1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2019 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/if_ether.h> 16 #include <linux/skbuff.h> 17 #include <linux/if_arp.h> 18 #include <linux/etherdevice.h> 19 #include <linux/moduleparam.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/crc32.h> 22 #include <linux/slab.h> 23 #include <linux/export.h> 24 #include <net/mac80211.h> 25 #include <asm/unaligned.h> 26 27 #include "ieee80211_i.h" 28 #include "driver-ops.h" 29 #include "rate.h" 30 #include "led.h" 31 #include "fils_aead.h" 32 33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 34 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 35 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 36 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 37 #define IEEE80211_AUTH_MAX_TRIES 3 38 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 40 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 41 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 42 #define IEEE80211_ASSOC_MAX_TRIES 3 43 44 static int max_nullfunc_tries = 2; 45 module_param(max_nullfunc_tries, int, 0644); 46 MODULE_PARM_DESC(max_nullfunc_tries, 47 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 48 49 static int max_probe_tries = 5; 50 module_param(max_probe_tries, int, 0644); 51 MODULE_PARM_DESC(max_probe_tries, 52 "Maximum probe tries before disconnecting (reason 4)."); 53 54 /* 55 * Beacon loss timeout is calculated as N frames times the 56 * advertised beacon interval. This may need to be somewhat 57 * higher than what hardware might detect to account for 58 * delays in the host processing frames. But since we also 59 * probe on beacon miss before declaring the connection lost 60 * default to what we want. 61 */ 62 static int beacon_loss_count = 7; 63 module_param(beacon_loss_count, int, 0644); 64 MODULE_PARM_DESC(beacon_loss_count, 65 "Number of beacon intervals before we decide beacon was lost."); 66 67 /* 68 * Time the connection can be idle before we probe 69 * it to see if we can still talk to the AP. 70 */ 71 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 72 /* 73 * Time we wait for a probe response after sending 74 * a probe request because of beacon loss or for 75 * checking the connection still works. 76 */ 77 static int probe_wait_ms = 500; 78 module_param(probe_wait_ms, int, 0644); 79 MODULE_PARM_DESC(probe_wait_ms, 80 "Maximum time(ms) to wait for probe response" 81 " before disconnecting (reason 4)."); 82 83 /* 84 * How many Beacon frames need to have been used in average signal strength 85 * before starting to indicate signal change events. 86 */ 87 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 88 89 /* 90 * We can have multiple work items (and connection probing) 91 * scheduling this timer, but we need to take care to only 92 * reschedule it when it should fire _earlier_ than it was 93 * asked for before, or if it's not pending right now. This 94 * function ensures that. Note that it then is required to 95 * run this function for all timeouts after the first one 96 * has happened -- the work that runs from this timer will 97 * do that. 98 */ 99 static void run_again(struct ieee80211_sub_if_data *sdata, 100 unsigned long timeout) 101 { 102 sdata_assert_lock(sdata); 103 104 if (!timer_pending(&sdata->u.mgd.timer) || 105 time_before(timeout, sdata->u.mgd.timer.expires)) 106 mod_timer(&sdata->u.mgd.timer, timeout); 107 } 108 109 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 110 { 111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 112 return; 113 114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 115 return; 116 117 mod_timer(&sdata->u.mgd.bcn_mon_timer, 118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 119 } 120 121 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 122 { 123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 124 125 if (unlikely(!ifmgd->associated)) 126 return; 127 128 if (ifmgd->probe_send_count) 129 ifmgd->probe_send_count = 0; 130 131 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 132 return; 133 134 mod_timer(&ifmgd->conn_mon_timer, 135 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 136 } 137 138 static int ecw2cw(int ecw) 139 { 140 return (1 << ecw) - 1; 141 } 142 143 static u32 144 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 145 struct ieee80211_supported_band *sband, 146 struct ieee80211_channel *channel, 147 const struct ieee80211_ht_operation *ht_oper, 148 const struct ieee80211_vht_operation *vht_oper, 149 const struct ieee80211_he_operation *he_oper, 150 struct cfg80211_chan_def *chandef, bool tracking) 151 { 152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 153 struct cfg80211_chan_def vht_chandef; 154 struct ieee80211_sta_ht_cap sta_ht_cap; 155 u32 ht_cfreq, ret; 156 157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 159 160 chandef->chan = channel; 161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 162 chandef->center_freq1 = channel->center_freq; 163 chandef->center_freq2 = 0; 164 165 if (!ht_oper || !sta_ht_cap.ht_supported) { 166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 167 goto out; 168 } 169 170 chandef->width = NL80211_CHAN_WIDTH_20; 171 172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 173 channel->band); 174 /* check that channel matches the right operating channel */ 175 if (!tracking && channel->center_freq != ht_cfreq) { 176 /* 177 * It's possible that some APs are confused here; 178 * Netgear WNDR3700 sometimes reports 4 higher than 179 * the actual channel in association responses, but 180 * since we look at probe response/beacon data here 181 * it should be OK. 182 */ 183 sdata_info(sdata, 184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 185 channel->center_freq, ht_cfreq, 186 ht_oper->primary_chan, channel->band); 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 188 goto out; 189 } 190 191 /* check 40 MHz support, if we have it */ 192 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 193 ieee80211_chandef_ht_oper(ht_oper, chandef); 194 } else { 195 /* 40 MHz (and 80 MHz) must be supported for VHT */ 196 ret = IEEE80211_STA_DISABLE_VHT; 197 /* also mark 40 MHz disabled */ 198 ret |= IEEE80211_STA_DISABLE_40MHZ; 199 goto out; 200 } 201 202 if (!vht_oper || !sband->vht_cap.vht_supported) { 203 ret = IEEE80211_STA_DISABLE_VHT; 204 goto out; 205 } 206 207 vht_chandef = *chandef; 208 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 209 (le32_to_cpu(he_oper->he_oper_params) & 210 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 211 struct ieee80211_vht_operation he_oper_vht_cap; 212 213 /* 214 * Set only first 3 bytes (other 2 aren't used in 215 * ieee80211_chandef_vht_oper() anyway) 216 */ 217 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 218 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 219 220 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 221 &he_oper_vht_cap, ht_oper, 222 &vht_chandef)) { 223 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 224 sdata_info(sdata, 225 "HE AP VHT information is invalid, disable HE\n"); 226 ret = IEEE80211_STA_DISABLE_HE; 227 goto out; 228 } 229 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_oper, 230 ht_oper, &vht_chandef)) { 231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 232 sdata_info(sdata, 233 "AP VHT information is invalid, disable VHT\n"); 234 ret = IEEE80211_STA_DISABLE_VHT; 235 goto out; 236 } 237 238 if (!cfg80211_chandef_valid(&vht_chandef)) { 239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 240 sdata_info(sdata, 241 "AP VHT information is invalid, disable VHT\n"); 242 ret = IEEE80211_STA_DISABLE_VHT; 243 goto out; 244 } 245 246 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 247 ret = 0; 248 goto out; 249 } 250 251 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 252 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 253 sdata_info(sdata, 254 "AP VHT information doesn't match HT, disable VHT\n"); 255 ret = IEEE80211_STA_DISABLE_VHT; 256 goto out; 257 } 258 259 *chandef = vht_chandef; 260 261 ret = 0; 262 263 out: 264 /* 265 * When tracking the current AP, don't do any further checks if the 266 * new chandef is identical to the one we're currently using for the 267 * connection. This keeps us from playing ping-pong with regulatory, 268 * without it the following can happen (for example): 269 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 270 * - AP advertises regdom US 271 * - CRDA loads regdom US with 80 MHz prohibited (old database) 272 * - the code below detects an unsupported channel, downgrades, and 273 * we disconnect from the AP in the caller 274 * - disconnect causes CRDA to reload world regdomain and the game 275 * starts anew. 276 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 277 * 278 * It seems possible that there are still scenarios with CSA or real 279 * bandwidth changes where a this could happen, but those cases are 280 * less common and wouldn't completely prevent using the AP. 281 */ 282 if (tracking && 283 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 284 return ret; 285 286 /* don't print the message below for VHT mismatch if VHT is disabled */ 287 if (ret & IEEE80211_STA_DISABLE_VHT) 288 vht_chandef = *chandef; 289 290 /* 291 * Ignore the DISABLED flag when we're already connected and only 292 * tracking the APs beacon for bandwidth changes - otherwise we 293 * might get disconnected here if we connect to an AP, update our 294 * regulatory information based on the AP's country IE and the 295 * information we have is wrong/outdated and disables the channel 296 * that we're actually using for the connection to the AP. 297 */ 298 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 299 tracking ? 0 : 300 IEEE80211_CHAN_DISABLED)) { 301 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 302 ret = IEEE80211_STA_DISABLE_HT | 303 IEEE80211_STA_DISABLE_VHT; 304 break; 305 } 306 307 ret |= ieee80211_chandef_downgrade(chandef); 308 } 309 310 if (chandef->width != vht_chandef.width && !tracking) 311 sdata_info(sdata, 312 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 313 314 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 315 return ret; 316 } 317 318 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 319 struct sta_info *sta, 320 const struct ieee80211_ht_cap *ht_cap, 321 const struct ieee80211_ht_operation *ht_oper, 322 const struct ieee80211_vht_operation *vht_oper, 323 const struct ieee80211_he_operation *he_oper, 324 const u8 *bssid, u32 *changed) 325 { 326 struct ieee80211_local *local = sdata->local; 327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 328 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 329 struct ieee80211_supported_band *sband = 330 local->hw.wiphy->bands[chan->band]; 331 struct cfg80211_chan_def chandef; 332 u16 ht_opmode; 333 u32 flags; 334 enum ieee80211_sta_rx_bandwidth new_sta_bw; 335 int ret; 336 337 /* if HT was/is disabled, don't track any bandwidth changes */ 338 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 339 return 0; 340 341 /* don't check VHT if we associated as non-VHT station */ 342 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 343 vht_oper = NULL; 344 345 /* don't check HE if we associated as non-HE station */ 346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 347 !ieee80211_get_he_sta_cap(sband)) 348 he_oper = NULL; 349 350 if (WARN_ON_ONCE(!sta)) 351 return -EINVAL; 352 353 /* 354 * if bss configuration changed store the new one - 355 * this may be applicable even if channel is identical 356 */ 357 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 358 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 359 *changed |= BSS_CHANGED_HT; 360 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 361 } 362 363 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 364 flags = ieee80211_determine_chantype(sdata, sband, chan, 365 ht_oper, vht_oper, he_oper, 366 &chandef, true); 367 368 /* 369 * Downgrade the new channel if we associated with restricted 370 * capabilities. For example, if we associated as a 20 MHz STA 371 * to a 40 MHz AP (due to regulatory, capabilities or config 372 * reasons) then switching to a 40 MHz channel now won't do us 373 * any good -- we couldn't use it with the AP. 374 */ 375 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 376 chandef.width == NL80211_CHAN_WIDTH_80P80) 377 flags |= ieee80211_chandef_downgrade(&chandef); 378 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 379 chandef.width == NL80211_CHAN_WIDTH_160) 380 flags |= ieee80211_chandef_downgrade(&chandef); 381 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 382 chandef.width > NL80211_CHAN_WIDTH_20) 383 flags |= ieee80211_chandef_downgrade(&chandef); 384 385 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 386 return 0; 387 388 sdata_info(sdata, 389 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 390 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 391 chandef.center_freq1, chandef.center_freq2); 392 393 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 394 IEEE80211_STA_DISABLE_VHT | 395 IEEE80211_STA_DISABLE_40MHZ | 396 IEEE80211_STA_DISABLE_80P80MHZ | 397 IEEE80211_STA_DISABLE_160MHZ)) || 398 !cfg80211_chandef_valid(&chandef)) { 399 sdata_info(sdata, 400 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 401 ifmgd->bssid); 402 return -EINVAL; 403 } 404 405 switch (chandef.width) { 406 case NL80211_CHAN_WIDTH_20_NOHT: 407 case NL80211_CHAN_WIDTH_20: 408 new_sta_bw = IEEE80211_STA_RX_BW_20; 409 break; 410 case NL80211_CHAN_WIDTH_40: 411 new_sta_bw = IEEE80211_STA_RX_BW_40; 412 break; 413 case NL80211_CHAN_WIDTH_80: 414 new_sta_bw = IEEE80211_STA_RX_BW_80; 415 break; 416 case NL80211_CHAN_WIDTH_80P80: 417 case NL80211_CHAN_WIDTH_160: 418 new_sta_bw = IEEE80211_STA_RX_BW_160; 419 break; 420 default: 421 return -EINVAL; 422 } 423 424 if (new_sta_bw > sta->cur_max_bandwidth) 425 new_sta_bw = sta->cur_max_bandwidth; 426 427 if (new_sta_bw < sta->sta.bandwidth) { 428 sta->sta.bandwidth = new_sta_bw; 429 rate_control_rate_update(local, sband, sta, 430 IEEE80211_RC_BW_CHANGED); 431 } 432 433 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 434 if (ret) { 435 sdata_info(sdata, 436 "AP %pM changed bandwidth to incompatible one - disconnect\n", 437 ifmgd->bssid); 438 return ret; 439 } 440 441 if (new_sta_bw > sta->sta.bandwidth) { 442 sta->sta.bandwidth = new_sta_bw; 443 rate_control_rate_update(local, sband, sta, 444 IEEE80211_RC_BW_CHANGED); 445 } 446 447 return 0; 448 } 449 450 /* frame sending functions */ 451 452 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 453 struct sk_buff *skb, u8 ap_ht_param, 454 struct ieee80211_supported_band *sband, 455 struct ieee80211_channel *channel, 456 enum ieee80211_smps_mode smps) 457 { 458 u8 *pos; 459 u32 flags = channel->flags; 460 u16 cap; 461 struct ieee80211_sta_ht_cap ht_cap; 462 463 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 464 465 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 466 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 467 468 /* determine capability flags */ 469 cap = ht_cap.cap; 470 471 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 472 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 473 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 475 cap &= ~IEEE80211_HT_CAP_SGI_40; 476 } 477 break; 478 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 479 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 480 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 481 cap &= ~IEEE80211_HT_CAP_SGI_40; 482 } 483 break; 484 } 485 486 /* 487 * If 40 MHz was disabled associate as though we weren't 488 * capable of 40 MHz -- some broken APs will never fall 489 * back to trying to transmit in 20 MHz. 490 */ 491 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 492 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 493 cap &= ~IEEE80211_HT_CAP_SGI_40; 494 } 495 496 /* set SM PS mode properly */ 497 cap &= ~IEEE80211_HT_CAP_SM_PS; 498 switch (smps) { 499 case IEEE80211_SMPS_AUTOMATIC: 500 case IEEE80211_SMPS_NUM_MODES: 501 WARN_ON(1); 502 /* fall through */ 503 case IEEE80211_SMPS_OFF: 504 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 505 IEEE80211_HT_CAP_SM_PS_SHIFT; 506 break; 507 case IEEE80211_SMPS_STATIC: 508 cap |= WLAN_HT_CAP_SM_PS_STATIC << 509 IEEE80211_HT_CAP_SM_PS_SHIFT; 510 break; 511 case IEEE80211_SMPS_DYNAMIC: 512 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 513 IEEE80211_HT_CAP_SM_PS_SHIFT; 514 break; 515 } 516 517 /* reserve and fill IE */ 518 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 519 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 520 } 521 522 /* This function determines vht capability flags for the association 523 * and builds the IE. 524 * Note - the function may set the owner of the MU-MIMO capability 525 */ 526 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 527 struct sk_buff *skb, 528 struct ieee80211_supported_band *sband, 529 struct ieee80211_vht_cap *ap_vht_cap) 530 { 531 struct ieee80211_local *local = sdata->local; 532 u8 *pos; 533 u32 cap; 534 struct ieee80211_sta_vht_cap vht_cap; 535 u32 mask, ap_bf_sts, our_bf_sts; 536 537 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 538 539 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 540 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 541 542 /* determine capability flags */ 543 cap = vht_cap.cap; 544 545 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 546 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 547 548 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 549 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 550 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 551 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 552 } 553 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 555 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 556 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 557 } 558 559 /* 560 * Some APs apparently get confused if our capabilities are better 561 * than theirs, so restrict what we advertise in the assoc request. 562 */ 563 if (!(ap_vht_cap->vht_cap_info & 564 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 565 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 566 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 567 else if (!(ap_vht_cap->vht_cap_info & 568 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 569 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 570 571 /* 572 * If some other vif is using the MU-MIMO capablity we cannot associate 573 * using MU-MIMO - this will lead to contradictions in the group-id 574 * mechanism. 575 * Ownership is defined since association request, in order to avoid 576 * simultaneous associations with MU-MIMO. 577 */ 578 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 579 bool disable_mu_mimo = false; 580 struct ieee80211_sub_if_data *other; 581 582 list_for_each_entry_rcu(other, &local->interfaces, list) { 583 if (other->vif.mu_mimo_owner) { 584 disable_mu_mimo = true; 585 break; 586 } 587 } 588 if (disable_mu_mimo) 589 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 590 else 591 sdata->vif.mu_mimo_owner = true; 592 } 593 594 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 595 596 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 597 our_bf_sts = cap & mask; 598 599 if (ap_bf_sts < our_bf_sts) { 600 cap &= ~mask; 601 cap |= ap_bf_sts; 602 } 603 604 /* reserve and fill IE */ 605 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 606 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 607 } 608 609 /* This function determines HE capability flags for the association 610 * and builds the IE. 611 */ 612 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 613 struct sk_buff *skb, 614 struct ieee80211_supported_band *sband) 615 { 616 u8 *pos; 617 const struct ieee80211_sta_he_cap *he_cap = NULL; 618 u8 he_cap_size; 619 620 he_cap = ieee80211_get_he_sta_cap(sband); 621 if (!he_cap) 622 return; 623 624 /* 625 * TODO: the 1 added is because this temporarily is under the EXTENSION 626 * IE. Get rid of it when it moves. 627 */ 628 he_cap_size = 629 2 + 1 + sizeof(he_cap->he_cap_elem) + 630 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 631 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 632 he_cap->he_cap_elem.phy_cap_info); 633 pos = skb_put(skb, he_cap_size); 634 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 635 } 636 637 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 638 { 639 struct ieee80211_local *local = sdata->local; 640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 641 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 642 struct sk_buff *skb; 643 struct ieee80211_mgmt *mgmt; 644 u8 *pos, qos_info, *ie_start; 645 size_t offset = 0, noffset; 646 int i, count, rates_len, supp_rates_len, shift; 647 u16 capab; 648 struct ieee80211_supported_band *sband; 649 struct ieee80211_chanctx_conf *chanctx_conf; 650 struct ieee80211_channel *chan; 651 u32 rates = 0; 652 653 sdata_assert_lock(sdata); 654 655 rcu_read_lock(); 656 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 657 if (WARN_ON(!chanctx_conf)) { 658 rcu_read_unlock(); 659 return; 660 } 661 chan = chanctx_conf->def.chan; 662 rcu_read_unlock(); 663 sband = local->hw.wiphy->bands[chan->band]; 664 shift = ieee80211_vif_get_shift(&sdata->vif); 665 666 if (assoc_data->supp_rates_len) { 667 /* 668 * Get all rates supported by the device and the AP as 669 * some APs don't like getting a superset of their rates 670 * in the association request (e.g. D-Link DAP 1353 in 671 * b-only mode)... 672 */ 673 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 674 assoc_data->supp_rates, 675 assoc_data->supp_rates_len, 676 &rates); 677 } else { 678 /* 679 * In case AP not provide any supported rates information 680 * before association, we send information element(s) with 681 * all rates that we support. 682 */ 683 rates_len = 0; 684 for (i = 0; i < sband->n_bitrates; i++) { 685 rates |= BIT(i); 686 rates_len++; 687 } 688 } 689 690 skb = alloc_skb(local->hw.extra_tx_headroom + 691 sizeof(*mgmt) + /* bit too much but doesn't matter */ 692 2 + assoc_data->ssid_len + /* SSID */ 693 4 + rates_len + /* (extended) rates */ 694 4 + /* power capability */ 695 2 + 2 * sband->n_channels + /* supported channels */ 696 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 697 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 698 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 699 sizeof(struct ieee80211_he_mcs_nss_supp) + 700 IEEE80211_HE_PPE_THRES_MAX_LEN + 701 assoc_data->ie_len + /* extra IEs */ 702 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 703 9, /* WMM */ 704 GFP_KERNEL); 705 if (!skb) 706 return; 707 708 skb_reserve(skb, local->hw.extra_tx_headroom); 709 710 capab = WLAN_CAPABILITY_ESS; 711 712 if (sband->band == NL80211_BAND_2GHZ) { 713 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 714 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 715 } 716 717 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 718 capab |= WLAN_CAPABILITY_PRIVACY; 719 720 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 721 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 722 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 723 724 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 725 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 726 727 mgmt = skb_put_zero(skb, 24); 728 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 729 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 730 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 731 732 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 733 skb_put(skb, 10); 734 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 735 IEEE80211_STYPE_REASSOC_REQ); 736 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 737 mgmt->u.reassoc_req.listen_interval = 738 cpu_to_le16(local->hw.conf.listen_interval); 739 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 740 ETH_ALEN); 741 } else { 742 skb_put(skb, 4); 743 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 744 IEEE80211_STYPE_ASSOC_REQ); 745 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 746 mgmt->u.assoc_req.listen_interval = 747 cpu_to_le16(local->hw.conf.listen_interval); 748 } 749 750 /* SSID */ 751 pos = skb_put(skb, 2 + assoc_data->ssid_len); 752 ie_start = pos; 753 *pos++ = WLAN_EID_SSID; 754 *pos++ = assoc_data->ssid_len; 755 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 756 757 /* add all rates which were marked to be used above */ 758 supp_rates_len = rates_len; 759 if (supp_rates_len > 8) 760 supp_rates_len = 8; 761 762 pos = skb_put(skb, supp_rates_len + 2); 763 *pos++ = WLAN_EID_SUPP_RATES; 764 *pos++ = supp_rates_len; 765 766 count = 0; 767 for (i = 0; i < sband->n_bitrates; i++) { 768 if (BIT(i) & rates) { 769 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 770 5 * (1 << shift)); 771 *pos++ = (u8) rate; 772 if (++count == 8) 773 break; 774 } 775 } 776 777 if (rates_len > count) { 778 pos = skb_put(skb, rates_len - count + 2); 779 *pos++ = WLAN_EID_EXT_SUPP_RATES; 780 *pos++ = rates_len - count; 781 782 for (i++; i < sband->n_bitrates; i++) { 783 if (BIT(i) & rates) { 784 int rate; 785 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 786 5 * (1 << shift)); 787 *pos++ = (u8) rate; 788 } 789 } 790 } 791 792 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 793 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 794 pos = skb_put(skb, 4); 795 *pos++ = WLAN_EID_PWR_CAPABILITY; 796 *pos++ = 2; 797 *pos++ = 0; /* min tx power */ 798 /* max tx power */ 799 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 800 } 801 802 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 803 /* TODO: get this in reg domain format */ 804 pos = skb_put(skb, 2 * sband->n_channels + 2); 805 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 806 *pos++ = 2 * sband->n_channels; 807 for (i = 0; i < sband->n_channels; i++) { 808 *pos++ = ieee80211_frequency_to_channel( 809 sband->channels[i].center_freq); 810 *pos++ = 1; /* one channel in the subband*/ 811 } 812 } 813 814 /* Set MBSSID support for HE AP if needed */ 815 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 816 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len) { 817 struct element *elem; 818 819 /* we know it's writable, cast away the const */ 820 elem = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 821 assoc_data->ie, 822 assoc_data->ie_len); 823 824 /* We can probably assume both always true */ 825 if (elem && elem->datalen >= 3) 826 elem->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 827 } 828 829 /* if present, add any custom IEs that go before HT */ 830 if (assoc_data->ie_len) { 831 static const u8 before_ht[] = { 832 WLAN_EID_SSID, 833 WLAN_EID_SUPP_RATES, 834 WLAN_EID_EXT_SUPP_RATES, 835 WLAN_EID_PWR_CAPABILITY, 836 WLAN_EID_SUPPORTED_CHANNELS, 837 WLAN_EID_RSN, 838 WLAN_EID_QOS_CAPA, 839 WLAN_EID_RRM_ENABLED_CAPABILITIES, 840 WLAN_EID_MOBILITY_DOMAIN, 841 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 842 WLAN_EID_RIC_DATA, /* reassoc only */ 843 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 844 }; 845 static const u8 after_ric[] = { 846 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 847 WLAN_EID_HT_CAPABILITY, 848 WLAN_EID_BSS_COEX_2040, 849 /* luckily this is almost always there */ 850 WLAN_EID_EXT_CAPABILITY, 851 WLAN_EID_QOS_TRAFFIC_CAPA, 852 WLAN_EID_TIM_BCAST_REQ, 853 WLAN_EID_INTERWORKING, 854 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 855 WLAN_EID_VHT_CAPABILITY, 856 WLAN_EID_OPMODE_NOTIF, 857 }; 858 859 noffset = ieee80211_ie_split_ric(assoc_data->ie, 860 assoc_data->ie_len, 861 before_ht, 862 ARRAY_SIZE(before_ht), 863 after_ric, 864 ARRAY_SIZE(after_ric), 865 offset); 866 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 867 offset = noffset; 868 } 869 870 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 871 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 872 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 873 874 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 875 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 876 sband, chan, sdata->smps_mode); 877 878 /* if present, add any custom IEs that go before VHT */ 879 if (assoc_data->ie_len) { 880 static const u8 before_vht[] = { 881 /* 882 * no need to list the ones split off before HT 883 * or generated here 884 */ 885 WLAN_EID_BSS_COEX_2040, 886 WLAN_EID_EXT_CAPABILITY, 887 WLAN_EID_QOS_TRAFFIC_CAPA, 888 WLAN_EID_TIM_BCAST_REQ, 889 WLAN_EID_INTERWORKING, 890 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 891 }; 892 893 /* RIC already taken above, so no need to handle here anymore */ 894 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 895 before_vht, ARRAY_SIZE(before_vht), 896 offset); 897 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 898 offset = noffset; 899 } 900 901 /* if present, add any custom IEs that go before HE */ 902 if (assoc_data->ie_len) { 903 static const u8 before_he[] = { 904 /* 905 * no need to list the ones split off before VHT 906 * or generated here 907 */ 908 WLAN_EID_OPMODE_NOTIF, 909 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 910 /* 11ai elements */ 911 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 912 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 913 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 914 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 915 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 916 /* TODO: add 11ah/11aj/11ak elements */ 917 }; 918 919 /* RIC already taken above, so no need to handle here anymore */ 920 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 921 before_he, ARRAY_SIZE(before_he), 922 offset); 923 pos = skb_put(skb, noffset - offset); 924 memcpy(pos, assoc_data->ie + offset, noffset - offset); 925 offset = noffset; 926 } 927 928 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 929 ieee80211_add_vht_ie(sdata, skb, sband, 930 &assoc_data->ap_vht_cap); 931 932 /* 933 * If AP doesn't support HT, mark HE as disabled. 934 * If on the 5GHz band, make sure it supports VHT. 935 */ 936 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 937 (sband->band == NL80211_BAND_5GHZ && 938 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 939 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 940 941 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 942 ieee80211_add_he_ie(sdata, skb, sband); 943 944 /* if present, add any custom non-vendor IEs that go after HE */ 945 if (assoc_data->ie_len) { 946 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 947 assoc_data->ie_len, 948 offset); 949 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 950 offset = noffset; 951 } 952 953 if (assoc_data->wmm) { 954 if (assoc_data->uapsd) { 955 qos_info = ifmgd->uapsd_queues; 956 qos_info |= (ifmgd->uapsd_max_sp_len << 957 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 958 } else { 959 qos_info = 0; 960 } 961 962 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 963 } 964 965 /* add any remaining custom (i.e. vendor specific here) IEs */ 966 if (assoc_data->ie_len) { 967 noffset = assoc_data->ie_len; 968 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 969 } 970 971 if (assoc_data->fils_kek_len && 972 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 973 dev_kfree_skb(skb); 974 return; 975 } 976 977 pos = skb_tail_pointer(skb); 978 kfree(ifmgd->assoc_req_ies); 979 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 980 ifmgd->assoc_req_ies_len = pos - ie_start; 981 982 drv_mgd_prepare_tx(local, sdata, 0); 983 984 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 985 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 986 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 987 IEEE80211_TX_INTFL_MLME_CONN_TX; 988 ieee80211_tx_skb(sdata, skb); 989 } 990 991 void ieee80211_send_pspoll(struct ieee80211_local *local, 992 struct ieee80211_sub_if_data *sdata) 993 { 994 struct ieee80211_pspoll *pspoll; 995 struct sk_buff *skb; 996 997 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 998 if (!skb) 999 return; 1000 1001 pspoll = (struct ieee80211_pspoll *) skb->data; 1002 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1003 1004 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1005 ieee80211_tx_skb(sdata, skb); 1006 } 1007 1008 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1009 struct ieee80211_sub_if_data *sdata, 1010 bool powersave) 1011 { 1012 struct sk_buff *skb; 1013 struct ieee80211_hdr_3addr *nullfunc; 1014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1015 1016 /* Don't send NDPs when STA is connected HE */ 1017 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1018 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1019 return; 1020 1021 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1022 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1023 if (!skb) 1024 return; 1025 1026 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1027 if (powersave) 1028 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1029 1030 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1031 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1032 1033 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1034 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1035 1036 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1038 1039 ieee80211_tx_skb(sdata, skb); 1040 } 1041 1042 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1043 struct ieee80211_sub_if_data *sdata) 1044 { 1045 struct sk_buff *skb; 1046 struct ieee80211_hdr *nullfunc; 1047 __le16 fc; 1048 1049 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1050 return; 1051 1052 /* Don't send NDPs when connected HE */ 1053 if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE)) 1054 return; 1055 1056 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1057 if (!skb) 1058 return; 1059 1060 skb_reserve(skb, local->hw.extra_tx_headroom); 1061 1062 nullfunc = skb_put_zero(skb, 30); 1063 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1064 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1065 nullfunc->frame_control = fc; 1066 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1067 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1068 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1069 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1070 1071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1072 ieee80211_tx_skb(sdata, skb); 1073 } 1074 1075 /* spectrum management related things */ 1076 static void ieee80211_chswitch_work(struct work_struct *work) 1077 { 1078 struct ieee80211_sub_if_data *sdata = 1079 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1080 struct ieee80211_local *local = sdata->local; 1081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1082 int ret; 1083 1084 if (!ieee80211_sdata_running(sdata)) 1085 return; 1086 1087 sdata_lock(sdata); 1088 mutex_lock(&local->mtx); 1089 mutex_lock(&local->chanctx_mtx); 1090 1091 if (!ifmgd->associated) 1092 goto out; 1093 1094 if (!sdata->vif.csa_active) 1095 goto out; 1096 1097 /* 1098 * using reservation isn't immediate as it may be deferred until later 1099 * with multi-vif. once reservation is complete it will re-schedule the 1100 * work with no reserved_chanctx so verify chandef to check if it 1101 * completed successfully 1102 */ 1103 1104 if (sdata->reserved_chanctx) { 1105 struct ieee80211_supported_band *sband = NULL; 1106 struct sta_info *mgd_sta = NULL; 1107 enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20; 1108 1109 /* 1110 * with multi-vif csa driver may call ieee80211_csa_finish() 1111 * many times while waiting for other interfaces to use their 1112 * reservations 1113 */ 1114 if (sdata->reserved_ready) 1115 goto out; 1116 1117 if (sdata->vif.bss_conf.chandef.width != 1118 sdata->csa_chandef.width) { 1119 /* 1120 * For managed interface, we need to also update the AP 1121 * station bandwidth and align the rate scale algorithm 1122 * on the bandwidth change. Here we only consider the 1123 * bandwidth of the new channel definition (as channel 1124 * switch flow does not have the full HT/VHT/HE 1125 * information), assuming that if additional changes are 1126 * required they would be done as part of the processing 1127 * of the next beacon from the AP. 1128 */ 1129 switch (sdata->csa_chandef.width) { 1130 case NL80211_CHAN_WIDTH_20_NOHT: 1131 case NL80211_CHAN_WIDTH_20: 1132 default: 1133 bw = IEEE80211_STA_RX_BW_20; 1134 break; 1135 case NL80211_CHAN_WIDTH_40: 1136 bw = IEEE80211_STA_RX_BW_40; 1137 break; 1138 case NL80211_CHAN_WIDTH_80: 1139 bw = IEEE80211_STA_RX_BW_80; 1140 break; 1141 case NL80211_CHAN_WIDTH_80P80: 1142 case NL80211_CHAN_WIDTH_160: 1143 bw = IEEE80211_STA_RX_BW_160; 1144 break; 1145 } 1146 1147 mgd_sta = sta_info_get(sdata, ifmgd->bssid); 1148 sband = 1149 local->hw.wiphy->bands[sdata->csa_chandef.chan->band]; 1150 } 1151 1152 if (sdata->vif.bss_conf.chandef.width > 1153 sdata->csa_chandef.width) { 1154 mgd_sta->sta.bandwidth = bw; 1155 rate_control_rate_update(local, sband, mgd_sta, 1156 IEEE80211_RC_BW_CHANGED); 1157 } 1158 1159 ret = ieee80211_vif_use_reserved_context(sdata); 1160 if (ret) { 1161 sdata_info(sdata, 1162 "failed to use reserved channel context, disconnecting (err=%d)\n", 1163 ret); 1164 ieee80211_queue_work(&sdata->local->hw, 1165 &ifmgd->csa_connection_drop_work); 1166 goto out; 1167 } 1168 1169 if (sdata->vif.bss_conf.chandef.width < 1170 sdata->csa_chandef.width) { 1171 mgd_sta->sta.bandwidth = bw; 1172 rate_control_rate_update(local, sband, mgd_sta, 1173 IEEE80211_RC_BW_CHANGED); 1174 } 1175 1176 goto out; 1177 } 1178 1179 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1180 &sdata->csa_chandef)) { 1181 sdata_info(sdata, 1182 "failed to finalize channel switch, disconnecting\n"); 1183 ieee80211_queue_work(&sdata->local->hw, 1184 &ifmgd->csa_connection_drop_work); 1185 goto out; 1186 } 1187 1188 ifmgd->csa_waiting_bcn = true; 1189 1190 ieee80211_sta_reset_beacon_monitor(sdata); 1191 ieee80211_sta_reset_conn_monitor(sdata); 1192 1193 out: 1194 mutex_unlock(&local->chanctx_mtx); 1195 mutex_unlock(&local->mtx); 1196 sdata_unlock(sdata); 1197 } 1198 1199 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1200 { 1201 struct ieee80211_local *local = sdata->local; 1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1203 int ret; 1204 1205 sdata_assert_lock(sdata); 1206 1207 WARN_ON(!sdata->vif.csa_active); 1208 1209 if (sdata->csa_block_tx) { 1210 ieee80211_wake_vif_queues(local, sdata, 1211 IEEE80211_QUEUE_STOP_REASON_CSA); 1212 sdata->csa_block_tx = false; 1213 } 1214 1215 sdata->vif.csa_active = false; 1216 ifmgd->csa_waiting_bcn = false; 1217 1218 ret = drv_post_channel_switch(sdata); 1219 if (ret) { 1220 sdata_info(sdata, 1221 "driver post channel switch failed, disconnecting\n"); 1222 ieee80211_queue_work(&local->hw, 1223 &ifmgd->csa_connection_drop_work); 1224 return; 1225 } 1226 1227 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1228 } 1229 1230 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1231 { 1232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1234 1235 trace_api_chswitch_done(sdata, success); 1236 if (!success) { 1237 sdata_info(sdata, 1238 "driver channel switch failed, disconnecting\n"); 1239 ieee80211_queue_work(&sdata->local->hw, 1240 &ifmgd->csa_connection_drop_work); 1241 } else { 1242 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1243 } 1244 } 1245 EXPORT_SYMBOL(ieee80211_chswitch_done); 1246 1247 static void ieee80211_chswitch_timer(struct timer_list *t) 1248 { 1249 struct ieee80211_sub_if_data *sdata = 1250 from_timer(sdata, t, u.mgd.chswitch_timer); 1251 1252 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1253 } 1254 1255 static void 1256 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1257 { 1258 struct ieee80211_local *local = sdata->local; 1259 1260 if (!local->ops->abort_channel_switch) 1261 return; 1262 1263 mutex_lock(&local->mtx); 1264 1265 mutex_lock(&local->chanctx_mtx); 1266 ieee80211_vif_unreserve_chanctx(sdata); 1267 mutex_unlock(&local->chanctx_mtx); 1268 1269 if (sdata->csa_block_tx) 1270 ieee80211_wake_vif_queues(local, sdata, 1271 IEEE80211_QUEUE_STOP_REASON_CSA); 1272 1273 sdata->csa_block_tx = false; 1274 sdata->vif.csa_active = false; 1275 1276 mutex_unlock(&local->mtx); 1277 1278 drv_abort_channel_switch(sdata); 1279 } 1280 1281 static void 1282 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1283 u64 timestamp, u32 device_timestamp, 1284 struct ieee802_11_elems *elems, 1285 bool beacon) 1286 { 1287 struct ieee80211_local *local = sdata->local; 1288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1289 struct cfg80211_bss *cbss = ifmgd->associated; 1290 struct ieee80211_chanctx_conf *conf; 1291 struct ieee80211_chanctx *chanctx; 1292 enum nl80211_band current_band; 1293 struct ieee80211_csa_ie csa_ie; 1294 struct ieee80211_channel_switch ch_switch; 1295 int res; 1296 1297 sdata_assert_lock(sdata); 1298 1299 if (!cbss) 1300 return; 1301 1302 if (local->scanning) 1303 return; 1304 1305 current_band = cbss->channel->band; 1306 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1307 ifmgd->flags, 1308 ifmgd->associated->bssid, &csa_ie); 1309 1310 if (!res) { 1311 ch_switch.timestamp = timestamp; 1312 ch_switch.device_timestamp = device_timestamp; 1313 ch_switch.block_tx = beacon ? csa_ie.mode : 0; 1314 ch_switch.chandef = csa_ie.chandef; 1315 ch_switch.count = csa_ie.count; 1316 ch_switch.delay = csa_ie.max_switch_time; 1317 } 1318 1319 if (res < 0) { 1320 ieee80211_queue_work(&local->hw, 1321 &ifmgd->csa_connection_drop_work); 1322 return; 1323 } 1324 1325 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1326 if (res) 1327 ieee80211_sta_abort_chanswitch(sdata); 1328 else 1329 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1330 return; 1331 } else if (sdata->vif.csa_active || res) { 1332 /* disregard subsequent announcements if already processing */ 1333 return; 1334 } 1335 1336 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1337 IEEE80211_CHAN_DISABLED)) { 1338 sdata_info(sdata, 1339 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1340 ifmgd->associated->bssid, 1341 csa_ie.chandef.chan->center_freq, 1342 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1343 csa_ie.chandef.center_freq2); 1344 ieee80211_queue_work(&local->hw, 1345 &ifmgd->csa_connection_drop_work); 1346 return; 1347 } 1348 1349 if (cfg80211_chandef_identical(&csa_ie.chandef, 1350 &sdata->vif.bss_conf.chandef) && 1351 (!csa_ie.mode || !beacon)) { 1352 if (ifmgd->csa_ignored_same_chan) 1353 return; 1354 sdata_info(sdata, 1355 "AP %pM tries to chanswitch to same channel, ignore\n", 1356 ifmgd->associated->bssid); 1357 ifmgd->csa_ignored_same_chan = true; 1358 return; 1359 } 1360 1361 /* 1362 * Drop all TDLS peers - either we disconnect or move to a different 1363 * channel from this point on. There's no telling what our peer will do. 1364 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1365 * have an incompatible wider chandef. 1366 */ 1367 ieee80211_teardown_tdls_peers(sdata); 1368 1369 mutex_lock(&local->mtx); 1370 mutex_lock(&local->chanctx_mtx); 1371 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1372 lockdep_is_held(&local->chanctx_mtx)); 1373 if (!conf) { 1374 sdata_info(sdata, 1375 "no channel context assigned to vif?, disconnecting\n"); 1376 goto drop_connection; 1377 } 1378 1379 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1380 1381 if (local->use_chanctx && 1382 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1383 sdata_info(sdata, 1384 "driver doesn't support chan-switch with channel contexts\n"); 1385 goto drop_connection; 1386 } 1387 1388 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1389 sdata_info(sdata, 1390 "preparing for channel switch failed, disconnecting\n"); 1391 goto drop_connection; 1392 } 1393 1394 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1395 chanctx->mode, false); 1396 if (res) { 1397 sdata_info(sdata, 1398 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1399 res); 1400 goto drop_connection; 1401 } 1402 mutex_unlock(&local->chanctx_mtx); 1403 1404 sdata->vif.csa_active = true; 1405 sdata->csa_chandef = csa_ie.chandef; 1406 sdata->csa_block_tx = ch_switch.block_tx; 1407 ifmgd->csa_ignored_same_chan = false; 1408 1409 if (sdata->csa_block_tx) 1410 ieee80211_stop_vif_queues(local, sdata, 1411 IEEE80211_QUEUE_STOP_REASON_CSA); 1412 mutex_unlock(&local->mtx); 1413 1414 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1415 csa_ie.count); 1416 1417 if (local->ops->channel_switch) { 1418 /* use driver's channel switch callback */ 1419 drv_channel_switch(local, sdata, &ch_switch); 1420 return; 1421 } 1422 1423 /* channel switch handled in software */ 1424 if (csa_ie.count <= 1) 1425 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1426 else 1427 mod_timer(&ifmgd->chswitch_timer, 1428 TU_TO_EXP_TIME((csa_ie.count - 1) * 1429 cbss->beacon_interval)); 1430 return; 1431 drop_connection: 1432 /* 1433 * This is just so that the disconnect flow will know that 1434 * we were trying to switch channel and failed. In case the 1435 * mode is 1 (we are not allowed to Tx), we will know not to 1436 * send a deauthentication frame. Those two fields will be 1437 * reset when the disconnection worker runs. 1438 */ 1439 sdata->vif.csa_active = true; 1440 sdata->csa_block_tx = ch_switch.block_tx; 1441 1442 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1443 mutex_unlock(&local->chanctx_mtx); 1444 mutex_unlock(&local->mtx); 1445 } 1446 1447 static bool 1448 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1449 struct ieee80211_channel *channel, 1450 const u8 *country_ie, u8 country_ie_len, 1451 const u8 *pwr_constr_elem, 1452 int *chan_pwr, int *pwr_reduction) 1453 { 1454 struct ieee80211_country_ie_triplet *triplet; 1455 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1456 int i, chan_increment; 1457 bool have_chan_pwr = false; 1458 1459 /* Invalid IE */ 1460 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1461 return false; 1462 1463 triplet = (void *)(country_ie + 3); 1464 country_ie_len -= 3; 1465 1466 switch (channel->band) { 1467 default: 1468 WARN_ON_ONCE(1); 1469 /* fall through */ 1470 case NL80211_BAND_2GHZ: 1471 case NL80211_BAND_60GHZ: 1472 chan_increment = 1; 1473 break; 1474 case NL80211_BAND_5GHZ: 1475 chan_increment = 4; 1476 break; 1477 } 1478 1479 /* find channel */ 1480 while (country_ie_len >= 3) { 1481 u8 first_channel = triplet->chans.first_channel; 1482 1483 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1484 goto next; 1485 1486 for (i = 0; i < triplet->chans.num_channels; i++) { 1487 if (first_channel + i * chan_increment == chan) { 1488 have_chan_pwr = true; 1489 *chan_pwr = triplet->chans.max_power; 1490 break; 1491 } 1492 } 1493 if (have_chan_pwr) 1494 break; 1495 1496 next: 1497 triplet++; 1498 country_ie_len -= 3; 1499 } 1500 1501 if (have_chan_pwr && pwr_constr_elem) 1502 *pwr_reduction = *pwr_constr_elem; 1503 else 1504 *pwr_reduction = 0; 1505 1506 return have_chan_pwr; 1507 } 1508 1509 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1510 struct ieee80211_channel *channel, 1511 const u8 *cisco_dtpc_ie, 1512 int *pwr_level) 1513 { 1514 /* From practical testing, the first data byte of the DTPC element 1515 * seems to contain the requested dBm level, and the CLI on Cisco 1516 * APs clearly state the range is -127 to 127 dBm, which indicates 1517 * a signed byte, although it seemingly never actually goes negative. 1518 * The other byte seems to always be zero. 1519 */ 1520 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1521 } 1522 1523 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1524 struct ieee80211_channel *channel, 1525 struct ieee80211_mgmt *mgmt, 1526 const u8 *country_ie, u8 country_ie_len, 1527 const u8 *pwr_constr_ie, 1528 const u8 *cisco_dtpc_ie) 1529 { 1530 bool has_80211h_pwr = false, has_cisco_pwr = false; 1531 int chan_pwr = 0, pwr_reduction_80211h = 0; 1532 int pwr_level_cisco, pwr_level_80211h; 1533 int new_ap_level; 1534 __le16 capab = mgmt->u.probe_resp.capab_info; 1535 1536 if (country_ie && 1537 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1538 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1539 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1540 sdata, channel, country_ie, country_ie_len, 1541 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1542 pwr_level_80211h = 1543 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1544 } 1545 1546 if (cisco_dtpc_ie) { 1547 ieee80211_find_cisco_dtpc( 1548 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1549 has_cisco_pwr = true; 1550 } 1551 1552 if (!has_80211h_pwr && !has_cisco_pwr) 1553 return 0; 1554 1555 /* If we have both 802.11h and Cisco DTPC, apply both limits 1556 * by picking the smallest of the two power levels advertised. 1557 */ 1558 if (has_80211h_pwr && 1559 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1560 new_ap_level = pwr_level_80211h; 1561 1562 if (sdata->ap_power_level == new_ap_level) 1563 return 0; 1564 1565 sdata_dbg(sdata, 1566 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1567 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1568 sdata->u.mgd.bssid); 1569 } else { /* has_cisco_pwr is always true here. */ 1570 new_ap_level = pwr_level_cisco; 1571 1572 if (sdata->ap_power_level == new_ap_level) 1573 return 0; 1574 1575 sdata_dbg(sdata, 1576 "Limiting TX power to %d dBm as advertised by %pM\n", 1577 pwr_level_cisco, sdata->u.mgd.bssid); 1578 } 1579 1580 sdata->ap_power_level = new_ap_level; 1581 if (__ieee80211_recalc_txpower(sdata)) 1582 return BSS_CHANGED_TXPOWER; 1583 return 0; 1584 } 1585 1586 /* powersave */ 1587 static void ieee80211_enable_ps(struct ieee80211_local *local, 1588 struct ieee80211_sub_if_data *sdata) 1589 { 1590 struct ieee80211_conf *conf = &local->hw.conf; 1591 1592 /* 1593 * If we are scanning right now then the parameters will 1594 * take effect when scan finishes. 1595 */ 1596 if (local->scanning) 1597 return; 1598 1599 if (conf->dynamic_ps_timeout > 0 && 1600 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1601 mod_timer(&local->dynamic_ps_timer, jiffies + 1602 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1603 } else { 1604 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1605 ieee80211_send_nullfunc(local, sdata, true); 1606 1607 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1608 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1609 return; 1610 1611 conf->flags |= IEEE80211_CONF_PS; 1612 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1613 } 1614 } 1615 1616 static void ieee80211_change_ps(struct ieee80211_local *local) 1617 { 1618 struct ieee80211_conf *conf = &local->hw.conf; 1619 1620 if (local->ps_sdata) { 1621 ieee80211_enable_ps(local, local->ps_sdata); 1622 } else if (conf->flags & IEEE80211_CONF_PS) { 1623 conf->flags &= ~IEEE80211_CONF_PS; 1624 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1625 del_timer_sync(&local->dynamic_ps_timer); 1626 cancel_work_sync(&local->dynamic_ps_enable_work); 1627 } 1628 } 1629 1630 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1631 { 1632 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1633 struct sta_info *sta = NULL; 1634 bool authorized = false; 1635 1636 if (!mgd->powersave) 1637 return false; 1638 1639 if (mgd->broken_ap) 1640 return false; 1641 1642 if (!mgd->associated) 1643 return false; 1644 1645 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1646 return false; 1647 1648 if (!mgd->have_beacon) 1649 return false; 1650 1651 rcu_read_lock(); 1652 sta = sta_info_get(sdata, mgd->bssid); 1653 if (sta) 1654 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1655 rcu_read_unlock(); 1656 1657 return authorized; 1658 } 1659 1660 /* need to hold RTNL or interface lock */ 1661 void ieee80211_recalc_ps(struct ieee80211_local *local) 1662 { 1663 struct ieee80211_sub_if_data *sdata, *found = NULL; 1664 int count = 0; 1665 int timeout; 1666 1667 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1668 local->ps_sdata = NULL; 1669 return; 1670 } 1671 1672 list_for_each_entry(sdata, &local->interfaces, list) { 1673 if (!ieee80211_sdata_running(sdata)) 1674 continue; 1675 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1676 /* If an AP vif is found, then disable PS 1677 * by setting the count to zero thereby setting 1678 * ps_sdata to NULL. 1679 */ 1680 count = 0; 1681 break; 1682 } 1683 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1684 continue; 1685 found = sdata; 1686 count++; 1687 } 1688 1689 if (count == 1 && ieee80211_powersave_allowed(found)) { 1690 u8 dtimper = found->u.mgd.dtim_period; 1691 1692 timeout = local->dynamic_ps_forced_timeout; 1693 if (timeout < 0) 1694 timeout = 100; 1695 local->hw.conf.dynamic_ps_timeout = timeout; 1696 1697 /* If the TIM IE is invalid, pretend the value is 1 */ 1698 if (!dtimper) 1699 dtimper = 1; 1700 1701 local->hw.conf.ps_dtim_period = dtimper; 1702 local->ps_sdata = found; 1703 } else { 1704 local->ps_sdata = NULL; 1705 } 1706 1707 ieee80211_change_ps(local); 1708 } 1709 1710 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1711 { 1712 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1713 1714 if (sdata->vif.bss_conf.ps != ps_allowed) { 1715 sdata->vif.bss_conf.ps = ps_allowed; 1716 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1717 } 1718 } 1719 1720 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1721 { 1722 struct ieee80211_local *local = 1723 container_of(work, struct ieee80211_local, 1724 dynamic_ps_disable_work); 1725 1726 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1727 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1728 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1729 } 1730 1731 ieee80211_wake_queues_by_reason(&local->hw, 1732 IEEE80211_MAX_QUEUE_MAP, 1733 IEEE80211_QUEUE_STOP_REASON_PS, 1734 false); 1735 } 1736 1737 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1738 { 1739 struct ieee80211_local *local = 1740 container_of(work, struct ieee80211_local, 1741 dynamic_ps_enable_work); 1742 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1743 struct ieee80211_if_managed *ifmgd; 1744 unsigned long flags; 1745 int q; 1746 1747 /* can only happen when PS was just disabled anyway */ 1748 if (!sdata) 1749 return; 1750 1751 ifmgd = &sdata->u.mgd; 1752 1753 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1754 return; 1755 1756 if (local->hw.conf.dynamic_ps_timeout > 0) { 1757 /* don't enter PS if TX frames are pending */ 1758 if (drv_tx_frames_pending(local)) { 1759 mod_timer(&local->dynamic_ps_timer, jiffies + 1760 msecs_to_jiffies( 1761 local->hw.conf.dynamic_ps_timeout)); 1762 return; 1763 } 1764 1765 /* 1766 * transmission can be stopped by others which leads to 1767 * dynamic_ps_timer expiry. Postpone the ps timer if it 1768 * is not the actual idle state. 1769 */ 1770 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1771 for (q = 0; q < local->hw.queues; q++) { 1772 if (local->queue_stop_reasons[q]) { 1773 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1774 flags); 1775 mod_timer(&local->dynamic_ps_timer, jiffies + 1776 msecs_to_jiffies( 1777 local->hw.conf.dynamic_ps_timeout)); 1778 return; 1779 } 1780 } 1781 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1782 } 1783 1784 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1785 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1786 if (drv_tx_frames_pending(local)) { 1787 mod_timer(&local->dynamic_ps_timer, jiffies + 1788 msecs_to_jiffies( 1789 local->hw.conf.dynamic_ps_timeout)); 1790 } else { 1791 ieee80211_send_nullfunc(local, sdata, true); 1792 /* Flush to get the tx status of nullfunc frame */ 1793 ieee80211_flush_queues(local, sdata, false); 1794 } 1795 } 1796 1797 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1798 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1799 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1800 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1801 local->hw.conf.flags |= IEEE80211_CONF_PS; 1802 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1803 } 1804 } 1805 1806 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1807 { 1808 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1809 1810 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1811 } 1812 1813 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1814 { 1815 struct delayed_work *delayed_work = to_delayed_work(work); 1816 struct ieee80211_sub_if_data *sdata = 1817 container_of(delayed_work, struct ieee80211_sub_if_data, 1818 dfs_cac_timer_work); 1819 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1820 1821 mutex_lock(&sdata->local->mtx); 1822 if (sdata->wdev.cac_started) { 1823 ieee80211_vif_release_channel(sdata); 1824 cfg80211_cac_event(sdata->dev, &chandef, 1825 NL80211_RADAR_CAC_FINISHED, 1826 GFP_KERNEL); 1827 } 1828 mutex_unlock(&sdata->local->mtx); 1829 } 1830 1831 static bool 1832 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1833 { 1834 struct ieee80211_local *local = sdata->local; 1835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1836 bool ret = false; 1837 int ac; 1838 1839 if (local->hw.queues < IEEE80211_NUM_ACS) 1840 return false; 1841 1842 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1843 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1844 int non_acm_ac; 1845 unsigned long now = jiffies; 1846 1847 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1848 tx_tspec->admitted_time && 1849 time_after(now, tx_tspec->time_slice_start + HZ)) { 1850 tx_tspec->consumed_tx_time = 0; 1851 tx_tspec->time_slice_start = now; 1852 1853 if (tx_tspec->downgraded) 1854 tx_tspec->action = 1855 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1856 } 1857 1858 switch (tx_tspec->action) { 1859 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1860 /* take the original parameters */ 1861 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1862 sdata_err(sdata, 1863 "failed to set TX queue parameters for queue %d\n", 1864 ac); 1865 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1866 tx_tspec->downgraded = false; 1867 ret = true; 1868 break; 1869 case TX_TSPEC_ACTION_DOWNGRADE: 1870 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1871 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1872 ret = true; 1873 break; 1874 } 1875 /* downgrade next lower non-ACM AC */ 1876 for (non_acm_ac = ac + 1; 1877 non_acm_ac < IEEE80211_NUM_ACS; 1878 non_acm_ac++) 1879 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1880 break; 1881 /* Usually the loop will result in using BK even if it 1882 * requires admission control, but such a configuration 1883 * makes no sense and we have to transmit somehow - the 1884 * AC selection does the same thing. 1885 * If we started out trying to downgrade from BK, then 1886 * the extra condition here might be needed. 1887 */ 1888 if (non_acm_ac >= IEEE80211_NUM_ACS) 1889 non_acm_ac = IEEE80211_AC_BK; 1890 if (drv_conf_tx(local, sdata, ac, 1891 &sdata->tx_conf[non_acm_ac])) 1892 sdata_err(sdata, 1893 "failed to set TX queue parameters for queue %d\n", 1894 ac); 1895 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1896 ret = true; 1897 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1898 tx_tspec->time_slice_start + HZ - now + 1); 1899 break; 1900 case TX_TSPEC_ACTION_NONE: 1901 /* nothing now */ 1902 break; 1903 } 1904 } 1905 1906 return ret; 1907 } 1908 1909 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1910 { 1911 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1912 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1913 } 1914 1915 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1916 { 1917 struct ieee80211_sub_if_data *sdata; 1918 1919 sdata = container_of(work, struct ieee80211_sub_if_data, 1920 u.mgd.tx_tspec_wk.work); 1921 ieee80211_sta_handle_tspec_ac_params(sdata); 1922 } 1923 1924 /* MLME */ 1925 static bool 1926 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1927 struct ieee80211_sub_if_data *sdata, 1928 const u8 *wmm_param, size_t wmm_param_len, 1929 const struct ieee80211_mu_edca_param_set *mu_edca) 1930 { 1931 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1933 size_t left; 1934 int count, mu_edca_count, ac; 1935 const u8 *pos; 1936 u8 uapsd_queues = 0; 1937 1938 if (!local->ops->conf_tx) 1939 return false; 1940 1941 if (local->hw.queues < IEEE80211_NUM_ACS) 1942 return false; 1943 1944 if (!wmm_param) 1945 return false; 1946 1947 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1948 return false; 1949 1950 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1951 uapsd_queues = ifmgd->uapsd_queues; 1952 1953 count = wmm_param[6] & 0x0f; 1954 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1955 * if mu_edca was preset before and now it disappeared tell 1956 * the driver about it. 1957 */ 1958 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1959 if (count == ifmgd->wmm_last_param_set && 1960 mu_edca_count == ifmgd->mu_edca_last_param_set) 1961 return false; 1962 ifmgd->wmm_last_param_set = count; 1963 ifmgd->mu_edca_last_param_set = mu_edca_count; 1964 1965 pos = wmm_param + 8; 1966 left = wmm_param_len - 8; 1967 1968 memset(¶ms, 0, sizeof(params)); 1969 1970 sdata->wmm_acm = 0; 1971 for (; left >= 4; left -= 4, pos += 4) { 1972 int aci = (pos[0] >> 5) & 0x03; 1973 int acm = (pos[0] >> 4) & 0x01; 1974 bool uapsd = false; 1975 1976 switch (aci) { 1977 case 1: /* AC_BK */ 1978 ac = IEEE80211_AC_BK; 1979 if (acm) 1980 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1981 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1982 uapsd = true; 1983 params[ac].mu_edca = !!mu_edca; 1984 if (mu_edca) 1985 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 1986 break; 1987 case 2: /* AC_VI */ 1988 ac = IEEE80211_AC_VI; 1989 if (acm) 1990 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1991 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1992 uapsd = true; 1993 params[ac].mu_edca = !!mu_edca; 1994 if (mu_edca) 1995 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 1996 break; 1997 case 3: /* AC_VO */ 1998 ac = IEEE80211_AC_VO; 1999 if (acm) 2000 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2001 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2002 uapsd = true; 2003 params[ac].mu_edca = !!mu_edca; 2004 if (mu_edca) 2005 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2006 break; 2007 case 0: /* AC_BE */ 2008 default: 2009 ac = IEEE80211_AC_BE; 2010 if (acm) 2011 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2012 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2013 uapsd = true; 2014 params[ac].mu_edca = !!mu_edca; 2015 if (mu_edca) 2016 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2017 break; 2018 } 2019 2020 params[ac].aifs = pos[0] & 0x0f; 2021 2022 if (params[ac].aifs < 2) { 2023 sdata_info(sdata, 2024 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2025 params[ac].aifs, aci); 2026 params[ac].aifs = 2; 2027 } 2028 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2029 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2030 params[ac].txop = get_unaligned_le16(pos + 2); 2031 params[ac].acm = acm; 2032 params[ac].uapsd = uapsd; 2033 2034 if (params[ac].cw_min == 0 || 2035 params[ac].cw_min > params[ac].cw_max) { 2036 sdata_info(sdata, 2037 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2038 params[ac].cw_min, params[ac].cw_max, aci); 2039 return false; 2040 } 2041 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2042 } 2043 2044 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2045 mlme_dbg(sdata, 2046 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2047 ac, params[ac].acm, 2048 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2049 params[ac].txop, params[ac].uapsd, 2050 ifmgd->tx_tspec[ac].downgraded); 2051 sdata->tx_conf[ac] = params[ac]; 2052 if (!ifmgd->tx_tspec[ac].downgraded && 2053 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2054 sdata_err(sdata, 2055 "failed to set TX queue parameters for AC %d\n", 2056 ac); 2057 } 2058 2059 /* enable WMM or activate new settings */ 2060 sdata->vif.bss_conf.qos = true; 2061 return true; 2062 } 2063 2064 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2065 { 2066 lockdep_assert_held(&sdata->local->mtx); 2067 2068 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2069 ieee80211_run_deferred_scan(sdata->local); 2070 } 2071 2072 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2073 { 2074 mutex_lock(&sdata->local->mtx); 2075 __ieee80211_stop_poll(sdata); 2076 mutex_unlock(&sdata->local->mtx); 2077 } 2078 2079 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2080 u16 capab, bool erp_valid, u8 erp) 2081 { 2082 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2083 struct ieee80211_supported_band *sband; 2084 u32 changed = 0; 2085 bool use_protection; 2086 bool use_short_preamble; 2087 bool use_short_slot; 2088 2089 sband = ieee80211_get_sband(sdata); 2090 if (!sband) 2091 return changed; 2092 2093 if (erp_valid) { 2094 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2095 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2096 } else { 2097 use_protection = false; 2098 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2099 } 2100 2101 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2102 if (sband->band == NL80211_BAND_5GHZ) 2103 use_short_slot = true; 2104 2105 if (use_protection != bss_conf->use_cts_prot) { 2106 bss_conf->use_cts_prot = use_protection; 2107 changed |= BSS_CHANGED_ERP_CTS_PROT; 2108 } 2109 2110 if (use_short_preamble != bss_conf->use_short_preamble) { 2111 bss_conf->use_short_preamble = use_short_preamble; 2112 changed |= BSS_CHANGED_ERP_PREAMBLE; 2113 } 2114 2115 if (use_short_slot != bss_conf->use_short_slot) { 2116 bss_conf->use_short_slot = use_short_slot; 2117 changed |= BSS_CHANGED_ERP_SLOT; 2118 } 2119 2120 return changed; 2121 } 2122 2123 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2124 struct cfg80211_bss *cbss, 2125 u32 bss_info_changed) 2126 { 2127 struct ieee80211_bss *bss = (void *)cbss->priv; 2128 struct ieee80211_local *local = sdata->local; 2129 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2130 2131 bss_info_changed |= BSS_CHANGED_ASSOC; 2132 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2133 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2134 2135 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2136 beacon_loss_count * bss_conf->beacon_int)); 2137 2138 sdata->u.mgd.associated = cbss; 2139 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2140 2141 ieee80211_check_rate_mask(sdata); 2142 2143 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2144 2145 if (sdata->vif.p2p || 2146 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2147 const struct cfg80211_bss_ies *ies; 2148 2149 rcu_read_lock(); 2150 ies = rcu_dereference(cbss->ies); 2151 if (ies) { 2152 int ret; 2153 2154 ret = cfg80211_get_p2p_attr( 2155 ies->data, ies->len, 2156 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2157 (u8 *) &bss_conf->p2p_noa_attr, 2158 sizeof(bss_conf->p2p_noa_attr)); 2159 if (ret >= 2) { 2160 sdata->u.mgd.p2p_noa_index = 2161 bss_conf->p2p_noa_attr.index; 2162 bss_info_changed |= BSS_CHANGED_P2P_PS; 2163 } 2164 } 2165 rcu_read_unlock(); 2166 } 2167 2168 /* just to be sure */ 2169 ieee80211_stop_poll(sdata); 2170 2171 ieee80211_led_assoc(local, 1); 2172 2173 if (sdata->u.mgd.have_beacon) { 2174 /* 2175 * If the AP is buggy we may get here with no DTIM period 2176 * known, so assume it's 1 which is the only safe assumption 2177 * in that case, although if the TIM IE is broken powersave 2178 * probably just won't work at all. 2179 */ 2180 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2181 bss_conf->beacon_rate = bss->beacon_rate; 2182 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2183 } else { 2184 bss_conf->beacon_rate = NULL; 2185 bss_conf->dtim_period = 0; 2186 } 2187 2188 bss_conf->assoc = 1; 2189 2190 /* Tell the driver to monitor connection quality (if supported) */ 2191 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2192 bss_conf->cqm_rssi_thold) 2193 bss_info_changed |= BSS_CHANGED_CQM; 2194 2195 /* Enable ARP filtering */ 2196 if (bss_conf->arp_addr_cnt) 2197 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2198 2199 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2200 2201 mutex_lock(&local->iflist_mtx); 2202 ieee80211_recalc_ps(local); 2203 mutex_unlock(&local->iflist_mtx); 2204 2205 ieee80211_recalc_smps(sdata); 2206 ieee80211_recalc_ps_vif(sdata); 2207 2208 netif_carrier_on(sdata->dev); 2209 } 2210 2211 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2212 u16 stype, u16 reason, bool tx, 2213 u8 *frame_buf) 2214 { 2215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2216 struct ieee80211_local *local = sdata->local; 2217 u32 changed = 0; 2218 2219 sdata_assert_lock(sdata); 2220 2221 if (WARN_ON_ONCE(tx && !frame_buf)) 2222 return; 2223 2224 if (WARN_ON(!ifmgd->associated)) 2225 return; 2226 2227 ieee80211_stop_poll(sdata); 2228 2229 ifmgd->associated = NULL; 2230 netif_carrier_off(sdata->dev); 2231 2232 /* 2233 * if we want to get out of ps before disassoc (why?) we have 2234 * to do it before sending disassoc, as otherwise the null-packet 2235 * won't be valid. 2236 */ 2237 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2238 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2239 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2240 } 2241 local->ps_sdata = NULL; 2242 2243 /* disable per-vif ps */ 2244 ieee80211_recalc_ps_vif(sdata); 2245 2246 /* make sure ongoing transmission finishes */ 2247 synchronize_net(); 2248 2249 /* 2250 * drop any frame before deauth/disassoc, this can be data or 2251 * management frame. Since we are disconnecting, we should not 2252 * insist sending these frames which can take time and delay 2253 * the disconnection and possible the roaming. 2254 */ 2255 if (tx) 2256 ieee80211_flush_queues(local, sdata, true); 2257 2258 /* deauthenticate/disassociate now */ 2259 if (tx || frame_buf) { 2260 /* 2261 * In multi channel scenarios guarantee that the virtual 2262 * interface is granted immediate airtime to transmit the 2263 * deauthentication frame by calling mgd_prepare_tx, if the 2264 * driver requested so. 2265 */ 2266 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2267 !ifmgd->have_beacon) 2268 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2269 2270 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2271 reason, tx, frame_buf); 2272 } 2273 2274 /* flush out frame - make sure the deauth was actually sent */ 2275 if (tx) 2276 ieee80211_flush_queues(local, sdata, false); 2277 2278 /* clear bssid only after building the needed mgmt frames */ 2279 eth_zero_addr(ifmgd->bssid); 2280 2281 /* remove AP and TDLS peers */ 2282 sta_info_flush(sdata); 2283 2284 /* finally reset all BSS / config parameters */ 2285 changed |= ieee80211_reset_erp_info(sdata); 2286 2287 ieee80211_led_assoc(local, 0); 2288 changed |= BSS_CHANGED_ASSOC; 2289 sdata->vif.bss_conf.assoc = false; 2290 2291 ifmgd->p2p_noa_index = -1; 2292 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2293 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2294 2295 /* on the next assoc, re-program HT/VHT parameters */ 2296 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2297 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2298 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2299 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2300 2301 /* reset MU-MIMO ownership and group data */ 2302 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2303 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2304 memset(sdata->vif.bss_conf.mu_group.position, 0, 2305 sizeof(sdata->vif.bss_conf.mu_group.position)); 2306 changed |= BSS_CHANGED_MU_GROUPS; 2307 sdata->vif.mu_mimo_owner = false; 2308 2309 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2310 2311 del_timer_sync(&local->dynamic_ps_timer); 2312 cancel_work_sync(&local->dynamic_ps_enable_work); 2313 2314 /* Disable ARP filtering */ 2315 if (sdata->vif.bss_conf.arp_addr_cnt) 2316 changed |= BSS_CHANGED_ARP_FILTER; 2317 2318 sdata->vif.bss_conf.qos = false; 2319 changed |= BSS_CHANGED_QOS; 2320 2321 /* The BSSID (not really interesting) and HT changed */ 2322 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2323 ieee80211_bss_info_change_notify(sdata, changed); 2324 2325 /* disassociated - set to defaults now */ 2326 ieee80211_set_wmm_default(sdata, false, false); 2327 2328 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2329 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2330 del_timer_sync(&sdata->u.mgd.timer); 2331 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2332 2333 sdata->vif.bss_conf.dtim_period = 0; 2334 sdata->vif.bss_conf.beacon_rate = NULL; 2335 2336 ifmgd->have_beacon = false; 2337 2338 ifmgd->flags = 0; 2339 mutex_lock(&local->mtx); 2340 ieee80211_vif_release_channel(sdata); 2341 2342 sdata->vif.csa_active = false; 2343 ifmgd->csa_waiting_bcn = false; 2344 ifmgd->csa_ignored_same_chan = false; 2345 if (sdata->csa_block_tx) { 2346 ieee80211_wake_vif_queues(local, sdata, 2347 IEEE80211_QUEUE_STOP_REASON_CSA); 2348 sdata->csa_block_tx = false; 2349 } 2350 mutex_unlock(&local->mtx); 2351 2352 /* existing TX TSPEC sessions no longer exist */ 2353 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2354 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2355 2356 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2357 } 2358 2359 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2360 struct ieee80211_hdr *hdr) 2361 { 2362 /* 2363 * We can postpone the mgd.timer whenever receiving unicast frames 2364 * from AP because we know that the connection is working both ways 2365 * at that time. But multicast frames (and hence also beacons) must 2366 * be ignored here, because we need to trigger the timer during 2367 * data idle periods for sending the periodic probe request to the 2368 * AP we're connected to. 2369 */ 2370 if (is_multicast_ether_addr(hdr->addr1)) 2371 return; 2372 2373 ieee80211_sta_reset_conn_monitor(sdata); 2374 } 2375 2376 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2377 { 2378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2379 struct ieee80211_local *local = sdata->local; 2380 2381 mutex_lock(&local->mtx); 2382 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2383 goto out; 2384 2385 __ieee80211_stop_poll(sdata); 2386 2387 mutex_lock(&local->iflist_mtx); 2388 ieee80211_recalc_ps(local); 2389 mutex_unlock(&local->iflist_mtx); 2390 2391 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2392 goto out; 2393 2394 /* 2395 * We've received a probe response, but are not sure whether 2396 * we have or will be receiving any beacons or data, so let's 2397 * schedule the timers again, just in case. 2398 */ 2399 ieee80211_sta_reset_beacon_monitor(sdata); 2400 2401 mod_timer(&ifmgd->conn_mon_timer, 2402 round_jiffies_up(jiffies + 2403 IEEE80211_CONNECTION_IDLE_TIME)); 2404 out: 2405 mutex_unlock(&local->mtx); 2406 } 2407 2408 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2409 struct ieee80211_hdr *hdr, 2410 u16 tx_time) 2411 { 2412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2413 u16 tid = ieee80211_get_tid(hdr); 2414 int ac = ieee80211_ac_from_tid(tid); 2415 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2416 unsigned long now = jiffies; 2417 2418 if (likely(!tx_tspec->admitted_time)) 2419 return; 2420 2421 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2422 tx_tspec->consumed_tx_time = 0; 2423 tx_tspec->time_slice_start = now; 2424 2425 if (tx_tspec->downgraded) { 2426 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2427 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2428 } 2429 } 2430 2431 if (tx_tspec->downgraded) 2432 return; 2433 2434 tx_tspec->consumed_tx_time += tx_time; 2435 2436 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2437 tx_tspec->downgraded = true; 2438 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2439 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2440 } 2441 } 2442 2443 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2444 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2445 { 2446 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2447 2448 if (!ieee80211_is_data(hdr->frame_control)) 2449 return; 2450 2451 if (ieee80211_is_nullfunc(hdr->frame_control) && 2452 sdata->u.mgd.probe_send_count > 0) { 2453 if (ack) 2454 ieee80211_sta_reset_conn_monitor(sdata); 2455 else 2456 sdata->u.mgd.nullfunc_failed = true; 2457 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2458 return; 2459 } 2460 2461 if (ack) 2462 ieee80211_sta_reset_conn_monitor(sdata); 2463 } 2464 2465 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2466 const u8 *src, const u8 *dst, 2467 const u8 *ssid, size_t ssid_len, 2468 struct ieee80211_channel *channel) 2469 { 2470 struct sk_buff *skb; 2471 2472 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2473 ssid, ssid_len, NULL, 0, 2474 IEEE80211_PROBE_FLAG_DIRECTED); 2475 if (skb) 2476 ieee80211_tx_skb(sdata, skb); 2477 } 2478 2479 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2480 { 2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2482 const u8 *ssid; 2483 u8 *dst = ifmgd->associated->bssid; 2484 u8 unicast_limit = max(1, max_probe_tries - 3); 2485 struct sta_info *sta; 2486 2487 /* 2488 * Try sending broadcast probe requests for the last three 2489 * probe requests after the first ones failed since some 2490 * buggy APs only support broadcast probe requests. 2491 */ 2492 if (ifmgd->probe_send_count >= unicast_limit) 2493 dst = NULL; 2494 2495 /* 2496 * When the hardware reports an accurate Tx ACK status, it's 2497 * better to send a nullfunc frame instead of a probe request, 2498 * as it will kick us off the AP quickly if we aren't associated 2499 * anymore. The timeout will be reset if the frame is ACKed by 2500 * the AP. 2501 */ 2502 ifmgd->probe_send_count++; 2503 2504 if (dst) { 2505 mutex_lock(&sdata->local->sta_mtx); 2506 sta = sta_info_get(sdata, dst); 2507 if (!WARN_ON(!sta)) 2508 ieee80211_check_fast_rx(sta); 2509 mutex_unlock(&sdata->local->sta_mtx); 2510 } 2511 2512 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2513 ifmgd->nullfunc_failed = false; 2514 ieee80211_send_nullfunc(sdata->local, sdata, false); 2515 } else { 2516 int ssid_len; 2517 2518 rcu_read_lock(); 2519 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2520 if (WARN_ON_ONCE(ssid == NULL)) 2521 ssid_len = 0; 2522 else 2523 ssid_len = ssid[1]; 2524 2525 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2526 ssid + 2, ssid_len, 2527 ifmgd->associated->channel); 2528 rcu_read_unlock(); 2529 } 2530 2531 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2532 run_again(sdata, ifmgd->probe_timeout); 2533 } 2534 2535 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2536 bool beacon) 2537 { 2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2539 bool already = false; 2540 2541 if (!ieee80211_sdata_running(sdata)) 2542 return; 2543 2544 sdata_lock(sdata); 2545 2546 if (!ifmgd->associated) 2547 goto out; 2548 2549 mutex_lock(&sdata->local->mtx); 2550 2551 if (sdata->local->tmp_channel || sdata->local->scanning) { 2552 mutex_unlock(&sdata->local->mtx); 2553 goto out; 2554 } 2555 2556 if (beacon) { 2557 mlme_dbg_ratelimited(sdata, 2558 "detected beacon loss from AP (missed %d beacons) - probing\n", 2559 beacon_loss_count); 2560 2561 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2562 } 2563 2564 /* 2565 * The driver/our work has already reported this event or the 2566 * connection monitoring has kicked in and we have already sent 2567 * a probe request. Or maybe the AP died and the driver keeps 2568 * reporting until we disassociate... 2569 * 2570 * In either case we have to ignore the current call to this 2571 * function (except for setting the correct probe reason bit) 2572 * because otherwise we would reset the timer every time and 2573 * never check whether we received a probe response! 2574 */ 2575 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2576 already = true; 2577 2578 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2579 2580 mutex_unlock(&sdata->local->mtx); 2581 2582 if (already) 2583 goto out; 2584 2585 mutex_lock(&sdata->local->iflist_mtx); 2586 ieee80211_recalc_ps(sdata->local); 2587 mutex_unlock(&sdata->local->iflist_mtx); 2588 2589 ifmgd->probe_send_count = 0; 2590 ieee80211_mgd_probe_ap_send(sdata); 2591 out: 2592 sdata_unlock(sdata); 2593 } 2594 2595 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2596 struct ieee80211_vif *vif) 2597 { 2598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2600 struct cfg80211_bss *cbss; 2601 struct sk_buff *skb; 2602 const u8 *ssid; 2603 int ssid_len; 2604 2605 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2606 return NULL; 2607 2608 sdata_assert_lock(sdata); 2609 2610 if (ifmgd->associated) 2611 cbss = ifmgd->associated; 2612 else if (ifmgd->auth_data) 2613 cbss = ifmgd->auth_data->bss; 2614 else if (ifmgd->assoc_data) 2615 cbss = ifmgd->assoc_data->bss; 2616 else 2617 return NULL; 2618 2619 rcu_read_lock(); 2620 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2621 if (WARN_ON_ONCE(ssid == NULL)) 2622 ssid_len = 0; 2623 else 2624 ssid_len = ssid[1]; 2625 2626 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2627 (u32) -1, cbss->channel, 2628 ssid + 2, ssid_len, 2629 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2630 rcu_read_unlock(); 2631 2632 return skb; 2633 } 2634 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2635 2636 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2637 const u8 *buf, size_t len, bool tx, 2638 u16 reason) 2639 { 2640 struct ieee80211_event event = { 2641 .type = MLME_EVENT, 2642 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2643 .u.mlme.reason = reason, 2644 }; 2645 2646 if (tx) 2647 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2648 else 2649 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2650 2651 drv_event_callback(sdata->local, sdata, &event); 2652 } 2653 2654 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2655 { 2656 struct ieee80211_local *local = sdata->local; 2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2658 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2659 bool tx; 2660 2661 sdata_lock(sdata); 2662 if (!ifmgd->associated) { 2663 sdata_unlock(sdata); 2664 return; 2665 } 2666 2667 tx = !sdata->csa_block_tx; 2668 2669 /* AP is probably out of range (or not reachable for another reason) so 2670 * remove the bss struct for that AP. 2671 */ 2672 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2673 2674 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2676 tx, frame_buf); 2677 mutex_lock(&local->mtx); 2678 sdata->vif.csa_active = false; 2679 ifmgd->csa_waiting_bcn = false; 2680 if (sdata->csa_block_tx) { 2681 ieee80211_wake_vif_queues(local, sdata, 2682 IEEE80211_QUEUE_STOP_REASON_CSA); 2683 sdata->csa_block_tx = false; 2684 } 2685 mutex_unlock(&local->mtx); 2686 2687 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2688 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2689 2690 sdata_unlock(sdata); 2691 } 2692 2693 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2694 { 2695 struct ieee80211_sub_if_data *sdata = 2696 container_of(work, struct ieee80211_sub_if_data, 2697 u.mgd.beacon_connection_loss_work); 2698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2699 2700 if (ifmgd->associated) 2701 ifmgd->beacon_loss_count++; 2702 2703 if (ifmgd->connection_loss) { 2704 sdata_info(sdata, "Connection to AP %pM lost\n", 2705 ifmgd->bssid); 2706 __ieee80211_disconnect(sdata); 2707 } else { 2708 ieee80211_mgd_probe_ap(sdata, true); 2709 } 2710 } 2711 2712 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2713 { 2714 struct ieee80211_sub_if_data *sdata = 2715 container_of(work, struct ieee80211_sub_if_data, 2716 u.mgd.csa_connection_drop_work); 2717 2718 __ieee80211_disconnect(sdata); 2719 } 2720 2721 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2722 { 2723 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2724 struct ieee80211_hw *hw = &sdata->local->hw; 2725 2726 trace_api_beacon_loss(sdata); 2727 2728 sdata->u.mgd.connection_loss = false; 2729 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2730 } 2731 EXPORT_SYMBOL(ieee80211_beacon_loss); 2732 2733 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2734 { 2735 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2736 struct ieee80211_hw *hw = &sdata->local->hw; 2737 2738 trace_api_connection_loss(sdata); 2739 2740 sdata->u.mgd.connection_loss = true; 2741 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2742 } 2743 EXPORT_SYMBOL(ieee80211_connection_loss); 2744 2745 2746 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2747 bool assoc) 2748 { 2749 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2750 2751 sdata_assert_lock(sdata); 2752 2753 if (!assoc) { 2754 /* 2755 * we are not authenticated yet, the only timer that could be 2756 * running is the timeout for the authentication response which 2757 * which is not relevant anymore. 2758 */ 2759 del_timer_sync(&sdata->u.mgd.timer); 2760 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2761 2762 eth_zero_addr(sdata->u.mgd.bssid); 2763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2764 sdata->u.mgd.flags = 0; 2765 mutex_lock(&sdata->local->mtx); 2766 ieee80211_vif_release_channel(sdata); 2767 mutex_unlock(&sdata->local->mtx); 2768 } 2769 2770 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2771 kfree(auth_data); 2772 sdata->u.mgd.auth_data = NULL; 2773 } 2774 2775 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2776 bool assoc, bool abandon) 2777 { 2778 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2779 2780 sdata_assert_lock(sdata); 2781 2782 if (!assoc) { 2783 /* 2784 * we are not associated yet, the only timer that could be 2785 * running is the timeout for the association response which 2786 * which is not relevant anymore. 2787 */ 2788 del_timer_sync(&sdata->u.mgd.timer); 2789 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2790 2791 eth_zero_addr(sdata->u.mgd.bssid); 2792 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2793 sdata->u.mgd.flags = 0; 2794 sdata->vif.mu_mimo_owner = false; 2795 2796 mutex_lock(&sdata->local->mtx); 2797 ieee80211_vif_release_channel(sdata); 2798 mutex_unlock(&sdata->local->mtx); 2799 2800 if (abandon) 2801 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2802 } 2803 2804 kfree(assoc_data); 2805 sdata->u.mgd.assoc_data = NULL; 2806 } 2807 2808 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2809 struct ieee80211_mgmt *mgmt, size_t len) 2810 { 2811 struct ieee80211_local *local = sdata->local; 2812 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2813 u8 *pos; 2814 struct ieee802_11_elems elems; 2815 u32 tx_flags = 0; 2816 2817 pos = mgmt->u.auth.variable; 2818 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2819 mgmt->bssid, auth_data->bss->bssid); 2820 if (!elems.challenge) 2821 return; 2822 auth_data->expected_transaction = 4; 2823 drv_mgd_prepare_tx(sdata->local, sdata, 0); 2824 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2825 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2826 IEEE80211_TX_INTFL_MLME_CONN_TX; 2827 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2828 elems.challenge - 2, elems.challenge_len + 2, 2829 auth_data->bss->bssid, auth_data->bss->bssid, 2830 auth_data->key, auth_data->key_len, 2831 auth_data->key_idx, tx_flags); 2832 } 2833 2834 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2835 const u8 *bssid) 2836 { 2837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2838 struct sta_info *sta; 2839 bool result = true; 2840 2841 sdata_info(sdata, "authenticated\n"); 2842 ifmgd->auth_data->done = true; 2843 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2844 ifmgd->auth_data->timeout_started = true; 2845 run_again(sdata, ifmgd->auth_data->timeout); 2846 2847 /* move station state to auth */ 2848 mutex_lock(&sdata->local->sta_mtx); 2849 sta = sta_info_get(sdata, bssid); 2850 if (!sta) { 2851 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2852 result = false; 2853 goto out; 2854 } 2855 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2856 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2857 result = false; 2858 goto out; 2859 } 2860 2861 out: 2862 mutex_unlock(&sdata->local->sta_mtx); 2863 return result; 2864 } 2865 2866 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2867 struct ieee80211_mgmt *mgmt, size_t len) 2868 { 2869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2870 u8 bssid[ETH_ALEN]; 2871 u16 auth_alg, auth_transaction, status_code; 2872 struct ieee80211_event event = { 2873 .type = MLME_EVENT, 2874 .u.mlme.data = AUTH_EVENT, 2875 }; 2876 2877 sdata_assert_lock(sdata); 2878 2879 if (len < 24 + 6) 2880 return; 2881 2882 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2883 return; 2884 2885 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2886 2887 if (!ether_addr_equal(bssid, mgmt->bssid)) 2888 return; 2889 2890 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2891 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2892 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2893 2894 if (auth_alg != ifmgd->auth_data->algorithm || 2895 (auth_alg != WLAN_AUTH_SAE && 2896 auth_transaction != ifmgd->auth_data->expected_transaction) || 2897 (auth_alg == WLAN_AUTH_SAE && 2898 (auth_transaction < ifmgd->auth_data->expected_transaction || 2899 auth_transaction > 2))) { 2900 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2901 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2902 auth_transaction, 2903 ifmgd->auth_data->expected_transaction); 2904 return; 2905 } 2906 2907 if (status_code != WLAN_STATUS_SUCCESS) { 2908 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2909 mgmt->sa, status_code); 2910 ieee80211_destroy_auth_data(sdata, false); 2911 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2912 event.u.mlme.status = MLME_DENIED; 2913 event.u.mlme.reason = status_code; 2914 drv_event_callback(sdata->local, sdata, &event); 2915 return; 2916 } 2917 2918 switch (ifmgd->auth_data->algorithm) { 2919 case WLAN_AUTH_OPEN: 2920 case WLAN_AUTH_LEAP: 2921 case WLAN_AUTH_FT: 2922 case WLAN_AUTH_SAE: 2923 case WLAN_AUTH_FILS_SK: 2924 case WLAN_AUTH_FILS_SK_PFS: 2925 case WLAN_AUTH_FILS_PK: 2926 break; 2927 case WLAN_AUTH_SHARED_KEY: 2928 if (ifmgd->auth_data->expected_transaction != 4) { 2929 ieee80211_auth_challenge(sdata, mgmt, len); 2930 /* need another frame */ 2931 return; 2932 } 2933 break; 2934 default: 2935 WARN_ONCE(1, "invalid auth alg %d", 2936 ifmgd->auth_data->algorithm); 2937 return; 2938 } 2939 2940 event.u.mlme.status = MLME_SUCCESS; 2941 drv_event_callback(sdata->local, sdata, &event); 2942 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 2943 (auth_transaction == 2 && 2944 ifmgd->auth_data->expected_transaction == 2)) { 2945 if (!ieee80211_mark_sta_auth(sdata, bssid)) 2946 goto out_err; 2947 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2948 auth_transaction == 2) { 2949 sdata_info(sdata, "SAE peer confirmed\n"); 2950 ifmgd->auth_data->peer_confirmed = true; 2951 } 2952 2953 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2954 return; 2955 out_err: 2956 mutex_unlock(&sdata->local->sta_mtx); 2957 /* ignore frame -- wait for timeout */ 2958 } 2959 2960 #define case_WLAN(type) \ 2961 case WLAN_REASON_##type: return #type 2962 2963 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2964 { 2965 switch (reason_code) { 2966 case_WLAN(UNSPECIFIED); 2967 case_WLAN(PREV_AUTH_NOT_VALID); 2968 case_WLAN(DEAUTH_LEAVING); 2969 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2970 case_WLAN(DISASSOC_AP_BUSY); 2971 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2972 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2973 case_WLAN(DISASSOC_STA_HAS_LEFT); 2974 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2975 case_WLAN(DISASSOC_BAD_POWER); 2976 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2977 case_WLAN(INVALID_IE); 2978 case_WLAN(MIC_FAILURE); 2979 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2980 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2981 case_WLAN(IE_DIFFERENT); 2982 case_WLAN(INVALID_GROUP_CIPHER); 2983 case_WLAN(INVALID_PAIRWISE_CIPHER); 2984 case_WLAN(INVALID_AKMP); 2985 case_WLAN(UNSUPP_RSN_VERSION); 2986 case_WLAN(INVALID_RSN_IE_CAP); 2987 case_WLAN(IEEE8021X_FAILED); 2988 case_WLAN(CIPHER_SUITE_REJECTED); 2989 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2990 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2991 case_WLAN(DISASSOC_LOW_ACK); 2992 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2993 case_WLAN(QSTA_LEAVE_QBSS); 2994 case_WLAN(QSTA_NOT_USE); 2995 case_WLAN(QSTA_REQUIRE_SETUP); 2996 case_WLAN(QSTA_TIMEOUT); 2997 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2998 case_WLAN(MESH_PEER_CANCELED); 2999 case_WLAN(MESH_MAX_PEERS); 3000 case_WLAN(MESH_CONFIG); 3001 case_WLAN(MESH_CLOSE); 3002 case_WLAN(MESH_MAX_RETRIES); 3003 case_WLAN(MESH_CONFIRM_TIMEOUT); 3004 case_WLAN(MESH_INVALID_GTK); 3005 case_WLAN(MESH_INCONSISTENT_PARAM); 3006 case_WLAN(MESH_INVALID_SECURITY); 3007 case_WLAN(MESH_PATH_ERROR); 3008 case_WLAN(MESH_PATH_NOFORWARD); 3009 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3010 case_WLAN(MAC_EXISTS_IN_MBSS); 3011 case_WLAN(MESH_CHAN_REGULATORY); 3012 case_WLAN(MESH_CHAN); 3013 default: return "<unknown>"; 3014 } 3015 } 3016 3017 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3018 struct ieee80211_mgmt *mgmt, size_t len) 3019 { 3020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3021 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3022 3023 sdata_assert_lock(sdata); 3024 3025 if (len < 24 + 2) 3026 return; 3027 3028 if (ifmgd->associated && 3029 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3030 const u8 *bssid = ifmgd->associated->bssid; 3031 3032 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3033 bssid, reason_code, 3034 ieee80211_get_reason_code_string(reason_code)); 3035 3036 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3037 3038 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3039 reason_code); 3040 return; 3041 } 3042 3043 if (ifmgd->assoc_data && 3044 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3045 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3046 3047 sdata_info(sdata, 3048 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3049 bssid, reason_code, 3050 ieee80211_get_reason_code_string(reason_code)); 3051 3052 ieee80211_destroy_assoc_data(sdata, false, true); 3053 3054 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3055 return; 3056 } 3057 } 3058 3059 3060 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3061 struct ieee80211_mgmt *mgmt, size_t len) 3062 { 3063 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3064 u16 reason_code; 3065 3066 sdata_assert_lock(sdata); 3067 3068 if (len < 24 + 2) 3069 return; 3070 3071 if (!ifmgd->associated || 3072 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3073 return; 3074 3075 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3076 3077 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3078 mgmt->sa, reason_code, 3079 ieee80211_get_reason_code_string(reason_code)); 3080 3081 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3082 3083 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 3084 } 3085 3086 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3087 u8 *supp_rates, unsigned int supp_rates_len, 3088 u32 *rates, u32 *basic_rates, 3089 bool *have_higher_than_11mbit, 3090 int *min_rate, int *min_rate_index, 3091 int shift) 3092 { 3093 int i, j; 3094 3095 for (i = 0; i < supp_rates_len; i++) { 3096 int rate = supp_rates[i] & 0x7f; 3097 bool is_basic = !!(supp_rates[i] & 0x80); 3098 3099 if ((rate * 5 * (1 << shift)) > 110) 3100 *have_higher_than_11mbit = true; 3101 3102 /* 3103 * Skip HT and VHT BSS membership selectors since they're not 3104 * rates. 3105 * 3106 * Note: Even though the membership selector and the basic 3107 * rate flag share the same bit, they are not exactly 3108 * the same. 3109 */ 3110 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3111 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 3112 continue; 3113 3114 for (j = 0; j < sband->n_bitrates; j++) { 3115 struct ieee80211_rate *br; 3116 int brate; 3117 3118 br = &sband->bitrates[j]; 3119 3120 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3121 if (brate == rate) { 3122 *rates |= BIT(j); 3123 if (is_basic) 3124 *basic_rates |= BIT(j); 3125 if ((rate * 5) < *min_rate) { 3126 *min_rate = rate * 5; 3127 *min_rate_index = j; 3128 } 3129 break; 3130 } 3131 } 3132 } 3133 } 3134 3135 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3136 const struct ieee802_11_elems *elems) 3137 { 3138 if (elems->ext_capab_len < 10) 3139 return false; 3140 3141 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3142 return false; 3143 3144 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3145 IEEE80211_HE_MAC_CAP0_TWT_RES; 3146 } 3147 3148 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3149 struct cfg80211_bss *cbss, 3150 struct ieee80211_mgmt *mgmt, size_t len) 3151 { 3152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3153 struct ieee80211_local *local = sdata->local; 3154 struct ieee80211_supported_band *sband; 3155 struct sta_info *sta; 3156 u8 *pos; 3157 u16 capab_info, aid; 3158 struct ieee802_11_elems elems; 3159 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3160 const struct cfg80211_bss_ies *bss_ies = NULL; 3161 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3162 u32 changed = 0; 3163 int err; 3164 bool ret; 3165 3166 /* AssocResp and ReassocResp have identical structure */ 3167 3168 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3169 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3170 3171 /* 3172 * The 5 MSB of the AID field are reserved 3173 * (802.11-2016 9.4.1.8 AID field) 3174 */ 3175 aid &= 0x7ff; 3176 3177 ifmgd->broken_ap = false; 3178 3179 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3180 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3181 aid); 3182 aid = 0; 3183 ifmgd->broken_ap = true; 3184 } 3185 3186 pos = mgmt->u.assoc_resp.variable; 3187 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3188 mgmt->bssid, assoc_data->bss->bssid); 3189 3190 if (!elems.supp_rates) { 3191 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3192 return false; 3193 } 3194 3195 ifmgd->aid = aid; 3196 ifmgd->tdls_chan_switch_prohibited = 3197 elems.ext_capab && elems.ext_capab_len >= 5 && 3198 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3199 3200 /* 3201 * Some APs are erroneously not including some information in their 3202 * (re)association response frames. Try to recover by using the data 3203 * from the beacon or probe response. This seems to afflict mobile 3204 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3205 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3206 */ 3207 if ((assoc_data->wmm && !elems.wmm_param) || 3208 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3209 (!elems.ht_cap_elem || !elems.ht_operation)) || 3210 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3211 (!elems.vht_cap_elem || !elems.vht_operation))) { 3212 const struct cfg80211_bss_ies *ies; 3213 struct ieee802_11_elems bss_elems; 3214 3215 rcu_read_lock(); 3216 ies = rcu_dereference(cbss->ies); 3217 if (ies) 3218 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3219 GFP_ATOMIC); 3220 rcu_read_unlock(); 3221 if (!bss_ies) 3222 return false; 3223 3224 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3225 false, &bss_elems, 3226 mgmt->bssid, 3227 assoc_data->bss->bssid); 3228 if (assoc_data->wmm && 3229 !elems.wmm_param && bss_elems.wmm_param) { 3230 elems.wmm_param = bss_elems.wmm_param; 3231 sdata_info(sdata, 3232 "AP bug: WMM param missing from AssocResp\n"); 3233 } 3234 3235 /* 3236 * Also check if we requested HT/VHT, otherwise the AP doesn't 3237 * have to include the IEs in the (re)association response. 3238 */ 3239 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 3240 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3241 elems.ht_cap_elem = bss_elems.ht_cap_elem; 3242 sdata_info(sdata, 3243 "AP bug: HT capability missing from AssocResp\n"); 3244 } 3245 if (!elems.ht_operation && bss_elems.ht_operation && 3246 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3247 elems.ht_operation = bss_elems.ht_operation; 3248 sdata_info(sdata, 3249 "AP bug: HT operation missing from AssocResp\n"); 3250 } 3251 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 3252 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3253 elems.vht_cap_elem = bss_elems.vht_cap_elem; 3254 sdata_info(sdata, 3255 "AP bug: VHT capa missing from AssocResp\n"); 3256 } 3257 if (!elems.vht_operation && bss_elems.vht_operation && 3258 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3259 elems.vht_operation = bss_elems.vht_operation; 3260 sdata_info(sdata, 3261 "AP bug: VHT operation missing from AssocResp\n"); 3262 } 3263 } 3264 3265 /* 3266 * We previously checked these in the beacon/probe response, so 3267 * they should be present here. This is just a safety net. 3268 */ 3269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3270 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 3271 sdata_info(sdata, 3272 "HT AP is missing WMM params or HT capability/operation\n"); 3273 ret = false; 3274 goto out; 3275 } 3276 3277 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3278 (!elems.vht_cap_elem || !elems.vht_operation)) { 3279 sdata_info(sdata, 3280 "VHT AP is missing VHT capability/operation\n"); 3281 ret = false; 3282 goto out; 3283 } 3284 3285 mutex_lock(&sdata->local->sta_mtx); 3286 /* 3287 * station info was already allocated and inserted before 3288 * the association and should be available to us 3289 */ 3290 sta = sta_info_get(sdata, cbss->bssid); 3291 if (WARN_ON(!sta)) { 3292 mutex_unlock(&sdata->local->sta_mtx); 3293 ret = false; 3294 goto out; 3295 } 3296 3297 sband = ieee80211_get_sband(sdata); 3298 if (!sband) { 3299 mutex_unlock(&sdata->local->sta_mtx); 3300 ret = false; 3301 goto out; 3302 } 3303 3304 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3305 (!elems.he_cap || !elems.he_operation)) { 3306 mutex_unlock(&sdata->local->sta_mtx); 3307 sdata_info(sdata, 3308 "HE AP is missing HE capability/operation\n"); 3309 ret = false; 3310 goto out; 3311 } 3312 3313 /* Set up internal HT/VHT capabilities */ 3314 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3315 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3316 elems.ht_cap_elem, sta); 3317 3318 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3319 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3320 elems.vht_cap_elem, sta); 3321 3322 if (elems.he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3323 elems.he_cap) { 3324 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3325 elems.he_cap, 3326 elems.he_cap_len, 3327 sta); 3328 3329 bss_conf->he_support = sta->sta.he_cap.has_he; 3330 bss_conf->twt_requester = 3331 ieee80211_twt_req_supported(sta, &elems); 3332 } else { 3333 bss_conf->he_support = false; 3334 bss_conf->twt_requester = false; 3335 } 3336 3337 if (bss_conf->he_support) { 3338 bss_conf->bss_color = 3339 le32_get_bits(elems.he_operation->he_oper_params, 3340 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3341 3342 bss_conf->htc_trig_based_pkt_ext = 3343 le32_get_bits(elems.he_operation->he_oper_params, 3344 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3345 bss_conf->frame_time_rts_th = 3346 le32_get_bits(elems.he_operation->he_oper_params, 3347 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3348 3349 bss_conf->multi_sta_back_32bit = 3350 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3351 IEEE80211_HE_MAC_CAP2_32BIT_BA_BITMAP; 3352 3353 bss_conf->ack_enabled = 3354 sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3355 IEEE80211_HE_MAC_CAP2_ACK_EN; 3356 3357 bss_conf->uora_exists = !!elems.uora_element; 3358 if (elems.uora_element) 3359 bss_conf->uora_ocw_range = elems.uora_element[0]; 3360 3361 /* TODO: OPEN: what happens if BSS color disable is set? */ 3362 } 3363 3364 if (cbss->transmitted_bss) { 3365 bss_conf->nontransmitted = true; 3366 ether_addr_copy(bss_conf->transmitter_bssid, 3367 cbss->transmitted_bss->bssid); 3368 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3369 bss_conf->bssid_index = cbss->bssid_index; 3370 } 3371 3372 /* 3373 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3374 * in their association response, so ignore that data for our own 3375 * configuration. If it changed since the last beacon, we'll get the 3376 * next beacon and update then. 3377 */ 3378 3379 /* 3380 * If an operating mode notification IE is present, override the 3381 * NSS calculation (that would be done in rate_control_rate_init()) 3382 * and use the # of streams from that element. 3383 */ 3384 if (elems.opmode_notif && 3385 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3386 u8 nss; 3387 3388 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3389 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3390 nss += 1; 3391 sta->sta.rx_nss = nss; 3392 } 3393 3394 rate_control_rate_init(sta); 3395 3396 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3397 set_sta_flag(sta, WLAN_STA_MFP); 3398 sta->sta.mfp = true; 3399 } else { 3400 sta->sta.mfp = false; 3401 } 3402 3403 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3404 3405 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3406 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3407 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3408 if (err) { 3409 sdata_info(sdata, 3410 "failed to move station %pM to desired state\n", 3411 sta->sta.addr); 3412 WARN_ON(__sta_info_destroy(sta)); 3413 mutex_unlock(&sdata->local->sta_mtx); 3414 ret = false; 3415 goto out; 3416 } 3417 3418 mutex_unlock(&sdata->local->sta_mtx); 3419 3420 /* 3421 * Always handle WMM once after association regardless 3422 * of the first value the AP uses. Setting -1 here has 3423 * that effect because the AP values is an unsigned 3424 * 4-bit value. 3425 */ 3426 ifmgd->wmm_last_param_set = -1; 3427 ifmgd->mu_edca_last_param_set = -1; 3428 3429 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3430 ieee80211_set_wmm_default(sdata, false, false); 3431 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3432 elems.wmm_param_len, 3433 elems.mu_edca_param_set)) { 3434 /* still enable QoS since we might have HT/VHT */ 3435 ieee80211_set_wmm_default(sdata, false, true); 3436 /* set the disable-WMM flag in this case to disable 3437 * tracking WMM parameter changes in the beacon if 3438 * the parameters weren't actually valid. Doing so 3439 * avoids changing parameters very strangely when 3440 * the AP is going back and forth between valid and 3441 * invalid parameters. 3442 */ 3443 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3444 } 3445 changed |= BSS_CHANGED_QOS; 3446 3447 if (elems.max_idle_period_ie) { 3448 bss_conf->max_idle_period = 3449 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3450 bss_conf->protected_keep_alive = 3451 !!(elems.max_idle_period_ie->idle_options & 3452 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3453 changed |= BSS_CHANGED_KEEP_ALIVE; 3454 } else { 3455 bss_conf->max_idle_period = 0; 3456 bss_conf->protected_keep_alive = false; 3457 } 3458 3459 /* set AID and assoc capability, 3460 * ieee80211_set_associated() will tell the driver */ 3461 bss_conf->aid = aid; 3462 bss_conf->assoc_capability = capab_info; 3463 ieee80211_set_associated(sdata, cbss, changed); 3464 3465 /* 3466 * If we're using 4-addr mode, let the AP know that we're 3467 * doing so, so that it can create the STA VLAN on its side 3468 */ 3469 if (ifmgd->use_4addr) 3470 ieee80211_send_4addr_nullfunc(local, sdata); 3471 3472 /* 3473 * Start timer to probe the connection to the AP now. 3474 * Also start the timer that will detect beacon loss. 3475 */ 3476 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3477 ieee80211_sta_reset_beacon_monitor(sdata); 3478 3479 ret = true; 3480 out: 3481 kfree(bss_ies); 3482 return ret; 3483 } 3484 3485 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3486 struct ieee80211_mgmt *mgmt, 3487 size_t len) 3488 { 3489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3490 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3491 u16 capab_info, status_code, aid; 3492 struct ieee802_11_elems elems; 3493 int ac, uapsd_queues = -1; 3494 u8 *pos; 3495 bool reassoc; 3496 struct cfg80211_bss *bss; 3497 struct ieee80211_event event = { 3498 .type = MLME_EVENT, 3499 .u.mlme.data = ASSOC_EVENT, 3500 }; 3501 3502 sdata_assert_lock(sdata); 3503 3504 if (!assoc_data) 3505 return; 3506 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3507 return; 3508 3509 /* 3510 * AssocResp and ReassocResp have identical structure, so process both 3511 * of them in this function. 3512 */ 3513 3514 if (len < 24 + 6) 3515 return; 3516 3517 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3518 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3519 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3520 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3521 3522 sdata_info(sdata, 3523 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3524 reassoc ? "Rea" : "A", mgmt->sa, 3525 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3526 3527 if (assoc_data->fils_kek_len && 3528 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3529 return; 3530 3531 pos = mgmt->u.assoc_resp.variable; 3532 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3533 mgmt->bssid, assoc_data->bss->bssid); 3534 3535 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3536 elems.timeout_int && 3537 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3538 u32 tu, ms; 3539 tu = le32_to_cpu(elems.timeout_int->value); 3540 ms = tu * 1024 / 1000; 3541 sdata_info(sdata, 3542 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3543 mgmt->sa, tu, ms); 3544 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3545 assoc_data->timeout_started = true; 3546 if (ms > IEEE80211_ASSOC_TIMEOUT) 3547 run_again(sdata, assoc_data->timeout); 3548 return; 3549 } 3550 3551 bss = assoc_data->bss; 3552 3553 if (status_code != WLAN_STATUS_SUCCESS) { 3554 sdata_info(sdata, "%pM denied association (code=%d)\n", 3555 mgmt->sa, status_code); 3556 ieee80211_destroy_assoc_data(sdata, false, false); 3557 event.u.mlme.status = MLME_DENIED; 3558 event.u.mlme.reason = status_code; 3559 drv_event_callback(sdata->local, sdata, &event); 3560 } else { 3561 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3562 /* oops -- internal error -- send timeout for now */ 3563 ieee80211_destroy_assoc_data(sdata, false, false); 3564 cfg80211_assoc_timeout(sdata->dev, bss); 3565 return; 3566 } 3567 event.u.mlme.status = MLME_SUCCESS; 3568 drv_event_callback(sdata->local, sdata, &event); 3569 sdata_info(sdata, "associated\n"); 3570 3571 /* 3572 * destroy assoc_data afterwards, as otherwise an idle 3573 * recalc after assoc_data is NULL but before associated 3574 * is set can cause the interface to go idle 3575 */ 3576 ieee80211_destroy_assoc_data(sdata, true, false); 3577 3578 /* get uapsd queues configuration */ 3579 uapsd_queues = 0; 3580 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3581 if (sdata->tx_conf[ac].uapsd) 3582 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3583 } 3584 3585 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues, 3586 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3587 } 3588 3589 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3590 struct ieee80211_mgmt *mgmt, size_t len, 3591 struct ieee80211_rx_status *rx_status) 3592 { 3593 struct ieee80211_local *local = sdata->local; 3594 struct ieee80211_bss *bss; 3595 struct ieee80211_channel *channel; 3596 3597 sdata_assert_lock(sdata); 3598 3599 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3600 if (!channel) 3601 return; 3602 3603 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3604 if (bss) { 3605 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3606 ieee80211_rx_bss_put(local, bss); 3607 } 3608 } 3609 3610 3611 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3612 struct sk_buff *skb) 3613 { 3614 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3615 struct ieee80211_if_managed *ifmgd; 3616 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3617 size_t baselen, len = skb->len; 3618 3619 ifmgd = &sdata->u.mgd; 3620 3621 sdata_assert_lock(sdata); 3622 3623 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3624 return; /* ignore ProbeResp to foreign address */ 3625 3626 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3627 if (baselen > len) 3628 return; 3629 3630 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3631 3632 if (ifmgd->associated && 3633 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3634 ieee80211_reset_ap_probe(sdata); 3635 } 3636 3637 /* 3638 * This is the canonical list of information elements we care about, 3639 * the filter code also gives us all changes to the Microsoft OUI 3640 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3641 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3642 * changes to requested client power. 3643 * 3644 * We implement beacon filtering in software since that means we can 3645 * avoid processing the frame here and in cfg80211, and userspace 3646 * will not be able to tell whether the hardware supports it or not. 3647 * 3648 * XXX: This list needs to be dynamic -- userspace needs to be able to 3649 * add items it requires. It also needs to be able to tell us to 3650 * look out for other vendor IEs. 3651 */ 3652 static const u64 care_about_ies = 3653 (1ULL << WLAN_EID_COUNTRY) | 3654 (1ULL << WLAN_EID_ERP_INFO) | 3655 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3656 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3657 (1ULL << WLAN_EID_HT_CAPABILITY) | 3658 (1ULL << WLAN_EID_HT_OPERATION) | 3659 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3660 3661 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3662 struct ieee80211_if_managed *ifmgd, 3663 struct ieee80211_bss_conf *bss_conf, 3664 struct ieee80211_local *local, 3665 struct ieee80211_rx_status *rx_status) 3666 { 3667 /* Track average RSSI from the Beacon frames of the current AP */ 3668 3669 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3670 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3671 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3672 ifmgd->last_cqm_event_signal = 0; 3673 ifmgd->count_beacon_signal = 1; 3674 ifmgd->last_ave_beacon_signal = 0; 3675 } else { 3676 ifmgd->count_beacon_signal++; 3677 } 3678 3679 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3680 3681 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3682 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3683 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3684 int last_sig = ifmgd->last_ave_beacon_signal; 3685 struct ieee80211_event event = { 3686 .type = RSSI_EVENT, 3687 }; 3688 3689 /* 3690 * if signal crosses either of the boundaries, invoke callback 3691 * with appropriate parameters 3692 */ 3693 if (sig > ifmgd->rssi_max_thold && 3694 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3695 ifmgd->last_ave_beacon_signal = sig; 3696 event.u.rssi.data = RSSI_EVENT_HIGH; 3697 drv_event_callback(local, sdata, &event); 3698 } else if (sig < ifmgd->rssi_min_thold && 3699 (last_sig >= ifmgd->rssi_max_thold || 3700 last_sig == 0)) { 3701 ifmgd->last_ave_beacon_signal = sig; 3702 event.u.rssi.data = RSSI_EVENT_LOW; 3703 drv_event_callback(local, sdata, &event); 3704 } 3705 } 3706 3707 if (bss_conf->cqm_rssi_thold && 3708 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3709 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3710 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3711 int last_event = ifmgd->last_cqm_event_signal; 3712 int thold = bss_conf->cqm_rssi_thold; 3713 int hyst = bss_conf->cqm_rssi_hyst; 3714 3715 if (sig < thold && 3716 (last_event == 0 || sig < last_event - hyst)) { 3717 ifmgd->last_cqm_event_signal = sig; 3718 ieee80211_cqm_rssi_notify( 3719 &sdata->vif, 3720 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3721 sig, GFP_KERNEL); 3722 } else if (sig > thold && 3723 (last_event == 0 || sig > last_event + hyst)) { 3724 ifmgd->last_cqm_event_signal = sig; 3725 ieee80211_cqm_rssi_notify( 3726 &sdata->vif, 3727 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3728 sig, GFP_KERNEL); 3729 } 3730 } 3731 3732 if (bss_conf->cqm_rssi_low && 3733 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3734 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3735 int last_event = ifmgd->last_cqm_event_signal; 3736 int low = bss_conf->cqm_rssi_low; 3737 int high = bss_conf->cqm_rssi_high; 3738 3739 if (sig < low && 3740 (last_event == 0 || last_event >= low)) { 3741 ifmgd->last_cqm_event_signal = sig; 3742 ieee80211_cqm_rssi_notify( 3743 &sdata->vif, 3744 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3745 sig, GFP_KERNEL); 3746 } else if (sig > high && 3747 (last_event == 0 || last_event <= high)) { 3748 ifmgd->last_cqm_event_signal = sig; 3749 ieee80211_cqm_rssi_notify( 3750 &sdata->vif, 3751 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3752 sig, GFP_KERNEL); 3753 } 3754 } 3755 } 3756 3757 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3758 struct cfg80211_bss *bss) 3759 { 3760 if (ether_addr_equal(tx_bssid, bss->bssid)) 3761 return true; 3762 if (!bss->transmitted_bss) 3763 return false; 3764 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3765 } 3766 3767 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3768 struct ieee80211_mgmt *mgmt, size_t len, 3769 struct ieee80211_rx_status *rx_status) 3770 { 3771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3772 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3773 size_t baselen; 3774 struct ieee802_11_elems elems; 3775 struct ieee80211_local *local = sdata->local; 3776 struct ieee80211_chanctx_conf *chanctx_conf; 3777 struct ieee80211_channel *chan; 3778 struct sta_info *sta; 3779 u32 changed = 0; 3780 bool erp_valid; 3781 u8 erp_value = 0; 3782 u32 ncrc; 3783 u8 *bssid; 3784 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3785 3786 sdata_assert_lock(sdata); 3787 3788 /* Process beacon from the current BSS */ 3789 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3790 if (baselen > len) 3791 return; 3792 3793 rcu_read_lock(); 3794 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3795 if (!chanctx_conf) { 3796 rcu_read_unlock(); 3797 return; 3798 } 3799 3800 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3801 rcu_read_unlock(); 3802 return; 3803 } 3804 chan = chanctx_conf->def.chan; 3805 rcu_read_unlock(); 3806 3807 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3808 ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->assoc_data->bss)) { 3809 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3810 len - baselen, false, &elems, 3811 mgmt->bssid, 3812 ifmgd->assoc_data->bss->bssid); 3813 3814 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3815 3816 if (elems.dtim_period) 3817 ifmgd->dtim_period = elems.dtim_period; 3818 ifmgd->have_beacon = true; 3819 ifmgd->assoc_data->need_beacon = false; 3820 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3821 sdata->vif.bss_conf.sync_tsf = 3822 le64_to_cpu(mgmt->u.beacon.timestamp); 3823 sdata->vif.bss_conf.sync_device_ts = 3824 rx_status->device_timestamp; 3825 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3826 } 3827 3828 if (elems.mbssid_config_ie) 3829 bss_conf->profile_periodicity = 3830 elems.mbssid_config_ie->profile_periodicity; 3831 3832 if (elems.ext_capab_len >= 11 && 3833 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 3834 bss_conf->ema_ap = true; 3835 3836 /* continue assoc process */ 3837 ifmgd->assoc_data->timeout = jiffies; 3838 ifmgd->assoc_data->timeout_started = true; 3839 run_again(sdata, ifmgd->assoc_data->timeout); 3840 return; 3841 } 3842 3843 if (!ifmgd->associated || 3844 !ieee80211_rx_our_beacon(mgmt->bssid, ifmgd->associated)) 3845 return; 3846 bssid = ifmgd->associated->bssid; 3847 3848 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 3849 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 3850 local, rx_status); 3851 3852 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3853 mlme_dbg_ratelimited(sdata, 3854 "cancelling AP probe due to a received beacon\n"); 3855 ieee80211_reset_ap_probe(sdata); 3856 } 3857 3858 /* 3859 * Push the beacon loss detection into the future since 3860 * we are processing a beacon from the AP just now. 3861 */ 3862 ieee80211_sta_reset_beacon_monitor(sdata); 3863 3864 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3865 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3866 len - baselen, false, &elems, 3867 care_about_ies, ncrc, 3868 mgmt->bssid, bssid); 3869 3870 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3871 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3872 if (local->hw.conf.dynamic_ps_timeout > 0) { 3873 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3874 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3875 ieee80211_hw_config(local, 3876 IEEE80211_CONF_CHANGE_PS); 3877 } 3878 ieee80211_send_nullfunc(local, sdata, false); 3879 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3880 local->pspolling = true; 3881 3882 /* 3883 * Here is assumed that the driver will be 3884 * able to send ps-poll frame and receive a 3885 * response even though power save mode is 3886 * enabled, but some drivers might require 3887 * to disable power save here. This needs 3888 * to be investigated. 3889 */ 3890 ieee80211_send_pspoll(local, sdata); 3891 } 3892 } 3893 3894 if (sdata->vif.p2p || 3895 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3896 struct ieee80211_p2p_noa_attr noa = {}; 3897 int ret; 3898 3899 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3900 len - baselen, 3901 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3902 (u8 *) &noa, sizeof(noa)); 3903 if (ret >= 2) { 3904 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3905 /* valid noa_attr and index changed */ 3906 sdata->u.mgd.p2p_noa_index = noa.index; 3907 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3908 changed |= BSS_CHANGED_P2P_PS; 3909 /* 3910 * make sure we update all information, the CRC 3911 * mechanism doesn't look at P2P attributes. 3912 */ 3913 ifmgd->beacon_crc_valid = false; 3914 } 3915 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3916 /* noa_attr not found and we had valid noa_attr before */ 3917 sdata->u.mgd.p2p_noa_index = -1; 3918 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3919 changed |= BSS_CHANGED_P2P_PS; 3920 ifmgd->beacon_crc_valid = false; 3921 } 3922 } 3923 3924 if (ifmgd->csa_waiting_bcn) 3925 ieee80211_chswitch_post_beacon(sdata); 3926 3927 /* 3928 * Update beacon timing and dtim count on every beacon appearance. This 3929 * will allow the driver to use the most updated values. Do it before 3930 * comparing this one with last received beacon. 3931 * IMPORTANT: These parameters would possibly be out of sync by the time 3932 * the driver will use them. The synchronized view is currently 3933 * guaranteed only in certain callbacks. 3934 */ 3935 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3936 sdata->vif.bss_conf.sync_tsf = 3937 le64_to_cpu(mgmt->u.beacon.timestamp); 3938 sdata->vif.bss_conf.sync_device_ts = 3939 rx_status->device_timestamp; 3940 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 3941 } 3942 3943 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3944 return; 3945 ifmgd->beacon_crc = ncrc; 3946 ifmgd->beacon_crc_valid = true; 3947 3948 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3949 3950 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3951 rx_status->device_timestamp, 3952 &elems, true); 3953 3954 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3955 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3956 elems.wmm_param_len, 3957 elems.mu_edca_param_set)) 3958 changed |= BSS_CHANGED_QOS; 3959 3960 /* 3961 * If we haven't had a beacon before, tell the driver about the 3962 * DTIM period (and beacon timing if desired) now. 3963 */ 3964 if (!ifmgd->have_beacon) { 3965 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3966 bss_conf->dtim_period = elems.dtim_period ?: 1; 3967 3968 changed |= BSS_CHANGED_BEACON_INFO; 3969 ifmgd->have_beacon = true; 3970 3971 mutex_lock(&local->iflist_mtx); 3972 ieee80211_recalc_ps(local); 3973 mutex_unlock(&local->iflist_mtx); 3974 3975 ieee80211_recalc_ps_vif(sdata); 3976 } 3977 3978 if (elems.erp_info) { 3979 erp_valid = true; 3980 erp_value = elems.erp_info[0]; 3981 } else { 3982 erp_valid = false; 3983 } 3984 changed |= ieee80211_handle_bss_capability(sdata, 3985 le16_to_cpu(mgmt->u.beacon.capab_info), 3986 erp_valid, erp_value); 3987 3988 mutex_lock(&local->sta_mtx); 3989 sta = sta_info_get(sdata, bssid); 3990 3991 if (ieee80211_config_bw(sdata, sta, 3992 elems.ht_cap_elem, elems.ht_operation, 3993 elems.vht_operation, elems.he_operation, 3994 bssid, &changed)) { 3995 mutex_unlock(&local->sta_mtx); 3996 sdata_info(sdata, 3997 "failed to follow AP %pM bandwidth change, disconnect\n", 3998 bssid); 3999 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4000 WLAN_REASON_DEAUTH_LEAVING, 4001 true, deauth_buf); 4002 ieee80211_report_disconnect(sdata, deauth_buf, 4003 sizeof(deauth_buf), true, 4004 WLAN_REASON_DEAUTH_LEAVING); 4005 return; 4006 } 4007 4008 if (sta && elems.opmode_notif) 4009 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4010 rx_status->band); 4011 mutex_unlock(&local->sta_mtx); 4012 4013 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4014 elems.country_elem, 4015 elems.country_elem_len, 4016 elems.pwr_constr_elem, 4017 elems.cisco_dtpc_elem); 4018 4019 ieee80211_bss_info_change_notify(sdata, changed); 4020 } 4021 4022 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4023 struct sk_buff *skb) 4024 { 4025 struct ieee80211_rx_status *rx_status; 4026 struct ieee80211_mgmt *mgmt; 4027 u16 fc; 4028 struct ieee802_11_elems elems; 4029 int ies_len; 4030 4031 rx_status = (struct ieee80211_rx_status *) skb->cb; 4032 mgmt = (struct ieee80211_mgmt *) skb->data; 4033 fc = le16_to_cpu(mgmt->frame_control); 4034 4035 sdata_lock(sdata); 4036 4037 switch (fc & IEEE80211_FCTL_STYPE) { 4038 case IEEE80211_STYPE_BEACON: 4039 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 4040 break; 4041 case IEEE80211_STYPE_PROBE_RESP: 4042 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4043 break; 4044 case IEEE80211_STYPE_AUTH: 4045 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4046 break; 4047 case IEEE80211_STYPE_DEAUTH: 4048 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4049 break; 4050 case IEEE80211_STYPE_DISASSOC: 4051 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4052 break; 4053 case IEEE80211_STYPE_ASSOC_RESP: 4054 case IEEE80211_STYPE_REASSOC_RESP: 4055 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4056 break; 4057 case IEEE80211_STYPE_ACTION: 4058 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4059 ies_len = skb->len - 4060 offsetof(struct ieee80211_mgmt, 4061 u.action.u.chan_switch.variable); 4062 4063 if (ies_len < 0) 4064 break; 4065 4066 /* CSA IE cannot be overridden, no need for BSSID */ 4067 ieee802_11_parse_elems( 4068 mgmt->u.action.u.chan_switch.variable, 4069 ies_len, true, &elems, mgmt->bssid, NULL); 4070 4071 if (elems.parse_error) 4072 break; 4073 4074 ieee80211_sta_process_chanswitch(sdata, 4075 rx_status->mactime, 4076 rx_status->device_timestamp, 4077 &elems, false); 4078 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4079 ies_len = skb->len - 4080 offsetof(struct ieee80211_mgmt, 4081 u.action.u.ext_chan_switch.variable); 4082 4083 if (ies_len < 0) 4084 break; 4085 4086 /* 4087 * extended CSA IE can't be overridden, no need for 4088 * BSSID 4089 */ 4090 ieee802_11_parse_elems( 4091 mgmt->u.action.u.ext_chan_switch.variable, 4092 ies_len, true, &elems, mgmt->bssid, NULL); 4093 4094 if (elems.parse_error) 4095 break; 4096 4097 /* for the handling code pretend this was also an IE */ 4098 elems.ext_chansw_ie = 4099 &mgmt->u.action.u.ext_chan_switch.data; 4100 4101 ieee80211_sta_process_chanswitch(sdata, 4102 rx_status->mactime, 4103 rx_status->device_timestamp, 4104 &elems, false); 4105 } 4106 break; 4107 } 4108 sdata_unlock(sdata); 4109 } 4110 4111 static void ieee80211_sta_timer(struct timer_list *t) 4112 { 4113 struct ieee80211_sub_if_data *sdata = 4114 from_timer(sdata, t, u.mgd.timer); 4115 4116 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4117 } 4118 4119 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4120 u8 *bssid, u8 reason, bool tx) 4121 { 4122 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4123 4124 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4125 tx, frame_buf); 4126 4127 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4128 reason); 4129 } 4130 4131 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4132 { 4133 struct ieee80211_local *local = sdata->local; 4134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4135 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4136 u32 tx_flags = 0; 4137 u16 trans = 1; 4138 u16 status = 0; 4139 u16 prepare_tx_duration = 0; 4140 4141 sdata_assert_lock(sdata); 4142 4143 if (WARN_ON_ONCE(!auth_data)) 4144 return -EINVAL; 4145 4146 auth_data->tries++; 4147 4148 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4149 sdata_info(sdata, "authentication with %pM timed out\n", 4150 auth_data->bss->bssid); 4151 4152 /* 4153 * Most likely AP is not in the range so remove the 4154 * bss struct for that AP. 4155 */ 4156 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4157 4158 return -ETIMEDOUT; 4159 } 4160 4161 if (auth_data->algorithm == WLAN_AUTH_SAE) 4162 prepare_tx_duration = 4163 jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4164 4165 drv_mgd_prepare_tx(local, sdata, prepare_tx_duration); 4166 4167 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4168 auth_data->bss->bssid, auth_data->tries, 4169 IEEE80211_AUTH_MAX_TRIES); 4170 4171 auth_data->expected_transaction = 2; 4172 4173 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4174 trans = auth_data->sae_trans; 4175 status = auth_data->sae_status; 4176 auth_data->expected_transaction = trans; 4177 } 4178 4179 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4180 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4181 IEEE80211_TX_INTFL_MLME_CONN_TX; 4182 4183 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4184 auth_data->data, auth_data->data_len, 4185 auth_data->bss->bssid, 4186 auth_data->bss->bssid, NULL, 0, 0, 4187 tx_flags); 4188 4189 if (tx_flags == 0) { 4190 if (auth_data->algorithm == WLAN_AUTH_SAE) 4191 auth_data->timeout = jiffies + 4192 IEEE80211_AUTH_TIMEOUT_SAE; 4193 else 4194 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4195 } else { 4196 auth_data->timeout = 4197 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4198 } 4199 4200 auth_data->timeout_started = true; 4201 run_again(sdata, auth_data->timeout); 4202 4203 return 0; 4204 } 4205 4206 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4207 { 4208 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4209 struct ieee80211_local *local = sdata->local; 4210 4211 sdata_assert_lock(sdata); 4212 4213 assoc_data->tries++; 4214 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4215 sdata_info(sdata, "association with %pM timed out\n", 4216 assoc_data->bss->bssid); 4217 4218 /* 4219 * Most likely AP is not in the range so remove the 4220 * bss struct for that AP. 4221 */ 4222 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4223 4224 return -ETIMEDOUT; 4225 } 4226 4227 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4228 assoc_data->bss->bssid, assoc_data->tries, 4229 IEEE80211_ASSOC_MAX_TRIES); 4230 ieee80211_send_assoc(sdata); 4231 4232 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4233 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4234 assoc_data->timeout_started = true; 4235 run_again(sdata, assoc_data->timeout); 4236 } else { 4237 assoc_data->timeout = 4238 round_jiffies_up(jiffies + 4239 IEEE80211_ASSOC_TIMEOUT_LONG); 4240 assoc_data->timeout_started = true; 4241 run_again(sdata, assoc_data->timeout); 4242 } 4243 4244 return 0; 4245 } 4246 4247 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4248 __le16 fc, bool acked) 4249 { 4250 struct ieee80211_local *local = sdata->local; 4251 4252 sdata->u.mgd.status_fc = fc; 4253 sdata->u.mgd.status_acked = acked; 4254 sdata->u.mgd.status_received = true; 4255 4256 ieee80211_queue_work(&local->hw, &sdata->work); 4257 } 4258 4259 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4260 { 4261 struct ieee80211_local *local = sdata->local; 4262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4263 4264 sdata_lock(sdata); 4265 4266 if (ifmgd->status_received) { 4267 __le16 fc = ifmgd->status_fc; 4268 bool status_acked = ifmgd->status_acked; 4269 4270 ifmgd->status_received = false; 4271 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4272 if (status_acked) { 4273 if (ifmgd->auth_data->algorithm == 4274 WLAN_AUTH_SAE) 4275 ifmgd->auth_data->timeout = 4276 jiffies + 4277 IEEE80211_AUTH_TIMEOUT_SAE; 4278 else 4279 ifmgd->auth_data->timeout = 4280 jiffies + 4281 IEEE80211_AUTH_TIMEOUT_SHORT; 4282 run_again(sdata, ifmgd->auth_data->timeout); 4283 } else { 4284 ifmgd->auth_data->timeout = jiffies - 1; 4285 } 4286 ifmgd->auth_data->timeout_started = true; 4287 } else if (ifmgd->assoc_data && 4288 (ieee80211_is_assoc_req(fc) || 4289 ieee80211_is_reassoc_req(fc))) { 4290 if (status_acked) { 4291 ifmgd->assoc_data->timeout = 4292 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4293 run_again(sdata, ifmgd->assoc_data->timeout); 4294 } else { 4295 ifmgd->assoc_data->timeout = jiffies - 1; 4296 } 4297 ifmgd->assoc_data->timeout_started = true; 4298 } 4299 } 4300 4301 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4302 time_after(jiffies, ifmgd->auth_data->timeout)) { 4303 if (ifmgd->auth_data->done) { 4304 /* 4305 * ok ... we waited for assoc but userspace didn't, 4306 * so let's just kill the auth data 4307 */ 4308 ieee80211_destroy_auth_data(sdata, false); 4309 } else if (ieee80211_auth(sdata)) { 4310 u8 bssid[ETH_ALEN]; 4311 struct ieee80211_event event = { 4312 .type = MLME_EVENT, 4313 .u.mlme.data = AUTH_EVENT, 4314 .u.mlme.status = MLME_TIMEOUT, 4315 }; 4316 4317 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4318 4319 ieee80211_destroy_auth_data(sdata, false); 4320 4321 cfg80211_auth_timeout(sdata->dev, bssid); 4322 drv_event_callback(sdata->local, sdata, &event); 4323 } 4324 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4325 run_again(sdata, ifmgd->auth_data->timeout); 4326 4327 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4328 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4329 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4330 ieee80211_do_assoc(sdata)) { 4331 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4332 struct ieee80211_event event = { 4333 .type = MLME_EVENT, 4334 .u.mlme.data = ASSOC_EVENT, 4335 .u.mlme.status = MLME_TIMEOUT, 4336 }; 4337 4338 ieee80211_destroy_assoc_data(sdata, false, false); 4339 cfg80211_assoc_timeout(sdata->dev, bss); 4340 drv_event_callback(sdata->local, sdata, &event); 4341 } 4342 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4343 run_again(sdata, ifmgd->assoc_data->timeout); 4344 4345 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4346 ifmgd->associated) { 4347 u8 bssid[ETH_ALEN]; 4348 int max_tries; 4349 4350 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4351 4352 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4353 max_tries = max_nullfunc_tries; 4354 else 4355 max_tries = max_probe_tries; 4356 4357 /* ACK received for nullfunc probing frame */ 4358 if (!ifmgd->probe_send_count) 4359 ieee80211_reset_ap_probe(sdata); 4360 else if (ifmgd->nullfunc_failed) { 4361 if (ifmgd->probe_send_count < max_tries) { 4362 mlme_dbg(sdata, 4363 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4364 bssid, ifmgd->probe_send_count, 4365 max_tries); 4366 ieee80211_mgd_probe_ap_send(sdata); 4367 } else { 4368 mlme_dbg(sdata, 4369 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4370 bssid); 4371 ieee80211_sta_connection_lost(sdata, bssid, 4372 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4373 false); 4374 } 4375 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4376 run_again(sdata, ifmgd->probe_timeout); 4377 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4378 mlme_dbg(sdata, 4379 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4380 bssid, probe_wait_ms); 4381 ieee80211_sta_connection_lost(sdata, bssid, 4382 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4383 } else if (ifmgd->probe_send_count < max_tries) { 4384 mlme_dbg(sdata, 4385 "No probe response from AP %pM after %dms, try %d/%i\n", 4386 bssid, probe_wait_ms, 4387 ifmgd->probe_send_count, max_tries); 4388 ieee80211_mgd_probe_ap_send(sdata); 4389 } else { 4390 /* 4391 * We actually lost the connection ... or did we? 4392 * Let's make sure! 4393 */ 4394 mlme_dbg(sdata, 4395 "No probe response from AP %pM after %dms, disconnecting.\n", 4396 bssid, probe_wait_ms); 4397 4398 ieee80211_sta_connection_lost(sdata, bssid, 4399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4400 } 4401 } 4402 4403 sdata_unlock(sdata); 4404 } 4405 4406 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4407 { 4408 struct ieee80211_sub_if_data *sdata = 4409 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4411 4412 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4413 return; 4414 4415 sdata->u.mgd.connection_loss = false; 4416 ieee80211_queue_work(&sdata->local->hw, 4417 &sdata->u.mgd.beacon_connection_loss_work); 4418 } 4419 4420 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4421 { 4422 struct ieee80211_sub_if_data *sdata = 4423 from_timer(sdata, t, u.mgd.conn_mon_timer); 4424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4425 struct ieee80211_local *local = sdata->local; 4426 4427 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4428 return; 4429 4430 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4431 } 4432 4433 static void ieee80211_sta_monitor_work(struct work_struct *work) 4434 { 4435 struct ieee80211_sub_if_data *sdata = 4436 container_of(work, struct ieee80211_sub_if_data, 4437 u.mgd.monitor_work); 4438 4439 ieee80211_mgd_probe_ap(sdata, false); 4440 } 4441 4442 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4443 { 4444 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4445 __ieee80211_stop_poll(sdata); 4446 4447 /* let's probe the connection once */ 4448 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4449 ieee80211_queue_work(&sdata->local->hw, 4450 &sdata->u.mgd.monitor_work); 4451 } 4452 } 4453 4454 #ifdef CONFIG_PM 4455 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4456 { 4457 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4458 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4459 4460 sdata_lock(sdata); 4461 4462 if (ifmgd->auth_data || ifmgd->assoc_data) { 4463 const u8 *bssid = ifmgd->auth_data ? 4464 ifmgd->auth_data->bss->bssid : 4465 ifmgd->assoc_data->bss->bssid; 4466 4467 /* 4468 * If we are trying to authenticate / associate while suspending, 4469 * cfg80211 won't know and won't actually abort those attempts, 4470 * thus we need to do that ourselves. 4471 */ 4472 ieee80211_send_deauth_disassoc(sdata, bssid, 4473 IEEE80211_STYPE_DEAUTH, 4474 WLAN_REASON_DEAUTH_LEAVING, 4475 false, frame_buf); 4476 if (ifmgd->assoc_data) 4477 ieee80211_destroy_assoc_data(sdata, false, true); 4478 if (ifmgd->auth_data) 4479 ieee80211_destroy_auth_data(sdata, false); 4480 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4481 IEEE80211_DEAUTH_FRAME_LEN); 4482 } 4483 4484 /* This is a bit of a hack - we should find a better and more generic 4485 * solution to this. Normally when suspending, cfg80211 will in fact 4486 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4487 * auth (not so important) or assoc (this is the problem) process. 4488 * 4489 * As a consequence, it can happen that we are in the process of both 4490 * associating and suspending, and receive an association response 4491 * after cfg80211 has checked if it needs to disconnect, but before 4492 * we actually set the flag to drop incoming frames. This will then 4493 * cause the workqueue flush to process the association response in 4494 * the suspend, resulting in a successful association just before it 4495 * tries to remove the interface from the driver, which now though 4496 * has a channel context assigned ... this results in issues. 4497 * 4498 * To work around this (for now) simply deauth here again if we're 4499 * now connected. 4500 */ 4501 if (ifmgd->associated && !sdata->local->wowlan) { 4502 u8 bssid[ETH_ALEN]; 4503 struct cfg80211_deauth_request req = { 4504 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4505 .bssid = bssid, 4506 }; 4507 4508 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4509 ieee80211_mgd_deauth(sdata, &req); 4510 } 4511 4512 sdata_unlock(sdata); 4513 } 4514 4515 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4516 { 4517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4518 4519 sdata_lock(sdata); 4520 if (!ifmgd->associated) { 4521 sdata_unlock(sdata); 4522 return; 4523 } 4524 4525 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4526 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4527 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4528 ieee80211_sta_connection_lost(sdata, 4529 ifmgd->associated->bssid, 4530 WLAN_REASON_UNSPECIFIED, 4531 true); 4532 sdata_unlock(sdata); 4533 return; 4534 } 4535 sdata_unlock(sdata); 4536 } 4537 #endif 4538 4539 /* interface setup */ 4540 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4541 { 4542 struct ieee80211_if_managed *ifmgd; 4543 4544 ifmgd = &sdata->u.mgd; 4545 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4546 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4547 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4548 ieee80211_beacon_connection_loss_work); 4549 INIT_WORK(&ifmgd->csa_connection_drop_work, 4550 ieee80211_csa_connection_drop_work); 4551 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4552 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4553 ieee80211_tdls_peer_del_work); 4554 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4555 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4556 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4557 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4558 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4559 ieee80211_sta_handle_tspec_ac_params_wk); 4560 4561 ifmgd->flags = 0; 4562 ifmgd->powersave = sdata->wdev.ps; 4563 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4564 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4565 ifmgd->p2p_noa_index = -1; 4566 4567 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4568 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4569 else 4570 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4571 4572 /* Setup TDLS data */ 4573 spin_lock_init(&ifmgd->teardown_lock); 4574 ifmgd->teardown_skb = NULL; 4575 ifmgd->orig_teardown_skb = NULL; 4576 } 4577 4578 /* scan finished notification */ 4579 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4580 { 4581 struct ieee80211_sub_if_data *sdata; 4582 4583 /* Restart STA timers */ 4584 rcu_read_lock(); 4585 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4586 if (ieee80211_sdata_running(sdata)) 4587 ieee80211_restart_sta_timer(sdata); 4588 } 4589 rcu_read_unlock(); 4590 } 4591 4592 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4593 struct cfg80211_bss *cbss) 4594 { 4595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4596 const u8 *ht_cap_ie, *vht_cap_ie; 4597 const struct ieee80211_ht_cap *ht_cap; 4598 const struct ieee80211_vht_cap *vht_cap; 4599 u8 chains = 1; 4600 4601 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4602 return chains; 4603 4604 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4605 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4606 ht_cap = (void *)(ht_cap_ie + 2); 4607 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4608 /* 4609 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4610 * "Tx Unequal Modulation Supported" fields. 4611 */ 4612 } 4613 4614 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4615 return chains; 4616 4617 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4618 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4619 u8 nss; 4620 u16 tx_mcs_map; 4621 4622 vht_cap = (void *)(vht_cap_ie + 2); 4623 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4624 for (nss = 8; nss > 0; nss--) { 4625 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4626 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4627 break; 4628 } 4629 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4630 chains = max(chains, nss); 4631 } 4632 4633 return chains; 4634 } 4635 4636 static bool 4637 ieee80211_verify_sta_he_mcs_support(struct ieee80211_supported_band *sband, 4638 const struct ieee80211_he_operation *he_op) 4639 { 4640 const struct ieee80211_sta_he_cap *sta_he_cap = 4641 ieee80211_get_he_sta_cap(sband); 4642 u16 ap_min_req_set; 4643 int i; 4644 4645 if (!sta_he_cap || !he_op) 4646 return false; 4647 4648 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4649 4650 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4651 for (i = 0; i < 3; i++) { 4652 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4653 &sta_he_cap->he_mcs_nss_supp; 4654 u16 sta_mcs_map_rx = 4655 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4656 u16 sta_mcs_map_tx = 4657 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4658 u8 nss; 4659 bool verified = true; 4660 4661 /* 4662 * For each band there is a maximum of 8 spatial streams 4663 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4664 * of 2 bits per NSS (1-8), with the values defined in enum 4665 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4666 * capabilities aren't less than the AP's minimum requirements 4667 * for this HE BSS per SS. 4668 * It is enough to find one such band that meets the reqs. 4669 */ 4670 for (nss = 8; nss > 0; nss--) { 4671 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4672 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4673 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4674 4675 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4676 continue; 4677 4678 /* 4679 * Make sure the HE AP doesn't require MCSs that aren't 4680 * supported by the client 4681 */ 4682 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4683 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4684 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4685 verified = false; 4686 break; 4687 } 4688 } 4689 4690 if (verified) 4691 return true; 4692 } 4693 4694 /* If here, STA doesn't meet AP's HE min requirements */ 4695 return false; 4696 } 4697 4698 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4699 struct cfg80211_bss *cbss) 4700 { 4701 struct ieee80211_local *local = sdata->local; 4702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4703 const struct ieee80211_ht_cap *ht_cap = NULL; 4704 const struct ieee80211_ht_operation *ht_oper = NULL; 4705 const struct ieee80211_vht_operation *vht_oper = NULL; 4706 const struct ieee80211_he_operation *he_oper = NULL; 4707 struct ieee80211_supported_band *sband; 4708 struct cfg80211_chan_def chandef; 4709 int ret; 4710 u32 i; 4711 bool have_80mhz; 4712 4713 sband = local->hw.wiphy->bands[cbss->channel->band]; 4714 4715 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4716 IEEE80211_STA_DISABLE_80P80MHZ | 4717 IEEE80211_STA_DISABLE_160MHZ); 4718 4719 rcu_read_lock(); 4720 4721 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4722 sband->ht_cap.ht_supported) { 4723 const u8 *ht_oper_ie, *ht_cap_ie; 4724 4725 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4726 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4727 ht_oper = (void *)(ht_oper_ie + 2); 4728 4729 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4730 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4731 ht_cap = (void *)(ht_cap_ie + 2); 4732 4733 if (!ht_cap) { 4734 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4735 ht_oper = NULL; 4736 } 4737 } 4738 4739 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4740 sband->vht_cap.vht_supported) { 4741 const u8 *vht_oper_ie, *vht_cap; 4742 4743 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4744 WLAN_EID_VHT_OPERATION); 4745 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4746 vht_oper = (void *)(vht_oper_ie + 2); 4747 if (vht_oper && !ht_oper) { 4748 vht_oper = NULL; 4749 sdata_info(sdata, 4750 "AP advertised VHT without HT, disabling both\n"); 4751 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4752 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4753 } 4754 4755 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4756 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4757 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4758 vht_oper = NULL; 4759 } 4760 } 4761 4762 if (!ieee80211_get_he_sta_cap(sband)) 4763 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4764 4765 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 4766 const struct cfg80211_bss_ies *ies; 4767 const u8 *he_oper_ie; 4768 4769 ies = rcu_dereference(cbss->ies); 4770 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 4771 ies->data, ies->len); 4772 if (he_oper_ie && 4773 he_oper_ie[1] == ieee80211_he_oper_size(&he_oper_ie[3])) 4774 he_oper = (void *)(he_oper_ie + 3); 4775 else 4776 he_oper = NULL; 4777 4778 if (!ieee80211_verify_sta_he_mcs_support(sband, he_oper)) 4779 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4780 } 4781 4782 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4783 have_80mhz = false; 4784 for (i = 0; i < sband->n_channels; i++) { 4785 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4786 IEEE80211_CHAN_NO_80MHZ)) 4787 continue; 4788 4789 have_80mhz = true; 4790 break; 4791 } 4792 4793 if (!have_80mhz) 4794 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4795 4796 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4797 cbss->channel, 4798 ht_oper, vht_oper, he_oper, 4799 &chandef, false); 4800 4801 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4802 local->rx_chains); 4803 4804 rcu_read_unlock(); 4805 4806 /* will change later if needed */ 4807 sdata->smps_mode = IEEE80211_SMPS_OFF; 4808 4809 mutex_lock(&local->mtx); 4810 /* 4811 * If this fails (possibly due to channel context sharing 4812 * on incompatible channels, e.g. 80+80 and 160 sharing the 4813 * same control channel) try to use a smaller bandwidth. 4814 */ 4815 ret = ieee80211_vif_use_channel(sdata, &chandef, 4816 IEEE80211_CHANCTX_SHARED); 4817 4818 /* don't downgrade for 5 and 10 MHz channels, though. */ 4819 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4820 chandef.width == NL80211_CHAN_WIDTH_10) 4821 goto out; 4822 4823 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4824 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4825 ret = ieee80211_vif_use_channel(sdata, &chandef, 4826 IEEE80211_CHANCTX_SHARED); 4827 } 4828 out: 4829 mutex_unlock(&local->mtx); 4830 return ret; 4831 } 4832 4833 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 4834 u8 *dtim_count, u8 *dtim_period) 4835 { 4836 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 4837 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 4838 ies->len); 4839 const struct ieee80211_tim_ie *tim = NULL; 4840 const struct ieee80211_bssid_index *idx; 4841 bool valid = tim_ie && tim_ie[1] >= 2; 4842 4843 if (valid) 4844 tim = (void *)(tim_ie + 2); 4845 4846 if (dtim_count) 4847 *dtim_count = valid ? tim->dtim_count : 0; 4848 4849 if (dtim_period) 4850 *dtim_period = valid ? tim->dtim_period : 0; 4851 4852 /* Check if value is overridden by non-transmitted profile */ 4853 if (!idx_ie || idx_ie[1] < 3) 4854 return valid; 4855 4856 idx = (void *)(idx_ie + 2); 4857 4858 if (dtim_count) 4859 *dtim_count = idx->dtim_count; 4860 4861 if (dtim_period) 4862 *dtim_period = idx->dtim_period; 4863 4864 return true; 4865 } 4866 4867 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4868 struct cfg80211_bss *cbss, bool assoc, 4869 bool override) 4870 { 4871 struct ieee80211_local *local = sdata->local; 4872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4873 struct ieee80211_bss *bss = (void *)cbss->priv; 4874 struct sta_info *new_sta = NULL; 4875 struct ieee80211_supported_band *sband; 4876 bool have_sta = false; 4877 int err; 4878 4879 sband = local->hw.wiphy->bands[cbss->channel->band]; 4880 4881 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4882 return -EINVAL; 4883 4884 /* If a reconfig is happening, bail out */ 4885 if (local->in_reconfig) 4886 return -EBUSY; 4887 4888 if (assoc) { 4889 rcu_read_lock(); 4890 have_sta = sta_info_get(sdata, cbss->bssid); 4891 rcu_read_unlock(); 4892 } 4893 4894 if (!have_sta) { 4895 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4896 if (!new_sta) 4897 return -ENOMEM; 4898 } 4899 4900 /* 4901 * Set up the information for the new channel before setting the 4902 * new channel. We can't - completely race-free - change the basic 4903 * rates bitmap and the channel (sband) that it refers to, but if 4904 * we set it up before we at least avoid calling into the driver's 4905 * bss_info_changed() method with invalid information (since we do 4906 * call that from changing the channel - only for IDLE and perhaps 4907 * some others, but ...). 4908 * 4909 * So to avoid that, just set up all the new information before the 4910 * channel, but tell the driver to apply it only afterwards, since 4911 * it might need the new channel for that. 4912 */ 4913 if (new_sta) { 4914 u32 rates = 0, basic_rates = 0; 4915 bool have_higher_than_11mbit; 4916 int min_rate = INT_MAX, min_rate_index = -1; 4917 const struct cfg80211_bss_ies *ies; 4918 int shift = ieee80211_vif_get_shift(&sdata->vif); 4919 4920 ieee80211_get_rates(sband, bss->supp_rates, 4921 bss->supp_rates_len, 4922 &rates, &basic_rates, 4923 &have_higher_than_11mbit, 4924 &min_rate, &min_rate_index, 4925 shift); 4926 4927 /* 4928 * This used to be a workaround for basic rates missing 4929 * in the association response frame. Now that we no 4930 * longer use the basic rates from there, it probably 4931 * doesn't happen any more, but keep the workaround so 4932 * in case some *other* APs are buggy in different ways 4933 * we can connect -- with a warning. 4934 */ 4935 if (!basic_rates && min_rate_index >= 0) { 4936 sdata_info(sdata, 4937 "No basic rates, using min rate instead\n"); 4938 basic_rates = BIT(min_rate_index); 4939 } 4940 4941 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4942 sdata->vif.bss_conf.basic_rates = basic_rates; 4943 4944 /* cf. IEEE 802.11 9.2.12 */ 4945 if (cbss->channel->band == NL80211_BAND_2GHZ && 4946 have_higher_than_11mbit) 4947 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4948 else 4949 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4950 4951 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4952 4953 /* set timing information */ 4954 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4955 rcu_read_lock(); 4956 ies = rcu_dereference(cbss->beacon_ies); 4957 if (ies) { 4958 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4959 sdata->vif.bss_conf.sync_device_ts = 4960 bss->device_ts_beacon; 4961 4962 ieee80211_get_dtim(ies, 4963 &sdata->vif.bss_conf.sync_dtim_count, 4964 NULL); 4965 } else if (!ieee80211_hw_check(&sdata->local->hw, 4966 TIMING_BEACON_ONLY)) { 4967 ies = rcu_dereference(cbss->proberesp_ies); 4968 /* must be non-NULL since beacon IEs were NULL */ 4969 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4970 sdata->vif.bss_conf.sync_device_ts = 4971 bss->device_ts_presp; 4972 sdata->vif.bss_conf.sync_dtim_count = 0; 4973 } else { 4974 sdata->vif.bss_conf.sync_tsf = 0; 4975 sdata->vif.bss_conf.sync_device_ts = 0; 4976 sdata->vif.bss_conf.sync_dtim_count = 0; 4977 } 4978 rcu_read_unlock(); 4979 } 4980 4981 if (new_sta || override) { 4982 err = ieee80211_prep_channel(sdata, cbss); 4983 if (err) { 4984 if (new_sta) 4985 sta_info_free(local, new_sta); 4986 return -EINVAL; 4987 } 4988 } 4989 4990 if (new_sta) { 4991 /* 4992 * tell driver about BSSID, basic rates and timing 4993 * this was set up above, before setting the channel 4994 */ 4995 ieee80211_bss_info_change_notify(sdata, 4996 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4997 BSS_CHANGED_BEACON_INT); 4998 4999 if (assoc) 5000 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5001 5002 err = sta_info_insert(new_sta); 5003 new_sta = NULL; 5004 if (err) { 5005 sdata_info(sdata, 5006 "failed to insert STA entry for the AP (error %d)\n", 5007 err); 5008 return err; 5009 } 5010 } else 5011 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5012 5013 /* Cancel scan to ensure that nothing interferes with connection */ 5014 if (local->scanning) 5015 ieee80211_scan_cancel(local); 5016 5017 return 0; 5018 } 5019 5020 /* config hooks */ 5021 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5022 struct cfg80211_auth_request *req) 5023 { 5024 struct ieee80211_local *local = sdata->local; 5025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5026 struct ieee80211_mgd_auth_data *auth_data; 5027 u16 auth_alg; 5028 int err; 5029 bool cont_auth; 5030 5031 /* prepare auth data structure */ 5032 5033 switch (req->auth_type) { 5034 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5035 auth_alg = WLAN_AUTH_OPEN; 5036 break; 5037 case NL80211_AUTHTYPE_SHARED_KEY: 5038 if (IS_ERR(local->wep_tx_tfm)) 5039 return -EOPNOTSUPP; 5040 auth_alg = WLAN_AUTH_SHARED_KEY; 5041 break; 5042 case NL80211_AUTHTYPE_FT: 5043 auth_alg = WLAN_AUTH_FT; 5044 break; 5045 case NL80211_AUTHTYPE_NETWORK_EAP: 5046 auth_alg = WLAN_AUTH_LEAP; 5047 break; 5048 case NL80211_AUTHTYPE_SAE: 5049 auth_alg = WLAN_AUTH_SAE; 5050 break; 5051 case NL80211_AUTHTYPE_FILS_SK: 5052 auth_alg = WLAN_AUTH_FILS_SK; 5053 break; 5054 case NL80211_AUTHTYPE_FILS_SK_PFS: 5055 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5056 break; 5057 case NL80211_AUTHTYPE_FILS_PK: 5058 auth_alg = WLAN_AUTH_FILS_PK; 5059 break; 5060 default: 5061 return -EOPNOTSUPP; 5062 } 5063 5064 if (ifmgd->assoc_data) 5065 return -EBUSY; 5066 5067 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5068 req->ie_len, GFP_KERNEL); 5069 if (!auth_data) 5070 return -ENOMEM; 5071 5072 auth_data->bss = req->bss; 5073 5074 if (req->auth_data_len >= 4) { 5075 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5076 __le16 *pos = (__le16 *) req->auth_data; 5077 5078 auth_data->sae_trans = le16_to_cpu(pos[0]); 5079 auth_data->sae_status = le16_to_cpu(pos[1]); 5080 } 5081 memcpy(auth_data->data, req->auth_data + 4, 5082 req->auth_data_len - 4); 5083 auth_data->data_len += req->auth_data_len - 4; 5084 } 5085 5086 /* Check if continuing authentication or trying to authenticate with the 5087 * same BSS that we were in the process of authenticating with and avoid 5088 * removal and re-addition of the STA entry in 5089 * ieee80211_prep_connection(). 5090 */ 5091 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5092 5093 if (req->ie && req->ie_len) { 5094 memcpy(&auth_data->data[auth_data->data_len], 5095 req->ie, req->ie_len); 5096 auth_data->data_len += req->ie_len; 5097 } 5098 5099 if (req->key && req->key_len) { 5100 auth_data->key_len = req->key_len; 5101 auth_data->key_idx = req->key_idx; 5102 memcpy(auth_data->key, req->key, req->key_len); 5103 } 5104 5105 auth_data->algorithm = auth_alg; 5106 5107 /* try to authenticate/probe */ 5108 5109 if (ifmgd->auth_data) { 5110 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5111 auth_data->peer_confirmed = 5112 ifmgd->auth_data->peer_confirmed; 5113 } 5114 ieee80211_destroy_auth_data(sdata, cont_auth); 5115 } 5116 5117 /* prep auth_data so we don't go into idle on disassoc */ 5118 ifmgd->auth_data = auth_data; 5119 5120 /* If this is continuation of an ongoing SAE authentication exchange 5121 * (i.e., request to send SAE Confirm) and the peer has already 5122 * confirmed, mark authentication completed since we are about to send 5123 * out SAE Confirm. 5124 */ 5125 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5126 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5127 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5128 5129 if (ifmgd->associated) { 5130 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5131 5132 sdata_info(sdata, 5133 "disconnect from AP %pM for new auth to %pM\n", 5134 ifmgd->associated->bssid, req->bss->bssid); 5135 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5136 WLAN_REASON_UNSPECIFIED, 5137 false, frame_buf); 5138 5139 ieee80211_report_disconnect(sdata, frame_buf, 5140 sizeof(frame_buf), true, 5141 WLAN_REASON_UNSPECIFIED); 5142 } 5143 5144 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5145 5146 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5147 if (err) 5148 goto err_clear; 5149 5150 err = ieee80211_auth(sdata); 5151 if (err) { 5152 sta_info_destroy_addr(sdata, req->bss->bssid); 5153 goto err_clear; 5154 } 5155 5156 /* hold our own reference */ 5157 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5158 return 0; 5159 5160 err_clear: 5161 eth_zero_addr(ifmgd->bssid); 5162 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5163 ifmgd->auth_data = NULL; 5164 mutex_lock(&sdata->local->mtx); 5165 ieee80211_vif_release_channel(sdata); 5166 mutex_unlock(&sdata->local->mtx); 5167 kfree(auth_data); 5168 return err; 5169 } 5170 5171 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5172 struct cfg80211_assoc_request *req) 5173 { 5174 struct ieee80211_local *local = sdata->local; 5175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5176 struct ieee80211_bss *bss = (void *)req->bss->priv; 5177 struct ieee80211_mgd_assoc_data *assoc_data; 5178 const struct cfg80211_bss_ies *beacon_ies; 5179 struct ieee80211_supported_band *sband; 5180 const u8 *ssidie, *ht_ie, *vht_ie; 5181 int i, err; 5182 bool override = false; 5183 5184 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5185 if (!assoc_data) 5186 return -ENOMEM; 5187 5188 rcu_read_lock(); 5189 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5190 if (!ssidie) { 5191 rcu_read_unlock(); 5192 kfree(assoc_data); 5193 return -EINVAL; 5194 } 5195 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5196 assoc_data->ssid_len = ssidie[1]; 5197 rcu_read_unlock(); 5198 5199 if (ifmgd->associated) { 5200 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5201 5202 sdata_info(sdata, 5203 "disconnect from AP %pM for new assoc to %pM\n", 5204 ifmgd->associated->bssid, req->bss->bssid); 5205 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5206 WLAN_REASON_UNSPECIFIED, 5207 false, frame_buf); 5208 5209 ieee80211_report_disconnect(sdata, frame_buf, 5210 sizeof(frame_buf), true, 5211 WLAN_REASON_UNSPECIFIED); 5212 } 5213 5214 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5215 err = -EBUSY; 5216 goto err_free; 5217 } 5218 5219 if (ifmgd->assoc_data) { 5220 err = -EBUSY; 5221 goto err_free; 5222 } 5223 5224 if (ifmgd->auth_data) { 5225 bool match; 5226 5227 /* keep sta info, bssid if matching */ 5228 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5229 ieee80211_destroy_auth_data(sdata, match); 5230 } 5231 5232 /* prepare assoc data */ 5233 5234 ifmgd->beacon_crc_valid = false; 5235 5236 assoc_data->wmm = bss->wmm_used && 5237 (local->hw.queues >= IEEE80211_NUM_ACS); 5238 5239 /* 5240 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5241 * We still associate in non-HT mode (11a/b/g) if any one of these 5242 * ciphers is configured as pairwise. 5243 * We can set this to true for non-11n hardware, that'll be checked 5244 * separately along with the peer capabilities. 5245 */ 5246 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5247 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5248 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5249 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5250 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5251 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5252 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5253 netdev_info(sdata->dev, 5254 "disabling HE/HT/VHT due to WEP/TKIP use\n"); 5255 } 5256 } 5257 5258 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 5259 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5260 if (!sband->ht_cap.ht_supported || 5261 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5262 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5263 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5264 if (!bss->wmm_used && 5265 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5266 netdev_info(sdata->dev, 5267 "disabling HT as WMM/QoS is not supported by the AP\n"); 5268 } 5269 5270 /* disable VHT if we don't support it or the AP doesn't use WMM */ 5271 if (!sband->vht_cap.vht_supported || 5272 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 5273 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 5274 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5275 if (!bss->wmm_used && 5276 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 5277 netdev_info(sdata->dev, 5278 "disabling VHT as WMM/QoS is not supported by the AP\n"); 5279 } 5280 5281 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5282 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5283 sizeof(ifmgd->ht_capa_mask)); 5284 5285 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5286 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5287 sizeof(ifmgd->vht_capa_mask)); 5288 5289 if (req->ie && req->ie_len) { 5290 memcpy(assoc_data->ie, req->ie, req->ie_len); 5291 assoc_data->ie_len = req->ie_len; 5292 } 5293 5294 if (req->fils_kek) { 5295 /* should already be checked in cfg80211 - so warn */ 5296 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5297 err = -EINVAL; 5298 goto err_free; 5299 } 5300 memcpy(assoc_data->fils_kek, req->fils_kek, 5301 req->fils_kek_len); 5302 assoc_data->fils_kek_len = req->fils_kek_len; 5303 } 5304 5305 if (req->fils_nonces) 5306 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5307 2 * FILS_NONCE_LEN); 5308 5309 assoc_data->bss = req->bss; 5310 5311 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5312 if (ifmgd->powersave) 5313 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5314 else 5315 sdata->smps_mode = IEEE80211_SMPS_OFF; 5316 } else 5317 sdata->smps_mode = ifmgd->req_smps; 5318 5319 assoc_data->capability = req->bss->capability; 5320 assoc_data->supp_rates = bss->supp_rates; 5321 assoc_data->supp_rates_len = bss->supp_rates_len; 5322 5323 rcu_read_lock(); 5324 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5325 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5326 assoc_data->ap_ht_param = 5327 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5328 else 5329 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5330 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5331 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5332 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5333 sizeof(struct ieee80211_vht_cap)); 5334 else 5335 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5336 rcu_read_unlock(); 5337 5338 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5339 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5340 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5341 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5342 5343 if (bss->wmm_used && bss->uapsd_supported && 5344 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5345 assoc_data->uapsd = true; 5346 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5347 } else { 5348 assoc_data->uapsd = false; 5349 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5350 } 5351 5352 if (req->prev_bssid) 5353 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5354 5355 if (req->use_mfp) { 5356 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5357 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5358 } else { 5359 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5360 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5361 } 5362 5363 if (req->flags & ASSOC_REQ_USE_RRM) 5364 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5365 else 5366 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5367 5368 if (req->crypto.control_port) 5369 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5370 else 5371 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5372 5373 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5374 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5375 sdata->control_port_over_nl80211 = 5376 req->crypto.control_port_over_nl80211; 5377 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5378 sdata->vif.type); 5379 5380 /* kick off associate process */ 5381 5382 ifmgd->assoc_data = assoc_data; 5383 ifmgd->dtim_period = 0; 5384 ifmgd->have_beacon = false; 5385 5386 /* override HT/VHT configuration only if the AP and we support it */ 5387 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5388 struct ieee80211_sta_ht_cap sta_ht_cap; 5389 5390 if (req->flags & ASSOC_REQ_DISABLE_HT) 5391 override = true; 5392 5393 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5394 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5395 5396 /* check for 40 MHz disable override */ 5397 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5398 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5399 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5400 override = true; 5401 5402 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5403 req->flags & ASSOC_REQ_DISABLE_VHT) 5404 override = true; 5405 } 5406 5407 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5408 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5409 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5410 } 5411 5412 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5413 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5414 5415 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5416 if (err) 5417 goto err_clear; 5418 5419 rcu_read_lock(); 5420 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5421 5422 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5423 !beacon_ies) { 5424 /* 5425 * Wait up to one beacon interval ... 5426 * should this be more if we miss one? 5427 */ 5428 sdata_info(sdata, "waiting for beacon from %pM\n", 5429 ifmgd->bssid); 5430 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5431 assoc_data->timeout_started = true; 5432 assoc_data->need_beacon = true; 5433 } else if (beacon_ies) { 5434 const u8 *ie; 5435 u8 dtim_count = 0; 5436 5437 ieee80211_get_dtim(beacon_ies, &dtim_count, 5438 &ifmgd->dtim_period); 5439 5440 ifmgd->have_beacon = true; 5441 assoc_data->timeout = jiffies; 5442 assoc_data->timeout_started = true; 5443 5444 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5445 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5446 sdata->vif.bss_conf.sync_device_ts = 5447 bss->device_ts_beacon; 5448 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5449 } 5450 5451 ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5452 beacon_ies->data, beacon_ies->len); 5453 if (ie && ie[1] >= 3) 5454 sdata->vif.bss_conf.profile_periodicity = ie[4]; 5455 5456 ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, 5457 beacon_ies->data, beacon_ies->len); 5458 if (ie && ie[1] >= 11 && 5459 (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5460 sdata->vif.bss_conf.ema_ap = true; 5461 } else { 5462 assoc_data->timeout = jiffies; 5463 assoc_data->timeout_started = true; 5464 } 5465 rcu_read_unlock(); 5466 5467 run_again(sdata, assoc_data->timeout); 5468 5469 if (bss->corrupt_data) { 5470 char *corrupt_type = "data"; 5471 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5472 if (bss->corrupt_data & 5473 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5474 corrupt_type = "beacon and probe response"; 5475 else 5476 corrupt_type = "beacon"; 5477 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5478 corrupt_type = "probe response"; 5479 sdata_info(sdata, "associating with AP with corrupt %s\n", 5480 corrupt_type); 5481 } 5482 5483 return 0; 5484 err_clear: 5485 eth_zero_addr(ifmgd->bssid); 5486 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5487 ifmgd->assoc_data = NULL; 5488 err_free: 5489 kfree(assoc_data); 5490 return err; 5491 } 5492 5493 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5494 struct cfg80211_deauth_request *req) 5495 { 5496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5497 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5498 bool tx = !req->local_state_change; 5499 5500 if (ifmgd->auth_data && 5501 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5502 sdata_info(sdata, 5503 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5504 req->bssid, req->reason_code, 5505 ieee80211_get_reason_code_string(req->reason_code)); 5506 5507 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5508 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5509 IEEE80211_STYPE_DEAUTH, 5510 req->reason_code, tx, 5511 frame_buf); 5512 ieee80211_destroy_auth_data(sdata, false); 5513 ieee80211_report_disconnect(sdata, frame_buf, 5514 sizeof(frame_buf), true, 5515 req->reason_code); 5516 5517 return 0; 5518 } 5519 5520 if (ifmgd->assoc_data && 5521 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5522 sdata_info(sdata, 5523 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5524 req->bssid, req->reason_code, 5525 ieee80211_get_reason_code_string(req->reason_code)); 5526 5527 drv_mgd_prepare_tx(sdata->local, sdata, 0); 5528 ieee80211_send_deauth_disassoc(sdata, req->bssid, 5529 IEEE80211_STYPE_DEAUTH, 5530 req->reason_code, tx, 5531 frame_buf); 5532 ieee80211_destroy_assoc_data(sdata, false, true); 5533 ieee80211_report_disconnect(sdata, frame_buf, 5534 sizeof(frame_buf), true, 5535 req->reason_code); 5536 return 0; 5537 } 5538 5539 if (ifmgd->associated && 5540 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5541 sdata_info(sdata, 5542 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5543 req->bssid, req->reason_code, 5544 ieee80211_get_reason_code_string(req->reason_code)); 5545 5546 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5547 req->reason_code, tx, frame_buf); 5548 ieee80211_report_disconnect(sdata, frame_buf, 5549 sizeof(frame_buf), true, 5550 req->reason_code); 5551 return 0; 5552 } 5553 5554 return -ENOTCONN; 5555 } 5556 5557 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5558 struct cfg80211_disassoc_request *req) 5559 { 5560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5561 u8 bssid[ETH_ALEN]; 5562 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5563 5564 /* 5565 * cfg80211 should catch this ... but it's racy since 5566 * we can receive a disassoc frame, process it, hand it 5567 * to cfg80211 while that's in a locked section already 5568 * trying to tell us that the user wants to disconnect. 5569 */ 5570 if (ifmgd->associated != req->bss) 5571 return -ENOLINK; 5572 5573 sdata_info(sdata, 5574 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5575 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5576 5577 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5578 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5579 req->reason_code, !req->local_state_change, 5580 frame_buf); 5581 5582 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5583 req->reason_code); 5584 5585 return 0; 5586 } 5587 5588 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5589 { 5590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5591 5592 /* 5593 * Make sure some work items will not run after this, 5594 * they will not do anything but might not have been 5595 * cancelled when disconnecting. 5596 */ 5597 cancel_work_sync(&ifmgd->monitor_work); 5598 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5599 cancel_work_sync(&ifmgd->request_smps_work); 5600 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5601 cancel_work_sync(&ifmgd->chswitch_work); 5602 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5603 5604 sdata_lock(sdata); 5605 if (ifmgd->assoc_data) { 5606 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5607 ieee80211_destroy_assoc_data(sdata, false, false); 5608 cfg80211_assoc_timeout(sdata->dev, bss); 5609 } 5610 if (ifmgd->auth_data) 5611 ieee80211_destroy_auth_data(sdata, false); 5612 spin_lock_bh(&ifmgd->teardown_lock); 5613 if (ifmgd->teardown_skb) { 5614 kfree_skb(ifmgd->teardown_skb); 5615 ifmgd->teardown_skb = NULL; 5616 ifmgd->orig_teardown_skb = NULL; 5617 } 5618 kfree(ifmgd->assoc_req_ies); 5619 ifmgd->assoc_req_ies = NULL; 5620 ifmgd->assoc_req_ies_len = 0; 5621 spin_unlock_bh(&ifmgd->teardown_lock); 5622 del_timer_sync(&ifmgd->timer); 5623 sdata_unlock(sdata); 5624 } 5625 5626 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5627 enum nl80211_cqm_rssi_threshold_event rssi_event, 5628 s32 rssi_level, 5629 gfp_t gfp) 5630 { 5631 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5632 5633 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5634 5635 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5636 } 5637 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5638 5639 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5640 { 5641 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5642 5643 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5644 5645 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5646 } 5647 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5648