1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2021 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 const struct ieee80211_s1g_oper_ie *s1g_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->freq1_offset = channel->freq_offset; 165 166 if (channel->band == NL80211_BAND_6GHZ) { 167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) { 168 mlme_dbg(sdata, 169 "bad 6 GHz operation, disabling HT/VHT/HE\n"); 170 ret = IEEE80211_STA_DISABLE_HT | 171 IEEE80211_STA_DISABLE_VHT | 172 IEEE80211_STA_DISABLE_HE; 173 } else { 174 ret = 0; 175 } 176 vht_chandef = *chandef; 177 goto out; 178 } else if (sband->band == NL80211_BAND_S1GHZ) { 179 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 180 sdata_info(sdata, 181 "Missing S1G Operation Element? Trying operating == primary\n"); 182 chandef->width = ieee80211_s1g_channel_width(channel); 183 } 184 185 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 186 IEEE80211_STA_DISABLE_VHT | 187 IEEE80211_STA_DISABLE_80P80MHZ | 188 IEEE80211_STA_DISABLE_160MHZ; 189 goto out; 190 } 191 192 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 193 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 194 195 if (!ht_oper || !sta_ht_cap.ht_supported) { 196 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 197 ret = IEEE80211_STA_DISABLE_HT | 198 IEEE80211_STA_DISABLE_VHT | 199 IEEE80211_STA_DISABLE_HE; 200 goto out; 201 } 202 203 chandef->width = NL80211_CHAN_WIDTH_20; 204 205 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 206 channel->band); 207 /* check that channel matches the right operating channel */ 208 if (!tracking && channel->center_freq != ht_cfreq) { 209 /* 210 * It's possible that some APs are confused here; 211 * Netgear WNDR3700 sometimes reports 4 higher than 212 * the actual channel in association responses, but 213 * since we look at probe response/beacon data here 214 * it should be OK. 215 */ 216 sdata_info(sdata, 217 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 218 channel->center_freq, ht_cfreq, 219 ht_oper->primary_chan, channel->band); 220 ret = IEEE80211_STA_DISABLE_HT | 221 IEEE80211_STA_DISABLE_VHT | 222 IEEE80211_STA_DISABLE_HE; 223 goto out; 224 } 225 226 /* check 40 MHz support, if we have it */ 227 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 228 ieee80211_chandef_ht_oper(ht_oper, chandef); 229 } else { 230 mlme_dbg(sdata, "40 MHz not supported\n"); 231 /* 40 MHz (and 80 MHz) must be supported for VHT */ 232 ret = IEEE80211_STA_DISABLE_VHT; 233 /* also mark 40 MHz disabled */ 234 ret |= IEEE80211_STA_DISABLE_40MHZ; 235 goto out; 236 } 237 238 if (!vht_oper || !sband->vht_cap.vht_supported) { 239 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 240 ret = IEEE80211_STA_DISABLE_VHT; 241 goto out; 242 } 243 244 vht_chandef = *chandef; 245 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 246 (le32_to_cpu(he_oper->he_oper_params) & 247 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 248 struct ieee80211_vht_operation he_oper_vht_cap; 249 250 /* 251 * Set only first 3 bytes (other 2 aren't used in 252 * ieee80211_chandef_vht_oper() anyway) 253 */ 254 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 255 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 256 257 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 258 &he_oper_vht_cap, ht_oper, 259 &vht_chandef)) { 260 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 261 sdata_info(sdata, 262 "HE AP VHT information is invalid, disabling HE\n"); 263 ret = IEEE80211_STA_DISABLE_HE; 264 goto out; 265 } 266 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 267 vht_cap_info, 268 vht_oper, ht_oper, 269 &vht_chandef)) { 270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 271 sdata_info(sdata, 272 "AP VHT information is invalid, disabling VHT\n"); 273 ret = IEEE80211_STA_DISABLE_VHT; 274 goto out; 275 } 276 277 if (!cfg80211_chandef_valid(&vht_chandef)) { 278 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 279 sdata_info(sdata, 280 "AP VHT information is invalid, disabling VHT\n"); 281 ret = IEEE80211_STA_DISABLE_VHT; 282 goto out; 283 } 284 285 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 286 ret = 0; 287 goto out; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 292 sdata_info(sdata, 293 "AP VHT information doesn't match HT, disabling VHT\n"); 294 ret = IEEE80211_STA_DISABLE_VHT; 295 goto out; 296 } 297 298 *chandef = vht_chandef; 299 300 ret = 0; 301 302 out: 303 /* 304 * When tracking the current AP, don't do any further checks if the 305 * new chandef is identical to the one we're currently using for the 306 * connection. This keeps us from playing ping-pong with regulatory, 307 * without it the following can happen (for example): 308 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 309 * - AP advertises regdom US 310 * - CRDA loads regdom US with 80 MHz prohibited (old database) 311 * - the code below detects an unsupported channel, downgrades, and 312 * we disconnect from the AP in the caller 313 * - disconnect causes CRDA to reload world regdomain and the game 314 * starts anew. 315 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 316 * 317 * It seems possible that there are still scenarios with CSA or real 318 * bandwidth changes where a this could happen, but those cases are 319 * less common and wouldn't completely prevent using the AP. 320 */ 321 if (tracking && 322 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 323 return ret; 324 325 /* don't print the message below for VHT mismatch if VHT is disabled */ 326 if (ret & IEEE80211_STA_DISABLE_VHT) 327 vht_chandef = *chandef; 328 329 /* 330 * Ignore the DISABLED flag when we're already connected and only 331 * tracking the APs beacon for bandwidth changes - otherwise we 332 * might get disconnected here if we connect to an AP, update our 333 * regulatory information based on the AP's country IE and the 334 * information we have is wrong/outdated and disables the channel 335 * that we're actually using for the connection to the AP. 336 */ 337 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 338 tracking ? 0 : 339 IEEE80211_CHAN_DISABLED)) { 340 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 341 ret = IEEE80211_STA_DISABLE_HT | 342 IEEE80211_STA_DISABLE_VHT | 343 IEEE80211_STA_DISABLE_HE; 344 break; 345 } 346 347 ret |= ieee80211_chandef_downgrade(chandef); 348 } 349 350 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 351 IEEE80211_CHAN_NO_HE)) 352 ret |= IEEE80211_STA_DISABLE_HE; 353 354 if (chandef->width != vht_chandef.width && !tracking) 355 sdata_info(sdata, 356 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 357 358 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 359 return ret; 360 } 361 362 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 363 struct sta_info *sta, 364 const struct ieee80211_ht_cap *ht_cap, 365 const struct ieee80211_vht_cap *vht_cap, 366 const struct ieee80211_ht_operation *ht_oper, 367 const struct ieee80211_vht_operation *vht_oper, 368 const struct ieee80211_he_operation *he_oper, 369 const struct ieee80211_s1g_oper_ie *s1g_oper, 370 const u8 *bssid, u32 *changed) 371 { 372 struct ieee80211_local *local = sdata->local; 373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 374 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 375 struct ieee80211_supported_band *sband = 376 local->hw.wiphy->bands[chan->band]; 377 struct cfg80211_chan_def chandef; 378 u16 ht_opmode; 379 u32 flags; 380 u32 vht_cap_info = 0; 381 int ret; 382 383 /* if HT was/is disabled, don't track any bandwidth changes */ 384 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 385 return 0; 386 387 /* don't check VHT if we associated as non-VHT station */ 388 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 389 vht_oper = NULL; 390 391 /* don't check HE if we associated as non-HE station */ 392 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 393 !ieee80211_get_he_iftype_cap(sband, 394 ieee80211_vif_type_p2p(&sdata->vif))) 395 396 he_oper = NULL; 397 398 if (WARN_ON_ONCE(!sta)) 399 return -EINVAL; 400 401 /* 402 * if bss configuration changed store the new one - 403 * this may be applicable even if channel is identical 404 */ 405 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 406 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 407 *changed |= BSS_CHANGED_HT; 408 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 409 } 410 411 if (vht_cap) 412 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 413 414 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 415 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 416 ht_oper, vht_oper, he_oper, 417 s1g_oper, &chandef, true); 418 419 /* 420 * Downgrade the new channel if we associated with restricted 421 * capabilities. For example, if we associated as a 20 MHz STA 422 * to a 40 MHz AP (due to regulatory, capabilities or config 423 * reasons) then switching to a 40 MHz channel now won't do us 424 * any good -- we couldn't use it with the AP. 425 */ 426 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 427 chandef.width == NL80211_CHAN_WIDTH_80P80) 428 flags |= ieee80211_chandef_downgrade(&chandef); 429 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 430 chandef.width == NL80211_CHAN_WIDTH_160) 431 flags |= ieee80211_chandef_downgrade(&chandef); 432 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 433 chandef.width > NL80211_CHAN_WIDTH_20) 434 flags |= ieee80211_chandef_downgrade(&chandef); 435 436 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 437 return 0; 438 439 sdata_info(sdata, 440 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 441 "width %d (%d.%03d/%d MHz)\n", 442 ifmgd->bssid, chandef.chan->center_freq, 443 chandef.chan->freq_offset, chandef.width, 444 chandef.center_freq1, chandef.freq1_offset, 445 chandef.center_freq2); 446 447 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 448 IEEE80211_STA_DISABLE_VHT | 449 IEEE80211_STA_DISABLE_HE | 450 IEEE80211_STA_DISABLE_40MHZ | 451 IEEE80211_STA_DISABLE_80P80MHZ | 452 IEEE80211_STA_DISABLE_160MHZ)) || 453 !cfg80211_chandef_valid(&chandef)) { 454 sdata_info(sdata, 455 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 456 ifmgd->bssid, flags, ifmgd->flags); 457 return -EINVAL; 458 } 459 460 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 461 462 if (ret) { 463 sdata_info(sdata, 464 "AP %pM changed bandwidth to incompatible one - disconnect\n", 465 ifmgd->bssid); 466 return ret; 467 } 468 469 return 0; 470 } 471 472 /* frame sending functions */ 473 474 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 475 struct sk_buff *skb, u8 ap_ht_param, 476 struct ieee80211_supported_band *sband, 477 struct ieee80211_channel *channel, 478 enum ieee80211_smps_mode smps) 479 { 480 u8 *pos; 481 u32 flags = channel->flags; 482 u16 cap; 483 struct ieee80211_sta_ht_cap ht_cap; 484 485 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 486 487 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 488 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 489 490 /* determine capability flags */ 491 cap = ht_cap.cap; 492 493 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 494 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 495 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 496 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 497 cap &= ~IEEE80211_HT_CAP_SGI_40; 498 } 499 break; 500 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 501 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 502 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 503 cap &= ~IEEE80211_HT_CAP_SGI_40; 504 } 505 break; 506 } 507 508 /* 509 * If 40 MHz was disabled associate as though we weren't 510 * capable of 40 MHz -- some broken APs will never fall 511 * back to trying to transmit in 20 MHz. 512 */ 513 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 515 cap &= ~IEEE80211_HT_CAP_SGI_40; 516 } 517 518 /* set SM PS mode properly */ 519 cap &= ~IEEE80211_HT_CAP_SM_PS; 520 switch (smps) { 521 case IEEE80211_SMPS_AUTOMATIC: 522 case IEEE80211_SMPS_NUM_MODES: 523 WARN_ON(1); 524 fallthrough; 525 case IEEE80211_SMPS_OFF: 526 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 527 IEEE80211_HT_CAP_SM_PS_SHIFT; 528 break; 529 case IEEE80211_SMPS_STATIC: 530 cap |= WLAN_HT_CAP_SM_PS_STATIC << 531 IEEE80211_HT_CAP_SM_PS_SHIFT; 532 break; 533 case IEEE80211_SMPS_DYNAMIC: 534 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 535 IEEE80211_HT_CAP_SM_PS_SHIFT; 536 break; 537 } 538 539 /* reserve and fill IE */ 540 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 541 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 542 } 543 544 /* This function determines vht capability flags for the association 545 * and builds the IE. 546 * Note - the function may set the owner of the MU-MIMO capability 547 */ 548 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 549 struct sk_buff *skb, 550 struct ieee80211_supported_band *sband, 551 struct ieee80211_vht_cap *ap_vht_cap) 552 { 553 struct ieee80211_local *local = sdata->local; 554 u8 *pos; 555 u32 cap; 556 struct ieee80211_sta_vht_cap vht_cap; 557 u32 mask, ap_bf_sts, our_bf_sts; 558 559 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 560 561 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 562 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 563 564 /* determine capability flags */ 565 cap = vht_cap.cap; 566 567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 568 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 569 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 571 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 572 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 573 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 574 } 575 576 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 577 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 578 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 579 } 580 581 /* 582 * Some APs apparently get confused if our capabilities are better 583 * than theirs, so restrict what we advertise in the assoc request. 584 */ 585 if (!(ap_vht_cap->vht_cap_info & 586 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 587 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 588 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 589 else if (!(ap_vht_cap->vht_cap_info & 590 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 591 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 592 593 /* 594 * If some other vif is using the MU-MIMO capability we cannot associate 595 * using MU-MIMO - this will lead to contradictions in the group-id 596 * mechanism. 597 * Ownership is defined since association request, in order to avoid 598 * simultaneous associations with MU-MIMO. 599 */ 600 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 601 bool disable_mu_mimo = false; 602 struct ieee80211_sub_if_data *other; 603 604 list_for_each_entry_rcu(other, &local->interfaces, list) { 605 if (other->vif.mu_mimo_owner) { 606 disable_mu_mimo = true; 607 break; 608 } 609 } 610 if (disable_mu_mimo) 611 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 612 else 613 sdata->vif.mu_mimo_owner = true; 614 } 615 616 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 617 618 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 619 our_bf_sts = cap & mask; 620 621 if (ap_bf_sts < our_bf_sts) { 622 cap &= ~mask; 623 cap |= ap_bf_sts; 624 } 625 626 /* reserve and fill IE */ 627 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 628 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 629 } 630 631 /* This function determines HE capability flags for the association 632 * and builds the IE. 633 */ 634 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 635 struct sk_buff *skb, 636 struct ieee80211_supported_band *sband) 637 { 638 u8 *pos; 639 const struct ieee80211_sta_he_cap *he_cap = NULL; 640 struct ieee80211_chanctx_conf *chanctx_conf; 641 u8 he_cap_size; 642 bool reg_cap = false; 643 644 rcu_read_lock(); 645 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 646 if (!WARN_ON_ONCE(!chanctx_conf)) 647 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 648 &chanctx_conf->def, 649 IEEE80211_CHAN_NO_HE); 650 651 rcu_read_unlock(); 652 653 he_cap = ieee80211_get_he_iftype_cap(sband, 654 ieee80211_vif_type_p2p(&sdata->vif)); 655 if (!he_cap || !reg_cap) 656 return; 657 658 he_cap_size = 659 2 + 1 + sizeof(he_cap->he_cap_elem) + 660 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 661 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 662 he_cap->he_cap_elem.phy_cap_info); 663 pos = skb_put(skb, he_cap_size); 664 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 665 666 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 667 } 668 669 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 670 { 671 struct ieee80211_local *local = sdata->local; 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 673 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 674 struct sk_buff *skb; 675 struct ieee80211_mgmt *mgmt; 676 u8 *pos, qos_info, *ie_start; 677 size_t offset = 0, noffset; 678 int i, count, rates_len, supp_rates_len, shift; 679 u16 capab; 680 struct ieee80211_supported_band *sband; 681 struct ieee80211_chanctx_conf *chanctx_conf; 682 struct ieee80211_channel *chan; 683 u32 rates = 0; 684 __le16 listen_int; 685 struct element *ext_capa = NULL; 686 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 687 const struct ieee80211_sband_iftype_data *iftd; 688 struct ieee80211_prep_tx_info info = {}; 689 690 /* we know it's writable, cast away the const */ 691 if (assoc_data->ie_len) 692 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 693 assoc_data->ie, 694 assoc_data->ie_len); 695 696 sdata_assert_lock(sdata); 697 698 rcu_read_lock(); 699 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 700 if (WARN_ON(!chanctx_conf)) { 701 rcu_read_unlock(); 702 return; 703 } 704 chan = chanctx_conf->def.chan; 705 rcu_read_unlock(); 706 sband = local->hw.wiphy->bands[chan->band]; 707 shift = ieee80211_vif_get_shift(&sdata->vif); 708 709 if (assoc_data->supp_rates_len) { 710 /* 711 * Get all rates supported by the device and the AP as 712 * some APs don't like getting a superset of their rates 713 * in the association request (e.g. D-Link DAP 1353 in 714 * b-only mode)... 715 */ 716 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 717 assoc_data->supp_rates, 718 assoc_data->supp_rates_len, 719 &rates); 720 } else { 721 /* 722 * In case AP not provide any supported rates information 723 * before association, we send information element(s) with 724 * all rates that we support. 725 */ 726 rates_len = 0; 727 for (i = 0; i < sband->n_bitrates; i++) { 728 rates |= BIT(i); 729 rates_len++; 730 } 731 } 732 733 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 734 735 skb = alloc_skb(local->hw.extra_tx_headroom + 736 sizeof(*mgmt) + /* bit too much but doesn't matter */ 737 2 + assoc_data->ssid_len + /* SSID */ 738 4 + rates_len + /* (extended) rates */ 739 4 + /* power capability */ 740 2 + 2 * sband->n_channels + /* supported channels */ 741 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 742 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 743 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 744 sizeof(struct ieee80211_he_mcs_nss_supp) + 745 IEEE80211_HE_PPE_THRES_MAX_LEN + 746 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 747 assoc_data->ie_len + /* extra IEs */ 748 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 749 9 + /* WMM */ 750 (iftd ? iftd->vendor_elems.len : 0), 751 GFP_KERNEL); 752 if (!skb) 753 return; 754 755 skb_reserve(skb, local->hw.extra_tx_headroom); 756 757 capab = WLAN_CAPABILITY_ESS; 758 759 if (sband->band == NL80211_BAND_2GHZ) { 760 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 761 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 762 } 763 764 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 765 capab |= WLAN_CAPABILITY_PRIVACY; 766 767 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 768 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 769 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 770 771 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 772 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 773 774 mgmt = skb_put_zero(skb, 24); 775 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 776 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 777 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 778 779 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 780 ieee80211_encode_usf(local->hw.conf.listen_interval) : 781 local->hw.conf.listen_interval); 782 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 783 skb_put(skb, 10); 784 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 785 IEEE80211_STYPE_REASSOC_REQ); 786 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 787 mgmt->u.reassoc_req.listen_interval = listen_int; 788 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 789 ETH_ALEN); 790 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 791 } else { 792 skb_put(skb, 4); 793 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 794 IEEE80211_STYPE_ASSOC_REQ); 795 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 796 mgmt->u.assoc_req.listen_interval = listen_int; 797 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 798 } 799 800 /* SSID */ 801 pos = skb_put(skb, 2 + assoc_data->ssid_len); 802 ie_start = pos; 803 *pos++ = WLAN_EID_SSID; 804 *pos++ = assoc_data->ssid_len; 805 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 806 807 if (sband->band == NL80211_BAND_S1GHZ) 808 goto skip_rates; 809 810 /* add all rates which were marked to be used above */ 811 supp_rates_len = rates_len; 812 if (supp_rates_len > 8) 813 supp_rates_len = 8; 814 815 pos = skb_put(skb, supp_rates_len + 2); 816 *pos++ = WLAN_EID_SUPP_RATES; 817 *pos++ = supp_rates_len; 818 819 count = 0; 820 for (i = 0; i < sband->n_bitrates; i++) { 821 if (BIT(i) & rates) { 822 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 823 5 * (1 << shift)); 824 *pos++ = (u8) rate; 825 if (++count == 8) 826 break; 827 } 828 } 829 830 if (rates_len > count) { 831 pos = skb_put(skb, rates_len - count + 2); 832 *pos++ = WLAN_EID_EXT_SUPP_RATES; 833 *pos++ = rates_len - count; 834 835 for (i++; i < sband->n_bitrates; i++) { 836 if (BIT(i) & rates) { 837 int rate; 838 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 839 5 * (1 << shift)); 840 *pos++ = (u8) rate; 841 } 842 } 843 } 844 845 skip_rates: 846 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 847 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 848 pos = skb_put(skb, 4); 849 *pos++ = WLAN_EID_PWR_CAPABILITY; 850 *pos++ = 2; 851 *pos++ = 0; /* min tx power */ 852 /* max tx power */ 853 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 854 } 855 856 /* 857 * Per spec, we shouldn't include the list of channels if we advertise 858 * support for extended channel switching, but we've always done that; 859 * (for now?) apply this restriction only on the (new) 6 GHz band. 860 */ 861 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 862 (sband->band != NL80211_BAND_6GHZ || 863 !ext_capa || ext_capa->datalen < 1 || 864 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 865 /* TODO: get this in reg domain format */ 866 pos = skb_put(skb, 2 * sband->n_channels + 2); 867 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 868 *pos++ = 2 * sband->n_channels; 869 for (i = 0; i < sband->n_channels; i++) { 870 *pos++ = ieee80211_frequency_to_channel( 871 sband->channels[i].center_freq); 872 *pos++ = 1; /* one channel in the subband*/ 873 } 874 } 875 876 /* Set MBSSID support for HE AP if needed */ 877 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 878 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 879 ext_capa && ext_capa->datalen >= 3) 880 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 881 882 /* if present, add any custom IEs that go before HT */ 883 if (assoc_data->ie_len) { 884 static const u8 before_ht[] = { 885 WLAN_EID_SSID, 886 WLAN_EID_SUPP_RATES, 887 WLAN_EID_EXT_SUPP_RATES, 888 WLAN_EID_PWR_CAPABILITY, 889 WLAN_EID_SUPPORTED_CHANNELS, 890 WLAN_EID_RSN, 891 WLAN_EID_QOS_CAPA, 892 WLAN_EID_RRM_ENABLED_CAPABILITIES, 893 WLAN_EID_MOBILITY_DOMAIN, 894 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 895 WLAN_EID_RIC_DATA, /* reassoc only */ 896 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 897 }; 898 static const u8 after_ric[] = { 899 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 900 WLAN_EID_HT_CAPABILITY, 901 WLAN_EID_BSS_COEX_2040, 902 /* luckily this is almost always there */ 903 WLAN_EID_EXT_CAPABILITY, 904 WLAN_EID_QOS_TRAFFIC_CAPA, 905 WLAN_EID_TIM_BCAST_REQ, 906 WLAN_EID_INTERWORKING, 907 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 908 WLAN_EID_VHT_CAPABILITY, 909 WLAN_EID_OPMODE_NOTIF, 910 }; 911 912 noffset = ieee80211_ie_split_ric(assoc_data->ie, 913 assoc_data->ie_len, 914 before_ht, 915 ARRAY_SIZE(before_ht), 916 after_ric, 917 ARRAY_SIZE(after_ric), 918 offset); 919 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 920 offset = noffset; 921 } 922 923 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 924 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 925 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 926 927 if (sband->band != NL80211_BAND_6GHZ && 928 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 929 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 930 sband, chan, sdata->smps_mode); 931 932 /* if present, add any custom IEs that go before VHT */ 933 if (assoc_data->ie_len) { 934 static const u8 before_vht[] = { 935 /* 936 * no need to list the ones split off before HT 937 * or generated here 938 */ 939 WLAN_EID_BSS_COEX_2040, 940 WLAN_EID_EXT_CAPABILITY, 941 WLAN_EID_QOS_TRAFFIC_CAPA, 942 WLAN_EID_TIM_BCAST_REQ, 943 WLAN_EID_INTERWORKING, 944 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 945 }; 946 947 /* RIC already taken above, so no need to handle here anymore */ 948 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 949 before_vht, ARRAY_SIZE(before_vht), 950 offset); 951 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 952 offset = noffset; 953 } 954 955 /* if present, add any custom IEs that go before HE */ 956 if (assoc_data->ie_len) { 957 static const u8 before_he[] = { 958 /* 959 * no need to list the ones split off before VHT 960 * or generated here 961 */ 962 WLAN_EID_OPMODE_NOTIF, 963 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 964 /* 11ai elements */ 965 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 966 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 967 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 968 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 969 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 970 /* TODO: add 11ah/11aj/11ak elements */ 971 }; 972 973 /* RIC already taken above, so no need to handle here anymore */ 974 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 975 before_he, ARRAY_SIZE(before_he), 976 offset); 977 pos = skb_put(skb, noffset - offset); 978 memcpy(pos, assoc_data->ie + offset, noffset - offset); 979 offset = noffset; 980 } 981 982 if (sband->band != NL80211_BAND_6GHZ && 983 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 984 ieee80211_add_vht_ie(sdata, skb, sband, 985 &assoc_data->ap_vht_cap); 986 987 /* 988 * If AP doesn't support HT, mark HE as disabled. 989 * If on the 5GHz band, make sure it supports VHT. 990 */ 991 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 992 (sband->band == NL80211_BAND_5GHZ && 993 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 994 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 995 996 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 997 ieee80211_add_he_ie(sdata, skb, sband); 998 999 /* if present, add any custom non-vendor IEs that go after HE */ 1000 if (assoc_data->ie_len) { 1001 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1002 assoc_data->ie_len, 1003 offset); 1004 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1005 offset = noffset; 1006 } 1007 1008 if (assoc_data->wmm) { 1009 if (assoc_data->uapsd) { 1010 qos_info = ifmgd->uapsd_queues; 1011 qos_info |= (ifmgd->uapsd_max_sp_len << 1012 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1013 } else { 1014 qos_info = 0; 1015 } 1016 1017 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1018 } 1019 1020 if (sband->band == NL80211_BAND_S1GHZ) { 1021 ieee80211_add_aid_request_ie(sdata, skb); 1022 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1023 } 1024 1025 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1026 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1027 1028 /* add any remaining custom (i.e. vendor specific here) IEs */ 1029 if (assoc_data->ie_len) { 1030 noffset = assoc_data->ie_len; 1031 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1032 } 1033 1034 if (assoc_data->fils_kek_len && 1035 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 1036 dev_kfree_skb(skb); 1037 return; 1038 } 1039 1040 pos = skb_tail_pointer(skb); 1041 kfree(ifmgd->assoc_req_ies); 1042 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1043 ifmgd->assoc_req_ies_len = pos - ie_start; 1044 1045 drv_mgd_prepare_tx(local, sdata, &info); 1046 1047 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1048 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1049 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1050 IEEE80211_TX_INTFL_MLME_CONN_TX; 1051 ieee80211_tx_skb(sdata, skb); 1052 } 1053 1054 void ieee80211_send_pspoll(struct ieee80211_local *local, 1055 struct ieee80211_sub_if_data *sdata) 1056 { 1057 struct ieee80211_pspoll *pspoll; 1058 struct sk_buff *skb; 1059 1060 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1061 if (!skb) 1062 return; 1063 1064 pspoll = (struct ieee80211_pspoll *) skb->data; 1065 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1066 1067 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1068 ieee80211_tx_skb(sdata, skb); 1069 } 1070 1071 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1072 struct ieee80211_sub_if_data *sdata, 1073 bool powersave) 1074 { 1075 struct sk_buff *skb; 1076 struct ieee80211_hdr_3addr *nullfunc; 1077 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1078 1079 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1080 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1081 if (!skb) 1082 return; 1083 1084 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1085 if (powersave) 1086 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1087 1088 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1089 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1090 1091 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1092 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1093 1094 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1095 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1096 1097 ieee80211_tx_skb(sdata, skb); 1098 } 1099 1100 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1101 struct ieee80211_sub_if_data *sdata) 1102 { 1103 struct sk_buff *skb; 1104 struct ieee80211_hdr *nullfunc; 1105 __le16 fc; 1106 1107 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1108 return; 1109 1110 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1111 if (!skb) 1112 return; 1113 1114 skb_reserve(skb, local->hw.extra_tx_headroom); 1115 1116 nullfunc = skb_put_zero(skb, 30); 1117 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1118 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1119 nullfunc->frame_control = fc; 1120 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1121 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1122 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1123 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1124 1125 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1126 ieee80211_tx_skb(sdata, skb); 1127 } 1128 1129 /* spectrum management related things */ 1130 static void ieee80211_chswitch_work(struct work_struct *work) 1131 { 1132 struct ieee80211_sub_if_data *sdata = 1133 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1134 struct ieee80211_local *local = sdata->local; 1135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1136 int ret; 1137 1138 if (!ieee80211_sdata_running(sdata)) 1139 return; 1140 1141 sdata_lock(sdata); 1142 mutex_lock(&local->mtx); 1143 mutex_lock(&local->chanctx_mtx); 1144 1145 if (!ifmgd->associated) 1146 goto out; 1147 1148 if (!sdata->vif.csa_active) 1149 goto out; 1150 1151 /* 1152 * using reservation isn't immediate as it may be deferred until later 1153 * with multi-vif. once reservation is complete it will re-schedule the 1154 * work with no reserved_chanctx so verify chandef to check if it 1155 * completed successfully 1156 */ 1157 1158 if (sdata->reserved_chanctx) { 1159 /* 1160 * with multi-vif csa driver may call ieee80211_csa_finish() 1161 * many times while waiting for other interfaces to use their 1162 * reservations 1163 */ 1164 if (sdata->reserved_ready) 1165 goto out; 1166 1167 ret = ieee80211_vif_use_reserved_context(sdata); 1168 if (ret) { 1169 sdata_info(sdata, 1170 "failed to use reserved channel context, disconnecting (err=%d)\n", 1171 ret); 1172 ieee80211_queue_work(&sdata->local->hw, 1173 &ifmgd->csa_connection_drop_work); 1174 goto out; 1175 } 1176 1177 goto out; 1178 } 1179 1180 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1181 &sdata->csa_chandef)) { 1182 sdata_info(sdata, 1183 "failed to finalize channel switch, disconnecting\n"); 1184 ieee80211_queue_work(&sdata->local->hw, 1185 &ifmgd->csa_connection_drop_work); 1186 goto out; 1187 } 1188 1189 ifmgd->csa_waiting_bcn = true; 1190 1191 ieee80211_sta_reset_beacon_monitor(sdata); 1192 ieee80211_sta_reset_conn_monitor(sdata); 1193 1194 out: 1195 mutex_unlock(&local->chanctx_mtx); 1196 mutex_unlock(&local->mtx); 1197 sdata_unlock(sdata); 1198 } 1199 1200 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1201 { 1202 struct ieee80211_local *local = sdata->local; 1203 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1204 int ret; 1205 1206 sdata_assert_lock(sdata); 1207 1208 WARN_ON(!sdata->vif.csa_active); 1209 1210 if (sdata->csa_block_tx) { 1211 ieee80211_wake_vif_queues(local, sdata, 1212 IEEE80211_QUEUE_STOP_REASON_CSA); 1213 sdata->csa_block_tx = false; 1214 } 1215 1216 sdata->vif.csa_active = false; 1217 ifmgd->csa_waiting_bcn = false; 1218 /* 1219 * If the CSA IE is still present on the beacon after the switch, 1220 * we need to consider it as a new CSA (possibly to self). 1221 */ 1222 ifmgd->beacon_crc_valid = false; 1223 1224 ret = drv_post_channel_switch(sdata); 1225 if (ret) { 1226 sdata_info(sdata, 1227 "driver post channel switch failed, disconnecting\n"); 1228 ieee80211_queue_work(&local->hw, 1229 &ifmgd->csa_connection_drop_work); 1230 return; 1231 } 1232 1233 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1234 } 1235 1236 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1237 { 1238 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1240 1241 trace_api_chswitch_done(sdata, success); 1242 if (!success) { 1243 sdata_info(sdata, 1244 "driver channel switch failed, disconnecting\n"); 1245 ieee80211_queue_work(&sdata->local->hw, 1246 &ifmgd->csa_connection_drop_work); 1247 } else { 1248 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1249 } 1250 } 1251 EXPORT_SYMBOL(ieee80211_chswitch_done); 1252 1253 static void ieee80211_chswitch_timer(struct timer_list *t) 1254 { 1255 struct ieee80211_sub_if_data *sdata = 1256 from_timer(sdata, t, u.mgd.chswitch_timer); 1257 1258 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1259 } 1260 1261 static void 1262 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1263 { 1264 struct ieee80211_local *local = sdata->local; 1265 1266 if (!local->ops->abort_channel_switch) 1267 return; 1268 1269 mutex_lock(&local->mtx); 1270 1271 mutex_lock(&local->chanctx_mtx); 1272 ieee80211_vif_unreserve_chanctx(sdata); 1273 mutex_unlock(&local->chanctx_mtx); 1274 1275 if (sdata->csa_block_tx) 1276 ieee80211_wake_vif_queues(local, sdata, 1277 IEEE80211_QUEUE_STOP_REASON_CSA); 1278 1279 sdata->csa_block_tx = false; 1280 sdata->vif.csa_active = false; 1281 1282 mutex_unlock(&local->mtx); 1283 1284 drv_abort_channel_switch(sdata); 1285 } 1286 1287 static void 1288 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1289 u64 timestamp, u32 device_timestamp, 1290 struct ieee802_11_elems *elems, 1291 bool beacon) 1292 { 1293 struct ieee80211_local *local = sdata->local; 1294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1295 struct cfg80211_bss *cbss = ifmgd->associated; 1296 struct ieee80211_chanctx_conf *conf; 1297 struct ieee80211_chanctx *chanctx; 1298 enum nl80211_band current_band; 1299 struct ieee80211_csa_ie csa_ie; 1300 struct ieee80211_channel_switch ch_switch; 1301 struct ieee80211_bss *bss; 1302 int res; 1303 1304 sdata_assert_lock(sdata); 1305 1306 if (!cbss) 1307 return; 1308 1309 if (local->scanning) 1310 return; 1311 1312 current_band = cbss->channel->band; 1313 bss = (void *)cbss->priv; 1314 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1315 bss->vht_cap_info, 1316 ifmgd->flags, 1317 ifmgd->associated->bssid, &csa_ie); 1318 1319 if (!res) { 1320 ch_switch.timestamp = timestamp; 1321 ch_switch.device_timestamp = device_timestamp; 1322 ch_switch.block_tx = csa_ie.mode; 1323 ch_switch.chandef = csa_ie.chandef; 1324 ch_switch.count = csa_ie.count; 1325 ch_switch.delay = csa_ie.max_switch_time; 1326 } 1327 1328 if (res < 0) 1329 goto lock_and_drop_connection; 1330 1331 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1332 if (res) 1333 ieee80211_sta_abort_chanswitch(sdata); 1334 else 1335 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1336 return; 1337 } else if (sdata->vif.csa_active || res) { 1338 /* disregard subsequent announcements if already processing */ 1339 return; 1340 } 1341 1342 if (sdata->vif.bss_conf.chandef.chan->band != 1343 csa_ie.chandef.chan->band) { 1344 sdata_info(sdata, 1345 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1346 ifmgd->associated->bssid, 1347 csa_ie.chandef.chan->center_freq, 1348 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1349 csa_ie.chandef.center_freq2); 1350 goto lock_and_drop_connection; 1351 } 1352 1353 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1354 IEEE80211_CHAN_DISABLED)) { 1355 sdata_info(sdata, 1356 "AP %pM switches to unsupported channel " 1357 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1358 "disconnecting\n", 1359 ifmgd->associated->bssid, 1360 csa_ie.chandef.chan->center_freq, 1361 csa_ie.chandef.chan->freq_offset, 1362 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1363 csa_ie.chandef.freq1_offset, 1364 csa_ie.chandef.center_freq2); 1365 goto lock_and_drop_connection; 1366 } 1367 1368 if (cfg80211_chandef_identical(&csa_ie.chandef, 1369 &sdata->vif.bss_conf.chandef) && 1370 (!csa_ie.mode || !beacon)) { 1371 if (ifmgd->csa_ignored_same_chan) 1372 return; 1373 sdata_info(sdata, 1374 "AP %pM tries to chanswitch to same channel, ignore\n", 1375 ifmgd->associated->bssid); 1376 ifmgd->csa_ignored_same_chan = true; 1377 return; 1378 } 1379 1380 /* 1381 * Drop all TDLS peers - either we disconnect or move to a different 1382 * channel from this point on. There's no telling what our peer will do. 1383 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1384 * have an incompatible wider chandef. 1385 */ 1386 ieee80211_teardown_tdls_peers(sdata); 1387 1388 mutex_lock(&local->mtx); 1389 mutex_lock(&local->chanctx_mtx); 1390 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1391 lockdep_is_held(&local->chanctx_mtx)); 1392 if (!conf) { 1393 sdata_info(sdata, 1394 "no channel context assigned to vif?, disconnecting\n"); 1395 goto drop_connection; 1396 } 1397 1398 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1399 1400 if (local->use_chanctx && 1401 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1402 sdata_info(sdata, 1403 "driver doesn't support chan-switch with channel contexts\n"); 1404 goto drop_connection; 1405 } 1406 1407 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1408 sdata_info(sdata, 1409 "preparing for channel switch failed, disconnecting\n"); 1410 goto drop_connection; 1411 } 1412 1413 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1414 chanctx->mode, false); 1415 if (res) { 1416 sdata_info(sdata, 1417 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1418 res); 1419 goto drop_connection; 1420 } 1421 mutex_unlock(&local->chanctx_mtx); 1422 1423 sdata->vif.csa_active = true; 1424 sdata->csa_chandef = csa_ie.chandef; 1425 sdata->csa_block_tx = csa_ie.mode; 1426 ifmgd->csa_ignored_same_chan = false; 1427 ifmgd->beacon_crc_valid = false; 1428 1429 if (sdata->csa_block_tx) 1430 ieee80211_stop_vif_queues(local, sdata, 1431 IEEE80211_QUEUE_STOP_REASON_CSA); 1432 mutex_unlock(&local->mtx); 1433 1434 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1435 csa_ie.count, csa_ie.mode); 1436 1437 if (local->ops->channel_switch) { 1438 /* use driver's channel switch callback */ 1439 drv_channel_switch(local, sdata, &ch_switch); 1440 return; 1441 } 1442 1443 /* channel switch handled in software */ 1444 if (csa_ie.count <= 1) 1445 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1446 else 1447 mod_timer(&ifmgd->chswitch_timer, 1448 TU_TO_EXP_TIME((csa_ie.count - 1) * 1449 cbss->beacon_interval)); 1450 return; 1451 lock_and_drop_connection: 1452 mutex_lock(&local->mtx); 1453 mutex_lock(&local->chanctx_mtx); 1454 drop_connection: 1455 /* 1456 * This is just so that the disconnect flow will know that 1457 * we were trying to switch channel and failed. In case the 1458 * mode is 1 (we are not allowed to Tx), we will know not to 1459 * send a deauthentication frame. Those two fields will be 1460 * reset when the disconnection worker runs. 1461 */ 1462 sdata->vif.csa_active = true; 1463 sdata->csa_block_tx = csa_ie.mode; 1464 1465 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1466 mutex_unlock(&local->chanctx_mtx); 1467 mutex_unlock(&local->mtx); 1468 } 1469 1470 static bool 1471 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1472 struct ieee80211_channel *channel, 1473 const u8 *country_ie, u8 country_ie_len, 1474 const u8 *pwr_constr_elem, 1475 int *chan_pwr, int *pwr_reduction) 1476 { 1477 struct ieee80211_country_ie_triplet *triplet; 1478 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1479 int i, chan_increment; 1480 bool have_chan_pwr = false; 1481 1482 /* Invalid IE */ 1483 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1484 return false; 1485 1486 triplet = (void *)(country_ie + 3); 1487 country_ie_len -= 3; 1488 1489 switch (channel->band) { 1490 default: 1491 WARN_ON_ONCE(1); 1492 fallthrough; 1493 case NL80211_BAND_2GHZ: 1494 case NL80211_BAND_60GHZ: 1495 case NL80211_BAND_LC: 1496 chan_increment = 1; 1497 break; 1498 case NL80211_BAND_5GHZ: 1499 chan_increment = 4; 1500 break; 1501 case NL80211_BAND_6GHZ: 1502 /* 1503 * In the 6 GHz band, the "maximum transmit power level" 1504 * field in the triplets is reserved, and thus will be 1505 * zero and we shouldn't use it to control TX power. 1506 * The actual TX power will be given in the transmit 1507 * power envelope element instead. 1508 */ 1509 return false; 1510 } 1511 1512 /* find channel */ 1513 while (country_ie_len >= 3) { 1514 u8 first_channel = triplet->chans.first_channel; 1515 1516 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1517 goto next; 1518 1519 for (i = 0; i < triplet->chans.num_channels; i++) { 1520 if (first_channel + i * chan_increment == chan) { 1521 have_chan_pwr = true; 1522 *chan_pwr = triplet->chans.max_power; 1523 break; 1524 } 1525 } 1526 if (have_chan_pwr) 1527 break; 1528 1529 next: 1530 triplet++; 1531 country_ie_len -= 3; 1532 } 1533 1534 if (have_chan_pwr && pwr_constr_elem) 1535 *pwr_reduction = *pwr_constr_elem; 1536 else 1537 *pwr_reduction = 0; 1538 1539 return have_chan_pwr; 1540 } 1541 1542 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1543 struct ieee80211_channel *channel, 1544 const u8 *cisco_dtpc_ie, 1545 int *pwr_level) 1546 { 1547 /* From practical testing, the first data byte of the DTPC element 1548 * seems to contain the requested dBm level, and the CLI on Cisco 1549 * APs clearly state the range is -127 to 127 dBm, which indicates 1550 * a signed byte, although it seemingly never actually goes negative. 1551 * The other byte seems to always be zero. 1552 */ 1553 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1554 } 1555 1556 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1557 struct ieee80211_channel *channel, 1558 struct ieee80211_mgmt *mgmt, 1559 const u8 *country_ie, u8 country_ie_len, 1560 const u8 *pwr_constr_ie, 1561 const u8 *cisco_dtpc_ie) 1562 { 1563 bool has_80211h_pwr = false, has_cisco_pwr = false; 1564 int chan_pwr = 0, pwr_reduction_80211h = 0; 1565 int pwr_level_cisco, pwr_level_80211h; 1566 int new_ap_level; 1567 __le16 capab = mgmt->u.probe_resp.capab_info; 1568 1569 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1570 return 0; /* TODO */ 1571 1572 if (country_ie && 1573 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1574 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1575 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1576 sdata, channel, country_ie, country_ie_len, 1577 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1578 pwr_level_80211h = 1579 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1580 } 1581 1582 if (cisco_dtpc_ie) { 1583 ieee80211_find_cisco_dtpc( 1584 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1585 has_cisco_pwr = true; 1586 } 1587 1588 if (!has_80211h_pwr && !has_cisco_pwr) 1589 return 0; 1590 1591 /* If we have both 802.11h and Cisco DTPC, apply both limits 1592 * by picking the smallest of the two power levels advertised. 1593 */ 1594 if (has_80211h_pwr && 1595 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1596 new_ap_level = pwr_level_80211h; 1597 1598 if (sdata->ap_power_level == new_ap_level) 1599 return 0; 1600 1601 sdata_dbg(sdata, 1602 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1603 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1604 sdata->u.mgd.bssid); 1605 } else { /* has_cisco_pwr is always true here. */ 1606 new_ap_level = pwr_level_cisco; 1607 1608 if (sdata->ap_power_level == new_ap_level) 1609 return 0; 1610 1611 sdata_dbg(sdata, 1612 "Limiting TX power to %d dBm as advertised by %pM\n", 1613 pwr_level_cisco, sdata->u.mgd.bssid); 1614 } 1615 1616 sdata->ap_power_level = new_ap_level; 1617 if (__ieee80211_recalc_txpower(sdata)) 1618 return BSS_CHANGED_TXPOWER; 1619 return 0; 1620 } 1621 1622 /* powersave */ 1623 static void ieee80211_enable_ps(struct ieee80211_local *local, 1624 struct ieee80211_sub_if_data *sdata) 1625 { 1626 struct ieee80211_conf *conf = &local->hw.conf; 1627 1628 /* 1629 * If we are scanning right now then the parameters will 1630 * take effect when scan finishes. 1631 */ 1632 if (local->scanning) 1633 return; 1634 1635 if (conf->dynamic_ps_timeout > 0 && 1636 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1637 mod_timer(&local->dynamic_ps_timer, jiffies + 1638 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1639 } else { 1640 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1641 ieee80211_send_nullfunc(local, sdata, true); 1642 1643 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1644 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1645 return; 1646 1647 conf->flags |= IEEE80211_CONF_PS; 1648 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1649 } 1650 } 1651 1652 static void ieee80211_change_ps(struct ieee80211_local *local) 1653 { 1654 struct ieee80211_conf *conf = &local->hw.conf; 1655 1656 if (local->ps_sdata) { 1657 ieee80211_enable_ps(local, local->ps_sdata); 1658 } else if (conf->flags & IEEE80211_CONF_PS) { 1659 conf->flags &= ~IEEE80211_CONF_PS; 1660 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1661 del_timer_sync(&local->dynamic_ps_timer); 1662 cancel_work_sync(&local->dynamic_ps_enable_work); 1663 } 1664 } 1665 1666 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1667 { 1668 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1669 struct sta_info *sta = NULL; 1670 bool authorized = false; 1671 1672 if (!mgd->powersave) 1673 return false; 1674 1675 if (mgd->broken_ap) 1676 return false; 1677 1678 if (!mgd->associated) 1679 return false; 1680 1681 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1682 return false; 1683 1684 if (!mgd->have_beacon) 1685 return false; 1686 1687 rcu_read_lock(); 1688 sta = sta_info_get(sdata, mgd->bssid); 1689 if (sta) 1690 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1691 rcu_read_unlock(); 1692 1693 return authorized; 1694 } 1695 1696 /* need to hold RTNL or interface lock */ 1697 void ieee80211_recalc_ps(struct ieee80211_local *local) 1698 { 1699 struct ieee80211_sub_if_data *sdata, *found = NULL; 1700 int count = 0; 1701 int timeout; 1702 1703 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1704 local->ps_sdata = NULL; 1705 return; 1706 } 1707 1708 list_for_each_entry(sdata, &local->interfaces, list) { 1709 if (!ieee80211_sdata_running(sdata)) 1710 continue; 1711 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1712 /* If an AP vif is found, then disable PS 1713 * by setting the count to zero thereby setting 1714 * ps_sdata to NULL. 1715 */ 1716 count = 0; 1717 break; 1718 } 1719 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1720 continue; 1721 found = sdata; 1722 count++; 1723 } 1724 1725 if (count == 1 && ieee80211_powersave_allowed(found)) { 1726 u8 dtimper = found->u.mgd.dtim_period; 1727 1728 timeout = local->dynamic_ps_forced_timeout; 1729 if (timeout < 0) 1730 timeout = 100; 1731 local->hw.conf.dynamic_ps_timeout = timeout; 1732 1733 /* If the TIM IE is invalid, pretend the value is 1 */ 1734 if (!dtimper) 1735 dtimper = 1; 1736 1737 local->hw.conf.ps_dtim_period = dtimper; 1738 local->ps_sdata = found; 1739 } else { 1740 local->ps_sdata = NULL; 1741 } 1742 1743 ieee80211_change_ps(local); 1744 } 1745 1746 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1747 { 1748 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1749 1750 if (sdata->vif.bss_conf.ps != ps_allowed) { 1751 sdata->vif.bss_conf.ps = ps_allowed; 1752 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1753 } 1754 } 1755 1756 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1757 { 1758 struct ieee80211_local *local = 1759 container_of(work, struct ieee80211_local, 1760 dynamic_ps_disable_work); 1761 1762 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1763 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1764 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1765 } 1766 1767 ieee80211_wake_queues_by_reason(&local->hw, 1768 IEEE80211_MAX_QUEUE_MAP, 1769 IEEE80211_QUEUE_STOP_REASON_PS, 1770 false); 1771 } 1772 1773 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1774 { 1775 struct ieee80211_local *local = 1776 container_of(work, struct ieee80211_local, 1777 dynamic_ps_enable_work); 1778 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1779 struct ieee80211_if_managed *ifmgd; 1780 unsigned long flags; 1781 int q; 1782 1783 /* can only happen when PS was just disabled anyway */ 1784 if (!sdata) 1785 return; 1786 1787 ifmgd = &sdata->u.mgd; 1788 1789 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1790 return; 1791 1792 if (local->hw.conf.dynamic_ps_timeout > 0) { 1793 /* don't enter PS if TX frames are pending */ 1794 if (drv_tx_frames_pending(local)) { 1795 mod_timer(&local->dynamic_ps_timer, jiffies + 1796 msecs_to_jiffies( 1797 local->hw.conf.dynamic_ps_timeout)); 1798 return; 1799 } 1800 1801 /* 1802 * transmission can be stopped by others which leads to 1803 * dynamic_ps_timer expiry. Postpone the ps timer if it 1804 * is not the actual idle state. 1805 */ 1806 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1807 for (q = 0; q < local->hw.queues; q++) { 1808 if (local->queue_stop_reasons[q]) { 1809 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1810 flags); 1811 mod_timer(&local->dynamic_ps_timer, jiffies + 1812 msecs_to_jiffies( 1813 local->hw.conf.dynamic_ps_timeout)); 1814 return; 1815 } 1816 } 1817 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1818 } 1819 1820 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1821 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1822 if (drv_tx_frames_pending(local)) { 1823 mod_timer(&local->dynamic_ps_timer, jiffies + 1824 msecs_to_jiffies( 1825 local->hw.conf.dynamic_ps_timeout)); 1826 } else { 1827 ieee80211_send_nullfunc(local, sdata, true); 1828 /* Flush to get the tx status of nullfunc frame */ 1829 ieee80211_flush_queues(local, sdata, false); 1830 } 1831 } 1832 1833 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1834 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1835 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1836 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1837 local->hw.conf.flags |= IEEE80211_CONF_PS; 1838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1839 } 1840 } 1841 1842 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1843 { 1844 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1845 1846 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1847 } 1848 1849 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1850 { 1851 struct delayed_work *delayed_work = to_delayed_work(work); 1852 struct ieee80211_sub_if_data *sdata = 1853 container_of(delayed_work, struct ieee80211_sub_if_data, 1854 dfs_cac_timer_work); 1855 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1856 1857 mutex_lock(&sdata->local->mtx); 1858 if (sdata->wdev.cac_started) { 1859 ieee80211_vif_release_channel(sdata); 1860 cfg80211_cac_event(sdata->dev, &chandef, 1861 NL80211_RADAR_CAC_FINISHED, 1862 GFP_KERNEL); 1863 } 1864 mutex_unlock(&sdata->local->mtx); 1865 } 1866 1867 static bool 1868 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1869 { 1870 struct ieee80211_local *local = sdata->local; 1871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1872 bool ret = false; 1873 int ac; 1874 1875 if (local->hw.queues < IEEE80211_NUM_ACS) 1876 return false; 1877 1878 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1879 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1880 int non_acm_ac; 1881 unsigned long now = jiffies; 1882 1883 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1884 tx_tspec->admitted_time && 1885 time_after(now, tx_tspec->time_slice_start + HZ)) { 1886 tx_tspec->consumed_tx_time = 0; 1887 tx_tspec->time_slice_start = now; 1888 1889 if (tx_tspec->downgraded) 1890 tx_tspec->action = 1891 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1892 } 1893 1894 switch (tx_tspec->action) { 1895 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1896 /* take the original parameters */ 1897 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1898 sdata_err(sdata, 1899 "failed to set TX queue parameters for queue %d\n", 1900 ac); 1901 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1902 tx_tspec->downgraded = false; 1903 ret = true; 1904 break; 1905 case TX_TSPEC_ACTION_DOWNGRADE: 1906 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1907 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1908 ret = true; 1909 break; 1910 } 1911 /* downgrade next lower non-ACM AC */ 1912 for (non_acm_ac = ac + 1; 1913 non_acm_ac < IEEE80211_NUM_ACS; 1914 non_acm_ac++) 1915 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1916 break; 1917 /* Usually the loop will result in using BK even if it 1918 * requires admission control, but such a configuration 1919 * makes no sense and we have to transmit somehow - the 1920 * AC selection does the same thing. 1921 * If we started out trying to downgrade from BK, then 1922 * the extra condition here might be needed. 1923 */ 1924 if (non_acm_ac >= IEEE80211_NUM_ACS) 1925 non_acm_ac = IEEE80211_AC_BK; 1926 if (drv_conf_tx(local, sdata, ac, 1927 &sdata->tx_conf[non_acm_ac])) 1928 sdata_err(sdata, 1929 "failed to set TX queue parameters for queue %d\n", 1930 ac); 1931 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1932 ret = true; 1933 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1934 tx_tspec->time_slice_start + HZ - now + 1); 1935 break; 1936 case TX_TSPEC_ACTION_NONE: 1937 /* nothing now */ 1938 break; 1939 } 1940 } 1941 1942 return ret; 1943 } 1944 1945 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1946 { 1947 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1948 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1949 } 1950 1951 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1952 { 1953 struct ieee80211_sub_if_data *sdata; 1954 1955 sdata = container_of(work, struct ieee80211_sub_if_data, 1956 u.mgd.tx_tspec_wk.work); 1957 ieee80211_sta_handle_tspec_ac_params(sdata); 1958 } 1959 1960 /* MLME */ 1961 static bool 1962 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1963 struct ieee80211_sub_if_data *sdata, 1964 const u8 *wmm_param, size_t wmm_param_len, 1965 const struct ieee80211_mu_edca_param_set *mu_edca) 1966 { 1967 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1969 size_t left; 1970 int count, mu_edca_count, ac; 1971 const u8 *pos; 1972 u8 uapsd_queues = 0; 1973 1974 if (!local->ops->conf_tx) 1975 return false; 1976 1977 if (local->hw.queues < IEEE80211_NUM_ACS) 1978 return false; 1979 1980 if (!wmm_param) 1981 return false; 1982 1983 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1984 return false; 1985 1986 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1987 uapsd_queues = ifmgd->uapsd_queues; 1988 1989 count = wmm_param[6] & 0x0f; 1990 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 1991 * if mu_edca was preset before and now it disappeared tell 1992 * the driver about it. 1993 */ 1994 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 1995 if (count == ifmgd->wmm_last_param_set && 1996 mu_edca_count == ifmgd->mu_edca_last_param_set) 1997 return false; 1998 ifmgd->wmm_last_param_set = count; 1999 ifmgd->mu_edca_last_param_set = mu_edca_count; 2000 2001 pos = wmm_param + 8; 2002 left = wmm_param_len - 8; 2003 2004 memset(¶ms, 0, sizeof(params)); 2005 2006 sdata->wmm_acm = 0; 2007 for (; left >= 4; left -= 4, pos += 4) { 2008 int aci = (pos[0] >> 5) & 0x03; 2009 int acm = (pos[0] >> 4) & 0x01; 2010 bool uapsd = false; 2011 2012 switch (aci) { 2013 case 1: /* AC_BK */ 2014 ac = IEEE80211_AC_BK; 2015 if (acm) 2016 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2017 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2018 uapsd = true; 2019 params[ac].mu_edca = !!mu_edca; 2020 if (mu_edca) 2021 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2022 break; 2023 case 2: /* AC_VI */ 2024 ac = IEEE80211_AC_VI; 2025 if (acm) 2026 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2027 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2028 uapsd = true; 2029 params[ac].mu_edca = !!mu_edca; 2030 if (mu_edca) 2031 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2032 break; 2033 case 3: /* AC_VO */ 2034 ac = IEEE80211_AC_VO; 2035 if (acm) 2036 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2037 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2038 uapsd = true; 2039 params[ac].mu_edca = !!mu_edca; 2040 if (mu_edca) 2041 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2042 break; 2043 case 0: /* AC_BE */ 2044 default: 2045 ac = IEEE80211_AC_BE; 2046 if (acm) 2047 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2048 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2049 uapsd = true; 2050 params[ac].mu_edca = !!mu_edca; 2051 if (mu_edca) 2052 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2053 break; 2054 } 2055 2056 params[ac].aifs = pos[0] & 0x0f; 2057 2058 if (params[ac].aifs < 2) { 2059 sdata_info(sdata, 2060 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2061 params[ac].aifs, aci); 2062 params[ac].aifs = 2; 2063 } 2064 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2065 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2066 params[ac].txop = get_unaligned_le16(pos + 2); 2067 params[ac].acm = acm; 2068 params[ac].uapsd = uapsd; 2069 2070 if (params[ac].cw_min == 0 || 2071 params[ac].cw_min > params[ac].cw_max) { 2072 sdata_info(sdata, 2073 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2074 params[ac].cw_min, params[ac].cw_max, aci); 2075 return false; 2076 } 2077 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2078 } 2079 2080 /* WMM specification requires all 4 ACIs. */ 2081 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2082 if (params[ac].cw_min == 0) { 2083 sdata_info(sdata, 2084 "AP has invalid WMM params (missing AC %d), using defaults\n", 2085 ac); 2086 return false; 2087 } 2088 } 2089 2090 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2091 mlme_dbg(sdata, 2092 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2093 ac, params[ac].acm, 2094 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2095 params[ac].txop, params[ac].uapsd, 2096 ifmgd->tx_tspec[ac].downgraded); 2097 sdata->tx_conf[ac] = params[ac]; 2098 if (!ifmgd->tx_tspec[ac].downgraded && 2099 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2100 sdata_err(sdata, 2101 "failed to set TX queue parameters for AC %d\n", 2102 ac); 2103 } 2104 2105 /* enable WMM or activate new settings */ 2106 sdata->vif.bss_conf.qos = true; 2107 return true; 2108 } 2109 2110 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2111 { 2112 lockdep_assert_held(&sdata->local->mtx); 2113 2114 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2115 ieee80211_run_deferred_scan(sdata->local); 2116 } 2117 2118 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2119 { 2120 mutex_lock(&sdata->local->mtx); 2121 __ieee80211_stop_poll(sdata); 2122 mutex_unlock(&sdata->local->mtx); 2123 } 2124 2125 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2126 u16 capab, bool erp_valid, u8 erp) 2127 { 2128 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2129 struct ieee80211_supported_band *sband; 2130 u32 changed = 0; 2131 bool use_protection; 2132 bool use_short_preamble; 2133 bool use_short_slot; 2134 2135 sband = ieee80211_get_sband(sdata); 2136 if (!sband) 2137 return changed; 2138 2139 if (erp_valid) { 2140 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2141 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2142 } else { 2143 use_protection = false; 2144 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2145 } 2146 2147 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2148 if (sband->band == NL80211_BAND_5GHZ || 2149 sband->band == NL80211_BAND_6GHZ) 2150 use_short_slot = true; 2151 2152 if (use_protection != bss_conf->use_cts_prot) { 2153 bss_conf->use_cts_prot = use_protection; 2154 changed |= BSS_CHANGED_ERP_CTS_PROT; 2155 } 2156 2157 if (use_short_preamble != bss_conf->use_short_preamble) { 2158 bss_conf->use_short_preamble = use_short_preamble; 2159 changed |= BSS_CHANGED_ERP_PREAMBLE; 2160 } 2161 2162 if (use_short_slot != bss_conf->use_short_slot) { 2163 bss_conf->use_short_slot = use_short_slot; 2164 changed |= BSS_CHANGED_ERP_SLOT; 2165 } 2166 2167 return changed; 2168 } 2169 2170 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2171 struct cfg80211_bss *cbss, 2172 u32 bss_info_changed) 2173 { 2174 struct ieee80211_bss *bss = (void *)cbss->priv; 2175 struct ieee80211_local *local = sdata->local; 2176 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2177 2178 bss_info_changed |= BSS_CHANGED_ASSOC; 2179 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2180 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2181 2182 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2183 beacon_loss_count * bss_conf->beacon_int)); 2184 2185 sdata->u.mgd.associated = cbss; 2186 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2187 2188 ieee80211_check_rate_mask(sdata); 2189 2190 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2191 2192 if (sdata->vif.p2p || 2193 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2194 const struct cfg80211_bss_ies *ies; 2195 2196 rcu_read_lock(); 2197 ies = rcu_dereference(cbss->ies); 2198 if (ies) { 2199 int ret; 2200 2201 ret = cfg80211_get_p2p_attr( 2202 ies->data, ies->len, 2203 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2204 (u8 *) &bss_conf->p2p_noa_attr, 2205 sizeof(bss_conf->p2p_noa_attr)); 2206 if (ret >= 2) { 2207 sdata->u.mgd.p2p_noa_index = 2208 bss_conf->p2p_noa_attr.index; 2209 bss_info_changed |= BSS_CHANGED_P2P_PS; 2210 } 2211 } 2212 rcu_read_unlock(); 2213 } 2214 2215 /* just to be sure */ 2216 ieee80211_stop_poll(sdata); 2217 2218 ieee80211_led_assoc(local, 1); 2219 2220 if (sdata->u.mgd.have_beacon) { 2221 /* 2222 * If the AP is buggy we may get here with no DTIM period 2223 * known, so assume it's 1 which is the only safe assumption 2224 * in that case, although if the TIM IE is broken powersave 2225 * probably just won't work at all. 2226 */ 2227 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2228 bss_conf->beacon_rate = bss->beacon_rate; 2229 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2230 } else { 2231 bss_conf->beacon_rate = NULL; 2232 bss_conf->dtim_period = 0; 2233 } 2234 2235 bss_conf->assoc = 1; 2236 2237 /* Tell the driver to monitor connection quality (if supported) */ 2238 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2239 bss_conf->cqm_rssi_thold) 2240 bss_info_changed |= BSS_CHANGED_CQM; 2241 2242 /* Enable ARP filtering */ 2243 if (bss_conf->arp_addr_cnt) 2244 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2245 2246 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2247 2248 mutex_lock(&local->iflist_mtx); 2249 ieee80211_recalc_ps(local); 2250 mutex_unlock(&local->iflist_mtx); 2251 2252 ieee80211_recalc_smps(sdata); 2253 ieee80211_recalc_ps_vif(sdata); 2254 2255 netif_carrier_on(sdata->dev); 2256 } 2257 2258 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2259 u16 stype, u16 reason, bool tx, 2260 u8 *frame_buf) 2261 { 2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2263 struct ieee80211_local *local = sdata->local; 2264 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2265 u32 changed = 0; 2266 struct ieee80211_prep_tx_info info = { 2267 .subtype = stype, 2268 }; 2269 2270 sdata_assert_lock(sdata); 2271 2272 if (WARN_ON_ONCE(tx && !frame_buf)) 2273 return; 2274 2275 if (WARN_ON(!ifmgd->associated)) 2276 return; 2277 2278 ieee80211_stop_poll(sdata); 2279 2280 ifmgd->associated = NULL; 2281 netif_carrier_off(sdata->dev); 2282 2283 /* 2284 * if we want to get out of ps before disassoc (why?) we have 2285 * to do it before sending disassoc, as otherwise the null-packet 2286 * won't be valid. 2287 */ 2288 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2289 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2290 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2291 } 2292 local->ps_sdata = NULL; 2293 2294 /* disable per-vif ps */ 2295 ieee80211_recalc_ps_vif(sdata); 2296 2297 /* make sure ongoing transmission finishes */ 2298 synchronize_net(); 2299 2300 /* 2301 * drop any frame before deauth/disassoc, this can be data or 2302 * management frame. Since we are disconnecting, we should not 2303 * insist sending these frames which can take time and delay 2304 * the disconnection and possible the roaming. 2305 */ 2306 if (tx) 2307 ieee80211_flush_queues(local, sdata, true); 2308 2309 /* deauthenticate/disassociate now */ 2310 if (tx || frame_buf) { 2311 /* 2312 * In multi channel scenarios guarantee that the virtual 2313 * interface is granted immediate airtime to transmit the 2314 * deauthentication frame by calling mgd_prepare_tx, if the 2315 * driver requested so. 2316 */ 2317 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2318 !ifmgd->have_beacon) { 2319 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2320 } 2321 2322 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2323 ifmgd->bssid, stype, reason, 2324 tx, frame_buf); 2325 } 2326 2327 /* flush out frame - make sure the deauth was actually sent */ 2328 if (tx) 2329 ieee80211_flush_queues(local, sdata, false); 2330 2331 drv_mgd_complete_tx(sdata->local, sdata, &info); 2332 2333 /* clear bssid only after building the needed mgmt frames */ 2334 eth_zero_addr(ifmgd->bssid); 2335 2336 sdata->vif.bss_conf.ssid_len = 0; 2337 2338 /* remove AP and TDLS peers */ 2339 sta_info_flush(sdata); 2340 2341 /* finally reset all BSS / config parameters */ 2342 changed |= ieee80211_reset_erp_info(sdata); 2343 2344 ieee80211_led_assoc(local, 0); 2345 changed |= BSS_CHANGED_ASSOC; 2346 sdata->vif.bss_conf.assoc = false; 2347 2348 ifmgd->p2p_noa_index = -1; 2349 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2350 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2351 2352 /* on the next assoc, re-program HT/VHT parameters */ 2353 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2354 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2355 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2356 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2357 2358 /* reset MU-MIMO ownership and group data */ 2359 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2360 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2361 memset(sdata->vif.bss_conf.mu_group.position, 0, 2362 sizeof(sdata->vif.bss_conf.mu_group.position)); 2363 changed |= BSS_CHANGED_MU_GROUPS; 2364 sdata->vif.mu_mimo_owner = false; 2365 2366 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2367 2368 del_timer_sync(&local->dynamic_ps_timer); 2369 cancel_work_sync(&local->dynamic_ps_enable_work); 2370 2371 /* Disable ARP filtering */ 2372 if (sdata->vif.bss_conf.arp_addr_cnt) 2373 changed |= BSS_CHANGED_ARP_FILTER; 2374 2375 sdata->vif.bss_conf.qos = false; 2376 changed |= BSS_CHANGED_QOS; 2377 2378 /* The BSSID (not really interesting) and HT changed */ 2379 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2380 ieee80211_bss_info_change_notify(sdata, changed); 2381 2382 /* disassociated - set to defaults now */ 2383 ieee80211_set_wmm_default(sdata, false, false); 2384 2385 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2386 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2387 del_timer_sync(&sdata->u.mgd.timer); 2388 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2389 2390 sdata->vif.bss_conf.dtim_period = 0; 2391 sdata->vif.bss_conf.beacon_rate = NULL; 2392 2393 ifmgd->have_beacon = false; 2394 2395 ifmgd->flags = 0; 2396 mutex_lock(&local->mtx); 2397 ieee80211_vif_release_channel(sdata); 2398 2399 sdata->vif.csa_active = false; 2400 ifmgd->csa_waiting_bcn = false; 2401 ifmgd->csa_ignored_same_chan = false; 2402 if (sdata->csa_block_tx) { 2403 ieee80211_wake_vif_queues(local, sdata, 2404 IEEE80211_QUEUE_STOP_REASON_CSA); 2405 sdata->csa_block_tx = false; 2406 } 2407 mutex_unlock(&local->mtx); 2408 2409 /* existing TX TSPEC sessions no longer exist */ 2410 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2411 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2412 2413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2414 2415 bss_conf->pwr_reduction = 0; 2416 bss_conf->tx_pwr_env_num = 0; 2417 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2418 } 2419 2420 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2421 { 2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2423 struct ieee80211_local *local = sdata->local; 2424 2425 mutex_lock(&local->mtx); 2426 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2427 goto out; 2428 2429 __ieee80211_stop_poll(sdata); 2430 2431 mutex_lock(&local->iflist_mtx); 2432 ieee80211_recalc_ps(local); 2433 mutex_unlock(&local->iflist_mtx); 2434 2435 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2436 goto out; 2437 2438 /* 2439 * We've received a probe response, but are not sure whether 2440 * we have or will be receiving any beacons or data, so let's 2441 * schedule the timers again, just in case. 2442 */ 2443 ieee80211_sta_reset_beacon_monitor(sdata); 2444 2445 mod_timer(&ifmgd->conn_mon_timer, 2446 round_jiffies_up(jiffies + 2447 IEEE80211_CONNECTION_IDLE_TIME)); 2448 out: 2449 mutex_unlock(&local->mtx); 2450 } 2451 2452 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2453 struct ieee80211_hdr *hdr, 2454 u16 tx_time) 2455 { 2456 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2457 u16 tid; 2458 int ac; 2459 struct ieee80211_sta_tx_tspec *tx_tspec; 2460 unsigned long now = jiffies; 2461 2462 if (!ieee80211_is_data_qos(hdr->frame_control)) 2463 return; 2464 2465 tid = ieee80211_get_tid(hdr); 2466 ac = ieee80211_ac_from_tid(tid); 2467 tx_tspec = &ifmgd->tx_tspec[ac]; 2468 2469 if (likely(!tx_tspec->admitted_time)) 2470 return; 2471 2472 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2473 tx_tspec->consumed_tx_time = 0; 2474 tx_tspec->time_slice_start = now; 2475 2476 if (tx_tspec->downgraded) { 2477 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2478 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2479 } 2480 } 2481 2482 if (tx_tspec->downgraded) 2483 return; 2484 2485 tx_tspec->consumed_tx_time += tx_time; 2486 2487 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2488 tx_tspec->downgraded = true; 2489 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2490 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2491 } 2492 } 2493 2494 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2495 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2496 { 2497 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2498 2499 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2500 !sdata->u.mgd.probe_send_count) 2501 return; 2502 2503 if (ack) 2504 sdata->u.mgd.probe_send_count = 0; 2505 else 2506 sdata->u.mgd.nullfunc_failed = true; 2507 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2508 } 2509 2510 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2511 const u8 *src, const u8 *dst, 2512 const u8 *ssid, size_t ssid_len, 2513 struct ieee80211_channel *channel) 2514 { 2515 struct sk_buff *skb; 2516 2517 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2518 ssid, ssid_len, NULL, 0, 2519 IEEE80211_PROBE_FLAG_DIRECTED); 2520 if (skb) 2521 ieee80211_tx_skb(sdata, skb); 2522 } 2523 2524 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2525 { 2526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2527 const struct element *ssid; 2528 u8 *dst = ifmgd->associated->bssid; 2529 u8 unicast_limit = max(1, max_probe_tries - 3); 2530 struct sta_info *sta; 2531 2532 /* 2533 * Try sending broadcast probe requests for the last three 2534 * probe requests after the first ones failed since some 2535 * buggy APs only support broadcast probe requests. 2536 */ 2537 if (ifmgd->probe_send_count >= unicast_limit) 2538 dst = NULL; 2539 2540 /* 2541 * When the hardware reports an accurate Tx ACK status, it's 2542 * better to send a nullfunc frame instead of a probe request, 2543 * as it will kick us off the AP quickly if we aren't associated 2544 * anymore. The timeout will be reset if the frame is ACKed by 2545 * the AP. 2546 */ 2547 ifmgd->probe_send_count++; 2548 2549 if (dst) { 2550 mutex_lock(&sdata->local->sta_mtx); 2551 sta = sta_info_get(sdata, dst); 2552 if (!WARN_ON(!sta)) 2553 ieee80211_check_fast_rx(sta); 2554 mutex_unlock(&sdata->local->sta_mtx); 2555 } 2556 2557 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2558 ifmgd->nullfunc_failed = false; 2559 ieee80211_send_nullfunc(sdata->local, sdata, false); 2560 } else { 2561 int ssid_len; 2562 2563 rcu_read_lock(); 2564 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); 2565 if (WARN_ON_ONCE(ssid == NULL)) 2566 ssid_len = 0; 2567 else 2568 ssid_len = ssid->datalen; 2569 2570 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2571 ssid->data, ssid_len, 2572 ifmgd->associated->channel); 2573 rcu_read_unlock(); 2574 } 2575 2576 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2577 run_again(sdata, ifmgd->probe_timeout); 2578 } 2579 2580 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2581 bool beacon) 2582 { 2583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2584 bool already = false; 2585 2586 if (!ieee80211_sdata_running(sdata)) 2587 return; 2588 2589 sdata_lock(sdata); 2590 2591 if (!ifmgd->associated) 2592 goto out; 2593 2594 mutex_lock(&sdata->local->mtx); 2595 2596 if (sdata->local->tmp_channel || sdata->local->scanning) { 2597 mutex_unlock(&sdata->local->mtx); 2598 goto out; 2599 } 2600 2601 if (sdata->local->suspending) { 2602 /* reschedule after resume */ 2603 mutex_unlock(&sdata->local->mtx); 2604 ieee80211_reset_ap_probe(sdata); 2605 goto out; 2606 } 2607 2608 if (beacon) { 2609 mlme_dbg_ratelimited(sdata, 2610 "detected beacon loss from AP (missed %d beacons) - probing\n", 2611 beacon_loss_count); 2612 2613 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2614 } 2615 2616 /* 2617 * The driver/our work has already reported this event or the 2618 * connection monitoring has kicked in and we have already sent 2619 * a probe request. Or maybe the AP died and the driver keeps 2620 * reporting until we disassociate... 2621 * 2622 * In either case we have to ignore the current call to this 2623 * function (except for setting the correct probe reason bit) 2624 * because otherwise we would reset the timer every time and 2625 * never check whether we received a probe response! 2626 */ 2627 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2628 already = true; 2629 2630 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2631 2632 mutex_unlock(&sdata->local->mtx); 2633 2634 if (already) 2635 goto out; 2636 2637 mutex_lock(&sdata->local->iflist_mtx); 2638 ieee80211_recalc_ps(sdata->local); 2639 mutex_unlock(&sdata->local->iflist_mtx); 2640 2641 ifmgd->probe_send_count = 0; 2642 ieee80211_mgd_probe_ap_send(sdata); 2643 out: 2644 sdata_unlock(sdata); 2645 } 2646 2647 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2648 struct ieee80211_vif *vif) 2649 { 2650 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2652 struct cfg80211_bss *cbss; 2653 struct sk_buff *skb; 2654 const struct element *ssid; 2655 int ssid_len; 2656 2657 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2658 return NULL; 2659 2660 sdata_assert_lock(sdata); 2661 2662 if (ifmgd->associated) 2663 cbss = ifmgd->associated; 2664 else if (ifmgd->auth_data) 2665 cbss = ifmgd->auth_data->bss; 2666 else if (ifmgd->assoc_data) 2667 cbss = ifmgd->assoc_data->bss; 2668 else 2669 return NULL; 2670 2671 rcu_read_lock(); 2672 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2673 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2674 "invalid SSID element (len=%d)", 2675 ssid ? ssid->datalen : -1)) 2676 ssid_len = 0; 2677 else 2678 ssid_len = ssid->datalen; 2679 2680 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2681 (u32) -1, cbss->channel, 2682 ssid->data, ssid_len, 2683 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2684 rcu_read_unlock(); 2685 2686 return skb; 2687 } 2688 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2689 2690 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2691 const u8 *buf, size_t len, bool tx, 2692 u16 reason, bool reconnect) 2693 { 2694 struct ieee80211_event event = { 2695 .type = MLME_EVENT, 2696 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2697 .u.mlme.reason = reason, 2698 }; 2699 2700 if (tx) 2701 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2702 else 2703 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2704 2705 drv_event_callback(sdata->local, sdata, &event); 2706 } 2707 2708 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2709 { 2710 struct ieee80211_local *local = sdata->local; 2711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2712 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2713 bool tx; 2714 2715 sdata_lock(sdata); 2716 if (!ifmgd->associated) { 2717 sdata_unlock(sdata); 2718 return; 2719 } 2720 2721 tx = !sdata->csa_block_tx; 2722 2723 if (!ifmgd->driver_disconnect) { 2724 /* 2725 * AP is probably out of range (or not reachable for another 2726 * reason) so remove the bss struct for that AP. 2727 */ 2728 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2729 } 2730 2731 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2732 ifmgd->driver_disconnect ? 2733 WLAN_REASON_DEAUTH_LEAVING : 2734 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2735 tx, frame_buf); 2736 mutex_lock(&local->mtx); 2737 sdata->vif.csa_active = false; 2738 ifmgd->csa_waiting_bcn = false; 2739 if (sdata->csa_block_tx) { 2740 ieee80211_wake_vif_queues(local, sdata, 2741 IEEE80211_QUEUE_STOP_REASON_CSA); 2742 sdata->csa_block_tx = false; 2743 } 2744 mutex_unlock(&local->mtx); 2745 2746 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2747 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2748 ifmgd->reconnect); 2749 ifmgd->reconnect = false; 2750 2751 sdata_unlock(sdata); 2752 } 2753 2754 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2755 { 2756 struct ieee80211_sub_if_data *sdata = 2757 container_of(work, struct ieee80211_sub_if_data, 2758 u.mgd.beacon_connection_loss_work); 2759 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2760 2761 if (ifmgd->associated) 2762 ifmgd->beacon_loss_count++; 2763 2764 if (ifmgd->connection_loss) { 2765 sdata_info(sdata, "Connection to AP %pM lost\n", 2766 ifmgd->bssid); 2767 __ieee80211_disconnect(sdata); 2768 ifmgd->connection_loss = false; 2769 } else if (ifmgd->driver_disconnect) { 2770 sdata_info(sdata, 2771 "Driver requested disconnection from AP %pM\n", 2772 ifmgd->bssid); 2773 __ieee80211_disconnect(sdata); 2774 ifmgd->driver_disconnect = false; 2775 } else { 2776 ieee80211_mgd_probe_ap(sdata, true); 2777 } 2778 } 2779 2780 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2781 { 2782 struct ieee80211_sub_if_data *sdata = 2783 container_of(work, struct ieee80211_sub_if_data, 2784 u.mgd.csa_connection_drop_work); 2785 2786 __ieee80211_disconnect(sdata); 2787 } 2788 2789 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2790 { 2791 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2792 struct ieee80211_hw *hw = &sdata->local->hw; 2793 2794 trace_api_beacon_loss(sdata); 2795 2796 sdata->u.mgd.connection_loss = false; 2797 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2798 } 2799 EXPORT_SYMBOL(ieee80211_beacon_loss); 2800 2801 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2802 { 2803 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2804 struct ieee80211_hw *hw = &sdata->local->hw; 2805 2806 trace_api_connection_loss(sdata); 2807 2808 sdata->u.mgd.connection_loss = true; 2809 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2810 } 2811 EXPORT_SYMBOL(ieee80211_connection_loss); 2812 2813 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2814 { 2815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2816 struct ieee80211_hw *hw = &sdata->local->hw; 2817 2818 trace_api_disconnect(sdata, reconnect); 2819 2820 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2821 return; 2822 2823 sdata->u.mgd.driver_disconnect = true; 2824 sdata->u.mgd.reconnect = reconnect; 2825 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2826 } 2827 EXPORT_SYMBOL(ieee80211_disconnect); 2828 2829 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2830 bool assoc) 2831 { 2832 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2833 2834 sdata_assert_lock(sdata); 2835 2836 if (!assoc) { 2837 /* 2838 * we are not authenticated yet, the only timer that could be 2839 * running is the timeout for the authentication response which 2840 * which is not relevant anymore. 2841 */ 2842 del_timer_sync(&sdata->u.mgd.timer); 2843 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2844 2845 eth_zero_addr(sdata->u.mgd.bssid); 2846 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2847 sdata->u.mgd.flags = 0; 2848 mutex_lock(&sdata->local->mtx); 2849 ieee80211_vif_release_channel(sdata); 2850 mutex_unlock(&sdata->local->mtx); 2851 } 2852 2853 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2854 kfree(auth_data); 2855 sdata->u.mgd.auth_data = NULL; 2856 } 2857 2858 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2859 bool assoc, bool abandon) 2860 { 2861 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2862 2863 sdata_assert_lock(sdata); 2864 2865 if (!assoc) { 2866 /* 2867 * we are not associated yet, the only timer that could be 2868 * running is the timeout for the association response which 2869 * which is not relevant anymore. 2870 */ 2871 del_timer_sync(&sdata->u.mgd.timer); 2872 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2873 2874 eth_zero_addr(sdata->u.mgd.bssid); 2875 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2876 sdata->u.mgd.flags = 0; 2877 sdata->vif.mu_mimo_owner = false; 2878 2879 mutex_lock(&sdata->local->mtx); 2880 ieee80211_vif_release_channel(sdata); 2881 mutex_unlock(&sdata->local->mtx); 2882 2883 if (abandon) 2884 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2885 } 2886 2887 kfree(assoc_data); 2888 sdata->u.mgd.assoc_data = NULL; 2889 } 2890 2891 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2892 struct ieee80211_mgmt *mgmt, size_t len) 2893 { 2894 struct ieee80211_local *local = sdata->local; 2895 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2896 const struct element *challenge; 2897 u8 *pos; 2898 u32 tx_flags = 0; 2899 struct ieee80211_prep_tx_info info = { 2900 .subtype = IEEE80211_STYPE_AUTH, 2901 }; 2902 2903 pos = mgmt->u.auth.variable; 2904 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2905 len - (pos - (u8 *)mgmt)); 2906 if (!challenge) 2907 return; 2908 auth_data->expected_transaction = 4; 2909 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2910 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2911 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2912 IEEE80211_TX_INTFL_MLME_CONN_TX; 2913 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2914 (void *)challenge, 2915 challenge->datalen + sizeof(*challenge), 2916 auth_data->bss->bssid, auth_data->bss->bssid, 2917 auth_data->key, auth_data->key_len, 2918 auth_data->key_idx, tx_flags); 2919 } 2920 2921 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2922 const u8 *bssid) 2923 { 2924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2925 struct sta_info *sta; 2926 bool result = true; 2927 2928 sdata_info(sdata, "authenticated\n"); 2929 ifmgd->auth_data->done = true; 2930 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2931 ifmgd->auth_data->timeout_started = true; 2932 run_again(sdata, ifmgd->auth_data->timeout); 2933 2934 /* move station state to auth */ 2935 mutex_lock(&sdata->local->sta_mtx); 2936 sta = sta_info_get(sdata, bssid); 2937 if (!sta) { 2938 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2939 result = false; 2940 goto out; 2941 } 2942 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2943 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2944 result = false; 2945 goto out; 2946 } 2947 2948 out: 2949 mutex_unlock(&sdata->local->sta_mtx); 2950 return result; 2951 } 2952 2953 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2954 struct ieee80211_mgmt *mgmt, size_t len) 2955 { 2956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2957 u8 bssid[ETH_ALEN]; 2958 u16 auth_alg, auth_transaction, status_code; 2959 struct ieee80211_event event = { 2960 .type = MLME_EVENT, 2961 .u.mlme.data = AUTH_EVENT, 2962 }; 2963 struct ieee80211_prep_tx_info info = { 2964 .subtype = IEEE80211_STYPE_AUTH, 2965 }; 2966 2967 sdata_assert_lock(sdata); 2968 2969 if (len < 24 + 6) 2970 return; 2971 2972 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2973 return; 2974 2975 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2976 2977 if (!ether_addr_equal(bssid, mgmt->bssid)) 2978 return; 2979 2980 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2981 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2982 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2983 2984 if (auth_alg != ifmgd->auth_data->algorithm || 2985 (auth_alg != WLAN_AUTH_SAE && 2986 auth_transaction != ifmgd->auth_data->expected_transaction) || 2987 (auth_alg == WLAN_AUTH_SAE && 2988 (auth_transaction < ifmgd->auth_data->expected_transaction || 2989 auth_transaction > 2))) { 2990 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2991 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2992 auth_transaction, 2993 ifmgd->auth_data->expected_transaction); 2994 goto notify_driver; 2995 } 2996 2997 if (status_code != WLAN_STATUS_SUCCESS) { 2998 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2999 3000 if (auth_alg == WLAN_AUTH_SAE && 3001 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3002 (auth_transaction == 1 && 3003 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3004 status_code == WLAN_STATUS_SAE_PK)))) 3005 goto notify_driver; 3006 3007 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3008 mgmt->sa, status_code); 3009 ieee80211_destroy_auth_data(sdata, false); 3010 event.u.mlme.status = MLME_DENIED; 3011 event.u.mlme.reason = status_code; 3012 drv_event_callback(sdata->local, sdata, &event); 3013 goto notify_driver; 3014 } 3015 3016 switch (ifmgd->auth_data->algorithm) { 3017 case WLAN_AUTH_OPEN: 3018 case WLAN_AUTH_LEAP: 3019 case WLAN_AUTH_FT: 3020 case WLAN_AUTH_SAE: 3021 case WLAN_AUTH_FILS_SK: 3022 case WLAN_AUTH_FILS_SK_PFS: 3023 case WLAN_AUTH_FILS_PK: 3024 break; 3025 case WLAN_AUTH_SHARED_KEY: 3026 if (ifmgd->auth_data->expected_transaction != 4) { 3027 ieee80211_auth_challenge(sdata, mgmt, len); 3028 /* need another frame */ 3029 return; 3030 } 3031 break; 3032 default: 3033 WARN_ONCE(1, "invalid auth alg %d", 3034 ifmgd->auth_data->algorithm); 3035 goto notify_driver; 3036 } 3037 3038 event.u.mlme.status = MLME_SUCCESS; 3039 info.success = 1; 3040 drv_event_callback(sdata->local, sdata, &event); 3041 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3042 (auth_transaction == 2 && 3043 ifmgd->auth_data->expected_transaction == 2)) { 3044 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3045 return; /* ignore frame -- wait for timeout */ 3046 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3047 auth_transaction == 2) { 3048 sdata_info(sdata, "SAE peer confirmed\n"); 3049 ifmgd->auth_data->peer_confirmed = true; 3050 } 3051 3052 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3053 notify_driver: 3054 drv_mgd_complete_tx(sdata->local, sdata, &info); 3055 } 3056 3057 #define case_WLAN(type) \ 3058 case WLAN_REASON_##type: return #type 3059 3060 const char *ieee80211_get_reason_code_string(u16 reason_code) 3061 { 3062 switch (reason_code) { 3063 case_WLAN(UNSPECIFIED); 3064 case_WLAN(PREV_AUTH_NOT_VALID); 3065 case_WLAN(DEAUTH_LEAVING); 3066 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3067 case_WLAN(DISASSOC_AP_BUSY); 3068 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3069 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3070 case_WLAN(DISASSOC_STA_HAS_LEFT); 3071 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3072 case_WLAN(DISASSOC_BAD_POWER); 3073 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3074 case_WLAN(INVALID_IE); 3075 case_WLAN(MIC_FAILURE); 3076 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3077 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3078 case_WLAN(IE_DIFFERENT); 3079 case_WLAN(INVALID_GROUP_CIPHER); 3080 case_WLAN(INVALID_PAIRWISE_CIPHER); 3081 case_WLAN(INVALID_AKMP); 3082 case_WLAN(UNSUPP_RSN_VERSION); 3083 case_WLAN(INVALID_RSN_IE_CAP); 3084 case_WLAN(IEEE8021X_FAILED); 3085 case_WLAN(CIPHER_SUITE_REJECTED); 3086 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3087 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3088 case_WLAN(DISASSOC_LOW_ACK); 3089 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3090 case_WLAN(QSTA_LEAVE_QBSS); 3091 case_WLAN(QSTA_NOT_USE); 3092 case_WLAN(QSTA_REQUIRE_SETUP); 3093 case_WLAN(QSTA_TIMEOUT); 3094 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3095 case_WLAN(MESH_PEER_CANCELED); 3096 case_WLAN(MESH_MAX_PEERS); 3097 case_WLAN(MESH_CONFIG); 3098 case_WLAN(MESH_CLOSE); 3099 case_WLAN(MESH_MAX_RETRIES); 3100 case_WLAN(MESH_CONFIRM_TIMEOUT); 3101 case_WLAN(MESH_INVALID_GTK); 3102 case_WLAN(MESH_INCONSISTENT_PARAM); 3103 case_WLAN(MESH_INVALID_SECURITY); 3104 case_WLAN(MESH_PATH_ERROR); 3105 case_WLAN(MESH_PATH_NOFORWARD); 3106 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3107 case_WLAN(MAC_EXISTS_IN_MBSS); 3108 case_WLAN(MESH_CHAN_REGULATORY); 3109 case_WLAN(MESH_CHAN); 3110 default: return "<unknown>"; 3111 } 3112 } 3113 3114 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3115 struct ieee80211_mgmt *mgmt, size_t len) 3116 { 3117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3118 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3119 3120 sdata_assert_lock(sdata); 3121 3122 if (len < 24 + 2) 3123 return; 3124 3125 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3126 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3127 return; 3128 } 3129 3130 if (ifmgd->associated && 3131 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3132 const u8 *bssid = ifmgd->associated->bssid; 3133 3134 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3135 bssid, reason_code, 3136 ieee80211_get_reason_code_string(reason_code)); 3137 3138 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3139 3140 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3141 reason_code, false); 3142 return; 3143 } 3144 3145 if (ifmgd->assoc_data && 3146 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3147 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3148 3149 sdata_info(sdata, 3150 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3151 bssid, reason_code, 3152 ieee80211_get_reason_code_string(reason_code)); 3153 3154 ieee80211_destroy_assoc_data(sdata, false, true); 3155 3156 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3157 return; 3158 } 3159 } 3160 3161 3162 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3163 struct ieee80211_mgmt *mgmt, size_t len) 3164 { 3165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3166 u16 reason_code; 3167 3168 sdata_assert_lock(sdata); 3169 3170 if (len < 24 + 2) 3171 return; 3172 3173 if (!ifmgd->associated || 3174 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3175 return; 3176 3177 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3178 3179 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3180 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3181 return; 3182 } 3183 3184 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3185 mgmt->sa, reason_code, 3186 ieee80211_get_reason_code_string(reason_code)); 3187 3188 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3189 3190 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3191 false); 3192 } 3193 3194 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3195 u8 *supp_rates, unsigned int supp_rates_len, 3196 u32 *rates, u32 *basic_rates, 3197 bool *have_higher_than_11mbit, 3198 int *min_rate, int *min_rate_index, 3199 int shift) 3200 { 3201 int i, j; 3202 3203 for (i = 0; i < supp_rates_len; i++) { 3204 int rate = supp_rates[i] & 0x7f; 3205 bool is_basic = !!(supp_rates[i] & 0x80); 3206 3207 if ((rate * 5 * (1 << shift)) > 110) 3208 *have_higher_than_11mbit = true; 3209 3210 /* 3211 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3212 * since they're not rates. 3213 * 3214 * Note: Even though the membership selector and the basic 3215 * rate flag share the same bit, they are not exactly 3216 * the same. 3217 */ 3218 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3219 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3220 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3221 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3222 continue; 3223 3224 for (j = 0; j < sband->n_bitrates; j++) { 3225 struct ieee80211_rate *br; 3226 int brate; 3227 3228 br = &sband->bitrates[j]; 3229 3230 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3231 if (brate == rate) { 3232 *rates |= BIT(j); 3233 if (is_basic) 3234 *basic_rates |= BIT(j); 3235 if ((rate * 5) < *min_rate) { 3236 *min_rate = rate * 5; 3237 *min_rate_index = j; 3238 } 3239 break; 3240 } 3241 } 3242 } 3243 } 3244 3245 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3246 const struct ieee802_11_elems *elems) 3247 { 3248 if (elems->ext_capab_len < 10) 3249 return false; 3250 3251 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3252 return false; 3253 3254 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3255 IEEE80211_HE_MAC_CAP0_TWT_RES; 3256 } 3257 3258 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3259 struct sta_info *sta, 3260 struct ieee802_11_elems *elems) 3261 { 3262 bool twt = ieee80211_twt_req_supported(sta, elems); 3263 3264 if (sdata->vif.bss_conf.twt_requester != twt) { 3265 sdata->vif.bss_conf.twt_requester = twt; 3266 return BSS_CHANGED_TWT; 3267 } 3268 return 0; 3269 } 3270 3271 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3272 struct ieee80211_bss_conf *bss_conf, 3273 struct ieee80211_supported_band *sband, 3274 struct sta_info *sta) 3275 { 3276 const struct ieee80211_sta_he_cap *own_he_cap = 3277 ieee80211_get_he_iftype_cap(sband, 3278 ieee80211_vif_type_p2p(&sdata->vif)); 3279 3280 return bss_conf->he_support && 3281 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3282 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3283 own_he_cap && 3284 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3285 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3286 } 3287 3288 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3289 struct cfg80211_bss *cbss, 3290 struct ieee80211_mgmt *mgmt, size_t len, 3291 struct ieee802_11_elems *elems) 3292 { 3293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3294 struct ieee80211_local *local = sdata->local; 3295 struct ieee80211_supported_band *sband; 3296 struct sta_info *sta; 3297 u16 capab_info, aid; 3298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3299 const struct cfg80211_bss_ies *bss_ies = NULL; 3300 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3301 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3302 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3303 u32 changed = 0; 3304 u8 *pos; 3305 int err; 3306 bool ret; 3307 3308 /* AssocResp and ReassocResp have identical structure */ 3309 3310 pos = mgmt->u.assoc_resp.variable; 3311 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3312 if (is_s1g) { 3313 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3314 aid = 0; /* TODO */ 3315 } 3316 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3317 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3318 mgmt->bssid, assoc_data->bss->bssid); 3319 3320 if (!elems) 3321 return false; 3322 3323 if (elems->aid_resp) 3324 aid = le16_to_cpu(elems->aid_resp->aid); 3325 3326 /* 3327 * The 5 MSB of the AID field are reserved 3328 * (802.11-2016 9.4.1.8 AID field) 3329 */ 3330 aid &= 0x7ff; 3331 3332 ifmgd->broken_ap = false; 3333 3334 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3335 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3336 aid); 3337 aid = 0; 3338 ifmgd->broken_ap = true; 3339 } 3340 3341 if (!is_s1g && !elems->supp_rates) { 3342 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3343 ret = false; 3344 goto out; 3345 } 3346 3347 sdata->vif.bss_conf.aid = aid; 3348 ifmgd->tdls_chan_switch_prohibited = 3349 elems->ext_capab && elems->ext_capab_len >= 5 && 3350 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3351 3352 /* 3353 * Some APs are erroneously not including some information in their 3354 * (re)association response frames. Try to recover by using the data 3355 * from the beacon or probe response. This seems to afflict mobile 3356 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3357 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3358 */ 3359 if (!is_6ghz && 3360 ((assoc_data->wmm && !elems->wmm_param) || 3361 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3362 (!elems->ht_cap_elem || !elems->ht_operation)) || 3363 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3364 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3365 const struct cfg80211_bss_ies *ies; 3366 struct ieee802_11_elems *bss_elems; 3367 3368 rcu_read_lock(); 3369 ies = rcu_dereference(cbss->ies); 3370 if (ies) 3371 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3372 GFP_ATOMIC); 3373 rcu_read_unlock(); 3374 if (!bss_ies) { 3375 ret = false; 3376 goto out; 3377 } 3378 3379 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3380 false, mgmt->bssid, 3381 assoc_data->bss->bssid); 3382 if (!bss_elems) { 3383 ret = false; 3384 goto out; 3385 } 3386 3387 if (assoc_data->wmm && 3388 !elems->wmm_param && bss_elems->wmm_param) { 3389 elems->wmm_param = bss_elems->wmm_param; 3390 sdata_info(sdata, 3391 "AP bug: WMM param missing from AssocResp\n"); 3392 } 3393 3394 /* 3395 * Also check if we requested HT/VHT, otherwise the AP doesn't 3396 * have to include the IEs in the (re)association response. 3397 */ 3398 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3399 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3400 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3401 sdata_info(sdata, 3402 "AP bug: HT capability missing from AssocResp\n"); 3403 } 3404 if (!elems->ht_operation && bss_elems->ht_operation && 3405 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3406 elems->ht_operation = bss_elems->ht_operation; 3407 sdata_info(sdata, 3408 "AP bug: HT operation missing from AssocResp\n"); 3409 } 3410 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3411 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3412 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3413 sdata_info(sdata, 3414 "AP bug: VHT capa missing from AssocResp\n"); 3415 } 3416 if (!elems->vht_operation && bss_elems->vht_operation && 3417 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3418 elems->vht_operation = bss_elems->vht_operation; 3419 sdata_info(sdata, 3420 "AP bug: VHT operation missing from AssocResp\n"); 3421 } 3422 3423 kfree(bss_elems); 3424 } 3425 3426 /* 3427 * We previously checked these in the beacon/probe response, so 3428 * they should be present here. This is just a safety net. 3429 */ 3430 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3431 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3432 sdata_info(sdata, 3433 "HT AP is missing WMM params or HT capability/operation\n"); 3434 ret = false; 3435 goto out; 3436 } 3437 3438 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3439 (!elems->vht_cap_elem || !elems->vht_operation)) { 3440 sdata_info(sdata, 3441 "VHT AP is missing VHT capability/operation\n"); 3442 ret = false; 3443 goto out; 3444 } 3445 3446 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3447 !elems->he_6ghz_capa) { 3448 sdata_info(sdata, 3449 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3450 ret = false; 3451 goto out; 3452 } 3453 3454 mutex_lock(&sdata->local->sta_mtx); 3455 /* 3456 * station info was already allocated and inserted before 3457 * the association and should be available to us 3458 */ 3459 sta = sta_info_get(sdata, cbss->bssid); 3460 if (WARN_ON(!sta)) { 3461 mutex_unlock(&sdata->local->sta_mtx); 3462 ret = false; 3463 goto out; 3464 } 3465 3466 sband = ieee80211_get_sband(sdata); 3467 if (!sband) { 3468 mutex_unlock(&sdata->local->sta_mtx); 3469 ret = false; 3470 goto out; 3471 } 3472 3473 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3474 (!elems->he_cap || !elems->he_operation)) { 3475 mutex_unlock(&sdata->local->sta_mtx); 3476 sdata_info(sdata, 3477 "HE AP is missing HE capability/operation\n"); 3478 ret = false; 3479 goto out; 3480 } 3481 3482 /* Set up internal HT/VHT capabilities */ 3483 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3484 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3485 elems->ht_cap_elem, sta); 3486 3487 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3488 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3489 elems->vht_cap_elem, sta); 3490 3491 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3492 elems->he_cap) { 3493 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3494 elems->he_cap, 3495 elems->he_cap_len, 3496 elems->he_6ghz_capa, 3497 sta); 3498 3499 bss_conf->he_support = sta->sta.he_cap.has_he; 3500 if (elems->rsnx && elems->rsnx_len && 3501 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3502 wiphy_ext_feature_isset(local->hw.wiphy, 3503 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3504 bss_conf->twt_protected = true; 3505 else 3506 bss_conf->twt_protected = false; 3507 3508 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3509 } else { 3510 bss_conf->he_support = false; 3511 bss_conf->twt_requester = false; 3512 bss_conf->twt_protected = false; 3513 } 3514 3515 bss_conf->twt_broadcast = 3516 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3517 3518 if (bss_conf->he_support) { 3519 bss_conf->he_bss_color.color = 3520 le32_get_bits(elems->he_operation->he_oper_params, 3521 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3522 bss_conf->he_bss_color.partial = 3523 le32_get_bits(elems->he_operation->he_oper_params, 3524 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3525 bss_conf->he_bss_color.enabled = 3526 !le32_get_bits(elems->he_operation->he_oper_params, 3527 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3528 3529 if (bss_conf->he_bss_color.enabled) 3530 changed |= BSS_CHANGED_HE_BSS_COLOR; 3531 3532 bss_conf->htc_trig_based_pkt_ext = 3533 le32_get_bits(elems->he_operation->he_oper_params, 3534 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3535 bss_conf->frame_time_rts_th = 3536 le32_get_bits(elems->he_operation->he_oper_params, 3537 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3538 3539 bss_conf->uora_exists = !!elems->uora_element; 3540 if (elems->uora_element) 3541 bss_conf->uora_ocw_range = elems->uora_element[0]; 3542 3543 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3544 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3545 /* TODO: OPEN: what happens if BSS color disable is set? */ 3546 } 3547 3548 if (cbss->transmitted_bss) { 3549 bss_conf->nontransmitted = true; 3550 ether_addr_copy(bss_conf->transmitter_bssid, 3551 cbss->transmitted_bss->bssid); 3552 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3553 bss_conf->bssid_index = cbss->bssid_index; 3554 } 3555 3556 /* 3557 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3558 * in their association response, so ignore that data for our own 3559 * configuration. If it changed since the last beacon, we'll get the 3560 * next beacon and update then. 3561 */ 3562 3563 /* 3564 * If an operating mode notification IE is present, override the 3565 * NSS calculation (that would be done in rate_control_rate_init()) 3566 * and use the # of streams from that element. 3567 */ 3568 if (elems->opmode_notif && 3569 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3570 u8 nss; 3571 3572 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3573 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3574 nss += 1; 3575 sta->sta.rx_nss = nss; 3576 } 3577 3578 rate_control_rate_init(sta); 3579 3580 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3581 set_sta_flag(sta, WLAN_STA_MFP); 3582 sta->sta.mfp = true; 3583 } else { 3584 sta->sta.mfp = false; 3585 } 3586 3587 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3588 local->hw.queues >= IEEE80211_NUM_ACS; 3589 3590 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3591 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3592 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3593 if (err) { 3594 sdata_info(sdata, 3595 "failed to move station %pM to desired state\n", 3596 sta->sta.addr); 3597 WARN_ON(__sta_info_destroy(sta)); 3598 mutex_unlock(&sdata->local->sta_mtx); 3599 ret = false; 3600 goto out; 3601 } 3602 3603 if (sdata->wdev.use_4addr) 3604 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3605 3606 mutex_unlock(&sdata->local->sta_mtx); 3607 3608 /* 3609 * Always handle WMM once after association regardless 3610 * of the first value the AP uses. Setting -1 here has 3611 * that effect because the AP values is an unsigned 3612 * 4-bit value. 3613 */ 3614 ifmgd->wmm_last_param_set = -1; 3615 ifmgd->mu_edca_last_param_set = -1; 3616 3617 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3618 ieee80211_set_wmm_default(sdata, false, false); 3619 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3620 elems->wmm_param_len, 3621 elems->mu_edca_param_set)) { 3622 /* still enable QoS since we might have HT/VHT */ 3623 ieee80211_set_wmm_default(sdata, false, true); 3624 /* set the disable-WMM flag in this case to disable 3625 * tracking WMM parameter changes in the beacon if 3626 * the parameters weren't actually valid. Doing so 3627 * avoids changing parameters very strangely when 3628 * the AP is going back and forth between valid and 3629 * invalid parameters. 3630 */ 3631 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3632 } 3633 changed |= BSS_CHANGED_QOS; 3634 3635 if (elems->max_idle_period_ie) { 3636 bss_conf->max_idle_period = 3637 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3638 bss_conf->protected_keep_alive = 3639 !!(elems->max_idle_period_ie->idle_options & 3640 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3641 changed |= BSS_CHANGED_KEEP_ALIVE; 3642 } else { 3643 bss_conf->max_idle_period = 0; 3644 bss_conf->protected_keep_alive = false; 3645 } 3646 3647 /* set assoc capability (AID was already set earlier), 3648 * ieee80211_set_associated() will tell the driver */ 3649 bss_conf->assoc_capability = capab_info; 3650 ieee80211_set_associated(sdata, cbss, changed); 3651 3652 /* 3653 * If we're using 4-addr mode, let the AP know that we're 3654 * doing so, so that it can create the STA VLAN on its side 3655 */ 3656 if (ifmgd->use_4addr) 3657 ieee80211_send_4addr_nullfunc(local, sdata); 3658 3659 /* 3660 * Start timer to probe the connection to the AP now. 3661 * Also start the timer that will detect beacon loss. 3662 */ 3663 ieee80211_sta_reset_beacon_monitor(sdata); 3664 ieee80211_sta_reset_conn_monitor(sdata); 3665 3666 ret = true; 3667 out: 3668 kfree(elems); 3669 kfree(bss_ies); 3670 return ret; 3671 } 3672 3673 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3674 struct ieee80211_mgmt *mgmt, 3675 size_t len) 3676 { 3677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3678 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3679 u16 capab_info, status_code, aid; 3680 struct ieee802_11_elems *elems; 3681 int ac, uapsd_queues = -1; 3682 u8 *pos; 3683 bool reassoc; 3684 struct cfg80211_bss *cbss; 3685 struct ieee80211_event event = { 3686 .type = MLME_EVENT, 3687 .u.mlme.data = ASSOC_EVENT, 3688 }; 3689 struct ieee80211_prep_tx_info info = {}; 3690 3691 sdata_assert_lock(sdata); 3692 3693 if (!assoc_data) 3694 return; 3695 3696 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3697 return; 3698 3699 cbss = assoc_data->bss; 3700 3701 /* 3702 * AssocResp and ReassocResp have identical structure, so process both 3703 * of them in this function. 3704 */ 3705 3706 if (len < 24 + 6) 3707 return; 3708 3709 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3710 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3711 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3712 pos = mgmt->u.assoc_resp.variable; 3713 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3714 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3715 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3716 aid = 0; /* TODO */ 3717 } 3718 3719 /* 3720 * Note: this may not be perfect, AP might misbehave - if 3721 * anyone needs to rely on perfect complete notification 3722 * with the exact right subtype, then we need to track what 3723 * we actually transmitted. 3724 */ 3725 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3726 IEEE80211_STYPE_ASSOC_REQ; 3727 3728 sdata_info(sdata, 3729 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3730 reassoc ? "Rea" : "A", mgmt->sa, 3731 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3732 3733 if (assoc_data->fils_kek_len && 3734 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3735 return; 3736 3737 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3738 mgmt->bssid, assoc_data->bss->bssid); 3739 if (!elems) 3740 goto notify_driver; 3741 3742 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3743 elems->timeout_int && 3744 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3745 u32 tu, ms; 3746 3747 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss, 3748 le32_to_cpu(elems->timeout_int->value)); 3749 3750 tu = le32_to_cpu(elems->timeout_int->value); 3751 ms = tu * 1024 / 1000; 3752 sdata_info(sdata, 3753 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3754 mgmt->sa, tu, ms); 3755 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3756 assoc_data->timeout_started = true; 3757 if (ms > IEEE80211_ASSOC_TIMEOUT) 3758 run_again(sdata, assoc_data->timeout); 3759 goto notify_driver; 3760 } 3761 3762 if (status_code != WLAN_STATUS_SUCCESS) { 3763 sdata_info(sdata, "%pM denied association (code=%d)\n", 3764 mgmt->sa, status_code); 3765 ieee80211_destroy_assoc_data(sdata, false, false); 3766 event.u.mlme.status = MLME_DENIED; 3767 event.u.mlme.reason = status_code; 3768 drv_event_callback(sdata->local, sdata, &event); 3769 } else { 3770 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3771 /* oops -- internal error -- send timeout for now */ 3772 ieee80211_destroy_assoc_data(sdata, false, false); 3773 cfg80211_assoc_timeout(sdata->dev, cbss); 3774 goto notify_driver; 3775 } 3776 event.u.mlme.status = MLME_SUCCESS; 3777 drv_event_callback(sdata->local, sdata, &event); 3778 sdata_info(sdata, "associated\n"); 3779 3780 /* 3781 * destroy assoc_data afterwards, as otherwise an idle 3782 * recalc after assoc_data is NULL but before associated 3783 * is set can cause the interface to go idle 3784 */ 3785 ieee80211_destroy_assoc_data(sdata, true, false); 3786 3787 /* get uapsd queues configuration */ 3788 uapsd_queues = 0; 3789 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3790 if (sdata->tx_conf[ac].uapsd) 3791 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3792 3793 info.success = 1; 3794 } 3795 3796 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3797 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3798 notify_driver: 3799 drv_mgd_complete_tx(sdata->local, sdata, &info); 3800 kfree(elems); 3801 } 3802 3803 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3804 struct ieee80211_mgmt *mgmt, size_t len, 3805 struct ieee80211_rx_status *rx_status) 3806 { 3807 struct ieee80211_local *local = sdata->local; 3808 struct ieee80211_bss *bss; 3809 struct ieee80211_channel *channel; 3810 3811 sdata_assert_lock(sdata); 3812 3813 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3814 ieee80211_rx_status_to_khz(rx_status)); 3815 if (!channel) 3816 return; 3817 3818 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3819 if (bss) { 3820 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3821 ieee80211_rx_bss_put(local, bss); 3822 } 3823 } 3824 3825 3826 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3827 struct sk_buff *skb) 3828 { 3829 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3830 struct ieee80211_if_managed *ifmgd; 3831 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3832 struct ieee80211_channel *channel; 3833 size_t baselen, len = skb->len; 3834 3835 ifmgd = &sdata->u.mgd; 3836 3837 sdata_assert_lock(sdata); 3838 3839 /* 3840 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3841 * "If a 6 GHz AP receives a Probe Request frame and responds with 3842 * a Probe Response frame [..], the Address 1 field of the Probe 3843 * Response frame shall be set to the broadcast address [..]" 3844 * So, on 6GHz band we should also accept broadcast responses. 3845 */ 3846 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3847 rx_status->freq); 3848 if (!channel) 3849 return; 3850 3851 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3852 (channel->band != NL80211_BAND_6GHZ || 3853 !is_broadcast_ether_addr(mgmt->da))) 3854 return; /* ignore ProbeResp to foreign address */ 3855 3856 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3857 if (baselen > len) 3858 return; 3859 3860 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3861 3862 if (ifmgd->associated && 3863 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3864 ieee80211_reset_ap_probe(sdata); 3865 } 3866 3867 /* 3868 * This is the canonical list of information elements we care about, 3869 * the filter code also gives us all changes to the Microsoft OUI 3870 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3871 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3872 * changes to requested client power. 3873 * 3874 * We implement beacon filtering in software since that means we can 3875 * avoid processing the frame here and in cfg80211, and userspace 3876 * will not be able to tell whether the hardware supports it or not. 3877 * 3878 * XXX: This list needs to be dynamic -- userspace needs to be able to 3879 * add items it requires. It also needs to be able to tell us to 3880 * look out for other vendor IEs. 3881 */ 3882 static const u64 care_about_ies = 3883 (1ULL << WLAN_EID_COUNTRY) | 3884 (1ULL << WLAN_EID_ERP_INFO) | 3885 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3886 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3887 (1ULL << WLAN_EID_HT_CAPABILITY) | 3888 (1ULL << WLAN_EID_HT_OPERATION) | 3889 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3890 3891 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3892 struct ieee80211_if_managed *ifmgd, 3893 struct ieee80211_bss_conf *bss_conf, 3894 struct ieee80211_local *local, 3895 struct ieee80211_rx_status *rx_status) 3896 { 3897 /* Track average RSSI from the Beacon frames of the current AP */ 3898 3899 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3900 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3901 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3902 ifmgd->last_cqm_event_signal = 0; 3903 ifmgd->count_beacon_signal = 1; 3904 ifmgd->last_ave_beacon_signal = 0; 3905 } else { 3906 ifmgd->count_beacon_signal++; 3907 } 3908 3909 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3910 3911 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3912 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3913 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3914 int last_sig = ifmgd->last_ave_beacon_signal; 3915 struct ieee80211_event event = { 3916 .type = RSSI_EVENT, 3917 }; 3918 3919 /* 3920 * if signal crosses either of the boundaries, invoke callback 3921 * with appropriate parameters 3922 */ 3923 if (sig > ifmgd->rssi_max_thold && 3924 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3925 ifmgd->last_ave_beacon_signal = sig; 3926 event.u.rssi.data = RSSI_EVENT_HIGH; 3927 drv_event_callback(local, sdata, &event); 3928 } else if (sig < ifmgd->rssi_min_thold && 3929 (last_sig >= ifmgd->rssi_max_thold || 3930 last_sig == 0)) { 3931 ifmgd->last_ave_beacon_signal = sig; 3932 event.u.rssi.data = RSSI_EVENT_LOW; 3933 drv_event_callback(local, sdata, &event); 3934 } 3935 } 3936 3937 if (bss_conf->cqm_rssi_thold && 3938 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3939 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3940 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3941 int last_event = ifmgd->last_cqm_event_signal; 3942 int thold = bss_conf->cqm_rssi_thold; 3943 int hyst = bss_conf->cqm_rssi_hyst; 3944 3945 if (sig < thold && 3946 (last_event == 0 || sig < last_event - hyst)) { 3947 ifmgd->last_cqm_event_signal = sig; 3948 ieee80211_cqm_rssi_notify( 3949 &sdata->vif, 3950 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3951 sig, GFP_KERNEL); 3952 } else if (sig > thold && 3953 (last_event == 0 || sig > last_event + hyst)) { 3954 ifmgd->last_cqm_event_signal = sig; 3955 ieee80211_cqm_rssi_notify( 3956 &sdata->vif, 3957 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3958 sig, GFP_KERNEL); 3959 } 3960 } 3961 3962 if (bss_conf->cqm_rssi_low && 3963 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3964 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3965 int last_event = ifmgd->last_cqm_event_signal; 3966 int low = bss_conf->cqm_rssi_low; 3967 int high = bss_conf->cqm_rssi_high; 3968 3969 if (sig < low && 3970 (last_event == 0 || last_event >= low)) { 3971 ifmgd->last_cqm_event_signal = sig; 3972 ieee80211_cqm_rssi_notify( 3973 &sdata->vif, 3974 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3975 sig, GFP_KERNEL); 3976 } else if (sig > high && 3977 (last_event == 0 || last_event <= high)) { 3978 ifmgd->last_cqm_event_signal = sig; 3979 ieee80211_cqm_rssi_notify( 3980 &sdata->vif, 3981 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3982 sig, GFP_KERNEL); 3983 } 3984 } 3985 } 3986 3987 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3988 struct cfg80211_bss *bss) 3989 { 3990 if (ether_addr_equal(tx_bssid, bss->bssid)) 3991 return true; 3992 if (!bss->transmitted_bss) 3993 return false; 3994 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 3995 } 3996 3997 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3998 struct ieee80211_hdr *hdr, size_t len, 3999 struct ieee80211_rx_status *rx_status) 4000 { 4001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4002 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 4003 struct ieee80211_mgmt *mgmt = (void *) hdr; 4004 size_t baselen; 4005 struct ieee802_11_elems *elems; 4006 struct ieee80211_local *local = sdata->local; 4007 struct ieee80211_chanctx_conf *chanctx_conf; 4008 struct ieee80211_channel *chan; 4009 struct sta_info *sta; 4010 u32 changed = 0; 4011 bool erp_valid; 4012 u8 erp_value = 0; 4013 u32 ncrc = 0; 4014 u8 *bssid, *variable = mgmt->u.beacon.variable; 4015 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4016 4017 sdata_assert_lock(sdata); 4018 4019 /* Process beacon from the current BSS */ 4020 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4021 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4022 struct ieee80211_ext *ext = (void *) mgmt; 4023 4024 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4025 variable = ext->u.s1g_short_beacon.variable; 4026 else 4027 variable = ext->u.s1g_beacon.variable; 4028 } 4029 4030 baselen = (u8 *) variable - (u8 *) mgmt; 4031 if (baselen > len) 4032 return; 4033 4034 rcu_read_lock(); 4035 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4036 if (!chanctx_conf) { 4037 rcu_read_unlock(); 4038 return; 4039 } 4040 4041 if (ieee80211_rx_status_to_khz(rx_status) != 4042 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4043 rcu_read_unlock(); 4044 return; 4045 } 4046 chan = chanctx_conf->def.chan; 4047 rcu_read_unlock(); 4048 4049 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4050 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4051 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4052 bssid, 4053 ifmgd->assoc_data->bss->bssid); 4054 if (!elems) 4055 return; 4056 4057 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4058 4059 if (elems->dtim_period) 4060 ifmgd->dtim_period = elems->dtim_period; 4061 ifmgd->have_beacon = true; 4062 ifmgd->assoc_data->need_beacon = false; 4063 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4064 sdata->vif.bss_conf.sync_tsf = 4065 le64_to_cpu(mgmt->u.beacon.timestamp); 4066 sdata->vif.bss_conf.sync_device_ts = 4067 rx_status->device_timestamp; 4068 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4069 } 4070 4071 if (elems->mbssid_config_ie) 4072 bss_conf->profile_periodicity = 4073 elems->mbssid_config_ie->profile_periodicity; 4074 else 4075 bss_conf->profile_periodicity = 0; 4076 4077 if (elems->ext_capab_len >= 11 && 4078 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4079 bss_conf->ema_ap = true; 4080 else 4081 bss_conf->ema_ap = false; 4082 4083 /* continue assoc process */ 4084 ifmgd->assoc_data->timeout = jiffies; 4085 ifmgd->assoc_data->timeout_started = true; 4086 run_again(sdata, ifmgd->assoc_data->timeout); 4087 kfree(elems); 4088 return; 4089 } 4090 4091 if (!ifmgd->associated || 4092 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4093 return; 4094 bssid = ifmgd->associated->bssid; 4095 4096 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4097 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4098 local, rx_status); 4099 4100 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4101 mlme_dbg_ratelimited(sdata, 4102 "cancelling AP probe due to a received beacon\n"); 4103 ieee80211_reset_ap_probe(sdata); 4104 } 4105 4106 /* 4107 * Push the beacon loss detection into the future since 4108 * we are processing a beacon from the AP just now. 4109 */ 4110 ieee80211_sta_reset_beacon_monitor(sdata); 4111 4112 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4113 * element (which carries the beacon interval). Don't forget to add a 4114 * bit to care_about_ies[] above if mac80211 is interested in a 4115 * changing S1G element. 4116 */ 4117 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4118 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4119 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4120 false, care_about_ies, ncrc, 4121 mgmt->bssid, bssid); 4122 if (!elems) 4123 return; 4124 ncrc = elems->crc; 4125 4126 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4127 ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { 4128 if (local->hw.conf.dynamic_ps_timeout > 0) { 4129 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4130 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4131 ieee80211_hw_config(local, 4132 IEEE80211_CONF_CHANGE_PS); 4133 } 4134 ieee80211_send_nullfunc(local, sdata, false); 4135 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4136 local->pspolling = true; 4137 4138 /* 4139 * Here is assumed that the driver will be 4140 * able to send ps-poll frame and receive a 4141 * response even though power save mode is 4142 * enabled, but some drivers might require 4143 * to disable power save here. This needs 4144 * to be investigated. 4145 */ 4146 ieee80211_send_pspoll(local, sdata); 4147 } 4148 } 4149 4150 if (sdata->vif.p2p || 4151 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4152 struct ieee80211_p2p_noa_attr noa = {}; 4153 int ret; 4154 4155 ret = cfg80211_get_p2p_attr(variable, 4156 len - baselen, 4157 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4158 (u8 *) &noa, sizeof(noa)); 4159 if (ret >= 2) { 4160 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4161 /* valid noa_attr and index changed */ 4162 sdata->u.mgd.p2p_noa_index = noa.index; 4163 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4164 changed |= BSS_CHANGED_P2P_PS; 4165 /* 4166 * make sure we update all information, the CRC 4167 * mechanism doesn't look at P2P attributes. 4168 */ 4169 ifmgd->beacon_crc_valid = false; 4170 } 4171 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4172 /* noa_attr not found and we had valid noa_attr before */ 4173 sdata->u.mgd.p2p_noa_index = -1; 4174 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4175 changed |= BSS_CHANGED_P2P_PS; 4176 ifmgd->beacon_crc_valid = false; 4177 } 4178 } 4179 4180 if (ifmgd->csa_waiting_bcn) 4181 ieee80211_chswitch_post_beacon(sdata); 4182 4183 /* 4184 * Update beacon timing and dtim count on every beacon appearance. This 4185 * will allow the driver to use the most updated values. Do it before 4186 * comparing this one with last received beacon. 4187 * IMPORTANT: These parameters would possibly be out of sync by the time 4188 * the driver will use them. The synchronized view is currently 4189 * guaranteed only in certain callbacks. 4190 */ 4191 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4192 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4193 sdata->vif.bss_conf.sync_tsf = 4194 le64_to_cpu(mgmt->u.beacon.timestamp); 4195 sdata->vif.bss_conf.sync_device_ts = 4196 rx_status->device_timestamp; 4197 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4198 } 4199 4200 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4201 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4202 goto free; 4203 ifmgd->beacon_crc = ncrc; 4204 ifmgd->beacon_crc_valid = true; 4205 4206 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4207 4208 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4209 rx_status->device_timestamp, 4210 elems, true); 4211 4212 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4213 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4214 elems->wmm_param_len, 4215 elems->mu_edca_param_set)) 4216 changed |= BSS_CHANGED_QOS; 4217 4218 /* 4219 * If we haven't had a beacon before, tell the driver about the 4220 * DTIM period (and beacon timing if desired) now. 4221 */ 4222 if (!ifmgd->have_beacon) { 4223 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4224 bss_conf->dtim_period = elems->dtim_period ?: 1; 4225 4226 changed |= BSS_CHANGED_BEACON_INFO; 4227 ifmgd->have_beacon = true; 4228 4229 mutex_lock(&local->iflist_mtx); 4230 ieee80211_recalc_ps(local); 4231 mutex_unlock(&local->iflist_mtx); 4232 4233 ieee80211_recalc_ps_vif(sdata); 4234 } 4235 4236 if (elems->erp_info) { 4237 erp_valid = true; 4238 erp_value = elems->erp_info[0]; 4239 } else { 4240 erp_valid = false; 4241 } 4242 4243 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4244 changed |= ieee80211_handle_bss_capability(sdata, 4245 le16_to_cpu(mgmt->u.beacon.capab_info), 4246 erp_valid, erp_value); 4247 4248 mutex_lock(&local->sta_mtx); 4249 sta = sta_info_get(sdata, bssid); 4250 4251 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4252 4253 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4254 elems->vht_cap_elem, elems->ht_operation, 4255 elems->vht_operation, elems->he_operation, 4256 elems->s1g_oper, bssid, &changed)) { 4257 mutex_unlock(&local->sta_mtx); 4258 sdata_info(sdata, 4259 "failed to follow AP %pM bandwidth change, disconnect\n", 4260 bssid); 4261 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4262 WLAN_REASON_DEAUTH_LEAVING, 4263 true, deauth_buf); 4264 ieee80211_report_disconnect(sdata, deauth_buf, 4265 sizeof(deauth_buf), true, 4266 WLAN_REASON_DEAUTH_LEAVING, 4267 false); 4268 goto free; 4269 } 4270 4271 if (sta && elems->opmode_notif) 4272 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, 4273 rx_status->band); 4274 mutex_unlock(&local->sta_mtx); 4275 4276 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4277 elems->country_elem, 4278 elems->country_elem_len, 4279 elems->pwr_constr_elem, 4280 elems->cisco_dtpc_elem); 4281 4282 ieee80211_bss_info_change_notify(sdata, changed); 4283 free: 4284 kfree(elems); 4285 } 4286 4287 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4288 struct sk_buff *skb) 4289 { 4290 struct ieee80211_rx_status *rx_status; 4291 struct ieee80211_hdr *hdr; 4292 u16 fc; 4293 4294 rx_status = (struct ieee80211_rx_status *) skb->cb; 4295 hdr = (struct ieee80211_hdr *) skb->data; 4296 fc = le16_to_cpu(hdr->frame_control); 4297 4298 sdata_lock(sdata); 4299 switch (fc & IEEE80211_FCTL_STYPE) { 4300 case IEEE80211_STYPE_S1G_BEACON: 4301 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4302 break; 4303 } 4304 sdata_unlock(sdata); 4305 } 4306 4307 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4308 struct sk_buff *skb) 4309 { 4310 struct ieee80211_rx_status *rx_status; 4311 struct ieee80211_mgmt *mgmt; 4312 u16 fc; 4313 int ies_len; 4314 4315 rx_status = (struct ieee80211_rx_status *) skb->cb; 4316 mgmt = (struct ieee80211_mgmt *) skb->data; 4317 fc = le16_to_cpu(mgmt->frame_control); 4318 4319 sdata_lock(sdata); 4320 4321 switch (fc & IEEE80211_FCTL_STYPE) { 4322 case IEEE80211_STYPE_BEACON: 4323 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4324 skb->len, rx_status); 4325 break; 4326 case IEEE80211_STYPE_PROBE_RESP: 4327 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4328 break; 4329 case IEEE80211_STYPE_AUTH: 4330 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4331 break; 4332 case IEEE80211_STYPE_DEAUTH: 4333 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4334 break; 4335 case IEEE80211_STYPE_DISASSOC: 4336 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4337 break; 4338 case IEEE80211_STYPE_ASSOC_RESP: 4339 case IEEE80211_STYPE_REASSOC_RESP: 4340 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4341 break; 4342 case IEEE80211_STYPE_ACTION: 4343 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4344 struct ieee802_11_elems *elems; 4345 4346 ies_len = skb->len - 4347 offsetof(struct ieee80211_mgmt, 4348 u.action.u.chan_switch.variable); 4349 4350 if (ies_len < 0) 4351 break; 4352 4353 /* CSA IE cannot be overridden, no need for BSSID */ 4354 elems = ieee802_11_parse_elems( 4355 mgmt->u.action.u.chan_switch.variable, 4356 ies_len, true, mgmt->bssid, NULL); 4357 4358 if (elems && !elems->parse_error) 4359 ieee80211_sta_process_chanswitch(sdata, 4360 rx_status->mactime, 4361 rx_status->device_timestamp, 4362 elems, false); 4363 kfree(elems); 4364 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4365 struct ieee802_11_elems *elems; 4366 4367 ies_len = skb->len - 4368 offsetof(struct ieee80211_mgmt, 4369 u.action.u.ext_chan_switch.variable); 4370 4371 if (ies_len < 0) 4372 break; 4373 4374 /* 4375 * extended CSA IE can't be overridden, no need for 4376 * BSSID 4377 */ 4378 elems = ieee802_11_parse_elems( 4379 mgmt->u.action.u.ext_chan_switch.variable, 4380 ies_len, true, mgmt->bssid, NULL); 4381 4382 if (elems && !elems->parse_error) { 4383 /* for the handling code pretend it was an IE */ 4384 elems->ext_chansw_ie = 4385 &mgmt->u.action.u.ext_chan_switch.data; 4386 4387 ieee80211_sta_process_chanswitch(sdata, 4388 rx_status->mactime, 4389 rx_status->device_timestamp, 4390 elems, false); 4391 } 4392 4393 kfree(elems); 4394 } 4395 break; 4396 } 4397 sdata_unlock(sdata); 4398 } 4399 4400 static void ieee80211_sta_timer(struct timer_list *t) 4401 { 4402 struct ieee80211_sub_if_data *sdata = 4403 from_timer(sdata, t, u.mgd.timer); 4404 4405 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4406 } 4407 4408 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4409 u8 *bssid, u8 reason, bool tx) 4410 { 4411 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4412 4413 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4414 tx, frame_buf); 4415 4416 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4417 reason, false); 4418 } 4419 4420 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4421 { 4422 struct ieee80211_local *local = sdata->local; 4423 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4424 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4425 u32 tx_flags = 0; 4426 u16 trans = 1; 4427 u16 status = 0; 4428 struct ieee80211_prep_tx_info info = { 4429 .subtype = IEEE80211_STYPE_AUTH, 4430 }; 4431 4432 sdata_assert_lock(sdata); 4433 4434 if (WARN_ON_ONCE(!auth_data)) 4435 return -EINVAL; 4436 4437 auth_data->tries++; 4438 4439 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4440 sdata_info(sdata, "authentication with %pM timed out\n", 4441 auth_data->bss->bssid); 4442 4443 /* 4444 * Most likely AP is not in the range so remove the 4445 * bss struct for that AP. 4446 */ 4447 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4448 4449 return -ETIMEDOUT; 4450 } 4451 4452 if (auth_data->algorithm == WLAN_AUTH_SAE) 4453 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4454 4455 drv_mgd_prepare_tx(local, sdata, &info); 4456 4457 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4458 auth_data->bss->bssid, auth_data->tries, 4459 IEEE80211_AUTH_MAX_TRIES); 4460 4461 auth_data->expected_transaction = 2; 4462 4463 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4464 trans = auth_data->sae_trans; 4465 status = auth_data->sae_status; 4466 auth_data->expected_transaction = trans; 4467 } 4468 4469 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4470 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4471 IEEE80211_TX_INTFL_MLME_CONN_TX; 4472 4473 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4474 auth_data->data, auth_data->data_len, 4475 auth_data->bss->bssid, 4476 auth_data->bss->bssid, NULL, 0, 0, 4477 tx_flags); 4478 4479 if (tx_flags == 0) { 4480 if (auth_data->algorithm == WLAN_AUTH_SAE) 4481 auth_data->timeout = jiffies + 4482 IEEE80211_AUTH_TIMEOUT_SAE; 4483 else 4484 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4485 } else { 4486 auth_data->timeout = 4487 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4488 } 4489 4490 auth_data->timeout_started = true; 4491 run_again(sdata, auth_data->timeout); 4492 4493 return 0; 4494 } 4495 4496 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4497 { 4498 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4499 struct ieee80211_local *local = sdata->local; 4500 4501 sdata_assert_lock(sdata); 4502 4503 assoc_data->tries++; 4504 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4505 sdata_info(sdata, "association with %pM timed out\n", 4506 assoc_data->bss->bssid); 4507 4508 /* 4509 * Most likely AP is not in the range so remove the 4510 * bss struct for that AP. 4511 */ 4512 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4513 4514 return -ETIMEDOUT; 4515 } 4516 4517 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4518 assoc_data->bss->bssid, assoc_data->tries, 4519 IEEE80211_ASSOC_MAX_TRIES); 4520 ieee80211_send_assoc(sdata); 4521 4522 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4523 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4524 assoc_data->timeout_started = true; 4525 run_again(sdata, assoc_data->timeout); 4526 } else { 4527 assoc_data->timeout = 4528 round_jiffies_up(jiffies + 4529 IEEE80211_ASSOC_TIMEOUT_LONG); 4530 assoc_data->timeout_started = true; 4531 run_again(sdata, assoc_data->timeout); 4532 } 4533 4534 return 0; 4535 } 4536 4537 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4538 __le16 fc, bool acked) 4539 { 4540 struct ieee80211_local *local = sdata->local; 4541 4542 sdata->u.mgd.status_fc = fc; 4543 sdata->u.mgd.status_acked = acked; 4544 sdata->u.mgd.status_received = true; 4545 4546 ieee80211_queue_work(&local->hw, &sdata->work); 4547 } 4548 4549 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4550 { 4551 struct ieee80211_local *local = sdata->local; 4552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4553 4554 sdata_lock(sdata); 4555 4556 if (ifmgd->status_received) { 4557 __le16 fc = ifmgd->status_fc; 4558 bool status_acked = ifmgd->status_acked; 4559 4560 ifmgd->status_received = false; 4561 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4562 if (status_acked) { 4563 if (ifmgd->auth_data->algorithm == 4564 WLAN_AUTH_SAE) 4565 ifmgd->auth_data->timeout = 4566 jiffies + 4567 IEEE80211_AUTH_TIMEOUT_SAE; 4568 else 4569 ifmgd->auth_data->timeout = 4570 jiffies + 4571 IEEE80211_AUTH_TIMEOUT_SHORT; 4572 run_again(sdata, ifmgd->auth_data->timeout); 4573 } else { 4574 ifmgd->auth_data->timeout = jiffies - 1; 4575 } 4576 ifmgd->auth_data->timeout_started = true; 4577 } else if (ifmgd->assoc_data && 4578 (ieee80211_is_assoc_req(fc) || 4579 ieee80211_is_reassoc_req(fc))) { 4580 if (status_acked) { 4581 ifmgd->assoc_data->timeout = 4582 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4583 run_again(sdata, ifmgd->assoc_data->timeout); 4584 } else { 4585 ifmgd->assoc_data->timeout = jiffies - 1; 4586 } 4587 ifmgd->assoc_data->timeout_started = true; 4588 } 4589 } 4590 4591 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4592 time_after(jiffies, ifmgd->auth_data->timeout)) { 4593 if (ifmgd->auth_data->done) { 4594 /* 4595 * ok ... we waited for assoc but userspace didn't, 4596 * so let's just kill the auth data 4597 */ 4598 ieee80211_destroy_auth_data(sdata, false); 4599 } else if (ieee80211_auth(sdata)) { 4600 u8 bssid[ETH_ALEN]; 4601 struct ieee80211_event event = { 4602 .type = MLME_EVENT, 4603 .u.mlme.data = AUTH_EVENT, 4604 .u.mlme.status = MLME_TIMEOUT, 4605 }; 4606 4607 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4608 4609 ieee80211_destroy_auth_data(sdata, false); 4610 4611 cfg80211_auth_timeout(sdata->dev, bssid); 4612 drv_event_callback(sdata->local, sdata, &event); 4613 } 4614 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4615 run_again(sdata, ifmgd->auth_data->timeout); 4616 4617 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4618 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4619 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4620 ieee80211_do_assoc(sdata)) { 4621 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4622 struct ieee80211_event event = { 4623 .type = MLME_EVENT, 4624 .u.mlme.data = ASSOC_EVENT, 4625 .u.mlme.status = MLME_TIMEOUT, 4626 }; 4627 4628 ieee80211_destroy_assoc_data(sdata, false, false); 4629 cfg80211_assoc_timeout(sdata->dev, bss); 4630 drv_event_callback(sdata->local, sdata, &event); 4631 } 4632 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4633 run_again(sdata, ifmgd->assoc_data->timeout); 4634 4635 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4636 ifmgd->associated) { 4637 u8 bssid[ETH_ALEN]; 4638 int max_tries; 4639 4640 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4641 4642 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4643 max_tries = max_nullfunc_tries; 4644 else 4645 max_tries = max_probe_tries; 4646 4647 /* ACK received for nullfunc probing frame */ 4648 if (!ifmgd->probe_send_count) 4649 ieee80211_reset_ap_probe(sdata); 4650 else if (ifmgd->nullfunc_failed) { 4651 if (ifmgd->probe_send_count < max_tries) { 4652 mlme_dbg(sdata, 4653 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4654 bssid, ifmgd->probe_send_count, 4655 max_tries); 4656 ieee80211_mgd_probe_ap_send(sdata); 4657 } else { 4658 mlme_dbg(sdata, 4659 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4660 bssid); 4661 ieee80211_sta_connection_lost(sdata, bssid, 4662 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4663 false); 4664 } 4665 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4666 run_again(sdata, ifmgd->probe_timeout); 4667 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4668 mlme_dbg(sdata, 4669 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4670 bssid, probe_wait_ms); 4671 ieee80211_sta_connection_lost(sdata, bssid, 4672 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4673 } else if (ifmgd->probe_send_count < max_tries) { 4674 mlme_dbg(sdata, 4675 "No probe response from AP %pM after %dms, try %d/%i\n", 4676 bssid, probe_wait_ms, 4677 ifmgd->probe_send_count, max_tries); 4678 ieee80211_mgd_probe_ap_send(sdata); 4679 } else { 4680 /* 4681 * We actually lost the connection ... or did we? 4682 * Let's make sure! 4683 */ 4684 mlme_dbg(sdata, 4685 "No probe response from AP %pM after %dms, disconnecting.\n", 4686 bssid, probe_wait_ms); 4687 4688 ieee80211_sta_connection_lost(sdata, bssid, 4689 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4690 } 4691 } 4692 4693 sdata_unlock(sdata); 4694 } 4695 4696 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4697 { 4698 struct ieee80211_sub_if_data *sdata = 4699 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4701 4702 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4703 return; 4704 4705 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4706 return; 4707 4708 sdata->u.mgd.connection_loss = false; 4709 ieee80211_queue_work(&sdata->local->hw, 4710 &sdata->u.mgd.beacon_connection_loss_work); 4711 } 4712 4713 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4714 { 4715 struct ieee80211_sub_if_data *sdata = 4716 from_timer(sdata, t, u.mgd.conn_mon_timer); 4717 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4718 struct ieee80211_local *local = sdata->local; 4719 struct sta_info *sta; 4720 unsigned long timeout; 4721 4722 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4723 return; 4724 4725 sta = sta_info_get(sdata, ifmgd->bssid); 4726 if (!sta) 4727 return; 4728 4729 timeout = sta->status_stats.last_ack; 4730 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4731 timeout = sta->rx_stats.last_rx; 4732 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4733 4734 /* If timeout is after now, then update timer to fire at 4735 * the later date, but do not actually probe at this time. 4736 */ 4737 if (time_is_after_jiffies(timeout)) { 4738 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4739 return; 4740 } 4741 4742 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4743 } 4744 4745 static void ieee80211_sta_monitor_work(struct work_struct *work) 4746 { 4747 struct ieee80211_sub_if_data *sdata = 4748 container_of(work, struct ieee80211_sub_if_data, 4749 u.mgd.monitor_work); 4750 4751 ieee80211_mgd_probe_ap(sdata, false); 4752 } 4753 4754 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4755 { 4756 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4757 __ieee80211_stop_poll(sdata); 4758 4759 /* let's probe the connection once */ 4760 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4761 ieee80211_queue_work(&sdata->local->hw, 4762 &sdata->u.mgd.monitor_work); 4763 } 4764 } 4765 4766 #ifdef CONFIG_PM 4767 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4768 { 4769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4770 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4771 4772 sdata_lock(sdata); 4773 4774 if (ifmgd->auth_data || ifmgd->assoc_data) { 4775 const u8 *bssid = ifmgd->auth_data ? 4776 ifmgd->auth_data->bss->bssid : 4777 ifmgd->assoc_data->bss->bssid; 4778 4779 /* 4780 * If we are trying to authenticate / associate while suspending, 4781 * cfg80211 won't know and won't actually abort those attempts, 4782 * thus we need to do that ourselves. 4783 */ 4784 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4785 IEEE80211_STYPE_DEAUTH, 4786 WLAN_REASON_DEAUTH_LEAVING, 4787 false, frame_buf); 4788 if (ifmgd->assoc_data) 4789 ieee80211_destroy_assoc_data(sdata, false, true); 4790 if (ifmgd->auth_data) 4791 ieee80211_destroy_auth_data(sdata, false); 4792 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4793 IEEE80211_DEAUTH_FRAME_LEN, 4794 false); 4795 } 4796 4797 /* This is a bit of a hack - we should find a better and more generic 4798 * solution to this. Normally when suspending, cfg80211 will in fact 4799 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4800 * auth (not so important) or assoc (this is the problem) process. 4801 * 4802 * As a consequence, it can happen that we are in the process of both 4803 * associating and suspending, and receive an association response 4804 * after cfg80211 has checked if it needs to disconnect, but before 4805 * we actually set the flag to drop incoming frames. This will then 4806 * cause the workqueue flush to process the association response in 4807 * the suspend, resulting in a successful association just before it 4808 * tries to remove the interface from the driver, which now though 4809 * has a channel context assigned ... this results in issues. 4810 * 4811 * To work around this (for now) simply deauth here again if we're 4812 * now connected. 4813 */ 4814 if (ifmgd->associated && !sdata->local->wowlan) { 4815 u8 bssid[ETH_ALEN]; 4816 struct cfg80211_deauth_request req = { 4817 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4818 .bssid = bssid, 4819 }; 4820 4821 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4822 ieee80211_mgd_deauth(sdata, &req); 4823 } 4824 4825 sdata_unlock(sdata); 4826 } 4827 4828 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4829 { 4830 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4831 4832 sdata_lock(sdata); 4833 if (!ifmgd->associated) { 4834 sdata_unlock(sdata); 4835 return; 4836 } 4837 4838 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4839 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4840 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4841 ieee80211_sta_connection_lost(sdata, 4842 ifmgd->associated->bssid, 4843 WLAN_REASON_UNSPECIFIED, 4844 true); 4845 sdata_unlock(sdata); 4846 return; 4847 } 4848 sdata_unlock(sdata); 4849 } 4850 #endif 4851 4852 /* interface setup */ 4853 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4854 { 4855 struct ieee80211_if_managed *ifmgd; 4856 4857 ifmgd = &sdata->u.mgd; 4858 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4859 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4860 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4861 ieee80211_beacon_connection_loss_work); 4862 INIT_WORK(&ifmgd->csa_connection_drop_work, 4863 ieee80211_csa_connection_drop_work); 4864 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4865 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4866 ieee80211_tdls_peer_del_work); 4867 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4868 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4869 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4870 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4871 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4872 ieee80211_sta_handle_tspec_ac_params_wk); 4873 4874 ifmgd->flags = 0; 4875 ifmgd->powersave = sdata->wdev.ps; 4876 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4877 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4878 ifmgd->p2p_noa_index = -1; 4879 4880 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4881 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4882 else 4883 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4884 4885 /* Setup TDLS data */ 4886 spin_lock_init(&ifmgd->teardown_lock); 4887 ifmgd->teardown_skb = NULL; 4888 ifmgd->orig_teardown_skb = NULL; 4889 } 4890 4891 /* scan finished notification */ 4892 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4893 { 4894 struct ieee80211_sub_if_data *sdata; 4895 4896 /* Restart STA timers */ 4897 rcu_read_lock(); 4898 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4899 if (ieee80211_sdata_running(sdata)) 4900 ieee80211_restart_sta_timer(sdata); 4901 } 4902 rcu_read_unlock(); 4903 } 4904 4905 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4906 struct cfg80211_bss *cbss) 4907 { 4908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4909 const struct element *ht_cap_elem, *vht_cap_elem; 4910 const struct ieee80211_ht_cap *ht_cap; 4911 const struct ieee80211_vht_cap *vht_cap; 4912 u8 chains = 1; 4913 4914 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4915 return chains; 4916 4917 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4918 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4919 ht_cap = (void *)ht_cap_elem->data; 4920 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4921 /* 4922 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4923 * "Tx Unequal Modulation Supported" fields. 4924 */ 4925 } 4926 4927 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4928 return chains; 4929 4930 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4931 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4932 u8 nss; 4933 u16 tx_mcs_map; 4934 4935 vht_cap = (void *)vht_cap_elem->data; 4936 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4937 for (nss = 8; nss > 0; nss--) { 4938 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4939 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4940 break; 4941 } 4942 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4943 chains = max(chains, nss); 4944 } 4945 4946 return chains; 4947 } 4948 4949 static bool 4950 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4951 struct ieee80211_supported_band *sband, 4952 const struct ieee80211_he_operation *he_op) 4953 { 4954 const struct ieee80211_sta_he_cap *sta_he_cap = 4955 ieee80211_get_he_iftype_cap(sband, 4956 ieee80211_vif_type_p2p(&sdata->vif)); 4957 u16 ap_min_req_set; 4958 int i; 4959 4960 if (!sta_he_cap || !he_op) 4961 return false; 4962 4963 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4964 4965 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4966 for (i = 0; i < 3; i++) { 4967 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4968 &sta_he_cap->he_mcs_nss_supp; 4969 u16 sta_mcs_map_rx = 4970 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4971 u16 sta_mcs_map_tx = 4972 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4973 u8 nss; 4974 bool verified = true; 4975 4976 /* 4977 * For each band there is a maximum of 8 spatial streams 4978 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4979 * of 2 bits per NSS (1-8), with the values defined in enum 4980 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4981 * capabilities aren't less than the AP's minimum requirements 4982 * for this HE BSS per SS. 4983 * It is enough to find one such band that meets the reqs. 4984 */ 4985 for (nss = 8; nss > 0; nss--) { 4986 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 4987 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 4988 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 4989 4990 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 4991 continue; 4992 4993 /* 4994 * Make sure the HE AP doesn't require MCSs that aren't 4995 * supported by the client 4996 */ 4997 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4998 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 4999 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 5000 verified = false; 5001 break; 5002 } 5003 } 5004 5005 if (verified) 5006 return true; 5007 } 5008 5009 /* If here, STA doesn't meet AP's HE min requirements */ 5010 return false; 5011 } 5012 5013 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5014 struct cfg80211_bss *cbss) 5015 { 5016 struct ieee80211_local *local = sdata->local; 5017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5018 const struct ieee80211_ht_cap *ht_cap = NULL; 5019 const struct ieee80211_ht_operation *ht_oper = NULL; 5020 const struct ieee80211_vht_operation *vht_oper = NULL; 5021 const struct ieee80211_he_operation *he_oper = NULL; 5022 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5023 struct ieee80211_supported_band *sband; 5024 struct cfg80211_chan_def chandef; 5025 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5026 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5027 struct ieee80211_bss *bss = (void *)cbss->priv; 5028 struct ieee802_11_elems *elems; 5029 const struct cfg80211_bss_ies *ies; 5030 int ret; 5031 u32 i; 5032 bool have_80mhz; 5033 5034 rcu_read_lock(); 5035 5036 ies = rcu_dereference(cbss->ies); 5037 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5038 NULL, NULL); 5039 if (!elems) { 5040 rcu_read_unlock(); 5041 return -ENOMEM; 5042 } 5043 5044 sband = local->hw.wiphy->bands[cbss->channel->band]; 5045 5046 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5047 IEEE80211_STA_DISABLE_80P80MHZ | 5048 IEEE80211_STA_DISABLE_160MHZ); 5049 5050 /* disable HT/VHT/HE if we don't support them */ 5051 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5052 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE\n"); 5053 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5054 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5055 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5056 } 5057 5058 if (!sband->vht_cap.vht_supported && is_5ghz) { 5059 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE\n"); 5060 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5061 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5062 } 5063 5064 if (!ieee80211_get_he_iftype_cap(sband, 5065 ieee80211_vif_type_p2p(&sdata->vif))) { 5066 mlme_dbg(sdata, "HE not supported, disabling it\n"); 5067 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5068 } 5069 5070 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5071 ht_oper = elems->ht_operation; 5072 ht_cap = elems->ht_cap_elem; 5073 5074 if (!ht_cap) { 5075 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5076 ht_oper = NULL; 5077 } 5078 } 5079 5080 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5081 vht_oper = elems->vht_operation; 5082 if (vht_oper && !ht_oper) { 5083 vht_oper = NULL; 5084 sdata_info(sdata, 5085 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5086 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5087 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5088 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5089 } 5090 5091 if (!elems->vht_cap_elem) { 5092 sdata_info(sdata, 5093 "bad VHT capabilities, disabling VHT\n"); 5094 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5095 vht_oper = NULL; 5096 } 5097 } 5098 5099 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5100 he_oper = elems->he_operation; 5101 5102 if (is_6ghz) { 5103 struct ieee80211_bss_conf *bss_conf; 5104 u8 i, j = 0; 5105 5106 bss_conf = &sdata->vif.bss_conf; 5107 5108 if (elems->pwr_constr_elem) 5109 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5110 5111 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5112 ARRAY_SIZE(elems->tx_pwr_env)); 5113 5114 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5115 if (elems->tx_pwr_env_len[i] > 5116 sizeof(bss_conf->tx_pwr_env[j])) 5117 continue; 5118 5119 bss_conf->tx_pwr_env_num++; 5120 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5121 elems->tx_pwr_env_len[i]); 5122 j++; 5123 } 5124 } 5125 5126 if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5127 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5128 } 5129 5130 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5131 have_80mhz = false; 5132 for (i = 0; i < sband->n_channels; i++) { 5133 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5134 IEEE80211_CHAN_NO_80MHZ)) 5135 continue; 5136 5137 have_80mhz = true; 5138 break; 5139 } 5140 5141 if (!have_80mhz) { 5142 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5143 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5144 } 5145 5146 if (sband->band == NL80211_BAND_S1GHZ) { 5147 s1g_oper = elems->s1g_oper; 5148 if (!s1g_oper) 5149 sdata_info(sdata, 5150 "AP missing S1G operation element?\n"); 5151 } 5152 5153 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5154 cbss->channel, 5155 bss->vht_cap_info, 5156 ht_oper, vht_oper, he_oper, 5157 s1g_oper, 5158 &chandef, false); 5159 5160 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5161 local->rx_chains); 5162 5163 rcu_read_unlock(); 5164 /* the element data was RCU protected so no longer valid anyway */ 5165 kfree(elems); 5166 elems = NULL; 5167 5168 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5169 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5170 return -EINVAL; 5171 } 5172 5173 /* will change later if needed */ 5174 sdata->smps_mode = IEEE80211_SMPS_OFF; 5175 5176 mutex_lock(&local->mtx); 5177 /* 5178 * If this fails (possibly due to channel context sharing 5179 * on incompatible channels, e.g. 80+80 and 160 sharing the 5180 * same control channel) try to use a smaller bandwidth. 5181 */ 5182 ret = ieee80211_vif_use_channel(sdata, &chandef, 5183 IEEE80211_CHANCTX_SHARED); 5184 5185 /* don't downgrade for 5 and 10 MHz channels, though. */ 5186 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5187 chandef.width == NL80211_CHAN_WIDTH_10) 5188 goto out; 5189 5190 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5191 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5192 ret = ieee80211_vif_use_channel(sdata, &chandef, 5193 IEEE80211_CHANCTX_SHARED); 5194 } 5195 out: 5196 mutex_unlock(&local->mtx); 5197 return ret; 5198 } 5199 5200 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5201 u8 *dtim_count, u8 *dtim_period) 5202 { 5203 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5204 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5205 ies->len); 5206 const struct ieee80211_tim_ie *tim = NULL; 5207 const struct ieee80211_bssid_index *idx; 5208 bool valid = tim_ie && tim_ie[1] >= 2; 5209 5210 if (valid) 5211 tim = (void *)(tim_ie + 2); 5212 5213 if (dtim_count) 5214 *dtim_count = valid ? tim->dtim_count : 0; 5215 5216 if (dtim_period) 5217 *dtim_period = valid ? tim->dtim_period : 0; 5218 5219 /* Check if value is overridden by non-transmitted profile */ 5220 if (!idx_ie || idx_ie[1] < 3) 5221 return valid; 5222 5223 idx = (void *)(idx_ie + 2); 5224 5225 if (dtim_count) 5226 *dtim_count = idx->dtim_count; 5227 5228 if (dtim_period) 5229 *dtim_period = idx->dtim_period; 5230 5231 return true; 5232 } 5233 5234 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5235 struct cfg80211_bss *cbss, bool assoc, 5236 bool override) 5237 { 5238 struct ieee80211_local *local = sdata->local; 5239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5240 struct ieee80211_bss *bss = (void *)cbss->priv; 5241 struct sta_info *new_sta = NULL; 5242 struct ieee80211_supported_band *sband; 5243 bool have_sta = false; 5244 int err; 5245 5246 sband = local->hw.wiphy->bands[cbss->channel->band]; 5247 5248 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5249 return -EINVAL; 5250 5251 /* If a reconfig is happening, bail out */ 5252 if (local->in_reconfig) 5253 return -EBUSY; 5254 5255 if (assoc) { 5256 rcu_read_lock(); 5257 have_sta = sta_info_get(sdata, cbss->bssid); 5258 rcu_read_unlock(); 5259 } 5260 5261 if (!have_sta) { 5262 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5263 if (!new_sta) 5264 return -ENOMEM; 5265 } 5266 5267 /* 5268 * Set up the information for the new channel before setting the 5269 * new channel. We can't - completely race-free - change the basic 5270 * rates bitmap and the channel (sband) that it refers to, but if 5271 * we set it up before we at least avoid calling into the driver's 5272 * bss_info_changed() method with invalid information (since we do 5273 * call that from changing the channel - only for IDLE and perhaps 5274 * some others, but ...). 5275 * 5276 * So to avoid that, just set up all the new information before the 5277 * channel, but tell the driver to apply it only afterwards, since 5278 * it might need the new channel for that. 5279 */ 5280 if (new_sta) { 5281 u32 rates = 0, basic_rates = 0; 5282 bool have_higher_than_11mbit = false; 5283 int min_rate = INT_MAX, min_rate_index = -1; 5284 const struct cfg80211_bss_ies *ies; 5285 int shift = ieee80211_vif_get_shift(&sdata->vif); 5286 5287 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5288 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5289 ieee80211_s1g_sta_rate_init(new_sta); 5290 goto skip_rates; 5291 } 5292 5293 ieee80211_get_rates(sband, bss->supp_rates, 5294 bss->supp_rates_len, 5295 &rates, &basic_rates, 5296 &have_higher_than_11mbit, 5297 &min_rate, &min_rate_index, 5298 shift); 5299 5300 /* 5301 * This used to be a workaround for basic rates missing 5302 * in the association response frame. Now that we no 5303 * longer use the basic rates from there, it probably 5304 * doesn't happen any more, but keep the workaround so 5305 * in case some *other* APs are buggy in different ways 5306 * we can connect -- with a warning. 5307 * Allow this workaround only in case the AP provided at least 5308 * one rate. 5309 */ 5310 if (min_rate_index < 0) { 5311 sdata_info(sdata, 5312 "No legacy rates in association response\n"); 5313 5314 sta_info_free(local, new_sta); 5315 return -EINVAL; 5316 } else if (!basic_rates) { 5317 sdata_info(sdata, 5318 "No basic rates, using min rate instead\n"); 5319 basic_rates = BIT(min_rate_index); 5320 } 5321 5322 if (rates) 5323 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5324 else 5325 sdata_info(sdata, 5326 "No rates found, keeping mandatory only\n"); 5327 5328 sdata->vif.bss_conf.basic_rates = basic_rates; 5329 5330 /* cf. IEEE 802.11 9.2.12 */ 5331 if (cbss->channel->band == NL80211_BAND_2GHZ && 5332 have_higher_than_11mbit) 5333 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5334 else 5335 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5336 5337 skip_rates: 5338 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5339 5340 /* set timing information */ 5341 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5342 rcu_read_lock(); 5343 ies = rcu_dereference(cbss->beacon_ies); 5344 if (ies) { 5345 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5346 sdata->vif.bss_conf.sync_device_ts = 5347 bss->device_ts_beacon; 5348 5349 ieee80211_get_dtim(ies, 5350 &sdata->vif.bss_conf.sync_dtim_count, 5351 NULL); 5352 } else if (!ieee80211_hw_check(&sdata->local->hw, 5353 TIMING_BEACON_ONLY)) { 5354 ies = rcu_dereference(cbss->proberesp_ies); 5355 /* must be non-NULL since beacon IEs were NULL */ 5356 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5357 sdata->vif.bss_conf.sync_device_ts = 5358 bss->device_ts_presp; 5359 sdata->vif.bss_conf.sync_dtim_count = 0; 5360 } else { 5361 sdata->vif.bss_conf.sync_tsf = 0; 5362 sdata->vif.bss_conf.sync_device_ts = 0; 5363 sdata->vif.bss_conf.sync_dtim_count = 0; 5364 } 5365 rcu_read_unlock(); 5366 } 5367 5368 if (new_sta || override) { 5369 err = ieee80211_prep_channel(sdata, cbss); 5370 if (err) { 5371 if (new_sta) 5372 sta_info_free(local, new_sta); 5373 return -EINVAL; 5374 } 5375 } 5376 5377 if (new_sta) { 5378 /* 5379 * tell driver about BSSID, basic rates and timing 5380 * this was set up above, before setting the channel 5381 */ 5382 ieee80211_bss_info_change_notify(sdata, 5383 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5384 BSS_CHANGED_BEACON_INT); 5385 5386 if (assoc) 5387 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5388 5389 err = sta_info_insert(new_sta); 5390 new_sta = NULL; 5391 if (err) { 5392 sdata_info(sdata, 5393 "failed to insert STA entry for the AP (error %d)\n", 5394 err); 5395 return err; 5396 } 5397 } else 5398 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5399 5400 /* Cancel scan to ensure that nothing interferes with connection */ 5401 if (local->scanning) 5402 ieee80211_scan_cancel(local); 5403 5404 return 0; 5405 } 5406 5407 /* config hooks */ 5408 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5409 struct cfg80211_auth_request *req) 5410 { 5411 struct ieee80211_local *local = sdata->local; 5412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5413 struct ieee80211_mgd_auth_data *auth_data; 5414 u16 auth_alg; 5415 int err; 5416 bool cont_auth; 5417 5418 /* prepare auth data structure */ 5419 5420 switch (req->auth_type) { 5421 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5422 auth_alg = WLAN_AUTH_OPEN; 5423 break; 5424 case NL80211_AUTHTYPE_SHARED_KEY: 5425 if (fips_enabled) 5426 return -EOPNOTSUPP; 5427 auth_alg = WLAN_AUTH_SHARED_KEY; 5428 break; 5429 case NL80211_AUTHTYPE_FT: 5430 auth_alg = WLAN_AUTH_FT; 5431 break; 5432 case NL80211_AUTHTYPE_NETWORK_EAP: 5433 auth_alg = WLAN_AUTH_LEAP; 5434 break; 5435 case NL80211_AUTHTYPE_SAE: 5436 auth_alg = WLAN_AUTH_SAE; 5437 break; 5438 case NL80211_AUTHTYPE_FILS_SK: 5439 auth_alg = WLAN_AUTH_FILS_SK; 5440 break; 5441 case NL80211_AUTHTYPE_FILS_SK_PFS: 5442 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5443 break; 5444 case NL80211_AUTHTYPE_FILS_PK: 5445 auth_alg = WLAN_AUTH_FILS_PK; 5446 break; 5447 default: 5448 return -EOPNOTSUPP; 5449 } 5450 5451 if (ifmgd->assoc_data) 5452 return -EBUSY; 5453 5454 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5455 req->ie_len, GFP_KERNEL); 5456 if (!auth_data) 5457 return -ENOMEM; 5458 5459 auth_data->bss = req->bss; 5460 5461 if (req->auth_data_len >= 4) { 5462 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5463 __le16 *pos = (__le16 *) req->auth_data; 5464 5465 auth_data->sae_trans = le16_to_cpu(pos[0]); 5466 auth_data->sae_status = le16_to_cpu(pos[1]); 5467 } 5468 memcpy(auth_data->data, req->auth_data + 4, 5469 req->auth_data_len - 4); 5470 auth_data->data_len += req->auth_data_len - 4; 5471 } 5472 5473 /* Check if continuing authentication or trying to authenticate with the 5474 * same BSS that we were in the process of authenticating with and avoid 5475 * removal and re-addition of the STA entry in 5476 * ieee80211_prep_connection(). 5477 */ 5478 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5479 5480 if (req->ie && req->ie_len) { 5481 memcpy(&auth_data->data[auth_data->data_len], 5482 req->ie, req->ie_len); 5483 auth_data->data_len += req->ie_len; 5484 } 5485 5486 if (req->key && req->key_len) { 5487 auth_data->key_len = req->key_len; 5488 auth_data->key_idx = req->key_idx; 5489 memcpy(auth_data->key, req->key, req->key_len); 5490 } 5491 5492 auth_data->algorithm = auth_alg; 5493 5494 /* try to authenticate/probe */ 5495 5496 if (ifmgd->auth_data) { 5497 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5498 auth_data->peer_confirmed = 5499 ifmgd->auth_data->peer_confirmed; 5500 } 5501 ieee80211_destroy_auth_data(sdata, cont_auth); 5502 } 5503 5504 /* prep auth_data so we don't go into idle on disassoc */ 5505 ifmgd->auth_data = auth_data; 5506 5507 /* If this is continuation of an ongoing SAE authentication exchange 5508 * (i.e., request to send SAE Confirm) and the peer has already 5509 * confirmed, mark authentication completed since we are about to send 5510 * out SAE Confirm. 5511 */ 5512 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5513 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5514 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5515 5516 if (ifmgd->associated) { 5517 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5518 5519 sdata_info(sdata, 5520 "disconnect from AP %pM for new auth to %pM\n", 5521 ifmgd->associated->bssid, req->bss->bssid); 5522 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5523 WLAN_REASON_UNSPECIFIED, 5524 false, frame_buf); 5525 5526 ieee80211_report_disconnect(sdata, frame_buf, 5527 sizeof(frame_buf), true, 5528 WLAN_REASON_UNSPECIFIED, 5529 false); 5530 } 5531 5532 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5533 5534 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5535 if (err) 5536 goto err_clear; 5537 5538 err = ieee80211_auth(sdata); 5539 if (err) { 5540 sta_info_destroy_addr(sdata, req->bss->bssid); 5541 goto err_clear; 5542 } 5543 5544 /* hold our own reference */ 5545 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5546 return 0; 5547 5548 err_clear: 5549 eth_zero_addr(ifmgd->bssid); 5550 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5551 ifmgd->auth_data = NULL; 5552 mutex_lock(&sdata->local->mtx); 5553 ieee80211_vif_release_channel(sdata); 5554 mutex_unlock(&sdata->local->mtx); 5555 kfree(auth_data); 5556 return err; 5557 } 5558 5559 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5560 struct cfg80211_assoc_request *req) 5561 { 5562 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5563 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5564 struct ieee80211_local *local = sdata->local; 5565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5566 struct ieee80211_bss *bss = (void *)req->bss->priv; 5567 struct ieee80211_mgd_assoc_data *assoc_data; 5568 const struct cfg80211_bss_ies *beacon_ies; 5569 struct ieee80211_supported_band *sband; 5570 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5571 const struct element *ssid_elem, *ht_elem, *vht_elem; 5572 int i, err; 5573 bool override = false; 5574 5575 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5576 if (!assoc_data) 5577 return -ENOMEM; 5578 5579 rcu_read_lock(); 5580 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5581 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5582 rcu_read_unlock(); 5583 kfree(assoc_data); 5584 return -EINVAL; 5585 } 5586 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5587 assoc_data->ssid_len = ssid_elem->datalen; 5588 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5589 bss_conf->ssid_len = assoc_data->ssid_len; 5590 rcu_read_unlock(); 5591 5592 if (ifmgd->associated) { 5593 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5594 5595 sdata_info(sdata, 5596 "disconnect from AP %pM for new assoc to %pM\n", 5597 ifmgd->associated->bssid, req->bss->bssid); 5598 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5599 WLAN_REASON_UNSPECIFIED, 5600 false, frame_buf); 5601 5602 ieee80211_report_disconnect(sdata, frame_buf, 5603 sizeof(frame_buf), true, 5604 WLAN_REASON_UNSPECIFIED, 5605 false); 5606 } 5607 5608 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5609 err = -EBUSY; 5610 goto err_free; 5611 } 5612 5613 if (ifmgd->assoc_data) { 5614 err = -EBUSY; 5615 goto err_free; 5616 } 5617 5618 if (ifmgd->auth_data) { 5619 bool match; 5620 5621 /* keep sta info, bssid if matching */ 5622 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5623 ieee80211_destroy_auth_data(sdata, match); 5624 } 5625 5626 /* prepare assoc data */ 5627 5628 ifmgd->beacon_crc_valid = false; 5629 5630 assoc_data->wmm = bss->wmm_used && 5631 (local->hw.queues >= IEEE80211_NUM_ACS); 5632 5633 /* 5634 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5635 * We still associate in non-HT mode (11a/b/g) if any one of these 5636 * ciphers is configured as pairwise. 5637 * We can set this to true for non-11n hardware, that'll be checked 5638 * separately along with the peer capabilities. 5639 */ 5640 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5641 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5642 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5643 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5644 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5645 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5646 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5647 netdev_info(sdata->dev, 5648 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5649 } 5650 } 5651 5652 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5653 5654 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5655 if (!bss->wmm_used) { 5656 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5657 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5658 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5659 netdev_info(sdata->dev, 5660 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5661 } 5662 5663 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5664 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5665 sizeof(ifmgd->ht_capa_mask)); 5666 5667 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5668 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5669 sizeof(ifmgd->vht_capa_mask)); 5670 5671 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5672 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5673 sizeof(ifmgd->s1g_capa_mask)); 5674 5675 if (req->ie && req->ie_len) { 5676 memcpy(assoc_data->ie, req->ie, req->ie_len); 5677 assoc_data->ie_len = req->ie_len; 5678 } 5679 5680 if (req->fils_kek) { 5681 /* should already be checked in cfg80211 - so warn */ 5682 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5683 err = -EINVAL; 5684 goto err_free; 5685 } 5686 memcpy(assoc_data->fils_kek, req->fils_kek, 5687 req->fils_kek_len); 5688 assoc_data->fils_kek_len = req->fils_kek_len; 5689 } 5690 5691 if (req->fils_nonces) 5692 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5693 2 * FILS_NONCE_LEN); 5694 5695 assoc_data->bss = req->bss; 5696 assoc_data->capability = req->bss->capability; 5697 assoc_data->supp_rates = bss->supp_rates; 5698 assoc_data->supp_rates_len = bss->supp_rates_len; 5699 5700 rcu_read_lock(); 5701 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 5702 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 5703 assoc_data->ap_ht_param = 5704 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 5705 else if (!is_6ghz) 5706 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5707 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 5708 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 5709 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 5710 sizeof(struct ieee80211_vht_cap)); 5711 } else if (is_5ghz) { 5712 sdata_info(sdata, "VHT capa missing/short, disabling VHT/HE\n"); 5713 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5714 IEEE80211_STA_DISABLE_HE; 5715 } 5716 rcu_read_unlock(); 5717 5718 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5719 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5720 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5721 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5722 5723 if (bss->wmm_used && bss->uapsd_supported && 5724 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5725 assoc_data->uapsd = true; 5726 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5727 } else { 5728 assoc_data->uapsd = false; 5729 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5730 } 5731 5732 if (req->prev_bssid) 5733 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5734 5735 if (req->use_mfp) { 5736 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5737 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5738 } else { 5739 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5740 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5741 } 5742 5743 if (req->flags & ASSOC_REQ_USE_RRM) 5744 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5745 else 5746 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5747 5748 if (req->crypto.control_port) 5749 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5750 else 5751 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5752 5753 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5754 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5755 sdata->control_port_over_nl80211 = 5756 req->crypto.control_port_over_nl80211; 5757 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5758 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5759 sdata->vif.type); 5760 5761 /* kick off associate process */ 5762 5763 ifmgd->assoc_data = assoc_data; 5764 ifmgd->dtim_period = 0; 5765 ifmgd->have_beacon = false; 5766 5767 /* override HT/VHT configuration only if the AP and we support it */ 5768 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5769 struct ieee80211_sta_ht_cap sta_ht_cap; 5770 5771 if (req->flags & ASSOC_REQ_DISABLE_HT) 5772 override = true; 5773 5774 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5775 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5776 5777 /* check for 40 MHz disable override */ 5778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5779 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5780 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5781 override = true; 5782 5783 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5784 req->flags & ASSOC_REQ_DISABLE_VHT) 5785 override = true; 5786 } 5787 5788 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5789 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 5790 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5791 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5792 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5793 } 5794 5795 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 5796 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 5797 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5798 } 5799 5800 if (req->flags & ASSOC_REQ_DISABLE_HE) { 5801 mlme_dbg(sdata, "HE disabled by flag, disabling VHT\n"); 5802 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5803 } 5804 5805 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5806 if (err) 5807 goto err_clear; 5808 5809 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5810 if (ifmgd->powersave) 5811 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5812 else 5813 sdata->smps_mode = IEEE80211_SMPS_OFF; 5814 } else { 5815 sdata->smps_mode = ifmgd->req_smps; 5816 } 5817 5818 rcu_read_lock(); 5819 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5820 5821 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5822 !beacon_ies) { 5823 /* 5824 * Wait up to one beacon interval ... 5825 * should this be more if we miss one? 5826 */ 5827 sdata_info(sdata, "waiting for beacon from %pM\n", 5828 ifmgd->bssid); 5829 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5830 assoc_data->timeout_started = true; 5831 assoc_data->need_beacon = true; 5832 } else if (beacon_ies) { 5833 const struct element *elem; 5834 u8 dtim_count = 0; 5835 5836 ieee80211_get_dtim(beacon_ies, &dtim_count, 5837 &ifmgd->dtim_period); 5838 5839 ifmgd->have_beacon = true; 5840 assoc_data->timeout = jiffies; 5841 assoc_data->timeout_started = true; 5842 5843 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5844 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5845 sdata->vif.bss_conf.sync_device_ts = 5846 bss->device_ts_beacon; 5847 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5848 } 5849 5850 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5851 beacon_ies->data, beacon_ies->len); 5852 if (elem && elem->datalen >= 3) 5853 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5854 else 5855 sdata->vif.bss_conf.profile_periodicity = 0; 5856 5857 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5858 beacon_ies->data, beacon_ies->len); 5859 if (elem && elem->datalen >= 11 && 5860 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5861 sdata->vif.bss_conf.ema_ap = true; 5862 else 5863 sdata->vif.bss_conf.ema_ap = false; 5864 } else { 5865 assoc_data->timeout = jiffies; 5866 assoc_data->timeout_started = true; 5867 } 5868 rcu_read_unlock(); 5869 5870 run_again(sdata, assoc_data->timeout); 5871 5872 if (bss->corrupt_data) { 5873 char *corrupt_type = "data"; 5874 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5875 if (bss->corrupt_data & 5876 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5877 corrupt_type = "beacon and probe response"; 5878 else 5879 corrupt_type = "beacon"; 5880 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5881 corrupt_type = "probe response"; 5882 sdata_info(sdata, "associating with AP with corrupt %s\n", 5883 corrupt_type); 5884 } 5885 5886 return 0; 5887 err_clear: 5888 eth_zero_addr(ifmgd->bssid); 5889 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5890 ifmgd->assoc_data = NULL; 5891 err_free: 5892 kfree(assoc_data); 5893 return err; 5894 } 5895 5896 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5897 struct cfg80211_deauth_request *req) 5898 { 5899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5900 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5901 bool tx = !req->local_state_change; 5902 struct ieee80211_prep_tx_info info = { 5903 .subtype = IEEE80211_STYPE_DEAUTH, 5904 }; 5905 5906 if (ifmgd->auth_data && 5907 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5908 sdata_info(sdata, 5909 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5910 req->bssid, req->reason_code, 5911 ieee80211_get_reason_code_string(req->reason_code)); 5912 5913 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5914 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5915 IEEE80211_STYPE_DEAUTH, 5916 req->reason_code, tx, 5917 frame_buf); 5918 ieee80211_destroy_auth_data(sdata, false); 5919 ieee80211_report_disconnect(sdata, frame_buf, 5920 sizeof(frame_buf), true, 5921 req->reason_code, false); 5922 drv_mgd_complete_tx(sdata->local, sdata, &info); 5923 return 0; 5924 } 5925 5926 if (ifmgd->assoc_data && 5927 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5928 sdata_info(sdata, 5929 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5930 req->bssid, req->reason_code, 5931 ieee80211_get_reason_code_string(req->reason_code)); 5932 5933 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5934 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5935 IEEE80211_STYPE_DEAUTH, 5936 req->reason_code, tx, 5937 frame_buf); 5938 ieee80211_destroy_assoc_data(sdata, false, true); 5939 ieee80211_report_disconnect(sdata, frame_buf, 5940 sizeof(frame_buf), true, 5941 req->reason_code, false); 5942 return 0; 5943 } 5944 5945 if (ifmgd->associated && 5946 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5947 sdata_info(sdata, 5948 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5949 req->bssid, req->reason_code, 5950 ieee80211_get_reason_code_string(req->reason_code)); 5951 5952 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5953 req->reason_code, tx, frame_buf); 5954 ieee80211_report_disconnect(sdata, frame_buf, 5955 sizeof(frame_buf), true, 5956 req->reason_code, false); 5957 drv_mgd_complete_tx(sdata->local, sdata, &info); 5958 return 0; 5959 } 5960 5961 return -ENOTCONN; 5962 } 5963 5964 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5965 struct cfg80211_disassoc_request *req) 5966 { 5967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5968 u8 bssid[ETH_ALEN]; 5969 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5970 5971 /* 5972 * cfg80211 should catch this ... but it's racy since 5973 * we can receive a disassoc frame, process it, hand it 5974 * to cfg80211 while that's in a locked section already 5975 * trying to tell us that the user wants to disconnect. 5976 */ 5977 if (ifmgd->associated != req->bss) 5978 return -ENOLINK; 5979 5980 sdata_info(sdata, 5981 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5982 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5983 5984 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5985 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5986 req->reason_code, !req->local_state_change, 5987 frame_buf); 5988 5989 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5990 req->reason_code, false); 5991 5992 return 0; 5993 } 5994 5995 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5996 { 5997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5998 5999 /* 6000 * Make sure some work items will not run after this, 6001 * they will not do anything but might not have been 6002 * cancelled when disconnecting. 6003 */ 6004 cancel_work_sync(&ifmgd->monitor_work); 6005 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 6006 cancel_work_sync(&ifmgd->request_smps_work); 6007 cancel_work_sync(&ifmgd->csa_connection_drop_work); 6008 cancel_work_sync(&ifmgd->chswitch_work); 6009 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 6010 6011 sdata_lock(sdata); 6012 if (ifmgd->assoc_data) { 6013 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 6014 ieee80211_destroy_assoc_data(sdata, false, false); 6015 cfg80211_assoc_timeout(sdata->dev, bss); 6016 } 6017 if (ifmgd->auth_data) 6018 ieee80211_destroy_auth_data(sdata, false); 6019 spin_lock_bh(&ifmgd->teardown_lock); 6020 if (ifmgd->teardown_skb) { 6021 kfree_skb(ifmgd->teardown_skb); 6022 ifmgd->teardown_skb = NULL; 6023 ifmgd->orig_teardown_skb = NULL; 6024 } 6025 kfree(ifmgd->assoc_req_ies); 6026 ifmgd->assoc_req_ies = NULL; 6027 ifmgd->assoc_req_ies_len = 0; 6028 spin_unlock_bh(&ifmgd->teardown_lock); 6029 del_timer_sync(&ifmgd->timer); 6030 sdata_unlock(sdata); 6031 } 6032 6033 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6034 enum nl80211_cqm_rssi_threshold_event rssi_event, 6035 s32 rssi_level, 6036 gfp_t gfp) 6037 { 6038 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6039 6040 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6041 6042 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6043 } 6044 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6045 6046 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6047 { 6048 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6049 6050 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6051 6052 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6053 } 6054 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6055