1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2020 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 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 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 166 if (!ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | 168 IEEE80211_STA_DISABLE_VHT | 169 IEEE80211_STA_DISABLE_HE; 170 goto out; 171 } 172 173 chandef->width = NL80211_CHAN_WIDTH_20; 174 175 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 176 channel->band); 177 /* check that channel matches the right operating channel */ 178 if (!tracking && channel->center_freq != ht_cfreq) { 179 /* 180 * It's possible that some APs are confused here; 181 * Netgear WNDR3700 sometimes reports 4 higher than 182 * the actual channel in association responses, but 183 * since we look at probe response/beacon data here 184 * it should be OK. 185 */ 186 sdata_info(sdata, 187 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 188 channel->center_freq, ht_cfreq, 189 ht_oper->primary_chan, channel->band); 190 ret = IEEE80211_STA_DISABLE_HT | 191 IEEE80211_STA_DISABLE_VHT | 192 IEEE80211_STA_DISABLE_HE; 193 goto out; 194 } 195 196 /* check 40 MHz support, if we have it */ 197 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 198 ieee80211_chandef_ht_oper(ht_oper, chandef); 199 } else { 200 /* 40 MHz (and 80 MHz) must be supported for VHT */ 201 ret = IEEE80211_STA_DISABLE_VHT; 202 /* also mark 40 MHz disabled */ 203 ret |= IEEE80211_STA_DISABLE_40MHZ; 204 goto out; 205 } 206 207 if (!vht_oper || !sband->vht_cap.vht_supported) { 208 ret = IEEE80211_STA_DISABLE_VHT; 209 goto out; 210 } 211 212 vht_chandef = *chandef; 213 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 214 (le32_to_cpu(he_oper->he_oper_params) & 215 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 216 struct ieee80211_vht_operation he_oper_vht_cap; 217 218 /* 219 * Set only first 3 bytes (other 2 aren't used in 220 * ieee80211_chandef_vht_oper() anyway) 221 */ 222 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 223 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 224 225 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 226 &he_oper_vht_cap, ht_oper, 227 &vht_chandef)) { 228 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 229 sdata_info(sdata, 230 "HE AP VHT information is invalid, disable HE\n"); 231 ret = IEEE80211_STA_DISABLE_HE; 232 goto out; 233 } 234 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 235 ht_oper, &vht_chandef)) { 236 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 237 sdata_info(sdata, 238 "AP VHT information is invalid, disable VHT\n"); 239 ret = IEEE80211_STA_DISABLE_VHT; 240 goto out; 241 } 242 243 if (!cfg80211_chandef_valid(&vht_chandef)) { 244 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 245 sdata_info(sdata, 246 "AP VHT information is invalid, disable VHT\n"); 247 ret = IEEE80211_STA_DISABLE_VHT; 248 goto out; 249 } 250 251 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 252 ret = 0; 253 goto out; 254 } 255 256 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 258 sdata_info(sdata, 259 "AP VHT information doesn't match HT, disable VHT\n"); 260 ret = IEEE80211_STA_DISABLE_VHT; 261 goto out; 262 } 263 264 *chandef = vht_chandef; 265 266 ret = 0; 267 268 out: 269 /* 270 * When tracking the current AP, don't do any further checks if the 271 * new chandef is identical to the one we're currently using for the 272 * connection. This keeps us from playing ping-pong with regulatory, 273 * without it the following can happen (for example): 274 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 275 * - AP advertises regdom US 276 * - CRDA loads regdom US with 80 MHz prohibited (old database) 277 * - the code below detects an unsupported channel, downgrades, and 278 * we disconnect from the AP in the caller 279 * - disconnect causes CRDA to reload world regdomain and the game 280 * starts anew. 281 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 282 * 283 * It seems possible that there are still scenarios with CSA or real 284 * bandwidth changes where a this could happen, but those cases are 285 * less common and wouldn't completely prevent using the AP. 286 */ 287 if (tracking && 288 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 289 return ret; 290 291 /* don't print the message below for VHT mismatch if VHT is disabled */ 292 if (ret & IEEE80211_STA_DISABLE_VHT) 293 vht_chandef = *chandef; 294 295 /* 296 * Ignore the DISABLED flag when we're already connected and only 297 * tracking the APs beacon for bandwidth changes - otherwise we 298 * might get disconnected here if we connect to an AP, update our 299 * regulatory information based on the AP's country IE and the 300 * information we have is wrong/outdated and disables the channel 301 * that we're actually using for the connection to the AP. 302 */ 303 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 304 tracking ? 0 : 305 IEEE80211_CHAN_DISABLED)) { 306 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 307 ret = IEEE80211_STA_DISABLE_HT | 308 IEEE80211_STA_DISABLE_VHT | 309 IEEE80211_STA_DISABLE_HE; 310 break; 311 } 312 313 ret |= ieee80211_chandef_downgrade(chandef); 314 } 315 316 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 317 IEEE80211_CHAN_NO_HE)) 318 ret |= IEEE80211_STA_DISABLE_HE; 319 320 if (chandef->width != vht_chandef.width && !tracking) 321 sdata_info(sdata, 322 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 323 324 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 325 return ret; 326 } 327 328 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 329 struct sta_info *sta, 330 const struct ieee80211_ht_cap *ht_cap, 331 const struct ieee80211_ht_operation *ht_oper, 332 const struct ieee80211_vht_operation *vht_oper, 333 const struct ieee80211_he_operation *he_oper, 334 const u8 *bssid, u32 *changed) 335 { 336 struct ieee80211_local *local = sdata->local; 337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 338 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 339 struct ieee80211_supported_band *sband = 340 local->hw.wiphy->bands[chan->band]; 341 struct cfg80211_chan_def chandef; 342 u16 ht_opmode; 343 u32 flags; 344 enum ieee80211_sta_rx_bandwidth new_sta_bw; 345 int ret; 346 347 /* if HT was/is disabled, don't track any bandwidth changes */ 348 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 349 return 0; 350 351 /* don't check VHT if we associated as non-VHT station */ 352 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 353 vht_oper = NULL; 354 355 /* don't check HE if we associated as non-HE station */ 356 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 357 !ieee80211_get_he_sta_cap(sband)) 358 he_oper = NULL; 359 360 if (WARN_ON_ONCE(!sta)) 361 return -EINVAL; 362 363 /* 364 * if bss configuration changed store the new one - 365 * this may be applicable even if channel is identical 366 */ 367 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 369 *changed |= BSS_CHANGED_HT; 370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 371 } 372 373 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 374 flags = ieee80211_determine_chantype(sdata, sband, chan, 375 ht_oper, vht_oper, he_oper, 376 &chandef, true); 377 378 /* 379 * Downgrade the new channel if we associated with restricted 380 * capabilities. For example, if we associated as a 20 MHz STA 381 * to a 40 MHz AP (due to regulatory, capabilities or config 382 * reasons) then switching to a 40 MHz channel now won't do us 383 * any good -- we couldn't use it with the AP. 384 */ 385 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 386 chandef.width == NL80211_CHAN_WIDTH_80P80) 387 flags |= ieee80211_chandef_downgrade(&chandef); 388 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 389 chandef.width == NL80211_CHAN_WIDTH_160) 390 flags |= ieee80211_chandef_downgrade(&chandef); 391 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 392 chandef.width > NL80211_CHAN_WIDTH_20) 393 flags |= ieee80211_chandef_downgrade(&chandef); 394 395 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 396 return 0; 397 398 sdata_info(sdata, 399 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 400 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 401 chandef.center_freq1, chandef.center_freq2); 402 403 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 404 IEEE80211_STA_DISABLE_VHT | 405 IEEE80211_STA_DISABLE_HE | 406 IEEE80211_STA_DISABLE_40MHZ | 407 IEEE80211_STA_DISABLE_80P80MHZ | 408 IEEE80211_STA_DISABLE_160MHZ)) || 409 !cfg80211_chandef_valid(&chandef)) { 410 sdata_info(sdata, 411 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 412 ifmgd->bssid); 413 return -EINVAL; 414 } 415 416 switch (chandef.width) { 417 case NL80211_CHAN_WIDTH_20_NOHT: 418 case NL80211_CHAN_WIDTH_20: 419 new_sta_bw = IEEE80211_STA_RX_BW_20; 420 break; 421 case NL80211_CHAN_WIDTH_40: 422 new_sta_bw = IEEE80211_STA_RX_BW_40; 423 break; 424 case NL80211_CHAN_WIDTH_80: 425 new_sta_bw = IEEE80211_STA_RX_BW_80; 426 break; 427 case NL80211_CHAN_WIDTH_80P80: 428 case NL80211_CHAN_WIDTH_160: 429 new_sta_bw = IEEE80211_STA_RX_BW_160; 430 break; 431 default: 432 return -EINVAL; 433 } 434 435 if (new_sta_bw > sta->cur_max_bandwidth) 436 new_sta_bw = sta->cur_max_bandwidth; 437 438 if (new_sta_bw < sta->sta.bandwidth) { 439 sta->sta.bandwidth = new_sta_bw; 440 rate_control_rate_update(local, sband, sta, 441 IEEE80211_RC_BW_CHANGED); 442 } 443 444 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 445 if (ret) { 446 sdata_info(sdata, 447 "AP %pM changed bandwidth to incompatible one - disconnect\n", 448 ifmgd->bssid); 449 return ret; 450 } 451 452 if (new_sta_bw > sta->sta.bandwidth) { 453 sta->sta.bandwidth = new_sta_bw; 454 rate_control_rate_update(local, sband, sta, 455 IEEE80211_RC_BW_CHANGED); 456 } 457 458 return 0; 459 } 460 461 /* frame sending functions */ 462 463 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 464 struct sk_buff *skb, u8 ap_ht_param, 465 struct ieee80211_supported_band *sband, 466 struct ieee80211_channel *channel, 467 enum ieee80211_smps_mode smps) 468 { 469 u8 *pos; 470 u32 flags = channel->flags; 471 u16 cap; 472 struct ieee80211_sta_ht_cap ht_cap; 473 474 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 475 476 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 477 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 478 479 /* determine capability flags */ 480 cap = ht_cap.cap; 481 482 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 483 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 484 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 486 cap &= ~IEEE80211_HT_CAP_SGI_40; 487 } 488 break; 489 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 490 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 491 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 492 cap &= ~IEEE80211_HT_CAP_SGI_40; 493 } 494 break; 495 } 496 497 /* 498 * If 40 MHz was disabled associate as though we weren't 499 * capable of 40 MHz -- some broken APs will never fall 500 * back to trying to transmit in 20 MHz. 501 */ 502 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 503 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 504 cap &= ~IEEE80211_HT_CAP_SGI_40; 505 } 506 507 /* set SM PS mode properly */ 508 cap &= ~IEEE80211_HT_CAP_SM_PS; 509 switch (smps) { 510 case IEEE80211_SMPS_AUTOMATIC: 511 case IEEE80211_SMPS_NUM_MODES: 512 WARN_ON(1); 513 /* fall through */ 514 case IEEE80211_SMPS_OFF: 515 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 516 IEEE80211_HT_CAP_SM_PS_SHIFT; 517 break; 518 case IEEE80211_SMPS_STATIC: 519 cap |= WLAN_HT_CAP_SM_PS_STATIC << 520 IEEE80211_HT_CAP_SM_PS_SHIFT; 521 break; 522 case IEEE80211_SMPS_DYNAMIC: 523 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 524 IEEE80211_HT_CAP_SM_PS_SHIFT; 525 break; 526 } 527 528 /* reserve and fill IE */ 529 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 530 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 531 } 532 533 /* This function determines vht capability flags for the association 534 * and builds the IE. 535 * Note - the function may set the owner of the MU-MIMO capability 536 */ 537 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 538 struct sk_buff *skb, 539 struct ieee80211_supported_band *sband, 540 struct ieee80211_vht_cap *ap_vht_cap) 541 { 542 struct ieee80211_local *local = sdata->local; 543 u8 *pos; 544 u32 cap; 545 struct ieee80211_sta_vht_cap vht_cap; 546 u32 mask, ap_bf_sts, our_bf_sts; 547 548 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 549 550 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 551 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 552 553 /* determine capability flags */ 554 cap = vht_cap.cap; 555 556 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 557 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 558 559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 560 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 561 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 562 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 563 } 564 565 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 566 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 567 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 568 } 569 570 /* 571 * Some APs apparently get confused if our capabilities are better 572 * than theirs, so restrict what we advertise in the assoc request. 573 */ 574 if (!(ap_vht_cap->vht_cap_info & 575 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 576 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 577 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 578 else if (!(ap_vht_cap->vht_cap_info & 579 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 580 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 581 582 /* 583 * If some other vif is using the MU-MIMO capablity we cannot associate 584 * using MU-MIMO - this will lead to contradictions in the group-id 585 * mechanism. 586 * Ownership is defined since association request, in order to avoid 587 * simultaneous associations with MU-MIMO. 588 */ 589 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 590 bool disable_mu_mimo = false; 591 struct ieee80211_sub_if_data *other; 592 593 list_for_each_entry_rcu(other, &local->interfaces, list) { 594 if (other->vif.mu_mimo_owner) { 595 disable_mu_mimo = true; 596 break; 597 } 598 } 599 if (disable_mu_mimo) 600 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 601 else 602 sdata->vif.mu_mimo_owner = true; 603 } 604 605 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 606 607 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 608 our_bf_sts = cap & mask; 609 610 if (ap_bf_sts < our_bf_sts) { 611 cap &= ~mask; 612 cap |= ap_bf_sts; 613 } 614 615 /* reserve and fill IE */ 616 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 617 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 618 } 619 620 /* This function determines HE capability flags for the association 621 * and builds the IE. 622 */ 623 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 624 struct sk_buff *skb, 625 struct ieee80211_supported_band *sband) 626 { 627 u8 *pos; 628 const struct ieee80211_sta_he_cap *he_cap = NULL; 629 struct ieee80211_chanctx_conf *chanctx_conf; 630 u8 he_cap_size; 631 bool reg_cap = false; 632 633 rcu_read_lock(); 634 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 635 if (!WARN_ON_ONCE(!chanctx_conf)) 636 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 637 &chanctx_conf->def, 638 IEEE80211_CHAN_NO_HE); 639 640 rcu_read_unlock(); 641 642 he_cap = ieee80211_get_he_sta_cap(sband); 643 if (!he_cap || !reg_cap) 644 return; 645 646 /* 647 * TODO: the 1 added is because this temporarily is under the EXTENSION 648 * IE. Get rid of it when it moves. 649 */ 650 he_cap_size = 651 2 + 1 + sizeof(he_cap->he_cap_elem) + 652 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 653 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 654 he_cap->he_cap_elem.phy_cap_info); 655 pos = skb_put(skb, he_cap_size); 656 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 657 } 658 659 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 660 { 661 struct ieee80211_local *local = sdata->local; 662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 663 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 664 struct sk_buff *skb; 665 struct ieee80211_mgmt *mgmt; 666 u8 *pos, qos_info, *ie_start; 667 size_t offset = 0, noffset; 668 int i, count, rates_len, supp_rates_len, shift; 669 u16 capab; 670 struct ieee80211_supported_band *sband; 671 struct ieee80211_chanctx_conf *chanctx_conf; 672 struct ieee80211_channel *chan; 673 u32 rates = 0; 674 struct element *ext_capa = NULL; 675 676 /* we know it's writable, cast away the const */ 677 if (assoc_data->ie_len) 678 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 679 assoc_data->ie, 680 assoc_data->ie_len); 681 682 sdata_assert_lock(sdata); 683 684 rcu_read_lock(); 685 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 686 if (WARN_ON(!chanctx_conf)) { 687 rcu_read_unlock(); 688 return; 689 } 690 chan = chanctx_conf->def.chan; 691 rcu_read_unlock(); 692 sband = local->hw.wiphy->bands[chan->band]; 693 shift = ieee80211_vif_get_shift(&sdata->vif); 694 695 if (assoc_data->supp_rates_len) { 696 /* 697 * Get all rates supported by the device and the AP as 698 * some APs don't like getting a superset of their rates 699 * in the association request (e.g. D-Link DAP 1353 in 700 * b-only mode)... 701 */ 702 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 703 assoc_data->supp_rates, 704 assoc_data->supp_rates_len, 705 &rates); 706 } else { 707 /* 708 * In case AP not provide any supported rates information 709 * before association, we send information element(s) with 710 * all rates that we support. 711 */ 712 rates_len = 0; 713 for (i = 0; i < sband->n_bitrates; i++) { 714 rates |= BIT(i); 715 rates_len++; 716 } 717 } 718 719 skb = alloc_skb(local->hw.extra_tx_headroom + 720 sizeof(*mgmt) + /* bit too much but doesn't matter */ 721 2 + assoc_data->ssid_len + /* SSID */ 722 4 + rates_len + /* (extended) rates */ 723 4 + /* power capability */ 724 2 + 2 * sband->n_channels + /* supported channels */ 725 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 726 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 727 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 728 sizeof(struct ieee80211_he_mcs_nss_supp) + 729 IEEE80211_HE_PPE_THRES_MAX_LEN + 730 assoc_data->ie_len + /* extra IEs */ 731 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 732 9, /* WMM */ 733 GFP_KERNEL); 734 if (!skb) 735 return; 736 737 skb_reserve(skb, local->hw.extra_tx_headroom); 738 739 capab = WLAN_CAPABILITY_ESS; 740 741 if (sband->band == NL80211_BAND_2GHZ) { 742 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 743 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 744 } 745 746 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 747 capab |= WLAN_CAPABILITY_PRIVACY; 748 749 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 750 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 751 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 752 753 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 754 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 755 756 mgmt = skb_put_zero(skb, 24); 757 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 758 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 759 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 760 761 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 762 skb_put(skb, 10); 763 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 764 IEEE80211_STYPE_REASSOC_REQ); 765 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 766 mgmt->u.reassoc_req.listen_interval = 767 cpu_to_le16(local->hw.conf.listen_interval); 768 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 769 ETH_ALEN); 770 } else { 771 skb_put(skb, 4); 772 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 773 IEEE80211_STYPE_ASSOC_REQ); 774 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 775 mgmt->u.assoc_req.listen_interval = 776 cpu_to_le16(local->hw.conf.listen_interval); 777 } 778 779 /* SSID */ 780 pos = skb_put(skb, 2 + assoc_data->ssid_len); 781 ie_start = pos; 782 *pos++ = WLAN_EID_SSID; 783 *pos++ = assoc_data->ssid_len; 784 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 785 786 /* add all rates which were marked to be used above */ 787 supp_rates_len = rates_len; 788 if (supp_rates_len > 8) 789 supp_rates_len = 8; 790 791 pos = skb_put(skb, supp_rates_len + 2); 792 *pos++ = WLAN_EID_SUPP_RATES; 793 *pos++ = supp_rates_len; 794 795 count = 0; 796 for (i = 0; i < sband->n_bitrates; i++) { 797 if (BIT(i) & rates) { 798 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 799 5 * (1 << shift)); 800 *pos++ = (u8) rate; 801 if (++count == 8) 802 break; 803 } 804 } 805 806 if (rates_len > count) { 807 pos = skb_put(skb, rates_len - count + 2); 808 *pos++ = WLAN_EID_EXT_SUPP_RATES; 809 *pos++ = rates_len - count; 810 811 for (i++; i < sband->n_bitrates; i++) { 812 if (BIT(i) & rates) { 813 int rate; 814 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 815 5 * (1 << shift)); 816 *pos++ = (u8) rate; 817 } 818 } 819 } 820 821 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 822 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 823 pos = skb_put(skb, 4); 824 *pos++ = WLAN_EID_PWR_CAPABILITY; 825 *pos++ = 2; 826 *pos++ = 0; /* min tx power */ 827 /* max tx power */ 828 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 829 } 830 831 /* 832 * Per spec, we shouldn't include the list of channels if we advertise 833 * support for extended channel switching, but we've always done that; 834 * (for now?) apply this restriction only on the (new) 6 GHz band. 835 */ 836 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 837 (sband->band != NL80211_BAND_6GHZ || 838 !ext_capa || ext_capa->datalen < 1 || 839 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 840 /* TODO: get this in reg domain format */ 841 pos = skb_put(skb, 2 * sband->n_channels + 2); 842 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 843 *pos++ = 2 * sband->n_channels; 844 for (i = 0; i < sband->n_channels; i++) { 845 *pos++ = ieee80211_frequency_to_channel( 846 sband->channels[i].center_freq); 847 *pos++ = 1; /* one channel in the subband*/ 848 } 849 } 850 851 /* Set MBSSID support for HE AP if needed */ 852 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 853 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 854 ext_capa && ext_capa->datalen >= 3) 855 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 856 857 /* if present, add any custom IEs that go before HT */ 858 if (assoc_data->ie_len) { 859 static const u8 before_ht[] = { 860 WLAN_EID_SSID, 861 WLAN_EID_SUPP_RATES, 862 WLAN_EID_EXT_SUPP_RATES, 863 WLAN_EID_PWR_CAPABILITY, 864 WLAN_EID_SUPPORTED_CHANNELS, 865 WLAN_EID_RSN, 866 WLAN_EID_QOS_CAPA, 867 WLAN_EID_RRM_ENABLED_CAPABILITIES, 868 WLAN_EID_MOBILITY_DOMAIN, 869 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 870 WLAN_EID_RIC_DATA, /* reassoc only */ 871 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 872 }; 873 static const u8 after_ric[] = { 874 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 875 WLAN_EID_HT_CAPABILITY, 876 WLAN_EID_BSS_COEX_2040, 877 /* luckily this is almost always there */ 878 WLAN_EID_EXT_CAPABILITY, 879 WLAN_EID_QOS_TRAFFIC_CAPA, 880 WLAN_EID_TIM_BCAST_REQ, 881 WLAN_EID_INTERWORKING, 882 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 883 WLAN_EID_VHT_CAPABILITY, 884 WLAN_EID_OPMODE_NOTIF, 885 }; 886 887 noffset = ieee80211_ie_split_ric(assoc_data->ie, 888 assoc_data->ie_len, 889 before_ht, 890 ARRAY_SIZE(before_ht), 891 after_ric, 892 ARRAY_SIZE(after_ric), 893 offset); 894 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 895 offset = noffset; 896 } 897 898 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 899 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 900 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 901 902 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 903 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 904 sband, chan, sdata->smps_mode); 905 906 /* if present, add any custom IEs that go before VHT */ 907 if (assoc_data->ie_len) { 908 static const u8 before_vht[] = { 909 /* 910 * no need to list the ones split off before HT 911 * or generated here 912 */ 913 WLAN_EID_BSS_COEX_2040, 914 WLAN_EID_EXT_CAPABILITY, 915 WLAN_EID_QOS_TRAFFIC_CAPA, 916 WLAN_EID_TIM_BCAST_REQ, 917 WLAN_EID_INTERWORKING, 918 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 919 }; 920 921 /* RIC already taken above, so no need to handle here anymore */ 922 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 923 before_vht, ARRAY_SIZE(before_vht), 924 offset); 925 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 926 offset = noffset; 927 } 928 929 /* if present, add any custom IEs that go before HE */ 930 if (assoc_data->ie_len) { 931 static const u8 before_he[] = { 932 /* 933 * no need to list the ones split off before VHT 934 * or generated here 935 */ 936 WLAN_EID_OPMODE_NOTIF, 937 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 938 /* 11ai elements */ 939 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 940 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 941 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 942 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 943 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 944 /* TODO: add 11ah/11aj/11ak elements */ 945 }; 946 947 /* RIC already taken above, so no need to handle here anymore */ 948 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 949 before_he, ARRAY_SIZE(before_he), 950 offset); 951 pos = skb_put(skb, noffset - offset); 952 memcpy(pos, assoc_data->ie + offset, noffset - offset); 953 offset = noffset; 954 } 955 956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 957 ieee80211_add_vht_ie(sdata, skb, sband, 958 &assoc_data->ap_vht_cap); 959 960 /* 961 * If AP doesn't support HT, mark HE as disabled. 962 * If on the 5GHz band, make sure it supports VHT. 963 */ 964 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 965 (sband->band == NL80211_BAND_5GHZ && 966 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 967 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 968 969 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 970 ieee80211_add_he_ie(sdata, skb, sband); 971 972 /* if present, add any custom non-vendor IEs that go after HE */ 973 if (assoc_data->ie_len) { 974 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 975 assoc_data->ie_len, 976 offset); 977 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 978 offset = noffset; 979 } 980 981 if (assoc_data->wmm) { 982 if (assoc_data->uapsd) { 983 qos_info = ifmgd->uapsd_queues; 984 qos_info |= (ifmgd->uapsd_max_sp_len << 985 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 986 } else { 987 qos_info = 0; 988 } 989 990 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 991 } 992 993 /* add any remaining custom (i.e. vendor specific here) IEs */ 994 if (assoc_data->ie_len) { 995 noffset = assoc_data->ie_len; 996 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 997 } 998 999 if (assoc_data->fils_kek_len && 1000 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1001 dev_kfree_skb(skb); 1002 return; 1003 } 1004 1005 pos = skb_tail_pointer(skb); 1006 kfree(ifmgd->assoc_req_ies); 1007 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1008 ifmgd->assoc_req_ies_len = pos - ie_start; 1009 1010 drv_mgd_prepare_tx(local, sdata, 0); 1011 1012 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1013 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1014 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1015 IEEE80211_TX_INTFL_MLME_CONN_TX; 1016 ieee80211_tx_skb(sdata, skb); 1017 } 1018 1019 void ieee80211_send_pspoll(struct ieee80211_local *local, 1020 struct ieee80211_sub_if_data *sdata) 1021 { 1022 struct ieee80211_pspoll *pspoll; 1023 struct sk_buff *skb; 1024 1025 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1026 if (!skb) 1027 return; 1028 1029 pspoll = (struct ieee80211_pspoll *) skb->data; 1030 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1031 1032 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1033 ieee80211_tx_skb(sdata, skb); 1034 } 1035 1036 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1037 struct ieee80211_sub_if_data *sdata, 1038 bool powersave) 1039 { 1040 struct sk_buff *skb; 1041 struct ieee80211_hdr_3addr *nullfunc; 1042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1043 1044 /* Don't send NDPs when STA is connected HE */ 1045 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1046 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1047 return; 1048 1049 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1050 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1051 if (!skb) 1052 return; 1053 1054 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1055 if (powersave) 1056 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1057 1058 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1059 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1060 1061 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1062 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1063 1064 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1066 1067 ieee80211_tx_skb(sdata, skb); 1068 } 1069 1070 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1071 struct ieee80211_sub_if_data *sdata) 1072 { 1073 struct sk_buff *skb; 1074 struct ieee80211_hdr *nullfunc; 1075 __le16 fc; 1076 1077 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1078 return; 1079 1080 /* Don't send NDPs when connected HE */ 1081 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1082 return; 1083 1084 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1085 if (!skb) 1086 return; 1087 1088 skb_reserve(skb, local->hw.extra_tx_headroom); 1089 1090 nullfunc = skb_put_zero(skb, 30); 1091 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1092 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1093 nullfunc->frame_control = fc; 1094 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1095 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1096 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1097 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1098 1099 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1100 ieee80211_tx_skb(sdata, skb); 1101 } 1102 1103 /* spectrum management related things */ 1104 static void ieee80211_chswitch_work(struct work_struct *work) 1105 { 1106 struct ieee80211_sub_if_data *sdata = 1107 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1108 struct ieee80211_local *local = sdata->local; 1109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1110 int ret; 1111 1112 if (!ieee80211_sdata_running(sdata)) 1113 return; 1114 1115 sdata_lock(sdata); 1116 mutex_lock(&local->mtx); 1117 mutex_lock(&local->chanctx_mtx); 1118 1119 if (!ifmgd->associated) 1120 goto out; 1121 1122 if (!sdata->vif.csa_active) 1123 goto out; 1124 1125 /* 1126 * using reservation isn't immediate as it may be deferred until later 1127 * with multi-vif. once reservation is complete it will re-schedule the 1128 * work with no reserved_chanctx so verify chandef to check if it 1129 * completed successfully 1130 */ 1131 1132 if (sdata->reserved_chanctx) { 1133 struct ieee80211_supported_band *sband = NULL; 1134 struct sta_info *mgd_sta = NULL; 1135 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1136 1137 /* 1138 * with multi-vif csa driver may call ieee80211_csa_finish() 1139 * many times while waiting for other interfaces to use their 1140 * reservations 1141 */ 1142 if (sdata->reserved_ready) 1143 goto out; 1144 1145 if (sdata->vif.bss_conf.chandef.width != 1146 sdata->csa_chandef.width) { 1147 /* 1148 * For managed interface, we need to also update the AP 1149 * station bandwidth and align the rate scale algorithm 1150 * on the bandwidth change. Here we only consider the 1151 * bandwidth of the new channel definition (as channel 1152 * switch flow does not have the full HT/VHT/HE 1153 * information), assuming that if additional changes are 1154 * required they would be done as part of the processing 1155 * of the next beacon from the AP. 1156 */ 1157 switch (sdata->csa_chandef.width) { 1158 case NL80211_CHAN_WIDTH_20_NOHT: 1159 case NL80211_CHAN_WIDTH_20: 1160 default: 1161 bw = IEEE80211_STA_RX_BW_20; 1162 break; 1163 case NL80211_CHAN_WIDTH_40: 1164 bw = IEEE80211_STA_RX_BW_40; 1165 break; 1166 case NL80211_CHAN_WIDTH_80: 1167 bw = IEEE80211_STA_RX_BW_80; 1168 break; 1169 case NL80211_CHAN_WIDTH_80P80: 1170 case NL80211_CHAN_WIDTH_160: 1171 bw = IEEE80211_STA_RX_BW_160; 1172 break; 1173 } 1174 1175 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1176 sband = 1177 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1178 } 1179 1180 if (sdata->vif.bss_conf.chandef.width > 1181 sdata->csa_chandef.width) { 1182 mgd_sta->sta.bandwidth = bw; 1183 rate_control_rate_update(local, sband, mgd_sta, 1184 IEEE80211_RC_BW_CHANGED); 1185 } 1186 1187 ret = ieee80211_vif_use_reserved_context(sdata); 1188 if (ret) { 1189 sdata_info(sdata, 1190 "failed to use reserved channel context, disconnecting (err=%d)\n", 1191 ret); 1192 ieee80211_queue_work(&sdata->local->hw, 1193 &ifmgd->csa_connection_drop_work); 1194 goto out; 1195 } 1196 1197 if (sdata->vif.bss_conf.chandef.width < 1198 sdata->csa_chandef.width) { 1199 mgd_sta->sta.bandwidth = bw; 1200 rate_control_rate_update(local, sband, mgd_sta, 1201 IEEE80211_RC_BW_CHANGED); 1202 } 1203 1204 goto out; 1205 } 1206 1207 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1208 &sdata->csa_chandef)) { 1209 sdata_info(sdata, 1210 "failed to finalize channel switch, disconnecting\n"); 1211 ieee80211_queue_work(&sdata->local->hw, 1212 &ifmgd->csa_connection_drop_work); 1213 goto out; 1214 } 1215 1216 ifmgd->csa_waiting_bcn = true; 1217 1218 ieee80211_sta_reset_beacon_monitor(sdata); 1219 ieee80211_sta_reset_conn_monitor(sdata); 1220 1221 out: 1222 mutex_unlock(&local->chanctx_mtx); 1223 mutex_unlock(&local->mtx); 1224 sdata_unlock(sdata); 1225 } 1226 1227 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1228 { 1229 struct ieee80211_local *local = sdata->local; 1230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1231 int ret; 1232 1233 sdata_assert_lock(sdata); 1234 1235 WARN_ON(!sdata->vif.csa_active); 1236 1237 if (sdata->csa_block_tx) { 1238 ieee80211_wake_vif_queues(local, sdata, 1239 IEEE80211_QUEUE_STOP_REASON_CSA); 1240 sdata->csa_block_tx = false; 1241 } 1242 1243 sdata->vif.csa_active = false; 1244 ifmgd->csa_waiting_bcn = false; 1245 1246 ret = drv_post_channel_switch(sdata); 1247 if (ret) { 1248 sdata_info(sdata, 1249 "driver post channel switch failed, disconnecting\n"); 1250 ieee80211_queue_work(&local->hw, 1251 &ifmgd->csa_connection_drop_work); 1252 return; 1253 } 1254 1255 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1256 } 1257 1258 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1259 { 1260 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1262 1263 trace_api_chswitch_done(sdata, success); 1264 if (!success) { 1265 sdata_info(sdata, 1266 "driver channel switch failed, disconnecting\n"); 1267 ieee80211_queue_work(&sdata->local->hw, 1268 &ifmgd->csa_connection_drop_work); 1269 } else { 1270 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1271 } 1272 } 1273 EXPORT_SYMBOL(ieee80211_chswitch_done); 1274 1275 static void ieee80211_chswitch_timer(struct timer_list *t) 1276 { 1277 struct ieee80211_sub_if_data *sdata = 1278 from_timer(sdata, t, u.mgd.chswitch_timer); 1279 1280 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1281 } 1282 1283 static void 1284 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1285 { 1286 struct ieee80211_local *local = sdata->local; 1287 1288 if (!local->ops->abort_channel_switch) 1289 return; 1290 1291 mutex_lock(&local->mtx); 1292 1293 mutex_lock(&local->chanctx_mtx); 1294 ieee80211_vif_unreserve_chanctx(sdata); 1295 mutex_unlock(&local->chanctx_mtx); 1296 1297 if (sdata->csa_block_tx) 1298 ieee80211_wake_vif_queues(local, sdata, 1299 IEEE80211_QUEUE_STOP_REASON_CSA); 1300 1301 sdata->csa_block_tx = false; 1302 sdata->vif.csa_active = false; 1303 1304 mutex_unlock(&local->mtx); 1305 1306 drv_abort_channel_switch(sdata); 1307 } 1308 1309 static void 1310 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1311 u64 timestamp, u32 device_timestamp, 1312 struct ieee802_11_elems *elems, 1313 bool beacon) 1314 { 1315 struct ieee80211_local *local = sdata->local; 1316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1317 struct cfg80211_bss *cbss = ifmgd->associated; 1318 struct ieee80211_chanctx_conf *conf; 1319 struct ieee80211_chanctx *chanctx; 1320 enum nl80211_band current_band; 1321 struct ieee80211_csa_ie csa_ie; 1322 struct ieee80211_channel_switch ch_switch; 1323 int res; 1324 1325 sdata_assert_lock(sdata); 1326 1327 if (!cbss) 1328 return; 1329 1330 if (local->scanning) 1331 return; 1332 1333 current_band = cbss->channel->band; 1334 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1335 ifmgd->flags, 1336 ifmgd->associated->bssid, &csa_ie); 1337 1338 if (!res) { 1339 ch_switch.timestamp = timestamp; 1340 ch_switch.device_timestamp = device_timestamp; 1341 ch_switch.block_tx = csa_ie.mode; 1342 ch_switch.chandef = csa_ie.chandef; 1343 ch_switch.count = csa_ie.count; 1344 ch_switch.delay = csa_ie.max_switch_time; 1345 } 1346 1347 if (res < 0) { 1348 ieee80211_queue_work(&local->hw, 1349 &ifmgd->csa_connection_drop_work); 1350 return; 1351 } 1352 1353 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1354 if (res) 1355 ieee80211_sta_abort_chanswitch(sdata); 1356 else 1357 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1358 return; 1359 } else if (sdata->vif.csa_active || res) { 1360 /* disregard subsequent announcements if already processing */ 1361 return; 1362 } 1363 1364 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1365 IEEE80211_CHAN_DISABLED)) { 1366 sdata_info(sdata, 1367 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1368 ifmgd->associated->bssid, 1369 csa_ie.chandef.chan->center_freq, 1370 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1371 csa_ie.chandef.center_freq2); 1372 ieee80211_queue_work(&local->hw, 1373 &ifmgd->csa_connection_drop_work); 1374 return; 1375 } 1376 1377 if (cfg80211_chandef_identical(&csa_ie.chandef, 1378 &sdata->vif.bss_conf.chandef) && 1379 (!csa_ie.mode || !beacon)) { 1380 if (ifmgd->csa_ignored_same_chan) 1381 return; 1382 sdata_info(sdata, 1383 "AP %pM tries to chanswitch to same channel, ignore\n", 1384 ifmgd->associated->bssid); 1385 ifmgd->csa_ignored_same_chan = true; 1386 return; 1387 } 1388 1389 /* 1390 * Drop all TDLS peers - either we disconnect or move to a different 1391 * channel from this point on. There's no telling what our peer will do. 1392 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1393 * have an incompatible wider chandef. 1394 */ 1395 ieee80211_teardown_tdls_peers(sdata); 1396 1397 mutex_lock(&local->mtx); 1398 mutex_lock(&local->chanctx_mtx); 1399 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1400 lockdep_is_held(&local->chanctx_mtx)); 1401 if (!conf) { 1402 sdata_info(sdata, 1403 "no channel context assigned to vif?, disconnecting\n"); 1404 goto drop_connection; 1405 } 1406 1407 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1408 1409 if (local->use_chanctx && 1410 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1411 sdata_info(sdata, 1412 "driver doesn't support chan-switch with channel contexts\n"); 1413 goto drop_connection; 1414 } 1415 1416 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1417 sdata_info(sdata, 1418 "preparing for channel switch failed, disconnecting\n"); 1419 goto drop_connection; 1420 } 1421 1422 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1423 chanctx->mode, false); 1424 if (res) { 1425 sdata_info(sdata, 1426 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1427 res); 1428 goto drop_connection; 1429 } 1430 mutex_unlock(&local->chanctx_mtx); 1431 1432 sdata->vif.csa_active = true; 1433 sdata->csa_chandef = csa_ie.chandef; 1434 sdata->csa_block_tx = csa_ie.mode; 1435 ifmgd->csa_ignored_same_chan = false; 1436 1437 if (sdata->csa_block_tx) 1438 ieee80211_stop_vif_queues(local, sdata, 1439 IEEE80211_QUEUE_STOP_REASON_CSA); 1440 mutex_unlock(&local->mtx); 1441 1442 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1443 csa_ie.count); 1444 1445 if (local->ops->channel_switch) { 1446 /* use driver's channel switch callback */ 1447 drv_channel_switch(local, sdata, &ch_switch); 1448 return; 1449 } 1450 1451 /* channel switch handled in software */ 1452 if (csa_ie.count <= 1) 1453 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1454 else 1455 mod_timer(&ifmgd->chswitch_timer, 1456 TU_TO_EXP_TIME((csa_ie.count - 1) * 1457 cbss->beacon_interval)); 1458 return; 1459 drop_connection: 1460 /* 1461 * This is just so that the disconnect flow will know that 1462 * we were trying to switch channel and failed. In case the 1463 * mode is 1 (we are not allowed to Tx), we will know not to 1464 * send a deauthentication frame. Those two fields will be 1465 * reset when the disconnection worker runs. 1466 */ 1467 sdata->vif.csa_active = true; 1468 sdata->csa_block_tx = csa_ie.mode; 1469 1470 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1471 mutex_unlock(&local->chanctx_mtx); 1472 mutex_unlock(&local->mtx); 1473 } 1474 1475 static bool 1476 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1477 struct ieee80211_channel *channel, 1478 const u8 *country_ie, u8 country_ie_len, 1479 const u8 *pwr_constr_elem, 1480 int *chan_pwr, int *pwr_reduction) 1481 { 1482 struct ieee80211_country_ie_triplet *triplet; 1483 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1484 int i, chan_increment; 1485 bool have_chan_pwr = false; 1486 1487 /* Invalid IE */ 1488 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1489 return false; 1490 1491 triplet = (void *)(country_ie + 3); 1492 country_ie_len -= 3; 1493 1494 switch (channel->band) { 1495 default: 1496 WARN_ON_ONCE(1); 1497 /* fall through */ 1498 case NL80211_BAND_2GHZ: 1499 case NL80211_BAND_60GHZ: 1500 chan_increment = 1; 1501 break; 1502 case NL80211_BAND_5GHZ: 1503 chan_increment = 4; 1504 break; 1505 } 1506 1507 /* find channel */ 1508 while (country_ie_len >= 3) { 1509 u8 first_channel = triplet->chans.first_channel; 1510 1511 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1512 goto next; 1513 1514 for (i = 0; i < triplet->chans.num_channels; i++) { 1515 if (first_channel + i * chan_increment == chan) { 1516 have_chan_pwr = true; 1517 *chan_pwr = triplet->chans.max_power; 1518 break; 1519 } 1520 } 1521 if (have_chan_pwr) 1522 break; 1523 1524 next: 1525 triplet++; 1526 country_ie_len -= 3; 1527 } 1528 1529 if (have_chan_pwr && pwr_constr_elem) 1530 *pwr_reduction = *pwr_constr_elem; 1531 else 1532 *pwr_reduction = 0; 1533 1534 return have_chan_pwr; 1535 } 1536 1537 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1538 struct ieee80211_channel *channel, 1539 const u8 *cisco_dtpc_ie, 1540 int *pwr_level) 1541 { 1542 /* From practical testing, the first data byte of the DTPC element 1543 * seems to contain the requested dBm level, and the CLI on Cisco 1544 * APs clearly state the range is -127 to 127 dBm, which indicates 1545 * a signed byte, although it seemingly never actually goes negative. 1546 * The other byte seems to always be zero. 1547 */ 1548 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1549 } 1550 1551 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1552 struct ieee80211_channel *channel, 1553 struct ieee80211_mgmt *mgmt, 1554 const u8 *country_ie, u8 country_ie_len, 1555 const u8 *pwr_constr_ie, 1556 const u8 *cisco_dtpc_ie) 1557 { 1558 bool has_80211h_pwr = false, has_cisco_pwr = false; 1559 int chan_pwr = 0, pwr_reduction_80211h = 0; 1560 int pwr_level_cisco, pwr_level_80211h; 1561 int new_ap_level; 1562 __le16 capab = mgmt->u.probe_resp.capab_info; 1563 1564 if (country_ie && 1565 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1566 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1567 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1568 sdata, channel, country_ie, country_ie_len, 1569 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1570 pwr_level_80211h = 1571 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1572 } 1573 1574 if (cisco_dtpc_ie) { 1575 ieee80211_find_cisco_dtpc( 1576 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1577 has_cisco_pwr = true; 1578 } 1579 1580 if (!has_80211h_pwr && !has_cisco_pwr) 1581 return 0; 1582 1583 /* If we have both 802.11h and Cisco DTPC, apply both limits 1584 * by picking the smallest of the two power levels advertised. 1585 */ 1586 if (has_80211h_pwr && 1587 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1588 new_ap_level = pwr_level_80211h; 1589 1590 if (sdata->ap_power_level == new_ap_level) 1591 return 0; 1592 1593 sdata_dbg(sdata, 1594 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1595 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1596 sdata->u.mgd.bssid); 1597 } else { /* has_cisco_pwr is always true here. */ 1598 new_ap_level = pwr_level_cisco; 1599 1600 if (sdata->ap_power_level == new_ap_level) 1601 return 0; 1602 1603 sdata_dbg(sdata, 1604 "Limiting TX power to %d dBm as advertised by %pM\n", 1605 pwr_level_cisco, sdata->u.mgd.bssid); 1606 } 1607 1608 sdata->ap_power_level = new_ap_level; 1609 if (__ieee80211_recalc_txpower(sdata)) 1610 return BSS_CHANGED_TXPOWER; 1611 return 0; 1612 } 1613 1614 /* powersave */ 1615 static void ieee80211_enable_ps(struct ieee80211_local *local, 1616 struct ieee80211_sub_if_data *sdata) 1617 { 1618 struct ieee80211_conf *conf = &local->hw.conf; 1619 1620 /* 1621 * If we are scanning right now then the parameters will 1622 * take effect when scan finishes. 1623 */ 1624 if (local->scanning) 1625 return; 1626 1627 if (conf->dynamic_ps_timeout > 0 && 1628 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1629 mod_timer(&local->dynamic_ps_timer, jiffies + 1630 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1631 } else { 1632 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1633 ieee80211_send_nullfunc(local, sdata, true); 1634 1635 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1636 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1637 return; 1638 1639 conf->flags |= IEEE80211_CONF_PS; 1640 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1641 } 1642 } 1643 1644 static void ieee80211_change_ps(struct ieee80211_local *local) 1645 { 1646 struct ieee80211_conf *conf = &local->hw.conf; 1647 1648 if (local->ps_sdata) { 1649 ieee80211_enable_ps(local, local->ps_sdata); 1650 } else if (conf->flags & IEEE80211_CONF_PS) { 1651 conf->flags &= ~IEEE80211_CONF_PS; 1652 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1653 del_timer_sync(&local->dynamic_ps_timer); 1654 cancel_work_sync(&local->dynamic_ps_enable_work); 1655 } 1656 } 1657 1658 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1659 { 1660 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1661 struct sta_info *sta = NULL; 1662 bool authorized = false; 1663 1664 if (!mgd->powersave) 1665 return false; 1666 1667 if (mgd->broken_ap) 1668 return false; 1669 1670 if (!mgd->associated) 1671 return false; 1672 1673 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1674 return false; 1675 1676 if (!mgd->have_beacon) 1677 return false; 1678 1679 rcu_read_lock(); 1680 sta = sta_info_get(sdata, mgd->bssid); 1681 if (sta) 1682 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1683 rcu_read_unlock(); 1684 1685 return authorized; 1686 } 1687 1688 /* need to hold RTNL or interface lock */ 1689 void ieee80211_recalc_ps(struct ieee80211_local *local) 1690 { 1691 struct ieee80211_sub_if_data *sdata, *found = NULL; 1692 int count = 0; 1693 int timeout; 1694 1695 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1696 local->ps_sdata = NULL; 1697 return; 1698 } 1699 1700 list_for_each_entry(sdata, &local->interfaces, list) { 1701 if (!ieee80211_sdata_running(sdata)) 1702 continue; 1703 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1704 /* If an AP vif is found, then disable PS 1705 * by setting the count to zero thereby setting 1706 * ps_sdata to NULL. 1707 */ 1708 count = 0; 1709 break; 1710 } 1711 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1712 continue; 1713 found = sdata; 1714 count++; 1715 } 1716 1717 if (count == 1 && ieee80211_powersave_allowed(found)) { 1718 u8 dtimper = found->u.mgd.dtim_period; 1719 1720 timeout = local->dynamic_ps_forced_timeout; 1721 if (timeout < 0) 1722 timeout = 100; 1723 local->hw.conf.dynamic_ps_timeout = timeout; 1724 1725 /* If the TIM IE is invalid, pretend the value is 1 */ 1726 if (!dtimper) 1727 dtimper = 1; 1728 1729 local->hw.conf.ps_dtim_period = dtimper; 1730 local->ps_sdata = found; 1731 } else { 1732 local->ps_sdata = NULL; 1733 } 1734 1735 ieee80211_change_ps(local); 1736 } 1737 1738 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1739 { 1740 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1741 1742 if (sdata->vif.bss_conf.ps != ps_allowed) { 1743 sdata->vif.bss_conf.ps = ps_allowed; 1744 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1745 } 1746 } 1747 1748 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1749 { 1750 struct ieee80211_local *local = 1751 container_of(work, struct ieee80211_local, 1752 dynamic_ps_disable_work); 1753 1754 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1755 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1756 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1757 } 1758 1759 ieee80211_wake_queues_by_reason(&local->hw, 1760 IEEE80211_MAX_QUEUE_MAP, 1761 IEEE80211_QUEUE_STOP_REASON_PS, 1762 false); 1763 } 1764 1765 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1766 { 1767 struct ieee80211_local *local = 1768 container_of(work, struct ieee80211_local, 1769 dynamic_ps_enable_work); 1770 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1771 struct ieee80211_if_managed *ifmgd; 1772 unsigned long flags; 1773 int q; 1774 1775 /* can only happen when PS was just disabled anyway */ 1776 if (!sdata) 1777 return; 1778 1779 ifmgd = &sdata->u.mgd; 1780 1781 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1782 return; 1783 1784 if (local->hw.conf.dynamic_ps_timeout > 0) { 1785 /* don't enter PS if TX frames are pending */ 1786 if (drv_tx_frames_pending(local)) { 1787 mod_timer(&local->dynamic_ps_timer, jiffies + 1788 msecs_to_jiffies( 1789 local->hw.conf.dynamic_ps_timeout)); 1790 return; 1791 } 1792 1793 /* 1794 * transmission can be stopped by others which leads to 1795 * dynamic_ps_timer expiry. Postpone the ps timer if it 1796 * is not the actual idle state. 1797 */ 1798 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1799 for (q = 0; q < local->hw.queues; q++) { 1800 if (local->queue_stop_reasons[q]) { 1801 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1802 flags); 1803 mod_timer(&local->dynamic_ps_timer, jiffies + 1804 msecs_to_jiffies( 1805 local->hw.conf.dynamic_ps_timeout)); 1806 return; 1807 } 1808 } 1809 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1810 } 1811 1812 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1813 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1814 if (drv_tx_frames_pending(local)) { 1815 mod_timer(&local->dynamic_ps_timer, jiffies + 1816 msecs_to_jiffies( 1817 local->hw.conf.dynamic_ps_timeout)); 1818 } else { 1819 ieee80211_send_nullfunc(local, sdata, true); 1820 /* Flush to get the tx status of nullfunc frame */ 1821 ieee80211_flush_queues(local, sdata, false); 1822 } 1823 } 1824 1825 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1826 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1827 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1828 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1829 local->hw.conf.flags |= IEEE80211_CONF_PS; 1830 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1831 } 1832 } 1833 1834 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1835 { 1836 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1837 1838 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1839 } 1840 1841 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1842 { 1843 struct delayed_work *delayed_work = to_delayed_work(work); 1844 struct ieee80211_sub_if_data *sdata = 1845 container_of(delayed_work, struct ieee80211_sub_if_data, 1846 dfs_cac_timer_work); 1847 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1848 1849 mutex_lock(&sdata->local->mtx); 1850 if (sdata->wdev.cac_started) { 1851 ieee80211_vif_release_channel(sdata); 1852 cfg80211_cac_event(sdata->dev, &chandef, 1853 NL80211_RADAR_CAC_FINISHED, 1854 GFP_KERNEL); 1855 } 1856 mutex_unlock(&sdata->local->mtx); 1857 } 1858 1859 static bool 1860 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1861 { 1862 struct ieee80211_local *local = sdata->local; 1863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1864 bool ret = false; 1865 int ac; 1866 1867 if (local->hw.queues < IEEE80211_NUM_ACS) 1868 return false; 1869 1870 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1871 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1872 int non_acm_ac; 1873 unsigned long now = jiffies; 1874 1875 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1876 tx_tspec->admitted_time && 1877 time_after(now, tx_tspec->time_slice_start + HZ)) { 1878 tx_tspec->consumed_tx_time = 0; 1879 tx_tspec->time_slice_start = now; 1880 1881 if (tx_tspec->downgraded) 1882 tx_tspec->action = 1883 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1884 } 1885 1886 switch (tx_tspec->action) { 1887 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1888 /* take the original parameters */ 1889 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1890 sdata_err(sdata, 1891 "failed to set TX queue parameters for queue %d\n", 1892 ac); 1893 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1894 tx_tspec->downgraded = false; 1895 ret = true; 1896 break; 1897 case TX_TSPEC_ACTION_DOWNGRADE: 1898 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1899 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1900 ret = true; 1901 break; 1902 } 1903 /* downgrade next lower non-ACM AC */ 1904 for (non_acm_ac = ac + 1; 1905 non_acm_ac < IEEE80211_NUM_ACS; 1906 non_acm_ac++) 1907 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1908 break; 1909 /* Usually the loop will result in using BK even if it 1910 * requires admission control, but such a configuration 1911 * makes no sense and we have to transmit somehow - the 1912 * AC selection does the same thing. 1913 * If we started out trying to downgrade from BK, then 1914 * the extra condition here might be needed. 1915 */ 1916 if (non_acm_ac >= IEEE80211_NUM_ACS) 1917 non_acm_ac = IEEE80211_AC_BK; 1918 if (drv_conf_tx(local, sdata, ac, 1919 &sdata->tx_conf[non_acm_ac])) 1920 sdata_err(sdata, 1921 "failed to set TX queue parameters for queue %d\n", 1922 ac); 1923 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1924 ret = true; 1925 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1926 tx_tspec->time_slice_start + HZ - now + 1); 1927 break; 1928 case TX_TSPEC_ACTION_NONE: 1929 /* nothing now */ 1930 break; 1931 } 1932 } 1933 1934 return ret; 1935 } 1936 1937 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1938 { 1939 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1940 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1941 } 1942 1943 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1944 { 1945 struct ieee80211_sub_if_data *sdata; 1946 1947 sdata = container_of(work, struct ieee80211_sub_if_data, 1948 u.mgd.tx_tspec_wk.work); 1949 ieee80211_sta_handle_tspec_ac_params(sdata); 1950 } 1951 1952 /* MLME */ 1953 static bool 1954 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1955 struct ieee80211_sub_if_data *sdata, 1956 const u8 *wmm_param, size_t wmm_param_len, 1957 const struct ieee80211_mu_edca_param_set *mu_edca) 1958 { 1959 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1961 size_t left; 1962 int count, mu_edca_count, ac; 1963 const u8 *pos; 1964 u8 uapsd_queues = 0; 1965 1966 if (!local->ops->conf_tx) 1967 return false; 1968 1969 if (local->hw.queues < IEEE80211_NUM_ACS) 1970 return false; 1971 1972 if (!wmm_param) 1973 return false; 1974 1975 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1976 return false; 1977 1978 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1979 uapsd_queues = ifmgd->uapsd_queues; 1980 1981 count = wmm_param[6] & 0x0f; 1982 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1983 * if mu_edca was preset before and now it disappeared tell 1984 * the driver about it. 1985 */ 1986 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1987 if (count == ifmgd->wmm_last_param_set && 1988 mu_edca_count == ifmgd->mu_edca_last_param_set) 1989 return false; 1990 ifmgd->wmm_last_param_set = count; 1991 ifmgd->mu_edca_last_param_set = mu_edca_count; 1992 1993 pos = wmm_param + 8; 1994 left = wmm_param_len - 8; 1995 1996 memset(¶ms, 0, sizeof(params)); 1997 1998 sdata->wmm_acm = 0; 1999 for (; left >= 4; left -= 4, pos += 4) { 2000 int aci = (pos[0] >> 5) & 0x03; 2001 int acm = (pos[0] >> 4) & 0x01; 2002 bool uapsd = false; 2003 2004 switch (aci) { 2005 case 1: /* AC_BK */ 2006 ac = IEEE80211_AC_BK; 2007 if (acm) 2008 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2009 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2010 uapsd = true; 2011 params[ac].mu_edca = !!mu_edca; 2012 if (mu_edca) 2013 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2014 break; 2015 case 2: /* AC_VI */ 2016 ac = IEEE80211_AC_VI; 2017 if (acm) 2018 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2019 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2020 uapsd = true; 2021 params[ac].mu_edca = !!mu_edca; 2022 if (mu_edca) 2023 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2024 break; 2025 case 3: /* AC_VO */ 2026 ac = IEEE80211_AC_VO; 2027 if (acm) 2028 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2029 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2030 uapsd = true; 2031 params[ac].mu_edca = !!mu_edca; 2032 if (mu_edca) 2033 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2034 break; 2035 case 0: /* AC_BE */ 2036 default: 2037 ac = IEEE80211_AC_BE; 2038 if (acm) 2039 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2040 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2041 uapsd = true; 2042 params[ac].mu_edca = !!mu_edca; 2043 if (mu_edca) 2044 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2045 break; 2046 } 2047 2048 params[ac].aifs = pos[0] & 0x0f; 2049 2050 if (params[ac].aifs < 2) { 2051 sdata_info(sdata, 2052 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2053 params[ac].aifs, aci); 2054 params[ac].aifs = 2; 2055 } 2056 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2057 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2058 params[ac].txop = get_unaligned_le16(pos + 2); 2059 params[ac].acm = acm; 2060 params[ac].uapsd = uapsd; 2061 2062 if (params[ac].cw_min == 0 || 2063 params[ac].cw_min > params[ac].cw_max) { 2064 sdata_info(sdata, 2065 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2066 params[ac].cw_min, params[ac].cw_max, aci); 2067 return false; 2068 } 2069 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2070 } 2071 2072 /* WMM specification requires all 4 ACIs. */ 2073 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2074 if (params[ac].cw_min == 0) { 2075 sdata_info(sdata, 2076 "AP has invalid WMM params (missing AC %d), using defaults\n", 2077 ac); 2078 return false; 2079 } 2080 } 2081 2082 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2083 mlme_dbg(sdata, 2084 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2085 ac, params[ac].acm, 2086 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2087 params[ac].txop, params[ac].uapsd, 2088 ifmgd->tx_tspec[ac].downgraded); 2089 sdata->tx_conf[ac] = params[ac]; 2090 if (!ifmgd->tx_tspec[ac].downgraded && 2091 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2092 sdata_err(sdata, 2093 "failed to set TX queue parameters for AC %d\n", 2094 ac); 2095 } 2096 2097 /* enable WMM or activate new settings */ 2098 sdata->vif.bss_conf.qos = true; 2099 return true; 2100 } 2101 2102 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2103 { 2104 lockdep_assert_held(&sdata->local->mtx); 2105 2106 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2107 ieee80211_run_deferred_scan(sdata->local); 2108 } 2109 2110 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2111 { 2112 mutex_lock(&sdata->local->mtx); 2113 __ieee80211_stop_poll(sdata); 2114 mutex_unlock(&sdata->local->mtx); 2115 } 2116 2117 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2118 u16 capab, bool erp_valid, u8 erp) 2119 { 2120 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2121 struct ieee80211_supported_band *sband; 2122 u32 changed = 0; 2123 bool use_protection; 2124 bool use_short_preamble; 2125 bool use_short_slot; 2126 2127 sband = ieee80211_get_sband(sdata); 2128 if (!sband) 2129 return changed; 2130 2131 if (erp_valid) { 2132 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2133 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2134 } else { 2135 use_protection = false; 2136 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2137 } 2138 2139 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2140 if (sband->band == NL80211_BAND_5GHZ) 2141 use_short_slot = true; 2142 2143 if (use_protection != bss_conf->use_cts_prot) { 2144 bss_conf->use_cts_prot = use_protection; 2145 changed |= BSS_CHANGED_ERP_CTS_PROT; 2146 } 2147 2148 if (use_short_preamble != bss_conf->use_short_preamble) { 2149 bss_conf->use_short_preamble = use_short_preamble; 2150 changed |= BSS_CHANGED_ERP_PREAMBLE; 2151 } 2152 2153 if (use_short_slot != bss_conf->use_short_slot) { 2154 bss_conf->use_short_slot = use_short_slot; 2155 changed |= BSS_CHANGED_ERP_SLOT; 2156 } 2157 2158 return changed; 2159 } 2160 2161 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2162 struct cfg80211_bss *cbss, 2163 u32 bss_info_changed) 2164 { 2165 struct ieee80211_bss *bss = (void *)cbss->priv; 2166 struct ieee80211_local *local = sdata->local; 2167 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2168 2169 bss_info_changed |= BSS_CHANGED_ASSOC; 2170 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2171 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2172 2173 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2174 beacon_loss_count * bss_conf->beacon_int)); 2175 2176 sdata->u.mgd.associated = cbss; 2177 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2178 2179 ieee80211_check_rate_mask(sdata); 2180 2181 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2182 2183 if (sdata->vif.p2p || 2184 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2185 const struct cfg80211_bss_ies *ies; 2186 2187 rcu_read_lock(); 2188 ies = rcu_dereference(cbss->ies); 2189 if (ies) { 2190 int ret; 2191 2192 ret = cfg80211_get_p2p_attr( 2193 ies->data, ies->len, 2194 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2195 (u8 *) &bss_conf->p2p_noa_attr, 2196 sizeof(bss_conf->p2p_noa_attr)); 2197 if (ret >= 2) { 2198 sdata->u.mgd.p2p_noa_index = 2199 bss_conf->p2p_noa_attr.index; 2200 bss_info_changed |= BSS_CHANGED_P2P_PS; 2201 } 2202 } 2203 rcu_read_unlock(); 2204 } 2205 2206 /* just to be sure */ 2207 ieee80211_stop_poll(sdata); 2208 2209 ieee80211_led_assoc(local, 1); 2210 2211 if (sdata->u.mgd.have_beacon) { 2212 /* 2213 * If the AP is buggy we may get here with no DTIM period 2214 * known, so assume it's 1 which is the only safe assumption 2215 * in that case, although if the TIM IE is broken powersave 2216 * probably just won't work at all. 2217 */ 2218 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2219 bss_conf->beacon_rate = bss->beacon_rate; 2220 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2221 } else { 2222 bss_conf->beacon_rate = NULL; 2223 bss_conf->dtim_period = 0; 2224 } 2225 2226 bss_conf->assoc = 1; 2227 2228 /* Tell the driver to monitor connection quality (if supported) */ 2229 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2230 bss_conf->cqm_rssi_thold) 2231 bss_info_changed |= BSS_CHANGED_CQM; 2232 2233 /* Enable ARP filtering */ 2234 if (bss_conf->arp_addr_cnt) 2235 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2236 2237 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2238 2239 mutex_lock(&local->iflist_mtx); 2240 ieee80211_recalc_ps(local); 2241 mutex_unlock(&local->iflist_mtx); 2242 2243 ieee80211_recalc_smps(sdata); 2244 ieee80211_recalc_ps_vif(sdata); 2245 2246 netif_carrier_on(sdata->dev); 2247 } 2248 2249 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2250 u16 stype, u16 reason, bool tx, 2251 u8 *frame_buf) 2252 { 2253 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2254 struct ieee80211_local *local = sdata->local; 2255 u32 changed = 0; 2256 2257 sdata_assert_lock(sdata); 2258 2259 if (WARN_ON_ONCE(tx && !frame_buf)) 2260 return; 2261 2262 if (WARN_ON(!ifmgd->associated)) 2263 return; 2264 2265 ieee80211_stop_poll(sdata); 2266 2267 ifmgd->associated = NULL; 2268 netif_carrier_off(sdata->dev); 2269 2270 /* 2271 * if we want to get out of ps before disassoc (why?) we have 2272 * to do it before sending disassoc, as otherwise the null-packet 2273 * won't be valid. 2274 */ 2275 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2276 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2277 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2278 } 2279 local->ps_sdata = NULL; 2280 2281 /* disable per-vif ps */ 2282 ieee80211_recalc_ps_vif(sdata); 2283 2284 /* make sure ongoing transmission finishes */ 2285 synchronize_net(); 2286 2287 /* 2288 * drop any frame before deauth/disassoc, this can be data or 2289 * management frame. Since we are disconnecting, we should not 2290 * insist sending these frames which can take time and delay 2291 * the disconnection and possible the roaming. 2292 */ 2293 if (tx) 2294 ieee80211_flush_queues(local, sdata, true); 2295 2296 /* deauthenticate/disassociate now */ 2297 if (tx || frame_buf) { 2298 /* 2299 * In multi channel scenarios guarantee that the virtual 2300 * interface is granted immediate airtime to transmit the 2301 * deauthentication frame by calling mgd_prepare_tx, if the 2302 * driver requested so. 2303 */ 2304 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2305 !ifmgd->have_beacon) 2306 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2307 2308 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2309 ifmgd->bssid, stype, reason, 2310 tx, frame_buf); 2311 } 2312 2313 /* flush out frame - make sure the deauth was actually sent */ 2314 if (tx) 2315 ieee80211_flush_queues(local, sdata, false); 2316 2317 /* clear bssid only after building the needed mgmt frames */ 2318 eth_zero_addr(ifmgd->bssid); 2319 2320 /* remove AP and TDLS peers */ 2321 sta_info_flush(sdata); 2322 2323 /* finally reset all BSS / config parameters */ 2324 changed |= ieee80211_reset_erp_info(sdata); 2325 2326 ieee80211_led_assoc(local, 0); 2327 changed |= BSS_CHANGED_ASSOC; 2328 sdata->vif.bss_conf.assoc = false; 2329 2330 ifmgd->p2p_noa_index = -1; 2331 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2332 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2333 2334 /* on the next assoc, re-program HT/VHT parameters */ 2335 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2336 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2337 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2338 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2339 2340 /* reset MU-MIMO ownership and group data */ 2341 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2342 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2343 memset(sdata->vif.bss_conf.mu_group.position, 0, 2344 sizeof(sdata->vif.bss_conf.mu_group.position)); 2345 changed |= BSS_CHANGED_MU_GROUPS; 2346 sdata->vif.mu_mimo_owner = false; 2347 2348 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2349 2350 del_timer_sync(&local->dynamic_ps_timer); 2351 cancel_work_sync(&local->dynamic_ps_enable_work); 2352 2353 /* Disable ARP filtering */ 2354 if (sdata->vif.bss_conf.arp_addr_cnt) 2355 changed |= BSS_CHANGED_ARP_FILTER; 2356 2357 sdata->vif.bss_conf.qos = false; 2358 changed |= BSS_CHANGED_QOS; 2359 2360 /* The BSSID (not really interesting) and HT changed */ 2361 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2362 ieee80211_bss_info_change_notify(sdata, changed); 2363 2364 /* disassociated - set to defaults now */ 2365 ieee80211_set_wmm_default(sdata, false, false); 2366 2367 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2368 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2369 del_timer_sync(&sdata->u.mgd.timer); 2370 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2371 2372 sdata->vif.bss_conf.dtim_period = 0; 2373 sdata->vif.bss_conf.beacon_rate = NULL; 2374 2375 ifmgd->have_beacon = false; 2376 2377 ifmgd->flags = 0; 2378 mutex_lock(&local->mtx); 2379 ieee80211_vif_release_channel(sdata); 2380 2381 sdata->vif.csa_active = false; 2382 ifmgd->csa_waiting_bcn = false; 2383 ifmgd->csa_ignored_same_chan = false; 2384 if (sdata->csa_block_tx) { 2385 ieee80211_wake_vif_queues(local, sdata, 2386 IEEE80211_QUEUE_STOP_REASON_CSA); 2387 sdata->csa_block_tx = false; 2388 } 2389 mutex_unlock(&local->mtx); 2390 2391 /* existing TX TSPEC sessions no longer exist */ 2392 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2393 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2394 2395 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2396 } 2397 2398 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2399 struct ieee80211_hdr *hdr) 2400 { 2401 /* 2402 * We can postpone the mgd.timer whenever receiving unicast frames 2403 * from AP because we know that the connection is working both ways 2404 * at that time. But multicast frames (and hence also beacons) must 2405 * be ignored here, because we need to trigger the timer during 2406 * data idle periods for sending the periodic probe request to the 2407 * AP we're connected to. 2408 */ 2409 if (is_multicast_ether_addr(hdr->addr1)) 2410 return; 2411 2412 ieee80211_sta_reset_conn_monitor(sdata); 2413 } 2414 2415 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2416 { 2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2418 struct ieee80211_local *local = sdata->local; 2419 2420 mutex_lock(&local->mtx); 2421 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2422 goto out; 2423 2424 __ieee80211_stop_poll(sdata); 2425 2426 mutex_lock(&local->iflist_mtx); 2427 ieee80211_recalc_ps(local); 2428 mutex_unlock(&local->iflist_mtx); 2429 2430 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2431 goto out; 2432 2433 /* 2434 * We've received a probe response, but are not sure whether 2435 * we have or will be receiving any beacons or data, so let's 2436 * schedule the timers again, just in case. 2437 */ 2438 ieee80211_sta_reset_beacon_monitor(sdata); 2439 2440 mod_timer(&ifmgd->conn_mon_timer, 2441 round_jiffies_up(jiffies + 2442 IEEE80211_CONNECTION_IDLE_TIME)); 2443 out: 2444 mutex_unlock(&local->mtx); 2445 } 2446 2447 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2448 struct ieee80211_hdr *hdr, 2449 u16 tx_time) 2450 { 2451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2452 u16 tid = ieee80211_get_tid(hdr); 2453 int ac = ieee80211_ac_from_tid(tid); 2454 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2455 unsigned long now = jiffies; 2456 2457 if (likely(!tx_tspec->admitted_time)) 2458 return; 2459 2460 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2461 tx_tspec->consumed_tx_time = 0; 2462 tx_tspec->time_slice_start = now; 2463 2464 if (tx_tspec->downgraded) { 2465 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2466 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2467 } 2468 } 2469 2470 if (tx_tspec->downgraded) 2471 return; 2472 2473 tx_tspec->consumed_tx_time += tx_time; 2474 2475 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2476 tx_tspec->downgraded = true; 2477 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2478 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2479 } 2480 } 2481 2482 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2483 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2484 { 2485 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2486 2487 if (!ieee80211_is_data(hdr->frame_control)) 2488 return; 2489 2490 if (ieee80211_is_any_nullfunc(hdr->frame_control) && 2491 sdata->u.mgd.probe_send_count > 0) { 2492 if (ack) 2493 ieee80211_sta_reset_conn_monitor(sdata); 2494 else 2495 sdata->u.mgd.nullfunc_failed = true; 2496 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2497 return; 2498 } 2499 2500 if (ack) 2501 ieee80211_sta_reset_conn_monitor(sdata); 2502 } 2503 2504 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2505 const u8 *src, const u8 *dst, 2506 const u8 *ssid, size_t ssid_len, 2507 struct ieee80211_channel *channel) 2508 { 2509 struct sk_buff *skb; 2510 2511 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2512 ssid, ssid_len, NULL, 0, 2513 IEEE80211_PROBE_FLAG_DIRECTED); 2514 if (skb) 2515 ieee80211_tx_skb(sdata, skb); 2516 } 2517 2518 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2519 { 2520 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2521 const u8 *ssid; 2522 u8 *dst = ifmgd->associated->bssid; 2523 u8 unicast_limit = max(1, max_probe_tries - 3); 2524 struct sta_info *sta; 2525 2526 /* 2527 * Try sending broadcast probe requests for the last three 2528 * probe requests after the first ones failed since some 2529 * buggy APs only support broadcast probe requests. 2530 */ 2531 if (ifmgd->probe_send_count >= unicast_limit) 2532 dst = NULL; 2533 2534 /* 2535 * When the hardware reports an accurate Tx ACK status, it's 2536 * better to send a nullfunc frame instead of a probe request, 2537 * as it will kick us off the AP quickly if we aren't associated 2538 * anymore. The timeout will be reset if the frame is ACKed by 2539 * the AP. 2540 */ 2541 ifmgd->probe_send_count++; 2542 2543 if (dst) { 2544 mutex_lock(&sdata->local->sta_mtx); 2545 sta = sta_info_get(sdata, dst); 2546 if (!WARN_ON(!sta)) 2547 ieee80211_check_fast_rx(sta); 2548 mutex_unlock(&sdata->local->sta_mtx); 2549 } 2550 2551 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2552 ifmgd->nullfunc_failed = false; 2553 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 2554 ifmgd->probe_send_count--; 2555 else 2556 ieee80211_send_nullfunc(sdata->local, sdata, false); 2557 } else { 2558 int ssid_len; 2559 2560 rcu_read_lock(); 2561 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2562 if (WARN_ON_ONCE(ssid == NULL)) 2563 ssid_len = 0; 2564 else 2565 ssid_len = ssid[1]; 2566 2567 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2568 ssid + 2, ssid_len, 2569 ifmgd->associated->channel); 2570 rcu_read_unlock(); 2571 } 2572 2573 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2574 run_again(sdata, ifmgd->probe_timeout); 2575 } 2576 2577 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2578 bool beacon) 2579 { 2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2581 bool already = false; 2582 2583 if (!ieee80211_sdata_running(sdata)) 2584 return; 2585 2586 sdata_lock(sdata); 2587 2588 if (!ifmgd->associated) 2589 goto out; 2590 2591 mutex_lock(&sdata->local->mtx); 2592 2593 if (sdata->local->tmp_channel || sdata->local->scanning) { 2594 mutex_unlock(&sdata->local->mtx); 2595 goto out; 2596 } 2597 2598 if (beacon) { 2599 mlme_dbg_ratelimited(sdata, 2600 "detected beacon loss from AP (missed %d beacons) - probing\n", 2601 beacon_loss_count); 2602 2603 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2604 } 2605 2606 /* 2607 * The driver/our work has already reported this event or the 2608 * connection monitoring has kicked in and we have already sent 2609 * a probe request. Or maybe the AP died and the driver keeps 2610 * reporting until we disassociate... 2611 * 2612 * In either case we have to ignore the current call to this 2613 * function (except for setting the correct probe reason bit) 2614 * because otherwise we would reset the timer every time and 2615 * never check whether we received a probe response! 2616 */ 2617 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2618 already = true; 2619 2620 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2621 2622 mutex_unlock(&sdata->local->mtx); 2623 2624 if (already) 2625 goto out; 2626 2627 mutex_lock(&sdata->local->iflist_mtx); 2628 ieee80211_recalc_ps(sdata->local); 2629 mutex_unlock(&sdata->local->iflist_mtx); 2630 2631 ifmgd->probe_send_count = 0; 2632 ieee80211_mgd_probe_ap_send(sdata); 2633 out: 2634 sdata_unlock(sdata); 2635 } 2636 2637 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2638 struct ieee80211_vif *vif) 2639 { 2640 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2642 struct cfg80211_bss *cbss; 2643 struct sk_buff *skb; 2644 const u8 *ssid; 2645 int ssid_len; 2646 2647 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2648 return NULL; 2649 2650 sdata_assert_lock(sdata); 2651 2652 if (ifmgd->associated) 2653 cbss = ifmgd->associated; 2654 else if (ifmgd->auth_data) 2655 cbss = ifmgd->auth_data->bss; 2656 else if (ifmgd->assoc_data) 2657 cbss = ifmgd->assoc_data->bss; 2658 else 2659 return NULL; 2660 2661 rcu_read_lock(); 2662 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2663 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2664 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2665 ssid_len = 0; 2666 else 2667 ssid_len = ssid[1]; 2668 2669 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2670 (u32) -1, cbss->channel, 2671 ssid + 2, ssid_len, 2672 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2673 rcu_read_unlock(); 2674 2675 return skb; 2676 } 2677 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2678 2679 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2680 const u8 *buf, size_t len, bool tx, 2681 u16 reason) 2682 { 2683 struct ieee80211_event event = { 2684 .type = MLME_EVENT, 2685 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2686 .u.mlme.reason = reason, 2687 }; 2688 2689 if (tx) 2690 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2691 else 2692 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2693 2694 drv_event_callback(sdata->local, sdata, &event); 2695 } 2696 2697 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2698 { 2699 struct ieee80211_local *local = sdata->local; 2700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2701 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2702 bool tx; 2703 2704 sdata_lock(sdata); 2705 if (!ifmgd->associated) { 2706 sdata_unlock(sdata); 2707 return; 2708 } 2709 2710 tx = !sdata->csa_block_tx; 2711 2712 /* AP is probably out of range (or not reachable for another reason) so 2713 * remove the bss struct for that AP. 2714 */ 2715 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2716 2717 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2718 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2719 tx, frame_buf); 2720 mutex_lock(&local->mtx); 2721 sdata->vif.csa_active = false; 2722 ifmgd->csa_waiting_bcn = false; 2723 if (sdata->csa_block_tx) { 2724 ieee80211_wake_vif_queues(local, sdata, 2725 IEEE80211_QUEUE_STOP_REASON_CSA); 2726 sdata->csa_block_tx = false; 2727 } 2728 mutex_unlock(&local->mtx); 2729 2730 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2731 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2732 2733 sdata_unlock(sdata); 2734 } 2735 2736 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2737 { 2738 struct ieee80211_sub_if_data *sdata = 2739 container_of(work, struct ieee80211_sub_if_data, 2740 u.mgd.beacon_connection_loss_work); 2741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2742 2743 if (ifmgd->associated) 2744 ifmgd->beacon_loss_count++; 2745 2746 if (ifmgd->connection_loss) { 2747 sdata_info(sdata, "Connection to AP %pM lost\n", 2748 ifmgd->bssid); 2749 __ieee80211_disconnect(sdata); 2750 } else { 2751 ieee80211_mgd_probe_ap(sdata, true); 2752 } 2753 } 2754 2755 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2756 { 2757 struct ieee80211_sub_if_data *sdata = 2758 container_of(work, struct ieee80211_sub_if_data, 2759 u.mgd.csa_connection_drop_work); 2760 2761 __ieee80211_disconnect(sdata); 2762 } 2763 2764 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2765 { 2766 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2767 struct ieee80211_hw *hw = &sdata->local->hw; 2768 2769 trace_api_beacon_loss(sdata); 2770 2771 sdata->u.mgd.connection_loss = false; 2772 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2773 } 2774 EXPORT_SYMBOL(ieee80211_beacon_loss); 2775 2776 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2777 { 2778 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2779 struct ieee80211_hw *hw = &sdata->local->hw; 2780 2781 trace_api_connection_loss(sdata); 2782 2783 sdata->u.mgd.connection_loss = true; 2784 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2785 } 2786 EXPORT_SYMBOL(ieee80211_connection_loss); 2787 2788 2789 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2790 bool assoc) 2791 { 2792 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2793 2794 sdata_assert_lock(sdata); 2795 2796 if (!assoc) { 2797 /* 2798 * we are not authenticated yet, the only timer that could be 2799 * running is the timeout for the authentication response which 2800 * which is not relevant anymore. 2801 */ 2802 del_timer_sync(&sdata->u.mgd.timer); 2803 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2804 2805 eth_zero_addr(sdata->u.mgd.bssid); 2806 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2807 sdata->u.mgd.flags = 0; 2808 mutex_lock(&sdata->local->mtx); 2809 ieee80211_vif_release_channel(sdata); 2810 mutex_unlock(&sdata->local->mtx); 2811 } 2812 2813 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2814 kfree(auth_data); 2815 sdata->u.mgd.auth_data = NULL; 2816 } 2817 2818 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2819 bool assoc, bool abandon) 2820 { 2821 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2822 2823 sdata_assert_lock(sdata); 2824 2825 if (!assoc) { 2826 /* 2827 * we are not associated yet, the only timer that could be 2828 * running is the timeout for the association response which 2829 * which is not relevant anymore. 2830 */ 2831 del_timer_sync(&sdata->u.mgd.timer); 2832 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2833 2834 eth_zero_addr(sdata->u.mgd.bssid); 2835 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2836 sdata->u.mgd.flags = 0; 2837 sdata->vif.mu_mimo_owner = false; 2838 2839 mutex_lock(&sdata->local->mtx); 2840 ieee80211_vif_release_channel(sdata); 2841 mutex_unlock(&sdata->local->mtx); 2842 2843 if (abandon) 2844 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2845 } 2846 2847 kfree(assoc_data); 2848 sdata->u.mgd.assoc_data = NULL; 2849 } 2850 2851 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2852 struct ieee80211_mgmt *mgmt, size_t len) 2853 { 2854 struct ieee80211_local *local = sdata->local; 2855 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2856 u8 *pos; 2857 struct ieee802_11_elems elems; 2858 u32 tx_flags = 0; 2859 2860 pos = mgmt->u.auth.variable; 2861 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2862 mgmt->bssid, auth_data->bss->bssid); 2863 if (!elems.challenge) 2864 return; 2865 auth_data->expected_transaction = 4; 2866 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2867 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2868 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2869 IEEE80211_TX_INTFL_MLME_CONN_TX; 2870 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2871 elems.challenge - 2, elems.challenge_len + 2, 2872 auth_data->bss->bssid, auth_data->bss->bssid, 2873 auth_data->key, auth_data->key_len, 2874 auth_data->key_idx, tx_flags); 2875 } 2876 2877 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2878 const u8 *bssid) 2879 { 2880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2881 struct sta_info *sta; 2882 bool result = true; 2883 2884 sdata_info(sdata, "authenticated\n"); 2885 ifmgd->auth_data->done = true; 2886 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2887 ifmgd->auth_data->timeout_started = true; 2888 run_again(sdata, ifmgd->auth_data->timeout); 2889 2890 /* move station state to auth */ 2891 mutex_lock(&sdata->local->sta_mtx); 2892 sta = sta_info_get(sdata, bssid); 2893 if (!sta) { 2894 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2895 result = false; 2896 goto out; 2897 } 2898 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2899 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2900 result = false; 2901 goto out; 2902 } 2903 2904 out: 2905 mutex_unlock(&sdata->local->sta_mtx); 2906 return result; 2907 } 2908 2909 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2910 struct ieee80211_mgmt *mgmt, size_t len) 2911 { 2912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2913 u8 bssid[ETH_ALEN]; 2914 u16 auth_alg, auth_transaction, status_code; 2915 struct ieee80211_event event = { 2916 .type = MLME_EVENT, 2917 .u.mlme.data = AUTH_EVENT, 2918 }; 2919 2920 sdata_assert_lock(sdata); 2921 2922 if (len < 24 + 6) 2923 return; 2924 2925 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2926 return; 2927 2928 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2929 2930 if (!ether_addr_equal(bssid, mgmt->bssid)) 2931 return; 2932 2933 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2934 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2935 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2936 2937 if (auth_alg != ifmgd->auth_data->algorithm || 2938 (auth_alg != WLAN_AUTH_SAE && 2939 auth_transaction != ifmgd->auth_data->expected_transaction) || 2940 (auth_alg == WLAN_AUTH_SAE && 2941 (auth_transaction < ifmgd->auth_data->expected_transaction || 2942 auth_transaction > 2))) { 2943 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2944 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2945 auth_transaction, 2946 ifmgd->auth_data->expected_transaction); 2947 return; 2948 } 2949 2950 if (status_code != WLAN_STATUS_SUCCESS) { 2951 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2952 mgmt->sa, status_code); 2953 ieee80211_destroy_auth_data(sdata, false); 2954 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2955 event.u.mlme.status = MLME_DENIED; 2956 event.u.mlme.reason = status_code; 2957 drv_event_callback(sdata->local, sdata, &event); 2958 return; 2959 } 2960 2961 switch (ifmgd->auth_data->algorithm) { 2962 case WLAN_AUTH_OPEN: 2963 case WLAN_AUTH_LEAP: 2964 case WLAN_AUTH_FT: 2965 case WLAN_AUTH_SAE: 2966 case WLAN_AUTH_FILS_SK: 2967 case WLAN_AUTH_FILS_SK_PFS: 2968 case WLAN_AUTH_FILS_PK: 2969 break; 2970 case WLAN_AUTH_SHARED_KEY: 2971 if (ifmgd->auth_data->expected_transaction != 4) { 2972 ieee80211_auth_challenge(sdata, mgmt, len); 2973 /* need another frame */ 2974 return; 2975 } 2976 break; 2977 default: 2978 WARN_ONCE(1, "invalid auth alg %d", 2979 ifmgd->auth_data->algorithm); 2980 return; 2981 } 2982 2983 event.u.mlme.status = MLME_SUCCESS; 2984 drv_event_callback(sdata->local, sdata, &event); 2985 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2986 (auth_transaction == 2 && 2987 ifmgd->auth_data->expected_transaction == 2)) { 2988 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2989 return; /* ignore frame -- wait for timeout */ 2990 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2991 auth_transaction == 2) { 2992 sdata_info(sdata, "SAE peer confirmed\n"); 2993 ifmgd->auth_data->peer_confirmed = true; 2994 } 2995 2996 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2997 } 2998 2999 #define case_WLAN(type) \ 3000 case WLAN_REASON_##type: return #type 3001 3002 const char *ieee80211_get_reason_code_string(u16 reason_code) 3003 { 3004 switch (reason_code) { 3005 case_WLAN(UNSPECIFIED); 3006 case_WLAN(PREV_AUTH_NOT_VALID); 3007 case_WLAN(DEAUTH_LEAVING); 3008 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3009 case_WLAN(DISASSOC_AP_BUSY); 3010 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3011 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3012 case_WLAN(DISASSOC_STA_HAS_LEFT); 3013 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3014 case_WLAN(DISASSOC_BAD_POWER); 3015 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3016 case_WLAN(INVALID_IE); 3017 case_WLAN(MIC_FAILURE); 3018 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3019 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3020 case_WLAN(IE_DIFFERENT); 3021 case_WLAN(INVALID_GROUP_CIPHER); 3022 case_WLAN(INVALID_PAIRWISE_CIPHER); 3023 case_WLAN(INVALID_AKMP); 3024 case_WLAN(UNSUPP_RSN_VERSION); 3025 case_WLAN(INVALID_RSN_IE_CAP); 3026 case_WLAN(IEEE8021X_FAILED); 3027 case_WLAN(CIPHER_SUITE_REJECTED); 3028 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3029 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3030 case_WLAN(DISASSOC_LOW_ACK); 3031 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3032 case_WLAN(QSTA_LEAVE_QBSS); 3033 case_WLAN(QSTA_NOT_USE); 3034 case_WLAN(QSTA_REQUIRE_SETUP); 3035 case_WLAN(QSTA_TIMEOUT); 3036 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3037 case_WLAN(MESH_PEER_CANCELED); 3038 case_WLAN(MESH_MAX_PEERS); 3039 case_WLAN(MESH_CONFIG); 3040 case_WLAN(MESH_CLOSE); 3041 case_WLAN(MESH_MAX_RETRIES); 3042 case_WLAN(MESH_CONFIRM_TIMEOUT); 3043 case_WLAN(MESH_INVALID_GTK); 3044 case_WLAN(MESH_INCONSISTENT_PARAM); 3045 case_WLAN(MESH_INVALID_SECURITY); 3046 case_WLAN(MESH_PATH_ERROR); 3047 case_WLAN(MESH_PATH_NOFORWARD); 3048 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3049 case_WLAN(MAC_EXISTS_IN_MBSS); 3050 case_WLAN(MESH_CHAN_REGULATORY); 3051 case_WLAN(MESH_CHAN); 3052 default: return "<unknown>"; 3053 } 3054 } 3055 3056 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3057 struct ieee80211_mgmt *mgmt, size_t len) 3058 { 3059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3060 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3061 3062 sdata_assert_lock(sdata); 3063 3064 if (len < 24 + 2) 3065 return; 3066 3067 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3068 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3069 return; 3070 } 3071 3072 if (ifmgd->associated && 3073 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3074 const u8 *bssid = ifmgd->associated->bssid; 3075 3076 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3077 bssid, reason_code, 3078 ieee80211_get_reason_code_string(reason_code)); 3079 3080 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3081 3082 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3083 reason_code); 3084 return; 3085 } 3086 3087 if (ifmgd->assoc_data && 3088 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3089 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3090 3091 sdata_info(sdata, 3092 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3093 bssid, reason_code, 3094 ieee80211_get_reason_code_string(reason_code)); 3095 3096 ieee80211_destroy_assoc_data(sdata, false, true); 3097 3098 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3099 return; 3100 } 3101 } 3102 3103 3104 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3105 struct ieee80211_mgmt *mgmt, size_t len) 3106 { 3107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3108 u16 reason_code; 3109 3110 sdata_assert_lock(sdata); 3111 3112 if (len < 24 + 2) 3113 return; 3114 3115 if (!ifmgd->associated || 3116 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3117 return; 3118 3119 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3120 3121 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3122 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3123 return; 3124 } 3125 3126 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3127 mgmt->sa, reason_code, 3128 ieee80211_get_reason_code_string(reason_code)); 3129 3130 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3131 3132 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3133 } 3134 3135 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3136 u8 *supp_rates, unsigned int supp_rates_len, 3137 u32 *rates, u32 *basic_rates, 3138 bool *have_higher_than_11mbit, 3139 int *min_rate, int *min_rate_index, 3140 int shift) 3141 { 3142 int i, j; 3143 3144 for (i = 0; i < supp_rates_len; i++) { 3145 int rate = supp_rates[i] & 0x7f; 3146 bool is_basic = !!(supp_rates[i] & 0x80); 3147 3148 if ((rate * 5 * (1 << shift)) > 110) 3149 *have_higher_than_11mbit = true; 3150 3151 /* 3152 * Skip HT and VHT BSS membership selectors since they're not 3153 * rates. 3154 * 3155 * Note: Even though the membership selector and the basic 3156 * rate flag share the same bit, they are not exactly 3157 * the same. 3158 */ 3159 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3160 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3161 continue; 3162 3163 for (j = 0; j < sband->n_bitrates; j++) { 3164 struct ieee80211_rate *br; 3165 int brate; 3166 3167 br = &sband->bitrates[j]; 3168 3169 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3170 if (brate == rate) { 3171 *rates |= BIT(j); 3172 if (is_basic) 3173 *basic_rates |= BIT(j); 3174 if ((rate * 5) < *min_rate) { 3175 *min_rate = rate * 5; 3176 *min_rate_index = j; 3177 } 3178 break; 3179 } 3180 } 3181 } 3182 } 3183 3184 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3185 const struct ieee802_11_elems *elems) 3186 { 3187 if (elems->ext_capab_len < 10) 3188 return false; 3189 3190 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3191 return false; 3192 3193 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3194 IEEE80211_HE_MAC_CAP0_TWT_RES; 3195 } 3196 3197 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3198 struct sta_info *sta, 3199 struct ieee802_11_elems *elems) 3200 { 3201 bool twt = ieee80211_twt_req_supported(sta, elems); 3202 3203 if (sdata->vif.bss_conf.twt_requester != twt) { 3204 sdata->vif.bss_conf.twt_requester = twt; 3205 return BSS_CHANGED_TWT; 3206 } 3207 return 0; 3208 } 3209 3210 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3211 struct cfg80211_bss *cbss, 3212 struct ieee80211_mgmt *mgmt, size_t len, 3213 struct ieee802_11_elems *elems) 3214 { 3215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3216 struct ieee80211_local *local = sdata->local; 3217 struct ieee80211_supported_band *sband; 3218 struct sta_info *sta; 3219 u16 capab_info, aid; 3220 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3221 const struct cfg80211_bss_ies *bss_ies = NULL; 3222 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3223 u32 changed = 0; 3224 int err; 3225 bool ret; 3226 3227 /* AssocResp and ReassocResp have identical structure */ 3228 3229 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3230 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3231 3232 /* 3233 * The 5 MSB of the AID field are reserved 3234 * (802.11-2016 9.4.1.8 AID field) 3235 */ 3236 aid &= 0x7ff; 3237 3238 ifmgd->broken_ap = false; 3239 3240 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3241 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3242 aid); 3243 aid = 0; 3244 ifmgd->broken_ap = true; 3245 } 3246 3247 if (!elems->supp_rates) { 3248 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3249 return false; 3250 } 3251 3252 ifmgd->aid = aid; 3253 ifmgd->tdls_chan_switch_prohibited = 3254 elems->ext_capab && elems->ext_capab_len >= 5 && 3255 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3256 3257 /* 3258 * Some APs are erroneously not including some information in their 3259 * (re)association response frames. Try to recover by using the data 3260 * from the beacon or probe response. This seems to afflict mobile 3261 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3262 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3263 */ 3264 if ((assoc_data->wmm && !elems->wmm_param) || 3265 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3266 (!elems->ht_cap_elem || !elems->ht_operation)) || 3267 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3268 (!elems->vht_cap_elem || !elems->vht_operation))) { 3269 const struct cfg80211_bss_ies *ies; 3270 struct ieee802_11_elems bss_elems; 3271 3272 rcu_read_lock(); 3273 ies = rcu_dereference(cbss->ies); 3274 if (ies) 3275 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3276 GFP_ATOMIC); 3277 rcu_read_unlock(); 3278 if (!bss_ies) 3279 return false; 3280 3281 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3282 false, &bss_elems, 3283 mgmt->bssid, 3284 assoc_data->bss->bssid); 3285 if (assoc_data->wmm && 3286 !elems->wmm_param && bss_elems.wmm_param) { 3287 elems->wmm_param = bss_elems.wmm_param; 3288 sdata_info(sdata, 3289 "AP bug: WMM param missing from AssocResp\n"); 3290 } 3291 3292 /* 3293 * Also check if we requested HT/VHT, otherwise the AP doesn't 3294 * have to include the IEs in the (re)association response. 3295 */ 3296 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3297 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3298 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3299 sdata_info(sdata, 3300 "AP bug: HT capability missing from AssocResp\n"); 3301 } 3302 if (!elems->ht_operation && bss_elems.ht_operation && 3303 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3304 elems->ht_operation = bss_elems.ht_operation; 3305 sdata_info(sdata, 3306 "AP bug: HT operation missing from AssocResp\n"); 3307 } 3308 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3309 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3310 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3311 sdata_info(sdata, 3312 "AP bug: VHT capa missing from AssocResp\n"); 3313 } 3314 if (!elems->vht_operation && bss_elems.vht_operation && 3315 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3316 elems->vht_operation = bss_elems.vht_operation; 3317 sdata_info(sdata, 3318 "AP bug: VHT operation missing from AssocResp\n"); 3319 } 3320 } 3321 3322 /* 3323 * We previously checked these in the beacon/probe response, so 3324 * they should be present here. This is just a safety net. 3325 */ 3326 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3327 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3328 sdata_info(sdata, 3329 "HT AP is missing WMM params or HT capability/operation\n"); 3330 ret = false; 3331 goto out; 3332 } 3333 3334 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3335 (!elems->vht_cap_elem || !elems->vht_operation)) { 3336 sdata_info(sdata, 3337 "VHT AP is missing VHT capability/operation\n"); 3338 ret = false; 3339 goto out; 3340 } 3341 3342 mutex_lock(&sdata->local->sta_mtx); 3343 /* 3344 * station info was already allocated and inserted before 3345 * the association and should be available to us 3346 */ 3347 sta = sta_info_get(sdata, cbss->bssid); 3348 if (WARN_ON(!sta)) { 3349 mutex_unlock(&sdata->local->sta_mtx); 3350 ret = false; 3351 goto out; 3352 } 3353 3354 sband = ieee80211_get_sband(sdata); 3355 if (!sband) { 3356 mutex_unlock(&sdata->local->sta_mtx); 3357 ret = false; 3358 goto out; 3359 } 3360 3361 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3362 (!elems->he_cap || !elems->he_operation)) { 3363 mutex_unlock(&sdata->local->sta_mtx); 3364 sdata_info(sdata, 3365 "HE AP is missing HE capability/operation\n"); 3366 ret = false; 3367 goto out; 3368 } 3369 3370 /* Set up internal HT/VHT capabilities */ 3371 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3372 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3373 elems->ht_cap_elem, sta); 3374 3375 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3376 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3377 elems->vht_cap_elem, sta); 3378 3379 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3380 elems->he_cap) { 3381 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3382 elems->he_cap, 3383 elems->he_cap_len, 3384 sta); 3385 3386 bss_conf->he_support = sta->sta.he_cap.has_he; 3387 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3388 } else { 3389 bss_conf->he_support = false; 3390 bss_conf->twt_requester = false; 3391 } 3392 3393 if (bss_conf->he_support) { 3394 bss_conf->he_bss_color.color = 3395 le32_get_bits(elems->he_operation->he_oper_params, 3396 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3397 bss_conf->he_bss_color.partial = 3398 le32_get_bits(elems->he_operation->he_oper_params, 3399 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3400 bss_conf->he_bss_color.disabled = 3401 le32_get_bits(elems->he_operation->he_oper_params, 3402 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3403 changed |= BSS_CHANGED_HE_BSS_COLOR; 3404 3405 bss_conf->htc_trig_based_pkt_ext = 3406 le32_get_bits(elems->he_operation->he_oper_params, 3407 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3408 bss_conf->frame_time_rts_th = 3409 le32_get_bits(elems->he_operation->he_oper_params, 3410 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3411 3412 bss_conf->multi_sta_back_32bit = 3413 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3414 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3415 3416 bss_conf->ack_enabled = 3417 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3418 IEEE80211_HE_MAC_CAP2_ACK_EN; 3419 3420 bss_conf->uora_exists = !!elems->uora_element; 3421 if (elems->uora_element) 3422 bss_conf->uora_ocw_range = elems->uora_element[0]; 3423 3424 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3425 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3426 /* TODO: OPEN: what happens if BSS color disable is set? */ 3427 } 3428 3429 if (cbss->transmitted_bss) { 3430 bss_conf->nontransmitted = true; 3431 ether_addr_copy(bss_conf->transmitter_bssid, 3432 cbss->transmitted_bss->bssid); 3433 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3434 bss_conf->bssid_index = cbss->bssid_index; 3435 } 3436 3437 /* 3438 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3439 * in their association response, so ignore that data for our own 3440 * configuration. If it changed since the last beacon, we'll get the 3441 * next beacon and update then. 3442 */ 3443 3444 /* 3445 * If an operating mode notification IE is present, override the 3446 * NSS calculation (that would be done in rate_control_rate_init()) 3447 * and use the # of streams from that element. 3448 */ 3449 if (elems->opmode_notif && 3450 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3451 u8 nss; 3452 3453 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3454 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3455 nss += 1; 3456 sta->sta.rx_nss = nss; 3457 } 3458 3459 rate_control_rate_init(sta); 3460 3461 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3462 set_sta_flag(sta, WLAN_STA_MFP); 3463 sta->sta.mfp = true; 3464 } else { 3465 sta->sta.mfp = false; 3466 } 3467 3468 sta->sta.wme = elems->wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3469 3470 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3471 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3472 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3473 if (err) { 3474 sdata_info(sdata, 3475 "failed to move station %pM to desired state\n", 3476 sta->sta.addr); 3477 WARN_ON(__sta_info_destroy(sta)); 3478 mutex_unlock(&sdata->local->sta_mtx); 3479 ret = false; 3480 goto out; 3481 } 3482 3483 mutex_unlock(&sdata->local->sta_mtx); 3484 3485 /* 3486 * Always handle WMM once after association regardless 3487 * of the first value the AP uses. Setting -1 here has 3488 * that effect because the AP values is an unsigned 3489 * 4-bit value. 3490 */ 3491 ifmgd->wmm_last_param_set = -1; 3492 ifmgd->mu_edca_last_param_set = -1; 3493 3494 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3495 ieee80211_set_wmm_default(sdata, false, false); 3496 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3497 elems->wmm_param_len, 3498 elems->mu_edca_param_set)) { 3499 /* still enable QoS since we might have HT/VHT */ 3500 ieee80211_set_wmm_default(sdata, false, true); 3501 /* set the disable-WMM flag in this case to disable 3502 * tracking WMM parameter changes in the beacon if 3503 * the parameters weren't actually valid. Doing so 3504 * avoids changing parameters very strangely when 3505 * the AP is going back and forth between valid and 3506 * invalid parameters. 3507 */ 3508 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3509 } 3510 changed |= BSS_CHANGED_QOS; 3511 3512 if (elems->max_idle_period_ie) { 3513 bss_conf->max_idle_period = 3514 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3515 bss_conf->protected_keep_alive = 3516 !!(elems->max_idle_period_ie->idle_options & 3517 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3518 changed |= BSS_CHANGED_KEEP_ALIVE; 3519 } else { 3520 bss_conf->max_idle_period = 0; 3521 bss_conf->protected_keep_alive = false; 3522 } 3523 3524 /* set AID and assoc capability, 3525 * ieee80211_set_associated() will tell the driver */ 3526 bss_conf->aid = aid; 3527 bss_conf->assoc_capability = capab_info; 3528 ieee80211_set_associated(sdata, cbss, changed); 3529 3530 /* 3531 * If we're using 4-addr mode, let the AP know that we're 3532 * doing so, so that it can create the STA VLAN on its side 3533 */ 3534 if (ifmgd->use_4addr) 3535 ieee80211_send_4addr_nullfunc(local, sdata); 3536 3537 /* 3538 * Start timer to probe the connection to the AP now. 3539 * Also start the timer that will detect beacon loss. 3540 */ 3541 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3542 ieee80211_sta_reset_beacon_monitor(sdata); 3543 3544 ret = true; 3545 out: 3546 kfree(bss_ies); 3547 return ret; 3548 } 3549 3550 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3551 struct ieee80211_mgmt *mgmt, 3552 size_t len) 3553 { 3554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3555 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3556 u16 capab_info, status_code, aid; 3557 struct ieee802_11_elems elems; 3558 int ac, uapsd_queues = -1; 3559 u8 *pos; 3560 bool reassoc; 3561 struct cfg80211_bss *bss; 3562 struct ieee80211_event event = { 3563 .type = MLME_EVENT, 3564 .u.mlme.data = ASSOC_EVENT, 3565 }; 3566 3567 sdata_assert_lock(sdata); 3568 3569 if (!assoc_data) 3570 return; 3571 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3572 return; 3573 3574 /* 3575 * AssocResp and ReassocResp have identical structure, so process both 3576 * of them in this function. 3577 */ 3578 3579 if (len < 24 + 6) 3580 return; 3581 3582 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3583 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3584 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3585 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3586 3587 sdata_info(sdata, 3588 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3589 reassoc ? "Rea" : "A", mgmt->sa, 3590 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3591 3592 if (assoc_data->fils_kek_len && 3593 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3594 return; 3595 3596 pos = mgmt->u.assoc_resp.variable; 3597 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3598 mgmt->bssid, assoc_data->bss->bssid); 3599 3600 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3601 elems.timeout_int && 3602 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3603 u32 tu, ms; 3604 tu = le32_to_cpu(elems.timeout_int->value); 3605 ms = tu * 1024 / 1000; 3606 sdata_info(sdata, 3607 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3608 mgmt->sa, tu, ms); 3609 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3610 assoc_data->timeout_started = true; 3611 if (ms > IEEE80211_ASSOC_TIMEOUT) 3612 run_again(sdata, assoc_data->timeout); 3613 return; 3614 } 3615 3616 bss = assoc_data->bss; 3617 3618 if (status_code != WLAN_STATUS_SUCCESS) { 3619 sdata_info(sdata, "%pM denied association (code=%d)\n", 3620 mgmt->sa, status_code); 3621 ieee80211_destroy_assoc_data(sdata, false, false); 3622 event.u.mlme.status = MLME_DENIED; 3623 event.u.mlme.reason = status_code; 3624 drv_event_callback(sdata->local, sdata, &event); 3625 } else { 3626 if (!ieee80211_assoc_success(sdata, bss, mgmt, len, &elems)) { 3627 /* oops -- internal error -- send timeout for now */ 3628 ieee80211_destroy_assoc_data(sdata, false, false); 3629 cfg80211_assoc_timeout(sdata->dev, bss); 3630 return; 3631 } 3632 event.u.mlme.status = MLME_SUCCESS; 3633 drv_event_callback(sdata->local, sdata, &event); 3634 sdata_info(sdata, "associated\n"); 3635 3636 /* 3637 * destroy assoc_data afterwards, as otherwise an idle 3638 * recalc after assoc_data is NULL but before associated 3639 * is set can cause the interface to go idle 3640 */ 3641 ieee80211_destroy_assoc_data(sdata, true, false); 3642 3643 /* get uapsd queues configuration */ 3644 uapsd_queues = 0; 3645 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3646 if (sdata->tx_conf[ac].uapsd) 3647 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3648 } 3649 3650 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3651 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3652 } 3653 3654 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3655 struct ieee80211_mgmt *mgmt, size_t len, 3656 struct ieee80211_rx_status *rx_status) 3657 { 3658 struct ieee80211_local *local = sdata->local; 3659 struct ieee80211_bss *bss; 3660 struct ieee80211_channel *channel; 3661 3662 sdata_assert_lock(sdata); 3663 3664 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3665 if (!channel) 3666 return; 3667 3668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3669 if (bss) { 3670 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3671 ieee80211_rx_bss_put(local, bss); 3672 } 3673 } 3674 3675 3676 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3677 struct sk_buff *skb) 3678 { 3679 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3680 struct ieee80211_if_managed *ifmgd; 3681 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3682 struct ieee80211_channel *channel; 3683 size_t baselen, len = skb->len; 3684 3685 ifmgd = &sdata->u.mgd; 3686 3687 sdata_assert_lock(sdata); 3688 3689 /* 3690 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3691 * "If a 6 GHz AP receives a Probe Request frame and responds with 3692 * a Probe Response frame [..], the Address 1 field of the Probe 3693 * Response frame shall be set to the broadcast address [..]" 3694 * So, on 6GHz band we should also accept broadcast responses. 3695 */ 3696 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3697 rx_status->freq); 3698 if (!channel) 3699 return; 3700 3701 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3702 (channel->band != NL80211_BAND_6GHZ || 3703 !is_broadcast_ether_addr(mgmt->da))) 3704 return; /* ignore ProbeResp to foreign address */ 3705 3706 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3707 if (baselen > len) 3708 return; 3709 3710 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3711 3712 if (ifmgd->associated && 3713 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3714 ieee80211_reset_ap_probe(sdata); 3715 } 3716 3717 /* 3718 * This is the canonical list of information elements we care about, 3719 * the filter code also gives us all changes to the Microsoft OUI 3720 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3721 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3722 * changes to requested client power. 3723 * 3724 * We implement beacon filtering in software since that means we can 3725 * avoid processing the frame here and in cfg80211, and userspace 3726 * will not be able to tell whether the hardware supports it or not. 3727 * 3728 * XXX: This list needs to be dynamic -- userspace needs to be able to 3729 * add items it requires. It also needs to be able to tell us to 3730 * look out for other vendor IEs. 3731 */ 3732 static const u64 care_about_ies = 3733 (1ULL << WLAN_EID_COUNTRY) | 3734 (1ULL << WLAN_EID_ERP_INFO) | 3735 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3736 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3737 (1ULL << WLAN_EID_HT_CAPABILITY) | 3738 (1ULL << WLAN_EID_HT_OPERATION) | 3739 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3740 3741 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3742 struct ieee80211_if_managed *ifmgd, 3743 struct ieee80211_bss_conf *bss_conf, 3744 struct ieee80211_local *local, 3745 struct ieee80211_rx_status *rx_status) 3746 { 3747 /* Track average RSSI from the Beacon frames of the current AP */ 3748 3749 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3750 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3751 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3752 ifmgd->last_cqm_event_signal = 0; 3753 ifmgd->count_beacon_signal = 1; 3754 ifmgd->last_ave_beacon_signal = 0; 3755 } else { 3756 ifmgd->count_beacon_signal++; 3757 } 3758 3759 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3760 3761 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3762 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3763 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3764 int last_sig = ifmgd->last_ave_beacon_signal; 3765 struct ieee80211_event event = { 3766 .type = RSSI_EVENT, 3767 }; 3768 3769 /* 3770 * if signal crosses either of the boundaries, invoke callback 3771 * with appropriate parameters 3772 */ 3773 if (sig > ifmgd->rssi_max_thold && 3774 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3775 ifmgd->last_ave_beacon_signal = sig; 3776 event.u.rssi.data = RSSI_EVENT_HIGH; 3777 drv_event_callback(local, sdata, &event); 3778 } else if (sig < ifmgd->rssi_min_thold && 3779 (last_sig >= ifmgd->rssi_max_thold || 3780 last_sig == 0)) { 3781 ifmgd->last_ave_beacon_signal = sig; 3782 event.u.rssi.data = RSSI_EVENT_LOW; 3783 drv_event_callback(local, sdata, &event); 3784 } 3785 } 3786 3787 if (bss_conf->cqm_rssi_thold && 3788 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3789 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3790 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3791 int last_event = ifmgd->last_cqm_event_signal; 3792 int thold = bss_conf->cqm_rssi_thold; 3793 int hyst = bss_conf->cqm_rssi_hyst; 3794 3795 if (sig < thold && 3796 (last_event == 0 || sig < last_event - hyst)) { 3797 ifmgd->last_cqm_event_signal = sig; 3798 ieee80211_cqm_rssi_notify( 3799 &sdata->vif, 3800 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3801 sig, GFP_KERNEL); 3802 } else if (sig > thold && 3803 (last_event == 0 || sig > last_event + hyst)) { 3804 ifmgd->last_cqm_event_signal = sig; 3805 ieee80211_cqm_rssi_notify( 3806 &sdata->vif, 3807 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3808 sig, GFP_KERNEL); 3809 } 3810 } 3811 3812 if (bss_conf->cqm_rssi_low && 3813 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3814 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3815 int last_event = ifmgd->last_cqm_event_signal; 3816 int low = bss_conf->cqm_rssi_low; 3817 int high = bss_conf->cqm_rssi_high; 3818 3819 if (sig < low && 3820 (last_event == 0 || last_event >= low)) { 3821 ifmgd->last_cqm_event_signal = sig; 3822 ieee80211_cqm_rssi_notify( 3823 &sdata->vif, 3824 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3825 sig, GFP_KERNEL); 3826 } else if (sig > high && 3827 (last_event == 0 || last_event <= high)) { 3828 ifmgd->last_cqm_event_signal = sig; 3829 ieee80211_cqm_rssi_notify( 3830 &sdata->vif, 3831 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3832 sig, GFP_KERNEL); 3833 } 3834 } 3835 } 3836 3837 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3838 struct cfg80211_bss *bss) 3839 { 3840 if (ether_addr_equal(tx_bssid, bss->bssid)) 3841 return true; 3842 if (!bss->transmitted_bss) 3843 return false; 3844 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3845 } 3846 3847 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3848 struct ieee80211_mgmt *mgmt, size_t len, 3849 struct ieee80211_rx_status *rx_status) 3850 { 3851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3852 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3853 size_t baselen; 3854 struct ieee802_11_elems elems; 3855 struct ieee80211_local *local = sdata->local; 3856 struct ieee80211_chanctx_conf *chanctx_conf; 3857 struct ieee80211_channel *chan; 3858 struct sta_info *sta; 3859 u32 changed = 0; 3860 bool erp_valid; 3861 u8 erp_value = 0; 3862 u32 ncrc; 3863 u8 *bssid; 3864 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3865 3866 sdata_assert_lock(sdata); 3867 3868 /* Process beacon from the current BSS */ 3869 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3870 if (baselen > len) 3871 return; 3872 3873 rcu_read_lock(); 3874 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3875 if (!chanctx_conf) { 3876 rcu_read_unlock(); 3877 return; 3878 } 3879 3880 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3881 rcu_read_unlock(); 3882 return; 3883 } 3884 chan = chanctx_conf->def.chan; 3885 rcu_read_unlock(); 3886 3887 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3888 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3889 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3890 len - baselen, false, &elems, 3891 mgmt->bssid, 3892 ifmgd->assoc_data->bss->bssid); 3893 3894 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3895 3896 if (elems.dtim_period) 3897 ifmgd->dtim_period = elems.dtim_period; 3898 ifmgd->have_beacon = true; 3899 ifmgd->assoc_data->need_beacon = false; 3900 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3901 sdata->vif.bss_conf.sync_tsf = 3902 le64_to_cpu(mgmt->u.beacon.timestamp); 3903 sdata->vif.bss_conf.sync_device_ts = 3904 rx_status->device_timestamp; 3905 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3906 } 3907 3908 if (elems.mbssid_config_ie) 3909 bss_conf->profile_periodicity = 3910 elems.mbssid_config_ie->profile_periodicity; 3911 3912 if (elems.ext_capab_len >= 11 && 3913 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3914 bss_conf->ema_ap = true; 3915 3916 /* continue assoc process */ 3917 ifmgd->assoc_data->timeout = jiffies; 3918 ifmgd->assoc_data->timeout_started = true; 3919 run_again(sdata, ifmgd->assoc_data->timeout); 3920 return; 3921 } 3922 3923 if (!ifmgd->associated || 3924 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3925 return; 3926 bssid = ifmgd->associated->bssid; 3927 3928 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3929 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3930 local, rx_status); 3931 3932 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3933 mlme_dbg_ratelimited(sdata, 3934 "cancelling AP probe due to a received beacon\n"); 3935 ieee80211_reset_ap_probe(sdata); 3936 } 3937 3938 /* 3939 * Push the beacon loss detection into the future since 3940 * we are processing a beacon from the AP just now. 3941 */ 3942 ieee80211_sta_reset_beacon_monitor(sdata); 3943 3944 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3945 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3946 len - baselen, false, &elems, 3947 care_about_ies, ncrc, 3948 mgmt->bssid, bssid); 3949 3950 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3951 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3952 if (local->hw.conf.dynamic_ps_timeout > 0) { 3953 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3954 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3955 ieee80211_hw_config(local, 3956 IEEE80211_CONF_CHANGE_PS); 3957 } 3958 ieee80211_send_nullfunc(local, sdata, false); 3959 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3960 local->pspolling = true; 3961 3962 /* 3963 * Here is assumed that the driver will be 3964 * able to send ps-poll frame and receive a 3965 * response even though power save mode is 3966 * enabled, but some drivers might require 3967 * to disable power save here. This needs 3968 * to be investigated. 3969 */ 3970 ieee80211_send_pspoll(local, sdata); 3971 } 3972 } 3973 3974 if (sdata->vif.p2p || 3975 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3976 struct ieee80211_p2p_noa_attr noa = {}; 3977 int ret; 3978 3979 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3980 len - baselen, 3981 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3982 (u8 *) &noa, sizeof(noa)); 3983 if (ret >= 2) { 3984 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3985 /* valid noa_attr and index changed */ 3986 sdata->u.mgd.p2p_noa_index = noa.index; 3987 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3988 changed |= BSS_CHANGED_P2P_PS; 3989 /* 3990 * make sure we update all information, the CRC 3991 * mechanism doesn't look at P2P attributes. 3992 */ 3993 ifmgd->beacon_crc_valid = false; 3994 } 3995 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3996 /* noa_attr not found and we had valid noa_attr before */ 3997 sdata->u.mgd.p2p_noa_index = -1; 3998 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3999 changed |= BSS_CHANGED_P2P_PS; 4000 ifmgd->beacon_crc_valid = false; 4001 } 4002 } 4003 4004 if (ifmgd->csa_waiting_bcn) 4005 ieee80211_chswitch_post_beacon(sdata); 4006 4007 /* 4008 * Update beacon timing and dtim count on every beacon appearance. This 4009 * will allow the driver to use the most updated values. Do it before 4010 * comparing this one with last received beacon. 4011 * IMPORTANT: These parameters would possibly be out of sync by the time 4012 * the driver will use them. The synchronized view is currently 4013 * guaranteed only in certain callbacks. 4014 */ 4015 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4016 sdata->vif.bss_conf.sync_tsf = 4017 le64_to_cpu(mgmt->u.beacon.timestamp); 4018 sdata->vif.bss_conf.sync_device_ts = 4019 rx_status->device_timestamp; 4020 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4021 } 4022 4023 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 4024 return; 4025 ifmgd->beacon_crc = ncrc; 4026 ifmgd->beacon_crc_valid = true; 4027 4028 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4029 4030 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4031 rx_status->device_timestamp, 4032 &elems, true); 4033 4034 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4035 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4036 elems.wmm_param_len, 4037 elems.mu_edca_param_set)) 4038 changed |= BSS_CHANGED_QOS; 4039 4040 /* 4041 * If we haven't had a beacon before, tell the driver about the 4042 * DTIM period (and beacon timing if desired) now. 4043 */ 4044 if (!ifmgd->have_beacon) { 4045 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4046 bss_conf->dtim_period = elems.dtim_period ?: 1; 4047 4048 changed |= BSS_CHANGED_BEACON_INFO; 4049 ifmgd->have_beacon = true; 4050 4051 mutex_lock(&local->iflist_mtx); 4052 ieee80211_recalc_ps(local); 4053 mutex_unlock(&local->iflist_mtx); 4054 4055 ieee80211_recalc_ps_vif(sdata); 4056 } 4057 4058 if (elems.erp_info) { 4059 erp_valid = true; 4060 erp_value = elems.erp_info[0]; 4061 } else { 4062 erp_valid = false; 4063 } 4064 changed |= ieee80211_handle_bss_capability(sdata, 4065 le16_to_cpu(mgmt->u.beacon.capab_info), 4066 erp_valid, erp_value); 4067 4068 mutex_lock(&local->sta_mtx); 4069 sta = sta_info_get(sdata, bssid); 4070 4071 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4072 4073 if (ieee80211_config_bw(sdata, sta, 4074 elems.ht_cap_elem, elems.ht_operation, 4075 elems.vht_operation, elems.he_operation, 4076 bssid, &changed)) { 4077 mutex_unlock(&local->sta_mtx); 4078 sdata_info(sdata, 4079 "failed to follow AP %pM bandwidth change, disconnect\n", 4080 bssid); 4081 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4082 WLAN_REASON_DEAUTH_LEAVING, 4083 true, deauth_buf); 4084 ieee80211_report_disconnect(sdata, deauth_buf, 4085 sizeof(deauth_buf), true, 4086 WLAN_REASON_DEAUTH_LEAVING); 4087 return; 4088 } 4089 4090 if (sta && elems.opmode_notif) 4091 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4092 rx_status->band); 4093 mutex_unlock(&local->sta_mtx); 4094 4095 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4096 elems.country_elem, 4097 elems.country_elem_len, 4098 elems.pwr_constr_elem, 4099 elems.cisco_dtpc_elem); 4100 4101 ieee80211_bss_info_change_notify(sdata, changed); 4102 } 4103 4104 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4105 struct sk_buff *skb) 4106 { 4107 struct ieee80211_rx_status *rx_status; 4108 struct ieee80211_mgmt *mgmt; 4109 u16 fc; 4110 struct ieee802_11_elems elems; 4111 int ies_len; 4112 4113 rx_status = (struct ieee80211_rx_status *) skb->cb; 4114 mgmt = (struct ieee80211_mgmt *) skb->data; 4115 fc = le16_to_cpu(mgmt->frame_control); 4116 4117 sdata_lock(sdata); 4118 4119 switch (fc & IEEE80211_FCTL_STYPE) { 4120 case IEEE80211_STYPE_BEACON: 4121 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4122 break; 4123 case IEEE80211_STYPE_PROBE_RESP: 4124 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4125 break; 4126 case IEEE80211_STYPE_AUTH: 4127 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4128 break; 4129 case IEEE80211_STYPE_DEAUTH: 4130 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4131 break; 4132 case IEEE80211_STYPE_DISASSOC: 4133 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4134 break; 4135 case IEEE80211_STYPE_ASSOC_RESP: 4136 case IEEE80211_STYPE_REASSOC_RESP: 4137 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4138 break; 4139 case IEEE80211_STYPE_ACTION: 4140 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4141 ies_len = skb->len - 4142 offsetof(struct ieee80211_mgmt, 4143 u.action.u.chan_switch.variable); 4144 4145 if (ies_len < 0) 4146 break; 4147 4148 /* CSA IE cannot be overridden, no need for BSSID */ 4149 ieee802_11_parse_elems( 4150 mgmt->u.action.u.chan_switch.variable, 4151 ies_len, true, &elems, mgmt->bssid, NULL); 4152 4153 if (elems.parse_error) 4154 break; 4155 4156 ieee80211_sta_process_chanswitch(sdata, 4157 rx_status->mactime, 4158 rx_status->device_timestamp, 4159 &elems, false); 4160 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4161 ies_len = skb->len - 4162 offsetof(struct ieee80211_mgmt, 4163 u.action.u.ext_chan_switch.variable); 4164 4165 if (ies_len < 0) 4166 break; 4167 4168 /* 4169 * extended CSA IE can't be overridden, no need for 4170 * BSSID 4171 */ 4172 ieee802_11_parse_elems( 4173 mgmt->u.action.u.ext_chan_switch.variable, 4174 ies_len, true, &elems, mgmt->bssid, NULL); 4175 4176 if (elems.parse_error) 4177 break; 4178 4179 /* for the handling code pretend this was also an IE */ 4180 elems.ext_chansw_ie = 4181 &mgmt->u.action.u.ext_chan_switch.data; 4182 4183 ieee80211_sta_process_chanswitch(sdata, 4184 rx_status->mactime, 4185 rx_status->device_timestamp, 4186 &elems, false); 4187 } 4188 break; 4189 } 4190 sdata_unlock(sdata); 4191 } 4192 4193 static void ieee80211_sta_timer(struct timer_list *t) 4194 { 4195 struct ieee80211_sub_if_data *sdata = 4196 from_timer(sdata, t, u.mgd.timer); 4197 4198 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4199 } 4200 4201 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4202 u8 *bssid, u8 reason, bool tx) 4203 { 4204 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4205 4206 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4207 tx, frame_buf); 4208 4209 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4210 reason); 4211 } 4212 4213 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4214 { 4215 struct ieee80211_local *local = sdata->local; 4216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4217 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4218 u32 tx_flags = 0; 4219 u16 trans = 1; 4220 u16 status = 0; 4221 u16 prepare_tx_duration = 0; 4222 4223 sdata_assert_lock(sdata); 4224 4225 if (WARN_ON_ONCE(!auth_data)) 4226 return -EINVAL; 4227 4228 auth_data->tries++; 4229 4230 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4231 sdata_info(sdata, "authentication with %pM timed out\n", 4232 auth_data->bss->bssid); 4233 4234 /* 4235 * Most likely AP is not in the range so remove the 4236 * bss struct for that AP. 4237 */ 4238 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4239 4240 return -ETIMEDOUT; 4241 } 4242 4243 if (auth_data->algorithm == WLAN_AUTH_SAE) 4244 prepare_tx_duration = 4245 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4246 4247 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4248 4249 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4250 auth_data->bss->bssid, auth_data->tries, 4251 IEEE80211_AUTH_MAX_TRIES); 4252 4253 auth_data->expected_transaction = 2; 4254 4255 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4256 trans = auth_data->sae_trans; 4257 status = auth_data->sae_status; 4258 auth_data->expected_transaction = trans; 4259 } 4260 4261 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4262 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4263 IEEE80211_TX_INTFL_MLME_CONN_TX; 4264 4265 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4266 auth_data->data, auth_data->data_len, 4267 auth_data->bss->bssid, 4268 auth_data->bss->bssid, NULL, 0, 0, 4269 tx_flags); 4270 4271 if (tx_flags == 0) { 4272 if (auth_data->algorithm == WLAN_AUTH_SAE) 4273 auth_data->timeout = jiffies + 4274 IEEE80211_AUTH_TIMEOUT_SAE; 4275 else 4276 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4277 } else { 4278 auth_data->timeout = 4279 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4280 } 4281 4282 auth_data->timeout_started = true; 4283 run_again(sdata, auth_data->timeout); 4284 4285 return 0; 4286 } 4287 4288 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4289 { 4290 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4291 struct ieee80211_local *local = sdata->local; 4292 4293 sdata_assert_lock(sdata); 4294 4295 assoc_data->tries++; 4296 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4297 sdata_info(sdata, "association with %pM timed out\n", 4298 assoc_data->bss->bssid); 4299 4300 /* 4301 * Most likely AP is not in the range so remove the 4302 * bss struct for that AP. 4303 */ 4304 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4305 4306 return -ETIMEDOUT; 4307 } 4308 4309 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4310 assoc_data->bss->bssid, assoc_data->tries, 4311 IEEE80211_ASSOC_MAX_TRIES); 4312 ieee80211_send_assoc(sdata); 4313 4314 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4315 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4316 assoc_data->timeout_started = true; 4317 run_again(sdata, assoc_data->timeout); 4318 } else { 4319 assoc_data->timeout = 4320 round_jiffies_up(jiffies + 4321 IEEE80211_ASSOC_TIMEOUT_LONG); 4322 assoc_data->timeout_started = true; 4323 run_again(sdata, assoc_data->timeout); 4324 } 4325 4326 return 0; 4327 } 4328 4329 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4330 __le16 fc, bool acked) 4331 { 4332 struct ieee80211_local *local = sdata->local; 4333 4334 sdata->u.mgd.status_fc = fc; 4335 sdata->u.mgd.status_acked = acked; 4336 sdata->u.mgd.status_received = true; 4337 4338 ieee80211_queue_work(&local->hw, &sdata->work); 4339 } 4340 4341 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4342 { 4343 struct ieee80211_local *local = sdata->local; 4344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4345 4346 sdata_lock(sdata); 4347 4348 if (ifmgd->status_received) { 4349 __le16 fc = ifmgd->status_fc; 4350 bool status_acked = ifmgd->status_acked; 4351 4352 ifmgd->status_received = false; 4353 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4354 if (status_acked) { 4355 if (ifmgd->auth_data->algorithm == 4356 WLAN_AUTH_SAE) 4357 ifmgd->auth_data->timeout = 4358 jiffies + 4359 IEEE80211_AUTH_TIMEOUT_SAE; 4360 else 4361 ifmgd->auth_data->timeout = 4362 jiffies + 4363 IEEE80211_AUTH_TIMEOUT_SHORT; 4364 run_again(sdata, ifmgd->auth_data->timeout); 4365 } else { 4366 ifmgd->auth_data->timeout = jiffies - 1; 4367 } 4368 ifmgd->auth_data->timeout_started = true; 4369 } else if (ifmgd->assoc_data && 4370 (ieee80211_is_assoc_req(fc) || 4371 ieee80211_is_reassoc_req(fc))) { 4372 if (status_acked) { 4373 ifmgd->assoc_data->timeout = 4374 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4375 run_again(sdata, ifmgd->assoc_data->timeout); 4376 } else { 4377 ifmgd->assoc_data->timeout = jiffies - 1; 4378 } 4379 ifmgd->assoc_data->timeout_started = true; 4380 } 4381 } 4382 4383 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4384 time_after(jiffies, ifmgd->auth_data->timeout)) { 4385 if (ifmgd->auth_data->done) { 4386 /* 4387 * ok ... we waited for assoc but userspace didn't, 4388 * so let's just kill the auth data 4389 */ 4390 ieee80211_destroy_auth_data(sdata, false); 4391 } else if (ieee80211_auth(sdata)) { 4392 u8 bssid[ETH_ALEN]; 4393 struct ieee80211_event event = { 4394 .type = MLME_EVENT, 4395 .u.mlme.data = AUTH_EVENT, 4396 .u.mlme.status = MLME_TIMEOUT, 4397 }; 4398 4399 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4400 4401 ieee80211_destroy_auth_data(sdata, false); 4402 4403 cfg80211_auth_timeout(sdata->dev, bssid); 4404 drv_event_callback(sdata->local, sdata, &event); 4405 } 4406 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4407 run_again(sdata, ifmgd->auth_data->timeout); 4408 4409 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4410 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4411 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4412 ieee80211_do_assoc(sdata)) { 4413 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4414 struct ieee80211_event event = { 4415 .type = MLME_EVENT, 4416 .u.mlme.data = ASSOC_EVENT, 4417 .u.mlme.status = MLME_TIMEOUT, 4418 }; 4419 4420 ieee80211_destroy_assoc_data(sdata, false, false); 4421 cfg80211_assoc_timeout(sdata->dev, bss); 4422 drv_event_callback(sdata->local, sdata, &event); 4423 } 4424 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4425 run_again(sdata, ifmgd->assoc_data->timeout); 4426 4427 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4428 ifmgd->associated) { 4429 u8 bssid[ETH_ALEN]; 4430 int max_tries; 4431 4432 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4433 4434 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4435 max_tries = max_nullfunc_tries; 4436 else 4437 max_tries = max_probe_tries; 4438 4439 /* ACK received for nullfunc probing frame */ 4440 if (!ifmgd->probe_send_count) 4441 ieee80211_reset_ap_probe(sdata); 4442 else if (ifmgd->nullfunc_failed) { 4443 if (ifmgd->probe_send_count < max_tries) { 4444 mlme_dbg(sdata, 4445 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4446 bssid, ifmgd->probe_send_count, 4447 max_tries); 4448 ieee80211_mgd_probe_ap_send(sdata); 4449 } else { 4450 mlme_dbg(sdata, 4451 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4452 bssid); 4453 ieee80211_sta_connection_lost(sdata, bssid, 4454 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4455 false); 4456 } 4457 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4458 run_again(sdata, ifmgd->probe_timeout); 4459 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4460 mlme_dbg(sdata, 4461 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4462 bssid, probe_wait_ms); 4463 ieee80211_sta_connection_lost(sdata, bssid, 4464 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4465 } else if (ifmgd->probe_send_count < max_tries) { 4466 mlme_dbg(sdata, 4467 "No probe response from AP %pM after %dms, try %d/%i\n", 4468 bssid, probe_wait_ms, 4469 ifmgd->probe_send_count, max_tries); 4470 ieee80211_mgd_probe_ap_send(sdata); 4471 } else { 4472 /* 4473 * We actually lost the connection ... or did we? 4474 * Let's make sure! 4475 */ 4476 mlme_dbg(sdata, 4477 "No probe response from AP %pM after %dms, disconnecting.\n", 4478 bssid, probe_wait_ms); 4479 4480 ieee80211_sta_connection_lost(sdata, bssid, 4481 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4482 } 4483 } 4484 4485 sdata_unlock(sdata); 4486 } 4487 4488 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4489 { 4490 struct ieee80211_sub_if_data *sdata = 4491 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4493 4494 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4495 return; 4496 4497 sdata->u.mgd.connection_loss = false; 4498 ieee80211_queue_work(&sdata->local->hw, 4499 &sdata->u.mgd.beacon_connection_loss_work); 4500 } 4501 4502 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4503 { 4504 struct ieee80211_sub_if_data *sdata = 4505 from_timer(sdata, t, u.mgd.conn_mon_timer); 4506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4507 struct ieee80211_local *local = sdata->local; 4508 4509 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4510 return; 4511 4512 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4513 } 4514 4515 static void ieee80211_sta_monitor_work(struct work_struct *work) 4516 { 4517 struct ieee80211_sub_if_data *sdata = 4518 container_of(work, struct ieee80211_sub_if_data, 4519 u.mgd.monitor_work); 4520 4521 ieee80211_mgd_probe_ap(sdata, false); 4522 } 4523 4524 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4525 { 4526 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4527 __ieee80211_stop_poll(sdata); 4528 4529 /* let's probe the connection once */ 4530 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4531 ieee80211_queue_work(&sdata->local->hw, 4532 &sdata->u.mgd.monitor_work); 4533 } 4534 } 4535 4536 #ifdef CONFIG_PM 4537 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4538 { 4539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4540 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4541 4542 sdata_lock(sdata); 4543 4544 if (ifmgd->auth_data || ifmgd->assoc_data) { 4545 const u8 *bssid = ifmgd->auth_data ? 4546 ifmgd->auth_data->bss->bssid : 4547 ifmgd->assoc_data->bss->bssid; 4548 4549 /* 4550 * If we are trying to authenticate / associate while suspending, 4551 * cfg80211 won't know and won't actually abort those attempts, 4552 * thus we need to do that ourselves. 4553 */ 4554 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4555 IEEE80211_STYPE_DEAUTH, 4556 WLAN_REASON_DEAUTH_LEAVING, 4557 false, frame_buf); 4558 if (ifmgd->assoc_data) 4559 ieee80211_destroy_assoc_data(sdata, false, true); 4560 if (ifmgd->auth_data) 4561 ieee80211_destroy_auth_data(sdata, false); 4562 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4563 IEEE80211_DEAUTH_FRAME_LEN); 4564 } 4565 4566 /* This is a bit of a hack - we should find a better and more generic 4567 * solution to this. Normally when suspending, cfg80211 will in fact 4568 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4569 * auth (not so important) or assoc (this is the problem) process. 4570 * 4571 * As a consequence, it can happen that we are in the process of both 4572 * associating and suspending, and receive an association response 4573 * after cfg80211 has checked if it needs to disconnect, but before 4574 * we actually set the flag to drop incoming frames. This will then 4575 * cause the workqueue flush to process the association response in 4576 * the suspend, resulting in a successful association just before it 4577 * tries to remove the interface from the driver, which now though 4578 * has a channel context assigned ... this results in issues. 4579 * 4580 * To work around this (for now) simply deauth here again if we're 4581 * now connected. 4582 */ 4583 if (ifmgd->associated && !sdata->local->wowlan) { 4584 u8 bssid[ETH_ALEN]; 4585 struct cfg80211_deauth_request req = { 4586 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4587 .bssid = bssid, 4588 }; 4589 4590 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4591 ieee80211_mgd_deauth(sdata, &req); 4592 } 4593 4594 sdata_unlock(sdata); 4595 } 4596 4597 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4598 { 4599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4600 4601 sdata_lock(sdata); 4602 if (!ifmgd->associated) { 4603 sdata_unlock(sdata); 4604 return; 4605 } 4606 4607 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4608 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4609 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4610 ieee80211_sta_connection_lost(sdata, 4611 ifmgd->associated->bssid, 4612 WLAN_REASON_UNSPECIFIED, 4613 true); 4614 sdata_unlock(sdata); 4615 return; 4616 } 4617 sdata_unlock(sdata); 4618 } 4619 #endif 4620 4621 /* interface setup */ 4622 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4623 { 4624 struct ieee80211_if_managed *ifmgd; 4625 4626 ifmgd = &sdata->u.mgd; 4627 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4628 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4629 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4630 ieee80211_beacon_connection_loss_work); 4631 INIT_WORK(&ifmgd->csa_connection_drop_work, 4632 ieee80211_csa_connection_drop_work); 4633 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4634 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4635 ieee80211_tdls_peer_del_work); 4636 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4637 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4638 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4639 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4640 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4641 ieee80211_sta_handle_tspec_ac_params_wk); 4642 4643 ifmgd->flags = 0; 4644 ifmgd->powersave = sdata->wdev.ps; 4645 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4646 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4647 ifmgd->p2p_noa_index = -1; 4648 4649 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4650 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4651 else 4652 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4653 4654 /* Setup TDLS data */ 4655 spin_lock_init(&ifmgd->teardown_lock); 4656 ifmgd->teardown_skb = NULL; 4657 ifmgd->orig_teardown_skb = NULL; 4658 } 4659 4660 /* scan finished notification */ 4661 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4662 { 4663 struct ieee80211_sub_if_data *sdata; 4664 4665 /* Restart STA timers */ 4666 rcu_read_lock(); 4667 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4668 if (ieee80211_sdata_running(sdata)) 4669 ieee80211_restart_sta_timer(sdata); 4670 } 4671 rcu_read_unlock(); 4672 } 4673 4674 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4675 struct cfg80211_bss *cbss) 4676 { 4677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4678 const u8 *ht_cap_ie, *vht_cap_ie; 4679 const struct ieee80211_ht_cap *ht_cap; 4680 const struct ieee80211_vht_cap *vht_cap; 4681 u8 chains = 1; 4682 4683 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4684 return chains; 4685 4686 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4687 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4688 ht_cap = (void *)(ht_cap_ie + 2); 4689 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4690 /* 4691 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4692 * "Tx Unequal Modulation Supported" fields. 4693 */ 4694 } 4695 4696 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4697 return chains; 4698 4699 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4700 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4701 u8 nss; 4702 u16 tx_mcs_map; 4703 4704 vht_cap = (void *)(vht_cap_ie + 2); 4705 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4706 for (nss = 8; nss > 0; nss--) { 4707 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4708 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4709 break; 4710 } 4711 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4712 chains = max(chains, nss); 4713 } 4714 4715 return chains; 4716 } 4717 4718 static bool 4719 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4720 const struct ieee80211_he_operation *he_op) 4721 { 4722 const struct ieee80211_sta_he_cap *sta_he_cap = 4723 ieee80211_get_he_sta_cap(sband); 4724 u16 ap_min_req_set; 4725 int i; 4726 4727 if (!sta_he_cap || !he_op) 4728 return false; 4729 4730 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4731 4732 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4733 for (i = 0; i < 3; i++) { 4734 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4735 &sta_he_cap->he_mcs_nss_supp; 4736 u16 sta_mcs_map_rx = 4737 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4738 u16 sta_mcs_map_tx = 4739 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4740 u8 nss; 4741 bool verified = true; 4742 4743 /* 4744 * For each band there is a maximum of 8 spatial streams 4745 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4746 * of 2 bits per NSS (1-8), with the values defined in enum 4747 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4748 * capabilities aren't less than the AP's minimum requirements 4749 * for this HE BSS per SS. 4750 * It is enough to find one such band that meets the reqs. 4751 */ 4752 for (nss = 8; nss > 0; nss--) { 4753 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4754 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4755 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4756 4757 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4758 continue; 4759 4760 /* 4761 * Make sure the HE AP doesn't require MCSs that aren't 4762 * supported by the client 4763 */ 4764 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4765 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4766 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4767 verified = false; 4768 break; 4769 } 4770 } 4771 4772 if (verified) 4773 return true; 4774 } 4775 4776 /* If here, STA doesn't meet AP's HE min requirements */ 4777 return false; 4778 } 4779 4780 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4781 struct cfg80211_bss *cbss) 4782 { 4783 struct ieee80211_local *local = sdata->local; 4784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4785 const struct ieee80211_ht_cap *ht_cap = NULL; 4786 const struct ieee80211_ht_operation *ht_oper = NULL; 4787 const struct ieee80211_vht_operation *vht_oper = NULL; 4788 const struct ieee80211_he_operation *he_oper = NULL; 4789 struct ieee80211_supported_band *sband; 4790 struct cfg80211_chan_def chandef; 4791 int ret; 4792 u32 i; 4793 bool have_80mhz; 4794 4795 sband = local->hw.wiphy->bands[cbss->channel->band]; 4796 4797 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4798 IEEE80211_STA_DISABLE_80P80MHZ | 4799 IEEE80211_STA_DISABLE_160MHZ); 4800 4801 /* disable HT/VHT/HE if we don't support them */ 4802 if (!sband->ht_cap.ht_supported) { 4803 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4805 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4806 } 4807 4808 if (!sband->vht_cap.vht_supported) 4809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4810 4811 if (!ieee80211_get_he_sta_cap(sband)) 4812 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4813 4814 rcu_read_lock(); 4815 4816 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4817 const u8 *ht_oper_ie, *ht_cap_ie; 4818 4819 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4820 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4821 ht_oper = (void *)(ht_oper_ie + 2); 4822 4823 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4824 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4825 ht_cap = (void *)(ht_cap_ie + 2); 4826 4827 if (!ht_cap) { 4828 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4829 ht_oper = NULL; 4830 } 4831 } 4832 4833 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 4834 const u8 *vht_oper_ie, *vht_cap; 4835 4836 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4837 WLAN_EID_VHT_OPERATION); 4838 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4839 vht_oper = (void *)(vht_oper_ie + 2); 4840 if (vht_oper && !ht_oper) { 4841 vht_oper = NULL; 4842 sdata_info(sdata, 4843 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 4844 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4845 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4846 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4847 } 4848 4849 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4850 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4851 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4852 vht_oper = NULL; 4853 } 4854 } 4855 4856 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4857 const struct cfg80211_bss_ies *ies; 4858 const u8 *he_oper_ie; 4859 4860 ies = rcu_dereference(cbss->ies); 4861 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4862 ies->data, ies->len); 4863 if (he_oper_ie && 4864 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4865 he_oper = (void *)(he_oper_ie + 3); 4866 else 4867 he_oper = NULL; 4868 4869 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4870 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4871 } 4872 4873 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4874 have_80mhz = false; 4875 for (i = 0; i < sband->n_channels; i++) { 4876 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4877 IEEE80211_CHAN_NO_80MHZ)) 4878 continue; 4879 4880 have_80mhz = true; 4881 break; 4882 } 4883 4884 if (!have_80mhz) 4885 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4886 4887 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4888 cbss->channel, 4889 ht_oper, vht_oper, he_oper, 4890 &chandef, false); 4891 4892 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4893 local->rx_chains); 4894 4895 rcu_read_unlock(); 4896 4897 /* will change later if needed */ 4898 sdata->smps_mode = IEEE80211_SMPS_OFF; 4899 4900 mutex_lock(&local->mtx); 4901 /* 4902 * If this fails (possibly due to channel context sharing 4903 * on incompatible channels, e.g. 80+80 and 160 sharing the 4904 * same control channel) try to use a smaller bandwidth. 4905 */ 4906 ret = ieee80211_vif_use_channel(sdata, &chandef, 4907 IEEE80211_CHANCTX_SHARED); 4908 4909 /* don't downgrade for 5 and 10 MHz channels, though. */ 4910 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4911 chandef.width == NL80211_CHAN_WIDTH_10) 4912 goto out; 4913 4914 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4915 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4916 ret = ieee80211_vif_use_channel(sdata, &chandef, 4917 IEEE80211_CHANCTX_SHARED); 4918 } 4919 out: 4920 mutex_unlock(&local->mtx); 4921 return ret; 4922 } 4923 4924 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4925 u8 *dtim_count, u8 *dtim_period) 4926 { 4927 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4928 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4929 ies->len); 4930 const struct ieee80211_tim_ie *tim = NULL; 4931 const struct ieee80211_bssid_index *idx; 4932 bool valid = tim_ie && tim_ie[1] >= 2; 4933 4934 if (valid) 4935 tim = (void *)(tim_ie + 2); 4936 4937 if (dtim_count) 4938 *dtim_count = valid ? tim->dtim_count : 0; 4939 4940 if (dtim_period) 4941 *dtim_period = valid ? tim->dtim_period : 0; 4942 4943 /* Check if value is overridden by non-transmitted profile */ 4944 if (!idx_ie || idx_ie[1] < 3) 4945 return valid; 4946 4947 idx = (void *)(idx_ie + 2); 4948 4949 if (dtim_count) 4950 *dtim_count = idx->dtim_count; 4951 4952 if (dtim_period) 4953 *dtim_period = idx->dtim_period; 4954 4955 return true; 4956 } 4957 4958 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4959 struct cfg80211_bss *cbss, bool assoc, 4960 bool override) 4961 { 4962 struct ieee80211_local *local = sdata->local; 4963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4964 struct ieee80211_bss *bss = (void *)cbss->priv; 4965 struct sta_info *new_sta = NULL; 4966 struct ieee80211_supported_band *sband; 4967 bool have_sta = false; 4968 int err; 4969 4970 sband = local->hw.wiphy->bands[cbss->channel->band]; 4971 4972 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4973 return -EINVAL; 4974 4975 /* If a reconfig is happening, bail out */ 4976 if (local->in_reconfig) 4977 return -EBUSY; 4978 4979 if (assoc) { 4980 rcu_read_lock(); 4981 have_sta = sta_info_get(sdata, cbss->bssid); 4982 rcu_read_unlock(); 4983 } 4984 4985 if (!have_sta) { 4986 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4987 if (!new_sta) 4988 return -ENOMEM; 4989 } 4990 4991 /* 4992 * Set up the information for the new channel before setting the 4993 * new channel. We can't - completely race-free - change the basic 4994 * rates bitmap and the channel (sband) that it refers to, but if 4995 * we set it up before we at least avoid calling into the driver's 4996 * bss_info_changed() method with invalid information (since we do 4997 * call that from changing the channel - only for IDLE and perhaps 4998 * some others, but ...). 4999 * 5000 * So to avoid that, just set up all the new information before the 5001 * channel, but tell the driver to apply it only afterwards, since 5002 * it might need the new channel for that. 5003 */ 5004 if (new_sta) { 5005 u32 rates = 0, basic_rates = 0; 5006 bool have_higher_than_11mbit; 5007 int min_rate = INT_MAX, min_rate_index = -1; 5008 const struct cfg80211_bss_ies *ies; 5009 int shift = ieee80211_vif_get_shift(&sdata->vif); 5010 5011 ieee80211_get_rates(sband, bss->supp_rates, 5012 bss->supp_rates_len, 5013 &rates, &basic_rates, 5014 &have_higher_than_11mbit, 5015 &min_rate, &min_rate_index, 5016 shift); 5017 5018 /* 5019 * This used to be a workaround for basic rates missing 5020 * in the association response frame. Now that we no 5021 * longer use the basic rates from there, it probably 5022 * doesn't happen any more, but keep the workaround so 5023 * in case some *other* APs are buggy in different ways 5024 * we can connect -- with a warning. 5025 */ 5026 if (!basic_rates && min_rate_index >= 0) { 5027 sdata_info(sdata, 5028 "No basic rates, using min rate instead\n"); 5029 basic_rates = BIT(min_rate_index); 5030 } 5031 5032 if (rates) 5033 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5034 else 5035 sdata_info(sdata, 5036 "No rates found, keeping mandatory only\n"); 5037 5038 sdata->vif.bss_conf.basic_rates = basic_rates; 5039 5040 /* cf. IEEE 802.11 9.2.12 */ 5041 if (cbss->channel->band == NL80211_BAND_2GHZ && 5042 have_higher_than_11mbit) 5043 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5044 else 5045 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5046 5047 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5048 5049 /* set timing information */ 5050 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5051 rcu_read_lock(); 5052 ies = rcu_dereference(cbss->beacon_ies); 5053 if (ies) { 5054 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5055 sdata->vif.bss_conf.sync_device_ts = 5056 bss->device_ts_beacon; 5057 5058 ieee80211_get_dtim(ies, 5059 &sdata->vif.bss_conf.sync_dtim_count, 5060 NULL); 5061 } else if (!ieee80211_hw_check(&sdata->local->hw, 5062 TIMING_BEACON_ONLY)) { 5063 ies = rcu_dereference(cbss->proberesp_ies); 5064 /* must be non-NULL since beacon IEs were NULL */ 5065 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5066 sdata->vif.bss_conf.sync_device_ts = 5067 bss->device_ts_presp; 5068 sdata->vif.bss_conf.sync_dtim_count = 0; 5069 } else { 5070 sdata->vif.bss_conf.sync_tsf = 0; 5071 sdata->vif.bss_conf.sync_device_ts = 0; 5072 sdata->vif.bss_conf.sync_dtim_count = 0; 5073 } 5074 rcu_read_unlock(); 5075 } 5076 5077 if (new_sta || override) { 5078 err = ieee80211_prep_channel(sdata, cbss); 5079 if (err) { 5080 if (new_sta) 5081 sta_info_free(local, new_sta); 5082 return -EINVAL; 5083 } 5084 } 5085 5086 if (new_sta) { 5087 /* 5088 * tell driver about BSSID, basic rates and timing 5089 * this was set up above, before setting the channel 5090 */ 5091 ieee80211_bss_info_change_notify(sdata, 5092 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5093 BSS_CHANGED_BEACON_INT); 5094 5095 if (assoc) 5096 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5097 5098 err = sta_info_insert(new_sta); 5099 new_sta = NULL; 5100 if (err) { 5101 sdata_info(sdata, 5102 "failed to insert STA entry for the AP (error %d)\n", 5103 err); 5104 return err; 5105 } 5106 } else 5107 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5108 5109 /* Cancel scan to ensure that nothing interferes with connection */ 5110 if (local->scanning) 5111 ieee80211_scan_cancel(local); 5112 5113 return 0; 5114 } 5115 5116 /* config hooks */ 5117 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5118 struct cfg80211_auth_request *req) 5119 { 5120 struct ieee80211_local *local = sdata->local; 5121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5122 struct ieee80211_mgd_auth_data *auth_data; 5123 u16 auth_alg; 5124 int err; 5125 bool cont_auth; 5126 5127 /* prepare auth data structure */ 5128 5129 switch (req->auth_type) { 5130 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5131 auth_alg = WLAN_AUTH_OPEN; 5132 break; 5133 case NL80211_AUTHTYPE_SHARED_KEY: 5134 if (fips_enabled) 5135 return -EOPNOTSUPP; 5136 auth_alg = WLAN_AUTH_SHARED_KEY; 5137 break; 5138 case NL80211_AUTHTYPE_FT: 5139 auth_alg = WLAN_AUTH_FT; 5140 break; 5141 case NL80211_AUTHTYPE_NETWORK_EAP: 5142 auth_alg = WLAN_AUTH_LEAP; 5143 break; 5144 case NL80211_AUTHTYPE_SAE: 5145 auth_alg = WLAN_AUTH_SAE; 5146 break; 5147 case NL80211_AUTHTYPE_FILS_SK: 5148 auth_alg = WLAN_AUTH_FILS_SK; 5149 break; 5150 case NL80211_AUTHTYPE_FILS_SK_PFS: 5151 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5152 break; 5153 case NL80211_AUTHTYPE_FILS_PK: 5154 auth_alg = WLAN_AUTH_FILS_PK; 5155 break; 5156 default: 5157 return -EOPNOTSUPP; 5158 } 5159 5160 if (ifmgd->assoc_data) 5161 return -EBUSY; 5162 5163 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5164 req->ie_len, GFP_KERNEL); 5165 if (!auth_data) 5166 return -ENOMEM; 5167 5168 auth_data->bss = req->bss; 5169 5170 if (req->auth_data_len >= 4) { 5171 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5172 __le16 *pos = (__le16 *) req->auth_data; 5173 5174 auth_data->sae_trans = le16_to_cpu(pos[0]); 5175 auth_data->sae_status = le16_to_cpu(pos[1]); 5176 } 5177 memcpy(auth_data->data, req->auth_data + 4, 5178 req->auth_data_len - 4); 5179 auth_data->data_len += req->auth_data_len - 4; 5180 } 5181 5182 /* Check if continuing authentication or trying to authenticate with the 5183 * same BSS that we were in the process of authenticating with and avoid 5184 * removal and re-addition of the STA entry in 5185 * ieee80211_prep_connection(). 5186 */ 5187 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5188 5189 if (req->ie && req->ie_len) { 5190 memcpy(&auth_data->data[auth_data->data_len], 5191 req->ie, req->ie_len); 5192 auth_data->data_len += req->ie_len; 5193 } 5194 5195 if (req->key && req->key_len) { 5196 auth_data->key_len = req->key_len; 5197 auth_data->key_idx = req->key_idx; 5198 memcpy(auth_data->key, req->key, req->key_len); 5199 } 5200 5201 auth_data->algorithm = auth_alg; 5202 5203 /* try to authenticate/probe */ 5204 5205 if (ifmgd->auth_data) { 5206 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5207 auth_data->peer_confirmed = 5208 ifmgd->auth_data->peer_confirmed; 5209 } 5210 ieee80211_destroy_auth_data(sdata, cont_auth); 5211 } 5212 5213 /* prep auth_data so we don't go into idle on disassoc */ 5214 ifmgd->auth_data = auth_data; 5215 5216 /* If this is continuation of an ongoing SAE authentication exchange 5217 * (i.e., request to send SAE Confirm) and the peer has already 5218 * confirmed, mark authentication completed since we are about to send 5219 * out SAE Confirm. 5220 */ 5221 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5222 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5223 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5224 5225 if (ifmgd->associated) { 5226 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5227 5228 sdata_info(sdata, 5229 "disconnect from AP %pM for new auth to %pM\n", 5230 ifmgd->associated->bssid, req->bss->bssid); 5231 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5232 WLAN_REASON_UNSPECIFIED, 5233 false, frame_buf); 5234 5235 ieee80211_report_disconnect(sdata, frame_buf, 5236 sizeof(frame_buf), true, 5237 WLAN_REASON_UNSPECIFIED); 5238 } 5239 5240 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5241 5242 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5243 if (err) 5244 goto err_clear; 5245 5246 err = ieee80211_auth(sdata); 5247 if (err) { 5248 sta_info_destroy_addr(sdata, req->bss->bssid); 5249 goto err_clear; 5250 } 5251 5252 /* hold our own reference */ 5253 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5254 return 0; 5255 5256 err_clear: 5257 eth_zero_addr(ifmgd->bssid); 5258 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5259 ifmgd->auth_data = NULL; 5260 mutex_lock(&sdata->local->mtx); 5261 ieee80211_vif_release_channel(sdata); 5262 mutex_unlock(&sdata->local->mtx); 5263 kfree(auth_data); 5264 return err; 5265 } 5266 5267 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5268 struct cfg80211_assoc_request *req) 5269 { 5270 struct ieee80211_local *local = sdata->local; 5271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5272 struct ieee80211_bss *bss = (void *)req->bss->priv; 5273 struct ieee80211_mgd_assoc_data *assoc_data; 5274 const struct cfg80211_bss_ies *beacon_ies; 5275 struct ieee80211_supported_band *sband; 5276 const u8 *ssidie, *ht_ie, *vht_ie; 5277 int i, err; 5278 bool override = false; 5279 5280 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5281 if (!assoc_data) 5282 return -ENOMEM; 5283 5284 rcu_read_lock(); 5285 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5286 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5287 rcu_read_unlock(); 5288 kfree(assoc_data); 5289 return -EINVAL; 5290 } 5291 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5292 assoc_data->ssid_len = ssidie[1]; 5293 rcu_read_unlock(); 5294 5295 if (ifmgd->associated) { 5296 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5297 5298 sdata_info(sdata, 5299 "disconnect from AP %pM for new assoc to %pM\n", 5300 ifmgd->associated->bssid, req->bss->bssid); 5301 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5302 WLAN_REASON_UNSPECIFIED, 5303 false, frame_buf); 5304 5305 ieee80211_report_disconnect(sdata, frame_buf, 5306 sizeof(frame_buf), true, 5307 WLAN_REASON_UNSPECIFIED); 5308 } 5309 5310 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5311 err = -EBUSY; 5312 goto err_free; 5313 } 5314 5315 if (ifmgd->assoc_data) { 5316 err = -EBUSY; 5317 goto err_free; 5318 } 5319 5320 if (ifmgd->auth_data) { 5321 bool match; 5322 5323 /* keep sta info, bssid if matching */ 5324 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5325 ieee80211_destroy_auth_data(sdata, match); 5326 } 5327 5328 /* prepare assoc data */ 5329 5330 ifmgd->beacon_crc_valid = false; 5331 5332 assoc_data->wmm = bss->wmm_used && 5333 (local->hw.queues >= IEEE80211_NUM_ACS); 5334 5335 /* 5336 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5337 * We still associate in non-HT mode (11a/b/g) if any one of these 5338 * ciphers is configured as pairwise. 5339 * We can set this to true for non-11n hardware, that'll be checked 5340 * separately along with the peer capabilities. 5341 */ 5342 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5343 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5344 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5345 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5346 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5348 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5349 netdev_info(sdata->dev, 5350 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5351 } 5352 } 5353 5354 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5355 5356 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5357 if (!bss->wmm_used) { 5358 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5359 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5360 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5361 netdev_info(sdata->dev, 5362 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5363 } 5364 5365 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5366 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5367 sizeof(ifmgd->ht_capa_mask)); 5368 5369 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5370 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5371 sizeof(ifmgd->vht_capa_mask)); 5372 5373 if (req->ie && req->ie_len) { 5374 memcpy(assoc_data->ie, req->ie, req->ie_len); 5375 assoc_data->ie_len = req->ie_len; 5376 } 5377 5378 if (req->fils_kek) { 5379 /* should already be checked in cfg80211 - so warn */ 5380 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5381 err = -EINVAL; 5382 goto err_free; 5383 } 5384 memcpy(assoc_data->fils_kek, req->fils_kek, 5385 req->fils_kek_len); 5386 assoc_data->fils_kek_len = req->fils_kek_len; 5387 } 5388 5389 if (req->fils_nonces) 5390 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5391 2 * FILS_NONCE_LEN); 5392 5393 assoc_data->bss = req->bss; 5394 5395 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5396 if (ifmgd->powersave) 5397 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5398 else 5399 sdata->smps_mode = IEEE80211_SMPS_OFF; 5400 } else 5401 sdata->smps_mode = ifmgd->req_smps; 5402 5403 assoc_data->capability = req->bss->capability; 5404 assoc_data->supp_rates = bss->supp_rates; 5405 assoc_data->supp_rates_len = bss->supp_rates_len; 5406 5407 rcu_read_lock(); 5408 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5409 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5410 assoc_data->ap_ht_param = 5411 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5412 else 5413 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5414 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5415 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5416 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5417 sizeof(struct ieee80211_vht_cap)); 5418 else 5419 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5420 rcu_read_unlock(); 5421 5422 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5423 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5424 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5425 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5426 5427 if (bss->wmm_used && bss->uapsd_supported && 5428 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5429 assoc_data->uapsd = true; 5430 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5431 } else { 5432 assoc_data->uapsd = false; 5433 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5434 } 5435 5436 if (req->prev_bssid) 5437 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5438 5439 if (req->use_mfp) { 5440 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5441 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5442 } else { 5443 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5444 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5445 } 5446 5447 if (req->flags & ASSOC_REQ_USE_RRM) 5448 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5449 else 5450 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5451 5452 if (req->crypto.control_port) 5453 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5454 else 5455 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5456 5457 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5458 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5459 sdata->control_port_over_nl80211 = 5460 req->crypto.control_port_over_nl80211; 5461 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5462 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5463 sdata->vif.type); 5464 5465 /* kick off associate process */ 5466 5467 ifmgd->assoc_data = assoc_data; 5468 ifmgd->dtim_period = 0; 5469 ifmgd->have_beacon = false; 5470 5471 /* override HT/VHT configuration only if the AP and we support it */ 5472 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5473 struct ieee80211_sta_ht_cap sta_ht_cap; 5474 5475 if (req->flags & ASSOC_REQ_DISABLE_HT) 5476 override = true; 5477 5478 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5479 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5480 5481 /* check for 40 MHz disable override */ 5482 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5483 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5484 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5485 override = true; 5486 5487 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5488 req->flags & ASSOC_REQ_DISABLE_VHT) 5489 override = true; 5490 } 5491 5492 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5493 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5494 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5495 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5496 } 5497 5498 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5499 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5500 5501 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5502 if (err) 5503 goto err_clear; 5504 5505 rcu_read_lock(); 5506 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5507 5508 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5509 !beacon_ies) { 5510 /* 5511 * Wait up to one beacon interval ... 5512 * should this be more if we miss one? 5513 */ 5514 sdata_info(sdata, "waiting for beacon from %pM\n", 5515 ifmgd->bssid); 5516 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5517 assoc_data->timeout_started = true; 5518 assoc_data->need_beacon = true; 5519 } else if (beacon_ies) { 5520 const u8 *ie; 5521 u8 dtim_count = 0; 5522 5523 ieee80211_get_dtim(beacon_ies, &dtim_count, 5524 &ifmgd->dtim_period); 5525 5526 ifmgd->have_beacon = true; 5527 assoc_data->timeout = jiffies; 5528 assoc_data->timeout_started = true; 5529 5530 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5531 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5532 sdata->vif.bss_conf.sync_device_ts = 5533 bss->device_ts_beacon; 5534 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5535 } 5536 5537 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5538 beacon_ies->data, beacon_ies->len); 5539 if (ie && ie[1] >= 3) 5540 sdata->vif.bss_conf.profile_periodicity = ie[4]; 5541 5542 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, 5543 beacon_ies->data, beacon_ies->len); 5544 if (ie && ie[1] >= 11 && 5545 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5546 sdata->vif.bss_conf.ema_ap = true; 5547 } else { 5548 assoc_data->timeout = jiffies; 5549 assoc_data->timeout_started = true; 5550 } 5551 rcu_read_unlock(); 5552 5553 run_again(sdata, assoc_data->timeout); 5554 5555 if (bss->corrupt_data) { 5556 char *corrupt_type = "data"; 5557 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5558 if (bss->corrupt_data & 5559 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5560 corrupt_type = "beacon and probe response"; 5561 else 5562 corrupt_type = "beacon"; 5563 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5564 corrupt_type = "probe response"; 5565 sdata_info(sdata, "associating with AP with corrupt %s\n", 5566 corrupt_type); 5567 } 5568 5569 return 0; 5570 err_clear: 5571 eth_zero_addr(ifmgd->bssid); 5572 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5573 ifmgd->assoc_data = NULL; 5574 err_free: 5575 kfree(assoc_data); 5576 return err; 5577 } 5578 5579 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5580 struct cfg80211_deauth_request *req) 5581 { 5582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5583 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5584 bool tx = !req->local_state_change; 5585 5586 if (ifmgd->auth_data && 5587 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5588 sdata_info(sdata, 5589 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5590 req->bssid, req->reason_code, 5591 ieee80211_get_reason_code_string(req->reason_code)); 5592 5593 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5594 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5595 IEEE80211_STYPE_DEAUTH, 5596 req->reason_code, tx, 5597 frame_buf); 5598 ieee80211_destroy_auth_data(sdata, false); 5599 ieee80211_report_disconnect(sdata, frame_buf, 5600 sizeof(frame_buf), true, 5601 req->reason_code); 5602 5603 return 0; 5604 } 5605 5606 if (ifmgd->assoc_data && 5607 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5608 sdata_info(sdata, 5609 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5610 req->bssid, req->reason_code, 5611 ieee80211_get_reason_code_string(req->reason_code)); 5612 5613 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5614 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5615 IEEE80211_STYPE_DEAUTH, 5616 req->reason_code, tx, 5617 frame_buf); 5618 ieee80211_destroy_assoc_data(sdata, false, true); 5619 ieee80211_report_disconnect(sdata, frame_buf, 5620 sizeof(frame_buf), true, 5621 req->reason_code); 5622 return 0; 5623 } 5624 5625 if (ifmgd->associated && 5626 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5627 sdata_info(sdata, 5628 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5629 req->bssid, req->reason_code, 5630 ieee80211_get_reason_code_string(req->reason_code)); 5631 5632 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5633 req->reason_code, tx, frame_buf); 5634 ieee80211_report_disconnect(sdata, frame_buf, 5635 sizeof(frame_buf), true, 5636 req->reason_code); 5637 return 0; 5638 } 5639 5640 return -ENOTCONN; 5641 } 5642 5643 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5644 struct cfg80211_disassoc_request *req) 5645 { 5646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5647 u8 bssid[ETH_ALEN]; 5648 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5649 5650 /* 5651 * cfg80211 should catch this ... but it's racy since 5652 * we can receive a disassoc frame, process it, hand it 5653 * to cfg80211 while that's in a locked section already 5654 * trying to tell us that the user wants to disconnect. 5655 */ 5656 if (ifmgd->associated != req->bss) 5657 return -ENOLINK; 5658 5659 sdata_info(sdata, 5660 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5661 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5662 5663 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5664 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5665 req->reason_code, !req->local_state_change, 5666 frame_buf); 5667 5668 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5669 req->reason_code); 5670 5671 return 0; 5672 } 5673 5674 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5675 { 5676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5677 5678 /* 5679 * Make sure some work items will not run after this, 5680 * they will not do anything but might not have been 5681 * cancelled when disconnecting. 5682 */ 5683 cancel_work_sync(&ifmgd->monitor_work); 5684 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5685 cancel_work_sync(&ifmgd->request_smps_work); 5686 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5687 cancel_work_sync(&ifmgd->chswitch_work); 5688 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5689 5690 sdata_lock(sdata); 5691 if (ifmgd->assoc_data) { 5692 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5693 ieee80211_destroy_assoc_data(sdata, false, false); 5694 cfg80211_assoc_timeout(sdata->dev, bss); 5695 } 5696 if (ifmgd->auth_data) 5697 ieee80211_destroy_auth_data(sdata, false); 5698 spin_lock_bh(&ifmgd->teardown_lock); 5699 if (ifmgd->teardown_skb) { 5700 kfree_skb(ifmgd->teardown_skb); 5701 ifmgd->teardown_skb = NULL; 5702 ifmgd->orig_teardown_skb = NULL; 5703 } 5704 kfree(ifmgd->assoc_req_ies); 5705 ifmgd->assoc_req_ies = NULL; 5706 ifmgd->assoc_req_ies_len = 0; 5707 spin_unlock_bh(&ifmgd->teardown_lock); 5708 del_timer_sync(&ifmgd->timer); 5709 sdata_unlock(sdata); 5710 } 5711 5712 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5713 enum nl80211_cqm_rssi_threshold_event rssi_event, 5714 s32 rssi_level, 5715 gfp_t gfp) 5716 { 5717 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5718 5719 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5720 5721 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5722 } 5723 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5724 5725 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5726 { 5727 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5728 5729 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5730 5731 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5732 } 5733 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5734