1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2021 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 static int max_nullfunc_tries = 2; 47 module_param(max_nullfunc_tries, int, 0644); 48 MODULE_PARM_DESC(max_nullfunc_tries, 49 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 50 51 static int max_probe_tries = 5; 52 module_param(max_probe_tries, int, 0644); 53 MODULE_PARM_DESC(max_probe_tries, 54 "Maximum probe tries before disconnecting (reason 4)."); 55 56 /* 57 * Beacon loss timeout is calculated as N frames times the 58 * advertised beacon interval. This may need to be somewhat 59 * higher than what hardware might detect to account for 60 * delays in the host processing frames. But since we also 61 * probe on beacon miss before declaring the connection lost 62 * default to what we want. 63 */ 64 static int beacon_loss_count = 7; 65 module_param(beacon_loss_count, int, 0644); 66 MODULE_PARM_DESC(beacon_loss_count, 67 "Number of beacon intervals before we decide beacon was lost."); 68 69 /* 70 * Time the connection can be idle before we probe 71 * it to see if we can still talk to the AP. 72 */ 73 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 74 /* 75 * Time we wait for a probe response after sending 76 * a probe request because of beacon loss or for 77 * checking the connection still works. 78 */ 79 static int probe_wait_ms = 500; 80 module_param(probe_wait_ms, int, 0644); 81 MODULE_PARM_DESC(probe_wait_ms, 82 "Maximum time(ms) to wait for probe response" 83 " before disconnecting (reason 4)."); 84 85 /* 86 * How many Beacon frames need to have been used in average signal strength 87 * before starting to indicate signal change events. 88 */ 89 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 90 91 /* 92 * We can have multiple work items (and connection probing) 93 * scheduling this timer, but we need to take care to only 94 * reschedule it when it should fire _earlier_ than it was 95 * asked for before, or if it's not pending right now. This 96 * function ensures that. Note that it then is required to 97 * run this function for all timeouts after the first one 98 * has happened -- the work that runs from this timer will 99 * do that. 100 */ 101 static void run_again(struct ieee80211_sub_if_data *sdata, 102 unsigned long timeout) 103 { 104 sdata_assert_lock(sdata); 105 106 if (!timer_pending(&sdata->u.mgd.timer) || 107 time_before(timeout, sdata->u.mgd.timer.expires)) 108 mod_timer(&sdata->u.mgd.timer, timeout); 109 } 110 111 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 112 { 113 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 114 return; 115 116 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 117 return; 118 119 mod_timer(&sdata->u.mgd.bcn_mon_timer, 120 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 121 } 122 123 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 124 { 125 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 126 127 if (unlikely(!ifmgd->associated)) 128 return; 129 130 if (ifmgd->probe_send_count) 131 ifmgd->probe_send_count = 0; 132 133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 134 return; 135 136 mod_timer(&ifmgd->conn_mon_timer, 137 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 138 } 139 140 static int ecw2cw(int ecw) 141 { 142 return (1 << ecw) - 1; 143 } 144 145 static u32 146 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 147 struct ieee80211_supported_band *sband, 148 struct ieee80211_channel *channel, 149 u32 vht_cap_info, 150 const struct ieee80211_ht_operation *ht_oper, 151 const struct ieee80211_vht_operation *vht_oper, 152 const struct ieee80211_he_operation *he_oper, 153 const struct ieee80211_eht_operation *eht_oper, 154 const struct ieee80211_s1g_oper_ie *s1g_oper, 155 struct cfg80211_chan_def *chandef, bool tracking) 156 { 157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 158 struct cfg80211_chan_def vht_chandef; 159 struct ieee80211_sta_ht_cap sta_ht_cap; 160 u32 ht_cfreq, ret; 161 162 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 163 chandef->chan = channel; 164 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 165 chandef->center_freq1 = channel->center_freq; 166 chandef->freq1_offset = channel->freq_offset; 167 168 if (channel->band == NL80211_BAND_6GHZ) { 169 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, 170 chandef)) { 171 mlme_dbg(sdata, 172 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n"); 173 ret = IEEE80211_STA_DISABLE_HT | 174 IEEE80211_STA_DISABLE_VHT | 175 IEEE80211_STA_DISABLE_HE | 176 IEEE80211_STA_DISABLE_EHT; 177 } else { 178 ret = 0; 179 } 180 vht_chandef = *chandef; 181 goto out; 182 } else if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 190 IEEE80211_STA_DISABLE_VHT | 191 IEEE80211_STA_DISABLE_80P80MHZ | 192 IEEE80211_STA_DISABLE_160MHZ; 193 goto out; 194 } 195 196 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 197 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 198 199 if (!ht_oper || !sta_ht_cap.ht_supported) { 200 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 201 ret = IEEE80211_STA_DISABLE_HT | 202 IEEE80211_STA_DISABLE_VHT | 203 IEEE80211_STA_DISABLE_HE | 204 IEEE80211_STA_DISABLE_EHT; 205 goto out; 206 } 207 208 chandef->width = NL80211_CHAN_WIDTH_20; 209 210 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 211 channel->band); 212 /* check that channel matches the right operating channel */ 213 if (!tracking && channel->center_freq != ht_cfreq) { 214 /* 215 * It's possible that some APs are confused here; 216 * Netgear WNDR3700 sometimes reports 4 higher than 217 * the actual channel in association responses, but 218 * since we look at probe response/beacon data here 219 * it should be OK. 220 */ 221 sdata_info(sdata, 222 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 223 channel->center_freq, ht_cfreq, 224 ht_oper->primary_chan, channel->band); 225 ret = IEEE80211_STA_DISABLE_HT | 226 IEEE80211_STA_DISABLE_VHT | 227 IEEE80211_STA_DISABLE_HE | 228 IEEE80211_STA_DISABLE_EHT; 229 goto out; 230 } 231 232 /* check 40 MHz support, if we have it */ 233 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 234 ieee80211_chandef_ht_oper(ht_oper, chandef); 235 } else { 236 mlme_dbg(sdata, "40 MHz not supported\n"); 237 /* 40 MHz (and 80 MHz) must be supported for VHT */ 238 ret = IEEE80211_STA_DISABLE_VHT; 239 /* also mark 40 MHz disabled */ 240 ret |= IEEE80211_STA_DISABLE_40MHZ; 241 goto out; 242 } 243 244 if (!vht_oper || !sband->vht_cap.vht_supported) { 245 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 246 ret = IEEE80211_STA_DISABLE_VHT; 247 goto out; 248 } 249 250 vht_chandef = *chandef; 251 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 252 (le32_to_cpu(he_oper->he_oper_params) & 253 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 254 struct ieee80211_vht_operation he_oper_vht_cap; 255 256 /* 257 * Set only first 3 bytes (other 2 aren't used in 258 * ieee80211_chandef_vht_oper() anyway) 259 */ 260 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 261 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 262 263 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 264 &he_oper_vht_cap, ht_oper, 265 &vht_chandef)) { 266 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 267 sdata_info(sdata, 268 "HE AP VHT information is invalid, disabling HE\n"); 269 ret = IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT; 270 goto out; 271 } 272 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 273 vht_cap_info, 274 vht_oper, ht_oper, 275 &vht_chandef)) { 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 277 sdata_info(sdata, 278 "AP VHT information is invalid, disabling VHT\n"); 279 ret = IEEE80211_STA_DISABLE_VHT; 280 goto out; 281 } 282 283 if (!cfg80211_chandef_valid(&vht_chandef)) { 284 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 285 sdata_info(sdata, 286 "AP VHT information is invalid, disabling VHT\n"); 287 ret = IEEE80211_STA_DISABLE_VHT; 288 goto out; 289 } 290 291 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 292 ret = 0; 293 goto out; 294 } 295 296 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 297 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 298 sdata_info(sdata, 299 "AP VHT information doesn't match HT, disabling VHT\n"); 300 ret = IEEE80211_STA_DISABLE_VHT; 301 goto out; 302 } 303 304 *chandef = vht_chandef; 305 306 ret = 0; 307 308 out: 309 /* 310 * When tracking the current AP, don't do any further checks if the 311 * new chandef is identical to the one we're currently using for the 312 * connection. This keeps us from playing ping-pong with regulatory, 313 * without it the following can happen (for example): 314 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 315 * - AP advertises regdom US 316 * - CRDA loads regdom US with 80 MHz prohibited (old database) 317 * - the code below detects an unsupported channel, downgrades, and 318 * we disconnect from the AP in the caller 319 * - disconnect causes CRDA to reload world regdomain and the game 320 * starts anew. 321 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 322 * 323 * It seems possible that there are still scenarios with CSA or real 324 * bandwidth changes where a this could happen, but those cases are 325 * less common and wouldn't completely prevent using the AP. 326 */ 327 if (tracking && 328 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 329 return ret; 330 331 /* don't print the message below for VHT mismatch if VHT is disabled */ 332 if (ret & IEEE80211_STA_DISABLE_VHT) 333 vht_chandef = *chandef; 334 335 /* 336 * Ignore the DISABLED flag when we're already connected and only 337 * tracking the APs beacon for bandwidth changes - otherwise we 338 * might get disconnected here if we connect to an AP, update our 339 * regulatory information based on the AP's country IE and the 340 * information we have is wrong/outdated and disables the channel 341 * that we're actually using for the connection to the AP. 342 */ 343 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 344 tracking ? 0 : 345 IEEE80211_CHAN_DISABLED)) { 346 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 347 ret = IEEE80211_STA_DISABLE_HT | 348 IEEE80211_STA_DISABLE_VHT | 349 IEEE80211_STA_DISABLE_HE | 350 IEEE80211_STA_DISABLE_EHT; 351 break; 352 } 353 354 ret |= ieee80211_chandef_downgrade(chandef); 355 } 356 357 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 358 IEEE80211_CHAN_NO_HE)) 359 ret |= IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT; 360 361 if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 362 IEEE80211_CHAN_NO_EHT)) 363 ret |= IEEE80211_STA_DISABLE_EHT; 364 365 if (chandef->width != vht_chandef.width && !tracking) 366 sdata_info(sdata, 367 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 368 369 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 370 return ret; 371 } 372 373 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 374 struct sta_info *sta, 375 const struct ieee80211_ht_cap *ht_cap, 376 const struct ieee80211_vht_cap *vht_cap, 377 const struct ieee80211_ht_operation *ht_oper, 378 const struct ieee80211_vht_operation *vht_oper, 379 const struct ieee80211_he_operation *he_oper, 380 const struct ieee80211_eht_operation *eht_oper, 381 const struct ieee80211_s1g_oper_ie *s1g_oper, 382 const u8 *bssid, u32 *changed) 383 { 384 struct ieee80211_local *local = sdata->local; 385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 386 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 387 struct ieee80211_supported_band *sband = 388 local->hw.wiphy->bands[chan->band]; 389 struct cfg80211_chan_def chandef; 390 u16 ht_opmode; 391 u32 flags; 392 u32 vht_cap_info = 0; 393 int ret; 394 395 /* if HT was/is disabled, don't track any bandwidth changes */ 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 397 return 0; 398 399 /* don't check VHT if we associated as non-VHT station */ 400 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 401 vht_oper = NULL; 402 403 /* don't check HE if we associated as non-HE station */ 404 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 405 !ieee80211_get_he_iftype_cap(sband, 406 ieee80211_vif_type_p2p(&sdata->vif))) { 407 he_oper = NULL; 408 eht_oper = NULL; 409 } 410 411 /* don't check EHT if we associated as non-EHT station */ 412 if (ifmgd->flags & IEEE80211_STA_DISABLE_EHT || 413 !ieee80211_get_eht_iftype_cap(sband, 414 ieee80211_vif_type_p2p(&sdata->vif))) 415 eht_oper = NULL; 416 417 if (WARN_ON_ONCE(!sta)) 418 return -EINVAL; 419 420 /* 421 * if bss configuration changed store the new one - 422 * this may be applicable even if channel is identical 423 */ 424 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 425 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 426 *changed |= BSS_CHANGED_HT; 427 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 428 } 429 430 if (vht_cap) 431 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 432 433 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 434 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 435 ht_oper, vht_oper, 436 he_oper, eht_oper, 437 s1g_oper, &chandef, true); 438 439 /* 440 * Downgrade the new channel if we associated with restricted 441 * capabilities. For example, if we associated as a 20 MHz STA 442 * to a 40 MHz AP (due to regulatory, capabilities or config 443 * reasons) then switching to a 40 MHz channel now won't do us 444 * any good -- we couldn't use it with the AP. 445 */ 446 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 447 chandef.width == NL80211_CHAN_WIDTH_80P80) 448 flags |= ieee80211_chandef_downgrade(&chandef); 449 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 450 chandef.width == NL80211_CHAN_WIDTH_160) 451 flags |= ieee80211_chandef_downgrade(&chandef); 452 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 453 chandef.width > NL80211_CHAN_WIDTH_20) 454 flags |= ieee80211_chandef_downgrade(&chandef); 455 456 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 457 return 0; 458 459 sdata_info(sdata, 460 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 461 "width %d (%d.%03d/%d MHz)\n", 462 ifmgd->bssid, chandef.chan->center_freq, 463 chandef.chan->freq_offset, chandef.width, 464 chandef.center_freq1, chandef.freq1_offset, 465 chandef.center_freq2); 466 467 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 468 IEEE80211_STA_DISABLE_VHT | 469 IEEE80211_STA_DISABLE_HE | 470 IEEE80211_STA_DISABLE_EHT | 471 IEEE80211_STA_DISABLE_40MHZ | 472 IEEE80211_STA_DISABLE_80P80MHZ | 473 IEEE80211_STA_DISABLE_160MHZ | 474 IEEE80211_STA_DISABLE_320MHZ)) || 475 !cfg80211_chandef_valid(&chandef)) { 476 sdata_info(sdata, 477 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 478 ifmgd->bssid, flags, ifmgd->flags); 479 return -EINVAL; 480 } 481 482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 483 484 if (ret) { 485 sdata_info(sdata, 486 "AP %pM changed bandwidth to incompatible one - disconnect\n", 487 ifmgd->bssid); 488 return ret; 489 } 490 491 return 0; 492 } 493 494 /* frame sending functions */ 495 496 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 497 struct sk_buff *skb, u8 ap_ht_param, 498 struct ieee80211_supported_band *sband, 499 struct ieee80211_channel *channel, 500 enum ieee80211_smps_mode smps) 501 { 502 u8 *pos; 503 u32 flags = channel->flags; 504 u16 cap; 505 struct ieee80211_sta_ht_cap ht_cap; 506 507 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 508 509 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 510 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 511 512 /* determine capability flags */ 513 cap = ht_cap.cap; 514 515 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 516 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 517 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 518 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 519 cap &= ~IEEE80211_HT_CAP_SGI_40; 520 } 521 break; 522 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 523 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 524 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 525 cap &= ~IEEE80211_HT_CAP_SGI_40; 526 } 527 break; 528 } 529 530 /* 531 * If 40 MHz was disabled associate as though we weren't 532 * capable of 40 MHz -- some broken APs will never fall 533 * back to trying to transmit in 20 MHz. 534 */ 535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 536 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 537 cap &= ~IEEE80211_HT_CAP_SGI_40; 538 } 539 540 /* set SM PS mode properly */ 541 cap &= ~IEEE80211_HT_CAP_SM_PS; 542 switch (smps) { 543 case IEEE80211_SMPS_AUTOMATIC: 544 case IEEE80211_SMPS_NUM_MODES: 545 WARN_ON(1); 546 fallthrough; 547 case IEEE80211_SMPS_OFF: 548 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 549 IEEE80211_HT_CAP_SM_PS_SHIFT; 550 break; 551 case IEEE80211_SMPS_STATIC: 552 cap |= WLAN_HT_CAP_SM_PS_STATIC << 553 IEEE80211_HT_CAP_SM_PS_SHIFT; 554 break; 555 case IEEE80211_SMPS_DYNAMIC: 556 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 557 IEEE80211_HT_CAP_SM_PS_SHIFT; 558 break; 559 } 560 561 /* reserve and fill IE */ 562 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 563 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 564 } 565 566 /* This function determines vht capability flags for the association 567 * and builds the IE. 568 * Note - the function may set the owner of the MU-MIMO capability 569 */ 570 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 571 struct sk_buff *skb, 572 struct ieee80211_supported_band *sband, 573 struct ieee80211_vht_cap *ap_vht_cap) 574 { 575 struct ieee80211_local *local = sdata->local; 576 u8 *pos; 577 u32 cap; 578 struct ieee80211_sta_vht_cap vht_cap; 579 u32 mask, ap_bf_sts, our_bf_sts; 580 581 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 582 583 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 584 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 585 586 /* determine capability flags */ 587 cap = vht_cap.cap; 588 589 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 590 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 591 592 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 593 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 594 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 595 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 596 } 597 598 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 599 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 600 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 601 } 602 603 /* 604 * Some APs apparently get confused if our capabilities are better 605 * than theirs, so restrict what we advertise in the assoc request. 606 */ 607 if (!(ap_vht_cap->vht_cap_info & 608 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 609 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 610 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 611 else if (!(ap_vht_cap->vht_cap_info & 612 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 613 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 614 615 /* 616 * If some other vif is using the MU-MIMO capability we cannot associate 617 * using MU-MIMO - this will lead to contradictions in the group-id 618 * mechanism. 619 * Ownership is defined since association request, in order to avoid 620 * simultaneous associations with MU-MIMO. 621 */ 622 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 623 bool disable_mu_mimo = false; 624 struct ieee80211_sub_if_data *other; 625 626 list_for_each_entry_rcu(other, &local->interfaces, list) { 627 if (other->vif.mu_mimo_owner) { 628 disable_mu_mimo = true; 629 break; 630 } 631 } 632 if (disable_mu_mimo) 633 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 634 else 635 sdata->vif.mu_mimo_owner = true; 636 } 637 638 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 639 640 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 641 our_bf_sts = cap & mask; 642 643 if (ap_bf_sts < our_bf_sts) { 644 cap &= ~mask; 645 cap |= ap_bf_sts; 646 } 647 648 /* reserve and fill IE */ 649 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 650 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 651 } 652 653 /* This function determines HE capability flags for the association 654 * and builds the IE. 655 */ 656 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 657 struct sk_buff *skb, 658 struct ieee80211_supported_band *sband) 659 { 660 u8 *pos, *pre_he_pos; 661 const struct ieee80211_sta_he_cap *he_cap = NULL; 662 struct ieee80211_chanctx_conf *chanctx_conf; 663 u8 he_cap_size; 664 bool reg_cap = false; 665 666 rcu_read_lock(); 667 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 668 if (!WARN_ON_ONCE(!chanctx_conf)) 669 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 670 &chanctx_conf->def, 671 IEEE80211_CHAN_NO_HE); 672 673 rcu_read_unlock(); 674 675 he_cap = ieee80211_get_he_iftype_cap(sband, 676 ieee80211_vif_type_p2p(&sdata->vif)); 677 if (!he_cap || !chanctx_conf || !reg_cap) 678 return; 679 680 /* get a max size estimate */ 681 he_cap_size = 682 2 + 1 + sizeof(he_cap->he_cap_elem) + 683 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 684 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 685 he_cap->he_cap_elem.phy_cap_info); 686 pos = skb_put(skb, he_cap_size); 687 pre_he_pos = pos; 688 pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags, 689 pos, he_cap, pos + he_cap_size); 690 /* trim excess if any */ 691 skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos)); 692 693 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 694 } 695 696 static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata, 697 struct sk_buff *skb, 698 struct ieee80211_supported_band *sband) 699 { 700 u8 *pos; 701 const struct ieee80211_sta_he_cap *he_cap; 702 const struct ieee80211_sta_eht_cap *eht_cap; 703 struct ieee80211_chanctx_conf *chanctx_conf; 704 u8 eht_cap_size; 705 bool reg_cap = false; 706 707 rcu_read_lock(); 708 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 709 if (!WARN_ON_ONCE(!chanctx_conf)) 710 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 711 &chanctx_conf->def, 712 IEEE80211_CHAN_NO_HE | 713 IEEE80211_CHAN_NO_EHT); 714 rcu_read_unlock(); 715 716 he_cap = ieee80211_get_he_iftype_cap(sband, 717 ieee80211_vif_type_p2p(&sdata->vif)); 718 eht_cap = ieee80211_get_eht_iftype_cap(sband, 719 ieee80211_vif_type_p2p(&sdata->vif)); 720 721 /* 722 * EHT capabilities element is only added if the HE capabilities element 723 * was added so assume that 'he_cap' is valid and don't check it. 724 */ 725 if (WARN_ON(!he_cap || !eht_cap || !reg_cap)) 726 return; 727 728 eht_cap_size = 729 2 + 1 + sizeof(eht_cap->eht_cap_elem) + 730 ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 731 &eht_cap->eht_cap_elem) + 732 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 733 eht_cap->eht_cap_elem.phy_cap_info); 734 pos = skb_put(skb, eht_cap_size); 735 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size); 736 } 737 738 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 739 { 740 struct ieee80211_local *local = sdata->local; 741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 742 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 743 struct sk_buff *skb; 744 struct ieee80211_mgmt *mgmt; 745 u8 *pos, qos_info, *ie_start; 746 size_t offset = 0, noffset; 747 int i, count, rates_len, supp_rates_len, shift; 748 u16 capab; 749 struct ieee80211_supported_band *sband; 750 struct ieee80211_chanctx_conf *chanctx_conf; 751 struct ieee80211_channel *chan; 752 u32 rates = 0; 753 __le16 listen_int; 754 struct element *ext_capa = NULL; 755 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 756 const struct ieee80211_sband_iftype_data *iftd; 757 struct ieee80211_prep_tx_info info = {}; 758 int ret; 759 760 /* we know it's writable, cast away the const */ 761 if (assoc_data->ie_len) 762 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 763 assoc_data->ie, 764 assoc_data->ie_len); 765 766 sdata_assert_lock(sdata); 767 768 rcu_read_lock(); 769 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 770 if (WARN_ON(!chanctx_conf)) { 771 rcu_read_unlock(); 772 return -EINVAL; 773 } 774 chan = chanctx_conf->def.chan; 775 rcu_read_unlock(); 776 sband = local->hw.wiphy->bands[chan->band]; 777 shift = ieee80211_vif_get_shift(&sdata->vif); 778 779 if (assoc_data->supp_rates_len) { 780 /* 781 * Get all rates supported by the device and the AP as 782 * some APs don't like getting a superset of their rates 783 * in the association request (e.g. D-Link DAP 1353 in 784 * b-only mode)... 785 */ 786 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 787 assoc_data->supp_rates, 788 assoc_data->supp_rates_len, 789 &rates); 790 } else { 791 /* 792 * In case AP not provide any supported rates information 793 * before association, we send information element(s) with 794 * all rates that we support. 795 */ 796 rates_len = 0; 797 for (i = 0; i < sband->n_bitrates; i++) { 798 rates |= BIT(i); 799 rates_len++; 800 } 801 } 802 803 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 804 805 skb = alloc_skb(local->hw.extra_tx_headroom + 806 sizeof(*mgmt) + /* bit too much but doesn't matter */ 807 2 + assoc_data->ssid_len + /* SSID */ 808 4 + rates_len + /* (extended) rates */ 809 4 + /* power capability */ 810 2 + 2 * sband->n_channels + /* supported channels */ 811 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 812 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 813 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 814 sizeof(struct ieee80211_he_mcs_nss_supp) + 815 IEEE80211_HE_PPE_THRES_MAX_LEN + 816 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 817 assoc_data->ie_len + /* extra IEs */ 818 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 819 9 + /* WMM */ 820 (iftd ? iftd->vendor_elems.len : 0), 821 GFP_KERNEL); 822 if (!skb) 823 return -ENOMEM; 824 825 skb_reserve(skb, local->hw.extra_tx_headroom); 826 827 capab = WLAN_CAPABILITY_ESS; 828 829 if (sband->band == NL80211_BAND_2GHZ) { 830 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 831 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 832 } 833 834 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 835 capab |= WLAN_CAPABILITY_PRIVACY; 836 837 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 838 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 839 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 840 841 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 842 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 843 844 mgmt = skb_put_zero(skb, 24); 845 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 846 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 847 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 848 849 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 850 ieee80211_encode_usf(local->hw.conf.listen_interval) : 851 local->hw.conf.listen_interval); 852 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 853 skb_put(skb, 10); 854 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 855 IEEE80211_STYPE_REASSOC_REQ); 856 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 857 mgmt->u.reassoc_req.listen_interval = listen_int; 858 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 859 ETH_ALEN); 860 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 861 } else { 862 skb_put(skb, 4); 863 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 864 IEEE80211_STYPE_ASSOC_REQ); 865 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 866 mgmt->u.assoc_req.listen_interval = listen_int; 867 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 868 } 869 870 /* SSID */ 871 pos = skb_put(skb, 2 + assoc_data->ssid_len); 872 ie_start = pos; 873 *pos++ = WLAN_EID_SSID; 874 *pos++ = assoc_data->ssid_len; 875 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 876 877 if (sband->band == NL80211_BAND_S1GHZ) 878 goto skip_rates; 879 880 /* add all rates which were marked to be used above */ 881 supp_rates_len = rates_len; 882 if (supp_rates_len > 8) 883 supp_rates_len = 8; 884 885 pos = skb_put(skb, supp_rates_len + 2); 886 *pos++ = WLAN_EID_SUPP_RATES; 887 *pos++ = supp_rates_len; 888 889 count = 0; 890 for (i = 0; i < sband->n_bitrates; i++) { 891 if (BIT(i) & rates) { 892 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 893 5 * (1 << shift)); 894 *pos++ = (u8) rate; 895 if (++count == 8) 896 break; 897 } 898 } 899 900 if (rates_len > count) { 901 pos = skb_put(skb, rates_len - count + 2); 902 *pos++ = WLAN_EID_EXT_SUPP_RATES; 903 *pos++ = rates_len - count; 904 905 for (i++; i < sband->n_bitrates; i++) { 906 if (BIT(i) & rates) { 907 int rate; 908 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 909 5 * (1 << shift)); 910 *pos++ = (u8) rate; 911 } 912 } 913 } 914 915 skip_rates: 916 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 917 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 918 pos = skb_put(skb, 4); 919 *pos++ = WLAN_EID_PWR_CAPABILITY; 920 *pos++ = 2; 921 *pos++ = 0; /* min tx power */ 922 /* max tx power */ 923 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 924 } 925 926 /* 927 * Per spec, we shouldn't include the list of channels if we advertise 928 * support for extended channel switching, but we've always done that; 929 * (for now?) apply this restriction only on the (new) 6 GHz band. 930 */ 931 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 932 (sband->band != NL80211_BAND_6GHZ || 933 !ext_capa || ext_capa->datalen < 1 || 934 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 935 /* TODO: get this in reg domain format */ 936 pos = skb_put(skb, 2 * sband->n_channels + 2); 937 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 938 *pos++ = 2 * sband->n_channels; 939 for (i = 0; i < sband->n_channels; i++) { 940 *pos++ = ieee80211_frequency_to_channel( 941 sband->channels[i].center_freq); 942 *pos++ = 1; /* one channel in the subband*/ 943 } 944 } 945 946 /* Set MBSSID support for HE AP if needed */ 947 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 948 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 949 ext_capa && ext_capa->datalen >= 3) 950 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 951 952 /* if present, add any custom IEs that go before HT */ 953 if (assoc_data->ie_len) { 954 static const u8 before_ht[] = { 955 WLAN_EID_SSID, 956 WLAN_EID_SUPP_RATES, 957 WLAN_EID_EXT_SUPP_RATES, 958 WLAN_EID_PWR_CAPABILITY, 959 WLAN_EID_SUPPORTED_CHANNELS, 960 WLAN_EID_RSN, 961 WLAN_EID_QOS_CAPA, 962 WLAN_EID_RRM_ENABLED_CAPABILITIES, 963 WLAN_EID_MOBILITY_DOMAIN, 964 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 965 WLAN_EID_RIC_DATA, /* reassoc only */ 966 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 967 }; 968 static const u8 after_ric[] = { 969 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 970 WLAN_EID_HT_CAPABILITY, 971 WLAN_EID_BSS_COEX_2040, 972 /* luckily this is almost always there */ 973 WLAN_EID_EXT_CAPABILITY, 974 WLAN_EID_QOS_TRAFFIC_CAPA, 975 WLAN_EID_TIM_BCAST_REQ, 976 WLAN_EID_INTERWORKING, 977 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 978 WLAN_EID_VHT_CAPABILITY, 979 WLAN_EID_OPMODE_NOTIF, 980 }; 981 982 noffset = ieee80211_ie_split_ric(assoc_data->ie, 983 assoc_data->ie_len, 984 before_ht, 985 ARRAY_SIZE(before_ht), 986 after_ric, 987 ARRAY_SIZE(after_ric), 988 offset); 989 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 990 offset = noffset; 991 } 992 993 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 994 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 995 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 996 997 if (sband->band != NL80211_BAND_6GHZ && 998 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 999 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 1000 sband, chan, sdata->smps_mode); 1001 1002 /* if present, add any custom IEs that go before VHT */ 1003 if (assoc_data->ie_len) { 1004 static const u8 before_vht[] = { 1005 /* 1006 * no need to list the ones split off before HT 1007 * or generated here 1008 */ 1009 WLAN_EID_BSS_COEX_2040, 1010 WLAN_EID_EXT_CAPABILITY, 1011 WLAN_EID_QOS_TRAFFIC_CAPA, 1012 WLAN_EID_TIM_BCAST_REQ, 1013 WLAN_EID_INTERWORKING, 1014 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1015 }; 1016 1017 /* RIC already taken above, so no need to handle here anymore */ 1018 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 1019 before_vht, ARRAY_SIZE(before_vht), 1020 offset); 1021 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1022 offset = noffset; 1023 } 1024 1025 /* if present, add any custom IEs that go before HE */ 1026 if (assoc_data->ie_len) { 1027 static const u8 before_he[] = { 1028 /* 1029 * no need to list the ones split off before VHT 1030 * or generated here 1031 */ 1032 WLAN_EID_OPMODE_NOTIF, 1033 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1034 /* 11ai elements */ 1035 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1036 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1037 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1038 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1039 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1040 /* TODO: add 11ah/11aj/11ak elements */ 1041 }; 1042 1043 /* RIC already taken above, so no need to handle here anymore */ 1044 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 1045 before_he, ARRAY_SIZE(before_he), 1046 offset); 1047 pos = skb_put(skb, noffset - offset); 1048 memcpy(pos, assoc_data->ie + offset, noffset - offset); 1049 offset = noffset; 1050 } 1051 1052 if (sband->band != NL80211_BAND_6GHZ && 1053 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1054 ieee80211_add_vht_ie(sdata, skb, sband, 1055 &assoc_data->ap_vht_cap); 1056 1057 /* 1058 * If AP doesn't support HT, mark HE and EHT as disabled. 1059 * If on the 5GHz band, make sure it supports VHT. 1060 */ 1061 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 1062 (sband->band == NL80211_BAND_5GHZ && 1063 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 1064 ifmgd->flags |= IEEE80211_STA_DISABLE_HE | 1065 IEEE80211_STA_DISABLE_EHT; 1066 1067 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 1068 ieee80211_add_he_ie(sdata, skb, sband); 1069 1070 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) 1071 ieee80211_add_eht_ie(sdata, skb, sband); 1072 } 1073 1074 /* if present, add any custom non-vendor IEs that go after HE */ 1075 if (assoc_data->ie_len) { 1076 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1077 assoc_data->ie_len, 1078 offset); 1079 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1080 offset = noffset; 1081 } 1082 1083 if (assoc_data->wmm) { 1084 if (assoc_data->uapsd) { 1085 qos_info = ifmgd->uapsd_queues; 1086 qos_info |= (ifmgd->uapsd_max_sp_len << 1087 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1088 } else { 1089 qos_info = 0; 1090 } 1091 1092 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1093 } 1094 1095 if (sband->band == NL80211_BAND_S1GHZ) { 1096 ieee80211_add_aid_request_ie(sdata, skb); 1097 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1098 } 1099 1100 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1101 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1102 1103 /* add any remaining custom (i.e. vendor specific here) IEs */ 1104 if (assoc_data->ie_len) { 1105 noffset = assoc_data->ie_len; 1106 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1107 } 1108 1109 if (assoc_data->fils_kek_len) { 1110 ret = fils_encrypt_assoc_req(skb, assoc_data); 1111 if (ret < 0) { 1112 dev_kfree_skb(skb); 1113 return ret; 1114 } 1115 } 1116 1117 pos = skb_tail_pointer(skb); 1118 kfree(ifmgd->assoc_req_ies); 1119 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1120 if (!ifmgd->assoc_req_ies) { 1121 dev_kfree_skb(skb); 1122 return -ENOMEM; 1123 } 1124 1125 ifmgd->assoc_req_ies_len = pos - ie_start; 1126 1127 drv_mgd_prepare_tx(local, sdata, &info); 1128 1129 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1130 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1131 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1132 IEEE80211_TX_INTFL_MLME_CONN_TX; 1133 ieee80211_tx_skb(sdata, skb); 1134 1135 return 0; 1136 } 1137 1138 void ieee80211_send_pspoll(struct ieee80211_local *local, 1139 struct ieee80211_sub_if_data *sdata) 1140 { 1141 struct ieee80211_pspoll *pspoll; 1142 struct sk_buff *skb; 1143 1144 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1145 if (!skb) 1146 return; 1147 1148 pspoll = (struct ieee80211_pspoll *) skb->data; 1149 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1150 1151 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1152 ieee80211_tx_skb(sdata, skb); 1153 } 1154 1155 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1156 struct ieee80211_sub_if_data *sdata, 1157 bool powersave) 1158 { 1159 struct sk_buff *skb; 1160 struct ieee80211_hdr_3addr *nullfunc; 1161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1162 1163 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1164 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1165 if (!skb) 1166 return; 1167 1168 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1169 if (powersave) 1170 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1171 1172 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1173 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1174 1175 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1176 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1177 1178 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1179 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1180 1181 ieee80211_tx_skb(sdata, skb); 1182 } 1183 1184 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1185 struct ieee80211_sub_if_data *sdata) 1186 { 1187 struct sk_buff *skb; 1188 struct ieee80211_hdr *nullfunc; 1189 __le16 fc; 1190 1191 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1192 return; 1193 1194 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1195 if (!skb) 1196 return; 1197 1198 skb_reserve(skb, local->hw.extra_tx_headroom); 1199 1200 nullfunc = skb_put_zero(skb, 30); 1201 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1202 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1203 nullfunc->frame_control = fc; 1204 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1205 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1206 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1207 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1208 1209 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1210 ieee80211_tx_skb(sdata, skb); 1211 } 1212 1213 /* spectrum management related things */ 1214 static void ieee80211_chswitch_work(struct work_struct *work) 1215 { 1216 struct ieee80211_sub_if_data *sdata = 1217 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1218 struct ieee80211_local *local = sdata->local; 1219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1220 int ret; 1221 1222 if (!ieee80211_sdata_running(sdata)) 1223 return; 1224 1225 sdata_lock(sdata); 1226 mutex_lock(&local->mtx); 1227 mutex_lock(&local->chanctx_mtx); 1228 1229 if (!ifmgd->associated) 1230 goto out; 1231 1232 if (!sdata->vif.csa_active) 1233 goto out; 1234 1235 /* 1236 * using reservation isn't immediate as it may be deferred until later 1237 * with multi-vif. once reservation is complete it will re-schedule the 1238 * work with no reserved_chanctx so verify chandef to check if it 1239 * completed successfully 1240 */ 1241 1242 if (sdata->reserved_chanctx) { 1243 /* 1244 * with multi-vif csa driver may call ieee80211_csa_finish() 1245 * many times while waiting for other interfaces to use their 1246 * reservations 1247 */ 1248 if (sdata->reserved_ready) 1249 goto out; 1250 1251 ret = ieee80211_vif_use_reserved_context(sdata); 1252 if (ret) { 1253 sdata_info(sdata, 1254 "failed to use reserved channel context, disconnecting (err=%d)\n", 1255 ret); 1256 ieee80211_queue_work(&sdata->local->hw, 1257 &ifmgd->csa_connection_drop_work); 1258 goto out; 1259 } 1260 1261 goto out; 1262 } 1263 1264 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1265 &sdata->csa_chandef)) { 1266 sdata_info(sdata, 1267 "failed to finalize channel switch, disconnecting\n"); 1268 ieee80211_queue_work(&sdata->local->hw, 1269 &ifmgd->csa_connection_drop_work); 1270 goto out; 1271 } 1272 1273 ifmgd->csa_waiting_bcn = true; 1274 1275 ieee80211_sta_reset_beacon_monitor(sdata); 1276 ieee80211_sta_reset_conn_monitor(sdata); 1277 1278 out: 1279 mutex_unlock(&local->chanctx_mtx); 1280 mutex_unlock(&local->mtx); 1281 sdata_unlock(sdata); 1282 } 1283 1284 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1285 { 1286 struct ieee80211_local *local = sdata->local; 1287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1288 int ret; 1289 1290 sdata_assert_lock(sdata); 1291 1292 WARN_ON(!sdata->vif.csa_active); 1293 1294 if (sdata->csa_block_tx) { 1295 ieee80211_wake_vif_queues(local, sdata, 1296 IEEE80211_QUEUE_STOP_REASON_CSA); 1297 sdata->csa_block_tx = false; 1298 } 1299 1300 sdata->vif.csa_active = false; 1301 ifmgd->csa_waiting_bcn = false; 1302 /* 1303 * If the CSA IE is still present on the beacon after the switch, 1304 * we need to consider it as a new CSA (possibly to self). 1305 */ 1306 ifmgd->beacon_crc_valid = false; 1307 1308 ret = drv_post_channel_switch(sdata); 1309 if (ret) { 1310 sdata_info(sdata, 1311 "driver post channel switch failed, disconnecting\n"); 1312 ieee80211_queue_work(&local->hw, 1313 &ifmgd->csa_connection_drop_work); 1314 return; 1315 } 1316 1317 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1318 } 1319 1320 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1321 { 1322 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1324 1325 trace_api_chswitch_done(sdata, success); 1326 if (!success) { 1327 sdata_info(sdata, 1328 "driver channel switch failed, disconnecting\n"); 1329 ieee80211_queue_work(&sdata->local->hw, 1330 &ifmgd->csa_connection_drop_work); 1331 } else { 1332 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1333 } 1334 } 1335 EXPORT_SYMBOL(ieee80211_chswitch_done); 1336 1337 static void ieee80211_chswitch_timer(struct timer_list *t) 1338 { 1339 struct ieee80211_sub_if_data *sdata = 1340 from_timer(sdata, t, u.mgd.chswitch_timer); 1341 1342 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1343 } 1344 1345 static void 1346 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1347 { 1348 struct ieee80211_local *local = sdata->local; 1349 1350 if (!local->ops->abort_channel_switch) 1351 return; 1352 1353 mutex_lock(&local->mtx); 1354 1355 mutex_lock(&local->chanctx_mtx); 1356 ieee80211_vif_unreserve_chanctx(sdata); 1357 mutex_unlock(&local->chanctx_mtx); 1358 1359 if (sdata->csa_block_tx) 1360 ieee80211_wake_vif_queues(local, sdata, 1361 IEEE80211_QUEUE_STOP_REASON_CSA); 1362 1363 sdata->csa_block_tx = false; 1364 sdata->vif.csa_active = false; 1365 1366 mutex_unlock(&local->mtx); 1367 1368 drv_abort_channel_switch(sdata); 1369 } 1370 1371 static void 1372 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1373 u64 timestamp, u32 device_timestamp, 1374 struct ieee802_11_elems *elems, 1375 bool beacon) 1376 { 1377 struct ieee80211_local *local = sdata->local; 1378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1379 struct cfg80211_bss *cbss = ifmgd->associated; 1380 struct ieee80211_chanctx_conf *conf; 1381 struct ieee80211_chanctx *chanctx; 1382 enum nl80211_band current_band; 1383 struct ieee80211_csa_ie csa_ie; 1384 struct ieee80211_channel_switch ch_switch; 1385 struct ieee80211_bss *bss; 1386 int res; 1387 1388 sdata_assert_lock(sdata); 1389 1390 if (!cbss) 1391 return; 1392 1393 if (local->scanning) 1394 return; 1395 1396 current_band = cbss->channel->band; 1397 bss = (void *)cbss->priv; 1398 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1399 bss->vht_cap_info, 1400 ifmgd->flags, 1401 ifmgd->associated->bssid, &csa_ie); 1402 1403 if (!res) { 1404 ch_switch.timestamp = timestamp; 1405 ch_switch.device_timestamp = device_timestamp; 1406 ch_switch.block_tx = csa_ie.mode; 1407 ch_switch.chandef = csa_ie.chandef; 1408 ch_switch.count = csa_ie.count; 1409 ch_switch.delay = csa_ie.max_switch_time; 1410 } 1411 1412 if (res < 0) 1413 goto lock_and_drop_connection; 1414 1415 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1416 if (res) 1417 ieee80211_sta_abort_chanswitch(sdata); 1418 else 1419 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1420 return; 1421 } else if (sdata->vif.csa_active || res) { 1422 /* disregard subsequent announcements if already processing */ 1423 return; 1424 } 1425 1426 if (sdata->vif.bss_conf.chandef.chan->band != 1427 csa_ie.chandef.chan->band) { 1428 sdata_info(sdata, 1429 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1430 ifmgd->associated->bssid, 1431 csa_ie.chandef.chan->center_freq, 1432 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1433 csa_ie.chandef.center_freq2); 1434 goto lock_and_drop_connection; 1435 } 1436 1437 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1438 IEEE80211_CHAN_DISABLED)) { 1439 sdata_info(sdata, 1440 "AP %pM switches to unsupported channel " 1441 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1442 "disconnecting\n", 1443 ifmgd->associated->bssid, 1444 csa_ie.chandef.chan->center_freq, 1445 csa_ie.chandef.chan->freq_offset, 1446 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1447 csa_ie.chandef.freq1_offset, 1448 csa_ie.chandef.center_freq2); 1449 goto lock_and_drop_connection; 1450 } 1451 1452 if (cfg80211_chandef_identical(&csa_ie.chandef, 1453 &sdata->vif.bss_conf.chandef) && 1454 (!csa_ie.mode || !beacon)) { 1455 if (ifmgd->csa_ignored_same_chan) 1456 return; 1457 sdata_info(sdata, 1458 "AP %pM tries to chanswitch to same channel, ignore\n", 1459 ifmgd->associated->bssid); 1460 ifmgd->csa_ignored_same_chan = true; 1461 return; 1462 } 1463 1464 /* 1465 * Drop all TDLS peers - either we disconnect or move to a different 1466 * channel from this point on. There's no telling what our peer will do. 1467 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1468 * have an incompatible wider chandef. 1469 */ 1470 ieee80211_teardown_tdls_peers(sdata); 1471 1472 mutex_lock(&local->mtx); 1473 mutex_lock(&local->chanctx_mtx); 1474 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1475 lockdep_is_held(&local->chanctx_mtx)); 1476 if (!conf) { 1477 sdata_info(sdata, 1478 "no channel context assigned to vif?, disconnecting\n"); 1479 goto drop_connection; 1480 } 1481 1482 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1483 1484 if (local->use_chanctx && 1485 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1486 sdata_info(sdata, 1487 "driver doesn't support chan-switch with channel contexts\n"); 1488 goto drop_connection; 1489 } 1490 1491 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1492 sdata_info(sdata, 1493 "preparing for channel switch failed, disconnecting\n"); 1494 goto drop_connection; 1495 } 1496 1497 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1498 chanctx->mode, false); 1499 if (res) { 1500 sdata_info(sdata, 1501 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1502 res); 1503 goto drop_connection; 1504 } 1505 mutex_unlock(&local->chanctx_mtx); 1506 1507 sdata->vif.csa_active = true; 1508 sdata->csa_chandef = csa_ie.chandef; 1509 sdata->csa_block_tx = csa_ie.mode; 1510 ifmgd->csa_ignored_same_chan = false; 1511 ifmgd->beacon_crc_valid = false; 1512 1513 if (sdata->csa_block_tx) 1514 ieee80211_stop_vif_queues(local, sdata, 1515 IEEE80211_QUEUE_STOP_REASON_CSA); 1516 mutex_unlock(&local->mtx); 1517 1518 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1519 csa_ie.count, csa_ie.mode); 1520 1521 if (local->ops->channel_switch) { 1522 /* use driver's channel switch callback */ 1523 drv_channel_switch(local, sdata, &ch_switch); 1524 return; 1525 } 1526 1527 /* channel switch handled in software */ 1528 if (csa_ie.count <= 1) 1529 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1530 else 1531 mod_timer(&ifmgd->chswitch_timer, 1532 TU_TO_EXP_TIME((csa_ie.count - 1) * 1533 cbss->beacon_interval)); 1534 return; 1535 lock_and_drop_connection: 1536 mutex_lock(&local->mtx); 1537 mutex_lock(&local->chanctx_mtx); 1538 drop_connection: 1539 /* 1540 * This is just so that the disconnect flow will know that 1541 * we were trying to switch channel and failed. In case the 1542 * mode is 1 (we are not allowed to Tx), we will know not to 1543 * send a deauthentication frame. Those two fields will be 1544 * reset when the disconnection worker runs. 1545 */ 1546 sdata->vif.csa_active = true; 1547 sdata->csa_block_tx = csa_ie.mode; 1548 1549 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1550 mutex_unlock(&local->chanctx_mtx); 1551 mutex_unlock(&local->mtx); 1552 } 1553 1554 static bool 1555 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1556 struct ieee80211_channel *channel, 1557 const u8 *country_ie, u8 country_ie_len, 1558 const u8 *pwr_constr_elem, 1559 int *chan_pwr, int *pwr_reduction) 1560 { 1561 struct ieee80211_country_ie_triplet *triplet; 1562 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1563 int i, chan_increment; 1564 bool have_chan_pwr = false; 1565 1566 /* Invalid IE */ 1567 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1568 return false; 1569 1570 triplet = (void *)(country_ie + 3); 1571 country_ie_len -= 3; 1572 1573 switch (channel->band) { 1574 default: 1575 WARN_ON_ONCE(1); 1576 fallthrough; 1577 case NL80211_BAND_2GHZ: 1578 case NL80211_BAND_60GHZ: 1579 case NL80211_BAND_LC: 1580 chan_increment = 1; 1581 break; 1582 case NL80211_BAND_5GHZ: 1583 chan_increment = 4; 1584 break; 1585 case NL80211_BAND_6GHZ: 1586 /* 1587 * In the 6 GHz band, the "maximum transmit power level" 1588 * field in the triplets is reserved, and thus will be 1589 * zero and we shouldn't use it to control TX power. 1590 * The actual TX power will be given in the transmit 1591 * power envelope element instead. 1592 */ 1593 return false; 1594 } 1595 1596 /* find channel */ 1597 while (country_ie_len >= 3) { 1598 u8 first_channel = triplet->chans.first_channel; 1599 1600 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1601 goto next; 1602 1603 for (i = 0; i < triplet->chans.num_channels; i++) { 1604 if (first_channel + i * chan_increment == chan) { 1605 have_chan_pwr = true; 1606 *chan_pwr = triplet->chans.max_power; 1607 break; 1608 } 1609 } 1610 if (have_chan_pwr) 1611 break; 1612 1613 next: 1614 triplet++; 1615 country_ie_len -= 3; 1616 } 1617 1618 if (have_chan_pwr && pwr_constr_elem) 1619 *pwr_reduction = *pwr_constr_elem; 1620 else 1621 *pwr_reduction = 0; 1622 1623 return have_chan_pwr; 1624 } 1625 1626 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1627 struct ieee80211_channel *channel, 1628 const u8 *cisco_dtpc_ie, 1629 int *pwr_level) 1630 { 1631 /* From practical testing, the first data byte of the DTPC element 1632 * seems to contain the requested dBm level, and the CLI on Cisco 1633 * APs clearly state the range is -127 to 127 dBm, which indicates 1634 * a signed byte, although it seemingly never actually goes negative. 1635 * The other byte seems to always be zero. 1636 */ 1637 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1638 } 1639 1640 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1641 struct ieee80211_channel *channel, 1642 struct ieee80211_mgmt *mgmt, 1643 const u8 *country_ie, u8 country_ie_len, 1644 const u8 *pwr_constr_ie, 1645 const u8 *cisco_dtpc_ie) 1646 { 1647 bool has_80211h_pwr = false, has_cisco_pwr = false; 1648 int chan_pwr = 0, pwr_reduction_80211h = 0; 1649 int pwr_level_cisco, pwr_level_80211h; 1650 int new_ap_level; 1651 __le16 capab = mgmt->u.probe_resp.capab_info; 1652 1653 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1654 return 0; /* TODO */ 1655 1656 if (country_ie && 1657 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1658 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1659 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1660 sdata, channel, country_ie, country_ie_len, 1661 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1662 pwr_level_80211h = 1663 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1664 } 1665 1666 if (cisco_dtpc_ie) { 1667 ieee80211_find_cisco_dtpc( 1668 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1669 has_cisco_pwr = true; 1670 } 1671 1672 if (!has_80211h_pwr && !has_cisco_pwr) 1673 return 0; 1674 1675 /* If we have both 802.11h and Cisco DTPC, apply both limits 1676 * by picking the smallest of the two power levels advertised. 1677 */ 1678 if (has_80211h_pwr && 1679 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1680 new_ap_level = pwr_level_80211h; 1681 1682 if (sdata->ap_power_level == new_ap_level) 1683 return 0; 1684 1685 sdata_dbg(sdata, 1686 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1687 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1688 sdata->u.mgd.bssid); 1689 } else { /* has_cisco_pwr is always true here. */ 1690 new_ap_level = pwr_level_cisco; 1691 1692 if (sdata->ap_power_level == new_ap_level) 1693 return 0; 1694 1695 sdata_dbg(sdata, 1696 "Limiting TX power to %d dBm as advertised by %pM\n", 1697 pwr_level_cisco, sdata->u.mgd.bssid); 1698 } 1699 1700 sdata->ap_power_level = new_ap_level; 1701 if (__ieee80211_recalc_txpower(sdata)) 1702 return BSS_CHANGED_TXPOWER; 1703 return 0; 1704 } 1705 1706 /* powersave */ 1707 static void ieee80211_enable_ps(struct ieee80211_local *local, 1708 struct ieee80211_sub_if_data *sdata) 1709 { 1710 struct ieee80211_conf *conf = &local->hw.conf; 1711 1712 /* 1713 * If we are scanning right now then the parameters will 1714 * take effect when scan finishes. 1715 */ 1716 if (local->scanning) 1717 return; 1718 1719 if (conf->dynamic_ps_timeout > 0 && 1720 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1721 mod_timer(&local->dynamic_ps_timer, jiffies + 1722 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1723 } else { 1724 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1725 ieee80211_send_nullfunc(local, sdata, true); 1726 1727 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1728 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1729 return; 1730 1731 conf->flags |= IEEE80211_CONF_PS; 1732 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1733 } 1734 } 1735 1736 static void ieee80211_change_ps(struct ieee80211_local *local) 1737 { 1738 struct ieee80211_conf *conf = &local->hw.conf; 1739 1740 if (local->ps_sdata) { 1741 ieee80211_enable_ps(local, local->ps_sdata); 1742 } else if (conf->flags & IEEE80211_CONF_PS) { 1743 conf->flags &= ~IEEE80211_CONF_PS; 1744 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1745 del_timer_sync(&local->dynamic_ps_timer); 1746 cancel_work_sync(&local->dynamic_ps_enable_work); 1747 } 1748 } 1749 1750 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1751 { 1752 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1753 struct sta_info *sta = NULL; 1754 bool authorized = false; 1755 1756 if (!mgd->powersave) 1757 return false; 1758 1759 if (mgd->broken_ap) 1760 return false; 1761 1762 if (!mgd->associated) 1763 return false; 1764 1765 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1766 return false; 1767 1768 if (!mgd->have_beacon) 1769 return false; 1770 1771 rcu_read_lock(); 1772 sta = sta_info_get(sdata, mgd->bssid); 1773 if (sta) 1774 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1775 rcu_read_unlock(); 1776 1777 return authorized; 1778 } 1779 1780 /* need to hold RTNL or interface lock */ 1781 void ieee80211_recalc_ps(struct ieee80211_local *local) 1782 { 1783 struct ieee80211_sub_if_data *sdata, *found = NULL; 1784 int count = 0; 1785 int timeout; 1786 1787 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1788 local->ps_sdata = NULL; 1789 return; 1790 } 1791 1792 list_for_each_entry(sdata, &local->interfaces, list) { 1793 if (!ieee80211_sdata_running(sdata)) 1794 continue; 1795 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1796 /* If an AP vif is found, then disable PS 1797 * by setting the count to zero thereby setting 1798 * ps_sdata to NULL. 1799 */ 1800 count = 0; 1801 break; 1802 } 1803 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1804 continue; 1805 found = sdata; 1806 count++; 1807 } 1808 1809 if (count == 1 && ieee80211_powersave_allowed(found)) { 1810 u8 dtimper = found->u.mgd.dtim_period; 1811 1812 timeout = local->dynamic_ps_forced_timeout; 1813 if (timeout < 0) 1814 timeout = 100; 1815 local->hw.conf.dynamic_ps_timeout = timeout; 1816 1817 /* If the TIM IE is invalid, pretend the value is 1 */ 1818 if (!dtimper) 1819 dtimper = 1; 1820 1821 local->hw.conf.ps_dtim_period = dtimper; 1822 local->ps_sdata = found; 1823 } else { 1824 local->ps_sdata = NULL; 1825 } 1826 1827 ieee80211_change_ps(local); 1828 } 1829 1830 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1831 { 1832 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1833 1834 if (sdata->vif.bss_conf.ps != ps_allowed) { 1835 sdata->vif.bss_conf.ps = ps_allowed; 1836 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1837 } 1838 } 1839 1840 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1841 { 1842 struct ieee80211_local *local = 1843 container_of(work, struct ieee80211_local, 1844 dynamic_ps_disable_work); 1845 1846 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1847 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1848 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1849 } 1850 1851 ieee80211_wake_queues_by_reason(&local->hw, 1852 IEEE80211_MAX_QUEUE_MAP, 1853 IEEE80211_QUEUE_STOP_REASON_PS, 1854 false); 1855 } 1856 1857 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1858 { 1859 struct ieee80211_local *local = 1860 container_of(work, struct ieee80211_local, 1861 dynamic_ps_enable_work); 1862 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1863 struct ieee80211_if_managed *ifmgd; 1864 unsigned long flags; 1865 int q; 1866 1867 /* can only happen when PS was just disabled anyway */ 1868 if (!sdata) 1869 return; 1870 1871 ifmgd = &sdata->u.mgd; 1872 1873 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1874 return; 1875 1876 if (local->hw.conf.dynamic_ps_timeout > 0) { 1877 /* don't enter PS if TX frames are pending */ 1878 if (drv_tx_frames_pending(local)) { 1879 mod_timer(&local->dynamic_ps_timer, jiffies + 1880 msecs_to_jiffies( 1881 local->hw.conf.dynamic_ps_timeout)); 1882 return; 1883 } 1884 1885 /* 1886 * transmission can be stopped by others which leads to 1887 * dynamic_ps_timer expiry. Postpone the ps timer if it 1888 * is not the actual idle state. 1889 */ 1890 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1891 for (q = 0; q < local->hw.queues; q++) { 1892 if (local->queue_stop_reasons[q]) { 1893 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1894 flags); 1895 mod_timer(&local->dynamic_ps_timer, jiffies + 1896 msecs_to_jiffies( 1897 local->hw.conf.dynamic_ps_timeout)); 1898 return; 1899 } 1900 } 1901 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1902 } 1903 1904 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1905 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1906 if (drv_tx_frames_pending(local)) { 1907 mod_timer(&local->dynamic_ps_timer, jiffies + 1908 msecs_to_jiffies( 1909 local->hw.conf.dynamic_ps_timeout)); 1910 } else { 1911 ieee80211_send_nullfunc(local, sdata, true); 1912 /* Flush to get the tx status of nullfunc frame */ 1913 ieee80211_flush_queues(local, sdata, false); 1914 } 1915 } 1916 1917 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1918 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1919 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1920 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1921 local->hw.conf.flags |= IEEE80211_CONF_PS; 1922 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1923 } 1924 } 1925 1926 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1927 { 1928 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1929 1930 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1931 } 1932 1933 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1934 { 1935 struct delayed_work *delayed_work = to_delayed_work(work); 1936 struct ieee80211_sub_if_data *sdata = 1937 container_of(delayed_work, struct ieee80211_sub_if_data, 1938 dfs_cac_timer_work); 1939 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1940 1941 mutex_lock(&sdata->local->mtx); 1942 if (sdata->wdev.cac_started) { 1943 ieee80211_vif_release_channel(sdata); 1944 cfg80211_cac_event(sdata->dev, &chandef, 1945 NL80211_RADAR_CAC_FINISHED, 1946 GFP_KERNEL); 1947 } 1948 mutex_unlock(&sdata->local->mtx); 1949 } 1950 1951 static bool 1952 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1953 { 1954 struct ieee80211_local *local = sdata->local; 1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1956 bool ret = false; 1957 int ac; 1958 1959 if (local->hw.queues < IEEE80211_NUM_ACS) 1960 return false; 1961 1962 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1963 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1964 int non_acm_ac; 1965 unsigned long now = jiffies; 1966 1967 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1968 tx_tspec->admitted_time && 1969 time_after(now, tx_tspec->time_slice_start + HZ)) { 1970 tx_tspec->consumed_tx_time = 0; 1971 tx_tspec->time_slice_start = now; 1972 1973 if (tx_tspec->downgraded) 1974 tx_tspec->action = 1975 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1976 } 1977 1978 switch (tx_tspec->action) { 1979 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1980 /* take the original parameters */ 1981 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1982 sdata_err(sdata, 1983 "failed to set TX queue parameters for queue %d\n", 1984 ac); 1985 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1986 tx_tspec->downgraded = false; 1987 ret = true; 1988 break; 1989 case TX_TSPEC_ACTION_DOWNGRADE: 1990 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1991 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1992 ret = true; 1993 break; 1994 } 1995 /* downgrade next lower non-ACM AC */ 1996 for (non_acm_ac = ac + 1; 1997 non_acm_ac < IEEE80211_NUM_ACS; 1998 non_acm_ac++) 1999 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2000 break; 2001 /* Usually the loop will result in using BK even if it 2002 * requires admission control, but such a configuration 2003 * makes no sense and we have to transmit somehow - the 2004 * AC selection does the same thing. 2005 * If we started out trying to downgrade from BK, then 2006 * the extra condition here might be needed. 2007 */ 2008 if (non_acm_ac >= IEEE80211_NUM_ACS) 2009 non_acm_ac = IEEE80211_AC_BK; 2010 if (drv_conf_tx(local, sdata, ac, 2011 &sdata->tx_conf[non_acm_ac])) 2012 sdata_err(sdata, 2013 "failed to set TX queue parameters for queue %d\n", 2014 ac); 2015 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2016 ret = true; 2017 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2018 tx_tspec->time_slice_start + HZ - now + 1); 2019 break; 2020 case TX_TSPEC_ACTION_NONE: 2021 /* nothing now */ 2022 break; 2023 } 2024 } 2025 2026 return ret; 2027 } 2028 2029 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2030 { 2031 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2032 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 2033 } 2034 2035 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2036 { 2037 struct ieee80211_sub_if_data *sdata; 2038 2039 sdata = container_of(work, struct ieee80211_sub_if_data, 2040 u.mgd.tx_tspec_wk.work); 2041 ieee80211_sta_handle_tspec_ac_params(sdata); 2042 } 2043 2044 /* MLME */ 2045 static bool 2046 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2047 struct ieee80211_sub_if_data *sdata, 2048 const u8 *wmm_param, size_t wmm_param_len, 2049 const struct ieee80211_mu_edca_param_set *mu_edca) 2050 { 2051 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2053 size_t left; 2054 int count, mu_edca_count, ac; 2055 const u8 *pos; 2056 u8 uapsd_queues = 0; 2057 2058 if (!local->ops->conf_tx) 2059 return false; 2060 2061 if (local->hw.queues < IEEE80211_NUM_ACS) 2062 return false; 2063 2064 if (!wmm_param) 2065 return false; 2066 2067 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2068 return false; 2069 2070 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2071 uapsd_queues = ifmgd->uapsd_queues; 2072 2073 count = wmm_param[6] & 0x0f; 2074 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2075 * if mu_edca was preset before and now it disappeared tell 2076 * the driver about it. 2077 */ 2078 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2079 if (count == ifmgd->wmm_last_param_set && 2080 mu_edca_count == ifmgd->mu_edca_last_param_set) 2081 return false; 2082 ifmgd->wmm_last_param_set = count; 2083 ifmgd->mu_edca_last_param_set = mu_edca_count; 2084 2085 pos = wmm_param + 8; 2086 left = wmm_param_len - 8; 2087 2088 memset(¶ms, 0, sizeof(params)); 2089 2090 sdata->wmm_acm = 0; 2091 for (; left >= 4; left -= 4, pos += 4) { 2092 int aci = (pos[0] >> 5) & 0x03; 2093 int acm = (pos[0] >> 4) & 0x01; 2094 bool uapsd = false; 2095 2096 switch (aci) { 2097 case 1: /* AC_BK */ 2098 ac = IEEE80211_AC_BK; 2099 if (acm) 2100 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2101 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2102 uapsd = true; 2103 params[ac].mu_edca = !!mu_edca; 2104 if (mu_edca) 2105 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2106 break; 2107 case 2: /* AC_VI */ 2108 ac = IEEE80211_AC_VI; 2109 if (acm) 2110 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2111 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2112 uapsd = true; 2113 params[ac].mu_edca = !!mu_edca; 2114 if (mu_edca) 2115 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2116 break; 2117 case 3: /* AC_VO */ 2118 ac = IEEE80211_AC_VO; 2119 if (acm) 2120 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2121 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2122 uapsd = true; 2123 params[ac].mu_edca = !!mu_edca; 2124 if (mu_edca) 2125 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2126 break; 2127 case 0: /* AC_BE */ 2128 default: 2129 ac = IEEE80211_AC_BE; 2130 if (acm) 2131 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2132 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2133 uapsd = true; 2134 params[ac].mu_edca = !!mu_edca; 2135 if (mu_edca) 2136 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2137 break; 2138 } 2139 2140 params[ac].aifs = pos[0] & 0x0f; 2141 2142 if (params[ac].aifs < 2) { 2143 sdata_info(sdata, 2144 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2145 params[ac].aifs, aci); 2146 params[ac].aifs = 2; 2147 } 2148 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2149 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2150 params[ac].txop = get_unaligned_le16(pos + 2); 2151 params[ac].acm = acm; 2152 params[ac].uapsd = uapsd; 2153 2154 if (params[ac].cw_min == 0 || 2155 params[ac].cw_min > params[ac].cw_max) { 2156 sdata_info(sdata, 2157 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2158 params[ac].cw_min, params[ac].cw_max, aci); 2159 return false; 2160 } 2161 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2162 } 2163 2164 /* WMM specification requires all 4 ACIs. */ 2165 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2166 if (params[ac].cw_min == 0) { 2167 sdata_info(sdata, 2168 "AP has invalid WMM params (missing AC %d), using defaults\n", 2169 ac); 2170 return false; 2171 } 2172 } 2173 2174 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2175 mlme_dbg(sdata, 2176 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2177 ac, params[ac].acm, 2178 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2179 params[ac].txop, params[ac].uapsd, 2180 ifmgd->tx_tspec[ac].downgraded); 2181 sdata->tx_conf[ac] = params[ac]; 2182 if (!ifmgd->tx_tspec[ac].downgraded && 2183 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2184 sdata_err(sdata, 2185 "failed to set TX queue parameters for AC %d\n", 2186 ac); 2187 } 2188 2189 /* enable WMM or activate new settings */ 2190 sdata->vif.bss_conf.qos = true; 2191 return true; 2192 } 2193 2194 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2195 { 2196 lockdep_assert_held(&sdata->local->mtx); 2197 2198 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2199 ieee80211_run_deferred_scan(sdata->local); 2200 } 2201 2202 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2203 { 2204 mutex_lock(&sdata->local->mtx); 2205 __ieee80211_stop_poll(sdata); 2206 mutex_unlock(&sdata->local->mtx); 2207 } 2208 2209 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2210 u16 capab, bool erp_valid, u8 erp) 2211 { 2212 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2213 struct ieee80211_supported_band *sband; 2214 u32 changed = 0; 2215 bool use_protection; 2216 bool use_short_preamble; 2217 bool use_short_slot; 2218 2219 sband = ieee80211_get_sband(sdata); 2220 if (!sband) 2221 return changed; 2222 2223 if (erp_valid) { 2224 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2225 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2226 } else { 2227 use_protection = false; 2228 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2229 } 2230 2231 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2232 if (sband->band == NL80211_BAND_5GHZ || 2233 sband->band == NL80211_BAND_6GHZ) 2234 use_short_slot = true; 2235 2236 if (use_protection != bss_conf->use_cts_prot) { 2237 bss_conf->use_cts_prot = use_protection; 2238 changed |= BSS_CHANGED_ERP_CTS_PROT; 2239 } 2240 2241 if (use_short_preamble != bss_conf->use_short_preamble) { 2242 bss_conf->use_short_preamble = use_short_preamble; 2243 changed |= BSS_CHANGED_ERP_PREAMBLE; 2244 } 2245 2246 if (use_short_slot != bss_conf->use_short_slot) { 2247 bss_conf->use_short_slot = use_short_slot; 2248 changed |= BSS_CHANGED_ERP_SLOT; 2249 } 2250 2251 return changed; 2252 } 2253 2254 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2255 struct cfg80211_bss *cbss, 2256 u32 bss_info_changed) 2257 { 2258 struct ieee80211_bss *bss = (void *)cbss->priv; 2259 struct ieee80211_local *local = sdata->local; 2260 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2261 2262 bss_info_changed |= BSS_CHANGED_ASSOC; 2263 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2264 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2265 2266 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2267 beacon_loss_count * bss_conf->beacon_int)); 2268 2269 sdata->u.mgd.associated = cbss; 2270 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2271 2272 ieee80211_check_rate_mask(sdata); 2273 2274 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2275 2276 if (sdata->vif.p2p || 2277 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2278 const struct cfg80211_bss_ies *ies; 2279 2280 rcu_read_lock(); 2281 ies = rcu_dereference(cbss->ies); 2282 if (ies) { 2283 int ret; 2284 2285 ret = cfg80211_get_p2p_attr( 2286 ies->data, ies->len, 2287 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2288 (u8 *) &bss_conf->p2p_noa_attr, 2289 sizeof(bss_conf->p2p_noa_attr)); 2290 if (ret >= 2) { 2291 sdata->u.mgd.p2p_noa_index = 2292 bss_conf->p2p_noa_attr.index; 2293 bss_info_changed |= BSS_CHANGED_P2P_PS; 2294 } 2295 } 2296 rcu_read_unlock(); 2297 } 2298 2299 /* just to be sure */ 2300 ieee80211_stop_poll(sdata); 2301 2302 ieee80211_led_assoc(local, 1); 2303 2304 if (sdata->u.mgd.have_beacon) { 2305 /* 2306 * If the AP is buggy we may get here with no DTIM period 2307 * known, so assume it's 1 which is the only safe assumption 2308 * in that case, although if the TIM IE is broken powersave 2309 * probably just won't work at all. 2310 */ 2311 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2312 bss_conf->beacon_rate = bss->beacon_rate; 2313 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2314 } else { 2315 bss_conf->beacon_rate = NULL; 2316 bss_conf->dtim_period = 0; 2317 } 2318 2319 bss_conf->assoc = 1; 2320 2321 /* Tell the driver to monitor connection quality (if supported) */ 2322 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2323 bss_conf->cqm_rssi_thold) 2324 bss_info_changed |= BSS_CHANGED_CQM; 2325 2326 /* Enable ARP filtering */ 2327 if (bss_conf->arp_addr_cnt) 2328 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2329 2330 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2331 2332 mutex_lock(&local->iflist_mtx); 2333 ieee80211_recalc_ps(local); 2334 mutex_unlock(&local->iflist_mtx); 2335 2336 ieee80211_recalc_smps(sdata); 2337 ieee80211_recalc_ps_vif(sdata); 2338 2339 netif_carrier_on(sdata->dev); 2340 } 2341 2342 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2343 u16 stype, u16 reason, bool tx, 2344 u8 *frame_buf) 2345 { 2346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2347 struct ieee80211_local *local = sdata->local; 2348 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2349 u32 changed = 0; 2350 struct ieee80211_prep_tx_info info = { 2351 .subtype = stype, 2352 }; 2353 2354 sdata_assert_lock(sdata); 2355 2356 if (WARN_ON_ONCE(tx && !frame_buf)) 2357 return; 2358 2359 if (WARN_ON(!ifmgd->associated)) 2360 return; 2361 2362 ieee80211_stop_poll(sdata); 2363 2364 ifmgd->associated = NULL; 2365 netif_carrier_off(sdata->dev); 2366 2367 /* 2368 * if we want to get out of ps before disassoc (why?) we have 2369 * to do it before sending disassoc, as otherwise the null-packet 2370 * won't be valid. 2371 */ 2372 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2373 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2374 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2375 } 2376 local->ps_sdata = NULL; 2377 2378 /* disable per-vif ps */ 2379 ieee80211_recalc_ps_vif(sdata); 2380 2381 /* make sure ongoing transmission finishes */ 2382 synchronize_net(); 2383 2384 /* 2385 * drop any frame before deauth/disassoc, this can be data or 2386 * management frame. Since we are disconnecting, we should not 2387 * insist sending these frames which can take time and delay 2388 * the disconnection and possible the roaming. 2389 */ 2390 if (tx) 2391 ieee80211_flush_queues(local, sdata, true); 2392 2393 /* deauthenticate/disassociate now */ 2394 if (tx || frame_buf) { 2395 /* 2396 * In multi channel scenarios guarantee that the virtual 2397 * interface is granted immediate airtime to transmit the 2398 * deauthentication frame by calling mgd_prepare_tx, if the 2399 * driver requested so. 2400 */ 2401 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2402 !ifmgd->have_beacon) { 2403 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2404 } 2405 2406 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2407 ifmgd->bssid, stype, reason, 2408 tx, frame_buf); 2409 } 2410 2411 /* flush out frame - make sure the deauth was actually sent */ 2412 if (tx) 2413 ieee80211_flush_queues(local, sdata, false); 2414 2415 drv_mgd_complete_tx(sdata->local, sdata, &info); 2416 2417 /* clear bssid only after building the needed mgmt frames */ 2418 eth_zero_addr(ifmgd->bssid); 2419 2420 sdata->vif.bss_conf.ssid_len = 0; 2421 2422 /* remove AP and TDLS peers */ 2423 sta_info_flush(sdata); 2424 2425 /* finally reset all BSS / config parameters */ 2426 changed |= ieee80211_reset_erp_info(sdata); 2427 2428 ieee80211_led_assoc(local, 0); 2429 changed |= BSS_CHANGED_ASSOC; 2430 sdata->vif.bss_conf.assoc = false; 2431 2432 ifmgd->p2p_noa_index = -1; 2433 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2434 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2435 2436 /* on the next assoc, re-program HT/VHT parameters */ 2437 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2438 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2439 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2440 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2441 2442 /* reset MU-MIMO ownership and group data */ 2443 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2444 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2445 memset(sdata->vif.bss_conf.mu_group.position, 0, 2446 sizeof(sdata->vif.bss_conf.mu_group.position)); 2447 changed |= BSS_CHANGED_MU_GROUPS; 2448 sdata->vif.mu_mimo_owner = false; 2449 2450 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2451 2452 del_timer_sync(&local->dynamic_ps_timer); 2453 cancel_work_sync(&local->dynamic_ps_enable_work); 2454 2455 /* Disable ARP filtering */ 2456 if (sdata->vif.bss_conf.arp_addr_cnt) 2457 changed |= BSS_CHANGED_ARP_FILTER; 2458 2459 sdata->vif.bss_conf.qos = false; 2460 changed |= BSS_CHANGED_QOS; 2461 2462 /* The BSSID (not really interesting) and HT changed */ 2463 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2464 ieee80211_bss_info_change_notify(sdata, changed); 2465 2466 /* disassociated - set to defaults now */ 2467 ieee80211_set_wmm_default(sdata, false, false); 2468 2469 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2470 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2471 del_timer_sync(&sdata->u.mgd.timer); 2472 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2473 2474 sdata->vif.bss_conf.dtim_period = 0; 2475 sdata->vif.bss_conf.beacon_rate = NULL; 2476 2477 ifmgd->have_beacon = false; 2478 2479 ifmgd->flags = 0; 2480 mutex_lock(&local->mtx); 2481 ieee80211_vif_release_channel(sdata); 2482 2483 sdata->vif.csa_active = false; 2484 ifmgd->csa_waiting_bcn = false; 2485 ifmgd->csa_ignored_same_chan = false; 2486 if (sdata->csa_block_tx) { 2487 ieee80211_wake_vif_queues(local, sdata, 2488 IEEE80211_QUEUE_STOP_REASON_CSA); 2489 sdata->csa_block_tx = false; 2490 } 2491 mutex_unlock(&local->mtx); 2492 2493 /* existing TX TSPEC sessions no longer exist */ 2494 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2495 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2496 2497 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2498 2499 bss_conf->pwr_reduction = 0; 2500 bss_conf->tx_pwr_env_num = 0; 2501 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2502 } 2503 2504 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2505 { 2506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2507 struct ieee80211_local *local = sdata->local; 2508 2509 mutex_lock(&local->mtx); 2510 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2511 goto out; 2512 2513 __ieee80211_stop_poll(sdata); 2514 2515 mutex_lock(&local->iflist_mtx); 2516 ieee80211_recalc_ps(local); 2517 mutex_unlock(&local->iflist_mtx); 2518 2519 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2520 goto out; 2521 2522 /* 2523 * We've received a probe response, but are not sure whether 2524 * we have or will be receiving any beacons or data, so let's 2525 * schedule the timers again, just in case. 2526 */ 2527 ieee80211_sta_reset_beacon_monitor(sdata); 2528 2529 mod_timer(&ifmgd->conn_mon_timer, 2530 round_jiffies_up(jiffies + 2531 IEEE80211_CONNECTION_IDLE_TIME)); 2532 out: 2533 mutex_unlock(&local->mtx); 2534 } 2535 2536 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2537 struct ieee80211_hdr *hdr, 2538 u16 tx_time) 2539 { 2540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2541 u16 tid; 2542 int ac; 2543 struct ieee80211_sta_tx_tspec *tx_tspec; 2544 unsigned long now = jiffies; 2545 2546 if (!ieee80211_is_data_qos(hdr->frame_control)) 2547 return; 2548 2549 tid = ieee80211_get_tid(hdr); 2550 ac = ieee80211_ac_from_tid(tid); 2551 tx_tspec = &ifmgd->tx_tspec[ac]; 2552 2553 if (likely(!tx_tspec->admitted_time)) 2554 return; 2555 2556 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2557 tx_tspec->consumed_tx_time = 0; 2558 tx_tspec->time_slice_start = now; 2559 2560 if (tx_tspec->downgraded) { 2561 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2562 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2563 } 2564 } 2565 2566 if (tx_tspec->downgraded) 2567 return; 2568 2569 tx_tspec->consumed_tx_time += tx_time; 2570 2571 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2572 tx_tspec->downgraded = true; 2573 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2574 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2575 } 2576 } 2577 2578 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2579 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2580 { 2581 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2582 2583 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2584 !sdata->u.mgd.probe_send_count) 2585 return; 2586 2587 if (ack) 2588 sdata->u.mgd.probe_send_count = 0; 2589 else 2590 sdata->u.mgd.nullfunc_failed = true; 2591 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2592 } 2593 2594 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2595 const u8 *src, const u8 *dst, 2596 const u8 *ssid, size_t ssid_len, 2597 struct ieee80211_channel *channel) 2598 { 2599 struct sk_buff *skb; 2600 2601 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2602 ssid, ssid_len, NULL, 0, 2603 IEEE80211_PROBE_FLAG_DIRECTED); 2604 if (skb) 2605 ieee80211_tx_skb(sdata, skb); 2606 } 2607 2608 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2609 { 2610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2611 const struct element *ssid; 2612 u8 *dst = ifmgd->associated->bssid; 2613 u8 unicast_limit = max(1, max_probe_tries - 3); 2614 struct sta_info *sta; 2615 2616 /* 2617 * Try sending broadcast probe requests for the last three 2618 * probe requests after the first ones failed since some 2619 * buggy APs only support broadcast probe requests. 2620 */ 2621 if (ifmgd->probe_send_count >= unicast_limit) 2622 dst = NULL; 2623 2624 /* 2625 * When the hardware reports an accurate Tx ACK status, it's 2626 * better to send a nullfunc frame instead of a probe request, 2627 * as it will kick us off the AP quickly if we aren't associated 2628 * anymore. The timeout will be reset if the frame is ACKed by 2629 * the AP. 2630 */ 2631 ifmgd->probe_send_count++; 2632 2633 if (dst) { 2634 mutex_lock(&sdata->local->sta_mtx); 2635 sta = sta_info_get(sdata, dst); 2636 if (!WARN_ON(!sta)) 2637 ieee80211_check_fast_rx(sta); 2638 mutex_unlock(&sdata->local->sta_mtx); 2639 } 2640 2641 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2642 ifmgd->nullfunc_failed = false; 2643 ieee80211_send_nullfunc(sdata->local, sdata, false); 2644 } else { 2645 int ssid_len; 2646 2647 rcu_read_lock(); 2648 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); 2649 if (WARN_ON_ONCE(ssid == NULL)) 2650 ssid_len = 0; 2651 else 2652 ssid_len = ssid->datalen; 2653 2654 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2655 ssid->data, ssid_len, 2656 ifmgd->associated->channel); 2657 rcu_read_unlock(); 2658 } 2659 2660 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2661 run_again(sdata, ifmgd->probe_timeout); 2662 } 2663 2664 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2665 bool beacon) 2666 { 2667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2668 bool already = false; 2669 2670 if (!ieee80211_sdata_running(sdata)) 2671 return; 2672 2673 sdata_lock(sdata); 2674 2675 if (!ifmgd->associated) 2676 goto out; 2677 2678 mutex_lock(&sdata->local->mtx); 2679 2680 if (sdata->local->tmp_channel || sdata->local->scanning) { 2681 mutex_unlock(&sdata->local->mtx); 2682 goto out; 2683 } 2684 2685 if (sdata->local->suspending) { 2686 /* reschedule after resume */ 2687 mutex_unlock(&sdata->local->mtx); 2688 ieee80211_reset_ap_probe(sdata); 2689 goto out; 2690 } 2691 2692 if (beacon) { 2693 mlme_dbg_ratelimited(sdata, 2694 "detected beacon loss from AP (missed %d beacons) - probing\n", 2695 beacon_loss_count); 2696 2697 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2698 } 2699 2700 /* 2701 * The driver/our work has already reported this event or the 2702 * connection monitoring has kicked in and we have already sent 2703 * a probe request. Or maybe the AP died and the driver keeps 2704 * reporting until we disassociate... 2705 * 2706 * In either case we have to ignore the current call to this 2707 * function (except for setting the correct probe reason bit) 2708 * because otherwise we would reset the timer every time and 2709 * never check whether we received a probe response! 2710 */ 2711 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2712 already = true; 2713 2714 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2715 2716 mutex_unlock(&sdata->local->mtx); 2717 2718 if (already) 2719 goto out; 2720 2721 mutex_lock(&sdata->local->iflist_mtx); 2722 ieee80211_recalc_ps(sdata->local); 2723 mutex_unlock(&sdata->local->iflist_mtx); 2724 2725 ifmgd->probe_send_count = 0; 2726 ieee80211_mgd_probe_ap_send(sdata); 2727 out: 2728 sdata_unlock(sdata); 2729 } 2730 2731 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2732 struct ieee80211_vif *vif) 2733 { 2734 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2736 struct cfg80211_bss *cbss; 2737 struct sk_buff *skb; 2738 const struct element *ssid; 2739 int ssid_len; 2740 2741 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2742 return NULL; 2743 2744 sdata_assert_lock(sdata); 2745 2746 if (ifmgd->associated) 2747 cbss = ifmgd->associated; 2748 else if (ifmgd->auth_data) 2749 cbss = ifmgd->auth_data->bss; 2750 else if (ifmgd->assoc_data) 2751 cbss = ifmgd->assoc_data->bss; 2752 else 2753 return NULL; 2754 2755 rcu_read_lock(); 2756 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2757 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2758 "invalid SSID element (len=%d)", 2759 ssid ? ssid->datalen : -1)) 2760 ssid_len = 0; 2761 else 2762 ssid_len = ssid->datalen; 2763 2764 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2765 (u32) -1, cbss->channel, 2766 ssid->data, ssid_len, 2767 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2768 rcu_read_unlock(); 2769 2770 return skb; 2771 } 2772 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2773 2774 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2775 const u8 *buf, size_t len, bool tx, 2776 u16 reason, bool reconnect) 2777 { 2778 struct ieee80211_event event = { 2779 .type = MLME_EVENT, 2780 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2781 .u.mlme.reason = reason, 2782 }; 2783 2784 if (tx) 2785 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2786 else 2787 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2788 2789 drv_event_callback(sdata->local, sdata, &event); 2790 } 2791 2792 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2793 { 2794 struct ieee80211_local *local = sdata->local; 2795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2796 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2797 bool tx; 2798 2799 sdata_lock(sdata); 2800 if (!ifmgd->associated) { 2801 sdata_unlock(sdata); 2802 return; 2803 } 2804 2805 tx = !sdata->csa_block_tx; 2806 2807 if (!ifmgd->driver_disconnect) { 2808 /* 2809 * AP is probably out of range (or not reachable for another 2810 * reason) so remove the bss struct for that AP. 2811 */ 2812 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2813 } 2814 2815 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2816 ifmgd->driver_disconnect ? 2817 WLAN_REASON_DEAUTH_LEAVING : 2818 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2819 tx, frame_buf); 2820 mutex_lock(&local->mtx); 2821 sdata->vif.csa_active = false; 2822 ifmgd->csa_waiting_bcn = false; 2823 if (sdata->csa_block_tx) { 2824 ieee80211_wake_vif_queues(local, sdata, 2825 IEEE80211_QUEUE_STOP_REASON_CSA); 2826 sdata->csa_block_tx = false; 2827 } 2828 mutex_unlock(&local->mtx); 2829 2830 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2831 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2832 ifmgd->reconnect); 2833 ifmgd->reconnect = false; 2834 2835 sdata_unlock(sdata); 2836 } 2837 2838 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2839 { 2840 struct ieee80211_sub_if_data *sdata = 2841 container_of(work, struct ieee80211_sub_if_data, 2842 u.mgd.beacon_connection_loss_work); 2843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2844 2845 if (ifmgd->associated) 2846 ifmgd->beacon_loss_count++; 2847 2848 if (ifmgd->connection_loss) { 2849 sdata_info(sdata, "Connection to AP %pM lost\n", 2850 ifmgd->bssid); 2851 __ieee80211_disconnect(sdata); 2852 ifmgd->connection_loss = false; 2853 } else if (ifmgd->driver_disconnect) { 2854 sdata_info(sdata, 2855 "Driver requested disconnection from AP %pM\n", 2856 ifmgd->bssid); 2857 __ieee80211_disconnect(sdata); 2858 ifmgd->driver_disconnect = false; 2859 } else { 2860 ieee80211_mgd_probe_ap(sdata, true); 2861 } 2862 } 2863 2864 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2865 { 2866 struct ieee80211_sub_if_data *sdata = 2867 container_of(work, struct ieee80211_sub_if_data, 2868 u.mgd.csa_connection_drop_work); 2869 2870 __ieee80211_disconnect(sdata); 2871 } 2872 2873 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2874 { 2875 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2876 struct ieee80211_hw *hw = &sdata->local->hw; 2877 2878 trace_api_beacon_loss(sdata); 2879 2880 sdata->u.mgd.connection_loss = false; 2881 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2882 } 2883 EXPORT_SYMBOL(ieee80211_beacon_loss); 2884 2885 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2886 { 2887 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2888 struct ieee80211_hw *hw = &sdata->local->hw; 2889 2890 trace_api_connection_loss(sdata); 2891 2892 sdata->u.mgd.connection_loss = true; 2893 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2894 } 2895 EXPORT_SYMBOL(ieee80211_connection_loss); 2896 2897 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2898 { 2899 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2900 struct ieee80211_hw *hw = &sdata->local->hw; 2901 2902 trace_api_disconnect(sdata, reconnect); 2903 2904 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2905 return; 2906 2907 sdata->u.mgd.driver_disconnect = true; 2908 sdata->u.mgd.reconnect = reconnect; 2909 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2910 } 2911 EXPORT_SYMBOL(ieee80211_disconnect); 2912 2913 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2914 bool assoc) 2915 { 2916 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2917 2918 sdata_assert_lock(sdata); 2919 2920 if (!assoc) { 2921 /* 2922 * we are not authenticated yet, the only timer that could be 2923 * running is the timeout for the authentication response which 2924 * which is not relevant anymore. 2925 */ 2926 del_timer_sync(&sdata->u.mgd.timer); 2927 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2928 2929 eth_zero_addr(sdata->u.mgd.bssid); 2930 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2931 sdata->u.mgd.flags = 0; 2932 mutex_lock(&sdata->local->mtx); 2933 ieee80211_vif_release_channel(sdata); 2934 mutex_unlock(&sdata->local->mtx); 2935 } 2936 2937 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2938 kfree(auth_data); 2939 sdata->u.mgd.auth_data = NULL; 2940 } 2941 2942 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2943 bool assoc, bool abandon) 2944 { 2945 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2946 2947 sdata_assert_lock(sdata); 2948 2949 if (!assoc) { 2950 /* 2951 * we are not associated yet, the only timer that could be 2952 * running is the timeout for the association response which 2953 * which is not relevant anymore. 2954 */ 2955 del_timer_sync(&sdata->u.mgd.timer); 2956 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2957 2958 eth_zero_addr(sdata->u.mgd.bssid); 2959 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2960 sdata->u.mgd.flags = 0; 2961 sdata->vif.mu_mimo_owner = false; 2962 2963 mutex_lock(&sdata->local->mtx); 2964 ieee80211_vif_release_channel(sdata); 2965 mutex_unlock(&sdata->local->mtx); 2966 2967 if (abandon) 2968 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2969 } 2970 2971 kfree(assoc_data); 2972 sdata->u.mgd.assoc_data = NULL; 2973 } 2974 2975 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2976 struct ieee80211_mgmt *mgmt, size_t len) 2977 { 2978 struct ieee80211_local *local = sdata->local; 2979 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2980 const struct element *challenge; 2981 u8 *pos; 2982 u32 tx_flags = 0; 2983 struct ieee80211_prep_tx_info info = { 2984 .subtype = IEEE80211_STYPE_AUTH, 2985 }; 2986 2987 pos = mgmt->u.auth.variable; 2988 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2989 len - (pos - (u8 *)mgmt)); 2990 if (!challenge) 2991 return; 2992 auth_data->expected_transaction = 4; 2993 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2994 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2995 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2996 IEEE80211_TX_INTFL_MLME_CONN_TX; 2997 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2998 (void *)challenge, 2999 challenge->datalen + sizeof(*challenge), 3000 auth_data->bss->bssid, auth_data->bss->bssid, 3001 auth_data->key, auth_data->key_len, 3002 auth_data->key_idx, tx_flags); 3003 } 3004 3005 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 3006 const u8 *bssid) 3007 { 3008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3009 struct sta_info *sta; 3010 bool result = true; 3011 3012 sdata_info(sdata, "authenticated\n"); 3013 ifmgd->auth_data->done = true; 3014 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3015 ifmgd->auth_data->timeout_started = true; 3016 run_again(sdata, ifmgd->auth_data->timeout); 3017 3018 /* move station state to auth */ 3019 mutex_lock(&sdata->local->sta_mtx); 3020 sta = sta_info_get(sdata, bssid); 3021 if (!sta) { 3022 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 3023 result = false; 3024 goto out; 3025 } 3026 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3027 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 3028 result = false; 3029 goto out; 3030 } 3031 3032 out: 3033 mutex_unlock(&sdata->local->sta_mtx); 3034 return result; 3035 } 3036 3037 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3038 struct ieee80211_mgmt *mgmt, size_t len) 3039 { 3040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3041 u8 bssid[ETH_ALEN]; 3042 u16 auth_alg, auth_transaction, status_code; 3043 struct ieee80211_event event = { 3044 .type = MLME_EVENT, 3045 .u.mlme.data = AUTH_EVENT, 3046 }; 3047 struct ieee80211_prep_tx_info info = { 3048 .subtype = IEEE80211_STYPE_AUTH, 3049 }; 3050 3051 sdata_assert_lock(sdata); 3052 3053 if (len < 24 + 6) 3054 return; 3055 3056 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3057 return; 3058 3059 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3060 3061 if (!ether_addr_equal(bssid, mgmt->bssid)) 3062 return; 3063 3064 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3065 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3066 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3067 3068 if (auth_alg != ifmgd->auth_data->algorithm || 3069 (auth_alg != WLAN_AUTH_SAE && 3070 auth_transaction != ifmgd->auth_data->expected_transaction) || 3071 (auth_alg == WLAN_AUTH_SAE && 3072 (auth_transaction < ifmgd->auth_data->expected_transaction || 3073 auth_transaction > 2))) { 3074 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3075 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3076 auth_transaction, 3077 ifmgd->auth_data->expected_transaction); 3078 goto notify_driver; 3079 } 3080 3081 if (status_code != WLAN_STATUS_SUCCESS) { 3082 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3083 3084 if (auth_alg == WLAN_AUTH_SAE && 3085 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3086 (auth_transaction == 1 && 3087 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3088 status_code == WLAN_STATUS_SAE_PK)))) { 3089 /* waiting for userspace now */ 3090 ifmgd->auth_data->waiting = true; 3091 ifmgd->auth_data->timeout = 3092 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3093 ifmgd->auth_data->timeout_started = true; 3094 run_again(sdata, ifmgd->auth_data->timeout); 3095 goto notify_driver; 3096 } 3097 3098 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3099 mgmt->sa, status_code); 3100 ieee80211_destroy_auth_data(sdata, false); 3101 event.u.mlme.status = MLME_DENIED; 3102 event.u.mlme.reason = status_code; 3103 drv_event_callback(sdata->local, sdata, &event); 3104 goto notify_driver; 3105 } 3106 3107 switch (ifmgd->auth_data->algorithm) { 3108 case WLAN_AUTH_OPEN: 3109 case WLAN_AUTH_LEAP: 3110 case WLAN_AUTH_FT: 3111 case WLAN_AUTH_SAE: 3112 case WLAN_AUTH_FILS_SK: 3113 case WLAN_AUTH_FILS_SK_PFS: 3114 case WLAN_AUTH_FILS_PK: 3115 break; 3116 case WLAN_AUTH_SHARED_KEY: 3117 if (ifmgd->auth_data->expected_transaction != 4) { 3118 ieee80211_auth_challenge(sdata, mgmt, len); 3119 /* need another frame */ 3120 return; 3121 } 3122 break; 3123 default: 3124 WARN_ONCE(1, "invalid auth alg %d", 3125 ifmgd->auth_data->algorithm); 3126 goto notify_driver; 3127 } 3128 3129 event.u.mlme.status = MLME_SUCCESS; 3130 info.success = 1; 3131 drv_event_callback(sdata->local, sdata, &event); 3132 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3133 (auth_transaction == 2 && 3134 ifmgd->auth_data->expected_transaction == 2)) { 3135 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3136 return; /* ignore frame -- wait for timeout */ 3137 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3138 auth_transaction == 2) { 3139 sdata_info(sdata, "SAE peer confirmed\n"); 3140 ifmgd->auth_data->peer_confirmed = true; 3141 } 3142 3143 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3144 notify_driver: 3145 drv_mgd_complete_tx(sdata->local, sdata, &info); 3146 } 3147 3148 #define case_WLAN(type) \ 3149 case WLAN_REASON_##type: return #type 3150 3151 const char *ieee80211_get_reason_code_string(u16 reason_code) 3152 { 3153 switch (reason_code) { 3154 case_WLAN(UNSPECIFIED); 3155 case_WLAN(PREV_AUTH_NOT_VALID); 3156 case_WLAN(DEAUTH_LEAVING); 3157 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3158 case_WLAN(DISASSOC_AP_BUSY); 3159 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3160 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3161 case_WLAN(DISASSOC_STA_HAS_LEFT); 3162 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3163 case_WLAN(DISASSOC_BAD_POWER); 3164 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3165 case_WLAN(INVALID_IE); 3166 case_WLAN(MIC_FAILURE); 3167 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3168 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3169 case_WLAN(IE_DIFFERENT); 3170 case_WLAN(INVALID_GROUP_CIPHER); 3171 case_WLAN(INVALID_PAIRWISE_CIPHER); 3172 case_WLAN(INVALID_AKMP); 3173 case_WLAN(UNSUPP_RSN_VERSION); 3174 case_WLAN(INVALID_RSN_IE_CAP); 3175 case_WLAN(IEEE8021X_FAILED); 3176 case_WLAN(CIPHER_SUITE_REJECTED); 3177 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3178 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3179 case_WLAN(DISASSOC_LOW_ACK); 3180 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3181 case_WLAN(QSTA_LEAVE_QBSS); 3182 case_WLAN(QSTA_NOT_USE); 3183 case_WLAN(QSTA_REQUIRE_SETUP); 3184 case_WLAN(QSTA_TIMEOUT); 3185 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3186 case_WLAN(MESH_PEER_CANCELED); 3187 case_WLAN(MESH_MAX_PEERS); 3188 case_WLAN(MESH_CONFIG); 3189 case_WLAN(MESH_CLOSE); 3190 case_WLAN(MESH_MAX_RETRIES); 3191 case_WLAN(MESH_CONFIRM_TIMEOUT); 3192 case_WLAN(MESH_INVALID_GTK); 3193 case_WLAN(MESH_INCONSISTENT_PARAM); 3194 case_WLAN(MESH_INVALID_SECURITY); 3195 case_WLAN(MESH_PATH_ERROR); 3196 case_WLAN(MESH_PATH_NOFORWARD); 3197 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3198 case_WLAN(MAC_EXISTS_IN_MBSS); 3199 case_WLAN(MESH_CHAN_REGULATORY); 3200 case_WLAN(MESH_CHAN); 3201 default: return "<unknown>"; 3202 } 3203 } 3204 3205 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3206 struct ieee80211_mgmt *mgmt, size_t len) 3207 { 3208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3209 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3210 3211 sdata_assert_lock(sdata); 3212 3213 if (len < 24 + 2) 3214 return; 3215 3216 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3217 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3218 return; 3219 } 3220 3221 if (ifmgd->associated && 3222 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3223 const u8 *bssid = ifmgd->associated->bssid; 3224 3225 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3226 bssid, reason_code, 3227 ieee80211_get_reason_code_string(reason_code)); 3228 3229 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3230 3231 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3232 reason_code, false); 3233 return; 3234 } 3235 3236 if (ifmgd->assoc_data && 3237 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3238 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3239 3240 sdata_info(sdata, 3241 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3242 bssid, reason_code, 3243 ieee80211_get_reason_code_string(reason_code)); 3244 3245 ieee80211_destroy_assoc_data(sdata, false, true); 3246 3247 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3248 return; 3249 } 3250 } 3251 3252 3253 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3254 struct ieee80211_mgmt *mgmt, size_t len) 3255 { 3256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3257 u16 reason_code; 3258 3259 sdata_assert_lock(sdata); 3260 3261 if (len < 24 + 2) 3262 return; 3263 3264 if (!ifmgd->associated || 3265 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3266 return; 3267 3268 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3269 3270 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3271 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3272 return; 3273 } 3274 3275 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3276 mgmt->sa, reason_code, 3277 ieee80211_get_reason_code_string(reason_code)); 3278 3279 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3280 3281 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3282 false); 3283 } 3284 3285 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3286 u8 *supp_rates, unsigned int supp_rates_len, 3287 u32 *rates, u32 *basic_rates, 3288 bool *have_higher_than_11mbit, 3289 int *min_rate, int *min_rate_index, 3290 int shift) 3291 { 3292 int i, j; 3293 3294 for (i = 0; i < supp_rates_len; i++) { 3295 int rate = supp_rates[i] & 0x7f; 3296 bool is_basic = !!(supp_rates[i] & 0x80); 3297 3298 if ((rate * 5 * (1 << shift)) > 110) 3299 *have_higher_than_11mbit = true; 3300 3301 /* 3302 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3303 * since they're not rates. 3304 * 3305 * Note: Even though the membership selector and the basic 3306 * rate flag share the same bit, they are not exactly 3307 * the same. 3308 */ 3309 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3310 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3311 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3312 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3313 continue; 3314 3315 for (j = 0; j < sband->n_bitrates; j++) { 3316 struct ieee80211_rate *br; 3317 int brate; 3318 3319 br = &sband->bitrates[j]; 3320 3321 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3322 if (brate == rate) { 3323 *rates |= BIT(j); 3324 if (is_basic) 3325 *basic_rates |= BIT(j); 3326 if ((rate * 5) < *min_rate) { 3327 *min_rate = rate * 5; 3328 *min_rate_index = j; 3329 } 3330 break; 3331 } 3332 } 3333 } 3334 } 3335 3336 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3337 const struct ieee802_11_elems *elems) 3338 { 3339 if (elems->ext_capab_len < 10) 3340 return false; 3341 3342 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3343 return false; 3344 3345 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3346 IEEE80211_HE_MAC_CAP0_TWT_RES; 3347 } 3348 3349 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3350 struct sta_info *sta, 3351 struct ieee802_11_elems *elems) 3352 { 3353 bool twt = ieee80211_twt_req_supported(sta, elems); 3354 3355 if (sdata->vif.bss_conf.twt_requester != twt) { 3356 sdata->vif.bss_conf.twt_requester = twt; 3357 return BSS_CHANGED_TWT; 3358 } 3359 return 0; 3360 } 3361 3362 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3363 struct ieee80211_bss_conf *bss_conf, 3364 struct ieee80211_supported_band *sband, 3365 struct sta_info *sta) 3366 { 3367 const struct ieee80211_sta_he_cap *own_he_cap = 3368 ieee80211_get_he_iftype_cap(sband, 3369 ieee80211_vif_type_p2p(&sdata->vif)); 3370 3371 return bss_conf->he_support && 3372 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3373 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3374 own_he_cap && 3375 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3376 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3377 } 3378 3379 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3380 struct cfg80211_bss *cbss, 3381 struct ieee80211_mgmt *mgmt, size_t len, 3382 struct ieee802_11_elems *elems) 3383 { 3384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3385 struct ieee80211_local *local = sdata->local; 3386 struct ieee80211_supported_band *sband; 3387 struct sta_info *sta; 3388 u16 capab_info, aid; 3389 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3390 const struct cfg80211_bss_ies *bss_ies = NULL; 3391 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3392 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3393 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3394 u32 changed = 0; 3395 u8 *pos; 3396 int err; 3397 bool ret; 3398 3399 /* AssocResp and ReassocResp have identical structure */ 3400 3401 pos = mgmt->u.assoc_resp.variable; 3402 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3403 if (is_s1g) { 3404 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3405 aid = 0; /* TODO */ 3406 } 3407 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3408 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3409 mgmt->bssid, assoc_data->bss->bssid); 3410 3411 if (!elems) 3412 return false; 3413 3414 if (elems->aid_resp) 3415 aid = le16_to_cpu(elems->aid_resp->aid); 3416 3417 /* 3418 * The 5 MSB of the AID field are reserved 3419 * (802.11-2016 9.4.1.8 AID field) 3420 */ 3421 aid &= 0x7ff; 3422 3423 ifmgd->broken_ap = false; 3424 3425 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3426 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3427 aid); 3428 aid = 0; 3429 ifmgd->broken_ap = true; 3430 } 3431 3432 if (!is_s1g && !elems->supp_rates) { 3433 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3434 ret = false; 3435 goto out; 3436 } 3437 3438 sdata->vif.bss_conf.aid = aid; 3439 ifmgd->tdls_chan_switch_prohibited = 3440 elems->ext_capab && elems->ext_capab_len >= 5 && 3441 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3442 3443 /* 3444 * Some APs are erroneously not including some information in their 3445 * (re)association response frames. Try to recover by using the data 3446 * from the beacon or probe response. This seems to afflict mobile 3447 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3448 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3449 */ 3450 if (!is_6ghz && 3451 ((assoc_data->wmm && !elems->wmm_param) || 3452 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3453 (!elems->ht_cap_elem || !elems->ht_operation)) || 3454 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3455 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3456 const struct cfg80211_bss_ies *ies; 3457 struct ieee802_11_elems *bss_elems; 3458 3459 rcu_read_lock(); 3460 ies = rcu_dereference(cbss->ies); 3461 if (ies) 3462 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3463 GFP_ATOMIC); 3464 rcu_read_unlock(); 3465 if (!bss_ies) { 3466 ret = false; 3467 goto out; 3468 } 3469 3470 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3471 false, mgmt->bssid, 3472 assoc_data->bss->bssid); 3473 if (!bss_elems) { 3474 ret = false; 3475 goto out; 3476 } 3477 3478 if (assoc_data->wmm && 3479 !elems->wmm_param && bss_elems->wmm_param) { 3480 elems->wmm_param = bss_elems->wmm_param; 3481 sdata_info(sdata, 3482 "AP bug: WMM param missing from AssocResp\n"); 3483 } 3484 3485 /* 3486 * Also check if we requested HT/VHT, otherwise the AP doesn't 3487 * have to include the IEs in the (re)association response. 3488 */ 3489 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3490 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3491 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3492 sdata_info(sdata, 3493 "AP bug: HT capability missing from AssocResp\n"); 3494 } 3495 if (!elems->ht_operation && bss_elems->ht_operation && 3496 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3497 elems->ht_operation = bss_elems->ht_operation; 3498 sdata_info(sdata, 3499 "AP bug: HT operation missing from AssocResp\n"); 3500 } 3501 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3502 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3503 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3504 sdata_info(sdata, 3505 "AP bug: VHT capa missing from AssocResp\n"); 3506 } 3507 if (!elems->vht_operation && bss_elems->vht_operation && 3508 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3509 elems->vht_operation = bss_elems->vht_operation; 3510 sdata_info(sdata, 3511 "AP bug: VHT operation missing from AssocResp\n"); 3512 } 3513 3514 kfree(bss_elems); 3515 } 3516 3517 /* 3518 * We previously checked these in the beacon/probe response, so 3519 * they should be present here. This is just a safety net. 3520 */ 3521 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3522 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3523 sdata_info(sdata, 3524 "HT AP is missing WMM params or HT capability/operation\n"); 3525 ret = false; 3526 goto out; 3527 } 3528 3529 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3530 (!elems->vht_cap_elem || !elems->vht_operation)) { 3531 sdata_info(sdata, 3532 "VHT AP is missing VHT capability/operation\n"); 3533 ret = false; 3534 goto out; 3535 } 3536 3537 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3538 !elems->he_6ghz_capa) { 3539 sdata_info(sdata, 3540 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3541 ret = false; 3542 goto out; 3543 } 3544 3545 mutex_lock(&sdata->local->sta_mtx); 3546 /* 3547 * station info was already allocated and inserted before 3548 * the association and should be available to us 3549 */ 3550 sta = sta_info_get(sdata, cbss->bssid); 3551 if (WARN_ON(!sta)) { 3552 mutex_unlock(&sdata->local->sta_mtx); 3553 ret = false; 3554 goto out; 3555 } 3556 3557 sband = ieee80211_get_sband(sdata); 3558 if (!sband) { 3559 mutex_unlock(&sdata->local->sta_mtx); 3560 ret = false; 3561 goto out; 3562 } 3563 3564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3565 (!elems->he_cap || !elems->he_operation)) { 3566 mutex_unlock(&sdata->local->sta_mtx); 3567 sdata_info(sdata, 3568 "HE AP is missing HE capability/operation\n"); 3569 ret = false; 3570 goto out; 3571 } 3572 3573 /* Set up internal HT/VHT capabilities */ 3574 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3575 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3576 elems->ht_cap_elem, sta); 3577 3578 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3579 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3580 elems->vht_cap_elem, sta); 3581 3582 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3583 elems->he_cap) { 3584 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3585 elems->he_cap, 3586 elems->he_cap_len, 3587 elems->he_6ghz_capa, 3588 sta); 3589 3590 bss_conf->he_support = sta->sta.he_cap.has_he; 3591 if (elems->rsnx && elems->rsnx_len && 3592 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3593 wiphy_ext_feature_isset(local->hw.wiphy, 3594 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3595 bss_conf->twt_protected = true; 3596 else 3597 bss_conf->twt_protected = false; 3598 3599 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3600 3601 if (elems->eht_operation && elems->eht_cap && 3602 !(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) { 3603 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 3604 elems->he_cap, 3605 elems->he_cap_len, 3606 elems->eht_cap, 3607 elems->eht_cap_len, 3608 sta); 3609 3610 bss_conf->eht_support = sta->sta.eht_cap.has_eht; 3611 } else { 3612 bss_conf->eht_support = false; 3613 } 3614 } else { 3615 bss_conf->he_support = false; 3616 bss_conf->twt_requester = false; 3617 bss_conf->twt_protected = false; 3618 bss_conf->eht_support = false; 3619 } 3620 3621 bss_conf->twt_broadcast = 3622 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3623 3624 if (bss_conf->he_support) { 3625 bss_conf->he_bss_color.color = 3626 le32_get_bits(elems->he_operation->he_oper_params, 3627 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3628 bss_conf->he_bss_color.partial = 3629 le32_get_bits(elems->he_operation->he_oper_params, 3630 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3631 bss_conf->he_bss_color.enabled = 3632 !le32_get_bits(elems->he_operation->he_oper_params, 3633 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3634 3635 if (bss_conf->he_bss_color.enabled) 3636 changed |= BSS_CHANGED_HE_BSS_COLOR; 3637 3638 bss_conf->htc_trig_based_pkt_ext = 3639 le32_get_bits(elems->he_operation->he_oper_params, 3640 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3641 bss_conf->frame_time_rts_th = 3642 le32_get_bits(elems->he_operation->he_oper_params, 3643 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3644 3645 bss_conf->uora_exists = !!elems->uora_element; 3646 if (elems->uora_element) 3647 bss_conf->uora_ocw_range = elems->uora_element[0]; 3648 3649 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3650 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3651 /* TODO: OPEN: what happens if BSS color disable is set? */ 3652 } 3653 3654 if (cbss->transmitted_bss) { 3655 bss_conf->nontransmitted = true; 3656 ether_addr_copy(bss_conf->transmitter_bssid, 3657 cbss->transmitted_bss->bssid); 3658 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3659 bss_conf->bssid_index = cbss->bssid_index; 3660 } else { 3661 bss_conf->nontransmitted = false; 3662 memset(bss_conf->transmitter_bssid, 0, 3663 sizeof(bss_conf->transmitter_bssid)); 3664 bss_conf->bssid_indicator = 0; 3665 bss_conf->bssid_index = 0; 3666 } 3667 3668 /* 3669 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3670 * in their association response, so ignore that data for our own 3671 * configuration. If it changed since the last beacon, we'll get the 3672 * next beacon and update then. 3673 */ 3674 3675 /* 3676 * If an operating mode notification IE is present, override the 3677 * NSS calculation (that would be done in rate_control_rate_init()) 3678 * and use the # of streams from that element. 3679 */ 3680 if (elems->opmode_notif && 3681 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3682 u8 nss; 3683 3684 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3685 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3686 nss += 1; 3687 sta->sta.rx_nss = nss; 3688 } 3689 3690 rate_control_rate_init(sta); 3691 3692 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3693 set_sta_flag(sta, WLAN_STA_MFP); 3694 sta->sta.mfp = true; 3695 } else { 3696 sta->sta.mfp = false; 3697 } 3698 3699 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3700 local->hw.queues >= IEEE80211_NUM_ACS; 3701 3702 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3703 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3704 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3705 if (err) { 3706 sdata_info(sdata, 3707 "failed to move station %pM to desired state\n", 3708 sta->sta.addr); 3709 WARN_ON(__sta_info_destroy(sta)); 3710 mutex_unlock(&sdata->local->sta_mtx); 3711 ret = false; 3712 goto out; 3713 } 3714 3715 if (sdata->wdev.use_4addr) 3716 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3717 3718 mutex_unlock(&sdata->local->sta_mtx); 3719 3720 /* 3721 * Always handle WMM once after association regardless 3722 * of the first value the AP uses. Setting -1 here has 3723 * that effect because the AP values is an unsigned 3724 * 4-bit value. 3725 */ 3726 ifmgd->wmm_last_param_set = -1; 3727 ifmgd->mu_edca_last_param_set = -1; 3728 3729 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3730 ieee80211_set_wmm_default(sdata, false, false); 3731 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3732 elems->wmm_param_len, 3733 elems->mu_edca_param_set)) { 3734 /* still enable QoS since we might have HT/VHT */ 3735 ieee80211_set_wmm_default(sdata, false, true); 3736 /* set the disable-WMM flag in this case to disable 3737 * tracking WMM parameter changes in the beacon if 3738 * the parameters weren't actually valid. Doing so 3739 * avoids changing parameters very strangely when 3740 * the AP is going back and forth between valid and 3741 * invalid parameters. 3742 */ 3743 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3744 } 3745 changed |= BSS_CHANGED_QOS; 3746 3747 if (elems->max_idle_period_ie) { 3748 bss_conf->max_idle_period = 3749 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3750 bss_conf->protected_keep_alive = 3751 !!(elems->max_idle_period_ie->idle_options & 3752 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3753 changed |= BSS_CHANGED_KEEP_ALIVE; 3754 } else { 3755 bss_conf->max_idle_period = 0; 3756 bss_conf->protected_keep_alive = false; 3757 } 3758 3759 /* set assoc capability (AID was already set earlier), 3760 * ieee80211_set_associated() will tell the driver */ 3761 bss_conf->assoc_capability = capab_info; 3762 ieee80211_set_associated(sdata, cbss, changed); 3763 3764 /* 3765 * If we're using 4-addr mode, let the AP know that we're 3766 * doing so, so that it can create the STA VLAN on its side 3767 */ 3768 if (ifmgd->use_4addr) 3769 ieee80211_send_4addr_nullfunc(local, sdata); 3770 3771 /* 3772 * Start timer to probe the connection to the AP now. 3773 * Also start the timer that will detect beacon loss. 3774 */ 3775 ieee80211_sta_reset_beacon_monitor(sdata); 3776 ieee80211_sta_reset_conn_monitor(sdata); 3777 3778 ret = true; 3779 out: 3780 kfree(elems); 3781 kfree(bss_ies); 3782 return ret; 3783 } 3784 3785 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3786 struct ieee80211_mgmt *mgmt, 3787 size_t len) 3788 { 3789 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3790 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3791 u16 capab_info, status_code, aid; 3792 struct ieee802_11_elems *elems; 3793 int ac, uapsd_queues = -1; 3794 u8 *pos; 3795 bool reassoc; 3796 struct cfg80211_bss *cbss; 3797 struct ieee80211_event event = { 3798 .type = MLME_EVENT, 3799 .u.mlme.data = ASSOC_EVENT, 3800 }; 3801 struct ieee80211_prep_tx_info info = {}; 3802 3803 sdata_assert_lock(sdata); 3804 3805 if (!assoc_data) 3806 return; 3807 3808 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3809 return; 3810 3811 cbss = assoc_data->bss; 3812 3813 /* 3814 * AssocResp and ReassocResp have identical structure, so process both 3815 * of them in this function. 3816 */ 3817 3818 if (len < 24 + 6) 3819 return; 3820 3821 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3822 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3823 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3824 pos = mgmt->u.assoc_resp.variable; 3825 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3826 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3827 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3828 aid = 0; /* TODO */ 3829 } 3830 3831 /* 3832 * Note: this may not be perfect, AP might misbehave - if 3833 * anyone needs to rely on perfect complete notification 3834 * with the exact right subtype, then we need to track what 3835 * we actually transmitted. 3836 */ 3837 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3838 IEEE80211_STYPE_ASSOC_REQ; 3839 3840 sdata_info(sdata, 3841 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3842 reassoc ? "Rea" : "A", mgmt->sa, 3843 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3844 3845 if (assoc_data->fils_kek_len && 3846 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3847 return; 3848 3849 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3850 mgmt->bssid, assoc_data->bss->bssid); 3851 if (!elems) 3852 goto notify_driver; 3853 3854 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3855 elems->timeout_int && 3856 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3857 u32 tu, ms; 3858 3859 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss, 3860 le32_to_cpu(elems->timeout_int->value)); 3861 3862 tu = le32_to_cpu(elems->timeout_int->value); 3863 ms = tu * 1024 / 1000; 3864 sdata_info(sdata, 3865 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3866 mgmt->sa, tu, ms); 3867 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3868 assoc_data->timeout_started = true; 3869 if (ms > IEEE80211_ASSOC_TIMEOUT) 3870 run_again(sdata, assoc_data->timeout); 3871 goto notify_driver; 3872 } 3873 3874 if (status_code != WLAN_STATUS_SUCCESS) { 3875 sdata_info(sdata, "%pM denied association (code=%d)\n", 3876 mgmt->sa, status_code); 3877 ieee80211_destroy_assoc_data(sdata, false, false); 3878 event.u.mlme.status = MLME_DENIED; 3879 event.u.mlme.reason = status_code; 3880 drv_event_callback(sdata->local, sdata, &event); 3881 } else { 3882 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3883 /* oops -- internal error -- send timeout for now */ 3884 ieee80211_destroy_assoc_data(sdata, false, false); 3885 cfg80211_assoc_timeout(sdata->dev, cbss); 3886 goto notify_driver; 3887 } 3888 event.u.mlme.status = MLME_SUCCESS; 3889 drv_event_callback(sdata->local, sdata, &event); 3890 sdata_info(sdata, "associated\n"); 3891 3892 /* 3893 * destroy assoc_data afterwards, as otherwise an idle 3894 * recalc after assoc_data is NULL but before associated 3895 * is set can cause the interface to go idle 3896 */ 3897 ieee80211_destroy_assoc_data(sdata, true, false); 3898 3899 /* get uapsd queues configuration */ 3900 uapsd_queues = 0; 3901 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3902 if (sdata->tx_conf[ac].uapsd) 3903 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3904 3905 info.success = 1; 3906 } 3907 3908 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3909 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3910 notify_driver: 3911 drv_mgd_complete_tx(sdata->local, sdata, &info); 3912 kfree(elems); 3913 } 3914 3915 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3916 struct ieee80211_mgmt *mgmt, size_t len, 3917 struct ieee80211_rx_status *rx_status) 3918 { 3919 struct ieee80211_local *local = sdata->local; 3920 struct ieee80211_bss *bss; 3921 struct ieee80211_channel *channel; 3922 3923 sdata_assert_lock(sdata); 3924 3925 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3926 ieee80211_rx_status_to_khz(rx_status)); 3927 if (!channel) 3928 return; 3929 3930 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3931 if (bss) { 3932 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3933 ieee80211_rx_bss_put(local, bss); 3934 } 3935 } 3936 3937 3938 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3939 struct sk_buff *skb) 3940 { 3941 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3942 struct ieee80211_if_managed *ifmgd; 3943 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3944 struct ieee80211_channel *channel; 3945 size_t baselen, len = skb->len; 3946 3947 ifmgd = &sdata->u.mgd; 3948 3949 sdata_assert_lock(sdata); 3950 3951 /* 3952 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3953 * "If a 6 GHz AP receives a Probe Request frame and responds with 3954 * a Probe Response frame [..], the Address 1 field of the Probe 3955 * Response frame shall be set to the broadcast address [..]" 3956 * So, on 6GHz band we should also accept broadcast responses. 3957 */ 3958 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3959 rx_status->freq); 3960 if (!channel) 3961 return; 3962 3963 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3964 (channel->band != NL80211_BAND_6GHZ || 3965 !is_broadcast_ether_addr(mgmt->da))) 3966 return; /* ignore ProbeResp to foreign address */ 3967 3968 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3969 if (baselen > len) 3970 return; 3971 3972 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3973 3974 if (ifmgd->associated && 3975 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3976 ieee80211_reset_ap_probe(sdata); 3977 } 3978 3979 /* 3980 * This is the canonical list of information elements we care about, 3981 * the filter code also gives us all changes to the Microsoft OUI 3982 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3983 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3984 * changes to requested client power. 3985 * 3986 * We implement beacon filtering in software since that means we can 3987 * avoid processing the frame here and in cfg80211, and userspace 3988 * will not be able to tell whether the hardware supports it or not. 3989 * 3990 * XXX: This list needs to be dynamic -- userspace needs to be able to 3991 * add items it requires. It also needs to be able to tell us to 3992 * look out for other vendor IEs. 3993 */ 3994 static const u64 care_about_ies = 3995 (1ULL << WLAN_EID_COUNTRY) | 3996 (1ULL << WLAN_EID_ERP_INFO) | 3997 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3998 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3999 (1ULL << WLAN_EID_HT_CAPABILITY) | 4000 (1ULL << WLAN_EID_HT_OPERATION) | 4001 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 4002 4003 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 4004 struct ieee80211_if_managed *ifmgd, 4005 struct ieee80211_bss_conf *bss_conf, 4006 struct ieee80211_local *local, 4007 struct ieee80211_rx_status *rx_status) 4008 { 4009 /* Track average RSSI from the Beacon frames of the current AP */ 4010 4011 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 4012 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 4013 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 4014 ifmgd->last_cqm_event_signal = 0; 4015 ifmgd->count_beacon_signal = 1; 4016 ifmgd->last_ave_beacon_signal = 0; 4017 } else { 4018 ifmgd->count_beacon_signal++; 4019 } 4020 4021 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 4022 4023 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 4024 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 4025 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 4026 int last_sig = ifmgd->last_ave_beacon_signal; 4027 struct ieee80211_event event = { 4028 .type = RSSI_EVENT, 4029 }; 4030 4031 /* 4032 * if signal crosses either of the boundaries, invoke callback 4033 * with appropriate parameters 4034 */ 4035 if (sig > ifmgd->rssi_max_thold && 4036 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 4037 ifmgd->last_ave_beacon_signal = sig; 4038 event.u.rssi.data = RSSI_EVENT_HIGH; 4039 drv_event_callback(local, sdata, &event); 4040 } else if (sig < ifmgd->rssi_min_thold && 4041 (last_sig >= ifmgd->rssi_max_thold || 4042 last_sig == 0)) { 4043 ifmgd->last_ave_beacon_signal = sig; 4044 event.u.rssi.data = RSSI_EVENT_LOW; 4045 drv_event_callback(local, sdata, &event); 4046 } 4047 } 4048 4049 if (bss_conf->cqm_rssi_thold && 4050 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 4051 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 4052 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 4053 int last_event = ifmgd->last_cqm_event_signal; 4054 int thold = bss_conf->cqm_rssi_thold; 4055 int hyst = bss_conf->cqm_rssi_hyst; 4056 4057 if (sig < thold && 4058 (last_event == 0 || sig < last_event - hyst)) { 4059 ifmgd->last_cqm_event_signal = sig; 4060 ieee80211_cqm_rssi_notify( 4061 &sdata->vif, 4062 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 4063 sig, GFP_KERNEL); 4064 } else if (sig > thold && 4065 (last_event == 0 || sig > last_event + hyst)) { 4066 ifmgd->last_cqm_event_signal = sig; 4067 ieee80211_cqm_rssi_notify( 4068 &sdata->vif, 4069 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 4070 sig, GFP_KERNEL); 4071 } 4072 } 4073 4074 if (bss_conf->cqm_rssi_low && 4075 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 4076 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 4077 int last_event = ifmgd->last_cqm_event_signal; 4078 int low = bss_conf->cqm_rssi_low; 4079 int high = bss_conf->cqm_rssi_high; 4080 4081 if (sig < low && 4082 (last_event == 0 || last_event >= low)) { 4083 ifmgd->last_cqm_event_signal = sig; 4084 ieee80211_cqm_rssi_notify( 4085 &sdata->vif, 4086 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 4087 sig, GFP_KERNEL); 4088 } else if (sig > high && 4089 (last_event == 0 || last_event <= high)) { 4090 ifmgd->last_cqm_event_signal = sig; 4091 ieee80211_cqm_rssi_notify( 4092 &sdata->vif, 4093 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 4094 sig, GFP_KERNEL); 4095 } 4096 } 4097 } 4098 4099 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 4100 struct cfg80211_bss *bss) 4101 { 4102 if (ether_addr_equal(tx_bssid, bss->bssid)) 4103 return true; 4104 if (!bss->transmitted_bss) 4105 return false; 4106 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 4107 } 4108 4109 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 4110 struct ieee80211_hdr *hdr, size_t len, 4111 struct ieee80211_rx_status *rx_status) 4112 { 4113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4114 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 4115 struct ieee80211_mgmt *mgmt = (void *) hdr; 4116 size_t baselen; 4117 struct ieee802_11_elems *elems; 4118 struct ieee80211_local *local = sdata->local; 4119 struct ieee80211_chanctx_conf *chanctx_conf; 4120 struct ieee80211_channel *chan; 4121 struct sta_info *sta; 4122 u32 changed = 0; 4123 bool erp_valid; 4124 u8 erp_value = 0; 4125 u32 ncrc = 0; 4126 u8 *bssid, *variable = mgmt->u.beacon.variable; 4127 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4128 4129 sdata_assert_lock(sdata); 4130 4131 /* Process beacon from the current BSS */ 4132 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4133 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4134 struct ieee80211_ext *ext = (void *) mgmt; 4135 4136 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4137 variable = ext->u.s1g_short_beacon.variable; 4138 else 4139 variable = ext->u.s1g_beacon.variable; 4140 } 4141 4142 baselen = (u8 *) variable - (u8 *) mgmt; 4143 if (baselen > len) 4144 return; 4145 4146 rcu_read_lock(); 4147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4148 if (!chanctx_conf) { 4149 rcu_read_unlock(); 4150 return; 4151 } 4152 4153 if (ieee80211_rx_status_to_khz(rx_status) != 4154 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4155 rcu_read_unlock(); 4156 return; 4157 } 4158 chan = chanctx_conf->def.chan; 4159 rcu_read_unlock(); 4160 4161 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4162 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4163 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4164 bssid, 4165 ifmgd->assoc_data->bss->bssid); 4166 if (!elems) 4167 return; 4168 4169 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4170 4171 if (elems->dtim_period) 4172 ifmgd->dtim_period = elems->dtim_period; 4173 ifmgd->have_beacon = true; 4174 ifmgd->assoc_data->need_beacon = false; 4175 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4176 sdata->vif.bss_conf.sync_tsf = 4177 le64_to_cpu(mgmt->u.beacon.timestamp); 4178 sdata->vif.bss_conf.sync_device_ts = 4179 rx_status->device_timestamp; 4180 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4181 } 4182 4183 if (elems->mbssid_config_ie) 4184 bss_conf->profile_periodicity = 4185 elems->mbssid_config_ie->profile_periodicity; 4186 else 4187 bss_conf->profile_periodicity = 0; 4188 4189 if (elems->ext_capab_len >= 11 && 4190 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4191 bss_conf->ema_ap = true; 4192 else 4193 bss_conf->ema_ap = false; 4194 4195 /* continue assoc process */ 4196 ifmgd->assoc_data->timeout = jiffies; 4197 ifmgd->assoc_data->timeout_started = true; 4198 run_again(sdata, ifmgd->assoc_data->timeout); 4199 kfree(elems); 4200 return; 4201 } 4202 4203 if (!ifmgd->associated || 4204 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4205 return; 4206 bssid = ifmgd->associated->bssid; 4207 4208 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4209 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4210 local, rx_status); 4211 4212 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4213 mlme_dbg_ratelimited(sdata, 4214 "cancelling AP probe due to a received beacon\n"); 4215 ieee80211_reset_ap_probe(sdata); 4216 } 4217 4218 /* 4219 * Push the beacon loss detection into the future since 4220 * we are processing a beacon from the AP just now. 4221 */ 4222 ieee80211_sta_reset_beacon_monitor(sdata); 4223 4224 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4225 * element (which carries the beacon interval). Don't forget to add a 4226 * bit to care_about_ies[] above if mac80211 is interested in a 4227 * changing S1G element. 4228 */ 4229 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4230 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4231 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4232 false, care_about_ies, ncrc, 4233 mgmt->bssid, bssid); 4234 if (!elems) 4235 return; 4236 ncrc = elems->crc; 4237 4238 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4239 ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { 4240 if (local->hw.conf.dynamic_ps_timeout > 0) { 4241 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4242 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4243 ieee80211_hw_config(local, 4244 IEEE80211_CONF_CHANGE_PS); 4245 } 4246 ieee80211_send_nullfunc(local, sdata, false); 4247 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4248 local->pspolling = true; 4249 4250 /* 4251 * Here is assumed that the driver will be 4252 * able to send ps-poll frame and receive a 4253 * response even though power save mode is 4254 * enabled, but some drivers might require 4255 * to disable power save here. This needs 4256 * to be investigated. 4257 */ 4258 ieee80211_send_pspoll(local, sdata); 4259 } 4260 } 4261 4262 if (sdata->vif.p2p || 4263 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4264 struct ieee80211_p2p_noa_attr noa = {}; 4265 int ret; 4266 4267 ret = cfg80211_get_p2p_attr(variable, 4268 len - baselen, 4269 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4270 (u8 *) &noa, sizeof(noa)); 4271 if (ret >= 2) { 4272 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4273 /* valid noa_attr and index changed */ 4274 sdata->u.mgd.p2p_noa_index = noa.index; 4275 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4276 changed |= BSS_CHANGED_P2P_PS; 4277 /* 4278 * make sure we update all information, the CRC 4279 * mechanism doesn't look at P2P attributes. 4280 */ 4281 ifmgd->beacon_crc_valid = false; 4282 } 4283 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4284 /* noa_attr not found and we had valid noa_attr before */ 4285 sdata->u.mgd.p2p_noa_index = -1; 4286 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4287 changed |= BSS_CHANGED_P2P_PS; 4288 ifmgd->beacon_crc_valid = false; 4289 } 4290 } 4291 4292 if (ifmgd->csa_waiting_bcn) 4293 ieee80211_chswitch_post_beacon(sdata); 4294 4295 /* 4296 * Update beacon timing and dtim count on every beacon appearance. This 4297 * will allow the driver to use the most updated values. Do it before 4298 * comparing this one with last received beacon. 4299 * IMPORTANT: These parameters would possibly be out of sync by the time 4300 * the driver will use them. The synchronized view is currently 4301 * guaranteed only in certain callbacks. 4302 */ 4303 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4304 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4305 sdata->vif.bss_conf.sync_tsf = 4306 le64_to_cpu(mgmt->u.beacon.timestamp); 4307 sdata->vif.bss_conf.sync_device_ts = 4308 rx_status->device_timestamp; 4309 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4310 } 4311 4312 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4313 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4314 goto free; 4315 ifmgd->beacon_crc = ncrc; 4316 ifmgd->beacon_crc_valid = true; 4317 4318 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4319 4320 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4321 rx_status->device_timestamp, 4322 elems, true); 4323 4324 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4325 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4326 elems->wmm_param_len, 4327 elems->mu_edca_param_set)) 4328 changed |= BSS_CHANGED_QOS; 4329 4330 /* 4331 * If we haven't had a beacon before, tell the driver about the 4332 * DTIM period (and beacon timing if desired) now. 4333 */ 4334 if (!ifmgd->have_beacon) { 4335 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4336 bss_conf->dtim_period = elems->dtim_period ?: 1; 4337 4338 changed |= BSS_CHANGED_BEACON_INFO; 4339 ifmgd->have_beacon = true; 4340 4341 mutex_lock(&local->iflist_mtx); 4342 ieee80211_recalc_ps(local); 4343 mutex_unlock(&local->iflist_mtx); 4344 4345 ieee80211_recalc_ps_vif(sdata); 4346 } 4347 4348 if (elems->erp_info) { 4349 erp_valid = true; 4350 erp_value = elems->erp_info[0]; 4351 } else { 4352 erp_valid = false; 4353 } 4354 4355 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4356 changed |= ieee80211_handle_bss_capability(sdata, 4357 le16_to_cpu(mgmt->u.beacon.capab_info), 4358 erp_valid, erp_value); 4359 4360 mutex_lock(&local->sta_mtx); 4361 sta = sta_info_get(sdata, bssid); 4362 4363 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4364 4365 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4366 elems->vht_cap_elem, elems->ht_operation, 4367 elems->vht_operation, elems->he_operation, 4368 elems->eht_operation, 4369 elems->s1g_oper, bssid, &changed)) { 4370 mutex_unlock(&local->sta_mtx); 4371 sdata_info(sdata, 4372 "failed to follow AP %pM bandwidth change, disconnect\n", 4373 bssid); 4374 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4375 WLAN_REASON_DEAUTH_LEAVING, 4376 true, deauth_buf); 4377 ieee80211_report_disconnect(sdata, deauth_buf, 4378 sizeof(deauth_buf), true, 4379 WLAN_REASON_DEAUTH_LEAVING, 4380 false); 4381 goto free; 4382 } 4383 4384 if (sta && elems->opmode_notif) 4385 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, 4386 rx_status->band); 4387 mutex_unlock(&local->sta_mtx); 4388 4389 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4390 elems->country_elem, 4391 elems->country_elem_len, 4392 elems->pwr_constr_elem, 4393 elems->cisco_dtpc_elem); 4394 4395 ieee80211_bss_info_change_notify(sdata, changed); 4396 free: 4397 kfree(elems); 4398 } 4399 4400 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4401 struct sk_buff *skb) 4402 { 4403 struct ieee80211_rx_status *rx_status; 4404 struct ieee80211_hdr *hdr; 4405 u16 fc; 4406 4407 rx_status = (struct ieee80211_rx_status *) skb->cb; 4408 hdr = (struct ieee80211_hdr *) skb->data; 4409 fc = le16_to_cpu(hdr->frame_control); 4410 4411 sdata_lock(sdata); 4412 switch (fc & IEEE80211_FCTL_STYPE) { 4413 case IEEE80211_STYPE_S1G_BEACON: 4414 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4415 break; 4416 } 4417 sdata_unlock(sdata); 4418 } 4419 4420 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4421 struct sk_buff *skb) 4422 { 4423 struct ieee80211_rx_status *rx_status; 4424 struct ieee80211_mgmt *mgmt; 4425 u16 fc; 4426 int ies_len; 4427 4428 rx_status = (struct ieee80211_rx_status *) skb->cb; 4429 mgmt = (struct ieee80211_mgmt *) skb->data; 4430 fc = le16_to_cpu(mgmt->frame_control); 4431 4432 sdata_lock(sdata); 4433 4434 switch (fc & IEEE80211_FCTL_STYPE) { 4435 case IEEE80211_STYPE_BEACON: 4436 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4437 skb->len, rx_status); 4438 break; 4439 case IEEE80211_STYPE_PROBE_RESP: 4440 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4441 break; 4442 case IEEE80211_STYPE_AUTH: 4443 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4444 break; 4445 case IEEE80211_STYPE_DEAUTH: 4446 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4447 break; 4448 case IEEE80211_STYPE_DISASSOC: 4449 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4450 break; 4451 case IEEE80211_STYPE_ASSOC_RESP: 4452 case IEEE80211_STYPE_REASSOC_RESP: 4453 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4454 break; 4455 case IEEE80211_STYPE_ACTION: 4456 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4457 struct ieee802_11_elems *elems; 4458 4459 ies_len = skb->len - 4460 offsetof(struct ieee80211_mgmt, 4461 u.action.u.chan_switch.variable); 4462 4463 if (ies_len < 0) 4464 break; 4465 4466 /* CSA IE cannot be overridden, no need for BSSID */ 4467 elems = ieee802_11_parse_elems( 4468 mgmt->u.action.u.chan_switch.variable, 4469 ies_len, true, mgmt->bssid, NULL); 4470 4471 if (elems && !elems->parse_error) 4472 ieee80211_sta_process_chanswitch(sdata, 4473 rx_status->mactime, 4474 rx_status->device_timestamp, 4475 elems, false); 4476 kfree(elems); 4477 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4478 struct ieee802_11_elems *elems; 4479 4480 ies_len = skb->len - 4481 offsetof(struct ieee80211_mgmt, 4482 u.action.u.ext_chan_switch.variable); 4483 4484 if (ies_len < 0) 4485 break; 4486 4487 /* 4488 * extended CSA IE can't be overridden, no need for 4489 * BSSID 4490 */ 4491 elems = ieee802_11_parse_elems( 4492 mgmt->u.action.u.ext_chan_switch.variable, 4493 ies_len, true, mgmt->bssid, NULL); 4494 4495 if (elems && !elems->parse_error) { 4496 /* for the handling code pretend it was an IE */ 4497 elems->ext_chansw_ie = 4498 &mgmt->u.action.u.ext_chan_switch.data; 4499 4500 ieee80211_sta_process_chanswitch(sdata, 4501 rx_status->mactime, 4502 rx_status->device_timestamp, 4503 elems, false); 4504 } 4505 4506 kfree(elems); 4507 } 4508 break; 4509 } 4510 sdata_unlock(sdata); 4511 } 4512 4513 static void ieee80211_sta_timer(struct timer_list *t) 4514 { 4515 struct ieee80211_sub_if_data *sdata = 4516 from_timer(sdata, t, u.mgd.timer); 4517 4518 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4519 } 4520 4521 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4522 u8 *bssid, u8 reason, bool tx) 4523 { 4524 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4525 4526 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4527 tx, frame_buf); 4528 4529 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4530 reason, false); 4531 } 4532 4533 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4534 { 4535 struct ieee80211_local *local = sdata->local; 4536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4537 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4538 u32 tx_flags = 0; 4539 u16 trans = 1; 4540 u16 status = 0; 4541 struct ieee80211_prep_tx_info info = { 4542 .subtype = IEEE80211_STYPE_AUTH, 4543 }; 4544 4545 sdata_assert_lock(sdata); 4546 4547 if (WARN_ON_ONCE(!auth_data)) 4548 return -EINVAL; 4549 4550 auth_data->tries++; 4551 4552 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4553 sdata_info(sdata, "authentication with %pM timed out\n", 4554 auth_data->bss->bssid); 4555 4556 /* 4557 * Most likely AP is not in the range so remove the 4558 * bss struct for that AP. 4559 */ 4560 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4561 4562 return -ETIMEDOUT; 4563 } 4564 4565 if (auth_data->algorithm == WLAN_AUTH_SAE) 4566 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4567 4568 drv_mgd_prepare_tx(local, sdata, &info); 4569 4570 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4571 auth_data->bss->bssid, auth_data->tries, 4572 IEEE80211_AUTH_MAX_TRIES); 4573 4574 auth_data->expected_transaction = 2; 4575 4576 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4577 trans = auth_data->sae_trans; 4578 status = auth_data->sae_status; 4579 auth_data->expected_transaction = trans; 4580 } 4581 4582 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4583 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4584 IEEE80211_TX_INTFL_MLME_CONN_TX; 4585 4586 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4587 auth_data->data, auth_data->data_len, 4588 auth_data->bss->bssid, 4589 auth_data->bss->bssid, NULL, 0, 0, 4590 tx_flags); 4591 4592 if (tx_flags == 0) { 4593 if (auth_data->algorithm == WLAN_AUTH_SAE) 4594 auth_data->timeout = jiffies + 4595 IEEE80211_AUTH_TIMEOUT_SAE; 4596 else 4597 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4598 } else { 4599 auth_data->timeout = 4600 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4601 } 4602 4603 auth_data->timeout_started = true; 4604 run_again(sdata, auth_data->timeout); 4605 4606 return 0; 4607 } 4608 4609 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4610 { 4611 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4612 struct ieee80211_local *local = sdata->local; 4613 int ret; 4614 4615 sdata_assert_lock(sdata); 4616 4617 assoc_data->tries++; 4618 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4619 sdata_info(sdata, "association with %pM timed out\n", 4620 assoc_data->bss->bssid); 4621 4622 /* 4623 * Most likely AP is not in the range so remove the 4624 * bss struct for that AP. 4625 */ 4626 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4627 4628 return -ETIMEDOUT; 4629 } 4630 4631 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4632 assoc_data->bss->bssid, assoc_data->tries, 4633 IEEE80211_ASSOC_MAX_TRIES); 4634 ret = ieee80211_send_assoc(sdata); 4635 if (ret) 4636 return ret; 4637 4638 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4639 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4640 assoc_data->timeout_started = true; 4641 run_again(sdata, assoc_data->timeout); 4642 } else { 4643 assoc_data->timeout = 4644 round_jiffies_up(jiffies + 4645 IEEE80211_ASSOC_TIMEOUT_LONG); 4646 assoc_data->timeout_started = true; 4647 run_again(sdata, assoc_data->timeout); 4648 } 4649 4650 return 0; 4651 } 4652 4653 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4654 __le16 fc, bool acked) 4655 { 4656 struct ieee80211_local *local = sdata->local; 4657 4658 sdata->u.mgd.status_fc = fc; 4659 sdata->u.mgd.status_acked = acked; 4660 sdata->u.mgd.status_received = true; 4661 4662 ieee80211_queue_work(&local->hw, &sdata->work); 4663 } 4664 4665 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4666 { 4667 struct ieee80211_local *local = sdata->local; 4668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4669 4670 sdata_lock(sdata); 4671 4672 if (ifmgd->status_received) { 4673 __le16 fc = ifmgd->status_fc; 4674 bool status_acked = ifmgd->status_acked; 4675 4676 ifmgd->status_received = false; 4677 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4678 if (status_acked) { 4679 if (ifmgd->auth_data->algorithm == 4680 WLAN_AUTH_SAE) 4681 ifmgd->auth_data->timeout = 4682 jiffies + 4683 IEEE80211_AUTH_TIMEOUT_SAE; 4684 else 4685 ifmgd->auth_data->timeout = 4686 jiffies + 4687 IEEE80211_AUTH_TIMEOUT_SHORT; 4688 run_again(sdata, ifmgd->auth_data->timeout); 4689 } else { 4690 ifmgd->auth_data->timeout = jiffies - 1; 4691 } 4692 ifmgd->auth_data->timeout_started = true; 4693 } else if (ifmgd->assoc_data && 4694 (ieee80211_is_assoc_req(fc) || 4695 ieee80211_is_reassoc_req(fc))) { 4696 if (status_acked) { 4697 ifmgd->assoc_data->timeout = 4698 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4699 run_again(sdata, ifmgd->assoc_data->timeout); 4700 } else { 4701 ifmgd->assoc_data->timeout = jiffies - 1; 4702 } 4703 ifmgd->assoc_data->timeout_started = true; 4704 } 4705 } 4706 4707 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4708 time_after(jiffies, ifmgd->auth_data->timeout)) { 4709 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 4710 /* 4711 * ok ... we waited for assoc or continuation but 4712 * userspace didn't do it, so kill the auth data 4713 */ 4714 ieee80211_destroy_auth_data(sdata, false); 4715 } else if (ieee80211_auth(sdata)) { 4716 u8 bssid[ETH_ALEN]; 4717 struct ieee80211_event event = { 4718 .type = MLME_EVENT, 4719 .u.mlme.data = AUTH_EVENT, 4720 .u.mlme.status = MLME_TIMEOUT, 4721 }; 4722 4723 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4724 4725 ieee80211_destroy_auth_data(sdata, false); 4726 4727 cfg80211_auth_timeout(sdata->dev, bssid); 4728 drv_event_callback(sdata->local, sdata, &event); 4729 } 4730 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4731 run_again(sdata, ifmgd->auth_data->timeout); 4732 4733 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4734 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4735 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4736 ieee80211_do_assoc(sdata)) { 4737 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4738 struct ieee80211_event event = { 4739 .type = MLME_EVENT, 4740 .u.mlme.data = ASSOC_EVENT, 4741 .u.mlme.status = MLME_TIMEOUT, 4742 }; 4743 4744 ieee80211_destroy_assoc_data(sdata, false, false); 4745 cfg80211_assoc_timeout(sdata->dev, bss); 4746 drv_event_callback(sdata->local, sdata, &event); 4747 } 4748 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4749 run_again(sdata, ifmgd->assoc_data->timeout); 4750 4751 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4752 ifmgd->associated) { 4753 u8 bssid[ETH_ALEN]; 4754 int max_tries; 4755 4756 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4757 4758 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4759 max_tries = max_nullfunc_tries; 4760 else 4761 max_tries = max_probe_tries; 4762 4763 /* ACK received for nullfunc probing frame */ 4764 if (!ifmgd->probe_send_count) 4765 ieee80211_reset_ap_probe(sdata); 4766 else if (ifmgd->nullfunc_failed) { 4767 if (ifmgd->probe_send_count < max_tries) { 4768 mlme_dbg(sdata, 4769 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4770 bssid, ifmgd->probe_send_count, 4771 max_tries); 4772 ieee80211_mgd_probe_ap_send(sdata); 4773 } else { 4774 mlme_dbg(sdata, 4775 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4776 bssid); 4777 ieee80211_sta_connection_lost(sdata, bssid, 4778 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4779 false); 4780 } 4781 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4782 run_again(sdata, ifmgd->probe_timeout); 4783 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4784 mlme_dbg(sdata, 4785 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4786 bssid, probe_wait_ms); 4787 ieee80211_sta_connection_lost(sdata, bssid, 4788 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4789 } else if (ifmgd->probe_send_count < max_tries) { 4790 mlme_dbg(sdata, 4791 "No probe response from AP %pM after %dms, try %d/%i\n", 4792 bssid, probe_wait_ms, 4793 ifmgd->probe_send_count, max_tries); 4794 ieee80211_mgd_probe_ap_send(sdata); 4795 } else { 4796 /* 4797 * We actually lost the connection ... or did we? 4798 * Let's make sure! 4799 */ 4800 mlme_dbg(sdata, 4801 "No probe response from AP %pM after %dms, disconnecting.\n", 4802 bssid, probe_wait_ms); 4803 4804 ieee80211_sta_connection_lost(sdata, bssid, 4805 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4806 } 4807 } 4808 4809 sdata_unlock(sdata); 4810 } 4811 4812 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4813 { 4814 struct ieee80211_sub_if_data *sdata = 4815 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4817 4818 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4819 return; 4820 4821 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4822 return; 4823 4824 sdata->u.mgd.connection_loss = false; 4825 ieee80211_queue_work(&sdata->local->hw, 4826 &sdata->u.mgd.beacon_connection_loss_work); 4827 } 4828 4829 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4830 { 4831 struct ieee80211_sub_if_data *sdata = 4832 from_timer(sdata, t, u.mgd.conn_mon_timer); 4833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4834 struct ieee80211_local *local = sdata->local; 4835 struct sta_info *sta; 4836 unsigned long timeout; 4837 4838 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4839 return; 4840 4841 sta = sta_info_get(sdata, ifmgd->bssid); 4842 if (!sta) 4843 return; 4844 4845 timeout = sta->status_stats.last_ack; 4846 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4847 timeout = sta->rx_stats.last_rx; 4848 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4849 4850 /* If timeout is after now, then update timer to fire at 4851 * the later date, but do not actually probe at this time. 4852 */ 4853 if (time_is_after_jiffies(timeout)) { 4854 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4855 return; 4856 } 4857 4858 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4859 } 4860 4861 static void ieee80211_sta_monitor_work(struct work_struct *work) 4862 { 4863 struct ieee80211_sub_if_data *sdata = 4864 container_of(work, struct ieee80211_sub_if_data, 4865 u.mgd.monitor_work); 4866 4867 ieee80211_mgd_probe_ap(sdata, false); 4868 } 4869 4870 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4871 { 4872 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4873 __ieee80211_stop_poll(sdata); 4874 4875 /* let's probe the connection once */ 4876 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4877 ieee80211_queue_work(&sdata->local->hw, 4878 &sdata->u.mgd.monitor_work); 4879 } 4880 } 4881 4882 #ifdef CONFIG_PM 4883 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4884 { 4885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4886 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4887 4888 sdata_lock(sdata); 4889 4890 if (ifmgd->auth_data || ifmgd->assoc_data) { 4891 const u8 *bssid = ifmgd->auth_data ? 4892 ifmgd->auth_data->bss->bssid : 4893 ifmgd->assoc_data->bss->bssid; 4894 4895 /* 4896 * If we are trying to authenticate / associate while suspending, 4897 * cfg80211 won't know and won't actually abort those attempts, 4898 * thus we need to do that ourselves. 4899 */ 4900 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4901 IEEE80211_STYPE_DEAUTH, 4902 WLAN_REASON_DEAUTH_LEAVING, 4903 false, frame_buf); 4904 if (ifmgd->assoc_data) 4905 ieee80211_destroy_assoc_data(sdata, false, true); 4906 if (ifmgd->auth_data) 4907 ieee80211_destroy_auth_data(sdata, false); 4908 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4909 IEEE80211_DEAUTH_FRAME_LEN, 4910 false); 4911 } 4912 4913 /* This is a bit of a hack - we should find a better and more generic 4914 * solution to this. Normally when suspending, cfg80211 will in fact 4915 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4916 * auth (not so important) or assoc (this is the problem) process. 4917 * 4918 * As a consequence, it can happen that we are in the process of both 4919 * associating and suspending, and receive an association response 4920 * after cfg80211 has checked if it needs to disconnect, but before 4921 * we actually set the flag to drop incoming frames. This will then 4922 * cause the workqueue flush to process the association response in 4923 * the suspend, resulting in a successful association just before it 4924 * tries to remove the interface from the driver, which now though 4925 * has a channel context assigned ... this results in issues. 4926 * 4927 * To work around this (for now) simply deauth here again if we're 4928 * now connected. 4929 */ 4930 if (ifmgd->associated && !sdata->local->wowlan) { 4931 u8 bssid[ETH_ALEN]; 4932 struct cfg80211_deauth_request req = { 4933 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4934 .bssid = bssid, 4935 }; 4936 4937 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4938 ieee80211_mgd_deauth(sdata, &req); 4939 } 4940 4941 sdata_unlock(sdata); 4942 } 4943 #endif 4944 4945 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4946 { 4947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4948 4949 sdata_lock(sdata); 4950 if (!ifmgd->associated) { 4951 sdata_unlock(sdata); 4952 return; 4953 } 4954 4955 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4956 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4957 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4958 ieee80211_sta_connection_lost(sdata, 4959 ifmgd->associated->bssid, 4960 WLAN_REASON_UNSPECIFIED, 4961 true); 4962 sdata_unlock(sdata); 4963 return; 4964 } 4965 4966 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 4967 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 4968 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 4969 ieee80211_sta_connection_lost(sdata, 4970 ifmgd->associated->bssid, 4971 WLAN_REASON_UNSPECIFIED, 4972 true); 4973 sdata_unlock(sdata); 4974 return; 4975 } 4976 4977 sdata_unlock(sdata); 4978 } 4979 4980 /* interface setup */ 4981 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4982 { 4983 struct ieee80211_if_managed *ifmgd; 4984 4985 ifmgd = &sdata->u.mgd; 4986 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4987 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4988 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4989 ieee80211_beacon_connection_loss_work); 4990 INIT_WORK(&ifmgd->csa_connection_drop_work, 4991 ieee80211_csa_connection_drop_work); 4992 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4993 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4994 ieee80211_tdls_peer_del_work); 4995 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4996 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4997 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4998 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4999 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 5000 ieee80211_sta_handle_tspec_ac_params_wk); 5001 5002 ifmgd->flags = 0; 5003 ifmgd->powersave = sdata->wdev.ps; 5004 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 5005 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 5006 ifmgd->p2p_noa_index = -1; 5007 5008 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 5009 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 5010 else 5011 ifmgd->req_smps = IEEE80211_SMPS_OFF; 5012 5013 /* Setup TDLS data */ 5014 spin_lock_init(&ifmgd->teardown_lock); 5015 ifmgd->teardown_skb = NULL; 5016 ifmgd->orig_teardown_skb = NULL; 5017 } 5018 5019 /* scan finished notification */ 5020 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 5021 { 5022 struct ieee80211_sub_if_data *sdata; 5023 5024 /* Restart STA timers */ 5025 rcu_read_lock(); 5026 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 5027 if (ieee80211_sdata_running(sdata)) 5028 ieee80211_restart_sta_timer(sdata); 5029 } 5030 rcu_read_unlock(); 5031 } 5032 5033 static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata, 5034 struct cfg80211_bss *cbss) 5035 { 5036 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5038 const struct element *ht_cap_elem, *vht_cap_elem; 5039 const struct cfg80211_bss_ies *ies; 5040 const struct ieee80211_ht_cap *ht_cap; 5041 const struct ieee80211_vht_cap *vht_cap; 5042 const struct ieee80211_he_cap_elem *he_cap; 5043 const struct element *he_cap_elem; 5044 u16 mcs_80_map, mcs_160_map; 5045 int i, mcs_nss_size; 5046 bool support_160; 5047 u8 chains = 1; 5048 5049 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 5050 return chains; 5051 5052 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5053 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5054 ht_cap = (void *)ht_cap_elem->data; 5055 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5056 /* 5057 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5058 * "Tx Unequal Modulation Supported" fields. 5059 */ 5060 } 5061 5062 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 5063 return chains; 5064 5065 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5066 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5067 u8 nss; 5068 u16 tx_mcs_map; 5069 5070 vht_cap = (void *)vht_cap_elem->data; 5071 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5072 for (nss = 8; nss > 0; nss--) { 5073 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5074 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5075 break; 5076 } 5077 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5078 chains = max(chains, nss); 5079 } 5080 5081 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE) 5082 return chains; 5083 5084 ies = rcu_dereference(cbss->ies); 5085 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5086 ies->data, ies->len); 5087 5088 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5089 return chains; 5090 5091 /* skip one byte ext_tag_id */ 5092 he_cap = (void *)(he_cap_elem->data + 1); 5093 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5094 5095 /* invalid HE IE */ 5096 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5097 return chains; 5098 5099 /* mcs_nss is right after he_cap info */ 5100 he_mcs_nss_supp = (void *)(he_cap + 1); 5101 5102 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5103 5104 for (i = 7; i >= 0; i--) { 5105 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5106 5107 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5108 chains = max_t(u8, chains, i + 1); 5109 break; 5110 } 5111 } 5112 5113 support_160 = he_cap->phy_cap_info[0] & 5114 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5115 5116 if (!support_160) 5117 return chains; 5118 5119 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5120 for (i = 7; i >= 0; i--) { 5121 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5122 5123 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5124 chains = max_t(u8, chains, i + 1); 5125 break; 5126 } 5127 } 5128 5129 return chains; 5130 } 5131 5132 static bool 5133 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5134 const struct cfg80211_bss_ies *ies, 5135 const struct ieee80211_he_operation *he_op) 5136 { 5137 const struct element *he_cap_elem; 5138 const struct ieee80211_he_cap_elem *he_cap; 5139 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5140 u16 mcs_80_map_tx, mcs_80_map_rx; 5141 u16 ap_min_req_set; 5142 int mcs_nss_size; 5143 int nss; 5144 5145 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5146 ies->data, ies->len); 5147 5148 /* invalid HE IE */ 5149 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 5150 sdata_info(sdata, 5151 "Invalid HE elem, Disable HE\n"); 5152 return false; 5153 } 5154 5155 /* skip one byte ext_tag_id */ 5156 he_cap = (void *)(he_cap_elem->data + 1); 5157 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5158 5159 /* invalid HE IE */ 5160 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 5161 sdata_info(sdata, 5162 "Invalid HE elem with nss size, Disable HE\n"); 5163 return false; 5164 } 5165 5166 /* mcs_nss is right after he_cap info */ 5167 he_mcs_nss_supp = (void *)(he_cap + 1); 5168 5169 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5170 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 5171 5172 /* P802.11-REVme/D0.3 5173 * 27.1.1 Introduction to the HE PHY 5174 * ... 5175 * An HE STA shall support the following features: 5176 * ... 5177 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 5178 * supported channel widths for HE SU PPDUs 5179 */ 5180 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 5181 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 5182 sdata_info(sdata, 5183 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 5184 mcs_80_map_tx, mcs_80_map_rx); 5185 return false; 5186 } 5187 5188 if (!he_op) 5189 return true; 5190 5191 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5192 5193 /* make sure the AP is consistent with itself 5194 * 5195 * P802.11-REVme/D0.3 5196 * 26.17.1 Basic HE BSS operation 5197 * 5198 * A STA that is operating in an HE BSS shall be able to receive and 5199 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 5200 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 5201 * MLME-START.request primitive and shall be able to receive at each of 5202 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 5203 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 5204 * primitive 5205 */ 5206 for (nss = 8; nss > 0; nss--) { 5207 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5208 u8 ap_rx_val; 5209 u8 ap_tx_val; 5210 5211 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5212 continue; 5213 5214 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 5215 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 5216 5217 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5218 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5219 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 5220 sdata_info(sdata, 5221 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 5222 nss, ap_rx_val, ap_rx_val, ap_op_val); 5223 return false; 5224 } 5225 } 5226 5227 return true; 5228 } 5229 5230 static bool 5231 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5232 struct ieee80211_supported_band *sband, 5233 const struct ieee80211_he_operation *he_op) 5234 { 5235 const struct ieee80211_sta_he_cap *sta_he_cap = 5236 ieee80211_get_he_iftype_cap(sband, 5237 ieee80211_vif_type_p2p(&sdata->vif)); 5238 u16 ap_min_req_set; 5239 int i; 5240 5241 if (!sta_he_cap || !he_op) 5242 return false; 5243 5244 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5245 5246 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 5247 for (i = 0; i < 3; i++) { 5248 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 5249 &sta_he_cap->he_mcs_nss_supp; 5250 u16 sta_mcs_map_rx = 5251 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 5252 u16 sta_mcs_map_tx = 5253 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 5254 u8 nss; 5255 bool verified = true; 5256 5257 /* 5258 * For each band there is a maximum of 8 spatial streams 5259 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 5260 * of 2 bits per NSS (1-8), with the values defined in enum 5261 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 5262 * capabilities aren't less than the AP's minimum requirements 5263 * for this HE BSS per SS. 5264 * It is enough to find one such band that meets the reqs. 5265 */ 5266 for (nss = 8; nss > 0; nss--) { 5267 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 5268 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 5269 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5270 5271 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5272 continue; 5273 5274 /* 5275 * Make sure the HE AP doesn't require MCSs that aren't 5276 * supported by the client as required by spec 5277 * 5278 * P802.11-REVme/D0.3 5279 * 26.17.1 Basic HE BSS operation 5280 * 5281 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 5282 * a BSS, unless it supports (i.e., is able to both transmit and 5283 * receive using) all of the <HE-MCS, NSS> tuples in the basic 5284 * HE-MCS and NSS set. 5285 */ 5286 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5287 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5288 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 5289 verified = false; 5290 break; 5291 } 5292 } 5293 5294 if (verified) 5295 return true; 5296 } 5297 5298 /* If here, STA doesn't meet AP's HE min requirements */ 5299 return false; 5300 } 5301 5302 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5303 struct cfg80211_bss *cbss) 5304 { 5305 struct ieee80211_local *local = sdata->local; 5306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5307 const struct ieee80211_ht_cap *ht_cap = NULL; 5308 const struct ieee80211_ht_operation *ht_oper = NULL; 5309 const struct ieee80211_vht_operation *vht_oper = NULL; 5310 const struct ieee80211_he_operation *he_oper = NULL; 5311 const struct ieee80211_eht_operation *eht_oper = NULL; 5312 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5313 struct ieee80211_supported_band *sband; 5314 struct cfg80211_chan_def chandef; 5315 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5316 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5317 struct ieee80211_bss *bss = (void *)cbss->priv; 5318 struct ieee802_11_elems *elems; 5319 const struct cfg80211_bss_ies *ies; 5320 int ret; 5321 u32 i; 5322 bool have_80mhz; 5323 5324 rcu_read_lock(); 5325 5326 ies = rcu_dereference(cbss->ies); 5327 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5328 NULL, NULL); 5329 if (!elems) { 5330 rcu_read_unlock(); 5331 return -ENOMEM; 5332 } 5333 5334 sband = local->hw.wiphy->bands[cbss->channel->band]; 5335 5336 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5337 IEEE80211_STA_DISABLE_80P80MHZ | 5338 IEEE80211_STA_DISABLE_160MHZ); 5339 5340 /* disable HT/VHT/HE if we don't support them */ 5341 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5342 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 5343 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5344 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5345 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5346 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5347 } 5348 5349 if (!sband->vht_cap.vht_supported && is_5ghz) { 5350 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 5351 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5352 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5353 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5354 } 5355 5356 if (!ieee80211_get_he_iftype_cap(sband, 5357 ieee80211_vif_type_p2p(&sdata->vif))) { 5358 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 5359 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5360 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5361 } 5362 5363 if (!ieee80211_get_eht_iftype_cap(sband, 5364 ieee80211_vif_type_p2p(&sdata->vif))) { 5365 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 5366 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5367 } 5368 5369 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5370 ht_oper = elems->ht_operation; 5371 ht_cap = elems->ht_cap_elem; 5372 5373 if (!ht_cap) { 5374 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5375 ht_oper = NULL; 5376 } 5377 } 5378 5379 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5380 vht_oper = elems->vht_operation; 5381 if (vht_oper && !ht_oper) { 5382 vht_oper = NULL; 5383 sdata_info(sdata, 5384 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5385 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5386 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5387 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5388 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5389 } 5390 5391 if (!elems->vht_cap_elem) { 5392 sdata_info(sdata, 5393 "bad VHT capabilities, disabling VHT\n"); 5394 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5395 vht_oper = NULL; 5396 } 5397 } 5398 5399 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5400 he_oper = elems->he_operation; 5401 5402 if (is_6ghz) { 5403 struct ieee80211_bss_conf *bss_conf; 5404 u8 i, j = 0; 5405 5406 bss_conf = &sdata->vif.bss_conf; 5407 5408 if (elems->pwr_constr_elem) 5409 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5410 5411 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5412 ARRAY_SIZE(elems->tx_pwr_env)); 5413 5414 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5415 if (elems->tx_pwr_env_len[i] > 5416 sizeof(bss_conf->tx_pwr_env[j])) 5417 continue; 5418 5419 bss_conf->tx_pwr_env_num++; 5420 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5421 elems->tx_pwr_env_len[i]); 5422 j++; 5423 } 5424 } 5425 5426 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 5427 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5428 ifmgd->flags |= IEEE80211_STA_DISABLE_HE | 5429 IEEE80211_STA_DISABLE_EHT; 5430 } 5431 5432 /* 5433 * EHT requires HE to be supported as well. Specifically for 6 GHz 5434 * channels, the operation channel information can only be deduced from 5435 * both the 6 GHz operation information (from the HE operation IE) and 5436 * EHT operation. 5437 */ 5438 if (!(ifmgd->flags & (IEEE80211_STA_DISABLE_HE | 5439 IEEE80211_STA_DISABLE_EHT)) && he_oper) { 5440 const struct cfg80211_bss_ies *ies; 5441 const u8 *eht_oper_ie; 5442 5443 ies = rcu_dereference(cbss->ies); 5444 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 5445 ies->data, ies->len); 5446 if (eht_oper_ie && eht_oper_ie[1] >= 5447 1 + sizeof(struct ieee80211_eht_operation)) 5448 eht_oper = (void *)(eht_oper_ie + 3); 5449 else 5450 eht_oper = NULL; 5451 } 5452 5453 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5454 have_80mhz = false; 5455 for (i = 0; i < sband->n_channels; i++) { 5456 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5457 IEEE80211_CHAN_NO_80MHZ)) 5458 continue; 5459 5460 have_80mhz = true; 5461 break; 5462 } 5463 5464 if (!have_80mhz) { 5465 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5466 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5467 } 5468 5469 if (sband->band == NL80211_BAND_S1GHZ) { 5470 s1g_oper = elems->s1g_oper; 5471 if (!s1g_oper) 5472 sdata_info(sdata, 5473 "AP missing S1G operation element?\n"); 5474 } 5475 5476 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5477 cbss->channel, 5478 bss->vht_cap_info, 5479 ht_oper, vht_oper, 5480 he_oper, eht_oper, 5481 s1g_oper, 5482 &chandef, false); 5483 5484 sdata->needed_rx_chains = min(ieee80211_max_rx_chains(sdata, cbss), 5485 local->rx_chains); 5486 5487 rcu_read_unlock(); 5488 /* the element data was RCU protected so no longer valid anyway */ 5489 kfree(elems); 5490 elems = NULL; 5491 5492 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5493 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5494 return -EINVAL; 5495 } 5496 5497 /* will change later if needed */ 5498 sdata->smps_mode = IEEE80211_SMPS_OFF; 5499 5500 mutex_lock(&local->mtx); 5501 /* 5502 * If this fails (possibly due to channel context sharing 5503 * on incompatible channels, e.g. 80+80 and 160 sharing the 5504 * same control channel) try to use a smaller bandwidth. 5505 */ 5506 ret = ieee80211_vif_use_channel(sdata, &chandef, 5507 IEEE80211_CHANCTX_SHARED); 5508 5509 /* don't downgrade for 5 and 10 MHz channels, though. */ 5510 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5511 chandef.width == NL80211_CHAN_WIDTH_10) 5512 goto out; 5513 5514 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5515 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5516 ret = ieee80211_vif_use_channel(sdata, &chandef, 5517 IEEE80211_CHANCTX_SHARED); 5518 } 5519 out: 5520 mutex_unlock(&local->mtx); 5521 return ret; 5522 } 5523 5524 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5525 u8 *dtim_count, u8 *dtim_period) 5526 { 5527 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5528 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5529 ies->len); 5530 const struct ieee80211_tim_ie *tim = NULL; 5531 const struct ieee80211_bssid_index *idx; 5532 bool valid = tim_ie && tim_ie[1] >= 2; 5533 5534 if (valid) 5535 tim = (void *)(tim_ie + 2); 5536 5537 if (dtim_count) 5538 *dtim_count = valid ? tim->dtim_count : 0; 5539 5540 if (dtim_period) 5541 *dtim_period = valid ? tim->dtim_period : 0; 5542 5543 /* Check if value is overridden by non-transmitted profile */ 5544 if (!idx_ie || idx_ie[1] < 3) 5545 return valid; 5546 5547 idx = (void *)(idx_ie + 2); 5548 5549 if (dtim_count) 5550 *dtim_count = idx->dtim_count; 5551 5552 if (dtim_period) 5553 *dtim_period = idx->dtim_period; 5554 5555 return true; 5556 } 5557 5558 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5559 struct cfg80211_bss *cbss, bool assoc, 5560 bool override) 5561 { 5562 struct ieee80211_local *local = sdata->local; 5563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5564 struct ieee80211_bss *bss = (void *)cbss->priv; 5565 struct sta_info *new_sta = NULL; 5566 struct ieee80211_supported_band *sband; 5567 bool have_sta = false; 5568 int err; 5569 5570 sband = local->hw.wiphy->bands[cbss->channel->band]; 5571 5572 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5573 return -EINVAL; 5574 5575 /* If a reconfig is happening, bail out */ 5576 if (local->in_reconfig) 5577 return -EBUSY; 5578 5579 if (assoc) { 5580 rcu_read_lock(); 5581 have_sta = sta_info_get(sdata, cbss->bssid); 5582 rcu_read_unlock(); 5583 } 5584 5585 if (!have_sta) { 5586 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5587 if (!new_sta) 5588 return -ENOMEM; 5589 } 5590 5591 /* 5592 * Set up the information for the new channel before setting the 5593 * new channel. We can't - completely race-free - change the basic 5594 * rates bitmap and the channel (sband) that it refers to, but if 5595 * we set it up before we at least avoid calling into the driver's 5596 * bss_info_changed() method with invalid information (since we do 5597 * call that from changing the channel - only for IDLE and perhaps 5598 * some others, but ...). 5599 * 5600 * So to avoid that, just set up all the new information before the 5601 * channel, but tell the driver to apply it only afterwards, since 5602 * it might need the new channel for that. 5603 */ 5604 if (new_sta) { 5605 u32 rates = 0, basic_rates = 0; 5606 bool have_higher_than_11mbit = false; 5607 int min_rate = INT_MAX, min_rate_index = -1; 5608 const struct cfg80211_bss_ies *ies; 5609 int shift = ieee80211_vif_get_shift(&sdata->vif); 5610 5611 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5612 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5613 ieee80211_s1g_sta_rate_init(new_sta); 5614 goto skip_rates; 5615 } 5616 5617 ieee80211_get_rates(sband, bss->supp_rates, 5618 bss->supp_rates_len, 5619 &rates, &basic_rates, 5620 &have_higher_than_11mbit, 5621 &min_rate, &min_rate_index, 5622 shift); 5623 5624 /* 5625 * This used to be a workaround for basic rates missing 5626 * in the association response frame. Now that we no 5627 * longer use the basic rates from there, it probably 5628 * doesn't happen any more, but keep the workaround so 5629 * in case some *other* APs are buggy in different ways 5630 * we can connect -- with a warning. 5631 * Allow this workaround only in case the AP provided at least 5632 * one rate. 5633 */ 5634 if (min_rate_index < 0) { 5635 sdata_info(sdata, 5636 "No legacy rates in association response\n"); 5637 5638 sta_info_free(local, new_sta); 5639 return -EINVAL; 5640 } else if (!basic_rates) { 5641 sdata_info(sdata, 5642 "No basic rates, using min rate instead\n"); 5643 basic_rates = BIT(min_rate_index); 5644 } 5645 5646 if (rates) 5647 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5648 else 5649 sdata_info(sdata, 5650 "No rates found, keeping mandatory only\n"); 5651 5652 sdata->vif.bss_conf.basic_rates = basic_rates; 5653 5654 /* cf. IEEE 802.11 9.2.12 */ 5655 if (cbss->channel->band == NL80211_BAND_2GHZ && 5656 have_higher_than_11mbit) 5657 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5658 else 5659 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5660 5661 skip_rates: 5662 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5663 5664 /* set timing information */ 5665 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5666 rcu_read_lock(); 5667 ies = rcu_dereference(cbss->beacon_ies); 5668 if (ies) { 5669 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5670 sdata->vif.bss_conf.sync_device_ts = 5671 bss->device_ts_beacon; 5672 5673 ieee80211_get_dtim(ies, 5674 &sdata->vif.bss_conf.sync_dtim_count, 5675 NULL); 5676 } else if (!ieee80211_hw_check(&sdata->local->hw, 5677 TIMING_BEACON_ONLY)) { 5678 ies = rcu_dereference(cbss->proberesp_ies); 5679 /* must be non-NULL since beacon IEs were NULL */ 5680 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5681 sdata->vif.bss_conf.sync_device_ts = 5682 bss->device_ts_presp; 5683 sdata->vif.bss_conf.sync_dtim_count = 0; 5684 } else { 5685 sdata->vif.bss_conf.sync_tsf = 0; 5686 sdata->vif.bss_conf.sync_device_ts = 0; 5687 sdata->vif.bss_conf.sync_dtim_count = 0; 5688 } 5689 rcu_read_unlock(); 5690 } 5691 5692 if (new_sta || override) { 5693 err = ieee80211_prep_channel(sdata, cbss); 5694 if (err) { 5695 if (new_sta) 5696 sta_info_free(local, new_sta); 5697 return -EINVAL; 5698 } 5699 } 5700 5701 if (new_sta) { 5702 /* 5703 * tell driver about BSSID, basic rates and timing 5704 * this was set up above, before setting the channel 5705 */ 5706 ieee80211_bss_info_change_notify(sdata, 5707 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5708 BSS_CHANGED_BEACON_INT); 5709 5710 if (assoc) 5711 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5712 5713 err = sta_info_insert(new_sta); 5714 new_sta = NULL; 5715 if (err) { 5716 sdata_info(sdata, 5717 "failed to insert STA entry for the AP (error %d)\n", 5718 err); 5719 return err; 5720 } 5721 } else 5722 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5723 5724 /* Cancel scan to ensure that nothing interferes with connection */ 5725 if (local->scanning) 5726 ieee80211_scan_cancel(local); 5727 5728 return 0; 5729 } 5730 5731 /* config hooks */ 5732 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5733 struct cfg80211_auth_request *req) 5734 { 5735 struct ieee80211_local *local = sdata->local; 5736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5737 struct ieee80211_mgd_auth_data *auth_data; 5738 u16 auth_alg; 5739 int err; 5740 bool cont_auth; 5741 5742 /* prepare auth data structure */ 5743 5744 switch (req->auth_type) { 5745 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5746 auth_alg = WLAN_AUTH_OPEN; 5747 break; 5748 case NL80211_AUTHTYPE_SHARED_KEY: 5749 if (fips_enabled) 5750 return -EOPNOTSUPP; 5751 auth_alg = WLAN_AUTH_SHARED_KEY; 5752 break; 5753 case NL80211_AUTHTYPE_FT: 5754 auth_alg = WLAN_AUTH_FT; 5755 break; 5756 case NL80211_AUTHTYPE_NETWORK_EAP: 5757 auth_alg = WLAN_AUTH_LEAP; 5758 break; 5759 case NL80211_AUTHTYPE_SAE: 5760 auth_alg = WLAN_AUTH_SAE; 5761 break; 5762 case NL80211_AUTHTYPE_FILS_SK: 5763 auth_alg = WLAN_AUTH_FILS_SK; 5764 break; 5765 case NL80211_AUTHTYPE_FILS_SK_PFS: 5766 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5767 break; 5768 case NL80211_AUTHTYPE_FILS_PK: 5769 auth_alg = WLAN_AUTH_FILS_PK; 5770 break; 5771 default: 5772 return -EOPNOTSUPP; 5773 } 5774 5775 if (ifmgd->assoc_data) 5776 return -EBUSY; 5777 5778 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5779 req->ie_len, GFP_KERNEL); 5780 if (!auth_data) 5781 return -ENOMEM; 5782 5783 auth_data->bss = req->bss; 5784 5785 if (req->auth_data_len >= 4) { 5786 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5787 __le16 *pos = (__le16 *) req->auth_data; 5788 5789 auth_data->sae_trans = le16_to_cpu(pos[0]); 5790 auth_data->sae_status = le16_to_cpu(pos[1]); 5791 } 5792 memcpy(auth_data->data, req->auth_data + 4, 5793 req->auth_data_len - 4); 5794 auth_data->data_len += req->auth_data_len - 4; 5795 } 5796 5797 /* Check if continuing authentication or trying to authenticate with the 5798 * same BSS that we were in the process of authenticating with and avoid 5799 * removal and re-addition of the STA entry in 5800 * ieee80211_prep_connection(). 5801 */ 5802 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5803 5804 if (req->ie && req->ie_len) { 5805 memcpy(&auth_data->data[auth_data->data_len], 5806 req->ie, req->ie_len); 5807 auth_data->data_len += req->ie_len; 5808 } 5809 5810 if (req->key && req->key_len) { 5811 auth_data->key_len = req->key_len; 5812 auth_data->key_idx = req->key_idx; 5813 memcpy(auth_data->key, req->key, req->key_len); 5814 } 5815 5816 auth_data->algorithm = auth_alg; 5817 5818 /* try to authenticate/probe */ 5819 5820 if (ifmgd->auth_data) { 5821 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5822 auth_data->peer_confirmed = 5823 ifmgd->auth_data->peer_confirmed; 5824 } 5825 ieee80211_destroy_auth_data(sdata, cont_auth); 5826 } 5827 5828 /* prep auth_data so we don't go into idle on disassoc */ 5829 ifmgd->auth_data = auth_data; 5830 5831 /* If this is continuation of an ongoing SAE authentication exchange 5832 * (i.e., request to send SAE Confirm) and the peer has already 5833 * confirmed, mark authentication completed since we are about to send 5834 * out SAE Confirm. 5835 */ 5836 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5837 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5838 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5839 5840 if (ifmgd->associated) { 5841 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5842 5843 sdata_info(sdata, 5844 "disconnect from AP %pM for new auth to %pM\n", 5845 ifmgd->associated->bssid, req->bss->bssid); 5846 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5847 WLAN_REASON_UNSPECIFIED, 5848 false, frame_buf); 5849 5850 ieee80211_report_disconnect(sdata, frame_buf, 5851 sizeof(frame_buf), true, 5852 WLAN_REASON_UNSPECIFIED, 5853 false); 5854 } 5855 5856 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5857 5858 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5859 if (err) 5860 goto err_clear; 5861 5862 err = ieee80211_auth(sdata); 5863 if (err) { 5864 sta_info_destroy_addr(sdata, req->bss->bssid); 5865 goto err_clear; 5866 } 5867 5868 /* hold our own reference */ 5869 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5870 return 0; 5871 5872 err_clear: 5873 eth_zero_addr(ifmgd->bssid); 5874 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5875 ifmgd->auth_data = NULL; 5876 mutex_lock(&sdata->local->mtx); 5877 ieee80211_vif_release_channel(sdata); 5878 mutex_unlock(&sdata->local->mtx); 5879 kfree(auth_data); 5880 return err; 5881 } 5882 5883 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5884 struct cfg80211_assoc_request *req) 5885 { 5886 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5887 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5888 struct ieee80211_local *local = sdata->local; 5889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5890 struct ieee80211_bss *bss = (void *)req->bss->priv; 5891 struct ieee80211_mgd_assoc_data *assoc_data; 5892 const struct cfg80211_bss_ies *beacon_ies; 5893 struct ieee80211_supported_band *sband; 5894 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5895 const struct element *ssid_elem, *ht_elem, *vht_elem; 5896 int i, err; 5897 bool override = false; 5898 5899 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5900 if (!assoc_data) 5901 return -ENOMEM; 5902 5903 rcu_read_lock(); 5904 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5905 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5906 rcu_read_unlock(); 5907 kfree(assoc_data); 5908 return -EINVAL; 5909 } 5910 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5911 assoc_data->ssid_len = ssid_elem->datalen; 5912 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5913 bss_conf->ssid_len = assoc_data->ssid_len; 5914 rcu_read_unlock(); 5915 5916 if (ifmgd->associated) { 5917 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5918 5919 sdata_info(sdata, 5920 "disconnect from AP %pM for new assoc to %pM\n", 5921 ifmgd->associated->bssid, req->bss->bssid); 5922 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5923 WLAN_REASON_UNSPECIFIED, 5924 false, frame_buf); 5925 5926 ieee80211_report_disconnect(sdata, frame_buf, 5927 sizeof(frame_buf), true, 5928 WLAN_REASON_UNSPECIFIED, 5929 false); 5930 } 5931 5932 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5933 err = -EBUSY; 5934 goto err_free; 5935 } 5936 5937 if (ifmgd->assoc_data) { 5938 err = -EBUSY; 5939 goto err_free; 5940 } 5941 5942 if (ifmgd->auth_data) { 5943 bool match; 5944 5945 /* keep sta info, bssid if matching */ 5946 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5947 ieee80211_destroy_auth_data(sdata, match); 5948 } 5949 5950 /* prepare assoc data */ 5951 5952 ifmgd->beacon_crc_valid = false; 5953 5954 assoc_data->wmm = bss->wmm_used && 5955 (local->hw.queues >= IEEE80211_NUM_ACS); 5956 5957 /* 5958 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5959 * We still associate in non-HT mode (11a/b/g) if any one of these 5960 * ciphers is configured as pairwise. 5961 * We can set this to true for non-11n hardware, that'll be checked 5962 * separately along with the peer capabilities. 5963 */ 5964 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5965 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5966 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5967 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5968 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5969 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5970 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5971 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5972 netdev_info(sdata->dev, 5973 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5974 } 5975 } 5976 5977 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5978 5979 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 5980 if (!bss->wmm_used) { 5981 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5982 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5983 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5984 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5985 netdev_info(sdata->dev, 5986 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5987 } 5988 5989 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5990 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5991 sizeof(ifmgd->ht_capa_mask)); 5992 5993 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5994 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5995 sizeof(ifmgd->vht_capa_mask)); 5996 5997 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5998 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5999 sizeof(ifmgd->s1g_capa_mask)); 6000 6001 if (req->ie && req->ie_len) { 6002 memcpy(assoc_data->ie, req->ie, req->ie_len); 6003 assoc_data->ie_len = req->ie_len; 6004 } 6005 6006 if (req->fils_kek) { 6007 /* should already be checked in cfg80211 - so warn */ 6008 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 6009 err = -EINVAL; 6010 goto err_free; 6011 } 6012 memcpy(assoc_data->fils_kek, req->fils_kek, 6013 req->fils_kek_len); 6014 assoc_data->fils_kek_len = req->fils_kek_len; 6015 } 6016 6017 if (req->fils_nonces) 6018 memcpy(assoc_data->fils_nonces, req->fils_nonces, 6019 2 * FILS_NONCE_LEN); 6020 6021 assoc_data->bss = req->bss; 6022 assoc_data->capability = req->bss->capability; 6023 assoc_data->supp_rates = bss->supp_rates; 6024 assoc_data->supp_rates_len = bss->supp_rates_len; 6025 6026 rcu_read_lock(); 6027 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 6028 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6029 assoc_data->ap_ht_param = 6030 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6031 else if (!is_6ghz) 6032 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 6033 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 6034 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6035 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 6036 sizeof(struct ieee80211_vht_cap)); 6037 } else if (is_5ghz) { 6038 sdata_info(sdata, 6039 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6040 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 6041 IEEE80211_STA_DISABLE_HE | 6042 IEEE80211_STA_DISABLE_EHT; 6043 } 6044 rcu_read_unlock(); 6045 6046 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 6047 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 6048 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 6049 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 6050 6051 if (bss->wmm_used && bss->uapsd_supported && 6052 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 6053 assoc_data->uapsd = true; 6054 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 6055 } else { 6056 assoc_data->uapsd = false; 6057 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 6058 } 6059 6060 if (req->prev_bssid) 6061 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 6062 6063 if (req->use_mfp) { 6064 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 6065 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 6066 } else { 6067 ifmgd->mfp = IEEE80211_MFP_DISABLED; 6068 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 6069 } 6070 6071 if (req->flags & ASSOC_REQ_USE_RRM) 6072 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 6073 else 6074 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 6075 6076 if (req->crypto.control_port) 6077 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 6078 else 6079 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 6080 6081 sdata->control_port_protocol = req->crypto.control_port_ethertype; 6082 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 6083 sdata->control_port_over_nl80211 = 6084 req->crypto.control_port_over_nl80211; 6085 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 6086 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 6087 sdata->vif.type); 6088 6089 /* kick off associate process */ 6090 6091 ifmgd->assoc_data = assoc_data; 6092 ifmgd->dtim_period = 0; 6093 ifmgd->have_beacon = false; 6094 6095 /* override HT/VHT configuration only if the AP and we support it */ 6096 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 6097 struct ieee80211_sta_ht_cap sta_ht_cap; 6098 6099 if (req->flags & ASSOC_REQ_DISABLE_HT) 6100 override = true; 6101 6102 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6103 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6104 6105 /* check for 40 MHz disable override */ 6106 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 6107 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 6108 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 6109 override = true; 6110 6111 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 6112 req->flags & ASSOC_REQ_DISABLE_VHT) 6113 override = true; 6114 } 6115 6116 if (req->flags & ASSOC_REQ_DISABLE_HT) { 6117 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 6118 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 6119 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 6120 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 6121 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 6122 } 6123 6124 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 6125 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 6126 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 6127 } 6128 6129 if (req->flags & ASSOC_REQ_DISABLE_HE) { 6130 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 6131 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 6132 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 6133 } 6134 6135 err = ieee80211_prep_connection(sdata, req->bss, true, override); 6136 if (err) 6137 goto err_clear; 6138 6139 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 6140 if (ifmgd->powersave) 6141 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 6142 else 6143 sdata->smps_mode = IEEE80211_SMPS_OFF; 6144 } else { 6145 sdata->smps_mode = ifmgd->req_smps; 6146 } 6147 6148 rcu_read_lock(); 6149 beacon_ies = rcu_dereference(req->bss->beacon_ies); 6150 6151 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 6152 !beacon_ies) { 6153 /* 6154 * Wait up to one beacon interval ... 6155 * should this be more if we miss one? 6156 */ 6157 sdata_info(sdata, "waiting for beacon from %pM\n", 6158 ifmgd->bssid); 6159 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 6160 assoc_data->timeout_started = true; 6161 assoc_data->need_beacon = true; 6162 } else if (beacon_ies) { 6163 const struct element *elem; 6164 u8 dtim_count = 0; 6165 6166 ieee80211_get_dtim(beacon_ies, &dtim_count, 6167 &ifmgd->dtim_period); 6168 6169 ifmgd->have_beacon = true; 6170 assoc_data->timeout = jiffies; 6171 assoc_data->timeout_started = true; 6172 6173 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6174 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 6175 sdata->vif.bss_conf.sync_device_ts = 6176 bss->device_ts_beacon; 6177 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 6178 } 6179 6180 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6181 beacon_ies->data, beacon_ies->len); 6182 if (elem && elem->datalen >= 3) 6183 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 6184 else 6185 sdata->vif.bss_conf.profile_periodicity = 0; 6186 6187 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6188 beacon_ies->data, beacon_ies->len); 6189 if (elem && elem->datalen >= 11 && 6190 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6191 sdata->vif.bss_conf.ema_ap = true; 6192 else 6193 sdata->vif.bss_conf.ema_ap = false; 6194 } else { 6195 assoc_data->timeout = jiffies; 6196 assoc_data->timeout_started = true; 6197 } 6198 rcu_read_unlock(); 6199 6200 run_again(sdata, assoc_data->timeout); 6201 6202 if (bss->corrupt_data) { 6203 char *corrupt_type = "data"; 6204 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6205 if (bss->corrupt_data & 6206 IEEE80211_BSS_CORRUPT_PROBE_RESP) 6207 corrupt_type = "beacon and probe response"; 6208 else 6209 corrupt_type = "beacon"; 6210 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6211 corrupt_type = "probe response"; 6212 sdata_info(sdata, "associating with AP with corrupt %s\n", 6213 corrupt_type); 6214 } 6215 6216 return 0; 6217 err_clear: 6218 eth_zero_addr(ifmgd->bssid); 6219 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 6220 ifmgd->assoc_data = NULL; 6221 err_free: 6222 kfree(assoc_data); 6223 return err; 6224 } 6225 6226 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 6227 struct cfg80211_deauth_request *req) 6228 { 6229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6230 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6231 bool tx = !req->local_state_change; 6232 struct ieee80211_prep_tx_info info = { 6233 .subtype = IEEE80211_STYPE_DEAUTH, 6234 }; 6235 6236 if (ifmgd->auth_data && 6237 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 6238 sdata_info(sdata, 6239 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 6240 req->bssid, req->reason_code, 6241 ieee80211_get_reason_code_string(req->reason_code)); 6242 6243 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6244 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6245 IEEE80211_STYPE_DEAUTH, 6246 req->reason_code, tx, 6247 frame_buf); 6248 ieee80211_destroy_auth_data(sdata, false); 6249 ieee80211_report_disconnect(sdata, frame_buf, 6250 sizeof(frame_buf), true, 6251 req->reason_code, false); 6252 drv_mgd_complete_tx(sdata->local, sdata, &info); 6253 return 0; 6254 } 6255 6256 if (ifmgd->assoc_data && 6257 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 6258 sdata_info(sdata, 6259 "aborting association with %pM by local choice (Reason: %u=%s)\n", 6260 req->bssid, req->reason_code, 6261 ieee80211_get_reason_code_string(req->reason_code)); 6262 6263 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6264 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6265 IEEE80211_STYPE_DEAUTH, 6266 req->reason_code, tx, 6267 frame_buf); 6268 ieee80211_destroy_assoc_data(sdata, false, true); 6269 ieee80211_report_disconnect(sdata, frame_buf, 6270 sizeof(frame_buf), true, 6271 req->reason_code, false); 6272 return 0; 6273 } 6274 6275 if (ifmgd->associated && 6276 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 6277 sdata_info(sdata, 6278 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 6279 req->bssid, req->reason_code, 6280 ieee80211_get_reason_code_string(req->reason_code)); 6281 6282 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6283 req->reason_code, tx, frame_buf); 6284 ieee80211_report_disconnect(sdata, frame_buf, 6285 sizeof(frame_buf), true, 6286 req->reason_code, false); 6287 drv_mgd_complete_tx(sdata->local, sdata, &info); 6288 return 0; 6289 } 6290 6291 return -ENOTCONN; 6292 } 6293 6294 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 6295 struct cfg80211_disassoc_request *req) 6296 { 6297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6298 u8 bssid[ETH_ALEN]; 6299 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6300 6301 /* 6302 * cfg80211 should catch this ... but it's racy since 6303 * we can receive a disassoc frame, process it, hand it 6304 * to cfg80211 while that's in a locked section already 6305 * trying to tell us that the user wants to disconnect. 6306 */ 6307 if (ifmgd->associated != req->bss) 6308 return -ENOLINK; 6309 6310 sdata_info(sdata, 6311 "disassociating from %pM by local choice (Reason: %u=%s)\n", 6312 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 6313 6314 memcpy(bssid, req->bss->bssid, ETH_ALEN); 6315 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 6316 req->reason_code, !req->local_state_change, 6317 frame_buf); 6318 6319 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6320 req->reason_code, false); 6321 6322 return 0; 6323 } 6324 6325 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 6326 { 6327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6328 6329 /* 6330 * Make sure some work items will not run after this, 6331 * they will not do anything but might not have been 6332 * cancelled when disconnecting. 6333 */ 6334 cancel_work_sync(&ifmgd->monitor_work); 6335 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 6336 cancel_work_sync(&ifmgd->request_smps_work); 6337 cancel_work_sync(&ifmgd->csa_connection_drop_work); 6338 cancel_work_sync(&ifmgd->chswitch_work); 6339 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 6340 6341 sdata_lock(sdata); 6342 if (ifmgd->assoc_data) { 6343 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 6344 ieee80211_destroy_assoc_data(sdata, false, false); 6345 cfg80211_assoc_timeout(sdata->dev, bss); 6346 } 6347 if (ifmgd->auth_data) 6348 ieee80211_destroy_auth_data(sdata, false); 6349 spin_lock_bh(&ifmgd->teardown_lock); 6350 if (ifmgd->teardown_skb) { 6351 kfree_skb(ifmgd->teardown_skb); 6352 ifmgd->teardown_skb = NULL; 6353 ifmgd->orig_teardown_skb = NULL; 6354 } 6355 kfree(ifmgd->assoc_req_ies); 6356 ifmgd->assoc_req_ies = NULL; 6357 ifmgd->assoc_req_ies_len = 0; 6358 spin_unlock_bh(&ifmgd->teardown_lock); 6359 del_timer_sync(&ifmgd->timer); 6360 sdata_unlock(sdata); 6361 } 6362 6363 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6364 enum nl80211_cqm_rssi_threshold_event rssi_event, 6365 s32 rssi_level, 6366 gfp_t gfp) 6367 { 6368 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6369 6370 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6371 6372 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6373 } 6374 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6375 6376 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6377 { 6378 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6379 6380 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6381 6382 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6383 } 6384 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6385