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