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 - 2016 Intel Deutschland GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/delay.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/etherdevice.h> 21 #include <linux/moduleparam.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 #include "fils_aead.h" 34 35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_cap *ht_cap, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->center_freq2 = 0; 165 166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 if (!(ht_cap->cap_info & 174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 175 ret = IEEE80211_STA_DISABLE_40MHZ; 176 vht_chandef = *chandef; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 ieee80211_chandef_ht_oper(ht_oper, chandef); 202 } else { 203 /* 40 MHz (and 80 MHz) must be supported for VHT */ 204 ret = IEEE80211_STA_DISABLE_VHT; 205 /* also mark 40 MHz disabled */ 206 ret |= IEEE80211_STA_DISABLE_40MHZ; 207 goto out; 208 } 209 210 if (!vht_oper || !sband->vht_cap.vht_supported) { 211 ret = IEEE80211_STA_DISABLE_VHT; 212 goto out; 213 } 214 215 vht_chandef = *chandef; 216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 218 sdata_info(sdata, 219 "AP VHT information is invalid, disable VHT\n"); 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 if (!cfg80211_chandef_valid(&vht_chandef)) { 225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 226 sdata_info(sdata, 227 "AP VHT information is invalid, disable VHT\n"); 228 ret = IEEE80211_STA_DISABLE_VHT; 229 goto out; 230 } 231 232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 233 ret = 0; 234 goto out; 235 } 236 237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 239 sdata_info(sdata, 240 "AP VHT information doesn't match HT, disable VHT\n"); 241 ret = IEEE80211_STA_DISABLE_VHT; 242 goto out; 243 } 244 245 *chandef = vht_chandef; 246 247 ret = 0; 248 249 out: 250 /* 251 * When tracking the current AP, don't do any further checks if the 252 * new chandef is identical to the one we're currently using for the 253 * connection. This keeps us from playing ping-pong with regulatory, 254 * without it the following can happen (for example): 255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 256 * - AP advertises regdom US 257 * - CRDA loads regdom US with 80 MHz prohibited (old database) 258 * - the code below detects an unsupported channel, downgrades, and 259 * we disconnect from the AP in the caller 260 * - disconnect causes CRDA to reload world regdomain and the game 261 * starts anew. 262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 263 * 264 * It seems possible that there are still scenarios with CSA or real 265 * bandwidth changes where a this could happen, but those cases are 266 * less common and wouldn't completely prevent using the AP. 267 */ 268 if (tracking && 269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 270 return ret; 271 272 /* don't print the message below for VHT mismatch if VHT is disabled */ 273 if (ret & IEEE80211_STA_DISABLE_VHT) 274 vht_chandef = *chandef; 275 276 /* 277 * Ignore the DISABLED flag when we're already connected and only 278 * tracking the APs beacon for bandwidth changes - otherwise we 279 * might get disconnected here if we connect to an AP, update our 280 * regulatory information based on the AP's country IE and the 281 * information we have is wrong/outdated and disables the channel 282 * that we're actually using for the connection to the AP. 283 */ 284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 285 tracking ? 0 : 286 IEEE80211_CHAN_DISABLED)) { 287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 288 ret = IEEE80211_STA_DISABLE_HT | 289 IEEE80211_STA_DISABLE_VHT; 290 break; 291 } 292 293 ret |= ieee80211_chandef_downgrade(chandef); 294 } 295 296 if (chandef->width != vht_chandef.width && !tracking) 297 sdata_info(sdata, 298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 299 300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 301 return ret; 302 } 303 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 305 struct sta_info *sta, 306 const struct ieee80211_ht_cap *ht_cap, 307 const struct ieee80211_ht_operation *ht_oper, 308 const struct ieee80211_vht_operation *vht_oper, 309 const u8 *bssid, u32 *changed) 310 { 311 struct ieee80211_local *local = sdata->local; 312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 313 struct ieee80211_supported_band *sband; 314 struct ieee80211_channel *chan; 315 struct cfg80211_chan_def chandef; 316 u16 ht_opmode; 317 u32 flags; 318 enum ieee80211_sta_rx_bandwidth new_sta_bw; 319 int ret; 320 321 /* if HT was/is disabled, don't track any bandwidth changes */ 322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 323 return 0; 324 325 /* don't check VHT if we associated as non-VHT station */ 326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 327 vht_oper = NULL; 328 329 if (WARN_ON_ONCE(!sta)) 330 return -EINVAL; 331 332 /* 333 * if bss configuration changed store the new one - 334 * this may be applicable even if channel is identical 335 */ 336 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 338 *changed |= BSS_CHANGED_HT; 339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 340 } 341 342 chan = sdata->vif.bss_conf.chandef.chan; 343 sband = local->hw.wiphy->bands[chan->band]; 344 345 /* calculate new channel (type) based on HT/VHT operation IEs */ 346 flags = ieee80211_determine_chantype(sdata, sband, chan, 347 ht_cap, ht_oper, vht_oper, 348 &chandef, true); 349 350 /* 351 * Downgrade the new channel if we associated with restricted 352 * capabilities. For example, if we associated as a 20 MHz STA 353 * to a 40 MHz AP (due to regulatory, capabilities or config 354 * reasons) then switching to a 40 MHz channel now won't do us 355 * any good -- we couldn't use it with the AP. 356 */ 357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 358 chandef.width == NL80211_CHAN_WIDTH_80P80) 359 flags |= ieee80211_chandef_downgrade(&chandef); 360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 361 chandef.width == NL80211_CHAN_WIDTH_160) 362 flags |= ieee80211_chandef_downgrade(&chandef); 363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 364 chandef.width > NL80211_CHAN_WIDTH_20) 365 flags |= ieee80211_chandef_downgrade(&chandef); 366 367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 368 return 0; 369 370 sdata_info(sdata, 371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 372 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 373 chandef.center_freq1, chandef.center_freq2); 374 375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 376 IEEE80211_STA_DISABLE_VHT | 377 IEEE80211_STA_DISABLE_40MHZ | 378 IEEE80211_STA_DISABLE_80P80MHZ | 379 IEEE80211_STA_DISABLE_160MHZ)) || 380 !cfg80211_chandef_valid(&chandef)) { 381 sdata_info(sdata, 382 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 383 ifmgd->bssid); 384 return -EINVAL; 385 } 386 387 switch (chandef.width) { 388 case NL80211_CHAN_WIDTH_20_NOHT: 389 case NL80211_CHAN_WIDTH_20: 390 new_sta_bw = IEEE80211_STA_RX_BW_20; 391 break; 392 case NL80211_CHAN_WIDTH_40: 393 new_sta_bw = IEEE80211_STA_RX_BW_40; 394 break; 395 case NL80211_CHAN_WIDTH_80: 396 new_sta_bw = IEEE80211_STA_RX_BW_80; 397 break; 398 case NL80211_CHAN_WIDTH_80P80: 399 case NL80211_CHAN_WIDTH_160: 400 new_sta_bw = IEEE80211_STA_RX_BW_160; 401 break; 402 default: 403 return -EINVAL; 404 } 405 406 if (new_sta_bw > sta->cur_max_bandwidth) 407 new_sta_bw = sta->cur_max_bandwidth; 408 409 if (new_sta_bw < sta->sta.bandwidth) { 410 sta->sta.bandwidth = new_sta_bw; 411 rate_control_rate_update(local, sband, sta, 412 IEEE80211_RC_BW_CHANGED); 413 } 414 415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 416 if (ret) { 417 sdata_info(sdata, 418 "AP %pM changed bandwidth to incompatible one - disconnect\n", 419 ifmgd->bssid); 420 return ret; 421 } 422 423 if (new_sta_bw > sta->sta.bandwidth) { 424 sta->sta.bandwidth = new_sta_bw; 425 rate_control_rate_update(local, sband, sta, 426 IEEE80211_RC_BW_CHANGED); 427 } 428 429 return 0; 430 } 431 432 /* frame sending functions */ 433 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 435 struct sk_buff *skb, u8 ap_ht_param, 436 struct ieee80211_supported_band *sband, 437 struct ieee80211_channel *channel, 438 enum ieee80211_smps_mode smps) 439 { 440 u8 *pos; 441 u32 flags = channel->flags; 442 u16 cap; 443 struct ieee80211_sta_ht_cap ht_cap; 444 445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 446 447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 448 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 449 450 /* determine capability flags */ 451 cap = ht_cap.cap; 452 453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 457 cap &= ~IEEE80211_HT_CAP_SGI_40; 458 } 459 break; 460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 463 cap &= ~IEEE80211_HT_CAP_SGI_40; 464 } 465 break; 466 } 467 468 /* 469 * If 40 MHz was disabled associate as though we weren't 470 * capable of 40 MHz -- some broken APs will never fall 471 * back to trying to transmit in 20 MHz. 472 */ 473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 475 cap &= ~IEEE80211_HT_CAP_SGI_40; 476 } 477 478 /* set SM PS mode properly */ 479 cap &= ~IEEE80211_HT_CAP_SM_PS; 480 switch (smps) { 481 case IEEE80211_SMPS_AUTOMATIC: 482 case IEEE80211_SMPS_NUM_MODES: 483 WARN_ON(1); 484 case IEEE80211_SMPS_OFF: 485 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 486 IEEE80211_HT_CAP_SM_PS_SHIFT; 487 break; 488 case IEEE80211_SMPS_STATIC: 489 cap |= WLAN_HT_CAP_SM_PS_STATIC << 490 IEEE80211_HT_CAP_SM_PS_SHIFT; 491 break; 492 case IEEE80211_SMPS_DYNAMIC: 493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 494 IEEE80211_HT_CAP_SM_PS_SHIFT; 495 break; 496 } 497 498 /* reserve and fill IE */ 499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 501 } 502 503 /* This function determines vht capability flags for the association 504 * and builds the IE. 505 * Note - the function may set the owner of the MU-MIMO capability 506 */ 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 508 struct sk_buff *skb, 509 struct ieee80211_supported_band *sband, 510 struct ieee80211_vht_cap *ap_vht_cap) 511 { 512 struct ieee80211_local *local = sdata->local; 513 u8 *pos; 514 u32 cap; 515 struct ieee80211_sta_vht_cap vht_cap; 516 u32 mask, ap_bf_sts, our_bf_sts; 517 518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 519 520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 522 523 /* determine capability flags */ 524 cap = vht_cap.cap; 525 526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 528 529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 533 } 534 535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 538 } 539 540 /* 541 * Some APs apparently get confused if our capabilities are better 542 * than theirs, so restrict what we advertise in the assoc request. 543 */ 544 if (!(ap_vht_cap->vht_cap_info & 545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 548 else if (!(ap_vht_cap->vht_cap_info & 549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 551 552 /* 553 * If some other vif is using the MU-MIMO capablity we cannot associate 554 * using MU-MIMO - this will lead to contradictions in the group-id 555 * mechanism. 556 * Ownership is defined since association request, in order to avoid 557 * simultaneous associations with MU-MIMO. 558 */ 559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 560 bool disable_mu_mimo = false; 561 struct ieee80211_sub_if_data *other; 562 563 list_for_each_entry_rcu(other, &local->interfaces, list) { 564 if (other->vif.mu_mimo_owner) { 565 disable_mu_mimo = true; 566 break; 567 } 568 } 569 if (disable_mu_mimo) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 else 572 sdata->vif.mu_mimo_owner = true; 573 } 574 575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 576 577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 578 our_bf_sts = cap & mask; 579 580 if (ap_bf_sts < our_bf_sts) { 581 cap &= ~mask; 582 cap |= ap_bf_sts; 583 } 584 585 /* reserve and fill IE */ 586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 588 } 589 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 591 { 592 struct ieee80211_local *local = sdata->local; 593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 595 struct sk_buff *skb; 596 struct ieee80211_mgmt *mgmt; 597 u8 *pos, qos_info; 598 size_t offset = 0, noffset; 599 int i, count, rates_len, supp_rates_len, shift; 600 u16 capab; 601 struct ieee80211_supported_band *sband; 602 struct ieee80211_chanctx_conf *chanctx_conf; 603 struct ieee80211_channel *chan; 604 u32 rate_flags, rates = 0; 605 606 sdata_assert_lock(sdata); 607 608 rcu_read_lock(); 609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 610 if (WARN_ON(!chanctx_conf)) { 611 rcu_read_unlock(); 612 return; 613 } 614 chan = chanctx_conf->def.chan; 615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 616 rcu_read_unlock(); 617 sband = local->hw.wiphy->bands[chan->band]; 618 shift = ieee80211_vif_get_shift(&sdata->vif); 619 620 if (assoc_data->supp_rates_len) { 621 /* 622 * Get all rates supported by the device and the AP as 623 * some APs don't like getting a superset of their rates 624 * in the association request (e.g. D-Link DAP 1353 in 625 * b-only mode)... 626 */ 627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 628 assoc_data->supp_rates, 629 assoc_data->supp_rates_len, 630 &rates); 631 } else { 632 /* 633 * In case AP not provide any supported rates information 634 * before association, we send information element(s) with 635 * all rates that we support. 636 */ 637 rates_len = 0; 638 for (i = 0; i < sband->n_bitrates; i++) { 639 if ((rate_flags & sband->bitrates[i].flags) 640 != rate_flags) 641 continue; 642 rates |= BIT(i); 643 rates_len++; 644 } 645 } 646 647 skb = alloc_skb(local->hw.extra_tx_headroom + 648 sizeof(*mgmt) + /* bit too much but doesn't matter */ 649 2 + assoc_data->ssid_len + /* SSID */ 650 4 + rates_len + /* (extended) rates */ 651 4 + /* power capability */ 652 2 + 2 * sband->n_channels + /* supported channels */ 653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 655 assoc_data->ie_len + /* extra IEs */ 656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 657 9, /* WMM */ 658 GFP_KERNEL); 659 if (!skb) 660 return; 661 662 skb_reserve(skb, local->hw.extra_tx_headroom); 663 664 capab = WLAN_CAPABILITY_ESS; 665 666 if (sband->band == NL80211_BAND_2GHZ) { 667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 669 } 670 671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 672 capab |= WLAN_CAPABILITY_PRIVACY; 673 674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 677 678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 679 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 680 681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 682 memset(mgmt, 0, 24); 683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 686 687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 688 skb_put(skb, 10); 689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 690 IEEE80211_STYPE_REASSOC_REQ); 691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 692 mgmt->u.reassoc_req.listen_interval = 693 cpu_to_le16(local->hw.conf.listen_interval); 694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 695 ETH_ALEN); 696 } else { 697 skb_put(skb, 4); 698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 699 IEEE80211_STYPE_ASSOC_REQ); 700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 701 mgmt->u.assoc_req.listen_interval = 702 cpu_to_le16(local->hw.conf.listen_interval); 703 } 704 705 /* SSID */ 706 pos = skb_put(skb, 2 + assoc_data->ssid_len); 707 *pos++ = WLAN_EID_SSID; 708 *pos++ = assoc_data->ssid_len; 709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 710 711 /* add all rates which were marked to be used above */ 712 supp_rates_len = rates_len; 713 if (supp_rates_len > 8) 714 supp_rates_len = 8; 715 716 pos = skb_put(skb, supp_rates_len + 2); 717 *pos++ = WLAN_EID_SUPP_RATES; 718 *pos++ = supp_rates_len; 719 720 count = 0; 721 for (i = 0; i < sband->n_bitrates; i++) { 722 if (BIT(i) & rates) { 723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 724 5 * (1 << shift)); 725 *pos++ = (u8) rate; 726 if (++count == 8) 727 break; 728 } 729 } 730 731 if (rates_len > count) { 732 pos = skb_put(skb, rates_len - count + 2); 733 *pos++ = WLAN_EID_EXT_SUPP_RATES; 734 *pos++ = rates_len - count; 735 736 for (i++; i < sband->n_bitrates; i++) { 737 if (BIT(i) & rates) { 738 int rate; 739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 740 5 * (1 << shift)); 741 *pos++ = (u8) rate; 742 } 743 } 744 } 745 746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 747 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 748 pos = skb_put(skb, 4); 749 *pos++ = WLAN_EID_PWR_CAPABILITY; 750 *pos++ = 2; 751 *pos++ = 0; /* min tx power */ 752 /* max tx power */ 753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 754 } 755 756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 757 /* TODO: get this in reg domain format */ 758 pos = skb_put(skb, 2 * sband->n_channels + 2); 759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 760 *pos++ = 2 * sband->n_channels; 761 for (i = 0; i < sband->n_channels; i++) { 762 *pos++ = ieee80211_frequency_to_channel( 763 sband->channels[i].center_freq); 764 *pos++ = 1; /* one channel in the subband*/ 765 } 766 } 767 768 /* if present, add any custom IEs that go before HT */ 769 if (assoc_data->ie_len) { 770 static const u8 before_ht[] = { 771 WLAN_EID_SSID, 772 WLAN_EID_SUPP_RATES, 773 WLAN_EID_EXT_SUPP_RATES, 774 WLAN_EID_PWR_CAPABILITY, 775 WLAN_EID_SUPPORTED_CHANNELS, 776 WLAN_EID_RSN, 777 WLAN_EID_QOS_CAPA, 778 WLAN_EID_RRM_ENABLED_CAPABILITIES, 779 WLAN_EID_MOBILITY_DOMAIN, 780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 781 WLAN_EID_RIC_DATA, /* reassoc only */ 782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 783 }; 784 static const u8 after_ric[] = { 785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 786 WLAN_EID_HT_CAPABILITY, 787 WLAN_EID_BSS_COEX_2040, 788 WLAN_EID_EXT_CAPABILITY, 789 WLAN_EID_QOS_TRAFFIC_CAPA, 790 WLAN_EID_TIM_BCAST_REQ, 791 WLAN_EID_INTERWORKING, 792 /* 60GHz doesn't happen right now */ 793 WLAN_EID_VHT_CAPABILITY, 794 WLAN_EID_OPMODE_NOTIF, 795 }; 796 797 noffset = ieee80211_ie_split_ric(assoc_data->ie, 798 assoc_data->ie_len, 799 before_ht, 800 ARRAY_SIZE(before_ht), 801 after_ric, 802 ARRAY_SIZE(after_ric), 803 offset); 804 pos = skb_put(skb, noffset - offset); 805 memcpy(pos, assoc_data->ie + offset, noffset - offset); 806 offset = noffset; 807 } 808 809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 812 813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 815 sband, chan, sdata->smps_mode); 816 817 /* if present, add any custom IEs that go before VHT */ 818 if (assoc_data->ie_len) { 819 static const u8 before_vht[] = { 820 WLAN_EID_SSID, 821 WLAN_EID_SUPP_RATES, 822 WLAN_EID_EXT_SUPP_RATES, 823 WLAN_EID_PWR_CAPABILITY, 824 WLAN_EID_SUPPORTED_CHANNELS, 825 WLAN_EID_RSN, 826 WLAN_EID_QOS_CAPA, 827 WLAN_EID_RRM_ENABLED_CAPABILITIES, 828 WLAN_EID_MOBILITY_DOMAIN, 829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 830 WLAN_EID_HT_CAPABILITY, 831 WLAN_EID_BSS_COEX_2040, 832 WLAN_EID_EXT_CAPABILITY, 833 WLAN_EID_QOS_TRAFFIC_CAPA, 834 WLAN_EID_TIM_BCAST_REQ, 835 WLAN_EID_INTERWORKING, 836 }; 837 838 /* RIC already taken above, so no need to handle here anymore */ 839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 840 before_vht, ARRAY_SIZE(before_vht), 841 offset); 842 pos = skb_put(skb, noffset - offset); 843 memcpy(pos, assoc_data->ie + offset, noffset - offset); 844 offset = noffset; 845 } 846 847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 848 ieee80211_add_vht_ie(sdata, skb, sband, 849 &assoc_data->ap_vht_cap); 850 851 /* if present, add any custom non-vendor IEs that go after HT */ 852 if (assoc_data->ie_len) { 853 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 854 assoc_data->ie_len, 855 offset); 856 pos = skb_put(skb, noffset - offset); 857 memcpy(pos, assoc_data->ie + offset, noffset - offset); 858 offset = noffset; 859 } 860 861 if (assoc_data->wmm) { 862 if (assoc_data->uapsd) { 863 qos_info = ifmgd->uapsd_queues; 864 qos_info |= (ifmgd->uapsd_max_sp_len << 865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 866 } else { 867 qos_info = 0; 868 } 869 870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 871 } 872 873 /* add any remaining custom (i.e. vendor specific here) IEs */ 874 if (assoc_data->ie_len) { 875 noffset = assoc_data->ie_len; 876 pos = skb_put(skb, noffset - offset); 877 memcpy(pos, assoc_data->ie + offset, noffset - offset); 878 } 879 880 if (assoc_data->fils_kek_len && 881 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 882 dev_kfree_skb(skb); 883 return; 884 } 885 886 drv_mgd_prepare_tx(local, sdata); 887 888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 891 IEEE80211_TX_INTFL_MLME_CONN_TX; 892 ieee80211_tx_skb(sdata, skb); 893 } 894 895 void ieee80211_send_pspoll(struct ieee80211_local *local, 896 struct ieee80211_sub_if_data *sdata) 897 { 898 struct ieee80211_pspoll *pspoll; 899 struct sk_buff *skb; 900 901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 902 if (!skb) 903 return; 904 905 pspoll = (struct ieee80211_pspoll *) skb->data; 906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 907 908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 909 ieee80211_tx_skb(sdata, skb); 910 } 911 912 void ieee80211_send_nullfunc(struct ieee80211_local *local, 913 struct ieee80211_sub_if_data *sdata, 914 bool powersave) 915 { 916 struct sk_buff *skb; 917 struct ieee80211_hdr_3addr *nullfunc; 918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 919 920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 921 if (!skb) 922 return; 923 924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 925 if (powersave) 926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 927 928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 930 931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 933 934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 936 937 ieee80211_tx_skb(sdata, skb); 938 } 939 940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 941 struct ieee80211_sub_if_data *sdata) 942 { 943 struct sk_buff *skb; 944 struct ieee80211_hdr *nullfunc; 945 __le16 fc; 946 947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 948 return; 949 950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 951 if (!skb) 952 return; 953 954 skb_reserve(skb, local->hw.extra_tx_headroom); 955 956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 957 memset(nullfunc, 0, 30); 958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 960 nullfunc->frame_control = fc; 961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 965 966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 967 ieee80211_tx_skb(sdata, skb); 968 } 969 970 /* spectrum management related things */ 971 static void ieee80211_chswitch_work(struct work_struct *work) 972 { 973 struct ieee80211_sub_if_data *sdata = 974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 975 struct ieee80211_local *local = sdata->local; 976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 977 int ret; 978 979 if (!ieee80211_sdata_running(sdata)) 980 return; 981 982 sdata_lock(sdata); 983 mutex_lock(&local->mtx); 984 mutex_lock(&local->chanctx_mtx); 985 986 if (!ifmgd->associated) 987 goto out; 988 989 if (!sdata->vif.csa_active) 990 goto out; 991 992 /* 993 * using reservation isn't immediate as it may be deferred until later 994 * with multi-vif. once reservation is complete it will re-schedule the 995 * work with no reserved_chanctx so verify chandef to check if it 996 * completed successfully 997 */ 998 999 if (sdata->reserved_chanctx) { 1000 /* 1001 * with multi-vif csa driver may call ieee80211_csa_finish() 1002 * many times while waiting for other interfaces to use their 1003 * reservations 1004 */ 1005 if (sdata->reserved_ready) 1006 goto out; 1007 1008 ret = ieee80211_vif_use_reserved_context(sdata); 1009 if (ret) { 1010 sdata_info(sdata, 1011 "failed to use reserved channel context, disconnecting (err=%d)\n", 1012 ret); 1013 ieee80211_queue_work(&sdata->local->hw, 1014 &ifmgd->csa_connection_drop_work); 1015 goto out; 1016 } 1017 1018 goto out; 1019 } 1020 1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1022 &sdata->csa_chandef)) { 1023 sdata_info(sdata, 1024 "failed to finalize channel switch, disconnecting\n"); 1025 ieee80211_queue_work(&sdata->local->hw, 1026 &ifmgd->csa_connection_drop_work); 1027 goto out; 1028 } 1029 1030 /* XXX: shouldn't really modify cfg80211-owned data! */ 1031 ifmgd->associated->channel = sdata->csa_chandef.chan; 1032 1033 ifmgd->csa_waiting_bcn = true; 1034 1035 ieee80211_sta_reset_beacon_monitor(sdata); 1036 ieee80211_sta_reset_conn_monitor(sdata); 1037 1038 out: 1039 mutex_unlock(&local->chanctx_mtx); 1040 mutex_unlock(&local->mtx); 1041 sdata_unlock(sdata); 1042 } 1043 1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1045 { 1046 struct ieee80211_local *local = sdata->local; 1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1048 int ret; 1049 1050 sdata_assert_lock(sdata); 1051 1052 WARN_ON(!sdata->vif.csa_active); 1053 1054 if (sdata->csa_block_tx) { 1055 ieee80211_wake_vif_queues(local, sdata, 1056 IEEE80211_QUEUE_STOP_REASON_CSA); 1057 sdata->csa_block_tx = false; 1058 } 1059 1060 sdata->vif.csa_active = false; 1061 ifmgd->csa_waiting_bcn = false; 1062 1063 ret = drv_post_channel_switch(sdata); 1064 if (ret) { 1065 sdata_info(sdata, 1066 "driver post channel switch failed, disconnecting\n"); 1067 ieee80211_queue_work(&local->hw, 1068 &ifmgd->csa_connection_drop_work); 1069 return; 1070 } 1071 1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1073 } 1074 1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1076 { 1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1079 1080 trace_api_chswitch_done(sdata, success); 1081 if (!success) { 1082 sdata_info(sdata, 1083 "driver channel switch failed, disconnecting\n"); 1084 ieee80211_queue_work(&sdata->local->hw, 1085 &ifmgd->csa_connection_drop_work); 1086 } else { 1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1088 } 1089 } 1090 EXPORT_SYMBOL(ieee80211_chswitch_done); 1091 1092 static void ieee80211_chswitch_timer(unsigned long data) 1093 { 1094 struct ieee80211_sub_if_data *sdata = 1095 (struct ieee80211_sub_if_data *) data; 1096 1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1098 } 1099 1100 static void 1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1102 u64 timestamp, u32 device_timestamp, 1103 struct ieee802_11_elems *elems, 1104 bool beacon) 1105 { 1106 struct ieee80211_local *local = sdata->local; 1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1108 struct cfg80211_bss *cbss = ifmgd->associated; 1109 struct ieee80211_chanctx_conf *conf; 1110 struct ieee80211_chanctx *chanctx; 1111 enum nl80211_band current_band; 1112 struct ieee80211_csa_ie csa_ie; 1113 struct ieee80211_channel_switch ch_switch; 1114 int res; 1115 1116 sdata_assert_lock(sdata); 1117 1118 if (!cbss) 1119 return; 1120 1121 if (local->scanning) 1122 return; 1123 1124 /* disregard subsequent announcements if we are already processing */ 1125 if (sdata->vif.csa_active) 1126 return; 1127 1128 current_band = cbss->channel->band; 1129 memset(&csa_ie, 0, sizeof(csa_ie)); 1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1131 ifmgd->flags, 1132 ifmgd->associated->bssid, &csa_ie); 1133 if (res < 0) 1134 ieee80211_queue_work(&local->hw, 1135 &ifmgd->csa_connection_drop_work); 1136 if (res) 1137 return; 1138 1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1140 IEEE80211_CHAN_DISABLED)) { 1141 sdata_info(sdata, 1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1143 ifmgd->associated->bssid, 1144 csa_ie.chandef.chan->center_freq, 1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1146 csa_ie.chandef.center_freq2); 1147 ieee80211_queue_work(&local->hw, 1148 &ifmgd->csa_connection_drop_work); 1149 return; 1150 } 1151 1152 if (cfg80211_chandef_identical(&csa_ie.chandef, 1153 &sdata->vif.bss_conf.chandef)) { 1154 if (ifmgd->csa_ignored_same_chan) 1155 return; 1156 sdata_info(sdata, 1157 "AP %pM tries to chanswitch to same channel, ignore\n", 1158 ifmgd->associated->bssid); 1159 ifmgd->csa_ignored_same_chan = true; 1160 return; 1161 } 1162 1163 /* 1164 * Drop all TDLS peers - either we disconnect or move to a different 1165 * channel from this point on. There's no telling what our peer will do. 1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1167 * have an incompatible wider chandef. 1168 */ 1169 ieee80211_teardown_tdls_peers(sdata); 1170 1171 mutex_lock(&local->mtx); 1172 mutex_lock(&local->chanctx_mtx); 1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1174 lockdep_is_held(&local->chanctx_mtx)); 1175 if (!conf) { 1176 sdata_info(sdata, 1177 "no channel context assigned to vif?, disconnecting\n"); 1178 goto drop_connection; 1179 } 1180 1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1182 1183 if (local->use_chanctx && 1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1185 sdata_info(sdata, 1186 "driver doesn't support chan-switch with channel contexts\n"); 1187 goto drop_connection; 1188 } 1189 1190 ch_switch.timestamp = timestamp; 1191 ch_switch.device_timestamp = device_timestamp; 1192 ch_switch.block_tx = csa_ie.mode; 1193 ch_switch.chandef = csa_ie.chandef; 1194 ch_switch.count = csa_ie.count; 1195 1196 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1197 sdata_info(sdata, 1198 "preparing for channel switch failed, disconnecting\n"); 1199 goto drop_connection; 1200 } 1201 1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1203 chanctx->mode, false); 1204 if (res) { 1205 sdata_info(sdata, 1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1207 res); 1208 goto drop_connection; 1209 } 1210 mutex_unlock(&local->chanctx_mtx); 1211 1212 sdata->vif.csa_active = true; 1213 sdata->csa_chandef = csa_ie.chandef; 1214 sdata->csa_block_tx = csa_ie.mode; 1215 ifmgd->csa_ignored_same_chan = false; 1216 1217 if (sdata->csa_block_tx) 1218 ieee80211_stop_vif_queues(local, sdata, 1219 IEEE80211_QUEUE_STOP_REASON_CSA); 1220 mutex_unlock(&local->mtx); 1221 1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1223 csa_ie.count); 1224 1225 if (local->ops->channel_switch) { 1226 /* use driver's channel switch callback */ 1227 drv_channel_switch(local, sdata, &ch_switch); 1228 return; 1229 } 1230 1231 /* channel switch handled in software */ 1232 if (csa_ie.count <= 1) 1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1234 else 1235 mod_timer(&ifmgd->chswitch_timer, 1236 TU_TO_EXP_TIME((csa_ie.count - 1) * 1237 cbss->beacon_interval)); 1238 return; 1239 drop_connection: 1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1241 mutex_unlock(&local->chanctx_mtx); 1242 mutex_unlock(&local->mtx); 1243 } 1244 1245 static bool 1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1247 struct ieee80211_channel *channel, 1248 const u8 *country_ie, u8 country_ie_len, 1249 const u8 *pwr_constr_elem, 1250 int *chan_pwr, int *pwr_reduction) 1251 { 1252 struct ieee80211_country_ie_triplet *triplet; 1253 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1254 int i, chan_increment; 1255 bool have_chan_pwr = false; 1256 1257 /* Invalid IE */ 1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1259 return false; 1260 1261 triplet = (void *)(country_ie + 3); 1262 country_ie_len -= 3; 1263 1264 switch (channel->band) { 1265 default: 1266 WARN_ON_ONCE(1); 1267 /* fall through */ 1268 case NL80211_BAND_2GHZ: 1269 case NL80211_BAND_60GHZ: 1270 chan_increment = 1; 1271 break; 1272 case NL80211_BAND_5GHZ: 1273 chan_increment = 4; 1274 break; 1275 } 1276 1277 /* find channel */ 1278 while (country_ie_len >= 3) { 1279 u8 first_channel = triplet->chans.first_channel; 1280 1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1282 goto next; 1283 1284 for (i = 0; i < triplet->chans.num_channels; i++) { 1285 if (first_channel + i * chan_increment == chan) { 1286 have_chan_pwr = true; 1287 *chan_pwr = triplet->chans.max_power; 1288 break; 1289 } 1290 } 1291 if (have_chan_pwr) 1292 break; 1293 1294 next: 1295 triplet++; 1296 country_ie_len -= 3; 1297 } 1298 1299 if (have_chan_pwr && pwr_constr_elem) 1300 *pwr_reduction = *pwr_constr_elem; 1301 else 1302 *pwr_reduction = 0; 1303 1304 return have_chan_pwr; 1305 } 1306 1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1308 struct ieee80211_channel *channel, 1309 const u8 *cisco_dtpc_ie, 1310 int *pwr_level) 1311 { 1312 /* From practical testing, the first data byte of the DTPC element 1313 * seems to contain the requested dBm level, and the CLI on Cisco 1314 * APs clearly state the range is -127 to 127 dBm, which indicates 1315 * a signed byte, although it seemingly never actually goes negative. 1316 * The other byte seems to always be zero. 1317 */ 1318 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1319 } 1320 1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1322 struct ieee80211_channel *channel, 1323 struct ieee80211_mgmt *mgmt, 1324 const u8 *country_ie, u8 country_ie_len, 1325 const u8 *pwr_constr_ie, 1326 const u8 *cisco_dtpc_ie) 1327 { 1328 bool has_80211h_pwr = false, has_cisco_pwr = false; 1329 int chan_pwr = 0, pwr_reduction_80211h = 0; 1330 int pwr_level_cisco, pwr_level_80211h; 1331 int new_ap_level; 1332 __le16 capab = mgmt->u.probe_resp.capab_info; 1333 1334 if (country_ie && 1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1338 sdata, channel, country_ie, country_ie_len, 1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1340 pwr_level_80211h = 1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1342 } 1343 1344 if (cisco_dtpc_ie) { 1345 ieee80211_find_cisco_dtpc( 1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1347 has_cisco_pwr = true; 1348 } 1349 1350 if (!has_80211h_pwr && !has_cisco_pwr) 1351 return 0; 1352 1353 /* If we have both 802.11h and Cisco DTPC, apply both limits 1354 * by picking the smallest of the two power levels advertised. 1355 */ 1356 if (has_80211h_pwr && 1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1358 new_ap_level = pwr_level_80211h; 1359 1360 if (sdata->ap_power_level == new_ap_level) 1361 return 0; 1362 1363 sdata_dbg(sdata, 1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1366 sdata->u.mgd.bssid); 1367 } else { /* has_cisco_pwr is always true here. */ 1368 new_ap_level = pwr_level_cisco; 1369 1370 if (sdata->ap_power_level == new_ap_level) 1371 return 0; 1372 1373 sdata_dbg(sdata, 1374 "Limiting TX power to %d dBm as advertised by %pM\n", 1375 pwr_level_cisco, sdata->u.mgd.bssid); 1376 } 1377 1378 sdata->ap_power_level = new_ap_level; 1379 if (__ieee80211_recalc_txpower(sdata)) 1380 return BSS_CHANGED_TXPOWER; 1381 return 0; 1382 } 1383 1384 /* powersave */ 1385 static void ieee80211_enable_ps(struct ieee80211_local *local, 1386 struct ieee80211_sub_if_data *sdata) 1387 { 1388 struct ieee80211_conf *conf = &local->hw.conf; 1389 1390 /* 1391 * If we are scanning right now then the parameters will 1392 * take effect when scan finishes. 1393 */ 1394 if (local->scanning) 1395 return; 1396 1397 if (conf->dynamic_ps_timeout > 0 && 1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1399 mod_timer(&local->dynamic_ps_timer, jiffies + 1400 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1401 } else { 1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1403 ieee80211_send_nullfunc(local, sdata, true); 1404 1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1407 return; 1408 1409 conf->flags |= IEEE80211_CONF_PS; 1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1411 } 1412 } 1413 1414 static void ieee80211_change_ps(struct ieee80211_local *local) 1415 { 1416 struct ieee80211_conf *conf = &local->hw.conf; 1417 1418 if (local->ps_sdata) { 1419 ieee80211_enable_ps(local, local->ps_sdata); 1420 } else if (conf->flags & IEEE80211_CONF_PS) { 1421 conf->flags &= ~IEEE80211_CONF_PS; 1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1423 del_timer_sync(&local->dynamic_ps_timer); 1424 cancel_work_sync(&local->dynamic_ps_enable_work); 1425 } 1426 } 1427 1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1429 { 1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1431 struct sta_info *sta = NULL; 1432 bool authorized = false; 1433 1434 if (!mgd->powersave) 1435 return false; 1436 1437 if (mgd->broken_ap) 1438 return false; 1439 1440 if (!mgd->associated) 1441 return false; 1442 1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1444 return false; 1445 1446 if (!mgd->have_beacon) 1447 return false; 1448 1449 rcu_read_lock(); 1450 sta = sta_info_get(sdata, mgd->bssid); 1451 if (sta) 1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1453 rcu_read_unlock(); 1454 1455 return authorized; 1456 } 1457 1458 /* need to hold RTNL or interface lock */ 1459 void ieee80211_recalc_ps(struct ieee80211_local *local) 1460 { 1461 struct ieee80211_sub_if_data *sdata, *found = NULL; 1462 int count = 0; 1463 int timeout; 1464 1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1466 local->ps_sdata = NULL; 1467 return; 1468 } 1469 1470 list_for_each_entry(sdata, &local->interfaces, list) { 1471 if (!ieee80211_sdata_running(sdata)) 1472 continue; 1473 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1474 /* If an AP vif is found, then disable PS 1475 * by setting the count to zero thereby setting 1476 * ps_sdata to NULL. 1477 */ 1478 count = 0; 1479 break; 1480 } 1481 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1482 continue; 1483 found = sdata; 1484 count++; 1485 } 1486 1487 if (count == 1 && ieee80211_powersave_allowed(found)) { 1488 u8 dtimper = found->u.mgd.dtim_period; 1489 1490 timeout = local->dynamic_ps_forced_timeout; 1491 if (timeout < 0) 1492 timeout = 100; 1493 local->hw.conf.dynamic_ps_timeout = timeout; 1494 1495 /* If the TIM IE is invalid, pretend the value is 1 */ 1496 if (!dtimper) 1497 dtimper = 1; 1498 1499 local->hw.conf.ps_dtim_period = dtimper; 1500 local->ps_sdata = found; 1501 } else { 1502 local->ps_sdata = NULL; 1503 } 1504 1505 ieee80211_change_ps(local); 1506 } 1507 1508 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1509 { 1510 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1511 1512 if (sdata->vif.bss_conf.ps != ps_allowed) { 1513 sdata->vif.bss_conf.ps = ps_allowed; 1514 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1515 } 1516 } 1517 1518 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1519 { 1520 struct ieee80211_local *local = 1521 container_of(work, struct ieee80211_local, 1522 dynamic_ps_disable_work); 1523 1524 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1525 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1526 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1527 } 1528 1529 ieee80211_wake_queues_by_reason(&local->hw, 1530 IEEE80211_MAX_QUEUE_MAP, 1531 IEEE80211_QUEUE_STOP_REASON_PS, 1532 false); 1533 } 1534 1535 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1536 { 1537 struct ieee80211_local *local = 1538 container_of(work, struct ieee80211_local, 1539 dynamic_ps_enable_work); 1540 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1541 struct ieee80211_if_managed *ifmgd; 1542 unsigned long flags; 1543 int q; 1544 1545 /* can only happen when PS was just disabled anyway */ 1546 if (!sdata) 1547 return; 1548 1549 ifmgd = &sdata->u.mgd; 1550 1551 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1552 return; 1553 1554 if (local->hw.conf.dynamic_ps_timeout > 0) { 1555 /* don't enter PS if TX frames are pending */ 1556 if (drv_tx_frames_pending(local)) { 1557 mod_timer(&local->dynamic_ps_timer, jiffies + 1558 msecs_to_jiffies( 1559 local->hw.conf.dynamic_ps_timeout)); 1560 return; 1561 } 1562 1563 /* 1564 * transmission can be stopped by others which leads to 1565 * dynamic_ps_timer expiry. Postpone the ps timer if it 1566 * is not the actual idle state. 1567 */ 1568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1569 for (q = 0; q < local->hw.queues; q++) { 1570 if (local->queue_stop_reasons[q]) { 1571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1572 flags); 1573 mod_timer(&local->dynamic_ps_timer, jiffies + 1574 msecs_to_jiffies( 1575 local->hw.conf.dynamic_ps_timeout)); 1576 return; 1577 } 1578 } 1579 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1580 } 1581 1582 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1583 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1584 if (drv_tx_frames_pending(local)) { 1585 mod_timer(&local->dynamic_ps_timer, jiffies + 1586 msecs_to_jiffies( 1587 local->hw.conf.dynamic_ps_timeout)); 1588 } else { 1589 ieee80211_send_nullfunc(local, sdata, true); 1590 /* Flush to get the tx status of nullfunc frame */ 1591 ieee80211_flush_queues(local, sdata, false); 1592 } 1593 } 1594 1595 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1596 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1597 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1598 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1599 local->hw.conf.flags |= IEEE80211_CONF_PS; 1600 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1601 } 1602 } 1603 1604 void ieee80211_dynamic_ps_timer(unsigned long data) 1605 { 1606 struct ieee80211_local *local = (void *) data; 1607 1608 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1609 } 1610 1611 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1612 { 1613 struct delayed_work *delayed_work = to_delayed_work(work); 1614 struct ieee80211_sub_if_data *sdata = 1615 container_of(delayed_work, struct ieee80211_sub_if_data, 1616 dfs_cac_timer_work); 1617 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1618 1619 mutex_lock(&sdata->local->mtx); 1620 if (sdata->wdev.cac_started) { 1621 ieee80211_vif_release_channel(sdata); 1622 cfg80211_cac_event(sdata->dev, &chandef, 1623 NL80211_RADAR_CAC_FINISHED, 1624 GFP_KERNEL); 1625 } 1626 mutex_unlock(&sdata->local->mtx); 1627 } 1628 1629 static bool 1630 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1631 { 1632 struct ieee80211_local *local = sdata->local; 1633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1634 bool ret = false; 1635 int ac; 1636 1637 if (local->hw.queues < IEEE80211_NUM_ACS) 1638 return false; 1639 1640 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1641 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1642 int non_acm_ac; 1643 unsigned long now = jiffies; 1644 1645 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1646 tx_tspec->admitted_time && 1647 time_after(now, tx_tspec->time_slice_start + HZ)) { 1648 tx_tspec->consumed_tx_time = 0; 1649 tx_tspec->time_slice_start = now; 1650 1651 if (tx_tspec->downgraded) 1652 tx_tspec->action = 1653 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1654 } 1655 1656 switch (tx_tspec->action) { 1657 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1658 /* take the original parameters */ 1659 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1660 sdata_err(sdata, 1661 "failed to set TX queue parameters for queue %d\n", 1662 ac); 1663 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1664 tx_tspec->downgraded = false; 1665 ret = true; 1666 break; 1667 case TX_TSPEC_ACTION_DOWNGRADE: 1668 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1669 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1670 ret = true; 1671 break; 1672 } 1673 /* downgrade next lower non-ACM AC */ 1674 for (non_acm_ac = ac + 1; 1675 non_acm_ac < IEEE80211_NUM_ACS; 1676 non_acm_ac++) 1677 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1678 break; 1679 /* Usually the loop will result in using BK even if it 1680 * requires admission control, but such a configuration 1681 * makes no sense and we have to transmit somehow - the 1682 * AC selection does the same thing. 1683 * If we started out trying to downgrade from BK, then 1684 * the extra condition here might be needed. 1685 */ 1686 if (non_acm_ac >= IEEE80211_NUM_ACS) 1687 non_acm_ac = IEEE80211_AC_BK; 1688 if (drv_conf_tx(local, sdata, ac, 1689 &sdata->tx_conf[non_acm_ac])) 1690 sdata_err(sdata, 1691 "failed to set TX queue parameters for queue %d\n", 1692 ac); 1693 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1694 ret = true; 1695 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1696 tx_tspec->time_slice_start + HZ - now + 1); 1697 break; 1698 case TX_TSPEC_ACTION_NONE: 1699 /* nothing now */ 1700 break; 1701 } 1702 } 1703 1704 return ret; 1705 } 1706 1707 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1708 { 1709 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1710 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1711 } 1712 1713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1714 { 1715 struct ieee80211_sub_if_data *sdata; 1716 1717 sdata = container_of(work, struct ieee80211_sub_if_data, 1718 u.mgd.tx_tspec_wk.work); 1719 ieee80211_sta_handle_tspec_ac_params(sdata); 1720 } 1721 1722 /* MLME */ 1723 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1724 struct ieee80211_sub_if_data *sdata, 1725 const u8 *wmm_param, size_t wmm_param_len) 1726 { 1727 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1729 size_t left; 1730 int count, ac; 1731 const u8 *pos; 1732 u8 uapsd_queues = 0; 1733 1734 if (!local->ops->conf_tx) 1735 return false; 1736 1737 if (local->hw.queues < IEEE80211_NUM_ACS) 1738 return false; 1739 1740 if (!wmm_param) 1741 return false; 1742 1743 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1744 return false; 1745 1746 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1747 uapsd_queues = ifmgd->uapsd_queues; 1748 1749 count = wmm_param[6] & 0x0f; 1750 if (count == ifmgd->wmm_last_param_set) 1751 return false; 1752 ifmgd->wmm_last_param_set = count; 1753 1754 pos = wmm_param + 8; 1755 left = wmm_param_len - 8; 1756 1757 memset(¶ms, 0, sizeof(params)); 1758 1759 sdata->wmm_acm = 0; 1760 for (; left >= 4; left -= 4, pos += 4) { 1761 int aci = (pos[0] >> 5) & 0x03; 1762 int acm = (pos[0] >> 4) & 0x01; 1763 bool uapsd = false; 1764 1765 switch (aci) { 1766 case 1: /* AC_BK */ 1767 ac = IEEE80211_AC_BK; 1768 if (acm) 1769 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1771 uapsd = true; 1772 break; 1773 case 2: /* AC_VI */ 1774 ac = IEEE80211_AC_VI; 1775 if (acm) 1776 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1777 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1778 uapsd = true; 1779 break; 1780 case 3: /* AC_VO */ 1781 ac = IEEE80211_AC_VO; 1782 if (acm) 1783 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1784 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1785 uapsd = true; 1786 break; 1787 case 0: /* AC_BE */ 1788 default: 1789 ac = IEEE80211_AC_BE; 1790 if (acm) 1791 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1792 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1793 uapsd = true; 1794 break; 1795 } 1796 1797 params[ac].aifs = pos[0] & 0x0f; 1798 1799 if (params[ac].aifs < 2) { 1800 sdata_info(sdata, 1801 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1802 params[ac].aifs, aci); 1803 params[ac].aifs = 2; 1804 } 1805 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1806 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1807 params[ac].txop = get_unaligned_le16(pos + 2); 1808 params[ac].acm = acm; 1809 params[ac].uapsd = uapsd; 1810 1811 if (params[ac].cw_min > params[ac].cw_max) { 1812 sdata_info(sdata, 1813 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1814 params[ac].cw_min, params[ac].cw_max, aci); 1815 return false; 1816 } 1817 } 1818 1819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1820 mlme_dbg(sdata, 1821 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1822 ac, params[ac].acm, 1823 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1824 params[ac].txop, params[ac].uapsd, 1825 ifmgd->tx_tspec[ac].downgraded); 1826 sdata->tx_conf[ac] = params[ac]; 1827 if (!ifmgd->tx_tspec[ac].downgraded && 1828 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1829 sdata_err(sdata, 1830 "failed to set TX queue parameters for AC %d\n", 1831 ac); 1832 } 1833 1834 /* enable WMM or activate new settings */ 1835 sdata->vif.bss_conf.qos = true; 1836 return true; 1837 } 1838 1839 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1840 { 1841 lockdep_assert_held(&sdata->local->mtx); 1842 1843 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1844 ieee80211_run_deferred_scan(sdata->local); 1845 } 1846 1847 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1848 { 1849 mutex_lock(&sdata->local->mtx); 1850 __ieee80211_stop_poll(sdata); 1851 mutex_unlock(&sdata->local->mtx); 1852 } 1853 1854 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1855 u16 capab, bool erp_valid, u8 erp) 1856 { 1857 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1858 u32 changed = 0; 1859 bool use_protection; 1860 bool use_short_preamble; 1861 bool use_short_slot; 1862 1863 if (erp_valid) { 1864 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1865 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1866 } else { 1867 use_protection = false; 1868 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1869 } 1870 1871 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1872 if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ) 1873 use_short_slot = true; 1874 1875 if (use_protection != bss_conf->use_cts_prot) { 1876 bss_conf->use_cts_prot = use_protection; 1877 changed |= BSS_CHANGED_ERP_CTS_PROT; 1878 } 1879 1880 if (use_short_preamble != bss_conf->use_short_preamble) { 1881 bss_conf->use_short_preamble = use_short_preamble; 1882 changed |= BSS_CHANGED_ERP_PREAMBLE; 1883 } 1884 1885 if (use_short_slot != bss_conf->use_short_slot) { 1886 bss_conf->use_short_slot = use_short_slot; 1887 changed |= BSS_CHANGED_ERP_SLOT; 1888 } 1889 1890 return changed; 1891 } 1892 1893 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1894 struct cfg80211_bss *cbss, 1895 u32 bss_info_changed) 1896 { 1897 struct ieee80211_bss *bss = (void *)cbss->priv; 1898 struct ieee80211_local *local = sdata->local; 1899 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1900 1901 bss_info_changed |= BSS_CHANGED_ASSOC; 1902 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1903 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1904 1905 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1906 beacon_loss_count * bss_conf->beacon_int)); 1907 1908 sdata->u.mgd.associated = cbss; 1909 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1910 1911 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1912 1913 if (sdata->vif.p2p || 1914 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1915 const struct cfg80211_bss_ies *ies; 1916 1917 rcu_read_lock(); 1918 ies = rcu_dereference(cbss->ies); 1919 if (ies) { 1920 int ret; 1921 1922 ret = cfg80211_get_p2p_attr( 1923 ies->data, ies->len, 1924 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1925 (u8 *) &bss_conf->p2p_noa_attr, 1926 sizeof(bss_conf->p2p_noa_attr)); 1927 if (ret >= 2) { 1928 sdata->u.mgd.p2p_noa_index = 1929 bss_conf->p2p_noa_attr.index; 1930 bss_info_changed |= BSS_CHANGED_P2P_PS; 1931 } 1932 } 1933 rcu_read_unlock(); 1934 } 1935 1936 /* just to be sure */ 1937 ieee80211_stop_poll(sdata); 1938 1939 ieee80211_led_assoc(local, 1); 1940 1941 if (sdata->u.mgd.have_beacon) { 1942 /* 1943 * If the AP is buggy we may get here with no DTIM period 1944 * known, so assume it's 1 which is the only safe assumption 1945 * in that case, although if the TIM IE is broken powersave 1946 * probably just won't work at all. 1947 */ 1948 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1949 bss_conf->beacon_rate = bss->beacon_rate; 1950 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1951 } else { 1952 bss_conf->beacon_rate = NULL; 1953 bss_conf->dtim_period = 0; 1954 } 1955 1956 bss_conf->assoc = 1; 1957 1958 /* Tell the driver to monitor connection quality (if supported) */ 1959 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1960 bss_conf->cqm_rssi_thold) 1961 bss_info_changed |= BSS_CHANGED_CQM; 1962 1963 /* Enable ARP filtering */ 1964 if (bss_conf->arp_addr_cnt) 1965 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1966 1967 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1968 1969 mutex_lock(&local->iflist_mtx); 1970 ieee80211_recalc_ps(local); 1971 mutex_unlock(&local->iflist_mtx); 1972 1973 ieee80211_recalc_smps(sdata); 1974 ieee80211_recalc_ps_vif(sdata); 1975 1976 netif_carrier_on(sdata->dev); 1977 } 1978 1979 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1980 u16 stype, u16 reason, bool tx, 1981 u8 *frame_buf) 1982 { 1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1984 struct ieee80211_local *local = sdata->local; 1985 u32 changed = 0; 1986 1987 sdata_assert_lock(sdata); 1988 1989 if (WARN_ON_ONCE(tx && !frame_buf)) 1990 return; 1991 1992 if (WARN_ON(!ifmgd->associated)) 1993 return; 1994 1995 ieee80211_stop_poll(sdata); 1996 1997 ifmgd->associated = NULL; 1998 netif_carrier_off(sdata->dev); 1999 2000 /* 2001 * if we want to get out of ps before disassoc (why?) we have 2002 * to do it before sending disassoc, as otherwise the null-packet 2003 * won't be valid. 2004 */ 2005 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2006 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2007 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2008 } 2009 local->ps_sdata = NULL; 2010 2011 /* disable per-vif ps */ 2012 ieee80211_recalc_ps_vif(sdata); 2013 2014 /* make sure ongoing transmission finishes */ 2015 synchronize_net(); 2016 2017 /* 2018 * drop any frame before deauth/disassoc, this can be data or 2019 * management frame. Since we are disconnecting, we should not 2020 * insist sending these frames which can take time and delay 2021 * the disconnection and possible the roaming. 2022 */ 2023 if (tx) 2024 ieee80211_flush_queues(local, sdata, true); 2025 2026 /* deauthenticate/disassociate now */ 2027 if (tx || frame_buf) 2028 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2029 reason, tx, frame_buf); 2030 2031 /* flush out frame - make sure the deauth was actually sent */ 2032 if (tx) 2033 ieee80211_flush_queues(local, sdata, false); 2034 2035 /* clear bssid only after building the needed mgmt frames */ 2036 eth_zero_addr(ifmgd->bssid); 2037 2038 /* remove AP and TDLS peers */ 2039 sta_info_flush(sdata); 2040 2041 /* finally reset all BSS / config parameters */ 2042 changed |= ieee80211_reset_erp_info(sdata); 2043 2044 ieee80211_led_assoc(local, 0); 2045 changed |= BSS_CHANGED_ASSOC; 2046 sdata->vif.bss_conf.assoc = false; 2047 2048 ifmgd->p2p_noa_index = -1; 2049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2050 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2051 2052 /* on the next assoc, re-program HT/VHT parameters */ 2053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2057 2058 /* reset MU-MIMO ownership and group data */ 2059 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2060 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2061 memset(sdata->vif.bss_conf.mu_group.position, 0, 2062 sizeof(sdata->vif.bss_conf.mu_group.position)); 2063 changed |= BSS_CHANGED_MU_GROUPS; 2064 sdata->vif.mu_mimo_owner = false; 2065 2066 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2067 2068 del_timer_sync(&local->dynamic_ps_timer); 2069 cancel_work_sync(&local->dynamic_ps_enable_work); 2070 2071 /* Disable ARP filtering */ 2072 if (sdata->vif.bss_conf.arp_addr_cnt) 2073 changed |= BSS_CHANGED_ARP_FILTER; 2074 2075 sdata->vif.bss_conf.qos = false; 2076 changed |= BSS_CHANGED_QOS; 2077 2078 /* The BSSID (not really interesting) and HT changed */ 2079 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2080 ieee80211_bss_info_change_notify(sdata, changed); 2081 2082 /* disassociated - set to defaults now */ 2083 ieee80211_set_wmm_default(sdata, false, false); 2084 2085 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2086 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2087 del_timer_sync(&sdata->u.mgd.timer); 2088 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2089 2090 sdata->vif.bss_conf.dtim_period = 0; 2091 sdata->vif.bss_conf.beacon_rate = NULL; 2092 2093 ifmgd->have_beacon = false; 2094 2095 ifmgd->flags = 0; 2096 mutex_lock(&local->mtx); 2097 ieee80211_vif_release_channel(sdata); 2098 2099 sdata->vif.csa_active = false; 2100 ifmgd->csa_waiting_bcn = false; 2101 ifmgd->csa_ignored_same_chan = false; 2102 if (sdata->csa_block_tx) { 2103 ieee80211_wake_vif_queues(local, sdata, 2104 IEEE80211_QUEUE_STOP_REASON_CSA); 2105 sdata->csa_block_tx = false; 2106 } 2107 mutex_unlock(&local->mtx); 2108 2109 /* existing TX TSPEC sessions no longer exist */ 2110 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2111 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2112 2113 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2114 } 2115 2116 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2117 struct ieee80211_hdr *hdr) 2118 { 2119 /* 2120 * We can postpone the mgd.timer whenever receiving unicast frames 2121 * from AP because we know that the connection is working both ways 2122 * at that time. But multicast frames (and hence also beacons) must 2123 * be ignored here, because we need to trigger the timer during 2124 * data idle periods for sending the periodic probe request to the 2125 * AP we're connected to. 2126 */ 2127 if (is_multicast_ether_addr(hdr->addr1)) 2128 return; 2129 2130 ieee80211_sta_reset_conn_monitor(sdata); 2131 } 2132 2133 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2134 { 2135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2136 struct ieee80211_local *local = sdata->local; 2137 2138 mutex_lock(&local->mtx); 2139 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2140 goto out; 2141 2142 __ieee80211_stop_poll(sdata); 2143 2144 mutex_lock(&local->iflist_mtx); 2145 ieee80211_recalc_ps(local); 2146 mutex_unlock(&local->iflist_mtx); 2147 2148 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2149 goto out; 2150 2151 /* 2152 * We've received a probe response, but are not sure whether 2153 * we have or will be receiving any beacons or data, so let's 2154 * schedule the timers again, just in case. 2155 */ 2156 ieee80211_sta_reset_beacon_monitor(sdata); 2157 2158 mod_timer(&ifmgd->conn_mon_timer, 2159 round_jiffies_up(jiffies + 2160 IEEE80211_CONNECTION_IDLE_TIME)); 2161 out: 2162 mutex_unlock(&local->mtx); 2163 } 2164 2165 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2166 struct ieee80211_hdr *hdr, 2167 u16 tx_time) 2168 { 2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2170 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2171 int ac = ieee80211_ac_from_tid(tid); 2172 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2173 unsigned long now = jiffies; 2174 2175 if (likely(!tx_tspec->admitted_time)) 2176 return; 2177 2178 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2179 tx_tspec->consumed_tx_time = 0; 2180 tx_tspec->time_slice_start = now; 2181 2182 if (tx_tspec->downgraded) { 2183 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2184 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2185 } 2186 } 2187 2188 if (tx_tspec->downgraded) 2189 return; 2190 2191 tx_tspec->consumed_tx_time += tx_time; 2192 2193 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2194 tx_tspec->downgraded = true; 2195 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2196 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2197 } 2198 } 2199 2200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2201 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2202 { 2203 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2204 2205 if (!ieee80211_is_data(hdr->frame_control)) 2206 return; 2207 2208 if (ieee80211_is_nullfunc(hdr->frame_control) && 2209 sdata->u.mgd.probe_send_count > 0) { 2210 if (ack) 2211 ieee80211_sta_reset_conn_monitor(sdata); 2212 else 2213 sdata->u.mgd.nullfunc_failed = true; 2214 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2215 return; 2216 } 2217 2218 if (ack) 2219 ieee80211_sta_reset_conn_monitor(sdata); 2220 } 2221 2222 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2223 { 2224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2225 const u8 *ssid; 2226 u8 *dst = ifmgd->associated->bssid; 2227 u8 unicast_limit = max(1, max_probe_tries - 3); 2228 struct sta_info *sta; 2229 2230 /* 2231 * Try sending broadcast probe requests for the last three 2232 * probe requests after the first ones failed since some 2233 * buggy APs only support broadcast probe requests. 2234 */ 2235 if (ifmgd->probe_send_count >= unicast_limit) 2236 dst = NULL; 2237 2238 /* 2239 * When the hardware reports an accurate Tx ACK status, it's 2240 * better to send a nullfunc frame instead of a probe request, 2241 * as it will kick us off the AP quickly if we aren't associated 2242 * anymore. The timeout will be reset if the frame is ACKed by 2243 * the AP. 2244 */ 2245 ifmgd->probe_send_count++; 2246 2247 if (dst) { 2248 mutex_lock(&sdata->local->sta_mtx); 2249 sta = sta_info_get(sdata, dst); 2250 if (!WARN_ON(!sta)) 2251 ieee80211_check_fast_rx(sta); 2252 mutex_unlock(&sdata->local->sta_mtx); 2253 } 2254 2255 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2256 ifmgd->nullfunc_failed = false; 2257 ieee80211_send_nullfunc(sdata->local, sdata, false); 2258 } else { 2259 int ssid_len; 2260 2261 rcu_read_lock(); 2262 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2263 if (WARN_ON_ONCE(ssid == NULL)) 2264 ssid_len = 0; 2265 else 2266 ssid_len = ssid[1]; 2267 2268 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2269 ssid + 2, ssid_len, NULL, 2270 0, (u32) -1, true, 0, 2271 ifmgd->associated->channel, false); 2272 rcu_read_unlock(); 2273 } 2274 2275 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2276 run_again(sdata, ifmgd->probe_timeout); 2277 } 2278 2279 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2280 bool beacon) 2281 { 2282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2283 bool already = false; 2284 2285 if (!ieee80211_sdata_running(sdata)) 2286 return; 2287 2288 sdata_lock(sdata); 2289 2290 if (!ifmgd->associated) 2291 goto out; 2292 2293 mutex_lock(&sdata->local->mtx); 2294 2295 if (sdata->local->tmp_channel || sdata->local->scanning) { 2296 mutex_unlock(&sdata->local->mtx); 2297 goto out; 2298 } 2299 2300 if (beacon) { 2301 mlme_dbg_ratelimited(sdata, 2302 "detected beacon loss from AP (missed %d beacons) - probing\n", 2303 beacon_loss_count); 2304 2305 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2306 } 2307 2308 /* 2309 * The driver/our work has already reported this event or the 2310 * connection monitoring has kicked in and we have already sent 2311 * a probe request. Or maybe the AP died and the driver keeps 2312 * reporting until we disassociate... 2313 * 2314 * In either case we have to ignore the current call to this 2315 * function (except for setting the correct probe reason bit) 2316 * because otherwise we would reset the timer every time and 2317 * never check whether we received a probe response! 2318 */ 2319 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2320 already = true; 2321 2322 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2323 2324 mutex_unlock(&sdata->local->mtx); 2325 2326 if (already) 2327 goto out; 2328 2329 mutex_lock(&sdata->local->iflist_mtx); 2330 ieee80211_recalc_ps(sdata->local); 2331 mutex_unlock(&sdata->local->iflist_mtx); 2332 2333 ifmgd->probe_send_count = 0; 2334 ieee80211_mgd_probe_ap_send(sdata); 2335 out: 2336 sdata_unlock(sdata); 2337 } 2338 2339 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2340 struct ieee80211_vif *vif) 2341 { 2342 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2344 struct cfg80211_bss *cbss; 2345 struct sk_buff *skb; 2346 const u8 *ssid; 2347 int ssid_len; 2348 2349 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2350 return NULL; 2351 2352 sdata_assert_lock(sdata); 2353 2354 if (ifmgd->associated) 2355 cbss = ifmgd->associated; 2356 else if (ifmgd->auth_data) 2357 cbss = ifmgd->auth_data->bss; 2358 else if (ifmgd->assoc_data) 2359 cbss = ifmgd->assoc_data->bss; 2360 else 2361 return NULL; 2362 2363 rcu_read_lock(); 2364 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2365 if (WARN_ON_ONCE(ssid == NULL)) 2366 ssid_len = 0; 2367 else 2368 ssid_len = ssid[1]; 2369 2370 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2371 (u32) -1, cbss->channel, 2372 ssid + 2, ssid_len, 2373 NULL, 0, true); 2374 rcu_read_unlock(); 2375 2376 return skb; 2377 } 2378 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2379 2380 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2381 const u8 *buf, size_t len, bool tx, 2382 u16 reason) 2383 { 2384 struct ieee80211_event event = { 2385 .type = MLME_EVENT, 2386 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2387 .u.mlme.reason = reason, 2388 }; 2389 2390 if (tx) 2391 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2392 else 2393 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2394 2395 drv_event_callback(sdata->local, sdata, &event); 2396 } 2397 2398 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2399 { 2400 struct ieee80211_local *local = sdata->local; 2401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2402 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2403 2404 sdata_lock(sdata); 2405 if (!ifmgd->associated) { 2406 sdata_unlock(sdata); 2407 return; 2408 } 2409 2410 /* AP is probably out of range (or not reachable for another reason) so 2411 * remove the bss struct for that AP. 2412 */ 2413 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2414 2415 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2416 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2417 true, frame_buf); 2418 mutex_lock(&local->mtx); 2419 sdata->vif.csa_active = false; 2420 ifmgd->csa_waiting_bcn = false; 2421 if (sdata->csa_block_tx) { 2422 ieee80211_wake_vif_queues(local, sdata, 2423 IEEE80211_QUEUE_STOP_REASON_CSA); 2424 sdata->csa_block_tx = false; 2425 } 2426 mutex_unlock(&local->mtx); 2427 2428 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2429 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2430 2431 sdata_unlock(sdata); 2432 } 2433 2434 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2435 { 2436 struct ieee80211_sub_if_data *sdata = 2437 container_of(work, struct ieee80211_sub_if_data, 2438 u.mgd.beacon_connection_loss_work); 2439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2440 2441 if (ifmgd->associated) 2442 ifmgd->beacon_loss_count++; 2443 2444 if (ifmgd->connection_loss) { 2445 sdata_info(sdata, "Connection to AP %pM lost\n", 2446 ifmgd->bssid); 2447 __ieee80211_disconnect(sdata); 2448 } else { 2449 ieee80211_mgd_probe_ap(sdata, true); 2450 } 2451 } 2452 2453 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2454 { 2455 struct ieee80211_sub_if_data *sdata = 2456 container_of(work, struct ieee80211_sub_if_data, 2457 u.mgd.csa_connection_drop_work); 2458 2459 __ieee80211_disconnect(sdata); 2460 } 2461 2462 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2463 { 2464 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2465 struct ieee80211_hw *hw = &sdata->local->hw; 2466 2467 trace_api_beacon_loss(sdata); 2468 2469 sdata->u.mgd.connection_loss = false; 2470 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2471 } 2472 EXPORT_SYMBOL(ieee80211_beacon_loss); 2473 2474 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2475 { 2476 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2477 struct ieee80211_hw *hw = &sdata->local->hw; 2478 2479 trace_api_connection_loss(sdata); 2480 2481 sdata->u.mgd.connection_loss = true; 2482 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2483 } 2484 EXPORT_SYMBOL(ieee80211_connection_loss); 2485 2486 2487 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2488 bool assoc) 2489 { 2490 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2491 2492 sdata_assert_lock(sdata); 2493 2494 if (!assoc) { 2495 /* 2496 * we are not authenticated yet, the only timer that could be 2497 * running is the timeout for the authentication response which 2498 * which is not relevant anymore. 2499 */ 2500 del_timer_sync(&sdata->u.mgd.timer); 2501 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2502 2503 eth_zero_addr(sdata->u.mgd.bssid); 2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2505 sdata->u.mgd.flags = 0; 2506 mutex_lock(&sdata->local->mtx); 2507 ieee80211_vif_release_channel(sdata); 2508 mutex_unlock(&sdata->local->mtx); 2509 } 2510 2511 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2512 kfree(auth_data); 2513 sdata->u.mgd.auth_data = NULL; 2514 } 2515 2516 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2517 bool assoc, bool abandon) 2518 { 2519 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2520 2521 sdata_assert_lock(sdata); 2522 2523 if (!assoc) { 2524 /* 2525 * we are not associated yet, the only timer that could be 2526 * running is the timeout for the association response which 2527 * which is not relevant anymore. 2528 */ 2529 del_timer_sync(&sdata->u.mgd.timer); 2530 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2531 2532 eth_zero_addr(sdata->u.mgd.bssid); 2533 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2534 sdata->u.mgd.flags = 0; 2535 sdata->vif.mu_mimo_owner = false; 2536 2537 mutex_lock(&sdata->local->mtx); 2538 ieee80211_vif_release_channel(sdata); 2539 mutex_unlock(&sdata->local->mtx); 2540 2541 if (abandon) 2542 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2543 } 2544 2545 kfree(assoc_data); 2546 sdata->u.mgd.assoc_data = NULL; 2547 } 2548 2549 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2550 struct ieee80211_mgmt *mgmt, size_t len) 2551 { 2552 struct ieee80211_local *local = sdata->local; 2553 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2554 u8 *pos; 2555 struct ieee802_11_elems elems; 2556 u32 tx_flags = 0; 2557 2558 pos = mgmt->u.auth.variable; 2559 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2560 if (!elems.challenge) 2561 return; 2562 auth_data->expected_transaction = 4; 2563 drv_mgd_prepare_tx(sdata->local, sdata); 2564 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2565 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2566 IEEE80211_TX_INTFL_MLME_CONN_TX; 2567 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2568 elems.challenge - 2, elems.challenge_len + 2, 2569 auth_data->bss->bssid, auth_data->bss->bssid, 2570 auth_data->key, auth_data->key_len, 2571 auth_data->key_idx, tx_flags); 2572 } 2573 2574 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2575 struct ieee80211_mgmt *mgmt, size_t len) 2576 { 2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2578 u8 bssid[ETH_ALEN]; 2579 u16 auth_alg, auth_transaction, status_code; 2580 struct sta_info *sta; 2581 struct ieee80211_event event = { 2582 .type = MLME_EVENT, 2583 .u.mlme.data = AUTH_EVENT, 2584 }; 2585 2586 sdata_assert_lock(sdata); 2587 2588 if (len < 24 + 6) 2589 return; 2590 2591 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2592 return; 2593 2594 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2595 2596 if (!ether_addr_equal(bssid, mgmt->bssid)) 2597 return; 2598 2599 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2600 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2601 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2602 2603 if (auth_alg != ifmgd->auth_data->algorithm || 2604 auth_transaction != ifmgd->auth_data->expected_transaction) { 2605 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2606 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2607 auth_transaction, 2608 ifmgd->auth_data->expected_transaction); 2609 return; 2610 } 2611 2612 if (status_code != WLAN_STATUS_SUCCESS) { 2613 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2614 mgmt->sa, status_code); 2615 ieee80211_destroy_auth_data(sdata, false); 2616 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2617 event.u.mlme.status = MLME_DENIED; 2618 event.u.mlme.reason = status_code; 2619 drv_event_callback(sdata->local, sdata, &event); 2620 return; 2621 } 2622 2623 switch (ifmgd->auth_data->algorithm) { 2624 case WLAN_AUTH_OPEN: 2625 case WLAN_AUTH_LEAP: 2626 case WLAN_AUTH_FT: 2627 case WLAN_AUTH_SAE: 2628 case WLAN_AUTH_FILS_SK: 2629 case WLAN_AUTH_FILS_SK_PFS: 2630 case WLAN_AUTH_FILS_PK: 2631 break; 2632 case WLAN_AUTH_SHARED_KEY: 2633 if (ifmgd->auth_data->expected_transaction != 4) { 2634 ieee80211_auth_challenge(sdata, mgmt, len); 2635 /* need another frame */ 2636 return; 2637 } 2638 break; 2639 default: 2640 WARN_ONCE(1, "invalid auth alg %d", 2641 ifmgd->auth_data->algorithm); 2642 return; 2643 } 2644 2645 event.u.mlme.status = MLME_SUCCESS; 2646 drv_event_callback(sdata->local, sdata, &event); 2647 sdata_info(sdata, "authenticated\n"); 2648 ifmgd->auth_data->done = true; 2649 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2650 ifmgd->auth_data->timeout_started = true; 2651 run_again(sdata, ifmgd->auth_data->timeout); 2652 2653 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2654 ifmgd->auth_data->expected_transaction != 2) { 2655 /* 2656 * Report auth frame to user space for processing since another 2657 * round of Authentication frames is still needed. 2658 */ 2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2660 return; 2661 } 2662 2663 /* move station state to auth */ 2664 mutex_lock(&sdata->local->sta_mtx); 2665 sta = sta_info_get(sdata, bssid); 2666 if (!sta) { 2667 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2668 goto out_err; 2669 } 2670 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2671 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2672 goto out_err; 2673 } 2674 mutex_unlock(&sdata->local->sta_mtx); 2675 2676 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2677 return; 2678 out_err: 2679 mutex_unlock(&sdata->local->sta_mtx); 2680 /* ignore frame -- wait for timeout */ 2681 } 2682 2683 #define case_WLAN(type) \ 2684 case WLAN_REASON_##type: return #type 2685 2686 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2687 { 2688 switch (reason_code) { 2689 case_WLAN(UNSPECIFIED); 2690 case_WLAN(PREV_AUTH_NOT_VALID); 2691 case_WLAN(DEAUTH_LEAVING); 2692 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2693 case_WLAN(DISASSOC_AP_BUSY); 2694 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2695 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2696 case_WLAN(DISASSOC_STA_HAS_LEFT); 2697 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2698 case_WLAN(DISASSOC_BAD_POWER); 2699 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2700 case_WLAN(INVALID_IE); 2701 case_WLAN(MIC_FAILURE); 2702 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2703 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2704 case_WLAN(IE_DIFFERENT); 2705 case_WLAN(INVALID_GROUP_CIPHER); 2706 case_WLAN(INVALID_PAIRWISE_CIPHER); 2707 case_WLAN(INVALID_AKMP); 2708 case_WLAN(UNSUPP_RSN_VERSION); 2709 case_WLAN(INVALID_RSN_IE_CAP); 2710 case_WLAN(IEEE8021X_FAILED); 2711 case_WLAN(CIPHER_SUITE_REJECTED); 2712 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2713 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2714 case_WLAN(DISASSOC_LOW_ACK); 2715 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2716 case_WLAN(QSTA_LEAVE_QBSS); 2717 case_WLAN(QSTA_NOT_USE); 2718 case_WLAN(QSTA_REQUIRE_SETUP); 2719 case_WLAN(QSTA_TIMEOUT); 2720 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2721 case_WLAN(MESH_PEER_CANCELED); 2722 case_WLAN(MESH_MAX_PEERS); 2723 case_WLAN(MESH_CONFIG); 2724 case_WLAN(MESH_CLOSE); 2725 case_WLAN(MESH_MAX_RETRIES); 2726 case_WLAN(MESH_CONFIRM_TIMEOUT); 2727 case_WLAN(MESH_INVALID_GTK); 2728 case_WLAN(MESH_INCONSISTENT_PARAM); 2729 case_WLAN(MESH_INVALID_SECURITY); 2730 case_WLAN(MESH_PATH_ERROR); 2731 case_WLAN(MESH_PATH_NOFORWARD); 2732 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2733 case_WLAN(MAC_EXISTS_IN_MBSS); 2734 case_WLAN(MESH_CHAN_REGULATORY); 2735 case_WLAN(MESH_CHAN); 2736 default: return "<unknown>"; 2737 } 2738 } 2739 2740 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2741 struct ieee80211_mgmt *mgmt, size_t len) 2742 { 2743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2744 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2745 2746 sdata_assert_lock(sdata); 2747 2748 if (len < 24 + 2) 2749 return; 2750 2751 if (ifmgd->associated && 2752 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2753 const u8 *bssid = ifmgd->associated->bssid; 2754 2755 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2756 bssid, reason_code, 2757 ieee80211_get_reason_code_string(reason_code)); 2758 2759 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2760 2761 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2762 reason_code); 2763 return; 2764 } 2765 2766 if (ifmgd->assoc_data && 2767 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2768 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2769 2770 sdata_info(sdata, 2771 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2772 bssid, reason_code, 2773 ieee80211_get_reason_code_string(reason_code)); 2774 2775 ieee80211_destroy_assoc_data(sdata, false, true); 2776 2777 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2778 return; 2779 } 2780 } 2781 2782 2783 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2784 struct ieee80211_mgmt *mgmt, size_t len) 2785 { 2786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2787 u16 reason_code; 2788 2789 sdata_assert_lock(sdata); 2790 2791 if (len < 24 + 2) 2792 return; 2793 2794 if (!ifmgd->associated || 2795 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2796 return; 2797 2798 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2799 2800 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2801 mgmt->sa, reason_code); 2802 2803 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2804 2805 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2806 } 2807 2808 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2809 u8 *supp_rates, unsigned int supp_rates_len, 2810 u32 *rates, u32 *basic_rates, 2811 bool *have_higher_than_11mbit, 2812 int *min_rate, int *min_rate_index, 2813 int shift, u32 rate_flags) 2814 { 2815 int i, j; 2816 2817 for (i = 0; i < supp_rates_len; i++) { 2818 int rate = supp_rates[i] & 0x7f; 2819 bool is_basic = !!(supp_rates[i] & 0x80); 2820 2821 if ((rate * 5 * (1 << shift)) > 110) 2822 *have_higher_than_11mbit = true; 2823 2824 /* 2825 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2826 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2827 * 2828 * Note: Even through the membership selector and the basic 2829 * rate flag share the same bit, they are not exactly 2830 * the same. 2831 */ 2832 if (!!(supp_rates[i] & 0x80) && 2833 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2834 continue; 2835 2836 for (j = 0; j < sband->n_bitrates; j++) { 2837 struct ieee80211_rate *br; 2838 int brate; 2839 2840 br = &sband->bitrates[j]; 2841 if ((rate_flags & br->flags) != rate_flags) 2842 continue; 2843 2844 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2845 if (brate == rate) { 2846 *rates |= BIT(j); 2847 if (is_basic) 2848 *basic_rates |= BIT(j); 2849 if ((rate * 5) < *min_rate) { 2850 *min_rate = rate * 5; 2851 *min_rate_index = j; 2852 } 2853 break; 2854 } 2855 } 2856 } 2857 } 2858 2859 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2860 struct cfg80211_bss *cbss, 2861 struct ieee80211_mgmt *mgmt, size_t len) 2862 { 2863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2864 struct ieee80211_local *local = sdata->local; 2865 struct ieee80211_supported_band *sband; 2866 struct sta_info *sta; 2867 u8 *pos; 2868 u16 capab_info, aid; 2869 struct ieee802_11_elems elems; 2870 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2871 const struct cfg80211_bss_ies *bss_ies = NULL; 2872 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2873 u32 changed = 0; 2874 int err; 2875 bool ret; 2876 2877 /* AssocResp and ReassocResp have identical structure */ 2878 2879 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2880 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2881 2882 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2883 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2884 aid); 2885 aid &= ~(BIT(15) | BIT(14)); 2886 2887 ifmgd->broken_ap = false; 2888 2889 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2890 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2891 aid); 2892 aid = 0; 2893 ifmgd->broken_ap = true; 2894 } 2895 2896 pos = mgmt->u.assoc_resp.variable; 2897 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2898 2899 if (!elems.supp_rates) { 2900 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2901 return false; 2902 } 2903 2904 ifmgd->aid = aid; 2905 ifmgd->tdls_chan_switch_prohibited = 2906 elems.ext_capab && elems.ext_capab_len >= 5 && 2907 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2908 2909 /* 2910 * Some APs are erroneously not including some information in their 2911 * (re)association response frames. Try to recover by using the data 2912 * from the beacon or probe response. This seems to afflict mobile 2913 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2914 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2915 */ 2916 if ((assoc_data->wmm && !elems.wmm_param) || 2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2918 (!elems.ht_cap_elem || !elems.ht_operation)) || 2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2920 (!elems.vht_cap_elem || !elems.vht_operation))) { 2921 const struct cfg80211_bss_ies *ies; 2922 struct ieee802_11_elems bss_elems; 2923 2924 rcu_read_lock(); 2925 ies = rcu_dereference(cbss->ies); 2926 if (ies) 2927 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2928 GFP_ATOMIC); 2929 rcu_read_unlock(); 2930 if (!bss_ies) 2931 return false; 2932 2933 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2934 false, &bss_elems); 2935 if (assoc_data->wmm && 2936 !elems.wmm_param && bss_elems.wmm_param) { 2937 elems.wmm_param = bss_elems.wmm_param; 2938 sdata_info(sdata, 2939 "AP bug: WMM param missing from AssocResp\n"); 2940 } 2941 2942 /* 2943 * Also check if we requested HT/VHT, otherwise the AP doesn't 2944 * have to include the IEs in the (re)association response. 2945 */ 2946 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2948 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2949 sdata_info(sdata, 2950 "AP bug: HT capability missing from AssocResp\n"); 2951 } 2952 if (!elems.ht_operation && bss_elems.ht_operation && 2953 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2954 elems.ht_operation = bss_elems.ht_operation; 2955 sdata_info(sdata, 2956 "AP bug: HT operation missing from AssocResp\n"); 2957 } 2958 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2959 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2960 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2961 sdata_info(sdata, 2962 "AP bug: VHT capa missing from AssocResp\n"); 2963 } 2964 if (!elems.vht_operation && bss_elems.vht_operation && 2965 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2966 elems.vht_operation = bss_elems.vht_operation; 2967 sdata_info(sdata, 2968 "AP bug: VHT operation missing from AssocResp\n"); 2969 } 2970 } 2971 2972 /* 2973 * We previously checked these in the beacon/probe response, so 2974 * they should be present here. This is just a safety net. 2975 */ 2976 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2977 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2978 sdata_info(sdata, 2979 "HT AP is missing WMM params or HT capability/operation\n"); 2980 ret = false; 2981 goto out; 2982 } 2983 2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2985 (!elems.vht_cap_elem || !elems.vht_operation)) { 2986 sdata_info(sdata, 2987 "VHT AP is missing VHT capability/operation\n"); 2988 ret = false; 2989 goto out; 2990 } 2991 2992 mutex_lock(&sdata->local->sta_mtx); 2993 /* 2994 * station info was already allocated and inserted before 2995 * the association and should be available to us 2996 */ 2997 sta = sta_info_get(sdata, cbss->bssid); 2998 if (WARN_ON(!sta)) { 2999 mutex_unlock(&sdata->local->sta_mtx); 3000 ret = false; 3001 goto out; 3002 } 3003 3004 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 3005 3006 /* Set up internal HT/VHT capabilities */ 3007 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3008 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3009 elems.ht_cap_elem, sta); 3010 3011 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3012 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3013 elems.vht_cap_elem, sta); 3014 3015 /* 3016 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3017 * in their association response, so ignore that data for our own 3018 * configuration. If it changed since the last beacon, we'll get the 3019 * next beacon and update then. 3020 */ 3021 3022 /* 3023 * If an operating mode notification IE is present, override the 3024 * NSS calculation (that would be done in rate_control_rate_init()) 3025 * and use the # of streams from that element. 3026 */ 3027 if (elems.opmode_notif && 3028 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3029 u8 nss; 3030 3031 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3032 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3033 nss += 1; 3034 sta->sta.rx_nss = nss; 3035 } 3036 3037 rate_control_rate_init(sta); 3038 3039 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3040 set_sta_flag(sta, WLAN_STA_MFP); 3041 sta->sta.mfp = true; 3042 } else { 3043 sta->sta.mfp = false; 3044 } 3045 3046 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3047 3048 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3049 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3050 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3051 if (err) { 3052 sdata_info(sdata, 3053 "failed to move station %pM to desired state\n", 3054 sta->sta.addr); 3055 WARN_ON(__sta_info_destroy(sta)); 3056 mutex_unlock(&sdata->local->sta_mtx); 3057 ret = false; 3058 goto out; 3059 } 3060 3061 mutex_unlock(&sdata->local->sta_mtx); 3062 3063 /* 3064 * Always handle WMM once after association regardless 3065 * of the first value the AP uses. Setting -1 here has 3066 * that effect because the AP values is an unsigned 3067 * 4-bit value. 3068 */ 3069 ifmgd->wmm_last_param_set = -1; 3070 3071 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3072 ieee80211_set_wmm_default(sdata, false, false); 3073 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3074 elems.wmm_param_len)) { 3075 /* still enable QoS since we might have HT/VHT */ 3076 ieee80211_set_wmm_default(sdata, false, true); 3077 /* set the disable-WMM flag in this case to disable 3078 * tracking WMM parameter changes in the beacon if 3079 * the parameters weren't actually valid. Doing so 3080 * avoids changing parameters very strangely when 3081 * the AP is going back and forth between valid and 3082 * invalid parameters. 3083 */ 3084 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3085 } 3086 changed |= BSS_CHANGED_QOS; 3087 3088 /* set AID and assoc capability, 3089 * ieee80211_set_associated() will tell the driver */ 3090 bss_conf->aid = aid; 3091 bss_conf->assoc_capability = capab_info; 3092 ieee80211_set_associated(sdata, cbss, changed); 3093 3094 /* 3095 * If we're using 4-addr mode, let the AP know that we're 3096 * doing so, so that it can create the STA VLAN on its side 3097 */ 3098 if (ifmgd->use_4addr) 3099 ieee80211_send_4addr_nullfunc(local, sdata); 3100 3101 /* 3102 * Start timer to probe the connection to the AP now. 3103 * Also start the timer that will detect beacon loss. 3104 */ 3105 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3106 ieee80211_sta_reset_beacon_monitor(sdata); 3107 3108 ret = true; 3109 out: 3110 kfree(bss_ies); 3111 return ret; 3112 } 3113 3114 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3115 struct ieee80211_mgmt *mgmt, 3116 size_t len) 3117 { 3118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3119 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3120 u16 capab_info, status_code, aid; 3121 struct ieee802_11_elems elems; 3122 int ac, uapsd_queues = -1; 3123 u8 *pos; 3124 bool reassoc; 3125 struct cfg80211_bss *bss; 3126 struct ieee80211_event event = { 3127 .type = MLME_EVENT, 3128 .u.mlme.data = ASSOC_EVENT, 3129 }; 3130 3131 sdata_assert_lock(sdata); 3132 3133 if (!assoc_data) 3134 return; 3135 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3136 return; 3137 3138 /* 3139 * AssocResp and ReassocResp have identical structure, so process both 3140 * of them in this function. 3141 */ 3142 3143 if (len < 24 + 6) 3144 return; 3145 3146 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3147 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3148 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3149 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3150 3151 sdata_info(sdata, 3152 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3153 reassoc ? "Rea" : "A", mgmt->sa, 3154 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3155 3156 if (assoc_data->fils_kek_len && 3157 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3158 return; 3159 3160 pos = mgmt->u.assoc_resp.variable; 3161 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3162 3163 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3164 elems.timeout_int && 3165 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3166 u32 tu, ms; 3167 tu = le32_to_cpu(elems.timeout_int->value); 3168 ms = tu * 1024 / 1000; 3169 sdata_info(sdata, 3170 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3171 mgmt->sa, tu, ms); 3172 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3173 assoc_data->timeout_started = true; 3174 if (ms > IEEE80211_ASSOC_TIMEOUT) 3175 run_again(sdata, assoc_data->timeout); 3176 return; 3177 } 3178 3179 bss = assoc_data->bss; 3180 3181 if (status_code != WLAN_STATUS_SUCCESS) { 3182 sdata_info(sdata, "%pM denied association (code=%d)\n", 3183 mgmt->sa, status_code); 3184 ieee80211_destroy_assoc_data(sdata, false, false); 3185 event.u.mlme.status = MLME_DENIED; 3186 event.u.mlme.reason = status_code; 3187 drv_event_callback(sdata->local, sdata, &event); 3188 } else { 3189 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3190 /* oops -- internal error -- send timeout for now */ 3191 ieee80211_destroy_assoc_data(sdata, false, false); 3192 cfg80211_assoc_timeout(sdata->dev, bss); 3193 return; 3194 } 3195 event.u.mlme.status = MLME_SUCCESS; 3196 drv_event_callback(sdata->local, sdata, &event); 3197 sdata_info(sdata, "associated\n"); 3198 3199 /* 3200 * destroy assoc_data afterwards, as otherwise an idle 3201 * recalc after assoc_data is NULL but before associated 3202 * is set can cause the interface to go idle 3203 */ 3204 ieee80211_destroy_assoc_data(sdata, true, false); 3205 3206 /* get uapsd queues configuration */ 3207 uapsd_queues = 0; 3208 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3209 if (sdata->tx_conf[ac].uapsd) 3210 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3211 } 3212 3213 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3214 } 3215 3216 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3217 struct ieee80211_mgmt *mgmt, size_t len, 3218 struct ieee80211_rx_status *rx_status, 3219 struct ieee802_11_elems *elems) 3220 { 3221 struct ieee80211_local *local = sdata->local; 3222 struct ieee80211_bss *bss; 3223 struct ieee80211_channel *channel; 3224 3225 sdata_assert_lock(sdata); 3226 3227 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3228 if (!channel) 3229 return; 3230 3231 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3232 channel); 3233 if (bss) { 3234 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3235 ieee80211_rx_bss_put(local, bss); 3236 } 3237 } 3238 3239 3240 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3241 struct sk_buff *skb) 3242 { 3243 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3244 struct ieee80211_if_managed *ifmgd; 3245 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3246 size_t baselen, len = skb->len; 3247 struct ieee802_11_elems elems; 3248 3249 ifmgd = &sdata->u.mgd; 3250 3251 sdata_assert_lock(sdata); 3252 3253 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3254 return; /* ignore ProbeResp to foreign address */ 3255 3256 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3257 if (baselen > len) 3258 return; 3259 3260 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3261 false, &elems); 3262 3263 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3264 3265 if (ifmgd->associated && 3266 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3267 ieee80211_reset_ap_probe(sdata); 3268 } 3269 3270 /* 3271 * This is the canonical list of information elements we care about, 3272 * the filter code also gives us all changes to the Microsoft OUI 3273 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3274 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3275 * changes to requested client power. 3276 * 3277 * We implement beacon filtering in software since that means we can 3278 * avoid processing the frame here and in cfg80211, and userspace 3279 * will not be able to tell whether the hardware supports it or not. 3280 * 3281 * XXX: This list needs to be dynamic -- userspace needs to be able to 3282 * add items it requires. It also needs to be able to tell us to 3283 * look out for other vendor IEs. 3284 */ 3285 static const u64 care_about_ies = 3286 (1ULL << WLAN_EID_COUNTRY) | 3287 (1ULL << WLAN_EID_ERP_INFO) | 3288 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3289 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3290 (1ULL << WLAN_EID_HT_CAPABILITY) | 3291 (1ULL << WLAN_EID_HT_OPERATION) | 3292 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3293 3294 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3295 struct ieee80211_mgmt *mgmt, size_t len, 3296 struct ieee80211_rx_status *rx_status) 3297 { 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3300 size_t baselen; 3301 struct ieee802_11_elems elems; 3302 struct ieee80211_local *local = sdata->local; 3303 struct ieee80211_chanctx_conf *chanctx_conf; 3304 struct ieee80211_channel *chan; 3305 struct sta_info *sta; 3306 u32 changed = 0; 3307 bool erp_valid; 3308 u8 erp_value = 0; 3309 u32 ncrc; 3310 u8 *bssid; 3311 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3312 3313 sdata_assert_lock(sdata); 3314 3315 /* Process beacon from the current BSS */ 3316 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3317 if (baselen > len) 3318 return; 3319 3320 rcu_read_lock(); 3321 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3322 if (!chanctx_conf) { 3323 rcu_read_unlock(); 3324 return; 3325 } 3326 3327 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3328 rcu_read_unlock(); 3329 return; 3330 } 3331 chan = chanctx_conf->def.chan; 3332 rcu_read_unlock(); 3333 3334 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3335 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3336 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3337 len - baselen, false, &elems); 3338 3339 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3340 if (elems.tim && !elems.parse_error) { 3341 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3342 ifmgd->dtim_period = tim_ie->dtim_period; 3343 } 3344 ifmgd->have_beacon = true; 3345 ifmgd->assoc_data->need_beacon = false; 3346 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3347 sdata->vif.bss_conf.sync_tsf = 3348 le64_to_cpu(mgmt->u.beacon.timestamp); 3349 sdata->vif.bss_conf.sync_device_ts = 3350 rx_status->device_timestamp; 3351 if (elems.tim) 3352 sdata->vif.bss_conf.sync_dtim_count = 3353 elems.tim->dtim_count; 3354 else 3355 sdata->vif.bss_conf.sync_dtim_count = 0; 3356 } 3357 /* continue assoc process */ 3358 ifmgd->assoc_data->timeout = jiffies; 3359 ifmgd->assoc_data->timeout_started = true; 3360 run_again(sdata, ifmgd->assoc_data->timeout); 3361 return; 3362 } 3363 3364 if (!ifmgd->associated || 3365 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3366 return; 3367 bssid = ifmgd->associated->bssid; 3368 3369 /* Track average RSSI from the Beacon frames of the current AP */ 3370 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3371 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3372 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3373 ifmgd->last_cqm_event_signal = 0; 3374 ifmgd->count_beacon_signal = 1; 3375 ifmgd->last_ave_beacon_signal = 0; 3376 } else { 3377 ifmgd->count_beacon_signal++; 3378 } 3379 3380 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3381 3382 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3383 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3384 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3385 int last_sig = ifmgd->last_ave_beacon_signal; 3386 struct ieee80211_event event = { 3387 .type = RSSI_EVENT, 3388 }; 3389 3390 /* 3391 * if signal crosses either of the boundaries, invoke callback 3392 * with appropriate parameters 3393 */ 3394 if (sig > ifmgd->rssi_max_thold && 3395 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3396 ifmgd->last_ave_beacon_signal = sig; 3397 event.u.rssi.data = RSSI_EVENT_HIGH; 3398 drv_event_callback(local, sdata, &event); 3399 } else if (sig < ifmgd->rssi_min_thold && 3400 (last_sig >= ifmgd->rssi_max_thold || 3401 last_sig == 0)) { 3402 ifmgd->last_ave_beacon_signal = sig; 3403 event.u.rssi.data = RSSI_EVENT_LOW; 3404 drv_event_callback(local, sdata, &event); 3405 } 3406 } 3407 3408 if (bss_conf->cqm_rssi_thold && 3409 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3410 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3411 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3412 int last_event = ifmgd->last_cqm_event_signal; 3413 int thold = bss_conf->cqm_rssi_thold; 3414 int hyst = bss_conf->cqm_rssi_hyst; 3415 3416 if (sig < thold && 3417 (last_event == 0 || sig < last_event - hyst)) { 3418 ifmgd->last_cqm_event_signal = sig; 3419 ieee80211_cqm_rssi_notify( 3420 &sdata->vif, 3421 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3422 sig, GFP_KERNEL); 3423 } else if (sig > thold && 3424 (last_event == 0 || sig > last_event + hyst)) { 3425 ifmgd->last_cqm_event_signal = sig; 3426 ieee80211_cqm_rssi_notify( 3427 &sdata->vif, 3428 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3429 sig, GFP_KERNEL); 3430 } 3431 } 3432 3433 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3434 mlme_dbg_ratelimited(sdata, 3435 "cancelling AP probe due to a received beacon\n"); 3436 ieee80211_reset_ap_probe(sdata); 3437 } 3438 3439 /* 3440 * Push the beacon loss detection into the future since 3441 * we are processing a beacon from the AP just now. 3442 */ 3443 ieee80211_sta_reset_beacon_monitor(sdata); 3444 3445 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3446 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3447 len - baselen, false, &elems, 3448 care_about_ies, ncrc); 3449 3450 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3451 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3452 if (local->hw.conf.dynamic_ps_timeout > 0) { 3453 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3454 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3455 ieee80211_hw_config(local, 3456 IEEE80211_CONF_CHANGE_PS); 3457 } 3458 ieee80211_send_nullfunc(local, sdata, false); 3459 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3460 local->pspolling = true; 3461 3462 /* 3463 * Here is assumed that the driver will be 3464 * able to send ps-poll frame and receive a 3465 * response even though power save mode is 3466 * enabled, but some drivers might require 3467 * to disable power save here. This needs 3468 * to be investigated. 3469 */ 3470 ieee80211_send_pspoll(local, sdata); 3471 } 3472 } 3473 3474 if (sdata->vif.p2p || 3475 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3476 struct ieee80211_p2p_noa_attr noa = {}; 3477 int ret; 3478 3479 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3480 len - baselen, 3481 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3482 (u8 *) &noa, sizeof(noa)); 3483 if (ret >= 2) { 3484 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3485 /* valid noa_attr and index changed */ 3486 sdata->u.mgd.p2p_noa_index = noa.index; 3487 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3488 changed |= BSS_CHANGED_P2P_PS; 3489 /* 3490 * make sure we update all information, the CRC 3491 * mechanism doesn't look at P2P attributes. 3492 */ 3493 ifmgd->beacon_crc_valid = false; 3494 } 3495 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3496 /* noa_attr not found and we had valid noa_attr before */ 3497 sdata->u.mgd.p2p_noa_index = -1; 3498 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3499 changed |= BSS_CHANGED_P2P_PS; 3500 ifmgd->beacon_crc_valid = false; 3501 } 3502 } 3503 3504 if (ifmgd->csa_waiting_bcn) 3505 ieee80211_chswitch_post_beacon(sdata); 3506 3507 /* 3508 * Update beacon timing and dtim count on every beacon appearance. This 3509 * will allow the driver to use the most updated values. Do it before 3510 * comparing this one with last received beacon. 3511 * IMPORTANT: These parameters would possibly be out of sync by the time 3512 * the driver will use them. The synchronized view is currently 3513 * guaranteed only in certain callbacks. 3514 */ 3515 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3516 sdata->vif.bss_conf.sync_tsf = 3517 le64_to_cpu(mgmt->u.beacon.timestamp); 3518 sdata->vif.bss_conf.sync_device_ts = 3519 rx_status->device_timestamp; 3520 if (elems.tim) 3521 sdata->vif.bss_conf.sync_dtim_count = 3522 elems.tim->dtim_count; 3523 else 3524 sdata->vif.bss_conf.sync_dtim_count = 0; 3525 } 3526 3527 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3528 return; 3529 ifmgd->beacon_crc = ncrc; 3530 ifmgd->beacon_crc_valid = true; 3531 3532 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3533 3534 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3535 rx_status->device_timestamp, 3536 &elems, true); 3537 3538 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3539 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3540 elems.wmm_param_len)) 3541 changed |= BSS_CHANGED_QOS; 3542 3543 /* 3544 * If we haven't had a beacon before, tell the driver about the 3545 * DTIM period (and beacon timing if desired) now. 3546 */ 3547 if (!ifmgd->have_beacon) { 3548 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3549 if (elems.tim) 3550 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3551 else 3552 bss_conf->dtim_period = 1; 3553 3554 changed |= BSS_CHANGED_BEACON_INFO; 3555 ifmgd->have_beacon = true; 3556 3557 mutex_lock(&local->iflist_mtx); 3558 ieee80211_recalc_ps(local); 3559 mutex_unlock(&local->iflist_mtx); 3560 3561 ieee80211_recalc_ps_vif(sdata); 3562 } 3563 3564 if (elems.erp_info) { 3565 erp_valid = true; 3566 erp_value = elems.erp_info[0]; 3567 } else { 3568 erp_valid = false; 3569 } 3570 changed |= ieee80211_handle_bss_capability(sdata, 3571 le16_to_cpu(mgmt->u.beacon.capab_info), 3572 erp_valid, erp_value); 3573 3574 mutex_lock(&local->sta_mtx); 3575 sta = sta_info_get(sdata, bssid); 3576 3577 if (ieee80211_config_bw(sdata, sta, 3578 elems.ht_cap_elem, elems.ht_operation, 3579 elems.vht_operation, bssid, &changed)) { 3580 mutex_unlock(&local->sta_mtx); 3581 sdata_info(sdata, 3582 "failed to follow AP %pM bandwidth change, disconnect\n", 3583 bssid); 3584 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3585 WLAN_REASON_DEAUTH_LEAVING, 3586 true, deauth_buf); 3587 ieee80211_report_disconnect(sdata, deauth_buf, 3588 sizeof(deauth_buf), true, 3589 WLAN_REASON_DEAUTH_LEAVING); 3590 return; 3591 } 3592 3593 if (sta && elems.opmode_notif) 3594 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3595 rx_status->band); 3596 mutex_unlock(&local->sta_mtx); 3597 3598 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3599 elems.country_elem, 3600 elems.country_elem_len, 3601 elems.pwr_constr_elem, 3602 elems.cisco_dtpc_elem); 3603 3604 ieee80211_bss_info_change_notify(sdata, changed); 3605 } 3606 3607 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3608 struct sk_buff *skb) 3609 { 3610 struct ieee80211_rx_status *rx_status; 3611 struct ieee80211_mgmt *mgmt; 3612 u16 fc; 3613 struct ieee802_11_elems elems; 3614 int ies_len; 3615 3616 rx_status = (struct ieee80211_rx_status *) skb->cb; 3617 mgmt = (struct ieee80211_mgmt *) skb->data; 3618 fc = le16_to_cpu(mgmt->frame_control); 3619 3620 sdata_lock(sdata); 3621 3622 switch (fc & IEEE80211_FCTL_STYPE) { 3623 case IEEE80211_STYPE_BEACON: 3624 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3625 break; 3626 case IEEE80211_STYPE_PROBE_RESP: 3627 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3628 break; 3629 case IEEE80211_STYPE_AUTH: 3630 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3631 break; 3632 case IEEE80211_STYPE_DEAUTH: 3633 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3634 break; 3635 case IEEE80211_STYPE_DISASSOC: 3636 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3637 break; 3638 case IEEE80211_STYPE_ASSOC_RESP: 3639 case IEEE80211_STYPE_REASSOC_RESP: 3640 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3641 break; 3642 case IEEE80211_STYPE_ACTION: 3643 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3644 ies_len = skb->len - 3645 offsetof(struct ieee80211_mgmt, 3646 u.action.u.chan_switch.variable); 3647 3648 if (ies_len < 0) 3649 break; 3650 3651 ieee802_11_parse_elems( 3652 mgmt->u.action.u.chan_switch.variable, 3653 ies_len, true, &elems); 3654 3655 if (elems.parse_error) 3656 break; 3657 3658 ieee80211_sta_process_chanswitch(sdata, 3659 rx_status->mactime, 3660 rx_status->device_timestamp, 3661 &elems, false); 3662 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3663 ies_len = skb->len - 3664 offsetof(struct ieee80211_mgmt, 3665 u.action.u.ext_chan_switch.variable); 3666 3667 if (ies_len < 0) 3668 break; 3669 3670 ieee802_11_parse_elems( 3671 mgmt->u.action.u.ext_chan_switch.variable, 3672 ies_len, true, &elems); 3673 3674 if (elems.parse_error) 3675 break; 3676 3677 /* for the handling code pretend this was also an IE */ 3678 elems.ext_chansw_ie = 3679 &mgmt->u.action.u.ext_chan_switch.data; 3680 3681 ieee80211_sta_process_chanswitch(sdata, 3682 rx_status->mactime, 3683 rx_status->device_timestamp, 3684 &elems, false); 3685 } 3686 break; 3687 } 3688 sdata_unlock(sdata); 3689 } 3690 3691 static void ieee80211_sta_timer(unsigned long data) 3692 { 3693 struct ieee80211_sub_if_data *sdata = 3694 (struct ieee80211_sub_if_data *) data; 3695 3696 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3697 } 3698 3699 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3700 u8 *bssid, u8 reason, bool tx) 3701 { 3702 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3703 3704 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3705 tx, frame_buf); 3706 3707 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3708 reason); 3709 } 3710 3711 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3712 { 3713 struct ieee80211_local *local = sdata->local; 3714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3715 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3716 u32 tx_flags = 0; 3717 u16 trans = 1; 3718 u16 status = 0; 3719 3720 sdata_assert_lock(sdata); 3721 3722 if (WARN_ON_ONCE(!auth_data)) 3723 return -EINVAL; 3724 3725 auth_data->tries++; 3726 3727 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3728 sdata_info(sdata, "authentication with %pM timed out\n", 3729 auth_data->bss->bssid); 3730 3731 /* 3732 * Most likely AP is not in the range so remove the 3733 * bss struct for that AP. 3734 */ 3735 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3736 3737 return -ETIMEDOUT; 3738 } 3739 3740 drv_mgd_prepare_tx(local, sdata); 3741 3742 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3743 auth_data->bss->bssid, auth_data->tries, 3744 IEEE80211_AUTH_MAX_TRIES); 3745 3746 auth_data->expected_transaction = 2; 3747 3748 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3749 trans = auth_data->sae_trans; 3750 status = auth_data->sae_status; 3751 auth_data->expected_transaction = trans; 3752 } 3753 3754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3756 IEEE80211_TX_INTFL_MLME_CONN_TX; 3757 3758 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3759 auth_data->data, auth_data->data_len, 3760 auth_data->bss->bssid, 3761 auth_data->bss->bssid, NULL, 0, 0, 3762 tx_flags); 3763 3764 if (tx_flags == 0) { 3765 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3766 auth_data->timeout_started = true; 3767 run_again(sdata, auth_data->timeout); 3768 } else { 3769 auth_data->timeout = 3770 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3771 auth_data->timeout_started = true; 3772 run_again(sdata, auth_data->timeout); 3773 } 3774 3775 return 0; 3776 } 3777 3778 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3779 { 3780 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3781 struct ieee80211_local *local = sdata->local; 3782 3783 sdata_assert_lock(sdata); 3784 3785 assoc_data->tries++; 3786 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3787 sdata_info(sdata, "association with %pM timed out\n", 3788 assoc_data->bss->bssid); 3789 3790 /* 3791 * Most likely AP is not in the range so remove the 3792 * bss struct for that AP. 3793 */ 3794 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3795 3796 return -ETIMEDOUT; 3797 } 3798 3799 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3800 assoc_data->bss->bssid, assoc_data->tries, 3801 IEEE80211_ASSOC_MAX_TRIES); 3802 ieee80211_send_assoc(sdata); 3803 3804 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3805 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3806 assoc_data->timeout_started = true; 3807 run_again(sdata, assoc_data->timeout); 3808 } else { 3809 assoc_data->timeout = 3810 round_jiffies_up(jiffies + 3811 IEEE80211_ASSOC_TIMEOUT_LONG); 3812 assoc_data->timeout_started = true; 3813 run_again(sdata, assoc_data->timeout); 3814 } 3815 3816 return 0; 3817 } 3818 3819 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3820 __le16 fc, bool acked) 3821 { 3822 struct ieee80211_local *local = sdata->local; 3823 3824 sdata->u.mgd.status_fc = fc; 3825 sdata->u.mgd.status_acked = acked; 3826 sdata->u.mgd.status_received = true; 3827 3828 ieee80211_queue_work(&local->hw, &sdata->work); 3829 } 3830 3831 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3832 { 3833 struct ieee80211_local *local = sdata->local; 3834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3835 3836 sdata_lock(sdata); 3837 3838 if (ifmgd->status_received) { 3839 __le16 fc = ifmgd->status_fc; 3840 bool status_acked = ifmgd->status_acked; 3841 3842 ifmgd->status_received = false; 3843 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3844 if (status_acked) { 3845 ifmgd->auth_data->timeout = 3846 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3847 run_again(sdata, ifmgd->auth_data->timeout); 3848 } else { 3849 ifmgd->auth_data->timeout = jiffies - 1; 3850 } 3851 ifmgd->auth_data->timeout_started = true; 3852 } else if (ifmgd->assoc_data && 3853 (ieee80211_is_assoc_req(fc) || 3854 ieee80211_is_reassoc_req(fc))) { 3855 if (status_acked) { 3856 ifmgd->assoc_data->timeout = 3857 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3858 run_again(sdata, ifmgd->assoc_data->timeout); 3859 } else { 3860 ifmgd->assoc_data->timeout = jiffies - 1; 3861 } 3862 ifmgd->assoc_data->timeout_started = true; 3863 } 3864 } 3865 3866 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3867 time_after(jiffies, ifmgd->auth_data->timeout)) { 3868 if (ifmgd->auth_data->done) { 3869 /* 3870 * ok ... we waited for assoc but userspace didn't, 3871 * so let's just kill the auth data 3872 */ 3873 ieee80211_destroy_auth_data(sdata, false); 3874 } else if (ieee80211_auth(sdata)) { 3875 u8 bssid[ETH_ALEN]; 3876 struct ieee80211_event event = { 3877 .type = MLME_EVENT, 3878 .u.mlme.data = AUTH_EVENT, 3879 .u.mlme.status = MLME_TIMEOUT, 3880 }; 3881 3882 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3883 3884 ieee80211_destroy_auth_data(sdata, false); 3885 3886 cfg80211_auth_timeout(sdata->dev, bssid); 3887 drv_event_callback(sdata->local, sdata, &event); 3888 } 3889 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3890 run_again(sdata, ifmgd->auth_data->timeout); 3891 3892 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3893 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3894 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3895 ieee80211_do_assoc(sdata)) { 3896 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3897 struct ieee80211_event event = { 3898 .type = MLME_EVENT, 3899 .u.mlme.data = ASSOC_EVENT, 3900 .u.mlme.status = MLME_TIMEOUT, 3901 }; 3902 3903 ieee80211_destroy_assoc_data(sdata, false, false); 3904 cfg80211_assoc_timeout(sdata->dev, bss); 3905 drv_event_callback(sdata->local, sdata, &event); 3906 } 3907 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3908 run_again(sdata, ifmgd->assoc_data->timeout); 3909 3910 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3911 ifmgd->associated) { 3912 u8 bssid[ETH_ALEN]; 3913 int max_tries; 3914 3915 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3916 3917 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3918 max_tries = max_nullfunc_tries; 3919 else 3920 max_tries = max_probe_tries; 3921 3922 /* ACK received for nullfunc probing frame */ 3923 if (!ifmgd->probe_send_count) 3924 ieee80211_reset_ap_probe(sdata); 3925 else if (ifmgd->nullfunc_failed) { 3926 if (ifmgd->probe_send_count < max_tries) { 3927 mlme_dbg(sdata, 3928 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3929 bssid, ifmgd->probe_send_count, 3930 max_tries); 3931 ieee80211_mgd_probe_ap_send(sdata); 3932 } else { 3933 mlme_dbg(sdata, 3934 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3935 bssid); 3936 ieee80211_sta_connection_lost(sdata, bssid, 3937 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3938 false); 3939 } 3940 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3941 run_again(sdata, ifmgd->probe_timeout); 3942 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3943 mlme_dbg(sdata, 3944 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3945 bssid, probe_wait_ms); 3946 ieee80211_sta_connection_lost(sdata, bssid, 3947 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3948 } else if (ifmgd->probe_send_count < max_tries) { 3949 mlme_dbg(sdata, 3950 "No probe response from AP %pM after %dms, try %d/%i\n", 3951 bssid, probe_wait_ms, 3952 ifmgd->probe_send_count, max_tries); 3953 ieee80211_mgd_probe_ap_send(sdata); 3954 } else { 3955 /* 3956 * We actually lost the connection ... or did we? 3957 * Let's make sure! 3958 */ 3959 mlme_dbg(sdata, 3960 "No probe response from AP %pM after %dms, disconnecting.\n", 3961 bssid, probe_wait_ms); 3962 3963 ieee80211_sta_connection_lost(sdata, bssid, 3964 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3965 } 3966 } 3967 3968 sdata_unlock(sdata); 3969 } 3970 3971 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3972 { 3973 struct ieee80211_sub_if_data *sdata = 3974 (struct ieee80211_sub_if_data *) data; 3975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3976 3977 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3978 return; 3979 3980 sdata->u.mgd.connection_loss = false; 3981 ieee80211_queue_work(&sdata->local->hw, 3982 &sdata->u.mgd.beacon_connection_loss_work); 3983 } 3984 3985 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3986 { 3987 struct ieee80211_sub_if_data *sdata = 3988 (struct ieee80211_sub_if_data *) data; 3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3990 struct ieee80211_local *local = sdata->local; 3991 3992 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3993 return; 3994 3995 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 3996 } 3997 3998 static void ieee80211_sta_monitor_work(struct work_struct *work) 3999 { 4000 struct ieee80211_sub_if_data *sdata = 4001 container_of(work, struct ieee80211_sub_if_data, 4002 u.mgd.monitor_work); 4003 4004 ieee80211_mgd_probe_ap(sdata, false); 4005 } 4006 4007 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4008 { 4009 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4010 __ieee80211_stop_poll(sdata); 4011 4012 /* let's probe the connection once */ 4013 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4014 ieee80211_queue_work(&sdata->local->hw, 4015 &sdata->u.mgd.monitor_work); 4016 } 4017 } 4018 4019 #ifdef CONFIG_PM 4020 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4021 { 4022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4023 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4024 4025 sdata_lock(sdata); 4026 4027 if (ifmgd->auth_data || ifmgd->assoc_data) { 4028 const u8 *bssid = ifmgd->auth_data ? 4029 ifmgd->auth_data->bss->bssid : 4030 ifmgd->assoc_data->bss->bssid; 4031 4032 /* 4033 * If we are trying to authenticate / associate while suspending, 4034 * cfg80211 won't know and won't actually abort those attempts, 4035 * thus we need to do that ourselves. 4036 */ 4037 ieee80211_send_deauth_disassoc(sdata, bssid, 4038 IEEE80211_STYPE_DEAUTH, 4039 WLAN_REASON_DEAUTH_LEAVING, 4040 false, frame_buf); 4041 if (ifmgd->assoc_data) 4042 ieee80211_destroy_assoc_data(sdata, false, true); 4043 if (ifmgd->auth_data) 4044 ieee80211_destroy_auth_data(sdata, false); 4045 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4046 IEEE80211_DEAUTH_FRAME_LEN); 4047 } 4048 4049 /* This is a bit of a hack - we should find a better and more generic 4050 * solution to this. Normally when suspending, cfg80211 will in fact 4051 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4052 * auth (not so important) or assoc (this is the problem) process. 4053 * 4054 * As a consequence, it can happen that we are in the process of both 4055 * associating and suspending, and receive an association response 4056 * after cfg80211 has checked if it needs to disconnect, but before 4057 * we actually set the flag to drop incoming frames. This will then 4058 * cause the workqueue flush to process the association response in 4059 * the suspend, resulting in a successful association just before it 4060 * tries to remove the interface from the driver, which now though 4061 * has a channel context assigned ... this results in issues. 4062 * 4063 * To work around this (for now) simply deauth here again if we're 4064 * now connected. 4065 */ 4066 if (ifmgd->associated && !sdata->local->wowlan) { 4067 u8 bssid[ETH_ALEN]; 4068 struct cfg80211_deauth_request req = { 4069 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4070 .bssid = bssid, 4071 }; 4072 4073 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4074 ieee80211_mgd_deauth(sdata, &req); 4075 } 4076 4077 sdata_unlock(sdata); 4078 } 4079 4080 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4081 { 4082 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4083 4084 sdata_lock(sdata); 4085 if (!ifmgd->associated) { 4086 sdata_unlock(sdata); 4087 return; 4088 } 4089 4090 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4091 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4092 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4093 ieee80211_sta_connection_lost(sdata, 4094 ifmgd->associated->bssid, 4095 WLAN_REASON_UNSPECIFIED, 4096 true); 4097 sdata_unlock(sdata); 4098 return; 4099 } 4100 sdata_unlock(sdata); 4101 } 4102 #endif 4103 4104 /* interface setup */ 4105 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4106 { 4107 struct ieee80211_if_managed *ifmgd; 4108 4109 ifmgd = &sdata->u.mgd; 4110 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4111 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4112 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4113 ieee80211_beacon_connection_loss_work); 4114 INIT_WORK(&ifmgd->csa_connection_drop_work, 4115 ieee80211_csa_connection_drop_work); 4116 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4117 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4118 ieee80211_tdls_peer_del_work); 4119 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4120 (unsigned long) sdata); 4121 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4122 (unsigned long) sdata); 4123 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4124 (unsigned long) sdata); 4125 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4126 (unsigned long) sdata); 4127 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4128 ieee80211_sta_handle_tspec_ac_params_wk); 4129 4130 ifmgd->flags = 0; 4131 ifmgd->powersave = sdata->wdev.ps; 4132 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4133 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4134 ifmgd->p2p_noa_index = -1; 4135 4136 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4137 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4138 else 4139 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4140 4141 /* Setup TDLS data */ 4142 spin_lock_init(&ifmgd->teardown_lock); 4143 ifmgd->teardown_skb = NULL; 4144 ifmgd->orig_teardown_skb = NULL; 4145 } 4146 4147 /* scan finished notification */ 4148 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4149 { 4150 struct ieee80211_sub_if_data *sdata; 4151 4152 /* Restart STA timers */ 4153 rcu_read_lock(); 4154 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4155 if (ieee80211_sdata_running(sdata)) 4156 ieee80211_restart_sta_timer(sdata); 4157 } 4158 rcu_read_unlock(); 4159 } 4160 4161 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4162 struct cfg80211_bss *cbss) 4163 { 4164 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4165 const u8 *ht_cap_ie, *vht_cap_ie; 4166 const struct ieee80211_ht_cap *ht_cap; 4167 const struct ieee80211_vht_cap *vht_cap; 4168 u8 chains = 1; 4169 4170 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4171 return chains; 4172 4173 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4174 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4175 ht_cap = (void *)(ht_cap_ie + 2); 4176 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4177 /* 4178 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4179 * "Tx Unequal Modulation Supported" fields. 4180 */ 4181 } 4182 4183 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4184 return chains; 4185 4186 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4187 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4188 u8 nss; 4189 u16 tx_mcs_map; 4190 4191 vht_cap = (void *)(vht_cap_ie + 2); 4192 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4193 for (nss = 8; nss > 0; nss--) { 4194 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4195 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4196 break; 4197 } 4198 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4199 chains = max(chains, nss); 4200 } 4201 4202 return chains; 4203 } 4204 4205 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4206 struct cfg80211_bss *cbss) 4207 { 4208 struct ieee80211_local *local = sdata->local; 4209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4210 const struct ieee80211_ht_cap *ht_cap = NULL; 4211 const struct ieee80211_ht_operation *ht_oper = NULL; 4212 const struct ieee80211_vht_operation *vht_oper = NULL; 4213 struct ieee80211_supported_band *sband; 4214 struct cfg80211_chan_def chandef; 4215 int ret; 4216 u32 i; 4217 bool have_80mhz; 4218 4219 sband = local->hw.wiphy->bands[cbss->channel->band]; 4220 4221 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4222 IEEE80211_STA_DISABLE_80P80MHZ | 4223 IEEE80211_STA_DISABLE_160MHZ); 4224 4225 rcu_read_lock(); 4226 4227 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4228 sband->ht_cap.ht_supported) { 4229 const u8 *ht_oper_ie, *ht_cap_ie; 4230 4231 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4232 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4233 ht_oper = (void *)(ht_oper_ie + 2); 4234 4235 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4236 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4237 ht_cap = (void *)(ht_cap_ie + 2); 4238 4239 if (!ht_cap) { 4240 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4241 ht_oper = NULL; 4242 } 4243 } 4244 4245 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4246 sband->vht_cap.vht_supported) { 4247 const u8 *vht_oper_ie, *vht_cap; 4248 4249 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4250 WLAN_EID_VHT_OPERATION); 4251 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4252 vht_oper = (void *)(vht_oper_ie + 2); 4253 if (vht_oper && !ht_oper) { 4254 vht_oper = NULL; 4255 sdata_info(sdata, 4256 "AP advertised VHT without HT, disabling both\n"); 4257 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4258 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4259 } 4260 4261 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4262 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4263 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4264 vht_oper = NULL; 4265 } 4266 } 4267 4268 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4269 have_80mhz = false; 4270 for (i = 0; i < sband->n_channels; i++) { 4271 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4272 IEEE80211_CHAN_NO_80MHZ)) 4273 continue; 4274 4275 have_80mhz = true; 4276 break; 4277 } 4278 4279 if (!have_80mhz) 4280 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4281 4282 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4283 cbss->channel, 4284 ht_cap, ht_oper, vht_oper, 4285 &chandef, false); 4286 4287 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4288 local->rx_chains); 4289 4290 rcu_read_unlock(); 4291 4292 /* will change later if needed */ 4293 sdata->smps_mode = IEEE80211_SMPS_OFF; 4294 4295 mutex_lock(&local->mtx); 4296 /* 4297 * If this fails (possibly due to channel context sharing 4298 * on incompatible channels, e.g. 80+80 and 160 sharing the 4299 * same control channel) try to use a smaller bandwidth. 4300 */ 4301 ret = ieee80211_vif_use_channel(sdata, &chandef, 4302 IEEE80211_CHANCTX_SHARED); 4303 4304 /* don't downgrade for 5 and 10 MHz channels, though. */ 4305 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4306 chandef.width == NL80211_CHAN_WIDTH_10) 4307 goto out; 4308 4309 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4310 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4311 ret = ieee80211_vif_use_channel(sdata, &chandef, 4312 IEEE80211_CHANCTX_SHARED); 4313 } 4314 out: 4315 mutex_unlock(&local->mtx); 4316 return ret; 4317 } 4318 4319 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4320 struct cfg80211_bss *cbss, bool assoc, 4321 bool override) 4322 { 4323 struct ieee80211_local *local = sdata->local; 4324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4325 struct ieee80211_bss *bss = (void *)cbss->priv; 4326 struct sta_info *new_sta = NULL; 4327 struct ieee80211_supported_band *sband; 4328 bool have_sta = false; 4329 int err; 4330 4331 sband = local->hw.wiphy->bands[cbss->channel->band]; 4332 4333 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4334 return -EINVAL; 4335 4336 if (assoc) { 4337 rcu_read_lock(); 4338 have_sta = sta_info_get(sdata, cbss->bssid); 4339 rcu_read_unlock(); 4340 } 4341 4342 if (!have_sta) { 4343 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4344 if (!new_sta) 4345 return -ENOMEM; 4346 } 4347 4348 if (new_sta || override) { 4349 err = ieee80211_prep_channel(sdata, cbss); 4350 if (err) { 4351 if (new_sta) 4352 sta_info_free(local, new_sta); 4353 return -EINVAL; 4354 } 4355 } 4356 4357 if (new_sta) { 4358 u32 rates = 0, basic_rates = 0; 4359 bool have_higher_than_11mbit; 4360 int min_rate = INT_MAX, min_rate_index = -1; 4361 struct ieee80211_chanctx_conf *chanctx_conf; 4362 const struct cfg80211_bss_ies *ies; 4363 int shift = ieee80211_vif_get_shift(&sdata->vif); 4364 u32 rate_flags; 4365 4366 rcu_read_lock(); 4367 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4368 if (WARN_ON(!chanctx_conf)) { 4369 rcu_read_unlock(); 4370 sta_info_free(local, new_sta); 4371 return -EINVAL; 4372 } 4373 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4374 rcu_read_unlock(); 4375 4376 ieee80211_get_rates(sband, bss->supp_rates, 4377 bss->supp_rates_len, 4378 &rates, &basic_rates, 4379 &have_higher_than_11mbit, 4380 &min_rate, &min_rate_index, 4381 shift, rate_flags); 4382 4383 /* 4384 * This used to be a workaround for basic rates missing 4385 * in the association response frame. Now that we no 4386 * longer use the basic rates from there, it probably 4387 * doesn't happen any more, but keep the workaround so 4388 * in case some *other* APs are buggy in different ways 4389 * we can connect -- with a warning. 4390 */ 4391 if (!basic_rates && min_rate_index >= 0) { 4392 sdata_info(sdata, 4393 "No basic rates, using min rate instead\n"); 4394 basic_rates = BIT(min_rate_index); 4395 } 4396 4397 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4398 sdata->vif.bss_conf.basic_rates = basic_rates; 4399 4400 /* cf. IEEE 802.11 9.2.12 */ 4401 if (cbss->channel->band == NL80211_BAND_2GHZ && 4402 have_higher_than_11mbit) 4403 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4404 else 4405 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4406 4407 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4408 4409 /* set timing information */ 4410 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4411 rcu_read_lock(); 4412 ies = rcu_dereference(cbss->beacon_ies); 4413 if (ies) { 4414 const u8 *tim_ie; 4415 4416 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4417 sdata->vif.bss_conf.sync_device_ts = 4418 bss->device_ts_beacon; 4419 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4420 ies->data, ies->len); 4421 if (tim_ie && tim_ie[1] >= 2) 4422 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4423 else 4424 sdata->vif.bss_conf.sync_dtim_count = 0; 4425 } else if (!ieee80211_hw_check(&sdata->local->hw, 4426 TIMING_BEACON_ONLY)) { 4427 ies = rcu_dereference(cbss->proberesp_ies); 4428 /* must be non-NULL since beacon IEs were NULL */ 4429 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4430 sdata->vif.bss_conf.sync_device_ts = 4431 bss->device_ts_presp; 4432 sdata->vif.bss_conf.sync_dtim_count = 0; 4433 } else { 4434 sdata->vif.bss_conf.sync_tsf = 0; 4435 sdata->vif.bss_conf.sync_device_ts = 0; 4436 sdata->vif.bss_conf.sync_dtim_count = 0; 4437 } 4438 rcu_read_unlock(); 4439 4440 /* tell driver about BSSID, basic rates and timing */ 4441 ieee80211_bss_info_change_notify(sdata, 4442 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4443 BSS_CHANGED_BEACON_INT); 4444 4445 if (assoc) 4446 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4447 4448 err = sta_info_insert(new_sta); 4449 new_sta = NULL; 4450 if (err) { 4451 sdata_info(sdata, 4452 "failed to insert STA entry for the AP (error %d)\n", 4453 err); 4454 return err; 4455 } 4456 } else 4457 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4458 4459 /* Cancel scan to ensure that nothing interferes with connection */ 4460 if (local->scanning) 4461 ieee80211_scan_cancel(local); 4462 4463 return 0; 4464 } 4465 4466 /* config hooks */ 4467 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4468 struct cfg80211_auth_request *req) 4469 { 4470 struct ieee80211_local *local = sdata->local; 4471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4472 struct ieee80211_mgd_auth_data *auth_data; 4473 u16 auth_alg; 4474 int err; 4475 4476 /* prepare auth data structure */ 4477 4478 switch (req->auth_type) { 4479 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4480 auth_alg = WLAN_AUTH_OPEN; 4481 break; 4482 case NL80211_AUTHTYPE_SHARED_KEY: 4483 if (IS_ERR(local->wep_tx_tfm)) 4484 return -EOPNOTSUPP; 4485 auth_alg = WLAN_AUTH_SHARED_KEY; 4486 break; 4487 case NL80211_AUTHTYPE_FT: 4488 auth_alg = WLAN_AUTH_FT; 4489 break; 4490 case NL80211_AUTHTYPE_NETWORK_EAP: 4491 auth_alg = WLAN_AUTH_LEAP; 4492 break; 4493 case NL80211_AUTHTYPE_SAE: 4494 auth_alg = WLAN_AUTH_SAE; 4495 break; 4496 case NL80211_AUTHTYPE_FILS_SK: 4497 auth_alg = WLAN_AUTH_FILS_SK; 4498 break; 4499 case NL80211_AUTHTYPE_FILS_SK_PFS: 4500 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4501 break; 4502 case NL80211_AUTHTYPE_FILS_PK: 4503 auth_alg = WLAN_AUTH_FILS_PK; 4504 break; 4505 default: 4506 return -EOPNOTSUPP; 4507 } 4508 4509 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4510 req->ie_len, GFP_KERNEL); 4511 if (!auth_data) 4512 return -ENOMEM; 4513 4514 auth_data->bss = req->bss; 4515 4516 if (req->auth_data_len >= 4) { 4517 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4518 __le16 *pos = (__le16 *) req->auth_data; 4519 4520 auth_data->sae_trans = le16_to_cpu(pos[0]); 4521 auth_data->sae_status = le16_to_cpu(pos[1]); 4522 } 4523 memcpy(auth_data->data, req->auth_data + 4, 4524 req->auth_data_len - 4); 4525 auth_data->data_len += req->auth_data_len - 4; 4526 } 4527 4528 if (req->ie && req->ie_len) { 4529 memcpy(&auth_data->data[auth_data->data_len], 4530 req->ie, req->ie_len); 4531 auth_data->data_len += req->ie_len; 4532 } 4533 4534 if (req->key && req->key_len) { 4535 auth_data->key_len = req->key_len; 4536 auth_data->key_idx = req->key_idx; 4537 memcpy(auth_data->key, req->key, req->key_len); 4538 } 4539 4540 auth_data->algorithm = auth_alg; 4541 4542 /* try to authenticate/probe */ 4543 4544 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4545 ifmgd->assoc_data) { 4546 err = -EBUSY; 4547 goto err_free; 4548 } 4549 4550 if (ifmgd->auth_data) 4551 ieee80211_destroy_auth_data(sdata, false); 4552 4553 /* prep auth_data so we don't go into idle on disassoc */ 4554 ifmgd->auth_data = auth_data; 4555 4556 if (ifmgd->associated) { 4557 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4558 4559 sdata_info(sdata, 4560 "disconnect from AP %pM for new auth to %pM\n", 4561 ifmgd->associated->bssid, req->bss->bssid); 4562 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4563 WLAN_REASON_UNSPECIFIED, 4564 false, frame_buf); 4565 4566 ieee80211_report_disconnect(sdata, frame_buf, 4567 sizeof(frame_buf), true, 4568 WLAN_REASON_UNSPECIFIED); 4569 } 4570 4571 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4572 4573 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4574 if (err) 4575 goto err_clear; 4576 4577 err = ieee80211_auth(sdata); 4578 if (err) { 4579 sta_info_destroy_addr(sdata, req->bss->bssid); 4580 goto err_clear; 4581 } 4582 4583 /* hold our own reference */ 4584 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4585 return 0; 4586 4587 err_clear: 4588 eth_zero_addr(ifmgd->bssid); 4589 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4590 ifmgd->auth_data = NULL; 4591 mutex_lock(&sdata->local->mtx); 4592 ieee80211_vif_release_channel(sdata); 4593 mutex_unlock(&sdata->local->mtx); 4594 err_free: 4595 kfree(auth_data); 4596 return err; 4597 } 4598 4599 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4600 struct cfg80211_assoc_request *req) 4601 { 4602 struct ieee80211_local *local = sdata->local; 4603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4604 struct ieee80211_bss *bss = (void *)req->bss->priv; 4605 struct ieee80211_mgd_assoc_data *assoc_data; 4606 const struct cfg80211_bss_ies *beacon_ies; 4607 struct ieee80211_supported_band *sband; 4608 const u8 *ssidie, *ht_ie, *vht_ie; 4609 int i, err; 4610 bool override = false; 4611 4612 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4613 if (!assoc_data) 4614 return -ENOMEM; 4615 4616 rcu_read_lock(); 4617 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4618 if (!ssidie) { 4619 rcu_read_unlock(); 4620 kfree(assoc_data); 4621 return -EINVAL; 4622 } 4623 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4624 assoc_data->ssid_len = ssidie[1]; 4625 rcu_read_unlock(); 4626 4627 if (ifmgd->associated) { 4628 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4629 4630 sdata_info(sdata, 4631 "disconnect from AP %pM for new assoc to %pM\n", 4632 ifmgd->associated->bssid, req->bss->bssid); 4633 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4634 WLAN_REASON_UNSPECIFIED, 4635 false, frame_buf); 4636 4637 ieee80211_report_disconnect(sdata, frame_buf, 4638 sizeof(frame_buf), true, 4639 WLAN_REASON_UNSPECIFIED); 4640 } 4641 4642 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4643 err = -EBUSY; 4644 goto err_free; 4645 } 4646 4647 if (ifmgd->assoc_data) { 4648 err = -EBUSY; 4649 goto err_free; 4650 } 4651 4652 if (ifmgd->auth_data) { 4653 bool match; 4654 4655 /* keep sta info, bssid if matching */ 4656 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4657 ieee80211_destroy_auth_data(sdata, match); 4658 } 4659 4660 /* prepare assoc data */ 4661 4662 ifmgd->beacon_crc_valid = false; 4663 4664 assoc_data->wmm = bss->wmm_used && 4665 (local->hw.queues >= IEEE80211_NUM_ACS); 4666 4667 /* 4668 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4669 * We still associate in non-HT mode (11a/b/g) if any one of these 4670 * ciphers is configured as pairwise. 4671 * We can set this to true for non-11n hardware, that'll be checked 4672 * separately along with the peer capabilities. 4673 */ 4674 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4675 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4676 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4677 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4678 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4679 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4680 netdev_info(sdata->dev, 4681 "disabling HT/VHT due to WEP/TKIP use\n"); 4682 } 4683 } 4684 4685 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4686 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4687 if (!sband->ht_cap.ht_supported || 4688 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4689 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4690 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4691 if (!bss->wmm_used && 4692 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4693 netdev_info(sdata->dev, 4694 "disabling HT as WMM/QoS is not supported by the AP\n"); 4695 } 4696 4697 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4698 if (!sband->vht_cap.vht_supported || 4699 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4700 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4701 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4702 if (!bss->wmm_used && 4703 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4704 netdev_info(sdata->dev, 4705 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4706 } 4707 4708 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4709 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4710 sizeof(ifmgd->ht_capa_mask)); 4711 4712 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4713 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4714 sizeof(ifmgd->vht_capa_mask)); 4715 4716 if (req->ie && req->ie_len) { 4717 memcpy(assoc_data->ie, req->ie, req->ie_len); 4718 assoc_data->ie_len = req->ie_len; 4719 } 4720 4721 if (req->fils_kek) { 4722 /* should already be checked in cfg80211 - so warn */ 4723 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4724 err = -EINVAL; 4725 goto err_free; 4726 } 4727 memcpy(assoc_data->fils_kek, req->fils_kek, 4728 req->fils_kek_len); 4729 assoc_data->fils_kek_len = req->fils_kek_len; 4730 } 4731 4732 if (req->fils_nonces) 4733 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4734 2 * FILS_NONCE_LEN); 4735 4736 assoc_data->bss = req->bss; 4737 4738 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4739 if (ifmgd->powersave) 4740 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4741 else 4742 sdata->smps_mode = IEEE80211_SMPS_OFF; 4743 } else 4744 sdata->smps_mode = ifmgd->req_smps; 4745 4746 assoc_data->capability = req->bss->capability; 4747 assoc_data->supp_rates = bss->supp_rates; 4748 assoc_data->supp_rates_len = bss->supp_rates_len; 4749 4750 rcu_read_lock(); 4751 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4752 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4753 assoc_data->ap_ht_param = 4754 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4755 else 4756 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4757 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4758 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4759 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4760 sizeof(struct ieee80211_vht_cap)); 4761 else 4762 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4763 rcu_read_unlock(); 4764 4765 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4766 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4767 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4768 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4769 4770 if (bss->wmm_used && bss->uapsd_supported && 4771 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4772 assoc_data->uapsd = true; 4773 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4774 } else { 4775 assoc_data->uapsd = false; 4776 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4777 } 4778 4779 if (req->prev_bssid) 4780 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4781 4782 if (req->use_mfp) { 4783 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4784 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4785 } else { 4786 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4787 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4788 } 4789 4790 if (req->flags & ASSOC_REQ_USE_RRM) 4791 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4792 else 4793 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4794 4795 if (req->crypto.control_port) 4796 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4797 else 4798 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4799 4800 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4801 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4802 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4803 sdata->vif.type); 4804 4805 /* kick off associate process */ 4806 4807 ifmgd->assoc_data = assoc_data; 4808 ifmgd->dtim_period = 0; 4809 ifmgd->have_beacon = false; 4810 4811 /* override HT/VHT configuration only if the AP and we support it */ 4812 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4813 struct ieee80211_sta_ht_cap sta_ht_cap; 4814 4815 if (req->flags & ASSOC_REQ_DISABLE_HT) 4816 override = true; 4817 4818 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4819 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4820 4821 /* check for 40 MHz disable override */ 4822 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4823 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4824 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4825 override = true; 4826 4827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4828 req->flags & ASSOC_REQ_DISABLE_VHT) 4829 override = true; 4830 } 4831 4832 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4833 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4834 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4835 } 4836 4837 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4839 4840 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4841 if (err) 4842 goto err_clear; 4843 4844 rcu_read_lock(); 4845 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4846 4847 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4848 !beacon_ies) { 4849 /* 4850 * Wait up to one beacon interval ... 4851 * should this be more if we miss one? 4852 */ 4853 sdata_info(sdata, "waiting for beacon from %pM\n", 4854 ifmgd->bssid); 4855 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4856 assoc_data->timeout_started = true; 4857 assoc_data->need_beacon = true; 4858 } else if (beacon_ies) { 4859 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4860 beacon_ies->data, 4861 beacon_ies->len); 4862 u8 dtim_count = 0; 4863 4864 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4865 const struct ieee80211_tim_ie *tim; 4866 tim = (void *)(tim_ie + 2); 4867 ifmgd->dtim_period = tim->dtim_period; 4868 dtim_count = tim->dtim_count; 4869 } 4870 ifmgd->have_beacon = true; 4871 assoc_data->timeout = jiffies; 4872 assoc_data->timeout_started = true; 4873 4874 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4875 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4876 sdata->vif.bss_conf.sync_device_ts = 4877 bss->device_ts_beacon; 4878 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4879 } 4880 } else { 4881 assoc_data->timeout = jiffies; 4882 assoc_data->timeout_started = true; 4883 } 4884 rcu_read_unlock(); 4885 4886 run_again(sdata, assoc_data->timeout); 4887 4888 if (bss->corrupt_data) { 4889 char *corrupt_type = "data"; 4890 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4891 if (bss->corrupt_data & 4892 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4893 corrupt_type = "beacon and probe response"; 4894 else 4895 corrupt_type = "beacon"; 4896 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4897 corrupt_type = "probe response"; 4898 sdata_info(sdata, "associating with AP with corrupt %s\n", 4899 corrupt_type); 4900 } 4901 4902 return 0; 4903 err_clear: 4904 eth_zero_addr(ifmgd->bssid); 4905 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4906 ifmgd->assoc_data = NULL; 4907 err_free: 4908 kfree(assoc_data); 4909 return err; 4910 } 4911 4912 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4913 struct cfg80211_deauth_request *req) 4914 { 4915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4916 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4917 bool tx = !req->local_state_change; 4918 4919 if (ifmgd->auth_data && 4920 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4921 sdata_info(sdata, 4922 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4923 req->bssid, req->reason_code, 4924 ieee80211_get_reason_code_string(req->reason_code)); 4925 4926 drv_mgd_prepare_tx(sdata->local, sdata); 4927 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4928 IEEE80211_STYPE_DEAUTH, 4929 req->reason_code, tx, 4930 frame_buf); 4931 ieee80211_destroy_auth_data(sdata, false); 4932 ieee80211_report_disconnect(sdata, frame_buf, 4933 sizeof(frame_buf), true, 4934 req->reason_code); 4935 4936 return 0; 4937 } 4938 4939 if (ifmgd->assoc_data && 4940 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4941 sdata_info(sdata, 4942 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4943 req->bssid, req->reason_code, 4944 ieee80211_get_reason_code_string(req->reason_code)); 4945 4946 drv_mgd_prepare_tx(sdata->local, sdata); 4947 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4948 IEEE80211_STYPE_DEAUTH, 4949 req->reason_code, tx, 4950 frame_buf); 4951 ieee80211_destroy_assoc_data(sdata, false, true); 4952 ieee80211_report_disconnect(sdata, frame_buf, 4953 sizeof(frame_buf), true, 4954 req->reason_code); 4955 return 0; 4956 } 4957 4958 if (ifmgd->associated && 4959 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4960 sdata_info(sdata, 4961 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4962 req->bssid, req->reason_code, 4963 ieee80211_get_reason_code_string(req->reason_code)); 4964 4965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4966 req->reason_code, tx, frame_buf); 4967 ieee80211_report_disconnect(sdata, frame_buf, 4968 sizeof(frame_buf), true, 4969 req->reason_code); 4970 return 0; 4971 } 4972 4973 return -ENOTCONN; 4974 } 4975 4976 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4977 struct cfg80211_disassoc_request *req) 4978 { 4979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4980 u8 bssid[ETH_ALEN]; 4981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4982 4983 /* 4984 * cfg80211 should catch this ... but it's racy since 4985 * we can receive a disassoc frame, process it, hand it 4986 * to cfg80211 while that's in a locked section already 4987 * trying to tell us that the user wants to disconnect. 4988 */ 4989 if (ifmgd->associated != req->bss) 4990 return -ENOLINK; 4991 4992 sdata_info(sdata, 4993 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4994 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4995 4996 memcpy(bssid, req->bss->bssid, ETH_ALEN); 4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 4998 req->reason_code, !req->local_state_change, 4999 frame_buf); 5000 5001 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5002 req->reason_code); 5003 5004 return 0; 5005 } 5006 5007 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5008 { 5009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5010 5011 /* 5012 * Make sure some work items will not run after this, 5013 * they will not do anything but might not have been 5014 * cancelled when disconnecting. 5015 */ 5016 cancel_work_sync(&ifmgd->monitor_work); 5017 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5018 cancel_work_sync(&ifmgd->request_smps_work); 5019 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5020 cancel_work_sync(&ifmgd->chswitch_work); 5021 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5022 5023 sdata_lock(sdata); 5024 if (ifmgd->assoc_data) { 5025 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5026 ieee80211_destroy_assoc_data(sdata, false, false); 5027 cfg80211_assoc_timeout(sdata->dev, bss); 5028 } 5029 if (ifmgd->auth_data) 5030 ieee80211_destroy_auth_data(sdata, false); 5031 spin_lock_bh(&ifmgd->teardown_lock); 5032 if (ifmgd->teardown_skb) { 5033 kfree_skb(ifmgd->teardown_skb); 5034 ifmgd->teardown_skb = NULL; 5035 ifmgd->orig_teardown_skb = NULL; 5036 } 5037 spin_unlock_bh(&ifmgd->teardown_lock); 5038 del_timer_sync(&ifmgd->timer); 5039 sdata_unlock(sdata); 5040 } 5041 5042 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5043 enum nl80211_cqm_rssi_threshold_event rssi_event, 5044 s32 rssi_level, 5045 gfp_t gfp) 5046 { 5047 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5048 5049 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5050 5051 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5052 } 5053 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5054 5055 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5056 { 5057 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5058 5059 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5060 5061 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5062 } 5063 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5064