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 - 2019 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 const struct ieee80211_ht_operation *ht_oper, 149 const struct ieee80211_vht_operation *vht_oper, 150 const struct ieee80211_he_operation *he_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->center_freq2 = 0; 165 166 if (!ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 174 channel->band); 175 /* check that channel matches the right operating channel */ 176 if (!tracking && channel->center_freq != ht_cfreq) { 177 /* 178 * It's possible that some APs are confused here; 179 * Netgear WNDR3700 sometimes reports 4 higher than 180 * the actual channel in association responses, but 181 * since we look at probe response/beacon data here 182 * it should be OK. 183 */ 184 sdata_info(sdata, 185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 186 channel->center_freq, ht_cfreq, 187 ht_oper->primary_chan, channel->band); 188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 189 goto out; 190 } 191 192 /* check 40 MHz support, if we have it */ 193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 194 ieee80211_chandef_ht_oper(ht_oper, chandef); 195 } else { 196 /* 40 MHz (and 80 MHz) must be supported for VHT */ 197 ret = IEEE80211_STA_DISABLE_VHT; 198 /* also mark 40 MHz disabled */ 199 ret |= IEEE80211_STA_DISABLE_40MHZ; 200 goto out; 201 } 202 203 if (!vht_oper || !sband->vht_cap.vht_supported) { 204 ret = IEEE80211_STA_DISABLE_VHT; 205 goto out; 206 } 207 208 vht_chandef = *chandef; 209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 210 (le32_to_cpu(he_oper->he_oper_params) & 211 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 212 struct ieee80211_vht_operation he_oper_vht_cap; 213 214 /* 215 * Set only first 3 bytes (other 2 aren't used in 216 * ieee80211_chandef_vht_oper() anyway) 217 */ 218 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 219 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 220 221 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 222 &he_oper_vht_cap, ht_oper, 223 &vht_chandef)) { 224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 225 sdata_info(sdata, 226 "HE AP VHT information is invalid, disable HE\n"); 227 ret = IEEE80211_STA_DISABLE_HE; 228 goto out; 229 } 230 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 231 ht_oper, &vht_chandef)) { 232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 233 sdata_info(sdata, 234 "AP VHT information is invalid, disable VHT\n"); 235 ret = IEEE80211_STA_DISABLE_VHT; 236 goto out; 237 } 238 239 if (!cfg80211_chandef_valid(&vht_chandef)) { 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 241 sdata_info(sdata, 242 "AP VHT information is invalid, disable VHT\n"); 243 ret = IEEE80211_STA_DISABLE_VHT; 244 goto out; 245 } 246 247 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 248 ret = 0; 249 goto out; 250 } 251 252 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 254 sdata_info(sdata, 255 "AP VHT information doesn't match HT, disable VHT\n"); 256 ret = IEEE80211_STA_DISABLE_VHT; 257 goto out; 258 } 259 260 *chandef = vht_chandef; 261 262 ret = 0; 263 264 out: 265 /* 266 * When tracking the current AP, don't do any further checks if the 267 * new chandef is identical to the one we're currently using for the 268 * connection. This keeps us from playing ping-pong with regulatory, 269 * without it the following can happen (for example): 270 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 271 * - AP advertises regdom US 272 * - CRDA loads regdom US with 80 MHz prohibited (old database) 273 * - the code below detects an unsupported channel, downgrades, and 274 * we disconnect from the AP in the caller 275 * - disconnect causes CRDA to reload world regdomain and the game 276 * starts anew. 277 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 278 * 279 * It seems possible that there are still scenarios with CSA or real 280 * bandwidth changes where a this could happen, but those cases are 281 * less common and wouldn't completely prevent using the AP. 282 */ 283 if (tracking && 284 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 285 return ret; 286 287 /* don't print the message below for VHT mismatch if VHT is disabled */ 288 if (ret & IEEE80211_STA_DISABLE_VHT) 289 vht_chandef = *chandef; 290 291 /* 292 * Ignore the DISABLED flag when we're already connected and only 293 * tracking the APs beacon for bandwidth changes - otherwise we 294 * might get disconnected here if we connect to an AP, update our 295 * regulatory information based on the AP's country IE and the 296 * information we have is wrong/outdated and disables the channel 297 * that we're actually using for the connection to the AP. 298 */ 299 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 300 tracking ? 0 : 301 IEEE80211_CHAN_DISABLED)) { 302 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 303 ret = IEEE80211_STA_DISABLE_HT | 304 IEEE80211_STA_DISABLE_VHT; 305 break; 306 } 307 308 ret |= ieee80211_chandef_downgrade(chandef); 309 } 310 311 if (chandef->width != vht_chandef.width && !tracking) 312 sdata_info(sdata, 313 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 314 315 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 316 return ret; 317 } 318 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 320 struct sta_info *sta, 321 const struct ieee80211_ht_cap *ht_cap, 322 const struct ieee80211_ht_operation *ht_oper, 323 const struct ieee80211_vht_operation *vht_oper, 324 const struct ieee80211_he_operation *he_oper, 325 const u8 *bssid, u32 *changed) 326 { 327 struct ieee80211_local *local = sdata->local; 328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 329 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 330 struct ieee80211_supported_band *sband = 331 local->hw.wiphy->bands[chan->band]; 332 struct cfg80211_chan_def chandef; 333 u16 ht_opmode; 334 u32 flags; 335 enum ieee80211_sta_rx_bandwidth new_sta_bw; 336 int ret; 337 338 /* if HT was/is disabled, don't track any bandwidth changes */ 339 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 340 return 0; 341 342 /* don't check VHT if we associated as non-VHT station */ 343 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 344 vht_oper = NULL; 345 346 /* don't check HE if we associated as non-HE station */ 347 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 348 !ieee80211_get_he_sta_cap(sband)) 349 he_oper = NULL; 350 351 if (WARN_ON_ONCE(!sta)) 352 return -EINVAL; 353 354 /* 355 * if bss configuration changed store the new one - 356 * this may be applicable even if channel is identical 357 */ 358 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 359 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 360 *changed |= BSS_CHANGED_HT; 361 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 362 } 363 364 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 365 flags = ieee80211_determine_chantype(sdata, sband, chan, 366 ht_oper, vht_oper, he_oper, 367 &chandef, true); 368 369 /* 370 * Downgrade the new channel if we associated with restricted 371 * capabilities. For example, if we associated as a 20 MHz STA 372 * to a 40 MHz AP (due to regulatory, capabilities or config 373 * reasons) then switching to a 40 MHz channel now won't do us 374 * any good -- we couldn't use it with the AP. 375 */ 376 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 377 chandef.width == NL80211_CHAN_WIDTH_80P80) 378 flags |= ieee80211_chandef_downgrade(&chandef); 379 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 380 chandef.width == NL80211_CHAN_WIDTH_160) 381 flags |= ieee80211_chandef_downgrade(&chandef); 382 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 383 chandef.width > NL80211_CHAN_WIDTH_20) 384 flags |= ieee80211_chandef_downgrade(&chandef); 385 386 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 387 return 0; 388 389 sdata_info(sdata, 390 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 391 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 392 chandef.center_freq1, chandef.center_freq2); 393 394 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 395 IEEE80211_STA_DISABLE_VHT | 396 IEEE80211_STA_DISABLE_40MHZ | 397 IEEE80211_STA_DISABLE_80P80MHZ | 398 IEEE80211_STA_DISABLE_160MHZ)) || 399 !cfg80211_chandef_valid(&chandef)) { 400 sdata_info(sdata, 401 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 402 ifmgd->bssid); 403 return -EINVAL; 404 } 405 406 switch (chandef.width) { 407 case NL80211_CHAN_WIDTH_20_NOHT: 408 case NL80211_CHAN_WIDTH_20: 409 new_sta_bw = IEEE80211_STA_RX_BW_20; 410 break; 411 case NL80211_CHAN_WIDTH_40: 412 new_sta_bw = IEEE80211_STA_RX_BW_40; 413 break; 414 case NL80211_CHAN_WIDTH_80: 415 new_sta_bw = IEEE80211_STA_RX_BW_80; 416 break; 417 case NL80211_CHAN_WIDTH_80P80: 418 case NL80211_CHAN_WIDTH_160: 419 new_sta_bw = IEEE80211_STA_RX_BW_160; 420 break; 421 default: 422 return -EINVAL; 423 } 424 425 if (new_sta_bw > sta->cur_max_bandwidth) 426 new_sta_bw = sta->cur_max_bandwidth; 427 428 if (new_sta_bw < sta->sta.bandwidth) { 429 sta->sta.bandwidth = new_sta_bw; 430 rate_control_rate_update(local, sband, sta, 431 IEEE80211_RC_BW_CHANGED); 432 } 433 434 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 435 if (ret) { 436 sdata_info(sdata, 437 "AP %pM changed bandwidth to incompatible one - disconnect\n", 438 ifmgd->bssid); 439 return ret; 440 } 441 442 if (new_sta_bw > sta->sta.bandwidth) { 443 sta->sta.bandwidth = new_sta_bw; 444 rate_control_rate_update(local, sband, sta, 445 IEEE80211_RC_BW_CHANGED); 446 } 447 448 return 0; 449 } 450 451 /* frame sending functions */ 452 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 454 struct sk_buff *skb, u8 ap_ht_param, 455 struct ieee80211_supported_band *sband, 456 struct ieee80211_channel *channel, 457 enum ieee80211_smps_mode smps) 458 { 459 u8 *pos; 460 u32 flags = channel->flags; 461 u16 cap; 462 struct ieee80211_sta_ht_cap ht_cap; 463 464 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 465 466 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 467 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 468 469 /* determine capability flags */ 470 cap = ht_cap.cap; 471 472 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 473 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 474 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 475 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 476 cap &= ~IEEE80211_HT_CAP_SGI_40; 477 } 478 break; 479 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 480 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 481 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 482 cap &= ~IEEE80211_HT_CAP_SGI_40; 483 } 484 break; 485 } 486 487 /* 488 * If 40 MHz was disabled associate as though we weren't 489 * capable of 40 MHz -- some broken APs will never fall 490 * back to trying to transmit in 20 MHz. 491 */ 492 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 494 cap &= ~IEEE80211_HT_CAP_SGI_40; 495 } 496 497 /* set SM PS mode properly */ 498 cap &= ~IEEE80211_HT_CAP_SM_PS; 499 switch (smps) { 500 case IEEE80211_SMPS_AUTOMATIC: 501 case IEEE80211_SMPS_NUM_MODES: 502 WARN_ON(1); 503 /* fall through */ 504 case IEEE80211_SMPS_OFF: 505 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 506 IEEE80211_HT_CAP_SM_PS_SHIFT; 507 break; 508 case IEEE80211_SMPS_STATIC: 509 cap |= WLAN_HT_CAP_SM_PS_STATIC << 510 IEEE80211_HT_CAP_SM_PS_SHIFT; 511 break; 512 case IEEE80211_SMPS_DYNAMIC: 513 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 514 IEEE80211_HT_CAP_SM_PS_SHIFT; 515 break; 516 } 517 518 /* reserve and fill IE */ 519 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 520 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 521 } 522 523 /* This function determines vht capability flags for the association 524 * and builds the IE. 525 * Note - the function may set the owner of the MU-MIMO capability 526 */ 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 528 struct sk_buff *skb, 529 struct ieee80211_supported_band *sband, 530 struct ieee80211_vht_cap *ap_vht_cap) 531 { 532 struct ieee80211_local *local = sdata->local; 533 u8 *pos; 534 u32 cap; 535 struct ieee80211_sta_vht_cap vht_cap; 536 u32 mask, ap_bf_sts, our_bf_sts; 537 538 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 539 540 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 541 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 542 543 /* determine capability flags */ 544 cap = vht_cap.cap; 545 546 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 547 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 548 549 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 550 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 551 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 552 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 553 } 554 555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 556 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 558 } 559 560 /* 561 * Some APs apparently get confused if our capabilities are better 562 * than theirs, so restrict what we advertise in the assoc request. 563 */ 564 if (!(ap_vht_cap->vht_cap_info & 565 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 566 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 567 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 568 else if (!(ap_vht_cap->vht_cap_info & 569 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 572 /* 573 * If some other vif is using the MU-MIMO capablity we cannot associate 574 * using MU-MIMO - this will lead to contradictions in the group-id 575 * mechanism. 576 * Ownership is defined since association request, in order to avoid 577 * simultaneous associations with MU-MIMO. 578 */ 579 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 580 bool disable_mu_mimo = false; 581 struct ieee80211_sub_if_data *other; 582 583 list_for_each_entry_rcu(other, &local->interfaces, list) { 584 if (other->vif.mu_mimo_owner) { 585 disable_mu_mimo = true; 586 break; 587 } 588 } 589 if (disable_mu_mimo) 590 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 591 else 592 sdata->vif.mu_mimo_owner = true; 593 } 594 595 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 596 597 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 598 our_bf_sts = cap & mask; 599 600 if (ap_bf_sts < our_bf_sts) { 601 cap &= ~mask; 602 cap |= ap_bf_sts; 603 } 604 605 /* reserve and fill IE */ 606 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 607 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 608 } 609 610 /* This function determines HE capability flags for the association 611 * and builds the IE. 612 */ 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 614 struct sk_buff *skb, 615 struct ieee80211_supported_band *sband) 616 { 617 u8 *pos; 618 const struct ieee80211_sta_he_cap *he_cap = NULL; 619 u8 he_cap_size; 620 621 he_cap = ieee80211_get_he_sta_cap(sband); 622 if (!he_cap) 623 return; 624 625 /* 626 * TODO: the 1 added is because this temporarily is under the EXTENSION 627 * IE. Get rid of it when it moves. 628 */ 629 he_cap_size = 630 2 + 1 + sizeof(he_cap->he_cap_elem) + 631 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 632 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 633 he_cap->he_cap_elem.phy_cap_info); 634 pos = skb_put(skb, he_cap_size); 635 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 636 } 637 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 639 { 640 struct ieee80211_local *local = sdata->local; 641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 642 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 643 struct sk_buff *skb; 644 struct ieee80211_mgmt *mgmt; 645 u8 *pos, qos_info, *ie_start; 646 size_t offset = 0, noffset; 647 int i, count, rates_len, supp_rates_len, shift; 648 u16 capab; 649 struct ieee80211_supported_band *sband; 650 struct ieee80211_chanctx_conf *chanctx_conf; 651 struct ieee80211_channel *chan; 652 u32 rates = 0; 653 654 sdata_assert_lock(sdata); 655 656 rcu_read_lock(); 657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 658 if (WARN_ON(!chanctx_conf)) { 659 rcu_read_unlock(); 660 return; 661 } 662 chan = chanctx_conf->def.chan; 663 rcu_read_unlock(); 664 sband = local->hw.wiphy->bands[chan->band]; 665 shift = ieee80211_vif_get_shift(&sdata->vif); 666 667 if (assoc_data->supp_rates_len) { 668 /* 669 * Get all rates supported by the device and the AP as 670 * some APs don't like getting a superset of their rates 671 * in the association request (e.g. D-Link DAP 1353 in 672 * b-only mode)... 673 */ 674 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 675 assoc_data->supp_rates, 676 assoc_data->supp_rates_len, 677 &rates); 678 } else { 679 /* 680 * In case AP not provide any supported rates information 681 * before association, we send information element(s) with 682 * all rates that we support. 683 */ 684 rates_len = 0; 685 for (i = 0; i < sband->n_bitrates; i++) { 686 rates |= BIT(i); 687 rates_len++; 688 } 689 } 690 691 skb = alloc_skb(local->hw.extra_tx_headroom + 692 sizeof(*mgmt) + /* bit too much but doesn't matter */ 693 2 + assoc_data->ssid_len + /* SSID */ 694 4 + rates_len + /* (extended) rates */ 695 4 + /* power capability */ 696 2 + 2 * sband->n_channels + /* supported channels */ 697 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 698 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 699 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 700 sizeof(struct ieee80211_he_mcs_nss_supp) + 701 IEEE80211_HE_PPE_THRES_MAX_LEN + 702 assoc_data->ie_len + /* extra IEs */ 703 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 704 9, /* WMM */ 705 GFP_KERNEL); 706 if (!skb) 707 return; 708 709 skb_reserve(skb, local->hw.extra_tx_headroom); 710 711 capab = WLAN_CAPABILITY_ESS; 712 713 if (sband->band == NL80211_BAND_2GHZ) { 714 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 715 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 716 } 717 718 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 719 capab |= WLAN_CAPABILITY_PRIVACY; 720 721 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 722 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 723 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 724 725 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 726 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 727 728 mgmt = skb_put_zero(skb, 24); 729 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 731 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 732 733 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 734 skb_put(skb, 10); 735 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 736 IEEE80211_STYPE_REASSOC_REQ); 737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 738 mgmt->u.reassoc_req.listen_interval = 739 cpu_to_le16(local->hw.conf.listen_interval); 740 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 741 ETH_ALEN); 742 } else { 743 skb_put(skb, 4); 744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 745 IEEE80211_STYPE_ASSOC_REQ); 746 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 747 mgmt->u.assoc_req.listen_interval = 748 cpu_to_le16(local->hw.conf.listen_interval); 749 } 750 751 /* SSID */ 752 pos = skb_put(skb, 2 + assoc_data->ssid_len); 753 ie_start = pos; 754 *pos++ = WLAN_EID_SSID; 755 *pos++ = assoc_data->ssid_len; 756 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 757 758 /* add all rates which were marked to be used above */ 759 supp_rates_len = rates_len; 760 if (supp_rates_len > 8) 761 supp_rates_len = 8; 762 763 pos = skb_put(skb, supp_rates_len + 2); 764 *pos++ = WLAN_EID_SUPP_RATES; 765 *pos++ = supp_rates_len; 766 767 count = 0; 768 for (i = 0; i < sband->n_bitrates; i++) { 769 if (BIT(i) & rates) { 770 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 771 5 * (1 << shift)); 772 *pos++ = (u8) rate; 773 if (++count == 8) 774 break; 775 } 776 } 777 778 if (rates_len > count) { 779 pos = skb_put(skb, rates_len - count + 2); 780 *pos++ = WLAN_EID_EXT_SUPP_RATES; 781 *pos++ = rates_len - count; 782 783 for (i++; i < sband->n_bitrates; i++) { 784 if (BIT(i) & rates) { 785 int rate; 786 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 787 5 * (1 << shift)); 788 *pos++ = (u8) rate; 789 } 790 } 791 } 792 793 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 794 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 795 pos = skb_put(skb, 4); 796 *pos++ = WLAN_EID_PWR_CAPABILITY; 797 *pos++ = 2; 798 *pos++ = 0; /* min tx power */ 799 /* max tx power */ 800 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 801 } 802 803 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 804 /* TODO: get this in reg domain format */ 805 pos = skb_put(skb, 2 * sband->n_channels + 2); 806 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 807 *pos++ = 2 * sband->n_channels; 808 for (i = 0; i < sband->n_channels; i++) { 809 *pos++ = ieee80211_frequency_to_channel( 810 sband->channels[i].center_freq); 811 *pos++ = 1; /* one channel in the subband*/ 812 } 813 } 814 815 /* Set MBSSID support for HE AP if needed */ 816 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 817 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) { 818 struct element *elem; 819 820 /* we know it's writable, cast away the const */ 821 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 822 assoc_data->ie, 823 assoc_data->ie_len); 824 825 /* We can probably assume both always true */ 826 if (elem && elem->datalen >= 3) 827 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 828 } 829 830 /* if present, add any custom IEs that go before HT */ 831 if (assoc_data->ie_len) { 832 static const u8 before_ht[] = { 833 WLAN_EID_SSID, 834 WLAN_EID_SUPP_RATES, 835 WLAN_EID_EXT_SUPP_RATES, 836 WLAN_EID_PWR_CAPABILITY, 837 WLAN_EID_SUPPORTED_CHANNELS, 838 WLAN_EID_RSN, 839 WLAN_EID_QOS_CAPA, 840 WLAN_EID_RRM_ENABLED_CAPABILITIES, 841 WLAN_EID_MOBILITY_DOMAIN, 842 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 843 WLAN_EID_RIC_DATA, /* reassoc only */ 844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 845 }; 846 static const u8 after_ric[] = { 847 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 848 WLAN_EID_HT_CAPABILITY, 849 WLAN_EID_BSS_COEX_2040, 850 /* luckily this is almost always there */ 851 WLAN_EID_EXT_CAPABILITY, 852 WLAN_EID_QOS_TRAFFIC_CAPA, 853 WLAN_EID_TIM_BCAST_REQ, 854 WLAN_EID_INTERWORKING, 855 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 856 WLAN_EID_VHT_CAPABILITY, 857 WLAN_EID_OPMODE_NOTIF, 858 }; 859 860 noffset = ieee80211_ie_split_ric(assoc_data->ie, 861 assoc_data->ie_len, 862 before_ht, 863 ARRAY_SIZE(before_ht), 864 after_ric, 865 ARRAY_SIZE(after_ric), 866 offset); 867 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 868 offset = noffset; 869 } 870 871 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 872 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 873 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 874 875 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 876 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 877 sband, chan, sdata->smps_mode); 878 879 /* if present, add any custom IEs that go before VHT */ 880 if (assoc_data->ie_len) { 881 static const u8 before_vht[] = { 882 /* 883 * no need to list the ones split off before HT 884 * or generated here 885 */ 886 WLAN_EID_BSS_COEX_2040, 887 WLAN_EID_EXT_CAPABILITY, 888 WLAN_EID_QOS_TRAFFIC_CAPA, 889 WLAN_EID_TIM_BCAST_REQ, 890 WLAN_EID_INTERWORKING, 891 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 892 }; 893 894 /* RIC already taken above, so no need to handle here anymore */ 895 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 896 before_vht, ARRAY_SIZE(before_vht), 897 offset); 898 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 899 offset = noffset; 900 } 901 902 /* if present, add any custom IEs that go before HE */ 903 if (assoc_data->ie_len) { 904 static const u8 before_he[] = { 905 /* 906 * no need to list the ones split off before VHT 907 * or generated here 908 */ 909 WLAN_EID_OPMODE_NOTIF, 910 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 911 /* 11ai elements */ 912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 916 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 917 /* TODO: add 11ah/11aj/11ak elements */ 918 }; 919 920 /* RIC already taken above, so no need to handle here anymore */ 921 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 922 before_he, ARRAY_SIZE(before_he), 923 offset); 924 pos = skb_put(skb, noffset - offset); 925 memcpy(pos, assoc_data->ie + offset, noffset - offset); 926 offset = noffset; 927 } 928 929 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 930 ieee80211_add_vht_ie(sdata, skb, sband, 931 &assoc_data->ap_vht_cap); 932 933 /* 934 * If AP doesn't support HT, mark HE as disabled. 935 * If on the 5GHz band, make sure it supports VHT. 936 */ 937 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 938 (sband->band == NL80211_BAND_5GHZ && 939 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 940 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 941 942 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 943 ieee80211_add_he_ie(sdata, skb, sband); 944 945 /* if present, add any custom non-vendor IEs that go after HE */ 946 if (assoc_data->ie_len) { 947 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 948 assoc_data->ie_len, 949 offset); 950 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 951 offset = noffset; 952 } 953 954 if (assoc_data->wmm) { 955 if (assoc_data->uapsd) { 956 qos_info = ifmgd->uapsd_queues; 957 qos_info |= (ifmgd->uapsd_max_sp_len << 958 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 959 } else { 960 qos_info = 0; 961 } 962 963 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 964 } 965 966 /* add any remaining custom (i.e. vendor specific here) IEs */ 967 if (assoc_data->ie_len) { 968 noffset = assoc_data->ie_len; 969 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 970 } 971 972 if (assoc_data->fils_kek_len && 973 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 974 dev_kfree_skb(skb); 975 return; 976 } 977 978 pos = skb_tail_pointer(skb); 979 kfree(ifmgd->assoc_req_ies); 980 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 981 ifmgd->assoc_req_ies_len = pos - ie_start; 982 983 drv_mgd_prepare_tx(local, sdata, 0); 984 985 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 986 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 987 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 988 IEEE80211_TX_INTFL_MLME_CONN_TX; 989 ieee80211_tx_skb(sdata, skb); 990 } 991 992 void ieee80211_send_pspoll(struct ieee80211_local *local, 993 struct ieee80211_sub_if_data *sdata) 994 { 995 struct ieee80211_pspoll *pspoll; 996 struct sk_buff *skb; 997 998 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 999 if (!skb) 1000 return; 1001 1002 pspoll = (struct ieee80211_pspoll *) skb->data; 1003 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1004 1005 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1006 ieee80211_tx_skb(sdata, skb); 1007 } 1008 1009 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1010 struct ieee80211_sub_if_data *sdata, 1011 bool powersave) 1012 { 1013 struct sk_buff *skb; 1014 struct ieee80211_hdr_3addr *nullfunc; 1015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1016 1017 /* Don't send NDPs when STA is connected HE */ 1018 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1019 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1020 return; 1021 1022 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1023 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1024 if (!skb) 1025 return; 1026 1027 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1028 if (powersave) 1029 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1030 1031 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1032 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1033 1034 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1035 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1036 1037 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1038 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1039 1040 ieee80211_tx_skb(sdata, skb); 1041 } 1042 1043 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1044 struct ieee80211_sub_if_data *sdata) 1045 { 1046 struct sk_buff *skb; 1047 struct ieee80211_hdr *nullfunc; 1048 __le16 fc; 1049 1050 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1051 return; 1052 1053 /* Don't send NDPs when connected HE */ 1054 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1055 return; 1056 1057 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1058 if (!skb) 1059 return; 1060 1061 skb_reserve(skb, local->hw.extra_tx_headroom); 1062 1063 nullfunc = skb_put_zero(skb, 30); 1064 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1065 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1066 nullfunc->frame_control = fc; 1067 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1068 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1069 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1070 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1071 1072 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1073 ieee80211_tx_skb(sdata, skb); 1074 } 1075 1076 /* spectrum management related things */ 1077 static void ieee80211_chswitch_work(struct work_struct *work) 1078 { 1079 struct ieee80211_sub_if_data *sdata = 1080 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1081 struct ieee80211_local *local = sdata->local; 1082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1083 int ret; 1084 1085 if (!ieee80211_sdata_running(sdata)) 1086 return; 1087 1088 sdata_lock(sdata); 1089 mutex_lock(&local->mtx); 1090 mutex_lock(&local->chanctx_mtx); 1091 1092 if (!ifmgd->associated) 1093 goto out; 1094 1095 if (!sdata->vif.csa_active) 1096 goto out; 1097 1098 /* 1099 * using reservation isn't immediate as it may be deferred until later 1100 * with multi-vif. once reservation is complete it will re-schedule the 1101 * work with no reserved_chanctx so verify chandef to check if it 1102 * completed successfully 1103 */ 1104 1105 if (sdata->reserved_chanctx) { 1106 struct ieee80211_supported_band *sband = NULL; 1107 struct sta_info *mgd_sta = NULL; 1108 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1109 1110 /* 1111 * with multi-vif csa driver may call ieee80211_csa_finish() 1112 * many times while waiting for other interfaces to use their 1113 * reservations 1114 */ 1115 if (sdata->reserved_ready) 1116 goto out; 1117 1118 if (sdata->vif.bss_conf.chandef.width != 1119 sdata->csa_chandef.width) { 1120 /* 1121 * For managed interface, we need to also update the AP 1122 * station bandwidth and align the rate scale algorithm 1123 * on the bandwidth change. Here we only consider the 1124 * bandwidth of the new channel definition (as channel 1125 * switch flow does not have the full HT/VHT/HE 1126 * information), assuming that if additional changes are 1127 * required they would be done as part of the processing 1128 * of the next beacon from the AP. 1129 */ 1130 switch (sdata->csa_chandef.width) { 1131 case NL80211_CHAN_WIDTH_20_NOHT: 1132 case NL80211_CHAN_WIDTH_20: 1133 default: 1134 bw = IEEE80211_STA_RX_BW_20; 1135 break; 1136 case NL80211_CHAN_WIDTH_40: 1137 bw = IEEE80211_STA_RX_BW_40; 1138 break; 1139 case NL80211_CHAN_WIDTH_80: 1140 bw = IEEE80211_STA_RX_BW_80; 1141 break; 1142 case NL80211_CHAN_WIDTH_80P80: 1143 case NL80211_CHAN_WIDTH_160: 1144 bw = IEEE80211_STA_RX_BW_160; 1145 break; 1146 } 1147 1148 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1149 sband = 1150 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1151 } 1152 1153 if (sdata->vif.bss_conf.chandef.width > 1154 sdata->csa_chandef.width) { 1155 mgd_sta->sta.bandwidth = bw; 1156 rate_control_rate_update(local, sband, mgd_sta, 1157 IEEE80211_RC_BW_CHANGED); 1158 } 1159 1160 ret = ieee80211_vif_use_reserved_context(sdata); 1161 if (ret) { 1162 sdata_info(sdata, 1163 "failed to use reserved channel context, disconnecting (err=%d)\n", 1164 ret); 1165 ieee80211_queue_work(&sdata->local->hw, 1166 &ifmgd->csa_connection_drop_work); 1167 goto out; 1168 } 1169 1170 if (sdata->vif.bss_conf.chandef.width < 1171 sdata->csa_chandef.width) { 1172 mgd_sta->sta.bandwidth = bw; 1173 rate_control_rate_update(local, sband, mgd_sta, 1174 IEEE80211_RC_BW_CHANGED); 1175 } 1176 1177 goto out; 1178 } 1179 1180 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1181 &sdata->csa_chandef)) { 1182 sdata_info(sdata, 1183 "failed to finalize channel switch, disconnecting\n"); 1184 ieee80211_queue_work(&sdata->local->hw, 1185 &ifmgd->csa_connection_drop_work); 1186 goto out; 1187 } 1188 1189 ifmgd->csa_waiting_bcn = true; 1190 1191 ieee80211_sta_reset_beacon_monitor(sdata); 1192 ieee80211_sta_reset_conn_monitor(sdata); 1193 1194 out: 1195 mutex_unlock(&local->chanctx_mtx); 1196 mutex_unlock(&local->mtx); 1197 sdata_unlock(sdata); 1198 } 1199 1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1201 { 1202 struct ieee80211_local *local = sdata->local; 1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1204 int ret; 1205 1206 sdata_assert_lock(sdata); 1207 1208 WARN_ON(!sdata->vif.csa_active); 1209 1210 if (sdata->csa_block_tx) { 1211 ieee80211_wake_vif_queues(local, sdata, 1212 IEEE80211_QUEUE_STOP_REASON_CSA); 1213 sdata->csa_block_tx = false; 1214 } 1215 1216 sdata->vif.csa_active = false; 1217 ifmgd->csa_waiting_bcn = false; 1218 1219 ret = drv_post_channel_switch(sdata); 1220 if (ret) { 1221 sdata_info(sdata, 1222 "driver post channel switch failed, disconnecting\n"); 1223 ieee80211_queue_work(&local->hw, 1224 &ifmgd->csa_connection_drop_work); 1225 return; 1226 } 1227 1228 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1229 } 1230 1231 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1232 { 1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1235 1236 trace_api_chswitch_done(sdata, success); 1237 if (!success) { 1238 sdata_info(sdata, 1239 "driver channel switch failed, disconnecting\n"); 1240 ieee80211_queue_work(&sdata->local->hw, 1241 &ifmgd->csa_connection_drop_work); 1242 } else { 1243 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1244 } 1245 } 1246 EXPORT_SYMBOL(ieee80211_chswitch_done); 1247 1248 static void ieee80211_chswitch_timer(struct timer_list *t) 1249 { 1250 struct ieee80211_sub_if_data *sdata = 1251 from_timer(sdata, t, u.mgd.chswitch_timer); 1252 1253 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1254 } 1255 1256 static void 1257 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1258 { 1259 struct ieee80211_local *local = sdata->local; 1260 1261 if (!local->ops->abort_channel_switch) 1262 return; 1263 1264 mutex_lock(&local->mtx); 1265 1266 mutex_lock(&local->chanctx_mtx); 1267 ieee80211_vif_unreserve_chanctx(sdata); 1268 mutex_unlock(&local->chanctx_mtx); 1269 1270 if (sdata->csa_block_tx) 1271 ieee80211_wake_vif_queues(local, sdata, 1272 IEEE80211_QUEUE_STOP_REASON_CSA); 1273 1274 sdata->csa_block_tx = false; 1275 sdata->vif.csa_active = false; 1276 1277 mutex_unlock(&local->mtx); 1278 1279 drv_abort_channel_switch(sdata); 1280 } 1281 1282 static void 1283 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1284 u64 timestamp, u32 device_timestamp, 1285 struct ieee802_11_elems *elems, 1286 bool beacon) 1287 { 1288 struct ieee80211_local *local = sdata->local; 1289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1290 struct cfg80211_bss *cbss = ifmgd->associated; 1291 struct ieee80211_chanctx_conf *conf; 1292 struct ieee80211_chanctx *chanctx; 1293 enum nl80211_band current_band; 1294 struct ieee80211_csa_ie csa_ie; 1295 struct ieee80211_channel_switch ch_switch; 1296 int res; 1297 1298 sdata_assert_lock(sdata); 1299 1300 if (!cbss) 1301 return; 1302 1303 if (local->scanning) 1304 return; 1305 1306 current_band = cbss->channel->band; 1307 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1308 ifmgd->flags, 1309 ifmgd->associated->bssid, &csa_ie); 1310 1311 if (!res) { 1312 ch_switch.timestamp = timestamp; 1313 ch_switch.device_timestamp = device_timestamp; 1314 ch_switch.block_tx = beacon ? csa_ie.mode : 0; 1315 ch_switch.chandef = csa_ie.chandef; 1316 ch_switch.count = csa_ie.count; 1317 ch_switch.delay = csa_ie.max_switch_time; 1318 } 1319 1320 if (res < 0) { 1321 ieee80211_queue_work(&local->hw, 1322 &ifmgd->csa_connection_drop_work); 1323 return; 1324 } 1325 1326 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1327 if (res) 1328 ieee80211_sta_abort_chanswitch(sdata); 1329 else 1330 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1331 return; 1332 } else if (sdata->vif.csa_active || res) { 1333 /* disregard subsequent announcements if already processing */ 1334 return; 1335 } 1336 1337 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1338 IEEE80211_CHAN_DISABLED)) { 1339 sdata_info(sdata, 1340 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1341 ifmgd->associated->bssid, 1342 csa_ie.chandef.chan->center_freq, 1343 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1344 csa_ie.chandef.center_freq2); 1345 ieee80211_queue_work(&local->hw, 1346 &ifmgd->csa_connection_drop_work); 1347 return; 1348 } 1349 1350 if (cfg80211_chandef_identical(&csa_ie.chandef, 1351 &sdata->vif.bss_conf.chandef) && 1352 (!csa_ie.mode || !beacon)) { 1353 if (ifmgd->csa_ignored_same_chan) 1354 return; 1355 sdata_info(sdata, 1356 "AP %pM tries to chanswitch to same channel, ignore\n", 1357 ifmgd->associated->bssid); 1358 ifmgd->csa_ignored_same_chan = true; 1359 return; 1360 } 1361 1362 /* 1363 * Drop all TDLS peers - either we disconnect or move to a different 1364 * channel from this point on. There's no telling what our peer will do. 1365 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1366 * have an incompatible wider chandef. 1367 */ 1368 ieee80211_teardown_tdls_peers(sdata); 1369 1370 mutex_lock(&local->mtx); 1371 mutex_lock(&local->chanctx_mtx); 1372 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1373 lockdep_is_held(&local->chanctx_mtx)); 1374 if (!conf) { 1375 sdata_info(sdata, 1376 "no channel context assigned to vif?, disconnecting\n"); 1377 goto drop_connection; 1378 } 1379 1380 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1381 1382 if (local->use_chanctx && 1383 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1384 sdata_info(sdata, 1385 "driver doesn't support chan-switch with channel contexts\n"); 1386 goto drop_connection; 1387 } 1388 1389 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1390 sdata_info(sdata, 1391 "preparing for channel switch failed, disconnecting\n"); 1392 goto drop_connection; 1393 } 1394 1395 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1396 chanctx->mode, false); 1397 if (res) { 1398 sdata_info(sdata, 1399 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1400 res); 1401 goto drop_connection; 1402 } 1403 mutex_unlock(&local->chanctx_mtx); 1404 1405 sdata->vif.csa_active = true; 1406 sdata->csa_chandef = csa_ie.chandef; 1407 sdata->csa_block_tx = ch_switch.block_tx; 1408 ifmgd->csa_ignored_same_chan = false; 1409 1410 if (sdata->csa_block_tx) 1411 ieee80211_stop_vif_queues(local, sdata, 1412 IEEE80211_QUEUE_STOP_REASON_CSA); 1413 mutex_unlock(&local->mtx); 1414 1415 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1416 csa_ie.count); 1417 1418 if (local->ops->channel_switch) { 1419 /* use driver's channel switch callback */ 1420 drv_channel_switch(local, sdata, &ch_switch); 1421 return; 1422 } 1423 1424 /* channel switch handled in software */ 1425 if (csa_ie.count <= 1) 1426 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1427 else 1428 mod_timer(&ifmgd->chswitch_timer, 1429 TU_TO_EXP_TIME((csa_ie.count - 1) * 1430 cbss->beacon_interval)); 1431 return; 1432 drop_connection: 1433 /* 1434 * This is just so that the disconnect flow will know that 1435 * we were trying to switch channel and failed. In case the 1436 * mode is 1 (we are not allowed to Tx), we will know not to 1437 * send a deauthentication frame. Those two fields will be 1438 * reset when the disconnection worker runs. 1439 */ 1440 sdata->vif.csa_active = true; 1441 sdata->csa_block_tx = ch_switch.block_tx; 1442 1443 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1444 mutex_unlock(&local->chanctx_mtx); 1445 mutex_unlock(&local->mtx); 1446 } 1447 1448 static bool 1449 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1450 struct ieee80211_channel *channel, 1451 const u8 *country_ie, u8 country_ie_len, 1452 const u8 *pwr_constr_elem, 1453 int *chan_pwr, int *pwr_reduction) 1454 { 1455 struct ieee80211_country_ie_triplet *triplet; 1456 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1457 int i, chan_increment; 1458 bool have_chan_pwr = false; 1459 1460 /* Invalid IE */ 1461 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1462 return false; 1463 1464 triplet = (void *)(country_ie + 3); 1465 country_ie_len -= 3; 1466 1467 switch (channel->band) { 1468 default: 1469 WARN_ON_ONCE(1); 1470 /* fall through */ 1471 case NL80211_BAND_2GHZ: 1472 case NL80211_BAND_60GHZ: 1473 chan_increment = 1; 1474 break; 1475 case NL80211_BAND_5GHZ: 1476 chan_increment = 4; 1477 break; 1478 } 1479 1480 /* find channel */ 1481 while (country_ie_len >= 3) { 1482 u8 first_channel = triplet->chans.first_channel; 1483 1484 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1485 goto next; 1486 1487 for (i = 0; i < triplet->chans.num_channels; i++) { 1488 if (first_channel + i * chan_increment == chan) { 1489 have_chan_pwr = true; 1490 *chan_pwr = triplet->chans.max_power; 1491 break; 1492 } 1493 } 1494 if (have_chan_pwr) 1495 break; 1496 1497 next: 1498 triplet++; 1499 country_ie_len -= 3; 1500 } 1501 1502 if (have_chan_pwr && pwr_constr_elem) 1503 *pwr_reduction = *pwr_constr_elem; 1504 else 1505 *pwr_reduction = 0; 1506 1507 return have_chan_pwr; 1508 } 1509 1510 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1511 struct ieee80211_channel *channel, 1512 const u8 *cisco_dtpc_ie, 1513 int *pwr_level) 1514 { 1515 /* From practical testing, the first data byte of the DTPC element 1516 * seems to contain the requested dBm level, and the CLI on Cisco 1517 * APs clearly state the range is -127 to 127 dBm, which indicates 1518 * a signed byte, although it seemingly never actually goes negative. 1519 * The other byte seems to always be zero. 1520 */ 1521 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1522 } 1523 1524 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1525 struct ieee80211_channel *channel, 1526 struct ieee80211_mgmt *mgmt, 1527 const u8 *country_ie, u8 country_ie_len, 1528 const u8 *pwr_constr_ie, 1529 const u8 *cisco_dtpc_ie) 1530 { 1531 bool has_80211h_pwr = false, has_cisco_pwr = false; 1532 int chan_pwr = 0, pwr_reduction_80211h = 0; 1533 int pwr_level_cisco, pwr_level_80211h; 1534 int new_ap_level; 1535 __le16 capab = mgmt->u.probe_resp.capab_info; 1536 1537 if (country_ie && 1538 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1539 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1540 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1541 sdata, channel, country_ie, country_ie_len, 1542 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1543 pwr_level_80211h = 1544 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1545 } 1546 1547 if (cisco_dtpc_ie) { 1548 ieee80211_find_cisco_dtpc( 1549 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1550 has_cisco_pwr = true; 1551 } 1552 1553 if (!has_80211h_pwr && !has_cisco_pwr) 1554 return 0; 1555 1556 /* If we have both 802.11h and Cisco DTPC, apply both limits 1557 * by picking the smallest of the two power levels advertised. 1558 */ 1559 if (has_80211h_pwr && 1560 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1561 new_ap_level = pwr_level_80211h; 1562 1563 if (sdata->ap_power_level == new_ap_level) 1564 return 0; 1565 1566 sdata_dbg(sdata, 1567 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1568 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1569 sdata->u.mgd.bssid); 1570 } else { /* has_cisco_pwr is always true here. */ 1571 new_ap_level = pwr_level_cisco; 1572 1573 if (sdata->ap_power_level == new_ap_level) 1574 return 0; 1575 1576 sdata_dbg(sdata, 1577 "Limiting TX power to %d dBm as advertised by %pM\n", 1578 pwr_level_cisco, sdata->u.mgd.bssid); 1579 } 1580 1581 sdata->ap_power_level = new_ap_level; 1582 if (__ieee80211_recalc_txpower(sdata)) 1583 return BSS_CHANGED_TXPOWER; 1584 return 0; 1585 } 1586 1587 /* powersave */ 1588 static void ieee80211_enable_ps(struct ieee80211_local *local, 1589 struct ieee80211_sub_if_data *sdata) 1590 { 1591 struct ieee80211_conf *conf = &local->hw.conf; 1592 1593 /* 1594 * If we are scanning right now then the parameters will 1595 * take effect when scan finishes. 1596 */ 1597 if (local->scanning) 1598 return; 1599 1600 if (conf->dynamic_ps_timeout > 0 && 1601 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1602 mod_timer(&local->dynamic_ps_timer, jiffies + 1603 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1604 } else { 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1606 ieee80211_send_nullfunc(local, sdata, true); 1607 1608 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1609 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1610 return; 1611 1612 conf->flags |= IEEE80211_CONF_PS; 1613 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1614 } 1615 } 1616 1617 static void ieee80211_change_ps(struct ieee80211_local *local) 1618 { 1619 struct ieee80211_conf *conf = &local->hw.conf; 1620 1621 if (local->ps_sdata) { 1622 ieee80211_enable_ps(local, local->ps_sdata); 1623 } else if (conf->flags & IEEE80211_CONF_PS) { 1624 conf->flags &= ~IEEE80211_CONF_PS; 1625 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1626 del_timer_sync(&local->dynamic_ps_timer); 1627 cancel_work_sync(&local->dynamic_ps_enable_work); 1628 } 1629 } 1630 1631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1632 { 1633 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1634 struct sta_info *sta = NULL; 1635 bool authorized = false; 1636 1637 if (!mgd->powersave) 1638 return false; 1639 1640 if (mgd->broken_ap) 1641 return false; 1642 1643 if (!mgd->associated) 1644 return false; 1645 1646 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1647 return false; 1648 1649 if (!mgd->have_beacon) 1650 return false; 1651 1652 rcu_read_lock(); 1653 sta = sta_info_get(sdata, mgd->bssid); 1654 if (sta) 1655 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1656 rcu_read_unlock(); 1657 1658 return authorized; 1659 } 1660 1661 /* need to hold RTNL or interface lock */ 1662 void ieee80211_recalc_ps(struct ieee80211_local *local) 1663 { 1664 struct ieee80211_sub_if_data *sdata, *found = NULL; 1665 int count = 0; 1666 int timeout; 1667 1668 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1669 local->ps_sdata = NULL; 1670 return; 1671 } 1672 1673 list_for_each_entry(sdata, &local->interfaces, list) { 1674 if (!ieee80211_sdata_running(sdata)) 1675 continue; 1676 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1677 /* If an AP vif is found, then disable PS 1678 * by setting the count to zero thereby setting 1679 * ps_sdata to NULL. 1680 */ 1681 count = 0; 1682 break; 1683 } 1684 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1685 continue; 1686 found = sdata; 1687 count++; 1688 } 1689 1690 if (count == 1 && ieee80211_powersave_allowed(found)) { 1691 u8 dtimper = found->u.mgd.dtim_period; 1692 1693 timeout = local->dynamic_ps_forced_timeout; 1694 if (timeout < 0) 1695 timeout = 100; 1696 local->hw.conf.dynamic_ps_timeout = timeout; 1697 1698 /* If the TIM IE is invalid, pretend the value is 1 */ 1699 if (!dtimper) 1700 dtimper = 1; 1701 1702 local->hw.conf.ps_dtim_period = dtimper; 1703 local->ps_sdata = found; 1704 } else { 1705 local->ps_sdata = NULL; 1706 } 1707 1708 ieee80211_change_ps(local); 1709 } 1710 1711 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1712 { 1713 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1714 1715 if (sdata->vif.bss_conf.ps != ps_allowed) { 1716 sdata->vif.bss_conf.ps = ps_allowed; 1717 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1718 } 1719 } 1720 1721 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1722 { 1723 struct ieee80211_local *local = 1724 container_of(work, struct ieee80211_local, 1725 dynamic_ps_disable_work); 1726 1727 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1728 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1729 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1730 } 1731 1732 ieee80211_wake_queues_by_reason(&local->hw, 1733 IEEE80211_MAX_QUEUE_MAP, 1734 IEEE80211_QUEUE_STOP_REASON_PS, 1735 false); 1736 } 1737 1738 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1739 { 1740 struct ieee80211_local *local = 1741 container_of(work, struct ieee80211_local, 1742 dynamic_ps_enable_work); 1743 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1744 struct ieee80211_if_managed *ifmgd; 1745 unsigned long flags; 1746 int q; 1747 1748 /* can only happen when PS was just disabled anyway */ 1749 if (!sdata) 1750 return; 1751 1752 ifmgd = &sdata->u.mgd; 1753 1754 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1755 return; 1756 1757 if (local->hw.conf.dynamic_ps_timeout > 0) { 1758 /* don't enter PS if TX frames are pending */ 1759 if (drv_tx_frames_pending(local)) { 1760 mod_timer(&local->dynamic_ps_timer, jiffies + 1761 msecs_to_jiffies( 1762 local->hw.conf.dynamic_ps_timeout)); 1763 return; 1764 } 1765 1766 /* 1767 * transmission can be stopped by others which leads to 1768 * dynamic_ps_timer expiry. Postpone the ps timer if it 1769 * is not the actual idle state. 1770 */ 1771 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1772 for (q = 0; q < local->hw.queues; q++) { 1773 if (local->queue_stop_reasons[q]) { 1774 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1775 flags); 1776 mod_timer(&local->dynamic_ps_timer, jiffies + 1777 msecs_to_jiffies( 1778 local->hw.conf.dynamic_ps_timeout)); 1779 return; 1780 } 1781 } 1782 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1783 } 1784 1785 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1786 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1787 if (drv_tx_frames_pending(local)) { 1788 mod_timer(&local->dynamic_ps_timer, jiffies + 1789 msecs_to_jiffies( 1790 local->hw.conf.dynamic_ps_timeout)); 1791 } else { 1792 ieee80211_send_nullfunc(local, sdata, true); 1793 /* Flush to get the tx status of nullfunc frame */ 1794 ieee80211_flush_queues(local, sdata, false); 1795 } 1796 } 1797 1798 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1799 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1800 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1801 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1802 local->hw.conf.flags |= IEEE80211_CONF_PS; 1803 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1804 } 1805 } 1806 1807 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1808 { 1809 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1810 1811 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1812 } 1813 1814 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1815 { 1816 struct delayed_work *delayed_work = to_delayed_work(work); 1817 struct ieee80211_sub_if_data *sdata = 1818 container_of(delayed_work, struct ieee80211_sub_if_data, 1819 dfs_cac_timer_work); 1820 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1821 1822 mutex_lock(&sdata->local->mtx); 1823 if (sdata->wdev.cac_started) { 1824 ieee80211_vif_release_channel(sdata); 1825 cfg80211_cac_event(sdata->dev, &chandef, 1826 NL80211_RADAR_CAC_FINISHED, 1827 GFP_KERNEL); 1828 } 1829 mutex_unlock(&sdata->local->mtx); 1830 } 1831 1832 static bool 1833 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1834 { 1835 struct ieee80211_local *local = sdata->local; 1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1837 bool ret = false; 1838 int ac; 1839 1840 if (local->hw.queues < IEEE80211_NUM_ACS) 1841 return false; 1842 1843 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1844 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1845 int non_acm_ac; 1846 unsigned long now = jiffies; 1847 1848 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1849 tx_tspec->admitted_time && 1850 time_after(now, tx_tspec->time_slice_start + HZ)) { 1851 tx_tspec->consumed_tx_time = 0; 1852 tx_tspec->time_slice_start = now; 1853 1854 if (tx_tspec->downgraded) 1855 tx_tspec->action = 1856 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1857 } 1858 1859 switch (tx_tspec->action) { 1860 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1861 /* take the original parameters */ 1862 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1863 sdata_err(sdata, 1864 "failed to set TX queue parameters for queue %d\n", 1865 ac); 1866 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1867 tx_tspec->downgraded = false; 1868 ret = true; 1869 break; 1870 case TX_TSPEC_ACTION_DOWNGRADE: 1871 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1872 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1873 ret = true; 1874 break; 1875 } 1876 /* downgrade next lower non-ACM AC */ 1877 for (non_acm_ac = ac + 1; 1878 non_acm_ac < IEEE80211_NUM_ACS; 1879 non_acm_ac++) 1880 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1881 break; 1882 /* Usually the loop will result in using BK even if it 1883 * requires admission control, but such a configuration 1884 * makes no sense and we have to transmit somehow - the 1885 * AC selection does the same thing. 1886 * If we started out trying to downgrade from BK, then 1887 * the extra condition here might be needed. 1888 */ 1889 if (non_acm_ac >= IEEE80211_NUM_ACS) 1890 non_acm_ac = IEEE80211_AC_BK; 1891 if (drv_conf_tx(local, sdata, ac, 1892 &sdata->tx_conf[non_acm_ac])) 1893 sdata_err(sdata, 1894 "failed to set TX queue parameters for queue %d\n", 1895 ac); 1896 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1897 ret = true; 1898 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1899 tx_tspec->time_slice_start + HZ - now + 1); 1900 break; 1901 case TX_TSPEC_ACTION_NONE: 1902 /* nothing now */ 1903 break; 1904 } 1905 } 1906 1907 return ret; 1908 } 1909 1910 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1911 { 1912 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1913 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1914 } 1915 1916 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1917 { 1918 struct ieee80211_sub_if_data *sdata; 1919 1920 sdata = container_of(work, struct ieee80211_sub_if_data, 1921 u.mgd.tx_tspec_wk.work); 1922 ieee80211_sta_handle_tspec_ac_params(sdata); 1923 } 1924 1925 /* MLME */ 1926 static bool 1927 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1928 struct ieee80211_sub_if_data *sdata, 1929 const u8 *wmm_param, size_t wmm_param_len, 1930 const struct ieee80211_mu_edca_param_set *mu_edca) 1931 { 1932 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1934 size_t left; 1935 int count, mu_edca_count, ac; 1936 const u8 *pos; 1937 u8 uapsd_queues = 0; 1938 1939 if (!local->ops->conf_tx) 1940 return false; 1941 1942 if (local->hw.queues < IEEE80211_NUM_ACS) 1943 return false; 1944 1945 if (!wmm_param) 1946 return false; 1947 1948 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1949 return false; 1950 1951 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1952 uapsd_queues = ifmgd->uapsd_queues; 1953 1954 count = wmm_param[6] & 0x0f; 1955 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1956 * if mu_edca was preset before and now it disappeared tell 1957 * the driver about it. 1958 */ 1959 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1960 if (count == ifmgd->wmm_last_param_set && 1961 mu_edca_count == ifmgd->mu_edca_last_param_set) 1962 return false; 1963 ifmgd->wmm_last_param_set = count; 1964 ifmgd->mu_edca_last_param_set = mu_edca_count; 1965 1966 pos = wmm_param + 8; 1967 left = wmm_param_len - 8; 1968 1969 memset(¶ms, 0, sizeof(params)); 1970 1971 sdata->wmm_acm = 0; 1972 for (; left >= 4; left -= 4, pos += 4) { 1973 int aci = (pos[0] >> 5) & 0x03; 1974 int acm = (pos[0] >> 4) & 0x01; 1975 bool uapsd = false; 1976 1977 switch (aci) { 1978 case 1: /* AC_BK */ 1979 ac = IEEE80211_AC_BK; 1980 if (acm) 1981 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1982 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1983 uapsd = true; 1984 params[ac].mu_edca = !!mu_edca; 1985 if (mu_edca) 1986 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1987 break; 1988 case 2: /* AC_VI */ 1989 ac = IEEE80211_AC_VI; 1990 if (acm) 1991 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1992 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1993 uapsd = true; 1994 params[ac].mu_edca = !!mu_edca; 1995 if (mu_edca) 1996 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1997 break; 1998 case 3: /* AC_VO */ 1999 ac = IEEE80211_AC_VO; 2000 if (acm) 2001 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2002 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2003 uapsd = true; 2004 params[ac].mu_edca = !!mu_edca; 2005 if (mu_edca) 2006 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2007 break; 2008 case 0: /* AC_BE */ 2009 default: 2010 ac = IEEE80211_AC_BE; 2011 if (acm) 2012 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2013 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2014 uapsd = true; 2015 params[ac].mu_edca = !!mu_edca; 2016 if (mu_edca) 2017 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2018 break; 2019 } 2020 2021 params[ac].aifs = pos[0] & 0x0f; 2022 2023 if (params[ac].aifs < 2) { 2024 sdata_info(sdata, 2025 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2026 params[ac].aifs, aci); 2027 params[ac].aifs = 2; 2028 } 2029 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2030 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2031 params[ac].txop = get_unaligned_le16(pos + 2); 2032 params[ac].acm = acm; 2033 params[ac].uapsd = uapsd; 2034 2035 if (params[ac].cw_min == 0 || 2036 params[ac].cw_min > params[ac].cw_max) { 2037 sdata_info(sdata, 2038 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2039 params[ac].cw_min, params[ac].cw_max, aci); 2040 return false; 2041 } 2042 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2043 } 2044 2045 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2046 mlme_dbg(sdata, 2047 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2048 ac, params[ac].acm, 2049 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2050 params[ac].txop, params[ac].uapsd, 2051 ifmgd->tx_tspec[ac].downgraded); 2052 sdata->tx_conf[ac] = params[ac]; 2053 if (!ifmgd->tx_tspec[ac].downgraded && 2054 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2055 sdata_err(sdata, 2056 "failed to set TX queue parameters for AC %d\n", 2057 ac); 2058 } 2059 2060 /* enable WMM or activate new settings */ 2061 sdata->vif.bss_conf.qos = true; 2062 return true; 2063 } 2064 2065 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2066 { 2067 lockdep_assert_held(&sdata->local->mtx); 2068 2069 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2070 ieee80211_run_deferred_scan(sdata->local); 2071 } 2072 2073 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2074 { 2075 mutex_lock(&sdata->local->mtx); 2076 __ieee80211_stop_poll(sdata); 2077 mutex_unlock(&sdata->local->mtx); 2078 } 2079 2080 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2081 u16 capab, bool erp_valid, u8 erp) 2082 { 2083 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2084 struct ieee80211_supported_band *sband; 2085 u32 changed = 0; 2086 bool use_protection; 2087 bool use_short_preamble; 2088 bool use_short_slot; 2089 2090 sband = ieee80211_get_sband(sdata); 2091 if (!sband) 2092 return changed; 2093 2094 if (erp_valid) { 2095 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2096 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2097 } else { 2098 use_protection = false; 2099 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2100 } 2101 2102 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2103 if (sband->band == NL80211_BAND_5GHZ) 2104 use_short_slot = true; 2105 2106 if (use_protection != bss_conf->use_cts_prot) { 2107 bss_conf->use_cts_prot = use_protection; 2108 changed |= BSS_CHANGED_ERP_CTS_PROT; 2109 } 2110 2111 if (use_short_preamble != bss_conf->use_short_preamble) { 2112 bss_conf->use_short_preamble = use_short_preamble; 2113 changed |= BSS_CHANGED_ERP_PREAMBLE; 2114 } 2115 2116 if (use_short_slot != bss_conf->use_short_slot) { 2117 bss_conf->use_short_slot = use_short_slot; 2118 changed |= BSS_CHANGED_ERP_SLOT; 2119 } 2120 2121 return changed; 2122 } 2123 2124 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2125 struct cfg80211_bss *cbss, 2126 u32 bss_info_changed) 2127 { 2128 struct ieee80211_bss *bss = (void *)cbss->priv; 2129 struct ieee80211_local *local = sdata->local; 2130 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2131 2132 bss_info_changed |= BSS_CHANGED_ASSOC; 2133 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2134 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2135 2136 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2137 beacon_loss_count * bss_conf->beacon_int)); 2138 2139 sdata->u.mgd.associated = cbss; 2140 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2141 2142 ieee80211_check_rate_mask(sdata); 2143 2144 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2145 2146 if (sdata->vif.p2p || 2147 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2148 const struct cfg80211_bss_ies *ies; 2149 2150 rcu_read_lock(); 2151 ies = rcu_dereference(cbss->ies); 2152 if (ies) { 2153 int ret; 2154 2155 ret = cfg80211_get_p2p_attr( 2156 ies->data, ies->len, 2157 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2158 (u8 *) &bss_conf->p2p_noa_attr, 2159 sizeof(bss_conf->p2p_noa_attr)); 2160 if (ret >= 2) { 2161 sdata->u.mgd.p2p_noa_index = 2162 bss_conf->p2p_noa_attr.index; 2163 bss_info_changed |= BSS_CHANGED_P2P_PS; 2164 } 2165 } 2166 rcu_read_unlock(); 2167 } 2168 2169 /* just to be sure */ 2170 ieee80211_stop_poll(sdata); 2171 2172 ieee80211_led_assoc(local, 1); 2173 2174 if (sdata->u.mgd.have_beacon) { 2175 /* 2176 * If the AP is buggy we may get here with no DTIM period 2177 * known, so assume it's 1 which is the only safe assumption 2178 * in that case, although if the TIM IE is broken powersave 2179 * probably just won't work at all. 2180 */ 2181 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2182 bss_conf->beacon_rate = bss->beacon_rate; 2183 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2184 } else { 2185 bss_conf->beacon_rate = NULL; 2186 bss_conf->dtim_period = 0; 2187 } 2188 2189 bss_conf->assoc = 1; 2190 2191 /* Tell the driver to monitor connection quality (if supported) */ 2192 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2193 bss_conf->cqm_rssi_thold) 2194 bss_info_changed |= BSS_CHANGED_CQM; 2195 2196 /* Enable ARP filtering */ 2197 if (bss_conf->arp_addr_cnt) 2198 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2199 2200 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2201 2202 mutex_lock(&local->iflist_mtx); 2203 ieee80211_recalc_ps(local); 2204 mutex_unlock(&local->iflist_mtx); 2205 2206 ieee80211_recalc_smps(sdata); 2207 ieee80211_recalc_ps_vif(sdata); 2208 2209 netif_carrier_on(sdata->dev); 2210 } 2211 2212 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2213 u16 stype, u16 reason, bool tx, 2214 u8 *frame_buf) 2215 { 2216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2217 struct ieee80211_local *local = sdata->local; 2218 u32 changed = 0; 2219 2220 sdata_assert_lock(sdata); 2221 2222 if (WARN_ON_ONCE(tx && !frame_buf)) 2223 return; 2224 2225 if (WARN_ON(!ifmgd->associated)) 2226 return; 2227 2228 ieee80211_stop_poll(sdata); 2229 2230 ifmgd->associated = NULL; 2231 netif_carrier_off(sdata->dev); 2232 2233 /* 2234 * if we want to get out of ps before disassoc (why?) we have 2235 * to do it before sending disassoc, as otherwise the null-packet 2236 * won't be valid. 2237 */ 2238 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2239 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2240 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2241 } 2242 local->ps_sdata = NULL; 2243 2244 /* disable per-vif ps */ 2245 ieee80211_recalc_ps_vif(sdata); 2246 2247 /* make sure ongoing transmission finishes */ 2248 synchronize_net(); 2249 2250 /* 2251 * drop any frame before deauth/disassoc, this can be data or 2252 * management frame. Since we are disconnecting, we should not 2253 * insist sending these frames which can take time and delay 2254 * the disconnection and possible the roaming. 2255 */ 2256 if (tx) 2257 ieee80211_flush_queues(local, sdata, true); 2258 2259 /* deauthenticate/disassociate now */ 2260 if (tx || frame_buf) { 2261 /* 2262 * In multi channel scenarios guarantee that the virtual 2263 * interface is granted immediate airtime to transmit the 2264 * deauthentication frame by calling mgd_prepare_tx, if the 2265 * driver requested so. 2266 */ 2267 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2268 !ifmgd->have_beacon) 2269 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2270 2271 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2272 reason, tx, frame_buf); 2273 } 2274 2275 /* flush out frame - make sure the deauth was actually sent */ 2276 if (tx) 2277 ieee80211_flush_queues(local, sdata, false); 2278 2279 /* clear bssid only after building the needed mgmt frames */ 2280 eth_zero_addr(ifmgd->bssid); 2281 2282 /* remove AP and TDLS peers */ 2283 sta_info_flush(sdata); 2284 2285 /* finally reset all BSS / config parameters */ 2286 changed |= ieee80211_reset_erp_info(sdata); 2287 2288 ieee80211_led_assoc(local, 0); 2289 changed |= BSS_CHANGED_ASSOC; 2290 sdata->vif.bss_conf.assoc = false; 2291 2292 ifmgd->p2p_noa_index = -1; 2293 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2294 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2295 2296 /* on the next assoc, re-program HT/VHT parameters */ 2297 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2298 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2299 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2300 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2301 2302 /* reset MU-MIMO ownership and group data */ 2303 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2304 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2305 memset(sdata->vif.bss_conf.mu_group.position, 0, 2306 sizeof(sdata->vif.bss_conf.mu_group.position)); 2307 changed |= BSS_CHANGED_MU_GROUPS; 2308 sdata->vif.mu_mimo_owner = false; 2309 2310 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2311 2312 del_timer_sync(&local->dynamic_ps_timer); 2313 cancel_work_sync(&local->dynamic_ps_enable_work); 2314 2315 /* Disable ARP filtering */ 2316 if (sdata->vif.bss_conf.arp_addr_cnt) 2317 changed |= BSS_CHANGED_ARP_FILTER; 2318 2319 sdata->vif.bss_conf.qos = false; 2320 changed |= BSS_CHANGED_QOS; 2321 2322 /* The BSSID (not really interesting) and HT changed */ 2323 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2324 ieee80211_bss_info_change_notify(sdata, changed); 2325 2326 /* disassociated - set to defaults now */ 2327 ieee80211_set_wmm_default(sdata, false, false); 2328 2329 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2330 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2331 del_timer_sync(&sdata->u.mgd.timer); 2332 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2333 2334 sdata->vif.bss_conf.dtim_period = 0; 2335 sdata->vif.bss_conf.beacon_rate = NULL; 2336 2337 ifmgd->have_beacon = false; 2338 2339 ifmgd->flags = 0; 2340 mutex_lock(&local->mtx); 2341 ieee80211_vif_release_channel(sdata); 2342 2343 sdata->vif.csa_active = false; 2344 ifmgd->csa_waiting_bcn = false; 2345 ifmgd->csa_ignored_same_chan = false; 2346 if (sdata->csa_block_tx) { 2347 ieee80211_wake_vif_queues(local, sdata, 2348 IEEE80211_QUEUE_STOP_REASON_CSA); 2349 sdata->csa_block_tx = false; 2350 } 2351 mutex_unlock(&local->mtx); 2352 2353 /* existing TX TSPEC sessions no longer exist */ 2354 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2355 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2356 2357 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2358 } 2359 2360 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2361 struct ieee80211_hdr *hdr) 2362 { 2363 /* 2364 * We can postpone the mgd.timer whenever receiving unicast frames 2365 * from AP because we know that the connection is working both ways 2366 * at that time. But multicast frames (and hence also beacons) must 2367 * be ignored here, because we need to trigger the timer during 2368 * data idle periods for sending the periodic probe request to the 2369 * AP we're connected to. 2370 */ 2371 if (is_multicast_ether_addr(hdr->addr1)) 2372 return; 2373 2374 ieee80211_sta_reset_conn_monitor(sdata); 2375 } 2376 2377 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2378 { 2379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2380 struct ieee80211_local *local = sdata->local; 2381 2382 mutex_lock(&local->mtx); 2383 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2384 goto out; 2385 2386 __ieee80211_stop_poll(sdata); 2387 2388 mutex_lock(&local->iflist_mtx); 2389 ieee80211_recalc_ps(local); 2390 mutex_unlock(&local->iflist_mtx); 2391 2392 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2393 goto out; 2394 2395 /* 2396 * We've received a probe response, but are not sure whether 2397 * we have or will be receiving any beacons or data, so let's 2398 * schedule the timers again, just in case. 2399 */ 2400 ieee80211_sta_reset_beacon_monitor(sdata); 2401 2402 mod_timer(&ifmgd->conn_mon_timer, 2403 round_jiffies_up(jiffies + 2404 IEEE80211_CONNECTION_IDLE_TIME)); 2405 out: 2406 mutex_unlock(&local->mtx); 2407 } 2408 2409 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2410 struct ieee80211_hdr *hdr, 2411 u16 tx_time) 2412 { 2413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2414 u16 tid = ieee80211_get_tid(hdr); 2415 int ac = ieee80211_ac_from_tid(tid); 2416 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2417 unsigned long now = jiffies; 2418 2419 if (likely(!tx_tspec->admitted_time)) 2420 return; 2421 2422 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2423 tx_tspec->consumed_tx_time = 0; 2424 tx_tspec->time_slice_start = now; 2425 2426 if (tx_tspec->downgraded) { 2427 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2428 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2429 } 2430 } 2431 2432 if (tx_tspec->downgraded) 2433 return; 2434 2435 tx_tspec->consumed_tx_time += tx_time; 2436 2437 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2438 tx_tspec->downgraded = true; 2439 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2440 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2441 } 2442 } 2443 2444 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2445 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2446 { 2447 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2448 2449 if (!ieee80211_is_data(hdr->frame_control)) 2450 return; 2451 2452 if (ieee80211_is_nullfunc(hdr->frame_control) && 2453 sdata->u.mgd.probe_send_count > 0) { 2454 if (ack) 2455 ieee80211_sta_reset_conn_monitor(sdata); 2456 else 2457 sdata->u.mgd.nullfunc_failed = true; 2458 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2459 return; 2460 } 2461 2462 if (ack) 2463 ieee80211_sta_reset_conn_monitor(sdata); 2464 } 2465 2466 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2467 const u8 *src, const u8 *dst, 2468 const u8 *ssid, size_t ssid_len, 2469 struct ieee80211_channel *channel) 2470 { 2471 struct sk_buff *skb; 2472 2473 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2474 ssid, ssid_len, NULL, 0, 2475 IEEE80211_PROBE_FLAG_DIRECTED); 2476 if (skb) 2477 ieee80211_tx_skb(sdata, skb); 2478 } 2479 2480 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2481 { 2482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2483 const u8 *ssid; 2484 u8 *dst = ifmgd->associated->bssid; 2485 u8 unicast_limit = max(1, max_probe_tries - 3); 2486 struct sta_info *sta; 2487 2488 /* 2489 * Try sending broadcast probe requests for the last three 2490 * probe requests after the first ones failed since some 2491 * buggy APs only support broadcast probe requests. 2492 */ 2493 if (ifmgd->probe_send_count >= unicast_limit) 2494 dst = NULL; 2495 2496 /* 2497 * When the hardware reports an accurate Tx ACK status, it's 2498 * better to send a nullfunc frame instead of a probe request, 2499 * as it will kick us off the AP quickly if we aren't associated 2500 * anymore. The timeout will be reset if the frame is ACKed by 2501 * the AP. 2502 */ 2503 ifmgd->probe_send_count++; 2504 2505 if (dst) { 2506 mutex_lock(&sdata->local->sta_mtx); 2507 sta = sta_info_get(sdata, dst); 2508 if (!WARN_ON(!sta)) 2509 ieee80211_check_fast_rx(sta); 2510 mutex_unlock(&sdata->local->sta_mtx); 2511 } 2512 2513 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2514 ifmgd->nullfunc_failed = false; 2515 ieee80211_send_nullfunc(sdata->local, sdata, false); 2516 } else { 2517 int ssid_len; 2518 2519 rcu_read_lock(); 2520 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2521 if (WARN_ON_ONCE(ssid == NULL)) 2522 ssid_len = 0; 2523 else 2524 ssid_len = ssid[1]; 2525 2526 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2527 ssid + 2, ssid_len, 2528 ifmgd->associated->channel); 2529 rcu_read_unlock(); 2530 } 2531 2532 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2533 run_again(sdata, ifmgd->probe_timeout); 2534 } 2535 2536 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2537 bool beacon) 2538 { 2539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2540 bool already = false; 2541 2542 if (!ieee80211_sdata_running(sdata)) 2543 return; 2544 2545 sdata_lock(sdata); 2546 2547 if (!ifmgd->associated) 2548 goto out; 2549 2550 mutex_lock(&sdata->local->mtx); 2551 2552 if (sdata->local->tmp_channel || sdata->local->scanning) { 2553 mutex_unlock(&sdata->local->mtx); 2554 goto out; 2555 } 2556 2557 if (beacon) { 2558 mlme_dbg_ratelimited(sdata, 2559 "detected beacon loss from AP (missed %d beacons) - probing\n", 2560 beacon_loss_count); 2561 2562 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2563 } 2564 2565 /* 2566 * The driver/our work has already reported this event or the 2567 * connection monitoring has kicked in and we have already sent 2568 * a probe request. Or maybe the AP died and the driver keeps 2569 * reporting until we disassociate... 2570 * 2571 * In either case we have to ignore the current call to this 2572 * function (except for setting the correct probe reason bit) 2573 * because otherwise we would reset the timer every time and 2574 * never check whether we received a probe response! 2575 */ 2576 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2577 already = true; 2578 2579 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2580 2581 mutex_unlock(&sdata->local->mtx); 2582 2583 if (already) 2584 goto out; 2585 2586 mutex_lock(&sdata->local->iflist_mtx); 2587 ieee80211_recalc_ps(sdata->local); 2588 mutex_unlock(&sdata->local->iflist_mtx); 2589 2590 ifmgd->probe_send_count = 0; 2591 ieee80211_mgd_probe_ap_send(sdata); 2592 out: 2593 sdata_unlock(sdata); 2594 } 2595 2596 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2597 struct ieee80211_vif *vif) 2598 { 2599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2601 struct cfg80211_bss *cbss; 2602 struct sk_buff *skb; 2603 const u8 *ssid; 2604 int ssid_len; 2605 2606 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2607 return NULL; 2608 2609 sdata_assert_lock(sdata); 2610 2611 if (ifmgd->associated) 2612 cbss = ifmgd->associated; 2613 else if (ifmgd->auth_data) 2614 cbss = ifmgd->auth_data->bss; 2615 else if (ifmgd->assoc_data) 2616 cbss = ifmgd->assoc_data->bss; 2617 else 2618 return NULL; 2619 2620 rcu_read_lock(); 2621 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2622 if (WARN_ON_ONCE(ssid == NULL)) 2623 ssid_len = 0; 2624 else 2625 ssid_len = ssid[1]; 2626 2627 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2628 (u32) -1, cbss->channel, 2629 ssid + 2, ssid_len, 2630 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2631 rcu_read_unlock(); 2632 2633 return skb; 2634 } 2635 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2636 2637 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2638 const u8 *buf, size_t len, bool tx, 2639 u16 reason) 2640 { 2641 struct ieee80211_event event = { 2642 .type = MLME_EVENT, 2643 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2644 .u.mlme.reason = reason, 2645 }; 2646 2647 if (tx) 2648 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2649 else 2650 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2651 2652 drv_event_callback(sdata->local, sdata, &event); 2653 } 2654 2655 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2656 { 2657 struct ieee80211_local *local = sdata->local; 2658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2659 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2660 bool tx; 2661 2662 sdata_lock(sdata); 2663 if (!ifmgd->associated) { 2664 sdata_unlock(sdata); 2665 return; 2666 } 2667 2668 tx = !sdata->csa_block_tx; 2669 2670 /* AP is probably out of range (or not reachable for another reason) so 2671 * remove the bss struct for that AP. 2672 */ 2673 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2674 2675 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2676 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2677 tx, frame_buf); 2678 mutex_lock(&local->mtx); 2679 sdata->vif.csa_active = false; 2680 ifmgd->csa_waiting_bcn = false; 2681 if (sdata->csa_block_tx) { 2682 ieee80211_wake_vif_queues(local, sdata, 2683 IEEE80211_QUEUE_STOP_REASON_CSA); 2684 sdata->csa_block_tx = false; 2685 } 2686 mutex_unlock(&local->mtx); 2687 2688 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2689 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2690 2691 sdata_unlock(sdata); 2692 } 2693 2694 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2695 { 2696 struct ieee80211_sub_if_data *sdata = 2697 container_of(work, struct ieee80211_sub_if_data, 2698 u.mgd.beacon_connection_loss_work); 2699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2700 2701 if (ifmgd->associated) 2702 ifmgd->beacon_loss_count++; 2703 2704 if (ifmgd->connection_loss) { 2705 sdata_info(sdata, "Connection to AP %pM lost\n", 2706 ifmgd->bssid); 2707 __ieee80211_disconnect(sdata); 2708 } else { 2709 ieee80211_mgd_probe_ap(sdata, true); 2710 } 2711 } 2712 2713 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2714 { 2715 struct ieee80211_sub_if_data *sdata = 2716 container_of(work, struct ieee80211_sub_if_data, 2717 u.mgd.csa_connection_drop_work); 2718 2719 __ieee80211_disconnect(sdata); 2720 } 2721 2722 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2723 { 2724 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2725 struct ieee80211_hw *hw = &sdata->local->hw; 2726 2727 trace_api_beacon_loss(sdata); 2728 2729 sdata->u.mgd.connection_loss = false; 2730 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2731 } 2732 EXPORT_SYMBOL(ieee80211_beacon_loss); 2733 2734 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2735 { 2736 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2737 struct ieee80211_hw *hw = &sdata->local->hw; 2738 2739 trace_api_connection_loss(sdata); 2740 2741 sdata->u.mgd.connection_loss = true; 2742 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2743 } 2744 EXPORT_SYMBOL(ieee80211_connection_loss); 2745 2746 2747 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2748 bool assoc) 2749 { 2750 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2751 2752 sdata_assert_lock(sdata); 2753 2754 if (!assoc) { 2755 /* 2756 * we are not authenticated yet, the only timer that could be 2757 * running is the timeout for the authentication response which 2758 * which is not relevant anymore. 2759 */ 2760 del_timer_sync(&sdata->u.mgd.timer); 2761 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2762 2763 eth_zero_addr(sdata->u.mgd.bssid); 2764 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2765 sdata->u.mgd.flags = 0; 2766 mutex_lock(&sdata->local->mtx); 2767 ieee80211_vif_release_channel(sdata); 2768 mutex_unlock(&sdata->local->mtx); 2769 } 2770 2771 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2772 kfree(auth_data); 2773 sdata->u.mgd.auth_data = NULL; 2774 } 2775 2776 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2777 bool assoc, bool abandon) 2778 { 2779 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2780 2781 sdata_assert_lock(sdata); 2782 2783 if (!assoc) { 2784 /* 2785 * we are not associated yet, the only timer that could be 2786 * running is the timeout for the association response which 2787 * which is not relevant anymore. 2788 */ 2789 del_timer_sync(&sdata->u.mgd.timer); 2790 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2791 2792 eth_zero_addr(sdata->u.mgd.bssid); 2793 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2794 sdata->u.mgd.flags = 0; 2795 sdata->vif.mu_mimo_owner = false; 2796 2797 mutex_lock(&sdata->local->mtx); 2798 ieee80211_vif_release_channel(sdata); 2799 mutex_unlock(&sdata->local->mtx); 2800 2801 if (abandon) 2802 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2803 } 2804 2805 kfree(assoc_data); 2806 sdata->u.mgd.assoc_data = NULL; 2807 } 2808 2809 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2810 struct ieee80211_mgmt *mgmt, size_t len) 2811 { 2812 struct ieee80211_local *local = sdata->local; 2813 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2814 u8 *pos; 2815 struct ieee802_11_elems elems; 2816 u32 tx_flags = 0; 2817 2818 pos = mgmt->u.auth.variable; 2819 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2820 mgmt->bssid, auth_data->bss->bssid); 2821 if (!elems.challenge) 2822 return; 2823 auth_data->expected_transaction = 4; 2824 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2825 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2826 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2827 IEEE80211_TX_INTFL_MLME_CONN_TX; 2828 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2829 elems.challenge - 2, elems.challenge_len + 2, 2830 auth_data->bss->bssid, auth_data->bss->bssid, 2831 auth_data->key, auth_data->key_len, 2832 auth_data->key_idx, tx_flags); 2833 } 2834 2835 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2836 const u8 *bssid) 2837 { 2838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2839 struct sta_info *sta; 2840 bool result = true; 2841 2842 sdata_info(sdata, "authenticated\n"); 2843 ifmgd->auth_data->done = true; 2844 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2845 ifmgd->auth_data->timeout_started = true; 2846 run_again(sdata, ifmgd->auth_data->timeout); 2847 2848 /* move station state to auth */ 2849 mutex_lock(&sdata->local->sta_mtx); 2850 sta = sta_info_get(sdata, bssid); 2851 if (!sta) { 2852 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2853 result = false; 2854 goto out; 2855 } 2856 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2857 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2858 result = false; 2859 goto out; 2860 } 2861 2862 out: 2863 mutex_unlock(&sdata->local->sta_mtx); 2864 return result; 2865 } 2866 2867 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2868 struct ieee80211_mgmt *mgmt, size_t len) 2869 { 2870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2871 u8 bssid[ETH_ALEN]; 2872 u16 auth_alg, auth_transaction, status_code; 2873 struct ieee80211_event event = { 2874 .type = MLME_EVENT, 2875 .u.mlme.data = AUTH_EVENT, 2876 }; 2877 2878 sdata_assert_lock(sdata); 2879 2880 if (len < 24 + 6) 2881 return; 2882 2883 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2884 return; 2885 2886 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2887 2888 if (!ether_addr_equal(bssid, mgmt->bssid)) 2889 return; 2890 2891 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2892 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2893 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2894 2895 if (auth_alg != ifmgd->auth_data->algorithm || 2896 (auth_alg != WLAN_AUTH_SAE && 2897 auth_transaction != ifmgd->auth_data->expected_transaction) || 2898 (auth_alg == WLAN_AUTH_SAE && 2899 (auth_transaction < ifmgd->auth_data->expected_transaction || 2900 auth_transaction > 2))) { 2901 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2902 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2903 auth_transaction, 2904 ifmgd->auth_data->expected_transaction); 2905 return; 2906 } 2907 2908 if (status_code != WLAN_STATUS_SUCCESS) { 2909 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2910 mgmt->sa, status_code); 2911 ieee80211_destroy_auth_data(sdata, false); 2912 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2913 event.u.mlme.status = MLME_DENIED; 2914 event.u.mlme.reason = status_code; 2915 drv_event_callback(sdata->local, sdata, &event); 2916 return; 2917 } 2918 2919 switch (ifmgd->auth_data->algorithm) { 2920 case WLAN_AUTH_OPEN: 2921 case WLAN_AUTH_LEAP: 2922 case WLAN_AUTH_FT: 2923 case WLAN_AUTH_SAE: 2924 case WLAN_AUTH_FILS_SK: 2925 case WLAN_AUTH_FILS_SK_PFS: 2926 case WLAN_AUTH_FILS_PK: 2927 break; 2928 case WLAN_AUTH_SHARED_KEY: 2929 if (ifmgd->auth_data->expected_transaction != 4) { 2930 ieee80211_auth_challenge(sdata, mgmt, len); 2931 /* need another frame */ 2932 return; 2933 } 2934 break; 2935 default: 2936 WARN_ONCE(1, "invalid auth alg %d", 2937 ifmgd->auth_data->algorithm); 2938 return; 2939 } 2940 2941 event.u.mlme.status = MLME_SUCCESS; 2942 drv_event_callback(sdata->local, sdata, &event); 2943 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2944 (auth_transaction == 2 && 2945 ifmgd->auth_data->expected_transaction == 2)) { 2946 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2947 goto out_err; 2948 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2949 auth_transaction == 2) { 2950 sdata_info(sdata, "SAE peer confirmed\n"); 2951 ifmgd->auth_data->peer_confirmed = true; 2952 } 2953 2954 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2955 return; 2956 out_err: 2957 mutex_unlock(&sdata->local->sta_mtx); 2958 /* ignore frame -- wait for timeout */ 2959 } 2960 2961 #define case_WLAN(type) \ 2962 case WLAN_REASON_##type: return #type 2963 2964 const char *ieee80211_get_reason_code_string(u16 reason_code) 2965 { 2966 switch (reason_code) { 2967 case_WLAN(UNSPECIFIED); 2968 case_WLAN(PREV_AUTH_NOT_VALID); 2969 case_WLAN(DEAUTH_LEAVING); 2970 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2971 case_WLAN(DISASSOC_AP_BUSY); 2972 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2973 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2974 case_WLAN(DISASSOC_STA_HAS_LEFT); 2975 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2976 case_WLAN(DISASSOC_BAD_POWER); 2977 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2978 case_WLAN(INVALID_IE); 2979 case_WLAN(MIC_FAILURE); 2980 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2981 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2982 case_WLAN(IE_DIFFERENT); 2983 case_WLAN(INVALID_GROUP_CIPHER); 2984 case_WLAN(INVALID_PAIRWISE_CIPHER); 2985 case_WLAN(INVALID_AKMP); 2986 case_WLAN(UNSUPP_RSN_VERSION); 2987 case_WLAN(INVALID_RSN_IE_CAP); 2988 case_WLAN(IEEE8021X_FAILED); 2989 case_WLAN(CIPHER_SUITE_REJECTED); 2990 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2991 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2992 case_WLAN(DISASSOC_LOW_ACK); 2993 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2994 case_WLAN(QSTA_LEAVE_QBSS); 2995 case_WLAN(QSTA_NOT_USE); 2996 case_WLAN(QSTA_REQUIRE_SETUP); 2997 case_WLAN(QSTA_TIMEOUT); 2998 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2999 case_WLAN(MESH_PEER_CANCELED); 3000 case_WLAN(MESH_MAX_PEERS); 3001 case_WLAN(MESH_CONFIG); 3002 case_WLAN(MESH_CLOSE); 3003 case_WLAN(MESH_MAX_RETRIES); 3004 case_WLAN(MESH_CONFIRM_TIMEOUT); 3005 case_WLAN(MESH_INVALID_GTK); 3006 case_WLAN(MESH_INCONSISTENT_PARAM); 3007 case_WLAN(MESH_INVALID_SECURITY); 3008 case_WLAN(MESH_PATH_ERROR); 3009 case_WLAN(MESH_PATH_NOFORWARD); 3010 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3011 case_WLAN(MAC_EXISTS_IN_MBSS); 3012 case_WLAN(MESH_CHAN_REGULATORY); 3013 case_WLAN(MESH_CHAN); 3014 default: return "<unknown>"; 3015 } 3016 } 3017 3018 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3019 struct ieee80211_mgmt *mgmt, size_t len) 3020 { 3021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3022 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3023 3024 sdata_assert_lock(sdata); 3025 3026 if (len < 24 + 2) 3027 return; 3028 3029 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3030 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3031 return; 3032 } 3033 3034 if (ifmgd->associated && 3035 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3036 const u8 *bssid = ifmgd->associated->bssid; 3037 3038 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3039 bssid, reason_code, 3040 ieee80211_get_reason_code_string(reason_code)); 3041 3042 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3043 3044 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3045 reason_code); 3046 return; 3047 } 3048 3049 if (ifmgd->assoc_data && 3050 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3051 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3052 3053 sdata_info(sdata, 3054 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3055 bssid, reason_code, 3056 ieee80211_get_reason_code_string(reason_code)); 3057 3058 ieee80211_destroy_assoc_data(sdata, false, true); 3059 3060 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3061 return; 3062 } 3063 } 3064 3065 3066 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3067 struct ieee80211_mgmt *mgmt, size_t len) 3068 { 3069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3070 u16 reason_code; 3071 3072 sdata_assert_lock(sdata); 3073 3074 if (len < 24 + 2) 3075 return; 3076 3077 if (!ifmgd->associated || 3078 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3079 return; 3080 3081 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3082 3083 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3084 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3085 return; 3086 } 3087 3088 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3089 mgmt->sa, reason_code, 3090 ieee80211_get_reason_code_string(reason_code)); 3091 3092 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3093 3094 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3095 } 3096 3097 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3098 u8 *supp_rates, unsigned int supp_rates_len, 3099 u32 *rates, u32 *basic_rates, 3100 bool *have_higher_than_11mbit, 3101 int *min_rate, int *min_rate_index, 3102 int shift) 3103 { 3104 int i, j; 3105 3106 for (i = 0; i < supp_rates_len; i++) { 3107 int rate = supp_rates[i] & 0x7f; 3108 bool is_basic = !!(supp_rates[i] & 0x80); 3109 3110 if ((rate * 5 * (1 << shift)) > 110) 3111 *have_higher_than_11mbit = true; 3112 3113 /* 3114 * Skip HT and VHT BSS membership selectors since they're not 3115 * rates. 3116 * 3117 * Note: Even though the membership selector and the basic 3118 * rate flag share the same bit, they are not exactly 3119 * the same. 3120 */ 3121 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3122 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3123 continue; 3124 3125 for (j = 0; j < sband->n_bitrates; j++) { 3126 struct ieee80211_rate *br; 3127 int brate; 3128 3129 br = &sband->bitrates[j]; 3130 3131 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3132 if (brate == rate) { 3133 *rates |= BIT(j); 3134 if (is_basic) 3135 *basic_rates |= BIT(j); 3136 if ((rate * 5) < *min_rate) { 3137 *min_rate = rate * 5; 3138 *min_rate_index = j; 3139 } 3140 break; 3141 } 3142 } 3143 } 3144 } 3145 3146 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3147 const struct ieee802_11_elems *elems) 3148 { 3149 if (elems->ext_capab_len < 10) 3150 return false; 3151 3152 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3153 return false; 3154 3155 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3156 IEEE80211_HE_MAC_CAP0_TWT_RES; 3157 } 3158 3159 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3160 struct sta_info *sta, 3161 struct ieee802_11_elems *elems) 3162 { 3163 bool twt = ieee80211_twt_req_supported(sta, elems); 3164 3165 if (sdata->vif.bss_conf.twt_requester != twt) { 3166 sdata->vif.bss_conf.twt_requester = twt; 3167 return BSS_CHANGED_TWT; 3168 } 3169 return 0; 3170 } 3171 3172 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3173 struct cfg80211_bss *cbss, 3174 struct ieee80211_mgmt *mgmt, size_t len) 3175 { 3176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3177 struct ieee80211_local *local = sdata->local; 3178 struct ieee80211_supported_band *sband; 3179 struct sta_info *sta; 3180 u8 *pos; 3181 u16 capab_info, aid; 3182 struct ieee802_11_elems elems; 3183 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3184 const struct cfg80211_bss_ies *bss_ies = NULL; 3185 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3186 u32 changed = 0; 3187 int err; 3188 bool ret; 3189 3190 /* AssocResp and ReassocResp have identical structure */ 3191 3192 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3193 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3194 3195 /* 3196 * The 5 MSB of the AID field are reserved 3197 * (802.11-2016 9.4.1.8 AID field) 3198 */ 3199 aid &= 0x7ff; 3200 3201 ifmgd->broken_ap = false; 3202 3203 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3204 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3205 aid); 3206 aid = 0; 3207 ifmgd->broken_ap = true; 3208 } 3209 3210 pos = mgmt->u.assoc_resp.variable; 3211 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3212 mgmt->bssid, assoc_data->bss->bssid); 3213 3214 if (!elems.supp_rates) { 3215 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3216 return false; 3217 } 3218 3219 ifmgd->aid = aid; 3220 ifmgd->tdls_chan_switch_prohibited = 3221 elems.ext_capab && elems.ext_capab_len >= 5 && 3222 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3223 3224 /* 3225 * Some APs are erroneously not including some information in their 3226 * (re)association response frames. Try to recover by using the data 3227 * from the beacon or probe response. This seems to afflict mobile 3228 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3229 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3230 */ 3231 if ((assoc_data->wmm && !elems.wmm_param) || 3232 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3233 (!elems.ht_cap_elem || !elems.ht_operation)) || 3234 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3235 (!elems.vht_cap_elem || !elems.vht_operation))) { 3236 const struct cfg80211_bss_ies *ies; 3237 struct ieee802_11_elems bss_elems; 3238 3239 rcu_read_lock(); 3240 ies = rcu_dereference(cbss->ies); 3241 if (ies) 3242 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3243 GFP_ATOMIC); 3244 rcu_read_unlock(); 3245 if (!bss_ies) 3246 return false; 3247 3248 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3249 false, &bss_elems, 3250 mgmt->bssid, 3251 assoc_data->bss->bssid); 3252 if (assoc_data->wmm && 3253 !elems.wmm_param && bss_elems.wmm_param) { 3254 elems.wmm_param = bss_elems.wmm_param; 3255 sdata_info(sdata, 3256 "AP bug: WMM param missing from AssocResp\n"); 3257 } 3258 3259 /* 3260 * Also check if we requested HT/VHT, otherwise the AP doesn't 3261 * have to include the IEs in the (re)association response. 3262 */ 3263 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3264 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3265 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3266 sdata_info(sdata, 3267 "AP bug: HT capability missing from AssocResp\n"); 3268 } 3269 if (!elems.ht_operation && bss_elems.ht_operation && 3270 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3271 elems.ht_operation = bss_elems.ht_operation; 3272 sdata_info(sdata, 3273 "AP bug: HT operation missing from AssocResp\n"); 3274 } 3275 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3276 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3277 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3278 sdata_info(sdata, 3279 "AP bug: VHT capa missing from AssocResp\n"); 3280 } 3281 if (!elems.vht_operation && bss_elems.vht_operation && 3282 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3283 elems.vht_operation = bss_elems.vht_operation; 3284 sdata_info(sdata, 3285 "AP bug: VHT operation missing from AssocResp\n"); 3286 } 3287 } 3288 3289 /* 3290 * We previously checked these in the beacon/probe response, so 3291 * they should be present here. This is just a safety net. 3292 */ 3293 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3294 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3295 sdata_info(sdata, 3296 "HT AP is missing WMM params or HT capability/operation\n"); 3297 ret = false; 3298 goto out; 3299 } 3300 3301 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3302 (!elems.vht_cap_elem || !elems.vht_operation)) { 3303 sdata_info(sdata, 3304 "VHT AP is missing VHT capability/operation\n"); 3305 ret = false; 3306 goto out; 3307 } 3308 3309 mutex_lock(&sdata->local->sta_mtx); 3310 /* 3311 * station info was already allocated and inserted before 3312 * the association and should be available to us 3313 */ 3314 sta = sta_info_get(sdata, cbss->bssid); 3315 if (WARN_ON(!sta)) { 3316 mutex_unlock(&sdata->local->sta_mtx); 3317 ret = false; 3318 goto out; 3319 } 3320 3321 sband = ieee80211_get_sband(sdata); 3322 if (!sband) { 3323 mutex_unlock(&sdata->local->sta_mtx); 3324 ret = false; 3325 goto out; 3326 } 3327 3328 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3329 (!elems.he_cap || !elems.he_operation)) { 3330 mutex_unlock(&sdata->local->sta_mtx); 3331 sdata_info(sdata, 3332 "HE AP is missing HE capability/operation\n"); 3333 ret = false; 3334 goto out; 3335 } 3336 3337 /* Set up internal HT/VHT capabilities */ 3338 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3339 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3340 elems.ht_cap_elem, sta); 3341 3342 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3343 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3344 elems.vht_cap_elem, sta); 3345 3346 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3347 elems.he_cap) { 3348 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3349 elems.he_cap, 3350 elems.he_cap_len, 3351 sta); 3352 3353 bss_conf->he_support = sta->sta.he_cap.has_he; 3354 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 3355 } else { 3356 bss_conf->he_support = false; 3357 bss_conf->twt_requester = false; 3358 } 3359 3360 if (bss_conf->he_support) { 3361 bss_conf->bss_color = 3362 le32_get_bits(elems.he_operation->he_oper_params, 3363 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3364 3365 bss_conf->htc_trig_based_pkt_ext = 3366 le32_get_bits(elems.he_operation->he_oper_params, 3367 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3368 bss_conf->frame_time_rts_th = 3369 le32_get_bits(elems.he_operation->he_oper_params, 3370 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3371 3372 bss_conf->multi_sta_back_32bit = 3373 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3374 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3375 3376 bss_conf->ack_enabled = 3377 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3378 IEEE80211_HE_MAC_CAP2_ACK_EN; 3379 3380 bss_conf->uora_exists = !!elems.uora_element; 3381 if (elems.uora_element) 3382 bss_conf->uora_ocw_range = elems.uora_element[0]; 3383 3384 /* TODO: OPEN: what happens if BSS color disable is set? */ 3385 } 3386 3387 if (cbss->transmitted_bss) { 3388 bss_conf->nontransmitted = true; 3389 ether_addr_copy(bss_conf->transmitter_bssid, 3390 cbss->transmitted_bss->bssid); 3391 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3392 bss_conf->bssid_index = cbss->bssid_index; 3393 } 3394 3395 /* 3396 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3397 * in their association response, so ignore that data for our own 3398 * configuration. If it changed since the last beacon, we'll get the 3399 * next beacon and update then. 3400 */ 3401 3402 /* 3403 * If an operating mode notification IE is present, override the 3404 * NSS calculation (that would be done in rate_control_rate_init()) 3405 * and use the # of streams from that element. 3406 */ 3407 if (elems.opmode_notif && 3408 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3409 u8 nss; 3410 3411 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3412 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3413 nss += 1; 3414 sta->sta.rx_nss = nss; 3415 } 3416 3417 rate_control_rate_init(sta); 3418 3419 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3420 set_sta_flag(sta, WLAN_STA_MFP); 3421 sta->sta.mfp = true; 3422 } else { 3423 sta->sta.mfp = false; 3424 } 3425 3426 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3427 3428 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3429 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3430 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3431 if (err) { 3432 sdata_info(sdata, 3433 "failed to move station %pM to desired state\n", 3434 sta->sta.addr); 3435 WARN_ON(__sta_info_destroy(sta)); 3436 mutex_unlock(&sdata->local->sta_mtx); 3437 ret = false; 3438 goto out; 3439 } 3440 3441 mutex_unlock(&sdata->local->sta_mtx); 3442 3443 /* 3444 * Always handle WMM once after association regardless 3445 * of the first value the AP uses. Setting -1 here has 3446 * that effect because the AP values is an unsigned 3447 * 4-bit value. 3448 */ 3449 ifmgd->wmm_last_param_set = -1; 3450 ifmgd->mu_edca_last_param_set = -1; 3451 3452 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3453 ieee80211_set_wmm_default(sdata, false, false); 3454 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3455 elems.wmm_param_len, 3456 elems.mu_edca_param_set)) { 3457 /* still enable QoS since we might have HT/VHT */ 3458 ieee80211_set_wmm_default(sdata, false, true); 3459 /* set the disable-WMM flag in this case to disable 3460 * tracking WMM parameter changes in the beacon if 3461 * the parameters weren't actually valid. Doing so 3462 * avoids changing parameters very strangely when 3463 * the AP is going back and forth between valid and 3464 * invalid parameters. 3465 */ 3466 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3467 } 3468 changed |= BSS_CHANGED_QOS; 3469 3470 if (elems.max_idle_period_ie) { 3471 bss_conf->max_idle_period = 3472 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3473 bss_conf->protected_keep_alive = 3474 !!(elems.max_idle_period_ie->idle_options & 3475 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3476 changed |= BSS_CHANGED_KEEP_ALIVE; 3477 } else { 3478 bss_conf->max_idle_period = 0; 3479 bss_conf->protected_keep_alive = false; 3480 } 3481 3482 /* set AID and assoc capability, 3483 * ieee80211_set_associated() will tell the driver */ 3484 bss_conf->aid = aid; 3485 bss_conf->assoc_capability = capab_info; 3486 ieee80211_set_associated(sdata, cbss, changed); 3487 3488 /* 3489 * If we're using 4-addr mode, let the AP know that we're 3490 * doing so, so that it can create the STA VLAN on its side 3491 */ 3492 if (ifmgd->use_4addr) 3493 ieee80211_send_4addr_nullfunc(local, sdata); 3494 3495 /* 3496 * Start timer to probe the connection to the AP now. 3497 * Also start the timer that will detect beacon loss. 3498 */ 3499 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3500 ieee80211_sta_reset_beacon_monitor(sdata); 3501 3502 ret = true; 3503 out: 3504 kfree(bss_ies); 3505 return ret; 3506 } 3507 3508 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3509 struct ieee80211_mgmt *mgmt, 3510 size_t len) 3511 { 3512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3513 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3514 u16 capab_info, status_code, aid; 3515 struct ieee802_11_elems elems; 3516 int ac, uapsd_queues = -1; 3517 u8 *pos; 3518 bool reassoc; 3519 struct cfg80211_bss *bss; 3520 struct ieee80211_event event = { 3521 .type = MLME_EVENT, 3522 .u.mlme.data = ASSOC_EVENT, 3523 }; 3524 3525 sdata_assert_lock(sdata); 3526 3527 if (!assoc_data) 3528 return; 3529 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3530 return; 3531 3532 /* 3533 * AssocResp and ReassocResp have identical structure, so process both 3534 * of them in this function. 3535 */ 3536 3537 if (len < 24 + 6) 3538 return; 3539 3540 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3541 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3542 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3543 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3544 3545 sdata_info(sdata, 3546 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3547 reassoc ? "Rea" : "A", mgmt->sa, 3548 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3549 3550 if (assoc_data->fils_kek_len && 3551 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3552 return; 3553 3554 pos = mgmt->u.assoc_resp.variable; 3555 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3556 mgmt->bssid, assoc_data->bss->bssid); 3557 3558 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3559 elems.timeout_int && 3560 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3561 u32 tu, ms; 3562 tu = le32_to_cpu(elems.timeout_int->value); 3563 ms = tu * 1024 / 1000; 3564 sdata_info(sdata, 3565 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3566 mgmt->sa, tu, ms); 3567 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3568 assoc_data->timeout_started = true; 3569 if (ms > IEEE80211_ASSOC_TIMEOUT) 3570 run_again(sdata, assoc_data->timeout); 3571 return; 3572 } 3573 3574 bss = assoc_data->bss; 3575 3576 if (status_code != WLAN_STATUS_SUCCESS) { 3577 sdata_info(sdata, "%pM denied association (code=%d)\n", 3578 mgmt->sa, status_code); 3579 ieee80211_destroy_assoc_data(sdata, false, false); 3580 event.u.mlme.status = MLME_DENIED; 3581 event.u.mlme.reason = status_code; 3582 drv_event_callback(sdata->local, sdata, &event); 3583 } else { 3584 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3585 /* oops -- internal error -- send timeout for now */ 3586 ieee80211_destroy_assoc_data(sdata, false, false); 3587 cfg80211_assoc_timeout(sdata->dev, bss); 3588 return; 3589 } 3590 event.u.mlme.status = MLME_SUCCESS; 3591 drv_event_callback(sdata->local, sdata, &event); 3592 sdata_info(sdata, "associated\n"); 3593 3594 /* 3595 * destroy assoc_data afterwards, as otherwise an idle 3596 * recalc after assoc_data is NULL but before associated 3597 * is set can cause the interface to go idle 3598 */ 3599 ieee80211_destroy_assoc_data(sdata, true, false); 3600 3601 /* get uapsd queues configuration */ 3602 uapsd_queues = 0; 3603 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3604 if (sdata->tx_conf[ac].uapsd) 3605 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3606 } 3607 3608 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3609 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3610 } 3611 3612 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3613 struct ieee80211_mgmt *mgmt, size_t len, 3614 struct ieee80211_rx_status *rx_status) 3615 { 3616 struct ieee80211_local *local = sdata->local; 3617 struct ieee80211_bss *bss; 3618 struct ieee80211_channel *channel; 3619 3620 sdata_assert_lock(sdata); 3621 3622 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3623 if (!channel) 3624 return; 3625 3626 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3627 if (bss) { 3628 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3629 ieee80211_rx_bss_put(local, bss); 3630 } 3631 } 3632 3633 3634 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3635 struct sk_buff *skb) 3636 { 3637 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3638 struct ieee80211_if_managed *ifmgd; 3639 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3640 size_t baselen, len = skb->len; 3641 3642 ifmgd = &sdata->u.mgd; 3643 3644 sdata_assert_lock(sdata); 3645 3646 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3647 return; /* ignore ProbeResp to foreign address */ 3648 3649 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3650 if (baselen > len) 3651 return; 3652 3653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3654 3655 if (ifmgd->associated && 3656 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3657 ieee80211_reset_ap_probe(sdata); 3658 } 3659 3660 /* 3661 * This is the canonical list of information elements we care about, 3662 * the filter code also gives us all changes to the Microsoft OUI 3663 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3664 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3665 * changes to requested client power. 3666 * 3667 * We implement beacon filtering in software since that means we can 3668 * avoid processing the frame here and in cfg80211, and userspace 3669 * will not be able to tell whether the hardware supports it or not. 3670 * 3671 * XXX: This list needs to be dynamic -- userspace needs to be able to 3672 * add items it requires. It also needs to be able to tell us to 3673 * look out for other vendor IEs. 3674 */ 3675 static const u64 care_about_ies = 3676 (1ULL << WLAN_EID_COUNTRY) | 3677 (1ULL << WLAN_EID_ERP_INFO) | 3678 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3679 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3680 (1ULL << WLAN_EID_HT_CAPABILITY) | 3681 (1ULL << WLAN_EID_HT_OPERATION) | 3682 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3683 3684 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3685 struct ieee80211_if_managed *ifmgd, 3686 struct ieee80211_bss_conf *bss_conf, 3687 struct ieee80211_local *local, 3688 struct ieee80211_rx_status *rx_status) 3689 { 3690 /* Track average RSSI from the Beacon frames of the current AP */ 3691 3692 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3693 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3694 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3695 ifmgd->last_cqm_event_signal = 0; 3696 ifmgd->count_beacon_signal = 1; 3697 ifmgd->last_ave_beacon_signal = 0; 3698 } else { 3699 ifmgd->count_beacon_signal++; 3700 } 3701 3702 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3703 3704 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3705 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3706 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3707 int last_sig = ifmgd->last_ave_beacon_signal; 3708 struct ieee80211_event event = { 3709 .type = RSSI_EVENT, 3710 }; 3711 3712 /* 3713 * if signal crosses either of the boundaries, invoke callback 3714 * with appropriate parameters 3715 */ 3716 if (sig > ifmgd->rssi_max_thold && 3717 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3718 ifmgd->last_ave_beacon_signal = sig; 3719 event.u.rssi.data = RSSI_EVENT_HIGH; 3720 drv_event_callback(local, sdata, &event); 3721 } else if (sig < ifmgd->rssi_min_thold && 3722 (last_sig >= ifmgd->rssi_max_thold || 3723 last_sig == 0)) { 3724 ifmgd->last_ave_beacon_signal = sig; 3725 event.u.rssi.data = RSSI_EVENT_LOW; 3726 drv_event_callback(local, sdata, &event); 3727 } 3728 } 3729 3730 if (bss_conf->cqm_rssi_thold && 3731 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3732 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3733 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3734 int last_event = ifmgd->last_cqm_event_signal; 3735 int thold = bss_conf->cqm_rssi_thold; 3736 int hyst = bss_conf->cqm_rssi_hyst; 3737 3738 if (sig < thold && 3739 (last_event == 0 || sig < last_event - hyst)) { 3740 ifmgd->last_cqm_event_signal = sig; 3741 ieee80211_cqm_rssi_notify( 3742 &sdata->vif, 3743 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3744 sig, GFP_KERNEL); 3745 } else if (sig > thold && 3746 (last_event == 0 || sig > last_event + hyst)) { 3747 ifmgd->last_cqm_event_signal = sig; 3748 ieee80211_cqm_rssi_notify( 3749 &sdata->vif, 3750 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3751 sig, GFP_KERNEL); 3752 } 3753 } 3754 3755 if (bss_conf->cqm_rssi_low && 3756 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3757 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3758 int last_event = ifmgd->last_cqm_event_signal; 3759 int low = bss_conf->cqm_rssi_low; 3760 int high = bss_conf->cqm_rssi_high; 3761 3762 if (sig < low && 3763 (last_event == 0 || last_event >= low)) { 3764 ifmgd->last_cqm_event_signal = sig; 3765 ieee80211_cqm_rssi_notify( 3766 &sdata->vif, 3767 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3768 sig, GFP_KERNEL); 3769 } else if (sig > high && 3770 (last_event == 0 || last_event <= high)) { 3771 ifmgd->last_cqm_event_signal = sig; 3772 ieee80211_cqm_rssi_notify( 3773 &sdata->vif, 3774 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3775 sig, GFP_KERNEL); 3776 } 3777 } 3778 } 3779 3780 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3781 struct cfg80211_bss *bss) 3782 { 3783 if (ether_addr_equal(tx_bssid, bss->bssid)) 3784 return true; 3785 if (!bss->transmitted_bss) 3786 return false; 3787 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3788 } 3789 3790 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3791 struct ieee80211_mgmt *mgmt, size_t len, 3792 struct ieee80211_rx_status *rx_status) 3793 { 3794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3795 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3796 size_t baselen; 3797 struct ieee802_11_elems elems; 3798 struct ieee80211_local *local = sdata->local; 3799 struct ieee80211_chanctx_conf *chanctx_conf; 3800 struct ieee80211_channel *chan; 3801 struct sta_info *sta; 3802 u32 changed = 0; 3803 bool erp_valid; 3804 u8 erp_value = 0; 3805 u32 ncrc; 3806 u8 *bssid; 3807 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3808 3809 sdata_assert_lock(sdata); 3810 3811 /* Process beacon from the current BSS */ 3812 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3813 if (baselen > len) 3814 return; 3815 3816 rcu_read_lock(); 3817 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3818 if (!chanctx_conf) { 3819 rcu_read_unlock(); 3820 return; 3821 } 3822 3823 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3824 rcu_read_unlock(); 3825 return; 3826 } 3827 chan = chanctx_conf->def.chan; 3828 rcu_read_unlock(); 3829 3830 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3831 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3832 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3833 len - baselen, false, &elems, 3834 mgmt->bssid, 3835 ifmgd->assoc_data->bss->bssid); 3836 3837 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3838 3839 if (elems.dtim_period) 3840 ifmgd->dtim_period = elems.dtim_period; 3841 ifmgd->have_beacon = true; 3842 ifmgd->assoc_data->need_beacon = false; 3843 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3844 sdata->vif.bss_conf.sync_tsf = 3845 le64_to_cpu(mgmt->u.beacon.timestamp); 3846 sdata->vif.bss_conf.sync_device_ts = 3847 rx_status->device_timestamp; 3848 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3849 } 3850 3851 if (elems.mbssid_config_ie) 3852 bss_conf->profile_periodicity = 3853 elems.mbssid_config_ie->profile_periodicity; 3854 3855 if (elems.ext_capab_len >= 11 && 3856 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3857 bss_conf->ema_ap = true; 3858 3859 /* continue assoc process */ 3860 ifmgd->assoc_data->timeout = jiffies; 3861 ifmgd->assoc_data->timeout_started = true; 3862 run_again(sdata, ifmgd->assoc_data->timeout); 3863 return; 3864 } 3865 3866 if (!ifmgd->associated || 3867 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3868 return; 3869 bssid = ifmgd->associated->bssid; 3870 3871 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3872 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3873 local, rx_status); 3874 3875 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3876 mlme_dbg_ratelimited(sdata, 3877 "cancelling AP probe due to a received beacon\n"); 3878 ieee80211_reset_ap_probe(sdata); 3879 } 3880 3881 /* 3882 * Push the beacon loss detection into the future since 3883 * we are processing a beacon from the AP just now. 3884 */ 3885 ieee80211_sta_reset_beacon_monitor(sdata); 3886 3887 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3888 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3889 len - baselen, false, &elems, 3890 care_about_ies, ncrc, 3891 mgmt->bssid, bssid); 3892 3893 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3894 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3895 if (local->hw.conf.dynamic_ps_timeout > 0) { 3896 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3897 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3898 ieee80211_hw_config(local, 3899 IEEE80211_CONF_CHANGE_PS); 3900 } 3901 ieee80211_send_nullfunc(local, sdata, false); 3902 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3903 local->pspolling = true; 3904 3905 /* 3906 * Here is assumed that the driver will be 3907 * able to send ps-poll frame and receive a 3908 * response even though power save mode is 3909 * enabled, but some drivers might require 3910 * to disable power save here. This needs 3911 * to be investigated. 3912 */ 3913 ieee80211_send_pspoll(local, sdata); 3914 } 3915 } 3916 3917 if (sdata->vif.p2p || 3918 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3919 struct ieee80211_p2p_noa_attr noa = {}; 3920 int ret; 3921 3922 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3923 len - baselen, 3924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3925 (u8 *) &noa, sizeof(noa)); 3926 if (ret >= 2) { 3927 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3928 /* valid noa_attr and index changed */ 3929 sdata->u.mgd.p2p_noa_index = noa.index; 3930 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3931 changed |= BSS_CHANGED_P2P_PS; 3932 /* 3933 * make sure we update all information, the CRC 3934 * mechanism doesn't look at P2P attributes. 3935 */ 3936 ifmgd->beacon_crc_valid = false; 3937 } 3938 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3939 /* noa_attr not found and we had valid noa_attr before */ 3940 sdata->u.mgd.p2p_noa_index = -1; 3941 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3942 changed |= BSS_CHANGED_P2P_PS; 3943 ifmgd->beacon_crc_valid = false; 3944 } 3945 } 3946 3947 if (ifmgd->csa_waiting_bcn) 3948 ieee80211_chswitch_post_beacon(sdata); 3949 3950 /* 3951 * Update beacon timing and dtim count on every beacon appearance. This 3952 * will allow the driver to use the most updated values. Do it before 3953 * comparing this one with last received beacon. 3954 * IMPORTANT: These parameters would possibly be out of sync by the time 3955 * the driver will use them. The synchronized view is currently 3956 * guaranteed only in certain callbacks. 3957 */ 3958 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3959 sdata->vif.bss_conf.sync_tsf = 3960 le64_to_cpu(mgmt->u.beacon.timestamp); 3961 sdata->vif.bss_conf.sync_device_ts = 3962 rx_status->device_timestamp; 3963 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3964 } 3965 3966 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3967 return; 3968 ifmgd->beacon_crc = ncrc; 3969 ifmgd->beacon_crc_valid = true; 3970 3971 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3972 3973 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3974 rx_status->device_timestamp, 3975 &elems, true); 3976 3977 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3978 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3979 elems.wmm_param_len, 3980 elems.mu_edca_param_set)) 3981 changed |= BSS_CHANGED_QOS; 3982 3983 /* 3984 * If we haven't had a beacon before, tell the driver about the 3985 * DTIM period (and beacon timing if desired) now. 3986 */ 3987 if (!ifmgd->have_beacon) { 3988 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3989 bss_conf->dtim_period = elems.dtim_period ?: 1; 3990 3991 changed |= BSS_CHANGED_BEACON_INFO; 3992 ifmgd->have_beacon = true; 3993 3994 mutex_lock(&local->iflist_mtx); 3995 ieee80211_recalc_ps(local); 3996 mutex_unlock(&local->iflist_mtx); 3997 3998 ieee80211_recalc_ps_vif(sdata); 3999 } 4000 4001 if (elems.erp_info) { 4002 erp_valid = true; 4003 erp_value = elems.erp_info[0]; 4004 } else { 4005 erp_valid = false; 4006 } 4007 changed |= ieee80211_handle_bss_capability(sdata, 4008 le16_to_cpu(mgmt->u.beacon.capab_info), 4009 erp_valid, erp_value); 4010 4011 mutex_lock(&local->sta_mtx); 4012 sta = sta_info_get(sdata, bssid); 4013 4014 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4015 4016 if (ieee80211_config_bw(sdata, sta, 4017 elems.ht_cap_elem, elems.ht_operation, 4018 elems.vht_operation, elems.he_operation, 4019 bssid, &changed)) { 4020 mutex_unlock(&local->sta_mtx); 4021 sdata_info(sdata, 4022 "failed to follow AP %pM bandwidth change, disconnect\n", 4023 bssid); 4024 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4025 WLAN_REASON_DEAUTH_LEAVING, 4026 true, deauth_buf); 4027 ieee80211_report_disconnect(sdata, deauth_buf, 4028 sizeof(deauth_buf), true, 4029 WLAN_REASON_DEAUTH_LEAVING); 4030 return; 4031 } 4032 4033 if (sta && elems.opmode_notif) 4034 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4035 rx_status->band); 4036 mutex_unlock(&local->sta_mtx); 4037 4038 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4039 elems.country_elem, 4040 elems.country_elem_len, 4041 elems.pwr_constr_elem, 4042 elems.cisco_dtpc_elem); 4043 4044 ieee80211_bss_info_change_notify(sdata, changed); 4045 } 4046 4047 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4048 struct sk_buff *skb) 4049 { 4050 struct ieee80211_rx_status *rx_status; 4051 struct ieee80211_mgmt *mgmt; 4052 u16 fc; 4053 struct ieee802_11_elems elems; 4054 int ies_len; 4055 4056 rx_status = (struct ieee80211_rx_status *) skb->cb; 4057 mgmt = (struct ieee80211_mgmt *) skb->data; 4058 fc = le16_to_cpu(mgmt->frame_control); 4059 4060 sdata_lock(sdata); 4061 4062 switch (fc & IEEE80211_FCTL_STYPE) { 4063 case IEEE80211_STYPE_BEACON: 4064 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4065 break; 4066 case IEEE80211_STYPE_PROBE_RESP: 4067 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4068 break; 4069 case IEEE80211_STYPE_AUTH: 4070 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4071 break; 4072 case IEEE80211_STYPE_DEAUTH: 4073 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4074 break; 4075 case IEEE80211_STYPE_DISASSOC: 4076 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4077 break; 4078 case IEEE80211_STYPE_ASSOC_RESP: 4079 case IEEE80211_STYPE_REASSOC_RESP: 4080 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4081 break; 4082 case IEEE80211_STYPE_ACTION: 4083 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4084 ies_len = skb->len - 4085 offsetof(struct ieee80211_mgmt, 4086 u.action.u.chan_switch.variable); 4087 4088 if (ies_len < 0) 4089 break; 4090 4091 /* CSA IE cannot be overridden, no need for BSSID */ 4092 ieee802_11_parse_elems( 4093 mgmt->u.action.u.chan_switch.variable, 4094 ies_len, true, &elems, mgmt->bssid, NULL); 4095 4096 if (elems.parse_error) 4097 break; 4098 4099 ieee80211_sta_process_chanswitch(sdata, 4100 rx_status->mactime, 4101 rx_status->device_timestamp, 4102 &elems, false); 4103 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4104 ies_len = skb->len - 4105 offsetof(struct ieee80211_mgmt, 4106 u.action.u.ext_chan_switch.variable); 4107 4108 if (ies_len < 0) 4109 break; 4110 4111 /* 4112 * extended CSA IE can't be overridden, no need for 4113 * BSSID 4114 */ 4115 ieee802_11_parse_elems( 4116 mgmt->u.action.u.ext_chan_switch.variable, 4117 ies_len, true, &elems, mgmt->bssid, NULL); 4118 4119 if (elems.parse_error) 4120 break; 4121 4122 /* for the handling code pretend this was also an IE */ 4123 elems.ext_chansw_ie = 4124 &mgmt->u.action.u.ext_chan_switch.data; 4125 4126 ieee80211_sta_process_chanswitch(sdata, 4127 rx_status->mactime, 4128 rx_status->device_timestamp, 4129 &elems, false); 4130 } 4131 break; 4132 } 4133 sdata_unlock(sdata); 4134 } 4135 4136 static void ieee80211_sta_timer(struct timer_list *t) 4137 { 4138 struct ieee80211_sub_if_data *sdata = 4139 from_timer(sdata, t, u.mgd.timer); 4140 4141 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4142 } 4143 4144 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4145 u8 *bssid, u8 reason, bool tx) 4146 { 4147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4148 4149 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4150 tx, frame_buf); 4151 4152 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4153 reason); 4154 } 4155 4156 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4157 { 4158 struct ieee80211_local *local = sdata->local; 4159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4160 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4161 u32 tx_flags = 0; 4162 u16 trans = 1; 4163 u16 status = 0; 4164 u16 prepare_tx_duration = 0; 4165 4166 sdata_assert_lock(sdata); 4167 4168 if (WARN_ON_ONCE(!auth_data)) 4169 return -EINVAL; 4170 4171 auth_data->tries++; 4172 4173 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4174 sdata_info(sdata, "authentication with %pM timed out\n", 4175 auth_data->bss->bssid); 4176 4177 /* 4178 * Most likely AP is not in the range so remove the 4179 * bss struct for that AP. 4180 */ 4181 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4182 4183 return -ETIMEDOUT; 4184 } 4185 4186 if (auth_data->algorithm == WLAN_AUTH_SAE) 4187 prepare_tx_duration = 4188 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4189 4190 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4191 4192 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4193 auth_data->bss->bssid, auth_data->tries, 4194 IEEE80211_AUTH_MAX_TRIES); 4195 4196 auth_data->expected_transaction = 2; 4197 4198 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4199 trans = auth_data->sae_trans; 4200 status = auth_data->sae_status; 4201 auth_data->expected_transaction = trans; 4202 } 4203 4204 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4205 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4206 IEEE80211_TX_INTFL_MLME_CONN_TX; 4207 4208 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4209 auth_data->data, auth_data->data_len, 4210 auth_data->bss->bssid, 4211 auth_data->bss->bssid, NULL, 0, 0, 4212 tx_flags); 4213 4214 if (tx_flags == 0) { 4215 if (auth_data->algorithm == WLAN_AUTH_SAE) 4216 auth_data->timeout = jiffies + 4217 IEEE80211_AUTH_TIMEOUT_SAE; 4218 else 4219 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4220 } else { 4221 auth_data->timeout = 4222 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4223 } 4224 4225 auth_data->timeout_started = true; 4226 run_again(sdata, auth_data->timeout); 4227 4228 return 0; 4229 } 4230 4231 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4232 { 4233 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4234 struct ieee80211_local *local = sdata->local; 4235 4236 sdata_assert_lock(sdata); 4237 4238 assoc_data->tries++; 4239 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4240 sdata_info(sdata, "association with %pM timed out\n", 4241 assoc_data->bss->bssid); 4242 4243 /* 4244 * Most likely AP is not in the range so remove the 4245 * bss struct for that AP. 4246 */ 4247 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4248 4249 return -ETIMEDOUT; 4250 } 4251 4252 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4253 assoc_data->bss->bssid, assoc_data->tries, 4254 IEEE80211_ASSOC_MAX_TRIES); 4255 ieee80211_send_assoc(sdata); 4256 4257 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4258 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4259 assoc_data->timeout_started = true; 4260 run_again(sdata, assoc_data->timeout); 4261 } else { 4262 assoc_data->timeout = 4263 round_jiffies_up(jiffies + 4264 IEEE80211_ASSOC_TIMEOUT_LONG); 4265 assoc_data->timeout_started = true; 4266 run_again(sdata, assoc_data->timeout); 4267 } 4268 4269 return 0; 4270 } 4271 4272 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4273 __le16 fc, bool acked) 4274 { 4275 struct ieee80211_local *local = sdata->local; 4276 4277 sdata->u.mgd.status_fc = fc; 4278 sdata->u.mgd.status_acked = acked; 4279 sdata->u.mgd.status_received = true; 4280 4281 ieee80211_queue_work(&local->hw, &sdata->work); 4282 } 4283 4284 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4285 { 4286 struct ieee80211_local *local = sdata->local; 4287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4288 4289 sdata_lock(sdata); 4290 4291 if (ifmgd->status_received) { 4292 __le16 fc = ifmgd->status_fc; 4293 bool status_acked = ifmgd->status_acked; 4294 4295 ifmgd->status_received = false; 4296 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4297 if (status_acked) { 4298 if (ifmgd->auth_data->algorithm == 4299 WLAN_AUTH_SAE) 4300 ifmgd->auth_data->timeout = 4301 jiffies + 4302 IEEE80211_AUTH_TIMEOUT_SAE; 4303 else 4304 ifmgd->auth_data->timeout = 4305 jiffies + 4306 IEEE80211_AUTH_TIMEOUT_SHORT; 4307 run_again(sdata, ifmgd->auth_data->timeout); 4308 } else { 4309 ifmgd->auth_data->timeout = jiffies - 1; 4310 } 4311 ifmgd->auth_data->timeout_started = true; 4312 } else if (ifmgd->assoc_data && 4313 (ieee80211_is_assoc_req(fc) || 4314 ieee80211_is_reassoc_req(fc))) { 4315 if (status_acked) { 4316 ifmgd->assoc_data->timeout = 4317 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4318 run_again(sdata, ifmgd->assoc_data->timeout); 4319 } else { 4320 ifmgd->assoc_data->timeout = jiffies - 1; 4321 } 4322 ifmgd->assoc_data->timeout_started = true; 4323 } 4324 } 4325 4326 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4327 time_after(jiffies, ifmgd->auth_data->timeout)) { 4328 if (ifmgd->auth_data->done) { 4329 /* 4330 * ok ... we waited for assoc but userspace didn't, 4331 * so let's just kill the auth data 4332 */ 4333 ieee80211_destroy_auth_data(sdata, false); 4334 } else if (ieee80211_auth(sdata)) { 4335 u8 bssid[ETH_ALEN]; 4336 struct ieee80211_event event = { 4337 .type = MLME_EVENT, 4338 .u.mlme.data = AUTH_EVENT, 4339 .u.mlme.status = MLME_TIMEOUT, 4340 }; 4341 4342 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4343 4344 ieee80211_destroy_auth_data(sdata, false); 4345 4346 cfg80211_auth_timeout(sdata->dev, bssid); 4347 drv_event_callback(sdata->local, sdata, &event); 4348 } 4349 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4350 run_again(sdata, ifmgd->auth_data->timeout); 4351 4352 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4353 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4354 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4355 ieee80211_do_assoc(sdata)) { 4356 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4357 struct ieee80211_event event = { 4358 .type = MLME_EVENT, 4359 .u.mlme.data = ASSOC_EVENT, 4360 .u.mlme.status = MLME_TIMEOUT, 4361 }; 4362 4363 ieee80211_destroy_assoc_data(sdata, false, false); 4364 cfg80211_assoc_timeout(sdata->dev, bss); 4365 drv_event_callback(sdata->local, sdata, &event); 4366 } 4367 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4368 run_again(sdata, ifmgd->assoc_data->timeout); 4369 4370 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4371 ifmgd->associated) { 4372 u8 bssid[ETH_ALEN]; 4373 int max_tries; 4374 4375 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4376 4377 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4378 max_tries = max_nullfunc_tries; 4379 else 4380 max_tries = max_probe_tries; 4381 4382 /* ACK received for nullfunc probing frame */ 4383 if (!ifmgd->probe_send_count) 4384 ieee80211_reset_ap_probe(sdata); 4385 else if (ifmgd->nullfunc_failed) { 4386 if (ifmgd->probe_send_count < max_tries) { 4387 mlme_dbg(sdata, 4388 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4389 bssid, ifmgd->probe_send_count, 4390 max_tries); 4391 ieee80211_mgd_probe_ap_send(sdata); 4392 } else { 4393 mlme_dbg(sdata, 4394 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4395 bssid); 4396 ieee80211_sta_connection_lost(sdata, bssid, 4397 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4398 false); 4399 } 4400 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4401 run_again(sdata, ifmgd->probe_timeout); 4402 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4403 mlme_dbg(sdata, 4404 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4405 bssid, probe_wait_ms); 4406 ieee80211_sta_connection_lost(sdata, bssid, 4407 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4408 } else if (ifmgd->probe_send_count < max_tries) { 4409 mlme_dbg(sdata, 4410 "No probe response from AP %pM after %dms, try %d/%i\n", 4411 bssid, probe_wait_ms, 4412 ifmgd->probe_send_count, max_tries); 4413 ieee80211_mgd_probe_ap_send(sdata); 4414 } else { 4415 /* 4416 * We actually lost the connection ... or did we? 4417 * Let's make sure! 4418 */ 4419 mlme_dbg(sdata, 4420 "No probe response from AP %pM after %dms, disconnecting.\n", 4421 bssid, probe_wait_ms); 4422 4423 ieee80211_sta_connection_lost(sdata, bssid, 4424 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4425 } 4426 } 4427 4428 sdata_unlock(sdata); 4429 } 4430 4431 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4432 { 4433 struct ieee80211_sub_if_data *sdata = 4434 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4436 4437 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4438 return; 4439 4440 sdata->u.mgd.connection_loss = false; 4441 ieee80211_queue_work(&sdata->local->hw, 4442 &sdata->u.mgd.beacon_connection_loss_work); 4443 } 4444 4445 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4446 { 4447 struct ieee80211_sub_if_data *sdata = 4448 from_timer(sdata, t, u.mgd.conn_mon_timer); 4449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4450 struct ieee80211_local *local = sdata->local; 4451 4452 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4453 return; 4454 4455 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4456 } 4457 4458 static void ieee80211_sta_monitor_work(struct work_struct *work) 4459 { 4460 struct ieee80211_sub_if_data *sdata = 4461 container_of(work, struct ieee80211_sub_if_data, 4462 u.mgd.monitor_work); 4463 4464 ieee80211_mgd_probe_ap(sdata, false); 4465 } 4466 4467 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4468 { 4469 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4470 __ieee80211_stop_poll(sdata); 4471 4472 /* let's probe the connection once */ 4473 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4474 ieee80211_queue_work(&sdata->local->hw, 4475 &sdata->u.mgd.monitor_work); 4476 } 4477 } 4478 4479 #ifdef CONFIG_PM 4480 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4481 { 4482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4483 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4484 4485 sdata_lock(sdata); 4486 4487 if (ifmgd->auth_data || ifmgd->assoc_data) { 4488 const u8 *bssid = ifmgd->auth_data ? 4489 ifmgd->auth_data->bss->bssid : 4490 ifmgd->assoc_data->bss->bssid; 4491 4492 /* 4493 * If we are trying to authenticate / associate while suspending, 4494 * cfg80211 won't know and won't actually abort those attempts, 4495 * thus we need to do that ourselves. 4496 */ 4497 ieee80211_send_deauth_disassoc(sdata, bssid, 4498 IEEE80211_STYPE_DEAUTH, 4499 WLAN_REASON_DEAUTH_LEAVING, 4500 false, frame_buf); 4501 if (ifmgd->assoc_data) 4502 ieee80211_destroy_assoc_data(sdata, false, true); 4503 if (ifmgd->auth_data) 4504 ieee80211_destroy_auth_data(sdata, false); 4505 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4506 IEEE80211_DEAUTH_FRAME_LEN); 4507 } 4508 4509 /* This is a bit of a hack - we should find a better and more generic 4510 * solution to this. Normally when suspending, cfg80211 will in fact 4511 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4512 * auth (not so important) or assoc (this is the problem) process. 4513 * 4514 * As a consequence, it can happen that we are in the process of both 4515 * associating and suspending, and receive an association response 4516 * after cfg80211 has checked if it needs to disconnect, but before 4517 * we actually set the flag to drop incoming frames. This will then 4518 * cause the workqueue flush to process the association response in 4519 * the suspend, resulting in a successful association just before it 4520 * tries to remove the interface from the driver, which now though 4521 * has a channel context assigned ... this results in issues. 4522 * 4523 * To work around this (for now) simply deauth here again if we're 4524 * now connected. 4525 */ 4526 if (ifmgd->associated && !sdata->local->wowlan) { 4527 u8 bssid[ETH_ALEN]; 4528 struct cfg80211_deauth_request req = { 4529 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4530 .bssid = bssid, 4531 }; 4532 4533 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4534 ieee80211_mgd_deauth(sdata, &req); 4535 } 4536 4537 sdata_unlock(sdata); 4538 } 4539 4540 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4541 { 4542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4543 4544 sdata_lock(sdata); 4545 if (!ifmgd->associated) { 4546 sdata_unlock(sdata); 4547 return; 4548 } 4549 4550 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4551 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4552 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4553 ieee80211_sta_connection_lost(sdata, 4554 ifmgd->associated->bssid, 4555 WLAN_REASON_UNSPECIFIED, 4556 true); 4557 sdata_unlock(sdata); 4558 return; 4559 } 4560 sdata_unlock(sdata); 4561 } 4562 #endif 4563 4564 /* interface setup */ 4565 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4566 { 4567 struct ieee80211_if_managed *ifmgd; 4568 4569 ifmgd = &sdata->u.mgd; 4570 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4571 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4572 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4573 ieee80211_beacon_connection_loss_work); 4574 INIT_WORK(&ifmgd->csa_connection_drop_work, 4575 ieee80211_csa_connection_drop_work); 4576 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4577 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4578 ieee80211_tdls_peer_del_work); 4579 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4580 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4581 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4582 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4583 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4584 ieee80211_sta_handle_tspec_ac_params_wk); 4585 4586 ifmgd->flags = 0; 4587 ifmgd->powersave = sdata->wdev.ps; 4588 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4589 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4590 ifmgd->p2p_noa_index = -1; 4591 4592 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4593 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4594 else 4595 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4596 4597 /* Setup TDLS data */ 4598 spin_lock_init(&ifmgd->teardown_lock); 4599 ifmgd->teardown_skb = NULL; 4600 ifmgd->orig_teardown_skb = NULL; 4601 } 4602 4603 /* scan finished notification */ 4604 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4605 { 4606 struct ieee80211_sub_if_data *sdata; 4607 4608 /* Restart STA timers */ 4609 rcu_read_lock(); 4610 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4611 if (ieee80211_sdata_running(sdata)) 4612 ieee80211_restart_sta_timer(sdata); 4613 } 4614 rcu_read_unlock(); 4615 } 4616 4617 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4618 struct cfg80211_bss *cbss) 4619 { 4620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4621 const u8 *ht_cap_ie, *vht_cap_ie; 4622 const struct ieee80211_ht_cap *ht_cap; 4623 const struct ieee80211_vht_cap *vht_cap; 4624 u8 chains = 1; 4625 4626 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4627 return chains; 4628 4629 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4630 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4631 ht_cap = (void *)(ht_cap_ie + 2); 4632 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4633 /* 4634 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4635 * "Tx Unequal Modulation Supported" fields. 4636 */ 4637 } 4638 4639 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4640 return chains; 4641 4642 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4643 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4644 u8 nss; 4645 u16 tx_mcs_map; 4646 4647 vht_cap = (void *)(vht_cap_ie + 2); 4648 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4649 for (nss = 8; nss > 0; nss--) { 4650 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4651 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4652 break; 4653 } 4654 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4655 chains = max(chains, nss); 4656 } 4657 4658 return chains; 4659 } 4660 4661 static bool 4662 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4663 const struct ieee80211_he_operation *he_op) 4664 { 4665 const struct ieee80211_sta_he_cap *sta_he_cap = 4666 ieee80211_get_he_sta_cap(sband); 4667 u16 ap_min_req_set; 4668 int i; 4669 4670 if (!sta_he_cap || !he_op) 4671 return false; 4672 4673 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4674 4675 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4676 for (i = 0; i < 3; i++) { 4677 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4678 &sta_he_cap->he_mcs_nss_supp; 4679 u16 sta_mcs_map_rx = 4680 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4681 u16 sta_mcs_map_tx = 4682 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4683 u8 nss; 4684 bool verified = true; 4685 4686 /* 4687 * For each band there is a maximum of 8 spatial streams 4688 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4689 * of 2 bits per NSS (1-8), with the values defined in enum 4690 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4691 * capabilities aren't less than the AP's minimum requirements 4692 * for this HE BSS per SS. 4693 * It is enough to find one such band that meets the reqs. 4694 */ 4695 for (nss = 8; nss > 0; nss--) { 4696 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4697 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4698 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4699 4700 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4701 continue; 4702 4703 /* 4704 * Make sure the HE AP doesn't require MCSs that aren't 4705 * supported by the client 4706 */ 4707 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4708 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4709 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4710 verified = false; 4711 break; 4712 } 4713 } 4714 4715 if (verified) 4716 return true; 4717 } 4718 4719 /* If here, STA doesn't meet AP's HE min requirements */ 4720 return false; 4721 } 4722 4723 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4724 struct cfg80211_bss *cbss) 4725 { 4726 struct ieee80211_local *local = sdata->local; 4727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4728 const struct ieee80211_ht_cap *ht_cap = NULL; 4729 const struct ieee80211_ht_operation *ht_oper = NULL; 4730 const struct ieee80211_vht_operation *vht_oper = NULL; 4731 const struct ieee80211_he_operation *he_oper = NULL; 4732 struct ieee80211_supported_band *sband; 4733 struct cfg80211_chan_def chandef; 4734 int ret; 4735 u32 i; 4736 bool have_80mhz; 4737 4738 sband = local->hw.wiphy->bands[cbss->channel->band]; 4739 4740 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4741 IEEE80211_STA_DISABLE_80P80MHZ | 4742 IEEE80211_STA_DISABLE_160MHZ); 4743 4744 rcu_read_lock(); 4745 4746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4747 sband->ht_cap.ht_supported) { 4748 const u8 *ht_oper_ie, *ht_cap_ie; 4749 4750 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4751 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4752 ht_oper = (void *)(ht_oper_ie + 2); 4753 4754 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4755 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4756 ht_cap = (void *)(ht_cap_ie + 2); 4757 4758 if (!ht_cap) { 4759 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4760 ht_oper = NULL; 4761 } 4762 } 4763 4764 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4765 sband->vht_cap.vht_supported) { 4766 const u8 *vht_oper_ie, *vht_cap; 4767 4768 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4769 WLAN_EID_VHT_OPERATION); 4770 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4771 vht_oper = (void *)(vht_oper_ie + 2); 4772 if (vht_oper && !ht_oper) { 4773 vht_oper = NULL; 4774 sdata_info(sdata, 4775 "AP advertised VHT without HT, disabling both\n"); 4776 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4777 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4778 } 4779 4780 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4781 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4782 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4783 vht_oper = NULL; 4784 } 4785 } 4786 4787 if (!ieee80211_get_he_sta_cap(sband)) 4788 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4789 4790 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4791 const struct cfg80211_bss_ies *ies; 4792 const u8 *he_oper_ie; 4793 4794 ies = rcu_dereference(cbss->ies); 4795 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4796 ies->data, ies->len); 4797 if (he_oper_ie && 4798 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4799 he_oper = (void *)(he_oper_ie + 3); 4800 else 4801 he_oper = NULL; 4802 4803 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4804 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4805 } 4806 4807 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4808 have_80mhz = false; 4809 for (i = 0; i < sband->n_channels; i++) { 4810 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4811 IEEE80211_CHAN_NO_80MHZ)) 4812 continue; 4813 4814 have_80mhz = true; 4815 break; 4816 } 4817 4818 if (!have_80mhz) 4819 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4820 4821 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4822 cbss->channel, 4823 ht_oper, vht_oper, he_oper, 4824 &chandef, false); 4825 4826 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4827 local->rx_chains); 4828 4829 rcu_read_unlock(); 4830 4831 /* will change later if needed */ 4832 sdata->smps_mode = IEEE80211_SMPS_OFF; 4833 4834 mutex_lock(&local->mtx); 4835 /* 4836 * If this fails (possibly due to channel context sharing 4837 * on incompatible channels, e.g. 80+80 and 160 sharing the 4838 * same control channel) try to use a smaller bandwidth. 4839 */ 4840 ret = ieee80211_vif_use_channel(sdata, &chandef, 4841 IEEE80211_CHANCTX_SHARED); 4842 4843 /* don't downgrade for 5 and 10 MHz channels, though. */ 4844 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4845 chandef.width == NL80211_CHAN_WIDTH_10) 4846 goto out; 4847 4848 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4849 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4850 ret = ieee80211_vif_use_channel(sdata, &chandef, 4851 IEEE80211_CHANCTX_SHARED); 4852 } 4853 out: 4854 mutex_unlock(&local->mtx); 4855 return ret; 4856 } 4857 4858 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4859 u8 *dtim_count, u8 *dtim_period) 4860 { 4861 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4862 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4863 ies->len); 4864 const struct ieee80211_tim_ie *tim = NULL; 4865 const struct ieee80211_bssid_index *idx; 4866 bool valid = tim_ie && tim_ie[1] >= 2; 4867 4868 if (valid) 4869 tim = (void *)(tim_ie + 2); 4870 4871 if (dtim_count) 4872 *dtim_count = valid ? tim->dtim_count : 0; 4873 4874 if (dtim_period) 4875 *dtim_period = valid ? tim->dtim_period : 0; 4876 4877 /* Check if value is overridden by non-transmitted profile */ 4878 if (!idx_ie || idx_ie[1] < 3) 4879 return valid; 4880 4881 idx = (void *)(idx_ie + 2); 4882 4883 if (dtim_count) 4884 *dtim_count = idx->dtim_count; 4885 4886 if (dtim_period) 4887 *dtim_period = idx->dtim_period; 4888 4889 return true; 4890 } 4891 4892 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4893 struct cfg80211_bss *cbss, bool assoc, 4894 bool override) 4895 { 4896 struct ieee80211_local *local = sdata->local; 4897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4898 struct ieee80211_bss *bss = (void *)cbss->priv; 4899 struct sta_info *new_sta = NULL; 4900 struct ieee80211_supported_band *sband; 4901 bool have_sta = false; 4902 int err; 4903 4904 sband = local->hw.wiphy->bands[cbss->channel->band]; 4905 4906 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4907 return -EINVAL; 4908 4909 /* If a reconfig is happening, bail out */ 4910 if (local->in_reconfig) 4911 return -EBUSY; 4912 4913 if (assoc) { 4914 rcu_read_lock(); 4915 have_sta = sta_info_get(sdata, cbss->bssid); 4916 rcu_read_unlock(); 4917 } 4918 4919 if (!have_sta) { 4920 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4921 if (!new_sta) 4922 return -ENOMEM; 4923 } 4924 4925 /* 4926 * Set up the information for the new channel before setting the 4927 * new channel. We can't - completely race-free - change the basic 4928 * rates bitmap and the channel (sband) that it refers to, but if 4929 * we set it up before we at least avoid calling into the driver's 4930 * bss_info_changed() method with invalid information (since we do 4931 * call that from changing the channel - only for IDLE and perhaps 4932 * some others, but ...). 4933 * 4934 * So to avoid that, just set up all the new information before the 4935 * channel, but tell the driver to apply it only afterwards, since 4936 * it might need the new channel for that. 4937 */ 4938 if (new_sta) { 4939 u32 rates = 0, basic_rates = 0; 4940 bool have_higher_than_11mbit; 4941 int min_rate = INT_MAX, min_rate_index = -1; 4942 const struct cfg80211_bss_ies *ies; 4943 int shift = ieee80211_vif_get_shift(&sdata->vif); 4944 4945 ieee80211_get_rates(sband, bss->supp_rates, 4946 bss->supp_rates_len, 4947 &rates, &basic_rates, 4948 &have_higher_than_11mbit, 4949 &min_rate, &min_rate_index, 4950 shift); 4951 4952 /* 4953 * This used to be a workaround for basic rates missing 4954 * in the association response frame. Now that we no 4955 * longer use the basic rates from there, it probably 4956 * doesn't happen any more, but keep the workaround so 4957 * in case some *other* APs are buggy in different ways 4958 * we can connect -- with a warning. 4959 */ 4960 if (!basic_rates && min_rate_index >= 0) { 4961 sdata_info(sdata, 4962 "No basic rates, using min rate instead\n"); 4963 basic_rates = BIT(min_rate_index); 4964 } 4965 4966 if (rates) 4967 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4968 else 4969 sdata_info(sdata, 4970 "No rates found, keeping mandatory only\n"); 4971 4972 sdata->vif.bss_conf.basic_rates = basic_rates; 4973 4974 /* cf. IEEE 802.11 9.2.12 */ 4975 if (cbss->channel->band == NL80211_BAND_2GHZ && 4976 have_higher_than_11mbit) 4977 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4978 else 4979 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4980 4981 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4982 4983 /* set timing information */ 4984 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4985 rcu_read_lock(); 4986 ies = rcu_dereference(cbss->beacon_ies); 4987 if (ies) { 4988 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4989 sdata->vif.bss_conf.sync_device_ts = 4990 bss->device_ts_beacon; 4991 4992 ieee80211_get_dtim(ies, 4993 &sdata->vif.bss_conf.sync_dtim_count, 4994 NULL); 4995 } else if (!ieee80211_hw_check(&sdata->local->hw, 4996 TIMING_BEACON_ONLY)) { 4997 ies = rcu_dereference(cbss->proberesp_ies); 4998 /* must be non-NULL since beacon IEs were NULL */ 4999 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5000 sdata->vif.bss_conf.sync_device_ts = 5001 bss->device_ts_presp; 5002 sdata->vif.bss_conf.sync_dtim_count = 0; 5003 } else { 5004 sdata->vif.bss_conf.sync_tsf = 0; 5005 sdata->vif.bss_conf.sync_device_ts = 0; 5006 sdata->vif.bss_conf.sync_dtim_count = 0; 5007 } 5008 rcu_read_unlock(); 5009 } 5010 5011 if (new_sta || override) { 5012 err = ieee80211_prep_channel(sdata, cbss); 5013 if (err) { 5014 if (new_sta) 5015 sta_info_free(local, new_sta); 5016 return -EINVAL; 5017 } 5018 } 5019 5020 if (new_sta) { 5021 /* 5022 * tell driver about BSSID, basic rates and timing 5023 * this was set up above, before setting the channel 5024 */ 5025 ieee80211_bss_info_change_notify(sdata, 5026 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5027 BSS_CHANGED_BEACON_INT); 5028 5029 if (assoc) 5030 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5031 5032 err = sta_info_insert(new_sta); 5033 new_sta = NULL; 5034 if (err) { 5035 sdata_info(sdata, 5036 "failed to insert STA entry for the AP (error %d)\n", 5037 err); 5038 return err; 5039 } 5040 } else 5041 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5042 5043 /* Cancel scan to ensure that nothing interferes with connection */ 5044 if (local->scanning) 5045 ieee80211_scan_cancel(local); 5046 5047 return 0; 5048 } 5049 5050 /* config hooks */ 5051 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5052 struct cfg80211_auth_request *req) 5053 { 5054 struct ieee80211_local *local = sdata->local; 5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5056 struct ieee80211_mgd_auth_data *auth_data; 5057 u16 auth_alg; 5058 int err; 5059 bool cont_auth; 5060 5061 /* prepare auth data structure */ 5062 5063 switch (req->auth_type) { 5064 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5065 auth_alg = WLAN_AUTH_OPEN; 5066 break; 5067 case NL80211_AUTHTYPE_SHARED_KEY: 5068 if (fips_enabled) 5069 return -EOPNOTSUPP; 5070 auth_alg = WLAN_AUTH_SHARED_KEY; 5071 break; 5072 case NL80211_AUTHTYPE_FT: 5073 auth_alg = WLAN_AUTH_FT; 5074 break; 5075 case NL80211_AUTHTYPE_NETWORK_EAP: 5076 auth_alg = WLAN_AUTH_LEAP; 5077 break; 5078 case NL80211_AUTHTYPE_SAE: 5079 auth_alg = WLAN_AUTH_SAE; 5080 break; 5081 case NL80211_AUTHTYPE_FILS_SK: 5082 auth_alg = WLAN_AUTH_FILS_SK; 5083 break; 5084 case NL80211_AUTHTYPE_FILS_SK_PFS: 5085 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5086 break; 5087 case NL80211_AUTHTYPE_FILS_PK: 5088 auth_alg = WLAN_AUTH_FILS_PK; 5089 break; 5090 default: 5091 return -EOPNOTSUPP; 5092 } 5093 5094 if (ifmgd->assoc_data) 5095 return -EBUSY; 5096 5097 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5098 req->ie_len, GFP_KERNEL); 5099 if (!auth_data) 5100 return -ENOMEM; 5101 5102 auth_data->bss = req->bss; 5103 5104 if (req->auth_data_len >= 4) { 5105 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5106 __le16 *pos = (__le16 *) req->auth_data; 5107 5108 auth_data->sae_trans = le16_to_cpu(pos[0]); 5109 auth_data->sae_status = le16_to_cpu(pos[1]); 5110 } 5111 memcpy(auth_data->data, req->auth_data + 4, 5112 req->auth_data_len - 4); 5113 auth_data->data_len += req->auth_data_len - 4; 5114 } 5115 5116 /* Check if continuing authentication or trying to authenticate with the 5117 * same BSS that we were in the process of authenticating with and avoid 5118 * removal and re-addition of the STA entry in 5119 * ieee80211_prep_connection(). 5120 */ 5121 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5122 5123 if (req->ie && req->ie_len) { 5124 memcpy(&auth_data->data[auth_data->data_len], 5125 req->ie, req->ie_len); 5126 auth_data->data_len += req->ie_len; 5127 } 5128 5129 if (req->key && req->key_len) { 5130 auth_data->key_len = req->key_len; 5131 auth_data->key_idx = req->key_idx; 5132 memcpy(auth_data->key, req->key, req->key_len); 5133 } 5134 5135 auth_data->algorithm = auth_alg; 5136 5137 /* try to authenticate/probe */ 5138 5139 if (ifmgd->auth_data) { 5140 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5141 auth_data->peer_confirmed = 5142 ifmgd->auth_data->peer_confirmed; 5143 } 5144 ieee80211_destroy_auth_data(sdata, cont_auth); 5145 } 5146 5147 /* prep auth_data so we don't go into idle on disassoc */ 5148 ifmgd->auth_data = auth_data; 5149 5150 /* If this is continuation of an ongoing SAE authentication exchange 5151 * (i.e., request to send SAE Confirm) and the peer has already 5152 * confirmed, mark authentication completed since we are about to send 5153 * out SAE Confirm. 5154 */ 5155 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5156 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5157 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5158 5159 if (ifmgd->associated) { 5160 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5161 5162 sdata_info(sdata, 5163 "disconnect from AP %pM for new auth to %pM\n", 5164 ifmgd->associated->bssid, req->bss->bssid); 5165 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5166 WLAN_REASON_UNSPECIFIED, 5167 false, frame_buf); 5168 5169 ieee80211_report_disconnect(sdata, frame_buf, 5170 sizeof(frame_buf), true, 5171 WLAN_REASON_UNSPECIFIED); 5172 } 5173 5174 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5175 5176 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5177 if (err) 5178 goto err_clear; 5179 5180 err = ieee80211_auth(sdata); 5181 if (err) { 5182 sta_info_destroy_addr(sdata, req->bss->bssid); 5183 goto err_clear; 5184 } 5185 5186 /* hold our own reference */ 5187 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5188 return 0; 5189 5190 err_clear: 5191 eth_zero_addr(ifmgd->bssid); 5192 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5193 ifmgd->auth_data = NULL; 5194 mutex_lock(&sdata->local->mtx); 5195 ieee80211_vif_release_channel(sdata); 5196 mutex_unlock(&sdata->local->mtx); 5197 kfree(auth_data); 5198 return err; 5199 } 5200 5201 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5202 struct cfg80211_assoc_request *req) 5203 { 5204 struct ieee80211_local *local = sdata->local; 5205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5206 struct ieee80211_bss *bss = (void *)req->bss->priv; 5207 struct ieee80211_mgd_assoc_data *assoc_data; 5208 const struct cfg80211_bss_ies *beacon_ies; 5209 struct ieee80211_supported_band *sband; 5210 const u8 *ssidie, *ht_ie, *vht_ie; 5211 int i, err; 5212 bool override = false; 5213 5214 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5215 if (!assoc_data) 5216 return -ENOMEM; 5217 5218 rcu_read_lock(); 5219 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5220 if (!ssidie) { 5221 rcu_read_unlock(); 5222 kfree(assoc_data); 5223 return -EINVAL; 5224 } 5225 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5226 assoc_data->ssid_len = ssidie[1]; 5227 rcu_read_unlock(); 5228 5229 if (ifmgd->associated) { 5230 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5231 5232 sdata_info(sdata, 5233 "disconnect from AP %pM for new assoc to %pM\n", 5234 ifmgd->associated->bssid, req->bss->bssid); 5235 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5236 WLAN_REASON_UNSPECIFIED, 5237 false, frame_buf); 5238 5239 ieee80211_report_disconnect(sdata, frame_buf, 5240 sizeof(frame_buf), true, 5241 WLAN_REASON_UNSPECIFIED); 5242 } 5243 5244 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5245 err = -EBUSY; 5246 goto err_free; 5247 } 5248 5249 if (ifmgd->assoc_data) { 5250 err = -EBUSY; 5251 goto err_free; 5252 } 5253 5254 if (ifmgd->auth_data) { 5255 bool match; 5256 5257 /* keep sta info, bssid if matching */ 5258 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5259 ieee80211_destroy_auth_data(sdata, match); 5260 } 5261 5262 /* prepare assoc data */ 5263 5264 ifmgd->beacon_crc_valid = false; 5265 5266 assoc_data->wmm = bss->wmm_used && 5267 (local->hw.queues >= IEEE80211_NUM_ACS); 5268 5269 /* 5270 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5271 * We still associate in non-HT mode (11a/b/g) if any one of these 5272 * ciphers is configured as pairwise. 5273 * We can set this to true for non-11n hardware, that'll be checked 5274 * separately along with the peer capabilities. 5275 */ 5276 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5277 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5278 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5279 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5280 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5281 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5282 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5283 netdev_info(sdata->dev, 5284 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5285 } 5286 } 5287 5288 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5289 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5290 if (!sband->ht_cap.ht_supported || 5291 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5292 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5293 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5294 if (!bss->wmm_used && 5295 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5296 netdev_info(sdata->dev, 5297 "disabling HT as WMM/QoS is not supported by the AP\n"); 5298 } 5299 5300 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5301 if (!sband->vht_cap.vht_supported || 5302 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5303 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5304 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5305 if (!bss->wmm_used && 5306 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5307 netdev_info(sdata->dev, 5308 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5309 } 5310 5311 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5312 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5313 sizeof(ifmgd->ht_capa_mask)); 5314 5315 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5316 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5317 sizeof(ifmgd->vht_capa_mask)); 5318 5319 if (req->ie && req->ie_len) { 5320 memcpy(assoc_data->ie, req->ie, req->ie_len); 5321 assoc_data->ie_len = req->ie_len; 5322 } 5323 5324 if (req->fils_kek) { 5325 /* should already be checked in cfg80211 - so warn */ 5326 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5327 err = -EINVAL; 5328 goto err_free; 5329 } 5330 memcpy(assoc_data->fils_kek, req->fils_kek, 5331 req->fils_kek_len); 5332 assoc_data->fils_kek_len = req->fils_kek_len; 5333 } 5334 5335 if (req->fils_nonces) 5336 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5337 2 * FILS_NONCE_LEN); 5338 5339 assoc_data->bss = req->bss; 5340 5341 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5342 if (ifmgd->powersave) 5343 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5344 else 5345 sdata->smps_mode = IEEE80211_SMPS_OFF; 5346 } else 5347 sdata->smps_mode = ifmgd->req_smps; 5348 5349 assoc_data->capability = req->bss->capability; 5350 assoc_data->supp_rates = bss->supp_rates; 5351 assoc_data->supp_rates_len = bss->supp_rates_len; 5352 5353 rcu_read_lock(); 5354 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5355 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5356 assoc_data->ap_ht_param = 5357 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5358 else 5359 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5360 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5361 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5362 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5363 sizeof(struct ieee80211_vht_cap)); 5364 else 5365 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5366 rcu_read_unlock(); 5367 5368 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5369 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5370 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5371 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5372 5373 if (bss->wmm_used && bss->uapsd_supported && 5374 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5375 assoc_data->uapsd = true; 5376 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5377 } else { 5378 assoc_data->uapsd = false; 5379 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5380 } 5381 5382 if (req->prev_bssid) 5383 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5384 5385 if (req->use_mfp) { 5386 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5387 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5388 } else { 5389 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5390 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5391 } 5392 5393 if (req->flags & ASSOC_REQ_USE_RRM) 5394 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5395 else 5396 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5397 5398 if (req->crypto.control_port) 5399 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5400 else 5401 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5402 5403 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5404 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5405 sdata->control_port_over_nl80211 = 5406 req->crypto.control_port_over_nl80211; 5407 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5408 sdata->vif.type); 5409 5410 /* kick off associate process */ 5411 5412 ifmgd->assoc_data = assoc_data; 5413 ifmgd->dtim_period = 0; 5414 ifmgd->have_beacon = false; 5415 5416 /* override HT/VHT configuration only if the AP and we support it */ 5417 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5418 struct ieee80211_sta_ht_cap sta_ht_cap; 5419 5420 if (req->flags & ASSOC_REQ_DISABLE_HT) 5421 override = true; 5422 5423 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5424 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5425 5426 /* check for 40 MHz disable override */ 5427 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5428 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5429 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5430 override = true; 5431 5432 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5433 req->flags & ASSOC_REQ_DISABLE_VHT) 5434 override = true; 5435 } 5436 5437 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5438 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5439 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5440 } 5441 5442 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5443 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5444 5445 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5446 if (err) 5447 goto err_clear; 5448 5449 rcu_read_lock(); 5450 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5451 5452 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5453 !beacon_ies) { 5454 /* 5455 * Wait up to one beacon interval ... 5456 * should this be more if we miss one? 5457 */ 5458 sdata_info(sdata, "waiting for beacon from %pM\n", 5459 ifmgd->bssid); 5460 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5461 assoc_data->timeout_started = true; 5462 assoc_data->need_beacon = true; 5463 } else if (beacon_ies) { 5464 const u8 *ie; 5465 u8 dtim_count = 0; 5466 5467 ieee80211_get_dtim(beacon_ies, &dtim_count, 5468 &ifmgd->dtim_period); 5469 5470 ifmgd->have_beacon = true; 5471 assoc_data->timeout = jiffies; 5472 assoc_data->timeout_started = true; 5473 5474 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5475 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5476 sdata->vif.bss_conf.sync_device_ts = 5477 bss->device_ts_beacon; 5478 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5479 } 5480 5481 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5482 beacon_ies->data, beacon_ies->len); 5483 if (ie && ie[1] >= 3) 5484 sdata->vif.bss_conf.profile_periodicity = ie[4]; 5485 5486 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, 5487 beacon_ies->data, beacon_ies->len); 5488 if (ie && ie[1] >= 11 && 5489 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5490 sdata->vif.bss_conf.ema_ap = true; 5491 } else { 5492 assoc_data->timeout = jiffies; 5493 assoc_data->timeout_started = true; 5494 } 5495 rcu_read_unlock(); 5496 5497 run_again(sdata, assoc_data->timeout); 5498 5499 if (bss->corrupt_data) { 5500 char *corrupt_type = "data"; 5501 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5502 if (bss->corrupt_data & 5503 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5504 corrupt_type = "beacon and probe response"; 5505 else 5506 corrupt_type = "beacon"; 5507 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5508 corrupt_type = "probe response"; 5509 sdata_info(sdata, "associating with AP with corrupt %s\n", 5510 corrupt_type); 5511 } 5512 5513 return 0; 5514 err_clear: 5515 eth_zero_addr(ifmgd->bssid); 5516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5517 ifmgd->assoc_data = NULL; 5518 err_free: 5519 kfree(assoc_data); 5520 return err; 5521 } 5522 5523 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5524 struct cfg80211_deauth_request *req) 5525 { 5526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5527 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5528 bool tx = !req->local_state_change; 5529 5530 if (ifmgd->auth_data && 5531 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5532 sdata_info(sdata, 5533 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5534 req->bssid, req->reason_code, 5535 ieee80211_get_reason_code_string(req->reason_code)); 5536 5537 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5538 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5539 IEEE80211_STYPE_DEAUTH, 5540 req->reason_code, tx, 5541 frame_buf); 5542 ieee80211_destroy_auth_data(sdata, false); 5543 ieee80211_report_disconnect(sdata, frame_buf, 5544 sizeof(frame_buf), true, 5545 req->reason_code); 5546 5547 return 0; 5548 } 5549 5550 if (ifmgd->assoc_data && 5551 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5552 sdata_info(sdata, 5553 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5554 req->bssid, req->reason_code, 5555 ieee80211_get_reason_code_string(req->reason_code)); 5556 5557 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5558 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5559 IEEE80211_STYPE_DEAUTH, 5560 req->reason_code, tx, 5561 frame_buf); 5562 ieee80211_destroy_assoc_data(sdata, false, true); 5563 ieee80211_report_disconnect(sdata, frame_buf, 5564 sizeof(frame_buf), true, 5565 req->reason_code); 5566 return 0; 5567 } 5568 5569 if (ifmgd->associated && 5570 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5571 sdata_info(sdata, 5572 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5573 req->bssid, req->reason_code, 5574 ieee80211_get_reason_code_string(req->reason_code)); 5575 5576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5577 req->reason_code, tx, frame_buf); 5578 ieee80211_report_disconnect(sdata, frame_buf, 5579 sizeof(frame_buf), true, 5580 req->reason_code); 5581 return 0; 5582 } 5583 5584 return -ENOTCONN; 5585 } 5586 5587 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5588 struct cfg80211_disassoc_request *req) 5589 { 5590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5591 u8 bssid[ETH_ALEN]; 5592 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5593 5594 /* 5595 * cfg80211 should catch this ... but it's racy since 5596 * we can receive a disassoc frame, process it, hand it 5597 * to cfg80211 while that's in a locked section already 5598 * trying to tell us that the user wants to disconnect. 5599 */ 5600 if (ifmgd->associated != req->bss) 5601 return -ENOLINK; 5602 5603 sdata_info(sdata, 5604 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5605 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5606 5607 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5609 req->reason_code, !req->local_state_change, 5610 frame_buf); 5611 5612 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5613 req->reason_code); 5614 5615 return 0; 5616 } 5617 5618 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5619 { 5620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5621 5622 /* 5623 * Make sure some work items will not run after this, 5624 * they will not do anything but might not have been 5625 * cancelled when disconnecting. 5626 */ 5627 cancel_work_sync(&ifmgd->monitor_work); 5628 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5629 cancel_work_sync(&ifmgd->request_smps_work); 5630 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5631 cancel_work_sync(&ifmgd->chswitch_work); 5632 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5633 5634 sdata_lock(sdata); 5635 if (ifmgd->assoc_data) { 5636 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5637 ieee80211_destroy_assoc_data(sdata, false, false); 5638 cfg80211_assoc_timeout(sdata->dev, bss); 5639 } 5640 if (ifmgd->auth_data) 5641 ieee80211_destroy_auth_data(sdata, false); 5642 spin_lock_bh(&ifmgd->teardown_lock); 5643 if (ifmgd->teardown_skb) { 5644 kfree_skb(ifmgd->teardown_skb); 5645 ifmgd->teardown_skb = NULL; 5646 ifmgd->orig_teardown_skb = NULL; 5647 } 5648 kfree(ifmgd->assoc_req_ies); 5649 ifmgd->assoc_req_ies = NULL; 5650 ifmgd->assoc_req_ies_len = 0; 5651 spin_unlock_bh(&ifmgd->teardown_lock); 5652 del_timer_sync(&ifmgd->timer); 5653 sdata_unlock(sdata); 5654 } 5655 5656 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5657 enum nl80211_cqm_rssi_threshold_event rssi_event, 5658 s32 rssi_level, 5659 gfp_t gfp) 5660 { 5661 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5662 5663 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5664 5665 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5666 } 5667 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5668 5669 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5670 { 5671 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5672 5673 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5674 5675 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5676 } 5677 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5678