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 * If the CSA IE is still present on the beacon after the switch, 1300 * we need to consider it as a new CSA (possibly to self). 1301 */ 1302 ifmgd->beacon_crc_valid = false; 1303 1304 ret = drv_post_channel_switch(sdata); 1305 if (ret) { 1306 sdata_info(sdata, 1307 "driver post channel switch failed, disconnecting\n"); 1308 ieee80211_queue_work(&local->hw, 1309 &ifmgd->csa_connection_drop_work); 1310 return; 1311 } 1312 1313 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1314 } 1315 1316 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1317 { 1318 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1320 1321 trace_api_chswitch_done(sdata, success); 1322 if (!success) { 1323 sdata_info(sdata, 1324 "driver channel switch failed, disconnecting\n"); 1325 ieee80211_queue_work(&sdata->local->hw, 1326 &ifmgd->csa_connection_drop_work); 1327 } else { 1328 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1329 } 1330 } 1331 EXPORT_SYMBOL(ieee80211_chswitch_done); 1332 1333 static void ieee80211_chswitch_timer(struct timer_list *t) 1334 { 1335 struct ieee80211_sub_if_data *sdata = 1336 from_timer(sdata, t, u.mgd.chswitch_timer); 1337 1338 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1339 } 1340 1341 static void 1342 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1343 { 1344 struct ieee80211_local *local = sdata->local; 1345 1346 if (!local->ops->abort_channel_switch) 1347 return; 1348 1349 mutex_lock(&local->mtx); 1350 1351 mutex_lock(&local->chanctx_mtx); 1352 ieee80211_vif_unreserve_chanctx(sdata); 1353 mutex_unlock(&local->chanctx_mtx); 1354 1355 if (sdata->csa_block_tx) 1356 ieee80211_wake_vif_queues(local, sdata, 1357 IEEE80211_QUEUE_STOP_REASON_CSA); 1358 1359 sdata->csa_block_tx = false; 1360 sdata->vif.csa_active = false; 1361 1362 mutex_unlock(&local->mtx); 1363 1364 drv_abort_channel_switch(sdata); 1365 } 1366 1367 static void 1368 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1369 u64 timestamp, u32 device_timestamp, 1370 struct ieee802_11_elems *elems, 1371 bool beacon) 1372 { 1373 struct ieee80211_local *local = sdata->local; 1374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1375 struct cfg80211_bss *cbss = ifmgd->associated; 1376 struct ieee80211_chanctx_conf *conf; 1377 struct ieee80211_chanctx *chanctx; 1378 enum nl80211_band current_band; 1379 struct ieee80211_csa_ie csa_ie; 1380 struct ieee80211_channel_switch ch_switch; 1381 struct ieee80211_bss *bss; 1382 int res; 1383 1384 sdata_assert_lock(sdata); 1385 1386 if (!cbss) 1387 return; 1388 1389 if (local->scanning) 1390 return; 1391 1392 current_band = cbss->channel->band; 1393 bss = (void *)cbss->priv; 1394 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1395 bss->vht_cap_info, 1396 ifmgd->flags, 1397 ifmgd->associated->bssid, &csa_ie); 1398 1399 if (!res) { 1400 ch_switch.timestamp = timestamp; 1401 ch_switch.device_timestamp = device_timestamp; 1402 ch_switch.block_tx = csa_ie.mode; 1403 ch_switch.chandef = csa_ie.chandef; 1404 ch_switch.count = csa_ie.count; 1405 ch_switch.delay = csa_ie.max_switch_time; 1406 } 1407 1408 if (res < 0) 1409 goto lock_and_drop_connection; 1410 1411 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1412 if (res) 1413 ieee80211_sta_abort_chanswitch(sdata); 1414 else 1415 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1416 return; 1417 } else if (sdata->vif.csa_active || res) { 1418 /* disregard subsequent announcements if already processing */ 1419 return; 1420 } 1421 1422 if (sdata->vif.bss_conf.chandef.chan->band != 1423 csa_ie.chandef.chan->band) { 1424 sdata_info(sdata, 1425 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1426 ifmgd->associated->bssid, 1427 csa_ie.chandef.chan->center_freq, 1428 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1429 csa_ie.chandef.center_freq2); 1430 goto lock_and_drop_connection; 1431 } 1432 1433 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1434 IEEE80211_CHAN_DISABLED)) { 1435 sdata_info(sdata, 1436 "AP %pM switches to unsupported channel " 1437 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1438 "disconnecting\n", 1439 ifmgd->associated->bssid, 1440 csa_ie.chandef.chan->center_freq, 1441 csa_ie.chandef.chan->freq_offset, 1442 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1443 csa_ie.chandef.freq1_offset, 1444 csa_ie.chandef.center_freq2); 1445 goto lock_and_drop_connection; 1446 } 1447 1448 if (cfg80211_chandef_identical(&csa_ie.chandef, 1449 &sdata->vif.bss_conf.chandef) && 1450 (!csa_ie.mode || !beacon)) { 1451 if (ifmgd->csa_ignored_same_chan) 1452 return; 1453 sdata_info(sdata, 1454 "AP %pM tries to chanswitch to same channel, ignore\n", 1455 ifmgd->associated->bssid); 1456 ifmgd->csa_ignored_same_chan = true; 1457 return; 1458 } 1459 1460 /* 1461 * Drop all TDLS peers - either we disconnect or move to a different 1462 * channel from this point on. There's no telling what our peer will do. 1463 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1464 * have an incompatible wider chandef. 1465 */ 1466 ieee80211_teardown_tdls_peers(sdata); 1467 1468 mutex_lock(&local->mtx); 1469 mutex_lock(&local->chanctx_mtx); 1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1471 lockdep_is_held(&local->chanctx_mtx)); 1472 if (!conf) { 1473 sdata_info(sdata, 1474 "no channel context assigned to vif?, disconnecting\n"); 1475 goto drop_connection; 1476 } 1477 1478 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1479 1480 if (local->use_chanctx && 1481 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1482 sdata_info(sdata, 1483 "driver doesn't support chan-switch with channel contexts\n"); 1484 goto drop_connection; 1485 } 1486 1487 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1488 sdata_info(sdata, 1489 "preparing for channel switch failed, disconnecting\n"); 1490 goto drop_connection; 1491 } 1492 1493 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1494 chanctx->mode, false); 1495 if (res) { 1496 sdata_info(sdata, 1497 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1498 res); 1499 goto drop_connection; 1500 } 1501 mutex_unlock(&local->chanctx_mtx); 1502 1503 sdata->vif.csa_active = true; 1504 sdata->csa_chandef = csa_ie.chandef; 1505 sdata->csa_block_tx = csa_ie.mode; 1506 ifmgd->csa_ignored_same_chan = false; 1507 ifmgd->beacon_crc_valid = false; 1508 1509 if (sdata->csa_block_tx) 1510 ieee80211_stop_vif_queues(local, sdata, 1511 IEEE80211_QUEUE_STOP_REASON_CSA); 1512 mutex_unlock(&local->mtx); 1513 1514 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1515 csa_ie.count, csa_ie.mode); 1516 1517 if (local->ops->channel_switch) { 1518 /* use driver's channel switch callback */ 1519 drv_channel_switch(local, sdata, &ch_switch); 1520 return; 1521 } 1522 1523 /* channel switch handled in software */ 1524 if (csa_ie.count <= 1) 1525 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1526 else 1527 mod_timer(&ifmgd->chswitch_timer, 1528 TU_TO_EXP_TIME((csa_ie.count - 1) * 1529 cbss->beacon_interval)); 1530 return; 1531 lock_and_drop_connection: 1532 mutex_lock(&local->mtx); 1533 mutex_lock(&local->chanctx_mtx); 1534 drop_connection: 1535 /* 1536 * This is just so that the disconnect flow will know that 1537 * we were trying to switch channel and failed. In case the 1538 * mode is 1 (we are not allowed to Tx), we will know not to 1539 * send a deauthentication frame. Those two fields will be 1540 * reset when the disconnection worker runs. 1541 */ 1542 sdata->vif.csa_active = true; 1543 sdata->csa_block_tx = csa_ie.mode; 1544 1545 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1546 mutex_unlock(&local->chanctx_mtx); 1547 mutex_unlock(&local->mtx); 1548 } 1549 1550 static bool 1551 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1552 struct ieee80211_channel *channel, 1553 const u8 *country_ie, u8 country_ie_len, 1554 const u8 *pwr_constr_elem, 1555 int *chan_pwr, int *pwr_reduction) 1556 { 1557 struct ieee80211_country_ie_triplet *triplet; 1558 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1559 int i, chan_increment; 1560 bool have_chan_pwr = false; 1561 1562 /* Invalid IE */ 1563 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1564 return false; 1565 1566 triplet = (void *)(country_ie + 3); 1567 country_ie_len -= 3; 1568 1569 switch (channel->band) { 1570 default: 1571 WARN_ON_ONCE(1); 1572 fallthrough; 1573 case NL80211_BAND_2GHZ: 1574 case NL80211_BAND_60GHZ: 1575 chan_increment = 1; 1576 break; 1577 case NL80211_BAND_5GHZ: 1578 chan_increment = 4; 1579 break; 1580 case NL80211_BAND_6GHZ: 1581 /* 1582 * In the 6 GHz band, the "maximum transmit power level" 1583 * field in the triplets is reserved, and thus will be 1584 * zero and we shouldn't use it to control TX power. 1585 * The actual TX power will be given in the transmit 1586 * power envelope element instead. 1587 */ 1588 return false; 1589 } 1590 1591 /* find channel */ 1592 while (country_ie_len >= 3) { 1593 u8 first_channel = triplet->chans.first_channel; 1594 1595 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1596 goto next; 1597 1598 for (i = 0; i < triplet->chans.num_channels; i++) { 1599 if (first_channel + i * chan_increment == chan) { 1600 have_chan_pwr = true; 1601 *chan_pwr = triplet->chans.max_power; 1602 break; 1603 } 1604 } 1605 if (have_chan_pwr) 1606 break; 1607 1608 next: 1609 triplet++; 1610 country_ie_len -= 3; 1611 } 1612 1613 if (have_chan_pwr && pwr_constr_elem) 1614 *pwr_reduction = *pwr_constr_elem; 1615 else 1616 *pwr_reduction = 0; 1617 1618 return have_chan_pwr; 1619 } 1620 1621 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1622 struct ieee80211_channel *channel, 1623 const u8 *cisco_dtpc_ie, 1624 int *pwr_level) 1625 { 1626 /* From practical testing, the first data byte of the DTPC element 1627 * seems to contain the requested dBm level, and the CLI on Cisco 1628 * APs clearly state the range is -127 to 127 dBm, which indicates 1629 * a signed byte, although it seemingly never actually goes negative. 1630 * The other byte seems to always be zero. 1631 */ 1632 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1633 } 1634 1635 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1636 struct ieee80211_channel *channel, 1637 struct ieee80211_mgmt *mgmt, 1638 const u8 *country_ie, u8 country_ie_len, 1639 const u8 *pwr_constr_ie, 1640 const u8 *cisco_dtpc_ie) 1641 { 1642 bool has_80211h_pwr = false, has_cisco_pwr = false; 1643 int chan_pwr = 0, pwr_reduction_80211h = 0; 1644 int pwr_level_cisco, pwr_level_80211h; 1645 int new_ap_level; 1646 __le16 capab = mgmt->u.probe_resp.capab_info; 1647 1648 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1649 return 0; /* TODO */ 1650 1651 if (country_ie && 1652 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1653 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1654 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1655 sdata, channel, country_ie, country_ie_len, 1656 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1657 pwr_level_80211h = 1658 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1659 } 1660 1661 if (cisco_dtpc_ie) { 1662 ieee80211_find_cisco_dtpc( 1663 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1664 has_cisco_pwr = true; 1665 } 1666 1667 if (!has_80211h_pwr && !has_cisco_pwr) 1668 return 0; 1669 1670 /* If we have both 802.11h and Cisco DTPC, apply both limits 1671 * by picking the smallest of the two power levels advertised. 1672 */ 1673 if (has_80211h_pwr && 1674 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1675 new_ap_level = pwr_level_80211h; 1676 1677 if (sdata->ap_power_level == new_ap_level) 1678 return 0; 1679 1680 sdata_dbg(sdata, 1681 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1682 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1683 sdata->u.mgd.bssid); 1684 } else { /* has_cisco_pwr is always true here. */ 1685 new_ap_level = pwr_level_cisco; 1686 1687 if (sdata->ap_power_level == new_ap_level) 1688 return 0; 1689 1690 sdata_dbg(sdata, 1691 "Limiting TX power to %d dBm as advertised by %pM\n", 1692 pwr_level_cisco, sdata->u.mgd.bssid); 1693 } 1694 1695 sdata->ap_power_level = new_ap_level; 1696 if (__ieee80211_recalc_txpower(sdata)) 1697 return BSS_CHANGED_TXPOWER; 1698 return 0; 1699 } 1700 1701 /* powersave */ 1702 static void ieee80211_enable_ps(struct ieee80211_local *local, 1703 struct ieee80211_sub_if_data *sdata) 1704 { 1705 struct ieee80211_conf *conf = &local->hw.conf; 1706 1707 /* 1708 * If we are scanning right now then the parameters will 1709 * take effect when scan finishes. 1710 */ 1711 if (local->scanning) 1712 return; 1713 1714 if (conf->dynamic_ps_timeout > 0 && 1715 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1716 mod_timer(&local->dynamic_ps_timer, jiffies + 1717 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1718 } else { 1719 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1720 ieee80211_send_nullfunc(local, sdata, true); 1721 1722 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1723 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1724 return; 1725 1726 conf->flags |= IEEE80211_CONF_PS; 1727 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1728 } 1729 } 1730 1731 static void ieee80211_change_ps(struct ieee80211_local *local) 1732 { 1733 struct ieee80211_conf *conf = &local->hw.conf; 1734 1735 if (local->ps_sdata) { 1736 ieee80211_enable_ps(local, local->ps_sdata); 1737 } else if (conf->flags & IEEE80211_CONF_PS) { 1738 conf->flags &= ~IEEE80211_CONF_PS; 1739 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1740 del_timer_sync(&local->dynamic_ps_timer); 1741 cancel_work_sync(&local->dynamic_ps_enable_work); 1742 } 1743 } 1744 1745 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1746 { 1747 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1748 struct sta_info *sta = NULL; 1749 bool authorized = false; 1750 1751 if (!mgd->powersave) 1752 return false; 1753 1754 if (mgd->broken_ap) 1755 return false; 1756 1757 if (!mgd->associated) 1758 return false; 1759 1760 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1761 return false; 1762 1763 if (!mgd->have_beacon) 1764 return false; 1765 1766 rcu_read_lock(); 1767 sta = sta_info_get(sdata, mgd->bssid); 1768 if (sta) 1769 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1770 rcu_read_unlock(); 1771 1772 return authorized; 1773 } 1774 1775 /* need to hold RTNL or interface lock */ 1776 void ieee80211_recalc_ps(struct ieee80211_local *local) 1777 { 1778 struct ieee80211_sub_if_data *sdata, *found = NULL; 1779 int count = 0; 1780 int timeout; 1781 1782 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1783 local->ps_sdata = NULL; 1784 return; 1785 } 1786 1787 list_for_each_entry(sdata, &local->interfaces, list) { 1788 if (!ieee80211_sdata_running(sdata)) 1789 continue; 1790 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1791 /* If an AP vif is found, then disable PS 1792 * by setting the count to zero thereby setting 1793 * ps_sdata to NULL. 1794 */ 1795 count = 0; 1796 break; 1797 } 1798 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1799 continue; 1800 found = sdata; 1801 count++; 1802 } 1803 1804 if (count == 1 && ieee80211_powersave_allowed(found)) { 1805 u8 dtimper = found->u.mgd.dtim_period; 1806 1807 timeout = local->dynamic_ps_forced_timeout; 1808 if (timeout < 0) 1809 timeout = 100; 1810 local->hw.conf.dynamic_ps_timeout = timeout; 1811 1812 /* If the TIM IE is invalid, pretend the value is 1 */ 1813 if (!dtimper) 1814 dtimper = 1; 1815 1816 local->hw.conf.ps_dtim_period = dtimper; 1817 local->ps_sdata = found; 1818 } else { 1819 local->ps_sdata = NULL; 1820 } 1821 1822 ieee80211_change_ps(local); 1823 } 1824 1825 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1826 { 1827 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1828 1829 if (sdata->vif.bss_conf.ps != ps_allowed) { 1830 sdata->vif.bss_conf.ps = ps_allowed; 1831 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1832 } 1833 } 1834 1835 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1836 { 1837 struct ieee80211_local *local = 1838 container_of(work, struct ieee80211_local, 1839 dynamic_ps_disable_work); 1840 1841 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1842 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1843 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1844 } 1845 1846 ieee80211_wake_queues_by_reason(&local->hw, 1847 IEEE80211_MAX_QUEUE_MAP, 1848 IEEE80211_QUEUE_STOP_REASON_PS, 1849 false); 1850 } 1851 1852 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1853 { 1854 struct ieee80211_local *local = 1855 container_of(work, struct ieee80211_local, 1856 dynamic_ps_enable_work); 1857 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1858 struct ieee80211_if_managed *ifmgd; 1859 unsigned long flags; 1860 int q; 1861 1862 /* can only happen when PS was just disabled anyway */ 1863 if (!sdata) 1864 return; 1865 1866 ifmgd = &sdata->u.mgd; 1867 1868 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1869 return; 1870 1871 if (local->hw.conf.dynamic_ps_timeout > 0) { 1872 /* don't enter PS if TX frames are pending */ 1873 if (drv_tx_frames_pending(local)) { 1874 mod_timer(&local->dynamic_ps_timer, jiffies + 1875 msecs_to_jiffies( 1876 local->hw.conf.dynamic_ps_timeout)); 1877 return; 1878 } 1879 1880 /* 1881 * transmission can be stopped by others which leads to 1882 * dynamic_ps_timer expiry. Postpone the ps timer if it 1883 * is not the actual idle state. 1884 */ 1885 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1886 for (q = 0; q < local->hw.queues; q++) { 1887 if (local->queue_stop_reasons[q]) { 1888 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1889 flags); 1890 mod_timer(&local->dynamic_ps_timer, jiffies + 1891 msecs_to_jiffies( 1892 local->hw.conf.dynamic_ps_timeout)); 1893 return; 1894 } 1895 } 1896 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1897 } 1898 1899 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1900 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1901 if (drv_tx_frames_pending(local)) { 1902 mod_timer(&local->dynamic_ps_timer, jiffies + 1903 msecs_to_jiffies( 1904 local->hw.conf.dynamic_ps_timeout)); 1905 } else { 1906 ieee80211_send_nullfunc(local, sdata, true); 1907 /* Flush to get the tx status of nullfunc frame */ 1908 ieee80211_flush_queues(local, sdata, false); 1909 } 1910 } 1911 1912 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1913 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1914 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1915 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1916 local->hw.conf.flags |= IEEE80211_CONF_PS; 1917 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1918 } 1919 } 1920 1921 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1922 { 1923 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1924 1925 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1926 } 1927 1928 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1929 { 1930 struct delayed_work *delayed_work = to_delayed_work(work); 1931 struct ieee80211_sub_if_data *sdata = 1932 container_of(delayed_work, struct ieee80211_sub_if_data, 1933 dfs_cac_timer_work); 1934 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1935 1936 mutex_lock(&sdata->local->mtx); 1937 if (sdata->wdev.cac_started) { 1938 ieee80211_vif_release_channel(sdata); 1939 cfg80211_cac_event(sdata->dev, &chandef, 1940 NL80211_RADAR_CAC_FINISHED, 1941 GFP_KERNEL); 1942 } 1943 mutex_unlock(&sdata->local->mtx); 1944 } 1945 1946 static bool 1947 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1948 { 1949 struct ieee80211_local *local = sdata->local; 1950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1951 bool ret = false; 1952 int ac; 1953 1954 if (local->hw.queues < IEEE80211_NUM_ACS) 1955 return false; 1956 1957 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1958 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1959 int non_acm_ac; 1960 unsigned long now = jiffies; 1961 1962 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1963 tx_tspec->admitted_time && 1964 time_after(now, tx_tspec->time_slice_start + HZ)) { 1965 tx_tspec->consumed_tx_time = 0; 1966 tx_tspec->time_slice_start = now; 1967 1968 if (tx_tspec->downgraded) 1969 tx_tspec->action = 1970 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1971 } 1972 1973 switch (tx_tspec->action) { 1974 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1975 /* take the original parameters */ 1976 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1977 sdata_err(sdata, 1978 "failed to set TX queue parameters for queue %d\n", 1979 ac); 1980 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1981 tx_tspec->downgraded = false; 1982 ret = true; 1983 break; 1984 case TX_TSPEC_ACTION_DOWNGRADE: 1985 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1986 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1987 ret = true; 1988 break; 1989 } 1990 /* downgrade next lower non-ACM AC */ 1991 for (non_acm_ac = ac + 1; 1992 non_acm_ac < IEEE80211_NUM_ACS; 1993 non_acm_ac++) 1994 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1995 break; 1996 /* Usually the loop will result in using BK even if it 1997 * requires admission control, but such a configuration 1998 * makes no sense and we have to transmit somehow - the 1999 * AC selection does the same thing. 2000 * If we started out trying to downgrade from BK, then 2001 * the extra condition here might be needed. 2002 */ 2003 if (non_acm_ac >= IEEE80211_NUM_ACS) 2004 non_acm_ac = IEEE80211_AC_BK; 2005 if (drv_conf_tx(local, sdata, ac, 2006 &sdata->tx_conf[non_acm_ac])) 2007 sdata_err(sdata, 2008 "failed to set TX queue parameters for queue %d\n", 2009 ac); 2010 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2011 ret = true; 2012 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2013 tx_tspec->time_slice_start + HZ - now + 1); 2014 break; 2015 case TX_TSPEC_ACTION_NONE: 2016 /* nothing now */ 2017 break; 2018 } 2019 } 2020 2021 return ret; 2022 } 2023 2024 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2025 { 2026 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2027 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 2028 } 2029 2030 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2031 { 2032 struct ieee80211_sub_if_data *sdata; 2033 2034 sdata = container_of(work, struct ieee80211_sub_if_data, 2035 u.mgd.tx_tspec_wk.work); 2036 ieee80211_sta_handle_tspec_ac_params(sdata); 2037 } 2038 2039 /* MLME */ 2040 static bool 2041 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2042 struct ieee80211_sub_if_data *sdata, 2043 const u8 *wmm_param, size_t wmm_param_len, 2044 const struct ieee80211_mu_edca_param_set *mu_edca) 2045 { 2046 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2048 size_t left; 2049 int count, mu_edca_count, ac; 2050 const u8 *pos; 2051 u8 uapsd_queues = 0; 2052 2053 if (!local->ops->conf_tx) 2054 return false; 2055 2056 if (local->hw.queues < IEEE80211_NUM_ACS) 2057 return false; 2058 2059 if (!wmm_param) 2060 return false; 2061 2062 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2063 return false; 2064 2065 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2066 uapsd_queues = ifmgd->uapsd_queues; 2067 2068 count = wmm_param[6] & 0x0f; 2069 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2070 * if mu_edca was preset before and now it disappeared tell 2071 * the driver about it. 2072 */ 2073 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2074 if (count == ifmgd->wmm_last_param_set && 2075 mu_edca_count == ifmgd->mu_edca_last_param_set) 2076 return false; 2077 ifmgd->wmm_last_param_set = count; 2078 ifmgd->mu_edca_last_param_set = mu_edca_count; 2079 2080 pos = wmm_param + 8; 2081 left = wmm_param_len - 8; 2082 2083 memset(¶ms, 0, sizeof(params)); 2084 2085 sdata->wmm_acm = 0; 2086 for (; left >= 4; left -= 4, pos += 4) { 2087 int aci = (pos[0] >> 5) & 0x03; 2088 int acm = (pos[0] >> 4) & 0x01; 2089 bool uapsd = false; 2090 2091 switch (aci) { 2092 case 1: /* AC_BK */ 2093 ac = IEEE80211_AC_BK; 2094 if (acm) 2095 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2096 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2097 uapsd = true; 2098 params[ac].mu_edca = !!mu_edca; 2099 if (mu_edca) 2100 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2101 break; 2102 case 2: /* AC_VI */ 2103 ac = IEEE80211_AC_VI; 2104 if (acm) 2105 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2106 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2107 uapsd = true; 2108 params[ac].mu_edca = !!mu_edca; 2109 if (mu_edca) 2110 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2111 break; 2112 case 3: /* AC_VO */ 2113 ac = IEEE80211_AC_VO; 2114 if (acm) 2115 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2116 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2117 uapsd = true; 2118 params[ac].mu_edca = !!mu_edca; 2119 if (mu_edca) 2120 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2121 break; 2122 case 0: /* AC_BE */ 2123 default: 2124 ac = IEEE80211_AC_BE; 2125 if (acm) 2126 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2127 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2128 uapsd = true; 2129 params[ac].mu_edca = !!mu_edca; 2130 if (mu_edca) 2131 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2132 break; 2133 } 2134 2135 params[ac].aifs = pos[0] & 0x0f; 2136 2137 if (params[ac].aifs < 2) { 2138 sdata_info(sdata, 2139 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2140 params[ac].aifs, aci); 2141 params[ac].aifs = 2; 2142 } 2143 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2144 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2145 params[ac].txop = get_unaligned_le16(pos + 2); 2146 params[ac].acm = acm; 2147 params[ac].uapsd = uapsd; 2148 2149 if (params[ac].cw_min == 0 || 2150 params[ac].cw_min > params[ac].cw_max) { 2151 sdata_info(sdata, 2152 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2153 params[ac].cw_min, params[ac].cw_max, aci); 2154 return false; 2155 } 2156 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2157 } 2158 2159 /* WMM specification requires all 4 ACIs. */ 2160 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2161 if (params[ac].cw_min == 0) { 2162 sdata_info(sdata, 2163 "AP has invalid WMM params (missing AC %d), using defaults\n", 2164 ac); 2165 return false; 2166 } 2167 } 2168 2169 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2170 mlme_dbg(sdata, 2171 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2172 ac, params[ac].acm, 2173 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2174 params[ac].txop, params[ac].uapsd, 2175 ifmgd->tx_tspec[ac].downgraded); 2176 sdata->tx_conf[ac] = params[ac]; 2177 if (!ifmgd->tx_tspec[ac].downgraded && 2178 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2179 sdata_err(sdata, 2180 "failed to set TX queue parameters for AC %d\n", 2181 ac); 2182 } 2183 2184 /* enable WMM or activate new settings */ 2185 sdata->vif.bss_conf.qos = true; 2186 return true; 2187 } 2188 2189 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2190 { 2191 lockdep_assert_held(&sdata->local->mtx); 2192 2193 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2194 ieee80211_run_deferred_scan(sdata->local); 2195 } 2196 2197 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2198 { 2199 mutex_lock(&sdata->local->mtx); 2200 __ieee80211_stop_poll(sdata); 2201 mutex_unlock(&sdata->local->mtx); 2202 } 2203 2204 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2205 u16 capab, bool erp_valid, u8 erp) 2206 { 2207 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2208 struct ieee80211_supported_band *sband; 2209 u32 changed = 0; 2210 bool use_protection; 2211 bool use_short_preamble; 2212 bool use_short_slot; 2213 2214 sband = ieee80211_get_sband(sdata); 2215 if (!sband) 2216 return changed; 2217 2218 if (erp_valid) { 2219 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2220 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2221 } else { 2222 use_protection = false; 2223 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2224 } 2225 2226 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2227 if (sband->band == NL80211_BAND_5GHZ || 2228 sband->band == NL80211_BAND_6GHZ) 2229 use_short_slot = true; 2230 2231 if (use_protection != bss_conf->use_cts_prot) { 2232 bss_conf->use_cts_prot = use_protection; 2233 changed |= BSS_CHANGED_ERP_CTS_PROT; 2234 } 2235 2236 if (use_short_preamble != bss_conf->use_short_preamble) { 2237 bss_conf->use_short_preamble = use_short_preamble; 2238 changed |= BSS_CHANGED_ERP_PREAMBLE; 2239 } 2240 2241 if (use_short_slot != bss_conf->use_short_slot) { 2242 bss_conf->use_short_slot = use_short_slot; 2243 changed |= BSS_CHANGED_ERP_SLOT; 2244 } 2245 2246 return changed; 2247 } 2248 2249 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2250 struct cfg80211_bss *cbss, 2251 u32 bss_info_changed) 2252 { 2253 struct ieee80211_bss *bss = (void *)cbss->priv; 2254 struct ieee80211_local *local = sdata->local; 2255 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2256 2257 bss_info_changed |= BSS_CHANGED_ASSOC; 2258 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2259 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2260 2261 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2262 beacon_loss_count * bss_conf->beacon_int)); 2263 2264 sdata->u.mgd.associated = cbss; 2265 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2266 2267 ieee80211_check_rate_mask(sdata); 2268 2269 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2270 2271 if (sdata->vif.p2p || 2272 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2273 const struct cfg80211_bss_ies *ies; 2274 2275 rcu_read_lock(); 2276 ies = rcu_dereference(cbss->ies); 2277 if (ies) { 2278 int ret; 2279 2280 ret = cfg80211_get_p2p_attr( 2281 ies->data, ies->len, 2282 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2283 (u8 *) &bss_conf->p2p_noa_attr, 2284 sizeof(bss_conf->p2p_noa_attr)); 2285 if (ret >= 2) { 2286 sdata->u.mgd.p2p_noa_index = 2287 bss_conf->p2p_noa_attr.index; 2288 bss_info_changed |= BSS_CHANGED_P2P_PS; 2289 } 2290 } 2291 rcu_read_unlock(); 2292 } 2293 2294 /* just to be sure */ 2295 ieee80211_stop_poll(sdata); 2296 2297 ieee80211_led_assoc(local, 1); 2298 2299 if (sdata->u.mgd.have_beacon) { 2300 /* 2301 * If the AP is buggy we may get here with no DTIM period 2302 * known, so assume it's 1 which is the only safe assumption 2303 * in that case, although if the TIM IE is broken powersave 2304 * probably just won't work at all. 2305 */ 2306 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2307 bss_conf->beacon_rate = bss->beacon_rate; 2308 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2309 } else { 2310 bss_conf->beacon_rate = NULL; 2311 bss_conf->dtim_period = 0; 2312 } 2313 2314 bss_conf->assoc = 1; 2315 2316 /* Tell the driver to monitor connection quality (if supported) */ 2317 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2318 bss_conf->cqm_rssi_thold) 2319 bss_info_changed |= BSS_CHANGED_CQM; 2320 2321 /* Enable ARP filtering */ 2322 if (bss_conf->arp_addr_cnt) 2323 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2324 2325 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2326 2327 mutex_lock(&local->iflist_mtx); 2328 ieee80211_recalc_ps(local); 2329 mutex_unlock(&local->iflist_mtx); 2330 2331 ieee80211_recalc_smps(sdata); 2332 ieee80211_recalc_ps_vif(sdata); 2333 2334 netif_carrier_on(sdata->dev); 2335 } 2336 2337 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2338 u16 stype, u16 reason, bool tx, 2339 u8 *frame_buf) 2340 { 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2342 struct ieee80211_local *local = sdata->local; 2343 u32 changed = 0; 2344 2345 sdata_assert_lock(sdata); 2346 2347 if (WARN_ON_ONCE(tx && !frame_buf)) 2348 return; 2349 2350 if (WARN_ON(!ifmgd->associated)) 2351 return; 2352 2353 ieee80211_stop_poll(sdata); 2354 2355 ifmgd->associated = NULL; 2356 netif_carrier_off(sdata->dev); 2357 2358 /* 2359 * if we want to get out of ps before disassoc (why?) we have 2360 * to do it before sending disassoc, as otherwise the null-packet 2361 * won't be valid. 2362 */ 2363 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2364 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2365 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2366 } 2367 local->ps_sdata = NULL; 2368 2369 /* disable per-vif ps */ 2370 ieee80211_recalc_ps_vif(sdata); 2371 2372 /* make sure ongoing transmission finishes */ 2373 synchronize_net(); 2374 2375 /* 2376 * drop any frame before deauth/disassoc, this can be data or 2377 * management frame. Since we are disconnecting, we should not 2378 * insist sending these frames which can take time and delay 2379 * the disconnection and possible the roaming. 2380 */ 2381 if (tx) 2382 ieee80211_flush_queues(local, sdata, true); 2383 2384 /* deauthenticate/disassociate now */ 2385 if (tx || frame_buf) { 2386 /* 2387 * In multi channel scenarios guarantee that the virtual 2388 * interface is granted immediate airtime to transmit the 2389 * deauthentication frame by calling mgd_prepare_tx, if the 2390 * driver requested so. 2391 */ 2392 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2393 !ifmgd->have_beacon) 2394 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2395 2396 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2397 ifmgd->bssid, stype, reason, 2398 tx, frame_buf); 2399 } 2400 2401 /* flush out frame - make sure the deauth was actually sent */ 2402 if (tx) 2403 ieee80211_flush_queues(local, sdata, false); 2404 2405 /* clear bssid only after building the needed mgmt frames */ 2406 eth_zero_addr(ifmgd->bssid); 2407 2408 sdata->vif.bss_conf.ssid_len = 0; 2409 2410 /* remove AP and TDLS peers */ 2411 sta_info_flush(sdata); 2412 2413 /* finally reset all BSS / config parameters */ 2414 changed |= ieee80211_reset_erp_info(sdata); 2415 2416 ieee80211_led_assoc(local, 0); 2417 changed |= BSS_CHANGED_ASSOC; 2418 sdata->vif.bss_conf.assoc = false; 2419 2420 ifmgd->p2p_noa_index = -1; 2421 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2422 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2423 2424 /* on the next assoc, re-program HT/VHT parameters */ 2425 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2426 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2427 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2428 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2429 2430 /* reset MU-MIMO ownership and group data */ 2431 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2432 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2433 memset(sdata->vif.bss_conf.mu_group.position, 0, 2434 sizeof(sdata->vif.bss_conf.mu_group.position)); 2435 changed |= BSS_CHANGED_MU_GROUPS; 2436 sdata->vif.mu_mimo_owner = false; 2437 2438 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2439 2440 del_timer_sync(&local->dynamic_ps_timer); 2441 cancel_work_sync(&local->dynamic_ps_enable_work); 2442 2443 /* Disable ARP filtering */ 2444 if (sdata->vif.bss_conf.arp_addr_cnt) 2445 changed |= BSS_CHANGED_ARP_FILTER; 2446 2447 sdata->vif.bss_conf.qos = false; 2448 changed |= BSS_CHANGED_QOS; 2449 2450 /* The BSSID (not really interesting) and HT changed */ 2451 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2452 ieee80211_bss_info_change_notify(sdata, changed); 2453 2454 /* disassociated - set to defaults now */ 2455 ieee80211_set_wmm_default(sdata, false, false); 2456 2457 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2458 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2459 del_timer_sync(&sdata->u.mgd.timer); 2460 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2461 2462 sdata->vif.bss_conf.dtim_period = 0; 2463 sdata->vif.bss_conf.beacon_rate = NULL; 2464 2465 ifmgd->have_beacon = false; 2466 2467 ifmgd->flags = 0; 2468 mutex_lock(&local->mtx); 2469 ieee80211_vif_release_channel(sdata); 2470 2471 sdata->vif.csa_active = false; 2472 ifmgd->csa_waiting_bcn = false; 2473 ifmgd->csa_ignored_same_chan = false; 2474 if (sdata->csa_block_tx) { 2475 ieee80211_wake_vif_queues(local, sdata, 2476 IEEE80211_QUEUE_STOP_REASON_CSA); 2477 sdata->csa_block_tx = false; 2478 } 2479 mutex_unlock(&local->mtx); 2480 2481 /* existing TX TSPEC sessions no longer exist */ 2482 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2483 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2484 2485 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2486 } 2487 2488 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2489 { 2490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2491 struct ieee80211_local *local = sdata->local; 2492 2493 mutex_lock(&local->mtx); 2494 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2495 goto out; 2496 2497 __ieee80211_stop_poll(sdata); 2498 2499 mutex_lock(&local->iflist_mtx); 2500 ieee80211_recalc_ps(local); 2501 mutex_unlock(&local->iflist_mtx); 2502 2503 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2504 goto out; 2505 2506 /* 2507 * We've received a probe response, but are not sure whether 2508 * we have or will be receiving any beacons or data, so let's 2509 * schedule the timers again, just in case. 2510 */ 2511 ieee80211_sta_reset_beacon_monitor(sdata); 2512 2513 mod_timer(&ifmgd->conn_mon_timer, 2514 round_jiffies_up(jiffies + 2515 IEEE80211_CONNECTION_IDLE_TIME)); 2516 out: 2517 mutex_unlock(&local->mtx); 2518 } 2519 2520 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2521 struct ieee80211_hdr *hdr, 2522 u16 tx_time) 2523 { 2524 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2525 u16 tid = ieee80211_get_tid(hdr); 2526 int ac = ieee80211_ac_from_tid(tid); 2527 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2528 unsigned long now = jiffies; 2529 2530 if (likely(!tx_tspec->admitted_time)) 2531 return; 2532 2533 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2534 tx_tspec->consumed_tx_time = 0; 2535 tx_tspec->time_slice_start = now; 2536 2537 if (tx_tspec->downgraded) { 2538 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2539 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2540 } 2541 } 2542 2543 if (tx_tspec->downgraded) 2544 return; 2545 2546 tx_tspec->consumed_tx_time += tx_time; 2547 2548 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2549 tx_tspec->downgraded = true; 2550 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2551 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2552 } 2553 } 2554 2555 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2556 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2557 { 2558 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2559 2560 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2561 !sdata->u.mgd.probe_send_count) 2562 return; 2563 2564 if (ack) 2565 sdata->u.mgd.probe_send_count = 0; 2566 else 2567 sdata->u.mgd.nullfunc_failed = true; 2568 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2569 } 2570 2571 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2572 const u8 *src, const u8 *dst, 2573 const u8 *ssid, size_t ssid_len, 2574 struct ieee80211_channel *channel) 2575 { 2576 struct sk_buff *skb; 2577 2578 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2579 ssid, ssid_len, NULL, 0, 2580 IEEE80211_PROBE_FLAG_DIRECTED); 2581 if (skb) 2582 ieee80211_tx_skb(sdata, skb); 2583 } 2584 2585 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2586 { 2587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2588 const u8 *ssid; 2589 u8 *dst = ifmgd->associated->bssid; 2590 u8 unicast_limit = max(1, max_probe_tries - 3); 2591 struct sta_info *sta; 2592 2593 /* 2594 * Try sending broadcast probe requests for the last three 2595 * probe requests after the first ones failed since some 2596 * buggy APs only support broadcast probe requests. 2597 */ 2598 if (ifmgd->probe_send_count >= unicast_limit) 2599 dst = NULL; 2600 2601 /* 2602 * When the hardware reports an accurate Tx ACK status, it's 2603 * better to send a nullfunc frame instead of a probe request, 2604 * as it will kick us off the AP quickly if we aren't associated 2605 * anymore. The timeout will be reset if the frame is ACKed by 2606 * the AP. 2607 */ 2608 ifmgd->probe_send_count++; 2609 2610 if (dst) { 2611 mutex_lock(&sdata->local->sta_mtx); 2612 sta = sta_info_get(sdata, dst); 2613 if (!WARN_ON(!sta)) 2614 ieee80211_check_fast_rx(sta); 2615 mutex_unlock(&sdata->local->sta_mtx); 2616 } 2617 2618 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2619 ifmgd->nullfunc_failed = false; 2620 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2621 ifmgd->probe_send_count--; 2622 else 2623 ieee80211_send_nullfunc(sdata->local, sdata, false); 2624 } else { 2625 int ssid_len; 2626 2627 rcu_read_lock(); 2628 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2629 if (WARN_ON_ONCE(ssid == NULL)) 2630 ssid_len = 0; 2631 else 2632 ssid_len = ssid[1]; 2633 2634 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2635 ssid + 2, ssid_len, 2636 ifmgd->associated->channel); 2637 rcu_read_unlock(); 2638 } 2639 2640 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2641 run_again(sdata, ifmgd->probe_timeout); 2642 } 2643 2644 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2645 bool beacon) 2646 { 2647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2648 bool already = false; 2649 2650 if (!ieee80211_sdata_running(sdata)) 2651 return; 2652 2653 sdata_lock(sdata); 2654 2655 if (!ifmgd->associated) 2656 goto out; 2657 2658 mutex_lock(&sdata->local->mtx); 2659 2660 if (sdata->local->tmp_channel || sdata->local->scanning) { 2661 mutex_unlock(&sdata->local->mtx); 2662 goto out; 2663 } 2664 2665 if (beacon) { 2666 mlme_dbg_ratelimited(sdata, 2667 "detected beacon loss from AP (missed %d beacons) - probing\n", 2668 beacon_loss_count); 2669 2670 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2671 } 2672 2673 /* 2674 * The driver/our work has already reported this event or the 2675 * connection monitoring has kicked in and we have already sent 2676 * a probe request. Or maybe the AP died and the driver keeps 2677 * reporting until we disassociate... 2678 * 2679 * In either case we have to ignore the current call to this 2680 * function (except for setting the correct probe reason bit) 2681 * because otherwise we would reset the timer every time and 2682 * never check whether we received a probe response! 2683 */ 2684 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2685 already = true; 2686 2687 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2688 2689 mutex_unlock(&sdata->local->mtx); 2690 2691 if (already) 2692 goto out; 2693 2694 mutex_lock(&sdata->local->iflist_mtx); 2695 ieee80211_recalc_ps(sdata->local); 2696 mutex_unlock(&sdata->local->iflist_mtx); 2697 2698 ifmgd->probe_send_count = 0; 2699 ieee80211_mgd_probe_ap_send(sdata); 2700 out: 2701 sdata_unlock(sdata); 2702 } 2703 2704 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2705 struct ieee80211_vif *vif) 2706 { 2707 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2709 struct cfg80211_bss *cbss; 2710 struct sk_buff *skb; 2711 const u8 *ssid; 2712 int ssid_len; 2713 2714 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2715 return NULL; 2716 2717 sdata_assert_lock(sdata); 2718 2719 if (ifmgd->associated) 2720 cbss = ifmgd->associated; 2721 else if (ifmgd->auth_data) 2722 cbss = ifmgd->auth_data->bss; 2723 else if (ifmgd->assoc_data) 2724 cbss = ifmgd->assoc_data->bss; 2725 else 2726 return NULL; 2727 2728 rcu_read_lock(); 2729 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2730 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2731 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2732 ssid_len = 0; 2733 else 2734 ssid_len = ssid[1]; 2735 2736 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2737 (u32) -1, cbss->channel, 2738 ssid + 2, ssid_len, 2739 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2740 rcu_read_unlock(); 2741 2742 return skb; 2743 } 2744 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2745 2746 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2747 const u8 *buf, size_t len, bool tx, 2748 u16 reason, bool reconnect) 2749 { 2750 struct ieee80211_event event = { 2751 .type = MLME_EVENT, 2752 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2753 .u.mlme.reason = reason, 2754 }; 2755 2756 if (tx) 2757 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2758 else 2759 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2760 2761 drv_event_callback(sdata->local, sdata, &event); 2762 } 2763 2764 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2765 { 2766 struct ieee80211_local *local = sdata->local; 2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2768 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2769 bool tx; 2770 2771 sdata_lock(sdata); 2772 if (!ifmgd->associated) { 2773 sdata_unlock(sdata); 2774 return; 2775 } 2776 2777 tx = !sdata->csa_block_tx; 2778 2779 if (!ifmgd->driver_disconnect) { 2780 /* 2781 * AP is probably out of range (or not reachable for another 2782 * reason) so remove the bss struct for that AP. 2783 */ 2784 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2785 } 2786 2787 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2788 ifmgd->driver_disconnect ? 2789 WLAN_REASON_DEAUTH_LEAVING : 2790 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2791 tx, frame_buf); 2792 mutex_lock(&local->mtx); 2793 sdata->vif.csa_active = false; 2794 ifmgd->csa_waiting_bcn = false; 2795 if (sdata->csa_block_tx) { 2796 ieee80211_wake_vif_queues(local, sdata, 2797 IEEE80211_QUEUE_STOP_REASON_CSA); 2798 sdata->csa_block_tx = false; 2799 } 2800 mutex_unlock(&local->mtx); 2801 2802 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2804 ifmgd->reconnect); 2805 ifmgd->reconnect = false; 2806 2807 sdata_unlock(sdata); 2808 } 2809 2810 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2811 { 2812 struct ieee80211_sub_if_data *sdata = 2813 container_of(work, struct ieee80211_sub_if_data, 2814 u.mgd.beacon_connection_loss_work); 2815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2816 2817 if (ifmgd->associated) 2818 ifmgd->beacon_loss_count++; 2819 2820 if (ifmgd->connection_loss) { 2821 sdata_info(sdata, "Connection to AP %pM lost\n", 2822 ifmgd->bssid); 2823 __ieee80211_disconnect(sdata); 2824 ifmgd->connection_loss = false; 2825 } else if (ifmgd->driver_disconnect) { 2826 sdata_info(sdata, 2827 "Driver requested disconnection from AP %pM\n", 2828 ifmgd->bssid); 2829 __ieee80211_disconnect(sdata); 2830 ifmgd->driver_disconnect = false; 2831 } else { 2832 ieee80211_mgd_probe_ap(sdata, true); 2833 } 2834 } 2835 2836 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2837 { 2838 struct ieee80211_sub_if_data *sdata = 2839 container_of(work, struct ieee80211_sub_if_data, 2840 u.mgd.csa_connection_drop_work); 2841 2842 __ieee80211_disconnect(sdata); 2843 } 2844 2845 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2846 { 2847 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2848 struct ieee80211_hw *hw = &sdata->local->hw; 2849 2850 trace_api_beacon_loss(sdata); 2851 2852 sdata->u.mgd.connection_loss = false; 2853 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2854 } 2855 EXPORT_SYMBOL(ieee80211_beacon_loss); 2856 2857 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2858 { 2859 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2860 struct ieee80211_hw *hw = &sdata->local->hw; 2861 2862 trace_api_connection_loss(sdata); 2863 2864 sdata->u.mgd.connection_loss = true; 2865 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2866 } 2867 EXPORT_SYMBOL(ieee80211_connection_loss); 2868 2869 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2870 { 2871 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2872 struct ieee80211_hw *hw = &sdata->local->hw; 2873 2874 trace_api_disconnect(sdata, reconnect); 2875 2876 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2877 return; 2878 2879 sdata->u.mgd.driver_disconnect = true; 2880 sdata->u.mgd.reconnect = reconnect; 2881 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2882 } 2883 EXPORT_SYMBOL(ieee80211_disconnect); 2884 2885 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2886 bool assoc) 2887 { 2888 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2889 2890 sdata_assert_lock(sdata); 2891 2892 if (!assoc) { 2893 /* 2894 * we are not authenticated yet, the only timer that could be 2895 * running is the timeout for the authentication response which 2896 * which is not relevant anymore. 2897 */ 2898 del_timer_sync(&sdata->u.mgd.timer); 2899 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2900 2901 eth_zero_addr(sdata->u.mgd.bssid); 2902 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2903 sdata->u.mgd.flags = 0; 2904 mutex_lock(&sdata->local->mtx); 2905 ieee80211_vif_release_channel(sdata); 2906 mutex_unlock(&sdata->local->mtx); 2907 } 2908 2909 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2910 kfree(auth_data); 2911 sdata->u.mgd.auth_data = NULL; 2912 } 2913 2914 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2915 bool assoc, bool abandon) 2916 { 2917 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2918 2919 sdata_assert_lock(sdata); 2920 2921 if (!assoc) { 2922 /* 2923 * we are not associated yet, the only timer that could be 2924 * running is the timeout for the association response which 2925 * which is not relevant anymore. 2926 */ 2927 del_timer_sync(&sdata->u.mgd.timer); 2928 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2929 2930 eth_zero_addr(sdata->u.mgd.bssid); 2931 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2932 sdata->u.mgd.flags = 0; 2933 sdata->vif.mu_mimo_owner = false; 2934 2935 mutex_lock(&sdata->local->mtx); 2936 ieee80211_vif_release_channel(sdata); 2937 mutex_unlock(&sdata->local->mtx); 2938 2939 if (abandon) 2940 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2941 } 2942 2943 kfree(assoc_data); 2944 sdata->u.mgd.assoc_data = NULL; 2945 } 2946 2947 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2948 struct ieee80211_mgmt *mgmt, size_t len) 2949 { 2950 struct ieee80211_local *local = sdata->local; 2951 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2952 u8 *pos; 2953 struct ieee802_11_elems elems; 2954 u32 tx_flags = 0; 2955 2956 pos = mgmt->u.auth.variable; 2957 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2958 mgmt->bssid, auth_data->bss->bssid); 2959 if (!elems.challenge) 2960 return; 2961 auth_data->expected_transaction = 4; 2962 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2964 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2965 IEEE80211_TX_INTFL_MLME_CONN_TX; 2966 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2967 elems.challenge - 2, elems.challenge_len + 2, 2968 auth_data->bss->bssid, auth_data->bss->bssid, 2969 auth_data->key, auth_data->key_len, 2970 auth_data->key_idx, tx_flags); 2971 } 2972 2973 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2974 const u8 *bssid) 2975 { 2976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2977 struct sta_info *sta; 2978 bool result = true; 2979 2980 sdata_info(sdata, "authenticated\n"); 2981 ifmgd->auth_data->done = true; 2982 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2983 ifmgd->auth_data->timeout_started = true; 2984 run_again(sdata, ifmgd->auth_data->timeout); 2985 2986 /* move station state to auth */ 2987 mutex_lock(&sdata->local->sta_mtx); 2988 sta = sta_info_get(sdata, bssid); 2989 if (!sta) { 2990 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2991 result = false; 2992 goto out; 2993 } 2994 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2995 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2996 result = false; 2997 goto out; 2998 } 2999 3000 out: 3001 mutex_unlock(&sdata->local->sta_mtx); 3002 return result; 3003 } 3004 3005 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3006 struct ieee80211_mgmt *mgmt, size_t len) 3007 { 3008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3009 u8 bssid[ETH_ALEN]; 3010 u16 auth_alg, auth_transaction, status_code; 3011 struct ieee80211_event event = { 3012 .type = MLME_EVENT, 3013 .u.mlme.data = AUTH_EVENT, 3014 }; 3015 3016 sdata_assert_lock(sdata); 3017 3018 if (len < 24 + 6) 3019 return; 3020 3021 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3022 return; 3023 3024 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3025 3026 if (!ether_addr_equal(bssid, mgmt->bssid)) 3027 return; 3028 3029 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3030 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3031 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3032 3033 if (auth_alg != ifmgd->auth_data->algorithm || 3034 (auth_alg != WLAN_AUTH_SAE && 3035 auth_transaction != ifmgd->auth_data->expected_transaction) || 3036 (auth_alg == WLAN_AUTH_SAE && 3037 (auth_transaction < ifmgd->auth_data->expected_transaction || 3038 auth_transaction > 2))) { 3039 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3040 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3041 auth_transaction, 3042 ifmgd->auth_data->expected_transaction); 3043 return; 3044 } 3045 3046 if (status_code != WLAN_STATUS_SUCCESS) { 3047 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3048 3049 if (auth_alg == WLAN_AUTH_SAE && 3050 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3051 (auth_transaction == 1 && 3052 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3053 status_code == WLAN_STATUS_SAE_PK)))) 3054 return; 3055 3056 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3057 mgmt->sa, status_code); 3058 ieee80211_destroy_auth_data(sdata, false); 3059 event.u.mlme.status = MLME_DENIED; 3060 event.u.mlme.reason = status_code; 3061 drv_event_callback(sdata->local, sdata, &event); 3062 return; 3063 } 3064 3065 switch (ifmgd->auth_data->algorithm) { 3066 case WLAN_AUTH_OPEN: 3067 case WLAN_AUTH_LEAP: 3068 case WLAN_AUTH_FT: 3069 case WLAN_AUTH_SAE: 3070 case WLAN_AUTH_FILS_SK: 3071 case WLAN_AUTH_FILS_SK_PFS: 3072 case WLAN_AUTH_FILS_PK: 3073 break; 3074 case WLAN_AUTH_SHARED_KEY: 3075 if (ifmgd->auth_data->expected_transaction != 4) { 3076 ieee80211_auth_challenge(sdata, mgmt, len); 3077 /* need another frame */ 3078 return; 3079 } 3080 break; 3081 default: 3082 WARN_ONCE(1, "invalid auth alg %d", 3083 ifmgd->auth_data->algorithm); 3084 return; 3085 } 3086 3087 event.u.mlme.status = MLME_SUCCESS; 3088 drv_event_callback(sdata->local, sdata, &event); 3089 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3090 (auth_transaction == 2 && 3091 ifmgd->auth_data->expected_transaction == 2)) { 3092 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3093 return; /* ignore frame -- wait for timeout */ 3094 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3095 auth_transaction == 2) { 3096 sdata_info(sdata, "SAE peer confirmed\n"); 3097 ifmgd->auth_data->peer_confirmed = true; 3098 } 3099 3100 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3101 } 3102 3103 #define case_WLAN(type) \ 3104 case WLAN_REASON_##type: return #type 3105 3106 const char *ieee80211_get_reason_code_string(u16 reason_code) 3107 { 3108 switch (reason_code) { 3109 case_WLAN(UNSPECIFIED); 3110 case_WLAN(PREV_AUTH_NOT_VALID); 3111 case_WLAN(DEAUTH_LEAVING); 3112 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3113 case_WLAN(DISASSOC_AP_BUSY); 3114 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3115 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3116 case_WLAN(DISASSOC_STA_HAS_LEFT); 3117 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3118 case_WLAN(DISASSOC_BAD_POWER); 3119 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3120 case_WLAN(INVALID_IE); 3121 case_WLAN(MIC_FAILURE); 3122 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3123 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3124 case_WLAN(IE_DIFFERENT); 3125 case_WLAN(INVALID_GROUP_CIPHER); 3126 case_WLAN(INVALID_PAIRWISE_CIPHER); 3127 case_WLAN(INVALID_AKMP); 3128 case_WLAN(UNSUPP_RSN_VERSION); 3129 case_WLAN(INVALID_RSN_IE_CAP); 3130 case_WLAN(IEEE8021X_FAILED); 3131 case_WLAN(CIPHER_SUITE_REJECTED); 3132 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3133 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3134 case_WLAN(DISASSOC_LOW_ACK); 3135 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3136 case_WLAN(QSTA_LEAVE_QBSS); 3137 case_WLAN(QSTA_NOT_USE); 3138 case_WLAN(QSTA_REQUIRE_SETUP); 3139 case_WLAN(QSTA_TIMEOUT); 3140 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3141 case_WLAN(MESH_PEER_CANCELED); 3142 case_WLAN(MESH_MAX_PEERS); 3143 case_WLAN(MESH_CONFIG); 3144 case_WLAN(MESH_CLOSE); 3145 case_WLAN(MESH_MAX_RETRIES); 3146 case_WLAN(MESH_CONFIRM_TIMEOUT); 3147 case_WLAN(MESH_INVALID_GTK); 3148 case_WLAN(MESH_INCONSISTENT_PARAM); 3149 case_WLAN(MESH_INVALID_SECURITY); 3150 case_WLAN(MESH_PATH_ERROR); 3151 case_WLAN(MESH_PATH_NOFORWARD); 3152 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3153 case_WLAN(MAC_EXISTS_IN_MBSS); 3154 case_WLAN(MESH_CHAN_REGULATORY); 3155 case_WLAN(MESH_CHAN); 3156 default: return "<unknown>"; 3157 } 3158 } 3159 3160 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3161 struct ieee80211_mgmt *mgmt, size_t len) 3162 { 3163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3164 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3165 3166 sdata_assert_lock(sdata); 3167 3168 if (len < 24 + 2) 3169 return; 3170 3171 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3172 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3173 return; 3174 } 3175 3176 if (ifmgd->associated && 3177 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3178 const u8 *bssid = ifmgd->associated->bssid; 3179 3180 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3181 bssid, reason_code, 3182 ieee80211_get_reason_code_string(reason_code)); 3183 3184 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3185 3186 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3187 reason_code, false); 3188 return; 3189 } 3190 3191 if (ifmgd->assoc_data && 3192 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3193 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3194 3195 sdata_info(sdata, 3196 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3197 bssid, reason_code, 3198 ieee80211_get_reason_code_string(reason_code)); 3199 3200 ieee80211_destroy_assoc_data(sdata, false, true); 3201 3202 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3203 return; 3204 } 3205 } 3206 3207 3208 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3209 struct ieee80211_mgmt *mgmt, size_t len) 3210 { 3211 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3212 u16 reason_code; 3213 3214 sdata_assert_lock(sdata); 3215 3216 if (len < 24 + 2) 3217 return; 3218 3219 if (!ifmgd->associated || 3220 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3221 return; 3222 3223 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3224 3225 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3226 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3227 return; 3228 } 3229 3230 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3231 mgmt->sa, reason_code, 3232 ieee80211_get_reason_code_string(reason_code)); 3233 3234 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3235 3236 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3237 false); 3238 } 3239 3240 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3241 u8 *supp_rates, unsigned int supp_rates_len, 3242 u32 *rates, u32 *basic_rates, 3243 bool *have_higher_than_11mbit, 3244 int *min_rate, int *min_rate_index, 3245 int shift) 3246 { 3247 int i, j; 3248 3249 for (i = 0; i < supp_rates_len; i++) { 3250 int rate = supp_rates[i] & 0x7f; 3251 bool is_basic = !!(supp_rates[i] & 0x80); 3252 3253 if ((rate * 5 * (1 << shift)) > 110) 3254 *have_higher_than_11mbit = true; 3255 3256 /* 3257 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3258 * since they're not rates. 3259 * 3260 * Note: Even though the membership selector and the basic 3261 * rate flag share the same bit, they are not exactly 3262 * the same. 3263 */ 3264 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3265 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3266 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3267 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3268 continue; 3269 3270 for (j = 0; j < sband->n_bitrates; j++) { 3271 struct ieee80211_rate *br; 3272 int brate; 3273 3274 br = &sband->bitrates[j]; 3275 3276 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3277 if (brate == rate) { 3278 *rates |= BIT(j); 3279 if (is_basic) 3280 *basic_rates |= BIT(j); 3281 if ((rate * 5) < *min_rate) { 3282 *min_rate = rate * 5; 3283 *min_rate_index = j; 3284 } 3285 break; 3286 } 3287 } 3288 } 3289 } 3290 3291 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3292 const struct ieee802_11_elems *elems) 3293 { 3294 if (elems->ext_capab_len < 10) 3295 return false; 3296 3297 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3298 return false; 3299 3300 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3301 IEEE80211_HE_MAC_CAP0_TWT_RES; 3302 } 3303 3304 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3305 struct sta_info *sta, 3306 struct ieee802_11_elems *elems) 3307 { 3308 bool twt = ieee80211_twt_req_supported(sta, elems); 3309 3310 if (sdata->vif.bss_conf.twt_requester != twt) { 3311 sdata->vif.bss_conf.twt_requester = twt; 3312 return BSS_CHANGED_TWT; 3313 } 3314 return 0; 3315 } 3316 3317 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3318 struct cfg80211_bss *cbss, 3319 struct ieee80211_mgmt *mgmt, size_t len, 3320 struct ieee802_11_elems *elems) 3321 { 3322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3323 struct ieee80211_local *local = sdata->local; 3324 struct ieee80211_supported_band *sband; 3325 struct sta_info *sta; 3326 u16 capab_info, aid; 3327 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3328 const struct cfg80211_bss_ies *bss_ies = NULL; 3329 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3330 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3331 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3332 u32 changed = 0; 3333 u8 *pos; 3334 int err; 3335 bool ret; 3336 3337 /* AssocResp and ReassocResp have identical structure */ 3338 3339 pos = mgmt->u.assoc_resp.variable; 3340 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3341 if (is_s1g) { 3342 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3343 aid = 0; /* TODO */ 3344 } 3345 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3346 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems, 3347 mgmt->bssid, assoc_data->bss->bssid); 3348 3349 if (elems->aid_resp) 3350 aid = le16_to_cpu(elems->aid_resp->aid); 3351 3352 /* 3353 * The 5 MSB of the AID field are reserved 3354 * (802.11-2016 9.4.1.8 AID field) 3355 */ 3356 aid &= 0x7ff; 3357 3358 ifmgd->broken_ap = false; 3359 3360 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3361 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3362 aid); 3363 aid = 0; 3364 ifmgd->broken_ap = true; 3365 } 3366 3367 if (!is_s1g && !elems->supp_rates) { 3368 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3369 return false; 3370 } 3371 3372 sdata->vif.bss_conf.aid = aid; 3373 ifmgd->tdls_chan_switch_prohibited = 3374 elems->ext_capab && elems->ext_capab_len >= 5 && 3375 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3376 3377 /* 3378 * Some APs are erroneously not including some information in their 3379 * (re)association response frames. Try to recover by using the data 3380 * from the beacon or probe response. This seems to afflict mobile 3381 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3382 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3383 */ 3384 if (!is_6ghz && 3385 ((assoc_data->wmm && !elems->wmm_param) || 3386 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3387 (!elems->ht_cap_elem || !elems->ht_operation)) || 3388 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3389 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3390 const struct cfg80211_bss_ies *ies; 3391 struct ieee802_11_elems bss_elems; 3392 3393 rcu_read_lock(); 3394 ies = rcu_dereference(cbss->ies); 3395 if (ies) 3396 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3397 GFP_ATOMIC); 3398 rcu_read_unlock(); 3399 if (!bss_ies) 3400 return false; 3401 3402 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3403 false, &bss_elems, 3404 mgmt->bssid, 3405 assoc_data->bss->bssid); 3406 if (assoc_data->wmm && 3407 !elems->wmm_param && bss_elems.wmm_param) { 3408 elems->wmm_param = bss_elems.wmm_param; 3409 sdata_info(sdata, 3410 "AP bug: WMM param missing from AssocResp\n"); 3411 } 3412 3413 /* 3414 * Also check if we requested HT/VHT, otherwise the AP doesn't 3415 * have to include the IEs in the (re)association response. 3416 */ 3417 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3418 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3419 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3420 sdata_info(sdata, 3421 "AP bug: HT capability missing from AssocResp\n"); 3422 } 3423 if (!elems->ht_operation && bss_elems.ht_operation && 3424 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3425 elems->ht_operation = bss_elems.ht_operation; 3426 sdata_info(sdata, 3427 "AP bug: HT operation missing from AssocResp\n"); 3428 } 3429 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3430 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3431 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3432 sdata_info(sdata, 3433 "AP bug: VHT capa missing from AssocResp\n"); 3434 } 3435 if (!elems->vht_operation && bss_elems.vht_operation && 3436 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3437 elems->vht_operation = bss_elems.vht_operation; 3438 sdata_info(sdata, 3439 "AP bug: VHT operation missing from AssocResp\n"); 3440 } 3441 } 3442 3443 /* 3444 * We previously checked these in the beacon/probe response, so 3445 * they should be present here. This is just a safety net. 3446 */ 3447 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3448 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3449 sdata_info(sdata, 3450 "HT AP is missing WMM params or HT capability/operation\n"); 3451 ret = false; 3452 goto out; 3453 } 3454 3455 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3456 (!elems->vht_cap_elem || !elems->vht_operation)) { 3457 sdata_info(sdata, 3458 "VHT AP is missing VHT capability/operation\n"); 3459 ret = false; 3460 goto out; 3461 } 3462 3463 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3464 !elems->he_6ghz_capa) { 3465 sdata_info(sdata, 3466 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3467 ret = false; 3468 goto out; 3469 } 3470 3471 mutex_lock(&sdata->local->sta_mtx); 3472 /* 3473 * station info was already allocated and inserted before 3474 * the association and should be available to us 3475 */ 3476 sta = sta_info_get(sdata, cbss->bssid); 3477 if (WARN_ON(!sta)) { 3478 mutex_unlock(&sdata->local->sta_mtx); 3479 ret = false; 3480 goto out; 3481 } 3482 3483 sband = ieee80211_get_sband(sdata); 3484 if (!sband) { 3485 mutex_unlock(&sdata->local->sta_mtx); 3486 ret = false; 3487 goto out; 3488 } 3489 3490 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3491 (!elems->he_cap || !elems->he_operation)) { 3492 mutex_unlock(&sdata->local->sta_mtx); 3493 sdata_info(sdata, 3494 "HE AP is missing HE capability/operation\n"); 3495 ret = false; 3496 goto out; 3497 } 3498 3499 /* Set up internal HT/VHT capabilities */ 3500 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3501 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3502 elems->ht_cap_elem, sta); 3503 3504 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3505 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3506 elems->vht_cap_elem, sta); 3507 3508 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3509 elems->he_cap) { 3510 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3511 elems->he_cap, 3512 elems->he_cap_len, 3513 elems->he_6ghz_capa, 3514 sta); 3515 3516 bss_conf->he_support = sta->sta.he_cap.has_he; 3517 if (elems->rsnx && elems->rsnx_len && 3518 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3519 wiphy_ext_feature_isset(local->hw.wiphy, 3520 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3521 bss_conf->twt_protected = true; 3522 else 3523 bss_conf->twt_protected = false; 3524 3525 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3526 } else { 3527 bss_conf->he_support = false; 3528 bss_conf->twt_requester = false; 3529 bss_conf->twt_protected = false; 3530 } 3531 3532 if (bss_conf->he_support) { 3533 bss_conf->he_bss_color.color = 3534 le32_get_bits(elems->he_operation->he_oper_params, 3535 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3536 bss_conf->he_bss_color.partial = 3537 le32_get_bits(elems->he_operation->he_oper_params, 3538 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3539 bss_conf->he_bss_color.enabled = 3540 !le32_get_bits(elems->he_operation->he_oper_params, 3541 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3542 3543 if (bss_conf->he_bss_color.enabled) 3544 changed |= BSS_CHANGED_HE_BSS_COLOR; 3545 3546 bss_conf->htc_trig_based_pkt_ext = 3547 le32_get_bits(elems->he_operation->he_oper_params, 3548 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3549 bss_conf->frame_time_rts_th = 3550 le32_get_bits(elems->he_operation->he_oper_params, 3551 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3552 3553 bss_conf->uora_exists = !!elems->uora_element; 3554 if (elems->uora_element) 3555 bss_conf->uora_ocw_range = elems->uora_element[0]; 3556 3557 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3558 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3559 /* TODO: OPEN: what happens if BSS color disable is set? */ 3560 } 3561 3562 if (cbss->transmitted_bss) { 3563 bss_conf->nontransmitted = true; 3564 ether_addr_copy(bss_conf->transmitter_bssid, 3565 cbss->transmitted_bss->bssid); 3566 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3567 bss_conf->bssid_index = cbss->bssid_index; 3568 } 3569 3570 /* 3571 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3572 * in their association response, so ignore that data for our own 3573 * configuration. If it changed since the last beacon, we'll get the 3574 * next beacon and update then. 3575 */ 3576 3577 /* 3578 * If an operating mode notification IE is present, override the 3579 * NSS calculation (that would be done in rate_control_rate_init()) 3580 * and use the # of streams from that element. 3581 */ 3582 if (elems->opmode_notif && 3583 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3584 u8 nss; 3585 3586 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3587 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3588 nss += 1; 3589 sta->sta.rx_nss = nss; 3590 } 3591 3592 rate_control_rate_init(sta); 3593 3594 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3595 set_sta_flag(sta, WLAN_STA_MFP); 3596 sta->sta.mfp = true; 3597 } else { 3598 sta->sta.mfp = false; 3599 } 3600 3601 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3602 local->hw.queues >= IEEE80211_NUM_ACS; 3603 3604 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3605 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3606 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3607 if (err) { 3608 sdata_info(sdata, 3609 "failed to move station %pM to desired state\n", 3610 sta->sta.addr); 3611 WARN_ON(__sta_info_destroy(sta)); 3612 mutex_unlock(&sdata->local->sta_mtx); 3613 ret = false; 3614 goto out; 3615 } 3616 3617 if (sdata->wdev.use_4addr) 3618 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3619 3620 mutex_unlock(&sdata->local->sta_mtx); 3621 3622 /* 3623 * Always handle WMM once after association regardless 3624 * of the first value the AP uses. Setting -1 here has 3625 * that effect because the AP values is an unsigned 3626 * 4-bit value. 3627 */ 3628 ifmgd->wmm_last_param_set = -1; 3629 ifmgd->mu_edca_last_param_set = -1; 3630 3631 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3632 ieee80211_set_wmm_default(sdata, false, false); 3633 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3634 elems->wmm_param_len, 3635 elems->mu_edca_param_set)) { 3636 /* still enable QoS since we might have HT/VHT */ 3637 ieee80211_set_wmm_default(sdata, false, true); 3638 /* set the disable-WMM flag in this case to disable 3639 * tracking WMM parameter changes in the beacon if 3640 * the parameters weren't actually valid. Doing so 3641 * avoids changing parameters very strangely when 3642 * the AP is going back and forth between valid and 3643 * invalid parameters. 3644 */ 3645 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3646 } 3647 changed |= BSS_CHANGED_QOS; 3648 3649 if (elems->max_idle_period_ie) { 3650 bss_conf->max_idle_period = 3651 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3652 bss_conf->protected_keep_alive = 3653 !!(elems->max_idle_period_ie->idle_options & 3654 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3655 changed |= BSS_CHANGED_KEEP_ALIVE; 3656 } else { 3657 bss_conf->max_idle_period = 0; 3658 bss_conf->protected_keep_alive = false; 3659 } 3660 3661 /* set assoc capability (AID was already set earlier), 3662 * ieee80211_set_associated() will tell the driver */ 3663 bss_conf->assoc_capability = capab_info; 3664 ieee80211_set_associated(sdata, cbss, changed); 3665 3666 /* 3667 * If we're using 4-addr mode, let the AP know that we're 3668 * doing so, so that it can create the STA VLAN on its side 3669 */ 3670 if (ifmgd->use_4addr) 3671 ieee80211_send_4addr_nullfunc(local, sdata); 3672 3673 /* 3674 * Start timer to probe the connection to the AP now. 3675 * Also start the timer that will detect beacon loss. 3676 */ 3677 ieee80211_sta_reset_beacon_monitor(sdata); 3678 ieee80211_sta_reset_conn_monitor(sdata); 3679 3680 ret = true; 3681 out: 3682 kfree(bss_ies); 3683 return ret; 3684 } 3685 3686 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3687 struct ieee80211_mgmt *mgmt, 3688 size_t len) 3689 { 3690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3691 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3692 u16 capab_info, status_code, aid; 3693 struct ieee802_11_elems elems; 3694 int ac, uapsd_queues = -1; 3695 u8 *pos; 3696 bool reassoc; 3697 struct cfg80211_bss *cbss; 3698 struct ieee80211_event event = { 3699 .type = MLME_EVENT, 3700 .u.mlme.data = ASSOC_EVENT, 3701 }; 3702 3703 sdata_assert_lock(sdata); 3704 3705 if (!assoc_data) 3706 return; 3707 3708 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3709 return; 3710 3711 cbss = assoc_data->bss; 3712 3713 /* 3714 * AssocResp and ReassocResp have identical structure, so process both 3715 * of them in this function. 3716 */ 3717 3718 if (len < 24 + 6) 3719 return; 3720 3721 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3722 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3723 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3724 pos = mgmt->u.assoc_resp.variable; 3725 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3726 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3727 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3728 aid = 0; /* TODO */ 3729 } 3730 3731 sdata_info(sdata, 3732 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3733 reassoc ? "Rea" : "A", mgmt->sa, 3734 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3735 3736 if (assoc_data->fils_kek_len && 3737 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3738 return; 3739 3740 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3741 mgmt->bssid, assoc_data->bss->bssid); 3742 3743 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3744 elems.timeout_int && 3745 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3746 u32 tu, ms; 3747 tu = le32_to_cpu(elems.timeout_int->value); 3748 ms = tu * 1024 / 1000; 3749 sdata_info(sdata, 3750 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3751 mgmt->sa, tu, ms); 3752 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3753 assoc_data->timeout_started = true; 3754 if (ms > IEEE80211_ASSOC_TIMEOUT) 3755 run_again(sdata, assoc_data->timeout); 3756 return; 3757 } 3758 3759 if (status_code != WLAN_STATUS_SUCCESS) { 3760 sdata_info(sdata, "%pM denied association (code=%d)\n", 3761 mgmt->sa, status_code); 3762 ieee80211_destroy_assoc_data(sdata, false, false); 3763 event.u.mlme.status = MLME_DENIED; 3764 event.u.mlme.reason = status_code; 3765 drv_event_callback(sdata->local, sdata, &event); 3766 } else { 3767 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) { 3768 /* oops -- internal error -- send timeout for now */ 3769 ieee80211_destroy_assoc_data(sdata, false, false); 3770 cfg80211_assoc_timeout(sdata->dev, cbss); 3771 return; 3772 } 3773 event.u.mlme.status = MLME_SUCCESS; 3774 drv_event_callback(sdata->local, sdata, &event); 3775 sdata_info(sdata, "associated\n"); 3776 3777 /* 3778 * destroy assoc_data afterwards, as otherwise an idle 3779 * recalc after assoc_data is NULL but before associated 3780 * is set can cause the interface to go idle 3781 */ 3782 ieee80211_destroy_assoc_data(sdata, true, false); 3783 3784 /* get uapsd queues configuration */ 3785 uapsd_queues = 0; 3786 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3787 if (sdata->tx_conf[ac].uapsd) 3788 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3789 } 3790 3791 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3792 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3793 } 3794 3795 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3796 struct ieee80211_mgmt *mgmt, size_t len, 3797 struct ieee80211_rx_status *rx_status) 3798 { 3799 struct ieee80211_local *local = sdata->local; 3800 struct ieee80211_bss *bss; 3801 struct ieee80211_channel *channel; 3802 3803 sdata_assert_lock(sdata); 3804 3805 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3806 ieee80211_rx_status_to_khz(rx_status)); 3807 if (!channel) 3808 return; 3809 3810 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3811 if (bss) { 3812 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3813 ieee80211_rx_bss_put(local, bss); 3814 } 3815 } 3816 3817 3818 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3819 struct sk_buff *skb) 3820 { 3821 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3822 struct ieee80211_if_managed *ifmgd; 3823 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3824 struct ieee80211_channel *channel; 3825 size_t baselen, len = skb->len; 3826 3827 ifmgd = &sdata->u.mgd; 3828 3829 sdata_assert_lock(sdata); 3830 3831 /* 3832 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3833 * "If a 6 GHz AP receives a Probe Request frame and responds with 3834 * a Probe Response frame [..], the Address 1 field of the Probe 3835 * Response frame shall be set to the broadcast address [..]" 3836 * So, on 6GHz band we should also accept broadcast responses. 3837 */ 3838 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3839 rx_status->freq); 3840 if (!channel) 3841 return; 3842 3843 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3844 (channel->band != NL80211_BAND_6GHZ || 3845 !is_broadcast_ether_addr(mgmt->da))) 3846 return; /* ignore ProbeResp to foreign address */ 3847 3848 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3849 if (baselen > len) 3850 return; 3851 3852 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3853 3854 if (ifmgd->associated && 3855 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3856 ieee80211_reset_ap_probe(sdata); 3857 } 3858 3859 /* 3860 * This is the canonical list of information elements we care about, 3861 * the filter code also gives us all changes to the Microsoft OUI 3862 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3863 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3864 * changes to requested client power. 3865 * 3866 * We implement beacon filtering in software since that means we can 3867 * avoid processing the frame here and in cfg80211, and userspace 3868 * will not be able to tell whether the hardware supports it or not. 3869 * 3870 * XXX: This list needs to be dynamic -- userspace needs to be able to 3871 * add items it requires. It also needs to be able to tell us to 3872 * look out for other vendor IEs. 3873 */ 3874 static const u64 care_about_ies = 3875 (1ULL << WLAN_EID_COUNTRY) | 3876 (1ULL << WLAN_EID_ERP_INFO) | 3877 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3878 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3879 (1ULL << WLAN_EID_HT_CAPABILITY) | 3880 (1ULL << WLAN_EID_HT_OPERATION) | 3881 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3882 3883 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3884 struct ieee80211_if_managed *ifmgd, 3885 struct ieee80211_bss_conf *bss_conf, 3886 struct ieee80211_local *local, 3887 struct ieee80211_rx_status *rx_status) 3888 { 3889 /* Track average RSSI from the Beacon frames of the current AP */ 3890 3891 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3892 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3893 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3894 ifmgd->last_cqm_event_signal = 0; 3895 ifmgd->count_beacon_signal = 1; 3896 ifmgd->last_ave_beacon_signal = 0; 3897 } else { 3898 ifmgd->count_beacon_signal++; 3899 } 3900 3901 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3902 3903 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3904 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3905 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3906 int last_sig = ifmgd->last_ave_beacon_signal; 3907 struct ieee80211_event event = { 3908 .type = RSSI_EVENT, 3909 }; 3910 3911 /* 3912 * if signal crosses either of the boundaries, invoke callback 3913 * with appropriate parameters 3914 */ 3915 if (sig > ifmgd->rssi_max_thold && 3916 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3917 ifmgd->last_ave_beacon_signal = sig; 3918 event.u.rssi.data = RSSI_EVENT_HIGH; 3919 drv_event_callback(local, sdata, &event); 3920 } else if (sig < ifmgd->rssi_min_thold && 3921 (last_sig >= ifmgd->rssi_max_thold || 3922 last_sig == 0)) { 3923 ifmgd->last_ave_beacon_signal = sig; 3924 event.u.rssi.data = RSSI_EVENT_LOW; 3925 drv_event_callback(local, sdata, &event); 3926 } 3927 } 3928 3929 if (bss_conf->cqm_rssi_thold && 3930 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3931 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3932 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3933 int last_event = ifmgd->last_cqm_event_signal; 3934 int thold = bss_conf->cqm_rssi_thold; 3935 int hyst = bss_conf->cqm_rssi_hyst; 3936 3937 if (sig < thold && 3938 (last_event == 0 || sig < last_event - hyst)) { 3939 ifmgd->last_cqm_event_signal = sig; 3940 ieee80211_cqm_rssi_notify( 3941 &sdata->vif, 3942 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3943 sig, GFP_KERNEL); 3944 } else if (sig > thold && 3945 (last_event == 0 || sig > last_event + hyst)) { 3946 ifmgd->last_cqm_event_signal = sig; 3947 ieee80211_cqm_rssi_notify( 3948 &sdata->vif, 3949 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3950 sig, GFP_KERNEL); 3951 } 3952 } 3953 3954 if (bss_conf->cqm_rssi_low && 3955 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3956 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3957 int last_event = ifmgd->last_cqm_event_signal; 3958 int low = bss_conf->cqm_rssi_low; 3959 int high = bss_conf->cqm_rssi_high; 3960 3961 if (sig < low && 3962 (last_event == 0 || last_event >= low)) { 3963 ifmgd->last_cqm_event_signal = sig; 3964 ieee80211_cqm_rssi_notify( 3965 &sdata->vif, 3966 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3967 sig, GFP_KERNEL); 3968 } else if (sig > high && 3969 (last_event == 0 || last_event <= high)) { 3970 ifmgd->last_cqm_event_signal = sig; 3971 ieee80211_cqm_rssi_notify( 3972 &sdata->vif, 3973 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3974 sig, GFP_KERNEL); 3975 } 3976 } 3977 } 3978 3979 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3980 struct cfg80211_bss *bss) 3981 { 3982 if (ether_addr_equal(tx_bssid, bss->bssid)) 3983 return true; 3984 if (!bss->transmitted_bss) 3985 return false; 3986 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3987 } 3988 3989 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3990 struct ieee80211_hdr *hdr, size_t len, 3991 struct ieee80211_rx_status *rx_status) 3992 { 3993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3994 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3995 struct ieee80211_mgmt *mgmt = (void *) hdr; 3996 size_t baselen; 3997 struct ieee802_11_elems elems; 3998 struct ieee80211_local *local = sdata->local; 3999 struct ieee80211_chanctx_conf *chanctx_conf; 4000 struct ieee80211_channel *chan; 4001 struct sta_info *sta; 4002 u32 changed = 0; 4003 bool erp_valid; 4004 u8 erp_value = 0; 4005 u32 ncrc = 0; 4006 u8 *bssid, *variable = mgmt->u.beacon.variable; 4007 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4008 4009 sdata_assert_lock(sdata); 4010 4011 /* Process beacon from the current BSS */ 4012 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4013 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4014 struct ieee80211_ext *ext = (void *) mgmt; 4015 4016 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4017 variable = ext->u.s1g_short_beacon.variable; 4018 else 4019 variable = ext->u.s1g_beacon.variable; 4020 } 4021 4022 baselen = (u8 *) variable - (u8 *) mgmt; 4023 if (baselen > len) 4024 return; 4025 4026 rcu_read_lock(); 4027 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4028 if (!chanctx_conf) { 4029 rcu_read_unlock(); 4030 return; 4031 } 4032 4033 if (ieee80211_rx_status_to_khz(rx_status) != 4034 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4035 rcu_read_unlock(); 4036 return; 4037 } 4038 chan = chanctx_conf->def.chan; 4039 rcu_read_unlock(); 4040 4041 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4042 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4043 ieee802_11_parse_elems(variable, 4044 len - baselen, false, &elems, 4045 bssid, 4046 ifmgd->assoc_data->bss->bssid); 4047 4048 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4049 4050 if (elems.dtim_period) 4051 ifmgd->dtim_period = elems.dtim_period; 4052 ifmgd->have_beacon = true; 4053 ifmgd->assoc_data->need_beacon = false; 4054 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4055 sdata->vif.bss_conf.sync_tsf = 4056 le64_to_cpu(mgmt->u.beacon.timestamp); 4057 sdata->vif.bss_conf.sync_device_ts = 4058 rx_status->device_timestamp; 4059 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4060 } 4061 4062 if (elems.mbssid_config_ie) 4063 bss_conf->profile_periodicity = 4064 elems.mbssid_config_ie->profile_periodicity; 4065 else 4066 bss_conf->profile_periodicity = 0; 4067 4068 if (elems.ext_capab_len >= 11 && 4069 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4070 bss_conf->ema_ap = true; 4071 else 4072 bss_conf->ema_ap = false; 4073 4074 /* continue assoc process */ 4075 ifmgd->assoc_data->timeout = jiffies; 4076 ifmgd->assoc_data->timeout_started = true; 4077 run_again(sdata, ifmgd->assoc_data->timeout); 4078 return; 4079 } 4080 4081 if (!ifmgd->associated || 4082 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4083 return; 4084 bssid = ifmgd->associated->bssid; 4085 4086 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4087 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4088 local, rx_status); 4089 4090 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4091 mlme_dbg_ratelimited(sdata, 4092 "cancelling AP probe due to a received beacon\n"); 4093 ieee80211_reset_ap_probe(sdata); 4094 } 4095 4096 /* 4097 * Push the beacon loss detection into the future since 4098 * we are processing a beacon from the AP just now. 4099 */ 4100 ieee80211_sta_reset_beacon_monitor(sdata); 4101 4102 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4103 * element (which carries the beacon interval). Don't forget to add a 4104 * bit to care_about_ies[] above if mac80211 is interested in a 4105 * changing S1G element. 4106 */ 4107 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4108 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4109 ncrc = ieee802_11_parse_elems_crc(variable, 4110 len - baselen, false, &elems, 4111 care_about_ies, ncrc, 4112 mgmt->bssid, bssid); 4113 4114 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4115 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 4116 if (local->hw.conf.dynamic_ps_timeout > 0) { 4117 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4118 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4119 ieee80211_hw_config(local, 4120 IEEE80211_CONF_CHANGE_PS); 4121 } 4122 ieee80211_send_nullfunc(local, sdata, false); 4123 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4124 local->pspolling = true; 4125 4126 /* 4127 * Here is assumed that the driver will be 4128 * able to send ps-poll frame and receive a 4129 * response even though power save mode is 4130 * enabled, but some drivers might require 4131 * to disable power save here. This needs 4132 * to be investigated. 4133 */ 4134 ieee80211_send_pspoll(local, sdata); 4135 } 4136 } 4137 4138 if (sdata->vif.p2p || 4139 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4140 struct ieee80211_p2p_noa_attr noa = {}; 4141 int ret; 4142 4143 ret = cfg80211_get_p2p_attr(variable, 4144 len - baselen, 4145 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4146 (u8 *) &noa, sizeof(noa)); 4147 if (ret >= 2) { 4148 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4149 /* valid noa_attr and index changed */ 4150 sdata->u.mgd.p2p_noa_index = noa.index; 4151 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4152 changed |= BSS_CHANGED_P2P_PS; 4153 /* 4154 * make sure we update all information, the CRC 4155 * mechanism doesn't look at P2P attributes. 4156 */ 4157 ifmgd->beacon_crc_valid = false; 4158 } 4159 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4160 /* noa_attr not found and we had valid noa_attr before */ 4161 sdata->u.mgd.p2p_noa_index = -1; 4162 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4163 changed |= BSS_CHANGED_P2P_PS; 4164 ifmgd->beacon_crc_valid = false; 4165 } 4166 } 4167 4168 if (ifmgd->csa_waiting_bcn) 4169 ieee80211_chswitch_post_beacon(sdata); 4170 4171 /* 4172 * Update beacon timing and dtim count on every beacon appearance. This 4173 * will allow the driver to use the most updated values. Do it before 4174 * comparing this one with last received beacon. 4175 * IMPORTANT: These parameters would possibly be out of sync by the time 4176 * the driver will use them. The synchronized view is currently 4177 * guaranteed only in certain callbacks. 4178 */ 4179 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4180 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4181 sdata->vif.bss_conf.sync_tsf = 4182 le64_to_cpu(mgmt->u.beacon.timestamp); 4183 sdata->vif.bss_conf.sync_device_ts = 4184 rx_status->device_timestamp; 4185 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4186 } 4187 4188 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4189 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4190 return; 4191 ifmgd->beacon_crc = ncrc; 4192 ifmgd->beacon_crc_valid = true; 4193 4194 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4195 4196 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4197 rx_status->device_timestamp, 4198 &elems, true); 4199 4200 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4201 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4202 elems.wmm_param_len, 4203 elems.mu_edca_param_set)) 4204 changed |= BSS_CHANGED_QOS; 4205 4206 /* 4207 * If we haven't had a beacon before, tell the driver about the 4208 * DTIM period (and beacon timing if desired) now. 4209 */ 4210 if (!ifmgd->have_beacon) { 4211 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4212 bss_conf->dtim_period = elems.dtim_period ?: 1; 4213 4214 changed |= BSS_CHANGED_BEACON_INFO; 4215 ifmgd->have_beacon = true; 4216 4217 mutex_lock(&local->iflist_mtx); 4218 ieee80211_recalc_ps(local); 4219 mutex_unlock(&local->iflist_mtx); 4220 4221 ieee80211_recalc_ps_vif(sdata); 4222 } 4223 4224 if (elems.erp_info) { 4225 erp_valid = true; 4226 erp_value = elems.erp_info[0]; 4227 } else { 4228 erp_valid = false; 4229 } 4230 4231 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4232 changed |= ieee80211_handle_bss_capability(sdata, 4233 le16_to_cpu(mgmt->u.beacon.capab_info), 4234 erp_valid, erp_value); 4235 4236 mutex_lock(&local->sta_mtx); 4237 sta = sta_info_get(sdata, bssid); 4238 4239 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4240 4241 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4242 elems.vht_cap_elem, elems.ht_operation, 4243 elems.vht_operation, elems.he_operation, 4244 elems.s1g_oper, bssid, &changed)) { 4245 mutex_unlock(&local->sta_mtx); 4246 sdata_info(sdata, 4247 "failed to follow AP %pM bandwidth change, disconnect\n", 4248 bssid); 4249 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4250 WLAN_REASON_DEAUTH_LEAVING, 4251 true, deauth_buf); 4252 ieee80211_report_disconnect(sdata, deauth_buf, 4253 sizeof(deauth_buf), true, 4254 WLAN_REASON_DEAUTH_LEAVING, 4255 false); 4256 return; 4257 } 4258 4259 if (sta && elems.opmode_notif) 4260 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4261 rx_status->band); 4262 mutex_unlock(&local->sta_mtx); 4263 4264 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4265 elems.country_elem, 4266 elems.country_elem_len, 4267 elems.pwr_constr_elem, 4268 elems.cisco_dtpc_elem); 4269 4270 ieee80211_bss_info_change_notify(sdata, changed); 4271 } 4272 4273 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4274 struct sk_buff *skb) 4275 { 4276 struct ieee80211_rx_status *rx_status; 4277 struct ieee80211_hdr *hdr; 4278 u16 fc; 4279 4280 rx_status = (struct ieee80211_rx_status *) skb->cb; 4281 hdr = (struct ieee80211_hdr *) skb->data; 4282 fc = le16_to_cpu(hdr->frame_control); 4283 4284 sdata_lock(sdata); 4285 switch (fc & IEEE80211_FCTL_STYPE) { 4286 case IEEE80211_STYPE_S1G_BEACON: 4287 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4288 break; 4289 } 4290 sdata_unlock(sdata); 4291 } 4292 4293 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4294 struct sk_buff *skb) 4295 { 4296 struct ieee80211_rx_status *rx_status; 4297 struct ieee80211_mgmt *mgmt; 4298 u16 fc; 4299 struct ieee802_11_elems elems; 4300 int ies_len; 4301 4302 rx_status = (struct ieee80211_rx_status *) skb->cb; 4303 mgmt = (struct ieee80211_mgmt *) skb->data; 4304 fc = le16_to_cpu(mgmt->frame_control); 4305 4306 sdata_lock(sdata); 4307 4308 switch (fc & IEEE80211_FCTL_STYPE) { 4309 case IEEE80211_STYPE_BEACON: 4310 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4311 skb->len, rx_status); 4312 break; 4313 case IEEE80211_STYPE_PROBE_RESP: 4314 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4315 break; 4316 case IEEE80211_STYPE_AUTH: 4317 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4318 break; 4319 case IEEE80211_STYPE_DEAUTH: 4320 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4321 break; 4322 case IEEE80211_STYPE_DISASSOC: 4323 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4324 break; 4325 case IEEE80211_STYPE_ASSOC_RESP: 4326 case IEEE80211_STYPE_REASSOC_RESP: 4327 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4328 break; 4329 case IEEE80211_STYPE_ACTION: 4330 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4331 ies_len = skb->len - 4332 offsetof(struct ieee80211_mgmt, 4333 u.action.u.chan_switch.variable); 4334 4335 if (ies_len < 0) 4336 break; 4337 4338 /* CSA IE cannot be overridden, no need for BSSID */ 4339 ieee802_11_parse_elems( 4340 mgmt->u.action.u.chan_switch.variable, 4341 ies_len, true, &elems, mgmt->bssid, NULL); 4342 4343 if (elems.parse_error) 4344 break; 4345 4346 ieee80211_sta_process_chanswitch(sdata, 4347 rx_status->mactime, 4348 rx_status->device_timestamp, 4349 &elems, false); 4350 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4351 ies_len = skb->len - 4352 offsetof(struct ieee80211_mgmt, 4353 u.action.u.ext_chan_switch.variable); 4354 4355 if (ies_len < 0) 4356 break; 4357 4358 /* 4359 * extended CSA IE can't be overridden, no need for 4360 * BSSID 4361 */ 4362 ieee802_11_parse_elems( 4363 mgmt->u.action.u.ext_chan_switch.variable, 4364 ies_len, true, &elems, mgmt->bssid, NULL); 4365 4366 if (elems.parse_error) 4367 break; 4368 4369 /* for the handling code pretend this was also an IE */ 4370 elems.ext_chansw_ie = 4371 &mgmt->u.action.u.ext_chan_switch.data; 4372 4373 ieee80211_sta_process_chanswitch(sdata, 4374 rx_status->mactime, 4375 rx_status->device_timestamp, 4376 &elems, false); 4377 } 4378 break; 4379 } 4380 sdata_unlock(sdata); 4381 } 4382 4383 static void ieee80211_sta_timer(struct timer_list *t) 4384 { 4385 struct ieee80211_sub_if_data *sdata = 4386 from_timer(sdata, t, u.mgd.timer); 4387 4388 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4389 } 4390 4391 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4392 u8 *bssid, u8 reason, bool tx) 4393 { 4394 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4395 4396 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4397 tx, frame_buf); 4398 4399 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4400 reason, false); 4401 } 4402 4403 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4404 { 4405 struct ieee80211_local *local = sdata->local; 4406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4407 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4408 u32 tx_flags = 0; 4409 u16 trans = 1; 4410 u16 status = 0; 4411 u16 prepare_tx_duration = 0; 4412 4413 sdata_assert_lock(sdata); 4414 4415 if (WARN_ON_ONCE(!auth_data)) 4416 return -EINVAL; 4417 4418 auth_data->tries++; 4419 4420 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4421 sdata_info(sdata, "authentication with %pM timed out\n", 4422 auth_data->bss->bssid); 4423 4424 /* 4425 * Most likely AP is not in the range so remove the 4426 * bss struct for that AP. 4427 */ 4428 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4429 4430 return -ETIMEDOUT; 4431 } 4432 4433 if (auth_data->algorithm == WLAN_AUTH_SAE) 4434 prepare_tx_duration = 4435 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4436 4437 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4438 4439 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4440 auth_data->bss->bssid, auth_data->tries, 4441 IEEE80211_AUTH_MAX_TRIES); 4442 4443 auth_data->expected_transaction = 2; 4444 4445 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4446 trans = auth_data->sae_trans; 4447 status = auth_data->sae_status; 4448 auth_data->expected_transaction = trans; 4449 } 4450 4451 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4452 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4453 IEEE80211_TX_INTFL_MLME_CONN_TX; 4454 4455 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4456 auth_data->data, auth_data->data_len, 4457 auth_data->bss->bssid, 4458 auth_data->bss->bssid, NULL, 0, 0, 4459 tx_flags); 4460 4461 if (tx_flags == 0) { 4462 if (auth_data->algorithm == WLAN_AUTH_SAE) 4463 auth_data->timeout = jiffies + 4464 IEEE80211_AUTH_TIMEOUT_SAE; 4465 else 4466 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4467 } else { 4468 auth_data->timeout = 4469 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4470 } 4471 4472 auth_data->timeout_started = true; 4473 run_again(sdata, auth_data->timeout); 4474 4475 return 0; 4476 } 4477 4478 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4479 { 4480 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4481 struct ieee80211_local *local = sdata->local; 4482 4483 sdata_assert_lock(sdata); 4484 4485 assoc_data->tries++; 4486 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4487 sdata_info(sdata, "association with %pM timed out\n", 4488 assoc_data->bss->bssid); 4489 4490 /* 4491 * Most likely AP is not in the range so remove the 4492 * bss struct for that AP. 4493 */ 4494 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4495 4496 return -ETIMEDOUT; 4497 } 4498 4499 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4500 assoc_data->bss->bssid, assoc_data->tries, 4501 IEEE80211_ASSOC_MAX_TRIES); 4502 ieee80211_send_assoc(sdata); 4503 4504 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4505 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4506 assoc_data->timeout_started = true; 4507 run_again(sdata, assoc_data->timeout); 4508 } else { 4509 assoc_data->timeout = 4510 round_jiffies_up(jiffies + 4511 IEEE80211_ASSOC_TIMEOUT_LONG); 4512 assoc_data->timeout_started = true; 4513 run_again(sdata, assoc_data->timeout); 4514 } 4515 4516 return 0; 4517 } 4518 4519 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4520 __le16 fc, bool acked) 4521 { 4522 struct ieee80211_local *local = sdata->local; 4523 4524 sdata->u.mgd.status_fc = fc; 4525 sdata->u.mgd.status_acked = acked; 4526 sdata->u.mgd.status_received = true; 4527 4528 ieee80211_queue_work(&local->hw, &sdata->work); 4529 } 4530 4531 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4532 { 4533 struct ieee80211_local *local = sdata->local; 4534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4535 4536 sdata_lock(sdata); 4537 4538 if (ifmgd->status_received) { 4539 __le16 fc = ifmgd->status_fc; 4540 bool status_acked = ifmgd->status_acked; 4541 4542 ifmgd->status_received = false; 4543 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4544 if (status_acked) { 4545 if (ifmgd->auth_data->algorithm == 4546 WLAN_AUTH_SAE) 4547 ifmgd->auth_data->timeout = 4548 jiffies + 4549 IEEE80211_AUTH_TIMEOUT_SAE; 4550 else 4551 ifmgd->auth_data->timeout = 4552 jiffies + 4553 IEEE80211_AUTH_TIMEOUT_SHORT; 4554 run_again(sdata, ifmgd->auth_data->timeout); 4555 } else { 4556 ifmgd->auth_data->timeout = jiffies - 1; 4557 } 4558 ifmgd->auth_data->timeout_started = true; 4559 } else if (ifmgd->assoc_data && 4560 (ieee80211_is_assoc_req(fc) || 4561 ieee80211_is_reassoc_req(fc))) { 4562 if (status_acked) { 4563 ifmgd->assoc_data->timeout = 4564 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4565 run_again(sdata, ifmgd->assoc_data->timeout); 4566 } else { 4567 ifmgd->assoc_data->timeout = jiffies - 1; 4568 } 4569 ifmgd->assoc_data->timeout_started = true; 4570 } 4571 } 4572 4573 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4574 time_after(jiffies, ifmgd->auth_data->timeout)) { 4575 if (ifmgd->auth_data->done) { 4576 /* 4577 * ok ... we waited for assoc but userspace didn't, 4578 * so let's just kill the auth data 4579 */ 4580 ieee80211_destroy_auth_data(sdata, false); 4581 } else if (ieee80211_auth(sdata)) { 4582 u8 bssid[ETH_ALEN]; 4583 struct ieee80211_event event = { 4584 .type = MLME_EVENT, 4585 .u.mlme.data = AUTH_EVENT, 4586 .u.mlme.status = MLME_TIMEOUT, 4587 }; 4588 4589 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4590 4591 ieee80211_destroy_auth_data(sdata, false); 4592 4593 cfg80211_auth_timeout(sdata->dev, bssid); 4594 drv_event_callback(sdata->local, sdata, &event); 4595 } 4596 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4597 run_again(sdata, ifmgd->auth_data->timeout); 4598 4599 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4600 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4601 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4602 ieee80211_do_assoc(sdata)) { 4603 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4604 struct ieee80211_event event = { 4605 .type = MLME_EVENT, 4606 .u.mlme.data = ASSOC_EVENT, 4607 .u.mlme.status = MLME_TIMEOUT, 4608 }; 4609 4610 ieee80211_destroy_assoc_data(sdata, false, false); 4611 cfg80211_assoc_timeout(sdata->dev, bss); 4612 drv_event_callback(sdata->local, sdata, &event); 4613 } 4614 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4615 run_again(sdata, ifmgd->assoc_data->timeout); 4616 4617 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4618 ifmgd->associated) { 4619 u8 bssid[ETH_ALEN]; 4620 int max_tries; 4621 4622 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4623 4624 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4625 max_tries = max_nullfunc_tries; 4626 else 4627 max_tries = max_probe_tries; 4628 4629 /* ACK received for nullfunc probing frame */ 4630 if (!ifmgd->probe_send_count) 4631 ieee80211_reset_ap_probe(sdata); 4632 else if (ifmgd->nullfunc_failed) { 4633 if (ifmgd->probe_send_count < max_tries) { 4634 mlme_dbg(sdata, 4635 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4636 bssid, ifmgd->probe_send_count, 4637 max_tries); 4638 ieee80211_mgd_probe_ap_send(sdata); 4639 } else { 4640 mlme_dbg(sdata, 4641 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4642 bssid); 4643 ieee80211_sta_connection_lost(sdata, bssid, 4644 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4645 false); 4646 } 4647 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4648 run_again(sdata, ifmgd->probe_timeout); 4649 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4650 mlme_dbg(sdata, 4651 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4652 bssid, probe_wait_ms); 4653 ieee80211_sta_connection_lost(sdata, bssid, 4654 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4655 } else if (ifmgd->probe_send_count < max_tries) { 4656 mlme_dbg(sdata, 4657 "No probe response from AP %pM after %dms, try %d/%i\n", 4658 bssid, probe_wait_ms, 4659 ifmgd->probe_send_count, max_tries); 4660 ieee80211_mgd_probe_ap_send(sdata); 4661 } else { 4662 /* 4663 * We actually lost the connection ... or did we? 4664 * Let's make sure! 4665 */ 4666 mlme_dbg(sdata, 4667 "No probe response from AP %pM after %dms, disconnecting.\n", 4668 bssid, probe_wait_ms); 4669 4670 ieee80211_sta_connection_lost(sdata, bssid, 4671 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4672 } 4673 } 4674 4675 sdata_unlock(sdata); 4676 } 4677 4678 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4679 { 4680 struct ieee80211_sub_if_data *sdata = 4681 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4683 4684 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4685 return; 4686 4687 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4688 return; 4689 4690 sdata->u.mgd.connection_loss = false; 4691 ieee80211_queue_work(&sdata->local->hw, 4692 &sdata->u.mgd.beacon_connection_loss_work); 4693 } 4694 4695 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4696 { 4697 struct ieee80211_sub_if_data *sdata = 4698 from_timer(sdata, t, u.mgd.conn_mon_timer); 4699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4700 struct ieee80211_local *local = sdata->local; 4701 struct sta_info *sta; 4702 unsigned long timeout; 4703 4704 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4705 return; 4706 4707 sta = sta_info_get(sdata, ifmgd->bssid); 4708 if (!sta) 4709 return; 4710 4711 timeout = sta->status_stats.last_ack; 4712 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4713 timeout = sta->rx_stats.last_rx; 4714 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4715 4716 /* If timeout is after now, then update timer to fire at 4717 * the later date, but do not actually probe at this time. 4718 */ 4719 if (time_is_after_jiffies(timeout)) { 4720 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4721 return; 4722 } 4723 4724 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4725 } 4726 4727 static void ieee80211_sta_monitor_work(struct work_struct *work) 4728 { 4729 struct ieee80211_sub_if_data *sdata = 4730 container_of(work, struct ieee80211_sub_if_data, 4731 u.mgd.monitor_work); 4732 4733 ieee80211_mgd_probe_ap(sdata, false); 4734 } 4735 4736 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4737 { 4738 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4739 __ieee80211_stop_poll(sdata); 4740 4741 /* let's probe the connection once */ 4742 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4743 ieee80211_queue_work(&sdata->local->hw, 4744 &sdata->u.mgd.monitor_work); 4745 } 4746 } 4747 4748 #ifdef CONFIG_PM 4749 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4750 { 4751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4752 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4753 4754 sdata_lock(sdata); 4755 4756 if (ifmgd->auth_data || ifmgd->assoc_data) { 4757 const u8 *bssid = ifmgd->auth_data ? 4758 ifmgd->auth_data->bss->bssid : 4759 ifmgd->assoc_data->bss->bssid; 4760 4761 /* 4762 * If we are trying to authenticate / associate while suspending, 4763 * cfg80211 won't know and won't actually abort those attempts, 4764 * thus we need to do that ourselves. 4765 */ 4766 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4767 IEEE80211_STYPE_DEAUTH, 4768 WLAN_REASON_DEAUTH_LEAVING, 4769 false, frame_buf); 4770 if (ifmgd->assoc_data) 4771 ieee80211_destroy_assoc_data(sdata, false, true); 4772 if (ifmgd->auth_data) 4773 ieee80211_destroy_auth_data(sdata, false); 4774 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4775 IEEE80211_DEAUTH_FRAME_LEN, 4776 false); 4777 } 4778 4779 /* This is a bit of a hack - we should find a better and more generic 4780 * solution to this. Normally when suspending, cfg80211 will in fact 4781 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4782 * auth (not so important) or assoc (this is the problem) process. 4783 * 4784 * As a consequence, it can happen that we are in the process of both 4785 * associating and suspending, and receive an association response 4786 * after cfg80211 has checked if it needs to disconnect, but before 4787 * we actually set the flag to drop incoming frames. This will then 4788 * cause the workqueue flush to process the association response in 4789 * the suspend, resulting in a successful association just before it 4790 * tries to remove the interface from the driver, which now though 4791 * has a channel context assigned ... this results in issues. 4792 * 4793 * To work around this (for now) simply deauth here again if we're 4794 * now connected. 4795 */ 4796 if (ifmgd->associated && !sdata->local->wowlan) { 4797 u8 bssid[ETH_ALEN]; 4798 struct cfg80211_deauth_request req = { 4799 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4800 .bssid = bssid, 4801 }; 4802 4803 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4804 ieee80211_mgd_deauth(sdata, &req); 4805 } 4806 4807 sdata_unlock(sdata); 4808 } 4809 4810 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4811 { 4812 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4813 4814 sdata_lock(sdata); 4815 if (!ifmgd->associated) { 4816 sdata_unlock(sdata); 4817 return; 4818 } 4819 4820 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4821 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4822 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4823 ieee80211_sta_connection_lost(sdata, 4824 ifmgd->associated->bssid, 4825 WLAN_REASON_UNSPECIFIED, 4826 true); 4827 sdata_unlock(sdata); 4828 return; 4829 } 4830 sdata_unlock(sdata); 4831 } 4832 #endif 4833 4834 /* interface setup */ 4835 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4836 { 4837 struct ieee80211_if_managed *ifmgd; 4838 4839 ifmgd = &sdata->u.mgd; 4840 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4841 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4842 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4843 ieee80211_beacon_connection_loss_work); 4844 INIT_WORK(&ifmgd->csa_connection_drop_work, 4845 ieee80211_csa_connection_drop_work); 4846 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4847 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4848 ieee80211_tdls_peer_del_work); 4849 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4850 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4851 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4852 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4853 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4854 ieee80211_sta_handle_tspec_ac_params_wk); 4855 4856 ifmgd->flags = 0; 4857 ifmgd->powersave = sdata->wdev.ps; 4858 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4859 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4860 ifmgd->p2p_noa_index = -1; 4861 4862 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4863 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4864 else 4865 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4866 4867 /* Setup TDLS data */ 4868 spin_lock_init(&ifmgd->teardown_lock); 4869 ifmgd->teardown_skb = NULL; 4870 ifmgd->orig_teardown_skb = NULL; 4871 } 4872 4873 /* scan finished notification */ 4874 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4875 { 4876 struct ieee80211_sub_if_data *sdata; 4877 4878 /* Restart STA timers */ 4879 rcu_read_lock(); 4880 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4881 if (ieee80211_sdata_running(sdata)) 4882 ieee80211_restart_sta_timer(sdata); 4883 } 4884 rcu_read_unlock(); 4885 } 4886 4887 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4888 struct cfg80211_bss *cbss) 4889 { 4890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4891 const u8 *ht_cap_ie, *vht_cap_ie; 4892 const struct ieee80211_ht_cap *ht_cap; 4893 const struct ieee80211_vht_cap *vht_cap; 4894 u8 chains = 1; 4895 4896 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4897 return chains; 4898 4899 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4900 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4901 ht_cap = (void *)(ht_cap_ie + 2); 4902 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4903 /* 4904 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4905 * "Tx Unequal Modulation Supported" fields. 4906 */ 4907 } 4908 4909 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4910 return chains; 4911 4912 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4913 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4914 u8 nss; 4915 u16 tx_mcs_map; 4916 4917 vht_cap = (void *)(vht_cap_ie + 2); 4918 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4919 for (nss = 8; nss > 0; nss--) { 4920 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4921 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4922 break; 4923 } 4924 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4925 chains = max(chains, nss); 4926 } 4927 4928 return chains; 4929 } 4930 4931 static bool 4932 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4933 const struct ieee80211_he_operation *he_op) 4934 { 4935 const struct ieee80211_sta_he_cap *sta_he_cap = 4936 ieee80211_get_he_sta_cap(sband); 4937 u16 ap_min_req_set; 4938 int i; 4939 4940 if (!sta_he_cap || !he_op) 4941 return false; 4942 4943 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4944 4945 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4946 for (i = 0; i < 3; i++) { 4947 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4948 &sta_he_cap->he_mcs_nss_supp; 4949 u16 sta_mcs_map_rx = 4950 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4951 u16 sta_mcs_map_tx = 4952 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4953 u8 nss; 4954 bool verified = true; 4955 4956 /* 4957 * For each band there is a maximum of 8 spatial streams 4958 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4959 * of 2 bits per NSS (1-8), with the values defined in enum 4960 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4961 * capabilities aren't less than the AP's minimum requirements 4962 * for this HE BSS per SS. 4963 * It is enough to find one such band that meets the reqs. 4964 */ 4965 for (nss = 8; nss > 0; nss--) { 4966 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4967 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4968 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4969 4970 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4971 continue; 4972 4973 /* 4974 * Make sure the HE AP doesn't require MCSs that aren't 4975 * supported by the client 4976 */ 4977 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4978 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4979 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4980 verified = false; 4981 break; 4982 } 4983 } 4984 4985 if (verified) 4986 return true; 4987 } 4988 4989 /* If here, STA doesn't meet AP's HE min requirements */ 4990 return false; 4991 } 4992 4993 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4994 struct cfg80211_bss *cbss) 4995 { 4996 struct ieee80211_local *local = sdata->local; 4997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4998 const struct ieee80211_ht_cap *ht_cap = NULL; 4999 const struct ieee80211_ht_operation *ht_oper = NULL; 5000 const struct ieee80211_vht_operation *vht_oper = NULL; 5001 const struct ieee80211_he_operation *he_oper = NULL; 5002 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5003 struct ieee80211_supported_band *sband; 5004 struct cfg80211_chan_def chandef; 5005 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5006 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5007 struct ieee80211_bss *bss = (void *)cbss->priv; 5008 int ret; 5009 u32 i; 5010 bool have_80mhz; 5011 5012 sband = local->hw.wiphy->bands[cbss->channel->band]; 5013 5014 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5015 IEEE80211_STA_DISABLE_80P80MHZ | 5016 IEEE80211_STA_DISABLE_160MHZ); 5017 5018 /* disable HT/VHT/HE if we don't support them */ 5019 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5020 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5021 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5022 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5023 } 5024 5025 if (!sband->vht_cap.vht_supported && is_5ghz) { 5026 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5027 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5028 } 5029 5030 if (!ieee80211_get_he_sta_cap(sband)) 5031 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5032 5033 rcu_read_lock(); 5034 5035 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5036 const u8 *ht_oper_ie, *ht_cap_ie; 5037 5038 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 5039 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 5040 ht_oper = (void *)(ht_oper_ie + 2); 5041 5042 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 5043 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 5044 ht_cap = (void *)(ht_cap_ie + 2); 5045 5046 if (!ht_cap) { 5047 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5048 ht_oper = NULL; 5049 } 5050 } 5051 5052 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5053 const u8 *vht_oper_ie, *vht_cap; 5054 5055 vht_oper_ie = ieee80211_bss_get_ie(cbss, 5056 WLAN_EID_VHT_OPERATION); 5057 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 5058 vht_oper = (void *)(vht_oper_ie + 2); 5059 if (vht_oper && !ht_oper) { 5060 vht_oper = NULL; 5061 sdata_info(sdata, 5062 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5063 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5064 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5065 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5066 } 5067 5068 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 5069 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 5070 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5071 vht_oper = NULL; 5072 } 5073 } 5074 5075 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5076 const struct cfg80211_bss_ies *ies; 5077 const u8 *he_oper_ie; 5078 5079 ies = rcu_dereference(cbss->ies); 5080 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 5081 ies->data, ies->len); 5082 if (he_oper_ie && 5083 he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3])) 5084 he_oper = (void *)(he_oper_ie + 3); 5085 else 5086 he_oper = NULL; 5087 5088 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 5089 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5090 } 5091 5092 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5093 have_80mhz = false; 5094 for (i = 0; i < sband->n_channels; i++) { 5095 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5096 IEEE80211_CHAN_NO_80MHZ)) 5097 continue; 5098 5099 have_80mhz = true; 5100 break; 5101 } 5102 5103 if (!have_80mhz) 5104 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5105 5106 if (sband->band == NL80211_BAND_S1GHZ) { 5107 const u8 *s1g_oper_ie; 5108 5109 s1g_oper_ie = ieee80211_bss_get_ie(cbss, 5110 WLAN_EID_S1G_OPERATION); 5111 if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper)) 5112 s1g_oper = (void *)(s1g_oper_ie + 2); 5113 else 5114 sdata_info(sdata, 5115 "AP missing S1G operation element?\n"); 5116 } 5117 5118 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5119 cbss->channel, 5120 bss->vht_cap_info, 5121 ht_oper, vht_oper, he_oper, 5122 s1g_oper, 5123 &chandef, false); 5124 5125 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5126 local->rx_chains); 5127 5128 rcu_read_unlock(); 5129 5130 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5131 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5132 return -EINVAL; 5133 } 5134 5135 /* will change later if needed */ 5136 sdata->smps_mode = IEEE80211_SMPS_OFF; 5137 5138 mutex_lock(&local->mtx); 5139 /* 5140 * If this fails (possibly due to channel context sharing 5141 * on incompatible channels, e.g. 80+80 and 160 sharing the 5142 * same control channel) try to use a smaller bandwidth. 5143 */ 5144 ret = ieee80211_vif_use_channel(sdata, &chandef, 5145 IEEE80211_CHANCTX_SHARED); 5146 5147 /* don't downgrade for 5 and 10 MHz channels, though. */ 5148 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5149 chandef.width == NL80211_CHAN_WIDTH_10) 5150 goto out; 5151 5152 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5153 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5154 ret = ieee80211_vif_use_channel(sdata, &chandef, 5155 IEEE80211_CHANCTX_SHARED); 5156 } 5157 out: 5158 mutex_unlock(&local->mtx); 5159 return ret; 5160 } 5161 5162 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5163 u8 *dtim_count, u8 *dtim_period) 5164 { 5165 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5166 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5167 ies->len); 5168 const struct ieee80211_tim_ie *tim = NULL; 5169 const struct ieee80211_bssid_index *idx; 5170 bool valid = tim_ie && tim_ie[1] >= 2; 5171 5172 if (valid) 5173 tim = (void *)(tim_ie + 2); 5174 5175 if (dtim_count) 5176 *dtim_count = valid ? tim->dtim_count : 0; 5177 5178 if (dtim_period) 5179 *dtim_period = valid ? tim->dtim_period : 0; 5180 5181 /* Check if value is overridden by non-transmitted profile */ 5182 if (!idx_ie || idx_ie[1] < 3) 5183 return valid; 5184 5185 idx = (void *)(idx_ie + 2); 5186 5187 if (dtim_count) 5188 *dtim_count = idx->dtim_count; 5189 5190 if (dtim_period) 5191 *dtim_period = idx->dtim_period; 5192 5193 return true; 5194 } 5195 5196 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5197 struct cfg80211_bss *cbss, bool assoc, 5198 bool override) 5199 { 5200 struct ieee80211_local *local = sdata->local; 5201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5202 struct ieee80211_bss *bss = (void *)cbss->priv; 5203 struct sta_info *new_sta = NULL; 5204 struct ieee80211_supported_band *sband; 5205 bool have_sta = false; 5206 int err; 5207 5208 sband = local->hw.wiphy->bands[cbss->channel->band]; 5209 5210 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5211 return -EINVAL; 5212 5213 /* If a reconfig is happening, bail out */ 5214 if (local->in_reconfig) 5215 return -EBUSY; 5216 5217 if (assoc) { 5218 rcu_read_lock(); 5219 have_sta = sta_info_get(sdata, cbss->bssid); 5220 rcu_read_unlock(); 5221 } 5222 5223 if (!have_sta) { 5224 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5225 if (!new_sta) 5226 return -ENOMEM; 5227 } 5228 5229 /* 5230 * Set up the information for the new channel before setting the 5231 * new channel. We can't - completely race-free - change the basic 5232 * rates bitmap and the channel (sband) that it refers to, but if 5233 * we set it up before we at least avoid calling into the driver's 5234 * bss_info_changed() method with invalid information (since we do 5235 * call that from changing the channel - only for IDLE and perhaps 5236 * some others, but ...). 5237 * 5238 * So to avoid that, just set up all the new information before the 5239 * channel, but tell the driver to apply it only afterwards, since 5240 * it might need the new channel for that. 5241 */ 5242 if (new_sta) { 5243 u32 rates = 0, basic_rates = 0; 5244 bool have_higher_than_11mbit; 5245 int min_rate = INT_MAX, min_rate_index = -1; 5246 const struct cfg80211_bss_ies *ies; 5247 int shift = ieee80211_vif_get_shift(&sdata->vif); 5248 5249 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5250 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5251 ieee80211_s1g_sta_rate_init(new_sta); 5252 goto skip_rates; 5253 } 5254 5255 ieee80211_get_rates(sband, bss->supp_rates, 5256 bss->supp_rates_len, 5257 &rates, &basic_rates, 5258 &have_higher_than_11mbit, 5259 &min_rate, &min_rate_index, 5260 shift); 5261 5262 /* 5263 * This used to be a workaround for basic rates missing 5264 * in the association response frame. Now that we no 5265 * longer use the basic rates from there, it probably 5266 * doesn't happen any more, but keep the workaround so 5267 * in case some *other* APs are buggy in different ways 5268 * we can connect -- with a warning. 5269 * Allow this workaround only in case the AP provided at least 5270 * one rate. 5271 */ 5272 if (min_rate_index < 0) { 5273 sdata_info(sdata, 5274 "No legacy rates in association response\n"); 5275 5276 sta_info_free(local, new_sta); 5277 return -EINVAL; 5278 } else if (!basic_rates) { 5279 sdata_info(sdata, 5280 "No basic rates, using min rate instead\n"); 5281 basic_rates = BIT(min_rate_index); 5282 } 5283 5284 if (rates) 5285 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5286 else 5287 sdata_info(sdata, 5288 "No rates found, keeping mandatory only\n"); 5289 5290 sdata->vif.bss_conf.basic_rates = basic_rates; 5291 5292 /* cf. IEEE 802.11 9.2.12 */ 5293 if (cbss->channel->band == NL80211_BAND_2GHZ && 5294 have_higher_than_11mbit) 5295 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5296 else 5297 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5298 5299 skip_rates: 5300 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5301 5302 /* set timing information */ 5303 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5304 rcu_read_lock(); 5305 ies = rcu_dereference(cbss->beacon_ies); 5306 if (ies) { 5307 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5308 sdata->vif.bss_conf.sync_device_ts = 5309 bss->device_ts_beacon; 5310 5311 ieee80211_get_dtim(ies, 5312 &sdata->vif.bss_conf.sync_dtim_count, 5313 NULL); 5314 } else if (!ieee80211_hw_check(&sdata->local->hw, 5315 TIMING_BEACON_ONLY)) { 5316 ies = rcu_dereference(cbss->proberesp_ies); 5317 /* must be non-NULL since beacon IEs were NULL */ 5318 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5319 sdata->vif.bss_conf.sync_device_ts = 5320 bss->device_ts_presp; 5321 sdata->vif.bss_conf.sync_dtim_count = 0; 5322 } else { 5323 sdata->vif.bss_conf.sync_tsf = 0; 5324 sdata->vif.bss_conf.sync_device_ts = 0; 5325 sdata->vif.bss_conf.sync_dtim_count = 0; 5326 } 5327 rcu_read_unlock(); 5328 } 5329 5330 if (new_sta || override) { 5331 err = ieee80211_prep_channel(sdata, cbss); 5332 if (err) { 5333 if (new_sta) 5334 sta_info_free(local, new_sta); 5335 return -EINVAL; 5336 } 5337 } 5338 5339 if (new_sta) { 5340 /* 5341 * tell driver about BSSID, basic rates and timing 5342 * this was set up above, before setting the channel 5343 */ 5344 ieee80211_bss_info_change_notify(sdata, 5345 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5346 BSS_CHANGED_BEACON_INT); 5347 5348 if (assoc) 5349 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5350 5351 err = sta_info_insert(new_sta); 5352 new_sta = NULL; 5353 if (err) { 5354 sdata_info(sdata, 5355 "failed to insert STA entry for the AP (error %d)\n", 5356 err); 5357 return err; 5358 } 5359 } else 5360 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5361 5362 /* Cancel scan to ensure that nothing interferes with connection */ 5363 if (local->scanning) 5364 ieee80211_scan_cancel(local); 5365 5366 return 0; 5367 } 5368 5369 /* config hooks */ 5370 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5371 struct cfg80211_auth_request *req) 5372 { 5373 struct ieee80211_local *local = sdata->local; 5374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5375 struct ieee80211_mgd_auth_data *auth_data; 5376 u16 auth_alg; 5377 int err; 5378 bool cont_auth; 5379 5380 /* prepare auth data structure */ 5381 5382 switch (req->auth_type) { 5383 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5384 auth_alg = WLAN_AUTH_OPEN; 5385 break; 5386 case NL80211_AUTHTYPE_SHARED_KEY: 5387 if (fips_enabled) 5388 return -EOPNOTSUPP; 5389 auth_alg = WLAN_AUTH_SHARED_KEY; 5390 break; 5391 case NL80211_AUTHTYPE_FT: 5392 auth_alg = WLAN_AUTH_FT; 5393 break; 5394 case NL80211_AUTHTYPE_NETWORK_EAP: 5395 auth_alg = WLAN_AUTH_LEAP; 5396 break; 5397 case NL80211_AUTHTYPE_SAE: 5398 auth_alg = WLAN_AUTH_SAE; 5399 break; 5400 case NL80211_AUTHTYPE_FILS_SK: 5401 auth_alg = WLAN_AUTH_FILS_SK; 5402 break; 5403 case NL80211_AUTHTYPE_FILS_SK_PFS: 5404 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5405 break; 5406 case NL80211_AUTHTYPE_FILS_PK: 5407 auth_alg = WLAN_AUTH_FILS_PK; 5408 break; 5409 default: 5410 return -EOPNOTSUPP; 5411 } 5412 5413 if (ifmgd->assoc_data) 5414 return -EBUSY; 5415 5416 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5417 req->ie_len, GFP_KERNEL); 5418 if (!auth_data) 5419 return -ENOMEM; 5420 5421 auth_data->bss = req->bss; 5422 5423 if (req->auth_data_len >= 4) { 5424 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5425 __le16 *pos = (__le16 *) req->auth_data; 5426 5427 auth_data->sae_trans = le16_to_cpu(pos[0]); 5428 auth_data->sae_status = le16_to_cpu(pos[1]); 5429 } 5430 memcpy(auth_data->data, req->auth_data + 4, 5431 req->auth_data_len - 4); 5432 auth_data->data_len += req->auth_data_len - 4; 5433 } 5434 5435 /* Check if continuing authentication or trying to authenticate with the 5436 * same BSS that we were in the process of authenticating with and avoid 5437 * removal and re-addition of the STA entry in 5438 * ieee80211_prep_connection(). 5439 */ 5440 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5441 5442 if (req->ie && req->ie_len) { 5443 memcpy(&auth_data->data[auth_data->data_len], 5444 req->ie, req->ie_len); 5445 auth_data->data_len += req->ie_len; 5446 } 5447 5448 if (req->key && req->key_len) { 5449 auth_data->key_len = req->key_len; 5450 auth_data->key_idx = req->key_idx; 5451 memcpy(auth_data->key, req->key, req->key_len); 5452 } 5453 5454 auth_data->algorithm = auth_alg; 5455 5456 /* try to authenticate/probe */ 5457 5458 if (ifmgd->auth_data) { 5459 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5460 auth_data->peer_confirmed = 5461 ifmgd->auth_data->peer_confirmed; 5462 } 5463 ieee80211_destroy_auth_data(sdata, cont_auth); 5464 } 5465 5466 /* prep auth_data so we don't go into idle on disassoc */ 5467 ifmgd->auth_data = auth_data; 5468 5469 /* If this is continuation of an ongoing SAE authentication exchange 5470 * (i.e., request to send SAE Confirm) and the peer has already 5471 * confirmed, mark authentication completed since we are about to send 5472 * out SAE Confirm. 5473 */ 5474 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5475 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5476 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5477 5478 if (ifmgd->associated) { 5479 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5480 5481 sdata_info(sdata, 5482 "disconnect from AP %pM for new auth to %pM\n", 5483 ifmgd->associated->bssid, req->bss->bssid); 5484 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5485 WLAN_REASON_UNSPECIFIED, 5486 false, frame_buf); 5487 5488 ieee80211_report_disconnect(sdata, frame_buf, 5489 sizeof(frame_buf), true, 5490 WLAN_REASON_UNSPECIFIED, 5491 false); 5492 } 5493 5494 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5495 5496 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5497 if (err) 5498 goto err_clear; 5499 5500 err = ieee80211_auth(sdata); 5501 if (err) { 5502 sta_info_destroy_addr(sdata, req->bss->bssid); 5503 goto err_clear; 5504 } 5505 5506 /* hold our own reference */ 5507 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5508 return 0; 5509 5510 err_clear: 5511 eth_zero_addr(ifmgd->bssid); 5512 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5513 ifmgd->auth_data = NULL; 5514 mutex_lock(&sdata->local->mtx); 5515 ieee80211_vif_release_channel(sdata); 5516 mutex_unlock(&sdata->local->mtx); 5517 kfree(auth_data); 5518 return err; 5519 } 5520 5521 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5522 struct cfg80211_assoc_request *req) 5523 { 5524 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5525 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5526 struct ieee80211_local *local = sdata->local; 5527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5528 struct ieee80211_bss *bss = (void *)req->bss->priv; 5529 struct ieee80211_mgd_assoc_data *assoc_data; 5530 const struct cfg80211_bss_ies *beacon_ies; 5531 struct ieee80211_supported_band *sband; 5532 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5533 const u8 *ssidie, *ht_ie, *vht_ie; 5534 int i, err; 5535 bool override = false; 5536 5537 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5538 if (!assoc_data) 5539 return -ENOMEM; 5540 5541 rcu_read_lock(); 5542 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5543 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5544 rcu_read_unlock(); 5545 kfree(assoc_data); 5546 return -EINVAL; 5547 } 5548 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5549 assoc_data->ssid_len = ssidie[1]; 5550 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5551 bss_conf->ssid_len = assoc_data->ssid_len; 5552 rcu_read_unlock(); 5553 5554 if (ifmgd->associated) { 5555 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5556 5557 sdata_info(sdata, 5558 "disconnect from AP %pM for new assoc to %pM\n", 5559 ifmgd->associated->bssid, req->bss->bssid); 5560 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5561 WLAN_REASON_UNSPECIFIED, 5562 false, frame_buf); 5563 5564 ieee80211_report_disconnect(sdata, frame_buf, 5565 sizeof(frame_buf), true, 5566 WLAN_REASON_UNSPECIFIED, 5567 false); 5568 } 5569 5570 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5571 err = -EBUSY; 5572 goto err_free; 5573 } 5574 5575 if (ifmgd->assoc_data) { 5576 err = -EBUSY; 5577 goto err_free; 5578 } 5579 5580 if (ifmgd->auth_data) { 5581 bool match; 5582 5583 /* keep sta info, bssid if matching */ 5584 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5585 ieee80211_destroy_auth_data(sdata, match); 5586 } 5587 5588 /* prepare assoc data */ 5589 5590 ifmgd->beacon_crc_valid = false; 5591 5592 assoc_data->wmm = bss->wmm_used && 5593 (local->hw.queues >= IEEE80211_NUM_ACS); 5594 5595 /* 5596 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5597 * We still associate in non-HT mode (11a/b/g) if any one of these 5598 * ciphers is configured as pairwise. 5599 * We can set this to true for non-11n hardware, that'll be checked 5600 * separately along with the peer capabilities. 5601 */ 5602 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5603 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5604 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5605 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5606 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5607 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5608 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5609 netdev_info(sdata->dev, 5610 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5611 } 5612 } 5613 5614 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5615 5616 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5617 if (!bss->wmm_used) { 5618 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5619 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5620 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5621 netdev_info(sdata->dev, 5622 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5623 } 5624 5625 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5626 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5627 sizeof(ifmgd->ht_capa_mask)); 5628 5629 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5630 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5631 sizeof(ifmgd->vht_capa_mask)); 5632 5633 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5634 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5635 sizeof(ifmgd->s1g_capa_mask)); 5636 5637 if (req->ie && req->ie_len) { 5638 memcpy(assoc_data->ie, req->ie, req->ie_len); 5639 assoc_data->ie_len = req->ie_len; 5640 } 5641 5642 if (req->fils_kek) { 5643 /* should already be checked in cfg80211 - so warn */ 5644 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5645 err = -EINVAL; 5646 goto err_free; 5647 } 5648 memcpy(assoc_data->fils_kek, req->fils_kek, 5649 req->fils_kek_len); 5650 assoc_data->fils_kek_len = req->fils_kek_len; 5651 } 5652 5653 if (req->fils_nonces) 5654 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5655 2 * FILS_NONCE_LEN); 5656 5657 assoc_data->bss = req->bss; 5658 5659 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5660 if (ifmgd->powersave) 5661 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5662 else 5663 sdata->smps_mode = IEEE80211_SMPS_OFF; 5664 } else 5665 sdata->smps_mode = ifmgd->req_smps; 5666 5667 assoc_data->capability = req->bss->capability; 5668 assoc_data->supp_rates = bss->supp_rates; 5669 assoc_data->supp_rates_len = bss->supp_rates_len; 5670 5671 rcu_read_lock(); 5672 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5673 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5674 assoc_data->ap_ht_param = 5675 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5676 else if (!is_6ghz) 5677 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5678 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5679 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5680 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5681 sizeof(struct ieee80211_vht_cap)); 5682 else if (is_5ghz) 5683 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5684 IEEE80211_STA_DISABLE_HE; 5685 rcu_read_unlock(); 5686 5687 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5688 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5689 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5690 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5691 5692 if (bss->wmm_used && bss->uapsd_supported && 5693 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5694 assoc_data->uapsd = true; 5695 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5696 } else { 5697 assoc_data->uapsd = false; 5698 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5699 } 5700 5701 if (req->prev_bssid) 5702 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5703 5704 if (req->use_mfp) { 5705 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5706 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5707 } else { 5708 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5709 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5710 } 5711 5712 if (req->flags & ASSOC_REQ_USE_RRM) 5713 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5714 else 5715 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5716 5717 if (req->crypto.control_port) 5718 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5719 else 5720 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5721 5722 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5723 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5724 sdata->control_port_over_nl80211 = 5725 req->crypto.control_port_over_nl80211; 5726 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5727 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5728 sdata->vif.type); 5729 5730 /* kick off associate process */ 5731 5732 ifmgd->assoc_data = assoc_data; 5733 ifmgd->dtim_period = 0; 5734 ifmgd->have_beacon = false; 5735 5736 /* override HT/VHT configuration only if the AP and we support it */ 5737 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5738 struct ieee80211_sta_ht_cap sta_ht_cap; 5739 5740 if (req->flags & ASSOC_REQ_DISABLE_HT) 5741 override = true; 5742 5743 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5744 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5745 5746 /* check for 40 MHz disable override */ 5747 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5748 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5749 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5750 override = true; 5751 5752 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5753 req->flags & ASSOC_REQ_DISABLE_VHT) 5754 override = true; 5755 } 5756 5757 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5758 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5759 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5760 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5761 } 5762 5763 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5764 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5765 5766 if (req->flags & ASSOC_REQ_DISABLE_HE) 5767 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5768 5769 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5770 if (err) 5771 goto err_clear; 5772 5773 rcu_read_lock(); 5774 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5775 5776 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5777 !beacon_ies) { 5778 /* 5779 * Wait up to one beacon interval ... 5780 * should this be more if we miss one? 5781 */ 5782 sdata_info(sdata, "waiting for beacon from %pM\n", 5783 ifmgd->bssid); 5784 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5785 assoc_data->timeout_started = true; 5786 assoc_data->need_beacon = true; 5787 } else if (beacon_ies) { 5788 const struct element *elem; 5789 u8 dtim_count = 0; 5790 5791 ieee80211_get_dtim(beacon_ies, &dtim_count, 5792 &ifmgd->dtim_period); 5793 5794 ifmgd->have_beacon = true; 5795 assoc_data->timeout = jiffies; 5796 assoc_data->timeout_started = true; 5797 5798 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5799 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5800 sdata->vif.bss_conf.sync_device_ts = 5801 bss->device_ts_beacon; 5802 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5803 } 5804 5805 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5806 beacon_ies->data, beacon_ies->len); 5807 if (elem && elem->datalen >= 3) 5808 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5809 else 5810 sdata->vif.bss_conf.profile_periodicity = 0; 5811 5812 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5813 beacon_ies->data, beacon_ies->len); 5814 if (elem && elem->datalen >= 11 && 5815 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5816 sdata->vif.bss_conf.ema_ap = true; 5817 else 5818 sdata->vif.bss_conf.ema_ap = false; 5819 } else { 5820 assoc_data->timeout = jiffies; 5821 assoc_data->timeout_started = true; 5822 } 5823 rcu_read_unlock(); 5824 5825 run_again(sdata, assoc_data->timeout); 5826 5827 if (bss->corrupt_data) { 5828 char *corrupt_type = "data"; 5829 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5830 if (bss->corrupt_data & 5831 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5832 corrupt_type = "beacon and probe response"; 5833 else 5834 corrupt_type = "beacon"; 5835 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5836 corrupt_type = "probe response"; 5837 sdata_info(sdata, "associating with AP with corrupt %s\n", 5838 corrupt_type); 5839 } 5840 5841 return 0; 5842 err_clear: 5843 eth_zero_addr(ifmgd->bssid); 5844 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5845 ifmgd->assoc_data = NULL; 5846 err_free: 5847 kfree(assoc_data); 5848 return err; 5849 } 5850 5851 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5852 struct cfg80211_deauth_request *req) 5853 { 5854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5855 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5856 bool tx = !req->local_state_change; 5857 5858 if (ifmgd->auth_data && 5859 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5860 sdata_info(sdata, 5861 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5862 req->bssid, req->reason_code, 5863 ieee80211_get_reason_code_string(req->reason_code)); 5864 5865 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5866 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5867 IEEE80211_STYPE_DEAUTH, 5868 req->reason_code, tx, 5869 frame_buf); 5870 ieee80211_destroy_auth_data(sdata, false); 5871 ieee80211_report_disconnect(sdata, frame_buf, 5872 sizeof(frame_buf), true, 5873 req->reason_code, false); 5874 5875 return 0; 5876 } 5877 5878 if (ifmgd->assoc_data && 5879 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5880 sdata_info(sdata, 5881 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5882 req->bssid, req->reason_code, 5883 ieee80211_get_reason_code_string(req->reason_code)); 5884 5885 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5886 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5887 IEEE80211_STYPE_DEAUTH, 5888 req->reason_code, tx, 5889 frame_buf); 5890 ieee80211_destroy_assoc_data(sdata, false, true); 5891 ieee80211_report_disconnect(sdata, frame_buf, 5892 sizeof(frame_buf), true, 5893 req->reason_code, false); 5894 return 0; 5895 } 5896 5897 if (ifmgd->associated && 5898 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5899 sdata_info(sdata, 5900 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5901 req->bssid, req->reason_code, 5902 ieee80211_get_reason_code_string(req->reason_code)); 5903 5904 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5905 req->reason_code, tx, frame_buf); 5906 ieee80211_report_disconnect(sdata, frame_buf, 5907 sizeof(frame_buf), true, 5908 req->reason_code, false); 5909 return 0; 5910 } 5911 5912 return -ENOTCONN; 5913 } 5914 5915 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5916 struct cfg80211_disassoc_request *req) 5917 { 5918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5919 u8 bssid[ETH_ALEN]; 5920 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5921 5922 /* 5923 * cfg80211 should catch this ... but it's racy since 5924 * we can receive a disassoc frame, process it, hand it 5925 * to cfg80211 while that's in a locked section already 5926 * trying to tell us that the user wants to disconnect. 5927 */ 5928 if (ifmgd->associated != req->bss) 5929 return -ENOLINK; 5930 5931 sdata_info(sdata, 5932 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5933 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5934 5935 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5936 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5937 req->reason_code, !req->local_state_change, 5938 frame_buf); 5939 5940 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5941 req->reason_code, false); 5942 5943 return 0; 5944 } 5945 5946 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5947 { 5948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5949 5950 /* 5951 * Make sure some work items will not run after this, 5952 * they will not do anything but might not have been 5953 * cancelled when disconnecting. 5954 */ 5955 cancel_work_sync(&ifmgd->monitor_work); 5956 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5957 cancel_work_sync(&ifmgd->request_smps_work); 5958 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5959 cancel_work_sync(&ifmgd->chswitch_work); 5960 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5961 5962 sdata_lock(sdata); 5963 if (ifmgd->assoc_data) { 5964 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5965 ieee80211_destroy_assoc_data(sdata, false, false); 5966 cfg80211_assoc_timeout(sdata->dev, bss); 5967 } 5968 if (ifmgd->auth_data) 5969 ieee80211_destroy_auth_data(sdata, false); 5970 spin_lock_bh(&ifmgd->teardown_lock); 5971 if (ifmgd->teardown_skb) { 5972 kfree_skb(ifmgd->teardown_skb); 5973 ifmgd->teardown_skb = NULL; 5974 ifmgd->orig_teardown_skb = NULL; 5975 } 5976 kfree(ifmgd->assoc_req_ies); 5977 ifmgd->assoc_req_ies = NULL; 5978 ifmgd->assoc_req_ies_len = 0; 5979 spin_unlock_bh(&ifmgd->teardown_lock); 5980 del_timer_sync(&ifmgd->timer); 5981 sdata_unlock(sdata); 5982 } 5983 5984 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5985 enum nl80211_cqm_rssi_threshold_event rssi_event, 5986 s32 rssi_level, 5987 gfp_t gfp) 5988 { 5989 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5990 5991 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5992 5993 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5994 } 5995 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5996 5997 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5998 { 5999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6000 6001 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6002 6003 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6004 } 6005 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6006