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_MAX_TRIES 3 40 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * We can have multiple work items (and connection probing) 93 * scheduling this timer, but we need to take care to only 94 * reschedule it when it should fire _earlier_ than it was 95 * asked for before, or if it's not pending right now. This 96 * function ensures that. Note that it then is required to 97 * run this function for all timeouts after the first one 98 * has happened -- the work that runs from this timer will 99 * do that. 100 */ 101 static void run_again(struct ieee80211_sub_if_data *sdata, 102 unsigned long timeout) 103 { 104 sdata_assert_lock(sdata); 105 106 if (!timer_pending(&sdata->u.mgd.timer) || 107 time_before(timeout, sdata->u.mgd.timer.expires)) 108 mod_timer(&sdata->u.mgd.timer, timeout); 109 } 110 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 112 { 113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 114 return; 115 116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 117 return; 118 119 mod_timer(&sdata->u.mgd.bcn_mon_timer, 120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 121 } 122 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 124 { 125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 126 127 if (unlikely(!ifmgd->associated)) 128 return; 129 130 if (ifmgd->probe_send_count) 131 ifmgd->probe_send_count = 0; 132 133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 134 return; 135 136 mod_timer(&ifmgd->conn_mon_timer, 137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 138 } 139 140 static int ecw2cw(int ecw) 141 { 142 return (1 << ecw) - 1; 143 } 144 145 static u32 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 147 struct ieee80211_supported_band *sband, 148 struct ieee80211_channel *channel, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->center_freq2 = 0; 165 166 if (!ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 174 channel->band); 175 /* check that channel matches the right operating channel */ 176 if (!tracking && channel->center_freq != ht_cfreq) { 177 /* 178 * It's possible that some APs are confused here; 179 * Netgear WNDR3700 sometimes reports 4 higher than 180 * the actual channel in association responses, but 181 * since we look at probe response/beacon data here 182 * it should be OK. 183 */ 184 sdata_info(sdata, 185 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 186 channel->center_freq, ht_cfreq, 187 ht_oper->primary_chan, channel->band); 188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 189 goto out; 190 } 191 192 /* check 40 MHz support, if we have it */ 193 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 194 ieee80211_chandef_ht_oper(ht_oper, chandef); 195 } else { 196 /* 40 MHz (and 80 MHz) must be supported for VHT */ 197 ret = IEEE80211_STA_DISABLE_VHT; 198 /* also mark 40 MHz disabled */ 199 ret |= IEEE80211_STA_DISABLE_40MHZ; 200 goto out; 201 } 202 203 if (!vht_oper || !sband->vht_cap.vht_supported) { 204 ret = IEEE80211_STA_DISABLE_VHT; 205 goto out; 206 } 207 208 vht_chandef = *chandef; 209 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 210 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 211 sdata_info(sdata, 212 "AP VHT information is invalid, disable VHT\n"); 213 ret = IEEE80211_STA_DISABLE_VHT; 214 goto out; 215 } 216 217 if (!cfg80211_chandef_valid(&vht_chandef)) { 218 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 219 sdata_info(sdata, 220 "AP VHT information is invalid, disable VHT\n"); 221 ret = IEEE80211_STA_DISABLE_VHT; 222 goto out; 223 } 224 225 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 226 ret = 0; 227 goto out; 228 } 229 230 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 232 sdata_info(sdata, 233 "AP VHT information doesn't match HT, disable VHT\n"); 234 ret = IEEE80211_STA_DISABLE_VHT; 235 goto out; 236 } 237 238 *chandef = vht_chandef; 239 240 ret = 0; 241 242 out: 243 /* 244 * When tracking the current AP, don't do any further checks if the 245 * new chandef is identical to the one we're currently using for the 246 * connection. This keeps us from playing ping-pong with regulatory, 247 * without it the following can happen (for example): 248 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 249 * - AP advertises regdom US 250 * - CRDA loads regdom US with 80 MHz prohibited (old database) 251 * - the code below detects an unsupported channel, downgrades, and 252 * we disconnect from the AP in the caller 253 * - disconnect causes CRDA to reload world regdomain and the game 254 * starts anew. 255 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 256 * 257 * It seems possible that there are still scenarios with CSA or real 258 * bandwidth changes where a this could happen, but those cases are 259 * less common and wouldn't completely prevent using the AP. 260 */ 261 if (tracking && 262 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 263 return ret; 264 265 /* don't print the message below for VHT mismatch if VHT is disabled */ 266 if (ret & IEEE80211_STA_DISABLE_VHT) 267 vht_chandef = *chandef; 268 269 /* 270 * Ignore the DISABLED flag when we're already connected and only 271 * tracking the APs beacon for bandwidth changes - otherwise we 272 * might get disconnected here if we connect to an AP, update our 273 * regulatory information based on the AP's country IE and the 274 * information we have is wrong/outdated and disables the channel 275 * that we're actually using for the connection to the AP. 276 */ 277 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 278 tracking ? 0 : 279 IEEE80211_CHAN_DISABLED)) { 280 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 281 ret = IEEE80211_STA_DISABLE_HT | 282 IEEE80211_STA_DISABLE_VHT; 283 break; 284 } 285 286 ret |= ieee80211_chandef_downgrade(chandef); 287 } 288 289 if (chandef->width != vht_chandef.width && !tracking) 290 sdata_info(sdata, 291 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 292 293 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 294 return ret; 295 } 296 297 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 298 struct sta_info *sta, 299 const struct ieee80211_ht_cap *ht_cap, 300 const struct ieee80211_ht_operation *ht_oper, 301 const struct ieee80211_vht_operation *vht_oper, 302 const u8 *bssid, u32 *changed) 303 { 304 struct ieee80211_local *local = sdata->local; 305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 306 struct ieee80211_supported_band *sband; 307 struct ieee80211_channel *chan; 308 struct cfg80211_chan_def chandef; 309 u16 ht_opmode; 310 u32 flags; 311 enum ieee80211_sta_rx_bandwidth new_sta_bw; 312 int ret; 313 314 /* if HT was/is disabled, don't track any bandwidth changes */ 315 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 316 return 0; 317 318 /* don't check VHT if we associated as non-VHT station */ 319 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 320 vht_oper = NULL; 321 322 if (WARN_ON_ONCE(!sta)) 323 return -EINVAL; 324 325 /* 326 * if bss configuration changed store the new one - 327 * this may be applicable even if channel is identical 328 */ 329 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 330 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 331 *changed |= BSS_CHANGED_HT; 332 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 333 } 334 335 chan = sdata->vif.bss_conf.chandef.chan; 336 sband = local->hw.wiphy->bands[chan->band]; 337 338 /* calculate new channel (type) based on HT/VHT operation IEs */ 339 flags = ieee80211_determine_chantype(sdata, sband, chan, 340 ht_oper, vht_oper, 341 &chandef, true); 342 343 /* 344 * Downgrade the new channel if we associated with restricted 345 * capabilities. For example, if we associated as a 20 MHz STA 346 * to a 40 MHz AP (due to regulatory, capabilities or config 347 * reasons) then switching to a 40 MHz channel now won't do us 348 * any good -- we couldn't use it with the AP. 349 */ 350 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 351 chandef.width == NL80211_CHAN_WIDTH_80P80) 352 flags |= ieee80211_chandef_downgrade(&chandef); 353 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 354 chandef.width == NL80211_CHAN_WIDTH_160) 355 flags |= ieee80211_chandef_downgrade(&chandef); 356 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 357 chandef.width > NL80211_CHAN_WIDTH_20) 358 flags |= ieee80211_chandef_downgrade(&chandef); 359 360 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 361 return 0; 362 363 sdata_info(sdata, 364 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 365 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 366 chandef.center_freq1, chandef.center_freq2); 367 368 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 369 IEEE80211_STA_DISABLE_VHT | 370 IEEE80211_STA_DISABLE_40MHZ | 371 IEEE80211_STA_DISABLE_80P80MHZ | 372 IEEE80211_STA_DISABLE_160MHZ)) || 373 !cfg80211_chandef_valid(&chandef)) { 374 sdata_info(sdata, 375 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 376 ifmgd->bssid); 377 return -EINVAL; 378 } 379 380 switch (chandef.width) { 381 case NL80211_CHAN_WIDTH_20_NOHT: 382 case NL80211_CHAN_WIDTH_20: 383 new_sta_bw = IEEE80211_STA_RX_BW_20; 384 break; 385 case NL80211_CHAN_WIDTH_40: 386 new_sta_bw = IEEE80211_STA_RX_BW_40; 387 break; 388 case NL80211_CHAN_WIDTH_80: 389 new_sta_bw = IEEE80211_STA_RX_BW_80; 390 break; 391 case NL80211_CHAN_WIDTH_80P80: 392 case NL80211_CHAN_WIDTH_160: 393 new_sta_bw = IEEE80211_STA_RX_BW_160; 394 break; 395 default: 396 return -EINVAL; 397 } 398 399 if (new_sta_bw > sta->cur_max_bandwidth) 400 new_sta_bw = sta->cur_max_bandwidth; 401 402 if (new_sta_bw < sta->sta.bandwidth) { 403 sta->sta.bandwidth = new_sta_bw; 404 rate_control_rate_update(local, sband, sta, 405 IEEE80211_RC_BW_CHANGED); 406 } 407 408 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 409 if (ret) { 410 sdata_info(sdata, 411 "AP %pM changed bandwidth to incompatible one - disconnect\n", 412 ifmgd->bssid); 413 return ret; 414 } 415 416 if (new_sta_bw > sta->sta.bandwidth) { 417 sta->sta.bandwidth = new_sta_bw; 418 rate_control_rate_update(local, sband, sta, 419 IEEE80211_RC_BW_CHANGED); 420 } 421 422 return 0; 423 } 424 425 /* frame sending functions */ 426 427 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 428 struct sk_buff *skb, u8 ap_ht_param, 429 struct ieee80211_supported_band *sband, 430 struct ieee80211_channel *channel, 431 enum ieee80211_smps_mode smps) 432 { 433 u8 *pos; 434 u32 flags = channel->flags; 435 u16 cap; 436 struct ieee80211_sta_ht_cap ht_cap; 437 438 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 439 440 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 441 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 442 443 /* determine capability flags */ 444 cap = ht_cap.cap; 445 446 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 447 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 448 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 449 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 450 cap &= ~IEEE80211_HT_CAP_SGI_40; 451 } 452 break; 453 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 454 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 455 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 456 cap &= ~IEEE80211_HT_CAP_SGI_40; 457 } 458 break; 459 } 460 461 /* 462 * If 40 MHz was disabled associate as though we weren't 463 * capable of 40 MHz -- some broken APs will never fall 464 * back to trying to transmit in 20 MHz. 465 */ 466 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 467 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 468 cap &= ~IEEE80211_HT_CAP_SGI_40; 469 } 470 471 /* set SM PS mode properly */ 472 cap &= ~IEEE80211_HT_CAP_SM_PS; 473 switch (smps) { 474 case IEEE80211_SMPS_AUTOMATIC: 475 case IEEE80211_SMPS_NUM_MODES: 476 WARN_ON(1); 477 /* fall through */ 478 case IEEE80211_SMPS_OFF: 479 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 480 IEEE80211_HT_CAP_SM_PS_SHIFT; 481 break; 482 case IEEE80211_SMPS_STATIC: 483 cap |= WLAN_HT_CAP_SM_PS_STATIC << 484 IEEE80211_HT_CAP_SM_PS_SHIFT; 485 break; 486 case IEEE80211_SMPS_DYNAMIC: 487 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 488 IEEE80211_HT_CAP_SM_PS_SHIFT; 489 break; 490 } 491 492 /* reserve and fill IE */ 493 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 494 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 495 } 496 497 /* This function determines vht capability flags for the association 498 * and builds the IE. 499 * Note - the function may set the owner of the MU-MIMO capability 500 */ 501 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 502 struct sk_buff *skb, 503 struct ieee80211_supported_band *sband, 504 struct ieee80211_vht_cap *ap_vht_cap) 505 { 506 struct ieee80211_local *local = sdata->local; 507 u8 *pos; 508 u32 cap; 509 struct ieee80211_sta_vht_cap vht_cap; 510 u32 mask, ap_bf_sts, our_bf_sts; 511 512 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 513 514 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 515 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 516 517 /* determine capability flags */ 518 cap = vht_cap.cap; 519 520 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 521 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 522 523 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 524 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 525 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 526 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 527 } 528 529 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 530 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 531 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 532 } 533 534 /* 535 * Some APs apparently get confused if our capabilities are better 536 * than theirs, so restrict what we advertise in the assoc request. 537 */ 538 if (!(ap_vht_cap->vht_cap_info & 539 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 540 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 541 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 542 else if (!(ap_vht_cap->vht_cap_info & 543 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 544 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 545 546 /* 547 * If some other vif is using the MU-MIMO capablity we cannot associate 548 * using MU-MIMO - this will lead to contradictions in the group-id 549 * mechanism. 550 * Ownership is defined since association request, in order to avoid 551 * simultaneous associations with MU-MIMO. 552 */ 553 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 554 bool disable_mu_mimo = false; 555 struct ieee80211_sub_if_data *other; 556 557 list_for_each_entry_rcu(other, &local->interfaces, list) { 558 if (other->vif.mu_mimo_owner) { 559 disable_mu_mimo = true; 560 break; 561 } 562 } 563 if (disable_mu_mimo) 564 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 565 else 566 sdata->vif.mu_mimo_owner = true; 567 } 568 569 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 570 571 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 572 our_bf_sts = cap & mask; 573 574 if (ap_bf_sts < our_bf_sts) { 575 cap &= ~mask; 576 cap |= ap_bf_sts; 577 } 578 579 /* reserve and fill IE */ 580 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 581 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 582 } 583 584 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 585 { 586 struct ieee80211_local *local = sdata->local; 587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 588 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 589 struct sk_buff *skb; 590 struct ieee80211_mgmt *mgmt; 591 u8 *pos, qos_info; 592 size_t offset = 0, noffset; 593 int i, count, rates_len, supp_rates_len, shift; 594 u16 capab; 595 struct ieee80211_supported_band *sband; 596 struct ieee80211_chanctx_conf *chanctx_conf; 597 struct ieee80211_channel *chan; 598 u32 rates = 0; 599 600 sdata_assert_lock(sdata); 601 602 rcu_read_lock(); 603 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 604 if (WARN_ON(!chanctx_conf)) { 605 rcu_read_unlock(); 606 return; 607 } 608 chan = chanctx_conf->def.chan; 609 rcu_read_unlock(); 610 sband = local->hw.wiphy->bands[chan->band]; 611 shift = ieee80211_vif_get_shift(&sdata->vif); 612 613 if (assoc_data->supp_rates_len) { 614 /* 615 * Get all rates supported by the device and the AP as 616 * some APs don't like getting a superset of their rates 617 * in the association request (e.g. D-Link DAP 1353 in 618 * b-only mode)... 619 */ 620 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 621 assoc_data->supp_rates, 622 assoc_data->supp_rates_len, 623 &rates); 624 } else { 625 /* 626 * In case AP not provide any supported rates information 627 * before association, we send information element(s) with 628 * all rates that we support. 629 */ 630 rates_len = 0; 631 for (i = 0; i < sband->n_bitrates; i++) { 632 rates |= BIT(i); 633 rates_len++; 634 } 635 } 636 637 skb = alloc_skb(local->hw.extra_tx_headroom + 638 sizeof(*mgmt) + /* bit too much but doesn't matter */ 639 2 + assoc_data->ssid_len + /* SSID */ 640 4 + rates_len + /* (extended) rates */ 641 4 + /* power capability */ 642 2 + 2 * sband->n_channels + /* supported channels */ 643 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 644 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 645 assoc_data->ie_len + /* extra IEs */ 646 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 647 9, /* WMM */ 648 GFP_KERNEL); 649 if (!skb) 650 return; 651 652 skb_reserve(skb, local->hw.extra_tx_headroom); 653 654 capab = WLAN_CAPABILITY_ESS; 655 656 if (sband->band == NL80211_BAND_2GHZ) { 657 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 658 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 659 } 660 661 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 662 capab |= WLAN_CAPABILITY_PRIVACY; 663 664 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 665 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 666 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 667 668 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 669 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 670 671 mgmt = skb_put_zero(skb, 24); 672 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 673 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 674 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 675 676 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 677 skb_put(skb, 10); 678 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 679 IEEE80211_STYPE_REASSOC_REQ); 680 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 681 mgmt->u.reassoc_req.listen_interval = 682 cpu_to_le16(local->hw.conf.listen_interval); 683 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 684 ETH_ALEN); 685 } else { 686 skb_put(skb, 4); 687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 688 IEEE80211_STYPE_ASSOC_REQ); 689 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 690 mgmt->u.assoc_req.listen_interval = 691 cpu_to_le16(local->hw.conf.listen_interval); 692 } 693 694 /* SSID */ 695 pos = skb_put(skb, 2 + assoc_data->ssid_len); 696 *pos++ = WLAN_EID_SSID; 697 *pos++ = assoc_data->ssid_len; 698 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 699 700 /* add all rates which were marked to be used above */ 701 supp_rates_len = rates_len; 702 if (supp_rates_len > 8) 703 supp_rates_len = 8; 704 705 pos = skb_put(skb, supp_rates_len + 2); 706 *pos++ = WLAN_EID_SUPP_RATES; 707 *pos++ = supp_rates_len; 708 709 count = 0; 710 for (i = 0; i < sband->n_bitrates; i++) { 711 if (BIT(i) & rates) { 712 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 713 5 * (1 << shift)); 714 *pos++ = (u8) rate; 715 if (++count == 8) 716 break; 717 } 718 } 719 720 if (rates_len > count) { 721 pos = skb_put(skb, rates_len - count + 2); 722 *pos++ = WLAN_EID_EXT_SUPP_RATES; 723 *pos++ = rates_len - count; 724 725 for (i++; i < sband->n_bitrates; i++) { 726 if (BIT(i) & rates) { 727 int rate; 728 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 729 5 * (1 << shift)); 730 *pos++ = (u8) rate; 731 } 732 } 733 } 734 735 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 736 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 737 pos = skb_put(skb, 4); 738 *pos++ = WLAN_EID_PWR_CAPABILITY; 739 *pos++ = 2; 740 *pos++ = 0; /* min tx power */ 741 /* max tx power */ 742 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 743 } 744 745 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 746 /* TODO: get this in reg domain format */ 747 pos = skb_put(skb, 2 * sband->n_channels + 2); 748 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 749 *pos++ = 2 * sband->n_channels; 750 for (i = 0; i < sband->n_channels; i++) { 751 *pos++ = ieee80211_frequency_to_channel( 752 sband->channels[i].center_freq); 753 *pos++ = 1; /* one channel in the subband*/ 754 } 755 } 756 757 /* if present, add any custom IEs that go before HT */ 758 if (assoc_data->ie_len) { 759 static const u8 before_ht[] = { 760 WLAN_EID_SSID, 761 WLAN_EID_SUPP_RATES, 762 WLAN_EID_EXT_SUPP_RATES, 763 WLAN_EID_PWR_CAPABILITY, 764 WLAN_EID_SUPPORTED_CHANNELS, 765 WLAN_EID_RSN, 766 WLAN_EID_QOS_CAPA, 767 WLAN_EID_RRM_ENABLED_CAPABILITIES, 768 WLAN_EID_MOBILITY_DOMAIN, 769 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 770 WLAN_EID_RIC_DATA, /* reassoc only */ 771 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 772 }; 773 static const u8 after_ric[] = { 774 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 775 WLAN_EID_HT_CAPABILITY, 776 WLAN_EID_BSS_COEX_2040, 777 /* luckily this is almost always there */ 778 WLAN_EID_EXT_CAPABILITY, 779 WLAN_EID_QOS_TRAFFIC_CAPA, 780 WLAN_EID_TIM_BCAST_REQ, 781 WLAN_EID_INTERWORKING, 782 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 783 WLAN_EID_VHT_CAPABILITY, 784 WLAN_EID_OPMODE_NOTIF, 785 }; 786 787 noffset = ieee80211_ie_split_ric(assoc_data->ie, 788 assoc_data->ie_len, 789 before_ht, 790 ARRAY_SIZE(before_ht), 791 after_ric, 792 ARRAY_SIZE(after_ric), 793 offset); 794 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 795 offset = noffset; 796 } 797 798 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 799 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 800 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 801 802 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 803 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 804 sband, chan, sdata->smps_mode); 805 806 /* if present, add any custom IEs that go before VHT */ 807 if (assoc_data->ie_len) { 808 static const u8 before_vht[] = { 809 /* 810 * no need to list the ones split off before HT 811 * or generated here 812 */ 813 WLAN_EID_BSS_COEX_2040, 814 WLAN_EID_EXT_CAPABILITY, 815 WLAN_EID_QOS_TRAFFIC_CAPA, 816 WLAN_EID_TIM_BCAST_REQ, 817 WLAN_EID_INTERWORKING, 818 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 819 }; 820 821 /* RIC already taken above, so no need to handle here anymore */ 822 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 823 before_vht, ARRAY_SIZE(before_vht), 824 offset); 825 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 826 offset = noffset; 827 } 828 829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 830 ieee80211_add_vht_ie(sdata, skb, sband, 831 &assoc_data->ap_vht_cap); 832 833 /* if present, add any custom non-vendor IEs that go after HT */ 834 if (assoc_data->ie_len) { 835 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 836 assoc_data->ie_len, 837 offset); 838 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 839 offset = noffset; 840 } 841 842 if (assoc_data->wmm) { 843 if (assoc_data->uapsd) { 844 qos_info = ifmgd->uapsd_queues; 845 qos_info |= (ifmgd->uapsd_max_sp_len << 846 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 847 } else { 848 qos_info = 0; 849 } 850 851 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 852 } 853 854 /* add any remaining custom (i.e. vendor specific here) IEs */ 855 if (assoc_data->ie_len) { 856 noffset = assoc_data->ie_len; 857 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 858 } 859 860 if (assoc_data->fils_kek_len && 861 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 862 dev_kfree_skb(skb); 863 return; 864 } 865 866 drv_mgd_prepare_tx(local, sdata); 867 868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 869 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 871 IEEE80211_TX_INTFL_MLME_CONN_TX; 872 ieee80211_tx_skb(sdata, skb); 873 } 874 875 void ieee80211_send_pspoll(struct ieee80211_local *local, 876 struct ieee80211_sub_if_data *sdata) 877 { 878 struct ieee80211_pspoll *pspoll; 879 struct sk_buff *skb; 880 881 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 882 if (!skb) 883 return; 884 885 pspoll = (struct ieee80211_pspoll *) skb->data; 886 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 887 888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 889 ieee80211_tx_skb(sdata, skb); 890 } 891 892 void ieee80211_send_nullfunc(struct ieee80211_local *local, 893 struct ieee80211_sub_if_data *sdata, 894 bool powersave) 895 { 896 struct sk_buff *skb; 897 struct ieee80211_hdr_3addr *nullfunc; 898 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 899 900 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, true); 901 if (!skb) 902 return; 903 904 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 905 if (powersave) 906 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 907 908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 909 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 910 911 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 913 914 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 916 917 ieee80211_tx_skb(sdata, skb); 918 } 919 920 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 921 struct ieee80211_sub_if_data *sdata) 922 { 923 struct sk_buff *skb; 924 struct ieee80211_hdr *nullfunc; 925 __le16 fc; 926 927 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 928 return; 929 930 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 931 if (!skb) 932 return; 933 934 skb_reserve(skb, local->hw.extra_tx_headroom); 935 936 nullfunc = skb_put_zero(skb, 30); 937 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 938 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 939 nullfunc->frame_control = fc; 940 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 941 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 942 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 943 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 944 945 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 946 ieee80211_tx_skb(sdata, skb); 947 } 948 949 /* spectrum management related things */ 950 static void ieee80211_chswitch_work(struct work_struct *work) 951 { 952 struct ieee80211_sub_if_data *sdata = 953 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 954 struct ieee80211_local *local = sdata->local; 955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 956 int ret; 957 958 if (!ieee80211_sdata_running(sdata)) 959 return; 960 961 sdata_lock(sdata); 962 mutex_lock(&local->mtx); 963 mutex_lock(&local->chanctx_mtx); 964 965 if (!ifmgd->associated) 966 goto out; 967 968 if (!sdata->vif.csa_active) 969 goto out; 970 971 /* 972 * using reservation isn't immediate as it may be deferred until later 973 * with multi-vif. once reservation is complete it will re-schedule the 974 * work with no reserved_chanctx so verify chandef to check if it 975 * completed successfully 976 */ 977 978 if (sdata->reserved_chanctx) { 979 /* 980 * with multi-vif csa driver may call ieee80211_csa_finish() 981 * many times while waiting for other interfaces to use their 982 * reservations 983 */ 984 if (sdata->reserved_ready) 985 goto out; 986 987 ret = ieee80211_vif_use_reserved_context(sdata); 988 if (ret) { 989 sdata_info(sdata, 990 "failed to use reserved channel context, disconnecting (err=%d)\n", 991 ret); 992 ieee80211_queue_work(&sdata->local->hw, 993 &ifmgd->csa_connection_drop_work); 994 goto out; 995 } 996 997 goto out; 998 } 999 1000 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1001 &sdata->csa_chandef)) { 1002 sdata_info(sdata, 1003 "failed to finalize channel switch, disconnecting\n"); 1004 ieee80211_queue_work(&sdata->local->hw, 1005 &ifmgd->csa_connection_drop_work); 1006 goto out; 1007 } 1008 1009 /* XXX: shouldn't really modify cfg80211-owned data! */ 1010 ifmgd->associated->channel = sdata->csa_chandef.chan; 1011 1012 ifmgd->csa_waiting_bcn = true; 1013 1014 ieee80211_sta_reset_beacon_monitor(sdata); 1015 ieee80211_sta_reset_conn_monitor(sdata); 1016 1017 out: 1018 mutex_unlock(&local->chanctx_mtx); 1019 mutex_unlock(&local->mtx); 1020 sdata_unlock(sdata); 1021 } 1022 1023 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1024 { 1025 struct ieee80211_local *local = sdata->local; 1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1027 int ret; 1028 1029 sdata_assert_lock(sdata); 1030 1031 WARN_ON(!sdata->vif.csa_active); 1032 1033 if (sdata->csa_block_tx) { 1034 ieee80211_wake_vif_queues(local, sdata, 1035 IEEE80211_QUEUE_STOP_REASON_CSA); 1036 sdata->csa_block_tx = false; 1037 } 1038 1039 sdata->vif.csa_active = false; 1040 ifmgd->csa_waiting_bcn = false; 1041 1042 ret = drv_post_channel_switch(sdata); 1043 if (ret) { 1044 sdata_info(sdata, 1045 "driver post channel switch failed, disconnecting\n"); 1046 ieee80211_queue_work(&local->hw, 1047 &ifmgd->csa_connection_drop_work); 1048 return; 1049 } 1050 1051 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1052 } 1053 1054 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1055 { 1056 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1058 1059 trace_api_chswitch_done(sdata, success); 1060 if (!success) { 1061 sdata_info(sdata, 1062 "driver channel switch failed, disconnecting\n"); 1063 ieee80211_queue_work(&sdata->local->hw, 1064 &ifmgd->csa_connection_drop_work); 1065 } else { 1066 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1067 } 1068 } 1069 EXPORT_SYMBOL(ieee80211_chswitch_done); 1070 1071 static void ieee80211_chswitch_timer(struct timer_list *t) 1072 { 1073 struct ieee80211_sub_if_data *sdata = 1074 from_timer(sdata, t, u.mgd.chswitch_timer); 1075 1076 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1077 } 1078 1079 static void 1080 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1081 u64 timestamp, u32 device_timestamp, 1082 struct ieee802_11_elems *elems, 1083 bool beacon) 1084 { 1085 struct ieee80211_local *local = sdata->local; 1086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1087 struct cfg80211_bss *cbss = ifmgd->associated; 1088 struct ieee80211_chanctx_conf *conf; 1089 struct ieee80211_chanctx *chanctx; 1090 enum nl80211_band current_band; 1091 struct ieee80211_csa_ie csa_ie; 1092 struct ieee80211_channel_switch ch_switch; 1093 int res; 1094 1095 sdata_assert_lock(sdata); 1096 1097 if (!cbss) 1098 return; 1099 1100 if (local->scanning) 1101 return; 1102 1103 /* disregard subsequent announcements if we are already processing */ 1104 if (sdata->vif.csa_active) 1105 return; 1106 1107 current_band = cbss->channel->band; 1108 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1109 ifmgd->flags, 1110 ifmgd->associated->bssid, &csa_ie); 1111 if (res < 0) 1112 ieee80211_queue_work(&local->hw, 1113 &ifmgd->csa_connection_drop_work); 1114 if (res) 1115 return; 1116 1117 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1118 IEEE80211_CHAN_DISABLED)) { 1119 sdata_info(sdata, 1120 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1121 ifmgd->associated->bssid, 1122 csa_ie.chandef.chan->center_freq, 1123 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1124 csa_ie.chandef.center_freq2); 1125 ieee80211_queue_work(&local->hw, 1126 &ifmgd->csa_connection_drop_work); 1127 return; 1128 } 1129 1130 if (cfg80211_chandef_identical(&csa_ie.chandef, 1131 &sdata->vif.bss_conf.chandef)) { 1132 if (ifmgd->csa_ignored_same_chan) 1133 return; 1134 sdata_info(sdata, 1135 "AP %pM tries to chanswitch to same channel, ignore\n", 1136 ifmgd->associated->bssid); 1137 ifmgd->csa_ignored_same_chan = true; 1138 return; 1139 } 1140 1141 /* 1142 * Drop all TDLS peers - either we disconnect or move to a different 1143 * channel from this point on. There's no telling what our peer will do. 1144 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1145 * have an incompatible wider chandef. 1146 */ 1147 ieee80211_teardown_tdls_peers(sdata); 1148 1149 mutex_lock(&local->mtx); 1150 mutex_lock(&local->chanctx_mtx); 1151 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1152 lockdep_is_held(&local->chanctx_mtx)); 1153 if (!conf) { 1154 sdata_info(sdata, 1155 "no channel context assigned to vif?, disconnecting\n"); 1156 goto drop_connection; 1157 } 1158 1159 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1160 1161 if (local->use_chanctx && 1162 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1163 sdata_info(sdata, 1164 "driver doesn't support chan-switch with channel contexts\n"); 1165 goto drop_connection; 1166 } 1167 1168 ch_switch.timestamp = timestamp; 1169 ch_switch.device_timestamp = device_timestamp; 1170 ch_switch.block_tx = csa_ie.mode; 1171 ch_switch.chandef = csa_ie.chandef; 1172 ch_switch.count = csa_ie.count; 1173 1174 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1175 sdata_info(sdata, 1176 "preparing for channel switch failed, disconnecting\n"); 1177 goto drop_connection; 1178 } 1179 1180 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1181 chanctx->mode, false); 1182 if (res) { 1183 sdata_info(sdata, 1184 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1185 res); 1186 goto drop_connection; 1187 } 1188 mutex_unlock(&local->chanctx_mtx); 1189 1190 sdata->vif.csa_active = true; 1191 sdata->csa_chandef = csa_ie.chandef; 1192 sdata->csa_block_tx = csa_ie.mode; 1193 ifmgd->csa_ignored_same_chan = false; 1194 1195 if (sdata->csa_block_tx) 1196 ieee80211_stop_vif_queues(local, sdata, 1197 IEEE80211_QUEUE_STOP_REASON_CSA); 1198 mutex_unlock(&local->mtx); 1199 1200 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1201 csa_ie.count); 1202 1203 if (local->ops->channel_switch) { 1204 /* use driver's channel switch callback */ 1205 drv_channel_switch(local, sdata, &ch_switch); 1206 return; 1207 } 1208 1209 /* channel switch handled in software */ 1210 if (csa_ie.count <= 1) 1211 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1212 else 1213 mod_timer(&ifmgd->chswitch_timer, 1214 TU_TO_EXP_TIME((csa_ie.count - 1) * 1215 cbss->beacon_interval)); 1216 return; 1217 drop_connection: 1218 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1219 mutex_unlock(&local->chanctx_mtx); 1220 mutex_unlock(&local->mtx); 1221 } 1222 1223 static bool 1224 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1225 struct ieee80211_channel *channel, 1226 const u8 *country_ie, u8 country_ie_len, 1227 const u8 *pwr_constr_elem, 1228 int *chan_pwr, int *pwr_reduction) 1229 { 1230 struct ieee80211_country_ie_triplet *triplet; 1231 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1232 int i, chan_increment; 1233 bool have_chan_pwr = false; 1234 1235 /* Invalid IE */ 1236 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1237 return false; 1238 1239 triplet = (void *)(country_ie + 3); 1240 country_ie_len -= 3; 1241 1242 switch (channel->band) { 1243 default: 1244 WARN_ON_ONCE(1); 1245 /* fall through */ 1246 case NL80211_BAND_2GHZ: 1247 case NL80211_BAND_60GHZ: 1248 chan_increment = 1; 1249 break; 1250 case NL80211_BAND_5GHZ: 1251 chan_increment = 4; 1252 break; 1253 } 1254 1255 /* find channel */ 1256 while (country_ie_len >= 3) { 1257 u8 first_channel = triplet->chans.first_channel; 1258 1259 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1260 goto next; 1261 1262 for (i = 0; i < triplet->chans.num_channels; i++) { 1263 if (first_channel + i * chan_increment == chan) { 1264 have_chan_pwr = true; 1265 *chan_pwr = triplet->chans.max_power; 1266 break; 1267 } 1268 } 1269 if (have_chan_pwr) 1270 break; 1271 1272 next: 1273 triplet++; 1274 country_ie_len -= 3; 1275 } 1276 1277 if (have_chan_pwr && pwr_constr_elem) 1278 *pwr_reduction = *pwr_constr_elem; 1279 else 1280 *pwr_reduction = 0; 1281 1282 return have_chan_pwr; 1283 } 1284 1285 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1286 struct ieee80211_channel *channel, 1287 const u8 *cisco_dtpc_ie, 1288 int *pwr_level) 1289 { 1290 /* From practical testing, the first data byte of the DTPC element 1291 * seems to contain the requested dBm level, and the CLI on Cisco 1292 * APs clearly state the range is -127 to 127 dBm, which indicates 1293 * a signed byte, although it seemingly never actually goes negative. 1294 * The other byte seems to always be zero. 1295 */ 1296 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1297 } 1298 1299 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1300 struct ieee80211_channel *channel, 1301 struct ieee80211_mgmt *mgmt, 1302 const u8 *country_ie, u8 country_ie_len, 1303 const u8 *pwr_constr_ie, 1304 const u8 *cisco_dtpc_ie) 1305 { 1306 bool has_80211h_pwr = false, has_cisco_pwr = false; 1307 int chan_pwr = 0, pwr_reduction_80211h = 0; 1308 int pwr_level_cisco, pwr_level_80211h; 1309 int new_ap_level; 1310 __le16 capab = mgmt->u.probe_resp.capab_info; 1311 1312 if (country_ie && 1313 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1314 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1315 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1316 sdata, channel, country_ie, country_ie_len, 1317 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1318 pwr_level_80211h = 1319 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1320 } 1321 1322 if (cisco_dtpc_ie) { 1323 ieee80211_find_cisco_dtpc( 1324 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1325 has_cisco_pwr = true; 1326 } 1327 1328 if (!has_80211h_pwr && !has_cisco_pwr) 1329 return 0; 1330 1331 /* If we have both 802.11h and Cisco DTPC, apply both limits 1332 * by picking the smallest of the two power levels advertised. 1333 */ 1334 if (has_80211h_pwr && 1335 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1336 new_ap_level = pwr_level_80211h; 1337 1338 if (sdata->ap_power_level == new_ap_level) 1339 return 0; 1340 1341 sdata_dbg(sdata, 1342 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1343 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1344 sdata->u.mgd.bssid); 1345 } else { /* has_cisco_pwr is always true here. */ 1346 new_ap_level = pwr_level_cisco; 1347 1348 if (sdata->ap_power_level == new_ap_level) 1349 return 0; 1350 1351 sdata_dbg(sdata, 1352 "Limiting TX power to %d dBm as advertised by %pM\n", 1353 pwr_level_cisco, sdata->u.mgd.bssid); 1354 } 1355 1356 sdata->ap_power_level = new_ap_level; 1357 if (__ieee80211_recalc_txpower(sdata)) 1358 return BSS_CHANGED_TXPOWER; 1359 return 0; 1360 } 1361 1362 /* powersave */ 1363 static void ieee80211_enable_ps(struct ieee80211_local *local, 1364 struct ieee80211_sub_if_data *sdata) 1365 { 1366 struct ieee80211_conf *conf = &local->hw.conf; 1367 1368 /* 1369 * If we are scanning right now then the parameters will 1370 * take effect when scan finishes. 1371 */ 1372 if (local->scanning) 1373 return; 1374 1375 if (conf->dynamic_ps_timeout > 0 && 1376 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1377 mod_timer(&local->dynamic_ps_timer, jiffies + 1378 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1379 } else { 1380 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1381 ieee80211_send_nullfunc(local, sdata, true); 1382 1383 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1384 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1385 return; 1386 1387 conf->flags |= IEEE80211_CONF_PS; 1388 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1389 } 1390 } 1391 1392 static void ieee80211_change_ps(struct ieee80211_local *local) 1393 { 1394 struct ieee80211_conf *conf = &local->hw.conf; 1395 1396 if (local->ps_sdata) { 1397 ieee80211_enable_ps(local, local->ps_sdata); 1398 } else if (conf->flags & IEEE80211_CONF_PS) { 1399 conf->flags &= ~IEEE80211_CONF_PS; 1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1401 del_timer_sync(&local->dynamic_ps_timer); 1402 cancel_work_sync(&local->dynamic_ps_enable_work); 1403 } 1404 } 1405 1406 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1407 { 1408 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1409 struct sta_info *sta = NULL; 1410 bool authorized = false; 1411 1412 if (!mgd->powersave) 1413 return false; 1414 1415 if (mgd->broken_ap) 1416 return false; 1417 1418 if (!mgd->associated) 1419 return false; 1420 1421 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1422 return false; 1423 1424 if (!mgd->have_beacon) 1425 return false; 1426 1427 rcu_read_lock(); 1428 sta = sta_info_get(sdata, mgd->bssid); 1429 if (sta) 1430 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1431 rcu_read_unlock(); 1432 1433 return authorized; 1434 } 1435 1436 /* need to hold RTNL or interface lock */ 1437 void ieee80211_recalc_ps(struct ieee80211_local *local) 1438 { 1439 struct ieee80211_sub_if_data *sdata, *found = NULL; 1440 int count = 0; 1441 int timeout; 1442 1443 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1444 local->ps_sdata = NULL; 1445 return; 1446 } 1447 1448 list_for_each_entry(sdata, &local->interfaces, list) { 1449 if (!ieee80211_sdata_running(sdata)) 1450 continue; 1451 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1452 /* If an AP vif is found, then disable PS 1453 * by setting the count to zero thereby setting 1454 * ps_sdata to NULL. 1455 */ 1456 count = 0; 1457 break; 1458 } 1459 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1460 continue; 1461 found = sdata; 1462 count++; 1463 } 1464 1465 if (count == 1 && ieee80211_powersave_allowed(found)) { 1466 u8 dtimper = found->u.mgd.dtim_period; 1467 1468 timeout = local->dynamic_ps_forced_timeout; 1469 if (timeout < 0) 1470 timeout = 100; 1471 local->hw.conf.dynamic_ps_timeout = timeout; 1472 1473 /* If the TIM IE is invalid, pretend the value is 1 */ 1474 if (!dtimper) 1475 dtimper = 1; 1476 1477 local->hw.conf.ps_dtim_period = dtimper; 1478 local->ps_sdata = found; 1479 } else { 1480 local->ps_sdata = NULL; 1481 } 1482 1483 ieee80211_change_ps(local); 1484 } 1485 1486 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1487 { 1488 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1489 1490 if (sdata->vif.bss_conf.ps != ps_allowed) { 1491 sdata->vif.bss_conf.ps = ps_allowed; 1492 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1493 } 1494 } 1495 1496 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1497 { 1498 struct ieee80211_local *local = 1499 container_of(work, struct ieee80211_local, 1500 dynamic_ps_disable_work); 1501 1502 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1503 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1504 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1505 } 1506 1507 ieee80211_wake_queues_by_reason(&local->hw, 1508 IEEE80211_MAX_QUEUE_MAP, 1509 IEEE80211_QUEUE_STOP_REASON_PS, 1510 false); 1511 } 1512 1513 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1514 { 1515 struct ieee80211_local *local = 1516 container_of(work, struct ieee80211_local, 1517 dynamic_ps_enable_work); 1518 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1519 struct ieee80211_if_managed *ifmgd; 1520 unsigned long flags; 1521 int q; 1522 1523 /* can only happen when PS was just disabled anyway */ 1524 if (!sdata) 1525 return; 1526 1527 ifmgd = &sdata->u.mgd; 1528 1529 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1530 return; 1531 1532 if (local->hw.conf.dynamic_ps_timeout > 0) { 1533 /* don't enter PS if TX frames are pending */ 1534 if (drv_tx_frames_pending(local)) { 1535 mod_timer(&local->dynamic_ps_timer, jiffies + 1536 msecs_to_jiffies( 1537 local->hw.conf.dynamic_ps_timeout)); 1538 return; 1539 } 1540 1541 /* 1542 * transmission can be stopped by others which leads to 1543 * dynamic_ps_timer expiry. Postpone the ps timer if it 1544 * is not the actual idle state. 1545 */ 1546 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1547 for (q = 0; q < local->hw.queues; q++) { 1548 if (local->queue_stop_reasons[q]) { 1549 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1550 flags); 1551 mod_timer(&local->dynamic_ps_timer, jiffies + 1552 msecs_to_jiffies( 1553 local->hw.conf.dynamic_ps_timeout)); 1554 return; 1555 } 1556 } 1557 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1558 } 1559 1560 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1561 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1562 if (drv_tx_frames_pending(local)) { 1563 mod_timer(&local->dynamic_ps_timer, jiffies + 1564 msecs_to_jiffies( 1565 local->hw.conf.dynamic_ps_timeout)); 1566 } else { 1567 ieee80211_send_nullfunc(local, sdata, true); 1568 /* Flush to get the tx status of nullfunc frame */ 1569 ieee80211_flush_queues(local, sdata, false); 1570 } 1571 } 1572 1573 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1574 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1575 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1576 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1577 local->hw.conf.flags |= IEEE80211_CONF_PS; 1578 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1579 } 1580 } 1581 1582 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1583 { 1584 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1585 1586 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1587 } 1588 1589 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1590 { 1591 struct delayed_work *delayed_work = to_delayed_work(work); 1592 struct ieee80211_sub_if_data *sdata = 1593 container_of(delayed_work, struct ieee80211_sub_if_data, 1594 dfs_cac_timer_work); 1595 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1596 1597 mutex_lock(&sdata->local->mtx); 1598 if (sdata->wdev.cac_started) { 1599 ieee80211_vif_release_channel(sdata); 1600 cfg80211_cac_event(sdata->dev, &chandef, 1601 NL80211_RADAR_CAC_FINISHED, 1602 GFP_KERNEL); 1603 } 1604 mutex_unlock(&sdata->local->mtx); 1605 } 1606 1607 static bool 1608 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1609 { 1610 struct ieee80211_local *local = sdata->local; 1611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1612 bool ret = false; 1613 int ac; 1614 1615 if (local->hw.queues < IEEE80211_NUM_ACS) 1616 return false; 1617 1618 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1619 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1620 int non_acm_ac; 1621 unsigned long now = jiffies; 1622 1623 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1624 tx_tspec->admitted_time && 1625 time_after(now, tx_tspec->time_slice_start + HZ)) { 1626 tx_tspec->consumed_tx_time = 0; 1627 tx_tspec->time_slice_start = now; 1628 1629 if (tx_tspec->downgraded) 1630 tx_tspec->action = 1631 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1632 } 1633 1634 switch (tx_tspec->action) { 1635 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1636 /* take the original parameters */ 1637 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1638 sdata_err(sdata, 1639 "failed to set TX queue parameters for queue %d\n", 1640 ac); 1641 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1642 tx_tspec->downgraded = false; 1643 ret = true; 1644 break; 1645 case TX_TSPEC_ACTION_DOWNGRADE: 1646 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1647 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1648 ret = true; 1649 break; 1650 } 1651 /* downgrade next lower non-ACM AC */ 1652 for (non_acm_ac = ac + 1; 1653 non_acm_ac < IEEE80211_NUM_ACS; 1654 non_acm_ac++) 1655 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1656 break; 1657 /* Usually the loop will result in using BK even if it 1658 * requires admission control, but such a configuration 1659 * makes no sense and we have to transmit somehow - the 1660 * AC selection does the same thing. 1661 * If we started out trying to downgrade from BK, then 1662 * the extra condition here might be needed. 1663 */ 1664 if (non_acm_ac >= IEEE80211_NUM_ACS) 1665 non_acm_ac = IEEE80211_AC_BK; 1666 if (drv_conf_tx(local, sdata, ac, 1667 &sdata->tx_conf[non_acm_ac])) 1668 sdata_err(sdata, 1669 "failed to set TX queue parameters for queue %d\n", 1670 ac); 1671 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1672 ret = true; 1673 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1674 tx_tspec->time_slice_start + HZ - now + 1); 1675 break; 1676 case TX_TSPEC_ACTION_NONE: 1677 /* nothing now */ 1678 break; 1679 } 1680 } 1681 1682 return ret; 1683 } 1684 1685 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1686 { 1687 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1688 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1689 } 1690 1691 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1692 { 1693 struct ieee80211_sub_if_data *sdata; 1694 1695 sdata = container_of(work, struct ieee80211_sub_if_data, 1696 u.mgd.tx_tspec_wk.work); 1697 ieee80211_sta_handle_tspec_ac_params(sdata); 1698 } 1699 1700 /* MLME */ 1701 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1702 struct ieee80211_sub_if_data *sdata, 1703 const u8 *wmm_param, size_t wmm_param_len) 1704 { 1705 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1707 size_t left; 1708 int count, ac; 1709 const u8 *pos; 1710 u8 uapsd_queues = 0; 1711 1712 if (!local->ops->conf_tx) 1713 return false; 1714 1715 if (local->hw.queues < IEEE80211_NUM_ACS) 1716 return false; 1717 1718 if (!wmm_param) 1719 return false; 1720 1721 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1722 return false; 1723 1724 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1725 uapsd_queues = ifmgd->uapsd_queues; 1726 1727 count = wmm_param[6] & 0x0f; 1728 if (count == ifmgd->wmm_last_param_set) 1729 return false; 1730 ifmgd->wmm_last_param_set = count; 1731 1732 pos = wmm_param + 8; 1733 left = wmm_param_len - 8; 1734 1735 memset(¶ms, 0, sizeof(params)); 1736 1737 sdata->wmm_acm = 0; 1738 for (; left >= 4; left -= 4, pos += 4) { 1739 int aci = (pos[0] >> 5) & 0x03; 1740 int acm = (pos[0] >> 4) & 0x01; 1741 bool uapsd = false; 1742 1743 switch (aci) { 1744 case 1: /* AC_BK */ 1745 ac = IEEE80211_AC_BK; 1746 if (acm) 1747 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1748 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1749 uapsd = true; 1750 break; 1751 case 2: /* AC_VI */ 1752 ac = IEEE80211_AC_VI; 1753 if (acm) 1754 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1755 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1756 uapsd = true; 1757 break; 1758 case 3: /* AC_VO */ 1759 ac = IEEE80211_AC_VO; 1760 if (acm) 1761 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1762 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1763 uapsd = true; 1764 break; 1765 case 0: /* AC_BE */ 1766 default: 1767 ac = IEEE80211_AC_BE; 1768 if (acm) 1769 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1771 uapsd = true; 1772 break; 1773 } 1774 1775 params[ac].aifs = pos[0] & 0x0f; 1776 1777 if (params[ac].aifs < 2) { 1778 sdata_info(sdata, 1779 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1780 params[ac].aifs, aci); 1781 params[ac].aifs = 2; 1782 } 1783 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1784 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1785 params[ac].txop = get_unaligned_le16(pos + 2); 1786 params[ac].acm = acm; 1787 params[ac].uapsd = uapsd; 1788 1789 if (params[ac].cw_min > params[ac].cw_max) { 1790 sdata_info(sdata, 1791 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1792 params[ac].cw_min, params[ac].cw_max, aci); 1793 return false; 1794 } 1795 } 1796 1797 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1798 mlme_dbg(sdata, 1799 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1800 ac, params[ac].acm, 1801 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1802 params[ac].txop, params[ac].uapsd, 1803 ifmgd->tx_tspec[ac].downgraded); 1804 sdata->tx_conf[ac] = params[ac]; 1805 if (!ifmgd->tx_tspec[ac].downgraded && 1806 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1807 sdata_err(sdata, 1808 "failed to set TX queue parameters for AC %d\n", 1809 ac); 1810 } 1811 1812 /* enable WMM or activate new settings */ 1813 sdata->vif.bss_conf.qos = true; 1814 return true; 1815 } 1816 1817 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1818 { 1819 lockdep_assert_held(&sdata->local->mtx); 1820 1821 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1822 ieee80211_run_deferred_scan(sdata->local); 1823 } 1824 1825 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1826 { 1827 mutex_lock(&sdata->local->mtx); 1828 __ieee80211_stop_poll(sdata); 1829 mutex_unlock(&sdata->local->mtx); 1830 } 1831 1832 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1833 u16 capab, bool erp_valid, u8 erp) 1834 { 1835 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1836 struct ieee80211_supported_band *sband; 1837 u32 changed = 0; 1838 bool use_protection; 1839 bool use_short_preamble; 1840 bool use_short_slot; 1841 1842 sband = ieee80211_get_sband(sdata); 1843 if (!sband) 1844 return changed; 1845 1846 if (erp_valid) { 1847 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1848 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1849 } else { 1850 use_protection = false; 1851 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1852 } 1853 1854 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1855 if (sband->band == NL80211_BAND_5GHZ) 1856 use_short_slot = true; 1857 1858 if (use_protection != bss_conf->use_cts_prot) { 1859 bss_conf->use_cts_prot = use_protection; 1860 changed |= BSS_CHANGED_ERP_CTS_PROT; 1861 } 1862 1863 if (use_short_preamble != bss_conf->use_short_preamble) { 1864 bss_conf->use_short_preamble = use_short_preamble; 1865 changed |= BSS_CHANGED_ERP_PREAMBLE; 1866 } 1867 1868 if (use_short_slot != bss_conf->use_short_slot) { 1869 bss_conf->use_short_slot = use_short_slot; 1870 changed |= BSS_CHANGED_ERP_SLOT; 1871 } 1872 1873 return changed; 1874 } 1875 1876 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1877 struct cfg80211_bss *cbss, 1878 u32 bss_info_changed) 1879 { 1880 struct ieee80211_bss *bss = (void *)cbss->priv; 1881 struct ieee80211_local *local = sdata->local; 1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1883 1884 bss_info_changed |= BSS_CHANGED_ASSOC; 1885 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1886 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1887 1888 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1889 beacon_loss_count * bss_conf->beacon_int)); 1890 1891 sdata->u.mgd.associated = cbss; 1892 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1893 1894 ieee80211_check_rate_mask(sdata); 1895 1896 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1897 1898 if (sdata->vif.p2p || 1899 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1900 const struct cfg80211_bss_ies *ies; 1901 1902 rcu_read_lock(); 1903 ies = rcu_dereference(cbss->ies); 1904 if (ies) { 1905 int ret; 1906 1907 ret = cfg80211_get_p2p_attr( 1908 ies->data, ies->len, 1909 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1910 (u8 *) &bss_conf->p2p_noa_attr, 1911 sizeof(bss_conf->p2p_noa_attr)); 1912 if (ret >= 2) { 1913 sdata->u.mgd.p2p_noa_index = 1914 bss_conf->p2p_noa_attr.index; 1915 bss_info_changed |= BSS_CHANGED_P2P_PS; 1916 } 1917 } 1918 rcu_read_unlock(); 1919 } 1920 1921 /* just to be sure */ 1922 ieee80211_stop_poll(sdata); 1923 1924 ieee80211_led_assoc(local, 1); 1925 1926 if (sdata->u.mgd.have_beacon) { 1927 /* 1928 * If the AP is buggy we may get here with no DTIM period 1929 * known, so assume it's 1 which is the only safe assumption 1930 * in that case, although if the TIM IE is broken powersave 1931 * probably just won't work at all. 1932 */ 1933 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1934 bss_conf->beacon_rate = bss->beacon_rate; 1935 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1936 } else { 1937 bss_conf->beacon_rate = NULL; 1938 bss_conf->dtim_period = 0; 1939 } 1940 1941 bss_conf->assoc = 1; 1942 1943 /* Tell the driver to monitor connection quality (if supported) */ 1944 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1945 bss_conf->cqm_rssi_thold) 1946 bss_info_changed |= BSS_CHANGED_CQM; 1947 1948 /* Enable ARP filtering */ 1949 if (bss_conf->arp_addr_cnt) 1950 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1951 1952 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1953 1954 mutex_lock(&local->iflist_mtx); 1955 ieee80211_recalc_ps(local); 1956 mutex_unlock(&local->iflist_mtx); 1957 1958 ieee80211_recalc_smps(sdata); 1959 ieee80211_recalc_ps_vif(sdata); 1960 1961 netif_carrier_on(sdata->dev); 1962 } 1963 1964 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1965 u16 stype, u16 reason, bool tx, 1966 u8 *frame_buf) 1967 { 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1969 struct ieee80211_local *local = sdata->local; 1970 u32 changed = 0; 1971 1972 sdata_assert_lock(sdata); 1973 1974 if (WARN_ON_ONCE(tx && !frame_buf)) 1975 return; 1976 1977 if (WARN_ON(!ifmgd->associated)) 1978 return; 1979 1980 ieee80211_stop_poll(sdata); 1981 1982 ifmgd->associated = NULL; 1983 netif_carrier_off(sdata->dev); 1984 1985 /* 1986 * if we want to get out of ps before disassoc (why?) we have 1987 * to do it before sending disassoc, as otherwise the null-packet 1988 * won't be valid. 1989 */ 1990 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1991 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1992 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1993 } 1994 local->ps_sdata = NULL; 1995 1996 /* disable per-vif ps */ 1997 ieee80211_recalc_ps_vif(sdata); 1998 1999 /* make sure ongoing transmission finishes */ 2000 synchronize_net(); 2001 2002 /* 2003 * drop any frame before deauth/disassoc, this can be data or 2004 * management frame. Since we are disconnecting, we should not 2005 * insist sending these frames which can take time and delay 2006 * the disconnection and possible the roaming. 2007 */ 2008 if (tx) 2009 ieee80211_flush_queues(local, sdata, true); 2010 2011 /* deauthenticate/disassociate now */ 2012 if (tx || frame_buf) { 2013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2014 2015 /* 2016 * In multi channel scenarios guarantee that the virtual 2017 * interface is granted immediate airtime to transmit the 2018 * deauthentication frame by calling mgd_prepare_tx, if the 2019 * driver requested so. 2020 */ 2021 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2022 !ifmgd->have_beacon) 2023 drv_mgd_prepare_tx(sdata->local, sdata); 2024 2025 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2026 reason, tx, frame_buf); 2027 } 2028 2029 /* flush out frame - make sure the deauth was actually sent */ 2030 if (tx) 2031 ieee80211_flush_queues(local, sdata, false); 2032 2033 /* clear bssid only after building the needed mgmt frames */ 2034 eth_zero_addr(ifmgd->bssid); 2035 2036 /* remove AP and TDLS peers */ 2037 sta_info_flush(sdata); 2038 2039 /* finally reset all BSS / config parameters */ 2040 changed |= ieee80211_reset_erp_info(sdata); 2041 2042 ieee80211_led_assoc(local, 0); 2043 changed |= BSS_CHANGED_ASSOC; 2044 sdata->vif.bss_conf.assoc = false; 2045 2046 ifmgd->p2p_noa_index = -1; 2047 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2048 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2049 2050 /* on the next assoc, re-program HT/VHT parameters */ 2051 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2052 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2053 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2054 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2055 2056 /* reset MU-MIMO ownership and group data */ 2057 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2058 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2059 memset(sdata->vif.bss_conf.mu_group.position, 0, 2060 sizeof(sdata->vif.bss_conf.mu_group.position)); 2061 changed |= BSS_CHANGED_MU_GROUPS; 2062 sdata->vif.mu_mimo_owner = false; 2063 2064 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2065 2066 del_timer_sync(&local->dynamic_ps_timer); 2067 cancel_work_sync(&local->dynamic_ps_enable_work); 2068 2069 /* Disable ARP filtering */ 2070 if (sdata->vif.bss_conf.arp_addr_cnt) 2071 changed |= BSS_CHANGED_ARP_FILTER; 2072 2073 sdata->vif.bss_conf.qos = false; 2074 changed |= BSS_CHANGED_QOS; 2075 2076 /* The BSSID (not really interesting) and HT changed */ 2077 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2078 ieee80211_bss_info_change_notify(sdata, changed); 2079 2080 /* disassociated - set to defaults now */ 2081 ieee80211_set_wmm_default(sdata, false, false); 2082 2083 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2084 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2085 del_timer_sync(&sdata->u.mgd.timer); 2086 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2087 2088 sdata->vif.bss_conf.dtim_period = 0; 2089 sdata->vif.bss_conf.beacon_rate = NULL; 2090 2091 ifmgd->have_beacon = false; 2092 2093 ifmgd->flags = 0; 2094 mutex_lock(&local->mtx); 2095 ieee80211_vif_release_channel(sdata); 2096 2097 sdata->vif.csa_active = false; 2098 ifmgd->csa_waiting_bcn = false; 2099 ifmgd->csa_ignored_same_chan = false; 2100 if (sdata->csa_block_tx) { 2101 ieee80211_wake_vif_queues(local, sdata, 2102 IEEE80211_QUEUE_STOP_REASON_CSA); 2103 sdata->csa_block_tx = false; 2104 } 2105 mutex_unlock(&local->mtx); 2106 2107 /* existing TX TSPEC sessions no longer exist */ 2108 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2109 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2110 2111 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2112 } 2113 2114 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2115 struct ieee80211_hdr *hdr) 2116 { 2117 /* 2118 * We can postpone the mgd.timer whenever receiving unicast frames 2119 * from AP because we know that the connection is working both ways 2120 * at that time. But multicast frames (and hence also beacons) must 2121 * be ignored here, because we need to trigger the timer during 2122 * data idle periods for sending the periodic probe request to the 2123 * AP we're connected to. 2124 */ 2125 if (is_multicast_ether_addr(hdr->addr1)) 2126 return; 2127 2128 ieee80211_sta_reset_conn_monitor(sdata); 2129 } 2130 2131 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2132 { 2133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2134 struct ieee80211_local *local = sdata->local; 2135 2136 mutex_lock(&local->mtx); 2137 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2138 goto out; 2139 2140 __ieee80211_stop_poll(sdata); 2141 2142 mutex_lock(&local->iflist_mtx); 2143 ieee80211_recalc_ps(local); 2144 mutex_unlock(&local->iflist_mtx); 2145 2146 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2147 goto out; 2148 2149 /* 2150 * We've received a probe response, but are not sure whether 2151 * we have or will be receiving any beacons or data, so let's 2152 * schedule the timers again, just in case. 2153 */ 2154 ieee80211_sta_reset_beacon_monitor(sdata); 2155 2156 mod_timer(&ifmgd->conn_mon_timer, 2157 round_jiffies_up(jiffies + 2158 IEEE80211_CONNECTION_IDLE_TIME)); 2159 out: 2160 mutex_unlock(&local->mtx); 2161 } 2162 2163 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2164 struct ieee80211_hdr *hdr, 2165 u16 tx_time) 2166 { 2167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2168 u16 tid = ieee80211_get_tid(hdr); 2169 int ac = ieee80211_ac_from_tid(tid); 2170 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2171 unsigned long now = jiffies; 2172 2173 if (likely(!tx_tspec->admitted_time)) 2174 return; 2175 2176 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2177 tx_tspec->consumed_tx_time = 0; 2178 tx_tspec->time_slice_start = now; 2179 2180 if (tx_tspec->downgraded) { 2181 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2182 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2183 } 2184 } 2185 2186 if (tx_tspec->downgraded) 2187 return; 2188 2189 tx_tspec->consumed_tx_time += tx_time; 2190 2191 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2192 tx_tspec->downgraded = true; 2193 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2194 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2195 } 2196 } 2197 2198 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2199 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2200 { 2201 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2202 2203 if (!ieee80211_is_data(hdr->frame_control)) 2204 return; 2205 2206 if (ieee80211_is_nullfunc(hdr->frame_control) && 2207 sdata->u.mgd.probe_send_count > 0) { 2208 if (ack) 2209 ieee80211_sta_reset_conn_monitor(sdata); 2210 else 2211 sdata->u.mgd.nullfunc_failed = true; 2212 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2213 return; 2214 } 2215 2216 if (ack) 2217 ieee80211_sta_reset_conn_monitor(sdata); 2218 } 2219 2220 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2221 { 2222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2223 const u8 *ssid; 2224 u8 *dst = ifmgd->associated->bssid; 2225 u8 unicast_limit = max(1, max_probe_tries - 3); 2226 struct sta_info *sta; 2227 2228 /* 2229 * Try sending broadcast probe requests for the last three 2230 * probe requests after the first ones failed since some 2231 * buggy APs only support broadcast probe requests. 2232 */ 2233 if (ifmgd->probe_send_count >= unicast_limit) 2234 dst = NULL; 2235 2236 /* 2237 * When the hardware reports an accurate Tx ACK status, it's 2238 * better to send a nullfunc frame instead of a probe request, 2239 * as it will kick us off the AP quickly if we aren't associated 2240 * anymore. The timeout will be reset if the frame is ACKed by 2241 * the AP. 2242 */ 2243 ifmgd->probe_send_count++; 2244 2245 if (dst) { 2246 mutex_lock(&sdata->local->sta_mtx); 2247 sta = sta_info_get(sdata, dst); 2248 if (!WARN_ON(!sta)) 2249 ieee80211_check_fast_rx(sta); 2250 mutex_unlock(&sdata->local->sta_mtx); 2251 } 2252 2253 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2254 ifmgd->nullfunc_failed = false; 2255 ieee80211_send_nullfunc(sdata->local, sdata, false); 2256 } else { 2257 int ssid_len; 2258 2259 rcu_read_lock(); 2260 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2261 if (WARN_ON_ONCE(ssid == NULL)) 2262 ssid_len = 0; 2263 else 2264 ssid_len = ssid[1]; 2265 2266 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2267 ssid + 2, ssid_len, NULL, 2268 0, (u32) -1, true, 0, 2269 ifmgd->associated->channel, false); 2270 rcu_read_unlock(); 2271 } 2272 2273 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2274 run_again(sdata, ifmgd->probe_timeout); 2275 } 2276 2277 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2278 bool beacon) 2279 { 2280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2281 bool already = false; 2282 2283 if (!ieee80211_sdata_running(sdata)) 2284 return; 2285 2286 sdata_lock(sdata); 2287 2288 if (!ifmgd->associated) 2289 goto out; 2290 2291 mutex_lock(&sdata->local->mtx); 2292 2293 if (sdata->local->tmp_channel || sdata->local->scanning) { 2294 mutex_unlock(&sdata->local->mtx); 2295 goto out; 2296 } 2297 2298 if (beacon) { 2299 mlme_dbg_ratelimited(sdata, 2300 "detected beacon loss from AP (missed %d beacons) - probing\n", 2301 beacon_loss_count); 2302 2303 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2304 } 2305 2306 /* 2307 * The driver/our work has already reported this event or the 2308 * connection monitoring has kicked in and we have already sent 2309 * a probe request. Or maybe the AP died and the driver keeps 2310 * reporting until we disassociate... 2311 * 2312 * In either case we have to ignore the current call to this 2313 * function (except for setting the correct probe reason bit) 2314 * because otherwise we would reset the timer every time and 2315 * never check whether we received a probe response! 2316 */ 2317 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2318 already = true; 2319 2320 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2321 2322 mutex_unlock(&sdata->local->mtx); 2323 2324 if (already) 2325 goto out; 2326 2327 mutex_lock(&sdata->local->iflist_mtx); 2328 ieee80211_recalc_ps(sdata->local); 2329 mutex_unlock(&sdata->local->iflist_mtx); 2330 2331 ifmgd->probe_send_count = 0; 2332 ieee80211_mgd_probe_ap_send(sdata); 2333 out: 2334 sdata_unlock(sdata); 2335 } 2336 2337 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2338 struct ieee80211_vif *vif) 2339 { 2340 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2342 struct cfg80211_bss *cbss; 2343 struct sk_buff *skb; 2344 const u8 *ssid; 2345 int ssid_len; 2346 2347 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2348 return NULL; 2349 2350 sdata_assert_lock(sdata); 2351 2352 if (ifmgd->associated) 2353 cbss = ifmgd->associated; 2354 else if (ifmgd->auth_data) 2355 cbss = ifmgd->auth_data->bss; 2356 else if (ifmgd->assoc_data) 2357 cbss = ifmgd->assoc_data->bss; 2358 else 2359 return NULL; 2360 2361 rcu_read_lock(); 2362 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2363 if (WARN_ON_ONCE(ssid == NULL)) 2364 ssid_len = 0; 2365 else 2366 ssid_len = ssid[1]; 2367 2368 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2369 (u32) -1, cbss->channel, 2370 ssid + 2, ssid_len, 2371 NULL, 0, true); 2372 rcu_read_unlock(); 2373 2374 return skb; 2375 } 2376 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2377 2378 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2379 const u8 *buf, size_t len, bool tx, 2380 u16 reason) 2381 { 2382 struct ieee80211_event event = { 2383 .type = MLME_EVENT, 2384 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2385 .u.mlme.reason = reason, 2386 }; 2387 2388 if (tx) 2389 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2390 else 2391 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2392 2393 drv_event_callback(sdata->local, sdata, &event); 2394 } 2395 2396 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2397 { 2398 struct ieee80211_local *local = sdata->local; 2399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2400 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2401 2402 sdata_lock(sdata); 2403 if (!ifmgd->associated) { 2404 sdata_unlock(sdata); 2405 return; 2406 } 2407 2408 /* AP is probably out of range (or not reachable for another reason) so 2409 * remove the bss struct for that AP. 2410 */ 2411 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2412 2413 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2415 true, frame_buf); 2416 mutex_lock(&local->mtx); 2417 sdata->vif.csa_active = false; 2418 ifmgd->csa_waiting_bcn = false; 2419 if (sdata->csa_block_tx) { 2420 ieee80211_wake_vif_queues(local, sdata, 2421 IEEE80211_QUEUE_STOP_REASON_CSA); 2422 sdata->csa_block_tx = false; 2423 } 2424 mutex_unlock(&local->mtx); 2425 2426 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2428 2429 sdata_unlock(sdata); 2430 } 2431 2432 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2433 { 2434 struct ieee80211_sub_if_data *sdata = 2435 container_of(work, struct ieee80211_sub_if_data, 2436 u.mgd.beacon_connection_loss_work); 2437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2438 2439 if (ifmgd->associated) 2440 ifmgd->beacon_loss_count++; 2441 2442 if (ifmgd->connection_loss) { 2443 sdata_info(sdata, "Connection to AP %pM lost\n", 2444 ifmgd->bssid); 2445 __ieee80211_disconnect(sdata); 2446 } else { 2447 ieee80211_mgd_probe_ap(sdata, true); 2448 } 2449 } 2450 2451 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2452 { 2453 struct ieee80211_sub_if_data *sdata = 2454 container_of(work, struct ieee80211_sub_if_data, 2455 u.mgd.csa_connection_drop_work); 2456 2457 __ieee80211_disconnect(sdata); 2458 } 2459 2460 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2461 { 2462 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2463 struct ieee80211_hw *hw = &sdata->local->hw; 2464 2465 trace_api_beacon_loss(sdata); 2466 2467 sdata->u.mgd.connection_loss = false; 2468 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2469 } 2470 EXPORT_SYMBOL(ieee80211_beacon_loss); 2471 2472 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2473 { 2474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2475 struct ieee80211_hw *hw = &sdata->local->hw; 2476 2477 trace_api_connection_loss(sdata); 2478 2479 sdata->u.mgd.connection_loss = true; 2480 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2481 } 2482 EXPORT_SYMBOL(ieee80211_connection_loss); 2483 2484 2485 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2486 bool assoc) 2487 { 2488 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2489 2490 sdata_assert_lock(sdata); 2491 2492 if (!assoc) { 2493 /* 2494 * we are not authenticated yet, the only timer that could be 2495 * running is the timeout for the authentication response which 2496 * which is not relevant anymore. 2497 */ 2498 del_timer_sync(&sdata->u.mgd.timer); 2499 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2500 2501 eth_zero_addr(sdata->u.mgd.bssid); 2502 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2503 sdata->u.mgd.flags = 0; 2504 mutex_lock(&sdata->local->mtx); 2505 ieee80211_vif_release_channel(sdata); 2506 mutex_unlock(&sdata->local->mtx); 2507 } 2508 2509 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2510 kfree(auth_data); 2511 sdata->u.mgd.auth_data = NULL; 2512 } 2513 2514 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2515 bool assoc, bool abandon) 2516 { 2517 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2518 2519 sdata_assert_lock(sdata); 2520 2521 if (!assoc) { 2522 /* 2523 * we are not associated yet, the only timer that could be 2524 * running is the timeout for the association response which 2525 * which is not relevant anymore. 2526 */ 2527 del_timer_sync(&sdata->u.mgd.timer); 2528 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2529 2530 eth_zero_addr(sdata->u.mgd.bssid); 2531 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2532 sdata->u.mgd.flags = 0; 2533 sdata->vif.mu_mimo_owner = false; 2534 2535 mutex_lock(&sdata->local->mtx); 2536 ieee80211_vif_release_channel(sdata); 2537 mutex_unlock(&sdata->local->mtx); 2538 2539 if (abandon) 2540 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2541 } 2542 2543 kfree(assoc_data); 2544 sdata->u.mgd.assoc_data = NULL; 2545 } 2546 2547 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2548 struct ieee80211_mgmt *mgmt, size_t len) 2549 { 2550 struct ieee80211_local *local = sdata->local; 2551 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2552 u8 *pos; 2553 struct ieee802_11_elems elems; 2554 u32 tx_flags = 0; 2555 2556 pos = mgmt->u.auth.variable; 2557 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2558 if (!elems.challenge) 2559 return; 2560 auth_data->expected_transaction = 4; 2561 drv_mgd_prepare_tx(sdata->local, sdata); 2562 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2563 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2564 IEEE80211_TX_INTFL_MLME_CONN_TX; 2565 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2566 elems.challenge - 2, elems.challenge_len + 2, 2567 auth_data->bss->bssid, auth_data->bss->bssid, 2568 auth_data->key, auth_data->key_len, 2569 auth_data->key_idx, tx_flags); 2570 } 2571 2572 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2573 struct ieee80211_mgmt *mgmt, size_t len) 2574 { 2575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2576 u8 bssid[ETH_ALEN]; 2577 u16 auth_alg, auth_transaction, status_code; 2578 struct sta_info *sta; 2579 struct ieee80211_event event = { 2580 .type = MLME_EVENT, 2581 .u.mlme.data = AUTH_EVENT, 2582 }; 2583 2584 sdata_assert_lock(sdata); 2585 2586 if (len < 24 + 6) 2587 return; 2588 2589 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2590 return; 2591 2592 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2593 2594 if (!ether_addr_equal(bssid, mgmt->bssid)) 2595 return; 2596 2597 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2598 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2599 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2600 2601 if (auth_alg != ifmgd->auth_data->algorithm || 2602 auth_transaction != ifmgd->auth_data->expected_transaction) { 2603 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2604 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2605 auth_transaction, 2606 ifmgd->auth_data->expected_transaction); 2607 return; 2608 } 2609 2610 if (status_code != WLAN_STATUS_SUCCESS) { 2611 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2612 mgmt->sa, status_code); 2613 ieee80211_destroy_auth_data(sdata, false); 2614 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2615 event.u.mlme.status = MLME_DENIED; 2616 event.u.mlme.reason = status_code; 2617 drv_event_callback(sdata->local, sdata, &event); 2618 return; 2619 } 2620 2621 switch (ifmgd->auth_data->algorithm) { 2622 case WLAN_AUTH_OPEN: 2623 case WLAN_AUTH_LEAP: 2624 case WLAN_AUTH_FT: 2625 case WLAN_AUTH_SAE: 2626 case WLAN_AUTH_FILS_SK: 2627 case WLAN_AUTH_FILS_SK_PFS: 2628 case WLAN_AUTH_FILS_PK: 2629 break; 2630 case WLAN_AUTH_SHARED_KEY: 2631 if (ifmgd->auth_data->expected_transaction != 4) { 2632 ieee80211_auth_challenge(sdata, mgmt, len); 2633 /* need another frame */ 2634 return; 2635 } 2636 break; 2637 default: 2638 WARN_ONCE(1, "invalid auth alg %d", 2639 ifmgd->auth_data->algorithm); 2640 return; 2641 } 2642 2643 event.u.mlme.status = MLME_SUCCESS; 2644 drv_event_callback(sdata->local, sdata, &event); 2645 sdata_info(sdata, "authenticated\n"); 2646 ifmgd->auth_data->done = true; 2647 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2648 ifmgd->auth_data->timeout_started = true; 2649 run_again(sdata, ifmgd->auth_data->timeout); 2650 2651 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2652 ifmgd->auth_data->expected_transaction != 2) { 2653 /* 2654 * Report auth frame to user space for processing since another 2655 * round of Authentication frames is still needed. 2656 */ 2657 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2658 return; 2659 } 2660 2661 /* move station state to auth */ 2662 mutex_lock(&sdata->local->sta_mtx); 2663 sta = sta_info_get(sdata, bssid); 2664 if (!sta) { 2665 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2666 goto out_err; 2667 } 2668 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2669 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2670 goto out_err; 2671 } 2672 mutex_unlock(&sdata->local->sta_mtx); 2673 2674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2675 return; 2676 out_err: 2677 mutex_unlock(&sdata->local->sta_mtx); 2678 /* ignore frame -- wait for timeout */ 2679 } 2680 2681 #define case_WLAN(type) \ 2682 case WLAN_REASON_##type: return #type 2683 2684 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2685 { 2686 switch (reason_code) { 2687 case_WLAN(UNSPECIFIED); 2688 case_WLAN(PREV_AUTH_NOT_VALID); 2689 case_WLAN(DEAUTH_LEAVING); 2690 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2691 case_WLAN(DISASSOC_AP_BUSY); 2692 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2693 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2694 case_WLAN(DISASSOC_STA_HAS_LEFT); 2695 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2696 case_WLAN(DISASSOC_BAD_POWER); 2697 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2698 case_WLAN(INVALID_IE); 2699 case_WLAN(MIC_FAILURE); 2700 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2701 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2702 case_WLAN(IE_DIFFERENT); 2703 case_WLAN(INVALID_GROUP_CIPHER); 2704 case_WLAN(INVALID_PAIRWISE_CIPHER); 2705 case_WLAN(INVALID_AKMP); 2706 case_WLAN(UNSUPP_RSN_VERSION); 2707 case_WLAN(INVALID_RSN_IE_CAP); 2708 case_WLAN(IEEE8021X_FAILED); 2709 case_WLAN(CIPHER_SUITE_REJECTED); 2710 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2711 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2712 case_WLAN(DISASSOC_LOW_ACK); 2713 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2714 case_WLAN(QSTA_LEAVE_QBSS); 2715 case_WLAN(QSTA_NOT_USE); 2716 case_WLAN(QSTA_REQUIRE_SETUP); 2717 case_WLAN(QSTA_TIMEOUT); 2718 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2719 case_WLAN(MESH_PEER_CANCELED); 2720 case_WLAN(MESH_MAX_PEERS); 2721 case_WLAN(MESH_CONFIG); 2722 case_WLAN(MESH_CLOSE); 2723 case_WLAN(MESH_MAX_RETRIES); 2724 case_WLAN(MESH_CONFIRM_TIMEOUT); 2725 case_WLAN(MESH_INVALID_GTK); 2726 case_WLAN(MESH_INCONSISTENT_PARAM); 2727 case_WLAN(MESH_INVALID_SECURITY); 2728 case_WLAN(MESH_PATH_ERROR); 2729 case_WLAN(MESH_PATH_NOFORWARD); 2730 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2731 case_WLAN(MAC_EXISTS_IN_MBSS); 2732 case_WLAN(MESH_CHAN_REGULATORY); 2733 case_WLAN(MESH_CHAN); 2734 default: return "<unknown>"; 2735 } 2736 } 2737 2738 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2739 struct ieee80211_mgmt *mgmt, size_t len) 2740 { 2741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2742 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2743 2744 sdata_assert_lock(sdata); 2745 2746 if (len < 24 + 2) 2747 return; 2748 2749 if (ifmgd->associated && 2750 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2751 const u8 *bssid = ifmgd->associated->bssid; 2752 2753 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2754 bssid, reason_code, 2755 ieee80211_get_reason_code_string(reason_code)); 2756 2757 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2758 2759 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2760 reason_code); 2761 return; 2762 } 2763 2764 if (ifmgd->assoc_data && 2765 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2766 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2767 2768 sdata_info(sdata, 2769 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2770 bssid, reason_code, 2771 ieee80211_get_reason_code_string(reason_code)); 2772 2773 ieee80211_destroy_assoc_data(sdata, false, true); 2774 2775 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2776 return; 2777 } 2778 } 2779 2780 2781 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2782 struct ieee80211_mgmt *mgmt, size_t len) 2783 { 2784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2785 u16 reason_code; 2786 2787 sdata_assert_lock(sdata); 2788 2789 if (len < 24 + 2) 2790 return; 2791 2792 if (!ifmgd->associated || 2793 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2794 return; 2795 2796 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2797 2798 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2799 mgmt->sa, reason_code, 2800 ieee80211_get_reason_code_string(reason_code)); 2801 2802 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2803 2804 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2805 } 2806 2807 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2808 u8 *supp_rates, unsigned int supp_rates_len, 2809 u32 *rates, u32 *basic_rates, 2810 bool *have_higher_than_11mbit, 2811 int *min_rate, int *min_rate_index, 2812 int shift) 2813 { 2814 int i, j; 2815 2816 for (i = 0; i < supp_rates_len; i++) { 2817 int rate = supp_rates[i] & 0x7f; 2818 bool is_basic = !!(supp_rates[i] & 0x80); 2819 2820 if ((rate * 5 * (1 << shift)) > 110) 2821 *have_higher_than_11mbit = true; 2822 2823 /* 2824 * Skip HT and VHT BSS membership selectors since they're not 2825 * rates. 2826 * 2827 * Note: Even though the membership selector and the basic 2828 * rate flag share the same bit, they are not exactly 2829 * the same. 2830 */ 2831 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2832 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2833 continue; 2834 2835 for (j = 0; j < sband->n_bitrates; j++) { 2836 struct ieee80211_rate *br; 2837 int brate; 2838 2839 br = &sband->bitrates[j]; 2840 2841 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2842 if (brate == rate) { 2843 *rates |= BIT(j); 2844 if (is_basic) 2845 *basic_rates |= BIT(j); 2846 if ((rate * 5) < *min_rate) { 2847 *min_rate = rate * 5; 2848 *min_rate_index = j; 2849 } 2850 break; 2851 } 2852 } 2853 } 2854 } 2855 2856 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2857 struct cfg80211_bss *cbss, 2858 struct ieee80211_mgmt *mgmt, size_t len) 2859 { 2860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2861 struct ieee80211_local *local = sdata->local; 2862 struct ieee80211_supported_band *sband; 2863 struct sta_info *sta; 2864 u8 *pos; 2865 u16 capab_info, aid; 2866 struct ieee802_11_elems elems; 2867 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2868 const struct cfg80211_bss_ies *bss_ies = NULL; 2869 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2870 u32 changed = 0; 2871 int err; 2872 bool ret; 2873 2874 /* AssocResp and ReassocResp have identical structure */ 2875 2876 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2877 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2878 2879 /* 2880 * The 5 MSB of the AID field are reserved 2881 * (802.11-2016 9.4.1.8 AID field) 2882 */ 2883 aid &= 0x7ff; 2884 2885 ifmgd->broken_ap = false; 2886 2887 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2888 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2889 aid); 2890 aid = 0; 2891 ifmgd->broken_ap = true; 2892 } 2893 2894 pos = mgmt->u.assoc_resp.variable; 2895 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2896 2897 if (!elems.supp_rates) { 2898 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2899 return false; 2900 } 2901 2902 ifmgd->aid = aid; 2903 ifmgd->tdls_chan_switch_prohibited = 2904 elems.ext_capab && elems.ext_capab_len >= 5 && 2905 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2906 2907 /* 2908 * Some APs are erroneously not including some information in their 2909 * (re)association response frames. Try to recover by using the data 2910 * from the beacon or probe response. This seems to afflict mobile 2911 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2912 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2913 */ 2914 if ((assoc_data->wmm && !elems.wmm_param) || 2915 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2916 (!elems.ht_cap_elem || !elems.ht_operation)) || 2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2918 (!elems.vht_cap_elem || !elems.vht_operation))) { 2919 const struct cfg80211_bss_ies *ies; 2920 struct ieee802_11_elems bss_elems; 2921 2922 rcu_read_lock(); 2923 ies = rcu_dereference(cbss->ies); 2924 if (ies) 2925 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2926 GFP_ATOMIC); 2927 rcu_read_unlock(); 2928 if (!bss_ies) 2929 return false; 2930 2931 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2932 false, &bss_elems); 2933 if (assoc_data->wmm && 2934 !elems.wmm_param && bss_elems.wmm_param) { 2935 elems.wmm_param = bss_elems.wmm_param; 2936 sdata_info(sdata, 2937 "AP bug: WMM param missing from AssocResp\n"); 2938 } 2939 2940 /* 2941 * Also check if we requested HT/VHT, otherwise the AP doesn't 2942 * have to include the IEs in the (re)association response. 2943 */ 2944 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2945 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2946 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2947 sdata_info(sdata, 2948 "AP bug: HT capability missing from AssocResp\n"); 2949 } 2950 if (!elems.ht_operation && bss_elems.ht_operation && 2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2952 elems.ht_operation = bss_elems.ht_operation; 2953 sdata_info(sdata, 2954 "AP bug: HT operation missing from AssocResp\n"); 2955 } 2956 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2957 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2958 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2959 sdata_info(sdata, 2960 "AP bug: VHT capa missing from AssocResp\n"); 2961 } 2962 if (!elems.vht_operation && bss_elems.vht_operation && 2963 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2964 elems.vht_operation = bss_elems.vht_operation; 2965 sdata_info(sdata, 2966 "AP bug: VHT operation missing from AssocResp\n"); 2967 } 2968 } 2969 2970 /* 2971 * We previously checked these in the beacon/probe response, so 2972 * they should be present here. This is just a safety net. 2973 */ 2974 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2975 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2976 sdata_info(sdata, 2977 "HT AP is missing WMM params or HT capability/operation\n"); 2978 ret = false; 2979 goto out; 2980 } 2981 2982 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2983 (!elems.vht_cap_elem || !elems.vht_operation)) { 2984 sdata_info(sdata, 2985 "VHT AP is missing VHT capability/operation\n"); 2986 ret = false; 2987 goto out; 2988 } 2989 2990 mutex_lock(&sdata->local->sta_mtx); 2991 /* 2992 * station info was already allocated and inserted before 2993 * the association and should be available to us 2994 */ 2995 sta = sta_info_get(sdata, cbss->bssid); 2996 if (WARN_ON(!sta)) { 2997 mutex_unlock(&sdata->local->sta_mtx); 2998 ret = false; 2999 goto out; 3000 } 3001 3002 sband = ieee80211_get_sband(sdata); 3003 if (!sband) { 3004 mutex_unlock(&sdata->local->sta_mtx); 3005 ret = false; 3006 goto out; 3007 } 3008 3009 /* Set up internal HT/VHT capabilities */ 3010 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3011 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3012 elems.ht_cap_elem, sta); 3013 3014 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3015 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3016 elems.vht_cap_elem, sta); 3017 3018 /* 3019 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3020 * in their association response, so ignore that data for our own 3021 * configuration. If it changed since the last beacon, we'll get the 3022 * next beacon and update then. 3023 */ 3024 3025 /* 3026 * If an operating mode notification IE is present, override the 3027 * NSS calculation (that would be done in rate_control_rate_init()) 3028 * and use the # of streams from that element. 3029 */ 3030 if (elems.opmode_notif && 3031 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3032 u8 nss; 3033 3034 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3035 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3036 nss += 1; 3037 sta->sta.rx_nss = nss; 3038 } 3039 3040 rate_control_rate_init(sta); 3041 3042 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3043 set_sta_flag(sta, WLAN_STA_MFP); 3044 sta->sta.mfp = true; 3045 } else { 3046 sta->sta.mfp = false; 3047 } 3048 3049 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3050 3051 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3052 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3053 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3054 if (err) { 3055 sdata_info(sdata, 3056 "failed to move station %pM to desired state\n", 3057 sta->sta.addr); 3058 WARN_ON(__sta_info_destroy(sta)); 3059 mutex_unlock(&sdata->local->sta_mtx); 3060 ret = false; 3061 goto out; 3062 } 3063 3064 mutex_unlock(&sdata->local->sta_mtx); 3065 3066 /* 3067 * Always handle WMM once after association regardless 3068 * of the first value the AP uses. Setting -1 here has 3069 * that effect because the AP values is an unsigned 3070 * 4-bit value. 3071 */ 3072 ifmgd->wmm_last_param_set = -1; 3073 3074 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3075 ieee80211_set_wmm_default(sdata, false, false); 3076 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3077 elems.wmm_param_len)) { 3078 /* still enable QoS since we might have HT/VHT */ 3079 ieee80211_set_wmm_default(sdata, false, true); 3080 /* set the disable-WMM flag in this case to disable 3081 * tracking WMM parameter changes in the beacon if 3082 * the parameters weren't actually valid. Doing so 3083 * avoids changing parameters very strangely when 3084 * the AP is going back and forth between valid and 3085 * invalid parameters. 3086 */ 3087 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3088 } 3089 changed |= BSS_CHANGED_QOS; 3090 3091 if (elems.max_idle_period_ie) { 3092 bss_conf->max_idle_period = 3093 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3094 bss_conf->protected_keep_alive = 3095 !!(elems.max_idle_period_ie->idle_options & 3096 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3097 changed |= BSS_CHANGED_KEEP_ALIVE; 3098 } else { 3099 bss_conf->max_idle_period = 0; 3100 bss_conf->protected_keep_alive = false; 3101 } 3102 3103 /* set AID and assoc capability, 3104 * ieee80211_set_associated() will tell the driver */ 3105 bss_conf->aid = aid; 3106 bss_conf->assoc_capability = capab_info; 3107 ieee80211_set_associated(sdata, cbss, changed); 3108 3109 /* 3110 * If we're using 4-addr mode, let the AP know that we're 3111 * doing so, so that it can create the STA VLAN on its side 3112 */ 3113 if (ifmgd->use_4addr) 3114 ieee80211_send_4addr_nullfunc(local, sdata); 3115 3116 /* 3117 * Start timer to probe the connection to the AP now. 3118 * Also start the timer that will detect beacon loss. 3119 */ 3120 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3121 ieee80211_sta_reset_beacon_monitor(sdata); 3122 3123 ret = true; 3124 out: 3125 kfree(bss_ies); 3126 return ret; 3127 } 3128 3129 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3130 struct ieee80211_mgmt *mgmt, 3131 size_t len) 3132 { 3133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3134 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3135 u16 capab_info, status_code, aid; 3136 struct ieee802_11_elems elems; 3137 int ac, uapsd_queues = -1; 3138 u8 *pos; 3139 bool reassoc; 3140 struct cfg80211_bss *bss; 3141 struct ieee80211_event event = { 3142 .type = MLME_EVENT, 3143 .u.mlme.data = ASSOC_EVENT, 3144 }; 3145 3146 sdata_assert_lock(sdata); 3147 3148 if (!assoc_data) 3149 return; 3150 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3151 return; 3152 3153 /* 3154 * AssocResp and ReassocResp have identical structure, so process both 3155 * of them in this function. 3156 */ 3157 3158 if (len < 24 + 6) 3159 return; 3160 3161 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3162 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3163 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3164 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3165 3166 sdata_info(sdata, 3167 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3168 reassoc ? "Rea" : "A", mgmt->sa, 3169 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3170 3171 if (assoc_data->fils_kek_len && 3172 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3173 return; 3174 3175 pos = mgmt->u.assoc_resp.variable; 3176 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3177 3178 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3179 elems.timeout_int && 3180 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3181 u32 tu, ms; 3182 tu = le32_to_cpu(elems.timeout_int->value); 3183 ms = tu * 1024 / 1000; 3184 sdata_info(sdata, 3185 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3186 mgmt->sa, tu, ms); 3187 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3188 assoc_data->timeout_started = true; 3189 if (ms > IEEE80211_ASSOC_TIMEOUT) 3190 run_again(sdata, assoc_data->timeout); 3191 return; 3192 } 3193 3194 bss = assoc_data->bss; 3195 3196 if (status_code != WLAN_STATUS_SUCCESS) { 3197 sdata_info(sdata, "%pM denied association (code=%d)\n", 3198 mgmt->sa, status_code); 3199 ieee80211_destroy_assoc_data(sdata, false, false); 3200 event.u.mlme.status = MLME_DENIED; 3201 event.u.mlme.reason = status_code; 3202 drv_event_callback(sdata->local, sdata, &event); 3203 } else { 3204 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3205 /* oops -- internal error -- send timeout for now */ 3206 ieee80211_destroy_assoc_data(sdata, false, false); 3207 cfg80211_assoc_timeout(sdata->dev, bss); 3208 return; 3209 } 3210 event.u.mlme.status = MLME_SUCCESS; 3211 drv_event_callback(sdata->local, sdata, &event); 3212 sdata_info(sdata, "associated\n"); 3213 3214 /* 3215 * destroy assoc_data afterwards, as otherwise an idle 3216 * recalc after assoc_data is NULL but before associated 3217 * is set can cause the interface to go idle 3218 */ 3219 ieee80211_destroy_assoc_data(sdata, true, false); 3220 3221 /* get uapsd queues configuration */ 3222 uapsd_queues = 0; 3223 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3224 if (sdata->tx_conf[ac].uapsd) 3225 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3226 } 3227 3228 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3229 } 3230 3231 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3232 struct ieee80211_mgmt *mgmt, size_t len, 3233 struct ieee80211_rx_status *rx_status, 3234 struct ieee802_11_elems *elems) 3235 { 3236 struct ieee80211_local *local = sdata->local; 3237 struct ieee80211_bss *bss; 3238 struct ieee80211_channel *channel; 3239 3240 sdata_assert_lock(sdata); 3241 3242 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3243 if (!channel) 3244 return; 3245 3246 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3247 channel); 3248 if (bss) { 3249 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3250 ieee80211_rx_bss_put(local, bss); 3251 } 3252 } 3253 3254 3255 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3256 struct sk_buff *skb) 3257 { 3258 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3259 struct ieee80211_if_managed *ifmgd; 3260 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3261 size_t baselen, len = skb->len; 3262 struct ieee802_11_elems elems; 3263 3264 ifmgd = &sdata->u.mgd; 3265 3266 sdata_assert_lock(sdata); 3267 3268 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3269 return; /* ignore ProbeResp to foreign address */ 3270 3271 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3272 if (baselen > len) 3273 return; 3274 3275 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3276 false, &elems); 3277 3278 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3279 3280 if (ifmgd->associated && 3281 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3282 ieee80211_reset_ap_probe(sdata); 3283 } 3284 3285 /* 3286 * This is the canonical list of information elements we care about, 3287 * the filter code also gives us all changes to the Microsoft OUI 3288 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3289 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3290 * changes to requested client power. 3291 * 3292 * We implement beacon filtering in software since that means we can 3293 * avoid processing the frame here and in cfg80211, and userspace 3294 * will not be able to tell whether the hardware supports it or not. 3295 * 3296 * XXX: This list needs to be dynamic -- userspace needs to be able to 3297 * add items it requires. It also needs to be able to tell us to 3298 * look out for other vendor IEs. 3299 */ 3300 static const u64 care_about_ies = 3301 (1ULL << WLAN_EID_COUNTRY) | 3302 (1ULL << WLAN_EID_ERP_INFO) | 3303 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3304 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3305 (1ULL << WLAN_EID_HT_CAPABILITY) | 3306 (1ULL << WLAN_EID_HT_OPERATION) | 3307 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3308 3309 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3310 struct ieee80211_mgmt *mgmt, size_t len, 3311 struct ieee80211_rx_status *rx_status) 3312 { 3313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3314 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3315 size_t baselen; 3316 struct ieee802_11_elems elems; 3317 struct ieee80211_local *local = sdata->local; 3318 struct ieee80211_chanctx_conf *chanctx_conf; 3319 struct ieee80211_channel *chan; 3320 struct sta_info *sta; 3321 u32 changed = 0; 3322 bool erp_valid; 3323 u8 erp_value = 0; 3324 u32 ncrc; 3325 u8 *bssid; 3326 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3327 3328 sdata_assert_lock(sdata); 3329 3330 /* Process beacon from the current BSS */ 3331 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3332 if (baselen > len) 3333 return; 3334 3335 rcu_read_lock(); 3336 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3337 if (!chanctx_conf) { 3338 rcu_read_unlock(); 3339 return; 3340 } 3341 3342 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3343 rcu_read_unlock(); 3344 return; 3345 } 3346 chan = chanctx_conf->def.chan; 3347 rcu_read_unlock(); 3348 3349 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3350 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3351 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3352 len - baselen, false, &elems); 3353 3354 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3355 if (elems.tim && !elems.parse_error) { 3356 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3357 ifmgd->dtim_period = tim_ie->dtim_period; 3358 } 3359 ifmgd->have_beacon = true; 3360 ifmgd->assoc_data->need_beacon = false; 3361 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3362 sdata->vif.bss_conf.sync_tsf = 3363 le64_to_cpu(mgmt->u.beacon.timestamp); 3364 sdata->vif.bss_conf.sync_device_ts = 3365 rx_status->device_timestamp; 3366 if (elems.tim) 3367 sdata->vif.bss_conf.sync_dtim_count = 3368 elems.tim->dtim_count; 3369 else 3370 sdata->vif.bss_conf.sync_dtim_count = 0; 3371 } 3372 /* continue assoc process */ 3373 ifmgd->assoc_data->timeout = jiffies; 3374 ifmgd->assoc_data->timeout_started = true; 3375 run_again(sdata, ifmgd->assoc_data->timeout); 3376 return; 3377 } 3378 3379 if (!ifmgd->associated || 3380 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3381 return; 3382 bssid = ifmgd->associated->bssid; 3383 3384 /* Track average RSSI from the Beacon frames of the current AP */ 3385 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3386 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3387 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3388 ifmgd->last_cqm_event_signal = 0; 3389 ifmgd->count_beacon_signal = 1; 3390 ifmgd->last_ave_beacon_signal = 0; 3391 } else { 3392 ifmgd->count_beacon_signal++; 3393 } 3394 3395 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3396 3397 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3398 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3399 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3400 int last_sig = ifmgd->last_ave_beacon_signal; 3401 struct ieee80211_event event = { 3402 .type = RSSI_EVENT, 3403 }; 3404 3405 /* 3406 * if signal crosses either of the boundaries, invoke callback 3407 * with appropriate parameters 3408 */ 3409 if (sig > ifmgd->rssi_max_thold && 3410 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3411 ifmgd->last_ave_beacon_signal = sig; 3412 event.u.rssi.data = RSSI_EVENT_HIGH; 3413 drv_event_callback(local, sdata, &event); 3414 } else if (sig < ifmgd->rssi_min_thold && 3415 (last_sig >= ifmgd->rssi_max_thold || 3416 last_sig == 0)) { 3417 ifmgd->last_ave_beacon_signal = sig; 3418 event.u.rssi.data = RSSI_EVENT_LOW; 3419 drv_event_callback(local, sdata, &event); 3420 } 3421 } 3422 3423 if (bss_conf->cqm_rssi_thold && 3424 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3425 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3426 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3427 int last_event = ifmgd->last_cqm_event_signal; 3428 int thold = bss_conf->cqm_rssi_thold; 3429 int hyst = bss_conf->cqm_rssi_hyst; 3430 3431 if (sig < thold && 3432 (last_event == 0 || sig < last_event - hyst)) { 3433 ifmgd->last_cqm_event_signal = sig; 3434 ieee80211_cqm_rssi_notify( 3435 &sdata->vif, 3436 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3437 sig, GFP_KERNEL); 3438 } else if (sig > thold && 3439 (last_event == 0 || sig > last_event + hyst)) { 3440 ifmgd->last_cqm_event_signal = sig; 3441 ieee80211_cqm_rssi_notify( 3442 &sdata->vif, 3443 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3444 sig, GFP_KERNEL); 3445 } 3446 } 3447 3448 if (bss_conf->cqm_rssi_low && 3449 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3450 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3451 int last_event = ifmgd->last_cqm_event_signal; 3452 int low = bss_conf->cqm_rssi_low; 3453 int high = bss_conf->cqm_rssi_high; 3454 3455 if (sig < low && 3456 (last_event == 0 || last_event >= low)) { 3457 ifmgd->last_cqm_event_signal = sig; 3458 ieee80211_cqm_rssi_notify( 3459 &sdata->vif, 3460 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3461 sig, GFP_KERNEL); 3462 } else if (sig > high && 3463 (last_event == 0 || last_event <= high)) { 3464 ifmgd->last_cqm_event_signal = sig; 3465 ieee80211_cqm_rssi_notify( 3466 &sdata->vif, 3467 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3468 sig, GFP_KERNEL); 3469 } 3470 } 3471 3472 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3473 mlme_dbg_ratelimited(sdata, 3474 "cancelling AP probe due to a received beacon\n"); 3475 ieee80211_reset_ap_probe(sdata); 3476 } 3477 3478 /* 3479 * Push the beacon loss detection into the future since 3480 * we are processing a beacon from the AP just now. 3481 */ 3482 ieee80211_sta_reset_beacon_monitor(sdata); 3483 3484 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3485 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3486 len - baselen, false, &elems, 3487 care_about_ies, ncrc); 3488 3489 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3490 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3491 if (local->hw.conf.dynamic_ps_timeout > 0) { 3492 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3493 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3494 ieee80211_hw_config(local, 3495 IEEE80211_CONF_CHANGE_PS); 3496 } 3497 ieee80211_send_nullfunc(local, sdata, false); 3498 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3499 local->pspolling = true; 3500 3501 /* 3502 * Here is assumed that the driver will be 3503 * able to send ps-poll frame and receive a 3504 * response even though power save mode is 3505 * enabled, but some drivers might require 3506 * to disable power save here. This needs 3507 * to be investigated. 3508 */ 3509 ieee80211_send_pspoll(local, sdata); 3510 } 3511 } 3512 3513 if (sdata->vif.p2p || 3514 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3515 struct ieee80211_p2p_noa_attr noa = {}; 3516 int ret; 3517 3518 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3519 len - baselen, 3520 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3521 (u8 *) &noa, sizeof(noa)); 3522 if (ret >= 2) { 3523 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3524 /* valid noa_attr and index changed */ 3525 sdata->u.mgd.p2p_noa_index = noa.index; 3526 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3527 changed |= BSS_CHANGED_P2P_PS; 3528 /* 3529 * make sure we update all information, the CRC 3530 * mechanism doesn't look at P2P attributes. 3531 */ 3532 ifmgd->beacon_crc_valid = false; 3533 } 3534 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3535 /* noa_attr not found and we had valid noa_attr before */ 3536 sdata->u.mgd.p2p_noa_index = -1; 3537 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3538 changed |= BSS_CHANGED_P2P_PS; 3539 ifmgd->beacon_crc_valid = false; 3540 } 3541 } 3542 3543 if (ifmgd->csa_waiting_bcn) 3544 ieee80211_chswitch_post_beacon(sdata); 3545 3546 /* 3547 * Update beacon timing and dtim count on every beacon appearance. This 3548 * will allow the driver to use the most updated values. Do it before 3549 * comparing this one with last received beacon. 3550 * IMPORTANT: These parameters would possibly be out of sync by the time 3551 * the driver will use them. The synchronized view is currently 3552 * guaranteed only in certain callbacks. 3553 */ 3554 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3555 sdata->vif.bss_conf.sync_tsf = 3556 le64_to_cpu(mgmt->u.beacon.timestamp); 3557 sdata->vif.bss_conf.sync_device_ts = 3558 rx_status->device_timestamp; 3559 if (elems.tim) 3560 sdata->vif.bss_conf.sync_dtim_count = 3561 elems.tim->dtim_count; 3562 else 3563 sdata->vif.bss_conf.sync_dtim_count = 0; 3564 } 3565 3566 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3567 return; 3568 ifmgd->beacon_crc = ncrc; 3569 ifmgd->beacon_crc_valid = true; 3570 3571 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3572 3573 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3574 rx_status->device_timestamp, 3575 &elems, true); 3576 3577 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3578 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3579 elems.wmm_param_len)) 3580 changed |= BSS_CHANGED_QOS; 3581 3582 /* 3583 * If we haven't had a beacon before, tell the driver about the 3584 * DTIM period (and beacon timing if desired) now. 3585 */ 3586 if (!ifmgd->have_beacon) { 3587 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3588 if (elems.tim) 3589 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3590 else 3591 bss_conf->dtim_period = 1; 3592 3593 changed |= BSS_CHANGED_BEACON_INFO; 3594 ifmgd->have_beacon = true; 3595 3596 mutex_lock(&local->iflist_mtx); 3597 ieee80211_recalc_ps(local); 3598 mutex_unlock(&local->iflist_mtx); 3599 3600 ieee80211_recalc_ps_vif(sdata); 3601 } 3602 3603 if (elems.erp_info) { 3604 erp_valid = true; 3605 erp_value = elems.erp_info[0]; 3606 } else { 3607 erp_valid = false; 3608 } 3609 changed |= ieee80211_handle_bss_capability(sdata, 3610 le16_to_cpu(mgmt->u.beacon.capab_info), 3611 erp_valid, erp_value); 3612 3613 mutex_lock(&local->sta_mtx); 3614 sta = sta_info_get(sdata, bssid); 3615 3616 if (ieee80211_config_bw(sdata, sta, 3617 elems.ht_cap_elem, elems.ht_operation, 3618 elems.vht_operation, bssid, &changed)) { 3619 mutex_unlock(&local->sta_mtx); 3620 sdata_info(sdata, 3621 "failed to follow AP %pM bandwidth change, disconnect\n", 3622 bssid); 3623 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3624 WLAN_REASON_DEAUTH_LEAVING, 3625 true, deauth_buf); 3626 ieee80211_report_disconnect(sdata, deauth_buf, 3627 sizeof(deauth_buf), true, 3628 WLAN_REASON_DEAUTH_LEAVING); 3629 return; 3630 } 3631 3632 if (sta && elems.opmode_notif) 3633 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3634 rx_status->band); 3635 mutex_unlock(&local->sta_mtx); 3636 3637 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3638 elems.country_elem, 3639 elems.country_elem_len, 3640 elems.pwr_constr_elem, 3641 elems.cisco_dtpc_elem); 3642 3643 ieee80211_bss_info_change_notify(sdata, changed); 3644 } 3645 3646 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3647 struct sk_buff *skb) 3648 { 3649 struct ieee80211_rx_status *rx_status; 3650 struct ieee80211_mgmt *mgmt; 3651 u16 fc; 3652 struct ieee802_11_elems elems; 3653 int ies_len; 3654 3655 rx_status = (struct ieee80211_rx_status *) skb->cb; 3656 mgmt = (struct ieee80211_mgmt *) skb->data; 3657 fc = le16_to_cpu(mgmt->frame_control); 3658 3659 sdata_lock(sdata); 3660 3661 switch (fc & IEEE80211_FCTL_STYPE) { 3662 case IEEE80211_STYPE_BEACON: 3663 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3664 break; 3665 case IEEE80211_STYPE_PROBE_RESP: 3666 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3667 break; 3668 case IEEE80211_STYPE_AUTH: 3669 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3670 break; 3671 case IEEE80211_STYPE_DEAUTH: 3672 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3673 break; 3674 case IEEE80211_STYPE_DISASSOC: 3675 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3676 break; 3677 case IEEE80211_STYPE_ASSOC_RESP: 3678 case IEEE80211_STYPE_REASSOC_RESP: 3679 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3680 break; 3681 case IEEE80211_STYPE_ACTION: 3682 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3683 ies_len = skb->len - 3684 offsetof(struct ieee80211_mgmt, 3685 u.action.u.chan_switch.variable); 3686 3687 if (ies_len < 0) 3688 break; 3689 3690 ieee802_11_parse_elems( 3691 mgmt->u.action.u.chan_switch.variable, 3692 ies_len, true, &elems); 3693 3694 if (elems.parse_error) 3695 break; 3696 3697 ieee80211_sta_process_chanswitch(sdata, 3698 rx_status->mactime, 3699 rx_status->device_timestamp, 3700 &elems, false); 3701 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3702 ies_len = skb->len - 3703 offsetof(struct ieee80211_mgmt, 3704 u.action.u.ext_chan_switch.variable); 3705 3706 if (ies_len < 0) 3707 break; 3708 3709 ieee802_11_parse_elems( 3710 mgmt->u.action.u.ext_chan_switch.variable, 3711 ies_len, true, &elems); 3712 3713 if (elems.parse_error) 3714 break; 3715 3716 /* for the handling code pretend this was also an IE */ 3717 elems.ext_chansw_ie = 3718 &mgmt->u.action.u.ext_chan_switch.data; 3719 3720 ieee80211_sta_process_chanswitch(sdata, 3721 rx_status->mactime, 3722 rx_status->device_timestamp, 3723 &elems, false); 3724 } 3725 break; 3726 } 3727 sdata_unlock(sdata); 3728 } 3729 3730 static void ieee80211_sta_timer(struct timer_list *t) 3731 { 3732 struct ieee80211_sub_if_data *sdata = 3733 from_timer(sdata, t, u.mgd.timer); 3734 3735 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3736 } 3737 3738 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3739 u8 *bssid, u8 reason, bool tx) 3740 { 3741 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3742 3743 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3744 tx, frame_buf); 3745 3746 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3747 reason); 3748 } 3749 3750 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3751 { 3752 struct ieee80211_local *local = sdata->local; 3753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3754 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3755 u32 tx_flags = 0; 3756 u16 trans = 1; 3757 u16 status = 0; 3758 3759 sdata_assert_lock(sdata); 3760 3761 if (WARN_ON_ONCE(!auth_data)) 3762 return -EINVAL; 3763 3764 auth_data->tries++; 3765 3766 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3767 sdata_info(sdata, "authentication with %pM timed out\n", 3768 auth_data->bss->bssid); 3769 3770 /* 3771 * Most likely AP is not in the range so remove the 3772 * bss struct for that AP. 3773 */ 3774 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3775 3776 return -ETIMEDOUT; 3777 } 3778 3779 drv_mgd_prepare_tx(local, sdata); 3780 3781 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3782 auth_data->bss->bssid, auth_data->tries, 3783 IEEE80211_AUTH_MAX_TRIES); 3784 3785 auth_data->expected_transaction = 2; 3786 3787 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3788 trans = auth_data->sae_trans; 3789 status = auth_data->sae_status; 3790 auth_data->expected_transaction = trans; 3791 } 3792 3793 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3794 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3795 IEEE80211_TX_INTFL_MLME_CONN_TX; 3796 3797 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3798 auth_data->data, auth_data->data_len, 3799 auth_data->bss->bssid, 3800 auth_data->bss->bssid, NULL, 0, 0, 3801 tx_flags); 3802 3803 if (tx_flags == 0) { 3804 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3805 auth_data->timeout_started = true; 3806 run_again(sdata, auth_data->timeout); 3807 } else { 3808 auth_data->timeout = 3809 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3810 auth_data->timeout_started = true; 3811 run_again(sdata, auth_data->timeout); 3812 } 3813 3814 return 0; 3815 } 3816 3817 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3818 { 3819 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3820 struct ieee80211_local *local = sdata->local; 3821 3822 sdata_assert_lock(sdata); 3823 3824 assoc_data->tries++; 3825 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3826 sdata_info(sdata, "association with %pM timed out\n", 3827 assoc_data->bss->bssid); 3828 3829 /* 3830 * Most likely AP is not in the range so remove the 3831 * bss struct for that AP. 3832 */ 3833 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3834 3835 return -ETIMEDOUT; 3836 } 3837 3838 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3839 assoc_data->bss->bssid, assoc_data->tries, 3840 IEEE80211_ASSOC_MAX_TRIES); 3841 ieee80211_send_assoc(sdata); 3842 3843 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3844 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3845 assoc_data->timeout_started = true; 3846 run_again(sdata, assoc_data->timeout); 3847 } else { 3848 assoc_data->timeout = 3849 round_jiffies_up(jiffies + 3850 IEEE80211_ASSOC_TIMEOUT_LONG); 3851 assoc_data->timeout_started = true; 3852 run_again(sdata, assoc_data->timeout); 3853 } 3854 3855 return 0; 3856 } 3857 3858 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3859 __le16 fc, bool acked) 3860 { 3861 struct ieee80211_local *local = sdata->local; 3862 3863 sdata->u.mgd.status_fc = fc; 3864 sdata->u.mgd.status_acked = acked; 3865 sdata->u.mgd.status_received = true; 3866 3867 ieee80211_queue_work(&local->hw, &sdata->work); 3868 } 3869 3870 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3871 { 3872 struct ieee80211_local *local = sdata->local; 3873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3874 3875 sdata_lock(sdata); 3876 3877 if (ifmgd->status_received) { 3878 __le16 fc = ifmgd->status_fc; 3879 bool status_acked = ifmgd->status_acked; 3880 3881 ifmgd->status_received = false; 3882 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3883 if (status_acked) { 3884 ifmgd->auth_data->timeout = 3885 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3886 run_again(sdata, ifmgd->auth_data->timeout); 3887 } else { 3888 ifmgd->auth_data->timeout = jiffies - 1; 3889 } 3890 ifmgd->auth_data->timeout_started = true; 3891 } else if (ifmgd->assoc_data && 3892 (ieee80211_is_assoc_req(fc) || 3893 ieee80211_is_reassoc_req(fc))) { 3894 if (status_acked) { 3895 ifmgd->assoc_data->timeout = 3896 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3897 run_again(sdata, ifmgd->assoc_data->timeout); 3898 } else { 3899 ifmgd->assoc_data->timeout = jiffies - 1; 3900 } 3901 ifmgd->assoc_data->timeout_started = true; 3902 } 3903 } 3904 3905 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3906 time_after(jiffies, ifmgd->auth_data->timeout)) { 3907 if (ifmgd->auth_data->done) { 3908 /* 3909 * ok ... we waited for assoc but userspace didn't, 3910 * so let's just kill the auth data 3911 */ 3912 ieee80211_destroy_auth_data(sdata, false); 3913 } else if (ieee80211_auth(sdata)) { 3914 u8 bssid[ETH_ALEN]; 3915 struct ieee80211_event event = { 3916 .type = MLME_EVENT, 3917 .u.mlme.data = AUTH_EVENT, 3918 .u.mlme.status = MLME_TIMEOUT, 3919 }; 3920 3921 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3922 3923 ieee80211_destroy_auth_data(sdata, false); 3924 3925 cfg80211_auth_timeout(sdata->dev, bssid); 3926 drv_event_callback(sdata->local, sdata, &event); 3927 } 3928 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3929 run_again(sdata, ifmgd->auth_data->timeout); 3930 3931 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3932 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3933 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3934 ieee80211_do_assoc(sdata)) { 3935 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3936 struct ieee80211_event event = { 3937 .type = MLME_EVENT, 3938 .u.mlme.data = ASSOC_EVENT, 3939 .u.mlme.status = MLME_TIMEOUT, 3940 }; 3941 3942 ieee80211_destroy_assoc_data(sdata, false, false); 3943 cfg80211_assoc_timeout(sdata->dev, bss); 3944 drv_event_callback(sdata->local, sdata, &event); 3945 } 3946 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3947 run_again(sdata, ifmgd->assoc_data->timeout); 3948 3949 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3950 ifmgd->associated) { 3951 u8 bssid[ETH_ALEN]; 3952 int max_tries; 3953 3954 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3955 3956 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3957 max_tries = max_nullfunc_tries; 3958 else 3959 max_tries = max_probe_tries; 3960 3961 /* ACK received for nullfunc probing frame */ 3962 if (!ifmgd->probe_send_count) 3963 ieee80211_reset_ap_probe(sdata); 3964 else if (ifmgd->nullfunc_failed) { 3965 if (ifmgd->probe_send_count < max_tries) { 3966 mlme_dbg(sdata, 3967 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3968 bssid, ifmgd->probe_send_count, 3969 max_tries); 3970 ieee80211_mgd_probe_ap_send(sdata); 3971 } else { 3972 mlme_dbg(sdata, 3973 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3974 bssid); 3975 ieee80211_sta_connection_lost(sdata, bssid, 3976 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3977 false); 3978 } 3979 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3980 run_again(sdata, ifmgd->probe_timeout); 3981 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3982 mlme_dbg(sdata, 3983 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3984 bssid, probe_wait_ms); 3985 ieee80211_sta_connection_lost(sdata, bssid, 3986 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3987 } else if (ifmgd->probe_send_count < max_tries) { 3988 mlme_dbg(sdata, 3989 "No probe response from AP %pM after %dms, try %d/%i\n", 3990 bssid, probe_wait_ms, 3991 ifmgd->probe_send_count, max_tries); 3992 ieee80211_mgd_probe_ap_send(sdata); 3993 } else { 3994 /* 3995 * We actually lost the connection ... or did we? 3996 * Let's make sure! 3997 */ 3998 mlme_dbg(sdata, 3999 "No probe response from AP %pM after %dms, disconnecting.\n", 4000 bssid, probe_wait_ms); 4001 4002 ieee80211_sta_connection_lost(sdata, bssid, 4003 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4004 } 4005 } 4006 4007 sdata_unlock(sdata); 4008 } 4009 4010 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4011 { 4012 struct ieee80211_sub_if_data *sdata = 4013 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4015 4016 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4017 return; 4018 4019 sdata->u.mgd.connection_loss = false; 4020 ieee80211_queue_work(&sdata->local->hw, 4021 &sdata->u.mgd.beacon_connection_loss_work); 4022 } 4023 4024 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4025 { 4026 struct ieee80211_sub_if_data *sdata = 4027 from_timer(sdata, t, u.mgd.conn_mon_timer); 4028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4029 struct ieee80211_local *local = sdata->local; 4030 4031 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4032 return; 4033 4034 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4035 } 4036 4037 static void ieee80211_sta_monitor_work(struct work_struct *work) 4038 { 4039 struct ieee80211_sub_if_data *sdata = 4040 container_of(work, struct ieee80211_sub_if_data, 4041 u.mgd.monitor_work); 4042 4043 ieee80211_mgd_probe_ap(sdata, false); 4044 } 4045 4046 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4047 { 4048 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4049 __ieee80211_stop_poll(sdata); 4050 4051 /* let's probe the connection once */ 4052 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4053 ieee80211_queue_work(&sdata->local->hw, 4054 &sdata->u.mgd.monitor_work); 4055 } 4056 } 4057 4058 #ifdef CONFIG_PM 4059 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4060 { 4061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4062 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4063 4064 sdata_lock(sdata); 4065 4066 if (ifmgd->auth_data || ifmgd->assoc_data) { 4067 const u8 *bssid = ifmgd->auth_data ? 4068 ifmgd->auth_data->bss->bssid : 4069 ifmgd->assoc_data->bss->bssid; 4070 4071 /* 4072 * If we are trying to authenticate / associate while suspending, 4073 * cfg80211 won't know and won't actually abort those attempts, 4074 * thus we need to do that ourselves. 4075 */ 4076 ieee80211_send_deauth_disassoc(sdata, bssid, 4077 IEEE80211_STYPE_DEAUTH, 4078 WLAN_REASON_DEAUTH_LEAVING, 4079 false, frame_buf); 4080 if (ifmgd->assoc_data) 4081 ieee80211_destroy_assoc_data(sdata, false, true); 4082 if (ifmgd->auth_data) 4083 ieee80211_destroy_auth_data(sdata, false); 4084 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4085 IEEE80211_DEAUTH_FRAME_LEN); 4086 } 4087 4088 /* This is a bit of a hack - we should find a better and more generic 4089 * solution to this. Normally when suspending, cfg80211 will in fact 4090 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4091 * auth (not so important) or assoc (this is the problem) process. 4092 * 4093 * As a consequence, it can happen that we are in the process of both 4094 * associating and suspending, and receive an association response 4095 * after cfg80211 has checked if it needs to disconnect, but before 4096 * we actually set the flag to drop incoming frames. This will then 4097 * cause the workqueue flush to process the association response in 4098 * the suspend, resulting in a successful association just before it 4099 * tries to remove the interface from the driver, which now though 4100 * has a channel context assigned ... this results in issues. 4101 * 4102 * To work around this (for now) simply deauth here again if we're 4103 * now connected. 4104 */ 4105 if (ifmgd->associated && !sdata->local->wowlan) { 4106 u8 bssid[ETH_ALEN]; 4107 struct cfg80211_deauth_request req = { 4108 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4109 .bssid = bssid, 4110 }; 4111 4112 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4113 ieee80211_mgd_deauth(sdata, &req); 4114 } 4115 4116 sdata_unlock(sdata); 4117 } 4118 4119 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4120 { 4121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4122 4123 sdata_lock(sdata); 4124 if (!ifmgd->associated) { 4125 sdata_unlock(sdata); 4126 return; 4127 } 4128 4129 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4130 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4131 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4132 ieee80211_sta_connection_lost(sdata, 4133 ifmgd->associated->bssid, 4134 WLAN_REASON_UNSPECIFIED, 4135 true); 4136 sdata_unlock(sdata); 4137 return; 4138 } 4139 sdata_unlock(sdata); 4140 } 4141 #endif 4142 4143 /* interface setup */ 4144 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4145 { 4146 struct ieee80211_if_managed *ifmgd; 4147 4148 ifmgd = &sdata->u.mgd; 4149 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4150 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4151 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4152 ieee80211_beacon_connection_loss_work); 4153 INIT_WORK(&ifmgd->csa_connection_drop_work, 4154 ieee80211_csa_connection_drop_work); 4155 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4156 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4157 ieee80211_tdls_peer_del_work); 4158 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4159 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4160 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4161 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4162 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4163 ieee80211_sta_handle_tspec_ac_params_wk); 4164 4165 ifmgd->flags = 0; 4166 ifmgd->powersave = sdata->wdev.ps; 4167 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4168 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4169 ifmgd->p2p_noa_index = -1; 4170 4171 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4172 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4173 else 4174 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4175 4176 /* Setup TDLS data */ 4177 spin_lock_init(&ifmgd->teardown_lock); 4178 ifmgd->teardown_skb = NULL; 4179 ifmgd->orig_teardown_skb = NULL; 4180 } 4181 4182 /* scan finished notification */ 4183 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4184 { 4185 struct ieee80211_sub_if_data *sdata; 4186 4187 /* Restart STA timers */ 4188 rcu_read_lock(); 4189 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4190 if (ieee80211_sdata_running(sdata)) 4191 ieee80211_restart_sta_timer(sdata); 4192 } 4193 rcu_read_unlock(); 4194 } 4195 4196 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4197 struct cfg80211_bss *cbss) 4198 { 4199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4200 const u8 *ht_cap_ie, *vht_cap_ie; 4201 const struct ieee80211_ht_cap *ht_cap; 4202 const struct ieee80211_vht_cap *vht_cap; 4203 u8 chains = 1; 4204 4205 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4206 return chains; 4207 4208 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4209 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4210 ht_cap = (void *)(ht_cap_ie + 2); 4211 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4212 /* 4213 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4214 * "Tx Unequal Modulation Supported" fields. 4215 */ 4216 } 4217 4218 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4219 return chains; 4220 4221 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4222 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4223 u8 nss; 4224 u16 tx_mcs_map; 4225 4226 vht_cap = (void *)(vht_cap_ie + 2); 4227 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4228 for (nss = 8; nss > 0; nss--) { 4229 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4230 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4231 break; 4232 } 4233 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4234 chains = max(chains, nss); 4235 } 4236 4237 return chains; 4238 } 4239 4240 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4241 struct cfg80211_bss *cbss) 4242 { 4243 struct ieee80211_local *local = sdata->local; 4244 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4245 const struct ieee80211_ht_cap *ht_cap = NULL; 4246 const struct ieee80211_ht_operation *ht_oper = NULL; 4247 const struct ieee80211_vht_operation *vht_oper = NULL; 4248 struct ieee80211_supported_band *sband; 4249 struct cfg80211_chan_def chandef; 4250 int ret; 4251 u32 i; 4252 bool have_80mhz; 4253 4254 sband = local->hw.wiphy->bands[cbss->channel->band]; 4255 4256 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4257 IEEE80211_STA_DISABLE_80P80MHZ | 4258 IEEE80211_STA_DISABLE_160MHZ); 4259 4260 rcu_read_lock(); 4261 4262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4263 sband->ht_cap.ht_supported) { 4264 const u8 *ht_oper_ie, *ht_cap_ie; 4265 4266 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4267 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4268 ht_oper = (void *)(ht_oper_ie + 2); 4269 4270 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4271 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4272 ht_cap = (void *)(ht_cap_ie + 2); 4273 4274 if (!ht_cap) { 4275 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4276 ht_oper = NULL; 4277 } 4278 } 4279 4280 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4281 sband->vht_cap.vht_supported) { 4282 const u8 *vht_oper_ie, *vht_cap; 4283 4284 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4285 WLAN_EID_VHT_OPERATION); 4286 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4287 vht_oper = (void *)(vht_oper_ie + 2); 4288 if (vht_oper && !ht_oper) { 4289 vht_oper = NULL; 4290 sdata_info(sdata, 4291 "AP advertised VHT without HT, disabling both\n"); 4292 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4294 } 4295 4296 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4297 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4298 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4299 vht_oper = NULL; 4300 } 4301 } 4302 4303 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4304 have_80mhz = false; 4305 for (i = 0; i < sband->n_channels; i++) { 4306 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4307 IEEE80211_CHAN_NO_80MHZ)) 4308 continue; 4309 4310 have_80mhz = true; 4311 break; 4312 } 4313 4314 if (!have_80mhz) 4315 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4316 4317 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4318 cbss->channel, 4319 ht_oper, vht_oper, 4320 &chandef, false); 4321 4322 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4323 local->rx_chains); 4324 4325 rcu_read_unlock(); 4326 4327 /* will change later if needed */ 4328 sdata->smps_mode = IEEE80211_SMPS_OFF; 4329 4330 mutex_lock(&local->mtx); 4331 /* 4332 * If this fails (possibly due to channel context sharing 4333 * on incompatible channels, e.g. 80+80 and 160 sharing the 4334 * same control channel) try to use a smaller bandwidth. 4335 */ 4336 ret = ieee80211_vif_use_channel(sdata, &chandef, 4337 IEEE80211_CHANCTX_SHARED); 4338 4339 /* don't downgrade for 5 and 10 MHz channels, though. */ 4340 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4341 chandef.width == NL80211_CHAN_WIDTH_10) 4342 goto out; 4343 4344 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4345 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4346 ret = ieee80211_vif_use_channel(sdata, &chandef, 4347 IEEE80211_CHANCTX_SHARED); 4348 } 4349 out: 4350 mutex_unlock(&local->mtx); 4351 return ret; 4352 } 4353 4354 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4355 struct cfg80211_bss *cbss, bool assoc, 4356 bool override) 4357 { 4358 struct ieee80211_local *local = sdata->local; 4359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4360 struct ieee80211_bss *bss = (void *)cbss->priv; 4361 struct sta_info *new_sta = NULL; 4362 struct ieee80211_supported_band *sband; 4363 bool have_sta = false; 4364 int err; 4365 4366 sband = local->hw.wiphy->bands[cbss->channel->band]; 4367 4368 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4369 return -EINVAL; 4370 4371 /* If a reconfig is happening, bail out */ 4372 if (local->in_reconfig) 4373 return -EBUSY; 4374 4375 if (assoc) { 4376 rcu_read_lock(); 4377 have_sta = sta_info_get(sdata, cbss->bssid); 4378 rcu_read_unlock(); 4379 } 4380 4381 if (!have_sta) { 4382 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4383 if (!new_sta) 4384 return -ENOMEM; 4385 } 4386 4387 /* 4388 * Set up the information for the new channel before setting the 4389 * new channel. We can't - completely race-free - change the basic 4390 * rates bitmap and the channel (sband) that it refers to, but if 4391 * we set it up before we at least avoid calling into the driver's 4392 * bss_info_changed() method with invalid information (since we do 4393 * call that from changing the channel - only for IDLE and perhaps 4394 * some others, but ...). 4395 * 4396 * So to avoid that, just set up all the new information before the 4397 * channel, but tell the driver to apply it only afterwards, since 4398 * it might need the new channel for that. 4399 */ 4400 if (new_sta) { 4401 u32 rates = 0, basic_rates = 0; 4402 bool have_higher_than_11mbit; 4403 int min_rate = INT_MAX, min_rate_index = -1; 4404 const struct cfg80211_bss_ies *ies; 4405 int shift = ieee80211_vif_get_shift(&sdata->vif); 4406 4407 ieee80211_get_rates(sband, bss->supp_rates, 4408 bss->supp_rates_len, 4409 &rates, &basic_rates, 4410 &have_higher_than_11mbit, 4411 &min_rate, &min_rate_index, 4412 shift); 4413 4414 /* 4415 * This used to be a workaround for basic rates missing 4416 * in the association response frame. Now that we no 4417 * longer use the basic rates from there, it probably 4418 * doesn't happen any more, but keep the workaround so 4419 * in case some *other* APs are buggy in different ways 4420 * we can connect -- with a warning. 4421 */ 4422 if (!basic_rates && min_rate_index >= 0) { 4423 sdata_info(sdata, 4424 "No basic rates, using min rate instead\n"); 4425 basic_rates = BIT(min_rate_index); 4426 } 4427 4428 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4429 sdata->vif.bss_conf.basic_rates = basic_rates; 4430 4431 /* cf. IEEE 802.11 9.2.12 */ 4432 if (cbss->channel->band == NL80211_BAND_2GHZ && 4433 have_higher_than_11mbit) 4434 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4435 else 4436 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4437 4438 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4439 4440 /* set timing information */ 4441 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4442 rcu_read_lock(); 4443 ies = rcu_dereference(cbss->beacon_ies); 4444 if (ies) { 4445 const u8 *tim_ie; 4446 4447 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4448 sdata->vif.bss_conf.sync_device_ts = 4449 bss->device_ts_beacon; 4450 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4451 ies->data, ies->len); 4452 if (tim_ie && tim_ie[1] >= 2) 4453 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4454 else 4455 sdata->vif.bss_conf.sync_dtim_count = 0; 4456 } else if (!ieee80211_hw_check(&sdata->local->hw, 4457 TIMING_BEACON_ONLY)) { 4458 ies = rcu_dereference(cbss->proberesp_ies); 4459 /* must be non-NULL since beacon IEs were NULL */ 4460 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4461 sdata->vif.bss_conf.sync_device_ts = 4462 bss->device_ts_presp; 4463 sdata->vif.bss_conf.sync_dtim_count = 0; 4464 } else { 4465 sdata->vif.bss_conf.sync_tsf = 0; 4466 sdata->vif.bss_conf.sync_device_ts = 0; 4467 sdata->vif.bss_conf.sync_dtim_count = 0; 4468 } 4469 rcu_read_unlock(); 4470 } 4471 4472 if (new_sta || override) { 4473 err = ieee80211_prep_channel(sdata, cbss); 4474 if (err) { 4475 if (new_sta) 4476 sta_info_free(local, new_sta); 4477 return -EINVAL; 4478 } 4479 } 4480 4481 if (new_sta) { 4482 /* 4483 * tell driver about BSSID, basic rates and timing 4484 * this was set up above, before setting the channel 4485 */ 4486 ieee80211_bss_info_change_notify(sdata, 4487 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4488 BSS_CHANGED_BEACON_INT); 4489 4490 if (assoc) 4491 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4492 4493 err = sta_info_insert(new_sta); 4494 new_sta = NULL; 4495 if (err) { 4496 sdata_info(sdata, 4497 "failed to insert STA entry for the AP (error %d)\n", 4498 err); 4499 return err; 4500 } 4501 } else 4502 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4503 4504 /* Cancel scan to ensure that nothing interferes with connection */ 4505 if (local->scanning) 4506 ieee80211_scan_cancel(local); 4507 4508 return 0; 4509 } 4510 4511 /* config hooks */ 4512 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4513 struct cfg80211_auth_request *req) 4514 { 4515 struct ieee80211_local *local = sdata->local; 4516 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4517 struct ieee80211_mgd_auth_data *auth_data; 4518 u16 auth_alg; 4519 int err; 4520 4521 /* prepare auth data structure */ 4522 4523 switch (req->auth_type) { 4524 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4525 auth_alg = WLAN_AUTH_OPEN; 4526 break; 4527 case NL80211_AUTHTYPE_SHARED_KEY: 4528 if (IS_ERR(local->wep_tx_tfm)) 4529 return -EOPNOTSUPP; 4530 auth_alg = WLAN_AUTH_SHARED_KEY; 4531 break; 4532 case NL80211_AUTHTYPE_FT: 4533 auth_alg = WLAN_AUTH_FT; 4534 break; 4535 case NL80211_AUTHTYPE_NETWORK_EAP: 4536 auth_alg = WLAN_AUTH_LEAP; 4537 break; 4538 case NL80211_AUTHTYPE_SAE: 4539 auth_alg = WLAN_AUTH_SAE; 4540 break; 4541 case NL80211_AUTHTYPE_FILS_SK: 4542 auth_alg = WLAN_AUTH_FILS_SK; 4543 break; 4544 case NL80211_AUTHTYPE_FILS_SK_PFS: 4545 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4546 break; 4547 case NL80211_AUTHTYPE_FILS_PK: 4548 auth_alg = WLAN_AUTH_FILS_PK; 4549 break; 4550 default: 4551 return -EOPNOTSUPP; 4552 } 4553 4554 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4555 req->ie_len, GFP_KERNEL); 4556 if (!auth_data) 4557 return -ENOMEM; 4558 4559 auth_data->bss = req->bss; 4560 4561 if (req->auth_data_len >= 4) { 4562 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4563 __le16 *pos = (__le16 *) req->auth_data; 4564 4565 auth_data->sae_trans = le16_to_cpu(pos[0]); 4566 auth_data->sae_status = le16_to_cpu(pos[1]); 4567 } 4568 memcpy(auth_data->data, req->auth_data + 4, 4569 req->auth_data_len - 4); 4570 auth_data->data_len += req->auth_data_len - 4; 4571 } 4572 4573 if (req->ie && req->ie_len) { 4574 memcpy(&auth_data->data[auth_data->data_len], 4575 req->ie, req->ie_len); 4576 auth_data->data_len += req->ie_len; 4577 } 4578 4579 if (req->key && req->key_len) { 4580 auth_data->key_len = req->key_len; 4581 auth_data->key_idx = req->key_idx; 4582 memcpy(auth_data->key, req->key, req->key_len); 4583 } 4584 4585 auth_data->algorithm = auth_alg; 4586 4587 /* try to authenticate/probe */ 4588 4589 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4590 ifmgd->assoc_data) { 4591 err = -EBUSY; 4592 goto err_free; 4593 } 4594 4595 if (ifmgd->auth_data) 4596 ieee80211_destroy_auth_data(sdata, false); 4597 4598 /* prep auth_data so we don't go into idle on disassoc */ 4599 ifmgd->auth_data = auth_data; 4600 4601 if (ifmgd->associated) { 4602 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4603 4604 sdata_info(sdata, 4605 "disconnect from AP %pM for new auth to %pM\n", 4606 ifmgd->associated->bssid, req->bss->bssid); 4607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4608 WLAN_REASON_UNSPECIFIED, 4609 false, frame_buf); 4610 4611 ieee80211_report_disconnect(sdata, frame_buf, 4612 sizeof(frame_buf), true, 4613 WLAN_REASON_UNSPECIFIED); 4614 } 4615 4616 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4617 4618 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4619 if (err) 4620 goto err_clear; 4621 4622 err = ieee80211_auth(sdata); 4623 if (err) { 4624 sta_info_destroy_addr(sdata, req->bss->bssid); 4625 goto err_clear; 4626 } 4627 4628 /* hold our own reference */ 4629 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4630 return 0; 4631 4632 err_clear: 4633 eth_zero_addr(ifmgd->bssid); 4634 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4635 ifmgd->auth_data = NULL; 4636 mutex_lock(&sdata->local->mtx); 4637 ieee80211_vif_release_channel(sdata); 4638 mutex_unlock(&sdata->local->mtx); 4639 err_free: 4640 kfree(auth_data); 4641 return err; 4642 } 4643 4644 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4645 struct cfg80211_assoc_request *req) 4646 { 4647 struct ieee80211_local *local = sdata->local; 4648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4649 struct ieee80211_bss *bss = (void *)req->bss->priv; 4650 struct ieee80211_mgd_assoc_data *assoc_data; 4651 const struct cfg80211_bss_ies *beacon_ies; 4652 struct ieee80211_supported_band *sband; 4653 const u8 *ssidie, *ht_ie, *vht_ie; 4654 int i, err; 4655 bool override = false; 4656 4657 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4658 if (!assoc_data) 4659 return -ENOMEM; 4660 4661 rcu_read_lock(); 4662 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4663 if (!ssidie) { 4664 rcu_read_unlock(); 4665 kfree(assoc_data); 4666 return -EINVAL; 4667 } 4668 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4669 assoc_data->ssid_len = ssidie[1]; 4670 rcu_read_unlock(); 4671 4672 if (ifmgd->associated) { 4673 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4674 4675 sdata_info(sdata, 4676 "disconnect from AP %pM for new assoc to %pM\n", 4677 ifmgd->associated->bssid, req->bss->bssid); 4678 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4679 WLAN_REASON_UNSPECIFIED, 4680 false, frame_buf); 4681 4682 ieee80211_report_disconnect(sdata, frame_buf, 4683 sizeof(frame_buf), true, 4684 WLAN_REASON_UNSPECIFIED); 4685 } 4686 4687 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4688 err = -EBUSY; 4689 goto err_free; 4690 } 4691 4692 if (ifmgd->assoc_data) { 4693 err = -EBUSY; 4694 goto err_free; 4695 } 4696 4697 if (ifmgd->auth_data) { 4698 bool match; 4699 4700 /* keep sta info, bssid if matching */ 4701 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4702 ieee80211_destroy_auth_data(sdata, match); 4703 } 4704 4705 /* prepare assoc data */ 4706 4707 ifmgd->beacon_crc_valid = false; 4708 4709 assoc_data->wmm = bss->wmm_used && 4710 (local->hw.queues >= IEEE80211_NUM_ACS); 4711 4712 /* 4713 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4714 * We still associate in non-HT mode (11a/b/g) if any one of these 4715 * ciphers is configured as pairwise. 4716 * We can set this to true for non-11n hardware, that'll be checked 4717 * separately along with the peer capabilities. 4718 */ 4719 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4720 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4721 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4722 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4723 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4724 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4725 netdev_info(sdata->dev, 4726 "disabling HT/VHT due to WEP/TKIP use\n"); 4727 } 4728 } 4729 4730 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4731 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4732 if (!sband->ht_cap.ht_supported || 4733 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4734 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4735 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4736 if (!bss->wmm_used && 4737 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4738 netdev_info(sdata->dev, 4739 "disabling HT as WMM/QoS is not supported by the AP\n"); 4740 } 4741 4742 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4743 if (!sband->vht_cap.vht_supported || 4744 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4745 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4746 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4747 if (!bss->wmm_used && 4748 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4749 netdev_info(sdata->dev, 4750 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4751 } 4752 4753 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4754 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4755 sizeof(ifmgd->ht_capa_mask)); 4756 4757 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4758 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4759 sizeof(ifmgd->vht_capa_mask)); 4760 4761 if (req->ie && req->ie_len) { 4762 memcpy(assoc_data->ie, req->ie, req->ie_len); 4763 assoc_data->ie_len = req->ie_len; 4764 } 4765 4766 if (req->fils_kek) { 4767 /* should already be checked in cfg80211 - so warn */ 4768 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4769 err = -EINVAL; 4770 goto err_free; 4771 } 4772 memcpy(assoc_data->fils_kek, req->fils_kek, 4773 req->fils_kek_len); 4774 assoc_data->fils_kek_len = req->fils_kek_len; 4775 } 4776 4777 if (req->fils_nonces) 4778 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4779 2 * FILS_NONCE_LEN); 4780 4781 assoc_data->bss = req->bss; 4782 4783 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4784 if (ifmgd->powersave) 4785 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4786 else 4787 sdata->smps_mode = IEEE80211_SMPS_OFF; 4788 } else 4789 sdata->smps_mode = ifmgd->req_smps; 4790 4791 assoc_data->capability = req->bss->capability; 4792 assoc_data->supp_rates = bss->supp_rates; 4793 assoc_data->supp_rates_len = bss->supp_rates_len; 4794 4795 rcu_read_lock(); 4796 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4797 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4798 assoc_data->ap_ht_param = 4799 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4800 else 4801 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4802 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4803 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4804 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4805 sizeof(struct ieee80211_vht_cap)); 4806 else 4807 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4808 rcu_read_unlock(); 4809 4810 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4811 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4812 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4813 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4814 4815 if (bss->wmm_used && bss->uapsd_supported && 4816 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4817 assoc_data->uapsd = true; 4818 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4819 } else { 4820 assoc_data->uapsd = false; 4821 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4822 } 4823 4824 if (req->prev_bssid) 4825 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4826 4827 if (req->use_mfp) { 4828 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4829 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4830 } else { 4831 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4832 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4833 } 4834 4835 if (req->flags & ASSOC_REQ_USE_RRM) 4836 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4837 else 4838 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4839 4840 if (req->crypto.control_port) 4841 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4842 else 4843 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4844 4845 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4846 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4847 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4848 sdata->vif.type); 4849 4850 /* kick off associate process */ 4851 4852 ifmgd->assoc_data = assoc_data; 4853 ifmgd->dtim_period = 0; 4854 ifmgd->have_beacon = false; 4855 4856 /* override HT/VHT configuration only if the AP and we support it */ 4857 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4858 struct ieee80211_sta_ht_cap sta_ht_cap; 4859 4860 if (req->flags & ASSOC_REQ_DISABLE_HT) 4861 override = true; 4862 4863 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4864 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4865 4866 /* check for 40 MHz disable override */ 4867 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4868 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4869 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4870 override = true; 4871 4872 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4873 req->flags & ASSOC_REQ_DISABLE_VHT) 4874 override = true; 4875 } 4876 4877 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4878 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4879 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4880 } 4881 4882 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4883 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4884 4885 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4886 if (err) 4887 goto err_clear; 4888 4889 rcu_read_lock(); 4890 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4891 4892 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4893 !beacon_ies) { 4894 /* 4895 * Wait up to one beacon interval ... 4896 * should this be more if we miss one? 4897 */ 4898 sdata_info(sdata, "waiting for beacon from %pM\n", 4899 ifmgd->bssid); 4900 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4901 assoc_data->timeout_started = true; 4902 assoc_data->need_beacon = true; 4903 } else if (beacon_ies) { 4904 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4905 beacon_ies->data, 4906 beacon_ies->len); 4907 u8 dtim_count = 0; 4908 4909 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4910 const struct ieee80211_tim_ie *tim; 4911 tim = (void *)(tim_ie + 2); 4912 ifmgd->dtim_period = tim->dtim_period; 4913 dtim_count = tim->dtim_count; 4914 } 4915 ifmgd->have_beacon = true; 4916 assoc_data->timeout = jiffies; 4917 assoc_data->timeout_started = true; 4918 4919 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4920 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4921 sdata->vif.bss_conf.sync_device_ts = 4922 bss->device_ts_beacon; 4923 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4924 } 4925 } else { 4926 assoc_data->timeout = jiffies; 4927 assoc_data->timeout_started = true; 4928 } 4929 rcu_read_unlock(); 4930 4931 run_again(sdata, assoc_data->timeout); 4932 4933 if (bss->corrupt_data) { 4934 char *corrupt_type = "data"; 4935 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4936 if (bss->corrupt_data & 4937 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4938 corrupt_type = "beacon and probe response"; 4939 else 4940 corrupt_type = "beacon"; 4941 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4942 corrupt_type = "probe response"; 4943 sdata_info(sdata, "associating with AP with corrupt %s\n", 4944 corrupt_type); 4945 } 4946 4947 return 0; 4948 err_clear: 4949 eth_zero_addr(ifmgd->bssid); 4950 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4951 ifmgd->assoc_data = NULL; 4952 err_free: 4953 kfree(assoc_data); 4954 return err; 4955 } 4956 4957 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4958 struct cfg80211_deauth_request *req) 4959 { 4960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4961 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4962 bool tx = !req->local_state_change; 4963 4964 if (ifmgd->auth_data && 4965 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4966 sdata_info(sdata, 4967 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4968 req->bssid, req->reason_code, 4969 ieee80211_get_reason_code_string(req->reason_code)); 4970 4971 drv_mgd_prepare_tx(sdata->local, sdata); 4972 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4973 IEEE80211_STYPE_DEAUTH, 4974 req->reason_code, tx, 4975 frame_buf); 4976 ieee80211_destroy_auth_data(sdata, false); 4977 ieee80211_report_disconnect(sdata, frame_buf, 4978 sizeof(frame_buf), true, 4979 req->reason_code); 4980 4981 return 0; 4982 } 4983 4984 if (ifmgd->assoc_data && 4985 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4986 sdata_info(sdata, 4987 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4988 req->bssid, req->reason_code, 4989 ieee80211_get_reason_code_string(req->reason_code)); 4990 4991 drv_mgd_prepare_tx(sdata->local, sdata); 4992 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4993 IEEE80211_STYPE_DEAUTH, 4994 req->reason_code, tx, 4995 frame_buf); 4996 ieee80211_destroy_assoc_data(sdata, false, true); 4997 ieee80211_report_disconnect(sdata, frame_buf, 4998 sizeof(frame_buf), true, 4999 req->reason_code); 5000 return 0; 5001 } 5002 5003 if (ifmgd->associated && 5004 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5005 sdata_info(sdata, 5006 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5007 req->bssid, req->reason_code, 5008 ieee80211_get_reason_code_string(req->reason_code)); 5009 5010 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5011 req->reason_code, tx, frame_buf); 5012 ieee80211_report_disconnect(sdata, frame_buf, 5013 sizeof(frame_buf), true, 5014 req->reason_code); 5015 return 0; 5016 } 5017 5018 return -ENOTCONN; 5019 } 5020 5021 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5022 struct cfg80211_disassoc_request *req) 5023 { 5024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5025 u8 bssid[ETH_ALEN]; 5026 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5027 5028 /* 5029 * cfg80211 should catch this ... but it's racy since 5030 * we can receive a disassoc frame, process it, hand it 5031 * to cfg80211 while that's in a locked section already 5032 * trying to tell us that the user wants to disconnect. 5033 */ 5034 if (ifmgd->associated != req->bss) 5035 return -ENOLINK; 5036 5037 sdata_info(sdata, 5038 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5039 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5040 5041 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5042 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5043 req->reason_code, !req->local_state_change, 5044 frame_buf); 5045 5046 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5047 req->reason_code); 5048 5049 return 0; 5050 } 5051 5052 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5053 { 5054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5055 5056 /* 5057 * Make sure some work items will not run after this, 5058 * they will not do anything but might not have been 5059 * cancelled when disconnecting. 5060 */ 5061 cancel_work_sync(&ifmgd->monitor_work); 5062 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5063 cancel_work_sync(&ifmgd->request_smps_work); 5064 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5065 cancel_work_sync(&ifmgd->chswitch_work); 5066 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5067 5068 sdata_lock(sdata); 5069 if (ifmgd->assoc_data) { 5070 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5071 ieee80211_destroy_assoc_data(sdata, false, false); 5072 cfg80211_assoc_timeout(sdata->dev, bss); 5073 } 5074 if (ifmgd->auth_data) 5075 ieee80211_destroy_auth_data(sdata, false); 5076 spin_lock_bh(&ifmgd->teardown_lock); 5077 if (ifmgd->teardown_skb) { 5078 kfree_skb(ifmgd->teardown_skb); 5079 ifmgd->teardown_skb = NULL; 5080 ifmgd->orig_teardown_skb = NULL; 5081 } 5082 spin_unlock_bh(&ifmgd->teardown_lock); 5083 del_timer_sync(&ifmgd->timer); 5084 sdata_unlock(sdata); 5085 } 5086 5087 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5088 enum nl80211_cqm_rssi_threshold_event rssi_event, 5089 s32 rssi_level, 5090 gfp_t gfp) 5091 { 5092 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5093 5094 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5095 5096 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5097 } 5098 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5099 5100 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5101 { 5102 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5103 5104 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5105 5106 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5107 } 5108 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5109