1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 10 * Copyright (C) 2018 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/delay.h> 18 #include <linux/if_ether.h> 19 #include <linux/skbuff.h> 20 #include <linux/if_arp.h> 21 #include <linux/etherdevice.h> 22 #include <linux/moduleparam.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/crc32.h> 25 #include <linux/slab.h> 26 #include <linux/export.h> 27 #include <net/mac80211.h> 28 #include <asm/unaligned.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "led.h" 34 #include "fils_aead.h" 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 43 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 44 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 45 #define IEEE80211_ASSOC_MAX_TRIES 3 46 47 static int max_nullfunc_tries = 2; 48 module_param(max_nullfunc_tries, int, 0644); 49 MODULE_PARM_DESC(max_nullfunc_tries, 50 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 51 52 static int max_probe_tries = 5; 53 module_param(max_probe_tries, int, 0644); 54 MODULE_PARM_DESC(max_probe_tries, 55 "Maximum probe tries before disconnecting (reason 4)."); 56 57 /* 58 * Beacon loss timeout is calculated as N frames times the 59 * advertised beacon interval. This may need to be somewhat 60 * higher than what hardware might detect to account for 61 * delays in the host processing frames. But since we also 62 * probe on beacon miss before declaring the connection lost 63 * default to what we want. 64 */ 65 static int beacon_loss_count = 7; 66 module_param(beacon_loss_count, int, 0644); 67 MODULE_PARM_DESC(beacon_loss_count, 68 "Number of beacon intervals before we decide beacon was lost."); 69 70 /* 71 * Time the connection can be idle before we probe 72 * it to see if we can still talk to the AP. 73 */ 74 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 75 /* 76 * Time we wait for a probe response after sending 77 * a probe request because of beacon loss or for 78 * checking the connection still works. 79 */ 80 static int probe_wait_ms = 500; 81 module_param(probe_wait_ms, int, 0644); 82 MODULE_PARM_DESC(probe_wait_ms, 83 "Maximum time(ms) to wait for probe response" 84 " before disconnecting (reason 4)."); 85 86 /* 87 * How many Beacon frames need to have been used in average signal strength 88 * before starting to indicate signal change events. 89 */ 90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 91 92 /* 93 * We can have multiple work items (and connection probing) 94 * scheduling this timer, but we need to take care to only 95 * reschedule it when it should fire _earlier_ than it was 96 * asked for before, or if it's not pending right now. This 97 * function ensures that. Note that it then is required to 98 * run this function for all timeouts after the first one 99 * has happened -- the work that runs from this timer will 100 * do that. 101 */ 102 static void run_again(struct ieee80211_sub_if_data *sdata, 103 unsigned long timeout) 104 { 105 sdata_assert_lock(sdata); 106 107 if (!timer_pending(&sdata->u.mgd.timer) || 108 time_before(timeout, sdata->u.mgd.timer.expires)) 109 mod_timer(&sdata->u.mgd.timer, timeout); 110 } 111 112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 113 { 114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 115 return; 116 117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 118 return; 119 120 mod_timer(&sdata->u.mgd.bcn_mon_timer, 121 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 122 } 123 124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 125 { 126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 127 128 if (unlikely(!ifmgd->associated)) 129 return; 130 131 if (ifmgd->probe_send_count) 132 ifmgd->probe_send_count = 0; 133 134 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 135 return; 136 137 mod_timer(&ifmgd->conn_mon_timer, 138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 139 } 140 141 static int ecw2cw(int ecw) 142 { 143 return (1 << ecw) - 1; 144 } 145 146 static u32 147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 148 struct ieee80211_supported_band *sband, 149 struct ieee80211_channel *channel, 150 const struct ieee80211_ht_operation *ht_oper, 151 const struct ieee80211_vht_operation *vht_oper, 152 const struct ieee80211_he_operation *he_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 161 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 162 163 chandef->chan = channel; 164 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 165 chandef->center_freq1 = channel->center_freq; 166 chandef->center_freq2 = 0; 167 168 if (!ht_oper || !sta_ht_cap.ht_supported) { 169 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 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 | IEEE80211_STA_DISABLE_VHT; 191 goto out; 192 } 193 194 /* check 40 MHz support, if we have it */ 195 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 196 ieee80211_chandef_ht_oper(ht_oper, chandef); 197 } else { 198 /* 40 MHz (and 80 MHz) must be supported for VHT */ 199 ret = IEEE80211_STA_DISABLE_VHT; 200 /* also mark 40 MHz disabled */ 201 ret |= IEEE80211_STA_DISABLE_40MHZ; 202 goto out; 203 } 204 205 if (!vht_oper || !sband->vht_cap.vht_supported) { 206 ret = IEEE80211_STA_DISABLE_VHT; 207 goto out; 208 } 209 210 vht_chandef = *chandef; 211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 212 (le32_to_cpu(he_oper->he_oper_params) & 213 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 214 struct ieee80211_vht_operation he_oper_vht_cap; 215 216 /* 217 * Set only first 3 bytes (other 2 aren't used in 218 * ieee80211_chandef_vht_oper() anyway) 219 */ 220 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 221 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 222 223 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 224 &he_oper_vht_cap, ht_oper, 225 &vht_chandef)) { 226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 227 sdata_info(sdata, 228 "HE AP VHT information is invalid, disable HE\n"); 229 ret = IEEE80211_STA_DISABLE_HE; 230 goto out; 231 } 232 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 233 ht_oper, &vht_chandef)) { 234 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 235 sdata_info(sdata, 236 "AP VHT information is invalid, disable VHT\n"); 237 ret = IEEE80211_STA_DISABLE_VHT; 238 goto out; 239 } 240 241 if (!cfg80211_chandef_valid(&vht_chandef)) { 242 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 243 sdata_info(sdata, 244 "AP VHT information is invalid, disable VHT\n"); 245 ret = IEEE80211_STA_DISABLE_VHT; 246 goto out; 247 } 248 249 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 250 ret = 0; 251 goto out; 252 } 253 254 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 256 sdata_info(sdata, 257 "AP VHT information doesn't match HT, disable VHT\n"); 258 ret = IEEE80211_STA_DISABLE_VHT; 259 goto out; 260 } 261 262 *chandef = vht_chandef; 263 264 ret = 0; 265 266 out: 267 /* 268 * When tracking the current AP, don't do any further checks if the 269 * new chandef is identical to the one we're currently using for the 270 * connection. This keeps us from playing ping-pong with regulatory, 271 * without it the following can happen (for example): 272 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 273 * - AP advertises regdom US 274 * - CRDA loads regdom US with 80 MHz prohibited (old database) 275 * - the code below detects an unsupported channel, downgrades, and 276 * we disconnect from the AP in the caller 277 * - disconnect causes CRDA to reload world regdomain and the game 278 * starts anew. 279 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 280 * 281 * It seems possible that there are still scenarios with CSA or real 282 * bandwidth changes where a this could happen, but those cases are 283 * less common and wouldn't completely prevent using the AP. 284 */ 285 if (tracking && 286 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 287 return ret; 288 289 /* don't print the message below for VHT mismatch if VHT is disabled */ 290 if (ret & IEEE80211_STA_DISABLE_VHT) 291 vht_chandef = *chandef; 292 293 /* 294 * Ignore the DISABLED flag when we're already connected and only 295 * tracking the APs beacon for bandwidth changes - otherwise we 296 * might get disconnected here if we connect to an AP, update our 297 * regulatory information based on the AP's country IE and the 298 * information we have is wrong/outdated and disables the channel 299 * that we're actually using for the connection to the AP. 300 */ 301 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 302 tracking ? 0 : 303 IEEE80211_CHAN_DISABLED)) { 304 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 305 ret = IEEE80211_STA_DISABLE_HT | 306 IEEE80211_STA_DISABLE_VHT; 307 break; 308 } 309 310 ret |= ieee80211_chandef_downgrade(chandef); 311 } 312 313 if (chandef->width != vht_chandef.width && !tracking) 314 sdata_info(sdata, 315 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 316 317 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 318 return ret; 319 } 320 321 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 322 struct sta_info *sta, 323 const struct ieee80211_ht_cap *ht_cap, 324 const struct ieee80211_ht_operation *ht_oper, 325 const struct ieee80211_vht_operation *vht_oper, 326 const struct ieee80211_he_operation *he_oper, 327 const u8 *bssid, u32 *changed) 328 { 329 struct ieee80211_local *local = sdata->local; 330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 331 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 332 struct ieee80211_supported_band *sband = 333 local->hw.wiphy->bands[chan->band]; 334 struct cfg80211_chan_def chandef; 335 u16 ht_opmode; 336 u32 flags; 337 enum ieee80211_sta_rx_bandwidth new_sta_bw; 338 int ret; 339 340 /* if HT was/is disabled, don't track any bandwidth changes */ 341 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 342 return 0; 343 344 /* don't check VHT if we associated as non-VHT station */ 345 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 346 vht_oper = NULL; 347 348 /* don't check HE if we associated as non-HE station */ 349 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 350 !ieee80211_get_he_sta_cap(sband)) 351 he_oper = NULL; 352 353 if (WARN_ON_ONCE(!sta)) 354 return -EINVAL; 355 356 /* 357 * if bss configuration changed store the new one - 358 * this may be applicable even if channel is identical 359 */ 360 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 362 *changed |= BSS_CHANGED_HT; 363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 364 } 365 366 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 367 flags = ieee80211_determine_chantype(sdata, sband, chan, 368 ht_oper, vht_oper, he_oper, 369 &chandef, true); 370 371 /* 372 * Downgrade the new channel if we associated with restricted 373 * capabilities. For example, if we associated as a 20 MHz STA 374 * to a 40 MHz AP (due to regulatory, capabilities or config 375 * reasons) then switching to a 40 MHz channel now won't do us 376 * any good -- we couldn't use it with the AP. 377 */ 378 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 379 chandef.width == NL80211_CHAN_WIDTH_80P80) 380 flags |= ieee80211_chandef_downgrade(&chandef); 381 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 382 chandef.width == NL80211_CHAN_WIDTH_160) 383 flags |= ieee80211_chandef_downgrade(&chandef); 384 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 385 chandef.width > NL80211_CHAN_WIDTH_20) 386 flags |= ieee80211_chandef_downgrade(&chandef); 387 388 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 389 return 0; 390 391 sdata_info(sdata, 392 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 393 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 394 chandef.center_freq1, chandef.center_freq2); 395 396 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 397 IEEE80211_STA_DISABLE_VHT | 398 IEEE80211_STA_DISABLE_40MHZ | 399 IEEE80211_STA_DISABLE_80P80MHZ | 400 IEEE80211_STA_DISABLE_160MHZ)) || 401 !cfg80211_chandef_valid(&chandef)) { 402 sdata_info(sdata, 403 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 404 ifmgd->bssid); 405 return -EINVAL; 406 } 407 408 switch (chandef.width) { 409 case NL80211_CHAN_WIDTH_20_NOHT: 410 case NL80211_CHAN_WIDTH_20: 411 new_sta_bw = IEEE80211_STA_RX_BW_20; 412 break; 413 case NL80211_CHAN_WIDTH_40: 414 new_sta_bw = IEEE80211_STA_RX_BW_40; 415 break; 416 case NL80211_CHAN_WIDTH_80: 417 new_sta_bw = IEEE80211_STA_RX_BW_80; 418 break; 419 case NL80211_CHAN_WIDTH_80P80: 420 case NL80211_CHAN_WIDTH_160: 421 new_sta_bw = IEEE80211_STA_RX_BW_160; 422 break; 423 default: 424 return -EINVAL; 425 } 426 427 if (new_sta_bw > sta->cur_max_bandwidth) 428 new_sta_bw = sta->cur_max_bandwidth; 429 430 if (new_sta_bw < sta->sta.bandwidth) { 431 sta->sta.bandwidth = new_sta_bw; 432 rate_control_rate_update(local, sband, sta, 433 IEEE80211_RC_BW_CHANGED); 434 } 435 436 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 437 if (ret) { 438 sdata_info(sdata, 439 "AP %pM changed bandwidth to incompatible one - disconnect\n", 440 ifmgd->bssid); 441 return ret; 442 } 443 444 if (new_sta_bw > sta->sta.bandwidth) { 445 sta->sta.bandwidth = new_sta_bw; 446 rate_control_rate_update(local, sband, sta, 447 IEEE80211_RC_BW_CHANGED); 448 } 449 450 return 0; 451 } 452 453 /* frame sending functions */ 454 455 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 456 struct sk_buff *skb, u8 ap_ht_param, 457 struct ieee80211_supported_band *sband, 458 struct ieee80211_channel *channel, 459 enum ieee80211_smps_mode smps) 460 { 461 u8 *pos; 462 u32 flags = channel->flags; 463 u16 cap; 464 struct ieee80211_sta_ht_cap ht_cap; 465 466 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 467 468 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 469 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 470 471 /* determine capability flags */ 472 cap = ht_cap.cap; 473 474 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 475 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 476 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 477 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 478 cap &= ~IEEE80211_HT_CAP_SGI_40; 479 } 480 break; 481 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 482 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 483 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 484 cap &= ~IEEE80211_HT_CAP_SGI_40; 485 } 486 break; 487 } 488 489 /* 490 * If 40 MHz was disabled associate as though we weren't 491 * capable of 40 MHz -- some broken APs will never fall 492 * back to trying to transmit in 20 MHz. 493 */ 494 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 496 cap &= ~IEEE80211_HT_CAP_SGI_40; 497 } 498 499 /* set SM PS mode properly */ 500 cap &= ~IEEE80211_HT_CAP_SM_PS; 501 switch (smps) { 502 case IEEE80211_SMPS_AUTOMATIC: 503 case IEEE80211_SMPS_NUM_MODES: 504 WARN_ON(1); 505 /* fall through */ 506 case IEEE80211_SMPS_OFF: 507 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 508 IEEE80211_HT_CAP_SM_PS_SHIFT; 509 break; 510 case IEEE80211_SMPS_STATIC: 511 cap |= WLAN_HT_CAP_SM_PS_STATIC << 512 IEEE80211_HT_CAP_SM_PS_SHIFT; 513 break; 514 case IEEE80211_SMPS_DYNAMIC: 515 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 516 IEEE80211_HT_CAP_SM_PS_SHIFT; 517 break; 518 } 519 520 /* reserve and fill IE */ 521 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 522 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 523 } 524 525 /* This function determines vht capability flags for the association 526 * and builds the IE. 527 * Note - the function may set the owner of the MU-MIMO capability 528 */ 529 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 530 struct sk_buff *skb, 531 struct ieee80211_supported_band *sband, 532 struct ieee80211_vht_cap *ap_vht_cap) 533 { 534 struct ieee80211_local *local = sdata->local; 535 u8 *pos; 536 u32 cap; 537 struct ieee80211_sta_vht_cap vht_cap; 538 u32 mask, ap_bf_sts, our_bf_sts; 539 540 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 541 542 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 543 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 544 545 /* determine capability flags */ 546 cap = vht_cap.cap; 547 548 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 549 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 550 551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 552 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 553 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 554 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 555 } 556 557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 558 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 560 } 561 562 /* 563 * Some APs apparently get confused if our capabilities are better 564 * than theirs, so restrict what we advertise in the assoc request. 565 */ 566 if (!(ap_vht_cap->vht_cap_info & 567 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 568 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 569 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 570 else if (!(ap_vht_cap->vht_cap_info & 571 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 572 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 573 574 /* 575 * If some other vif is using the MU-MIMO capablity we cannot associate 576 * using MU-MIMO - this will lead to contradictions in the group-id 577 * mechanism. 578 * Ownership is defined since association request, in order to avoid 579 * simultaneous associations with MU-MIMO. 580 */ 581 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 582 bool disable_mu_mimo = false; 583 struct ieee80211_sub_if_data *other; 584 585 list_for_each_entry_rcu(other, &local->interfaces, list) { 586 if (other->vif.mu_mimo_owner) { 587 disable_mu_mimo = true; 588 break; 589 } 590 } 591 if (disable_mu_mimo) 592 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 593 else 594 sdata->vif.mu_mimo_owner = true; 595 } 596 597 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 598 599 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 600 our_bf_sts = cap & mask; 601 602 if (ap_bf_sts < our_bf_sts) { 603 cap &= ~mask; 604 cap |= ap_bf_sts; 605 } 606 607 /* reserve and fill IE */ 608 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 609 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 610 } 611 612 /* This function determines HE capability flags for the association 613 * and builds the IE. 614 */ 615 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 616 struct sk_buff *skb, 617 struct ieee80211_supported_band *sband) 618 { 619 u8 *pos; 620 const struct ieee80211_sta_he_cap *he_cap = NULL; 621 u8 he_cap_size; 622 623 he_cap = ieee80211_get_he_sta_cap(sband); 624 if (!he_cap) 625 return; 626 627 /* 628 * TODO: the 1 added is because this temporarily is under the EXTENSION 629 * IE. Get rid of it when it moves. 630 */ 631 he_cap_size = 632 2 + 1 + sizeof(he_cap->he_cap_elem) + 633 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 634 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 635 he_cap->he_cap_elem.phy_cap_info); 636 pos = skb_put(skb, he_cap_size); 637 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 638 } 639 640 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 641 { 642 struct ieee80211_local *local = sdata->local; 643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 644 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 645 struct sk_buff *skb; 646 struct ieee80211_mgmt *mgmt; 647 u8 *pos, qos_info; 648 size_t offset = 0, noffset; 649 int i, count, rates_len, supp_rates_len, shift; 650 u16 capab; 651 struct ieee80211_supported_band *sband; 652 struct ieee80211_chanctx_conf *chanctx_conf; 653 struct ieee80211_channel *chan; 654 u32 rates = 0; 655 656 sdata_assert_lock(sdata); 657 658 rcu_read_lock(); 659 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 660 if (WARN_ON(!chanctx_conf)) { 661 rcu_read_unlock(); 662 return; 663 } 664 chan = chanctx_conf->def.chan; 665 rcu_read_unlock(); 666 sband = local->hw.wiphy->bands[chan->band]; 667 shift = ieee80211_vif_get_shift(&sdata->vif); 668 669 if (assoc_data->supp_rates_len) { 670 /* 671 * Get all rates supported by the device and the AP as 672 * some APs don't like getting a superset of their rates 673 * in the association request (e.g. D-Link DAP 1353 in 674 * b-only mode)... 675 */ 676 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 677 assoc_data->supp_rates, 678 assoc_data->supp_rates_len, 679 &rates); 680 } else { 681 /* 682 * In case AP not provide any supported rates information 683 * before association, we send information element(s) with 684 * all rates that we support. 685 */ 686 rates_len = 0; 687 for (i = 0; i < sband->n_bitrates; i++) { 688 rates |= BIT(i); 689 rates_len++; 690 } 691 } 692 693 skb = alloc_skb(local->hw.extra_tx_headroom + 694 sizeof(*mgmt) + /* bit too much but doesn't matter */ 695 2 + assoc_data->ssid_len + /* SSID */ 696 4 + rates_len + /* (extended) rates */ 697 4 + /* power capability */ 698 2 + 2 * sband->n_channels + /* supported channels */ 699 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 700 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 701 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 702 sizeof(struct ieee80211_he_mcs_nss_supp) + 703 IEEE80211_HE_PPE_THRES_MAX_LEN + 704 assoc_data->ie_len + /* extra IEs */ 705 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 706 9, /* WMM */ 707 GFP_KERNEL); 708 if (!skb) 709 return; 710 711 skb_reserve(skb, local->hw.extra_tx_headroom); 712 713 capab = WLAN_CAPABILITY_ESS; 714 715 if (sband->band == NL80211_BAND_2GHZ) { 716 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 717 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 718 } 719 720 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 721 capab |= WLAN_CAPABILITY_PRIVACY; 722 723 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 724 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 725 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 726 727 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 728 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 729 730 mgmt = skb_put_zero(skb, 24); 731 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 732 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 733 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 734 735 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 736 skb_put(skb, 10); 737 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 738 IEEE80211_STYPE_REASSOC_REQ); 739 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 740 mgmt->u.reassoc_req.listen_interval = 741 cpu_to_le16(local->hw.conf.listen_interval); 742 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 743 ETH_ALEN); 744 } else { 745 skb_put(skb, 4); 746 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 747 IEEE80211_STYPE_ASSOC_REQ); 748 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 749 mgmt->u.assoc_req.listen_interval = 750 cpu_to_le16(local->hw.conf.listen_interval); 751 } 752 753 /* SSID */ 754 pos = skb_put(skb, 2 + assoc_data->ssid_len); 755 *pos++ = WLAN_EID_SSID; 756 *pos++ = assoc_data->ssid_len; 757 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 758 759 /* add all rates which were marked to be used above */ 760 supp_rates_len = rates_len; 761 if (supp_rates_len > 8) 762 supp_rates_len = 8; 763 764 pos = skb_put(skb, supp_rates_len + 2); 765 *pos++ = WLAN_EID_SUPP_RATES; 766 *pos++ = supp_rates_len; 767 768 count = 0; 769 for (i = 0; i < sband->n_bitrates; i++) { 770 if (BIT(i) & rates) { 771 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 772 5 * (1 << shift)); 773 *pos++ = (u8) rate; 774 if (++count == 8) 775 break; 776 } 777 } 778 779 if (rates_len > count) { 780 pos = skb_put(skb, rates_len - count + 2); 781 *pos++ = WLAN_EID_EXT_SUPP_RATES; 782 *pos++ = rates_len - count; 783 784 for (i++; i < sband->n_bitrates; i++) { 785 if (BIT(i) & rates) { 786 int rate; 787 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 788 5 * (1 << shift)); 789 *pos++ = (u8) rate; 790 } 791 } 792 } 793 794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 795 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 796 pos = skb_put(skb, 4); 797 *pos++ = WLAN_EID_PWR_CAPABILITY; 798 *pos++ = 2; 799 *pos++ = 0; /* min tx power */ 800 /* max tx power */ 801 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 802 } 803 804 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 805 /* TODO: get this in reg domain format */ 806 pos = skb_put(skb, 2 * sband->n_channels + 2); 807 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 808 *pos++ = 2 * sband->n_channels; 809 for (i = 0; i < sband->n_channels; i++) { 810 *pos++ = ieee80211_frequency_to_channel( 811 sband->channels[i].center_freq); 812 *pos++ = 1; /* one channel in the subband*/ 813 } 814 } 815 816 /* if present, add any custom IEs that go before HT */ 817 if (assoc_data->ie_len) { 818 static const u8 before_ht[] = { 819 WLAN_EID_SSID, 820 WLAN_EID_SUPP_RATES, 821 WLAN_EID_EXT_SUPP_RATES, 822 WLAN_EID_PWR_CAPABILITY, 823 WLAN_EID_SUPPORTED_CHANNELS, 824 WLAN_EID_RSN, 825 WLAN_EID_QOS_CAPA, 826 WLAN_EID_RRM_ENABLED_CAPABILITIES, 827 WLAN_EID_MOBILITY_DOMAIN, 828 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 829 WLAN_EID_RIC_DATA, /* reassoc only */ 830 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 831 }; 832 static const u8 after_ric[] = { 833 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 834 WLAN_EID_HT_CAPABILITY, 835 WLAN_EID_BSS_COEX_2040, 836 /* luckily this is almost always there */ 837 WLAN_EID_EXT_CAPABILITY, 838 WLAN_EID_QOS_TRAFFIC_CAPA, 839 WLAN_EID_TIM_BCAST_REQ, 840 WLAN_EID_INTERWORKING, 841 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 842 WLAN_EID_VHT_CAPABILITY, 843 WLAN_EID_OPMODE_NOTIF, 844 }; 845 846 noffset = ieee80211_ie_split_ric(assoc_data->ie, 847 assoc_data->ie_len, 848 before_ht, 849 ARRAY_SIZE(before_ht), 850 after_ric, 851 ARRAY_SIZE(after_ric), 852 offset); 853 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 854 offset = noffset; 855 } 856 857 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 858 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 859 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 860 861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 862 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 863 sband, chan, sdata->smps_mode); 864 865 /* if present, add any custom IEs that go before VHT */ 866 if (assoc_data->ie_len) { 867 static const u8 before_vht[] = { 868 /* 869 * no need to list the ones split off before HT 870 * or generated here 871 */ 872 WLAN_EID_BSS_COEX_2040, 873 WLAN_EID_EXT_CAPABILITY, 874 WLAN_EID_QOS_TRAFFIC_CAPA, 875 WLAN_EID_TIM_BCAST_REQ, 876 WLAN_EID_INTERWORKING, 877 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 878 }; 879 880 /* RIC already taken above, so no need to handle here anymore */ 881 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 882 before_vht, ARRAY_SIZE(before_vht), 883 offset); 884 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 885 offset = noffset; 886 } 887 888 /* if present, add any custom IEs that go before HE */ 889 if (assoc_data->ie_len) { 890 static const u8 before_he[] = { 891 /* 892 * no need to list the ones split off before VHT 893 * or generated here 894 */ 895 WLAN_EID_OPMODE_NOTIF, 896 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 897 /* 11ai elements */ 898 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 899 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 900 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 901 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 902 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 903 /* TODO: add 11ah/11aj/11ak elements */ 904 }; 905 906 /* RIC already taken above, so no need to handle here anymore */ 907 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 908 before_he, ARRAY_SIZE(before_he), 909 offset); 910 pos = skb_put(skb, noffset - offset); 911 memcpy(pos, assoc_data->ie + offset, noffset - offset); 912 offset = noffset; 913 } 914 915 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 916 ieee80211_add_vht_ie(sdata, skb, sband, 917 &assoc_data->ap_vht_cap); 918 919 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 920 ieee80211_add_he_ie(sdata, skb, sband); 921 922 /* if present, add any custom non-vendor IEs that go after HE */ 923 if (assoc_data->ie_len) { 924 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 925 assoc_data->ie_len, 926 offset); 927 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 928 offset = noffset; 929 } 930 931 if (assoc_data->wmm) { 932 if (assoc_data->uapsd) { 933 qos_info = ifmgd->uapsd_queues; 934 qos_info |= (ifmgd->uapsd_max_sp_len << 935 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 936 } else { 937 qos_info = 0; 938 } 939 940 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 941 } 942 943 /* add any remaining custom (i.e. vendor specific here) IEs */ 944 if (assoc_data->ie_len) { 945 noffset = assoc_data->ie_len; 946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 947 } 948 949 if (assoc_data->fils_kek_len && 950 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 951 dev_kfree_skb(skb); 952 return; 953 } 954 955 drv_mgd_prepare_tx(local, sdata, 0); 956 957 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 958 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 960 IEEE80211_TX_INTFL_MLME_CONN_TX; 961 ieee80211_tx_skb(sdata, skb); 962 } 963 964 void ieee80211_send_pspoll(struct ieee80211_local *local, 965 struct ieee80211_sub_if_data *sdata) 966 { 967 struct ieee80211_pspoll *pspoll; 968 struct sk_buff *skb; 969 970 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 971 if (!skb) 972 return; 973 974 pspoll = (struct ieee80211_pspoll *) skb->data; 975 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 976 977 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 978 ieee80211_tx_skb(sdata, skb); 979 } 980 981 void ieee80211_send_nullfunc(struct ieee80211_local *local, 982 struct ieee80211_sub_if_data *sdata, 983 bool powersave) 984 { 985 struct sk_buff *skb; 986 struct ieee80211_hdr_3addr *nullfunc; 987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 988 989 /* Don't send NDPs when STA is connected HE */ 990 if (sdata->vif.type == NL80211_IFTYPE_STATION && 991 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 992 return; 993 994 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 995 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 996 if (!skb) 997 return; 998 999 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1000 if (powersave) 1001 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1002 1003 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1004 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1005 1006 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1007 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1008 1009 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1010 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1011 1012 ieee80211_tx_skb(sdata, skb); 1013 } 1014 1015 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1016 struct ieee80211_sub_if_data *sdata) 1017 { 1018 struct sk_buff *skb; 1019 struct ieee80211_hdr *nullfunc; 1020 __le16 fc; 1021 1022 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1023 return; 1024 1025 /* Don't send NDPs when connected HE */ 1026 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1027 return; 1028 1029 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1030 if (!skb) 1031 return; 1032 1033 skb_reserve(skb, local->hw.extra_tx_headroom); 1034 1035 nullfunc = skb_put_zero(skb, 30); 1036 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1037 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1038 nullfunc->frame_control = fc; 1039 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1040 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1041 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1042 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1043 1044 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1045 ieee80211_tx_skb(sdata, skb); 1046 } 1047 1048 /* spectrum management related things */ 1049 static void ieee80211_chswitch_work(struct work_struct *work) 1050 { 1051 struct ieee80211_sub_if_data *sdata = 1052 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1053 struct ieee80211_local *local = sdata->local; 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1055 int ret; 1056 1057 if (!ieee80211_sdata_running(sdata)) 1058 return; 1059 1060 sdata_lock(sdata); 1061 mutex_lock(&local->mtx); 1062 mutex_lock(&local->chanctx_mtx); 1063 1064 if (!ifmgd->associated) 1065 goto out; 1066 1067 if (!sdata->vif.csa_active) 1068 goto out; 1069 1070 /* 1071 * using reservation isn't immediate as it may be deferred until later 1072 * with multi-vif. once reservation is complete it will re-schedule the 1073 * work with no reserved_chanctx so verify chandef to check if it 1074 * completed successfully 1075 */ 1076 1077 if (sdata->reserved_chanctx) { 1078 struct ieee80211_supported_band *sband = NULL; 1079 struct sta_info *mgd_sta = NULL; 1080 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1081 1082 /* 1083 * with multi-vif csa driver may call ieee80211_csa_finish() 1084 * many times while waiting for other interfaces to use their 1085 * reservations 1086 */ 1087 if (sdata->reserved_ready) 1088 goto out; 1089 1090 if (sdata->vif.bss_conf.chandef.width != 1091 sdata->csa_chandef.width) { 1092 /* 1093 * For managed interface, we need to also update the AP 1094 * station bandwidth and align the rate scale algorithm 1095 * on the bandwidth change. Here we only consider the 1096 * bandwidth of the new channel definition (as channel 1097 * switch flow does not have the full HT/VHT/HE 1098 * information), assuming that if additional changes are 1099 * required they would be done as part of the processing 1100 * of the next beacon from the AP. 1101 */ 1102 switch (sdata->csa_chandef.width) { 1103 case NL80211_CHAN_WIDTH_20_NOHT: 1104 case NL80211_CHAN_WIDTH_20: 1105 default: 1106 bw = IEEE80211_STA_RX_BW_20; 1107 break; 1108 case NL80211_CHAN_WIDTH_40: 1109 bw = IEEE80211_STA_RX_BW_40; 1110 break; 1111 case NL80211_CHAN_WIDTH_80: 1112 bw = IEEE80211_STA_RX_BW_80; 1113 break; 1114 case NL80211_CHAN_WIDTH_80P80: 1115 case NL80211_CHAN_WIDTH_160: 1116 bw = IEEE80211_STA_RX_BW_160; 1117 break; 1118 } 1119 1120 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1121 sband = 1122 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1123 } 1124 1125 if (sdata->vif.bss_conf.chandef.width > 1126 sdata->csa_chandef.width) { 1127 mgd_sta->sta.bandwidth = bw; 1128 rate_control_rate_update(local, sband, mgd_sta, 1129 IEEE80211_RC_BW_CHANGED); 1130 } 1131 1132 ret = ieee80211_vif_use_reserved_context(sdata); 1133 if (ret) { 1134 sdata_info(sdata, 1135 "failed to use reserved channel context, disconnecting (err=%d)\n", 1136 ret); 1137 ieee80211_queue_work(&sdata->local->hw, 1138 &ifmgd->csa_connection_drop_work); 1139 goto out; 1140 } 1141 1142 if (sdata->vif.bss_conf.chandef.width < 1143 sdata->csa_chandef.width) { 1144 mgd_sta->sta.bandwidth = bw; 1145 rate_control_rate_update(local, sband, mgd_sta, 1146 IEEE80211_RC_BW_CHANGED); 1147 } 1148 1149 goto out; 1150 } 1151 1152 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1153 &sdata->csa_chandef)) { 1154 sdata_info(sdata, 1155 "failed to finalize channel switch, disconnecting\n"); 1156 ieee80211_queue_work(&sdata->local->hw, 1157 &ifmgd->csa_connection_drop_work); 1158 goto out; 1159 } 1160 1161 /* XXX: shouldn't really modify cfg80211-owned data! */ 1162 ifmgd->associated->channel = sdata->csa_chandef.chan; 1163 1164 ifmgd->csa_waiting_bcn = true; 1165 1166 ieee80211_sta_reset_beacon_monitor(sdata); 1167 ieee80211_sta_reset_conn_monitor(sdata); 1168 1169 out: 1170 mutex_unlock(&local->chanctx_mtx); 1171 mutex_unlock(&local->mtx); 1172 sdata_unlock(sdata); 1173 } 1174 1175 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1176 { 1177 struct ieee80211_local *local = sdata->local; 1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1179 int ret; 1180 1181 sdata_assert_lock(sdata); 1182 1183 WARN_ON(!sdata->vif.csa_active); 1184 1185 if (sdata->csa_block_tx) { 1186 ieee80211_wake_vif_queues(local, sdata, 1187 IEEE80211_QUEUE_STOP_REASON_CSA); 1188 sdata->csa_block_tx = false; 1189 } 1190 1191 sdata->vif.csa_active = false; 1192 ifmgd->csa_waiting_bcn = false; 1193 1194 ret = drv_post_channel_switch(sdata); 1195 if (ret) { 1196 sdata_info(sdata, 1197 "driver post channel switch failed, disconnecting\n"); 1198 ieee80211_queue_work(&local->hw, 1199 &ifmgd->csa_connection_drop_work); 1200 return; 1201 } 1202 1203 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1204 } 1205 1206 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1207 { 1208 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1210 1211 trace_api_chswitch_done(sdata, success); 1212 if (!success) { 1213 sdata_info(sdata, 1214 "driver channel switch failed, disconnecting\n"); 1215 ieee80211_queue_work(&sdata->local->hw, 1216 &ifmgd->csa_connection_drop_work); 1217 } else { 1218 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1219 } 1220 } 1221 EXPORT_SYMBOL(ieee80211_chswitch_done); 1222 1223 static void ieee80211_chswitch_timer(struct timer_list *t) 1224 { 1225 struct ieee80211_sub_if_data *sdata = 1226 from_timer(sdata, t, u.mgd.chswitch_timer); 1227 1228 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1229 } 1230 1231 static void 1232 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1233 u64 timestamp, u32 device_timestamp, 1234 struct ieee802_11_elems *elems, 1235 bool beacon) 1236 { 1237 struct ieee80211_local *local = sdata->local; 1238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1239 struct cfg80211_bss *cbss = ifmgd->associated; 1240 struct ieee80211_chanctx_conf *conf; 1241 struct ieee80211_chanctx *chanctx; 1242 enum nl80211_band current_band; 1243 struct ieee80211_csa_ie csa_ie; 1244 struct ieee80211_channel_switch ch_switch; 1245 int res; 1246 1247 sdata_assert_lock(sdata); 1248 1249 if (!cbss) 1250 return; 1251 1252 if (local->scanning) 1253 return; 1254 1255 /* disregard subsequent announcements if we are already processing */ 1256 if (sdata->vif.csa_active) 1257 return; 1258 1259 current_band = cbss->channel->band; 1260 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1261 ifmgd->flags, 1262 ifmgd->associated->bssid, &csa_ie); 1263 if (res < 0) 1264 ieee80211_queue_work(&local->hw, 1265 &ifmgd->csa_connection_drop_work); 1266 if (res) 1267 return; 1268 1269 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1270 IEEE80211_CHAN_DISABLED)) { 1271 sdata_info(sdata, 1272 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1273 ifmgd->associated->bssid, 1274 csa_ie.chandef.chan->center_freq, 1275 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1276 csa_ie.chandef.center_freq2); 1277 ieee80211_queue_work(&local->hw, 1278 &ifmgd->csa_connection_drop_work); 1279 return; 1280 } 1281 1282 if (cfg80211_chandef_identical(&csa_ie.chandef, 1283 &sdata->vif.bss_conf.chandef)) { 1284 if (ifmgd->csa_ignored_same_chan) 1285 return; 1286 sdata_info(sdata, 1287 "AP %pM tries to chanswitch to same channel, ignore\n", 1288 ifmgd->associated->bssid); 1289 ifmgd->csa_ignored_same_chan = true; 1290 return; 1291 } 1292 1293 /* 1294 * Drop all TDLS peers - either we disconnect or move to a different 1295 * channel from this point on. There's no telling what our peer will do. 1296 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1297 * have an incompatible wider chandef. 1298 */ 1299 ieee80211_teardown_tdls_peers(sdata); 1300 1301 mutex_lock(&local->mtx); 1302 mutex_lock(&local->chanctx_mtx); 1303 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1304 lockdep_is_held(&local->chanctx_mtx)); 1305 if (!conf) { 1306 sdata_info(sdata, 1307 "no channel context assigned to vif?, disconnecting\n"); 1308 goto drop_connection; 1309 } 1310 1311 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1312 1313 if (local->use_chanctx && 1314 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1315 sdata_info(sdata, 1316 "driver doesn't support chan-switch with channel contexts\n"); 1317 goto drop_connection; 1318 } 1319 1320 ch_switch.timestamp = timestamp; 1321 ch_switch.device_timestamp = device_timestamp; 1322 ch_switch.block_tx = csa_ie.mode; 1323 ch_switch.chandef = csa_ie.chandef; 1324 ch_switch.count = csa_ie.count; 1325 1326 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1327 sdata_info(sdata, 1328 "preparing for channel switch failed, disconnecting\n"); 1329 goto drop_connection; 1330 } 1331 1332 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1333 chanctx->mode, false); 1334 if (res) { 1335 sdata_info(sdata, 1336 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1337 res); 1338 goto drop_connection; 1339 } 1340 mutex_unlock(&local->chanctx_mtx); 1341 1342 sdata->vif.csa_active = true; 1343 sdata->csa_chandef = csa_ie.chandef; 1344 sdata->csa_block_tx = csa_ie.mode; 1345 ifmgd->csa_ignored_same_chan = false; 1346 1347 if (sdata->csa_block_tx) 1348 ieee80211_stop_vif_queues(local, sdata, 1349 IEEE80211_QUEUE_STOP_REASON_CSA); 1350 mutex_unlock(&local->mtx); 1351 1352 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1353 csa_ie.count); 1354 1355 if (local->ops->channel_switch) { 1356 /* use driver's channel switch callback */ 1357 drv_channel_switch(local, sdata, &ch_switch); 1358 return; 1359 } 1360 1361 /* channel switch handled in software */ 1362 if (csa_ie.count <= 1) 1363 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1364 else 1365 mod_timer(&ifmgd->chswitch_timer, 1366 TU_TO_EXP_TIME((csa_ie.count - 1) * 1367 cbss->beacon_interval)); 1368 return; 1369 drop_connection: 1370 /* 1371 * This is just so that the disconnect flow will know that 1372 * we were trying to switch channel and failed. In case the 1373 * mode is 1 (we are not allowed to Tx), we will know not to 1374 * send a deauthentication frame. Those two fields will be 1375 * reset when the disconnection worker runs. 1376 */ 1377 sdata->vif.csa_active = true; 1378 sdata->csa_block_tx = csa_ie.mode; 1379 1380 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1381 mutex_unlock(&local->chanctx_mtx); 1382 mutex_unlock(&local->mtx); 1383 } 1384 1385 static bool 1386 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1387 struct ieee80211_channel *channel, 1388 const u8 *country_ie, u8 country_ie_len, 1389 const u8 *pwr_constr_elem, 1390 int *chan_pwr, int *pwr_reduction) 1391 { 1392 struct ieee80211_country_ie_triplet *triplet; 1393 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1394 int i, chan_increment; 1395 bool have_chan_pwr = false; 1396 1397 /* Invalid IE */ 1398 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1399 return false; 1400 1401 triplet = (void *)(country_ie + 3); 1402 country_ie_len -= 3; 1403 1404 switch (channel->band) { 1405 default: 1406 WARN_ON_ONCE(1); 1407 /* fall through */ 1408 case NL80211_BAND_2GHZ: 1409 case NL80211_BAND_60GHZ: 1410 chan_increment = 1; 1411 break; 1412 case NL80211_BAND_5GHZ: 1413 chan_increment = 4; 1414 break; 1415 } 1416 1417 /* find channel */ 1418 while (country_ie_len >= 3) { 1419 u8 first_channel = triplet->chans.first_channel; 1420 1421 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1422 goto next; 1423 1424 for (i = 0; i < triplet->chans.num_channels; i++) { 1425 if (first_channel + i * chan_increment == chan) { 1426 have_chan_pwr = true; 1427 *chan_pwr = triplet->chans.max_power; 1428 break; 1429 } 1430 } 1431 if (have_chan_pwr) 1432 break; 1433 1434 next: 1435 triplet++; 1436 country_ie_len -= 3; 1437 } 1438 1439 if (have_chan_pwr && pwr_constr_elem) 1440 *pwr_reduction = *pwr_constr_elem; 1441 else 1442 *pwr_reduction = 0; 1443 1444 return have_chan_pwr; 1445 } 1446 1447 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1448 struct ieee80211_channel *channel, 1449 const u8 *cisco_dtpc_ie, 1450 int *pwr_level) 1451 { 1452 /* From practical testing, the first data byte of the DTPC element 1453 * seems to contain the requested dBm level, and the CLI on Cisco 1454 * APs clearly state the range is -127 to 127 dBm, which indicates 1455 * a signed byte, although it seemingly never actually goes negative. 1456 * The other byte seems to always be zero. 1457 */ 1458 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1459 } 1460 1461 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1462 struct ieee80211_channel *channel, 1463 struct ieee80211_mgmt *mgmt, 1464 const u8 *country_ie, u8 country_ie_len, 1465 const u8 *pwr_constr_ie, 1466 const u8 *cisco_dtpc_ie) 1467 { 1468 bool has_80211h_pwr = false, has_cisco_pwr = false; 1469 int chan_pwr = 0, pwr_reduction_80211h = 0; 1470 int pwr_level_cisco, pwr_level_80211h; 1471 int new_ap_level; 1472 __le16 capab = mgmt->u.probe_resp.capab_info; 1473 1474 if (country_ie && 1475 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1476 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1477 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1478 sdata, channel, country_ie, country_ie_len, 1479 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1480 pwr_level_80211h = 1481 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1482 } 1483 1484 if (cisco_dtpc_ie) { 1485 ieee80211_find_cisco_dtpc( 1486 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1487 has_cisco_pwr = true; 1488 } 1489 1490 if (!has_80211h_pwr && !has_cisco_pwr) 1491 return 0; 1492 1493 /* If we have both 802.11h and Cisco DTPC, apply both limits 1494 * by picking the smallest of the two power levels advertised. 1495 */ 1496 if (has_80211h_pwr && 1497 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1498 new_ap_level = pwr_level_80211h; 1499 1500 if (sdata->ap_power_level == new_ap_level) 1501 return 0; 1502 1503 sdata_dbg(sdata, 1504 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1505 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1506 sdata->u.mgd.bssid); 1507 } else { /* has_cisco_pwr is always true here. */ 1508 new_ap_level = pwr_level_cisco; 1509 1510 if (sdata->ap_power_level == new_ap_level) 1511 return 0; 1512 1513 sdata_dbg(sdata, 1514 "Limiting TX power to %d dBm as advertised by %pM\n", 1515 pwr_level_cisco, sdata->u.mgd.bssid); 1516 } 1517 1518 sdata->ap_power_level = new_ap_level; 1519 if (__ieee80211_recalc_txpower(sdata)) 1520 return BSS_CHANGED_TXPOWER; 1521 return 0; 1522 } 1523 1524 /* powersave */ 1525 static void ieee80211_enable_ps(struct ieee80211_local *local, 1526 struct ieee80211_sub_if_data *sdata) 1527 { 1528 struct ieee80211_conf *conf = &local->hw.conf; 1529 1530 /* 1531 * If we are scanning right now then the parameters will 1532 * take effect when scan finishes. 1533 */ 1534 if (local->scanning) 1535 return; 1536 1537 if (conf->dynamic_ps_timeout > 0 && 1538 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1539 mod_timer(&local->dynamic_ps_timer, jiffies + 1540 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1541 } else { 1542 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1543 ieee80211_send_nullfunc(local, sdata, true); 1544 1545 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1546 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1547 return; 1548 1549 conf->flags |= IEEE80211_CONF_PS; 1550 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1551 } 1552 } 1553 1554 static void ieee80211_change_ps(struct ieee80211_local *local) 1555 { 1556 struct ieee80211_conf *conf = &local->hw.conf; 1557 1558 if (local->ps_sdata) { 1559 ieee80211_enable_ps(local, local->ps_sdata); 1560 } else if (conf->flags & IEEE80211_CONF_PS) { 1561 conf->flags &= ~IEEE80211_CONF_PS; 1562 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1563 del_timer_sync(&local->dynamic_ps_timer); 1564 cancel_work_sync(&local->dynamic_ps_enable_work); 1565 } 1566 } 1567 1568 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1569 { 1570 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1571 struct sta_info *sta = NULL; 1572 bool authorized = false; 1573 1574 if (!mgd->powersave) 1575 return false; 1576 1577 if (mgd->broken_ap) 1578 return false; 1579 1580 if (!mgd->associated) 1581 return false; 1582 1583 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1584 return false; 1585 1586 if (!mgd->have_beacon) 1587 return false; 1588 1589 rcu_read_lock(); 1590 sta = sta_info_get(sdata, mgd->bssid); 1591 if (sta) 1592 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1593 rcu_read_unlock(); 1594 1595 return authorized; 1596 } 1597 1598 /* need to hold RTNL or interface lock */ 1599 void ieee80211_recalc_ps(struct ieee80211_local *local) 1600 { 1601 struct ieee80211_sub_if_data *sdata, *found = NULL; 1602 int count = 0; 1603 int timeout; 1604 1605 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1606 local->ps_sdata = NULL; 1607 return; 1608 } 1609 1610 list_for_each_entry(sdata, &local->interfaces, list) { 1611 if (!ieee80211_sdata_running(sdata)) 1612 continue; 1613 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1614 /* If an AP vif is found, then disable PS 1615 * by setting the count to zero thereby setting 1616 * ps_sdata to NULL. 1617 */ 1618 count = 0; 1619 break; 1620 } 1621 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1622 continue; 1623 found = sdata; 1624 count++; 1625 } 1626 1627 if (count == 1 && ieee80211_powersave_allowed(found)) { 1628 u8 dtimper = found->u.mgd.dtim_period; 1629 1630 timeout = local->dynamic_ps_forced_timeout; 1631 if (timeout < 0) 1632 timeout = 100; 1633 local->hw.conf.dynamic_ps_timeout = timeout; 1634 1635 /* If the TIM IE is invalid, pretend the value is 1 */ 1636 if (!dtimper) 1637 dtimper = 1; 1638 1639 local->hw.conf.ps_dtim_period = dtimper; 1640 local->ps_sdata = found; 1641 } else { 1642 local->ps_sdata = NULL; 1643 } 1644 1645 ieee80211_change_ps(local); 1646 } 1647 1648 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1649 { 1650 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1651 1652 if (sdata->vif.bss_conf.ps != ps_allowed) { 1653 sdata->vif.bss_conf.ps = ps_allowed; 1654 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1655 } 1656 } 1657 1658 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1659 { 1660 struct ieee80211_local *local = 1661 container_of(work, struct ieee80211_local, 1662 dynamic_ps_disable_work); 1663 1664 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1665 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1667 } 1668 1669 ieee80211_wake_queues_by_reason(&local->hw, 1670 IEEE80211_MAX_QUEUE_MAP, 1671 IEEE80211_QUEUE_STOP_REASON_PS, 1672 false); 1673 } 1674 1675 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1676 { 1677 struct ieee80211_local *local = 1678 container_of(work, struct ieee80211_local, 1679 dynamic_ps_enable_work); 1680 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1681 struct ieee80211_if_managed *ifmgd; 1682 unsigned long flags; 1683 int q; 1684 1685 /* can only happen when PS was just disabled anyway */ 1686 if (!sdata) 1687 return; 1688 1689 ifmgd = &sdata->u.mgd; 1690 1691 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1692 return; 1693 1694 if (local->hw.conf.dynamic_ps_timeout > 0) { 1695 /* don't enter PS if TX frames are pending */ 1696 if (drv_tx_frames_pending(local)) { 1697 mod_timer(&local->dynamic_ps_timer, jiffies + 1698 msecs_to_jiffies( 1699 local->hw.conf.dynamic_ps_timeout)); 1700 return; 1701 } 1702 1703 /* 1704 * transmission can be stopped by others which leads to 1705 * dynamic_ps_timer expiry. Postpone the ps timer if it 1706 * is not the actual idle state. 1707 */ 1708 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1709 for (q = 0; q < local->hw.queues; q++) { 1710 if (local->queue_stop_reasons[q]) { 1711 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1712 flags); 1713 mod_timer(&local->dynamic_ps_timer, jiffies + 1714 msecs_to_jiffies( 1715 local->hw.conf.dynamic_ps_timeout)); 1716 return; 1717 } 1718 } 1719 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1720 } 1721 1722 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1723 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1724 if (drv_tx_frames_pending(local)) { 1725 mod_timer(&local->dynamic_ps_timer, jiffies + 1726 msecs_to_jiffies( 1727 local->hw.conf.dynamic_ps_timeout)); 1728 } else { 1729 ieee80211_send_nullfunc(local, sdata, true); 1730 /* Flush to get the tx status of nullfunc frame */ 1731 ieee80211_flush_queues(local, sdata, false); 1732 } 1733 } 1734 1735 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1736 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1737 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1738 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1739 local->hw.conf.flags |= IEEE80211_CONF_PS; 1740 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1741 } 1742 } 1743 1744 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1745 { 1746 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1747 1748 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1749 } 1750 1751 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1752 { 1753 struct delayed_work *delayed_work = to_delayed_work(work); 1754 struct ieee80211_sub_if_data *sdata = 1755 container_of(delayed_work, struct ieee80211_sub_if_data, 1756 dfs_cac_timer_work); 1757 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1758 1759 mutex_lock(&sdata->local->mtx); 1760 if (sdata->wdev.cac_started) { 1761 ieee80211_vif_release_channel(sdata); 1762 cfg80211_cac_event(sdata->dev, &chandef, 1763 NL80211_RADAR_CAC_FINISHED, 1764 GFP_KERNEL); 1765 } 1766 mutex_unlock(&sdata->local->mtx); 1767 } 1768 1769 static bool 1770 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1771 { 1772 struct ieee80211_local *local = sdata->local; 1773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1774 bool ret = false; 1775 int ac; 1776 1777 if (local->hw.queues < IEEE80211_NUM_ACS) 1778 return false; 1779 1780 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1781 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1782 int non_acm_ac; 1783 unsigned long now = jiffies; 1784 1785 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1786 tx_tspec->admitted_time && 1787 time_after(now, tx_tspec->time_slice_start + HZ)) { 1788 tx_tspec->consumed_tx_time = 0; 1789 tx_tspec->time_slice_start = now; 1790 1791 if (tx_tspec->downgraded) 1792 tx_tspec->action = 1793 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1794 } 1795 1796 switch (tx_tspec->action) { 1797 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1798 /* take the original parameters */ 1799 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1800 sdata_err(sdata, 1801 "failed to set TX queue parameters for queue %d\n", 1802 ac); 1803 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1804 tx_tspec->downgraded = false; 1805 ret = true; 1806 break; 1807 case TX_TSPEC_ACTION_DOWNGRADE: 1808 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1809 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1810 ret = true; 1811 break; 1812 } 1813 /* downgrade next lower non-ACM AC */ 1814 for (non_acm_ac = ac + 1; 1815 non_acm_ac < IEEE80211_NUM_ACS; 1816 non_acm_ac++) 1817 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1818 break; 1819 /* Usually the loop will result in using BK even if it 1820 * requires admission control, but such a configuration 1821 * makes no sense and we have to transmit somehow - the 1822 * AC selection does the same thing. 1823 * If we started out trying to downgrade from BK, then 1824 * the extra condition here might be needed. 1825 */ 1826 if (non_acm_ac >= IEEE80211_NUM_ACS) 1827 non_acm_ac = IEEE80211_AC_BK; 1828 if (drv_conf_tx(local, sdata, ac, 1829 &sdata->tx_conf[non_acm_ac])) 1830 sdata_err(sdata, 1831 "failed to set TX queue parameters for queue %d\n", 1832 ac); 1833 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1834 ret = true; 1835 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1836 tx_tspec->time_slice_start + HZ - now + 1); 1837 break; 1838 case TX_TSPEC_ACTION_NONE: 1839 /* nothing now */ 1840 break; 1841 } 1842 } 1843 1844 return ret; 1845 } 1846 1847 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1848 { 1849 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1850 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1851 } 1852 1853 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1854 { 1855 struct ieee80211_sub_if_data *sdata; 1856 1857 sdata = container_of(work, struct ieee80211_sub_if_data, 1858 u.mgd.tx_tspec_wk.work); 1859 ieee80211_sta_handle_tspec_ac_params(sdata); 1860 } 1861 1862 /* MLME */ 1863 static bool 1864 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1865 struct ieee80211_sub_if_data *sdata, 1866 const u8 *wmm_param, size_t wmm_param_len, 1867 const struct ieee80211_mu_edca_param_set *mu_edca) 1868 { 1869 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1871 size_t left; 1872 int count, ac; 1873 const u8 *pos; 1874 u8 uapsd_queues = 0; 1875 1876 if (!local->ops->conf_tx) 1877 return false; 1878 1879 if (local->hw.queues < IEEE80211_NUM_ACS) 1880 return false; 1881 1882 if (!wmm_param) 1883 return false; 1884 1885 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1886 return false; 1887 1888 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1889 uapsd_queues = ifmgd->uapsd_queues; 1890 1891 count = wmm_param[6] & 0x0f; 1892 if (count == ifmgd->wmm_last_param_set) 1893 return false; 1894 ifmgd->wmm_last_param_set = count; 1895 1896 pos = wmm_param + 8; 1897 left = wmm_param_len - 8; 1898 1899 memset(¶ms, 0, sizeof(params)); 1900 1901 sdata->wmm_acm = 0; 1902 for (; left >= 4; left -= 4, pos += 4) { 1903 int aci = (pos[0] >> 5) & 0x03; 1904 int acm = (pos[0] >> 4) & 0x01; 1905 bool uapsd = false; 1906 1907 switch (aci) { 1908 case 1: /* AC_BK */ 1909 ac = IEEE80211_AC_BK; 1910 if (acm) 1911 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1913 uapsd = true; 1914 params[ac].mu_edca = !!mu_edca; 1915 if (mu_edca) 1916 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1917 break; 1918 case 2: /* AC_VI */ 1919 ac = IEEE80211_AC_VI; 1920 if (acm) 1921 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1922 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1923 uapsd = true; 1924 params[ac].mu_edca = !!mu_edca; 1925 if (mu_edca) 1926 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1927 break; 1928 case 3: /* AC_VO */ 1929 ac = IEEE80211_AC_VO; 1930 if (acm) 1931 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1932 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1933 uapsd = true; 1934 params[ac].mu_edca = !!mu_edca; 1935 if (mu_edca) 1936 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 1937 break; 1938 case 0: /* AC_BE */ 1939 default: 1940 ac = IEEE80211_AC_BE; 1941 if (acm) 1942 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1943 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1944 uapsd = true; 1945 params[ac].mu_edca = !!mu_edca; 1946 if (mu_edca) 1947 params[ac].mu_edca_param_rec = mu_edca->ac_be; 1948 break; 1949 } 1950 1951 params[ac].aifs = pos[0] & 0x0f; 1952 1953 if (params[ac].aifs < 2) { 1954 sdata_info(sdata, 1955 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1956 params[ac].aifs, aci); 1957 params[ac].aifs = 2; 1958 } 1959 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1960 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1961 params[ac].txop = get_unaligned_le16(pos + 2); 1962 params[ac].acm = acm; 1963 params[ac].uapsd = uapsd; 1964 1965 if (params[ac].cw_min == 0 || 1966 params[ac].cw_min > params[ac].cw_max) { 1967 sdata_info(sdata, 1968 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1969 params[ac].cw_min, params[ac].cw_max, aci); 1970 return false; 1971 } 1972 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 1973 } 1974 1975 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1976 mlme_dbg(sdata, 1977 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1978 ac, params[ac].acm, 1979 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1980 params[ac].txop, params[ac].uapsd, 1981 ifmgd->tx_tspec[ac].downgraded); 1982 sdata->tx_conf[ac] = params[ac]; 1983 if (!ifmgd->tx_tspec[ac].downgraded && 1984 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1985 sdata_err(sdata, 1986 "failed to set TX queue parameters for AC %d\n", 1987 ac); 1988 } 1989 1990 /* enable WMM or activate new settings */ 1991 sdata->vif.bss_conf.qos = true; 1992 return true; 1993 } 1994 1995 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1996 { 1997 lockdep_assert_held(&sdata->local->mtx); 1998 1999 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2000 ieee80211_run_deferred_scan(sdata->local); 2001 } 2002 2003 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2004 { 2005 mutex_lock(&sdata->local->mtx); 2006 __ieee80211_stop_poll(sdata); 2007 mutex_unlock(&sdata->local->mtx); 2008 } 2009 2010 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2011 u16 capab, bool erp_valid, u8 erp) 2012 { 2013 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2014 struct ieee80211_supported_band *sband; 2015 u32 changed = 0; 2016 bool use_protection; 2017 bool use_short_preamble; 2018 bool use_short_slot; 2019 2020 sband = ieee80211_get_sband(sdata); 2021 if (!sband) 2022 return changed; 2023 2024 if (erp_valid) { 2025 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2026 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2027 } else { 2028 use_protection = false; 2029 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2030 } 2031 2032 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2033 if (sband->band == NL80211_BAND_5GHZ) 2034 use_short_slot = true; 2035 2036 if (use_protection != bss_conf->use_cts_prot) { 2037 bss_conf->use_cts_prot = use_protection; 2038 changed |= BSS_CHANGED_ERP_CTS_PROT; 2039 } 2040 2041 if (use_short_preamble != bss_conf->use_short_preamble) { 2042 bss_conf->use_short_preamble = use_short_preamble; 2043 changed |= BSS_CHANGED_ERP_PREAMBLE; 2044 } 2045 2046 if (use_short_slot != bss_conf->use_short_slot) { 2047 bss_conf->use_short_slot = use_short_slot; 2048 changed |= BSS_CHANGED_ERP_SLOT; 2049 } 2050 2051 return changed; 2052 } 2053 2054 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2055 struct cfg80211_bss *cbss, 2056 u32 bss_info_changed) 2057 { 2058 struct ieee80211_bss *bss = (void *)cbss->priv; 2059 struct ieee80211_local *local = sdata->local; 2060 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2061 2062 bss_info_changed |= BSS_CHANGED_ASSOC; 2063 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2064 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2065 2066 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2067 beacon_loss_count * bss_conf->beacon_int)); 2068 2069 sdata->u.mgd.associated = cbss; 2070 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2071 2072 ieee80211_check_rate_mask(sdata); 2073 2074 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2075 2076 if (sdata->vif.p2p || 2077 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2078 const struct cfg80211_bss_ies *ies; 2079 2080 rcu_read_lock(); 2081 ies = rcu_dereference(cbss->ies); 2082 if (ies) { 2083 int ret; 2084 2085 ret = cfg80211_get_p2p_attr( 2086 ies->data, ies->len, 2087 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2088 (u8 *) &bss_conf->p2p_noa_attr, 2089 sizeof(bss_conf->p2p_noa_attr)); 2090 if (ret >= 2) { 2091 sdata->u.mgd.p2p_noa_index = 2092 bss_conf->p2p_noa_attr.index; 2093 bss_info_changed |= BSS_CHANGED_P2P_PS; 2094 } 2095 } 2096 rcu_read_unlock(); 2097 } 2098 2099 /* just to be sure */ 2100 ieee80211_stop_poll(sdata); 2101 2102 ieee80211_led_assoc(local, 1); 2103 2104 if (sdata->u.mgd.have_beacon) { 2105 /* 2106 * If the AP is buggy we may get here with no DTIM period 2107 * known, so assume it's 1 which is the only safe assumption 2108 * in that case, although if the TIM IE is broken powersave 2109 * probably just won't work at all. 2110 */ 2111 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2112 bss_conf->beacon_rate = bss->beacon_rate; 2113 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2114 } else { 2115 bss_conf->beacon_rate = NULL; 2116 bss_conf->dtim_period = 0; 2117 } 2118 2119 bss_conf->assoc = 1; 2120 2121 /* Tell the driver to monitor connection quality (if supported) */ 2122 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2123 bss_conf->cqm_rssi_thold) 2124 bss_info_changed |= BSS_CHANGED_CQM; 2125 2126 /* Enable ARP filtering */ 2127 if (bss_conf->arp_addr_cnt) 2128 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2129 2130 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2131 2132 mutex_lock(&local->iflist_mtx); 2133 ieee80211_recalc_ps(local); 2134 mutex_unlock(&local->iflist_mtx); 2135 2136 ieee80211_recalc_smps(sdata); 2137 ieee80211_recalc_ps_vif(sdata); 2138 2139 netif_carrier_on(sdata->dev); 2140 } 2141 2142 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2143 u16 stype, u16 reason, bool tx, 2144 u8 *frame_buf) 2145 { 2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2147 struct ieee80211_local *local = sdata->local; 2148 u32 changed = 0; 2149 2150 sdata_assert_lock(sdata); 2151 2152 if (WARN_ON_ONCE(tx && !frame_buf)) 2153 return; 2154 2155 if (WARN_ON(!ifmgd->associated)) 2156 return; 2157 2158 ieee80211_stop_poll(sdata); 2159 2160 ifmgd->associated = NULL; 2161 netif_carrier_off(sdata->dev); 2162 2163 /* 2164 * if we want to get out of ps before disassoc (why?) we have 2165 * to do it before sending disassoc, as otherwise the null-packet 2166 * won't be valid. 2167 */ 2168 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2169 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2170 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2171 } 2172 local->ps_sdata = NULL; 2173 2174 /* disable per-vif ps */ 2175 ieee80211_recalc_ps_vif(sdata); 2176 2177 /* make sure ongoing transmission finishes */ 2178 synchronize_net(); 2179 2180 /* 2181 * drop any frame before deauth/disassoc, this can be data or 2182 * management frame. Since we are disconnecting, we should not 2183 * insist sending these frames which can take time and delay 2184 * the disconnection and possible the roaming. 2185 */ 2186 if (tx) 2187 ieee80211_flush_queues(local, sdata, true); 2188 2189 /* deauthenticate/disassociate now */ 2190 if (tx || frame_buf) { 2191 /* 2192 * In multi channel scenarios guarantee that the virtual 2193 * interface is granted immediate airtime to transmit the 2194 * deauthentication frame by calling mgd_prepare_tx, if the 2195 * driver requested so. 2196 */ 2197 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2198 !ifmgd->have_beacon) 2199 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2200 2201 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2202 reason, tx, frame_buf); 2203 } 2204 2205 /* flush out frame - make sure the deauth was actually sent */ 2206 if (tx) 2207 ieee80211_flush_queues(local, sdata, false); 2208 2209 /* clear bssid only after building the needed mgmt frames */ 2210 eth_zero_addr(ifmgd->bssid); 2211 2212 /* remove AP and TDLS peers */ 2213 sta_info_flush(sdata); 2214 2215 /* finally reset all BSS / config parameters */ 2216 changed |= ieee80211_reset_erp_info(sdata); 2217 2218 ieee80211_led_assoc(local, 0); 2219 changed |= BSS_CHANGED_ASSOC; 2220 sdata->vif.bss_conf.assoc = false; 2221 2222 ifmgd->p2p_noa_index = -1; 2223 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2224 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2225 2226 /* on the next assoc, re-program HT/VHT parameters */ 2227 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2228 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2229 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2230 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2231 2232 /* reset MU-MIMO ownership and group data */ 2233 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2234 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2235 memset(sdata->vif.bss_conf.mu_group.position, 0, 2236 sizeof(sdata->vif.bss_conf.mu_group.position)); 2237 changed |= BSS_CHANGED_MU_GROUPS; 2238 sdata->vif.mu_mimo_owner = false; 2239 2240 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2241 2242 del_timer_sync(&local->dynamic_ps_timer); 2243 cancel_work_sync(&local->dynamic_ps_enable_work); 2244 2245 /* Disable ARP filtering */ 2246 if (sdata->vif.bss_conf.arp_addr_cnt) 2247 changed |= BSS_CHANGED_ARP_FILTER; 2248 2249 sdata->vif.bss_conf.qos = false; 2250 changed |= BSS_CHANGED_QOS; 2251 2252 /* The BSSID (not really interesting) and HT changed */ 2253 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2254 ieee80211_bss_info_change_notify(sdata, changed); 2255 2256 /* disassociated - set to defaults now */ 2257 ieee80211_set_wmm_default(sdata, false, false); 2258 2259 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2260 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2261 del_timer_sync(&sdata->u.mgd.timer); 2262 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2263 2264 sdata->vif.bss_conf.dtim_period = 0; 2265 sdata->vif.bss_conf.beacon_rate = NULL; 2266 2267 ifmgd->have_beacon = false; 2268 2269 ifmgd->flags = 0; 2270 mutex_lock(&local->mtx); 2271 ieee80211_vif_release_channel(sdata); 2272 2273 sdata->vif.csa_active = false; 2274 ifmgd->csa_waiting_bcn = false; 2275 ifmgd->csa_ignored_same_chan = false; 2276 if (sdata->csa_block_tx) { 2277 ieee80211_wake_vif_queues(local, sdata, 2278 IEEE80211_QUEUE_STOP_REASON_CSA); 2279 sdata->csa_block_tx = false; 2280 } 2281 mutex_unlock(&local->mtx); 2282 2283 /* existing TX TSPEC sessions no longer exist */ 2284 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2285 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2286 2287 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2288 } 2289 2290 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2291 struct ieee80211_hdr *hdr) 2292 { 2293 /* 2294 * We can postpone the mgd.timer whenever receiving unicast frames 2295 * from AP because we know that the connection is working both ways 2296 * at that time. But multicast frames (and hence also beacons) must 2297 * be ignored here, because we need to trigger the timer during 2298 * data idle periods for sending the periodic probe request to the 2299 * AP we're connected to. 2300 */ 2301 if (is_multicast_ether_addr(hdr->addr1)) 2302 return; 2303 2304 ieee80211_sta_reset_conn_monitor(sdata); 2305 } 2306 2307 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2308 { 2309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2310 struct ieee80211_local *local = sdata->local; 2311 2312 mutex_lock(&local->mtx); 2313 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2314 goto out; 2315 2316 __ieee80211_stop_poll(sdata); 2317 2318 mutex_lock(&local->iflist_mtx); 2319 ieee80211_recalc_ps(local); 2320 mutex_unlock(&local->iflist_mtx); 2321 2322 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2323 goto out; 2324 2325 /* 2326 * We've received a probe response, but are not sure whether 2327 * we have or will be receiving any beacons or data, so let's 2328 * schedule the timers again, just in case. 2329 */ 2330 ieee80211_sta_reset_beacon_monitor(sdata); 2331 2332 mod_timer(&ifmgd->conn_mon_timer, 2333 round_jiffies_up(jiffies + 2334 IEEE80211_CONNECTION_IDLE_TIME)); 2335 out: 2336 mutex_unlock(&local->mtx); 2337 } 2338 2339 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2340 struct ieee80211_hdr *hdr, 2341 u16 tx_time) 2342 { 2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2344 u16 tid = ieee80211_get_tid(hdr); 2345 int ac = ieee80211_ac_from_tid(tid); 2346 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2347 unsigned long now = jiffies; 2348 2349 if (likely(!tx_tspec->admitted_time)) 2350 return; 2351 2352 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2353 tx_tspec->consumed_tx_time = 0; 2354 tx_tspec->time_slice_start = now; 2355 2356 if (tx_tspec->downgraded) { 2357 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2358 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2359 } 2360 } 2361 2362 if (tx_tspec->downgraded) 2363 return; 2364 2365 tx_tspec->consumed_tx_time += tx_time; 2366 2367 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2368 tx_tspec->downgraded = true; 2369 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2370 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2371 } 2372 } 2373 2374 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2375 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2376 { 2377 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2378 2379 if (!ieee80211_is_data(hdr->frame_control)) 2380 return; 2381 2382 if (ieee80211_is_nullfunc(hdr->frame_control) && 2383 sdata->u.mgd.probe_send_count > 0) { 2384 if (ack) 2385 ieee80211_sta_reset_conn_monitor(sdata); 2386 else 2387 sdata->u.mgd.nullfunc_failed = true; 2388 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2389 return; 2390 } 2391 2392 if (ack) 2393 ieee80211_sta_reset_conn_monitor(sdata); 2394 } 2395 2396 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2397 const u8 *src, const u8 *dst, 2398 const u8 *ssid, size_t ssid_len, 2399 struct ieee80211_channel *channel) 2400 { 2401 struct sk_buff *skb; 2402 2403 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2404 ssid, ssid_len, NULL, 0, 2405 IEEE80211_PROBE_FLAG_DIRECTED); 2406 if (skb) 2407 ieee80211_tx_skb(sdata, skb); 2408 } 2409 2410 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2411 { 2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2413 const u8 *ssid; 2414 u8 *dst = ifmgd->associated->bssid; 2415 u8 unicast_limit = max(1, max_probe_tries - 3); 2416 struct sta_info *sta; 2417 2418 /* 2419 * Try sending broadcast probe requests for the last three 2420 * probe requests after the first ones failed since some 2421 * buggy APs only support broadcast probe requests. 2422 */ 2423 if (ifmgd->probe_send_count >= unicast_limit) 2424 dst = NULL; 2425 2426 /* 2427 * When the hardware reports an accurate Tx ACK status, it's 2428 * better to send a nullfunc frame instead of a probe request, 2429 * as it will kick us off the AP quickly if we aren't associated 2430 * anymore. The timeout will be reset if the frame is ACKed by 2431 * the AP. 2432 */ 2433 ifmgd->probe_send_count++; 2434 2435 if (dst) { 2436 mutex_lock(&sdata->local->sta_mtx); 2437 sta = sta_info_get(sdata, dst); 2438 if (!WARN_ON(!sta)) 2439 ieee80211_check_fast_rx(sta); 2440 mutex_unlock(&sdata->local->sta_mtx); 2441 } 2442 2443 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2444 ifmgd->nullfunc_failed = false; 2445 ieee80211_send_nullfunc(sdata->local, sdata, false); 2446 } else { 2447 int ssid_len; 2448 2449 rcu_read_lock(); 2450 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2451 if (WARN_ON_ONCE(ssid == NULL)) 2452 ssid_len = 0; 2453 else 2454 ssid_len = ssid[1]; 2455 2456 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2457 ssid + 2, ssid_len, 2458 ifmgd->associated->channel); 2459 rcu_read_unlock(); 2460 } 2461 2462 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2463 run_again(sdata, ifmgd->probe_timeout); 2464 } 2465 2466 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2467 bool beacon) 2468 { 2469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2470 bool already = false; 2471 2472 if (!ieee80211_sdata_running(sdata)) 2473 return; 2474 2475 sdata_lock(sdata); 2476 2477 if (!ifmgd->associated) 2478 goto out; 2479 2480 mutex_lock(&sdata->local->mtx); 2481 2482 if (sdata->local->tmp_channel || sdata->local->scanning) { 2483 mutex_unlock(&sdata->local->mtx); 2484 goto out; 2485 } 2486 2487 if (beacon) { 2488 mlme_dbg_ratelimited(sdata, 2489 "detected beacon loss from AP (missed %d beacons) - probing\n", 2490 beacon_loss_count); 2491 2492 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2493 } 2494 2495 /* 2496 * The driver/our work has already reported this event or the 2497 * connection monitoring has kicked in and we have already sent 2498 * a probe request. Or maybe the AP died and the driver keeps 2499 * reporting until we disassociate... 2500 * 2501 * In either case we have to ignore the current call to this 2502 * function (except for setting the correct probe reason bit) 2503 * because otherwise we would reset the timer every time and 2504 * never check whether we received a probe response! 2505 */ 2506 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2507 already = true; 2508 2509 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2510 2511 mutex_unlock(&sdata->local->mtx); 2512 2513 if (already) 2514 goto out; 2515 2516 mutex_lock(&sdata->local->iflist_mtx); 2517 ieee80211_recalc_ps(sdata->local); 2518 mutex_unlock(&sdata->local->iflist_mtx); 2519 2520 ifmgd->probe_send_count = 0; 2521 ieee80211_mgd_probe_ap_send(sdata); 2522 out: 2523 sdata_unlock(sdata); 2524 } 2525 2526 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2527 struct ieee80211_vif *vif) 2528 { 2529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2531 struct cfg80211_bss *cbss; 2532 struct sk_buff *skb; 2533 const u8 *ssid; 2534 int ssid_len; 2535 2536 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2537 return NULL; 2538 2539 sdata_assert_lock(sdata); 2540 2541 if (ifmgd->associated) 2542 cbss = ifmgd->associated; 2543 else if (ifmgd->auth_data) 2544 cbss = ifmgd->auth_data->bss; 2545 else if (ifmgd->assoc_data) 2546 cbss = ifmgd->assoc_data->bss; 2547 else 2548 return NULL; 2549 2550 rcu_read_lock(); 2551 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2552 if (WARN_ON_ONCE(ssid == NULL)) 2553 ssid_len = 0; 2554 else 2555 ssid_len = ssid[1]; 2556 2557 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2558 (u32) -1, cbss->channel, 2559 ssid + 2, ssid_len, 2560 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2561 rcu_read_unlock(); 2562 2563 return skb; 2564 } 2565 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2566 2567 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2568 const u8 *buf, size_t len, bool tx, 2569 u16 reason) 2570 { 2571 struct ieee80211_event event = { 2572 .type = MLME_EVENT, 2573 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2574 .u.mlme.reason = reason, 2575 }; 2576 2577 if (tx) 2578 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2579 else 2580 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2581 2582 drv_event_callback(sdata->local, sdata, &event); 2583 } 2584 2585 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2586 { 2587 struct ieee80211_local *local = sdata->local; 2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2589 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2590 bool tx; 2591 2592 sdata_lock(sdata); 2593 if (!ifmgd->associated) { 2594 sdata_unlock(sdata); 2595 return; 2596 } 2597 2598 tx = !sdata->csa_block_tx; 2599 2600 /* AP is probably out of range (or not reachable for another reason) so 2601 * remove the bss struct for that AP. 2602 */ 2603 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2604 2605 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2606 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2607 tx, frame_buf); 2608 mutex_lock(&local->mtx); 2609 sdata->vif.csa_active = false; 2610 ifmgd->csa_waiting_bcn = false; 2611 if (sdata->csa_block_tx) { 2612 ieee80211_wake_vif_queues(local, sdata, 2613 IEEE80211_QUEUE_STOP_REASON_CSA); 2614 sdata->csa_block_tx = false; 2615 } 2616 mutex_unlock(&local->mtx); 2617 2618 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2619 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2620 2621 sdata_unlock(sdata); 2622 } 2623 2624 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2625 { 2626 struct ieee80211_sub_if_data *sdata = 2627 container_of(work, struct ieee80211_sub_if_data, 2628 u.mgd.beacon_connection_loss_work); 2629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2630 2631 if (ifmgd->associated) 2632 ifmgd->beacon_loss_count++; 2633 2634 if (ifmgd->connection_loss) { 2635 sdata_info(sdata, "Connection to AP %pM lost\n", 2636 ifmgd->bssid); 2637 __ieee80211_disconnect(sdata); 2638 } else { 2639 ieee80211_mgd_probe_ap(sdata, true); 2640 } 2641 } 2642 2643 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2644 { 2645 struct ieee80211_sub_if_data *sdata = 2646 container_of(work, struct ieee80211_sub_if_data, 2647 u.mgd.csa_connection_drop_work); 2648 2649 __ieee80211_disconnect(sdata); 2650 } 2651 2652 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2653 { 2654 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2655 struct ieee80211_hw *hw = &sdata->local->hw; 2656 2657 trace_api_beacon_loss(sdata); 2658 2659 sdata->u.mgd.connection_loss = false; 2660 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2661 } 2662 EXPORT_SYMBOL(ieee80211_beacon_loss); 2663 2664 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2665 { 2666 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2667 struct ieee80211_hw *hw = &sdata->local->hw; 2668 2669 trace_api_connection_loss(sdata); 2670 2671 sdata->u.mgd.connection_loss = true; 2672 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2673 } 2674 EXPORT_SYMBOL(ieee80211_connection_loss); 2675 2676 2677 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2678 bool assoc) 2679 { 2680 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2681 2682 sdata_assert_lock(sdata); 2683 2684 if (!assoc) { 2685 /* 2686 * we are not authenticated yet, the only timer that could be 2687 * running is the timeout for the authentication response which 2688 * which is not relevant anymore. 2689 */ 2690 del_timer_sync(&sdata->u.mgd.timer); 2691 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2692 2693 eth_zero_addr(sdata->u.mgd.bssid); 2694 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2695 sdata->u.mgd.flags = 0; 2696 mutex_lock(&sdata->local->mtx); 2697 ieee80211_vif_release_channel(sdata); 2698 mutex_unlock(&sdata->local->mtx); 2699 } 2700 2701 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2702 kfree(auth_data); 2703 sdata->u.mgd.auth_data = NULL; 2704 } 2705 2706 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2707 bool assoc, bool abandon) 2708 { 2709 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2710 2711 sdata_assert_lock(sdata); 2712 2713 if (!assoc) { 2714 /* 2715 * we are not associated yet, the only timer that could be 2716 * running is the timeout for the association response which 2717 * which is not relevant anymore. 2718 */ 2719 del_timer_sync(&sdata->u.mgd.timer); 2720 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2721 2722 eth_zero_addr(sdata->u.mgd.bssid); 2723 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2724 sdata->u.mgd.flags = 0; 2725 sdata->vif.mu_mimo_owner = false; 2726 2727 mutex_lock(&sdata->local->mtx); 2728 ieee80211_vif_release_channel(sdata); 2729 mutex_unlock(&sdata->local->mtx); 2730 2731 if (abandon) 2732 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2733 } 2734 2735 kfree(assoc_data); 2736 sdata->u.mgd.assoc_data = NULL; 2737 } 2738 2739 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2740 struct ieee80211_mgmt *mgmt, size_t len) 2741 { 2742 struct ieee80211_local *local = sdata->local; 2743 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2744 u8 *pos; 2745 struct ieee802_11_elems elems; 2746 u32 tx_flags = 0; 2747 2748 pos = mgmt->u.auth.variable; 2749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2750 if (!elems.challenge) 2751 return; 2752 auth_data->expected_transaction = 4; 2753 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2756 IEEE80211_TX_INTFL_MLME_CONN_TX; 2757 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2758 elems.challenge - 2, elems.challenge_len + 2, 2759 auth_data->bss->bssid, auth_data->bss->bssid, 2760 auth_data->key, auth_data->key_len, 2761 auth_data->key_idx, tx_flags); 2762 } 2763 2764 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2765 const u8 *bssid) 2766 { 2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2768 struct sta_info *sta; 2769 2770 sdata_info(sdata, "authenticated\n"); 2771 ifmgd->auth_data->done = true; 2772 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2773 ifmgd->auth_data->timeout_started = true; 2774 run_again(sdata, ifmgd->auth_data->timeout); 2775 2776 /* move station state to auth */ 2777 mutex_lock(&sdata->local->sta_mtx); 2778 sta = sta_info_get(sdata, bssid); 2779 if (!sta) { 2780 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2781 return false; 2782 } 2783 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2784 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2785 return false; 2786 } 2787 mutex_unlock(&sdata->local->sta_mtx); 2788 2789 return true; 2790 } 2791 2792 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2793 struct ieee80211_mgmt *mgmt, size_t len) 2794 { 2795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2796 u8 bssid[ETH_ALEN]; 2797 u16 auth_alg, auth_transaction, status_code; 2798 struct ieee80211_event event = { 2799 .type = MLME_EVENT, 2800 .u.mlme.data = AUTH_EVENT, 2801 }; 2802 2803 sdata_assert_lock(sdata); 2804 2805 if (len < 24 + 6) 2806 return; 2807 2808 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2809 return; 2810 2811 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2812 2813 if (!ether_addr_equal(bssid, mgmt->bssid)) 2814 return; 2815 2816 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2817 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2818 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2819 2820 if (auth_alg != ifmgd->auth_data->algorithm || 2821 (auth_alg != WLAN_AUTH_SAE && 2822 auth_transaction != ifmgd->auth_data->expected_transaction) || 2823 (auth_alg == WLAN_AUTH_SAE && 2824 (auth_transaction < ifmgd->auth_data->expected_transaction || 2825 auth_transaction > 2))) { 2826 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2827 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2828 auth_transaction, 2829 ifmgd->auth_data->expected_transaction); 2830 return; 2831 } 2832 2833 if (status_code != WLAN_STATUS_SUCCESS) { 2834 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2835 mgmt->sa, status_code); 2836 ieee80211_destroy_auth_data(sdata, false); 2837 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2838 event.u.mlme.status = MLME_DENIED; 2839 event.u.mlme.reason = status_code; 2840 drv_event_callback(sdata->local, sdata, &event); 2841 return; 2842 } 2843 2844 switch (ifmgd->auth_data->algorithm) { 2845 case WLAN_AUTH_OPEN: 2846 case WLAN_AUTH_LEAP: 2847 case WLAN_AUTH_FT: 2848 case WLAN_AUTH_SAE: 2849 case WLAN_AUTH_FILS_SK: 2850 case WLAN_AUTH_FILS_SK_PFS: 2851 case WLAN_AUTH_FILS_PK: 2852 break; 2853 case WLAN_AUTH_SHARED_KEY: 2854 if (ifmgd->auth_data->expected_transaction != 4) { 2855 ieee80211_auth_challenge(sdata, mgmt, len); 2856 /* need another frame */ 2857 return; 2858 } 2859 break; 2860 default: 2861 WARN_ONCE(1, "invalid auth alg %d", 2862 ifmgd->auth_data->algorithm); 2863 return; 2864 } 2865 2866 event.u.mlme.status = MLME_SUCCESS; 2867 drv_event_callback(sdata->local, sdata, &event); 2868 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2869 (auth_transaction == 2 && 2870 ifmgd->auth_data->expected_transaction == 2)) { 2871 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2872 goto out_err; 2873 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2874 auth_transaction == 2) { 2875 sdata_info(sdata, "SAE peer confirmed\n"); 2876 ifmgd->auth_data->peer_confirmed = true; 2877 } 2878 2879 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2880 return; 2881 out_err: 2882 mutex_unlock(&sdata->local->sta_mtx); 2883 /* ignore frame -- wait for timeout */ 2884 } 2885 2886 #define case_WLAN(type) \ 2887 case WLAN_REASON_##type: return #type 2888 2889 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2890 { 2891 switch (reason_code) { 2892 case_WLAN(UNSPECIFIED); 2893 case_WLAN(PREV_AUTH_NOT_VALID); 2894 case_WLAN(DEAUTH_LEAVING); 2895 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2896 case_WLAN(DISASSOC_AP_BUSY); 2897 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2898 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2899 case_WLAN(DISASSOC_STA_HAS_LEFT); 2900 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2901 case_WLAN(DISASSOC_BAD_POWER); 2902 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2903 case_WLAN(INVALID_IE); 2904 case_WLAN(MIC_FAILURE); 2905 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2906 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2907 case_WLAN(IE_DIFFERENT); 2908 case_WLAN(INVALID_GROUP_CIPHER); 2909 case_WLAN(INVALID_PAIRWISE_CIPHER); 2910 case_WLAN(INVALID_AKMP); 2911 case_WLAN(UNSUPP_RSN_VERSION); 2912 case_WLAN(INVALID_RSN_IE_CAP); 2913 case_WLAN(IEEE8021X_FAILED); 2914 case_WLAN(CIPHER_SUITE_REJECTED); 2915 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2916 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2917 case_WLAN(DISASSOC_LOW_ACK); 2918 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2919 case_WLAN(QSTA_LEAVE_QBSS); 2920 case_WLAN(QSTA_NOT_USE); 2921 case_WLAN(QSTA_REQUIRE_SETUP); 2922 case_WLAN(QSTA_TIMEOUT); 2923 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2924 case_WLAN(MESH_PEER_CANCELED); 2925 case_WLAN(MESH_MAX_PEERS); 2926 case_WLAN(MESH_CONFIG); 2927 case_WLAN(MESH_CLOSE); 2928 case_WLAN(MESH_MAX_RETRIES); 2929 case_WLAN(MESH_CONFIRM_TIMEOUT); 2930 case_WLAN(MESH_INVALID_GTK); 2931 case_WLAN(MESH_INCONSISTENT_PARAM); 2932 case_WLAN(MESH_INVALID_SECURITY); 2933 case_WLAN(MESH_PATH_ERROR); 2934 case_WLAN(MESH_PATH_NOFORWARD); 2935 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2936 case_WLAN(MAC_EXISTS_IN_MBSS); 2937 case_WLAN(MESH_CHAN_REGULATORY); 2938 case_WLAN(MESH_CHAN); 2939 default: return "<unknown>"; 2940 } 2941 } 2942 2943 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2944 struct ieee80211_mgmt *mgmt, size_t len) 2945 { 2946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2947 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2948 2949 sdata_assert_lock(sdata); 2950 2951 if (len < 24 + 2) 2952 return; 2953 2954 if (ifmgd->associated && 2955 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2956 const u8 *bssid = ifmgd->associated->bssid; 2957 2958 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2959 bssid, reason_code, 2960 ieee80211_get_reason_code_string(reason_code)); 2961 2962 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2963 2964 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2965 reason_code); 2966 return; 2967 } 2968 2969 if (ifmgd->assoc_data && 2970 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2971 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2972 2973 sdata_info(sdata, 2974 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2975 bssid, reason_code, 2976 ieee80211_get_reason_code_string(reason_code)); 2977 2978 ieee80211_destroy_assoc_data(sdata, false, true); 2979 2980 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2981 return; 2982 } 2983 } 2984 2985 2986 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2987 struct ieee80211_mgmt *mgmt, size_t len) 2988 { 2989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2990 u16 reason_code; 2991 2992 sdata_assert_lock(sdata); 2993 2994 if (len < 24 + 2) 2995 return; 2996 2997 if (!ifmgd->associated || 2998 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2999 return; 3000 3001 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3002 3003 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3004 mgmt->sa, reason_code, 3005 ieee80211_get_reason_code_string(reason_code)); 3006 3007 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3008 3009 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3010 } 3011 3012 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3013 u8 *supp_rates, unsigned int supp_rates_len, 3014 u32 *rates, u32 *basic_rates, 3015 bool *have_higher_than_11mbit, 3016 int *min_rate, int *min_rate_index, 3017 int shift) 3018 { 3019 int i, j; 3020 3021 for (i = 0; i < supp_rates_len; i++) { 3022 int rate = supp_rates[i] & 0x7f; 3023 bool is_basic = !!(supp_rates[i] & 0x80); 3024 3025 if ((rate * 5 * (1 << shift)) > 110) 3026 *have_higher_than_11mbit = true; 3027 3028 /* 3029 * Skip HT and VHT BSS membership selectors since they're not 3030 * rates. 3031 * 3032 * Note: Even though the membership selector and the basic 3033 * rate flag share the same bit, they are not exactly 3034 * the same. 3035 */ 3036 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3037 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3038 continue; 3039 3040 for (j = 0; j < sband->n_bitrates; j++) { 3041 struct ieee80211_rate *br; 3042 int brate; 3043 3044 br = &sband->bitrates[j]; 3045 3046 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3047 if (brate == rate) { 3048 *rates |= BIT(j); 3049 if (is_basic) 3050 *basic_rates |= BIT(j); 3051 if ((rate * 5) < *min_rate) { 3052 *min_rate = rate * 5; 3053 *min_rate_index = j; 3054 } 3055 break; 3056 } 3057 } 3058 } 3059 } 3060 3061 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3062 struct cfg80211_bss *cbss, 3063 struct ieee80211_mgmt *mgmt, size_t len) 3064 { 3065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3066 struct ieee80211_local *local = sdata->local; 3067 struct ieee80211_supported_band *sband; 3068 struct sta_info *sta; 3069 u8 *pos; 3070 u16 capab_info, aid; 3071 struct ieee802_11_elems elems; 3072 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3073 const struct cfg80211_bss_ies *bss_ies = NULL; 3074 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3075 u32 changed = 0; 3076 int err; 3077 bool ret; 3078 3079 /* AssocResp and ReassocResp have identical structure */ 3080 3081 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3082 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3083 3084 /* 3085 * The 5 MSB of the AID field are reserved 3086 * (802.11-2016 9.4.1.8 AID field) 3087 */ 3088 aid &= 0x7ff; 3089 3090 ifmgd->broken_ap = false; 3091 3092 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3093 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3094 aid); 3095 aid = 0; 3096 ifmgd->broken_ap = true; 3097 } 3098 3099 pos = mgmt->u.assoc_resp.variable; 3100 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3101 3102 if (!elems.supp_rates) { 3103 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3104 return false; 3105 } 3106 3107 ifmgd->aid = aid; 3108 ifmgd->tdls_chan_switch_prohibited = 3109 elems.ext_capab && elems.ext_capab_len >= 5 && 3110 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3111 3112 /* 3113 * Some APs are erroneously not including some information in their 3114 * (re)association response frames. Try to recover by using the data 3115 * from the beacon or probe response. This seems to afflict mobile 3116 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3117 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3118 */ 3119 if ((assoc_data->wmm && !elems.wmm_param) || 3120 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3121 (!elems.ht_cap_elem || !elems.ht_operation)) || 3122 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3123 (!elems.vht_cap_elem || !elems.vht_operation))) { 3124 const struct cfg80211_bss_ies *ies; 3125 struct ieee802_11_elems bss_elems; 3126 3127 rcu_read_lock(); 3128 ies = rcu_dereference(cbss->ies); 3129 if (ies) 3130 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3131 GFP_ATOMIC); 3132 rcu_read_unlock(); 3133 if (!bss_ies) 3134 return false; 3135 3136 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3137 false, &bss_elems); 3138 if (assoc_data->wmm && 3139 !elems.wmm_param && bss_elems.wmm_param) { 3140 elems.wmm_param = bss_elems.wmm_param; 3141 sdata_info(sdata, 3142 "AP bug: WMM param missing from AssocResp\n"); 3143 } 3144 3145 /* 3146 * Also check if we requested HT/VHT, otherwise the AP doesn't 3147 * have to include the IEs in the (re)association response. 3148 */ 3149 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3150 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3151 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3152 sdata_info(sdata, 3153 "AP bug: HT capability missing from AssocResp\n"); 3154 } 3155 if (!elems.ht_operation && bss_elems.ht_operation && 3156 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3157 elems.ht_operation = bss_elems.ht_operation; 3158 sdata_info(sdata, 3159 "AP bug: HT operation missing from AssocResp\n"); 3160 } 3161 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3162 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3163 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3164 sdata_info(sdata, 3165 "AP bug: VHT capa missing from AssocResp\n"); 3166 } 3167 if (!elems.vht_operation && bss_elems.vht_operation && 3168 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3169 elems.vht_operation = bss_elems.vht_operation; 3170 sdata_info(sdata, 3171 "AP bug: VHT operation missing from AssocResp\n"); 3172 } 3173 } 3174 3175 /* 3176 * We previously checked these in the beacon/probe response, so 3177 * they should be present here. This is just a safety net. 3178 */ 3179 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3180 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3181 sdata_info(sdata, 3182 "HT AP is missing WMM params or HT capability/operation\n"); 3183 ret = false; 3184 goto out; 3185 } 3186 3187 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3188 (!elems.vht_cap_elem || !elems.vht_operation)) { 3189 sdata_info(sdata, 3190 "VHT AP is missing VHT capability/operation\n"); 3191 ret = false; 3192 goto out; 3193 } 3194 3195 mutex_lock(&sdata->local->sta_mtx); 3196 /* 3197 * station info was already allocated and inserted before 3198 * the association and should be available to us 3199 */ 3200 sta = sta_info_get(sdata, cbss->bssid); 3201 if (WARN_ON(!sta)) { 3202 mutex_unlock(&sdata->local->sta_mtx); 3203 ret = false; 3204 goto out; 3205 } 3206 3207 sband = ieee80211_get_sband(sdata); 3208 if (!sband) { 3209 mutex_unlock(&sdata->local->sta_mtx); 3210 ret = false; 3211 goto out; 3212 } 3213 3214 /* 3215 * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark 3216 * HE as disabled. If on the 5GHz band, make sure it supports VHT. 3217 */ 3218 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 3219 (sband->band == NL80211_BAND_5GHZ && 3220 ifmgd->flags & IEEE80211_STA_DISABLE_VHT) || 3221 (!elems.he_cap && !elems.he_operation)) 3222 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 3223 3224 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3225 (!elems.he_cap || !elems.he_operation)) { 3226 mutex_unlock(&sdata->local->sta_mtx); 3227 sdata_info(sdata, 3228 "HE AP is missing HE capability/operation\n"); 3229 ret = false; 3230 goto out; 3231 } 3232 3233 /* Set up internal HT/VHT capabilities */ 3234 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3235 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3236 elems.ht_cap_elem, sta); 3237 3238 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3239 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3240 elems.vht_cap_elem, sta); 3241 3242 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3243 elems.he_cap) { 3244 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3245 elems.he_cap, 3246 elems.he_cap_len, 3247 sta); 3248 3249 bss_conf->he_support = sta->sta.he_cap.has_he; 3250 } else { 3251 bss_conf->he_support = false; 3252 } 3253 3254 if (bss_conf->he_support) { 3255 bss_conf->bss_color = 3256 le32_get_bits(elems.he_operation->he_oper_params, 3257 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3258 3259 bss_conf->htc_trig_based_pkt_ext = 3260 le32_get_bits(elems.he_operation->he_oper_params, 3261 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3262 bss_conf->frame_time_rts_th = 3263 le32_get_bits(elems.he_operation->he_oper_params, 3264 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3265 3266 bss_conf->multi_sta_back_32bit = 3267 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3268 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3269 3270 bss_conf->ack_enabled = 3271 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3272 IEEE80211_HE_MAC_CAP2_ACK_EN; 3273 3274 bss_conf->uora_exists = !!elems.uora_element; 3275 if (elems.uora_element) 3276 bss_conf->uora_ocw_range = elems.uora_element[0]; 3277 3278 /* TODO: OPEN: what happens if BSS color disable is set? */ 3279 } 3280 3281 /* 3282 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3283 * in their association response, so ignore that data for our own 3284 * configuration. If it changed since the last beacon, we'll get the 3285 * next beacon and update then. 3286 */ 3287 3288 /* 3289 * If an operating mode notification IE is present, override the 3290 * NSS calculation (that would be done in rate_control_rate_init()) 3291 * and use the # of streams from that element. 3292 */ 3293 if (elems.opmode_notif && 3294 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3295 u8 nss; 3296 3297 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3298 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3299 nss += 1; 3300 sta->sta.rx_nss = nss; 3301 } 3302 3303 rate_control_rate_init(sta); 3304 3305 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3306 set_sta_flag(sta, WLAN_STA_MFP); 3307 sta->sta.mfp = true; 3308 } else { 3309 sta->sta.mfp = false; 3310 } 3311 3312 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3313 3314 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3315 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3316 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3317 if (err) { 3318 sdata_info(sdata, 3319 "failed to move station %pM to desired state\n", 3320 sta->sta.addr); 3321 WARN_ON(__sta_info_destroy(sta)); 3322 mutex_unlock(&sdata->local->sta_mtx); 3323 ret = false; 3324 goto out; 3325 } 3326 3327 mutex_unlock(&sdata->local->sta_mtx); 3328 3329 /* 3330 * Always handle WMM once after association regardless 3331 * of the first value the AP uses. Setting -1 here has 3332 * that effect because the AP values is an unsigned 3333 * 4-bit value. 3334 */ 3335 ifmgd->wmm_last_param_set = -1; 3336 3337 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3338 ieee80211_set_wmm_default(sdata, false, false); 3339 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3340 elems.wmm_param_len, 3341 elems.mu_edca_param_set)) { 3342 /* still enable QoS since we might have HT/VHT */ 3343 ieee80211_set_wmm_default(sdata, false, true); 3344 /* set the disable-WMM flag in this case to disable 3345 * tracking WMM parameter changes in the beacon if 3346 * the parameters weren't actually valid. Doing so 3347 * avoids changing parameters very strangely when 3348 * the AP is going back and forth between valid and 3349 * invalid parameters. 3350 */ 3351 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3352 } 3353 changed |= BSS_CHANGED_QOS; 3354 3355 if (elems.max_idle_period_ie) { 3356 bss_conf->max_idle_period = 3357 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3358 bss_conf->protected_keep_alive = 3359 !!(elems.max_idle_period_ie->idle_options & 3360 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3361 changed |= BSS_CHANGED_KEEP_ALIVE; 3362 } else { 3363 bss_conf->max_idle_period = 0; 3364 bss_conf->protected_keep_alive = false; 3365 } 3366 3367 /* set AID and assoc capability, 3368 * ieee80211_set_associated() will tell the driver */ 3369 bss_conf->aid = aid; 3370 bss_conf->assoc_capability = capab_info; 3371 ieee80211_set_associated(sdata, cbss, changed); 3372 3373 /* 3374 * If we're using 4-addr mode, let the AP know that we're 3375 * doing so, so that it can create the STA VLAN on its side 3376 */ 3377 if (ifmgd->use_4addr) 3378 ieee80211_send_4addr_nullfunc(local, sdata); 3379 3380 /* 3381 * Start timer to probe the connection to the AP now. 3382 * Also start the timer that will detect beacon loss. 3383 */ 3384 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3385 ieee80211_sta_reset_beacon_monitor(sdata); 3386 3387 ret = true; 3388 out: 3389 kfree(bss_ies); 3390 return ret; 3391 } 3392 3393 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3394 struct ieee80211_mgmt *mgmt, 3395 size_t len) 3396 { 3397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3398 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3399 u16 capab_info, status_code, aid; 3400 struct ieee802_11_elems elems; 3401 int ac, uapsd_queues = -1; 3402 u8 *pos; 3403 bool reassoc; 3404 struct cfg80211_bss *bss; 3405 struct ieee80211_event event = { 3406 .type = MLME_EVENT, 3407 .u.mlme.data = ASSOC_EVENT, 3408 }; 3409 3410 sdata_assert_lock(sdata); 3411 3412 if (!assoc_data) 3413 return; 3414 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3415 return; 3416 3417 /* 3418 * AssocResp and ReassocResp have identical structure, so process both 3419 * of them in this function. 3420 */ 3421 3422 if (len < 24 + 6) 3423 return; 3424 3425 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3426 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3427 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3428 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3429 3430 sdata_info(sdata, 3431 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3432 reassoc ? "Rea" : "A", mgmt->sa, 3433 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3434 3435 if (assoc_data->fils_kek_len && 3436 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3437 return; 3438 3439 pos = mgmt->u.assoc_resp.variable; 3440 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3441 3442 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3443 elems.timeout_int && 3444 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3445 u32 tu, ms; 3446 tu = le32_to_cpu(elems.timeout_int->value); 3447 ms = tu * 1024 / 1000; 3448 sdata_info(sdata, 3449 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3450 mgmt->sa, tu, ms); 3451 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3452 assoc_data->timeout_started = true; 3453 if (ms > IEEE80211_ASSOC_TIMEOUT) 3454 run_again(sdata, assoc_data->timeout); 3455 return; 3456 } 3457 3458 bss = assoc_data->bss; 3459 3460 if (status_code != WLAN_STATUS_SUCCESS) { 3461 sdata_info(sdata, "%pM denied association (code=%d)\n", 3462 mgmt->sa, status_code); 3463 ieee80211_destroy_assoc_data(sdata, false, false); 3464 event.u.mlme.status = MLME_DENIED; 3465 event.u.mlme.reason = status_code; 3466 drv_event_callback(sdata->local, sdata, &event); 3467 } else { 3468 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3469 /* oops -- internal error -- send timeout for now */ 3470 ieee80211_destroy_assoc_data(sdata, false, false); 3471 cfg80211_assoc_timeout(sdata->dev, bss); 3472 return; 3473 } 3474 event.u.mlme.status = MLME_SUCCESS; 3475 drv_event_callback(sdata->local, sdata, &event); 3476 sdata_info(sdata, "associated\n"); 3477 3478 /* 3479 * destroy assoc_data afterwards, as otherwise an idle 3480 * recalc after assoc_data is NULL but before associated 3481 * is set can cause the interface to go idle 3482 */ 3483 ieee80211_destroy_assoc_data(sdata, true, false); 3484 3485 /* get uapsd queues configuration */ 3486 uapsd_queues = 0; 3487 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3488 if (sdata->tx_conf[ac].uapsd) 3489 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3490 } 3491 3492 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3493 } 3494 3495 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3496 struct ieee80211_mgmt *mgmt, size_t len, 3497 struct ieee80211_rx_status *rx_status, 3498 struct ieee802_11_elems *elems) 3499 { 3500 struct ieee80211_local *local = sdata->local; 3501 struct ieee80211_bss *bss; 3502 struct ieee80211_channel *channel; 3503 3504 sdata_assert_lock(sdata); 3505 3506 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3507 if (!channel) 3508 return; 3509 3510 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3511 channel); 3512 if (bss) { 3513 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3514 ieee80211_rx_bss_put(local, bss); 3515 } 3516 } 3517 3518 3519 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3520 struct sk_buff *skb) 3521 { 3522 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3523 struct ieee80211_if_managed *ifmgd; 3524 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3525 size_t baselen, len = skb->len; 3526 struct ieee802_11_elems elems; 3527 3528 ifmgd = &sdata->u.mgd; 3529 3530 sdata_assert_lock(sdata); 3531 3532 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3533 return; /* ignore ProbeResp to foreign address */ 3534 3535 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3536 if (baselen > len) 3537 return; 3538 3539 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3540 false, &elems); 3541 3542 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3543 3544 if (ifmgd->associated && 3545 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3546 ieee80211_reset_ap_probe(sdata); 3547 } 3548 3549 /* 3550 * This is the canonical list of information elements we care about, 3551 * the filter code also gives us all changes to the Microsoft OUI 3552 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3553 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3554 * changes to requested client power. 3555 * 3556 * We implement beacon filtering in software since that means we can 3557 * avoid processing the frame here and in cfg80211, and userspace 3558 * will not be able to tell whether the hardware supports it or not. 3559 * 3560 * XXX: This list needs to be dynamic -- userspace needs to be able to 3561 * add items it requires. It also needs to be able to tell us to 3562 * look out for other vendor IEs. 3563 */ 3564 static const u64 care_about_ies = 3565 (1ULL << WLAN_EID_COUNTRY) | 3566 (1ULL << WLAN_EID_ERP_INFO) | 3567 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3568 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3569 (1ULL << WLAN_EID_HT_CAPABILITY) | 3570 (1ULL << WLAN_EID_HT_OPERATION) | 3571 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3572 3573 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3574 struct ieee80211_if_managed *ifmgd, 3575 struct ieee80211_bss_conf *bss_conf, 3576 struct ieee80211_local *local, 3577 struct ieee80211_rx_status *rx_status) 3578 { 3579 /* Track average RSSI from the Beacon frames of the current AP */ 3580 3581 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3582 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3583 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3584 ifmgd->last_cqm_event_signal = 0; 3585 ifmgd->count_beacon_signal = 1; 3586 ifmgd->last_ave_beacon_signal = 0; 3587 } else { 3588 ifmgd->count_beacon_signal++; 3589 } 3590 3591 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3592 3593 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3594 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3595 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3596 int last_sig = ifmgd->last_ave_beacon_signal; 3597 struct ieee80211_event event = { 3598 .type = RSSI_EVENT, 3599 }; 3600 3601 /* 3602 * if signal crosses either of the boundaries, invoke callback 3603 * with appropriate parameters 3604 */ 3605 if (sig > ifmgd->rssi_max_thold && 3606 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3607 ifmgd->last_ave_beacon_signal = sig; 3608 event.u.rssi.data = RSSI_EVENT_HIGH; 3609 drv_event_callback(local, sdata, &event); 3610 } else if (sig < ifmgd->rssi_min_thold && 3611 (last_sig >= ifmgd->rssi_max_thold || 3612 last_sig == 0)) { 3613 ifmgd->last_ave_beacon_signal = sig; 3614 event.u.rssi.data = RSSI_EVENT_LOW; 3615 drv_event_callback(local, sdata, &event); 3616 } 3617 } 3618 3619 if (bss_conf->cqm_rssi_thold && 3620 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3621 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3622 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3623 int last_event = ifmgd->last_cqm_event_signal; 3624 int thold = bss_conf->cqm_rssi_thold; 3625 int hyst = bss_conf->cqm_rssi_hyst; 3626 3627 if (sig < thold && 3628 (last_event == 0 || sig < last_event - hyst)) { 3629 ifmgd->last_cqm_event_signal = sig; 3630 ieee80211_cqm_rssi_notify( 3631 &sdata->vif, 3632 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3633 sig, GFP_KERNEL); 3634 } else if (sig > thold && 3635 (last_event == 0 || sig > last_event + hyst)) { 3636 ifmgd->last_cqm_event_signal = sig; 3637 ieee80211_cqm_rssi_notify( 3638 &sdata->vif, 3639 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3640 sig, GFP_KERNEL); 3641 } 3642 } 3643 3644 if (bss_conf->cqm_rssi_low && 3645 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3646 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3647 int last_event = ifmgd->last_cqm_event_signal; 3648 int low = bss_conf->cqm_rssi_low; 3649 int high = bss_conf->cqm_rssi_high; 3650 3651 if (sig < low && 3652 (last_event == 0 || last_event >= low)) { 3653 ifmgd->last_cqm_event_signal = sig; 3654 ieee80211_cqm_rssi_notify( 3655 &sdata->vif, 3656 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3657 sig, GFP_KERNEL); 3658 } else if (sig > high && 3659 (last_event == 0 || last_event <= high)) { 3660 ifmgd->last_cqm_event_signal = sig; 3661 ieee80211_cqm_rssi_notify( 3662 &sdata->vif, 3663 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3664 sig, GFP_KERNEL); 3665 } 3666 } 3667 } 3668 3669 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3670 struct ieee80211_mgmt *mgmt, size_t len, 3671 struct ieee80211_rx_status *rx_status) 3672 { 3673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3674 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3675 size_t baselen; 3676 struct ieee802_11_elems elems; 3677 struct ieee80211_local *local = sdata->local; 3678 struct ieee80211_chanctx_conf *chanctx_conf; 3679 struct ieee80211_channel *chan; 3680 struct sta_info *sta; 3681 u32 changed = 0; 3682 bool erp_valid; 3683 u8 erp_value = 0; 3684 u32 ncrc; 3685 u8 *bssid; 3686 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3687 3688 sdata_assert_lock(sdata); 3689 3690 /* Process beacon from the current BSS */ 3691 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3692 if (baselen > len) 3693 return; 3694 3695 rcu_read_lock(); 3696 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3697 if (!chanctx_conf) { 3698 rcu_read_unlock(); 3699 return; 3700 } 3701 3702 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3703 rcu_read_unlock(); 3704 return; 3705 } 3706 chan = chanctx_conf->def.chan; 3707 rcu_read_unlock(); 3708 3709 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3710 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3711 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3712 len - baselen, false, &elems); 3713 3714 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3715 if (elems.tim && !elems.parse_error) { 3716 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3717 ifmgd->dtim_period = tim_ie->dtim_period; 3718 } 3719 ifmgd->have_beacon = true; 3720 ifmgd->assoc_data->need_beacon = false; 3721 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3722 sdata->vif.bss_conf.sync_tsf = 3723 le64_to_cpu(mgmt->u.beacon.timestamp); 3724 sdata->vif.bss_conf.sync_device_ts = 3725 rx_status->device_timestamp; 3726 if (elems.tim) 3727 sdata->vif.bss_conf.sync_dtim_count = 3728 elems.tim->dtim_count; 3729 else 3730 sdata->vif.bss_conf.sync_dtim_count = 0; 3731 } 3732 /* continue assoc process */ 3733 ifmgd->assoc_data->timeout = jiffies; 3734 ifmgd->assoc_data->timeout_started = true; 3735 run_again(sdata, ifmgd->assoc_data->timeout); 3736 return; 3737 } 3738 3739 if (!ifmgd->associated || 3740 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3741 return; 3742 bssid = ifmgd->associated->bssid; 3743 3744 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3745 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3746 local, rx_status); 3747 3748 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3749 mlme_dbg_ratelimited(sdata, 3750 "cancelling AP probe due to a received beacon\n"); 3751 ieee80211_reset_ap_probe(sdata); 3752 } 3753 3754 /* 3755 * Push the beacon loss detection into the future since 3756 * we are processing a beacon from the AP just now. 3757 */ 3758 ieee80211_sta_reset_beacon_monitor(sdata); 3759 3760 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3761 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3762 len - baselen, false, &elems, 3763 care_about_ies, ncrc); 3764 3765 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3766 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3767 if (local->hw.conf.dynamic_ps_timeout > 0) { 3768 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3769 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3770 ieee80211_hw_config(local, 3771 IEEE80211_CONF_CHANGE_PS); 3772 } 3773 ieee80211_send_nullfunc(local, sdata, false); 3774 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3775 local->pspolling = true; 3776 3777 /* 3778 * Here is assumed that the driver will be 3779 * able to send ps-poll frame and receive a 3780 * response even though power save mode is 3781 * enabled, but some drivers might require 3782 * to disable power save here. This needs 3783 * to be investigated. 3784 */ 3785 ieee80211_send_pspoll(local, sdata); 3786 } 3787 } 3788 3789 if (sdata->vif.p2p || 3790 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3791 struct ieee80211_p2p_noa_attr noa = {}; 3792 int ret; 3793 3794 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3795 len - baselen, 3796 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3797 (u8 *) &noa, sizeof(noa)); 3798 if (ret >= 2) { 3799 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3800 /* valid noa_attr and index changed */ 3801 sdata->u.mgd.p2p_noa_index = noa.index; 3802 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3803 changed |= BSS_CHANGED_P2P_PS; 3804 /* 3805 * make sure we update all information, the CRC 3806 * mechanism doesn't look at P2P attributes. 3807 */ 3808 ifmgd->beacon_crc_valid = false; 3809 } 3810 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3811 /* noa_attr not found and we had valid noa_attr before */ 3812 sdata->u.mgd.p2p_noa_index = -1; 3813 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3814 changed |= BSS_CHANGED_P2P_PS; 3815 ifmgd->beacon_crc_valid = false; 3816 } 3817 } 3818 3819 if (ifmgd->csa_waiting_bcn) 3820 ieee80211_chswitch_post_beacon(sdata); 3821 3822 /* 3823 * Update beacon timing and dtim count on every beacon appearance. This 3824 * will allow the driver to use the most updated values. Do it before 3825 * comparing this one with last received beacon. 3826 * IMPORTANT: These parameters would possibly be out of sync by the time 3827 * the driver will use them. The synchronized view is currently 3828 * guaranteed only in certain callbacks. 3829 */ 3830 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3831 sdata->vif.bss_conf.sync_tsf = 3832 le64_to_cpu(mgmt->u.beacon.timestamp); 3833 sdata->vif.bss_conf.sync_device_ts = 3834 rx_status->device_timestamp; 3835 if (elems.tim) 3836 sdata->vif.bss_conf.sync_dtim_count = 3837 elems.tim->dtim_count; 3838 else 3839 sdata->vif.bss_conf.sync_dtim_count = 0; 3840 } 3841 3842 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3843 return; 3844 ifmgd->beacon_crc = ncrc; 3845 ifmgd->beacon_crc_valid = true; 3846 3847 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3848 3849 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3850 rx_status->device_timestamp, 3851 &elems, true); 3852 3853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3854 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3855 elems.wmm_param_len, 3856 elems.mu_edca_param_set)) 3857 changed |= BSS_CHANGED_QOS; 3858 3859 /* 3860 * If we haven't had a beacon before, tell the driver about the 3861 * DTIM period (and beacon timing if desired) now. 3862 */ 3863 if (!ifmgd->have_beacon) { 3864 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3865 if (elems.tim) 3866 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3867 else 3868 bss_conf->dtim_period = 1; 3869 3870 changed |= BSS_CHANGED_BEACON_INFO; 3871 ifmgd->have_beacon = true; 3872 3873 mutex_lock(&local->iflist_mtx); 3874 ieee80211_recalc_ps(local); 3875 mutex_unlock(&local->iflist_mtx); 3876 3877 ieee80211_recalc_ps_vif(sdata); 3878 } 3879 3880 if (elems.erp_info) { 3881 erp_valid = true; 3882 erp_value = elems.erp_info[0]; 3883 } else { 3884 erp_valid = false; 3885 } 3886 changed |= ieee80211_handle_bss_capability(sdata, 3887 le16_to_cpu(mgmt->u.beacon.capab_info), 3888 erp_valid, erp_value); 3889 3890 mutex_lock(&local->sta_mtx); 3891 sta = sta_info_get(sdata, bssid); 3892 3893 if (ieee80211_config_bw(sdata, sta, 3894 elems.ht_cap_elem, elems.ht_operation, 3895 elems.vht_operation, elems.he_operation, 3896 bssid, &changed)) { 3897 mutex_unlock(&local->sta_mtx); 3898 sdata_info(sdata, 3899 "failed to follow AP %pM bandwidth change, disconnect\n", 3900 bssid); 3901 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3902 WLAN_REASON_DEAUTH_LEAVING, 3903 true, deauth_buf); 3904 ieee80211_report_disconnect(sdata, deauth_buf, 3905 sizeof(deauth_buf), true, 3906 WLAN_REASON_DEAUTH_LEAVING); 3907 return; 3908 } 3909 3910 if (sta && elems.opmode_notif) 3911 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3912 rx_status->band); 3913 mutex_unlock(&local->sta_mtx); 3914 3915 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3916 elems.country_elem, 3917 elems.country_elem_len, 3918 elems.pwr_constr_elem, 3919 elems.cisco_dtpc_elem); 3920 3921 ieee80211_bss_info_change_notify(sdata, changed); 3922 } 3923 3924 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3925 struct sk_buff *skb) 3926 { 3927 struct ieee80211_rx_status *rx_status; 3928 struct ieee80211_mgmt *mgmt; 3929 u16 fc; 3930 struct ieee802_11_elems elems; 3931 int ies_len; 3932 3933 rx_status = (struct ieee80211_rx_status *) skb->cb; 3934 mgmt = (struct ieee80211_mgmt *) skb->data; 3935 fc = le16_to_cpu(mgmt->frame_control); 3936 3937 sdata_lock(sdata); 3938 3939 switch (fc & IEEE80211_FCTL_STYPE) { 3940 case IEEE80211_STYPE_BEACON: 3941 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3942 break; 3943 case IEEE80211_STYPE_PROBE_RESP: 3944 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3945 break; 3946 case IEEE80211_STYPE_AUTH: 3947 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3948 break; 3949 case IEEE80211_STYPE_DEAUTH: 3950 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3951 break; 3952 case IEEE80211_STYPE_DISASSOC: 3953 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3954 break; 3955 case IEEE80211_STYPE_ASSOC_RESP: 3956 case IEEE80211_STYPE_REASSOC_RESP: 3957 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3958 break; 3959 case IEEE80211_STYPE_ACTION: 3960 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3961 ies_len = skb->len - 3962 offsetof(struct ieee80211_mgmt, 3963 u.action.u.chan_switch.variable); 3964 3965 if (ies_len < 0) 3966 break; 3967 3968 ieee802_11_parse_elems( 3969 mgmt->u.action.u.chan_switch.variable, 3970 ies_len, true, &elems); 3971 3972 if (elems.parse_error) 3973 break; 3974 3975 ieee80211_sta_process_chanswitch(sdata, 3976 rx_status->mactime, 3977 rx_status->device_timestamp, 3978 &elems, false); 3979 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3980 ies_len = skb->len - 3981 offsetof(struct ieee80211_mgmt, 3982 u.action.u.ext_chan_switch.variable); 3983 3984 if (ies_len < 0) 3985 break; 3986 3987 ieee802_11_parse_elems( 3988 mgmt->u.action.u.ext_chan_switch.variable, 3989 ies_len, true, &elems); 3990 3991 if (elems.parse_error) 3992 break; 3993 3994 /* for the handling code pretend this was also an IE */ 3995 elems.ext_chansw_ie = 3996 &mgmt->u.action.u.ext_chan_switch.data; 3997 3998 ieee80211_sta_process_chanswitch(sdata, 3999 rx_status->mactime, 4000 rx_status->device_timestamp, 4001 &elems, false); 4002 } 4003 break; 4004 } 4005 sdata_unlock(sdata); 4006 } 4007 4008 static void ieee80211_sta_timer(struct timer_list *t) 4009 { 4010 struct ieee80211_sub_if_data *sdata = 4011 from_timer(sdata, t, u.mgd.timer); 4012 4013 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4014 } 4015 4016 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4017 u8 *bssid, u8 reason, bool tx) 4018 { 4019 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4020 4021 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4022 tx, frame_buf); 4023 4024 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4025 reason); 4026 } 4027 4028 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4029 { 4030 struct ieee80211_local *local = sdata->local; 4031 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4032 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4033 u32 tx_flags = 0; 4034 u16 trans = 1; 4035 u16 status = 0; 4036 u16 prepare_tx_duration = 0; 4037 4038 sdata_assert_lock(sdata); 4039 4040 if (WARN_ON_ONCE(!auth_data)) 4041 return -EINVAL; 4042 4043 auth_data->tries++; 4044 4045 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4046 sdata_info(sdata, "authentication with %pM timed out\n", 4047 auth_data->bss->bssid); 4048 4049 /* 4050 * Most likely AP is not in the range so remove the 4051 * bss struct for that AP. 4052 */ 4053 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4054 4055 return -ETIMEDOUT; 4056 } 4057 4058 if (auth_data->algorithm == WLAN_AUTH_SAE) 4059 prepare_tx_duration = 4060 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4061 4062 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4063 4064 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4065 auth_data->bss->bssid, auth_data->tries, 4066 IEEE80211_AUTH_MAX_TRIES); 4067 4068 auth_data->expected_transaction = 2; 4069 4070 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4071 trans = auth_data->sae_trans; 4072 status = auth_data->sae_status; 4073 auth_data->expected_transaction = trans; 4074 } 4075 4076 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4077 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4078 IEEE80211_TX_INTFL_MLME_CONN_TX; 4079 4080 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4081 auth_data->data, auth_data->data_len, 4082 auth_data->bss->bssid, 4083 auth_data->bss->bssid, NULL, 0, 0, 4084 tx_flags); 4085 4086 if (tx_flags == 0) { 4087 if (auth_data->algorithm == WLAN_AUTH_SAE) 4088 auth_data->timeout = jiffies + 4089 IEEE80211_AUTH_TIMEOUT_SAE; 4090 else 4091 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4092 } else { 4093 auth_data->timeout = 4094 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4095 } 4096 4097 auth_data->timeout_started = true; 4098 run_again(sdata, auth_data->timeout); 4099 4100 return 0; 4101 } 4102 4103 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4104 { 4105 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4106 struct ieee80211_local *local = sdata->local; 4107 4108 sdata_assert_lock(sdata); 4109 4110 assoc_data->tries++; 4111 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4112 sdata_info(sdata, "association with %pM timed out\n", 4113 assoc_data->bss->bssid); 4114 4115 /* 4116 * Most likely AP is not in the range so remove the 4117 * bss struct for that AP. 4118 */ 4119 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4120 4121 return -ETIMEDOUT; 4122 } 4123 4124 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4125 assoc_data->bss->bssid, assoc_data->tries, 4126 IEEE80211_ASSOC_MAX_TRIES); 4127 ieee80211_send_assoc(sdata); 4128 4129 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4130 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4131 assoc_data->timeout_started = true; 4132 run_again(sdata, assoc_data->timeout); 4133 } else { 4134 assoc_data->timeout = 4135 round_jiffies_up(jiffies + 4136 IEEE80211_ASSOC_TIMEOUT_LONG); 4137 assoc_data->timeout_started = true; 4138 run_again(sdata, assoc_data->timeout); 4139 } 4140 4141 return 0; 4142 } 4143 4144 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4145 __le16 fc, bool acked) 4146 { 4147 struct ieee80211_local *local = sdata->local; 4148 4149 sdata->u.mgd.status_fc = fc; 4150 sdata->u.mgd.status_acked = acked; 4151 sdata->u.mgd.status_received = true; 4152 4153 ieee80211_queue_work(&local->hw, &sdata->work); 4154 } 4155 4156 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4157 { 4158 struct ieee80211_local *local = sdata->local; 4159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4160 4161 sdata_lock(sdata); 4162 4163 if (ifmgd->status_received) { 4164 __le16 fc = ifmgd->status_fc; 4165 bool status_acked = ifmgd->status_acked; 4166 4167 ifmgd->status_received = false; 4168 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4169 if (status_acked) { 4170 if (ifmgd->auth_data->algorithm == 4171 WLAN_AUTH_SAE) 4172 ifmgd->auth_data->timeout = 4173 jiffies + 4174 IEEE80211_AUTH_TIMEOUT_SAE; 4175 else 4176 ifmgd->auth_data->timeout = 4177 jiffies + 4178 IEEE80211_AUTH_TIMEOUT_SHORT; 4179 run_again(sdata, ifmgd->auth_data->timeout); 4180 } else { 4181 ifmgd->auth_data->timeout = jiffies - 1; 4182 } 4183 ifmgd->auth_data->timeout_started = true; 4184 } else if (ifmgd->assoc_data && 4185 (ieee80211_is_assoc_req(fc) || 4186 ieee80211_is_reassoc_req(fc))) { 4187 if (status_acked) { 4188 ifmgd->assoc_data->timeout = 4189 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4190 run_again(sdata, ifmgd->assoc_data->timeout); 4191 } else { 4192 ifmgd->assoc_data->timeout = jiffies - 1; 4193 } 4194 ifmgd->assoc_data->timeout_started = true; 4195 } 4196 } 4197 4198 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4199 time_after(jiffies, ifmgd->auth_data->timeout)) { 4200 if (ifmgd->auth_data->done) { 4201 /* 4202 * ok ... we waited for assoc but userspace didn't, 4203 * so let's just kill the auth data 4204 */ 4205 ieee80211_destroy_auth_data(sdata, false); 4206 } else if (ieee80211_auth(sdata)) { 4207 u8 bssid[ETH_ALEN]; 4208 struct ieee80211_event event = { 4209 .type = MLME_EVENT, 4210 .u.mlme.data = AUTH_EVENT, 4211 .u.mlme.status = MLME_TIMEOUT, 4212 }; 4213 4214 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4215 4216 ieee80211_destroy_auth_data(sdata, false); 4217 4218 cfg80211_auth_timeout(sdata->dev, bssid); 4219 drv_event_callback(sdata->local, sdata, &event); 4220 } 4221 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4222 run_again(sdata, ifmgd->auth_data->timeout); 4223 4224 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4225 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4226 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4227 ieee80211_do_assoc(sdata)) { 4228 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4229 struct ieee80211_event event = { 4230 .type = MLME_EVENT, 4231 .u.mlme.data = ASSOC_EVENT, 4232 .u.mlme.status = MLME_TIMEOUT, 4233 }; 4234 4235 ieee80211_destroy_assoc_data(sdata, false, false); 4236 cfg80211_assoc_timeout(sdata->dev, bss); 4237 drv_event_callback(sdata->local, sdata, &event); 4238 } 4239 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4240 run_again(sdata, ifmgd->assoc_data->timeout); 4241 4242 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4243 ifmgd->associated) { 4244 u8 bssid[ETH_ALEN]; 4245 int max_tries; 4246 4247 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4248 4249 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4250 max_tries = max_nullfunc_tries; 4251 else 4252 max_tries = max_probe_tries; 4253 4254 /* ACK received for nullfunc probing frame */ 4255 if (!ifmgd->probe_send_count) 4256 ieee80211_reset_ap_probe(sdata); 4257 else if (ifmgd->nullfunc_failed) { 4258 if (ifmgd->probe_send_count < max_tries) { 4259 mlme_dbg(sdata, 4260 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4261 bssid, ifmgd->probe_send_count, 4262 max_tries); 4263 ieee80211_mgd_probe_ap_send(sdata); 4264 } else { 4265 mlme_dbg(sdata, 4266 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4267 bssid); 4268 ieee80211_sta_connection_lost(sdata, bssid, 4269 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4270 false); 4271 } 4272 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4273 run_again(sdata, ifmgd->probe_timeout); 4274 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4275 mlme_dbg(sdata, 4276 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4277 bssid, probe_wait_ms); 4278 ieee80211_sta_connection_lost(sdata, bssid, 4279 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4280 } else if (ifmgd->probe_send_count < max_tries) { 4281 mlme_dbg(sdata, 4282 "No probe response from AP %pM after %dms, try %d/%i\n", 4283 bssid, probe_wait_ms, 4284 ifmgd->probe_send_count, max_tries); 4285 ieee80211_mgd_probe_ap_send(sdata); 4286 } else { 4287 /* 4288 * We actually lost the connection ... or did we? 4289 * Let's make sure! 4290 */ 4291 mlme_dbg(sdata, 4292 "No probe response from AP %pM after %dms, disconnecting.\n", 4293 bssid, probe_wait_ms); 4294 4295 ieee80211_sta_connection_lost(sdata, bssid, 4296 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4297 } 4298 } 4299 4300 sdata_unlock(sdata); 4301 } 4302 4303 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4304 { 4305 struct ieee80211_sub_if_data *sdata = 4306 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4308 4309 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4310 return; 4311 4312 sdata->u.mgd.connection_loss = false; 4313 ieee80211_queue_work(&sdata->local->hw, 4314 &sdata->u.mgd.beacon_connection_loss_work); 4315 } 4316 4317 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4318 { 4319 struct ieee80211_sub_if_data *sdata = 4320 from_timer(sdata, t, u.mgd.conn_mon_timer); 4321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4322 struct ieee80211_local *local = sdata->local; 4323 4324 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4325 return; 4326 4327 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4328 } 4329 4330 static void ieee80211_sta_monitor_work(struct work_struct *work) 4331 { 4332 struct ieee80211_sub_if_data *sdata = 4333 container_of(work, struct ieee80211_sub_if_data, 4334 u.mgd.monitor_work); 4335 4336 ieee80211_mgd_probe_ap(sdata, false); 4337 } 4338 4339 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4340 { 4341 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4342 __ieee80211_stop_poll(sdata); 4343 4344 /* let's probe the connection once */ 4345 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4346 ieee80211_queue_work(&sdata->local->hw, 4347 &sdata->u.mgd.monitor_work); 4348 } 4349 } 4350 4351 #ifdef CONFIG_PM 4352 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4353 { 4354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4355 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4356 4357 sdata_lock(sdata); 4358 4359 if (ifmgd->auth_data || ifmgd->assoc_data) { 4360 const u8 *bssid = ifmgd->auth_data ? 4361 ifmgd->auth_data->bss->bssid : 4362 ifmgd->assoc_data->bss->bssid; 4363 4364 /* 4365 * If we are trying to authenticate / associate while suspending, 4366 * cfg80211 won't know and won't actually abort those attempts, 4367 * thus we need to do that ourselves. 4368 */ 4369 ieee80211_send_deauth_disassoc(sdata, bssid, 4370 IEEE80211_STYPE_DEAUTH, 4371 WLAN_REASON_DEAUTH_LEAVING, 4372 false, frame_buf); 4373 if (ifmgd->assoc_data) 4374 ieee80211_destroy_assoc_data(sdata, false, true); 4375 if (ifmgd->auth_data) 4376 ieee80211_destroy_auth_data(sdata, false); 4377 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4378 IEEE80211_DEAUTH_FRAME_LEN); 4379 } 4380 4381 /* This is a bit of a hack - we should find a better and more generic 4382 * solution to this. Normally when suspending, cfg80211 will in fact 4383 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4384 * auth (not so important) or assoc (this is the problem) process. 4385 * 4386 * As a consequence, it can happen that we are in the process of both 4387 * associating and suspending, and receive an association response 4388 * after cfg80211 has checked if it needs to disconnect, but before 4389 * we actually set the flag to drop incoming frames. This will then 4390 * cause the workqueue flush to process the association response in 4391 * the suspend, resulting in a successful association just before it 4392 * tries to remove the interface from the driver, which now though 4393 * has a channel context assigned ... this results in issues. 4394 * 4395 * To work around this (for now) simply deauth here again if we're 4396 * now connected. 4397 */ 4398 if (ifmgd->associated && !sdata->local->wowlan) { 4399 u8 bssid[ETH_ALEN]; 4400 struct cfg80211_deauth_request req = { 4401 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4402 .bssid = bssid, 4403 }; 4404 4405 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4406 ieee80211_mgd_deauth(sdata, &req); 4407 } 4408 4409 sdata_unlock(sdata); 4410 } 4411 4412 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4413 { 4414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4415 4416 sdata_lock(sdata); 4417 if (!ifmgd->associated) { 4418 sdata_unlock(sdata); 4419 return; 4420 } 4421 4422 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4423 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4424 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4425 ieee80211_sta_connection_lost(sdata, 4426 ifmgd->associated->bssid, 4427 WLAN_REASON_UNSPECIFIED, 4428 true); 4429 sdata_unlock(sdata); 4430 return; 4431 } 4432 sdata_unlock(sdata); 4433 } 4434 #endif 4435 4436 /* interface setup */ 4437 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4438 { 4439 struct ieee80211_if_managed *ifmgd; 4440 4441 ifmgd = &sdata->u.mgd; 4442 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4443 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4444 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4445 ieee80211_beacon_connection_loss_work); 4446 INIT_WORK(&ifmgd->csa_connection_drop_work, 4447 ieee80211_csa_connection_drop_work); 4448 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4449 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4450 ieee80211_tdls_peer_del_work); 4451 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4452 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4453 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4454 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4455 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4456 ieee80211_sta_handle_tspec_ac_params_wk); 4457 4458 ifmgd->flags = 0; 4459 ifmgd->powersave = sdata->wdev.ps; 4460 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4461 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4462 ifmgd->p2p_noa_index = -1; 4463 4464 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4465 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4466 else 4467 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4468 4469 /* Setup TDLS data */ 4470 spin_lock_init(&ifmgd->teardown_lock); 4471 ifmgd->teardown_skb = NULL; 4472 ifmgd->orig_teardown_skb = NULL; 4473 } 4474 4475 /* scan finished notification */ 4476 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4477 { 4478 struct ieee80211_sub_if_data *sdata; 4479 4480 /* Restart STA timers */ 4481 rcu_read_lock(); 4482 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4483 if (ieee80211_sdata_running(sdata)) 4484 ieee80211_restart_sta_timer(sdata); 4485 } 4486 rcu_read_unlock(); 4487 } 4488 4489 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4490 struct cfg80211_bss *cbss) 4491 { 4492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4493 const u8 *ht_cap_ie, *vht_cap_ie; 4494 const struct ieee80211_ht_cap *ht_cap; 4495 const struct ieee80211_vht_cap *vht_cap; 4496 u8 chains = 1; 4497 4498 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4499 return chains; 4500 4501 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4502 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4503 ht_cap = (void *)(ht_cap_ie + 2); 4504 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4505 /* 4506 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4507 * "Tx Unequal Modulation Supported" fields. 4508 */ 4509 } 4510 4511 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4512 return chains; 4513 4514 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4515 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4516 u8 nss; 4517 u16 tx_mcs_map; 4518 4519 vht_cap = (void *)(vht_cap_ie + 2); 4520 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4521 for (nss = 8; nss > 0; nss--) { 4522 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4523 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4524 break; 4525 } 4526 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4527 chains = max(chains, nss); 4528 } 4529 4530 return chains; 4531 } 4532 4533 static bool 4534 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4535 const struct ieee80211_he_operation *he_op) 4536 { 4537 const struct ieee80211_sta_he_cap *sta_he_cap = 4538 ieee80211_get_he_sta_cap(sband); 4539 u16 ap_min_req_set; 4540 int i; 4541 4542 if (!sta_he_cap || !he_op) 4543 return false; 4544 4545 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4546 4547 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4548 for (i = 0; i < 3; i++) { 4549 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4550 &sta_he_cap->he_mcs_nss_supp; 4551 u16 sta_mcs_map_rx = 4552 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4553 u16 sta_mcs_map_tx = 4554 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4555 u8 nss; 4556 bool verified = true; 4557 4558 /* 4559 * For each band there is a maximum of 8 spatial streams 4560 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4561 * of 2 bits per NSS (1-8), with the values defined in enum 4562 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4563 * capabilities aren't less than the AP's minimum requirements 4564 * for this HE BSS per SS. 4565 * It is enough to find one such band that meets the reqs. 4566 */ 4567 for (nss = 8; nss > 0; nss--) { 4568 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4569 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4570 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4571 4572 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4573 continue; 4574 4575 /* 4576 * Make sure the HE AP doesn't require MCSs that aren't 4577 * supported by the client 4578 */ 4579 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4580 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4581 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4582 verified = false; 4583 break; 4584 } 4585 } 4586 4587 if (verified) 4588 return true; 4589 } 4590 4591 /* If here, STA doesn't meet AP's HE min requirements */ 4592 return false; 4593 } 4594 4595 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4596 struct cfg80211_bss *cbss) 4597 { 4598 struct ieee80211_local *local = sdata->local; 4599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4600 const struct ieee80211_ht_cap *ht_cap = NULL; 4601 const struct ieee80211_ht_operation *ht_oper = NULL; 4602 const struct ieee80211_vht_operation *vht_oper = NULL; 4603 const struct ieee80211_he_operation *he_oper = NULL; 4604 struct ieee80211_supported_band *sband; 4605 struct cfg80211_chan_def chandef; 4606 int ret; 4607 u32 i; 4608 bool have_80mhz; 4609 4610 sband = local->hw.wiphy->bands[cbss->channel->band]; 4611 4612 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4613 IEEE80211_STA_DISABLE_80P80MHZ | 4614 IEEE80211_STA_DISABLE_160MHZ); 4615 4616 rcu_read_lock(); 4617 4618 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4619 sband->ht_cap.ht_supported) { 4620 const u8 *ht_oper_ie, *ht_cap_ie; 4621 4622 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4623 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4624 ht_oper = (void *)(ht_oper_ie + 2); 4625 4626 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4627 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4628 ht_cap = (void *)(ht_cap_ie + 2); 4629 4630 if (!ht_cap) { 4631 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4632 ht_oper = NULL; 4633 } 4634 } 4635 4636 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4637 sband->vht_cap.vht_supported) { 4638 const u8 *vht_oper_ie, *vht_cap; 4639 4640 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4641 WLAN_EID_VHT_OPERATION); 4642 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4643 vht_oper = (void *)(vht_oper_ie + 2); 4644 if (vht_oper && !ht_oper) { 4645 vht_oper = NULL; 4646 sdata_info(sdata, 4647 "AP advertised VHT without HT, disabling both\n"); 4648 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4649 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4650 } 4651 4652 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4653 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4654 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4655 vht_oper = NULL; 4656 } 4657 } 4658 4659 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 4660 ieee80211_get_he_sta_cap(sband)) { 4661 const struct cfg80211_bss_ies *ies; 4662 const u8 *he_oper_ie; 4663 4664 ies = rcu_dereference(cbss->ies); 4665 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4666 ies->data, ies->len); 4667 if (he_oper_ie && 4668 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4669 he_oper = (void *)(he_oper_ie + 3); 4670 else 4671 he_oper = NULL; 4672 4673 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4674 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4675 } 4676 4677 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4678 have_80mhz = false; 4679 for (i = 0; i < sband->n_channels; i++) { 4680 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4681 IEEE80211_CHAN_NO_80MHZ)) 4682 continue; 4683 4684 have_80mhz = true; 4685 break; 4686 } 4687 4688 if (!have_80mhz) 4689 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4690 4691 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4692 cbss->channel, 4693 ht_oper, vht_oper, he_oper, 4694 &chandef, false); 4695 4696 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4697 local->rx_chains); 4698 4699 rcu_read_unlock(); 4700 4701 /* will change later if needed */ 4702 sdata->smps_mode = IEEE80211_SMPS_OFF; 4703 4704 mutex_lock(&local->mtx); 4705 /* 4706 * If this fails (possibly due to channel context sharing 4707 * on incompatible channels, e.g. 80+80 and 160 sharing the 4708 * same control channel) try to use a smaller bandwidth. 4709 */ 4710 ret = ieee80211_vif_use_channel(sdata, &chandef, 4711 IEEE80211_CHANCTX_SHARED); 4712 4713 /* don't downgrade for 5 and 10 MHz channels, though. */ 4714 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4715 chandef.width == NL80211_CHAN_WIDTH_10) 4716 goto out; 4717 4718 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4719 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4720 ret = ieee80211_vif_use_channel(sdata, &chandef, 4721 IEEE80211_CHANCTX_SHARED); 4722 } 4723 out: 4724 mutex_unlock(&local->mtx); 4725 return ret; 4726 } 4727 4728 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4729 struct cfg80211_bss *cbss, bool assoc, 4730 bool override) 4731 { 4732 struct ieee80211_local *local = sdata->local; 4733 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4734 struct ieee80211_bss *bss = (void *)cbss->priv; 4735 struct sta_info *new_sta = NULL; 4736 struct ieee80211_supported_band *sband; 4737 bool have_sta = false; 4738 int err; 4739 4740 sband = local->hw.wiphy->bands[cbss->channel->band]; 4741 4742 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4743 return -EINVAL; 4744 4745 /* If a reconfig is happening, bail out */ 4746 if (local->in_reconfig) 4747 return -EBUSY; 4748 4749 if (assoc) { 4750 rcu_read_lock(); 4751 have_sta = sta_info_get(sdata, cbss->bssid); 4752 rcu_read_unlock(); 4753 } 4754 4755 if (!have_sta) { 4756 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4757 if (!new_sta) 4758 return -ENOMEM; 4759 } 4760 4761 /* 4762 * Set up the information for the new channel before setting the 4763 * new channel. We can't - completely race-free - change the basic 4764 * rates bitmap and the channel (sband) that it refers to, but if 4765 * we set it up before we at least avoid calling into the driver's 4766 * bss_info_changed() method with invalid information (since we do 4767 * call that from changing the channel - only for IDLE and perhaps 4768 * some others, but ...). 4769 * 4770 * So to avoid that, just set up all the new information before the 4771 * channel, but tell the driver to apply it only afterwards, since 4772 * it might need the new channel for that. 4773 */ 4774 if (new_sta) { 4775 u32 rates = 0, basic_rates = 0; 4776 bool have_higher_than_11mbit; 4777 int min_rate = INT_MAX, min_rate_index = -1; 4778 const struct cfg80211_bss_ies *ies; 4779 int shift = ieee80211_vif_get_shift(&sdata->vif); 4780 4781 ieee80211_get_rates(sband, bss->supp_rates, 4782 bss->supp_rates_len, 4783 &rates, &basic_rates, 4784 &have_higher_than_11mbit, 4785 &min_rate, &min_rate_index, 4786 shift); 4787 4788 /* 4789 * This used to be a workaround for basic rates missing 4790 * in the association response frame. Now that we no 4791 * longer use the basic rates from there, it probably 4792 * doesn't happen any more, but keep the workaround so 4793 * in case some *other* APs are buggy in different ways 4794 * we can connect -- with a warning. 4795 */ 4796 if (!basic_rates && min_rate_index >= 0) { 4797 sdata_info(sdata, 4798 "No basic rates, using min rate instead\n"); 4799 basic_rates = BIT(min_rate_index); 4800 } 4801 4802 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4803 sdata->vif.bss_conf.basic_rates = basic_rates; 4804 4805 /* cf. IEEE 802.11 9.2.12 */ 4806 if (cbss->channel->band == NL80211_BAND_2GHZ && 4807 have_higher_than_11mbit) 4808 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4809 else 4810 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4811 4812 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4813 4814 /* set timing information */ 4815 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4816 rcu_read_lock(); 4817 ies = rcu_dereference(cbss->beacon_ies); 4818 if (ies) { 4819 const u8 *tim_ie; 4820 4821 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4822 sdata->vif.bss_conf.sync_device_ts = 4823 bss->device_ts_beacon; 4824 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4825 ies->data, ies->len); 4826 if (tim_ie && tim_ie[1] >= 2) 4827 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4828 else 4829 sdata->vif.bss_conf.sync_dtim_count = 0; 4830 } else if (!ieee80211_hw_check(&sdata->local->hw, 4831 TIMING_BEACON_ONLY)) { 4832 ies = rcu_dereference(cbss->proberesp_ies); 4833 /* must be non-NULL since beacon IEs were NULL */ 4834 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4835 sdata->vif.bss_conf.sync_device_ts = 4836 bss->device_ts_presp; 4837 sdata->vif.bss_conf.sync_dtim_count = 0; 4838 } else { 4839 sdata->vif.bss_conf.sync_tsf = 0; 4840 sdata->vif.bss_conf.sync_device_ts = 0; 4841 sdata->vif.bss_conf.sync_dtim_count = 0; 4842 } 4843 rcu_read_unlock(); 4844 } 4845 4846 if (new_sta || override) { 4847 err = ieee80211_prep_channel(sdata, cbss); 4848 if (err) { 4849 if (new_sta) 4850 sta_info_free(local, new_sta); 4851 return -EINVAL; 4852 } 4853 } 4854 4855 if (new_sta) { 4856 /* 4857 * tell driver about BSSID, basic rates and timing 4858 * this was set up above, before setting the channel 4859 */ 4860 ieee80211_bss_info_change_notify(sdata, 4861 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4862 BSS_CHANGED_BEACON_INT); 4863 4864 if (assoc) 4865 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4866 4867 err = sta_info_insert(new_sta); 4868 new_sta = NULL; 4869 if (err) { 4870 sdata_info(sdata, 4871 "failed to insert STA entry for the AP (error %d)\n", 4872 err); 4873 return err; 4874 } 4875 } else 4876 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4877 4878 /* Cancel scan to ensure that nothing interferes with connection */ 4879 if (local->scanning) 4880 ieee80211_scan_cancel(local); 4881 4882 return 0; 4883 } 4884 4885 /* config hooks */ 4886 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4887 struct cfg80211_auth_request *req) 4888 { 4889 struct ieee80211_local *local = sdata->local; 4890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4891 struct ieee80211_mgd_auth_data *auth_data; 4892 u16 auth_alg; 4893 int err; 4894 bool cont_auth; 4895 4896 /* prepare auth data structure */ 4897 4898 switch (req->auth_type) { 4899 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4900 auth_alg = WLAN_AUTH_OPEN; 4901 break; 4902 case NL80211_AUTHTYPE_SHARED_KEY: 4903 if (IS_ERR(local->wep_tx_tfm)) 4904 return -EOPNOTSUPP; 4905 auth_alg = WLAN_AUTH_SHARED_KEY; 4906 break; 4907 case NL80211_AUTHTYPE_FT: 4908 auth_alg = WLAN_AUTH_FT; 4909 break; 4910 case NL80211_AUTHTYPE_NETWORK_EAP: 4911 auth_alg = WLAN_AUTH_LEAP; 4912 break; 4913 case NL80211_AUTHTYPE_SAE: 4914 auth_alg = WLAN_AUTH_SAE; 4915 break; 4916 case NL80211_AUTHTYPE_FILS_SK: 4917 auth_alg = WLAN_AUTH_FILS_SK; 4918 break; 4919 case NL80211_AUTHTYPE_FILS_SK_PFS: 4920 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4921 break; 4922 case NL80211_AUTHTYPE_FILS_PK: 4923 auth_alg = WLAN_AUTH_FILS_PK; 4924 break; 4925 default: 4926 return -EOPNOTSUPP; 4927 } 4928 4929 if (ifmgd->assoc_data) 4930 return -EBUSY; 4931 4932 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4933 req->ie_len, GFP_KERNEL); 4934 if (!auth_data) 4935 return -ENOMEM; 4936 4937 auth_data->bss = req->bss; 4938 4939 if (req->auth_data_len >= 4) { 4940 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4941 __le16 *pos = (__le16 *) req->auth_data; 4942 4943 auth_data->sae_trans = le16_to_cpu(pos[0]); 4944 auth_data->sae_status = le16_to_cpu(pos[1]); 4945 } 4946 memcpy(auth_data->data, req->auth_data + 4, 4947 req->auth_data_len - 4); 4948 auth_data->data_len += req->auth_data_len - 4; 4949 } 4950 4951 /* Check if continuing authentication or trying to authenticate with the 4952 * same BSS that we were in the process of authenticating with and avoid 4953 * removal and re-addition of the STA entry in 4954 * ieee80211_prep_connection(). 4955 */ 4956 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 4957 4958 if (req->ie && req->ie_len) { 4959 memcpy(&auth_data->data[auth_data->data_len], 4960 req->ie, req->ie_len); 4961 auth_data->data_len += req->ie_len; 4962 } 4963 4964 if (req->key && req->key_len) { 4965 auth_data->key_len = req->key_len; 4966 auth_data->key_idx = req->key_idx; 4967 memcpy(auth_data->key, req->key, req->key_len); 4968 } 4969 4970 auth_data->algorithm = auth_alg; 4971 4972 /* try to authenticate/probe */ 4973 4974 if (ifmgd->auth_data) { 4975 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 4976 auth_data->peer_confirmed = 4977 ifmgd->auth_data->peer_confirmed; 4978 } 4979 ieee80211_destroy_auth_data(sdata, cont_auth); 4980 } 4981 4982 /* prep auth_data so we don't go into idle on disassoc */ 4983 ifmgd->auth_data = auth_data; 4984 4985 /* If this is continuation of an ongoing SAE authentication exchange 4986 * (i.e., request to send SAE Confirm) and the peer has already 4987 * confirmed, mark authentication completed since we are about to send 4988 * out SAE Confirm. 4989 */ 4990 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 4991 auth_data->peer_confirmed && auth_data->sae_trans == 2) 4992 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 4993 4994 if (ifmgd->associated) { 4995 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4996 4997 sdata_info(sdata, 4998 "disconnect from AP %pM for new auth to %pM\n", 4999 ifmgd->associated->bssid, req->bss->bssid); 5000 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5001 WLAN_REASON_UNSPECIFIED, 5002 false, frame_buf); 5003 5004 ieee80211_report_disconnect(sdata, frame_buf, 5005 sizeof(frame_buf), true, 5006 WLAN_REASON_UNSPECIFIED); 5007 } 5008 5009 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5010 5011 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5012 if (err) 5013 goto err_clear; 5014 5015 err = ieee80211_auth(sdata); 5016 if (err) { 5017 sta_info_destroy_addr(sdata, req->bss->bssid); 5018 goto err_clear; 5019 } 5020 5021 /* hold our own reference */ 5022 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5023 return 0; 5024 5025 err_clear: 5026 eth_zero_addr(ifmgd->bssid); 5027 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5028 ifmgd->auth_data = NULL; 5029 mutex_lock(&sdata->local->mtx); 5030 ieee80211_vif_release_channel(sdata); 5031 mutex_unlock(&sdata->local->mtx); 5032 kfree(auth_data); 5033 return err; 5034 } 5035 5036 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5037 struct cfg80211_assoc_request *req) 5038 { 5039 struct ieee80211_local *local = sdata->local; 5040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5041 struct ieee80211_bss *bss = (void *)req->bss->priv; 5042 struct ieee80211_mgd_assoc_data *assoc_data; 5043 const struct cfg80211_bss_ies *beacon_ies; 5044 struct ieee80211_supported_band *sband; 5045 const u8 *ssidie, *ht_ie, *vht_ie; 5046 int i, err; 5047 bool override = false; 5048 5049 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5050 if (!assoc_data) 5051 return -ENOMEM; 5052 5053 rcu_read_lock(); 5054 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5055 if (!ssidie) { 5056 rcu_read_unlock(); 5057 kfree(assoc_data); 5058 return -EINVAL; 5059 } 5060 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5061 assoc_data->ssid_len = ssidie[1]; 5062 rcu_read_unlock(); 5063 5064 if (ifmgd->associated) { 5065 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5066 5067 sdata_info(sdata, 5068 "disconnect from AP %pM for new assoc to %pM\n", 5069 ifmgd->associated->bssid, req->bss->bssid); 5070 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5071 WLAN_REASON_UNSPECIFIED, 5072 false, frame_buf); 5073 5074 ieee80211_report_disconnect(sdata, frame_buf, 5075 sizeof(frame_buf), true, 5076 WLAN_REASON_UNSPECIFIED); 5077 } 5078 5079 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5080 err = -EBUSY; 5081 goto err_free; 5082 } 5083 5084 if (ifmgd->assoc_data) { 5085 err = -EBUSY; 5086 goto err_free; 5087 } 5088 5089 if (ifmgd->auth_data) { 5090 bool match; 5091 5092 /* keep sta info, bssid if matching */ 5093 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5094 ieee80211_destroy_auth_data(sdata, match); 5095 } 5096 5097 /* prepare assoc data */ 5098 5099 ifmgd->beacon_crc_valid = false; 5100 5101 assoc_data->wmm = bss->wmm_used && 5102 (local->hw.queues >= IEEE80211_NUM_ACS); 5103 5104 /* 5105 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5106 * We still associate in non-HT mode (11a/b/g) if any one of these 5107 * ciphers is configured as pairwise. 5108 * We can set this to true for non-11n hardware, that'll be checked 5109 * separately along with the peer capabilities. 5110 */ 5111 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5112 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5113 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5114 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5115 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5116 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5117 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5118 netdev_info(sdata->dev, 5119 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5120 } 5121 } 5122 5123 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5124 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5125 if (!sband->ht_cap.ht_supported || 5126 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5127 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5128 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5129 if (!bss->wmm_used && 5130 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5131 netdev_info(sdata->dev, 5132 "disabling HT as WMM/QoS is not supported by the AP\n"); 5133 } 5134 5135 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5136 if (!sband->vht_cap.vht_supported || 5137 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5138 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5139 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5140 if (!bss->wmm_used && 5141 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5142 netdev_info(sdata->dev, 5143 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5144 } 5145 5146 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5147 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5148 sizeof(ifmgd->ht_capa_mask)); 5149 5150 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5151 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5152 sizeof(ifmgd->vht_capa_mask)); 5153 5154 if (req->ie && req->ie_len) { 5155 memcpy(assoc_data->ie, req->ie, req->ie_len); 5156 assoc_data->ie_len = req->ie_len; 5157 } 5158 5159 if (req->fils_kek) { 5160 /* should already be checked in cfg80211 - so warn */ 5161 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5162 err = -EINVAL; 5163 goto err_free; 5164 } 5165 memcpy(assoc_data->fils_kek, req->fils_kek, 5166 req->fils_kek_len); 5167 assoc_data->fils_kek_len = req->fils_kek_len; 5168 } 5169 5170 if (req->fils_nonces) 5171 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5172 2 * FILS_NONCE_LEN); 5173 5174 assoc_data->bss = req->bss; 5175 5176 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5177 if (ifmgd->powersave) 5178 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5179 else 5180 sdata->smps_mode = IEEE80211_SMPS_OFF; 5181 } else 5182 sdata->smps_mode = ifmgd->req_smps; 5183 5184 assoc_data->capability = req->bss->capability; 5185 assoc_data->supp_rates = bss->supp_rates; 5186 assoc_data->supp_rates_len = bss->supp_rates_len; 5187 5188 rcu_read_lock(); 5189 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5190 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5191 assoc_data->ap_ht_param = 5192 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5193 else 5194 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5195 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5196 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5197 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5198 sizeof(struct ieee80211_vht_cap)); 5199 else 5200 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5201 rcu_read_unlock(); 5202 5203 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5204 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5205 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5206 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5207 5208 if (bss->wmm_used && bss->uapsd_supported && 5209 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5210 assoc_data->uapsd = true; 5211 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5212 } else { 5213 assoc_data->uapsd = false; 5214 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5215 } 5216 5217 if (req->prev_bssid) 5218 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5219 5220 if (req->use_mfp) { 5221 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5222 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5223 } else { 5224 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5225 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5226 } 5227 5228 if (req->flags & ASSOC_REQ_USE_RRM) 5229 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5230 else 5231 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5232 5233 if (req->crypto.control_port) 5234 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5235 else 5236 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5237 5238 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5239 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5240 sdata->control_port_over_nl80211 = 5241 req->crypto.control_port_over_nl80211; 5242 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5243 sdata->vif.type); 5244 5245 /* kick off associate process */ 5246 5247 ifmgd->assoc_data = assoc_data; 5248 ifmgd->dtim_period = 0; 5249 ifmgd->have_beacon = false; 5250 5251 /* override HT/VHT configuration only if the AP and we support it */ 5252 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5253 struct ieee80211_sta_ht_cap sta_ht_cap; 5254 5255 if (req->flags & ASSOC_REQ_DISABLE_HT) 5256 override = true; 5257 5258 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5259 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5260 5261 /* check for 40 MHz disable override */ 5262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5263 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5264 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5265 override = true; 5266 5267 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5268 req->flags & ASSOC_REQ_DISABLE_VHT) 5269 override = true; 5270 } 5271 5272 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5273 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5274 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5275 } 5276 5277 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5278 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5279 5280 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5281 if (err) 5282 goto err_clear; 5283 5284 rcu_read_lock(); 5285 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5286 5287 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5288 !beacon_ies) { 5289 /* 5290 * Wait up to one beacon interval ... 5291 * should this be more if we miss one? 5292 */ 5293 sdata_info(sdata, "waiting for beacon from %pM\n", 5294 ifmgd->bssid); 5295 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5296 assoc_data->timeout_started = true; 5297 assoc_data->need_beacon = true; 5298 } else if (beacon_ies) { 5299 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 5300 beacon_ies->data, 5301 beacon_ies->len); 5302 u8 dtim_count = 0; 5303 5304 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 5305 const struct ieee80211_tim_ie *tim; 5306 tim = (void *)(tim_ie + 2); 5307 ifmgd->dtim_period = tim->dtim_period; 5308 dtim_count = tim->dtim_count; 5309 } 5310 ifmgd->have_beacon = true; 5311 assoc_data->timeout = jiffies; 5312 assoc_data->timeout_started = true; 5313 5314 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5315 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5316 sdata->vif.bss_conf.sync_device_ts = 5317 bss->device_ts_beacon; 5318 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5319 } 5320 } else { 5321 assoc_data->timeout = jiffies; 5322 assoc_data->timeout_started = true; 5323 } 5324 rcu_read_unlock(); 5325 5326 run_again(sdata, assoc_data->timeout); 5327 5328 if (bss->corrupt_data) { 5329 char *corrupt_type = "data"; 5330 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5331 if (bss->corrupt_data & 5332 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5333 corrupt_type = "beacon and probe response"; 5334 else 5335 corrupt_type = "beacon"; 5336 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5337 corrupt_type = "probe response"; 5338 sdata_info(sdata, "associating with AP with corrupt %s\n", 5339 corrupt_type); 5340 } 5341 5342 return 0; 5343 err_clear: 5344 eth_zero_addr(ifmgd->bssid); 5345 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5346 ifmgd->assoc_data = NULL; 5347 err_free: 5348 kfree(assoc_data); 5349 return err; 5350 } 5351 5352 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5353 struct cfg80211_deauth_request *req) 5354 { 5355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5356 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5357 bool tx = !req->local_state_change; 5358 5359 if (ifmgd->auth_data && 5360 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5361 sdata_info(sdata, 5362 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5363 req->bssid, req->reason_code, 5364 ieee80211_get_reason_code_string(req->reason_code)); 5365 5366 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5367 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5368 IEEE80211_STYPE_DEAUTH, 5369 req->reason_code, tx, 5370 frame_buf); 5371 ieee80211_destroy_auth_data(sdata, false); 5372 ieee80211_report_disconnect(sdata, frame_buf, 5373 sizeof(frame_buf), true, 5374 req->reason_code); 5375 5376 return 0; 5377 } 5378 5379 if (ifmgd->assoc_data && 5380 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5381 sdata_info(sdata, 5382 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5383 req->bssid, req->reason_code, 5384 ieee80211_get_reason_code_string(req->reason_code)); 5385 5386 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5387 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5388 IEEE80211_STYPE_DEAUTH, 5389 req->reason_code, tx, 5390 frame_buf); 5391 ieee80211_destroy_assoc_data(sdata, false, true); 5392 ieee80211_report_disconnect(sdata, frame_buf, 5393 sizeof(frame_buf), true, 5394 req->reason_code); 5395 return 0; 5396 } 5397 5398 if (ifmgd->associated && 5399 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5400 sdata_info(sdata, 5401 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5402 req->bssid, req->reason_code, 5403 ieee80211_get_reason_code_string(req->reason_code)); 5404 5405 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5406 req->reason_code, tx, frame_buf); 5407 ieee80211_report_disconnect(sdata, frame_buf, 5408 sizeof(frame_buf), true, 5409 req->reason_code); 5410 return 0; 5411 } 5412 5413 return -ENOTCONN; 5414 } 5415 5416 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5417 struct cfg80211_disassoc_request *req) 5418 { 5419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5420 u8 bssid[ETH_ALEN]; 5421 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5422 5423 /* 5424 * cfg80211 should catch this ... but it's racy since 5425 * we can receive a disassoc frame, process it, hand it 5426 * to cfg80211 while that's in a locked section already 5427 * trying to tell us that the user wants to disconnect. 5428 */ 5429 if (ifmgd->associated != req->bss) 5430 return -ENOLINK; 5431 5432 sdata_info(sdata, 5433 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5434 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5435 5436 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5437 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5438 req->reason_code, !req->local_state_change, 5439 frame_buf); 5440 5441 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5442 req->reason_code); 5443 5444 return 0; 5445 } 5446 5447 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5448 { 5449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5450 5451 /* 5452 * Make sure some work items will not run after this, 5453 * they will not do anything but might not have been 5454 * cancelled when disconnecting. 5455 */ 5456 cancel_work_sync(&ifmgd->monitor_work); 5457 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5458 cancel_work_sync(&ifmgd->request_smps_work); 5459 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5460 cancel_work_sync(&ifmgd->chswitch_work); 5461 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5462 5463 sdata_lock(sdata); 5464 if (ifmgd->assoc_data) { 5465 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5466 ieee80211_destroy_assoc_data(sdata, false, false); 5467 cfg80211_assoc_timeout(sdata->dev, bss); 5468 } 5469 if (ifmgd->auth_data) 5470 ieee80211_destroy_auth_data(sdata, false); 5471 spin_lock_bh(&ifmgd->teardown_lock); 5472 if (ifmgd->teardown_skb) { 5473 kfree_skb(ifmgd->teardown_skb); 5474 ifmgd->teardown_skb = NULL; 5475 ifmgd->orig_teardown_skb = NULL; 5476 } 5477 spin_unlock_bh(&ifmgd->teardown_lock); 5478 del_timer_sync(&ifmgd->timer); 5479 sdata_unlock(sdata); 5480 } 5481 5482 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5483 enum nl80211_cqm_rssi_threshold_event rssi_event, 5484 s32 rssi_level, 5485 gfp_t gfp) 5486 { 5487 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5488 5489 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5490 5491 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5492 } 5493 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5494 5495 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5496 { 5497 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5498 5499 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5500 5501 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5502 } 5503 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5504