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