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 struct ieee80211_supported_band *sband = NULL; 1077 struct sta_info *mgd_sta = NULL; 1078 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1079 1080 /* 1081 * with multi-vif csa driver may call ieee80211_csa_finish() 1082 * many times while waiting for other interfaces to use their 1083 * reservations 1084 */ 1085 if (sdata->reserved_ready) 1086 goto out; 1087 1088 if (sdata->vif.bss_conf.chandef.width != 1089 sdata->csa_chandef.width) { 1090 /* 1091 * For managed interface, we need to also update the AP 1092 * station bandwidth and align the rate scale algorithm 1093 * on the bandwidth change. Here we only consider the 1094 * bandwidth of the new channel definition (as channel 1095 * switch flow does not have the full HT/VHT/HE 1096 * information), assuming that if additional changes are 1097 * required they would be done as part of the processing 1098 * of the next beacon from the AP. 1099 */ 1100 switch (sdata->csa_chandef.width) { 1101 case NL80211_CHAN_WIDTH_20_NOHT: 1102 case NL80211_CHAN_WIDTH_20: 1103 default: 1104 bw = IEEE80211_STA_RX_BW_20; 1105 break; 1106 case NL80211_CHAN_WIDTH_40: 1107 bw = IEEE80211_STA_RX_BW_40; 1108 break; 1109 case NL80211_CHAN_WIDTH_80: 1110 bw = IEEE80211_STA_RX_BW_80; 1111 break; 1112 case NL80211_CHAN_WIDTH_80P80: 1113 case NL80211_CHAN_WIDTH_160: 1114 bw = IEEE80211_STA_RX_BW_160; 1115 break; 1116 } 1117 1118 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1119 sband = 1120 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1121 } 1122 1123 if (sdata->vif.bss_conf.chandef.width > 1124 sdata->csa_chandef.width) { 1125 mgd_sta->sta.bandwidth = bw; 1126 rate_control_rate_update(local, sband, mgd_sta, 1127 IEEE80211_RC_BW_CHANGED); 1128 } 1129 1130 ret = ieee80211_vif_use_reserved_context(sdata); 1131 if (ret) { 1132 sdata_info(sdata, 1133 "failed to use reserved channel context, disconnecting (err=%d)\n", 1134 ret); 1135 ieee80211_queue_work(&sdata->local->hw, 1136 &ifmgd->csa_connection_drop_work); 1137 goto out; 1138 } 1139 1140 if (sdata->vif.bss_conf.chandef.width < 1141 sdata->csa_chandef.width) { 1142 mgd_sta->sta.bandwidth = bw; 1143 rate_control_rate_update(local, sband, mgd_sta, 1144 IEEE80211_RC_BW_CHANGED); 1145 } 1146 1147 goto out; 1148 } 1149 1150 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1151 &sdata->csa_chandef)) { 1152 sdata_info(sdata, 1153 "failed to finalize channel switch, disconnecting\n"); 1154 ieee80211_queue_work(&sdata->local->hw, 1155 &ifmgd->csa_connection_drop_work); 1156 goto out; 1157 } 1158 1159 /* XXX: shouldn't really modify cfg80211-owned data! */ 1160 ifmgd->associated->channel = sdata->csa_chandef.chan; 1161 1162 ifmgd->csa_waiting_bcn = true; 1163 1164 ieee80211_sta_reset_beacon_monitor(sdata); 1165 ieee80211_sta_reset_conn_monitor(sdata); 1166 1167 out: 1168 mutex_unlock(&local->chanctx_mtx); 1169 mutex_unlock(&local->mtx); 1170 sdata_unlock(sdata); 1171 } 1172 1173 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1174 { 1175 struct ieee80211_local *local = sdata->local; 1176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1177 int ret; 1178 1179 sdata_assert_lock(sdata); 1180 1181 WARN_ON(!sdata->vif.csa_active); 1182 1183 if (sdata->csa_block_tx) { 1184 ieee80211_wake_vif_queues(local, sdata, 1185 IEEE80211_QUEUE_STOP_REASON_CSA); 1186 sdata->csa_block_tx = false; 1187 } 1188 1189 sdata->vif.csa_active = false; 1190 ifmgd->csa_waiting_bcn = false; 1191 1192 ret = drv_post_channel_switch(sdata); 1193 if (ret) { 1194 sdata_info(sdata, 1195 "driver post channel switch failed, disconnecting\n"); 1196 ieee80211_queue_work(&local->hw, 1197 &ifmgd->csa_connection_drop_work); 1198 return; 1199 } 1200 1201 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1202 } 1203 1204 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1205 { 1206 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1208 1209 trace_api_chswitch_done(sdata, success); 1210 if (!success) { 1211 sdata_info(sdata, 1212 "driver channel switch failed, disconnecting\n"); 1213 ieee80211_queue_work(&sdata->local->hw, 1214 &ifmgd->csa_connection_drop_work); 1215 } else { 1216 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1217 } 1218 } 1219 EXPORT_SYMBOL(ieee80211_chswitch_done); 1220 1221 static void ieee80211_chswitch_timer(struct timer_list *t) 1222 { 1223 struct ieee80211_sub_if_data *sdata = 1224 from_timer(sdata, t, u.mgd.chswitch_timer); 1225 1226 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1227 } 1228 1229 static void 1230 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1231 u64 timestamp, u32 device_timestamp, 1232 struct ieee802_11_elems *elems, 1233 bool beacon) 1234 { 1235 struct ieee80211_local *local = sdata->local; 1236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1237 struct cfg80211_bss *cbss = ifmgd->associated; 1238 struct ieee80211_chanctx_conf *conf; 1239 struct ieee80211_chanctx *chanctx; 1240 enum nl80211_band current_band; 1241 struct ieee80211_csa_ie csa_ie; 1242 struct ieee80211_channel_switch ch_switch; 1243 int res; 1244 1245 sdata_assert_lock(sdata); 1246 1247 if (!cbss) 1248 return; 1249 1250 if (local->scanning) 1251 return; 1252 1253 /* disregard subsequent announcements if we are already processing */ 1254 if (sdata->vif.csa_active) 1255 return; 1256 1257 current_band = cbss->channel->band; 1258 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1259 ifmgd->flags, 1260 ifmgd->associated->bssid, &csa_ie); 1261 if (res < 0) 1262 ieee80211_queue_work(&local->hw, 1263 &ifmgd->csa_connection_drop_work); 1264 if (res) 1265 return; 1266 1267 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1268 IEEE80211_CHAN_DISABLED)) { 1269 sdata_info(sdata, 1270 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1271 ifmgd->associated->bssid, 1272 csa_ie.chandef.chan->center_freq, 1273 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1274 csa_ie.chandef.center_freq2); 1275 ieee80211_queue_work(&local->hw, 1276 &ifmgd->csa_connection_drop_work); 1277 return; 1278 } 1279 1280 if (cfg80211_chandef_identical(&csa_ie.chandef, 1281 &sdata->vif.bss_conf.chandef)) { 1282 if (ifmgd->csa_ignored_same_chan) 1283 return; 1284 sdata_info(sdata, 1285 "AP %pM tries to chanswitch to same channel, ignore\n", 1286 ifmgd->associated->bssid); 1287 ifmgd->csa_ignored_same_chan = true; 1288 return; 1289 } 1290 1291 /* 1292 * Drop all TDLS peers - either we disconnect or move to a different 1293 * channel from this point on. There's no telling what our peer will do. 1294 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1295 * have an incompatible wider chandef. 1296 */ 1297 ieee80211_teardown_tdls_peers(sdata); 1298 1299 mutex_lock(&local->mtx); 1300 mutex_lock(&local->chanctx_mtx); 1301 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1302 lockdep_is_held(&local->chanctx_mtx)); 1303 if (!conf) { 1304 sdata_info(sdata, 1305 "no channel context assigned to vif?, disconnecting\n"); 1306 goto drop_connection; 1307 } 1308 1309 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1310 1311 if (local->use_chanctx && 1312 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1313 sdata_info(sdata, 1314 "driver doesn't support chan-switch with channel contexts\n"); 1315 goto drop_connection; 1316 } 1317 1318 ch_switch.timestamp = timestamp; 1319 ch_switch.device_timestamp = device_timestamp; 1320 ch_switch.block_tx = csa_ie.mode; 1321 ch_switch.chandef = csa_ie.chandef; 1322 ch_switch.count = csa_ie.count; 1323 1324 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1325 sdata_info(sdata, 1326 "preparing for channel switch failed, disconnecting\n"); 1327 goto drop_connection; 1328 } 1329 1330 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1331 chanctx->mode, false); 1332 if (res) { 1333 sdata_info(sdata, 1334 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1335 res); 1336 goto drop_connection; 1337 } 1338 mutex_unlock(&local->chanctx_mtx); 1339 1340 sdata->vif.csa_active = true; 1341 sdata->csa_chandef = csa_ie.chandef; 1342 sdata->csa_block_tx = csa_ie.mode; 1343 ifmgd->csa_ignored_same_chan = false; 1344 1345 if (sdata->csa_block_tx) 1346 ieee80211_stop_vif_queues(local, sdata, 1347 IEEE80211_QUEUE_STOP_REASON_CSA); 1348 mutex_unlock(&local->mtx); 1349 1350 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1351 csa_ie.count); 1352 1353 if (local->ops->channel_switch) { 1354 /* use driver's channel switch callback */ 1355 drv_channel_switch(local, sdata, &ch_switch); 1356 return; 1357 } 1358 1359 /* channel switch handled in software */ 1360 if (csa_ie.count <= 1) 1361 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1362 else 1363 mod_timer(&ifmgd->chswitch_timer, 1364 TU_TO_EXP_TIME((csa_ie.count - 1) * 1365 cbss->beacon_interval)); 1366 return; 1367 drop_connection: 1368 /* 1369 * This is just so that the disconnect flow will know that 1370 * we were trying to switch channel and failed. In case the 1371 * mode is 1 (we are not allowed to Tx), we will know not to 1372 * send a deauthentication frame. Those two fields will be 1373 * reset when the disconnection worker runs. 1374 */ 1375 sdata->vif.csa_active = true; 1376 sdata->csa_block_tx = csa_ie.mode; 1377 1378 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1379 mutex_unlock(&local->chanctx_mtx); 1380 mutex_unlock(&local->mtx); 1381 } 1382 1383 static bool 1384 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1385 struct ieee80211_channel *channel, 1386 const u8 *country_ie, u8 country_ie_len, 1387 const u8 *pwr_constr_elem, 1388 int *chan_pwr, int *pwr_reduction) 1389 { 1390 struct ieee80211_country_ie_triplet *triplet; 1391 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1392 int i, chan_increment; 1393 bool have_chan_pwr = false; 1394 1395 /* Invalid IE */ 1396 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1397 return false; 1398 1399 triplet = (void *)(country_ie + 3); 1400 country_ie_len -= 3; 1401 1402 switch (channel->band) { 1403 default: 1404 WARN_ON_ONCE(1); 1405 /* fall through */ 1406 case NL80211_BAND_2GHZ: 1407 case NL80211_BAND_60GHZ: 1408 chan_increment = 1; 1409 break; 1410 case NL80211_BAND_5GHZ: 1411 chan_increment = 4; 1412 break; 1413 } 1414 1415 /* find channel */ 1416 while (country_ie_len >= 3) { 1417 u8 first_channel = triplet->chans.first_channel; 1418 1419 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1420 goto next; 1421 1422 for (i = 0; i < triplet->chans.num_channels; i++) { 1423 if (first_channel + i * chan_increment == chan) { 1424 have_chan_pwr = true; 1425 *chan_pwr = triplet->chans.max_power; 1426 break; 1427 } 1428 } 1429 if (have_chan_pwr) 1430 break; 1431 1432 next: 1433 triplet++; 1434 country_ie_len -= 3; 1435 } 1436 1437 if (have_chan_pwr && pwr_constr_elem) 1438 *pwr_reduction = *pwr_constr_elem; 1439 else 1440 *pwr_reduction = 0; 1441 1442 return have_chan_pwr; 1443 } 1444 1445 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1446 struct ieee80211_channel *channel, 1447 const u8 *cisco_dtpc_ie, 1448 int *pwr_level) 1449 { 1450 /* From practical testing, the first data byte of the DTPC element 1451 * seems to contain the requested dBm level, and the CLI on Cisco 1452 * APs clearly state the range is -127 to 127 dBm, which indicates 1453 * a signed byte, although it seemingly never actually goes negative. 1454 * The other byte seems to always be zero. 1455 */ 1456 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1457 } 1458 1459 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1460 struct ieee80211_channel *channel, 1461 struct ieee80211_mgmt *mgmt, 1462 const u8 *country_ie, u8 country_ie_len, 1463 const u8 *pwr_constr_ie, 1464 const u8 *cisco_dtpc_ie) 1465 { 1466 bool has_80211h_pwr = false, has_cisco_pwr = false; 1467 int chan_pwr = 0, pwr_reduction_80211h = 0; 1468 int pwr_level_cisco, pwr_level_80211h; 1469 int new_ap_level; 1470 __le16 capab = mgmt->u.probe_resp.capab_info; 1471 1472 if (country_ie && 1473 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1474 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1475 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1476 sdata, channel, country_ie, country_ie_len, 1477 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1478 pwr_level_80211h = 1479 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1480 } 1481 1482 if (cisco_dtpc_ie) { 1483 ieee80211_find_cisco_dtpc( 1484 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1485 has_cisco_pwr = true; 1486 } 1487 1488 if (!has_80211h_pwr && !has_cisco_pwr) 1489 return 0; 1490 1491 /* If we have both 802.11h and Cisco DTPC, apply both limits 1492 * by picking the smallest of the two power levels advertised. 1493 */ 1494 if (has_80211h_pwr && 1495 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1496 new_ap_level = pwr_level_80211h; 1497 1498 if (sdata->ap_power_level == new_ap_level) 1499 return 0; 1500 1501 sdata_dbg(sdata, 1502 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1503 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1504 sdata->u.mgd.bssid); 1505 } else { /* has_cisco_pwr is always true here. */ 1506 new_ap_level = pwr_level_cisco; 1507 1508 if (sdata->ap_power_level == new_ap_level) 1509 return 0; 1510 1511 sdata_dbg(sdata, 1512 "Limiting TX power to %d dBm as advertised by %pM\n", 1513 pwr_level_cisco, sdata->u.mgd.bssid); 1514 } 1515 1516 sdata->ap_power_level = new_ap_level; 1517 if (__ieee80211_recalc_txpower(sdata)) 1518 return BSS_CHANGED_TXPOWER; 1519 return 0; 1520 } 1521 1522 /* powersave */ 1523 static void ieee80211_enable_ps(struct ieee80211_local *local, 1524 struct ieee80211_sub_if_data *sdata) 1525 { 1526 struct ieee80211_conf *conf = &local->hw.conf; 1527 1528 /* 1529 * If we are scanning right now then the parameters will 1530 * take effect when scan finishes. 1531 */ 1532 if (local->scanning) 1533 return; 1534 1535 if (conf->dynamic_ps_timeout > 0 && 1536 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1537 mod_timer(&local->dynamic_ps_timer, jiffies + 1538 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1539 } else { 1540 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1541 ieee80211_send_nullfunc(local, sdata, true); 1542 1543 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1544 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1545 return; 1546 1547 conf->flags |= IEEE80211_CONF_PS; 1548 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1549 } 1550 } 1551 1552 static void ieee80211_change_ps(struct ieee80211_local *local) 1553 { 1554 struct ieee80211_conf *conf = &local->hw.conf; 1555 1556 if (local->ps_sdata) { 1557 ieee80211_enable_ps(local, local->ps_sdata); 1558 } else if (conf->flags & IEEE80211_CONF_PS) { 1559 conf->flags &= ~IEEE80211_CONF_PS; 1560 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1561 del_timer_sync(&local->dynamic_ps_timer); 1562 cancel_work_sync(&local->dynamic_ps_enable_work); 1563 } 1564 } 1565 1566 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1567 { 1568 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1569 struct sta_info *sta = NULL; 1570 bool authorized = false; 1571 1572 if (!mgd->powersave) 1573 return false; 1574 1575 if (mgd->broken_ap) 1576 return false; 1577 1578 if (!mgd->associated) 1579 return false; 1580 1581 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1582 return false; 1583 1584 if (!mgd->have_beacon) 1585 return false; 1586 1587 rcu_read_lock(); 1588 sta = sta_info_get(sdata, mgd->bssid); 1589 if (sta) 1590 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1591 rcu_read_unlock(); 1592 1593 return authorized; 1594 } 1595 1596 /* need to hold RTNL or interface lock */ 1597 void ieee80211_recalc_ps(struct ieee80211_local *local) 1598 { 1599 struct ieee80211_sub_if_data *sdata, *found = NULL; 1600 int count = 0; 1601 int timeout; 1602 1603 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1604 local->ps_sdata = NULL; 1605 return; 1606 } 1607 1608 list_for_each_entry(sdata, &local->interfaces, list) { 1609 if (!ieee80211_sdata_running(sdata)) 1610 continue; 1611 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1612 /* If an AP vif is found, then disable PS 1613 * by setting the count to zero thereby setting 1614 * ps_sdata to NULL. 1615 */ 1616 count = 0; 1617 break; 1618 } 1619 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1620 continue; 1621 found = sdata; 1622 count++; 1623 } 1624 1625 if (count == 1 && ieee80211_powersave_allowed(found)) { 1626 u8 dtimper = found->u.mgd.dtim_period; 1627 1628 timeout = local->dynamic_ps_forced_timeout; 1629 if (timeout < 0) 1630 timeout = 100; 1631 local->hw.conf.dynamic_ps_timeout = timeout; 1632 1633 /* If the TIM IE is invalid, pretend the value is 1 */ 1634 if (!dtimper) 1635 dtimper = 1; 1636 1637 local->hw.conf.ps_dtim_period = dtimper; 1638 local->ps_sdata = found; 1639 } else { 1640 local->ps_sdata = NULL; 1641 } 1642 1643 ieee80211_change_ps(local); 1644 } 1645 1646 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1647 { 1648 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1649 1650 if (sdata->vif.bss_conf.ps != ps_allowed) { 1651 sdata->vif.bss_conf.ps = ps_allowed; 1652 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1653 } 1654 } 1655 1656 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1657 { 1658 struct ieee80211_local *local = 1659 container_of(work, struct ieee80211_local, 1660 dynamic_ps_disable_work); 1661 1662 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1663 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1664 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1665 } 1666 1667 ieee80211_wake_queues_by_reason(&local->hw, 1668 IEEE80211_MAX_QUEUE_MAP, 1669 IEEE80211_QUEUE_STOP_REASON_PS, 1670 false); 1671 } 1672 1673 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1674 { 1675 struct ieee80211_local *local = 1676 container_of(work, struct ieee80211_local, 1677 dynamic_ps_enable_work); 1678 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1679 struct ieee80211_if_managed *ifmgd; 1680 unsigned long flags; 1681 int q; 1682 1683 /* can only happen when PS was just disabled anyway */ 1684 if (!sdata) 1685 return; 1686 1687 ifmgd = &sdata->u.mgd; 1688 1689 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1690 return; 1691 1692 if (local->hw.conf.dynamic_ps_timeout > 0) { 1693 /* don't enter PS if TX frames are pending */ 1694 if (drv_tx_frames_pending(local)) { 1695 mod_timer(&local->dynamic_ps_timer, jiffies + 1696 msecs_to_jiffies( 1697 local->hw.conf.dynamic_ps_timeout)); 1698 return; 1699 } 1700 1701 /* 1702 * transmission can be stopped by others which leads to 1703 * dynamic_ps_timer expiry. Postpone the ps timer if it 1704 * is not the actual idle state. 1705 */ 1706 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1707 for (q = 0; q < local->hw.queues; q++) { 1708 if (local->queue_stop_reasons[q]) { 1709 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1710 flags); 1711 mod_timer(&local->dynamic_ps_timer, jiffies + 1712 msecs_to_jiffies( 1713 local->hw.conf.dynamic_ps_timeout)); 1714 return; 1715 } 1716 } 1717 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1718 } 1719 1720 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1721 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1722 if (drv_tx_frames_pending(local)) { 1723 mod_timer(&local->dynamic_ps_timer, jiffies + 1724 msecs_to_jiffies( 1725 local->hw.conf.dynamic_ps_timeout)); 1726 } else { 1727 ieee80211_send_nullfunc(local, sdata, true); 1728 /* Flush to get the tx status of nullfunc frame */ 1729 ieee80211_flush_queues(local, sdata, false); 1730 } 1731 } 1732 1733 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1734 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1735 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1736 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1737 local->hw.conf.flags |= IEEE80211_CONF_PS; 1738 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1739 } 1740 } 1741 1742 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1743 { 1744 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1745 1746 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1747 } 1748 1749 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1750 { 1751 struct delayed_work *delayed_work = to_delayed_work(work); 1752 struct ieee80211_sub_if_data *sdata = 1753 container_of(delayed_work, struct ieee80211_sub_if_data, 1754 dfs_cac_timer_work); 1755 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1756 1757 mutex_lock(&sdata->local->mtx); 1758 if (sdata->wdev.cac_started) { 1759 ieee80211_vif_release_channel(sdata); 1760 cfg80211_cac_event(sdata->dev, &chandef, 1761 NL80211_RADAR_CAC_FINISHED, 1762 GFP_KERNEL); 1763 } 1764 mutex_unlock(&sdata->local->mtx); 1765 } 1766 1767 static bool 1768 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1769 { 1770 struct ieee80211_local *local = sdata->local; 1771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1772 bool ret = false; 1773 int ac; 1774 1775 if (local->hw.queues < IEEE80211_NUM_ACS) 1776 return false; 1777 1778 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1779 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1780 int non_acm_ac; 1781 unsigned long now = jiffies; 1782 1783 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1784 tx_tspec->admitted_time && 1785 time_after(now, tx_tspec->time_slice_start + HZ)) { 1786 tx_tspec->consumed_tx_time = 0; 1787 tx_tspec->time_slice_start = now; 1788 1789 if (tx_tspec->downgraded) 1790 tx_tspec->action = 1791 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1792 } 1793 1794 switch (tx_tspec->action) { 1795 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1796 /* take the original parameters */ 1797 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1798 sdata_err(sdata, 1799 "failed to set TX queue parameters for queue %d\n", 1800 ac); 1801 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1802 tx_tspec->downgraded = false; 1803 ret = true; 1804 break; 1805 case TX_TSPEC_ACTION_DOWNGRADE: 1806 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1807 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1808 ret = true; 1809 break; 1810 } 1811 /* downgrade next lower non-ACM AC */ 1812 for (non_acm_ac = ac + 1; 1813 non_acm_ac < IEEE80211_NUM_ACS; 1814 non_acm_ac++) 1815 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1816 break; 1817 /* Usually the loop will result in using BK even if it 1818 * requires admission control, but such a configuration 1819 * makes no sense and we have to transmit somehow - the 1820 * AC selection does the same thing. 1821 * If we started out trying to downgrade from BK, then 1822 * the extra condition here might be needed. 1823 */ 1824 if (non_acm_ac >= IEEE80211_NUM_ACS) 1825 non_acm_ac = IEEE80211_AC_BK; 1826 if (drv_conf_tx(local, sdata, ac, 1827 &sdata->tx_conf[non_acm_ac])) 1828 sdata_err(sdata, 1829 "failed to set TX queue parameters for queue %d\n", 1830 ac); 1831 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1832 ret = true; 1833 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1834 tx_tspec->time_slice_start + HZ - now + 1); 1835 break; 1836 case TX_TSPEC_ACTION_NONE: 1837 /* nothing now */ 1838 break; 1839 } 1840 } 1841 1842 return ret; 1843 } 1844 1845 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1846 { 1847 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1848 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1849 } 1850 1851 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1852 { 1853 struct ieee80211_sub_if_data *sdata; 1854 1855 sdata = container_of(work, struct ieee80211_sub_if_data, 1856 u.mgd.tx_tspec_wk.work); 1857 ieee80211_sta_handle_tspec_ac_params(sdata); 1858 } 1859 1860 /* MLME */ 1861 static bool 1862 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1863 struct ieee80211_sub_if_data *sdata, 1864 const u8 *wmm_param, size_t wmm_param_len, 1865 const struct ieee80211_mu_edca_param_set *mu_edca) 1866 { 1867 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1869 size_t left; 1870 int count, ac; 1871 const u8 *pos; 1872 u8 uapsd_queues = 0; 1873 1874 if (!local->ops->conf_tx) 1875 return false; 1876 1877 if (local->hw.queues < IEEE80211_NUM_ACS) 1878 return false; 1879 1880 if (!wmm_param) 1881 return false; 1882 1883 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1884 return false; 1885 1886 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1887 uapsd_queues = ifmgd->uapsd_queues; 1888 1889 count = wmm_param[6] & 0x0f; 1890 if (count == ifmgd->wmm_last_param_set) 1891 return false; 1892 ifmgd->wmm_last_param_set = count; 1893 1894 pos = wmm_param + 8; 1895 left = wmm_param_len - 8; 1896 1897 memset(¶ms, 0, sizeof(params)); 1898 1899 sdata->wmm_acm = 0; 1900 for (; left >= 4; left -= 4, pos += 4) { 1901 int aci = (pos[0] >> 5) & 0x03; 1902 int acm = (pos[0] >> 4) & 0x01; 1903 bool uapsd = false; 1904 1905 switch (aci) { 1906 case 1: /* AC_BK */ 1907 ac = IEEE80211_AC_BK; 1908 if (acm) 1909 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1910 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1911 uapsd = true; 1912 params[ac].mu_edca = !!mu_edca; 1913 if (mu_edca) 1914 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1915 break; 1916 case 2: /* AC_VI */ 1917 ac = IEEE80211_AC_VI; 1918 if (acm) 1919 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1921 uapsd = true; 1922 params[ac].mu_edca = !!mu_edca; 1923 if (mu_edca) 1924 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1925 break; 1926 case 3: /* AC_VO */ 1927 ac = IEEE80211_AC_VO; 1928 if (acm) 1929 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1930 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1931 uapsd = true; 1932 params[ac].mu_edca = !!mu_edca; 1933 if (mu_edca) 1934 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 1935 break; 1936 case 0: /* AC_BE */ 1937 default: 1938 ac = IEEE80211_AC_BE; 1939 if (acm) 1940 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1941 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1942 uapsd = true; 1943 params[ac].mu_edca = !!mu_edca; 1944 if (mu_edca) 1945 params[ac].mu_edca_param_rec = mu_edca->ac_be; 1946 break; 1947 } 1948 1949 params[ac].aifs = pos[0] & 0x0f; 1950 1951 if (params[ac].aifs < 2) { 1952 sdata_info(sdata, 1953 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1954 params[ac].aifs, aci); 1955 params[ac].aifs = 2; 1956 } 1957 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1958 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1959 params[ac].txop = get_unaligned_le16(pos + 2); 1960 params[ac].acm = acm; 1961 params[ac].uapsd = uapsd; 1962 1963 if (params[ac].cw_min == 0 || 1964 params[ac].cw_min > params[ac].cw_max) { 1965 sdata_info(sdata, 1966 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1967 params[ac].cw_min, params[ac].cw_max, aci); 1968 return false; 1969 } 1970 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 1971 } 1972 1973 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1974 mlme_dbg(sdata, 1975 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1976 ac, params[ac].acm, 1977 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1978 params[ac].txop, params[ac].uapsd, 1979 ifmgd->tx_tspec[ac].downgraded); 1980 sdata->tx_conf[ac] = params[ac]; 1981 if (!ifmgd->tx_tspec[ac].downgraded && 1982 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1983 sdata_err(sdata, 1984 "failed to set TX queue parameters for AC %d\n", 1985 ac); 1986 } 1987 1988 /* enable WMM or activate new settings */ 1989 sdata->vif.bss_conf.qos = true; 1990 return true; 1991 } 1992 1993 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1994 { 1995 lockdep_assert_held(&sdata->local->mtx); 1996 1997 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1998 ieee80211_run_deferred_scan(sdata->local); 1999 } 2000 2001 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2002 { 2003 mutex_lock(&sdata->local->mtx); 2004 __ieee80211_stop_poll(sdata); 2005 mutex_unlock(&sdata->local->mtx); 2006 } 2007 2008 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2009 u16 capab, bool erp_valid, u8 erp) 2010 { 2011 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2012 struct ieee80211_supported_band *sband; 2013 u32 changed = 0; 2014 bool use_protection; 2015 bool use_short_preamble; 2016 bool use_short_slot; 2017 2018 sband = ieee80211_get_sband(sdata); 2019 if (!sband) 2020 return changed; 2021 2022 if (erp_valid) { 2023 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2024 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2025 } else { 2026 use_protection = false; 2027 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2028 } 2029 2030 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2031 if (sband->band == NL80211_BAND_5GHZ) 2032 use_short_slot = true; 2033 2034 if (use_protection != bss_conf->use_cts_prot) { 2035 bss_conf->use_cts_prot = use_protection; 2036 changed |= BSS_CHANGED_ERP_CTS_PROT; 2037 } 2038 2039 if (use_short_preamble != bss_conf->use_short_preamble) { 2040 bss_conf->use_short_preamble = use_short_preamble; 2041 changed |= BSS_CHANGED_ERP_PREAMBLE; 2042 } 2043 2044 if (use_short_slot != bss_conf->use_short_slot) { 2045 bss_conf->use_short_slot = use_short_slot; 2046 changed |= BSS_CHANGED_ERP_SLOT; 2047 } 2048 2049 return changed; 2050 } 2051 2052 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2053 struct cfg80211_bss *cbss, 2054 u32 bss_info_changed) 2055 { 2056 struct ieee80211_bss *bss = (void *)cbss->priv; 2057 struct ieee80211_local *local = sdata->local; 2058 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2059 2060 bss_info_changed |= BSS_CHANGED_ASSOC; 2061 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2062 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2063 2064 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2065 beacon_loss_count * bss_conf->beacon_int)); 2066 2067 sdata->u.mgd.associated = cbss; 2068 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2069 2070 ieee80211_check_rate_mask(sdata); 2071 2072 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2073 2074 if (sdata->vif.p2p || 2075 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2076 const struct cfg80211_bss_ies *ies; 2077 2078 rcu_read_lock(); 2079 ies = rcu_dereference(cbss->ies); 2080 if (ies) { 2081 int ret; 2082 2083 ret = cfg80211_get_p2p_attr( 2084 ies->data, ies->len, 2085 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2086 (u8 *) &bss_conf->p2p_noa_attr, 2087 sizeof(bss_conf->p2p_noa_attr)); 2088 if (ret >= 2) { 2089 sdata->u.mgd.p2p_noa_index = 2090 bss_conf->p2p_noa_attr.index; 2091 bss_info_changed |= BSS_CHANGED_P2P_PS; 2092 } 2093 } 2094 rcu_read_unlock(); 2095 } 2096 2097 /* just to be sure */ 2098 ieee80211_stop_poll(sdata); 2099 2100 ieee80211_led_assoc(local, 1); 2101 2102 if (sdata->u.mgd.have_beacon) { 2103 /* 2104 * If the AP is buggy we may get here with no DTIM period 2105 * known, so assume it's 1 which is the only safe assumption 2106 * in that case, although if the TIM IE is broken powersave 2107 * probably just won't work at all. 2108 */ 2109 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2110 bss_conf->beacon_rate = bss->beacon_rate; 2111 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2112 } else { 2113 bss_conf->beacon_rate = NULL; 2114 bss_conf->dtim_period = 0; 2115 } 2116 2117 bss_conf->assoc = 1; 2118 2119 /* Tell the driver to monitor connection quality (if supported) */ 2120 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2121 bss_conf->cqm_rssi_thold) 2122 bss_info_changed |= BSS_CHANGED_CQM; 2123 2124 /* Enable ARP filtering */ 2125 if (bss_conf->arp_addr_cnt) 2126 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2127 2128 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2129 2130 mutex_lock(&local->iflist_mtx); 2131 ieee80211_recalc_ps(local); 2132 mutex_unlock(&local->iflist_mtx); 2133 2134 ieee80211_recalc_smps(sdata); 2135 ieee80211_recalc_ps_vif(sdata); 2136 2137 netif_carrier_on(sdata->dev); 2138 } 2139 2140 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2141 u16 stype, u16 reason, bool tx, 2142 u8 *frame_buf) 2143 { 2144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2145 struct ieee80211_local *local = sdata->local; 2146 u32 changed = 0; 2147 2148 sdata_assert_lock(sdata); 2149 2150 if (WARN_ON_ONCE(tx && !frame_buf)) 2151 return; 2152 2153 if (WARN_ON(!ifmgd->associated)) 2154 return; 2155 2156 ieee80211_stop_poll(sdata); 2157 2158 ifmgd->associated = NULL; 2159 netif_carrier_off(sdata->dev); 2160 2161 /* 2162 * if we want to get out of ps before disassoc (why?) we have 2163 * to do it before sending disassoc, as otherwise the null-packet 2164 * won't be valid. 2165 */ 2166 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2167 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2168 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2169 } 2170 local->ps_sdata = NULL; 2171 2172 /* disable per-vif ps */ 2173 ieee80211_recalc_ps_vif(sdata); 2174 2175 /* make sure ongoing transmission finishes */ 2176 synchronize_net(); 2177 2178 /* 2179 * drop any frame before deauth/disassoc, this can be data or 2180 * management frame. Since we are disconnecting, we should not 2181 * insist sending these frames which can take time and delay 2182 * the disconnection and possible the roaming. 2183 */ 2184 if (tx) 2185 ieee80211_flush_queues(local, sdata, true); 2186 2187 /* deauthenticate/disassociate now */ 2188 if (tx || frame_buf) { 2189 /* 2190 * In multi channel scenarios guarantee that the virtual 2191 * interface is granted immediate airtime to transmit the 2192 * deauthentication frame by calling mgd_prepare_tx, if the 2193 * driver requested so. 2194 */ 2195 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2196 !ifmgd->have_beacon) 2197 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2198 2199 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2200 reason, tx, frame_buf); 2201 } 2202 2203 /* flush out frame - make sure the deauth was actually sent */ 2204 if (tx) 2205 ieee80211_flush_queues(local, sdata, false); 2206 2207 /* clear bssid only after building the needed mgmt frames */ 2208 eth_zero_addr(ifmgd->bssid); 2209 2210 /* remove AP and TDLS peers */ 2211 sta_info_flush(sdata); 2212 2213 /* finally reset all BSS / config parameters */ 2214 changed |= ieee80211_reset_erp_info(sdata); 2215 2216 ieee80211_led_assoc(local, 0); 2217 changed |= BSS_CHANGED_ASSOC; 2218 sdata->vif.bss_conf.assoc = false; 2219 2220 ifmgd->p2p_noa_index = -1; 2221 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2222 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2223 2224 /* on the next assoc, re-program HT/VHT parameters */ 2225 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2226 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2227 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2228 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2229 2230 /* reset MU-MIMO ownership and group data */ 2231 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2232 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2233 memset(sdata->vif.bss_conf.mu_group.position, 0, 2234 sizeof(sdata->vif.bss_conf.mu_group.position)); 2235 changed |= BSS_CHANGED_MU_GROUPS; 2236 sdata->vif.mu_mimo_owner = false; 2237 2238 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2239 2240 del_timer_sync(&local->dynamic_ps_timer); 2241 cancel_work_sync(&local->dynamic_ps_enable_work); 2242 2243 /* Disable ARP filtering */ 2244 if (sdata->vif.bss_conf.arp_addr_cnt) 2245 changed |= BSS_CHANGED_ARP_FILTER; 2246 2247 sdata->vif.bss_conf.qos = false; 2248 changed |= BSS_CHANGED_QOS; 2249 2250 /* The BSSID (not really interesting) and HT changed */ 2251 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2252 ieee80211_bss_info_change_notify(sdata, changed); 2253 2254 /* disassociated - set to defaults now */ 2255 ieee80211_set_wmm_default(sdata, false, false); 2256 2257 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2258 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2259 del_timer_sync(&sdata->u.mgd.timer); 2260 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2261 2262 sdata->vif.bss_conf.dtim_period = 0; 2263 sdata->vif.bss_conf.beacon_rate = NULL; 2264 2265 ifmgd->have_beacon = false; 2266 2267 ifmgd->flags = 0; 2268 mutex_lock(&local->mtx); 2269 ieee80211_vif_release_channel(sdata); 2270 2271 sdata->vif.csa_active = false; 2272 ifmgd->csa_waiting_bcn = false; 2273 ifmgd->csa_ignored_same_chan = false; 2274 if (sdata->csa_block_tx) { 2275 ieee80211_wake_vif_queues(local, sdata, 2276 IEEE80211_QUEUE_STOP_REASON_CSA); 2277 sdata->csa_block_tx = false; 2278 } 2279 mutex_unlock(&local->mtx); 2280 2281 /* existing TX TSPEC sessions no longer exist */ 2282 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2283 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2284 2285 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2286 } 2287 2288 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2289 struct ieee80211_hdr *hdr) 2290 { 2291 /* 2292 * We can postpone the mgd.timer whenever receiving unicast frames 2293 * from AP because we know that the connection is working both ways 2294 * at that time. But multicast frames (and hence also beacons) must 2295 * be ignored here, because we need to trigger the timer during 2296 * data idle periods for sending the periodic probe request to the 2297 * AP we're connected to. 2298 */ 2299 if (is_multicast_ether_addr(hdr->addr1)) 2300 return; 2301 2302 ieee80211_sta_reset_conn_monitor(sdata); 2303 } 2304 2305 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2306 { 2307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2308 struct ieee80211_local *local = sdata->local; 2309 2310 mutex_lock(&local->mtx); 2311 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2312 goto out; 2313 2314 __ieee80211_stop_poll(sdata); 2315 2316 mutex_lock(&local->iflist_mtx); 2317 ieee80211_recalc_ps(local); 2318 mutex_unlock(&local->iflist_mtx); 2319 2320 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2321 goto out; 2322 2323 /* 2324 * We've received a probe response, but are not sure whether 2325 * we have or will be receiving any beacons or data, so let's 2326 * schedule the timers again, just in case. 2327 */ 2328 ieee80211_sta_reset_beacon_monitor(sdata); 2329 2330 mod_timer(&ifmgd->conn_mon_timer, 2331 round_jiffies_up(jiffies + 2332 IEEE80211_CONNECTION_IDLE_TIME)); 2333 out: 2334 mutex_unlock(&local->mtx); 2335 } 2336 2337 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2338 struct ieee80211_hdr *hdr, 2339 u16 tx_time) 2340 { 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2342 u16 tid = ieee80211_get_tid(hdr); 2343 int ac = ieee80211_ac_from_tid(tid); 2344 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2345 unsigned long now = jiffies; 2346 2347 if (likely(!tx_tspec->admitted_time)) 2348 return; 2349 2350 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2351 tx_tspec->consumed_tx_time = 0; 2352 tx_tspec->time_slice_start = now; 2353 2354 if (tx_tspec->downgraded) { 2355 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2356 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2357 } 2358 } 2359 2360 if (tx_tspec->downgraded) 2361 return; 2362 2363 tx_tspec->consumed_tx_time += tx_time; 2364 2365 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2366 tx_tspec->downgraded = true; 2367 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2368 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2369 } 2370 } 2371 2372 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2373 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2374 { 2375 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2376 2377 if (!ieee80211_is_data(hdr->frame_control)) 2378 return; 2379 2380 if (ieee80211_is_nullfunc(hdr->frame_control) && 2381 sdata->u.mgd.probe_send_count > 0) { 2382 if (ack) 2383 ieee80211_sta_reset_conn_monitor(sdata); 2384 else 2385 sdata->u.mgd.nullfunc_failed = true; 2386 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2387 return; 2388 } 2389 2390 if (ack) 2391 ieee80211_sta_reset_conn_monitor(sdata); 2392 } 2393 2394 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2395 const u8 *src, const u8 *dst, 2396 const u8 *ssid, size_t ssid_len, 2397 struct ieee80211_channel *channel) 2398 { 2399 struct sk_buff *skb; 2400 2401 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2402 ssid, ssid_len, NULL, 0, 2403 IEEE80211_PROBE_FLAG_DIRECTED); 2404 if (skb) 2405 ieee80211_tx_skb(sdata, skb); 2406 } 2407 2408 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2409 { 2410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2411 const u8 *ssid; 2412 u8 *dst = ifmgd->associated->bssid; 2413 u8 unicast_limit = max(1, max_probe_tries - 3); 2414 struct sta_info *sta; 2415 2416 /* 2417 * Try sending broadcast probe requests for the last three 2418 * probe requests after the first ones failed since some 2419 * buggy APs only support broadcast probe requests. 2420 */ 2421 if (ifmgd->probe_send_count >= unicast_limit) 2422 dst = NULL; 2423 2424 /* 2425 * When the hardware reports an accurate Tx ACK status, it's 2426 * better to send a nullfunc frame instead of a probe request, 2427 * as it will kick us off the AP quickly if we aren't associated 2428 * anymore. The timeout will be reset if the frame is ACKed by 2429 * the AP. 2430 */ 2431 ifmgd->probe_send_count++; 2432 2433 if (dst) { 2434 mutex_lock(&sdata->local->sta_mtx); 2435 sta = sta_info_get(sdata, dst); 2436 if (!WARN_ON(!sta)) 2437 ieee80211_check_fast_rx(sta); 2438 mutex_unlock(&sdata->local->sta_mtx); 2439 } 2440 2441 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2442 ifmgd->nullfunc_failed = false; 2443 ieee80211_send_nullfunc(sdata->local, sdata, false); 2444 } else { 2445 int ssid_len; 2446 2447 rcu_read_lock(); 2448 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2449 if (WARN_ON_ONCE(ssid == NULL)) 2450 ssid_len = 0; 2451 else 2452 ssid_len = ssid[1]; 2453 2454 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2455 ssid + 2, ssid_len, 2456 ifmgd->associated->channel); 2457 rcu_read_unlock(); 2458 } 2459 2460 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2461 run_again(sdata, ifmgd->probe_timeout); 2462 } 2463 2464 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2465 bool beacon) 2466 { 2467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2468 bool already = false; 2469 2470 if (!ieee80211_sdata_running(sdata)) 2471 return; 2472 2473 sdata_lock(sdata); 2474 2475 if (!ifmgd->associated) 2476 goto out; 2477 2478 mutex_lock(&sdata->local->mtx); 2479 2480 if (sdata->local->tmp_channel || sdata->local->scanning) { 2481 mutex_unlock(&sdata->local->mtx); 2482 goto out; 2483 } 2484 2485 if (beacon) { 2486 mlme_dbg_ratelimited(sdata, 2487 "detected beacon loss from AP (missed %d beacons) - probing\n", 2488 beacon_loss_count); 2489 2490 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2491 } 2492 2493 /* 2494 * The driver/our work has already reported this event or the 2495 * connection monitoring has kicked in and we have already sent 2496 * a probe request. Or maybe the AP died and the driver keeps 2497 * reporting until we disassociate... 2498 * 2499 * In either case we have to ignore the current call to this 2500 * function (except for setting the correct probe reason bit) 2501 * because otherwise we would reset the timer every time and 2502 * never check whether we received a probe response! 2503 */ 2504 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2505 already = true; 2506 2507 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2508 2509 mutex_unlock(&sdata->local->mtx); 2510 2511 if (already) 2512 goto out; 2513 2514 mutex_lock(&sdata->local->iflist_mtx); 2515 ieee80211_recalc_ps(sdata->local); 2516 mutex_unlock(&sdata->local->iflist_mtx); 2517 2518 ifmgd->probe_send_count = 0; 2519 ieee80211_mgd_probe_ap_send(sdata); 2520 out: 2521 sdata_unlock(sdata); 2522 } 2523 2524 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2525 struct ieee80211_vif *vif) 2526 { 2527 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2529 struct cfg80211_bss *cbss; 2530 struct sk_buff *skb; 2531 const u8 *ssid; 2532 int ssid_len; 2533 2534 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2535 return NULL; 2536 2537 sdata_assert_lock(sdata); 2538 2539 if (ifmgd->associated) 2540 cbss = ifmgd->associated; 2541 else if (ifmgd->auth_data) 2542 cbss = ifmgd->auth_data->bss; 2543 else if (ifmgd->assoc_data) 2544 cbss = ifmgd->assoc_data->bss; 2545 else 2546 return NULL; 2547 2548 rcu_read_lock(); 2549 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2550 if (WARN_ON_ONCE(ssid == NULL)) 2551 ssid_len = 0; 2552 else 2553 ssid_len = ssid[1]; 2554 2555 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2556 (u32) -1, cbss->channel, 2557 ssid + 2, ssid_len, 2558 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2559 rcu_read_unlock(); 2560 2561 return skb; 2562 } 2563 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2564 2565 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2566 const u8 *buf, size_t len, bool tx, 2567 u16 reason) 2568 { 2569 struct ieee80211_event event = { 2570 .type = MLME_EVENT, 2571 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2572 .u.mlme.reason = reason, 2573 }; 2574 2575 if (tx) 2576 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2577 else 2578 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2579 2580 drv_event_callback(sdata->local, sdata, &event); 2581 } 2582 2583 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2584 { 2585 struct ieee80211_local *local = sdata->local; 2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2587 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2588 bool tx; 2589 2590 sdata_lock(sdata); 2591 if (!ifmgd->associated) { 2592 sdata_unlock(sdata); 2593 return; 2594 } 2595 2596 tx = !sdata->csa_block_tx; 2597 2598 /* AP is probably out of range (or not reachable for another reason) so 2599 * remove the bss struct for that AP. 2600 */ 2601 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2602 2603 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2604 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2605 tx, frame_buf); 2606 mutex_lock(&local->mtx); 2607 sdata->vif.csa_active = false; 2608 ifmgd->csa_waiting_bcn = false; 2609 if (sdata->csa_block_tx) { 2610 ieee80211_wake_vif_queues(local, sdata, 2611 IEEE80211_QUEUE_STOP_REASON_CSA); 2612 sdata->csa_block_tx = false; 2613 } 2614 mutex_unlock(&local->mtx); 2615 2616 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2617 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2618 2619 sdata_unlock(sdata); 2620 } 2621 2622 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2623 { 2624 struct ieee80211_sub_if_data *sdata = 2625 container_of(work, struct ieee80211_sub_if_data, 2626 u.mgd.beacon_connection_loss_work); 2627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2628 2629 if (ifmgd->associated) 2630 ifmgd->beacon_loss_count++; 2631 2632 if (ifmgd->connection_loss) { 2633 sdata_info(sdata, "Connection to AP %pM lost\n", 2634 ifmgd->bssid); 2635 __ieee80211_disconnect(sdata); 2636 } else { 2637 ieee80211_mgd_probe_ap(sdata, true); 2638 } 2639 } 2640 2641 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2642 { 2643 struct ieee80211_sub_if_data *sdata = 2644 container_of(work, struct ieee80211_sub_if_data, 2645 u.mgd.csa_connection_drop_work); 2646 2647 __ieee80211_disconnect(sdata); 2648 } 2649 2650 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2651 { 2652 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2653 struct ieee80211_hw *hw = &sdata->local->hw; 2654 2655 trace_api_beacon_loss(sdata); 2656 2657 sdata->u.mgd.connection_loss = false; 2658 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2659 } 2660 EXPORT_SYMBOL(ieee80211_beacon_loss); 2661 2662 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2663 { 2664 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2665 struct ieee80211_hw *hw = &sdata->local->hw; 2666 2667 trace_api_connection_loss(sdata); 2668 2669 sdata->u.mgd.connection_loss = true; 2670 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2671 } 2672 EXPORT_SYMBOL(ieee80211_connection_loss); 2673 2674 2675 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2676 bool assoc) 2677 { 2678 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2679 2680 sdata_assert_lock(sdata); 2681 2682 if (!assoc) { 2683 /* 2684 * we are not authenticated yet, the only timer that could be 2685 * running is the timeout for the authentication response which 2686 * which is not relevant anymore. 2687 */ 2688 del_timer_sync(&sdata->u.mgd.timer); 2689 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2690 2691 eth_zero_addr(sdata->u.mgd.bssid); 2692 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2693 sdata->u.mgd.flags = 0; 2694 mutex_lock(&sdata->local->mtx); 2695 ieee80211_vif_release_channel(sdata); 2696 mutex_unlock(&sdata->local->mtx); 2697 } 2698 2699 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2700 kfree(auth_data); 2701 sdata->u.mgd.auth_data = NULL; 2702 } 2703 2704 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2705 bool assoc, bool abandon) 2706 { 2707 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2708 2709 sdata_assert_lock(sdata); 2710 2711 if (!assoc) { 2712 /* 2713 * we are not associated yet, the only timer that could be 2714 * running is the timeout for the association response which 2715 * which is not relevant anymore. 2716 */ 2717 del_timer_sync(&sdata->u.mgd.timer); 2718 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2719 2720 eth_zero_addr(sdata->u.mgd.bssid); 2721 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2722 sdata->u.mgd.flags = 0; 2723 sdata->vif.mu_mimo_owner = false; 2724 2725 mutex_lock(&sdata->local->mtx); 2726 ieee80211_vif_release_channel(sdata); 2727 mutex_unlock(&sdata->local->mtx); 2728 2729 if (abandon) 2730 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2731 } 2732 2733 kfree(assoc_data); 2734 sdata->u.mgd.assoc_data = NULL; 2735 } 2736 2737 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2738 struct ieee80211_mgmt *mgmt, size_t len) 2739 { 2740 struct ieee80211_local *local = sdata->local; 2741 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2742 u8 *pos; 2743 struct ieee802_11_elems elems; 2744 u32 tx_flags = 0; 2745 2746 pos = mgmt->u.auth.variable; 2747 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2748 if (!elems.challenge) 2749 return; 2750 auth_data->expected_transaction = 4; 2751 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2752 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2753 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2754 IEEE80211_TX_INTFL_MLME_CONN_TX; 2755 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2756 elems.challenge - 2, elems.challenge_len + 2, 2757 auth_data->bss->bssid, auth_data->bss->bssid, 2758 auth_data->key, auth_data->key_len, 2759 auth_data->key_idx, tx_flags); 2760 } 2761 2762 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2763 struct ieee80211_mgmt *mgmt, size_t len) 2764 { 2765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2766 u8 bssid[ETH_ALEN]; 2767 u16 auth_alg, auth_transaction, status_code; 2768 struct sta_info *sta; 2769 struct ieee80211_event event = { 2770 .type = MLME_EVENT, 2771 .u.mlme.data = AUTH_EVENT, 2772 }; 2773 2774 sdata_assert_lock(sdata); 2775 2776 if (len < 24 + 6) 2777 return; 2778 2779 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2780 return; 2781 2782 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2783 2784 if (!ether_addr_equal(bssid, mgmt->bssid)) 2785 return; 2786 2787 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2788 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2789 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2790 2791 if (auth_alg != ifmgd->auth_data->algorithm || 2792 auth_transaction != ifmgd->auth_data->expected_transaction) { 2793 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2794 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2795 auth_transaction, 2796 ifmgd->auth_data->expected_transaction); 2797 return; 2798 } 2799 2800 if (status_code != WLAN_STATUS_SUCCESS) { 2801 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2802 mgmt->sa, status_code); 2803 ieee80211_destroy_auth_data(sdata, false); 2804 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2805 event.u.mlme.status = MLME_DENIED; 2806 event.u.mlme.reason = status_code; 2807 drv_event_callback(sdata->local, sdata, &event); 2808 return; 2809 } 2810 2811 switch (ifmgd->auth_data->algorithm) { 2812 case WLAN_AUTH_OPEN: 2813 case WLAN_AUTH_LEAP: 2814 case WLAN_AUTH_FT: 2815 case WLAN_AUTH_SAE: 2816 case WLAN_AUTH_FILS_SK: 2817 case WLAN_AUTH_FILS_SK_PFS: 2818 case WLAN_AUTH_FILS_PK: 2819 break; 2820 case WLAN_AUTH_SHARED_KEY: 2821 if (ifmgd->auth_data->expected_transaction != 4) { 2822 ieee80211_auth_challenge(sdata, mgmt, len); 2823 /* need another frame */ 2824 return; 2825 } 2826 break; 2827 default: 2828 WARN_ONCE(1, "invalid auth alg %d", 2829 ifmgd->auth_data->algorithm); 2830 return; 2831 } 2832 2833 event.u.mlme.status = MLME_SUCCESS; 2834 drv_event_callback(sdata->local, sdata, &event); 2835 sdata_info(sdata, "authenticated\n"); 2836 ifmgd->auth_data->done = true; 2837 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2838 ifmgd->auth_data->timeout_started = true; 2839 run_again(sdata, ifmgd->auth_data->timeout); 2840 2841 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2842 ifmgd->auth_data->expected_transaction != 2) { 2843 /* 2844 * Report auth frame to user space for processing since another 2845 * round of Authentication frames is still needed. 2846 */ 2847 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2848 return; 2849 } 2850 2851 /* move station state to auth */ 2852 mutex_lock(&sdata->local->sta_mtx); 2853 sta = sta_info_get(sdata, bssid); 2854 if (!sta) { 2855 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2856 goto out_err; 2857 } 2858 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2859 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2860 goto out_err; 2861 } 2862 mutex_unlock(&sdata->local->sta_mtx); 2863 2864 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2865 return; 2866 out_err: 2867 mutex_unlock(&sdata->local->sta_mtx); 2868 /* ignore frame -- wait for timeout */ 2869 } 2870 2871 #define case_WLAN(type) \ 2872 case WLAN_REASON_##type: return #type 2873 2874 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2875 { 2876 switch (reason_code) { 2877 case_WLAN(UNSPECIFIED); 2878 case_WLAN(PREV_AUTH_NOT_VALID); 2879 case_WLAN(DEAUTH_LEAVING); 2880 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2881 case_WLAN(DISASSOC_AP_BUSY); 2882 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2883 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2884 case_WLAN(DISASSOC_STA_HAS_LEFT); 2885 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2886 case_WLAN(DISASSOC_BAD_POWER); 2887 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2888 case_WLAN(INVALID_IE); 2889 case_WLAN(MIC_FAILURE); 2890 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2891 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2892 case_WLAN(IE_DIFFERENT); 2893 case_WLAN(INVALID_GROUP_CIPHER); 2894 case_WLAN(INVALID_PAIRWISE_CIPHER); 2895 case_WLAN(INVALID_AKMP); 2896 case_WLAN(UNSUPP_RSN_VERSION); 2897 case_WLAN(INVALID_RSN_IE_CAP); 2898 case_WLAN(IEEE8021X_FAILED); 2899 case_WLAN(CIPHER_SUITE_REJECTED); 2900 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2901 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2902 case_WLAN(DISASSOC_LOW_ACK); 2903 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2904 case_WLAN(QSTA_LEAVE_QBSS); 2905 case_WLAN(QSTA_NOT_USE); 2906 case_WLAN(QSTA_REQUIRE_SETUP); 2907 case_WLAN(QSTA_TIMEOUT); 2908 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2909 case_WLAN(MESH_PEER_CANCELED); 2910 case_WLAN(MESH_MAX_PEERS); 2911 case_WLAN(MESH_CONFIG); 2912 case_WLAN(MESH_CLOSE); 2913 case_WLAN(MESH_MAX_RETRIES); 2914 case_WLAN(MESH_CONFIRM_TIMEOUT); 2915 case_WLAN(MESH_INVALID_GTK); 2916 case_WLAN(MESH_INCONSISTENT_PARAM); 2917 case_WLAN(MESH_INVALID_SECURITY); 2918 case_WLAN(MESH_PATH_ERROR); 2919 case_WLAN(MESH_PATH_NOFORWARD); 2920 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2921 case_WLAN(MAC_EXISTS_IN_MBSS); 2922 case_WLAN(MESH_CHAN_REGULATORY); 2923 case_WLAN(MESH_CHAN); 2924 default: return "<unknown>"; 2925 } 2926 } 2927 2928 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2929 struct ieee80211_mgmt *mgmt, size_t len) 2930 { 2931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2932 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2933 2934 sdata_assert_lock(sdata); 2935 2936 if (len < 24 + 2) 2937 return; 2938 2939 if (ifmgd->associated && 2940 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2941 const u8 *bssid = ifmgd->associated->bssid; 2942 2943 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2944 bssid, reason_code, 2945 ieee80211_get_reason_code_string(reason_code)); 2946 2947 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2948 2949 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2950 reason_code); 2951 return; 2952 } 2953 2954 if (ifmgd->assoc_data && 2955 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2956 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2957 2958 sdata_info(sdata, 2959 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2960 bssid, reason_code, 2961 ieee80211_get_reason_code_string(reason_code)); 2962 2963 ieee80211_destroy_assoc_data(sdata, false, true); 2964 2965 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2966 return; 2967 } 2968 } 2969 2970 2971 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2972 struct ieee80211_mgmt *mgmt, size_t len) 2973 { 2974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2975 u16 reason_code; 2976 2977 sdata_assert_lock(sdata); 2978 2979 if (len < 24 + 2) 2980 return; 2981 2982 if (!ifmgd->associated || 2983 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2984 return; 2985 2986 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2987 2988 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2989 mgmt->sa, reason_code, 2990 ieee80211_get_reason_code_string(reason_code)); 2991 2992 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2993 2994 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2995 } 2996 2997 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2998 u8 *supp_rates, unsigned int supp_rates_len, 2999 u32 *rates, u32 *basic_rates, 3000 bool *have_higher_than_11mbit, 3001 int *min_rate, int *min_rate_index, 3002 int shift) 3003 { 3004 int i, j; 3005 3006 for (i = 0; i < supp_rates_len; i++) { 3007 int rate = supp_rates[i] & 0x7f; 3008 bool is_basic = !!(supp_rates[i] & 0x80); 3009 3010 if ((rate * 5 * (1 << shift)) > 110) 3011 *have_higher_than_11mbit = true; 3012 3013 /* 3014 * Skip HT and VHT BSS membership selectors since they're not 3015 * rates. 3016 * 3017 * Note: Even though the membership selector and the basic 3018 * rate flag share the same bit, they are not exactly 3019 * the same. 3020 */ 3021 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3022 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3023 continue; 3024 3025 for (j = 0; j < sband->n_bitrates; j++) { 3026 struct ieee80211_rate *br; 3027 int brate; 3028 3029 br = &sband->bitrates[j]; 3030 3031 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3032 if (brate == rate) { 3033 *rates |= BIT(j); 3034 if (is_basic) 3035 *basic_rates |= BIT(j); 3036 if ((rate * 5) < *min_rate) { 3037 *min_rate = rate * 5; 3038 *min_rate_index = j; 3039 } 3040 break; 3041 } 3042 } 3043 } 3044 } 3045 3046 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3047 struct cfg80211_bss *cbss, 3048 struct ieee80211_mgmt *mgmt, size_t len) 3049 { 3050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3051 struct ieee80211_local *local = sdata->local; 3052 struct ieee80211_supported_band *sband; 3053 struct sta_info *sta; 3054 u8 *pos; 3055 u16 capab_info, aid; 3056 struct ieee802_11_elems elems; 3057 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3058 const struct cfg80211_bss_ies *bss_ies = NULL; 3059 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3060 u32 changed = 0; 3061 int err; 3062 bool ret; 3063 3064 /* AssocResp and ReassocResp have identical structure */ 3065 3066 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3067 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3068 3069 /* 3070 * The 5 MSB of the AID field are reserved 3071 * (802.11-2016 9.4.1.8 AID field) 3072 */ 3073 aid &= 0x7ff; 3074 3075 ifmgd->broken_ap = false; 3076 3077 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3078 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3079 aid); 3080 aid = 0; 3081 ifmgd->broken_ap = true; 3082 } 3083 3084 pos = mgmt->u.assoc_resp.variable; 3085 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3086 3087 if (!elems.supp_rates) { 3088 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3089 return false; 3090 } 3091 3092 ifmgd->aid = aid; 3093 ifmgd->tdls_chan_switch_prohibited = 3094 elems.ext_capab && elems.ext_capab_len >= 5 && 3095 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3096 3097 /* 3098 * Some APs are erroneously not including some information in their 3099 * (re)association response frames. Try to recover by using the data 3100 * from the beacon or probe response. This seems to afflict mobile 3101 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3102 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3103 */ 3104 if ((assoc_data->wmm && !elems.wmm_param) || 3105 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3106 (!elems.ht_cap_elem || !elems.ht_operation)) || 3107 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3108 (!elems.vht_cap_elem || !elems.vht_operation))) { 3109 const struct cfg80211_bss_ies *ies; 3110 struct ieee802_11_elems bss_elems; 3111 3112 rcu_read_lock(); 3113 ies = rcu_dereference(cbss->ies); 3114 if (ies) 3115 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3116 GFP_ATOMIC); 3117 rcu_read_unlock(); 3118 if (!bss_ies) 3119 return false; 3120 3121 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3122 false, &bss_elems); 3123 if (assoc_data->wmm && 3124 !elems.wmm_param && bss_elems.wmm_param) { 3125 elems.wmm_param = bss_elems.wmm_param; 3126 sdata_info(sdata, 3127 "AP bug: WMM param missing from AssocResp\n"); 3128 } 3129 3130 /* 3131 * Also check if we requested HT/VHT, otherwise the AP doesn't 3132 * have to include the IEs in the (re)association response. 3133 */ 3134 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3135 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3136 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3137 sdata_info(sdata, 3138 "AP bug: HT capability missing from AssocResp\n"); 3139 } 3140 if (!elems.ht_operation && bss_elems.ht_operation && 3141 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3142 elems.ht_operation = bss_elems.ht_operation; 3143 sdata_info(sdata, 3144 "AP bug: HT operation missing from AssocResp\n"); 3145 } 3146 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3147 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3148 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3149 sdata_info(sdata, 3150 "AP bug: VHT capa missing from AssocResp\n"); 3151 } 3152 if (!elems.vht_operation && bss_elems.vht_operation && 3153 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3154 elems.vht_operation = bss_elems.vht_operation; 3155 sdata_info(sdata, 3156 "AP bug: VHT operation missing from AssocResp\n"); 3157 } 3158 } 3159 3160 /* 3161 * We previously checked these in the beacon/probe response, so 3162 * they should be present here. This is just a safety net. 3163 */ 3164 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3165 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3166 sdata_info(sdata, 3167 "HT AP is missing WMM params or HT capability/operation\n"); 3168 ret = false; 3169 goto out; 3170 } 3171 3172 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3173 (!elems.vht_cap_elem || !elems.vht_operation)) { 3174 sdata_info(sdata, 3175 "VHT AP is missing VHT capability/operation\n"); 3176 ret = false; 3177 goto out; 3178 } 3179 3180 mutex_lock(&sdata->local->sta_mtx); 3181 /* 3182 * station info was already allocated and inserted before 3183 * the association and should be available to us 3184 */ 3185 sta = sta_info_get(sdata, cbss->bssid); 3186 if (WARN_ON(!sta)) { 3187 mutex_unlock(&sdata->local->sta_mtx); 3188 ret = false; 3189 goto out; 3190 } 3191 3192 sband = ieee80211_get_sband(sdata); 3193 if (!sband) { 3194 mutex_unlock(&sdata->local->sta_mtx); 3195 ret = false; 3196 goto out; 3197 } 3198 3199 /* 3200 * If AP doesn't support HT, or it doesn't have HE mandatory IEs, mark 3201 * HE as disabled. If on the 5GHz band, make sure it supports VHT. 3202 */ 3203 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 3204 (sband->band == NL80211_BAND_5GHZ && 3205 ifmgd->flags & IEEE80211_STA_DISABLE_VHT) || 3206 (!elems.he_cap && !elems.he_operation)) 3207 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 3208 3209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3210 (!elems.he_cap || !elems.he_operation)) { 3211 mutex_unlock(&sdata->local->sta_mtx); 3212 sdata_info(sdata, 3213 "HE AP is missing HE capability/operation\n"); 3214 ret = false; 3215 goto out; 3216 } 3217 3218 /* Set up internal HT/VHT capabilities */ 3219 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3220 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3221 elems.ht_cap_elem, sta); 3222 3223 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3224 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3225 elems.vht_cap_elem, sta); 3226 3227 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3228 elems.he_cap) { 3229 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3230 elems.he_cap, 3231 elems.he_cap_len, 3232 sta); 3233 3234 bss_conf->he_support = sta->sta.he_cap.has_he; 3235 } else { 3236 bss_conf->he_support = false; 3237 } 3238 3239 if (bss_conf->he_support) { 3240 u32 he_oper_params = 3241 le32_to_cpu(elems.he_operation->he_oper_params); 3242 3243 bss_conf->bss_color = he_oper_params & 3244 IEEE80211_HE_OPERATION_BSS_COLOR_MASK; 3245 bss_conf->htc_trig_based_pkt_ext = 3246 (he_oper_params & 3247 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK) << 3248 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_OFFSET; 3249 bss_conf->frame_time_rts_th = 3250 (he_oper_params & 3251 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK) << 3252 IEEE80211_HE_OPERATION_RTS_THRESHOLD_OFFSET; 3253 3254 bss_conf->multi_sta_back_32bit = 3255 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3256 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3257 3258 bss_conf->ack_enabled = 3259 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3260 IEEE80211_HE_MAC_CAP2_ACK_EN; 3261 3262 bss_conf->uora_exists = !!elems.uora_element; 3263 if (elems.uora_element) 3264 bss_conf->uora_ocw_range = elems.uora_element[0]; 3265 3266 /* TODO: OPEN: what happens if BSS color disable is set? */ 3267 } 3268 3269 /* 3270 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3271 * in their association response, so ignore that data for our own 3272 * configuration. If it changed since the last beacon, we'll get the 3273 * next beacon and update then. 3274 */ 3275 3276 /* 3277 * If an operating mode notification IE is present, override the 3278 * NSS calculation (that would be done in rate_control_rate_init()) 3279 * and use the # of streams from that element. 3280 */ 3281 if (elems.opmode_notif && 3282 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3283 u8 nss; 3284 3285 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3286 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3287 nss += 1; 3288 sta->sta.rx_nss = nss; 3289 } 3290 3291 rate_control_rate_init(sta); 3292 3293 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3294 set_sta_flag(sta, WLAN_STA_MFP); 3295 sta->sta.mfp = true; 3296 } else { 3297 sta->sta.mfp = false; 3298 } 3299 3300 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3301 3302 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3303 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3304 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3305 if (err) { 3306 sdata_info(sdata, 3307 "failed to move station %pM to desired state\n", 3308 sta->sta.addr); 3309 WARN_ON(__sta_info_destroy(sta)); 3310 mutex_unlock(&sdata->local->sta_mtx); 3311 ret = false; 3312 goto out; 3313 } 3314 3315 mutex_unlock(&sdata->local->sta_mtx); 3316 3317 /* 3318 * Always handle WMM once after association regardless 3319 * of the first value the AP uses. Setting -1 here has 3320 * that effect because the AP values is an unsigned 3321 * 4-bit value. 3322 */ 3323 ifmgd->wmm_last_param_set = -1; 3324 3325 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3326 ieee80211_set_wmm_default(sdata, false, false); 3327 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3328 elems.wmm_param_len, 3329 elems.mu_edca_param_set)) { 3330 /* still enable QoS since we might have HT/VHT */ 3331 ieee80211_set_wmm_default(sdata, false, true); 3332 /* set the disable-WMM flag in this case to disable 3333 * tracking WMM parameter changes in the beacon if 3334 * the parameters weren't actually valid. Doing so 3335 * avoids changing parameters very strangely when 3336 * the AP is going back and forth between valid and 3337 * invalid parameters. 3338 */ 3339 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3340 } 3341 changed |= BSS_CHANGED_QOS; 3342 3343 if (elems.max_idle_period_ie) { 3344 bss_conf->max_idle_period = 3345 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3346 bss_conf->protected_keep_alive = 3347 !!(elems.max_idle_period_ie->idle_options & 3348 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3349 changed |= BSS_CHANGED_KEEP_ALIVE; 3350 } else { 3351 bss_conf->max_idle_period = 0; 3352 bss_conf->protected_keep_alive = false; 3353 } 3354 3355 /* set AID and assoc capability, 3356 * ieee80211_set_associated() will tell the driver */ 3357 bss_conf->aid = aid; 3358 bss_conf->assoc_capability = capab_info; 3359 ieee80211_set_associated(sdata, cbss, changed); 3360 3361 /* 3362 * If we're using 4-addr mode, let the AP know that we're 3363 * doing so, so that it can create the STA VLAN on its side 3364 */ 3365 if (ifmgd->use_4addr) 3366 ieee80211_send_4addr_nullfunc(local, sdata); 3367 3368 /* 3369 * Start timer to probe the connection to the AP now. 3370 * Also start the timer that will detect beacon loss. 3371 */ 3372 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3373 ieee80211_sta_reset_beacon_monitor(sdata); 3374 3375 ret = true; 3376 out: 3377 kfree(bss_ies); 3378 return ret; 3379 } 3380 3381 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3382 struct ieee80211_mgmt *mgmt, 3383 size_t len) 3384 { 3385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3386 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3387 u16 capab_info, status_code, aid; 3388 struct ieee802_11_elems elems; 3389 int ac, uapsd_queues = -1; 3390 u8 *pos; 3391 bool reassoc; 3392 struct cfg80211_bss *bss; 3393 struct ieee80211_event event = { 3394 .type = MLME_EVENT, 3395 .u.mlme.data = ASSOC_EVENT, 3396 }; 3397 3398 sdata_assert_lock(sdata); 3399 3400 if (!assoc_data) 3401 return; 3402 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3403 return; 3404 3405 /* 3406 * AssocResp and ReassocResp have identical structure, so process both 3407 * of them in this function. 3408 */ 3409 3410 if (len < 24 + 6) 3411 return; 3412 3413 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3414 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3415 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3416 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3417 3418 sdata_info(sdata, 3419 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3420 reassoc ? "Rea" : "A", mgmt->sa, 3421 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3422 3423 if (assoc_data->fils_kek_len && 3424 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3425 return; 3426 3427 pos = mgmt->u.assoc_resp.variable; 3428 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3429 3430 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3431 elems.timeout_int && 3432 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3433 u32 tu, ms; 3434 tu = le32_to_cpu(elems.timeout_int->value); 3435 ms = tu * 1024 / 1000; 3436 sdata_info(sdata, 3437 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3438 mgmt->sa, tu, ms); 3439 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3440 assoc_data->timeout_started = true; 3441 if (ms > IEEE80211_ASSOC_TIMEOUT) 3442 run_again(sdata, assoc_data->timeout); 3443 return; 3444 } 3445 3446 bss = assoc_data->bss; 3447 3448 if (status_code != WLAN_STATUS_SUCCESS) { 3449 sdata_info(sdata, "%pM denied association (code=%d)\n", 3450 mgmt->sa, status_code); 3451 ieee80211_destroy_assoc_data(sdata, false, false); 3452 event.u.mlme.status = MLME_DENIED; 3453 event.u.mlme.reason = status_code; 3454 drv_event_callback(sdata->local, sdata, &event); 3455 } else { 3456 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3457 /* oops -- internal error -- send timeout for now */ 3458 ieee80211_destroy_assoc_data(sdata, false, false); 3459 cfg80211_assoc_timeout(sdata->dev, bss); 3460 return; 3461 } 3462 event.u.mlme.status = MLME_SUCCESS; 3463 drv_event_callback(sdata->local, sdata, &event); 3464 sdata_info(sdata, "associated\n"); 3465 3466 /* 3467 * destroy assoc_data afterwards, as otherwise an idle 3468 * recalc after assoc_data is NULL but before associated 3469 * is set can cause the interface to go idle 3470 */ 3471 ieee80211_destroy_assoc_data(sdata, true, false); 3472 3473 /* get uapsd queues configuration */ 3474 uapsd_queues = 0; 3475 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3476 if (sdata->tx_conf[ac].uapsd) 3477 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3478 } 3479 3480 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3481 } 3482 3483 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3484 struct ieee80211_mgmt *mgmt, size_t len, 3485 struct ieee80211_rx_status *rx_status, 3486 struct ieee802_11_elems *elems) 3487 { 3488 struct ieee80211_local *local = sdata->local; 3489 struct ieee80211_bss *bss; 3490 struct ieee80211_channel *channel; 3491 3492 sdata_assert_lock(sdata); 3493 3494 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3495 if (!channel) 3496 return; 3497 3498 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3499 channel); 3500 if (bss) { 3501 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3502 ieee80211_rx_bss_put(local, bss); 3503 } 3504 } 3505 3506 3507 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3508 struct sk_buff *skb) 3509 { 3510 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3511 struct ieee80211_if_managed *ifmgd; 3512 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3513 size_t baselen, len = skb->len; 3514 struct ieee802_11_elems elems; 3515 3516 ifmgd = &sdata->u.mgd; 3517 3518 sdata_assert_lock(sdata); 3519 3520 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3521 return; /* ignore ProbeResp to foreign address */ 3522 3523 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3524 if (baselen > len) 3525 return; 3526 3527 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3528 false, &elems); 3529 3530 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3531 3532 if (ifmgd->associated && 3533 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3534 ieee80211_reset_ap_probe(sdata); 3535 } 3536 3537 /* 3538 * This is the canonical list of information elements we care about, 3539 * the filter code also gives us all changes to the Microsoft OUI 3540 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3541 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3542 * changes to requested client power. 3543 * 3544 * We implement beacon filtering in software since that means we can 3545 * avoid processing the frame here and in cfg80211, and userspace 3546 * will not be able to tell whether the hardware supports it or not. 3547 * 3548 * XXX: This list needs to be dynamic -- userspace needs to be able to 3549 * add items it requires. It also needs to be able to tell us to 3550 * look out for other vendor IEs. 3551 */ 3552 static const u64 care_about_ies = 3553 (1ULL << WLAN_EID_COUNTRY) | 3554 (1ULL << WLAN_EID_ERP_INFO) | 3555 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3556 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3557 (1ULL << WLAN_EID_HT_CAPABILITY) | 3558 (1ULL << WLAN_EID_HT_OPERATION) | 3559 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3560 3561 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3562 struct ieee80211_if_managed *ifmgd, 3563 struct ieee80211_bss_conf *bss_conf, 3564 struct ieee80211_local *local, 3565 struct ieee80211_rx_status *rx_status) 3566 { 3567 /* Track average RSSI from the Beacon frames of the current AP */ 3568 3569 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3570 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3571 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3572 ifmgd->last_cqm_event_signal = 0; 3573 ifmgd->count_beacon_signal = 1; 3574 ifmgd->last_ave_beacon_signal = 0; 3575 } else { 3576 ifmgd->count_beacon_signal++; 3577 } 3578 3579 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3580 3581 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3582 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3583 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3584 int last_sig = ifmgd->last_ave_beacon_signal; 3585 struct ieee80211_event event = { 3586 .type = RSSI_EVENT, 3587 }; 3588 3589 /* 3590 * if signal crosses either of the boundaries, invoke callback 3591 * with appropriate parameters 3592 */ 3593 if (sig > ifmgd->rssi_max_thold && 3594 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3595 ifmgd->last_ave_beacon_signal = sig; 3596 event.u.rssi.data = RSSI_EVENT_HIGH; 3597 drv_event_callback(local, sdata, &event); 3598 } else if (sig < ifmgd->rssi_min_thold && 3599 (last_sig >= ifmgd->rssi_max_thold || 3600 last_sig == 0)) { 3601 ifmgd->last_ave_beacon_signal = sig; 3602 event.u.rssi.data = RSSI_EVENT_LOW; 3603 drv_event_callback(local, sdata, &event); 3604 } 3605 } 3606 3607 if (bss_conf->cqm_rssi_thold && 3608 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3609 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3610 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3611 int last_event = ifmgd->last_cqm_event_signal; 3612 int thold = bss_conf->cqm_rssi_thold; 3613 int hyst = bss_conf->cqm_rssi_hyst; 3614 3615 if (sig < thold && 3616 (last_event == 0 || sig < last_event - hyst)) { 3617 ifmgd->last_cqm_event_signal = sig; 3618 ieee80211_cqm_rssi_notify( 3619 &sdata->vif, 3620 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3621 sig, GFP_KERNEL); 3622 } else if (sig > thold && 3623 (last_event == 0 || sig > last_event + hyst)) { 3624 ifmgd->last_cqm_event_signal = sig; 3625 ieee80211_cqm_rssi_notify( 3626 &sdata->vif, 3627 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3628 sig, GFP_KERNEL); 3629 } 3630 } 3631 3632 if (bss_conf->cqm_rssi_low && 3633 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3634 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3635 int last_event = ifmgd->last_cqm_event_signal; 3636 int low = bss_conf->cqm_rssi_low; 3637 int high = bss_conf->cqm_rssi_high; 3638 3639 if (sig < low && 3640 (last_event == 0 || last_event >= low)) { 3641 ifmgd->last_cqm_event_signal = sig; 3642 ieee80211_cqm_rssi_notify( 3643 &sdata->vif, 3644 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3645 sig, GFP_KERNEL); 3646 } else if (sig > high && 3647 (last_event == 0 || last_event <= high)) { 3648 ifmgd->last_cqm_event_signal = sig; 3649 ieee80211_cqm_rssi_notify( 3650 &sdata->vif, 3651 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3652 sig, GFP_KERNEL); 3653 } 3654 } 3655 } 3656 3657 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3658 struct ieee80211_mgmt *mgmt, size_t len, 3659 struct ieee80211_rx_status *rx_status) 3660 { 3661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3662 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3663 size_t baselen; 3664 struct ieee802_11_elems elems; 3665 struct ieee80211_local *local = sdata->local; 3666 struct ieee80211_chanctx_conf *chanctx_conf; 3667 struct ieee80211_channel *chan; 3668 struct sta_info *sta; 3669 u32 changed = 0; 3670 bool erp_valid; 3671 u8 erp_value = 0; 3672 u32 ncrc; 3673 u8 *bssid; 3674 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3675 3676 sdata_assert_lock(sdata); 3677 3678 /* Process beacon from the current BSS */ 3679 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3680 if (baselen > len) 3681 return; 3682 3683 rcu_read_lock(); 3684 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3685 if (!chanctx_conf) { 3686 rcu_read_unlock(); 3687 return; 3688 } 3689 3690 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3691 rcu_read_unlock(); 3692 return; 3693 } 3694 chan = chanctx_conf->def.chan; 3695 rcu_read_unlock(); 3696 3697 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3698 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3699 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3700 len - baselen, false, &elems); 3701 3702 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3703 if (elems.tim && !elems.parse_error) { 3704 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3705 ifmgd->dtim_period = tim_ie->dtim_period; 3706 } 3707 ifmgd->have_beacon = true; 3708 ifmgd->assoc_data->need_beacon = false; 3709 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3710 sdata->vif.bss_conf.sync_tsf = 3711 le64_to_cpu(mgmt->u.beacon.timestamp); 3712 sdata->vif.bss_conf.sync_device_ts = 3713 rx_status->device_timestamp; 3714 if (elems.tim) 3715 sdata->vif.bss_conf.sync_dtim_count = 3716 elems.tim->dtim_count; 3717 else 3718 sdata->vif.bss_conf.sync_dtim_count = 0; 3719 } 3720 /* continue assoc process */ 3721 ifmgd->assoc_data->timeout = jiffies; 3722 ifmgd->assoc_data->timeout_started = true; 3723 run_again(sdata, ifmgd->assoc_data->timeout); 3724 return; 3725 } 3726 3727 if (!ifmgd->associated || 3728 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3729 return; 3730 bssid = ifmgd->associated->bssid; 3731 3732 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3733 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3734 local, rx_status); 3735 3736 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3737 mlme_dbg_ratelimited(sdata, 3738 "cancelling AP probe due to a received beacon\n"); 3739 ieee80211_reset_ap_probe(sdata); 3740 } 3741 3742 /* 3743 * Push the beacon loss detection into the future since 3744 * we are processing a beacon from the AP just now. 3745 */ 3746 ieee80211_sta_reset_beacon_monitor(sdata); 3747 3748 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3749 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3750 len - baselen, false, &elems, 3751 care_about_ies, ncrc); 3752 3753 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3754 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3755 if (local->hw.conf.dynamic_ps_timeout > 0) { 3756 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3757 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3758 ieee80211_hw_config(local, 3759 IEEE80211_CONF_CHANGE_PS); 3760 } 3761 ieee80211_send_nullfunc(local, sdata, false); 3762 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3763 local->pspolling = true; 3764 3765 /* 3766 * Here is assumed that the driver will be 3767 * able to send ps-poll frame and receive a 3768 * response even though power save mode is 3769 * enabled, but some drivers might require 3770 * to disable power save here. This needs 3771 * to be investigated. 3772 */ 3773 ieee80211_send_pspoll(local, sdata); 3774 } 3775 } 3776 3777 if (sdata->vif.p2p || 3778 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3779 struct ieee80211_p2p_noa_attr noa = {}; 3780 int ret; 3781 3782 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3783 len - baselen, 3784 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3785 (u8 *) &noa, sizeof(noa)); 3786 if (ret >= 2) { 3787 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3788 /* valid noa_attr and index changed */ 3789 sdata->u.mgd.p2p_noa_index = noa.index; 3790 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3791 changed |= BSS_CHANGED_P2P_PS; 3792 /* 3793 * make sure we update all information, the CRC 3794 * mechanism doesn't look at P2P attributes. 3795 */ 3796 ifmgd->beacon_crc_valid = false; 3797 } 3798 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3799 /* noa_attr not found and we had valid noa_attr before */ 3800 sdata->u.mgd.p2p_noa_index = -1; 3801 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3802 changed |= BSS_CHANGED_P2P_PS; 3803 ifmgd->beacon_crc_valid = false; 3804 } 3805 } 3806 3807 if (ifmgd->csa_waiting_bcn) 3808 ieee80211_chswitch_post_beacon(sdata); 3809 3810 /* 3811 * Update beacon timing and dtim count on every beacon appearance. This 3812 * will allow the driver to use the most updated values. Do it before 3813 * comparing this one with last received beacon. 3814 * IMPORTANT: These parameters would possibly be out of sync by the time 3815 * the driver will use them. The synchronized view is currently 3816 * guaranteed only in certain callbacks. 3817 */ 3818 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3819 sdata->vif.bss_conf.sync_tsf = 3820 le64_to_cpu(mgmt->u.beacon.timestamp); 3821 sdata->vif.bss_conf.sync_device_ts = 3822 rx_status->device_timestamp; 3823 if (elems.tim) 3824 sdata->vif.bss_conf.sync_dtim_count = 3825 elems.tim->dtim_count; 3826 else 3827 sdata->vif.bss_conf.sync_dtim_count = 0; 3828 } 3829 3830 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3831 return; 3832 ifmgd->beacon_crc = ncrc; 3833 ifmgd->beacon_crc_valid = true; 3834 3835 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3836 3837 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3838 rx_status->device_timestamp, 3839 &elems, true); 3840 3841 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3842 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3843 elems.wmm_param_len, 3844 elems.mu_edca_param_set)) 3845 changed |= BSS_CHANGED_QOS; 3846 3847 /* 3848 * If we haven't had a beacon before, tell the driver about the 3849 * DTIM period (and beacon timing if desired) now. 3850 */ 3851 if (!ifmgd->have_beacon) { 3852 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3853 if (elems.tim) 3854 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3855 else 3856 bss_conf->dtim_period = 1; 3857 3858 changed |= BSS_CHANGED_BEACON_INFO; 3859 ifmgd->have_beacon = true; 3860 3861 mutex_lock(&local->iflist_mtx); 3862 ieee80211_recalc_ps(local); 3863 mutex_unlock(&local->iflist_mtx); 3864 3865 ieee80211_recalc_ps_vif(sdata); 3866 } 3867 3868 if (elems.erp_info) { 3869 erp_valid = true; 3870 erp_value = elems.erp_info[0]; 3871 } else { 3872 erp_valid = false; 3873 } 3874 changed |= ieee80211_handle_bss_capability(sdata, 3875 le16_to_cpu(mgmt->u.beacon.capab_info), 3876 erp_valid, erp_value); 3877 3878 mutex_lock(&local->sta_mtx); 3879 sta = sta_info_get(sdata, bssid); 3880 3881 if (ieee80211_config_bw(sdata, sta, 3882 elems.ht_cap_elem, elems.ht_operation, 3883 elems.vht_operation, elems.he_operation, 3884 bssid, &changed)) { 3885 mutex_unlock(&local->sta_mtx); 3886 sdata_info(sdata, 3887 "failed to follow AP %pM bandwidth change, disconnect\n", 3888 bssid); 3889 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3890 WLAN_REASON_DEAUTH_LEAVING, 3891 true, deauth_buf); 3892 ieee80211_report_disconnect(sdata, deauth_buf, 3893 sizeof(deauth_buf), true, 3894 WLAN_REASON_DEAUTH_LEAVING); 3895 return; 3896 } 3897 3898 if (sta && elems.opmode_notif) 3899 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3900 rx_status->band); 3901 mutex_unlock(&local->sta_mtx); 3902 3903 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3904 elems.country_elem, 3905 elems.country_elem_len, 3906 elems.pwr_constr_elem, 3907 elems.cisco_dtpc_elem); 3908 3909 ieee80211_bss_info_change_notify(sdata, changed); 3910 } 3911 3912 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3913 struct sk_buff *skb) 3914 { 3915 struct ieee80211_rx_status *rx_status; 3916 struct ieee80211_mgmt *mgmt; 3917 u16 fc; 3918 struct ieee802_11_elems elems; 3919 int ies_len; 3920 3921 rx_status = (struct ieee80211_rx_status *) skb->cb; 3922 mgmt = (struct ieee80211_mgmt *) skb->data; 3923 fc = le16_to_cpu(mgmt->frame_control); 3924 3925 sdata_lock(sdata); 3926 3927 switch (fc & IEEE80211_FCTL_STYPE) { 3928 case IEEE80211_STYPE_BEACON: 3929 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3930 break; 3931 case IEEE80211_STYPE_PROBE_RESP: 3932 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3933 break; 3934 case IEEE80211_STYPE_AUTH: 3935 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3936 break; 3937 case IEEE80211_STYPE_DEAUTH: 3938 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3939 break; 3940 case IEEE80211_STYPE_DISASSOC: 3941 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3942 break; 3943 case IEEE80211_STYPE_ASSOC_RESP: 3944 case IEEE80211_STYPE_REASSOC_RESP: 3945 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3946 break; 3947 case IEEE80211_STYPE_ACTION: 3948 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3949 ies_len = skb->len - 3950 offsetof(struct ieee80211_mgmt, 3951 u.action.u.chan_switch.variable); 3952 3953 if (ies_len < 0) 3954 break; 3955 3956 ieee802_11_parse_elems( 3957 mgmt->u.action.u.chan_switch.variable, 3958 ies_len, true, &elems); 3959 3960 if (elems.parse_error) 3961 break; 3962 3963 ieee80211_sta_process_chanswitch(sdata, 3964 rx_status->mactime, 3965 rx_status->device_timestamp, 3966 &elems, false); 3967 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3968 ies_len = skb->len - 3969 offsetof(struct ieee80211_mgmt, 3970 u.action.u.ext_chan_switch.variable); 3971 3972 if (ies_len < 0) 3973 break; 3974 3975 ieee802_11_parse_elems( 3976 mgmt->u.action.u.ext_chan_switch.variable, 3977 ies_len, true, &elems); 3978 3979 if (elems.parse_error) 3980 break; 3981 3982 /* for the handling code pretend this was also an IE */ 3983 elems.ext_chansw_ie = 3984 &mgmt->u.action.u.ext_chan_switch.data; 3985 3986 ieee80211_sta_process_chanswitch(sdata, 3987 rx_status->mactime, 3988 rx_status->device_timestamp, 3989 &elems, false); 3990 } 3991 break; 3992 } 3993 sdata_unlock(sdata); 3994 } 3995 3996 static void ieee80211_sta_timer(struct timer_list *t) 3997 { 3998 struct ieee80211_sub_if_data *sdata = 3999 from_timer(sdata, t, u.mgd.timer); 4000 4001 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4002 } 4003 4004 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4005 u8 *bssid, u8 reason, bool tx) 4006 { 4007 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4008 4009 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4010 tx, frame_buf); 4011 4012 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4013 reason); 4014 } 4015 4016 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4017 { 4018 struct ieee80211_local *local = sdata->local; 4019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4020 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4021 u32 tx_flags = 0; 4022 u16 trans = 1; 4023 u16 status = 0; 4024 u16 prepare_tx_duration = 0; 4025 4026 sdata_assert_lock(sdata); 4027 4028 if (WARN_ON_ONCE(!auth_data)) 4029 return -EINVAL; 4030 4031 auth_data->tries++; 4032 4033 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4034 sdata_info(sdata, "authentication with %pM timed out\n", 4035 auth_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, auth_data->bss); 4042 4043 return -ETIMEDOUT; 4044 } 4045 4046 if (auth_data->algorithm == WLAN_AUTH_SAE) 4047 prepare_tx_duration = 4048 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4049 4050 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4051 4052 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4053 auth_data->bss->bssid, auth_data->tries, 4054 IEEE80211_AUTH_MAX_TRIES); 4055 4056 auth_data->expected_transaction = 2; 4057 4058 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4059 trans = auth_data->sae_trans; 4060 status = auth_data->sae_status; 4061 auth_data->expected_transaction = trans; 4062 } 4063 4064 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4065 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4066 IEEE80211_TX_INTFL_MLME_CONN_TX; 4067 4068 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4069 auth_data->data, auth_data->data_len, 4070 auth_data->bss->bssid, 4071 auth_data->bss->bssid, NULL, 0, 0, 4072 tx_flags); 4073 4074 if (tx_flags == 0) { 4075 if (auth_data->algorithm == WLAN_AUTH_SAE) 4076 auth_data->timeout = jiffies + 4077 IEEE80211_AUTH_TIMEOUT_SAE; 4078 else 4079 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4080 } else { 4081 auth_data->timeout = 4082 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4083 } 4084 4085 auth_data->timeout_started = true; 4086 run_again(sdata, auth_data->timeout); 4087 4088 return 0; 4089 } 4090 4091 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4092 { 4093 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4094 struct ieee80211_local *local = sdata->local; 4095 4096 sdata_assert_lock(sdata); 4097 4098 assoc_data->tries++; 4099 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4100 sdata_info(sdata, "association with %pM timed out\n", 4101 assoc_data->bss->bssid); 4102 4103 /* 4104 * Most likely AP is not in the range so remove the 4105 * bss struct for that AP. 4106 */ 4107 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4108 4109 return -ETIMEDOUT; 4110 } 4111 4112 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4113 assoc_data->bss->bssid, assoc_data->tries, 4114 IEEE80211_ASSOC_MAX_TRIES); 4115 ieee80211_send_assoc(sdata); 4116 4117 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4118 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4119 assoc_data->timeout_started = true; 4120 run_again(sdata, assoc_data->timeout); 4121 } else { 4122 assoc_data->timeout = 4123 round_jiffies_up(jiffies + 4124 IEEE80211_ASSOC_TIMEOUT_LONG); 4125 assoc_data->timeout_started = true; 4126 run_again(sdata, assoc_data->timeout); 4127 } 4128 4129 return 0; 4130 } 4131 4132 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4133 __le16 fc, bool acked) 4134 { 4135 struct ieee80211_local *local = sdata->local; 4136 4137 sdata->u.mgd.status_fc = fc; 4138 sdata->u.mgd.status_acked = acked; 4139 sdata->u.mgd.status_received = true; 4140 4141 ieee80211_queue_work(&local->hw, &sdata->work); 4142 } 4143 4144 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4145 { 4146 struct ieee80211_local *local = sdata->local; 4147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4148 4149 sdata_lock(sdata); 4150 4151 if (ifmgd->status_received) { 4152 __le16 fc = ifmgd->status_fc; 4153 bool status_acked = ifmgd->status_acked; 4154 4155 ifmgd->status_received = false; 4156 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4157 if (status_acked) { 4158 if (ifmgd->auth_data->algorithm == 4159 WLAN_AUTH_SAE) 4160 ifmgd->auth_data->timeout = 4161 jiffies + 4162 IEEE80211_AUTH_TIMEOUT_SAE; 4163 else 4164 ifmgd->auth_data->timeout = 4165 jiffies + 4166 IEEE80211_AUTH_TIMEOUT_SHORT; 4167 run_again(sdata, ifmgd->auth_data->timeout); 4168 } else { 4169 ifmgd->auth_data->timeout = jiffies - 1; 4170 } 4171 ifmgd->auth_data->timeout_started = true; 4172 } else if (ifmgd->assoc_data && 4173 (ieee80211_is_assoc_req(fc) || 4174 ieee80211_is_reassoc_req(fc))) { 4175 if (status_acked) { 4176 ifmgd->assoc_data->timeout = 4177 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4178 run_again(sdata, ifmgd->assoc_data->timeout); 4179 } else { 4180 ifmgd->assoc_data->timeout = jiffies - 1; 4181 } 4182 ifmgd->assoc_data->timeout_started = true; 4183 } 4184 } 4185 4186 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4187 time_after(jiffies, ifmgd->auth_data->timeout)) { 4188 if (ifmgd->auth_data->done) { 4189 /* 4190 * ok ... we waited for assoc but userspace didn't, 4191 * so let's just kill the auth data 4192 */ 4193 ieee80211_destroy_auth_data(sdata, false); 4194 } else if (ieee80211_auth(sdata)) { 4195 u8 bssid[ETH_ALEN]; 4196 struct ieee80211_event event = { 4197 .type = MLME_EVENT, 4198 .u.mlme.data = AUTH_EVENT, 4199 .u.mlme.status = MLME_TIMEOUT, 4200 }; 4201 4202 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4203 4204 ieee80211_destroy_auth_data(sdata, false); 4205 4206 cfg80211_auth_timeout(sdata->dev, bssid); 4207 drv_event_callback(sdata->local, sdata, &event); 4208 } 4209 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4210 run_again(sdata, ifmgd->auth_data->timeout); 4211 4212 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4213 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4214 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4215 ieee80211_do_assoc(sdata)) { 4216 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4217 struct ieee80211_event event = { 4218 .type = MLME_EVENT, 4219 .u.mlme.data = ASSOC_EVENT, 4220 .u.mlme.status = MLME_TIMEOUT, 4221 }; 4222 4223 ieee80211_destroy_assoc_data(sdata, false, false); 4224 cfg80211_assoc_timeout(sdata->dev, bss); 4225 drv_event_callback(sdata->local, sdata, &event); 4226 } 4227 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4228 run_again(sdata, ifmgd->assoc_data->timeout); 4229 4230 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4231 ifmgd->associated) { 4232 u8 bssid[ETH_ALEN]; 4233 int max_tries; 4234 4235 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4236 4237 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4238 max_tries = max_nullfunc_tries; 4239 else 4240 max_tries = max_probe_tries; 4241 4242 /* ACK received for nullfunc probing frame */ 4243 if (!ifmgd->probe_send_count) 4244 ieee80211_reset_ap_probe(sdata); 4245 else if (ifmgd->nullfunc_failed) { 4246 if (ifmgd->probe_send_count < max_tries) { 4247 mlme_dbg(sdata, 4248 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4249 bssid, ifmgd->probe_send_count, 4250 max_tries); 4251 ieee80211_mgd_probe_ap_send(sdata); 4252 } else { 4253 mlme_dbg(sdata, 4254 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4255 bssid); 4256 ieee80211_sta_connection_lost(sdata, bssid, 4257 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4258 false); 4259 } 4260 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4261 run_again(sdata, ifmgd->probe_timeout); 4262 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4263 mlme_dbg(sdata, 4264 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4265 bssid, probe_wait_ms); 4266 ieee80211_sta_connection_lost(sdata, bssid, 4267 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4268 } else if (ifmgd->probe_send_count < max_tries) { 4269 mlme_dbg(sdata, 4270 "No probe response from AP %pM after %dms, try %d/%i\n", 4271 bssid, probe_wait_ms, 4272 ifmgd->probe_send_count, max_tries); 4273 ieee80211_mgd_probe_ap_send(sdata); 4274 } else { 4275 /* 4276 * We actually lost the connection ... or did we? 4277 * Let's make sure! 4278 */ 4279 mlme_dbg(sdata, 4280 "No probe response from AP %pM after %dms, disconnecting.\n", 4281 bssid, probe_wait_ms); 4282 4283 ieee80211_sta_connection_lost(sdata, bssid, 4284 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4285 } 4286 } 4287 4288 sdata_unlock(sdata); 4289 } 4290 4291 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4292 { 4293 struct ieee80211_sub_if_data *sdata = 4294 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4296 4297 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4298 return; 4299 4300 sdata->u.mgd.connection_loss = false; 4301 ieee80211_queue_work(&sdata->local->hw, 4302 &sdata->u.mgd.beacon_connection_loss_work); 4303 } 4304 4305 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4306 { 4307 struct ieee80211_sub_if_data *sdata = 4308 from_timer(sdata, t, u.mgd.conn_mon_timer); 4309 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4310 struct ieee80211_local *local = sdata->local; 4311 4312 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4313 return; 4314 4315 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4316 } 4317 4318 static void ieee80211_sta_monitor_work(struct work_struct *work) 4319 { 4320 struct ieee80211_sub_if_data *sdata = 4321 container_of(work, struct ieee80211_sub_if_data, 4322 u.mgd.monitor_work); 4323 4324 ieee80211_mgd_probe_ap(sdata, false); 4325 } 4326 4327 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4328 { 4329 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4330 __ieee80211_stop_poll(sdata); 4331 4332 /* let's probe the connection once */ 4333 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4334 ieee80211_queue_work(&sdata->local->hw, 4335 &sdata->u.mgd.monitor_work); 4336 } 4337 } 4338 4339 #ifdef CONFIG_PM 4340 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4341 { 4342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4343 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4344 4345 sdata_lock(sdata); 4346 4347 if (ifmgd->auth_data || ifmgd->assoc_data) { 4348 const u8 *bssid = ifmgd->auth_data ? 4349 ifmgd->auth_data->bss->bssid : 4350 ifmgd->assoc_data->bss->bssid; 4351 4352 /* 4353 * If we are trying to authenticate / associate while suspending, 4354 * cfg80211 won't know and won't actually abort those attempts, 4355 * thus we need to do that ourselves. 4356 */ 4357 ieee80211_send_deauth_disassoc(sdata, bssid, 4358 IEEE80211_STYPE_DEAUTH, 4359 WLAN_REASON_DEAUTH_LEAVING, 4360 false, frame_buf); 4361 if (ifmgd->assoc_data) 4362 ieee80211_destroy_assoc_data(sdata, false, true); 4363 if (ifmgd->auth_data) 4364 ieee80211_destroy_auth_data(sdata, false); 4365 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4366 IEEE80211_DEAUTH_FRAME_LEN); 4367 } 4368 4369 /* This is a bit of a hack - we should find a better and more generic 4370 * solution to this. Normally when suspending, cfg80211 will in fact 4371 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4372 * auth (not so important) or assoc (this is the problem) process. 4373 * 4374 * As a consequence, it can happen that we are in the process of both 4375 * associating and suspending, and receive an association response 4376 * after cfg80211 has checked if it needs to disconnect, but before 4377 * we actually set the flag to drop incoming frames. This will then 4378 * cause the workqueue flush to process the association response in 4379 * the suspend, resulting in a successful association just before it 4380 * tries to remove the interface from the driver, which now though 4381 * has a channel context assigned ... this results in issues. 4382 * 4383 * To work around this (for now) simply deauth here again if we're 4384 * now connected. 4385 */ 4386 if (ifmgd->associated && !sdata->local->wowlan) { 4387 u8 bssid[ETH_ALEN]; 4388 struct cfg80211_deauth_request req = { 4389 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4390 .bssid = bssid, 4391 }; 4392 4393 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4394 ieee80211_mgd_deauth(sdata, &req); 4395 } 4396 4397 sdata_unlock(sdata); 4398 } 4399 4400 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4401 { 4402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4403 4404 sdata_lock(sdata); 4405 if (!ifmgd->associated) { 4406 sdata_unlock(sdata); 4407 return; 4408 } 4409 4410 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4411 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4412 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4413 ieee80211_sta_connection_lost(sdata, 4414 ifmgd->associated->bssid, 4415 WLAN_REASON_UNSPECIFIED, 4416 true); 4417 sdata_unlock(sdata); 4418 return; 4419 } 4420 sdata_unlock(sdata); 4421 } 4422 #endif 4423 4424 /* interface setup */ 4425 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4426 { 4427 struct ieee80211_if_managed *ifmgd; 4428 4429 ifmgd = &sdata->u.mgd; 4430 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4431 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4432 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4433 ieee80211_beacon_connection_loss_work); 4434 INIT_WORK(&ifmgd->csa_connection_drop_work, 4435 ieee80211_csa_connection_drop_work); 4436 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4437 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4438 ieee80211_tdls_peer_del_work); 4439 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4440 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4441 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4442 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4443 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4444 ieee80211_sta_handle_tspec_ac_params_wk); 4445 4446 ifmgd->flags = 0; 4447 ifmgd->powersave = sdata->wdev.ps; 4448 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4449 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4450 ifmgd->p2p_noa_index = -1; 4451 4452 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4453 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4454 else 4455 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4456 4457 /* Setup TDLS data */ 4458 spin_lock_init(&ifmgd->teardown_lock); 4459 ifmgd->teardown_skb = NULL; 4460 ifmgd->orig_teardown_skb = NULL; 4461 } 4462 4463 /* scan finished notification */ 4464 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4465 { 4466 struct ieee80211_sub_if_data *sdata; 4467 4468 /* Restart STA timers */ 4469 rcu_read_lock(); 4470 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4471 if (ieee80211_sdata_running(sdata)) 4472 ieee80211_restart_sta_timer(sdata); 4473 } 4474 rcu_read_unlock(); 4475 } 4476 4477 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4478 struct cfg80211_bss *cbss) 4479 { 4480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4481 const u8 *ht_cap_ie, *vht_cap_ie; 4482 const struct ieee80211_ht_cap *ht_cap; 4483 const struct ieee80211_vht_cap *vht_cap; 4484 u8 chains = 1; 4485 4486 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4487 return chains; 4488 4489 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4490 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4491 ht_cap = (void *)(ht_cap_ie + 2); 4492 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4493 /* 4494 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4495 * "Tx Unequal Modulation Supported" fields. 4496 */ 4497 } 4498 4499 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4500 return chains; 4501 4502 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4503 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4504 u8 nss; 4505 u16 tx_mcs_map; 4506 4507 vht_cap = (void *)(vht_cap_ie + 2); 4508 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4509 for (nss = 8; nss > 0; nss--) { 4510 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4511 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4512 break; 4513 } 4514 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4515 chains = max(chains, nss); 4516 } 4517 4518 return chains; 4519 } 4520 4521 static bool 4522 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4523 const struct ieee80211_he_operation *he_op) 4524 { 4525 const struct ieee80211_sta_he_cap *sta_he_cap = 4526 ieee80211_get_he_sta_cap(sband); 4527 u16 ap_min_req_set; 4528 int i; 4529 4530 if (!sta_he_cap || !he_op) 4531 return false; 4532 4533 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4534 4535 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4536 for (i = 0; i < 3; i++) { 4537 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4538 &sta_he_cap->he_mcs_nss_supp; 4539 u16 sta_mcs_map_rx = 4540 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4541 u16 sta_mcs_map_tx = 4542 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4543 u8 nss; 4544 bool verified = true; 4545 4546 /* 4547 * For each band there is a maximum of 8 spatial streams 4548 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4549 * of 2 bits per NSS (1-8), with the values defined in enum 4550 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4551 * capabilities aren't less than the AP's minimum requirements 4552 * for this HE BSS per SS. 4553 * It is enough to find one such band that meets the reqs. 4554 */ 4555 for (nss = 8; nss > 0; nss--) { 4556 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4557 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4558 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4559 4560 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4561 continue; 4562 4563 /* 4564 * Make sure the HE AP doesn't require MCSs that aren't 4565 * supported by the client 4566 */ 4567 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4568 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4569 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4570 verified = false; 4571 break; 4572 } 4573 } 4574 4575 if (verified) 4576 return true; 4577 } 4578 4579 /* If here, STA doesn't meet AP's HE min requirements */ 4580 return false; 4581 } 4582 4583 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4584 struct cfg80211_bss *cbss) 4585 { 4586 struct ieee80211_local *local = sdata->local; 4587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4588 const struct ieee80211_ht_cap *ht_cap = NULL; 4589 const struct ieee80211_ht_operation *ht_oper = NULL; 4590 const struct ieee80211_vht_operation *vht_oper = NULL; 4591 const struct ieee80211_he_operation *he_oper = NULL; 4592 struct ieee80211_supported_band *sband; 4593 struct cfg80211_chan_def chandef; 4594 int ret; 4595 u32 i; 4596 bool have_80mhz; 4597 4598 sband = local->hw.wiphy->bands[cbss->channel->band]; 4599 4600 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4601 IEEE80211_STA_DISABLE_80P80MHZ | 4602 IEEE80211_STA_DISABLE_160MHZ); 4603 4604 rcu_read_lock(); 4605 4606 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4607 sband->ht_cap.ht_supported) { 4608 const u8 *ht_oper_ie, *ht_cap_ie; 4609 4610 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4611 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4612 ht_oper = (void *)(ht_oper_ie + 2); 4613 4614 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4615 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4616 ht_cap = (void *)(ht_cap_ie + 2); 4617 4618 if (!ht_cap) { 4619 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4620 ht_oper = NULL; 4621 } 4622 } 4623 4624 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4625 sband->vht_cap.vht_supported) { 4626 const u8 *vht_oper_ie, *vht_cap; 4627 4628 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4629 WLAN_EID_VHT_OPERATION); 4630 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4631 vht_oper = (void *)(vht_oper_ie + 2); 4632 if (vht_oper && !ht_oper) { 4633 vht_oper = NULL; 4634 sdata_info(sdata, 4635 "AP advertised VHT without HT, disabling both\n"); 4636 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4637 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4638 } 4639 4640 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4641 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4642 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4643 vht_oper = NULL; 4644 } 4645 } 4646 4647 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 4648 ieee80211_get_he_sta_cap(sband)) { 4649 const struct cfg80211_bss_ies *ies; 4650 const u8 *he_oper_ie; 4651 4652 ies = rcu_dereference(cbss->ies); 4653 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4654 ies->data, ies->len); 4655 if (he_oper_ie && 4656 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4657 he_oper = (void *)(he_oper_ie + 3); 4658 else 4659 he_oper = NULL; 4660 4661 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4662 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4663 } 4664 4665 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4666 have_80mhz = false; 4667 for (i = 0; i < sband->n_channels; i++) { 4668 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4669 IEEE80211_CHAN_NO_80MHZ)) 4670 continue; 4671 4672 have_80mhz = true; 4673 break; 4674 } 4675 4676 if (!have_80mhz) 4677 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4678 4679 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4680 cbss->channel, 4681 ht_oper, vht_oper, he_oper, 4682 &chandef, false); 4683 4684 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4685 local->rx_chains); 4686 4687 rcu_read_unlock(); 4688 4689 /* will change later if needed */ 4690 sdata->smps_mode = IEEE80211_SMPS_OFF; 4691 4692 mutex_lock(&local->mtx); 4693 /* 4694 * If this fails (possibly due to channel context sharing 4695 * on incompatible channels, e.g. 80+80 and 160 sharing the 4696 * same control channel) try to use a smaller bandwidth. 4697 */ 4698 ret = ieee80211_vif_use_channel(sdata, &chandef, 4699 IEEE80211_CHANCTX_SHARED); 4700 4701 /* don't downgrade for 5 and 10 MHz channels, though. */ 4702 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4703 chandef.width == NL80211_CHAN_WIDTH_10) 4704 goto out; 4705 4706 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4707 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4708 ret = ieee80211_vif_use_channel(sdata, &chandef, 4709 IEEE80211_CHANCTX_SHARED); 4710 } 4711 out: 4712 mutex_unlock(&local->mtx); 4713 return ret; 4714 } 4715 4716 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4717 struct cfg80211_bss *cbss, bool assoc, 4718 bool override) 4719 { 4720 struct ieee80211_local *local = sdata->local; 4721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4722 struct ieee80211_bss *bss = (void *)cbss->priv; 4723 struct sta_info *new_sta = NULL; 4724 struct ieee80211_supported_band *sband; 4725 bool have_sta = false; 4726 int err; 4727 4728 sband = local->hw.wiphy->bands[cbss->channel->band]; 4729 4730 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4731 return -EINVAL; 4732 4733 /* If a reconfig is happening, bail out */ 4734 if (local->in_reconfig) 4735 return -EBUSY; 4736 4737 if (assoc) { 4738 rcu_read_lock(); 4739 have_sta = sta_info_get(sdata, cbss->bssid); 4740 rcu_read_unlock(); 4741 } 4742 4743 if (!have_sta) { 4744 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4745 if (!new_sta) 4746 return -ENOMEM; 4747 } 4748 4749 /* 4750 * Set up the information for the new channel before setting the 4751 * new channel. We can't - completely race-free - change the basic 4752 * rates bitmap and the channel (sband) that it refers to, but if 4753 * we set it up before we at least avoid calling into the driver's 4754 * bss_info_changed() method with invalid information (since we do 4755 * call that from changing the channel - only for IDLE and perhaps 4756 * some others, but ...). 4757 * 4758 * So to avoid that, just set up all the new information before the 4759 * channel, but tell the driver to apply it only afterwards, since 4760 * it might need the new channel for that. 4761 */ 4762 if (new_sta) { 4763 u32 rates = 0, basic_rates = 0; 4764 bool have_higher_than_11mbit; 4765 int min_rate = INT_MAX, min_rate_index = -1; 4766 const struct cfg80211_bss_ies *ies; 4767 int shift = ieee80211_vif_get_shift(&sdata->vif); 4768 4769 ieee80211_get_rates(sband, bss->supp_rates, 4770 bss->supp_rates_len, 4771 &rates, &basic_rates, 4772 &have_higher_than_11mbit, 4773 &min_rate, &min_rate_index, 4774 shift); 4775 4776 /* 4777 * This used to be a workaround for basic rates missing 4778 * in the association response frame. Now that we no 4779 * longer use the basic rates from there, it probably 4780 * doesn't happen any more, but keep the workaround so 4781 * in case some *other* APs are buggy in different ways 4782 * we can connect -- with a warning. 4783 */ 4784 if (!basic_rates && min_rate_index >= 0) { 4785 sdata_info(sdata, 4786 "No basic rates, using min rate instead\n"); 4787 basic_rates = BIT(min_rate_index); 4788 } 4789 4790 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4791 sdata->vif.bss_conf.basic_rates = basic_rates; 4792 4793 /* cf. IEEE 802.11 9.2.12 */ 4794 if (cbss->channel->band == NL80211_BAND_2GHZ && 4795 have_higher_than_11mbit) 4796 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4797 else 4798 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4799 4800 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4801 4802 /* set timing information */ 4803 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4804 rcu_read_lock(); 4805 ies = rcu_dereference(cbss->beacon_ies); 4806 if (ies) { 4807 const u8 *tim_ie; 4808 4809 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4810 sdata->vif.bss_conf.sync_device_ts = 4811 bss->device_ts_beacon; 4812 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4813 ies->data, ies->len); 4814 if (tim_ie && tim_ie[1] >= 2) 4815 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4816 else 4817 sdata->vif.bss_conf.sync_dtim_count = 0; 4818 } else if (!ieee80211_hw_check(&sdata->local->hw, 4819 TIMING_BEACON_ONLY)) { 4820 ies = rcu_dereference(cbss->proberesp_ies); 4821 /* must be non-NULL since beacon IEs were NULL */ 4822 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4823 sdata->vif.bss_conf.sync_device_ts = 4824 bss->device_ts_presp; 4825 sdata->vif.bss_conf.sync_dtim_count = 0; 4826 } else { 4827 sdata->vif.bss_conf.sync_tsf = 0; 4828 sdata->vif.bss_conf.sync_device_ts = 0; 4829 sdata->vif.bss_conf.sync_dtim_count = 0; 4830 } 4831 rcu_read_unlock(); 4832 } 4833 4834 if (new_sta || override) { 4835 err = ieee80211_prep_channel(sdata, cbss); 4836 if (err) { 4837 if (new_sta) 4838 sta_info_free(local, new_sta); 4839 return -EINVAL; 4840 } 4841 } 4842 4843 if (new_sta) { 4844 /* 4845 * tell driver about BSSID, basic rates and timing 4846 * this was set up above, before setting the channel 4847 */ 4848 ieee80211_bss_info_change_notify(sdata, 4849 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4850 BSS_CHANGED_BEACON_INT); 4851 4852 if (assoc) 4853 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4854 4855 err = sta_info_insert(new_sta); 4856 new_sta = NULL; 4857 if (err) { 4858 sdata_info(sdata, 4859 "failed to insert STA entry for the AP (error %d)\n", 4860 err); 4861 return err; 4862 } 4863 } else 4864 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4865 4866 /* Cancel scan to ensure that nothing interferes with connection */ 4867 if (local->scanning) 4868 ieee80211_scan_cancel(local); 4869 4870 return 0; 4871 } 4872 4873 /* config hooks */ 4874 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4875 struct cfg80211_auth_request *req) 4876 { 4877 struct ieee80211_local *local = sdata->local; 4878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4879 struct ieee80211_mgd_auth_data *auth_data; 4880 u16 auth_alg; 4881 int err; 4882 4883 /* prepare auth data structure */ 4884 4885 switch (req->auth_type) { 4886 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4887 auth_alg = WLAN_AUTH_OPEN; 4888 break; 4889 case NL80211_AUTHTYPE_SHARED_KEY: 4890 if (IS_ERR(local->wep_tx_tfm)) 4891 return -EOPNOTSUPP; 4892 auth_alg = WLAN_AUTH_SHARED_KEY; 4893 break; 4894 case NL80211_AUTHTYPE_FT: 4895 auth_alg = WLAN_AUTH_FT; 4896 break; 4897 case NL80211_AUTHTYPE_NETWORK_EAP: 4898 auth_alg = WLAN_AUTH_LEAP; 4899 break; 4900 case NL80211_AUTHTYPE_SAE: 4901 auth_alg = WLAN_AUTH_SAE; 4902 break; 4903 case NL80211_AUTHTYPE_FILS_SK: 4904 auth_alg = WLAN_AUTH_FILS_SK; 4905 break; 4906 case NL80211_AUTHTYPE_FILS_SK_PFS: 4907 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4908 break; 4909 case NL80211_AUTHTYPE_FILS_PK: 4910 auth_alg = WLAN_AUTH_FILS_PK; 4911 break; 4912 default: 4913 return -EOPNOTSUPP; 4914 } 4915 4916 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4917 req->ie_len, GFP_KERNEL); 4918 if (!auth_data) 4919 return -ENOMEM; 4920 4921 auth_data->bss = req->bss; 4922 4923 if (req->auth_data_len >= 4) { 4924 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4925 __le16 *pos = (__le16 *) req->auth_data; 4926 4927 auth_data->sae_trans = le16_to_cpu(pos[0]); 4928 auth_data->sae_status = le16_to_cpu(pos[1]); 4929 } 4930 memcpy(auth_data->data, req->auth_data + 4, 4931 req->auth_data_len - 4); 4932 auth_data->data_len += req->auth_data_len - 4; 4933 } 4934 4935 if (req->ie && req->ie_len) { 4936 memcpy(&auth_data->data[auth_data->data_len], 4937 req->ie, req->ie_len); 4938 auth_data->data_len += req->ie_len; 4939 } 4940 4941 if (req->key && req->key_len) { 4942 auth_data->key_len = req->key_len; 4943 auth_data->key_idx = req->key_idx; 4944 memcpy(auth_data->key, req->key, req->key_len); 4945 } 4946 4947 auth_data->algorithm = auth_alg; 4948 4949 /* try to authenticate/probe */ 4950 4951 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4952 ifmgd->assoc_data) { 4953 err = -EBUSY; 4954 goto err_free; 4955 } 4956 4957 if (ifmgd->auth_data) 4958 ieee80211_destroy_auth_data(sdata, false); 4959 4960 /* prep auth_data so we don't go into idle on disassoc */ 4961 ifmgd->auth_data = auth_data; 4962 4963 if (ifmgd->associated) { 4964 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4965 4966 sdata_info(sdata, 4967 "disconnect from AP %pM for new auth to %pM\n", 4968 ifmgd->associated->bssid, req->bss->bssid); 4969 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4970 WLAN_REASON_UNSPECIFIED, 4971 false, frame_buf); 4972 4973 ieee80211_report_disconnect(sdata, frame_buf, 4974 sizeof(frame_buf), true, 4975 WLAN_REASON_UNSPECIFIED); 4976 } 4977 4978 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4979 4980 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4981 if (err) 4982 goto err_clear; 4983 4984 err = ieee80211_auth(sdata); 4985 if (err) { 4986 sta_info_destroy_addr(sdata, req->bss->bssid); 4987 goto err_clear; 4988 } 4989 4990 /* hold our own reference */ 4991 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4992 return 0; 4993 4994 err_clear: 4995 eth_zero_addr(ifmgd->bssid); 4996 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4997 ifmgd->auth_data = NULL; 4998 mutex_lock(&sdata->local->mtx); 4999 ieee80211_vif_release_channel(sdata); 5000 mutex_unlock(&sdata->local->mtx); 5001 err_free: 5002 kfree(auth_data); 5003 return err; 5004 } 5005 5006 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5007 struct cfg80211_assoc_request *req) 5008 { 5009 struct ieee80211_local *local = sdata->local; 5010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5011 struct ieee80211_bss *bss = (void *)req->bss->priv; 5012 struct ieee80211_mgd_assoc_data *assoc_data; 5013 const struct cfg80211_bss_ies *beacon_ies; 5014 struct ieee80211_supported_band *sband; 5015 const u8 *ssidie, *ht_ie, *vht_ie; 5016 int i, err; 5017 bool override = false; 5018 5019 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5020 if (!assoc_data) 5021 return -ENOMEM; 5022 5023 rcu_read_lock(); 5024 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5025 if (!ssidie) { 5026 rcu_read_unlock(); 5027 kfree(assoc_data); 5028 return -EINVAL; 5029 } 5030 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5031 assoc_data->ssid_len = ssidie[1]; 5032 rcu_read_unlock(); 5033 5034 if (ifmgd->associated) { 5035 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5036 5037 sdata_info(sdata, 5038 "disconnect from AP %pM for new assoc to %pM\n", 5039 ifmgd->associated->bssid, req->bss->bssid); 5040 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5041 WLAN_REASON_UNSPECIFIED, 5042 false, frame_buf); 5043 5044 ieee80211_report_disconnect(sdata, frame_buf, 5045 sizeof(frame_buf), true, 5046 WLAN_REASON_UNSPECIFIED); 5047 } 5048 5049 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5050 err = -EBUSY; 5051 goto err_free; 5052 } 5053 5054 if (ifmgd->assoc_data) { 5055 err = -EBUSY; 5056 goto err_free; 5057 } 5058 5059 if (ifmgd->auth_data) { 5060 bool match; 5061 5062 /* keep sta info, bssid if matching */ 5063 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5064 ieee80211_destroy_auth_data(sdata, match); 5065 } 5066 5067 /* prepare assoc data */ 5068 5069 ifmgd->beacon_crc_valid = false; 5070 5071 assoc_data->wmm = bss->wmm_used && 5072 (local->hw.queues >= IEEE80211_NUM_ACS); 5073 5074 /* 5075 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5076 * We still associate in non-HT mode (11a/b/g) if any one of these 5077 * ciphers is configured as pairwise. 5078 * We can set this to true for non-11n hardware, that'll be checked 5079 * separately along with the peer capabilities. 5080 */ 5081 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5082 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5083 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5084 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5085 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5086 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5087 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5088 netdev_info(sdata->dev, 5089 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5090 } 5091 } 5092 5093 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5094 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5095 if (!sband->ht_cap.ht_supported || 5096 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5097 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5098 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5099 if (!bss->wmm_used && 5100 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5101 netdev_info(sdata->dev, 5102 "disabling HT as WMM/QoS is not supported by the AP\n"); 5103 } 5104 5105 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5106 if (!sband->vht_cap.vht_supported || 5107 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5108 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5109 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5110 if (!bss->wmm_used && 5111 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5112 netdev_info(sdata->dev, 5113 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5114 } 5115 5116 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5117 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5118 sizeof(ifmgd->ht_capa_mask)); 5119 5120 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5121 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5122 sizeof(ifmgd->vht_capa_mask)); 5123 5124 if (req->ie && req->ie_len) { 5125 memcpy(assoc_data->ie, req->ie, req->ie_len); 5126 assoc_data->ie_len = req->ie_len; 5127 } 5128 5129 if (req->fils_kek) { 5130 /* should already be checked in cfg80211 - so warn */ 5131 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5132 err = -EINVAL; 5133 goto err_free; 5134 } 5135 memcpy(assoc_data->fils_kek, req->fils_kek, 5136 req->fils_kek_len); 5137 assoc_data->fils_kek_len = req->fils_kek_len; 5138 } 5139 5140 if (req->fils_nonces) 5141 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5142 2 * FILS_NONCE_LEN); 5143 5144 assoc_data->bss = req->bss; 5145 5146 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5147 if (ifmgd->powersave) 5148 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5149 else 5150 sdata->smps_mode = IEEE80211_SMPS_OFF; 5151 } else 5152 sdata->smps_mode = ifmgd->req_smps; 5153 5154 assoc_data->capability = req->bss->capability; 5155 assoc_data->supp_rates = bss->supp_rates; 5156 assoc_data->supp_rates_len = bss->supp_rates_len; 5157 5158 rcu_read_lock(); 5159 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5160 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5161 assoc_data->ap_ht_param = 5162 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5163 else 5164 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5165 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5166 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5167 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5168 sizeof(struct ieee80211_vht_cap)); 5169 else 5170 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5171 rcu_read_unlock(); 5172 5173 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5174 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5175 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5176 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5177 5178 if (bss->wmm_used && bss->uapsd_supported && 5179 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5180 assoc_data->uapsd = true; 5181 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5182 } else { 5183 assoc_data->uapsd = false; 5184 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5185 } 5186 5187 if (req->prev_bssid) 5188 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5189 5190 if (req->use_mfp) { 5191 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5192 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5193 } else { 5194 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5195 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5196 } 5197 5198 if (req->flags & ASSOC_REQ_USE_RRM) 5199 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5200 else 5201 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5202 5203 if (req->crypto.control_port) 5204 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5205 else 5206 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5207 5208 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5209 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5210 sdata->control_port_over_nl80211 = 5211 req->crypto.control_port_over_nl80211; 5212 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5213 sdata->vif.type); 5214 5215 /* kick off associate process */ 5216 5217 ifmgd->assoc_data = assoc_data; 5218 ifmgd->dtim_period = 0; 5219 ifmgd->have_beacon = false; 5220 5221 /* override HT/VHT configuration only if the AP and we support it */ 5222 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5223 struct ieee80211_sta_ht_cap sta_ht_cap; 5224 5225 if (req->flags & ASSOC_REQ_DISABLE_HT) 5226 override = true; 5227 5228 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5229 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5230 5231 /* check for 40 MHz disable override */ 5232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5233 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5234 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5235 override = true; 5236 5237 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5238 req->flags & ASSOC_REQ_DISABLE_VHT) 5239 override = true; 5240 } 5241 5242 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5243 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5244 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5245 } 5246 5247 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5248 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5249 5250 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5251 if (err) 5252 goto err_clear; 5253 5254 rcu_read_lock(); 5255 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5256 5257 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5258 !beacon_ies) { 5259 /* 5260 * Wait up to one beacon interval ... 5261 * should this be more if we miss one? 5262 */ 5263 sdata_info(sdata, "waiting for beacon from %pM\n", 5264 ifmgd->bssid); 5265 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5266 assoc_data->timeout_started = true; 5267 assoc_data->need_beacon = true; 5268 } else if (beacon_ies) { 5269 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 5270 beacon_ies->data, 5271 beacon_ies->len); 5272 u8 dtim_count = 0; 5273 5274 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 5275 const struct ieee80211_tim_ie *tim; 5276 tim = (void *)(tim_ie + 2); 5277 ifmgd->dtim_period = tim->dtim_period; 5278 dtim_count = tim->dtim_count; 5279 } 5280 ifmgd->have_beacon = true; 5281 assoc_data->timeout = jiffies; 5282 assoc_data->timeout_started = true; 5283 5284 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5285 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5286 sdata->vif.bss_conf.sync_device_ts = 5287 bss->device_ts_beacon; 5288 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5289 } 5290 } else { 5291 assoc_data->timeout = jiffies; 5292 assoc_data->timeout_started = true; 5293 } 5294 rcu_read_unlock(); 5295 5296 run_again(sdata, assoc_data->timeout); 5297 5298 if (bss->corrupt_data) { 5299 char *corrupt_type = "data"; 5300 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5301 if (bss->corrupt_data & 5302 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5303 corrupt_type = "beacon and probe response"; 5304 else 5305 corrupt_type = "beacon"; 5306 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5307 corrupt_type = "probe response"; 5308 sdata_info(sdata, "associating with AP with corrupt %s\n", 5309 corrupt_type); 5310 } 5311 5312 return 0; 5313 err_clear: 5314 eth_zero_addr(ifmgd->bssid); 5315 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5316 ifmgd->assoc_data = NULL; 5317 err_free: 5318 kfree(assoc_data); 5319 return err; 5320 } 5321 5322 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5323 struct cfg80211_deauth_request *req) 5324 { 5325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5326 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5327 bool tx = !req->local_state_change; 5328 5329 if (ifmgd->auth_data && 5330 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5331 sdata_info(sdata, 5332 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5333 req->bssid, req->reason_code, 5334 ieee80211_get_reason_code_string(req->reason_code)); 5335 5336 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5337 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5338 IEEE80211_STYPE_DEAUTH, 5339 req->reason_code, tx, 5340 frame_buf); 5341 ieee80211_destroy_auth_data(sdata, false); 5342 ieee80211_report_disconnect(sdata, frame_buf, 5343 sizeof(frame_buf), true, 5344 req->reason_code); 5345 5346 return 0; 5347 } 5348 5349 if (ifmgd->assoc_data && 5350 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5351 sdata_info(sdata, 5352 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5353 req->bssid, req->reason_code, 5354 ieee80211_get_reason_code_string(req->reason_code)); 5355 5356 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5357 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5358 IEEE80211_STYPE_DEAUTH, 5359 req->reason_code, tx, 5360 frame_buf); 5361 ieee80211_destroy_assoc_data(sdata, false, true); 5362 ieee80211_report_disconnect(sdata, frame_buf, 5363 sizeof(frame_buf), true, 5364 req->reason_code); 5365 return 0; 5366 } 5367 5368 if (ifmgd->associated && 5369 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5370 sdata_info(sdata, 5371 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5372 req->bssid, req->reason_code, 5373 ieee80211_get_reason_code_string(req->reason_code)); 5374 5375 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5376 req->reason_code, tx, frame_buf); 5377 ieee80211_report_disconnect(sdata, frame_buf, 5378 sizeof(frame_buf), true, 5379 req->reason_code); 5380 return 0; 5381 } 5382 5383 return -ENOTCONN; 5384 } 5385 5386 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5387 struct cfg80211_disassoc_request *req) 5388 { 5389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5390 u8 bssid[ETH_ALEN]; 5391 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5392 5393 /* 5394 * cfg80211 should catch this ... but it's racy since 5395 * we can receive a disassoc frame, process it, hand it 5396 * to cfg80211 while that's in a locked section already 5397 * trying to tell us that the user wants to disconnect. 5398 */ 5399 if (ifmgd->associated != req->bss) 5400 return -ENOLINK; 5401 5402 sdata_info(sdata, 5403 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5404 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5405 5406 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5407 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5408 req->reason_code, !req->local_state_change, 5409 frame_buf); 5410 5411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5412 req->reason_code); 5413 5414 return 0; 5415 } 5416 5417 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5418 { 5419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5420 5421 /* 5422 * Make sure some work items will not run after this, 5423 * they will not do anything but might not have been 5424 * cancelled when disconnecting. 5425 */ 5426 cancel_work_sync(&ifmgd->monitor_work); 5427 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5428 cancel_work_sync(&ifmgd->request_smps_work); 5429 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5430 cancel_work_sync(&ifmgd->chswitch_work); 5431 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5432 5433 sdata_lock(sdata); 5434 if (ifmgd->assoc_data) { 5435 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5436 ieee80211_destroy_assoc_data(sdata, false, false); 5437 cfg80211_assoc_timeout(sdata->dev, bss); 5438 } 5439 if (ifmgd->auth_data) 5440 ieee80211_destroy_auth_data(sdata, false); 5441 spin_lock_bh(&ifmgd->teardown_lock); 5442 if (ifmgd->teardown_skb) { 5443 kfree_skb(ifmgd->teardown_skb); 5444 ifmgd->teardown_skb = NULL; 5445 ifmgd->orig_teardown_skb = NULL; 5446 } 5447 spin_unlock_bh(&ifmgd->teardown_lock); 5448 del_timer_sync(&ifmgd->timer); 5449 sdata_unlock(sdata); 5450 } 5451 5452 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5453 enum nl80211_cqm_rssi_threshold_event rssi_event, 5454 s32 rssi_level, 5455 gfp_t gfp) 5456 { 5457 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5458 5459 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5460 5461 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5462 } 5463 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5464 5465 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5466 { 5467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5468 5469 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5470 5471 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5472 } 5473 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5474