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(&he_oper_vht_cap, 224 &vht_chandef)) { 225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 226 sdata_info(sdata, 227 "HE AP VHT information is invalid, disable HE\n"); 228 ret = IEEE80211_STA_DISABLE_HE; 229 goto out; 230 } 231 } else if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 233 sdata_info(sdata, 234 "AP VHT information is invalid, disable VHT\n"); 235 ret = IEEE80211_STA_DISABLE_VHT; 236 goto out; 237 } 238 239 if (!cfg80211_chandef_valid(&vht_chandef)) { 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 241 sdata_info(sdata, 242 "AP VHT information is invalid, disable VHT\n"); 243 ret = IEEE80211_STA_DISABLE_VHT; 244 goto out; 245 } 246 247 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 248 ret = 0; 249 goto out; 250 } 251 252 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 253 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 254 sdata_info(sdata, 255 "AP VHT information doesn't match HT, disable VHT\n"); 256 ret = IEEE80211_STA_DISABLE_VHT; 257 goto out; 258 } 259 260 *chandef = vht_chandef; 261 262 ret = 0; 263 264 out: 265 /* 266 * When tracking the current AP, don't do any further checks if the 267 * new chandef is identical to the one we're currently using for the 268 * connection. This keeps us from playing ping-pong with regulatory, 269 * without it the following can happen (for example): 270 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 271 * - AP advertises regdom US 272 * - CRDA loads regdom US with 80 MHz prohibited (old database) 273 * - the code below detects an unsupported channel, downgrades, and 274 * we disconnect from the AP in the caller 275 * - disconnect causes CRDA to reload world regdomain and the game 276 * starts anew. 277 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 278 * 279 * It seems possible that there are still scenarios with CSA or real 280 * bandwidth changes where a this could happen, but those cases are 281 * less common and wouldn't completely prevent using the AP. 282 */ 283 if (tracking && 284 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 285 return ret; 286 287 /* don't print the message below for VHT mismatch if VHT is disabled */ 288 if (ret & IEEE80211_STA_DISABLE_VHT) 289 vht_chandef = *chandef; 290 291 /* 292 * Ignore the DISABLED flag when we're already connected and only 293 * tracking the APs beacon for bandwidth changes - otherwise we 294 * might get disconnected here if we connect to an AP, update our 295 * regulatory information based on the AP's country IE and the 296 * information we have is wrong/outdated and disables the channel 297 * that we're actually using for the connection to the AP. 298 */ 299 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 300 tracking ? 0 : 301 IEEE80211_CHAN_DISABLED)) { 302 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 303 ret = IEEE80211_STA_DISABLE_HT | 304 IEEE80211_STA_DISABLE_VHT; 305 break; 306 } 307 308 ret |= ieee80211_chandef_downgrade(chandef); 309 } 310 311 if (chandef->width != vht_chandef.width && !tracking) 312 sdata_info(sdata, 313 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 314 315 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 316 return ret; 317 } 318 319 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 320 struct sta_info *sta, 321 const struct ieee80211_ht_cap *ht_cap, 322 const struct ieee80211_ht_operation *ht_oper, 323 const struct ieee80211_vht_operation *vht_oper, 324 const struct ieee80211_he_operation *he_oper, 325 const u8 *bssid, u32 *changed) 326 { 327 struct ieee80211_local *local = sdata->local; 328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 329 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 330 struct ieee80211_supported_band *sband = 331 local->hw.wiphy->bands[chan->band]; 332 struct cfg80211_chan_def chandef; 333 u16 ht_opmode; 334 u32 flags; 335 enum ieee80211_sta_rx_bandwidth new_sta_bw; 336 int ret; 337 338 /* if HT was/is disabled, don't track any bandwidth changes */ 339 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 340 return 0; 341 342 /* don't check VHT if we associated as non-VHT station */ 343 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 344 vht_oper = NULL; 345 346 /* don't check HE if we associated as non-HE station */ 347 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 348 !ieee80211_get_he_sta_cap(sband)) 349 he_oper = NULL; 350 351 if (WARN_ON_ONCE(!sta)) 352 return -EINVAL; 353 354 /* 355 * if bss configuration changed store the new one - 356 * this may be applicable even if channel is identical 357 */ 358 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 359 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 360 *changed |= BSS_CHANGED_HT; 361 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 362 } 363 364 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 365 flags = ieee80211_determine_chantype(sdata, sband, chan, 366 ht_oper, vht_oper, he_oper, 367 &chandef, true); 368 369 /* 370 * Downgrade the new channel if we associated with restricted 371 * capabilities. For example, if we associated as a 20 MHz STA 372 * to a 40 MHz AP (due to regulatory, capabilities or config 373 * reasons) then switching to a 40 MHz channel now won't do us 374 * any good -- we couldn't use it with the AP. 375 */ 376 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 377 chandef.width == NL80211_CHAN_WIDTH_80P80) 378 flags |= ieee80211_chandef_downgrade(&chandef); 379 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 380 chandef.width == NL80211_CHAN_WIDTH_160) 381 flags |= ieee80211_chandef_downgrade(&chandef); 382 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 383 chandef.width > NL80211_CHAN_WIDTH_20) 384 flags |= ieee80211_chandef_downgrade(&chandef); 385 386 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 387 return 0; 388 389 sdata_info(sdata, 390 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 391 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 392 chandef.center_freq1, chandef.center_freq2); 393 394 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 395 IEEE80211_STA_DISABLE_VHT | 396 IEEE80211_STA_DISABLE_40MHZ | 397 IEEE80211_STA_DISABLE_80P80MHZ | 398 IEEE80211_STA_DISABLE_160MHZ)) || 399 !cfg80211_chandef_valid(&chandef)) { 400 sdata_info(sdata, 401 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 402 ifmgd->bssid); 403 return -EINVAL; 404 } 405 406 switch (chandef.width) { 407 case NL80211_CHAN_WIDTH_20_NOHT: 408 case NL80211_CHAN_WIDTH_20: 409 new_sta_bw = IEEE80211_STA_RX_BW_20; 410 break; 411 case NL80211_CHAN_WIDTH_40: 412 new_sta_bw = IEEE80211_STA_RX_BW_40; 413 break; 414 case NL80211_CHAN_WIDTH_80: 415 new_sta_bw = IEEE80211_STA_RX_BW_80; 416 break; 417 case NL80211_CHAN_WIDTH_80P80: 418 case NL80211_CHAN_WIDTH_160: 419 new_sta_bw = IEEE80211_STA_RX_BW_160; 420 break; 421 default: 422 return -EINVAL; 423 } 424 425 if (new_sta_bw > sta->cur_max_bandwidth) 426 new_sta_bw = sta->cur_max_bandwidth; 427 428 if (new_sta_bw < sta->sta.bandwidth) { 429 sta->sta.bandwidth = new_sta_bw; 430 rate_control_rate_update(local, sband, sta, 431 IEEE80211_RC_BW_CHANGED); 432 } 433 434 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 435 if (ret) { 436 sdata_info(sdata, 437 "AP %pM changed bandwidth to incompatible one - disconnect\n", 438 ifmgd->bssid); 439 return ret; 440 } 441 442 if (new_sta_bw > sta->sta.bandwidth) { 443 sta->sta.bandwidth = new_sta_bw; 444 rate_control_rate_update(local, sband, sta, 445 IEEE80211_RC_BW_CHANGED); 446 } 447 448 return 0; 449 } 450 451 /* frame sending functions */ 452 453 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 454 struct sk_buff *skb, u8 ap_ht_param, 455 struct ieee80211_supported_band *sband, 456 struct ieee80211_channel *channel, 457 enum ieee80211_smps_mode smps) 458 { 459 u8 *pos; 460 u32 flags = channel->flags; 461 u16 cap; 462 struct ieee80211_sta_ht_cap ht_cap; 463 464 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 465 466 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 467 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 468 469 /* determine capability flags */ 470 cap = ht_cap.cap; 471 472 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 473 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 474 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 475 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 476 cap &= ~IEEE80211_HT_CAP_SGI_40; 477 } 478 break; 479 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 480 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 481 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 482 cap &= ~IEEE80211_HT_CAP_SGI_40; 483 } 484 break; 485 } 486 487 /* 488 * If 40 MHz was disabled associate as though we weren't 489 * capable of 40 MHz -- some broken APs will never fall 490 * back to trying to transmit in 20 MHz. 491 */ 492 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 494 cap &= ~IEEE80211_HT_CAP_SGI_40; 495 } 496 497 /* set SM PS mode properly */ 498 cap &= ~IEEE80211_HT_CAP_SM_PS; 499 switch (smps) { 500 case IEEE80211_SMPS_AUTOMATIC: 501 case IEEE80211_SMPS_NUM_MODES: 502 WARN_ON(1); 503 /* fall through */ 504 case IEEE80211_SMPS_OFF: 505 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 506 IEEE80211_HT_CAP_SM_PS_SHIFT; 507 break; 508 case IEEE80211_SMPS_STATIC: 509 cap |= WLAN_HT_CAP_SM_PS_STATIC << 510 IEEE80211_HT_CAP_SM_PS_SHIFT; 511 break; 512 case IEEE80211_SMPS_DYNAMIC: 513 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 514 IEEE80211_HT_CAP_SM_PS_SHIFT; 515 break; 516 } 517 518 /* reserve and fill IE */ 519 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 520 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 521 } 522 523 /* This function determines vht capability flags for the association 524 * and builds the IE. 525 * Note - the function may set the owner of the MU-MIMO capability 526 */ 527 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 528 struct sk_buff *skb, 529 struct ieee80211_supported_band *sband, 530 struct ieee80211_vht_cap *ap_vht_cap) 531 { 532 struct ieee80211_local *local = sdata->local; 533 u8 *pos; 534 u32 cap; 535 struct ieee80211_sta_vht_cap vht_cap; 536 u32 mask, ap_bf_sts, our_bf_sts; 537 538 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 539 540 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 541 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 542 543 /* determine capability flags */ 544 cap = vht_cap.cap; 545 546 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 547 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 548 549 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 550 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 551 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 552 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 553 } 554 555 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 556 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 557 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 558 } 559 560 /* 561 * Some APs apparently get confused if our capabilities are better 562 * than theirs, so restrict what we advertise in the assoc request. 563 */ 564 if (!(ap_vht_cap->vht_cap_info & 565 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 566 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 567 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 568 else if (!(ap_vht_cap->vht_cap_info & 569 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 572 /* 573 * If some other vif is using the MU-MIMO capablity we cannot associate 574 * using MU-MIMO - this will lead to contradictions in the group-id 575 * mechanism. 576 * Ownership is defined since association request, in order to avoid 577 * simultaneous associations with MU-MIMO. 578 */ 579 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 580 bool disable_mu_mimo = false; 581 struct ieee80211_sub_if_data *other; 582 583 list_for_each_entry_rcu(other, &local->interfaces, list) { 584 if (other->vif.mu_mimo_owner) { 585 disable_mu_mimo = true; 586 break; 587 } 588 } 589 if (disable_mu_mimo) 590 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 591 else 592 sdata->vif.mu_mimo_owner = true; 593 } 594 595 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 596 597 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 598 our_bf_sts = cap & mask; 599 600 if (ap_bf_sts < our_bf_sts) { 601 cap &= ~mask; 602 cap |= ap_bf_sts; 603 } 604 605 /* reserve and fill IE */ 606 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 607 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 608 } 609 610 /* This function determines HE capability flags for the association 611 * and builds the IE. 612 */ 613 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 614 struct sk_buff *skb, 615 struct ieee80211_supported_band *sband) 616 { 617 u8 *pos; 618 const struct ieee80211_sta_he_cap *he_cap = NULL; 619 u8 he_cap_size; 620 621 he_cap = ieee80211_get_he_sta_cap(sband); 622 if (!he_cap) 623 return; 624 625 /* 626 * TODO: the 1 added is because this temporarily is under the EXTENSION 627 * IE. Get rid of it when it moves. 628 */ 629 he_cap_size = 630 2 + 1 + sizeof(he_cap->he_cap_elem) + 631 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 632 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 633 he_cap->he_cap_elem.phy_cap_info); 634 pos = skb_put(skb, he_cap_size); 635 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 636 } 637 638 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 639 { 640 struct ieee80211_local *local = sdata->local; 641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 642 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 643 struct sk_buff *skb; 644 struct ieee80211_mgmt *mgmt; 645 u8 *pos, qos_info; 646 size_t offset = 0, noffset; 647 int i, count, rates_len, supp_rates_len, shift; 648 u16 capab; 649 struct ieee80211_supported_band *sband; 650 struct ieee80211_chanctx_conf *chanctx_conf; 651 struct ieee80211_channel *chan; 652 u32 rates = 0; 653 654 sdata_assert_lock(sdata); 655 656 rcu_read_lock(); 657 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 658 if (WARN_ON(!chanctx_conf)) { 659 rcu_read_unlock(); 660 return; 661 } 662 chan = chanctx_conf->def.chan; 663 rcu_read_unlock(); 664 sband = local->hw.wiphy->bands[chan->band]; 665 shift = ieee80211_vif_get_shift(&sdata->vif); 666 667 if (assoc_data->supp_rates_len) { 668 /* 669 * Get all rates supported by the device and the AP as 670 * some APs don't like getting a superset of their rates 671 * in the association request (e.g. D-Link DAP 1353 in 672 * b-only mode)... 673 */ 674 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 675 assoc_data->supp_rates, 676 assoc_data->supp_rates_len, 677 &rates); 678 } else { 679 /* 680 * In case AP not provide any supported rates information 681 * before association, we send information element(s) with 682 * all rates that we support. 683 */ 684 rates_len = 0; 685 for (i = 0; i < sband->n_bitrates; i++) { 686 rates |= BIT(i); 687 rates_len++; 688 } 689 } 690 691 skb = alloc_skb(local->hw.extra_tx_headroom + 692 sizeof(*mgmt) + /* bit too much but doesn't matter */ 693 2 + assoc_data->ssid_len + /* SSID */ 694 4 + rates_len + /* (extended) rates */ 695 4 + /* power capability */ 696 2 + 2 * sband->n_channels + /* supported channels */ 697 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 698 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 699 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 700 sizeof(struct ieee80211_he_mcs_nss_supp) + 701 IEEE80211_HE_PPE_THRES_MAX_LEN + 702 assoc_data->ie_len + /* extra IEs */ 703 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 704 9, /* WMM */ 705 GFP_KERNEL); 706 if (!skb) 707 return; 708 709 skb_reserve(skb, local->hw.extra_tx_headroom); 710 711 capab = WLAN_CAPABILITY_ESS; 712 713 if (sband->band == NL80211_BAND_2GHZ) { 714 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 715 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 716 } 717 718 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 719 capab |= WLAN_CAPABILITY_PRIVACY; 720 721 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 722 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 723 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 724 725 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 726 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 727 728 mgmt = skb_put_zero(skb, 24); 729 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 731 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 732 733 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 734 skb_put(skb, 10); 735 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 736 IEEE80211_STYPE_REASSOC_REQ); 737 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 738 mgmt->u.reassoc_req.listen_interval = 739 cpu_to_le16(local->hw.conf.listen_interval); 740 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 741 ETH_ALEN); 742 } else { 743 skb_put(skb, 4); 744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 745 IEEE80211_STYPE_ASSOC_REQ); 746 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 747 mgmt->u.assoc_req.listen_interval = 748 cpu_to_le16(local->hw.conf.listen_interval); 749 } 750 751 /* SSID */ 752 pos = skb_put(skb, 2 + assoc_data->ssid_len); 753 *pos++ = WLAN_EID_SSID; 754 *pos++ = assoc_data->ssid_len; 755 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 756 757 /* add all rates which were marked to be used above */ 758 supp_rates_len = rates_len; 759 if (supp_rates_len > 8) 760 supp_rates_len = 8; 761 762 pos = skb_put(skb, supp_rates_len + 2); 763 *pos++ = WLAN_EID_SUPP_RATES; 764 *pos++ = supp_rates_len; 765 766 count = 0; 767 for (i = 0; i < sband->n_bitrates; i++) { 768 if (BIT(i) & rates) { 769 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 770 5 * (1 << shift)); 771 *pos++ = (u8) rate; 772 if (++count == 8) 773 break; 774 } 775 } 776 777 if (rates_len > count) { 778 pos = skb_put(skb, rates_len - count + 2); 779 *pos++ = WLAN_EID_EXT_SUPP_RATES; 780 *pos++ = rates_len - count; 781 782 for (i++; i < sband->n_bitrates; i++) { 783 if (BIT(i) & rates) { 784 int rate; 785 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 786 5 * (1 << shift)); 787 *pos++ = (u8) rate; 788 } 789 } 790 } 791 792 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 793 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 794 pos = skb_put(skb, 4); 795 *pos++ = WLAN_EID_PWR_CAPABILITY; 796 *pos++ = 2; 797 *pos++ = 0; /* min tx power */ 798 /* max tx power */ 799 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 800 } 801 802 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 803 /* TODO: get this in reg domain format */ 804 pos = skb_put(skb, 2 * sband->n_channels + 2); 805 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 806 *pos++ = 2 * sband->n_channels; 807 for (i = 0; i < sband->n_channels; i++) { 808 *pos++ = ieee80211_frequency_to_channel( 809 sband->channels[i].center_freq); 810 *pos++ = 1; /* one channel in the subband*/ 811 } 812 } 813 814 /* if present, add any custom IEs that go before HT */ 815 if (assoc_data->ie_len) { 816 static const u8 before_ht[] = { 817 WLAN_EID_SSID, 818 WLAN_EID_SUPP_RATES, 819 WLAN_EID_EXT_SUPP_RATES, 820 WLAN_EID_PWR_CAPABILITY, 821 WLAN_EID_SUPPORTED_CHANNELS, 822 WLAN_EID_RSN, 823 WLAN_EID_QOS_CAPA, 824 WLAN_EID_RRM_ENABLED_CAPABILITIES, 825 WLAN_EID_MOBILITY_DOMAIN, 826 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 827 WLAN_EID_RIC_DATA, /* reassoc only */ 828 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 829 }; 830 static const u8 after_ric[] = { 831 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 832 WLAN_EID_HT_CAPABILITY, 833 WLAN_EID_BSS_COEX_2040, 834 /* luckily this is almost always there */ 835 WLAN_EID_EXT_CAPABILITY, 836 WLAN_EID_QOS_TRAFFIC_CAPA, 837 WLAN_EID_TIM_BCAST_REQ, 838 WLAN_EID_INTERWORKING, 839 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 840 WLAN_EID_VHT_CAPABILITY, 841 WLAN_EID_OPMODE_NOTIF, 842 }; 843 844 noffset = ieee80211_ie_split_ric(assoc_data->ie, 845 assoc_data->ie_len, 846 before_ht, 847 ARRAY_SIZE(before_ht), 848 after_ric, 849 ARRAY_SIZE(after_ric), 850 offset); 851 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 852 offset = noffset; 853 } 854 855 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 856 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 858 859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 860 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 861 sband, chan, sdata->smps_mode); 862 863 /* if present, add any custom IEs that go before VHT */ 864 if (assoc_data->ie_len) { 865 static const u8 before_vht[] = { 866 /* 867 * no need to list the ones split off before HT 868 * or generated here 869 */ 870 WLAN_EID_BSS_COEX_2040, 871 WLAN_EID_EXT_CAPABILITY, 872 WLAN_EID_QOS_TRAFFIC_CAPA, 873 WLAN_EID_TIM_BCAST_REQ, 874 WLAN_EID_INTERWORKING, 875 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 876 }; 877 878 /* RIC already taken above, so no need to handle here anymore */ 879 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 880 before_vht, ARRAY_SIZE(before_vht), 881 offset); 882 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 883 offset = noffset; 884 } 885 886 /* if present, add any custom IEs that go before HE */ 887 if (assoc_data->ie_len) { 888 static const u8 before_he[] = { 889 /* 890 * no need to list the ones split off before VHT 891 * or generated here 892 */ 893 WLAN_EID_OPMODE_NOTIF, 894 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 895 /* 11ai elements */ 896 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 897 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 898 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 899 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 900 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 901 /* TODO: add 11ah/11aj/11ak elements */ 902 }; 903 904 /* RIC already taken above, so no need to handle here anymore */ 905 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 906 before_he, ARRAY_SIZE(before_he), 907 offset); 908 pos = skb_put(skb, noffset - offset); 909 memcpy(pos, assoc_data->ie + offset, noffset - offset); 910 offset = noffset; 911 } 912 913 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 914 ieee80211_add_vht_ie(sdata, skb, sband, 915 &assoc_data->ap_vht_cap); 916 917 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 918 ieee80211_add_he_ie(sdata, skb, sband); 919 920 /* if present, add any custom non-vendor IEs that go after HE */ 921 if (assoc_data->ie_len) { 922 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 923 assoc_data->ie_len, 924 offset); 925 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 926 offset = noffset; 927 } 928 929 if (assoc_data->wmm) { 930 if (assoc_data->uapsd) { 931 qos_info = ifmgd->uapsd_queues; 932 qos_info |= (ifmgd->uapsd_max_sp_len << 933 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 934 } else { 935 qos_info = 0; 936 } 937 938 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 939 } 940 941 /* add any remaining custom (i.e. vendor specific here) IEs */ 942 if (assoc_data->ie_len) { 943 noffset = assoc_data->ie_len; 944 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 945 } 946 947 if (assoc_data->fils_kek_len && 948 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 949 dev_kfree_skb(skb); 950 return; 951 } 952 953 drv_mgd_prepare_tx(local, sdata, 0); 954 955 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 956 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 957 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 958 IEEE80211_TX_INTFL_MLME_CONN_TX; 959 ieee80211_tx_skb(sdata, skb); 960 } 961 962 void ieee80211_send_pspoll(struct ieee80211_local *local, 963 struct ieee80211_sub_if_data *sdata) 964 { 965 struct ieee80211_pspoll *pspoll; 966 struct sk_buff *skb; 967 968 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 969 if (!skb) 970 return; 971 972 pspoll = (struct ieee80211_pspoll *) skb->data; 973 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 974 975 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 976 ieee80211_tx_skb(sdata, skb); 977 } 978 979 void ieee80211_send_nullfunc(struct ieee80211_local *local, 980 struct ieee80211_sub_if_data *sdata, 981 bool powersave) 982 { 983 struct sk_buff *skb; 984 struct ieee80211_hdr_3addr *nullfunc; 985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 986 987 /* Don't send NDPs when STA is connected HE */ 988 if (sdata->vif.type == NL80211_IFTYPE_STATION && 989 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 990 return; 991 992 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 993 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 994 if (!skb) 995 return; 996 997 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 998 if (powersave) 999 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1000 1001 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1002 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1003 1004 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1005 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1006 1007 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1008 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1009 1010 ieee80211_tx_skb(sdata, skb); 1011 } 1012 1013 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1014 struct ieee80211_sub_if_data *sdata) 1015 { 1016 struct sk_buff *skb; 1017 struct ieee80211_hdr *nullfunc; 1018 __le16 fc; 1019 1020 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1021 return; 1022 1023 /* Don't send NDPs when connected HE */ 1024 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1025 return; 1026 1027 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1028 if (!skb) 1029 return; 1030 1031 skb_reserve(skb, local->hw.extra_tx_headroom); 1032 1033 nullfunc = skb_put_zero(skb, 30); 1034 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1035 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1036 nullfunc->frame_control = fc; 1037 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1038 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1039 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1040 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1041 1042 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1043 ieee80211_tx_skb(sdata, skb); 1044 } 1045 1046 /* spectrum management related things */ 1047 static void ieee80211_chswitch_work(struct work_struct *work) 1048 { 1049 struct ieee80211_sub_if_data *sdata = 1050 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1051 struct ieee80211_local *local = sdata->local; 1052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1053 int ret; 1054 1055 if (!ieee80211_sdata_running(sdata)) 1056 return; 1057 1058 sdata_lock(sdata); 1059 mutex_lock(&local->mtx); 1060 mutex_lock(&local->chanctx_mtx); 1061 1062 if (!ifmgd->associated) 1063 goto out; 1064 1065 if (!sdata->vif.csa_active) 1066 goto out; 1067 1068 /* 1069 * using reservation isn't immediate as it may be deferred until later 1070 * with multi-vif. once reservation is complete it will re-schedule the 1071 * work with no reserved_chanctx so verify chandef to check if it 1072 * completed successfully 1073 */ 1074 1075 if (sdata->reserved_chanctx) { 1076 /* 1077 * with multi-vif csa driver may call ieee80211_csa_finish() 1078 * many times while waiting for other interfaces to use their 1079 * reservations 1080 */ 1081 if (sdata->reserved_ready) 1082 goto out; 1083 1084 ret = ieee80211_vif_use_reserved_context(sdata); 1085 if (ret) { 1086 sdata_info(sdata, 1087 "failed to use reserved channel context, disconnecting (err=%d)\n", 1088 ret); 1089 ieee80211_queue_work(&sdata->local->hw, 1090 &ifmgd->csa_connection_drop_work); 1091 goto out; 1092 } 1093 1094 goto out; 1095 } 1096 1097 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1098 &sdata->csa_chandef)) { 1099 sdata_info(sdata, 1100 "failed to finalize channel switch, disconnecting\n"); 1101 ieee80211_queue_work(&sdata->local->hw, 1102 &ifmgd->csa_connection_drop_work); 1103 goto out; 1104 } 1105 1106 /* XXX: shouldn't really modify cfg80211-owned data! */ 1107 ifmgd->associated->channel = sdata->csa_chandef.chan; 1108 1109 ifmgd->csa_waiting_bcn = true; 1110 1111 ieee80211_sta_reset_beacon_monitor(sdata); 1112 ieee80211_sta_reset_conn_monitor(sdata); 1113 1114 out: 1115 mutex_unlock(&local->chanctx_mtx); 1116 mutex_unlock(&local->mtx); 1117 sdata_unlock(sdata); 1118 } 1119 1120 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1121 { 1122 struct ieee80211_local *local = sdata->local; 1123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1124 int ret; 1125 1126 sdata_assert_lock(sdata); 1127 1128 WARN_ON(!sdata->vif.csa_active); 1129 1130 if (sdata->csa_block_tx) { 1131 ieee80211_wake_vif_queues(local, sdata, 1132 IEEE80211_QUEUE_STOP_REASON_CSA); 1133 sdata->csa_block_tx = false; 1134 } 1135 1136 sdata->vif.csa_active = false; 1137 ifmgd->csa_waiting_bcn = false; 1138 1139 ret = drv_post_channel_switch(sdata); 1140 if (ret) { 1141 sdata_info(sdata, 1142 "driver post channel switch failed, disconnecting\n"); 1143 ieee80211_queue_work(&local->hw, 1144 &ifmgd->csa_connection_drop_work); 1145 return; 1146 } 1147 1148 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1149 } 1150 1151 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1152 { 1153 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1155 1156 trace_api_chswitch_done(sdata, success); 1157 if (!success) { 1158 sdata_info(sdata, 1159 "driver channel switch failed, disconnecting\n"); 1160 ieee80211_queue_work(&sdata->local->hw, 1161 &ifmgd->csa_connection_drop_work); 1162 } else { 1163 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1164 } 1165 } 1166 EXPORT_SYMBOL(ieee80211_chswitch_done); 1167 1168 static void ieee80211_chswitch_timer(struct timer_list *t) 1169 { 1170 struct ieee80211_sub_if_data *sdata = 1171 from_timer(sdata, t, u.mgd.chswitch_timer); 1172 1173 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1174 } 1175 1176 static void 1177 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1178 u64 timestamp, u32 device_timestamp, 1179 struct ieee802_11_elems *elems, 1180 bool beacon) 1181 { 1182 struct ieee80211_local *local = sdata->local; 1183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1184 struct cfg80211_bss *cbss = ifmgd->associated; 1185 struct ieee80211_chanctx_conf *conf; 1186 struct ieee80211_chanctx *chanctx; 1187 enum nl80211_band current_band; 1188 struct ieee80211_csa_ie csa_ie; 1189 struct ieee80211_channel_switch ch_switch; 1190 int res; 1191 1192 sdata_assert_lock(sdata); 1193 1194 if (!cbss) 1195 return; 1196 1197 if (local->scanning) 1198 return; 1199 1200 /* disregard subsequent announcements if we are already processing */ 1201 if (sdata->vif.csa_active) 1202 return; 1203 1204 current_band = cbss->channel->band; 1205 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1206 ifmgd->flags, 1207 ifmgd->associated->bssid, &csa_ie); 1208 if (res < 0) 1209 ieee80211_queue_work(&local->hw, 1210 &ifmgd->csa_connection_drop_work); 1211 if (res) 1212 return; 1213 1214 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1215 IEEE80211_CHAN_DISABLED)) { 1216 sdata_info(sdata, 1217 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1218 ifmgd->associated->bssid, 1219 csa_ie.chandef.chan->center_freq, 1220 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1221 csa_ie.chandef.center_freq2); 1222 ieee80211_queue_work(&local->hw, 1223 &ifmgd->csa_connection_drop_work); 1224 return; 1225 } 1226 1227 if (cfg80211_chandef_identical(&csa_ie.chandef, 1228 &sdata->vif.bss_conf.chandef)) { 1229 if (ifmgd->csa_ignored_same_chan) 1230 return; 1231 sdata_info(sdata, 1232 "AP %pM tries to chanswitch to same channel, ignore\n", 1233 ifmgd->associated->bssid); 1234 ifmgd->csa_ignored_same_chan = true; 1235 return; 1236 } 1237 1238 /* 1239 * Drop all TDLS peers - either we disconnect or move to a different 1240 * channel from this point on. There's no telling what our peer will do. 1241 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1242 * have an incompatible wider chandef. 1243 */ 1244 ieee80211_teardown_tdls_peers(sdata); 1245 1246 mutex_lock(&local->mtx); 1247 mutex_lock(&local->chanctx_mtx); 1248 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1249 lockdep_is_held(&local->chanctx_mtx)); 1250 if (!conf) { 1251 sdata_info(sdata, 1252 "no channel context assigned to vif?, disconnecting\n"); 1253 goto drop_connection; 1254 } 1255 1256 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1257 1258 if (local->use_chanctx && 1259 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1260 sdata_info(sdata, 1261 "driver doesn't support chan-switch with channel contexts\n"); 1262 goto drop_connection; 1263 } 1264 1265 ch_switch.timestamp = timestamp; 1266 ch_switch.device_timestamp = device_timestamp; 1267 ch_switch.block_tx = csa_ie.mode; 1268 ch_switch.chandef = csa_ie.chandef; 1269 ch_switch.count = csa_ie.count; 1270 1271 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1272 sdata_info(sdata, 1273 "preparing for channel switch failed, disconnecting\n"); 1274 goto drop_connection; 1275 } 1276 1277 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1278 chanctx->mode, false); 1279 if (res) { 1280 sdata_info(sdata, 1281 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1282 res); 1283 goto drop_connection; 1284 } 1285 mutex_unlock(&local->chanctx_mtx); 1286 1287 sdata->vif.csa_active = true; 1288 sdata->csa_chandef = csa_ie.chandef; 1289 sdata->csa_block_tx = csa_ie.mode; 1290 ifmgd->csa_ignored_same_chan = false; 1291 1292 if (sdata->csa_block_tx) 1293 ieee80211_stop_vif_queues(local, sdata, 1294 IEEE80211_QUEUE_STOP_REASON_CSA); 1295 mutex_unlock(&local->mtx); 1296 1297 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1298 csa_ie.count); 1299 1300 if (local->ops->channel_switch) { 1301 /* use driver's channel switch callback */ 1302 drv_channel_switch(local, sdata, &ch_switch); 1303 return; 1304 } 1305 1306 /* channel switch handled in software */ 1307 if (csa_ie.count <= 1) 1308 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1309 else 1310 mod_timer(&ifmgd->chswitch_timer, 1311 TU_TO_EXP_TIME((csa_ie.count - 1) * 1312 cbss->beacon_interval)); 1313 return; 1314 drop_connection: 1315 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1316 mutex_unlock(&local->chanctx_mtx); 1317 mutex_unlock(&local->mtx); 1318 } 1319 1320 static bool 1321 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1322 struct ieee80211_channel *channel, 1323 const u8 *country_ie, u8 country_ie_len, 1324 const u8 *pwr_constr_elem, 1325 int *chan_pwr, int *pwr_reduction) 1326 { 1327 struct ieee80211_country_ie_triplet *triplet; 1328 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1329 int i, chan_increment; 1330 bool have_chan_pwr = false; 1331 1332 /* Invalid IE */ 1333 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1334 return false; 1335 1336 triplet = (void *)(country_ie + 3); 1337 country_ie_len -= 3; 1338 1339 switch (channel->band) { 1340 default: 1341 WARN_ON_ONCE(1); 1342 /* fall through */ 1343 case NL80211_BAND_2GHZ: 1344 case NL80211_BAND_60GHZ: 1345 chan_increment = 1; 1346 break; 1347 case NL80211_BAND_5GHZ: 1348 chan_increment = 4; 1349 break; 1350 } 1351 1352 /* find channel */ 1353 while (country_ie_len >= 3) { 1354 u8 first_channel = triplet->chans.first_channel; 1355 1356 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1357 goto next; 1358 1359 for (i = 0; i < triplet->chans.num_channels; i++) { 1360 if (first_channel + i * chan_increment == chan) { 1361 have_chan_pwr = true; 1362 *chan_pwr = triplet->chans.max_power; 1363 break; 1364 } 1365 } 1366 if (have_chan_pwr) 1367 break; 1368 1369 next: 1370 triplet++; 1371 country_ie_len -= 3; 1372 } 1373 1374 if (have_chan_pwr && pwr_constr_elem) 1375 *pwr_reduction = *pwr_constr_elem; 1376 else 1377 *pwr_reduction = 0; 1378 1379 return have_chan_pwr; 1380 } 1381 1382 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1383 struct ieee80211_channel *channel, 1384 const u8 *cisco_dtpc_ie, 1385 int *pwr_level) 1386 { 1387 /* From practical testing, the first data byte of the DTPC element 1388 * seems to contain the requested dBm level, and the CLI on Cisco 1389 * APs clearly state the range is -127 to 127 dBm, which indicates 1390 * a signed byte, although it seemingly never actually goes negative. 1391 * The other byte seems to always be zero. 1392 */ 1393 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1394 } 1395 1396 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1397 struct ieee80211_channel *channel, 1398 struct ieee80211_mgmt *mgmt, 1399 const u8 *country_ie, u8 country_ie_len, 1400 const u8 *pwr_constr_ie, 1401 const u8 *cisco_dtpc_ie) 1402 { 1403 bool has_80211h_pwr = false, has_cisco_pwr = false; 1404 int chan_pwr = 0, pwr_reduction_80211h = 0; 1405 int pwr_level_cisco, pwr_level_80211h; 1406 int new_ap_level; 1407 __le16 capab = mgmt->u.probe_resp.capab_info; 1408 1409 if (country_ie && 1410 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1411 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1412 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1413 sdata, channel, country_ie, country_ie_len, 1414 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1415 pwr_level_80211h = 1416 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1417 } 1418 1419 if (cisco_dtpc_ie) { 1420 ieee80211_find_cisco_dtpc( 1421 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1422 has_cisco_pwr = true; 1423 } 1424 1425 if (!has_80211h_pwr && !has_cisco_pwr) 1426 return 0; 1427 1428 /* If we have both 802.11h and Cisco DTPC, apply both limits 1429 * by picking the smallest of the two power levels advertised. 1430 */ 1431 if (has_80211h_pwr && 1432 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1433 new_ap_level = pwr_level_80211h; 1434 1435 if (sdata->ap_power_level == new_ap_level) 1436 return 0; 1437 1438 sdata_dbg(sdata, 1439 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1440 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1441 sdata->u.mgd.bssid); 1442 } else { /* has_cisco_pwr is always true here. */ 1443 new_ap_level = pwr_level_cisco; 1444 1445 if (sdata->ap_power_level == new_ap_level) 1446 return 0; 1447 1448 sdata_dbg(sdata, 1449 "Limiting TX power to %d dBm as advertised by %pM\n", 1450 pwr_level_cisco, sdata->u.mgd.bssid); 1451 } 1452 1453 sdata->ap_power_level = new_ap_level; 1454 if (__ieee80211_recalc_txpower(sdata)) 1455 return BSS_CHANGED_TXPOWER; 1456 return 0; 1457 } 1458 1459 /* powersave */ 1460 static void ieee80211_enable_ps(struct ieee80211_local *local, 1461 struct ieee80211_sub_if_data *sdata) 1462 { 1463 struct ieee80211_conf *conf = &local->hw.conf; 1464 1465 /* 1466 * If we are scanning right now then the parameters will 1467 * take effect when scan finishes. 1468 */ 1469 if (local->scanning) 1470 return; 1471 1472 if (conf->dynamic_ps_timeout > 0 && 1473 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1474 mod_timer(&local->dynamic_ps_timer, jiffies + 1475 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1476 } else { 1477 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1478 ieee80211_send_nullfunc(local, sdata, true); 1479 1480 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1481 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1482 return; 1483 1484 conf->flags |= IEEE80211_CONF_PS; 1485 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1486 } 1487 } 1488 1489 static void ieee80211_change_ps(struct ieee80211_local *local) 1490 { 1491 struct ieee80211_conf *conf = &local->hw.conf; 1492 1493 if (local->ps_sdata) { 1494 ieee80211_enable_ps(local, local->ps_sdata); 1495 } else if (conf->flags & IEEE80211_CONF_PS) { 1496 conf->flags &= ~IEEE80211_CONF_PS; 1497 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1498 del_timer_sync(&local->dynamic_ps_timer); 1499 cancel_work_sync(&local->dynamic_ps_enable_work); 1500 } 1501 } 1502 1503 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1504 { 1505 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1506 struct sta_info *sta = NULL; 1507 bool authorized = false; 1508 1509 if (!mgd->powersave) 1510 return false; 1511 1512 if (mgd->broken_ap) 1513 return false; 1514 1515 if (!mgd->associated) 1516 return false; 1517 1518 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1519 return false; 1520 1521 if (!mgd->have_beacon) 1522 return false; 1523 1524 rcu_read_lock(); 1525 sta = sta_info_get(sdata, mgd->bssid); 1526 if (sta) 1527 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1528 rcu_read_unlock(); 1529 1530 return authorized; 1531 } 1532 1533 /* need to hold RTNL or interface lock */ 1534 void ieee80211_recalc_ps(struct ieee80211_local *local) 1535 { 1536 struct ieee80211_sub_if_data *sdata, *found = NULL; 1537 int count = 0; 1538 int timeout; 1539 1540 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1541 local->ps_sdata = NULL; 1542 return; 1543 } 1544 1545 list_for_each_entry(sdata, &local->interfaces, list) { 1546 if (!ieee80211_sdata_running(sdata)) 1547 continue; 1548 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1549 /* If an AP vif is found, then disable PS 1550 * by setting the count to zero thereby setting 1551 * ps_sdata to NULL. 1552 */ 1553 count = 0; 1554 break; 1555 } 1556 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1557 continue; 1558 found = sdata; 1559 count++; 1560 } 1561 1562 if (count == 1 && ieee80211_powersave_allowed(found)) { 1563 u8 dtimper = found->u.mgd.dtim_period; 1564 1565 timeout = local->dynamic_ps_forced_timeout; 1566 if (timeout < 0) 1567 timeout = 100; 1568 local->hw.conf.dynamic_ps_timeout = timeout; 1569 1570 /* If the TIM IE is invalid, pretend the value is 1 */ 1571 if (!dtimper) 1572 dtimper = 1; 1573 1574 local->hw.conf.ps_dtim_period = dtimper; 1575 local->ps_sdata = found; 1576 } else { 1577 local->ps_sdata = NULL; 1578 } 1579 1580 ieee80211_change_ps(local); 1581 } 1582 1583 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1584 { 1585 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1586 1587 if (sdata->vif.bss_conf.ps != ps_allowed) { 1588 sdata->vif.bss_conf.ps = ps_allowed; 1589 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1590 } 1591 } 1592 1593 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1594 { 1595 struct ieee80211_local *local = 1596 container_of(work, struct ieee80211_local, 1597 dynamic_ps_disable_work); 1598 1599 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1600 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1601 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1602 } 1603 1604 ieee80211_wake_queues_by_reason(&local->hw, 1605 IEEE80211_MAX_QUEUE_MAP, 1606 IEEE80211_QUEUE_STOP_REASON_PS, 1607 false); 1608 } 1609 1610 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1611 { 1612 struct ieee80211_local *local = 1613 container_of(work, struct ieee80211_local, 1614 dynamic_ps_enable_work); 1615 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1616 struct ieee80211_if_managed *ifmgd; 1617 unsigned long flags; 1618 int q; 1619 1620 /* can only happen when PS was just disabled anyway */ 1621 if (!sdata) 1622 return; 1623 1624 ifmgd = &sdata->u.mgd; 1625 1626 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1627 return; 1628 1629 if (local->hw.conf.dynamic_ps_timeout > 0) { 1630 /* don't enter PS if TX frames are pending */ 1631 if (drv_tx_frames_pending(local)) { 1632 mod_timer(&local->dynamic_ps_timer, jiffies + 1633 msecs_to_jiffies( 1634 local->hw.conf.dynamic_ps_timeout)); 1635 return; 1636 } 1637 1638 /* 1639 * transmission can be stopped by others which leads to 1640 * dynamic_ps_timer expiry. Postpone the ps timer if it 1641 * is not the actual idle state. 1642 */ 1643 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1644 for (q = 0; q < local->hw.queues; q++) { 1645 if (local->queue_stop_reasons[q]) { 1646 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1647 flags); 1648 mod_timer(&local->dynamic_ps_timer, jiffies + 1649 msecs_to_jiffies( 1650 local->hw.conf.dynamic_ps_timeout)); 1651 return; 1652 } 1653 } 1654 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1655 } 1656 1657 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1658 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1659 if (drv_tx_frames_pending(local)) { 1660 mod_timer(&local->dynamic_ps_timer, jiffies + 1661 msecs_to_jiffies( 1662 local->hw.conf.dynamic_ps_timeout)); 1663 } else { 1664 ieee80211_send_nullfunc(local, sdata, true); 1665 /* Flush to get the tx status of nullfunc frame */ 1666 ieee80211_flush_queues(local, sdata, false); 1667 } 1668 } 1669 1670 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1671 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1672 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1673 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1674 local->hw.conf.flags |= IEEE80211_CONF_PS; 1675 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1676 } 1677 } 1678 1679 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1680 { 1681 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1682 1683 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1684 } 1685 1686 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1687 { 1688 struct delayed_work *delayed_work = to_delayed_work(work); 1689 struct ieee80211_sub_if_data *sdata = 1690 container_of(delayed_work, struct ieee80211_sub_if_data, 1691 dfs_cac_timer_work); 1692 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1693 1694 mutex_lock(&sdata->local->mtx); 1695 if (sdata->wdev.cac_started) { 1696 ieee80211_vif_release_channel(sdata); 1697 cfg80211_cac_event(sdata->dev, &chandef, 1698 NL80211_RADAR_CAC_FINISHED, 1699 GFP_KERNEL); 1700 } 1701 mutex_unlock(&sdata->local->mtx); 1702 } 1703 1704 static bool 1705 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1706 { 1707 struct ieee80211_local *local = sdata->local; 1708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1709 bool ret = false; 1710 int ac; 1711 1712 if (local->hw.queues < IEEE80211_NUM_ACS) 1713 return false; 1714 1715 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1716 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1717 int non_acm_ac; 1718 unsigned long now = jiffies; 1719 1720 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1721 tx_tspec->admitted_time && 1722 time_after(now, tx_tspec->time_slice_start + HZ)) { 1723 tx_tspec->consumed_tx_time = 0; 1724 tx_tspec->time_slice_start = now; 1725 1726 if (tx_tspec->downgraded) 1727 tx_tspec->action = 1728 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1729 } 1730 1731 switch (tx_tspec->action) { 1732 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1733 /* take the original parameters */ 1734 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1735 sdata_err(sdata, 1736 "failed to set TX queue parameters for queue %d\n", 1737 ac); 1738 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1739 tx_tspec->downgraded = false; 1740 ret = true; 1741 break; 1742 case TX_TSPEC_ACTION_DOWNGRADE: 1743 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1744 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1745 ret = true; 1746 break; 1747 } 1748 /* downgrade next lower non-ACM AC */ 1749 for (non_acm_ac = ac + 1; 1750 non_acm_ac < IEEE80211_NUM_ACS; 1751 non_acm_ac++) 1752 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1753 break; 1754 /* Usually the loop will result in using BK even if it 1755 * requires admission control, but such a configuration 1756 * makes no sense and we have to transmit somehow - the 1757 * AC selection does the same thing. 1758 * If we started out trying to downgrade from BK, then 1759 * the extra condition here might be needed. 1760 */ 1761 if (non_acm_ac >= IEEE80211_NUM_ACS) 1762 non_acm_ac = IEEE80211_AC_BK; 1763 if (drv_conf_tx(local, sdata, ac, 1764 &sdata->tx_conf[non_acm_ac])) 1765 sdata_err(sdata, 1766 "failed to set TX queue parameters for queue %d\n", 1767 ac); 1768 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1769 ret = true; 1770 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1771 tx_tspec->time_slice_start + HZ - now + 1); 1772 break; 1773 case TX_TSPEC_ACTION_NONE: 1774 /* nothing now */ 1775 break; 1776 } 1777 } 1778 1779 return ret; 1780 } 1781 1782 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1783 { 1784 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1785 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1786 } 1787 1788 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1789 { 1790 struct ieee80211_sub_if_data *sdata; 1791 1792 sdata = container_of(work, struct ieee80211_sub_if_data, 1793 u.mgd.tx_tspec_wk.work); 1794 ieee80211_sta_handle_tspec_ac_params(sdata); 1795 } 1796 1797 /* MLME */ 1798 static bool 1799 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1800 struct ieee80211_sub_if_data *sdata, 1801 const u8 *wmm_param, size_t wmm_param_len, 1802 const struct ieee80211_mu_edca_param_set *mu_edca) 1803 { 1804 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1805 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1806 size_t left; 1807 int count, ac; 1808 const u8 *pos; 1809 u8 uapsd_queues = 0; 1810 1811 if (!local->ops->conf_tx) 1812 return false; 1813 1814 if (local->hw.queues < IEEE80211_NUM_ACS) 1815 return false; 1816 1817 if (!wmm_param) 1818 return false; 1819 1820 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1821 return false; 1822 1823 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1824 uapsd_queues = ifmgd->uapsd_queues; 1825 1826 count = wmm_param[6] & 0x0f; 1827 if (count == ifmgd->wmm_last_param_set) 1828 return false; 1829 ifmgd->wmm_last_param_set = count; 1830 1831 pos = wmm_param + 8; 1832 left = wmm_param_len - 8; 1833 1834 memset(¶ms, 0, sizeof(params)); 1835 1836 sdata->wmm_acm = 0; 1837 for (; left >= 4; left -= 4, pos += 4) { 1838 int aci = (pos[0] >> 5) & 0x03; 1839 int acm = (pos[0] >> 4) & 0x01; 1840 bool uapsd = false; 1841 1842 switch (aci) { 1843 case 1: /* AC_BK */ 1844 ac = IEEE80211_AC_BK; 1845 if (acm) 1846 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1847 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1848 uapsd = true; 1849 params[ac].mu_edca = !!mu_edca; 1850 if (mu_edca) 1851 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1852 break; 1853 case 2: /* AC_VI */ 1854 ac = IEEE80211_AC_VI; 1855 if (acm) 1856 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1857 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1858 uapsd = true; 1859 params[ac].mu_edca = !!mu_edca; 1860 if (mu_edca) 1861 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1862 break; 1863 case 3: /* AC_VO */ 1864 ac = IEEE80211_AC_VO; 1865 if (acm) 1866 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1867 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1868 uapsd = true; 1869 params[ac].mu_edca = !!mu_edca; 1870 if (mu_edca) 1871 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 1872 break; 1873 case 0: /* AC_BE */ 1874 default: 1875 ac = IEEE80211_AC_BE; 1876 if (acm) 1877 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1878 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1879 uapsd = true; 1880 params[ac].mu_edca = !!mu_edca; 1881 if (mu_edca) 1882 params[ac].mu_edca_param_rec = mu_edca->ac_be; 1883 break; 1884 } 1885 1886 params[ac].aifs = pos[0] & 0x0f; 1887 1888 if (params[ac].aifs < 2) { 1889 sdata_info(sdata, 1890 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1891 params[ac].aifs, aci); 1892 params[ac].aifs = 2; 1893 } 1894 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1895 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1896 params[ac].txop = get_unaligned_le16(pos + 2); 1897 params[ac].acm = acm; 1898 params[ac].uapsd = uapsd; 1899 1900 if (params[ac].cw_min == 0 || 1901 params[ac].cw_min > params[ac].cw_max) { 1902 sdata_info(sdata, 1903 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1904 params[ac].cw_min, params[ac].cw_max, aci); 1905 return false; 1906 } 1907 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 1908 } 1909 1910 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1911 mlme_dbg(sdata, 1912 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1913 ac, params[ac].acm, 1914 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1915 params[ac].txop, params[ac].uapsd, 1916 ifmgd->tx_tspec[ac].downgraded); 1917 sdata->tx_conf[ac] = params[ac]; 1918 if (!ifmgd->tx_tspec[ac].downgraded && 1919 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1920 sdata_err(sdata, 1921 "failed to set TX queue parameters for AC %d\n", 1922 ac); 1923 } 1924 1925 /* enable WMM or activate new settings */ 1926 sdata->vif.bss_conf.qos = true; 1927 return true; 1928 } 1929 1930 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1931 { 1932 lockdep_assert_held(&sdata->local->mtx); 1933 1934 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1935 ieee80211_run_deferred_scan(sdata->local); 1936 } 1937 1938 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1939 { 1940 mutex_lock(&sdata->local->mtx); 1941 __ieee80211_stop_poll(sdata); 1942 mutex_unlock(&sdata->local->mtx); 1943 } 1944 1945 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1946 u16 capab, bool erp_valid, u8 erp) 1947 { 1948 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1949 struct ieee80211_supported_band *sband; 1950 u32 changed = 0; 1951 bool use_protection; 1952 bool use_short_preamble; 1953 bool use_short_slot; 1954 1955 sband = ieee80211_get_sband(sdata); 1956 if (!sband) 1957 return changed; 1958 1959 if (erp_valid) { 1960 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1961 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1962 } else { 1963 use_protection = false; 1964 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1965 } 1966 1967 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1968 if (sband->band == NL80211_BAND_5GHZ) 1969 use_short_slot = true; 1970 1971 if (use_protection != bss_conf->use_cts_prot) { 1972 bss_conf->use_cts_prot = use_protection; 1973 changed |= BSS_CHANGED_ERP_CTS_PROT; 1974 } 1975 1976 if (use_short_preamble != bss_conf->use_short_preamble) { 1977 bss_conf->use_short_preamble = use_short_preamble; 1978 changed |= BSS_CHANGED_ERP_PREAMBLE; 1979 } 1980 1981 if (use_short_slot != bss_conf->use_short_slot) { 1982 bss_conf->use_short_slot = use_short_slot; 1983 changed |= BSS_CHANGED_ERP_SLOT; 1984 } 1985 1986 return changed; 1987 } 1988 1989 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1990 struct cfg80211_bss *cbss, 1991 u32 bss_info_changed) 1992 { 1993 struct ieee80211_bss *bss = (void *)cbss->priv; 1994 struct ieee80211_local *local = sdata->local; 1995 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1996 1997 bss_info_changed |= BSS_CHANGED_ASSOC; 1998 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1999 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2000 2001 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2002 beacon_loss_count * bss_conf->beacon_int)); 2003 2004 sdata->u.mgd.associated = cbss; 2005 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2006 2007 ieee80211_check_rate_mask(sdata); 2008 2009 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2010 2011 if (sdata->vif.p2p || 2012 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2013 const struct cfg80211_bss_ies *ies; 2014 2015 rcu_read_lock(); 2016 ies = rcu_dereference(cbss->ies); 2017 if (ies) { 2018 int ret; 2019 2020 ret = cfg80211_get_p2p_attr( 2021 ies->data, ies->len, 2022 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2023 (u8 *) &bss_conf->p2p_noa_attr, 2024 sizeof(bss_conf->p2p_noa_attr)); 2025 if (ret >= 2) { 2026 sdata->u.mgd.p2p_noa_index = 2027 bss_conf->p2p_noa_attr.index; 2028 bss_info_changed |= BSS_CHANGED_P2P_PS; 2029 } 2030 } 2031 rcu_read_unlock(); 2032 } 2033 2034 /* just to be sure */ 2035 ieee80211_stop_poll(sdata); 2036 2037 ieee80211_led_assoc(local, 1); 2038 2039 if (sdata->u.mgd.have_beacon) { 2040 /* 2041 * If the AP is buggy we may get here with no DTIM period 2042 * known, so assume it's 1 which is the only safe assumption 2043 * in that case, although if the TIM IE is broken powersave 2044 * probably just won't work at all. 2045 */ 2046 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2047 bss_conf->beacon_rate = bss->beacon_rate; 2048 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2049 } else { 2050 bss_conf->beacon_rate = NULL; 2051 bss_conf->dtim_period = 0; 2052 } 2053 2054 bss_conf->assoc = 1; 2055 2056 /* Tell the driver to monitor connection quality (if supported) */ 2057 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2058 bss_conf->cqm_rssi_thold) 2059 bss_info_changed |= BSS_CHANGED_CQM; 2060 2061 /* Enable ARP filtering */ 2062 if (bss_conf->arp_addr_cnt) 2063 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2064 2065 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2066 2067 mutex_lock(&local->iflist_mtx); 2068 ieee80211_recalc_ps(local); 2069 mutex_unlock(&local->iflist_mtx); 2070 2071 ieee80211_recalc_smps(sdata); 2072 ieee80211_recalc_ps_vif(sdata); 2073 2074 netif_carrier_on(sdata->dev); 2075 } 2076 2077 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2078 u16 stype, u16 reason, bool tx, 2079 u8 *frame_buf) 2080 { 2081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2082 struct ieee80211_local *local = sdata->local; 2083 u32 changed = 0; 2084 2085 sdata_assert_lock(sdata); 2086 2087 if (WARN_ON_ONCE(tx && !frame_buf)) 2088 return; 2089 2090 if (WARN_ON(!ifmgd->associated)) 2091 return; 2092 2093 ieee80211_stop_poll(sdata); 2094 2095 ifmgd->associated = NULL; 2096 netif_carrier_off(sdata->dev); 2097 2098 /* 2099 * if we want to get out of ps before disassoc (why?) we have 2100 * to do it before sending disassoc, as otherwise the null-packet 2101 * won't be valid. 2102 */ 2103 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2104 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2105 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2106 } 2107 local->ps_sdata = NULL; 2108 2109 /* disable per-vif ps */ 2110 ieee80211_recalc_ps_vif(sdata); 2111 2112 /* make sure ongoing transmission finishes */ 2113 synchronize_net(); 2114 2115 /* 2116 * drop any frame before deauth/disassoc, this can be data or 2117 * management frame. Since we are disconnecting, we should not 2118 * insist sending these frames which can take time and delay 2119 * the disconnection and possible the roaming. 2120 */ 2121 if (tx) 2122 ieee80211_flush_queues(local, sdata, true); 2123 2124 /* deauthenticate/disassociate now */ 2125 if (tx || frame_buf) { 2126 /* 2127 * In multi channel scenarios guarantee that the virtual 2128 * interface is granted immediate airtime to transmit the 2129 * deauthentication frame by calling mgd_prepare_tx, if the 2130 * driver requested so. 2131 */ 2132 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2133 !ifmgd->have_beacon) 2134 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2135 2136 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2137 reason, tx, frame_buf); 2138 } 2139 2140 /* flush out frame - make sure the deauth was actually sent */ 2141 if (tx) 2142 ieee80211_flush_queues(local, sdata, false); 2143 2144 /* clear bssid only after building the needed mgmt frames */ 2145 eth_zero_addr(ifmgd->bssid); 2146 2147 /* remove AP and TDLS peers */ 2148 sta_info_flush(sdata); 2149 2150 /* finally reset all BSS / config parameters */ 2151 changed |= ieee80211_reset_erp_info(sdata); 2152 2153 ieee80211_led_assoc(local, 0); 2154 changed |= BSS_CHANGED_ASSOC; 2155 sdata->vif.bss_conf.assoc = false; 2156 2157 ifmgd->p2p_noa_index = -1; 2158 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2159 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2160 2161 /* on the next assoc, re-program HT/VHT parameters */ 2162 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2163 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2164 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2165 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2166 2167 /* reset MU-MIMO ownership and group data */ 2168 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2169 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2170 memset(sdata->vif.bss_conf.mu_group.position, 0, 2171 sizeof(sdata->vif.bss_conf.mu_group.position)); 2172 changed |= BSS_CHANGED_MU_GROUPS; 2173 sdata->vif.mu_mimo_owner = false; 2174 2175 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2176 2177 del_timer_sync(&local->dynamic_ps_timer); 2178 cancel_work_sync(&local->dynamic_ps_enable_work); 2179 2180 /* Disable ARP filtering */ 2181 if (sdata->vif.bss_conf.arp_addr_cnt) 2182 changed |= BSS_CHANGED_ARP_FILTER; 2183 2184 sdata->vif.bss_conf.qos = false; 2185 changed |= BSS_CHANGED_QOS; 2186 2187 /* The BSSID (not really interesting) and HT changed */ 2188 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2189 ieee80211_bss_info_change_notify(sdata, changed); 2190 2191 /* disassociated - set to defaults now */ 2192 ieee80211_set_wmm_default(sdata, false, false); 2193 2194 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2195 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2196 del_timer_sync(&sdata->u.mgd.timer); 2197 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2198 2199 sdata->vif.bss_conf.dtim_period = 0; 2200 sdata->vif.bss_conf.beacon_rate = NULL; 2201 2202 ifmgd->have_beacon = false; 2203 2204 ifmgd->flags = 0; 2205 mutex_lock(&local->mtx); 2206 ieee80211_vif_release_channel(sdata); 2207 2208 sdata->vif.csa_active = false; 2209 ifmgd->csa_waiting_bcn = false; 2210 ifmgd->csa_ignored_same_chan = false; 2211 if (sdata->csa_block_tx) { 2212 ieee80211_wake_vif_queues(local, sdata, 2213 IEEE80211_QUEUE_STOP_REASON_CSA); 2214 sdata->csa_block_tx = false; 2215 } 2216 mutex_unlock(&local->mtx); 2217 2218 /* existing TX TSPEC sessions no longer exist */ 2219 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2220 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2221 2222 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2223 } 2224 2225 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2226 struct ieee80211_hdr *hdr) 2227 { 2228 /* 2229 * We can postpone the mgd.timer whenever receiving unicast frames 2230 * from AP because we know that the connection is working both ways 2231 * at that time. But multicast frames (and hence also beacons) must 2232 * be ignored here, because we need to trigger the timer during 2233 * data idle periods for sending the periodic probe request to the 2234 * AP we're connected to. 2235 */ 2236 if (is_multicast_ether_addr(hdr->addr1)) 2237 return; 2238 2239 ieee80211_sta_reset_conn_monitor(sdata); 2240 } 2241 2242 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2243 { 2244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2245 struct ieee80211_local *local = sdata->local; 2246 2247 mutex_lock(&local->mtx); 2248 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2249 goto out; 2250 2251 __ieee80211_stop_poll(sdata); 2252 2253 mutex_lock(&local->iflist_mtx); 2254 ieee80211_recalc_ps(local); 2255 mutex_unlock(&local->iflist_mtx); 2256 2257 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2258 goto out; 2259 2260 /* 2261 * We've received a probe response, but are not sure whether 2262 * we have or will be receiving any beacons or data, so let's 2263 * schedule the timers again, just in case. 2264 */ 2265 ieee80211_sta_reset_beacon_monitor(sdata); 2266 2267 mod_timer(&ifmgd->conn_mon_timer, 2268 round_jiffies_up(jiffies + 2269 IEEE80211_CONNECTION_IDLE_TIME)); 2270 out: 2271 mutex_unlock(&local->mtx); 2272 } 2273 2274 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2275 struct ieee80211_hdr *hdr, 2276 u16 tx_time) 2277 { 2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2279 u16 tid = ieee80211_get_tid(hdr); 2280 int ac = ieee80211_ac_from_tid(tid); 2281 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2282 unsigned long now = jiffies; 2283 2284 if (likely(!tx_tspec->admitted_time)) 2285 return; 2286 2287 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2288 tx_tspec->consumed_tx_time = 0; 2289 tx_tspec->time_slice_start = now; 2290 2291 if (tx_tspec->downgraded) { 2292 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2293 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2294 } 2295 } 2296 2297 if (tx_tspec->downgraded) 2298 return; 2299 2300 tx_tspec->consumed_tx_time += tx_time; 2301 2302 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2303 tx_tspec->downgraded = true; 2304 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2305 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2306 } 2307 } 2308 2309 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2310 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2311 { 2312 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2313 2314 if (!ieee80211_is_data(hdr->frame_control)) 2315 return; 2316 2317 if (ieee80211_is_nullfunc(hdr->frame_control) && 2318 sdata->u.mgd.probe_send_count > 0) { 2319 if (ack) 2320 ieee80211_sta_reset_conn_monitor(sdata); 2321 else 2322 sdata->u.mgd.nullfunc_failed = true; 2323 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2324 return; 2325 } 2326 2327 if (ack) 2328 ieee80211_sta_reset_conn_monitor(sdata); 2329 } 2330 2331 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2332 const u8 *src, const u8 *dst, 2333 const u8 *ssid, size_t ssid_len, 2334 struct ieee80211_channel *channel) 2335 { 2336 struct sk_buff *skb; 2337 2338 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2339 ssid, ssid_len, NULL, 0, 2340 IEEE80211_PROBE_FLAG_DIRECTED); 2341 if (skb) 2342 ieee80211_tx_skb(sdata, skb); 2343 } 2344 2345 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2346 { 2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2348 const u8 *ssid; 2349 u8 *dst = ifmgd->associated->bssid; 2350 u8 unicast_limit = max(1, max_probe_tries - 3); 2351 struct sta_info *sta; 2352 2353 /* 2354 * Try sending broadcast probe requests for the last three 2355 * probe requests after the first ones failed since some 2356 * buggy APs only support broadcast probe requests. 2357 */ 2358 if (ifmgd->probe_send_count >= unicast_limit) 2359 dst = NULL; 2360 2361 /* 2362 * When the hardware reports an accurate Tx ACK status, it's 2363 * better to send a nullfunc frame instead of a probe request, 2364 * as it will kick us off the AP quickly if we aren't associated 2365 * anymore. The timeout will be reset if the frame is ACKed by 2366 * the AP. 2367 */ 2368 ifmgd->probe_send_count++; 2369 2370 if (dst) { 2371 mutex_lock(&sdata->local->sta_mtx); 2372 sta = sta_info_get(sdata, dst); 2373 if (!WARN_ON(!sta)) 2374 ieee80211_check_fast_rx(sta); 2375 mutex_unlock(&sdata->local->sta_mtx); 2376 } 2377 2378 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2379 ifmgd->nullfunc_failed = false; 2380 ieee80211_send_nullfunc(sdata->local, sdata, false); 2381 } else { 2382 int ssid_len; 2383 2384 rcu_read_lock(); 2385 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2386 if (WARN_ON_ONCE(ssid == NULL)) 2387 ssid_len = 0; 2388 else 2389 ssid_len = ssid[1]; 2390 2391 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2392 ssid + 2, ssid_len, 2393 ifmgd->associated->channel); 2394 rcu_read_unlock(); 2395 } 2396 2397 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2398 run_again(sdata, ifmgd->probe_timeout); 2399 } 2400 2401 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2402 bool beacon) 2403 { 2404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2405 bool already = false; 2406 2407 if (!ieee80211_sdata_running(sdata)) 2408 return; 2409 2410 sdata_lock(sdata); 2411 2412 if (!ifmgd->associated) 2413 goto out; 2414 2415 mutex_lock(&sdata->local->mtx); 2416 2417 if (sdata->local->tmp_channel || sdata->local->scanning) { 2418 mutex_unlock(&sdata->local->mtx); 2419 goto out; 2420 } 2421 2422 if (beacon) { 2423 mlme_dbg_ratelimited(sdata, 2424 "detected beacon loss from AP (missed %d beacons) - probing\n", 2425 beacon_loss_count); 2426 2427 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2428 } 2429 2430 /* 2431 * The driver/our work has already reported this event or the 2432 * connection monitoring has kicked in and we have already sent 2433 * a probe request. Or maybe the AP died and the driver keeps 2434 * reporting until we disassociate... 2435 * 2436 * In either case we have to ignore the current call to this 2437 * function (except for setting the correct probe reason bit) 2438 * because otherwise we would reset the timer every time and 2439 * never check whether we received a probe response! 2440 */ 2441 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2442 already = true; 2443 2444 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2445 2446 mutex_unlock(&sdata->local->mtx); 2447 2448 if (already) 2449 goto out; 2450 2451 mutex_lock(&sdata->local->iflist_mtx); 2452 ieee80211_recalc_ps(sdata->local); 2453 mutex_unlock(&sdata->local->iflist_mtx); 2454 2455 ifmgd->probe_send_count = 0; 2456 ieee80211_mgd_probe_ap_send(sdata); 2457 out: 2458 sdata_unlock(sdata); 2459 } 2460 2461 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2462 struct ieee80211_vif *vif) 2463 { 2464 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2466 struct cfg80211_bss *cbss; 2467 struct sk_buff *skb; 2468 const u8 *ssid; 2469 int ssid_len; 2470 2471 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2472 return NULL; 2473 2474 sdata_assert_lock(sdata); 2475 2476 if (ifmgd->associated) 2477 cbss = ifmgd->associated; 2478 else if (ifmgd->auth_data) 2479 cbss = ifmgd->auth_data->bss; 2480 else if (ifmgd->assoc_data) 2481 cbss = ifmgd->assoc_data->bss; 2482 else 2483 return NULL; 2484 2485 rcu_read_lock(); 2486 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2487 if (WARN_ON_ONCE(ssid == NULL)) 2488 ssid_len = 0; 2489 else 2490 ssid_len = ssid[1]; 2491 2492 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2493 (u32) -1, cbss->channel, 2494 ssid + 2, ssid_len, 2495 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2496 rcu_read_unlock(); 2497 2498 return skb; 2499 } 2500 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2501 2502 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2503 const u8 *buf, size_t len, bool tx, 2504 u16 reason) 2505 { 2506 struct ieee80211_event event = { 2507 .type = MLME_EVENT, 2508 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2509 .u.mlme.reason = reason, 2510 }; 2511 2512 if (tx) 2513 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2514 else 2515 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2516 2517 drv_event_callback(sdata->local, sdata, &event); 2518 } 2519 2520 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2521 { 2522 struct ieee80211_local *local = sdata->local; 2523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2524 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2525 2526 sdata_lock(sdata); 2527 if (!ifmgd->associated) { 2528 sdata_unlock(sdata); 2529 return; 2530 } 2531 2532 /* AP is probably out of range (or not reachable for another reason) so 2533 * remove the bss struct for that AP. 2534 */ 2535 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2536 2537 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2538 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2539 true, frame_buf); 2540 mutex_lock(&local->mtx); 2541 sdata->vif.csa_active = false; 2542 ifmgd->csa_waiting_bcn = false; 2543 if (sdata->csa_block_tx) { 2544 ieee80211_wake_vif_queues(local, sdata, 2545 IEEE80211_QUEUE_STOP_REASON_CSA); 2546 sdata->csa_block_tx = false; 2547 } 2548 mutex_unlock(&local->mtx); 2549 2550 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2551 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2552 2553 sdata_unlock(sdata); 2554 } 2555 2556 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2557 { 2558 struct ieee80211_sub_if_data *sdata = 2559 container_of(work, struct ieee80211_sub_if_data, 2560 u.mgd.beacon_connection_loss_work); 2561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2562 2563 if (ifmgd->associated) 2564 ifmgd->beacon_loss_count++; 2565 2566 if (ifmgd->connection_loss) { 2567 sdata_info(sdata, "Connection to AP %pM lost\n", 2568 ifmgd->bssid); 2569 __ieee80211_disconnect(sdata); 2570 } else { 2571 ieee80211_mgd_probe_ap(sdata, true); 2572 } 2573 } 2574 2575 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2576 { 2577 struct ieee80211_sub_if_data *sdata = 2578 container_of(work, struct ieee80211_sub_if_data, 2579 u.mgd.csa_connection_drop_work); 2580 2581 __ieee80211_disconnect(sdata); 2582 } 2583 2584 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2585 { 2586 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2587 struct ieee80211_hw *hw = &sdata->local->hw; 2588 2589 trace_api_beacon_loss(sdata); 2590 2591 sdata->u.mgd.connection_loss = false; 2592 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2593 } 2594 EXPORT_SYMBOL(ieee80211_beacon_loss); 2595 2596 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2597 { 2598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2599 struct ieee80211_hw *hw = &sdata->local->hw; 2600 2601 trace_api_connection_loss(sdata); 2602 2603 sdata->u.mgd.connection_loss = true; 2604 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2605 } 2606 EXPORT_SYMBOL(ieee80211_connection_loss); 2607 2608 2609 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2610 bool assoc) 2611 { 2612 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2613 2614 sdata_assert_lock(sdata); 2615 2616 if (!assoc) { 2617 /* 2618 * we are not authenticated yet, the only timer that could be 2619 * running is the timeout for the authentication response which 2620 * which is not relevant anymore. 2621 */ 2622 del_timer_sync(&sdata->u.mgd.timer); 2623 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2624 2625 eth_zero_addr(sdata->u.mgd.bssid); 2626 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2627 sdata->u.mgd.flags = 0; 2628 mutex_lock(&sdata->local->mtx); 2629 ieee80211_vif_release_channel(sdata); 2630 mutex_unlock(&sdata->local->mtx); 2631 } 2632 2633 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2634 kfree(auth_data); 2635 sdata->u.mgd.auth_data = NULL; 2636 } 2637 2638 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2639 bool assoc, bool abandon) 2640 { 2641 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2642 2643 sdata_assert_lock(sdata); 2644 2645 if (!assoc) { 2646 /* 2647 * we are not associated yet, the only timer that could be 2648 * running is the timeout for the association response which 2649 * which is not relevant anymore. 2650 */ 2651 del_timer_sync(&sdata->u.mgd.timer); 2652 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2653 2654 eth_zero_addr(sdata->u.mgd.bssid); 2655 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2656 sdata->u.mgd.flags = 0; 2657 sdata->vif.mu_mimo_owner = false; 2658 2659 mutex_lock(&sdata->local->mtx); 2660 ieee80211_vif_release_channel(sdata); 2661 mutex_unlock(&sdata->local->mtx); 2662 2663 if (abandon) 2664 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2665 } 2666 2667 kfree(assoc_data); 2668 sdata->u.mgd.assoc_data = NULL; 2669 } 2670 2671 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2672 struct ieee80211_mgmt *mgmt, size_t len) 2673 { 2674 struct ieee80211_local *local = sdata->local; 2675 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2676 u8 *pos; 2677 struct ieee802_11_elems elems; 2678 u32 tx_flags = 0; 2679 2680 pos = mgmt->u.auth.variable; 2681 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2682 if (!elems.challenge) 2683 return; 2684 auth_data->expected_transaction = 4; 2685 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2686 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2687 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2688 IEEE80211_TX_INTFL_MLME_CONN_TX; 2689 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2690 elems.challenge - 2, elems.challenge_len + 2, 2691 auth_data->bss->bssid, auth_data->bss->bssid, 2692 auth_data->key, auth_data->key_len, 2693 auth_data->key_idx, tx_flags); 2694 } 2695 2696 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2697 struct ieee80211_mgmt *mgmt, size_t len) 2698 { 2699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2700 u8 bssid[ETH_ALEN]; 2701 u16 auth_alg, auth_transaction, status_code; 2702 struct sta_info *sta; 2703 struct ieee80211_event event = { 2704 .type = MLME_EVENT, 2705 .u.mlme.data = AUTH_EVENT, 2706 }; 2707 2708 sdata_assert_lock(sdata); 2709 2710 if (len < 24 + 6) 2711 return; 2712 2713 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2714 return; 2715 2716 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2717 2718 if (!ether_addr_equal(bssid, mgmt->bssid)) 2719 return; 2720 2721 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2722 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2723 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2724 2725 if (auth_alg != ifmgd->auth_data->algorithm || 2726 auth_transaction != ifmgd->auth_data->expected_transaction) { 2727 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2728 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2729 auth_transaction, 2730 ifmgd->auth_data->expected_transaction); 2731 return; 2732 } 2733 2734 if (status_code != WLAN_STATUS_SUCCESS) { 2735 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2736 mgmt->sa, status_code); 2737 ieee80211_destroy_auth_data(sdata, false); 2738 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2739 event.u.mlme.status = MLME_DENIED; 2740 event.u.mlme.reason = status_code; 2741 drv_event_callback(sdata->local, sdata, &event); 2742 return; 2743 } 2744 2745 switch (ifmgd->auth_data->algorithm) { 2746 case WLAN_AUTH_OPEN: 2747 case WLAN_AUTH_LEAP: 2748 case WLAN_AUTH_FT: 2749 case WLAN_AUTH_SAE: 2750 case WLAN_AUTH_FILS_SK: 2751 case WLAN_AUTH_FILS_SK_PFS: 2752 case WLAN_AUTH_FILS_PK: 2753 break; 2754 case WLAN_AUTH_SHARED_KEY: 2755 if (ifmgd->auth_data->expected_transaction != 4) { 2756 ieee80211_auth_challenge(sdata, mgmt, len); 2757 /* need another frame */ 2758 return; 2759 } 2760 break; 2761 default: 2762 WARN_ONCE(1, "invalid auth alg %d", 2763 ifmgd->auth_data->algorithm); 2764 return; 2765 } 2766 2767 event.u.mlme.status = MLME_SUCCESS; 2768 drv_event_callback(sdata->local, sdata, &event); 2769 sdata_info(sdata, "authenticated\n"); 2770 ifmgd->auth_data->done = true; 2771 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2772 ifmgd->auth_data->timeout_started = true; 2773 run_again(sdata, ifmgd->auth_data->timeout); 2774 2775 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2776 ifmgd->auth_data->expected_transaction != 2) { 2777 /* 2778 * Report auth frame to user space for processing since another 2779 * round of Authentication frames is still needed. 2780 */ 2781 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2782 return; 2783 } 2784 2785 /* move station state to auth */ 2786 mutex_lock(&sdata->local->sta_mtx); 2787 sta = sta_info_get(sdata, bssid); 2788 if (!sta) { 2789 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2790 goto out_err; 2791 } 2792 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2793 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2794 goto out_err; 2795 } 2796 mutex_unlock(&sdata->local->sta_mtx); 2797 2798 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2799 return; 2800 out_err: 2801 mutex_unlock(&sdata->local->sta_mtx); 2802 /* ignore frame -- wait for timeout */ 2803 } 2804 2805 #define case_WLAN(type) \ 2806 case WLAN_REASON_##type: return #type 2807 2808 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2809 { 2810 switch (reason_code) { 2811 case_WLAN(UNSPECIFIED); 2812 case_WLAN(PREV_AUTH_NOT_VALID); 2813 case_WLAN(DEAUTH_LEAVING); 2814 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2815 case_WLAN(DISASSOC_AP_BUSY); 2816 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2817 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2818 case_WLAN(DISASSOC_STA_HAS_LEFT); 2819 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2820 case_WLAN(DISASSOC_BAD_POWER); 2821 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2822 case_WLAN(INVALID_IE); 2823 case_WLAN(MIC_FAILURE); 2824 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2825 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2826 case_WLAN(IE_DIFFERENT); 2827 case_WLAN(INVALID_GROUP_CIPHER); 2828 case_WLAN(INVALID_PAIRWISE_CIPHER); 2829 case_WLAN(INVALID_AKMP); 2830 case_WLAN(UNSUPP_RSN_VERSION); 2831 case_WLAN(INVALID_RSN_IE_CAP); 2832 case_WLAN(IEEE8021X_FAILED); 2833 case_WLAN(CIPHER_SUITE_REJECTED); 2834 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2835 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2836 case_WLAN(DISASSOC_LOW_ACK); 2837 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2838 case_WLAN(QSTA_LEAVE_QBSS); 2839 case_WLAN(QSTA_NOT_USE); 2840 case_WLAN(QSTA_REQUIRE_SETUP); 2841 case_WLAN(QSTA_TIMEOUT); 2842 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2843 case_WLAN(MESH_PEER_CANCELED); 2844 case_WLAN(MESH_MAX_PEERS); 2845 case_WLAN(MESH_CONFIG); 2846 case_WLAN(MESH_CLOSE); 2847 case_WLAN(MESH_MAX_RETRIES); 2848 case_WLAN(MESH_CONFIRM_TIMEOUT); 2849 case_WLAN(MESH_INVALID_GTK); 2850 case_WLAN(MESH_INCONSISTENT_PARAM); 2851 case_WLAN(MESH_INVALID_SECURITY); 2852 case_WLAN(MESH_PATH_ERROR); 2853 case_WLAN(MESH_PATH_NOFORWARD); 2854 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2855 case_WLAN(MAC_EXISTS_IN_MBSS); 2856 case_WLAN(MESH_CHAN_REGULATORY); 2857 case_WLAN(MESH_CHAN); 2858 default: return "<unknown>"; 2859 } 2860 } 2861 2862 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2863 struct ieee80211_mgmt *mgmt, size_t len) 2864 { 2865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2866 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2867 2868 sdata_assert_lock(sdata); 2869 2870 if (len < 24 + 2) 2871 return; 2872 2873 if (ifmgd->associated && 2874 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2875 const u8 *bssid = ifmgd->associated->bssid; 2876 2877 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2878 bssid, reason_code, 2879 ieee80211_get_reason_code_string(reason_code)); 2880 2881 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2882 2883 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2884 reason_code); 2885 return; 2886 } 2887 2888 if (ifmgd->assoc_data && 2889 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2890 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2891 2892 sdata_info(sdata, 2893 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2894 bssid, reason_code, 2895 ieee80211_get_reason_code_string(reason_code)); 2896 2897 ieee80211_destroy_assoc_data(sdata, false, true); 2898 2899 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2900 return; 2901 } 2902 } 2903 2904 2905 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2906 struct ieee80211_mgmt *mgmt, size_t len) 2907 { 2908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2909 u16 reason_code; 2910 2911 sdata_assert_lock(sdata); 2912 2913 if (len < 24 + 2) 2914 return; 2915 2916 if (!ifmgd->associated || 2917 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2918 return; 2919 2920 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2921 2922 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2923 mgmt->sa, reason_code, 2924 ieee80211_get_reason_code_string(reason_code)); 2925 2926 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2927 2928 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2929 } 2930 2931 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2932 u8 *supp_rates, unsigned int supp_rates_len, 2933 u32 *rates, u32 *basic_rates, 2934 bool *have_higher_than_11mbit, 2935 int *min_rate, int *min_rate_index, 2936 int shift) 2937 { 2938 int i, j; 2939 2940 for (i = 0; i < supp_rates_len; i++) { 2941 int rate = supp_rates[i] & 0x7f; 2942 bool is_basic = !!(supp_rates[i] & 0x80); 2943 2944 if ((rate * 5 * (1 << shift)) > 110) 2945 *have_higher_than_11mbit = true; 2946 2947 /* 2948 * Skip HT and VHT BSS membership selectors since they're not 2949 * rates. 2950 * 2951 * Note: Even though the membership selector and the basic 2952 * rate flag share the same bit, they are not exactly 2953 * the same. 2954 */ 2955 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2956 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2957 continue; 2958 2959 for (j = 0; j < sband->n_bitrates; j++) { 2960 struct ieee80211_rate *br; 2961 int brate; 2962 2963 br = &sband->bitrates[j]; 2964 2965 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2966 if (brate == rate) { 2967 *rates |= BIT(j); 2968 if (is_basic) 2969 *basic_rates |= BIT(j); 2970 if ((rate * 5) < *min_rate) { 2971 *min_rate = rate * 5; 2972 *min_rate_index = j; 2973 } 2974 break; 2975 } 2976 } 2977 } 2978 } 2979 2980 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2981 struct cfg80211_bss *cbss, 2982 struct ieee80211_mgmt *mgmt, size_t len) 2983 { 2984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2985 struct ieee80211_local *local = sdata->local; 2986 struct ieee80211_supported_band *sband; 2987 struct sta_info *sta; 2988 u8 *pos; 2989 u16 capab_info, aid; 2990 struct ieee802_11_elems elems; 2991 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2992 const struct cfg80211_bss_ies *bss_ies = NULL; 2993 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2994 u32 changed = 0; 2995 int err; 2996 bool ret; 2997 2998 /* AssocResp and ReassocResp have identical structure */ 2999 3000 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3001 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3002 3003 /* 3004 * The 5 MSB of the AID field are reserved 3005 * (802.11-2016 9.4.1.8 AID field) 3006 */ 3007 aid &= 0x7ff; 3008 3009 ifmgd->broken_ap = false; 3010 3011 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3012 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3013 aid); 3014 aid = 0; 3015 ifmgd->broken_ap = true; 3016 } 3017 3018 pos = mgmt->u.assoc_resp.variable; 3019 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3020 3021 if (!elems.supp_rates) { 3022 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3023 return false; 3024 } 3025 3026 ifmgd->aid = aid; 3027 ifmgd->tdls_chan_switch_prohibited = 3028 elems.ext_capab && elems.ext_capab_len >= 5 && 3029 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3030 3031 /* 3032 * Some APs are erroneously not including some information in their 3033 * (re)association response frames. Try to recover by using the data 3034 * from the beacon or probe response. This seems to afflict mobile 3035 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3036 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3037 */ 3038 if ((assoc_data->wmm && !elems.wmm_param) || 3039 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3040 (!elems.ht_cap_elem || !elems.ht_operation)) || 3041 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3042 (!elems.vht_cap_elem || !elems.vht_operation))) { 3043 const struct cfg80211_bss_ies *ies; 3044 struct ieee802_11_elems bss_elems; 3045 3046 rcu_read_lock(); 3047 ies = rcu_dereference(cbss->ies); 3048 if (ies) 3049 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3050 GFP_ATOMIC); 3051 rcu_read_unlock(); 3052 if (!bss_ies) 3053 return false; 3054 3055 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3056 false, &bss_elems); 3057 if (assoc_data->wmm && 3058 !elems.wmm_param && bss_elems.wmm_param) { 3059 elems.wmm_param = bss_elems.wmm_param; 3060 sdata_info(sdata, 3061 "AP bug: WMM param missing from AssocResp\n"); 3062 } 3063 3064 /* 3065 * Also check if we requested HT/VHT, otherwise the AP doesn't 3066 * have to include the IEs in the (re)association response. 3067 */ 3068 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3069 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3070 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3071 sdata_info(sdata, 3072 "AP bug: HT capability missing from AssocResp\n"); 3073 } 3074 if (!elems.ht_operation && bss_elems.ht_operation && 3075 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3076 elems.ht_operation = bss_elems.ht_operation; 3077 sdata_info(sdata, 3078 "AP bug: HT operation missing from AssocResp\n"); 3079 } 3080 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3081 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3082 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3083 sdata_info(sdata, 3084 "AP bug: VHT capa missing from AssocResp\n"); 3085 } 3086 if (!elems.vht_operation && bss_elems.vht_operation && 3087 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3088 elems.vht_operation = bss_elems.vht_operation; 3089 sdata_info(sdata, 3090 "AP bug: VHT operation missing from AssocResp\n"); 3091 } 3092 } 3093 3094 /* 3095 * We previously checked these in the beacon/probe response, so 3096 * they should be present here. This is just a safety net. 3097 */ 3098 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3099 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3100 sdata_info(sdata, 3101 "HT AP is missing WMM params or HT capability/operation\n"); 3102 ret = false; 3103 goto out; 3104 } 3105 3106 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3107 (!elems.vht_cap_elem || !elems.vht_operation)) { 3108 sdata_info(sdata, 3109 "VHT AP is missing VHT capability/operation\n"); 3110 ret = false; 3111 goto out; 3112 } 3113 3114 mutex_lock(&sdata->local->sta_mtx); 3115 /* 3116 * station info was already allocated and inserted before 3117 * the association and should be available to us 3118 */ 3119 sta = sta_info_get(sdata, cbss->bssid); 3120 if (WARN_ON(!sta)) { 3121 mutex_unlock(&sdata->local->sta_mtx); 3122 ret = false; 3123 goto out; 3124 } 3125 3126 sband = ieee80211_get_sband(sdata); 3127 if (!sband) { 3128 mutex_unlock(&sdata->local->sta_mtx); 3129 ret = false; 3130 goto out; 3131 } 3132 3133 /* 3134 * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark 3135 * HE as disabled. If on the 5GHz band, make sure it supports VHT. 3136 */ 3137 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 3138 (sband->band == NL80211_BAND_5GHZ && 3139 ifmgd->flags & IEEE80211_STA_DISABLE_VHT) || 3140 (!elems.he_cap && !elems.he_operation)) 3141 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 3142 3143 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3144 (!elems.he_cap || !elems.he_operation)) { 3145 mutex_unlock(&sdata->local->sta_mtx); 3146 sdata_info(sdata, 3147 "HE AP is missing HE capability/operation\n"); 3148 ret = false; 3149 goto out; 3150 } 3151 3152 /* Set up internal HT/VHT capabilities */ 3153 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3154 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3155 elems.ht_cap_elem, sta); 3156 3157 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3158 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3159 elems.vht_cap_elem, sta); 3160 3161 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3162 elems.he_cap) { 3163 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3164 elems.he_cap, 3165 elems.he_cap_len, 3166 sta); 3167 3168 bss_conf->he_support = sta->sta.he_cap.has_he; 3169 } else { 3170 bss_conf->he_support = false; 3171 } 3172 3173 if (bss_conf->he_support) { 3174 u32 he_oper_params = 3175 le32_to_cpu(elems.he_operation->he_oper_params); 3176 3177 bss_conf->bss_color = he_oper_params & 3178 IEEE80211_HE_OPERATION_BSS_COLOR_MASK; 3179 bss_conf->htc_trig_based_pkt_ext = 3180 (he_oper_params & 3181 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK) << 3182 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_OFFSET; 3183 bss_conf->frame_time_rts_th = 3184 (he_oper_params & 3185 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK) << 3186 IEEE80211_HE_OPERATION_RTS_THRESHOLD_OFFSET; 3187 3188 bss_conf->multi_sta_back_32bit = 3189 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3190 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3191 3192 bss_conf->ack_enabled = 3193 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3194 IEEE80211_HE_MAC_CAP2_ACK_EN; 3195 3196 bss_conf->uora_exists = !!elems.uora_element; 3197 if (elems.uora_element) 3198 bss_conf->uora_ocw_range = elems.uora_element[0]; 3199 3200 /* TODO: OPEN: what happens if BSS color disable is set? */ 3201 } 3202 3203 /* 3204 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3205 * in their association response, so ignore that data for our own 3206 * configuration. If it changed since the last beacon, we'll get the 3207 * next beacon and update then. 3208 */ 3209 3210 /* 3211 * If an operating mode notification IE is present, override the 3212 * NSS calculation (that would be done in rate_control_rate_init()) 3213 * and use the # of streams from that element. 3214 */ 3215 if (elems.opmode_notif && 3216 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3217 u8 nss; 3218 3219 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3220 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3221 nss += 1; 3222 sta->sta.rx_nss = nss; 3223 } 3224 3225 rate_control_rate_init(sta); 3226 3227 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3228 set_sta_flag(sta, WLAN_STA_MFP); 3229 sta->sta.mfp = true; 3230 } else { 3231 sta->sta.mfp = false; 3232 } 3233 3234 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3235 3236 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3237 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3238 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3239 if (err) { 3240 sdata_info(sdata, 3241 "failed to move station %pM to desired state\n", 3242 sta->sta.addr); 3243 WARN_ON(__sta_info_destroy(sta)); 3244 mutex_unlock(&sdata->local->sta_mtx); 3245 ret = false; 3246 goto out; 3247 } 3248 3249 mutex_unlock(&sdata->local->sta_mtx); 3250 3251 /* 3252 * Always handle WMM once after association regardless 3253 * of the first value the AP uses. Setting -1 here has 3254 * that effect because the AP values is an unsigned 3255 * 4-bit value. 3256 */ 3257 ifmgd->wmm_last_param_set = -1; 3258 3259 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3260 ieee80211_set_wmm_default(sdata, false, false); 3261 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3262 elems.wmm_param_len, 3263 elems.mu_edca_param_set)) { 3264 /* still enable QoS since we might have HT/VHT */ 3265 ieee80211_set_wmm_default(sdata, false, true); 3266 /* set the disable-WMM flag in this case to disable 3267 * tracking WMM parameter changes in the beacon if 3268 * the parameters weren't actually valid. Doing so 3269 * avoids changing parameters very strangely when 3270 * the AP is going back and forth between valid and 3271 * invalid parameters. 3272 */ 3273 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3274 } 3275 changed |= BSS_CHANGED_QOS; 3276 3277 if (elems.max_idle_period_ie) { 3278 bss_conf->max_idle_period = 3279 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3280 bss_conf->protected_keep_alive = 3281 !!(elems.max_idle_period_ie->idle_options & 3282 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3283 changed |= BSS_CHANGED_KEEP_ALIVE; 3284 } else { 3285 bss_conf->max_idle_period = 0; 3286 bss_conf->protected_keep_alive = false; 3287 } 3288 3289 /* set AID and assoc capability, 3290 * ieee80211_set_associated() will tell the driver */ 3291 bss_conf->aid = aid; 3292 bss_conf->assoc_capability = capab_info; 3293 ieee80211_set_associated(sdata, cbss, changed); 3294 3295 /* 3296 * If we're using 4-addr mode, let the AP know that we're 3297 * doing so, so that it can create the STA VLAN on its side 3298 */ 3299 if (ifmgd->use_4addr) 3300 ieee80211_send_4addr_nullfunc(local, sdata); 3301 3302 /* 3303 * Start timer to probe the connection to the AP now. 3304 * Also start the timer that will detect beacon loss. 3305 */ 3306 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3307 ieee80211_sta_reset_beacon_monitor(sdata); 3308 3309 ret = true; 3310 out: 3311 kfree(bss_ies); 3312 return ret; 3313 } 3314 3315 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3316 struct ieee80211_mgmt *mgmt, 3317 size_t len) 3318 { 3319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3320 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3321 u16 capab_info, status_code, aid; 3322 struct ieee802_11_elems elems; 3323 int ac, uapsd_queues = -1; 3324 u8 *pos; 3325 bool reassoc; 3326 struct cfg80211_bss *bss; 3327 struct ieee80211_event event = { 3328 .type = MLME_EVENT, 3329 .u.mlme.data = ASSOC_EVENT, 3330 }; 3331 3332 sdata_assert_lock(sdata); 3333 3334 if (!assoc_data) 3335 return; 3336 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3337 return; 3338 3339 /* 3340 * AssocResp and ReassocResp have identical structure, so process both 3341 * of them in this function. 3342 */ 3343 3344 if (len < 24 + 6) 3345 return; 3346 3347 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3348 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3349 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3350 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3351 3352 sdata_info(sdata, 3353 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3354 reassoc ? "Rea" : "A", mgmt->sa, 3355 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3356 3357 if (assoc_data->fils_kek_len && 3358 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3359 return; 3360 3361 pos = mgmt->u.assoc_resp.variable; 3362 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3363 3364 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3365 elems.timeout_int && 3366 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3367 u32 tu, ms; 3368 tu = le32_to_cpu(elems.timeout_int->value); 3369 ms = tu * 1024 / 1000; 3370 sdata_info(sdata, 3371 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3372 mgmt->sa, tu, ms); 3373 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3374 assoc_data->timeout_started = true; 3375 if (ms > IEEE80211_ASSOC_TIMEOUT) 3376 run_again(sdata, assoc_data->timeout); 3377 return; 3378 } 3379 3380 bss = assoc_data->bss; 3381 3382 if (status_code != WLAN_STATUS_SUCCESS) { 3383 sdata_info(sdata, "%pM denied association (code=%d)\n", 3384 mgmt->sa, status_code); 3385 ieee80211_destroy_assoc_data(sdata, false, false); 3386 event.u.mlme.status = MLME_DENIED; 3387 event.u.mlme.reason = status_code; 3388 drv_event_callback(sdata->local, sdata, &event); 3389 } else { 3390 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3391 /* oops -- internal error -- send timeout for now */ 3392 ieee80211_destroy_assoc_data(sdata, false, false); 3393 cfg80211_assoc_timeout(sdata->dev, bss); 3394 return; 3395 } 3396 event.u.mlme.status = MLME_SUCCESS; 3397 drv_event_callback(sdata->local, sdata, &event); 3398 sdata_info(sdata, "associated\n"); 3399 3400 /* 3401 * destroy assoc_data afterwards, as otherwise an idle 3402 * recalc after assoc_data is NULL but before associated 3403 * is set can cause the interface to go idle 3404 */ 3405 ieee80211_destroy_assoc_data(sdata, true, false); 3406 3407 /* get uapsd queues configuration */ 3408 uapsd_queues = 0; 3409 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3410 if (sdata->tx_conf[ac].uapsd) 3411 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3412 } 3413 3414 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3415 } 3416 3417 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3418 struct ieee80211_mgmt *mgmt, size_t len, 3419 struct ieee80211_rx_status *rx_status, 3420 struct ieee802_11_elems *elems) 3421 { 3422 struct ieee80211_local *local = sdata->local; 3423 struct ieee80211_bss *bss; 3424 struct ieee80211_channel *channel; 3425 3426 sdata_assert_lock(sdata); 3427 3428 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3429 if (!channel) 3430 return; 3431 3432 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3433 channel); 3434 if (bss) { 3435 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3436 ieee80211_rx_bss_put(local, bss); 3437 } 3438 } 3439 3440 3441 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3442 struct sk_buff *skb) 3443 { 3444 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3445 struct ieee80211_if_managed *ifmgd; 3446 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3447 size_t baselen, len = skb->len; 3448 struct ieee802_11_elems elems; 3449 3450 ifmgd = &sdata->u.mgd; 3451 3452 sdata_assert_lock(sdata); 3453 3454 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3455 return; /* ignore ProbeResp to foreign address */ 3456 3457 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3458 if (baselen > len) 3459 return; 3460 3461 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3462 false, &elems); 3463 3464 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3465 3466 if (ifmgd->associated && 3467 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3468 ieee80211_reset_ap_probe(sdata); 3469 } 3470 3471 /* 3472 * This is the canonical list of information elements we care about, 3473 * the filter code also gives us all changes to the Microsoft OUI 3474 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3475 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3476 * changes to requested client power. 3477 * 3478 * We implement beacon filtering in software since that means we can 3479 * avoid processing the frame here and in cfg80211, and userspace 3480 * will not be able to tell whether the hardware supports it or not. 3481 * 3482 * XXX: This list needs to be dynamic -- userspace needs to be able to 3483 * add items it requires. It also needs to be able to tell us to 3484 * look out for other vendor IEs. 3485 */ 3486 static const u64 care_about_ies = 3487 (1ULL << WLAN_EID_COUNTRY) | 3488 (1ULL << WLAN_EID_ERP_INFO) | 3489 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3490 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3491 (1ULL << WLAN_EID_HT_CAPABILITY) | 3492 (1ULL << WLAN_EID_HT_OPERATION) | 3493 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3494 3495 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3496 struct ieee80211_if_managed *ifmgd, 3497 struct ieee80211_bss_conf *bss_conf, 3498 struct ieee80211_local *local, 3499 struct ieee80211_rx_status *rx_status) 3500 { 3501 /* Track average RSSI from the Beacon frames of the current AP */ 3502 3503 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3504 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3505 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3506 ifmgd->last_cqm_event_signal = 0; 3507 ifmgd->count_beacon_signal = 1; 3508 ifmgd->last_ave_beacon_signal = 0; 3509 } else { 3510 ifmgd->count_beacon_signal++; 3511 } 3512 3513 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3514 3515 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3516 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3517 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3518 int last_sig = ifmgd->last_ave_beacon_signal; 3519 struct ieee80211_event event = { 3520 .type = RSSI_EVENT, 3521 }; 3522 3523 /* 3524 * if signal crosses either of the boundaries, invoke callback 3525 * with appropriate parameters 3526 */ 3527 if (sig > ifmgd->rssi_max_thold && 3528 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3529 ifmgd->last_ave_beacon_signal = sig; 3530 event.u.rssi.data = RSSI_EVENT_HIGH; 3531 drv_event_callback(local, sdata, &event); 3532 } else if (sig < ifmgd->rssi_min_thold && 3533 (last_sig >= ifmgd->rssi_max_thold || 3534 last_sig == 0)) { 3535 ifmgd->last_ave_beacon_signal = sig; 3536 event.u.rssi.data = RSSI_EVENT_LOW; 3537 drv_event_callback(local, sdata, &event); 3538 } 3539 } 3540 3541 if (bss_conf->cqm_rssi_thold && 3542 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3543 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3544 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3545 int last_event = ifmgd->last_cqm_event_signal; 3546 int thold = bss_conf->cqm_rssi_thold; 3547 int hyst = bss_conf->cqm_rssi_hyst; 3548 3549 if (sig < thold && 3550 (last_event == 0 || sig < last_event - hyst)) { 3551 ifmgd->last_cqm_event_signal = sig; 3552 ieee80211_cqm_rssi_notify( 3553 &sdata->vif, 3554 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3555 sig, GFP_KERNEL); 3556 } else if (sig > thold && 3557 (last_event == 0 || sig > last_event + hyst)) { 3558 ifmgd->last_cqm_event_signal = sig; 3559 ieee80211_cqm_rssi_notify( 3560 &sdata->vif, 3561 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3562 sig, GFP_KERNEL); 3563 } 3564 } 3565 3566 if (bss_conf->cqm_rssi_low && 3567 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3568 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3569 int last_event = ifmgd->last_cqm_event_signal; 3570 int low = bss_conf->cqm_rssi_low; 3571 int high = bss_conf->cqm_rssi_high; 3572 3573 if (sig < low && 3574 (last_event == 0 || last_event >= low)) { 3575 ifmgd->last_cqm_event_signal = sig; 3576 ieee80211_cqm_rssi_notify( 3577 &sdata->vif, 3578 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3579 sig, GFP_KERNEL); 3580 } else if (sig > high && 3581 (last_event == 0 || last_event <= high)) { 3582 ifmgd->last_cqm_event_signal = sig; 3583 ieee80211_cqm_rssi_notify( 3584 &sdata->vif, 3585 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3586 sig, GFP_KERNEL); 3587 } 3588 } 3589 } 3590 3591 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3592 struct ieee80211_mgmt *mgmt, size_t len, 3593 struct ieee80211_rx_status *rx_status) 3594 { 3595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3597 size_t baselen; 3598 struct ieee802_11_elems elems; 3599 struct ieee80211_local *local = sdata->local; 3600 struct ieee80211_chanctx_conf *chanctx_conf; 3601 struct ieee80211_channel *chan; 3602 struct sta_info *sta; 3603 u32 changed = 0; 3604 bool erp_valid; 3605 u8 erp_value = 0; 3606 u32 ncrc; 3607 u8 *bssid; 3608 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3609 3610 sdata_assert_lock(sdata); 3611 3612 /* Process beacon from the current BSS */ 3613 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3614 if (baselen > len) 3615 return; 3616 3617 rcu_read_lock(); 3618 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3619 if (!chanctx_conf) { 3620 rcu_read_unlock(); 3621 return; 3622 } 3623 3624 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3625 rcu_read_unlock(); 3626 return; 3627 } 3628 chan = chanctx_conf->def.chan; 3629 rcu_read_unlock(); 3630 3631 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3632 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3633 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3634 len - baselen, false, &elems); 3635 3636 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3637 if (elems.tim && !elems.parse_error) { 3638 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3639 ifmgd->dtim_period = tim_ie->dtim_period; 3640 } 3641 ifmgd->have_beacon = true; 3642 ifmgd->assoc_data->need_beacon = false; 3643 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3644 sdata->vif.bss_conf.sync_tsf = 3645 le64_to_cpu(mgmt->u.beacon.timestamp); 3646 sdata->vif.bss_conf.sync_device_ts = 3647 rx_status->device_timestamp; 3648 if (elems.tim) 3649 sdata->vif.bss_conf.sync_dtim_count = 3650 elems.tim->dtim_count; 3651 else 3652 sdata->vif.bss_conf.sync_dtim_count = 0; 3653 } 3654 /* continue assoc process */ 3655 ifmgd->assoc_data->timeout = jiffies; 3656 ifmgd->assoc_data->timeout_started = true; 3657 run_again(sdata, ifmgd->assoc_data->timeout); 3658 return; 3659 } 3660 3661 if (!ifmgd->associated || 3662 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3663 return; 3664 bssid = ifmgd->associated->bssid; 3665 3666 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3667 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3668 local, rx_status); 3669 3670 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3671 mlme_dbg_ratelimited(sdata, 3672 "cancelling AP probe due to a received beacon\n"); 3673 ieee80211_reset_ap_probe(sdata); 3674 } 3675 3676 /* 3677 * Push the beacon loss detection into the future since 3678 * we are processing a beacon from the AP just now. 3679 */ 3680 ieee80211_sta_reset_beacon_monitor(sdata); 3681 3682 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3683 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3684 len - baselen, false, &elems, 3685 care_about_ies, ncrc); 3686 3687 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3688 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3689 if (local->hw.conf.dynamic_ps_timeout > 0) { 3690 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3691 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3692 ieee80211_hw_config(local, 3693 IEEE80211_CONF_CHANGE_PS); 3694 } 3695 ieee80211_send_nullfunc(local, sdata, false); 3696 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3697 local->pspolling = true; 3698 3699 /* 3700 * Here is assumed that the driver will be 3701 * able to send ps-poll frame and receive a 3702 * response even though power save mode is 3703 * enabled, but some drivers might require 3704 * to disable power save here. This needs 3705 * to be investigated. 3706 */ 3707 ieee80211_send_pspoll(local, sdata); 3708 } 3709 } 3710 3711 if (sdata->vif.p2p || 3712 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3713 struct ieee80211_p2p_noa_attr noa = {}; 3714 int ret; 3715 3716 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3717 len - baselen, 3718 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3719 (u8 *) &noa, sizeof(noa)); 3720 if (ret >= 2) { 3721 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3722 /* valid noa_attr and index changed */ 3723 sdata->u.mgd.p2p_noa_index = noa.index; 3724 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3725 changed |= BSS_CHANGED_P2P_PS; 3726 /* 3727 * make sure we update all information, the CRC 3728 * mechanism doesn't look at P2P attributes. 3729 */ 3730 ifmgd->beacon_crc_valid = false; 3731 } 3732 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3733 /* noa_attr not found and we had valid noa_attr before */ 3734 sdata->u.mgd.p2p_noa_index = -1; 3735 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3736 changed |= BSS_CHANGED_P2P_PS; 3737 ifmgd->beacon_crc_valid = false; 3738 } 3739 } 3740 3741 if (ifmgd->csa_waiting_bcn) 3742 ieee80211_chswitch_post_beacon(sdata); 3743 3744 /* 3745 * Update beacon timing and dtim count on every beacon appearance. This 3746 * will allow the driver to use the most updated values. Do it before 3747 * comparing this one with last received beacon. 3748 * IMPORTANT: These parameters would possibly be out of sync by the time 3749 * the driver will use them. The synchronized view is currently 3750 * guaranteed only in certain callbacks. 3751 */ 3752 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3753 sdata->vif.bss_conf.sync_tsf = 3754 le64_to_cpu(mgmt->u.beacon.timestamp); 3755 sdata->vif.bss_conf.sync_device_ts = 3756 rx_status->device_timestamp; 3757 if (elems.tim) 3758 sdata->vif.bss_conf.sync_dtim_count = 3759 elems.tim->dtim_count; 3760 else 3761 sdata->vif.bss_conf.sync_dtim_count = 0; 3762 } 3763 3764 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3765 return; 3766 ifmgd->beacon_crc = ncrc; 3767 ifmgd->beacon_crc_valid = true; 3768 3769 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3770 3771 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3772 rx_status->device_timestamp, 3773 &elems, true); 3774 3775 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3776 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3777 elems.wmm_param_len, 3778 elems.mu_edca_param_set)) 3779 changed |= BSS_CHANGED_QOS; 3780 3781 /* 3782 * If we haven't had a beacon before, tell the driver about the 3783 * DTIM period (and beacon timing if desired) now. 3784 */ 3785 if (!ifmgd->have_beacon) { 3786 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3787 if (elems.tim) 3788 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3789 else 3790 bss_conf->dtim_period = 1; 3791 3792 changed |= BSS_CHANGED_BEACON_INFO; 3793 ifmgd->have_beacon = true; 3794 3795 mutex_lock(&local->iflist_mtx); 3796 ieee80211_recalc_ps(local); 3797 mutex_unlock(&local->iflist_mtx); 3798 3799 ieee80211_recalc_ps_vif(sdata); 3800 } 3801 3802 if (elems.erp_info) { 3803 erp_valid = true; 3804 erp_value = elems.erp_info[0]; 3805 } else { 3806 erp_valid = false; 3807 } 3808 changed |= ieee80211_handle_bss_capability(sdata, 3809 le16_to_cpu(mgmt->u.beacon.capab_info), 3810 erp_valid, erp_value); 3811 3812 mutex_lock(&local->sta_mtx); 3813 sta = sta_info_get(sdata, bssid); 3814 3815 if (ieee80211_config_bw(sdata, sta, 3816 elems.ht_cap_elem, elems.ht_operation, 3817 elems.vht_operation, elems.he_operation, 3818 bssid, &changed)) { 3819 mutex_unlock(&local->sta_mtx); 3820 sdata_info(sdata, 3821 "failed to follow AP %pM bandwidth change, disconnect\n", 3822 bssid); 3823 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3824 WLAN_REASON_DEAUTH_LEAVING, 3825 true, deauth_buf); 3826 ieee80211_report_disconnect(sdata, deauth_buf, 3827 sizeof(deauth_buf), true, 3828 WLAN_REASON_DEAUTH_LEAVING); 3829 return; 3830 } 3831 3832 if (sta && elems.opmode_notif) 3833 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3834 rx_status->band); 3835 mutex_unlock(&local->sta_mtx); 3836 3837 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3838 elems.country_elem, 3839 elems.country_elem_len, 3840 elems.pwr_constr_elem, 3841 elems.cisco_dtpc_elem); 3842 3843 ieee80211_bss_info_change_notify(sdata, changed); 3844 } 3845 3846 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3847 struct sk_buff *skb) 3848 { 3849 struct ieee80211_rx_status *rx_status; 3850 struct ieee80211_mgmt *mgmt; 3851 u16 fc; 3852 struct ieee802_11_elems elems; 3853 int ies_len; 3854 3855 rx_status = (struct ieee80211_rx_status *) skb->cb; 3856 mgmt = (struct ieee80211_mgmt *) skb->data; 3857 fc = le16_to_cpu(mgmt->frame_control); 3858 3859 sdata_lock(sdata); 3860 3861 switch (fc & IEEE80211_FCTL_STYPE) { 3862 case IEEE80211_STYPE_BEACON: 3863 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3864 break; 3865 case IEEE80211_STYPE_PROBE_RESP: 3866 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3867 break; 3868 case IEEE80211_STYPE_AUTH: 3869 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3870 break; 3871 case IEEE80211_STYPE_DEAUTH: 3872 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3873 break; 3874 case IEEE80211_STYPE_DISASSOC: 3875 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3876 break; 3877 case IEEE80211_STYPE_ASSOC_RESP: 3878 case IEEE80211_STYPE_REASSOC_RESP: 3879 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3880 break; 3881 case IEEE80211_STYPE_ACTION: 3882 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3883 ies_len = skb->len - 3884 offsetof(struct ieee80211_mgmt, 3885 u.action.u.chan_switch.variable); 3886 3887 if (ies_len < 0) 3888 break; 3889 3890 ieee802_11_parse_elems( 3891 mgmt->u.action.u.chan_switch.variable, 3892 ies_len, true, &elems); 3893 3894 if (elems.parse_error) 3895 break; 3896 3897 ieee80211_sta_process_chanswitch(sdata, 3898 rx_status->mactime, 3899 rx_status->device_timestamp, 3900 &elems, false); 3901 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3902 ies_len = skb->len - 3903 offsetof(struct ieee80211_mgmt, 3904 u.action.u.ext_chan_switch.variable); 3905 3906 if (ies_len < 0) 3907 break; 3908 3909 ieee802_11_parse_elems( 3910 mgmt->u.action.u.ext_chan_switch.variable, 3911 ies_len, true, &elems); 3912 3913 if (elems.parse_error) 3914 break; 3915 3916 /* for the handling code pretend this was also an IE */ 3917 elems.ext_chansw_ie = 3918 &mgmt->u.action.u.ext_chan_switch.data; 3919 3920 ieee80211_sta_process_chanswitch(sdata, 3921 rx_status->mactime, 3922 rx_status->device_timestamp, 3923 &elems, false); 3924 } 3925 break; 3926 } 3927 sdata_unlock(sdata); 3928 } 3929 3930 static void ieee80211_sta_timer(struct timer_list *t) 3931 { 3932 struct ieee80211_sub_if_data *sdata = 3933 from_timer(sdata, t, u.mgd.timer); 3934 3935 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3936 } 3937 3938 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3939 u8 *bssid, u8 reason, bool tx) 3940 { 3941 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3942 3943 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3944 tx, frame_buf); 3945 3946 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3947 reason); 3948 } 3949 3950 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3951 { 3952 struct ieee80211_local *local = sdata->local; 3953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3954 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3955 u32 tx_flags = 0; 3956 u16 trans = 1; 3957 u16 status = 0; 3958 u16 prepare_tx_duration = 0; 3959 3960 sdata_assert_lock(sdata); 3961 3962 if (WARN_ON_ONCE(!auth_data)) 3963 return -EINVAL; 3964 3965 auth_data->tries++; 3966 3967 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3968 sdata_info(sdata, "authentication with %pM timed out\n", 3969 auth_data->bss->bssid); 3970 3971 /* 3972 * Most likely AP is not in the range so remove the 3973 * bss struct for that AP. 3974 */ 3975 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3976 3977 return -ETIMEDOUT; 3978 } 3979 3980 if (auth_data->algorithm == WLAN_AUTH_SAE) 3981 prepare_tx_duration = 3982 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 3983 3984 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 3985 3986 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3987 auth_data->bss->bssid, auth_data->tries, 3988 IEEE80211_AUTH_MAX_TRIES); 3989 3990 auth_data->expected_transaction = 2; 3991 3992 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3993 trans = auth_data->sae_trans; 3994 status = auth_data->sae_status; 3995 auth_data->expected_transaction = trans; 3996 } 3997 3998 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3999 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4000 IEEE80211_TX_INTFL_MLME_CONN_TX; 4001 4002 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4003 auth_data->data, auth_data->data_len, 4004 auth_data->bss->bssid, 4005 auth_data->bss->bssid, NULL, 0, 0, 4006 tx_flags); 4007 4008 if (tx_flags == 0) { 4009 if (auth_data->algorithm == WLAN_AUTH_SAE) 4010 auth_data->timeout = jiffies + 4011 IEEE80211_AUTH_TIMEOUT_SAE; 4012 else 4013 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4014 } else { 4015 auth_data->timeout = 4016 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4017 } 4018 4019 auth_data->timeout_started = true; 4020 run_again(sdata, auth_data->timeout); 4021 4022 return 0; 4023 } 4024 4025 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4026 { 4027 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4028 struct ieee80211_local *local = sdata->local; 4029 4030 sdata_assert_lock(sdata); 4031 4032 assoc_data->tries++; 4033 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4034 sdata_info(sdata, "association with %pM timed out\n", 4035 assoc_data->bss->bssid); 4036 4037 /* 4038 * Most likely AP is not in the range so remove the 4039 * bss struct for that AP. 4040 */ 4041 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4042 4043 return -ETIMEDOUT; 4044 } 4045 4046 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4047 assoc_data->bss->bssid, assoc_data->tries, 4048 IEEE80211_ASSOC_MAX_TRIES); 4049 ieee80211_send_assoc(sdata); 4050 4051 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4052 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4053 assoc_data->timeout_started = true; 4054 run_again(sdata, assoc_data->timeout); 4055 } else { 4056 assoc_data->timeout = 4057 round_jiffies_up(jiffies + 4058 IEEE80211_ASSOC_TIMEOUT_LONG); 4059 assoc_data->timeout_started = true; 4060 run_again(sdata, assoc_data->timeout); 4061 } 4062 4063 return 0; 4064 } 4065 4066 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4067 __le16 fc, bool acked) 4068 { 4069 struct ieee80211_local *local = sdata->local; 4070 4071 sdata->u.mgd.status_fc = fc; 4072 sdata->u.mgd.status_acked = acked; 4073 sdata->u.mgd.status_received = true; 4074 4075 ieee80211_queue_work(&local->hw, &sdata->work); 4076 } 4077 4078 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4079 { 4080 struct ieee80211_local *local = sdata->local; 4081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4082 4083 sdata_lock(sdata); 4084 4085 if (ifmgd->status_received) { 4086 __le16 fc = ifmgd->status_fc; 4087 bool status_acked = ifmgd->status_acked; 4088 4089 ifmgd->status_received = false; 4090 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4091 if (status_acked) { 4092 if (ifmgd->auth_data->algorithm == 4093 WLAN_AUTH_SAE) 4094 ifmgd->auth_data->timeout = 4095 jiffies + 4096 IEEE80211_AUTH_TIMEOUT_SAE; 4097 else 4098 ifmgd->auth_data->timeout = 4099 jiffies + 4100 IEEE80211_AUTH_TIMEOUT_SHORT; 4101 run_again(sdata, ifmgd->auth_data->timeout); 4102 } else { 4103 ifmgd->auth_data->timeout = jiffies - 1; 4104 } 4105 ifmgd->auth_data->timeout_started = true; 4106 } else if (ifmgd->assoc_data && 4107 (ieee80211_is_assoc_req(fc) || 4108 ieee80211_is_reassoc_req(fc))) { 4109 if (status_acked) { 4110 ifmgd->assoc_data->timeout = 4111 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4112 run_again(sdata, ifmgd->assoc_data->timeout); 4113 } else { 4114 ifmgd->assoc_data->timeout = jiffies - 1; 4115 } 4116 ifmgd->assoc_data->timeout_started = true; 4117 } 4118 } 4119 4120 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4121 time_after(jiffies, ifmgd->auth_data->timeout)) { 4122 if (ifmgd->auth_data->done) { 4123 /* 4124 * ok ... we waited for assoc but userspace didn't, 4125 * so let's just kill the auth data 4126 */ 4127 ieee80211_destroy_auth_data(sdata, false); 4128 } else if (ieee80211_auth(sdata)) { 4129 u8 bssid[ETH_ALEN]; 4130 struct ieee80211_event event = { 4131 .type = MLME_EVENT, 4132 .u.mlme.data = AUTH_EVENT, 4133 .u.mlme.status = MLME_TIMEOUT, 4134 }; 4135 4136 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4137 4138 ieee80211_destroy_auth_data(sdata, false); 4139 4140 cfg80211_auth_timeout(sdata->dev, bssid); 4141 drv_event_callback(sdata->local, sdata, &event); 4142 } 4143 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4144 run_again(sdata, ifmgd->auth_data->timeout); 4145 4146 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4147 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4148 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4149 ieee80211_do_assoc(sdata)) { 4150 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4151 struct ieee80211_event event = { 4152 .type = MLME_EVENT, 4153 .u.mlme.data = ASSOC_EVENT, 4154 .u.mlme.status = MLME_TIMEOUT, 4155 }; 4156 4157 ieee80211_destroy_assoc_data(sdata, false, false); 4158 cfg80211_assoc_timeout(sdata->dev, bss); 4159 drv_event_callback(sdata->local, sdata, &event); 4160 } 4161 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4162 run_again(sdata, ifmgd->assoc_data->timeout); 4163 4164 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4165 ifmgd->associated) { 4166 u8 bssid[ETH_ALEN]; 4167 int max_tries; 4168 4169 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4170 4171 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4172 max_tries = max_nullfunc_tries; 4173 else 4174 max_tries = max_probe_tries; 4175 4176 /* ACK received for nullfunc probing frame */ 4177 if (!ifmgd->probe_send_count) 4178 ieee80211_reset_ap_probe(sdata); 4179 else if (ifmgd->nullfunc_failed) { 4180 if (ifmgd->probe_send_count < max_tries) { 4181 mlme_dbg(sdata, 4182 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4183 bssid, ifmgd->probe_send_count, 4184 max_tries); 4185 ieee80211_mgd_probe_ap_send(sdata); 4186 } else { 4187 mlme_dbg(sdata, 4188 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4189 bssid); 4190 ieee80211_sta_connection_lost(sdata, bssid, 4191 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4192 false); 4193 } 4194 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4195 run_again(sdata, ifmgd->probe_timeout); 4196 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4197 mlme_dbg(sdata, 4198 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4199 bssid, probe_wait_ms); 4200 ieee80211_sta_connection_lost(sdata, bssid, 4201 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4202 } else if (ifmgd->probe_send_count < max_tries) { 4203 mlme_dbg(sdata, 4204 "No probe response from AP %pM after %dms, try %d/%i\n", 4205 bssid, probe_wait_ms, 4206 ifmgd->probe_send_count, max_tries); 4207 ieee80211_mgd_probe_ap_send(sdata); 4208 } else { 4209 /* 4210 * We actually lost the connection ... or did we? 4211 * Let's make sure! 4212 */ 4213 mlme_dbg(sdata, 4214 "No probe response from AP %pM after %dms, disconnecting.\n", 4215 bssid, probe_wait_ms); 4216 4217 ieee80211_sta_connection_lost(sdata, bssid, 4218 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4219 } 4220 } 4221 4222 sdata_unlock(sdata); 4223 } 4224 4225 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4226 { 4227 struct ieee80211_sub_if_data *sdata = 4228 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4230 4231 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4232 return; 4233 4234 sdata->u.mgd.connection_loss = false; 4235 ieee80211_queue_work(&sdata->local->hw, 4236 &sdata->u.mgd.beacon_connection_loss_work); 4237 } 4238 4239 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4240 { 4241 struct ieee80211_sub_if_data *sdata = 4242 from_timer(sdata, t, u.mgd.conn_mon_timer); 4243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4244 struct ieee80211_local *local = sdata->local; 4245 4246 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4247 return; 4248 4249 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4250 } 4251 4252 static void ieee80211_sta_monitor_work(struct work_struct *work) 4253 { 4254 struct ieee80211_sub_if_data *sdata = 4255 container_of(work, struct ieee80211_sub_if_data, 4256 u.mgd.monitor_work); 4257 4258 ieee80211_mgd_probe_ap(sdata, false); 4259 } 4260 4261 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4262 { 4263 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4264 __ieee80211_stop_poll(sdata); 4265 4266 /* let's probe the connection once */ 4267 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4268 ieee80211_queue_work(&sdata->local->hw, 4269 &sdata->u.mgd.monitor_work); 4270 } 4271 } 4272 4273 #ifdef CONFIG_PM 4274 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4275 { 4276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4277 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4278 4279 sdata_lock(sdata); 4280 4281 if (ifmgd->auth_data || ifmgd->assoc_data) { 4282 const u8 *bssid = ifmgd->auth_data ? 4283 ifmgd->auth_data->bss->bssid : 4284 ifmgd->assoc_data->bss->bssid; 4285 4286 /* 4287 * If we are trying to authenticate / associate while suspending, 4288 * cfg80211 won't know and won't actually abort those attempts, 4289 * thus we need to do that ourselves. 4290 */ 4291 ieee80211_send_deauth_disassoc(sdata, bssid, 4292 IEEE80211_STYPE_DEAUTH, 4293 WLAN_REASON_DEAUTH_LEAVING, 4294 false, frame_buf); 4295 if (ifmgd->assoc_data) 4296 ieee80211_destroy_assoc_data(sdata, false, true); 4297 if (ifmgd->auth_data) 4298 ieee80211_destroy_auth_data(sdata, false); 4299 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4300 IEEE80211_DEAUTH_FRAME_LEN); 4301 } 4302 4303 /* This is a bit of a hack - we should find a better and more generic 4304 * solution to this. Normally when suspending, cfg80211 will in fact 4305 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4306 * auth (not so important) or assoc (this is the problem) process. 4307 * 4308 * As a consequence, it can happen that we are in the process of both 4309 * associating and suspending, and receive an association response 4310 * after cfg80211 has checked if it needs to disconnect, but before 4311 * we actually set the flag to drop incoming frames. This will then 4312 * cause the workqueue flush to process the association response in 4313 * the suspend, resulting in a successful association just before it 4314 * tries to remove the interface from the driver, which now though 4315 * has a channel context assigned ... this results in issues. 4316 * 4317 * To work around this (for now) simply deauth here again if we're 4318 * now connected. 4319 */ 4320 if (ifmgd->associated && !sdata->local->wowlan) { 4321 u8 bssid[ETH_ALEN]; 4322 struct cfg80211_deauth_request req = { 4323 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4324 .bssid = bssid, 4325 }; 4326 4327 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4328 ieee80211_mgd_deauth(sdata, &req); 4329 } 4330 4331 sdata_unlock(sdata); 4332 } 4333 4334 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4335 { 4336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4337 4338 sdata_lock(sdata); 4339 if (!ifmgd->associated) { 4340 sdata_unlock(sdata); 4341 return; 4342 } 4343 4344 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4345 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4346 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4347 ieee80211_sta_connection_lost(sdata, 4348 ifmgd->associated->bssid, 4349 WLAN_REASON_UNSPECIFIED, 4350 true); 4351 sdata_unlock(sdata); 4352 return; 4353 } 4354 sdata_unlock(sdata); 4355 } 4356 #endif 4357 4358 /* interface setup */ 4359 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4360 { 4361 struct ieee80211_if_managed *ifmgd; 4362 4363 ifmgd = &sdata->u.mgd; 4364 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4365 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4366 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4367 ieee80211_beacon_connection_loss_work); 4368 INIT_WORK(&ifmgd->csa_connection_drop_work, 4369 ieee80211_csa_connection_drop_work); 4370 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4371 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4372 ieee80211_tdls_peer_del_work); 4373 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4374 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4375 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4376 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4377 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4378 ieee80211_sta_handle_tspec_ac_params_wk); 4379 4380 ifmgd->flags = 0; 4381 ifmgd->powersave = sdata->wdev.ps; 4382 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4383 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4384 ifmgd->p2p_noa_index = -1; 4385 4386 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4387 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4388 else 4389 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4390 4391 /* Setup TDLS data */ 4392 spin_lock_init(&ifmgd->teardown_lock); 4393 ifmgd->teardown_skb = NULL; 4394 ifmgd->orig_teardown_skb = NULL; 4395 } 4396 4397 /* scan finished notification */ 4398 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4399 { 4400 struct ieee80211_sub_if_data *sdata; 4401 4402 /* Restart STA timers */ 4403 rcu_read_lock(); 4404 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4405 if (ieee80211_sdata_running(sdata)) 4406 ieee80211_restart_sta_timer(sdata); 4407 } 4408 rcu_read_unlock(); 4409 } 4410 4411 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4412 struct cfg80211_bss *cbss) 4413 { 4414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4415 const u8 *ht_cap_ie, *vht_cap_ie; 4416 const struct ieee80211_ht_cap *ht_cap; 4417 const struct ieee80211_vht_cap *vht_cap; 4418 u8 chains = 1; 4419 4420 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4421 return chains; 4422 4423 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4424 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4425 ht_cap = (void *)(ht_cap_ie + 2); 4426 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4427 /* 4428 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4429 * "Tx Unequal Modulation Supported" fields. 4430 */ 4431 } 4432 4433 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4434 return chains; 4435 4436 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4437 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4438 u8 nss; 4439 u16 tx_mcs_map; 4440 4441 vht_cap = (void *)(vht_cap_ie + 2); 4442 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4443 for (nss = 8; nss > 0; nss--) { 4444 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4445 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4446 break; 4447 } 4448 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4449 chains = max(chains, nss); 4450 } 4451 4452 return chains; 4453 } 4454 4455 static bool 4456 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4457 const struct ieee80211_he_operation *he_op) 4458 { 4459 const struct ieee80211_sta_he_cap *sta_he_cap = 4460 ieee80211_get_he_sta_cap(sband); 4461 u16 ap_min_req_set; 4462 int i; 4463 4464 if (!sta_he_cap || !he_op) 4465 return false; 4466 4467 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4468 4469 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4470 for (i = 0; i < 3; i++) { 4471 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4472 &sta_he_cap->he_mcs_nss_supp; 4473 u16 sta_mcs_map_rx = 4474 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4475 u16 sta_mcs_map_tx = 4476 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4477 u8 nss; 4478 bool verified = true; 4479 4480 /* 4481 * For each band there is a maximum of 8 spatial streams 4482 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4483 * of 2 bits per NSS (1-8), with the values defined in enum 4484 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4485 * capabilities aren't less than the AP's minimum requirements 4486 * for this HE BSS per SS. 4487 * It is enough to find one such band that meets the reqs. 4488 */ 4489 for (nss = 8; nss > 0; nss--) { 4490 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4491 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4492 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4493 4494 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4495 continue; 4496 4497 /* 4498 * Make sure the HE AP doesn't require MCSs that aren't 4499 * supported by the client 4500 */ 4501 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4502 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4503 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4504 verified = false; 4505 break; 4506 } 4507 } 4508 4509 if (verified) 4510 return true; 4511 } 4512 4513 /* If here, STA doesn't meet AP's HE min requirements */ 4514 return false; 4515 } 4516 4517 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4518 struct cfg80211_bss *cbss) 4519 { 4520 struct ieee80211_local *local = sdata->local; 4521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4522 const struct ieee80211_ht_cap *ht_cap = NULL; 4523 const struct ieee80211_ht_operation *ht_oper = NULL; 4524 const struct ieee80211_vht_operation *vht_oper = NULL; 4525 const struct ieee80211_he_operation *he_oper = NULL; 4526 struct ieee80211_supported_band *sband; 4527 struct cfg80211_chan_def chandef; 4528 int ret; 4529 u32 i; 4530 bool have_80mhz; 4531 4532 sband = local->hw.wiphy->bands[cbss->channel->band]; 4533 4534 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4535 IEEE80211_STA_DISABLE_80P80MHZ | 4536 IEEE80211_STA_DISABLE_160MHZ); 4537 4538 rcu_read_lock(); 4539 4540 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4541 sband->ht_cap.ht_supported) { 4542 const u8 *ht_oper_ie, *ht_cap_ie; 4543 4544 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4545 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4546 ht_oper = (void *)(ht_oper_ie + 2); 4547 4548 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4549 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4550 ht_cap = (void *)(ht_cap_ie + 2); 4551 4552 if (!ht_cap) { 4553 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4554 ht_oper = NULL; 4555 } 4556 } 4557 4558 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4559 sband->vht_cap.vht_supported) { 4560 const u8 *vht_oper_ie, *vht_cap; 4561 4562 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4563 WLAN_EID_VHT_OPERATION); 4564 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4565 vht_oper = (void *)(vht_oper_ie + 2); 4566 if (vht_oper && !ht_oper) { 4567 vht_oper = NULL; 4568 sdata_info(sdata, 4569 "AP advertised VHT without HT, disabling both\n"); 4570 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4571 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4572 } 4573 4574 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4575 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4576 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4577 vht_oper = NULL; 4578 } 4579 } 4580 4581 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 4582 ieee80211_get_he_sta_cap(sband)) { 4583 const struct cfg80211_bss_ies *ies; 4584 const u8 *he_oper_ie; 4585 4586 ies = rcu_dereference(cbss->ies); 4587 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4588 ies->data, ies->len); 4589 if (he_oper_ie && 4590 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4591 he_oper = (void *)(he_oper_ie + 3); 4592 else 4593 he_oper = NULL; 4594 4595 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4596 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4597 } 4598 4599 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4600 have_80mhz = false; 4601 for (i = 0; i < sband->n_channels; i++) { 4602 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4603 IEEE80211_CHAN_NO_80MHZ)) 4604 continue; 4605 4606 have_80mhz = true; 4607 break; 4608 } 4609 4610 if (!have_80mhz) 4611 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4612 4613 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4614 cbss->channel, 4615 ht_oper, vht_oper, he_oper, 4616 &chandef, false); 4617 4618 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4619 local->rx_chains); 4620 4621 rcu_read_unlock(); 4622 4623 /* will change later if needed */ 4624 sdata->smps_mode = IEEE80211_SMPS_OFF; 4625 4626 mutex_lock(&local->mtx); 4627 /* 4628 * If this fails (possibly due to channel context sharing 4629 * on incompatible channels, e.g. 80+80 and 160 sharing the 4630 * same control channel) try to use a smaller bandwidth. 4631 */ 4632 ret = ieee80211_vif_use_channel(sdata, &chandef, 4633 IEEE80211_CHANCTX_SHARED); 4634 4635 /* don't downgrade for 5 and 10 MHz channels, though. */ 4636 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4637 chandef.width == NL80211_CHAN_WIDTH_10) 4638 goto out; 4639 4640 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4641 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4642 ret = ieee80211_vif_use_channel(sdata, &chandef, 4643 IEEE80211_CHANCTX_SHARED); 4644 } 4645 out: 4646 mutex_unlock(&local->mtx); 4647 return ret; 4648 } 4649 4650 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4651 struct cfg80211_bss *cbss, bool assoc, 4652 bool override) 4653 { 4654 struct ieee80211_local *local = sdata->local; 4655 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4656 struct ieee80211_bss *bss = (void *)cbss->priv; 4657 struct sta_info *new_sta = NULL; 4658 struct ieee80211_supported_band *sband; 4659 bool have_sta = false; 4660 int err; 4661 4662 sband = local->hw.wiphy->bands[cbss->channel->band]; 4663 4664 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4665 return -EINVAL; 4666 4667 /* If a reconfig is happening, bail out */ 4668 if (local->in_reconfig) 4669 return -EBUSY; 4670 4671 if (assoc) { 4672 rcu_read_lock(); 4673 have_sta = sta_info_get(sdata, cbss->bssid); 4674 rcu_read_unlock(); 4675 } 4676 4677 if (!have_sta) { 4678 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4679 if (!new_sta) 4680 return -ENOMEM; 4681 } 4682 4683 /* 4684 * Set up the information for the new channel before setting the 4685 * new channel. We can't - completely race-free - change the basic 4686 * rates bitmap and the channel (sband) that it refers to, but if 4687 * we set it up before we at least avoid calling into the driver's 4688 * bss_info_changed() method with invalid information (since we do 4689 * call that from changing the channel - only for IDLE and perhaps 4690 * some others, but ...). 4691 * 4692 * So to avoid that, just set up all the new information before the 4693 * channel, but tell the driver to apply it only afterwards, since 4694 * it might need the new channel for that. 4695 */ 4696 if (new_sta) { 4697 u32 rates = 0, basic_rates = 0; 4698 bool have_higher_than_11mbit; 4699 int min_rate = INT_MAX, min_rate_index = -1; 4700 const struct cfg80211_bss_ies *ies; 4701 int shift = ieee80211_vif_get_shift(&sdata->vif); 4702 4703 ieee80211_get_rates(sband, bss->supp_rates, 4704 bss->supp_rates_len, 4705 &rates, &basic_rates, 4706 &have_higher_than_11mbit, 4707 &min_rate, &min_rate_index, 4708 shift); 4709 4710 /* 4711 * This used to be a workaround for basic rates missing 4712 * in the association response frame. Now that we no 4713 * longer use the basic rates from there, it probably 4714 * doesn't happen any more, but keep the workaround so 4715 * in case some *other* APs are buggy in different ways 4716 * we can connect -- with a warning. 4717 */ 4718 if (!basic_rates && min_rate_index >= 0) { 4719 sdata_info(sdata, 4720 "No basic rates, using min rate instead\n"); 4721 basic_rates = BIT(min_rate_index); 4722 } 4723 4724 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4725 sdata->vif.bss_conf.basic_rates = basic_rates; 4726 4727 /* cf. IEEE 802.11 9.2.12 */ 4728 if (cbss->channel->band == NL80211_BAND_2GHZ && 4729 have_higher_than_11mbit) 4730 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4731 else 4732 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4733 4734 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4735 4736 /* set timing information */ 4737 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4738 rcu_read_lock(); 4739 ies = rcu_dereference(cbss->beacon_ies); 4740 if (ies) { 4741 const u8 *tim_ie; 4742 4743 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4744 sdata->vif.bss_conf.sync_device_ts = 4745 bss->device_ts_beacon; 4746 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4747 ies->data, ies->len); 4748 if (tim_ie && tim_ie[1] >= 2) 4749 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4750 else 4751 sdata->vif.bss_conf.sync_dtim_count = 0; 4752 } else if (!ieee80211_hw_check(&sdata->local->hw, 4753 TIMING_BEACON_ONLY)) { 4754 ies = rcu_dereference(cbss->proberesp_ies); 4755 /* must be non-NULL since beacon IEs were NULL */ 4756 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4757 sdata->vif.bss_conf.sync_device_ts = 4758 bss->device_ts_presp; 4759 sdata->vif.bss_conf.sync_dtim_count = 0; 4760 } else { 4761 sdata->vif.bss_conf.sync_tsf = 0; 4762 sdata->vif.bss_conf.sync_device_ts = 0; 4763 sdata->vif.bss_conf.sync_dtim_count = 0; 4764 } 4765 rcu_read_unlock(); 4766 } 4767 4768 if (new_sta || override) { 4769 err = ieee80211_prep_channel(sdata, cbss); 4770 if (err) { 4771 if (new_sta) 4772 sta_info_free(local, new_sta); 4773 return -EINVAL; 4774 } 4775 } 4776 4777 if (new_sta) { 4778 /* 4779 * tell driver about BSSID, basic rates and timing 4780 * this was set up above, before setting the channel 4781 */ 4782 ieee80211_bss_info_change_notify(sdata, 4783 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4784 BSS_CHANGED_BEACON_INT); 4785 4786 if (assoc) 4787 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4788 4789 err = sta_info_insert(new_sta); 4790 new_sta = NULL; 4791 if (err) { 4792 sdata_info(sdata, 4793 "failed to insert STA entry for the AP (error %d)\n", 4794 err); 4795 return err; 4796 } 4797 } else 4798 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4799 4800 /* Cancel scan to ensure that nothing interferes with connection */ 4801 if (local->scanning) 4802 ieee80211_scan_cancel(local); 4803 4804 return 0; 4805 } 4806 4807 /* config hooks */ 4808 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4809 struct cfg80211_auth_request *req) 4810 { 4811 struct ieee80211_local *local = sdata->local; 4812 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4813 struct ieee80211_mgd_auth_data *auth_data; 4814 u16 auth_alg; 4815 int err; 4816 4817 /* prepare auth data structure */ 4818 4819 switch (req->auth_type) { 4820 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4821 auth_alg = WLAN_AUTH_OPEN; 4822 break; 4823 case NL80211_AUTHTYPE_SHARED_KEY: 4824 if (IS_ERR(local->wep_tx_tfm)) 4825 return -EOPNOTSUPP; 4826 auth_alg = WLAN_AUTH_SHARED_KEY; 4827 break; 4828 case NL80211_AUTHTYPE_FT: 4829 auth_alg = WLAN_AUTH_FT; 4830 break; 4831 case NL80211_AUTHTYPE_NETWORK_EAP: 4832 auth_alg = WLAN_AUTH_LEAP; 4833 break; 4834 case NL80211_AUTHTYPE_SAE: 4835 auth_alg = WLAN_AUTH_SAE; 4836 break; 4837 case NL80211_AUTHTYPE_FILS_SK: 4838 auth_alg = WLAN_AUTH_FILS_SK; 4839 break; 4840 case NL80211_AUTHTYPE_FILS_SK_PFS: 4841 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4842 break; 4843 case NL80211_AUTHTYPE_FILS_PK: 4844 auth_alg = WLAN_AUTH_FILS_PK; 4845 break; 4846 default: 4847 return -EOPNOTSUPP; 4848 } 4849 4850 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4851 req->ie_len, GFP_KERNEL); 4852 if (!auth_data) 4853 return -ENOMEM; 4854 4855 auth_data->bss = req->bss; 4856 4857 if (req->auth_data_len >= 4) { 4858 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4859 __le16 *pos = (__le16 *) req->auth_data; 4860 4861 auth_data->sae_trans = le16_to_cpu(pos[0]); 4862 auth_data->sae_status = le16_to_cpu(pos[1]); 4863 } 4864 memcpy(auth_data->data, req->auth_data + 4, 4865 req->auth_data_len - 4); 4866 auth_data->data_len += req->auth_data_len - 4; 4867 } 4868 4869 if (req->ie && req->ie_len) { 4870 memcpy(&auth_data->data[auth_data->data_len], 4871 req->ie, req->ie_len); 4872 auth_data->data_len += req->ie_len; 4873 } 4874 4875 if (req->key && req->key_len) { 4876 auth_data->key_len = req->key_len; 4877 auth_data->key_idx = req->key_idx; 4878 memcpy(auth_data->key, req->key, req->key_len); 4879 } 4880 4881 auth_data->algorithm = auth_alg; 4882 4883 /* try to authenticate/probe */ 4884 4885 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4886 ifmgd->assoc_data) { 4887 err = -EBUSY; 4888 goto err_free; 4889 } 4890 4891 if (ifmgd->auth_data) 4892 ieee80211_destroy_auth_data(sdata, false); 4893 4894 /* prep auth_data so we don't go into idle on disassoc */ 4895 ifmgd->auth_data = auth_data; 4896 4897 if (ifmgd->associated) { 4898 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4899 4900 sdata_info(sdata, 4901 "disconnect from AP %pM for new auth to %pM\n", 4902 ifmgd->associated->bssid, req->bss->bssid); 4903 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4904 WLAN_REASON_UNSPECIFIED, 4905 false, frame_buf); 4906 4907 ieee80211_report_disconnect(sdata, frame_buf, 4908 sizeof(frame_buf), true, 4909 WLAN_REASON_UNSPECIFIED); 4910 } 4911 4912 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4913 4914 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4915 if (err) 4916 goto err_clear; 4917 4918 err = ieee80211_auth(sdata); 4919 if (err) { 4920 sta_info_destroy_addr(sdata, req->bss->bssid); 4921 goto err_clear; 4922 } 4923 4924 /* hold our own reference */ 4925 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4926 return 0; 4927 4928 err_clear: 4929 eth_zero_addr(ifmgd->bssid); 4930 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4931 ifmgd->auth_data = NULL; 4932 mutex_lock(&sdata->local->mtx); 4933 ieee80211_vif_release_channel(sdata); 4934 mutex_unlock(&sdata->local->mtx); 4935 err_free: 4936 kfree(auth_data); 4937 return err; 4938 } 4939 4940 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4941 struct cfg80211_assoc_request *req) 4942 { 4943 struct ieee80211_local *local = sdata->local; 4944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4945 struct ieee80211_bss *bss = (void *)req->bss->priv; 4946 struct ieee80211_mgd_assoc_data *assoc_data; 4947 const struct cfg80211_bss_ies *beacon_ies; 4948 struct ieee80211_supported_band *sband; 4949 const u8 *ssidie, *ht_ie, *vht_ie; 4950 int i, err; 4951 bool override = false; 4952 4953 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4954 if (!assoc_data) 4955 return -ENOMEM; 4956 4957 rcu_read_lock(); 4958 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4959 if (!ssidie) { 4960 rcu_read_unlock(); 4961 kfree(assoc_data); 4962 return -EINVAL; 4963 } 4964 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4965 assoc_data->ssid_len = ssidie[1]; 4966 rcu_read_unlock(); 4967 4968 if (ifmgd->associated) { 4969 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4970 4971 sdata_info(sdata, 4972 "disconnect from AP %pM for new assoc to %pM\n", 4973 ifmgd->associated->bssid, req->bss->bssid); 4974 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4975 WLAN_REASON_UNSPECIFIED, 4976 false, frame_buf); 4977 4978 ieee80211_report_disconnect(sdata, frame_buf, 4979 sizeof(frame_buf), true, 4980 WLAN_REASON_UNSPECIFIED); 4981 } 4982 4983 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4984 err = -EBUSY; 4985 goto err_free; 4986 } 4987 4988 if (ifmgd->assoc_data) { 4989 err = -EBUSY; 4990 goto err_free; 4991 } 4992 4993 if (ifmgd->auth_data) { 4994 bool match; 4995 4996 /* keep sta info, bssid if matching */ 4997 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4998 ieee80211_destroy_auth_data(sdata, match); 4999 } 5000 5001 /* prepare assoc data */ 5002 5003 ifmgd->beacon_crc_valid = false; 5004 5005 assoc_data->wmm = bss->wmm_used && 5006 (local->hw.queues >= IEEE80211_NUM_ACS); 5007 5008 /* 5009 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5010 * We still associate in non-HT mode (11a/b/g) if any one of these 5011 * ciphers is configured as pairwise. 5012 * We can set this to true for non-11n hardware, that'll be checked 5013 * separately along with the peer capabilities. 5014 */ 5015 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5016 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5017 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5018 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5019 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5020 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5021 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5022 netdev_info(sdata->dev, 5023 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5024 } 5025 } 5026 5027 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5028 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5029 if (!sband->ht_cap.ht_supported || 5030 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5031 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5032 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5033 if (!bss->wmm_used && 5034 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5035 netdev_info(sdata->dev, 5036 "disabling HT as WMM/QoS is not supported by the AP\n"); 5037 } 5038 5039 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5040 if (!sband->vht_cap.vht_supported || 5041 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5042 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5043 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5044 if (!bss->wmm_used && 5045 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5046 netdev_info(sdata->dev, 5047 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5048 } 5049 5050 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5051 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5052 sizeof(ifmgd->ht_capa_mask)); 5053 5054 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5055 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5056 sizeof(ifmgd->vht_capa_mask)); 5057 5058 if (req->ie && req->ie_len) { 5059 memcpy(assoc_data->ie, req->ie, req->ie_len); 5060 assoc_data->ie_len = req->ie_len; 5061 } 5062 5063 if (req->fils_kek) { 5064 /* should already be checked in cfg80211 - so warn */ 5065 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5066 err = -EINVAL; 5067 goto err_free; 5068 } 5069 memcpy(assoc_data->fils_kek, req->fils_kek, 5070 req->fils_kek_len); 5071 assoc_data->fils_kek_len = req->fils_kek_len; 5072 } 5073 5074 if (req->fils_nonces) 5075 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5076 2 * FILS_NONCE_LEN); 5077 5078 assoc_data->bss = req->bss; 5079 5080 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5081 if (ifmgd->powersave) 5082 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5083 else 5084 sdata->smps_mode = IEEE80211_SMPS_OFF; 5085 } else 5086 sdata->smps_mode = ifmgd->req_smps; 5087 5088 assoc_data->capability = req->bss->capability; 5089 assoc_data->supp_rates = bss->supp_rates; 5090 assoc_data->supp_rates_len = bss->supp_rates_len; 5091 5092 rcu_read_lock(); 5093 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5094 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5095 assoc_data->ap_ht_param = 5096 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5097 else 5098 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5099 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5100 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5101 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5102 sizeof(struct ieee80211_vht_cap)); 5103 else 5104 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5105 rcu_read_unlock(); 5106 5107 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5108 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5109 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5110 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5111 5112 if (bss->wmm_used && bss->uapsd_supported && 5113 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5114 assoc_data->uapsd = true; 5115 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5116 } else { 5117 assoc_data->uapsd = false; 5118 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5119 } 5120 5121 if (req->prev_bssid) 5122 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5123 5124 if (req->use_mfp) { 5125 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5126 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5127 } else { 5128 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5129 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5130 } 5131 5132 if (req->flags & ASSOC_REQ_USE_RRM) 5133 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5134 else 5135 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5136 5137 if (req->crypto.control_port) 5138 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5139 else 5140 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5141 5142 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5143 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5144 sdata->control_port_over_nl80211 = 5145 req->crypto.control_port_over_nl80211; 5146 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5147 sdata->vif.type); 5148 5149 /* kick off associate process */ 5150 5151 ifmgd->assoc_data = assoc_data; 5152 ifmgd->dtim_period = 0; 5153 ifmgd->have_beacon = false; 5154 5155 /* override HT/VHT configuration only if the AP and we support it */ 5156 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5157 struct ieee80211_sta_ht_cap sta_ht_cap; 5158 5159 if (req->flags & ASSOC_REQ_DISABLE_HT) 5160 override = true; 5161 5162 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5163 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5164 5165 /* check for 40 MHz disable override */ 5166 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5167 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5168 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5169 override = true; 5170 5171 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5172 req->flags & ASSOC_REQ_DISABLE_VHT) 5173 override = true; 5174 } 5175 5176 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5177 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5178 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5179 } 5180 5181 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5182 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5183 5184 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5185 if (err) 5186 goto err_clear; 5187 5188 rcu_read_lock(); 5189 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5190 5191 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5192 !beacon_ies) { 5193 /* 5194 * Wait up to one beacon interval ... 5195 * should this be more if we miss one? 5196 */ 5197 sdata_info(sdata, "waiting for beacon from %pM\n", 5198 ifmgd->bssid); 5199 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5200 assoc_data->timeout_started = true; 5201 assoc_data->need_beacon = true; 5202 } else if (beacon_ies) { 5203 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 5204 beacon_ies->data, 5205 beacon_ies->len); 5206 u8 dtim_count = 0; 5207 5208 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 5209 const struct ieee80211_tim_ie *tim; 5210 tim = (void *)(tim_ie + 2); 5211 ifmgd->dtim_period = tim->dtim_period; 5212 dtim_count = tim->dtim_count; 5213 } 5214 ifmgd->have_beacon = true; 5215 assoc_data->timeout = jiffies; 5216 assoc_data->timeout_started = true; 5217 5218 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5219 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5220 sdata->vif.bss_conf.sync_device_ts = 5221 bss->device_ts_beacon; 5222 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5223 } 5224 } else { 5225 assoc_data->timeout = jiffies; 5226 assoc_data->timeout_started = true; 5227 } 5228 rcu_read_unlock(); 5229 5230 run_again(sdata, assoc_data->timeout); 5231 5232 if (bss->corrupt_data) { 5233 char *corrupt_type = "data"; 5234 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5235 if (bss->corrupt_data & 5236 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5237 corrupt_type = "beacon and probe response"; 5238 else 5239 corrupt_type = "beacon"; 5240 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5241 corrupt_type = "probe response"; 5242 sdata_info(sdata, "associating with AP with corrupt %s\n", 5243 corrupt_type); 5244 } 5245 5246 return 0; 5247 err_clear: 5248 eth_zero_addr(ifmgd->bssid); 5249 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5250 ifmgd->assoc_data = NULL; 5251 err_free: 5252 kfree(assoc_data); 5253 return err; 5254 } 5255 5256 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5257 struct cfg80211_deauth_request *req) 5258 { 5259 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5260 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5261 bool tx = !req->local_state_change; 5262 5263 if (ifmgd->auth_data && 5264 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5265 sdata_info(sdata, 5266 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5267 req->bssid, req->reason_code, 5268 ieee80211_get_reason_code_string(req->reason_code)); 5269 5270 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5271 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5272 IEEE80211_STYPE_DEAUTH, 5273 req->reason_code, tx, 5274 frame_buf); 5275 ieee80211_destroy_auth_data(sdata, false); 5276 ieee80211_report_disconnect(sdata, frame_buf, 5277 sizeof(frame_buf), true, 5278 req->reason_code); 5279 5280 return 0; 5281 } 5282 5283 if (ifmgd->assoc_data && 5284 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5285 sdata_info(sdata, 5286 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5287 req->bssid, req->reason_code, 5288 ieee80211_get_reason_code_string(req->reason_code)); 5289 5290 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5291 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5292 IEEE80211_STYPE_DEAUTH, 5293 req->reason_code, tx, 5294 frame_buf); 5295 ieee80211_destroy_assoc_data(sdata, false, true); 5296 ieee80211_report_disconnect(sdata, frame_buf, 5297 sizeof(frame_buf), true, 5298 req->reason_code); 5299 return 0; 5300 } 5301 5302 if (ifmgd->associated && 5303 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5304 sdata_info(sdata, 5305 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5306 req->bssid, req->reason_code, 5307 ieee80211_get_reason_code_string(req->reason_code)); 5308 5309 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5310 req->reason_code, tx, frame_buf); 5311 ieee80211_report_disconnect(sdata, frame_buf, 5312 sizeof(frame_buf), true, 5313 req->reason_code); 5314 return 0; 5315 } 5316 5317 return -ENOTCONN; 5318 } 5319 5320 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5321 struct cfg80211_disassoc_request *req) 5322 { 5323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5324 u8 bssid[ETH_ALEN]; 5325 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5326 5327 /* 5328 * cfg80211 should catch this ... but it's racy since 5329 * we can receive a disassoc frame, process it, hand it 5330 * to cfg80211 while that's in a locked section already 5331 * trying to tell us that the user wants to disconnect. 5332 */ 5333 if (ifmgd->associated != req->bss) 5334 return -ENOLINK; 5335 5336 sdata_info(sdata, 5337 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5338 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5339 5340 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5341 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5342 req->reason_code, !req->local_state_change, 5343 frame_buf); 5344 5345 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5346 req->reason_code); 5347 5348 return 0; 5349 } 5350 5351 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5352 { 5353 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5354 5355 /* 5356 * Make sure some work items will not run after this, 5357 * they will not do anything but might not have been 5358 * cancelled when disconnecting. 5359 */ 5360 cancel_work_sync(&ifmgd->monitor_work); 5361 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5362 cancel_work_sync(&ifmgd->request_smps_work); 5363 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5364 cancel_work_sync(&ifmgd->chswitch_work); 5365 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5366 5367 sdata_lock(sdata); 5368 if (ifmgd->assoc_data) { 5369 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5370 ieee80211_destroy_assoc_data(sdata, false, false); 5371 cfg80211_assoc_timeout(sdata->dev, bss); 5372 } 5373 if (ifmgd->auth_data) 5374 ieee80211_destroy_auth_data(sdata, false); 5375 spin_lock_bh(&ifmgd->teardown_lock); 5376 if (ifmgd->teardown_skb) { 5377 kfree_skb(ifmgd->teardown_skb); 5378 ifmgd->teardown_skb = NULL; 5379 ifmgd->orig_teardown_skb = NULL; 5380 } 5381 spin_unlock_bh(&ifmgd->teardown_lock); 5382 del_timer_sync(&ifmgd->timer); 5383 sdata_unlock(sdata); 5384 } 5385 5386 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5387 enum nl80211_cqm_rssi_threshold_event rssi_event, 5388 s32 rssi_level, 5389 gfp_t gfp) 5390 { 5391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5392 5393 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5394 5395 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5396 } 5397 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5398 5399 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5400 { 5401 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5402 5403 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5404 5405 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5406 } 5407 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5408