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_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * We can have multiple work items (and connection probing) 93 * scheduling this timer, but we need to take care to only 94 * reschedule it when it should fire _earlier_ than it was 95 * asked for before, or if it's not pending right now. This 96 * function ensures that. Note that it then is required to 97 * run this function for all timeouts after the first one 98 * has happened -- the work that runs from this timer will 99 * do that. 100 */ 101 static void run_again(struct ieee80211_sub_if_data *sdata, 102 unsigned long timeout) 103 { 104 sdata_assert_lock(sdata); 105 106 if (!timer_pending(&sdata->u.mgd.timer) || 107 time_before(timeout, sdata->u.mgd.timer.expires)) 108 mod_timer(&sdata->u.mgd.timer, timeout); 109 } 110 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 112 { 113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 114 return; 115 116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 117 return; 118 119 mod_timer(&sdata->u.mgd.bcn_mon_timer, 120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 121 } 122 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 124 { 125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 126 127 if (unlikely(!ifmgd->associated)) 128 return; 129 130 if (ifmgd->probe_send_count) 131 ifmgd->probe_send_count = 0; 132 133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 134 return; 135 136 mod_timer(&ifmgd->conn_mon_timer, 137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 138 } 139 140 static int ecw2cw(int ecw) 141 { 142 return (1 << ecw) - 1; 143 } 144 145 static u32 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 147 struct ieee80211_supported_band *sband, 148 struct ieee80211_channel *channel, 149 u32 vht_cap_info, 150 const struct ieee80211_ht_operation *ht_oper, 151 const struct ieee80211_vht_operation *vht_oper, 152 const struct ieee80211_he_operation *he_oper, 153 const struct ieee80211_s1g_oper_ie *s1g_oper, 154 struct cfg80211_chan_def *chandef, bool tracking) 155 { 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 157 struct cfg80211_chan_def vht_chandef; 158 struct ieee80211_sta_ht_cap sta_ht_cap; 159 u32 ht_cfreq, ret; 160 161 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 162 chandef->chan = channel; 163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 164 chandef->center_freq1 = channel->center_freq; 165 chandef->freq1_offset = channel->freq_offset; 166 167 if (channel->band == NL80211_BAND_6GHZ) { 168 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) { 169 mlme_dbg(sdata, 170 "bad 6 GHz operation, disabling HT/VHT/HE\n"); 171 ret = IEEE80211_STA_DISABLE_HT | 172 IEEE80211_STA_DISABLE_VHT | 173 IEEE80211_STA_DISABLE_HE; 174 } else { 175 ret = 0; 176 } 177 vht_chandef = *chandef; 178 goto out; 179 } else if (sband->band == NL80211_BAND_S1GHZ) { 180 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 181 sdata_info(sdata, 182 "Missing S1G Operation Element? Trying operating == primary\n"); 183 chandef->width = ieee80211_s1g_channel_width(channel); 184 } 185 186 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 187 IEEE80211_STA_DISABLE_VHT | 188 IEEE80211_STA_DISABLE_80P80MHZ | 189 IEEE80211_STA_DISABLE_160MHZ; 190 goto out; 191 } 192 193 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 194 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 195 196 if (!ht_oper || !sta_ht_cap.ht_supported) { 197 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 198 ret = IEEE80211_STA_DISABLE_HT | 199 IEEE80211_STA_DISABLE_VHT | 200 IEEE80211_STA_DISABLE_HE; 201 goto out; 202 } 203 204 chandef->width = NL80211_CHAN_WIDTH_20; 205 206 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 207 channel->band); 208 /* check that channel matches the right operating channel */ 209 if (!tracking && channel->center_freq != ht_cfreq) { 210 /* 211 * It's possible that some APs are confused here; 212 * Netgear WNDR3700 sometimes reports 4 higher than 213 * the actual channel in association responses, but 214 * since we look at probe response/beacon data here 215 * it should be OK. 216 */ 217 sdata_info(sdata, 218 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 219 channel->center_freq, ht_cfreq, 220 ht_oper->primary_chan, channel->band); 221 ret = IEEE80211_STA_DISABLE_HT | 222 IEEE80211_STA_DISABLE_VHT | 223 IEEE80211_STA_DISABLE_HE; 224 goto out; 225 } 226 227 /* check 40 MHz support, if we have it */ 228 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 229 ieee80211_chandef_ht_oper(ht_oper, chandef); 230 } else { 231 mlme_dbg(sdata, "40 MHz not supported\n"); 232 /* 40 MHz (and 80 MHz) must be supported for VHT */ 233 ret = IEEE80211_STA_DISABLE_VHT; 234 /* also mark 40 MHz disabled */ 235 ret |= IEEE80211_STA_DISABLE_40MHZ; 236 goto out; 237 } 238 239 if (!vht_oper || !sband->vht_cap.vht_supported) { 240 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 241 ret = IEEE80211_STA_DISABLE_VHT; 242 goto out; 243 } 244 245 vht_chandef = *chandef; 246 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 247 (le32_to_cpu(he_oper->he_oper_params) & 248 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 249 struct ieee80211_vht_operation he_oper_vht_cap; 250 251 /* 252 * Set only first 3 bytes (other 2 aren't used in 253 * ieee80211_chandef_vht_oper() anyway) 254 */ 255 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 256 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 257 258 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 259 &he_oper_vht_cap, ht_oper, 260 &vht_chandef)) { 261 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 262 sdata_info(sdata, 263 "HE AP VHT information is invalid, disabling HE\n"); 264 ret = IEEE80211_STA_DISABLE_HE; 265 goto out; 266 } 267 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 268 vht_cap_info, 269 vht_oper, ht_oper, 270 &vht_chandef)) { 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 272 sdata_info(sdata, 273 "AP VHT information is invalid, disabling VHT\n"); 274 ret = IEEE80211_STA_DISABLE_VHT; 275 goto out; 276 } 277 278 if (!cfg80211_chandef_valid(&vht_chandef)) { 279 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 280 sdata_info(sdata, 281 "AP VHT information is invalid, disabling VHT\n"); 282 ret = IEEE80211_STA_DISABLE_VHT; 283 goto out; 284 } 285 286 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 287 ret = 0; 288 goto out; 289 } 290 291 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 292 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 293 sdata_info(sdata, 294 "AP VHT information doesn't match HT, disabling VHT\n"); 295 ret = IEEE80211_STA_DISABLE_VHT; 296 goto out; 297 } 298 299 *chandef = vht_chandef; 300 301 ret = 0; 302 303 out: 304 /* 305 * When tracking the current AP, don't do any further checks if the 306 * new chandef is identical to the one we're currently using for the 307 * connection. This keeps us from playing ping-pong with regulatory, 308 * without it the following can happen (for example): 309 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 310 * - AP advertises regdom US 311 * - CRDA loads regdom US with 80 MHz prohibited (old database) 312 * - the code below detects an unsupported channel, downgrades, and 313 * we disconnect from the AP in the caller 314 * - disconnect causes CRDA to reload world regdomain and the game 315 * starts anew. 316 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 317 * 318 * It seems possible that there are still scenarios with CSA or real 319 * bandwidth changes where a this could happen, but those cases are 320 * less common and wouldn't completely prevent using the AP. 321 */ 322 if (tracking && 323 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 324 return ret; 325 326 /* don't print the message below for VHT mismatch if VHT is disabled */ 327 if (ret & IEEE80211_STA_DISABLE_VHT) 328 vht_chandef = *chandef; 329 330 /* 331 * Ignore the DISABLED flag when we're already connected and only 332 * tracking the APs beacon for bandwidth changes - otherwise we 333 * might get disconnected here if we connect to an AP, update our 334 * regulatory information based on the AP's country IE and the 335 * information we have is wrong/outdated and disables the channel 336 * that we're actually using for the connection to the AP. 337 */ 338 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 339 tracking ? 0 : 340 IEEE80211_CHAN_DISABLED)) { 341 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 342 ret = IEEE80211_STA_DISABLE_HT | 343 IEEE80211_STA_DISABLE_VHT | 344 IEEE80211_STA_DISABLE_HE; 345 break; 346 } 347 348 ret |= ieee80211_chandef_downgrade(chandef); 349 } 350 351 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 352 IEEE80211_CHAN_NO_HE)) 353 ret |= IEEE80211_STA_DISABLE_HE; 354 355 if (chandef->width != vht_chandef.width && !tracking) 356 sdata_info(sdata, 357 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 358 359 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 360 return ret; 361 } 362 363 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 364 struct sta_info *sta, 365 const struct ieee80211_ht_cap *ht_cap, 366 const struct ieee80211_vht_cap *vht_cap, 367 const struct ieee80211_ht_operation *ht_oper, 368 const struct ieee80211_vht_operation *vht_oper, 369 const struct ieee80211_he_operation *he_oper, 370 const struct ieee80211_s1g_oper_ie *s1g_oper, 371 const u8 *bssid, u32 *changed) 372 { 373 struct ieee80211_local *local = sdata->local; 374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 375 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 376 struct ieee80211_supported_band *sband = 377 local->hw.wiphy->bands[chan->band]; 378 struct cfg80211_chan_def chandef; 379 u16 ht_opmode; 380 u32 flags; 381 u32 vht_cap_info = 0; 382 int ret; 383 384 /* if HT was/is disabled, don't track any bandwidth changes */ 385 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 386 return 0; 387 388 /* don't check VHT if we associated as non-VHT station */ 389 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 390 vht_oper = NULL; 391 392 /* don't check HE if we associated as non-HE station */ 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 394 !ieee80211_get_he_iftype_cap(sband, 395 ieee80211_vif_type_p2p(&sdata->vif))) 396 397 he_oper = NULL; 398 399 if (WARN_ON_ONCE(!sta)) 400 return -EINVAL; 401 402 /* 403 * if bss configuration changed store the new one - 404 * this may be applicable even if channel is identical 405 */ 406 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 407 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 408 *changed |= BSS_CHANGED_HT; 409 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 410 } 411 412 if (vht_cap) 413 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 414 415 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 416 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 417 ht_oper, vht_oper, he_oper, 418 s1g_oper, &chandef, true); 419 420 /* 421 * Downgrade the new channel if we associated with restricted 422 * capabilities. For example, if we associated as a 20 MHz STA 423 * to a 40 MHz AP (due to regulatory, capabilities or config 424 * reasons) then switching to a 40 MHz channel now won't do us 425 * any good -- we couldn't use it with the AP. 426 */ 427 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 428 chandef.width == NL80211_CHAN_WIDTH_80P80) 429 flags |= ieee80211_chandef_downgrade(&chandef); 430 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 431 chandef.width == NL80211_CHAN_WIDTH_160) 432 flags |= ieee80211_chandef_downgrade(&chandef); 433 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 434 chandef.width > NL80211_CHAN_WIDTH_20) 435 flags |= ieee80211_chandef_downgrade(&chandef); 436 437 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 438 return 0; 439 440 sdata_info(sdata, 441 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 442 "width %d (%d.%03d/%d MHz)\n", 443 ifmgd->bssid, chandef.chan->center_freq, 444 chandef.chan->freq_offset, chandef.width, 445 chandef.center_freq1, chandef.freq1_offset, 446 chandef.center_freq2); 447 448 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 449 IEEE80211_STA_DISABLE_VHT | 450 IEEE80211_STA_DISABLE_HE | 451 IEEE80211_STA_DISABLE_40MHZ | 452 IEEE80211_STA_DISABLE_80P80MHZ | 453 IEEE80211_STA_DISABLE_160MHZ)) || 454 !cfg80211_chandef_valid(&chandef)) { 455 sdata_info(sdata, 456 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 457 ifmgd->bssid, flags, ifmgd->flags); 458 return -EINVAL; 459 } 460 461 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 462 463 if (ret) { 464 sdata_info(sdata, 465 "AP %pM changed bandwidth to incompatible one - disconnect\n", 466 ifmgd->bssid); 467 return ret; 468 } 469 470 return 0; 471 } 472 473 /* frame sending functions */ 474 475 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 476 struct sk_buff *skb, u8 ap_ht_param, 477 struct ieee80211_supported_band *sband, 478 struct ieee80211_channel *channel, 479 enum ieee80211_smps_mode smps) 480 { 481 u8 *pos; 482 u32 flags = channel->flags; 483 u16 cap; 484 struct ieee80211_sta_ht_cap ht_cap; 485 486 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 487 488 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 489 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 490 491 /* determine capability flags */ 492 cap = ht_cap.cap; 493 494 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 495 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 496 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 498 cap &= ~IEEE80211_HT_CAP_SGI_40; 499 } 500 break; 501 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 502 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 503 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 504 cap &= ~IEEE80211_HT_CAP_SGI_40; 505 } 506 break; 507 } 508 509 /* 510 * If 40 MHz was disabled associate as though we weren't 511 * capable of 40 MHz -- some broken APs will never fall 512 * back to trying to transmit in 20 MHz. 513 */ 514 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 515 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 516 cap &= ~IEEE80211_HT_CAP_SGI_40; 517 } 518 519 /* set SM PS mode properly */ 520 cap &= ~IEEE80211_HT_CAP_SM_PS; 521 switch (smps) { 522 case IEEE80211_SMPS_AUTOMATIC: 523 case IEEE80211_SMPS_NUM_MODES: 524 WARN_ON(1); 525 fallthrough; 526 case IEEE80211_SMPS_OFF: 527 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 528 IEEE80211_HT_CAP_SM_PS_SHIFT; 529 break; 530 case IEEE80211_SMPS_STATIC: 531 cap |= WLAN_HT_CAP_SM_PS_STATIC << 532 IEEE80211_HT_CAP_SM_PS_SHIFT; 533 break; 534 case IEEE80211_SMPS_DYNAMIC: 535 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 536 IEEE80211_HT_CAP_SM_PS_SHIFT; 537 break; 538 } 539 540 /* reserve and fill IE */ 541 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 542 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 543 } 544 545 /* This function determines vht capability flags for the association 546 * and builds the IE. 547 * Note - the function may set the owner of the MU-MIMO capability 548 */ 549 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 550 struct sk_buff *skb, 551 struct ieee80211_supported_band *sband, 552 struct ieee80211_vht_cap *ap_vht_cap) 553 { 554 struct ieee80211_local *local = sdata->local; 555 u8 *pos; 556 u32 cap; 557 struct ieee80211_sta_vht_cap vht_cap; 558 u32 mask, ap_bf_sts, our_bf_sts; 559 560 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 561 562 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 563 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 564 565 /* determine capability flags */ 566 cap = vht_cap.cap; 567 568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 569 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 570 571 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 572 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 573 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 574 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 575 } 576 577 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 578 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 579 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 580 } 581 582 /* 583 * Some APs apparently get confused if our capabilities are better 584 * than theirs, so restrict what we advertise in the assoc request. 585 */ 586 if (!(ap_vht_cap->vht_cap_info & 587 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 588 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 589 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 590 else if (!(ap_vht_cap->vht_cap_info & 591 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 592 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 593 594 /* 595 * If some other vif is using the MU-MIMO capability we cannot associate 596 * using MU-MIMO - this will lead to contradictions in the group-id 597 * mechanism. 598 * Ownership is defined since association request, in order to avoid 599 * simultaneous associations with MU-MIMO. 600 */ 601 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 602 bool disable_mu_mimo = false; 603 struct ieee80211_sub_if_data *other; 604 605 list_for_each_entry_rcu(other, &local->interfaces, list) { 606 if (other->vif.mu_mimo_owner) { 607 disable_mu_mimo = true; 608 break; 609 } 610 } 611 if (disable_mu_mimo) 612 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 613 else 614 sdata->vif.mu_mimo_owner = true; 615 } 616 617 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 618 619 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 620 our_bf_sts = cap & mask; 621 622 if (ap_bf_sts < our_bf_sts) { 623 cap &= ~mask; 624 cap |= ap_bf_sts; 625 } 626 627 /* reserve and fill IE */ 628 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 629 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 630 } 631 632 /* This function determines HE capability flags for the association 633 * and builds the IE. 634 */ 635 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 636 struct sk_buff *skb, 637 struct ieee80211_supported_band *sband) 638 { 639 u8 *pos, *pre_he_pos; 640 const struct ieee80211_sta_he_cap *he_cap = NULL; 641 struct ieee80211_chanctx_conf *chanctx_conf; 642 u8 he_cap_size; 643 bool reg_cap = false; 644 645 rcu_read_lock(); 646 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 647 if (!WARN_ON_ONCE(!chanctx_conf)) 648 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 649 &chanctx_conf->def, 650 IEEE80211_CHAN_NO_HE); 651 652 rcu_read_unlock(); 653 654 he_cap = ieee80211_get_he_iftype_cap(sband, 655 ieee80211_vif_type_p2p(&sdata->vif)); 656 if (!he_cap || !chanctx_conf || !reg_cap) 657 return; 658 659 /* get a max size estimate */ 660 he_cap_size = 661 2 + 1 + sizeof(he_cap->he_cap_elem) + 662 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 663 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 664 he_cap->he_cap_elem.phy_cap_info); 665 pos = skb_put(skb, he_cap_size); 666 pre_he_pos = pos; 667 pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags, 668 pos, he_cap, pos + he_cap_size); 669 /* trim excess if any */ 670 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 671 672 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 673 } 674 675 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 676 { 677 struct ieee80211_local *local = sdata->local; 678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 679 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 680 struct sk_buff *skb; 681 struct ieee80211_mgmt *mgmt; 682 u8 *pos, qos_info, *ie_start; 683 size_t offset = 0, noffset; 684 int i, count, rates_len, supp_rates_len, shift; 685 u16 capab; 686 struct ieee80211_supported_band *sband; 687 struct ieee80211_chanctx_conf *chanctx_conf; 688 struct ieee80211_channel *chan; 689 u32 rates = 0; 690 __le16 listen_int; 691 struct element *ext_capa = NULL; 692 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 693 const struct ieee80211_sband_iftype_data *iftd; 694 struct ieee80211_prep_tx_info info = {}; 695 int ret; 696 697 /* we know it's writable, cast away the const */ 698 if (assoc_data->ie_len) 699 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 700 assoc_data->ie, 701 assoc_data->ie_len); 702 703 sdata_assert_lock(sdata); 704 705 rcu_read_lock(); 706 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 707 if (WARN_ON(!chanctx_conf)) { 708 rcu_read_unlock(); 709 return -EINVAL; 710 } 711 chan = chanctx_conf->def.chan; 712 rcu_read_unlock(); 713 sband = local->hw.wiphy->bands[chan->band]; 714 shift = ieee80211_vif_get_shift(&sdata->vif); 715 716 if (assoc_data->supp_rates_len) { 717 /* 718 * Get all rates supported by the device and the AP as 719 * some APs don't like getting a superset of their rates 720 * in the association request (e.g. D-Link DAP 1353 in 721 * b-only mode)... 722 */ 723 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 724 assoc_data->supp_rates, 725 assoc_data->supp_rates_len, 726 &rates); 727 } else { 728 /* 729 * In case AP not provide any supported rates information 730 * before association, we send information element(s) with 731 * all rates that we support. 732 */ 733 rates_len = 0; 734 for (i = 0; i < sband->n_bitrates; i++) { 735 rates |= BIT(i); 736 rates_len++; 737 } 738 } 739 740 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 741 742 skb = alloc_skb(local->hw.extra_tx_headroom + 743 sizeof(*mgmt) + /* bit too much but doesn't matter */ 744 2 + assoc_data->ssid_len + /* SSID */ 745 4 + rates_len + /* (extended) rates */ 746 4 + /* power capability */ 747 2 + 2 * sband->n_channels + /* supported channels */ 748 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 749 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 750 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 751 sizeof(struct ieee80211_he_mcs_nss_supp) + 752 IEEE80211_HE_PPE_THRES_MAX_LEN + 753 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 754 assoc_data->ie_len + /* extra IEs */ 755 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 756 9 + /* WMM */ 757 (iftd ? iftd->vendor_elems.len : 0), 758 GFP_KERNEL); 759 if (!skb) 760 return -ENOMEM; 761 762 skb_reserve(skb, local->hw.extra_tx_headroom); 763 764 capab = WLAN_CAPABILITY_ESS; 765 766 if (sband->band == NL80211_BAND_2GHZ) { 767 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 768 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 769 } 770 771 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 772 capab |= WLAN_CAPABILITY_PRIVACY; 773 774 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 775 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 776 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 777 778 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 779 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 780 781 mgmt = skb_put_zero(skb, 24); 782 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 783 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 784 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 785 786 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 787 ieee80211_encode_usf(local->hw.conf.listen_interval) : 788 local->hw.conf.listen_interval); 789 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 790 skb_put(skb, 10); 791 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 792 IEEE80211_STYPE_REASSOC_REQ); 793 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 794 mgmt->u.reassoc_req.listen_interval = listen_int; 795 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 796 ETH_ALEN); 797 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 798 } else { 799 skb_put(skb, 4); 800 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 801 IEEE80211_STYPE_ASSOC_REQ); 802 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 803 mgmt->u.assoc_req.listen_interval = listen_int; 804 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 805 } 806 807 /* SSID */ 808 pos = skb_put(skb, 2 + assoc_data->ssid_len); 809 ie_start = pos; 810 *pos++ = WLAN_EID_SSID; 811 *pos++ = assoc_data->ssid_len; 812 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 813 814 if (sband->band == NL80211_BAND_S1GHZ) 815 goto skip_rates; 816 817 /* add all rates which were marked to be used above */ 818 supp_rates_len = rates_len; 819 if (supp_rates_len > 8) 820 supp_rates_len = 8; 821 822 pos = skb_put(skb, supp_rates_len + 2); 823 *pos++ = WLAN_EID_SUPP_RATES; 824 *pos++ = supp_rates_len; 825 826 count = 0; 827 for (i = 0; i < sband->n_bitrates; i++) { 828 if (BIT(i) & rates) { 829 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 830 5 * (1 << shift)); 831 *pos++ = (u8) rate; 832 if (++count == 8) 833 break; 834 } 835 } 836 837 if (rates_len > count) { 838 pos = skb_put(skb, rates_len - count + 2); 839 *pos++ = WLAN_EID_EXT_SUPP_RATES; 840 *pos++ = rates_len - count; 841 842 for (i++; i < sband->n_bitrates; i++) { 843 if (BIT(i) & rates) { 844 int rate; 845 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 846 5 * (1 << shift)); 847 *pos++ = (u8) rate; 848 } 849 } 850 } 851 852 skip_rates: 853 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 854 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 855 pos = skb_put(skb, 4); 856 *pos++ = WLAN_EID_PWR_CAPABILITY; 857 *pos++ = 2; 858 *pos++ = 0; /* min tx power */ 859 /* max tx power */ 860 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 861 } 862 863 /* 864 * Per spec, we shouldn't include the list of channels if we advertise 865 * support for extended channel switching, but we've always done that; 866 * (for now?) apply this restriction only on the (new) 6 GHz band. 867 */ 868 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 869 (sband->band != NL80211_BAND_6GHZ || 870 !ext_capa || ext_capa->datalen < 1 || 871 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 872 /* TODO: get this in reg domain format */ 873 pos = skb_put(skb, 2 * sband->n_channels + 2); 874 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 875 *pos++ = 2 * sband->n_channels; 876 for (i = 0; i < sband->n_channels; i++) { 877 *pos++ = ieee80211_frequency_to_channel( 878 sband->channels[i].center_freq); 879 *pos++ = 1; /* one channel in the subband*/ 880 } 881 } 882 883 /* Set MBSSID support for HE AP if needed */ 884 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 885 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 886 ext_capa && ext_capa->datalen >= 3) 887 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 888 889 /* if present, add any custom IEs that go before HT */ 890 if (assoc_data->ie_len) { 891 static const u8 before_ht[] = { 892 WLAN_EID_SSID, 893 WLAN_EID_SUPP_RATES, 894 WLAN_EID_EXT_SUPP_RATES, 895 WLAN_EID_PWR_CAPABILITY, 896 WLAN_EID_SUPPORTED_CHANNELS, 897 WLAN_EID_RSN, 898 WLAN_EID_QOS_CAPA, 899 WLAN_EID_RRM_ENABLED_CAPABILITIES, 900 WLAN_EID_MOBILITY_DOMAIN, 901 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 902 WLAN_EID_RIC_DATA, /* reassoc only */ 903 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 904 }; 905 static const u8 after_ric[] = { 906 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 907 WLAN_EID_HT_CAPABILITY, 908 WLAN_EID_BSS_COEX_2040, 909 /* luckily this is almost always there */ 910 WLAN_EID_EXT_CAPABILITY, 911 WLAN_EID_QOS_TRAFFIC_CAPA, 912 WLAN_EID_TIM_BCAST_REQ, 913 WLAN_EID_INTERWORKING, 914 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 915 WLAN_EID_VHT_CAPABILITY, 916 WLAN_EID_OPMODE_NOTIF, 917 }; 918 919 noffset = ieee80211_ie_split_ric(assoc_data->ie, 920 assoc_data->ie_len, 921 before_ht, 922 ARRAY_SIZE(before_ht), 923 after_ric, 924 ARRAY_SIZE(after_ric), 925 offset); 926 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 927 offset = noffset; 928 } 929 930 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 931 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 932 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 933 934 if (sband->band != NL80211_BAND_6GHZ && 935 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 936 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 937 sband, chan, sdata->smps_mode); 938 939 /* if present, add any custom IEs that go before VHT */ 940 if (assoc_data->ie_len) { 941 static const u8 before_vht[] = { 942 /* 943 * no need to list the ones split off before HT 944 * or generated here 945 */ 946 WLAN_EID_BSS_COEX_2040, 947 WLAN_EID_EXT_CAPABILITY, 948 WLAN_EID_QOS_TRAFFIC_CAPA, 949 WLAN_EID_TIM_BCAST_REQ, 950 WLAN_EID_INTERWORKING, 951 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 952 }; 953 954 /* RIC already taken above, so no need to handle here anymore */ 955 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 956 before_vht, ARRAY_SIZE(before_vht), 957 offset); 958 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 959 offset = noffset; 960 } 961 962 /* if present, add any custom IEs that go before HE */ 963 if (assoc_data->ie_len) { 964 static const u8 before_he[] = { 965 /* 966 * no need to list the ones split off before VHT 967 * or generated here 968 */ 969 WLAN_EID_OPMODE_NOTIF, 970 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 971 /* 11ai elements */ 972 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 973 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 974 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 975 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 976 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 977 /* TODO: add 11ah/11aj/11ak elements */ 978 }; 979 980 /* RIC already taken above, so no need to handle here anymore */ 981 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 982 before_he, ARRAY_SIZE(before_he), 983 offset); 984 pos = skb_put(skb, noffset - offset); 985 memcpy(pos, assoc_data->ie + offset, noffset - offset); 986 offset = noffset; 987 } 988 989 if (sband->band != NL80211_BAND_6GHZ && 990 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 991 ieee80211_add_vht_ie(sdata, skb, sband, 992 &assoc_data->ap_vht_cap); 993 994 /* 995 * If AP doesn't support HT, mark HE as disabled. 996 * If on the 5GHz band, make sure it supports VHT. 997 */ 998 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 999 (sband->band == NL80211_BAND_5GHZ && 1000 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1001 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 1002 1003 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 1004 ieee80211_add_he_ie(sdata, skb, sband); 1005 1006 /* if present, add any custom non-vendor IEs that go after HE */ 1007 if (assoc_data->ie_len) { 1008 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1009 assoc_data->ie_len, 1010 offset); 1011 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1012 offset = noffset; 1013 } 1014 1015 if (assoc_data->wmm) { 1016 if (assoc_data->uapsd) { 1017 qos_info = ifmgd->uapsd_queues; 1018 qos_info |= (ifmgd->uapsd_max_sp_len << 1019 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1020 } else { 1021 qos_info = 0; 1022 } 1023 1024 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1025 } 1026 1027 if (sband->band == NL80211_BAND_S1GHZ) { 1028 ieee80211_add_aid_request_ie(sdata, skb); 1029 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1030 } 1031 1032 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1033 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1034 1035 /* add any remaining custom (i.e. vendor specific here) IEs */ 1036 if (assoc_data->ie_len) { 1037 noffset = assoc_data->ie_len; 1038 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1039 } 1040 1041 if (assoc_data->fils_kek_len) { 1042 ret = fils_encrypt_assoc_req(skb, assoc_data); 1043 if (ret < 0) { 1044 dev_kfree_skb(skb); 1045 return ret; 1046 } 1047 } 1048 1049 pos = skb_tail_pointer(skb); 1050 kfree(ifmgd->assoc_req_ies); 1051 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1052 if (!ifmgd->assoc_req_ies) { 1053 dev_kfree_skb(skb); 1054 return -ENOMEM; 1055 } 1056 1057 ifmgd->assoc_req_ies_len = pos - ie_start; 1058 1059 drv_mgd_prepare_tx(local, sdata, &info); 1060 1061 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1062 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1063 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1064 IEEE80211_TX_INTFL_MLME_CONN_TX; 1065 ieee80211_tx_skb(sdata, skb); 1066 1067 return 0; 1068 } 1069 1070 void ieee80211_send_pspoll(struct ieee80211_local *local, 1071 struct ieee80211_sub_if_data *sdata) 1072 { 1073 struct ieee80211_pspoll *pspoll; 1074 struct sk_buff *skb; 1075 1076 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1077 if (!skb) 1078 return; 1079 1080 pspoll = (struct ieee80211_pspoll *) skb->data; 1081 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1082 1083 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1084 ieee80211_tx_skb(sdata, skb); 1085 } 1086 1087 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1088 struct ieee80211_sub_if_data *sdata, 1089 bool powersave) 1090 { 1091 struct sk_buff *skb; 1092 struct ieee80211_hdr_3addr *nullfunc; 1093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1094 1095 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1096 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1097 if (!skb) 1098 return; 1099 1100 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1101 if (powersave) 1102 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1103 1104 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1105 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1106 1107 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1108 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1109 1110 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1111 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1112 1113 ieee80211_tx_skb(sdata, skb); 1114 } 1115 1116 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1117 struct ieee80211_sub_if_data *sdata) 1118 { 1119 struct sk_buff *skb; 1120 struct ieee80211_hdr *nullfunc; 1121 __le16 fc; 1122 1123 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1124 return; 1125 1126 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1127 if (!skb) 1128 return; 1129 1130 skb_reserve(skb, local->hw.extra_tx_headroom); 1131 1132 nullfunc = skb_put_zero(skb, 30); 1133 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1134 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1135 nullfunc->frame_control = fc; 1136 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1137 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1138 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1139 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1140 1141 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1142 ieee80211_tx_skb(sdata, skb); 1143 } 1144 1145 /* spectrum management related things */ 1146 static void ieee80211_chswitch_work(struct work_struct *work) 1147 { 1148 struct ieee80211_sub_if_data *sdata = 1149 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1150 struct ieee80211_local *local = sdata->local; 1151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1152 int ret; 1153 1154 if (!ieee80211_sdata_running(sdata)) 1155 return; 1156 1157 sdata_lock(sdata); 1158 mutex_lock(&local->mtx); 1159 mutex_lock(&local->chanctx_mtx); 1160 1161 if (!ifmgd->associated) 1162 goto out; 1163 1164 if (!sdata->vif.csa_active) 1165 goto out; 1166 1167 /* 1168 * using reservation isn't immediate as it may be deferred until later 1169 * with multi-vif. once reservation is complete it will re-schedule the 1170 * work with no reserved_chanctx so verify chandef to check if it 1171 * completed successfully 1172 */ 1173 1174 if (sdata->reserved_chanctx) { 1175 /* 1176 * with multi-vif csa driver may call ieee80211_csa_finish() 1177 * many times while waiting for other interfaces to use their 1178 * reservations 1179 */ 1180 if (sdata->reserved_ready) 1181 goto out; 1182 1183 ret = ieee80211_vif_use_reserved_context(sdata); 1184 if (ret) { 1185 sdata_info(sdata, 1186 "failed to use reserved channel context, disconnecting (err=%d)\n", 1187 ret); 1188 ieee80211_queue_work(&sdata->local->hw, 1189 &ifmgd->csa_connection_drop_work); 1190 goto out; 1191 } 1192 1193 goto out; 1194 } 1195 1196 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1197 &sdata->csa_chandef)) { 1198 sdata_info(sdata, 1199 "failed to finalize channel switch, disconnecting\n"); 1200 ieee80211_queue_work(&sdata->local->hw, 1201 &ifmgd->csa_connection_drop_work); 1202 goto out; 1203 } 1204 1205 ifmgd->csa_waiting_bcn = true; 1206 1207 ieee80211_sta_reset_beacon_monitor(sdata); 1208 ieee80211_sta_reset_conn_monitor(sdata); 1209 1210 out: 1211 mutex_unlock(&local->chanctx_mtx); 1212 mutex_unlock(&local->mtx); 1213 sdata_unlock(sdata); 1214 } 1215 1216 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1217 { 1218 struct ieee80211_local *local = sdata->local; 1219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1220 int ret; 1221 1222 sdata_assert_lock(sdata); 1223 1224 WARN_ON(!sdata->vif.csa_active); 1225 1226 if (sdata->csa_block_tx) { 1227 ieee80211_wake_vif_queues(local, sdata, 1228 IEEE80211_QUEUE_STOP_REASON_CSA); 1229 sdata->csa_block_tx = false; 1230 } 1231 1232 sdata->vif.csa_active = false; 1233 ifmgd->csa_waiting_bcn = false; 1234 /* 1235 * If the CSA IE is still present on the beacon after the switch, 1236 * we need to consider it as a new CSA (possibly to self). 1237 */ 1238 ifmgd->beacon_crc_valid = false; 1239 1240 ret = drv_post_channel_switch(sdata); 1241 if (ret) { 1242 sdata_info(sdata, 1243 "driver post channel switch failed, disconnecting\n"); 1244 ieee80211_queue_work(&local->hw, 1245 &ifmgd->csa_connection_drop_work); 1246 return; 1247 } 1248 1249 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1250 } 1251 1252 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1253 { 1254 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1256 1257 trace_api_chswitch_done(sdata, success); 1258 if (!success) { 1259 sdata_info(sdata, 1260 "driver channel switch failed, disconnecting\n"); 1261 ieee80211_queue_work(&sdata->local->hw, 1262 &ifmgd->csa_connection_drop_work); 1263 } else { 1264 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1265 } 1266 } 1267 EXPORT_SYMBOL(ieee80211_chswitch_done); 1268 1269 static void ieee80211_chswitch_timer(struct timer_list *t) 1270 { 1271 struct ieee80211_sub_if_data *sdata = 1272 from_timer(sdata, t, u.mgd.chswitch_timer); 1273 1274 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1275 } 1276 1277 static void 1278 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1279 { 1280 struct ieee80211_local *local = sdata->local; 1281 1282 if (!local->ops->abort_channel_switch) 1283 return; 1284 1285 mutex_lock(&local->mtx); 1286 1287 mutex_lock(&local->chanctx_mtx); 1288 ieee80211_vif_unreserve_chanctx(sdata); 1289 mutex_unlock(&local->chanctx_mtx); 1290 1291 if (sdata->csa_block_tx) 1292 ieee80211_wake_vif_queues(local, sdata, 1293 IEEE80211_QUEUE_STOP_REASON_CSA); 1294 1295 sdata->csa_block_tx = false; 1296 sdata->vif.csa_active = false; 1297 1298 mutex_unlock(&local->mtx); 1299 1300 drv_abort_channel_switch(sdata); 1301 } 1302 1303 static void 1304 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1305 u64 timestamp, u32 device_timestamp, 1306 struct ieee802_11_elems *elems, 1307 bool beacon) 1308 { 1309 struct ieee80211_local *local = sdata->local; 1310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1311 struct cfg80211_bss *cbss = ifmgd->associated; 1312 struct ieee80211_chanctx_conf *conf; 1313 struct ieee80211_chanctx *chanctx; 1314 enum nl80211_band current_band; 1315 struct ieee80211_csa_ie csa_ie; 1316 struct ieee80211_channel_switch ch_switch; 1317 struct ieee80211_bss *bss; 1318 int res; 1319 1320 sdata_assert_lock(sdata); 1321 1322 if (!cbss) 1323 return; 1324 1325 if (local->scanning) 1326 return; 1327 1328 current_band = cbss->channel->band; 1329 bss = (void *)cbss->priv; 1330 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1331 bss->vht_cap_info, 1332 ifmgd->flags, 1333 ifmgd->associated->bssid, &csa_ie); 1334 1335 if (!res) { 1336 ch_switch.timestamp = timestamp; 1337 ch_switch.device_timestamp = device_timestamp; 1338 ch_switch.block_tx = csa_ie.mode; 1339 ch_switch.chandef = csa_ie.chandef; 1340 ch_switch.count = csa_ie.count; 1341 ch_switch.delay = csa_ie.max_switch_time; 1342 } 1343 1344 if (res < 0) 1345 goto lock_and_drop_connection; 1346 1347 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1348 if (res) 1349 ieee80211_sta_abort_chanswitch(sdata); 1350 else 1351 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1352 return; 1353 } else if (sdata->vif.csa_active || res) { 1354 /* disregard subsequent announcements if already processing */ 1355 return; 1356 } 1357 1358 if (sdata->vif.bss_conf.chandef.chan->band != 1359 csa_ie.chandef.chan->band) { 1360 sdata_info(sdata, 1361 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1362 ifmgd->associated->bssid, 1363 csa_ie.chandef.chan->center_freq, 1364 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1365 csa_ie.chandef.center_freq2); 1366 goto lock_and_drop_connection; 1367 } 1368 1369 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1370 IEEE80211_CHAN_DISABLED)) { 1371 sdata_info(sdata, 1372 "AP %pM switches to unsupported channel " 1373 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1374 "disconnecting\n", 1375 ifmgd->associated->bssid, 1376 csa_ie.chandef.chan->center_freq, 1377 csa_ie.chandef.chan->freq_offset, 1378 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1379 csa_ie.chandef.freq1_offset, 1380 csa_ie.chandef.center_freq2); 1381 goto lock_and_drop_connection; 1382 } 1383 1384 if (cfg80211_chandef_identical(&csa_ie.chandef, 1385 &sdata->vif.bss_conf.chandef) && 1386 (!csa_ie.mode || !beacon)) { 1387 if (ifmgd->csa_ignored_same_chan) 1388 return; 1389 sdata_info(sdata, 1390 "AP %pM tries to chanswitch to same channel, ignore\n", 1391 ifmgd->associated->bssid); 1392 ifmgd->csa_ignored_same_chan = true; 1393 return; 1394 } 1395 1396 /* 1397 * Drop all TDLS peers - either we disconnect or move to a different 1398 * channel from this point on. There's no telling what our peer will do. 1399 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1400 * have an incompatible wider chandef. 1401 */ 1402 ieee80211_teardown_tdls_peers(sdata); 1403 1404 mutex_lock(&local->mtx); 1405 mutex_lock(&local->chanctx_mtx); 1406 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1407 lockdep_is_held(&local->chanctx_mtx)); 1408 if (!conf) { 1409 sdata_info(sdata, 1410 "no channel context assigned to vif?, disconnecting\n"); 1411 goto drop_connection; 1412 } 1413 1414 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1415 1416 if (local->use_chanctx && 1417 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1418 sdata_info(sdata, 1419 "driver doesn't support chan-switch with channel contexts\n"); 1420 goto drop_connection; 1421 } 1422 1423 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1424 sdata_info(sdata, 1425 "preparing for channel switch failed, disconnecting\n"); 1426 goto drop_connection; 1427 } 1428 1429 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1430 chanctx->mode, false); 1431 if (res) { 1432 sdata_info(sdata, 1433 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1434 res); 1435 goto drop_connection; 1436 } 1437 mutex_unlock(&local->chanctx_mtx); 1438 1439 sdata->vif.csa_active = true; 1440 sdata->csa_chandef = csa_ie.chandef; 1441 sdata->csa_block_tx = csa_ie.mode; 1442 ifmgd->csa_ignored_same_chan = false; 1443 ifmgd->beacon_crc_valid = false; 1444 1445 if (sdata->csa_block_tx) 1446 ieee80211_stop_vif_queues(local, sdata, 1447 IEEE80211_QUEUE_STOP_REASON_CSA); 1448 mutex_unlock(&local->mtx); 1449 1450 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1451 csa_ie.count, csa_ie.mode); 1452 1453 if (local->ops->channel_switch) { 1454 /* use driver's channel switch callback */ 1455 drv_channel_switch(local, sdata, &ch_switch); 1456 return; 1457 } 1458 1459 /* channel switch handled in software */ 1460 if (csa_ie.count <= 1) 1461 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1462 else 1463 mod_timer(&ifmgd->chswitch_timer, 1464 TU_TO_EXP_TIME((csa_ie.count - 1) * 1465 cbss->beacon_interval)); 1466 return; 1467 lock_and_drop_connection: 1468 mutex_lock(&local->mtx); 1469 mutex_lock(&local->chanctx_mtx); 1470 drop_connection: 1471 /* 1472 * This is just so that the disconnect flow will know that 1473 * we were trying to switch channel and failed. In case the 1474 * mode is 1 (we are not allowed to Tx), we will know not to 1475 * send a deauthentication frame. Those two fields will be 1476 * reset when the disconnection worker runs. 1477 */ 1478 sdata->vif.csa_active = true; 1479 sdata->csa_block_tx = csa_ie.mode; 1480 1481 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1482 mutex_unlock(&local->chanctx_mtx); 1483 mutex_unlock(&local->mtx); 1484 } 1485 1486 static bool 1487 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1488 struct ieee80211_channel *channel, 1489 const u8 *country_ie, u8 country_ie_len, 1490 const u8 *pwr_constr_elem, 1491 int *chan_pwr, int *pwr_reduction) 1492 { 1493 struct ieee80211_country_ie_triplet *triplet; 1494 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1495 int i, chan_increment; 1496 bool have_chan_pwr = false; 1497 1498 /* Invalid IE */ 1499 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1500 return false; 1501 1502 triplet = (void *)(country_ie + 3); 1503 country_ie_len -= 3; 1504 1505 switch (channel->band) { 1506 default: 1507 WARN_ON_ONCE(1); 1508 fallthrough; 1509 case NL80211_BAND_2GHZ: 1510 case NL80211_BAND_60GHZ: 1511 case NL80211_BAND_LC: 1512 chan_increment = 1; 1513 break; 1514 case NL80211_BAND_5GHZ: 1515 chan_increment = 4; 1516 break; 1517 case NL80211_BAND_6GHZ: 1518 /* 1519 * In the 6 GHz band, the "maximum transmit power level" 1520 * field in the triplets is reserved, and thus will be 1521 * zero and we shouldn't use it to control TX power. 1522 * The actual TX power will be given in the transmit 1523 * power envelope element instead. 1524 */ 1525 return false; 1526 } 1527 1528 /* find channel */ 1529 while (country_ie_len >= 3) { 1530 u8 first_channel = triplet->chans.first_channel; 1531 1532 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1533 goto next; 1534 1535 for (i = 0; i < triplet->chans.num_channels; i++) { 1536 if (first_channel + i * chan_increment == chan) { 1537 have_chan_pwr = true; 1538 *chan_pwr = triplet->chans.max_power; 1539 break; 1540 } 1541 } 1542 if (have_chan_pwr) 1543 break; 1544 1545 next: 1546 triplet++; 1547 country_ie_len -= 3; 1548 } 1549 1550 if (have_chan_pwr && pwr_constr_elem) 1551 *pwr_reduction = *pwr_constr_elem; 1552 else 1553 *pwr_reduction = 0; 1554 1555 return have_chan_pwr; 1556 } 1557 1558 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1559 struct ieee80211_channel *channel, 1560 const u8 *cisco_dtpc_ie, 1561 int *pwr_level) 1562 { 1563 /* From practical testing, the first data byte of the DTPC element 1564 * seems to contain the requested dBm level, and the CLI on Cisco 1565 * APs clearly state the range is -127 to 127 dBm, which indicates 1566 * a signed byte, although it seemingly never actually goes negative. 1567 * The other byte seems to always be zero. 1568 */ 1569 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1570 } 1571 1572 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1573 struct ieee80211_channel *channel, 1574 struct ieee80211_mgmt *mgmt, 1575 const u8 *country_ie, u8 country_ie_len, 1576 const u8 *pwr_constr_ie, 1577 const u8 *cisco_dtpc_ie) 1578 { 1579 bool has_80211h_pwr = false, has_cisco_pwr = false; 1580 int chan_pwr = 0, pwr_reduction_80211h = 0; 1581 int pwr_level_cisco, pwr_level_80211h; 1582 int new_ap_level; 1583 __le16 capab = mgmt->u.probe_resp.capab_info; 1584 1585 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1586 return 0; /* TODO */ 1587 1588 if (country_ie && 1589 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1590 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1591 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1592 sdata, channel, country_ie, country_ie_len, 1593 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1594 pwr_level_80211h = 1595 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1596 } 1597 1598 if (cisco_dtpc_ie) { 1599 ieee80211_find_cisco_dtpc( 1600 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1601 has_cisco_pwr = true; 1602 } 1603 1604 if (!has_80211h_pwr && !has_cisco_pwr) 1605 return 0; 1606 1607 /* If we have both 802.11h and Cisco DTPC, apply both limits 1608 * by picking the smallest of the two power levels advertised. 1609 */ 1610 if (has_80211h_pwr && 1611 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1612 new_ap_level = pwr_level_80211h; 1613 1614 if (sdata->ap_power_level == new_ap_level) 1615 return 0; 1616 1617 sdata_dbg(sdata, 1618 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1619 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1620 sdata->u.mgd.bssid); 1621 } else { /* has_cisco_pwr is always true here. */ 1622 new_ap_level = pwr_level_cisco; 1623 1624 if (sdata->ap_power_level == new_ap_level) 1625 return 0; 1626 1627 sdata_dbg(sdata, 1628 "Limiting TX power to %d dBm as advertised by %pM\n", 1629 pwr_level_cisco, sdata->u.mgd.bssid); 1630 } 1631 1632 sdata->ap_power_level = new_ap_level; 1633 if (__ieee80211_recalc_txpower(sdata)) 1634 return BSS_CHANGED_TXPOWER; 1635 return 0; 1636 } 1637 1638 /* powersave */ 1639 static void ieee80211_enable_ps(struct ieee80211_local *local, 1640 struct ieee80211_sub_if_data *sdata) 1641 { 1642 struct ieee80211_conf *conf = &local->hw.conf; 1643 1644 /* 1645 * If we are scanning right now then the parameters will 1646 * take effect when scan finishes. 1647 */ 1648 if (local->scanning) 1649 return; 1650 1651 if (conf->dynamic_ps_timeout > 0 && 1652 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1653 mod_timer(&local->dynamic_ps_timer, jiffies + 1654 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1655 } else { 1656 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1657 ieee80211_send_nullfunc(local, sdata, true); 1658 1659 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1660 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1661 return; 1662 1663 conf->flags |= IEEE80211_CONF_PS; 1664 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1665 } 1666 } 1667 1668 static void ieee80211_change_ps(struct ieee80211_local *local) 1669 { 1670 struct ieee80211_conf *conf = &local->hw.conf; 1671 1672 if (local->ps_sdata) { 1673 ieee80211_enable_ps(local, local->ps_sdata); 1674 } else if (conf->flags & IEEE80211_CONF_PS) { 1675 conf->flags &= ~IEEE80211_CONF_PS; 1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1677 del_timer_sync(&local->dynamic_ps_timer); 1678 cancel_work_sync(&local->dynamic_ps_enable_work); 1679 } 1680 } 1681 1682 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1683 { 1684 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1685 struct sta_info *sta = NULL; 1686 bool authorized = false; 1687 1688 if (!mgd->powersave) 1689 return false; 1690 1691 if (mgd->broken_ap) 1692 return false; 1693 1694 if (!mgd->associated) 1695 return false; 1696 1697 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1698 return false; 1699 1700 if (!mgd->have_beacon) 1701 return false; 1702 1703 rcu_read_lock(); 1704 sta = sta_info_get(sdata, mgd->bssid); 1705 if (sta) 1706 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1707 rcu_read_unlock(); 1708 1709 return authorized; 1710 } 1711 1712 /* need to hold RTNL or interface lock */ 1713 void ieee80211_recalc_ps(struct ieee80211_local *local) 1714 { 1715 struct ieee80211_sub_if_data *sdata, *found = NULL; 1716 int count = 0; 1717 int timeout; 1718 1719 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1720 local->ps_sdata = NULL; 1721 return; 1722 } 1723 1724 list_for_each_entry(sdata, &local->interfaces, list) { 1725 if (!ieee80211_sdata_running(sdata)) 1726 continue; 1727 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1728 /* If an AP vif is found, then disable PS 1729 * by setting the count to zero thereby setting 1730 * ps_sdata to NULL. 1731 */ 1732 count = 0; 1733 break; 1734 } 1735 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1736 continue; 1737 found = sdata; 1738 count++; 1739 } 1740 1741 if (count == 1 && ieee80211_powersave_allowed(found)) { 1742 u8 dtimper = found->u.mgd.dtim_period; 1743 1744 timeout = local->dynamic_ps_forced_timeout; 1745 if (timeout < 0) 1746 timeout = 100; 1747 local->hw.conf.dynamic_ps_timeout = timeout; 1748 1749 /* If the TIM IE is invalid, pretend the value is 1 */ 1750 if (!dtimper) 1751 dtimper = 1; 1752 1753 local->hw.conf.ps_dtim_period = dtimper; 1754 local->ps_sdata = found; 1755 } else { 1756 local->ps_sdata = NULL; 1757 } 1758 1759 ieee80211_change_ps(local); 1760 } 1761 1762 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1763 { 1764 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1765 1766 if (sdata->vif.bss_conf.ps != ps_allowed) { 1767 sdata->vif.bss_conf.ps = ps_allowed; 1768 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1769 } 1770 } 1771 1772 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1773 { 1774 struct ieee80211_local *local = 1775 container_of(work, struct ieee80211_local, 1776 dynamic_ps_disable_work); 1777 1778 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1779 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1780 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1781 } 1782 1783 ieee80211_wake_queues_by_reason(&local->hw, 1784 IEEE80211_MAX_QUEUE_MAP, 1785 IEEE80211_QUEUE_STOP_REASON_PS, 1786 false); 1787 } 1788 1789 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1790 { 1791 struct ieee80211_local *local = 1792 container_of(work, struct ieee80211_local, 1793 dynamic_ps_enable_work); 1794 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1795 struct ieee80211_if_managed *ifmgd; 1796 unsigned long flags; 1797 int q; 1798 1799 /* can only happen when PS was just disabled anyway */ 1800 if (!sdata) 1801 return; 1802 1803 ifmgd = &sdata->u.mgd; 1804 1805 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1806 return; 1807 1808 if (local->hw.conf.dynamic_ps_timeout > 0) { 1809 /* don't enter PS if TX frames are pending */ 1810 if (drv_tx_frames_pending(local)) { 1811 mod_timer(&local->dynamic_ps_timer, jiffies + 1812 msecs_to_jiffies( 1813 local->hw.conf.dynamic_ps_timeout)); 1814 return; 1815 } 1816 1817 /* 1818 * transmission can be stopped by others which leads to 1819 * dynamic_ps_timer expiry. Postpone the ps timer if it 1820 * is not the actual idle state. 1821 */ 1822 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1823 for (q = 0; q < local->hw.queues; q++) { 1824 if (local->queue_stop_reasons[q]) { 1825 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1826 flags); 1827 mod_timer(&local->dynamic_ps_timer, jiffies + 1828 msecs_to_jiffies( 1829 local->hw.conf.dynamic_ps_timeout)); 1830 return; 1831 } 1832 } 1833 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1834 } 1835 1836 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1837 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1838 if (drv_tx_frames_pending(local)) { 1839 mod_timer(&local->dynamic_ps_timer, jiffies + 1840 msecs_to_jiffies( 1841 local->hw.conf.dynamic_ps_timeout)); 1842 } else { 1843 ieee80211_send_nullfunc(local, sdata, true); 1844 /* Flush to get the tx status of nullfunc frame */ 1845 ieee80211_flush_queues(local, sdata, false); 1846 } 1847 } 1848 1849 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1850 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1851 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1852 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1853 local->hw.conf.flags |= IEEE80211_CONF_PS; 1854 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1855 } 1856 } 1857 1858 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1859 { 1860 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1861 1862 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1863 } 1864 1865 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1866 { 1867 struct delayed_work *delayed_work = to_delayed_work(work); 1868 struct ieee80211_sub_if_data *sdata = 1869 container_of(delayed_work, struct ieee80211_sub_if_data, 1870 dfs_cac_timer_work); 1871 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1872 1873 mutex_lock(&sdata->local->mtx); 1874 if (sdata->wdev.cac_started) { 1875 ieee80211_vif_release_channel(sdata); 1876 cfg80211_cac_event(sdata->dev, &chandef, 1877 NL80211_RADAR_CAC_FINISHED, 1878 GFP_KERNEL); 1879 } 1880 mutex_unlock(&sdata->local->mtx); 1881 } 1882 1883 static bool 1884 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1885 { 1886 struct ieee80211_local *local = sdata->local; 1887 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1888 bool ret = false; 1889 int ac; 1890 1891 if (local->hw.queues < IEEE80211_NUM_ACS) 1892 return false; 1893 1894 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1895 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1896 int non_acm_ac; 1897 unsigned long now = jiffies; 1898 1899 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1900 tx_tspec->admitted_time && 1901 time_after(now, tx_tspec->time_slice_start + HZ)) { 1902 tx_tspec->consumed_tx_time = 0; 1903 tx_tspec->time_slice_start = now; 1904 1905 if (tx_tspec->downgraded) 1906 tx_tspec->action = 1907 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1908 } 1909 1910 switch (tx_tspec->action) { 1911 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1912 /* take the original parameters */ 1913 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1914 sdata_err(sdata, 1915 "failed to set TX queue parameters for queue %d\n", 1916 ac); 1917 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1918 tx_tspec->downgraded = false; 1919 ret = true; 1920 break; 1921 case TX_TSPEC_ACTION_DOWNGRADE: 1922 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1923 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1924 ret = true; 1925 break; 1926 } 1927 /* downgrade next lower non-ACM AC */ 1928 for (non_acm_ac = ac + 1; 1929 non_acm_ac < IEEE80211_NUM_ACS; 1930 non_acm_ac++) 1931 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1932 break; 1933 /* Usually the loop will result in using BK even if it 1934 * requires admission control, but such a configuration 1935 * makes no sense and we have to transmit somehow - the 1936 * AC selection does the same thing. 1937 * If we started out trying to downgrade from BK, then 1938 * the extra condition here might be needed. 1939 */ 1940 if (non_acm_ac >= IEEE80211_NUM_ACS) 1941 non_acm_ac = IEEE80211_AC_BK; 1942 if (drv_conf_tx(local, sdata, ac, 1943 &sdata->tx_conf[non_acm_ac])) 1944 sdata_err(sdata, 1945 "failed to set TX queue parameters for queue %d\n", 1946 ac); 1947 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1948 ret = true; 1949 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1950 tx_tspec->time_slice_start + HZ - now + 1); 1951 break; 1952 case TX_TSPEC_ACTION_NONE: 1953 /* nothing now */ 1954 break; 1955 } 1956 } 1957 1958 return ret; 1959 } 1960 1961 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1962 { 1963 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1964 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1965 } 1966 1967 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1968 { 1969 struct ieee80211_sub_if_data *sdata; 1970 1971 sdata = container_of(work, struct ieee80211_sub_if_data, 1972 u.mgd.tx_tspec_wk.work); 1973 ieee80211_sta_handle_tspec_ac_params(sdata); 1974 } 1975 1976 /* MLME */ 1977 static bool 1978 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1979 struct ieee80211_sub_if_data *sdata, 1980 const u8 *wmm_param, size_t wmm_param_len, 1981 const struct ieee80211_mu_edca_param_set *mu_edca) 1982 { 1983 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1985 size_t left; 1986 int count, mu_edca_count, ac; 1987 const u8 *pos; 1988 u8 uapsd_queues = 0; 1989 1990 if (!local->ops->conf_tx) 1991 return false; 1992 1993 if (local->hw.queues < IEEE80211_NUM_ACS) 1994 return false; 1995 1996 if (!wmm_param) 1997 return false; 1998 1999 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2000 return false; 2001 2002 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2003 uapsd_queues = ifmgd->uapsd_queues; 2004 2005 count = wmm_param[6] & 0x0f; 2006 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2007 * if mu_edca was preset before and now it disappeared tell 2008 * the driver about it. 2009 */ 2010 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2011 if (count == ifmgd->wmm_last_param_set && 2012 mu_edca_count == ifmgd->mu_edca_last_param_set) 2013 return false; 2014 ifmgd->wmm_last_param_set = count; 2015 ifmgd->mu_edca_last_param_set = mu_edca_count; 2016 2017 pos = wmm_param + 8; 2018 left = wmm_param_len - 8; 2019 2020 memset(¶ms, 0, sizeof(params)); 2021 2022 sdata->wmm_acm = 0; 2023 for (; left >= 4; left -= 4, pos += 4) { 2024 int aci = (pos[0] >> 5) & 0x03; 2025 int acm = (pos[0] >> 4) & 0x01; 2026 bool uapsd = false; 2027 2028 switch (aci) { 2029 case 1: /* AC_BK */ 2030 ac = IEEE80211_AC_BK; 2031 if (acm) 2032 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2033 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2034 uapsd = true; 2035 params[ac].mu_edca = !!mu_edca; 2036 if (mu_edca) 2037 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2038 break; 2039 case 2: /* AC_VI */ 2040 ac = IEEE80211_AC_VI; 2041 if (acm) 2042 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2043 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2044 uapsd = true; 2045 params[ac].mu_edca = !!mu_edca; 2046 if (mu_edca) 2047 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2048 break; 2049 case 3: /* AC_VO */ 2050 ac = IEEE80211_AC_VO; 2051 if (acm) 2052 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2053 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2054 uapsd = true; 2055 params[ac].mu_edca = !!mu_edca; 2056 if (mu_edca) 2057 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2058 break; 2059 case 0: /* AC_BE */ 2060 default: 2061 ac = IEEE80211_AC_BE; 2062 if (acm) 2063 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2064 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2065 uapsd = true; 2066 params[ac].mu_edca = !!mu_edca; 2067 if (mu_edca) 2068 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2069 break; 2070 } 2071 2072 params[ac].aifs = pos[0] & 0x0f; 2073 2074 if (params[ac].aifs < 2) { 2075 sdata_info(sdata, 2076 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2077 params[ac].aifs, aci); 2078 params[ac].aifs = 2; 2079 } 2080 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2081 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2082 params[ac].txop = get_unaligned_le16(pos + 2); 2083 params[ac].acm = acm; 2084 params[ac].uapsd = uapsd; 2085 2086 if (params[ac].cw_min == 0 || 2087 params[ac].cw_min > params[ac].cw_max) { 2088 sdata_info(sdata, 2089 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2090 params[ac].cw_min, params[ac].cw_max, aci); 2091 return false; 2092 } 2093 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2094 } 2095 2096 /* WMM specification requires all 4 ACIs. */ 2097 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2098 if (params[ac].cw_min == 0) { 2099 sdata_info(sdata, 2100 "AP has invalid WMM params (missing AC %d), using defaults\n", 2101 ac); 2102 return false; 2103 } 2104 } 2105 2106 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2107 mlme_dbg(sdata, 2108 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2109 ac, params[ac].acm, 2110 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2111 params[ac].txop, params[ac].uapsd, 2112 ifmgd->tx_tspec[ac].downgraded); 2113 sdata->tx_conf[ac] = params[ac]; 2114 if (!ifmgd->tx_tspec[ac].downgraded && 2115 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2116 sdata_err(sdata, 2117 "failed to set TX queue parameters for AC %d\n", 2118 ac); 2119 } 2120 2121 /* enable WMM or activate new settings */ 2122 sdata->vif.bss_conf.qos = true; 2123 return true; 2124 } 2125 2126 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2127 { 2128 lockdep_assert_held(&sdata->local->mtx); 2129 2130 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2131 ieee80211_run_deferred_scan(sdata->local); 2132 } 2133 2134 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2135 { 2136 mutex_lock(&sdata->local->mtx); 2137 __ieee80211_stop_poll(sdata); 2138 mutex_unlock(&sdata->local->mtx); 2139 } 2140 2141 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2142 u16 capab, bool erp_valid, u8 erp) 2143 { 2144 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2145 struct ieee80211_supported_band *sband; 2146 u32 changed = 0; 2147 bool use_protection; 2148 bool use_short_preamble; 2149 bool use_short_slot; 2150 2151 sband = ieee80211_get_sband(sdata); 2152 if (!sband) 2153 return changed; 2154 2155 if (erp_valid) { 2156 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2157 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2158 } else { 2159 use_protection = false; 2160 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2161 } 2162 2163 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2164 if (sband->band == NL80211_BAND_5GHZ || 2165 sband->band == NL80211_BAND_6GHZ) 2166 use_short_slot = true; 2167 2168 if (use_protection != bss_conf->use_cts_prot) { 2169 bss_conf->use_cts_prot = use_protection; 2170 changed |= BSS_CHANGED_ERP_CTS_PROT; 2171 } 2172 2173 if (use_short_preamble != bss_conf->use_short_preamble) { 2174 bss_conf->use_short_preamble = use_short_preamble; 2175 changed |= BSS_CHANGED_ERP_PREAMBLE; 2176 } 2177 2178 if (use_short_slot != bss_conf->use_short_slot) { 2179 bss_conf->use_short_slot = use_short_slot; 2180 changed |= BSS_CHANGED_ERP_SLOT; 2181 } 2182 2183 return changed; 2184 } 2185 2186 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2187 struct cfg80211_bss *cbss, 2188 u32 bss_info_changed) 2189 { 2190 struct ieee80211_bss *bss = (void *)cbss->priv; 2191 struct ieee80211_local *local = sdata->local; 2192 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2193 2194 bss_info_changed |= BSS_CHANGED_ASSOC; 2195 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2196 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2197 2198 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2199 beacon_loss_count * bss_conf->beacon_int)); 2200 2201 sdata->u.mgd.associated = cbss; 2202 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2203 2204 ieee80211_check_rate_mask(sdata); 2205 2206 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2207 2208 if (sdata->vif.p2p || 2209 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2210 const struct cfg80211_bss_ies *ies; 2211 2212 rcu_read_lock(); 2213 ies = rcu_dereference(cbss->ies); 2214 if (ies) { 2215 int ret; 2216 2217 ret = cfg80211_get_p2p_attr( 2218 ies->data, ies->len, 2219 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2220 (u8 *) &bss_conf->p2p_noa_attr, 2221 sizeof(bss_conf->p2p_noa_attr)); 2222 if (ret >= 2) { 2223 sdata->u.mgd.p2p_noa_index = 2224 bss_conf->p2p_noa_attr.index; 2225 bss_info_changed |= BSS_CHANGED_P2P_PS; 2226 } 2227 } 2228 rcu_read_unlock(); 2229 } 2230 2231 /* just to be sure */ 2232 ieee80211_stop_poll(sdata); 2233 2234 ieee80211_led_assoc(local, 1); 2235 2236 if (sdata->u.mgd.have_beacon) { 2237 /* 2238 * If the AP is buggy we may get here with no DTIM period 2239 * known, so assume it's 1 which is the only safe assumption 2240 * in that case, although if the TIM IE is broken powersave 2241 * probably just won't work at all. 2242 */ 2243 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2244 bss_conf->beacon_rate = bss->beacon_rate; 2245 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2246 } else { 2247 bss_conf->beacon_rate = NULL; 2248 bss_conf->dtim_period = 0; 2249 } 2250 2251 bss_conf->assoc = 1; 2252 2253 /* Tell the driver to monitor connection quality (if supported) */ 2254 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2255 bss_conf->cqm_rssi_thold) 2256 bss_info_changed |= BSS_CHANGED_CQM; 2257 2258 /* Enable ARP filtering */ 2259 if (bss_conf->arp_addr_cnt) 2260 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2261 2262 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2263 2264 mutex_lock(&local->iflist_mtx); 2265 ieee80211_recalc_ps(local); 2266 mutex_unlock(&local->iflist_mtx); 2267 2268 ieee80211_recalc_smps(sdata); 2269 ieee80211_recalc_ps_vif(sdata); 2270 2271 netif_carrier_on(sdata->dev); 2272 } 2273 2274 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2275 u16 stype, u16 reason, bool tx, 2276 u8 *frame_buf) 2277 { 2278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2279 struct ieee80211_local *local = sdata->local; 2280 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2281 u32 changed = 0; 2282 struct ieee80211_prep_tx_info info = { 2283 .subtype = stype, 2284 }; 2285 2286 sdata_assert_lock(sdata); 2287 2288 if (WARN_ON_ONCE(tx && !frame_buf)) 2289 return; 2290 2291 if (WARN_ON(!ifmgd->associated)) 2292 return; 2293 2294 ieee80211_stop_poll(sdata); 2295 2296 ifmgd->associated = NULL; 2297 netif_carrier_off(sdata->dev); 2298 2299 /* 2300 * if we want to get out of ps before disassoc (why?) we have 2301 * to do it before sending disassoc, as otherwise the null-packet 2302 * won't be valid. 2303 */ 2304 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2305 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2306 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2307 } 2308 local->ps_sdata = NULL; 2309 2310 /* disable per-vif ps */ 2311 ieee80211_recalc_ps_vif(sdata); 2312 2313 /* make sure ongoing transmission finishes */ 2314 synchronize_net(); 2315 2316 /* 2317 * drop any frame before deauth/disassoc, this can be data or 2318 * management frame. Since we are disconnecting, we should not 2319 * insist sending these frames which can take time and delay 2320 * the disconnection and possible the roaming. 2321 */ 2322 if (tx) 2323 ieee80211_flush_queues(local, sdata, true); 2324 2325 /* deauthenticate/disassociate now */ 2326 if (tx || frame_buf) { 2327 /* 2328 * In multi channel scenarios guarantee that the virtual 2329 * interface is granted immediate airtime to transmit the 2330 * deauthentication frame by calling mgd_prepare_tx, if the 2331 * driver requested so. 2332 */ 2333 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2334 !ifmgd->have_beacon) { 2335 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2336 } 2337 2338 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2339 ifmgd->bssid, stype, reason, 2340 tx, frame_buf); 2341 } 2342 2343 /* flush out frame - make sure the deauth was actually sent */ 2344 if (tx) 2345 ieee80211_flush_queues(local, sdata, false); 2346 2347 drv_mgd_complete_tx(sdata->local, sdata, &info); 2348 2349 /* clear bssid only after building the needed mgmt frames */ 2350 eth_zero_addr(ifmgd->bssid); 2351 2352 sdata->vif.bss_conf.ssid_len = 0; 2353 2354 /* remove AP and TDLS peers */ 2355 sta_info_flush(sdata); 2356 2357 /* finally reset all BSS / config parameters */ 2358 changed |= ieee80211_reset_erp_info(sdata); 2359 2360 ieee80211_led_assoc(local, 0); 2361 changed |= BSS_CHANGED_ASSOC; 2362 sdata->vif.bss_conf.assoc = false; 2363 2364 ifmgd->p2p_noa_index = -1; 2365 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2366 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2367 2368 /* on the next assoc, re-program HT/VHT parameters */ 2369 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2370 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2371 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2372 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2373 2374 /* reset MU-MIMO ownership and group data */ 2375 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2376 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2377 memset(sdata->vif.bss_conf.mu_group.position, 0, 2378 sizeof(sdata->vif.bss_conf.mu_group.position)); 2379 changed |= BSS_CHANGED_MU_GROUPS; 2380 sdata->vif.mu_mimo_owner = false; 2381 2382 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2383 2384 del_timer_sync(&local->dynamic_ps_timer); 2385 cancel_work_sync(&local->dynamic_ps_enable_work); 2386 2387 /* Disable ARP filtering */ 2388 if (sdata->vif.bss_conf.arp_addr_cnt) 2389 changed |= BSS_CHANGED_ARP_FILTER; 2390 2391 sdata->vif.bss_conf.qos = false; 2392 changed |= BSS_CHANGED_QOS; 2393 2394 /* The BSSID (not really interesting) and HT changed */ 2395 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2396 ieee80211_bss_info_change_notify(sdata, changed); 2397 2398 /* disassociated - set to defaults now */ 2399 ieee80211_set_wmm_default(sdata, false, false); 2400 2401 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2402 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2403 del_timer_sync(&sdata->u.mgd.timer); 2404 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2405 2406 sdata->vif.bss_conf.dtim_period = 0; 2407 sdata->vif.bss_conf.beacon_rate = NULL; 2408 2409 ifmgd->have_beacon = false; 2410 2411 ifmgd->flags = 0; 2412 mutex_lock(&local->mtx); 2413 ieee80211_vif_release_channel(sdata); 2414 2415 sdata->vif.csa_active = false; 2416 ifmgd->csa_waiting_bcn = false; 2417 ifmgd->csa_ignored_same_chan = false; 2418 if (sdata->csa_block_tx) { 2419 ieee80211_wake_vif_queues(local, sdata, 2420 IEEE80211_QUEUE_STOP_REASON_CSA); 2421 sdata->csa_block_tx = false; 2422 } 2423 mutex_unlock(&local->mtx); 2424 2425 /* existing TX TSPEC sessions no longer exist */ 2426 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2427 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2428 2429 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2430 2431 bss_conf->pwr_reduction = 0; 2432 bss_conf->tx_pwr_env_num = 0; 2433 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2434 } 2435 2436 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2437 { 2438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2439 struct ieee80211_local *local = sdata->local; 2440 2441 mutex_lock(&local->mtx); 2442 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2443 goto out; 2444 2445 __ieee80211_stop_poll(sdata); 2446 2447 mutex_lock(&local->iflist_mtx); 2448 ieee80211_recalc_ps(local); 2449 mutex_unlock(&local->iflist_mtx); 2450 2451 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2452 goto out; 2453 2454 /* 2455 * We've received a probe response, but are not sure whether 2456 * we have or will be receiving any beacons or data, so let's 2457 * schedule the timers again, just in case. 2458 */ 2459 ieee80211_sta_reset_beacon_monitor(sdata); 2460 2461 mod_timer(&ifmgd->conn_mon_timer, 2462 round_jiffies_up(jiffies + 2463 IEEE80211_CONNECTION_IDLE_TIME)); 2464 out: 2465 mutex_unlock(&local->mtx); 2466 } 2467 2468 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2469 struct ieee80211_hdr *hdr, 2470 u16 tx_time) 2471 { 2472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2473 u16 tid; 2474 int ac; 2475 struct ieee80211_sta_tx_tspec *tx_tspec; 2476 unsigned long now = jiffies; 2477 2478 if (!ieee80211_is_data_qos(hdr->frame_control)) 2479 return; 2480 2481 tid = ieee80211_get_tid(hdr); 2482 ac = ieee80211_ac_from_tid(tid); 2483 tx_tspec = &ifmgd->tx_tspec[ac]; 2484 2485 if (likely(!tx_tspec->admitted_time)) 2486 return; 2487 2488 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2489 tx_tspec->consumed_tx_time = 0; 2490 tx_tspec->time_slice_start = now; 2491 2492 if (tx_tspec->downgraded) { 2493 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2494 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2495 } 2496 } 2497 2498 if (tx_tspec->downgraded) 2499 return; 2500 2501 tx_tspec->consumed_tx_time += tx_time; 2502 2503 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2504 tx_tspec->downgraded = true; 2505 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2506 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2507 } 2508 } 2509 2510 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2511 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2512 { 2513 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2514 2515 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2516 !sdata->u.mgd.probe_send_count) 2517 return; 2518 2519 if (ack) 2520 sdata->u.mgd.probe_send_count = 0; 2521 else 2522 sdata->u.mgd.nullfunc_failed = true; 2523 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2524 } 2525 2526 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2527 const u8 *src, const u8 *dst, 2528 const u8 *ssid, size_t ssid_len, 2529 struct ieee80211_channel *channel) 2530 { 2531 struct sk_buff *skb; 2532 2533 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2534 ssid, ssid_len, NULL, 0, 2535 IEEE80211_PROBE_FLAG_DIRECTED); 2536 if (skb) 2537 ieee80211_tx_skb(sdata, skb); 2538 } 2539 2540 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2541 { 2542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2543 const struct element *ssid; 2544 u8 *dst = ifmgd->associated->bssid; 2545 u8 unicast_limit = max(1, max_probe_tries - 3); 2546 struct sta_info *sta; 2547 2548 /* 2549 * Try sending broadcast probe requests for the last three 2550 * probe requests after the first ones failed since some 2551 * buggy APs only support broadcast probe requests. 2552 */ 2553 if (ifmgd->probe_send_count >= unicast_limit) 2554 dst = NULL; 2555 2556 /* 2557 * When the hardware reports an accurate Tx ACK status, it's 2558 * better to send a nullfunc frame instead of a probe request, 2559 * as it will kick us off the AP quickly if we aren't associated 2560 * anymore. The timeout will be reset if the frame is ACKed by 2561 * the AP. 2562 */ 2563 ifmgd->probe_send_count++; 2564 2565 if (dst) { 2566 mutex_lock(&sdata->local->sta_mtx); 2567 sta = sta_info_get(sdata, dst); 2568 if (!WARN_ON(!sta)) 2569 ieee80211_check_fast_rx(sta); 2570 mutex_unlock(&sdata->local->sta_mtx); 2571 } 2572 2573 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2574 ifmgd->nullfunc_failed = false; 2575 ieee80211_send_nullfunc(sdata->local, sdata, false); 2576 } else { 2577 int ssid_len; 2578 2579 rcu_read_lock(); 2580 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); 2581 if (WARN_ON_ONCE(ssid == NULL)) 2582 ssid_len = 0; 2583 else 2584 ssid_len = ssid->datalen; 2585 2586 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2587 ssid->data, ssid_len, 2588 ifmgd->associated->channel); 2589 rcu_read_unlock(); 2590 } 2591 2592 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2593 run_again(sdata, ifmgd->probe_timeout); 2594 } 2595 2596 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2597 bool beacon) 2598 { 2599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2600 bool already = false; 2601 2602 if (!ieee80211_sdata_running(sdata)) 2603 return; 2604 2605 sdata_lock(sdata); 2606 2607 if (!ifmgd->associated) 2608 goto out; 2609 2610 mutex_lock(&sdata->local->mtx); 2611 2612 if (sdata->local->tmp_channel || sdata->local->scanning) { 2613 mutex_unlock(&sdata->local->mtx); 2614 goto out; 2615 } 2616 2617 if (sdata->local->suspending) { 2618 /* reschedule after resume */ 2619 mutex_unlock(&sdata->local->mtx); 2620 ieee80211_reset_ap_probe(sdata); 2621 goto out; 2622 } 2623 2624 if (beacon) { 2625 mlme_dbg_ratelimited(sdata, 2626 "detected beacon loss from AP (missed %d beacons) - probing\n", 2627 beacon_loss_count); 2628 2629 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2630 } 2631 2632 /* 2633 * The driver/our work has already reported this event or the 2634 * connection monitoring has kicked in and we have already sent 2635 * a probe request. Or maybe the AP died and the driver keeps 2636 * reporting until we disassociate... 2637 * 2638 * In either case we have to ignore the current call to this 2639 * function (except for setting the correct probe reason bit) 2640 * because otherwise we would reset the timer every time and 2641 * never check whether we received a probe response! 2642 */ 2643 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2644 already = true; 2645 2646 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2647 2648 mutex_unlock(&sdata->local->mtx); 2649 2650 if (already) 2651 goto out; 2652 2653 mutex_lock(&sdata->local->iflist_mtx); 2654 ieee80211_recalc_ps(sdata->local); 2655 mutex_unlock(&sdata->local->iflist_mtx); 2656 2657 ifmgd->probe_send_count = 0; 2658 ieee80211_mgd_probe_ap_send(sdata); 2659 out: 2660 sdata_unlock(sdata); 2661 } 2662 2663 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2664 struct ieee80211_vif *vif) 2665 { 2666 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2668 struct cfg80211_bss *cbss; 2669 struct sk_buff *skb; 2670 const struct element *ssid; 2671 int ssid_len; 2672 2673 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2674 return NULL; 2675 2676 sdata_assert_lock(sdata); 2677 2678 if (ifmgd->associated) 2679 cbss = ifmgd->associated; 2680 else if (ifmgd->auth_data) 2681 cbss = ifmgd->auth_data->bss; 2682 else if (ifmgd->assoc_data) 2683 cbss = ifmgd->assoc_data->bss; 2684 else 2685 return NULL; 2686 2687 rcu_read_lock(); 2688 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2689 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2690 "invalid SSID element (len=%d)", 2691 ssid ? ssid->datalen : -1)) 2692 ssid_len = 0; 2693 else 2694 ssid_len = ssid->datalen; 2695 2696 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2697 (u32) -1, cbss->channel, 2698 ssid->data, ssid_len, 2699 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2700 rcu_read_unlock(); 2701 2702 return skb; 2703 } 2704 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2705 2706 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2707 const u8 *buf, size_t len, bool tx, 2708 u16 reason, bool reconnect) 2709 { 2710 struct ieee80211_event event = { 2711 .type = MLME_EVENT, 2712 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2713 .u.mlme.reason = reason, 2714 }; 2715 2716 if (tx) 2717 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2718 else 2719 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2720 2721 drv_event_callback(sdata->local, sdata, &event); 2722 } 2723 2724 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2725 { 2726 struct ieee80211_local *local = sdata->local; 2727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2728 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2729 bool tx; 2730 2731 sdata_lock(sdata); 2732 if (!ifmgd->associated) { 2733 sdata_unlock(sdata); 2734 return; 2735 } 2736 2737 tx = !sdata->csa_block_tx; 2738 2739 if (!ifmgd->driver_disconnect) { 2740 /* 2741 * AP is probably out of range (or not reachable for another 2742 * reason) so remove the bss struct for that AP. 2743 */ 2744 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2745 } 2746 2747 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2748 ifmgd->driver_disconnect ? 2749 WLAN_REASON_DEAUTH_LEAVING : 2750 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2751 tx, frame_buf); 2752 mutex_lock(&local->mtx); 2753 sdata->vif.csa_active = false; 2754 ifmgd->csa_waiting_bcn = false; 2755 if (sdata->csa_block_tx) { 2756 ieee80211_wake_vif_queues(local, sdata, 2757 IEEE80211_QUEUE_STOP_REASON_CSA); 2758 sdata->csa_block_tx = false; 2759 } 2760 mutex_unlock(&local->mtx); 2761 2762 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2763 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2764 ifmgd->reconnect); 2765 ifmgd->reconnect = false; 2766 2767 sdata_unlock(sdata); 2768 } 2769 2770 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2771 { 2772 struct ieee80211_sub_if_data *sdata = 2773 container_of(work, struct ieee80211_sub_if_data, 2774 u.mgd.beacon_connection_loss_work); 2775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2776 2777 if (ifmgd->associated) 2778 ifmgd->beacon_loss_count++; 2779 2780 if (ifmgd->connection_loss) { 2781 sdata_info(sdata, "Connection to AP %pM lost\n", 2782 ifmgd->bssid); 2783 __ieee80211_disconnect(sdata); 2784 ifmgd->connection_loss = false; 2785 } else if (ifmgd->driver_disconnect) { 2786 sdata_info(sdata, 2787 "Driver requested disconnection from AP %pM\n", 2788 ifmgd->bssid); 2789 __ieee80211_disconnect(sdata); 2790 ifmgd->driver_disconnect = false; 2791 } else { 2792 ieee80211_mgd_probe_ap(sdata, true); 2793 } 2794 } 2795 2796 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2797 { 2798 struct ieee80211_sub_if_data *sdata = 2799 container_of(work, struct ieee80211_sub_if_data, 2800 u.mgd.csa_connection_drop_work); 2801 2802 __ieee80211_disconnect(sdata); 2803 } 2804 2805 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2806 { 2807 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2808 struct ieee80211_hw *hw = &sdata->local->hw; 2809 2810 trace_api_beacon_loss(sdata); 2811 2812 sdata->u.mgd.connection_loss = false; 2813 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2814 } 2815 EXPORT_SYMBOL(ieee80211_beacon_loss); 2816 2817 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2818 { 2819 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2820 struct ieee80211_hw *hw = &sdata->local->hw; 2821 2822 trace_api_connection_loss(sdata); 2823 2824 sdata->u.mgd.connection_loss = true; 2825 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2826 } 2827 EXPORT_SYMBOL(ieee80211_connection_loss); 2828 2829 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2830 { 2831 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2832 struct ieee80211_hw *hw = &sdata->local->hw; 2833 2834 trace_api_disconnect(sdata, reconnect); 2835 2836 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2837 return; 2838 2839 sdata->u.mgd.driver_disconnect = true; 2840 sdata->u.mgd.reconnect = reconnect; 2841 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2842 } 2843 EXPORT_SYMBOL(ieee80211_disconnect); 2844 2845 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2846 bool assoc) 2847 { 2848 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2849 2850 sdata_assert_lock(sdata); 2851 2852 if (!assoc) { 2853 /* 2854 * we are not authenticated yet, the only timer that could be 2855 * running is the timeout for the authentication response which 2856 * which is not relevant anymore. 2857 */ 2858 del_timer_sync(&sdata->u.mgd.timer); 2859 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2860 2861 eth_zero_addr(sdata->u.mgd.bssid); 2862 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2863 sdata->u.mgd.flags = 0; 2864 mutex_lock(&sdata->local->mtx); 2865 ieee80211_vif_release_channel(sdata); 2866 mutex_unlock(&sdata->local->mtx); 2867 } 2868 2869 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2870 kfree(auth_data); 2871 sdata->u.mgd.auth_data = NULL; 2872 } 2873 2874 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2875 bool assoc, bool abandon) 2876 { 2877 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2878 2879 sdata_assert_lock(sdata); 2880 2881 if (!assoc) { 2882 /* 2883 * we are not associated yet, the only timer that could be 2884 * running is the timeout for the association response which 2885 * which is not relevant anymore. 2886 */ 2887 del_timer_sync(&sdata->u.mgd.timer); 2888 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2889 2890 eth_zero_addr(sdata->u.mgd.bssid); 2891 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2892 sdata->u.mgd.flags = 0; 2893 sdata->vif.mu_mimo_owner = false; 2894 2895 mutex_lock(&sdata->local->mtx); 2896 ieee80211_vif_release_channel(sdata); 2897 mutex_unlock(&sdata->local->mtx); 2898 2899 if (abandon) 2900 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2901 } 2902 2903 kfree(assoc_data); 2904 sdata->u.mgd.assoc_data = NULL; 2905 } 2906 2907 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2908 struct ieee80211_mgmt *mgmt, size_t len) 2909 { 2910 struct ieee80211_local *local = sdata->local; 2911 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2912 const struct element *challenge; 2913 u8 *pos; 2914 u32 tx_flags = 0; 2915 struct ieee80211_prep_tx_info info = { 2916 .subtype = IEEE80211_STYPE_AUTH, 2917 }; 2918 2919 pos = mgmt->u.auth.variable; 2920 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2921 len - (pos - (u8 *)mgmt)); 2922 if (!challenge) 2923 return; 2924 auth_data->expected_transaction = 4; 2925 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2926 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2927 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2928 IEEE80211_TX_INTFL_MLME_CONN_TX; 2929 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2930 (void *)challenge, 2931 challenge->datalen + sizeof(*challenge), 2932 auth_data->bss->bssid, auth_data->bss->bssid, 2933 auth_data->key, auth_data->key_len, 2934 auth_data->key_idx, tx_flags); 2935 } 2936 2937 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2938 const u8 *bssid) 2939 { 2940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2941 struct sta_info *sta; 2942 bool result = true; 2943 2944 sdata_info(sdata, "authenticated\n"); 2945 ifmgd->auth_data->done = true; 2946 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2947 ifmgd->auth_data->timeout_started = true; 2948 run_again(sdata, ifmgd->auth_data->timeout); 2949 2950 /* move station state to auth */ 2951 mutex_lock(&sdata->local->sta_mtx); 2952 sta = sta_info_get(sdata, bssid); 2953 if (!sta) { 2954 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2955 result = false; 2956 goto out; 2957 } 2958 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2959 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2960 result = false; 2961 goto out; 2962 } 2963 2964 out: 2965 mutex_unlock(&sdata->local->sta_mtx); 2966 return result; 2967 } 2968 2969 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2970 struct ieee80211_mgmt *mgmt, size_t len) 2971 { 2972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2973 u8 bssid[ETH_ALEN]; 2974 u16 auth_alg, auth_transaction, status_code; 2975 struct ieee80211_event event = { 2976 .type = MLME_EVENT, 2977 .u.mlme.data = AUTH_EVENT, 2978 }; 2979 struct ieee80211_prep_tx_info info = { 2980 .subtype = IEEE80211_STYPE_AUTH, 2981 }; 2982 2983 sdata_assert_lock(sdata); 2984 2985 if (len < 24 + 6) 2986 return; 2987 2988 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2989 return; 2990 2991 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2992 2993 if (!ether_addr_equal(bssid, mgmt->bssid)) 2994 return; 2995 2996 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2997 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2998 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2999 3000 if (auth_alg != ifmgd->auth_data->algorithm || 3001 (auth_alg != WLAN_AUTH_SAE && 3002 auth_transaction != ifmgd->auth_data->expected_transaction) || 3003 (auth_alg == WLAN_AUTH_SAE && 3004 (auth_transaction < ifmgd->auth_data->expected_transaction || 3005 auth_transaction > 2))) { 3006 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3007 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3008 auth_transaction, 3009 ifmgd->auth_data->expected_transaction); 3010 goto notify_driver; 3011 } 3012 3013 if (status_code != WLAN_STATUS_SUCCESS) { 3014 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3015 3016 if (auth_alg == WLAN_AUTH_SAE && 3017 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3018 (auth_transaction == 1 && 3019 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3020 status_code == WLAN_STATUS_SAE_PK)))) { 3021 /* waiting for userspace now */ 3022 ifmgd->auth_data->waiting = true; 3023 ifmgd->auth_data->timeout = 3024 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3025 ifmgd->auth_data->timeout_started = true; 3026 run_again(sdata, ifmgd->auth_data->timeout); 3027 goto notify_driver; 3028 } 3029 3030 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3031 mgmt->sa, status_code); 3032 ieee80211_destroy_auth_data(sdata, false); 3033 event.u.mlme.status = MLME_DENIED; 3034 event.u.mlme.reason = status_code; 3035 drv_event_callback(sdata->local, sdata, &event); 3036 goto notify_driver; 3037 } 3038 3039 switch (ifmgd->auth_data->algorithm) { 3040 case WLAN_AUTH_OPEN: 3041 case WLAN_AUTH_LEAP: 3042 case WLAN_AUTH_FT: 3043 case WLAN_AUTH_SAE: 3044 case WLAN_AUTH_FILS_SK: 3045 case WLAN_AUTH_FILS_SK_PFS: 3046 case WLAN_AUTH_FILS_PK: 3047 break; 3048 case WLAN_AUTH_SHARED_KEY: 3049 if (ifmgd->auth_data->expected_transaction != 4) { 3050 ieee80211_auth_challenge(sdata, mgmt, len); 3051 /* need another frame */ 3052 return; 3053 } 3054 break; 3055 default: 3056 WARN_ONCE(1, "invalid auth alg %d", 3057 ifmgd->auth_data->algorithm); 3058 goto notify_driver; 3059 } 3060 3061 event.u.mlme.status = MLME_SUCCESS; 3062 info.success = 1; 3063 drv_event_callback(sdata->local, sdata, &event); 3064 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3065 (auth_transaction == 2 && 3066 ifmgd->auth_data->expected_transaction == 2)) { 3067 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3068 return; /* ignore frame -- wait for timeout */ 3069 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3070 auth_transaction == 2) { 3071 sdata_info(sdata, "SAE peer confirmed\n"); 3072 ifmgd->auth_data->peer_confirmed = true; 3073 } 3074 3075 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3076 notify_driver: 3077 drv_mgd_complete_tx(sdata->local, sdata, &info); 3078 } 3079 3080 #define case_WLAN(type) \ 3081 case WLAN_REASON_##type: return #type 3082 3083 const char *ieee80211_get_reason_code_string(u16 reason_code) 3084 { 3085 switch (reason_code) { 3086 case_WLAN(UNSPECIFIED); 3087 case_WLAN(PREV_AUTH_NOT_VALID); 3088 case_WLAN(DEAUTH_LEAVING); 3089 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3090 case_WLAN(DISASSOC_AP_BUSY); 3091 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3092 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3093 case_WLAN(DISASSOC_STA_HAS_LEFT); 3094 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3095 case_WLAN(DISASSOC_BAD_POWER); 3096 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3097 case_WLAN(INVALID_IE); 3098 case_WLAN(MIC_FAILURE); 3099 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3100 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3101 case_WLAN(IE_DIFFERENT); 3102 case_WLAN(INVALID_GROUP_CIPHER); 3103 case_WLAN(INVALID_PAIRWISE_CIPHER); 3104 case_WLAN(INVALID_AKMP); 3105 case_WLAN(UNSUPP_RSN_VERSION); 3106 case_WLAN(INVALID_RSN_IE_CAP); 3107 case_WLAN(IEEE8021X_FAILED); 3108 case_WLAN(CIPHER_SUITE_REJECTED); 3109 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3110 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3111 case_WLAN(DISASSOC_LOW_ACK); 3112 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3113 case_WLAN(QSTA_LEAVE_QBSS); 3114 case_WLAN(QSTA_NOT_USE); 3115 case_WLAN(QSTA_REQUIRE_SETUP); 3116 case_WLAN(QSTA_TIMEOUT); 3117 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3118 case_WLAN(MESH_PEER_CANCELED); 3119 case_WLAN(MESH_MAX_PEERS); 3120 case_WLAN(MESH_CONFIG); 3121 case_WLAN(MESH_CLOSE); 3122 case_WLAN(MESH_MAX_RETRIES); 3123 case_WLAN(MESH_CONFIRM_TIMEOUT); 3124 case_WLAN(MESH_INVALID_GTK); 3125 case_WLAN(MESH_INCONSISTENT_PARAM); 3126 case_WLAN(MESH_INVALID_SECURITY); 3127 case_WLAN(MESH_PATH_ERROR); 3128 case_WLAN(MESH_PATH_NOFORWARD); 3129 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3130 case_WLAN(MAC_EXISTS_IN_MBSS); 3131 case_WLAN(MESH_CHAN_REGULATORY); 3132 case_WLAN(MESH_CHAN); 3133 default: return "<unknown>"; 3134 } 3135 } 3136 3137 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3138 struct ieee80211_mgmt *mgmt, size_t len) 3139 { 3140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3141 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3142 3143 sdata_assert_lock(sdata); 3144 3145 if (len < 24 + 2) 3146 return; 3147 3148 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3149 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3150 return; 3151 } 3152 3153 if (ifmgd->associated && 3154 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3155 const u8 *bssid = ifmgd->associated->bssid; 3156 3157 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3158 bssid, reason_code, 3159 ieee80211_get_reason_code_string(reason_code)); 3160 3161 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3162 3163 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3164 reason_code, false); 3165 return; 3166 } 3167 3168 if (ifmgd->assoc_data && 3169 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3170 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3171 3172 sdata_info(sdata, 3173 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3174 bssid, reason_code, 3175 ieee80211_get_reason_code_string(reason_code)); 3176 3177 ieee80211_destroy_assoc_data(sdata, false, true); 3178 3179 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3180 return; 3181 } 3182 } 3183 3184 3185 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3186 struct ieee80211_mgmt *mgmt, size_t len) 3187 { 3188 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3189 u16 reason_code; 3190 3191 sdata_assert_lock(sdata); 3192 3193 if (len < 24 + 2) 3194 return; 3195 3196 if (!ifmgd->associated || 3197 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3198 return; 3199 3200 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3201 3202 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3203 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3204 return; 3205 } 3206 3207 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3208 mgmt->sa, reason_code, 3209 ieee80211_get_reason_code_string(reason_code)); 3210 3211 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3212 3213 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3214 false); 3215 } 3216 3217 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3218 u8 *supp_rates, unsigned int supp_rates_len, 3219 u32 *rates, u32 *basic_rates, 3220 bool *have_higher_than_11mbit, 3221 int *min_rate, int *min_rate_index, 3222 int shift) 3223 { 3224 int i, j; 3225 3226 for (i = 0; i < supp_rates_len; i++) { 3227 int rate = supp_rates[i] & 0x7f; 3228 bool is_basic = !!(supp_rates[i] & 0x80); 3229 3230 if ((rate * 5 * (1 << shift)) > 110) 3231 *have_higher_than_11mbit = true; 3232 3233 /* 3234 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3235 * since they're not rates. 3236 * 3237 * Note: Even though the membership selector and the basic 3238 * rate flag share the same bit, they are not exactly 3239 * the same. 3240 */ 3241 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3242 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3243 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3244 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3245 continue; 3246 3247 for (j = 0; j < sband->n_bitrates; j++) { 3248 struct ieee80211_rate *br; 3249 int brate; 3250 3251 br = &sband->bitrates[j]; 3252 3253 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3254 if (brate == rate) { 3255 *rates |= BIT(j); 3256 if (is_basic) 3257 *basic_rates |= BIT(j); 3258 if ((rate * 5) < *min_rate) { 3259 *min_rate = rate * 5; 3260 *min_rate_index = j; 3261 } 3262 break; 3263 } 3264 } 3265 } 3266 } 3267 3268 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3269 const struct ieee802_11_elems *elems) 3270 { 3271 if (elems->ext_capab_len < 10) 3272 return false; 3273 3274 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3275 return false; 3276 3277 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3278 IEEE80211_HE_MAC_CAP0_TWT_RES; 3279 } 3280 3281 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3282 struct sta_info *sta, 3283 struct ieee802_11_elems *elems) 3284 { 3285 bool twt = ieee80211_twt_req_supported(sta, elems); 3286 3287 if (sdata->vif.bss_conf.twt_requester != twt) { 3288 sdata->vif.bss_conf.twt_requester = twt; 3289 return BSS_CHANGED_TWT; 3290 } 3291 return 0; 3292 } 3293 3294 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3295 struct ieee80211_bss_conf *bss_conf, 3296 struct ieee80211_supported_band *sband, 3297 struct sta_info *sta) 3298 { 3299 const struct ieee80211_sta_he_cap *own_he_cap = 3300 ieee80211_get_he_iftype_cap(sband, 3301 ieee80211_vif_type_p2p(&sdata->vif)); 3302 3303 return bss_conf->he_support && 3304 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3305 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3306 own_he_cap && 3307 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3308 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3309 } 3310 3311 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3312 struct cfg80211_bss *cbss, 3313 struct ieee80211_mgmt *mgmt, size_t len, 3314 struct ieee802_11_elems *elems) 3315 { 3316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3317 struct ieee80211_local *local = sdata->local; 3318 struct ieee80211_supported_band *sband; 3319 struct sta_info *sta; 3320 u16 capab_info, aid; 3321 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3322 const struct cfg80211_bss_ies *bss_ies = NULL; 3323 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3324 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3325 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3326 u32 changed = 0; 3327 u8 *pos; 3328 int err; 3329 bool ret; 3330 3331 /* AssocResp and ReassocResp have identical structure */ 3332 3333 pos = mgmt->u.assoc_resp.variable; 3334 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3335 if (is_s1g) { 3336 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3337 aid = 0; /* TODO */ 3338 } 3339 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3340 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3341 mgmt->bssid, assoc_data->bss->bssid); 3342 3343 if (!elems) 3344 return false; 3345 3346 if (elems->aid_resp) 3347 aid = le16_to_cpu(elems->aid_resp->aid); 3348 3349 /* 3350 * The 5 MSB of the AID field are reserved 3351 * (802.11-2016 9.4.1.8 AID field) 3352 */ 3353 aid &= 0x7ff; 3354 3355 ifmgd->broken_ap = false; 3356 3357 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3358 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3359 aid); 3360 aid = 0; 3361 ifmgd->broken_ap = true; 3362 } 3363 3364 if (!is_s1g && !elems->supp_rates) { 3365 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3366 ret = false; 3367 goto out; 3368 } 3369 3370 sdata->vif.bss_conf.aid = aid; 3371 ifmgd->tdls_chan_switch_prohibited = 3372 elems->ext_capab && elems->ext_capab_len >= 5 && 3373 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3374 3375 /* 3376 * Some APs are erroneously not including some information in their 3377 * (re)association response frames. Try to recover by using the data 3378 * from the beacon or probe response. This seems to afflict mobile 3379 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3380 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3381 */ 3382 if (!is_6ghz && 3383 ((assoc_data->wmm && !elems->wmm_param) || 3384 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3385 (!elems->ht_cap_elem || !elems->ht_operation)) || 3386 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3387 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3388 const struct cfg80211_bss_ies *ies; 3389 struct ieee802_11_elems *bss_elems; 3390 3391 rcu_read_lock(); 3392 ies = rcu_dereference(cbss->ies); 3393 if (ies) 3394 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3395 GFP_ATOMIC); 3396 rcu_read_unlock(); 3397 if (!bss_ies) { 3398 ret = false; 3399 goto out; 3400 } 3401 3402 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3403 false, mgmt->bssid, 3404 assoc_data->bss->bssid); 3405 if (!bss_elems) { 3406 ret = false; 3407 goto out; 3408 } 3409 3410 if (assoc_data->wmm && 3411 !elems->wmm_param && bss_elems->wmm_param) { 3412 elems->wmm_param = bss_elems->wmm_param; 3413 sdata_info(sdata, 3414 "AP bug: WMM param missing from AssocResp\n"); 3415 } 3416 3417 /* 3418 * Also check if we requested HT/VHT, otherwise the AP doesn't 3419 * have to include the IEs in the (re)association response. 3420 */ 3421 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3422 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3423 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3424 sdata_info(sdata, 3425 "AP bug: HT capability missing from AssocResp\n"); 3426 } 3427 if (!elems->ht_operation && bss_elems->ht_operation && 3428 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3429 elems->ht_operation = bss_elems->ht_operation; 3430 sdata_info(sdata, 3431 "AP bug: HT operation missing from AssocResp\n"); 3432 } 3433 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3434 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3435 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3436 sdata_info(sdata, 3437 "AP bug: VHT capa missing from AssocResp\n"); 3438 } 3439 if (!elems->vht_operation && bss_elems->vht_operation && 3440 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3441 elems->vht_operation = bss_elems->vht_operation; 3442 sdata_info(sdata, 3443 "AP bug: VHT operation missing from AssocResp\n"); 3444 } 3445 3446 kfree(bss_elems); 3447 } 3448 3449 /* 3450 * We previously checked these in the beacon/probe response, so 3451 * they should be present here. This is just a safety net. 3452 */ 3453 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3454 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3455 sdata_info(sdata, 3456 "HT AP is missing WMM params or HT capability/operation\n"); 3457 ret = false; 3458 goto out; 3459 } 3460 3461 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3462 (!elems->vht_cap_elem || !elems->vht_operation)) { 3463 sdata_info(sdata, 3464 "VHT AP is missing VHT capability/operation\n"); 3465 ret = false; 3466 goto out; 3467 } 3468 3469 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3470 !elems->he_6ghz_capa) { 3471 sdata_info(sdata, 3472 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3473 ret = false; 3474 goto out; 3475 } 3476 3477 mutex_lock(&sdata->local->sta_mtx); 3478 /* 3479 * station info was already allocated and inserted before 3480 * the association and should be available to us 3481 */ 3482 sta = sta_info_get(sdata, cbss->bssid); 3483 if (WARN_ON(!sta)) { 3484 mutex_unlock(&sdata->local->sta_mtx); 3485 ret = false; 3486 goto out; 3487 } 3488 3489 sband = ieee80211_get_sband(sdata); 3490 if (!sband) { 3491 mutex_unlock(&sdata->local->sta_mtx); 3492 ret = false; 3493 goto out; 3494 } 3495 3496 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3497 (!elems->he_cap || !elems->he_operation)) { 3498 mutex_unlock(&sdata->local->sta_mtx); 3499 sdata_info(sdata, 3500 "HE AP is missing HE capability/operation\n"); 3501 ret = false; 3502 goto out; 3503 } 3504 3505 /* Set up internal HT/VHT capabilities */ 3506 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3507 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3508 elems->ht_cap_elem, sta); 3509 3510 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3511 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3512 elems->vht_cap_elem, sta); 3513 3514 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3515 elems->he_cap) { 3516 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3517 elems->he_cap, 3518 elems->he_cap_len, 3519 elems->he_6ghz_capa, 3520 sta); 3521 3522 bss_conf->he_support = sta->sta.he_cap.has_he; 3523 if (elems->rsnx && elems->rsnx_len && 3524 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3525 wiphy_ext_feature_isset(local->hw.wiphy, 3526 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3527 bss_conf->twt_protected = true; 3528 else 3529 bss_conf->twt_protected = false; 3530 3531 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3532 } else { 3533 bss_conf->he_support = false; 3534 bss_conf->twt_requester = false; 3535 bss_conf->twt_protected = false; 3536 } 3537 3538 bss_conf->twt_broadcast = 3539 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3540 3541 if (bss_conf->he_support) { 3542 bss_conf->he_bss_color.color = 3543 le32_get_bits(elems->he_operation->he_oper_params, 3544 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3545 bss_conf->he_bss_color.partial = 3546 le32_get_bits(elems->he_operation->he_oper_params, 3547 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3548 bss_conf->he_bss_color.enabled = 3549 !le32_get_bits(elems->he_operation->he_oper_params, 3550 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3551 3552 if (bss_conf->he_bss_color.enabled) 3553 changed |= BSS_CHANGED_HE_BSS_COLOR; 3554 3555 bss_conf->htc_trig_based_pkt_ext = 3556 le32_get_bits(elems->he_operation->he_oper_params, 3557 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3558 bss_conf->frame_time_rts_th = 3559 le32_get_bits(elems->he_operation->he_oper_params, 3560 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3561 3562 bss_conf->uora_exists = !!elems->uora_element; 3563 if (elems->uora_element) 3564 bss_conf->uora_ocw_range = elems->uora_element[0]; 3565 3566 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3567 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3568 /* TODO: OPEN: what happens if BSS color disable is set? */ 3569 } 3570 3571 if (cbss->transmitted_bss) { 3572 bss_conf->nontransmitted = true; 3573 ether_addr_copy(bss_conf->transmitter_bssid, 3574 cbss->transmitted_bss->bssid); 3575 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3576 bss_conf->bssid_index = cbss->bssid_index; 3577 } 3578 3579 /* 3580 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3581 * in their association response, so ignore that data for our own 3582 * configuration. If it changed since the last beacon, we'll get the 3583 * next beacon and update then. 3584 */ 3585 3586 /* 3587 * If an operating mode notification IE is present, override the 3588 * NSS calculation (that would be done in rate_control_rate_init()) 3589 * and use the # of streams from that element. 3590 */ 3591 if (elems->opmode_notif && 3592 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3593 u8 nss; 3594 3595 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3596 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3597 nss += 1; 3598 sta->sta.rx_nss = nss; 3599 } 3600 3601 rate_control_rate_init(sta); 3602 3603 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3604 set_sta_flag(sta, WLAN_STA_MFP); 3605 sta->sta.mfp = true; 3606 } else { 3607 sta->sta.mfp = false; 3608 } 3609 3610 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3611 local->hw.queues >= IEEE80211_NUM_ACS; 3612 3613 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3614 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3615 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3616 if (err) { 3617 sdata_info(sdata, 3618 "failed to move station %pM to desired state\n", 3619 sta->sta.addr); 3620 WARN_ON(__sta_info_destroy(sta)); 3621 mutex_unlock(&sdata->local->sta_mtx); 3622 ret = false; 3623 goto out; 3624 } 3625 3626 if (sdata->wdev.use_4addr) 3627 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3628 3629 mutex_unlock(&sdata->local->sta_mtx); 3630 3631 /* 3632 * Always handle WMM once after association regardless 3633 * of the first value the AP uses. Setting -1 here has 3634 * that effect because the AP values is an unsigned 3635 * 4-bit value. 3636 */ 3637 ifmgd->wmm_last_param_set = -1; 3638 ifmgd->mu_edca_last_param_set = -1; 3639 3640 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3641 ieee80211_set_wmm_default(sdata, false, false); 3642 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3643 elems->wmm_param_len, 3644 elems->mu_edca_param_set)) { 3645 /* still enable QoS since we might have HT/VHT */ 3646 ieee80211_set_wmm_default(sdata, false, true); 3647 /* set the disable-WMM flag in this case to disable 3648 * tracking WMM parameter changes in the beacon if 3649 * the parameters weren't actually valid. Doing so 3650 * avoids changing parameters very strangely when 3651 * the AP is going back and forth between valid and 3652 * invalid parameters. 3653 */ 3654 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3655 } 3656 changed |= BSS_CHANGED_QOS; 3657 3658 if (elems->max_idle_period_ie) { 3659 bss_conf->max_idle_period = 3660 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3661 bss_conf->protected_keep_alive = 3662 !!(elems->max_idle_period_ie->idle_options & 3663 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3664 changed |= BSS_CHANGED_KEEP_ALIVE; 3665 } else { 3666 bss_conf->max_idle_period = 0; 3667 bss_conf->protected_keep_alive = false; 3668 } 3669 3670 /* set assoc capability (AID was already set earlier), 3671 * ieee80211_set_associated() will tell the driver */ 3672 bss_conf->assoc_capability = capab_info; 3673 ieee80211_set_associated(sdata, cbss, changed); 3674 3675 /* 3676 * If we're using 4-addr mode, let the AP know that we're 3677 * doing so, so that it can create the STA VLAN on its side 3678 */ 3679 if (ifmgd->use_4addr) 3680 ieee80211_send_4addr_nullfunc(local, sdata); 3681 3682 /* 3683 * Start timer to probe the connection to the AP now. 3684 * Also start the timer that will detect beacon loss. 3685 */ 3686 ieee80211_sta_reset_beacon_monitor(sdata); 3687 ieee80211_sta_reset_conn_monitor(sdata); 3688 3689 ret = true; 3690 out: 3691 kfree(elems); 3692 kfree(bss_ies); 3693 return ret; 3694 } 3695 3696 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3697 struct ieee80211_mgmt *mgmt, 3698 size_t len) 3699 { 3700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3701 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3702 u16 capab_info, status_code, aid; 3703 struct ieee802_11_elems *elems; 3704 int ac, uapsd_queues = -1; 3705 u8 *pos; 3706 bool reassoc; 3707 struct cfg80211_bss *cbss; 3708 struct ieee80211_event event = { 3709 .type = MLME_EVENT, 3710 .u.mlme.data = ASSOC_EVENT, 3711 }; 3712 struct ieee80211_prep_tx_info info = {}; 3713 3714 sdata_assert_lock(sdata); 3715 3716 if (!assoc_data) 3717 return; 3718 3719 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3720 return; 3721 3722 cbss = assoc_data->bss; 3723 3724 /* 3725 * AssocResp and ReassocResp have identical structure, so process both 3726 * of them in this function. 3727 */ 3728 3729 if (len < 24 + 6) 3730 return; 3731 3732 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3733 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3734 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3735 pos = mgmt->u.assoc_resp.variable; 3736 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3737 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3738 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3739 aid = 0; /* TODO */ 3740 } 3741 3742 /* 3743 * Note: this may not be perfect, AP might misbehave - if 3744 * anyone needs to rely on perfect complete notification 3745 * with the exact right subtype, then we need to track what 3746 * we actually transmitted. 3747 */ 3748 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3749 IEEE80211_STYPE_ASSOC_REQ; 3750 3751 sdata_info(sdata, 3752 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3753 reassoc ? "Rea" : "A", mgmt->sa, 3754 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3755 3756 if (assoc_data->fils_kek_len && 3757 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3758 return; 3759 3760 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3761 mgmt->bssid, assoc_data->bss->bssid); 3762 if (!elems) 3763 goto notify_driver; 3764 3765 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3766 elems->timeout_int && 3767 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3768 u32 tu, ms; 3769 3770 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss, 3771 le32_to_cpu(elems->timeout_int->value)); 3772 3773 tu = le32_to_cpu(elems->timeout_int->value); 3774 ms = tu * 1024 / 1000; 3775 sdata_info(sdata, 3776 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3777 mgmt->sa, tu, ms); 3778 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3779 assoc_data->timeout_started = true; 3780 if (ms > IEEE80211_ASSOC_TIMEOUT) 3781 run_again(sdata, assoc_data->timeout); 3782 goto notify_driver; 3783 } 3784 3785 if (status_code != WLAN_STATUS_SUCCESS) { 3786 sdata_info(sdata, "%pM denied association (code=%d)\n", 3787 mgmt->sa, status_code); 3788 ieee80211_destroy_assoc_data(sdata, false, false); 3789 event.u.mlme.status = MLME_DENIED; 3790 event.u.mlme.reason = status_code; 3791 drv_event_callback(sdata->local, sdata, &event); 3792 } else { 3793 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3794 /* oops -- internal error -- send timeout for now */ 3795 ieee80211_destroy_assoc_data(sdata, false, false); 3796 cfg80211_assoc_timeout(sdata->dev, cbss); 3797 goto notify_driver; 3798 } 3799 event.u.mlme.status = MLME_SUCCESS; 3800 drv_event_callback(sdata->local, sdata, &event); 3801 sdata_info(sdata, "associated\n"); 3802 3803 /* 3804 * destroy assoc_data afterwards, as otherwise an idle 3805 * recalc after assoc_data is NULL but before associated 3806 * is set can cause the interface to go idle 3807 */ 3808 ieee80211_destroy_assoc_data(sdata, true, false); 3809 3810 /* get uapsd queues configuration */ 3811 uapsd_queues = 0; 3812 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3813 if (sdata->tx_conf[ac].uapsd) 3814 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3815 3816 info.success = 1; 3817 } 3818 3819 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3820 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3821 notify_driver: 3822 drv_mgd_complete_tx(sdata->local, sdata, &info); 3823 kfree(elems); 3824 } 3825 3826 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3827 struct ieee80211_mgmt *mgmt, size_t len, 3828 struct ieee80211_rx_status *rx_status) 3829 { 3830 struct ieee80211_local *local = sdata->local; 3831 struct ieee80211_bss *bss; 3832 struct ieee80211_channel *channel; 3833 3834 sdata_assert_lock(sdata); 3835 3836 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3837 ieee80211_rx_status_to_khz(rx_status)); 3838 if (!channel) 3839 return; 3840 3841 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3842 if (bss) { 3843 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3844 ieee80211_rx_bss_put(local, bss); 3845 } 3846 } 3847 3848 3849 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3850 struct sk_buff *skb) 3851 { 3852 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3853 struct ieee80211_if_managed *ifmgd; 3854 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3855 struct ieee80211_channel *channel; 3856 size_t baselen, len = skb->len; 3857 3858 ifmgd = &sdata->u.mgd; 3859 3860 sdata_assert_lock(sdata); 3861 3862 /* 3863 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3864 * "If a 6 GHz AP receives a Probe Request frame and responds with 3865 * a Probe Response frame [..], the Address 1 field of the Probe 3866 * Response frame shall be set to the broadcast address [..]" 3867 * So, on 6GHz band we should also accept broadcast responses. 3868 */ 3869 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3870 rx_status->freq); 3871 if (!channel) 3872 return; 3873 3874 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3875 (channel->band != NL80211_BAND_6GHZ || 3876 !is_broadcast_ether_addr(mgmt->da))) 3877 return; /* ignore ProbeResp to foreign address */ 3878 3879 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3880 if (baselen > len) 3881 return; 3882 3883 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3884 3885 if (ifmgd->associated && 3886 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3887 ieee80211_reset_ap_probe(sdata); 3888 } 3889 3890 /* 3891 * This is the canonical list of information elements we care about, 3892 * the filter code also gives us all changes to the Microsoft OUI 3893 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3894 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3895 * changes to requested client power. 3896 * 3897 * We implement beacon filtering in software since that means we can 3898 * avoid processing the frame here and in cfg80211, and userspace 3899 * will not be able to tell whether the hardware supports it or not. 3900 * 3901 * XXX: This list needs to be dynamic -- userspace needs to be able to 3902 * add items it requires. It also needs to be able to tell us to 3903 * look out for other vendor IEs. 3904 */ 3905 static const u64 care_about_ies = 3906 (1ULL << WLAN_EID_COUNTRY) | 3907 (1ULL << WLAN_EID_ERP_INFO) | 3908 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3909 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3910 (1ULL << WLAN_EID_HT_CAPABILITY) | 3911 (1ULL << WLAN_EID_HT_OPERATION) | 3912 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3913 3914 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3915 struct ieee80211_if_managed *ifmgd, 3916 struct ieee80211_bss_conf *bss_conf, 3917 struct ieee80211_local *local, 3918 struct ieee80211_rx_status *rx_status) 3919 { 3920 /* Track average RSSI from the Beacon frames of the current AP */ 3921 3922 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3923 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3924 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3925 ifmgd->last_cqm_event_signal = 0; 3926 ifmgd->count_beacon_signal = 1; 3927 ifmgd->last_ave_beacon_signal = 0; 3928 } else { 3929 ifmgd->count_beacon_signal++; 3930 } 3931 3932 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3933 3934 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3935 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3936 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3937 int last_sig = ifmgd->last_ave_beacon_signal; 3938 struct ieee80211_event event = { 3939 .type = RSSI_EVENT, 3940 }; 3941 3942 /* 3943 * if signal crosses either of the boundaries, invoke callback 3944 * with appropriate parameters 3945 */ 3946 if (sig > ifmgd->rssi_max_thold && 3947 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3948 ifmgd->last_ave_beacon_signal = sig; 3949 event.u.rssi.data = RSSI_EVENT_HIGH; 3950 drv_event_callback(local, sdata, &event); 3951 } else if (sig < ifmgd->rssi_min_thold && 3952 (last_sig >= ifmgd->rssi_max_thold || 3953 last_sig == 0)) { 3954 ifmgd->last_ave_beacon_signal = sig; 3955 event.u.rssi.data = RSSI_EVENT_LOW; 3956 drv_event_callback(local, sdata, &event); 3957 } 3958 } 3959 3960 if (bss_conf->cqm_rssi_thold && 3961 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3962 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3963 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3964 int last_event = ifmgd->last_cqm_event_signal; 3965 int thold = bss_conf->cqm_rssi_thold; 3966 int hyst = bss_conf->cqm_rssi_hyst; 3967 3968 if (sig < thold && 3969 (last_event == 0 || sig < last_event - hyst)) { 3970 ifmgd->last_cqm_event_signal = sig; 3971 ieee80211_cqm_rssi_notify( 3972 &sdata->vif, 3973 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3974 sig, GFP_KERNEL); 3975 } else if (sig > thold && 3976 (last_event == 0 || sig > last_event + hyst)) { 3977 ifmgd->last_cqm_event_signal = sig; 3978 ieee80211_cqm_rssi_notify( 3979 &sdata->vif, 3980 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3981 sig, GFP_KERNEL); 3982 } 3983 } 3984 3985 if (bss_conf->cqm_rssi_low && 3986 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3987 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3988 int last_event = ifmgd->last_cqm_event_signal; 3989 int low = bss_conf->cqm_rssi_low; 3990 int high = bss_conf->cqm_rssi_high; 3991 3992 if (sig < low && 3993 (last_event == 0 || last_event >= low)) { 3994 ifmgd->last_cqm_event_signal = sig; 3995 ieee80211_cqm_rssi_notify( 3996 &sdata->vif, 3997 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3998 sig, GFP_KERNEL); 3999 } else if (sig > high && 4000 (last_event == 0 || last_event <= high)) { 4001 ifmgd->last_cqm_event_signal = sig; 4002 ieee80211_cqm_rssi_notify( 4003 &sdata->vif, 4004 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 4005 sig, GFP_KERNEL); 4006 } 4007 } 4008 } 4009 4010 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 4011 struct cfg80211_bss *bss) 4012 { 4013 if (ether_addr_equal(tx_bssid, bss->bssid)) 4014 return true; 4015 if (!bss->transmitted_bss) 4016 return false; 4017 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 4018 } 4019 4020 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 4021 struct ieee80211_hdr *hdr, size_t len, 4022 struct ieee80211_rx_status *rx_status) 4023 { 4024 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4025 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 4026 struct ieee80211_mgmt *mgmt = (void *) hdr; 4027 size_t baselen; 4028 struct ieee802_11_elems *elems; 4029 struct ieee80211_local *local = sdata->local; 4030 struct ieee80211_chanctx_conf *chanctx_conf; 4031 struct ieee80211_channel *chan; 4032 struct sta_info *sta; 4033 u32 changed = 0; 4034 bool erp_valid; 4035 u8 erp_value = 0; 4036 u32 ncrc = 0; 4037 u8 *bssid, *variable = mgmt->u.beacon.variable; 4038 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4039 4040 sdata_assert_lock(sdata); 4041 4042 /* Process beacon from the current BSS */ 4043 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4044 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4045 struct ieee80211_ext *ext = (void *) mgmt; 4046 4047 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4048 variable = ext->u.s1g_short_beacon.variable; 4049 else 4050 variable = ext->u.s1g_beacon.variable; 4051 } 4052 4053 baselen = (u8 *) variable - (u8 *) mgmt; 4054 if (baselen > len) 4055 return; 4056 4057 rcu_read_lock(); 4058 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4059 if (!chanctx_conf) { 4060 rcu_read_unlock(); 4061 return; 4062 } 4063 4064 if (ieee80211_rx_status_to_khz(rx_status) != 4065 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4066 rcu_read_unlock(); 4067 return; 4068 } 4069 chan = chanctx_conf->def.chan; 4070 rcu_read_unlock(); 4071 4072 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4073 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4074 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4075 bssid, 4076 ifmgd->assoc_data->bss->bssid); 4077 if (!elems) 4078 return; 4079 4080 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4081 4082 if (elems->dtim_period) 4083 ifmgd->dtim_period = elems->dtim_period; 4084 ifmgd->have_beacon = true; 4085 ifmgd->assoc_data->need_beacon = false; 4086 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4087 sdata->vif.bss_conf.sync_tsf = 4088 le64_to_cpu(mgmt->u.beacon.timestamp); 4089 sdata->vif.bss_conf.sync_device_ts = 4090 rx_status->device_timestamp; 4091 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4092 } 4093 4094 if (elems->mbssid_config_ie) 4095 bss_conf->profile_periodicity = 4096 elems->mbssid_config_ie->profile_periodicity; 4097 else 4098 bss_conf->profile_periodicity = 0; 4099 4100 if (elems->ext_capab_len >= 11 && 4101 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4102 bss_conf->ema_ap = true; 4103 else 4104 bss_conf->ema_ap = false; 4105 4106 /* continue assoc process */ 4107 ifmgd->assoc_data->timeout = jiffies; 4108 ifmgd->assoc_data->timeout_started = true; 4109 run_again(sdata, ifmgd->assoc_data->timeout); 4110 kfree(elems); 4111 return; 4112 } 4113 4114 if (!ifmgd->associated || 4115 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4116 return; 4117 bssid = ifmgd->associated->bssid; 4118 4119 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4120 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4121 local, rx_status); 4122 4123 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4124 mlme_dbg_ratelimited(sdata, 4125 "cancelling AP probe due to a received beacon\n"); 4126 ieee80211_reset_ap_probe(sdata); 4127 } 4128 4129 /* 4130 * Push the beacon loss detection into the future since 4131 * we are processing a beacon from the AP just now. 4132 */ 4133 ieee80211_sta_reset_beacon_monitor(sdata); 4134 4135 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4136 * element (which carries the beacon interval). Don't forget to add a 4137 * bit to care_about_ies[] above if mac80211 is interested in a 4138 * changing S1G element. 4139 */ 4140 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4141 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4142 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4143 false, care_about_ies, ncrc, 4144 mgmt->bssid, bssid); 4145 if (!elems) 4146 return; 4147 ncrc = elems->crc; 4148 4149 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4150 ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { 4151 if (local->hw.conf.dynamic_ps_timeout > 0) { 4152 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4153 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4154 ieee80211_hw_config(local, 4155 IEEE80211_CONF_CHANGE_PS); 4156 } 4157 ieee80211_send_nullfunc(local, sdata, false); 4158 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4159 local->pspolling = true; 4160 4161 /* 4162 * Here is assumed that the driver will be 4163 * able to send ps-poll frame and receive a 4164 * response even though power save mode is 4165 * enabled, but some drivers might require 4166 * to disable power save here. This needs 4167 * to be investigated. 4168 */ 4169 ieee80211_send_pspoll(local, sdata); 4170 } 4171 } 4172 4173 if (sdata->vif.p2p || 4174 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4175 struct ieee80211_p2p_noa_attr noa = {}; 4176 int ret; 4177 4178 ret = cfg80211_get_p2p_attr(variable, 4179 len - baselen, 4180 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4181 (u8 *) &noa, sizeof(noa)); 4182 if (ret >= 2) { 4183 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4184 /* valid noa_attr and index changed */ 4185 sdata->u.mgd.p2p_noa_index = noa.index; 4186 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4187 changed |= BSS_CHANGED_P2P_PS; 4188 /* 4189 * make sure we update all information, the CRC 4190 * mechanism doesn't look at P2P attributes. 4191 */ 4192 ifmgd->beacon_crc_valid = false; 4193 } 4194 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4195 /* noa_attr not found and we had valid noa_attr before */ 4196 sdata->u.mgd.p2p_noa_index = -1; 4197 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4198 changed |= BSS_CHANGED_P2P_PS; 4199 ifmgd->beacon_crc_valid = false; 4200 } 4201 } 4202 4203 if (ifmgd->csa_waiting_bcn) 4204 ieee80211_chswitch_post_beacon(sdata); 4205 4206 /* 4207 * Update beacon timing and dtim count on every beacon appearance. This 4208 * will allow the driver to use the most updated values. Do it before 4209 * comparing this one with last received beacon. 4210 * IMPORTANT: These parameters would possibly be out of sync by the time 4211 * the driver will use them. The synchronized view is currently 4212 * guaranteed only in certain callbacks. 4213 */ 4214 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4215 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4216 sdata->vif.bss_conf.sync_tsf = 4217 le64_to_cpu(mgmt->u.beacon.timestamp); 4218 sdata->vif.bss_conf.sync_device_ts = 4219 rx_status->device_timestamp; 4220 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4221 } 4222 4223 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4224 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4225 goto free; 4226 ifmgd->beacon_crc = ncrc; 4227 ifmgd->beacon_crc_valid = true; 4228 4229 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4230 4231 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4232 rx_status->device_timestamp, 4233 elems, true); 4234 4235 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4236 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4237 elems->wmm_param_len, 4238 elems->mu_edca_param_set)) 4239 changed |= BSS_CHANGED_QOS; 4240 4241 /* 4242 * If we haven't had a beacon before, tell the driver about the 4243 * DTIM period (and beacon timing if desired) now. 4244 */ 4245 if (!ifmgd->have_beacon) { 4246 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4247 bss_conf->dtim_period = elems->dtim_period ?: 1; 4248 4249 changed |= BSS_CHANGED_BEACON_INFO; 4250 ifmgd->have_beacon = true; 4251 4252 mutex_lock(&local->iflist_mtx); 4253 ieee80211_recalc_ps(local); 4254 mutex_unlock(&local->iflist_mtx); 4255 4256 ieee80211_recalc_ps_vif(sdata); 4257 } 4258 4259 if (elems->erp_info) { 4260 erp_valid = true; 4261 erp_value = elems->erp_info[0]; 4262 } else { 4263 erp_valid = false; 4264 } 4265 4266 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4267 changed |= ieee80211_handle_bss_capability(sdata, 4268 le16_to_cpu(mgmt->u.beacon.capab_info), 4269 erp_valid, erp_value); 4270 4271 mutex_lock(&local->sta_mtx); 4272 sta = sta_info_get(sdata, bssid); 4273 4274 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4275 4276 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4277 elems->vht_cap_elem, elems->ht_operation, 4278 elems->vht_operation, elems->he_operation, 4279 elems->s1g_oper, bssid, &changed)) { 4280 mutex_unlock(&local->sta_mtx); 4281 sdata_info(sdata, 4282 "failed to follow AP %pM bandwidth change, disconnect\n", 4283 bssid); 4284 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4285 WLAN_REASON_DEAUTH_LEAVING, 4286 true, deauth_buf); 4287 ieee80211_report_disconnect(sdata, deauth_buf, 4288 sizeof(deauth_buf), true, 4289 WLAN_REASON_DEAUTH_LEAVING, 4290 false); 4291 goto free; 4292 } 4293 4294 if (sta && elems->opmode_notif) 4295 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, 4296 rx_status->band); 4297 mutex_unlock(&local->sta_mtx); 4298 4299 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4300 elems->country_elem, 4301 elems->country_elem_len, 4302 elems->pwr_constr_elem, 4303 elems->cisco_dtpc_elem); 4304 4305 ieee80211_bss_info_change_notify(sdata, changed); 4306 free: 4307 kfree(elems); 4308 } 4309 4310 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4311 struct sk_buff *skb) 4312 { 4313 struct ieee80211_rx_status *rx_status; 4314 struct ieee80211_hdr *hdr; 4315 u16 fc; 4316 4317 rx_status = (struct ieee80211_rx_status *) skb->cb; 4318 hdr = (struct ieee80211_hdr *) skb->data; 4319 fc = le16_to_cpu(hdr->frame_control); 4320 4321 sdata_lock(sdata); 4322 switch (fc & IEEE80211_FCTL_STYPE) { 4323 case IEEE80211_STYPE_S1G_BEACON: 4324 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4325 break; 4326 } 4327 sdata_unlock(sdata); 4328 } 4329 4330 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4331 struct sk_buff *skb) 4332 { 4333 struct ieee80211_rx_status *rx_status; 4334 struct ieee80211_mgmt *mgmt; 4335 u16 fc; 4336 int ies_len; 4337 4338 rx_status = (struct ieee80211_rx_status *) skb->cb; 4339 mgmt = (struct ieee80211_mgmt *) skb->data; 4340 fc = le16_to_cpu(mgmt->frame_control); 4341 4342 sdata_lock(sdata); 4343 4344 switch (fc & IEEE80211_FCTL_STYPE) { 4345 case IEEE80211_STYPE_BEACON: 4346 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4347 skb->len, rx_status); 4348 break; 4349 case IEEE80211_STYPE_PROBE_RESP: 4350 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4351 break; 4352 case IEEE80211_STYPE_AUTH: 4353 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4354 break; 4355 case IEEE80211_STYPE_DEAUTH: 4356 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4357 break; 4358 case IEEE80211_STYPE_DISASSOC: 4359 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4360 break; 4361 case IEEE80211_STYPE_ASSOC_RESP: 4362 case IEEE80211_STYPE_REASSOC_RESP: 4363 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4364 break; 4365 case IEEE80211_STYPE_ACTION: 4366 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4367 struct ieee802_11_elems *elems; 4368 4369 ies_len = skb->len - 4370 offsetof(struct ieee80211_mgmt, 4371 u.action.u.chan_switch.variable); 4372 4373 if (ies_len < 0) 4374 break; 4375 4376 /* CSA IE cannot be overridden, no need for BSSID */ 4377 elems = ieee802_11_parse_elems( 4378 mgmt->u.action.u.chan_switch.variable, 4379 ies_len, true, mgmt->bssid, NULL); 4380 4381 if (elems && !elems->parse_error) 4382 ieee80211_sta_process_chanswitch(sdata, 4383 rx_status->mactime, 4384 rx_status->device_timestamp, 4385 elems, false); 4386 kfree(elems); 4387 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4388 struct ieee802_11_elems *elems; 4389 4390 ies_len = skb->len - 4391 offsetof(struct ieee80211_mgmt, 4392 u.action.u.ext_chan_switch.variable); 4393 4394 if (ies_len < 0) 4395 break; 4396 4397 /* 4398 * extended CSA IE can't be overridden, no need for 4399 * BSSID 4400 */ 4401 elems = ieee802_11_parse_elems( 4402 mgmt->u.action.u.ext_chan_switch.variable, 4403 ies_len, true, mgmt->bssid, NULL); 4404 4405 if (elems && !elems->parse_error) { 4406 /* for the handling code pretend it was an IE */ 4407 elems->ext_chansw_ie = 4408 &mgmt->u.action.u.ext_chan_switch.data; 4409 4410 ieee80211_sta_process_chanswitch(sdata, 4411 rx_status->mactime, 4412 rx_status->device_timestamp, 4413 elems, false); 4414 } 4415 4416 kfree(elems); 4417 } 4418 break; 4419 } 4420 sdata_unlock(sdata); 4421 } 4422 4423 static void ieee80211_sta_timer(struct timer_list *t) 4424 { 4425 struct ieee80211_sub_if_data *sdata = 4426 from_timer(sdata, t, u.mgd.timer); 4427 4428 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4429 } 4430 4431 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4432 u8 *bssid, u8 reason, bool tx) 4433 { 4434 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4435 4436 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4437 tx, frame_buf); 4438 4439 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4440 reason, false); 4441 } 4442 4443 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4444 { 4445 struct ieee80211_local *local = sdata->local; 4446 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4447 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4448 u32 tx_flags = 0; 4449 u16 trans = 1; 4450 u16 status = 0; 4451 struct ieee80211_prep_tx_info info = { 4452 .subtype = IEEE80211_STYPE_AUTH, 4453 }; 4454 4455 sdata_assert_lock(sdata); 4456 4457 if (WARN_ON_ONCE(!auth_data)) 4458 return -EINVAL; 4459 4460 auth_data->tries++; 4461 4462 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4463 sdata_info(sdata, "authentication with %pM timed out\n", 4464 auth_data->bss->bssid); 4465 4466 /* 4467 * Most likely AP is not in the range so remove the 4468 * bss struct for that AP. 4469 */ 4470 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4471 4472 return -ETIMEDOUT; 4473 } 4474 4475 if (auth_data->algorithm == WLAN_AUTH_SAE) 4476 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4477 4478 drv_mgd_prepare_tx(local, sdata, &info); 4479 4480 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4481 auth_data->bss->bssid, auth_data->tries, 4482 IEEE80211_AUTH_MAX_TRIES); 4483 4484 auth_data->expected_transaction = 2; 4485 4486 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4487 trans = auth_data->sae_trans; 4488 status = auth_data->sae_status; 4489 auth_data->expected_transaction = trans; 4490 } 4491 4492 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4493 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4494 IEEE80211_TX_INTFL_MLME_CONN_TX; 4495 4496 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4497 auth_data->data, auth_data->data_len, 4498 auth_data->bss->bssid, 4499 auth_data->bss->bssid, NULL, 0, 0, 4500 tx_flags); 4501 4502 if (tx_flags == 0) { 4503 if (auth_data->algorithm == WLAN_AUTH_SAE) 4504 auth_data->timeout = jiffies + 4505 IEEE80211_AUTH_TIMEOUT_SAE; 4506 else 4507 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4508 } else { 4509 auth_data->timeout = 4510 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4511 } 4512 4513 auth_data->timeout_started = true; 4514 run_again(sdata, auth_data->timeout); 4515 4516 return 0; 4517 } 4518 4519 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4520 { 4521 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4522 struct ieee80211_local *local = sdata->local; 4523 int ret; 4524 4525 sdata_assert_lock(sdata); 4526 4527 assoc_data->tries++; 4528 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4529 sdata_info(sdata, "association with %pM timed out\n", 4530 assoc_data->bss->bssid); 4531 4532 /* 4533 * Most likely AP is not in the range so remove the 4534 * bss struct for that AP. 4535 */ 4536 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4537 4538 return -ETIMEDOUT; 4539 } 4540 4541 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4542 assoc_data->bss->bssid, assoc_data->tries, 4543 IEEE80211_ASSOC_MAX_TRIES); 4544 ret = ieee80211_send_assoc(sdata); 4545 if (ret) 4546 return ret; 4547 4548 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4549 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4550 assoc_data->timeout_started = true; 4551 run_again(sdata, assoc_data->timeout); 4552 } else { 4553 assoc_data->timeout = 4554 round_jiffies_up(jiffies + 4555 IEEE80211_ASSOC_TIMEOUT_LONG); 4556 assoc_data->timeout_started = true; 4557 run_again(sdata, assoc_data->timeout); 4558 } 4559 4560 return 0; 4561 } 4562 4563 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4564 __le16 fc, bool acked) 4565 { 4566 struct ieee80211_local *local = sdata->local; 4567 4568 sdata->u.mgd.status_fc = fc; 4569 sdata->u.mgd.status_acked = acked; 4570 sdata->u.mgd.status_received = true; 4571 4572 ieee80211_queue_work(&local->hw, &sdata->work); 4573 } 4574 4575 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4576 { 4577 struct ieee80211_local *local = sdata->local; 4578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4579 4580 sdata_lock(sdata); 4581 4582 if (ifmgd->status_received) { 4583 __le16 fc = ifmgd->status_fc; 4584 bool status_acked = ifmgd->status_acked; 4585 4586 ifmgd->status_received = false; 4587 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4588 if (status_acked) { 4589 if (ifmgd->auth_data->algorithm == 4590 WLAN_AUTH_SAE) 4591 ifmgd->auth_data->timeout = 4592 jiffies + 4593 IEEE80211_AUTH_TIMEOUT_SAE; 4594 else 4595 ifmgd->auth_data->timeout = 4596 jiffies + 4597 IEEE80211_AUTH_TIMEOUT_SHORT; 4598 run_again(sdata, ifmgd->auth_data->timeout); 4599 } else { 4600 ifmgd->auth_data->timeout = jiffies - 1; 4601 } 4602 ifmgd->auth_data->timeout_started = true; 4603 } else if (ifmgd->assoc_data && 4604 (ieee80211_is_assoc_req(fc) || 4605 ieee80211_is_reassoc_req(fc))) { 4606 if (status_acked) { 4607 ifmgd->assoc_data->timeout = 4608 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4609 run_again(sdata, ifmgd->assoc_data->timeout); 4610 } else { 4611 ifmgd->assoc_data->timeout = jiffies - 1; 4612 } 4613 ifmgd->assoc_data->timeout_started = true; 4614 } 4615 } 4616 4617 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4618 time_after(jiffies, ifmgd->auth_data->timeout)) { 4619 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 4620 /* 4621 * ok ... we waited for assoc or continuation but 4622 * userspace didn't do it, so kill the auth data 4623 */ 4624 ieee80211_destroy_auth_data(sdata, false); 4625 } else if (ieee80211_auth(sdata)) { 4626 u8 bssid[ETH_ALEN]; 4627 struct ieee80211_event event = { 4628 .type = MLME_EVENT, 4629 .u.mlme.data = AUTH_EVENT, 4630 .u.mlme.status = MLME_TIMEOUT, 4631 }; 4632 4633 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4634 4635 ieee80211_destroy_auth_data(sdata, false); 4636 4637 cfg80211_auth_timeout(sdata->dev, bssid); 4638 drv_event_callback(sdata->local, sdata, &event); 4639 } 4640 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4641 run_again(sdata, ifmgd->auth_data->timeout); 4642 4643 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4644 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4645 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4646 ieee80211_do_assoc(sdata)) { 4647 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4648 struct ieee80211_event event = { 4649 .type = MLME_EVENT, 4650 .u.mlme.data = ASSOC_EVENT, 4651 .u.mlme.status = MLME_TIMEOUT, 4652 }; 4653 4654 ieee80211_destroy_assoc_data(sdata, false, false); 4655 cfg80211_assoc_timeout(sdata->dev, bss); 4656 drv_event_callback(sdata->local, sdata, &event); 4657 } 4658 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4659 run_again(sdata, ifmgd->assoc_data->timeout); 4660 4661 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4662 ifmgd->associated) { 4663 u8 bssid[ETH_ALEN]; 4664 int max_tries; 4665 4666 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4667 4668 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4669 max_tries = max_nullfunc_tries; 4670 else 4671 max_tries = max_probe_tries; 4672 4673 /* ACK received for nullfunc probing frame */ 4674 if (!ifmgd->probe_send_count) 4675 ieee80211_reset_ap_probe(sdata); 4676 else if (ifmgd->nullfunc_failed) { 4677 if (ifmgd->probe_send_count < max_tries) { 4678 mlme_dbg(sdata, 4679 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4680 bssid, ifmgd->probe_send_count, 4681 max_tries); 4682 ieee80211_mgd_probe_ap_send(sdata); 4683 } else { 4684 mlme_dbg(sdata, 4685 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4686 bssid); 4687 ieee80211_sta_connection_lost(sdata, bssid, 4688 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4689 false); 4690 } 4691 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4692 run_again(sdata, ifmgd->probe_timeout); 4693 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4694 mlme_dbg(sdata, 4695 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4696 bssid, probe_wait_ms); 4697 ieee80211_sta_connection_lost(sdata, bssid, 4698 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4699 } else if (ifmgd->probe_send_count < max_tries) { 4700 mlme_dbg(sdata, 4701 "No probe response from AP %pM after %dms, try %d/%i\n", 4702 bssid, probe_wait_ms, 4703 ifmgd->probe_send_count, max_tries); 4704 ieee80211_mgd_probe_ap_send(sdata); 4705 } else { 4706 /* 4707 * We actually lost the connection ... or did we? 4708 * Let's make sure! 4709 */ 4710 mlme_dbg(sdata, 4711 "No probe response from AP %pM after %dms, disconnecting.\n", 4712 bssid, probe_wait_ms); 4713 4714 ieee80211_sta_connection_lost(sdata, bssid, 4715 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4716 } 4717 } 4718 4719 sdata_unlock(sdata); 4720 } 4721 4722 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4723 { 4724 struct ieee80211_sub_if_data *sdata = 4725 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4727 4728 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4729 return; 4730 4731 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4732 return; 4733 4734 sdata->u.mgd.connection_loss = false; 4735 ieee80211_queue_work(&sdata->local->hw, 4736 &sdata->u.mgd.beacon_connection_loss_work); 4737 } 4738 4739 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4740 { 4741 struct ieee80211_sub_if_data *sdata = 4742 from_timer(sdata, t, u.mgd.conn_mon_timer); 4743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4744 struct ieee80211_local *local = sdata->local; 4745 struct sta_info *sta; 4746 unsigned long timeout; 4747 4748 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4749 return; 4750 4751 sta = sta_info_get(sdata, ifmgd->bssid); 4752 if (!sta) 4753 return; 4754 4755 timeout = sta->status_stats.last_ack; 4756 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4757 timeout = sta->rx_stats.last_rx; 4758 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4759 4760 /* If timeout is after now, then update timer to fire at 4761 * the later date, but do not actually probe at this time. 4762 */ 4763 if (time_is_after_jiffies(timeout)) { 4764 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4765 return; 4766 } 4767 4768 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4769 } 4770 4771 static void ieee80211_sta_monitor_work(struct work_struct *work) 4772 { 4773 struct ieee80211_sub_if_data *sdata = 4774 container_of(work, struct ieee80211_sub_if_data, 4775 u.mgd.monitor_work); 4776 4777 ieee80211_mgd_probe_ap(sdata, false); 4778 } 4779 4780 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4781 { 4782 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4783 __ieee80211_stop_poll(sdata); 4784 4785 /* let's probe the connection once */ 4786 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4787 ieee80211_queue_work(&sdata->local->hw, 4788 &sdata->u.mgd.monitor_work); 4789 } 4790 } 4791 4792 #ifdef CONFIG_PM 4793 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4794 { 4795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4796 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4797 4798 sdata_lock(sdata); 4799 4800 if (ifmgd->auth_data || ifmgd->assoc_data) { 4801 const u8 *bssid = ifmgd->auth_data ? 4802 ifmgd->auth_data->bss->bssid : 4803 ifmgd->assoc_data->bss->bssid; 4804 4805 /* 4806 * If we are trying to authenticate / associate while suspending, 4807 * cfg80211 won't know and won't actually abort those attempts, 4808 * thus we need to do that ourselves. 4809 */ 4810 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4811 IEEE80211_STYPE_DEAUTH, 4812 WLAN_REASON_DEAUTH_LEAVING, 4813 false, frame_buf); 4814 if (ifmgd->assoc_data) 4815 ieee80211_destroy_assoc_data(sdata, false, true); 4816 if (ifmgd->auth_data) 4817 ieee80211_destroy_auth_data(sdata, false); 4818 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4819 IEEE80211_DEAUTH_FRAME_LEN, 4820 false); 4821 } 4822 4823 /* This is a bit of a hack - we should find a better and more generic 4824 * solution to this. Normally when suspending, cfg80211 will in fact 4825 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4826 * auth (not so important) or assoc (this is the problem) process. 4827 * 4828 * As a consequence, it can happen that we are in the process of both 4829 * associating and suspending, and receive an association response 4830 * after cfg80211 has checked if it needs to disconnect, but before 4831 * we actually set the flag to drop incoming frames. This will then 4832 * cause the workqueue flush to process the association response in 4833 * the suspend, resulting in a successful association just before it 4834 * tries to remove the interface from the driver, which now though 4835 * has a channel context assigned ... this results in issues. 4836 * 4837 * To work around this (for now) simply deauth here again if we're 4838 * now connected. 4839 */ 4840 if (ifmgd->associated && !sdata->local->wowlan) { 4841 u8 bssid[ETH_ALEN]; 4842 struct cfg80211_deauth_request req = { 4843 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4844 .bssid = bssid, 4845 }; 4846 4847 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4848 ieee80211_mgd_deauth(sdata, &req); 4849 } 4850 4851 sdata_unlock(sdata); 4852 } 4853 4854 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4855 { 4856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4857 4858 sdata_lock(sdata); 4859 if (!ifmgd->associated) { 4860 sdata_unlock(sdata); 4861 return; 4862 } 4863 4864 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4865 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4866 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4867 ieee80211_sta_connection_lost(sdata, 4868 ifmgd->associated->bssid, 4869 WLAN_REASON_UNSPECIFIED, 4870 true); 4871 sdata_unlock(sdata); 4872 return; 4873 } 4874 sdata_unlock(sdata); 4875 } 4876 #endif 4877 4878 /* interface setup */ 4879 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4880 { 4881 struct ieee80211_if_managed *ifmgd; 4882 4883 ifmgd = &sdata->u.mgd; 4884 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4885 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4886 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4887 ieee80211_beacon_connection_loss_work); 4888 INIT_WORK(&ifmgd->csa_connection_drop_work, 4889 ieee80211_csa_connection_drop_work); 4890 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4891 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4892 ieee80211_tdls_peer_del_work); 4893 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4894 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4895 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4896 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4897 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4898 ieee80211_sta_handle_tspec_ac_params_wk); 4899 4900 ifmgd->flags = 0; 4901 ifmgd->powersave = sdata->wdev.ps; 4902 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4903 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4904 ifmgd->p2p_noa_index = -1; 4905 4906 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4907 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4908 else 4909 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4910 4911 /* Setup TDLS data */ 4912 spin_lock_init(&ifmgd->teardown_lock); 4913 ifmgd->teardown_skb = NULL; 4914 ifmgd->orig_teardown_skb = NULL; 4915 } 4916 4917 /* scan finished notification */ 4918 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4919 { 4920 struct ieee80211_sub_if_data *sdata; 4921 4922 /* Restart STA timers */ 4923 rcu_read_lock(); 4924 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4925 if (ieee80211_sdata_running(sdata)) 4926 ieee80211_restart_sta_timer(sdata); 4927 } 4928 rcu_read_unlock(); 4929 } 4930 4931 static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata, 4932 struct cfg80211_bss *cbss) 4933 { 4934 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4936 const struct element *ht_cap_elem, *vht_cap_elem; 4937 const struct cfg80211_bss_ies *ies; 4938 const struct ieee80211_ht_cap *ht_cap; 4939 const struct ieee80211_vht_cap *vht_cap; 4940 const struct ieee80211_he_cap_elem *he_cap; 4941 const struct element *he_cap_elem; 4942 u16 mcs_80_map, mcs_160_map; 4943 int i, mcs_nss_size; 4944 bool support_160; 4945 u8 chains = 1; 4946 4947 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4948 return chains; 4949 4950 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4951 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4952 ht_cap = (void *)ht_cap_elem->data; 4953 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4954 /* 4955 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4956 * "Tx Unequal Modulation Supported" fields. 4957 */ 4958 } 4959 4960 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4961 return chains; 4962 4963 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4964 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4965 u8 nss; 4966 u16 tx_mcs_map; 4967 4968 vht_cap = (void *)vht_cap_elem->data; 4969 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4970 for (nss = 8; nss > 0; nss--) { 4971 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4972 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4973 break; 4974 } 4975 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4976 chains = max(chains, nss); 4977 } 4978 4979 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE) 4980 return chains; 4981 4982 ies = rcu_dereference(cbss->ies); 4983 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4984 ies->data, ies->len); 4985 4986 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4987 return chains; 4988 4989 /* skip one byte ext_tag_id */ 4990 he_cap = (void *)(he_cap_elem->data + 1); 4991 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4992 4993 /* invalid HE IE */ 4994 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4995 return chains; 4996 4997 /* mcs_nss is right after he_cap info */ 4998 he_mcs_nss_supp = (void *)(he_cap + 1); 4999 5000 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5001 5002 for (i = 7; i >= 0; i--) { 5003 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5004 5005 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5006 chains = max_t(u8, chains, i + 1); 5007 break; 5008 } 5009 } 5010 5011 support_160 = he_cap->phy_cap_info[0] & 5012 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5013 5014 if (!support_160) 5015 return chains; 5016 5017 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5018 for (i = 7; i >= 0; i--) { 5019 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5020 5021 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5022 chains = max_t(u8, chains, i + 1); 5023 break; 5024 } 5025 } 5026 5027 return chains; 5028 } 5029 5030 static bool 5031 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5032 const struct cfg80211_bss_ies *ies, 5033 const struct ieee80211_he_operation *he_op) 5034 { 5035 const struct element *he_cap_elem; 5036 const struct ieee80211_he_cap_elem *he_cap; 5037 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5038 u16 mcs_80_map_tx, mcs_80_map_rx; 5039 u16 ap_min_req_set; 5040 int mcs_nss_size; 5041 int nss; 5042 5043 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5044 ies->data, ies->len); 5045 5046 /* invalid HE IE */ 5047 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 5048 sdata_info(sdata, 5049 "Invalid HE elem, Disable HE\n"); 5050 return false; 5051 } 5052 5053 /* skip one byte ext_tag_id */ 5054 he_cap = (void *)(he_cap_elem->data + 1); 5055 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5056 5057 /* invalid HE IE */ 5058 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 5059 sdata_info(sdata, 5060 "Invalid HE elem with nss size, Disable HE\n"); 5061 return false; 5062 } 5063 5064 /* mcs_nss is right after he_cap info */ 5065 he_mcs_nss_supp = (void *)(he_cap + 1); 5066 5067 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5068 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 5069 5070 /* P802.11-REVme/D0.3 5071 * 27.1.1 Introduction to the HE PHY 5072 * ... 5073 * An HE STA shall support the following features: 5074 * ... 5075 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 5076 * supported channel widths for HE SU PPDUs 5077 */ 5078 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 5079 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 5080 sdata_info(sdata, 5081 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 5082 mcs_80_map_tx, mcs_80_map_rx); 5083 return false; 5084 } 5085 5086 if (!he_op) 5087 return true; 5088 5089 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5090 5091 /* make sure the AP is consistent with itself 5092 * 5093 * P802.11-REVme/D0.3 5094 * 26.17.1 Basic HE BSS operation 5095 * 5096 * A STA that is operating in an HE BSS shall be able to receive and 5097 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 5098 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 5099 * MLME-START.request primitive and shall be able to receive at each of 5100 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 5101 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 5102 * primitive 5103 */ 5104 for (nss = 8; nss > 0; nss--) { 5105 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5106 u8 ap_rx_val; 5107 u8 ap_tx_val; 5108 5109 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5110 continue; 5111 5112 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 5113 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 5114 5115 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5116 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5117 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 5118 sdata_info(sdata, 5119 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 5120 nss, ap_rx_val, ap_rx_val, ap_op_val); 5121 return false; 5122 } 5123 } 5124 5125 return true; 5126 } 5127 5128 static bool 5129 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5130 struct ieee80211_supported_band *sband, 5131 const struct ieee80211_he_operation *he_op) 5132 { 5133 const struct ieee80211_sta_he_cap *sta_he_cap = 5134 ieee80211_get_he_iftype_cap(sband, 5135 ieee80211_vif_type_p2p(&sdata->vif)); 5136 u16 ap_min_req_set; 5137 int i; 5138 5139 if (!sta_he_cap || !he_op) 5140 return false; 5141 5142 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5143 5144 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 5145 for (i = 0; i < 3; i++) { 5146 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 5147 &sta_he_cap->he_mcs_nss_supp; 5148 u16 sta_mcs_map_rx = 5149 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 5150 u16 sta_mcs_map_tx = 5151 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 5152 u8 nss; 5153 bool verified = true; 5154 5155 /* 5156 * For each band there is a maximum of 8 spatial streams 5157 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 5158 * of 2 bits per NSS (1-8), with the values defined in enum 5159 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 5160 * capabilities aren't less than the AP's minimum requirements 5161 * for this HE BSS per SS. 5162 * It is enough to find one such band that meets the reqs. 5163 */ 5164 for (nss = 8; nss > 0; nss--) { 5165 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 5166 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 5167 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5168 5169 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5170 continue; 5171 5172 /* 5173 * Make sure the HE AP doesn't require MCSs that aren't 5174 * supported by the client as required by spec 5175 * 5176 * P802.11-REVme/D0.3 5177 * 26.17.1 Basic HE BSS operation 5178 * 5179 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 5180 * a BSS, unless it supports (i.e., is able to both transmit and 5181 * receive using) all of the <HE-MCS, NSS> tuples in the basic 5182 * HE-MCS and NSS set. 5183 */ 5184 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5185 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5186 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 5187 verified = false; 5188 break; 5189 } 5190 } 5191 5192 if (verified) 5193 return true; 5194 } 5195 5196 /* If here, STA doesn't meet AP's HE min requirements */ 5197 return false; 5198 } 5199 5200 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5201 struct cfg80211_bss *cbss) 5202 { 5203 struct ieee80211_local *local = sdata->local; 5204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5205 const struct ieee80211_ht_cap *ht_cap = NULL; 5206 const struct ieee80211_ht_operation *ht_oper = NULL; 5207 const struct ieee80211_vht_operation *vht_oper = NULL; 5208 const struct ieee80211_he_operation *he_oper = NULL; 5209 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5210 struct ieee80211_supported_band *sband; 5211 struct cfg80211_chan_def chandef; 5212 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5213 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5214 struct ieee80211_bss *bss = (void *)cbss->priv; 5215 struct ieee802_11_elems *elems; 5216 const struct cfg80211_bss_ies *ies; 5217 int ret; 5218 u32 i; 5219 bool have_80mhz; 5220 5221 rcu_read_lock(); 5222 5223 ies = rcu_dereference(cbss->ies); 5224 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5225 NULL, NULL); 5226 if (!elems) { 5227 rcu_read_unlock(); 5228 return -ENOMEM; 5229 } 5230 5231 sband = local->hw.wiphy->bands[cbss->channel->band]; 5232 5233 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5234 IEEE80211_STA_DISABLE_80P80MHZ | 5235 IEEE80211_STA_DISABLE_160MHZ); 5236 5237 /* disable HT/VHT/HE if we don't support them */ 5238 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5239 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE\n"); 5240 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5241 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5242 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5243 } 5244 5245 if (!sband->vht_cap.vht_supported && is_5ghz) { 5246 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE\n"); 5247 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5248 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5249 } 5250 5251 if (!ieee80211_get_he_iftype_cap(sband, 5252 ieee80211_vif_type_p2p(&sdata->vif))) { 5253 mlme_dbg(sdata, "HE not supported, disabling it\n"); 5254 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5255 } 5256 5257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5258 ht_oper = elems->ht_operation; 5259 ht_cap = elems->ht_cap_elem; 5260 5261 if (!ht_cap) { 5262 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5263 ht_oper = NULL; 5264 } 5265 } 5266 5267 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5268 vht_oper = elems->vht_operation; 5269 if (vht_oper && !ht_oper) { 5270 vht_oper = NULL; 5271 sdata_info(sdata, 5272 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5273 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5274 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5275 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5276 } 5277 5278 if (!elems->vht_cap_elem) { 5279 sdata_info(sdata, 5280 "bad VHT capabilities, disabling VHT\n"); 5281 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5282 vht_oper = NULL; 5283 } 5284 } 5285 5286 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5287 he_oper = elems->he_operation; 5288 5289 if (is_6ghz) { 5290 struct ieee80211_bss_conf *bss_conf; 5291 u8 i, j = 0; 5292 5293 bss_conf = &sdata->vif.bss_conf; 5294 5295 if (elems->pwr_constr_elem) 5296 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5297 5298 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5299 ARRAY_SIZE(elems->tx_pwr_env)); 5300 5301 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5302 if (elems->tx_pwr_env_len[i] > 5303 sizeof(bss_conf->tx_pwr_env[j])) 5304 continue; 5305 5306 bss_conf->tx_pwr_env_num++; 5307 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5308 elems->tx_pwr_env_len[i]); 5309 j++; 5310 } 5311 } 5312 5313 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 5314 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5315 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5316 } 5317 5318 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5319 have_80mhz = false; 5320 for (i = 0; i < sband->n_channels; i++) { 5321 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5322 IEEE80211_CHAN_NO_80MHZ)) 5323 continue; 5324 5325 have_80mhz = true; 5326 break; 5327 } 5328 5329 if (!have_80mhz) { 5330 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5331 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5332 } 5333 5334 if (sband->band == NL80211_BAND_S1GHZ) { 5335 s1g_oper = elems->s1g_oper; 5336 if (!s1g_oper) 5337 sdata_info(sdata, 5338 "AP missing S1G operation element?\n"); 5339 } 5340 5341 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5342 cbss->channel, 5343 bss->vht_cap_info, 5344 ht_oper, vht_oper, he_oper, 5345 s1g_oper, 5346 &chandef, false); 5347 5348 sdata->needed_rx_chains = min(ieee80211_max_rx_chains(sdata, cbss), 5349 local->rx_chains); 5350 5351 rcu_read_unlock(); 5352 /* the element data was RCU protected so no longer valid anyway */ 5353 kfree(elems); 5354 elems = NULL; 5355 5356 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5357 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5358 return -EINVAL; 5359 } 5360 5361 /* will change later if needed */ 5362 sdata->smps_mode = IEEE80211_SMPS_OFF; 5363 5364 mutex_lock(&local->mtx); 5365 /* 5366 * If this fails (possibly due to channel context sharing 5367 * on incompatible channels, e.g. 80+80 and 160 sharing the 5368 * same control channel) try to use a smaller bandwidth. 5369 */ 5370 ret = ieee80211_vif_use_channel(sdata, &chandef, 5371 IEEE80211_CHANCTX_SHARED); 5372 5373 /* don't downgrade for 5 and 10 MHz channels, though. */ 5374 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5375 chandef.width == NL80211_CHAN_WIDTH_10) 5376 goto out; 5377 5378 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5379 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5380 ret = ieee80211_vif_use_channel(sdata, &chandef, 5381 IEEE80211_CHANCTX_SHARED); 5382 } 5383 out: 5384 mutex_unlock(&local->mtx); 5385 return ret; 5386 } 5387 5388 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5389 u8 *dtim_count, u8 *dtim_period) 5390 { 5391 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5392 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5393 ies->len); 5394 const struct ieee80211_tim_ie *tim = NULL; 5395 const struct ieee80211_bssid_index *idx; 5396 bool valid = tim_ie && tim_ie[1] >= 2; 5397 5398 if (valid) 5399 tim = (void *)(tim_ie + 2); 5400 5401 if (dtim_count) 5402 *dtim_count = valid ? tim->dtim_count : 0; 5403 5404 if (dtim_period) 5405 *dtim_period = valid ? tim->dtim_period : 0; 5406 5407 /* Check if value is overridden by non-transmitted profile */ 5408 if (!idx_ie || idx_ie[1] < 3) 5409 return valid; 5410 5411 idx = (void *)(idx_ie + 2); 5412 5413 if (dtim_count) 5414 *dtim_count = idx->dtim_count; 5415 5416 if (dtim_period) 5417 *dtim_period = idx->dtim_period; 5418 5419 return true; 5420 } 5421 5422 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5423 struct cfg80211_bss *cbss, bool assoc, 5424 bool override) 5425 { 5426 struct ieee80211_local *local = sdata->local; 5427 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5428 struct ieee80211_bss *bss = (void *)cbss->priv; 5429 struct sta_info *new_sta = NULL; 5430 struct ieee80211_supported_band *sband; 5431 bool have_sta = false; 5432 int err; 5433 5434 sband = local->hw.wiphy->bands[cbss->channel->band]; 5435 5436 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5437 return -EINVAL; 5438 5439 /* If a reconfig is happening, bail out */ 5440 if (local->in_reconfig) 5441 return -EBUSY; 5442 5443 if (assoc) { 5444 rcu_read_lock(); 5445 have_sta = sta_info_get(sdata, cbss->bssid); 5446 rcu_read_unlock(); 5447 } 5448 5449 if (!have_sta) { 5450 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5451 if (!new_sta) 5452 return -ENOMEM; 5453 } 5454 5455 /* 5456 * Set up the information for the new channel before setting the 5457 * new channel. We can't - completely race-free - change the basic 5458 * rates bitmap and the channel (sband) that it refers to, but if 5459 * we set it up before we at least avoid calling into the driver's 5460 * bss_info_changed() method with invalid information (since we do 5461 * call that from changing the channel - only for IDLE and perhaps 5462 * some others, but ...). 5463 * 5464 * So to avoid that, just set up all the new information before the 5465 * channel, but tell the driver to apply it only afterwards, since 5466 * it might need the new channel for that. 5467 */ 5468 if (new_sta) { 5469 u32 rates = 0, basic_rates = 0; 5470 bool have_higher_than_11mbit = false; 5471 int min_rate = INT_MAX, min_rate_index = -1; 5472 const struct cfg80211_bss_ies *ies; 5473 int shift = ieee80211_vif_get_shift(&sdata->vif); 5474 5475 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5476 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5477 ieee80211_s1g_sta_rate_init(new_sta); 5478 goto skip_rates; 5479 } 5480 5481 ieee80211_get_rates(sband, bss->supp_rates, 5482 bss->supp_rates_len, 5483 &rates, &basic_rates, 5484 &have_higher_than_11mbit, 5485 &min_rate, &min_rate_index, 5486 shift); 5487 5488 /* 5489 * This used to be a workaround for basic rates missing 5490 * in the association response frame. Now that we no 5491 * longer use the basic rates from there, it probably 5492 * doesn't happen any more, but keep the workaround so 5493 * in case some *other* APs are buggy in different ways 5494 * we can connect -- with a warning. 5495 * Allow this workaround only in case the AP provided at least 5496 * one rate. 5497 */ 5498 if (min_rate_index < 0) { 5499 sdata_info(sdata, 5500 "No legacy rates in association response\n"); 5501 5502 sta_info_free(local, new_sta); 5503 return -EINVAL; 5504 } else if (!basic_rates) { 5505 sdata_info(sdata, 5506 "No basic rates, using min rate instead\n"); 5507 basic_rates = BIT(min_rate_index); 5508 } 5509 5510 if (rates) 5511 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5512 else 5513 sdata_info(sdata, 5514 "No rates found, keeping mandatory only\n"); 5515 5516 sdata->vif.bss_conf.basic_rates = basic_rates; 5517 5518 /* cf. IEEE 802.11 9.2.12 */ 5519 if (cbss->channel->band == NL80211_BAND_2GHZ && 5520 have_higher_than_11mbit) 5521 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5522 else 5523 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5524 5525 skip_rates: 5526 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5527 5528 /* set timing information */ 5529 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5530 rcu_read_lock(); 5531 ies = rcu_dereference(cbss->beacon_ies); 5532 if (ies) { 5533 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5534 sdata->vif.bss_conf.sync_device_ts = 5535 bss->device_ts_beacon; 5536 5537 ieee80211_get_dtim(ies, 5538 &sdata->vif.bss_conf.sync_dtim_count, 5539 NULL); 5540 } else if (!ieee80211_hw_check(&sdata->local->hw, 5541 TIMING_BEACON_ONLY)) { 5542 ies = rcu_dereference(cbss->proberesp_ies); 5543 /* must be non-NULL since beacon IEs were NULL */ 5544 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5545 sdata->vif.bss_conf.sync_device_ts = 5546 bss->device_ts_presp; 5547 sdata->vif.bss_conf.sync_dtim_count = 0; 5548 } else { 5549 sdata->vif.bss_conf.sync_tsf = 0; 5550 sdata->vif.bss_conf.sync_device_ts = 0; 5551 sdata->vif.bss_conf.sync_dtim_count = 0; 5552 } 5553 rcu_read_unlock(); 5554 } 5555 5556 if (new_sta || override) { 5557 err = ieee80211_prep_channel(sdata, cbss); 5558 if (err) { 5559 if (new_sta) 5560 sta_info_free(local, new_sta); 5561 return -EINVAL; 5562 } 5563 } 5564 5565 if (new_sta) { 5566 /* 5567 * tell driver about BSSID, basic rates and timing 5568 * this was set up above, before setting the channel 5569 */ 5570 ieee80211_bss_info_change_notify(sdata, 5571 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5572 BSS_CHANGED_BEACON_INT); 5573 5574 if (assoc) 5575 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5576 5577 err = sta_info_insert(new_sta); 5578 new_sta = NULL; 5579 if (err) { 5580 sdata_info(sdata, 5581 "failed to insert STA entry for the AP (error %d)\n", 5582 err); 5583 return err; 5584 } 5585 } else 5586 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5587 5588 /* Cancel scan to ensure that nothing interferes with connection */ 5589 if (local->scanning) 5590 ieee80211_scan_cancel(local); 5591 5592 return 0; 5593 } 5594 5595 /* config hooks */ 5596 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5597 struct cfg80211_auth_request *req) 5598 { 5599 struct ieee80211_local *local = sdata->local; 5600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5601 struct ieee80211_mgd_auth_data *auth_data; 5602 u16 auth_alg; 5603 int err; 5604 bool cont_auth; 5605 5606 /* prepare auth data structure */ 5607 5608 switch (req->auth_type) { 5609 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5610 auth_alg = WLAN_AUTH_OPEN; 5611 break; 5612 case NL80211_AUTHTYPE_SHARED_KEY: 5613 if (fips_enabled) 5614 return -EOPNOTSUPP; 5615 auth_alg = WLAN_AUTH_SHARED_KEY; 5616 break; 5617 case NL80211_AUTHTYPE_FT: 5618 auth_alg = WLAN_AUTH_FT; 5619 break; 5620 case NL80211_AUTHTYPE_NETWORK_EAP: 5621 auth_alg = WLAN_AUTH_LEAP; 5622 break; 5623 case NL80211_AUTHTYPE_SAE: 5624 auth_alg = WLAN_AUTH_SAE; 5625 break; 5626 case NL80211_AUTHTYPE_FILS_SK: 5627 auth_alg = WLAN_AUTH_FILS_SK; 5628 break; 5629 case NL80211_AUTHTYPE_FILS_SK_PFS: 5630 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5631 break; 5632 case NL80211_AUTHTYPE_FILS_PK: 5633 auth_alg = WLAN_AUTH_FILS_PK; 5634 break; 5635 default: 5636 return -EOPNOTSUPP; 5637 } 5638 5639 if (ifmgd->assoc_data) 5640 return -EBUSY; 5641 5642 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5643 req->ie_len, GFP_KERNEL); 5644 if (!auth_data) 5645 return -ENOMEM; 5646 5647 auth_data->bss = req->bss; 5648 5649 if (req->auth_data_len >= 4) { 5650 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5651 __le16 *pos = (__le16 *) req->auth_data; 5652 5653 auth_data->sae_trans = le16_to_cpu(pos[0]); 5654 auth_data->sae_status = le16_to_cpu(pos[1]); 5655 } 5656 memcpy(auth_data->data, req->auth_data + 4, 5657 req->auth_data_len - 4); 5658 auth_data->data_len += req->auth_data_len - 4; 5659 } 5660 5661 /* Check if continuing authentication or trying to authenticate with the 5662 * same BSS that we were in the process of authenticating with and avoid 5663 * removal and re-addition of the STA entry in 5664 * ieee80211_prep_connection(). 5665 */ 5666 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5667 5668 if (req->ie && req->ie_len) { 5669 memcpy(&auth_data->data[auth_data->data_len], 5670 req->ie, req->ie_len); 5671 auth_data->data_len += req->ie_len; 5672 } 5673 5674 if (req->key && req->key_len) { 5675 auth_data->key_len = req->key_len; 5676 auth_data->key_idx = req->key_idx; 5677 memcpy(auth_data->key, req->key, req->key_len); 5678 } 5679 5680 auth_data->algorithm = auth_alg; 5681 5682 /* try to authenticate/probe */ 5683 5684 if (ifmgd->auth_data) { 5685 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5686 auth_data->peer_confirmed = 5687 ifmgd->auth_data->peer_confirmed; 5688 } 5689 ieee80211_destroy_auth_data(sdata, cont_auth); 5690 } 5691 5692 /* prep auth_data so we don't go into idle on disassoc */ 5693 ifmgd->auth_data = auth_data; 5694 5695 /* If this is continuation of an ongoing SAE authentication exchange 5696 * (i.e., request to send SAE Confirm) and the peer has already 5697 * confirmed, mark authentication completed since we are about to send 5698 * out SAE Confirm. 5699 */ 5700 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5701 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5702 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5703 5704 if (ifmgd->associated) { 5705 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5706 5707 sdata_info(sdata, 5708 "disconnect from AP %pM for new auth to %pM\n", 5709 ifmgd->associated->bssid, req->bss->bssid); 5710 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5711 WLAN_REASON_UNSPECIFIED, 5712 false, frame_buf); 5713 5714 ieee80211_report_disconnect(sdata, frame_buf, 5715 sizeof(frame_buf), true, 5716 WLAN_REASON_UNSPECIFIED, 5717 false); 5718 } 5719 5720 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5721 5722 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5723 if (err) 5724 goto err_clear; 5725 5726 err = ieee80211_auth(sdata); 5727 if (err) { 5728 sta_info_destroy_addr(sdata, req->bss->bssid); 5729 goto err_clear; 5730 } 5731 5732 /* hold our own reference */ 5733 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5734 return 0; 5735 5736 err_clear: 5737 eth_zero_addr(ifmgd->bssid); 5738 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5739 ifmgd->auth_data = NULL; 5740 mutex_lock(&sdata->local->mtx); 5741 ieee80211_vif_release_channel(sdata); 5742 mutex_unlock(&sdata->local->mtx); 5743 kfree(auth_data); 5744 return err; 5745 } 5746 5747 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5748 struct cfg80211_assoc_request *req) 5749 { 5750 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5751 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5752 struct ieee80211_local *local = sdata->local; 5753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5754 struct ieee80211_bss *bss = (void *)req->bss->priv; 5755 struct ieee80211_mgd_assoc_data *assoc_data; 5756 const struct cfg80211_bss_ies *beacon_ies; 5757 struct ieee80211_supported_band *sband; 5758 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5759 const struct element *ssid_elem, *ht_elem, *vht_elem; 5760 int i, err; 5761 bool override = false; 5762 5763 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5764 if (!assoc_data) 5765 return -ENOMEM; 5766 5767 rcu_read_lock(); 5768 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5769 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5770 rcu_read_unlock(); 5771 kfree(assoc_data); 5772 return -EINVAL; 5773 } 5774 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5775 assoc_data->ssid_len = ssid_elem->datalen; 5776 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5777 bss_conf->ssid_len = assoc_data->ssid_len; 5778 rcu_read_unlock(); 5779 5780 if (ifmgd->associated) { 5781 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5782 5783 sdata_info(sdata, 5784 "disconnect from AP %pM for new assoc to %pM\n", 5785 ifmgd->associated->bssid, req->bss->bssid); 5786 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5787 WLAN_REASON_UNSPECIFIED, 5788 false, frame_buf); 5789 5790 ieee80211_report_disconnect(sdata, frame_buf, 5791 sizeof(frame_buf), true, 5792 WLAN_REASON_UNSPECIFIED, 5793 false); 5794 } 5795 5796 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5797 err = -EBUSY; 5798 goto err_free; 5799 } 5800 5801 if (ifmgd->assoc_data) { 5802 err = -EBUSY; 5803 goto err_free; 5804 } 5805 5806 if (ifmgd->auth_data) { 5807 bool match; 5808 5809 /* keep sta info, bssid if matching */ 5810 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5811 ieee80211_destroy_auth_data(sdata, match); 5812 } 5813 5814 /* prepare assoc data */ 5815 5816 ifmgd->beacon_crc_valid = false; 5817 5818 assoc_data->wmm = bss->wmm_used && 5819 (local->hw.queues >= IEEE80211_NUM_ACS); 5820 5821 /* 5822 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5823 * We still associate in non-HT mode (11a/b/g) if any one of these 5824 * ciphers is configured as pairwise. 5825 * We can set this to true for non-11n hardware, that'll be checked 5826 * separately along with the peer capabilities. 5827 */ 5828 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5829 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5830 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5831 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5832 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5833 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5834 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5835 netdev_info(sdata->dev, 5836 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5837 } 5838 } 5839 5840 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5841 5842 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5843 if (!bss->wmm_used) { 5844 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5845 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5846 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5847 netdev_info(sdata->dev, 5848 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5849 } 5850 5851 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5852 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5853 sizeof(ifmgd->ht_capa_mask)); 5854 5855 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5856 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5857 sizeof(ifmgd->vht_capa_mask)); 5858 5859 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5860 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5861 sizeof(ifmgd->s1g_capa_mask)); 5862 5863 if (req->ie && req->ie_len) { 5864 memcpy(assoc_data->ie, req->ie, req->ie_len); 5865 assoc_data->ie_len = req->ie_len; 5866 } 5867 5868 if (req->fils_kek) { 5869 /* should already be checked in cfg80211 - so warn */ 5870 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5871 err = -EINVAL; 5872 goto err_free; 5873 } 5874 memcpy(assoc_data->fils_kek, req->fils_kek, 5875 req->fils_kek_len); 5876 assoc_data->fils_kek_len = req->fils_kek_len; 5877 } 5878 5879 if (req->fils_nonces) 5880 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5881 2 * FILS_NONCE_LEN); 5882 5883 assoc_data->bss = req->bss; 5884 assoc_data->capability = req->bss->capability; 5885 assoc_data->supp_rates = bss->supp_rates; 5886 assoc_data->supp_rates_len = bss->supp_rates_len; 5887 5888 rcu_read_lock(); 5889 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 5890 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 5891 assoc_data->ap_ht_param = 5892 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 5893 else if (!is_6ghz) 5894 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5895 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 5896 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 5897 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 5898 sizeof(struct ieee80211_vht_cap)); 5899 } else if (is_5ghz) { 5900 sdata_info(sdata, "VHT capa missing/short, disabling VHT/HE\n"); 5901 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5902 IEEE80211_STA_DISABLE_HE; 5903 } 5904 rcu_read_unlock(); 5905 5906 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5907 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5908 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5909 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5910 5911 if (bss->wmm_used && bss->uapsd_supported && 5912 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5913 assoc_data->uapsd = true; 5914 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5915 } else { 5916 assoc_data->uapsd = false; 5917 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5918 } 5919 5920 if (req->prev_bssid) 5921 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5922 5923 if (req->use_mfp) { 5924 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5925 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5926 } else { 5927 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5928 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5929 } 5930 5931 if (req->flags & ASSOC_REQ_USE_RRM) 5932 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5933 else 5934 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5935 5936 if (req->crypto.control_port) 5937 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5938 else 5939 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5940 5941 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5942 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5943 sdata->control_port_over_nl80211 = 5944 req->crypto.control_port_over_nl80211; 5945 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5946 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5947 sdata->vif.type); 5948 5949 /* kick off associate process */ 5950 5951 ifmgd->assoc_data = assoc_data; 5952 ifmgd->dtim_period = 0; 5953 ifmgd->have_beacon = false; 5954 5955 /* override HT/VHT configuration only if the AP and we support it */ 5956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5957 struct ieee80211_sta_ht_cap sta_ht_cap; 5958 5959 if (req->flags & ASSOC_REQ_DISABLE_HT) 5960 override = true; 5961 5962 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5963 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5964 5965 /* check for 40 MHz disable override */ 5966 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5967 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5968 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5969 override = true; 5970 5971 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5972 req->flags & ASSOC_REQ_DISABLE_VHT) 5973 override = true; 5974 } 5975 5976 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5977 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 5978 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5979 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5980 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5981 } 5982 5983 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 5984 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 5985 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5986 } 5987 5988 if (req->flags & ASSOC_REQ_DISABLE_HE) { 5989 mlme_dbg(sdata, "HE disabled by flag, disabling VHT\n"); 5990 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5991 } 5992 5993 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5994 if (err) 5995 goto err_clear; 5996 5997 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5998 if (ifmgd->powersave) 5999 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 6000 else 6001 sdata->smps_mode = IEEE80211_SMPS_OFF; 6002 } else { 6003 sdata->smps_mode = ifmgd->req_smps; 6004 } 6005 6006 rcu_read_lock(); 6007 beacon_ies = rcu_dereference(req->bss->beacon_ies); 6008 6009 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 6010 !beacon_ies) { 6011 /* 6012 * Wait up to one beacon interval ... 6013 * should this be more if we miss one? 6014 */ 6015 sdata_info(sdata, "waiting for beacon from %pM\n", 6016 ifmgd->bssid); 6017 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 6018 assoc_data->timeout_started = true; 6019 assoc_data->need_beacon = true; 6020 } else if (beacon_ies) { 6021 const struct element *elem; 6022 u8 dtim_count = 0; 6023 6024 ieee80211_get_dtim(beacon_ies, &dtim_count, 6025 &ifmgd->dtim_period); 6026 6027 ifmgd->have_beacon = true; 6028 assoc_data->timeout = jiffies; 6029 assoc_data->timeout_started = true; 6030 6031 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6032 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 6033 sdata->vif.bss_conf.sync_device_ts = 6034 bss->device_ts_beacon; 6035 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 6036 } 6037 6038 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6039 beacon_ies->data, beacon_ies->len); 6040 if (elem && elem->datalen >= 3) 6041 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 6042 else 6043 sdata->vif.bss_conf.profile_periodicity = 0; 6044 6045 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6046 beacon_ies->data, beacon_ies->len); 6047 if (elem && elem->datalen >= 11 && 6048 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6049 sdata->vif.bss_conf.ema_ap = true; 6050 else 6051 sdata->vif.bss_conf.ema_ap = false; 6052 } else { 6053 assoc_data->timeout = jiffies; 6054 assoc_data->timeout_started = true; 6055 } 6056 rcu_read_unlock(); 6057 6058 run_again(sdata, assoc_data->timeout); 6059 6060 if (bss->corrupt_data) { 6061 char *corrupt_type = "data"; 6062 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6063 if (bss->corrupt_data & 6064 IEEE80211_BSS_CORRUPT_PROBE_RESP) 6065 corrupt_type = "beacon and probe response"; 6066 else 6067 corrupt_type = "beacon"; 6068 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6069 corrupt_type = "probe response"; 6070 sdata_info(sdata, "associating with AP with corrupt %s\n", 6071 corrupt_type); 6072 } 6073 6074 return 0; 6075 err_clear: 6076 eth_zero_addr(ifmgd->bssid); 6077 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 6078 ifmgd->assoc_data = NULL; 6079 err_free: 6080 kfree(assoc_data); 6081 return err; 6082 } 6083 6084 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 6085 struct cfg80211_deauth_request *req) 6086 { 6087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6088 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6089 bool tx = !req->local_state_change; 6090 struct ieee80211_prep_tx_info info = { 6091 .subtype = IEEE80211_STYPE_DEAUTH, 6092 }; 6093 6094 if (ifmgd->auth_data && 6095 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 6096 sdata_info(sdata, 6097 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 6098 req->bssid, req->reason_code, 6099 ieee80211_get_reason_code_string(req->reason_code)); 6100 6101 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6102 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6103 IEEE80211_STYPE_DEAUTH, 6104 req->reason_code, tx, 6105 frame_buf); 6106 ieee80211_destroy_auth_data(sdata, false); 6107 ieee80211_report_disconnect(sdata, frame_buf, 6108 sizeof(frame_buf), true, 6109 req->reason_code, false); 6110 drv_mgd_complete_tx(sdata->local, sdata, &info); 6111 return 0; 6112 } 6113 6114 if (ifmgd->assoc_data && 6115 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 6116 sdata_info(sdata, 6117 "aborting association with %pM by local choice (Reason: %u=%s)\n", 6118 req->bssid, req->reason_code, 6119 ieee80211_get_reason_code_string(req->reason_code)); 6120 6121 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6122 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6123 IEEE80211_STYPE_DEAUTH, 6124 req->reason_code, tx, 6125 frame_buf); 6126 ieee80211_destroy_assoc_data(sdata, false, true); 6127 ieee80211_report_disconnect(sdata, frame_buf, 6128 sizeof(frame_buf), true, 6129 req->reason_code, false); 6130 return 0; 6131 } 6132 6133 if (ifmgd->associated && 6134 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 6135 sdata_info(sdata, 6136 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 6137 req->bssid, req->reason_code, 6138 ieee80211_get_reason_code_string(req->reason_code)); 6139 6140 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6141 req->reason_code, tx, frame_buf); 6142 ieee80211_report_disconnect(sdata, frame_buf, 6143 sizeof(frame_buf), true, 6144 req->reason_code, false); 6145 drv_mgd_complete_tx(sdata->local, sdata, &info); 6146 return 0; 6147 } 6148 6149 return -ENOTCONN; 6150 } 6151 6152 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 6153 struct cfg80211_disassoc_request *req) 6154 { 6155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6156 u8 bssid[ETH_ALEN]; 6157 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6158 6159 /* 6160 * cfg80211 should catch this ... but it's racy since 6161 * we can receive a disassoc frame, process it, hand it 6162 * to cfg80211 while that's in a locked section already 6163 * trying to tell us that the user wants to disconnect. 6164 */ 6165 if (ifmgd->associated != req->bss) 6166 return -ENOLINK; 6167 6168 sdata_info(sdata, 6169 "disassociating from %pM by local choice (Reason: %u=%s)\n", 6170 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 6171 6172 memcpy(bssid, req->bss->bssid, ETH_ALEN); 6173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 6174 req->reason_code, !req->local_state_change, 6175 frame_buf); 6176 6177 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6178 req->reason_code, false); 6179 6180 return 0; 6181 } 6182 6183 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 6184 { 6185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6186 6187 /* 6188 * Make sure some work items will not run after this, 6189 * they will not do anything but might not have been 6190 * cancelled when disconnecting. 6191 */ 6192 cancel_work_sync(&ifmgd->monitor_work); 6193 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 6194 cancel_work_sync(&ifmgd->request_smps_work); 6195 cancel_work_sync(&ifmgd->csa_connection_drop_work); 6196 cancel_work_sync(&ifmgd->chswitch_work); 6197 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 6198 6199 sdata_lock(sdata); 6200 if (ifmgd->assoc_data) { 6201 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 6202 ieee80211_destroy_assoc_data(sdata, false, false); 6203 cfg80211_assoc_timeout(sdata->dev, bss); 6204 } 6205 if (ifmgd->auth_data) 6206 ieee80211_destroy_auth_data(sdata, false); 6207 spin_lock_bh(&ifmgd->teardown_lock); 6208 if (ifmgd->teardown_skb) { 6209 kfree_skb(ifmgd->teardown_skb); 6210 ifmgd->teardown_skb = NULL; 6211 ifmgd->orig_teardown_skb = NULL; 6212 } 6213 kfree(ifmgd->assoc_req_ies); 6214 ifmgd->assoc_req_ies = NULL; 6215 ifmgd->assoc_req_ies_len = 0; 6216 spin_unlock_bh(&ifmgd->teardown_lock); 6217 del_timer_sync(&ifmgd->timer); 6218 sdata_unlock(sdata); 6219 } 6220 6221 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6222 enum nl80211_cqm_rssi_threshold_event rssi_event, 6223 s32 rssi_level, 6224 gfp_t gfp) 6225 { 6226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6227 6228 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6229 6230 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6231 } 6232 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6233 6234 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6235 { 6236 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6237 6238 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6239 6240 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6241 } 6242 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6243