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 - 2020 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_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 const struct ieee80211_s1g_oper_ie *s1g_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->freq1_offset = channel->freq_offset; 165 166 if (channel->band == NL80211_BAND_6GHZ) { 167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) 168 ret = IEEE80211_STA_DISABLE_HT | 169 IEEE80211_STA_DISABLE_VHT | 170 IEEE80211_STA_DISABLE_HE; 171 else 172 ret = 0; 173 vht_chandef = *chandef; 174 goto out; 175 } else if (sband->band == NL80211_BAND_S1GHZ) { 176 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 177 sdata_info(sdata, 178 "Missing S1G Operation Element? Trying operating == primary\n"); 179 chandef->width = ieee80211_s1g_channel_width(channel); 180 } 181 182 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 183 IEEE80211_STA_DISABLE_VHT | 184 IEEE80211_STA_DISABLE_80P80MHZ | 185 IEEE80211_STA_DISABLE_160MHZ; 186 goto out; 187 } 188 189 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 191 192 if (!ht_oper || !sta_ht_cap.ht_supported) { 193 ret = IEEE80211_STA_DISABLE_HT | 194 IEEE80211_STA_DISABLE_VHT | 195 IEEE80211_STA_DISABLE_HE; 196 goto out; 197 } 198 199 chandef->width = NL80211_CHAN_WIDTH_20; 200 201 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 202 channel->band); 203 /* check that channel matches the right operating channel */ 204 if (!tracking && channel->center_freq != ht_cfreq) { 205 /* 206 * It's possible that some APs are confused here; 207 * Netgear WNDR3700 sometimes reports 4 higher than 208 * the actual channel in association responses, but 209 * since we look at probe response/beacon data here 210 * it should be OK. 211 */ 212 sdata_info(sdata, 213 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 214 channel->center_freq, ht_cfreq, 215 ht_oper->primary_chan, channel->band); 216 ret = IEEE80211_STA_DISABLE_HT | 217 IEEE80211_STA_DISABLE_VHT | 218 IEEE80211_STA_DISABLE_HE; 219 goto out; 220 } 221 222 /* check 40 MHz support, if we have it */ 223 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 224 ieee80211_chandef_ht_oper(ht_oper, chandef); 225 } else { 226 /* 40 MHz (and 80 MHz) must be supported for VHT */ 227 ret = IEEE80211_STA_DISABLE_VHT; 228 /* also mark 40 MHz disabled */ 229 ret |= IEEE80211_STA_DISABLE_40MHZ; 230 goto out; 231 } 232 233 if (!vht_oper || !sband->vht_cap.vht_supported) { 234 ret = IEEE80211_STA_DISABLE_VHT; 235 goto out; 236 } 237 238 vht_chandef = *chandef; 239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 240 (le32_to_cpu(he_oper->he_oper_params) & 241 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 242 struct ieee80211_vht_operation he_oper_vht_cap; 243 244 /* 245 * Set only first 3 bytes (other 2 aren't used in 246 * ieee80211_chandef_vht_oper() anyway) 247 */ 248 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 249 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 250 251 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 252 &he_oper_vht_cap, ht_oper, 253 &vht_chandef)) { 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 255 sdata_info(sdata, 256 "HE AP VHT information is invalid, disable HE\n"); 257 ret = IEEE80211_STA_DISABLE_HE; 258 goto out; 259 } 260 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 261 vht_cap_info, 262 vht_oper, ht_oper, 263 &vht_chandef)) { 264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 265 sdata_info(sdata, 266 "AP VHT information is invalid, disable VHT\n"); 267 ret = IEEE80211_STA_DISABLE_VHT; 268 goto out; 269 } 270 271 if (!cfg80211_chandef_valid(&vht_chandef)) { 272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 273 sdata_info(sdata, 274 "AP VHT information is invalid, disable VHT\n"); 275 ret = IEEE80211_STA_DISABLE_VHT; 276 goto out; 277 } 278 279 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 280 ret = 0; 281 goto out; 282 } 283 284 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 285 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 286 sdata_info(sdata, 287 "AP VHT information doesn't match HT, disable VHT\n"); 288 ret = IEEE80211_STA_DISABLE_VHT; 289 goto out; 290 } 291 292 *chandef = vht_chandef; 293 294 ret = 0; 295 296 out: 297 /* 298 * When tracking the current AP, don't do any further checks if the 299 * new chandef is identical to the one we're currently using for the 300 * connection. This keeps us from playing ping-pong with regulatory, 301 * without it the following can happen (for example): 302 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 303 * - AP advertises regdom US 304 * - CRDA loads regdom US with 80 MHz prohibited (old database) 305 * - the code below detects an unsupported channel, downgrades, and 306 * we disconnect from the AP in the caller 307 * - disconnect causes CRDA to reload world regdomain and the game 308 * starts anew. 309 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 310 * 311 * It seems possible that there are still scenarios with CSA or real 312 * bandwidth changes where a this could happen, but those cases are 313 * less common and wouldn't completely prevent using the AP. 314 */ 315 if (tracking && 316 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 317 return ret; 318 319 /* don't print the message below for VHT mismatch if VHT is disabled */ 320 if (ret & IEEE80211_STA_DISABLE_VHT) 321 vht_chandef = *chandef; 322 323 /* 324 * Ignore the DISABLED flag when we're already connected and only 325 * tracking the APs beacon for bandwidth changes - otherwise we 326 * might get disconnected here if we connect to an AP, update our 327 * regulatory information based on the AP's country IE and the 328 * information we have is wrong/outdated and disables the channel 329 * that we're actually using for the connection to the AP. 330 */ 331 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 332 tracking ? 0 : 333 IEEE80211_CHAN_DISABLED)) { 334 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 335 ret = IEEE80211_STA_DISABLE_HT | 336 IEEE80211_STA_DISABLE_VHT | 337 IEEE80211_STA_DISABLE_HE; 338 break; 339 } 340 341 ret |= ieee80211_chandef_downgrade(chandef); 342 } 343 344 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 345 IEEE80211_CHAN_NO_HE)) 346 ret |= IEEE80211_STA_DISABLE_HE; 347 348 if (chandef->width != vht_chandef.width && !tracking) 349 sdata_info(sdata, 350 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 351 352 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 353 return ret; 354 } 355 356 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 357 struct sta_info *sta, 358 const struct ieee80211_ht_cap *ht_cap, 359 const struct ieee80211_vht_cap *vht_cap, 360 const struct ieee80211_ht_operation *ht_oper, 361 const struct ieee80211_vht_operation *vht_oper, 362 const struct ieee80211_he_operation *he_oper, 363 const struct ieee80211_s1g_oper_ie *s1g_oper, 364 const u8 *bssid, u32 *changed) 365 { 366 struct ieee80211_local *local = sdata->local; 367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 368 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 369 struct ieee80211_supported_band *sband = 370 local->hw.wiphy->bands[chan->band]; 371 struct cfg80211_chan_def chandef; 372 u16 ht_opmode; 373 u32 flags; 374 enum ieee80211_sta_rx_bandwidth new_sta_bw; 375 u32 vht_cap_info = 0; 376 int ret; 377 378 /* if HT was/is disabled, don't track any bandwidth changes */ 379 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 380 return 0; 381 382 /* don't check VHT if we associated as non-VHT station */ 383 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 384 vht_oper = NULL; 385 386 /* don't check HE if we associated as non-HE station */ 387 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 388 !ieee80211_get_he_sta_cap(sband)) 389 he_oper = NULL; 390 391 if (WARN_ON_ONCE(!sta)) 392 return -EINVAL; 393 394 /* 395 * if bss configuration changed store the new one - 396 * this may be applicable even if channel is identical 397 */ 398 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 399 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 400 *changed |= BSS_CHANGED_HT; 401 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 402 } 403 404 if (vht_cap) 405 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 406 407 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 408 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 409 ht_oper, vht_oper, he_oper, 410 s1g_oper, &chandef, true); 411 412 /* 413 * Downgrade the new channel if we associated with restricted 414 * capabilities. For example, if we associated as a 20 MHz STA 415 * to a 40 MHz AP (due to regulatory, capabilities or config 416 * reasons) then switching to a 40 MHz channel now won't do us 417 * any good -- we couldn't use it with the AP. 418 */ 419 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 420 chandef.width == NL80211_CHAN_WIDTH_80P80) 421 flags |= ieee80211_chandef_downgrade(&chandef); 422 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 423 chandef.width == NL80211_CHAN_WIDTH_160) 424 flags |= ieee80211_chandef_downgrade(&chandef); 425 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 426 chandef.width > NL80211_CHAN_WIDTH_20) 427 flags |= ieee80211_chandef_downgrade(&chandef); 428 429 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 430 return 0; 431 432 sdata_info(sdata, 433 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 434 "width %d (%d.%03d/%d MHz)\n", 435 ifmgd->bssid, chandef.chan->center_freq, 436 chandef.chan->freq_offset, chandef.width, 437 chandef.center_freq1, chandef.freq1_offset, 438 chandef.center_freq2); 439 440 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 441 IEEE80211_STA_DISABLE_VHT | 442 IEEE80211_STA_DISABLE_HE | 443 IEEE80211_STA_DISABLE_40MHZ | 444 IEEE80211_STA_DISABLE_80P80MHZ | 445 IEEE80211_STA_DISABLE_160MHZ)) || 446 !cfg80211_chandef_valid(&chandef)) { 447 sdata_info(sdata, 448 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 449 ifmgd->bssid); 450 return -EINVAL; 451 } 452 453 switch (chandef.width) { 454 case NL80211_CHAN_WIDTH_20_NOHT: 455 case NL80211_CHAN_WIDTH_20: 456 new_sta_bw = IEEE80211_STA_RX_BW_20; 457 break; 458 case NL80211_CHAN_WIDTH_40: 459 new_sta_bw = IEEE80211_STA_RX_BW_40; 460 break; 461 case NL80211_CHAN_WIDTH_80: 462 new_sta_bw = IEEE80211_STA_RX_BW_80; 463 break; 464 case NL80211_CHAN_WIDTH_80P80: 465 case NL80211_CHAN_WIDTH_160: 466 new_sta_bw = IEEE80211_STA_RX_BW_160; 467 break; 468 default: 469 return -EINVAL; 470 } 471 472 if (new_sta_bw > sta->cur_max_bandwidth) 473 new_sta_bw = sta->cur_max_bandwidth; 474 475 if (new_sta_bw < sta->sta.bandwidth) { 476 sta->sta.bandwidth = new_sta_bw; 477 rate_control_rate_update(local, sband, sta, 478 IEEE80211_RC_BW_CHANGED); 479 } 480 481 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 482 if (ret) { 483 sdata_info(sdata, 484 "AP %pM changed bandwidth to incompatible one - disconnect\n", 485 ifmgd->bssid); 486 return ret; 487 } 488 489 if (new_sta_bw > sta->sta.bandwidth) { 490 sta->sta.bandwidth = new_sta_bw; 491 rate_control_rate_update(local, sband, sta, 492 IEEE80211_RC_BW_CHANGED); 493 } 494 495 return 0; 496 } 497 498 /* frame sending functions */ 499 500 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 501 struct sk_buff *skb, u8 ap_ht_param, 502 struct ieee80211_supported_band *sband, 503 struct ieee80211_channel *channel, 504 enum ieee80211_smps_mode smps) 505 { 506 u8 *pos; 507 u32 flags = channel->flags; 508 u16 cap; 509 struct ieee80211_sta_ht_cap ht_cap; 510 511 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 512 513 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 514 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 515 516 /* determine capability flags */ 517 cap = ht_cap.cap; 518 519 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 520 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 521 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 522 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 523 cap &= ~IEEE80211_HT_CAP_SGI_40; 524 } 525 break; 526 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 527 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 528 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 529 cap &= ~IEEE80211_HT_CAP_SGI_40; 530 } 531 break; 532 } 533 534 /* 535 * If 40 MHz was disabled associate as though we weren't 536 * capable of 40 MHz -- some broken APs will never fall 537 * back to trying to transmit in 20 MHz. 538 */ 539 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 540 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 541 cap &= ~IEEE80211_HT_CAP_SGI_40; 542 } 543 544 /* set SM PS mode properly */ 545 cap &= ~IEEE80211_HT_CAP_SM_PS; 546 switch (smps) { 547 case IEEE80211_SMPS_AUTOMATIC: 548 case IEEE80211_SMPS_NUM_MODES: 549 WARN_ON(1); 550 fallthrough; 551 case IEEE80211_SMPS_OFF: 552 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 553 IEEE80211_HT_CAP_SM_PS_SHIFT; 554 break; 555 case IEEE80211_SMPS_STATIC: 556 cap |= WLAN_HT_CAP_SM_PS_STATIC << 557 IEEE80211_HT_CAP_SM_PS_SHIFT; 558 break; 559 case IEEE80211_SMPS_DYNAMIC: 560 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 561 IEEE80211_HT_CAP_SM_PS_SHIFT; 562 break; 563 } 564 565 /* reserve and fill IE */ 566 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 567 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 568 } 569 570 /* This function determines vht capability flags for the association 571 * and builds the IE. 572 * Note - the function may set the owner of the MU-MIMO capability 573 */ 574 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 575 struct sk_buff *skb, 576 struct ieee80211_supported_band *sband, 577 struct ieee80211_vht_cap *ap_vht_cap) 578 { 579 struct ieee80211_local *local = sdata->local; 580 u8 *pos; 581 u32 cap; 582 struct ieee80211_sta_vht_cap vht_cap; 583 u32 mask, ap_bf_sts, our_bf_sts; 584 585 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 586 587 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 588 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 589 590 /* determine capability flags */ 591 cap = vht_cap.cap; 592 593 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 594 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 595 596 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 597 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 598 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 599 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 600 } 601 602 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 603 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 604 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 605 } 606 607 /* 608 * Some APs apparently get confused if our capabilities are better 609 * than theirs, so restrict what we advertise in the assoc request. 610 */ 611 if (!(ap_vht_cap->vht_cap_info & 612 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 613 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 614 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 615 else if (!(ap_vht_cap->vht_cap_info & 616 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 617 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 618 619 /* 620 * If some other vif is using the MU-MIMO capablity we cannot associate 621 * using MU-MIMO - this will lead to contradictions in the group-id 622 * mechanism. 623 * Ownership is defined since association request, in order to avoid 624 * simultaneous associations with MU-MIMO. 625 */ 626 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 627 bool disable_mu_mimo = false; 628 struct ieee80211_sub_if_data *other; 629 630 list_for_each_entry_rcu(other, &local->interfaces, list) { 631 if (other->vif.mu_mimo_owner) { 632 disable_mu_mimo = true; 633 break; 634 } 635 } 636 if (disable_mu_mimo) 637 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 638 else 639 sdata->vif.mu_mimo_owner = true; 640 } 641 642 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 643 644 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 645 our_bf_sts = cap & mask; 646 647 if (ap_bf_sts < our_bf_sts) { 648 cap &= ~mask; 649 cap |= ap_bf_sts; 650 } 651 652 /* reserve and fill IE */ 653 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 654 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 655 } 656 657 /* This function determines HE capability flags for the association 658 * and builds the IE. 659 */ 660 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 661 struct sk_buff *skb, 662 struct ieee80211_supported_band *sband) 663 { 664 u8 *pos; 665 const struct ieee80211_sta_he_cap *he_cap = NULL; 666 struct ieee80211_chanctx_conf *chanctx_conf; 667 u8 he_cap_size; 668 bool reg_cap = false; 669 670 rcu_read_lock(); 671 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 672 if (!WARN_ON_ONCE(!chanctx_conf)) 673 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 674 &chanctx_conf->def, 675 IEEE80211_CHAN_NO_HE); 676 677 rcu_read_unlock(); 678 679 he_cap = ieee80211_get_he_sta_cap(sband); 680 if (!he_cap || !reg_cap) 681 return; 682 683 /* 684 * TODO: the 1 added is because this temporarily is under the EXTENSION 685 * IE. Get rid of it when it moves. 686 */ 687 he_cap_size = 688 2 + 1 + sizeof(he_cap->he_cap_elem) + 689 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 690 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 691 he_cap->he_cap_elem.phy_cap_info); 692 pos = skb_put(skb, he_cap_size); 693 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 694 695 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 696 } 697 698 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 699 { 700 struct ieee80211_local *local = sdata->local; 701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 702 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 703 struct sk_buff *skb; 704 struct ieee80211_mgmt *mgmt; 705 u8 *pos, qos_info, *ie_start; 706 size_t offset = 0, noffset; 707 int i, count, rates_len, supp_rates_len, shift; 708 u16 capab; 709 struct ieee80211_supported_band *sband; 710 struct ieee80211_chanctx_conf *chanctx_conf; 711 struct ieee80211_channel *chan; 712 u32 rates = 0; 713 __le16 listen_int; 714 struct element *ext_capa = NULL; 715 716 /* we know it's writable, cast away the const */ 717 if (assoc_data->ie_len) 718 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 719 assoc_data->ie, 720 assoc_data->ie_len); 721 722 sdata_assert_lock(sdata); 723 724 rcu_read_lock(); 725 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 726 if (WARN_ON(!chanctx_conf)) { 727 rcu_read_unlock(); 728 return; 729 } 730 chan = chanctx_conf->def.chan; 731 rcu_read_unlock(); 732 sband = local->hw.wiphy->bands[chan->band]; 733 shift = ieee80211_vif_get_shift(&sdata->vif); 734 735 if (assoc_data->supp_rates_len) { 736 /* 737 * Get all rates supported by the device and the AP as 738 * some APs don't like getting a superset of their rates 739 * in the association request (e.g. D-Link DAP 1353 in 740 * b-only mode)... 741 */ 742 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 743 assoc_data->supp_rates, 744 assoc_data->supp_rates_len, 745 &rates); 746 } else { 747 /* 748 * In case AP not provide any supported rates information 749 * before association, we send information element(s) with 750 * all rates that we support. 751 */ 752 rates_len = 0; 753 for (i = 0; i < sband->n_bitrates; i++) { 754 rates |= BIT(i); 755 rates_len++; 756 } 757 } 758 759 skb = alloc_skb(local->hw.extra_tx_headroom + 760 sizeof(*mgmt) + /* bit too much but doesn't matter */ 761 2 + assoc_data->ssid_len + /* SSID */ 762 4 + rates_len + /* (extended) rates */ 763 4 + /* power capability */ 764 2 + 2 * sband->n_channels + /* supported channels */ 765 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 766 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 767 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 768 sizeof(struct ieee80211_he_mcs_nss_supp) + 769 IEEE80211_HE_PPE_THRES_MAX_LEN + 770 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 771 assoc_data->ie_len + /* extra IEs */ 772 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 773 9, /* WMM */ 774 GFP_KERNEL); 775 if (!skb) 776 return; 777 778 skb_reserve(skb, local->hw.extra_tx_headroom); 779 780 capab = WLAN_CAPABILITY_ESS; 781 782 if (sband->band == NL80211_BAND_2GHZ) { 783 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 784 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 785 } 786 787 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 788 capab |= WLAN_CAPABILITY_PRIVACY; 789 790 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 791 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 792 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 793 794 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 795 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 796 797 mgmt = skb_put_zero(skb, 24); 798 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 799 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 800 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 801 802 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 803 ieee80211_encode_usf(local->hw.conf.listen_interval) : 804 local->hw.conf.listen_interval); 805 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 806 skb_put(skb, 10); 807 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 808 IEEE80211_STYPE_REASSOC_REQ); 809 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 810 mgmt->u.reassoc_req.listen_interval = listen_int; 811 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 812 ETH_ALEN); 813 } else { 814 skb_put(skb, 4); 815 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 816 IEEE80211_STYPE_ASSOC_REQ); 817 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 818 mgmt->u.assoc_req.listen_interval = listen_int; 819 } 820 821 /* SSID */ 822 pos = skb_put(skb, 2 + assoc_data->ssid_len); 823 ie_start = pos; 824 *pos++ = WLAN_EID_SSID; 825 *pos++ = assoc_data->ssid_len; 826 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 827 828 if (sband->band == NL80211_BAND_S1GHZ) 829 goto skip_rates; 830 831 /* add all rates which were marked to be used above */ 832 supp_rates_len = rates_len; 833 if (supp_rates_len > 8) 834 supp_rates_len = 8; 835 836 pos = skb_put(skb, supp_rates_len + 2); 837 *pos++ = WLAN_EID_SUPP_RATES; 838 *pos++ = supp_rates_len; 839 840 count = 0; 841 for (i = 0; i < sband->n_bitrates; i++) { 842 if (BIT(i) & rates) { 843 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 844 5 * (1 << shift)); 845 *pos++ = (u8) rate; 846 if (++count == 8) 847 break; 848 } 849 } 850 851 if (rates_len > count) { 852 pos = skb_put(skb, rates_len - count + 2); 853 *pos++ = WLAN_EID_EXT_SUPP_RATES; 854 *pos++ = rates_len - count; 855 856 for (i++; i < sband->n_bitrates; i++) { 857 if (BIT(i) & rates) { 858 int rate; 859 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 860 5 * (1 << shift)); 861 *pos++ = (u8) rate; 862 } 863 } 864 } 865 866 skip_rates: 867 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 868 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 869 pos = skb_put(skb, 4); 870 *pos++ = WLAN_EID_PWR_CAPABILITY; 871 *pos++ = 2; 872 *pos++ = 0; /* min tx power */ 873 /* max tx power */ 874 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 875 } 876 877 /* 878 * Per spec, we shouldn't include the list of channels if we advertise 879 * support for extended channel switching, but we've always done that; 880 * (for now?) apply this restriction only on the (new) 6 GHz band. 881 */ 882 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 883 (sband->band != NL80211_BAND_6GHZ || 884 !ext_capa || ext_capa->datalen < 1 || 885 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 886 /* TODO: get this in reg domain format */ 887 pos = skb_put(skb, 2 * sband->n_channels + 2); 888 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 889 *pos++ = 2 * sband->n_channels; 890 for (i = 0; i < sband->n_channels; i++) { 891 *pos++ = ieee80211_frequency_to_channel( 892 sband->channels[i].center_freq); 893 *pos++ = 1; /* one channel in the subband*/ 894 } 895 } 896 897 /* Set MBSSID support for HE AP if needed */ 898 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 899 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 900 ext_capa && ext_capa->datalen >= 3) 901 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 902 903 /* if present, add any custom IEs that go before HT */ 904 if (assoc_data->ie_len) { 905 static const u8 before_ht[] = { 906 WLAN_EID_SSID, 907 WLAN_EID_SUPP_RATES, 908 WLAN_EID_EXT_SUPP_RATES, 909 WLAN_EID_PWR_CAPABILITY, 910 WLAN_EID_SUPPORTED_CHANNELS, 911 WLAN_EID_RSN, 912 WLAN_EID_QOS_CAPA, 913 WLAN_EID_RRM_ENABLED_CAPABILITIES, 914 WLAN_EID_MOBILITY_DOMAIN, 915 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 916 WLAN_EID_RIC_DATA, /* reassoc only */ 917 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 918 }; 919 static const u8 after_ric[] = { 920 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 921 WLAN_EID_HT_CAPABILITY, 922 WLAN_EID_BSS_COEX_2040, 923 /* luckily this is almost always there */ 924 WLAN_EID_EXT_CAPABILITY, 925 WLAN_EID_QOS_TRAFFIC_CAPA, 926 WLAN_EID_TIM_BCAST_REQ, 927 WLAN_EID_INTERWORKING, 928 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 929 WLAN_EID_VHT_CAPABILITY, 930 WLAN_EID_OPMODE_NOTIF, 931 }; 932 933 noffset = ieee80211_ie_split_ric(assoc_data->ie, 934 assoc_data->ie_len, 935 before_ht, 936 ARRAY_SIZE(before_ht), 937 after_ric, 938 ARRAY_SIZE(after_ric), 939 offset); 940 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 941 offset = noffset; 942 } 943 944 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 945 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 946 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 947 948 if (sband->band != NL80211_BAND_6GHZ && 949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 950 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 951 sband, chan, sdata->smps_mode); 952 953 /* if present, add any custom IEs that go before VHT */ 954 if (assoc_data->ie_len) { 955 static const u8 before_vht[] = { 956 /* 957 * no need to list the ones split off before HT 958 * or generated here 959 */ 960 WLAN_EID_BSS_COEX_2040, 961 WLAN_EID_EXT_CAPABILITY, 962 WLAN_EID_QOS_TRAFFIC_CAPA, 963 WLAN_EID_TIM_BCAST_REQ, 964 WLAN_EID_INTERWORKING, 965 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 966 }; 967 968 /* RIC already taken above, so no need to handle here anymore */ 969 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 970 before_vht, ARRAY_SIZE(before_vht), 971 offset); 972 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 973 offset = noffset; 974 } 975 976 /* if present, add any custom IEs that go before HE */ 977 if (assoc_data->ie_len) { 978 static const u8 before_he[] = { 979 /* 980 * no need to list the ones split off before VHT 981 * or generated here 982 */ 983 WLAN_EID_OPMODE_NOTIF, 984 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 985 /* 11ai elements */ 986 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 987 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 989 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 991 /* TODO: add 11ah/11aj/11ak elements */ 992 }; 993 994 /* RIC already taken above, so no need to handle here anymore */ 995 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 996 before_he, ARRAY_SIZE(before_he), 997 offset); 998 pos = skb_put(skb, noffset - offset); 999 memcpy(pos, assoc_data->ie + offset, noffset - offset); 1000 offset = noffset; 1001 } 1002 1003 if (sband->band != NL80211_BAND_6GHZ && 1004 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1005 ieee80211_add_vht_ie(sdata, skb, sband, 1006 &assoc_data->ap_vht_cap); 1007 1008 /* 1009 * If AP doesn't support HT, mark HE as disabled. 1010 * If on the 5GHz band, make sure it supports VHT. 1011 */ 1012 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 1013 (sband->band == NL80211_BAND_5GHZ && 1014 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1015 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 1016 1017 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1018 ieee80211_add_he_ie(sdata, skb, sband); 1019 1020 /* if present, add any custom non-vendor IEs that go after HE */ 1021 if (assoc_data->ie_len) { 1022 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1023 assoc_data->ie_len, 1024 offset); 1025 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1026 offset = noffset; 1027 } 1028 1029 if (assoc_data->wmm) { 1030 if (assoc_data->uapsd) { 1031 qos_info = ifmgd->uapsd_queues; 1032 qos_info |= (ifmgd->uapsd_max_sp_len << 1033 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1034 } else { 1035 qos_info = 0; 1036 } 1037 1038 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1039 } 1040 1041 if (sband->band == NL80211_BAND_S1GHZ) { 1042 ieee80211_add_aid_request_ie(sdata, skb); 1043 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1044 } 1045 1046 /* add any remaining custom (i.e. vendor specific here) IEs */ 1047 if (assoc_data->ie_len) { 1048 noffset = assoc_data->ie_len; 1049 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1050 } 1051 1052 if (assoc_data->fils_kek_len && 1053 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1054 dev_kfree_skb(skb); 1055 return; 1056 } 1057 1058 pos = skb_tail_pointer(skb); 1059 kfree(ifmgd->assoc_req_ies); 1060 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1061 ifmgd->assoc_req_ies_len = pos - ie_start; 1062 1063 drv_mgd_prepare_tx(local, sdata, 0); 1064 1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1066 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1067 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1068 IEEE80211_TX_INTFL_MLME_CONN_TX; 1069 ieee80211_tx_skb(sdata, skb); 1070 } 1071 1072 void ieee80211_send_pspoll(struct ieee80211_local *local, 1073 struct ieee80211_sub_if_data *sdata) 1074 { 1075 struct ieee80211_pspoll *pspoll; 1076 struct sk_buff *skb; 1077 1078 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1079 if (!skb) 1080 return; 1081 1082 pspoll = (struct ieee80211_pspoll *) skb->data; 1083 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1084 1085 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1086 ieee80211_tx_skb(sdata, skb); 1087 } 1088 1089 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1090 struct ieee80211_sub_if_data *sdata, 1091 bool powersave) 1092 { 1093 struct sk_buff *skb; 1094 struct ieee80211_hdr_3addr *nullfunc; 1095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1096 1097 /* Don't send NDPs when STA is connected HE */ 1098 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1099 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1100 return; 1101 1102 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1103 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1104 if (!skb) 1105 return; 1106 1107 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1108 if (powersave) 1109 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1110 1111 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1112 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1113 1114 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1115 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1116 1117 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1118 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1119 1120 ieee80211_tx_skb(sdata, skb); 1121 } 1122 1123 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1124 struct ieee80211_sub_if_data *sdata) 1125 { 1126 struct sk_buff *skb; 1127 struct ieee80211_hdr *nullfunc; 1128 __le16 fc; 1129 1130 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1131 return; 1132 1133 /* Don't send NDPs when connected HE */ 1134 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1135 return; 1136 1137 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1138 if (!skb) 1139 return; 1140 1141 skb_reserve(skb, local->hw.extra_tx_headroom); 1142 1143 nullfunc = skb_put_zero(skb, 30); 1144 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1145 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1146 nullfunc->frame_control = fc; 1147 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1148 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1149 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1150 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1151 1152 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1153 ieee80211_tx_skb(sdata, skb); 1154 } 1155 1156 /* spectrum management related things */ 1157 static void ieee80211_chswitch_work(struct work_struct *work) 1158 { 1159 struct ieee80211_sub_if_data *sdata = 1160 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1161 struct ieee80211_local *local = sdata->local; 1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1163 int ret; 1164 1165 if (!ieee80211_sdata_running(sdata)) 1166 return; 1167 1168 sdata_lock(sdata); 1169 mutex_lock(&local->mtx); 1170 mutex_lock(&local->chanctx_mtx); 1171 1172 if (!ifmgd->associated) 1173 goto out; 1174 1175 if (!sdata->vif.csa_active) 1176 goto out; 1177 1178 /* 1179 * using reservation isn't immediate as it may be deferred until later 1180 * with multi-vif. once reservation is complete it will re-schedule the 1181 * work with no reserved_chanctx so verify chandef to check if it 1182 * completed successfully 1183 */ 1184 1185 if (sdata->reserved_chanctx) { 1186 struct ieee80211_supported_band *sband = NULL; 1187 struct sta_info *mgd_sta = NULL; 1188 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1189 1190 /* 1191 * with multi-vif csa driver may call ieee80211_csa_finish() 1192 * many times while waiting for other interfaces to use their 1193 * reservations 1194 */ 1195 if (sdata->reserved_ready) 1196 goto out; 1197 1198 if (sdata->vif.bss_conf.chandef.width != 1199 sdata->csa_chandef.width) { 1200 /* 1201 * For managed interface, we need to also update the AP 1202 * station bandwidth and align the rate scale algorithm 1203 * on the bandwidth change. Here we only consider the 1204 * bandwidth of the new channel definition (as channel 1205 * switch flow does not have the full HT/VHT/HE 1206 * information), assuming that if additional changes are 1207 * required they would be done as part of the processing 1208 * of the next beacon from the AP. 1209 */ 1210 switch (sdata->csa_chandef.width) { 1211 case NL80211_CHAN_WIDTH_20_NOHT: 1212 case NL80211_CHAN_WIDTH_20: 1213 default: 1214 bw = IEEE80211_STA_RX_BW_20; 1215 break; 1216 case NL80211_CHAN_WIDTH_40: 1217 bw = IEEE80211_STA_RX_BW_40; 1218 break; 1219 case NL80211_CHAN_WIDTH_80: 1220 bw = IEEE80211_STA_RX_BW_80; 1221 break; 1222 case NL80211_CHAN_WIDTH_80P80: 1223 case NL80211_CHAN_WIDTH_160: 1224 bw = IEEE80211_STA_RX_BW_160; 1225 break; 1226 } 1227 1228 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1229 sband = 1230 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1231 } 1232 1233 if (sdata->vif.bss_conf.chandef.width > 1234 sdata->csa_chandef.width) { 1235 mgd_sta->sta.bandwidth = bw; 1236 rate_control_rate_update(local, sband, mgd_sta, 1237 IEEE80211_RC_BW_CHANGED); 1238 } 1239 1240 ret = ieee80211_vif_use_reserved_context(sdata); 1241 if (ret) { 1242 sdata_info(sdata, 1243 "failed to use reserved channel context, disconnecting (err=%d)\n", 1244 ret); 1245 ieee80211_queue_work(&sdata->local->hw, 1246 &ifmgd->csa_connection_drop_work); 1247 goto out; 1248 } 1249 1250 if (sdata->vif.bss_conf.chandef.width < 1251 sdata->csa_chandef.width) { 1252 mgd_sta->sta.bandwidth = bw; 1253 rate_control_rate_update(local, sband, mgd_sta, 1254 IEEE80211_RC_BW_CHANGED); 1255 } 1256 1257 goto out; 1258 } 1259 1260 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1261 &sdata->csa_chandef)) { 1262 sdata_info(sdata, 1263 "failed to finalize channel switch, disconnecting\n"); 1264 ieee80211_queue_work(&sdata->local->hw, 1265 &ifmgd->csa_connection_drop_work); 1266 goto out; 1267 } 1268 1269 ifmgd->csa_waiting_bcn = true; 1270 1271 ieee80211_sta_reset_beacon_monitor(sdata); 1272 ieee80211_sta_reset_conn_monitor(sdata); 1273 1274 out: 1275 mutex_unlock(&local->chanctx_mtx); 1276 mutex_unlock(&local->mtx); 1277 sdata_unlock(sdata); 1278 } 1279 1280 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1281 { 1282 struct ieee80211_local *local = sdata->local; 1283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1284 int ret; 1285 1286 sdata_assert_lock(sdata); 1287 1288 WARN_ON(!sdata->vif.csa_active); 1289 1290 if (sdata->csa_block_tx) { 1291 ieee80211_wake_vif_queues(local, sdata, 1292 IEEE80211_QUEUE_STOP_REASON_CSA); 1293 sdata->csa_block_tx = false; 1294 } 1295 1296 sdata->vif.csa_active = false; 1297 ifmgd->csa_waiting_bcn = false; 1298 1299 ret = drv_post_channel_switch(sdata); 1300 if (ret) { 1301 sdata_info(sdata, 1302 "driver post channel switch failed, disconnecting\n"); 1303 ieee80211_queue_work(&local->hw, 1304 &ifmgd->csa_connection_drop_work); 1305 return; 1306 } 1307 1308 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1309 } 1310 1311 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1312 { 1313 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1315 1316 trace_api_chswitch_done(sdata, success); 1317 if (!success) { 1318 sdata_info(sdata, 1319 "driver channel switch failed, disconnecting\n"); 1320 ieee80211_queue_work(&sdata->local->hw, 1321 &ifmgd->csa_connection_drop_work); 1322 } else { 1323 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1324 } 1325 } 1326 EXPORT_SYMBOL(ieee80211_chswitch_done); 1327 1328 static void ieee80211_chswitch_timer(struct timer_list *t) 1329 { 1330 struct ieee80211_sub_if_data *sdata = 1331 from_timer(sdata, t, u.mgd.chswitch_timer); 1332 1333 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1334 } 1335 1336 static void 1337 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1338 { 1339 struct ieee80211_local *local = sdata->local; 1340 1341 if (!local->ops->abort_channel_switch) 1342 return; 1343 1344 mutex_lock(&local->mtx); 1345 1346 mutex_lock(&local->chanctx_mtx); 1347 ieee80211_vif_unreserve_chanctx(sdata); 1348 mutex_unlock(&local->chanctx_mtx); 1349 1350 if (sdata->csa_block_tx) 1351 ieee80211_wake_vif_queues(local, sdata, 1352 IEEE80211_QUEUE_STOP_REASON_CSA); 1353 1354 sdata->csa_block_tx = false; 1355 sdata->vif.csa_active = false; 1356 1357 mutex_unlock(&local->mtx); 1358 1359 drv_abort_channel_switch(sdata); 1360 } 1361 1362 static void 1363 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1364 u64 timestamp, u32 device_timestamp, 1365 struct ieee802_11_elems *elems, 1366 bool beacon) 1367 { 1368 struct ieee80211_local *local = sdata->local; 1369 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1370 struct cfg80211_bss *cbss = ifmgd->associated; 1371 struct ieee80211_chanctx_conf *conf; 1372 struct ieee80211_chanctx *chanctx; 1373 enum nl80211_band current_band; 1374 struct ieee80211_csa_ie csa_ie; 1375 struct ieee80211_channel_switch ch_switch; 1376 struct ieee80211_bss *bss; 1377 int res; 1378 1379 sdata_assert_lock(sdata); 1380 1381 if (!cbss) 1382 return; 1383 1384 if (local->scanning) 1385 return; 1386 1387 current_band = cbss->channel->band; 1388 bss = (void *)cbss->priv; 1389 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1390 bss->vht_cap_info, 1391 ifmgd->flags, 1392 ifmgd->associated->bssid, &csa_ie); 1393 1394 if (!res) { 1395 ch_switch.timestamp = timestamp; 1396 ch_switch.device_timestamp = device_timestamp; 1397 ch_switch.block_tx = csa_ie.mode; 1398 ch_switch.chandef = csa_ie.chandef; 1399 ch_switch.count = csa_ie.count; 1400 ch_switch.delay = csa_ie.max_switch_time; 1401 } 1402 1403 if (res < 0) { 1404 ieee80211_queue_work(&local->hw, 1405 &ifmgd->csa_connection_drop_work); 1406 return; 1407 } 1408 1409 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1410 if (res) 1411 ieee80211_sta_abort_chanswitch(sdata); 1412 else 1413 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1414 return; 1415 } else if (sdata->vif.csa_active || res) { 1416 /* disregard subsequent announcements if already processing */ 1417 return; 1418 } 1419 1420 if (sdata->vif.bss_conf.chandef.chan->band != 1421 csa_ie.chandef.chan->band) { 1422 sdata_info(sdata, 1423 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1424 ifmgd->associated->bssid, 1425 csa_ie.chandef.chan->center_freq, 1426 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1427 csa_ie.chandef.center_freq2); 1428 goto lock_and_drop_connection; 1429 } 1430 1431 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1432 IEEE80211_CHAN_DISABLED)) { 1433 sdata_info(sdata, 1434 "AP %pM switches to unsupported channel " 1435 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1436 "disconnecting\n", 1437 ifmgd->associated->bssid, 1438 csa_ie.chandef.chan->center_freq, 1439 csa_ie.chandef.chan->freq_offset, 1440 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1441 csa_ie.chandef.freq1_offset, 1442 csa_ie.chandef.center_freq2); 1443 goto lock_and_drop_connection; 1444 } 1445 1446 if (cfg80211_chandef_identical(&csa_ie.chandef, 1447 &sdata->vif.bss_conf.chandef) && 1448 (!csa_ie.mode || !beacon)) { 1449 if (ifmgd->csa_ignored_same_chan) 1450 return; 1451 sdata_info(sdata, 1452 "AP %pM tries to chanswitch to same channel, ignore\n", 1453 ifmgd->associated->bssid); 1454 ifmgd->csa_ignored_same_chan = true; 1455 return; 1456 } 1457 1458 /* 1459 * Drop all TDLS peers - either we disconnect or move to a different 1460 * channel from this point on. There's no telling what our peer will do. 1461 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1462 * have an incompatible wider chandef. 1463 */ 1464 ieee80211_teardown_tdls_peers(sdata); 1465 1466 mutex_lock(&local->mtx); 1467 mutex_lock(&local->chanctx_mtx); 1468 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1469 lockdep_is_held(&local->chanctx_mtx)); 1470 if (!conf) { 1471 sdata_info(sdata, 1472 "no channel context assigned to vif?, disconnecting\n"); 1473 goto drop_connection; 1474 } 1475 1476 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1477 1478 if (local->use_chanctx && 1479 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1480 sdata_info(sdata, 1481 "driver doesn't support chan-switch with channel contexts\n"); 1482 goto drop_connection; 1483 } 1484 1485 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1486 sdata_info(sdata, 1487 "preparing for channel switch failed, disconnecting\n"); 1488 goto drop_connection; 1489 } 1490 1491 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1492 chanctx->mode, false); 1493 if (res) { 1494 sdata_info(sdata, 1495 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1496 res); 1497 goto drop_connection; 1498 } 1499 mutex_unlock(&local->chanctx_mtx); 1500 1501 sdata->vif.csa_active = true; 1502 sdata->csa_chandef = csa_ie.chandef; 1503 sdata->csa_block_tx = csa_ie.mode; 1504 ifmgd->csa_ignored_same_chan = false; 1505 ifmgd->beacon_crc_valid = false; 1506 1507 if (sdata->csa_block_tx) 1508 ieee80211_stop_vif_queues(local, sdata, 1509 IEEE80211_QUEUE_STOP_REASON_CSA); 1510 mutex_unlock(&local->mtx); 1511 1512 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1513 csa_ie.count, csa_ie.mode); 1514 1515 if (local->ops->channel_switch) { 1516 /* use driver's channel switch callback */ 1517 drv_channel_switch(local, sdata, &ch_switch); 1518 return; 1519 } 1520 1521 /* channel switch handled in software */ 1522 if (csa_ie.count <= 1) 1523 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1524 else 1525 mod_timer(&ifmgd->chswitch_timer, 1526 TU_TO_EXP_TIME((csa_ie.count - 1) * 1527 cbss->beacon_interval)); 1528 return; 1529 lock_and_drop_connection: 1530 mutex_lock(&local->mtx); 1531 mutex_lock(&local->chanctx_mtx); 1532 drop_connection: 1533 /* 1534 * This is just so that the disconnect flow will know that 1535 * we were trying to switch channel and failed. In case the 1536 * mode is 1 (we are not allowed to Tx), we will know not to 1537 * send a deauthentication frame. Those two fields will be 1538 * reset when the disconnection worker runs. 1539 */ 1540 sdata->vif.csa_active = true; 1541 sdata->csa_block_tx = csa_ie.mode; 1542 1543 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1544 mutex_unlock(&local->chanctx_mtx); 1545 mutex_unlock(&local->mtx); 1546 } 1547 1548 static bool 1549 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1550 struct ieee80211_channel *channel, 1551 const u8 *country_ie, u8 country_ie_len, 1552 const u8 *pwr_constr_elem, 1553 int *chan_pwr, int *pwr_reduction) 1554 { 1555 struct ieee80211_country_ie_triplet *triplet; 1556 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1557 int i, chan_increment; 1558 bool have_chan_pwr = false; 1559 1560 /* Invalid IE */ 1561 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1562 return false; 1563 1564 triplet = (void *)(country_ie + 3); 1565 country_ie_len -= 3; 1566 1567 switch (channel->band) { 1568 default: 1569 WARN_ON_ONCE(1); 1570 fallthrough; 1571 case NL80211_BAND_2GHZ: 1572 case NL80211_BAND_60GHZ: 1573 chan_increment = 1; 1574 break; 1575 case NL80211_BAND_5GHZ: 1576 chan_increment = 4; 1577 break; 1578 case NL80211_BAND_6GHZ: 1579 /* 1580 * In the 6 GHz band, the "maximum transmit power level" 1581 * field in the triplets is reserved, and thus will be 1582 * zero and we shouldn't use it to control TX power. 1583 * The actual TX power will be given in the transmit 1584 * power envelope element instead. 1585 */ 1586 return false; 1587 } 1588 1589 /* find channel */ 1590 while (country_ie_len >= 3) { 1591 u8 first_channel = triplet->chans.first_channel; 1592 1593 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1594 goto next; 1595 1596 for (i = 0; i < triplet->chans.num_channels; i++) { 1597 if (first_channel + i * chan_increment == chan) { 1598 have_chan_pwr = true; 1599 *chan_pwr = triplet->chans.max_power; 1600 break; 1601 } 1602 } 1603 if (have_chan_pwr) 1604 break; 1605 1606 next: 1607 triplet++; 1608 country_ie_len -= 3; 1609 } 1610 1611 if (have_chan_pwr && pwr_constr_elem) 1612 *pwr_reduction = *pwr_constr_elem; 1613 else 1614 *pwr_reduction = 0; 1615 1616 return have_chan_pwr; 1617 } 1618 1619 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1620 struct ieee80211_channel *channel, 1621 const u8 *cisco_dtpc_ie, 1622 int *pwr_level) 1623 { 1624 /* From practical testing, the first data byte of the DTPC element 1625 * seems to contain the requested dBm level, and the CLI on Cisco 1626 * APs clearly state the range is -127 to 127 dBm, which indicates 1627 * a signed byte, although it seemingly never actually goes negative. 1628 * The other byte seems to always be zero. 1629 */ 1630 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1631 } 1632 1633 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1634 struct ieee80211_channel *channel, 1635 struct ieee80211_mgmt *mgmt, 1636 const u8 *country_ie, u8 country_ie_len, 1637 const u8 *pwr_constr_ie, 1638 const u8 *cisco_dtpc_ie) 1639 { 1640 bool has_80211h_pwr = false, has_cisco_pwr = false; 1641 int chan_pwr = 0, pwr_reduction_80211h = 0; 1642 int pwr_level_cisco, pwr_level_80211h; 1643 int new_ap_level; 1644 __le16 capab = mgmt->u.probe_resp.capab_info; 1645 1646 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1647 return 0; /* TODO */ 1648 1649 if (country_ie && 1650 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1651 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1652 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1653 sdata, channel, country_ie, country_ie_len, 1654 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1655 pwr_level_80211h = 1656 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1657 } 1658 1659 if (cisco_dtpc_ie) { 1660 ieee80211_find_cisco_dtpc( 1661 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1662 has_cisco_pwr = true; 1663 } 1664 1665 if (!has_80211h_pwr && !has_cisco_pwr) 1666 return 0; 1667 1668 /* If we have both 802.11h and Cisco DTPC, apply both limits 1669 * by picking the smallest of the two power levels advertised. 1670 */ 1671 if (has_80211h_pwr && 1672 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1673 new_ap_level = pwr_level_80211h; 1674 1675 if (sdata->ap_power_level == new_ap_level) 1676 return 0; 1677 1678 sdata_dbg(sdata, 1679 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1680 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1681 sdata->u.mgd.bssid); 1682 } else { /* has_cisco_pwr is always true here. */ 1683 new_ap_level = pwr_level_cisco; 1684 1685 if (sdata->ap_power_level == new_ap_level) 1686 return 0; 1687 1688 sdata_dbg(sdata, 1689 "Limiting TX power to %d dBm as advertised by %pM\n", 1690 pwr_level_cisco, sdata->u.mgd.bssid); 1691 } 1692 1693 sdata->ap_power_level = new_ap_level; 1694 if (__ieee80211_recalc_txpower(sdata)) 1695 return BSS_CHANGED_TXPOWER; 1696 return 0; 1697 } 1698 1699 /* powersave */ 1700 static void ieee80211_enable_ps(struct ieee80211_local *local, 1701 struct ieee80211_sub_if_data *sdata) 1702 { 1703 struct ieee80211_conf *conf = &local->hw.conf; 1704 1705 /* 1706 * If we are scanning right now then the parameters will 1707 * take effect when scan finishes. 1708 */ 1709 if (local->scanning) 1710 return; 1711 1712 if (conf->dynamic_ps_timeout > 0 && 1713 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1714 mod_timer(&local->dynamic_ps_timer, jiffies + 1715 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1716 } else { 1717 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1718 ieee80211_send_nullfunc(local, sdata, true); 1719 1720 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1721 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1722 return; 1723 1724 conf->flags |= IEEE80211_CONF_PS; 1725 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1726 } 1727 } 1728 1729 static void ieee80211_change_ps(struct ieee80211_local *local) 1730 { 1731 struct ieee80211_conf *conf = &local->hw.conf; 1732 1733 if (local->ps_sdata) { 1734 ieee80211_enable_ps(local, local->ps_sdata); 1735 } else if (conf->flags & IEEE80211_CONF_PS) { 1736 conf->flags &= ~IEEE80211_CONF_PS; 1737 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1738 del_timer_sync(&local->dynamic_ps_timer); 1739 cancel_work_sync(&local->dynamic_ps_enable_work); 1740 } 1741 } 1742 1743 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1744 { 1745 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1746 struct sta_info *sta = NULL; 1747 bool authorized = false; 1748 1749 if (!mgd->powersave) 1750 return false; 1751 1752 if (mgd->broken_ap) 1753 return false; 1754 1755 if (!mgd->associated) 1756 return false; 1757 1758 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1759 return false; 1760 1761 if (!mgd->have_beacon) 1762 return false; 1763 1764 rcu_read_lock(); 1765 sta = sta_info_get(sdata, mgd->bssid); 1766 if (sta) 1767 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1768 rcu_read_unlock(); 1769 1770 return authorized; 1771 } 1772 1773 /* need to hold RTNL or interface lock */ 1774 void ieee80211_recalc_ps(struct ieee80211_local *local) 1775 { 1776 struct ieee80211_sub_if_data *sdata, *found = NULL; 1777 int count = 0; 1778 int timeout; 1779 1780 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1781 local->ps_sdata = NULL; 1782 return; 1783 } 1784 1785 list_for_each_entry(sdata, &local->interfaces, list) { 1786 if (!ieee80211_sdata_running(sdata)) 1787 continue; 1788 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1789 /* If an AP vif is found, then disable PS 1790 * by setting the count to zero thereby setting 1791 * ps_sdata to NULL. 1792 */ 1793 count = 0; 1794 break; 1795 } 1796 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1797 continue; 1798 found = sdata; 1799 count++; 1800 } 1801 1802 if (count == 1 && ieee80211_powersave_allowed(found)) { 1803 u8 dtimper = found->u.mgd.dtim_period; 1804 1805 timeout = local->dynamic_ps_forced_timeout; 1806 if (timeout < 0) 1807 timeout = 100; 1808 local->hw.conf.dynamic_ps_timeout = timeout; 1809 1810 /* If the TIM IE is invalid, pretend the value is 1 */ 1811 if (!dtimper) 1812 dtimper = 1; 1813 1814 local->hw.conf.ps_dtim_period = dtimper; 1815 local->ps_sdata = found; 1816 } else { 1817 local->ps_sdata = NULL; 1818 } 1819 1820 ieee80211_change_ps(local); 1821 } 1822 1823 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1824 { 1825 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1826 1827 if (sdata->vif.bss_conf.ps != ps_allowed) { 1828 sdata->vif.bss_conf.ps = ps_allowed; 1829 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1830 } 1831 } 1832 1833 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1834 { 1835 struct ieee80211_local *local = 1836 container_of(work, struct ieee80211_local, 1837 dynamic_ps_disable_work); 1838 1839 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1840 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1841 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1842 } 1843 1844 ieee80211_wake_queues_by_reason(&local->hw, 1845 IEEE80211_MAX_QUEUE_MAP, 1846 IEEE80211_QUEUE_STOP_REASON_PS, 1847 false); 1848 } 1849 1850 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1851 { 1852 struct ieee80211_local *local = 1853 container_of(work, struct ieee80211_local, 1854 dynamic_ps_enable_work); 1855 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1856 struct ieee80211_if_managed *ifmgd; 1857 unsigned long flags; 1858 int q; 1859 1860 /* can only happen when PS was just disabled anyway */ 1861 if (!sdata) 1862 return; 1863 1864 ifmgd = &sdata->u.mgd; 1865 1866 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1867 return; 1868 1869 if (local->hw.conf.dynamic_ps_timeout > 0) { 1870 /* don't enter PS if TX frames are pending */ 1871 if (drv_tx_frames_pending(local)) { 1872 mod_timer(&local->dynamic_ps_timer, jiffies + 1873 msecs_to_jiffies( 1874 local->hw.conf.dynamic_ps_timeout)); 1875 return; 1876 } 1877 1878 /* 1879 * transmission can be stopped by others which leads to 1880 * dynamic_ps_timer expiry. Postpone the ps timer if it 1881 * is not the actual idle state. 1882 */ 1883 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1884 for (q = 0; q < local->hw.queues; q++) { 1885 if (local->queue_stop_reasons[q]) { 1886 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1887 flags); 1888 mod_timer(&local->dynamic_ps_timer, jiffies + 1889 msecs_to_jiffies( 1890 local->hw.conf.dynamic_ps_timeout)); 1891 return; 1892 } 1893 } 1894 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1895 } 1896 1897 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1898 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1899 if (drv_tx_frames_pending(local)) { 1900 mod_timer(&local->dynamic_ps_timer, jiffies + 1901 msecs_to_jiffies( 1902 local->hw.conf.dynamic_ps_timeout)); 1903 } else { 1904 ieee80211_send_nullfunc(local, sdata, true); 1905 /* Flush to get the tx status of nullfunc frame */ 1906 ieee80211_flush_queues(local, sdata, false); 1907 } 1908 } 1909 1910 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1911 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1912 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1913 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1914 local->hw.conf.flags |= IEEE80211_CONF_PS; 1915 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1916 } 1917 } 1918 1919 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1920 { 1921 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1922 1923 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1924 } 1925 1926 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1927 { 1928 struct delayed_work *delayed_work = to_delayed_work(work); 1929 struct ieee80211_sub_if_data *sdata = 1930 container_of(delayed_work, struct ieee80211_sub_if_data, 1931 dfs_cac_timer_work); 1932 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1933 1934 mutex_lock(&sdata->local->mtx); 1935 if (sdata->wdev.cac_started) { 1936 ieee80211_vif_release_channel(sdata); 1937 cfg80211_cac_event(sdata->dev, &chandef, 1938 NL80211_RADAR_CAC_FINISHED, 1939 GFP_KERNEL); 1940 } 1941 mutex_unlock(&sdata->local->mtx); 1942 } 1943 1944 static bool 1945 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1946 { 1947 struct ieee80211_local *local = sdata->local; 1948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1949 bool ret = false; 1950 int ac; 1951 1952 if (local->hw.queues < IEEE80211_NUM_ACS) 1953 return false; 1954 1955 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1956 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1957 int non_acm_ac; 1958 unsigned long now = jiffies; 1959 1960 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1961 tx_tspec->admitted_time && 1962 time_after(now, tx_tspec->time_slice_start + HZ)) { 1963 tx_tspec->consumed_tx_time = 0; 1964 tx_tspec->time_slice_start = now; 1965 1966 if (tx_tspec->downgraded) 1967 tx_tspec->action = 1968 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1969 } 1970 1971 switch (tx_tspec->action) { 1972 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1973 /* take the original parameters */ 1974 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1975 sdata_err(sdata, 1976 "failed to set TX queue parameters for queue %d\n", 1977 ac); 1978 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1979 tx_tspec->downgraded = false; 1980 ret = true; 1981 break; 1982 case TX_TSPEC_ACTION_DOWNGRADE: 1983 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1984 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1985 ret = true; 1986 break; 1987 } 1988 /* downgrade next lower non-ACM AC */ 1989 for (non_acm_ac = ac + 1; 1990 non_acm_ac < IEEE80211_NUM_ACS; 1991 non_acm_ac++) 1992 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1993 break; 1994 /* Usually the loop will result in using BK even if it 1995 * requires admission control, but such a configuration 1996 * makes no sense and we have to transmit somehow - the 1997 * AC selection does the same thing. 1998 * If we started out trying to downgrade from BK, then 1999 * the extra condition here might be needed. 2000 */ 2001 if (non_acm_ac >= IEEE80211_NUM_ACS) 2002 non_acm_ac = IEEE80211_AC_BK; 2003 if (drv_conf_tx(local, sdata, ac, 2004 &sdata->tx_conf[non_acm_ac])) 2005 sdata_err(sdata, 2006 "failed to set TX queue parameters for queue %d\n", 2007 ac); 2008 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2009 ret = true; 2010 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2011 tx_tspec->time_slice_start + HZ - now + 1); 2012 break; 2013 case TX_TSPEC_ACTION_NONE: 2014 /* nothing now */ 2015 break; 2016 } 2017 } 2018 2019 return ret; 2020 } 2021 2022 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2023 { 2024 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2025 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 2026 } 2027 2028 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2029 { 2030 struct ieee80211_sub_if_data *sdata; 2031 2032 sdata = container_of(work, struct ieee80211_sub_if_data, 2033 u.mgd.tx_tspec_wk.work); 2034 ieee80211_sta_handle_tspec_ac_params(sdata); 2035 } 2036 2037 /* MLME */ 2038 static bool 2039 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2040 struct ieee80211_sub_if_data *sdata, 2041 const u8 *wmm_param, size_t wmm_param_len, 2042 const struct ieee80211_mu_edca_param_set *mu_edca) 2043 { 2044 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2045 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2046 size_t left; 2047 int count, mu_edca_count, ac; 2048 const u8 *pos; 2049 u8 uapsd_queues = 0; 2050 2051 if (!local->ops->conf_tx) 2052 return false; 2053 2054 if (local->hw.queues < IEEE80211_NUM_ACS) 2055 return false; 2056 2057 if (!wmm_param) 2058 return false; 2059 2060 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2061 return false; 2062 2063 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2064 uapsd_queues = ifmgd->uapsd_queues; 2065 2066 count = wmm_param[6] & 0x0f; 2067 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2068 * if mu_edca was preset before and now it disappeared tell 2069 * the driver about it. 2070 */ 2071 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2072 if (count == ifmgd->wmm_last_param_set && 2073 mu_edca_count == ifmgd->mu_edca_last_param_set) 2074 return false; 2075 ifmgd->wmm_last_param_set = count; 2076 ifmgd->mu_edca_last_param_set = mu_edca_count; 2077 2078 pos = wmm_param + 8; 2079 left = wmm_param_len - 8; 2080 2081 memset(¶ms, 0, sizeof(params)); 2082 2083 sdata->wmm_acm = 0; 2084 for (; left >= 4; left -= 4, pos += 4) { 2085 int aci = (pos[0] >> 5) & 0x03; 2086 int acm = (pos[0] >> 4) & 0x01; 2087 bool uapsd = false; 2088 2089 switch (aci) { 2090 case 1: /* AC_BK */ 2091 ac = IEEE80211_AC_BK; 2092 if (acm) 2093 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2094 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2095 uapsd = true; 2096 params[ac].mu_edca = !!mu_edca; 2097 if (mu_edca) 2098 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2099 break; 2100 case 2: /* AC_VI */ 2101 ac = IEEE80211_AC_VI; 2102 if (acm) 2103 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2104 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2105 uapsd = true; 2106 params[ac].mu_edca = !!mu_edca; 2107 if (mu_edca) 2108 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2109 break; 2110 case 3: /* AC_VO */ 2111 ac = IEEE80211_AC_VO; 2112 if (acm) 2113 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2114 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2115 uapsd = true; 2116 params[ac].mu_edca = !!mu_edca; 2117 if (mu_edca) 2118 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2119 break; 2120 case 0: /* AC_BE */ 2121 default: 2122 ac = IEEE80211_AC_BE; 2123 if (acm) 2124 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2125 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2126 uapsd = true; 2127 params[ac].mu_edca = !!mu_edca; 2128 if (mu_edca) 2129 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2130 break; 2131 } 2132 2133 params[ac].aifs = pos[0] & 0x0f; 2134 2135 if (params[ac].aifs < 2) { 2136 sdata_info(sdata, 2137 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2138 params[ac].aifs, aci); 2139 params[ac].aifs = 2; 2140 } 2141 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2142 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2143 params[ac].txop = get_unaligned_le16(pos + 2); 2144 params[ac].acm = acm; 2145 params[ac].uapsd = uapsd; 2146 2147 if (params[ac].cw_min == 0 || 2148 params[ac].cw_min > params[ac].cw_max) { 2149 sdata_info(sdata, 2150 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2151 params[ac].cw_min, params[ac].cw_max, aci); 2152 return false; 2153 } 2154 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2155 } 2156 2157 /* WMM specification requires all 4 ACIs. */ 2158 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2159 if (params[ac].cw_min == 0) { 2160 sdata_info(sdata, 2161 "AP has invalid WMM params (missing AC %d), using defaults\n", 2162 ac); 2163 return false; 2164 } 2165 } 2166 2167 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2168 mlme_dbg(sdata, 2169 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2170 ac, params[ac].acm, 2171 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2172 params[ac].txop, params[ac].uapsd, 2173 ifmgd->tx_tspec[ac].downgraded); 2174 sdata->tx_conf[ac] = params[ac]; 2175 if (!ifmgd->tx_tspec[ac].downgraded && 2176 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2177 sdata_err(sdata, 2178 "failed to set TX queue parameters for AC %d\n", 2179 ac); 2180 } 2181 2182 /* enable WMM or activate new settings */ 2183 sdata->vif.bss_conf.qos = true; 2184 return true; 2185 } 2186 2187 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2188 { 2189 lockdep_assert_held(&sdata->local->mtx); 2190 2191 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2192 ieee80211_run_deferred_scan(sdata->local); 2193 } 2194 2195 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2196 { 2197 mutex_lock(&sdata->local->mtx); 2198 __ieee80211_stop_poll(sdata); 2199 mutex_unlock(&sdata->local->mtx); 2200 } 2201 2202 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2203 u16 capab, bool erp_valid, u8 erp) 2204 { 2205 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2206 struct ieee80211_supported_band *sband; 2207 u32 changed = 0; 2208 bool use_protection; 2209 bool use_short_preamble; 2210 bool use_short_slot; 2211 2212 sband = ieee80211_get_sband(sdata); 2213 if (!sband) 2214 return changed; 2215 2216 if (erp_valid) { 2217 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2218 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2219 } else { 2220 use_protection = false; 2221 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2222 } 2223 2224 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2225 if (sband->band == NL80211_BAND_5GHZ || 2226 sband->band == NL80211_BAND_6GHZ) 2227 use_short_slot = true; 2228 2229 if (use_protection != bss_conf->use_cts_prot) { 2230 bss_conf->use_cts_prot = use_protection; 2231 changed |= BSS_CHANGED_ERP_CTS_PROT; 2232 } 2233 2234 if (use_short_preamble != bss_conf->use_short_preamble) { 2235 bss_conf->use_short_preamble = use_short_preamble; 2236 changed |= BSS_CHANGED_ERP_PREAMBLE; 2237 } 2238 2239 if (use_short_slot != bss_conf->use_short_slot) { 2240 bss_conf->use_short_slot = use_short_slot; 2241 changed |= BSS_CHANGED_ERP_SLOT; 2242 } 2243 2244 return changed; 2245 } 2246 2247 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2248 struct cfg80211_bss *cbss, 2249 u32 bss_info_changed) 2250 { 2251 struct ieee80211_bss *bss = (void *)cbss->priv; 2252 struct ieee80211_local *local = sdata->local; 2253 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2254 2255 bss_info_changed |= BSS_CHANGED_ASSOC; 2256 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2257 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2258 2259 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2260 beacon_loss_count * bss_conf->beacon_int)); 2261 2262 sdata->u.mgd.associated = cbss; 2263 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2264 2265 ieee80211_check_rate_mask(sdata); 2266 2267 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2268 2269 if (sdata->vif.p2p || 2270 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2271 const struct cfg80211_bss_ies *ies; 2272 2273 rcu_read_lock(); 2274 ies = rcu_dereference(cbss->ies); 2275 if (ies) { 2276 int ret; 2277 2278 ret = cfg80211_get_p2p_attr( 2279 ies->data, ies->len, 2280 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2281 (u8 *) &bss_conf->p2p_noa_attr, 2282 sizeof(bss_conf->p2p_noa_attr)); 2283 if (ret >= 2) { 2284 sdata->u.mgd.p2p_noa_index = 2285 bss_conf->p2p_noa_attr.index; 2286 bss_info_changed |= BSS_CHANGED_P2P_PS; 2287 } 2288 } 2289 rcu_read_unlock(); 2290 } 2291 2292 /* just to be sure */ 2293 ieee80211_stop_poll(sdata); 2294 2295 ieee80211_led_assoc(local, 1); 2296 2297 if (sdata->u.mgd.have_beacon) { 2298 /* 2299 * If the AP is buggy we may get here with no DTIM period 2300 * known, so assume it's 1 which is the only safe assumption 2301 * in that case, although if the TIM IE is broken powersave 2302 * probably just won't work at all. 2303 */ 2304 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2305 bss_conf->beacon_rate = bss->beacon_rate; 2306 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2307 } else { 2308 bss_conf->beacon_rate = NULL; 2309 bss_conf->dtim_period = 0; 2310 } 2311 2312 bss_conf->assoc = 1; 2313 2314 /* Tell the driver to monitor connection quality (if supported) */ 2315 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2316 bss_conf->cqm_rssi_thold) 2317 bss_info_changed |= BSS_CHANGED_CQM; 2318 2319 /* Enable ARP filtering */ 2320 if (bss_conf->arp_addr_cnt) 2321 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2322 2323 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2324 2325 mutex_lock(&local->iflist_mtx); 2326 ieee80211_recalc_ps(local); 2327 mutex_unlock(&local->iflist_mtx); 2328 2329 ieee80211_recalc_smps(sdata); 2330 ieee80211_recalc_ps_vif(sdata); 2331 2332 netif_carrier_on(sdata->dev); 2333 } 2334 2335 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2336 u16 stype, u16 reason, bool tx, 2337 u8 *frame_buf) 2338 { 2339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2340 struct ieee80211_local *local = sdata->local; 2341 u32 changed = 0; 2342 2343 sdata_assert_lock(sdata); 2344 2345 if (WARN_ON_ONCE(tx && !frame_buf)) 2346 return; 2347 2348 if (WARN_ON(!ifmgd->associated)) 2349 return; 2350 2351 ieee80211_stop_poll(sdata); 2352 2353 ifmgd->associated = NULL; 2354 netif_carrier_off(sdata->dev); 2355 2356 /* 2357 * if we want to get out of ps before disassoc (why?) we have 2358 * to do it before sending disassoc, as otherwise the null-packet 2359 * won't be valid. 2360 */ 2361 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2362 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2363 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2364 } 2365 local->ps_sdata = NULL; 2366 2367 /* disable per-vif ps */ 2368 ieee80211_recalc_ps_vif(sdata); 2369 2370 /* make sure ongoing transmission finishes */ 2371 synchronize_net(); 2372 2373 /* 2374 * drop any frame before deauth/disassoc, this can be data or 2375 * management frame. Since we are disconnecting, we should not 2376 * insist sending these frames which can take time and delay 2377 * the disconnection and possible the roaming. 2378 */ 2379 if (tx) 2380 ieee80211_flush_queues(local, sdata, true); 2381 2382 /* deauthenticate/disassociate now */ 2383 if (tx || frame_buf) { 2384 /* 2385 * In multi channel scenarios guarantee that the virtual 2386 * interface is granted immediate airtime to transmit the 2387 * deauthentication frame by calling mgd_prepare_tx, if the 2388 * driver requested so. 2389 */ 2390 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2391 !ifmgd->have_beacon) 2392 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2393 2394 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2395 ifmgd->bssid, stype, reason, 2396 tx, frame_buf); 2397 } 2398 2399 /* flush out frame - make sure the deauth was actually sent */ 2400 if (tx) 2401 ieee80211_flush_queues(local, sdata, false); 2402 2403 /* clear bssid only after building the needed mgmt frames */ 2404 eth_zero_addr(ifmgd->bssid); 2405 2406 sdata->vif.bss_conf.ssid_len = 0; 2407 2408 /* remove AP and TDLS peers */ 2409 sta_info_flush(sdata); 2410 2411 /* finally reset all BSS / config parameters */ 2412 changed |= ieee80211_reset_erp_info(sdata); 2413 2414 ieee80211_led_assoc(local, 0); 2415 changed |= BSS_CHANGED_ASSOC; 2416 sdata->vif.bss_conf.assoc = false; 2417 2418 ifmgd->p2p_noa_index = -1; 2419 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2420 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2421 2422 /* on the next assoc, re-program HT/VHT parameters */ 2423 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2424 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2425 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2426 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2427 2428 /* reset MU-MIMO ownership and group data */ 2429 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2430 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2431 memset(sdata->vif.bss_conf.mu_group.position, 0, 2432 sizeof(sdata->vif.bss_conf.mu_group.position)); 2433 changed |= BSS_CHANGED_MU_GROUPS; 2434 sdata->vif.mu_mimo_owner = false; 2435 2436 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2437 2438 del_timer_sync(&local->dynamic_ps_timer); 2439 cancel_work_sync(&local->dynamic_ps_enable_work); 2440 2441 /* Disable ARP filtering */ 2442 if (sdata->vif.bss_conf.arp_addr_cnt) 2443 changed |= BSS_CHANGED_ARP_FILTER; 2444 2445 sdata->vif.bss_conf.qos = false; 2446 changed |= BSS_CHANGED_QOS; 2447 2448 /* The BSSID (not really interesting) and HT changed */ 2449 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2450 ieee80211_bss_info_change_notify(sdata, changed); 2451 2452 /* disassociated - set to defaults now */ 2453 ieee80211_set_wmm_default(sdata, false, false); 2454 2455 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2456 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2457 del_timer_sync(&sdata->u.mgd.timer); 2458 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2459 2460 sdata->vif.bss_conf.dtim_period = 0; 2461 sdata->vif.bss_conf.beacon_rate = NULL; 2462 2463 ifmgd->have_beacon = false; 2464 2465 ifmgd->flags = 0; 2466 mutex_lock(&local->mtx); 2467 ieee80211_vif_release_channel(sdata); 2468 2469 sdata->vif.csa_active = false; 2470 ifmgd->csa_waiting_bcn = false; 2471 ifmgd->csa_ignored_same_chan = false; 2472 if (sdata->csa_block_tx) { 2473 ieee80211_wake_vif_queues(local, sdata, 2474 IEEE80211_QUEUE_STOP_REASON_CSA); 2475 sdata->csa_block_tx = false; 2476 } 2477 mutex_unlock(&local->mtx); 2478 2479 /* existing TX TSPEC sessions no longer exist */ 2480 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2481 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2482 2483 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2484 } 2485 2486 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2487 { 2488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2489 struct ieee80211_local *local = sdata->local; 2490 2491 mutex_lock(&local->mtx); 2492 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2493 goto out; 2494 2495 __ieee80211_stop_poll(sdata); 2496 2497 mutex_lock(&local->iflist_mtx); 2498 ieee80211_recalc_ps(local); 2499 mutex_unlock(&local->iflist_mtx); 2500 2501 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2502 goto out; 2503 2504 /* 2505 * We've received a probe response, but are not sure whether 2506 * we have or will be receiving any beacons or data, so let's 2507 * schedule the timers again, just in case. 2508 */ 2509 ieee80211_sta_reset_beacon_monitor(sdata); 2510 2511 mod_timer(&ifmgd->conn_mon_timer, 2512 round_jiffies_up(jiffies + 2513 IEEE80211_CONNECTION_IDLE_TIME)); 2514 out: 2515 mutex_unlock(&local->mtx); 2516 } 2517 2518 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2519 struct ieee80211_hdr *hdr, 2520 u16 tx_time) 2521 { 2522 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2523 u16 tid = ieee80211_get_tid(hdr); 2524 int ac = ieee80211_ac_from_tid(tid); 2525 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2526 unsigned long now = jiffies; 2527 2528 if (likely(!tx_tspec->admitted_time)) 2529 return; 2530 2531 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2532 tx_tspec->consumed_tx_time = 0; 2533 tx_tspec->time_slice_start = now; 2534 2535 if (tx_tspec->downgraded) { 2536 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2537 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2538 } 2539 } 2540 2541 if (tx_tspec->downgraded) 2542 return; 2543 2544 tx_tspec->consumed_tx_time += tx_time; 2545 2546 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2547 tx_tspec->downgraded = true; 2548 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2549 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2550 } 2551 } 2552 2553 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2554 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2555 { 2556 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2557 2558 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2559 !sdata->u.mgd.probe_send_count) 2560 return; 2561 2562 if (ack) 2563 sdata->u.mgd.probe_send_count = 0; 2564 else 2565 sdata->u.mgd.nullfunc_failed = true; 2566 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2567 } 2568 2569 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2570 const u8 *src, const u8 *dst, 2571 const u8 *ssid, size_t ssid_len, 2572 struct ieee80211_channel *channel) 2573 { 2574 struct sk_buff *skb; 2575 2576 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2577 ssid, ssid_len, NULL, 0, 2578 IEEE80211_PROBE_FLAG_DIRECTED); 2579 if (skb) 2580 ieee80211_tx_skb(sdata, skb); 2581 } 2582 2583 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2584 { 2585 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2586 const u8 *ssid; 2587 u8 *dst = ifmgd->associated->bssid; 2588 u8 unicast_limit = max(1, max_probe_tries - 3); 2589 struct sta_info *sta; 2590 2591 /* 2592 * Try sending broadcast probe requests for the last three 2593 * probe requests after the first ones failed since some 2594 * buggy APs only support broadcast probe requests. 2595 */ 2596 if (ifmgd->probe_send_count >= unicast_limit) 2597 dst = NULL; 2598 2599 /* 2600 * When the hardware reports an accurate Tx ACK status, it's 2601 * better to send a nullfunc frame instead of a probe request, 2602 * as it will kick us off the AP quickly if we aren't associated 2603 * anymore. The timeout will be reset if the frame is ACKed by 2604 * the AP. 2605 */ 2606 ifmgd->probe_send_count++; 2607 2608 if (dst) { 2609 mutex_lock(&sdata->local->sta_mtx); 2610 sta = sta_info_get(sdata, dst); 2611 if (!WARN_ON(!sta)) 2612 ieee80211_check_fast_rx(sta); 2613 mutex_unlock(&sdata->local->sta_mtx); 2614 } 2615 2616 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2617 ifmgd->nullfunc_failed = false; 2618 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2619 ifmgd->probe_send_count--; 2620 else 2621 ieee80211_send_nullfunc(sdata->local, sdata, false); 2622 } else { 2623 int ssid_len; 2624 2625 rcu_read_lock(); 2626 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2627 if (WARN_ON_ONCE(ssid == NULL)) 2628 ssid_len = 0; 2629 else 2630 ssid_len = ssid[1]; 2631 2632 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2633 ssid + 2, ssid_len, 2634 ifmgd->associated->channel); 2635 rcu_read_unlock(); 2636 } 2637 2638 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2639 run_again(sdata, ifmgd->probe_timeout); 2640 } 2641 2642 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2643 bool beacon) 2644 { 2645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2646 bool already = false; 2647 2648 if (!ieee80211_sdata_running(sdata)) 2649 return; 2650 2651 sdata_lock(sdata); 2652 2653 if (!ifmgd->associated) 2654 goto out; 2655 2656 mutex_lock(&sdata->local->mtx); 2657 2658 if (sdata->local->tmp_channel || sdata->local->scanning) { 2659 mutex_unlock(&sdata->local->mtx); 2660 goto out; 2661 } 2662 2663 if (beacon) { 2664 mlme_dbg_ratelimited(sdata, 2665 "detected beacon loss from AP (missed %d beacons) - probing\n", 2666 beacon_loss_count); 2667 2668 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2669 } 2670 2671 /* 2672 * The driver/our work has already reported this event or the 2673 * connection monitoring has kicked in and we have already sent 2674 * a probe request. Or maybe the AP died and the driver keeps 2675 * reporting until we disassociate... 2676 * 2677 * In either case we have to ignore the current call to this 2678 * function (except for setting the correct probe reason bit) 2679 * because otherwise we would reset the timer every time and 2680 * never check whether we received a probe response! 2681 */ 2682 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2683 already = true; 2684 2685 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2686 2687 mutex_unlock(&sdata->local->mtx); 2688 2689 if (already) 2690 goto out; 2691 2692 mutex_lock(&sdata->local->iflist_mtx); 2693 ieee80211_recalc_ps(sdata->local); 2694 mutex_unlock(&sdata->local->iflist_mtx); 2695 2696 ifmgd->probe_send_count = 0; 2697 ieee80211_mgd_probe_ap_send(sdata); 2698 out: 2699 sdata_unlock(sdata); 2700 } 2701 2702 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2703 struct ieee80211_vif *vif) 2704 { 2705 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2707 struct cfg80211_bss *cbss; 2708 struct sk_buff *skb; 2709 const u8 *ssid; 2710 int ssid_len; 2711 2712 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2713 return NULL; 2714 2715 sdata_assert_lock(sdata); 2716 2717 if (ifmgd->associated) 2718 cbss = ifmgd->associated; 2719 else if (ifmgd->auth_data) 2720 cbss = ifmgd->auth_data->bss; 2721 else if (ifmgd->assoc_data) 2722 cbss = ifmgd->assoc_data->bss; 2723 else 2724 return NULL; 2725 2726 rcu_read_lock(); 2727 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2728 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2729 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2730 ssid_len = 0; 2731 else 2732 ssid_len = ssid[1]; 2733 2734 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2735 (u32) -1, cbss->channel, 2736 ssid + 2, ssid_len, 2737 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2738 rcu_read_unlock(); 2739 2740 return skb; 2741 } 2742 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2743 2744 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2745 const u8 *buf, size_t len, bool tx, 2746 u16 reason, bool reconnect) 2747 { 2748 struct ieee80211_event event = { 2749 .type = MLME_EVENT, 2750 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2751 .u.mlme.reason = reason, 2752 }; 2753 2754 if (tx) 2755 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2756 else 2757 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2758 2759 drv_event_callback(sdata->local, sdata, &event); 2760 } 2761 2762 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2763 { 2764 struct ieee80211_local *local = sdata->local; 2765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2766 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2767 bool tx; 2768 2769 sdata_lock(sdata); 2770 if (!ifmgd->associated) { 2771 sdata_unlock(sdata); 2772 return; 2773 } 2774 2775 tx = !sdata->csa_block_tx; 2776 2777 if (!ifmgd->driver_disconnect) { 2778 /* 2779 * AP is probably out of range (or not reachable for another 2780 * reason) so remove the bss struct for that AP. 2781 */ 2782 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2783 } 2784 2785 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2786 ifmgd->driver_disconnect ? 2787 WLAN_REASON_DEAUTH_LEAVING : 2788 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2789 tx, frame_buf); 2790 mutex_lock(&local->mtx); 2791 sdata->vif.csa_active = false; 2792 ifmgd->csa_waiting_bcn = false; 2793 if (sdata->csa_block_tx) { 2794 ieee80211_wake_vif_queues(local, sdata, 2795 IEEE80211_QUEUE_STOP_REASON_CSA); 2796 sdata->csa_block_tx = false; 2797 } 2798 mutex_unlock(&local->mtx); 2799 2800 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2801 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2802 ifmgd->reconnect); 2803 ifmgd->reconnect = false; 2804 2805 sdata_unlock(sdata); 2806 } 2807 2808 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2809 { 2810 struct ieee80211_sub_if_data *sdata = 2811 container_of(work, struct ieee80211_sub_if_data, 2812 u.mgd.beacon_connection_loss_work); 2813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2814 2815 if (ifmgd->associated) 2816 ifmgd->beacon_loss_count++; 2817 2818 if (ifmgd->connection_loss) { 2819 sdata_info(sdata, "Connection to AP %pM lost\n", 2820 ifmgd->bssid); 2821 __ieee80211_disconnect(sdata); 2822 ifmgd->connection_loss = false; 2823 } else if (ifmgd->driver_disconnect) { 2824 sdata_info(sdata, 2825 "Driver requested disconnection from AP %pM\n", 2826 ifmgd->bssid); 2827 __ieee80211_disconnect(sdata); 2828 ifmgd->driver_disconnect = false; 2829 } else { 2830 ieee80211_mgd_probe_ap(sdata, true); 2831 } 2832 } 2833 2834 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2835 { 2836 struct ieee80211_sub_if_data *sdata = 2837 container_of(work, struct ieee80211_sub_if_data, 2838 u.mgd.csa_connection_drop_work); 2839 2840 __ieee80211_disconnect(sdata); 2841 } 2842 2843 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2844 { 2845 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2846 struct ieee80211_hw *hw = &sdata->local->hw; 2847 2848 trace_api_beacon_loss(sdata); 2849 2850 sdata->u.mgd.connection_loss = false; 2851 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2852 } 2853 EXPORT_SYMBOL(ieee80211_beacon_loss); 2854 2855 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2856 { 2857 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2858 struct ieee80211_hw *hw = &sdata->local->hw; 2859 2860 trace_api_connection_loss(sdata); 2861 2862 sdata->u.mgd.connection_loss = true; 2863 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2864 } 2865 EXPORT_SYMBOL(ieee80211_connection_loss); 2866 2867 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2868 { 2869 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2870 struct ieee80211_hw *hw = &sdata->local->hw; 2871 2872 trace_api_disconnect(sdata, reconnect); 2873 2874 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2875 return; 2876 2877 sdata->u.mgd.driver_disconnect = true; 2878 sdata->u.mgd.reconnect = reconnect; 2879 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2880 } 2881 EXPORT_SYMBOL(ieee80211_disconnect); 2882 2883 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2884 bool assoc) 2885 { 2886 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2887 2888 sdata_assert_lock(sdata); 2889 2890 if (!assoc) { 2891 /* 2892 * we are not authenticated yet, the only timer that could be 2893 * running is the timeout for the authentication response which 2894 * which is not relevant anymore. 2895 */ 2896 del_timer_sync(&sdata->u.mgd.timer); 2897 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2898 2899 eth_zero_addr(sdata->u.mgd.bssid); 2900 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2901 sdata->u.mgd.flags = 0; 2902 mutex_lock(&sdata->local->mtx); 2903 ieee80211_vif_release_channel(sdata); 2904 mutex_unlock(&sdata->local->mtx); 2905 } 2906 2907 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2908 kfree(auth_data); 2909 sdata->u.mgd.auth_data = NULL; 2910 } 2911 2912 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2913 bool assoc, bool abandon) 2914 { 2915 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2916 2917 sdata_assert_lock(sdata); 2918 2919 if (!assoc) { 2920 /* 2921 * we are not associated yet, the only timer that could be 2922 * running is the timeout for the association response which 2923 * which is not relevant anymore. 2924 */ 2925 del_timer_sync(&sdata->u.mgd.timer); 2926 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2927 2928 eth_zero_addr(sdata->u.mgd.bssid); 2929 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2930 sdata->u.mgd.flags = 0; 2931 sdata->vif.mu_mimo_owner = false; 2932 2933 mutex_lock(&sdata->local->mtx); 2934 ieee80211_vif_release_channel(sdata); 2935 mutex_unlock(&sdata->local->mtx); 2936 2937 if (abandon) 2938 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2939 } 2940 2941 kfree(assoc_data); 2942 sdata->u.mgd.assoc_data = NULL; 2943 } 2944 2945 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2946 struct ieee80211_mgmt *mgmt, size_t len) 2947 { 2948 struct ieee80211_local *local = sdata->local; 2949 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2950 u8 *pos; 2951 struct ieee802_11_elems elems; 2952 u32 tx_flags = 0; 2953 2954 pos = mgmt->u.auth.variable; 2955 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2956 mgmt->bssid, auth_data->bss->bssid); 2957 if (!elems.challenge) 2958 return; 2959 auth_data->expected_transaction = 4; 2960 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2961 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2962 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2963 IEEE80211_TX_INTFL_MLME_CONN_TX; 2964 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2965 elems.challenge - 2, elems.challenge_len + 2, 2966 auth_data->bss->bssid, auth_data->bss->bssid, 2967 auth_data->key, auth_data->key_len, 2968 auth_data->key_idx, tx_flags); 2969 } 2970 2971 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2972 const u8 *bssid) 2973 { 2974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2975 struct sta_info *sta; 2976 bool result = true; 2977 2978 sdata_info(sdata, "authenticated\n"); 2979 ifmgd->auth_data->done = true; 2980 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2981 ifmgd->auth_data->timeout_started = true; 2982 run_again(sdata, ifmgd->auth_data->timeout); 2983 2984 /* move station state to auth */ 2985 mutex_lock(&sdata->local->sta_mtx); 2986 sta = sta_info_get(sdata, bssid); 2987 if (!sta) { 2988 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2989 result = false; 2990 goto out; 2991 } 2992 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2993 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2994 result = false; 2995 goto out; 2996 } 2997 2998 out: 2999 mutex_unlock(&sdata->local->sta_mtx); 3000 return result; 3001 } 3002 3003 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3004 struct ieee80211_mgmt *mgmt, size_t len) 3005 { 3006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3007 u8 bssid[ETH_ALEN]; 3008 u16 auth_alg, auth_transaction, status_code; 3009 struct ieee80211_event event = { 3010 .type = MLME_EVENT, 3011 .u.mlme.data = AUTH_EVENT, 3012 }; 3013 3014 sdata_assert_lock(sdata); 3015 3016 if (len < 24 + 6) 3017 return; 3018 3019 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3020 return; 3021 3022 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3023 3024 if (!ether_addr_equal(bssid, mgmt->bssid)) 3025 return; 3026 3027 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3028 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3029 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3030 3031 if (auth_alg != ifmgd->auth_data->algorithm || 3032 (auth_alg != WLAN_AUTH_SAE && 3033 auth_transaction != ifmgd->auth_data->expected_transaction) || 3034 (auth_alg == WLAN_AUTH_SAE && 3035 (auth_transaction < ifmgd->auth_data->expected_transaction || 3036 auth_transaction > 2))) { 3037 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3038 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3039 auth_transaction, 3040 ifmgd->auth_data->expected_transaction); 3041 return; 3042 } 3043 3044 if (status_code != WLAN_STATUS_SUCCESS) { 3045 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3046 3047 if (auth_alg == WLAN_AUTH_SAE && 3048 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3049 (auth_transaction == 1 && 3050 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3051 status_code == WLAN_STATUS_SAE_PK)))) 3052 return; 3053 3054 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3055 mgmt->sa, status_code); 3056 ieee80211_destroy_auth_data(sdata, false); 3057 event.u.mlme.status = MLME_DENIED; 3058 event.u.mlme.reason = status_code; 3059 drv_event_callback(sdata->local, sdata, &event); 3060 return; 3061 } 3062 3063 switch (ifmgd->auth_data->algorithm) { 3064 case WLAN_AUTH_OPEN: 3065 case WLAN_AUTH_LEAP: 3066 case WLAN_AUTH_FT: 3067 case WLAN_AUTH_SAE: 3068 case WLAN_AUTH_FILS_SK: 3069 case WLAN_AUTH_FILS_SK_PFS: 3070 case WLAN_AUTH_FILS_PK: 3071 break; 3072 case WLAN_AUTH_SHARED_KEY: 3073 if (ifmgd->auth_data->expected_transaction != 4) { 3074 ieee80211_auth_challenge(sdata, mgmt, len); 3075 /* need another frame */ 3076 return; 3077 } 3078 break; 3079 default: 3080 WARN_ONCE(1, "invalid auth alg %d", 3081 ifmgd->auth_data->algorithm); 3082 return; 3083 } 3084 3085 event.u.mlme.status = MLME_SUCCESS; 3086 drv_event_callback(sdata->local, sdata, &event); 3087 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3088 (auth_transaction == 2 && 3089 ifmgd->auth_data->expected_transaction == 2)) { 3090 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3091 return; /* ignore frame -- wait for timeout */ 3092 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3093 auth_transaction == 2) { 3094 sdata_info(sdata, "SAE peer confirmed\n"); 3095 ifmgd->auth_data->peer_confirmed = true; 3096 } 3097 3098 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3099 } 3100 3101 #define case_WLAN(type) \ 3102 case WLAN_REASON_##type: return #type 3103 3104 const char *ieee80211_get_reason_code_string(u16 reason_code) 3105 { 3106 switch (reason_code) { 3107 case_WLAN(UNSPECIFIED); 3108 case_WLAN(PREV_AUTH_NOT_VALID); 3109 case_WLAN(DEAUTH_LEAVING); 3110 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3111 case_WLAN(DISASSOC_AP_BUSY); 3112 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3113 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3114 case_WLAN(DISASSOC_STA_HAS_LEFT); 3115 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3116 case_WLAN(DISASSOC_BAD_POWER); 3117 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3118 case_WLAN(INVALID_IE); 3119 case_WLAN(MIC_FAILURE); 3120 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3121 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3122 case_WLAN(IE_DIFFERENT); 3123 case_WLAN(INVALID_GROUP_CIPHER); 3124 case_WLAN(INVALID_PAIRWISE_CIPHER); 3125 case_WLAN(INVALID_AKMP); 3126 case_WLAN(UNSUPP_RSN_VERSION); 3127 case_WLAN(INVALID_RSN_IE_CAP); 3128 case_WLAN(IEEE8021X_FAILED); 3129 case_WLAN(CIPHER_SUITE_REJECTED); 3130 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3131 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3132 case_WLAN(DISASSOC_LOW_ACK); 3133 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3134 case_WLAN(QSTA_LEAVE_QBSS); 3135 case_WLAN(QSTA_NOT_USE); 3136 case_WLAN(QSTA_REQUIRE_SETUP); 3137 case_WLAN(QSTA_TIMEOUT); 3138 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3139 case_WLAN(MESH_PEER_CANCELED); 3140 case_WLAN(MESH_MAX_PEERS); 3141 case_WLAN(MESH_CONFIG); 3142 case_WLAN(MESH_CLOSE); 3143 case_WLAN(MESH_MAX_RETRIES); 3144 case_WLAN(MESH_CONFIRM_TIMEOUT); 3145 case_WLAN(MESH_INVALID_GTK); 3146 case_WLAN(MESH_INCONSISTENT_PARAM); 3147 case_WLAN(MESH_INVALID_SECURITY); 3148 case_WLAN(MESH_PATH_ERROR); 3149 case_WLAN(MESH_PATH_NOFORWARD); 3150 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3151 case_WLAN(MAC_EXISTS_IN_MBSS); 3152 case_WLAN(MESH_CHAN_REGULATORY); 3153 case_WLAN(MESH_CHAN); 3154 default: return "<unknown>"; 3155 } 3156 } 3157 3158 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3159 struct ieee80211_mgmt *mgmt, size_t len) 3160 { 3161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3162 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3163 3164 sdata_assert_lock(sdata); 3165 3166 if (len < 24 + 2) 3167 return; 3168 3169 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3170 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3171 return; 3172 } 3173 3174 if (ifmgd->associated && 3175 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3176 const u8 *bssid = ifmgd->associated->bssid; 3177 3178 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3179 bssid, reason_code, 3180 ieee80211_get_reason_code_string(reason_code)); 3181 3182 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3183 3184 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3185 reason_code, false); 3186 return; 3187 } 3188 3189 if (ifmgd->assoc_data && 3190 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3191 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3192 3193 sdata_info(sdata, 3194 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3195 bssid, reason_code, 3196 ieee80211_get_reason_code_string(reason_code)); 3197 3198 ieee80211_destroy_assoc_data(sdata, false, true); 3199 3200 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3201 return; 3202 } 3203 } 3204 3205 3206 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3207 struct ieee80211_mgmt *mgmt, size_t len) 3208 { 3209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3210 u16 reason_code; 3211 3212 sdata_assert_lock(sdata); 3213 3214 if (len < 24 + 2) 3215 return; 3216 3217 if (!ifmgd->associated || 3218 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3219 return; 3220 3221 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3222 3223 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3224 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3225 return; 3226 } 3227 3228 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3229 mgmt->sa, reason_code, 3230 ieee80211_get_reason_code_string(reason_code)); 3231 3232 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3233 3234 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3235 false); 3236 } 3237 3238 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3239 u8 *supp_rates, unsigned int supp_rates_len, 3240 u32 *rates, u32 *basic_rates, 3241 bool *have_higher_than_11mbit, 3242 int *min_rate, int *min_rate_index, 3243 int shift) 3244 { 3245 int i, j; 3246 3247 for (i = 0; i < supp_rates_len; i++) { 3248 int rate = supp_rates[i] & 0x7f; 3249 bool is_basic = !!(supp_rates[i] & 0x80); 3250 3251 if ((rate * 5 * (1 << shift)) > 110) 3252 *have_higher_than_11mbit = true; 3253 3254 /* 3255 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3256 * since they're not rates. 3257 * 3258 * Note: Even though the membership selector and the basic 3259 * rate flag share the same bit, they are not exactly 3260 * the same. 3261 */ 3262 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3263 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3264 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3265 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3266 continue; 3267 3268 for (j = 0; j < sband->n_bitrates; j++) { 3269 struct ieee80211_rate *br; 3270 int brate; 3271 3272 br = &sband->bitrates[j]; 3273 3274 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3275 if (brate == rate) { 3276 *rates |= BIT(j); 3277 if (is_basic) 3278 *basic_rates |= BIT(j); 3279 if ((rate * 5) < *min_rate) { 3280 *min_rate = rate * 5; 3281 *min_rate_index = j; 3282 } 3283 break; 3284 } 3285 } 3286 } 3287 } 3288 3289 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3290 const struct ieee802_11_elems *elems) 3291 { 3292 if (elems->ext_capab_len < 10) 3293 return false; 3294 3295 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3296 return false; 3297 3298 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3299 IEEE80211_HE_MAC_CAP0_TWT_RES; 3300 } 3301 3302 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3303 struct sta_info *sta, 3304 struct ieee802_11_elems *elems) 3305 { 3306 bool twt = ieee80211_twt_req_supported(sta, elems); 3307 3308 if (sdata->vif.bss_conf.twt_requester != twt) { 3309 sdata->vif.bss_conf.twt_requester = twt; 3310 return BSS_CHANGED_TWT; 3311 } 3312 return 0; 3313 } 3314 3315 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3316 struct cfg80211_bss *cbss, 3317 struct ieee80211_mgmt *mgmt, size_t len, 3318 struct ieee802_11_elems *elems) 3319 { 3320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3321 struct ieee80211_local *local = sdata->local; 3322 struct ieee80211_supported_band *sband; 3323 struct sta_info *sta; 3324 u16 capab_info, aid; 3325 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3326 const struct cfg80211_bss_ies *bss_ies = NULL; 3327 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3328 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3329 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3330 u32 changed = 0; 3331 u8 *pos; 3332 int err; 3333 bool ret; 3334 3335 /* AssocResp and ReassocResp have identical structure */ 3336 3337 pos = mgmt->u.assoc_resp.variable; 3338 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3339 if (is_s1g) { 3340 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3341 aid = 0; /* TODO */ 3342 } 3343 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3344 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems, 3345 mgmt->bssid, assoc_data->bss->bssid); 3346 3347 if (elems->aid_resp) 3348 aid = le16_to_cpu(elems->aid_resp->aid); 3349 3350 /* 3351 * The 5 MSB of the AID field are reserved 3352 * (802.11-2016 9.4.1.8 AID field) 3353 */ 3354 aid &= 0x7ff; 3355 3356 ifmgd->broken_ap = false; 3357 3358 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3359 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3360 aid); 3361 aid = 0; 3362 ifmgd->broken_ap = true; 3363 } 3364 3365 if (!is_s1g && !elems->supp_rates) { 3366 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3367 return false; 3368 } 3369 3370 sdata->vif.bss_conf.aid = aid; 3371 ifmgd->tdls_chan_switch_prohibited = 3372 elems->ext_capab && elems->ext_capab_len >= 5 && 3373 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3374 3375 /* 3376 * Some APs are erroneously not including some information in their 3377 * (re)association response frames. Try to recover by using the data 3378 * from the beacon or probe response. This seems to afflict mobile 3379 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3380 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3381 */ 3382 if (!is_6ghz && 3383 ((assoc_data->wmm && !elems->wmm_param) || 3384 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3385 (!elems->ht_cap_elem || !elems->ht_operation)) || 3386 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3387 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3388 const struct cfg80211_bss_ies *ies; 3389 struct ieee802_11_elems bss_elems; 3390 3391 rcu_read_lock(); 3392 ies = rcu_dereference(cbss->ies); 3393 if (ies) 3394 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3395 GFP_ATOMIC); 3396 rcu_read_unlock(); 3397 if (!bss_ies) 3398 return false; 3399 3400 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3401 false, &bss_elems, 3402 mgmt->bssid, 3403 assoc_data->bss->bssid); 3404 if (assoc_data->wmm && 3405 !elems->wmm_param && bss_elems.wmm_param) { 3406 elems->wmm_param = bss_elems.wmm_param; 3407 sdata_info(sdata, 3408 "AP bug: WMM param missing from AssocResp\n"); 3409 } 3410 3411 /* 3412 * Also check if we requested HT/VHT, otherwise the AP doesn't 3413 * have to include the IEs in the (re)association response. 3414 */ 3415 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3416 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3417 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3418 sdata_info(sdata, 3419 "AP bug: HT capability missing from AssocResp\n"); 3420 } 3421 if (!elems->ht_operation && bss_elems.ht_operation && 3422 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3423 elems->ht_operation = bss_elems.ht_operation; 3424 sdata_info(sdata, 3425 "AP bug: HT operation missing from AssocResp\n"); 3426 } 3427 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3428 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3429 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3430 sdata_info(sdata, 3431 "AP bug: VHT capa missing from AssocResp\n"); 3432 } 3433 if (!elems->vht_operation && bss_elems.vht_operation && 3434 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3435 elems->vht_operation = bss_elems.vht_operation; 3436 sdata_info(sdata, 3437 "AP bug: VHT operation missing from AssocResp\n"); 3438 } 3439 } 3440 3441 /* 3442 * We previously checked these in the beacon/probe response, so 3443 * they should be present here. This is just a safety net. 3444 */ 3445 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3446 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3447 sdata_info(sdata, 3448 "HT AP is missing WMM params or HT capability/operation\n"); 3449 ret = false; 3450 goto out; 3451 } 3452 3453 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3454 (!elems->vht_cap_elem || !elems->vht_operation)) { 3455 sdata_info(sdata, 3456 "VHT AP is missing VHT capability/operation\n"); 3457 ret = false; 3458 goto out; 3459 } 3460 3461 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3462 !elems->he_6ghz_capa) { 3463 sdata_info(sdata, 3464 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3465 ret = false; 3466 goto out; 3467 } 3468 3469 mutex_lock(&sdata->local->sta_mtx); 3470 /* 3471 * station info was already allocated and inserted before 3472 * the association and should be available to us 3473 */ 3474 sta = sta_info_get(sdata, cbss->bssid); 3475 if (WARN_ON(!sta)) { 3476 mutex_unlock(&sdata->local->sta_mtx); 3477 ret = false; 3478 goto out; 3479 } 3480 3481 sband = ieee80211_get_sband(sdata); 3482 if (!sband) { 3483 mutex_unlock(&sdata->local->sta_mtx); 3484 ret = false; 3485 goto out; 3486 } 3487 3488 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3489 (!elems->he_cap || !elems->he_operation)) { 3490 mutex_unlock(&sdata->local->sta_mtx); 3491 sdata_info(sdata, 3492 "HE AP is missing HE capability/operation\n"); 3493 ret = false; 3494 goto out; 3495 } 3496 3497 /* Set up internal HT/VHT capabilities */ 3498 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3499 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3500 elems->ht_cap_elem, sta); 3501 3502 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3503 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3504 elems->vht_cap_elem, sta); 3505 3506 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3507 elems->he_cap) { 3508 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3509 elems->he_cap, 3510 elems->he_cap_len, 3511 elems->he_6ghz_capa, 3512 sta); 3513 3514 bss_conf->he_support = sta->sta.he_cap.has_he; 3515 if (elems->rsnx && elems->rsnx_len && 3516 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3517 wiphy_ext_feature_isset(local->hw.wiphy, 3518 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3519 bss_conf->twt_protected = true; 3520 else 3521 bss_conf->twt_protected = false; 3522 3523 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3524 } else { 3525 bss_conf->he_support = false; 3526 bss_conf->twt_requester = false; 3527 bss_conf->twt_protected = false; 3528 } 3529 3530 if (bss_conf->he_support) { 3531 bss_conf->he_bss_color.color = 3532 le32_get_bits(elems->he_operation->he_oper_params, 3533 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3534 bss_conf->he_bss_color.partial = 3535 le32_get_bits(elems->he_operation->he_oper_params, 3536 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3537 bss_conf->he_bss_color.enabled = 3538 !le32_get_bits(elems->he_operation->he_oper_params, 3539 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3540 3541 if (bss_conf->he_bss_color.enabled) 3542 changed |= BSS_CHANGED_HE_BSS_COLOR; 3543 3544 bss_conf->htc_trig_based_pkt_ext = 3545 le32_get_bits(elems->he_operation->he_oper_params, 3546 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3547 bss_conf->frame_time_rts_th = 3548 le32_get_bits(elems->he_operation->he_oper_params, 3549 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3550 3551 bss_conf->uora_exists = !!elems->uora_element; 3552 if (elems->uora_element) 3553 bss_conf->uora_ocw_range = elems->uora_element[0]; 3554 3555 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3556 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3557 /* TODO: OPEN: what happens if BSS color disable is set? */ 3558 } 3559 3560 if (cbss->transmitted_bss) { 3561 bss_conf->nontransmitted = true; 3562 ether_addr_copy(bss_conf->transmitter_bssid, 3563 cbss->transmitted_bss->bssid); 3564 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3565 bss_conf->bssid_index = cbss->bssid_index; 3566 } 3567 3568 /* 3569 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3570 * in their association response, so ignore that data for our own 3571 * configuration. If it changed since the last beacon, we'll get the 3572 * next beacon and update then. 3573 */ 3574 3575 /* 3576 * If an operating mode notification IE is present, override the 3577 * NSS calculation (that would be done in rate_control_rate_init()) 3578 * and use the # of streams from that element. 3579 */ 3580 if (elems->opmode_notif && 3581 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3582 u8 nss; 3583 3584 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3585 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3586 nss += 1; 3587 sta->sta.rx_nss = nss; 3588 } 3589 3590 rate_control_rate_init(sta); 3591 3592 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3593 set_sta_flag(sta, WLAN_STA_MFP); 3594 sta->sta.mfp = true; 3595 } else { 3596 sta->sta.mfp = false; 3597 } 3598 3599 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3600 local->hw.queues >= IEEE80211_NUM_ACS; 3601 3602 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3603 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3604 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3605 if (err) { 3606 sdata_info(sdata, 3607 "failed to move station %pM to desired state\n", 3608 sta->sta.addr); 3609 WARN_ON(__sta_info_destroy(sta)); 3610 mutex_unlock(&sdata->local->sta_mtx); 3611 ret = false; 3612 goto out; 3613 } 3614 3615 if (sdata->wdev.use_4addr) 3616 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3617 3618 mutex_unlock(&sdata->local->sta_mtx); 3619 3620 /* 3621 * Always handle WMM once after association regardless 3622 * of the first value the AP uses. Setting -1 here has 3623 * that effect because the AP values is an unsigned 3624 * 4-bit value. 3625 */ 3626 ifmgd->wmm_last_param_set = -1; 3627 ifmgd->mu_edca_last_param_set = -1; 3628 3629 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3630 ieee80211_set_wmm_default(sdata, false, false); 3631 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3632 elems->wmm_param_len, 3633 elems->mu_edca_param_set)) { 3634 /* still enable QoS since we might have HT/VHT */ 3635 ieee80211_set_wmm_default(sdata, false, true); 3636 /* set the disable-WMM flag in this case to disable 3637 * tracking WMM parameter changes in the beacon if 3638 * the parameters weren't actually valid. Doing so 3639 * avoids changing parameters very strangely when 3640 * the AP is going back and forth between valid and 3641 * invalid parameters. 3642 */ 3643 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3644 } 3645 changed |= BSS_CHANGED_QOS; 3646 3647 if (elems->max_idle_period_ie) { 3648 bss_conf->max_idle_period = 3649 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3650 bss_conf->protected_keep_alive = 3651 !!(elems->max_idle_period_ie->idle_options & 3652 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3653 changed |= BSS_CHANGED_KEEP_ALIVE; 3654 } else { 3655 bss_conf->max_idle_period = 0; 3656 bss_conf->protected_keep_alive = false; 3657 } 3658 3659 /* set assoc capability (AID was already set earlier), 3660 * ieee80211_set_associated() will tell the driver */ 3661 bss_conf->assoc_capability = capab_info; 3662 ieee80211_set_associated(sdata, cbss, changed); 3663 3664 /* 3665 * If we're using 4-addr mode, let the AP know that we're 3666 * doing so, so that it can create the STA VLAN on its side 3667 */ 3668 if (ifmgd->use_4addr) 3669 ieee80211_send_4addr_nullfunc(local, sdata); 3670 3671 /* 3672 * Start timer to probe the connection to the AP now. 3673 * Also start the timer that will detect beacon loss. 3674 */ 3675 ieee80211_sta_reset_beacon_monitor(sdata); 3676 ieee80211_sta_reset_conn_monitor(sdata); 3677 3678 ret = true; 3679 out: 3680 kfree(bss_ies); 3681 return ret; 3682 } 3683 3684 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3685 struct ieee80211_mgmt *mgmt, 3686 size_t len) 3687 { 3688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3689 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3690 u16 capab_info, status_code, aid; 3691 struct ieee802_11_elems elems; 3692 int ac, uapsd_queues = -1; 3693 u8 *pos; 3694 bool reassoc; 3695 struct cfg80211_bss *cbss; 3696 struct ieee80211_event event = { 3697 .type = MLME_EVENT, 3698 .u.mlme.data = ASSOC_EVENT, 3699 }; 3700 3701 sdata_assert_lock(sdata); 3702 3703 if (!assoc_data) 3704 return; 3705 3706 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3707 return; 3708 3709 cbss = assoc_data->bss; 3710 3711 /* 3712 * AssocResp and ReassocResp have identical structure, so process both 3713 * of them in this function. 3714 */ 3715 3716 if (len < 24 + 6) 3717 return; 3718 3719 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3720 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3721 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3722 pos = mgmt->u.assoc_resp.variable; 3723 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3724 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3725 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3726 aid = 0; /* TODO */ 3727 } 3728 3729 sdata_info(sdata, 3730 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3731 reassoc ? "Rea" : "A", mgmt->sa, 3732 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3733 3734 if (assoc_data->fils_kek_len && 3735 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3736 return; 3737 3738 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3739 mgmt->bssid, assoc_data->bss->bssid); 3740 3741 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3742 elems.timeout_int && 3743 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3744 u32 tu, ms; 3745 tu = le32_to_cpu(elems.timeout_int->value); 3746 ms = tu * 1024 / 1000; 3747 sdata_info(sdata, 3748 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3749 mgmt->sa, tu, ms); 3750 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3751 assoc_data->timeout_started = true; 3752 if (ms > IEEE80211_ASSOC_TIMEOUT) 3753 run_again(sdata, assoc_data->timeout); 3754 return; 3755 } 3756 3757 if (status_code != WLAN_STATUS_SUCCESS) { 3758 sdata_info(sdata, "%pM denied association (code=%d)\n", 3759 mgmt->sa, status_code); 3760 ieee80211_destroy_assoc_data(sdata, false, false); 3761 event.u.mlme.status = MLME_DENIED; 3762 event.u.mlme.reason = status_code; 3763 drv_event_callback(sdata->local, sdata, &event); 3764 } else { 3765 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) { 3766 /* oops -- internal error -- send timeout for now */ 3767 ieee80211_destroy_assoc_data(sdata, false, false); 3768 cfg80211_assoc_timeout(sdata->dev, cbss); 3769 return; 3770 } 3771 event.u.mlme.status = MLME_SUCCESS; 3772 drv_event_callback(sdata->local, sdata, &event); 3773 sdata_info(sdata, "associated\n"); 3774 3775 /* 3776 * destroy assoc_data afterwards, as otherwise an idle 3777 * recalc after assoc_data is NULL but before associated 3778 * is set can cause the interface to go idle 3779 */ 3780 ieee80211_destroy_assoc_data(sdata, true, false); 3781 3782 /* get uapsd queues configuration */ 3783 uapsd_queues = 0; 3784 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3785 if (sdata->tx_conf[ac].uapsd) 3786 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3787 } 3788 3789 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3790 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3791 } 3792 3793 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3794 struct ieee80211_mgmt *mgmt, size_t len, 3795 struct ieee80211_rx_status *rx_status) 3796 { 3797 struct ieee80211_local *local = sdata->local; 3798 struct ieee80211_bss *bss; 3799 struct ieee80211_channel *channel; 3800 3801 sdata_assert_lock(sdata); 3802 3803 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3804 ieee80211_rx_status_to_khz(rx_status)); 3805 if (!channel) 3806 return; 3807 3808 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3809 if (bss) { 3810 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3811 ieee80211_rx_bss_put(local, bss); 3812 } 3813 } 3814 3815 3816 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3817 struct sk_buff *skb) 3818 { 3819 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3820 struct ieee80211_if_managed *ifmgd; 3821 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3822 struct ieee80211_channel *channel; 3823 size_t baselen, len = skb->len; 3824 3825 ifmgd = &sdata->u.mgd; 3826 3827 sdata_assert_lock(sdata); 3828 3829 /* 3830 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3831 * "If a 6 GHz AP receives a Probe Request frame and responds with 3832 * a Probe Response frame [..], the Address 1 field of the Probe 3833 * Response frame shall be set to the broadcast address [..]" 3834 * So, on 6GHz band we should also accept broadcast responses. 3835 */ 3836 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3837 rx_status->freq); 3838 if (!channel) 3839 return; 3840 3841 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3842 (channel->band != NL80211_BAND_6GHZ || 3843 !is_broadcast_ether_addr(mgmt->da))) 3844 return; /* ignore ProbeResp to foreign address */ 3845 3846 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3847 if (baselen > len) 3848 return; 3849 3850 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3851 3852 if (ifmgd->associated && 3853 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3854 ieee80211_reset_ap_probe(sdata); 3855 } 3856 3857 /* 3858 * This is the canonical list of information elements we care about, 3859 * the filter code also gives us all changes to the Microsoft OUI 3860 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3861 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3862 * changes to requested client power. 3863 * 3864 * We implement beacon filtering in software since that means we can 3865 * avoid processing the frame here and in cfg80211, and userspace 3866 * will not be able to tell whether the hardware supports it or not. 3867 * 3868 * XXX: This list needs to be dynamic -- userspace needs to be able to 3869 * add items it requires. It also needs to be able to tell us to 3870 * look out for other vendor IEs. 3871 */ 3872 static const u64 care_about_ies = 3873 (1ULL << WLAN_EID_COUNTRY) | 3874 (1ULL << WLAN_EID_ERP_INFO) | 3875 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3876 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3877 (1ULL << WLAN_EID_HT_CAPABILITY) | 3878 (1ULL << WLAN_EID_HT_OPERATION) | 3879 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3880 3881 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3882 struct ieee80211_if_managed *ifmgd, 3883 struct ieee80211_bss_conf *bss_conf, 3884 struct ieee80211_local *local, 3885 struct ieee80211_rx_status *rx_status) 3886 { 3887 /* Track average RSSI from the Beacon frames of the current AP */ 3888 3889 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3890 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3891 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3892 ifmgd->last_cqm_event_signal = 0; 3893 ifmgd->count_beacon_signal = 1; 3894 ifmgd->last_ave_beacon_signal = 0; 3895 } else { 3896 ifmgd->count_beacon_signal++; 3897 } 3898 3899 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3900 3901 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3902 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3903 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3904 int last_sig = ifmgd->last_ave_beacon_signal; 3905 struct ieee80211_event event = { 3906 .type = RSSI_EVENT, 3907 }; 3908 3909 /* 3910 * if signal crosses either of the boundaries, invoke callback 3911 * with appropriate parameters 3912 */ 3913 if (sig > ifmgd->rssi_max_thold && 3914 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3915 ifmgd->last_ave_beacon_signal = sig; 3916 event.u.rssi.data = RSSI_EVENT_HIGH; 3917 drv_event_callback(local, sdata, &event); 3918 } else if (sig < ifmgd->rssi_min_thold && 3919 (last_sig >= ifmgd->rssi_max_thold || 3920 last_sig == 0)) { 3921 ifmgd->last_ave_beacon_signal = sig; 3922 event.u.rssi.data = RSSI_EVENT_LOW; 3923 drv_event_callback(local, sdata, &event); 3924 } 3925 } 3926 3927 if (bss_conf->cqm_rssi_thold && 3928 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3929 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3930 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3931 int last_event = ifmgd->last_cqm_event_signal; 3932 int thold = bss_conf->cqm_rssi_thold; 3933 int hyst = bss_conf->cqm_rssi_hyst; 3934 3935 if (sig < thold && 3936 (last_event == 0 || sig < last_event - hyst)) { 3937 ifmgd->last_cqm_event_signal = sig; 3938 ieee80211_cqm_rssi_notify( 3939 &sdata->vif, 3940 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3941 sig, GFP_KERNEL); 3942 } else if (sig > thold && 3943 (last_event == 0 || sig > last_event + hyst)) { 3944 ifmgd->last_cqm_event_signal = sig; 3945 ieee80211_cqm_rssi_notify( 3946 &sdata->vif, 3947 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3948 sig, GFP_KERNEL); 3949 } 3950 } 3951 3952 if (bss_conf->cqm_rssi_low && 3953 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3954 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3955 int last_event = ifmgd->last_cqm_event_signal; 3956 int low = bss_conf->cqm_rssi_low; 3957 int high = bss_conf->cqm_rssi_high; 3958 3959 if (sig < low && 3960 (last_event == 0 || last_event >= low)) { 3961 ifmgd->last_cqm_event_signal = sig; 3962 ieee80211_cqm_rssi_notify( 3963 &sdata->vif, 3964 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3965 sig, GFP_KERNEL); 3966 } else if (sig > high && 3967 (last_event == 0 || last_event <= high)) { 3968 ifmgd->last_cqm_event_signal = sig; 3969 ieee80211_cqm_rssi_notify( 3970 &sdata->vif, 3971 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3972 sig, GFP_KERNEL); 3973 } 3974 } 3975 } 3976 3977 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3978 struct cfg80211_bss *bss) 3979 { 3980 if (ether_addr_equal(tx_bssid, bss->bssid)) 3981 return true; 3982 if (!bss->transmitted_bss) 3983 return false; 3984 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3985 } 3986 3987 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3988 struct ieee80211_hdr *hdr, size_t len, 3989 struct ieee80211_rx_status *rx_status) 3990 { 3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3992 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3993 struct ieee80211_mgmt *mgmt = (void *) hdr; 3994 size_t baselen; 3995 struct ieee802_11_elems elems; 3996 struct ieee80211_local *local = sdata->local; 3997 struct ieee80211_chanctx_conf *chanctx_conf; 3998 struct ieee80211_channel *chan; 3999 struct sta_info *sta; 4000 u32 changed = 0; 4001 bool erp_valid; 4002 u8 erp_value = 0; 4003 u32 ncrc = 0; 4004 u8 *bssid, *variable = mgmt->u.beacon.variable; 4005 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4006 4007 sdata_assert_lock(sdata); 4008 4009 /* Process beacon from the current BSS */ 4010 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4011 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4012 struct ieee80211_ext *ext = (void *) mgmt; 4013 4014 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4015 variable = ext->u.s1g_short_beacon.variable; 4016 else 4017 variable = ext->u.s1g_beacon.variable; 4018 } 4019 4020 baselen = (u8 *) variable - (u8 *) mgmt; 4021 if (baselen > len) 4022 return; 4023 4024 rcu_read_lock(); 4025 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4026 if (!chanctx_conf) { 4027 rcu_read_unlock(); 4028 return; 4029 } 4030 4031 if (ieee80211_rx_status_to_khz(rx_status) != 4032 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4033 rcu_read_unlock(); 4034 return; 4035 } 4036 chan = chanctx_conf->def.chan; 4037 rcu_read_unlock(); 4038 4039 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4040 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4041 ieee802_11_parse_elems(variable, 4042 len - baselen, false, &elems, 4043 bssid, 4044 ifmgd->assoc_data->bss->bssid); 4045 4046 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4047 4048 if (elems.dtim_period) 4049 ifmgd->dtim_period = elems.dtim_period; 4050 ifmgd->have_beacon = true; 4051 ifmgd->assoc_data->need_beacon = false; 4052 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4053 sdata->vif.bss_conf.sync_tsf = 4054 le64_to_cpu(mgmt->u.beacon.timestamp); 4055 sdata->vif.bss_conf.sync_device_ts = 4056 rx_status->device_timestamp; 4057 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4058 } 4059 4060 if (elems.mbssid_config_ie) 4061 bss_conf->profile_periodicity = 4062 elems.mbssid_config_ie->profile_periodicity; 4063 4064 if (elems.ext_capab_len >= 11 && 4065 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4066 bss_conf->ema_ap = true; 4067 4068 /* continue assoc process */ 4069 ifmgd->assoc_data->timeout = jiffies; 4070 ifmgd->assoc_data->timeout_started = true; 4071 run_again(sdata, ifmgd->assoc_data->timeout); 4072 return; 4073 } 4074 4075 if (!ifmgd->associated || 4076 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4077 return; 4078 bssid = ifmgd->associated->bssid; 4079 4080 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4081 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4082 local, rx_status); 4083 4084 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4085 mlme_dbg_ratelimited(sdata, 4086 "cancelling AP probe due to a received beacon\n"); 4087 ieee80211_reset_ap_probe(sdata); 4088 } 4089 4090 /* 4091 * Push the beacon loss detection into the future since 4092 * we are processing a beacon from the AP just now. 4093 */ 4094 ieee80211_sta_reset_beacon_monitor(sdata); 4095 4096 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4097 * element (which carries the beacon interval). Don't forget to add a 4098 * bit to care_about_ies[] above if mac80211 is interested in a 4099 * changing S1G element. 4100 */ 4101 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4102 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4103 ncrc = ieee802_11_parse_elems_crc(variable, 4104 len - baselen, false, &elems, 4105 care_about_ies, ncrc, 4106 mgmt->bssid, bssid); 4107 4108 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4109 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 4110 if (local->hw.conf.dynamic_ps_timeout > 0) { 4111 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4112 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4113 ieee80211_hw_config(local, 4114 IEEE80211_CONF_CHANGE_PS); 4115 } 4116 ieee80211_send_nullfunc(local, sdata, false); 4117 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4118 local->pspolling = true; 4119 4120 /* 4121 * Here is assumed that the driver will be 4122 * able to send ps-poll frame and receive a 4123 * response even though power save mode is 4124 * enabled, but some drivers might require 4125 * to disable power save here. This needs 4126 * to be investigated. 4127 */ 4128 ieee80211_send_pspoll(local, sdata); 4129 } 4130 } 4131 4132 if (sdata->vif.p2p || 4133 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4134 struct ieee80211_p2p_noa_attr noa = {}; 4135 int ret; 4136 4137 ret = cfg80211_get_p2p_attr(variable, 4138 len - baselen, 4139 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4140 (u8 *) &noa, sizeof(noa)); 4141 if (ret >= 2) { 4142 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4143 /* valid noa_attr and index changed */ 4144 sdata->u.mgd.p2p_noa_index = noa.index; 4145 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4146 changed |= BSS_CHANGED_P2P_PS; 4147 /* 4148 * make sure we update all information, the CRC 4149 * mechanism doesn't look at P2P attributes. 4150 */ 4151 ifmgd->beacon_crc_valid = false; 4152 } 4153 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4154 /* noa_attr not found and we had valid noa_attr before */ 4155 sdata->u.mgd.p2p_noa_index = -1; 4156 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4157 changed |= BSS_CHANGED_P2P_PS; 4158 ifmgd->beacon_crc_valid = false; 4159 } 4160 } 4161 4162 if (ifmgd->csa_waiting_bcn) 4163 ieee80211_chswitch_post_beacon(sdata); 4164 4165 /* 4166 * Update beacon timing and dtim count on every beacon appearance. This 4167 * will allow the driver to use the most updated values. Do it before 4168 * comparing this one with last received beacon. 4169 * IMPORTANT: These parameters would possibly be out of sync by the time 4170 * the driver will use them. The synchronized view is currently 4171 * guaranteed only in certain callbacks. 4172 */ 4173 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4174 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4175 sdata->vif.bss_conf.sync_tsf = 4176 le64_to_cpu(mgmt->u.beacon.timestamp); 4177 sdata->vif.bss_conf.sync_device_ts = 4178 rx_status->device_timestamp; 4179 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4180 } 4181 4182 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4183 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4184 return; 4185 ifmgd->beacon_crc = ncrc; 4186 ifmgd->beacon_crc_valid = true; 4187 4188 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4189 4190 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4191 rx_status->device_timestamp, 4192 &elems, true); 4193 4194 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4195 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4196 elems.wmm_param_len, 4197 elems.mu_edca_param_set)) 4198 changed |= BSS_CHANGED_QOS; 4199 4200 /* 4201 * If we haven't had a beacon before, tell the driver about the 4202 * DTIM period (and beacon timing if desired) now. 4203 */ 4204 if (!ifmgd->have_beacon) { 4205 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4206 bss_conf->dtim_period = elems.dtim_period ?: 1; 4207 4208 changed |= BSS_CHANGED_BEACON_INFO; 4209 ifmgd->have_beacon = true; 4210 4211 mutex_lock(&local->iflist_mtx); 4212 ieee80211_recalc_ps(local); 4213 mutex_unlock(&local->iflist_mtx); 4214 4215 ieee80211_recalc_ps_vif(sdata); 4216 } 4217 4218 if (elems.erp_info) { 4219 erp_valid = true; 4220 erp_value = elems.erp_info[0]; 4221 } else { 4222 erp_valid = false; 4223 } 4224 4225 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4226 changed |= ieee80211_handle_bss_capability(sdata, 4227 le16_to_cpu(mgmt->u.beacon.capab_info), 4228 erp_valid, erp_value); 4229 4230 mutex_lock(&local->sta_mtx); 4231 sta = sta_info_get(sdata, bssid); 4232 4233 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4234 4235 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4236 elems.vht_cap_elem, elems.ht_operation, 4237 elems.vht_operation, elems.he_operation, 4238 elems.s1g_oper, bssid, &changed)) { 4239 mutex_unlock(&local->sta_mtx); 4240 sdata_info(sdata, 4241 "failed to follow AP %pM bandwidth change, disconnect\n", 4242 bssid); 4243 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4244 WLAN_REASON_DEAUTH_LEAVING, 4245 true, deauth_buf); 4246 ieee80211_report_disconnect(sdata, deauth_buf, 4247 sizeof(deauth_buf), true, 4248 WLAN_REASON_DEAUTH_LEAVING, 4249 false); 4250 return; 4251 } 4252 4253 if (sta && elems.opmode_notif) 4254 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4255 rx_status->band); 4256 mutex_unlock(&local->sta_mtx); 4257 4258 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4259 elems.country_elem, 4260 elems.country_elem_len, 4261 elems.pwr_constr_elem, 4262 elems.cisco_dtpc_elem); 4263 4264 ieee80211_bss_info_change_notify(sdata, changed); 4265 } 4266 4267 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4268 struct sk_buff *skb) 4269 { 4270 struct ieee80211_rx_status *rx_status; 4271 struct ieee80211_hdr *hdr; 4272 u16 fc; 4273 4274 rx_status = (struct ieee80211_rx_status *) skb->cb; 4275 hdr = (struct ieee80211_hdr *) skb->data; 4276 fc = le16_to_cpu(hdr->frame_control); 4277 4278 sdata_lock(sdata); 4279 switch (fc & IEEE80211_FCTL_STYPE) { 4280 case IEEE80211_STYPE_S1G_BEACON: 4281 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4282 break; 4283 } 4284 sdata_unlock(sdata); 4285 } 4286 4287 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4288 struct sk_buff *skb) 4289 { 4290 struct ieee80211_rx_status *rx_status; 4291 struct ieee80211_mgmt *mgmt; 4292 u16 fc; 4293 struct ieee802_11_elems elems; 4294 int ies_len; 4295 4296 rx_status = (struct ieee80211_rx_status *) skb->cb; 4297 mgmt = (struct ieee80211_mgmt *) skb->data; 4298 fc = le16_to_cpu(mgmt->frame_control); 4299 4300 sdata_lock(sdata); 4301 4302 switch (fc & IEEE80211_FCTL_STYPE) { 4303 case IEEE80211_STYPE_BEACON: 4304 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4305 skb->len, rx_status); 4306 break; 4307 case IEEE80211_STYPE_PROBE_RESP: 4308 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4309 break; 4310 case IEEE80211_STYPE_AUTH: 4311 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4312 break; 4313 case IEEE80211_STYPE_DEAUTH: 4314 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4315 break; 4316 case IEEE80211_STYPE_DISASSOC: 4317 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4318 break; 4319 case IEEE80211_STYPE_ASSOC_RESP: 4320 case IEEE80211_STYPE_REASSOC_RESP: 4321 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4322 break; 4323 case IEEE80211_STYPE_ACTION: 4324 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4325 ies_len = skb->len - 4326 offsetof(struct ieee80211_mgmt, 4327 u.action.u.chan_switch.variable); 4328 4329 if (ies_len < 0) 4330 break; 4331 4332 /* CSA IE cannot be overridden, no need for BSSID */ 4333 ieee802_11_parse_elems( 4334 mgmt->u.action.u.chan_switch.variable, 4335 ies_len, true, &elems, mgmt->bssid, NULL); 4336 4337 if (elems.parse_error) 4338 break; 4339 4340 ieee80211_sta_process_chanswitch(sdata, 4341 rx_status->mactime, 4342 rx_status->device_timestamp, 4343 &elems, false); 4344 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4345 ies_len = skb->len - 4346 offsetof(struct ieee80211_mgmt, 4347 u.action.u.ext_chan_switch.variable); 4348 4349 if (ies_len < 0) 4350 break; 4351 4352 /* 4353 * extended CSA IE can't be overridden, no need for 4354 * BSSID 4355 */ 4356 ieee802_11_parse_elems( 4357 mgmt->u.action.u.ext_chan_switch.variable, 4358 ies_len, true, &elems, mgmt->bssid, NULL); 4359 4360 if (elems.parse_error) 4361 break; 4362 4363 /* for the handling code pretend this was also an IE */ 4364 elems.ext_chansw_ie = 4365 &mgmt->u.action.u.ext_chan_switch.data; 4366 4367 ieee80211_sta_process_chanswitch(sdata, 4368 rx_status->mactime, 4369 rx_status->device_timestamp, 4370 &elems, false); 4371 } 4372 break; 4373 } 4374 sdata_unlock(sdata); 4375 } 4376 4377 static void ieee80211_sta_timer(struct timer_list *t) 4378 { 4379 struct ieee80211_sub_if_data *sdata = 4380 from_timer(sdata, t, u.mgd.timer); 4381 4382 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4383 } 4384 4385 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4386 u8 *bssid, u8 reason, bool tx) 4387 { 4388 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4389 4390 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4391 tx, frame_buf); 4392 4393 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4394 reason, false); 4395 } 4396 4397 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4398 { 4399 struct ieee80211_local *local = sdata->local; 4400 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4401 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4402 u32 tx_flags = 0; 4403 u16 trans = 1; 4404 u16 status = 0; 4405 u16 prepare_tx_duration = 0; 4406 4407 sdata_assert_lock(sdata); 4408 4409 if (WARN_ON_ONCE(!auth_data)) 4410 return -EINVAL; 4411 4412 auth_data->tries++; 4413 4414 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4415 sdata_info(sdata, "authentication with %pM timed out\n", 4416 auth_data->bss->bssid); 4417 4418 /* 4419 * Most likely AP is not in the range so remove the 4420 * bss struct for that AP. 4421 */ 4422 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4423 4424 return -ETIMEDOUT; 4425 } 4426 4427 if (auth_data->algorithm == WLAN_AUTH_SAE) 4428 prepare_tx_duration = 4429 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4430 4431 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4432 4433 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4434 auth_data->bss->bssid, auth_data->tries, 4435 IEEE80211_AUTH_MAX_TRIES); 4436 4437 auth_data->expected_transaction = 2; 4438 4439 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4440 trans = auth_data->sae_trans; 4441 status = auth_data->sae_status; 4442 auth_data->expected_transaction = trans; 4443 } 4444 4445 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4446 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4447 IEEE80211_TX_INTFL_MLME_CONN_TX; 4448 4449 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4450 auth_data->data, auth_data->data_len, 4451 auth_data->bss->bssid, 4452 auth_data->bss->bssid, NULL, 0, 0, 4453 tx_flags); 4454 4455 if (tx_flags == 0) { 4456 if (auth_data->algorithm == WLAN_AUTH_SAE) 4457 auth_data->timeout = jiffies + 4458 IEEE80211_AUTH_TIMEOUT_SAE; 4459 else 4460 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4461 } else { 4462 auth_data->timeout = 4463 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4464 } 4465 4466 auth_data->timeout_started = true; 4467 run_again(sdata, auth_data->timeout); 4468 4469 return 0; 4470 } 4471 4472 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4473 { 4474 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4475 struct ieee80211_local *local = sdata->local; 4476 4477 sdata_assert_lock(sdata); 4478 4479 assoc_data->tries++; 4480 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4481 sdata_info(sdata, "association with %pM timed out\n", 4482 assoc_data->bss->bssid); 4483 4484 /* 4485 * Most likely AP is not in the range so remove the 4486 * bss struct for that AP. 4487 */ 4488 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4489 4490 return -ETIMEDOUT; 4491 } 4492 4493 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4494 assoc_data->bss->bssid, assoc_data->tries, 4495 IEEE80211_ASSOC_MAX_TRIES); 4496 ieee80211_send_assoc(sdata); 4497 4498 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4499 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4500 assoc_data->timeout_started = true; 4501 run_again(sdata, assoc_data->timeout); 4502 } else { 4503 assoc_data->timeout = 4504 round_jiffies_up(jiffies + 4505 IEEE80211_ASSOC_TIMEOUT_LONG); 4506 assoc_data->timeout_started = true; 4507 run_again(sdata, assoc_data->timeout); 4508 } 4509 4510 return 0; 4511 } 4512 4513 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4514 __le16 fc, bool acked) 4515 { 4516 struct ieee80211_local *local = sdata->local; 4517 4518 sdata->u.mgd.status_fc = fc; 4519 sdata->u.mgd.status_acked = acked; 4520 sdata->u.mgd.status_received = true; 4521 4522 ieee80211_queue_work(&local->hw, &sdata->work); 4523 } 4524 4525 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4526 { 4527 struct ieee80211_local *local = sdata->local; 4528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4529 4530 sdata_lock(sdata); 4531 4532 if (ifmgd->status_received) { 4533 __le16 fc = ifmgd->status_fc; 4534 bool status_acked = ifmgd->status_acked; 4535 4536 ifmgd->status_received = false; 4537 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4538 if (status_acked) { 4539 if (ifmgd->auth_data->algorithm == 4540 WLAN_AUTH_SAE) 4541 ifmgd->auth_data->timeout = 4542 jiffies + 4543 IEEE80211_AUTH_TIMEOUT_SAE; 4544 else 4545 ifmgd->auth_data->timeout = 4546 jiffies + 4547 IEEE80211_AUTH_TIMEOUT_SHORT; 4548 run_again(sdata, ifmgd->auth_data->timeout); 4549 } else { 4550 ifmgd->auth_data->timeout = jiffies - 1; 4551 } 4552 ifmgd->auth_data->timeout_started = true; 4553 } else if (ifmgd->assoc_data && 4554 (ieee80211_is_assoc_req(fc) || 4555 ieee80211_is_reassoc_req(fc))) { 4556 if (status_acked) { 4557 ifmgd->assoc_data->timeout = 4558 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4559 run_again(sdata, ifmgd->assoc_data->timeout); 4560 } else { 4561 ifmgd->assoc_data->timeout = jiffies - 1; 4562 } 4563 ifmgd->assoc_data->timeout_started = true; 4564 } 4565 } 4566 4567 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4568 time_after(jiffies, ifmgd->auth_data->timeout)) { 4569 if (ifmgd->auth_data->done) { 4570 /* 4571 * ok ... we waited for assoc but userspace didn't, 4572 * so let's just kill the auth data 4573 */ 4574 ieee80211_destroy_auth_data(sdata, false); 4575 } else if (ieee80211_auth(sdata)) { 4576 u8 bssid[ETH_ALEN]; 4577 struct ieee80211_event event = { 4578 .type = MLME_EVENT, 4579 .u.mlme.data = AUTH_EVENT, 4580 .u.mlme.status = MLME_TIMEOUT, 4581 }; 4582 4583 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4584 4585 ieee80211_destroy_auth_data(sdata, false); 4586 4587 cfg80211_auth_timeout(sdata->dev, bssid); 4588 drv_event_callback(sdata->local, sdata, &event); 4589 } 4590 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4591 run_again(sdata, ifmgd->auth_data->timeout); 4592 4593 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4594 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4595 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4596 ieee80211_do_assoc(sdata)) { 4597 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4598 struct ieee80211_event event = { 4599 .type = MLME_EVENT, 4600 .u.mlme.data = ASSOC_EVENT, 4601 .u.mlme.status = MLME_TIMEOUT, 4602 }; 4603 4604 ieee80211_destroy_assoc_data(sdata, false, false); 4605 cfg80211_assoc_timeout(sdata->dev, bss); 4606 drv_event_callback(sdata->local, sdata, &event); 4607 } 4608 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4609 run_again(sdata, ifmgd->assoc_data->timeout); 4610 4611 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4612 ifmgd->associated) { 4613 u8 bssid[ETH_ALEN]; 4614 int max_tries; 4615 4616 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4617 4618 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4619 max_tries = max_nullfunc_tries; 4620 else 4621 max_tries = max_probe_tries; 4622 4623 /* ACK received for nullfunc probing frame */ 4624 if (!ifmgd->probe_send_count) 4625 ieee80211_reset_ap_probe(sdata); 4626 else if (ifmgd->nullfunc_failed) { 4627 if (ifmgd->probe_send_count < max_tries) { 4628 mlme_dbg(sdata, 4629 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4630 bssid, ifmgd->probe_send_count, 4631 max_tries); 4632 ieee80211_mgd_probe_ap_send(sdata); 4633 } else { 4634 mlme_dbg(sdata, 4635 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4636 bssid); 4637 ieee80211_sta_connection_lost(sdata, bssid, 4638 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4639 false); 4640 } 4641 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4642 run_again(sdata, ifmgd->probe_timeout); 4643 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4644 mlme_dbg(sdata, 4645 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4646 bssid, probe_wait_ms); 4647 ieee80211_sta_connection_lost(sdata, bssid, 4648 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4649 } else if (ifmgd->probe_send_count < max_tries) { 4650 mlme_dbg(sdata, 4651 "No probe response from AP %pM after %dms, try %d/%i\n", 4652 bssid, probe_wait_ms, 4653 ifmgd->probe_send_count, max_tries); 4654 ieee80211_mgd_probe_ap_send(sdata); 4655 } else { 4656 /* 4657 * We actually lost the connection ... or did we? 4658 * Let's make sure! 4659 */ 4660 mlme_dbg(sdata, 4661 "No probe response from AP %pM after %dms, disconnecting.\n", 4662 bssid, probe_wait_ms); 4663 4664 ieee80211_sta_connection_lost(sdata, bssid, 4665 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4666 } 4667 } 4668 4669 sdata_unlock(sdata); 4670 } 4671 4672 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4673 { 4674 struct ieee80211_sub_if_data *sdata = 4675 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4677 4678 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4679 return; 4680 4681 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4682 return; 4683 4684 sdata->u.mgd.connection_loss = false; 4685 ieee80211_queue_work(&sdata->local->hw, 4686 &sdata->u.mgd.beacon_connection_loss_work); 4687 } 4688 4689 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4690 { 4691 struct ieee80211_sub_if_data *sdata = 4692 from_timer(sdata, t, u.mgd.conn_mon_timer); 4693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4694 struct ieee80211_local *local = sdata->local; 4695 struct sta_info *sta; 4696 unsigned long timeout; 4697 4698 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4699 return; 4700 4701 sta = sta_info_get(sdata, ifmgd->bssid); 4702 if (!sta) 4703 return; 4704 4705 timeout = sta->status_stats.last_ack; 4706 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4707 timeout = sta->rx_stats.last_rx; 4708 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4709 4710 if (time_is_before_jiffies(timeout)) { 4711 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4712 return; 4713 } 4714 4715 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4716 } 4717 4718 static void ieee80211_sta_monitor_work(struct work_struct *work) 4719 { 4720 struct ieee80211_sub_if_data *sdata = 4721 container_of(work, struct ieee80211_sub_if_data, 4722 u.mgd.monitor_work); 4723 4724 ieee80211_mgd_probe_ap(sdata, false); 4725 } 4726 4727 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4728 { 4729 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4730 __ieee80211_stop_poll(sdata); 4731 4732 /* let's probe the connection once */ 4733 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4734 ieee80211_queue_work(&sdata->local->hw, 4735 &sdata->u.mgd.monitor_work); 4736 } 4737 } 4738 4739 #ifdef CONFIG_PM 4740 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4741 { 4742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4743 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4744 4745 sdata_lock(sdata); 4746 4747 if (ifmgd->auth_data || ifmgd->assoc_data) { 4748 const u8 *bssid = ifmgd->auth_data ? 4749 ifmgd->auth_data->bss->bssid : 4750 ifmgd->assoc_data->bss->bssid; 4751 4752 /* 4753 * If we are trying to authenticate / associate while suspending, 4754 * cfg80211 won't know and won't actually abort those attempts, 4755 * thus we need to do that ourselves. 4756 */ 4757 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4758 IEEE80211_STYPE_DEAUTH, 4759 WLAN_REASON_DEAUTH_LEAVING, 4760 false, frame_buf); 4761 if (ifmgd->assoc_data) 4762 ieee80211_destroy_assoc_data(sdata, false, true); 4763 if (ifmgd->auth_data) 4764 ieee80211_destroy_auth_data(sdata, false); 4765 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4766 IEEE80211_DEAUTH_FRAME_LEN, 4767 false); 4768 } 4769 4770 /* This is a bit of a hack - we should find a better and more generic 4771 * solution to this. Normally when suspending, cfg80211 will in fact 4772 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4773 * auth (not so important) or assoc (this is the problem) process. 4774 * 4775 * As a consequence, it can happen that we are in the process of both 4776 * associating and suspending, and receive an association response 4777 * after cfg80211 has checked if it needs to disconnect, but before 4778 * we actually set the flag to drop incoming frames. This will then 4779 * cause the workqueue flush to process the association response in 4780 * the suspend, resulting in a successful association just before it 4781 * tries to remove the interface from the driver, which now though 4782 * has a channel context assigned ... this results in issues. 4783 * 4784 * To work around this (for now) simply deauth here again if we're 4785 * now connected. 4786 */ 4787 if (ifmgd->associated && !sdata->local->wowlan) { 4788 u8 bssid[ETH_ALEN]; 4789 struct cfg80211_deauth_request req = { 4790 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4791 .bssid = bssid, 4792 }; 4793 4794 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4795 ieee80211_mgd_deauth(sdata, &req); 4796 } 4797 4798 sdata_unlock(sdata); 4799 } 4800 4801 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4802 { 4803 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4804 4805 sdata_lock(sdata); 4806 if (!ifmgd->associated) { 4807 sdata_unlock(sdata); 4808 return; 4809 } 4810 4811 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4812 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4813 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4814 ieee80211_sta_connection_lost(sdata, 4815 ifmgd->associated->bssid, 4816 WLAN_REASON_UNSPECIFIED, 4817 true); 4818 sdata_unlock(sdata); 4819 return; 4820 } 4821 sdata_unlock(sdata); 4822 } 4823 #endif 4824 4825 /* interface setup */ 4826 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4827 { 4828 struct ieee80211_if_managed *ifmgd; 4829 4830 ifmgd = &sdata->u.mgd; 4831 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4832 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4833 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4834 ieee80211_beacon_connection_loss_work); 4835 INIT_WORK(&ifmgd->csa_connection_drop_work, 4836 ieee80211_csa_connection_drop_work); 4837 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4838 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4839 ieee80211_tdls_peer_del_work); 4840 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4841 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4842 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4843 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4844 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4845 ieee80211_sta_handle_tspec_ac_params_wk); 4846 4847 ifmgd->flags = 0; 4848 ifmgd->powersave = sdata->wdev.ps; 4849 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4850 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4851 ifmgd->p2p_noa_index = -1; 4852 4853 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4854 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4855 else 4856 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4857 4858 /* Setup TDLS data */ 4859 spin_lock_init(&ifmgd->teardown_lock); 4860 ifmgd->teardown_skb = NULL; 4861 ifmgd->orig_teardown_skb = NULL; 4862 } 4863 4864 /* scan finished notification */ 4865 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4866 { 4867 struct ieee80211_sub_if_data *sdata; 4868 4869 /* Restart STA timers */ 4870 rcu_read_lock(); 4871 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4872 if (ieee80211_sdata_running(sdata)) 4873 ieee80211_restart_sta_timer(sdata); 4874 } 4875 rcu_read_unlock(); 4876 } 4877 4878 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4879 struct cfg80211_bss *cbss) 4880 { 4881 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4882 const u8 *ht_cap_ie, *vht_cap_ie; 4883 const struct ieee80211_ht_cap *ht_cap; 4884 const struct ieee80211_vht_cap *vht_cap; 4885 u8 chains = 1; 4886 4887 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4888 return chains; 4889 4890 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4891 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4892 ht_cap = (void *)(ht_cap_ie + 2); 4893 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4894 /* 4895 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4896 * "Tx Unequal Modulation Supported" fields. 4897 */ 4898 } 4899 4900 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4901 return chains; 4902 4903 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4904 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4905 u8 nss; 4906 u16 tx_mcs_map; 4907 4908 vht_cap = (void *)(vht_cap_ie + 2); 4909 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4910 for (nss = 8; nss > 0; nss--) { 4911 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4912 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4913 break; 4914 } 4915 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4916 chains = max(chains, nss); 4917 } 4918 4919 return chains; 4920 } 4921 4922 static bool 4923 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4924 const struct ieee80211_he_operation *he_op) 4925 { 4926 const struct ieee80211_sta_he_cap *sta_he_cap = 4927 ieee80211_get_he_sta_cap(sband); 4928 u16 ap_min_req_set; 4929 int i; 4930 4931 if (!sta_he_cap || !he_op) 4932 return false; 4933 4934 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4935 4936 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4937 for (i = 0; i < 3; i++) { 4938 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4939 &sta_he_cap->he_mcs_nss_supp; 4940 u16 sta_mcs_map_rx = 4941 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4942 u16 sta_mcs_map_tx = 4943 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4944 u8 nss; 4945 bool verified = true; 4946 4947 /* 4948 * For each band there is a maximum of 8 spatial streams 4949 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4950 * of 2 bits per NSS (1-8), with the values defined in enum 4951 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4952 * capabilities aren't less than the AP's minimum requirements 4953 * for this HE BSS per SS. 4954 * It is enough to find one such band that meets the reqs. 4955 */ 4956 for (nss = 8; nss > 0; nss--) { 4957 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4958 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4959 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4960 4961 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4962 continue; 4963 4964 /* 4965 * Make sure the HE AP doesn't require MCSs that aren't 4966 * supported by the client 4967 */ 4968 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4969 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4970 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4971 verified = false; 4972 break; 4973 } 4974 } 4975 4976 if (verified) 4977 return true; 4978 } 4979 4980 /* If here, STA doesn't meet AP's HE min requirements */ 4981 return false; 4982 } 4983 4984 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4985 struct cfg80211_bss *cbss) 4986 { 4987 struct ieee80211_local *local = sdata->local; 4988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4989 const struct ieee80211_ht_cap *ht_cap = NULL; 4990 const struct ieee80211_ht_operation *ht_oper = NULL; 4991 const struct ieee80211_vht_operation *vht_oper = NULL; 4992 const struct ieee80211_he_operation *he_oper = NULL; 4993 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4994 struct ieee80211_supported_band *sband; 4995 struct cfg80211_chan_def chandef; 4996 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4997 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4998 struct ieee80211_bss *bss = (void *)cbss->priv; 4999 int ret; 5000 u32 i; 5001 bool have_80mhz; 5002 5003 sband = local->hw.wiphy->bands[cbss->channel->band]; 5004 5005 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5006 IEEE80211_STA_DISABLE_80P80MHZ | 5007 IEEE80211_STA_DISABLE_160MHZ); 5008 5009 /* disable HT/VHT/HE if we don't support them */ 5010 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5011 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5012 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5013 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5014 } 5015 5016 if (!sband->vht_cap.vht_supported && is_5ghz) { 5017 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5018 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5019 } 5020 5021 if (!ieee80211_get_he_sta_cap(sband)) 5022 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5023 5024 rcu_read_lock(); 5025 5026 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5027 const u8 *ht_oper_ie, *ht_cap_ie; 5028 5029 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 5030 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 5031 ht_oper = (void *)(ht_oper_ie + 2); 5032 5033 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 5034 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 5035 ht_cap = (void *)(ht_cap_ie + 2); 5036 5037 if (!ht_cap) { 5038 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5039 ht_oper = NULL; 5040 } 5041 } 5042 5043 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5044 const u8 *vht_oper_ie, *vht_cap; 5045 5046 vht_oper_ie = ieee80211_bss_get_ie(cbss, 5047 WLAN_EID_VHT_OPERATION); 5048 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 5049 vht_oper = (void *)(vht_oper_ie + 2); 5050 if (vht_oper && !ht_oper) { 5051 vht_oper = NULL; 5052 sdata_info(sdata, 5053 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5054 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5055 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5056 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5057 } 5058 5059 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 5060 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 5061 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5062 vht_oper = NULL; 5063 } 5064 } 5065 5066 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5067 const struct cfg80211_bss_ies *ies; 5068 const u8 *he_oper_ie; 5069 5070 ies = rcu_dereference(cbss->ies); 5071 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 5072 ies->data, ies->len); 5073 if (he_oper_ie && 5074 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 5075 he_oper = (void *)(he_oper_ie + 3); 5076 else 5077 he_oper = NULL; 5078 5079 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 5080 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5081 } 5082 5083 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5084 have_80mhz = false; 5085 for (i = 0; i < sband->n_channels; i++) { 5086 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5087 IEEE80211_CHAN_NO_80MHZ)) 5088 continue; 5089 5090 have_80mhz = true; 5091 break; 5092 } 5093 5094 if (!have_80mhz) 5095 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5096 5097 if (sband->band == NL80211_BAND_S1GHZ) { 5098 const u8 *s1g_oper_ie; 5099 5100 s1g_oper_ie = ieee80211_bss_get_ie(cbss, 5101 WLAN_EID_S1G_OPERATION); 5102 if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper)) 5103 s1g_oper = (void *)(s1g_oper_ie + 2); 5104 else 5105 sdata_info(sdata, 5106 "AP missing S1G operation element?\n"); 5107 } 5108 5109 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5110 cbss->channel, 5111 bss->vht_cap_info, 5112 ht_oper, vht_oper, he_oper, 5113 s1g_oper, 5114 &chandef, false); 5115 5116 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5117 local->rx_chains); 5118 5119 rcu_read_unlock(); 5120 5121 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5122 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5123 return -EINVAL; 5124 } 5125 5126 /* will change later if needed */ 5127 sdata->smps_mode = IEEE80211_SMPS_OFF; 5128 5129 mutex_lock(&local->mtx); 5130 /* 5131 * If this fails (possibly due to channel context sharing 5132 * on incompatible channels, e.g. 80+80 and 160 sharing the 5133 * same control channel) try to use a smaller bandwidth. 5134 */ 5135 ret = ieee80211_vif_use_channel(sdata, &chandef, 5136 IEEE80211_CHANCTX_SHARED); 5137 5138 /* don't downgrade for 5 and 10 MHz channels, though. */ 5139 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5140 chandef.width == NL80211_CHAN_WIDTH_10) 5141 goto out; 5142 5143 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5144 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5145 ret = ieee80211_vif_use_channel(sdata, &chandef, 5146 IEEE80211_CHANCTX_SHARED); 5147 } 5148 out: 5149 mutex_unlock(&local->mtx); 5150 return ret; 5151 } 5152 5153 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5154 u8 *dtim_count, u8 *dtim_period) 5155 { 5156 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5157 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5158 ies->len); 5159 const struct ieee80211_tim_ie *tim = NULL; 5160 const struct ieee80211_bssid_index *idx; 5161 bool valid = tim_ie && tim_ie[1] >= 2; 5162 5163 if (valid) 5164 tim = (void *)(tim_ie + 2); 5165 5166 if (dtim_count) 5167 *dtim_count = valid ? tim->dtim_count : 0; 5168 5169 if (dtim_period) 5170 *dtim_period = valid ? tim->dtim_period : 0; 5171 5172 /* Check if value is overridden by non-transmitted profile */ 5173 if (!idx_ie || idx_ie[1] < 3) 5174 return valid; 5175 5176 idx = (void *)(idx_ie + 2); 5177 5178 if (dtim_count) 5179 *dtim_count = idx->dtim_count; 5180 5181 if (dtim_period) 5182 *dtim_period = idx->dtim_period; 5183 5184 return true; 5185 } 5186 5187 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5188 struct cfg80211_bss *cbss, bool assoc, 5189 bool override) 5190 { 5191 struct ieee80211_local *local = sdata->local; 5192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5193 struct ieee80211_bss *bss = (void *)cbss->priv; 5194 struct sta_info *new_sta = NULL; 5195 struct ieee80211_supported_band *sband; 5196 bool have_sta = false; 5197 int err; 5198 5199 sband = local->hw.wiphy->bands[cbss->channel->band]; 5200 5201 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5202 return -EINVAL; 5203 5204 /* If a reconfig is happening, bail out */ 5205 if (local->in_reconfig) 5206 return -EBUSY; 5207 5208 if (assoc) { 5209 rcu_read_lock(); 5210 have_sta = sta_info_get(sdata, cbss->bssid); 5211 rcu_read_unlock(); 5212 } 5213 5214 if (!have_sta) { 5215 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5216 if (!new_sta) 5217 return -ENOMEM; 5218 } 5219 5220 /* 5221 * Set up the information for the new channel before setting the 5222 * new channel. We can't - completely race-free - change the basic 5223 * rates bitmap and the channel (sband) that it refers to, but if 5224 * we set it up before we at least avoid calling into the driver's 5225 * bss_info_changed() method with invalid information (since we do 5226 * call that from changing the channel - only for IDLE and perhaps 5227 * some others, but ...). 5228 * 5229 * So to avoid that, just set up all the new information before the 5230 * channel, but tell the driver to apply it only afterwards, since 5231 * it might need the new channel for that. 5232 */ 5233 if (new_sta) { 5234 u32 rates = 0, basic_rates = 0; 5235 bool have_higher_than_11mbit; 5236 int min_rate = INT_MAX, min_rate_index = -1; 5237 const struct cfg80211_bss_ies *ies; 5238 int shift = ieee80211_vif_get_shift(&sdata->vif); 5239 5240 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5241 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5242 ieee80211_s1g_sta_rate_init(new_sta); 5243 goto skip_rates; 5244 } 5245 5246 ieee80211_get_rates(sband, bss->supp_rates, 5247 bss->supp_rates_len, 5248 &rates, &basic_rates, 5249 &have_higher_than_11mbit, 5250 &min_rate, &min_rate_index, 5251 shift); 5252 5253 /* 5254 * This used to be a workaround for basic rates missing 5255 * in the association response frame. Now that we no 5256 * longer use the basic rates from there, it probably 5257 * doesn't happen any more, but keep the workaround so 5258 * in case some *other* APs are buggy in different ways 5259 * we can connect -- with a warning. 5260 * Allow this workaround only in case the AP provided at least 5261 * one rate. 5262 */ 5263 if (min_rate_index < 0) { 5264 sdata_info(sdata, 5265 "No legacy rates in association response\n"); 5266 5267 sta_info_free(local, new_sta); 5268 return -EINVAL; 5269 } else if (!basic_rates) { 5270 sdata_info(sdata, 5271 "No basic rates, using min rate instead\n"); 5272 basic_rates = BIT(min_rate_index); 5273 } 5274 5275 if (rates) 5276 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5277 else 5278 sdata_info(sdata, 5279 "No rates found, keeping mandatory only\n"); 5280 5281 sdata->vif.bss_conf.basic_rates = basic_rates; 5282 5283 /* cf. IEEE 802.11 9.2.12 */ 5284 if (cbss->channel->band == NL80211_BAND_2GHZ && 5285 have_higher_than_11mbit) 5286 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5287 else 5288 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5289 5290 skip_rates: 5291 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5292 5293 /* set timing information */ 5294 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5295 rcu_read_lock(); 5296 ies = rcu_dereference(cbss->beacon_ies); 5297 if (ies) { 5298 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5299 sdata->vif.bss_conf.sync_device_ts = 5300 bss->device_ts_beacon; 5301 5302 ieee80211_get_dtim(ies, 5303 &sdata->vif.bss_conf.sync_dtim_count, 5304 NULL); 5305 } else if (!ieee80211_hw_check(&sdata->local->hw, 5306 TIMING_BEACON_ONLY)) { 5307 ies = rcu_dereference(cbss->proberesp_ies); 5308 /* must be non-NULL since beacon IEs were NULL */ 5309 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5310 sdata->vif.bss_conf.sync_device_ts = 5311 bss->device_ts_presp; 5312 sdata->vif.bss_conf.sync_dtim_count = 0; 5313 } else { 5314 sdata->vif.bss_conf.sync_tsf = 0; 5315 sdata->vif.bss_conf.sync_device_ts = 0; 5316 sdata->vif.bss_conf.sync_dtim_count = 0; 5317 } 5318 rcu_read_unlock(); 5319 } 5320 5321 if (new_sta || override) { 5322 err = ieee80211_prep_channel(sdata, cbss); 5323 if (err) { 5324 if (new_sta) 5325 sta_info_free(local, new_sta); 5326 return -EINVAL; 5327 } 5328 } 5329 5330 if (new_sta) { 5331 /* 5332 * tell driver about BSSID, basic rates and timing 5333 * this was set up above, before setting the channel 5334 */ 5335 ieee80211_bss_info_change_notify(sdata, 5336 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5337 BSS_CHANGED_BEACON_INT); 5338 5339 if (assoc) 5340 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5341 5342 err = sta_info_insert(new_sta); 5343 new_sta = NULL; 5344 if (err) { 5345 sdata_info(sdata, 5346 "failed to insert STA entry for the AP (error %d)\n", 5347 err); 5348 return err; 5349 } 5350 } else 5351 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5352 5353 /* Cancel scan to ensure that nothing interferes with connection */ 5354 if (local->scanning) 5355 ieee80211_scan_cancel(local); 5356 5357 return 0; 5358 } 5359 5360 /* config hooks */ 5361 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5362 struct cfg80211_auth_request *req) 5363 { 5364 struct ieee80211_local *local = sdata->local; 5365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5366 struct ieee80211_mgd_auth_data *auth_data; 5367 u16 auth_alg; 5368 int err; 5369 bool cont_auth; 5370 5371 /* prepare auth data structure */ 5372 5373 switch (req->auth_type) { 5374 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5375 auth_alg = WLAN_AUTH_OPEN; 5376 break; 5377 case NL80211_AUTHTYPE_SHARED_KEY: 5378 if (fips_enabled) 5379 return -EOPNOTSUPP; 5380 auth_alg = WLAN_AUTH_SHARED_KEY; 5381 break; 5382 case NL80211_AUTHTYPE_FT: 5383 auth_alg = WLAN_AUTH_FT; 5384 break; 5385 case NL80211_AUTHTYPE_NETWORK_EAP: 5386 auth_alg = WLAN_AUTH_LEAP; 5387 break; 5388 case NL80211_AUTHTYPE_SAE: 5389 auth_alg = WLAN_AUTH_SAE; 5390 break; 5391 case NL80211_AUTHTYPE_FILS_SK: 5392 auth_alg = WLAN_AUTH_FILS_SK; 5393 break; 5394 case NL80211_AUTHTYPE_FILS_SK_PFS: 5395 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5396 break; 5397 case NL80211_AUTHTYPE_FILS_PK: 5398 auth_alg = WLAN_AUTH_FILS_PK; 5399 break; 5400 default: 5401 return -EOPNOTSUPP; 5402 } 5403 5404 if (ifmgd->assoc_data) 5405 return -EBUSY; 5406 5407 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5408 req->ie_len, GFP_KERNEL); 5409 if (!auth_data) 5410 return -ENOMEM; 5411 5412 auth_data->bss = req->bss; 5413 5414 if (req->auth_data_len >= 4) { 5415 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5416 __le16 *pos = (__le16 *) req->auth_data; 5417 5418 auth_data->sae_trans = le16_to_cpu(pos[0]); 5419 auth_data->sae_status = le16_to_cpu(pos[1]); 5420 } 5421 memcpy(auth_data->data, req->auth_data + 4, 5422 req->auth_data_len - 4); 5423 auth_data->data_len += req->auth_data_len - 4; 5424 } 5425 5426 /* Check if continuing authentication or trying to authenticate with the 5427 * same BSS that we were in the process of authenticating with and avoid 5428 * removal and re-addition of the STA entry in 5429 * ieee80211_prep_connection(). 5430 */ 5431 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5432 5433 if (req->ie && req->ie_len) { 5434 memcpy(&auth_data->data[auth_data->data_len], 5435 req->ie, req->ie_len); 5436 auth_data->data_len += req->ie_len; 5437 } 5438 5439 if (req->key && req->key_len) { 5440 auth_data->key_len = req->key_len; 5441 auth_data->key_idx = req->key_idx; 5442 memcpy(auth_data->key, req->key, req->key_len); 5443 } 5444 5445 auth_data->algorithm = auth_alg; 5446 5447 /* try to authenticate/probe */ 5448 5449 if (ifmgd->auth_data) { 5450 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5451 auth_data->peer_confirmed = 5452 ifmgd->auth_data->peer_confirmed; 5453 } 5454 ieee80211_destroy_auth_data(sdata, cont_auth); 5455 } 5456 5457 /* prep auth_data so we don't go into idle on disassoc */ 5458 ifmgd->auth_data = auth_data; 5459 5460 /* If this is continuation of an ongoing SAE authentication exchange 5461 * (i.e., request to send SAE Confirm) and the peer has already 5462 * confirmed, mark authentication completed since we are about to send 5463 * out SAE Confirm. 5464 */ 5465 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5466 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5467 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5468 5469 if (ifmgd->associated) { 5470 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5471 5472 sdata_info(sdata, 5473 "disconnect from AP %pM for new auth to %pM\n", 5474 ifmgd->associated->bssid, req->bss->bssid); 5475 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5476 WLAN_REASON_UNSPECIFIED, 5477 false, frame_buf); 5478 5479 ieee80211_report_disconnect(sdata, frame_buf, 5480 sizeof(frame_buf), true, 5481 WLAN_REASON_UNSPECIFIED, 5482 false); 5483 } 5484 5485 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5486 5487 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5488 if (err) 5489 goto err_clear; 5490 5491 err = ieee80211_auth(sdata); 5492 if (err) { 5493 sta_info_destroy_addr(sdata, req->bss->bssid); 5494 goto err_clear; 5495 } 5496 5497 /* hold our own reference */ 5498 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5499 return 0; 5500 5501 err_clear: 5502 eth_zero_addr(ifmgd->bssid); 5503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5504 ifmgd->auth_data = NULL; 5505 mutex_lock(&sdata->local->mtx); 5506 ieee80211_vif_release_channel(sdata); 5507 mutex_unlock(&sdata->local->mtx); 5508 kfree(auth_data); 5509 return err; 5510 } 5511 5512 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5513 struct cfg80211_assoc_request *req) 5514 { 5515 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5516 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5517 struct ieee80211_local *local = sdata->local; 5518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5519 struct ieee80211_bss *bss = (void *)req->bss->priv; 5520 struct ieee80211_mgd_assoc_data *assoc_data; 5521 const struct cfg80211_bss_ies *beacon_ies; 5522 struct ieee80211_supported_band *sband; 5523 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5524 const u8 *ssidie, *ht_ie, *vht_ie; 5525 int i, err; 5526 bool override = false; 5527 5528 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5529 if (!assoc_data) 5530 return -ENOMEM; 5531 5532 rcu_read_lock(); 5533 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5534 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5535 rcu_read_unlock(); 5536 kfree(assoc_data); 5537 return -EINVAL; 5538 } 5539 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5540 assoc_data->ssid_len = ssidie[1]; 5541 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5542 bss_conf->ssid_len = assoc_data->ssid_len; 5543 rcu_read_unlock(); 5544 5545 if (ifmgd->associated) { 5546 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5547 5548 sdata_info(sdata, 5549 "disconnect from AP %pM for new assoc to %pM\n", 5550 ifmgd->associated->bssid, req->bss->bssid); 5551 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5552 WLAN_REASON_UNSPECIFIED, 5553 false, frame_buf); 5554 5555 ieee80211_report_disconnect(sdata, frame_buf, 5556 sizeof(frame_buf), true, 5557 WLAN_REASON_UNSPECIFIED, 5558 false); 5559 } 5560 5561 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5562 err = -EBUSY; 5563 goto err_free; 5564 } 5565 5566 if (ifmgd->assoc_data) { 5567 err = -EBUSY; 5568 goto err_free; 5569 } 5570 5571 if (ifmgd->auth_data) { 5572 bool match; 5573 5574 /* keep sta info, bssid if matching */ 5575 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5576 ieee80211_destroy_auth_data(sdata, match); 5577 } 5578 5579 /* prepare assoc data */ 5580 5581 ifmgd->beacon_crc_valid = false; 5582 5583 assoc_data->wmm = bss->wmm_used && 5584 (local->hw.queues >= IEEE80211_NUM_ACS); 5585 5586 /* 5587 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5588 * We still associate in non-HT mode (11a/b/g) if any one of these 5589 * ciphers is configured as pairwise. 5590 * We can set this to true for non-11n hardware, that'll be checked 5591 * separately along with the peer capabilities. 5592 */ 5593 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5594 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5595 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5596 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5597 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5599 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5600 netdev_info(sdata->dev, 5601 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5602 } 5603 } 5604 5605 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5606 5607 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5608 if (!bss->wmm_used) { 5609 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5610 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5611 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5612 netdev_info(sdata->dev, 5613 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5614 } 5615 5616 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5617 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5618 sizeof(ifmgd->ht_capa_mask)); 5619 5620 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5621 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5622 sizeof(ifmgd->vht_capa_mask)); 5623 5624 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5625 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5626 sizeof(ifmgd->s1g_capa_mask)); 5627 5628 if (req->ie && req->ie_len) { 5629 memcpy(assoc_data->ie, req->ie, req->ie_len); 5630 assoc_data->ie_len = req->ie_len; 5631 } 5632 5633 if (req->fils_kek) { 5634 /* should already be checked in cfg80211 - so warn */ 5635 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5636 err = -EINVAL; 5637 goto err_free; 5638 } 5639 memcpy(assoc_data->fils_kek, req->fils_kek, 5640 req->fils_kek_len); 5641 assoc_data->fils_kek_len = req->fils_kek_len; 5642 } 5643 5644 if (req->fils_nonces) 5645 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5646 2 * FILS_NONCE_LEN); 5647 5648 assoc_data->bss = req->bss; 5649 5650 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5651 if (ifmgd->powersave) 5652 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5653 else 5654 sdata->smps_mode = IEEE80211_SMPS_OFF; 5655 } else 5656 sdata->smps_mode = ifmgd->req_smps; 5657 5658 assoc_data->capability = req->bss->capability; 5659 assoc_data->supp_rates = bss->supp_rates; 5660 assoc_data->supp_rates_len = bss->supp_rates_len; 5661 5662 rcu_read_lock(); 5663 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5664 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5665 assoc_data->ap_ht_param = 5666 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5667 else if (!is_6ghz) 5668 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5669 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5670 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5671 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5672 sizeof(struct ieee80211_vht_cap)); 5673 else if (is_5ghz) 5674 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5675 IEEE80211_STA_DISABLE_HE; 5676 rcu_read_unlock(); 5677 5678 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5679 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5680 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5681 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5682 5683 if (bss->wmm_used && bss->uapsd_supported && 5684 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5685 assoc_data->uapsd = true; 5686 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5687 } else { 5688 assoc_data->uapsd = false; 5689 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5690 } 5691 5692 if (req->prev_bssid) 5693 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5694 5695 if (req->use_mfp) { 5696 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5697 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5698 } else { 5699 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5700 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5701 } 5702 5703 if (req->flags & ASSOC_REQ_USE_RRM) 5704 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5705 else 5706 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5707 5708 if (req->crypto.control_port) 5709 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5710 else 5711 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5712 5713 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5714 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5715 sdata->control_port_over_nl80211 = 5716 req->crypto.control_port_over_nl80211; 5717 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5718 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5719 sdata->vif.type); 5720 5721 /* kick off associate process */ 5722 5723 ifmgd->assoc_data = assoc_data; 5724 ifmgd->dtim_period = 0; 5725 ifmgd->have_beacon = false; 5726 5727 /* override HT/VHT configuration only if the AP and we support it */ 5728 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5729 struct ieee80211_sta_ht_cap sta_ht_cap; 5730 5731 if (req->flags & ASSOC_REQ_DISABLE_HT) 5732 override = true; 5733 5734 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5735 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5736 5737 /* check for 40 MHz disable override */ 5738 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5739 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5740 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5741 override = true; 5742 5743 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5744 req->flags & ASSOC_REQ_DISABLE_VHT) 5745 override = true; 5746 } 5747 5748 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5749 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5750 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5751 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5752 } 5753 5754 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5755 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5756 5757 if (req->flags & ASSOC_REQ_DISABLE_HE) 5758 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5759 5760 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5761 if (err) 5762 goto err_clear; 5763 5764 rcu_read_lock(); 5765 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5766 5767 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5768 !beacon_ies) { 5769 /* 5770 * Wait up to one beacon interval ... 5771 * should this be more if we miss one? 5772 */ 5773 sdata_info(sdata, "waiting for beacon from %pM\n", 5774 ifmgd->bssid); 5775 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5776 assoc_data->timeout_started = true; 5777 assoc_data->need_beacon = true; 5778 } else if (beacon_ies) { 5779 const struct element *elem; 5780 u8 dtim_count = 0; 5781 5782 ieee80211_get_dtim(beacon_ies, &dtim_count, 5783 &ifmgd->dtim_period); 5784 5785 ifmgd->have_beacon = true; 5786 assoc_data->timeout = jiffies; 5787 assoc_data->timeout_started = true; 5788 5789 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5790 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5791 sdata->vif.bss_conf.sync_device_ts = 5792 bss->device_ts_beacon; 5793 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5794 } 5795 5796 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5797 beacon_ies->data, beacon_ies->len); 5798 if (elem && elem->datalen >= 3) 5799 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5800 5801 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5802 beacon_ies->data, beacon_ies->len); 5803 if (elem && elem->datalen >= 11 && 5804 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5805 sdata->vif.bss_conf.ema_ap = true; 5806 } else { 5807 assoc_data->timeout = jiffies; 5808 assoc_data->timeout_started = true; 5809 } 5810 rcu_read_unlock(); 5811 5812 run_again(sdata, assoc_data->timeout); 5813 5814 if (bss->corrupt_data) { 5815 char *corrupt_type = "data"; 5816 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5817 if (bss->corrupt_data & 5818 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5819 corrupt_type = "beacon and probe response"; 5820 else 5821 corrupt_type = "beacon"; 5822 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5823 corrupt_type = "probe response"; 5824 sdata_info(sdata, "associating with AP with corrupt %s\n", 5825 corrupt_type); 5826 } 5827 5828 return 0; 5829 err_clear: 5830 eth_zero_addr(ifmgd->bssid); 5831 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5832 ifmgd->assoc_data = NULL; 5833 err_free: 5834 kfree(assoc_data); 5835 return err; 5836 } 5837 5838 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5839 struct cfg80211_deauth_request *req) 5840 { 5841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5842 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5843 bool tx = !req->local_state_change; 5844 5845 if (ifmgd->auth_data && 5846 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5847 sdata_info(sdata, 5848 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5849 req->bssid, req->reason_code, 5850 ieee80211_get_reason_code_string(req->reason_code)); 5851 5852 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5853 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5854 IEEE80211_STYPE_DEAUTH, 5855 req->reason_code, tx, 5856 frame_buf); 5857 ieee80211_destroy_auth_data(sdata, false); 5858 ieee80211_report_disconnect(sdata, frame_buf, 5859 sizeof(frame_buf), true, 5860 req->reason_code, false); 5861 5862 return 0; 5863 } 5864 5865 if (ifmgd->assoc_data && 5866 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5867 sdata_info(sdata, 5868 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5869 req->bssid, req->reason_code, 5870 ieee80211_get_reason_code_string(req->reason_code)); 5871 5872 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5873 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5874 IEEE80211_STYPE_DEAUTH, 5875 req->reason_code, tx, 5876 frame_buf); 5877 ieee80211_destroy_assoc_data(sdata, false, true); 5878 ieee80211_report_disconnect(sdata, frame_buf, 5879 sizeof(frame_buf), true, 5880 req->reason_code, false); 5881 return 0; 5882 } 5883 5884 if (ifmgd->associated && 5885 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5886 sdata_info(sdata, 5887 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5888 req->bssid, req->reason_code, 5889 ieee80211_get_reason_code_string(req->reason_code)); 5890 5891 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5892 req->reason_code, tx, frame_buf); 5893 ieee80211_report_disconnect(sdata, frame_buf, 5894 sizeof(frame_buf), true, 5895 req->reason_code, false); 5896 return 0; 5897 } 5898 5899 return -ENOTCONN; 5900 } 5901 5902 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5903 struct cfg80211_disassoc_request *req) 5904 { 5905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5906 u8 bssid[ETH_ALEN]; 5907 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5908 5909 /* 5910 * cfg80211 should catch this ... but it's racy since 5911 * we can receive a disassoc frame, process it, hand it 5912 * to cfg80211 while that's in a locked section already 5913 * trying to tell us that the user wants to disconnect. 5914 */ 5915 if (ifmgd->associated != req->bss) 5916 return -ENOLINK; 5917 5918 sdata_info(sdata, 5919 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5920 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5921 5922 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5923 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5924 req->reason_code, !req->local_state_change, 5925 frame_buf); 5926 5927 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5928 req->reason_code, false); 5929 5930 return 0; 5931 } 5932 5933 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5934 { 5935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5936 5937 /* 5938 * Make sure some work items will not run after this, 5939 * they will not do anything but might not have been 5940 * cancelled when disconnecting. 5941 */ 5942 cancel_work_sync(&ifmgd->monitor_work); 5943 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5944 cancel_work_sync(&ifmgd->request_smps_work); 5945 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5946 cancel_work_sync(&ifmgd->chswitch_work); 5947 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5948 5949 sdata_lock(sdata); 5950 if (ifmgd->assoc_data) { 5951 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5952 ieee80211_destroy_assoc_data(sdata, false, false); 5953 cfg80211_assoc_timeout(sdata->dev, bss); 5954 } 5955 if (ifmgd->auth_data) 5956 ieee80211_destroy_auth_data(sdata, false); 5957 spin_lock_bh(&ifmgd->teardown_lock); 5958 if (ifmgd->teardown_skb) { 5959 kfree_skb(ifmgd->teardown_skb); 5960 ifmgd->teardown_skb = NULL; 5961 ifmgd->orig_teardown_skb = NULL; 5962 } 5963 kfree(ifmgd->assoc_req_ies); 5964 ifmgd->assoc_req_ies = NULL; 5965 ifmgd->assoc_req_ies_len = 0; 5966 spin_unlock_bh(&ifmgd->teardown_lock); 5967 del_timer_sync(&ifmgd->timer); 5968 sdata_unlock(sdata); 5969 } 5970 5971 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5972 enum nl80211_cqm_rssi_threshold_event rssi_event, 5973 s32 rssi_level, 5974 gfp_t gfp) 5975 { 5976 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5977 5978 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5979 5980 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5981 } 5982 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5983 5984 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5985 { 5986 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5987 5988 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5989 5990 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5991 } 5992 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5993