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