata); 2446 } 2447 2448 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2449 { 2450 struct ieee80211_sub_if_data *sdata = link->sdata; 2451 struct ieee80211_local *local = sdata->local; 2452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2453 struct ieee80211_tx_queue_params *params = link->tx_conf; 2454 u8 ac; 2455 2456 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2457 mlme_dbg(sdata, 2458 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2459 ac, params[ac].acm, 2460 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2461 params[ac].txop, params[ac].uapsd, 2462 ifmgd->tx_tspec[ac].downgraded); 2463 if (!ifmgd->tx_tspec[ac].downgraded && 2464 drv_conf_tx(local, link, ac, ¶ms[ac])) 2465 link_err(link, 2466 "failed to set TX queue parameters for AC %d\n", 2467 ac); 2468 } 2469 } 2470 2471 /* MLME */ 2472 static bool 2473 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2474 struct ieee80211_link_data *link, 2475 const u8 *wmm_param, size_t wmm_param_len, 2476 const struct ieee80211_mu_edca_param_set *mu_edca) 2477 { 2478 struct ieee80211_sub_if_data *sdata = link->sdata; 2479 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2481 size_t left; 2482 int count, mu_edca_count, ac; 2483 const u8 *pos; 2484 u8 uapsd_queues = 0; 2485 2486 if (!local->ops->conf_tx) 2487 return false; 2488 2489 if (local->hw.queues < IEEE80211_NUM_ACS) 2490 return false; 2491 2492 if (!wmm_param) 2493 return false; 2494 2495 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2496 return false; 2497 2498 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2499 uapsd_queues = ifmgd->uapsd_queues; 2500 2501 count = wmm_param[6] & 0x0f; 2502 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2503 * if mu_edca was preset before and now it disappeared tell 2504 * the driver about it. 2505 */ 2506 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2507 if (count == link->u.mgd.wmm_last_param_set && 2508 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2509 return false; 2510 link->u.mgd.wmm_last_param_set = count; 2511 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2512 2513 pos = wmm_param + 8; 2514 left = wmm_param_len - 8; 2515 2516 memset(¶ms, 0, sizeof(params)); 2517 2518 sdata->wmm_acm = 0; 2519 for (; left >= 4; left -= 4, pos += 4) { 2520 int aci = (pos[0] >> 5) & 0x03; 2521 int acm = (pos[0] >> 4) & 0x01; 2522 bool uapsd = false; 2523 2524 switch (aci) { 2525 case 1: /* AC_BK */ 2526 ac = IEEE80211_AC_BK; 2527 if (acm) 2528 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2529 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2530 uapsd = true; 2531 params[ac].mu_edca = !!mu_edca; 2532 if (mu_edca) 2533 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2534 break; 2535 case 2: /* AC_VI */ 2536 ac = IEEE80211_AC_VI; 2537 if (acm) 2538 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2539 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2540 uapsd = true; 2541 params[ac].mu_edca = !!mu_edca; 2542 if (mu_edca) 2543 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2544 break; 2545 case 3: /* AC_VO */ 2546 ac = IEEE80211_AC_VO; 2547 if (acm) 2548 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2549 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2550 uapsd = true; 2551 params[ac].mu_edca = !!mu_edca; 2552 if (mu_edca) 2553 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2554 break; 2555 case 0: /* AC_BE */ 2556 default: 2557 ac = IEEE80211_AC_BE; 2558 if (acm) 2559 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2560 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2561 uapsd = true; 2562 params[ac].mu_edca = !!mu_edca; 2563 if (mu_edca) 2564 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2565 break; 2566 } 2567 2568 params[ac].aifs = pos[0] & 0x0f; 2569 2570 if (params[ac].aifs < 2) { 2571 sdata_info(sdata, 2572 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2573 params[ac].aifs, aci); 2574 params[ac].aifs = 2; 2575 } 2576 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2577 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2578 params[ac].txop = get_unaligned_le16(pos + 2); 2579 params[ac].acm = acm; 2580 params[ac].uapsd = uapsd; 2581 2582 if (params[ac].cw_min == 0 || 2583 params[ac].cw_min > params[ac].cw_max) { 2584 sdata_info(sdata, 2585 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2586 params[ac].cw_min, params[ac].cw_max, aci); 2587 return false; 2588 } 2589 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2590 } 2591 2592 /* WMM specification requires all 4 ACIs. */ 2593 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2594 if (params[ac].cw_min == 0) { 2595 sdata_info(sdata, 2596 "AP has invalid WMM params (missing AC %d), using defaults\n", 2597 ac); 2598 return false; 2599 } 2600 } 2601 2602 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2603 link->tx_conf[ac] = params[ac]; 2604 2605 ieee80211_mgd_set_link_qos_params(link); 2606 2607 /* enable WMM or activate new settings */ 2608 link->conf->qos = true; 2609 return true; 2610 } 2611 2612 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2613 { 2614 lockdep_assert_held(&sdata->local->mtx); 2615 2616 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2617 ieee80211_run_deferred_scan(sdata->local); 2618 } 2619 2620 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2621 { 2622 mutex_lock(&sdata->local->mtx); 2623 __ieee80211_stop_poll(sdata); 2624 mutex_unlock(&sdata->local->mtx); 2625 } 2626 2627 static u32 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2628 u16 capab, bool erp_valid, u8 erp) 2629 { 2630 struct ieee80211_bss_conf *bss_conf = link->conf; 2631 struct ieee80211_supported_band *sband; 2632 u32 changed = 0; 2633 bool use_protection; 2634 bool use_short_preamble; 2635 bool use_short_slot; 2636 2637 sband = ieee80211_get_link_sband(link); 2638 if (!sband) 2639 return changed; 2640 2641 if (erp_valid) { 2642 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2643 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2644 } else { 2645 use_protection = false; 2646 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2647 } 2648 2649 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2650 if (sband->band == NL80211_BAND_5GHZ || 2651 sband->band == NL80211_BAND_6GHZ) 2652 use_short_slot = true; 2653 2654 if (use_protection != bss_conf->use_cts_prot) { 2655 bss_conf->use_cts_prot = use_protection; 2656 changed |= BSS_CHANGED_ERP_CTS_PROT; 2657 } 2658 2659 if (use_short_preamble != bss_conf->use_short_preamble) { 2660 bss_conf->use_short_preamble = use_short_preamble; 2661 changed |= BSS_CHANGED_ERP_PREAMBLE; 2662 } 2663 2664 if (use_short_slot != bss_conf->use_short_slot) { 2665 bss_conf->use_short_slot = use_short_slot; 2666 changed |= BSS_CHANGED_ERP_SLOT; 2667 } 2668 2669 return changed; 2670 } 2671 2672 static u32 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2673 struct cfg80211_bss *cbss) 2674 { 2675 struct ieee80211_sub_if_data *sdata = link->sdata; 2676 struct ieee80211_bss_conf *bss_conf = link->conf; 2677 struct ieee80211_bss *bss = (void *)cbss->priv; 2678 u32 changed = BSS_CHANGED_QOS; 2679 2680 /* not really used in MLO */ 2681 sdata->u.mgd.beacon_timeout = 2682 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2683 bss_conf->beacon_int)); 2684 2685 changed |= ieee80211_handle_bss_capability(link, 2686 bss_conf->assoc_capability, 2687 bss->has_erp_value, 2688 bss->erp_value); 2689 2690 ieee80211_check_rate_mask(link); 2691 2692 link->u.mgd.bss = cbss; 2693 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2694 2695 if (sdata->vif.p2p || 2696 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2697 const struct cfg80211_bss_ies *ies; 2698 2699 rcu_read_lock(); 2700 ies = rcu_dereference(cbss->ies); 2701 if (ies) { 2702 int ret; 2703 2704 ret = cfg80211_get_p2p_attr( 2705 ies->data, ies->len, 2706 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2707 (u8 *) &bss_conf->p2p_noa_attr, 2708 sizeof(bss_conf->p2p_noa_attr)); 2709 if (ret >= 2) { 2710 link->u.mgd.p2p_noa_index = 2711 bss_conf->p2p_noa_attr.index; 2712 changed |= BSS_CHANGED_P2P_PS; 2713 } 2714 } 2715 rcu_read_unlock(); 2716 } 2717 2718 if (link->u.mgd.have_beacon) { 2719 /* 2720 * If the AP is buggy we may get here with no DTIM period 2721 * known, so assume it's 1 which is the only safe assumption 2722 * in that case, although if the TIM IE is broken powersave 2723 * probably just won't work at all. 2724 */ 2725 bss_conf->dtim_period = link->u.mgd.dtim_period ?: 1; 2726 bss_conf->beacon_rate = bss->beacon_rate; 2727 changed |= BSS_CHANGED_BEACON_INFO; 2728 } else { 2729 bss_conf->beacon_rate = NULL; 2730 bss_conf->dtim_period = 0; 2731 } 2732 2733 /* Tell the driver to monitor connection quality (if supported) */ 2734 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2735 bss_conf->cqm_rssi_thold) 2736 changed |= BSS_CHANGED_CQM; 2737 2738 return changed; 2739 } 2740 2741 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2742 struct ieee80211_mgd_assoc_data *assoc_data, 2743 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2744 { 2745 struct ieee80211_local *local = sdata->local; 2746 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2747 u64 vif_changed = BSS_CHANGED_ASSOC; 2748 unsigned int link_id; 2749 2750 sdata->u.mgd.associated = true; 2751 2752 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2753 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2754 struct ieee80211_link_data *link; 2755 2756 if (!cbss) 2757 continue; 2758 2759 link = sdata_dereference(sdata->link[link_id], sdata); 2760 if (WARN_ON(!link)) 2761 return; 2762 2763 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 2764 } 2765 2766 /* just to be sure */ 2767 ieee80211_stop_poll(sdata); 2768 2769 ieee80211_led_assoc(local, 1); 2770 2771 vif_cfg->assoc = 1; 2772 2773 /* Enable ARP filtering */ 2774 if (vif_cfg->arp_addr_cnt) 2775 vif_changed |= BSS_CHANGED_ARP_FILTER; 2776 2777 if (sdata->vif.valid_links) { 2778 for (link_id = 0; 2779 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 2780 link_id++) { 2781 struct ieee80211_link_data *link; 2782 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2783 2784 if (!cbss) 2785 continue; 2786 2787 link = sdata_dereference(sdata->link[link_id], sdata); 2788 if (WARN_ON(!link)) 2789 return; 2790 2791 ieee80211_link_info_change_notify(sdata, link, 2792 changed[link_id]); 2793 2794 ieee80211_recalc_smps(sdata, link); 2795 } 2796 2797 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 2798 } else { 2799 ieee80211_bss_info_change_notify(sdata, 2800 vif_changed | changed[0]); 2801 } 2802 2803 mutex_lock(&local->iflist_mtx); 2804 ieee80211_recalc_ps(local); 2805 mutex_unlock(&local->iflist_mtx); 2806 2807 /* leave this here to not change ordering in non-MLO cases */ 2808 if (!sdata->vif.valid_links) 2809 ieee80211_recalc_smps(sdata, &sdata->deflink); 2810 ieee80211_recalc_ps_vif(sdata); 2811 2812 netif_carrier_on(sdata->dev); 2813 } 2814 2815 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2816 u16 stype, u16 reason, bool tx, 2817 u8 *frame_buf) 2818 { 2819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2820 struct ieee80211_local *local = sdata->local; 2821 unsigned int link_id; 2822 u32 changed = 0; 2823 struct ieee80211_prep_tx_info info = { 2824 .subtype = stype, 2825 }; 2826 2827 sdata_assert_lock(sdata); 2828 2829 if (WARN_ON_ONCE(tx && !frame_buf)) 2830 return; 2831 2832 if (WARN_ON(!ifmgd->associated)) 2833 return; 2834 2835 ieee80211_stop_poll(sdata); 2836 2837 ifmgd->associated = false; 2838 2839 /* other links will be destroyed */ 2840 sdata->deflink.u.mgd.bss = NULL; 2841 2842 netif_carrier_off(sdata->dev); 2843 2844 /* 2845 * if we want to get out of ps before disassoc (why?) we have 2846 * to do it before sending disassoc, as otherwise the null-packet 2847 * won't be valid. 2848 */ 2849 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2850 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2851 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2852 } 2853 local->ps_sdata = NULL; 2854 2855 /* disable per-vif ps */ 2856 ieee80211_recalc_ps_vif(sdata); 2857 2858 /* make sure ongoing transmission finishes */ 2859 synchronize_net(); 2860 2861 /* 2862 * drop any frame before deauth/disassoc, this can be data or 2863 * management frame. Since we are disconnecting, we should not 2864 * insist sending these frames which can take time and delay 2865 * the disconnection and possible the roaming. 2866 */ 2867 if (tx) 2868 ieee80211_flush_queues(local, sdata, true); 2869 2870 /* deauthenticate/disassociate now */ 2871 if (tx || frame_buf) { 2872 /* 2873 * In multi channel scenarios guarantee that the virtual 2874 * interface is granted immediate airtime to transmit the 2875 * deauthentication frame by calling mgd_prepare_tx, if the 2876 * driver requested so. 2877 */ 2878 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2879 !sdata->deflink.u.mgd.have_beacon) { 2880 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2881 } 2882 2883 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 2884 sdata->vif.cfg.ap_addr, stype, 2885 reason, tx, frame_buf); 2886 } 2887 2888 /* flush out frame - make sure the deauth was actually sent */ 2889 if (tx) 2890 ieee80211_flush_queues(local, sdata, false); 2891 2892 drv_mgd_complete_tx(sdata->local, sdata, &info); 2893 2894 /* clear AP addr only after building the needed mgmt frames */ 2895 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2896 eth_zero_addr(sdata->vif.cfg.ap_addr); 2897 2898 sdata->vif.cfg.ssid_len = 0; 2899 2900 /* remove AP and TDLS peers */ 2901 sta_info_flush(sdata); 2902 2903 /* finally reset all BSS / config parameters */ 2904 if (!sdata->vif.valid_links) 2905 changed |= ieee80211_reset_erp_info(sdata); 2906 2907 ieee80211_led_assoc(local, 0); 2908 changed |= BSS_CHANGED_ASSOC; 2909 sdata->vif.cfg.assoc = false; 2910 2911 sdata->deflink.u.mgd.p2p_noa_index = -1; 2912 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2913 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2914 2915 /* on the next assoc, re-program HT/VHT parameters */ 2916 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2917 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2918 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2919 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2920 2921 /* 2922 * reset MU-MIMO ownership and group data in default link, 2923 * if used, other links are destroyed 2924 */ 2925 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2926 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2927 memset(sdata->vif.bss_conf.mu_group.position, 0, 2928 sizeof(sdata->vif.bss_conf.mu_group.position)); 2929 if (!sdata->vif.valid_links) 2930 changed |= BSS_CHANGED_MU_GROUPS; 2931 sdata->vif.bss_conf.mu_mimo_owner = false; 2932 2933 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2934 2935 del_timer_sync(&local->dynamic_ps_timer); 2936 cancel_work_sync(&local->dynamic_ps_enable_work); 2937 2938 /* Disable ARP filtering */ 2939 if (sdata->vif.cfg.arp_addr_cnt) 2940 changed |= BSS_CHANGED_ARP_FILTER; 2941 2942 sdata->vif.bss_conf.qos = false; 2943 if (!sdata->vif.valid_links) { 2944 changed |= BSS_CHANGED_QOS; 2945 /* The BSSID (not really interesting) and HT changed */ 2946 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2947 ieee80211_bss_info_change_notify(sdata, changed); 2948 } else { 2949 ieee80211_vif_cfg_change_notify(sdata, changed); 2950 } 2951 2952 /* disassociated - set to defaults now */ 2953 ieee80211_set_wmm_default(&sdata->deflink, false, false); 2954 2955 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2956 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2957 del_timer_sync(&sdata->u.mgd.timer); 2958 del_timer_sync(&sdata->deflink.u.mgd.chswitch_timer); 2959 2960 sdata->vif.bss_conf.dtim_period = 0; 2961 sdata->vif.bss_conf.beacon_rate = NULL; 2962 2963 sdata->deflink.u.mgd.have_beacon = false; 2964 sdata->deflink.u.mgd.tracking_signal_avg = false; 2965 sdata->deflink.u.mgd.disable_wmm_tracking = false; 2966 2967 ifmgd->flags = 0; 2968 sdata->deflink.u.mgd.conn_flags = 0; 2969 mutex_lock(&local->mtx); 2970 2971 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 2972 struct ieee80211_link_data *link; 2973 2974 link = sdata_dereference(sdata->link[link_id], sdata); 2975 if (!link) 2976 continue; 2977 ieee80211_link_release_channel(link); 2978 } 2979 2980 sdata->vif.bss_conf.csa_active = false; 2981 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2982 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 2983 if (sdata->deflink.csa_block_tx) { 2984 ieee80211_wake_vif_queues(local, sdata, 2985 IEEE80211_QUEUE_STOP_REASON_CSA); 2986 sdata->deflink.csa_block_tx = false; 2987 } 2988 mutex_unlock(&local->mtx); 2989 2990 /* existing TX TSPEC sessions no longer exist */ 2991 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2992 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2993 2994 sdata->vif.bss_conf.pwr_reduction = 0; 2995 sdata->vif.bss_conf.tx_pwr_env_num = 0; 2996 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 2997 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 2998 2999 ieee80211_vif_set_links(sdata, 0); 3000 } 3001 3002 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3003 { 3004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3005 struct ieee80211_local *local = sdata->local; 3006 3007 mutex_lock(&local->mtx); 3008 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3009 goto out; 3010 3011 __ieee80211_stop_poll(sdata); 3012 3013 mutex_lock(&local->iflist_mtx); 3014 ieee80211_recalc_ps(local); 3015 mutex_unlock(&local->iflist_mtx); 3016 3017 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3018 goto out; 3019 3020 /* 3021 * We've received a probe response, but are not sure whether 3022 * we have or will be receiving any beacons or data, so let's 3023 * schedule the timers again, just in case. 3024 */ 3025 ieee80211_sta_reset_beacon_monitor(sdata); 3026 3027 mod_timer(&ifmgd->conn_mon_timer, 3028 round_jiffies_up(jiffies + 3029 IEEE80211_CONNECTION_IDLE_TIME)); 3030 out: 3031 mutex_unlock(&local->mtx); 3032 } 3033 3034 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3035 struct ieee80211_hdr *hdr, 3036 u16 tx_time) 3037 { 3038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3039 u16 tid; 3040 int ac; 3041 struct ieee80211_sta_tx_tspec *tx_tspec; 3042 unsigned long now = jiffies; 3043 3044 if (!ieee80211_is_data_qos(hdr->frame_control)) 3045 return; 3046 3047 tid = ieee80211_get_tid(hdr); 3048 ac = ieee80211_ac_from_tid(tid); 3049 tx_tspec = &ifmgd->tx_tspec[ac]; 3050 3051 if (likely(!tx_tspec->admitted_time)) 3052 return; 3053 3054 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3055 tx_tspec->consumed_tx_time = 0; 3056 tx_tspec->time_slice_start = now; 3057 3058 if (tx_tspec->downgraded) { 3059 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3060 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3061 } 3062 } 3063 3064 if (tx_tspec->downgraded) 3065 return; 3066 3067 tx_tspec->consumed_tx_time += tx_time; 3068 3069 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3070 tx_tspec->downgraded = true; 3071 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3072 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 3073 } 3074 } 3075 3076 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3077 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3078 { 3079 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3080 3081 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3082 !sdata->u.mgd.probe_send_count) 3083 return; 3084 3085 if (ack) 3086 sdata->u.mgd.probe_send_count = 0; 3087 else 3088 sdata->u.mgd.nullfunc_failed = true; 3089 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3090 } 3091 3092 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3093 const u8 *src, const u8 *dst, 3094 const u8 *ssid, size_t ssid_len, 3095 struct ieee80211_channel *channel) 3096 { 3097 struct sk_buff *skb; 3098 3099 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3100 ssid, ssid_len, NULL, 0, 3101 IEEE80211_PROBE_FLAG_DIRECTED); 3102 if (skb) 3103 ieee80211_tx_skb(sdata, skb); 3104 } 3105 3106 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3107 { 3108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3109 u8 *dst = sdata->vif.cfg.ap_addr; 3110 u8 unicast_limit = max(1, max_probe_tries - 3); 3111 struct sta_info *sta; 3112 3113 if (WARN_ON(sdata->vif.valid_links)) 3114 return; 3115 3116 /* 3117 * Try sending broadcast probe requests for the last three 3118 * probe requests after the first ones failed since some 3119 * buggy APs only support broadcast probe requests. 3120 */ 3121 if (ifmgd->probe_send_count >= unicast_limit) 3122 dst = NULL; 3123 3124 /* 3125 * When the hardware reports an accurate Tx ACK status, it's 3126 * better to send a nullfunc frame instead of a probe request, 3127 * as it will kick us off the AP quickly if we aren't associated 3128 * anymore. The timeout will be reset if the frame is ACKed by 3129 * the AP. 3130 */ 3131 ifmgd->probe_send_count++; 3132 3133 if (dst) { 3134 mutex_lock(&sdata->local->sta_mtx); 3135 sta = sta_info_get(sdata, dst); 3136 if (!WARN_ON(!sta)) 3137 ieee80211_check_fast_rx(sta); 3138 mutex_unlock(&sdata->local->sta_mtx); 3139 } 3140 3141 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3142 ifmgd->nullfunc_failed = false; 3143 ieee80211_send_nullfunc(sdata->local, sdata, false); 3144 } else { 3145 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3146 sdata->vif.cfg.ssid, 3147 sdata->vif.cfg.ssid_len, 3148 sdata->deflink.u.mgd.bss->channel); 3149 } 3150 3151 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3152 run_again(sdata, ifmgd->probe_timeout); 3153 } 3154 3155 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3156 bool beacon) 3157 { 3158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3159 bool already = false; 3160 3161 if (WARN_ON(sdata->vif.valid_links)) 3162 return; 3163 3164 if (!ieee80211_sdata_running(sdata)) 3165 return; 3166 3167 sdata_lock(sdata); 3168 3169 if (!ifmgd->associated) 3170 goto out; 3171 3172 mutex_lock(&sdata->local->mtx); 3173 3174 if (sdata->local->tmp_channel || sdata->local->scanning) { 3175 mutex_unlock(&sdata->local->mtx); 3176 goto out; 3177 } 3178 3179 if (sdata->local->suspending) { 3180 /* reschedule after resume */ 3181 mutex_unlock(&sdata->local->mtx); 3182 ieee80211_reset_ap_probe(sdata); 3183 goto out; 3184 } 3185 3186 if (beacon) { 3187 mlme_dbg_ratelimited(sdata, 3188 "detected beacon loss from AP (missed %d beacons) - probing\n", 3189 beacon_loss_count); 3190 3191 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3192 } 3193 3194 /* 3195 * The driver/our work has already reported this event or the 3196 * connection monitoring has kicked in and we have already sent 3197 * a probe request. Or maybe the AP died and the driver keeps 3198 * reporting until we disassociate... 3199 * 3200 * In either case we have to ignore the current call to this 3201 * function (except for setting the correct probe reason bit) 3202 * because otherwise we would reset the timer every time and 3203 * never check whether we received a probe response! 3204 */ 3205 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3206 already = true; 3207 3208 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3209 3210 mutex_unlock(&sdata->local->mtx); 3211 3212 if (already) 3213 goto out; 3214 3215 mutex_lock(&sdata->local->iflist_mtx); 3216 ieee80211_recalc_ps(sdata->local); 3217 mutex_unlock(&sdata->local->iflist_mtx); 3218 3219 ifmgd->probe_send_count = 0; 3220 ieee80211_mgd_probe_ap_send(sdata); 3221 out: 3222 sdata_unlock(sdata); 3223 } 3224 3225 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3226 struct ieee80211_vif *vif) 3227 { 3228 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3230 struct cfg80211_bss *cbss; 3231 struct sk_buff *skb; 3232 const struct element *ssid; 3233 int ssid_len; 3234 3235 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3236 sdata->vif.valid_links)) 3237 return NULL; 3238 3239 sdata_assert_lock(sdata); 3240 3241 if (ifmgd->associated) 3242 cbss = sdata->deflink.u.mgd.bss; 3243 else if (ifmgd->auth_data) 3244 cbss = ifmgd->auth_data->bss; 3245 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3246 cbss = ifmgd->assoc_data->link[0].bss; 3247 else 3248 return NULL; 3249 3250 rcu_read_lock(); 3251 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3252 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3253 "invalid SSID element (len=%d)", 3254 ssid ? ssid->datalen : -1)) 3255 ssid_len = 0; 3256 else 3257 ssid_len = ssid->datalen; 3258 3259 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3260 (u32) -1, cbss->channel, 3261 ssid->data, ssid_len, 3262 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3263 rcu_read_unlock(); 3264 3265 return skb; 3266 } 3267 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3268 3269 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3270 const u8 *buf, size_t len, bool tx, 3271 u16 reason, bool reconnect) 3272 { 3273 struct ieee80211_event event = { 3274 .type = MLME_EVENT, 3275 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3276 .u.mlme.reason = reason, 3277 }; 3278 3279 if (tx) 3280 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3281 else 3282 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3283 3284 drv_event_callback(sdata->local, sdata, &event); 3285 } 3286 3287 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3288 { 3289 struct ieee80211_local *local = sdata->local; 3290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3291 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3292 bool tx; 3293 3294 sdata_lock(sdata); 3295 if (!ifmgd->associated) { 3296 sdata_unlock(sdata); 3297 return; 3298 } 3299 3300 /* in MLO assume we have a link where we can TX the frame */ 3301 tx = sdata->vif.valid_links || !sdata->deflink.csa_block_tx; 3302 3303 if (!ifmgd->driver_disconnect) { 3304 unsigned int link_id; 3305 3306 /* 3307 * AP is probably out of range (or not reachable for another 3308 * reason) so remove the bss structs for that AP. In the case 3309 * of multi-link, it's not clear that all of them really are 3310 * out of range, but if they weren't the driver likely would 3311 * have switched to just have a single link active? 3312 */ 3313 for (link_id = 0; 3314 link_id < ARRAY_SIZE(sdata->link); 3315 link_id++) { 3316 struct ieee80211_link_data *link; 3317 3318 link = sdata_dereference(sdata->link[link_id], sdata); 3319 if (!link) 3320 continue; 3321 cfg80211_unlink_bss(local->hw.wiphy, link->u.mgd.bss); 3322 link->u.mgd.bss = NULL; 3323 } 3324 } 3325 3326 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3327 ifmgd->driver_disconnect ? 3328 WLAN_REASON_DEAUTH_LEAVING : 3329 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3330 tx, frame_buf); 3331 mutex_lock(&local->mtx); 3332 /* the other links will be destroyed */ 3333 sdata->vif.bss_conf.csa_active = false; 3334 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3335 if (sdata->deflink.csa_block_tx) { 3336 ieee80211_wake_vif_queues(local, sdata, 3337 IEEE80211_QUEUE_STOP_REASON_CSA); 3338 sdata->deflink.csa_block_tx = false; 3339 } 3340 mutex_unlock(&local->mtx); 3341 3342 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3343 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3344 ifmgd->reconnect); 3345 ifmgd->reconnect = false; 3346 3347 sdata_unlock(sdata); 3348 } 3349 3350 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 3351 { 3352 struct ieee80211_sub_if_data *sdata = 3353 container_of(work, struct ieee80211_sub_if_data, 3354 u.mgd.beacon_connection_loss_work); 3355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3356 3357 if (ifmgd->connection_loss) { 3358 sdata_info(sdata, "Connection to AP %pM lost\n", 3359 sdata->vif.cfg.ap_addr); 3360 __ieee80211_disconnect(sdata); 3361 ifmgd->connection_loss = false; 3362 } else if (ifmgd->driver_disconnect) { 3363 sdata_info(sdata, 3364 "Driver requested disconnection from AP %pM\n", 3365 sdata->vif.cfg.ap_addr); 3366 __ieee80211_disconnect(sdata); 3367 ifmgd->driver_disconnect = false; 3368 } else { 3369 if (ifmgd->associated) 3370 sdata->deflink.u.mgd.beacon_loss_count++; 3371 ieee80211_mgd_probe_ap(sdata, true); 3372 } 3373 } 3374 3375 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 3376 { 3377 struct ieee80211_sub_if_data *sdata = 3378 container_of(work, struct ieee80211_sub_if_data, 3379 u.mgd.csa_connection_drop_work); 3380 3381 __ieee80211_disconnect(sdata); 3382 } 3383 3384 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3385 { 3386 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3387 struct ieee80211_hw *hw = &sdata->local->hw; 3388 3389 trace_api_beacon_loss(sdata); 3390 3391 sdata->u.mgd.connection_loss = false; 3392 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3393 } 3394 EXPORT_SYMBOL(ieee80211_beacon_loss); 3395 3396 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3397 { 3398 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3399 struct ieee80211_hw *hw = &sdata->local->hw; 3400 3401 trace_api_connection_loss(sdata); 3402 3403 sdata->u.mgd.connection_loss = true; 3404 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3405 } 3406 EXPORT_SYMBOL(ieee80211_connection_loss); 3407 3408 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3409 { 3410 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3411 struct ieee80211_hw *hw = &sdata->local->hw; 3412 3413 trace_api_disconnect(sdata, reconnect); 3414 3415 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3416 return; 3417 3418 sdata->u.mgd.driver_disconnect = true; 3419 sdata->u.mgd.reconnect = reconnect; 3420 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 3421 } 3422 EXPORT_SYMBOL(ieee80211_disconnect); 3423 3424 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3425 bool assoc) 3426 { 3427 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3428 3429 sdata_assert_lock(sdata); 3430 3431 if (!assoc) { 3432 /* 3433 * we are not authenticated yet, the only timer that could be 3434 * running is the timeout for the authentication response which 3435 * which is not relevant anymore. 3436 */ 3437 del_timer_sync(&sdata->u.mgd.timer); 3438 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3439 3440 /* other links are destroyed */ 3441 sdata->deflink.u.mgd.conn_flags = 0; 3442 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3443 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3444 BSS_CHANGED_BSSID); 3445 sdata->u.mgd.flags = 0; 3446 3447 mutex_lock(&sdata->local->mtx); 3448 ieee80211_link_release_channel(&sdata->deflink); 3449 ieee80211_vif_set_links(sdata, 0); 3450 mutex_unlock(&sdata->local->mtx); 3451 } 3452 3453 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3454 kfree(auth_data); 3455 sdata->u.mgd.auth_data = NULL; 3456 } 3457 3458 enum assoc_status { 3459 ASSOC_SUCCESS, 3460 ASSOC_REJECTED, 3461 ASSOC_TIMEOUT, 3462 ASSOC_ABANDON, 3463 }; 3464 3465 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3466 enum assoc_status status) 3467 { 3468 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3469 3470 sdata_assert_lock(sdata); 3471 3472 if (status != ASSOC_SUCCESS) { 3473 /* 3474 * we are not associated yet, the only timer that could be 3475 * running is the timeout for the association response which 3476 * which is not relevant anymore. 3477 */ 3478 del_timer_sync(&sdata->u.mgd.timer); 3479 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3480 3481 sdata->deflink.u.mgd.conn_flags = 0; 3482 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3483 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3484 BSS_CHANGED_BSSID); 3485 sdata->u.mgd.flags = 0; 3486 sdata->vif.bss_conf.mu_mimo_owner = false; 3487 3488 if (status != ASSOC_REJECTED) { 3489 struct cfg80211_assoc_failure data = { 3490 .timeout = status == ASSOC_TIMEOUT, 3491 }; 3492 int i; 3493 3494 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3495 ARRAY_SIZE(assoc_data->link)); 3496 3497 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3498 data.bss[i] = assoc_data->link[i].bss; 3499 3500 if (sdata->vif.valid_links) 3501 data.ap_mld_addr = assoc_data->ap_addr; 3502 3503 cfg80211_assoc_failure(sdata->dev, &data); 3504 } 3505 3506 mutex_lock(&sdata->local->mtx); 3507 ieee80211_link_release_channel(&sdata->deflink); 3508 ieee80211_vif_set_links(sdata, 0); 3509 mutex_unlock(&sdata->local->mtx); 3510 } 3511 3512 kfree(assoc_data); 3513 sdata->u.mgd.assoc_data = NULL; 3514 } 3515 3516 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3517 struct ieee80211_mgmt *mgmt, size_t len) 3518 { 3519 struct ieee80211_local *local = sdata->local; 3520 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3521 const struct element *challenge; 3522 u8 *pos; 3523 u32 tx_flags = 0; 3524 struct ieee80211_prep_tx_info info = { 3525 .subtype = IEEE80211_STYPE_AUTH, 3526 }; 3527 3528 pos = mgmt->u.auth.variable; 3529 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3530 len - (pos - (u8 *)mgmt)); 3531 if (!challenge) 3532 return; 3533 auth_data->expected_transaction = 4; 3534 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3535 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3536 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3537 IEEE80211_TX_INTFL_MLME_CONN_TX; 3538 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3539 (void *)challenge, 3540 challenge->datalen + sizeof(*challenge), 3541 auth_data->ap_addr, auth_data->ap_addr, 3542 auth_data->key, auth_data->key_len, 3543 auth_data->key_idx, tx_flags); 3544 } 3545 3546 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3547 { 3548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3549 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3550 struct sta_info *sta; 3551 bool result = true; 3552 3553 sdata_info(sdata, "authenticated\n"); 3554 ifmgd->auth_data->done = true; 3555 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3556 ifmgd->auth_data->timeout_started = true; 3557 run_again(sdata, ifmgd->auth_data->timeout); 3558 3559 /* move station state to auth */ 3560 mutex_lock(&sdata->local->sta_mtx); 3561 sta = sta_info_get(sdata, ap_addr); 3562 if (!sta) { 3563 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3564 result = false; 3565 goto out; 3566 } 3567 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3568 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3569 result = false; 3570 goto out; 3571 } 3572 3573 out: 3574 mutex_unlock(&sdata->local->sta_mtx); 3575 return result; 3576 } 3577 3578 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3579 struct ieee80211_mgmt *mgmt, size_t len) 3580 { 3581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3582 u16 auth_alg, auth_transaction, status_code; 3583 struct ieee80211_event event = { 3584 .type = MLME_EVENT, 3585 .u.mlme.data = AUTH_EVENT, 3586 }; 3587 struct ieee80211_prep_tx_info info = { 3588 .subtype = IEEE80211_STYPE_AUTH, 3589 }; 3590 3591 sdata_assert_lock(sdata); 3592 3593 if (len < 24 + 6) 3594 return; 3595 3596 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3597 return; 3598 3599 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3600 return; 3601 3602 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3603 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3604 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3605 3606 if (auth_alg != ifmgd->auth_data->algorithm || 3607 (auth_alg != WLAN_AUTH_SAE && 3608 auth_transaction != ifmgd->auth_data->expected_transaction) || 3609 (auth_alg == WLAN_AUTH_SAE && 3610 (auth_transaction < ifmgd->auth_data->expected_transaction || 3611 auth_transaction > 2))) { 3612 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3613 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3614 auth_transaction, 3615 ifmgd->auth_data->expected_transaction); 3616 goto notify_driver; 3617 } 3618 3619 if (status_code != WLAN_STATUS_SUCCESS) { 3620 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3621 3622 if (auth_alg == WLAN_AUTH_SAE && 3623 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3624 (auth_transaction == 1 && 3625 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3626 status_code == WLAN_STATUS_SAE_PK)))) { 3627 /* waiting for userspace now */ 3628 ifmgd->auth_data->waiting = true; 3629 ifmgd->auth_data->timeout = 3630 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3631 ifmgd->auth_data->timeout_started = true; 3632 run_again(sdata, ifmgd->auth_data->timeout); 3633 goto notify_driver; 3634 } 3635 3636 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3637 mgmt->sa, status_code); 3638 ieee80211_destroy_auth_data(sdata, false); 3639 event.u.mlme.status = MLME_DENIED; 3640 event.u.mlme.reason = status_code; 3641 drv_event_callback(sdata->local, sdata, &event); 3642 goto notify_driver; 3643 } 3644 3645 switch (ifmgd->auth_data->algorithm) { 3646 case WLAN_AUTH_OPEN: 3647 case WLAN_AUTH_LEAP: 3648 case WLAN_AUTH_FT: 3649 case WLAN_AUTH_SAE: 3650 case WLAN_AUTH_FILS_SK: 3651 case WLAN_AUTH_FILS_SK_PFS: 3652 case WLAN_AUTH_FILS_PK: 3653 break; 3654 case WLAN_AUTH_SHARED_KEY: 3655 if (ifmgd->auth_data->expected_transaction != 4) { 3656 ieee80211_auth_challenge(sdata, mgmt, len); 3657 /* need another frame */ 3658 return; 3659 } 3660 break; 3661 default: 3662 WARN_ONCE(1, "invalid auth alg %d", 3663 ifmgd->auth_data->algorithm); 3664 goto notify_driver; 3665 } 3666 3667 event.u.mlme.status = MLME_SUCCESS; 3668 info.success = 1; 3669 drv_event_callback(sdata->local, sdata, &event); 3670 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3671 (auth_transaction == 2 && 3672 ifmgd->auth_data->expected_transaction == 2)) { 3673 if (!ieee80211_mark_sta_auth(sdata)) 3674 return; /* ignore frame -- wait for timeout */ 3675 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3676 auth_transaction == 2) { 3677 sdata_info(sdata, "SAE peer confirmed\n"); 3678 ifmgd->auth_data->peer_confirmed = true; 3679 } 3680 3681 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3682 notify_driver: 3683 drv_mgd_complete_tx(sdata->local, sdata, &info); 3684 } 3685 3686 #define case_WLAN(type) \ 3687 case WLAN_REASON_##type: return #type 3688 3689 const char *ieee80211_get_reason_code_string(u16 reason_code) 3690 { 3691 switch (reason_code) { 3692 case_WLAN(UNSPECIFIED); 3693 case_WLAN(PREV_AUTH_NOT_VALID); 3694 case_WLAN(DEAUTH_LEAVING); 3695 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3696 case_WLAN(DISASSOC_AP_BUSY); 3697 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3698 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3699 case_WLAN(DISASSOC_STA_HAS_LEFT); 3700 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3701 case_WLAN(DISASSOC_BAD_POWER); 3702 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3703 case_WLAN(INVALID_IE); 3704 case_WLAN(MIC_FAILURE); 3705 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3706 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3707 case_WLAN(IE_DIFFERENT); 3708 case_WLAN(INVALID_GROUP_CIPHER); 3709 case_WLAN(INVALID_PAIRWISE_CIPHER); 3710 case_WLAN(INVALID_AKMP); 3711 case_WLAN(UNSUPP_RSN_VERSION); 3712 case_WLAN(INVALID_RSN_IE_CAP); 3713 case_WLAN(IEEE8021X_FAILED); 3714 case_WLAN(CIPHER_SUITE_REJECTED); 3715 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3716 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3717 case_WLAN(DISASSOC_LOW_ACK); 3718 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3719 case_WLAN(QSTA_LEAVE_QBSS); 3720 case_WLAN(QSTA_NOT_USE); 3721 case_WLAN(QSTA_REQUIRE_SETUP); 3722 case_WLAN(QSTA_TIMEOUT); 3723 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3724 case_WLAN(MESH_PEER_CANCELED); 3725 case_WLAN(MESH_MAX_PEERS); 3726 case_WLAN(MESH_CONFIG); 3727 case_WLAN(MESH_CLOSE); 3728 case_WLAN(MESH_MAX_RETRIES); 3729 case_WLAN(MESH_CONFIRM_TIMEOUT); 3730 case_WLAN(MESH_INVALID_GTK); 3731 case_WLAN(MESH_INCONSISTENT_PARAM); 3732 case_WLAN(MESH_INVALID_SECURITY); 3733 case_WLAN(MESH_PATH_ERROR); 3734 case_WLAN(MESH_PATH_NOFORWARD); 3735 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3736 case_WLAN(MAC_EXISTS_IN_MBSS); 3737 case_WLAN(MESH_CHAN_REGULATORY); 3738 case_WLAN(MESH_CHAN); 3739 default: return "<unknown>"; 3740 } 3741 } 3742 3743 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3744 struct ieee80211_mgmt *mgmt, size_t len) 3745 { 3746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3747 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3748 3749 sdata_assert_lock(sdata); 3750 3751 if (len < 24 + 2) 3752 return; 3753 3754 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3755 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3756 return; 3757 } 3758 3759 if (ifmgd->associated && 3760 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 3761 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3762 sdata->vif.cfg.ap_addr, reason_code, 3763 ieee80211_get_reason_code_string(reason_code)); 3764 3765 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3766 3767 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3768 reason_code, false); 3769 return; 3770 } 3771 3772 if (ifmgd->assoc_data && 3773 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 3774 sdata_info(sdata, 3775 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3776 ifmgd->assoc_data->ap_addr, reason_code, 3777 ieee80211_get_reason_code_string(reason_code)); 3778 3779 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 3780 3781 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3782 return; 3783 } 3784 } 3785 3786 3787 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3788 struct ieee80211_mgmt *mgmt, size_t len) 3789 { 3790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3791 u16 reason_code; 3792 3793 sdata_assert_lock(sdata); 3794 3795 if (len < 24 + 2) 3796 return; 3797 3798 if (!ifmgd->associated || 3799 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 3800 return; 3801 3802 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3803 3804 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3805 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3806 return; 3807 } 3808 3809 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3810 sdata->vif.cfg.ap_addr, reason_code, 3811 ieee80211_get_reason_code_string(reason_code)); 3812 3813 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3814 3815 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3816 false); 3817 } 3818 3819 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3820 u8 *supp_rates, unsigned int supp_rates_len, 3821 u32 *rates, u32 *basic_rates, 3822 bool *have_higher_than_11mbit, 3823 int *min_rate, int *min_rate_index, 3824 int shift) 3825 { 3826 int i, j; 3827 3828 for (i = 0; i < supp_rates_len; i++) { 3829 int rate = supp_rates[i] & 0x7f; 3830 bool is_basic = !!(supp_rates[i] & 0x80); 3831 3832 if ((rate * 5 * (1 << shift)) > 110) 3833 *have_higher_than_11mbit = true; 3834 3835 /* 3836 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3837 * since they're not rates. 3838 * 3839 * Note: Even though the membership selector and the basic 3840 * rate flag share the same bit, they are not exactly 3841 * the same. 3842 */ 3843 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3844 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3845 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3846 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3847 continue; 3848 3849 for (j = 0; j < sband->n_bitrates; j++) { 3850 struct ieee80211_rate *br; 3851 int brate; 3852 3853 br = &sband->bitrates[j]; 3854 3855 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3856 if (brate == rate) { 3857 *rates |= BIT(j); 3858 if (is_basic) 3859 *basic_rates |= BIT(j); 3860 if ((rate * 5) < *min_rate) { 3861 *min_rate = rate * 5; 3862 *min_rate_index = j; 3863 } 3864 break; 3865 } 3866 } 3867 } 3868 } 3869 3870 static bool ieee80211_twt_req_supported(const struct link_sta_info *link_sta, 3871 const struct ieee802_11_elems *elems) 3872 { 3873 if (elems->ext_capab_len < 10) 3874 return false; 3875 3876 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3877 return false; 3878 3879 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 3880 IEEE80211_HE_MAC_CAP0_TWT_RES; 3881 } 3882 3883 static int ieee80211_recalc_twt_req(struct ieee80211_link_data *link, 3884 struct link_sta_info *link_sta, 3885 struct ieee802_11_elems *elems) 3886 { 3887 bool twt = ieee80211_twt_req_supported(link_sta, elems); 3888 3889 if (link->conf->twt_requester != twt) { 3890 link->conf->twt_requester = twt; 3891 return BSS_CHANGED_TWT; 3892 } 3893 return 0; 3894 } 3895 3896 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3897 struct ieee80211_bss_conf *bss_conf, 3898 struct ieee80211_supported_band *sband, 3899 struct link_sta_info *link_sta) 3900 { 3901 const struct ieee80211_sta_he_cap *own_he_cap = 3902 ieee80211_get_he_iftype_cap(sband, 3903 ieee80211_vif_type_p2p(&sdata->vif)); 3904 3905 return bss_conf->he_support && 3906 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 3907 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3908 own_he_cap && 3909 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3910 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3911 } 3912 3913 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 3914 struct link_sta_info *link_sta, 3915 struct cfg80211_bss *cbss, 3916 struct ieee80211_mgmt *mgmt, 3917 const u8 *elem_start, 3918 unsigned int elem_len, 3919 u64 *changed) 3920 { 3921 struct ieee80211_sub_if_data *sdata = link->sdata; 3922 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3923 struct ieee80211_bss_conf *bss_conf = link->conf; 3924 struct ieee80211_local *local = sdata->local; 3925 struct ieee80211_elems_parse_params parse_params = { 3926 .start = elem_start, 3927 .len = elem_len, 3928 .bss = cbss, 3929 .link_id = link == &sdata->deflink ? -1 : link->link_id, 3930 .from_ap = true, 3931 }; 3932 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3933 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3934 const struct cfg80211_bss_ies *bss_ies = NULL; 3935 struct ieee80211_supported_band *sband; 3936 struct ieee802_11_elems *elems; 3937 u16 capab_info; 3938 bool ret; 3939 3940 elems = ieee802_11_parse_elems_full(&parse_params); 3941 if (!elems) 3942 return false; 3943 3944 /* FIXME: use from STA profile element after parsing that */ 3945 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3946 3947 if (!is_s1g && !elems->supp_rates) { 3948 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3949 ret = false; 3950 goto out; 3951 } 3952 3953 link->u.mgd.tdls_chan_switch_prohibited = 3954 elems->ext_capab && elems->ext_capab_len >= 5 && 3955 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3956 3957 /* 3958 * Some APs are erroneously not including some information in their 3959 * (re)association response frames. Try to recover by using the data 3960 * from the beacon or probe response. This seems to afflict mobile 3961 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3962 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3963 */ 3964 if (!is_6ghz && 3965 ((assoc_data->wmm && !elems->wmm_param) || 3966 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 3967 (!elems->ht_cap_elem || !elems->ht_operation)) || 3968 (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 3969 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3970 const struct cfg80211_bss_ies *ies; 3971 struct ieee802_11_elems *bss_elems; 3972 3973 rcu_read_lock(); 3974 ies = rcu_dereference(cbss->ies); 3975 if (ies) 3976 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3977 GFP_ATOMIC); 3978 rcu_read_unlock(); 3979 if (!bss_ies) { 3980 ret = false; 3981 goto out; 3982 } 3983 3984 parse_params.start = bss_ies->data; 3985 parse_params.len = bss_ies->len; 3986 bss_elems = ieee802_11_parse_elems_full(&parse_params); 3987 if (!bss_elems) { 3988 ret = false; 3989 goto out; 3990 } 3991 3992 if (assoc_data->wmm && 3993 !elems->wmm_param && bss_elems->wmm_param) { 3994 elems->wmm_param = bss_elems->wmm_param; 3995 sdata_info(sdata, 3996 "AP bug: WMM param missing from AssocResp\n"); 3997 } 3998 3999 /* 4000 * Also check if we requested HT/VHT, otherwise the AP doesn't 4001 * have to include the IEs in the (re)association response. 4002 */ 4003 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4004 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4005 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4006 sdata_info(sdata, 4007 "AP bug: HT capability missing from AssocResp\n"); 4008 } 4009 if (!elems->ht_operation && bss_elems->ht_operation && 4010 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) { 4011 elems->ht_operation = bss_elems->ht_operation; 4012 sdata_info(sdata, 4013 "AP bug: HT operation missing from AssocResp\n"); 4014 } 4015 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4016 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4017 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4018 sdata_info(sdata, 4019 "AP bug: VHT capa missing from AssocResp\n"); 4020 } 4021 if (!elems->vht_operation && bss_elems->vht_operation && 4022 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) { 4023 elems->vht_operation = bss_elems->vht_operation; 4024 sdata_info(sdata, 4025 "AP bug: VHT operation missing from AssocResp\n"); 4026 } 4027 4028 kfree(bss_elems); 4029 } 4030 4031 /* 4032 * We previously checked these in the beacon/probe response, so 4033 * they should be present here. This is just a safety net. 4034 */ 4035 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) && 4036 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4037 sdata_info(sdata, 4038 "HT AP is missing WMM params or HT capability/operation\n"); 4039 ret = false; 4040 goto out; 4041 } 4042 4043 if (!is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) && 4044 (!elems->vht_cap_elem || !elems->vht_operation)) { 4045 sdata_info(sdata, 4046 "VHT AP is missing VHT capability/operation\n"); 4047 ret = false; 4048 goto out; 4049 } 4050 4051 if (is_6ghz && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4052 !elems->he_6ghz_capa) { 4053 sdata_info(sdata, 4054 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 4055 ret = false; 4056 goto out; 4057 } 4058 4059 sband = ieee80211_get_link_sband(link); 4060 if (!sband) { 4061 ret = false; 4062 goto out; 4063 } 4064 4065 if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4066 (!elems->he_cap || !elems->he_operation)) { 4067 mutex_unlock(&sdata->local->sta_mtx); 4068 sdata_info(sdata, 4069 "HE AP is missing HE capability/operation\n"); 4070 ret = false; 4071 goto out; 4072 } 4073 4074 /* Set up internal HT/VHT capabilities */ 4075 if (elems->ht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT)) 4076 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4077 elems->ht_cap_elem, 4078 link_sta); 4079 4080 if (elems->vht_cap_elem && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT)) 4081 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4082 elems->vht_cap_elem, 4083 link_sta); 4084 4085 if (elems->he_operation && !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) && 4086 elems->he_cap) { 4087 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4088 elems->he_cap, 4089 elems->he_cap_len, 4090 elems->he_6ghz_capa, 4091 link_sta); 4092 4093 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4094 if (elems->rsnx && elems->rsnx_len && 4095 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4096 wiphy_ext_feature_isset(local->hw.wiphy, 4097 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4098 bss_conf->twt_protected = true; 4099 else 4100 bss_conf->twt_protected = false; 4101 4102 *changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 4103 4104 if (elems->eht_operation && elems->eht_cap && 4105 !(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_EHT)) { 4106 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4107 elems->he_cap, 4108 elems->he_cap_len, 4109 elems->eht_cap, 4110 elems->eht_cap_len, 4111 link_sta); 4112 4113 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4114 } else { 4115 bss_conf->eht_support = false; 4116 } 4117 } else { 4118 bss_conf->he_support = false; 4119 bss_conf->twt_requester = false; 4120 bss_conf->twt_protected = false; 4121 bss_conf->eht_support = false; 4122 } 4123 4124 bss_conf->twt_broadcast = 4125 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4126 4127 if (bss_conf->he_support) { 4128 bss_conf->he_bss_color.color = 4129 le32_get_bits(elems->he_operation->he_oper_params, 4130 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4131 bss_conf->he_bss_color.partial = 4132 le32_get_bits(elems->he_operation->he_oper_params, 4133 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4134 bss_conf->he_bss_color.enabled = 4135 !le32_get_bits(elems->he_operation->he_oper_params, 4136 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4137 4138 if (bss_conf->he_bss_color.enabled) 4139 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4140 4141 bss_conf->htc_trig_based_pkt_ext = 4142 le32_get_bits(elems->he_operation->he_oper_params, 4143 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4144 bss_conf->frame_time_rts_th = 4145 le32_get_bits(elems->he_operation->he_oper_params, 4146 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4147 4148 bss_conf->uora_exists = !!elems->uora_element; 4149 if (elems->uora_element) 4150 bss_conf->uora_ocw_range = elems->uora_element[0]; 4151 4152 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4153 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4154 /* TODO: OPEN: what happens if BSS color disable is set? */ 4155 } 4156 4157 if (cbss->transmitted_bss) { 4158 bss_conf->nontransmitted = true; 4159 ether_addr_copy(bss_conf->transmitter_bssid, 4160 cbss->transmitted_bss->bssid); 4161 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4162 bss_conf->bssid_index = cbss->bssid_index; 4163 } 4164 4165 /* 4166 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4167 * in their association response, so ignore that data for our own 4168 * configuration. If it changed since the last beacon, we'll get the 4169 * next beacon and update then. 4170 */ 4171 4172 /* 4173 * If an operating mode notification IE is present, override the 4174 * NSS calculation (that would be done in rate_control_rate_init()) 4175 * and use the # of streams from that element. 4176 */ 4177 if (elems->opmode_notif && 4178 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4179 u8 nss; 4180 4181 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4182 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4183 nss += 1; 4184 link_sta->pub->rx_nss = nss; 4185 } 4186 4187 /* 4188 * Always handle WMM once after association regardless 4189 * of the first value the AP uses. Setting -1 here has 4190 * that effect because the AP values is an unsigned 4191 * 4-bit value. 4192 */ 4193 link->u.mgd.wmm_last_param_set = -1; 4194 link->u.mgd.mu_edca_last_param_set = -1; 4195 4196 if (link->u.mgd.disable_wmm_tracking) { 4197 ieee80211_set_wmm_default(link, false, false); 4198 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4199 elems->wmm_param_len, 4200 elems->mu_edca_param_set)) { 4201 /* still enable QoS since we might have HT/VHT */ 4202 ieee80211_set_wmm_default(link, false, true); 4203 /* disable WMM tracking in this case to disable 4204 * tracking WMM parameter changes in the beacon if 4205 * the parameters weren't actually valid. Doing so 4206 * avoids changing parameters very strangely when 4207 * the AP is going back and forth between valid and 4208 * invalid parameters. 4209 */ 4210 link->u.mgd.disable_wmm_tracking = true; 4211 } 4212 4213 if (elems->max_idle_period_ie) { 4214 bss_conf->max_idle_period = 4215 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4216 bss_conf->protected_keep_alive = 4217 !!(elems->max_idle_period_ie->idle_options & 4218 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4219 *changed |= BSS_CHANGED_KEEP_ALIVE; 4220 } else { 4221 bss_conf->max_idle_period = 0; 4222 bss_conf->protected_keep_alive = false; 4223 } 4224 4225 /* set assoc capability (AID was already set earlier), 4226 * ieee80211_set_associated() will tell the driver */ 4227 bss_conf->assoc_capability = capab_info; 4228 4229 ret = true; 4230 out: 4231 kfree(elems); 4232 kfree(bss_ies); 4233 return ret; 4234 } 4235 4236 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4237 struct sta_info *sta, 4238 struct link_sta_info *link_sta, 4239 struct cfg80211_bss *cbss) 4240 { 4241 struct ieee80211_sub_if_data *sdata = link->sdata; 4242 struct ieee80211_local *local = sdata->local; 4243 struct ieee80211_bss *bss = (void *)cbss->priv; 4244 u32 rates = 0, basic_rates = 0; 4245 bool have_higher_than_11mbit = false; 4246 int min_rate = INT_MAX, min_rate_index = -1; 4247 /* this is clearly wrong for MLO but we'll just remove it later */ 4248 int shift = ieee80211_vif_get_shift(&sdata->vif); 4249 struct ieee80211_supported_band *sband; 4250 4251 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4252 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4253 4254 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4255 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4256 ieee80211_s1g_sta_rate_init(sta); 4257 return 0; 4258 } 4259 4260 sband = local->hw.wiphy->bands[cbss->channel->band]; 4261 4262 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4263 &rates, &basic_rates, &have_higher_than_11mbit, 4264 &min_rate, &min_rate_index, shift); 4265 4266 /* 4267 * This used to be a workaround for basic rates missing 4268 * in the association response frame. Now that we no 4269 * longer use the basic rates from there, it probably 4270 * doesn't happen any more, but keep the workaround so 4271 * in case some *other* APs are buggy in different ways 4272 * we can connect -- with a warning. 4273 * Allow this workaround only in case the AP provided at least 4274 * one rate. 4275 */ 4276 if (min_rate_index < 0) { 4277 link_info(link, "No legacy rates in association response\n"); 4278 return -EINVAL; 4279 } else if (!basic_rates) { 4280 link_info(link, "No basic rates, using min rate instead\n"); 4281 basic_rates = BIT(min_rate_index); 4282 } 4283 4284 if (rates) 4285 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4286 else 4287 link_info(link, "No rates found, keeping mandatory only\n"); 4288 4289 link->conf->basic_rates = basic_rates; 4290 4291 /* cf. IEEE 802.11 9.2.12 */ 4292 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4293 have_higher_than_11mbit; 4294 4295 return 0; 4296 } 4297 4298 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4299 struct cfg80211_bss *cbss) 4300 { 4301 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4302 const struct element *ht_cap_elem, *vht_cap_elem; 4303 const struct cfg80211_bss_ies *ies; 4304 const struct ieee80211_ht_cap *ht_cap; 4305 const struct ieee80211_vht_cap *vht_cap; 4306 const struct ieee80211_he_cap_elem *he_cap; 4307 const struct element *he_cap_elem; 4308 u16 mcs_80_map, mcs_160_map; 4309 int i, mcs_nss_size; 4310 bool support_160; 4311 u8 chains = 1; 4312 4313 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HT) 4314 return chains; 4315 4316 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4317 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4318 ht_cap = (void *)ht_cap_elem->data; 4319 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4320 /* 4321 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4322 * "Tx Unequal Modulation Supported" fields. 4323 */ 4324 } 4325 4326 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_VHT) 4327 return chains; 4328 4329 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4330 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4331 u8 nss; 4332 u16 tx_mcs_map; 4333 4334 vht_cap = (void *)vht_cap_elem->data; 4335 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4336 for (nss = 8; nss > 0; nss--) { 4337 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4338 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4339 break; 4340 } 4341 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4342 chains = max(chains, nss); 4343 } 4344 4345 if (link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) 4346 return chains; 4347 4348 ies = rcu_dereference(cbss->ies); 4349 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4350 ies->data, ies->len); 4351 4352 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4353 return chains; 4354 4355 /* skip one byte ext_tag_id */ 4356 he_cap = (void *)(he_cap_elem->data + 1); 4357 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4358 4359 /* invalid HE IE */ 4360 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4361 return chains; 4362 4363 /* mcs_nss is right after he_cap info */ 4364 he_mcs_nss_supp = (void *)(he_cap + 1); 4365 4366 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4367 4368 for (i = 7; i >= 0; i--) { 4369 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4370 4371 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4372 chains = max_t(u8, chains, i + 1); 4373 break; 4374 } 4375 } 4376 4377 support_160 = he_cap->phy_cap_info[0] & 4378 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4379 4380 if (!support_160) 4381 return chains; 4382 4383 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4384 for (i = 7; i >= 0; i--) { 4385 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4386 4387 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4388 chains = max_t(u8, chains, i + 1); 4389 break; 4390 } 4391 } 4392 4393 return chains; 4394 } 4395 4396 static bool 4397 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4398 const struct cfg80211_bss_ies *ies, 4399 const struct ieee80211_he_operation *he_op) 4400 { 4401 const struct element *he_cap_elem; 4402 const struct ieee80211_he_cap_elem *he_cap; 4403 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4404 u16 mcs_80_map_tx, mcs_80_map_rx; 4405 u16 ap_min_req_set; 4406 int mcs_nss_size; 4407 int nss; 4408 4409 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4410 ies->data, ies->len); 4411 4412 /* invalid HE IE */ 4413 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 4414 sdata_info(sdata, 4415 "Invalid HE elem, Disable HE\n"); 4416 return false; 4417 } 4418 4419 /* skip one byte ext_tag_id */ 4420 he_cap = (void *)(he_cap_elem->data + 1); 4421 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4422 4423 /* invalid HE IE */ 4424 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 4425 sdata_info(sdata, 4426 "Invalid HE elem with nss size, Disable HE\n"); 4427 return false; 4428 } 4429 4430 /* mcs_nss is right after he_cap info */ 4431 he_mcs_nss_supp = (void *)(he_cap + 1); 4432 4433 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4434 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 4435 4436 /* P802.11-REVme/D0.3 4437 * 27.1.1 Introduction to the HE PHY 4438 * ... 4439 * An HE STA shall support the following features: 4440 * ... 4441 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 4442 * supported channel widths for HE SU PPDUs 4443 */ 4444 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 4445 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 4446 sdata_info(sdata, 4447 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 4448 mcs_80_map_tx, mcs_80_map_rx); 4449 return false; 4450 } 4451 4452 if (!he_op) 4453 return true; 4454 4455 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4456 4457 /* 4458 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4459 * zeroes, which is nonsense, and completely inconsistent with itself 4460 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4461 */ 4462 if (!ap_min_req_set) 4463 return true; 4464 4465 /* make sure the AP is consistent with itself 4466 * 4467 * P802.11-REVme/D0.3 4468 * 26.17.1 Basic HE BSS operation 4469 * 4470 * A STA that is operating in an HE BSS shall be able to receive and 4471 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 4472 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 4473 * MLME-START.request primitive and shall be able to receive at each of 4474 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 4475 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 4476 * primitive 4477 */ 4478 for (nss = 8; nss > 0; nss--) { 4479 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4480 u8 ap_rx_val; 4481 u8 ap_tx_val; 4482 4483 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4484 continue; 4485 4486 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 4487 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 4488 4489 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4490 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4491 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 4492 sdata_info(sdata, 4493 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 4494 nss, ap_rx_val, ap_rx_val, ap_op_val); 4495 return false; 4496 } 4497 } 4498 4499 return true; 4500 } 4501 4502 static bool 4503 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4504 struct ieee80211_supported_band *sband, 4505 const struct ieee80211_he_operation *he_op) 4506 { 4507 const struct ieee80211_sta_he_cap *sta_he_cap = 4508 ieee80211_get_he_iftype_cap(sband, 4509 ieee80211_vif_type_p2p(&sdata->vif)); 4510 u16 ap_min_req_set; 4511 int i; 4512 4513 if (!sta_he_cap || !he_op) 4514 return false; 4515 4516 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4517 4518 /* 4519 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 4520 * zeroes, which is nonsense, and completely inconsistent with itself 4521 * (it doesn't have 8 streams). Accept the settings in this case anyway. 4522 */ 4523 if (!ap_min_req_set) 4524 return true; 4525 4526 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4527 for (i = 0; i < 3; i++) { 4528 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4529 &sta_he_cap->he_mcs_nss_supp; 4530 u16 sta_mcs_map_rx = 4531 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4532 u16 sta_mcs_map_tx = 4533 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4534 u8 nss; 4535 bool verified = true; 4536 4537 /* 4538 * For each band there is a maximum of 8 spatial streams 4539 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4540 * of 2 bits per NSS (1-8), with the values defined in enum 4541 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4542 * capabilities aren't less than the AP's minimum requirements 4543 * for this HE BSS per SS. 4544 * It is enough to find one such band that meets the reqs. 4545 */ 4546 for (nss = 8; nss > 0; nss--) { 4547 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4548 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4549 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4550 4551 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4552 continue; 4553 4554 /* 4555 * Make sure the HE AP doesn't require MCSs that aren't 4556 * supported by the client as required by spec 4557 * 4558 * P802.11-REVme/D0.3 4559 * 26.17.1 Basic HE BSS operation 4560 * 4561 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 4562 * a BSS, unless it supports (i.e., is able to both transmit and 4563 * receive using) all of the <HE-MCS, NSS> tuples in the basic 4564 * HE-MCS and NSS set. 4565 */ 4566 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4567 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4568 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4569 verified = false; 4570 break; 4571 } 4572 } 4573 4574 if (verified) 4575 return true; 4576 } 4577 4578 /* If here, STA doesn't meet AP's HE min requirements */ 4579 return false; 4580 } 4581 4582 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4583 struct ieee80211_link_data *link, 4584 struct cfg80211_bss *cbss, 4585 ieee80211_conn_flags_t *conn_flags) 4586 { 4587 struct ieee80211_local *local = sdata->local; 4588 const struct ieee80211_ht_cap *ht_cap = NULL; 4589 const struct ieee80211_ht_operation *ht_oper = NULL; 4590 const struct ieee80211_vht_operation *vht_oper = NULL; 4591 const struct ieee80211_he_operation *he_oper = NULL; 4592 const struct ieee80211_eht_operation *eht_oper = NULL; 4593 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4594 struct ieee80211_supported_band *sband; 4595 struct cfg80211_chan_def chandef; 4596 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4597 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4598 struct ieee80211_bss *bss = (void *)cbss->priv; 4599 struct ieee80211_elems_parse_params parse_params = { 4600 .bss = cbss, 4601 .link_id = -1, 4602 .from_ap = true, 4603 }; 4604 struct ieee802_11_elems *elems; 4605 const struct cfg80211_bss_ies *ies; 4606 int ret; 4607 u32 i; 4608 bool have_80mhz; 4609 4610 rcu_read_lock(); 4611 4612 ies = rcu_dereference(cbss->ies); 4613 parse_params.start = ies->data; 4614 parse_params.len = ies->len; 4615 elems = ieee802_11_parse_elems_full(&parse_params); 4616 if (!elems) { 4617 rcu_read_unlock(); 4618 return -ENOMEM; 4619 } 4620 4621 sband = local->hw.wiphy->bands[cbss->channel->band]; 4622 4623 *conn_flags &= ~(IEEE80211_CONN_DISABLE_40MHZ | 4624 IEEE80211_CONN_DISABLE_80P80MHZ | 4625 IEEE80211_CONN_DISABLE_160MHZ); 4626 4627 /* disable HT/VHT/HE if we don't support them */ 4628 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4629 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 4630 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4631 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4632 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4633 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4634 } 4635 4636 if (!sband->vht_cap.vht_supported && is_5ghz) { 4637 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 4638 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4639 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4640 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4641 } 4642 4643 if (!ieee80211_get_he_iftype_cap(sband, 4644 ieee80211_vif_type_p2p(&sdata->vif))) { 4645 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 4646 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4647 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4648 } 4649 4650 if (!ieee80211_get_eht_iftype_cap(sband, 4651 ieee80211_vif_type_p2p(&sdata->vif))) { 4652 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 4653 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4654 } 4655 4656 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HT) && !is_6ghz) { 4657 ht_oper = elems->ht_operation; 4658 ht_cap = elems->ht_cap_elem; 4659 4660 if (!ht_cap) { 4661 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4662 ht_oper = NULL; 4663 } 4664 } 4665 4666 if (!(*conn_flags & IEEE80211_CONN_DISABLE_VHT) && !is_6ghz) { 4667 vht_oper = elems->vht_operation; 4668 if (vht_oper && !ht_oper) { 4669 vht_oper = NULL; 4670 sdata_info(sdata, 4671 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4672 *conn_flags |= IEEE80211_CONN_DISABLE_HT; 4673 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4674 *conn_flags |= IEEE80211_CONN_DISABLE_HE; 4675 *conn_flags |= IEEE80211_CONN_DISABLE_EHT; 4676 } 4677 4678 if (!elems->vht_cap_elem) { 4679 sdata_info(sdata, 4680 "bad VHT capabilities, disabling VHT\n"); 4681 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4682 vht_oper = NULL; 4683 } 4684 } 4685 4686 if (!(*conn_flags & IEEE80211_CONN_DISABLE_HE)) { 4687 he_oper = elems->he_operation; 4688 4689 if (link && is_6ghz) { 4690 struct ieee80211_bss_conf *bss_conf; 4691 u8 j = 0; 4692 4693 bss_conf = link->conf; 4694 4695 if (elems->pwr_constr_elem) 4696 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 4697 4698 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 4699 ARRAY_SIZE(elems->tx_pwr_env)); 4700 4701 for (i = 0; i < elems->tx_pwr_env_num; i++) { 4702 if (elems->tx_pwr_env_len[i] > 4703 sizeof(bss_conf->tx_pwr_env[j])) 4704 continue; 4705 4706 bss_conf->tx_pwr_env_num++; 4707 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 4708 elems->tx_pwr_env_len[i]); 4709 j++; 4710 } 4711 } 4712 4713 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 4714 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 4715 *conn_flags |= IEEE80211_CONN_DISABLE_HE | 4716 IEEE80211_CONN_DISABLE_EHT; 4717 } 4718 4719 /* 4720 * EHT requires HE to be supported as well. Specifically for 6 GHz 4721 * channels, the operation channel information can only be deduced from 4722 * both the 6 GHz operation information (from the HE operation IE) and 4723 * EHT operation. 4724 */ 4725 if (!(*conn_flags & 4726 (IEEE80211_CONN_DISABLE_HE | 4727 IEEE80211_CONN_DISABLE_EHT)) && 4728 he_oper) { 4729 const struct cfg80211_bss_ies *cbss_ies; 4730 const u8 *eht_oper_ie; 4731 4732 cbss_ies = rcu_dereference(cbss->ies); 4733 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 4734 cbss_ies->data, cbss_ies->len); 4735 if (eht_oper_ie && eht_oper_ie[1] >= 4736 1 + sizeof(struct ieee80211_eht_operation)) 4737 eht_oper = (void *)(eht_oper_ie + 3); 4738 else 4739 eht_oper = NULL; 4740 } 4741 4742 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4743 have_80mhz = false; 4744 for (i = 0; i < sband->n_channels; i++) { 4745 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4746 IEEE80211_CHAN_NO_80MHZ)) 4747 continue; 4748 4749 have_80mhz = true; 4750 break; 4751 } 4752 4753 if (!have_80mhz) { 4754 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 4755 *conn_flags |= IEEE80211_CONN_DISABLE_VHT; 4756 } 4757 4758 if (sband->band == NL80211_BAND_S1GHZ) { 4759 s1g_oper = elems->s1g_oper; 4760 if (!s1g_oper) 4761 sdata_info(sdata, 4762 "AP missing S1G operation element?\n"); 4763 } 4764 4765 *conn_flags |= 4766 ieee80211_determine_chantype(sdata, link, *conn_flags, 4767 sband, 4768 cbss->channel, 4769 bss->vht_cap_info, 4770 ht_oper, vht_oper, 4771 he_oper, eht_oper, 4772 s1g_oper, 4773 &chandef, false); 4774 4775 if (link) 4776 link->needed_rx_chains = 4777 min(ieee80211_max_rx_chains(link, cbss), 4778 local->rx_chains); 4779 4780 rcu_read_unlock(); 4781 /* the element data was RCU protected so no longer valid anyway */ 4782 kfree(elems); 4783 elems = NULL; 4784 4785 if (*conn_flags & IEEE80211_CONN_DISABLE_HE && is_6ghz) { 4786 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 4787 return -EINVAL; 4788 } 4789 4790 if (!link) 4791 return 0; 4792 4793 /* will change later if needed */ 4794 link->smps_mode = IEEE80211_SMPS_OFF; 4795 4796 mutex_lock(&local->mtx); 4797 /* 4798 * If this fails (possibly due to channel context sharing 4799 * on incompatible channels, e.g. 80+80 and 160 sharing the 4800 * same control channel) try to use a smaller bandwidth. 4801 */ 4802 ret = ieee80211_link_use_channel(link, &chandef, 4803 IEEE80211_CHANCTX_SHARED); 4804 4805 /* don't downgrade for 5 and 10 MHz channels, though. */ 4806 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4807 chandef.width == NL80211_CHAN_WIDTH_10) 4808 goto out; 4809 4810 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4811 *conn_flags |= 4812 ieee80211_chandef_downgrade(&chandef); 4813 ret = ieee80211_link_use_channel(link, &chandef, 4814 IEEE80211_CHANCTX_SHARED); 4815 } 4816 out: 4817 mutex_unlock(&local->mtx); 4818 return ret; 4819 } 4820 4821 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 4822 struct ieee80211_mgmt *mgmt, 4823 struct ieee802_11_elems *elems, 4824 const u8 *elem_start, unsigned int elem_len) 4825 { 4826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4827 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4828 struct ieee80211_local *local = sdata->local; 4829 unsigned int link_id; 4830 struct sta_info *sta; 4831 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 4832 int err; 4833 4834 mutex_lock(&sdata->local->sta_mtx); 4835 /* 4836 * station info was already allocated and inserted before 4837 * the association and should be available to us 4838 */ 4839 sta = sta_info_get(sdata, assoc_data->ap_addr); 4840 if (WARN_ON(!sta)) 4841 goto out_err; 4842 4843 if (sdata->vif.valid_links) { 4844 u16 valid_links = 0; 4845 4846 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4847 if (!assoc_data->link[link_id].bss) 4848 continue; 4849 valid_links |= BIT(link_id); 4850 4851 if (link_id != assoc_data->assoc_link_id) { 4852 err = ieee80211_sta_allocate_link(sta, link_id); 4853 if (err) 4854 goto out_err; 4855 } 4856 } 4857 4858 ieee80211_vif_set_links(sdata, valid_links); 4859 } 4860 4861 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4862 struct ieee80211_link_data *link; 4863 struct link_sta_info *link_sta; 4864 4865 if (!assoc_data->link[link_id].bss) 4866 continue; 4867 4868 link = sdata_dereference(sdata->link[link_id], sdata); 4869 if (WARN_ON(!link)) 4870 goto out_err; 4871 4872 if (sdata->vif.valid_links) 4873 link_info(link, 4874 "local address %pM, AP link address %pM\n", 4875 link->conf->addr, 4876 assoc_data->link[link_id].bss->bssid); 4877 4878 link_sta = rcu_dereference_protected(sta->link[link_id], 4879 lockdep_is_held(&local->sta_mtx)); 4880 if (WARN_ON(!link_sta)) 4881 goto out_err; 4882 4883 if (link_id != assoc_data->assoc_link_id) { 4884 err = ieee80211_prep_channel(sdata, link, 4885 assoc_data->link[link_id].bss, 4886 &link->u.mgd.conn_flags); 4887 if (err) 4888 goto out_err; 4889 } 4890 4891 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 4892 assoc_data->link[link_id].bss); 4893 if (err) 4894 goto out_err; 4895 4896 if (!ieee80211_assoc_config_link(link, link_sta, 4897 assoc_data->link[link_id].bss, 4898 mgmt, elem_start, elem_len, 4899 &changed[link_id])) 4900 goto out_err; 4901 4902 if (link_id != assoc_data->assoc_link_id) { 4903 err = ieee80211_sta_activate_link(sta, link_id); 4904 if (err) 4905 goto out_err; 4906 } 4907 } 4908 4909 rate_control_rate_init(sta); 4910 4911 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 4912 set_sta_flag(sta, WLAN_STA_MFP); 4913 sta->sta.mfp = true; 4914 } else { 4915 sta->sta.mfp = false; 4916 } 4917 4918 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 4919 elems->ext_capab_len); 4920 4921 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 4922 local->hw.queues >= IEEE80211_NUM_ACS; 4923 4924 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 4925 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 4926 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 4927 if (err) { 4928 sdata_info(sdata, 4929 "failed to move station %pM to desired state\n", 4930 sta->sta.addr); 4931 WARN_ON(__sta_info_destroy(sta)); 4932 goto out_err; 4933 } 4934 4935 if (sdata->wdev.use_4addr) 4936 drv_sta_set_4addr(local, sdata, &sta->sta, true); 4937 4938 mutex_unlock(&sdata->local->sta_mtx); 4939 4940 ieee80211_set_associated(sdata, assoc_data, changed); 4941 4942 /* 4943 * If we're using 4-addr mode, let the AP know that we're 4944 * doing so, so that it can create the STA VLAN on its side 4945 */ 4946 if (ifmgd->use_4addr) 4947 ieee80211_send_4addr_nullfunc(local, sdata); 4948 4949 /* 4950 * Start timer to probe the connection to the AP now. 4951 * Also start the timer that will detect beacon loss. 4952 */ 4953 ieee80211_sta_reset_beacon_monitor(sdata); 4954 ieee80211_sta_reset_conn_monitor(sdata); 4955 4956 return true; 4957 out_err: 4958 eth_zero_addr(sdata->vif.cfg.ap_addr); 4959 mutex_unlock(&sdata->local->sta_mtx); 4960 return false; 4961 } 4962 4963 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 4964 struct ieee80211_mgmt *mgmt, 4965 size_t len) 4966 { 4967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4968 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 4969 u16 capab_info, status_code, aid; 4970 struct ieee80211_elems_parse_params parse_params = { 4971 .bss = NULL, 4972 .link_id = -1, 4973 .from_ap = true, 4974 }; 4975 struct ieee802_11_elems *elems; 4976 int ac; 4977 const u8 *elem_start; 4978 unsigned int elem_len; 4979 bool reassoc; 4980 struct ieee80211_event event = { 4981 .type = MLME_EVENT, 4982 .u.mlme.data = ASSOC_EVENT, 4983 }; 4984 struct ieee80211_prep_tx_info info = {}; 4985 struct cfg80211_rx_assoc_resp resp = { 4986 .uapsd_queues = -1, 4987 }; 4988 unsigned int link_id; 4989 4990 sdata_assert_lock(sdata); 4991 4992 if (!assoc_data) 4993 return; 4994 4995 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 4996 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 4997 return; 4998 4999 /* 5000 * AssocResp and ReassocResp have identical structure, so process both 5001 * of them in this function. 5002 */ 5003 5004 if (len < 24 + 6) 5005 return; 5006 5007 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5008 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5009 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5010 if (assoc_data->s1g) 5011 elem_start = mgmt->u.s1g_assoc_resp.variable; 5012 else 5013 elem_start = mgmt->u.assoc_resp.variable; 5014 5015 /* 5016 * Note: this may not be perfect, AP might misbehave - if 5017 * anyone needs to rely on perfect complete notification 5018 * with the exact right subtype, then we need to track what 5019 * we actually transmitted. 5020 */ 5021 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5022 IEEE80211_STYPE_ASSOC_REQ; 5023 5024 if (assoc_data->fils_kek_len && 5025 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5026 return; 5027 5028 elem_len = len - (elem_start - (u8 *)mgmt); 5029 parse_params.start = elem_start; 5030 parse_params.len = elem_len; 5031 elems = ieee802_11_parse_elems_full(&parse_params); 5032 if (!elems) 5033 goto notify_driver; 5034 5035 if (elems->aid_resp) 5036 aid = le16_to_cpu(elems->aid_resp->aid); 5037 else if (assoc_data->s1g) 5038 aid = 0; /* TODO */ 5039 else 5040 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5041 5042 /* 5043 * The 5 MSB of the AID field are reserved 5044 * (802.11-2016 9.4.1.8 AID field) 5045 */ 5046 aid &= 0x7ff; 5047 5048 sdata_info(sdata, 5049 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5050 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5051 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5052 5053 ifmgd->broken_ap = false; 5054 5055 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5056 elems->timeout_int && 5057 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5058 u32 tu, ms; 5059 5060 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5061 le32_to_cpu(elems->timeout_int->value)); 5062 5063 tu = le32_to_cpu(elems->timeout_int->value); 5064 ms = tu * 1024 / 1000; 5065 sdata_info(sdata, 5066 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5067 assoc_data->ap_addr, tu, ms); 5068 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5069 assoc_data->timeout_started = true; 5070 if (ms > IEEE80211_ASSOC_TIMEOUT) 5071 run_again(sdata, assoc_data->timeout); 5072 goto notify_driver; 5073 } 5074 5075 if (status_code != WLAN_STATUS_SUCCESS) { 5076 sdata_info(sdata, "%pM denied association (code=%d)\n", 5077 assoc_data->ap_addr, status_code); 5078 event.u.mlme.status = MLME_DENIED; 5079 event.u.mlme.reason = status_code; 5080 drv_event_callback(sdata->local, sdata, &event); 5081 } else { 5082 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5083 sdata_info(sdata, 5084 "invalid AID value %d (out of range), turn off PS\n", 5085 aid); 5086 aid = 0; 5087 ifmgd->broken_ap = true; 5088 } 5089 5090 if (sdata->vif.valid_links) { 5091 if (!elems->multi_link) { 5092 sdata_info(sdata, 5093 "MLO association with %pM but no multi-link element in response!\n", 5094 assoc_data->ap_addr); 5095 goto abandon_assoc; 5096 } 5097 5098 if (le16_get_bits(elems->multi_link->control, 5099 IEEE80211_ML_CONTROL_TYPE) != 5100 IEEE80211_ML_CONTROL_TYPE_BASIC) { 5101 sdata_info(sdata, 5102 "bad multi-link element (control=0x%x)\n", 5103 le16_to_cpu(elems->multi_link->control)); 5104 goto abandon_assoc; 5105 } else { 5106 struct ieee80211_mle_basic_common_info *common; 5107 5108 common = (void *)elems->multi_link->variable; 5109 5110 if (memcmp(assoc_data->ap_addr, 5111 common->mld_mac_addr, ETH_ALEN)) { 5112 sdata_info(sdata, 5113 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5114 common->mld_mac_addr, 5115 assoc_data->ap_addr); 5116 goto abandon_assoc; 5117 } 5118 } 5119 } 5120 5121 sdata->vif.cfg.aid = aid; 5122 5123 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5124 elem_start, elem_len)) { 5125 /* oops -- internal error -- send timeout for now */ 5126 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5127 goto notify_driver; 5128 } 5129 event.u.mlme.status = MLME_SUCCESS; 5130 drv_event_callback(sdata->local, sdata, &event); 5131 sdata_info(sdata, "associated\n"); 5132 5133 info.success = 1; 5134 } 5135 5136 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5137 struct ieee80211_link_data *link; 5138 5139 link = sdata_dereference(sdata->link[link_id], sdata); 5140 if (!link) 5141 continue; 5142 if (!assoc_data->link[link_id].bss) 5143 continue; 5144 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5145 resp.links[link_id].addr = link->conf->addr; 5146 5147 /* get uapsd queues configuration - same for all links */ 5148 resp.uapsd_queues = 0; 5149 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5150 if (link->tx_conf[ac].uapsd) 5151 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5152 } 5153 5154 ieee80211_destroy_assoc_data(sdata, 5155 status_code == WLAN_STATUS_SUCCESS ? 5156 ASSOC_SUCCESS : 5157 ASSOC_REJECTED); 5158 5159 resp.buf = (u8 *)mgmt; 5160 resp.len = len; 5161 resp.req_ies = ifmgd->assoc_req_ies; 5162 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5163 if (sdata->vif.valid_links) 5164 resp.ap_mld_addr = sdata->vif.cfg.ap_addr; 5165 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5166 notify_driver: 5167 drv_mgd_complete_tx(sdata->local, sdata, &info); 5168 kfree(elems); 5169 return; 5170 abandon_assoc: 5171 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5172 goto notify_driver; 5173 } 5174 5175 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5176 struct ieee80211_mgmt *mgmt, size_t len, 5177 struct ieee80211_rx_status *rx_status) 5178 { 5179 struct ieee80211_sub_if_data *sdata = link->sdata; 5180 struct ieee80211_local *local = sdata->local; 5181 struct ieee80211_bss *bss; 5182 struct ieee80211_channel *channel; 5183 5184 sdata_assert_lock(sdata); 5185 5186 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5187 ieee80211_rx_status_to_khz(rx_status)); 5188 if (!channel) 5189 return; 5190 5191 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5192 if (bss) { 5193 link->conf->beacon_rate = bss->beacon_rate; 5194 ieee80211_rx_bss_put(local, bss); 5195 } 5196 } 5197 5198 5199 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5200 struct sk_buff *skb) 5201 { 5202 struct ieee80211_sub_if_data *sdata = link->sdata; 5203 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5204 struct ieee80211_if_managed *ifmgd; 5205 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5206 struct ieee80211_channel *channel; 5207 size_t baselen, len = skb->len; 5208 5209 ifmgd = &sdata->u.mgd; 5210 5211 sdata_assert_lock(sdata); 5212 5213 /* 5214 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5215 * "If a 6 GHz AP receives a Probe Request frame and responds with 5216 * a Probe Response frame [..], the Address 1 field of the Probe 5217 * Response frame shall be set to the broadcast address [..]" 5218 * So, on 6GHz band we should also accept broadcast responses. 5219 */ 5220 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5221 rx_status->freq); 5222 if (!channel) 5223 return; 5224 5225 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5226 (channel->band != NL80211_BAND_6GHZ || 5227 !is_broadcast_ether_addr(mgmt->da))) 5228 return; /* ignore ProbeResp to foreign address */ 5229 5230 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5231 if (baselen > len) 5232 return; 5233 5234 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5235 5236 if (ifmgd->associated && 5237 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5238 ieee80211_reset_ap_probe(sdata); 5239 } 5240 5241 /* 5242 * This is the canonical list of information elements we care about, 5243 * the filter code also gives us all changes to the Microsoft OUI 5244 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5245 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5246 * changes to requested client power. 5247 * 5248 * We implement beacon filtering in software since that means we can 5249 * avoid processing the frame here and in cfg80211, and userspace 5250 * will not be able to tell whether the hardware supports it or not. 5251 * 5252 * XXX: This list needs to be dynamic -- userspace needs to be able to 5253 * add items it requires. It also needs to be able to tell us to 5254 * look out for other vendor IEs. 5255 */ 5256 static const u64 care_about_ies = 5257 (1ULL << WLAN_EID_COUNTRY) | 5258 (1ULL << WLAN_EID_ERP_INFO) | 5259 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5260 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5261 (1ULL << WLAN_EID_HT_CAPABILITY) | 5262 (1ULL << WLAN_EID_HT_OPERATION) | 5263 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5264 5265 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5266 struct ieee80211_if_managed *ifmgd, 5267 struct ieee80211_bss_conf *bss_conf, 5268 struct ieee80211_local *local, 5269 struct ieee80211_rx_status *rx_status) 5270 { 5271 struct ieee80211_sub_if_data *sdata = link->sdata; 5272 5273 /* Track average RSSI from the Beacon frames of the current AP */ 5274 5275 if (!link->u.mgd.tracking_signal_avg) { 5276 link->u.mgd.tracking_signal_avg = true; 5277 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5278 link->u.mgd.last_cqm_event_signal = 0; 5279 link->u.mgd.count_beacon_signal = 1; 5280 link->u.mgd.last_ave_beacon_signal = 0; 5281 } else { 5282 link->u.mgd.count_beacon_signal++; 5283 } 5284 5285 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5286 -rx_status->signal); 5287 5288 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5289 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5290 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5291 int last_sig = link->u.mgd.last_ave_beacon_signal; 5292 struct ieee80211_event event = { 5293 .type = RSSI_EVENT, 5294 }; 5295 5296 /* 5297 * if signal crosses either of the boundaries, invoke callback 5298 * with appropriate parameters 5299 */ 5300 if (sig > ifmgd->rssi_max_thold && 5301 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5302 link->u.mgd.last_ave_beacon_signal = sig; 5303 event.u.rssi.data = RSSI_EVENT_HIGH; 5304 drv_event_callback(local, sdata, &event); 5305 } else if (sig < ifmgd->rssi_min_thold && 5306 (last_sig >= ifmgd->rssi_max_thold || 5307 last_sig == 0)) { 5308 link->u.mgd.last_ave_beacon_signal = sig; 5309 event.u.rssi.data = RSSI_EVENT_LOW; 5310 drv_event_callback(local, sdata, &event); 5311 } 5312 } 5313 5314 if (bss_conf->cqm_rssi_thold && 5315 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5316 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5317 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5318 int last_event = link->u.mgd.last_cqm_event_signal; 5319 int thold = bss_conf->cqm_rssi_thold; 5320 int hyst = bss_conf->cqm_rssi_hyst; 5321 5322 if (sig < thold && 5323 (last_event == 0 || sig < last_event - hyst)) { 5324 link->u.mgd.last_cqm_event_signal = sig; 5325 ieee80211_cqm_rssi_notify( 5326 &sdata->vif, 5327 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5328 sig, GFP_KERNEL); 5329 } else if (sig > thold && 5330 (last_event == 0 || sig > last_event + hyst)) { 5331 link->u.mgd.last_cqm_event_signal = sig; 5332 ieee80211_cqm_rssi_notify( 5333 &sdata->vif, 5334 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5335 sig, GFP_KERNEL); 5336 } 5337 } 5338 5339 if (bss_conf->cqm_rssi_low && 5340 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5341 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5342 int last_event = link->u.mgd.last_cqm_event_signal; 5343 int low = bss_conf->cqm_rssi_low; 5344 int high = bss_conf->cqm_rssi_high; 5345 5346 if (sig < low && 5347 (last_event == 0 || last_event >= low)) { 5348 link->u.mgd.last_cqm_event_signal = sig; 5349 ieee80211_cqm_rssi_notify( 5350 &sdata->vif, 5351 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5352 sig, GFP_KERNEL); 5353 } else if (sig > high && 5354 (last_event == 0 || last_event <= high)) { 5355 link->u.mgd.last_cqm_event_signal = sig; 5356 ieee80211_cqm_rssi_notify( 5357 &sdata->vif, 5358 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5359 sig, GFP_KERNEL); 5360 } 5361 } 5362 } 5363 5364 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5365 struct cfg80211_bss *bss) 5366 { 5367 if (ether_addr_equal(tx_bssid, bss->bssid)) 5368 return true; 5369 if (!bss->transmitted_bss) 5370 return false; 5371 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5372 } 5373 5374 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 5375 struct ieee80211_hdr *hdr, size_t len, 5376 struct ieee80211_rx_status *rx_status) 5377 { 5378 struct ieee80211_sub_if_data *sdata = link->sdata; 5379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5380 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5381 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5382 struct ieee80211_mgmt *mgmt = (void *) hdr; 5383 size_t baselen; 5384 struct ieee802_11_elems *elems; 5385 struct ieee80211_local *local = sdata->local; 5386 struct ieee80211_chanctx_conf *chanctx_conf; 5387 struct ieee80211_channel *chan; 5388 struct link_sta_info *link_sta; 5389 struct sta_info *sta; 5390 u32 changed = 0; 5391 bool erp_valid; 5392 u8 erp_value = 0; 5393 u32 ncrc = 0; 5394 u8 *bssid, *variable = mgmt->u.beacon.variable; 5395 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5396 struct ieee80211_elems_parse_params parse_params = { 5397 .link_id = -1, 5398 .from_ap = true, 5399 }; 5400 5401 sdata_assert_lock(sdata); 5402 5403 /* Process beacon from the current BSS */ 5404 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 5405 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 5406 struct ieee80211_ext *ext = (void *) mgmt; 5407 5408 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 5409 variable = ext->u.s1g_short_beacon.variable; 5410 else 5411 variable = ext->u.s1g_beacon.variable; 5412 } 5413 5414 baselen = (u8 *) variable - (u8 *) mgmt; 5415 if (baselen > len) 5416 return; 5417 5418 parse_params.start = variable; 5419 parse_params.len = len - baselen; 5420 5421 rcu_read_lock(); 5422 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 5423 if (!chanctx_conf) { 5424 rcu_read_unlock(); 5425 return; 5426 } 5427 5428 if (ieee80211_rx_status_to_khz(rx_status) != 5429 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 5430 rcu_read_unlock(); 5431 return; 5432 } 5433 chan = chanctx_conf->def.chan; 5434 rcu_read_unlock(); 5435 5436 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 5437 !WARN_ON(sdata->vif.valid_links) && 5438 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 5439 parse_params.bss = ifmgd->assoc_data->link[0].bss; 5440 elems = ieee802_11_parse_elems_full(&parse_params); 5441 if (!elems) 5442 return; 5443 5444 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5445 5446 if (elems->dtim_period) 5447 link->u.mgd.dtim_period = elems->dtim_period; 5448 link->u.mgd.have_beacon = true; 5449 ifmgd->assoc_data->need_beacon = false; 5450 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5451 link->conf->sync_tsf = 5452 le64_to_cpu(mgmt->u.beacon.timestamp); 5453 link->conf->sync_device_ts = 5454 rx_status->device_timestamp; 5455 link->conf->sync_dtim_count = elems->dtim_count; 5456 } 5457 5458 if (elems->mbssid_config_ie) 5459 bss_conf->profile_periodicity = 5460 elems->mbssid_config_ie->profile_periodicity; 5461 else 5462 bss_conf->profile_periodicity = 0; 5463 5464 if (elems->ext_capab_len >= 11 && 5465 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5466 bss_conf->ema_ap = true; 5467 else 5468 bss_conf->ema_ap = false; 5469 5470 /* continue assoc process */ 5471 ifmgd->assoc_data->timeout = jiffies; 5472 ifmgd->assoc_data->timeout_started = true; 5473 run_again(sdata, ifmgd->assoc_data->timeout); 5474 kfree(elems); 5475 return; 5476 } 5477 5478 if (!ifmgd->associated || 5479 !ieee80211_rx_our_beacon(bssid, link->u.mgd.bss)) 5480 return; 5481 bssid = link->u.mgd.bssid; 5482 5483 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 5484 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 5485 local, rx_status); 5486 5487 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 5488 mlme_dbg_ratelimited(sdata, 5489 "cancelling AP probe due to a received beacon\n"); 5490 ieee80211_reset_ap_probe(sdata); 5491 } 5492 5493 /* 5494 * Push the beacon loss detection into the future since 5495 * we are processing a beacon from the AP just now. 5496 */ 5497 ieee80211_sta_reset_beacon_monitor(sdata); 5498 5499 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 5500 * element (which carries the beacon interval). Don't forget to add a 5501 * bit to care_about_ies[] above if mac80211 is interested in a 5502 * changing S1G element. 5503 */ 5504 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5505 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 5506 parse_params.bss = link->u.mgd.bss; 5507 parse_params.filter = care_about_ies; 5508 parse_params.crc = ncrc; 5509 elems = ieee802_11_parse_elems_full(&parse_params); 5510 if (!elems) 5511 return; 5512 ncrc = elems->crc; 5513 5514 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 5515 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 5516 if (local->hw.conf.dynamic_ps_timeout > 0) { 5517 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 5518 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 5519 ieee80211_hw_config(local, 5520 IEEE80211_CONF_CHANGE_PS); 5521 } 5522 ieee80211_send_nullfunc(local, sdata, false); 5523 } else if (!local->pspolling && sdata->u.mgd.powersave) { 5524 local->pspolling = true; 5525 5526 /* 5527 * Here is assumed that the driver will be 5528 * able to send ps-poll frame and receive a 5529 * response even though power save mode is 5530 * enabled, but some drivers might require 5531 * to disable power save here. This needs 5532 * to be investigated. 5533 */ 5534 ieee80211_send_pspoll(local, sdata); 5535 } 5536 } 5537 5538 if (sdata->vif.p2p || 5539 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 5540 struct ieee80211_p2p_noa_attr noa = {}; 5541 int ret; 5542 5543 ret = cfg80211_get_p2p_attr(variable, 5544 len - baselen, 5545 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 5546 (u8 *) &noa, sizeof(noa)); 5547 if (ret >= 2) { 5548 if (link->u.mgd.p2p_noa_index != noa.index) { 5549 /* valid noa_attr and index changed */ 5550 link->u.mgd.p2p_noa_index = noa.index; 5551 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 5552 changed |= BSS_CHANGED_P2P_PS; 5553 /* 5554 * make sure we update all information, the CRC 5555 * mechanism doesn't look at P2P attributes. 5556 */ 5557 link->u.mgd.beacon_crc_valid = false; 5558 } 5559 } else if (link->u.mgd.p2p_noa_index != -1) { 5560 /* noa_attr not found and we had valid noa_attr before */ 5561 link->u.mgd.p2p_noa_index = -1; 5562 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 5563 changed |= BSS_CHANGED_P2P_PS; 5564 link->u.mgd.beacon_crc_valid = false; 5565 } 5566 } 5567 5568 if (link->u.mgd.csa_waiting_bcn) 5569 ieee80211_chswitch_post_beacon(link); 5570 5571 /* 5572 * Update beacon timing and dtim count on every beacon appearance. This 5573 * will allow the driver to use the most updated values. Do it before 5574 * comparing this one with last received beacon. 5575 * IMPORTANT: These parameters would possibly be out of sync by the time 5576 * the driver will use them. The synchronized view is currently 5577 * guaranteed only in certain callbacks. 5578 */ 5579 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 5580 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 5581 link->conf->sync_tsf = 5582 le64_to_cpu(mgmt->u.beacon.timestamp); 5583 link->conf->sync_device_ts = 5584 rx_status->device_timestamp; 5585 link->conf->sync_dtim_count = elems->dtim_count; 5586 } 5587 5588 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 5589 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 5590 goto free; 5591 link->u.mgd.beacon_crc = ncrc; 5592 link->u.mgd.beacon_crc_valid = true; 5593 5594 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5595 5596 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 5597 rx_status->device_timestamp, 5598 elems, true); 5599 5600 if (!link->u.mgd.disable_wmm_tracking && 5601 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5602 elems->wmm_param_len, 5603 elems->mu_edca_param_set)) 5604 changed |= BSS_CHANGED_QOS; 5605 5606 /* 5607 * If we haven't had a beacon before, tell the driver about the 5608 * DTIM period (and beacon timing if desired) now. 5609 */ 5610 if (!link->u.mgd.have_beacon) { 5611 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 5612 bss_conf->dtim_period = elems->dtim_period ?: 1; 5613 5614 changed |= BSS_CHANGED_BEACON_INFO; 5615 link->u.mgd.have_beacon = true; 5616 5617 mutex_lock(&local->iflist_mtx); 5618 ieee80211_recalc_ps(local); 5619 mutex_unlock(&local->iflist_mtx); 5620 5621 ieee80211_recalc_ps_vif(sdata); 5622 } 5623 5624 if (elems->erp_info) { 5625 erp_valid = true; 5626 erp_value = elems->erp_info[0]; 5627 } else { 5628 erp_valid = false; 5629 } 5630 5631 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 5632 changed |= ieee80211_handle_bss_capability(link, 5633 le16_to_cpu(mgmt->u.beacon.capab_info), 5634 erp_valid, erp_value); 5635 5636 mutex_lock(&local->sta_mtx); 5637 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5638 if (WARN_ON(!sta)) 5639 goto free; 5640 link_sta = rcu_dereference_protected(sta->link[link->link_id], 5641 lockdep_is_held(&local->sta_mtx)); 5642 if (WARN_ON(!link_sta)) 5643 goto free; 5644 5645 changed |= ieee80211_recalc_twt_req(link, link_sta, elems); 5646 5647 if (ieee80211_config_bw(link, elems->ht_cap_elem, 5648 elems->vht_cap_elem, elems->ht_operation, 5649 elems->vht_operation, elems->he_operation, 5650 elems->eht_operation, 5651 elems->s1g_oper, bssid, &changed)) { 5652 mutex_unlock(&local->sta_mtx); 5653 sdata_info(sdata, 5654 "failed to follow AP %pM bandwidth change, disconnect\n", 5655 bssid); 5656 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5657 WLAN_REASON_DEAUTH_LEAVING, 5658 true, deauth_buf); 5659 ieee80211_report_disconnect(sdata, deauth_buf, 5660 sizeof(deauth_buf), true, 5661 WLAN_REASON_DEAUTH_LEAVING, 5662 false); 5663 goto free; 5664 } 5665 5666 if (sta && elems->opmode_notif) 5667 ieee80211_vht_handle_opmode(sdata, link_sta, 5668 *elems->opmode_notif, 5669 rx_status->band); 5670 mutex_unlock(&local->sta_mtx); 5671 5672 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 5673 elems->country_elem, 5674 elems->country_elem_len, 5675 elems->pwr_constr_elem, 5676 elems->cisco_dtpc_elem); 5677 5678 ieee80211_link_info_change_notify(sdata, link, changed); 5679 free: 5680 kfree(elems); 5681 } 5682 5683 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 5684 struct sk_buff *skb) 5685 { 5686 struct ieee80211_link_data *link = &sdata->deflink; 5687 struct ieee80211_rx_status *rx_status; 5688 struct ieee80211_hdr *hdr; 5689 u16 fc; 5690 5691 rx_status = (struct ieee80211_rx_status *) skb->cb; 5692 hdr = (struct ieee80211_hdr *) skb->data; 5693 fc = le16_to_cpu(hdr->frame_control); 5694 5695 sdata_lock(sdata); 5696 switch (fc & IEEE80211_FCTL_STYPE) { 5697 case IEEE80211_STYPE_S1G_BEACON: 5698 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 5699 break; 5700 } 5701 sdata_unlock(sdata); 5702 } 5703 5704 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 5705 struct sk_buff *skb) 5706 { 5707 struct ieee80211_link_data *link = &sdata->deflink; 5708 struct ieee80211_rx_status *rx_status; 5709 struct ieee80211_mgmt *mgmt; 5710 u16 fc; 5711 int ies_len; 5712 5713 rx_status = (struct ieee80211_rx_status *) skb->cb; 5714 mgmt = (struct ieee80211_mgmt *) skb->data; 5715 fc = le16_to_cpu(mgmt->frame_control); 5716 5717 sdata_lock(sdata); 5718 5719 if (rx_status->link_valid) { 5720 link = sdata_dereference(sdata->link[rx_status->link_id], 5721 sdata); 5722 if (!link) 5723 goto out; 5724 } 5725 5726 switch (fc & IEEE80211_FCTL_STYPE) { 5727 case IEEE80211_STYPE_BEACON: 5728 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 5729 skb->len, rx_status); 5730 break; 5731 case IEEE80211_STYPE_PROBE_RESP: 5732 ieee80211_rx_mgmt_probe_resp(link, skb); 5733 break; 5734 case IEEE80211_STYPE_AUTH: 5735 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 5736 break; 5737 case IEEE80211_STYPE_DEAUTH: 5738 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 5739 break; 5740 case IEEE80211_STYPE_DISASSOC: 5741 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 5742 break; 5743 case IEEE80211_STYPE_ASSOC_RESP: 5744 case IEEE80211_STYPE_REASSOC_RESP: 5745 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 5746 break; 5747 case IEEE80211_STYPE_ACTION: 5748 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 5749 struct ieee802_11_elems *elems; 5750 5751 ies_len = skb->len - 5752 offsetof(struct ieee80211_mgmt, 5753 u.action.u.chan_switch.variable); 5754 5755 if (ies_len < 0) 5756 break; 5757 5758 /* CSA IE cannot be overridden, no need for BSSID */ 5759 elems = ieee802_11_parse_elems( 5760 mgmt->u.action.u.chan_switch.variable, 5761 ies_len, true, NULL); 5762 5763 if (elems && !elems->parse_error) 5764 ieee80211_sta_process_chanswitch(link, 5765 rx_status->mactime, 5766 rx_status->device_timestamp, 5767 elems, false); 5768 kfree(elems); 5769 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 5770 struct ieee802_11_elems *elems; 5771 5772 ies_len = skb->len - 5773 offsetof(struct ieee80211_mgmt, 5774 u.action.u.ext_chan_switch.variable); 5775 5776 if (ies_len < 0) 5777 break; 5778 5779 /* 5780 * extended CSA IE can't be overridden, no need for 5781 * BSSID 5782 */ 5783 elems = ieee802_11_parse_elems( 5784 mgmt->u.action.u.ext_chan_switch.variable, 5785 ies_len, true, NULL); 5786 5787 if (elems && !elems->parse_error) { 5788 /* for the handling code pretend it was an IE */ 5789 elems->ext_chansw_ie = 5790 &mgmt->u.action.u.ext_chan_switch.data; 5791 5792 ieee80211_sta_process_chanswitch(link, 5793 rx_status->mactime, 5794 rx_status->device_timestamp, 5795 elems, false); 5796 } 5797 5798 kfree(elems); 5799 } 5800 break; 5801 } 5802 out: 5803 sdata_unlock(sdata); 5804 } 5805 5806 static void ieee80211_sta_timer(struct timer_list *t) 5807 { 5808 struct ieee80211_sub_if_data *sdata = 5809 from_timer(sdata, t, u.mgd.timer); 5810 5811 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 5812 } 5813 5814 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 5815 u8 reason, bool tx) 5816 { 5817 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5818 5819 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 5820 tx, frame_buf); 5821 5822 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5823 reason, false); 5824 } 5825 5826 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 5827 { 5828 struct ieee80211_local *local = sdata->local; 5829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5830 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 5831 u32 tx_flags = 0; 5832 u16 trans = 1; 5833 u16 status = 0; 5834 struct ieee80211_prep_tx_info info = { 5835 .subtype = IEEE80211_STYPE_AUTH, 5836 }; 5837 5838 sdata_assert_lock(sdata); 5839 5840 if (WARN_ON_ONCE(!auth_data)) 5841 return -EINVAL; 5842 5843 auth_data->tries++; 5844 5845 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 5846 sdata_info(sdata, "authentication with %pM timed out\n", 5847 auth_data->ap_addr); 5848 5849 /* 5850 * Most likely AP is not in the range so remove the 5851 * bss struct for that AP. 5852 */ 5853 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 5854 5855 return -ETIMEDOUT; 5856 } 5857 5858 if (auth_data->algorithm == WLAN_AUTH_SAE) 5859 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 5860 5861 drv_mgd_prepare_tx(local, sdata, &info); 5862 5863 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 5864 auth_data->ap_addr, auth_data->tries, 5865 IEEE80211_AUTH_MAX_TRIES); 5866 5867 auth_data->expected_transaction = 2; 5868 5869 if (auth_data->algorithm == WLAN_AUTH_SAE) { 5870 trans = auth_data->sae_trans; 5871 status = auth_data->sae_status; 5872 auth_data->expected_transaction = trans; 5873 } 5874 5875 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5876 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 5877 IEEE80211_TX_INTFL_MLME_CONN_TX; 5878 5879 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 5880 auth_data->data, auth_data->data_len, 5881 auth_data->ap_addr, auth_data->ap_addr, 5882 NULL, 0, 0, tx_flags); 5883 5884 if (tx_flags == 0) { 5885 if (auth_data->algorithm == WLAN_AUTH_SAE) 5886 auth_data->timeout = jiffies + 5887 IEEE80211_AUTH_TIMEOUT_SAE; 5888 else 5889 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 5890 } else { 5891 auth_data->timeout = 5892 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 5893 } 5894 5895 auth_data->timeout_started = true; 5896 run_again(sdata, auth_data->timeout); 5897 5898 return 0; 5899 } 5900 5901 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 5902 { 5903 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 5904 struct ieee80211_local *local = sdata->local; 5905 int ret; 5906 5907 sdata_assert_lock(sdata); 5908 5909 assoc_data->tries++; 5910 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 5911 sdata_info(sdata, "association with %pM timed out\n", 5912 assoc_data->ap_addr); 5913 5914 /* 5915 * Most likely AP is not in the range so remove the 5916 * bss struct for that AP. 5917 */ 5918 cfg80211_unlink_bss(local->hw.wiphy, 5919 assoc_data->link[assoc_data->assoc_link_id].bss); 5920 5921 return -ETIMEDOUT; 5922 } 5923 5924 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 5925 assoc_data->ap_addr, assoc_data->tries, 5926 IEEE80211_ASSOC_MAX_TRIES); 5927 ret = ieee80211_send_assoc(sdata); 5928 if (ret) 5929 return ret; 5930 5931 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 5932 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 5933 assoc_data->timeout_started = true; 5934 run_again(sdata, assoc_data->timeout); 5935 } else { 5936 assoc_data->timeout = 5937 round_jiffies_up(jiffies + 5938 IEEE80211_ASSOC_TIMEOUT_LONG); 5939 assoc_data->timeout_started = true; 5940 run_again(sdata, assoc_data->timeout); 5941 } 5942 5943 return 0; 5944 } 5945 5946 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 5947 __le16 fc, bool acked) 5948 { 5949 struct ieee80211_local *local = sdata->local; 5950 5951 sdata->u.mgd.status_fc = fc; 5952 sdata->u.mgd.status_acked = acked; 5953 sdata->u.mgd.status_received = true; 5954 5955 ieee80211_queue_work(&local->hw, &sdata->work); 5956 } 5957 5958 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 5959 { 5960 struct ieee80211_local *local = sdata->local; 5961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5962 5963 sdata_lock(sdata); 5964 5965 if (ifmgd->status_received) { 5966 __le16 fc = ifmgd->status_fc; 5967 bool status_acked = ifmgd->status_acked; 5968 5969 ifmgd->status_received = false; 5970 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 5971 if (status_acked) { 5972 if (ifmgd->auth_data->algorithm == 5973 WLAN_AUTH_SAE) 5974 ifmgd->auth_data->timeout = 5975 jiffies + 5976 IEEE80211_AUTH_TIMEOUT_SAE; 5977 else 5978 ifmgd->auth_data->timeout = 5979 jiffies + 5980 IEEE80211_AUTH_TIMEOUT_SHORT; 5981 run_again(sdata, ifmgd->auth_data->timeout); 5982 } else { 5983 ifmgd->auth_data->timeout = jiffies - 1; 5984 } 5985 ifmgd->auth_data->timeout_started = true; 5986 } else if (ifmgd->assoc_data && 5987 (ieee80211_is_assoc_req(fc) || 5988 ieee80211_is_reassoc_req(fc))) { 5989 if (status_acked) { 5990 ifmgd->assoc_data->timeout = 5991 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 5992 run_again(sdata, ifmgd->assoc_data->timeout); 5993 } else { 5994 ifmgd->assoc_data->timeout = jiffies - 1; 5995 } 5996 ifmgd->assoc_data->timeout_started = true; 5997 } 5998 } 5999 6000 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 6001 time_after(jiffies, ifmgd->auth_data->timeout)) { 6002 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 6003 /* 6004 * ok ... we waited for assoc or continuation but 6005 * userspace didn't do it, so kill the auth data 6006 */ 6007 ieee80211_destroy_auth_data(sdata, false); 6008 } else if (ieee80211_auth(sdata)) { 6009 u8 ap_addr[ETH_ALEN]; 6010 struct ieee80211_event event = { 6011 .type = MLME_EVENT, 6012 .u.mlme.data = AUTH_EVENT, 6013 .u.mlme.status = MLME_TIMEOUT, 6014 }; 6015 6016 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 6017 6018 ieee80211_destroy_auth_data(sdata, false); 6019 6020 cfg80211_auth_timeout(sdata->dev, ap_addr); 6021 drv_event_callback(sdata->local, sdata, &event); 6022 } 6023 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 6024 run_again(sdata, ifmgd->auth_data->timeout); 6025 6026 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 6027 time_after(jiffies, ifmgd->assoc_data->timeout)) { 6028 if ((ifmgd->assoc_data->need_beacon && 6029 !sdata->deflink.u.mgd.have_beacon) || 6030 ieee80211_do_assoc(sdata)) { 6031 struct ieee80211_event event = { 6032 .type = MLME_EVENT, 6033 .u.mlme.data = ASSOC_EVENT, 6034 .u.mlme.status = MLME_TIMEOUT, 6035 }; 6036 6037 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6038 drv_event_callback(sdata->local, sdata, &event); 6039 } 6040 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 6041 run_again(sdata, ifmgd->assoc_data->timeout); 6042 6043 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 6044 ifmgd->associated) { 6045 u8 *bssid = sdata->deflink.u.mgd.bssid; 6046 int max_tries; 6047 6048 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6049 max_tries = max_nullfunc_tries; 6050 else 6051 max_tries = max_probe_tries; 6052 6053 /* ACK received for nullfunc probing frame */ 6054 if (!ifmgd->probe_send_count) 6055 ieee80211_reset_ap_probe(sdata); 6056 else if (ifmgd->nullfunc_failed) { 6057 if (ifmgd->probe_send_count < max_tries) { 6058 mlme_dbg(sdata, 6059 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 6060 bssid, ifmgd->probe_send_count, 6061 max_tries); 6062 ieee80211_mgd_probe_ap_send(sdata); 6063 } else { 6064 mlme_dbg(sdata, 6065 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 6066 bssid); 6067 ieee80211_sta_connection_lost(sdata, 6068 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 6069 false); 6070 } 6071 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 6072 run_again(sdata, ifmgd->probe_timeout); 6073 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 6074 mlme_dbg(sdata, 6075 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 6076 bssid, probe_wait_ms); 6077 ieee80211_sta_connection_lost(sdata, 6078 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6079 } else if (ifmgd->probe_send_count < max_tries) { 6080 mlme_dbg(sdata, 6081 "No probe response from AP %pM after %dms, try %d/%i\n", 6082 bssid, probe_wait_ms, 6083 ifmgd->probe_send_count, max_tries); 6084 ieee80211_mgd_probe_ap_send(sdata); 6085 } else { 6086 /* 6087 * We actually lost the connection ... or did we? 6088 * Let's make sure! 6089 */ 6090 mlme_dbg(sdata, 6091 "No probe response from AP %pM after %dms, disconnecting.\n", 6092 bssid, probe_wait_ms); 6093 6094 ieee80211_sta_connection_lost(sdata, 6095 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 6096 } 6097 } 6098 6099 sdata_unlock(sdata); 6100 } 6101 6102 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 6103 { 6104 struct ieee80211_sub_if_data *sdata = 6105 from_timer(sdata, t, u.mgd.bcn_mon_timer); 6106 6107 if (WARN_ON(sdata->vif.valid_links)) 6108 return; 6109 6110 if (sdata->vif.bss_conf.csa_active && 6111 !sdata->deflink.u.mgd.csa_waiting_bcn) 6112 return; 6113 6114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 6115 return; 6116 6117 sdata->u.mgd.connection_loss = false; 6118 ieee80211_queue_work(&sdata->local->hw, 6119 &sdata->u.mgd.beacon_connection_loss_work); 6120 } 6121 6122 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 6123 { 6124 struct ieee80211_sub_if_data *sdata = 6125 from_timer(sdata, t, u.mgd.conn_mon_timer); 6126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6127 struct ieee80211_local *local = sdata->local; 6128 struct sta_info *sta; 6129 unsigned long timeout; 6130 6131 if (WARN_ON(sdata->vif.valid_links)) 6132 return; 6133 6134 if (sdata->vif.bss_conf.csa_active && 6135 !sdata->deflink.u.mgd.csa_waiting_bcn) 6136 return; 6137 6138 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6139 if (!sta) 6140 return; 6141 6142 timeout = sta->deflink.status_stats.last_ack; 6143 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 6144 timeout = sta->deflink.rx_stats.last_rx; 6145 timeout += IEEE80211_CONNECTION_IDLE_TIME; 6146 6147 /* If timeout is after now, then update timer to fire at 6148 * the later date, but do not actually probe at this time. 6149 */ 6150 if (time_is_after_jiffies(timeout)) { 6151 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 6152 return; 6153 } 6154 6155 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 6156 } 6157 6158 static void ieee80211_sta_monitor_work(struct work_struct *work) 6159 { 6160 struct ieee80211_sub_if_data *sdata = 6161 container_of(work, struct ieee80211_sub_if_data, 6162 u.mgd.monitor_work); 6163 6164 ieee80211_mgd_probe_ap(sdata, false); 6165 } 6166 6167 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 6168 { 6169 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 6170 __ieee80211_stop_poll(sdata); 6171 6172 /* let's probe the connection once */ 6173 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 6174 ieee80211_queue_work(&sdata->local->hw, 6175 &sdata->u.mgd.monitor_work); 6176 } 6177 } 6178 6179 #ifdef CONFIG_PM 6180 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 6181 { 6182 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6183 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6184 6185 sdata_lock(sdata); 6186 6187 if (ifmgd->auth_data || ifmgd->assoc_data) { 6188 const u8 *ap_addr = ifmgd->auth_data ? 6189 ifmgd->auth_data->ap_addr : 6190 ifmgd->assoc_data->ap_addr; 6191 6192 /* 6193 * If we are trying to authenticate / associate while suspending, 6194 * cfg80211 won't know and won't actually abort those attempts, 6195 * thus we need to do that ourselves. 6196 */ 6197 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 6198 IEEE80211_STYPE_DEAUTH, 6199 WLAN_REASON_DEAUTH_LEAVING, 6200 false, frame_buf); 6201 if (ifmgd->assoc_data) 6202 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6203 if (ifmgd->auth_data) 6204 ieee80211_destroy_auth_data(sdata, false); 6205 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 6206 IEEE80211_DEAUTH_FRAME_LEN, 6207 false); 6208 } 6209 6210 /* This is a bit of a hack - we should find a better and more generic 6211 * solution to this. Normally when suspending, cfg80211 will in fact 6212 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 6213 * auth (not so important) or assoc (this is the problem) process. 6214 * 6215 * As a consequence, it can happen that we are in the process of both 6216 * associating and suspending, and receive an association response 6217 * after cfg80211 has checked if it needs to disconnect, but before 6218 * we actually set the flag to drop incoming frames. This will then 6219 * cause the workqueue flush to process the association response in 6220 * the suspend, resulting in a successful association just before it 6221 * tries to remove the interface from the driver, which now though 6222 * has a channel context assigned ... this results in issues. 6223 * 6224 * To work around this (for now) simply deauth here again if we're 6225 * now connected. 6226 */ 6227 if (ifmgd->associated && !sdata->local->wowlan) { 6228 u8 bssid[ETH_ALEN]; 6229 struct cfg80211_deauth_request req = { 6230 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 6231 .bssid = bssid, 6232 }; 6233 6234 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6235 ieee80211_mgd_deauth(sdata, &req); 6236 } 6237 6238 sdata_unlock(sdata); 6239 } 6240 #endif 6241 6242 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 6243 { 6244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6245 6246 sdata_lock(sdata); 6247 if (!ifmgd->associated) { 6248 sdata_unlock(sdata); 6249 return; 6250 } 6251 6252 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 6253 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 6254 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 6255 ieee80211_sta_connection_lost(sdata, 6256 WLAN_REASON_UNSPECIFIED, 6257 true); 6258 sdata_unlock(sdata); 6259 return; 6260 } 6261 6262 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 6263 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 6264 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 6265 ieee80211_sta_connection_lost(sdata, 6266 WLAN_REASON_UNSPECIFIED, 6267 true); 6268 sdata_unlock(sdata); 6269 return; 6270 } 6271 6272 sdata_unlock(sdata); 6273 } 6274 6275 static void ieee80211_request_smps_mgd_work(struct work_struct *work) 6276 { 6277 struct ieee80211_link_data *link = 6278 container_of(work, struct ieee80211_link_data, 6279 u.mgd.request_smps_work); 6280 6281 sdata_lock(link->sdata); 6282 __ieee80211_request_smps_mgd(link->sdata, link, 6283 link->u.mgd.driver_smps_mode); 6284 sdata_unlock(link->sdata); 6285 } 6286 6287 /* interface setup */ 6288 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 6289 { 6290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6291 6292 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 6293 INIT_WORK(&ifmgd->beacon_connection_loss_work, 6294 ieee80211_beacon_connection_loss_work); 6295 INIT_WORK(&ifmgd->csa_connection_drop_work, 6296 ieee80211_csa_connection_drop_work); 6297 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 6298 ieee80211_tdls_peer_del_work); 6299 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 6300 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 6301 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 6302 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 6303 ieee80211_sta_handle_tspec_ac_params_wk); 6304 6305 ifmgd->flags = 0; 6306 ifmgd->powersave = sdata->wdev.ps; 6307 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 6308 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 6309 /* Setup TDLS data */ 6310 spin_lock_init(&ifmgd->teardown_lock); 6311 ifmgd->teardown_skb = NULL; 6312 ifmgd->orig_teardown_skb = NULL; 6313 } 6314 6315 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 6316 { 6317 struct ieee80211_sub_if_data *sdata = link->sdata; 6318 struct ieee80211_local *local = sdata->local; 6319 unsigned int link_id = link->link_id; 6320 6321 link->u.mgd.p2p_noa_index = -1; 6322 link->u.mgd.conn_flags = 0; 6323 link->conf->bssid = link->u.mgd.bssid; 6324 6325 INIT_WORK(&link->u.mgd.request_smps_work, 6326 ieee80211_request_smps_mgd_work); 6327 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 6328 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 6329 else 6330 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 6331 6332 INIT_WORK(&link->u.mgd.chswitch_work, ieee80211_chswitch_work); 6333 timer_setup(&link->u.mgd.chswitch_timer, ieee80211_chswitch_timer, 0); 6334 6335 if (sdata->u.mgd.assoc_data) 6336 ether_addr_copy(link->conf->addr, 6337 sdata->u.mgd.assoc_data->link[link_id].addr); 6338 else if (!is_valid_ether_addr(link->conf->addr)) 6339 eth_random_addr(link->conf->addr); 6340 } 6341 6342 /* scan finished notification */ 6343 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 6344 { 6345 struct ieee80211_sub_if_data *sdata; 6346 6347 /* Restart STA timers */ 6348 rcu_read_lock(); 6349 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 6350 if (ieee80211_sdata_running(sdata)) 6351 ieee80211_restart_sta_timer(sdata); 6352 } 6353 rcu_read_unlock(); 6354 } 6355 6356 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6357 u8 *dtim_count, u8 *dtim_period) 6358 { 6359 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6360 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6361 ies->len); 6362 const struct ieee80211_tim_ie *tim = NULL; 6363 const struct ieee80211_bssid_index *idx; 6364 bool valid = tim_ie && tim_ie[1] >= 2; 6365 6366 if (valid) 6367 tim = (void *)(tim_ie + 2); 6368 6369 if (dtim_count) 6370 *dtim_count = valid ? tim->dtim_count : 0; 6371 6372 if (dtim_period) 6373 *dtim_period = valid ? tim->dtim_period : 0; 6374 6375 /* Check if value is overridden by non-transmitted profile */ 6376 if (!idx_ie || idx_ie[1] < 3) 6377 return valid; 6378 6379 idx = (void *)(idx_ie + 2); 6380 6381 if (dtim_count) 6382 *dtim_count = idx->dtim_count; 6383 6384 if (dtim_period) 6385 *dtim_period = idx->dtim_period; 6386 6387 return true; 6388 } 6389 6390 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 6391 struct cfg80211_bss *cbss, s8 link_id, 6392 const u8 *ap_mld_addr, bool assoc, 6393 bool override) 6394 { 6395 struct ieee80211_local *local = sdata->local; 6396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6397 struct ieee80211_bss *bss = (void *)cbss->priv; 6398 struct sta_info *new_sta = NULL; 6399 struct ieee80211_link_data *link; 6400 bool have_sta = false; 6401 bool mlo; 6402 int err; 6403 6404 if (link_id >= 0) { 6405 mlo = true; 6406 if (WARN_ON(!ap_mld_addr)) 6407 return -EINVAL; 6408 err = ieee80211_vif_set_links(sdata, BIT(link_id)); 6409 } else { 6410 if (WARN_ON(ap_mld_addr)) 6411 return -EINVAL; 6412 ap_mld_addr = cbss->bssid; 6413 err = ieee80211_vif_set_links(sdata, 0); 6414 link_id = 0; 6415 mlo = false; 6416 } 6417 6418 if (err) 6419 return err; 6420 6421 link = sdata_dereference(sdata->link[link_id], sdata); 6422 if (WARN_ON(!link)) { 6423 err = -ENOLINK; 6424 goto out_err; 6425 } 6426 6427 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 6428 err = -EINVAL; 6429 goto out_err; 6430 } 6431 6432 /* If a reconfig is happening, bail out */ 6433 if (local->in_reconfig) { 6434 err = -EBUSY; 6435 goto out_err; 6436 } 6437 6438 if (assoc) { 6439 rcu_read_lock(); 6440 have_sta = sta_info_get(sdata, ap_mld_addr); 6441 rcu_read_unlock(); 6442 } 6443 6444 if (!have_sta) { 6445 if (mlo) 6446 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 6447 link_id, cbss->bssid, 6448 GFP_KERNEL); 6449 else 6450 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 6451 6452 if (!new_sta) { 6453 err = -ENOMEM; 6454 goto out_err; 6455 } 6456 6457 new_sta->sta.mlo = mlo; 6458 } 6459 6460 /* 6461 * Set up the information for the new channel before setting the 6462 * new channel. We can't - completely race-free - change the basic 6463 * rates bitmap and the channel (sband) that it refers to, but if 6464 * we set it up before we at least avoid calling into the driver's 6465 * bss_info_changed() method with invalid information (since we do 6466 * call that from changing the channel - only for IDLE and perhaps 6467 * some others, but ...). 6468 * 6469 * So to avoid that, just set up all the new information before the 6470 * channel, but tell the driver to apply it only afterwards, since 6471 * it might need the new channel for that. 6472 */ 6473 if (new_sta) { 6474 const struct cfg80211_bss_ies *ies; 6475 struct link_sta_info *link_sta; 6476 6477 rcu_read_lock(); 6478 link_sta = rcu_dereference(new_sta->link[link_id]); 6479 if (WARN_ON(!link_sta)) { 6480 rcu_read_unlock(); 6481 sta_info_free(local, new_sta); 6482 err = -EINVAL; 6483 goto out_err; 6484 } 6485 6486 err = ieee80211_mgd_setup_link_sta(link, new_sta, 6487 link_sta, cbss); 6488 if (err) { 6489 rcu_read_unlock(); 6490 sta_info_free(local, new_sta); 6491 goto out_err; 6492 } 6493 6494 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 6495 6496 /* set timing information */ 6497 link->conf->beacon_int = cbss->beacon_interval; 6498 ies = rcu_dereference(cbss->beacon_ies); 6499 if (ies) { 6500 link->conf->sync_tsf = ies->tsf; 6501 link->conf->sync_device_ts = 6502 bss->device_ts_beacon; 6503 6504 ieee80211_get_dtim(ies, 6505 &link->conf->sync_dtim_count, 6506 NULL); 6507 } else if (!ieee80211_hw_check(&sdata->local->hw, 6508 TIMING_BEACON_ONLY)) { 6509 ies = rcu_dereference(cbss->proberesp_ies); 6510 /* must be non-NULL since beacon IEs were NULL */ 6511 link->conf->sync_tsf = ies->tsf; 6512 link->conf->sync_device_ts = 6513 bss->device_ts_presp; 6514 link->conf->sync_dtim_count = 0; 6515 } else { 6516 link->conf->sync_tsf = 0; 6517 link->conf->sync_device_ts = 0; 6518 link->conf->sync_dtim_count = 0; 6519 } 6520 rcu_read_unlock(); 6521 } 6522 6523 if (new_sta || override) { 6524 err = ieee80211_prep_channel(sdata, link, cbss, 6525 &link->u.mgd.conn_flags); 6526 if (err) { 6527 if (new_sta) 6528 sta_info_free(local, new_sta); 6529 goto out_err; 6530 } 6531 } 6532 6533 if (new_sta) { 6534 /* 6535 * tell driver about BSSID, basic rates and timing 6536 * this was set up above, before setting the channel 6537 */ 6538 ieee80211_link_info_change_notify(sdata, link, 6539 BSS_CHANGED_BSSID | 6540 BSS_CHANGED_BASIC_RATES | 6541 BSS_CHANGED_BEACON_INT); 6542 6543 if (assoc) 6544 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 6545 6546 err = sta_info_insert(new_sta); 6547 new_sta = NULL; 6548 if (err) { 6549 sdata_info(sdata, 6550 "failed to insert STA entry for the AP (error %d)\n", 6551 err); 6552 goto out_err; 6553 } 6554 } else 6555 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 6556 6557 /* Cancel scan to ensure that nothing interferes with connection */ 6558 if (local->scanning) 6559 ieee80211_scan_cancel(local); 6560 6561 return 0; 6562 6563 out_err: 6564 ieee80211_link_release_channel(&sdata->deflink); 6565 ieee80211_vif_set_links(sdata, 0); 6566 return err; 6567 } 6568 6569 /* config hooks */ 6570 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 6571 struct cfg80211_auth_request *req) 6572 { 6573 struct ieee80211_local *local = sdata->local; 6574 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6575 struct ieee80211_mgd_auth_data *auth_data; 6576 u16 auth_alg; 6577 int err; 6578 bool cont_auth; 6579 6580 /* prepare auth data structure */ 6581 6582 switch (req->auth_type) { 6583 case NL80211_AUTHTYPE_OPEN_SYSTEM: 6584 auth_alg = WLAN_AUTH_OPEN; 6585 break; 6586 case NL80211_AUTHTYPE_SHARED_KEY: 6587 if (fips_enabled) 6588 return -EOPNOTSUPP; 6589 auth_alg = WLAN_AUTH_SHARED_KEY; 6590 break; 6591 case NL80211_AUTHTYPE_FT: 6592 auth_alg = WLAN_AUTH_FT; 6593 break; 6594 case NL80211_AUTHTYPE_NETWORK_EAP: 6595 auth_alg = WLAN_AUTH_LEAP; 6596 break; 6597 case NL80211_AUTHTYPE_SAE: 6598 auth_alg = WLAN_AUTH_SAE; 6599 break; 6600 case NL80211_AUTHTYPE_FILS_SK: 6601 auth_alg = WLAN_AUTH_FILS_SK; 6602 break; 6603 case NL80211_AUTHTYPE_FILS_SK_PFS: 6604 auth_alg = WLAN_AUTH_FILS_SK_PFS; 6605 break; 6606 case NL80211_AUTHTYPE_FILS_PK: 6607 auth_alg = WLAN_AUTH_FILS_PK; 6608 break; 6609 default: 6610 return -EOPNOTSUPP; 6611 } 6612 6613 if (ifmgd->assoc_data) 6614 return -EBUSY; 6615 6616 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 6617 req->ie_len, GFP_KERNEL); 6618 if (!auth_data) 6619 return -ENOMEM; 6620 6621 memcpy(auth_data->ap_addr, 6622 req->ap_mld_addr ?: req->bss->bssid, 6623 ETH_ALEN); 6624 auth_data->bss = req->bss; 6625 6626 if (req->auth_data_len >= 4) { 6627 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 6628 __le16 *pos = (__le16 *) req->auth_data; 6629 6630 auth_data->sae_trans = le16_to_cpu(pos[0]); 6631 auth_data->sae_status = le16_to_cpu(pos[1]); 6632 } 6633 memcpy(auth_data->data, req->auth_data + 4, 6634 req->auth_data_len - 4); 6635 auth_data->data_len += req->auth_data_len - 4; 6636 } 6637 6638 /* Check if continuing authentication or trying to authenticate with the 6639 * same BSS that we were in the process of authenticating with and avoid 6640 * removal and re-addition of the STA entry in 6641 * ieee80211_prep_connection(). 6642 */ 6643 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 6644 6645 if (req->ie && req->ie_len) { 6646 memcpy(&auth_data->data[auth_data->data_len], 6647 req->ie, req->ie_len); 6648 auth_data->data_len += req->ie_len; 6649 } 6650 6651 if (req->key && req->key_len) { 6652 auth_data->key_len = req->key_len; 6653 auth_data->key_idx = req->key_idx; 6654 memcpy(auth_data->key, req->key, req->key_len); 6655 } 6656 6657 auth_data->algorithm = auth_alg; 6658 6659 /* try to authenticate/probe */ 6660 6661 if (ifmgd->auth_data) { 6662 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 6663 auth_data->peer_confirmed = 6664 ifmgd->auth_data->peer_confirmed; 6665 } 6666 ieee80211_destroy_auth_data(sdata, cont_auth); 6667 } 6668 6669 /* prep auth_data so we don't go into idle on disassoc */ 6670 ifmgd->auth_data = auth_data; 6671 6672 /* If this is continuation of an ongoing SAE authentication exchange 6673 * (i.e., request to send SAE Confirm) and the peer has already 6674 * confirmed, mark authentication completed since we are about to send 6675 * out SAE Confirm. 6676 */ 6677 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 6678 auth_data->peer_confirmed && auth_data->sae_trans == 2) 6679 ieee80211_mark_sta_auth(sdata); 6680 6681 if (ifmgd->associated) { 6682 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6683 6684 sdata_info(sdata, 6685 "disconnect from AP %pM for new auth to %pM\n", 6686 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 6687 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6688 WLAN_REASON_UNSPECIFIED, 6689 false, frame_buf); 6690 6691 ieee80211_report_disconnect(sdata, frame_buf, 6692 sizeof(frame_buf), true, 6693 WLAN_REASON_UNSPECIFIED, 6694 false); 6695 } 6696 6697 sdata_info(sdata, "authenticate with %pM\n", auth_data->ap_addr); 6698 6699 /* needed for transmitting the auth frame(s) properly */ 6700 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 6701 6702 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 6703 req->ap_mld_addr, cont_auth, false); 6704 if (err) 6705 goto err_clear; 6706 6707 err = ieee80211_auth(sdata); 6708 if (err) { 6709 sta_info_destroy_addr(sdata, auth_data->ap_addr); 6710 goto err_clear; 6711 } 6712 6713 /* hold our own reference */ 6714 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 6715 return 0; 6716 6717 err_clear: 6718 if (!sdata->vif.valid_links) { 6719 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6720 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 6721 BSS_CHANGED_BSSID); 6722 mutex_lock(&sdata->local->mtx); 6723 ieee80211_link_release_channel(&sdata->deflink); 6724 mutex_unlock(&sdata->local->mtx); 6725 } 6726 ifmgd->auth_data = NULL; 6727 kfree(auth_data); 6728 return err; 6729 } 6730 6731 static ieee80211_conn_flags_t 6732 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 6733 struct ieee80211_mgd_assoc_data *assoc_data, 6734 struct cfg80211_assoc_request *req, 6735 ieee80211_conn_flags_t conn_flags, 6736 unsigned int link_id) 6737 { 6738 struct ieee80211_local *local = sdata->local; 6739 const struct cfg80211_bss_ies *beacon_ies; 6740 struct ieee80211_supported_band *sband; 6741 const struct element *ht_elem, *vht_elem; 6742 struct ieee80211_link_data *link; 6743 struct cfg80211_bss *cbss; 6744 struct ieee80211_bss *bss; 6745 bool is_5ghz, is_6ghz; 6746 6747 cbss = assoc_data->link[link_id].bss; 6748 if (WARN_ON(!cbss)) 6749 return 0; 6750 6751 bss = (void *)cbss->priv; 6752 6753 sband = local->hw.wiphy->bands[cbss->channel->band]; 6754 if (WARN_ON(!sband)) 6755 return 0; 6756 6757 link = sdata_dereference(sdata->link[link_id], sdata); 6758 if (WARN_ON(!link)) 6759 return 0; 6760 6761 is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 6762 is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6763 6764 /* for MLO connections assume advertising all rates is OK */ 6765 if (!req->ap_mld_addr) { 6766 assoc_data->supp_rates = bss->supp_rates; 6767 assoc_data->supp_rates_len = bss->supp_rates_len; 6768 } 6769 6770 /* copy and link elems for the STA profile */ 6771 if (req->links[link_id].elems_len) { 6772 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 6773 req->links[link_id].elems_len); 6774 assoc_data->link[link_id].elems = assoc_data->ie_pos; 6775 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 6776 assoc_data->ie_pos += req->links[link_id].elems_len; 6777 } 6778 6779 rcu_read_lock(); 6780 ht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 6781 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6782 assoc_data->link[link_id].ap_ht_param = 6783 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6784 else if (!is_6ghz) 6785 conn_flags |= IEEE80211_CONN_DISABLE_HT; 6786 vht_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 6787 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6788 memcpy(&assoc_data->link[link_id].ap_vht_cap, vht_elem->data, 6789 sizeof(struct ieee80211_vht_cap)); 6790 } else if (is_5ghz) { 6791 link_info(link, 6792 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6793 conn_flags |= IEEE80211_CONN_DISABLE_VHT | 6794 IEEE80211_CONN_DISABLE_HE | 6795 IEEE80211_CONN_DISABLE_EHT; 6796 } 6797 rcu_read_unlock(); 6798 6799 link->u.mgd.beacon_crc_valid = false; 6800 link->u.mgd.dtim_period = 0; 6801 link->u.mgd.have_beacon = false; 6802 6803 /* override HT/VHT configuration only if the AP and we support it */ 6804 if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) { 6805 struct ieee80211_sta_ht_cap sta_ht_cap; 6806 6807 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6808 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6809 } 6810 6811 rcu_read_lock(); 6812 beacon_ies = rcu_dereference(cbss->beacon_ies); 6813 if (beacon_ies) { 6814 const struct element *elem; 6815 u8 dtim_count = 0; 6816 6817 ieee80211_get_dtim(beacon_ies, &dtim_count, 6818 &link->u.mgd.dtim_period); 6819 6820 sdata->deflink.u.mgd.have_beacon = true; 6821 6822 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6823 link->conf->sync_tsf = beacon_ies->tsf; 6824 link->conf->sync_device_ts = bss->device_ts_beacon; 6825 link->conf->sync_dtim_count = dtim_count; 6826 } 6827 6828 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6829 beacon_ies->data, beacon_ies->len); 6830 if (elem && elem->datalen >= 3) 6831 link->conf->profile_periodicity = elem->data[2]; 6832 else 6833 link->conf->profile_periodicity = 0; 6834 6835 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6836 beacon_ies->data, beacon_ies->len); 6837 if (elem && elem->datalen >= 11 && 6838 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6839 link->conf->ema_ap = true; 6840 else 6841 link->conf->ema_ap = false; 6842 } 6843 rcu_read_unlock(); 6844 6845 if (bss->corrupt_data) { 6846 char *corrupt_type = "data"; 6847 6848 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6849 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6850 corrupt_type = "beacon and probe response"; 6851 else 6852 corrupt_type = "beacon"; 6853 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 6854 corrupt_type = "probe response"; 6855 } 6856 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 6857 cbss->bssid, corrupt_type); 6858 } 6859 6860 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 6861 if (sdata->u.mgd.powersave) 6862 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 6863 else 6864 link->smps_mode = IEEE80211_SMPS_OFF; 6865 } else { 6866 link->smps_mode = link->u.mgd.req_smps; 6867 } 6868 6869 return conn_flags; 6870 } 6871 6872 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 6873 struct cfg80211_assoc_request *req) 6874 { 6875 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 6876 struct ieee80211_local *local = sdata->local; 6877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6878 struct ieee80211_mgd_assoc_data *assoc_data; 6879 const struct element *ssid_elem; 6880 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6881 ieee80211_conn_flags_t conn_flags = 0; 6882 struct ieee80211_link_data *link; 6883 struct cfg80211_bss *cbss; 6884 struct ieee80211_bss *bss; 6885 bool override; 6886 int i, err; 6887 size_t size = sizeof(*assoc_data) + req->ie_len; 6888 6889 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 6890 size += req->links[i].elems_len; 6891 6892 if (req->ap_mld_addr) { 6893 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 6894 if (!req->links[i].bss) 6895 continue; 6896 if (i == assoc_link_id) 6897 continue; 6898 /* 6899 * For now, support only a single link in MLO, we 6900 * don't have the necessary parsing of the multi- 6901 * link element in the association response, etc. 6902 */ 6903 sdata_info(sdata, 6904 "refusing MLO association with >1 links\n"); 6905 return -EINVAL; 6906 } 6907 } 6908 6909 /* FIXME: no support for 4-addr MLO yet */ 6910 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 6911 return -EOPNOTSUPP; 6912 6913 assoc_data = kzalloc(size, GFP_KERNEL); 6914 if (!assoc_data) 6915 return -ENOMEM; 6916 6917 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 6918 6919 rcu_read_lock(); 6920 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 6921 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 6922 rcu_read_unlock(); 6923 kfree(assoc_data); 6924 return -EINVAL; 6925 } 6926 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 6927 assoc_data->ssid_len = ssid_elem->datalen; 6928 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 6929 vif_cfg->ssid_len = assoc_data->ssid_len; 6930 rcu_read_unlock(); 6931 6932 if (req->ap_mld_addr) { 6933 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 6934 if (!req->links[i].bss) 6935 continue; 6936 link = sdata_dereference(sdata->link[i], sdata); 6937 if (link) 6938 ether_addr_copy(assoc_data->link[i].addr, 6939 link->conf->addr); 6940 else 6941 eth_random_addr(assoc_data->link[i].addr); 6942 } 6943 } else { 6944 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 6945 } 6946 6947 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 6948 6949 memcpy(assoc_data->ap_addr, 6950 req->ap_mld_addr ?: req->bss->bssid, 6951 ETH_ALEN); 6952 6953 if (ifmgd->associated) { 6954 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6955 6956 sdata_info(sdata, 6957 "disconnect from AP %pM for new assoc to %pM\n", 6958 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 6959 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6960 WLAN_REASON_UNSPECIFIED, 6961 false, frame_buf); 6962 6963 ieee80211_report_disconnect(sdata, frame_buf, 6964 sizeof(frame_buf), true, 6965 WLAN_REASON_UNSPECIFIED, 6966 false); 6967 } 6968 6969 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 6970 err = -EBUSY; 6971 goto err_free; 6972 } 6973 6974 if (ifmgd->assoc_data) { 6975 err = -EBUSY; 6976 goto err_free; 6977 } 6978 6979 if (ifmgd->auth_data) { 6980 bool match; 6981 6982 /* keep sta info, bssid if matching */ 6983 match = ether_addr_equal(ifmgd->auth_data->ap_addr, 6984 assoc_data->ap_addr); 6985 ieee80211_destroy_auth_data(sdata, match); 6986 } 6987 6988 /* prepare assoc data */ 6989 6990 bss = (void *)cbss->priv; 6991 assoc_data->wmm = bss->wmm_used && 6992 (local->hw.queues >= IEEE80211_NUM_ACS); 6993 6994 /* 6995 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 6996 * We still associate in non-HT mode (11a/b/g) if any one of these 6997 * ciphers is configured as pairwise. 6998 * We can set this to true for non-11n hardware, that'll be checked 6999 * separately along with the peer capabilities. 7000 */ 7001 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 7002 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 7003 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 7004 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 7005 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7006 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7007 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7008 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7009 netdev_info(sdata->dev, 7010 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 7011 } 7012 } 7013 7014 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 7015 if (!bss->wmm_used) { 7016 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7017 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7018 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7019 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7020 netdev_info(sdata->dev, 7021 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 7022 } 7023 7024 if (req->flags & ASSOC_REQ_DISABLE_HT) { 7025 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 7026 conn_flags |= IEEE80211_CONN_DISABLE_HT; 7027 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7028 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7029 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7030 } 7031 7032 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 7033 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 7034 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 7035 } 7036 7037 if (req->flags & ASSOC_REQ_DISABLE_HE) { 7038 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 7039 conn_flags |= IEEE80211_CONN_DISABLE_HE; 7040 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7041 } 7042 7043 if (req->flags & ASSOC_REQ_DISABLE_EHT) 7044 conn_flags |= IEEE80211_CONN_DISABLE_EHT; 7045 7046 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 7047 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 7048 sizeof(ifmgd->ht_capa_mask)); 7049 7050 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 7051 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 7052 sizeof(ifmgd->vht_capa_mask)); 7053 7054 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 7055 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 7056 sizeof(ifmgd->s1g_capa_mask)); 7057 7058 if (req->ie && req->ie_len) { 7059 memcpy(assoc_data->ie, req->ie, req->ie_len); 7060 assoc_data->ie_len = req->ie_len; 7061 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 7062 } else { 7063 assoc_data->ie_pos = assoc_data->ie; 7064 } 7065 7066 if (req->fils_kek) { 7067 /* should already be checked in cfg80211 - so warn */ 7068 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 7069 err = -EINVAL; 7070 goto err_free; 7071 } 7072 memcpy(assoc_data->fils_kek, req->fils_kek, 7073 req->fils_kek_len); 7074 assoc_data->fils_kek_len = req->fils_kek_len; 7075 } 7076 7077 if (req->fils_nonces) 7078 memcpy(assoc_data->fils_nonces, req->fils_nonces, 7079 2 * FILS_NONCE_LEN); 7080 7081 /* default timeout */ 7082 assoc_data->timeout = jiffies; 7083 assoc_data->timeout_started = true; 7084 7085 assoc_data->assoc_link_id = assoc_link_id; 7086 7087 if (req->ap_mld_addr) { 7088 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7089 assoc_data->link[i].conn_flags = conn_flags; 7090 assoc_data->link[i].bss = req->links[i].bss; 7091 } 7092 7093 /* if there was no authentication, set up the link */ 7094 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id)); 7095 if (err) 7096 goto err_clear; 7097 } else { 7098 assoc_data->link[0].conn_flags = conn_flags; 7099 assoc_data->link[0].bss = cbss; 7100 } 7101 7102 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 7103 if (WARN_ON(!link)) { 7104 err = -EINVAL; 7105 goto err_clear; 7106 } 7107 7108 /* keep old conn_flags from ieee80211_prep_channel() from auth */ 7109 conn_flags |= link->u.mgd.conn_flags; 7110 conn_flags |= ieee80211_setup_assoc_link(sdata, assoc_data, req, 7111 conn_flags, assoc_link_id); 7112 override = link->u.mgd.conn_flags != conn_flags; 7113 link->u.mgd.conn_flags |= conn_flags; 7114 7115 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 7116 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 7117 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 7118 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 7119 7120 if (bss->wmm_used && bss->uapsd_supported && 7121 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 7122 assoc_data->uapsd = true; 7123 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 7124 } else { 7125 assoc_data->uapsd = false; 7126 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 7127 } 7128 7129 if (req->prev_bssid) 7130 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 7131 7132 if (req->use_mfp) { 7133 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 7134 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 7135 } else { 7136 ifmgd->mfp = IEEE80211_MFP_DISABLED; 7137 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 7138 } 7139 7140 if (req->flags & ASSOC_REQ_USE_RRM) 7141 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 7142 else 7143 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 7144 7145 if (req->crypto.control_port) 7146 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 7147 else 7148 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 7149 7150 sdata->control_port_protocol = req->crypto.control_port_ethertype; 7151 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 7152 sdata->control_port_over_nl80211 = 7153 req->crypto.control_port_over_nl80211; 7154 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 7155 7156 /* kick off associate process */ 7157 ifmgd->assoc_data = assoc_data; 7158 7159 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 7160 if (!assoc_data->link[i].bss) 7161 continue; 7162 if (i == assoc_data->assoc_link_id) 7163 continue; 7164 /* only calculate the flags, hence link == NULL */ 7165 err = ieee80211_prep_channel(sdata, NULL, assoc_data->link[i].bss, 7166 &assoc_data->link[i].conn_flags); 7167 if (err) 7168 goto err_clear; 7169 } 7170 7171 /* needed for transmitting the assoc frames properly */ 7172 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 7173 7174 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 7175 req->ap_mld_addr, true, override); 7176 if (err) 7177 goto err_clear; 7178 7179 assoc_data->link[assoc_data->assoc_link_id].conn_flags = 7180 link->u.mgd.conn_flags; 7181 7182 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 7183 const struct cfg80211_bss_ies *beacon_ies; 7184 7185 rcu_read_lock(); 7186 beacon_ies = rcu_dereference(req->bss->beacon_ies); 7187 7188 if (beacon_ies) { 7189 /* 7190 * Wait up to one beacon interval ... 7191 * should this be more if we miss one? 7192 */ 7193 sdata_info(sdata, "waiting for beacon from %pM\n", 7194 link->u.mgd.bssid); 7195 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 7196 assoc_data->timeout_started = true; 7197 assoc_data->need_beacon = true; 7198 } 7199 rcu_read_unlock(); 7200 } 7201 7202 run_again(sdata, assoc_data->timeout); 7203 7204 return 0; 7205 err_clear: 7206 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7207 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7208 BSS_CHANGED_BSSID); 7209 ifmgd->assoc_data = NULL; 7210 err_free: 7211 kfree(assoc_data); 7212 return err; 7213 } 7214 7215 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 7216 struct cfg80211_deauth_request *req) 7217 { 7218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7219 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7220 bool tx = !req->local_state_change; 7221 struct ieee80211_prep_tx_info info = { 7222 .subtype = IEEE80211_STYPE_DEAUTH, 7223 }; 7224 7225 if (ifmgd->auth_data && 7226 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 7227 sdata_info(sdata, 7228 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 7229 req->bssid, req->reason_code, 7230 ieee80211_get_reason_code_string(req->reason_code)); 7231 7232 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7233 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7234 IEEE80211_STYPE_DEAUTH, 7235 req->reason_code, tx, 7236 frame_buf); 7237 ieee80211_destroy_auth_data(sdata, false); 7238 ieee80211_report_disconnect(sdata, frame_buf, 7239 sizeof(frame_buf), true, 7240 req->reason_code, false); 7241 drv_mgd_complete_tx(sdata->local, sdata, &info); 7242 return 0; 7243 } 7244 7245 if (ifmgd->assoc_data && 7246 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 7247 sdata_info(sdata, 7248 "aborting association with %pM by local choice (Reason: %u=%s)\n", 7249 req->bssid, req->reason_code, 7250 ieee80211_get_reason_code_string(req->reason_code)); 7251 7252 drv_mgd_prepare_tx(sdata->local, sdata, &info); 7253 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 7254 IEEE80211_STYPE_DEAUTH, 7255 req->reason_code, tx, 7256 frame_buf); 7257 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7258 ieee80211_report_disconnect(sdata, frame_buf, 7259 sizeof(frame_buf), true, 7260 req->reason_code, false); 7261 return 0; 7262 } 7263 7264 if (ifmgd->associated && 7265 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 7266 sdata_info(sdata, 7267 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 7268 req->bssid, req->reason_code, 7269 ieee80211_get_reason_code_string(req->reason_code)); 7270 7271 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7272 req->reason_code, tx, frame_buf); 7273 ieee80211_report_disconnect(sdata, frame_buf, 7274 sizeof(frame_buf), true, 7275 req->reason_code, false); 7276 drv_mgd_complete_tx(sdata->local, sdata, &info); 7277 return 0; 7278 } 7279 7280 return -ENOTCONN; 7281 } 7282 7283 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 7284 struct cfg80211_disassoc_request *req) 7285 { 7286 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7287 7288 if (!sdata->u.mgd.associated || 7289 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 7290 return -ENOTCONN; 7291 7292 sdata_info(sdata, 7293 "disassociating from %pM by local choice (Reason: %u=%s)\n", 7294 req->ap_addr, req->reason_code, 7295 ieee80211_get_reason_code_string(req->reason_code)); 7296 7297 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 7298 req->reason_code, !req->local_state_change, 7299 frame_buf); 7300 7301 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7302 req->reason_code, false); 7303 7304 return 0; 7305 } 7306 7307 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 7308 { 7309 cancel_work_sync(&link->u.mgd.request_smps_work); 7310 cancel_work_sync(&link->u.mgd.chswitch_work); 7311 } 7312 7313 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 7314 { 7315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7316 7317 /* 7318 * Make sure some work items will not run after this, 7319 * they will not do anything but might not have been 7320 * cancelled when disconnecting. 7321 */ 7322 cancel_work_sync(&ifmgd->monitor_work); 7323 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 7324 cancel_work_sync(&ifmgd->csa_connection_drop_work); 7325 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 7326 7327 sdata_lock(sdata); 7328 if (ifmgd->assoc_data) 7329 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7330 if (ifmgd->auth_data) 7331 ieee80211_destroy_auth_data(sdata, false); 7332 spin_lock_bh(&ifmgd->teardown_lock); 7333 if (ifmgd->teardown_skb) { 7334 kfree_skb(ifmgd->teardown_skb); 7335 ifmgd->teardown_skb = NULL; 7336 ifmgd->orig_teardown_skb = NULL; 7337 } 7338 kfree(ifmgd->assoc_req_ies); 7339 ifmgd->assoc_req_ies = NULL; 7340 ifmgd->assoc_req_ies_len = 0; 7341 spin_unlock_bh(&ifmgd->teardown_lock); 7342 del_timer_sync(&ifmgd->timer); 7343 sdata_unlock(sdata); 7344 } 7345 7346 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 7347 enum nl80211_cqm_rssi_threshold_event rssi_event, 7348 s32 rssi_level, 7349 gfp_t gfp) 7350 { 7351 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7352 7353 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 7354 7355 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 7356 } 7357 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 7358 7359 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 7360 { 7361 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7362 7363 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 7364 7365 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 7366 } 7367 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 7368 7369 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 7370 int rssi_min_thold, 7371 int rssi_max_thold) 7372 { 7373 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 7374 7375 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 7376 return; 7377 7378 /* 7379 * Scale up threshold values before storing it, as the RSSI averaging 7380 * algorithm uses a scaled up value as well. Change this scaling 7381 * factor if the RSSI averaging algorithm changes. 7382 */ 7383 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 7384 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 7385 } 7386 7387 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 7388 int rssi_min_thold, 7389 int rssi_max_thold) 7390 { 7391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7392 7393 WARN_ON(rssi_min_thold == rssi_max_thold || 7394 rssi_min_thold > rssi_max_thold); 7395 7396 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 7397 rssi_max_thold); 7398 } 7399 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 7400 7401 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 7402 { 7403 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7404 7405 _ieee80211_enable_rssi_reports(sdata, 0, 0); 7406 } 7407 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 7408