1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 10 * Copyright (C) 2018 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/delay.h> 18 #include <linux/if_ether.h> 19 #include <linux/skbuff.h> 20 #include <linux/if_arp.h> 21 #include <linux/etherdevice.h> 22 #include <linux/moduleparam.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/crc32.h> 25 #include <linux/slab.h> 26 #include <linux/export.h> 27 #include <net/mac80211.h> 28 #include <asm/unaligned.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "led.h" 34 #include "fils_aead.h" 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 43 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 44 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 45 #define IEEE80211_ASSOC_MAX_TRIES 3 46 47 static int max_nullfunc_tries = 2; 48 module_param(max_nullfunc_tries, int, 0644); 49 MODULE_PARM_DESC(max_nullfunc_tries, 50 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 51 52 static int max_probe_tries = 5; 53 module_param(max_probe_tries, int, 0644); 54 MODULE_PARM_DESC(max_probe_tries, 55 "Maximum probe tries before disconnecting (reason 4)."); 56 57 /* 58 * Beacon loss timeout is calculated as N frames times the 59 * advertised beacon interval. This may need to be somewhat 60 * higher than what hardware might detect to account for 61 * delays in the host processing frames. But since we also 62 * probe on beacon miss before declaring the connection lost 63 * default to what we want. 64 */ 65 static int beacon_loss_count = 7; 66 module_param(beacon_loss_count, int, 0644); 67 MODULE_PARM_DESC(beacon_loss_count, 68 "Number of beacon intervals before we decide beacon was lost."); 69 70 /* 71 * Time the connection can be idle before we probe 72 * it to see if we can still talk to the AP. 73 */ 74 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 75 /* 76 * Time we wait for a probe response after sending 77 * a probe request because of beacon loss or for 78 * checking the connection still works. 79 */ 80 static int probe_wait_ms = 500; 81 module_param(probe_wait_ms, int, 0644); 82 MODULE_PARM_DESC(probe_wait_ms, 83 "Maximum time(ms) to wait for probe response" 84 " before disconnecting (reason 4)."); 85 86 /* 87 * How many Beacon frames need to have been used in average signal strength 88 * before starting to indicate signal change events. 89 */ 90 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 91 92 /* 93 * We can have multiple work items (and connection probing) 94 * scheduling this timer, but we need to take care to only 95 * reschedule it when it should fire _earlier_ than it was 96 * asked for before, or if it's not pending right now. This 97 * function ensures that. Note that it then is required to 98 * run this function for all timeouts after the first one 99 * has happened -- the work that runs from this timer will 100 * do that. 101 */ 102 static void run_again(struct ieee80211_sub_if_data *sdata, 103 unsigned long timeout) 104 { 105 sdata_assert_lock(sdata); 106 107 if (!timer_pending(&sdata->u.mgd.timer) || 108 time_before(timeout, sdata->u.mgd.timer.expires)) 109 mod_timer(&sdata->u.mgd.timer, timeout); 110 } 111 112 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 113 { 114 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 115 return; 116 117 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 118 return; 119 120 mod_timer(&sdata->u.mgd.bcn_mon_timer, 121 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 122 } 123 124 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 125 { 126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 127 128 if (unlikely(!ifmgd->associated)) 129 return; 130 131 if (ifmgd->probe_send_count) 132 ifmgd->probe_send_count = 0; 133 134 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 135 return; 136 137 mod_timer(&ifmgd->conn_mon_timer, 138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 139 } 140 141 static int ecw2cw(int ecw) 142 { 143 return (1 << ecw) - 1; 144 } 145 146 static u32 147 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 148 struct ieee80211_supported_band *sband, 149 struct ieee80211_channel *channel, 150 const struct ieee80211_ht_operation *ht_oper, 151 const struct ieee80211_vht_operation *vht_oper, 152 const struct ieee80211_he_operation *he_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 161 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 162 163 chandef->chan = channel; 164 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 165 chandef->center_freq1 = channel->center_freq; 166 chandef->center_freq2 = 0; 167 168 if (!ht_oper || !sta_ht_cap.ht_supported) { 169 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 170 goto out; 171 } 172 173 chandef->width = NL80211_CHAN_WIDTH_20; 174 175 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 176 channel->band); 177 /* check that channel matches the right operating channel */ 178 if (!tracking && channel->center_freq != ht_cfreq) { 179 /* 180 * It's possible that some APs are confused here; 181 * Netgear WNDR3700 sometimes reports 4 higher than 182 * the actual channel in association responses, but 183 * since we look at probe response/beacon data here 184 * it should be OK. 185 */ 186 sdata_info(sdata, 187 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 188 channel->center_freq, ht_cfreq, 189 ht_oper->primary_chan, channel->band); 190 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 191 goto out; 192 } 193 194 /* check 40 MHz support, if we have it */ 195 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 196 ieee80211_chandef_ht_oper(ht_oper, chandef); 197 } else { 198 /* 40 MHz (and 80 MHz) must be supported for VHT */ 199 ret = IEEE80211_STA_DISABLE_VHT; 200 /* also mark 40 MHz disabled */ 201 ret |= IEEE80211_STA_DISABLE_40MHZ; 202 goto out; 203 } 204 205 if (!vht_oper || !sband->vht_cap.vht_supported) { 206 ret = IEEE80211_STA_DISABLE_VHT; 207 goto out; 208 } 209 210 vht_chandef = *chandef; 211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 212 (le32_to_cpu(he_oper->he_oper_params) & 213 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 214 struct ieee80211_vht_operation he_oper_vht_cap; 215 216 /* 217 * Set only first 3 bytes (other 2 aren't used in 218 * ieee80211_chandef_vht_oper() anyway) 219 */ 220 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 221 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 222 223 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 224 &he_oper_vht_cap, ht_oper, 225 &vht_chandef)) { 226 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 227 sdata_info(sdata, 228 "HE AP VHT information is invalid, disable HE\n"); 229 ret = IEEE80211_STA_DISABLE_HE; 230 goto out; 231 } 232 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 233 ht_oper, &vht_chandef)) { 234 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 235 sdata_info(sdata, 236 "AP VHT information is invalid, disable VHT\n"); 237 ret = IEEE80211_STA_DISABLE_VHT; 238 goto out; 239 } 240 241 if (!cfg80211_chandef_valid(&vht_chandef)) { 242 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 243 sdata_info(sdata, 244 "AP VHT information is invalid, disable VHT\n"); 245 ret = IEEE80211_STA_DISABLE_VHT; 246 goto out; 247 } 248 249 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 250 ret = 0; 251 goto out; 252 } 253 254 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 256 sdata_info(sdata, 257 "AP VHT information doesn't match HT, disable VHT\n"); 258 ret = IEEE80211_STA_DISABLE_VHT; 259 goto out; 260 } 261 262 *chandef = vht_chandef; 263 264 ret = 0; 265 266 out: 267 /* 268 * When tracking the current AP, don't do any further checks if the 269 * new chandef is identical to the one we're currently using for the 270 * connection. This keeps us from playing ping-pong with regulatory, 271 * without it the following can happen (for example): 272 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 273 * - AP advertises regdom US 274 * - CRDA loads regdom US with 80 MHz prohibited (old database) 275 * - the code below detects an unsupported channel, downgrades, and 276 * we disconnect from the AP in the caller 277 * - disconnect causes CRDA to reload world regdomain and the game 278 * starts anew. 279 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 280 * 281 * It seems possible that there are still scenarios with CSA or real 282 * bandwidth changes where a this could happen, but those cases are 283 * less common and wouldn't completely prevent using the AP. 284 */ 285 if (tracking && 286 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 287 return ret; 288 289 /* don't print the message below for VHT mismatch if VHT is disabled */ 290 if (ret & IEEE80211_STA_DISABLE_VHT) 291 vht_chandef = *chandef; 292 293 /* 294 * Ignore the DISABLED flag when we're already connected and only 295 * tracking the APs beacon for bandwidth changes - otherwise we 296 * might get disconnected here if we connect to an AP, update our 297 * regulatory information based on the AP's country IE and the 298 * information we have is wrong/outdated and disables the channel 299 * that we're actually using for the connection to the AP. 300 */ 301 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 302 tracking ? 0 : 303 IEEE80211_CHAN_DISABLED)) { 304 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 305 ret = IEEE80211_STA_DISABLE_HT | 306 IEEE80211_STA_DISABLE_VHT; 307 break; 308 } 309 310 ret |= ieee80211_chandef_downgrade(chandef); 311 } 312 313 if (chandef->width != vht_chandef.width && !tracking) 314 sdata_info(sdata, 315 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 316 317 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 318 return ret; 319 } 320 321 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 322 struct sta_info *sta, 323 const struct ieee80211_ht_cap *ht_cap, 324 const struct ieee80211_ht_operation *ht_oper, 325 const struct ieee80211_vht_operation *vht_oper, 326 const struct ieee80211_he_operation *he_oper, 327 const u8 *bssid, u32 *changed) 328 { 329 struct ieee80211_local *local = sdata->local; 330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 331 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 332 struct ieee80211_supported_band *sband = 333 local->hw.wiphy->bands[chan->band]; 334 struct cfg80211_chan_def chandef; 335 u16 ht_opmode; 336 u32 flags; 337 enum ieee80211_sta_rx_bandwidth new_sta_bw; 338 int ret; 339 340 /* if HT was/is disabled, don't track any bandwidth changes */ 341 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 342 return 0; 343 344 /* don't check VHT if we associated as non-VHT station */ 345 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 346 vht_oper = NULL; 347 348 /* don't check HE if we associated as non-HE station */ 349 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 350 !ieee80211_get_he_sta_cap(sband)) 351 he_oper = NULL; 352 353 if (WARN_ON_ONCE(!sta)) 354 return -EINVAL; 355 356 /* 357 * if bss configuration changed store the new one - 358 * this may be applicable even if channel is identical 359 */ 360 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 362 *changed |= BSS_CHANGED_HT; 363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 364 } 365 366 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 367 flags = ieee80211_determine_chantype(sdata, sband, chan, 368 ht_oper, vht_oper, he_oper, 369 &chandef, true); 370 371 /* 372 * Downgrade the new channel if we associated with restricted 373 * capabilities. For example, if we associated as a 20 MHz STA 374 * to a 40 MHz AP (due to regulatory, capabilities or config 375 * reasons) then switching to a 40 MHz channel now won't do us 376 * any good -- we couldn't use it with the AP. 377 */ 378 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 379 chandef.width == NL80211_CHAN_WIDTH_80P80) 380 flags |= ieee80211_chandef_downgrade(&chandef); 381 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 382 chandef.width == NL80211_CHAN_WIDTH_160) 383 flags |= ieee80211_chandef_downgrade(&chandef); 384 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 385 chandef.width > NL80211_CHAN_WIDTH_20) 386 flags |= ieee80211_chandef_downgrade(&chandef); 387 388 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 389 return 0; 390 391 sdata_info(sdata, 392 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 393 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 394 chandef.center_freq1, chandef.center_freq2); 395 396 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 397 IEEE80211_STA_DISABLE_VHT | 398 IEEE80211_STA_DISABLE_40MHZ | 399 IEEE80211_STA_DISABLE_80P80MHZ | 400 IEEE80211_STA_DISABLE_160MHZ)) || 401 !cfg80211_chandef_valid(&chandef)) { 402 sdata_info(sdata, 403 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 404 ifmgd->bssid); 405 return -EINVAL; 406 } 407 408 switch (chandef.width) { 409 case NL80211_CHAN_WIDTH_20_NOHT: 410 case NL80211_CHAN_WIDTH_20: 411 new_sta_bw = IEEE80211_STA_RX_BW_20; 412 break; 413 case NL80211_CHAN_WIDTH_40: 414 new_sta_bw = IEEE80211_STA_RX_BW_40; 415 break; 416 case NL80211_CHAN_WIDTH_80: 417 new_sta_bw = IEEE80211_STA_RX_BW_80; 418 break; 419 case NL80211_CHAN_WIDTH_80P80: 420 case NL80211_CHAN_WIDTH_160: 421 new_sta_bw = IEEE80211_STA_RX_BW_160; 422 break; 423 default: 424 return -EINVAL; 425 } 426 427 if (new_sta_bw > sta->cur_max_bandwidth) 428 new_sta_bw = sta->cur_max_bandwidth; 429 430 if (new_sta_bw < sta->sta.bandwidth) { 431 sta->sta.bandwidth = new_sta_bw; 432 rate_control_rate_update(local, sband, sta, 433 IEEE80211_RC_BW_CHANGED); 434 } 435 436 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 437 if (ret) { 438 sdata_info(sdata, 439 "AP %pM changed bandwidth to incompatible one - disconnect\n", 440 ifmgd->bssid); 441 return ret; 442 } 443 444 if (new_sta_bw > sta->sta.bandwidth) { 445 sta->sta.bandwidth = new_sta_bw; 446 rate_control_rate_update(local, sband, sta, 447 IEEE80211_RC_BW_CHANGED); 448 } 449 450 return 0; 451 } 452 453 /* frame sending functions */ 454 455 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 456 struct sk_buff *skb, u8 ap_ht_param, 457 struct ieee80211_supported_band *sband, 458 struct ieee80211_channel *channel, 459 enum ieee80211_smps_mode smps) 460 { 461 u8 *pos; 462 u32 flags = channel->flags; 463 u16 cap; 464 struct ieee80211_sta_ht_cap ht_cap; 465 466 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 467 468 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 469 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 470 471 /* determine capability flags */ 472 cap = ht_cap.cap; 473 474 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 475 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 476 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 477 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 478 cap &= ~IEEE80211_HT_CAP_SGI_40; 479 } 480 break; 481 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 482 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 483 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 484 cap &= ~IEEE80211_HT_CAP_SGI_40; 485 } 486 break; 487 } 488 489 /* 490 * If 40 MHz was disabled associate as though we weren't 491 * capable of 40 MHz -- some broken APs will never fall 492 * back to trying to transmit in 20 MHz. 493 */ 494 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 496 cap &= ~IEEE80211_HT_CAP_SGI_40; 497 } 498 499 /* set SM PS mode properly */ 500 cap &= ~IEEE80211_HT_CAP_SM_PS; 501 switch (smps) { 502 case IEEE80211_SMPS_AUTOMATIC: 503 case IEEE80211_SMPS_NUM_MODES: 504 WARN_ON(1); 505 /* fall through */ 506 case IEEE80211_SMPS_OFF: 507 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 508 IEEE80211_HT_CAP_SM_PS_SHIFT; 509 break; 510 case IEEE80211_SMPS_STATIC: 511 cap |= WLAN_HT_CAP_SM_PS_STATIC << 512 IEEE80211_HT_CAP_SM_PS_SHIFT; 513 break; 514 case IEEE80211_SMPS_DYNAMIC: 515 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 516 IEEE80211_HT_CAP_SM_PS_SHIFT; 517 break; 518 } 519 520 /* reserve and fill IE */ 521 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 522 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 523 } 524 525 /* This function determines vht capability flags for the association 526 * and builds the IE. 527 * Note - the function may set the owner of the MU-MIMO capability 528 */ 529 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 530 struct sk_buff *skb, 531 struct ieee80211_supported_band *sband, 532 struct ieee80211_vht_cap *ap_vht_cap) 533 { 534 struct ieee80211_local *local = sdata->local; 535 u8 *pos; 536 u32 cap; 537 struct ieee80211_sta_vht_cap vht_cap; 538 u32 mask, ap_bf_sts, our_bf_sts; 539 540 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 541 542 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 543 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 544 545 /* determine capability flags */ 546 cap = vht_cap.cap; 547 548 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 549 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 550 551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 552 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 553 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 554 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 555 } 556 557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 558 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 559 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 560 } 561 562 /* 563 * Some APs apparently get confused if our capabilities are better 564 * than theirs, so restrict what we advertise in the assoc request. 565 */ 566 if (!(ap_vht_cap->vht_cap_info & 567 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 568 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 569 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 570 else if (!(ap_vht_cap->vht_cap_info & 571 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 572 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 573 574 /* 575 * If some other vif is using the MU-MIMO capablity we cannot associate 576 * using MU-MIMO - this will lead to contradictions in the group-id 577 * mechanism. 578 * Ownership is defined since association request, in order to avoid 579 * simultaneous associations with MU-MIMO. 580 */ 581 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 582 bool disable_mu_mimo = false; 583 struct ieee80211_sub_if_data *other; 584 585 list_for_each_entry_rcu(other, &local->interfaces, list) { 586 if (other->vif.mu_mimo_owner) { 587 disable_mu_mimo = true; 588 break; 589 } 590 } 591 if (disable_mu_mimo) 592 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 593 else 594 sdata->vif.mu_mimo_owner = true; 595 } 596 597 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 598 599 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 600 our_bf_sts = cap & mask; 601 602 if (ap_bf_sts < our_bf_sts) { 603 cap &= ~mask; 604 cap |= ap_bf_sts; 605 } 606 607 /* reserve and fill IE */ 608 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 609 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 610 } 611 612 /* This function determines HE capability flags for the association 613 * and builds the IE. 614 */ 615 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 616 struct sk_buff *skb, 617 struct ieee80211_supported_band *sband) 618 { 619 u8 *pos; 620 const struct ieee80211_sta_he_cap *he_cap = NULL; 621 u8 he_cap_size; 622 623 he_cap = ieee80211_get_he_sta_cap(sband); 624 if (!he_cap) 625 return; 626 627 /* 628 * TODO: the 1 added is because this temporarily is under the EXTENSION 629 * IE. Get rid of it when it moves. 630 */ 631 he_cap_size = 632 2 + 1 + sizeof(he_cap->he_cap_elem) + 633 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 634 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 635 he_cap->he_cap_elem.phy_cap_info); 636 pos = skb_put(skb, he_cap_size); 637 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 638 } 639 640 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 641 { 642 struct ieee80211_local *local = sdata->local; 643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 644 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 645 struct sk_buff *skb; 646 struct ieee80211_mgmt *mgmt; 647 u8 *pos, qos_info; 648 size_t offset = 0, noffset; 649 int i, count, rates_len, supp_rates_len, shift; 650 u16 capab; 651 struct ieee80211_supported_band *sband; 652 struct ieee80211_chanctx_conf *chanctx_conf; 653 struct ieee80211_channel *chan; 654 u32 rates = 0; 655 656 sdata_assert_lock(sdata); 657 658 rcu_read_lock(); 659 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 660 if (WARN_ON(!chanctx_conf)) { 661 rcu_read_unlock(); 662 return; 663 } 664 chan = chanctx_conf->def.chan; 665 rcu_read_unlock(); 666 sband = local->hw.wiphy->bands[chan->band]; 667 shift = ieee80211_vif_get_shift(&sdata->vif); 668 669 if (assoc_data->supp_rates_len) { 670 /* 671 * Get all rates supported by the device and the AP as 672 * some APs don't like getting a superset of their rates 673 * in the association request (e.g. D-Link DAP 1353 in 674 * b-only mode)... 675 */ 676 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 677 assoc_data->supp_rates, 678 assoc_data->supp_rates_len, 679 &rates); 680 } else { 681 /* 682 * In case AP not provide any supported rates information 683 * before association, we send information element(s) with 684 * all rates that we support. 685 */ 686 rates_len = 0; 687 for (i = 0; i < sband->n_bitrates; i++) { 688 rates |= BIT(i); 689 rates_len++; 690 } 691 } 692 693 skb = alloc_skb(local->hw.extra_tx_headroom + 694 sizeof(*mgmt) + /* bit too much but doesn't matter */ 695 2 + assoc_data->ssid_len + /* SSID */ 696 4 + rates_len + /* (extended) rates */ 697 4 + /* power capability */ 698 2 + 2 * sband->n_channels + /* supported channels */ 699 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 700 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 701 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 702 sizeof(struct ieee80211_he_mcs_nss_supp) + 703 IEEE80211_HE_PPE_THRES_MAX_LEN + 704 assoc_data->ie_len + /* extra IEs */ 705 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 706 9, /* WMM */ 707 GFP_KERNEL); 708 if (!skb) 709 return; 710 711 skb_reserve(skb, local->hw.extra_tx_headroom); 712 713 capab = WLAN_CAPABILITY_ESS; 714 715 if (sband->band == NL80211_BAND_2GHZ) { 716 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 717 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 718 } 719 720 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 721 capab |= WLAN_CAPABILITY_PRIVACY; 722 723 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 724 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 725 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 726 727 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 728 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 729 730 mgmt = skb_put_zero(skb, 24); 731 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 732 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 733 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 734 735 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 736 skb_put(skb, 10); 737 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 738 IEEE80211_STYPE_REASSOC_REQ); 739 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 740 mgmt->u.reassoc_req.listen_interval = 741 cpu_to_le16(local->hw.conf.listen_interval); 742 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 743 ETH_ALEN); 744 } else { 745 skb_put(skb, 4); 746 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 747 IEEE80211_STYPE_ASSOC_REQ); 748 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 749 mgmt->u.assoc_req.listen_interval = 750 cpu_to_le16(local->hw.conf.listen_interval); 751 } 752 753 /* SSID */ 754 pos = skb_put(skb, 2 + assoc_data->ssid_len); 755 *pos++ = WLAN_EID_SSID; 756 *pos++ = assoc_data->ssid_len; 757 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 758 759 /* add all rates which were marked to be used above */ 760 supp_rates_len = rates_len; 761 if (supp_rates_len > 8) 762 supp_rates_len = 8; 763 764 pos = skb_put(skb, supp_rates_len + 2); 765 *pos++ = WLAN_EID_SUPP_RATES; 766 *pos++ = supp_rates_len; 767 768 count = 0; 769 for (i = 0; i < sband->n_bitrates; i++) { 770 if (BIT(i) & rates) { 771 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 772 5 * (1 << shift)); 773 *pos++ = (u8) rate; 774 if (++count == 8) 775 break; 776 } 777 } 778 779 if (rates_len > count) { 780 pos = skb_put(skb, rates_len - count + 2); 781 *pos++ = WLAN_EID_EXT_SUPP_RATES; 782 *pos++ = rates_len - count; 783 784 for (i++; i < sband->n_bitrates; i++) { 785 if (BIT(i) & rates) { 786 int rate; 787 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 788 5 * (1 << shift)); 789 *pos++ = (u8) rate; 790 } 791 } 792 } 793 794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 795 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 796 pos = skb_put(skb, 4); 797 *pos++ = WLAN_EID_PWR_CAPABILITY; 798 *pos++ = 2; 799 *pos++ = 0; /* min tx power */ 800 /* max tx power */ 801 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 802 } 803 804 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 805 /* TODO: get this in reg domain format */ 806 pos = skb_put(skb, 2 * sband->n_channels + 2); 807 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 808 *pos++ = 2 * sband->n_channels; 809 for (i = 0; i < sband->n_channels; i++) { 810 *pos++ = ieee80211_frequency_to_channel( 811 sband->channels[i].center_freq); 812 *pos++ = 1; /* one channel in the subband*/ 813 } 814 } 815 816 /* if present, add any custom IEs that go before HT */ 817 if (assoc_data->ie_len) { 818 static const u8 before_ht[] = { 819 WLAN_EID_SSID, 820 WLAN_EID_SUPP_RATES, 821 WLAN_EID_EXT_SUPP_RATES, 822 WLAN_EID_PWR_CAPABILITY, 823 WLAN_EID_SUPPORTED_CHANNELS, 824 WLAN_EID_RSN, 825 WLAN_EID_QOS_CAPA, 826 WLAN_EID_RRM_ENABLED_CAPABILITIES, 827 WLAN_EID_MOBILITY_DOMAIN, 828 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 829 WLAN_EID_RIC_DATA, /* reassoc only */ 830 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 831 }; 832 static const u8 after_ric[] = { 833 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 834 WLAN_EID_HT_CAPABILITY, 835 WLAN_EID_BSS_COEX_2040, 836 /* luckily this is almost always there */ 837 WLAN_EID_EXT_CAPABILITY, 838 WLAN_EID_QOS_TRAFFIC_CAPA, 839 WLAN_EID_TIM_BCAST_REQ, 840 WLAN_EID_INTERWORKING, 841 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 842 WLAN_EID_VHT_CAPABILITY, 843 WLAN_EID_OPMODE_NOTIF, 844 }; 845 846 noffset = ieee80211_ie_split_ric(assoc_data->ie, 847 assoc_data->ie_len, 848 before_ht, 849 ARRAY_SIZE(before_ht), 850 after_ric, 851 ARRAY_SIZE(after_ric), 852 offset); 853 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 854 offset = noffset; 855 } 856 857 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 858 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 859 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 860 861 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 862 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 863 sband, chan, sdata->smps_mode); 864 865 /* if present, add any custom IEs that go before VHT */ 866 if (assoc_data->ie_len) { 867 static const u8 before_vht[] = { 868 /* 869 * no need to list the ones split off before HT 870 * or generated here 871 */ 872 WLAN_EID_BSS_COEX_2040, 873 WLAN_EID_EXT_CAPABILITY, 874 WLAN_EID_QOS_TRAFFIC_CAPA, 875 WLAN_EID_TIM_BCAST_REQ, 876 WLAN_EID_INTERWORKING, 877 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 878 }; 879 880 /* RIC already taken above, so no need to handle here anymore */ 881 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 882 before_vht, ARRAY_SIZE(before_vht), 883 offset); 884 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 885 offset = noffset; 886 } 887 888 /* if present, add any custom IEs that go before HE */ 889 if (assoc_data->ie_len) { 890 static const u8 before_he[] = { 891 /* 892 * no need to list the ones split off before VHT 893 * or generated here 894 */ 895 WLAN_EID_OPMODE_NOTIF, 896 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 897 /* 11ai elements */ 898 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 899 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 900 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 901 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 902 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 903 /* TODO: add 11ah/11aj/11ak elements */ 904 }; 905 906 /* RIC already taken above, so no need to handle here anymore */ 907 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 908 before_he, ARRAY_SIZE(before_he), 909 offset); 910 pos = skb_put(skb, noffset - offset); 911 memcpy(pos, assoc_data->ie + offset, noffset - offset); 912 offset = noffset; 913 } 914 915 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 916 ieee80211_add_vht_ie(sdata, skb, sband, 917 &assoc_data->ap_vht_cap); 918 919 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 920 ieee80211_add_he_ie(sdata, skb, sband); 921 922 /* if present, add any custom non-vendor IEs that go after HE */ 923 if (assoc_data->ie_len) { 924 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 925 assoc_data->ie_len, 926 offset); 927 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 928 offset = noffset; 929 } 930 931 if (assoc_data->wmm) { 932 if (assoc_data->uapsd) { 933 qos_info = ifmgd->uapsd_queues; 934 qos_info |= (ifmgd->uapsd_max_sp_len << 935 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 936 } else { 937 qos_info = 0; 938 } 939 940 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 941 } 942 943 /* add any remaining custom (i.e. vendor specific here) IEs */ 944 if (assoc_data->ie_len) { 945 noffset = assoc_data->ie_len; 946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 947 } 948 949 if (assoc_data->fils_kek_len && 950 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 951 dev_kfree_skb(skb); 952 return; 953 } 954 955 drv_mgd_prepare_tx(local, sdata, 0); 956 957 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 958 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 960 IEEE80211_TX_INTFL_MLME_CONN_TX; 961 ieee80211_tx_skb(sdata, skb); 962 } 963 964 void ieee80211_send_pspoll(struct ieee80211_local *local, 965 struct ieee80211_sub_if_data *sdata) 966 { 967 struct ieee80211_pspoll *pspoll; 968 struct sk_buff *skb; 969 970 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 971 if (!skb) 972 return; 973 974 pspoll = (struct ieee80211_pspoll *) skb->data; 975 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 976 977 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 978 ieee80211_tx_skb(sdata, skb); 979 } 980 981 void ieee80211_send_nullfunc(struct ieee80211_local *local, 982 struct ieee80211_sub_if_data *sdata, 983 bool powersave) 984 { 985 struct sk_buff *skb; 986 struct ieee80211_hdr_3addr *nullfunc; 987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 988 989 /* Don't send NDPs when STA is connected HE */ 990 if (sdata->vif.type == NL80211_IFTYPE_STATION && 991 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 992 return; 993 994 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 995 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 996 if (!skb) 997 return; 998 999 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1000 if (powersave) 1001 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1002 1003 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1004 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1005 1006 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1007 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1008 1009 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1010 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1011 1012 ieee80211_tx_skb(sdata, skb); 1013 } 1014 1015 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1016 struct ieee80211_sub_if_data *sdata) 1017 { 1018 struct sk_buff *skb; 1019 struct ieee80211_hdr *nullfunc; 1020 __le16 fc; 1021 1022 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1023 return; 1024 1025 /* Don't send NDPs when connected HE */ 1026 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1027 return; 1028 1029 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1030 if (!skb) 1031 return; 1032 1033 skb_reserve(skb, local->hw.extra_tx_headroom); 1034 1035 nullfunc = skb_put_zero(skb, 30); 1036 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1037 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1038 nullfunc->frame_control = fc; 1039 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1040 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1041 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1042 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1043 1044 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1045 ieee80211_tx_skb(sdata, skb); 1046 } 1047 1048 /* spectrum management related things */ 1049 static void ieee80211_chswitch_work(struct work_struct *work) 1050 { 1051 struct ieee80211_sub_if_data *sdata = 1052 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1053 struct ieee80211_local *local = sdata->local; 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1055 int ret; 1056 1057 if (!ieee80211_sdata_running(sdata)) 1058 return; 1059 1060 sdata_lock(sdata); 1061 mutex_lock(&local->mtx); 1062 mutex_lock(&local->chanctx_mtx); 1063 1064 if (!ifmgd->associated) 1065 goto out; 1066 1067 if (!sdata->vif.csa_active) 1068 goto out; 1069 1070 /* 1071 * using reservation isn't immediate as it may be deferred until later 1072 * with multi-vif. once reservation is complete it will re-schedule the 1073 * work with no reserved_chanctx so verify chandef to check if it 1074 * completed successfully 1075 */ 1076 1077 if (sdata->reserved_chanctx) { 1078 struct ieee80211_supported_band *sband = NULL; 1079 struct sta_info *mgd_sta = NULL; 1080 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1081 1082 /* 1083 * with multi-vif csa driver may call ieee80211_csa_finish() 1084 * many times while waiting for other interfaces to use their 1085 * reservations 1086 */ 1087 if (sdata->reserved_ready) 1088 goto out; 1089 1090 if (sdata->vif.bss_conf.chandef.width != 1091 sdata->csa_chandef.width) { 1092 /* 1093 * For managed interface, we need to also update the AP 1094 * station bandwidth and align the rate scale algorithm 1095 * on the bandwidth change. Here we only consider the 1096 * bandwidth of the new channel definition (as channel 1097 * switch flow does not have the full HT/VHT/HE 1098 * information), assuming that if additional changes are 1099 * required they would be done as part of the processing 1100 * of the next beacon from the AP. 1101 */ 1102 switch (sdata->csa_chandef.width) { 1103 case NL80211_CHAN_WIDTH_20_NOHT: 1104 case NL80211_CHAN_WIDTH_20: 1105 default: 1106 bw = IEEE80211_STA_RX_BW_20; 1107 break; 1108 case NL80211_CHAN_WIDTH_40: 1109 bw = IEEE80211_STA_RX_BW_40; 1110 break; 1111 case NL80211_CHAN_WIDTH_80: 1112 bw = IEEE80211_STA_RX_BW_80; 1113 break; 1114 case NL80211_CHAN_WIDTH_80P80: 1115 case NL80211_CHAN_WIDTH_160: 1116 bw = IEEE80211_STA_RX_BW_160; 1117 break; 1118 } 1119 1120 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1121 sband = 1122 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1123 } 1124 1125 if (sdata->vif.bss_conf.chandef.width > 1126 sdata->csa_chandef.width) { 1127 mgd_sta->sta.bandwidth = bw; 1128 rate_control_rate_update(local, sband, mgd_sta, 1129 IEEE80211_RC_BW_CHANGED); 1130 } 1131 1132 ret = ieee80211_vif_use_reserved_context(sdata); 1133 if (ret) { 1134 sdata_info(sdata, 1135 "failed to use reserved channel context, disconnecting (err=%d)\n", 1136 ret); 1137 ieee80211_queue_work(&sdata->local->hw, 1138 &ifmgd->csa_connection_drop_work); 1139 goto out; 1140 } 1141 1142 if (sdata->vif.bss_conf.chandef.width < 1143 sdata->csa_chandef.width) { 1144 mgd_sta->sta.bandwidth = bw; 1145 rate_control_rate_update(local, sband, mgd_sta, 1146 IEEE80211_RC_BW_CHANGED); 1147 } 1148 1149 goto out; 1150 } 1151 1152 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1153 &sdata->csa_chandef)) { 1154 sdata_info(sdata, 1155 "failed to finalize channel switch, disconnecting\n"); 1156 ieee80211_queue_work(&sdata->local->hw, 1157 &ifmgd->csa_connection_drop_work); 1158 goto out; 1159 } 1160 1161 /* XXX: shouldn't really modify cfg80211-owned data! */ 1162 ifmgd->associated->channel = sdata->csa_chandef.chan; 1163 1164 ifmgd->csa_waiting_bcn = true; 1165 1166 ieee80211_sta_reset_beacon_monitor(sdata); 1167 ieee80211_sta_reset_conn_monitor(sdata); 1168 1169 out: 1170 mutex_unlock(&local->chanctx_mtx); 1171 mutex_unlock(&local->mtx); 1172 sdata_unlock(sdata); 1173 } 1174 1175 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1176 { 1177 struct ieee80211_local *local = sdata->local; 1178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1179 int ret; 1180 1181 sdata_assert_lock(sdata); 1182 1183 WARN_ON(!sdata->vif.csa_active); 1184 1185 if (sdata->csa_block_tx) { 1186 ieee80211_wake_vif_queues(local, sdata, 1187 IEEE80211_QUEUE_STOP_REASON_CSA); 1188 sdata->csa_block_tx = false; 1189 } 1190 1191 sdata->vif.csa_active = false; 1192 ifmgd->csa_waiting_bcn = false; 1193 1194 ret = drv_post_channel_switch(sdata); 1195 if (ret) { 1196 sdata_info(sdata, 1197 "driver post channel switch failed, disconnecting\n"); 1198 ieee80211_queue_work(&local->hw, 1199 &ifmgd->csa_connection_drop_work); 1200 return; 1201 } 1202 1203 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1204 } 1205 1206 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1207 { 1208 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1210 1211 trace_api_chswitch_done(sdata, success); 1212 if (!success) { 1213 sdata_info(sdata, 1214 "driver channel switch failed, disconnecting\n"); 1215 ieee80211_queue_work(&sdata->local->hw, 1216 &ifmgd->csa_connection_drop_work); 1217 } else { 1218 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1219 } 1220 } 1221 EXPORT_SYMBOL(ieee80211_chswitch_done); 1222 1223 static void ieee80211_chswitch_timer(struct timer_list *t) 1224 { 1225 struct ieee80211_sub_if_data *sdata = 1226 from_timer(sdata, t, u.mgd.chswitch_timer); 1227 1228 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1229 } 1230 1231 static void 1232 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1233 u64 timestamp, u32 device_timestamp, 1234 struct ieee802_11_elems *elems, 1235 bool beacon) 1236 { 1237 struct ieee80211_local *local = sdata->local; 1238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1239 struct cfg80211_bss *cbss = ifmgd->associated; 1240 struct ieee80211_chanctx_conf *conf; 1241 struct ieee80211_chanctx *chanctx; 1242 enum nl80211_band current_band; 1243 struct ieee80211_csa_ie csa_ie; 1244 struct ieee80211_channel_switch ch_switch; 1245 int res; 1246 1247 sdata_assert_lock(sdata); 1248 1249 if (!cbss) 1250 return; 1251 1252 if (local->scanning) 1253 return; 1254 1255 /* disregard subsequent announcements if we are already processing */ 1256 if (sdata->vif.csa_active) 1257 return; 1258 1259 current_band = cbss->channel->band; 1260 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1261 ifmgd->flags, 1262 ifmgd->associated->bssid, &csa_ie); 1263 if (res < 0) 1264 ieee80211_queue_work(&local->hw, 1265 &ifmgd->csa_connection_drop_work); 1266 if (res) 1267 return; 1268 1269 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1270 IEEE80211_CHAN_DISABLED)) { 1271 sdata_info(sdata, 1272 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1273 ifmgd->associated->bssid, 1274 csa_ie.chandef.chan->center_freq, 1275 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1276 csa_ie.chandef.center_freq2); 1277 ieee80211_queue_work(&local->hw, 1278 &ifmgd->csa_connection_drop_work); 1279 return; 1280 } 1281 1282 if (cfg80211_chandef_identical(&csa_ie.chandef, 1283 &sdata->vif.bss_conf.chandef)) { 1284 if (ifmgd->csa_ignored_same_chan) 1285 return; 1286 sdata_info(sdata, 1287 "AP %pM tries to chanswitch to same channel, ignore\n", 1288 ifmgd->associated->bssid); 1289 ifmgd->csa_ignored_same_chan = true; 1290 return; 1291 } 1292 1293 /* 1294 * Drop all TDLS peers - either we disconnect or move to a different 1295 * channel from this point on. There's no telling what our peer will do. 1296 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1297 * have an incompatible wider chandef. 1298 */ 1299 ieee80211_teardown_tdls_peers(sdata); 1300 1301 mutex_lock(&local->mtx); 1302 mutex_lock(&local->chanctx_mtx); 1303 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1304 lockdep_is_held(&local->chanctx_mtx)); 1305 if (!conf) { 1306 sdata_info(sdata, 1307 "no channel context assigned to vif?, disconnecting\n"); 1308 goto drop_connection; 1309 } 1310 1311 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1312 1313 if (local->use_chanctx && 1314 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1315 sdata_info(sdata, 1316 "driver doesn't support chan-switch with channel contexts\n"); 1317 goto drop_connection; 1318 } 1319 1320 ch_switch.timestamp = timestamp; 1321 ch_switch.device_timestamp = device_timestamp; 1322 ch_switch.block_tx = csa_ie.mode; 1323 ch_switch.chandef = csa_ie.chandef; 1324 ch_switch.count = csa_ie.count; 1325 1326 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1327 sdata_info(sdata, 1328 "preparing for channel switch failed, disconnecting\n"); 1329 goto drop_connection; 1330 } 1331 1332 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1333 chanctx->mode, false); 1334 if (res) { 1335 sdata_info(sdata, 1336 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1337 res); 1338 goto drop_connection; 1339 } 1340 mutex_unlock(&local->chanctx_mtx); 1341 1342 sdata->vif.csa_active = true; 1343 sdata->csa_chandef = csa_ie.chandef; 1344 sdata->csa_block_tx = csa_ie.mode; 1345 ifmgd->csa_ignored_same_chan = false; 1346 1347 if (sdata->csa_block_tx) 1348 ieee80211_stop_vif_queues(local, sdata, 1349 IEEE80211_QUEUE_STOP_REASON_CSA); 1350 mutex_unlock(&local->mtx); 1351 1352 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1353 csa_ie.count); 1354 1355 if (local->ops->channel_switch) { 1356 /* use driver's channel switch callback */ 1357 drv_channel_switch(local, sdata, &ch_switch); 1358 return; 1359 } 1360 1361 /* channel switch handled in software */ 1362 if (csa_ie.count <= 1) 1363 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1364 else 1365 mod_timer(&ifmgd->chswitch_timer, 1366 TU_TO_EXP_TIME((csa_ie.count - 1) * 1367 cbss->beacon_interval)); 1368 return; 1369 drop_connection: 1370 /* 1371 * This is just so that the disconnect flow will know that 1372 * we were trying to switch channel and failed. In case the 1373 * mode is 1 (we are not allowed to Tx), we will know not to 1374 * send a deauthentication frame. Those two fields will be 1375 * reset when the disconnection worker runs. 1376 */ 1377 sdata->vif.csa_active = true; 1378 sdata->csa_block_tx = csa_ie.mode; 1379 1380 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1381 mutex_unlock(&local->chanctx_mtx); 1382 mutex_unlock(&local->mtx); 1383 } 1384 1385 static bool 1386 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1387 struct ieee80211_channel *channel, 1388 const u8 *country_ie, u8 country_ie_len, 1389 const u8 *pwr_constr_elem, 1390 int *chan_pwr, int *pwr_reduction) 1391 { 1392 struct ieee80211_country_ie_triplet *triplet; 1393 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1394 int i, chan_increment; 1395 bool have_chan_pwr = false; 1396 1397 /* Invalid IE */ 1398 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1399 return false; 1400 1401 triplet = (void *)(country_ie + 3); 1402 country_ie_len -= 3; 1403 1404 switch (channel->band) { 1405 default: 1406 WARN_ON_ONCE(1); 1407 /* fall through */ 1408 case NL80211_BAND_2GHZ: 1409 case NL80211_BAND_60GHZ: 1410 chan_increment = 1; 1411 break; 1412 case NL80211_BAND_5GHZ: 1413 chan_increment = 4; 1414 break; 1415 } 1416 1417 /* find channel */ 1418 while (country_ie_len >= 3) { 1419 u8 first_channel = triplet->chans.first_channel; 1420 1421 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1422 goto next; 1423 1424 for (i = 0; i < triplet->chans.num_channels; i++) { 1425 if (first_channel + i * chan_increment == chan) { 1426 have_chan_pwr = true; 1427 *chan_pwr = triplet->chans.max_power; 1428 break; 1429 } 1430 } 1431 if (have_chan_pwr) 1432 break; 1433 1434 next: 1435 triplet++; 1436 country_ie_len -= 3; 1437 } 1438 1439 if (have_chan_pwr && pwr_constr_elem) 1440 *pwr_reduction = *pwr_constr_elem; 1441 else 1442 *pwr_reduction = 0; 1443 1444 return have_chan_pwr; 1445 } 1446 1447 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1448 struct ieee80211_channel *channel, 1449 const u8 *cisco_dtpc_ie, 1450 int *pwr_level) 1451 { 1452 /* From practical testing, the first data byte of the DTPC element 1453 * seems to contain the requested dBm level, and the CLI on Cisco 1454 * APs clearly state the range is -127 to 127 dBm, which indicates 1455 * a signed byte, although it seemingly never actually goes negative. 1456 * The other byte seems to always be zero. 1457 */ 1458 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1459 } 1460 1461 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1462 struct ieee80211_channel *channel, 1463 struct ieee80211_mgmt *mgmt, 1464 const u8 *country_ie, u8 country_ie_len, 1465 const u8 *pwr_constr_ie, 1466 const u8 *cisco_dtpc_ie) 1467 { 1468 bool has_80211h_pwr = false, has_cisco_pwr = false; 1469 int chan_pwr = 0, pwr_reduction_80211h = 0; 1470 int pwr_level_cisco, pwr_level_80211h; 1471 int new_ap_level; 1472 __le16 capab = mgmt->u.probe_resp.capab_info; 1473 1474 if (country_ie && 1475 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1476 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1477 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1478 sdata, channel, country_ie, country_ie_len, 1479 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1480 pwr_level_80211h = 1481 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1482 } 1483 1484 if (cisco_dtpc_ie) { 1485 ieee80211_find_cisco_dtpc( 1486 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1487 has_cisco_pwr = true; 1488 } 1489 1490 if (!has_80211h_pwr && !has_cisco_pwr) 1491 return 0; 1492 1493 /* If we have both 802.11h and Cisco DTPC, apply both limits 1494 * by picking the smallest of the two power levels advertised. 1495 */ 1496 if (has_80211h_pwr && 1497 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1498 new_ap_level = pwr_level_80211h; 1499 1500 if (sdata->ap_power_level == new_ap_level) 1501 return 0; 1502 1503 sdata_dbg(sdata, 1504 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1505 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1506 sdata->u.mgd.bssid); 1507 } else { /* has_cisco_pwr is always true here. */ 1508 new_ap_level = pwr_level_cisco; 1509 1510 if (sdata->ap_power_level == new_ap_level) 1511 return 0; 1512 1513 sdata_dbg(sdata, 1514 "Limiting TX power to %d dBm as advertised by %pM\n", 1515 pwr_level_cisco, sdata->u.mgd.bssid); 1516 } 1517 1518 sdata->ap_power_level = new_ap_level; 1519 if (__ieee80211_recalc_txpower(sdata)) 1520 return BSS_CHANGED_TXPOWER; 1521 return 0; 1522 } 1523 1524 /* powersave */ 1525 static void ieee80211_enable_ps(struct ieee80211_local *local, 1526 struct ieee80211_sub_if_data *sdata) 1527 { 1528 struct ieee80211_conf *conf = &local->hw.conf; 1529 1530 /* 1531 * If we are scanning right now then the parameters will 1532 * take effect when scan finishes. 1533 */ 1534 if (local->scanning) 1535 return; 1536 1537 if (conf->dynamic_ps_timeout > 0 && 1538 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1539 mod_timer(&local->dynamic_ps_timer, jiffies + 1540 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1541 } else { 1542 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1543 ieee80211_send_nullfunc(local, sdata, true); 1544 1545 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1546 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1547 return; 1548 1549 conf->flags |= IEEE80211_CONF_PS; 1550 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1551 } 1552 } 1553 1554 static void ieee80211_change_ps(struct ieee80211_local *local) 1555 { 1556 struct ieee80211_conf *conf = &local->hw.conf; 1557 1558 if (local->ps_sdata) { 1559 ieee80211_enable_ps(local, local->ps_sdata); 1560 } else if (conf->flags & IEEE80211_CONF_PS) { 1561 conf->flags &= ~IEEE80211_CONF_PS; 1562 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1563 del_timer_sync(&local->dynamic_ps_timer); 1564 cancel_work_sync(&local->dynamic_ps_enable_work); 1565 } 1566 } 1567 1568 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1569 { 1570 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1571 struct sta_info *sta = NULL; 1572 bool authorized = false; 1573 1574 if (!mgd->powersave) 1575 return false; 1576 1577 if (mgd->broken_ap) 1578 return false; 1579 1580 if (!mgd->associated) 1581 return false; 1582 1583 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1584 return false; 1585 1586 if (!mgd->have_beacon) 1587 return false; 1588 1589 rcu_read_lock(); 1590 sta = sta_info_get(sdata, mgd->bssid); 1591 if (sta) 1592 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1593 rcu_read_unlock(); 1594 1595 return authorized; 1596 } 1597 1598 /* need to hold RTNL or interface lock */ 1599 void ieee80211_recalc_ps(struct ieee80211_local *local) 1600 { 1601 struct ieee80211_sub_if_data *sdata, *found = NULL; 1602 int count = 0; 1603 int timeout; 1604 1605 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1606 local->ps_sdata = NULL; 1607 return; 1608 } 1609 1610 list_for_each_entry(sdata, &local->interfaces, list) { 1611 if (!ieee80211_sdata_running(sdata)) 1612 continue; 1613 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1614 /* If an AP vif is found, then disable PS 1615 * by setting the count to zero thereby setting 1616 * ps_sdata to NULL. 1617 */ 1618 count = 0; 1619 break; 1620 } 1621 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1622 continue; 1623 found = sdata; 1624 count++; 1625 } 1626 1627 if (count == 1 && ieee80211_powersave_allowed(found)) { 1628 u8 dtimper = found->u.mgd.dtim_period; 1629 1630 timeout = local->dynamic_ps_forced_timeout; 1631 if (timeout < 0) 1632 timeout = 100; 1633 local->hw.conf.dynamic_ps_timeout = timeout; 1634 1635 /* If the TIM IE is invalid, pretend the value is 1 */ 1636 if (!dtimper) 1637 dtimper = 1; 1638 1639 local->hw.conf.ps_dtim_period = dtimper; 1640 local->ps_sdata = found; 1641 } else { 1642 local->ps_sdata = NULL; 1643 } 1644 1645 ieee80211_change_ps(local); 1646 } 1647 1648 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1649 { 1650 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1651 1652 if (sdata->vif.bss_conf.ps != ps_allowed) { 1653 sdata->vif.bss_conf.ps = ps_allowed; 1654 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1655 } 1656 } 1657 1658 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1659 { 1660 struct ieee80211_local *local = 1661 container_of(work, struct ieee80211_local, 1662 dynamic_ps_disable_work); 1663 1664 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1665 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1666 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1667 } 1668 1669 ieee80211_wake_queues_by_reason(&local->hw, 1670 IEEE80211_MAX_QUEUE_MAP, 1671 IEEE80211_QUEUE_STOP_REASON_PS, 1672 false); 1673 } 1674 1675 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1676 { 1677 struct ieee80211_local *local = 1678 container_of(work, struct ieee80211_local, 1679 dynamic_ps_enable_work); 1680 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1681 struct ieee80211_if_managed *ifmgd; 1682 unsigned long flags; 1683 int q; 1684 1685 /* can only happen when PS was just disabled anyway */ 1686 if (!sdata) 1687 return; 1688 1689 ifmgd = &sdata->u.mgd; 1690 1691 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1692 return; 1693 1694 if (local->hw.conf.dynamic_ps_timeout > 0) { 1695 /* don't enter PS if TX frames are pending */ 1696 if (drv_tx_frames_pending(local)) { 1697 mod_timer(&local->dynamic_ps_timer, jiffies + 1698 msecs_to_jiffies( 1699 local->hw.conf.dynamic_ps_timeout)); 1700 return; 1701 } 1702 1703 /* 1704 * transmission can be stopped by others which leads to 1705 * dynamic_ps_timer expiry. Postpone the ps timer if it 1706 * is not the actual idle state. 1707 */ 1708 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1709 for (q = 0; q < local->hw.queues; q++) { 1710 if (local->queue_stop_reasons[q]) { 1711 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1712 flags); 1713 mod_timer(&local->dynamic_ps_timer, jiffies + 1714 msecs_to_jiffies( 1715 local->hw.conf.dynamic_ps_timeout)); 1716 return; 1717 } 1718 } 1719 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1720 } 1721 1722 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1723 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1724 if (drv_tx_frames_pending(local)) { 1725 mod_timer(&local->dynamic_ps_timer, jiffies + 1726 msecs_to_jiffies( 1727 local->hw.conf.dynamic_ps_timeout)); 1728 } else { 1729 ieee80211_send_nullfunc(local, sdata, true); 1730 /* Flush to get the tx status of nullfunc frame */ 1731 ieee80211_flush_queues(local, sdata, false); 1732 } 1733 } 1734 1735 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1736 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1737 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1738 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1739 local->hw.conf.flags |= IEEE80211_CONF_PS; 1740 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1741 } 1742 } 1743 1744 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1745 { 1746 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1747 1748 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1749 } 1750 1751 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1752 { 1753 struct delayed_work *delayed_work = to_delayed_work(work); 1754 struct ieee80211_sub_if_data *sdata = 1755 container_of(delayed_work, struct ieee80211_sub_if_data, 1756 dfs_cac_timer_work); 1757 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1758 1759 mutex_lock(&sdata->local->mtx); 1760 if (sdata->wdev.cac_started) { 1761 ieee80211_vif_release_channel(sdata); 1762 cfg80211_cac_event(sdata->dev, &chandef, 1763 NL80211_RADAR_CAC_FINISHED, 1764 GFP_KERNEL); 1765 } 1766 mutex_unlock(&sdata->local->mtx); 1767 } 1768 1769 static bool 1770 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1771 { 1772 struct ieee80211_local *local = sdata->local; 1773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1774 bool ret = false; 1775 int ac; 1776 1777 if (local->hw.queues < IEEE80211_NUM_ACS) 1778 return false; 1779 1780 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1781 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1782 int non_acm_ac; 1783 unsigned long now = jiffies; 1784 1785 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1786 tx_tspec->admitted_time && 1787 time_after(now, tx_tspec->time_slice_start + HZ)) { 1788 tx_tspec->consumed_tx_time = 0; 1789 tx_tspec->time_slice_start = now; 1790 1791 if (tx_tspec->downgraded) 1792 tx_tspec->action = 1793 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1794 } 1795 1796 switch (tx_tspec->action) { 1797 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1798 /* take the original parameters */ 1799 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1800 sdata_err(sdata, 1801 "failed to set TX queue parameters for queue %d\n", 1802 ac); 1803 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1804 tx_tspec->downgraded = false; 1805 ret = true; 1806 break; 1807 case TX_TSPEC_ACTION_DOWNGRADE: 1808 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1809 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1810 ret = true; 1811 break; 1812 } 1813 /* downgrade next lower non-ACM AC */ 1814 for (non_acm_ac = ac + 1; 1815 non_acm_ac < IEEE80211_NUM_ACS; 1816 non_acm_ac++) 1817 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1818 break; 1819 /* Usually the loop will result in using BK even if it 1820 * requires admission control, but such a configuration 1821 * makes no sense and we have to transmit somehow - the 1822 * AC selection does the same thing. 1823 * If we started out trying to downgrade from BK, then 1824 * the extra condition here might be needed. 1825 */ 1826 if (non_acm_ac >= IEEE80211_NUM_ACS) 1827 non_acm_ac = IEEE80211_AC_BK; 1828 if (drv_conf_tx(local, sdata, ac, 1829 &sdata->tx_conf[non_acm_ac])) 1830 sdata_err(sdata, 1831 "failed to set TX queue parameters for queue %d\n", 1832 ac); 1833 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1834 ret = true; 1835 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1836 tx_tspec->time_slice_start + HZ - now + 1); 1837 break; 1838 case TX_TSPEC_ACTION_NONE: 1839 /* nothing now */ 1840 break; 1841 } 1842 } 1843 1844 return ret; 1845 } 1846 1847 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1848 { 1849 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1850 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1851 } 1852 1853 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1854 { 1855 struct ieee80211_sub_if_data *sdata; 1856 1857 sdata = container_of(work, struct ieee80211_sub_if_data, 1858 u.mgd.tx_tspec_wk.work); 1859 ieee80211_sta_handle_tspec_ac_params(sdata); 1860 } 1861 1862 /* MLME */ 1863 static bool 1864 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1865 struct ieee80211_sub_if_data *sdata, 1866 const u8 *wmm_param, size_t wmm_param_len, 1867 const struct ieee80211_mu_edca_param_set *mu_edca) 1868 { 1869 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1871 size_t left; 1872 int count, ac; 1873 const u8 *pos; 1874 u8 uapsd_queues = 0; 1875 1876 if (!local->ops->conf_tx) 1877 return false; 1878 1879 if (local->hw.queues < IEEE80211_NUM_ACS) 1880 return false; 1881 1882 if (!wmm_param) 1883 return false; 1884 1885 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1886 return false; 1887 1888 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1889 uapsd_queues = ifmgd->uapsd_queues; 1890 1891 count = wmm_param[6] & 0x0f; 1892 if (count == ifmgd->wmm_last_param_set) 1893 return false; 1894 ifmgd->wmm_last_param_set = count; 1895 1896 pos = wmm_param + 8; 1897 left = wmm_param_len - 8; 1898 1899 memset(¶ms, 0, sizeof(params)); 1900 1901 sdata->wmm_acm = 0; 1902 for (; left >= 4; left -= 4, pos += 4) { 1903 int aci = (pos[0] >> 5) & 0x03; 1904 int acm = (pos[0] >> 4) & 0x01; 1905 bool uapsd = false; 1906 1907 switch (aci) { 1908 case 1: /* AC_BK */ 1909 ac = IEEE80211_AC_BK; 1910 if (acm) 1911 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1912 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1913 uapsd = true; 1914 params[ac].mu_edca = !!mu_edca; 1915 if (mu_edca) 1916 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1917 break; 1918 case 2: /* AC_VI */ 1919 ac = IEEE80211_AC_VI; 1920 if (acm) 1921 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1922 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1923 uapsd = true; 1924 params[ac].mu_edca = !!mu_edca; 1925 if (mu_edca) 1926 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1927 break; 1928 case 3: /* AC_VO */ 1929 ac = IEEE80211_AC_VO; 1930 if (acm) 1931 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1932 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1933 uapsd = true; 1934 params[ac].mu_edca = !!mu_edca; 1935 if (mu_edca) 1936 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 1937 break; 1938 case 0: /* AC_BE */ 1939 default: 1940 ac = IEEE80211_AC_BE; 1941 if (acm) 1942 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1943 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1944 uapsd = true; 1945 params[ac].mu_edca = !!mu_edca; 1946 if (mu_edca) 1947 params[ac].mu_edca_param_rec = mu_edca->ac_be; 1948 break; 1949 } 1950 1951 params[ac].aifs = pos[0] & 0x0f; 1952 1953 if (params[ac].aifs < 2) { 1954 sdata_info(sdata, 1955 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1956 params[ac].aifs, aci); 1957 params[ac].aifs = 2; 1958 } 1959 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1960 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1961 params[ac].txop = get_unaligned_le16(pos + 2); 1962 params[ac].acm = acm; 1963 params[ac].uapsd = uapsd; 1964 1965 if (params[ac].cw_min == 0 || 1966 params[ac].cw_min > params[ac].cw_max) { 1967 sdata_info(sdata, 1968 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1969 params[ac].cw_min, params[ac].cw_max, aci); 1970 return false; 1971 } 1972 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 1973 } 1974 1975 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1976 mlme_dbg(sdata, 1977 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1978 ac, params[ac].acm, 1979 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1980 params[ac].txop, params[ac].uapsd, 1981 ifmgd->tx_tspec[ac].downgraded); 1982 sdata->tx_conf[ac] = params[ac]; 1983 if (!ifmgd->tx_tspec[ac].downgraded && 1984 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1985 sdata_err(sdata, 1986 "failed to set TX queue parameters for AC %d\n", 1987 ac); 1988 } 1989 1990 /* enable WMM or activate new settings */ 1991 sdata->vif.bss_conf.qos = true; 1992 return true; 1993 } 1994 1995 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1996 { 1997 lockdep_assert_held(&sdata->local->mtx); 1998 1999 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2000 ieee80211_run_deferred_scan(sdata->local); 2001 } 2002 2003 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2004 { 2005 mutex_lock(&sdata->local->mtx); 2006 __ieee80211_stop_poll(sdata); 2007 mutex_unlock(&sdata->local->mtx); 2008 } 2009 2010 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2011 u16 capab, bool erp_valid, u8 erp) 2012 { 2013 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2014 struct ieee80211_supported_band *sband; 2015 u32 changed = 0; 2016 bool use_protection; 2017 bool use_short_preamble; 2018 bool use_short_slot; 2019 2020 sband = ieee80211_get_sband(sdata); 2021 if (!sband) 2022 return changed; 2023 2024 if (erp_valid) { 2025 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2026 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2027 } else { 2028 use_protection = false; 2029 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2030 } 2031 2032 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2033 if (sband->band == NL80211_BAND_5GHZ) 2034 use_short_slot = true; 2035 2036 if (use_protection != bss_conf->use_cts_prot) { 2037 bss_conf->use_cts_prot = use_protection; 2038 changed |= BSS_CHANGED_ERP_CTS_PROT; 2039 } 2040 2041 if (use_short_preamble != bss_conf->use_short_preamble) { 2042 bss_conf->use_short_preamble = use_short_preamble; 2043 changed |= BSS_CHANGED_ERP_PREAMBLE; 2044 } 2045 2046 if (use_short_slot != bss_conf->use_short_slot) { 2047 bss_conf->use_short_slot = use_short_slot; 2048 changed |= BSS_CHANGED_ERP_SLOT; 2049 } 2050 2051 return changed; 2052 } 2053 2054 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2055 struct cfg80211_bss *cbss, 2056 u32 bss_info_changed) 2057 { 2058 struct ieee80211_bss *bss = (void *)cbss->priv; 2059 struct ieee80211_local *local = sdata->local; 2060 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2061 2062 bss_info_changed |= BSS_CHANGED_ASSOC; 2063 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2064 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2065 2066 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2067 beacon_loss_count * bss_conf->beacon_int)); 2068 2069 sdata->u.mgd.associated = cbss; 2070 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2071 2072 ieee80211_check_rate_mask(sdata); 2073 2074 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2075 2076 if (sdata->vif.p2p || 2077 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2078 const struct cfg80211_bss_ies *ies; 2079 2080 rcu_read_lock(); 2081 ies = rcu_dereference(cbss->ies); 2082 if (ies) { 2083 int ret; 2084 2085 ret = cfg80211_get_p2p_attr( 2086 ies->data, ies->len, 2087 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2088 (u8 *) &bss_conf->p2p_noa_attr, 2089 sizeof(bss_conf->p2p_noa_attr)); 2090 if (ret >= 2) { 2091 sdata->u.mgd.p2p_noa_index = 2092 bss_conf->p2p_noa_attr.index; 2093 bss_info_changed |= BSS_CHANGED_P2P_PS; 2094 } 2095 } 2096 rcu_read_unlock(); 2097 } 2098 2099 /* just to be sure */ 2100 ieee80211_stop_poll(sdata); 2101 2102 ieee80211_led_assoc(local, 1); 2103 2104 if (sdata->u.mgd.have_beacon) { 2105 /* 2106 * If the AP is buggy we may get here with no DTIM period 2107 * known, so assume it's 1 which is the only safe assumption 2108 * in that case, although if the TIM IE is broken powersave 2109 * probably just won't work at all. 2110 */ 2111 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2112 bss_conf->beacon_rate = bss->beacon_rate; 2113 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2114 } else { 2115 bss_conf->beacon_rate = NULL; 2116 bss_conf->dtim_period = 0; 2117 } 2118 2119 bss_conf->assoc = 1; 2120 2121 /* Tell the driver to monitor connection quality (if supported) */ 2122 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2123 bss_conf->cqm_rssi_thold) 2124 bss_info_changed |= BSS_CHANGED_CQM; 2125 2126 /* Enable ARP filtering */ 2127 if (bss_conf->arp_addr_cnt) 2128 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2129 2130 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2131 2132 mutex_lock(&local->iflist_mtx); 2133 ieee80211_recalc_ps(local); 2134 mutex_unlock(&local->iflist_mtx); 2135 2136 ieee80211_recalc_smps(sdata); 2137 ieee80211_recalc_ps_vif(sdata); 2138 2139 netif_carrier_on(sdata->dev); 2140 } 2141 2142 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2143 u16 stype, u16 reason, bool tx, 2144 u8 *frame_buf) 2145 { 2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2147 struct ieee80211_local *local = sdata->local; 2148 u32 changed = 0; 2149 2150 sdata_assert_lock(sdata); 2151 2152 if (WARN_ON_ONCE(tx && !frame_buf)) 2153 return; 2154 2155 if (WARN_ON(!ifmgd->associated)) 2156 return; 2157 2158 ieee80211_stop_poll(sdata); 2159 2160 ifmgd->associated = NULL; 2161 netif_carrier_off(sdata->dev); 2162 2163 /* 2164 * if we want to get out of ps before disassoc (why?) we have 2165 * to do it before sending disassoc, as otherwise the null-packet 2166 * won't be valid. 2167 */ 2168 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2169 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2170 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2171 } 2172 local->ps_sdata = NULL; 2173 2174 /* disable per-vif ps */ 2175 ieee80211_recalc_ps_vif(sdata); 2176 2177 /* make sure ongoing transmission finishes */ 2178 synchronize_net(); 2179 2180 /* 2181 * drop any frame before deauth/disassoc, this can be data or 2182 * management frame. Since we are disconnecting, we should not 2183 * insist sending these frames which can take time and delay 2184 * the disconnection and possible the roaming. 2185 */ 2186 if (tx) 2187 ieee80211_flush_queues(local, sdata, true); 2188 2189 /* deauthenticate/disassociate now */ 2190 if (tx || frame_buf) { 2191 /* 2192 * In multi channel scenarios guarantee that the virtual 2193 * interface is granted immediate airtime to transmit the 2194 * deauthentication frame by calling mgd_prepare_tx, if the 2195 * driver requested so. 2196 */ 2197 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2198 !ifmgd->have_beacon) 2199 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2200 2201 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2202 reason, tx, frame_buf); 2203 } 2204 2205 /* flush out frame - make sure the deauth was actually sent */ 2206 if (tx) 2207 ieee80211_flush_queues(local, sdata, false); 2208 2209 /* clear bssid only after building the needed mgmt frames */ 2210 eth_zero_addr(ifmgd->bssid); 2211 2212 /* remove AP and TDLS peers */ 2213 sta_info_flush(sdata); 2214 2215 /* finally reset all BSS / config parameters */ 2216 changed |= ieee80211_reset_erp_info(sdata); 2217 2218 ieee80211_led_assoc(local, 0); 2219 changed |= BSS_CHANGED_ASSOC; 2220 sdata->vif.bss_conf.assoc = false; 2221 2222 ifmgd->p2p_noa_index = -1; 2223 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2224 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2225 2226 /* on the next assoc, re-program HT/VHT parameters */ 2227 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2228 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2229 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2230 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2231 2232 /* reset MU-MIMO ownership and group data */ 2233 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2234 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2235 memset(sdata->vif.bss_conf.mu_group.position, 0, 2236 sizeof(sdata->vif.bss_conf.mu_group.position)); 2237 changed |= BSS_CHANGED_MU_GROUPS; 2238 sdata->vif.mu_mimo_owner = false; 2239 2240 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2241 2242 del_timer_sync(&local->dynamic_ps_timer); 2243 cancel_work_sync(&local->dynamic_ps_enable_work); 2244 2245 /* Disable ARP filtering */ 2246 if (sdata->vif.bss_conf.arp_addr_cnt) 2247 changed |= BSS_CHANGED_ARP_FILTER; 2248 2249 sdata->vif.bss_conf.qos = false; 2250 changed |= BSS_CHANGED_QOS; 2251 2252 /* The BSSID (not really interesting) and HT changed */ 2253 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2254 ieee80211_bss_info_change_notify(sdata, changed); 2255 2256 /* disassociated - set to defaults now */ 2257 ieee80211_set_wmm_default(sdata, false, false); 2258 2259 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2260 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2261 del_timer_sync(&sdata->u.mgd.timer); 2262 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2263 2264 sdata->vif.bss_conf.dtim_period = 0; 2265 sdata->vif.bss_conf.beacon_rate = NULL; 2266 2267 ifmgd->have_beacon = false; 2268 2269 ifmgd->flags = 0; 2270 mutex_lock(&local->mtx); 2271 ieee80211_vif_release_channel(sdata); 2272 2273 sdata->vif.csa_active = false; 2274 ifmgd->csa_waiting_bcn = false; 2275 ifmgd->csa_ignored_same_chan = false; 2276 if (sdata->csa_block_tx) { 2277 ieee80211_wake_vif_queues(local, sdata, 2278 IEEE80211_QUEUE_STOP_REASON_CSA); 2279 sdata->csa_block_tx = false; 2280 } 2281 mutex_unlock(&local->mtx); 2282 2283 /* existing TX TSPEC sessions no longer exist */ 2284 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2285 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2286 2287 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2288 } 2289 2290 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2291 struct ieee80211_hdr *hdr) 2292 { 2293 /* 2294 * We can postpone the mgd.timer whenever receiving unicast frames 2295 * from AP because we know that the connection is working both ways 2296 * at that time. But multicast frames (and hence also beacons) must 2297 * be ignored here, because we need to trigger the timer during 2298 * data idle periods for sending the periodic probe request to the 2299 * AP we're connected to. 2300 */ 2301 if (is_multicast_ether_addr(hdr->addr1)) 2302 return; 2303 2304 ieee80211_sta_reset_conn_monitor(sdata); 2305 } 2306 2307 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2308 { 2309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2310 struct ieee80211_local *local = sdata->local; 2311 2312 mutex_lock(&local->mtx); 2313 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2314 goto out; 2315 2316 __ieee80211_stop_poll(sdata); 2317 2318 mutex_lock(&local->iflist_mtx); 2319 ieee80211_recalc_ps(local); 2320 mutex_unlock(&local->iflist_mtx); 2321 2322 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2323 goto out; 2324 2325 /* 2326 * We've received a probe response, but are not sure whether 2327 * we have or will be receiving any beacons or data, so let's 2328 * schedule the timers again, just in case. 2329 */ 2330 ieee80211_sta_reset_beacon_monitor(sdata); 2331 2332 mod_timer(&ifmgd->conn_mon_timer, 2333 round_jiffies_up(jiffies + 2334 IEEE80211_CONNECTION_IDLE_TIME)); 2335 out: 2336 mutex_unlock(&local->mtx); 2337 } 2338 2339 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2340 struct ieee80211_hdr *hdr, 2341 u16 tx_time) 2342 { 2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2344 u16 tid = ieee80211_get_tid(hdr); 2345 int ac = ieee80211_ac_from_tid(tid); 2346 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2347 unsigned long now = jiffies; 2348 2349 if (likely(!tx_tspec->admitted_time)) 2350 return; 2351 2352 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2353 tx_tspec->consumed_tx_time = 0; 2354 tx_tspec->time_slice_start = now; 2355 2356 if (tx_tspec->downgraded) { 2357 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2358 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2359 } 2360 } 2361 2362 if (tx_tspec->downgraded) 2363 return; 2364 2365 tx_tspec->consumed_tx_time += tx_time; 2366 2367 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2368 tx_tspec->downgraded = true; 2369 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2370 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2371 } 2372 } 2373 2374 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2375 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2376 { 2377 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2378 2379 if (!ieee80211_is_data(hdr->frame_control)) 2380 return; 2381 2382 if (ieee80211_is_nullfunc(hdr->frame_control) && 2383 sdata->u.mgd.probe_send_count > 0) { 2384 if (ack) 2385 ieee80211_sta_reset_conn_monitor(sdata); 2386 else 2387 sdata->u.mgd.nullfunc_failed = true; 2388 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2389 return; 2390 } 2391 2392 if (ack) 2393 ieee80211_sta_reset_conn_monitor(sdata); 2394 } 2395 2396 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2397 const u8 *src, const u8 *dst, 2398 const u8 *ssid, size_t ssid_len, 2399 struct ieee80211_channel *channel) 2400 { 2401 struct sk_buff *skb; 2402 2403 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2404 ssid, ssid_len, NULL, 0, 2405 IEEE80211_PROBE_FLAG_DIRECTED); 2406 if (skb) 2407 ieee80211_tx_skb(sdata, skb); 2408 } 2409 2410 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2411 { 2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2413 const u8 *ssid; 2414 u8 *dst = ifmgd->associated->bssid; 2415 u8 unicast_limit = max(1, max_probe_tries - 3); 2416 struct sta_info *sta; 2417 2418 /* 2419 * Try sending broadcast probe requests for the last three 2420 * probe requests after the first ones failed since some 2421 * buggy APs only support broadcast probe requests. 2422 */ 2423 if (ifmgd->probe_send_count >= unicast_limit) 2424 dst = NULL; 2425 2426 /* 2427 * When the hardware reports an accurate Tx ACK status, it's 2428 * better to send a nullfunc frame instead of a probe request, 2429 * as it will kick us off the AP quickly if we aren't associated 2430 * anymore. The timeout will be reset if the frame is ACKed by 2431 * the AP. 2432 */ 2433 ifmgd->probe_send_count++; 2434 2435 if (dst) { 2436 mutex_lock(&sdata->local->sta_mtx); 2437 sta = sta_info_get(sdata, dst); 2438 if (!WARN_ON(!sta)) 2439 ieee80211_check_fast_rx(sta); 2440 mutex_unlock(&sdata->local->sta_mtx); 2441 } 2442 2443 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2444 ifmgd->nullfunc_failed = false; 2445 ieee80211_send_nullfunc(sdata->local, sdata, false); 2446 } else { 2447 int ssid_len; 2448 2449 rcu_read_lock(); 2450 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2451 if (WARN_ON_ONCE(ssid == NULL)) 2452 ssid_len = 0; 2453 else 2454 ssid_len = ssid[1]; 2455 2456 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2457 ssid + 2, ssid_len, 2458 ifmgd->associated->channel); 2459 rcu_read_unlock(); 2460 } 2461 2462 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2463 run_again(sdata, ifmgd->probe_timeout); 2464 } 2465 2466 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2467 bool beacon) 2468 { 2469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2470 bool already = false; 2471 2472 if (!ieee80211_sdata_running(sdata)) 2473 return; 2474 2475 sdata_lock(sdata); 2476 2477 if (!ifmgd->associated) 2478 goto out; 2479 2480 mutex_lock(&sdata->local->mtx); 2481 2482 if (sdata->local->tmp_channel || sdata->local->scanning) { 2483 mutex_unlock(&sdata->local->mtx); 2484 goto out; 2485 } 2486 2487 if (beacon) { 2488 mlme_dbg_ratelimited(sdata, 2489 "detected beacon loss from AP (missed %d beacons) - probing\n", 2490 beacon_loss_count); 2491 2492 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2493 } 2494 2495 /* 2496 * The driver/our work has already reported this event or the 2497 * connection monitoring has kicked in and we have already sent 2498 * a probe request. Or maybe the AP died and the driver keeps 2499 * reporting until we disassociate... 2500 * 2501 * In either case we have to ignore the current call to this 2502 * function (except for setting the correct probe reason bit) 2503 * because otherwise we would reset the timer every time and 2504 * never check whether we received a probe response! 2505 */ 2506 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2507 already = true; 2508 2509 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2510 2511 mutex_unlock(&sdata->local->mtx); 2512 2513 if (already) 2514 goto out; 2515 2516 mutex_lock(&sdata->local->iflist_mtx); 2517 ieee80211_recalc_ps(sdata->local); 2518 mutex_unlock(&sdata->local->iflist_mtx); 2519 2520 ifmgd->probe_send_count = 0; 2521 ieee80211_mgd_probe_ap_send(sdata); 2522 out: 2523 sdata_unlock(sdata); 2524 } 2525 2526 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2527 struct ieee80211_vif *vif) 2528 { 2529 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2531 struct cfg80211_bss *cbss; 2532 struct sk_buff *skb; 2533 const u8 *ssid; 2534 int ssid_len; 2535 2536 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2537 return NULL; 2538 2539 sdata_assert_lock(sdata); 2540 2541 if (ifmgd->associated) 2542 cbss = ifmgd->associated; 2543 else if (ifmgd->auth_data) 2544 cbss = ifmgd->auth_data->bss; 2545 else if (ifmgd->assoc_data) 2546 cbss = ifmgd->assoc_data->bss; 2547 else 2548 return NULL; 2549 2550 rcu_read_lock(); 2551 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2552 if (WARN_ON_ONCE(ssid == NULL)) 2553 ssid_len = 0; 2554 else 2555 ssid_len = ssid[1]; 2556 2557 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2558 (u32) -1, cbss->channel, 2559 ssid + 2, ssid_len, 2560 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2561 rcu_read_unlock(); 2562 2563 return skb; 2564 } 2565 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2566 2567 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2568 const u8 *buf, size_t len, bool tx, 2569 u16 reason) 2570 { 2571 struct ieee80211_event event = { 2572 .type = MLME_EVENT, 2573 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2574 .u.mlme.reason = reason, 2575 }; 2576 2577 if (tx) 2578 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2579 else 2580 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2581 2582 drv_event_callback(sdata->local, sdata, &event); 2583 } 2584 2585 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2586 { 2587 struct ieee80211_local *local = sdata->local; 2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2589 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2590 bool tx; 2591 2592 sdata_lock(sdata); 2593 if (!ifmgd->associated) { 2594 sdata_unlock(sdata); 2595 return; 2596 } 2597 2598 tx = !sdata->csa_block_tx; 2599 2600 /* AP is probably out of range (or not reachable for another reason) so 2601 * remove the bss struct for that AP. 2602 */ 2603 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2604 2605 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2606 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2607 tx, frame_buf); 2608 mutex_lock(&local->mtx); 2609 sdata->vif.csa_active = false; 2610 ifmgd->csa_waiting_bcn = false; 2611 if (sdata->csa_block_tx) { 2612 ieee80211_wake_vif_queues(local, sdata, 2613 IEEE80211_QUEUE_STOP_REASON_CSA); 2614 sdata->csa_block_tx = false; 2615 } 2616 mutex_unlock(&local->mtx); 2617 2618 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2619 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2620 2621 sdata_unlock(sdata); 2622 } 2623 2624 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2625 { 2626 struct ieee80211_sub_if_data *sdata = 2627 container_of(work, struct ieee80211_sub_if_data, 2628 u.mgd.beacon_connection_loss_work); 2629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2630 2631 if (ifmgd->associated) 2632 ifmgd->beacon_loss_count++; 2633 2634 if (ifmgd->connection_loss) { 2635 sdata_info(sdata, "Connection to AP %pM lost\n", 2636 ifmgd->bssid); 2637 __ieee80211_disconnect(sdata); 2638 } else { 2639 ieee80211_mgd_probe_ap(sdata, true); 2640 } 2641 } 2642 2643 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2644 { 2645 struct ieee80211_sub_if_data *sdata = 2646 container_of(work, struct ieee80211_sub_if_data, 2647 u.mgd.csa_connection_drop_work); 2648 2649 __ieee80211_disconnect(sdata); 2650 } 2651 2652 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2653 { 2654 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2655 struct ieee80211_hw *hw = &sdata->local->hw; 2656 2657 trace_api_beacon_loss(sdata); 2658 2659 sdata->u.mgd.connection_loss = false; 2660 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2661 } 2662 EXPORT_SYMBOL(ieee80211_beacon_loss); 2663 2664 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2665 { 2666 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2667 struct ieee80211_hw *hw = &sdata->local->hw; 2668 2669 trace_api_connection_loss(sdata); 2670 2671 sdata->u.mgd.connection_loss = true; 2672 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2673 } 2674 EXPORT_SYMBOL(ieee80211_connection_loss); 2675 2676 2677 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2678 bool assoc) 2679 { 2680 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2681 2682 sdata_assert_lock(sdata); 2683 2684 if (!assoc) { 2685 /* 2686 * we are not authenticated yet, the only timer that could be 2687 * running is the timeout for the authentication response which 2688 * which is not relevant anymore. 2689 */ 2690 del_timer_sync(&sdata->u.mgd.timer); 2691 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2692 2693 eth_zero_addr(sdata->u.mgd.bssid); 2694 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2695 sdata->u.mgd.flags = 0; 2696 mutex_lock(&sdata->local->mtx); 2697 ieee80211_vif_release_channel(sdata); 2698 mutex_unlock(&sdata->local->mtx); 2699 } 2700 2701 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2702 kfree(auth_data); 2703 sdata->u.mgd.auth_data = NULL; 2704 } 2705 2706 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2707 bool assoc, bool abandon) 2708 { 2709 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2710 2711 sdata_assert_lock(sdata); 2712 2713 if (!assoc) { 2714 /* 2715 * we are not associated yet, the only timer that could be 2716 * running is the timeout for the association response which 2717 * which is not relevant anymore. 2718 */ 2719 del_timer_sync(&sdata->u.mgd.timer); 2720 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2721 2722 eth_zero_addr(sdata->u.mgd.bssid); 2723 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2724 sdata->u.mgd.flags = 0; 2725 sdata->vif.mu_mimo_owner = false; 2726 2727 mutex_lock(&sdata->local->mtx); 2728 ieee80211_vif_release_channel(sdata); 2729 mutex_unlock(&sdata->local->mtx); 2730 2731 if (abandon) 2732 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2733 } 2734 2735 kfree(assoc_data); 2736 sdata->u.mgd.assoc_data = NULL; 2737 } 2738 2739 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2740 struct ieee80211_mgmt *mgmt, size_t len) 2741 { 2742 struct ieee80211_local *local = sdata->local; 2743 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2744 u8 *pos; 2745 struct ieee802_11_elems elems; 2746 u32 tx_flags = 0; 2747 2748 pos = mgmt->u.auth.variable; 2749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2750 if (!elems.challenge) 2751 return; 2752 auth_data->expected_transaction = 4; 2753 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2756 IEEE80211_TX_INTFL_MLME_CONN_TX; 2757 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2758 elems.challenge - 2, elems.challenge_len + 2, 2759 auth_data->bss->bssid, auth_data->bss->bssid, 2760 auth_data->key, auth_data->key_len, 2761 auth_data->key_idx, tx_flags); 2762 } 2763 2764 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2765 struct ieee80211_mgmt *mgmt, size_t len) 2766 { 2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2768 u8 bssid[ETH_ALEN]; 2769 u16 auth_alg, auth_transaction, status_code; 2770 struct sta_info *sta; 2771 struct ieee80211_event event = { 2772 .type = MLME_EVENT, 2773 .u.mlme.data = AUTH_EVENT, 2774 }; 2775 2776 sdata_assert_lock(sdata); 2777 2778 if (len < 24 + 6) 2779 return; 2780 2781 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2782 return; 2783 2784 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2785 2786 if (!ether_addr_equal(bssid, mgmt->bssid)) 2787 return; 2788 2789 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2790 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2791 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2792 2793 if (auth_alg != ifmgd->auth_data->algorithm || 2794 auth_transaction != ifmgd->auth_data->expected_transaction) { 2795 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2796 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2797 auth_transaction, 2798 ifmgd->auth_data->expected_transaction); 2799 return; 2800 } 2801 2802 if (status_code != WLAN_STATUS_SUCCESS) { 2803 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2804 mgmt->sa, status_code); 2805 ieee80211_destroy_auth_data(sdata, false); 2806 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2807 event.u.mlme.status = MLME_DENIED; 2808 event.u.mlme.reason = status_code; 2809 drv_event_callback(sdata->local, sdata, &event); 2810 return; 2811 } 2812 2813 switch (ifmgd->auth_data->algorithm) { 2814 case WLAN_AUTH_OPEN: 2815 case WLAN_AUTH_LEAP: 2816 case WLAN_AUTH_FT: 2817 case WLAN_AUTH_SAE: 2818 case WLAN_AUTH_FILS_SK: 2819 case WLAN_AUTH_FILS_SK_PFS: 2820 case WLAN_AUTH_FILS_PK: 2821 break; 2822 case WLAN_AUTH_SHARED_KEY: 2823 if (ifmgd->auth_data->expected_transaction != 4) { 2824 ieee80211_auth_challenge(sdata, mgmt, len); 2825 /* need another frame */ 2826 return; 2827 } 2828 break; 2829 default: 2830 WARN_ONCE(1, "invalid auth alg %d", 2831 ifmgd->auth_data->algorithm); 2832 return; 2833 } 2834 2835 event.u.mlme.status = MLME_SUCCESS; 2836 drv_event_callback(sdata->local, sdata, &event); 2837 sdata_info(sdata, "authenticated\n"); 2838 ifmgd->auth_data->done = true; 2839 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2840 ifmgd->auth_data->timeout_started = true; 2841 run_again(sdata, ifmgd->auth_data->timeout); 2842 2843 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2844 ifmgd->auth_data->expected_transaction != 2) { 2845 /* 2846 * Report auth frame to user space for processing since another 2847 * round of Authentication frames is still needed. 2848 */ 2849 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2850 return; 2851 } 2852 2853 /* move station state to auth */ 2854 mutex_lock(&sdata->local->sta_mtx); 2855 sta = sta_info_get(sdata, bssid); 2856 if (!sta) { 2857 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2858 goto out_err; 2859 } 2860 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2861 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2862 goto out_err; 2863 } 2864 mutex_unlock(&sdata->local->sta_mtx); 2865 2866 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2867 return; 2868 out_err: 2869 mutex_unlock(&sdata->local->sta_mtx); 2870 /* ignore frame -- wait for timeout */ 2871 } 2872 2873 #define case_WLAN(type) \ 2874 case WLAN_REASON_##type: return #type 2875 2876 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2877 { 2878 switch (reason_code) { 2879 case_WLAN(UNSPECIFIED); 2880 case_WLAN(PREV_AUTH_NOT_VALID); 2881 case_WLAN(DEAUTH_LEAVING); 2882 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2883 case_WLAN(DISASSOC_AP_BUSY); 2884 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2885 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2886 case_WLAN(DISASSOC_STA_HAS_LEFT); 2887 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2888 case_WLAN(DISASSOC_BAD_POWER); 2889 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2890 case_WLAN(INVALID_IE); 2891 case_WLAN(MIC_FAILURE); 2892 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2893 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2894 case_WLAN(IE_DIFFERENT); 2895 case_WLAN(INVALID_GROUP_CIPHER); 2896 case_WLAN(INVALID_PAIRWISE_CIPHER); 2897 case_WLAN(INVALID_AKMP); 2898 case_WLAN(UNSUPP_RSN_VERSION); 2899 case_WLAN(INVALID_RSN_IE_CAP); 2900 case_WLAN(IEEE8021X_FAILED); 2901 case_WLAN(CIPHER_SUITE_REJECTED); 2902 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2903 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2904 case_WLAN(DISASSOC_LOW_ACK); 2905 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2906 case_WLAN(QSTA_LEAVE_QBSS); 2907 case_WLAN(QSTA_NOT_USE); 2908 case_WLAN(QSTA_REQUIRE_SETUP); 2909 case_WLAN(QSTA_TIMEOUT); 2910 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2911 case_WLAN(MESH_PEER_CANCELED); 2912 case_WLAN(MESH_MAX_PEERS); 2913 case_WLAN(MESH_CONFIG); 2914 case_WLAN(MESH_CLOSE); 2915 case_WLAN(MESH_MAX_RETRIES); 2916 case_WLAN(MESH_CONFIRM_TIMEOUT); 2917 case_WLAN(MESH_INVALID_GTK); 2918 case_WLAN(MESH_INCONSISTENT_PARAM); 2919 case_WLAN(MESH_INVALID_SECURITY); 2920 case_WLAN(MESH_PATH_ERROR); 2921 case_WLAN(MESH_PATH_NOFORWARD); 2922 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2923 case_WLAN(MAC_EXISTS_IN_MBSS); 2924 case_WLAN(MESH_CHAN_REGULATORY); 2925 case_WLAN(MESH_CHAN); 2926 default: return "<unknown>"; 2927 } 2928 } 2929 2930 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2931 struct ieee80211_mgmt *mgmt, size_t len) 2932 { 2933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2934 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2935 2936 sdata_assert_lock(sdata); 2937 2938 if (len < 24 + 2) 2939 return; 2940 2941 if (ifmgd->associated && 2942 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2943 const u8 *bssid = ifmgd->associated->bssid; 2944 2945 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2946 bssid, reason_code, 2947 ieee80211_get_reason_code_string(reason_code)); 2948 2949 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2950 2951 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2952 reason_code); 2953 return; 2954 } 2955 2956 if (ifmgd->assoc_data && 2957 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2958 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2959 2960 sdata_info(sdata, 2961 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2962 bssid, reason_code, 2963 ieee80211_get_reason_code_string(reason_code)); 2964 2965 ieee80211_destroy_assoc_data(sdata, false, true); 2966 2967 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2968 return; 2969 } 2970 } 2971 2972 2973 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2974 struct ieee80211_mgmt *mgmt, size_t len) 2975 { 2976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2977 u16 reason_code; 2978 2979 sdata_assert_lock(sdata); 2980 2981 if (len < 24 + 2) 2982 return; 2983 2984 if (!ifmgd->associated || 2985 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2986 return; 2987 2988 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2989 2990 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2991 mgmt->sa, reason_code, 2992 ieee80211_get_reason_code_string(reason_code)); 2993 2994 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2995 2996 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2997 } 2998 2999 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3000 u8 *supp_rates, unsigned int supp_rates_len, 3001 u32 *rates, u32 *basic_rates, 3002 bool *have_higher_than_11mbit, 3003 int *min_rate, int *min_rate_index, 3004 int shift) 3005 { 3006 int i, j; 3007 3008 for (i = 0; i < supp_rates_len; i++) { 3009 int rate = supp_rates[i] & 0x7f; 3010 bool is_basic = !!(supp_rates[i] & 0x80); 3011 3012 if ((rate * 5 * (1 << shift)) > 110) 3013 *have_higher_than_11mbit = true; 3014 3015 /* 3016 * Skip HT and VHT BSS membership selectors since they're not 3017 * rates. 3018 * 3019 * Note: Even though the membership selector and the basic 3020 * rate flag share the same bit, they are not exactly 3021 * the same. 3022 */ 3023 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3024 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3025 continue; 3026 3027 for (j = 0; j < sband->n_bitrates; j++) { 3028 struct ieee80211_rate *br; 3029 int brate; 3030 3031 br = &sband->bitrates[j]; 3032 3033 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3034 if (brate == rate) { 3035 *rates |= BIT(j); 3036 if (is_basic) 3037 *basic_rates |= BIT(j); 3038 if ((rate * 5) < *min_rate) { 3039 *min_rate = rate * 5; 3040 *min_rate_index = j; 3041 } 3042 break; 3043 } 3044 } 3045 } 3046 } 3047 3048 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3049 struct cfg80211_bss *cbss, 3050 struct ieee80211_mgmt *mgmt, size_t len) 3051 { 3052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3053 struct ieee80211_local *local = sdata->local; 3054 struct ieee80211_supported_band *sband; 3055 struct sta_info *sta; 3056 u8 *pos; 3057 u16 capab_info, aid; 3058 struct ieee802_11_elems elems; 3059 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3060 const struct cfg80211_bss_ies *bss_ies = NULL; 3061 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3062 u32 changed = 0; 3063 int err; 3064 bool ret; 3065 3066 /* AssocResp and ReassocResp have identical structure */ 3067 3068 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3069 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3070 3071 /* 3072 * The 5 MSB of the AID field are reserved 3073 * (802.11-2016 9.4.1.8 AID field) 3074 */ 3075 aid &= 0x7ff; 3076 3077 ifmgd->broken_ap = false; 3078 3079 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3080 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3081 aid); 3082 aid = 0; 3083 ifmgd->broken_ap = true; 3084 } 3085 3086 pos = mgmt->u.assoc_resp.variable; 3087 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3088 3089 if (!elems.supp_rates) { 3090 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3091 return false; 3092 } 3093 3094 ifmgd->aid = aid; 3095 ifmgd->tdls_chan_switch_prohibited = 3096 elems.ext_capab && elems.ext_capab_len >= 5 && 3097 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3098 3099 /* 3100 * Some APs are erroneously not including some information in their 3101 * (re)association response frames. Try to recover by using the data 3102 * from the beacon or probe response. This seems to afflict mobile 3103 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3104 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3105 */ 3106 if ((assoc_data->wmm && !elems.wmm_param) || 3107 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3108 (!elems.ht_cap_elem || !elems.ht_operation)) || 3109 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3110 (!elems.vht_cap_elem || !elems.vht_operation))) { 3111 const struct cfg80211_bss_ies *ies; 3112 struct ieee802_11_elems bss_elems; 3113 3114 rcu_read_lock(); 3115 ies = rcu_dereference(cbss->ies); 3116 if (ies) 3117 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3118 GFP_ATOMIC); 3119 rcu_read_unlock(); 3120 if (!bss_ies) 3121 return false; 3122 3123 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3124 false, &bss_elems); 3125 if (assoc_data->wmm && 3126 !elems.wmm_param && bss_elems.wmm_param) { 3127 elems.wmm_param = bss_elems.wmm_param; 3128 sdata_info(sdata, 3129 "AP bug: WMM param missing from AssocResp\n"); 3130 } 3131 3132 /* 3133 * Also check if we requested HT/VHT, otherwise the AP doesn't 3134 * have to include the IEs in the (re)association response. 3135 */ 3136 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3137 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3138 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3139 sdata_info(sdata, 3140 "AP bug: HT capability missing from AssocResp\n"); 3141 } 3142 if (!elems.ht_operation && bss_elems.ht_operation && 3143 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3144 elems.ht_operation = bss_elems.ht_operation; 3145 sdata_info(sdata, 3146 "AP bug: HT operation missing from AssocResp\n"); 3147 } 3148 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3149 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3150 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3151 sdata_info(sdata, 3152 "AP bug: VHT capa missing from AssocResp\n"); 3153 } 3154 if (!elems.vht_operation && bss_elems.vht_operation && 3155 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3156 elems.vht_operation = bss_elems.vht_operation; 3157 sdata_info(sdata, 3158 "AP bug: VHT operation missing from AssocResp\n"); 3159 } 3160 } 3161 3162 /* 3163 * We previously checked these in the beacon/probe response, so 3164 * they should be present here. This is just a safety net. 3165 */ 3166 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3167 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3168 sdata_info(sdata, 3169 "HT AP is missing WMM params or HT capability/operation\n"); 3170 ret = false; 3171 goto out; 3172 } 3173 3174 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3175 (!elems.vht_cap_elem || !elems.vht_operation)) { 3176 sdata_info(sdata, 3177 "VHT AP is missing VHT capability/operation\n"); 3178 ret = false; 3179 goto out; 3180 } 3181 3182 mutex_lock(&sdata->local->sta_mtx); 3183 /* 3184 * station info was already allocated and inserted before 3185 * the association and should be available to us 3186 */ 3187 sta = sta_info_get(sdata, cbss->bssid); 3188 if (WARN_ON(!sta)) { 3189 mutex_unlock(&sdata->local->sta_mtx); 3190 ret = false; 3191 goto out; 3192 } 3193 3194 sband = ieee80211_get_sband(sdata); 3195 if (!sband) { 3196 mutex_unlock(&sdata->local->sta_mtx); 3197 ret = false; 3198 goto out; 3199 } 3200 3201 /* 3202 * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark 3203 * HE as disabled. If on the 5GHz band, make sure it supports VHT. 3204 */ 3205 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 3206 (sband->band == NL80211_BAND_5GHZ && 3207 ifmgd->flags & IEEE80211_STA_DISABLE_VHT) || 3208 (!elems.he_cap && !elems.he_operation)) 3209 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 3210 3211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3212 (!elems.he_cap || !elems.he_operation)) { 3213 mutex_unlock(&sdata->local->sta_mtx); 3214 sdata_info(sdata, 3215 "HE AP is missing HE capability/operation\n"); 3216 ret = false; 3217 goto out; 3218 } 3219 3220 /* Set up internal HT/VHT capabilities */ 3221 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3222 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3223 elems.ht_cap_elem, sta); 3224 3225 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3226 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3227 elems.vht_cap_elem, sta); 3228 3229 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3230 elems.he_cap) { 3231 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3232 elems.he_cap, 3233 elems.he_cap_len, 3234 sta); 3235 3236 bss_conf->he_support = sta->sta.he_cap.has_he; 3237 } else { 3238 bss_conf->he_support = false; 3239 } 3240 3241 if (bss_conf->he_support) { 3242 bss_conf->bss_color = 3243 le32_get_bits(elems.he_operation->he_oper_params, 3244 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3245 3246 bss_conf->htc_trig_based_pkt_ext = 3247 le32_get_bits(elems.he_operation->he_oper_params, 3248 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3249 bss_conf->frame_time_rts_th = 3250 le32_get_bits(elems.he_operation->he_oper_params, 3251 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3252 3253 bss_conf->multi_sta_back_32bit = 3254 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3255 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3256 3257 bss_conf->ack_enabled = 3258 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3259 IEEE80211_HE_MAC_CAP2_ACK_EN; 3260 3261 bss_conf->uora_exists = !!elems.uora_element; 3262 if (elems.uora_element) 3263 bss_conf->uora_ocw_range = elems.uora_element[0]; 3264 3265 /* TODO: OPEN: what happens if BSS color disable is set? */ 3266 } 3267 3268 /* 3269 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3270 * in their association response, so ignore that data for our own 3271 * configuration. If it changed since the last beacon, we'll get the 3272 * next beacon and update then. 3273 */ 3274 3275 /* 3276 * If an operating mode notification IE is present, override the 3277 * NSS calculation (that would be done in rate_control_rate_init()) 3278 * and use the # of streams from that element. 3279 */ 3280 if (elems.opmode_notif && 3281 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3282 u8 nss; 3283 3284 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3285 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3286 nss += 1; 3287 sta->sta.rx_nss = nss; 3288 } 3289 3290 rate_control_rate_init(sta); 3291 3292 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3293 set_sta_flag(sta, WLAN_STA_MFP); 3294 sta->sta.mfp = true; 3295 } else { 3296 sta->sta.mfp = false; 3297 } 3298 3299 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3300 3301 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3302 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3303 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3304 if (err) { 3305 sdata_info(sdata, 3306 "failed to move station %pM to desired state\n", 3307 sta->sta.addr); 3308 WARN_ON(__sta_info_destroy(sta)); 3309 mutex_unlock(&sdata->local->sta_mtx); 3310 ret = false; 3311 goto out; 3312 } 3313 3314 mutex_unlock(&sdata->local->sta_mtx); 3315 3316 /* 3317 * Always handle WMM once after association regardless 3318 * of the first value the AP uses. Setting -1 here has 3319 * that effect because the AP values is an unsigned 3320 * 4-bit value. 3321 */ 3322 ifmgd->wmm_last_param_set = -1; 3323 3324 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3325 ieee80211_set_wmm_default(sdata, false, false); 3326 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3327 elems.wmm_param_len, 3328 elems.mu_edca_param_set)) { 3329 /* still enable QoS since we might have HT/VHT */ 3330 ieee80211_set_wmm_default(sdata, false, true); 3331 /* set the disable-WMM flag in this case to disable 3332 * tracking WMM parameter changes in the beacon if 3333 * the parameters weren't actually valid. Doing so 3334 * avoids changing parameters very strangely when 3335 * the AP is going back and forth between valid and 3336 * invalid parameters. 3337 */ 3338 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3339 } 3340 changed |= BSS_CHANGED_QOS; 3341 3342 if (elems.max_idle_period_ie) { 3343 bss_conf->max_idle_period = 3344 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3345 bss_conf->protected_keep_alive = 3346 !!(elems.max_idle_period_ie->idle_options & 3347 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3348 changed |= BSS_CHANGED_KEEP_ALIVE; 3349 } else { 3350 bss_conf->max_idle_period = 0; 3351 bss_conf->protected_keep_alive = false; 3352 } 3353 3354 /* set AID and assoc capability, 3355 * ieee80211_set_associated() will tell the driver */ 3356 bss_conf->aid = aid; 3357 bss_conf->assoc_capability = capab_info; 3358 ieee80211_set_associated(sdata, cbss, changed); 3359 3360 /* 3361 * If we're using 4-addr mode, let the AP know that we're 3362 * doing so, so that it can create the STA VLAN on its side 3363 */ 3364 if (ifmgd->use_4addr) 3365 ieee80211_send_4addr_nullfunc(local, sdata); 3366 3367 /* 3368 * Start timer to probe the connection to the AP now. 3369 * Also start the timer that will detect beacon loss. 3370 */ 3371 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3372 ieee80211_sta_reset_beacon_monitor(sdata); 3373 3374 ret = true; 3375 out: 3376 kfree(bss_ies); 3377 return ret; 3378 } 3379 3380 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3381 struct ieee80211_mgmt *mgmt, 3382 size_t len) 3383 { 3384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3385 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3386 u16 capab_info, status_code, aid; 3387 struct ieee802_11_elems elems; 3388 int ac, uapsd_queues = -1; 3389 u8 *pos; 3390 bool reassoc; 3391 struct cfg80211_bss *bss; 3392 struct ieee80211_event event = { 3393 .type = MLME_EVENT, 3394 .u.mlme.data = ASSOC_EVENT, 3395 }; 3396 3397 sdata_assert_lock(sdata); 3398 3399 if (!assoc_data) 3400 return; 3401 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3402 return; 3403 3404 /* 3405 * AssocResp and ReassocResp have identical structure, so process both 3406 * of them in this function. 3407 */ 3408 3409 if (len < 24 + 6) 3410 return; 3411 3412 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3413 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3414 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3415 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3416 3417 sdata_info(sdata, 3418 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3419 reassoc ? "Rea" : "A", mgmt->sa, 3420 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3421 3422 if (assoc_data->fils_kek_len && 3423 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3424 return; 3425 3426 pos = mgmt->u.assoc_resp.variable; 3427 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3428 3429 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3430 elems.timeout_int && 3431 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3432 u32 tu, ms; 3433 tu = le32_to_cpu(elems.timeout_int->value); 3434 ms = tu * 1024 / 1000; 3435 sdata_info(sdata, 3436 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3437 mgmt->sa, tu, ms); 3438 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3439 assoc_data->timeout_started = true; 3440 if (ms > IEEE80211_ASSOC_TIMEOUT) 3441 run_again(sdata, assoc_data->timeout); 3442 return; 3443 } 3444 3445 bss = assoc_data->bss; 3446 3447 if (status_code != WLAN_STATUS_SUCCESS) { 3448 sdata_info(sdata, "%pM denied association (code=%d)\n", 3449 mgmt->sa, status_code); 3450 ieee80211_destroy_assoc_data(sdata, false, false); 3451 event.u.mlme.status = MLME_DENIED; 3452 event.u.mlme.reason = status_code; 3453 drv_event_callback(sdata->local, sdata, &event); 3454 } else { 3455 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3456 /* oops -- internal error -- send timeout for now */ 3457 ieee80211_destroy_assoc_data(sdata, false, false); 3458 cfg80211_assoc_timeout(sdata->dev, bss); 3459 return; 3460 } 3461 event.u.mlme.status = MLME_SUCCESS; 3462 drv_event_callback(sdata->local, sdata, &event); 3463 sdata_info(sdata, "associated\n"); 3464 3465 /* 3466 * destroy assoc_data afterwards, as otherwise an idle 3467 * recalc after assoc_data is NULL but before associated 3468 * is set can cause the interface to go idle 3469 */ 3470 ieee80211_destroy_assoc_data(sdata, true, false); 3471 3472 /* get uapsd queues configuration */ 3473 uapsd_queues = 0; 3474 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3475 if (sdata->tx_conf[ac].uapsd) 3476 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3477 } 3478 3479 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3480 } 3481 3482 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3483 struct ieee80211_mgmt *mgmt, size_t len, 3484 struct ieee80211_rx_status *rx_status, 3485 struct ieee802_11_elems *elems) 3486 { 3487 struct ieee80211_local *local = sdata->local; 3488 struct ieee80211_bss *bss; 3489 struct ieee80211_channel *channel; 3490 3491 sdata_assert_lock(sdata); 3492 3493 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3494 if (!channel) 3495 return; 3496 3497 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3498 channel); 3499 if (bss) { 3500 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3501 ieee80211_rx_bss_put(local, bss); 3502 } 3503 } 3504 3505 3506 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3507 struct sk_buff *skb) 3508 { 3509 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3510 struct ieee80211_if_managed *ifmgd; 3511 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3512 size_t baselen, len = skb->len; 3513 struct ieee802_11_elems elems; 3514 3515 ifmgd = &sdata->u.mgd; 3516 3517 sdata_assert_lock(sdata); 3518 3519 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3520 return; /* ignore ProbeResp to foreign address */ 3521 3522 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3523 if (baselen > len) 3524 return; 3525 3526 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3527 false, &elems); 3528 3529 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3530 3531 if (ifmgd->associated && 3532 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3533 ieee80211_reset_ap_probe(sdata); 3534 } 3535 3536 /* 3537 * This is the canonical list of information elements we care about, 3538 * the filter code also gives us all changes to the Microsoft OUI 3539 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3540 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3541 * changes to requested client power. 3542 * 3543 * We implement beacon filtering in software since that means we can 3544 * avoid processing the frame here and in cfg80211, and userspace 3545 * will not be able to tell whether the hardware supports it or not. 3546 * 3547 * XXX: This list needs to be dynamic -- userspace needs to be able to 3548 * add items it requires. It also needs to be able to tell us to 3549 * look out for other vendor IEs. 3550 */ 3551 static const u64 care_about_ies = 3552 (1ULL << WLAN_EID_COUNTRY) | 3553 (1ULL << WLAN_EID_ERP_INFO) | 3554 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3555 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3556 (1ULL << WLAN_EID_HT_CAPABILITY) | 3557 (1ULL << WLAN_EID_HT_OPERATION) | 3558 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3559 3560 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3561 struct ieee80211_if_managed *ifmgd, 3562 struct ieee80211_bss_conf *bss_conf, 3563 struct ieee80211_local *local, 3564 struct ieee80211_rx_status *rx_status) 3565 { 3566 /* Track average RSSI from the Beacon frames of the current AP */ 3567 3568 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3569 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3570 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3571 ifmgd->last_cqm_event_signal = 0; 3572 ifmgd->count_beacon_signal = 1; 3573 ifmgd->last_ave_beacon_signal = 0; 3574 } else { 3575 ifmgd->count_beacon_signal++; 3576 } 3577 3578 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3579 3580 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3581 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3582 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3583 int last_sig = ifmgd->last_ave_beacon_signal; 3584 struct ieee80211_event event = { 3585 .type = RSSI_EVENT, 3586 }; 3587 3588 /* 3589 * if signal crosses either of the boundaries, invoke callback 3590 * with appropriate parameters 3591 */ 3592 if (sig > ifmgd->rssi_max_thold && 3593 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3594 ifmgd->last_ave_beacon_signal = sig; 3595 event.u.rssi.data = RSSI_EVENT_HIGH; 3596 drv_event_callback(local, sdata, &event); 3597 } else if (sig < ifmgd->rssi_min_thold && 3598 (last_sig >= ifmgd->rssi_max_thold || 3599 last_sig == 0)) { 3600 ifmgd->last_ave_beacon_signal = sig; 3601 event.u.rssi.data = RSSI_EVENT_LOW; 3602 drv_event_callback(local, sdata, &event); 3603 } 3604 } 3605 3606 if (bss_conf->cqm_rssi_thold && 3607 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3608 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3609 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3610 int last_event = ifmgd->last_cqm_event_signal; 3611 int thold = bss_conf->cqm_rssi_thold; 3612 int hyst = bss_conf->cqm_rssi_hyst; 3613 3614 if (sig < thold && 3615 (last_event == 0 || sig < last_event - hyst)) { 3616 ifmgd->last_cqm_event_signal = sig; 3617 ieee80211_cqm_rssi_notify( 3618 &sdata->vif, 3619 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3620 sig, GFP_KERNEL); 3621 } else if (sig > thold && 3622 (last_event == 0 || sig > last_event + hyst)) { 3623 ifmgd->last_cqm_event_signal = sig; 3624 ieee80211_cqm_rssi_notify( 3625 &sdata->vif, 3626 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3627 sig, GFP_KERNEL); 3628 } 3629 } 3630 3631 if (bss_conf->cqm_rssi_low && 3632 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3633 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3634 int last_event = ifmgd->last_cqm_event_signal; 3635 int low = bss_conf->cqm_rssi_low; 3636 int high = bss_conf->cqm_rssi_high; 3637 3638 if (sig < low && 3639 (last_event == 0 || last_event >= low)) { 3640 ifmgd->last_cqm_event_signal = sig; 3641 ieee80211_cqm_rssi_notify( 3642 &sdata->vif, 3643 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3644 sig, GFP_KERNEL); 3645 } else if (sig > high && 3646 (last_event == 0 || last_event <= high)) { 3647 ifmgd->last_cqm_event_signal = sig; 3648 ieee80211_cqm_rssi_notify( 3649 &sdata->vif, 3650 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3651 sig, GFP_KERNEL); 3652 } 3653 } 3654 } 3655 3656 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3657 struct ieee80211_mgmt *mgmt, size_t len, 3658 struct ieee80211_rx_status *rx_status) 3659 { 3660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3661 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3662 size_t baselen; 3663 struct ieee802_11_elems elems; 3664 struct ieee80211_local *local = sdata->local; 3665 struct ieee80211_chanctx_conf *chanctx_conf; 3666 struct ieee80211_channel *chan; 3667 struct sta_info *sta; 3668 u32 changed = 0; 3669 bool erp_valid; 3670 u8 erp_value = 0; 3671 u32 ncrc; 3672 u8 *bssid; 3673 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3674 3675 sdata_assert_lock(sdata); 3676 3677 /* Process beacon from the current BSS */ 3678 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3679 if (baselen > len) 3680 return; 3681 3682 rcu_read_lock(); 3683 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3684 if (!chanctx_conf) { 3685 rcu_read_unlock(); 3686 return; 3687 } 3688 3689 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3690 rcu_read_unlock(); 3691 return; 3692 } 3693 chan = chanctx_conf->def.chan; 3694 rcu_read_unlock(); 3695 3696 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3697 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3698 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3699 len - baselen, false, &elems); 3700 3701 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3702 if (elems.tim && !elems.parse_error) { 3703 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3704 ifmgd->dtim_period = tim_ie->dtim_period; 3705 } 3706 ifmgd->have_beacon = true; 3707 ifmgd->assoc_data->need_beacon = false; 3708 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3709 sdata->vif.bss_conf.sync_tsf = 3710 le64_to_cpu(mgmt->u.beacon.timestamp); 3711 sdata->vif.bss_conf.sync_device_ts = 3712 rx_status->device_timestamp; 3713 if (elems.tim) 3714 sdata->vif.bss_conf.sync_dtim_count = 3715 elems.tim->dtim_count; 3716 else 3717 sdata->vif.bss_conf.sync_dtim_count = 0; 3718 } 3719 /* continue assoc process */ 3720 ifmgd->assoc_data->timeout = jiffies; 3721 ifmgd->assoc_data->timeout_started = true; 3722 run_again(sdata, ifmgd->assoc_data->timeout); 3723 return; 3724 } 3725 3726 if (!ifmgd->associated || 3727 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3728 return; 3729 bssid = ifmgd->associated->bssid; 3730 3731 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3732 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3733 local, rx_status); 3734 3735 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3736 mlme_dbg_ratelimited(sdata, 3737 "cancelling AP probe due to a received beacon\n"); 3738 ieee80211_reset_ap_probe(sdata); 3739 } 3740 3741 /* 3742 * Push the beacon loss detection into the future since 3743 * we are processing a beacon from the AP just now. 3744 */ 3745 ieee80211_sta_reset_beacon_monitor(sdata); 3746 3747 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3748 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3749 len - baselen, false, &elems, 3750 care_about_ies, ncrc); 3751 3752 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3753 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3754 if (local->hw.conf.dynamic_ps_timeout > 0) { 3755 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3756 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3757 ieee80211_hw_config(local, 3758 IEEE80211_CONF_CHANGE_PS); 3759 } 3760 ieee80211_send_nullfunc(local, sdata, false); 3761 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3762 local->pspolling = true; 3763 3764 /* 3765 * Here is assumed that the driver will be 3766 * able to send ps-poll frame and receive a 3767 * response even though power save mode is 3768 * enabled, but some drivers might require 3769 * to disable power save here. This needs 3770 * to be investigated. 3771 */ 3772 ieee80211_send_pspoll(local, sdata); 3773 } 3774 } 3775 3776 if (sdata->vif.p2p || 3777 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3778 struct ieee80211_p2p_noa_attr noa = {}; 3779 int ret; 3780 3781 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3782 len - baselen, 3783 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3784 (u8 *) &noa, sizeof(noa)); 3785 if (ret >= 2) { 3786 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3787 /* valid noa_attr and index changed */ 3788 sdata->u.mgd.p2p_noa_index = noa.index; 3789 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3790 changed |= BSS_CHANGED_P2P_PS; 3791 /* 3792 * make sure we update all information, the CRC 3793 * mechanism doesn't look at P2P attributes. 3794 */ 3795 ifmgd->beacon_crc_valid = false; 3796 } 3797 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3798 /* noa_attr not found and we had valid noa_attr before */ 3799 sdata->u.mgd.p2p_noa_index = -1; 3800 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3801 changed |= BSS_CHANGED_P2P_PS; 3802 ifmgd->beacon_crc_valid = false; 3803 } 3804 } 3805 3806 if (ifmgd->csa_waiting_bcn) 3807 ieee80211_chswitch_post_beacon(sdata); 3808 3809 /* 3810 * Update beacon timing and dtim count on every beacon appearance. This 3811 * will allow the driver to use the most updated values. Do it before 3812 * comparing this one with last received beacon. 3813 * IMPORTANT: These parameters would possibly be out of sync by the time 3814 * the driver will use them. The synchronized view is currently 3815 * guaranteed only in certain callbacks. 3816 */ 3817 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3818 sdata->vif.bss_conf.sync_tsf = 3819 le64_to_cpu(mgmt->u.beacon.timestamp); 3820 sdata->vif.bss_conf.sync_device_ts = 3821 rx_status->device_timestamp; 3822 if (elems.tim) 3823 sdata->vif.bss_conf.sync_dtim_count = 3824 elems.tim->dtim_count; 3825 else 3826 sdata->vif.bss_conf.sync_dtim_count = 0; 3827 } 3828 3829 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3830 return; 3831 ifmgd->beacon_crc = ncrc; 3832 ifmgd->beacon_crc_valid = true; 3833 3834 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3835 3836 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3837 rx_status->device_timestamp, 3838 &elems, true); 3839 3840 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3841 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3842 elems.wmm_param_len, 3843 elems.mu_edca_param_set)) 3844 changed |= BSS_CHANGED_QOS; 3845 3846 /* 3847 * If we haven't had a beacon before, tell the driver about the 3848 * DTIM period (and beacon timing if desired) now. 3849 */ 3850 if (!ifmgd->have_beacon) { 3851 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3852 if (elems.tim) 3853 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3854 else 3855 bss_conf->dtim_period = 1; 3856 3857 changed |= BSS_CHANGED_BEACON_INFO; 3858 ifmgd->have_beacon = true; 3859 3860 mutex_lock(&local->iflist_mtx); 3861 ieee80211_recalc_ps(local); 3862 mutex_unlock(&local->iflist_mtx); 3863 3864 ieee80211_recalc_ps_vif(sdata); 3865 } 3866 3867 if (elems.erp_info) { 3868 erp_valid = true; 3869 erp_value = elems.erp_info[0]; 3870 } else { 3871 erp_valid = false; 3872 } 3873 changed |= ieee80211_handle_bss_capability(sdata, 3874 le16_to_cpu(mgmt->u.beacon.capab_info), 3875 erp_valid, erp_value); 3876 3877 mutex_lock(&local->sta_mtx); 3878 sta = sta_info_get(sdata, bssid); 3879 3880 if (ieee80211_config_bw(sdata, sta, 3881 elems.ht_cap_elem, elems.ht_operation, 3882 elems.vht_operation, elems.he_operation, 3883 bssid, &changed)) { 3884 mutex_unlock(&local->sta_mtx); 3885 sdata_info(sdata, 3886 "failed to follow AP %pM bandwidth change, disconnect\n", 3887 bssid); 3888 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3889 WLAN_REASON_DEAUTH_LEAVING, 3890 true, deauth_buf); 3891 ieee80211_report_disconnect(sdata, deauth_buf, 3892 sizeof(deauth_buf), true, 3893 WLAN_REASON_DEAUTH_LEAVING); 3894 return; 3895 } 3896 3897 if (sta && elems.opmode_notif) 3898 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3899 rx_status->band); 3900 mutex_unlock(&local->sta_mtx); 3901 3902 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3903 elems.country_elem, 3904 elems.country_elem_len, 3905 elems.pwr_constr_elem, 3906 elems.cisco_dtpc_elem); 3907 3908 ieee80211_bss_info_change_notify(sdata, changed); 3909 } 3910 3911 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3912 struct sk_buff *skb) 3913 { 3914 struct ieee80211_rx_status *rx_status; 3915 struct ieee80211_mgmt *mgmt; 3916 u16 fc; 3917 struct ieee802_11_elems elems; 3918 int ies_len; 3919 3920 rx_status = (struct ieee80211_rx_status *) skb->cb; 3921 mgmt = (struct ieee80211_mgmt *) skb->data; 3922 fc = le16_to_cpu(mgmt->frame_control); 3923 3924 sdata_lock(sdata); 3925 3926 switch (fc & IEEE80211_FCTL_STYPE) { 3927 case IEEE80211_STYPE_BEACON: 3928 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3929 break; 3930 case IEEE80211_STYPE_PROBE_RESP: 3931 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3932 break; 3933 case IEEE80211_STYPE_AUTH: 3934 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3935 break; 3936 case IEEE80211_STYPE_DEAUTH: 3937 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3938 break; 3939 case IEEE80211_STYPE_DISASSOC: 3940 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3941 break; 3942 case IEEE80211_STYPE_ASSOC_RESP: 3943 case IEEE80211_STYPE_REASSOC_RESP: 3944 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3945 break; 3946 case IEEE80211_STYPE_ACTION: 3947 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3948 ies_len = skb->len - 3949 offsetof(struct ieee80211_mgmt, 3950 u.action.u.chan_switch.variable); 3951 3952 if (ies_len < 0) 3953 break; 3954 3955 ieee802_11_parse_elems( 3956 mgmt->u.action.u.chan_switch.variable, 3957 ies_len, true, &elems); 3958 3959 if (elems.parse_error) 3960 break; 3961 3962 ieee80211_sta_process_chanswitch(sdata, 3963 rx_status->mactime, 3964 rx_status->device_timestamp, 3965 &elems, false); 3966 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3967 ies_len = skb->len - 3968 offsetof(struct ieee80211_mgmt, 3969 u.action.u.ext_chan_switch.variable); 3970 3971 if (ies_len < 0) 3972 break; 3973 3974 ieee802_11_parse_elems( 3975 mgmt->u.action.u.ext_chan_switch.variable, 3976 ies_len, true, &elems); 3977 3978 if (elems.parse_error) 3979 break; 3980 3981 /* for the handling code pretend this was also an IE */ 3982 elems.ext_chansw_ie = 3983 &mgmt->u.action.u.ext_chan_switch.data; 3984 3985 ieee80211_sta_process_chanswitch(sdata, 3986 rx_status->mactime, 3987 rx_status->device_timestamp, 3988 &elems, false); 3989 } 3990 break; 3991 } 3992 sdata_unlock(sdata); 3993 } 3994 3995 static void ieee80211_sta_timer(struct timer_list *t) 3996 { 3997 struct ieee80211_sub_if_data *sdata = 3998 from_timer(sdata, t, u.mgd.timer); 3999 4000 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4001 } 4002 4003 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4004 u8 *bssid, u8 reason, bool tx) 4005 { 4006 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4007 4008 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4009 tx, frame_buf); 4010 4011 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4012 reason); 4013 } 4014 4015 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4016 { 4017 struct ieee80211_local *local = sdata->local; 4018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4019 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4020 u32 tx_flags = 0; 4021 u16 trans = 1; 4022 u16 status = 0; 4023 u16 prepare_tx_duration = 0; 4024 4025 sdata_assert_lock(sdata); 4026 4027 if (WARN_ON_ONCE(!auth_data)) 4028 return -EINVAL; 4029 4030 auth_data->tries++; 4031 4032 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4033 sdata_info(sdata, "authentication with %pM timed out\n", 4034 auth_data->bss->bssid); 4035 4036 /* 4037 * Most likely AP is not in the range so remove the 4038 * bss struct for that AP. 4039 */ 4040 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4041 4042 return -ETIMEDOUT; 4043 } 4044 4045 if (auth_data->algorithm == WLAN_AUTH_SAE) 4046 prepare_tx_duration = 4047 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4048 4049 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4050 4051 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4052 auth_data->bss->bssid, auth_data->tries, 4053 IEEE80211_AUTH_MAX_TRIES); 4054 4055 auth_data->expected_transaction = 2; 4056 4057 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4058 trans = auth_data->sae_trans; 4059 status = auth_data->sae_status; 4060 auth_data->expected_transaction = trans; 4061 } 4062 4063 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4064 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4065 IEEE80211_TX_INTFL_MLME_CONN_TX; 4066 4067 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4068 auth_data->data, auth_data->data_len, 4069 auth_data->bss->bssid, 4070 auth_data->bss->bssid, NULL, 0, 0, 4071 tx_flags); 4072 4073 if (tx_flags == 0) { 4074 if (auth_data->algorithm == WLAN_AUTH_SAE) 4075 auth_data->timeout = jiffies + 4076 IEEE80211_AUTH_TIMEOUT_SAE; 4077 else 4078 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4079 } else { 4080 auth_data->timeout = 4081 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4082 } 4083 4084 auth_data->timeout_started = true; 4085 run_again(sdata, auth_data->timeout); 4086 4087 return 0; 4088 } 4089 4090 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4091 { 4092 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4093 struct ieee80211_local *local = sdata->local; 4094 4095 sdata_assert_lock(sdata); 4096 4097 assoc_data->tries++; 4098 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4099 sdata_info(sdata, "association with %pM timed out\n", 4100 assoc_data->bss->bssid); 4101 4102 /* 4103 * Most likely AP is not in the range so remove the 4104 * bss struct for that AP. 4105 */ 4106 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4107 4108 return -ETIMEDOUT; 4109 } 4110 4111 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4112 assoc_data->bss->bssid, assoc_data->tries, 4113 IEEE80211_ASSOC_MAX_TRIES); 4114 ieee80211_send_assoc(sdata); 4115 4116 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4117 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4118 assoc_data->timeout_started = true; 4119 run_again(sdata, assoc_data->timeout); 4120 } else { 4121 assoc_data->timeout = 4122 round_jiffies_up(jiffies + 4123 IEEE80211_ASSOC_TIMEOUT_LONG); 4124 assoc_data->timeout_started = true; 4125 run_again(sdata, assoc_data->timeout); 4126 } 4127 4128 return 0; 4129 } 4130 4131 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4132 __le16 fc, bool acked) 4133 { 4134 struct ieee80211_local *local = sdata->local; 4135 4136 sdata->u.mgd.status_fc = fc; 4137 sdata->u.mgd.status_acked = acked; 4138 sdata->u.mgd.status_received = true; 4139 4140 ieee80211_queue_work(&local->hw, &sdata->work); 4141 } 4142 4143 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4144 { 4145 struct ieee80211_local *local = sdata->local; 4146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4147 4148 sdata_lock(sdata); 4149 4150 if (ifmgd->status_received) { 4151 __le16 fc = ifmgd->status_fc; 4152 bool status_acked = ifmgd->status_acked; 4153 4154 ifmgd->status_received = false; 4155 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4156 if (status_acked) { 4157 if (ifmgd->auth_data->algorithm == 4158 WLAN_AUTH_SAE) 4159 ifmgd->auth_data->timeout = 4160 jiffies + 4161 IEEE80211_AUTH_TIMEOUT_SAE; 4162 else 4163 ifmgd->auth_data->timeout = 4164 jiffies + 4165 IEEE80211_AUTH_TIMEOUT_SHORT; 4166 run_again(sdata, ifmgd->auth_data->timeout); 4167 } else { 4168 ifmgd->auth_data->timeout = jiffies - 1; 4169 } 4170 ifmgd->auth_data->timeout_started = true; 4171 } else if (ifmgd->assoc_data && 4172 (ieee80211_is_assoc_req(fc) || 4173 ieee80211_is_reassoc_req(fc))) { 4174 if (status_acked) { 4175 ifmgd->assoc_data->timeout = 4176 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4177 run_again(sdata, ifmgd->assoc_data->timeout); 4178 } else { 4179 ifmgd->assoc_data->timeout = jiffies - 1; 4180 } 4181 ifmgd->assoc_data->timeout_started = true; 4182 } 4183 } 4184 4185 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4186 time_after(jiffies, ifmgd->auth_data->timeout)) { 4187 if (ifmgd->auth_data->done) { 4188 /* 4189 * ok ... we waited for assoc but userspace didn't, 4190 * so let's just kill the auth data 4191 */ 4192 ieee80211_destroy_auth_data(sdata, false); 4193 } else if (ieee80211_auth(sdata)) { 4194 u8 bssid[ETH_ALEN]; 4195 struct ieee80211_event event = { 4196 .type = MLME_EVENT, 4197 .u.mlme.data = AUTH_EVENT, 4198 .u.mlme.status = MLME_TIMEOUT, 4199 }; 4200 4201 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4202 4203 ieee80211_destroy_auth_data(sdata, false); 4204 4205 cfg80211_auth_timeout(sdata->dev, bssid); 4206 drv_event_callback(sdata->local, sdata, &event); 4207 } 4208 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4209 run_again(sdata, ifmgd->auth_data->timeout); 4210 4211 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4212 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4213 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4214 ieee80211_do_assoc(sdata)) { 4215 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4216 struct ieee80211_event event = { 4217 .type = MLME_EVENT, 4218 .u.mlme.data = ASSOC_EVENT, 4219 .u.mlme.status = MLME_TIMEOUT, 4220 }; 4221 4222 ieee80211_destroy_assoc_data(sdata, false, false); 4223 cfg80211_assoc_timeout(sdata->dev, bss); 4224 drv_event_callback(sdata->local, sdata, &event); 4225 } 4226 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4227 run_again(sdata, ifmgd->assoc_data->timeout); 4228 4229 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4230 ifmgd->associated) { 4231 u8 bssid[ETH_ALEN]; 4232 int max_tries; 4233 4234 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4235 4236 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4237 max_tries = max_nullfunc_tries; 4238 else 4239 max_tries = max_probe_tries; 4240 4241 /* ACK received for nullfunc probing frame */ 4242 if (!ifmgd->probe_send_count) 4243 ieee80211_reset_ap_probe(sdata); 4244 else if (ifmgd->nullfunc_failed) { 4245 if (ifmgd->probe_send_count < max_tries) { 4246 mlme_dbg(sdata, 4247 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4248 bssid, ifmgd->probe_send_count, 4249 max_tries); 4250 ieee80211_mgd_probe_ap_send(sdata); 4251 } else { 4252 mlme_dbg(sdata, 4253 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4254 bssid); 4255 ieee80211_sta_connection_lost(sdata, bssid, 4256 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4257 false); 4258 } 4259 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4260 run_again(sdata, ifmgd->probe_timeout); 4261 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4262 mlme_dbg(sdata, 4263 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4264 bssid, probe_wait_ms); 4265 ieee80211_sta_connection_lost(sdata, bssid, 4266 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4267 } else if (ifmgd->probe_send_count < max_tries) { 4268 mlme_dbg(sdata, 4269 "No probe response from AP %pM after %dms, try %d/%i\n", 4270 bssid, probe_wait_ms, 4271 ifmgd->probe_send_count, max_tries); 4272 ieee80211_mgd_probe_ap_send(sdata); 4273 } else { 4274 /* 4275 * We actually lost the connection ... or did we? 4276 * Let's make sure! 4277 */ 4278 mlme_dbg(sdata, 4279 "No probe response from AP %pM after %dms, disconnecting.\n", 4280 bssid, probe_wait_ms); 4281 4282 ieee80211_sta_connection_lost(sdata, bssid, 4283 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4284 } 4285 } 4286 4287 sdata_unlock(sdata); 4288 } 4289 4290 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4291 { 4292 struct ieee80211_sub_if_data *sdata = 4293 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4295 4296 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4297 return; 4298 4299 sdata->u.mgd.connection_loss = false; 4300 ieee80211_queue_work(&sdata->local->hw, 4301 &sdata->u.mgd.beacon_connection_loss_work); 4302 } 4303 4304 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4305 { 4306 struct ieee80211_sub_if_data *sdata = 4307 from_timer(sdata, t, u.mgd.conn_mon_timer); 4308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4309 struct ieee80211_local *local = sdata->local; 4310 4311 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4312 return; 4313 4314 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4315 } 4316 4317 static void ieee80211_sta_monitor_work(struct work_struct *work) 4318 { 4319 struct ieee80211_sub_if_data *sdata = 4320 container_of(work, struct ieee80211_sub_if_data, 4321 u.mgd.monitor_work); 4322 4323 ieee80211_mgd_probe_ap(sdata, false); 4324 } 4325 4326 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4327 { 4328 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4329 __ieee80211_stop_poll(sdata); 4330 4331 /* let's probe the connection once */ 4332 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4333 ieee80211_queue_work(&sdata->local->hw, 4334 &sdata->u.mgd.monitor_work); 4335 } 4336 } 4337 4338 #ifdef CONFIG_PM 4339 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4340 { 4341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4342 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4343 4344 sdata_lock(sdata); 4345 4346 if (ifmgd->auth_data || ifmgd->assoc_data) { 4347 const u8 *bssid = ifmgd->auth_data ? 4348 ifmgd->auth_data->bss->bssid : 4349 ifmgd->assoc_data->bss->bssid; 4350 4351 /* 4352 * If we are trying to authenticate / associate while suspending, 4353 * cfg80211 won't know and won't actually abort those attempts, 4354 * thus we need to do that ourselves. 4355 */ 4356 ieee80211_send_deauth_disassoc(sdata, bssid, 4357 IEEE80211_STYPE_DEAUTH, 4358 WLAN_REASON_DEAUTH_LEAVING, 4359 false, frame_buf); 4360 if (ifmgd->assoc_data) 4361 ieee80211_destroy_assoc_data(sdata, false, true); 4362 if (ifmgd->auth_data) 4363 ieee80211_destroy_auth_data(sdata, false); 4364 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4365 IEEE80211_DEAUTH_FRAME_LEN); 4366 } 4367 4368 /* This is a bit of a hack - we should find a better and more generic 4369 * solution to this. Normally when suspending, cfg80211 will in fact 4370 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4371 * auth (not so important) or assoc (this is the problem) process. 4372 * 4373 * As a consequence, it can happen that we are in the process of both 4374 * associating and suspending, and receive an association response 4375 * after cfg80211 has checked if it needs to disconnect, but before 4376 * we actually set the flag to drop incoming frames. This will then 4377 * cause the workqueue flush to process the association response in 4378 * the suspend, resulting in a successful association just before it 4379 * tries to remove the interface from the driver, which now though 4380 * has a channel context assigned ... this results in issues. 4381 * 4382 * To work around this (for now) simply deauth here again if we're 4383 * now connected. 4384 */ 4385 if (ifmgd->associated && !sdata->local->wowlan) { 4386 u8 bssid[ETH_ALEN]; 4387 struct cfg80211_deauth_request req = { 4388 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4389 .bssid = bssid, 4390 }; 4391 4392 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4393 ieee80211_mgd_deauth(sdata, &req); 4394 } 4395 4396 sdata_unlock(sdata); 4397 } 4398 4399 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4400 { 4401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4402 4403 sdata_lock(sdata); 4404 if (!ifmgd->associated) { 4405 sdata_unlock(sdata); 4406 return; 4407 } 4408 4409 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4410 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4411 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4412 ieee80211_sta_connection_lost(sdata, 4413 ifmgd->associated->bssid, 4414 WLAN_REASON_UNSPECIFIED, 4415 true); 4416 sdata_unlock(sdata); 4417 return; 4418 } 4419 sdata_unlock(sdata); 4420 } 4421 #endif 4422 4423 /* interface setup */ 4424 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4425 { 4426 struct ieee80211_if_managed *ifmgd; 4427 4428 ifmgd = &sdata->u.mgd; 4429 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4430 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4431 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4432 ieee80211_beacon_connection_loss_work); 4433 INIT_WORK(&ifmgd->csa_connection_drop_work, 4434 ieee80211_csa_connection_drop_work); 4435 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4436 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4437 ieee80211_tdls_peer_del_work); 4438 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4439 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4440 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4441 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4442 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4443 ieee80211_sta_handle_tspec_ac_params_wk); 4444 4445 ifmgd->flags = 0; 4446 ifmgd->powersave = sdata->wdev.ps; 4447 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4448 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4449 ifmgd->p2p_noa_index = -1; 4450 4451 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4452 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4453 else 4454 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4455 4456 /* Setup TDLS data */ 4457 spin_lock_init(&ifmgd->teardown_lock); 4458 ifmgd->teardown_skb = NULL; 4459 ifmgd->orig_teardown_skb = NULL; 4460 } 4461 4462 /* scan finished notification */ 4463 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4464 { 4465 struct ieee80211_sub_if_data *sdata; 4466 4467 /* Restart STA timers */ 4468 rcu_read_lock(); 4469 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4470 if (ieee80211_sdata_running(sdata)) 4471 ieee80211_restart_sta_timer(sdata); 4472 } 4473 rcu_read_unlock(); 4474 } 4475 4476 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4477 struct cfg80211_bss *cbss) 4478 { 4479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4480 const u8 *ht_cap_ie, *vht_cap_ie; 4481 const struct ieee80211_ht_cap *ht_cap; 4482 const struct ieee80211_vht_cap *vht_cap; 4483 u8 chains = 1; 4484 4485 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4486 return chains; 4487 4488 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4489 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4490 ht_cap = (void *)(ht_cap_ie + 2); 4491 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4492 /* 4493 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4494 * "Tx Unequal Modulation Supported" fields. 4495 */ 4496 } 4497 4498 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4499 return chains; 4500 4501 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4502 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4503 u8 nss; 4504 u16 tx_mcs_map; 4505 4506 vht_cap = (void *)(vht_cap_ie + 2); 4507 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4508 for (nss = 8; nss > 0; nss--) { 4509 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4510 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4511 break; 4512 } 4513 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4514 chains = max(chains, nss); 4515 } 4516 4517 return chains; 4518 } 4519 4520 static bool 4521 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4522 const struct ieee80211_he_operation *he_op) 4523 { 4524 const struct ieee80211_sta_he_cap *sta_he_cap = 4525 ieee80211_get_he_sta_cap(sband); 4526 u16 ap_min_req_set; 4527 int i; 4528 4529 if (!sta_he_cap || !he_op) 4530 return false; 4531 4532 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4533 4534 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4535 for (i = 0; i < 3; i++) { 4536 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4537 &sta_he_cap->he_mcs_nss_supp; 4538 u16 sta_mcs_map_rx = 4539 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4540 u16 sta_mcs_map_tx = 4541 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4542 u8 nss; 4543 bool verified = true; 4544 4545 /* 4546 * For each band there is a maximum of 8 spatial streams 4547 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4548 * of 2 bits per NSS (1-8), with the values defined in enum 4549 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4550 * capabilities aren't less than the AP's minimum requirements 4551 * for this HE BSS per SS. 4552 * It is enough to find one such band that meets the reqs. 4553 */ 4554 for (nss = 8; nss > 0; nss--) { 4555 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4556 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4557 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4558 4559 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4560 continue; 4561 4562 /* 4563 * Make sure the HE AP doesn't require MCSs that aren't 4564 * supported by the client 4565 */ 4566 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4567 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4568 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4569 verified = false; 4570 break; 4571 } 4572 } 4573 4574 if (verified) 4575 return true; 4576 } 4577 4578 /* If here, STA doesn't meet AP's HE min requirements */ 4579 return false; 4580 } 4581 4582 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4583 struct cfg80211_bss *cbss) 4584 { 4585 struct ieee80211_local *local = sdata->local; 4586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4587 const struct ieee80211_ht_cap *ht_cap = NULL; 4588 const struct ieee80211_ht_operation *ht_oper = NULL; 4589 const struct ieee80211_vht_operation *vht_oper = NULL; 4590 const struct ieee80211_he_operation *he_oper = NULL; 4591 struct ieee80211_supported_band *sband; 4592 struct cfg80211_chan_def chandef; 4593 int ret; 4594 u32 i; 4595 bool have_80mhz; 4596 4597 sband = local->hw.wiphy->bands[cbss->channel->band]; 4598 4599 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4600 IEEE80211_STA_DISABLE_80P80MHZ | 4601 IEEE80211_STA_DISABLE_160MHZ); 4602 4603 rcu_read_lock(); 4604 4605 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4606 sband->ht_cap.ht_supported) { 4607 const u8 *ht_oper_ie, *ht_cap_ie; 4608 4609 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4610 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4611 ht_oper = (void *)(ht_oper_ie + 2); 4612 4613 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4614 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4615 ht_cap = (void *)(ht_cap_ie + 2); 4616 4617 if (!ht_cap) { 4618 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4619 ht_oper = NULL; 4620 } 4621 } 4622 4623 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4624 sband->vht_cap.vht_supported) { 4625 const u8 *vht_oper_ie, *vht_cap; 4626 4627 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4628 WLAN_EID_VHT_OPERATION); 4629 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4630 vht_oper = (void *)(vht_oper_ie + 2); 4631 if (vht_oper && !ht_oper) { 4632 vht_oper = NULL; 4633 sdata_info(sdata, 4634 "AP advertised VHT without HT, disabling both\n"); 4635 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4636 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4637 } 4638 4639 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4640 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4641 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4642 vht_oper = NULL; 4643 } 4644 } 4645 4646 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 4647 ieee80211_get_he_sta_cap(sband)) { 4648 const struct cfg80211_bss_ies *ies; 4649 const u8 *he_oper_ie; 4650 4651 ies = rcu_dereference(cbss->ies); 4652 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4653 ies->data, ies->len); 4654 if (he_oper_ie && 4655 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4656 he_oper = (void *)(he_oper_ie + 3); 4657 else 4658 he_oper = NULL; 4659 4660 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4661 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4662 } 4663 4664 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4665 have_80mhz = false; 4666 for (i = 0; i < sband->n_channels; i++) { 4667 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4668 IEEE80211_CHAN_NO_80MHZ)) 4669 continue; 4670 4671 have_80mhz = true; 4672 break; 4673 } 4674 4675 if (!have_80mhz) 4676 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4677 4678 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4679 cbss->channel, 4680 ht_oper, vht_oper, he_oper, 4681 &chandef, false); 4682 4683 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4684 local->rx_chains); 4685 4686 rcu_read_unlock(); 4687 4688 /* will change later if needed */ 4689 sdata->smps_mode = IEEE80211_SMPS_OFF; 4690 4691 mutex_lock(&local->mtx); 4692 /* 4693 * If this fails (possibly due to channel context sharing 4694 * on incompatible channels, e.g. 80+80 and 160 sharing the 4695 * same control channel) try to use a smaller bandwidth. 4696 */ 4697 ret = ieee80211_vif_use_channel(sdata, &chandef, 4698 IEEE80211_CHANCTX_SHARED); 4699 4700 /* don't downgrade for 5 and 10 MHz channels, though. */ 4701 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4702 chandef.width == NL80211_CHAN_WIDTH_10) 4703 goto out; 4704 4705 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4706 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4707 ret = ieee80211_vif_use_channel(sdata, &chandef, 4708 IEEE80211_CHANCTX_SHARED); 4709 } 4710 out: 4711 mutex_unlock(&local->mtx); 4712 return ret; 4713 } 4714 4715 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4716 struct cfg80211_bss *cbss, bool assoc, 4717 bool override) 4718 { 4719 struct ieee80211_local *local = sdata->local; 4720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4721 struct ieee80211_bss *bss = (void *)cbss->priv; 4722 struct sta_info *new_sta = NULL; 4723 struct ieee80211_supported_band *sband; 4724 bool have_sta = false; 4725 int err; 4726 4727 sband = local->hw.wiphy->bands[cbss->channel->band]; 4728 4729 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4730 return -EINVAL; 4731 4732 /* If a reconfig is happening, bail out */ 4733 if (local->in_reconfig) 4734 return -EBUSY; 4735 4736 if (assoc) { 4737 rcu_read_lock(); 4738 have_sta = sta_info_get(sdata, cbss->bssid); 4739 rcu_read_unlock(); 4740 } 4741 4742 if (!have_sta) { 4743 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4744 if (!new_sta) 4745 return -ENOMEM; 4746 } 4747 4748 /* 4749 * Set up the information for the new channel before setting the 4750 * new channel. We can't - completely race-free - change the basic 4751 * rates bitmap and the channel (sband) that it refers to, but if 4752 * we set it up before we at least avoid calling into the driver's 4753 * bss_info_changed() method with invalid information (since we do 4754 * call that from changing the channel - only for IDLE and perhaps 4755 * some others, but ...). 4756 * 4757 * So to avoid that, just set up all the new information before the 4758 * channel, but tell the driver to apply it only afterwards, since 4759 * it might need the new channel for that. 4760 */ 4761 if (new_sta) { 4762 u32 rates = 0, basic_rates = 0; 4763 bool have_higher_than_11mbit; 4764 int min_rate = INT_MAX, min_rate_index = -1; 4765 const struct cfg80211_bss_ies *ies; 4766 int shift = ieee80211_vif_get_shift(&sdata->vif); 4767 4768 ieee80211_get_rates(sband, bss->supp_rates, 4769 bss->supp_rates_len, 4770 &rates, &basic_rates, 4771 &have_higher_than_11mbit, 4772 &min_rate, &min_rate_index, 4773 shift); 4774 4775 /* 4776 * This used to be a workaround for basic rates missing 4777 * in the association response frame. Now that we no 4778 * longer use the basic rates from there, it probably 4779 * doesn't happen any more, but keep the workaround so 4780 * in case some *other* APs are buggy in different ways 4781 * we can connect -- with a warning. 4782 */ 4783 if (!basic_rates && min_rate_index >= 0) { 4784 sdata_info(sdata, 4785 "No basic rates, using min rate instead\n"); 4786 basic_rates = BIT(min_rate_index); 4787 } 4788 4789 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4790 sdata->vif.bss_conf.basic_rates = basic_rates; 4791 4792 /* cf. IEEE 802.11 9.2.12 */ 4793 if (cbss->channel->band == NL80211_BAND_2GHZ && 4794 have_higher_than_11mbit) 4795 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4796 else 4797 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4798 4799 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4800 4801 /* set timing information */ 4802 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4803 rcu_read_lock(); 4804 ies = rcu_dereference(cbss->beacon_ies); 4805 if (ies) { 4806 const u8 *tim_ie; 4807 4808 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4809 sdata->vif.bss_conf.sync_device_ts = 4810 bss->device_ts_beacon; 4811 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4812 ies->data, ies->len); 4813 if (tim_ie && tim_ie[1] >= 2) 4814 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4815 else 4816 sdata->vif.bss_conf.sync_dtim_count = 0; 4817 } else if (!ieee80211_hw_check(&sdata->local->hw, 4818 TIMING_BEACON_ONLY)) { 4819 ies = rcu_dereference(cbss->proberesp_ies); 4820 /* must be non-NULL since beacon IEs were NULL */ 4821 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4822 sdata->vif.bss_conf.sync_device_ts = 4823 bss->device_ts_presp; 4824 sdata->vif.bss_conf.sync_dtim_count = 0; 4825 } else { 4826 sdata->vif.bss_conf.sync_tsf = 0; 4827 sdata->vif.bss_conf.sync_device_ts = 0; 4828 sdata->vif.bss_conf.sync_dtim_count = 0; 4829 } 4830 rcu_read_unlock(); 4831 } 4832 4833 if (new_sta || override) { 4834 err = ieee80211_prep_channel(sdata, cbss); 4835 if (err) { 4836 if (new_sta) 4837 sta_info_free(local, new_sta); 4838 return -EINVAL; 4839 } 4840 } 4841 4842 if (new_sta) { 4843 /* 4844 * tell driver about BSSID, basic rates and timing 4845 * this was set up above, before setting the channel 4846 */ 4847 ieee80211_bss_info_change_notify(sdata, 4848 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4849 BSS_CHANGED_BEACON_INT); 4850 4851 if (assoc) 4852 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4853 4854 err = sta_info_insert(new_sta); 4855 new_sta = NULL; 4856 if (err) { 4857 sdata_info(sdata, 4858 "failed to insert STA entry for the AP (error %d)\n", 4859 err); 4860 return err; 4861 } 4862 } else 4863 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4864 4865 /* Cancel scan to ensure that nothing interferes with connection */ 4866 if (local->scanning) 4867 ieee80211_scan_cancel(local); 4868 4869 return 0; 4870 } 4871 4872 /* config hooks */ 4873 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4874 struct cfg80211_auth_request *req) 4875 { 4876 struct ieee80211_local *local = sdata->local; 4877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4878 struct ieee80211_mgd_auth_data *auth_data; 4879 u16 auth_alg; 4880 int err; 4881 4882 /* prepare auth data structure */ 4883 4884 switch (req->auth_type) { 4885 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4886 auth_alg = WLAN_AUTH_OPEN; 4887 break; 4888 case NL80211_AUTHTYPE_SHARED_KEY: 4889 if (IS_ERR(local->wep_tx_tfm)) 4890 return -EOPNOTSUPP; 4891 auth_alg = WLAN_AUTH_SHARED_KEY; 4892 break; 4893 case NL80211_AUTHTYPE_FT: 4894 auth_alg = WLAN_AUTH_FT; 4895 break; 4896 case NL80211_AUTHTYPE_NETWORK_EAP: 4897 auth_alg = WLAN_AUTH_LEAP; 4898 break; 4899 case NL80211_AUTHTYPE_SAE: 4900 auth_alg = WLAN_AUTH_SAE; 4901 break; 4902 case NL80211_AUTHTYPE_FILS_SK: 4903 auth_alg = WLAN_AUTH_FILS_SK; 4904 break; 4905 case NL80211_AUTHTYPE_FILS_SK_PFS: 4906 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4907 break; 4908 case NL80211_AUTHTYPE_FILS_PK: 4909 auth_alg = WLAN_AUTH_FILS_PK; 4910 break; 4911 default: 4912 return -EOPNOTSUPP; 4913 } 4914 4915 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4916 req->ie_len, GFP_KERNEL); 4917 if (!auth_data) 4918 return -ENOMEM; 4919 4920 auth_data->bss = req->bss; 4921 4922 if (req->auth_data_len >= 4) { 4923 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4924 __le16 *pos = (__le16 *) req->auth_data; 4925 4926 auth_data->sae_trans = le16_to_cpu(pos[0]); 4927 auth_data->sae_status = le16_to_cpu(pos[1]); 4928 } 4929 memcpy(auth_data->data, req->auth_data + 4, 4930 req->auth_data_len - 4); 4931 auth_data->data_len += req->auth_data_len - 4; 4932 } 4933 4934 if (req->ie && req->ie_len) { 4935 memcpy(&auth_data->data[auth_data->data_len], 4936 req->ie, req->ie_len); 4937 auth_data->data_len += req->ie_len; 4938 } 4939 4940 if (req->key && req->key_len) { 4941 auth_data->key_len = req->key_len; 4942 auth_data->key_idx = req->key_idx; 4943 memcpy(auth_data->key, req->key, req->key_len); 4944 } 4945 4946 auth_data->algorithm = auth_alg; 4947 4948 /* try to authenticate/probe */ 4949 4950 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4951 ifmgd->assoc_data) { 4952 err = -EBUSY; 4953 goto err_free; 4954 } 4955 4956 if (ifmgd->auth_data) 4957 ieee80211_destroy_auth_data(sdata, false); 4958 4959 /* prep auth_data so we don't go into idle on disassoc */ 4960 ifmgd->auth_data = auth_data; 4961 4962 if (ifmgd->associated) { 4963 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4964 4965 sdata_info(sdata, 4966 "disconnect from AP %pM for new auth to %pM\n", 4967 ifmgd->associated->bssid, req->bss->bssid); 4968 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4969 WLAN_REASON_UNSPECIFIED, 4970 false, frame_buf); 4971 4972 ieee80211_report_disconnect(sdata, frame_buf, 4973 sizeof(frame_buf), true, 4974 WLAN_REASON_UNSPECIFIED); 4975 } 4976 4977 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4978 4979 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4980 if (err) 4981 goto err_clear; 4982 4983 err = ieee80211_auth(sdata); 4984 if (err) { 4985 sta_info_destroy_addr(sdata, req->bss->bssid); 4986 goto err_clear; 4987 } 4988 4989 /* hold our own reference */ 4990 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4991 return 0; 4992 4993 err_clear: 4994 eth_zero_addr(ifmgd->bssid); 4995 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4996 ifmgd->auth_data = NULL; 4997 mutex_lock(&sdata->local->mtx); 4998 ieee80211_vif_release_channel(sdata); 4999 mutex_unlock(&sdata->local->mtx); 5000 err_free: 5001 kfree(auth_data); 5002 return err; 5003 } 5004 5005 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5006 struct cfg80211_assoc_request *req) 5007 { 5008 struct ieee80211_local *local = sdata->local; 5009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5010 struct ieee80211_bss *bss = (void *)req->bss->priv; 5011 struct ieee80211_mgd_assoc_data *assoc_data; 5012 const struct cfg80211_bss_ies *beacon_ies; 5013 struct ieee80211_supported_band *sband; 5014 const u8 *ssidie, *ht_ie, *vht_ie; 5015 int i, err; 5016 bool override = false; 5017 5018 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5019 if (!assoc_data) 5020 return -ENOMEM; 5021 5022 rcu_read_lock(); 5023 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5024 if (!ssidie) { 5025 rcu_read_unlock(); 5026 kfree(assoc_data); 5027 return -EINVAL; 5028 } 5029 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5030 assoc_data->ssid_len = ssidie[1]; 5031 rcu_read_unlock(); 5032 5033 if (ifmgd->associated) { 5034 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5035 5036 sdata_info(sdata, 5037 "disconnect from AP %pM for new assoc to %pM\n", 5038 ifmgd->associated->bssid, req->bss->bssid); 5039 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5040 WLAN_REASON_UNSPECIFIED, 5041 false, frame_buf); 5042 5043 ieee80211_report_disconnect(sdata, frame_buf, 5044 sizeof(frame_buf), true, 5045 WLAN_REASON_UNSPECIFIED); 5046 } 5047 5048 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5049 err = -EBUSY; 5050 goto err_free; 5051 } 5052 5053 if (ifmgd->assoc_data) { 5054 err = -EBUSY; 5055 goto err_free; 5056 } 5057 5058 if (ifmgd->auth_data) { 5059 bool match; 5060 5061 /* keep sta info, bssid if matching */ 5062 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5063 ieee80211_destroy_auth_data(sdata, match); 5064 } 5065 5066 /* prepare assoc data */ 5067 5068 ifmgd->beacon_crc_valid = false; 5069 5070 assoc_data->wmm = bss->wmm_used && 5071 (local->hw.queues >= IEEE80211_NUM_ACS); 5072 5073 /* 5074 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5075 * We still associate in non-HT mode (11a/b/g) if any one of these 5076 * ciphers is configured as pairwise. 5077 * We can set this to true for non-11n hardware, that'll be checked 5078 * separately along with the peer capabilities. 5079 */ 5080 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5081 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5082 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5083 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5084 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5085 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5086 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5087 netdev_info(sdata->dev, 5088 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5089 } 5090 } 5091 5092 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5093 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5094 if (!sband->ht_cap.ht_supported || 5095 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5096 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5097 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5098 if (!bss->wmm_used && 5099 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5100 netdev_info(sdata->dev, 5101 "disabling HT as WMM/QoS is not supported by the AP\n"); 5102 } 5103 5104 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5105 if (!sband->vht_cap.vht_supported || 5106 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5107 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5108 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5109 if (!bss->wmm_used && 5110 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5111 netdev_info(sdata->dev, 5112 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5113 } 5114 5115 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5116 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5117 sizeof(ifmgd->ht_capa_mask)); 5118 5119 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5120 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5121 sizeof(ifmgd->vht_capa_mask)); 5122 5123 if (req->ie && req->ie_len) { 5124 memcpy(assoc_data->ie, req->ie, req->ie_len); 5125 assoc_data->ie_len = req->ie_len; 5126 } 5127 5128 if (req->fils_kek) { 5129 /* should already be checked in cfg80211 - so warn */ 5130 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5131 err = -EINVAL; 5132 goto err_free; 5133 } 5134 memcpy(assoc_data->fils_kek, req->fils_kek, 5135 req->fils_kek_len); 5136 assoc_data->fils_kek_len = req->fils_kek_len; 5137 } 5138 5139 if (req->fils_nonces) 5140 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5141 2 * FILS_NONCE_LEN); 5142 5143 assoc_data->bss = req->bss; 5144 5145 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5146 if (ifmgd->powersave) 5147 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5148 else 5149 sdata->smps_mode = IEEE80211_SMPS_OFF; 5150 } else 5151 sdata->smps_mode = ifmgd->req_smps; 5152 5153 assoc_data->capability = req->bss->capability; 5154 assoc_data->supp_rates = bss->supp_rates; 5155 assoc_data->supp_rates_len = bss->supp_rates_len; 5156 5157 rcu_read_lock(); 5158 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5159 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5160 assoc_data->ap_ht_param = 5161 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5162 else 5163 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5164 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5165 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5166 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5167 sizeof(struct ieee80211_vht_cap)); 5168 else 5169 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5170 rcu_read_unlock(); 5171 5172 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5173 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5174 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5175 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5176 5177 if (bss->wmm_used && bss->uapsd_supported && 5178 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5179 assoc_data->uapsd = true; 5180 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5181 } else { 5182 assoc_data->uapsd = false; 5183 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5184 } 5185 5186 if (req->prev_bssid) 5187 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5188 5189 if (req->use_mfp) { 5190 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5191 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5192 } else { 5193 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5194 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5195 } 5196 5197 if (req->flags & ASSOC_REQ_USE_RRM) 5198 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5199 else 5200 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5201 5202 if (req->crypto.control_port) 5203 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5204 else 5205 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5206 5207 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5208 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5209 sdata->control_port_over_nl80211 = 5210 req->crypto.control_port_over_nl80211; 5211 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5212 sdata->vif.type); 5213 5214 /* kick off associate process */ 5215 5216 ifmgd->assoc_data = assoc_data; 5217 ifmgd->dtim_period = 0; 5218 ifmgd->have_beacon = false; 5219 5220 /* override HT/VHT configuration only if the AP and we support it */ 5221 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5222 struct ieee80211_sta_ht_cap sta_ht_cap; 5223 5224 if (req->flags & ASSOC_REQ_DISABLE_HT) 5225 override = true; 5226 5227 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5228 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5229 5230 /* check for 40 MHz disable override */ 5231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5232 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5233 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5234 override = true; 5235 5236 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5237 req->flags & ASSOC_REQ_DISABLE_VHT) 5238 override = true; 5239 } 5240 5241 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5242 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5243 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5244 } 5245 5246 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5247 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5248 5249 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5250 if (err) 5251 goto err_clear; 5252 5253 rcu_read_lock(); 5254 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5255 5256 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5257 !beacon_ies) { 5258 /* 5259 * Wait up to one beacon interval ... 5260 * should this be more if we miss one? 5261 */ 5262 sdata_info(sdata, "waiting for beacon from %pM\n", 5263 ifmgd->bssid); 5264 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5265 assoc_data->timeout_started = true; 5266 assoc_data->need_beacon = true; 5267 } else if (beacon_ies) { 5268 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 5269 beacon_ies->data, 5270 beacon_ies->len); 5271 u8 dtim_count = 0; 5272 5273 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 5274 const struct ieee80211_tim_ie *tim; 5275 tim = (void *)(tim_ie + 2); 5276 ifmgd->dtim_period = tim->dtim_period; 5277 dtim_count = tim->dtim_count; 5278 } 5279 ifmgd->have_beacon = true; 5280 assoc_data->timeout = jiffies; 5281 assoc_data->timeout_started = true; 5282 5283 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5284 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5285 sdata->vif.bss_conf.sync_device_ts = 5286 bss->device_ts_beacon; 5287 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5288 } 5289 } else { 5290 assoc_data->timeout = jiffies; 5291 assoc_data->timeout_started = true; 5292 } 5293 rcu_read_unlock(); 5294 5295 run_again(sdata, assoc_data->timeout); 5296 5297 if (bss->corrupt_data) { 5298 char *corrupt_type = "data"; 5299 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5300 if (bss->corrupt_data & 5301 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5302 corrupt_type = "beacon and probe response"; 5303 else 5304 corrupt_type = "beacon"; 5305 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5306 corrupt_type = "probe response"; 5307 sdata_info(sdata, "associating with AP with corrupt %s\n", 5308 corrupt_type); 5309 } 5310 5311 return 0; 5312 err_clear: 5313 eth_zero_addr(ifmgd->bssid); 5314 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5315 ifmgd->assoc_data = NULL; 5316 err_free: 5317 kfree(assoc_data); 5318 return err; 5319 } 5320 5321 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5322 struct cfg80211_deauth_request *req) 5323 { 5324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5325 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5326 bool tx = !req->local_state_change; 5327 5328 if (ifmgd->auth_data && 5329 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5330 sdata_info(sdata, 5331 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5332 req->bssid, req->reason_code, 5333 ieee80211_get_reason_code_string(req->reason_code)); 5334 5335 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5336 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5337 IEEE80211_STYPE_DEAUTH, 5338 req->reason_code, tx, 5339 frame_buf); 5340 ieee80211_destroy_auth_data(sdata, false); 5341 ieee80211_report_disconnect(sdata, frame_buf, 5342 sizeof(frame_buf), true, 5343 req->reason_code); 5344 5345 return 0; 5346 } 5347 5348 if (ifmgd->assoc_data && 5349 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5350 sdata_info(sdata, 5351 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5352 req->bssid, req->reason_code, 5353 ieee80211_get_reason_code_string(req->reason_code)); 5354 5355 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5356 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5357 IEEE80211_STYPE_DEAUTH, 5358 req->reason_code, tx, 5359 frame_buf); 5360 ieee80211_destroy_assoc_data(sdata, false, true); 5361 ieee80211_report_disconnect(sdata, frame_buf, 5362 sizeof(frame_buf), true, 5363 req->reason_code); 5364 return 0; 5365 } 5366 5367 if (ifmgd->associated && 5368 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5369 sdata_info(sdata, 5370 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5371 req->bssid, req->reason_code, 5372 ieee80211_get_reason_code_string(req->reason_code)); 5373 5374 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5375 req->reason_code, tx, frame_buf); 5376 ieee80211_report_disconnect(sdata, frame_buf, 5377 sizeof(frame_buf), true, 5378 req->reason_code); 5379 return 0; 5380 } 5381 5382 return -ENOTCONN; 5383 } 5384 5385 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5386 struct cfg80211_disassoc_request *req) 5387 { 5388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5389 u8 bssid[ETH_ALEN]; 5390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5391 5392 /* 5393 * cfg80211 should catch this ... but it's racy since 5394 * we can receive a disassoc frame, process it, hand it 5395 * to cfg80211 while that's in a locked section already 5396 * trying to tell us that the user wants to disconnect. 5397 */ 5398 if (ifmgd->associated != req->bss) 5399 return -ENOLINK; 5400 5401 sdata_info(sdata, 5402 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5403 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5404 5405 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5406 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5407 req->reason_code, !req->local_state_change, 5408 frame_buf); 5409 5410 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5411 req->reason_code); 5412 5413 return 0; 5414 } 5415 5416 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5417 { 5418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5419 5420 /* 5421 * Make sure some work items will not run after this, 5422 * they will not do anything but might not have been 5423 * cancelled when disconnecting. 5424 */ 5425 cancel_work_sync(&ifmgd->monitor_work); 5426 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5427 cancel_work_sync(&ifmgd->request_smps_work); 5428 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5429 cancel_work_sync(&ifmgd->chswitch_work); 5430 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5431 5432 sdata_lock(sdata); 5433 if (ifmgd->assoc_data) { 5434 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5435 ieee80211_destroy_assoc_data(sdata, false, false); 5436 cfg80211_assoc_timeout(sdata->dev, bss); 5437 } 5438 if (ifmgd->auth_data) 5439 ieee80211_destroy_auth_data(sdata, false); 5440 spin_lock_bh(&ifmgd->teardown_lock); 5441 if (ifmgd->teardown_skb) { 5442 kfree_skb(ifmgd->teardown_skb); 5443 ifmgd->teardown_skb = NULL; 5444 ifmgd->orig_teardown_skb = NULL; 5445 } 5446 spin_unlock_bh(&ifmgd->teardown_lock); 5447 del_timer_sync(&ifmgd->timer); 5448 sdata_unlock(sdata); 5449 } 5450 5451 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5452 enum nl80211_cqm_rssi_threshold_event rssi_event, 5453 s32 rssi_level, 5454 gfp_t gfp) 5455 { 5456 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5457 5458 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5459 5460 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5461 } 5462 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5463 5464 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5465 { 5466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5467 5468 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5469 5470 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5471 } 5472 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5473