1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2020 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 const struct ieee80211_s1g_oper_ie *s1g_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->freq1_offset = channel->freq_offset; 165 166 if (channel->band == NL80211_BAND_6GHZ) { 167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) 168 ret = IEEE80211_STA_DISABLE_HT | 169 IEEE80211_STA_DISABLE_VHT | 170 IEEE80211_STA_DISABLE_HE; 171 else 172 ret = 0; 173 vht_chandef = *chandef; 174 goto out; 175 } else if (sband->band == NL80211_BAND_S1GHZ) { 176 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 177 sdata_info(sdata, 178 "Missing S1G Operation Element? Trying operating == primary\n"); 179 chandef->width = ieee80211_s1g_channel_width(channel); 180 } 181 182 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 183 IEEE80211_STA_DISABLE_VHT | 184 IEEE80211_STA_DISABLE_80P80MHZ | 185 IEEE80211_STA_DISABLE_160MHZ; 186 goto out; 187 } 188 189 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 191 192 if (!ht_oper || !sta_ht_cap.ht_supported) { 193 ret = IEEE80211_STA_DISABLE_HT | 194 IEEE80211_STA_DISABLE_VHT | 195 IEEE80211_STA_DISABLE_HE; 196 goto out; 197 } 198 199 chandef->width = NL80211_CHAN_WIDTH_20; 200 201 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 202 channel->band); 203 /* check that channel matches the right operating channel */ 204 if (!tracking && channel->center_freq != ht_cfreq) { 205 /* 206 * It's possible that some APs are confused here; 207 * Netgear WNDR3700 sometimes reports 4 higher than 208 * the actual channel in association responses, but 209 * since we look at probe response/beacon data here 210 * it should be OK. 211 */ 212 sdata_info(sdata, 213 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 214 channel->center_freq, ht_cfreq, 215 ht_oper->primary_chan, channel->band); 216 ret = IEEE80211_STA_DISABLE_HT | 217 IEEE80211_STA_DISABLE_VHT | 218 IEEE80211_STA_DISABLE_HE; 219 goto out; 220 } 221 222 /* check 40 MHz support, if we have it */ 223 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 224 ieee80211_chandef_ht_oper(ht_oper, chandef); 225 } else { 226 /* 40 MHz (and 80 MHz) must be supported for VHT */ 227 ret = IEEE80211_STA_DISABLE_VHT; 228 /* also mark 40 MHz disabled */ 229 ret |= IEEE80211_STA_DISABLE_40MHZ; 230 goto out; 231 } 232 233 if (!vht_oper || !sband->vht_cap.vht_supported) { 234 ret = IEEE80211_STA_DISABLE_VHT; 235 goto out; 236 } 237 238 vht_chandef = *chandef; 239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 240 (le32_to_cpu(he_oper->he_oper_params) & 241 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 242 struct ieee80211_vht_operation he_oper_vht_cap; 243 244 /* 245 * Set only first 3 bytes (other 2 aren't used in 246 * ieee80211_chandef_vht_oper() anyway) 247 */ 248 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 249 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 250 251 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 252 &he_oper_vht_cap, ht_oper, 253 &vht_chandef)) { 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 255 sdata_info(sdata, 256 "HE AP VHT information is invalid, disable HE\n"); 257 ret = IEEE80211_STA_DISABLE_HE; 258 goto out; 259 } 260 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 261 vht_cap_info, 262 vht_oper, ht_oper, 263 &vht_chandef)) { 264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 265 sdata_info(sdata, 266 "AP VHT information is invalid, disable VHT\n"); 267 ret = IEEE80211_STA_DISABLE_VHT; 268 goto out; 269 } 270 271 if (!cfg80211_chandef_valid(&vht_chandef)) { 272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 273 sdata_info(sdata, 274 "AP VHT information is invalid, disable VHT\n"); 275 ret = IEEE80211_STA_DISABLE_VHT; 276 goto out; 277 } 278 279 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 280 ret = 0; 281 goto out; 282 } 283 284 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 285 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 286 sdata_info(sdata, 287 "AP VHT information doesn't match HT, disable VHT\n"); 288 ret = IEEE80211_STA_DISABLE_VHT; 289 goto out; 290 } 291 292 *chandef = vht_chandef; 293 294 ret = 0; 295 296 out: 297 /* 298 * When tracking the current AP, don't do any further checks if the 299 * new chandef is identical to the one we're currently using for the 300 * connection. This keeps us from playing ping-pong with regulatory, 301 * without it the following can happen (for example): 302 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 303 * - AP advertises regdom US 304 * - CRDA loads regdom US with 80 MHz prohibited (old database) 305 * - the code below detects an unsupported channel, downgrades, and 306 * we disconnect from the AP in the caller 307 * - disconnect causes CRDA to reload world regdomain and the game 308 * starts anew. 309 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 310 * 311 * It seems possible that there are still scenarios with CSA or real 312 * bandwidth changes where a this could happen, but those cases are 313 * less common and wouldn't completely prevent using the AP. 314 */ 315 if (tracking && 316 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 317 return ret; 318 319 /* don't print the message below for VHT mismatch if VHT is disabled */ 320 if (ret & IEEE80211_STA_DISABLE_VHT) 321 vht_chandef = *chandef; 322 323 /* 324 * Ignore the DISABLED flag when we're already connected and only 325 * tracking the APs beacon for bandwidth changes - otherwise we 326 * might get disconnected here if we connect to an AP, update our 327 * regulatory information based on the AP's country IE and the 328 * information we have is wrong/outdated and disables the channel 329 * that we're actually using for the connection to the AP. 330 */ 331 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 332 tracking ? 0 : 333 IEEE80211_CHAN_DISABLED)) { 334 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 335 ret = IEEE80211_STA_DISABLE_HT | 336 IEEE80211_STA_DISABLE_VHT | 337 IEEE80211_STA_DISABLE_HE; 338 break; 339 } 340 341 ret |= ieee80211_chandef_downgrade(chandef); 342 } 343 344 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 345 IEEE80211_CHAN_NO_HE)) 346 ret |= IEEE80211_STA_DISABLE_HE; 347 348 if (chandef->width != vht_chandef.width && !tracking) 349 sdata_info(sdata, 350 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 351 352 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 353 return ret; 354 } 355 356 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 357 struct sta_info *sta, 358 const struct ieee80211_ht_cap *ht_cap, 359 const struct ieee80211_vht_cap *vht_cap, 360 const struct ieee80211_ht_operation *ht_oper, 361 const struct ieee80211_vht_operation *vht_oper, 362 const struct ieee80211_he_operation *he_oper, 363 const struct ieee80211_s1g_oper_ie *s1g_oper, 364 const u8 *bssid, u32 *changed) 365 { 366 struct ieee80211_local *local = sdata->local; 367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 368 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 369 struct ieee80211_supported_band *sband = 370 local->hw.wiphy->bands[chan->band]; 371 struct cfg80211_chan_def chandef; 372 u16 ht_opmode; 373 u32 flags; 374 enum ieee80211_sta_rx_bandwidth new_sta_bw; 375 u32 vht_cap_info = 0; 376 int ret; 377 378 /* if HT was/is disabled, don't track any bandwidth changes */ 379 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 380 return 0; 381 382 /* don't check VHT if we associated as non-VHT station */ 383 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 384 vht_oper = NULL; 385 386 /* don't check HE if we associated as non-HE station */ 387 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 388 !ieee80211_get_he_sta_cap(sband)) 389 he_oper = NULL; 390 391 if (WARN_ON_ONCE(!sta)) 392 return -EINVAL; 393 394 /* 395 * if bss configuration changed store the new one - 396 * this may be applicable even if channel is identical 397 */ 398 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 399 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 400 *changed |= BSS_CHANGED_HT; 401 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 402 } 403 404 if (vht_cap) 405 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 406 407 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 408 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 409 ht_oper, vht_oper, he_oper, 410 s1g_oper, &chandef, true); 411 412 /* 413 * Downgrade the new channel if we associated with restricted 414 * capabilities. For example, if we associated as a 20 MHz STA 415 * to a 40 MHz AP (due to regulatory, capabilities or config 416 * reasons) then switching to a 40 MHz channel now won't do us 417 * any good -- we couldn't use it with the AP. 418 */ 419 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 420 chandef.width == NL80211_CHAN_WIDTH_80P80) 421 flags |= ieee80211_chandef_downgrade(&chandef); 422 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 423 chandef.width == NL80211_CHAN_WIDTH_160) 424 flags |= ieee80211_chandef_downgrade(&chandef); 425 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 426 chandef.width > NL80211_CHAN_WIDTH_20) 427 flags |= ieee80211_chandef_downgrade(&chandef); 428 429 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 430 return 0; 431 432 sdata_info(sdata, 433 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 434 "width %d (%d.%03d/%d MHz)\n", 435 ifmgd->bssid, chandef.chan->center_freq, 436 chandef.chan->freq_offset, chandef.width, 437 chandef.center_freq1, chandef.freq1_offset, 438 chandef.center_freq2); 439 440 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 441 IEEE80211_STA_DISABLE_VHT | 442 IEEE80211_STA_DISABLE_HE | 443 IEEE80211_STA_DISABLE_40MHZ | 444 IEEE80211_STA_DISABLE_80P80MHZ | 445 IEEE80211_STA_DISABLE_160MHZ)) || 446 !cfg80211_chandef_valid(&chandef)) { 447 sdata_info(sdata, 448 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 449 ifmgd->bssid); 450 return -EINVAL; 451 } 452 453 switch (chandef.width) { 454 case NL80211_CHAN_WIDTH_20_NOHT: 455 case NL80211_CHAN_WIDTH_20: 456 new_sta_bw = IEEE80211_STA_RX_BW_20; 457 break; 458 case NL80211_CHAN_WIDTH_40: 459 new_sta_bw = IEEE80211_STA_RX_BW_40; 460 break; 461 case NL80211_CHAN_WIDTH_80: 462 new_sta_bw = IEEE80211_STA_RX_BW_80; 463 break; 464 case NL80211_CHAN_WIDTH_80P80: 465 case NL80211_CHAN_WIDTH_160: 466 new_sta_bw = IEEE80211_STA_RX_BW_160; 467 break; 468 default: 469 return -EINVAL; 470 } 471 472 if (new_sta_bw > sta->cur_max_bandwidth) 473 new_sta_bw = sta->cur_max_bandwidth; 474 475 if (new_sta_bw < sta->sta.bandwidth) { 476 sta->sta.bandwidth = new_sta_bw; 477 rate_control_rate_update(local, sband, sta, 478 IEEE80211_RC_BW_CHANGED); 479 } 480 481 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 482 if (ret) { 483 sdata_info(sdata, 484 "AP %pM changed bandwidth to incompatible one - disconnect\n", 485 ifmgd->bssid); 486 return ret; 487 } 488 489 if (new_sta_bw > sta->sta.bandwidth) { 490 sta->sta.bandwidth = new_sta_bw; 491 rate_control_rate_update(local, sband, sta, 492 IEEE80211_RC_BW_CHANGED); 493 } 494 495 return 0; 496 } 497 498 /* frame sending functions */ 499 500 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 501 struct sk_buff *skb, u8 ap_ht_param, 502 struct ieee80211_supported_band *sband, 503 struct ieee80211_channel *channel, 504 enum ieee80211_smps_mode smps) 505 { 506 u8 *pos; 507 u32 flags = channel->flags; 508 u16 cap; 509 struct ieee80211_sta_ht_cap ht_cap; 510 511 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 512 513 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 514 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 515 516 /* determine capability flags */ 517 cap = ht_cap.cap; 518 519 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 520 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 521 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 522 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 523 cap &= ~IEEE80211_HT_CAP_SGI_40; 524 } 525 break; 526 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 527 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 528 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 529 cap &= ~IEEE80211_HT_CAP_SGI_40; 530 } 531 break; 532 } 533 534 /* 535 * If 40 MHz was disabled associate as though we weren't 536 * capable of 40 MHz -- some broken APs will never fall 537 * back to trying to transmit in 20 MHz. 538 */ 539 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 540 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 541 cap &= ~IEEE80211_HT_CAP_SGI_40; 542 } 543 544 /* set SM PS mode properly */ 545 cap &= ~IEEE80211_HT_CAP_SM_PS; 546 switch (smps) { 547 case IEEE80211_SMPS_AUTOMATIC: 548 case IEEE80211_SMPS_NUM_MODES: 549 WARN_ON(1); 550 fallthrough; 551 case IEEE80211_SMPS_OFF: 552 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 553 IEEE80211_HT_CAP_SM_PS_SHIFT; 554 break; 555 case IEEE80211_SMPS_STATIC: 556 cap |= WLAN_HT_CAP_SM_PS_STATIC << 557 IEEE80211_HT_CAP_SM_PS_SHIFT; 558 break; 559 case IEEE80211_SMPS_DYNAMIC: 560 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 561 IEEE80211_HT_CAP_SM_PS_SHIFT; 562 break; 563 } 564 565 /* reserve and fill IE */ 566 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 567 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 568 } 569 570 /* This function determines vht capability flags for the association 571 * and builds the IE. 572 * Note - the function may set the owner of the MU-MIMO capability 573 */ 574 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 575 struct sk_buff *skb, 576 struct ieee80211_supported_band *sband, 577 struct ieee80211_vht_cap *ap_vht_cap) 578 { 579 struct ieee80211_local *local = sdata->local; 580 u8 *pos; 581 u32 cap; 582 struct ieee80211_sta_vht_cap vht_cap; 583 u32 mask, ap_bf_sts, our_bf_sts; 584 585 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 586 587 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 588 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 589 590 /* determine capability flags */ 591 cap = vht_cap.cap; 592 593 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 594 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 595 596 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 597 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 598 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 599 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 600 } 601 602 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 603 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 604 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 605 } 606 607 /* 608 * Some APs apparently get confused if our capabilities are better 609 * than theirs, so restrict what we advertise in the assoc request. 610 */ 611 if (!(ap_vht_cap->vht_cap_info & 612 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 613 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 614 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 615 else if (!(ap_vht_cap->vht_cap_info & 616 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 617 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 618 619 /* 620 * If some other vif is using the MU-MIMO capablity we cannot associate 621 * using MU-MIMO - this will lead to contradictions in the group-id 622 * mechanism. 623 * Ownership is defined since association request, in order to avoid 624 * simultaneous associations with MU-MIMO. 625 */ 626 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 627 bool disable_mu_mimo = false; 628 struct ieee80211_sub_if_data *other; 629 630 list_for_each_entry_rcu(other, &local->interfaces, list) { 631 if (other->vif.mu_mimo_owner) { 632 disable_mu_mimo = true; 633 break; 634 } 635 } 636 if (disable_mu_mimo) 637 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 638 else 639 sdata->vif.mu_mimo_owner = true; 640 } 641 642 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 643 644 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 645 our_bf_sts = cap & mask; 646 647 if (ap_bf_sts < our_bf_sts) { 648 cap &= ~mask; 649 cap |= ap_bf_sts; 650 } 651 652 /* reserve and fill IE */ 653 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 654 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 655 } 656 657 /* This function determines HE capability flags for the association 658 * and builds the IE. 659 */ 660 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 661 struct sk_buff *skb, 662 struct ieee80211_supported_band *sband) 663 { 664 u8 *pos; 665 const struct ieee80211_sta_he_cap *he_cap = NULL; 666 struct ieee80211_chanctx_conf *chanctx_conf; 667 u8 he_cap_size; 668 bool reg_cap = false; 669 670 rcu_read_lock(); 671 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 672 if (!WARN_ON_ONCE(!chanctx_conf)) 673 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 674 &chanctx_conf->def, 675 IEEE80211_CHAN_NO_HE); 676 677 rcu_read_unlock(); 678 679 he_cap = ieee80211_get_he_sta_cap(sband); 680 if (!he_cap || !reg_cap) 681 return; 682 683 /* 684 * TODO: the 1 added is because this temporarily is under the EXTENSION 685 * IE. Get rid of it when it moves. 686 */ 687 he_cap_size = 688 2 + 1 + sizeof(he_cap->he_cap_elem) + 689 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 690 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 691 he_cap->he_cap_elem.phy_cap_info); 692 pos = skb_put(skb, he_cap_size); 693 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 694 695 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 696 } 697 698 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 699 { 700 struct ieee80211_local *local = sdata->local; 701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 702 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 703 struct sk_buff *skb; 704 struct ieee80211_mgmt *mgmt; 705 u8 *pos, qos_info, *ie_start; 706 size_t offset = 0, noffset; 707 int i, count, rates_len, supp_rates_len, shift; 708 u16 capab; 709 struct ieee80211_supported_band *sband; 710 struct ieee80211_chanctx_conf *chanctx_conf; 711 struct ieee80211_channel *chan; 712 u32 rates = 0; 713 __le16 listen_int; 714 struct element *ext_capa = NULL; 715 716 /* we know it's writable, cast away the const */ 717 if (assoc_data->ie_len) 718 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 719 assoc_data->ie, 720 assoc_data->ie_len); 721 722 sdata_assert_lock(sdata); 723 724 rcu_read_lock(); 725 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 726 if (WARN_ON(!chanctx_conf)) { 727 rcu_read_unlock(); 728 return; 729 } 730 chan = chanctx_conf->def.chan; 731 rcu_read_unlock(); 732 sband = local->hw.wiphy->bands[chan->band]; 733 shift = ieee80211_vif_get_shift(&sdata->vif); 734 735 if (assoc_data->supp_rates_len) { 736 /* 737 * Get all rates supported by the device and the AP as 738 * some APs don't like getting a superset of their rates 739 * in the association request (e.g. D-Link DAP 1353 in 740 * b-only mode)... 741 */ 742 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 743 assoc_data->supp_rates, 744 assoc_data->supp_rates_len, 745 &rates); 746 } else { 747 /* 748 * In case AP not provide any supported rates information 749 * before association, we send information element(s) with 750 * all rates that we support. 751 */ 752 rates_len = 0; 753 for (i = 0; i < sband->n_bitrates; i++) { 754 rates |= BIT(i); 755 rates_len++; 756 } 757 } 758 759 skb = alloc_skb(local->hw.extra_tx_headroom + 760 sizeof(*mgmt) + /* bit too much but doesn't matter */ 761 2 + assoc_data->ssid_len + /* SSID */ 762 4 + rates_len + /* (extended) rates */ 763 4 + /* power capability */ 764 2 + 2 * sband->n_channels + /* supported channels */ 765 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 766 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 767 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 768 sizeof(struct ieee80211_he_mcs_nss_supp) + 769 IEEE80211_HE_PPE_THRES_MAX_LEN + 770 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 771 assoc_data->ie_len + /* extra IEs */ 772 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 773 9, /* WMM */ 774 GFP_KERNEL); 775 if (!skb) 776 return; 777 778 skb_reserve(skb, local->hw.extra_tx_headroom); 779 780 capab = WLAN_CAPABILITY_ESS; 781 782 if (sband->band == NL80211_BAND_2GHZ) { 783 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 784 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 785 } 786 787 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 788 capab |= WLAN_CAPABILITY_PRIVACY; 789 790 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 791 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 792 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 793 794 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 795 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 796 797 mgmt = skb_put_zero(skb, 24); 798 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 799 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 800 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 801 802 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 803 ieee80211_encode_usf(local->hw.conf.listen_interval) : 804 local->hw.conf.listen_interval); 805 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 806 skb_put(skb, 10); 807 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 808 IEEE80211_STYPE_REASSOC_REQ); 809 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 810 mgmt->u.reassoc_req.listen_interval = listen_int; 811 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 812 ETH_ALEN); 813 } else { 814 skb_put(skb, 4); 815 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 816 IEEE80211_STYPE_ASSOC_REQ); 817 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 818 mgmt->u.assoc_req.listen_interval = listen_int; 819 } 820 821 /* SSID */ 822 pos = skb_put(skb, 2 + assoc_data->ssid_len); 823 ie_start = pos; 824 *pos++ = WLAN_EID_SSID; 825 *pos++ = assoc_data->ssid_len; 826 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 827 828 if (sband->band == NL80211_BAND_S1GHZ) 829 goto skip_rates; 830 831 /* add all rates which were marked to be used above */ 832 supp_rates_len = rates_len; 833 if (supp_rates_len > 8) 834 supp_rates_len = 8; 835 836 pos = skb_put(skb, supp_rates_len + 2); 837 *pos++ = WLAN_EID_SUPP_RATES; 838 *pos++ = supp_rates_len; 839 840 count = 0; 841 for (i = 0; i < sband->n_bitrates; i++) { 842 if (BIT(i) & rates) { 843 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 844 5 * (1 << shift)); 845 *pos++ = (u8) rate; 846 if (++count == 8) 847 break; 848 } 849 } 850 851 if (rates_len > count) { 852 pos = skb_put(skb, rates_len - count + 2); 853 *pos++ = WLAN_EID_EXT_SUPP_RATES; 854 *pos++ = rates_len - count; 855 856 for (i++; i < sband->n_bitrates; i++) { 857 if (BIT(i) & rates) { 858 int rate; 859 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 860 5 * (1 << shift)); 861 *pos++ = (u8) rate; 862 } 863 } 864 } 865 866 skip_rates: 867 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 868 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 869 pos = skb_put(skb, 4); 870 *pos++ = WLAN_EID_PWR_CAPABILITY; 871 *pos++ = 2; 872 *pos++ = 0; /* min tx power */ 873 /* max tx power */ 874 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 875 } 876 877 /* 878 * Per spec, we shouldn't include the list of channels if we advertise 879 * support for extended channel switching, but we've always done that; 880 * (for now?) apply this restriction only on the (new) 6 GHz band. 881 */ 882 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 883 (sband->band != NL80211_BAND_6GHZ || 884 !ext_capa || ext_capa->datalen < 1 || 885 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 886 /* TODO: get this in reg domain format */ 887 pos = skb_put(skb, 2 * sband->n_channels + 2); 888 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 889 *pos++ = 2 * sband->n_channels; 890 for (i = 0; i < sband->n_channels; i++) { 891 *pos++ = ieee80211_frequency_to_channel( 892 sband->channels[i].center_freq); 893 *pos++ = 1; /* one channel in the subband*/ 894 } 895 } 896 897 /* Set MBSSID support for HE AP if needed */ 898 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 899 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 900 ext_capa && ext_capa->datalen >= 3) 901 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 902 903 /* if present, add any custom IEs that go before HT */ 904 if (assoc_data->ie_len) { 905 static const u8 before_ht[] = { 906 WLAN_EID_SSID, 907 WLAN_EID_SUPP_RATES, 908 WLAN_EID_EXT_SUPP_RATES, 909 WLAN_EID_PWR_CAPABILITY, 910 WLAN_EID_SUPPORTED_CHANNELS, 911 WLAN_EID_RSN, 912 WLAN_EID_QOS_CAPA, 913 WLAN_EID_RRM_ENABLED_CAPABILITIES, 914 WLAN_EID_MOBILITY_DOMAIN, 915 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 916 WLAN_EID_RIC_DATA, /* reassoc only */ 917 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 918 }; 919 static const u8 after_ric[] = { 920 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 921 WLAN_EID_HT_CAPABILITY, 922 WLAN_EID_BSS_COEX_2040, 923 /* luckily this is almost always there */ 924 WLAN_EID_EXT_CAPABILITY, 925 WLAN_EID_QOS_TRAFFIC_CAPA, 926 WLAN_EID_TIM_BCAST_REQ, 927 WLAN_EID_INTERWORKING, 928 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 929 WLAN_EID_VHT_CAPABILITY, 930 WLAN_EID_OPMODE_NOTIF, 931 }; 932 933 noffset = ieee80211_ie_split_ric(assoc_data->ie, 934 assoc_data->ie_len, 935 before_ht, 936 ARRAY_SIZE(before_ht), 937 after_ric, 938 ARRAY_SIZE(after_ric), 939 offset); 940 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 941 offset = noffset; 942 } 943 944 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 945 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 946 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 947 948 if (sband->band != NL80211_BAND_6GHZ && 949 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 950 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 951 sband, chan, sdata->smps_mode); 952 953 /* if present, add any custom IEs that go before VHT */ 954 if (assoc_data->ie_len) { 955 static const u8 before_vht[] = { 956 /* 957 * no need to list the ones split off before HT 958 * or generated here 959 */ 960 WLAN_EID_BSS_COEX_2040, 961 WLAN_EID_EXT_CAPABILITY, 962 WLAN_EID_QOS_TRAFFIC_CAPA, 963 WLAN_EID_TIM_BCAST_REQ, 964 WLAN_EID_INTERWORKING, 965 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 966 }; 967 968 /* RIC already taken above, so no need to handle here anymore */ 969 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 970 before_vht, ARRAY_SIZE(before_vht), 971 offset); 972 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 973 offset = noffset; 974 } 975 976 /* if present, add any custom IEs that go before HE */ 977 if (assoc_data->ie_len) { 978 static const u8 before_he[] = { 979 /* 980 * no need to list the ones split off before VHT 981 * or generated here 982 */ 983 WLAN_EID_OPMODE_NOTIF, 984 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 985 /* 11ai elements */ 986 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 987 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 988 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 989 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 990 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 991 /* TODO: add 11ah/11aj/11ak elements */ 992 }; 993 994 /* RIC already taken above, so no need to handle here anymore */ 995 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 996 before_he, ARRAY_SIZE(before_he), 997 offset); 998 pos = skb_put(skb, noffset - offset); 999 memcpy(pos, assoc_data->ie + offset, noffset - offset); 1000 offset = noffset; 1001 } 1002 1003 if (sband->band != NL80211_BAND_6GHZ && 1004 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1005 ieee80211_add_vht_ie(sdata, skb, sband, 1006 &assoc_data->ap_vht_cap); 1007 1008 /* 1009 * If AP doesn't support HT, mark HE as disabled. 1010 * If on the 5GHz band, make sure it supports VHT. 1011 */ 1012 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 1013 (sband->band == NL80211_BAND_5GHZ && 1014 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1015 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 1016 1017 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1018 ieee80211_add_he_ie(sdata, skb, sband); 1019 1020 /* if present, add any custom non-vendor IEs that go after HE */ 1021 if (assoc_data->ie_len) { 1022 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1023 assoc_data->ie_len, 1024 offset); 1025 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1026 offset = noffset; 1027 } 1028 1029 if (assoc_data->wmm) { 1030 if (assoc_data->uapsd) { 1031 qos_info = ifmgd->uapsd_queues; 1032 qos_info |= (ifmgd->uapsd_max_sp_len << 1033 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1034 } else { 1035 qos_info = 0; 1036 } 1037 1038 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1039 } 1040 1041 if (sband->band == NL80211_BAND_S1GHZ) { 1042 ieee80211_add_aid_request_ie(sdata, skb); 1043 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1044 } 1045 1046 /* add any remaining custom (i.e. vendor specific here) IEs */ 1047 if (assoc_data->ie_len) { 1048 noffset = assoc_data->ie_len; 1049 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1050 } 1051 1052 if (assoc_data->fils_kek_len && 1053 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1054 dev_kfree_skb(skb); 1055 return; 1056 } 1057 1058 pos = skb_tail_pointer(skb); 1059 kfree(ifmgd->assoc_req_ies); 1060 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1061 ifmgd->assoc_req_ies_len = pos - ie_start; 1062 1063 drv_mgd_prepare_tx(local, sdata, 0); 1064 1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1066 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1067 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1068 IEEE80211_TX_INTFL_MLME_CONN_TX; 1069 ieee80211_tx_skb(sdata, skb); 1070 } 1071 1072 void ieee80211_send_pspoll(struct ieee80211_local *local, 1073 struct ieee80211_sub_if_data *sdata) 1074 { 1075 struct ieee80211_pspoll *pspoll; 1076 struct sk_buff *skb; 1077 1078 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1079 if (!skb) 1080 return; 1081 1082 pspoll = (struct ieee80211_pspoll *) skb->data; 1083 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1084 1085 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1086 ieee80211_tx_skb(sdata, skb); 1087 } 1088 1089 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1090 struct ieee80211_sub_if_data *sdata, 1091 bool powersave) 1092 { 1093 struct sk_buff *skb; 1094 struct ieee80211_hdr_3addr *nullfunc; 1095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1096 1097 /* Don't send NDPs when STA is connected HE */ 1098 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1099 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1100 return; 1101 1102 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1103 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1104 if (!skb) 1105 return; 1106 1107 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1108 if (powersave) 1109 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1110 1111 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1112 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1113 1114 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1115 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1116 1117 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1118 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1119 1120 ieee80211_tx_skb(sdata, skb); 1121 } 1122 1123 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1124 struct ieee80211_sub_if_data *sdata) 1125 { 1126 struct sk_buff *skb; 1127 struct ieee80211_hdr *nullfunc; 1128 __le16 fc; 1129 1130 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1131 return; 1132 1133 /* Don't send NDPs when connected HE */ 1134 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1135 return; 1136 1137 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1138 if (!skb) 1139 return; 1140 1141 skb_reserve(skb, local->hw.extra_tx_headroom); 1142 1143 nullfunc = skb_put_zero(skb, 30); 1144 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1145 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1146 nullfunc->frame_control = fc; 1147 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1148 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1149 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1150 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1151 1152 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1153 ieee80211_tx_skb(sdata, skb); 1154 } 1155 1156 /* spectrum management related things */ 1157 static void ieee80211_chswitch_work(struct work_struct *work) 1158 { 1159 struct ieee80211_sub_if_data *sdata = 1160 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1161 struct ieee80211_local *local = sdata->local; 1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1163 int ret; 1164 1165 if (!ieee80211_sdata_running(sdata)) 1166 return; 1167 1168 sdata_lock(sdata); 1169 mutex_lock(&local->mtx); 1170 mutex_lock(&local->chanctx_mtx); 1171 1172 if (!ifmgd->associated) 1173 goto out; 1174 1175 if (!sdata->vif.csa_active) 1176 goto out; 1177 1178 /* 1179 * using reservation isn't immediate as it may be deferred until later 1180 * with multi-vif. once reservation is complete it will re-schedule the 1181 * work with no reserved_chanctx so verify chandef to check if it 1182 * completed successfully 1183 */ 1184 1185 if (sdata->reserved_chanctx) { 1186 struct ieee80211_supported_band *sband = NULL; 1187 struct sta_info *mgd_sta = NULL; 1188 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1189 1190 /* 1191 * with multi-vif csa driver may call ieee80211_csa_finish() 1192 * many times while waiting for other interfaces to use their 1193 * reservations 1194 */ 1195 if (sdata->reserved_ready) 1196 goto out; 1197 1198 if (sdata->vif.bss_conf.chandef.width != 1199 sdata->csa_chandef.width) { 1200 /* 1201 * For managed interface, we need to also update the AP 1202 * station bandwidth and align the rate scale algorithm 1203 * on the bandwidth change. Here we only consider the 1204 * bandwidth of the new channel definition (as channel 1205 * switch flow does not have the full HT/VHT/HE 1206 * information), assuming that if additional changes are 1207 * required they would be done as part of the processing 1208 * of the next beacon from the AP. 1209 */ 1210 switch (sdata->csa_chandef.width) { 1211 case NL80211_CHAN_WIDTH_20_NOHT: 1212 case NL80211_CHAN_WIDTH_20: 1213 default: 1214 bw = IEEE80211_STA_RX_BW_20; 1215 break; 1216 case NL80211_CHAN_WIDTH_40: 1217 bw = IEEE80211_STA_RX_BW_40; 1218 break; 1219 case NL80211_CHAN_WIDTH_80: 1220 bw = IEEE80211_STA_RX_BW_80; 1221 break; 1222 case NL80211_CHAN_WIDTH_80P80: 1223 case NL80211_CHAN_WIDTH_160: 1224 bw = IEEE80211_STA_RX_BW_160; 1225 break; 1226 } 1227 1228 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1229 sband = 1230 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1231 } 1232 1233 if (sdata->vif.bss_conf.chandef.width > 1234 sdata->csa_chandef.width) { 1235 mgd_sta->sta.bandwidth = bw; 1236 rate_control_rate_update(local, sband, mgd_sta, 1237 IEEE80211_RC_BW_CHANGED); 1238 } 1239 1240 ret = ieee80211_vif_use_reserved_context(sdata); 1241 if (ret) { 1242 sdata_info(sdata, 1243 "failed to use reserved channel context, disconnecting (err=%d)\n", 1244 ret); 1245 ieee80211_queue_work(&sdata->local->hw, 1246 &ifmgd->csa_connection_drop_work); 1247 goto out; 1248 } 1249 1250 if (sdata->vif.bss_conf.chandef.width < 1251 sdata->csa_chandef.width) { 1252 mgd_sta->sta.bandwidth = bw; 1253 rate_control_rate_update(local, sband, mgd_sta, 1254 IEEE80211_RC_BW_CHANGED); 1255 } 1256 1257 goto out; 1258 } 1259 1260 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1261 &sdata->csa_chandef)) { 1262 sdata_info(sdata, 1263 "failed to finalize channel switch, disconnecting\n"); 1264 ieee80211_queue_work(&sdata->local->hw, 1265 &ifmgd->csa_connection_drop_work); 1266 goto out; 1267 } 1268 1269 ifmgd->csa_waiting_bcn = true; 1270 1271 ieee80211_sta_reset_beacon_monitor(sdata); 1272 ieee80211_sta_reset_conn_monitor(sdata); 1273 1274 out: 1275 mutex_unlock(&local->chanctx_mtx); 1276 mutex_unlock(&local->mtx); 1277 sdata_unlock(sdata); 1278 } 1279 1280 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1281 { 1282 struct ieee80211_local *local = sdata->local; 1283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1284 int ret; 1285 1286 sdata_assert_lock(sdata); 1287 1288 WARN_ON(!sdata->vif.csa_active); 1289 1290 if (sdata->csa_block_tx) { 1291 ieee80211_wake_vif_queues(local, sdata, 1292 IEEE80211_QUEUE_STOP_REASON_CSA); 1293 sdata->csa_block_tx = false; 1294 } 1295 1296 sdata->vif.csa_active = false; 1297 ifmgd->csa_waiting_bcn = false; 1298 1299 ret = drv_post_channel_switch(sdata); 1300 if (ret) { 1301 sdata_info(sdata, 1302 "driver post channel switch failed, disconnecting\n"); 1303 ieee80211_queue_work(&local->hw, 1304 &ifmgd->csa_connection_drop_work); 1305 return; 1306 } 1307 1308 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1309 } 1310 1311 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1312 { 1313 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1314 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1315 1316 trace_api_chswitch_done(sdata, success); 1317 if (!success) { 1318 sdata_info(sdata, 1319 "driver channel switch failed, disconnecting\n"); 1320 ieee80211_queue_work(&sdata->local->hw, 1321 &ifmgd->csa_connection_drop_work); 1322 } else { 1323 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1324 } 1325 } 1326 EXPORT_SYMBOL(ieee80211_chswitch_done); 1327 1328 static void ieee80211_chswitch_timer(struct timer_list *t) 1329 { 1330 struct ieee80211_sub_if_data *sdata = 1331 from_timer(sdata, t, u.mgd.chswitch_timer); 1332 1333 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1334 } 1335 1336 static void 1337 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1338 { 1339 struct ieee80211_local *local = sdata->local; 1340 1341 if (!local->ops->abort_channel_switch) 1342 return; 1343 1344 mutex_lock(&local->mtx); 1345 1346 mutex_lock(&local->chanctx_mtx); 1347 ieee80211_vif_unreserve_chanctx(sdata); 1348 mutex_unlock(&local->chanctx_mtx); 1349 1350 if (sdata->csa_block_tx) 1351 ieee80211_wake_vif_queues(local, sdata, 1352 IEEE80211_QUEUE_STOP_REASON_CSA); 1353 1354 sdata->csa_block_tx = false; 1355 sdata->vif.csa_active = false; 1356 1357 mutex_unlock(&local->mtx); 1358 1359 drv_abort_channel_switch(sdata); 1360 } 1361 1362 static void 1363 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1364 u64 timestamp, u32 device_timestamp, 1365 struct ieee802_11_elems *elems, 1366 bool beacon) 1367 { 1368 struct ieee80211_local *local = sdata->local; 1369 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1370 struct cfg80211_bss *cbss = ifmgd->associated; 1371 struct ieee80211_chanctx_conf *conf; 1372 struct ieee80211_chanctx *chanctx; 1373 enum nl80211_band current_band; 1374 struct ieee80211_csa_ie csa_ie; 1375 struct ieee80211_channel_switch ch_switch; 1376 struct ieee80211_bss *bss; 1377 int res; 1378 1379 sdata_assert_lock(sdata); 1380 1381 if (!cbss) 1382 return; 1383 1384 if (local->scanning) 1385 return; 1386 1387 current_band = cbss->channel->band; 1388 bss = (void *)cbss->priv; 1389 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1390 bss->vht_cap_info, 1391 ifmgd->flags, 1392 ifmgd->associated->bssid, &csa_ie); 1393 1394 if (!res) { 1395 ch_switch.timestamp = timestamp; 1396 ch_switch.device_timestamp = device_timestamp; 1397 ch_switch.block_tx = csa_ie.mode; 1398 ch_switch.chandef = csa_ie.chandef; 1399 ch_switch.count = csa_ie.count; 1400 ch_switch.delay = csa_ie.max_switch_time; 1401 } 1402 1403 if (res < 0) { 1404 ieee80211_queue_work(&local->hw, 1405 &ifmgd->csa_connection_drop_work); 1406 return; 1407 } 1408 1409 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1410 if (res) 1411 ieee80211_sta_abort_chanswitch(sdata); 1412 else 1413 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1414 return; 1415 } else if (sdata->vif.csa_active || res) { 1416 /* disregard subsequent announcements if already processing */ 1417 return; 1418 } 1419 1420 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1421 IEEE80211_CHAN_DISABLED)) { 1422 sdata_info(sdata, 1423 "AP %pM switches to unsupported channel " 1424 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1425 "disconnecting\n", 1426 ifmgd->associated->bssid, 1427 csa_ie.chandef.chan->center_freq, 1428 csa_ie.chandef.chan->freq_offset, 1429 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1430 csa_ie.chandef.freq1_offset, 1431 csa_ie.chandef.center_freq2); 1432 ieee80211_queue_work(&local->hw, 1433 &ifmgd->csa_connection_drop_work); 1434 return; 1435 } 1436 1437 if (cfg80211_chandef_identical(&csa_ie.chandef, 1438 &sdata->vif.bss_conf.chandef) && 1439 (!csa_ie.mode || !beacon)) { 1440 if (ifmgd->csa_ignored_same_chan) 1441 return; 1442 sdata_info(sdata, 1443 "AP %pM tries to chanswitch to same channel, ignore\n", 1444 ifmgd->associated->bssid); 1445 ifmgd->csa_ignored_same_chan = true; 1446 return; 1447 } 1448 1449 /* 1450 * Drop all TDLS peers - either we disconnect or move to a different 1451 * channel from this point on. There's no telling what our peer will do. 1452 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1453 * have an incompatible wider chandef. 1454 */ 1455 ieee80211_teardown_tdls_peers(sdata); 1456 1457 mutex_lock(&local->mtx); 1458 mutex_lock(&local->chanctx_mtx); 1459 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1460 lockdep_is_held(&local->chanctx_mtx)); 1461 if (!conf) { 1462 sdata_info(sdata, 1463 "no channel context assigned to vif?, disconnecting\n"); 1464 goto drop_connection; 1465 } 1466 1467 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1468 1469 if (local->use_chanctx && 1470 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1471 sdata_info(sdata, 1472 "driver doesn't support chan-switch with channel contexts\n"); 1473 goto drop_connection; 1474 } 1475 1476 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1477 sdata_info(sdata, 1478 "preparing for channel switch failed, disconnecting\n"); 1479 goto drop_connection; 1480 } 1481 1482 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1483 chanctx->mode, false); 1484 if (res) { 1485 sdata_info(sdata, 1486 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1487 res); 1488 goto drop_connection; 1489 } 1490 mutex_unlock(&local->chanctx_mtx); 1491 1492 sdata->vif.csa_active = true; 1493 sdata->csa_chandef = csa_ie.chandef; 1494 sdata->csa_block_tx = csa_ie.mode; 1495 ifmgd->csa_ignored_same_chan = false; 1496 1497 if (sdata->csa_block_tx) 1498 ieee80211_stop_vif_queues(local, sdata, 1499 IEEE80211_QUEUE_STOP_REASON_CSA); 1500 mutex_unlock(&local->mtx); 1501 1502 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1503 csa_ie.count); 1504 1505 if (local->ops->channel_switch) { 1506 /* use driver's channel switch callback */ 1507 drv_channel_switch(local, sdata, &ch_switch); 1508 return; 1509 } 1510 1511 /* channel switch handled in software */ 1512 if (csa_ie.count <= 1) 1513 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1514 else 1515 mod_timer(&ifmgd->chswitch_timer, 1516 TU_TO_EXP_TIME((csa_ie.count - 1) * 1517 cbss->beacon_interval)); 1518 return; 1519 drop_connection: 1520 /* 1521 * This is just so that the disconnect flow will know that 1522 * we were trying to switch channel and failed. In case the 1523 * mode is 1 (we are not allowed to Tx), we will know not to 1524 * send a deauthentication frame. Those two fields will be 1525 * reset when the disconnection worker runs. 1526 */ 1527 sdata->vif.csa_active = true; 1528 sdata->csa_block_tx = csa_ie.mode; 1529 1530 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1531 mutex_unlock(&local->chanctx_mtx); 1532 mutex_unlock(&local->mtx); 1533 } 1534 1535 static bool 1536 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1537 struct ieee80211_channel *channel, 1538 const u8 *country_ie, u8 country_ie_len, 1539 const u8 *pwr_constr_elem, 1540 int *chan_pwr, int *pwr_reduction) 1541 { 1542 struct ieee80211_country_ie_triplet *triplet; 1543 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1544 int i, chan_increment; 1545 bool have_chan_pwr = false; 1546 1547 /* Invalid IE */ 1548 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1549 return false; 1550 1551 triplet = (void *)(country_ie + 3); 1552 country_ie_len -= 3; 1553 1554 switch (channel->band) { 1555 default: 1556 WARN_ON_ONCE(1); 1557 fallthrough; 1558 case NL80211_BAND_2GHZ: 1559 case NL80211_BAND_60GHZ: 1560 chan_increment = 1; 1561 break; 1562 case NL80211_BAND_5GHZ: 1563 case NL80211_BAND_6GHZ: 1564 chan_increment = 4; 1565 break; 1566 } 1567 1568 /* find channel */ 1569 while (country_ie_len >= 3) { 1570 u8 first_channel = triplet->chans.first_channel; 1571 1572 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1573 goto next; 1574 1575 for (i = 0; i < triplet->chans.num_channels; i++) { 1576 if (first_channel + i * chan_increment == chan) { 1577 have_chan_pwr = true; 1578 *chan_pwr = triplet->chans.max_power; 1579 break; 1580 } 1581 } 1582 if (have_chan_pwr) 1583 break; 1584 1585 next: 1586 triplet++; 1587 country_ie_len -= 3; 1588 } 1589 1590 if (have_chan_pwr && pwr_constr_elem) 1591 *pwr_reduction = *pwr_constr_elem; 1592 else 1593 *pwr_reduction = 0; 1594 1595 return have_chan_pwr; 1596 } 1597 1598 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1599 struct ieee80211_channel *channel, 1600 const u8 *cisco_dtpc_ie, 1601 int *pwr_level) 1602 { 1603 /* From practical testing, the first data byte of the DTPC element 1604 * seems to contain the requested dBm level, and the CLI on Cisco 1605 * APs clearly state the range is -127 to 127 dBm, which indicates 1606 * a signed byte, although it seemingly never actually goes negative. 1607 * The other byte seems to always be zero. 1608 */ 1609 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1610 } 1611 1612 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1613 struct ieee80211_channel *channel, 1614 struct ieee80211_mgmt *mgmt, 1615 const u8 *country_ie, u8 country_ie_len, 1616 const u8 *pwr_constr_ie, 1617 const u8 *cisco_dtpc_ie) 1618 { 1619 bool has_80211h_pwr = false, has_cisco_pwr = false; 1620 int chan_pwr = 0, pwr_reduction_80211h = 0; 1621 int pwr_level_cisco, pwr_level_80211h; 1622 int new_ap_level; 1623 __le16 capab = mgmt->u.probe_resp.capab_info; 1624 1625 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1626 return 0; /* TODO */ 1627 1628 if (country_ie && 1629 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1630 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1631 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1632 sdata, channel, country_ie, country_ie_len, 1633 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1634 pwr_level_80211h = 1635 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1636 } 1637 1638 if (cisco_dtpc_ie) { 1639 ieee80211_find_cisco_dtpc( 1640 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1641 has_cisco_pwr = true; 1642 } 1643 1644 if (!has_80211h_pwr && !has_cisco_pwr) 1645 return 0; 1646 1647 /* If we have both 802.11h and Cisco DTPC, apply both limits 1648 * by picking the smallest of the two power levels advertised. 1649 */ 1650 if (has_80211h_pwr && 1651 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1652 new_ap_level = pwr_level_80211h; 1653 1654 if (sdata->ap_power_level == new_ap_level) 1655 return 0; 1656 1657 sdata_dbg(sdata, 1658 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1659 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1660 sdata->u.mgd.bssid); 1661 } else { /* has_cisco_pwr is always true here. */ 1662 new_ap_level = pwr_level_cisco; 1663 1664 if (sdata->ap_power_level == new_ap_level) 1665 return 0; 1666 1667 sdata_dbg(sdata, 1668 "Limiting TX power to %d dBm as advertised by %pM\n", 1669 pwr_level_cisco, sdata->u.mgd.bssid); 1670 } 1671 1672 sdata->ap_power_level = new_ap_level; 1673 if (__ieee80211_recalc_txpower(sdata)) 1674 return BSS_CHANGED_TXPOWER; 1675 return 0; 1676 } 1677 1678 /* powersave */ 1679 static void ieee80211_enable_ps(struct ieee80211_local *local, 1680 struct ieee80211_sub_if_data *sdata) 1681 { 1682 struct ieee80211_conf *conf = &local->hw.conf; 1683 1684 /* 1685 * If we are scanning right now then the parameters will 1686 * take effect when scan finishes. 1687 */ 1688 if (local->scanning) 1689 return; 1690 1691 if (conf->dynamic_ps_timeout > 0 && 1692 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1693 mod_timer(&local->dynamic_ps_timer, jiffies + 1694 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1695 } else { 1696 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1697 ieee80211_send_nullfunc(local, sdata, true); 1698 1699 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1700 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1701 return; 1702 1703 conf->flags |= IEEE80211_CONF_PS; 1704 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1705 } 1706 } 1707 1708 static void ieee80211_change_ps(struct ieee80211_local *local) 1709 { 1710 struct ieee80211_conf *conf = &local->hw.conf; 1711 1712 if (local->ps_sdata) { 1713 ieee80211_enable_ps(local, local->ps_sdata); 1714 } else if (conf->flags & IEEE80211_CONF_PS) { 1715 conf->flags &= ~IEEE80211_CONF_PS; 1716 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1717 del_timer_sync(&local->dynamic_ps_timer); 1718 cancel_work_sync(&local->dynamic_ps_enable_work); 1719 } 1720 } 1721 1722 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1723 { 1724 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1725 struct sta_info *sta = NULL; 1726 bool authorized = false; 1727 1728 if (!mgd->powersave) 1729 return false; 1730 1731 if (mgd->broken_ap) 1732 return false; 1733 1734 if (!mgd->associated) 1735 return false; 1736 1737 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1738 return false; 1739 1740 if (!mgd->have_beacon) 1741 return false; 1742 1743 rcu_read_lock(); 1744 sta = sta_info_get(sdata, mgd->bssid); 1745 if (sta) 1746 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1747 rcu_read_unlock(); 1748 1749 return authorized; 1750 } 1751 1752 /* need to hold RTNL or interface lock */ 1753 void ieee80211_recalc_ps(struct ieee80211_local *local) 1754 { 1755 struct ieee80211_sub_if_data *sdata, *found = NULL; 1756 int count = 0; 1757 int timeout; 1758 1759 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1760 local->ps_sdata = NULL; 1761 return; 1762 } 1763 1764 list_for_each_entry(sdata, &local->interfaces, list) { 1765 if (!ieee80211_sdata_running(sdata)) 1766 continue; 1767 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1768 /* If an AP vif is found, then disable PS 1769 * by setting the count to zero thereby setting 1770 * ps_sdata to NULL. 1771 */ 1772 count = 0; 1773 break; 1774 } 1775 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1776 continue; 1777 found = sdata; 1778 count++; 1779 } 1780 1781 if (count == 1 && ieee80211_powersave_allowed(found)) { 1782 u8 dtimper = found->u.mgd.dtim_period; 1783 1784 timeout = local->dynamic_ps_forced_timeout; 1785 if (timeout < 0) 1786 timeout = 100; 1787 local->hw.conf.dynamic_ps_timeout = timeout; 1788 1789 /* If the TIM IE is invalid, pretend the value is 1 */ 1790 if (!dtimper) 1791 dtimper = 1; 1792 1793 local->hw.conf.ps_dtim_period = dtimper; 1794 local->ps_sdata = found; 1795 } else { 1796 local->ps_sdata = NULL; 1797 } 1798 1799 ieee80211_change_ps(local); 1800 } 1801 1802 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1803 { 1804 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1805 1806 if (sdata->vif.bss_conf.ps != ps_allowed) { 1807 sdata->vif.bss_conf.ps = ps_allowed; 1808 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1809 } 1810 } 1811 1812 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1813 { 1814 struct ieee80211_local *local = 1815 container_of(work, struct ieee80211_local, 1816 dynamic_ps_disable_work); 1817 1818 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1819 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1820 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1821 } 1822 1823 ieee80211_wake_queues_by_reason(&local->hw, 1824 IEEE80211_MAX_QUEUE_MAP, 1825 IEEE80211_QUEUE_STOP_REASON_PS, 1826 false); 1827 } 1828 1829 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1830 { 1831 struct ieee80211_local *local = 1832 container_of(work, struct ieee80211_local, 1833 dynamic_ps_enable_work); 1834 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1835 struct ieee80211_if_managed *ifmgd; 1836 unsigned long flags; 1837 int q; 1838 1839 /* can only happen when PS was just disabled anyway */ 1840 if (!sdata) 1841 return; 1842 1843 ifmgd = &sdata->u.mgd; 1844 1845 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1846 return; 1847 1848 if (local->hw.conf.dynamic_ps_timeout > 0) { 1849 /* don't enter PS if TX frames are pending */ 1850 if (drv_tx_frames_pending(local)) { 1851 mod_timer(&local->dynamic_ps_timer, jiffies + 1852 msecs_to_jiffies( 1853 local->hw.conf.dynamic_ps_timeout)); 1854 return; 1855 } 1856 1857 /* 1858 * transmission can be stopped by others which leads to 1859 * dynamic_ps_timer expiry. Postpone the ps timer if it 1860 * is not the actual idle state. 1861 */ 1862 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1863 for (q = 0; q < local->hw.queues; q++) { 1864 if (local->queue_stop_reasons[q]) { 1865 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1866 flags); 1867 mod_timer(&local->dynamic_ps_timer, jiffies + 1868 msecs_to_jiffies( 1869 local->hw.conf.dynamic_ps_timeout)); 1870 return; 1871 } 1872 } 1873 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1874 } 1875 1876 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1877 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1878 if (drv_tx_frames_pending(local)) { 1879 mod_timer(&local->dynamic_ps_timer, jiffies + 1880 msecs_to_jiffies( 1881 local->hw.conf.dynamic_ps_timeout)); 1882 } else { 1883 ieee80211_send_nullfunc(local, sdata, true); 1884 /* Flush to get the tx status of nullfunc frame */ 1885 ieee80211_flush_queues(local, sdata, false); 1886 } 1887 } 1888 1889 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1890 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1891 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1892 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1893 local->hw.conf.flags |= IEEE80211_CONF_PS; 1894 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1895 } 1896 } 1897 1898 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1899 { 1900 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1901 1902 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1903 } 1904 1905 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1906 { 1907 struct delayed_work *delayed_work = to_delayed_work(work); 1908 struct ieee80211_sub_if_data *sdata = 1909 container_of(delayed_work, struct ieee80211_sub_if_data, 1910 dfs_cac_timer_work); 1911 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1912 1913 mutex_lock(&sdata->local->mtx); 1914 if (sdata->wdev.cac_started) { 1915 ieee80211_vif_release_channel(sdata); 1916 cfg80211_cac_event(sdata->dev, &chandef, 1917 NL80211_RADAR_CAC_FINISHED, 1918 GFP_KERNEL); 1919 } 1920 mutex_unlock(&sdata->local->mtx); 1921 } 1922 1923 static bool 1924 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1925 { 1926 struct ieee80211_local *local = sdata->local; 1927 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1928 bool ret = false; 1929 int ac; 1930 1931 if (local->hw.queues < IEEE80211_NUM_ACS) 1932 return false; 1933 1934 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1935 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1936 int non_acm_ac; 1937 unsigned long now = jiffies; 1938 1939 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1940 tx_tspec->admitted_time && 1941 time_after(now, tx_tspec->time_slice_start + HZ)) { 1942 tx_tspec->consumed_tx_time = 0; 1943 tx_tspec->time_slice_start = now; 1944 1945 if (tx_tspec->downgraded) 1946 tx_tspec->action = 1947 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1948 } 1949 1950 switch (tx_tspec->action) { 1951 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1952 /* take the original parameters */ 1953 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1954 sdata_err(sdata, 1955 "failed to set TX queue parameters for queue %d\n", 1956 ac); 1957 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1958 tx_tspec->downgraded = false; 1959 ret = true; 1960 break; 1961 case TX_TSPEC_ACTION_DOWNGRADE: 1962 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1963 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1964 ret = true; 1965 break; 1966 } 1967 /* downgrade next lower non-ACM AC */ 1968 for (non_acm_ac = ac + 1; 1969 non_acm_ac < IEEE80211_NUM_ACS; 1970 non_acm_ac++) 1971 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1972 break; 1973 /* Usually the loop will result in using BK even if it 1974 * requires admission control, but such a configuration 1975 * makes no sense and we have to transmit somehow - the 1976 * AC selection does the same thing. 1977 * If we started out trying to downgrade from BK, then 1978 * the extra condition here might be needed. 1979 */ 1980 if (non_acm_ac >= IEEE80211_NUM_ACS) 1981 non_acm_ac = IEEE80211_AC_BK; 1982 if (drv_conf_tx(local, sdata, ac, 1983 &sdata->tx_conf[non_acm_ac])) 1984 sdata_err(sdata, 1985 "failed to set TX queue parameters for queue %d\n", 1986 ac); 1987 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1988 ret = true; 1989 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1990 tx_tspec->time_slice_start + HZ - now + 1); 1991 break; 1992 case TX_TSPEC_ACTION_NONE: 1993 /* nothing now */ 1994 break; 1995 } 1996 } 1997 1998 return ret; 1999 } 2000 2001 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2002 { 2003 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2004 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 2005 } 2006 2007 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2008 { 2009 struct ieee80211_sub_if_data *sdata; 2010 2011 sdata = container_of(work, struct ieee80211_sub_if_data, 2012 u.mgd.tx_tspec_wk.work); 2013 ieee80211_sta_handle_tspec_ac_params(sdata); 2014 } 2015 2016 /* MLME */ 2017 static bool 2018 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2019 struct ieee80211_sub_if_data *sdata, 2020 const u8 *wmm_param, size_t wmm_param_len, 2021 const struct ieee80211_mu_edca_param_set *mu_edca) 2022 { 2023 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2025 size_t left; 2026 int count, mu_edca_count, ac; 2027 const u8 *pos; 2028 u8 uapsd_queues = 0; 2029 2030 if (!local->ops->conf_tx) 2031 return false; 2032 2033 if (local->hw.queues < IEEE80211_NUM_ACS) 2034 return false; 2035 2036 if (!wmm_param) 2037 return false; 2038 2039 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2040 return false; 2041 2042 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2043 uapsd_queues = ifmgd->uapsd_queues; 2044 2045 count = wmm_param[6] & 0x0f; 2046 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2047 * if mu_edca was preset before and now it disappeared tell 2048 * the driver about it. 2049 */ 2050 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2051 if (count == ifmgd->wmm_last_param_set && 2052 mu_edca_count == ifmgd->mu_edca_last_param_set) 2053 return false; 2054 ifmgd->wmm_last_param_set = count; 2055 ifmgd->mu_edca_last_param_set = mu_edca_count; 2056 2057 pos = wmm_param + 8; 2058 left = wmm_param_len - 8; 2059 2060 memset(¶ms, 0, sizeof(params)); 2061 2062 sdata->wmm_acm = 0; 2063 for (; left >= 4; left -= 4, pos += 4) { 2064 int aci = (pos[0] >> 5) & 0x03; 2065 int acm = (pos[0] >> 4) & 0x01; 2066 bool uapsd = false; 2067 2068 switch (aci) { 2069 case 1: /* AC_BK */ 2070 ac = IEEE80211_AC_BK; 2071 if (acm) 2072 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2073 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2074 uapsd = true; 2075 params[ac].mu_edca = !!mu_edca; 2076 if (mu_edca) 2077 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2078 break; 2079 case 2: /* AC_VI */ 2080 ac = IEEE80211_AC_VI; 2081 if (acm) 2082 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2083 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2084 uapsd = true; 2085 params[ac].mu_edca = !!mu_edca; 2086 if (mu_edca) 2087 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2088 break; 2089 case 3: /* AC_VO */ 2090 ac = IEEE80211_AC_VO; 2091 if (acm) 2092 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2093 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2094 uapsd = true; 2095 params[ac].mu_edca = !!mu_edca; 2096 if (mu_edca) 2097 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2098 break; 2099 case 0: /* AC_BE */ 2100 default: 2101 ac = IEEE80211_AC_BE; 2102 if (acm) 2103 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2104 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2105 uapsd = true; 2106 params[ac].mu_edca = !!mu_edca; 2107 if (mu_edca) 2108 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2109 break; 2110 } 2111 2112 params[ac].aifs = pos[0] & 0x0f; 2113 2114 if (params[ac].aifs < 2) { 2115 sdata_info(sdata, 2116 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2117 params[ac].aifs, aci); 2118 params[ac].aifs = 2; 2119 } 2120 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2121 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2122 params[ac].txop = get_unaligned_le16(pos + 2); 2123 params[ac].acm = acm; 2124 params[ac].uapsd = uapsd; 2125 2126 if (params[ac].cw_min == 0 || 2127 params[ac].cw_min > params[ac].cw_max) { 2128 sdata_info(sdata, 2129 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2130 params[ac].cw_min, params[ac].cw_max, aci); 2131 return false; 2132 } 2133 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2134 } 2135 2136 /* WMM specification requires all 4 ACIs. */ 2137 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2138 if (params[ac].cw_min == 0) { 2139 sdata_info(sdata, 2140 "AP has invalid WMM params (missing AC %d), using defaults\n", 2141 ac); 2142 return false; 2143 } 2144 } 2145 2146 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2147 mlme_dbg(sdata, 2148 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2149 ac, params[ac].acm, 2150 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2151 params[ac].txop, params[ac].uapsd, 2152 ifmgd->tx_tspec[ac].downgraded); 2153 sdata->tx_conf[ac] = params[ac]; 2154 if (!ifmgd->tx_tspec[ac].downgraded && 2155 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2156 sdata_err(sdata, 2157 "failed to set TX queue parameters for AC %d\n", 2158 ac); 2159 } 2160 2161 /* enable WMM or activate new settings */ 2162 sdata->vif.bss_conf.qos = true; 2163 return true; 2164 } 2165 2166 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2167 { 2168 lockdep_assert_held(&sdata->local->mtx); 2169 2170 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2171 ieee80211_run_deferred_scan(sdata->local); 2172 } 2173 2174 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2175 { 2176 mutex_lock(&sdata->local->mtx); 2177 __ieee80211_stop_poll(sdata); 2178 mutex_unlock(&sdata->local->mtx); 2179 } 2180 2181 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2182 u16 capab, bool erp_valid, u8 erp) 2183 { 2184 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2185 struct ieee80211_supported_band *sband; 2186 u32 changed = 0; 2187 bool use_protection; 2188 bool use_short_preamble; 2189 bool use_short_slot; 2190 2191 sband = ieee80211_get_sband(sdata); 2192 if (!sband) 2193 return changed; 2194 2195 if (erp_valid) { 2196 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2197 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2198 } else { 2199 use_protection = false; 2200 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2201 } 2202 2203 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2204 if (sband->band == NL80211_BAND_5GHZ || 2205 sband->band == NL80211_BAND_6GHZ) 2206 use_short_slot = true; 2207 2208 if (use_protection != bss_conf->use_cts_prot) { 2209 bss_conf->use_cts_prot = use_protection; 2210 changed |= BSS_CHANGED_ERP_CTS_PROT; 2211 } 2212 2213 if (use_short_preamble != bss_conf->use_short_preamble) { 2214 bss_conf->use_short_preamble = use_short_preamble; 2215 changed |= BSS_CHANGED_ERP_PREAMBLE; 2216 } 2217 2218 if (use_short_slot != bss_conf->use_short_slot) { 2219 bss_conf->use_short_slot = use_short_slot; 2220 changed |= BSS_CHANGED_ERP_SLOT; 2221 } 2222 2223 return changed; 2224 } 2225 2226 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2227 struct cfg80211_bss *cbss, 2228 u32 bss_info_changed) 2229 { 2230 struct ieee80211_bss *bss = (void *)cbss->priv; 2231 struct ieee80211_local *local = sdata->local; 2232 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2233 2234 bss_info_changed |= BSS_CHANGED_ASSOC; 2235 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2236 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2237 2238 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2239 beacon_loss_count * bss_conf->beacon_int)); 2240 2241 sdata->u.mgd.associated = cbss; 2242 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2243 2244 ieee80211_check_rate_mask(sdata); 2245 2246 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2247 2248 if (sdata->vif.p2p || 2249 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2250 const struct cfg80211_bss_ies *ies; 2251 2252 rcu_read_lock(); 2253 ies = rcu_dereference(cbss->ies); 2254 if (ies) { 2255 int ret; 2256 2257 ret = cfg80211_get_p2p_attr( 2258 ies->data, ies->len, 2259 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2260 (u8 *) &bss_conf->p2p_noa_attr, 2261 sizeof(bss_conf->p2p_noa_attr)); 2262 if (ret >= 2) { 2263 sdata->u.mgd.p2p_noa_index = 2264 bss_conf->p2p_noa_attr.index; 2265 bss_info_changed |= BSS_CHANGED_P2P_PS; 2266 } 2267 } 2268 rcu_read_unlock(); 2269 } 2270 2271 /* just to be sure */ 2272 ieee80211_stop_poll(sdata); 2273 2274 ieee80211_led_assoc(local, 1); 2275 2276 if (sdata->u.mgd.have_beacon) { 2277 /* 2278 * If the AP is buggy we may get here with no DTIM period 2279 * known, so assume it's 1 which is the only safe assumption 2280 * in that case, although if the TIM IE is broken powersave 2281 * probably just won't work at all. 2282 */ 2283 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2284 bss_conf->beacon_rate = bss->beacon_rate; 2285 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2286 } else { 2287 bss_conf->beacon_rate = NULL; 2288 bss_conf->dtim_period = 0; 2289 } 2290 2291 bss_conf->assoc = 1; 2292 2293 /* Tell the driver to monitor connection quality (if supported) */ 2294 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2295 bss_conf->cqm_rssi_thold) 2296 bss_info_changed |= BSS_CHANGED_CQM; 2297 2298 /* Enable ARP filtering */ 2299 if (bss_conf->arp_addr_cnt) 2300 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2301 2302 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2303 2304 mutex_lock(&local->iflist_mtx); 2305 ieee80211_recalc_ps(local); 2306 mutex_unlock(&local->iflist_mtx); 2307 2308 ieee80211_recalc_smps(sdata); 2309 ieee80211_recalc_ps_vif(sdata); 2310 2311 netif_carrier_on(sdata->dev); 2312 } 2313 2314 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2315 u16 stype, u16 reason, bool tx, 2316 u8 *frame_buf) 2317 { 2318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2319 struct ieee80211_local *local = sdata->local; 2320 u32 changed = 0; 2321 2322 sdata_assert_lock(sdata); 2323 2324 if (WARN_ON_ONCE(tx && !frame_buf)) 2325 return; 2326 2327 if (WARN_ON(!ifmgd->associated)) 2328 return; 2329 2330 ieee80211_stop_poll(sdata); 2331 2332 ifmgd->associated = NULL; 2333 netif_carrier_off(sdata->dev); 2334 2335 /* 2336 * if we want to get out of ps before disassoc (why?) we have 2337 * to do it before sending disassoc, as otherwise the null-packet 2338 * won't be valid. 2339 */ 2340 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2341 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2342 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2343 } 2344 local->ps_sdata = NULL; 2345 2346 /* disable per-vif ps */ 2347 ieee80211_recalc_ps_vif(sdata); 2348 2349 /* make sure ongoing transmission finishes */ 2350 synchronize_net(); 2351 2352 /* 2353 * drop any frame before deauth/disassoc, this can be data or 2354 * management frame. Since we are disconnecting, we should not 2355 * insist sending these frames which can take time and delay 2356 * the disconnection and possible the roaming. 2357 */ 2358 if (tx) 2359 ieee80211_flush_queues(local, sdata, true); 2360 2361 /* deauthenticate/disassociate now */ 2362 if (tx || frame_buf) { 2363 /* 2364 * In multi channel scenarios guarantee that the virtual 2365 * interface is granted immediate airtime to transmit the 2366 * deauthentication frame by calling mgd_prepare_tx, if the 2367 * driver requested so. 2368 */ 2369 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2370 !ifmgd->have_beacon) 2371 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2372 2373 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2374 ifmgd->bssid, stype, reason, 2375 tx, frame_buf); 2376 } 2377 2378 /* flush out frame - make sure the deauth was actually sent */ 2379 if (tx) 2380 ieee80211_flush_queues(local, sdata, false); 2381 2382 /* clear bssid only after building the needed mgmt frames */ 2383 eth_zero_addr(ifmgd->bssid); 2384 2385 /* remove AP and TDLS peers */ 2386 sta_info_flush(sdata); 2387 2388 /* finally reset all BSS / config parameters */ 2389 changed |= ieee80211_reset_erp_info(sdata); 2390 2391 ieee80211_led_assoc(local, 0); 2392 changed |= BSS_CHANGED_ASSOC; 2393 sdata->vif.bss_conf.assoc = false; 2394 2395 ifmgd->p2p_noa_index = -1; 2396 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2397 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2398 2399 /* on the next assoc, re-program HT/VHT parameters */ 2400 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2401 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2402 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2403 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2404 2405 /* reset MU-MIMO ownership and group data */ 2406 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2407 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2408 memset(sdata->vif.bss_conf.mu_group.position, 0, 2409 sizeof(sdata->vif.bss_conf.mu_group.position)); 2410 changed |= BSS_CHANGED_MU_GROUPS; 2411 sdata->vif.mu_mimo_owner = false; 2412 2413 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2414 2415 del_timer_sync(&local->dynamic_ps_timer); 2416 cancel_work_sync(&local->dynamic_ps_enable_work); 2417 2418 /* Disable ARP filtering */ 2419 if (sdata->vif.bss_conf.arp_addr_cnt) 2420 changed |= BSS_CHANGED_ARP_FILTER; 2421 2422 sdata->vif.bss_conf.qos = false; 2423 changed |= BSS_CHANGED_QOS; 2424 2425 /* The BSSID (not really interesting) and HT changed */ 2426 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2427 ieee80211_bss_info_change_notify(sdata, changed); 2428 2429 /* disassociated - set to defaults now */ 2430 ieee80211_set_wmm_default(sdata, false, false); 2431 2432 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2433 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2434 del_timer_sync(&sdata->u.mgd.timer); 2435 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2436 2437 sdata->vif.bss_conf.dtim_period = 0; 2438 sdata->vif.bss_conf.beacon_rate = NULL; 2439 2440 ifmgd->have_beacon = false; 2441 2442 ifmgd->flags = 0; 2443 mutex_lock(&local->mtx); 2444 ieee80211_vif_release_channel(sdata); 2445 2446 sdata->vif.csa_active = false; 2447 ifmgd->csa_waiting_bcn = false; 2448 ifmgd->csa_ignored_same_chan = false; 2449 if (sdata->csa_block_tx) { 2450 ieee80211_wake_vif_queues(local, sdata, 2451 IEEE80211_QUEUE_STOP_REASON_CSA); 2452 sdata->csa_block_tx = false; 2453 } 2454 mutex_unlock(&local->mtx); 2455 2456 /* existing TX TSPEC sessions no longer exist */ 2457 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2458 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2459 2460 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2461 } 2462 2463 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2464 { 2465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2466 struct ieee80211_local *local = sdata->local; 2467 2468 mutex_lock(&local->mtx); 2469 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2470 goto out; 2471 2472 __ieee80211_stop_poll(sdata); 2473 2474 mutex_lock(&local->iflist_mtx); 2475 ieee80211_recalc_ps(local); 2476 mutex_unlock(&local->iflist_mtx); 2477 2478 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2479 goto out; 2480 2481 /* 2482 * We've received a probe response, but are not sure whether 2483 * we have or will be receiving any beacons or data, so let's 2484 * schedule the timers again, just in case. 2485 */ 2486 ieee80211_sta_reset_beacon_monitor(sdata); 2487 2488 mod_timer(&ifmgd->conn_mon_timer, 2489 round_jiffies_up(jiffies + 2490 IEEE80211_CONNECTION_IDLE_TIME)); 2491 out: 2492 mutex_unlock(&local->mtx); 2493 } 2494 2495 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2496 struct ieee80211_hdr *hdr, 2497 u16 tx_time) 2498 { 2499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2500 u16 tid = ieee80211_get_tid(hdr); 2501 int ac = ieee80211_ac_from_tid(tid); 2502 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2503 unsigned long now = jiffies; 2504 2505 if (likely(!tx_tspec->admitted_time)) 2506 return; 2507 2508 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2509 tx_tspec->consumed_tx_time = 0; 2510 tx_tspec->time_slice_start = now; 2511 2512 if (tx_tspec->downgraded) { 2513 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2514 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2515 } 2516 } 2517 2518 if (tx_tspec->downgraded) 2519 return; 2520 2521 tx_tspec->consumed_tx_time += tx_time; 2522 2523 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2524 tx_tspec->downgraded = true; 2525 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2526 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2527 } 2528 } 2529 2530 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2531 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2532 { 2533 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2534 2535 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2536 !sdata->u.mgd.probe_send_count) 2537 return; 2538 2539 if (ack) 2540 sdata->u.mgd.probe_send_count = 0; 2541 else 2542 sdata->u.mgd.nullfunc_failed = true; 2543 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2544 } 2545 2546 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2547 const u8 *src, const u8 *dst, 2548 const u8 *ssid, size_t ssid_len, 2549 struct ieee80211_channel *channel) 2550 { 2551 struct sk_buff *skb; 2552 2553 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2554 ssid, ssid_len, NULL, 0, 2555 IEEE80211_PROBE_FLAG_DIRECTED); 2556 if (skb) 2557 ieee80211_tx_skb(sdata, skb); 2558 } 2559 2560 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2561 { 2562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2563 const u8 *ssid; 2564 u8 *dst = ifmgd->associated->bssid; 2565 u8 unicast_limit = max(1, max_probe_tries - 3); 2566 struct sta_info *sta; 2567 2568 /* 2569 * Try sending broadcast probe requests for the last three 2570 * probe requests after the first ones failed since some 2571 * buggy APs only support broadcast probe requests. 2572 */ 2573 if (ifmgd->probe_send_count >= unicast_limit) 2574 dst = NULL; 2575 2576 /* 2577 * When the hardware reports an accurate Tx ACK status, it's 2578 * better to send a nullfunc frame instead of a probe request, 2579 * as it will kick us off the AP quickly if we aren't associated 2580 * anymore. The timeout will be reset if the frame is ACKed by 2581 * the AP. 2582 */ 2583 ifmgd->probe_send_count++; 2584 2585 if (dst) { 2586 mutex_lock(&sdata->local->sta_mtx); 2587 sta = sta_info_get(sdata, dst); 2588 if (!WARN_ON(!sta)) 2589 ieee80211_check_fast_rx(sta); 2590 mutex_unlock(&sdata->local->sta_mtx); 2591 } 2592 2593 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2594 ifmgd->nullfunc_failed = false; 2595 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2596 ifmgd->probe_send_count--; 2597 else 2598 ieee80211_send_nullfunc(sdata->local, sdata, false); 2599 } else { 2600 int ssid_len; 2601 2602 rcu_read_lock(); 2603 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2604 if (WARN_ON_ONCE(ssid == NULL)) 2605 ssid_len = 0; 2606 else 2607 ssid_len = ssid[1]; 2608 2609 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2610 ssid + 2, ssid_len, 2611 ifmgd->associated->channel); 2612 rcu_read_unlock(); 2613 } 2614 2615 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2616 run_again(sdata, ifmgd->probe_timeout); 2617 } 2618 2619 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2620 bool beacon) 2621 { 2622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2623 bool already = false; 2624 2625 if (!ieee80211_sdata_running(sdata)) 2626 return; 2627 2628 sdata_lock(sdata); 2629 2630 if (!ifmgd->associated) 2631 goto out; 2632 2633 mutex_lock(&sdata->local->mtx); 2634 2635 if (sdata->local->tmp_channel || sdata->local->scanning) { 2636 mutex_unlock(&sdata->local->mtx); 2637 goto out; 2638 } 2639 2640 if (beacon) { 2641 mlme_dbg_ratelimited(sdata, 2642 "detected beacon loss from AP (missed %d beacons) - probing\n", 2643 beacon_loss_count); 2644 2645 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2646 } 2647 2648 /* 2649 * The driver/our work has already reported this event or the 2650 * connection monitoring has kicked in and we have already sent 2651 * a probe request. Or maybe the AP died and the driver keeps 2652 * reporting until we disassociate... 2653 * 2654 * In either case we have to ignore the current call to this 2655 * function (except for setting the correct probe reason bit) 2656 * because otherwise we would reset the timer every time and 2657 * never check whether we received a probe response! 2658 */ 2659 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2660 already = true; 2661 2662 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2663 2664 mutex_unlock(&sdata->local->mtx); 2665 2666 if (already) 2667 goto out; 2668 2669 mutex_lock(&sdata->local->iflist_mtx); 2670 ieee80211_recalc_ps(sdata->local); 2671 mutex_unlock(&sdata->local->iflist_mtx); 2672 2673 ifmgd->probe_send_count = 0; 2674 ieee80211_mgd_probe_ap_send(sdata); 2675 out: 2676 sdata_unlock(sdata); 2677 } 2678 2679 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2680 struct ieee80211_vif *vif) 2681 { 2682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2684 struct cfg80211_bss *cbss; 2685 struct sk_buff *skb; 2686 const u8 *ssid; 2687 int ssid_len; 2688 2689 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2690 return NULL; 2691 2692 sdata_assert_lock(sdata); 2693 2694 if (ifmgd->associated) 2695 cbss = ifmgd->associated; 2696 else if (ifmgd->auth_data) 2697 cbss = ifmgd->auth_data->bss; 2698 else if (ifmgd->assoc_data) 2699 cbss = ifmgd->assoc_data->bss; 2700 else 2701 return NULL; 2702 2703 rcu_read_lock(); 2704 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2705 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2706 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2707 ssid_len = 0; 2708 else 2709 ssid_len = ssid[1]; 2710 2711 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2712 (u32) -1, cbss->channel, 2713 ssid + 2, ssid_len, 2714 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2715 rcu_read_unlock(); 2716 2717 return skb; 2718 } 2719 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2720 2721 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2722 const u8 *buf, size_t len, bool tx, 2723 u16 reason) 2724 { 2725 struct ieee80211_event event = { 2726 .type = MLME_EVENT, 2727 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2728 .u.mlme.reason = reason, 2729 }; 2730 2731 if (tx) 2732 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2733 else 2734 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2735 2736 drv_event_callback(sdata->local, sdata, &event); 2737 } 2738 2739 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2740 { 2741 struct ieee80211_local *local = sdata->local; 2742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2743 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2744 bool tx; 2745 2746 sdata_lock(sdata); 2747 if (!ifmgd->associated) { 2748 sdata_unlock(sdata); 2749 return; 2750 } 2751 2752 tx = !sdata->csa_block_tx; 2753 2754 /* AP is probably out of range (or not reachable for another reason) so 2755 * remove the bss struct for that AP. 2756 */ 2757 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2758 2759 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2760 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2761 tx, frame_buf); 2762 mutex_lock(&local->mtx); 2763 sdata->vif.csa_active = false; 2764 ifmgd->csa_waiting_bcn = false; 2765 if (sdata->csa_block_tx) { 2766 ieee80211_wake_vif_queues(local, sdata, 2767 IEEE80211_QUEUE_STOP_REASON_CSA); 2768 sdata->csa_block_tx = false; 2769 } 2770 mutex_unlock(&local->mtx); 2771 2772 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2773 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2774 2775 sdata_unlock(sdata); 2776 } 2777 2778 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2779 { 2780 struct ieee80211_sub_if_data *sdata = 2781 container_of(work, struct ieee80211_sub_if_data, 2782 u.mgd.beacon_connection_loss_work); 2783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2784 2785 if (ifmgd->associated) 2786 ifmgd->beacon_loss_count++; 2787 2788 if (ifmgd->connection_loss) { 2789 sdata_info(sdata, "Connection to AP %pM lost\n", 2790 ifmgd->bssid); 2791 __ieee80211_disconnect(sdata); 2792 } else { 2793 ieee80211_mgd_probe_ap(sdata, true); 2794 } 2795 } 2796 2797 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2798 { 2799 struct ieee80211_sub_if_data *sdata = 2800 container_of(work, struct ieee80211_sub_if_data, 2801 u.mgd.csa_connection_drop_work); 2802 2803 __ieee80211_disconnect(sdata); 2804 } 2805 2806 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2807 { 2808 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2809 struct ieee80211_hw *hw = &sdata->local->hw; 2810 2811 trace_api_beacon_loss(sdata); 2812 2813 sdata->u.mgd.connection_loss = false; 2814 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2815 } 2816 EXPORT_SYMBOL(ieee80211_beacon_loss); 2817 2818 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2819 { 2820 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2821 struct ieee80211_hw *hw = &sdata->local->hw; 2822 2823 trace_api_connection_loss(sdata); 2824 2825 sdata->u.mgd.connection_loss = true; 2826 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2827 } 2828 EXPORT_SYMBOL(ieee80211_connection_loss); 2829 2830 2831 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2832 bool assoc) 2833 { 2834 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2835 2836 sdata_assert_lock(sdata); 2837 2838 if (!assoc) { 2839 /* 2840 * we are not authenticated yet, the only timer that could be 2841 * running is the timeout for the authentication response which 2842 * which is not relevant anymore. 2843 */ 2844 del_timer_sync(&sdata->u.mgd.timer); 2845 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2846 2847 eth_zero_addr(sdata->u.mgd.bssid); 2848 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2849 sdata->u.mgd.flags = 0; 2850 mutex_lock(&sdata->local->mtx); 2851 ieee80211_vif_release_channel(sdata); 2852 mutex_unlock(&sdata->local->mtx); 2853 } 2854 2855 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2856 kfree(auth_data); 2857 sdata->u.mgd.auth_data = NULL; 2858 } 2859 2860 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2861 bool assoc, bool abandon) 2862 { 2863 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2864 2865 sdata_assert_lock(sdata); 2866 2867 if (!assoc) { 2868 /* 2869 * we are not associated yet, the only timer that could be 2870 * running is the timeout for the association response which 2871 * which is not relevant anymore. 2872 */ 2873 del_timer_sync(&sdata->u.mgd.timer); 2874 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2875 2876 eth_zero_addr(sdata->u.mgd.bssid); 2877 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2878 sdata->u.mgd.flags = 0; 2879 sdata->vif.mu_mimo_owner = false; 2880 2881 mutex_lock(&sdata->local->mtx); 2882 ieee80211_vif_release_channel(sdata); 2883 mutex_unlock(&sdata->local->mtx); 2884 2885 if (abandon) 2886 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2887 } 2888 2889 kfree(assoc_data); 2890 sdata->u.mgd.assoc_data = NULL; 2891 } 2892 2893 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2894 struct ieee80211_mgmt *mgmt, size_t len) 2895 { 2896 struct ieee80211_local *local = sdata->local; 2897 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2898 u8 *pos; 2899 struct ieee802_11_elems elems; 2900 u32 tx_flags = 0; 2901 2902 pos = mgmt->u.auth.variable; 2903 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2904 mgmt->bssid, auth_data->bss->bssid); 2905 if (!elems.challenge) 2906 return; 2907 auth_data->expected_transaction = 4; 2908 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2909 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2910 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2911 IEEE80211_TX_INTFL_MLME_CONN_TX; 2912 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2913 elems.challenge - 2, elems.challenge_len + 2, 2914 auth_data->bss->bssid, auth_data->bss->bssid, 2915 auth_data->key, auth_data->key_len, 2916 auth_data->key_idx, tx_flags); 2917 } 2918 2919 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2920 const u8 *bssid) 2921 { 2922 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2923 struct sta_info *sta; 2924 bool result = true; 2925 2926 sdata_info(sdata, "authenticated\n"); 2927 ifmgd->auth_data->done = true; 2928 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2929 ifmgd->auth_data->timeout_started = true; 2930 run_again(sdata, ifmgd->auth_data->timeout); 2931 2932 /* move station state to auth */ 2933 mutex_lock(&sdata->local->sta_mtx); 2934 sta = sta_info_get(sdata, bssid); 2935 if (!sta) { 2936 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2937 result = false; 2938 goto out; 2939 } 2940 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2941 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2942 result = false; 2943 goto out; 2944 } 2945 2946 out: 2947 mutex_unlock(&sdata->local->sta_mtx); 2948 return result; 2949 } 2950 2951 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2952 struct ieee80211_mgmt *mgmt, size_t len) 2953 { 2954 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2955 u8 bssid[ETH_ALEN]; 2956 u16 auth_alg, auth_transaction, status_code; 2957 struct ieee80211_event event = { 2958 .type = MLME_EVENT, 2959 .u.mlme.data = AUTH_EVENT, 2960 }; 2961 2962 sdata_assert_lock(sdata); 2963 2964 if (len < 24 + 6) 2965 return; 2966 2967 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2968 return; 2969 2970 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2971 2972 if (!ether_addr_equal(bssid, mgmt->bssid)) 2973 return; 2974 2975 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2976 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2977 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2978 2979 if (auth_alg != ifmgd->auth_data->algorithm || 2980 (auth_alg != WLAN_AUTH_SAE && 2981 auth_transaction != ifmgd->auth_data->expected_transaction) || 2982 (auth_alg == WLAN_AUTH_SAE && 2983 (auth_transaction < ifmgd->auth_data->expected_transaction || 2984 auth_transaction > 2))) { 2985 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2986 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2987 auth_transaction, 2988 ifmgd->auth_data->expected_transaction); 2989 return; 2990 } 2991 2992 if (status_code != WLAN_STATUS_SUCCESS) { 2993 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2994 2995 if (auth_alg == WLAN_AUTH_SAE && 2996 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 2997 (auth_transaction == 1 && 2998 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 2999 status_code == WLAN_STATUS_SAE_PK)))) 3000 return; 3001 3002 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3003 mgmt->sa, status_code); 3004 ieee80211_destroy_auth_data(sdata, false); 3005 event.u.mlme.status = MLME_DENIED; 3006 event.u.mlme.reason = status_code; 3007 drv_event_callback(sdata->local, sdata, &event); 3008 return; 3009 } 3010 3011 switch (ifmgd->auth_data->algorithm) { 3012 case WLAN_AUTH_OPEN: 3013 case WLAN_AUTH_LEAP: 3014 case WLAN_AUTH_FT: 3015 case WLAN_AUTH_SAE: 3016 case WLAN_AUTH_FILS_SK: 3017 case WLAN_AUTH_FILS_SK_PFS: 3018 case WLAN_AUTH_FILS_PK: 3019 break; 3020 case WLAN_AUTH_SHARED_KEY: 3021 if (ifmgd->auth_data->expected_transaction != 4) { 3022 ieee80211_auth_challenge(sdata, mgmt, len); 3023 /* need another frame */ 3024 return; 3025 } 3026 break; 3027 default: 3028 WARN_ONCE(1, "invalid auth alg %d", 3029 ifmgd->auth_data->algorithm); 3030 return; 3031 } 3032 3033 event.u.mlme.status = MLME_SUCCESS; 3034 drv_event_callback(sdata->local, sdata, &event); 3035 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3036 (auth_transaction == 2 && 3037 ifmgd->auth_data->expected_transaction == 2)) { 3038 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3039 return; /* ignore frame -- wait for timeout */ 3040 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3041 auth_transaction == 2) { 3042 sdata_info(sdata, "SAE peer confirmed\n"); 3043 ifmgd->auth_data->peer_confirmed = true; 3044 } 3045 3046 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3047 } 3048 3049 #define case_WLAN(type) \ 3050 case WLAN_REASON_##type: return #type 3051 3052 const char *ieee80211_get_reason_code_string(u16 reason_code) 3053 { 3054 switch (reason_code) { 3055 case_WLAN(UNSPECIFIED); 3056 case_WLAN(PREV_AUTH_NOT_VALID); 3057 case_WLAN(DEAUTH_LEAVING); 3058 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3059 case_WLAN(DISASSOC_AP_BUSY); 3060 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3061 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3062 case_WLAN(DISASSOC_STA_HAS_LEFT); 3063 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3064 case_WLAN(DISASSOC_BAD_POWER); 3065 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3066 case_WLAN(INVALID_IE); 3067 case_WLAN(MIC_FAILURE); 3068 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3069 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3070 case_WLAN(IE_DIFFERENT); 3071 case_WLAN(INVALID_GROUP_CIPHER); 3072 case_WLAN(INVALID_PAIRWISE_CIPHER); 3073 case_WLAN(INVALID_AKMP); 3074 case_WLAN(UNSUPP_RSN_VERSION); 3075 case_WLAN(INVALID_RSN_IE_CAP); 3076 case_WLAN(IEEE8021X_FAILED); 3077 case_WLAN(CIPHER_SUITE_REJECTED); 3078 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3079 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3080 case_WLAN(DISASSOC_LOW_ACK); 3081 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3082 case_WLAN(QSTA_LEAVE_QBSS); 3083 case_WLAN(QSTA_NOT_USE); 3084 case_WLAN(QSTA_REQUIRE_SETUP); 3085 case_WLAN(QSTA_TIMEOUT); 3086 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3087 case_WLAN(MESH_PEER_CANCELED); 3088 case_WLAN(MESH_MAX_PEERS); 3089 case_WLAN(MESH_CONFIG); 3090 case_WLAN(MESH_CLOSE); 3091 case_WLAN(MESH_MAX_RETRIES); 3092 case_WLAN(MESH_CONFIRM_TIMEOUT); 3093 case_WLAN(MESH_INVALID_GTK); 3094 case_WLAN(MESH_INCONSISTENT_PARAM); 3095 case_WLAN(MESH_INVALID_SECURITY); 3096 case_WLAN(MESH_PATH_ERROR); 3097 case_WLAN(MESH_PATH_NOFORWARD); 3098 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3099 case_WLAN(MAC_EXISTS_IN_MBSS); 3100 case_WLAN(MESH_CHAN_REGULATORY); 3101 case_WLAN(MESH_CHAN); 3102 default: return "<unknown>"; 3103 } 3104 } 3105 3106 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3107 struct ieee80211_mgmt *mgmt, size_t len) 3108 { 3109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3110 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3111 3112 sdata_assert_lock(sdata); 3113 3114 if (len < 24 + 2) 3115 return; 3116 3117 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3118 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3119 return; 3120 } 3121 3122 if (ifmgd->associated && 3123 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3124 const u8 *bssid = ifmgd->associated->bssid; 3125 3126 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3127 bssid, reason_code, 3128 ieee80211_get_reason_code_string(reason_code)); 3129 3130 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3131 3132 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3133 reason_code); 3134 return; 3135 } 3136 3137 if (ifmgd->assoc_data && 3138 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3139 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3140 3141 sdata_info(sdata, 3142 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3143 bssid, reason_code, 3144 ieee80211_get_reason_code_string(reason_code)); 3145 3146 ieee80211_destroy_assoc_data(sdata, false, true); 3147 3148 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3149 return; 3150 } 3151 } 3152 3153 3154 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3155 struct ieee80211_mgmt *mgmt, size_t len) 3156 { 3157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3158 u16 reason_code; 3159 3160 sdata_assert_lock(sdata); 3161 3162 if (len < 24 + 2) 3163 return; 3164 3165 if (!ifmgd->associated || 3166 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3167 return; 3168 3169 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 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 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3177 mgmt->sa, reason_code, 3178 ieee80211_get_reason_code_string(reason_code)); 3179 3180 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3181 3182 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3183 } 3184 3185 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3186 u8 *supp_rates, unsigned int supp_rates_len, 3187 u32 *rates, u32 *basic_rates, 3188 bool *have_higher_than_11mbit, 3189 int *min_rate, int *min_rate_index, 3190 int shift) 3191 { 3192 int i, j; 3193 3194 for (i = 0; i < supp_rates_len; i++) { 3195 int rate = supp_rates[i] & 0x7f; 3196 bool is_basic = !!(supp_rates[i] & 0x80); 3197 3198 if ((rate * 5 * (1 << shift)) > 110) 3199 *have_higher_than_11mbit = true; 3200 3201 /* 3202 * Skip HT, VHT and HE BSS membership selectors since they're 3203 * not rates. 3204 * 3205 * Note: Even though the membership selector and the basic 3206 * rate flag share the same bit, they are not exactly 3207 * the same. 3208 */ 3209 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3210 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3211 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY)) 3212 continue; 3213 3214 for (j = 0; j < sband->n_bitrates; j++) { 3215 struct ieee80211_rate *br; 3216 int brate; 3217 3218 br = &sband->bitrates[j]; 3219 3220 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3221 if (brate == rate) { 3222 *rates |= BIT(j); 3223 if (is_basic) 3224 *basic_rates |= BIT(j); 3225 if ((rate * 5) < *min_rate) { 3226 *min_rate = rate * 5; 3227 *min_rate_index = j; 3228 } 3229 break; 3230 } 3231 } 3232 } 3233 } 3234 3235 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3236 const struct ieee802_11_elems *elems) 3237 { 3238 if (elems->ext_capab_len < 10) 3239 return false; 3240 3241 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3242 return false; 3243 3244 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3245 IEEE80211_HE_MAC_CAP0_TWT_RES; 3246 } 3247 3248 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3249 struct sta_info *sta, 3250 struct ieee802_11_elems *elems) 3251 { 3252 bool twt = ieee80211_twt_req_supported(sta, elems); 3253 3254 if (sdata->vif.bss_conf.twt_requester != twt) { 3255 sdata->vif.bss_conf.twt_requester = twt; 3256 return BSS_CHANGED_TWT; 3257 } 3258 return 0; 3259 } 3260 3261 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3262 struct cfg80211_bss *cbss, 3263 struct ieee80211_mgmt *mgmt, size_t len, 3264 struct ieee802_11_elems *elems) 3265 { 3266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3267 struct ieee80211_local *local = sdata->local; 3268 struct ieee80211_supported_band *sband; 3269 struct sta_info *sta; 3270 u16 capab_info, aid; 3271 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3272 const struct cfg80211_bss_ies *bss_ies = NULL; 3273 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3274 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3275 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3276 u32 changed = 0; 3277 u8 *pos; 3278 int err; 3279 bool ret; 3280 3281 /* AssocResp and ReassocResp have identical structure */ 3282 3283 pos = mgmt->u.assoc_resp.variable; 3284 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3285 if (is_s1g) { 3286 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3287 aid = 0; /* TODO */ 3288 } 3289 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3290 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems, 3291 mgmt->bssid, assoc_data->bss->bssid); 3292 3293 if (elems->aid_resp) 3294 aid = le16_to_cpu(elems->aid_resp->aid); 3295 3296 /* 3297 * The 5 MSB of the AID field are reserved 3298 * (802.11-2016 9.4.1.8 AID field) 3299 */ 3300 aid &= 0x7ff; 3301 3302 ifmgd->broken_ap = false; 3303 3304 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3305 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3306 aid); 3307 aid = 0; 3308 ifmgd->broken_ap = true; 3309 } 3310 3311 if (!is_s1g && !elems->supp_rates) { 3312 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3313 return false; 3314 } 3315 3316 sdata->vif.bss_conf.aid = aid; 3317 ifmgd->tdls_chan_switch_prohibited = 3318 elems->ext_capab && elems->ext_capab_len >= 5 && 3319 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3320 3321 /* 3322 * Some APs are erroneously not including some information in their 3323 * (re)association response frames. Try to recover by using the data 3324 * from the beacon or probe response. This seems to afflict mobile 3325 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3326 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3327 */ 3328 if (!is_6ghz && 3329 ((assoc_data->wmm && !elems->wmm_param) || 3330 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3331 (!elems->ht_cap_elem || !elems->ht_operation)) || 3332 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3333 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3334 const struct cfg80211_bss_ies *ies; 3335 struct ieee802_11_elems bss_elems; 3336 3337 rcu_read_lock(); 3338 ies = rcu_dereference(cbss->ies); 3339 if (ies) 3340 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3341 GFP_ATOMIC); 3342 rcu_read_unlock(); 3343 if (!bss_ies) 3344 return false; 3345 3346 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3347 false, &bss_elems, 3348 mgmt->bssid, 3349 assoc_data->bss->bssid); 3350 if (assoc_data->wmm && 3351 !elems->wmm_param && bss_elems.wmm_param) { 3352 elems->wmm_param = bss_elems.wmm_param; 3353 sdata_info(sdata, 3354 "AP bug: WMM param missing from AssocResp\n"); 3355 } 3356 3357 /* 3358 * Also check if we requested HT/VHT, otherwise the AP doesn't 3359 * have to include the IEs in the (re)association response. 3360 */ 3361 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3362 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3363 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3364 sdata_info(sdata, 3365 "AP bug: HT capability missing from AssocResp\n"); 3366 } 3367 if (!elems->ht_operation && bss_elems.ht_operation && 3368 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3369 elems->ht_operation = bss_elems.ht_operation; 3370 sdata_info(sdata, 3371 "AP bug: HT operation missing from AssocResp\n"); 3372 } 3373 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3374 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3375 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3376 sdata_info(sdata, 3377 "AP bug: VHT capa missing from AssocResp\n"); 3378 } 3379 if (!elems->vht_operation && bss_elems.vht_operation && 3380 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3381 elems->vht_operation = bss_elems.vht_operation; 3382 sdata_info(sdata, 3383 "AP bug: VHT operation missing from AssocResp\n"); 3384 } 3385 } 3386 3387 /* 3388 * We previously checked these in the beacon/probe response, so 3389 * they should be present here. This is just a safety net. 3390 */ 3391 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3392 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3393 sdata_info(sdata, 3394 "HT AP is missing WMM params or HT capability/operation\n"); 3395 ret = false; 3396 goto out; 3397 } 3398 3399 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3400 (!elems->vht_cap_elem || !elems->vht_operation)) { 3401 sdata_info(sdata, 3402 "VHT AP is missing VHT capability/operation\n"); 3403 ret = false; 3404 goto out; 3405 } 3406 3407 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3408 !elems->he_6ghz_capa) { 3409 sdata_info(sdata, 3410 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3411 ret = false; 3412 goto out; 3413 } 3414 3415 mutex_lock(&sdata->local->sta_mtx); 3416 /* 3417 * station info was already allocated and inserted before 3418 * the association and should be available to us 3419 */ 3420 sta = sta_info_get(sdata, cbss->bssid); 3421 if (WARN_ON(!sta)) { 3422 mutex_unlock(&sdata->local->sta_mtx); 3423 ret = false; 3424 goto out; 3425 } 3426 3427 sband = ieee80211_get_sband(sdata); 3428 if (!sband) { 3429 mutex_unlock(&sdata->local->sta_mtx); 3430 ret = false; 3431 goto out; 3432 } 3433 3434 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3435 (!elems->he_cap || !elems->he_operation)) { 3436 mutex_unlock(&sdata->local->sta_mtx); 3437 sdata_info(sdata, 3438 "HE AP is missing HE capability/operation\n"); 3439 ret = false; 3440 goto out; 3441 } 3442 3443 /* Set up internal HT/VHT capabilities */ 3444 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3445 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3446 elems->ht_cap_elem, sta); 3447 3448 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3449 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3450 elems->vht_cap_elem, sta); 3451 3452 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3453 elems->he_cap) { 3454 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3455 elems->he_cap, 3456 elems->he_cap_len, 3457 elems->he_6ghz_capa, 3458 sta); 3459 3460 bss_conf->he_support = sta->sta.he_cap.has_he; 3461 if (elems->rsnx && elems->rsnx_len && 3462 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3463 wiphy_ext_feature_isset(local->hw.wiphy, 3464 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3465 bss_conf->twt_protected = true; 3466 else 3467 bss_conf->twt_protected = false; 3468 3469 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3470 } else { 3471 bss_conf->he_support = false; 3472 bss_conf->twt_requester = false; 3473 bss_conf->twt_protected = false; 3474 } 3475 3476 if (bss_conf->he_support) { 3477 bss_conf->he_bss_color.color = 3478 le32_get_bits(elems->he_operation->he_oper_params, 3479 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3480 bss_conf->he_bss_color.partial = 3481 le32_get_bits(elems->he_operation->he_oper_params, 3482 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3483 bss_conf->he_bss_color.enabled = 3484 !le32_get_bits(elems->he_operation->he_oper_params, 3485 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3486 3487 if (bss_conf->he_bss_color.enabled) 3488 changed |= BSS_CHANGED_HE_BSS_COLOR; 3489 3490 bss_conf->htc_trig_based_pkt_ext = 3491 le32_get_bits(elems->he_operation->he_oper_params, 3492 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3493 bss_conf->frame_time_rts_th = 3494 le32_get_bits(elems->he_operation->he_oper_params, 3495 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3496 3497 bss_conf->multi_sta_back_32bit = 3498 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3499 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3500 3501 bss_conf->ack_enabled = 3502 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3503 IEEE80211_HE_MAC_CAP2_ACK_EN; 3504 3505 bss_conf->uora_exists = !!elems->uora_element; 3506 if (elems->uora_element) 3507 bss_conf->uora_ocw_range = elems->uora_element[0]; 3508 3509 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3510 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3511 /* TODO: OPEN: what happens if BSS color disable is set? */ 3512 } 3513 3514 if (cbss->transmitted_bss) { 3515 bss_conf->nontransmitted = true; 3516 ether_addr_copy(bss_conf->transmitter_bssid, 3517 cbss->transmitted_bss->bssid); 3518 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3519 bss_conf->bssid_index = cbss->bssid_index; 3520 } 3521 3522 /* 3523 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3524 * in their association response, so ignore that data for our own 3525 * configuration. If it changed since the last beacon, we'll get the 3526 * next beacon and update then. 3527 */ 3528 3529 /* 3530 * If an operating mode notification IE is present, override the 3531 * NSS calculation (that would be done in rate_control_rate_init()) 3532 * and use the # of streams from that element. 3533 */ 3534 if (elems->opmode_notif && 3535 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3536 u8 nss; 3537 3538 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3539 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3540 nss += 1; 3541 sta->sta.rx_nss = nss; 3542 } 3543 3544 rate_control_rate_init(sta); 3545 3546 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3547 set_sta_flag(sta, WLAN_STA_MFP); 3548 sta->sta.mfp = true; 3549 } else { 3550 sta->sta.mfp = false; 3551 } 3552 3553 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3554 local->hw.queues >= IEEE80211_NUM_ACS; 3555 3556 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3557 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3558 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3559 if (err) { 3560 sdata_info(sdata, 3561 "failed to move station %pM to desired state\n", 3562 sta->sta.addr); 3563 WARN_ON(__sta_info_destroy(sta)); 3564 mutex_unlock(&sdata->local->sta_mtx); 3565 ret = false; 3566 goto out; 3567 } 3568 3569 if (sdata->wdev.use_4addr) 3570 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3571 3572 mutex_unlock(&sdata->local->sta_mtx); 3573 3574 /* 3575 * Always handle WMM once after association regardless 3576 * of the first value the AP uses. Setting -1 here has 3577 * that effect because the AP values is an unsigned 3578 * 4-bit value. 3579 */ 3580 ifmgd->wmm_last_param_set = -1; 3581 ifmgd->mu_edca_last_param_set = -1; 3582 3583 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3584 ieee80211_set_wmm_default(sdata, false, false); 3585 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3586 elems->wmm_param_len, 3587 elems->mu_edca_param_set)) { 3588 /* still enable QoS since we might have HT/VHT */ 3589 ieee80211_set_wmm_default(sdata, false, true); 3590 /* set the disable-WMM flag in this case to disable 3591 * tracking WMM parameter changes in the beacon if 3592 * the parameters weren't actually valid. Doing so 3593 * avoids changing parameters very strangely when 3594 * the AP is going back and forth between valid and 3595 * invalid parameters. 3596 */ 3597 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3598 } 3599 changed |= BSS_CHANGED_QOS; 3600 3601 if (elems->max_idle_period_ie) { 3602 bss_conf->max_idle_period = 3603 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3604 bss_conf->protected_keep_alive = 3605 !!(elems->max_idle_period_ie->idle_options & 3606 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3607 changed |= BSS_CHANGED_KEEP_ALIVE; 3608 } else { 3609 bss_conf->max_idle_period = 0; 3610 bss_conf->protected_keep_alive = false; 3611 } 3612 3613 /* set assoc capability (AID was already set earlier), 3614 * ieee80211_set_associated() will tell the driver */ 3615 bss_conf->assoc_capability = capab_info; 3616 ieee80211_set_associated(sdata, cbss, changed); 3617 3618 /* 3619 * If we're using 4-addr mode, let the AP know that we're 3620 * doing so, so that it can create the STA VLAN on its side 3621 */ 3622 if (ifmgd->use_4addr) 3623 ieee80211_send_4addr_nullfunc(local, sdata); 3624 3625 /* 3626 * Start timer to probe the connection to the AP now. 3627 * Also start the timer that will detect beacon loss. 3628 */ 3629 ieee80211_sta_reset_beacon_monitor(sdata); 3630 ieee80211_sta_reset_conn_monitor(sdata); 3631 3632 ret = true; 3633 out: 3634 kfree(bss_ies); 3635 return ret; 3636 } 3637 3638 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3639 struct ieee80211_mgmt *mgmt, 3640 size_t len) 3641 { 3642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3643 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3644 u16 capab_info, status_code, aid; 3645 struct ieee802_11_elems elems; 3646 int ac, uapsd_queues = -1; 3647 u8 *pos; 3648 bool reassoc; 3649 struct cfg80211_bss *cbss; 3650 struct ieee80211_event event = { 3651 .type = MLME_EVENT, 3652 .u.mlme.data = ASSOC_EVENT, 3653 }; 3654 3655 sdata_assert_lock(sdata); 3656 3657 if (!assoc_data) 3658 return; 3659 3660 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3661 return; 3662 3663 cbss = assoc_data->bss; 3664 3665 /* 3666 * AssocResp and ReassocResp have identical structure, so process both 3667 * of them in this function. 3668 */ 3669 3670 if (len < 24 + 6) 3671 return; 3672 3673 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3674 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3675 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3676 pos = mgmt->u.assoc_resp.variable; 3677 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3678 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3679 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3680 aid = 0; /* TODO */ 3681 } 3682 3683 sdata_info(sdata, 3684 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3685 reassoc ? "Rea" : "A", mgmt->sa, 3686 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3687 3688 if (assoc_data->fils_kek_len && 3689 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3690 return; 3691 3692 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3693 mgmt->bssid, assoc_data->bss->bssid); 3694 3695 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3696 elems.timeout_int && 3697 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3698 u32 tu, ms; 3699 tu = le32_to_cpu(elems.timeout_int->value); 3700 ms = tu * 1024 / 1000; 3701 sdata_info(sdata, 3702 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3703 mgmt->sa, tu, ms); 3704 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3705 assoc_data->timeout_started = true; 3706 if (ms > IEEE80211_ASSOC_TIMEOUT) 3707 run_again(sdata, assoc_data->timeout); 3708 return; 3709 } 3710 3711 if (status_code != WLAN_STATUS_SUCCESS) { 3712 sdata_info(sdata, "%pM denied association (code=%d)\n", 3713 mgmt->sa, status_code); 3714 ieee80211_destroy_assoc_data(sdata, false, false); 3715 event.u.mlme.status = MLME_DENIED; 3716 event.u.mlme.reason = status_code; 3717 drv_event_callback(sdata->local, sdata, &event); 3718 } else { 3719 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) { 3720 /* oops -- internal error -- send timeout for now */ 3721 ieee80211_destroy_assoc_data(sdata, false, false); 3722 cfg80211_assoc_timeout(sdata->dev, cbss); 3723 return; 3724 } 3725 event.u.mlme.status = MLME_SUCCESS; 3726 drv_event_callback(sdata->local, sdata, &event); 3727 sdata_info(sdata, "associated\n"); 3728 3729 /* 3730 * destroy assoc_data afterwards, as otherwise an idle 3731 * recalc after assoc_data is NULL but before associated 3732 * is set can cause the interface to go idle 3733 */ 3734 ieee80211_destroy_assoc_data(sdata, true, false); 3735 3736 /* get uapsd queues configuration */ 3737 uapsd_queues = 0; 3738 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3739 if (sdata->tx_conf[ac].uapsd) 3740 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3741 } 3742 3743 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3744 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3745 } 3746 3747 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3748 struct ieee80211_mgmt *mgmt, size_t len, 3749 struct ieee80211_rx_status *rx_status) 3750 { 3751 struct ieee80211_local *local = sdata->local; 3752 struct ieee80211_bss *bss; 3753 struct ieee80211_channel *channel; 3754 3755 sdata_assert_lock(sdata); 3756 3757 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3758 ieee80211_rx_status_to_khz(rx_status)); 3759 if (!channel) 3760 return; 3761 3762 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3763 if (bss) { 3764 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3765 ieee80211_rx_bss_put(local, bss); 3766 } 3767 } 3768 3769 3770 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3771 struct sk_buff *skb) 3772 { 3773 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3774 struct ieee80211_if_managed *ifmgd; 3775 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3776 struct ieee80211_channel *channel; 3777 size_t baselen, len = skb->len; 3778 3779 ifmgd = &sdata->u.mgd; 3780 3781 sdata_assert_lock(sdata); 3782 3783 /* 3784 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3785 * "If a 6 GHz AP receives a Probe Request frame and responds with 3786 * a Probe Response frame [..], the Address 1 field of the Probe 3787 * Response frame shall be set to the broadcast address [..]" 3788 * So, on 6GHz band we should also accept broadcast responses. 3789 */ 3790 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3791 rx_status->freq); 3792 if (!channel) 3793 return; 3794 3795 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3796 (channel->band != NL80211_BAND_6GHZ || 3797 !is_broadcast_ether_addr(mgmt->da))) 3798 return; /* ignore ProbeResp to foreign address */ 3799 3800 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3801 if (baselen > len) 3802 return; 3803 3804 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3805 3806 if (ifmgd->associated && 3807 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3808 ieee80211_reset_ap_probe(sdata); 3809 } 3810 3811 /* 3812 * This is the canonical list of information elements we care about, 3813 * the filter code also gives us all changes to the Microsoft OUI 3814 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3815 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3816 * changes to requested client power. 3817 * 3818 * We implement beacon filtering in software since that means we can 3819 * avoid processing the frame here and in cfg80211, and userspace 3820 * will not be able to tell whether the hardware supports it or not. 3821 * 3822 * XXX: This list needs to be dynamic -- userspace needs to be able to 3823 * add items it requires. It also needs to be able to tell us to 3824 * look out for other vendor IEs. 3825 */ 3826 static const u64 care_about_ies = 3827 (1ULL << WLAN_EID_COUNTRY) | 3828 (1ULL << WLAN_EID_ERP_INFO) | 3829 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3830 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3831 (1ULL << WLAN_EID_HT_CAPABILITY) | 3832 (1ULL << WLAN_EID_HT_OPERATION) | 3833 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3834 3835 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3836 struct ieee80211_if_managed *ifmgd, 3837 struct ieee80211_bss_conf *bss_conf, 3838 struct ieee80211_local *local, 3839 struct ieee80211_rx_status *rx_status) 3840 { 3841 /* Track average RSSI from the Beacon frames of the current AP */ 3842 3843 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3844 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3845 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3846 ifmgd->last_cqm_event_signal = 0; 3847 ifmgd->count_beacon_signal = 1; 3848 ifmgd->last_ave_beacon_signal = 0; 3849 } else { 3850 ifmgd->count_beacon_signal++; 3851 } 3852 3853 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3854 3855 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3856 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3857 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3858 int last_sig = ifmgd->last_ave_beacon_signal; 3859 struct ieee80211_event event = { 3860 .type = RSSI_EVENT, 3861 }; 3862 3863 /* 3864 * if signal crosses either of the boundaries, invoke callback 3865 * with appropriate parameters 3866 */ 3867 if (sig > ifmgd->rssi_max_thold && 3868 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3869 ifmgd->last_ave_beacon_signal = sig; 3870 event.u.rssi.data = RSSI_EVENT_HIGH; 3871 drv_event_callback(local, sdata, &event); 3872 } else if (sig < ifmgd->rssi_min_thold && 3873 (last_sig >= ifmgd->rssi_max_thold || 3874 last_sig == 0)) { 3875 ifmgd->last_ave_beacon_signal = sig; 3876 event.u.rssi.data = RSSI_EVENT_LOW; 3877 drv_event_callback(local, sdata, &event); 3878 } 3879 } 3880 3881 if (bss_conf->cqm_rssi_thold && 3882 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3883 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3884 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3885 int last_event = ifmgd->last_cqm_event_signal; 3886 int thold = bss_conf->cqm_rssi_thold; 3887 int hyst = bss_conf->cqm_rssi_hyst; 3888 3889 if (sig < thold && 3890 (last_event == 0 || sig < last_event - hyst)) { 3891 ifmgd->last_cqm_event_signal = sig; 3892 ieee80211_cqm_rssi_notify( 3893 &sdata->vif, 3894 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3895 sig, GFP_KERNEL); 3896 } else if (sig > thold && 3897 (last_event == 0 || sig > last_event + hyst)) { 3898 ifmgd->last_cqm_event_signal = sig; 3899 ieee80211_cqm_rssi_notify( 3900 &sdata->vif, 3901 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3902 sig, GFP_KERNEL); 3903 } 3904 } 3905 3906 if (bss_conf->cqm_rssi_low && 3907 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3908 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3909 int last_event = ifmgd->last_cqm_event_signal; 3910 int low = bss_conf->cqm_rssi_low; 3911 int high = bss_conf->cqm_rssi_high; 3912 3913 if (sig < low && 3914 (last_event == 0 || last_event >= low)) { 3915 ifmgd->last_cqm_event_signal = sig; 3916 ieee80211_cqm_rssi_notify( 3917 &sdata->vif, 3918 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3919 sig, GFP_KERNEL); 3920 } else if (sig > high && 3921 (last_event == 0 || last_event <= high)) { 3922 ifmgd->last_cqm_event_signal = sig; 3923 ieee80211_cqm_rssi_notify( 3924 &sdata->vif, 3925 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3926 sig, GFP_KERNEL); 3927 } 3928 } 3929 } 3930 3931 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3932 struct cfg80211_bss *bss) 3933 { 3934 if (ether_addr_equal(tx_bssid, bss->bssid)) 3935 return true; 3936 if (!bss->transmitted_bss) 3937 return false; 3938 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3939 } 3940 3941 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3942 struct ieee80211_hdr *hdr, size_t len, 3943 struct ieee80211_rx_status *rx_status) 3944 { 3945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3946 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3947 struct ieee80211_mgmt *mgmt = (void *) hdr; 3948 size_t baselen; 3949 struct ieee802_11_elems elems; 3950 struct ieee80211_local *local = sdata->local; 3951 struct ieee80211_chanctx_conf *chanctx_conf; 3952 struct ieee80211_channel *chan; 3953 struct sta_info *sta; 3954 u32 changed = 0; 3955 bool erp_valid; 3956 u8 erp_value = 0; 3957 u32 ncrc = 0; 3958 u8 *bssid, *variable = mgmt->u.beacon.variable; 3959 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3960 3961 sdata_assert_lock(sdata); 3962 3963 /* Process beacon from the current BSS */ 3964 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 3965 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 3966 struct ieee80211_ext *ext = (void *) mgmt; 3967 3968 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 3969 variable = ext->u.s1g_short_beacon.variable; 3970 else 3971 variable = ext->u.s1g_beacon.variable; 3972 } 3973 3974 baselen = (u8 *) variable - (u8 *) mgmt; 3975 if (baselen > len) 3976 return; 3977 3978 rcu_read_lock(); 3979 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3980 if (!chanctx_conf) { 3981 rcu_read_unlock(); 3982 return; 3983 } 3984 3985 if (ieee80211_rx_status_to_khz(rx_status) != 3986 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 3987 rcu_read_unlock(); 3988 return; 3989 } 3990 chan = chanctx_conf->def.chan; 3991 rcu_read_unlock(); 3992 3993 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3994 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 3995 ieee802_11_parse_elems(variable, 3996 len - baselen, false, &elems, 3997 bssid, 3998 ifmgd->assoc_data->bss->bssid); 3999 4000 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4001 4002 if (elems.dtim_period) 4003 ifmgd->dtim_period = elems.dtim_period; 4004 ifmgd->have_beacon = true; 4005 ifmgd->assoc_data->need_beacon = false; 4006 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4007 sdata->vif.bss_conf.sync_tsf = 4008 le64_to_cpu(mgmt->u.beacon.timestamp); 4009 sdata->vif.bss_conf.sync_device_ts = 4010 rx_status->device_timestamp; 4011 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4012 } 4013 4014 if (elems.mbssid_config_ie) 4015 bss_conf->profile_periodicity = 4016 elems.mbssid_config_ie->profile_periodicity; 4017 4018 if (elems.ext_capab_len >= 11 && 4019 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4020 bss_conf->ema_ap = true; 4021 4022 /* continue assoc process */ 4023 ifmgd->assoc_data->timeout = jiffies; 4024 ifmgd->assoc_data->timeout_started = true; 4025 run_again(sdata, ifmgd->assoc_data->timeout); 4026 return; 4027 } 4028 4029 if (!ifmgd->associated || 4030 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4031 return; 4032 bssid = ifmgd->associated->bssid; 4033 4034 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4035 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4036 local, rx_status); 4037 4038 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4039 mlme_dbg_ratelimited(sdata, 4040 "cancelling AP probe due to a received beacon\n"); 4041 ieee80211_reset_ap_probe(sdata); 4042 } 4043 4044 /* 4045 * Push the beacon loss detection into the future since 4046 * we are processing a beacon from the AP just now. 4047 */ 4048 ieee80211_sta_reset_beacon_monitor(sdata); 4049 4050 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4051 * element (which carries the beacon interval). Don't forget to add a 4052 * bit to care_about_ies[] above if mac80211 is interested in a 4053 * changing S1G element. 4054 */ 4055 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4056 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4057 ncrc = ieee802_11_parse_elems_crc(variable, 4058 len - baselen, false, &elems, 4059 care_about_ies, ncrc, 4060 mgmt->bssid, bssid); 4061 4062 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4063 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 4064 if (local->hw.conf.dynamic_ps_timeout > 0) { 4065 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4066 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4067 ieee80211_hw_config(local, 4068 IEEE80211_CONF_CHANGE_PS); 4069 } 4070 ieee80211_send_nullfunc(local, sdata, false); 4071 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4072 local->pspolling = true; 4073 4074 /* 4075 * Here is assumed that the driver will be 4076 * able to send ps-poll frame and receive a 4077 * response even though power save mode is 4078 * enabled, but some drivers might require 4079 * to disable power save here. This needs 4080 * to be investigated. 4081 */ 4082 ieee80211_send_pspoll(local, sdata); 4083 } 4084 } 4085 4086 if (sdata->vif.p2p || 4087 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4088 struct ieee80211_p2p_noa_attr noa = {}; 4089 int ret; 4090 4091 ret = cfg80211_get_p2p_attr(variable, 4092 len - baselen, 4093 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4094 (u8 *) &noa, sizeof(noa)); 4095 if (ret >= 2) { 4096 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4097 /* valid noa_attr and index changed */ 4098 sdata->u.mgd.p2p_noa_index = noa.index; 4099 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4100 changed |= BSS_CHANGED_P2P_PS; 4101 /* 4102 * make sure we update all information, the CRC 4103 * mechanism doesn't look at P2P attributes. 4104 */ 4105 ifmgd->beacon_crc_valid = false; 4106 } 4107 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4108 /* noa_attr not found and we had valid noa_attr before */ 4109 sdata->u.mgd.p2p_noa_index = -1; 4110 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4111 changed |= BSS_CHANGED_P2P_PS; 4112 ifmgd->beacon_crc_valid = false; 4113 } 4114 } 4115 4116 if (ifmgd->csa_waiting_bcn) 4117 ieee80211_chswitch_post_beacon(sdata); 4118 4119 /* 4120 * Update beacon timing and dtim count on every beacon appearance. This 4121 * will allow the driver to use the most updated values. Do it before 4122 * comparing this one with last received beacon. 4123 * IMPORTANT: These parameters would possibly be out of sync by the time 4124 * the driver will use them. The synchronized view is currently 4125 * guaranteed only in certain callbacks. 4126 */ 4127 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4128 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4129 sdata->vif.bss_conf.sync_tsf = 4130 le64_to_cpu(mgmt->u.beacon.timestamp); 4131 sdata->vif.bss_conf.sync_device_ts = 4132 rx_status->device_timestamp; 4133 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4134 } 4135 4136 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4137 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4138 return; 4139 ifmgd->beacon_crc = ncrc; 4140 ifmgd->beacon_crc_valid = true; 4141 4142 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4143 4144 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4145 rx_status->device_timestamp, 4146 &elems, true); 4147 4148 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4149 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4150 elems.wmm_param_len, 4151 elems.mu_edca_param_set)) 4152 changed |= BSS_CHANGED_QOS; 4153 4154 /* 4155 * If we haven't had a beacon before, tell the driver about the 4156 * DTIM period (and beacon timing if desired) now. 4157 */ 4158 if (!ifmgd->have_beacon) { 4159 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4160 bss_conf->dtim_period = elems.dtim_period ?: 1; 4161 4162 changed |= BSS_CHANGED_BEACON_INFO; 4163 ifmgd->have_beacon = true; 4164 4165 mutex_lock(&local->iflist_mtx); 4166 ieee80211_recalc_ps(local); 4167 mutex_unlock(&local->iflist_mtx); 4168 4169 ieee80211_recalc_ps_vif(sdata); 4170 } 4171 4172 if (elems.erp_info) { 4173 erp_valid = true; 4174 erp_value = elems.erp_info[0]; 4175 } else { 4176 erp_valid = false; 4177 } 4178 4179 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4180 changed |= ieee80211_handle_bss_capability(sdata, 4181 le16_to_cpu(mgmt->u.beacon.capab_info), 4182 erp_valid, erp_value); 4183 4184 mutex_lock(&local->sta_mtx); 4185 sta = sta_info_get(sdata, bssid); 4186 4187 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4188 4189 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4190 elems.vht_cap_elem, elems.ht_operation, 4191 elems.vht_operation, elems.he_operation, 4192 elems.s1g_oper, bssid, &changed)) { 4193 mutex_unlock(&local->sta_mtx); 4194 sdata_info(sdata, 4195 "failed to follow AP %pM bandwidth change, disconnect\n", 4196 bssid); 4197 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4198 WLAN_REASON_DEAUTH_LEAVING, 4199 true, deauth_buf); 4200 ieee80211_report_disconnect(sdata, deauth_buf, 4201 sizeof(deauth_buf), true, 4202 WLAN_REASON_DEAUTH_LEAVING); 4203 return; 4204 } 4205 4206 if (sta && elems.opmode_notif) 4207 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4208 rx_status->band); 4209 mutex_unlock(&local->sta_mtx); 4210 4211 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4212 elems.country_elem, 4213 elems.country_elem_len, 4214 elems.pwr_constr_elem, 4215 elems.cisco_dtpc_elem); 4216 4217 ieee80211_bss_info_change_notify(sdata, changed); 4218 } 4219 4220 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4221 struct sk_buff *skb) 4222 { 4223 struct ieee80211_rx_status *rx_status; 4224 struct ieee80211_hdr *hdr; 4225 u16 fc; 4226 4227 rx_status = (struct ieee80211_rx_status *) skb->cb; 4228 hdr = (struct ieee80211_hdr *) skb->data; 4229 fc = le16_to_cpu(hdr->frame_control); 4230 4231 sdata_lock(sdata); 4232 switch (fc & IEEE80211_FCTL_STYPE) { 4233 case IEEE80211_STYPE_S1G_BEACON: 4234 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4235 break; 4236 } 4237 sdata_unlock(sdata); 4238 } 4239 4240 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4241 struct sk_buff *skb) 4242 { 4243 struct ieee80211_rx_status *rx_status; 4244 struct ieee80211_mgmt *mgmt; 4245 u16 fc; 4246 struct ieee802_11_elems elems; 4247 int ies_len; 4248 4249 rx_status = (struct ieee80211_rx_status *) skb->cb; 4250 mgmt = (struct ieee80211_mgmt *) skb->data; 4251 fc = le16_to_cpu(mgmt->frame_control); 4252 4253 sdata_lock(sdata); 4254 4255 switch (fc & IEEE80211_FCTL_STYPE) { 4256 case IEEE80211_STYPE_BEACON: 4257 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4258 skb->len, rx_status); 4259 break; 4260 case IEEE80211_STYPE_PROBE_RESP: 4261 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4262 break; 4263 case IEEE80211_STYPE_AUTH: 4264 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4265 break; 4266 case IEEE80211_STYPE_DEAUTH: 4267 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4268 break; 4269 case IEEE80211_STYPE_DISASSOC: 4270 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4271 break; 4272 case IEEE80211_STYPE_ASSOC_RESP: 4273 case IEEE80211_STYPE_REASSOC_RESP: 4274 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4275 break; 4276 case IEEE80211_STYPE_ACTION: 4277 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4278 ies_len = skb->len - 4279 offsetof(struct ieee80211_mgmt, 4280 u.action.u.chan_switch.variable); 4281 4282 if (ies_len < 0) 4283 break; 4284 4285 /* CSA IE cannot be overridden, no need for BSSID */ 4286 ieee802_11_parse_elems( 4287 mgmt->u.action.u.chan_switch.variable, 4288 ies_len, true, &elems, mgmt->bssid, NULL); 4289 4290 if (elems.parse_error) 4291 break; 4292 4293 ieee80211_sta_process_chanswitch(sdata, 4294 rx_status->mactime, 4295 rx_status->device_timestamp, 4296 &elems, false); 4297 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4298 ies_len = skb->len - 4299 offsetof(struct ieee80211_mgmt, 4300 u.action.u.ext_chan_switch.variable); 4301 4302 if (ies_len < 0) 4303 break; 4304 4305 /* 4306 * extended CSA IE can't be overridden, no need for 4307 * BSSID 4308 */ 4309 ieee802_11_parse_elems( 4310 mgmt->u.action.u.ext_chan_switch.variable, 4311 ies_len, true, &elems, mgmt->bssid, NULL); 4312 4313 if (elems.parse_error) 4314 break; 4315 4316 /* for the handling code pretend this was also an IE */ 4317 elems.ext_chansw_ie = 4318 &mgmt->u.action.u.ext_chan_switch.data; 4319 4320 ieee80211_sta_process_chanswitch(sdata, 4321 rx_status->mactime, 4322 rx_status->device_timestamp, 4323 &elems, false); 4324 } 4325 break; 4326 } 4327 sdata_unlock(sdata); 4328 } 4329 4330 static void ieee80211_sta_timer(struct timer_list *t) 4331 { 4332 struct ieee80211_sub_if_data *sdata = 4333 from_timer(sdata, t, u.mgd.timer); 4334 4335 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4336 } 4337 4338 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4339 u8 *bssid, u8 reason, bool tx) 4340 { 4341 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4342 4343 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4344 tx, frame_buf); 4345 4346 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4347 reason); 4348 } 4349 4350 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4351 { 4352 struct ieee80211_local *local = sdata->local; 4353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4354 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4355 u32 tx_flags = 0; 4356 u16 trans = 1; 4357 u16 status = 0; 4358 u16 prepare_tx_duration = 0; 4359 4360 sdata_assert_lock(sdata); 4361 4362 if (WARN_ON_ONCE(!auth_data)) 4363 return -EINVAL; 4364 4365 auth_data->tries++; 4366 4367 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4368 sdata_info(sdata, "authentication with %pM timed out\n", 4369 auth_data->bss->bssid); 4370 4371 /* 4372 * Most likely AP is not in the range so remove the 4373 * bss struct for that AP. 4374 */ 4375 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4376 4377 return -ETIMEDOUT; 4378 } 4379 4380 if (auth_data->algorithm == WLAN_AUTH_SAE) 4381 prepare_tx_duration = 4382 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4383 4384 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4385 4386 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4387 auth_data->bss->bssid, auth_data->tries, 4388 IEEE80211_AUTH_MAX_TRIES); 4389 4390 auth_data->expected_transaction = 2; 4391 4392 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4393 trans = auth_data->sae_trans; 4394 status = auth_data->sae_status; 4395 auth_data->expected_transaction = trans; 4396 } 4397 4398 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4399 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4400 IEEE80211_TX_INTFL_MLME_CONN_TX; 4401 4402 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4403 auth_data->data, auth_data->data_len, 4404 auth_data->bss->bssid, 4405 auth_data->bss->bssid, NULL, 0, 0, 4406 tx_flags); 4407 4408 if (tx_flags == 0) { 4409 if (auth_data->algorithm == WLAN_AUTH_SAE) 4410 auth_data->timeout = jiffies + 4411 IEEE80211_AUTH_TIMEOUT_SAE; 4412 else 4413 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4414 } else { 4415 auth_data->timeout = 4416 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4417 } 4418 4419 auth_data->timeout_started = true; 4420 run_again(sdata, auth_data->timeout); 4421 4422 return 0; 4423 } 4424 4425 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4426 { 4427 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4428 struct ieee80211_local *local = sdata->local; 4429 4430 sdata_assert_lock(sdata); 4431 4432 assoc_data->tries++; 4433 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4434 sdata_info(sdata, "association with %pM timed out\n", 4435 assoc_data->bss->bssid); 4436 4437 /* 4438 * Most likely AP is not in the range so remove the 4439 * bss struct for that AP. 4440 */ 4441 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4442 4443 return -ETIMEDOUT; 4444 } 4445 4446 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4447 assoc_data->bss->bssid, assoc_data->tries, 4448 IEEE80211_ASSOC_MAX_TRIES); 4449 ieee80211_send_assoc(sdata); 4450 4451 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4452 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4453 assoc_data->timeout_started = true; 4454 run_again(sdata, assoc_data->timeout); 4455 } else { 4456 assoc_data->timeout = 4457 round_jiffies_up(jiffies + 4458 IEEE80211_ASSOC_TIMEOUT_LONG); 4459 assoc_data->timeout_started = true; 4460 run_again(sdata, assoc_data->timeout); 4461 } 4462 4463 return 0; 4464 } 4465 4466 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4467 __le16 fc, bool acked) 4468 { 4469 struct ieee80211_local *local = sdata->local; 4470 4471 sdata->u.mgd.status_fc = fc; 4472 sdata->u.mgd.status_acked = acked; 4473 sdata->u.mgd.status_received = true; 4474 4475 ieee80211_queue_work(&local->hw, &sdata->work); 4476 } 4477 4478 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4479 { 4480 struct ieee80211_local *local = sdata->local; 4481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4482 4483 sdata_lock(sdata); 4484 4485 if (ifmgd->status_received) { 4486 __le16 fc = ifmgd->status_fc; 4487 bool status_acked = ifmgd->status_acked; 4488 4489 ifmgd->status_received = false; 4490 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4491 if (status_acked) { 4492 if (ifmgd->auth_data->algorithm == 4493 WLAN_AUTH_SAE) 4494 ifmgd->auth_data->timeout = 4495 jiffies + 4496 IEEE80211_AUTH_TIMEOUT_SAE; 4497 else 4498 ifmgd->auth_data->timeout = 4499 jiffies + 4500 IEEE80211_AUTH_TIMEOUT_SHORT; 4501 run_again(sdata, ifmgd->auth_data->timeout); 4502 } else { 4503 ifmgd->auth_data->timeout = jiffies - 1; 4504 } 4505 ifmgd->auth_data->timeout_started = true; 4506 } else if (ifmgd->assoc_data && 4507 (ieee80211_is_assoc_req(fc) || 4508 ieee80211_is_reassoc_req(fc))) { 4509 if (status_acked) { 4510 ifmgd->assoc_data->timeout = 4511 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4512 run_again(sdata, ifmgd->assoc_data->timeout); 4513 } else { 4514 ifmgd->assoc_data->timeout = jiffies - 1; 4515 } 4516 ifmgd->assoc_data->timeout_started = true; 4517 } 4518 } 4519 4520 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4521 time_after(jiffies, ifmgd->auth_data->timeout)) { 4522 if (ifmgd->auth_data->done) { 4523 /* 4524 * ok ... we waited for assoc but userspace didn't, 4525 * so let's just kill the auth data 4526 */ 4527 ieee80211_destroy_auth_data(sdata, false); 4528 } else if (ieee80211_auth(sdata)) { 4529 u8 bssid[ETH_ALEN]; 4530 struct ieee80211_event event = { 4531 .type = MLME_EVENT, 4532 .u.mlme.data = AUTH_EVENT, 4533 .u.mlme.status = MLME_TIMEOUT, 4534 }; 4535 4536 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4537 4538 ieee80211_destroy_auth_data(sdata, false); 4539 4540 cfg80211_auth_timeout(sdata->dev, bssid); 4541 drv_event_callback(sdata->local, sdata, &event); 4542 } 4543 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4544 run_again(sdata, ifmgd->auth_data->timeout); 4545 4546 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4547 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4548 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4549 ieee80211_do_assoc(sdata)) { 4550 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4551 struct ieee80211_event event = { 4552 .type = MLME_EVENT, 4553 .u.mlme.data = ASSOC_EVENT, 4554 .u.mlme.status = MLME_TIMEOUT, 4555 }; 4556 4557 ieee80211_destroy_assoc_data(sdata, false, false); 4558 cfg80211_assoc_timeout(sdata->dev, bss); 4559 drv_event_callback(sdata->local, sdata, &event); 4560 } 4561 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4562 run_again(sdata, ifmgd->assoc_data->timeout); 4563 4564 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4565 ifmgd->associated) { 4566 u8 bssid[ETH_ALEN]; 4567 int max_tries; 4568 4569 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4570 4571 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4572 max_tries = max_nullfunc_tries; 4573 else 4574 max_tries = max_probe_tries; 4575 4576 /* ACK received for nullfunc probing frame */ 4577 if (!ifmgd->probe_send_count) 4578 ieee80211_reset_ap_probe(sdata); 4579 else if (ifmgd->nullfunc_failed) { 4580 if (ifmgd->probe_send_count < max_tries) { 4581 mlme_dbg(sdata, 4582 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4583 bssid, ifmgd->probe_send_count, 4584 max_tries); 4585 ieee80211_mgd_probe_ap_send(sdata); 4586 } else { 4587 mlme_dbg(sdata, 4588 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4589 bssid); 4590 ieee80211_sta_connection_lost(sdata, bssid, 4591 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4592 false); 4593 } 4594 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4595 run_again(sdata, ifmgd->probe_timeout); 4596 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4597 mlme_dbg(sdata, 4598 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4599 bssid, probe_wait_ms); 4600 ieee80211_sta_connection_lost(sdata, bssid, 4601 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4602 } else if (ifmgd->probe_send_count < max_tries) { 4603 mlme_dbg(sdata, 4604 "No probe response from AP %pM after %dms, try %d/%i\n", 4605 bssid, probe_wait_ms, 4606 ifmgd->probe_send_count, max_tries); 4607 ieee80211_mgd_probe_ap_send(sdata); 4608 } else { 4609 /* 4610 * We actually lost the connection ... or did we? 4611 * Let's make sure! 4612 */ 4613 mlme_dbg(sdata, 4614 "No probe response from AP %pM after %dms, disconnecting.\n", 4615 bssid, probe_wait_ms); 4616 4617 ieee80211_sta_connection_lost(sdata, bssid, 4618 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4619 } 4620 } 4621 4622 sdata_unlock(sdata); 4623 } 4624 4625 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4626 { 4627 struct ieee80211_sub_if_data *sdata = 4628 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4630 4631 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4632 return; 4633 4634 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4635 return; 4636 4637 sdata->u.mgd.connection_loss = false; 4638 ieee80211_queue_work(&sdata->local->hw, 4639 &sdata->u.mgd.beacon_connection_loss_work); 4640 } 4641 4642 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4643 { 4644 struct ieee80211_sub_if_data *sdata = 4645 from_timer(sdata, t, u.mgd.conn_mon_timer); 4646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4647 struct ieee80211_local *local = sdata->local; 4648 struct sta_info *sta; 4649 unsigned long timeout; 4650 4651 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4652 return; 4653 4654 sta = sta_info_get(sdata, ifmgd->bssid); 4655 if (!sta) 4656 return; 4657 4658 timeout = sta->status_stats.last_ack; 4659 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4660 timeout = sta->rx_stats.last_rx; 4661 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4662 4663 if (time_is_before_jiffies(timeout)) { 4664 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4665 return; 4666 } 4667 4668 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4669 } 4670 4671 static void ieee80211_sta_monitor_work(struct work_struct *work) 4672 { 4673 struct ieee80211_sub_if_data *sdata = 4674 container_of(work, struct ieee80211_sub_if_data, 4675 u.mgd.monitor_work); 4676 4677 ieee80211_mgd_probe_ap(sdata, false); 4678 } 4679 4680 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4681 { 4682 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4683 __ieee80211_stop_poll(sdata); 4684 4685 /* let's probe the connection once */ 4686 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4687 ieee80211_queue_work(&sdata->local->hw, 4688 &sdata->u.mgd.monitor_work); 4689 } 4690 } 4691 4692 #ifdef CONFIG_PM 4693 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4694 { 4695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4696 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4697 4698 sdata_lock(sdata); 4699 4700 if (ifmgd->auth_data || ifmgd->assoc_data) { 4701 const u8 *bssid = ifmgd->auth_data ? 4702 ifmgd->auth_data->bss->bssid : 4703 ifmgd->assoc_data->bss->bssid; 4704 4705 /* 4706 * If we are trying to authenticate / associate while suspending, 4707 * cfg80211 won't know and won't actually abort those attempts, 4708 * thus we need to do that ourselves. 4709 */ 4710 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4711 IEEE80211_STYPE_DEAUTH, 4712 WLAN_REASON_DEAUTH_LEAVING, 4713 false, frame_buf); 4714 if (ifmgd->assoc_data) 4715 ieee80211_destroy_assoc_data(sdata, false, true); 4716 if (ifmgd->auth_data) 4717 ieee80211_destroy_auth_data(sdata, false); 4718 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4719 IEEE80211_DEAUTH_FRAME_LEN); 4720 } 4721 4722 /* This is a bit of a hack - we should find a better and more generic 4723 * solution to this. Normally when suspending, cfg80211 will in fact 4724 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4725 * auth (not so important) or assoc (this is the problem) process. 4726 * 4727 * As a consequence, it can happen that we are in the process of both 4728 * associating and suspending, and receive an association response 4729 * after cfg80211 has checked if it needs to disconnect, but before 4730 * we actually set the flag to drop incoming frames. This will then 4731 * cause the workqueue flush to process the association response in 4732 * the suspend, resulting in a successful association just before it 4733 * tries to remove the interface from the driver, which now though 4734 * has a channel context assigned ... this results in issues. 4735 * 4736 * To work around this (for now) simply deauth here again if we're 4737 * now connected. 4738 */ 4739 if (ifmgd->associated && !sdata->local->wowlan) { 4740 u8 bssid[ETH_ALEN]; 4741 struct cfg80211_deauth_request req = { 4742 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4743 .bssid = bssid, 4744 }; 4745 4746 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4747 ieee80211_mgd_deauth(sdata, &req); 4748 } 4749 4750 sdata_unlock(sdata); 4751 } 4752 4753 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4754 { 4755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4756 4757 sdata_lock(sdata); 4758 if (!ifmgd->associated) { 4759 sdata_unlock(sdata); 4760 return; 4761 } 4762 4763 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4764 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4765 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4766 ieee80211_sta_connection_lost(sdata, 4767 ifmgd->associated->bssid, 4768 WLAN_REASON_UNSPECIFIED, 4769 true); 4770 sdata_unlock(sdata); 4771 return; 4772 } 4773 sdata_unlock(sdata); 4774 } 4775 #endif 4776 4777 /* interface setup */ 4778 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4779 { 4780 struct ieee80211_if_managed *ifmgd; 4781 4782 ifmgd = &sdata->u.mgd; 4783 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4784 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4785 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4786 ieee80211_beacon_connection_loss_work); 4787 INIT_WORK(&ifmgd->csa_connection_drop_work, 4788 ieee80211_csa_connection_drop_work); 4789 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4790 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4791 ieee80211_tdls_peer_del_work); 4792 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4793 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4794 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4795 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4796 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4797 ieee80211_sta_handle_tspec_ac_params_wk); 4798 4799 ifmgd->flags = 0; 4800 ifmgd->powersave = sdata->wdev.ps; 4801 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4802 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4803 ifmgd->p2p_noa_index = -1; 4804 4805 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4806 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4807 else 4808 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4809 4810 /* Setup TDLS data */ 4811 spin_lock_init(&ifmgd->teardown_lock); 4812 ifmgd->teardown_skb = NULL; 4813 ifmgd->orig_teardown_skb = NULL; 4814 } 4815 4816 /* scan finished notification */ 4817 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4818 { 4819 struct ieee80211_sub_if_data *sdata; 4820 4821 /* Restart STA timers */ 4822 rcu_read_lock(); 4823 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4824 if (ieee80211_sdata_running(sdata)) 4825 ieee80211_restart_sta_timer(sdata); 4826 } 4827 rcu_read_unlock(); 4828 } 4829 4830 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4831 struct cfg80211_bss *cbss) 4832 { 4833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4834 const u8 *ht_cap_ie, *vht_cap_ie; 4835 const struct ieee80211_ht_cap *ht_cap; 4836 const struct ieee80211_vht_cap *vht_cap; 4837 u8 chains = 1; 4838 4839 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4840 return chains; 4841 4842 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4843 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4844 ht_cap = (void *)(ht_cap_ie + 2); 4845 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4846 /* 4847 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4848 * "Tx Unequal Modulation Supported" fields. 4849 */ 4850 } 4851 4852 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4853 return chains; 4854 4855 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4856 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4857 u8 nss; 4858 u16 tx_mcs_map; 4859 4860 vht_cap = (void *)(vht_cap_ie + 2); 4861 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4862 for (nss = 8; nss > 0; nss--) { 4863 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4864 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4865 break; 4866 } 4867 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4868 chains = max(chains, nss); 4869 } 4870 4871 return chains; 4872 } 4873 4874 static bool 4875 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4876 const struct ieee80211_he_operation *he_op) 4877 { 4878 const struct ieee80211_sta_he_cap *sta_he_cap = 4879 ieee80211_get_he_sta_cap(sband); 4880 u16 ap_min_req_set; 4881 int i; 4882 4883 if (!sta_he_cap || !he_op) 4884 return false; 4885 4886 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4887 4888 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4889 for (i = 0; i < 3; i++) { 4890 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4891 &sta_he_cap->he_mcs_nss_supp; 4892 u16 sta_mcs_map_rx = 4893 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4894 u16 sta_mcs_map_tx = 4895 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4896 u8 nss; 4897 bool verified = true; 4898 4899 /* 4900 * For each band there is a maximum of 8 spatial streams 4901 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4902 * of 2 bits per NSS (1-8), with the values defined in enum 4903 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4904 * capabilities aren't less than the AP's minimum requirements 4905 * for this HE BSS per SS. 4906 * It is enough to find one such band that meets the reqs. 4907 */ 4908 for (nss = 8; nss > 0; nss--) { 4909 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4910 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4911 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4912 4913 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4914 continue; 4915 4916 /* 4917 * Make sure the HE AP doesn't require MCSs that aren't 4918 * supported by the client 4919 */ 4920 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4921 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4922 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4923 verified = false; 4924 break; 4925 } 4926 } 4927 4928 if (verified) 4929 return true; 4930 } 4931 4932 /* If here, STA doesn't meet AP's HE min requirements */ 4933 return false; 4934 } 4935 4936 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4937 struct cfg80211_bss *cbss) 4938 { 4939 struct ieee80211_local *local = sdata->local; 4940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4941 const struct ieee80211_ht_cap *ht_cap = NULL; 4942 const struct ieee80211_ht_operation *ht_oper = NULL; 4943 const struct ieee80211_vht_operation *vht_oper = NULL; 4944 const struct ieee80211_he_operation *he_oper = NULL; 4945 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4946 struct ieee80211_supported_band *sband; 4947 struct cfg80211_chan_def chandef; 4948 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4949 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4950 struct ieee80211_bss *bss = (void *)cbss->priv; 4951 int ret; 4952 u32 i; 4953 bool have_80mhz; 4954 4955 sband = local->hw.wiphy->bands[cbss->channel->band]; 4956 4957 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4958 IEEE80211_STA_DISABLE_80P80MHZ | 4959 IEEE80211_STA_DISABLE_160MHZ); 4960 4961 /* disable HT/VHT/HE if we don't support them */ 4962 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4963 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4964 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4965 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4966 } 4967 4968 if (!sband->vht_cap.vht_supported && is_5ghz) { 4969 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4970 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4971 } 4972 4973 if (!ieee80211_get_he_sta_cap(sband)) 4974 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4975 4976 rcu_read_lock(); 4977 4978 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 4979 const u8 *ht_oper_ie, *ht_cap_ie; 4980 4981 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4982 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4983 ht_oper = (void *)(ht_oper_ie + 2); 4984 4985 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4986 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4987 ht_cap = (void *)(ht_cap_ie + 2); 4988 4989 if (!ht_cap) { 4990 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4991 ht_oper = NULL; 4992 } 4993 } 4994 4995 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 4996 const u8 *vht_oper_ie, *vht_cap; 4997 4998 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4999 WLAN_EID_VHT_OPERATION); 5000 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 5001 vht_oper = (void *)(vht_oper_ie + 2); 5002 if (vht_oper && !ht_oper) { 5003 vht_oper = NULL; 5004 sdata_info(sdata, 5005 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5006 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5007 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5008 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5009 } 5010 5011 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 5012 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 5013 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5014 vht_oper = NULL; 5015 } 5016 } 5017 5018 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5019 const struct cfg80211_bss_ies *ies; 5020 const u8 *he_oper_ie; 5021 5022 ies = rcu_dereference(cbss->ies); 5023 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 5024 ies->data, ies->len); 5025 if (he_oper_ie && 5026 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 5027 he_oper = (void *)(he_oper_ie + 3); 5028 else 5029 he_oper = NULL; 5030 5031 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 5032 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5033 } 5034 5035 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5036 have_80mhz = false; 5037 for (i = 0; i < sband->n_channels; i++) { 5038 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5039 IEEE80211_CHAN_NO_80MHZ)) 5040 continue; 5041 5042 have_80mhz = true; 5043 break; 5044 } 5045 5046 if (!have_80mhz) 5047 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5048 5049 if (sband->band == NL80211_BAND_S1GHZ) { 5050 const u8 *s1g_oper_ie; 5051 5052 s1g_oper_ie = ieee80211_bss_get_ie(cbss, 5053 WLAN_EID_S1G_OPERATION); 5054 if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper)) 5055 s1g_oper = (void *)(s1g_oper_ie + 2); 5056 else 5057 sdata_info(sdata, 5058 "AP missing S1G operation element?\n"); 5059 } 5060 5061 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5062 cbss->channel, 5063 bss->vht_cap_info, 5064 ht_oper, vht_oper, he_oper, 5065 s1g_oper, 5066 &chandef, false); 5067 5068 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5069 local->rx_chains); 5070 5071 rcu_read_unlock(); 5072 5073 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5074 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5075 return -EINVAL; 5076 } 5077 5078 /* will change later if needed */ 5079 sdata->smps_mode = IEEE80211_SMPS_OFF; 5080 5081 mutex_lock(&local->mtx); 5082 /* 5083 * If this fails (possibly due to channel context sharing 5084 * on incompatible channels, e.g. 80+80 and 160 sharing the 5085 * same control channel) try to use a smaller bandwidth. 5086 */ 5087 ret = ieee80211_vif_use_channel(sdata, &chandef, 5088 IEEE80211_CHANCTX_SHARED); 5089 5090 /* don't downgrade for 5 and 10 MHz channels, though. */ 5091 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5092 chandef.width == NL80211_CHAN_WIDTH_10) 5093 goto out; 5094 5095 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5096 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5097 ret = ieee80211_vif_use_channel(sdata, &chandef, 5098 IEEE80211_CHANCTX_SHARED); 5099 } 5100 out: 5101 mutex_unlock(&local->mtx); 5102 return ret; 5103 } 5104 5105 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5106 u8 *dtim_count, u8 *dtim_period) 5107 { 5108 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5109 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5110 ies->len); 5111 const struct ieee80211_tim_ie *tim = NULL; 5112 const struct ieee80211_bssid_index *idx; 5113 bool valid = tim_ie && tim_ie[1] >= 2; 5114 5115 if (valid) 5116 tim = (void *)(tim_ie + 2); 5117 5118 if (dtim_count) 5119 *dtim_count = valid ? tim->dtim_count : 0; 5120 5121 if (dtim_period) 5122 *dtim_period = valid ? tim->dtim_period : 0; 5123 5124 /* Check if value is overridden by non-transmitted profile */ 5125 if (!idx_ie || idx_ie[1] < 3) 5126 return valid; 5127 5128 idx = (void *)(idx_ie + 2); 5129 5130 if (dtim_count) 5131 *dtim_count = idx->dtim_count; 5132 5133 if (dtim_period) 5134 *dtim_period = idx->dtim_period; 5135 5136 return true; 5137 } 5138 5139 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5140 struct cfg80211_bss *cbss, bool assoc, 5141 bool override) 5142 { 5143 struct ieee80211_local *local = sdata->local; 5144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5145 struct ieee80211_bss *bss = (void *)cbss->priv; 5146 struct sta_info *new_sta = NULL; 5147 struct ieee80211_supported_band *sband; 5148 bool have_sta = false; 5149 int err; 5150 5151 sband = local->hw.wiphy->bands[cbss->channel->band]; 5152 5153 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5154 return -EINVAL; 5155 5156 /* If a reconfig is happening, bail out */ 5157 if (local->in_reconfig) 5158 return -EBUSY; 5159 5160 if (assoc) { 5161 rcu_read_lock(); 5162 have_sta = sta_info_get(sdata, cbss->bssid); 5163 rcu_read_unlock(); 5164 } 5165 5166 if (!have_sta) { 5167 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5168 if (!new_sta) 5169 return -ENOMEM; 5170 } 5171 5172 /* 5173 * Set up the information for the new channel before setting the 5174 * new channel. We can't - completely race-free - change the basic 5175 * rates bitmap and the channel (sband) that it refers to, but if 5176 * we set it up before we at least avoid calling into the driver's 5177 * bss_info_changed() method with invalid information (since we do 5178 * call that from changing the channel - only for IDLE and perhaps 5179 * some others, but ...). 5180 * 5181 * So to avoid that, just set up all the new information before the 5182 * channel, but tell the driver to apply it only afterwards, since 5183 * it might need the new channel for that. 5184 */ 5185 if (new_sta) { 5186 u32 rates = 0, basic_rates = 0; 5187 bool have_higher_than_11mbit; 5188 int min_rate = INT_MAX, min_rate_index = -1; 5189 const struct cfg80211_bss_ies *ies; 5190 int shift = ieee80211_vif_get_shift(&sdata->vif); 5191 5192 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5193 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5194 ieee80211_s1g_sta_rate_init(new_sta); 5195 goto skip_rates; 5196 } 5197 5198 ieee80211_get_rates(sband, bss->supp_rates, 5199 bss->supp_rates_len, 5200 &rates, &basic_rates, 5201 &have_higher_than_11mbit, 5202 &min_rate, &min_rate_index, 5203 shift); 5204 5205 /* 5206 * This used to be a workaround for basic rates missing 5207 * in the association response frame. Now that we no 5208 * longer use the basic rates from there, it probably 5209 * doesn't happen any more, but keep the workaround so 5210 * in case some *other* APs are buggy in different ways 5211 * we can connect -- with a warning. 5212 * Allow this workaround only in case the AP provided at least 5213 * one rate. 5214 */ 5215 if (min_rate_index < 0) { 5216 sdata_info(sdata, 5217 "No legacy rates in association response\n"); 5218 5219 sta_info_free(local, new_sta); 5220 return -EINVAL; 5221 } else if (!basic_rates) { 5222 sdata_info(sdata, 5223 "No basic rates, using min rate instead\n"); 5224 basic_rates = BIT(min_rate_index); 5225 } 5226 5227 if (rates) 5228 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5229 else 5230 sdata_info(sdata, 5231 "No rates found, keeping mandatory only\n"); 5232 5233 sdata->vif.bss_conf.basic_rates = basic_rates; 5234 5235 /* cf. IEEE 802.11 9.2.12 */ 5236 if (cbss->channel->band == NL80211_BAND_2GHZ && 5237 have_higher_than_11mbit) 5238 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5239 else 5240 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5241 5242 skip_rates: 5243 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5244 5245 /* set timing information */ 5246 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5247 rcu_read_lock(); 5248 ies = rcu_dereference(cbss->beacon_ies); 5249 if (ies) { 5250 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5251 sdata->vif.bss_conf.sync_device_ts = 5252 bss->device_ts_beacon; 5253 5254 ieee80211_get_dtim(ies, 5255 &sdata->vif.bss_conf.sync_dtim_count, 5256 NULL); 5257 } else if (!ieee80211_hw_check(&sdata->local->hw, 5258 TIMING_BEACON_ONLY)) { 5259 ies = rcu_dereference(cbss->proberesp_ies); 5260 /* must be non-NULL since beacon IEs were NULL */ 5261 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5262 sdata->vif.bss_conf.sync_device_ts = 5263 bss->device_ts_presp; 5264 sdata->vif.bss_conf.sync_dtim_count = 0; 5265 } else { 5266 sdata->vif.bss_conf.sync_tsf = 0; 5267 sdata->vif.bss_conf.sync_device_ts = 0; 5268 sdata->vif.bss_conf.sync_dtim_count = 0; 5269 } 5270 rcu_read_unlock(); 5271 } 5272 5273 if (new_sta || override) { 5274 err = ieee80211_prep_channel(sdata, cbss); 5275 if (err) { 5276 if (new_sta) 5277 sta_info_free(local, new_sta); 5278 return -EINVAL; 5279 } 5280 } 5281 5282 if (new_sta) { 5283 /* 5284 * tell driver about BSSID, basic rates and timing 5285 * this was set up above, before setting the channel 5286 */ 5287 ieee80211_bss_info_change_notify(sdata, 5288 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5289 BSS_CHANGED_BEACON_INT); 5290 5291 if (assoc) 5292 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5293 5294 err = sta_info_insert(new_sta); 5295 new_sta = NULL; 5296 if (err) { 5297 sdata_info(sdata, 5298 "failed to insert STA entry for the AP (error %d)\n", 5299 err); 5300 return err; 5301 } 5302 } else 5303 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5304 5305 /* Cancel scan to ensure that nothing interferes with connection */ 5306 if (local->scanning) 5307 ieee80211_scan_cancel(local); 5308 5309 return 0; 5310 } 5311 5312 /* config hooks */ 5313 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5314 struct cfg80211_auth_request *req) 5315 { 5316 struct ieee80211_local *local = sdata->local; 5317 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5318 struct ieee80211_mgd_auth_data *auth_data; 5319 u16 auth_alg; 5320 int err; 5321 bool cont_auth; 5322 5323 /* prepare auth data structure */ 5324 5325 switch (req->auth_type) { 5326 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5327 auth_alg = WLAN_AUTH_OPEN; 5328 break; 5329 case NL80211_AUTHTYPE_SHARED_KEY: 5330 if (fips_enabled) 5331 return -EOPNOTSUPP; 5332 auth_alg = WLAN_AUTH_SHARED_KEY; 5333 break; 5334 case NL80211_AUTHTYPE_FT: 5335 auth_alg = WLAN_AUTH_FT; 5336 break; 5337 case NL80211_AUTHTYPE_NETWORK_EAP: 5338 auth_alg = WLAN_AUTH_LEAP; 5339 break; 5340 case NL80211_AUTHTYPE_SAE: 5341 auth_alg = WLAN_AUTH_SAE; 5342 break; 5343 case NL80211_AUTHTYPE_FILS_SK: 5344 auth_alg = WLAN_AUTH_FILS_SK; 5345 break; 5346 case NL80211_AUTHTYPE_FILS_SK_PFS: 5347 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5348 break; 5349 case NL80211_AUTHTYPE_FILS_PK: 5350 auth_alg = WLAN_AUTH_FILS_PK; 5351 break; 5352 default: 5353 return -EOPNOTSUPP; 5354 } 5355 5356 if (ifmgd->assoc_data) 5357 return -EBUSY; 5358 5359 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5360 req->ie_len, GFP_KERNEL); 5361 if (!auth_data) 5362 return -ENOMEM; 5363 5364 auth_data->bss = req->bss; 5365 5366 if (req->auth_data_len >= 4) { 5367 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5368 __le16 *pos = (__le16 *) req->auth_data; 5369 5370 auth_data->sae_trans = le16_to_cpu(pos[0]); 5371 auth_data->sae_status = le16_to_cpu(pos[1]); 5372 } 5373 memcpy(auth_data->data, req->auth_data + 4, 5374 req->auth_data_len - 4); 5375 auth_data->data_len += req->auth_data_len - 4; 5376 } 5377 5378 /* Check if continuing authentication or trying to authenticate with the 5379 * same BSS that we were in the process of authenticating with and avoid 5380 * removal and re-addition of the STA entry in 5381 * ieee80211_prep_connection(). 5382 */ 5383 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5384 5385 if (req->ie && req->ie_len) { 5386 memcpy(&auth_data->data[auth_data->data_len], 5387 req->ie, req->ie_len); 5388 auth_data->data_len += req->ie_len; 5389 } 5390 5391 if (req->key && req->key_len) { 5392 auth_data->key_len = req->key_len; 5393 auth_data->key_idx = req->key_idx; 5394 memcpy(auth_data->key, req->key, req->key_len); 5395 } 5396 5397 auth_data->algorithm = auth_alg; 5398 5399 /* try to authenticate/probe */ 5400 5401 if (ifmgd->auth_data) { 5402 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5403 auth_data->peer_confirmed = 5404 ifmgd->auth_data->peer_confirmed; 5405 } 5406 ieee80211_destroy_auth_data(sdata, cont_auth); 5407 } 5408 5409 /* prep auth_data so we don't go into idle on disassoc */ 5410 ifmgd->auth_data = auth_data; 5411 5412 /* If this is continuation of an ongoing SAE authentication exchange 5413 * (i.e., request to send SAE Confirm) and the peer has already 5414 * confirmed, mark authentication completed since we are about to send 5415 * out SAE Confirm. 5416 */ 5417 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5418 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5419 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5420 5421 if (ifmgd->associated) { 5422 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5423 5424 sdata_info(sdata, 5425 "disconnect from AP %pM for new auth to %pM\n", 5426 ifmgd->associated->bssid, req->bss->bssid); 5427 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5428 WLAN_REASON_UNSPECIFIED, 5429 false, frame_buf); 5430 5431 ieee80211_report_disconnect(sdata, frame_buf, 5432 sizeof(frame_buf), true, 5433 WLAN_REASON_UNSPECIFIED); 5434 } 5435 5436 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5437 5438 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5439 if (err) 5440 goto err_clear; 5441 5442 err = ieee80211_auth(sdata); 5443 if (err) { 5444 sta_info_destroy_addr(sdata, req->bss->bssid); 5445 goto err_clear; 5446 } 5447 5448 /* hold our own reference */ 5449 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5450 return 0; 5451 5452 err_clear: 5453 eth_zero_addr(ifmgd->bssid); 5454 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5455 ifmgd->auth_data = NULL; 5456 mutex_lock(&sdata->local->mtx); 5457 ieee80211_vif_release_channel(sdata); 5458 mutex_unlock(&sdata->local->mtx); 5459 kfree(auth_data); 5460 return err; 5461 } 5462 5463 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5464 struct cfg80211_assoc_request *req) 5465 { 5466 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5467 struct ieee80211_local *local = sdata->local; 5468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5469 struct ieee80211_bss *bss = (void *)req->bss->priv; 5470 struct ieee80211_mgd_assoc_data *assoc_data; 5471 const struct cfg80211_bss_ies *beacon_ies; 5472 struct ieee80211_supported_band *sband; 5473 const u8 *ssidie, *ht_ie, *vht_ie; 5474 int i, err; 5475 bool override = false; 5476 5477 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5478 if (!assoc_data) 5479 return -ENOMEM; 5480 5481 rcu_read_lock(); 5482 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5483 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5484 rcu_read_unlock(); 5485 kfree(assoc_data); 5486 return -EINVAL; 5487 } 5488 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5489 assoc_data->ssid_len = ssidie[1]; 5490 rcu_read_unlock(); 5491 5492 if (ifmgd->associated) { 5493 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5494 5495 sdata_info(sdata, 5496 "disconnect from AP %pM for new assoc to %pM\n", 5497 ifmgd->associated->bssid, req->bss->bssid); 5498 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5499 WLAN_REASON_UNSPECIFIED, 5500 false, frame_buf); 5501 5502 ieee80211_report_disconnect(sdata, frame_buf, 5503 sizeof(frame_buf), true, 5504 WLAN_REASON_UNSPECIFIED); 5505 } 5506 5507 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5508 err = -EBUSY; 5509 goto err_free; 5510 } 5511 5512 if (ifmgd->assoc_data) { 5513 err = -EBUSY; 5514 goto err_free; 5515 } 5516 5517 if (ifmgd->auth_data) { 5518 bool match; 5519 5520 /* keep sta info, bssid if matching */ 5521 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5522 ieee80211_destroy_auth_data(sdata, match); 5523 } 5524 5525 /* prepare assoc data */ 5526 5527 ifmgd->beacon_crc_valid = false; 5528 5529 assoc_data->wmm = bss->wmm_used && 5530 (local->hw.queues >= IEEE80211_NUM_ACS); 5531 5532 /* 5533 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5534 * We still associate in non-HT mode (11a/b/g) if any one of these 5535 * ciphers is configured as pairwise. 5536 * We can set this to true for non-11n hardware, that'll be checked 5537 * separately along with the peer capabilities. 5538 */ 5539 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5540 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5541 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5542 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5543 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5544 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5545 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5546 netdev_info(sdata->dev, 5547 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5548 } 5549 } 5550 5551 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5552 5553 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5554 if (!bss->wmm_used) { 5555 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5556 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5557 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5558 netdev_info(sdata->dev, 5559 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5560 } 5561 5562 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5563 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5564 sizeof(ifmgd->ht_capa_mask)); 5565 5566 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5567 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5568 sizeof(ifmgd->vht_capa_mask)); 5569 5570 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5571 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5572 sizeof(ifmgd->s1g_capa_mask)); 5573 5574 if (req->ie && req->ie_len) { 5575 memcpy(assoc_data->ie, req->ie, req->ie_len); 5576 assoc_data->ie_len = req->ie_len; 5577 } 5578 5579 if (req->fils_kek) { 5580 /* should already be checked in cfg80211 - so warn */ 5581 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5582 err = -EINVAL; 5583 goto err_free; 5584 } 5585 memcpy(assoc_data->fils_kek, req->fils_kek, 5586 req->fils_kek_len); 5587 assoc_data->fils_kek_len = req->fils_kek_len; 5588 } 5589 5590 if (req->fils_nonces) 5591 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5592 2 * FILS_NONCE_LEN); 5593 5594 assoc_data->bss = req->bss; 5595 5596 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5597 if (ifmgd->powersave) 5598 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5599 else 5600 sdata->smps_mode = IEEE80211_SMPS_OFF; 5601 } else 5602 sdata->smps_mode = ifmgd->req_smps; 5603 5604 assoc_data->capability = req->bss->capability; 5605 assoc_data->supp_rates = bss->supp_rates; 5606 assoc_data->supp_rates_len = bss->supp_rates_len; 5607 5608 rcu_read_lock(); 5609 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5610 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5611 assoc_data->ap_ht_param = 5612 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5613 else if (!is_6ghz) 5614 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5615 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5616 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5617 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5618 sizeof(struct ieee80211_vht_cap)); 5619 else if (!is_6ghz) 5620 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5621 IEEE80211_STA_DISABLE_HE; 5622 rcu_read_unlock(); 5623 5624 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5625 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5626 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5627 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5628 5629 if (bss->wmm_used && bss->uapsd_supported && 5630 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5631 assoc_data->uapsd = true; 5632 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5633 } else { 5634 assoc_data->uapsd = false; 5635 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5636 } 5637 5638 if (req->prev_bssid) 5639 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5640 5641 if (req->use_mfp) { 5642 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5643 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5644 } else { 5645 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5646 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5647 } 5648 5649 if (req->flags & ASSOC_REQ_USE_RRM) 5650 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5651 else 5652 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5653 5654 if (req->crypto.control_port) 5655 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5656 else 5657 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5658 5659 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5660 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5661 sdata->control_port_over_nl80211 = 5662 req->crypto.control_port_over_nl80211; 5663 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5664 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5665 sdata->vif.type); 5666 5667 /* kick off associate process */ 5668 5669 ifmgd->assoc_data = assoc_data; 5670 ifmgd->dtim_period = 0; 5671 ifmgd->have_beacon = false; 5672 5673 /* override HT/VHT configuration only if the AP and we support it */ 5674 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5675 struct ieee80211_sta_ht_cap sta_ht_cap; 5676 5677 if (req->flags & ASSOC_REQ_DISABLE_HT) 5678 override = true; 5679 5680 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5681 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5682 5683 /* check for 40 MHz disable override */ 5684 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5685 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5686 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5687 override = true; 5688 5689 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5690 req->flags & ASSOC_REQ_DISABLE_VHT) 5691 override = true; 5692 } 5693 5694 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5695 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5696 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5697 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5698 } 5699 5700 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5701 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5702 5703 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5704 if (err) 5705 goto err_clear; 5706 5707 rcu_read_lock(); 5708 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5709 5710 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5711 !beacon_ies) { 5712 /* 5713 * Wait up to one beacon interval ... 5714 * should this be more if we miss one? 5715 */ 5716 sdata_info(sdata, "waiting for beacon from %pM\n", 5717 ifmgd->bssid); 5718 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5719 assoc_data->timeout_started = true; 5720 assoc_data->need_beacon = true; 5721 } else if (beacon_ies) { 5722 const struct element *elem; 5723 u8 dtim_count = 0; 5724 5725 ieee80211_get_dtim(beacon_ies, &dtim_count, 5726 &ifmgd->dtim_period); 5727 5728 ifmgd->have_beacon = true; 5729 assoc_data->timeout = jiffies; 5730 assoc_data->timeout_started = true; 5731 5732 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5733 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5734 sdata->vif.bss_conf.sync_device_ts = 5735 bss->device_ts_beacon; 5736 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5737 } 5738 5739 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5740 beacon_ies->data, beacon_ies->len); 5741 if (elem && elem->datalen >= 3) 5742 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5743 5744 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5745 beacon_ies->data, beacon_ies->len); 5746 if (elem && elem->datalen >= 11 && 5747 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5748 sdata->vif.bss_conf.ema_ap = true; 5749 } else { 5750 assoc_data->timeout = jiffies; 5751 assoc_data->timeout_started = true; 5752 } 5753 rcu_read_unlock(); 5754 5755 run_again(sdata, assoc_data->timeout); 5756 5757 if (bss->corrupt_data) { 5758 char *corrupt_type = "data"; 5759 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5760 if (bss->corrupt_data & 5761 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5762 corrupt_type = "beacon and probe response"; 5763 else 5764 corrupt_type = "beacon"; 5765 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5766 corrupt_type = "probe response"; 5767 sdata_info(sdata, "associating with AP with corrupt %s\n", 5768 corrupt_type); 5769 } 5770 5771 return 0; 5772 err_clear: 5773 eth_zero_addr(ifmgd->bssid); 5774 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5775 ifmgd->assoc_data = NULL; 5776 err_free: 5777 kfree(assoc_data); 5778 return err; 5779 } 5780 5781 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5782 struct cfg80211_deauth_request *req) 5783 { 5784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5785 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5786 bool tx = !req->local_state_change; 5787 5788 if (ifmgd->auth_data && 5789 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5790 sdata_info(sdata, 5791 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5792 req->bssid, req->reason_code, 5793 ieee80211_get_reason_code_string(req->reason_code)); 5794 5795 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5796 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5797 IEEE80211_STYPE_DEAUTH, 5798 req->reason_code, tx, 5799 frame_buf); 5800 ieee80211_destroy_auth_data(sdata, false); 5801 ieee80211_report_disconnect(sdata, frame_buf, 5802 sizeof(frame_buf), true, 5803 req->reason_code); 5804 5805 return 0; 5806 } 5807 5808 if (ifmgd->assoc_data && 5809 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5810 sdata_info(sdata, 5811 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5812 req->bssid, req->reason_code, 5813 ieee80211_get_reason_code_string(req->reason_code)); 5814 5815 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5816 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5817 IEEE80211_STYPE_DEAUTH, 5818 req->reason_code, tx, 5819 frame_buf); 5820 ieee80211_destroy_assoc_data(sdata, false, true); 5821 ieee80211_report_disconnect(sdata, frame_buf, 5822 sizeof(frame_buf), true, 5823 req->reason_code); 5824 return 0; 5825 } 5826 5827 if (ifmgd->associated && 5828 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5829 sdata_info(sdata, 5830 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5831 req->bssid, req->reason_code, 5832 ieee80211_get_reason_code_string(req->reason_code)); 5833 5834 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5835 req->reason_code, tx, frame_buf); 5836 ieee80211_report_disconnect(sdata, frame_buf, 5837 sizeof(frame_buf), true, 5838 req->reason_code); 5839 return 0; 5840 } 5841 5842 return -ENOTCONN; 5843 } 5844 5845 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5846 struct cfg80211_disassoc_request *req) 5847 { 5848 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5849 u8 bssid[ETH_ALEN]; 5850 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5851 5852 /* 5853 * cfg80211 should catch this ... but it's racy since 5854 * we can receive a disassoc frame, process it, hand it 5855 * to cfg80211 while that's in a locked section already 5856 * trying to tell us that the user wants to disconnect. 5857 */ 5858 if (ifmgd->associated != req->bss) 5859 return -ENOLINK; 5860 5861 sdata_info(sdata, 5862 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5863 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5864 5865 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5866 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5867 req->reason_code, !req->local_state_change, 5868 frame_buf); 5869 5870 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5871 req->reason_code); 5872 5873 return 0; 5874 } 5875 5876 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5877 { 5878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5879 5880 /* 5881 * Make sure some work items will not run after this, 5882 * they will not do anything but might not have been 5883 * cancelled when disconnecting. 5884 */ 5885 cancel_work_sync(&ifmgd->monitor_work); 5886 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5887 cancel_work_sync(&ifmgd->request_smps_work); 5888 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5889 cancel_work_sync(&ifmgd->chswitch_work); 5890 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5891 5892 sdata_lock(sdata); 5893 if (ifmgd->assoc_data) { 5894 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5895 ieee80211_destroy_assoc_data(sdata, false, false); 5896 cfg80211_assoc_timeout(sdata->dev, bss); 5897 } 5898 if (ifmgd->auth_data) 5899 ieee80211_destroy_auth_data(sdata, false); 5900 spin_lock_bh(&ifmgd->teardown_lock); 5901 if (ifmgd->teardown_skb) { 5902 kfree_skb(ifmgd->teardown_skb); 5903 ifmgd->teardown_skb = NULL; 5904 ifmgd->orig_teardown_skb = NULL; 5905 } 5906 kfree(ifmgd->assoc_req_ies); 5907 ifmgd->assoc_req_ies = NULL; 5908 ifmgd->assoc_req_ies_len = 0; 5909 spin_unlock_bh(&ifmgd->teardown_lock); 5910 del_timer_sync(&ifmgd->timer); 5911 sdata_unlock(sdata); 5912 } 5913 5914 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5915 enum nl80211_cqm_rssi_threshold_event rssi_event, 5916 s32 rssi_level, 5917 gfp_t gfp) 5918 { 5919 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5920 5921 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5922 5923 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5924 } 5925 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5926 5927 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5928 { 5929 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5930 5931 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5932 5933 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5934 } 5935 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5936