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 static 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 chan_increment = 1; 1494 break; 1495 case NL80211_BAND_5GHZ: 1496 chan_increment = 4; 1497 break; 1498 case NL80211_BAND_6GHZ: 1499 /* 1500 * In the 6 GHz band, the "maximum transmit power level" 1501 * field in the triplets is reserved, and thus will be 1502 * zero and we shouldn't use it to control TX power. 1503 * The actual TX power will be given in the transmit 1504 * power envelope element instead. 1505 */ 1506 return false; 1507 } 1508 1509 /* find channel */ 1510 while (country_ie_len >= 3) { 1511 u8 first_channel = triplet->chans.first_channel; 1512 1513 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1514 goto next; 1515 1516 for (i = 0; i < triplet->chans.num_channels; i++) { 1517 if (first_channel + i * chan_increment == chan) { 1518 have_chan_pwr = true; 1519 *chan_pwr = triplet->chans.max_power; 1520 break; 1521 } 1522 } 1523 if (have_chan_pwr) 1524 break; 1525 1526 next: 1527 triplet++; 1528 country_ie_len -= 3; 1529 } 1530 1531 if (have_chan_pwr && pwr_constr_elem) 1532 *pwr_reduction = *pwr_constr_elem; 1533 else 1534 *pwr_reduction = 0; 1535 1536 return have_chan_pwr; 1537 } 1538 1539 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1540 struct ieee80211_channel *channel, 1541 const u8 *cisco_dtpc_ie, 1542 int *pwr_level) 1543 { 1544 /* From practical testing, the first data byte of the DTPC element 1545 * seems to contain the requested dBm level, and the CLI on Cisco 1546 * APs clearly state the range is -127 to 127 dBm, which indicates 1547 * a signed byte, although it seemingly never actually goes negative. 1548 * The other byte seems to always be zero. 1549 */ 1550 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1551 } 1552 1553 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1554 struct ieee80211_channel *channel, 1555 struct ieee80211_mgmt *mgmt, 1556 const u8 *country_ie, u8 country_ie_len, 1557 const u8 *pwr_constr_ie, 1558 const u8 *cisco_dtpc_ie) 1559 { 1560 bool has_80211h_pwr = false, has_cisco_pwr = false; 1561 int chan_pwr = 0, pwr_reduction_80211h = 0; 1562 int pwr_level_cisco, pwr_level_80211h; 1563 int new_ap_level; 1564 __le16 capab = mgmt->u.probe_resp.capab_info; 1565 1566 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1567 return 0; /* TODO */ 1568 1569 if (country_ie && 1570 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1571 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1572 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1573 sdata, channel, country_ie, country_ie_len, 1574 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1575 pwr_level_80211h = 1576 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1577 } 1578 1579 if (cisco_dtpc_ie) { 1580 ieee80211_find_cisco_dtpc( 1581 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1582 has_cisco_pwr = true; 1583 } 1584 1585 if (!has_80211h_pwr && !has_cisco_pwr) 1586 return 0; 1587 1588 /* If we have both 802.11h and Cisco DTPC, apply both limits 1589 * by picking the smallest of the two power levels advertised. 1590 */ 1591 if (has_80211h_pwr && 1592 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1593 new_ap_level = pwr_level_80211h; 1594 1595 if (sdata->ap_power_level == new_ap_level) 1596 return 0; 1597 1598 sdata_dbg(sdata, 1599 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1600 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1601 sdata->u.mgd.bssid); 1602 } else { /* has_cisco_pwr is always true here. */ 1603 new_ap_level = pwr_level_cisco; 1604 1605 if (sdata->ap_power_level == new_ap_level) 1606 return 0; 1607 1608 sdata_dbg(sdata, 1609 "Limiting TX power to %d dBm as advertised by %pM\n", 1610 pwr_level_cisco, sdata->u.mgd.bssid); 1611 } 1612 1613 sdata->ap_power_level = new_ap_level; 1614 if (__ieee80211_recalc_txpower(sdata)) 1615 return BSS_CHANGED_TXPOWER; 1616 return 0; 1617 } 1618 1619 /* powersave */ 1620 static void ieee80211_enable_ps(struct ieee80211_local *local, 1621 struct ieee80211_sub_if_data *sdata) 1622 { 1623 struct ieee80211_conf *conf = &local->hw.conf; 1624 1625 /* 1626 * If we are scanning right now then the parameters will 1627 * take effect when scan finishes. 1628 */ 1629 if (local->scanning) 1630 return; 1631 1632 if (conf->dynamic_ps_timeout > 0 && 1633 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1634 mod_timer(&local->dynamic_ps_timer, jiffies + 1635 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1636 } else { 1637 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1638 ieee80211_send_nullfunc(local, sdata, true); 1639 1640 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1641 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1642 return; 1643 1644 conf->flags |= IEEE80211_CONF_PS; 1645 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1646 } 1647 } 1648 1649 static void ieee80211_change_ps(struct ieee80211_local *local) 1650 { 1651 struct ieee80211_conf *conf = &local->hw.conf; 1652 1653 if (local->ps_sdata) { 1654 ieee80211_enable_ps(local, local->ps_sdata); 1655 } else if (conf->flags & IEEE80211_CONF_PS) { 1656 conf->flags &= ~IEEE80211_CONF_PS; 1657 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1658 del_timer_sync(&local->dynamic_ps_timer); 1659 cancel_work_sync(&local->dynamic_ps_enable_work); 1660 } 1661 } 1662 1663 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1664 { 1665 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1666 struct sta_info *sta = NULL; 1667 bool authorized = false; 1668 1669 if (!mgd->powersave) 1670 return false; 1671 1672 if (mgd->broken_ap) 1673 return false; 1674 1675 if (!mgd->associated) 1676 return false; 1677 1678 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1679 return false; 1680 1681 if (!mgd->have_beacon) 1682 return false; 1683 1684 rcu_read_lock(); 1685 sta = sta_info_get(sdata, mgd->bssid); 1686 if (sta) 1687 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1688 rcu_read_unlock(); 1689 1690 return authorized; 1691 } 1692 1693 /* need to hold RTNL or interface lock */ 1694 void ieee80211_recalc_ps(struct ieee80211_local *local) 1695 { 1696 struct ieee80211_sub_if_data *sdata, *found = NULL; 1697 int count = 0; 1698 int timeout; 1699 1700 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1701 local->ps_sdata = NULL; 1702 return; 1703 } 1704 1705 list_for_each_entry(sdata, &local->interfaces, list) { 1706 if (!ieee80211_sdata_running(sdata)) 1707 continue; 1708 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1709 /* If an AP vif is found, then disable PS 1710 * by setting the count to zero thereby setting 1711 * ps_sdata to NULL. 1712 */ 1713 count = 0; 1714 break; 1715 } 1716 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1717 continue; 1718 found = sdata; 1719 count++; 1720 } 1721 1722 if (count == 1 && ieee80211_powersave_allowed(found)) { 1723 u8 dtimper = found->u.mgd.dtim_period; 1724 1725 timeout = local->dynamic_ps_forced_timeout; 1726 if (timeout < 0) 1727 timeout = 100; 1728 local->hw.conf.dynamic_ps_timeout = timeout; 1729 1730 /* If the TIM IE is invalid, pretend the value is 1 */ 1731 if (!dtimper) 1732 dtimper = 1; 1733 1734 local->hw.conf.ps_dtim_period = dtimper; 1735 local->ps_sdata = found; 1736 } else { 1737 local->ps_sdata = NULL; 1738 } 1739 1740 ieee80211_change_ps(local); 1741 } 1742 1743 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1744 { 1745 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1746 1747 if (sdata->vif.bss_conf.ps != ps_allowed) { 1748 sdata->vif.bss_conf.ps = ps_allowed; 1749 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1750 } 1751 } 1752 1753 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1754 { 1755 struct ieee80211_local *local = 1756 container_of(work, struct ieee80211_local, 1757 dynamic_ps_disable_work); 1758 1759 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1760 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1761 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1762 } 1763 1764 ieee80211_wake_queues_by_reason(&local->hw, 1765 IEEE80211_MAX_QUEUE_MAP, 1766 IEEE80211_QUEUE_STOP_REASON_PS, 1767 false); 1768 } 1769 1770 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1771 { 1772 struct ieee80211_local *local = 1773 container_of(work, struct ieee80211_local, 1774 dynamic_ps_enable_work); 1775 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1776 struct ieee80211_if_managed *ifmgd; 1777 unsigned long flags; 1778 int q; 1779 1780 /* can only happen when PS was just disabled anyway */ 1781 if (!sdata) 1782 return; 1783 1784 ifmgd = &sdata->u.mgd; 1785 1786 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1787 return; 1788 1789 if (local->hw.conf.dynamic_ps_timeout > 0) { 1790 /* don't enter PS if TX frames are pending */ 1791 if (drv_tx_frames_pending(local)) { 1792 mod_timer(&local->dynamic_ps_timer, jiffies + 1793 msecs_to_jiffies( 1794 local->hw.conf.dynamic_ps_timeout)); 1795 return; 1796 } 1797 1798 /* 1799 * transmission can be stopped by others which leads to 1800 * dynamic_ps_timer expiry. Postpone the ps timer if it 1801 * is not the actual idle state. 1802 */ 1803 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1804 for (q = 0; q < local->hw.queues; q++) { 1805 if (local->queue_stop_reasons[q]) { 1806 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1807 flags); 1808 mod_timer(&local->dynamic_ps_timer, jiffies + 1809 msecs_to_jiffies( 1810 local->hw.conf.dynamic_ps_timeout)); 1811 return; 1812 } 1813 } 1814 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1815 } 1816 1817 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1818 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1819 if (drv_tx_frames_pending(local)) { 1820 mod_timer(&local->dynamic_ps_timer, jiffies + 1821 msecs_to_jiffies( 1822 local->hw.conf.dynamic_ps_timeout)); 1823 } else { 1824 ieee80211_send_nullfunc(local, sdata, true); 1825 /* Flush to get the tx status of nullfunc frame */ 1826 ieee80211_flush_queues(local, sdata, false); 1827 } 1828 } 1829 1830 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1831 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1832 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1833 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1834 local->hw.conf.flags |= IEEE80211_CONF_PS; 1835 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1836 } 1837 } 1838 1839 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1840 { 1841 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1842 1843 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1844 } 1845 1846 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1847 { 1848 struct delayed_work *delayed_work = to_delayed_work(work); 1849 struct ieee80211_sub_if_data *sdata = 1850 container_of(delayed_work, struct ieee80211_sub_if_data, 1851 dfs_cac_timer_work); 1852 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1853 1854 mutex_lock(&sdata->local->mtx); 1855 if (sdata->wdev.cac_started) { 1856 ieee80211_vif_release_channel(sdata); 1857 cfg80211_cac_event(sdata->dev, &chandef, 1858 NL80211_RADAR_CAC_FINISHED, 1859 GFP_KERNEL); 1860 } 1861 mutex_unlock(&sdata->local->mtx); 1862 } 1863 1864 static bool 1865 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1866 { 1867 struct ieee80211_local *local = sdata->local; 1868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1869 bool ret = false; 1870 int ac; 1871 1872 if (local->hw.queues < IEEE80211_NUM_ACS) 1873 return false; 1874 1875 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1876 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1877 int non_acm_ac; 1878 unsigned long now = jiffies; 1879 1880 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1881 tx_tspec->admitted_time && 1882 time_after(now, tx_tspec->time_slice_start + HZ)) { 1883 tx_tspec->consumed_tx_time = 0; 1884 tx_tspec->time_slice_start = now; 1885 1886 if (tx_tspec->downgraded) 1887 tx_tspec->action = 1888 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1889 } 1890 1891 switch (tx_tspec->action) { 1892 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1893 /* take the original parameters */ 1894 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1895 sdata_err(sdata, 1896 "failed to set TX queue parameters for queue %d\n", 1897 ac); 1898 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1899 tx_tspec->downgraded = false; 1900 ret = true; 1901 break; 1902 case TX_TSPEC_ACTION_DOWNGRADE: 1903 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1904 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1905 ret = true; 1906 break; 1907 } 1908 /* downgrade next lower non-ACM AC */ 1909 for (non_acm_ac = ac + 1; 1910 non_acm_ac < IEEE80211_NUM_ACS; 1911 non_acm_ac++) 1912 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1913 break; 1914 /* Usually the loop will result in using BK even if it 1915 * requires admission control, but such a configuration 1916 * makes no sense and we have to transmit somehow - the 1917 * AC selection does the same thing. 1918 * If we started out trying to downgrade from BK, then 1919 * the extra condition here might be needed. 1920 */ 1921 if (non_acm_ac >= IEEE80211_NUM_ACS) 1922 non_acm_ac = IEEE80211_AC_BK; 1923 if (drv_conf_tx(local, sdata, ac, 1924 &sdata->tx_conf[non_acm_ac])) 1925 sdata_err(sdata, 1926 "failed to set TX queue parameters for queue %d\n", 1927 ac); 1928 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1929 ret = true; 1930 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1931 tx_tspec->time_slice_start + HZ - now + 1); 1932 break; 1933 case TX_TSPEC_ACTION_NONE: 1934 /* nothing now */ 1935 break; 1936 } 1937 } 1938 1939 return ret; 1940 } 1941 1942 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1943 { 1944 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1945 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1946 } 1947 1948 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1949 { 1950 struct ieee80211_sub_if_data *sdata; 1951 1952 sdata = container_of(work, struct ieee80211_sub_if_data, 1953 u.mgd.tx_tspec_wk.work); 1954 ieee80211_sta_handle_tspec_ac_params(sdata); 1955 } 1956 1957 /* MLME */ 1958 static bool 1959 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1960 struct ieee80211_sub_if_data *sdata, 1961 const u8 *wmm_param, size_t wmm_param_len, 1962 const struct ieee80211_mu_edca_param_set *mu_edca) 1963 { 1964 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1966 size_t left; 1967 int count, mu_edca_count, ac; 1968 const u8 *pos; 1969 u8 uapsd_queues = 0; 1970 1971 if (!local->ops->conf_tx) 1972 return false; 1973 1974 if (local->hw.queues < IEEE80211_NUM_ACS) 1975 return false; 1976 1977 if (!wmm_param) 1978 return false; 1979 1980 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1981 return false; 1982 1983 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1984 uapsd_queues = ifmgd->uapsd_queues; 1985 1986 count = wmm_param[6] & 0x0f; 1987 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1988 * if mu_edca was preset before and now it disappeared tell 1989 * the driver about it. 1990 */ 1991 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1992 if (count == ifmgd->wmm_last_param_set && 1993 mu_edca_count == ifmgd->mu_edca_last_param_set) 1994 return false; 1995 ifmgd->wmm_last_param_set = count; 1996 ifmgd->mu_edca_last_param_set = mu_edca_count; 1997 1998 pos = wmm_param + 8; 1999 left = wmm_param_len - 8; 2000 2001 memset(¶ms, 0, sizeof(params)); 2002 2003 sdata->wmm_acm = 0; 2004 for (; left >= 4; left -= 4, pos += 4) { 2005 int aci = (pos[0] >> 5) & 0x03; 2006 int acm = (pos[0] >> 4) & 0x01; 2007 bool uapsd = false; 2008 2009 switch (aci) { 2010 case 1: /* AC_BK */ 2011 ac = IEEE80211_AC_BK; 2012 if (acm) 2013 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2014 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2015 uapsd = true; 2016 params[ac].mu_edca = !!mu_edca; 2017 if (mu_edca) 2018 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2019 break; 2020 case 2: /* AC_VI */ 2021 ac = IEEE80211_AC_VI; 2022 if (acm) 2023 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2024 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2025 uapsd = true; 2026 params[ac].mu_edca = !!mu_edca; 2027 if (mu_edca) 2028 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2029 break; 2030 case 3: /* AC_VO */ 2031 ac = IEEE80211_AC_VO; 2032 if (acm) 2033 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2034 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2035 uapsd = true; 2036 params[ac].mu_edca = !!mu_edca; 2037 if (mu_edca) 2038 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2039 break; 2040 case 0: /* AC_BE */ 2041 default: 2042 ac = IEEE80211_AC_BE; 2043 if (acm) 2044 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2045 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2046 uapsd = true; 2047 params[ac].mu_edca = !!mu_edca; 2048 if (mu_edca) 2049 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2050 break; 2051 } 2052 2053 params[ac].aifs = pos[0] & 0x0f; 2054 2055 if (params[ac].aifs < 2) { 2056 sdata_info(sdata, 2057 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2058 params[ac].aifs, aci); 2059 params[ac].aifs = 2; 2060 } 2061 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2062 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2063 params[ac].txop = get_unaligned_le16(pos + 2); 2064 params[ac].acm = acm; 2065 params[ac].uapsd = uapsd; 2066 2067 if (params[ac].cw_min == 0 || 2068 params[ac].cw_min > params[ac].cw_max) { 2069 sdata_info(sdata, 2070 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2071 params[ac].cw_min, params[ac].cw_max, aci); 2072 return false; 2073 } 2074 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2075 } 2076 2077 /* WMM specification requires all 4 ACIs. */ 2078 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2079 if (params[ac].cw_min == 0) { 2080 sdata_info(sdata, 2081 "AP has invalid WMM params (missing AC %d), using defaults\n", 2082 ac); 2083 return false; 2084 } 2085 } 2086 2087 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2088 mlme_dbg(sdata, 2089 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2090 ac, params[ac].acm, 2091 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2092 params[ac].txop, params[ac].uapsd, 2093 ifmgd->tx_tspec[ac].downgraded); 2094 sdata->tx_conf[ac] = params[ac]; 2095 if (!ifmgd->tx_tspec[ac].downgraded && 2096 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2097 sdata_err(sdata, 2098 "failed to set TX queue parameters for AC %d\n", 2099 ac); 2100 } 2101 2102 /* enable WMM or activate new settings */ 2103 sdata->vif.bss_conf.qos = true; 2104 return true; 2105 } 2106 2107 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2108 { 2109 lockdep_assert_held(&sdata->local->mtx); 2110 2111 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2112 ieee80211_run_deferred_scan(sdata->local); 2113 } 2114 2115 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2116 { 2117 mutex_lock(&sdata->local->mtx); 2118 __ieee80211_stop_poll(sdata); 2119 mutex_unlock(&sdata->local->mtx); 2120 } 2121 2122 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2123 u16 capab, bool erp_valid, u8 erp) 2124 { 2125 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2126 struct ieee80211_supported_band *sband; 2127 u32 changed = 0; 2128 bool use_protection; 2129 bool use_short_preamble; 2130 bool use_short_slot; 2131 2132 sband = ieee80211_get_sband(sdata); 2133 if (!sband) 2134 return changed; 2135 2136 if (erp_valid) { 2137 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2138 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2139 } else { 2140 use_protection = false; 2141 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2142 } 2143 2144 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2145 if (sband->band == NL80211_BAND_5GHZ || 2146 sband->band == NL80211_BAND_6GHZ) 2147 use_short_slot = true; 2148 2149 if (use_protection != bss_conf->use_cts_prot) { 2150 bss_conf->use_cts_prot = use_protection; 2151 changed |= BSS_CHANGED_ERP_CTS_PROT; 2152 } 2153 2154 if (use_short_preamble != bss_conf->use_short_preamble) { 2155 bss_conf->use_short_preamble = use_short_preamble; 2156 changed |= BSS_CHANGED_ERP_PREAMBLE; 2157 } 2158 2159 if (use_short_slot != bss_conf->use_short_slot) { 2160 bss_conf->use_short_slot = use_short_slot; 2161 changed |= BSS_CHANGED_ERP_SLOT; 2162 } 2163 2164 return changed; 2165 } 2166 2167 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2168 struct cfg80211_bss *cbss, 2169 u32 bss_info_changed) 2170 { 2171 struct ieee80211_bss *bss = (void *)cbss->priv; 2172 struct ieee80211_local *local = sdata->local; 2173 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2174 2175 bss_info_changed |= BSS_CHANGED_ASSOC; 2176 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2177 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2178 2179 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2180 beacon_loss_count * bss_conf->beacon_int)); 2181 2182 sdata->u.mgd.associated = cbss; 2183 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2184 2185 ieee80211_check_rate_mask(sdata); 2186 2187 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2188 2189 if (sdata->vif.p2p || 2190 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2191 const struct cfg80211_bss_ies *ies; 2192 2193 rcu_read_lock(); 2194 ies = rcu_dereference(cbss->ies); 2195 if (ies) { 2196 int ret; 2197 2198 ret = cfg80211_get_p2p_attr( 2199 ies->data, ies->len, 2200 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2201 (u8 *) &bss_conf->p2p_noa_attr, 2202 sizeof(bss_conf->p2p_noa_attr)); 2203 if (ret >= 2) { 2204 sdata->u.mgd.p2p_noa_index = 2205 bss_conf->p2p_noa_attr.index; 2206 bss_info_changed |= BSS_CHANGED_P2P_PS; 2207 } 2208 } 2209 rcu_read_unlock(); 2210 } 2211 2212 /* just to be sure */ 2213 ieee80211_stop_poll(sdata); 2214 2215 ieee80211_led_assoc(local, 1); 2216 2217 if (sdata->u.mgd.have_beacon) { 2218 /* 2219 * If the AP is buggy we may get here with no DTIM period 2220 * known, so assume it's 1 which is the only safe assumption 2221 * in that case, although if the TIM IE is broken powersave 2222 * probably just won't work at all. 2223 */ 2224 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2225 bss_conf->beacon_rate = bss->beacon_rate; 2226 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2227 } else { 2228 bss_conf->beacon_rate = NULL; 2229 bss_conf->dtim_period = 0; 2230 } 2231 2232 bss_conf->assoc = 1; 2233 2234 /* Tell the driver to monitor connection quality (if supported) */ 2235 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2236 bss_conf->cqm_rssi_thold) 2237 bss_info_changed |= BSS_CHANGED_CQM; 2238 2239 /* Enable ARP filtering */ 2240 if (bss_conf->arp_addr_cnt) 2241 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2242 2243 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2244 2245 mutex_lock(&local->iflist_mtx); 2246 ieee80211_recalc_ps(local); 2247 mutex_unlock(&local->iflist_mtx); 2248 2249 ieee80211_recalc_smps(sdata); 2250 ieee80211_recalc_ps_vif(sdata); 2251 2252 netif_carrier_on(sdata->dev); 2253 } 2254 2255 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2256 u16 stype, u16 reason, bool tx, 2257 u8 *frame_buf) 2258 { 2259 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2260 struct ieee80211_local *local = sdata->local; 2261 u32 changed = 0; 2262 struct ieee80211_prep_tx_info info = { 2263 .subtype = stype, 2264 }; 2265 2266 sdata_assert_lock(sdata); 2267 2268 if (WARN_ON_ONCE(tx && !frame_buf)) 2269 return; 2270 2271 if (WARN_ON(!ifmgd->associated)) 2272 return; 2273 2274 ieee80211_stop_poll(sdata); 2275 2276 ifmgd->associated = NULL; 2277 netif_carrier_off(sdata->dev); 2278 2279 /* 2280 * if we want to get out of ps before disassoc (why?) we have 2281 * to do it before sending disassoc, as otherwise the null-packet 2282 * won't be valid. 2283 */ 2284 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2285 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2286 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2287 } 2288 local->ps_sdata = NULL; 2289 2290 /* disable per-vif ps */ 2291 ieee80211_recalc_ps_vif(sdata); 2292 2293 /* make sure ongoing transmission finishes */ 2294 synchronize_net(); 2295 2296 /* 2297 * drop any frame before deauth/disassoc, this can be data or 2298 * management frame. Since we are disconnecting, we should not 2299 * insist sending these frames which can take time and delay 2300 * the disconnection and possible the roaming. 2301 */ 2302 if (tx) 2303 ieee80211_flush_queues(local, sdata, true); 2304 2305 /* deauthenticate/disassociate now */ 2306 if (tx || frame_buf) { 2307 /* 2308 * In multi channel scenarios guarantee that the virtual 2309 * interface is granted immediate airtime to transmit the 2310 * deauthentication frame by calling mgd_prepare_tx, if the 2311 * driver requested so. 2312 */ 2313 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2314 !ifmgd->have_beacon) { 2315 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2316 } 2317 2318 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2319 ifmgd->bssid, stype, reason, 2320 tx, frame_buf); 2321 } 2322 2323 /* flush out frame - make sure the deauth was actually sent */ 2324 if (tx) 2325 ieee80211_flush_queues(local, sdata, false); 2326 2327 drv_mgd_complete_tx(sdata->local, sdata, &info); 2328 2329 /* clear bssid only after building the needed mgmt frames */ 2330 eth_zero_addr(ifmgd->bssid); 2331 2332 sdata->vif.bss_conf.ssid_len = 0; 2333 2334 /* remove AP and TDLS peers */ 2335 sta_info_flush(sdata); 2336 2337 /* finally reset all BSS / config parameters */ 2338 changed |= ieee80211_reset_erp_info(sdata); 2339 2340 ieee80211_led_assoc(local, 0); 2341 changed |= BSS_CHANGED_ASSOC; 2342 sdata->vif.bss_conf.assoc = false; 2343 2344 ifmgd->p2p_noa_index = -1; 2345 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2346 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2347 2348 /* on the next assoc, re-program HT/VHT parameters */ 2349 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2350 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2351 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2352 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2353 2354 /* reset MU-MIMO ownership and group data */ 2355 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2356 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2357 memset(sdata->vif.bss_conf.mu_group.position, 0, 2358 sizeof(sdata->vif.bss_conf.mu_group.position)); 2359 changed |= BSS_CHANGED_MU_GROUPS; 2360 sdata->vif.mu_mimo_owner = false; 2361 2362 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2363 2364 del_timer_sync(&local->dynamic_ps_timer); 2365 cancel_work_sync(&local->dynamic_ps_enable_work); 2366 2367 /* Disable ARP filtering */ 2368 if (sdata->vif.bss_conf.arp_addr_cnt) 2369 changed |= BSS_CHANGED_ARP_FILTER; 2370 2371 sdata->vif.bss_conf.qos = false; 2372 changed |= BSS_CHANGED_QOS; 2373 2374 /* The BSSID (not really interesting) and HT changed */ 2375 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2376 ieee80211_bss_info_change_notify(sdata, changed); 2377 2378 /* disassociated - set to defaults now */ 2379 ieee80211_set_wmm_default(sdata, false, false); 2380 2381 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2382 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2383 del_timer_sync(&sdata->u.mgd.timer); 2384 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2385 2386 sdata->vif.bss_conf.dtim_period = 0; 2387 sdata->vif.bss_conf.beacon_rate = NULL; 2388 2389 ifmgd->have_beacon = false; 2390 2391 ifmgd->flags = 0; 2392 mutex_lock(&local->mtx); 2393 ieee80211_vif_release_channel(sdata); 2394 2395 sdata->vif.csa_active = false; 2396 ifmgd->csa_waiting_bcn = false; 2397 ifmgd->csa_ignored_same_chan = false; 2398 if (sdata->csa_block_tx) { 2399 ieee80211_wake_vif_queues(local, sdata, 2400 IEEE80211_QUEUE_STOP_REASON_CSA); 2401 sdata->csa_block_tx = false; 2402 } 2403 mutex_unlock(&local->mtx); 2404 2405 /* existing TX TSPEC sessions no longer exist */ 2406 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2407 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2408 2409 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2410 } 2411 2412 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2413 { 2414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2415 struct ieee80211_local *local = sdata->local; 2416 2417 mutex_lock(&local->mtx); 2418 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2419 goto out; 2420 2421 __ieee80211_stop_poll(sdata); 2422 2423 mutex_lock(&local->iflist_mtx); 2424 ieee80211_recalc_ps(local); 2425 mutex_unlock(&local->iflist_mtx); 2426 2427 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2428 goto out; 2429 2430 /* 2431 * We've received a probe response, but are not sure whether 2432 * we have or will be receiving any beacons or data, so let's 2433 * schedule the timers again, just in case. 2434 */ 2435 ieee80211_sta_reset_beacon_monitor(sdata); 2436 2437 mod_timer(&ifmgd->conn_mon_timer, 2438 round_jiffies_up(jiffies + 2439 IEEE80211_CONNECTION_IDLE_TIME)); 2440 out: 2441 mutex_unlock(&local->mtx); 2442 } 2443 2444 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2445 struct ieee80211_hdr *hdr, 2446 u16 tx_time) 2447 { 2448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2449 u16 tid = ieee80211_get_tid(hdr); 2450 int ac = ieee80211_ac_from_tid(tid); 2451 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2452 unsigned long now = jiffies; 2453 2454 if (likely(!tx_tspec->admitted_time)) 2455 return; 2456 2457 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2458 tx_tspec->consumed_tx_time = 0; 2459 tx_tspec->time_slice_start = now; 2460 2461 if (tx_tspec->downgraded) { 2462 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2463 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2464 } 2465 } 2466 2467 if (tx_tspec->downgraded) 2468 return; 2469 2470 tx_tspec->consumed_tx_time += tx_time; 2471 2472 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2473 tx_tspec->downgraded = true; 2474 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2475 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2476 } 2477 } 2478 2479 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2480 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2481 { 2482 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2483 2484 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2485 !sdata->u.mgd.probe_send_count) 2486 return; 2487 2488 if (ack) 2489 sdata->u.mgd.probe_send_count = 0; 2490 else 2491 sdata->u.mgd.nullfunc_failed = true; 2492 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2493 } 2494 2495 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2496 const u8 *src, const u8 *dst, 2497 const u8 *ssid, size_t ssid_len, 2498 struct ieee80211_channel *channel) 2499 { 2500 struct sk_buff *skb; 2501 2502 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2503 ssid, ssid_len, NULL, 0, 2504 IEEE80211_PROBE_FLAG_DIRECTED); 2505 if (skb) 2506 ieee80211_tx_skb(sdata, skb); 2507 } 2508 2509 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2510 { 2511 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2512 const u8 *ssid; 2513 u8 *dst = ifmgd->associated->bssid; 2514 u8 unicast_limit = max(1, max_probe_tries - 3); 2515 struct sta_info *sta; 2516 2517 /* 2518 * Try sending broadcast probe requests for the last three 2519 * probe requests after the first ones failed since some 2520 * buggy APs only support broadcast probe requests. 2521 */ 2522 if (ifmgd->probe_send_count >= unicast_limit) 2523 dst = NULL; 2524 2525 /* 2526 * When the hardware reports an accurate Tx ACK status, it's 2527 * better to send a nullfunc frame instead of a probe request, 2528 * as it will kick us off the AP quickly if we aren't associated 2529 * anymore. The timeout will be reset if the frame is ACKed by 2530 * the AP. 2531 */ 2532 ifmgd->probe_send_count++; 2533 2534 if (dst) { 2535 mutex_lock(&sdata->local->sta_mtx); 2536 sta = sta_info_get(sdata, dst); 2537 if (!WARN_ON(!sta)) 2538 ieee80211_check_fast_rx(sta); 2539 mutex_unlock(&sdata->local->sta_mtx); 2540 } 2541 2542 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2543 ifmgd->nullfunc_failed = false; 2544 ieee80211_send_nullfunc(sdata->local, sdata, false); 2545 } else { 2546 int ssid_len; 2547 2548 rcu_read_lock(); 2549 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2550 if (WARN_ON_ONCE(ssid == NULL)) 2551 ssid_len = 0; 2552 else 2553 ssid_len = ssid[1]; 2554 2555 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2556 ssid + 2, ssid_len, 2557 ifmgd->associated->channel); 2558 rcu_read_unlock(); 2559 } 2560 2561 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2562 run_again(sdata, ifmgd->probe_timeout); 2563 } 2564 2565 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2566 bool beacon) 2567 { 2568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2569 bool already = false; 2570 2571 if (!ieee80211_sdata_running(sdata)) 2572 return; 2573 2574 sdata_lock(sdata); 2575 2576 if (!ifmgd->associated) 2577 goto out; 2578 2579 mutex_lock(&sdata->local->mtx); 2580 2581 if (sdata->local->tmp_channel || sdata->local->scanning) { 2582 mutex_unlock(&sdata->local->mtx); 2583 goto out; 2584 } 2585 2586 if (beacon) { 2587 mlme_dbg_ratelimited(sdata, 2588 "detected beacon loss from AP (missed %d beacons) - probing\n", 2589 beacon_loss_count); 2590 2591 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2592 } 2593 2594 /* 2595 * The driver/our work has already reported this event or the 2596 * connection monitoring has kicked in and we have already sent 2597 * a probe request. Or maybe the AP died and the driver keeps 2598 * reporting until we disassociate... 2599 * 2600 * In either case we have to ignore the current call to this 2601 * function (except for setting the correct probe reason bit) 2602 * because otherwise we would reset the timer every time and 2603 * never check whether we received a probe response! 2604 */ 2605 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2606 already = true; 2607 2608 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2609 2610 mutex_unlock(&sdata->local->mtx); 2611 2612 if (already) 2613 goto out; 2614 2615 mutex_lock(&sdata->local->iflist_mtx); 2616 ieee80211_recalc_ps(sdata->local); 2617 mutex_unlock(&sdata->local->iflist_mtx); 2618 2619 ifmgd->probe_send_count = 0; 2620 ieee80211_mgd_probe_ap_send(sdata); 2621 out: 2622 sdata_unlock(sdata); 2623 } 2624 2625 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2626 struct ieee80211_vif *vif) 2627 { 2628 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2630 struct cfg80211_bss *cbss; 2631 struct sk_buff *skb; 2632 const u8 *ssid; 2633 int ssid_len; 2634 2635 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2636 return NULL; 2637 2638 sdata_assert_lock(sdata); 2639 2640 if (ifmgd->associated) 2641 cbss = ifmgd->associated; 2642 else if (ifmgd->auth_data) 2643 cbss = ifmgd->auth_data->bss; 2644 else if (ifmgd->assoc_data) 2645 cbss = ifmgd->assoc_data->bss; 2646 else 2647 return NULL; 2648 2649 rcu_read_lock(); 2650 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2651 if (WARN_ONCE(!ssid || ssid[1] > IEEE80211_MAX_SSID_LEN, 2652 "invalid SSID element (len=%d)", ssid ? ssid[1] : -1)) 2653 ssid_len = 0; 2654 else 2655 ssid_len = ssid[1]; 2656 2657 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2658 (u32) -1, cbss->channel, 2659 ssid + 2, ssid_len, 2660 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2661 rcu_read_unlock(); 2662 2663 return skb; 2664 } 2665 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2666 2667 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2668 const u8 *buf, size_t len, bool tx, 2669 u16 reason, bool reconnect) 2670 { 2671 struct ieee80211_event event = { 2672 .type = MLME_EVENT, 2673 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2674 .u.mlme.reason = reason, 2675 }; 2676 2677 if (tx) 2678 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2679 else 2680 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2681 2682 drv_event_callback(sdata->local, sdata, &event); 2683 } 2684 2685 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2686 { 2687 struct ieee80211_local *local = sdata->local; 2688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2689 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2690 bool tx; 2691 2692 sdata_lock(sdata); 2693 if (!ifmgd->associated) { 2694 sdata_unlock(sdata); 2695 return; 2696 } 2697 2698 tx = !sdata->csa_block_tx; 2699 2700 if (!ifmgd->driver_disconnect) { 2701 /* 2702 * AP is probably out of range (or not reachable for another 2703 * reason) so remove the bss struct for that AP. 2704 */ 2705 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2706 } 2707 2708 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2709 ifmgd->driver_disconnect ? 2710 WLAN_REASON_DEAUTH_LEAVING : 2711 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2712 tx, frame_buf); 2713 mutex_lock(&local->mtx); 2714 sdata->vif.csa_active = false; 2715 ifmgd->csa_waiting_bcn = false; 2716 if (sdata->csa_block_tx) { 2717 ieee80211_wake_vif_queues(local, sdata, 2718 IEEE80211_QUEUE_STOP_REASON_CSA); 2719 sdata->csa_block_tx = false; 2720 } 2721 mutex_unlock(&local->mtx); 2722 2723 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2724 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2725 ifmgd->reconnect); 2726 ifmgd->reconnect = false; 2727 2728 sdata_unlock(sdata); 2729 } 2730 2731 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2732 { 2733 struct ieee80211_sub_if_data *sdata = 2734 container_of(work, struct ieee80211_sub_if_data, 2735 u.mgd.beacon_connection_loss_work); 2736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2737 2738 if (ifmgd->associated) 2739 ifmgd->beacon_loss_count++; 2740 2741 if (ifmgd->connection_loss) { 2742 sdata_info(sdata, "Connection to AP %pM lost\n", 2743 ifmgd->bssid); 2744 __ieee80211_disconnect(sdata); 2745 ifmgd->connection_loss = false; 2746 } else if (ifmgd->driver_disconnect) { 2747 sdata_info(sdata, 2748 "Driver requested disconnection from AP %pM\n", 2749 ifmgd->bssid); 2750 __ieee80211_disconnect(sdata); 2751 ifmgd->driver_disconnect = false; 2752 } else { 2753 ieee80211_mgd_probe_ap(sdata, true); 2754 } 2755 } 2756 2757 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2758 { 2759 struct ieee80211_sub_if_data *sdata = 2760 container_of(work, struct ieee80211_sub_if_data, 2761 u.mgd.csa_connection_drop_work); 2762 2763 __ieee80211_disconnect(sdata); 2764 } 2765 2766 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2767 { 2768 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2769 struct ieee80211_hw *hw = &sdata->local->hw; 2770 2771 trace_api_beacon_loss(sdata); 2772 2773 sdata->u.mgd.connection_loss = false; 2774 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2775 } 2776 EXPORT_SYMBOL(ieee80211_beacon_loss); 2777 2778 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2779 { 2780 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2781 struct ieee80211_hw *hw = &sdata->local->hw; 2782 2783 trace_api_connection_loss(sdata); 2784 2785 sdata->u.mgd.connection_loss = true; 2786 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2787 } 2788 EXPORT_SYMBOL(ieee80211_connection_loss); 2789 2790 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2791 { 2792 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2793 struct ieee80211_hw *hw = &sdata->local->hw; 2794 2795 trace_api_disconnect(sdata, reconnect); 2796 2797 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2798 return; 2799 2800 sdata->u.mgd.driver_disconnect = true; 2801 sdata->u.mgd.reconnect = reconnect; 2802 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2803 } 2804 EXPORT_SYMBOL(ieee80211_disconnect); 2805 2806 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2807 bool assoc) 2808 { 2809 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2810 2811 sdata_assert_lock(sdata); 2812 2813 if (!assoc) { 2814 /* 2815 * we are not authenticated yet, the only timer that could be 2816 * running is the timeout for the authentication response which 2817 * which is not relevant anymore. 2818 */ 2819 del_timer_sync(&sdata->u.mgd.timer); 2820 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2821 2822 eth_zero_addr(sdata->u.mgd.bssid); 2823 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2824 sdata->u.mgd.flags = 0; 2825 mutex_lock(&sdata->local->mtx); 2826 ieee80211_vif_release_channel(sdata); 2827 mutex_unlock(&sdata->local->mtx); 2828 } 2829 2830 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2831 kfree(auth_data); 2832 sdata->u.mgd.auth_data = NULL; 2833 } 2834 2835 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2836 bool assoc, bool abandon) 2837 { 2838 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2839 2840 sdata_assert_lock(sdata); 2841 2842 if (!assoc) { 2843 /* 2844 * we are not associated yet, the only timer that could be 2845 * running is the timeout for the association response which 2846 * which is not relevant anymore. 2847 */ 2848 del_timer_sync(&sdata->u.mgd.timer); 2849 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2850 2851 eth_zero_addr(sdata->u.mgd.bssid); 2852 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2853 sdata->u.mgd.flags = 0; 2854 sdata->vif.mu_mimo_owner = false; 2855 2856 mutex_lock(&sdata->local->mtx); 2857 ieee80211_vif_release_channel(sdata); 2858 mutex_unlock(&sdata->local->mtx); 2859 2860 if (abandon) 2861 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2862 } 2863 2864 kfree(assoc_data); 2865 sdata->u.mgd.assoc_data = NULL; 2866 } 2867 2868 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2869 struct ieee80211_mgmt *mgmt, size_t len) 2870 { 2871 struct ieee80211_local *local = sdata->local; 2872 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2873 u8 *pos; 2874 struct ieee802_11_elems elems; 2875 u32 tx_flags = 0; 2876 struct ieee80211_prep_tx_info info = { 2877 .subtype = IEEE80211_STYPE_AUTH, 2878 }; 2879 2880 pos = mgmt->u.auth.variable; 2881 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 2882 mgmt->bssid, auth_data->bss->bssid); 2883 if (!elems.challenge) 2884 return; 2885 auth_data->expected_transaction = 4; 2886 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2887 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2888 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2889 IEEE80211_TX_INTFL_MLME_CONN_TX; 2890 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2891 elems.challenge - 2, elems.challenge_len + 2, 2892 auth_data->bss->bssid, auth_data->bss->bssid, 2893 auth_data->key, auth_data->key_len, 2894 auth_data->key_idx, tx_flags); 2895 } 2896 2897 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2898 const u8 *bssid) 2899 { 2900 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2901 struct sta_info *sta; 2902 bool result = true; 2903 2904 sdata_info(sdata, "authenticated\n"); 2905 ifmgd->auth_data->done = true; 2906 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2907 ifmgd->auth_data->timeout_started = true; 2908 run_again(sdata, ifmgd->auth_data->timeout); 2909 2910 /* move station state to auth */ 2911 mutex_lock(&sdata->local->sta_mtx); 2912 sta = sta_info_get(sdata, bssid); 2913 if (!sta) { 2914 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2915 result = false; 2916 goto out; 2917 } 2918 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2919 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2920 result = false; 2921 goto out; 2922 } 2923 2924 out: 2925 mutex_unlock(&sdata->local->sta_mtx); 2926 return result; 2927 } 2928 2929 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2930 struct ieee80211_mgmt *mgmt, size_t len) 2931 { 2932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2933 u8 bssid[ETH_ALEN]; 2934 u16 auth_alg, auth_transaction, status_code; 2935 struct ieee80211_event event = { 2936 .type = MLME_EVENT, 2937 .u.mlme.data = AUTH_EVENT, 2938 }; 2939 struct ieee80211_prep_tx_info info = { 2940 .subtype = IEEE80211_STYPE_AUTH, 2941 }; 2942 2943 sdata_assert_lock(sdata); 2944 2945 if (len < 24 + 6) 2946 return; 2947 2948 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2949 return; 2950 2951 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2952 2953 if (!ether_addr_equal(bssid, mgmt->bssid)) 2954 return; 2955 2956 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2957 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2958 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2959 2960 if (auth_alg != ifmgd->auth_data->algorithm || 2961 (auth_alg != WLAN_AUTH_SAE && 2962 auth_transaction != ifmgd->auth_data->expected_transaction) || 2963 (auth_alg == WLAN_AUTH_SAE && 2964 (auth_transaction < ifmgd->auth_data->expected_transaction || 2965 auth_transaction > 2))) { 2966 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2967 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2968 auth_transaction, 2969 ifmgd->auth_data->expected_transaction); 2970 goto notify_driver; 2971 } 2972 2973 if (status_code != WLAN_STATUS_SUCCESS) { 2974 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2975 2976 if (auth_alg == WLAN_AUTH_SAE && 2977 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 2978 (auth_transaction == 1 && 2979 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 2980 status_code == WLAN_STATUS_SAE_PK)))) 2981 goto notify_driver; 2982 2983 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2984 mgmt->sa, status_code); 2985 ieee80211_destroy_auth_data(sdata, false); 2986 event.u.mlme.status = MLME_DENIED; 2987 event.u.mlme.reason = status_code; 2988 drv_event_callback(sdata->local, sdata, &event); 2989 goto notify_driver; 2990 } 2991 2992 switch (ifmgd->auth_data->algorithm) { 2993 case WLAN_AUTH_OPEN: 2994 case WLAN_AUTH_LEAP: 2995 case WLAN_AUTH_FT: 2996 case WLAN_AUTH_SAE: 2997 case WLAN_AUTH_FILS_SK: 2998 case WLAN_AUTH_FILS_SK_PFS: 2999 case WLAN_AUTH_FILS_PK: 3000 break; 3001 case WLAN_AUTH_SHARED_KEY: 3002 if (ifmgd->auth_data->expected_transaction != 4) { 3003 ieee80211_auth_challenge(sdata, mgmt, len); 3004 /* need another frame */ 3005 return; 3006 } 3007 break; 3008 default: 3009 WARN_ONCE(1, "invalid auth alg %d", 3010 ifmgd->auth_data->algorithm); 3011 goto notify_driver; 3012 } 3013 3014 event.u.mlme.status = MLME_SUCCESS; 3015 info.success = 1; 3016 drv_event_callback(sdata->local, sdata, &event); 3017 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3018 (auth_transaction == 2 && 3019 ifmgd->auth_data->expected_transaction == 2)) { 3020 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3021 return; /* ignore frame -- wait for timeout */ 3022 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3023 auth_transaction == 2) { 3024 sdata_info(sdata, "SAE peer confirmed\n"); 3025 ifmgd->auth_data->peer_confirmed = true; 3026 } 3027 3028 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3029 notify_driver: 3030 drv_mgd_complete_tx(sdata->local, sdata, &info); 3031 } 3032 3033 #define case_WLAN(type) \ 3034 case WLAN_REASON_##type: return #type 3035 3036 const char *ieee80211_get_reason_code_string(u16 reason_code) 3037 { 3038 switch (reason_code) { 3039 case_WLAN(UNSPECIFIED); 3040 case_WLAN(PREV_AUTH_NOT_VALID); 3041 case_WLAN(DEAUTH_LEAVING); 3042 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3043 case_WLAN(DISASSOC_AP_BUSY); 3044 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3045 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3046 case_WLAN(DISASSOC_STA_HAS_LEFT); 3047 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3048 case_WLAN(DISASSOC_BAD_POWER); 3049 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3050 case_WLAN(INVALID_IE); 3051 case_WLAN(MIC_FAILURE); 3052 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3053 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3054 case_WLAN(IE_DIFFERENT); 3055 case_WLAN(INVALID_GROUP_CIPHER); 3056 case_WLAN(INVALID_PAIRWISE_CIPHER); 3057 case_WLAN(INVALID_AKMP); 3058 case_WLAN(UNSUPP_RSN_VERSION); 3059 case_WLAN(INVALID_RSN_IE_CAP); 3060 case_WLAN(IEEE8021X_FAILED); 3061 case_WLAN(CIPHER_SUITE_REJECTED); 3062 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3063 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3064 case_WLAN(DISASSOC_LOW_ACK); 3065 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3066 case_WLAN(QSTA_LEAVE_QBSS); 3067 case_WLAN(QSTA_NOT_USE); 3068 case_WLAN(QSTA_REQUIRE_SETUP); 3069 case_WLAN(QSTA_TIMEOUT); 3070 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3071 case_WLAN(MESH_PEER_CANCELED); 3072 case_WLAN(MESH_MAX_PEERS); 3073 case_WLAN(MESH_CONFIG); 3074 case_WLAN(MESH_CLOSE); 3075 case_WLAN(MESH_MAX_RETRIES); 3076 case_WLAN(MESH_CONFIRM_TIMEOUT); 3077 case_WLAN(MESH_INVALID_GTK); 3078 case_WLAN(MESH_INCONSISTENT_PARAM); 3079 case_WLAN(MESH_INVALID_SECURITY); 3080 case_WLAN(MESH_PATH_ERROR); 3081 case_WLAN(MESH_PATH_NOFORWARD); 3082 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3083 case_WLAN(MAC_EXISTS_IN_MBSS); 3084 case_WLAN(MESH_CHAN_REGULATORY); 3085 case_WLAN(MESH_CHAN); 3086 default: return "<unknown>"; 3087 } 3088 } 3089 3090 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3091 struct ieee80211_mgmt *mgmt, size_t len) 3092 { 3093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3094 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3095 3096 sdata_assert_lock(sdata); 3097 3098 if (len < 24 + 2) 3099 return; 3100 3101 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3102 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3103 return; 3104 } 3105 3106 if (ifmgd->associated && 3107 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3108 const u8 *bssid = ifmgd->associated->bssid; 3109 3110 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3111 bssid, reason_code, 3112 ieee80211_get_reason_code_string(reason_code)); 3113 3114 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3115 3116 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3117 reason_code, false); 3118 return; 3119 } 3120 3121 if (ifmgd->assoc_data && 3122 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3123 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3124 3125 sdata_info(sdata, 3126 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3127 bssid, reason_code, 3128 ieee80211_get_reason_code_string(reason_code)); 3129 3130 ieee80211_destroy_assoc_data(sdata, false, true); 3131 3132 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3133 return; 3134 } 3135 } 3136 3137 3138 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3139 struct ieee80211_mgmt *mgmt, size_t len) 3140 { 3141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3142 u16 reason_code; 3143 3144 sdata_assert_lock(sdata); 3145 3146 if (len < 24 + 2) 3147 return; 3148 3149 if (!ifmgd->associated || 3150 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3151 return; 3152 3153 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3154 3155 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3156 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3157 return; 3158 } 3159 3160 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3161 mgmt->sa, reason_code, 3162 ieee80211_get_reason_code_string(reason_code)); 3163 3164 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3165 3166 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3167 false); 3168 } 3169 3170 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3171 u8 *supp_rates, unsigned int supp_rates_len, 3172 u32 *rates, u32 *basic_rates, 3173 bool *have_higher_than_11mbit, 3174 int *min_rate, int *min_rate_index, 3175 int shift) 3176 { 3177 int i, j; 3178 3179 for (i = 0; i < supp_rates_len; i++) { 3180 int rate = supp_rates[i] & 0x7f; 3181 bool is_basic = !!(supp_rates[i] & 0x80); 3182 3183 if ((rate * 5 * (1 << shift)) > 110) 3184 *have_higher_than_11mbit = true; 3185 3186 /* 3187 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3188 * since they're not rates. 3189 * 3190 * Note: Even though the membership selector and the basic 3191 * rate flag share the same bit, they are not exactly 3192 * the same. 3193 */ 3194 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3195 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3196 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3197 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3198 continue; 3199 3200 for (j = 0; j < sband->n_bitrates; j++) { 3201 struct ieee80211_rate *br; 3202 int brate; 3203 3204 br = &sband->bitrates[j]; 3205 3206 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3207 if (brate == rate) { 3208 *rates |= BIT(j); 3209 if (is_basic) 3210 *basic_rates |= BIT(j); 3211 if ((rate * 5) < *min_rate) { 3212 *min_rate = rate * 5; 3213 *min_rate_index = j; 3214 } 3215 break; 3216 } 3217 } 3218 } 3219 } 3220 3221 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3222 const struct ieee802_11_elems *elems) 3223 { 3224 if (elems->ext_capab_len < 10) 3225 return false; 3226 3227 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3228 return false; 3229 3230 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3231 IEEE80211_HE_MAC_CAP0_TWT_RES; 3232 } 3233 3234 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3235 struct sta_info *sta, 3236 struct ieee802_11_elems *elems) 3237 { 3238 bool twt = ieee80211_twt_req_supported(sta, elems); 3239 3240 if (sdata->vif.bss_conf.twt_requester != twt) { 3241 sdata->vif.bss_conf.twt_requester = twt; 3242 return BSS_CHANGED_TWT; 3243 } 3244 return 0; 3245 } 3246 3247 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3248 struct ieee80211_bss_conf *bss_conf, 3249 struct ieee80211_supported_band *sband, 3250 struct sta_info *sta) 3251 { 3252 const struct ieee80211_sta_he_cap *own_he_cap = 3253 ieee80211_get_he_iftype_cap(sband, 3254 ieee80211_vif_type_p2p(&sdata->vif)); 3255 3256 return bss_conf->he_support && 3257 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3258 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3259 own_he_cap && 3260 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3261 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3262 } 3263 3264 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3265 struct cfg80211_bss *cbss, 3266 struct ieee80211_mgmt *mgmt, size_t len, 3267 struct ieee802_11_elems *elems) 3268 { 3269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3270 struct ieee80211_local *local = sdata->local; 3271 struct ieee80211_supported_band *sband; 3272 struct sta_info *sta; 3273 u16 capab_info, aid; 3274 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3275 const struct cfg80211_bss_ies *bss_ies = NULL; 3276 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3277 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3278 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3279 u32 changed = 0; 3280 u8 *pos; 3281 int err; 3282 bool ret; 3283 3284 /* AssocResp and ReassocResp have identical structure */ 3285 3286 pos = mgmt->u.assoc_resp.variable; 3287 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3288 if (is_s1g) { 3289 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3290 aid = 0; /* TODO */ 3291 } 3292 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3293 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems, 3294 mgmt->bssid, assoc_data->bss->bssid); 3295 3296 if (elems->aid_resp) 3297 aid = le16_to_cpu(elems->aid_resp->aid); 3298 3299 /* 3300 * The 5 MSB of the AID field are reserved 3301 * (802.11-2016 9.4.1.8 AID field) 3302 */ 3303 aid &= 0x7ff; 3304 3305 ifmgd->broken_ap = false; 3306 3307 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3308 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3309 aid); 3310 aid = 0; 3311 ifmgd->broken_ap = true; 3312 } 3313 3314 if (!is_s1g && !elems->supp_rates) { 3315 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3316 return false; 3317 } 3318 3319 sdata->vif.bss_conf.aid = aid; 3320 ifmgd->tdls_chan_switch_prohibited = 3321 elems->ext_capab && elems->ext_capab_len >= 5 && 3322 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3323 3324 /* 3325 * Some APs are erroneously not including some information in their 3326 * (re)association response frames. Try to recover by using the data 3327 * from the beacon or probe response. This seems to afflict mobile 3328 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3329 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3330 */ 3331 if (!is_6ghz && 3332 ((assoc_data->wmm && !elems->wmm_param) || 3333 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3334 (!elems->ht_cap_elem || !elems->ht_operation)) || 3335 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3336 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3337 const struct cfg80211_bss_ies *ies; 3338 struct ieee802_11_elems bss_elems; 3339 3340 rcu_read_lock(); 3341 ies = rcu_dereference(cbss->ies); 3342 if (ies) 3343 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3344 GFP_ATOMIC); 3345 rcu_read_unlock(); 3346 if (!bss_ies) 3347 return false; 3348 3349 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3350 false, &bss_elems, 3351 mgmt->bssid, 3352 assoc_data->bss->bssid); 3353 if (assoc_data->wmm && 3354 !elems->wmm_param && bss_elems.wmm_param) { 3355 elems->wmm_param = bss_elems.wmm_param; 3356 sdata_info(sdata, 3357 "AP bug: WMM param missing from AssocResp\n"); 3358 } 3359 3360 /* 3361 * Also check if we requested HT/VHT, otherwise the AP doesn't 3362 * have to include the IEs in the (re)association response. 3363 */ 3364 if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && 3365 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3366 elems->ht_cap_elem = bss_elems.ht_cap_elem; 3367 sdata_info(sdata, 3368 "AP bug: HT capability missing from AssocResp\n"); 3369 } 3370 if (!elems->ht_operation && bss_elems.ht_operation && 3371 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3372 elems->ht_operation = bss_elems.ht_operation; 3373 sdata_info(sdata, 3374 "AP bug: HT operation missing from AssocResp\n"); 3375 } 3376 if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && 3377 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3378 elems->vht_cap_elem = bss_elems.vht_cap_elem; 3379 sdata_info(sdata, 3380 "AP bug: VHT capa missing from AssocResp\n"); 3381 } 3382 if (!elems->vht_operation && bss_elems.vht_operation && 3383 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3384 elems->vht_operation = bss_elems.vht_operation; 3385 sdata_info(sdata, 3386 "AP bug: VHT operation missing from AssocResp\n"); 3387 } 3388 } 3389 3390 /* 3391 * We previously checked these in the beacon/probe response, so 3392 * they should be present here. This is just a safety net. 3393 */ 3394 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3395 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3396 sdata_info(sdata, 3397 "HT AP is missing WMM params or HT capability/operation\n"); 3398 ret = false; 3399 goto out; 3400 } 3401 3402 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3403 (!elems->vht_cap_elem || !elems->vht_operation)) { 3404 sdata_info(sdata, 3405 "VHT AP is missing VHT capability/operation\n"); 3406 ret = false; 3407 goto out; 3408 } 3409 3410 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3411 !elems->he_6ghz_capa) { 3412 sdata_info(sdata, 3413 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3414 ret = false; 3415 goto out; 3416 } 3417 3418 mutex_lock(&sdata->local->sta_mtx); 3419 /* 3420 * station info was already allocated and inserted before 3421 * the association and should be available to us 3422 */ 3423 sta = sta_info_get(sdata, cbss->bssid); 3424 if (WARN_ON(!sta)) { 3425 mutex_unlock(&sdata->local->sta_mtx); 3426 ret = false; 3427 goto out; 3428 } 3429 3430 sband = ieee80211_get_sband(sdata); 3431 if (!sband) { 3432 mutex_unlock(&sdata->local->sta_mtx); 3433 ret = false; 3434 goto out; 3435 } 3436 3437 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3438 (!elems->he_cap || !elems->he_operation)) { 3439 mutex_unlock(&sdata->local->sta_mtx); 3440 sdata_info(sdata, 3441 "HE AP is missing HE capability/operation\n"); 3442 ret = false; 3443 goto out; 3444 } 3445 3446 /* Set up internal HT/VHT capabilities */ 3447 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3448 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3449 elems->ht_cap_elem, sta); 3450 3451 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3452 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3453 elems->vht_cap_elem, sta); 3454 3455 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3456 elems->he_cap) { 3457 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3458 elems->he_cap, 3459 elems->he_cap_len, 3460 elems->he_6ghz_capa, 3461 sta); 3462 3463 bss_conf->he_support = sta->sta.he_cap.has_he; 3464 if (elems->rsnx && elems->rsnx_len && 3465 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3466 wiphy_ext_feature_isset(local->hw.wiphy, 3467 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3468 bss_conf->twt_protected = true; 3469 else 3470 bss_conf->twt_protected = false; 3471 3472 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3473 } else { 3474 bss_conf->he_support = false; 3475 bss_conf->twt_requester = false; 3476 bss_conf->twt_protected = false; 3477 } 3478 3479 bss_conf->twt_broadcast = 3480 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3481 3482 if (bss_conf->he_support) { 3483 bss_conf->he_bss_color.color = 3484 le32_get_bits(elems->he_operation->he_oper_params, 3485 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3486 bss_conf->he_bss_color.partial = 3487 le32_get_bits(elems->he_operation->he_oper_params, 3488 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3489 bss_conf->he_bss_color.enabled = 3490 !le32_get_bits(elems->he_operation->he_oper_params, 3491 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3492 3493 if (bss_conf->he_bss_color.enabled) 3494 changed |= BSS_CHANGED_HE_BSS_COLOR; 3495 3496 bss_conf->htc_trig_based_pkt_ext = 3497 le32_get_bits(elems->he_operation->he_oper_params, 3498 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3499 bss_conf->frame_time_rts_th = 3500 le32_get_bits(elems->he_operation->he_oper_params, 3501 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3502 3503 bss_conf->uora_exists = !!elems->uora_element; 3504 if (elems->uora_element) 3505 bss_conf->uora_ocw_range = elems->uora_element[0]; 3506 3507 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3508 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3509 /* TODO: OPEN: what happens if BSS color disable is set? */ 3510 } 3511 3512 if (cbss->transmitted_bss) { 3513 bss_conf->nontransmitted = true; 3514 ether_addr_copy(bss_conf->transmitter_bssid, 3515 cbss->transmitted_bss->bssid); 3516 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3517 bss_conf->bssid_index = cbss->bssid_index; 3518 } 3519 3520 /* 3521 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3522 * in their association response, so ignore that data for our own 3523 * configuration. If it changed since the last beacon, we'll get the 3524 * next beacon and update then. 3525 */ 3526 3527 /* 3528 * If an operating mode notification IE is present, override the 3529 * NSS calculation (that would be done in rate_control_rate_init()) 3530 * and use the # of streams from that element. 3531 */ 3532 if (elems->opmode_notif && 3533 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3534 u8 nss; 3535 3536 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3537 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3538 nss += 1; 3539 sta->sta.rx_nss = nss; 3540 } 3541 3542 rate_control_rate_init(sta); 3543 3544 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3545 set_sta_flag(sta, WLAN_STA_MFP); 3546 sta->sta.mfp = true; 3547 } else { 3548 sta->sta.mfp = false; 3549 } 3550 3551 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3552 local->hw.queues >= IEEE80211_NUM_ACS; 3553 3554 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3555 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3556 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3557 if (err) { 3558 sdata_info(sdata, 3559 "failed to move station %pM to desired state\n", 3560 sta->sta.addr); 3561 WARN_ON(__sta_info_destroy(sta)); 3562 mutex_unlock(&sdata->local->sta_mtx); 3563 ret = false; 3564 goto out; 3565 } 3566 3567 if (sdata->wdev.use_4addr) 3568 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3569 3570 mutex_unlock(&sdata->local->sta_mtx); 3571 3572 /* 3573 * Always handle WMM once after association regardless 3574 * of the first value the AP uses. Setting -1 here has 3575 * that effect because the AP values is an unsigned 3576 * 4-bit value. 3577 */ 3578 ifmgd->wmm_last_param_set = -1; 3579 ifmgd->mu_edca_last_param_set = -1; 3580 3581 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3582 ieee80211_set_wmm_default(sdata, false, false); 3583 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3584 elems->wmm_param_len, 3585 elems->mu_edca_param_set)) { 3586 /* still enable QoS since we might have HT/VHT */ 3587 ieee80211_set_wmm_default(sdata, false, true); 3588 /* set the disable-WMM flag in this case to disable 3589 * tracking WMM parameter changes in the beacon if 3590 * the parameters weren't actually valid. Doing so 3591 * avoids changing parameters very strangely when 3592 * the AP is going back and forth between valid and 3593 * invalid parameters. 3594 */ 3595 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3596 } 3597 changed |= BSS_CHANGED_QOS; 3598 3599 if (elems->max_idle_period_ie) { 3600 bss_conf->max_idle_period = 3601 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3602 bss_conf->protected_keep_alive = 3603 !!(elems->max_idle_period_ie->idle_options & 3604 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3605 changed |= BSS_CHANGED_KEEP_ALIVE; 3606 } else { 3607 bss_conf->max_idle_period = 0; 3608 bss_conf->protected_keep_alive = false; 3609 } 3610 3611 /* set assoc capability (AID was already set earlier), 3612 * ieee80211_set_associated() will tell the driver */ 3613 bss_conf->assoc_capability = capab_info; 3614 ieee80211_set_associated(sdata, cbss, changed); 3615 3616 /* 3617 * If we're using 4-addr mode, let the AP know that we're 3618 * doing so, so that it can create the STA VLAN on its side 3619 */ 3620 if (ifmgd->use_4addr) 3621 ieee80211_send_4addr_nullfunc(local, sdata); 3622 3623 /* 3624 * Start timer to probe the connection to the AP now. 3625 * Also start the timer that will detect beacon loss. 3626 */ 3627 ieee80211_sta_reset_beacon_monitor(sdata); 3628 ieee80211_sta_reset_conn_monitor(sdata); 3629 3630 ret = true; 3631 out: 3632 kfree(bss_ies); 3633 return ret; 3634 } 3635 3636 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3637 struct ieee80211_mgmt *mgmt, 3638 size_t len) 3639 { 3640 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3641 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3642 u16 capab_info, status_code, aid; 3643 struct ieee802_11_elems elems; 3644 int ac, uapsd_queues = -1; 3645 u8 *pos; 3646 bool reassoc; 3647 struct cfg80211_bss *cbss; 3648 struct ieee80211_event event = { 3649 .type = MLME_EVENT, 3650 .u.mlme.data = ASSOC_EVENT, 3651 }; 3652 struct ieee80211_prep_tx_info info = {}; 3653 3654 sdata_assert_lock(sdata); 3655 3656 if (!assoc_data) 3657 return; 3658 3659 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3660 return; 3661 3662 cbss = assoc_data->bss; 3663 3664 /* 3665 * AssocResp and ReassocResp have identical structure, so process both 3666 * of them in this function. 3667 */ 3668 3669 if (len < 24 + 6) 3670 return; 3671 3672 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3673 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3674 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3675 pos = mgmt->u.assoc_resp.variable; 3676 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3677 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3678 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3679 aid = 0; /* TODO */ 3680 } 3681 3682 /* 3683 * Note: this may not be perfect, AP might misbehave - if 3684 * anyone needs to rely on perfect complete notification 3685 * with the exact right subtype, then we need to track what 3686 * we actually transmitted. 3687 */ 3688 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3689 IEEE80211_STYPE_ASSOC_REQ; 3690 3691 sdata_info(sdata, 3692 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3693 reassoc ? "Rea" : "A", mgmt->sa, 3694 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3695 3696 if (assoc_data->fils_kek_len && 3697 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3698 return; 3699 3700 ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, 3701 mgmt->bssid, assoc_data->bss->bssid); 3702 3703 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3704 elems.timeout_int && 3705 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3706 u32 tu, ms; 3707 tu = le32_to_cpu(elems.timeout_int->value); 3708 ms = tu * 1024 / 1000; 3709 sdata_info(sdata, 3710 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3711 mgmt->sa, tu, ms); 3712 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3713 assoc_data->timeout_started = true; 3714 if (ms > IEEE80211_ASSOC_TIMEOUT) 3715 run_again(sdata, assoc_data->timeout); 3716 goto notify_driver; 3717 } 3718 3719 if (status_code != WLAN_STATUS_SUCCESS) { 3720 sdata_info(sdata, "%pM denied association (code=%d)\n", 3721 mgmt->sa, status_code); 3722 ieee80211_destroy_assoc_data(sdata, false, false); 3723 event.u.mlme.status = MLME_DENIED; 3724 event.u.mlme.reason = status_code; 3725 drv_event_callback(sdata->local, sdata, &event); 3726 } else { 3727 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) { 3728 /* oops -- internal error -- send timeout for now */ 3729 ieee80211_destroy_assoc_data(sdata, false, false); 3730 cfg80211_assoc_timeout(sdata->dev, cbss); 3731 goto notify_driver; 3732 } 3733 event.u.mlme.status = MLME_SUCCESS; 3734 drv_event_callback(sdata->local, sdata, &event); 3735 sdata_info(sdata, "associated\n"); 3736 3737 /* 3738 * destroy assoc_data afterwards, as otherwise an idle 3739 * recalc after assoc_data is NULL but before associated 3740 * is set can cause the interface to go idle 3741 */ 3742 ieee80211_destroy_assoc_data(sdata, true, false); 3743 3744 /* get uapsd queues configuration */ 3745 uapsd_queues = 0; 3746 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3747 if (sdata->tx_conf[ac].uapsd) 3748 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3749 3750 info.success = 1; 3751 } 3752 3753 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3754 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3755 notify_driver: 3756 drv_mgd_complete_tx(sdata->local, sdata, &info); 3757 } 3758 3759 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3760 struct ieee80211_mgmt *mgmt, size_t len, 3761 struct ieee80211_rx_status *rx_status) 3762 { 3763 struct ieee80211_local *local = sdata->local; 3764 struct ieee80211_bss *bss; 3765 struct ieee80211_channel *channel; 3766 3767 sdata_assert_lock(sdata); 3768 3769 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3770 ieee80211_rx_status_to_khz(rx_status)); 3771 if (!channel) 3772 return; 3773 3774 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3775 if (bss) { 3776 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3777 ieee80211_rx_bss_put(local, bss); 3778 } 3779 } 3780 3781 3782 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3783 struct sk_buff *skb) 3784 { 3785 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3786 struct ieee80211_if_managed *ifmgd; 3787 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3788 struct ieee80211_channel *channel; 3789 size_t baselen, len = skb->len; 3790 3791 ifmgd = &sdata->u.mgd; 3792 3793 sdata_assert_lock(sdata); 3794 3795 /* 3796 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3797 * "If a 6 GHz AP receives a Probe Request frame and responds with 3798 * a Probe Response frame [..], the Address 1 field of the Probe 3799 * Response frame shall be set to the broadcast address [..]" 3800 * So, on 6GHz band we should also accept broadcast responses. 3801 */ 3802 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3803 rx_status->freq); 3804 if (!channel) 3805 return; 3806 3807 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3808 (channel->band != NL80211_BAND_6GHZ || 3809 !is_broadcast_ether_addr(mgmt->da))) 3810 return; /* ignore ProbeResp to foreign address */ 3811 3812 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3813 if (baselen > len) 3814 return; 3815 3816 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3817 3818 if (ifmgd->associated && 3819 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3820 ieee80211_reset_ap_probe(sdata); 3821 } 3822 3823 /* 3824 * This is the canonical list of information elements we care about, 3825 * the filter code also gives us all changes to the Microsoft OUI 3826 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3827 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3828 * changes to requested client power. 3829 * 3830 * We implement beacon filtering in software since that means we can 3831 * avoid processing the frame here and in cfg80211, and userspace 3832 * will not be able to tell whether the hardware supports it or not. 3833 * 3834 * XXX: This list needs to be dynamic -- userspace needs to be able to 3835 * add items it requires. It also needs to be able to tell us to 3836 * look out for other vendor IEs. 3837 */ 3838 static const u64 care_about_ies = 3839 (1ULL << WLAN_EID_COUNTRY) | 3840 (1ULL << WLAN_EID_ERP_INFO) | 3841 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3842 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3843 (1ULL << WLAN_EID_HT_CAPABILITY) | 3844 (1ULL << WLAN_EID_HT_OPERATION) | 3845 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3846 3847 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3848 struct ieee80211_if_managed *ifmgd, 3849 struct ieee80211_bss_conf *bss_conf, 3850 struct ieee80211_local *local, 3851 struct ieee80211_rx_status *rx_status) 3852 { 3853 /* Track average RSSI from the Beacon frames of the current AP */ 3854 3855 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3856 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3857 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3858 ifmgd->last_cqm_event_signal = 0; 3859 ifmgd->count_beacon_signal = 1; 3860 ifmgd->last_ave_beacon_signal = 0; 3861 } else { 3862 ifmgd->count_beacon_signal++; 3863 } 3864 3865 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3866 3867 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3868 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3869 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3870 int last_sig = ifmgd->last_ave_beacon_signal; 3871 struct ieee80211_event event = { 3872 .type = RSSI_EVENT, 3873 }; 3874 3875 /* 3876 * if signal crosses either of the boundaries, invoke callback 3877 * with appropriate parameters 3878 */ 3879 if (sig > ifmgd->rssi_max_thold && 3880 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3881 ifmgd->last_ave_beacon_signal = sig; 3882 event.u.rssi.data = RSSI_EVENT_HIGH; 3883 drv_event_callback(local, sdata, &event); 3884 } else if (sig < ifmgd->rssi_min_thold && 3885 (last_sig >= ifmgd->rssi_max_thold || 3886 last_sig == 0)) { 3887 ifmgd->last_ave_beacon_signal = sig; 3888 event.u.rssi.data = RSSI_EVENT_LOW; 3889 drv_event_callback(local, sdata, &event); 3890 } 3891 } 3892 3893 if (bss_conf->cqm_rssi_thold && 3894 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3895 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3896 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3897 int last_event = ifmgd->last_cqm_event_signal; 3898 int thold = bss_conf->cqm_rssi_thold; 3899 int hyst = bss_conf->cqm_rssi_hyst; 3900 3901 if (sig < thold && 3902 (last_event == 0 || sig < last_event - hyst)) { 3903 ifmgd->last_cqm_event_signal = sig; 3904 ieee80211_cqm_rssi_notify( 3905 &sdata->vif, 3906 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3907 sig, GFP_KERNEL); 3908 } else if (sig > thold && 3909 (last_event == 0 || sig > last_event + hyst)) { 3910 ifmgd->last_cqm_event_signal = sig; 3911 ieee80211_cqm_rssi_notify( 3912 &sdata->vif, 3913 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3914 sig, GFP_KERNEL); 3915 } 3916 } 3917 3918 if (bss_conf->cqm_rssi_low && 3919 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3920 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3921 int last_event = ifmgd->last_cqm_event_signal; 3922 int low = bss_conf->cqm_rssi_low; 3923 int high = bss_conf->cqm_rssi_high; 3924 3925 if (sig < low && 3926 (last_event == 0 || last_event >= low)) { 3927 ifmgd->last_cqm_event_signal = sig; 3928 ieee80211_cqm_rssi_notify( 3929 &sdata->vif, 3930 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3931 sig, GFP_KERNEL); 3932 } else if (sig > high && 3933 (last_event == 0 || last_event <= high)) { 3934 ifmgd->last_cqm_event_signal = sig; 3935 ieee80211_cqm_rssi_notify( 3936 &sdata->vif, 3937 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3938 sig, GFP_KERNEL); 3939 } 3940 } 3941 } 3942 3943 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3944 struct cfg80211_bss *bss) 3945 { 3946 if (ether_addr_equal(tx_bssid, bss->bssid)) 3947 return true; 3948 if (!bss->transmitted_bss) 3949 return false; 3950 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3951 } 3952 3953 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3954 struct ieee80211_hdr *hdr, size_t len, 3955 struct ieee80211_rx_status *rx_status) 3956 { 3957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3958 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3959 struct ieee80211_mgmt *mgmt = (void *) hdr; 3960 size_t baselen; 3961 struct ieee802_11_elems elems; 3962 struct ieee80211_local *local = sdata->local; 3963 struct ieee80211_chanctx_conf *chanctx_conf; 3964 struct ieee80211_channel *chan; 3965 struct sta_info *sta; 3966 u32 changed = 0; 3967 bool erp_valid; 3968 u8 erp_value = 0; 3969 u32 ncrc = 0; 3970 u8 *bssid, *variable = mgmt->u.beacon.variable; 3971 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3972 3973 sdata_assert_lock(sdata); 3974 3975 /* Process beacon from the current BSS */ 3976 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 3977 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 3978 struct ieee80211_ext *ext = (void *) mgmt; 3979 3980 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 3981 variable = ext->u.s1g_short_beacon.variable; 3982 else 3983 variable = ext->u.s1g_beacon.variable; 3984 } 3985 3986 baselen = (u8 *) variable - (u8 *) mgmt; 3987 if (baselen > len) 3988 return; 3989 3990 rcu_read_lock(); 3991 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3992 if (!chanctx_conf) { 3993 rcu_read_unlock(); 3994 return; 3995 } 3996 3997 if (ieee80211_rx_status_to_khz(rx_status) != 3998 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 3999 rcu_read_unlock(); 4000 return; 4001 } 4002 chan = chanctx_conf->def.chan; 4003 rcu_read_unlock(); 4004 4005 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4006 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4007 ieee802_11_parse_elems(variable, 4008 len - baselen, false, &elems, 4009 bssid, 4010 ifmgd->assoc_data->bss->bssid); 4011 4012 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4013 4014 if (elems.dtim_period) 4015 ifmgd->dtim_period = elems.dtim_period; 4016 ifmgd->have_beacon = true; 4017 ifmgd->assoc_data->need_beacon = false; 4018 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4019 sdata->vif.bss_conf.sync_tsf = 4020 le64_to_cpu(mgmt->u.beacon.timestamp); 4021 sdata->vif.bss_conf.sync_device_ts = 4022 rx_status->device_timestamp; 4023 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4024 } 4025 4026 if (elems.mbssid_config_ie) 4027 bss_conf->profile_periodicity = 4028 elems.mbssid_config_ie->profile_periodicity; 4029 else 4030 bss_conf->profile_periodicity = 0; 4031 4032 if (elems.ext_capab_len >= 11 && 4033 (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4034 bss_conf->ema_ap = true; 4035 else 4036 bss_conf->ema_ap = false; 4037 4038 /* continue assoc process */ 4039 ifmgd->assoc_data->timeout = jiffies; 4040 ifmgd->assoc_data->timeout_started = true; 4041 run_again(sdata, ifmgd->assoc_data->timeout); 4042 return; 4043 } 4044 4045 if (!ifmgd->associated || 4046 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4047 return; 4048 bssid = ifmgd->associated->bssid; 4049 4050 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4051 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4052 local, rx_status); 4053 4054 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4055 mlme_dbg_ratelimited(sdata, 4056 "cancelling AP probe due to a received beacon\n"); 4057 ieee80211_reset_ap_probe(sdata); 4058 } 4059 4060 /* 4061 * Push the beacon loss detection into the future since 4062 * we are processing a beacon from the AP just now. 4063 */ 4064 ieee80211_sta_reset_beacon_monitor(sdata); 4065 4066 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4067 * element (which carries the beacon interval). Don't forget to add a 4068 * bit to care_about_ies[] above if mac80211 is interested in a 4069 * changing S1G element. 4070 */ 4071 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4072 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4073 ncrc = ieee802_11_parse_elems_crc(variable, 4074 len - baselen, false, &elems, 4075 care_about_ies, ncrc, 4076 mgmt->bssid, bssid); 4077 4078 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4079 ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { 4080 if (local->hw.conf.dynamic_ps_timeout > 0) { 4081 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4082 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4083 ieee80211_hw_config(local, 4084 IEEE80211_CONF_CHANGE_PS); 4085 } 4086 ieee80211_send_nullfunc(local, sdata, false); 4087 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4088 local->pspolling = true; 4089 4090 /* 4091 * Here is assumed that the driver will be 4092 * able to send ps-poll frame and receive a 4093 * response even though power save mode is 4094 * enabled, but some drivers might require 4095 * to disable power save here. This needs 4096 * to be investigated. 4097 */ 4098 ieee80211_send_pspoll(local, sdata); 4099 } 4100 } 4101 4102 if (sdata->vif.p2p || 4103 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4104 struct ieee80211_p2p_noa_attr noa = {}; 4105 int ret; 4106 4107 ret = cfg80211_get_p2p_attr(variable, 4108 len - baselen, 4109 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4110 (u8 *) &noa, sizeof(noa)); 4111 if (ret >= 2) { 4112 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4113 /* valid noa_attr and index changed */ 4114 sdata->u.mgd.p2p_noa_index = noa.index; 4115 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4116 changed |= BSS_CHANGED_P2P_PS; 4117 /* 4118 * make sure we update all information, the CRC 4119 * mechanism doesn't look at P2P attributes. 4120 */ 4121 ifmgd->beacon_crc_valid = false; 4122 } 4123 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4124 /* noa_attr not found and we had valid noa_attr before */ 4125 sdata->u.mgd.p2p_noa_index = -1; 4126 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4127 changed |= BSS_CHANGED_P2P_PS; 4128 ifmgd->beacon_crc_valid = false; 4129 } 4130 } 4131 4132 if (ifmgd->csa_waiting_bcn) 4133 ieee80211_chswitch_post_beacon(sdata); 4134 4135 /* 4136 * Update beacon timing and dtim count on every beacon appearance. This 4137 * will allow the driver to use the most updated values. Do it before 4138 * comparing this one with last received beacon. 4139 * IMPORTANT: These parameters would possibly be out of sync by the time 4140 * the driver will use them. The synchronized view is currently 4141 * guaranteed only in certain callbacks. 4142 */ 4143 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4144 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4145 sdata->vif.bss_conf.sync_tsf = 4146 le64_to_cpu(mgmt->u.beacon.timestamp); 4147 sdata->vif.bss_conf.sync_device_ts = 4148 rx_status->device_timestamp; 4149 sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; 4150 } 4151 4152 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4153 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4154 return; 4155 ifmgd->beacon_crc = ncrc; 4156 ifmgd->beacon_crc_valid = true; 4157 4158 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4159 4160 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4161 rx_status->device_timestamp, 4162 &elems, true); 4163 4164 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4165 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 4166 elems.wmm_param_len, 4167 elems.mu_edca_param_set)) 4168 changed |= BSS_CHANGED_QOS; 4169 4170 /* 4171 * If we haven't had a beacon before, tell the driver about the 4172 * DTIM period (and beacon timing if desired) now. 4173 */ 4174 if (!ifmgd->have_beacon) { 4175 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4176 bss_conf->dtim_period = elems.dtim_period ?: 1; 4177 4178 changed |= BSS_CHANGED_BEACON_INFO; 4179 ifmgd->have_beacon = true; 4180 4181 mutex_lock(&local->iflist_mtx); 4182 ieee80211_recalc_ps(local); 4183 mutex_unlock(&local->iflist_mtx); 4184 4185 ieee80211_recalc_ps_vif(sdata); 4186 } 4187 4188 if (elems.erp_info) { 4189 erp_valid = true; 4190 erp_value = elems.erp_info[0]; 4191 } else { 4192 erp_valid = false; 4193 } 4194 4195 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4196 changed |= ieee80211_handle_bss_capability(sdata, 4197 le16_to_cpu(mgmt->u.beacon.capab_info), 4198 erp_valid, erp_value); 4199 4200 mutex_lock(&local->sta_mtx); 4201 sta = sta_info_get(sdata, bssid); 4202 4203 changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); 4204 4205 if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, 4206 elems.vht_cap_elem, elems.ht_operation, 4207 elems.vht_operation, elems.he_operation, 4208 elems.s1g_oper, bssid, &changed)) { 4209 mutex_unlock(&local->sta_mtx); 4210 sdata_info(sdata, 4211 "failed to follow AP %pM bandwidth change, disconnect\n", 4212 bssid); 4213 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4214 WLAN_REASON_DEAUTH_LEAVING, 4215 true, deauth_buf); 4216 ieee80211_report_disconnect(sdata, deauth_buf, 4217 sizeof(deauth_buf), true, 4218 WLAN_REASON_DEAUTH_LEAVING, 4219 false); 4220 return; 4221 } 4222 4223 if (sta && elems.opmode_notif) 4224 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 4225 rx_status->band); 4226 mutex_unlock(&local->sta_mtx); 4227 4228 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4229 elems.country_elem, 4230 elems.country_elem_len, 4231 elems.pwr_constr_elem, 4232 elems.cisco_dtpc_elem); 4233 4234 ieee80211_bss_info_change_notify(sdata, changed); 4235 } 4236 4237 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4238 struct sk_buff *skb) 4239 { 4240 struct ieee80211_rx_status *rx_status; 4241 struct ieee80211_hdr *hdr; 4242 u16 fc; 4243 4244 rx_status = (struct ieee80211_rx_status *) skb->cb; 4245 hdr = (struct ieee80211_hdr *) skb->data; 4246 fc = le16_to_cpu(hdr->frame_control); 4247 4248 sdata_lock(sdata); 4249 switch (fc & IEEE80211_FCTL_STYPE) { 4250 case IEEE80211_STYPE_S1G_BEACON: 4251 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4252 break; 4253 } 4254 sdata_unlock(sdata); 4255 } 4256 4257 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4258 struct sk_buff *skb) 4259 { 4260 struct ieee80211_rx_status *rx_status; 4261 struct ieee80211_mgmt *mgmt; 4262 u16 fc; 4263 struct ieee802_11_elems elems; 4264 int ies_len; 4265 4266 rx_status = (struct ieee80211_rx_status *) skb->cb; 4267 mgmt = (struct ieee80211_mgmt *) skb->data; 4268 fc = le16_to_cpu(mgmt->frame_control); 4269 4270 sdata_lock(sdata); 4271 4272 switch (fc & IEEE80211_FCTL_STYPE) { 4273 case IEEE80211_STYPE_BEACON: 4274 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4275 skb->len, rx_status); 4276 break; 4277 case IEEE80211_STYPE_PROBE_RESP: 4278 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4279 break; 4280 case IEEE80211_STYPE_AUTH: 4281 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4282 break; 4283 case IEEE80211_STYPE_DEAUTH: 4284 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4285 break; 4286 case IEEE80211_STYPE_DISASSOC: 4287 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4288 break; 4289 case IEEE80211_STYPE_ASSOC_RESP: 4290 case IEEE80211_STYPE_REASSOC_RESP: 4291 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4292 break; 4293 case IEEE80211_STYPE_ACTION: 4294 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4295 ies_len = skb->len - 4296 offsetof(struct ieee80211_mgmt, 4297 u.action.u.chan_switch.variable); 4298 4299 if (ies_len < 0) 4300 break; 4301 4302 /* CSA IE cannot be overridden, no need for BSSID */ 4303 ieee802_11_parse_elems( 4304 mgmt->u.action.u.chan_switch.variable, 4305 ies_len, true, &elems, mgmt->bssid, NULL); 4306 4307 if (elems.parse_error) 4308 break; 4309 4310 ieee80211_sta_process_chanswitch(sdata, 4311 rx_status->mactime, 4312 rx_status->device_timestamp, 4313 &elems, false); 4314 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4315 ies_len = skb->len - 4316 offsetof(struct ieee80211_mgmt, 4317 u.action.u.ext_chan_switch.variable); 4318 4319 if (ies_len < 0) 4320 break; 4321 4322 /* 4323 * extended CSA IE can't be overridden, no need for 4324 * BSSID 4325 */ 4326 ieee802_11_parse_elems( 4327 mgmt->u.action.u.ext_chan_switch.variable, 4328 ies_len, true, &elems, mgmt->bssid, NULL); 4329 4330 if (elems.parse_error) 4331 break; 4332 4333 /* for the handling code pretend this was also an IE */ 4334 elems.ext_chansw_ie = 4335 &mgmt->u.action.u.ext_chan_switch.data; 4336 4337 ieee80211_sta_process_chanswitch(sdata, 4338 rx_status->mactime, 4339 rx_status->device_timestamp, 4340 &elems, false); 4341 } 4342 break; 4343 } 4344 sdata_unlock(sdata); 4345 } 4346 4347 static void ieee80211_sta_timer(struct timer_list *t) 4348 { 4349 struct ieee80211_sub_if_data *sdata = 4350 from_timer(sdata, t, u.mgd.timer); 4351 4352 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4353 } 4354 4355 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4356 u8 *bssid, u8 reason, bool tx) 4357 { 4358 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4359 4360 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4361 tx, frame_buf); 4362 4363 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4364 reason, false); 4365 } 4366 4367 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4368 { 4369 struct ieee80211_local *local = sdata->local; 4370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4371 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4372 u32 tx_flags = 0; 4373 u16 trans = 1; 4374 u16 status = 0; 4375 struct ieee80211_prep_tx_info info = { 4376 .subtype = IEEE80211_STYPE_AUTH, 4377 }; 4378 4379 sdata_assert_lock(sdata); 4380 4381 if (WARN_ON_ONCE(!auth_data)) 4382 return -EINVAL; 4383 4384 auth_data->tries++; 4385 4386 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4387 sdata_info(sdata, "authentication with %pM timed out\n", 4388 auth_data->bss->bssid); 4389 4390 /* 4391 * Most likely AP is not in the range so remove the 4392 * bss struct for that AP. 4393 */ 4394 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4395 4396 return -ETIMEDOUT; 4397 } 4398 4399 if (auth_data->algorithm == WLAN_AUTH_SAE) 4400 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4401 4402 drv_mgd_prepare_tx(local, sdata, &info); 4403 4404 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4405 auth_data->bss->bssid, auth_data->tries, 4406 IEEE80211_AUTH_MAX_TRIES); 4407 4408 auth_data->expected_transaction = 2; 4409 4410 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4411 trans = auth_data->sae_trans; 4412 status = auth_data->sae_status; 4413 auth_data->expected_transaction = trans; 4414 } 4415 4416 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4417 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4418 IEEE80211_TX_INTFL_MLME_CONN_TX; 4419 4420 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4421 auth_data->data, auth_data->data_len, 4422 auth_data->bss->bssid, 4423 auth_data->bss->bssid, NULL, 0, 0, 4424 tx_flags); 4425 4426 if (tx_flags == 0) { 4427 if (auth_data->algorithm == WLAN_AUTH_SAE) 4428 auth_data->timeout = jiffies + 4429 IEEE80211_AUTH_TIMEOUT_SAE; 4430 else 4431 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4432 } else { 4433 auth_data->timeout = 4434 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4435 } 4436 4437 auth_data->timeout_started = true; 4438 run_again(sdata, auth_data->timeout); 4439 4440 return 0; 4441 } 4442 4443 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4444 { 4445 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4446 struct ieee80211_local *local = sdata->local; 4447 4448 sdata_assert_lock(sdata); 4449 4450 assoc_data->tries++; 4451 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4452 sdata_info(sdata, "association with %pM timed out\n", 4453 assoc_data->bss->bssid); 4454 4455 /* 4456 * Most likely AP is not in the range so remove the 4457 * bss struct for that AP. 4458 */ 4459 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4460 4461 return -ETIMEDOUT; 4462 } 4463 4464 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4465 assoc_data->bss->bssid, assoc_data->tries, 4466 IEEE80211_ASSOC_MAX_TRIES); 4467 ieee80211_send_assoc(sdata); 4468 4469 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4470 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4471 assoc_data->timeout_started = true; 4472 run_again(sdata, assoc_data->timeout); 4473 } else { 4474 assoc_data->timeout = 4475 round_jiffies_up(jiffies + 4476 IEEE80211_ASSOC_TIMEOUT_LONG); 4477 assoc_data->timeout_started = true; 4478 run_again(sdata, assoc_data->timeout); 4479 } 4480 4481 return 0; 4482 } 4483 4484 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4485 __le16 fc, bool acked) 4486 { 4487 struct ieee80211_local *local = sdata->local; 4488 4489 sdata->u.mgd.status_fc = fc; 4490 sdata->u.mgd.status_acked = acked; 4491 sdata->u.mgd.status_received = true; 4492 4493 ieee80211_queue_work(&local->hw, &sdata->work); 4494 } 4495 4496 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4497 { 4498 struct ieee80211_local *local = sdata->local; 4499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4500 4501 sdata_lock(sdata); 4502 4503 if (ifmgd->status_received) { 4504 __le16 fc = ifmgd->status_fc; 4505 bool status_acked = ifmgd->status_acked; 4506 4507 ifmgd->status_received = false; 4508 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4509 if (status_acked) { 4510 if (ifmgd->auth_data->algorithm == 4511 WLAN_AUTH_SAE) 4512 ifmgd->auth_data->timeout = 4513 jiffies + 4514 IEEE80211_AUTH_TIMEOUT_SAE; 4515 else 4516 ifmgd->auth_data->timeout = 4517 jiffies + 4518 IEEE80211_AUTH_TIMEOUT_SHORT; 4519 run_again(sdata, ifmgd->auth_data->timeout); 4520 } else { 4521 ifmgd->auth_data->timeout = jiffies - 1; 4522 } 4523 ifmgd->auth_data->timeout_started = true; 4524 } else if (ifmgd->assoc_data && 4525 (ieee80211_is_assoc_req(fc) || 4526 ieee80211_is_reassoc_req(fc))) { 4527 if (status_acked) { 4528 ifmgd->assoc_data->timeout = 4529 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4530 run_again(sdata, ifmgd->assoc_data->timeout); 4531 } else { 4532 ifmgd->assoc_data->timeout = jiffies - 1; 4533 } 4534 ifmgd->assoc_data->timeout_started = true; 4535 } 4536 } 4537 4538 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4539 time_after(jiffies, ifmgd->auth_data->timeout)) { 4540 if (ifmgd->auth_data->done) { 4541 /* 4542 * ok ... we waited for assoc but userspace didn't, 4543 * so let's just kill the auth data 4544 */ 4545 ieee80211_destroy_auth_data(sdata, false); 4546 } else if (ieee80211_auth(sdata)) { 4547 u8 bssid[ETH_ALEN]; 4548 struct ieee80211_event event = { 4549 .type = MLME_EVENT, 4550 .u.mlme.data = AUTH_EVENT, 4551 .u.mlme.status = MLME_TIMEOUT, 4552 }; 4553 4554 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4555 4556 ieee80211_destroy_auth_data(sdata, false); 4557 4558 cfg80211_auth_timeout(sdata->dev, bssid); 4559 drv_event_callback(sdata->local, sdata, &event); 4560 } 4561 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4562 run_again(sdata, ifmgd->auth_data->timeout); 4563 4564 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4565 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4566 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4567 ieee80211_do_assoc(sdata)) { 4568 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4569 struct ieee80211_event event = { 4570 .type = MLME_EVENT, 4571 .u.mlme.data = ASSOC_EVENT, 4572 .u.mlme.status = MLME_TIMEOUT, 4573 }; 4574 4575 ieee80211_destroy_assoc_data(sdata, false, false); 4576 cfg80211_assoc_timeout(sdata->dev, bss); 4577 drv_event_callback(sdata->local, sdata, &event); 4578 } 4579 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4580 run_again(sdata, ifmgd->assoc_data->timeout); 4581 4582 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4583 ifmgd->associated) { 4584 u8 bssid[ETH_ALEN]; 4585 int max_tries; 4586 4587 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4588 4589 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4590 max_tries = max_nullfunc_tries; 4591 else 4592 max_tries = max_probe_tries; 4593 4594 /* ACK received for nullfunc probing frame */ 4595 if (!ifmgd->probe_send_count) 4596 ieee80211_reset_ap_probe(sdata); 4597 else if (ifmgd->nullfunc_failed) { 4598 if (ifmgd->probe_send_count < max_tries) { 4599 mlme_dbg(sdata, 4600 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4601 bssid, ifmgd->probe_send_count, 4602 max_tries); 4603 ieee80211_mgd_probe_ap_send(sdata); 4604 } else { 4605 mlme_dbg(sdata, 4606 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4607 bssid); 4608 ieee80211_sta_connection_lost(sdata, bssid, 4609 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4610 false); 4611 } 4612 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4613 run_again(sdata, ifmgd->probe_timeout); 4614 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4615 mlme_dbg(sdata, 4616 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4617 bssid, probe_wait_ms); 4618 ieee80211_sta_connection_lost(sdata, bssid, 4619 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4620 } else if (ifmgd->probe_send_count < max_tries) { 4621 mlme_dbg(sdata, 4622 "No probe response from AP %pM after %dms, try %d/%i\n", 4623 bssid, probe_wait_ms, 4624 ifmgd->probe_send_count, max_tries); 4625 ieee80211_mgd_probe_ap_send(sdata); 4626 } else { 4627 /* 4628 * We actually lost the connection ... or did we? 4629 * Let's make sure! 4630 */ 4631 mlme_dbg(sdata, 4632 "No probe response from AP %pM after %dms, disconnecting.\n", 4633 bssid, probe_wait_ms); 4634 4635 ieee80211_sta_connection_lost(sdata, bssid, 4636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4637 } 4638 } 4639 4640 sdata_unlock(sdata); 4641 } 4642 4643 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4644 { 4645 struct ieee80211_sub_if_data *sdata = 4646 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4648 4649 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4650 return; 4651 4652 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4653 return; 4654 4655 sdata->u.mgd.connection_loss = false; 4656 ieee80211_queue_work(&sdata->local->hw, 4657 &sdata->u.mgd.beacon_connection_loss_work); 4658 } 4659 4660 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4661 { 4662 struct ieee80211_sub_if_data *sdata = 4663 from_timer(sdata, t, u.mgd.conn_mon_timer); 4664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4665 struct ieee80211_local *local = sdata->local; 4666 struct sta_info *sta; 4667 unsigned long timeout; 4668 4669 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4670 return; 4671 4672 sta = sta_info_get(sdata, ifmgd->bssid); 4673 if (!sta) 4674 return; 4675 4676 timeout = sta->status_stats.last_ack; 4677 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4678 timeout = sta->rx_stats.last_rx; 4679 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4680 4681 /* If timeout is after now, then update timer to fire at 4682 * the later date, but do not actually probe at this time. 4683 */ 4684 if (time_is_after_jiffies(timeout)) { 4685 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4686 return; 4687 } 4688 4689 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4690 } 4691 4692 static void ieee80211_sta_monitor_work(struct work_struct *work) 4693 { 4694 struct ieee80211_sub_if_data *sdata = 4695 container_of(work, struct ieee80211_sub_if_data, 4696 u.mgd.monitor_work); 4697 4698 ieee80211_mgd_probe_ap(sdata, false); 4699 } 4700 4701 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4702 { 4703 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4704 __ieee80211_stop_poll(sdata); 4705 4706 /* let's probe the connection once */ 4707 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4708 ieee80211_queue_work(&sdata->local->hw, 4709 &sdata->u.mgd.monitor_work); 4710 } 4711 } 4712 4713 #ifdef CONFIG_PM 4714 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4715 { 4716 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4717 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4718 4719 sdata_lock(sdata); 4720 4721 if (ifmgd->auth_data || ifmgd->assoc_data) { 4722 const u8 *bssid = ifmgd->auth_data ? 4723 ifmgd->auth_data->bss->bssid : 4724 ifmgd->assoc_data->bss->bssid; 4725 4726 /* 4727 * If we are trying to authenticate / associate while suspending, 4728 * cfg80211 won't know and won't actually abort those attempts, 4729 * thus we need to do that ourselves. 4730 */ 4731 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4732 IEEE80211_STYPE_DEAUTH, 4733 WLAN_REASON_DEAUTH_LEAVING, 4734 false, frame_buf); 4735 if (ifmgd->assoc_data) 4736 ieee80211_destroy_assoc_data(sdata, false, true); 4737 if (ifmgd->auth_data) 4738 ieee80211_destroy_auth_data(sdata, false); 4739 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4740 IEEE80211_DEAUTH_FRAME_LEN, 4741 false); 4742 } 4743 4744 /* This is a bit of a hack - we should find a better and more generic 4745 * solution to this. Normally when suspending, cfg80211 will in fact 4746 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4747 * auth (not so important) or assoc (this is the problem) process. 4748 * 4749 * As a consequence, it can happen that we are in the process of both 4750 * associating and suspending, and receive an association response 4751 * after cfg80211 has checked if it needs to disconnect, but before 4752 * we actually set the flag to drop incoming frames. This will then 4753 * cause the workqueue flush to process the association response in 4754 * the suspend, resulting in a successful association just before it 4755 * tries to remove the interface from the driver, which now though 4756 * has a channel context assigned ... this results in issues. 4757 * 4758 * To work around this (for now) simply deauth here again if we're 4759 * now connected. 4760 */ 4761 if (ifmgd->associated && !sdata->local->wowlan) { 4762 u8 bssid[ETH_ALEN]; 4763 struct cfg80211_deauth_request req = { 4764 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4765 .bssid = bssid, 4766 }; 4767 4768 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4769 ieee80211_mgd_deauth(sdata, &req); 4770 } 4771 4772 sdata_unlock(sdata); 4773 } 4774 4775 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4776 { 4777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4778 4779 sdata_lock(sdata); 4780 if (!ifmgd->associated) { 4781 sdata_unlock(sdata); 4782 return; 4783 } 4784 4785 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4786 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4787 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4788 ieee80211_sta_connection_lost(sdata, 4789 ifmgd->associated->bssid, 4790 WLAN_REASON_UNSPECIFIED, 4791 true); 4792 sdata_unlock(sdata); 4793 return; 4794 } 4795 sdata_unlock(sdata); 4796 } 4797 #endif 4798 4799 /* interface setup */ 4800 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4801 { 4802 struct ieee80211_if_managed *ifmgd; 4803 4804 ifmgd = &sdata->u.mgd; 4805 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4806 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4807 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4808 ieee80211_beacon_connection_loss_work); 4809 INIT_WORK(&ifmgd->csa_connection_drop_work, 4810 ieee80211_csa_connection_drop_work); 4811 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4812 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4813 ieee80211_tdls_peer_del_work); 4814 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4815 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4816 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4817 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4818 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4819 ieee80211_sta_handle_tspec_ac_params_wk); 4820 4821 ifmgd->flags = 0; 4822 ifmgd->powersave = sdata->wdev.ps; 4823 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4824 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4825 ifmgd->p2p_noa_index = -1; 4826 4827 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4828 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4829 else 4830 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4831 4832 /* Setup TDLS data */ 4833 spin_lock_init(&ifmgd->teardown_lock); 4834 ifmgd->teardown_skb = NULL; 4835 ifmgd->orig_teardown_skb = NULL; 4836 } 4837 4838 /* scan finished notification */ 4839 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4840 { 4841 struct ieee80211_sub_if_data *sdata; 4842 4843 /* Restart STA timers */ 4844 rcu_read_lock(); 4845 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4846 if (ieee80211_sdata_running(sdata)) 4847 ieee80211_restart_sta_timer(sdata); 4848 } 4849 rcu_read_unlock(); 4850 } 4851 4852 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4853 struct cfg80211_bss *cbss) 4854 { 4855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4856 const u8 *ht_cap_ie, *vht_cap_ie; 4857 const struct ieee80211_ht_cap *ht_cap; 4858 const struct ieee80211_vht_cap *vht_cap; 4859 u8 chains = 1; 4860 4861 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4862 return chains; 4863 4864 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4865 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4866 ht_cap = (void *)(ht_cap_ie + 2); 4867 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4868 /* 4869 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4870 * "Tx Unequal Modulation Supported" fields. 4871 */ 4872 } 4873 4874 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4875 return chains; 4876 4877 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4878 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4879 u8 nss; 4880 u16 tx_mcs_map; 4881 4882 vht_cap = (void *)(vht_cap_ie + 2); 4883 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4884 for (nss = 8; nss > 0; nss--) { 4885 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4886 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4887 break; 4888 } 4889 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4890 chains = max(chains, nss); 4891 } 4892 4893 return chains; 4894 } 4895 4896 static bool 4897 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4898 struct ieee80211_supported_band *sband, 4899 const struct ieee80211_he_operation *he_op) 4900 { 4901 const struct ieee80211_sta_he_cap *sta_he_cap = 4902 ieee80211_get_he_iftype_cap(sband, 4903 ieee80211_vif_type_p2p(&sdata->vif)); 4904 u16 ap_min_req_set; 4905 int i; 4906 4907 if (!sta_he_cap || !he_op) 4908 return false; 4909 4910 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4911 4912 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4913 for (i = 0; i < 3; i++) { 4914 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4915 &sta_he_cap->he_mcs_nss_supp; 4916 u16 sta_mcs_map_rx = 4917 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4918 u16 sta_mcs_map_tx = 4919 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4920 u8 nss; 4921 bool verified = true; 4922 4923 /* 4924 * For each band there is a maximum of 8 spatial streams 4925 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4926 * of 2 bits per NSS (1-8), with the values defined in enum 4927 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4928 * capabilities aren't less than the AP's minimum requirements 4929 * for this HE BSS per SS. 4930 * It is enough to find one such band that meets the reqs. 4931 */ 4932 for (nss = 8; nss > 0; nss--) { 4933 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4934 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4935 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4936 4937 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4938 continue; 4939 4940 /* 4941 * Make sure the HE AP doesn't require MCSs that aren't 4942 * supported by the client 4943 */ 4944 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4945 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4946 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 4947 verified = false; 4948 break; 4949 } 4950 } 4951 4952 if (verified) 4953 return true; 4954 } 4955 4956 /* If here, STA doesn't meet AP's HE min requirements */ 4957 return false; 4958 } 4959 4960 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4961 struct cfg80211_bss *cbss) 4962 { 4963 struct ieee80211_local *local = sdata->local; 4964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4965 const struct ieee80211_ht_cap *ht_cap = NULL; 4966 const struct ieee80211_ht_operation *ht_oper = NULL; 4967 const struct ieee80211_vht_operation *vht_oper = NULL; 4968 const struct ieee80211_he_operation *he_oper = NULL; 4969 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 4970 struct ieee80211_supported_band *sband; 4971 struct cfg80211_chan_def chandef; 4972 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4973 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4974 struct ieee80211_bss *bss = (void *)cbss->priv; 4975 int ret; 4976 u32 i; 4977 bool have_80mhz; 4978 4979 sband = local->hw.wiphy->bands[cbss->channel->band]; 4980 4981 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4982 IEEE80211_STA_DISABLE_80P80MHZ | 4983 IEEE80211_STA_DISABLE_160MHZ); 4984 4985 /* disable HT/VHT/HE if we don't support them */ 4986 if (!sband->ht_cap.ht_supported && !is_6ghz) { 4987 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4988 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4989 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4990 } 4991 4992 if (!sband->vht_cap.vht_supported && is_5ghz) { 4993 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4994 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 4995 } 4996 4997 if (!ieee80211_get_he_iftype_cap(sband, 4998 ieee80211_vif_type_p2p(&sdata->vif))) 4999 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5000 5001 rcu_read_lock(); 5002 5003 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5004 const u8 *ht_oper_ie, *ht_cap_ie; 5005 5006 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 5007 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 5008 ht_oper = (void *)(ht_oper_ie + 2); 5009 5010 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 5011 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 5012 ht_cap = (void *)(ht_cap_ie + 2); 5013 5014 if (!ht_cap) { 5015 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5016 ht_oper = NULL; 5017 } 5018 } 5019 5020 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5021 const u8 *vht_oper_ie, *vht_cap; 5022 5023 vht_oper_ie = ieee80211_bss_get_ie(cbss, 5024 WLAN_EID_VHT_OPERATION); 5025 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 5026 vht_oper = (void *)(vht_oper_ie + 2); 5027 if (vht_oper && !ht_oper) { 5028 vht_oper = NULL; 5029 sdata_info(sdata, 5030 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5031 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5032 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5033 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5034 } 5035 5036 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 5037 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 5038 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5039 vht_oper = NULL; 5040 } 5041 } 5042 5043 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5044 const struct cfg80211_bss_ies *ies; 5045 const u8 *he_oper_ie; 5046 5047 ies = rcu_dereference(cbss->ies); 5048 he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION, 5049 ies->data, ies->len); 5050 if (he_oper_ie && 5051 he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3])) 5052 he_oper = (void *)(he_oper_ie + 3); 5053 else 5054 he_oper = NULL; 5055 5056 if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5057 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5058 } 5059 5060 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5061 have_80mhz = false; 5062 for (i = 0; i < sband->n_channels; i++) { 5063 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5064 IEEE80211_CHAN_NO_80MHZ)) 5065 continue; 5066 5067 have_80mhz = true; 5068 break; 5069 } 5070 5071 if (!have_80mhz) 5072 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5073 5074 if (sband->band == NL80211_BAND_S1GHZ) { 5075 const u8 *s1g_oper_ie; 5076 5077 s1g_oper_ie = ieee80211_bss_get_ie(cbss, 5078 WLAN_EID_S1G_OPERATION); 5079 if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper)) 5080 s1g_oper = (void *)(s1g_oper_ie + 2); 5081 else 5082 sdata_info(sdata, 5083 "AP missing S1G operation element?\n"); 5084 } 5085 5086 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5087 cbss->channel, 5088 bss->vht_cap_info, 5089 ht_oper, vht_oper, he_oper, 5090 s1g_oper, 5091 &chandef, false); 5092 5093 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5094 local->rx_chains); 5095 5096 rcu_read_unlock(); 5097 5098 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5099 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5100 return -EINVAL; 5101 } 5102 5103 /* will change later if needed */ 5104 sdata->smps_mode = IEEE80211_SMPS_OFF; 5105 5106 mutex_lock(&local->mtx); 5107 /* 5108 * If this fails (possibly due to channel context sharing 5109 * on incompatible channels, e.g. 80+80 and 160 sharing the 5110 * same control channel) try to use a smaller bandwidth. 5111 */ 5112 ret = ieee80211_vif_use_channel(sdata, &chandef, 5113 IEEE80211_CHANCTX_SHARED); 5114 5115 /* don't downgrade for 5 and 10 MHz channels, though. */ 5116 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5117 chandef.width == NL80211_CHAN_WIDTH_10) 5118 goto out; 5119 5120 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5121 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5122 ret = ieee80211_vif_use_channel(sdata, &chandef, 5123 IEEE80211_CHANCTX_SHARED); 5124 } 5125 out: 5126 mutex_unlock(&local->mtx); 5127 return ret; 5128 } 5129 5130 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5131 u8 *dtim_count, u8 *dtim_period) 5132 { 5133 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5134 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5135 ies->len); 5136 const struct ieee80211_tim_ie *tim = NULL; 5137 const struct ieee80211_bssid_index *idx; 5138 bool valid = tim_ie && tim_ie[1] >= 2; 5139 5140 if (valid) 5141 tim = (void *)(tim_ie + 2); 5142 5143 if (dtim_count) 5144 *dtim_count = valid ? tim->dtim_count : 0; 5145 5146 if (dtim_period) 5147 *dtim_period = valid ? tim->dtim_period : 0; 5148 5149 /* Check if value is overridden by non-transmitted profile */ 5150 if (!idx_ie || idx_ie[1] < 3) 5151 return valid; 5152 5153 idx = (void *)(idx_ie + 2); 5154 5155 if (dtim_count) 5156 *dtim_count = idx->dtim_count; 5157 5158 if (dtim_period) 5159 *dtim_period = idx->dtim_period; 5160 5161 return true; 5162 } 5163 5164 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5165 struct cfg80211_bss *cbss, bool assoc, 5166 bool override) 5167 { 5168 struct ieee80211_local *local = sdata->local; 5169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5170 struct ieee80211_bss *bss = (void *)cbss->priv; 5171 struct sta_info *new_sta = NULL; 5172 struct ieee80211_supported_band *sband; 5173 bool have_sta = false; 5174 int err; 5175 5176 sband = local->hw.wiphy->bands[cbss->channel->band]; 5177 5178 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5179 return -EINVAL; 5180 5181 /* If a reconfig is happening, bail out */ 5182 if (local->in_reconfig) 5183 return -EBUSY; 5184 5185 if (assoc) { 5186 rcu_read_lock(); 5187 have_sta = sta_info_get(sdata, cbss->bssid); 5188 rcu_read_unlock(); 5189 } 5190 5191 if (!have_sta) { 5192 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5193 if (!new_sta) 5194 return -ENOMEM; 5195 } 5196 5197 /* 5198 * Set up the information for the new channel before setting the 5199 * new channel. We can't - completely race-free - change the basic 5200 * rates bitmap and the channel (sband) that it refers to, but if 5201 * we set it up before we at least avoid calling into the driver's 5202 * bss_info_changed() method with invalid information (since we do 5203 * call that from changing the channel - only for IDLE and perhaps 5204 * some others, but ...). 5205 * 5206 * So to avoid that, just set up all the new information before the 5207 * channel, but tell the driver to apply it only afterwards, since 5208 * it might need the new channel for that. 5209 */ 5210 if (new_sta) { 5211 u32 rates = 0, basic_rates = 0; 5212 bool have_higher_than_11mbit; 5213 int min_rate = INT_MAX, min_rate_index = -1; 5214 const struct cfg80211_bss_ies *ies; 5215 int shift = ieee80211_vif_get_shift(&sdata->vif); 5216 5217 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5218 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5219 ieee80211_s1g_sta_rate_init(new_sta); 5220 goto skip_rates; 5221 } 5222 5223 ieee80211_get_rates(sband, bss->supp_rates, 5224 bss->supp_rates_len, 5225 &rates, &basic_rates, 5226 &have_higher_than_11mbit, 5227 &min_rate, &min_rate_index, 5228 shift); 5229 5230 /* 5231 * This used to be a workaround for basic rates missing 5232 * in the association response frame. Now that we no 5233 * longer use the basic rates from there, it probably 5234 * doesn't happen any more, but keep the workaround so 5235 * in case some *other* APs are buggy in different ways 5236 * we can connect -- with a warning. 5237 * Allow this workaround only in case the AP provided at least 5238 * one rate. 5239 */ 5240 if (min_rate_index < 0) { 5241 sdata_info(sdata, 5242 "No legacy rates in association response\n"); 5243 5244 sta_info_free(local, new_sta); 5245 return -EINVAL; 5246 } else if (!basic_rates) { 5247 sdata_info(sdata, 5248 "No basic rates, using min rate instead\n"); 5249 basic_rates = BIT(min_rate_index); 5250 } 5251 5252 if (rates) 5253 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5254 else 5255 sdata_info(sdata, 5256 "No rates found, keeping mandatory only\n"); 5257 5258 sdata->vif.bss_conf.basic_rates = basic_rates; 5259 5260 /* cf. IEEE 802.11 9.2.12 */ 5261 if (cbss->channel->band == NL80211_BAND_2GHZ && 5262 have_higher_than_11mbit) 5263 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5264 else 5265 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5266 5267 skip_rates: 5268 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5269 5270 /* set timing information */ 5271 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5272 rcu_read_lock(); 5273 ies = rcu_dereference(cbss->beacon_ies); 5274 if (ies) { 5275 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5276 sdata->vif.bss_conf.sync_device_ts = 5277 bss->device_ts_beacon; 5278 5279 ieee80211_get_dtim(ies, 5280 &sdata->vif.bss_conf.sync_dtim_count, 5281 NULL); 5282 } else if (!ieee80211_hw_check(&sdata->local->hw, 5283 TIMING_BEACON_ONLY)) { 5284 ies = rcu_dereference(cbss->proberesp_ies); 5285 /* must be non-NULL since beacon IEs were NULL */ 5286 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5287 sdata->vif.bss_conf.sync_device_ts = 5288 bss->device_ts_presp; 5289 sdata->vif.bss_conf.sync_dtim_count = 0; 5290 } else { 5291 sdata->vif.bss_conf.sync_tsf = 0; 5292 sdata->vif.bss_conf.sync_device_ts = 0; 5293 sdata->vif.bss_conf.sync_dtim_count = 0; 5294 } 5295 rcu_read_unlock(); 5296 } 5297 5298 if (new_sta || override) { 5299 err = ieee80211_prep_channel(sdata, cbss); 5300 if (err) { 5301 if (new_sta) 5302 sta_info_free(local, new_sta); 5303 return -EINVAL; 5304 } 5305 } 5306 5307 if (new_sta) { 5308 /* 5309 * tell driver about BSSID, basic rates and timing 5310 * this was set up above, before setting the channel 5311 */ 5312 ieee80211_bss_info_change_notify(sdata, 5313 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5314 BSS_CHANGED_BEACON_INT); 5315 5316 if (assoc) 5317 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5318 5319 err = sta_info_insert(new_sta); 5320 new_sta = NULL; 5321 if (err) { 5322 sdata_info(sdata, 5323 "failed to insert STA entry for the AP (error %d)\n", 5324 err); 5325 return err; 5326 } 5327 } else 5328 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5329 5330 /* Cancel scan to ensure that nothing interferes with connection */ 5331 if (local->scanning) 5332 ieee80211_scan_cancel(local); 5333 5334 return 0; 5335 } 5336 5337 /* config hooks */ 5338 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5339 struct cfg80211_auth_request *req) 5340 { 5341 struct ieee80211_local *local = sdata->local; 5342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5343 struct ieee80211_mgd_auth_data *auth_data; 5344 u16 auth_alg; 5345 int err; 5346 bool cont_auth; 5347 5348 /* prepare auth data structure */ 5349 5350 switch (req->auth_type) { 5351 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5352 auth_alg = WLAN_AUTH_OPEN; 5353 break; 5354 case NL80211_AUTHTYPE_SHARED_KEY: 5355 if (fips_enabled) 5356 return -EOPNOTSUPP; 5357 auth_alg = WLAN_AUTH_SHARED_KEY; 5358 break; 5359 case NL80211_AUTHTYPE_FT: 5360 auth_alg = WLAN_AUTH_FT; 5361 break; 5362 case NL80211_AUTHTYPE_NETWORK_EAP: 5363 auth_alg = WLAN_AUTH_LEAP; 5364 break; 5365 case NL80211_AUTHTYPE_SAE: 5366 auth_alg = WLAN_AUTH_SAE; 5367 break; 5368 case NL80211_AUTHTYPE_FILS_SK: 5369 auth_alg = WLAN_AUTH_FILS_SK; 5370 break; 5371 case NL80211_AUTHTYPE_FILS_SK_PFS: 5372 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5373 break; 5374 case NL80211_AUTHTYPE_FILS_PK: 5375 auth_alg = WLAN_AUTH_FILS_PK; 5376 break; 5377 default: 5378 return -EOPNOTSUPP; 5379 } 5380 5381 if (ifmgd->assoc_data) 5382 return -EBUSY; 5383 5384 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5385 req->ie_len, GFP_KERNEL); 5386 if (!auth_data) 5387 return -ENOMEM; 5388 5389 auth_data->bss = req->bss; 5390 5391 if (req->auth_data_len >= 4) { 5392 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5393 __le16 *pos = (__le16 *) req->auth_data; 5394 5395 auth_data->sae_trans = le16_to_cpu(pos[0]); 5396 auth_data->sae_status = le16_to_cpu(pos[1]); 5397 } 5398 memcpy(auth_data->data, req->auth_data + 4, 5399 req->auth_data_len - 4); 5400 auth_data->data_len += req->auth_data_len - 4; 5401 } 5402 5403 /* Check if continuing authentication or trying to authenticate with the 5404 * same BSS that we were in the process of authenticating with and avoid 5405 * removal and re-addition of the STA entry in 5406 * ieee80211_prep_connection(). 5407 */ 5408 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5409 5410 if (req->ie && req->ie_len) { 5411 memcpy(&auth_data->data[auth_data->data_len], 5412 req->ie, req->ie_len); 5413 auth_data->data_len += req->ie_len; 5414 } 5415 5416 if (req->key && req->key_len) { 5417 auth_data->key_len = req->key_len; 5418 auth_data->key_idx = req->key_idx; 5419 memcpy(auth_data->key, req->key, req->key_len); 5420 } 5421 5422 auth_data->algorithm = auth_alg; 5423 5424 /* try to authenticate/probe */ 5425 5426 if (ifmgd->auth_data) { 5427 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5428 auth_data->peer_confirmed = 5429 ifmgd->auth_data->peer_confirmed; 5430 } 5431 ieee80211_destroy_auth_data(sdata, cont_auth); 5432 } 5433 5434 /* prep auth_data so we don't go into idle on disassoc */ 5435 ifmgd->auth_data = auth_data; 5436 5437 /* If this is continuation of an ongoing SAE authentication exchange 5438 * (i.e., request to send SAE Confirm) and the peer has already 5439 * confirmed, mark authentication completed since we are about to send 5440 * out SAE Confirm. 5441 */ 5442 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5443 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5444 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5445 5446 if (ifmgd->associated) { 5447 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5448 5449 sdata_info(sdata, 5450 "disconnect from AP %pM for new auth to %pM\n", 5451 ifmgd->associated->bssid, req->bss->bssid); 5452 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5453 WLAN_REASON_UNSPECIFIED, 5454 false, frame_buf); 5455 5456 ieee80211_report_disconnect(sdata, frame_buf, 5457 sizeof(frame_buf), true, 5458 WLAN_REASON_UNSPECIFIED, 5459 false); 5460 } 5461 5462 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5463 5464 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5465 if (err) 5466 goto err_clear; 5467 5468 err = ieee80211_auth(sdata); 5469 if (err) { 5470 sta_info_destroy_addr(sdata, req->bss->bssid); 5471 goto err_clear; 5472 } 5473 5474 /* hold our own reference */ 5475 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5476 return 0; 5477 5478 err_clear: 5479 eth_zero_addr(ifmgd->bssid); 5480 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5481 ifmgd->auth_data = NULL; 5482 mutex_lock(&sdata->local->mtx); 5483 ieee80211_vif_release_channel(sdata); 5484 mutex_unlock(&sdata->local->mtx); 5485 kfree(auth_data); 5486 return err; 5487 } 5488 5489 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5490 struct cfg80211_assoc_request *req) 5491 { 5492 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5493 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5494 struct ieee80211_local *local = sdata->local; 5495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5496 struct ieee80211_bss *bss = (void *)req->bss->priv; 5497 struct ieee80211_mgd_assoc_data *assoc_data; 5498 const struct cfg80211_bss_ies *beacon_ies; 5499 struct ieee80211_supported_band *sband; 5500 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5501 const u8 *ssidie, *ht_ie, *vht_ie; 5502 int i, err; 5503 bool override = false; 5504 5505 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5506 if (!assoc_data) 5507 return -ENOMEM; 5508 5509 rcu_read_lock(); 5510 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 5511 if (!ssidie || ssidie[1] > sizeof(assoc_data->ssid)) { 5512 rcu_read_unlock(); 5513 kfree(assoc_data); 5514 return -EINVAL; 5515 } 5516 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 5517 assoc_data->ssid_len = ssidie[1]; 5518 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5519 bss_conf->ssid_len = assoc_data->ssid_len; 5520 rcu_read_unlock(); 5521 5522 if (ifmgd->associated) { 5523 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5524 5525 sdata_info(sdata, 5526 "disconnect from AP %pM for new assoc to %pM\n", 5527 ifmgd->associated->bssid, req->bss->bssid); 5528 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5529 WLAN_REASON_UNSPECIFIED, 5530 false, frame_buf); 5531 5532 ieee80211_report_disconnect(sdata, frame_buf, 5533 sizeof(frame_buf), true, 5534 WLAN_REASON_UNSPECIFIED, 5535 false); 5536 } 5537 5538 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5539 err = -EBUSY; 5540 goto err_free; 5541 } 5542 5543 if (ifmgd->assoc_data) { 5544 err = -EBUSY; 5545 goto err_free; 5546 } 5547 5548 if (ifmgd->auth_data) { 5549 bool match; 5550 5551 /* keep sta info, bssid if matching */ 5552 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5553 ieee80211_destroy_auth_data(sdata, match); 5554 } 5555 5556 /* prepare assoc data */ 5557 5558 ifmgd->beacon_crc_valid = false; 5559 5560 assoc_data->wmm = bss->wmm_used && 5561 (local->hw.queues >= IEEE80211_NUM_ACS); 5562 5563 /* 5564 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5565 * We still associate in non-HT mode (11a/b/g) if any one of these 5566 * ciphers is configured as pairwise. 5567 * We can set this to true for non-11n hardware, that'll be checked 5568 * separately along with the peer capabilities. 5569 */ 5570 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5571 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5572 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5573 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5574 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5575 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5576 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5577 netdev_info(sdata->dev, 5578 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5579 } 5580 } 5581 5582 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5583 5584 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5585 if (!bss->wmm_used) { 5586 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5587 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5588 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5589 netdev_info(sdata->dev, 5590 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5591 } 5592 5593 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5594 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5595 sizeof(ifmgd->ht_capa_mask)); 5596 5597 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5598 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5599 sizeof(ifmgd->vht_capa_mask)); 5600 5601 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5602 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5603 sizeof(ifmgd->s1g_capa_mask)); 5604 5605 if (req->ie && req->ie_len) { 5606 memcpy(assoc_data->ie, req->ie, req->ie_len); 5607 assoc_data->ie_len = req->ie_len; 5608 } 5609 5610 if (req->fils_kek) { 5611 /* should already be checked in cfg80211 - so warn */ 5612 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5613 err = -EINVAL; 5614 goto err_free; 5615 } 5616 memcpy(assoc_data->fils_kek, req->fils_kek, 5617 req->fils_kek_len); 5618 assoc_data->fils_kek_len = req->fils_kek_len; 5619 } 5620 5621 if (req->fils_nonces) 5622 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5623 2 * FILS_NONCE_LEN); 5624 5625 assoc_data->bss = req->bss; 5626 assoc_data->capability = req->bss->capability; 5627 assoc_data->supp_rates = bss->supp_rates; 5628 assoc_data->supp_rates_len = bss->supp_rates_len; 5629 5630 rcu_read_lock(); 5631 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 5632 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 5633 assoc_data->ap_ht_param = 5634 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 5635 else if (!is_6ghz) 5636 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5637 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 5638 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 5639 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 5640 sizeof(struct ieee80211_vht_cap)); 5641 else if (is_5ghz) 5642 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5643 IEEE80211_STA_DISABLE_HE; 5644 rcu_read_unlock(); 5645 5646 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5647 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5648 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5649 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5650 5651 if (bss->wmm_used && bss->uapsd_supported && 5652 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5653 assoc_data->uapsd = true; 5654 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5655 } else { 5656 assoc_data->uapsd = false; 5657 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5658 } 5659 5660 if (req->prev_bssid) 5661 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5662 5663 if (req->use_mfp) { 5664 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5665 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5666 } else { 5667 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5668 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5669 } 5670 5671 if (req->flags & ASSOC_REQ_USE_RRM) 5672 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5673 else 5674 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5675 5676 if (req->crypto.control_port) 5677 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5678 else 5679 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5680 5681 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5682 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5683 sdata->control_port_over_nl80211 = 5684 req->crypto.control_port_over_nl80211; 5685 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5686 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5687 sdata->vif.type); 5688 5689 /* kick off associate process */ 5690 5691 ifmgd->assoc_data = assoc_data; 5692 ifmgd->dtim_period = 0; 5693 ifmgd->have_beacon = false; 5694 5695 /* override HT/VHT configuration only if the AP and we support it */ 5696 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5697 struct ieee80211_sta_ht_cap sta_ht_cap; 5698 5699 if (req->flags & ASSOC_REQ_DISABLE_HT) 5700 override = true; 5701 5702 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5703 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5704 5705 /* check for 40 MHz disable override */ 5706 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5707 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5708 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5709 override = true; 5710 5711 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5712 req->flags & ASSOC_REQ_DISABLE_VHT) 5713 override = true; 5714 } 5715 5716 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5717 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5718 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5719 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5720 } 5721 5722 if (req->flags & ASSOC_REQ_DISABLE_VHT) 5723 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5724 5725 if (req->flags & ASSOC_REQ_DISABLE_HE) 5726 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5727 5728 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5729 if (err) 5730 goto err_clear; 5731 5732 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5733 if (ifmgd->powersave) 5734 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5735 else 5736 sdata->smps_mode = IEEE80211_SMPS_OFF; 5737 } else { 5738 sdata->smps_mode = ifmgd->req_smps; 5739 } 5740 5741 rcu_read_lock(); 5742 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5743 5744 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5745 !beacon_ies) { 5746 /* 5747 * Wait up to one beacon interval ... 5748 * should this be more if we miss one? 5749 */ 5750 sdata_info(sdata, "waiting for beacon from %pM\n", 5751 ifmgd->bssid); 5752 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5753 assoc_data->timeout_started = true; 5754 assoc_data->need_beacon = true; 5755 } else if (beacon_ies) { 5756 const struct element *elem; 5757 u8 dtim_count = 0; 5758 5759 ieee80211_get_dtim(beacon_ies, &dtim_count, 5760 &ifmgd->dtim_period); 5761 5762 ifmgd->have_beacon = true; 5763 assoc_data->timeout = jiffies; 5764 assoc_data->timeout_started = true; 5765 5766 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5767 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5768 sdata->vif.bss_conf.sync_device_ts = 5769 bss->device_ts_beacon; 5770 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5771 } 5772 5773 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5774 beacon_ies->data, beacon_ies->len); 5775 if (elem && elem->datalen >= 3) 5776 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5777 else 5778 sdata->vif.bss_conf.profile_periodicity = 0; 5779 5780 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5781 beacon_ies->data, beacon_ies->len); 5782 if (elem && elem->datalen >= 11 && 5783 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5784 sdata->vif.bss_conf.ema_ap = true; 5785 else 5786 sdata->vif.bss_conf.ema_ap = false; 5787 } else { 5788 assoc_data->timeout = jiffies; 5789 assoc_data->timeout_started = true; 5790 } 5791 rcu_read_unlock(); 5792 5793 run_again(sdata, assoc_data->timeout); 5794 5795 if (bss->corrupt_data) { 5796 char *corrupt_type = "data"; 5797 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5798 if (bss->corrupt_data & 5799 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5800 corrupt_type = "beacon and probe response"; 5801 else 5802 corrupt_type = "beacon"; 5803 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5804 corrupt_type = "probe response"; 5805 sdata_info(sdata, "associating with AP with corrupt %s\n", 5806 corrupt_type); 5807 } 5808 5809 return 0; 5810 err_clear: 5811 eth_zero_addr(ifmgd->bssid); 5812 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5813 ifmgd->assoc_data = NULL; 5814 err_free: 5815 kfree(assoc_data); 5816 return err; 5817 } 5818 5819 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5820 struct cfg80211_deauth_request *req) 5821 { 5822 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5823 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5824 bool tx = !req->local_state_change; 5825 struct ieee80211_prep_tx_info info = { 5826 .subtype = IEEE80211_STYPE_DEAUTH, 5827 }; 5828 5829 if (ifmgd->auth_data && 5830 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5831 sdata_info(sdata, 5832 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5833 req->bssid, req->reason_code, 5834 ieee80211_get_reason_code_string(req->reason_code)); 5835 5836 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5837 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5838 IEEE80211_STYPE_DEAUTH, 5839 req->reason_code, tx, 5840 frame_buf); 5841 ieee80211_destroy_auth_data(sdata, false); 5842 ieee80211_report_disconnect(sdata, frame_buf, 5843 sizeof(frame_buf), true, 5844 req->reason_code, false); 5845 drv_mgd_complete_tx(sdata->local, sdata, &info); 5846 return 0; 5847 } 5848 5849 if (ifmgd->assoc_data && 5850 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5851 sdata_info(sdata, 5852 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5853 req->bssid, req->reason_code, 5854 ieee80211_get_reason_code_string(req->reason_code)); 5855 5856 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5857 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5858 IEEE80211_STYPE_DEAUTH, 5859 req->reason_code, tx, 5860 frame_buf); 5861 ieee80211_destroy_assoc_data(sdata, false, true); 5862 ieee80211_report_disconnect(sdata, frame_buf, 5863 sizeof(frame_buf), true, 5864 req->reason_code, false); 5865 return 0; 5866 } 5867 5868 if (ifmgd->associated && 5869 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5870 sdata_info(sdata, 5871 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5872 req->bssid, req->reason_code, 5873 ieee80211_get_reason_code_string(req->reason_code)); 5874 5875 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5876 req->reason_code, tx, frame_buf); 5877 ieee80211_report_disconnect(sdata, frame_buf, 5878 sizeof(frame_buf), true, 5879 req->reason_code, false); 5880 drv_mgd_complete_tx(sdata->local, sdata, &info); 5881 return 0; 5882 } 5883 5884 return -ENOTCONN; 5885 } 5886 5887 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5888 struct cfg80211_disassoc_request *req) 5889 { 5890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5891 u8 bssid[ETH_ALEN]; 5892 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5893 5894 /* 5895 * cfg80211 should catch this ... but it's racy since 5896 * we can receive a disassoc frame, process it, hand it 5897 * to cfg80211 while that's in a locked section already 5898 * trying to tell us that the user wants to disconnect. 5899 */ 5900 if (ifmgd->associated != req->bss) 5901 return -ENOLINK; 5902 5903 sdata_info(sdata, 5904 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5905 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5906 5907 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5908 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5909 req->reason_code, !req->local_state_change, 5910 frame_buf); 5911 5912 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5913 req->reason_code, false); 5914 5915 return 0; 5916 } 5917 5918 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5919 { 5920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5921 5922 /* 5923 * Make sure some work items will not run after this, 5924 * they will not do anything but might not have been 5925 * cancelled when disconnecting. 5926 */ 5927 cancel_work_sync(&ifmgd->monitor_work); 5928 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5929 cancel_work_sync(&ifmgd->request_smps_work); 5930 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5931 cancel_work_sync(&ifmgd->chswitch_work); 5932 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5933 5934 sdata_lock(sdata); 5935 if (ifmgd->assoc_data) { 5936 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5937 ieee80211_destroy_assoc_data(sdata, false, false); 5938 cfg80211_assoc_timeout(sdata->dev, bss); 5939 } 5940 if (ifmgd->auth_data) 5941 ieee80211_destroy_auth_data(sdata, false); 5942 spin_lock_bh(&ifmgd->teardown_lock); 5943 if (ifmgd->teardown_skb) { 5944 kfree_skb(ifmgd->teardown_skb); 5945 ifmgd->teardown_skb = NULL; 5946 ifmgd->orig_teardown_skb = NULL; 5947 } 5948 kfree(ifmgd->assoc_req_ies); 5949 ifmgd->assoc_req_ies = NULL; 5950 ifmgd->assoc_req_ies_len = 0; 5951 spin_unlock_bh(&ifmgd->teardown_lock); 5952 del_timer_sync(&ifmgd->timer); 5953 sdata_unlock(sdata); 5954 } 5955 5956 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5957 enum nl80211_cqm_rssi_threshold_event rssi_event, 5958 s32 rssi_level, 5959 gfp_t gfp) 5960 { 5961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5962 5963 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 5964 5965 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 5966 } 5967 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5968 5969 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5970 { 5971 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5972 5973 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5974 5975 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5976 } 5977 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5978