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 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/delay.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/etherdevice.h> 21 #include <linux/moduleparam.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 #include "fils_aead.h" 34 35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_cap *ht_cap, 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_cap || !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 if (!(ht_cap->cap_info & 174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 175 ret = IEEE80211_STA_DISABLE_40MHZ; 176 vht_chandef = *chandef; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 ieee80211_chandef_ht_oper(ht_oper, chandef); 202 } else { 203 /* 40 MHz (and 80 MHz) must be supported for VHT */ 204 ret = IEEE80211_STA_DISABLE_VHT; 205 /* also mark 40 MHz disabled */ 206 ret |= IEEE80211_STA_DISABLE_40MHZ; 207 goto out; 208 } 209 210 if (!vht_oper || !sband->vht_cap.vht_supported) { 211 ret = IEEE80211_STA_DISABLE_VHT; 212 goto out; 213 } 214 215 vht_chandef = *chandef; 216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 218 sdata_info(sdata, 219 "AP VHT information is invalid, disable VHT\n"); 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 if (!cfg80211_chandef_valid(&vht_chandef)) { 225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 226 sdata_info(sdata, 227 "AP VHT information is invalid, disable VHT\n"); 228 ret = IEEE80211_STA_DISABLE_VHT; 229 goto out; 230 } 231 232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 233 ret = 0; 234 goto out; 235 } 236 237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 239 sdata_info(sdata, 240 "AP VHT information doesn't match HT, disable VHT\n"); 241 ret = IEEE80211_STA_DISABLE_VHT; 242 goto out; 243 } 244 245 *chandef = vht_chandef; 246 247 ret = 0; 248 249 out: 250 /* 251 * When tracking the current AP, don't do any further checks if the 252 * new chandef is identical to the one we're currently using for the 253 * connection. This keeps us from playing ping-pong with regulatory, 254 * without it the following can happen (for example): 255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 256 * - AP advertises regdom US 257 * - CRDA loads regdom US with 80 MHz prohibited (old database) 258 * - the code below detects an unsupported channel, downgrades, and 259 * we disconnect from the AP in the caller 260 * - disconnect causes CRDA to reload world regdomain and the game 261 * starts anew. 262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 263 * 264 * It seems possible that there are still scenarios with CSA or real 265 * bandwidth changes where a this could happen, but those cases are 266 * less common and wouldn't completely prevent using the AP. 267 */ 268 if (tracking && 269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 270 return ret; 271 272 /* don't print the message below for VHT mismatch if VHT is disabled */ 273 if (ret & IEEE80211_STA_DISABLE_VHT) 274 vht_chandef = *chandef; 275 276 /* 277 * Ignore the DISABLED flag when we're already connected and only 278 * tracking the APs beacon for bandwidth changes - otherwise we 279 * might get disconnected here if we connect to an AP, update our 280 * regulatory information based on the AP's country IE and the 281 * information we have is wrong/outdated and disables the channel 282 * that we're actually using for the connection to the AP. 283 */ 284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 285 tracking ? 0 : 286 IEEE80211_CHAN_DISABLED)) { 287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 288 ret = IEEE80211_STA_DISABLE_HT | 289 IEEE80211_STA_DISABLE_VHT; 290 break; 291 } 292 293 ret |= ieee80211_chandef_downgrade(chandef); 294 } 295 296 if (chandef->width != vht_chandef.width && !tracking) 297 sdata_info(sdata, 298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 299 300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 301 return ret; 302 } 303 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 305 struct sta_info *sta, 306 const struct ieee80211_ht_cap *ht_cap, 307 const struct ieee80211_ht_operation *ht_oper, 308 const struct ieee80211_vht_operation *vht_oper, 309 const u8 *bssid, u32 *changed) 310 { 311 struct ieee80211_local *local = sdata->local; 312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 313 struct ieee80211_supported_band *sband; 314 struct ieee80211_channel *chan; 315 struct cfg80211_chan_def chandef; 316 u16 ht_opmode; 317 u32 flags; 318 enum ieee80211_sta_rx_bandwidth new_sta_bw; 319 int ret; 320 321 /* if HT was/is disabled, don't track any bandwidth changes */ 322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 323 return 0; 324 325 /* don't check VHT if we associated as non-VHT station */ 326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 327 vht_oper = NULL; 328 329 if (WARN_ON_ONCE(!sta)) 330 return -EINVAL; 331 332 /* 333 * if bss configuration changed store the new one - 334 * this may be applicable even if channel is identical 335 */ 336 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 338 *changed |= BSS_CHANGED_HT; 339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 340 } 341 342 chan = sdata->vif.bss_conf.chandef.chan; 343 sband = local->hw.wiphy->bands[chan->band]; 344 345 /* calculate new channel (type) based on HT/VHT operation IEs */ 346 flags = ieee80211_determine_chantype(sdata, sband, chan, 347 ht_cap, ht_oper, vht_oper, 348 &chandef, true); 349 350 /* 351 * Downgrade the new channel if we associated with restricted 352 * capabilities. For example, if we associated as a 20 MHz STA 353 * to a 40 MHz AP (due to regulatory, capabilities or config 354 * reasons) then switching to a 40 MHz channel now won't do us 355 * any good -- we couldn't use it with the AP. 356 */ 357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 358 chandef.width == NL80211_CHAN_WIDTH_80P80) 359 flags |= ieee80211_chandef_downgrade(&chandef); 360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 361 chandef.width == NL80211_CHAN_WIDTH_160) 362 flags |= ieee80211_chandef_downgrade(&chandef); 363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 364 chandef.width > NL80211_CHAN_WIDTH_20) 365 flags |= ieee80211_chandef_downgrade(&chandef); 366 367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 368 return 0; 369 370 sdata_info(sdata, 371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 372 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 373 chandef.center_freq1, chandef.center_freq2); 374 375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 376 IEEE80211_STA_DISABLE_VHT | 377 IEEE80211_STA_DISABLE_40MHZ | 378 IEEE80211_STA_DISABLE_80P80MHZ | 379 IEEE80211_STA_DISABLE_160MHZ)) || 380 !cfg80211_chandef_valid(&chandef)) { 381 sdata_info(sdata, 382 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 383 ifmgd->bssid); 384 return -EINVAL; 385 } 386 387 switch (chandef.width) { 388 case NL80211_CHAN_WIDTH_20_NOHT: 389 case NL80211_CHAN_WIDTH_20: 390 new_sta_bw = IEEE80211_STA_RX_BW_20; 391 break; 392 case NL80211_CHAN_WIDTH_40: 393 new_sta_bw = IEEE80211_STA_RX_BW_40; 394 break; 395 case NL80211_CHAN_WIDTH_80: 396 new_sta_bw = IEEE80211_STA_RX_BW_80; 397 break; 398 case NL80211_CHAN_WIDTH_80P80: 399 case NL80211_CHAN_WIDTH_160: 400 new_sta_bw = IEEE80211_STA_RX_BW_160; 401 break; 402 default: 403 return -EINVAL; 404 } 405 406 if (new_sta_bw > sta->cur_max_bandwidth) 407 new_sta_bw = sta->cur_max_bandwidth; 408 409 if (new_sta_bw < sta->sta.bandwidth) { 410 sta->sta.bandwidth = new_sta_bw; 411 rate_control_rate_update(local, sband, sta, 412 IEEE80211_RC_BW_CHANGED); 413 } 414 415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 416 if (ret) { 417 sdata_info(sdata, 418 "AP %pM changed bandwidth to incompatible one - disconnect\n", 419 ifmgd->bssid); 420 return ret; 421 } 422 423 if (new_sta_bw > sta->sta.bandwidth) { 424 sta->sta.bandwidth = new_sta_bw; 425 rate_control_rate_update(local, sband, sta, 426 IEEE80211_RC_BW_CHANGED); 427 } 428 429 return 0; 430 } 431 432 /* frame sending functions */ 433 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 435 struct sk_buff *skb, u8 ap_ht_param, 436 struct ieee80211_supported_band *sband, 437 struct ieee80211_channel *channel, 438 enum ieee80211_smps_mode smps) 439 { 440 u8 *pos; 441 u32 flags = channel->flags; 442 u16 cap; 443 struct ieee80211_sta_ht_cap ht_cap; 444 445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 446 447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 448 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 449 450 /* determine capability flags */ 451 cap = ht_cap.cap; 452 453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 457 cap &= ~IEEE80211_HT_CAP_SGI_40; 458 } 459 break; 460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 463 cap &= ~IEEE80211_HT_CAP_SGI_40; 464 } 465 break; 466 } 467 468 /* 469 * If 40 MHz was disabled associate as though we weren't 470 * capable of 40 MHz -- some broken APs will never fall 471 * back to trying to transmit in 20 MHz. 472 */ 473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 475 cap &= ~IEEE80211_HT_CAP_SGI_40; 476 } 477 478 /* set SM PS mode properly */ 479 cap &= ~IEEE80211_HT_CAP_SM_PS; 480 switch (smps) { 481 case IEEE80211_SMPS_AUTOMATIC: 482 case IEEE80211_SMPS_NUM_MODES: 483 WARN_ON(1); 484 case IEEE80211_SMPS_OFF: 485 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 486 IEEE80211_HT_CAP_SM_PS_SHIFT; 487 break; 488 case IEEE80211_SMPS_STATIC: 489 cap |= WLAN_HT_CAP_SM_PS_STATIC << 490 IEEE80211_HT_CAP_SM_PS_SHIFT; 491 break; 492 case IEEE80211_SMPS_DYNAMIC: 493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 494 IEEE80211_HT_CAP_SM_PS_SHIFT; 495 break; 496 } 497 498 /* reserve and fill IE */ 499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 501 } 502 503 /* This function determines vht capability flags for the association 504 * and builds the IE. 505 * Note - the function may set the owner of the MU-MIMO capability 506 */ 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 508 struct sk_buff *skb, 509 struct ieee80211_supported_band *sband, 510 struct ieee80211_vht_cap *ap_vht_cap) 511 { 512 struct ieee80211_local *local = sdata->local; 513 u8 *pos; 514 u32 cap; 515 struct ieee80211_sta_vht_cap vht_cap; 516 u32 mask, ap_bf_sts, our_bf_sts; 517 518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 519 520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 522 523 /* determine capability flags */ 524 cap = vht_cap.cap; 525 526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 528 529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 533 } 534 535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 538 } 539 540 /* 541 * Some APs apparently get confused if our capabilities are better 542 * than theirs, so restrict what we advertise in the assoc request. 543 */ 544 if (!(ap_vht_cap->vht_cap_info & 545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 548 else if (!(ap_vht_cap->vht_cap_info & 549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 551 552 /* 553 * If some other vif is using the MU-MIMO capablity we cannot associate 554 * using MU-MIMO - this will lead to contradictions in the group-id 555 * mechanism. 556 * Ownership is defined since association request, in order to avoid 557 * simultaneous associations with MU-MIMO. 558 */ 559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 560 bool disable_mu_mimo = false; 561 struct ieee80211_sub_if_data *other; 562 563 list_for_each_entry_rcu(other, &local->interfaces, list) { 564 if (other->vif.mu_mimo_owner) { 565 disable_mu_mimo = true; 566 break; 567 } 568 } 569 if (disable_mu_mimo) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 else 572 sdata->vif.mu_mimo_owner = true; 573 } 574 575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 576 577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 578 our_bf_sts = cap & mask; 579 580 if (ap_bf_sts < our_bf_sts) { 581 cap &= ~mask; 582 cap |= ap_bf_sts; 583 } 584 585 /* reserve and fill IE */ 586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 588 } 589 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 591 { 592 struct ieee80211_local *local = sdata->local; 593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 595 struct sk_buff *skb; 596 struct ieee80211_mgmt *mgmt; 597 u8 *pos, qos_info; 598 size_t offset = 0, noffset; 599 int i, count, rates_len, supp_rates_len, shift; 600 u16 capab; 601 struct ieee80211_supported_band *sband; 602 struct ieee80211_chanctx_conf *chanctx_conf; 603 struct ieee80211_channel *chan; 604 u32 rates = 0; 605 606 sdata_assert_lock(sdata); 607 608 rcu_read_lock(); 609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 610 if (WARN_ON(!chanctx_conf)) { 611 rcu_read_unlock(); 612 return; 613 } 614 chan = chanctx_conf->def.chan; 615 rcu_read_unlock(); 616 sband = local->hw.wiphy->bands[chan->band]; 617 shift = ieee80211_vif_get_shift(&sdata->vif); 618 619 if (assoc_data->supp_rates_len) { 620 /* 621 * Get all rates supported by the device and the AP as 622 * some APs don't like getting a superset of their rates 623 * in the association request (e.g. D-Link DAP 1353 in 624 * b-only mode)... 625 */ 626 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 627 assoc_data->supp_rates, 628 assoc_data->supp_rates_len, 629 &rates); 630 } else { 631 /* 632 * In case AP not provide any supported rates information 633 * before association, we send information element(s) with 634 * all rates that we support. 635 */ 636 rates_len = 0; 637 for (i = 0; i < sband->n_bitrates; i++) { 638 rates |= BIT(i); 639 rates_len++; 640 } 641 } 642 643 skb = alloc_skb(local->hw.extra_tx_headroom + 644 sizeof(*mgmt) + /* bit too much but doesn't matter */ 645 2 + assoc_data->ssid_len + /* SSID */ 646 4 + rates_len + /* (extended) rates */ 647 4 + /* power capability */ 648 2 + 2 * sband->n_channels + /* supported channels */ 649 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 650 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 651 assoc_data->ie_len + /* extra IEs */ 652 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 653 9, /* WMM */ 654 GFP_KERNEL); 655 if (!skb) 656 return; 657 658 skb_reserve(skb, local->hw.extra_tx_headroom); 659 660 capab = WLAN_CAPABILITY_ESS; 661 662 if (sband->band == NL80211_BAND_2GHZ) { 663 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 664 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 665 } 666 667 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 668 capab |= WLAN_CAPABILITY_PRIVACY; 669 670 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 671 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 672 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 673 674 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 675 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 676 677 mgmt = skb_put_zero(skb, 24); 678 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 679 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 680 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 681 682 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 683 skb_put(skb, 10); 684 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 685 IEEE80211_STYPE_REASSOC_REQ); 686 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 687 mgmt->u.reassoc_req.listen_interval = 688 cpu_to_le16(local->hw.conf.listen_interval); 689 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 690 ETH_ALEN); 691 } else { 692 skb_put(skb, 4); 693 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 694 IEEE80211_STYPE_ASSOC_REQ); 695 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 696 mgmt->u.assoc_req.listen_interval = 697 cpu_to_le16(local->hw.conf.listen_interval); 698 } 699 700 /* SSID */ 701 pos = skb_put(skb, 2 + assoc_data->ssid_len); 702 *pos++ = WLAN_EID_SSID; 703 *pos++ = assoc_data->ssid_len; 704 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 705 706 /* add all rates which were marked to be used above */ 707 supp_rates_len = rates_len; 708 if (supp_rates_len > 8) 709 supp_rates_len = 8; 710 711 pos = skb_put(skb, supp_rates_len + 2); 712 *pos++ = WLAN_EID_SUPP_RATES; 713 *pos++ = supp_rates_len; 714 715 count = 0; 716 for (i = 0; i < sband->n_bitrates; i++) { 717 if (BIT(i) & rates) { 718 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 719 5 * (1 << shift)); 720 *pos++ = (u8) rate; 721 if (++count == 8) 722 break; 723 } 724 } 725 726 if (rates_len > count) { 727 pos = skb_put(skb, rates_len - count + 2); 728 *pos++ = WLAN_EID_EXT_SUPP_RATES; 729 *pos++ = rates_len - count; 730 731 for (i++; i < sband->n_bitrates; i++) { 732 if (BIT(i) & rates) { 733 int rate; 734 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 735 5 * (1 << shift)); 736 *pos++ = (u8) rate; 737 } 738 } 739 } 740 741 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 742 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 743 pos = skb_put(skb, 4); 744 *pos++ = WLAN_EID_PWR_CAPABILITY; 745 *pos++ = 2; 746 *pos++ = 0; /* min tx power */ 747 /* max tx power */ 748 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 749 } 750 751 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 752 /* TODO: get this in reg domain format */ 753 pos = skb_put(skb, 2 * sband->n_channels + 2); 754 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 755 *pos++ = 2 * sband->n_channels; 756 for (i = 0; i < sband->n_channels; i++) { 757 *pos++ = ieee80211_frequency_to_channel( 758 sband->channels[i].center_freq); 759 *pos++ = 1; /* one channel in the subband*/ 760 } 761 } 762 763 /* if present, add any custom IEs that go before HT */ 764 if (assoc_data->ie_len) { 765 static const u8 before_ht[] = { 766 WLAN_EID_SSID, 767 WLAN_EID_SUPP_RATES, 768 WLAN_EID_EXT_SUPP_RATES, 769 WLAN_EID_PWR_CAPABILITY, 770 WLAN_EID_SUPPORTED_CHANNELS, 771 WLAN_EID_RSN, 772 WLAN_EID_QOS_CAPA, 773 WLAN_EID_RRM_ENABLED_CAPABILITIES, 774 WLAN_EID_MOBILITY_DOMAIN, 775 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 776 WLAN_EID_RIC_DATA, /* reassoc only */ 777 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 778 }; 779 static const u8 after_ric[] = { 780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 781 WLAN_EID_HT_CAPABILITY, 782 WLAN_EID_BSS_COEX_2040, 783 WLAN_EID_EXT_CAPABILITY, 784 WLAN_EID_QOS_TRAFFIC_CAPA, 785 WLAN_EID_TIM_BCAST_REQ, 786 WLAN_EID_INTERWORKING, 787 /* 60GHz doesn't happen right now */ 788 WLAN_EID_VHT_CAPABILITY, 789 WLAN_EID_OPMODE_NOTIF, 790 }; 791 792 noffset = ieee80211_ie_split_ric(assoc_data->ie, 793 assoc_data->ie_len, 794 before_ht, 795 ARRAY_SIZE(before_ht), 796 after_ric, 797 ARRAY_SIZE(after_ric), 798 offset); 799 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 800 offset = noffset; 801 } 802 803 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 804 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 805 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 806 807 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 808 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 809 sband, chan, sdata->smps_mode); 810 811 /* if present, add any custom IEs that go before VHT */ 812 if (assoc_data->ie_len) { 813 static const u8 before_vht[] = { 814 WLAN_EID_SSID, 815 WLAN_EID_SUPP_RATES, 816 WLAN_EID_EXT_SUPP_RATES, 817 WLAN_EID_PWR_CAPABILITY, 818 WLAN_EID_SUPPORTED_CHANNELS, 819 WLAN_EID_RSN, 820 WLAN_EID_QOS_CAPA, 821 WLAN_EID_RRM_ENABLED_CAPABILITIES, 822 WLAN_EID_MOBILITY_DOMAIN, 823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 824 WLAN_EID_HT_CAPABILITY, 825 WLAN_EID_BSS_COEX_2040, 826 WLAN_EID_EXT_CAPABILITY, 827 WLAN_EID_QOS_TRAFFIC_CAPA, 828 WLAN_EID_TIM_BCAST_REQ, 829 WLAN_EID_INTERWORKING, 830 }; 831 832 /* RIC already taken above, so no need to handle here anymore */ 833 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 834 before_vht, ARRAY_SIZE(before_vht), 835 offset); 836 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 837 offset = noffset; 838 } 839 840 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 841 ieee80211_add_vht_ie(sdata, skb, sband, 842 &assoc_data->ap_vht_cap); 843 844 /* if present, add any custom non-vendor IEs that go after HT */ 845 if (assoc_data->ie_len) { 846 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 847 assoc_data->ie_len, 848 offset); 849 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 850 offset = noffset; 851 } 852 853 if (assoc_data->wmm) { 854 if (assoc_data->uapsd) { 855 qos_info = ifmgd->uapsd_queues; 856 qos_info |= (ifmgd->uapsd_max_sp_len << 857 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 858 } else { 859 qos_info = 0; 860 } 861 862 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 863 } 864 865 /* add any remaining custom (i.e. vendor specific here) IEs */ 866 if (assoc_data->ie_len) { 867 noffset = assoc_data->ie_len; 868 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 869 } 870 871 if (assoc_data->fils_kek_len && 872 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 873 dev_kfree_skb(skb); 874 return; 875 } 876 877 drv_mgd_prepare_tx(local, sdata); 878 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 880 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 881 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 882 IEEE80211_TX_INTFL_MLME_CONN_TX; 883 ieee80211_tx_skb(sdata, skb); 884 } 885 886 void ieee80211_send_pspoll(struct ieee80211_local *local, 887 struct ieee80211_sub_if_data *sdata) 888 { 889 struct ieee80211_pspoll *pspoll; 890 struct sk_buff *skb; 891 892 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 893 if (!skb) 894 return; 895 896 pspoll = (struct ieee80211_pspoll *) skb->data; 897 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 898 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 900 ieee80211_tx_skb(sdata, skb); 901 } 902 903 void ieee80211_send_nullfunc(struct ieee80211_local *local, 904 struct ieee80211_sub_if_data *sdata, 905 bool powersave) 906 { 907 struct sk_buff *skb; 908 struct ieee80211_hdr_3addr *nullfunc; 909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 910 911 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 912 if (!skb) 913 return; 914 915 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 916 if (powersave) 917 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 918 919 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 920 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 921 922 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 924 925 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 926 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 927 928 ieee80211_tx_skb(sdata, skb); 929 } 930 931 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 932 struct ieee80211_sub_if_data *sdata) 933 { 934 struct sk_buff *skb; 935 struct ieee80211_hdr *nullfunc; 936 __le16 fc; 937 938 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 939 return; 940 941 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 942 if (!skb) 943 return; 944 945 skb_reserve(skb, local->hw.extra_tx_headroom); 946 947 nullfunc = skb_put_zero(skb, 30); 948 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 949 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 950 nullfunc->frame_control = fc; 951 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 952 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 953 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 954 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 955 956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 957 ieee80211_tx_skb(sdata, skb); 958 } 959 960 /* spectrum management related things */ 961 static void ieee80211_chswitch_work(struct work_struct *work) 962 { 963 struct ieee80211_sub_if_data *sdata = 964 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 965 struct ieee80211_local *local = sdata->local; 966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 967 int ret; 968 969 if (!ieee80211_sdata_running(sdata)) 970 return; 971 972 sdata_lock(sdata); 973 mutex_lock(&local->mtx); 974 mutex_lock(&local->chanctx_mtx); 975 976 if (!ifmgd->associated) 977 goto out; 978 979 if (!sdata->vif.csa_active) 980 goto out; 981 982 /* 983 * using reservation isn't immediate as it may be deferred until later 984 * with multi-vif. once reservation is complete it will re-schedule the 985 * work with no reserved_chanctx so verify chandef to check if it 986 * completed successfully 987 */ 988 989 if (sdata->reserved_chanctx) { 990 /* 991 * with multi-vif csa driver may call ieee80211_csa_finish() 992 * many times while waiting for other interfaces to use their 993 * reservations 994 */ 995 if (sdata->reserved_ready) 996 goto out; 997 998 ret = ieee80211_vif_use_reserved_context(sdata); 999 if (ret) { 1000 sdata_info(sdata, 1001 "failed to use reserved channel context, disconnecting (err=%d)\n", 1002 ret); 1003 ieee80211_queue_work(&sdata->local->hw, 1004 &ifmgd->csa_connection_drop_work); 1005 goto out; 1006 } 1007 1008 goto out; 1009 } 1010 1011 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1012 &sdata->csa_chandef)) { 1013 sdata_info(sdata, 1014 "failed to finalize channel switch, disconnecting\n"); 1015 ieee80211_queue_work(&sdata->local->hw, 1016 &ifmgd->csa_connection_drop_work); 1017 goto out; 1018 } 1019 1020 /* XXX: shouldn't really modify cfg80211-owned data! */ 1021 ifmgd->associated->channel = sdata->csa_chandef.chan; 1022 1023 ifmgd->csa_waiting_bcn = true; 1024 1025 ieee80211_sta_reset_beacon_monitor(sdata); 1026 ieee80211_sta_reset_conn_monitor(sdata); 1027 1028 out: 1029 mutex_unlock(&local->chanctx_mtx); 1030 mutex_unlock(&local->mtx); 1031 sdata_unlock(sdata); 1032 } 1033 1034 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1035 { 1036 struct ieee80211_local *local = sdata->local; 1037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1038 int ret; 1039 1040 sdata_assert_lock(sdata); 1041 1042 WARN_ON(!sdata->vif.csa_active); 1043 1044 if (sdata->csa_block_tx) { 1045 ieee80211_wake_vif_queues(local, sdata, 1046 IEEE80211_QUEUE_STOP_REASON_CSA); 1047 sdata->csa_block_tx = false; 1048 } 1049 1050 sdata->vif.csa_active = false; 1051 ifmgd->csa_waiting_bcn = false; 1052 1053 ret = drv_post_channel_switch(sdata); 1054 if (ret) { 1055 sdata_info(sdata, 1056 "driver post channel switch failed, disconnecting\n"); 1057 ieee80211_queue_work(&local->hw, 1058 &ifmgd->csa_connection_drop_work); 1059 return; 1060 } 1061 1062 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1063 } 1064 1065 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1066 { 1067 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1069 1070 trace_api_chswitch_done(sdata, success); 1071 if (!success) { 1072 sdata_info(sdata, 1073 "driver channel switch failed, disconnecting\n"); 1074 ieee80211_queue_work(&sdata->local->hw, 1075 &ifmgd->csa_connection_drop_work); 1076 } else { 1077 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1078 } 1079 } 1080 EXPORT_SYMBOL(ieee80211_chswitch_done); 1081 1082 static void ieee80211_chswitch_timer(unsigned long data) 1083 { 1084 struct ieee80211_sub_if_data *sdata = 1085 (struct ieee80211_sub_if_data *) data; 1086 1087 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1088 } 1089 1090 static void 1091 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1092 u64 timestamp, u32 device_timestamp, 1093 struct ieee802_11_elems *elems, 1094 bool beacon) 1095 { 1096 struct ieee80211_local *local = sdata->local; 1097 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1098 struct cfg80211_bss *cbss = ifmgd->associated; 1099 struct ieee80211_chanctx_conf *conf; 1100 struct ieee80211_chanctx *chanctx; 1101 enum nl80211_band current_band; 1102 struct ieee80211_csa_ie csa_ie; 1103 struct ieee80211_channel_switch ch_switch; 1104 int res; 1105 1106 sdata_assert_lock(sdata); 1107 1108 if (!cbss) 1109 return; 1110 1111 if (local->scanning) 1112 return; 1113 1114 /* disregard subsequent announcements if we are already processing */ 1115 if (sdata->vif.csa_active) 1116 return; 1117 1118 current_band = cbss->channel->band; 1119 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1120 ifmgd->flags, 1121 ifmgd->associated->bssid, &csa_ie); 1122 if (res < 0) 1123 ieee80211_queue_work(&local->hw, 1124 &ifmgd->csa_connection_drop_work); 1125 if (res) 1126 return; 1127 1128 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1129 IEEE80211_CHAN_DISABLED)) { 1130 sdata_info(sdata, 1131 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1132 ifmgd->associated->bssid, 1133 csa_ie.chandef.chan->center_freq, 1134 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1135 csa_ie.chandef.center_freq2); 1136 ieee80211_queue_work(&local->hw, 1137 &ifmgd->csa_connection_drop_work); 1138 return; 1139 } 1140 1141 if (cfg80211_chandef_identical(&csa_ie.chandef, 1142 &sdata->vif.bss_conf.chandef)) { 1143 if (ifmgd->csa_ignored_same_chan) 1144 return; 1145 sdata_info(sdata, 1146 "AP %pM tries to chanswitch to same channel, ignore\n", 1147 ifmgd->associated->bssid); 1148 ifmgd->csa_ignored_same_chan = true; 1149 return; 1150 } 1151 1152 /* 1153 * Drop all TDLS peers - either we disconnect or move to a different 1154 * channel from this point on. There's no telling what our peer will do. 1155 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1156 * have an incompatible wider chandef. 1157 */ 1158 ieee80211_teardown_tdls_peers(sdata); 1159 1160 mutex_lock(&local->mtx); 1161 mutex_lock(&local->chanctx_mtx); 1162 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1163 lockdep_is_held(&local->chanctx_mtx)); 1164 if (!conf) { 1165 sdata_info(sdata, 1166 "no channel context assigned to vif?, disconnecting\n"); 1167 goto drop_connection; 1168 } 1169 1170 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1171 1172 if (local->use_chanctx && 1173 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1174 sdata_info(sdata, 1175 "driver doesn't support chan-switch with channel contexts\n"); 1176 goto drop_connection; 1177 } 1178 1179 ch_switch.timestamp = timestamp; 1180 ch_switch.device_timestamp = device_timestamp; 1181 ch_switch.block_tx = csa_ie.mode; 1182 ch_switch.chandef = csa_ie.chandef; 1183 ch_switch.count = csa_ie.count; 1184 1185 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1186 sdata_info(sdata, 1187 "preparing for channel switch failed, disconnecting\n"); 1188 goto drop_connection; 1189 } 1190 1191 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1192 chanctx->mode, false); 1193 if (res) { 1194 sdata_info(sdata, 1195 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1196 res); 1197 goto drop_connection; 1198 } 1199 mutex_unlock(&local->chanctx_mtx); 1200 1201 sdata->vif.csa_active = true; 1202 sdata->csa_chandef = csa_ie.chandef; 1203 sdata->csa_block_tx = csa_ie.mode; 1204 ifmgd->csa_ignored_same_chan = false; 1205 1206 if (sdata->csa_block_tx) 1207 ieee80211_stop_vif_queues(local, sdata, 1208 IEEE80211_QUEUE_STOP_REASON_CSA); 1209 mutex_unlock(&local->mtx); 1210 1211 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1212 csa_ie.count); 1213 1214 if (local->ops->channel_switch) { 1215 /* use driver's channel switch callback */ 1216 drv_channel_switch(local, sdata, &ch_switch); 1217 return; 1218 } 1219 1220 /* channel switch handled in software */ 1221 if (csa_ie.count <= 1) 1222 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1223 else 1224 mod_timer(&ifmgd->chswitch_timer, 1225 TU_TO_EXP_TIME((csa_ie.count - 1) * 1226 cbss->beacon_interval)); 1227 return; 1228 drop_connection: 1229 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1230 mutex_unlock(&local->chanctx_mtx); 1231 mutex_unlock(&local->mtx); 1232 } 1233 1234 static bool 1235 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1236 struct ieee80211_channel *channel, 1237 const u8 *country_ie, u8 country_ie_len, 1238 const u8 *pwr_constr_elem, 1239 int *chan_pwr, int *pwr_reduction) 1240 { 1241 struct ieee80211_country_ie_triplet *triplet; 1242 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1243 int i, chan_increment; 1244 bool have_chan_pwr = false; 1245 1246 /* Invalid IE */ 1247 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1248 return false; 1249 1250 triplet = (void *)(country_ie + 3); 1251 country_ie_len -= 3; 1252 1253 switch (channel->band) { 1254 default: 1255 WARN_ON_ONCE(1); 1256 /* fall through */ 1257 case NL80211_BAND_2GHZ: 1258 case NL80211_BAND_60GHZ: 1259 chan_increment = 1; 1260 break; 1261 case NL80211_BAND_5GHZ: 1262 chan_increment = 4; 1263 break; 1264 } 1265 1266 /* find channel */ 1267 while (country_ie_len >= 3) { 1268 u8 first_channel = triplet->chans.first_channel; 1269 1270 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1271 goto next; 1272 1273 for (i = 0; i < triplet->chans.num_channels; i++) { 1274 if (first_channel + i * chan_increment == chan) { 1275 have_chan_pwr = true; 1276 *chan_pwr = triplet->chans.max_power; 1277 break; 1278 } 1279 } 1280 if (have_chan_pwr) 1281 break; 1282 1283 next: 1284 triplet++; 1285 country_ie_len -= 3; 1286 } 1287 1288 if (have_chan_pwr && pwr_constr_elem) 1289 *pwr_reduction = *pwr_constr_elem; 1290 else 1291 *pwr_reduction = 0; 1292 1293 return have_chan_pwr; 1294 } 1295 1296 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1297 struct ieee80211_channel *channel, 1298 const u8 *cisco_dtpc_ie, 1299 int *pwr_level) 1300 { 1301 /* From practical testing, the first data byte of the DTPC element 1302 * seems to contain the requested dBm level, and the CLI on Cisco 1303 * APs clearly state the range is -127 to 127 dBm, which indicates 1304 * a signed byte, although it seemingly never actually goes negative. 1305 * The other byte seems to always be zero. 1306 */ 1307 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1308 } 1309 1310 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1311 struct ieee80211_channel *channel, 1312 struct ieee80211_mgmt *mgmt, 1313 const u8 *country_ie, u8 country_ie_len, 1314 const u8 *pwr_constr_ie, 1315 const u8 *cisco_dtpc_ie) 1316 { 1317 bool has_80211h_pwr = false, has_cisco_pwr = false; 1318 int chan_pwr = 0, pwr_reduction_80211h = 0; 1319 int pwr_level_cisco, pwr_level_80211h; 1320 int new_ap_level; 1321 __le16 capab = mgmt->u.probe_resp.capab_info; 1322 1323 if (country_ie && 1324 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1325 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1326 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1327 sdata, channel, country_ie, country_ie_len, 1328 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1329 pwr_level_80211h = 1330 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1331 } 1332 1333 if (cisco_dtpc_ie) { 1334 ieee80211_find_cisco_dtpc( 1335 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1336 has_cisco_pwr = true; 1337 } 1338 1339 if (!has_80211h_pwr && !has_cisco_pwr) 1340 return 0; 1341 1342 /* If we have both 802.11h and Cisco DTPC, apply both limits 1343 * by picking the smallest of the two power levels advertised. 1344 */ 1345 if (has_80211h_pwr && 1346 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1347 new_ap_level = pwr_level_80211h; 1348 1349 if (sdata->ap_power_level == new_ap_level) 1350 return 0; 1351 1352 sdata_dbg(sdata, 1353 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1354 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1355 sdata->u.mgd.bssid); 1356 } else { /* has_cisco_pwr is always true here. */ 1357 new_ap_level = pwr_level_cisco; 1358 1359 if (sdata->ap_power_level == new_ap_level) 1360 return 0; 1361 1362 sdata_dbg(sdata, 1363 "Limiting TX power to %d dBm as advertised by %pM\n", 1364 pwr_level_cisco, sdata->u.mgd.bssid); 1365 } 1366 1367 sdata->ap_power_level = new_ap_level; 1368 if (__ieee80211_recalc_txpower(sdata)) 1369 return BSS_CHANGED_TXPOWER; 1370 return 0; 1371 } 1372 1373 /* powersave */ 1374 static void ieee80211_enable_ps(struct ieee80211_local *local, 1375 struct ieee80211_sub_if_data *sdata) 1376 { 1377 struct ieee80211_conf *conf = &local->hw.conf; 1378 1379 /* 1380 * If we are scanning right now then the parameters will 1381 * take effect when scan finishes. 1382 */ 1383 if (local->scanning) 1384 return; 1385 1386 if (conf->dynamic_ps_timeout > 0 && 1387 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1388 mod_timer(&local->dynamic_ps_timer, jiffies + 1389 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1390 } else { 1391 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1392 ieee80211_send_nullfunc(local, sdata, true); 1393 1394 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1395 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1396 return; 1397 1398 conf->flags |= IEEE80211_CONF_PS; 1399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1400 } 1401 } 1402 1403 static void ieee80211_change_ps(struct ieee80211_local *local) 1404 { 1405 struct ieee80211_conf *conf = &local->hw.conf; 1406 1407 if (local->ps_sdata) { 1408 ieee80211_enable_ps(local, local->ps_sdata); 1409 } else if (conf->flags & IEEE80211_CONF_PS) { 1410 conf->flags &= ~IEEE80211_CONF_PS; 1411 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1412 del_timer_sync(&local->dynamic_ps_timer); 1413 cancel_work_sync(&local->dynamic_ps_enable_work); 1414 } 1415 } 1416 1417 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1418 { 1419 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1420 struct sta_info *sta = NULL; 1421 bool authorized = false; 1422 1423 if (!mgd->powersave) 1424 return false; 1425 1426 if (mgd->broken_ap) 1427 return false; 1428 1429 if (!mgd->associated) 1430 return false; 1431 1432 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1433 return false; 1434 1435 if (!mgd->have_beacon) 1436 return false; 1437 1438 rcu_read_lock(); 1439 sta = sta_info_get(sdata, mgd->bssid); 1440 if (sta) 1441 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1442 rcu_read_unlock(); 1443 1444 return authorized; 1445 } 1446 1447 /* need to hold RTNL or interface lock */ 1448 void ieee80211_recalc_ps(struct ieee80211_local *local) 1449 { 1450 struct ieee80211_sub_if_data *sdata, *found = NULL; 1451 int count = 0; 1452 int timeout; 1453 1454 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1455 local->ps_sdata = NULL; 1456 return; 1457 } 1458 1459 list_for_each_entry(sdata, &local->interfaces, list) { 1460 if (!ieee80211_sdata_running(sdata)) 1461 continue; 1462 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1463 /* If an AP vif is found, then disable PS 1464 * by setting the count to zero thereby setting 1465 * ps_sdata to NULL. 1466 */ 1467 count = 0; 1468 break; 1469 } 1470 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1471 continue; 1472 found = sdata; 1473 count++; 1474 } 1475 1476 if (count == 1 && ieee80211_powersave_allowed(found)) { 1477 u8 dtimper = found->u.mgd.dtim_period; 1478 1479 timeout = local->dynamic_ps_forced_timeout; 1480 if (timeout < 0) 1481 timeout = 100; 1482 local->hw.conf.dynamic_ps_timeout = timeout; 1483 1484 /* If the TIM IE is invalid, pretend the value is 1 */ 1485 if (!dtimper) 1486 dtimper = 1; 1487 1488 local->hw.conf.ps_dtim_period = dtimper; 1489 local->ps_sdata = found; 1490 } else { 1491 local->ps_sdata = NULL; 1492 } 1493 1494 ieee80211_change_ps(local); 1495 } 1496 1497 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1498 { 1499 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1500 1501 if (sdata->vif.bss_conf.ps != ps_allowed) { 1502 sdata->vif.bss_conf.ps = ps_allowed; 1503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1504 } 1505 } 1506 1507 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1508 { 1509 struct ieee80211_local *local = 1510 container_of(work, struct ieee80211_local, 1511 dynamic_ps_disable_work); 1512 1513 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1514 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1515 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1516 } 1517 1518 ieee80211_wake_queues_by_reason(&local->hw, 1519 IEEE80211_MAX_QUEUE_MAP, 1520 IEEE80211_QUEUE_STOP_REASON_PS, 1521 false); 1522 } 1523 1524 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1525 { 1526 struct ieee80211_local *local = 1527 container_of(work, struct ieee80211_local, 1528 dynamic_ps_enable_work); 1529 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1530 struct ieee80211_if_managed *ifmgd; 1531 unsigned long flags; 1532 int q; 1533 1534 /* can only happen when PS was just disabled anyway */ 1535 if (!sdata) 1536 return; 1537 1538 ifmgd = &sdata->u.mgd; 1539 1540 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1541 return; 1542 1543 if (local->hw.conf.dynamic_ps_timeout > 0) { 1544 /* don't enter PS if TX frames are pending */ 1545 if (drv_tx_frames_pending(local)) { 1546 mod_timer(&local->dynamic_ps_timer, jiffies + 1547 msecs_to_jiffies( 1548 local->hw.conf.dynamic_ps_timeout)); 1549 return; 1550 } 1551 1552 /* 1553 * transmission can be stopped by others which leads to 1554 * dynamic_ps_timer expiry. Postpone the ps timer if it 1555 * is not the actual idle state. 1556 */ 1557 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1558 for (q = 0; q < local->hw.queues; q++) { 1559 if (local->queue_stop_reasons[q]) { 1560 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1561 flags); 1562 mod_timer(&local->dynamic_ps_timer, jiffies + 1563 msecs_to_jiffies( 1564 local->hw.conf.dynamic_ps_timeout)); 1565 return; 1566 } 1567 } 1568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1569 } 1570 1571 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1572 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1573 if (drv_tx_frames_pending(local)) { 1574 mod_timer(&local->dynamic_ps_timer, jiffies + 1575 msecs_to_jiffies( 1576 local->hw.conf.dynamic_ps_timeout)); 1577 } else { 1578 ieee80211_send_nullfunc(local, sdata, true); 1579 /* Flush to get the tx status of nullfunc frame */ 1580 ieee80211_flush_queues(local, sdata, false); 1581 } 1582 } 1583 1584 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1585 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1586 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1587 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1588 local->hw.conf.flags |= IEEE80211_CONF_PS; 1589 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1590 } 1591 } 1592 1593 void ieee80211_dynamic_ps_timer(unsigned long data) 1594 { 1595 struct ieee80211_local *local = (void *) data; 1596 1597 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1598 } 1599 1600 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1601 { 1602 struct delayed_work *delayed_work = to_delayed_work(work); 1603 struct ieee80211_sub_if_data *sdata = 1604 container_of(delayed_work, struct ieee80211_sub_if_data, 1605 dfs_cac_timer_work); 1606 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1607 1608 mutex_lock(&sdata->local->mtx); 1609 if (sdata->wdev.cac_started) { 1610 ieee80211_vif_release_channel(sdata); 1611 cfg80211_cac_event(sdata->dev, &chandef, 1612 NL80211_RADAR_CAC_FINISHED, 1613 GFP_KERNEL); 1614 } 1615 mutex_unlock(&sdata->local->mtx); 1616 } 1617 1618 static bool 1619 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1620 { 1621 struct ieee80211_local *local = sdata->local; 1622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1623 bool ret = false; 1624 int ac; 1625 1626 if (local->hw.queues < IEEE80211_NUM_ACS) 1627 return false; 1628 1629 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1630 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1631 int non_acm_ac; 1632 unsigned long now = jiffies; 1633 1634 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1635 tx_tspec->admitted_time && 1636 time_after(now, tx_tspec->time_slice_start + HZ)) { 1637 tx_tspec->consumed_tx_time = 0; 1638 tx_tspec->time_slice_start = now; 1639 1640 if (tx_tspec->downgraded) 1641 tx_tspec->action = 1642 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1643 } 1644 1645 switch (tx_tspec->action) { 1646 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1647 /* take the original parameters */ 1648 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1649 sdata_err(sdata, 1650 "failed to set TX queue parameters for queue %d\n", 1651 ac); 1652 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1653 tx_tspec->downgraded = false; 1654 ret = true; 1655 break; 1656 case TX_TSPEC_ACTION_DOWNGRADE: 1657 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1658 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1659 ret = true; 1660 break; 1661 } 1662 /* downgrade next lower non-ACM AC */ 1663 for (non_acm_ac = ac + 1; 1664 non_acm_ac < IEEE80211_NUM_ACS; 1665 non_acm_ac++) 1666 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1667 break; 1668 /* Usually the loop will result in using BK even if it 1669 * requires admission control, but such a configuration 1670 * makes no sense and we have to transmit somehow - the 1671 * AC selection does the same thing. 1672 * If we started out trying to downgrade from BK, then 1673 * the extra condition here might be needed. 1674 */ 1675 if (non_acm_ac >= IEEE80211_NUM_ACS) 1676 non_acm_ac = IEEE80211_AC_BK; 1677 if (drv_conf_tx(local, sdata, ac, 1678 &sdata->tx_conf[non_acm_ac])) 1679 sdata_err(sdata, 1680 "failed to set TX queue parameters for queue %d\n", 1681 ac); 1682 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1683 ret = true; 1684 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1685 tx_tspec->time_slice_start + HZ - now + 1); 1686 break; 1687 case TX_TSPEC_ACTION_NONE: 1688 /* nothing now */ 1689 break; 1690 } 1691 } 1692 1693 return ret; 1694 } 1695 1696 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1697 { 1698 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1699 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1700 } 1701 1702 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1703 { 1704 struct ieee80211_sub_if_data *sdata; 1705 1706 sdata = container_of(work, struct ieee80211_sub_if_data, 1707 u.mgd.tx_tspec_wk.work); 1708 ieee80211_sta_handle_tspec_ac_params(sdata); 1709 } 1710 1711 /* MLME */ 1712 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1713 struct ieee80211_sub_if_data *sdata, 1714 const u8 *wmm_param, size_t wmm_param_len) 1715 { 1716 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1717 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1718 size_t left; 1719 int count, ac; 1720 const u8 *pos; 1721 u8 uapsd_queues = 0; 1722 1723 if (!local->ops->conf_tx) 1724 return false; 1725 1726 if (local->hw.queues < IEEE80211_NUM_ACS) 1727 return false; 1728 1729 if (!wmm_param) 1730 return false; 1731 1732 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1733 return false; 1734 1735 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1736 uapsd_queues = ifmgd->uapsd_queues; 1737 1738 count = wmm_param[6] & 0x0f; 1739 if (count == ifmgd->wmm_last_param_set) 1740 return false; 1741 ifmgd->wmm_last_param_set = count; 1742 1743 pos = wmm_param + 8; 1744 left = wmm_param_len - 8; 1745 1746 memset(¶ms, 0, sizeof(params)); 1747 1748 sdata->wmm_acm = 0; 1749 for (; left >= 4; left -= 4, pos += 4) { 1750 int aci = (pos[0] >> 5) & 0x03; 1751 int acm = (pos[0] >> 4) & 0x01; 1752 bool uapsd = false; 1753 1754 switch (aci) { 1755 case 1: /* AC_BK */ 1756 ac = IEEE80211_AC_BK; 1757 if (acm) 1758 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1759 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1760 uapsd = true; 1761 break; 1762 case 2: /* AC_VI */ 1763 ac = IEEE80211_AC_VI; 1764 if (acm) 1765 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1766 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1767 uapsd = true; 1768 break; 1769 case 3: /* AC_VO */ 1770 ac = IEEE80211_AC_VO; 1771 if (acm) 1772 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1774 uapsd = true; 1775 break; 1776 case 0: /* AC_BE */ 1777 default: 1778 ac = IEEE80211_AC_BE; 1779 if (acm) 1780 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1781 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1782 uapsd = true; 1783 break; 1784 } 1785 1786 params[ac].aifs = pos[0] & 0x0f; 1787 1788 if (params[ac].aifs < 2) { 1789 sdata_info(sdata, 1790 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1791 params[ac].aifs, aci); 1792 params[ac].aifs = 2; 1793 } 1794 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1795 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1796 params[ac].txop = get_unaligned_le16(pos + 2); 1797 params[ac].acm = acm; 1798 params[ac].uapsd = uapsd; 1799 1800 if (params[ac].cw_min > params[ac].cw_max) { 1801 sdata_info(sdata, 1802 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1803 params[ac].cw_min, params[ac].cw_max, aci); 1804 return false; 1805 } 1806 } 1807 1808 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1809 mlme_dbg(sdata, 1810 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1811 ac, params[ac].acm, 1812 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1813 params[ac].txop, params[ac].uapsd, 1814 ifmgd->tx_tspec[ac].downgraded); 1815 sdata->tx_conf[ac] = params[ac]; 1816 if (!ifmgd->tx_tspec[ac].downgraded && 1817 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1818 sdata_err(sdata, 1819 "failed to set TX queue parameters for AC %d\n", 1820 ac); 1821 } 1822 1823 /* enable WMM or activate new settings */ 1824 sdata->vif.bss_conf.qos = true; 1825 return true; 1826 } 1827 1828 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1829 { 1830 lockdep_assert_held(&sdata->local->mtx); 1831 1832 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1833 ieee80211_run_deferred_scan(sdata->local); 1834 } 1835 1836 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1837 { 1838 mutex_lock(&sdata->local->mtx); 1839 __ieee80211_stop_poll(sdata); 1840 mutex_unlock(&sdata->local->mtx); 1841 } 1842 1843 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1844 u16 capab, bool erp_valid, u8 erp) 1845 { 1846 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1847 struct ieee80211_supported_band *sband; 1848 u32 changed = 0; 1849 bool use_protection; 1850 bool use_short_preamble; 1851 bool use_short_slot; 1852 1853 sband = ieee80211_get_sband(sdata); 1854 if (!sband) 1855 return changed; 1856 1857 if (erp_valid) { 1858 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1859 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1860 } else { 1861 use_protection = false; 1862 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1863 } 1864 1865 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1866 if (sband->band == NL80211_BAND_5GHZ) 1867 use_short_slot = true; 1868 1869 if (use_protection != bss_conf->use_cts_prot) { 1870 bss_conf->use_cts_prot = use_protection; 1871 changed |= BSS_CHANGED_ERP_CTS_PROT; 1872 } 1873 1874 if (use_short_preamble != bss_conf->use_short_preamble) { 1875 bss_conf->use_short_preamble = use_short_preamble; 1876 changed |= BSS_CHANGED_ERP_PREAMBLE; 1877 } 1878 1879 if (use_short_slot != bss_conf->use_short_slot) { 1880 bss_conf->use_short_slot = use_short_slot; 1881 changed |= BSS_CHANGED_ERP_SLOT; 1882 } 1883 1884 return changed; 1885 } 1886 1887 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1888 struct cfg80211_bss *cbss, 1889 u32 bss_info_changed) 1890 { 1891 struct ieee80211_bss *bss = (void *)cbss->priv; 1892 struct ieee80211_local *local = sdata->local; 1893 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1894 1895 bss_info_changed |= BSS_CHANGED_ASSOC; 1896 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1897 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1898 1899 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1900 beacon_loss_count * bss_conf->beacon_int)); 1901 1902 sdata->u.mgd.associated = cbss; 1903 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1904 1905 ieee80211_check_rate_mask(sdata); 1906 1907 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1908 1909 if (sdata->vif.p2p || 1910 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1911 const struct cfg80211_bss_ies *ies; 1912 1913 rcu_read_lock(); 1914 ies = rcu_dereference(cbss->ies); 1915 if (ies) { 1916 int ret; 1917 1918 ret = cfg80211_get_p2p_attr( 1919 ies->data, ies->len, 1920 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1921 (u8 *) &bss_conf->p2p_noa_attr, 1922 sizeof(bss_conf->p2p_noa_attr)); 1923 if (ret >= 2) { 1924 sdata->u.mgd.p2p_noa_index = 1925 bss_conf->p2p_noa_attr.index; 1926 bss_info_changed |= BSS_CHANGED_P2P_PS; 1927 } 1928 } 1929 rcu_read_unlock(); 1930 } 1931 1932 /* just to be sure */ 1933 ieee80211_stop_poll(sdata); 1934 1935 ieee80211_led_assoc(local, 1); 1936 1937 if (sdata->u.mgd.have_beacon) { 1938 /* 1939 * If the AP is buggy we may get here with no DTIM period 1940 * known, so assume it's 1 which is the only safe assumption 1941 * in that case, although if the TIM IE is broken powersave 1942 * probably just won't work at all. 1943 */ 1944 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1945 bss_conf->beacon_rate = bss->beacon_rate; 1946 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1947 } else { 1948 bss_conf->beacon_rate = NULL; 1949 bss_conf->dtim_period = 0; 1950 } 1951 1952 bss_conf->assoc = 1; 1953 1954 /* Tell the driver to monitor connection quality (if supported) */ 1955 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1956 bss_conf->cqm_rssi_thold) 1957 bss_info_changed |= BSS_CHANGED_CQM; 1958 1959 /* Enable ARP filtering */ 1960 if (bss_conf->arp_addr_cnt) 1961 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1962 1963 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1964 1965 mutex_lock(&local->iflist_mtx); 1966 ieee80211_recalc_ps(local); 1967 mutex_unlock(&local->iflist_mtx); 1968 1969 ieee80211_recalc_smps(sdata); 1970 ieee80211_recalc_ps_vif(sdata); 1971 1972 netif_carrier_on(sdata->dev); 1973 } 1974 1975 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1976 u16 stype, u16 reason, bool tx, 1977 u8 *frame_buf) 1978 { 1979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1980 struct ieee80211_local *local = sdata->local; 1981 u32 changed = 0; 1982 1983 sdata_assert_lock(sdata); 1984 1985 if (WARN_ON_ONCE(tx && !frame_buf)) 1986 return; 1987 1988 if (WARN_ON(!ifmgd->associated)) 1989 return; 1990 1991 ieee80211_stop_poll(sdata); 1992 1993 ifmgd->associated = NULL; 1994 netif_carrier_off(sdata->dev); 1995 1996 /* 1997 * if we want to get out of ps before disassoc (why?) we have 1998 * to do it before sending disassoc, as otherwise the null-packet 1999 * won't be valid. 2000 */ 2001 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2002 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2003 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2004 } 2005 local->ps_sdata = NULL; 2006 2007 /* disable per-vif ps */ 2008 ieee80211_recalc_ps_vif(sdata); 2009 2010 /* make sure ongoing transmission finishes */ 2011 synchronize_net(); 2012 2013 /* 2014 * drop any frame before deauth/disassoc, this can be data or 2015 * management frame. Since we are disconnecting, we should not 2016 * insist sending these frames which can take time and delay 2017 * the disconnection and possible the roaming. 2018 */ 2019 if (tx) 2020 ieee80211_flush_queues(local, sdata, true); 2021 2022 /* deauthenticate/disassociate now */ 2023 if (tx || frame_buf) 2024 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2025 reason, tx, frame_buf); 2026 2027 /* flush out frame - make sure the deauth was actually sent */ 2028 if (tx) 2029 ieee80211_flush_queues(local, sdata, false); 2030 2031 /* clear bssid only after building the needed mgmt frames */ 2032 eth_zero_addr(ifmgd->bssid); 2033 2034 /* remove AP and TDLS peers */ 2035 sta_info_flush(sdata); 2036 2037 /* finally reset all BSS / config parameters */ 2038 changed |= ieee80211_reset_erp_info(sdata); 2039 2040 ieee80211_led_assoc(local, 0); 2041 changed |= BSS_CHANGED_ASSOC; 2042 sdata->vif.bss_conf.assoc = false; 2043 2044 ifmgd->p2p_noa_index = -1; 2045 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2046 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2047 2048 /* on the next assoc, re-program HT/VHT parameters */ 2049 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2050 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2051 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2052 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2053 2054 /* reset MU-MIMO ownership and group data */ 2055 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2056 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2057 memset(sdata->vif.bss_conf.mu_group.position, 0, 2058 sizeof(sdata->vif.bss_conf.mu_group.position)); 2059 changed |= BSS_CHANGED_MU_GROUPS; 2060 sdata->vif.mu_mimo_owner = false; 2061 2062 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2063 2064 del_timer_sync(&local->dynamic_ps_timer); 2065 cancel_work_sync(&local->dynamic_ps_enable_work); 2066 2067 /* Disable ARP filtering */ 2068 if (sdata->vif.bss_conf.arp_addr_cnt) 2069 changed |= BSS_CHANGED_ARP_FILTER; 2070 2071 sdata->vif.bss_conf.qos = false; 2072 changed |= BSS_CHANGED_QOS; 2073 2074 /* The BSSID (not really interesting) and HT changed */ 2075 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2076 ieee80211_bss_info_change_notify(sdata, changed); 2077 2078 /* disassociated - set to defaults now */ 2079 ieee80211_set_wmm_default(sdata, false, false); 2080 2081 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2082 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2083 del_timer_sync(&sdata->u.mgd.timer); 2084 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2085 2086 sdata->vif.bss_conf.dtim_period = 0; 2087 sdata->vif.bss_conf.beacon_rate = NULL; 2088 2089 ifmgd->have_beacon = false; 2090 2091 ifmgd->flags = 0; 2092 mutex_lock(&local->mtx); 2093 ieee80211_vif_release_channel(sdata); 2094 2095 sdata->vif.csa_active = false; 2096 ifmgd->csa_waiting_bcn = false; 2097 ifmgd->csa_ignored_same_chan = false; 2098 if (sdata->csa_block_tx) { 2099 ieee80211_wake_vif_queues(local, sdata, 2100 IEEE80211_QUEUE_STOP_REASON_CSA); 2101 sdata->csa_block_tx = false; 2102 } 2103 mutex_unlock(&local->mtx); 2104 2105 /* existing TX TSPEC sessions no longer exist */ 2106 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2107 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2108 2109 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2110 } 2111 2112 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2113 struct ieee80211_hdr *hdr) 2114 { 2115 /* 2116 * We can postpone the mgd.timer whenever receiving unicast frames 2117 * from AP because we know that the connection is working both ways 2118 * at that time. But multicast frames (and hence also beacons) must 2119 * be ignored here, because we need to trigger the timer during 2120 * data idle periods for sending the periodic probe request to the 2121 * AP we're connected to. 2122 */ 2123 if (is_multicast_ether_addr(hdr->addr1)) 2124 return; 2125 2126 ieee80211_sta_reset_conn_monitor(sdata); 2127 } 2128 2129 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2130 { 2131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2132 struct ieee80211_local *local = sdata->local; 2133 2134 mutex_lock(&local->mtx); 2135 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2136 goto out; 2137 2138 __ieee80211_stop_poll(sdata); 2139 2140 mutex_lock(&local->iflist_mtx); 2141 ieee80211_recalc_ps(local); 2142 mutex_unlock(&local->iflist_mtx); 2143 2144 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2145 goto out; 2146 2147 /* 2148 * We've received a probe response, but are not sure whether 2149 * we have or will be receiving any beacons or data, so let's 2150 * schedule the timers again, just in case. 2151 */ 2152 ieee80211_sta_reset_beacon_monitor(sdata); 2153 2154 mod_timer(&ifmgd->conn_mon_timer, 2155 round_jiffies_up(jiffies + 2156 IEEE80211_CONNECTION_IDLE_TIME)); 2157 out: 2158 mutex_unlock(&local->mtx); 2159 } 2160 2161 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2162 struct ieee80211_hdr *hdr, 2163 u16 tx_time) 2164 { 2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2166 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2167 int ac = ieee80211_ac_from_tid(tid); 2168 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2169 unsigned long now = jiffies; 2170 2171 if (likely(!tx_tspec->admitted_time)) 2172 return; 2173 2174 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2175 tx_tspec->consumed_tx_time = 0; 2176 tx_tspec->time_slice_start = now; 2177 2178 if (tx_tspec->downgraded) { 2179 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2180 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2181 } 2182 } 2183 2184 if (tx_tspec->downgraded) 2185 return; 2186 2187 tx_tspec->consumed_tx_time += tx_time; 2188 2189 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2190 tx_tspec->downgraded = true; 2191 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2192 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2193 } 2194 } 2195 2196 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2197 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2198 { 2199 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2200 2201 if (!ieee80211_is_data(hdr->frame_control)) 2202 return; 2203 2204 if (ieee80211_is_nullfunc(hdr->frame_control) && 2205 sdata->u.mgd.probe_send_count > 0) { 2206 if (ack) 2207 ieee80211_sta_reset_conn_monitor(sdata); 2208 else 2209 sdata->u.mgd.nullfunc_failed = true; 2210 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2211 return; 2212 } 2213 2214 if (ack) 2215 ieee80211_sta_reset_conn_monitor(sdata); 2216 } 2217 2218 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2219 { 2220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2221 const u8 *ssid; 2222 u8 *dst = ifmgd->associated->bssid; 2223 u8 unicast_limit = max(1, max_probe_tries - 3); 2224 struct sta_info *sta; 2225 2226 /* 2227 * Try sending broadcast probe requests for the last three 2228 * probe requests after the first ones failed since some 2229 * buggy APs only support broadcast probe requests. 2230 */ 2231 if (ifmgd->probe_send_count >= unicast_limit) 2232 dst = NULL; 2233 2234 /* 2235 * When the hardware reports an accurate Tx ACK status, it's 2236 * better to send a nullfunc frame instead of a probe request, 2237 * as it will kick us off the AP quickly if we aren't associated 2238 * anymore. The timeout will be reset if the frame is ACKed by 2239 * the AP. 2240 */ 2241 ifmgd->probe_send_count++; 2242 2243 if (dst) { 2244 mutex_lock(&sdata->local->sta_mtx); 2245 sta = sta_info_get(sdata, dst); 2246 if (!WARN_ON(!sta)) 2247 ieee80211_check_fast_rx(sta); 2248 mutex_unlock(&sdata->local->sta_mtx); 2249 } 2250 2251 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2252 ifmgd->nullfunc_failed = false; 2253 ieee80211_send_nullfunc(sdata->local, sdata, false); 2254 } else { 2255 int ssid_len; 2256 2257 rcu_read_lock(); 2258 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2259 if (WARN_ON_ONCE(ssid == NULL)) 2260 ssid_len = 0; 2261 else 2262 ssid_len = ssid[1]; 2263 2264 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2265 ssid + 2, ssid_len, NULL, 2266 0, (u32) -1, true, 0, 2267 ifmgd->associated->channel, false); 2268 rcu_read_unlock(); 2269 } 2270 2271 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2272 run_again(sdata, ifmgd->probe_timeout); 2273 } 2274 2275 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2276 bool beacon) 2277 { 2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2279 bool already = false; 2280 2281 if (!ieee80211_sdata_running(sdata)) 2282 return; 2283 2284 sdata_lock(sdata); 2285 2286 if (!ifmgd->associated) 2287 goto out; 2288 2289 mutex_lock(&sdata->local->mtx); 2290 2291 if (sdata->local->tmp_channel || sdata->local->scanning) { 2292 mutex_unlock(&sdata->local->mtx); 2293 goto out; 2294 } 2295 2296 if (beacon) { 2297 mlme_dbg_ratelimited(sdata, 2298 "detected beacon loss from AP (missed %d beacons) - probing\n", 2299 beacon_loss_count); 2300 2301 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2302 } 2303 2304 /* 2305 * The driver/our work has already reported this event or the 2306 * connection monitoring has kicked in and we have already sent 2307 * a probe request. Or maybe the AP died and the driver keeps 2308 * reporting until we disassociate... 2309 * 2310 * In either case we have to ignore the current call to this 2311 * function (except for setting the correct probe reason bit) 2312 * because otherwise we would reset the timer every time and 2313 * never check whether we received a probe response! 2314 */ 2315 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2316 already = true; 2317 2318 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2319 2320 mutex_unlock(&sdata->local->mtx); 2321 2322 if (already) 2323 goto out; 2324 2325 mutex_lock(&sdata->local->iflist_mtx); 2326 ieee80211_recalc_ps(sdata->local); 2327 mutex_unlock(&sdata->local->iflist_mtx); 2328 2329 ifmgd->probe_send_count = 0; 2330 ieee80211_mgd_probe_ap_send(sdata); 2331 out: 2332 sdata_unlock(sdata); 2333 } 2334 2335 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2336 struct ieee80211_vif *vif) 2337 { 2338 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2340 struct cfg80211_bss *cbss; 2341 struct sk_buff *skb; 2342 const u8 *ssid; 2343 int ssid_len; 2344 2345 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2346 return NULL; 2347 2348 sdata_assert_lock(sdata); 2349 2350 if (ifmgd->associated) 2351 cbss = ifmgd->associated; 2352 else if (ifmgd->auth_data) 2353 cbss = ifmgd->auth_data->bss; 2354 else if (ifmgd->assoc_data) 2355 cbss = ifmgd->assoc_data->bss; 2356 else 2357 return NULL; 2358 2359 rcu_read_lock(); 2360 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2361 if (WARN_ON_ONCE(ssid == NULL)) 2362 ssid_len = 0; 2363 else 2364 ssid_len = ssid[1]; 2365 2366 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2367 (u32) -1, cbss->channel, 2368 ssid + 2, ssid_len, 2369 NULL, 0, true); 2370 rcu_read_unlock(); 2371 2372 return skb; 2373 } 2374 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2375 2376 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2377 const u8 *buf, size_t len, bool tx, 2378 u16 reason) 2379 { 2380 struct ieee80211_event event = { 2381 .type = MLME_EVENT, 2382 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2383 .u.mlme.reason = reason, 2384 }; 2385 2386 if (tx) 2387 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2388 else 2389 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2390 2391 drv_event_callback(sdata->local, sdata, &event); 2392 } 2393 2394 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2395 { 2396 struct ieee80211_local *local = sdata->local; 2397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2398 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2399 2400 sdata_lock(sdata); 2401 if (!ifmgd->associated) { 2402 sdata_unlock(sdata); 2403 return; 2404 } 2405 2406 /* AP is probably out of range (or not reachable for another reason) so 2407 * remove the bss struct for that AP. 2408 */ 2409 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2410 2411 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2413 true, frame_buf); 2414 mutex_lock(&local->mtx); 2415 sdata->vif.csa_active = false; 2416 ifmgd->csa_waiting_bcn = false; 2417 if (sdata->csa_block_tx) { 2418 ieee80211_wake_vif_queues(local, sdata, 2419 IEEE80211_QUEUE_STOP_REASON_CSA); 2420 sdata->csa_block_tx = false; 2421 } 2422 mutex_unlock(&local->mtx); 2423 2424 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2425 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2426 2427 sdata_unlock(sdata); 2428 } 2429 2430 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2431 { 2432 struct ieee80211_sub_if_data *sdata = 2433 container_of(work, struct ieee80211_sub_if_data, 2434 u.mgd.beacon_connection_loss_work); 2435 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2436 2437 if (ifmgd->associated) 2438 ifmgd->beacon_loss_count++; 2439 2440 if (ifmgd->connection_loss) { 2441 sdata_info(sdata, "Connection to AP %pM lost\n", 2442 ifmgd->bssid); 2443 __ieee80211_disconnect(sdata); 2444 } else { 2445 ieee80211_mgd_probe_ap(sdata, true); 2446 } 2447 } 2448 2449 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2450 { 2451 struct ieee80211_sub_if_data *sdata = 2452 container_of(work, struct ieee80211_sub_if_data, 2453 u.mgd.csa_connection_drop_work); 2454 2455 __ieee80211_disconnect(sdata); 2456 } 2457 2458 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2459 { 2460 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2461 struct ieee80211_hw *hw = &sdata->local->hw; 2462 2463 trace_api_beacon_loss(sdata); 2464 2465 sdata->u.mgd.connection_loss = false; 2466 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2467 } 2468 EXPORT_SYMBOL(ieee80211_beacon_loss); 2469 2470 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2471 { 2472 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2473 struct ieee80211_hw *hw = &sdata->local->hw; 2474 2475 trace_api_connection_loss(sdata); 2476 2477 sdata->u.mgd.connection_loss = true; 2478 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2479 } 2480 EXPORT_SYMBOL(ieee80211_connection_loss); 2481 2482 2483 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2484 bool assoc) 2485 { 2486 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2487 2488 sdata_assert_lock(sdata); 2489 2490 if (!assoc) { 2491 /* 2492 * we are not authenticated yet, the only timer that could be 2493 * running is the timeout for the authentication response which 2494 * which is not relevant anymore. 2495 */ 2496 del_timer_sync(&sdata->u.mgd.timer); 2497 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2498 2499 eth_zero_addr(sdata->u.mgd.bssid); 2500 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2501 sdata->u.mgd.flags = 0; 2502 mutex_lock(&sdata->local->mtx); 2503 ieee80211_vif_release_channel(sdata); 2504 mutex_unlock(&sdata->local->mtx); 2505 } 2506 2507 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2508 kfree(auth_data); 2509 sdata->u.mgd.auth_data = NULL; 2510 } 2511 2512 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2513 bool assoc, bool abandon) 2514 { 2515 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2516 2517 sdata_assert_lock(sdata); 2518 2519 if (!assoc) { 2520 /* 2521 * we are not associated yet, the only timer that could be 2522 * running is the timeout for the association response which 2523 * which is not relevant anymore. 2524 */ 2525 del_timer_sync(&sdata->u.mgd.timer); 2526 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2527 2528 eth_zero_addr(sdata->u.mgd.bssid); 2529 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2530 sdata->u.mgd.flags = 0; 2531 sdata->vif.mu_mimo_owner = false; 2532 2533 mutex_lock(&sdata->local->mtx); 2534 ieee80211_vif_release_channel(sdata); 2535 mutex_unlock(&sdata->local->mtx); 2536 2537 if (abandon) 2538 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2539 } 2540 2541 kfree(assoc_data); 2542 sdata->u.mgd.assoc_data = NULL; 2543 } 2544 2545 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2546 struct ieee80211_mgmt *mgmt, size_t len) 2547 { 2548 struct ieee80211_local *local = sdata->local; 2549 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2550 u8 *pos; 2551 struct ieee802_11_elems elems; 2552 u32 tx_flags = 0; 2553 2554 pos = mgmt->u.auth.variable; 2555 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2556 if (!elems.challenge) 2557 return; 2558 auth_data->expected_transaction = 4; 2559 drv_mgd_prepare_tx(sdata->local, sdata); 2560 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2561 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2562 IEEE80211_TX_INTFL_MLME_CONN_TX; 2563 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2564 elems.challenge - 2, elems.challenge_len + 2, 2565 auth_data->bss->bssid, auth_data->bss->bssid, 2566 auth_data->key, auth_data->key_len, 2567 auth_data->key_idx, tx_flags); 2568 } 2569 2570 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2571 struct ieee80211_mgmt *mgmt, size_t len) 2572 { 2573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2574 u8 bssid[ETH_ALEN]; 2575 u16 auth_alg, auth_transaction, status_code; 2576 struct sta_info *sta; 2577 struct ieee80211_event event = { 2578 .type = MLME_EVENT, 2579 .u.mlme.data = AUTH_EVENT, 2580 }; 2581 2582 sdata_assert_lock(sdata); 2583 2584 if (len < 24 + 6) 2585 return; 2586 2587 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2588 return; 2589 2590 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2591 2592 if (!ether_addr_equal(bssid, mgmt->bssid)) 2593 return; 2594 2595 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2596 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2597 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2598 2599 if (auth_alg != ifmgd->auth_data->algorithm || 2600 auth_transaction != ifmgd->auth_data->expected_transaction) { 2601 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2602 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2603 auth_transaction, 2604 ifmgd->auth_data->expected_transaction); 2605 return; 2606 } 2607 2608 if (status_code != WLAN_STATUS_SUCCESS) { 2609 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2610 mgmt->sa, status_code); 2611 ieee80211_destroy_auth_data(sdata, false); 2612 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2613 event.u.mlme.status = MLME_DENIED; 2614 event.u.mlme.reason = status_code; 2615 drv_event_callback(sdata->local, sdata, &event); 2616 return; 2617 } 2618 2619 switch (ifmgd->auth_data->algorithm) { 2620 case WLAN_AUTH_OPEN: 2621 case WLAN_AUTH_LEAP: 2622 case WLAN_AUTH_FT: 2623 case WLAN_AUTH_SAE: 2624 case WLAN_AUTH_FILS_SK: 2625 case WLAN_AUTH_FILS_SK_PFS: 2626 case WLAN_AUTH_FILS_PK: 2627 break; 2628 case WLAN_AUTH_SHARED_KEY: 2629 if (ifmgd->auth_data->expected_transaction != 4) { 2630 ieee80211_auth_challenge(sdata, mgmt, len); 2631 /* need another frame */ 2632 return; 2633 } 2634 break; 2635 default: 2636 WARN_ONCE(1, "invalid auth alg %d", 2637 ifmgd->auth_data->algorithm); 2638 return; 2639 } 2640 2641 event.u.mlme.status = MLME_SUCCESS; 2642 drv_event_callback(sdata->local, sdata, &event); 2643 sdata_info(sdata, "authenticated\n"); 2644 ifmgd->auth_data->done = true; 2645 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2646 ifmgd->auth_data->timeout_started = true; 2647 run_again(sdata, ifmgd->auth_data->timeout); 2648 2649 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2650 ifmgd->auth_data->expected_transaction != 2) { 2651 /* 2652 * Report auth frame to user space for processing since another 2653 * round of Authentication frames is still needed. 2654 */ 2655 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2656 return; 2657 } 2658 2659 /* move station state to auth */ 2660 mutex_lock(&sdata->local->sta_mtx); 2661 sta = sta_info_get(sdata, bssid); 2662 if (!sta) { 2663 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2664 goto out_err; 2665 } 2666 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2667 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2668 goto out_err; 2669 } 2670 mutex_unlock(&sdata->local->sta_mtx); 2671 2672 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2673 return; 2674 out_err: 2675 mutex_unlock(&sdata->local->sta_mtx); 2676 /* ignore frame -- wait for timeout */ 2677 } 2678 2679 #define case_WLAN(type) \ 2680 case WLAN_REASON_##type: return #type 2681 2682 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2683 { 2684 switch (reason_code) { 2685 case_WLAN(UNSPECIFIED); 2686 case_WLAN(PREV_AUTH_NOT_VALID); 2687 case_WLAN(DEAUTH_LEAVING); 2688 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2689 case_WLAN(DISASSOC_AP_BUSY); 2690 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2691 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2692 case_WLAN(DISASSOC_STA_HAS_LEFT); 2693 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2694 case_WLAN(DISASSOC_BAD_POWER); 2695 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2696 case_WLAN(INVALID_IE); 2697 case_WLAN(MIC_FAILURE); 2698 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2699 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2700 case_WLAN(IE_DIFFERENT); 2701 case_WLAN(INVALID_GROUP_CIPHER); 2702 case_WLAN(INVALID_PAIRWISE_CIPHER); 2703 case_WLAN(INVALID_AKMP); 2704 case_WLAN(UNSUPP_RSN_VERSION); 2705 case_WLAN(INVALID_RSN_IE_CAP); 2706 case_WLAN(IEEE8021X_FAILED); 2707 case_WLAN(CIPHER_SUITE_REJECTED); 2708 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2709 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2710 case_WLAN(DISASSOC_LOW_ACK); 2711 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2712 case_WLAN(QSTA_LEAVE_QBSS); 2713 case_WLAN(QSTA_NOT_USE); 2714 case_WLAN(QSTA_REQUIRE_SETUP); 2715 case_WLAN(QSTA_TIMEOUT); 2716 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2717 case_WLAN(MESH_PEER_CANCELED); 2718 case_WLAN(MESH_MAX_PEERS); 2719 case_WLAN(MESH_CONFIG); 2720 case_WLAN(MESH_CLOSE); 2721 case_WLAN(MESH_MAX_RETRIES); 2722 case_WLAN(MESH_CONFIRM_TIMEOUT); 2723 case_WLAN(MESH_INVALID_GTK); 2724 case_WLAN(MESH_INCONSISTENT_PARAM); 2725 case_WLAN(MESH_INVALID_SECURITY); 2726 case_WLAN(MESH_PATH_ERROR); 2727 case_WLAN(MESH_PATH_NOFORWARD); 2728 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2729 case_WLAN(MAC_EXISTS_IN_MBSS); 2730 case_WLAN(MESH_CHAN_REGULATORY); 2731 case_WLAN(MESH_CHAN); 2732 default: return "<unknown>"; 2733 } 2734 } 2735 2736 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2737 struct ieee80211_mgmt *mgmt, size_t len) 2738 { 2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2740 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2741 2742 sdata_assert_lock(sdata); 2743 2744 if (len < 24 + 2) 2745 return; 2746 2747 if (ifmgd->associated && 2748 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2749 const u8 *bssid = ifmgd->associated->bssid; 2750 2751 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2752 bssid, reason_code, 2753 ieee80211_get_reason_code_string(reason_code)); 2754 2755 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2756 2757 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2758 reason_code); 2759 return; 2760 } 2761 2762 if (ifmgd->assoc_data && 2763 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2764 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2765 2766 sdata_info(sdata, 2767 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2768 bssid, reason_code, 2769 ieee80211_get_reason_code_string(reason_code)); 2770 2771 ieee80211_destroy_assoc_data(sdata, false, true); 2772 2773 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2774 return; 2775 } 2776 } 2777 2778 2779 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2780 struct ieee80211_mgmt *mgmt, size_t len) 2781 { 2782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2783 u16 reason_code; 2784 2785 sdata_assert_lock(sdata); 2786 2787 if (len < 24 + 2) 2788 return; 2789 2790 if (!ifmgd->associated || 2791 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2792 return; 2793 2794 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2795 2796 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2797 mgmt->sa, reason_code, 2798 ieee80211_get_reason_code_string(reason_code)); 2799 2800 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2801 2802 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2803 } 2804 2805 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2806 u8 *supp_rates, unsigned int supp_rates_len, 2807 u32 *rates, u32 *basic_rates, 2808 bool *have_higher_than_11mbit, 2809 int *min_rate, int *min_rate_index, 2810 int shift) 2811 { 2812 int i, j; 2813 2814 for (i = 0; i < supp_rates_len; i++) { 2815 int rate = supp_rates[i] & 0x7f; 2816 bool is_basic = !!(supp_rates[i] & 0x80); 2817 2818 if ((rate * 5 * (1 << shift)) > 110) 2819 *have_higher_than_11mbit = true; 2820 2821 /* 2822 * Skip HT and VHT BSS membership selectors since they're not 2823 * rates. 2824 * 2825 * Note: Even though the membership selector and the basic 2826 * rate flag share the same bit, they are not exactly 2827 * the same. 2828 */ 2829 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2830 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2831 continue; 2832 2833 for (j = 0; j < sband->n_bitrates; j++) { 2834 struct ieee80211_rate *br; 2835 int brate; 2836 2837 br = &sband->bitrates[j]; 2838 2839 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2840 if (brate == rate) { 2841 *rates |= BIT(j); 2842 if (is_basic) 2843 *basic_rates |= BIT(j); 2844 if ((rate * 5) < *min_rate) { 2845 *min_rate = rate * 5; 2846 *min_rate_index = j; 2847 } 2848 break; 2849 } 2850 } 2851 } 2852 } 2853 2854 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2855 struct cfg80211_bss *cbss, 2856 struct ieee80211_mgmt *mgmt, size_t len) 2857 { 2858 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2859 struct ieee80211_local *local = sdata->local; 2860 struct ieee80211_supported_band *sband; 2861 struct sta_info *sta; 2862 u8 *pos; 2863 u16 capab_info, aid; 2864 struct ieee802_11_elems elems; 2865 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2866 const struct cfg80211_bss_ies *bss_ies = NULL; 2867 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2868 u32 changed = 0; 2869 int err; 2870 bool ret; 2871 2872 /* AssocResp and ReassocResp have identical structure */ 2873 2874 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2875 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2876 2877 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2878 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2879 aid); 2880 aid &= ~(BIT(15) | BIT(14)); 2881 2882 ifmgd->broken_ap = false; 2883 2884 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2885 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2886 aid); 2887 aid = 0; 2888 ifmgd->broken_ap = true; 2889 } 2890 2891 pos = mgmt->u.assoc_resp.variable; 2892 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2893 2894 if (!elems.supp_rates) { 2895 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2896 return false; 2897 } 2898 2899 ifmgd->aid = aid; 2900 ifmgd->tdls_chan_switch_prohibited = 2901 elems.ext_capab && elems.ext_capab_len >= 5 && 2902 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2903 2904 /* 2905 * Some APs are erroneously not including some information in their 2906 * (re)association response frames. Try to recover by using the data 2907 * from the beacon or probe response. This seems to afflict mobile 2908 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2909 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2910 */ 2911 if ((assoc_data->wmm && !elems.wmm_param) || 2912 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2913 (!elems.ht_cap_elem || !elems.ht_operation)) || 2914 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2915 (!elems.vht_cap_elem || !elems.vht_operation))) { 2916 const struct cfg80211_bss_ies *ies; 2917 struct ieee802_11_elems bss_elems; 2918 2919 rcu_read_lock(); 2920 ies = rcu_dereference(cbss->ies); 2921 if (ies) 2922 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2923 GFP_ATOMIC); 2924 rcu_read_unlock(); 2925 if (!bss_ies) 2926 return false; 2927 2928 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2929 false, &bss_elems); 2930 if (assoc_data->wmm && 2931 !elems.wmm_param && bss_elems.wmm_param) { 2932 elems.wmm_param = bss_elems.wmm_param; 2933 sdata_info(sdata, 2934 "AP bug: WMM param missing from AssocResp\n"); 2935 } 2936 2937 /* 2938 * Also check if we requested HT/VHT, otherwise the AP doesn't 2939 * have to include the IEs in the (re)association response. 2940 */ 2941 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2942 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2943 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2944 sdata_info(sdata, 2945 "AP bug: HT capability missing from AssocResp\n"); 2946 } 2947 if (!elems.ht_operation && bss_elems.ht_operation && 2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2949 elems.ht_operation = bss_elems.ht_operation; 2950 sdata_info(sdata, 2951 "AP bug: HT operation missing from AssocResp\n"); 2952 } 2953 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2954 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2955 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2956 sdata_info(sdata, 2957 "AP bug: VHT capa missing from AssocResp\n"); 2958 } 2959 if (!elems.vht_operation && bss_elems.vht_operation && 2960 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2961 elems.vht_operation = bss_elems.vht_operation; 2962 sdata_info(sdata, 2963 "AP bug: VHT operation missing from AssocResp\n"); 2964 } 2965 } 2966 2967 /* 2968 * We previously checked these in the beacon/probe response, so 2969 * they should be present here. This is just a safety net. 2970 */ 2971 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2972 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2973 sdata_info(sdata, 2974 "HT AP is missing WMM params or HT capability/operation\n"); 2975 ret = false; 2976 goto out; 2977 } 2978 2979 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2980 (!elems.vht_cap_elem || !elems.vht_operation)) { 2981 sdata_info(sdata, 2982 "VHT AP is missing VHT capability/operation\n"); 2983 ret = false; 2984 goto out; 2985 } 2986 2987 mutex_lock(&sdata->local->sta_mtx); 2988 /* 2989 * station info was already allocated and inserted before 2990 * the association and should be available to us 2991 */ 2992 sta = sta_info_get(sdata, cbss->bssid); 2993 if (WARN_ON(!sta)) { 2994 mutex_unlock(&sdata->local->sta_mtx); 2995 ret = false; 2996 goto out; 2997 } 2998 2999 sband = ieee80211_get_sband(sdata); 3000 if (!sband) { 3001 mutex_unlock(&sdata->local->sta_mtx); 3002 ret = false; 3003 goto out; 3004 } 3005 3006 /* Set up internal HT/VHT capabilities */ 3007 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3008 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3009 elems.ht_cap_elem, sta); 3010 3011 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3012 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3013 elems.vht_cap_elem, sta); 3014 3015 /* 3016 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3017 * in their association response, so ignore that data for our own 3018 * configuration. If it changed since the last beacon, we'll get the 3019 * next beacon and update then. 3020 */ 3021 3022 /* 3023 * If an operating mode notification IE is present, override the 3024 * NSS calculation (that would be done in rate_control_rate_init()) 3025 * and use the # of streams from that element. 3026 */ 3027 if (elems.opmode_notif && 3028 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3029 u8 nss; 3030 3031 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3032 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3033 nss += 1; 3034 sta->sta.rx_nss = nss; 3035 } 3036 3037 rate_control_rate_init(sta); 3038 3039 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3040 set_sta_flag(sta, WLAN_STA_MFP); 3041 sta->sta.mfp = true; 3042 } else { 3043 sta->sta.mfp = false; 3044 } 3045 3046 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3047 3048 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3049 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3050 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3051 if (err) { 3052 sdata_info(sdata, 3053 "failed to move station %pM to desired state\n", 3054 sta->sta.addr); 3055 WARN_ON(__sta_info_destroy(sta)); 3056 mutex_unlock(&sdata->local->sta_mtx); 3057 ret = false; 3058 goto out; 3059 } 3060 3061 mutex_unlock(&sdata->local->sta_mtx); 3062 3063 /* 3064 * Always handle WMM once after association regardless 3065 * of the first value the AP uses. Setting -1 here has 3066 * that effect because the AP values is an unsigned 3067 * 4-bit value. 3068 */ 3069 ifmgd->wmm_last_param_set = -1; 3070 3071 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3072 ieee80211_set_wmm_default(sdata, false, false); 3073 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3074 elems.wmm_param_len)) { 3075 /* still enable QoS since we might have HT/VHT */ 3076 ieee80211_set_wmm_default(sdata, false, true); 3077 /* set the disable-WMM flag in this case to disable 3078 * tracking WMM parameter changes in the beacon if 3079 * the parameters weren't actually valid. Doing so 3080 * avoids changing parameters very strangely when 3081 * the AP is going back and forth between valid and 3082 * invalid parameters. 3083 */ 3084 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3085 } 3086 changed |= BSS_CHANGED_QOS; 3087 3088 if (elems.max_idle_period_ie) { 3089 bss_conf->max_idle_period = 3090 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3091 bss_conf->protected_keep_alive = 3092 !!(elems.max_idle_period_ie->idle_options & 3093 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3094 changed |= BSS_CHANGED_KEEP_ALIVE; 3095 } else { 3096 bss_conf->max_idle_period = 0; 3097 bss_conf->protected_keep_alive = false; 3098 } 3099 3100 /* set AID and assoc capability, 3101 * ieee80211_set_associated() will tell the driver */ 3102 bss_conf->aid = aid; 3103 bss_conf->assoc_capability = capab_info; 3104 ieee80211_set_associated(sdata, cbss, changed); 3105 3106 /* 3107 * If we're using 4-addr mode, let the AP know that we're 3108 * doing so, so that it can create the STA VLAN on its side 3109 */ 3110 if (ifmgd->use_4addr) 3111 ieee80211_send_4addr_nullfunc(local, sdata); 3112 3113 /* 3114 * Start timer to probe the connection to the AP now. 3115 * Also start the timer that will detect beacon loss. 3116 */ 3117 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3118 ieee80211_sta_reset_beacon_monitor(sdata); 3119 3120 ret = true; 3121 out: 3122 kfree(bss_ies); 3123 return ret; 3124 } 3125 3126 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3127 struct ieee80211_mgmt *mgmt, 3128 size_t len) 3129 { 3130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3131 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3132 u16 capab_info, status_code, aid; 3133 struct ieee802_11_elems elems; 3134 int ac, uapsd_queues = -1; 3135 u8 *pos; 3136 bool reassoc; 3137 struct cfg80211_bss *bss; 3138 struct ieee80211_event event = { 3139 .type = MLME_EVENT, 3140 .u.mlme.data = ASSOC_EVENT, 3141 }; 3142 3143 sdata_assert_lock(sdata); 3144 3145 if (!assoc_data) 3146 return; 3147 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3148 return; 3149 3150 /* 3151 * AssocResp and ReassocResp have identical structure, so process both 3152 * of them in this function. 3153 */ 3154 3155 if (len < 24 + 6) 3156 return; 3157 3158 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3159 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3160 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3161 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3162 3163 sdata_info(sdata, 3164 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3165 reassoc ? "Rea" : "A", mgmt->sa, 3166 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3167 3168 if (assoc_data->fils_kek_len && 3169 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3170 return; 3171 3172 pos = mgmt->u.assoc_resp.variable; 3173 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3174 3175 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3176 elems.timeout_int && 3177 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3178 u32 tu, ms; 3179 tu = le32_to_cpu(elems.timeout_int->value); 3180 ms = tu * 1024 / 1000; 3181 sdata_info(sdata, 3182 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3183 mgmt->sa, tu, ms); 3184 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3185 assoc_data->timeout_started = true; 3186 if (ms > IEEE80211_ASSOC_TIMEOUT) 3187 run_again(sdata, assoc_data->timeout); 3188 return; 3189 } 3190 3191 bss = assoc_data->bss; 3192 3193 if (status_code != WLAN_STATUS_SUCCESS) { 3194 sdata_info(sdata, "%pM denied association (code=%d)\n", 3195 mgmt->sa, status_code); 3196 ieee80211_destroy_assoc_data(sdata, false, false); 3197 event.u.mlme.status = MLME_DENIED; 3198 event.u.mlme.reason = status_code; 3199 drv_event_callback(sdata->local, sdata, &event); 3200 } else { 3201 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3202 /* oops -- internal error -- send timeout for now */ 3203 ieee80211_destroy_assoc_data(sdata, false, false); 3204 cfg80211_assoc_timeout(sdata->dev, bss); 3205 return; 3206 } 3207 event.u.mlme.status = MLME_SUCCESS; 3208 drv_event_callback(sdata->local, sdata, &event); 3209 sdata_info(sdata, "associated\n"); 3210 3211 /* 3212 * destroy assoc_data afterwards, as otherwise an idle 3213 * recalc after assoc_data is NULL but before associated 3214 * is set can cause the interface to go idle 3215 */ 3216 ieee80211_destroy_assoc_data(sdata, true, false); 3217 3218 /* get uapsd queues configuration */ 3219 uapsd_queues = 0; 3220 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3221 if (sdata->tx_conf[ac].uapsd) 3222 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3223 } 3224 3225 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3226 } 3227 3228 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3229 struct ieee80211_mgmt *mgmt, size_t len, 3230 struct ieee80211_rx_status *rx_status, 3231 struct ieee802_11_elems *elems) 3232 { 3233 struct ieee80211_local *local = sdata->local; 3234 struct ieee80211_bss *bss; 3235 struct ieee80211_channel *channel; 3236 3237 sdata_assert_lock(sdata); 3238 3239 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3240 if (!channel) 3241 return; 3242 3243 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3244 channel); 3245 if (bss) { 3246 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3247 ieee80211_rx_bss_put(local, bss); 3248 } 3249 } 3250 3251 3252 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3253 struct sk_buff *skb) 3254 { 3255 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3256 struct ieee80211_if_managed *ifmgd; 3257 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3258 size_t baselen, len = skb->len; 3259 struct ieee802_11_elems elems; 3260 3261 ifmgd = &sdata->u.mgd; 3262 3263 sdata_assert_lock(sdata); 3264 3265 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3266 return; /* ignore ProbeResp to foreign address */ 3267 3268 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3269 if (baselen > len) 3270 return; 3271 3272 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3273 false, &elems); 3274 3275 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3276 3277 if (ifmgd->associated && 3278 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3279 ieee80211_reset_ap_probe(sdata); 3280 } 3281 3282 /* 3283 * This is the canonical list of information elements we care about, 3284 * the filter code also gives us all changes to the Microsoft OUI 3285 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3286 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3287 * changes to requested client power. 3288 * 3289 * We implement beacon filtering in software since that means we can 3290 * avoid processing the frame here and in cfg80211, and userspace 3291 * will not be able to tell whether the hardware supports it or not. 3292 * 3293 * XXX: This list needs to be dynamic -- userspace needs to be able to 3294 * add items it requires. It also needs to be able to tell us to 3295 * look out for other vendor IEs. 3296 */ 3297 static const u64 care_about_ies = 3298 (1ULL << WLAN_EID_COUNTRY) | 3299 (1ULL << WLAN_EID_ERP_INFO) | 3300 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3301 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3302 (1ULL << WLAN_EID_HT_CAPABILITY) | 3303 (1ULL << WLAN_EID_HT_OPERATION) | 3304 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3305 3306 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3307 struct ieee80211_mgmt *mgmt, size_t len, 3308 struct ieee80211_rx_status *rx_status) 3309 { 3310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3311 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3312 size_t baselen; 3313 struct ieee802_11_elems elems; 3314 struct ieee80211_local *local = sdata->local; 3315 struct ieee80211_chanctx_conf *chanctx_conf; 3316 struct ieee80211_channel *chan; 3317 struct sta_info *sta; 3318 u32 changed = 0; 3319 bool erp_valid; 3320 u8 erp_value = 0; 3321 u32 ncrc; 3322 u8 *bssid; 3323 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3324 3325 sdata_assert_lock(sdata); 3326 3327 /* Process beacon from the current BSS */ 3328 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3329 if (baselen > len) 3330 return; 3331 3332 rcu_read_lock(); 3333 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3334 if (!chanctx_conf) { 3335 rcu_read_unlock(); 3336 return; 3337 } 3338 3339 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3340 rcu_read_unlock(); 3341 return; 3342 } 3343 chan = chanctx_conf->def.chan; 3344 rcu_read_unlock(); 3345 3346 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3347 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3348 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3349 len - baselen, false, &elems); 3350 3351 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3352 if (elems.tim && !elems.parse_error) { 3353 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3354 ifmgd->dtim_period = tim_ie->dtim_period; 3355 } 3356 ifmgd->have_beacon = true; 3357 ifmgd->assoc_data->need_beacon = false; 3358 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3359 sdata->vif.bss_conf.sync_tsf = 3360 le64_to_cpu(mgmt->u.beacon.timestamp); 3361 sdata->vif.bss_conf.sync_device_ts = 3362 rx_status->device_timestamp; 3363 if (elems.tim) 3364 sdata->vif.bss_conf.sync_dtim_count = 3365 elems.tim->dtim_count; 3366 else 3367 sdata->vif.bss_conf.sync_dtim_count = 0; 3368 } 3369 /* continue assoc process */ 3370 ifmgd->assoc_data->timeout = jiffies; 3371 ifmgd->assoc_data->timeout_started = true; 3372 run_again(sdata, ifmgd->assoc_data->timeout); 3373 return; 3374 } 3375 3376 if (!ifmgd->associated || 3377 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3378 return; 3379 bssid = ifmgd->associated->bssid; 3380 3381 /* Track average RSSI from the Beacon frames of the current AP */ 3382 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3383 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3384 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3385 ifmgd->last_cqm_event_signal = 0; 3386 ifmgd->count_beacon_signal = 1; 3387 ifmgd->last_ave_beacon_signal = 0; 3388 } else { 3389 ifmgd->count_beacon_signal++; 3390 } 3391 3392 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3393 3394 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3395 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3396 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3397 int last_sig = ifmgd->last_ave_beacon_signal; 3398 struct ieee80211_event event = { 3399 .type = RSSI_EVENT, 3400 }; 3401 3402 /* 3403 * if signal crosses either of the boundaries, invoke callback 3404 * with appropriate parameters 3405 */ 3406 if (sig > ifmgd->rssi_max_thold && 3407 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3408 ifmgd->last_ave_beacon_signal = sig; 3409 event.u.rssi.data = RSSI_EVENT_HIGH; 3410 drv_event_callback(local, sdata, &event); 3411 } else if (sig < ifmgd->rssi_min_thold && 3412 (last_sig >= ifmgd->rssi_max_thold || 3413 last_sig == 0)) { 3414 ifmgd->last_ave_beacon_signal = sig; 3415 event.u.rssi.data = RSSI_EVENT_LOW; 3416 drv_event_callback(local, sdata, &event); 3417 } 3418 } 3419 3420 if (bss_conf->cqm_rssi_thold && 3421 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3422 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3423 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3424 int last_event = ifmgd->last_cqm_event_signal; 3425 int thold = bss_conf->cqm_rssi_thold; 3426 int hyst = bss_conf->cqm_rssi_hyst; 3427 3428 if (sig < thold && 3429 (last_event == 0 || sig < last_event - hyst)) { 3430 ifmgd->last_cqm_event_signal = sig; 3431 ieee80211_cqm_rssi_notify( 3432 &sdata->vif, 3433 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3434 sig, GFP_KERNEL); 3435 } else if (sig > thold && 3436 (last_event == 0 || sig > last_event + hyst)) { 3437 ifmgd->last_cqm_event_signal = sig; 3438 ieee80211_cqm_rssi_notify( 3439 &sdata->vif, 3440 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3441 sig, GFP_KERNEL); 3442 } 3443 } 3444 3445 if (bss_conf->cqm_rssi_low && 3446 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3447 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3448 int last_event = ifmgd->last_cqm_event_signal; 3449 int low = bss_conf->cqm_rssi_low; 3450 int high = bss_conf->cqm_rssi_high; 3451 3452 if (sig < low && 3453 (last_event == 0 || last_event >= low)) { 3454 ifmgd->last_cqm_event_signal = sig; 3455 ieee80211_cqm_rssi_notify( 3456 &sdata->vif, 3457 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3458 sig, GFP_KERNEL); 3459 } else if (sig > high && 3460 (last_event == 0 || last_event <= high)) { 3461 ifmgd->last_cqm_event_signal = sig; 3462 ieee80211_cqm_rssi_notify( 3463 &sdata->vif, 3464 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3465 sig, GFP_KERNEL); 3466 } 3467 } 3468 3469 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3470 mlme_dbg_ratelimited(sdata, 3471 "cancelling AP probe due to a received beacon\n"); 3472 ieee80211_reset_ap_probe(sdata); 3473 } 3474 3475 /* 3476 * Push the beacon loss detection into the future since 3477 * we are processing a beacon from the AP just now. 3478 */ 3479 ieee80211_sta_reset_beacon_monitor(sdata); 3480 3481 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3482 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3483 len - baselen, false, &elems, 3484 care_about_ies, ncrc); 3485 3486 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3487 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3488 if (local->hw.conf.dynamic_ps_timeout > 0) { 3489 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3490 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3491 ieee80211_hw_config(local, 3492 IEEE80211_CONF_CHANGE_PS); 3493 } 3494 ieee80211_send_nullfunc(local, sdata, false); 3495 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3496 local->pspolling = true; 3497 3498 /* 3499 * Here is assumed that the driver will be 3500 * able to send ps-poll frame and receive a 3501 * response even though power save mode is 3502 * enabled, but some drivers might require 3503 * to disable power save here. This needs 3504 * to be investigated. 3505 */ 3506 ieee80211_send_pspoll(local, sdata); 3507 } 3508 } 3509 3510 if (sdata->vif.p2p || 3511 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3512 struct ieee80211_p2p_noa_attr noa = {}; 3513 int ret; 3514 3515 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3516 len - baselen, 3517 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3518 (u8 *) &noa, sizeof(noa)); 3519 if (ret >= 2) { 3520 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3521 /* valid noa_attr and index changed */ 3522 sdata->u.mgd.p2p_noa_index = noa.index; 3523 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3524 changed |= BSS_CHANGED_P2P_PS; 3525 /* 3526 * make sure we update all information, the CRC 3527 * mechanism doesn't look at P2P attributes. 3528 */ 3529 ifmgd->beacon_crc_valid = false; 3530 } 3531 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3532 /* noa_attr not found and we had valid noa_attr before */ 3533 sdata->u.mgd.p2p_noa_index = -1; 3534 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3535 changed |= BSS_CHANGED_P2P_PS; 3536 ifmgd->beacon_crc_valid = false; 3537 } 3538 } 3539 3540 if (ifmgd->csa_waiting_bcn) 3541 ieee80211_chswitch_post_beacon(sdata); 3542 3543 /* 3544 * Update beacon timing and dtim count on every beacon appearance. This 3545 * will allow the driver to use the most updated values. Do it before 3546 * comparing this one with last received beacon. 3547 * IMPORTANT: These parameters would possibly be out of sync by the time 3548 * the driver will use them. The synchronized view is currently 3549 * guaranteed only in certain callbacks. 3550 */ 3551 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3552 sdata->vif.bss_conf.sync_tsf = 3553 le64_to_cpu(mgmt->u.beacon.timestamp); 3554 sdata->vif.bss_conf.sync_device_ts = 3555 rx_status->device_timestamp; 3556 if (elems.tim) 3557 sdata->vif.bss_conf.sync_dtim_count = 3558 elems.tim->dtim_count; 3559 else 3560 sdata->vif.bss_conf.sync_dtim_count = 0; 3561 } 3562 3563 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3564 return; 3565 ifmgd->beacon_crc = ncrc; 3566 ifmgd->beacon_crc_valid = true; 3567 3568 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3569 3570 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3571 rx_status->device_timestamp, 3572 &elems, true); 3573 3574 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3575 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3576 elems.wmm_param_len)) 3577 changed |= BSS_CHANGED_QOS; 3578 3579 /* 3580 * If we haven't had a beacon before, tell the driver about the 3581 * DTIM period (and beacon timing if desired) now. 3582 */ 3583 if (!ifmgd->have_beacon) { 3584 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3585 if (elems.tim) 3586 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3587 else 3588 bss_conf->dtim_period = 1; 3589 3590 changed |= BSS_CHANGED_BEACON_INFO; 3591 ifmgd->have_beacon = true; 3592 3593 mutex_lock(&local->iflist_mtx); 3594 ieee80211_recalc_ps(local); 3595 mutex_unlock(&local->iflist_mtx); 3596 3597 ieee80211_recalc_ps_vif(sdata); 3598 } 3599 3600 if (elems.erp_info) { 3601 erp_valid = true; 3602 erp_value = elems.erp_info[0]; 3603 } else { 3604 erp_valid = false; 3605 } 3606 changed |= ieee80211_handle_bss_capability(sdata, 3607 le16_to_cpu(mgmt->u.beacon.capab_info), 3608 erp_valid, erp_value); 3609 3610 mutex_lock(&local->sta_mtx); 3611 sta = sta_info_get(sdata, bssid); 3612 3613 if (ieee80211_config_bw(sdata, sta, 3614 elems.ht_cap_elem, elems.ht_operation, 3615 elems.vht_operation, bssid, &changed)) { 3616 mutex_unlock(&local->sta_mtx); 3617 sdata_info(sdata, 3618 "failed to follow AP %pM bandwidth change, disconnect\n", 3619 bssid); 3620 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3621 WLAN_REASON_DEAUTH_LEAVING, 3622 true, deauth_buf); 3623 ieee80211_report_disconnect(sdata, deauth_buf, 3624 sizeof(deauth_buf), true, 3625 WLAN_REASON_DEAUTH_LEAVING); 3626 return; 3627 } 3628 3629 if (sta && elems.opmode_notif) 3630 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3631 rx_status->band); 3632 mutex_unlock(&local->sta_mtx); 3633 3634 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3635 elems.country_elem, 3636 elems.country_elem_len, 3637 elems.pwr_constr_elem, 3638 elems.cisco_dtpc_elem); 3639 3640 ieee80211_bss_info_change_notify(sdata, changed); 3641 } 3642 3643 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3644 struct sk_buff *skb) 3645 { 3646 struct ieee80211_rx_status *rx_status; 3647 struct ieee80211_mgmt *mgmt; 3648 u16 fc; 3649 struct ieee802_11_elems elems; 3650 int ies_len; 3651 3652 rx_status = (struct ieee80211_rx_status *) skb->cb; 3653 mgmt = (struct ieee80211_mgmt *) skb->data; 3654 fc = le16_to_cpu(mgmt->frame_control); 3655 3656 sdata_lock(sdata); 3657 3658 switch (fc & IEEE80211_FCTL_STYPE) { 3659 case IEEE80211_STYPE_BEACON: 3660 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3661 break; 3662 case IEEE80211_STYPE_PROBE_RESP: 3663 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3664 break; 3665 case IEEE80211_STYPE_AUTH: 3666 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3667 break; 3668 case IEEE80211_STYPE_DEAUTH: 3669 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3670 break; 3671 case IEEE80211_STYPE_DISASSOC: 3672 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3673 break; 3674 case IEEE80211_STYPE_ASSOC_RESP: 3675 case IEEE80211_STYPE_REASSOC_RESP: 3676 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3677 break; 3678 case IEEE80211_STYPE_ACTION: 3679 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3680 ies_len = skb->len - 3681 offsetof(struct ieee80211_mgmt, 3682 u.action.u.chan_switch.variable); 3683 3684 if (ies_len < 0) 3685 break; 3686 3687 ieee802_11_parse_elems( 3688 mgmt->u.action.u.chan_switch.variable, 3689 ies_len, true, &elems); 3690 3691 if (elems.parse_error) 3692 break; 3693 3694 ieee80211_sta_process_chanswitch(sdata, 3695 rx_status->mactime, 3696 rx_status->device_timestamp, 3697 &elems, false); 3698 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3699 ies_len = skb->len - 3700 offsetof(struct ieee80211_mgmt, 3701 u.action.u.ext_chan_switch.variable); 3702 3703 if (ies_len < 0) 3704 break; 3705 3706 ieee802_11_parse_elems( 3707 mgmt->u.action.u.ext_chan_switch.variable, 3708 ies_len, true, &elems); 3709 3710 if (elems.parse_error) 3711 break; 3712 3713 /* for the handling code pretend this was also an IE */ 3714 elems.ext_chansw_ie = 3715 &mgmt->u.action.u.ext_chan_switch.data; 3716 3717 ieee80211_sta_process_chanswitch(sdata, 3718 rx_status->mactime, 3719 rx_status->device_timestamp, 3720 &elems, false); 3721 } 3722 break; 3723 } 3724 sdata_unlock(sdata); 3725 } 3726 3727 static void ieee80211_sta_timer(unsigned long data) 3728 { 3729 struct ieee80211_sub_if_data *sdata = 3730 (struct ieee80211_sub_if_data *) data; 3731 3732 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3733 } 3734 3735 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3736 u8 *bssid, u8 reason, bool tx) 3737 { 3738 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3739 3740 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3741 tx, frame_buf); 3742 3743 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3744 reason); 3745 } 3746 3747 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3748 { 3749 struct ieee80211_local *local = sdata->local; 3750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3751 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3752 u32 tx_flags = 0; 3753 u16 trans = 1; 3754 u16 status = 0; 3755 3756 sdata_assert_lock(sdata); 3757 3758 if (WARN_ON_ONCE(!auth_data)) 3759 return -EINVAL; 3760 3761 auth_data->tries++; 3762 3763 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3764 sdata_info(sdata, "authentication with %pM timed out\n", 3765 auth_data->bss->bssid); 3766 3767 /* 3768 * Most likely AP is not in the range so remove the 3769 * bss struct for that AP. 3770 */ 3771 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3772 3773 return -ETIMEDOUT; 3774 } 3775 3776 drv_mgd_prepare_tx(local, sdata); 3777 3778 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3779 auth_data->bss->bssid, auth_data->tries, 3780 IEEE80211_AUTH_MAX_TRIES); 3781 3782 auth_data->expected_transaction = 2; 3783 3784 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3785 trans = auth_data->sae_trans; 3786 status = auth_data->sae_status; 3787 auth_data->expected_transaction = trans; 3788 } 3789 3790 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3791 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3792 IEEE80211_TX_INTFL_MLME_CONN_TX; 3793 3794 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3795 auth_data->data, auth_data->data_len, 3796 auth_data->bss->bssid, 3797 auth_data->bss->bssid, NULL, 0, 0, 3798 tx_flags); 3799 3800 if (tx_flags == 0) { 3801 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3802 auth_data->timeout_started = true; 3803 run_again(sdata, auth_data->timeout); 3804 } else { 3805 auth_data->timeout = 3806 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3807 auth_data->timeout_started = true; 3808 run_again(sdata, auth_data->timeout); 3809 } 3810 3811 return 0; 3812 } 3813 3814 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3815 { 3816 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3817 struct ieee80211_local *local = sdata->local; 3818 3819 sdata_assert_lock(sdata); 3820 3821 assoc_data->tries++; 3822 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3823 sdata_info(sdata, "association with %pM timed out\n", 3824 assoc_data->bss->bssid); 3825 3826 /* 3827 * Most likely AP is not in the range so remove the 3828 * bss struct for that AP. 3829 */ 3830 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3831 3832 return -ETIMEDOUT; 3833 } 3834 3835 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3836 assoc_data->bss->bssid, assoc_data->tries, 3837 IEEE80211_ASSOC_MAX_TRIES); 3838 ieee80211_send_assoc(sdata); 3839 3840 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3841 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3842 assoc_data->timeout_started = true; 3843 run_again(sdata, assoc_data->timeout); 3844 } else { 3845 assoc_data->timeout = 3846 round_jiffies_up(jiffies + 3847 IEEE80211_ASSOC_TIMEOUT_LONG); 3848 assoc_data->timeout_started = true; 3849 run_again(sdata, assoc_data->timeout); 3850 } 3851 3852 return 0; 3853 } 3854 3855 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3856 __le16 fc, bool acked) 3857 { 3858 struct ieee80211_local *local = sdata->local; 3859 3860 sdata->u.mgd.status_fc = fc; 3861 sdata->u.mgd.status_acked = acked; 3862 sdata->u.mgd.status_received = true; 3863 3864 ieee80211_queue_work(&local->hw, &sdata->work); 3865 } 3866 3867 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3868 { 3869 struct ieee80211_local *local = sdata->local; 3870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3871 3872 sdata_lock(sdata); 3873 3874 if (ifmgd->status_received) { 3875 __le16 fc = ifmgd->status_fc; 3876 bool status_acked = ifmgd->status_acked; 3877 3878 ifmgd->status_received = false; 3879 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3880 if (status_acked) { 3881 ifmgd->auth_data->timeout = 3882 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3883 run_again(sdata, ifmgd->auth_data->timeout); 3884 } else { 3885 ifmgd->auth_data->timeout = jiffies - 1; 3886 } 3887 ifmgd->auth_data->timeout_started = true; 3888 } else if (ifmgd->assoc_data && 3889 (ieee80211_is_assoc_req(fc) || 3890 ieee80211_is_reassoc_req(fc))) { 3891 if (status_acked) { 3892 ifmgd->assoc_data->timeout = 3893 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3894 run_again(sdata, ifmgd->assoc_data->timeout); 3895 } else { 3896 ifmgd->assoc_data->timeout = jiffies - 1; 3897 } 3898 ifmgd->assoc_data->timeout_started = true; 3899 } 3900 } 3901 3902 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3903 time_after(jiffies, ifmgd->auth_data->timeout)) { 3904 if (ifmgd->auth_data->done) { 3905 /* 3906 * ok ... we waited for assoc but userspace didn't, 3907 * so let's just kill the auth data 3908 */ 3909 ieee80211_destroy_auth_data(sdata, false); 3910 } else if (ieee80211_auth(sdata)) { 3911 u8 bssid[ETH_ALEN]; 3912 struct ieee80211_event event = { 3913 .type = MLME_EVENT, 3914 .u.mlme.data = AUTH_EVENT, 3915 .u.mlme.status = MLME_TIMEOUT, 3916 }; 3917 3918 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3919 3920 ieee80211_destroy_auth_data(sdata, false); 3921 3922 cfg80211_auth_timeout(sdata->dev, bssid); 3923 drv_event_callback(sdata->local, sdata, &event); 3924 } 3925 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3926 run_again(sdata, ifmgd->auth_data->timeout); 3927 3928 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3929 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3930 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3931 ieee80211_do_assoc(sdata)) { 3932 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3933 struct ieee80211_event event = { 3934 .type = MLME_EVENT, 3935 .u.mlme.data = ASSOC_EVENT, 3936 .u.mlme.status = MLME_TIMEOUT, 3937 }; 3938 3939 ieee80211_destroy_assoc_data(sdata, false, false); 3940 cfg80211_assoc_timeout(sdata->dev, bss); 3941 drv_event_callback(sdata->local, sdata, &event); 3942 } 3943 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3944 run_again(sdata, ifmgd->assoc_data->timeout); 3945 3946 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3947 ifmgd->associated) { 3948 u8 bssid[ETH_ALEN]; 3949 int max_tries; 3950 3951 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3952 3953 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3954 max_tries = max_nullfunc_tries; 3955 else 3956 max_tries = max_probe_tries; 3957 3958 /* ACK received for nullfunc probing frame */ 3959 if (!ifmgd->probe_send_count) 3960 ieee80211_reset_ap_probe(sdata); 3961 else if (ifmgd->nullfunc_failed) { 3962 if (ifmgd->probe_send_count < max_tries) { 3963 mlme_dbg(sdata, 3964 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3965 bssid, ifmgd->probe_send_count, 3966 max_tries); 3967 ieee80211_mgd_probe_ap_send(sdata); 3968 } else { 3969 mlme_dbg(sdata, 3970 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3971 bssid); 3972 ieee80211_sta_connection_lost(sdata, bssid, 3973 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3974 false); 3975 } 3976 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3977 run_again(sdata, ifmgd->probe_timeout); 3978 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3979 mlme_dbg(sdata, 3980 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3981 bssid, probe_wait_ms); 3982 ieee80211_sta_connection_lost(sdata, bssid, 3983 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3984 } else if (ifmgd->probe_send_count < max_tries) { 3985 mlme_dbg(sdata, 3986 "No probe response from AP %pM after %dms, try %d/%i\n", 3987 bssid, probe_wait_ms, 3988 ifmgd->probe_send_count, max_tries); 3989 ieee80211_mgd_probe_ap_send(sdata); 3990 } else { 3991 /* 3992 * We actually lost the connection ... or did we? 3993 * Let's make sure! 3994 */ 3995 mlme_dbg(sdata, 3996 "No probe response from AP %pM after %dms, disconnecting.\n", 3997 bssid, probe_wait_ms); 3998 3999 ieee80211_sta_connection_lost(sdata, bssid, 4000 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4001 } 4002 } 4003 4004 sdata_unlock(sdata); 4005 } 4006 4007 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 4008 { 4009 struct ieee80211_sub_if_data *sdata = 4010 (struct ieee80211_sub_if_data *) data; 4011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4012 4013 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4014 return; 4015 4016 sdata->u.mgd.connection_loss = false; 4017 ieee80211_queue_work(&sdata->local->hw, 4018 &sdata->u.mgd.beacon_connection_loss_work); 4019 } 4020 4021 static void ieee80211_sta_conn_mon_timer(unsigned long data) 4022 { 4023 struct ieee80211_sub_if_data *sdata = 4024 (struct ieee80211_sub_if_data *) data; 4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4026 struct ieee80211_local *local = sdata->local; 4027 4028 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4029 return; 4030 4031 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4032 } 4033 4034 static void ieee80211_sta_monitor_work(struct work_struct *work) 4035 { 4036 struct ieee80211_sub_if_data *sdata = 4037 container_of(work, struct ieee80211_sub_if_data, 4038 u.mgd.monitor_work); 4039 4040 ieee80211_mgd_probe_ap(sdata, false); 4041 } 4042 4043 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4044 { 4045 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4046 __ieee80211_stop_poll(sdata); 4047 4048 /* let's probe the connection once */ 4049 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4050 ieee80211_queue_work(&sdata->local->hw, 4051 &sdata->u.mgd.monitor_work); 4052 } 4053 } 4054 4055 #ifdef CONFIG_PM 4056 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4057 { 4058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4059 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4060 4061 sdata_lock(sdata); 4062 4063 if (ifmgd->auth_data || ifmgd->assoc_data) { 4064 const u8 *bssid = ifmgd->auth_data ? 4065 ifmgd->auth_data->bss->bssid : 4066 ifmgd->assoc_data->bss->bssid; 4067 4068 /* 4069 * If we are trying to authenticate / associate while suspending, 4070 * cfg80211 won't know and won't actually abort those attempts, 4071 * thus we need to do that ourselves. 4072 */ 4073 ieee80211_send_deauth_disassoc(sdata, bssid, 4074 IEEE80211_STYPE_DEAUTH, 4075 WLAN_REASON_DEAUTH_LEAVING, 4076 false, frame_buf); 4077 if (ifmgd->assoc_data) 4078 ieee80211_destroy_assoc_data(sdata, false, true); 4079 if (ifmgd->auth_data) 4080 ieee80211_destroy_auth_data(sdata, false); 4081 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4082 IEEE80211_DEAUTH_FRAME_LEN); 4083 } 4084 4085 /* This is a bit of a hack - we should find a better and more generic 4086 * solution to this. Normally when suspending, cfg80211 will in fact 4087 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4088 * auth (not so important) or assoc (this is the problem) process. 4089 * 4090 * As a consequence, it can happen that we are in the process of both 4091 * associating and suspending, and receive an association response 4092 * after cfg80211 has checked if it needs to disconnect, but before 4093 * we actually set the flag to drop incoming frames. This will then 4094 * cause the workqueue flush to process the association response in 4095 * the suspend, resulting in a successful association just before it 4096 * tries to remove the interface from the driver, which now though 4097 * has a channel context assigned ... this results in issues. 4098 * 4099 * To work around this (for now) simply deauth here again if we're 4100 * now connected. 4101 */ 4102 if (ifmgd->associated && !sdata->local->wowlan) { 4103 u8 bssid[ETH_ALEN]; 4104 struct cfg80211_deauth_request req = { 4105 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4106 .bssid = bssid, 4107 }; 4108 4109 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4110 ieee80211_mgd_deauth(sdata, &req); 4111 } 4112 4113 sdata_unlock(sdata); 4114 } 4115 4116 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4117 { 4118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4119 4120 sdata_lock(sdata); 4121 if (!ifmgd->associated) { 4122 sdata_unlock(sdata); 4123 return; 4124 } 4125 4126 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4127 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4128 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4129 ieee80211_sta_connection_lost(sdata, 4130 ifmgd->associated->bssid, 4131 WLAN_REASON_UNSPECIFIED, 4132 true); 4133 sdata_unlock(sdata); 4134 return; 4135 } 4136 sdata_unlock(sdata); 4137 } 4138 #endif 4139 4140 /* interface setup */ 4141 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4142 { 4143 struct ieee80211_if_managed *ifmgd; 4144 4145 ifmgd = &sdata->u.mgd; 4146 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4147 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4148 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4149 ieee80211_beacon_connection_loss_work); 4150 INIT_WORK(&ifmgd->csa_connection_drop_work, 4151 ieee80211_csa_connection_drop_work); 4152 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4153 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4154 ieee80211_tdls_peer_del_work); 4155 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4156 (unsigned long) sdata); 4157 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4158 (unsigned long) sdata); 4159 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4160 (unsigned long) sdata); 4161 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4162 (unsigned long) sdata); 4163 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4164 ieee80211_sta_handle_tspec_ac_params_wk); 4165 4166 ifmgd->flags = 0; 4167 ifmgd->powersave = sdata->wdev.ps; 4168 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4169 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4170 ifmgd->p2p_noa_index = -1; 4171 4172 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4173 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4174 else 4175 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4176 4177 /* Setup TDLS data */ 4178 spin_lock_init(&ifmgd->teardown_lock); 4179 ifmgd->teardown_skb = NULL; 4180 ifmgd->orig_teardown_skb = NULL; 4181 } 4182 4183 /* scan finished notification */ 4184 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4185 { 4186 struct ieee80211_sub_if_data *sdata; 4187 4188 /* Restart STA timers */ 4189 rcu_read_lock(); 4190 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4191 if (ieee80211_sdata_running(sdata)) 4192 ieee80211_restart_sta_timer(sdata); 4193 } 4194 rcu_read_unlock(); 4195 } 4196 4197 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4198 struct cfg80211_bss *cbss) 4199 { 4200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4201 const u8 *ht_cap_ie, *vht_cap_ie; 4202 const struct ieee80211_ht_cap *ht_cap; 4203 const struct ieee80211_vht_cap *vht_cap; 4204 u8 chains = 1; 4205 4206 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4207 return chains; 4208 4209 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4210 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4211 ht_cap = (void *)(ht_cap_ie + 2); 4212 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4213 /* 4214 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4215 * "Tx Unequal Modulation Supported" fields. 4216 */ 4217 } 4218 4219 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4220 return chains; 4221 4222 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4223 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4224 u8 nss; 4225 u16 tx_mcs_map; 4226 4227 vht_cap = (void *)(vht_cap_ie + 2); 4228 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4229 for (nss = 8; nss > 0; nss--) { 4230 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4231 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4232 break; 4233 } 4234 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4235 chains = max(chains, nss); 4236 } 4237 4238 return chains; 4239 } 4240 4241 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4242 struct cfg80211_bss *cbss) 4243 { 4244 struct ieee80211_local *local = sdata->local; 4245 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4246 const struct ieee80211_ht_cap *ht_cap = NULL; 4247 const struct ieee80211_ht_operation *ht_oper = NULL; 4248 const struct ieee80211_vht_operation *vht_oper = NULL; 4249 struct ieee80211_supported_band *sband; 4250 struct cfg80211_chan_def chandef; 4251 int ret; 4252 u32 i; 4253 bool have_80mhz; 4254 4255 sband = local->hw.wiphy->bands[cbss->channel->band]; 4256 4257 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4258 IEEE80211_STA_DISABLE_80P80MHZ | 4259 IEEE80211_STA_DISABLE_160MHZ); 4260 4261 rcu_read_lock(); 4262 4263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4264 sband->ht_cap.ht_supported) { 4265 const u8 *ht_oper_ie, *ht_cap_ie; 4266 4267 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4268 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4269 ht_oper = (void *)(ht_oper_ie + 2); 4270 4271 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4272 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4273 ht_cap = (void *)(ht_cap_ie + 2); 4274 4275 if (!ht_cap) { 4276 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4277 ht_oper = NULL; 4278 } 4279 } 4280 4281 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4282 sband->vht_cap.vht_supported) { 4283 const u8 *vht_oper_ie, *vht_cap; 4284 4285 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4286 WLAN_EID_VHT_OPERATION); 4287 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4288 vht_oper = (void *)(vht_oper_ie + 2); 4289 if (vht_oper && !ht_oper) { 4290 vht_oper = NULL; 4291 sdata_info(sdata, 4292 "AP advertised VHT without HT, disabling both\n"); 4293 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4294 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4295 } 4296 4297 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4298 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4299 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4300 vht_oper = NULL; 4301 } 4302 } 4303 4304 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4305 have_80mhz = false; 4306 for (i = 0; i < sband->n_channels; i++) { 4307 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4308 IEEE80211_CHAN_NO_80MHZ)) 4309 continue; 4310 4311 have_80mhz = true; 4312 break; 4313 } 4314 4315 if (!have_80mhz) 4316 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4317 4318 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4319 cbss->channel, 4320 ht_cap, ht_oper, vht_oper, 4321 &chandef, false); 4322 4323 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4324 local->rx_chains); 4325 4326 rcu_read_unlock(); 4327 4328 /* will change later if needed */ 4329 sdata->smps_mode = IEEE80211_SMPS_OFF; 4330 4331 mutex_lock(&local->mtx); 4332 /* 4333 * If this fails (possibly due to channel context sharing 4334 * on incompatible channels, e.g. 80+80 and 160 sharing the 4335 * same control channel) try to use a smaller bandwidth. 4336 */ 4337 ret = ieee80211_vif_use_channel(sdata, &chandef, 4338 IEEE80211_CHANCTX_SHARED); 4339 4340 /* don't downgrade for 5 and 10 MHz channels, though. */ 4341 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4342 chandef.width == NL80211_CHAN_WIDTH_10) 4343 goto out; 4344 4345 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4346 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4347 ret = ieee80211_vif_use_channel(sdata, &chandef, 4348 IEEE80211_CHANCTX_SHARED); 4349 } 4350 out: 4351 mutex_unlock(&local->mtx); 4352 return ret; 4353 } 4354 4355 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4356 struct cfg80211_bss *cbss, bool assoc, 4357 bool override) 4358 { 4359 struct ieee80211_local *local = sdata->local; 4360 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4361 struct ieee80211_bss *bss = (void *)cbss->priv; 4362 struct sta_info *new_sta = NULL; 4363 struct ieee80211_supported_band *sband; 4364 bool have_sta = false; 4365 int err; 4366 4367 sband = local->hw.wiphy->bands[cbss->channel->band]; 4368 4369 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4370 return -EINVAL; 4371 4372 /* If a reconfig is happening, bail out */ 4373 if (local->in_reconfig) 4374 return -EBUSY; 4375 4376 if (assoc) { 4377 rcu_read_lock(); 4378 have_sta = sta_info_get(sdata, cbss->bssid); 4379 rcu_read_unlock(); 4380 } 4381 4382 if (!have_sta) { 4383 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4384 if (!new_sta) 4385 return -ENOMEM; 4386 } 4387 4388 /* 4389 * Set up the information for the new channel before setting the 4390 * new channel. We can't - completely race-free - change the basic 4391 * rates bitmap and the channel (sband) that it refers to, but if 4392 * we set it up before we at least avoid calling into the driver's 4393 * bss_info_changed() method with invalid information (since we do 4394 * call that from changing the channel - only for IDLE and perhaps 4395 * some others, but ...). 4396 * 4397 * So to avoid that, just set up all the new information before the 4398 * channel, but tell the driver to apply it only afterwards, since 4399 * it might need the new channel for that. 4400 */ 4401 if (new_sta) { 4402 u32 rates = 0, basic_rates = 0; 4403 bool have_higher_than_11mbit; 4404 int min_rate = INT_MAX, min_rate_index = -1; 4405 const struct cfg80211_bss_ies *ies; 4406 int shift = ieee80211_vif_get_shift(&sdata->vif); 4407 4408 ieee80211_get_rates(sband, bss->supp_rates, 4409 bss->supp_rates_len, 4410 &rates, &basic_rates, 4411 &have_higher_than_11mbit, 4412 &min_rate, &min_rate_index, 4413 shift); 4414 4415 /* 4416 * This used to be a workaround for basic rates missing 4417 * in the association response frame. Now that we no 4418 * longer use the basic rates from there, it probably 4419 * doesn't happen any more, but keep the workaround so 4420 * in case some *other* APs are buggy in different ways 4421 * we can connect -- with a warning. 4422 */ 4423 if (!basic_rates && min_rate_index >= 0) { 4424 sdata_info(sdata, 4425 "No basic rates, using min rate instead\n"); 4426 basic_rates = BIT(min_rate_index); 4427 } 4428 4429 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4430 sdata->vif.bss_conf.basic_rates = basic_rates; 4431 4432 /* cf. IEEE 802.11 9.2.12 */ 4433 if (cbss->channel->band == NL80211_BAND_2GHZ && 4434 have_higher_than_11mbit) 4435 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4436 else 4437 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4438 4439 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4440 4441 /* set timing information */ 4442 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4443 rcu_read_lock(); 4444 ies = rcu_dereference(cbss->beacon_ies); 4445 if (ies) { 4446 const u8 *tim_ie; 4447 4448 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4449 sdata->vif.bss_conf.sync_device_ts = 4450 bss->device_ts_beacon; 4451 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4452 ies->data, ies->len); 4453 if (tim_ie && tim_ie[1] >= 2) 4454 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4455 else 4456 sdata->vif.bss_conf.sync_dtim_count = 0; 4457 } else if (!ieee80211_hw_check(&sdata->local->hw, 4458 TIMING_BEACON_ONLY)) { 4459 ies = rcu_dereference(cbss->proberesp_ies); 4460 /* must be non-NULL since beacon IEs were NULL */ 4461 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4462 sdata->vif.bss_conf.sync_device_ts = 4463 bss->device_ts_presp; 4464 sdata->vif.bss_conf.sync_dtim_count = 0; 4465 } else { 4466 sdata->vif.bss_conf.sync_tsf = 0; 4467 sdata->vif.bss_conf.sync_device_ts = 0; 4468 sdata->vif.bss_conf.sync_dtim_count = 0; 4469 } 4470 rcu_read_unlock(); 4471 } 4472 4473 if (new_sta || override) { 4474 err = ieee80211_prep_channel(sdata, cbss); 4475 if (err) { 4476 if (new_sta) 4477 sta_info_free(local, new_sta); 4478 return -EINVAL; 4479 } 4480 } 4481 4482 if (new_sta) { 4483 /* 4484 * tell driver about BSSID, basic rates and timing 4485 * this was set up above, before setting the channel 4486 */ 4487 ieee80211_bss_info_change_notify(sdata, 4488 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4489 BSS_CHANGED_BEACON_INT); 4490 4491 if (assoc) 4492 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4493 4494 err = sta_info_insert(new_sta); 4495 new_sta = NULL; 4496 if (err) { 4497 sdata_info(sdata, 4498 "failed to insert STA entry for the AP (error %d)\n", 4499 err); 4500 return err; 4501 } 4502 } else 4503 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4504 4505 /* Cancel scan to ensure that nothing interferes with connection */ 4506 if (local->scanning) 4507 ieee80211_scan_cancel(local); 4508 4509 return 0; 4510 } 4511 4512 /* config hooks */ 4513 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4514 struct cfg80211_auth_request *req) 4515 { 4516 struct ieee80211_local *local = sdata->local; 4517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4518 struct ieee80211_mgd_auth_data *auth_data; 4519 u16 auth_alg; 4520 int err; 4521 4522 /* prepare auth data structure */ 4523 4524 switch (req->auth_type) { 4525 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4526 auth_alg = WLAN_AUTH_OPEN; 4527 break; 4528 case NL80211_AUTHTYPE_SHARED_KEY: 4529 if (IS_ERR(local->wep_tx_tfm)) 4530 return -EOPNOTSUPP; 4531 auth_alg = WLAN_AUTH_SHARED_KEY; 4532 break; 4533 case NL80211_AUTHTYPE_FT: 4534 auth_alg = WLAN_AUTH_FT; 4535 break; 4536 case NL80211_AUTHTYPE_NETWORK_EAP: 4537 auth_alg = WLAN_AUTH_LEAP; 4538 break; 4539 case NL80211_AUTHTYPE_SAE: 4540 auth_alg = WLAN_AUTH_SAE; 4541 break; 4542 case NL80211_AUTHTYPE_FILS_SK: 4543 auth_alg = WLAN_AUTH_FILS_SK; 4544 break; 4545 case NL80211_AUTHTYPE_FILS_SK_PFS: 4546 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4547 break; 4548 case NL80211_AUTHTYPE_FILS_PK: 4549 auth_alg = WLAN_AUTH_FILS_PK; 4550 break; 4551 default: 4552 return -EOPNOTSUPP; 4553 } 4554 4555 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4556 req->ie_len, GFP_KERNEL); 4557 if (!auth_data) 4558 return -ENOMEM; 4559 4560 auth_data->bss = req->bss; 4561 4562 if (req->auth_data_len >= 4) { 4563 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4564 __le16 *pos = (__le16 *) req->auth_data; 4565 4566 auth_data->sae_trans = le16_to_cpu(pos[0]); 4567 auth_data->sae_status = le16_to_cpu(pos[1]); 4568 } 4569 memcpy(auth_data->data, req->auth_data + 4, 4570 req->auth_data_len - 4); 4571 auth_data->data_len += req->auth_data_len - 4; 4572 } 4573 4574 if (req->ie && req->ie_len) { 4575 memcpy(&auth_data->data[auth_data->data_len], 4576 req->ie, req->ie_len); 4577 auth_data->data_len += req->ie_len; 4578 } 4579 4580 if (req->key && req->key_len) { 4581 auth_data->key_len = req->key_len; 4582 auth_data->key_idx = req->key_idx; 4583 memcpy(auth_data->key, req->key, req->key_len); 4584 } 4585 4586 auth_data->algorithm = auth_alg; 4587 4588 /* try to authenticate/probe */ 4589 4590 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4591 ifmgd->assoc_data) { 4592 err = -EBUSY; 4593 goto err_free; 4594 } 4595 4596 if (ifmgd->auth_data) 4597 ieee80211_destroy_auth_data(sdata, false); 4598 4599 /* prep auth_data so we don't go into idle on disassoc */ 4600 ifmgd->auth_data = auth_data; 4601 4602 if (ifmgd->associated) { 4603 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4604 4605 sdata_info(sdata, 4606 "disconnect from AP %pM for new auth to %pM\n", 4607 ifmgd->associated->bssid, req->bss->bssid); 4608 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4609 WLAN_REASON_UNSPECIFIED, 4610 false, frame_buf); 4611 4612 ieee80211_report_disconnect(sdata, frame_buf, 4613 sizeof(frame_buf), true, 4614 WLAN_REASON_UNSPECIFIED); 4615 } 4616 4617 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4618 4619 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4620 if (err) 4621 goto err_clear; 4622 4623 err = ieee80211_auth(sdata); 4624 if (err) { 4625 sta_info_destroy_addr(sdata, req->bss->bssid); 4626 goto err_clear; 4627 } 4628 4629 /* hold our own reference */ 4630 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4631 return 0; 4632 4633 err_clear: 4634 eth_zero_addr(ifmgd->bssid); 4635 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4636 ifmgd->auth_data = NULL; 4637 mutex_lock(&sdata->local->mtx); 4638 ieee80211_vif_release_channel(sdata); 4639 mutex_unlock(&sdata->local->mtx); 4640 err_free: 4641 kfree(auth_data); 4642 return err; 4643 } 4644 4645 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4646 struct cfg80211_assoc_request *req) 4647 { 4648 struct ieee80211_local *local = sdata->local; 4649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4650 struct ieee80211_bss *bss = (void *)req->bss->priv; 4651 struct ieee80211_mgd_assoc_data *assoc_data; 4652 const struct cfg80211_bss_ies *beacon_ies; 4653 struct ieee80211_supported_band *sband; 4654 const u8 *ssidie, *ht_ie, *vht_ie; 4655 int i, err; 4656 bool override = false; 4657 4658 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4659 if (!assoc_data) 4660 return -ENOMEM; 4661 4662 rcu_read_lock(); 4663 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4664 if (!ssidie) { 4665 rcu_read_unlock(); 4666 kfree(assoc_data); 4667 return -EINVAL; 4668 } 4669 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4670 assoc_data->ssid_len = ssidie[1]; 4671 rcu_read_unlock(); 4672 4673 if (ifmgd->associated) { 4674 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4675 4676 sdata_info(sdata, 4677 "disconnect from AP %pM for new assoc to %pM\n", 4678 ifmgd->associated->bssid, req->bss->bssid); 4679 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4680 WLAN_REASON_UNSPECIFIED, 4681 false, frame_buf); 4682 4683 ieee80211_report_disconnect(sdata, frame_buf, 4684 sizeof(frame_buf), true, 4685 WLAN_REASON_UNSPECIFIED); 4686 } 4687 4688 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4689 err = -EBUSY; 4690 goto err_free; 4691 } 4692 4693 if (ifmgd->assoc_data) { 4694 err = -EBUSY; 4695 goto err_free; 4696 } 4697 4698 if (ifmgd->auth_data) { 4699 bool match; 4700 4701 /* keep sta info, bssid if matching */ 4702 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4703 ieee80211_destroy_auth_data(sdata, match); 4704 } 4705 4706 /* prepare assoc data */ 4707 4708 ifmgd->beacon_crc_valid = false; 4709 4710 assoc_data->wmm = bss->wmm_used && 4711 (local->hw.queues >= IEEE80211_NUM_ACS); 4712 4713 /* 4714 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4715 * We still associate in non-HT mode (11a/b/g) if any one of these 4716 * ciphers is configured as pairwise. 4717 * We can set this to true for non-11n hardware, that'll be checked 4718 * separately along with the peer capabilities. 4719 */ 4720 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4721 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4722 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4723 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4725 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4726 netdev_info(sdata->dev, 4727 "disabling HT/VHT due to WEP/TKIP use\n"); 4728 } 4729 } 4730 4731 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4732 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4733 if (!sband->ht_cap.ht_supported || 4734 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4735 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4736 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4737 if (!bss->wmm_used && 4738 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4739 netdev_info(sdata->dev, 4740 "disabling HT as WMM/QoS is not supported by the AP\n"); 4741 } 4742 4743 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4744 if (!sband->vht_cap.vht_supported || 4745 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4746 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4747 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4748 if (!bss->wmm_used && 4749 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4750 netdev_info(sdata->dev, 4751 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4752 } 4753 4754 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4755 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4756 sizeof(ifmgd->ht_capa_mask)); 4757 4758 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4759 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4760 sizeof(ifmgd->vht_capa_mask)); 4761 4762 if (req->ie && req->ie_len) { 4763 memcpy(assoc_data->ie, req->ie, req->ie_len); 4764 assoc_data->ie_len = req->ie_len; 4765 } 4766 4767 if (req->fils_kek) { 4768 /* should already be checked in cfg80211 - so warn */ 4769 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4770 err = -EINVAL; 4771 goto err_free; 4772 } 4773 memcpy(assoc_data->fils_kek, req->fils_kek, 4774 req->fils_kek_len); 4775 assoc_data->fils_kek_len = req->fils_kek_len; 4776 } 4777 4778 if (req->fils_nonces) 4779 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4780 2 * FILS_NONCE_LEN); 4781 4782 assoc_data->bss = req->bss; 4783 4784 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4785 if (ifmgd->powersave) 4786 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4787 else 4788 sdata->smps_mode = IEEE80211_SMPS_OFF; 4789 } else 4790 sdata->smps_mode = ifmgd->req_smps; 4791 4792 assoc_data->capability = req->bss->capability; 4793 assoc_data->supp_rates = bss->supp_rates; 4794 assoc_data->supp_rates_len = bss->supp_rates_len; 4795 4796 rcu_read_lock(); 4797 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4798 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4799 assoc_data->ap_ht_param = 4800 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4801 else 4802 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4803 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4804 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4805 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4806 sizeof(struct ieee80211_vht_cap)); 4807 else 4808 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4809 rcu_read_unlock(); 4810 4811 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4812 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4813 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4814 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4815 4816 if (bss->wmm_used && bss->uapsd_supported && 4817 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4818 assoc_data->uapsd = true; 4819 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4820 } else { 4821 assoc_data->uapsd = false; 4822 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4823 } 4824 4825 if (req->prev_bssid) 4826 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4827 4828 if (req->use_mfp) { 4829 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4830 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4831 } else { 4832 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4833 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4834 } 4835 4836 if (req->flags & ASSOC_REQ_USE_RRM) 4837 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4838 else 4839 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4840 4841 if (req->crypto.control_port) 4842 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4843 else 4844 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4845 4846 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4847 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4848 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4849 sdata->vif.type); 4850 4851 /* kick off associate process */ 4852 4853 ifmgd->assoc_data = assoc_data; 4854 ifmgd->dtim_period = 0; 4855 ifmgd->have_beacon = false; 4856 4857 /* override HT/VHT configuration only if the AP and we support it */ 4858 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4859 struct ieee80211_sta_ht_cap sta_ht_cap; 4860 4861 if (req->flags & ASSOC_REQ_DISABLE_HT) 4862 override = true; 4863 4864 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4865 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4866 4867 /* check for 40 MHz disable override */ 4868 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4869 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4870 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4871 override = true; 4872 4873 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4874 req->flags & ASSOC_REQ_DISABLE_VHT) 4875 override = true; 4876 } 4877 4878 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4879 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4880 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4881 } 4882 4883 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4884 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4885 4886 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4887 if (err) 4888 goto err_clear; 4889 4890 rcu_read_lock(); 4891 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4892 4893 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4894 !beacon_ies) { 4895 /* 4896 * Wait up to one beacon interval ... 4897 * should this be more if we miss one? 4898 */ 4899 sdata_info(sdata, "waiting for beacon from %pM\n", 4900 ifmgd->bssid); 4901 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4902 assoc_data->timeout_started = true; 4903 assoc_data->need_beacon = true; 4904 } else if (beacon_ies) { 4905 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4906 beacon_ies->data, 4907 beacon_ies->len); 4908 u8 dtim_count = 0; 4909 4910 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4911 const struct ieee80211_tim_ie *tim; 4912 tim = (void *)(tim_ie + 2); 4913 ifmgd->dtim_period = tim->dtim_period; 4914 dtim_count = tim->dtim_count; 4915 } 4916 ifmgd->have_beacon = true; 4917 assoc_data->timeout = jiffies; 4918 assoc_data->timeout_started = true; 4919 4920 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4921 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4922 sdata->vif.bss_conf.sync_device_ts = 4923 bss->device_ts_beacon; 4924 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4925 } 4926 } else { 4927 assoc_data->timeout = jiffies; 4928 assoc_data->timeout_started = true; 4929 } 4930 rcu_read_unlock(); 4931 4932 run_again(sdata, assoc_data->timeout); 4933 4934 if (bss->corrupt_data) { 4935 char *corrupt_type = "data"; 4936 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4937 if (bss->corrupt_data & 4938 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4939 corrupt_type = "beacon and probe response"; 4940 else 4941 corrupt_type = "beacon"; 4942 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4943 corrupt_type = "probe response"; 4944 sdata_info(sdata, "associating with AP with corrupt %s\n", 4945 corrupt_type); 4946 } 4947 4948 return 0; 4949 err_clear: 4950 eth_zero_addr(ifmgd->bssid); 4951 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4952 ifmgd->assoc_data = NULL; 4953 err_free: 4954 kfree(assoc_data); 4955 return err; 4956 } 4957 4958 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4959 struct cfg80211_deauth_request *req) 4960 { 4961 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4962 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4963 bool tx = !req->local_state_change; 4964 4965 if (ifmgd->auth_data && 4966 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4967 sdata_info(sdata, 4968 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4969 req->bssid, req->reason_code, 4970 ieee80211_get_reason_code_string(req->reason_code)); 4971 4972 drv_mgd_prepare_tx(sdata->local, sdata); 4973 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4974 IEEE80211_STYPE_DEAUTH, 4975 req->reason_code, tx, 4976 frame_buf); 4977 ieee80211_destroy_auth_data(sdata, false); 4978 ieee80211_report_disconnect(sdata, frame_buf, 4979 sizeof(frame_buf), true, 4980 req->reason_code); 4981 4982 return 0; 4983 } 4984 4985 if (ifmgd->assoc_data && 4986 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4987 sdata_info(sdata, 4988 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4989 req->bssid, req->reason_code, 4990 ieee80211_get_reason_code_string(req->reason_code)); 4991 4992 drv_mgd_prepare_tx(sdata->local, sdata); 4993 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4994 IEEE80211_STYPE_DEAUTH, 4995 req->reason_code, tx, 4996 frame_buf); 4997 ieee80211_destroy_assoc_data(sdata, false, true); 4998 ieee80211_report_disconnect(sdata, frame_buf, 4999 sizeof(frame_buf), true, 5000 req->reason_code); 5001 return 0; 5002 } 5003 5004 if (ifmgd->associated && 5005 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5006 sdata_info(sdata, 5007 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5008 req->bssid, req->reason_code, 5009 ieee80211_get_reason_code_string(req->reason_code)); 5010 5011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5012 req->reason_code, tx, frame_buf); 5013 ieee80211_report_disconnect(sdata, frame_buf, 5014 sizeof(frame_buf), true, 5015 req->reason_code); 5016 return 0; 5017 } 5018 5019 return -ENOTCONN; 5020 } 5021 5022 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5023 struct cfg80211_disassoc_request *req) 5024 { 5025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5026 u8 bssid[ETH_ALEN]; 5027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5028 5029 /* 5030 * cfg80211 should catch this ... but it's racy since 5031 * we can receive a disassoc frame, process it, hand it 5032 * to cfg80211 while that's in a locked section already 5033 * trying to tell us that the user wants to disconnect. 5034 */ 5035 if (ifmgd->associated != req->bss) 5036 return -ENOLINK; 5037 5038 sdata_info(sdata, 5039 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5040 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5041 5042 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5043 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5044 req->reason_code, !req->local_state_change, 5045 frame_buf); 5046 5047 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5048 req->reason_code); 5049 5050 return 0; 5051 } 5052 5053 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5054 { 5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5056 5057 /* 5058 * Make sure some work items will not run after this, 5059 * they will not do anything but might not have been 5060 * cancelled when disconnecting. 5061 */ 5062 cancel_work_sync(&ifmgd->monitor_work); 5063 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5064 cancel_work_sync(&ifmgd->request_smps_work); 5065 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5066 cancel_work_sync(&ifmgd->chswitch_work); 5067 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5068 5069 sdata_lock(sdata); 5070 if (ifmgd->assoc_data) { 5071 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5072 ieee80211_destroy_assoc_data(sdata, false, false); 5073 cfg80211_assoc_timeout(sdata->dev, bss); 5074 } 5075 if (ifmgd->auth_data) 5076 ieee80211_destroy_auth_data(sdata, false); 5077 spin_lock_bh(&ifmgd->teardown_lock); 5078 if (ifmgd->teardown_skb) { 5079 kfree_skb(ifmgd->teardown_skb); 5080 ifmgd->teardown_skb = NULL; 5081 ifmgd->orig_teardown_skb = NULL; 5082 } 5083 spin_unlock_bh(&ifmgd->teardown_lock); 5084 del_timer_sync(&ifmgd->timer); 5085 sdata_unlock(sdata); 5086 } 5087 5088 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5089 enum nl80211_cqm_rssi_threshold_event rssi_event, 5090 s32 rssi_level, 5091 gfp_t gfp) 5092 { 5093 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5094 5095 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5096 5097 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5098 } 5099 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5100 5101 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5102 { 5103 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5104 5105 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5106 5107 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5108 } 5109 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5110