1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2021 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 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 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 const struct ieee80211_s1g_oper_ie *s1g_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->freq1_offset = channel->freq_offset; 165 166 if (channel->band == NL80211_BAND_6GHZ) { 167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) 168 ret = IEEE80211_STA_DISABLE_HT | 169 IEEE80211_STA_DISABLE_VHT | 170 IEEE80211_STA_DISABLE_HE; 171 else 172 ret = 0; 173 vht_chandef = *chandef; 174 goto out; 175 } else if (sband->band == NL80211_BAND_S1GHZ) { 176 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 177 sdata_info(sdata, 178 "Missing S1G Operation Element? Trying operating == primary\n"); 179 chandef->width = ieee80211_s1g_channel_width(channel); 180 } 181 182 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 183 IEEE80211_STA_DISABLE_VHT | 184 IEEE80211_STA_DISABLE_80P80MHZ | 185 IEEE80211_STA_DISABLE_160MHZ; 186 goto out; 187 } 188 189 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 191 192 if (!ht_oper || !sta_ht_cap.ht_supported) { 193 ret = IEEE80211_STA_DISABLE_HT | 194 IEEE80211_STA_DISABLE_VHT | 195 IEEE80211_STA_DISABLE_HE; 196 goto out; 197 } 198 199 chandef->width = NL80211_CHAN_WIDTH_20; 200 201 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 202 channel->band); 203 /* check that channel matches the right operating channel */ 204 if (!tracking && channel->center_freq != ht_cfreq) { 205 /* 206 * It's possible that some APs are confused here; 207 * Netgear WNDR3700 sometimes reports 4 higher than 208 * the actual channel in association responses, but 209 * since we look at probe response/beacon data here 210 * it should be OK. 211 */ 212 sdata_info(sdata, 213 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 214 channel->center_freq, ht_cfreq, 215 ht_oper->primary_chan, channel->band); 216 ret = IEEE80211_STA_DISABLE_HT | 217 IEEE80211_STA_DISABLE_VHT | 218 IEEE80211_STA_DISABLE_HE; 219 goto out; 220 } 221 222 /* check 40 MHz support, if we have it */ 223 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 224 ieee80211_chandef_ht_oper(ht_oper, chandef); 225 } else { 226 /* 40 MHz (and 80 MHz) must be supported for VHT */ 227 ret = IEEE80211_STA_DISABLE_VHT; 228 /* also mark 40 MHz disabled */ 229 ret |= IEEE80211_STA_DISABLE_40MHZ; 230 goto out; 231 } 232 233 if (!vht_oper || !sband->vht_cap.vht_supported) { 234 ret = IEEE80211_STA_DISABLE_VHT; 235 goto out; 236 } 237 238 vht_chandef = *chandef; 239 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 240 (le32_to_cpu(he_oper->he_oper_params) & 241 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 242 struct ieee80211_vht_operation he_oper_vht_cap; 243 244 /* 245 * Set only first 3 bytes (other 2 aren't used in 246 * ieee80211_chandef_vht_oper() anyway) 247 */ 248 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 249 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 250 251 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 252 &he_oper_vht_cap, ht_oper, 253 &vht_chandef)) { 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 255 sdata_info(sdata, 256 "HE AP VHT information is invalid, disable HE\n"); 257 ret = IEEE80211_STA_DISABLE_HE; 258 goto out; 259 } 260 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 261 vht_cap_info, 262 vht_oper, ht_oper, 263 &vht_chandef)) { 264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 265 sdata_info(sdata, 266 "AP VHT information is invalid, disable VHT\n"); 267 ret = IEEE80211_STA_DISABLE_VHT; 268 goto out; 269 } 270 271 if (!cfg80211_chandef_valid(&vht_chandef)) { 272 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 273 sdata_info(sdata, 274 "AP VHT information is invalid, disable VHT\n"); 275 ret = IEEE80211_STA_DISABLE_VHT; 276 goto out; 277 } 278 279 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 280 ret = 0; 281 goto out; 282 } 283 284 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 285 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 286 sdata_info(sdata, 287 "AP VHT information doesn't match HT, disable VHT\n"); 288 ret = IEEE80211_STA_DISABLE_VHT; 289 goto out; 290 } 291 292 *chandef = vht_chandef; 293 294 ret = 0; 295 296 out: 297 /* 298 * When tracking the current AP, don't do any further checks if the 299 * new chandef is identical to the one we're currently using for the 300 * connection. This keeps us from playing ping-pong with regulatory, 301 * without it the following can happen (for example): 302 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 303 * - AP advertises regdom US 304 * - CRDA loads regdom US with 80 MHz prohibited (old database) 305 * - the code below detects an unsupported channel, downgrades, and 306 * we disconnect from the AP in the caller 307 * - disconnect causes CRDA to reload world regdomain and the game 308 * starts anew. 309 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 310 * 311 * It seems possible that there are still scenarios with CSA or real 312 * bandwidth changes where a this could happen, but those cases are 313 * less common and wouldn't completely prevent using the AP. 314 */ 315 if (tracking && 316 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 317 return ret; 318 319 /* don't print the message below for VHT mismatch if VHT is disabled */ 320 if (ret & IEEE80211_STA_DISABLE_VHT) 321 vht_chandef = *chandef; 322 323 /* 324 * Ignore the DISABLED flag when we're already connected and only 325 * tracking the APs beacon for bandwidth changes - otherwise we 326 * might get disconnected here if we connect to an AP, update our 327 * regulatory information based on the AP's country IE and the 328 * information we have is wrong/outdated and disables the channel 329 * that we're actually using for the connection to the AP. 330 */ 331 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 332 tracking ? 0 : 333 IEEE80211_CHAN_DISABLED)) { 334 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 335 ret = IEEE80211_STA_DISABLE_HT | 336 IEEE80211_STA_DISABLE_VHT | 337 IEEE80211_STA_DISABLE_HE; 338 break; 339 } 340 341 ret |= ieee80211_chandef_downgrade(chandef); 342 } 343 344 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 345 IEEE80211_CHAN_NO_HE)) 346 ret |= IEEE80211_STA_DISABLE_HE; 347 348 if (chandef->width != vht_chandef.width && !tracking) 349 sdata_info(sdata, 350 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 351 352 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 353 return ret; 354 } 355 356 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 357 struct sta_info *sta, 358 const struct ieee80211_ht_cap *ht_cap, 359 const struct ieee80211_vht_cap *vht_cap, 360 const struct ieee80211_ht_operation *ht_oper, 361 const struct ieee80211_vht_operation *vht_oper, 362 const struct ieee80211_he_operation *he_oper, 363 const struct ieee80211_s1g_oper_ie *s1g_oper, 364 const u8 *bssid, u32 *changed) 365 { 366 struct ieee80211_local *local = sdata->local; 367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 368 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 369 struct ieee80211_supported_band *sband = 370 local->hw.wiphy->bands[chan->band]; 371 struct cfg80211_chan_def chandef; 372 u16 ht_opmode; 373 u32 flags; 374 u32 vht_cap_info = 0; 375 int ret; 376 377 /* if HT was/is disabled, don't track any bandwidth changes */ 378 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 379 return 0; 380 381 /* don't check VHT if we associated as non-VHT station */ 382 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 383 vht_oper = NULL; 384 385 /* don't check HE if we associated as non-HE station */ 386 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 387 !ieee80211_get_he_iftype_cap(sband, 388 ieee80211_vif_type_p2p(&sdata->vif))) 389 390 he_oper = NULL; 391 392 if (WARN_ON_ONCE(!sta)) 393 return -EINVAL; 394 395 /* 396 * if bss configuration changed store the new one - 397 * this may be applicable even if channel is identical 398 */ 399 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 400 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 401 *changed |= BSS_CHANGED_HT; 402 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 403 } 404 405 if (vht_cap) 406 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 407 408 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 409 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 410 ht_oper, vht_oper, he_oper, 411 s1g_oper, &chandef, true); 412 413 /* 414 * Downgrade the new channel if we associated with restricted 415 * capabilities. For example, if we associated as a 20 MHz STA 416 * to a 40 MHz AP (due to regulatory, capabilities or config 417 * reasons) then switching to a 40 MHz channel now won't do us 418 * any good -- we couldn't use it with the AP. 419 */ 420 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 421 chandef.width == NL80211_CHAN_WIDTH_80P80) 422 flags |= ieee80211_chandef_downgrade(&chandef); 423 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 424 chandef.width == NL80211_CHAN_WIDTH_160) 425 flags |= ieee80211_chandef_downgrade(&chandef); 426 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 427 chandef.width > NL80211_CHAN_WIDTH_20) 428 flags |= ieee80211_chandef_downgrade(&chandef); 429 430 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 431 return 0; 432 433 sdata_info(sdata, 434 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 435 "width %d (%d.%03d/%d MHz)\n", 436 ifmgd->bssid, chandef.chan->center_freq, 437 chandef.chan->freq_offset, chandef.width, 438 chandef.center_freq1, chandef.freq1_offset, 439 chandef.center_freq2); 440 441 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 442 IEEE80211_STA_DISABLE_VHT | 443 IEEE80211_STA_DISABLE_HE | 444 IEEE80211_STA_DISABLE_40MHZ | 445 IEEE80211_STA_DISABLE_80P80MHZ | 446 IEEE80211_STA_DISABLE_160MHZ)) || 447 !cfg80211_chandef_valid(&chandef)) { 448 sdata_info(sdata, 449 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 450 ifmgd->bssid, flags, ifmgd->flags); 451 return -EINVAL; 452 } 453 454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 455 456 if (ret) { 457 sdata_info(sdata, 458 "AP %pM changed bandwidth to incompatible one - disconnect\n", 459 ifmgd->bssid); 460 return ret; 461 } 462 463 return 0; 464 } 465 466 /* frame sending functions */ 467 468 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 469 struct sk_buff *skb, u8 ap_ht_param, 470 struct ieee80211_supported_band *sband, 471 struct ieee80211_channel *channel, 472 enum ieee80211_smps_mode smps) 473 { 474 u8 *pos; 475 u32 flags = channel->flags; 476 u16 cap; 477 struct ieee80211_sta_ht_cap ht_cap; 478 479 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 480 481 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 482 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 483 484 /* determine capability flags */ 485 cap = ht_cap.cap; 486 487 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 488 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 489 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 490 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 491 cap &= ~IEEE80211_HT_CAP_SGI_40; 492 } 493 break; 494 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 495 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 496 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 497 cap &= ~IEEE80211_HT_CAP_SGI_40; 498 } 499 break; 500 } 501 502 /* 503 * If 40 MHz was disabled associate as though we weren't 504 * capable of 40 MHz -- some broken APs will never fall 505 * back to trying to transmit in 20 MHz. 506 */ 507 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 508 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 509 cap &= ~IEEE80211_HT_CAP_SGI_40; 510 } 511 512 /* set SM PS mode properly */ 513 cap &= ~IEEE80211_HT_CAP_SM_PS; 514 switch (smps) { 515 case IEEE80211_SMPS_AUTOMATIC: 516 case IEEE80211_SMPS_NUM_MODES: 517 WARN_ON(1); 518 fallthrough; 519 case IEEE80211_SMPS_OFF: 520 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 521 IEEE80211_HT_CAP_SM_PS_SHIFT; 522 break; 523 case IEEE80211_SMPS_STATIC: 524 cap |= WLAN_HT_CAP_SM_PS_STATIC << 525 IEEE80211_HT_CAP_SM_PS_SHIFT; 526 break; 527 case IEEE80211_SMPS_DYNAMIC: 528 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 529 IEEE80211_HT_CAP_SM_PS_SHIFT; 530 break; 531 } 532 533 /* reserve and fill IE */ 534 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 535 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 536 } 537 538 /* This function determines vht capability flags for the association 539 * and builds the IE. 540 * Note - the function may set the owner of the MU-MIMO capability 541 */ 542 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 543 struct sk_buff *skb, 544 struct ieee80211_supported_band *sband, 545 struct ieee80211_vht_cap *ap_vht_cap) 546 { 547 struct ieee80211_local *local = sdata->local; 548 u8 *pos; 549 u32 cap; 550 struct ieee80211_sta_vht_cap vht_cap; 551 u32 mask, ap_bf_sts, our_bf_sts; 552 553 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 554 555 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 556 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 557 558 /* determine capability flags */ 559 cap = vht_cap.cap; 560 561 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 562 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 563 564 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 565 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 566 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 567 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 568 } 569 570 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 571 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 572 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 573 } 574 575 /* 576 * Some APs apparently get confused if our capabilities are better 577 * than theirs, so restrict what we advertise in the assoc request. 578 */ 579 if (!(ap_vht_cap->vht_cap_info & 580 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 581 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 582 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 583 else if (!(ap_vht_cap->vht_cap_info & 584 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 585 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 586 587 /* 588 * If some other vif is using the MU-MIMO capability we cannot associate 589 * using MU-MIMO - this will lead to contradictions in the group-id 590 * mechanism. 591 * Ownership is defined since association request, in order to avoid 592 * simultaneous associations with MU-MIMO. 593 */ 594 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 595 bool disable_mu_mimo = false; 596 struct ieee80211_sub_if_data *other; 597 598 list_for_each_entry_rcu(other, &local->interfaces, list) { 599 if (other->vif.mu_mimo_owner) { 600 disable_mu_mimo = true; 601 break; 602 } 603 } 604 if (disable_mu_mimo) 605 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 606 else 607 sdata->vif.mu_mimo_owner = true; 608 } 609 610 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 611 612 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 613 our_bf_sts = cap & mask; 614 615 if (ap_bf_sts < our_bf_sts) { 616 cap &= ~mask; 617 cap |= ap_bf_sts; 618 } 619 620 /* reserve and fill IE */ 621 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 622 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 623 } 624 625 /* This function determines HE capability flags for the association 626 * and builds the IE. 627 */ 628 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 629 struct sk_buff *skb, 630 struct ieee80211_supported_band *sband) 631 { 632 u8 *pos; 633 const struct ieee80211_sta_he_cap *he_cap = NULL; 634 struct ieee80211_chanctx_conf *chanctx_conf; 635 u8 he_cap_size; 636 bool reg_cap = false; 637 638 rcu_read_lock(); 639 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 640 if (!WARN_ON_ONCE(!chanctx_conf)) 641 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 642 &chanctx_conf->def, 643 IEEE80211_CHAN_NO_HE); 644 645 rcu_read_unlock(); 646 647 he_cap = ieee80211_get_he_iftype_cap(sband, 648 ieee80211_vif_type_p2p(&sdata->vif)); 649 if (!he_cap || !reg_cap) 650 return; 651 652 /* 653 * TODO: the 1 added is because this temporarily is under the EXTENSION 654 * IE. Get rid of it when it moves. 655 */ 656 he_cap_size = 657 2 + 1 + sizeof(he_cap->he_cap_elem) + 658 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 659 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 660 he_cap->he_cap_elem.phy_cap_info); 661 pos = skb_put(skb, he_cap_size); 662 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 663 664 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 665 } 666 667 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 668 { 669 struct ieee80211_local *local = sdata->local; 670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 671 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 672 struct sk_buff *skb; 673 struct ieee80211_mgmt *mgmt; 674 u8 *pos, qos_info, *ie_start; 675 size_t offset = 0, noffset; 676 int i, count, rates_len, supp_rates_len, shift; 677 u16 capab; 678 struct ieee80211_supported_band *sband; 679 struct ieee80211_chanctx_conf *chanctx_conf; 680 struct ieee80211_channel *chan; 681 u32 rates = 0; 682 __le16 listen_int; 683 struct element *ext_capa = NULL; 684 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 685 const struct ieee80211_sband_iftype_data *iftd; 686 struct ieee80211_prep_tx_info info = {}; 687 688 /* we know it's writable, cast away the const */ 689 if (assoc_data->ie_len) 690 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 691 assoc_data->ie, 692 assoc_data->ie_len); 693 694 sdata_assert_lock(sdata); 695 696 rcu_read_lock(); 697 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 698 if (WARN_ON(!chanctx_conf)) { 699 rcu_read_unlock(); 700 return; 701 } 702 chan = chanctx_conf->def.chan; 703 rcu_read_unlock(); 704 sband = local->hw.wiphy->bands[chan->band]; 705 shift = ieee80211_vif_get_shift(&sdata->vif); 706 707 if (assoc_data->supp_rates_len) { 708 /* 709 * Get all rates supported by the device and the AP as 710 * some APs don't like getting a superset of their rates 711 * in the association request (e.g. D-Link DAP 1353 in 712 * b-only mode)... 713 */ 714 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 715 assoc_data->supp_rates, 716 assoc_data->supp_rates_len, 717 &rates); 718 } else { 719 /* 720 * In case AP not provide any supported rates information 721 * before association, we send information element(s) with 722 * all rates that we support. 723 */ 724 rates_len = 0; 725 for (i = 0; i < sband->n_bitrates; i++) { 726 rates |= BIT(i); 727 rates_len++; 728 } 729 } 730 731 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 732 733 skb = alloc_skb(local->hw.extra_tx_headroom + 734 sizeof(*mgmt) + /* bit too much but doesn't matter */ 735 2 + assoc_data->ssid_len + /* SSID */ 736 4 + rates_len + /* (extended) rates */ 737 4 + /* power capability */ 738 2 + 2 * sband->n_channels + /* supported channels */ 739 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 740 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 741 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 742 sizeof(struct ieee80211_he_mcs_nss_supp) + 743 IEEE80211_HE_PPE_THRES_MAX_LEN + 744 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 745 assoc_data->ie_len + /* extra IEs */ 746 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 747 9 + /* WMM */ 748 (iftd ? iftd->vendor_elems.len : 0), 749 GFP_KERNEL); 750 if (!skb) 751 return; 752 753 skb_reserve(skb, local->hw.extra_tx_headroom); 754 755 capab = WLAN_CAPABILITY_ESS; 756 757 if (sband->band == NL80211_BAND_2GHZ) { 758 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 759 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 760 } 761 762 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 763 capab |= WLAN_CAPABILITY_PRIVACY; 764 765 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 766 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 767 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 768 769 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 770 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 771 772 mgmt = skb_put_zero(skb, 24); 773 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 774 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 775 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 776 777 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 778 ieee80211_encode_usf(local->hw.conf.listen_interval) : 779 local->hw.conf.listen_interval); 780 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 781 skb_put(skb, 10); 782 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 783 IEEE80211_STYPE_REASSOC_REQ); 784 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 785 mgmt->u.reassoc_req.listen_interval = listen_int; 786 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 787 ETH_ALEN); 788 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 789 } else { 790 skb_put(skb, 4); 791 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 792 IEEE80211_STYPE_ASSOC_REQ); 793 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 794 mgmt->u.assoc_req.listen_interval = listen_int; 795 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 796 } 797 798 /* SSID */ 799 pos = skb_put(skb, 2 + assoc_data->ssid_len); 800 ie_start = pos; 801 *pos++ = WLAN_EID_SSID; 802 *pos++ = assoc_data->ssid_len; 803 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 804 805 if (sband->band == NL80211_BAND_S1GHZ) 806 goto skip_rates; 807 808 /* add all rates which were marked to be used above */ 809 supp_rates_len = rates_len; 810 if (supp_rates_len > 8) 811 supp_rates_len = 8; 812 813 pos = skb_put(skb, supp_rates_len + 2); 814 *pos++ = WLAN_EID_SUPP_RATES; 815 *pos++ = supp_rates_len; 816 817 count = 0; 818 for (i = 0; i < sband->n_bitrates; i++) { 819 if (BIT(i) & rates) { 820 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 821 5 * (1 << shift)); 822 *pos++ = (u8) rate; 823 if (++count == 8) 824 break; 825 } 826 } 827 828 if (rates_len > count) { 829 pos = skb_put(skb, rates_len - count + 2); 830 *pos++ = WLAN_EID_EXT_SUPP_RATES; 831 *pos++ = rates_len - count; 832 833 for (i++; i < sband->n_bitrates; i++) { 834 if (BIT(i) & rates) { 835 int rate; 836 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 837 5 * (1 << shift)); 838 *pos++ = (u8) rate; 839 } 840 } 841 } 842 843 skip_rates: 844 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 845 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 846 pos = skb_put(skb, 4); 847 *pos++ = WLAN_EID_PWR_CAPABILITY; 848 *pos++ = 2; 849 *pos++ = 0; /* min tx power */ 850 /* max tx power */ 851 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 852 } 853 854 /* 855 * Per spec, we shouldn't include the list of channels if we advertise 856 * support for extended channel switching, but we've always done that; 857 * (for now?) apply this restriction only on the (new) 6 GHz band. 858 */ 859 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 860 (sband->band != NL80211_BAND_6GHZ || 861 !ext_capa || ext_capa->datalen < 1 || 862 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 863 /* TODO: get this in reg domain format */ 864 pos = skb_put(skb, 2 * sband->n_channels + 2); 865 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 866 *pos++ = 2 * sband->n_channels; 867 for (i = 0; i < sband->n_channels; i++) { 868 *pos++ = ieee80211_frequency_to_channel( 869 sband->channels[i].center_freq); 870 *pos++ = 1; /* one channel in the subband*/ 871 } 872 } 873 874 /* Set MBSSID support for HE AP if needed */ 875 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 876 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 877 ext_capa && ext_capa->datalen >= 3) 878 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 879 880 /* if present, add any custom IEs that go before HT */ 881 if (assoc_data->ie_len) { 882 static const u8 before_ht[] = { 883 WLAN_EID_SSID, 884 WLAN_EID_SUPP_RATES, 885 WLAN_EID_EXT_SUPP_RATES, 886 WLAN_EID_PWR_CAPABILITY, 887 WLAN_EID_SUPPORTED_CHANNELS, 888 WLAN_EID_RSN, 889 WLAN_EID_QOS_CAPA, 890 WLAN_EID_RRM_ENABLED_CAPABILITIES, 891 WLAN_EID_MOBILITY_DOMAIN, 892 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 893 WLAN_EID_RIC_DATA, /* reassoc only */ 894 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 895 }; 896 static const u8 after_ric[] = { 897 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 898 WLAN_EID_HT_CAPABILITY, 899 WLAN_EID_BSS_COEX_2040, 900 /* luckily this is almost always there */ 901 WLAN_EID_EXT_CAPABILITY, 902 WLAN_EID_QOS_TRAFFIC_CAPA, 903 WLAN_EID_TIM_BCAST_REQ, 904 WLAN_EID_INTERWORKING, 905 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 906 WLAN_EID_VHT_CAPABILITY, 907 WLAN_EID_OPMODE_NOTIF, 908 }; 909 910 noffset = ieee80211_ie_split_ric(assoc_data->ie, 911 assoc_data->ie_len, 912 before_ht, 913 ARRAY_SIZE(before_ht), 914 after_ric, 915 ARRAY_SIZE(after_ric), 916 offset); 917 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 918 offset = noffset; 919 } 920 921 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 922 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 923 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 924 925 if (sband->band != NL80211_BAND_6GHZ && 926 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 927 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 928 sband, chan, sdata->smps_mode); 929 930 /* if present, add any custom IEs that go before VHT */ 931 if (assoc_data->ie_len) { 932 static const u8 before_vht[] = { 933 /* 934 * no need to list the ones split off before HT 935 * or generated here 936 */ 937 WLAN_EID_BSS_COEX_2040, 938 WLAN_EID_EXT_CAPABILITY, 939 WLAN_EID_QOS_TRAFFIC_CAPA, 940 WLAN_EID_TIM_BCAST_REQ, 941 WLAN_EID_INTERWORKING, 942 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 943 }; 944 945 /* RIC already taken above, so no need to handle here anymore */ 946 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 947 before_vht, ARRAY_SIZE(before_vht), 948 offset); 949 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 950 offset = noffset; 951 } 952 953 /* if present, add any custom IEs that go before HE */ 954 if (assoc_data->ie_len) { 955 static const u8 before_he[] = { 956 /* 957 * no need to list the ones split off before VHT 958 * or generated here 959 */ 960 WLAN_EID_OPMODE_NOTIF, 961 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 962 /* 11ai elements */ 963 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 964 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 965 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 966 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 967 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 968 /* TODO: add 11ah/11aj/11ak elements */ 969 }; 970 971 /* RIC already taken above, so no need to handle here anymore */ 972 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 973 before_he, ARRAY_SIZE(before_he), 974 offset); 975 pos = skb_put(skb, noffset - offset); 976 memcpy(pos, assoc_data->ie + offset, noffset - offset); 977 offset = noffset; 978 } 979 980 if (sband->band != NL80211_BAND_6GHZ && 981 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 982 ieee80211_add_vht_ie(sdata, skb, sband, 983 &assoc_data->ap_vht_cap); 984 985 /* 986 * If AP doesn't support HT, mark HE as disabled. 987 * If on the 5GHz band, make sure it supports VHT. 988 */ 989 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 990 (sband->band == NL80211_BAND_5GHZ && 991 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 992 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 993 994 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 995 ieee80211_add_he_ie(sdata, skb, sband); 996 997 /* if present, add any custom non-vendor IEs that go after HE */ 998 if (assoc_data->ie_len) { 999 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1000 assoc_data->ie_len, 1001 offset); 1002 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1003 offset = noffset; 1004 } 1005 1006 if (assoc_data->wmm) { 1007 if (assoc_data->uapsd) { 1008 qos_info = ifmgd->uapsd_queues; 1009 qos_info |= (ifmgd->uapsd_max_sp_len << 1010 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1011 } else { 1012 qos_info = 0; 1013 } 1014 1015 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1016 } 1017 1018 if (sband->band == NL80211_BAND_S1GHZ) { 1019 ieee80211_add_aid_request_ie(sdata, skb); 1020 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1021 } 1022 1023 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1024 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1025 1026 /* add any remaining custom (i.e. vendor specific here) IEs */ 1027 if (assoc_data->ie_len) { 1028 noffset = assoc_data->ie_len; 1029 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1030 } 1031 1032 if (assoc_data->fils_kek_len && 1033 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1034 dev_kfree_skb(skb); 1035 return; 1036 } 1037 1038 pos = skb_tail_pointer(skb); 1039 kfree(ifmgd->assoc_req_ies); 1040 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1041 ifmgd->assoc_req_ies_len = pos - ie_start; 1042 1043 drv_mgd_prepare_tx(local, sdata, &info); 1044 1045 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1046 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1047 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1048 IEEE80211_TX_INTFL_MLME_CONN_TX; 1049 ieee80211_tx_skb(sdata, skb); 1050 } 1051 1052 void ieee80211_send_pspoll(struct ieee80211_local *local, 1053 struct ieee80211_sub_if_data *sdata) 1054 { 1055 struct ieee80211_pspoll *pspoll; 1056 struct sk_buff *skb; 1057 1058 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1059 if (!skb) 1060 return; 1061 1062 pspoll = (struct ieee80211_pspoll *) skb->data; 1063 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1064 1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1066 ieee80211_tx_skb(sdata, skb); 1067 } 1068 1069 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1070 struct ieee80211_sub_if_data *sdata, 1071 bool powersave) 1072 { 1073 struct sk_buff *skb; 1074 struct ieee80211_hdr_3addr *nullfunc; 1075 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1076 1077 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1078 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1079 if (!skb) 1080 return; 1081 1082 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1083 if (powersave) 1084 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1085 1086 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1087 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1088 1089 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1090 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1091 1092 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1093 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1094 1095 ieee80211_tx_skb(sdata, skb); 1096 } 1097 1098 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1099 struct ieee80211_sub_if_data *sdata) 1100 { 1101 struct sk_buff *skb; 1102 struct ieee80211_hdr *nullfunc; 1103 __le16 fc; 1104 1105 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1106 return; 1107 1108 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1109 if (!skb) 1110 return; 1111 1112 skb_reserve(skb, local->hw.extra_tx_headroom); 1113 1114 nullfunc = skb_put_zero(skb, 30); 1115 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1116 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1117 nullfunc->frame_control = fc; 1118 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1119 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1120 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1121 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1122 1123 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1124 ieee80211_tx_skb(sdata, skb); 1125 } 1126 1127 /* spectrum management related things */ 1128 static void ieee80211_chswitch_work(struct work_struct *work) 1129 { 1130 struct ieee80211_sub_if_data *sdata = 1131 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1132 struct ieee80211_local *local = sdata->local; 1133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1134 int ret; 1135 1136 if (!ieee80211_sdata_running(sdata)) 1137 return; 1138 1139 sdata_lock(sdata); 1140 mutex_lock(&local->mtx); 1141 mutex_lock(&local->chanctx_mtx); 1142 1143 if (!ifmgd->associated) 1144 goto out; 1145 1146 if (!sdata->vif.csa_active) 1147 goto out; 1148 1149 /* 1150 * using reservation isn't immediate as it may be deferred until later 1151 * with multi-vif. once reservation is complete it will re-schedule the 1152 * work with no reserved_chanctx so verify chandef to check if it 1153 * completed successfully 1154 */ 1155 1156 if (sdata->reserved_chanctx) { 1157 /* 1158 * with multi-vif csa driver may call ieee80211_csa_finish() 1159 * many times while waiting for other interfaces to use their 1160 * reservations 1161 */ 1162 if (sdata->reserved_ready) 1163 goto out; 1164 1165 ret = ieee80211_vif_use_reserved_context(sdata); 1166 if (ret) { 1167 sdata_info(sdata, 1168 "failed to use reserved channel context, disconnecting (err=%d)\n", 1169 ret); 1170 ieee80211_queue_work(&sdata->local->hw, 1171 &ifmgd->csa_connection_drop_work); 1172 goto out; 1173 } 1174 1175 goto out; 1176 } 1177 1178 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1179 &sdata->csa_chandef)) { 1180 sdata_info(sdata, 1181 "failed to finalize channel switch, disconnecting\n"); 1182 ieee80211_queue_work(&sdata->local->hw, 1183 &ifmgd->csa_connection_drop_work); 1184 goto out; 1185 } 1186 1187 ifmgd->csa_waiting_bcn = true; 1188 1189 ieee80211_sta_reset_beacon_monitor(sdata); 1190 ieee80211_sta_reset_conn_monitor(sdata); 1191 1192 out: 1193 mutex_unlock(&local->chanctx_mtx); 1194 mutex_unlock(&local->mtx); 1195 sdata_unlock(sdata); 1196 } 1197 1198 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1199 { 1200 struct ieee80211_local *local = sdata->local; 1201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1202 int ret; 1203 1204 sdata_assert_lock(sdata); 1205 1206 WARN_ON(!sdata->vif.csa_active); 1207 1208 if (sdata->csa_block_tx) { 1209 ieee80211_wake_vif_queues(local, sdata, 1210 IEEE80211_QUEUE_STOP_REASON_CSA); 1211 sdata->csa_block_tx = false; 1212 } 1213 1214 sdata->vif.csa_active = false; 1215 ifmgd->csa_waiting_bcn = false; 1216 /* 1217 * If the CSA IE is still present on the beacon after the switch, 1218 * we need to consider it as a new CSA (possibly to self). 1219 */ 1220 ifmgd->beacon_crc_valid = false; 1221 1222 ret = drv_post_channel_switch(sdata); 1223 if (ret) { 1224 sdata_info(sdata, 1225 "driver post channel switch failed, disconnecting\n"); 1226 ieee80211_queue_work(&local->hw, 1227 &ifmgd->csa_connection_drop_work); 1228 return; 1229 } 1230 1231 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1232 } 1233 1234 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1235 { 1236 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1238 1239 trace_api_chswitch_done(sdata, success); 1240 if (!success) { 1241 sdata_info(sdata, 1242 "driver channel switch failed, disconnecting\n"); 1243 ieee80211_queue_work(&sdata->local->hw, 1244 &ifmgd->csa_connection_drop_work); 1245 } else { 1246 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1247 } 1248 } 1249 EXPORT_SYMBOL(ieee80211_chswitch_done); 1250 1251 static void ieee80211_chswitch_timer(struct timer_list *t) 1252 { 1253 struct ieee80211_sub_if_data *sdata = 1254 from_timer(sdata, t, u.mgd.chswitch_timer); 1255 1256 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1257 } 1258 1259 static void 1260 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1261 { 1262 struct ieee80211_local *local = sdata->local; 1263 1264 if (!local->ops->abort_channel_switch) 1265 return; 1266 1267 mutex_lock(&local->mtx); 1268 1269 mutex_lock(&local->chanctx_mtx); 1270 ieee80211_vif_unreserve_chanctx(sdata); 1271 mutex_unlock(&local->chanctx_mtx); 1272 1273 if (sdata->csa_block_tx) 1274 ieee80211_wake_vif_queues(local, sdata, 1275 IEEE80211_QUEUE_STOP_REASON_CSA); 1276 1277 sdata->csa_block_tx = false; 1278 sdata->vif.csa_active = false; 1279 1280 mutex_unlock(&local->mtx); 1281 1282 drv_abort_channel_switch(sdata); 1283 } 1284 1285 static void 1286 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1287 u64 timestamp, u32 device_timestamp, 1288 struct ieee802_11_elems *elems, 1289 bool beacon) 1290 { 1291 struct ieee80211_local *local = sdata->local; 1292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1293 struct cfg80211_bss *cbss = ifmgd->associated; 1294 struct ieee80211_chanctx_conf *conf; 1295 struct ieee80211_chanctx *chanctx; 1296 enum nl80211_band current_band; 1297 struct ieee80211_csa_ie csa_ie; 1298 struct ieee80211_channel_switch ch_switch; 1299 struct ieee80211_bss *bss; 1300 int res; 1301 1302 sdata_assert_lock(sdata); 1303 1304 if (!cbss) 1305 return; 1306 1307 if (local->scanning) 1308 return; 1309 1310 current_band = cbss->channel->band; 1311 bss = (void *)cbss->priv; 1312 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1313 bss->vht_cap_info, 1314 ifmgd->flags, 1315 ifmgd->associated->bssid, &csa_ie); 1316 1317 if (!res) { 1318 ch_switch.timestamp = timestamp; 1319 ch_switch.device_timestamp = device_timestamp; 1320 ch_switch.block_tx = csa_ie.mode; 1321 ch_switch.chandef = csa_ie.chandef; 1322 ch_switch.count = csa_ie.count; 1323 ch_switch.delay = csa_ie.max_switch_time; 1324 } 1325 1326 if (res < 0) 1327 goto lock_and_drop_connection; 1328 1329 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1330 if (res) 1331 ieee80211_sta_abort_chanswitch(sdata); 1332 else 1333 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1334 return; 1335 } else if (sdata->vif.csa_active || res) { 1336 /* disregard subsequent announcements if already processing */ 1337 return; 1338 } 1339 1340 if (sdata->vif.bss_conf.chandef.chan->band != 1341 csa_ie.chandef.chan->band) { 1342 sdata_info(sdata, 1343 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1344 ifmgd->associated->bssid, 1345 csa_ie.chandef.chan->center_freq, 1346 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1347 csa_ie.chandef.center_freq2); 1348 goto lock_and_drop_connection; 1349 } 1350 1351 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1352 IEEE80211_CHAN_DISABLED)) { 1353 sdata_info(sdata, 1354 "AP %pM switches to unsupported channel " 1355 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1356 "disconnecting\n", 1357 ifmgd->associated->bssid, 1358 csa_ie.chandef.chan->center_freq, 1359 csa_ie.chandef.chan->freq_offset, 1360 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1361 csa_ie.chandef.freq1_offset, 1362 csa_ie.chandef.center_freq2); 1363 goto lock_and_drop_connection; 1364 } 1365 1366 if (cfg80211_chandef_identical(&csa_ie.chandef, 1367 &sdata->vif.bss_conf.chandef) && 1368 (!csa_ie.mode || !beacon)) { 1369 if (ifmgd->csa_ignored_same_chan) 1370 return; 1371 sdata_info(sdata, 1372 "AP %pM tries to chanswitch to same channel, ignore\n", 1373 ifmgd->associated->bssid); 1374 ifmgd->csa_ignored_same_chan = true; 1375 return; 1376 } 1377 1378 /* 1379 * Drop all TDLS peers - either we disconnect or move to a different 1380 * channel from this point on. There's no telling what our peer will do. 1381 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1382 * have an incompatible wider chandef. 1383 */ 1384 ieee80211_teardown_tdls_peers(sdata); 1385 1386 mutex_lock(&local->mtx); 1387 mutex_lock(&local->chanctx_mtx); 1388 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1389 lockdep_is_held(&local->chanctx_mtx)); 1390 if (!conf) { 1391 sdata_info(sdata, 1392 "no channel context assigned to vif?, disconnecting\n"); 1393 goto drop_connection; 1394 } 1395 1396 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1397 1398 if (local->use_chanctx && 1399 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1400 sdata_info(sdata, 1401 "driver doesn't support chan-switch with channel contexts\n"); 1402 goto drop_connection; 1403 } 1404 1405 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1406 sdata_info(sdata, 1407 "preparing for channel switch failed, disconnecting\n"); 1408 goto drop_connection; 1409 } 1410 1411 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1412 chanctx->mode, false); 1413 if (res) { 1414 sdata_info(sdata, 1415 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1416 res); 1417 goto drop_connection; 1418 } 1419 mutex_unlock(&local->chanctx_mtx); 1420 1421 sdata->vif.csa_active = true; 1422 sdata->csa_chandef = csa_ie.chandef; 1423 sdata->csa_block_tx = csa_ie.mode; 1424 ifmgd->csa_ignored_same_chan = false; 1425 ifmgd->beacon_crc_valid = false; 1426 1427 if (sdata->csa_block_tx) 1428 ieee80211_stop_vif_queues(local, sdata, 1429 IEEE80211_QUEUE_STOP_REASON_CSA); 1430 mutex_unlock(&local->mtx); 1431 1432 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1433 csa_ie.count, csa_ie.mode); 1434 1435 if (local->ops->channel_switch) { 1436 /* use driver's channel switch callback */ 1437 drv_channel_switch(local, sdata, &ch_switch); 1438 return; 1439 } 1440 1441 /* channel switch handled in software */ 1442 if (csa_ie.count <= 1) 1443 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1444 else 1445 mod_timer(&ifmgd->chswitch_timer, 1446 TU_TO_EXP_TIME((csa_ie.count - 1) * 1447 cbss->beacon_interval)); 1448 return; 1449 lock_and_drop_connection: 1450 mutex_lock(&local->mtx); 1451 mutex_lock(&local->chanctx_mtx); 1452 drop_connection: 1453 /* 1454 * This is just so that the disconnect flow will know that 1455 * we were trying to switch channel and failed. In case the 1456 * mode is 1 (we are not allowed to Tx), we will know not to 1457 * send a deauthentication frame. Those two fields will be 1458 * reset when the disconnection worker runs. 1459 */ 1460 sdata->vif.csa_active = true; 1461 sdata->csa_block_tx = csa_ie.mode; 1462 1463 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1464 mutex_unlock(&local->chanctx_mtx); 1465 mutex_unlock(&local->mtx); 1466 } 1467 1468 static bool 1469 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1470 struct ieee80211_channel *channel, 1471 const u8 *country_ie, u8 country_ie_len, 1472 const u8 *pwr_constr_elem, 1473 int *chan_pwr, int *pwr_reduction) 1474 { 1475 struct ieee80211_country_ie_triplet *triplet; 1476 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1477 int i, chan_increment; 1478 bool have_chan_pwr = false; 1479 1480 /* Invalid IE */ 1481 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1482 return false; 1483 1484 triplet = (void *)(country_ie + 3); 1485 country_ie_len -= 3; 1486 1487 switch (channel->band) { 1488 default: 1489 WARN_ON_ONCE(1); 1490 fallthrough; 1491 case NL80211_BAND_2GHZ: 1492 case NL80211_BAND_60GHZ: 1493 case NL80211_BAND_LC: 1494 chan_increment = 1; 1495 break; 1496 case NL80211_BAND_5GHZ: 1497 chan_increment = 4; 1498 break; 1499 case NL80211_BAND_6GHZ: 1500 /* 1501 * In the 6 GHz band, the "maximum transmit power level" 1502 * field in the triplets is reserved, and thus will be 1503 * zero and we shouldn't use it to control TX power. 1504 * The actual TX power will be given in the transmit 1505 * power envelope element instead. 1506 */ 1507 return false; 1508 } 1509 1510 /* find channel */ 1511 while (country_ie_len >= 3) { 1512 u8 first_channel = triplet->chans.first_channel; 1513 1514 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1515 goto next; 1516 1517 for (i = 0; i < triplet->chans.num_channels; i++) { 1518 if (first_channel + i * chan_increment == chan) { 1519 have_chan_pwr = true; 1520 *chan_pwr = triplet->chans.max_power; 1521 break; 1522 } 1523 } 1524 if (have_chan_pwr) 1525 break; 1526 1527 next: 1528 triplet++; 1529 country_ie_len -= 3; 1530 } 1531 1532 if (have_chan_pwr && pwr_constr_elem) 1533 *pwr_reduction = *pwr_constr_elem; 1534 else 1535 *pwr_reduction = 0; 1536 1537 return have_chan_pwr; 1538 } 1539 1540 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1541 struct ieee80211_channel *channel, 1542 const u8 *cisco_dtpc_ie, 1543 int *pwr_level) 1544 { 1545 /* From practical testing, the first data byte of the DTPC element 1546 * seems to contain the requested dBm level, and the CLI on Cisco 1547 * APs clearly state the range is -127 to 127 dBm, which indicates 1548 * a signed byte, although it seemingly never actually goes negative. 1549 * The other byte seems to always be zero. 1550 */ 1551 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1552 } 1553 1554 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1555 struct ieee80211_channel *channel, 1556 struct ieee80211_mgmt *mgmt, 1557 const u8 *country_ie, u8 country_ie_len, 1558 const u8 *pwr_constr_ie, 1559 const u8 *cisco_dtpc_ie) 1560 { 1561 bool has_80211h_pwr = false, has_cisco_pwr = false; 1562 int chan_pwr = 0, pwr_reduction_80211h = 0; 1563 int pwr_level_cisco, pwr_level_80211h; 1564 int new_ap_level; 1565 __le16 capab = mgmt->u.probe_resp.capab_info; 1566 1567 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1568 return 0; /* TODO */ 1569 1570 if (country_ie && 1571 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1572 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1573 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1574 sdata, channel, country_ie, country_ie_len, 1575 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1576 pwr_level_80211h = 1577 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1578 } 1579 1580 if (cisco_dtpc_ie) { 1581 ieee80211_find_cisco_dtpc( 1582 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1583 has_cisco_pwr = true; 1584 } 1585 1586 if (!has_80211h_pwr && !has_cisco_pwr) 1587 return 0; 1588 1589 /* If we have both 802.11h and Cisco DTPC, apply both limits 1590 * by picking the smallest of the two power levels advertised. 1591 */ 1592 if (has_80211h_pwr && 1593 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1594 new_ap_level = pwr_level_80211h; 1595 1596 if (sdata->ap_power_level == new_ap_level) 1597 return 0; 1598 1599 sdata_dbg(sdata, 1600 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1601 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1602 sdata->u.mgd.bssid); 1603 } else { /* has_cisco_pwr is always true here. */ 1604 new_ap_level = pwr_level_cisco; 1605 1606 if (sdata->ap_power_level == new_ap_level) 1607 return 0; 1608 1609 sdata_dbg(sdata, 1610 "Limiting TX power to %d dBm as advertised by %pM\n", 1611 pwr_level_cisco, sdata->u.mgd.bssid); 1612 } 1613 1614 sdata->ap_power_level = new_ap_level; 1615 if (__ieee80211_recalc_txpower(sdata)) 1616 return BSS_CHANGED_TXPOWER; 1617 return 0; 1618 } 1619 1620 /* powersave */ 1621 static void ieee80211_enable_ps(struct ieee80211_local *local, 1622 struct ieee80211_sub_if_data *sdata) 1623 { 1624 struct ieee80211_conf *conf = &local->hw.conf; 1625 1626 /* 1627 * If we are scanning right now then the parameters will 1628 * take effect when scan finishes. 1629 */ 1630 if (local->scanning) 1631 return; 1632 1633 if (conf->dynamic_ps_timeout > 0 && 1634 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1635 mod_timer(&local->dynamic_ps_timer, jiffies + 1636 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1637 } else { 1638 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1639 ieee80211_send_nullfunc(local, sdata, true); 1640 1641 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1642 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1643 return; 1644 1645 conf->flags |= IEEE80211_CONF_PS; 1646 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1647 } 1648 } 1649 1650 static void ieee80211_change_ps(struct ieee80211_local *local) 1651 { 1652 struct ieee80211_conf *conf = &local->hw.conf; 1653 1654 if (local->ps_sdata) { 1655 ieee80211_enable_ps(local, local->ps_sdata); 1656 } else if (conf->flags & IEEE80211_CONF_PS) { 1657 conf->flags &= ~IEEE80211_CONF_PS; 1658 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1659 del_timer_sync(&local->dynamic_ps_timer); 1660 cancel_work_sync(&local->dynamic_ps_enable_work); 1661 } 1662 } 1663 1664 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1665 { 1666 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1667 struct sta_info *sta = NULL; 1668 bool authorized = false; 1669 1670 if (!mgd->powersave) 1671 return false; 1672 1673 if (mgd->broken_ap) 1674 return false; 1675 1676 if (!mgd->associated) 1677 return false; 1678 1679 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1680 return false; 1681 1682 if (!mgd->have_beacon) 1683 return false; 1684 1685 rcu_read_lock(); 1686 sta = sta_info_get(sdata, mgd->bssid); 1687 if (sta) 1688 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1689 rcu_read_unlock(); 1690 1691 return authorized; 1692 } 1693 1694 /* need to hold RTNL or interface lock */ 1695 void ieee80211_recalc_ps(struct ieee80211_local *local) 1696 { 1697 struct ieee80211_sub_if_data *sdata, *found = NULL; 1698 int count = 0; 1699 int timeout; 1700 1701 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1702 local->ps_sdata = NULL; 1703 return; 1704 } 1705 1706 list_for_each_entry(sdata, &local->interfaces, list) { 1707 if (!ieee80211_sdata_running(sdata)) 1708 continue; 1709 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1710 /* If an AP vif is found, then disable PS 1711 * by setting the count to zero thereby setting 1712 * ps_sdata to NULL. 1713 */ 1714 count = 0; 1715 break; 1716 } 1717 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1718 continue; 1719 found = sdata; 1720 count++; 1721 } 1722 1723 if (count == 1 && ieee80211_powersave_allowed(found)) { 1724 u8 dtimper = found->u.mgd.dtim_period; 1725 1726 timeout = local->dynamic_ps_forced_timeout; 1727 if (timeout < 0) 1728 timeout = 100; 1729 local->hw.conf.dynamic_ps_timeout = timeout; 1730 1731 /* If the TIM IE is invalid, pretend the value is 1 */ 1732 if (!dtimper) 1733 dtimper = 1; 1734 1735 local->hw.conf.ps_dtim_period = dtimper; 1736 local->ps_sdata = found; 1737 } else { 1738 local->ps_sdata = NULL; 1739 } 1740 1741 ieee80211_change_ps(local); 1742 } 1743 1744 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1745 { 1746 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1747 1748 if (sdata->vif.bss_conf.ps != ps_allowed) { 1749 sdata->vif.bss_conf.ps = ps_allowed; 1750 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1751 } 1752 } 1753 1754 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1755 { 1756 struct ieee80211_local *local = 1757 container_of(work, struct ieee80211_local, 1758 dynamic_ps_disable_work); 1759 1760 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1761 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1762 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1763 } 1764 1765 ieee80211_wake_queues_by_reason(&local->hw, 1766 IEEE80211_MAX_QUEUE_MAP, 1767 IEEE80211_QUEUE_STOP_REASON_PS, 1768 false); 1769 } 1770 1771 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1772 { 1773 struct ieee80211_local *local = 1774 container_of(work, struct ieee80211_local, 1775 dynamic_ps_enable_work); 1776 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1777 struct ieee80211_if_managed *ifmgd; 1778 unsigned long flags; 1779 int q; 1780 1781 /* can only happen when PS was just disabled anyway */ 1782 if (!sdata) 1783 return; 1784 1785 ifmgd = &sdata->u.mgd; 1786 1787 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1788 return; 1789 1790 if (local->hw.conf.dynamic_ps_timeout > 0) { 1791 /* don't enter PS if TX frames are pending */ 1792 if (drv_tx_frames_pending(local)) { 1793 mod_timer(&local->dynamic_ps_timer, jiffies + 1794 msecs_to_jiffies( 1795 local->hw.conf.dynamic_ps_timeout)); 1796 return; 1797 } 1798 1799 /* 1800 * transmission can be stopped by others which leads to 1801 * dynamic_ps_timer expiry. Postpone the ps timer if it 1802 * is not the actual idle state. 1803 */ 1804 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1805 for (q = 0; q < local->hw.queues; q++) { 1806 if (local->queue_stop_reasons[q]) { 1807 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1808 flags); 1809 mod_timer(&local->dynamic_ps_timer, jiffies + 1810 msecs_to_jiffies( 1811 local->hw.conf.dynamic_ps_timeout)); 1812 return; 1813 } 1814 } 1815 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1816 } 1817 1818 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1819 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1820 if (drv_tx_frames_pending(local)) { 1821 mod_timer(&local->dynamic_ps_timer, jiffies + 1822 msecs_to_jiffies( 1823 local->hw.conf.dynamic_ps_timeout)); 1824 } else { 1825 ieee80211_send_nullfunc(local, sdata, true); 1826 /* Flush to get the tx status of nullfunc frame */ 1827 ieee80211_flush_queues(local, sdata, false); 1828 } 1829 } 1830 1831 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1832 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1833 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1834 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1835 local->hw.conf.flags |= IEEE80211_CONF_PS; 1836 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1837 } 1838 } 1839 1840 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1841 { 1842 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1843 1844 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1845 } 1846 1847 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1848 { 1849 struct delayed_work *delayed_work = to_delayed_work(work); 1850 struct ieee80211_sub_if_data *sdata = 1851 container_of(delayed_work, struct ieee80211_sub_if_data, 1852 dfs_cac_timer_work); 1853 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1854 1855 mutex_lock(&sdata->local->mtx); 1856 if (sdata->wdev.cac_started) { 1857 ieee80211_vif_release_channel(sdata); 1858 cfg80211_cac_event(sdata->dev, &chandef, 1859 NL80211_RADAR_CAC_FINISHED, 1860 GFP_KERNEL); 1861 } 1862 mutex_unlock(&sdata->local->mtx); 1863 } 1864 1865 static bool 1866 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1867 { 1868 struct ieee80211_local *local = sdata->local; 1869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1870 bool ret = false; 1871 int ac; 1872 1873 if (local->hw.queues < IEEE80211_NUM_ACS) 1874 return false; 1875 1876 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1877 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1878 int non_acm_ac; 1879 unsigned long now = jiffies; 1880 1881 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1882 tx_tspec->admitted_time && 1883 time_after(now, tx_tspec->time_slice_start + HZ)) { 1884 tx_tspec->consumed_tx_time = 0; 1885 tx_tspec->time_slice_start = now; 1886 1887 if (tx_tspec->downgraded) 1888 tx_tspec->action = 1889 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1890 } 1891 1892 switch (tx_tspec->action) { 1893 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1894 /* take the original parameters */ 1895 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1896 sdata_err(sdata, 1897 "failed to set TX queue parameters for queue %d\n", 1898 ac); 1899 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1900 tx_tspec->downgraded = false; 1901 ret = true; 1902 break; 1903 case TX_TSPEC_ACTION_DOWNGRADE: 1904 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1905 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1906 ret = true; 1907 break; 1908 } 1909 /* downgrade next lower non-ACM AC */ 1910 for (non_acm_ac = ac + 1; 1911 non_acm_ac < IEEE80211_NUM_ACS; 1912 non_acm_ac++) 1913 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1914 break; 1915 /* Usually the loop will result in using BK even if it 1916 * requires admission control, but such a configuration 1917 * makes no sense and we have to transmit somehow - the 1918 * AC selection does the same thing. 1919 * If we started out trying to downgrade from BK, then 1920 * the extra condition here might be needed. 1921 */ 1922 if (non_acm_ac >= IEEE80211_NUM_ACS) 1923 non_acm_ac = IEEE80211_AC_BK; 1924 if (drv_conf_tx(local, sdata, ac, 1925 &sdata->tx_conf[non_acm_ac])) 1926 sdata_err(sdata, 1927 "failed to set TX queue parameters for queue %d\n", 1928 ac); 1929 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1930 ret = true; 1931 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1932 tx_tspec->time_slice_start + HZ - now + 1); 1933 break; 1934 case TX_TSPEC_ACTION_NONE: 1935 /* nothing now */ 1936 break; 1937 } 1938 } 1939 1940 return ret; 1941 } 1942 1943 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1944 { 1945 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1946 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1947 } 1948 1949 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1950 { 1951 struct ieee80211_sub_if_data *sdata; 1952 1953 sdata = container_of(work, struct ieee80211_sub_if_data, 1954 u.mgd.tx_tspec_wk.work); 1955 ieee80211_sta_handle_tspec_ac_params(sdata); 1956 } 1957 1958 /* MLME */ 1959 static bool 1960 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1961 struct ieee80211_sub_if_data *sdata, 1962 const u8 *wmm_param, size_t wmm_param_len, 1963 const struct ieee80211_mu_edca_param_set *mu_edca) 1964 { 1965 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1967 size_t left; 1968 int count, mu_edca_count, ac; 1969 const u8 *pos; 1970 u8 uapsd_queues = 0; 1971 1972 if (!local->ops->conf_tx) 1973 return false; 1974 1975 if (local->hw.queues < IEEE80211_NUM_ACS) 1976 return false; 1977 1978 if (!wmm_param) 1979 return false; 1980 1981 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1982 return false; 1983 1984 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1985 uapsd_queues = ifmgd->uapsd_queues; 1986 1987 count = wmm_param[6] & 0x0f; 1988 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1989 * if mu_edca was preset before and now it disappeared tell 1990 * the driver about it. 1991 */ 1992 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1993 if (count == ifmgd->wmm_last_param_set && 1994 mu_edca_count == ifmgd->mu_edca_last_param_set) 1995 return false; 1996 ifmgd->wmm_last_param_set = count; 1997 ifmgd->mu_edca_last_param_set = mu_edca_count; 1998 1999 pos = wmm_param + 8; 2000 left = wmm_param_len - 8; 2001 2002 memset(¶ms, 0, sizeof(params)); 2003 2004 sdata->wmm_acm = 0; 2005 for (; left >= 4; left -= 4, pos += 4) { 2006 int aci = (pos[0] >> 5) & 0x03; 2007 int acm = (pos[0] >> 4) & 0x01; 2008 bool uapsd = false; 2009 2010 switch (aci) { 2011 case 1: /* AC_BK */ 2012 ac = IEEE80211_AC_BK; 2013 if (acm) 2014 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2015 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2016 uapsd = true; 2017 params[ac].mu_edca = !!mu_edca; 2018 if (mu_edca) 2019 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2020 break; 2021 case 2: /* AC_VI */ 2022 ac = IEEE80211_AC_VI; 2023 if (acm) 2024 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2025 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2026 uapsd = true; 2027 params[ac].mu_edca = !!mu_edca; 2028 if (mu_edca) 2029 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2030 break; 2031 case 3: /* AC_VO */ 2032 ac = IEEE80211_AC_VO; 2033 if (acm) 2034 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2035 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2036 uapsd = true; 2037 params[ac].mu_edca = !!mu_edca; 2038 if (mu_edca) 2039 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2040 break; 2041 case 0: /* AC_BE */ 2042 default: 2043 ac = IEEE80211_AC_BE; 2044 if (acm) 2045 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2046 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2047 uapsd = true; 2048 params[ac].mu_edca = !!mu_edca; 2049 if (mu_edca) 2050 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2051 break; 2052 } 2053 2054 params[ac].aifs = pos[0] & 0x0f; 2055 2056 if (params[ac].aifs < 2) { 2057 sdata_info(sdata, 2058 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2059 params[ac].aifs, aci); 2060 params[ac].aifs = 2; 2061 } 2062 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2063 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2064 params[ac].txop = get_unaligned_le16(pos + 2); 2065 params[ac].acm = acm; 2066 params[ac].uapsd = uapsd; 2067 2068 if (params[ac].cw_min == 0 || 2069 params[ac].cw_min > params[ac].cw_max) { 2070 sdata_info(sdata, 2071 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2072 params[ac].cw_min, params[ac].cw_max, aci); 2073 return false; 2074 } 2075 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2076 } 2077 2078 /* WMM specification requires all 4 ACIs. */ 2079 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2080 if (params[ac].cw_min == 0) { 2081 sdata_info(sdata, 2082 "AP has invalid WMM params (missing AC %d), using defaults\n", 2083 ac); 2084 return false; 2085 } 2086 } 2087 2088 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2089 mlme_dbg(sdata, 2090 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2091 ac, params[ac].acm, 2092 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2093 params[ac].txop, params[ac].uapsd, 2094 ifmgd->tx_tspec[ac].downgraded); 2095 sdata->tx_conf[ac] = params[ac]; 2096 if (!ifmgd->tx_tspec[ac].downgraded && 2097 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2098 sdata_err(sdata, 2099 "failed to set TX queue parameters for AC %d\n", 2100 ac); 2101 } 2102 2103 /* enable WMM or activate new settings */ 2104 sdata->vif.bss_conf.qos = true; 2105 return true; 2106 } 2107 2108 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2109 { 2110 lockdep_assert_held(&sdata->local->mtx); 2111 2112 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2113 ieee80211_run_deferred_scan(sdata->local); 2114 } 2115 2116 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2117 { 2118 mutex_lock(&sdata->local->mtx); 2119 __ieee80211_stop_poll(sdata); 2120 mutex_unlock(&sdata->local->mtx); 2121 } 2122 2123 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2124 u16 capab, bool erp_valid, u8 erp) 2125 { 2126 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2127 struct ieee80211_supported_band *sband; 2128 u32 changed = 0; 2129 bool use_protection; 2130 bool use_short_preamble; 2131 bool use_short_slot; 2132 2133 sband = ieee80211_get_sband(sdata); 2134 if (!sband) 2135 return changed; 2136 2137 if (erp_valid) { 2138 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2139 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2140 } else { 2141 use_protection = false; 2142 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2143 } 2144 2145 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2146 if (sband->band == NL80211_BAND_5GHZ || 2147 sband->band == NL80211_BAND_6GHZ) 2148 use_short_slot = true; 2149 2150 if (use_protection != bss_conf->use_cts_prot) { 2151 bss_conf->use_cts_prot = use_protection; 2152 changed |= BSS_CHANGED_ERP_CTS_PROT; 2153 } 2154 2155 if (use_short_preamble != bss_conf->use_short_preamble) { 2156 bss_conf->use_short_preamble = use_short_preamble; 2157 changed |= BSS_CHANGED_ERP_PREAMBLE; 2158 } 2159 2160 if (use_short_slot != bss_conf->use_short_slot) { 2161 bss_conf->use_short_slot = use_short_slot; 2162 changed |= BSS_CHANGED_ERP_SLOT; 2163 } 2164 2165 return changed; 2166 } 2167 2168 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2169 struct cfg80211_bss *cbss, 2170 u32 bss_info_changed) 2171 { 2172 struct ieee80211_bss *bss = (void *)cbss->priv; 2173 struct ieee80211_local *local = sdata->local; 2174 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2175 2176 bss_info_changed |= BSS_CHANGED_ASSOC; 2177 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2178 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2179 2180 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2181 beacon_loss_count * bss_conf->beacon_int)); 2182 2183 sdata->u.mgd.associated = cbss; 2184 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2185 2186 ieee80211_check_rate_mask(sdata); 2187 2188 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2189 2190 if (sdata->vif.p2p || 2191 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2192 const struct cfg80211_bss_ies *ies; 2193 2194 rcu_read_lock(); 2195 ies = rcu_dereference(cbss->ies); 2196 if (ies) { 2197 int ret; 2198 2199 ret = cfg80211_get_p2p_attr( 2200 ies->data, ies->len, 2201 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2202 (u8 *) &bss_conf->p2p_noa_attr, 2203 sizeof(bss_conf->p2p_noa_attr)); 2204 if (ret >= 2) { 2205 sdata->u.mgd.p2p_noa_index = 2206 bss_conf->p2p_noa_attr.index; 2207 bss_info_changed |= BSS_CHANGED_P2P_PS; 2208 } 2209 } 2210 rcu_read_unlock(); 2211 } 2212 2213 /* just to be sure */ 2214 ieee80211_stop_poll(sdata); 2215 2216 ieee80211_led_assoc(local, 1); 2217 2218 if (sdata->u.mgd.have_beacon) { 2219 /* 2220 * If the AP is buggy we may get here with no DTIM period 2221 * known, so assume it's 1 which is the only safe assumption 2222 * in that case, although if the TIM IE is broken powersave 2223 * probably just won't work at all. 2224 */ 2225 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2226 bss_conf->beacon_rate = bss->beacon_rate; 2227 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2228 } else { 2229 bss_conf->beacon_rate = NULL; 2230 bss_conf->dtim_period = 0; 2231 } 2232 2233 bss_conf->assoc = 1; 2234 2235 /* Tell the driver to monitor connection quality (if supported) */ 2236 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2237 bss_conf->cqm_rssi_thold) 2238 bss_info_changed |= BSS_CHANGED_CQM; 2239 2240 /* Enable ARP filtering */ 2241 if (bss_conf->arp_addr_cnt) 2242 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2243 2244 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2245 2246 mutex_lock(&local->iflist_mtx); 2247 ieee80211_recalc_ps(local); 2248 mutex_unlock(&local->iflist_mtx); 2249 2250 ieee80211_recalc_smps(sdata); 2251 ieee80211_recalc_ps_vif(sdata); 2252 2253 netif_carrier_on(sdata->dev); 2254 } 2255 2256 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2257 u16 stype, u16 reason, bool tx, 2258 u8 *frame_buf) 2259 { 2260 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2261 struct ieee80211_local *local = sdata->local; 2262 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2263 u32 changed = 0; 2264 struct ieee80211_prep_tx_info info = { 2265 .subtype = stype, 2266 }; 2267 2268 sdata_assert_lock(sdata); 2269 2270 if (WARN_ON_ONCE(tx && !frame_buf)) 2271 return; 2272 2273 if (WARN_ON(!ifmgd->associated)) 2274 return; 2275 2276 ieee80211_stop_poll(sdata); 2277 2278 ifmgd->associated = NULL; 2279 netif_carrier_off(sdata->dev); 2280 2281 /* 2282 * if we want to get out of ps before disassoc (why?) we have 2283 * to do it before sending disassoc, as otherwise the null-packet 2284 * won't be valid. 2285 */ 2286 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2287 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2288 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2289 } 2290 local->ps_sdata = NULL; 2291 2292 /* disable per-vif ps */ 2293 ieee80211_recalc_ps_vif(sdata); 2294 2295 /* make sure ongoing transmission finishes */ 2296 synchronize_net(); 2297 2298 /* 2299 * drop any frame before deauth/disassoc, this can be data or 2300 * management frame. Since we are disconnecting, we should not 2301 * insist sending these frames which can take time and delay 2302 * the disconnection and possible the roaming. 2303 */ 2304 if (tx) 2305 ieee80211_flush_queues(local, sdata, true); 2306 2307 /* deauthenticate/disassociate now */ 2308 if (tx || frame_buf) { 2309 /* 2310 * In multi channel scenarios guarantee that the virtual 2311 * interface is granted immediate airtime to transmit the 2312 * deauthentication frame by calling mgd_prepare_tx, if the 2313 * driver requested so. 2314 */ 2315 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2316 !ifmgd->have_beacon) { 2317 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2318 } 2319 2320 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2321 ifmgd->bssid, stype, reason, 2322 tx, frame_buf); 2323 } 2324 2325 /* flush out frame - make sure the deauth was actually sent */ 2326 if (tx) 2327 ieee80211_flush_queues(local, sdata, false); 2328 2329 drv_mgd_complete_tx(sdata->local, sdata, &info); 2330 2331 /* clear bssid only after building the needed mgmt frames */ 2332 eth_zero_addr(ifmgd->bssid); 2333 2334 sdata->vif.bss_conf.ssid_len = 0; 2335 2336 /* remove AP and TDLS peers */ 2337 sta_info_flush(sdata); 2338 2339 /* finally reset all BSS / config parameters */ 2340 changed |= ieee80211_reset_erp_info(sdata); 2341 2342 ieee80211_led_assoc(local, 0); 2343 changed |= BSS_CHANGED_ASSOC; 2344 sdata->vif.bss_conf.assoc = false; 2345 2346 ifmgd->p2p_noa_index = -1; 2347 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2348 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2349 2350 /* on the next assoc, re-program HT/VHT parameters */ 2351 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2352 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2353 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2354 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2355 2356 /* reset MU-MIMO ownership and group data */ 2357 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2358 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2359 memset(sdata->vif.bss_conf.mu_group.position, 0, 2360 sizeof(sdata->vif.bss_conf.mu_group.position)); 2361 changed |= BSS_CHANGED_MU_GROUPS; 2362 sdata->vif.mu_mimo_owner = false; 2363 2364 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2365 2366 del_timer_sync(&local->dynamic_ps_timer); 2367 cancel_work_sync(&local->dynamic_ps_enable_work); 2368 2369 /* Disable ARP filtering */ 2370 if (sdata->vif.bss_conf.arp_addr_cnt) 2371 changed |= BSS_CHANGED_ARP_FILTER; 2372 2373 sdata->vif.bss_conf.qos = false; 2374 changed |= BSS_CHANGED_QOS; 2375 2376 /* The BSSID (not really interesting) and HT changed */ 2377 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2378 ieee80211_bss_info_change_notify(sdata, changed); 2379 2380 /* disassociated - set to defaults now */ 2381 ieee80211_set_wmm_default(sdata, false, false); 2382 2383 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2384 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2385 del_timer_sync(&sdata->u.mgd.timer); 2386 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2387 2388 sdata->vif.bss_conf.dtim_period = 0; 2389 sdata->vif.bss_conf.beacon_rate = NULL; 2390 2391 ifmgd->have_beacon = false; 2392 2393 ifmgd->flags = 0; 2394 mutex_lock(&local->mtx); 2395 ieee80211_vif_release_channel(sdata); 2396 2397 sdata->vif.csa_active = false; 2398 ifmgd->csa_waiting_bcn = false; 2399 ifmgd->csa_ignored_same_chan = false; 2400 if (sdata->csa_block_tx) { 2401 ieee80211_wake_vif_queues(local, sdata, 2402 IEEE80211_QUEUE_STOP_REASON_CSA); 2403 sdata->csa_block_tx = false; 2404 } 2405 mutex_unlock(&local->mtx); 2406 2407 /* existing TX TSPEC sessions no longer exist */ 2408 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2409 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2410 2411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2412 2413 bss_conf->pwr_reduction = 0; 2414 bss_conf->tx_pwr_env_num = 0; 2415 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2416 } 2417 2418 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2419 { 2420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2421 struct ieee80211_local *local = sdata->local; 2422 2423 mutex_lock(&local->mtx); 2424 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2425 goto out; 2426 2427 __ieee80211_stop_poll(sdata); 2428 2429 mutex_lock(&local->iflist_mtx); 2430 ieee80211_recalc_ps(local); 2431 mutex_unlock(&local->iflist_mtx); 2432 2433 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2434 goto out; 2435 2436 /* 2437 * We've received a probe response, but are not sure whether 2438 * we have or will be receiving any beacons or data, so let's 2439 * schedule the timers again, just in case. 2440 */ 2441 ieee80211_sta_reset_beacon_monitor(sdata); 2442 2443 mod_timer(&ifmgd->conn_mon_timer, 2444 round_jiffies_up(jiffies + 2445 IEEE80211_CONNECTION_IDLE_TIME)); 2446 out: 2447 mutex_unlock(&local->mtx); 2448 } 2449 2450 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2451 struct ieee80211_hdr *hdr, 2452 u16 tx_time) 2453 { 2454 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2455 u16 tid = ieee80211_get_tid(hdr); 2456 int ac = ieee80211_ac_from_tid(tid); 2457 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2458 unsigned long now = jiffies; 2459 2460 if (likely(!tx_tspec->admitted_time)) 2461 return; 2462 2463 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2464 tx_tspec->consumed_tx_time = 0; 2465 tx_tspec->time_slice_start = now; 2466 2467 if (tx_tspec->downgraded) { 2468 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2469 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2470 } 2471 } 2472 2473 if (tx_tspec->downgraded) 2474 return; 2475 2476 tx_tspec->consumed_tx_time += tx_time; 2477 2478 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2479 tx_tspec->downgraded = true; 2480 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2481 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2482 } 2483 } 2484 2485 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2486 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2487 { 2488 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2489 2490 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2491 !sdata->u.mgd.probe_send_count) 2492 return; 2493 2494 if (ack) 2495 sdata->u.mgd.probe_send_count = 0; 2496 else 2497 sdata->u.mgd.nullfunc_failed = true; 2498 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2499 } 2500 2501 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2502 const u8 *src, const u8 *dst, 2503 const u8 *ssid, size_t ssid_len, 2504 struct ieee80211_channel *channel) 2505 { 2506 struct sk_buff *skb; 2507 2508 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2509 ssid, ssid_len, NULL, 0, 2510 IEEE80211_PROBE_FLAG_DIRECTED); 2511 if (skb) 2512 ieee80211_tx_skb(sdata, skb); 2513 } 2514 2515 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2516 { 2517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2518 const struct element *ssid; 2519 u8 *dst = ifmgd->associated->bssid; 2520 u8 unicast_limit = max(1, max_probe_tries - 3); 2521 struct sta_info *sta; 2522 2523 /* 2524 * Try sending broadcast probe requests for the last three 2525 * probe requests after the first ones failed since some 2526 * buggy APs only support broadcast probe requests. 2527 */ 2528 if (ifmgd->probe_send_count >= unicast_limit) 2529 dst = NULL; 2530 2531 /* 2532 * When the hardware reports an accurate Tx ACK status, it's 2533 * better to send a nullfunc frame instead of a probe request, 2534 * as it will kick us off the AP quickly if we aren't associated 2535 * anymore. The timeout will be reset if the frame is ACKed by 2536 * the AP. 2537 */ 2538 ifmgd->probe_send_count++; 2539 2540 if (dst) { 2541 mutex_lock(&sdata->local->sta_mtx); 2542 sta = sta_info_get(sdata, dst); 2543 if (!WARN_ON(!sta)) 2544 ieee80211_check_fast_rx(sta); 2545 mutex_unlock(&sdata->local->sta_mtx); 2546 } 2547 2548 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2549 ifmgd->nullfunc_failed = false; 2550 ieee80211_send_nullfunc(sdata->local, sdata, false); 2551 } else { 2552 int ssid_len; 2553 2554 rcu_read_lock(); 2555 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); 2556 if (WARN_ON_ONCE(ssid == NULL)) 2557 ssid_len = 0; 2558 else 2559 ssid_len = ssid->datalen; 2560 2561 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2562 ssid->data, ssid_len, 2563 ifmgd->associated->channel); 2564 rcu_read_unlock(); 2565 } 2566 2567 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2568 run_again(sdata, ifmgd->probe_timeout); 2569 } 2570 2571 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2572 bool beacon) 2573 { 2574 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2575 bool already = false; 2576 2577 if (!ieee80211_sdata_running(sdata)) 2578 return; 2579 2580 sdata_lock(sdata); 2581 2582 if (!ifmgd->associated) 2583 goto out; 2584 2585 mutex_lock(&sdata->local->mtx); 2586 2587 if (sdata->local->tmp_channel || sdata->local->scanning) { 2588 mutex_unlock(&sdata->local->mtx); 2589 goto out; 2590 } 2591 2592 if (sdata->local->suspending) { 2593 /* reschedule after resume */ 2594 mutex_unlock(&sdata->local->mtx); 2595 ieee80211_reset_ap_probe(sdata); 2596 goto out; 2597 } 2598 2599 if (beacon) { 2600 mlme_dbg_ratelimited(sdata, 2601 "detected beacon loss from AP (missed %d beacons) - probing\n", 2602 beacon_loss_count); 2603 2604 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2605 } 2606 2607 /* 2608 * The driver/our work has already reported this event or the 2609 * connection monitoring has kicked in and we have already sent 2610 * a probe request. Or maybe the AP died and the driver keeps 2611 * reporting until we disassociate... 2612 * 2613 * In either case we have to ignore the current call to this 2614 * function (except for setting the correct probe reason bit) 2615 * because otherwise we would reset the timer every time and 2616 * never check whether we received a probe response! 2617 */ 2618 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2619 already = true; 2620 2621 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2622 2623 mutex_unlock(&sdata->local->mtx); 2624 2625 if (already) 2626 goto out; 2627 2628 mutex_lock(&sdata->local->iflist_mtx); 2629 ieee80211_recalc_ps(sdata->local); 2630 mutex_unlock(&sdata->local->iflist_mtx); 2631 2632 ifmgd->probe_send_count = 0; 2633 ieee80211_mgd_probe_ap_send(sdata); 2634 out: 2635 sdata_unlock(sdata); 2636 } 2637 2638 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2639 struct ieee80211_vif *vif) 2640 { 2641 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2643 struct cfg80211_bss *cbss; 2644 struct sk_buff *skb; 2645 const struct element *ssid; 2646 int ssid_len; 2647 2648 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2649 return NULL; 2650 2651 sdata_assert_lock(sdata); 2652 2653 if (ifmgd->associated) 2654 cbss = ifmgd->associated; 2655 else if (ifmgd->auth_data) 2656 cbss = ifmgd->auth_data->bss; 2657 else if (ifmgd->assoc_data) 2658 cbss = ifmgd->assoc_data->bss; 2659 else 2660 return NULL; 2661 2662 rcu_read_lock(); 2663 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2664 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2665 "invalid SSID element (len=%d)", 2666 ssid ? ssid->datalen : -1)) 2667 ssid_len = 0; 2668 else 2669 ssid_len = ssid->datalen; 2670 2671 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2672 (u32) -1, cbss->channel, 2673 ssid->data, ssid_len, 2674 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2675 rcu_read_unlock(); 2676 2677 return skb; 2678 } 2679 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2680 2681 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2682 const u8 *buf, size_t len, bool tx, 2683 u16 reason, bool reconnect) 2684 { 2685 struct ieee80211_event event = { 2686 .type = MLME_EVENT, 2687 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2688 .u.mlme.reason = reason, 2689 }; 2690 2691 if (tx) 2692 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2693 else 2694 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2695 2696 drv_event_callback(sdata->local, sdata, &event); 2697 } 2698 2699 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2700 { 2701 struct ieee80211_local *local = sdata->local; 2702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2703 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2704 bool tx; 2705 2706 sdata_lock(sdata); 2707 if (!ifmgd->associated) { 2708 sdata_unlock(sdata); 2709 return; 2710 } 2711 2712 tx = !sdata->csa_block_tx; 2713 2714 if (!ifmgd->driver_disconnect) { 2715 /* 2716 * AP is probably out of range (or not reachable for another 2717 * reason) so remove the bss struct for that AP. 2718 */ 2719 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2720 } 2721 2722 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2723 ifmgd->driver_disconnect ? 2724 WLAN_REASON_DEAUTH_LEAVING : 2725 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2726 tx, frame_buf); 2727 mutex_lock(&local->mtx); 2728 sdata->vif.csa_active = false; 2729 ifmgd->csa_waiting_bcn = false; 2730 if (sdata->csa_block_tx) { 2731 ieee80211_wake_vif_queues(local, sdata, 2732 IEEE80211_QUEUE_STOP_REASON_CSA); 2733 sdata->csa_block_tx = false; 2734 } 2735 mutex_unlock(&local->mtx); 2736 2737 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2738 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2739 ifmgd->reconnect); 2740 ifmgd->reconnect = false; 2741 2742 sdata_unlock(sdata); 2743 } 2744 2745 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2746 { 2747 struct ieee80211_sub_if_data *sdata = 2748 container_of(work, struct ieee80211_sub_if_data, 2749 u.mgd.beacon_connection_loss_work); 2750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2751 2752 if (ifmgd->associated) 2753 ifmgd->beacon_loss_count++; 2754 2755 if (ifmgd->connection_loss) { 2756 sdata_info(sdata, "Connection to AP %pM lost\n", 2757 ifmgd->bssid); 2758 __ieee80211_disconnect(sdata); 2759 ifmgd->connection_loss = false; 2760 } else if (ifmgd->driver_disconnect) { 2761 sdata_info(sdata, 2762 "Driver requested disconnection from AP %pM\n", 2763 ifmgd->bssid); 2764 __ieee80211_disconnect(sdata); 2765 ifmgd->driver_disconnect = false; 2766 } else { 2767 ieee80211_mgd_probe_ap(sdata, true); 2768 } 2769 } 2770 2771 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2772 { 2773 struct ieee80211_sub_if_data *sdata = 2774 container_of(work, struct ieee80211_sub_if_data, 2775 u.mgd.csa_connection_drop_work); 2776 2777 __ieee80211_disconnect(sdata); 2778 } 2779 2780 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2781 { 2782 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2783 struct ieee80211_hw *hw = &sdata->local->hw; 2784 2785 trace_api_beacon_loss(sdata); 2786 2787 sdata->u.mgd.connection_loss = false; 2788 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2789 } 2790 EXPORT_SYMBOL(ieee80211_beacon_loss); 2791 2792 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2793 { 2794 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2795 struct ieee80211_hw *hw = &sdata->local->hw; 2796 2797 trace_api_connection_loss(sdata); 2798 2799 sdata->u.mgd.connection_loss = true; 2800 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2801 } 2802 EXPORT_SYMBOL(ieee80211_connection_loss); 2803 2804 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2805 { 2806 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2807 struct ieee80211_hw *hw = &sdata->local->hw; 2808 2809 trace_api_disconnect(sdata, reconnect); 2810 2811 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2812 return; 2813 2814 sdata->u.mgd.driver_disconnect = true; 2815 sdata->u.mgd.reconnect = reconnect; 2816 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2817 } 2818 EXPORT_SYMBOL(ieee80211_disconnect); 2819 2820 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2821 bool assoc) 2822 { 2823 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2824 2825 sdata_assert_lock(sdata); 2826 2827 if (!assoc) { 2828 /* 2829 * we are not authenticated yet, the only timer that could be 2830 * running is the timeout for the authentication response which 2831 * which is not relevant anymore. 2832 */ 2833 del_timer_sync(&sdata->u.mgd.timer); 2834 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2835 2836 eth_zero_addr(sdata->u.mgd.bssid); 2837 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2838 sdata->u.mgd.flags = 0; 2839 mutex_lock(&sdata->local->mtx); 2840 ieee80211_vif_release_channel(sdata); 2841 mutex_unlock(&sdata->local->mtx); 2842 } 2843 2844 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2845 kfree(auth_data); 2846 sdata->u.mgd.auth_data = NULL; 2847 } 2848 2849 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2850 bool assoc, bool abandon) 2851 { 2852 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2853 2854 sdata_assert_lock(sdata); 2855 2856 if (!assoc) { 2857 /* 2858 * we are not associated yet, the only timer that could be 2859 * running is the timeout for the association response which 2860 * which is not relevant anymore. 2861 */ 2862 del_timer_sync(&sdata->u.mgd.timer); 2863 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2864 2865 eth_zero_addr(sdata->u.mgd.bssid); 2866 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2867 sdata->u.mgd.flags = 0; 2868 sdata->vif.mu_mimo_owner = false; 2869 2870 mutex_lock(&sdata->local->mtx); 2871 ieee80211_vif_release_channel(sdata); 2872 mutex_unlock(&sdata->local->mtx); 2873 2874 if (abandon) 2875 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2876 } 2877 2878 kfree(assoc_data); 2879 sdata->u.mgd.assoc_data = NULL; 2880 } 2881 2882 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2883 struct ieee80211_mgmt *mgmt, size_t len) 2884 { 2885 struct ieee80211_local *local = sdata->local; 2886 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2887 const struct element *challenge; 2888 u8 *pos; 2889 u32 tx_flags = 0; 2890 struct ieee80211_prep_tx_info info = { 2891 .subtype = IEEE80211_STYPE_AUTH, 2892 }; 2893 2894 pos = mgmt->u.auth.variable; 2895 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2896 len - (pos - (u8 *)mgmt)); 2897 if (!challenge) 2898 return; 2899 auth_data->expected_transaction = 4; 2900 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2901 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2902 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2903 IEEE80211_TX_INTFL_MLME_CONN_TX; 2904 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2905 (void *)challenge, 2906 challenge->datalen + sizeof(*challenge), 2907 auth_data->bss->bssid, auth_data->bss->bssid, 2908 auth_data->key, auth_data->key_len, 2909 auth_data->key_idx, tx_flags); 2910 } 2911 2912 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2913 const u8 *bssid) 2914 { 2915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2916 struct sta_info *sta; 2917 bool result = true; 2918 2919 sdata_info(sdata, "authenticated\n"); 2920 ifmgd->auth_data->done = true; 2921 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2922 ifmgd->auth_data->timeout_started = true; 2923 run_again(sdata, ifmgd->auth_data->timeout); 2924 2925 /* move station state to auth */ 2926 mutex_lock(&sdata->local->sta_mtx); 2927 sta = sta_info_get(sdata, bssid); 2928 if (!sta) { 2929 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2930 result = false; 2931 goto out; 2932 } 2933 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2934 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2935 result = false; 2936 goto out; 2937 } 2938 2939 out: 2940 mutex_unlock(&sdata->local->sta_mtx); 2941 return result; 2942 } 2943 2944 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2945 struct ieee80211_mgmt *mgmt, size_t len) 2946 { 2947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2948 u8 bssid[ETH_ALEN]; 2949 u16 auth_alg, auth_transaction, status_code; 2950 struct ieee80211_event event = { 2951 .type = MLME_EVENT, 2952 .u.mlme.data = AUTH_EVENT, 2953 }; 2954 struct ieee80211_prep_tx_info info = { 2955 .subtype = IEEE80211_STYPE_AUTH, 2956 }; 2957 2958 sdata_assert_lock(sdata); 2959 2960 if (len < 24 + 6) 2961 return; 2962 2963 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2964 return; 2965 2966 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2967 2968 if (!ether_addr_equal(bssid, mgmt->bssid)) 2969 return; 2970 2971 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2972 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2973 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2974 2975 if (auth_alg != ifmgd->auth_data->algorithm || 2976 (auth_alg != WLAN_AUTH_SAE && 2977 auth_transaction != ifmgd->auth_data->expected_transaction) || 2978 (auth_alg == WLAN_AUTH_SAE && 2979 (auth_transaction < ifmgd->auth_data->expected_transaction || 2980 auth_transaction > 2))) { 2981 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2982 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2983 auth_transaction, 2984 ifmgd->auth_data->expected_transaction); 2985 goto notify_driver; 2986 } 2987 2988 if (status_code != WLAN_STATUS_SUCCESS) { 2989 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2990 2991 if (auth_alg == WLAN_AUTH_SAE && 2992 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 2993 (auth_transaction == 1 && 2994 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 2995 status_code == WLAN_STATUS_SAE_PK)))) 2996 goto notify_driver; 2997 2998 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2999 mgmt->sa, status_code); 3000 ieee80211_destroy_auth_data(sdata, false); 3001 event.u.mlme.status = MLME_DENIED; 3002 event.u.mlme.reason = status_code; 3003 drv_event_callback(sdata->local, sdata, &event); 3004 goto notify_driver; 3005 } 3006 3007 switch (ifmgd->auth_data->algorithm) { 3008 case WLAN_AUTH_OPEN: 3009 case WLAN_AUTH_LEAP: 3010 case WLAN_AUTH_FT: 3011 case WLAN_AUTH_SAE: 3012 case WLAN_AUTH_FILS_SK: 3013 case WLAN_AUTH_FILS_SK_PFS: 3014 case WLAN_AUTH_FILS_PK: 3015 break; 3016 case WLAN_AUTH_SHARED_KEY: 3017 if (ifmgd->auth_data->expected_transaction != 4) { 3018 ieee80211_auth_challenge(sdata, mgmt, len); 3019 /* need another frame */ 3020 return; 3021 } 3022 break; 3023 default: 3024 WARN_ONCE(1, "invalid auth alg %d", 3025 ifmgd->auth_data->algorithm); 3026 goto notify_driver; 3027 } 3028 3029 event.u.mlme.status = MLME_SUCCESS; 3030 info.success = 1; 3031 drv_event_callback(sdata->local, sdata, &event); 3032 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3033 (auth_transaction == 2 && 3034 ifmgd->auth_data->expected_transaction == 2)) { 3035 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3036 return; /* ignore frame -- wait for timeout */ 3037 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3038 auth_transaction == 2) { 3039 sdata_info(sdata, "SAE peer confirmed\n"); 3040 ifmgd->auth_data->peer_confirmed = true; 3041 } 3042 3043 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3044 notify_driver: 3045 drv_mgd_complete_tx(sdata->local, sdata, &info); 3046 } 3047 3048 #define case_WLAN(type) \ 3049 case WLAN_REASON_##type: return #type 3050 3051 const char *ieee80211_get_reason_code_string(u16 reason_code) 3052 { 3053 switch (reason_code) { 3054 case_WLAN(UNSPECIFIED); 3055 case_WLAN(PREV_AUTH_NOT_VALID); 3056 case_WLAN(DEAUTH_LEAVING); 3057 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3058 case_WLAN(DISASSOC_AP_BUSY); 3059 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3060 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3061 case_WLAN(DISASSOC_STA_HAS_LEFT); 3062 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3063 case_WLAN(DISASSOC_BAD_POWER); 3064 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3065 case_WLAN(INVALID_IE); 3066 case_WLAN(MIC_FAILURE); 3067 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3068 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3069 case_WLAN(IE_DIFFERENT); 3070 case_WLAN(INVALID_GROUP_CIPHER); 3071 case_WLAN(INVALID_PAIRWISE_CIPHER); 3072 case_WLAN(INVALID_AKMP); 3073 case_WLAN(UNSUPP_RSN_VERSION); 3074 case_WLAN(INVALID_RSN_IE_CAP); 3075 case_WLAN(IEEE8021X_FAILED); 3076 case_WLAN(CIPHER_SUITE_REJECTED); 3077 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3078 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3079 case_WLAN(DISASSOC_LOW_ACK); 3080 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3081 case_WLAN(QSTA_LEAVE_QBSS); 3082 case_WLAN(QSTA_NOT_USE); 3083 case_WLAN(QSTA_REQUIRE_SETUP); 3084 case_WLAN(QSTA_TIMEOUT); 3085 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3086 case_WLAN(MESH_PEER_CANCELED); 3087 case_WLAN(MESH_MAX_PEERS); 3088 case_WLAN(MESH_CONFIG); 3089 case_WLAN(MESH_CLOSE); 3090 case_WLAN(MESH_MAX_RETRIES); 3091 case_WLAN(MESH_CONFIRM_TIMEOUT); 3092 case_WLAN(MESH_INVALID_GTK); 3093 case_WLAN(MESH_INCONSISTENT_PARAM); 3094 case_WLAN(MESH_INVALID_SECURITY); 3095 case_WLAN(MESH_PATH_ERROR); 3096 case_WLAN(MESH_PATH_NOFORWARD); 3097 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3098 case_WLAN(MAC_EXISTS_IN_MBSS); 3099 case_WLAN(MESH_CHAN_REGULATORY); 3100 case_WLAN(MESH_CHAN); 3101 default: return "<unknown>"; 3102 } 3103 } 3104 3105 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3106 struct ieee80211_mgmt *mgmt, size_t len) 3107 { 3108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3109 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3110 3111 sdata_assert_lock(sdata); 3112 3113 if (len < 24 + 2) 3114 return; 3115 3116 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3117 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3118 return; 3119 } 3120 3121 if (ifmgd->associated && 3122 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3123 const u8 *bssid = ifmgd->associated->bssid; 3124 3125 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3126 bssid, reason_code, 3127 ieee80211_get_reason_code_string(reason_code)); 3128 3129 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3130 3131 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3132 reason_code, false); 3133 return; 3134 } 3135 3136 if (ifmgd->assoc_data && 3137 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3138 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3139 3140 sdata_info(sdata, 3141 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3142 bssid, reason_code, 3143 ieee80211_get_reason_code_string(reason_code)); 3144 3145 ieee80211_destroy_assoc_data(sdata, false, true); 3146 3147 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3148 return; 3149 } 3150 } 3151 3152 3153 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3154 struct ieee80211_mgmt *mgmt, size_t len) 3155 { 3156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3157 u16 reason_code; 3158 3159 sdata_assert_lock(sdata); 3160 3161 if (len < 24 + 2) 3162 return; 3163 3164 if (!ifmgd->associated || 3165 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3166 return; 3167 3168 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3169 3170 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3171 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3172 return; 3173 } 3174 3175 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3176 mgmt->sa, reason_code, 3177 ieee80211_get_reason_code_string(reason_code)); 3178 3179 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3180 3181 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3182 false); 3183 } 3184 3185 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3186 u8 *supp_rates, unsigned int supp_rates_len, 3187 u32 *rates, u32 *basic_rates, 3188 bool *have_higher_than_11mbit, 3189 int *min_rate, int *min_rate_index, 3190 int shift) 3191 { 3192 int i, j; 3193 3194 for (i = 0; i < supp_rates_len; i++) { 3195 int rate = supp_rates[i] & 0x7f; 3196 bool is_basic = !!(supp_rates[i] & 0x80); 3197 3198 if ((rate * 5 * (1 << shift)) > 110) 3199 *have_higher_than_11mbit = true; 3200 3201 /* 3202 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3203 * since they're not rates. 3204 * 3205 * Note: Even though the membership selector and the basic 3206 * rate flag share the same bit, they are not exactly 3207 * the same. 3208 */ 3209 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3210 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3211 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3212 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3213 continue; 3214 3215 for (j = 0; j < sband->n_bitrates; j++) { 3216 struct ieee80211_rate *br; 3217 int brate; 3218 3219 br = &sband->bitrates[j]; 3220 3221 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3222 if (brate == rate) { 3223 *rates |= BIT(j); 3224 if (is_basic) 3225 *basic_rates |= BIT(j); 3226 if ((rate * 5) < *min_rate) { 3227 *min_rate = rate * 5; 3228 *min_rate_index = j; 3229 } 3230 break; 3231 } 3232 } 3233 } 3234 } 3235 3236 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3237 const struct ieee802_11_elems *elems) 3238 { 3239 if (elems->ext_capab_len < 10) 3240 return false; 3241 3242 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3243 return false; 3244 3245 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3246 IEEE80211_HE_MAC_CAP0_TWT_RES; 3247 } 3248 3249 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3250 struct sta_info *sta, 3251 struct ieee802_11_elems *elems) 3252 { 3253 bool twt = ieee80211_twt_req_supported(sta, elems); 3254 3255 if (sdata->vif.bss_conf.twt_requester != twt) { 3256 sdata->vif.bss_conf.twt_requester = twt; 3257 return BSS_CHANGED_TWT; 3258 } 3259 return 0; 3260 } 3261 3262 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3263 struct ieee80211_bss_conf *bss_conf, 3264 struct ieee80211_supported_band *sband, 3265 struct sta_info *sta) 3266 { 3267 const struct ieee80211_sta_he_cap *own_he_cap = 3268 ieee80211_get_he_iftype_cap(sband, 3269 ieee80211_vif_type_p2p(&sdata->vif)); 3270 3271 return bss_conf->he_support && 3272 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3273 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3274 own_he_cap && 3275 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3276 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3277 } 3278 3279 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3280 struct cfg80211_bss *cbss, 3281 struct ieee80211_mgmt *mgmt, size_t len, 3282 struct ieee802_11_elems *elems) 3283 { 3284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3285 struct ieee80211_local *local = sdata->local; 3286 struct ieee80211_supported_band *sband; 3287 struct sta_info *sta; 3288 u16 capab_info, aid; 3289 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3290 const struct cfg80211_bss_ies *bss_ies = NULL; 3291 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3292 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3293 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3294 u32 changed = 0; 3295 u8 *pos; 3296 int err; 3297 bool ret; 3298 3299 /* AssocResp and ReassocResp have identical structure */ 3300 3301 pos = mgmt->u.assoc_resp.variable; 3302 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3303 if (is_s1g) { 3304 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3305 aid = 0; /* TODO */ 3306 } 3307 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3308 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3309 mgmt->bssid, assoc_data->bss->bssid); 3310 3311 if (!elems) 3312 return false; 3313 3314 if (elems->aid_resp) 3315 aid = le16_to_cpu(elems->aid_resp->aid); 3316 3317 /* 3318 * The 5 MSB of the AID field are reserved 3319 * (802.11-2016 9.4.1.8 AID field) 3320 */ 3321 aid &= 0x7ff; 3322 3323 ifmgd->broken_ap = false; 3324 3325 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3326 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3327 aid); 3328 aid = 0; 3329 ifmgd->broken_ap = true; 3330 } 3331 3332 if (!is_s1g && !elems->supp_rates) { 3333 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3334 ret = false; 3335 goto out; 3336 } 3337 3338 sdata->vif.bss_conf.aid = aid; 3339 ifmgd->tdls_chan_switch_prohibited = 3340 elems->ext_capab && elems->ext_capab_len >= 5 && 3341 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3342 3343 /* 3344 * Some APs are erroneously not including some information in their 3345 * (re)association response frames. Try to recover by using the data 3346 * from the beacon or probe response. This seems to afflict mobile 3347 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3348 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3349 */ 3350 if (!is_6ghz && 3351 ((assoc_data->wmm && !elems->wmm_param) || 3352 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3353 (!elems->ht_cap_elem || !elems->ht_operation)) || 3354 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3355 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3356 const struct cfg80211_bss_ies *ies; 3357 struct ieee802_11_elems *bss_elems; 3358 3359 rcu_read_lock(); 3360 ies = rcu_dereference(cbss->ies); 3361 if (ies) 3362 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3363 GFP_ATOMIC); 3364 rcu_read_unlock(); 3365 if (!bss_ies) { 3366 ret = false; 3367 goto out; 3368 } 3369 3370 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3371 false, mgmt->bssid, 3372 assoc_data->bss->bssid); 3373 if (!bss_elems) { 3374 ret = false; 3375 goto out; 3376 } 3377 3378 if (assoc_data->wmm && 3379 !elems->wmm_param && bss_elems->wmm_param) { 3380 elems->wmm_param = bss_elems->wmm_param; 3381 sdata_info(sdata, 3382 "AP bug: WMM param missing from AssocResp\n"); 3383 } 3384 3385 /* 3386 * Also check if we requested HT/VHT, otherwise the AP doesn't 3387 * have to include the IEs in the (re)association response. 3388 */ 3389 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3390 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3391 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3392 sdata_info(sdata, 3393 "AP bug: HT capability missing from AssocResp\n"); 3394 } 3395 if (!elems->ht_operation && bss_elems->ht_operation && 3396 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3397 elems->ht_operation = bss_elems->ht_operation; 3398 sdata_info(sdata, 3399 "AP bug: HT operation missing from AssocResp\n"); 3400 } 3401 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3402 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3403 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3404 sdata_info(sdata, 3405 "AP bug: VHT capa missing from AssocResp\n"); 3406 } 3407 if (!elems->vht_operation && bss_elems->vht_operation && 3408 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3409 elems->vht_operation = bss_elems->vht_operation; 3410 sdata_info(sdata, 3411 "AP bug: VHT operation missing from AssocResp\n"); 3412 } 3413 3414 kfree(bss_elems); 3415 } 3416 3417 /* 3418 * We previously checked these in the beacon/probe response, so 3419 * they should be present here. This is just a safety net. 3420 */ 3421 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3422 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3423 sdata_info(sdata, 3424 "HT AP is missing WMM params or HT capability/operation\n"); 3425 ret = false; 3426 goto out; 3427 } 3428 3429 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3430 (!elems->vht_cap_elem || !elems->vht_operation)) { 3431 sdata_info(sdata, 3432 "VHT AP is missing VHT capability/operation\n"); 3433 ret = false; 3434 goto out; 3435 } 3436 3437 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3438 !elems->he_6ghz_capa) { 3439 sdata_info(sdata, 3440 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3441 ret = false; 3442 goto out; 3443 } 3444 3445 mutex_lock(&sdata->local->sta_mtx); 3446 /* 3447 * station info was already allocated and inserted before 3448 * the association and should be available to us 3449 */ 3450 sta = sta_info_get(sdata, cbss->bssid); 3451 if (WARN_ON(!sta)) { 3452 mutex_unlock(&sdata->local->sta_mtx); 3453 ret = false; 3454 goto out; 3455 } 3456 3457 sband = ieee80211_get_sband(sdata); 3458 if (!sband) { 3459 mutex_unlock(&sdata->local->sta_mtx); 3460 ret = false; 3461 goto out; 3462 } 3463 3464 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3465 (!elems->he_cap || !elems->he_operation)) { 3466 mutex_unlock(&sdata->local->sta_mtx); 3467 sdata_info(sdata, 3468 "HE AP is missing HE capability/operation\n"); 3469 ret = false; 3470 goto out; 3471 } 3472 3473 /* Set up internal HT/VHT capabilities */ 3474 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3475 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3476 elems->ht_cap_elem, sta); 3477 3478 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3479 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3480 elems->vht_cap_elem, sta); 3481 3482 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3483 elems->he_cap) { 3484 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3485 elems->he_cap, 3486 elems->he_cap_len, 3487 elems->he_6ghz_capa, 3488 sta); 3489 3490 bss_conf->he_support = sta->sta.he_cap.has_he; 3491 if (elems->rsnx && elems->rsnx_len && 3492 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3493 wiphy_ext_feature_isset(local->hw.wiphy, 3494 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3495 bss_conf->twt_protected = true; 3496 else 3497 bss_conf->twt_protected = false; 3498 3499 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3500 } else { 3501 bss_conf->he_support = false; 3502 bss_conf->twt_requester = false; 3503 bss_conf->twt_protected = false; 3504 } 3505 3506 bss_conf->twt_broadcast = 3507 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3508 3509 if (bss_conf->he_support) { 3510 bss_conf->he_bss_color.color = 3511 le32_get_bits(elems->he_operation->he_oper_params, 3512 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3513 bss_conf->he_bss_color.partial = 3514 le32_get_bits(elems->he_operation->he_oper_params, 3515 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3516 bss_conf->he_bss_color.enabled = 3517 !le32_get_bits(elems->he_operation->he_oper_params, 3518 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3519 3520 if (bss_conf->he_bss_color.enabled) 3521 changed |= BSS_CHANGED_HE_BSS_COLOR; 3522 3523 bss_conf->htc_trig_based_pkt_ext = 3524 le32_get_bits(elems->he_operation->he_oper_params, 3525 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3526 bss_conf->frame_time_rts_th = 3527 le32_get_bits(elems->he_operation->he_oper_params, 3528 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3529 3530 bss_conf->uora_exists = !!elems->uora_element; 3531 if (elems->uora_element) 3532 bss_conf->uora_ocw_range = elems->uora_element[0]; 3533 3534 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3535 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3536 /* TODO: OPEN: what happens if BSS color disable is set? */ 3537 } 3538 3539 if (cbss->transmitted_bss) { 3540 bss_conf->nontransmitted = true; 3541 ether_addr_copy(bss_conf->transmitter_bssid, 3542 cbss->transmitted_bss->bssid); 3543 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3544 bss_conf->bssid_index = cbss->bssid_index; 3545 } 3546 3547 /* 3548 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3549 * in their association response, so ignore that data for our own 3550 * configuration. If it changed since the last beacon, we'll get the 3551 * next beacon and update then. 3552 */ 3553 3554 /* 3555 * If an operating mode notification IE is present, override the 3556 * NSS calculation (that would be done in rate_control_rate_init()) 3557 * and use the # of streams from that element. 3558 */ 3559 if (elems->opmode_notif && 3560 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3561 u8 nss; 3562 3563 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3564 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3565 nss += 1; 3566 sta->sta.rx_nss = nss; 3567 } 3568 3569 rate_control_rate_init(sta); 3570 3571 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3572 set_sta_flag(sta, WLAN_STA_MFP); 3573 sta->sta.mfp = true; 3574 } else { 3575 sta->sta.mfp = false; 3576 } 3577 3578 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3579 local->hw.queues >= IEEE80211_NUM_ACS; 3580 3581 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3582 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3583 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3584 if (err) { 3585 sdata_info(sdata, 3586 "failed to move station %pM to desired state\n", 3587 sta->sta.addr); 3588 WARN_ON(__sta_info_destroy(sta)); 3589 mutex_unlock(&sdata->local->sta_mtx); 3590 ret = false; 3591 goto out; 3592 } 3593 3594 if (sdata->wdev.use_4addr) 3595 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3596 3597 mutex_unlock(&sdata->local->sta_mtx); 3598 3599 /* 3600 * Always handle WMM once after association regardless 3601 * of the first value the AP uses. Setting -1 here has 3602 * that effect because the AP values is an unsigned 3603 * 4-bit value. 3604 */ 3605 ifmgd->wmm_last_param_set = -1; 3606 ifmgd->mu_edca_last_param_set = -1; 3607 3608 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3609 ieee80211_set_wmm_default(sdata, false, false); 3610 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3611 elems->wmm_param_len, 3612 elems->mu_edca_param_set)) { 3613 /* still enable QoS since we might have HT/VHT */ 3614 ieee80211_set_wmm_default(sdata, false, true); 3615 /* set the disable-WMM flag in this case to disable 3616 * tracking WMM parameter changes in the beacon if 3617 * the parameters weren't actually valid. Doing so 3618 * avoids changing parameters very strangely when 3619 * the AP is going back and forth between valid and 3620 * invalid parameters. 3621 */ 3622 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3623 } 3624 changed |= BSS_CHANGED_QOS; 3625 3626 if (elems->max_idle_period_ie) { 3627 bss_conf->max_idle_period = 3628 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3629 bss_conf->protected_keep_alive = 3630 !!(elems->max_idle_period_ie->idle_options & 3631 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3632 changed |= BSS_CHANGED_KEEP_ALIVE; 3633 } else { 3634 bss_conf->max_idle_period = 0; 3635 bss_conf->protected_keep_alive = false; 3636 } 3637 3638 /* set assoc capability (AID was already set earlier), 3639 * ieee80211_set_associated() will tell the driver */ 3640 bss_conf->assoc_capability = capab_info; 3641 ieee80211_set_associated(sdata, cbss, changed); 3642 3643 /* 3644 * If we're using 4-addr mode, let the AP know that we're 3645 * doing so, so that it can create the STA VLAN on its side 3646 */ 3647 if (ifmgd->use_4addr) 3648 ieee80211_send_4addr_nullfunc(local, sdata); 3649 3650 /* 3651 * Start timer to probe the connection to the AP now. 3652 * Also start the timer that will detect beacon loss. 3653 */ 3654 ieee80211_sta_reset_beacon_monitor(sdata); 3655 ieee80211_sta_reset_conn_monitor(sdata); 3656 3657 ret = true; 3658 out: 3659 kfree(elems); 3660 kfree(bss_ies); 3661 return ret; 3662 } 3663 3664 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3665 struct ieee80211_mgmt *mgmt, 3666 size_t len) 3667 { 3668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3669 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3670 u16 capab_info, status_code, aid; 3671 struct ieee802_11_elems *elems; 3672 int ac, uapsd_queues = -1; 3673 u8 *pos; 3674 bool reassoc; 3675 struct cfg80211_bss *cbss; 3676 struct ieee80211_event event = { 3677 .type = MLME_EVENT, 3678 .u.mlme.data = ASSOC_EVENT, 3679 }; 3680 struct ieee80211_prep_tx_info info = {}; 3681 3682 sdata_assert_lock(sdata); 3683 3684 if (!assoc_data) 3685 return; 3686 3687 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3688 return; 3689 3690 cbss = assoc_data->bss; 3691 3692 /* 3693 * AssocResp and ReassocResp have identical structure, so process both 3694 * of them in this function. 3695 */ 3696 3697 if (len < 24 + 6) 3698 return; 3699 3700 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3701 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3702 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3703 pos = mgmt->u.assoc_resp.variable; 3704 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3705 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3706 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3707 aid = 0; /* TODO */ 3708 } 3709 3710 /* 3711 * Note: this may not be perfect, AP might misbehave - if 3712 * anyone needs to rely on perfect complete notification 3713 * with the exact right subtype, then we need to track what 3714 * we actually transmitted. 3715 */ 3716 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3717 IEEE80211_STYPE_ASSOC_REQ; 3718 3719 sdata_info(sdata, 3720 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3721 reassoc ? "Rea" : "A", mgmt->sa, 3722 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3723 3724 if (assoc_data->fils_kek_len && 3725 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3726 return; 3727 3728 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3729 mgmt->bssid, assoc_data->bss->bssid); 3730 if (!elems) 3731 goto notify_driver; 3732 3733 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3734 elems->timeout_int && 3735 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3736 u32 tu, ms; 3737 tu = le32_to_cpu(elems->timeout_int->value); 3738 ms = tu * 1024 / 1000; 3739 sdata_info(sdata, 3740 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3741 mgmt->sa, tu, ms); 3742 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3743 assoc_data->timeout_started = true; 3744 if (ms > IEEE80211_ASSOC_TIMEOUT) 3745 run_again(sdata, assoc_data->timeout); 3746 goto notify_driver; 3747 } 3748 3749 if (status_code != WLAN_STATUS_SUCCESS) { 3750 sdata_info(sdata, "%pM denied association (code=%d)\n", 3751 mgmt->sa, status_code); 3752 ieee80211_destroy_assoc_data(sdata, false, false); 3753 event.u.mlme.status = MLME_DENIED; 3754 event.u.mlme.reason = status_code; 3755 drv_event_callback(sdata->local, sdata, &event); 3756 } else { 3757 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3758 /* oops -- internal error -- send timeout for now */ 3759 ieee80211_destroy_assoc_data(sdata, false, false); 3760 cfg80211_assoc_timeout(sdata->dev, cbss); 3761 goto notify_driver; 3762 } 3763 event.u.mlme.status = MLME_SUCCESS; 3764 drv_event_callback(sdata->local, sdata, &event); 3765 sdata_info(sdata, "associated\n"); 3766 3767 /* 3768 * destroy assoc_data afterwards, as otherwise an idle 3769 * recalc after assoc_data is NULL but before associated 3770 * is set can cause the interface to go idle 3771 */ 3772 ieee80211_destroy_assoc_data(sdata, true, false); 3773 3774 /* get uapsd queues configuration */ 3775 uapsd_queues = 0; 3776 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3777 if (sdata->tx_conf[ac].uapsd) 3778 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3779 3780 info.success = 1; 3781 } 3782 3783 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3784 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3785 notify_driver: 3786 drv_mgd_complete_tx(sdata->local, sdata, &info); 3787 kfree(elems); 3788 } 3789 3790 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3791 struct ieee80211_mgmt *mgmt, size_t len, 3792 struct ieee80211_rx_status *rx_status) 3793 { 3794 struct ieee80211_local *local = sdata->local; 3795 struct ieee80211_bss *bss; 3796 struct ieee80211_channel *channel; 3797 3798 sdata_assert_lock(sdata); 3799 3800 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3801 ieee80211_rx_status_to_khz(rx_status)); 3802 if (!channel) 3803 return; 3804 3805 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3806 if (bss) { 3807 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3808 ieee80211_rx_bss_put(local, bss); 3809 } 3810 } 3811 3812 3813 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3814 struct sk_buff *skb) 3815 { 3816 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3817 struct ieee80211_if_managed *ifmgd; 3818 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3819 struct ieee80211_channel *channel; 3820 size_t baselen, len = skb->len; 3821 3822 ifmgd = &sdata->u.mgd; 3823 3824 sdata_assert_lock(sdata); 3825 3826 /* 3827 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3828 * "If a 6 GHz AP receives a Probe Request frame and responds with 3829 * a Probe Response frame [..], the Address 1 field of the Probe 3830 * Response frame shall be set to the broadcast address [..]" 3831 * So, on 6GHz band we should also accept broadcast responses. 3832 */ 3833 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3834 rx_status->freq); 3835 if (!channel) 3836 return; 3837 3838 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3839 (channel->band != NL80211_BAND_6GHZ || 3840 !is_broadcast_ether_addr(mgmt->da))) 3841 return; /* ignore ProbeResp to foreign address */ 3842 3843 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3844 if (baselen > len) 3845 return; 3846 3847 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3848 3849 if (ifmgd->associated && 3850 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3851 ieee80211_reset_ap_probe(sdata); 3852 } 3853 3854 /* 3855 * This is the canonical list of information elements we care about, 3856 * the filter code also gives us all changes to the Microsoft OUI 3857 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3858 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3859 * changes to requested client power. 3860 * 3861 * We implement beacon filtering in software since that means we can 3862 * avoid processing the frame here and in cfg80211, and userspace 3863 * will not be able to tell whether the hardware supports it or not. 3864 * 3865 * XXX: This list needs to be dynamic -- userspace needs to be able to 3866 * add items it requires. It also needs to be able to tell us to 3867 * look out for other vendor IEs. 3868 */ 3869 static const u64 care_about_ies = 3870 (1ULL << WLAN_EID_COUNTRY) | 3871 (1ULL << WLAN_EID_ERP_INFO) | 3872 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3873 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3874 (1ULL << WLAN_EID_HT_CAPABILITY) | 3875 (1ULL << WLAN_EID_HT_OPERATION) | 3876 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3877 3878 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3879 struct ieee80211_if_managed *ifmgd, 3880 struct ieee80211_bss_conf *bss_conf, 3881 struct ieee80211_local *local, 3882 struct ieee80211_rx_status *rx_status) 3883 { 3884 /* Track average RSSI from the Beacon frames of the current AP */ 3885 3886 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3887 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3888 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3889 ifmgd->last_cqm_event_signal = 0; 3890 ifmgd->count_beacon_signal = 1; 3891 ifmgd->last_ave_beacon_signal = 0; 3892 } else { 3893 ifmgd->count_beacon_signal++; 3894 } 3895 3896 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3897 3898 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3899 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3900 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3901 int last_sig = ifmgd->last_ave_beacon_signal; 3902 struct ieee80211_event event = { 3903 .type = RSSI_EVENT, 3904 }; 3905 3906 /* 3907 * if signal crosses either of the boundaries, invoke callback 3908 * with appropriate parameters 3909 */ 3910 if (sig > ifmgd->rssi_max_thold && 3911 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3912 ifmgd->last_ave_beacon_signal = sig; 3913 event.u.rssi.data = RSSI_EVENT_HIGH; 3914 drv_event_callback(local, sdata, &event); 3915 } else if (sig < ifmgd->rssi_min_thold && 3916 (last_sig >= ifmgd->rssi_max_thold || 3917 last_sig == 0)) { 3918 ifmgd->last_ave_beacon_signal = sig; 3919 event.u.rssi.data = RSSI_EVENT_LOW; 3920 drv_event_callback(local, sdata, &event); 3921 } 3922 } 3923 3924 if (bss_conf->cqm_rssi_thold && 3925 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3926 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3927 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3928 int last_event = ifmgd->last_cqm_event_signal; 3929 int thold = bss_conf->cqm_rssi_thold; 3930 int hyst = bss_conf->cqm_rssi_hyst; 3931 3932 if (sig < thold && 3933 (last_event == 0 || sig < last_event - hyst)) { 3934 ifmgd->last_cqm_event_signal = sig; 3935 ieee80211_cqm_rssi_notify( 3936 &sdata->vif, 3937 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3938 sig, GFP_KERNEL); 3939 } else if (sig > thold && 3940 (last_event == 0 || sig > last_event + hyst)) { 3941 ifmgd->last_cqm_event_signal = sig; 3942 ieee80211_cqm_rssi_notify( 3943 &sdata->vif, 3944 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3945 sig, GFP_KERNEL); 3946 } 3947 } 3948 3949 if (bss_conf->cqm_rssi_low && 3950 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3951 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3952 int last_event = ifmgd->last_cqm_event_signal; 3953 int low = bss_conf->cqm_rssi_low; 3954 int high = bss_conf->cqm_rssi_high; 3955 3956 if (sig < low && 3957 (last_event == 0 || last_event >= low)) { 3958 ifmgd->last_cqm_event_signal = sig; 3959 ieee80211_cqm_rssi_notify( 3960 &sdata->vif, 3961 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3962 sig, GFP_KERNEL); 3963 } else if (sig > high && 3964 (last_event == 0 || last_event <= high)) { 3965 ifmgd->last_cqm_event_signal = sig; 3966 ieee80211_cqm_rssi_notify( 3967 &sdata->vif, 3968 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3969 sig, GFP_KERNEL); 3970 } 3971 } 3972 } 3973 3974 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3975 struct cfg80211_bss *bss) 3976 { 3977 if (ether_addr_equal(tx_bssid, bss->bssid)) 3978 return true; 3979 if (!bss->transmitted_bss) 3980 return false; 3981 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3982 } 3983 3984 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3985 struct ieee80211_hdr *hdr, size_t len, 3986 struct ieee80211_rx_status *rx_status) 3987 { 3988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3989 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3990 struct ieee80211_mgmt *mgmt = (void *) hdr; 3991 size_t baselen; 3992 struct ieee802_11_elems *elems; 3993 struct ieee80211_local *local = sdata->local; 3994 struct ieee80211_chanctx_conf *chanctx_conf; 3995 struct ieee80211_channel *chan; 3996 struct sta_info *sta; 3997 u32 changed = 0; 3998 bool erp_valid; 3999 u8 erp_value = 0; 4000 u32 ncrc = 0; 4001 u8 *bssid, *variable = mgmt->u.beacon.variable; 4002 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4003 4004 sdata_assert_lock(sdata); 4005 4006 /* Process beacon from the current BSS */ 4007 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4008 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4009 struct ieee80211_ext *ext = (void *) mgmt; 4010 4011 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4012 variable = ext->u.s1g_short_beacon.variable; 4013 else 4014 variable = ext->u.s1g_beacon.variable; 4015 } 4016 4017 baselen = (u8 *) variable - (u8 *) mgmt; 4018 if (baselen > len) 4019 return; 4020 4021 rcu_read_lock(); 4022 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4023 if (!chanctx_conf) { 4024 rcu_read_unlock(); 4025 return; 4026 } 4027 4028 if (ieee80211_rx_status_to_khz(rx_status) != 4029 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4030 rcu_read_unlock(); 4031 return; 4032 } 4033 chan = chanctx_conf->def.chan; 4034 rcu_read_unlock(); 4035 4036 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4037 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4038 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4039 bssid, 4040 ifmgd->assoc_data->bss->bssid); 4041 if (!elems) 4042 return; 4043 4044 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4045 4046 if (elems->dtim_period) 4047 ifmgd->dtim_period = elems->dtim_period; 4048 ifmgd->have_beacon = true; 4049 ifmgd->assoc_data->need_beacon = false; 4050 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4051 sdata->vif.bss_conf.sync_tsf = 4052 le64_to_cpu(mgmt->u.beacon.timestamp); 4053 sdata->vif.bss_conf.sync_device_ts = 4054 rx_status->device_timestamp; 4055 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4056 } 4057 4058 if (elems->mbssid_config_ie) 4059 bss_conf->profile_periodicity = 4060 elems->mbssid_config_ie->profile_periodicity; 4061 else 4062 bss_conf->profile_periodicity = 0; 4063 4064 if (elems->ext_capab_len >= 11 && 4065 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4066 bss_conf->ema_ap = true; 4067 else 4068 bss_conf->ema_ap = false; 4069 4070 /* continue assoc process */ 4071 ifmgd->assoc_data->timeout = jiffies; 4072 ifmgd->assoc_data->timeout_started = true; 4073 run_again(sdata, ifmgd->assoc_data->timeout); 4074 kfree(elems); 4075 return; 4076 } 4077 4078 if (!ifmgd->associated || 4079 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4080 return; 4081 bssid = ifmgd->associated->bssid; 4082 4083 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4084 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4085 local, rx_status); 4086 4087 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4088 mlme_dbg_ratelimited(sdata, 4089 "cancelling AP probe due to a received beacon\n"); 4090 ieee80211_reset_ap_probe(sdata); 4091 } 4092 4093 /* 4094 * Push the beacon loss detection into the future since 4095 * we are processing a beacon from the AP just now. 4096 */ 4097 ieee80211_sta_reset_beacon_monitor(sdata); 4098 4099 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4100 * element (which carries the beacon interval). Don't forget to add a 4101 * bit to care_about_ies[] above if mac80211 is interested in a 4102 * changing S1G element. 4103 */ 4104 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4105 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4106 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4107 false, care_about_ies, ncrc, 4108 mgmt->bssid, bssid); 4109 if (!elems) 4110 return; 4111 ncrc = elems->crc; 4112 4113 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4114 ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { 4115 if (local->hw.conf.dynamic_ps_timeout > 0) { 4116 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4117 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4118 ieee80211_hw_config(local, 4119 IEEE80211_CONF_CHANGE_PS); 4120 } 4121 ieee80211_send_nullfunc(local, sdata, false); 4122 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4123 local->pspolling = true; 4124 4125 /* 4126 * Here is assumed that the driver will be 4127 * able to send ps-poll frame and receive a 4128 * response even though power save mode is 4129 * enabled, but some drivers might require 4130 * to disable power save here. This needs 4131 * to be investigated. 4132 */ 4133 ieee80211_send_pspoll(local, sdata); 4134 } 4135 } 4136 4137 if (sdata->vif.p2p || 4138 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4139 struct ieee80211_p2p_noa_attr noa = {}; 4140 int ret; 4141 4142 ret = cfg80211_get_p2p_attr(variable, 4143 len - baselen, 4144 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4145 (u8 *) &noa, sizeof(noa)); 4146 if (ret >= 2) { 4147 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4148 /* valid noa_attr and index changed */ 4149 sdata->u.mgd.p2p_noa_index = noa.index; 4150 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4151 changed |= BSS_CHANGED_P2P_PS; 4152 /* 4153 * make sure we update all information, the CRC 4154 * mechanism doesn't look at P2P attributes. 4155 */ 4156 ifmgd->beacon_crc_valid = false; 4157 } 4158 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4159 /* noa_attr not found and we had valid noa_attr before */ 4160 sdata->u.mgd.p2p_noa_index = -1; 4161 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4162 changed |= BSS_CHANGED_P2P_PS; 4163 ifmgd->beacon_crc_valid = false; 4164 } 4165 } 4166 4167 if (ifmgd->csa_waiting_bcn) 4168 ieee80211_chswitch_post_beacon(sdata); 4169 4170 /* 4171 * Update beacon timing and dtim count on every beacon appearance. This 4172 * will allow the driver to use the most updated values. Do it before 4173 * comparing this one with last received beacon. 4174 * IMPORTANT: These parameters would possibly be out of sync by the time 4175 * the driver will use them. The synchronized view is currently 4176 * guaranteed only in certain callbacks. 4177 */ 4178 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4179 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4180 sdata->vif.bss_conf.sync_tsf = 4181 le64_to_cpu(mgmt->u.beacon.timestamp); 4182 sdata->vif.bss_conf.sync_device_ts = 4183 rx_status->device_timestamp; 4184 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4185 } 4186 4187 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4188 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4189 goto free; 4190 ifmgd->beacon_crc = ncrc; 4191 ifmgd->beacon_crc_valid = true; 4192 4193 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4194 4195 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4196 rx_status->device_timestamp, 4197 elems, true); 4198 4199 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4200 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4201 elems->wmm_param_len, 4202 elems->mu_edca_param_set)) 4203 changed |= BSS_CHANGED_QOS; 4204 4205 /* 4206 * If we haven't had a beacon before, tell the driver about the 4207 * DTIM period (and beacon timing if desired) now. 4208 */ 4209 if (!ifmgd->have_beacon) { 4210 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4211 bss_conf->dtim_period = elems->dtim_period ?: 1; 4212 4213 changed |= BSS_CHANGED_BEACON_INFO; 4214 ifmgd->have_beacon = true; 4215 4216 mutex_lock(&local->iflist_mtx); 4217 ieee80211_recalc_ps(local); 4218 mutex_unlock(&local->iflist_mtx); 4219 4220 ieee80211_recalc_ps_vif(sdata); 4221 } 4222 4223 if (elems->erp_info) { 4224 erp_valid = true; 4225 erp_value = elems->erp_info[0]; 4226 } else { 4227 erp_valid = false; 4228 } 4229 4230 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4231 changed |= ieee80211_handle_bss_capability(sdata, 4232 le16_to_cpu(mgmt->u.beacon.capab_info), 4233 erp_valid, erp_value); 4234 4235 mutex_lock(&local->sta_mtx); 4236 sta = sta_info_get(sdata, bssid); 4237 4238 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4239 4240 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4241 elems->vht_cap_elem, elems->ht_operation, 4242 elems->vht_operation, elems->he_operation, 4243 elems->s1g_oper, bssid, &changed)) { 4244 mutex_unlock(&local->sta_mtx); 4245 sdata_info(sdata, 4246 "failed to follow AP %pM bandwidth change, disconnect\n", 4247 bssid); 4248 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4249 WLAN_REASON_DEAUTH_LEAVING, 4250 true, deauth_buf); 4251 ieee80211_report_disconnect(sdata, deauth_buf, 4252 sizeof(deauth_buf), true, 4253 WLAN_REASON_DEAUTH_LEAVING, 4254 false); 4255 goto free; 4256 } 4257 4258 if (sta && elems->opmode_notif) 4259 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, 4260 rx_status->band); 4261 mutex_unlock(&local->sta_mtx); 4262 4263 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4264 elems->country_elem, 4265 elems->country_elem_len, 4266 elems->pwr_constr_elem, 4267 elems->cisco_dtpc_elem); 4268 4269 ieee80211_bss_info_change_notify(sdata, changed); 4270 free: 4271 kfree(elems); 4272 } 4273 4274 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4275 struct sk_buff *skb) 4276 { 4277 struct ieee80211_rx_status *rx_status; 4278 struct ieee80211_hdr *hdr; 4279 u16 fc; 4280 4281 rx_status = (struct ieee80211_rx_status *) skb->cb; 4282 hdr = (struct ieee80211_hdr *) skb->data; 4283 fc = le16_to_cpu(hdr->frame_control); 4284 4285 sdata_lock(sdata); 4286 switch (fc & IEEE80211_FCTL_STYPE) { 4287 case IEEE80211_STYPE_S1G_BEACON: 4288 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4289 break; 4290 } 4291 sdata_unlock(sdata); 4292 } 4293 4294 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4295 struct sk_buff *skb) 4296 { 4297 struct ieee80211_rx_status *rx_status; 4298 struct ieee80211_mgmt *mgmt; 4299 u16 fc; 4300 int ies_len; 4301 4302 rx_status = (struct ieee80211_rx_status *) skb->cb; 4303 mgmt = (struct ieee80211_mgmt *) skb->data; 4304 fc = le16_to_cpu(mgmt->frame_control); 4305 4306 sdata_lock(sdata); 4307 4308 switch (fc & IEEE80211_FCTL_STYPE) { 4309 case IEEE80211_STYPE_BEACON: 4310 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4311 skb->len, rx_status); 4312 break; 4313 case IEEE80211_STYPE_PROBE_RESP: 4314 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4315 break; 4316 case IEEE80211_STYPE_AUTH: 4317 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4318 break; 4319 case IEEE80211_STYPE_DEAUTH: 4320 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4321 break; 4322 case IEEE80211_STYPE_DISASSOC: 4323 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4324 break; 4325 case IEEE80211_STYPE_ASSOC_RESP: 4326 case IEEE80211_STYPE_REASSOC_RESP: 4327 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4328 break; 4329 case IEEE80211_STYPE_ACTION: 4330 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4331 struct ieee802_11_elems *elems; 4332 4333 ies_len = skb->len - 4334 offsetof(struct ieee80211_mgmt, 4335 u.action.u.chan_switch.variable); 4336 4337 if (ies_len < 0) 4338 break; 4339 4340 /* CSA IE cannot be overridden, no need for BSSID */ 4341 elems = ieee802_11_parse_elems( 4342 mgmt->u.action.u.chan_switch.variable, 4343 ies_len, true, mgmt->bssid, NULL); 4344 4345 if (elems && !elems->parse_error) 4346 ieee80211_sta_process_chanswitch(sdata, 4347 rx_status->mactime, 4348 rx_status->device_timestamp, 4349 elems, false); 4350 kfree(elems); 4351 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4352 struct ieee802_11_elems *elems; 4353 4354 ies_len = skb->len - 4355 offsetof(struct ieee80211_mgmt, 4356 u.action.u.ext_chan_switch.variable); 4357 4358 if (ies_len < 0) 4359 break; 4360 4361 /* 4362 * extended CSA IE can't be overridden, no need for 4363 * BSSID 4364 */ 4365 elems = ieee802_11_parse_elems( 4366 mgmt->u.action.u.ext_chan_switch.variable, 4367 ies_len, true, mgmt->bssid, NULL); 4368 4369 if (elems && !elems->parse_error) { 4370 /* for the handling code pretend it was an IE */ 4371 elems->ext_chansw_ie = 4372 &mgmt->u.action.u.ext_chan_switch.data; 4373 4374 ieee80211_sta_process_chanswitch(sdata, 4375 rx_status->mactime, 4376 rx_status->device_timestamp, 4377 elems, false); 4378 } 4379 4380 kfree(elems); 4381 } 4382 break; 4383 } 4384 sdata_unlock(sdata); 4385 } 4386 4387 static void ieee80211_sta_timer(struct timer_list *t) 4388 { 4389 struct ieee80211_sub_if_data *sdata = 4390 from_timer(sdata, t, u.mgd.timer); 4391 4392 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4393 } 4394 4395 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4396 u8 *bssid, u8 reason, bool tx) 4397 { 4398 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4399 4400 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4401 tx, frame_buf); 4402 4403 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4404 reason, false); 4405 } 4406 4407 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4408 { 4409 struct ieee80211_local *local = sdata->local; 4410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4411 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4412 u32 tx_flags = 0; 4413 u16 trans = 1; 4414 u16 status = 0; 4415 struct ieee80211_prep_tx_info info = { 4416 .subtype = IEEE80211_STYPE_AUTH, 4417 }; 4418 4419 sdata_assert_lock(sdata); 4420 4421 if (WARN_ON_ONCE(!auth_data)) 4422 return -EINVAL; 4423 4424 auth_data->tries++; 4425 4426 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4427 sdata_info(sdata, "authentication with %pM timed out\n", 4428 auth_data->bss->bssid); 4429 4430 /* 4431 * Most likely AP is not in the range so remove the 4432 * bss struct for that AP. 4433 */ 4434 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4435 4436 return -ETIMEDOUT; 4437 } 4438 4439 if (auth_data->algorithm == WLAN_AUTH_SAE) 4440 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4441 4442 drv_mgd_prepare_tx(local, sdata, &info); 4443 4444 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4445 auth_data->bss->bssid, auth_data->tries, 4446 IEEE80211_AUTH_MAX_TRIES); 4447 4448 auth_data->expected_transaction = 2; 4449 4450 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4451 trans = auth_data->sae_trans; 4452 status = auth_data->sae_status; 4453 auth_data->expected_transaction = trans; 4454 } 4455 4456 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4457 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4458 IEEE80211_TX_INTFL_MLME_CONN_TX; 4459 4460 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4461 auth_data->data, auth_data->data_len, 4462 auth_data->bss->bssid, 4463 auth_data->bss->bssid, NULL, 0, 0, 4464 tx_flags); 4465 4466 if (tx_flags == 0) { 4467 if (auth_data->algorithm == WLAN_AUTH_SAE) 4468 auth_data->timeout = jiffies + 4469 IEEE80211_AUTH_TIMEOUT_SAE; 4470 else 4471 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4472 } else { 4473 auth_data->timeout = 4474 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4475 } 4476 4477 auth_data->timeout_started = true; 4478 run_again(sdata, auth_data->timeout); 4479 4480 return 0; 4481 } 4482 4483 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4484 { 4485 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4486 struct ieee80211_local *local = sdata->local; 4487 4488 sdata_assert_lock(sdata); 4489 4490 assoc_data->tries++; 4491 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4492 sdata_info(sdata, "association with %pM timed out\n", 4493 assoc_data->bss->bssid); 4494 4495 /* 4496 * Most likely AP is not in the range so remove the 4497 * bss struct for that AP. 4498 */ 4499 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4500 4501 return -ETIMEDOUT; 4502 } 4503 4504 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4505 assoc_data->bss->bssid, assoc_data->tries, 4506 IEEE80211_ASSOC_MAX_TRIES); 4507 ieee80211_send_assoc(sdata); 4508 4509 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4510 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4511 assoc_data->timeout_started = true; 4512 run_again(sdata, assoc_data->timeout); 4513 } else { 4514 assoc_data->timeout = 4515 round_jiffies_up(jiffies + 4516 IEEE80211_ASSOC_TIMEOUT_LONG); 4517 assoc_data->timeout_started = true; 4518 run_again(sdata, assoc_data->timeout); 4519 } 4520 4521 return 0; 4522 } 4523 4524 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4525 __le16 fc, bool acked) 4526 { 4527 struct ieee80211_local *local = sdata->local; 4528 4529 sdata->u.mgd.status_fc = fc; 4530 sdata->u.mgd.status_acked = acked; 4531 sdata->u.mgd.status_received = true; 4532 4533 ieee80211_queue_work(&local->hw, &sdata->work); 4534 } 4535 4536 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4537 { 4538 struct ieee80211_local *local = sdata->local; 4539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4540 4541 sdata_lock(sdata); 4542 4543 if (ifmgd->status_received) { 4544 __le16 fc = ifmgd->status_fc; 4545 bool status_acked = ifmgd->status_acked; 4546 4547 ifmgd->status_received = false; 4548 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4549 if (status_acked) { 4550 if (ifmgd->auth_data->algorithm == 4551 WLAN_AUTH_SAE) 4552 ifmgd->auth_data->timeout = 4553 jiffies + 4554 IEEE80211_AUTH_TIMEOUT_SAE; 4555 else 4556 ifmgd->auth_data->timeout = 4557 jiffies + 4558 IEEE80211_AUTH_TIMEOUT_SHORT; 4559 run_again(sdata, ifmgd->auth_data->timeout); 4560 } else { 4561 ifmgd->auth_data->timeout = jiffies - 1; 4562 } 4563 ifmgd->auth_data->timeout_started = true; 4564 } else if (ifmgd->assoc_data && 4565 (ieee80211_is_assoc_req(fc) || 4566 ieee80211_is_reassoc_req(fc))) { 4567 if (status_acked) { 4568 ifmgd->assoc_data->timeout = 4569 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4570 run_again(sdata, ifmgd->assoc_data->timeout); 4571 } else { 4572 ifmgd->assoc_data->timeout = jiffies - 1; 4573 } 4574 ifmgd->assoc_data->timeout_started = true; 4575 } 4576 } 4577 4578 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4579 time_after(jiffies, ifmgd->auth_data->timeout)) { 4580 if (ifmgd->auth_data->done) { 4581 /* 4582 * ok ... we waited for assoc but userspace didn't, 4583 * so let's just kill the auth data 4584 */ 4585 ieee80211_destroy_auth_data(sdata, false); 4586 } else if (ieee80211_auth(sdata)) { 4587 u8 bssid[ETH_ALEN]; 4588 struct ieee80211_event event = { 4589 .type = MLME_EVENT, 4590 .u.mlme.data = AUTH_EVENT, 4591 .u.mlme.status = MLME_TIMEOUT, 4592 }; 4593 4594 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4595 4596 ieee80211_destroy_auth_data(sdata, false); 4597 4598 cfg80211_auth_timeout(sdata->dev, bssid); 4599 drv_event_callback(sdata->local, sdata, &event); 4600 } 4601 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4602 run_again(sdata, ifmgd->auth_data->timeout); 4603 4604 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4605 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4606 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4607 ieee80211_do_assoc(sdata)) { 4608 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4609 struct ieee80211_event event = { 4610 .type = MLME_EVENT, 4611 .u.mlme.data = ASSOC_EVENT, 4612 .u.mlme.status = MLME_TIMEOUT, 4613 }; 4614 4615 ieee80211_destroy_assoc_data(sdata, false, false); 4616 cfg80211_assoc_timeout(sdata->dev, bss); 4617 drv_event_callback(sdata->local, sdata, &event); 4618 } 4619 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4620 run_again(sdata, ifmgd->assoc_data->timeout); 4621 4622 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4623 ifmgd->associated) { 4624 u8 bssid[ETH_ALEN]; 4625 int max_tries; 4626 4627 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4628 4629 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4630 max_tries = max_nullfunc_tries; 4631 else 4632 max_tries = max_probe_tries; 4633 4634 /* ACK received for nullfunc probing frame */ 4635 if (!ifmgd->probe_send_count) 4636 ieee80211_reset_ap_probe(sdata); 4637 else if (ifmgd->nullfunc_failed) { 4638 if (ifmgd->probe_send_count < max_tries) { 4639 mlme_dbg(sdata, 4640 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4641 bssid, ifmgd->probe_send_count, 4642 max_tries); 4643 ieee80211_mgd_probe_ap_send(sdata); 4644 } else { 4645 mlme_dbg(sdata, 4646 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4647 bssid); 4648 ieee80211_sta_connection_lost(sdata, bssid, 4649 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4650 false); 4651 } 4652 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4653 run_again(sdata, ifmgd->probe_timeout); 4654 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4655 mlme_dbg(sdata, 4656 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4657 bssid, probe_wait_ms); 4658 ieee80211_sta_connection_lost(sdata, bssid, 4659 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4660 } else if (ifmgd->probe_send_count < max_tries) { 4661 mlme_dbg(sdata, 4662 "No probe response from AP %pM after %dms, try %d/%i\n", 4663 bssid, probe_wait_ms, 4664 ifmgd->probe_send_count, max_tries); 4665 ieee80211_mgd_probe_ap_send(sdata); 4666 } else { 4667 /* 4668 * We actually lost the connection ... or did we? 4669 * Let's make sure! 4670 */ 4671 mlme_dbg(sdata, 4672 "No probe response from AP %pM after %dms, disconnecting.\n", 4673 bssid, probe_wait_ms); 4674 4675 ieee80211_sta_connection_lost(sdata, bssid, 4676 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4677 } 4678 } 4679 4680 sdata_unlock(sdata); 4681 } 4682 4683 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4684 { 4685 struct ieee80211_sub_if_data *sdata = 4686 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4688 4689 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4690 return; 4691 4692 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4693 return; 4694 4695 sdata->u.mgd.connection_loss = false; 4696 ieee80211_queue_work(&sdata->local->hw, 4697 &sdata->u.mgd.beacon_connection_loss_work); 4698 } 4699 4700 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4701 { 4702 struct ieee80211_sub_if_data *sdata = 4703 from_timer(sdata, t, u.mgd.conn_mon_timer); 4704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4705 struct ieee80211_local *local = sdata->local; 4706 struct sta_info *sta; 4707 unsigned long timeout; 4708 4709 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4710 return; 4711 4712 sta = sta_info_get(sdata, ifmgd->bssid); 4713 if (!sta) 4714 return; 4715 4716 timeout = sta->status_stats.last_ack; 4717 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4718 timeout = sta->rx_stats.last_rx; 4719 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4720 4721 /* If timeout is after now, then update timer to fire at 4722 * the later date, but do not actually probe at this time. 4723 */ 4724 if (time_is_after_jiffies(timeout)) { 4725 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4726 return; 4727 } 4728 4729 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4730 } 4731 4732 static void ieee80211_sta_monitor_work(struct work_struct *work) 4733 { 4734 struct ieee80211_sub_if_data *sdata = 4735 container_of(work, struct ieee80211_sub_if_data, 4736 u.mgd.monitor_work); 4737 4738 ieee80211_mgd_probe_ap(sdata, false); 4739 } 4740 4741 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4742 { 4743 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4744 __ieee80211_stop_poll(sdata); 4745 4746 /* let's probe the connection once */ 4747 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4748 ieee80211_queue_work(&sdata->local->hw, 4749 &sdata->u.mgd.monitor_work); 4750 } 4751 } 4752 4753 #ifdef CONFIG_PM 4754 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4755 { 4756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4757 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4758 4759 sdata_lock(sdata); 4760 4761 if (ifmgd->auth_data || ifmgd->assoc_data) { 4762 const u8 *bssid = ifmgd->auth_data ? 4763 ifmgd->auth_data->bss->bssid : 4764 ifmgd->assoc_data->bss->bssid; 4765 4766 /* 4767 * If we are trying to authenticate / associate while suspending, 4768 * cfg80211 won't know and won't actually abort those attempts, 4769 * thus we need to do that ourselves. 4770 */ 4771 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4772 IEEE80211_STYPE_DEAUTH, 4773 WLAN_REASON_DEAUTH_LEAVING, 4774 false, frame_buf); 4775 if (ifmgd->assoc_data) 4776 ieee80211_destroy_assoc_data(sdata, false, true); 4777 if (ifmgd->auth_data) 4778 ieee80211_destroy_auth_data(sdata, false); 4779 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4780 IEEE80211_DEAUTH_FRAME_LEN, 4781 false); 4782 } 4783 4784 /* This is a bit of a hack - we should find a better and more generic 4785 * solution to this. Normally when suspending, cfg80211 will in fact 4786 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4787 * auth (not so important) or assoc (this is the problem) process. 4788 * 4789 * As a consequence, it can happen that we are in the process of both 4790 * associating and suspending, and receive an association response 4791 * after cfg80211 has checked if it needs to disconnect, but before 4792 * we actually set the flag to drop incoming frames. This will then 4793 * cause the workqueue flush to process the association response in 4794 * the suspend, resulting in a successful association just before it 4795 * tries to remove the interface from the driver, which now though 4796 * has a channel context assigned ... this results in issues. 4797 * 4798 * To work around this (for now) simply deauth here again if we're 4799 * now connected. 4800 */ 4801 if (ifmgd->associated && !sdata->local->wowlan) { 4802 u8 bssid[ETH_ALEN]; 4803 struct cfg80211_deauth_request req = { 4804 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4805 .bssid = bssid, 4806 }; 4807 4808 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4809 ieee80211_mgd_deauth(sdata, &req); 4810 } 4811 4812 sdata_unlock(sdata); 4813 } 4814 4815 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4816 { 4817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4818 4819 sdata_lock(sdata); 4820 if (!ifmgd->associated) { 4821 sdata_unlock(sdata); 4822 return; 4823 } 4824 4825 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4826 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4827 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4828 ieee80211_sta_connection_lost(sdata, 4829 ifmgd->associated->bssid, 4830 WLAN_REASON_UNSPECIFIED, 4831 true); 4832 sdata_unlock(sdata); 4833 return; 4834 } 4835 sdata_unlock(sdata); 4836 } 4837 #endif 4838 4839 /* interface setup */ 4840 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4841 { 4842 struct ieee80211_if_managed *ifmgd; 4843 4844 ifmgd = &sdata->u.mgd; 4845 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4846 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4847 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4848 ieee80211_beacon_connection_loss_work); 4849 INIT_WORK(&ifmgd->csa_connection_drop_work, 4850 ieee80211_csa_connection_drop_work); 4851 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4852 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4853 ieee80211_tdls_peer_del_work); 4854 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4855 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4856 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4857 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4858 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4859 ieee80211_sta_handle_tspec_ac_params_wk); 4860 4861 ifmgd->flags = 0; 4862 ifmgd->powersave = sdata->wdev.ps; 4863 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4864 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4865 ifmgd->p2p_noa_index = -1; 4866 4867 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4868 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4869 else 4870 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4871 4872 /* Setup TDLS data */ 4873 spin_lock_init(&ifmgd->teardown_lock); 4874 ifmgd->teardown_skb = NULL; 4875 ifmgd->orig_teardown_skb = NULL; 4876 } 4877 4878 /* scan finished notification */ 4879 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4880 { 4881 struct ieee80211_sub_if_data *sdata; 4882 4883 /* Restart STA timers */ 4884 rcu_read_lock(); 4885 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4886 if (ieee80211_sdata_running(sdata)) 4887 ieee80211_restart_sta_timer(sdata); 4888 } 4889 rcu_read_unlock(); 4890 } 4891 4892 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4893 struct cfg80211_bss *cbss) 4894 { 4895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4896 const u8 *ht_cap_ie, *vht_cap_ie; 4897 const struct ieee80211_ht_cap *ht_cap; 4898 const struct ieee80211_vht_cap *vht_cap; 4899 u8 chains = 1; 4900 4901 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4902 return chains; 4903 4904 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4905 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4906 ht_cap = (void *)(ht_cap_ie + 2); 4907 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4908 /* 4909 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4910 * "Tx Unequal Modulation Supported" fields. 4911 */ 4912 } 4913 4914 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4915 return chains; 4916 4917 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4918 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4919 u8 nss; 4920 u16 tx_mcs_map; 4921 4922 vht_cap = (void *)(vht_cap_ie + 2); 4923 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4924 for (nss = 8; nss > 0; nss--) { 4925 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4926 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4927 break; 4928 } 4929 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4930 chains = max(chains, nss); 4931 } 4932 4933 return chains; 4934 } 4935 4936 static bool 4937 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4938 struct ieee80211_supported_band *sband, 4939 const struct ieee80211_he_operation *he_op) 4940 { 4941 const struct ieee80211_sta_he_cap *sta_he_cap = 4942 ieee80211_get_he_iftype_cap(sband, 4943 ieee80211_vif_type_p2p(&sdata->vif)); 4944 u16 ap_min_req_set; 4945 int i; 4946 4947 if (!sta_he_cap || !he_op) 4948 return false; 4949 4950 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4951 4952 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4953 for (i = 0; i < 3; i++) { 4954 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4955 &sta_he_cap->he_mcs_nss_supp; 4956 u16 sta_mcs_map_rx = 4957 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4958 u16 sta_mcs_map_tx = 4959 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4960 u8 nss; 4961 bool verified = true; 4962 4963 /* 4964 * For each band there is a maximum of 8 spatial streams 4965 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4966 * of 2 bits per NSS (1-8), with the values defined in enum 4967 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4968 * capabilities aren't less than the AP's minimum requirements 4969 * for this HE BSS per SS. 4970 * It is enough to find one such band that meets the reqs. 4971 */ 4972 for (nss = 8; nss > 0; nss--) { 4973 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4974 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4975 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4976 4977 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4978 continue; 4979 4980 /* 4981 * Make sure the HE AP doesn't require MCSs that aren't 4982 * supported by the client 4983 */ 4984 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4985 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4986 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4987 verified = false; 4988 break; 4989 } 4990 } 4991 4992 if (verified) 4993 return true; 4994 } 4995 4996 /* If here, STA doesn't meet AP's HE min requirements */ 4997 return false; 4998 } 4999 5000 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5001 struct cfg80211_bss *cbss) 5002 { 5003 struct ieee80211_local *local = sdata->local; 5004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5005 const struct ieee80211_ht_cap *ht_cap = NULL; 5006 const struct ieee80211_ht_operation *ht_oper = NULL; 5007 const struct ieee80211_vht_operation *vht_oper = NULL; 5008 const struct ieee80211_he_operation *he_oper = NULL; 5009 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5010 struct ieee80211_supported_band *sband; 5011 struct cfg80211_chan_def chandef; 5012 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5013 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5014 struct ieee80211_bss *bss = (void *)cbss->priv; 5015 struct ieee802_11_elems *elems; 5016 const struct cfg80211_bss_ies *ies; 5017 int ret; 5018 u32 i; 5019 bool have_80mhz; 5020 5021 rcu_read_lock(); 5022 5023 ies = rcu_dereference(cbss->ies); 5024 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5025 NULL, NULL); 5026 if (!elems) { 5027 rcu_read_unlock(); 5028 return -ENOMEM; 5029 } 5030 5031 sband = local->hw.wiphy->bands[cbss->channel->band]; 5032 5033 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5034 IEEE80211_STA_DISABLE_80P80MHZ | 5035 IEEE80211_STA_DISABLE_160MHZ); 5036 5037 /* disable HT/VHT/HE if we don't support them */ 5038 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5039 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5040 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5041 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5042 } 5043 5044 if (!sband->vht_cap.vht_supported && is_5ghz) { 5045 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5046 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5047 } 5048 5049 if (!ieee80211_get_he_iftype_cap(sband, 5050 ieee80211_vif_type_p2p(&sdata->vif))) 5051 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5052 5053 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5054 ht_oper = elems->ht_operation; 5055 ht_cap = elems->ht_cap_elem; 5056 5057 if (!ht_cap) { 5058 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5059 ht_oper = NULL; 5060 } 5061 } 5062 5063 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5064 vht_oper = elems->vht_operation; 5065 if (vht_oper && !ht_oper) { 5066 vht_oper = NULL; 5067 sdata_info(sdata, 5068 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5069 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5070 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5071 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5072 } 5073 5074 if (!elems->vht_cap_elem) { 5075 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5076 vht_oper = NULL; 5077 } 5078 } 5079 5080 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5081 he_oper = elems->he_operation; 5082 5083 if (is_6ghz) { 5084 struct ieee80211_bss_conf *bss_conf; 5085 u8 i, j = 0; 5086 5087 bss_conf = &sdata->vif.bss_conf; 5088 5089 if (elems->pwr_constr_elem) 5090 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5091 5092 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5093 ARRAY_SIZE(elems->tx_pwr_env)); 5094 5095 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5096 if (elems->tx_pwr_env_len[i] > 5097 sizeof(bss_conf->tx_pwr_env[j])) 5098 continue; 5099 5100 bss_conf->tx_pwr_env_num++; 5101 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5102 elems->tx_pwr_env_len[i]); 5103 j++; 5104 } 5105 } 5106 5107 if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5108 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5109 } 5110 5111 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5112 have_80mhz = false; 5113 for (i = 0; i < sband->n_channels; i++) { 5114 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5115 IEEE80211_CHAN_NO_80MHZ)) 5116 continue; 5117 5118 have_80mhz = true; 5119 break; 5120 } 5121 5122 if (!have_80mhz) 5123 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5124 5125 if (sband->band == NL80211_BAND_S1GHZ) { 5126 s1g_oper = elems->s1g_oper; 5127 if (!s1g_oper) 5128 sdata_info(sdata, 5129 "AP missing S1G operation element?\n"); 5130 } 5131 5132 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5133 cbss->channel, 5134 bss->vht_cap_info, 5135 ht_oper, vht_oper, he_oper, 5136 s1g_oper, 5137 &chandef, false); 5138 5139 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5140 local->rx_chains); 5141 5142 rcu_read_unlock(); 5143 /* the element data was RCU protected so no longer valid anyway */ 5144 kfree(elems); 5145 elems = NULL; 5146 5147 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5148 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5149 return -EINVAL; 5150 } 5151 5152 /* will change later if needed */ 5153 sdata->smps_mode = IEEE80211_SMPS_OFF; 5154 5155 mutex_lock(&local->mtx); 5156 /* 5157 * If this fails (possibly due to channel context sharing 5158 * on incompatible channels, e.g. 80+80 and 160 sharing the 5159 * same control channel) try to use a smaller bandwidth. 5160 */ 5161 ret = ieee80211_vif_use_channel(sdata, &chandef, 5162 IEEE80211_CHANCTX_SHARED); 5163 5164 /* don't downgrade for 5 and 10 MHz channels, though. */ 5165 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5166 chandef.width == NL80211_CHAN_WIDTH_10) 5167 goto out; 5168 5169 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5170 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5171 ret = ieee80211_vif_use_channel(sdata, &chandef, 5172 IEEE80211_CHANCTX_SHARED); 5173 } 5174 out: 5175 mutex_unlock(&local->mtx); 5176 return ret; 5177 } 5178 5179 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5180 u8 *dtim_count, u8 *dtim_period) 5181 { 5182 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5183 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5184 ies->len); 5185 const struct ieee80211_tim_ie *tim = NULL; 5186 const struct ieee80211_bssid_index *idx; 5187 bool valid = tim_ie && tim_ie[1] >= 2; 5188 5189 if (valid) 5190 tim = (void *)(tim_ie + 2); 5191 5192 if (dtim_count) 5193 *dtim_count = valid ? tim->dtim_count : 0; 5194 5195 if (dtim_period) 5196 *dtim_period = valid ? tim->dtim_period : 0; 5197 5198 /* Check if value is overridden by non-transmitted profile */ 5199 if (!idx_ie || idx_ie[1] < 3) 5200 return valid; 5201 5202 idx = (void *)(idx_ie + 2); 5203 5204 if (dtim_count) 5205 *dtim_count = idx->dtim_count; 5206 5207 if (dtim_period) 5208 *dtim_period = idx->dtim_period; 5209 5210 return true; 5211 } 5212 5213 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5214 struct cfg80211_bss *cbss, bool assoc, 5215 bool override) 5216 { 5217 struct ieee80211_local *local = sdata->local; 5218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5219 struct ieee80211_bss *bss = (void *)cbss->priv; 5220 struct sta_info *new_sta = NULL; 5221 struct ieee80211_supported_band *sband; 5222 bool have_sta = false; 5223 int err; 5224 5225 sband = local->hw.wiphy->bands[cbss->channel->band]; 5226 5227 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5228 return -EINVAL; 5229 5230 /* If a reconfig is happening, bail out */ 5231 if (local->in_reconfig) 5232 return -EBUSY; 5233 5234 if (assoc) { 5235 rcu_read_lock(); 5236 have_sta = sta_info_get(sdata, cbss->bssid); 5237 rcu_read_unlock(); 5238 } 5239 5240 if (!have_sta) { 5241 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5242 if (!new_sta) 5243 return -ENOMEM; 5244 } 5245 5246 /* 5247 * Set up the information for the new channel before setting the 5248 * new channel. We can't - completely race-free - change the basic 5249 * rates bitmap and the channel (sband) that it refers to, but if 5250 * we set it up before we at least avoid calling into the driver's 5251 * bss_info_changed() method with invalid information (since we do 5252 * call that from changing the channel - only for IDLE and perhaps 5253 * some others, but ...). 5254 * 5255 * So to avoid that, just set up all the new information before the 5256 * channel, but tell the driver to apply it only afterwards, since 5257 * it might need the new channel for that. 5258 */ 5259 if (new_sta) { 5260 u32 rates = 0, basic_rates = 0; 5261 bool have_higher_than_11mbit; 5262 int min_rate = INT_MAX, min_rate_index = -1; 5263 const struct cfg80211_bss_ies *ies; 5264 int shift = ieee80211_vif_get_shift(&sdata->vif); 5265 5266 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5267 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5268 ieee80211_s1g_sta_rate_init(new_sta); 5269 goto skip_rates; 5270 } 5271 5272 ieee80211_get_rates(sband, bss->supp_rates, 5273 bss->supp_rates_len, 5274 &rates, &basic_rates, 5275 &have_higher_than_11mbit, 5276 &min_rate, &min_rate_index, 5277 shift); 5278 5279 /* 5280 * This used to be a workaround for basic rates missing 5281 * in the association response frame. Now that we no 5282 * longer use the basic rates from there, it probably 5283 * doesn't happen any more, but keep the workaround so 5284 * in case some *other* APs are buggy in different ways 5285 * we can connect -- with a warning. 5286 * Allow this workaround only in case the AP provided at least 5287 * one rate. 5288 */ 5289 if (min_rate_index < 0) { 5290 sdata_info(sdata, 5291 "No legacy rates in association response\n"); 5292 5293 sta_info_free(local, new_sta); 5294 return -EINVAL; 5295 } else if (!basic_rates) { 5296 sdata_info(sdata, 5297 "No basic rates, using min rate instead\n"); 5298 basic_rates = BIT(min_rate_index); 5299 } 5300 5301 if (rates) 5302 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5303 else 5304 sdata_info(sdata, 5305 "No rates found, keeping mandatory only\n"); 5306 5307 sdata->vif.bss_conf.basic_rates = basic_rates; 5308 5309 /* cf. IEEE 802.11 9.2.12 */ 5310 if (cbss->channel->band == NL80211_BAND_2GHZ && 5311 have_higher_than_11mbit) 5312 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5313 else 5314 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5315 5316 skip_rates: 5317 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5318 5319 /* set timing information */ 5320 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5321 rcu_read_lock(); 5322 ies = rcu_dereference(cbss->beacon_ies); 5323 if (ies) { 5324 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5325 sdata->vif.bss_conf.sync_device_ts = 5326 bss->device_ts_beacon; 5327 5328 ieee80211_get_dtim(ies, 5329 &sdata->vif.bss_conf.sync_dtim_count, 5330 NULL); 5331 } else if (!ieee80211_hw_check(&sdata->local->hw, 5332 TIMING_BEACON_ONLY)) { 5333 ies = rcu_dereference(cbss->proberesp_ies); 5334 /* must be non-NULL since beacon IEs were NULL */ 5335 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5336 sdata->vif.bss_conf.sync_device_ts = 5337 bss->device_ts_presp; 5338 sdata->vif.bss_conf.sync_dtim_count = 0; 5339 } else { 5340 sdata->vif.bss_conf.sync_tsf = 0; 5341 sdata->vif.bss_conf.sync_device_ts = 0; 5342 sdata->vif.bss_conf.sync_dtim_count = 0; 5343 } 5344 rcu_read_unlock(); 5345 } 5346 5347 if (new_sta || override) { 5348 err = ieee80211_prep_channel(sdata, cbss); 5349 if (err) { 5350 if (new_sta) 5351 sta_info_free(local, new_sta); 5352 return -EINVAL; 5353 } 5354 } 5355 5356 if (new_sta) { 5357 /* 5358 * tell driver about BSSID, basic rates and timing 5359 * this was set up above, before setting the channel 5360 */ 5361 ieee80211_bss_info_change_notify(sdata, 5362 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5363 BSS_CHANGED_BEACON_INT); 5364 5365 if (assoc) 5366 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5367 5368 err = sta_info_insert(new_sta); 5369 new_sta = NULL; 5370 if (err) { 5371 sdata_info(sdata, 5372 "failed to insert STA entry for the AP (error %d)\n", 5373 err); 5374 return err; 5375 } 5376 } else 5377 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5378 5379 /* Cancel scan to ensure that nothing interferes with connection */ 5380 if (local->scanning) 5381 ieee80211_scan_cancel(local); 5382 5383 return 0; 5384 } 5385 5386 /* config hooks */ 5387 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5388 struct cfg80211_auth_request *req) 5389 { 5390 struct ieee80211_local *local = sdata->local; 5391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5392 struct ieee80211_mgd_auth_data *auth_data; 5393 u16 auth_alg; 5394 int err; 5395 bool cont_auth; 5396 5397 /* prepare auth data structure */ 5398 5399 switch (req->auth_type) { 5400 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5401 auth_alg = WLAN_AUTH_OPEN; 5402 break; 5403 case NL80211_AUTHTYPE_SHARED_KEY: 5404 if (fips_enabled) 5405 return -EOPNOTSUPP; 5406 auth_alg = WLAN_AUTH_SHARED_KEY; 5407 break; 5408 case NL80211_AUTHTYPE_FT: 5409 auth_alg = WLAN_AUTH_FT; 5410 break; 5411 case NL80211_AUTHTYPE_NETWORK_EAP: 5412 auth_alg = WLAN_AUTH_LEAP; 5413 break; 5414 case NL80211_AUTHTYPE_SAE: 5415 auth_alg = WLAN_AUTH_SAE; 5416 break; 5417 case NL80211_AUTHTYPE_FILS_SK: 5418 auth_alg = WLAN_AUTH_FILS_SK; 5419 break; 5420 case NL80211_AUTHTYPE_FILS_SK_PFS: 5421 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5422 break; 5423 case NL80211_AUTHTYPE_FILS_PK: 5424 auth_alg = WLAN_AUTH_FILS_PK; 5425 break; 5426 default: 5427 return -EOPNOTSUPP; 5428 } 5429 5430 if (ifmgd->assoc_data) 5431 return -EBUSY; 5432 5433 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5434 req->ie_len, GFP_KERNEL); 5435 if (!auth_data) 5436 return -ENOMEM; 5437 5438 auth_data->bss = req->bss; 5439 5440 if (req->auth_data_len >= 4) { 5441 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5442 __le16 *pos = (__le16 *) req->auth_data; 5443 5444 auth_data->sae_trans = le16_to_cpu(pos[0]); 5445 auth_data->sae_status = le16_to_cpu(pos[1]); 5446 } 5447 memcpy(auth_data->data, req->auth_data + 4, 5448 req->auth_data_len - 4); 5449 auth_data->data_len += req->auth_data_len - 4; 5450 } 5451 5452 /* Check if continuing authentication or trying to authenticate with the 5453 * same BSS that we were in the process of authenticating with and avoid 5454 * removal and re-addition of the STA entry in 5455 * ieee80211_prep_connection(). 5456 */ 5457 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5458 5459 if (req->ie && req->ie_len) { 5460 memcpy(&auth_data->data[auth_data->data_len], 5461 req->ie, req->ie_len); 5462 auth_data->data_len += req->ie_len; 5463 } 5464 5465 if (req->key && req->key_len) { 5466 auth_data->key_len = req->key_len; 5467 auth_data->key_idx = req->key_idx; 5468 memcpy(auth_data->key, req->key, req->key_len); 5469 } 5470 5471 auth_data->algorithm = auth_alg; 5472 5473 /* try to authenticate/probe */ 5474 5475 if (ifmgd->auth_data) { 5476 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5477 auth_data->peer_confirmed = 5478 ifmgd->auth_data->peer_confirmed; 5479 } 5480 ieee80211_destroy_auth_data(sdata, cont_auth); 5481 } 5482 5483 /* prep auth_data so we don't go into idle on disassoc */ 5484 ifmgd->auth_data = auth_data; 5485 5486 /* If this is continuation of an ongoing SAE authentication exchange 5487 * (i.e., request to send SAE Confirm) and the peer has already 5488 * confirmed, mark authentication completed since we are about to send 5489 * out SAE Confirm. 5490 */ 5491 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5492 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5493 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5494 5495 if (ifmgd->associated) { 5496 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5497 5498 sdata_info(sdata, 5499 "disconnect from AP %pM for new auth to %pM\n", 5500 ifmgd->associated->bssid, req->bss->bssid); 5501 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5502 WLAN_REASON_UNSPECIFIED, 5503 false, frame_buf); 5504 5505 ieee80211_report_disconnect(sdata, frame_buf, 5506 sizeof(frame_buf), true, 5507 WLAN_REASON_UNSPECIFIED, 5508 false); 5509 } 5510 5511 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5512 5513 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5514 if (err) 5515 goto err_clear; 5516 5517 err = ieee80211_auth(sdata); 5518 if (err) { 5519 sta_info_destroy_addr(sdata, req->bss->bssid); 5520 goto err_clear; 5521 } 5522 5523 /* hold our own reference */ 5524 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5525 return 0; 5526 5527 err_clear: 5528 eth_zero_addr(ifmgd->bssid); 5529 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5530 ifmgd->auth_data = NULL; 5531 mutex_lock(&sdata->local->mtx); 5532 ieee80211_vif_release_channel(sdata); 5533 mutex_unlock(&sdata->local->mtx); 5534 kfree(auth_data); 5535 return err; 5536 } 5537 5538 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5539 struct cfg80211_assoc_request *req) 5540 { 5541 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5542 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5543 struct ieee80211_local *local = sdata->local; 5544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5545 struct ieee80211_bss *bss = (void *)req->bss->priv; 5546 struct ieee80211_mgd_assoc_data *assoc_data; 5547 const struct cfg80211_bss_ies *beacon_ies; 5548 struct ieee80211_supported_band *sband; 5549 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5550 const struct element *ssid_elem, *ht_elem, *vht_elem; 5551 int i, err; 5552 bool override = false; 5553 5554 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5555 if (!assoc_data) 5556 return -ENOMEM; 5557 5558 rcu_read_lock(); 5559 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5560 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5561 rcu_read_unlock(); 5562 kfree(assoc_data); 5563 return -EINVAL; 5564 } 5565 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5566 assoc_data->ssid_len = ssid_elem->datalen; 5567 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5568 bss_conf->ssid_len = assoc_data->ssid_len; 5569 rcu_read_unlock(); 5570 5571 if (ifmgd->associated) { 5572 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5573 5574 sdata_info(sdata, 5575 "disconnect from AP %pM for new assoc to %pM\n", 5576 ifmgd->associated->bssid, req->bss->bssid); 5577 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5578 WLAN_REASON_UNSPECIFIED, 5579 false, frame_buf); 5580 5581 ieee80211_report_disconnect(sdata, frame_buf, 5582 sizeof(frame_buf), true, 5583 WLAN_REASON_UNSPECIFIED, 5584 false); 5585 } 5586 5587 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5588 err = -EBUSY; 5589 goto err_free; 5590 } 5591 5592 if (ifmgd->assoc_data) { 5593 err = -EBUSY; 5594 goto err_free; 5595 } 5596 5597 if (ifmgd->auth_data) { 5598 bool match; 5599 5600 /* keep sta info, bssid if matching */ 5601 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5602 ieee80211_destroy_auth_data(sdata, match); 5603 } 5604 5605 /* prepare assoc data */ 5606 5607 ifmgd->beacon_crc_valid = false; 5608 5609 assoc_data->wmm = bss->wmm_used && 5610 (local->hw.queues >= IEEE80211_NUM_ACS); 5611 5612 /* 5613 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5614 * We still associate in non-HT mode (11a/b/g) if any one of these 5615 * ciphers is configured as pairwise. 5616 * We can set this to true for non-11n hardware, that'll be checked 5617 * separately along with the peer capabilities. 5618 */ 5619 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5620 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5621 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5622 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5623 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5624 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5625 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5626 netdev_info(sdata->dev, 5627 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5628 } 5629 } 5630 5631 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5632 5633 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5634 if (!bss->wmm_used) { 5635 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5636 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5637 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5638 netdev_info(sdata->dev, 5639 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5640 } 5641 5642 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5643 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5644 sizeof(ifmgd->ht_capa_mask)); 5645 5646 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5647 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5648 sizeof(ifmgd->vht_capa_mask)); 5649 5650 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5651 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5652 sizeof(ifmgd->s1g_capa_mask)); 5653 5654 if (req->ie && req->ie_len) { 5655 memcpy(assoc_data->ie, req->ie, req->ie_len); 5656 assoc_data->ie_len = req->ie_len; 5657 } 5658 5659 if (req->fils_kek) { 5660 /* should already be checked in cfg80211 - so warn */ 5661 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5662 err = -EINVAL; 5663 goto err_free; 5664 } 5665 memcpy(assoc_data->fils_kek, req->fils_kek, 5666 req->fils_kek_len); 5667 assoc_data->fils_kek_len = req->fils_kek_len; 5668 } 5669 5670 if (req->fils_nonces) 5671 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5672 2 * FILS_NONCE_LEN); 5673 5674 assoc_data->bss = req->bss; 5675 assoc_data->capability = req->bss->capability; 5676 assoc_data->supp_rates = bss->supp_rates; 5677 assoc_data->supp_rates_len = bss->supp_rates_len; 5678 5679 rcu_read_lock(); 5680 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 5681 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 5682 assoc_data->ap_ht_param = 5683 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 5684 else if (!is_6ghz) 5685 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5686 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 5687 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) 5688 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 5689 sizeof(struct ieee80211_vht_cap)); 5690 else if (is_5ghz) 5691 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5692 IEEE80211_STA_DISABLE_HE; 5693 rcu_read_unlock(); 5694 5695 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5696 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5697 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5698 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5699 5700 if (bss->wmm_used && bss->uapsd_supported && 5701 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5702 assoc_data->uapsd = true; 5703 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5704 } else { 5705 assoc_data->uapsd = false; 5706 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5707 } 5708 5709 if (req->prev_bssid) 5710 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5711 5712 if (req->use_mfp) { 5713 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5714 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5715 } else { 5716 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5717 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5718 } 5719 5720 if (req->flags & ASSOC_REQ_USE_RRM) 5721 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5722 else 5723 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5724 5725 if (req->crypto.control_port) 5726 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5727 else 5728 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5729 5730 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5731 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5732 sdata->control_port_over_nl80211 = 5733 req->crypto.control_port_over_nl80211; 5734 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5735 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5736 sdata->vif.type); 5737 5738 /* kick off associate process */ 5739 5740 ifmgd->assoc_data = assoc_data; 5741 ifmgd->dtim_period = 0; 5742 ifmgd->have_beacon = false; 5743 5744 /* override HT/VHT configuration only if the AP and we support it */ 5745 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5746 struct ieee80211_sta_ht_cap sta_ht_cap; 5747 5748 if (req->flags & ASSOC_REQ_DISABLE_HT) 5749 override = true; 5750 5751 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5752 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5753 5754 /* check for 40 MHz disable override */ 5755 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5756 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5757 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5758 override = true; 5759 5760 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5761 req->flags & ASSOC_REQ_DISABLE_VHT) 5762 override = true; 5763 } 5764 5765 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5766 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5767 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5768 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5769 } 5770 5771 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5772 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5773 5774 if (req->flags & ASSOC_REQ_DISABLE_HE) 5775 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5776 5777 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5778 if (err) 5779 goto err_clear; 5780 5781 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5782 if (ifmgd->powersave) 5783 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5784 else 5785 sdata->smps_mode = IEEE80211_SMPS_OFF; 5786 } else { 5787 sdata->smps_mode = ifmgd->req_smps; 5788 } 5789 5790 rcu_read_lock(); 5791 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5792 5793 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5794 !beacon_ies) { 5795 /* 5796 * Wait up to one beacon interval ... 5797 * should this be more if we miss one? 5798 */ 5799 sdata_info(sdata, "waiting for beacon from %pM\n", 5800 ifmgd->bssid); 5801 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5802 assoc_data->timeout_started = true; 5803 assoc_data->need_beacon = true; 5804 } else if (beacon_ies) { 5805 const struct element *elem; 5806 u8 dtim_count = 0; 5807 5808 ieee80211_get_dtim(beacon_ies, &dtim_count, 5809 &ifmgd->dtim_period); 5810 5811 ifmgd->have_beacon = true; 5812 assoc_data->timeout = jiffies; 5813 assoc_data->timeout_started = true; 5814 5815 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5816 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5817 sdata->vif.bss_conf.sync_device_ts = 5818 bss->device_ts_beacon; 5819 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5820 } 5821 5822 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5823 beacon_ies->data, beacon_ies->len); 5824 if (elem && elem->datalen >= 3) 5825 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5826 else 5827 sdata->vif.bss_conf.profile_periodicity = 0; 5828 5829 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5830 beacon_ies->data, beacon_ies->len); 5831 if (elem && elem->datalen >= 11 && 5832 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5833 sdata->vif.bss_conf.ema_ap = true; 5834 else 5835 sdata->vif.bss_conf.ema_ap = false; 5836 } else { 5837 assoc_data->timeout = jiffies; 5838 assoc_data->timeout_started = true; 5839 } 5840 rcu_read_unlock(); 5841 5842 run_again(sdata, assoc_data->timeout); 5843 5844 if (bss->corrupt_data) { 5845 char *corrupt_type = "data"; 5846 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5847 if (bss->corrupt_data & 5848 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5849 corrupt_type = "beacon and probe response"; 5850 else 5851 corrupt_type = "beacon"; 5852 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5853 corrupt_type = "probe response"; 5854 sdata_info(sdata, "associating with AP with corrupt %s\n", 5855 corrupt_type); 5856 } 5857 5858 return 0; 5859 err_clear: 5860 eth_zero_addr(ifmgd->bssid); 5861 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5862 ifmgd->assoc_data = NULL; 5863 err_free: 5864 kfree(assoc_data); 5865 return err; 5866 } 5867 5868 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5869 struct cfg80211_deauth_request *req) 5870 { 5871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5872 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5873 bool tx = !req->local_state_change; 5874 struct ieee80211_prep_tx_info info = { 5875 .subtype = IEEE80211_STYPE_DEAUTH, 5876 }; 5877 5878 if (ifmgd->auth_data && 5879 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5880 sdata_info(sdata, 5881 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5882 req->bssid, req->reason_code, 5883 ieee80211_get_reason_code_string(req->reason_code)); 5884 5885 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5886 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5887 IEEE80211_STYPE_DEAUTH, 5888 req->reason_code, tx, 5889 frame_buf); 5890 ieee80211_destroy_auth_data(sdata, false); 5891 ieee80211_report_disconnect(sdata, frame_buf, 5892 sizeof(frame_buf), true, 5893 req->reason_code, false); 5894 drv_mgd_complete_tx(sdata->local, sdata, &info); 5895 return 0; 5896 } 5897 5898 if (ifmgd->assoc_data && 5899 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5900 sdata_info(sdata, 5901 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5902 req->bssid, req->reason_code, 5903 ieee80211_get_reason_code_string(req->reason_code)); 5904 5905 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5906 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5907 IEEE80211_STYPE_DEAUTH, 5908 req->reason_code, tx, 5909 frame_buf); 5910 ieee80211_destroy_assoc_data(sdata, false, true); 5911 ieee80211_report_disconnect(sdata, frame_buf, 5912 sizeof(frame_buf), true, 5913 req->reason_code, false); 5914 return 0; 5915 } 5916 5917 if (ifmgd->associated && 5918 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5919 sdata_info(sdata, 5920 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5921 req->bssid, req->reason_code, 5922 ieee80211_get_reason_code_string(req->reason_code)); 5923 5924 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5925 req->reason_code, tx, frame_buf); 5926 ieee80211_report_disconnect(sdata, frame_buf, 5927 sizeof(frame_buf), true, 5928 req->reason_code, false); 5929 drv_mgd_complete_tx(sdata->local, sdata, &info); 5930 return 0; 5931 } 5932 5933 return -ENOTCONN; 5934 } 5935 5936 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5937 struct cfg80211_disassoc_request *req) 5938 { 5939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5940 u8 bssid[ETH_ALEN]; 5941 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5942 5943 /* 5944 * cfg80211 should catch this ... but it's racy since 5945 * we can receive a disassoc frame, process it, hand it 5946 * to cfg80211 while that's in a locked section already 5947 * trying to tell us that the user wants to disconnect. 5948 */ 5949 if (ifmgd->associated != req->bss) 5950 return -ENOLINK; 5951 5952 sdata_info(sdata, 5953 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5954 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5955 5956 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5957 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5958 req->reason_code, !req->local_state_change, 5959 frame_buf); 5960 5961 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5962 req->reason_code, false); 5963 5964 return 0; 5965 } 5966 5967 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5968 { 5969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5970 5971 /* 5972 * Make sure some work items will not run after this, 5973 * they will not do anything but might not have been 5974 * cancelled when disconnecting. 5975 */ 5976 cancel_work_sync(&ifmgd->monitor_work); 5977 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5978 cancel_work_sync(&ifmgd->request_smps_work); 5979 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5980 cancel_work_sync(&ifmgd->chswitch_work); 5981 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5982 5983 sdata_lock(sdata); 5984 if (ifmgd->assoc_data) { 5985 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5986 ieee80211_destroy_assoc_data(sdata, false, false); 5987 cfg80211_assoc_timeout(sdata->dev, bss); 5988 } 5989 if (ifmgd->auth_data) 5990 ieee80211_destroy_auth_data(sdata, false); 5991 spin_lock_bh(&ifmgd->teardown_lock); 5992 if (ifmgd->teardown_skb) { 5993 kfree_skb(ifmgd->teardown_skb); 5994 ifmgd->teardown_skb = NULL; 5995 ifmgd->orig_teardown_skb = NULL; 5996 } 5997 kfree(ifmgd->assoc_req_ies); 5998 ifmgd->assoc_req_ies = NULL; 5999 ifmgd->assoc_req_ies_len = 0; 6000 spin_unlock_bh(&ifmgd->teardown_lock); 6001 del_timer_sync(&ifmgd->timer); 6002 sdata_unlock(sdata); 6003 } 6004 6005 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6006 enum nl80211_cqm_rssi_threshold_event rssi_event, 6007 s32 rssi_level, 6008 gfp_t gfp) 6009 { 6010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6011 6012 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6013 6014 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6015 } 6016 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6017 6018 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6019 { 6020 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6021 6022 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6023 6024 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6025 } 6026 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6027