1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/delay.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/etherdevice.h> 21 #include <linux/moduleparam.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 #include "fils_aead.h" 34 35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_operation *ht_oper, 149 const struct ieee80211_vht_operation *vht_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 (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 210 sdata_info(sdata, 211 "AP VHT information is invalid, disable VHT\n"); 212 ret = IEEE80211_STA_DISABLE_VHT; 213 goto out; 214 } 215 216 if (!cfg80211_chandef_valid(&vht_chandef)) { 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 218 sdata_info(sdata, 219 "AP VHT information is invalid, disable VHT\n"); 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 225 ret = 0; 226 goto out; 227 } 228 229 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 230 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 231 sdata_info(sdata, 232 "AP VHT information doesn't match HT, disable VHT\n"); 233 ret = IEEE80211_STA_DISABLE_VHT; 234 goto out; 235 } 236 237 *chandef = vht_chandef; 238 239 ret = 0; 240 241 out: 242 /* 243 * When tracking the current AP, don't do any further checks if the 244 * new chandef is identical to the one we're currently using for the 245 * connection. This keeps us from playing ping-pong with regulatory, 246 * without it the following can happen (for example): 247 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 248 * - AP advertises regdom US 249 * - CRDA loads regdom US with 80 MHz prohibited (old database) 250 * - the code below detects an unsupported channel, downgrades, and 251 * we disconnect from the AP in the caller 252 * - disconnect causes CRDA to reload world regdomain and the game 253 * starts anew. 254 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 255 * 256 * It seems possible that there are still scenarios with CSA or real 257 * bandwidth changes where a this could happen, but those cases are 258 * less common and wouldn't completely prevent using the AP. 259 */ 260 if (tracking && 261 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 262 return ret; 263 264 /* don't print the message below for VHT mismatch if VHT is disabled */ 265 if (ret & IEEE80211_STA_DISABLE_VHT) 266 vht_chandef = *chandef; 267 268 /* 269 * Ignore the DISABLED flag when we're already connected and only 270 * tracking the APs beacon for bandwidth changes - otherwise we 271 * might get disconnected here if we connect to an AP, update our 272 * regulatory information based on the AP's country IE and the 273 * information we have is wrong/outdated and disables the channel 274 * that we're actually using for the connection to the AP. 275 */ 276 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 277 tracking ? 0 : 278 IEEE80211_CHAN_DISABLED)) { 279 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 280 ret = IEEE80211_STA_DISABLE_HT | 281 IEEE80211_STA_DISABLE_VHT; 282 break; 283 } 284 285 ret |= ieee80211_chandef_downgrade(chandef); 286 } 287 288 if (chandef->width != vht_chandef.width && !tracking) 289 sdata_info(sdata, 290 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 291 292 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 293 return ret; 294 } 295 296 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 297 struct sta_info *sta, 298 const struct ieee80211_ht_cap *ht_cap, 299 const struct ieee80211_ht_operation *ht_oper, 300 const struct ieee80211_vht_operation *vht_oper, 301 const u8 *bssid, u32 *changed) 302 { 303 struct ieee80211_local *local = sdata->local; 304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 305 struct ieee80211_supported_band *sband; 306 struct ieee80211_channel *chan; 307 struct cfg80211_chan_def chandef; 308 u16 ht_opmode; 309 u32 flags; 310 enum ieee80211_sta_rx_bandwidth new_sta_bw; 311 int ret; 312 313 /* if HT was/is disabled, don't track any bandwidth changes */ 314 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 315 return 0; 316 317 /* don't check VHT if we associated as non-VHT station */ 318 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 319 vht_oper = NULL; 320 321 if (WARN_ON_ONCE(!sta)) 322 return -EINVAL; 323 324 /* 325 * if bss configuration changed store the new one - 326 * this may be applicable even if channel is identical 327 */ 328 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 329 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 330 *changed |= BSS_CHANGED_HT; 331 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 332 } 333 334 chan = sdata->vif.bss_conf.chandef.chan; 335 sband = local->hw.wiphy->bands[chan->band]; 336 337 /* calculate new channel (type) based on HT/VHT operation IEs */ 338 flags = ieee80211_determine_chantype(sdata, sband, chan, 339 ht_oper, vht_oper, 340 &chandef, true); 341 342 /* 343 * Downgrade the new channel if we associated with restricted 344 * capabilities. For example, if we associated as a 20 MHz STA 345 * to a 40 MHz AP (due to regulatory, capabilities or config 346 * reasons) then switching to a 40 MHz channel now won't do us 347 * any good -- we couldn't use it with the AP. 348 */ 349 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 350 chandef.width == NL80211_CHAN_WIDTH_80P80) 351 flags |= ieee80211_chandef_downgrade(&chandef); 352 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 353 chandef.width == NL80211_CHAN_WIDTH_160) 354 flags |= ieee80211_chandef_downgrade(&chandef); 355 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 356 chandef.width > NL80211_CHAN_WIDTH_20) 357 flags |= ieee80211_chandef_downgrade(&chandef); 358 359 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 360 return 0; 361 362 sdata_info(sdata, 363 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 364 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 365 chandef.center_freq1, chandef.center_freq2); 366 367 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 368 IEEE80211_STA_DISABLE_VHT | 369 IEEE80211_STA_DISABLE_40MHZ | 370 IEEE80211_STA_DISABLE_80P80MHZ | 371 IEEE80211_STA_DISABLE_160MHZ)) || 372 !cfg80211_chandef_valid(&chandef)) { 373 sdata_info(sdata, 374 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 375 ifmgd->bssid); 376 return -EINVAL; 377 } 378 379 switch (chandef.width) { 380 case NL80211_CHAN_WIDTH_20_NOHT: 381 case NL80211_CHAN_WIDTH_20: 382 new_sta_bw = IEEE80211_STA_RX_BW_20; 383 break; 384 case NL80211_CHAN_WIDTH_40: 385 new_sta_bw = IEEE80211_STA_RX_BW_40; 386 break; 387 case NL80211_CHAN_WIDTH_80: 388 new_sta_bw = IEEE80211_STA_RX_BW_80; 389 break; 390 case NL80211_CHAN_WIDTH_80P80: 391 case NL80211_CHAN_WIDTH_160: 392 new_sta_bw = IEEE80211_STA_RX_BW_160; 393 break; 394 default: 395 return -EINVAL; 396 } 397 398 if (new_sta_bw > sta->cur_max_bandwidth) 399 new_sta_bw = sta->cur_max_bandwidth; 400 401 if (new_sta_bw < sta->sta.bandwidth) { 402 sta->sta.bandwidth = new_sta_bw; 403 rate_control_rate_update(local, sband, sta, 404 IEEE80211_RC_BW_CHANGED); 405 } 406 407 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 408 if (ret) { 409 sdata_info(sdata, 410 "AP %pM changed bandwidth to incompatible one - disconnect\n", 411 ifmgd->bssid); 412 return ret; 413 } 414 415 if (new_sta_bw > sta->sta.bandwidth) { 416 sta->sta.bandwidth = new_sta_bw; 417 rate_control_rate_update(local, sband, sta, 418 IEEE80211_RC_BW_CHANGED); 419 } 420 421 return 0; 422 } 423 424 /* frame sending functions */ 425 426 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 427 struct sk_buff *skb, u8 ap_ht_param, 428 struct ieee80211_supported_band *sband, 429 struct ieee80211_channel *channel, 430 enum ieee80211_smps_mode smps) 431 { 432 u8 *pos; 433 u32 flags = channel->flags; 434 u16 cap; 435 struct ieee80211_sta_ht_cap ht_cap; 436 437 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 438 439 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 440 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 441 442 /* determine capability flags */ 443 cap = ht_cap.cap; 444 445 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 446 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 447 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 448 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 449 cap &= ~IEEE80211_HT_CAP_SGI_40; 450 } 451 break; 452 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 453 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 455 cap &= ~IEEE80211_HT_CAP_SGI_40; 456 } 457 break; 458 } 459 460 /* 461 * If 40 MHz was disabled associate as though we weren't 462 * capable of 40 MHz -- some broken APs will never fall 463 * back to trying to transmit in 20 MHz. 464 */ 465 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 466 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 467 cap &= ~IEEE80211_HT_CAP_SGI_40; 468 } 469 470 /* set SM PS mode properly */ 471 cap &= ~IEEE80211_HT_CAP_SM_PS; 472 switch (smps) { 473 case IEEE80211_SMPS_AUTOMATIC: 474 case IEEE80211_SMPS_NUM_MODES: 475 WARN_ON(1); 476 /* fall through */ 477 case IEEE80211_SMPS_OFF: 478 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 479 IEEE80211_HT_CAP_SM_PS_SHIFT; 480 break; 481 case IEEE80211_SMPS_STATIC: 482 cap |= WLAN_HT_CAP_SM_PS_STATIC << 483 IEEE80211_HT_CAP_SM_PS_SHIFT; 484 break; 485 case IEEE80211_SMPS_DYNAMIC: 486 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 487 IEEE80211_HT_CAP_SM_PS_SHIFT; 488 break; 489 } 490 491 /* reserve and fill IE */ 492 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 493 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 494 } 495 496 /* This function determines vht capability flags for the association 497 * and builds the IE. 498 * Note - the function may set the owner of the MU-MIMO capability 499 */ 500 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 501 struct sk_buff *skb, 502 struct ieee80211_supported_band *sband, 503 struct ieee80211_vht_cap *ap_vht_cap) 504 { 505 struct ieee80211_local *local = sdata->local; 506 u8 *pos; 507 u32 cap; 508 struct ieee80211_sta_vht_cap vht_cap; 509 u32 mask, ap_bf_sts, our_bf_sts; 510 511 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 512 513 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 514 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 515 516 /* determine capability flags */ 517 cap = vht_cap.cap; 518 519 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 520 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 521 522 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 523 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 524 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 525 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 526 } 527 528 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 529 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 530 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 531 } 532 533 /* 534 * Some APs apparently get confused if our capabilities are better 535 * than theirs, so restrict what we advertise in the assoc request. 536 */ 537 if (!(ap_vht_cap->vht_cap_info & 538 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 539 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 540 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 541 else if (!(ap_vht_cap->vht_cap_info & 542 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 543 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 544 545 /* 546 * If some other vif is using the MU-MIMO capablity we cannot associate 547 * using MU-MIMO - this will lead to contradictions in the group-id 548 * mechanism. 549 * Ownership is defined since association request, in order to avoid 550 * simultaneous associations with MU-MIMO. 551 */ 552 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 553 bool disable_mu_mimo = false; 554 struct ieee80211_sub_if_data *other; 555 556 list_for_each_entry_rcu(other, &local->interfaces, list) { 557 if (other->vif.mu_mimo_owner) { 558 disable_mu_mimo = true; 559 break; 560 } 561 } 562 if (disable_mu_mimo) 563 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 564 else 565 sdata->vif.mu_mimo_owner = true; 566 } 567 568 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 569 570 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 571 our_bf_sts = cap & mask; 572 573 if (ap_bf_sts < our_bf_sts) { 574 cap &= ~mask; 575 cap |= ap_bf_sts; 576 } 577 578 /* reserve and fill IE */ 579 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 580 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 581 } 582 583 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 584 { 585 struct ieee80211_local *local = sdata->local; 586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 588 struct sk_buff *skb; 589 struct ieee80211_mgmt *mgmt; 590 u8 *pos, qos_info; 591 size_t offset = 0, noffset; 592 int i, count, rates_len, supp_rates_len, shift; 593 u16 capab; 594 struct ieee80211_supported_band *sband; 595 struct ieee80211_chanctx_conf *chanctx_conf; 596 struct ieee80211_channel *chan; 597 u32 rates = 0; 598 599 sdata_assert_lock(sdata); 600 601 rcu_read_lock(); 602 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 603 if (WARN_ON(!chanctx_conf)) { 604 rcu_read_unlock(); 605 return; 606 } 607 chan = chanctx_conf->def.chan; 608 rcu_read_unlock(); 609 sband = local->hw.wiphy->bands[chan->band]; 610 shift = ieee80211_vif_get_shift(&sdata->vif); 611 612 if (assoc_data->supp_rates_len) { 613 /* 614 * Get all rates supported by the device and the AP as 615 * some APs don't like getting a superset of their rates 616 * in the association request (e.g. D-Link DAP 1353 in 617 * b-only mode)... 618 */ 619 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 620 assoc_data->supp_rates, 621 assoc_data->supp_rates_len, 622 &rates); 623 } else { 624 /* 625 * In case AP not provide any supported rates information 626 * before association, we send information element(s) with 627 * all rates that we support. 628 */ 629 rates_len = 0; 630 for (i = 0; i < sband->n_bitrates; i++) { 631 rates |= BIT(i); 632 rates_len++; 633 } 634 } 635 636 skb = alloc_skb(local->hw.extra_tx_headroom + 637 sizeof(*mgmt) + /* bit too much but doesn't matter */ 638 2 + assoc_data->ssid_len + /* SSID */ 639 4 + rates_len + /* (extended) rates */ 640 4 + /* power capability */ 641 2 + 2 * sband->n_channels + /* supported channels */ 642 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 643 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 644 assoc_data->ie_len + /* extra IEs */ 645 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 646 9, /* WMM */ 647 GFP_KERNEL); 648 if (!skb) 649 return; 650 651 skb_reserve(skb, local->hw.extra_tx_headroom); 652 653 capab = WLAN_CAPABILITY_ESS; 654 655 if (sband->band == NL80211_BAND_2GHZ) { 656 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 657 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 658 } 659 660 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 661 capab |= WLAN_CAPABILITY_PRIVACY; 662 663 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 664 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 665 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 666 667 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 668 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 669 670 mgmt = skb_put_zero(skb, 24); 671 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 672 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 673 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 674 675 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 676 skb_put(skb, 10); 677 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 678 IEEE80211_STYPE_REASSOC_REQ); 679 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 680 mgmt->u.reassoc_req.listen_interval = 681 cpu_to_le16(local->hw.conf.listen_interval); 682 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 683 ETH_ALEN); 684 } else { 685 skb_put(skb, 4); 686 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 687 IEEE80211_STYPE_ASSOC_REQ); 688 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 689 mgmt->u.assoc_req.listen_interval = 690 cpu_to_le16(local->hw.conf.listen_interval); 691 } 692 693 /* SSID */ 694 pos = skb_put(skb, 2 + assoc_data->ssid_len); 695 *pos++ = WLAN_EID_SSID; 696 *pos++ = assoc_data->ssid_len; 697 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 698 699 /* add all rates which were marked to be used above */ 700 supp_rates_len = rates_len; 701 if (supp_rates_len > 8) 702 supp_rates_len = 8; 703 704 pos = skb_put(skb, supp_rates_len + 2); 705 *pos++ = WLAN_EID_SUPP_RATES; 706 *pos++ = supp_rates_len; 707 708 count = 0; 709 for (i = 0; i < sband->n_bitrates; i++) { 710 if (BIT(i) & rates) { 711 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 712 5 * (1 << shift)); 713 *pos++ = (u8) rate; 714 if (++count == 8) 715 break; 716 } 717 } 718 719 if (rates_len > count) { 720 pos = skb_put(skb, rates_len - count + 2); 721 *pos++ = WLAN_EID_EXT_SUPP_RATES; 722 *pos++ = rates_len - count; 723 724 for (i++; i < sband->n_bitrates; i++) { 725 if (BIT(i) & rates) { 726 int rate; 727 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 728 5 * (1 << shift)); 729 *pos++ = (u8) rate; 730 } 731 } 732 } 733 734 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 735 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 736 pos = skb_put(skb, 4); 737 *pos++ = WLAN_EID_PWR_CAPABILITY; 738 *pos++ = 2; 739 *pos++ = 0; /* min tx power */ 740 /* max tx power */ 741 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 742 } 743 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 745 /* TODO: get this in reg domain format */ 746 pos = skb_put(skb, 2 * sband->n_channels + 2); 747 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 748 *pos++ = 2 * sband->n_channels; 749 for (i = 0; i < sband->n_channels; i++) { 750 *pos++ = ieee80211_frequency_to_channel( 751 sband->channels[i].center_freq); 752 *pos++ = 1; /* one channel in the subband*/ 753 } 754 } 755 756 /* if present, add any custom IEs that go before HT */ 757 if (assoc_data->ie_len) { 758 static const u8 before_ht[] = { 759 WLAN_EID_SSID, 760 WLAN_EID_SUPP_RATES, 761 WLAN_EID_EXT_SUPP_RATES, 762 WLAN_EID_PWR_CAPABILITY, 763 WLAN_EID_SUPPORTED_CHANNELS, 764 WLAN_EID_RSN, 765 WLAN_EID_QOS_CAPA, 766 WLAN_EID_RRM_ENABLED_CAPABILITIES, 767 WLAN_EID_MOBILITY_DOMAIN, 768 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 769 WLAN_EID_RIC_DATA, /* reassoc only */ 770 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 771 }; 772 static const u8 after_ric[] = { 773 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 774 WLAN_EID_HT_CAPABILITY, 775 WLAN_EID_BSS_COEX_2040, 776 /* luckily this is almost always there */ 777 WLAN_EID_EXT_CAPABILITY, 778 WLAN_EID_QOS_TRAFFIC_CAPA, 779 WLAN_EID_TIM_BCAST_REQ, 780 WLAN_EID_INTERWORKING, 781 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 782 WLAN_EID_VHT_CAPABILITY, 783 WLAN_EID_OPMODE_NOTIF, 784 }; 785 786 noffset = ieee80211_ie_split_ric(assoc_data->ie, 787 assoc_data->ie_len, 788 before_ht, 789 ARRAY_SIZE(before_ht), 790 after_ric, 791 ARRAY_SIZE(after_ric), 792 offset); 793 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 794 offset = noffset; 795 } 796 797 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 798 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 799 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 800 801 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 802 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 803 sband, chan, sdata->smps_mode); 804 805 /* if present, add any custom IEs that go before VHT */ 806 if (assoc_data->ie_len) { 807 static const u8 before_vht[] = { 808 /* 809 * no need to list the ones split off before HT 810 * or generated here 811 */ 812 WLAN_EID_BSS_COEX_2040, 813 WLAN_EID_EXT_CAPABILITY, 814 WLAN_EID_QOS_TRAFFIC_CAPA, 815 WLAN_EID_TIM_BCAST_REQ, 816 WLAN_EID_INTERWORKING, 817 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 818 }; 819 820 /* RIC already taken above, so no need to handle here anymore */ 821 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 822 before_vht, ARRAY_SIZE(before_vht), 823 offset); 824 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 825 offset = noffset; 826 } 827 828 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 829 ieee80211_add_vht_ie(sdata, skb, sband, 830 &assoc_data->ap_vht_cap); 831 832 /* if present, add any custom non-vendor IEs that go after HT */ 833 if (assoc_data->ie_len) { 834 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 835 assoc_data->ie_len, 836 offset); 837 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 838 offset = noffset; 839 } 840 841 if (assoc_data->wmm) { 842 if (assoc_data->uapsd) { 843 qos_info = ifmgd->uapsd_queues; 844 qos_info |= (ifmgd->uapsd_max_sp_len << 845 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 846 } else { 847 qos_info = 0; 848 } 849 850 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 851 } 852 853 /* add any remaining custom (i.e. vendor specific here) IEs */ 854 if (assoc_data->ie_len) { 855 noffset = assoc_data->ie_len; 856 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 857 } 858 859 if (assoc_data->fils_kek_len && 860 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 861 dev_kfree_skb(skb); 862 return; 863 } 864 865 drv_mgd_prepare_tx(local, sdata); 866 867 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 868 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 869 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 870 IEEE80211_TX_INTFL_MLME_CONN_TX; 871 ieee80211_tx_skb(sdata, skb); 872 } 873 874 void ieee80211_send_pspoll(struct ieee80211_local *local, 875 struct ieee80211_sub_if_data *sdata) 876 { 877 struct ieee80211_pspoll *pspoll; 878 struct sk_buff *skb; 879 880 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 881 if (!skb) 882 return; 883 884 pspoll = (struct ieee80211_pspoll *) skb->data; 885 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 886 887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 888 ieee80211_tx_skb(sdata, skb); 889 } 890 891 void ieee80211_send_nullfunc(struct ieee80211_local *local, 892 struct ieee80211_sub_if_data *sdata, 893 bool powersave) 894 { 895 struct sk_buff *skb; 896 struct ieee80211_hdr_3addr *nullfunc; 897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 898 899 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, true); 900 if (!skb) 901 return; 902 903 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 904 if (powersave) 905 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 906 907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 908 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 909 910 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 911 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 912 913 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 915 916 ieee80211_tx_skb(sdata, skb); 917 } 918 919 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 920 struct ieee80211_sub_if_data *sdata) 921 { 922 struct sk_buff *skb; 923 struct ieee80211_hdr *nullfunc; 924 __le16 fc; 925 926 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 927 return; 928 929 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 930 if (!skb) 931 return; 932 933 skb_reserve(skb, local->hw.extra_tx_headroom); 934 935 nullfunc = skb_put_zero(skb, 30); 936 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 937 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 938 nullfunc->frame_control = fc; 939 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 940 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 941 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 942 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 943 944 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 945 ieee80211_tx_skb(sdata, skb); 946 } 947 948 /* spectrum management related things */ 949 static void ieee80211_chswitch_work(struct work_struct *work) 950 { 951 struct ieee80211_sub_if_data *sdata = 952 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 953 struct ieee80211_local *local = sdata->local; 954 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 955 int ret; 956 957 if (!ieee80211_sdata_running(sdata)) 958 return; 959 960 sdata_lock(sdata); 961 mutex_lock(&local->mtx); 962 mutex_lock(&local->chanctx_mtx); 963 964 if (!ifmgd->associated) 965 goto out; 966 967 if (!sdata->vif.csa_active) 968 goto out; 969 970 /* 971 * using reservation isn't immediate as it may be deferred until later 972 * with multi-vif. once reservation is complete it will re-schedule the 973 * work with no reserved_chanctx so verify chandef to check if it 974 * completed successfully 975 */ 976 977 if (sdata->reserved_chanctx) { 978 /* 979 * with multi-vif csa driver may call ieee80211_csa_finish() 980 * many times while waiting for other interfaces to use their 981 * reservations 982 */ 983 if (sdata->reserved_ready) 984 goto out; 985 986 ret = ieee80211_vif_use_reserved_context(sdata); 987 if (ret) { 988 sdata_info(sdata, 989 "failed to use reserved channel context, disconnecting (err=%d)\n", 990 ret); 991 ieee80211_queue_work(&sdata->local->hw, 992 &ifmgd->csa_connection_drop_work); 993 goto out; 994 } 995 996 goto out; 997 } 998 999 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1000 &sdata->csa_chandef)) { 1001 sdata_info(sdata, 1002 "failed to finalize channel switch, disconnecting\n"); 1003 ieee80211_queue_work(&sdata->local->hw, 1004 &ifmgd->csa_connection_drop_work); 1005 goto out; 1006 } 1007 1008 /* XXX: shouldn't really modify cfg80211-owned data! */ 1009 ifmgd->associated->channel = sdata->csa_chandef.chan; 1010 1011 ifmgd->csa_waiting_bcn = true; 1012 1013 ieee80211_sta_reset_beacon_monitor(sdata); 1014 ieee80211_sta_reset_conn_monitor(sdata); 1015 1016 out: 1017 mutex_unlock(&local->chanctx_mtx); 1018 mutex_unlock(&local->mtx); 1019 sdata_unlock(sdata); 1020 } 1021 1022 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1023 { 1024 struct ieee80211_local *local = sdata->local; 1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1026 int ret; 1027 1028 sdata_assert_lock(sdata); 1029 1030 WARN_ON(!sdata->vif.csa_active); 1031 1032 if (sdata->csa_block_tx) { 1033 ieee80211_wake_vif_queues(local, sdata, 1034 IEEE80211_QUEUE_STOP_REASON_CSA); 1035 sdata->csa_block_tx = false; 1036 } 1037 1038 sdata->vif.csa_active = false; 1039 ifmgd->csa_waiting_bcn = false; 1040 1041 ret = drv_post_channel_switch(sdata); 1042 if (ret) { 1043 sdata_info(sdata, 1044 "driver post channel switch failed, disconnecting\n"); 1045 ieee80211_queue_work(&local->hw, 1046 &ifmgd->csa_connection_drop_work); 1047 return; 1048 } 1049 1050 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1051 } 1052 1053 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1054 { 1055 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1057 1058 trace_api_chswitch_done(sdata, success); 1059 if (!success) { 1060 sdata_info(sdata, 1061 "driver channel switch failed, disconnecting\n"); 1062 ieee80211_queue_work(&sdata->local->hw, 1063 &ifmgd->csa_connection_drop_work); 1064 } else { 1065 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1066 } 1067 } 1068 EXPORT_SYMBOL(ieee80211_chswitch_done); 1069 1070 static void ieee80211_chswitch_timer(struct timer_list *t) 1071 { 1072 struct ieee80211_sub_if_data *sdata = 1073 from_timer(sdata, t, u.mgd.chswitch_timer); 1074 1075 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1076 } 1077 1078 static void 1079 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1080 u64 timestamp, u32 device_timestamp, 1081 struct ieee802_11_elems *elems, 1082 bool beacon) 1083 { 1084 struct ieee80211_local *local = sdata->local; 1085 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1086 struct cfg80211_bss *cbss = ifmgd->associated; 1087 struct ieee80211_chanctx_conf *conf; 1088 struct ieee80211_chanctx *chanctx; 1089 enum nl80211_band current_band; 1090 struct ieee80211_csa_ie csa_ie; 1091 struct ieee80211_channel_switch ch_switch; 1092 int res; 1093 1094 sdata_assert_lock(sdata); 1095 1096 if (!cbss) 1097 return; 1098 1099 if (local->scanning) 1100 return; 1101 1102 /* disregard subsequent announcements if we are already processing */ 1103 if (sdata->vif.csa_active) 1104 return; 1105 1106 current_band = cbss->channel->band; 1107 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1108 ifmgd->flags, 1109 ifmgd->associated->bssid, &csa_ie); 1110 if (res < 0) 1111 ieee80211_queue_work(&local->hw, 1112 &ifmgd->csa_connection_drop_work); 1113 if (res) 1114 return; 1115 1116 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1117 IEEE80211_CHAN_DISABLED)) { 1118 sdata_info(sdata, 1119 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1120 ifmgd->associated->bssid, 1121 csa_ie.chandef.chan->center_freq, 1122 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1123 csa_ie.chandef.center_freq2); 1124 ieee80211_queue_work(&local->hw, 1125 &ifmgd->csa_connection_drop_work); 1126 return; 1127 } 1128 1129 if (cfg80211_chandef_identical(&csa_ie.chandef, 1130 &sdata->vif.bss_conf.chandef)) { 1131 if (ifmgd->csa_ignored_same_chan) 1132 return; 1133 sdata_info(sdata, 1134 "AP %pM tries to chanswitch to same channel, ignore\n", 1135 ifmgd->associated->bssid); 1136 ifmgd->csa_ignored_same_chan = true; 1137 return; 1138 } 1139 1140 /* 1141 * Drop all TDLS peers - either we disconnect or move to a different 1142 * channel from this point on. There's no telling what our peer will do. 1143 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1144 * have an incompatible wider chandef. 1145 */ 1146 ieee80211_teardown_tdls_peers(sdata); 1147 1148 mutex_lock(&local->mtx); 1149 mutex_lock(&local->chanctx_mtx); 1150 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1151 lockdep_is_held(&local->chanctx_mtx)); 1152 if (!conf) { 1153 sdata_info(sdata, 1154 "no channel context assigned to vif?, disconnecting\n"); 1155 goto drop_connection; 1156 } 1157 1158 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1159 1160 if (local->use_chanctx && 1161 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1162 sdata_info(sdata, 1163 "driver doesn't support chan-switch with channel contexts\n"); 1164 goto drop_connection; 1165 } 1166 1167 ch_switch.timestamp = timestamp; 1168 ch_switch.device_timestamp = device_timestamp; 1169 ch_switch.block_tx = csa_ie.mode; 1170 ch_switch.chandef = csa_ie.chandef; 1171 ch_switch.count = csa_ie.count; 1172 1173 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1174 sdata_info(sdata, 1175 "preparing for channel switch failed, disconnecting\n"); 1176 goto drop_connection; 1177 } 1178 1179 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1180 chanctx->mode, false); 1181 if (res) { 1182 sdata_info(sdata, 1183 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1184 res); 1185 goto drop_connection; 1186 } 1187 mutex_unlock(&local->chanctx_mtx); 1188 1189 sdata->vif.csa_active = true; 1190 sdata->csa_chandef = csa_ie.chandef; 1191 sdata->csa_block_tx = csa_ie.mode; 1192 ifmgd->csa_ignored_same_chan = false; 1193 1194 if (sdata->csa_block_tx) 1195 ieee80211_stop_vif_queues(local, sdata, 1196 IEEE80211_QUEUE_STOP_REASON_CSA); 1197 mutex_unlock(&local->mtx); 1198 1199 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1200 csa_ie.count); 1201 1202 if (local->ops->channel_switch) { 1203 /* use driver's channel switch callback */ 1204 drv_channel_switch(local, sdata, &ch_switch); 1205 return; 1206 } 1207 1208 /* channel switch handled in software */ 1209 if (csa_ie.count <= 1) 1210 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1211 else 1212 mod_timer(&ifmgd->chswitch_timer, 1213 TU_TO_EXP_TIME((csa_ie.count - 1) * 1214 cbss->beacon_interval)); 1215 return; 1216 drop_connection: 1217 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1218 mutex_unlock(&local->chanctx_mtx); 1219 mutex_unlock(&local->mtx); 1220 } 1221 1222 static bool 1223 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1224 struct ieee80211_channel *channel, 1225 const u8 *country_ie, u8 country_ie_len, 1226 const u8 *pwr_constr_elem, 1227 int *chan_pwr, int *pwr_reduction) 1228 { 1229 struct ieee80211_country_ie_triplet *triplet; 1230 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1231 int i, chan_increment; 1232 bool have_chan_pwr = false; 1233 1234 /* Invalid IE */ 1235 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1236 return false; 1237 1238 triplet = (void *)(country_ie + 3); 1239 country_ie_len -= 3; 1240 1241 switch (channel->band) { 1242 default: 1243 WARN_ON_ONCE(1); 1244 /* fall through */ 1245 case NL80211_BAND_2GHZ: 1246 case NL80211_BAND_60GHZ: 1247 chan_increment = 1; 1248 break; 1249 case NL80211_BAND_5GHZ: 1250 chan_increment = 4; 1251 break; 1252 } 1253 1254 /* find channel */ 1255 while (country_ie_len >= 3) { 1256 u8 first_channel = triplet->chans.first_channel; 1257 1258 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1259 goto next; 1260 1261 for (i = 0; i < triplet->chans.num_channels; i++) { 1262 if (first_channel + i * chan_increment == chan) { 1263 have_chan_pwr = true; 1264 *chan_pwr = triplet->chans.max_power; 1265 break; 1266 } 1267 } 1268 if (have_chan_pwr) 1269 break; 1270 1271 next: 1272 triplet++; 1273 country_ie_len -= 3; 1274 } 1275 1276 if (have_chan_pwr && pwr_constr_elem) 1277 *pwr_reduction = *pwr_constr_elem; 1278 else 1279 *pwr_reduction = 0; 1280 1281 return have_chan_pwr; 1282 } 1283 1284 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1285 struct ieee80211_channel *channel, 1286 const u8 *cisco_dtpc_ie, 1287 int *pwr_level) 1288 { 1289 /* From practical testing, the first data byte of the DTPC element 1290 * seems to contain the requested dBm level, and the CLI on Cisco 1291 * APs clearly state the range is -127 to 127 dBm, which indicates 1292 * a signed byte, although it seemingly never actually goes negative. 1293 * The other byte seems to always be zero. 1294 */ 1295 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1296 } 1297 1298 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1299 struct ieee80211_channel *channel, 1300 struct ieee80211_mgmt *mgmt, 1301 const u8 *country_ie, u8 country_ie_len, 1302 const u8 *pwr_constr_ie, 1303 const u8 *cisco_dtpc_ie) 1304 { 1305 bool has_80211h_pwr = false, has_cisco_pwr = false; 1306 int chan_pwr = 0, pwr_reduction_80211h = 0; 1307 int pwr_level_cisco, pwr_level_80211h; 1308 int new_ap_level; 1309 __le16 capab = mgmt->u.probe_resp.capab_info; 1310 1311 if (country_ie && 1312 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1313 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1314 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1315 sdata, channel, country_ie, country_ie_len, 1316 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1317 pwr_level_80211h = 1318 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1319 } 1320 1321 if (cisco_dtpc_ie) { 1322 ieee80211_find_cisco_dtpc( 1323 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1324 has_cisco_pwr = true; 1325 } 1326 1327 if (!has_80211h_pwr && !has_cisco_pwr) 1328 return 0; 1329 1330 /* If we have both 802.11h and Cisco DTPC, apply both limits 1331 * by picking the smallest of the two power levels advertised. 1332 */ 1333 if (has_80211h_pwr && 1334 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1335 new_ap_level = pwr_level_80211h; 1336 1337 if (sdata->ap_power_level == new_ap_level) 1338 return 0; 1339 1340 sdata_dbg(sdata, 1341 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1342 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1343 sdata->u.mgd.bssid); 1344 } else { /* has_cisco_pwr is always true here. */ 1345 new_ap_level = pwr_level_cisco; 1346 1347 if (sdata->ap_power_level == new_ap_level) 1348 return 0; 1349 1350 sdata_dbg(sdata, 1351 "Limiting TX power to %d dBm as advertised by %pM\n", 1352 pwr_level_cisco, sdata->u.mgd.bssid); 1353 } 1354 1355 sdata->ap_power_level = new_ap_level; 1356 if (__ieee80211_recalc_txpower(sdata)) 1357 return BSS_CHANGED_TXPOWER; 1358 return 0; 1359 } 1360 1361 /* powersave */ 1362 static void ieee80211_enable_ps(struct ieee80211_local *local, 1363 struct ieee80211_sub_if_data *sdata) 1364 { 1365 struct ieee80211_conf *conf = &local->hw.conf; 1366 1367 /* 1368 * If we are scanning right now then the parameters will 1369 * take effect when scan finishes. 1370 */ 1371 if (local->scanning) 1372 return; 1373 1374 if (conf->dynamic_ps_timeout > 0 && 1375 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1376 mod_timer(&local->dynamic_ps_timer, jiffies + 1377 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1378 } else { 1379 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1380 ieee80211_send_nullfunc(local, sdata, true); 1381 1382 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1383 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1384 return; 1385 1386 conf->flags |= IEEE80211_CONF_PS; 1387 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1388 } 1389 } 1390 1391 static void ieee80211_change_ps(struct ieee80211_local *local) 1392 { 1393 struct ieee80211_conf *conf = &local->hw.conf; 1394 1395 if (local->ps_sdata) { 1396 ieee80211_enable_ps(local, local->ps_sdata); 1397 } else if (conf->flags & IEEE80211_CONF_PS) { 1398 conf->flags &= ~IEEE80211_CONF_PS; 1399 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1400 del_timer_sync(&local->dynamic_ps_timer); 1401 cancel_work_sync(&local->dynamic_ps_enable_work); 1402 } 1403 } 1404 1405 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1406 { 1407 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1408 struct sta_info *sta = NULL; 1409 bool authorized = false; 1410 1411 if (!mgd->powersave) 1412 return false; 1413 1414 if (mgd->broken_ap) 1415 return false; 1416 1417 if (!mgd->associated) 1418 return false; 1419 1420 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1421 return false; 1422 1423 if (!mgd->have_beacon) 1424 return false; 1425 1426 rcu_read_lock(); 1427 sta = sta_info_get(sdata, mgd->bssid); 1428 if (sta) 1429 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1430 rcu_read_unlock(); 1431 1432 return authorized; 1433 } 1434 1435 /* need to hold RTNL or interface lock */ 1436 void ieee80211_recalc_ps(struct ieee80211_local *local) 1437 { 1438 struct ieee80211_sub_if_data *sdata, *found = NULL; 1439 int count = 0; 1440 int timeout; 1441 1442 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1443 local->ps_sdata = NULL; 1444 return; 1445 } 1446 1447 list_for_each_entry(sdata, &local->interfaces, list) { 1448 if (!ieee80211_sdata_running(sdata)) 1449 continue; 1450 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1451 /* If an AP vif is found, then disable PS 1452 * by setting the count to zero thereby setting 1453 * ps_sdata to NULL. 1454 */ 1455 count = 0; 1456 break; 1457 } 1458 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1459 continue; 1460 found = sdata; 1461 count++; 1462 } 1463 1464 if (count == 1 && ieee80211_powersave_allowed(found)) { 1465 u8 dtimper = found->u.mgd.dtim_period; 1466 1467 timeout = local->dynamic_ps_forced_timeout; 1468 if (timeout < 0) 1469 timeout = 100; 1470 local->hw.conf.dynamic_ps_timeout = timeout; 1471 1472 /* If the TIM IE is invalid, pretend the value is 1 */ 1473 if (!dtimper) 1474 dtimper = 1; 1475 1476 local->hw.conf.ps_dtim_period = dtimper; 1477 local->ps_sdata = found; 1478 } else { 1479 local->ps_sdata = NULL; 1480 } 1481 1482 ieee80211_change_ps(local); 1483 } 1484 1485 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1486 { 1487 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1488 1489 if (sdata->vif.bss_conf.ps != ps_allowed) { 1490 sdata->vif.bss_conf.ps = ps_allowed; 1491 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1492 } 1493 } 1494 1495 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1496 { 1497 struct ieee80211_local *local = 1498 container_of(work, struct ieee80211_local, 1499 dynamic_ps_disable_work); 1500 1501 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1502 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1503 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1504 } 1505 1506 ieee80211_wake_queues_by_reason(&local->hw, 1507 IEEE80211_MAX_QUEUE_MAP, 1508 IEEE80211_QUEUE_STOP_REASON_PS, 1509 false); 1510 } 1511 1512 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1513 { 1514 struct ieee80211_local *local = 1515 container_of(work, struct ieee80211_local, 1516 dynamic_ps_enable_work); 1517 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1518 struct ieee80211_if_managed *ifmgd; 1519 unsigned long flags; 1520 int q; 1521 1522 /* can only happen when PS was just disabled anyway */ 1523 if (!sdata) 1524 return; 1525 1526 ifmgd = &sdata->u.mgd; 1527 1528 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1529 return; 1530 1531 if (local->hw.conf.dynamic_ps_timeout > 0) { 1532 /* don't enter PS if TX frames are pending */ 1533 if (drv_tx_frames_pending(local)) { 1534 mod_timer(&local->dynamic_ps_timer, jiffies + 1535 msecs_to_jiffies( 1536 local->hw.conf.dynamic_ps_timeout)); 1537 return; 1538 } 1539 1540 /* 1541 * transmission can be stopped by others which leads to 1542 * dynamic_ps_timer expiry. Postpone the ps timer if it 1543 * is not the actual idle state. 1544 */ 1545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1546 for (q = 0; q < local->hw.queues; q++) { 1547 if (local->queue_stop_reasons[q]) { 1548 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1549 flags); 1550 mod_timer(&local->dynamic_ps_timer, jiffies + 1551 msecs_to_jiffies( 1552 local->hw.conf.dynamic_ps_timeout)); 1553 return; 1554 } 1555 } 1556 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1557 } 1558 1559 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1560 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1561 if (drv_tx_frames_pending(local)) { 1562 mod_timer(&local->dynamic_ps_timer, jiffies + 1563 msecs_to_jiffies( 1564 local->hw.conf.dynamic_ps_timeout)); 1565 } else { 1566 ieee80211_send_nullfunc(local, sdata, true); 1567 /* Flush to get the tx status of nullfunc frame */ 1568 ieee80211_flush_queues(local, sdata, false); 1569 } 1570 } 1571 1572 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1573 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1574 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1575 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1576 local->hw.conf.flags |= IEEE80211_CONF_PS; 1577 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1578 } 1579 } 1580 1581 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1582 { 1583 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1584 1585 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1586 } 1587 1588 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1589 { 1590 struct delayed_work *delayed_work = to_delayed_work(work); 1591 struct ieee80211_sub_if_data *sdata = 1592 container_of(delayed_work, struct ieee80211_sub_if_data, 1593 dfs_cac_timer_work); 1594 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1595 1596 mutex_lock(&sdata->local->mtx); 1597 if (sdata->wdev.cac_started) { 1598 ieee80211_vif_release_channel(sdata); 1599 cfg80211_cac_event(sdata->dev, &chandef, 1600 NL80211_RADAR_CAC_FINISHED, 1601 GFP_KERNEL); 1602 } 1603 mutex_unlock(&sdata->local->mtx); 1604 } 1605 1606 static bool 1607 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1608 { 1609 struct ieee80211_local *local = sdata->local; 1610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1611 bool ret = false; 1612 int ac; 1613 1614 if (local->hw.queues < IEEE80211_NUM_ACS) 1615 return false; 1616 1617 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1618 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1619 int non_acm_ac; 1620 unsigned long now = jiffies; 1621 1622 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1623 tx_tspec->admitted_time && 1624 time_after(now, tx_tspec->time_slice_start + HZ)) { 1625 tx_tspec->consumed_tx_time = 0; 1626 tx_tspec->time_slice_start = now; 1627 1628 if (tx_tspec->downgraded) 1629 tx_tspec->action = 1630 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1631 } 1632 1633 switch (tx_tspec->action) { 1634 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1635 /* take the original parameters */ 1636 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1637 sdata_err(sdata, 1638 "failed to set TX queue parameters for queue %d\n", 1639 ac); 1640 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1641 tx_tspec->downgraded = false; 1642 ret = true; 1643 break; 1644 case TX_TSPEC_ACTION_DOWNGRADE: 1645 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1646 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1647 ret = true; 1648 break; 1649 } 1650 /* downgrade next lower non-ACM AC */ 1651 for (non_acm_ac = ac + 1; 1652 non_acm_ac < IEEE80211_NUM_ACS; 1653 non_acm_ac++) 1654 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1655 break; 1656 /* Usually the loop will result in using BK even if it 1657 * requires admission control, but such a configuration 1658 * makes no sense and we have to transmit somehow - the 1659 * AC selection does the same thing. 1660 * If we started out trying to downgrade from BK, then 1661 * the extra condition here might be needed. 1662 */ 1663 if (non_acm_ac >= IEEE80211_NUM_ACS) 1664 non_acm_ac = IEEE80211_AC_BK; 1665 if (drv_conf_tx(local, sdata, ac, 1666 &sdata->tx_conf[non_acm_ac])) 1667 sdata_err(sdata, 1668 "failed to set TX queue parameters for queue %d\n", 1669 ac); 1670 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1671 ret = true; 1672 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1673 tx_tspec->time_slice_start + HZ - now + 1); 1674 break; 1675 case TX_TSPEC_ACTION_NONE: 1676 /* nothing now */ 1677 break; 1678 } 1679 } 1680 1681 return ret; 1682 } 1683 1684 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1685 { 1686 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1687 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1688 } 1689 1690 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1691 { 1692 struct ieee80211_sub_if_data *sdata; 1693 1694 sdata = container_of(work, struct ieee80211_sub_if_data, 1695 u.mgd.tx_tspec_wk.work); 1696 ieee80211_sta_handle_tspec_ac_params(sdata); 1697 } 1698 1699 /* MLME */ 1700 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1701 struct ieee80211_sub_if_data *sdata, 1702 const u8 *wmm_param, size_t wmm_param_len) 1703 { 1704 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1706 size_t left; 1707 int count, ac; 1708 const u8 *pos; 1709 u8 uapsd_queues = 0; 1710 1711 if (!local->ops->conf_tx) 1712 return false; 1713 1714 if (local->hw.queues < IEEE80211_NUM_ACS) 1715 return false; 1716 1717 if (!wmm_param) 1718 return false; 1719 1720 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1721 return false; 1722 1723 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1724 uapsd_queues = ifmgd->uapsd_queues; 1725 1726 count = wmm_param[6] & 0x0f; 1727 if (count == ifmgd->wmm_last_param_set) 1728 return false; 1729 ifmgd->wmm_last_param_set = count; 1730 1731 pos = wmm_param + 8; 1732 left = wmm_param_len - 8; 1733 1734 memset(¶ms, 0, sizeof(params)); 1735 1736 sdata->wmm_acm = 0; 1737 for (; left >= 4; left -= 4, pos += 4) { 1738 int aci = (pos[0] >> 5) & 0x03; 1739 int acm = (pos[0] >> 4) & 0x01; 1740 bool uapsd = false; 1741 1742 switch (aci) { 1743 case 1: /* AC_BK */ 1744 ac = IEEE80211_AC_BK; 1745 if (acm) 1746 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1747 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1748 uapsd = true; 1749 break; 1750 case 2: /* AC_VI */ 1751 ac = IEEE80211_AC_VI; 1752 if (acm) 1753 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1754 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1755 uapsd = true; 1756 break; 1757 case 3: /* AC_VO */ 1758 ac = IEEE80211_AC_VO; 1759 if (acm) 1760 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1761 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1762 uapsd = true; 1763 break; 1764 case 0: /* AC_BE */ 1765 default: 1766 ac = IEEE80211_AC_BE; 1767 if (acm) 1768 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1770 uapsd = true; 1771 break; 1772 } 1773 1774 params[ac].aifs = pos[0] & 0x0f; 1775 1776 if (params[ac].aifs < 2) { 1777 sdata_info(sdata, 1778 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1779 params[ac].aifs, aci); 1780 params[ac].aifs = 2; 1781 } 1782 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1783 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1784 params[ac].txop = get_unaligned_le16(pos + 2); 1785 params[ac].acm = acm; 1786 params[ac].uapsd = uapsd; 1787 1788 if (params[ac].cw_min > params[ac].cw_max) { 1789 sdata_info(sdata, 1790 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1791 params[ac].cw_min, params[ac].cw_max, aci); 1792 return false; 1793 } 1794 } 1795 1796 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1797 mlme_dbg(sdata, 1798 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1799 ac, params[ac].acm, 1800 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1801 params[ac].txop, params[ac].uapsd, 1802 ifmgd->tx_tspec[ac].downgraded); 1803 sdata->tx_conf[ac] = params[ac]; 1804 if (!ifmgd->tx_tspec[ac].downgraded && 1805 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1806 sdata_err(sdata, 1807 "failed to set TX queue parameters for AC %d\n", 1808 ac); 1809 } 1810 1811 /* enable WMM or activate new settings */ 1812 sdata->vif.bss_conf.qos = true; 1813 return true; 1814 } 1815 1816 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1817 { 1818 lockdep_assert_held(&sdata->local->mtx); 1819 1820 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1821 ieee80211_run_deferred_scan(sdata->local); 1822 } 1823 1824 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1825 { 1826 mutex_lock(&sdata->local->mtx); 1827 __ieee80211_stop_poll(sdata); 1828 mutex_unlock(&sdata->local->mtx); 1829 } 1830 1831 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1832 u16 capab, bool erp_valid, u8 erp) 1833 { 1834 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1835 struct ieee80211_supported_band *sband; 1836 u32 changed = 0; 1837 bool use_protection; 1838 bool use_short_preamble; 1839 bool use_short_slot; 1840 1841 sband = ieee80211_get_sband(sdata); 1842 if (!sband) 1843 return changed; 1844 1845 if (erp_valid) { 1846 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1847 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1848 } else { 1849 use_protection = false; 1850 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1851 } 1852 1853 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1854 if (sband->band == NL80211_BAND_5GHZ) 1855 use_short_slot = true; 1856 1857 if (use_protection != bss_conf->use_cts_prot) { 1858 bss_conf->use_cts_prot = use_protection; 1859 changed |= BSS_CHANGED_ERP_CTS_PROT; 1860 } 1861 1862 if (use_short_preamble != bss_conf->use_short_preamble) { 1863 bss_conf->use_short_preamble = use_short_preamble; 1864 changed |= BSS_CHANGED_ERP_PREAMBLE; 1865 } 1866 1867 if (use_short_slot != bss_conf->use_short_slot) { 1868 bss_conf->use_short_slot = use_short_slot; 1869 changed |= BSS_CHANGED_ERP_SLOT; 1870 } 1871 1872 return changed; 1873 } 1874 1875 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1876 struct cfg80211_bss *cbss, 1877 u32 bss_info_changed) 1878 { 1879 struct ieee80211_bss *bss = (void *)cbss->priv; 1880 struct ieee80211_local *local = sdata->local; 1881 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1882 1883 bss_info_changed |= BSS_CHANGED_ASSOC; 1884 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1885 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1886 1887 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1888 beacon_loss_count * bss_conf->beacon_int)); 1889 1890 sdata->u.mgd.associated = cbss; 1891 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1892 1893 ieee80211_check_rate_mask(sdata); 1894 1895 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1896 1897 if (sdata->vif.p2p || 1898 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1899 const struct cfg80211_bss_ies *ies; 1900 1901 rcu_read_lock(); 1902 ies = rcu_dereference(cbss->ies); 1903 if (ies) { 1904 int ret; 1905 1906 ret = cfg80211_get_p2p_attr( 1907 ies->data, ies->len, 1908 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1909 (u8 *) &bss_conf->p2p_noa_attr, 1910 sizeof(bss_conf->p2p_noa_attr)); 1911 if (ret >= 2) { 1912 sdata->u.mgd.p2p_noa_index = 1913 bss_conf->p2p_noa_attr.index; 1914 bss_info_changed |= BSS_CHANGED_P2P_PS; 1915 } 1916 } 1917 rcu_read_unlock(); 1918 } 1919 1920 /* just to be sure */ 1921 ieee80211_stop_poll(sdata); 1922 1923 ieee80211_led_assoc(local, 1); 1924 1925 if (sdata->u.mgd.have_beacon) { 1926 /* 1927 * If the AP is buggy we may get here with no DTIM period 1928 * known, so assume it's 1 which is the only safe assumption 1929 * in that case, although if the TIM IE is broken powersave 1930 * probably just won't work at all. 1931 */ 1932 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1933 bss_conf->beacon_rate = bss->beacon_rate; 1934 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1935 } else { 1936 bss_conf->beacon_rate = NULL; 1937 bss_conf->dtim_period = 0; 1938 } 1939 1940 bss_conf->assoc = 1; 1941 1942 /* Tell the driver to monitor connection quality (if supported) */ 1943 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1944 bss_conf->cqm_rssi_thold) 1945 bss_info_changed |= BSS_CHANGED_CQM; 1946 1947 /* Enable ARP filtering */ 1948 if (bss_conf->arp_addr_cnt) 1949 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1950 1951 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1952 1953 mutex_lock(&local->iflist_mtx); 1954 ieee80211_recalc_ps(local); 1955 mutex_unlock(&local->iflist_mtx); 1956 1957 ieee80211_recalc_smps(sdata); 1958 ieee80211_recalc_ps_vif(sdata); 1959 1960 netif_carrier_on(sdata->dev); 1961 } 1962 1963 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1964 u16 stype, u16 reason, bool tx, 1965 u8 *frame_buf) 1966 { 1967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1968 struct ieee80211_local *local = sdata->local; 1969 u32 changed = 0; 1970 1971 sdata_assert_lock(sdata); 1972 1973 if (WARN_ON_ONCE(tx && !frame_buf)) 1974 return; 1975 1976 if (WARN_ON(!ifmgd->associated)) 1977 return; 1978 1979 ieee80211_stop_poll(sdata); 1980 1981 ifmgd->associated = NULL; 1982 netif_carrier_off(sdata->dev); 1983 1984 /* 1985 * if we want to get out of ps before disassoc (why?) we have 1986 * to do it before sending disassoc, as otherwise the null-packet 1987 * won't be valid. 1988 */ 1989 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1990 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1991 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1992 } 1993 local->ps_sdata = NULL; 1994 1995 /* disable per-vif ps */ 1996 ieee80211_recalc_ps_vif(sdata); 1997 1998 /* make sure ongoing transmission finishes */ 1999 synchronize_net(); 2000 2001 /* 2002 * drop any frame before deauth/disassoc, this can be data or 2003 * management frame. Since we are disconnecting, we should not 2004 * insist sending these frames which can take time and delay 2005 * the disconnection and possible the roaming. 2006 */ 2007 if (tx) 2008 ieee80211_flush_queues(local, sdata, true); 2009 2010 /* deauthenticate/disassociate now */ 2011 if (tx || frame_buf) 2012 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2013 reason, tx, frame_buf); 2014 2015 /* flush out frame - make sure the deauth was actually sent */ 2016 if (tx) 2017 ieee80211_flush_queues(local, sdata, false); 2018 2019 /* clear bssid only after building the needed mgmt frames */ 2020 eth_zero_addr(ifmgd->bssid); 2021 2022 /* remove AP and TDLS peers */ 2023 sta_info_flush(sdata); 2024 2025 /* finally reset all BSS / config parameters */ 2026 changed |= ieee80211_reset_erp_info(sdata); 2027 2028 ieee80211_led_assoc(local, 0); 2029 changed |= BSS_CHANGED_ASSOC; 2030 sdata->vif.bss_conf.assoc = false; 2031 2032 ifmgd->p2p_noa_index = -1; 2033 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2034 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2035 2036 /* on the next assoc, re-program HT/VHT parameters */ 2037 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2038 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2039 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2040 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2041 2042 /* reset MU-MIMO ownership and group data */ 2043 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2044 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2045 memset(sdata->vif.bss_conf.mu_group.position, 0, 2046 sizeof(sdata->vif.bss_conf.mu_group.position)); 2047 changed |= BSS_CHANGED_MU_GROUPS; 2048 sdata->vif.mu_mimo_owner = false; 2049 2050 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2051 2052 del_timer_sync(&local->dynamic_ps_timer); 2053 cancel_work_sync(&local->dynamic_ps_enable_work); 2054 2055 /* Disable ARP filtering */ 2056 if (sdata->vif.bss_conf.arp_addr_cnt) 2057 changed |= BSS_CHANGED_ARP_FILTER; 2058 2059 sdata->vif.bss_conf.qos = false; 2060 changed |= BSS_CHANGED_QOS; 2061 2062 /* The BSSID (not really interesting) and HT changed */ 2063 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2064 ieee80211_bss_info_change_notify(sdata, changed); 2065 2066 /* disassociated - set to defaults now */ 2067 ieee80211_set_wmm_default(sdata, false, false); 2068 2069 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2070 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2071 del_timer_sync(&sdata->u.mgd.timer); 2072 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2073 2074 sdata->vif.bss_conf.dtim_period = 0; 2075 sdata->vif.bss_conf.beacon_rate = NULL; 2076 2077 ifmgd->have_beacon = false; 2078 2079 ifmgd->flags = 0; 2080 mutex_lock(&local->mtx); 2081 ieee80211_vif_release_channel(sdata); 2082 2083 sdata->vif.csa_active = false; 2084 ifmgd->csa_waiting_bcn = false; 2085 ifmgd->csa_ignored_same_chan = false; 2086 if (sdata->csa_block_tx) { 2087 ieee80211_wake_vif_queues(local, sdata, 2088 IEEE80211_QUEUE_STOP_REASON_CSA); 2089 sdata->csa_block_tx = false; 2090 } 2091 mutex_unlock(&local->mtx); 2092 2093 /* existing TX TSPEC sessions no longer exist */ 2094 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2095 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2096 2097 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2098 } 2099 2100 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2101 struct ieee80211_hdr *hdr) 2102 { 2103 /* 2104 * We can postpone the mgd.timer whenever receiving unicast frames 2105 * from AP because we know that the connection is working both ways 2106 * at that time. But multicast frames (and hence also beacons) must 2107 * be ignored here, because we need to trigger the timer during 2108 * data idle periods for sending the periodic probe request to the 2109 * AP we're connected to. 2110 */ 2111 if (is_multicast_ether_addr(hdr->addr1)) 2112 return; 2113 2114 ieee80211_sta_reset_conn_monitor(sdata); 2115 } 2116 2117 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2118 { 2119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2120 struct ieee80211_local *local = sdata->local; 2121 2122 mutex_lock(&local->mtx); 2123 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2124 goto out; 2125 2126 __ieee80211_stop_poll(sdata); 2127 2128 mutex_lock(&local->iflist_mtx); 2129 ieee80211_recalc_ps(local); 2130 mutex_unlock(&local->iflist_mtx); 2131 2132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2133 goto out; 2134 2135 /* 2136 * We've received a probe response, but are not sure whether 2137 * we have or will be receiving any beacons or data, so let's 2138 * schedule the timers again, just in case. 2139 */ 2140 ieee80211_sta_reset_beacon_monitor(sdata); 2141 2142 mod_timer(&ifmgd->conn_mon_timer, 2143 round_jiffies_up(jiffies + 2144 IEEE80211_CONNECTION_IDLE_TIME)); 2145 out: 2146 mutex_unlock(&local->mtx); 2147 } 2148 2149 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2150 struct ieee80211_hdr *hdr, 2151 u16 tx_time) 2152 { 2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2154 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2155 int ac = ieee80211_ac_from_tid(tid); 2156 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2157 unsigned long now = jiffies; 2158 2159 if (likely(!tx_tspec->admitted_time)) 2160 return; 2161 2162 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2163 tx_tspec->consumed_tx_time = 0; 2164 tx_tspec->time_slice_start = now; 2165 2166 if (tx_tspec->downgraded) { 2167 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2168 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2169 } 2170 } 2171 2172 if (tx_tspec->downgraded) 2173 return; 2174 2175 tx_tspec->consumed_tx_time += tx_time; 2176 2177 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2178 tx_tspec->downgraded = true; 2179 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2180 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2181 } 2182 } 2183 2184 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2185 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2186 { 2187 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2188 2189 if (!ieee80211_is_data(hdr->frame_control)) 2190 return; 2191 2192 if (ieee80211_is_nullfunc(hdr->frame_control) && 2193 sdata->u.mgd.probe_send_count > 0) { 2194 if (ack) 2195 ieee80211_sta_reset_conn_monitor(sdata); 2196 else 2197 sdata->u.mgd.nullfunc_failed = true; 2198 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2199 return; 2200 } 2201 2202 if (ack) 2203 ieee80211_sta_reset_conn_monitor(sdata); 2204 } 2205 2206 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2207 { 2208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2209 const u8 *ssid; 2210 u8 *dst = ifmgd->associated->bssid; 2211 u8 unicast_limit = max(1, max_probe_tries - 3); 2212 struct sta_info *sta; 2213 2214 /* 2215 * Try sending broadcast probe requests for the last three 2216 * probe requests after the first ones failed since some 2217 * buggy APs only support broadcast probe requests. 2218 */ 2219 if (ifmgd->probe_send_count >= unicast_limit) 2220 dst = NULL; 2221 2222 /* 2223 * When the hardware reports an accurate Tx ACK status, it's 2224 * better to send a nullfunc frame instead of a probe request, 2225 * as it will kick us off the AP quickly if we aren't associated 2226 * anymore. The timeout will be reset if the frame is ACKed by 2227 * the AP. 2228 */ 2229 ifmgd->probe_send_count++; 2230 2231 if (dst) { 2232 mutex_lock(&sdata->local->sta_mtx); 2233 sta = sta_info_get(sdata, dst); 2234 if (!WARN_ON(!sta)) 2235 ieee80211_check_fast_rx(sta); 2236 mutex_unlock(&sdata->local->sta_mtx); 2237 } 2238 2239 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2240 ifmgd->nullfunc_failed = false; 2241 ieee80211_send_nullfunc(sdata->local, sdata, false); 2242 } else { 2243 int ssid_len; 2244 2245 rcu_read_lock(); 2246 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2247 if (WARN_ON_ONCE(ssid == NULL)) 2248 ssid_len = 0; 2249 else 2250 ssid_len = ssid[1]; 2251 2252 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2253 ssid + 2, ssid_len, NULL, 2254 0, (u32) -1, true, 0, 2255 ifmgd->associated->channel, false); 2256 rcu_read_unlock(); 2257 } 2258 2259 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2260 run_again(sdata, ifmgd->probe_timeout); 2261 } 2262 2263 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2264 bool beacon) 2265 { 2266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2267 bool already = false; 2268 2269 if (!ieee80211_sdata_running(sdata)) 2270 return; 2271 2272 sdata_lock(sdata); 2273 2274 if (!ifmgd->associated) 2275 goto out; 2276 2277 mutex_lock(&sdata->local->mtx); 2278 2279 if (sdata->local->tmp_channel || sdata->local->scanning) { 2280 mutex_unlock(&sdata->local->mtx); 2281 goto out; 2282 } 2283 2284 if (beacon) { 2285 mlme_dbg_ratelimited(sdata, 2286 "detected beacon loss from AP (missed %d beacons) - probing\n", 2287 beacon_loss_count); 2288 2289 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2290 } 2291 2292 /* 2293 * The driver/our work has already reported this event or the 2294 * connection monitoring has kicked in and we have already sent 2295 * a probe request. Or maybe the AP died and the driver keeps 2296 * reporting until we disassociate... 2297 * 2298 * In either case we have to ignore the current call to this 2299 * function (except for setting the correct probe reason bit) 2300 * because otherwise we would reset the timer every time and 2301 * never check whether we received a probe response! 2302 */ 2303 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2304 already = true; 2305 2306 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2307 2308 mutex_unlock(&sdata->local->mtx); 2309 2310 if (already) 2311 goto out; 2312 2313 mutex_lock(&sdata->local->iflist_mtx); 2314 ieee80211_recalc_ps(sdata->local); 2315 mutex_unlock(&sdata->local->iflist_mtx); 2316 2317 ifmgd->probe_send_count = 0; 2318 ieee80211_mgd_probe_ap_send(sdata); 2319 out: 2320 sdata_unlock(sdata); 2321 } 2322 2323 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2324 struct ieee80211_vif *vif) 2325 { 2326 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2328 struct cfg80211_bss *cbss; 2329 struct sk_buff *skb; 2330 const u8 *ssid; 2331 int ssid_len; 2332 2333 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2334 return NULL; 2335 2336 sdata_assert_lock(sdata); 2337 2338 if (ifmgd->associated) 2339 cbss = ifmgd->associated; 2340 else if (ifmgd->auth_data) 2341 cbss = ifmgd->auth_data->bss; 2342 else if (ifmgd->assoc_data) 2343 cbss = ifmgd->assoc_data->bss; 2344 else 2345 return NULL; 2346 2347 rcu_read_lock(); 2348 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2349 if (WARN_ON_ONCE(ssid == NULL)) 2350 ssid_len = 0; 2351 else 2352 ssid_len = ssid[1]; 2353 2354 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2355 (u32) -1, cbss->channel, 2356 ssid + 2, ssid_len, 2357 NULL, 0, true); 2358 rcu_read_unlock(); 2359 2360 return skb; 2361 } 2362 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2363 2364 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2365 const u8 *buf, size_t len, bool tx, 2366 u16 reason) 2367 { 2368 struct ieee80211_event event = { 2369 .type = MLME_EVENT, 2370 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2371 .u.mlme.reason = reason, 2372 }; 2373 2374 if (tx) 2375 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2376 else 2377 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2378 2379 drv_event_callback(sdata->local, sdata, &event); 2380 } 2381 2382 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2383 { 2384 struct ieee80211_local *local = sdata->local; 2385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2386 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2387 2388 sdata_lock(sdata); 2389 if (!ifmgd->associated) { 2390 sdata_unlock(sdata); 2391 return; 2392 } 2393 2394 /* AP is probably out of range (or not reachable for another reason) so 2395 * remove the bss struct for that AP. 2396 */ 2397 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2398 2399 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2400 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2401 true, frame_buf); 2402 mutex_lock(&local->mtx); 2403 sdata->vif.csa_active = false; 2404 ifmgd->csa_waiting_bcn = false; 2405 if (sdata->csa_block_tx) { 2406 ieee80211_wake_vif_queues(local, sdata, 2407 IEEE80211_QUEUE_STOP_REASON_CSA); 2408 sdata->csa_block_tx = false; 2409 } 2410 mutex_unlock(&local->mtx); 2411 2412 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2413 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2414 2415 sdata_unlock(sdata); 2416 } 2417 2418 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2419 { 2420 struct ieee80211_sub_if_data *sdata = 2421 container_of(work, struct ieee80211_sub_if_data, 2422 u.mgd.beacon_connection_loss_work); 2423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2424 2425 if (ifmgd->associated) 2426 ifmgd->beacon_loss_count++; 2427 2428 if (ifmgd->connection_loss) { 2429 sdata_info(sdata, "Connection to AP %pM lost\n", 2430 ifmgd->bssid); 2431 __ieee80211_disconnect(sdata); 2432 } else { 2433 ieee80211_mgd_probe_ap(sdata, true); 2434 } 2435 } 2436 2437 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2438 { 2439 struct ieee80211_sub_if_data *sdata = 2440 container_of(work, struct ieee80211_sub_if_data, 2441 u.mgd.csa_connection_drop_work); 2442 2443 __ieee80211_disconnect(sdata); 2444 } 2445 2446 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2447 { 2448 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2449 struct ieee80211_hw *hw = &sdata->local->hw; 2450 2451 trace_api_beacon_loss(sdata); 2452 2453 sdata->u.mgd.connection_loss = false; 2454 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2455 } 2456 EXPORT_SYMBOL(ieee80211_beacon_loss); 2457 2458 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2459 { 2460 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2461 struct ieee80211_hw *hw = &sdata->local->hw; 2462 2463 trace_api_connection_loss(sdata); 2464 2465 sdata->u.mgd.connection_loss = true; 2466 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2467 } 2468 EXPORT_SYMBOL(ieee80211_connection_loss); 2469 2470 2471 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2472 bool assoc) 2473 { 2474 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2475 2476 sdata_assert_lock(sdata); 2477 2478 if (!assoc) { 2479 /* 2480 * we are not authenticated yet, the only timer that could be 2481 * running is the timeout for the authentication response which 2482 * which is not relevant anymore. 2483 */ 2484 del_timer_sync(&sdata->u.mgd.timer); 2485 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2486 2487 eth_zero_addr(sdata->u.mgd.bssid); 2488 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2489 sdata->u.mgd.flags = 0; 2490 mutex_lock(&sdata->local->mtx); 2491 ieee80211_vif_release_channel(sdata); 2492 mutex_unlock(&sdata->local->mtx); 2493 } 2494 2495 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2496 kfree(auth_data); 2497 sdata->u.mgd.auth_data = NULL; 2498 } 2499 2500 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2501 bool assoc, bool abandon) 2502 { 2503 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2504 2505 sdata_assert_lock(sdata); 2506 2507 if (!assoc) { 2508 /* 2509 * we are not associated yet, the only timer that could be 2510 * running is the timeout for the association response which 2511 * which is not relevant anymore. 2512 */ 2513 del_timer_sync(&sdata->u.mgd.timer); 2514 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2515 2516 eth_zero_addr(sdata->u.mgd.bssid); 2517 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2518 sdata->u.mgd.flags = 0; 2519 sdata->vif.mu_mimo_owner = false; 2520 2521 mutex_lock(&sdata->local->mtx); 2522 ieee80211_vif_release_channel(sdata); 2523 mutex_unlock(&sdata->local->mtx); 2524 2525 if (abandon) 2526 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2527 } 2528 2529 kfree(assoc_data); 2530 sdata->u.mgd.assoc_data = NULL; 2531 } 2532 2533 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2534 struct ieee80211_mgmt *mgmt, size_t len) 2535 { 2536 struct ieee80211_local *local = sdata->local; 2537 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2538 u8 *pos; 2539 struct ieee802_11_elems elems; 2540 u32 tx_flags = 0; 2541 2542 pos = mgmt->u.auth.variable; 2543 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2544 if (!elems.challenge) 2545 return; 2546 auth_data->expected_transaction = 4; 2547 drv_mgd_prepare_tx(sdata->local, sdata); 2548 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2549 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2550 IEEE80211_TX_INTFL_MLME_CONN_TX; 2551 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2552 elems.challenge - 2, elems.challenge_len + 2, 2553 auth_data->bss->bssid, auth_data->bss->bssid, 2554 auth_data->key, auth_data->key_len, 2555 auth_data->key_idx, tx_flags); 2556 } 2557 2558 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2559 struct ieee80211_mgmt *mgmt, size_t len) 2560 { 2561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2562 u8 bssid[ETH_ALEN]; 2563 u16 auth_alg, auth_transaction, status_code; 2564 struct sta_info *sta; 2565 struct ieee80211_event event = { 2566 .type = MLME_EVENT, 2567 .u.mlme.data = AUTH_EVENT, 2568 }; 2569 2570 sdata_assert_lock(sdata); 2571 2572 if (len < 24 + 6) 2573 return; 2574 2575 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2576 return; 2577 2578 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2579 2580 if (!ether_addr_equal(bssid, mgmt->bssid)) 2581 return; 2582 2583 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2584 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2585 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2586 2587 if (auth_alg != ifmgd->auth_data->algorithm || 2588 auth_transaction != ifmgd->auth_data->expected_transaction) { 2589 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2590 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2591 auth_transaction, 2592 ifmgd->auth_data->expected_transaction); 2593 return; 2594 } 2595 2596 if (status_code != WLAN_STATUS_SUCCESS) { 2597 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2598 mgmt->sa, status_code); 2599 ieee80211_destroy_auth_data(sdata, false); 2600 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2601 event.u.mlme.status = MLME_DENIED; 2602 event.u.mlme.reason = status_code; 2603 drv_event_callback(sdata->local, sdata, &event); 2604 return; 2605 } 2606 2607 switch (ifmgd->auth_data->algorithm) { 2608 case WLAN_AUTH_OPEN: 2609 case WLAN_AUTH_LEAP: 2610 case WLAN_AUTH_FT: 2611 case WLAN_AUTH_SAE: 2612 case WLAN_AUTH_FILS_SK: 2613 case WLAN_AUTH_FILS_SK_PFS: 2614 case WLAN_AUTH_FILS_PK: 2615 break; 2616 case WLAN_AUTH_SHARED_KEY: 2617 if (ifmgd->auth_data->expected_transaction != 4) { 2618 ieee80211_auth_challenge(sdata, mgmt, len); 2619 /* need another frame */ 2620 return; 2621 } 2622 break; 2623 default: 2624 WARN_ONCE(1, "invalid auth alg %d", 2625 ifmgd->auth_data->algorithm); 2626 return; 2627 } 2628 2629 event.u.mlme.status = MLME_SUCCESS; 2630 drv_event_callback(sdata->local, sdata, &event); 2631 sdata_info(sdata, "authenticated\n"); 2632 ifmgd->auth_data->done = true; 2633 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2634 ifmgd->auth_data->timeout_started = true; 2635 run_again(sdata, ifmgd->auth_data->timeout); 2636 2637 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2638 ifmgd->auth_data->expected_transaction != 2) { 2639 /* 2640 * Report auth frame to user space for processing since another 2641 * round of Authentication frames is still needed. 2642 */ 2643 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2644 return; 2645 } 2646 2647 /* move station state to auth */ 2648 mutex_lock(&sdata->local->sta_mtx); 2649 sta = sta_info_get(sdata, bssid); 2650 if (!sta) { 2651 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2652 goto out_err; 2653 } 2654 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2655 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2656 goto out_err; 2657 } 2658 mutex_unlock(&sdata->local->sta_mtx); 2659 2660 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2661 return; 2662 out_err: 2663 mutex_unlock(&sdata->local->sta_mtx); 2664 /* ignore frame -- wait for timeout */ 2665 } 2666 2667 #define case_WLAN(type) \ 2668 case WLAN_REASON_##type: return #type 2669 2670 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2671 { 2672 switch (reason_code) { 2673 case_WLAN(UNSPECIFIED); 2674 case_WLAN(PREV_AUTH_NOT_VALID); 2675 case_WLAN(DEAUTH_LEAVING); 2676 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2677 case_WLAN(DISASSOC_AP_BUSY); 2678 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2679 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2680 case_WLAN(DISASSOC_STA_HAS_LEFT); 2681 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2682 case_WLAN(DISASSOC_BAD_POWER); 2683 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2684 case_WLAN(INVALID_IE); 2685 case_WLAN(MIC_FAILURE); 2686 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2687 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2688 case_WLAN(IE_DIFFERENT); 2689 case_WLAN(INVALID_GROUP_CIPHER); 2690 case_WLAN(INVALID_PAIRWISE_CIPHER); 2691 case_WLAN(INVALID_AKMP); 2692 case_WLAN(UNSUPP_RSN_VERSION); 2693 case_WLAN(INVALID_RSN_IE_CAP); 2694 case_WLAN(IEEE8021X_FAILED); 2695 case_WLAN(CIPHER_SUITE_REJECTED); 2696 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2697 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2698 case_WLAN(DISASSOC_LOW_ACK); 2699 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2700 case_WLAN(QSTA_LEAVE_QBSS); 2701 case_WLAN(QSTA_NOT_USE); 2702 case_WLAN(QSTA_REQUIRE_SETUP); 2703 case_WLAN(QSTA_TIMEOUT); 2704 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2705 case_WLAN(MESH_PEER_CANCELED); 2706 case_WLAN(MESH_MAX_PEERS); 2707 case_WLAN(MESH_CONFIG); 2708 case_WLAN(MESH_CLOSE); 2709 case_WLAN(MESH_MAX_RETRIES); 2710 case_WLAN(MESH_CONFIRM_TIMEOUT); 2711 case_WLAN(MESH_INVALID_GTK); 2712 case_WLAN(MESH_INCONSISTENT_PARAM); 2713 case_WLAN(MESH_INVALID_SECURITY); 2714 case_WLAN(MESH_PATH_ERROR); 2715 case_WLAN(MESH_PATH_NOFORWARD); 2716 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2717 case_WLAN(MAC_EXISTS_IN_MBSS); 2718 case_WLAN(MESH_CHAN_REGULATORY); 2719 case_WLAN(MESH_CHAN); 2720 default: return "<unknown>"; 2721 } 2722 } 2723 2724 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2725 struct ieee80211_mgmt *mgmt, size_t len) 2726 { 2727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2728 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2729 2730 sdata_assert_lock(sdata); 2731 2732 if (len < 24 + 2) 2733 return; 2734 2735 if (ifmgd->associated && 2736 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2737 const u8 *bssid = ifmgd->associated->bssid; 2738 2739 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2740 bssid, reason_code, 2741 ieee80211_get_reason_code_string(reason_code)); 2742 2743 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2744 2745 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2746 reason_code); 2747 return; 2748 } 2749 2750 if (ifmgd->assoc_data && 2751 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2752 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2753 2754 sdata_info(sdata, 2755 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2756 bssid, reason_code, 2757 ieee80211_get_reason_code_string(reason_code)); 2758 2759 ieee80211_destroy_assoc_data(sdata, false, true); 2760 2761 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2762 return; 2763 } 2764 } 2765 2766 2767 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2768 struct ieee80211_mgmt *mgmt, size_t len) 2769 { 2770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2771 u16 reason_code; 2772 2773 sdata_assert_lock(sdata); 2774 2775 if (len < 24 + 2) 2776 return; 2777 2778 if (!ifmgd->associated || 2779 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2780 return; 2781 2782 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2783 2784 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 2785 mgmt->sa, reason_code, 2786 ieee80211_get_reason_code_string(reason_code)); 2787 2788 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2789 2790 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2791 } 2792 2793 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2794 u8 *supp_rates, unsigned int supp_rates_len, 2795 u32 *rates, u32 *basic_rates, 2796 bool *have_higher_than_11mbit, 2797 int *min_rate, int *min_rate_index, 2798 int shift) 2799 { 2800 int i, j; 2801 2802 for (i = 0; i < supp_rates_len; i++) { 2803 int rate = supp_rates[i] & 0x7f; 2804 bool is_basic = !!(supp_rates[i] & 0x80); 2805 2806 if ((rate * 5 * (1 << shift)) > 110) 2807 *have_higher_than_11mbit = true; 2808 2809 /* 2810 * Skip HT and VHT BSS membership selectors since they're not 2811 * rates. 2812 * 2813 * Note: Even though the membership selector and the basic 2814 * rate flag share the same bit, they are not exactly 2815 * the same. 2816 */ 2817 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 2818 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) 2819 continue; 2820 2821 for (j = 0; j < sband->n_bitrates; j++) { 2822 struct ieee80211_rate *br; 2823 int brate; 2824 2825 br = &sband->bitrates[j]; 2826 2827 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2828 if (brate == rate) { 2829 *rates |= BIT(j); 2830 if (is_basic) 2831 *basic_rates |= BIT(j); 2832 if ((rate * 5) < *min_rate) { 2833 *min_rate = rate * 5; 2834 *min_rate_index = j; 2835 } 2836 break; 2837 } 2838 } 2839 } 2840 } 2841 2842 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2843 struct cfg80211_bss *cbss, 2844 struct ieee80211_mgmt *mgmt, size_t len) 2845 { 2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2847 struct ieee80211_local *local = sdata->local; 2848 struct ieee80211_supported_band *sband; 2849 struct sta_info *sta; 2850 u8 *pos; 2851 u16 capab_info, aid; 2852 struct ieee802_11_elems elems; 2853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2854 const struct cfg80211_bss_ies *bss_ies = NULL; 2855 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2856 u32 changed = 0; 2857 int err; 2858 bool ret; 2859 2860 /* AssocResp and ReassocResp have identical structure */ 2861 2862 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2863 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2864 2865 /* 2866 * The 5 MSB of the AID field are reserved 2867 * (802.11-2016 9.4.1.8 AID field) 2868 */ 2869 aid &= 0x7ff; 2870 2871 ifmgd->broken_ap = false; 2872 2873 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2874 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2875 aid); 2876 aid = 0; 2877 ifmgd->broken_ap = true; 2878 } 2879 2880 pos = mgmt->u.assoc_resp.variable; 2881 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2882 2883 if (!elems.supp_rates) { 2884 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2885 return false; 2886 } 2887 2888 ifmgd->aid = aid; 2889 ifmgd->tdls_chan_switch_prohibited = 2890 elems.ext_capab && elems.ext_capab_len >= 5 && 2891 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2892 2893 /* 2894 * Some APs are erroneously not including some information in their 2895 * (re)association response frames. Try to recover by using the data 2896 * from the beacon or probe response. This seems to afflict mobile 2897 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2898 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2899 */ 2900 if ((assoc_data->wmm && !elems.wmm_param) || 2901 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2902 (!elems.ht_cap_elem || !elems.ht_operation)) || 2903 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2904 (!elems.vht_cap_elem || !elems.vht_operation))) { 2905 const struct cfg80211_bss_ies *ies; 2906 struct ieee802_11_elems bss_elems; 2907 2908 rcu_read_lock(); 2909 ies = rcu_dereference(cbss->ies); 2910 if (ies) 2911 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2912 GFP_ATOMIC); 2913 rcu_read_unlock(); 2914 if (!bss_ies) 2915 return false; 2916 2917 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2918 false, &bss_elems); 2919 if (assoc_data->wmm && 2920 !elems.wmm_param && bss_elems.wmm_param) { 2921 elems.wmm_param = bss_elems.wmm_param; 2922 sdata_info(sdata, 2923 "AP bug: WMM param missing from AssocResp\n"); 2924 } 2925 2926 /* 2927 * Also check if we requested HT/VHT, otherwise the AP doesn't 2928 * have to include the IEs in the (re)association response. 2929 */ 2930 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2931 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2932 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2933 sdata_info(sdata, 2934 "AP bug: HT capability missing from AssocResp\n"); 2935 } 2936 if (!elems.ht_operation && bss_elems.ht_operation && 2937 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2938 elems.ht_operation = bss_elems.ht_operation; 2939 sdata_info(sdata, 2940 "AP bug: HT operation missing from AssocResp\n"); 2941 } 2942 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2943 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2944 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2945 sdata_info(sdata, 2946 "AP bug: VHT capa missing from AssocResp\n"); 2947 } 2948 if (!elems.vht_operation && bss_elems.vht_operation && 2949 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2950 elems.vht_operation = bss_elems.vht_operation; 2951 sdata_info(sdata, 2952 "AP bug: VHT operation missing from AssocResp\n"); 2953 } 2954 } 2955 2956 /* 2957 * We previously checked these in the beacon/probe response, so 2958 * they should be present here. This is just a safety net. 2959 */ 2960 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2961 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2962 sdata_info(sdata, 2963 "HT AP is missing WMM params or HT capability/operation\n"); 2964 ret = false; 2965 goto out; 2966 } 2967 2968 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2969 (!elems.vht_cap_elem || !elems.vht_operation)) { 2970 sdata_info(sdata, 2971 "VHT AP is missing VHT capability/operation\n"); 2972 ret = false; 2973 goto out; 2974 } 2975 2976 mutex_lock(&sdata->local->sta_mtx); 2977 /* 2978 * station info was already allocated and inserted before 2979 * the association and should be available to us 2980 */ 2981 sta = sta_info_get(sdata, cbss->bssid); 2982 if (WARN_ON(!sta)) { 2983 mutex_unlock(&sdata->local->sta_mtx); 2984 ret = false; 2985 goto out; 2986 } 2987 2988 sband = ieee80211_get_sband(sdata); 2989 if (!sband) { 2990 mutex_unlock(&sdata->local->sta_mtx); 2991 ret = false; 2992 goto out; 2993 } 2994 2995 /* Set up internal HT/VHT capabilities */ 2996 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 2997 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 2998 elems.ht_cap_elem, sta); 2999 3000 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3001 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3002 elems.vht_cap_elem, sta); 3003 3004 /* 3005 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3006 * in their association response, so ignore that data for our own 3007 * configuration. If it changed since the last beacon, we'll get the 3008 * next beacon and update then. 3009 */ 3010 3011 /* 3012 * If an operating mode notification IE is present, override the 3013 * NSS calculation (that would be done in rate_control_rate_init()) 3014 * and use the # of streams from that element. 3015 */ 3016 if (elems.opmode_notif && 3017 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3018 u8 nss; 3019 3020 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3021 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3022 nss += 1; 3023 sta->sta.rx_nss = nss; 3024 } 3025 3026 rate_control_rate_init(sta); 3027 3028 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3029 set_sta_flag(sta, WLAN_STA_MFP); 3030 sta->sta.mfp = true; 3031 } else { 3032 sta->sta.mfp = false; 3033 } 3034 3035 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3036 3037 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3038 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3039 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3040 if (err) { 3041 sdata_info(sdata, 3042 "failed to move station %pM to desired state\n", 3043 sta->sta.addr); 3044 WARN_ON(__sta_info_destroy(sta)); 3045 mutex_unlock(&sdata->local->sta_mtx); 3046 ret = false; 3047 goto out; 3048 } 3049 3050 mutex_unlock(&sdata->local->sta_mtx); 3051 3052 /* 3053 * Always handle WMM once after association regardless 3054 * of the first value the AP uses. Setting -1 here has 3055 * that effect because the AP values is an unsigned 3056 * 4-bit value. 3057 */ 3058 ifmgd->wmm_last_param_set = -1; 3059 3060 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3061 ieee80211_set_wmm_default(sdata, false, false); 3062 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3063 elems.wmm_param_len)) { 3064 /* still enable QoS since we might have HT/VHT */ 3065 ieee80211_set_wmm_default(sdata, false, true); 3066 /* set the disable-WMM flag in this case to disable 3067 * tracking WMM parameter changes in the beacon if 3068 * the parameters weren't actually valid. Doing so 3069 * avoids changing parameters very strangely when 3070 * the AP is going back and forth between valid and 3071 * invalid parameters. 3072 */ 3073 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3074 } 3075 changed |= BSS_CHANGED_QOS; 3076 3077 if (elems.max_idle_period_ie) { 3078 bss_conf->max_idle_period = 3079 le16_to_cpu(elems.max_idle_period_ie->max_idle_period); 3080 bss_conf->protected_keep_alive = 3081 !!(elems.max_idle_period_ie->idle_options & 3082 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3083 changed |= BSS_CHANGED_KEEP_ALIVE; 3084 } else { 3085 bss_conf->max_idle_period = 0; 3086 bss_conf->protected_keep_alive = false; 3087 } 3088 3089 /* set AID and assoc capability, 3090 * ieee80211_set_associated() will tell the driver */ 3091 bss_conf->aid = aid; 3092 bss_conf->assoc_capability = capab_info; 3093 ieee80211_set_associated(sdata, cbss, changed); 3094 3095 /* 3096 * If we're using 4-addr mode, let the AP know that we're 3097 * doing so, so that it can create the STA VLAN on its side 3098 */ 3099 if (ifmgd->use_4addr) 3100 ieee80211_send_4addr_nullfunc(local, sdata); 3101 3102 /* 3103 * Start timer to probe the connection to the AP now. 3104 * Also start the timer that will detect beacon loss. 3105 */ 3106 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3107 ieee80211_sta_reset_beacon_monitor(sdata); 3108 3109 ret = true; 3110 out: 3111 kfree(bss_ies); 3112 return ret; 3113 } 3114 3115 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3116 struct ieee80211_mgmt *mgmt, 3117 size_t len) 3118 { 3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3121 u16 capab_info, status_code, aid; 3122 struct ieee802_11_elems elems; 3123 int ac, uapsd_queues = -1; 3124 u8 *pos; 3125 bool reassoc; 3126 struct cfg80211_bss *bss; 3127 struct ieee80211_event event = { 3128 .type = MLME_EVENT, 3129 .u.mlme.data = ASSOC_EVENT, 3130 }; 3131 3132 sdata_assert_lock(sdata); 3133 3134 if (!assoc_data) 3135 return; 3136 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3137 return; 3138 3139 /* 3140 * AssocResp and ReassocResp have identical structure, so process both 3141 * of them in this function. 3142 */ 3143 3144 if (len < 24 + 6) 3145 return; 3146 3147 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3148 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3149 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3150 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3151 3152 sdata_info(sdata, 3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3154 reassoc ? "Rea" : "A", mgmt->sa, 3155 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3156 3157 if (assoc_data->fils_kek_len && 3158 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3159 return; 3160 3161 pos = mgmt->u.assoc_resp.variable; 3162 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3163 3164 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3165 elems.timeout_int && 3166 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3167 u32 tu, ms; 3168 tu = le32_to_cpu(elems.timeout_int->value); 3169 ms = tu * 1024 / 1000; 3170 sdata_info(sdata, 3171 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3172 mgmt->sa, tu, ms); 3173 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3174 assoc_data->timeout_started = true; 3175 if (ms > IEEE80211_ASSOC_TIMEOUT) 3176 run_again(sdata, assoc_data->timeout); 3177 return; 3178 } 3179 3180 bss = assoc_data->bss; 3181 3182 if (status_code != WLAN_STATUS_SUCCESS) { 3183 sdata_info(sdata, "%pM denied association (code=%d)\n", 3184 mgmt->sa, status_code); 3185 ieee80211_destroy_assoc_data(sdata, false, false); 3186 event.u.mlme.status = MLME_DENIED; 3187 event.u.mlme.reason = status_code; 3188 drv_event_callback(sdata->local, sdata, &event); 3189 } else { 3190 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3191 /* oops -- internal error -- send timeout for now */ 3192 ieee80211_destroy_assoc_data(sdata, false, false); 3193 cfg80211_assoc_timeout(sdata->dev, bss); 3194 return; 3195 } 3196 event.u.mlme.status = MLME_SUCCESS; 3197 drv_event_callback(sdata->local, sdata, &event); 3198 sdata_info(sdata, "associated\n"); 3199 3200 /* 3201 * destroy assoc_data afterwards, as otherwise an idle 3202 * recalc after assoc_data is NULL but before associated 3203 * is set can cause the interface to go idle 3204 */ 3205 ieee80211_destroy_assoc_data(sdata, true, false); 3206 3207 /* get uapsd queues configuration */ 3208 uapsd_queues = 0; 3209 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3210 if (sdata->tx_conf[ac].uapsd) 3211 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3212 } 3213 3214 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3215 } 3216 3217 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3218 struct ieee80211_mgmt *mgmt, size_t len, 3219 struct ieee80211_rx_status *rx_status, 3220 struct ieee802_11_elems *elems) 3221 { 3222 struct ieee80211_local *local = sdata->local; 3223 struct ieee80211_bss *bss; 3224 struct ieee80211_channel *channel; 3225 3226 sdata_assert_lock(sdata); 3227 3228 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3229 if (!channel) 3230 return; 3231 3232 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3233 channel); 3234 if (bss) { 3235 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3236 ieee80211_rx_bss_put(local, bss); 3237 } 3238 } 3239 3240 3241 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3242 struct sk_buff *skb) 3243 { 3244 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3245 struct ieee80211_if_managed *ifmgd; 3246 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3247 size_t baselen, len = skb->len; 3248 struct ieee802_11_elems elems; 3249 3250 ifmgd = &sdata->u.mgd; 3251 3252 sdata_assert_lock(sdata); 3253 3254 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3255 return; /* ignore ProbeResp to foreign address */ 3256 3257 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3258 if (baselen > len) 3259 return; 3260 3261 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3262 false, &elems); 3263 3264 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3265 3266 if (ifmgd->associated && 3267 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3268 ieee80211_reset_ap_probe(sdata); 3269 } 3270 3271 /* 3272 * This is the canonical list of information elements we care about, 3273 * the filter code also gives us all changes to the Microsoft OUI 3274 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3275 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3276 * changes to requested client power. 3277 * 3278 * We implement beacon filtering in software since that means we can 3279 * avoid processing the frame here and in cfg80211, and userspace 3280 * will not be able to tell whether the hardware supports it or not. 3281 * 3282 * XXX: This list needs to be dynamic -- userspace needs to be able to 3283 * add items it requires. It also needs to be able to tell us to 3284 * look out for other vendor IEs. 3285 */ 3286 static const u64 care_about_ies = 3287 (1ULL << WLAN_EID_COUNTRY) | 3288 (1ULL << WLAN_EID_ERP_INFO) | 3289 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3290 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3291 (1ULL << WLAN_EID_HT_CAPABILITY) | 3292 (1ULL << WLAN_EID_HT_OPERATION) | 3293 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3294 3295 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3296 struct ieee80211_mgmt *mgmt, size_t len, 3297 struct ieee80211_rx_status *rx_status) 3298 { 3299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3300 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3301 size_t baselen; 3302 struct ieee802_11_elems elems; 3303 struct ieee80211_local *local = sdata->local; 3304 struct ieee80211_chanctx_conf *chanctx_conf; 3305 struct ieee80211_channel *chan; 3306 struct sta_info *sta; 3307 u32 changed = 0; 3308 bool erp_valid; 3309 u8 erp_value = 0; 3310 u32 ncrc; 3311 u8 *bssid; 3312 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3313 3314 sdata_assert_lock(sdata); 3315 3316 /* Process beacon from the current BSS */ 3317 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3318 if (baselen > len) 3319 return; 3320 3321 rcu_read_lock(); 3322 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3323 if (!chanctx_conf) { 3324 rcu_read_unlock(); 3325 return; 3326 } 3327 3328 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3329 rcu_read_unlock(); 3330 return; 3331 } 3332 chan = chanctx_conf->def.chan; 3333 rcu_read_unlock(); 3334 3335 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3336 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3337 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3338 len - baselen, false, &elems); 3339 3340 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3341 if (elems.tim && !elems.parse_error) { 3342 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3343 ifmgd->dtim_period = tim_ie->dtim_period; 3344 } 3345 ifmgd->have_beacon = true; 3346 ifmgd->assoc_data->need_beacon = false; 3347 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3348 sdata->vif.bss_conf.sync_tsf = 3349 le64_to_cpu(mgmt->u.beacon.timestamp); 3350 sdata->vif.bss_conf.sync_device_ts = 3351 rx_status->device_timestamp; 3352 if (elems.tim) 3353 sdata->vif.bss_conf.sync_dtim_count = 3354 elems.tim->dtim_count; 3355 else 3356 sdata->vif.bss_conf.sync_dtim_count = 0; 3357 } 3358 /* continue assoc process */ 3359 ifmgd->assoc_data->timeout = jiffies; 3360 ifmgd->assoc_data->timeout_started = true; 3361 run_again(sdata, ifmgd->assoc_data->timeout); 3362 return; 3363 } 3364 3365 if (!ifmgd->associated || 3366 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3367 return; 3368 bssid = ifmgd->associated->bssid; 3369 3370 /* Track average RSSI from the Beacon frames of the current AP */ 3371 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3372 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3373 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3374 ifmgd->last_cqm_event_signal = 0; 3375 ifmgd->count_beacon_signal = 1; 3376 ifmgd->last_ave_beacon_signal = 0; 3377 } else { 3378 ifmgd->count_beacon_signal++; 3379 } 3380 3381 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3382 3383 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3384 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3385 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3386 int last_sig = ifmgd->last_ave_beacon_signal; 3387 struct ieee80211_event event = { 3388 .type = RSSI_EVENT, 3389 }; 3390 3391 /* 3392 * if signal crosses either of the boundaries, invoke callback 3393 * with appropriate parameters 3394 */ 3395 if (sig > ifmgd->rssi_max_thold && 3396 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3397 ifmgd->last_ave_beacon_signal = sig; 3398 event.u.rssi.data = RSSI_EVENT_HIGH; 3399 drv_event_callback(local, sdata, &event); 3400 } else if (sig < ifmgd->rssi_min_thold && 3401 (last_sig >= ifmgd->rssi_max_thold || 3402 last_sig == 0)) { 3403 ifmgd->last_ave_beacon_signal = sig; 3404 event.u.rssi.data = RSSI_EVENT_LOW; 3405 drv_event_callback(local, sdata, &event); 3406 } 3407 } 3408 3409 if (bss_conf->cqm_rssi_thold && 3410 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3411 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3412 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3413 int last_event = ifmgd->last_cqm_event_signal; 3414 int thold = bss_conf->cqm_rssi_thold; 3415 int hyst = bss_conf->cqm_rssi_hyst; 3416 3417 if (sig < thold && 3418 (last_event == 0 || sig < last_event - hyst)) { 3419 ifmgd->last_cqm_event_signal = sig; 3420 ieee80211_cqm_rssi_notify( 3421 &sdata->vif, 3422 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3423 sig, GFP_KERNEL); 3424 } else if (sig > thold && 3425 (last_event == 0 || sig > last_event + hyst)) { 3426 ifmgd->last_cqm_event_signal = sig; 3427 ieee80211_cqm_rssi_notify( 3428 &sdata->vif, 3429 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3430 sig, GFP_KERNEL); 3431 } 3432 } 3433 3434 if (bss_conf->cqm_rssi_low && 3435 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3436 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3437 int last_event = ifmgd->last_cqm_event_signal; 3438 int low = bss_conf->cqm_rssi_low; 3439 int high = bss_conf->cqm_rssi_high; 3440 3441 if (sig < low && 3442 (last_event == 0 || last_event >= low)) { 3443 ifmgd->last_cqm_event_signal = sig; 3444 ieee80211_cqm_rssi_notify( 3445 &sdata->vif, 3446 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3447 sig, GFP_KERNEL); 3448 } else if (sig > high && 3449 (last_event == 0 || last_event <= high)) { 3450 ifmgd->last_cqm_event_signal = sig; 3451 ieee80211_cqm_rssi_notify( 3452 &sdata->vif, 3453 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3454 sig, GFP_KERNEL); 3455 } 3456 } 3457 3458 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3459 mlme_dbg_ratelimited(sdata, 3460 "cancelling AP probe due to a received beacon\n"); 3461 ieee80211_reset_ap_probe(sdata); 3462 } 3463 3464 /* 3465 * Push the beacon loss detection into the future since 3466 * we are processing a beacon from the AP just now. 3467 */ 3468 ieee80211_sta_reset_beacon_monitor(sdata); 3469 3470 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3471 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3472 len - baselen, false, &elems, 3473 care_about_ies, ncrc); 3474 3475 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3476 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3477 if (local->hw.conf.dynamic_ps_timeout > 0) { 3478 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3479 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3480 ieee80211_hw_config(local, 3481 IEEE80211_CONF_CHANGE_PS); 3482 } 3483 ieee80211_send_nullfunc(local, sdata, false); 3484 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3485 local->pspolling = true; 3486 3487 /* 3488 * Here is assumed that the driver will be 3489 * able to send ps-poll frame and receive a 3490 * response even though power save mode is 3491 * enabled, but some drivers might require 3492 * to disable power save here. This needs 3493 * to be investigated. 3494 */ 3495 ieee80211_send_pspoll(local, sdata); 3496 } 3497 } 3498 3499 if (sdata->vif.p2p || 3500 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3501 struct ieee80211_p2p_noa_attr noa = {}; 3502 int ret; 3503 3504 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3505 len - baselen, 3506 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3507 (u8 *) &noa, sizeof(noa)); 3508 if (ret >= 2) { 3509 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3510 /* valid noa_attr and index changed */ 3511 sdata->u.mgd.p2p_noa_index = noa.index; 3512 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3513 changed |= BSS_CHANGED_P2P_PS; 3514 /* 3515 * make sure we update all information, the CRC 3516 * mechanism doesn't look at P2P attributes. 3517 */ 3518 ifmgd->beacon_crc_valid = false; 3519 } 3520 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3521 /* noa_attr not found and we had valid noa_attr before */ 3522 sdata->u.mgd.p2p_noa_index = -1; 3523 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3524 changed |= BSS_CHANGED_P2P_PS; 3525 ifmgd->beacon_crc_valid = false; 3526 } 3527 } 3528 3529 if (ifmgd->csa_waiting_bcn) 3530 ieee80211_chswitch_post_beacon(sdata); 3531 3532 /* 3533 * Update beacon timing and dtim count on every beacon appearance. This 3534 * will allow the driver to use the most updated values. Do it before 3535 * comparing this one with last received beacon. 3536 * IMPORTANT: These parameters would possibly be out of sync by the time 3537 * the driver will use them. The synchronized view is currently 3538 * guaranteed only in certain callbacks. 3539 */ 3540 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3541 sdata->vif.bss_conf.sync_tsf = 3542 le64_to_cpu(mgmt->u.beacon.timestamp); 3543 sdata->vif.bss_conf.sync_device_ts = 3544 rx_status->device_timestamp; 3545 if (elems.tim) 3546 sdata->vif.bss_conf.sync_dtim_count = 3547 elems.tim->dtim_count; 3548 else 3549 sdata->vif.bss_conf.sync_dtim_count = 0; 3550 } 3551 3552 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3553 return; 3554 ifmgd->beacon_crc = ncrc; 3555 ifmgd->beacon_crc_valid = true; 3556 3557 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3558 3559 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3560 rx_status->device_timestamp, 3561 &elems, true); 3562 3563 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3564 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3565 elems.wmm_param_len)) 3566 changed |= BSS_CHANGED_QOS; 3567 3568 /* 3569 * If we haven't had a beacon before, tell the driver about the 3570 * DTIM period (and beacon timing if desired) now. 3571 */ 3572 if (!ifmgd->have_beacon) { 3573 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3574 if (elems.tim) 3575 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3576 else 3577 bss_conf->dtim_period = 1; 3578 3579 changed |= BSS_CHANGED_BEACON_INFO; 3580 ifmgd->have_beacon = true; 3581 3582 mutex_lock(&local->iflist_mtx); 3583 ieee80211_recalc_ps(local); 3584 mutex_unlock(&local->iflist_mtx); 3585 3586 ieee80211_recalc_ps_vif(sdata); 3587 } 3588 3589 if (elems.erp_info) { 3590 erp_valid = true; 3591 erp_value = elems.erp_info[0]; 3592 } else { 3593 erp_valid = false; 3594 } 3595 changed |= ieee80211_handle_bss_capability(sdata, 3596 le16_to_cpu(mgmt->u.beacon.capab_info), 3597 erp_valid, erp_value); 3598 3599 mutex_lock(&local->sta_mtx); 3600 sta = sta_info_get(sdata, bssid); 3601 3602 if (ieee80211_config_bw(sdata, sta, 3603 elems.ht_cap_elem, elems.ht_operation, 3604 elems.vht_operation, bssid, &changed)) { 3605 mutex_unlock(&local->sta_mtx); 3606 sdata_info(sdata, 3607 "failed to follow AP %pM bandwidth change, disconnect\n", 3608 bssid); 3609 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3610 WLAN_REASON_DEAUTH_LEAVING, 3611 true, deauth_buf); 3612 ieee80211_report_disconnect(sdata, deauth_buf, 3613 sizeof(deauth_buf), true, 3614 WLAN_REASON_DEAUTH_LEAVING); 3615 return; 3616 } 3617 3618 if (sta && elems.opmode_notif) 3619 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3620 rx_status->band); 3621 mutex_unlock(&local->sta_mtx); 3622 3623 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3624 elems.country_elem, 3625 elems.country_elem_len, 3626 elems.pwr_constr_elem, 3627 elems.cisco_dtpc_elem); 3628 3629 ieee80211_bss_info_change_notify(sdata, changed); 3630 } 3631 3632 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3633 struct sk_buff *skb) 3634 { 3635 struct ieee80211_rx_status *rx_status; 3636 struct ieee80211_mgmt *mgmt; 3637 u16 fc; 3638 struct ieee802_11_elems elems; 3639 int ies_len; 3640 3641 rx_status = (struct ieee80211_rx_status *) skb->cb; 3642 mgmt = (struct ieee80211_mgmt *) skb->data; 3643 fc = le16_to_cpu(mgmt->frame_control); 3644 3645 sdata_lock(sdata); 3646 3647 switch (fc & IEEE80211_FCTL_STYPE) { 3648 case IEEE80211_STYPE_BEACON: 3649 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3650 break; 3651 case IEEE80211_STYPE_PROBE_RESP: 3652 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3653 break; 3654 case IEEE80211_STYPE_AUTH: 3655 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3656 break; 3657 case IEEE80211_STYPE_DEAUTH: 3658 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3659 break; 3660 case IEEE80211_STYPE_DISASSOC: 3661 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3662 break; 3663 case IEEE80211_STYPE_ASSOC_RESP: 3664 case IEEE80211_STYPE_REASSOC_RESP: 3665 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3666 break; 3667 case IEEE80211_STYPE_ACTION: 3668 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3669 ies_len = skb->len - 3670 offsetof(struct ieee80211_mgmt, 3671 u.action.u.chan_switch.variable); 3672 3673 if (ies_len < 0) 3674 break; 3675 3676 ieee802_11_parse_elems( 3677 mgmt->u.action.u.chan_switch.variable, 3678 ies_len, true, &elems); 3679 3680 if (elems.parse_error) 3681 break; 3682 3683 ieee80211_sta_process_chanswitch(sdata, 3684 rx_status->mactime, 3685 rx_status->device_timestamp, 3686 &elems, false); 3687 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3688 ies_len = skb->len - 3689 offsetof(struct ieee80211_mgmt, 3690 u.action.u.ext_chan_switch.variable); 3691 3692 if (ies_len < 0) 3693 break; 3694 3695 ieee802_11_parse_elems( 3696 mgmt->u.action.u.ext_chan_switch.variable, 3697 ies_len, true, &elems); 3698 3699 if (elems.parse_error) 3700 break; 3701 3702 /* for the handling code pretend this was also an IE */ 3703 elems.ext_chansw_ie = 3704 &mgmt->u.action.u.ext_chan_switch.data; 3705 3706 ieee80211_sta_process_chanswitch(sdata, 3707 rx_status->mactime, 3708 rx_status->device_timestamp, 3709 &elems, false); 3710 } 3711 break; 3712 } 3713 sdata_unlock(sdata); 3714 } 3715 3716 static void ieee80211_sta_timer(struct timer_list *t) 3717 { 3718 struct ieee80211_sub_if_data *sdata = 3719 from_timer(sdata, t, u.mgd.timer); 3720 3721 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3722 } 3723 3724 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3725 u8 *bssid, u8 reason, bool tx) 3726 { 3727 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3728 3729 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3730 tx, frame_buf); 3731 3732 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3733 reason); 3734 } 3735 3736 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3737 { 3738 struct ieee80211_local *local = sdata->local; 3739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3740 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3741 u32 tx_flags = 0; 3742 u16 trans = 1; 3743 u16 status = 0; 3744 3745 sdata_assert_lock(sdata); 3746 3747 if (WARN_ON_ONCE(!auth_data)) 3748 return -EINVAL; 3749 3750 auth_data->tries++; 3751 3752 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3753 sdata_info(sdata, "authentication with %pM timed out\n", 3754 auth_data->bss->bssid); 3755 3756 /* 3757 * Most likely AP is not in the range so remove the 3758 * bss struct for that AP. 3759 */ 3760 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3761 3762 return -ETIMEDOUT; 3763 } 3764 3765 drv_mgd_prepare_tx(local, sdata); 3766 3767 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3768 auth_data->bss->bssid, auth_data->tries, 3769 IEEE80211_AUTH_MAX_TRIES); 3770 3771 auth_data->expected_transaction = 2; 3772 3773 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3774 trans = auth_data->sae_trans; 3775 status = auth_data->sae_status; 3776 auth_data->expected_transaction = trans; 3777 } 3778 3779 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3780 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3781 IEEE80211_TX_INTFL_MLME_CONN_TX; 3782 3783 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3784 auth_data->data, auth_data->data_len, 3785 auth_data->bss->bssid, 3786 auth_data->bss->bssid, NULL, 0, 0, 3787 tx_flags); 3788 3789 if (tx_flags == 0) { 3790 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3791 auth_data->timeout_started = true; 3792 run_again(sdata, auth_data->timeout); 3793 } else { 3794 auth_data->timeout = 3795 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3796 auth_data->timeout_started = true; 3797 run_again(sdata, auth_data->timeout); 3798 } 3799 3800 return 0; 3801 } 3802 3803 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3804 { 3805 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3806 struct ieee80211_local *local = sdata->local; 3807 3808 sdata_assert_lock(sdata); 3809 3810 assoc_data->tries++; 3811 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3812 sdata_info(sdata, "association with %pM timed out\n", 3813 assoc_data->bss->bssid); 3814 3815 /* 3816 * Most likely AP is not in the range so remove the 3817 * bss struct for that AP. 3818 */ 3819 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3820 3821 return -ETIMEDOUT; 3822 } 3823 3824 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3825 assoc_data->bss->bssid, assoc_data->tries, 3826 IEEE80211_ASSOC_MAX_TRIES); 3827 ieee80211_send_assoc(sdata); 3828 3829 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3830 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3831 assoc_data->timeout_started = true; 3832 run_again(sdata, assoc_data->timeout); 3833 } else { 3834 assoc_data->timeout = 3835 round_jiffies_up(jiffies + 3836 IEEE80211_ASSOC_TIMEOUT_LONG); 3837 assoc_data->timeout_started = true; 3838 run_again(sdata, assoc_data->timeout); 3839 } 3840 3841 return 0; 3842 } 3843 3844 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3845 __le16 fc, bool acked) 3846 { 3847 struct ieee80211_local *local = sdata->local; 3848 3849 sdata->u.mgd.status_fc = fc; 3850 sdata->u.mgd.status_acked = acked; 3851 sdata->u.mgd.status_received = true; 3852 3853 ieee80211_queue_work(&local->hw, &sdata->work); 3854 } 3855 3856 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3857 { 3858 struct ieee80211_local *local = sdata->local; 3859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3860 3861 sdata_lock(sdata); 3862 3863 if (ifmgd->status_received) { 3864 __le16 fc = ifmgd->status_fc; 3865 bool status_acked = ifmgd->status_acked; 3866 3867 ifmgd->status_received = false; 3868 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3869 if (status_acked) { 3870 ifmgd->auth_data->timeout = 3871 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3872 run_again(sdata, ifmgd->auth_data->timeout); 3873 } else { 3874 ifmgd->auth_data->timeout = jiffies - 1; 3875 } 3876 ifmgd->auth_data->timeout_started = true; 3877 } else if (ifmgd->assoc_data && 3878 (ieee80211_is_assoc_req(fc) || 3879 ieee80211_is_reassoc_req(fc))) { 3880 if (status_acked) { 3881 ifmgd->assoc_data->timeout = 3882 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3883 run_again(sdata, ifmgd->assoc_data->timeout); 3884 } else { 3885 ifmgd->assoc_data->timeout = jiffies - 1; 3886 } 3887 ifmgd->assoc_data->timeout_started = true; 3888 } 3889 } 3890 3891 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3892 time_after(jiffies, ifmgd->auth_data->timeout)) { 3893 if (ifmgd->auth_data->done) { 3894 /* 3895 * ok ... we waited for assoc but userspace didn't, 3896 * so let's just kill the auth data 3897 */ 3898 ieee80211_destroy_auth_data(sdata, false); 3899 } else if (ieee80211_auth(sdata)) { 3900 u8 bssid[ETH_ALEN]; 3901 struct ieee80211_event event = { 3902 .type = MLME_EVENT, 3903 .u.mlme.data = AUTH_EVENT, 3904 .u.mlme.status = MLME_TIMEOUT, 3905 }; 3906 3907 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3908 3909 ieee80211_destroy_auth_data(sdata, false); 3910 3911 cfg80211_auth_timeout(sdata->dev, bssid); 3912 drv_event_callback(sdata->local, sdata, &event); 3913 } 3914 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3915 run_again(sdata, ifmgd->auth_data->timeout); 3916 3917 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3918 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3919 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3920 ieee80211_do_assoc(sdata)) { 3921 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3922 struct ieee80211_event event = { 3923 .type = MLME_EVENT, 3924 .u.mlme.data = ASSOC_EVENT, 3925 .u.mlme.status = MLME_TIMEOUT, 3926 }; 3927 3928 ieee80211_destroy_assoc_data(sdata, false, false); 3929 cfg80211_assoc_timeout(sdata->dev, bss); 3930 drv_event_callback(sdata->local, sdata, &event); 3931 } 3932 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3933 run_again(sdata, ifmgd->assoc_data->timeout); 3934 3935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3936 ifmgd->associated) { 3937 u8 bssid[ETH_ALEN]; 3938 int max_tries; 3939 3940 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3941 3942 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3943 max_tries = max_nullfunc_tries; 3944 else 3945 max_tries = max_probe_tries; 3946 3947 /* ACK received for nullfunc probing frame */ 3948 if (!ifmgd->probe_send_count) 3949 ieee80211_reset_ap_probe(sdata); 3950 else if (ifmgd->nullfunc_failed) { 3951 if (ifmgd->probe_send_count < max_tries) { 3952 mlme_dbg(sdata, 3953 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3954 bssid, ifmgd->probe_send_count, 3955 max_tries); 3956 ieee80211_mgd_probe_ap_send(sdata); 3957 } else { 3958 mlme_dbg(sdata, 3959 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3960 bssid); 3961 ieee80211_sta_connection_lost(sdata, bssid, 3962 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3963 false); 3964 } 3965 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3966 run_again(sdata, ifmgd->probe_timeout); 3967 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3968 mlme_dbg(sdata, 3969 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3970 bssid, probe_wait_ms); 3971 ieee80211_sta_connection_lost(sdata, bssid, 3972 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3973 } else if (ifmgd->probe_send_count < max_tries) { 3974 mlme_dbg(sdata, 3975 "No probe response from AP %pM after %dms, try %d/%i\n", 3976 bssid, probe_wait_ms, 3977 ifmgd->probe_send_count, max_tries); 3978 ieee80211_mgd_probe_ap_send(sdata); 3979 } else { 3980 /* 3981 * We actually lost the connection ... or did we? 3982 * Let's make sure! 3983 */ 3984 mlme_dbg(sdata, 3985 "No probe response from AP %pM after %dms, disconnecting.\n", 3986 bssid, probe_wait_ms); 3987 3988 ieee80211_sta_connection_lost(sdata, bssid, 3989 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3990 } 3991 } 3992 3993 sdata_unlock(sdata); 3994 } 3995 3996 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 3997 { 3998 struct ieee80211_sub_if_data *sdata = 3999 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4001 4002 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4003 return; 4004 4005 sdata->u.mgd.connection_loss = false; 4006 ieee80211_queue_work(&sdata->local->hw, 4007 &sdata->u.mgd.beacon_connection_loss_work); 4008 } 4009 4010 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4011 { 4012 struct ieee80211_sub_if_data *sdata = 4013 from_timer(sdata, t, u.mgd.conn_mon_timer); 4014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4015 struct ieee80211_local *local = sdata->local; 4016 4017 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4018 return; 4019 4020 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4021 } 4022 4023 static void ieee80211_sta_monitor_work(struct work_struct *work) 4024 { 4025 struct ieee80211_sub_if_data *sdata = 4026 container_of(work, struct ieee80211_sub_if_data, 4027 u.mgd.monitor_work); 4028 4029 ieee80211_mgd_probe_ap(sdata, false); 4030 } 4031 4032 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4033 { 4034 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4035 __ieee80211_stop_poll(sdata); 4036 4037 /* let's probe the connection once */ 4038 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4039 ieee80211_queue_work(&sdata->local->hw, 4040 &sdata->u.mgd.monitor_work); 4041 } 4042 } 4043 4044 #ifdef CONFIG_PM 4045 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4046 { 4047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4048 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4049 4050 sdata_lock(sdata); 4051 4052 if (ifmgd->auth_data || ifmgd->assoc_data) { 4053 const u8 *bssid = ifmgd->auth_data ? 4054 ifmgd->auth_data->bss->bssid : 4055 ifmgd->assoc_data->bss->bssid; 4056 4057 /* 4058 * If we are trying to authenticate / associate while suspending, 4059 * cfg80211 won't know and won't actually abort those attempts, 4060 * thus we need to do that ourselves. 4061 */ 4062 ieee80211_send_deauth_disassoc(sdata, bssid, 4063 IEEE80211_STYPE_DEAUTH, 4064 WLAN_REASON_DEAUTH_LEAVING, 4065 false, frame_buf); 4066 if (ifmgd->assoc_data) 4067 ieee80211_destroy_assoc_data(sdata, false, true); 4068 if (ifmgd->auth_data) 4069 ieee80211_destroy_auth_data(sdata, false); 4070 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4071 IEEE80211_DEAUTH_FRAME_LEN); 4072 } 4073 4074 /* This is a bit of a hack - we should find a better and more generic 4075 * solution to this. Normally when suspending, cfg80211 will in fact 4076 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4077 * auth (not so important) or assoc (this is the problem) process. 4078 * 4079 * As a consequence, it can happen that we are in the process of both 4080 * associating and suspending, and receive an association response 4081 * after cfg80211 has checked if it needs to disconnect, but before 4082 * we actually set the flag to drop incoming frames. This will then 4083 * cause the workqueue flush to process the association response in 4084 * the suspend, resulting in a successful association just before it 4085 * tries to remove the interface from the driver, which now though 4086 * has a channel context assigned ... this results in issues. 4087 * 4088 * To work around this (for now) simply deauth here again if we're 4089 * now connected. 4090 */ 4091 if (ifmgd->associated && !sdata->local->wowlan) { 4092 u8 bssid[ETH_ALEN]; 4093 struct cfg80211_deauth_request req = { 4094 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4095 .bssid = bssid, 4096 }; 4097 4098 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4099 ieee80211_mgd_deauth(sdata, &req); 4100 } 4101 4102 sdata_unlock(sdata); 4103 } 4104 4105 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4106 { 4107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4108 4109 sdata_lock(sdata); 4110 if (!ifmgd->associated) { 4111 sdata_unlock(sdata); 4112 return; 4113 } 4114 4115 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4116 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4117 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4118 ieee80211_sta_connection_lost(sdata, 4119 ifmgd->associated->bssid, 4120 WLAN_REASON_UNSPECIFIED, 4121 true); 4122 sdata_unlock(sdata); 4123 return; 4124 } 4125 sdata_unlock(sdata); 4126 } 4127 #endif 4128 4129 /* interface setup */ 4130 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4131 { 4132 struct ieee80211_if_managed *ifmgd; 4133 4134 ifmgd = &sdata->u.mgd; 4135 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4136 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4137 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4138 ieee80211_beacon_connection_loss_work); 4139 INIT_WORK(&ifmgd->csa_connection_drop_work, 4140 ieee80211_csa_connection_drop_work); 4141 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4142 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4143 ieee80211_tdls_peer_del_work); 4144 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4145 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4146 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4147 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4148 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4149 ieee80211_sta_handle_tspec_ac_params_wk); 4150 4151 ifmgd->flags = 0; 4152 ifmgd->powersave = sdata->wdev.ps; 4153 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4154 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4155 ifmgd->p2p_noa_index = -1; 4156 4157 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4158 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4159 else 4160 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4161 4162 /* Setup TDLS data */ 4163 spin_lock_init(&ifmgd->teardown_lock); 4164 ifmgd->teardown_skb = NULL; 4165 ifmgd->orig_teardown_skb = NULL; 4166 } 4167 4168 /* scan finished notification */ 4169 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4170 { 4171 struct ieee80211_sub_if_data *sdata; 4172 4173 /* Restart STA timers */ 4174 rcu_read_lock(); 4175 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4176 if (ieee80211_sdata_running(sdata)) 4177 ieee80211_restart_sta_timer(sdata); 4178 } 4179 rcu_read_unlock(); 4180 } 4181 4182 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4183 struct cfg80211_bss *cbss) 4184 { 4185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4186 const u8 *ht_cap_ie, *vht_cap_ie; 4187 const struct ieee80211_ht_cap *ht_cap; 4188 const struct ieee80211_vht_cap *vht_cap; 4189 u8 chains = 1; 4190 4191 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4192 return chains; 4193 4194 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4195 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4196 ht_cap = (void *)(ht_cap_ie + 2); 4197 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4198 /* 4199 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4200 * "Tx Unequal Modulation Supported" fields. 4201 */ 4202 } 4203 4204 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4205 return chains; 4206 4207 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4208 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4209 u8 nss; 4210 u16 tx_mcs_map; 4211 4212 vht_cap = (void *)(vht_cap_ie + 2); 4213 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4214 for (nss = 8; nss > 0; nss--) { 4215 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4216 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4217 break; 4218 } 4219 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4220 chains = max(chains, nss); 4221 } 4222 4223 return chains; 4224 } 4225 4226 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4227 struct cfg80211_bss *cbss) 4228 { 4229 struct ieee80211_local *local = sdata->local; 4230 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4231 const struct ieee80211_ht_cap *ht_cap = NULL; 4232 const struct ieee80211_ht_operation *ht_oper = NULL; 4233 const struct ieee80211_vht_operation *vht_oper = NULL; 4234 struct ieee80211_supported_band *sband; 4235 struct cfg80211_chan_def chandef; 4236 int ret; 4237 u32 i; 4238 bool have_80mhz; 4239 4240 sband = local->hw.wiphy->bands[cbss->channel->band]; 4241 4242 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4243 IEEE80211_STA_DISABLE_80P80MHZ | 4244 IEEE80211_STA_DISABLE_160MHZ); 4245 4246 rcu_read_lock(); 4247 4248 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4249 sband->ht_cap.ht_supported) { 4250 const u8 *ht_oper_ie, *ht_cap_ie; 4251 4252 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4253 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4254 ht_oper = (void *)(ht_oper_ie + 2); 4255 4256 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4257 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4258 ht_cap = (void *)(ht_cap_ie + 2); 4259 4260 if (!ht_cap) { 4261 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4262 ht_oper = NULL; 4263 } 4264 } 4265 4266 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4267 sband->vht_cap.vht_supported) { 4268 const u8 *vht_oper_ie, *vht_cap; 4269 4270 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4271 WLAN_EID_VHT_OPERATION); 4272 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4273 vht_oper = (void *)(vht_oper_ie + 2); 4274 if (vht_oper && !ht_oper) { 4275 vht_oper = NULL; 4276 sdata_info(sdata, 4277 "AP advertised VHT without HT, disabling both\n"); 4278 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4279 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4280 } 4281 4282 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4283 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4284 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4285 vht_oper = NULL; 4286 } 4287 } 4288 4289 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4290 have_80mhz = false; 4291 for (i = 0; i < sband->n_channels; i++) { 4292 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4293 IEEE80211_CHAN_NO_80MHZ)) 4294 continue; 4295 4296 have_80mhz = true; 4297 break; 4298 } 4299 4300 if (!have_80mhz) 4301 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4302 4303 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4304 cbss->channel, 4305 ht_oper, vht_oper, 4306 &chandef, false); 4307 4308 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4309 local->rx_chains); 4310 4311 rcu_read_unlock(); 4312 4313 /* will change later if needed */ 4314 sdata->smps_mode = IEEE80211_SMPS_OFF; 4315 4316 mutex_lock(&local->mtx); 4317 /* 4318 * If this fails (possibly due to channel context sharing 4319 * on incompatible channels, e.g. 80+80 and 160 sharing the 4320 * same control channel) try to use a smaller bandwidth. 4321 */ 4322 ret = ieee80211_vif_use_channel(sdata, &chandef, 4323 IEEE80211_CHANCTX_SHARED); 4324 4325 /* don't downgrade for 5 and 10 MHz channels, though. */ 4326 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4327 chandef.width == NL80211_CHAN_WIDTH_10) 4328 goto out; 4329 4330 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4331 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4332 ret = ieee80211_vif_use_channel(sdata, &chandef, 4333 IEEE80211_CHANCTX_SHARED); 4334 } 4335 out: 4336 mutex_unlock(&local->mtx); 4337 return ret; 4338 } 4339 4340 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4341 struct cfg80211_bss *cbss, bool assoc, 4342 bool override) 4343 { 4344 struct ieee80211_local *local = sdata->local; 4345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4346 struct ieee80211_bss *bss = (void *)cbss->priv; 4347 struct sta_info *new_sta = NULL; 4348 struct ieee80211_supported_band *sband; 4349 bool have_sta = false; 4350 int err; 4351 4352 sband = local->hw.wiphy->bands[cbss->channel->band]; 4353 4354 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4355 return -EINVAL; 4356 4357 /* If a reconfig is happening, bail out */ 4358 if (local->in_reconfig) 4359 return -EBUSY; 4360 4361 if (assoc) { 4362 rcu_read_lock(); 4363 have_sta = sta_info_get(sdata, cbss->bssid); 4364 rcu_read_unlock(); 4365 } 4366 4367 if (!have_sta) { 4368 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4369 if (!new_sta) 4370 return -ENOMEM; 4371 } 4372 4373 /* 4374 * Set up the information for the new channel before setting the 4375 * new channel. We can't - completely race-free - change the basic 4376 * rates bitmap and the channel (sband) that it refers to, but if 4377 * we set it up before we at least avoid calling into the driver's 4378 * bss_info_changed() method with invalid information (since we do 4379 * call that from changing the channel - only for IDLE and perhaps 4380 * some others, but ...). 4381 * 4382 * So to avoid that, just set up all the new information before the 4383 * channel, but tell the driver to apply it only afterwards, since 4384 * it might need the new channel for that. 4385 */ 4386 if (new_sta) { 4387 u32 rates = 0, basic_rates = 0; 4388 bool have_higher_than_11mbit; 4389 int min_rate = INT_MAX, min_rate_index = -1; 4390 const struct cfg80211_bss_ies *ies; 4391 int shift = ieee80211_vif_get_shift(&sdata->vif); 4392 4393 ieee80211_get_rates(sband, bss->supp_rates, 4394 bss->supp_rates_len, 4395 &rates, &basic_rates, 4396 &have_higher_than_11mbit, 4397 &min_rate, &min_rate_index, 4398 shift); 4399 4400 /* 4401 * This used to be a workaround for basic rates missing 4402 * in the association response frame. Now that we no 4403 * longer use the basic rates from there, it probably 4404 * doesn't happen any more, but keep the workaround so 4405 * in case some *other* APs are buggy in different ways 4406 * we can connect -- with a warning. 4407 */ 4408 if (!basic_rates && min_rate_index >= 0) { 4409 sdata_info(sdata, 4410 "No basic rates, using min rate instead\n"); 4411 basic_rates = BIT(min_rate_index); 4412 } 4413 4414 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4415 sdata->vif.bss_conf.basic_rates = basic_rates; 4416 4417 /* cf. IEEE 802.11 9.2.12 */ 4418 if (cbss->channel->band == NL80211_BAND_2GHZ && 4419 have_higher_than_11mbit) 4420 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4421 else 4422 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4423 4424 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4425 4426 /* set timing information */ 4427 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4428 rcu_read_lock(); 4429 ies = rcu_dereference(cbss->beacon_ies); 4430 if (ies) { 4431 const u8 *tim_ie; 4432 4433 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4434 sdata->vif.bss_conf.sync_device_ts = 4435 bss->device_ts_beacon; 4436 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4437 ies->data, ies->len); 4438 if (tim_ie && tim_ie[1] >= 2) 4439 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4440 else 4441 sdata->vif.bss_conf.sync_dtim_count = 0; 4442 } else if (!ieee80211_hw_check(&sdata->local->hw, 4443 TIMING_BEACON_ONLY)) { 4444 ies = rcu_dereference(cbss->proberesp_ies); 4445 /* must be non-NULL since beacon IEs were NULL */ 4446 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4447 sdata->vif.bss_conf.sync_device_ts = 4448 bss->device_ts_presp; 4449 sdata->vif.bss_conf.sync_dtim_count = 0; 4450 } else { 4451 sdata->vif.bss_conf.sync_tsf = 0; 4452 sdata->vif.bss_conf.sync_device_ts = 0; 4453 sdata->vif.bss_conf.sync_dtim_count = 0; 4454 } 4455 rcu_read_unlock(); 4456 } 4457 4458 if (new_sta || override) { 4459 err = ieee80211_prep_channel(sdata, cbss); 4460 if (err) { 4461 if (new_sta) 4462 sta_info_free(local, new_sta); 4463 return -EINVAL; 4464 } 4465 } 4466 4467 if (new_sta) { 4468 /* 4469 * tell driver about BSSID, basic rates and timing 4470 * this was set up above, before setting the channel 4471 */ 4472 ieee80211_bss_info_change_notify(sdata, 4473 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4474 BSS_CHANGED_BEACON_INT); 4475 4476 if (assoc) 4477 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4478 4479 err = sta_info_insert(new_sta); 4480 new_sta = NULL; 4481 if (err) { 4482 sdata_info(sdata, 4483 "failed to insert STA entry for the AP (error %d)\n", 4484 err); 4485 return err; 4486 } 4487 } else 4488 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4489 4490 /* Cancel scan to ensure that nothing interferes with connection */ 4491 if (local->scanning) 4492 ieee80211_scan_cancel(local); 4493 4494 return 0; 4495 } 4496 4497 /* config hooks */ 4498 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4499 struct cfg80211_auth_request *req) 4500 { 4501 struct ieee80211_local *local = sdata->local; 4502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4503 struct ieee80211_mgd_auth_data *auth_data; 4504 u16 auth_alg; 4505 int err; 4506 4507 /* prepare auth data structure */ 4508 4509 switch (req->auth_type) { 4510 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4511 auth_alg = WLAN_AUTH_OPEN; 4512 break; 4513 case NL80211_AUTHTYPE_SHARED_KEY: 4514 if (IS_ERR(local->wep_tx_tfm)) 4515 return -EOPNOTSUPP; 4516 auth_alg = WLAN_AUTH_SHARED_KEY; 4517 break; 4518 case NL80211_AUTHTYPE_FT: 4519 auth_alg = WLAN_AUTH_FT; 4520 break; 4521 case NL80211_AUTHTYPE_NETWORK_EAP: 4522 auth_alg = WLAN_AUTH_LEAP; 4523 break; 4524 case NL80211_AUTHTYPE_SAE: 4525 auth_alg = WLAN_AUTH_SAE; 4526 break; 4527 case NL80211_AUTHTYPE_FILS_SK: 4528 auth_alg = WLAN_AUTH_FILS_SK; 4529 break; 4530 case NL80211_AUTHTYPE_FILS_SK_PFS: 4531 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4532 break; 4533 case NL80211_AUTHTYPE_FILS_PK: 4534 auth_alg = WLAN_AUTH_FILS_PK; 4535 break; 4536 default: 4537 return -EOPNOTSUPP; 4538 } 4539 4540 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4541 req->ie_len, GFP_KERNEL); 4542 if (!auth_data) 4543 return -ENOMEM; 4544 4545 auth_data->bss = req->bss; 4546 4547 if (req->auth_data_len >= 4) { 4548 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4549 __le16 *pos = (__le16 *) req->auth_data; 4550 4551 auth_data->sae_trans = le16_to_cpu(pos[0]); 4552 auth_data->sae_status = le16_to_cpu(pos[1]); 4553 } 4554 memcpy(auth_data->data, req->auth_data + 4, 4555 req->auth_data_len - 4); 4556 auth_data->data_len += req->auth_data_len - 4; 4557 } 4558 4559 if (req->ie && req->ie_len) { 4560 memcpy(&auth_data->data[auth_data->data_len], 4561 req->ie, req->ie_len); 4562 auth_data->data_len += req->ie_len; 4563 } 4564 4565 if (req->key && req->key_len) { 4566 auth_data->key_len = req->key_len; 4567 auth_data->key_idx = req->key_idx; 4568 memcpy(auth_data->key, req->key, req->key_len); 4569 } 4570 4571 auth_data->algorithm = auth_alg; 4572 4573 /* try to authenticate/probe */ 4574 4575 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4576 ifmgd->assoc_data) { 4577 err = -EBUSY; 4578 goto err_free; 4579 } 4580 4581 if (ifmgd->auth_data) 4582 ieee80211_destroy_auth_data(sdata, false); 4583 4584 /* prep auth_data so we don't go into idle on disassoc */ 4585 ifmgd->auth_data = auth_data; 4586 4587 if (ifmgd->associated) { 4588 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4589 4590 sdata_info(sdata, 4591 "disconnect from AP %pM for new auth to %pM\n", 4592 ifmgd->associated->bssid, req->bss->bssid); 4593 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4594 WLAN_REASON_UNSPECIFIED, 4595 false, frame_buf); 4596 4597 ieee80211_report_disconnect(sdata, frame_buf, 4598 sizeof(frame_buf), true, 4599 WLAN_REASON_UNSPECIFIED); 4600 } 4601 4602 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4603 4604 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4605 if (err) 4606 goto err_clear; 4607 4608 err = ieee80211_auth(sdata); 4609 if (err) { 4610 sta_info_destroy_addr(sdata, req->bss->bssid); 4611 goto err_clear; 4612 } 4613 4614 /* hold our own reference */ 4615 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4616 return 0; 4617 4618 err_clear: 4619 eth_zero_addr(ifmgd->bssid); 4620 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4621 ifmgd->auth_data = NULL; 4622 mutex_lock(&sdata->local->mtx); 4623 ieee80211_vif_release_channel(sdata); 4624 mutex_unlock(&sdata->local->mtx); 4625 err_free: 4626 kfree(auth_data); 4627 return err; 4628 } 4629 4630 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4631 struct cfg80211_assoc_request *req) 4632 { 4633 struct ieee80211_local *local = sdata->local; 4634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4635 struct ieee80211_bss *bss = (void *)req->bss->priv; 4636 struct ieee80211_mgd_assoc_data *assoc_data; 4637 const struct cfg80211_bss_ies *beacon_ies; 4638 struct ieee80211_supported_band *sband; 4639 const u8 *ssidie, *ht_ie, *vht_ie; 4640 int i, err; 4641 bool override = false; 4642 4643 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4644 if (!assoc_data) 4645 return -ENOMEM; 4646 4647 rcu_read_lock(); 4648 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4649 if (!ssidie) { 4650 rcu_read_unlock(); 4651 kfree(assoc_data); 4652 return -EINVAL; 4653 } 4654 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4655 assoc_data->ssid_len = ssidie[1]; 4656 rcu_read_unlock(); 4657 4658 if (ifmgd->associated) { 4659 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4660 4661 sdata_info(sdata, 4662 "disconnect from AP %pM for new assoc to %pM\n", 4663 ifmgd->associated->bssid, req->bss->bssid); 4664 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4665 WLAN_REASON_UNSPECIFIED, 4666 false, frame_buf); 4667 4668 ieee80211_report_disconnect(sdata, frame_buf, 4669 sizeof(frame_buf), true, 4670 WLAN_REASON_UNSPECIFIED); 4671 } 4672 4673 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4674 err = -EBUSY; 4675 goto err_free; 4676 } 4677 4678 if (ifmgd->assoc_data) { 4679 err = -EBUSY; 4680 goto err_free; 4681 } 4682 4683 if (ifmgd->auth_data) { 4684 bool match; 4685 4686 /* keep sta info, bssid if matching */ 4687 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4688 ieee80211_destroy_auth_data(sdata, match); 4689 } 4690 4691 /* prepare assoc data */ 4692 4693 ifmgd->beacon_crc_valid = false; 4694 4695 assoc_data->wmm = bss->wmm_used && 4696 (local->hw.queues >= IEEE80211_NUM_ACS); 4697 4698 /* 4699 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4700 * We still associate in non-HT mode (11a/b/g) if any one of these 4701 * ciphers is configured as pairwise. 4702 * We can set this to true for non-11n hardware, that'll be checked 4703 * separately along with the peer capabilities. 4704 */ 4705 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4706 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4707 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4708 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4709 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4710 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4711 netdev_info(sdata->dev, 4712 "disabling HT/VHT due to WEP/TKIP use\n"); 4713 } 4714 } 4715 4716 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4717 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4718 if (!sband->ht_cap.ht_supported || 4719 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4720 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4721 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4722 if (!bss->wmm_used && 4723 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4724 netdev_info(sdata->dev, 4725 "disabling HT as WMM/QoS is not supported by the AP\n"); 4726 } 4727 4728 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4729 if (!sband->vht_cap.vht_supported || 4730 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4731 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4732 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4733 if (!bss->wmm_used && 4734 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4735 netdev_info(sdata->dev, 4736 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4737 } 4738 4739 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4740 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4741 sizeof(ifmgd->ht_capa_mask)); 4742 4743 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4744 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4745 sizeof(ifmgd->vht_capa_mask)); 4746 4747 if (req->ie && req->ie_len) { 4748 memcpy(assoc_data->ie, req->ie, req->ie_len); 4749 assoc_data->ie_len = req->ie_len; 4750 } 4751 4752 if (req->fils_kek) { 4753 /* should already be checked in cfg80211 - so warn */ 4754 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4755 err = -EINVAL; 4756 goto err_free; 4757 } 4758 memcpy(assoc_data->fils_kek, req->fils_kek, 4759 req->fils_kek_len); 4760 assoc_data->fils_kek_len = req->fils_kek_len; 4761 } 4762 4763 if (req->fils_nonces) 4764 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4765 2 * FILS_NONCE_LEN); 4766 4767 assoc_data->bss = req->bss; 4768 4769 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4770 if (ifmgd->powersave) 4771 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4772 else 4773 sdata->smps_mode = IEEE80211_SMPS_OFF; 4774 } else 4775 sdata->smps_mode = ifmgd->req_smps; 4776 4777 assoc_data->capability = req->bss->capability; 4778 assoc_data->supp_rates = bss->supp_rates; 4779 assoc_data->supp_rates_len = bss->supp_rates_len; 4780 4781 rcu_read_lock(); 4782 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4783 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4784 assoc_data->ap_ht_param = 4785 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4786 else 4787 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4788 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4789 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4790 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4791 sizeof(struct ieee80211_vht_cap)); 4792 else 4793 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4794 rcu_read_unlock(); 4795 4796 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4797 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4798 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4799 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4800 4801 if (bss->wmm_used && bss->uapsd_supported && 4802 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4803 assoc_data->uapsd = true; 4804 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4805 } else { 4806 assoc_data->uapsd = false; 4807 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4808 } 4809 4810 if (req->prev_bssid) 4811 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4812 4813 if (req->use_mfp) { 4814 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4815 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4816 } else { 4817 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4818 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4819 } 4820 4821 if (req->flags & ASSOC_REQ_USE_RRM) 4822 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4823 else 4824 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4825 4826 if (req->crypto.control_port) 4827 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4828 else 4829 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4830 4831 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4832 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4833 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4834 sdata->vif.type); 4835 4836 /* kick off associate process */ 4837 4838 ifmgd->assoc_data = assoc_data; 4839 ifmgd->dtim_period = 0; 4840 ifmgd->have_beacon = false; 4841 4842 /* override HT/VHT configuration only if the AP and we support it */ 4843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4844 struct ieee80211_sta_ht_cap sta_ht_cap; 4845 4846 if (req->flags & ASSOC_REQ_DISABLE_HT) 4847 override = true; 4848 4849 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4850 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4851 4852 /* check for 40 MHz disable override */ 4853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4854 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4855 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4856 override = true; 4857 4858 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4859 req->flags & ASSOC_REQ_DISABLE_VHT) 4860 override = true; 4861 } 4862 4863 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4864 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4865 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4866 } 4867 4868 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4869 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4870 4871 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4872 if (err) 4873 goto err_clear; 4874 4875 rcu_read_lock(); 4876 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4877 4878 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4879 !beacon_ies) { 4880 /* 4881 * Wait up to one beacon interval ... 4882 * should this be more if we miss one? 4883 */ 4884 sdata_info(sdata, "waiting for beacon from %pM\n", 4885 ifmgd->bssid); 4886 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4887 assoc_data->timeout_started = true; 4888 assoc_data->need_beacon = true; 4889 } else if (beacon_ies) { 4890 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4891 beacon_ies->data, 4892 beacon_ies->len); 4893 u8 dtim_count = 0; 4894 4895 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4896 const struct ieee80211_tim_ie *tim; 4897 tim = (void *)(tim_ie + 2); 4898 ifmgd->dtim_period = tim->dtim_period; 4899 dtim_count = tim->dtim_count; 4900 } 4901 ifmgd->have_beacon = true; 4902 assoc_data->timeout = jiffies; 4903 assoc_data->timeout_started = true; 4904 4905 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4906 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4907 sdata->vif.bss_conf.sync_device_ts = 4908 bss->device_ts_beacon; 4909 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4910 } 4911 } else { 4912 assoc_data->timeout = jiffies; 4913 assoc_data->timeout_started = true; 4914 } 4915 rcu_read_unlock(); 4916 4917 run_again(sdata, assoc_data->timeout); 4918 4919 if (bss->corrupt_data) { 4920 char *corrupt_type = "data"; 4921 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4922 if (bss->corrupt_data & 4923 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4924 corrupt_type = "beacon and probe response"; 4925 else 4926 corrupt_type = "beacon"; 4927 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4928 corrupt_type = "probe response"; 4929 sdata_info(sdata, "associating with AP with corrupt %s\n", 4930 corrupt_type); 4931 } 4932 4933 return 0; 4934 err_clear: 4935 eth_zero_addr(ifmgd->bssid); 4936 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4937 ifmgd->assoc_data = NULL; 4938 err_free: 4939 kfree(assoc_data); 4940 return err; 4941 } 4942 4943 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4944 struct cfg80211_deauth_request *req) 4945 { 4946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4947 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4948 bool tx = !req->local_state_change; 4949 4950 if (ifmgd->auth_data && 4951 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4952 sdata_info(sdata, 4953 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4954 req->bssid, req->reason_code, 4955 ieee80211_get_reason_code_string(req->reason_code)); 4956 4957 drv_mgd_prepare_tx(sdata->local, sdata); 4958 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4959 IEEE80211_STYPE_DEAUTH, 4960 req->reason_code, tx, 4961 frame_buf); 4962 ieee80211_destroy_auth_data(sdata, false); 4963 ieee80211_report_disconnect(sdata, frame_buf, 4964 sizeof(frame_buf), true, 4965 req->reason_code); 4966 4967 return 0; 4968 } 4969 4970 if (ifmgd->assoc_data && 4971 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4972 sdata_info(sdata, 4973 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4974 req->bssid, req->reason_code, 4975 ieee80211_get_reason_code_string(req->reason_code)); 4976 4977 drv_mgd_prepare_tx(sdata->local, sdata); 4978 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4979 IEEE80211_STYPE_DEAUTH, 4980 req->reason_code, tx, 4981 frame_buf); 4982 ieee80211_destroy_assoc_data(sdata, false, true); 4983 ieee80211_report_disconnect(sdata, frame_buf, 4984 sizeof(frame_buf), true, 4985 req->reason_code); 4986 return 0; 4987 } 4988 4989 if (ifmgd->associated && 4990 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4991 sdata_info(sdata, 4992 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4993 req->bssid, req->reason_code, 4994 ieee80211_get_reason_code_string(req->reason_code)); 4995 4996 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4997 req->reason_code, tx, frame_buf); 4998 ieee80211_report_disconnect(sdata, frame_buf, 4999 sizeof(frame_buf), true, 5000 req->reason_code); 5001 return 0; 5002 } 5003 5004 return -ENOTCONN; 5005 } 5006 5007 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5008 struct cfg80211_disassoc_request *req) 5009 { 5010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5011 u8 bssid[ETH_ALEN]; 5012 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5013 5014 /* 5015 * cfg80211 should catch this ... but it's racy since 5016 * we can receive a disassoc frame, process it, hand it 5017 * to cfg80211 while that's in a locked section already 5018 * trying to tell us that the user wants to disconnect. 5019 */ 5020 if (ifmgd->associated != req->bss) 5021 return -ENOLINK; 5022 5023 sdata_info(sdata, 5024 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5025 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5026 5027 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5028 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5029 req->reason_code, !req->local_state_change, 5030 frame_buf); 5031 5032 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5033 req->reason_code); 5034 5035 return 0; 5036 } 5037 5038 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5039 { 5040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5041 5042 /* 5043 * Make sure some work items will not run after this, 5044 * they will not do anything but might not have been 5045 * cancelled when disconnecting. 5046 */ 5047 cancel_work_sync(&ifmgd->monitor_work); 5048 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5049 cancel_work_sync(&ifmgd->request_smps_work); 5050 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5051 cancel_work_sync(&ifmgd->chswitch_work); 5052 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5053 5054 sdata_lock(sdata); 5055 if (ifmgd->assoc_data) { 5056 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5057 ieee80211_destroy_assoc_data(sdata, false, false); 5058 cfg80211_assoc_timeout(sdata->dev, bss); 5059 } 5060 if (ifmgd->auth_data) 5061 ieee80211_destroy_auth_data(sdata, false); 5062 spin_lock_bh(&ifmgd->teardown_lock); 5063 if (ifmgd->teardown_skb) { 5064 kfree_skb(ifmgd->teardown_skb); 5065 ifmgd->teardown_skb = NULL; 5066 ifmgd->orig_teardown_skb = NULL; 5067 } 5068 spin_unlock_bh(&ifmgd->teardown_lock); 5069 del_timer_sync(&ifmgd->timer); 5070 sdata_unlock(sdata); 5071 } 5072 5073 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5074 enum nl80211_cqm_rssi_threshold_event rssi_event, 5075 s32 rssi_level, 5076 gfp_t gfp) 5077 { 5078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5079 5080 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5081 5082 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5083 } 5084 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5085 5086 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5087 { 5088 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5089 5090 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5091 5092 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5093 } 5094 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5095