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 - 2022 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 sdata->deflink.u.mgd.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 sdata->deflink.u.mgd.bssid, flags, ifmgd->flags); 479 return -EINVAL; 480 } 481 482 ret = ieee80211_link_change_bandwidth(&sdata->deflink, &chandef, changed); 483 484 if (ret) { 485 sdata_info(sdata, 486 "AP %pM changed bandwidth to incompatible one - disconnect\n", 487 sdata->deflink.u.mgd.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.bss_conf.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.bss_conf.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.bss_conf.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.bss_conf.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.bss_conf.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->deflink.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->deflink.u.mgd.bssid, ETH_ALEN); 1205 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1206 memcpy(nullfunc->addr3, sdata->deflink.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.bss_conf.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->deflink.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->deflink.reserved_ready) 1249 goto out; 1250 1251 ret = ieee80211_link_use_reserved_context(&sdata->deflink); 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->deflink.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 sdata->deflink.u.mgd.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.bss_conf.csa_active); 1293 1294 if (sdata->deflink.csa_block_tx) { 1295 ieee80211_wake_vif_queues(local, sdata, 1296 IEEE80211_QUEUE_STOP_REASON_CSA); 1297 sdata->deflink.csa_block_tx = false; 1298 } 1299 1300 sdata->vif.bss_conf.csa_active = false; 1301 sdata->deflink.u.mgd.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 sdata->deflink.u.mgd.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->deflink.reserved_chandef, 1318 0); 1319 } 1320 1321 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1322 { 1323 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1325 1326 trace_api_chswitch_done(sdata, success); 1327 if (!success) { 1328 sdata_info(sdata, 1329 "driver channel switch failed, disconnecting\n"); 1330 ieee80211_queue_work(&sdata->local->hw, 1331 &ifmgd->csa_connection_drop_work); 1332 } else { 1333 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1334 } 1335 } 1336 EXPORT_SYMBOL(ieee80211_chswitch_done); 1337 1338 static void ieee80211_chswitch_timer(struct timer_list *t) 1339 { 1340 struct ieee80211_sub_if_data *sdata = 1341 from_timer(sdata, t, u.mgd.chswitch_timer); 1342 1343 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1344 } 1345 1346 static void 1347 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1348 { 1349 struct ieee80211_local *local = sdata->local; 1350 1351 if (!local->ops->abort_channel_switch) 1352 return; 1353 1354 mutex_lock(&local->mtx); 1355 1356 mutex_lock(&local->chanctx_mtx); 1357 ieee80211_link_unreserve_chanctx(&sdata->deflink); 1358 mutex_unlock(&local->chanctx_mtx); 1359 1360 if (sdata->deflink.csa_block_tx) 1361 ieee80211_wake_vif_queues(local, sdata, 1362 IEEE80211_QUEUE_STOP_REASON_CSA); 1363 1364 sdata->deflink.csa_block_tx = false; 1365 sdata->vif.bss_conf.csa_active = false; 1366 1367 mutex_unlock(&local->mtx); 1368 1369 drv_abort_channel_switch(sdata); 1370 } 1371 1372 static void 1373 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1374 u64 timestamp, u32 device_timestamp, 1375 struct ieee802_11_elems *elems, 1376 bool beacon) 1377 { 1378 struct ieee80211_local *local = sdata->local; 1379 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1380 struct cfg80211_bss *cbss = sdata->deflink.u.mgd.bss; 1381 struct ieee80211_chanctx_conf *conf; 1382 struct ieee80211_chanctx *chanctx; 1383 enum nl80211_band current_band; 1384 struct ieee80211_csa_ie csa_ie; 1385 struct ieee80211_channel_switch ch_switch; 1386 struct ieee80211_bss *bss; 1387 int res; 1388 1389 sdata_assert_lock(sdata); 1390 1391 if (!cbss) 1392 return; 1393 1394 if (local->scanning) 1395 return; 1396 1397 current_band = cbss->channel->band; 1398 bss = (void *)cbss->priv; 1399 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1400 bss->vht_cap_info, 1401 ifmgd->flags, 1402 sdata->deflink.u.mgd.bssid, &csa_ie); 1403 1404 if (!res) { 1405 ch_switch.timestamp = timestamp; 1406 ch_switch.device_timestamp = device_timestamp; 1407 ch_switch.block_tx = csa_ie.mode; 1408 ch_switch.chandef = csa_ie.chandef; 1409 ch_switch.count = csa_ie.count; 1410 ch_switch.delay = csa_ie.max_switch_time; 1411 } 1412 1413 if (res < 0) 1414 goto lock_and_drop_connection; 1415 1416 if (beacon && sdata->vif.bss_conf.csa_active && 1417 !sdata->deflink.u.mgd.csa_waiting_bcn) { 1418 if (res) 1419 ieee80211_sta_abort_chanswitch(sdata); 1420 else 1421 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1422 return; 1423 } else if (sdata->vif.bss_conf.csa_active || res) { 1424 /* disregard subsequent announcements if already processing */ 1425 return; 1426 } 1427 1428 if (sdata->vif.bss_conf.chandef.chan->band != 1429 csa_ie.chandef.chan->band) { 1430 sdata_info(sdata, 1431 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1432 sdata->deflink.u.mgd.bssid, 1433 csa_ie.chandef.chan->center_freq, 1434 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1435 csa_ie.chandef.center_freq2); 1436 goto lock_and_drop_connection; 1437 } 1438 1439 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1440 IEEE80211_CHAN_DISABLED)) { 1441 sdata_info(sdata, 1442 "AP %pM switches to unsupported channel " 1443 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1444 "disconnecting\n", 1445 sdata->deflink.u.mgd.bssid, 1446 csa_ie.chandef.chan->center_freq, 1447 csa_ie.chandef.chan->freq_offset, 1448 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1449 csa_ie.chandef.freq1_offset, 1450 csa_ie.chandef.center_freq2); 1451 goto lock_and_drop_connection; 1452 } 1453 1454 if (cfg80211_chandef_identical(&csa_ie.chandef, 1455 &sdata->vif.bss_conf.chandef) && 1456 (!csa_ie.mode || !beacon)) { 1457 if (sdata->deflink.u.mgd.csa_ignored_same_chan) 1458 return; 1459 sdata_info(sdata, 1460 "AP %pM tries to chanswitch to same channel, ignore\n", 1461 sdata->deflink.u.mgd.bssid); 1462 sdata->deflink.u.mgd.csa_ignored_same_chan = true; 1463 return; 1464 } 1465 1466 /* 1467 * Drop all TDLS peers - either we disconnect or move to a different 1468 * channel from this point on. There's no telling what our peer will do. 1469 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1470 * have an incompatible wider chandef. 1471 */ 1472 ieee80211_teardown_tdls_peers(sdata); 1473 1474 mutex_lock(&local->mtx); 1475 mutex_lock(&local->chanctx_mtx); 1476 conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf, 1477 lockdep_is_held(&local->chanctx_mtx)); 1478 if (!conf) { 1479 sdata_info(sdata, 1480 "no channel context assigned to vif?, disconnecting\n"); 1481 goto drop_connection; 1482 } 1483 1484 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1485 1486 if (local->use_chanctx && 1487 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1488 sdata_info(sdata, 1489 "driver doesn't support chan-switch with channel contexts\n"); 1490 goto drop_connection; 1491 } 1492 1493 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1494 sdata_info(sdata, 1495 "preparing for channel switch failed, disconnecting\n"); 1496 goto drop_connection; 1497 } 1498 1499 res = ieee80211_link_reserve_chanctx(&sdata->deflink, &csa_ie.chandef, 1500 chanctx->mode, false); 1501 if (res) { 1502 sdata_info(sdata, 1503 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1504 res); 1505 goto drop_connection; 1506 } 1507 mutex_unlock(&local->chanctx_mtx); 1508 1509 sdata->vif.bss_conf.csa_active = true; 1510 sdata->deflink.csa_chandef = csa_ie.chandef; 1511 sdata->deflink.csa_block_tx = csa_ie.mode; 1512 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 1513 sdata->deflink.u.mgd.beacon_crc_valid = false; 1514 1515 if (sdata->deflink.csa_block_tx) 1516 ieee80211_stop_vif_queues(local, sdata, 1517 IEEE80211_QUEUE_STOP_REASON_CSA); 1518 mutex_unlock(&local->mtx); 1519 1520 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1521 csa_ie.count, csa_ie.mode); 1522 1523 if (local->ops->channel_switch) { 1524 /* use driver's channel switch callback */ 1525 drv_channel_switch(local, sdata, &ch_switch); 1526 return; 1527 } 1528 1529 /* channel switch handled in software */ 1530 if (csa_ie.count <= 1) 1531 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1532 else 1533 mod_timer(&ifmgd->chswitch_timer, 1534 TU_TO_EXP_TIME((csa_ie.count - 1) * 1535 cbss->beacon_interval)); 1536 return; 1537 lock_and_drop_connection: 1538 mutex_lock(&local->mtx); 1539 mutex_lock(&local->chanctx_mtx); 1540 drop_connection: 1541 /* 1542 * This is just so that the disconnect flow will know that 1543 * we were trying to switch channel and failed. In case the 1544 * mode is 1 (we are not allowed to Tx), we will know not to 1545 * send a deauthentication frame. Those two fields will be 1546 * reset when the disconnection worker runs. 1547 */ 1548 sdata->vif.bss_conf.csa_active = true; 1549 sdata->deflink.csa_block_tx = csa_ie.mode; 1550 1551 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1552 mutex_unlock(&local->chanctx_mtx); 1553 mutex_unlock(&local->mtx); 1554 } 1555 1556 static bool 1557 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1558 struct ieee80211_channel *channel, 1559 const u8 *country_ie, u8 country_ie_len, 1560 const u8 *pwr_constr_elem, 1561 int *chan_pwr, int *pwr_reduction) 1562 { 1563 struct ieee80211_country_ie_triplet *triplet; 1564 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1565 int i, chan_increment; 1566 bool have_chan_pwr = false; 1567 1568 /* Invalid IE */ 1569 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1570 return false; 1571 1572 triplet = (void *)(country_ie + 3); 1573 country_ie_len -= 3; 1574 1575 switch (channel->band) { 1576 default: 1577 WARN_ON_ONCE(1); 1578 fallthrough; 1579 case NL80211_BAND_2GHZ: 1580 case NL80211_BAND_60GHZ: 1581 case NL80211_BAND_LC: 1582 chan_increment = 1; 1583 break; 1584 case NL80211_BAND_5GHZ: 1585 chan_increment = 4; 1586 break; 1587 case NL80211_BAND_6GHZ: 1588 /* 1589 * In the 6 GHz band, the "maximum transmit power level" 1590 * field in the triplets is reserved, and thus will be 1591 * zero and we shouldn't use it to control TX power. 1592 * The actual TX power will be given in the transmit 1593 * power envelope element instead. 1594 */ 1595 return false; 1596 } 1597 1598 /* find channel */ 1599 while (country_ie_len >= 3) { 1600 u8 first_channel = triplet->chans.first_channel; 1601 1602 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1603 goto next; 1604 1605 for (i = 0; i < triplet->chans.num_channels; i++) { 1606 if (first_channel + i * chan_increment == chan) { 1607 have_chan_pwr = true; 1608 *chan_pwr = triplet->chans.max_power; 1609 break; 1610 } 1611 } 1612 if (have_chan_pwr) 1613 break; 1614 1615 next: 1616 triplet++; 1617 country_ie_len -= 3; 1618 } 1619 1620 if (have_chan_pwr && pwr_constr_elem) 1621 *pwr_reduction = *pwr_constr_elem; 1622 else 1623 *pwr_reduction = 0; 1624 1625 return have_chan_pwr; 1626 } 1627 1628 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1629 struct ieee80211_channel *channel, 1630 const u8 *cisco_dtpc_ie, 1631 int *pwr_level) 1632 { 1633 /* From practical testing, the first data byte of the DTPC element 1634 * seems to contain the requested dBm level, and the CLI on Cisco 1635 * APs clearly state the range is -127 to 127 dBm, which indicates 1636 * a signed byte, although it seemingly never actually goes negative. 1637 * The other byte seems to always be zero. 1638 */ 1639 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1640 } 1641 1642 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1643 struct ieee80211_channel *channel, 1644 struct ieee80211_mgmt *mgmt, 1645 const u8 *country_ie, u8 country_ie_len, 1646 const u8 *pwr_constr_ie, 1647 const u8 *cisco_dtpc_ie) 1648 { 1649 bool has_80211h_pwr = false, has_cisco_pwr = false; 1650 int chan_pwr = 0, pwr_reduction_80211h = 0; 1651 int pwr_level_cisco, pwr_level_80211h; 1652 int new_ap_level; 1653 __le16 capab = mgmt->u.probe_resp.capab_info; 1654 1655 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1656 return 0; /* TODO */ 1657 1658 if (country_ie && 1659 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1660 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1661 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1662 sdata, channel, country_ie, country_ie_len, 1663 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1664 pwr_level_80211h = 1665 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1666 } 1667 1668 if (cisco_dtpc_ie) { 1669 ieee80211_find_cisco_dtpc( 1670 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1671 has_cisco_pwr = true; 1672 } 1673 1674 if (!has_80211h_pwr && !has_cisco_pwr) 1675 return 0; 1676 1677 /* If we have both 802.11h and Cisco DTPC, apply both limits 1678 * by picking the smallest of the two power levels advertised. 1679 */ 1680 if (has_80211h_pwr && 1681 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1682 new_ap_level = pwr_level_80211h; 1683 1684 if (sdata->deflink.ap_power_level == new_ap_level) 1685 return 0; 1686 1687 sdata_dbg(sdata, 1688 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1689 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1690 sdata->deflink.u.mgd.bssid); 1691 } else { /* has_cisco_pwr is always true here. */ 1692 new_ap_level = pwr_level_cisco; 1693 1694 if (sdata->deflink.ap_power_level == new_ap_level) 1695 return 0; 1696 1697 sdata_dbg(sdata, 1698 "Limiting TX power to %d dBm as advertised by %pM\n", 1699 pwr_level_cisco, sdata->deflink.u.mgd.bssid); 1700 } 1701 1702 sdata->deflink.ap_power_level = new_ap_level; 1703 if (__ieee80211_recalc_txpower(sdata)) 1704 return BSS_CHANGED_TXPOWER; 1705 return 0; 1706 } 1707 1708 /* powersave */ 1709 static void ieee80211_enable_ps(struct ieee80211_local *local, 1710 struct ieee80211_sub_if_data *sdata) 1711 { 1712 struct ieee80211_conf *conf = &local->hw.conf; 1713 1714 /* 1715 * If we are scanning right now then the parameters will 1716 * take effect when scan finishes. 1717 */ 1718 if (local->scanning) 1719 return; 1720 1721 if (conf->dynamic_ps_timeout > 0 && 1722 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1723 mod_timer(&local->dynamic_ps_timer, jiffies + 1724 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1725 } else { 1726 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1727 ieee80211_send_nullfunc(local, sdata, true); 1728 1729 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1730 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1731 return; 1732 1733 conf->flags |= IEEE80211_CONF_PS; 1734 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1735 } 1736 } 1737 1738 static void ieee80211_change_ps(struct ieee80211_local *local) 1739 { 1740 struct ieee80211_conf *conf = &local->hw.conf; 1741 1742 if (local->ps_sdata) { 1743 ieee80211_enable_ps(local, local->ps_sdata); 1744 } else if (conf->flags & IEEE80211_CONF_PS) { 1745 conf->flags &= ~IEEE80211_CONF_PS; 1746 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1747 del_timer_sync(&local->dynamic_ps_timer); 1748 cancel_work_sync(&local->dynamic_ps_enable_work); 1749 } 1750 } 1751 1752 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1753 { 1754 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1755 struct sta_info *sta = NULL; 1756 bool authorized = false; 1757 1758 if (!mgd->powersave) 1759 return false; 1760 1761 if (mgd->broken_ap) 1762 return false; 1763 1764 if (!mgd->associated) 1765 return false; 1766 1767 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1768 return false; 1769 1770 if (!sdata->deflink.u.mgd.have_beacon) 1771 return false; 1772 1773 rcu_read_lock(); 1774 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 1775 if (sta) 1776 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1777 rcu_read_unlock(); 1778 1779 return authorized; 1780 } 1781 1782 /* need to hold RTNL or interface lock */ 1783 void ieee80211_recalc_ps(struct ieee80211_local *local) 1784 { 1785 struct ieee80211_sub_if_data *sdata, *found = NULL; 1786 int count = 0; 1787 int timeout; 1788 1789 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1790 local->ps_sdata = NULL; 1791 return; 1792 } 1793 1794 list_for_each_entry(sdata, &local->interfaces, list) { 1795 if (!ieee80211_sdata_running(sdata)) 1796 continue; 1797 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1798 /* If an AP vif is found, then disable PS 1799 * by setting the count to zero thereby setting 1800 * ps_sdata to NULL. 1801 */ 1802 count = 0; 1803 break; 1804 } 1805 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1806 continue; 1807 found = sdata; 1808 count++; 1809 } 1810 1811 if (count == 1 && ieee80211_powersave_allowed(found)) { 1812 u8 dtimper = found->deflink.u.mgd.dtim_period; 1813 1814 timeout = local->dynamic_ps_forced_timeout; 1815 if (timeout < 0) 1816 timeout = 100; 1817 local->hw.conf.dynamic_ps_timeout = timeout; 1818 1819 /* If the TIM IE is invalid, pretend the value is 1 */ 1820 if (!dtimper) 1821 dtimper = 1; 1822 1823 local->hw.conf.ps_dtim_period = dtimper; 1824 local->ps_sdata = found; 1825 } else { 1826 local->ps_sdata = NULL; 1827 } 1828 1829 ieee80211_change_ps(local); 1830 } 1831 1832 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1833 { 1834 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1835 1836 if (sdata->vif.bss_conf.ps != ps_allowed) { 1837 sdata->vif.bss_conf.ps = ps_allowed; 1838 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_PS); 1839 } 1840 } 1841 1842 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1843 { 1844 struct ieee80211_local *local = 1845 container_of(work, struct ieee80211_local, 1846 dynamic_ps_disable_work); 1847 1848 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1849 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1850 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1851 } 1852 1853 ieee80211_wake_queues_by_reason(&local->hw, 1854 IEEE80211_MAX_QUEUE_MAP, 1855 IEEE80211_QUEUE_STOP_REASON_PS, 1856 false); 1857 } 1858 1859 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1860 { 1861 struct ieee80211_local *local = 1862 container_of(work, struct ieee80211_local, 1863 dynamic_ps_enable_work); 1864 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1865 struct ieee80211_if_managed *ifmgd; 1866 unsigned long flags; 1867 int q; 1868 1869 /* can only happen when PS was just disabled anyway */ 1870 if (!sdata) 1871 return; 1872 1873 ifmgd = &sdata->u.mgd; 1874 1875 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1876 return; 1877 1878 if (local->hw.conf.dynamic_ps_timeout > 0) { 1879 /* don't enter PS if TX frames are pending */ 1880 if (drv_tx_frames_pending(local)) { 1881 mod_timer(&local->dynamic_ps_timer, jiffies + 1882 msecs_to_jiffies( 1883 local->hw.conf.dynamic_ps_timeout)); 1884 return; 1885 } 1886 1887 /* 1888 * transmission can be stopped by others which leads to 1889 * dynamic_ps_timer expiry. Postpone the ps timer if it 1890 * is not the actual idle state. 1891 */ 1892 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1893 for (q = 0; q < local->hw.queues; q++) { 1894 if (local->queue_stop_reasons[q]) { 1895 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1896 flags); 1897 mod_timer(&local->dynamic_ps_timer, jiffies + 1898 msecs_to_jiffies( 1899 local->hw.conf.dynamic_ps_timeout)); 1900 return; 1901 } 1902 } 1903 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1904 } 1905 1906 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1907 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1908 if (drv_tx_frames_pending(local)) { 1909 mod_timer(&local->dynamic_ps_timer, jiffies + 1910 msecs_to_jiffies( 1911 local->hw.conf.dynamic_ps_timeout)); 1912 } else { 1913 ieee80211_send_nullfunc(local, sdata, true); 1914 /* Flush to get the tx status of nullfunc frame */ 1915 ieee80211_flush_queues(local, sdata, false); 1916 } 1917 } 1918 1919 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1920 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1921 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1922 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1923 local->hw.conf.flags |= IEEE80211_CONF_PS; 1924 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1925 } 1926 } 1927 1928 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1929 { 1930 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1931 1932 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1933 } 1934 1935 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1936 { 1937 struct delayed_work *delayed_work = to_delayed_work(work); 1938 struct ieee80211_sub_if_data *sdata = 1939 container_of(delayed_work, struct ieee80211_sub_if_data, 1940 deflink.dfs_cac_timer_work); 1941 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1942 1943 mutex_lock(&sdata->local->mtx); 1944 if (sdata->wdev.cac_started) { 1945 ieee80211_link_release_channel(&sdata->deflink); 1946 cfg80211_cac_event(sdata->dev, &chandef, 1947 NL80211_RADAR_CAC_FINISHED, 1948 GFP_KERNEL); 1949 } 1950 mutex_unlock(&sdata->local->mtx); 1951 } 1952 1953 static bool 1954 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1955 { 1956 struct ieee80211_local *local = sdata->local; 1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1958 bool ret = false; 1959 int ac; 1960 1961 if (local->hw.queues < IEEE80211_NUM_ACS) 1962 return false; 1963 1964 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1965 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1966 int non_acm_ac; 1967 unsigned long now = jiffies; 1968 1969 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1970 tx_tspec->admitted_time && 1971 time_after(now, tx_tspec->time_slice_start + HZ)) { 1972 tx_tspec->consumed_tx_time = 0; 1973 tx_tspec->time_slice_start = now; 1974 1975 if (tx_tspec->downgraded) 1976 tx_tspec->action = 1977 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1978 } 1979 1980 switch (tx_tspec->action) { 1981 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1982 /* take the original parameters */ 1983 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1984 sdata_err(sdata, 1985 "failed to set TX queue parameters for queue %d\n", 1986 ac); 1987 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1988 tx_tspec->downgraded = false; 1989 ret = true; 1990 break; 1991 case TX_TSPEC_ACTION_DOWNGRADE: 1992 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1993 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1994 ret = true; 1995 break; 1996 } 1997 /* downgrade next lower non-ACM AC */ 1998 for (non_acm_ac = ac + 1; 1999 non_acm_ac < IEEE80211_NUM_ACS; 2000 non_acm_ac++) 2001 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2002 break; 2003 /* Usually the loop will result in using BK even if it 2004 * requires admission control, but such a configuration 2005 * makes no sense and we have to transmit somehow - the 2006 * AC selection does the same thing. 2007 * If we started out trying to downgrade from BK, then 2008 * the extra condition here might be needed. 2009 */ 2010 if (non_acm_ac >= IEEE80211_NUM_ACS) 2011 non_acm_ac = IEEE80211_AC_BK; 2012 if (drv_conf_tx(local, sdata, ac, 2013 &sdata->tx_conf[non_acm_ac])) 2014 sdata_err(sdata, 2015 "failed to set TX queue parameters for queue %d\n", 2016 ac); 2017 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2018 ret = true; 2019 schedule_delayed_work(&ifmgd->tx_tspec_wk, 2020 tx_tspec->time_slice_start + HZ - now + 1); 2021 break; 2022 case TX_TSPEC_ACTION_NONE: 2023 /* nothing now */ 2024 break; 2025 } 2026 } 2027 2028 return ret; 2029 } 2030 2031 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2032 { 2033 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2034 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_QOS); 2035 } 2036 2037 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 2038 { 2039 struct ieee80211_sub_if_data *sdata; 2040 2041 sdata = container_of(work, struct ieee80211_sub_if_data, 2042 u.mgd.tx_tspec_wk.work); 2043 ieee80211_sta_handle_tspec_ac_params(sdata); 2044 } 2045 2046 /* MLME */ 2047 static bool 2048 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2049 struct ieee80211_sub_if_data *sdata, 2050 const u8 *wmm_param, size_t wmm_param_len, 2051 const struct ieee80211_mu_edca_param_set *mu_edca) 2052 { 2053 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2055 size_t left; 2056 int count, mu_edca_count, ac; 2057 const u8 *pos; 2058 u8 uapsd_queues = 0; 2059 2060 if (!local->ops->conf_tx) 2061 return false; 2062 2063 if (local->hw.queues < IEEE80211_NUM_ACS) 2064 return false; 2065 2066 if (!wmm_param) 2067 return false; 2068 2069 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2070 return false; 2071 2072 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2073 uapsd_queues = ifmgd->uapsd_queues; 2074 2075 count = wmm_param[6] & 0x0f; 2076 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2077 * if mu_edca was preset before and now it disappeared tell 2078 * the driver about it. 2079 */ 2080 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2081 if (count == sdata->deflink.u.mgd.wmm_last_param_set && 2082 mu_edca_count == sdata->deflink.u.mgd.mu_edca_last_param_set) 2083 return false; 2084 sdata->deflink.u.mgd.wmm_last_param_set = count; 2085 sdata->deflink.u.mgd.mu_edca_last_param_set = mu_edca_count; 2086 2087 pos = wmm_param + 8; 2088 left = wmm_param_len - 8; 2089 2090 memset(¶ms, 0, sizeof(params)); 2091 2092 sdata->wmm_acm = 0; 2093 for (; left >= 4; left -= 4, pos += 4) { 2094 int aci = (pos[0] >> 5) & 0x03; 2095 int acm = (pos[0] >> 4) & 0x01; 2096 bool uapsd = false; 2097 2098 switch (aci) { 2099 case 1: /* AC_BK */ 2100 ac = IEEE80211_AC_BK; 2101 if (acm) 2102 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2103 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2104 uapsd = true; 2105 params[ac].mu_edca = !!mu_edca; 2106 if (mu_edca) 2107 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2108 break; 2109 case 2: /* AC_VI */ 2110 ac = IEEE80211_AC_VI; 2111 if (acm) 2112 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2113 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2114 uapsd = true; 2115 params[ac].mu_edca = !!mu_edca; 2116 if (mu_edca) 2117 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2118 break; 2119 case 3: /* AC_VO */ 2120 ac = IEEE80211_AC_VO; 2121 if (acm) 2122 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2123 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2124 uapsd = true; 2125 params[ac].mu_edca = !!mu_edca; 2126 if (mu_edca) 2127 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2128 break; 2129 case 0: /* AC_BE */ 2130 default: 2131 ac = IEEE80211_AC_BE; 2132 if (acm) 2133 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2134 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2135 uapsd = true; 2136 params[ac].mu_edca = !!mu_edca; 2137 if (mu_edca) 2138 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2139 break; 2140 } 2141 2142 params[ac].aifs = pos[0] & 0x0f; 2143 2144 if (params[ac].aifs < 2) { 2145 sdata_info(sdata, 2146 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2147 params[ac].aifs, aci); 2148 params[ac].aifs = 2; 2149 } 2150 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2151 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2152 params[ac].txop = get_unaligned_le16(pos + 2); 2153 params[ac].acm = acm; 2154 params[ac].uapsd = uapsd; 2155 2156 if (params[ac].cw_min == 0 || 2157 params[ac].cw_min > params[ac].cw_max) { 2158 sdata_info(sdata, 2159 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2160 params[ac].cw_min, params[ac].cw_max, aci); 2161 return false; 2162 } 2163 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2164 } 2165 2166 /* WMM specification requires all 4 ACIs. */ 2167 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2168 if (params[ac].cw_min == 0) { 2169 sdata_info(sdata, 2170 "AP has invalid WMM params (missing AC %d), using defaults\n", 2171 ac); 2172 return false; 2173 } 2174 } 2175 2176 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2177 mlme_dbg(sdata, 2178 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2179 ac, params[ac].acm, 2180 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2181 params[ac].txop, params[ac].uapsd, 2182 ifmgd->tx_tspec[ac].downgraded); 2183 sdata->tx_conf[ac] = params[ac]; 2184 if (!ifmgd->tx_tspec[ac].downgraded && 2185 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2186 sdata_err(sdata, 2187 "failed to set TX queue parameters for AC %d\n", 2188 ac); 2189 } 2190 2191 /* enable WMM or activate new settings */ 2192 sdata->vif.bss_conf.qos = true; 2193 return true; 2194 } 2195 2196 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2197 { 2198 lockdep_assert_held(&sdata->local->mtx); 2199 2200 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2201 ieee80211_run_deferred_scan(sdata->local); 2202 } 2203 2204 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2205 { 2206 mutex_lock(&sdata->local->mtx); 2207 __ieee80211_stop_poll(sdata); 2208 mutex_unlock(&sdata->local->mtx); 2209 } 2210 2211 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2212 u16 capab, bool erp_valid, u8 erp) 2213 { 2214 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2215 struct ieee80211_supported_band *sband; 2216 u32 changed = 0; 2217 bool use_protection; 2218 bool use_short_preamble; 2219 bool use_short_slot; 2220 2221 sband = ieee80211_get_sband(sdata); 2222 if (!sband) 2223 return changed; 2224 2225 if (erp_valid) { 2226 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2227 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2228 } else { 2229 use_protection = false; 2230 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2231 } 2232 2233 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2234 if (sband->band == NL80211_BAND_5GHZ || 2235 sband->band == NL80211_BAND_6GHZ) 2236 use_short_slot = true; 2237 2238 if (use_protection != bss_conf->use_cts_prot) { 2239 bss_conf->use_cts_prot = use_protection; 2240 changed |= BSS_CHANGED_ERP_CTS_PROT; 2241 } 2242 2243 if (use_short_preamble != bss_conf->use_short_preamble) { 2244 bss_conf->use_short_preamble = use_short_preamble; 2245 changed |= BSS_CHANGED_ERP_PREAMBLE; 2246 } 2247 2248 if (use_short_slot != bss_conf->use_short_slot) { 2249 bss_conf->use_short_slot = use_short_slot; 2250 changed |= BSS_CHANGED_ERP_SLOT; 2251 } 2252 2253 return changed; 2254 } 2255 2256 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2257 struct cfg80211_bss *cbss, 2258 u32 bss_info_changed) 2259 { 2260 struct ieee80211_bss *bss = (void *)cbss->priv; 2261 struct ieee80211_local *local = sdata->local; 2262 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2263 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2264 2265 bss_info_changed |= BSS_CHANGED_ASSOC; 2266 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2267 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2268 2269 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2270 beacon_loss_count * bss_conf->beacon_int)); 2271 2272 sdata->u.mgd.associated = true; 2273 sdata->deflink.u.mgd.bss = cbss; 2274 memcpy(sdata->deflink.u.mgd.bssid, cbss->bssid, ETH_ALEN); 2275 2276 ieee80211_check_rate_mask(sdata); 2277 2278 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2279 2280 if (sdata->vif.p2p || 2281 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2282 const struct cfg80211_bss_ies *ies; 2283 2284 rcu_read_lock(); 2285 ies = rcu_dereference(cbss->ies); 2286 if (ies) { 2287 int ret; 2288 2289 ret = cfg80211_get_p2p_attr( 2290 ies->data, ies->len, 2291 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2292 (u8 *) &bss_conf->p2p_noa_attr, 2293 sizeof(bss_conf->p2p_noa_attr)); 2294 if (ret >= 2) { 2295 sdata->deflink.u.mgd.p2p_noa_index = 2296 bss_conf->p2p_noa_attr.index; 2297 bss_info_changed |= BSS_CHANGED_P2P_PS; 2298 } 2299 } 2300 rcu_read_unlock(); 2301 } 2302 2303 /* just to be sure */ 2304 ieee80211_stop_poll(sdata); 2305 2306 ieee80211_led_assoc(local, 1); 2307 2308 if (sdata->deflink.u.mgd.have_beacon) { 2309 /* 2310 * If the AP is buggy we may get here with no DTIM period 2311 * known, so assume it's 1 which is the only safe assumption 2312 * in that case, although if the TIM IE is broken powersave 2313 * probably just won't work at all. 2314 */ 2315 bss_conf->dtim_period = sdata->deflink.u.mgd.dtim_period ?: 1; 2316 bss_conf->beacon_rate = bss->beacon_rate; 2317 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2318 } else { 2319 bss_conf->beacon_rate = NULL; 2320 bss_conf->dtim_period = 0; 2321 } 2322 2323 vif_cfg->assoc = 1; 2324 2325 /* Tell the driver to monitor connection quality (if supported) */ 2326 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2327 bss_conf->cqm_rssi_thold) 2328 bss_info_changed |= BSS_CHANGED_CQM; 2329 2330 /* Enable ARP filtering */ 2331 if (vif_cfg->arp_addr_cnt) 2332 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2333 2334 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2335 2336 mutex_lock(&local->iflist_mtx); 2337 ieee80211_recalc_ps(local); 2338 mutex_unlock(&local->iflist_mtx); 2339 2340 ieee80211_recalc_smps(sdata, 0); 2341 ieee80211_recalc_ps_vif(sdata); 2342 2343 netif_carrier_on(sdata->dev); 2344 } 2345 2346 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2347 u16 stype, u16 reason, bool tx, 2348 u8 *frame_buf) 2349 { 2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2351 struct ieee80211_local *local = sdata->local; 2352 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2353 u32 changed = 0; 2354 struct ieee80211_prep_tx_info info = { 2355 .subtype = stype, 2356 }; 2357 2358 sdata_assert_lock(sdata); 2359 2360 if (WARN_ON_ONCE(tx && !frame_buf)) 2361 return; 2362 2363 if (WARN_ON(!ifmgd->associated)) 2364 return; 2365 2366 ieee80211_stop_poll(sdata); 2367 2368 ifmgd->associated = false; 2369 sdata->deflink.u.mgd.bss = NULL; 2370 netif_carrier_off(sdata->dev); 2371 2372 /* 2373 * if we want to get out of ps before disassoc (why?) we have 2374 * to do it before sending disassoc, as otherwise the null-packet 2375 * won't be valid. 2376 */ 2377 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2378 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2379 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2380 } 2381 local->ps_sdata = NULL; 2382 2383 /* disable per-vif ps */ 2384 ieee80211_recalc_ps_vif(sdata); 2385 2386 /* make sure ongoing transmission finishes */ 2387 synchronize_net(); 2388 2389 /* 2390 * drop any frame before deauth/disassoc, this can be data or 2391 * management frame. Since we are disconnecting, we should not 2392 * insist sending these frames which can take time and delay 2393 * the disconnection and possible the roaming. 2394 */ 2395 if (tx) 2396 ieee80211_flush_queues(local, sdata, true); 2397 2398 /* deauthenticate/disassociate now */ 2399 if (tx || frame_buf) { 2400 /* 2401 * In multi channel scenarios guarantee that the virtual 2402 * interface is granted immediate airtime to transmit the 2403 * deauthentication frame by calling mgd_prepare_tx, if the 2404 * driver requested so. 2405 */ 2406 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2407 !sdata->deflink.u.mgd.have_beacon) { 2408 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2409 } 2410 2411 ieee80211_send_deauth_disassoc(sdata, sdata->deflink.u.mgd.bssid, 2412 sdata->deflink.u.mgd.bssid, stype, reason, 2413 tx, frame_buf); 2414 } 2415 2416 /* flush out frame - make sure the deauth was actually sent */ 2417 if (tx) 2418 ieee80211_flush_queues(local, sdata, false); 2419 2420 drv_mgd_complete_tx(sdata->local, sdata, &info); 2421 2422 /* clear bssid only after building the needed mgmt frames */ 2423 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2424 2425 sdata->vif.cfg.ssid_len = 0; 2426 2427 /* remove AP and TDLS peers */ 2428 sta_info_flush(sdata); 2429 2430 /* finally reset all BSS / config parameters */ 2431 changed |= ieee80211_reset_erp_info(sdata); 2432 2433 ieee80211_led_assoc(local, 0); 2434 changed |= BSS_CHANGED_ASSOC; 2435 sdata->vif.cfg.assoc = false; 2436 2437 sdata->deflink.u.mgd.p2p_noa_index = -1; 2438 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2439 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2440 2441 /* on the next assoc, re-program HT/VHT parameters */ 2442 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2443 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2444 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2445 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2446 2447 /* reset MU-MIMO ownership and group data */ 2448 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2449 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2450 memset(sdata->vif.bss_conf.mu_group.position, 0, 2451 sizeof(sdata->vif.bss_conf.mu_group.position)); 2452 changed |= BSS_CHANGED_MU_GROUPS; 2453 sdata->vif.bss_conf.mu_mimo_owner = false; 2454 2455 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2456 2457 del_timer_sync(&local->dynamic_ps_timer); 2458 cancel_work_sync(&local->dynamic_ps_enable_work); 2459 2460 /* Disable ARP filtering */ 2461 if (sdata->vif.cfg.arp_addr_cnt) 2462 changed |= BSS_CHANGED_ARP_FILTER; 2463 2464 sdata->vif.bss_conf.qos = false; 2465 changed |= BSS_CHANGED_QOS; 2466 2467 /* The BSSID (not really interesting) and HT changed */ 2468 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2469 ieee80211_bss_info_change_notify(sdata, changed); 2470 2471 /* disassociated - set to defaults now */ 2472 ieee80211_set_wmm_default(sdata, false, false); 2473 2474 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2475 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2476 del_timer_sync(&sdata->u.mgd.timer); 2477 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2478 2479 sdata->vif.bss_conf.dtim_period = 0; 2480 sdata->vif.bss_conf.beacon_rate = NULL; 2481 2482 sdata->deflink.u.mgd.have_beacon = false; 2483 2484 ifmgd->flags = 0; 2485 mutex_lock(&local->mtx); 2486 ieee80211_link_release_channel(&sdata->deflink); 2487 2488 sdata->vif.bss_conf.csa_active = false; 2489 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2490 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 2491 if (sdata->deflink.csa_block_tx) { 2492 ieee80211_wake_vif_queues(local, sdata, 2493 IEEE80211_QUEUE_STOP_REASON_CSA); 2494 sdata->deflink.csa_block_tx = false; 2495 } 2496 mutex_unlock(&local->mtx); 2497 2498 /* existing TX TSPEC sessions no longer exist */ 2499 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2500 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2501 2502 bss_conf->pwr_reduction = 0; 2503 bss_conf->tx_pwr_env_num = 0; 2504 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2505 } 2506 2507 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2508 { 2509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2510 struct ieee80211_local *local = sdata->local; 2511 2512 mutex_lock(&local->mtx); 2513 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2514 goto out; 2515 2516 __ieee80211_stop_poll(sdata); 2517 2518 mutex_lock(&local->iflist_mtx); 2519 ieee80211_recalc_ps(local); 2520 mutex_unlock(&local->iflist_mtx); 2521 2522 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2523 goto out; 2524 2525 /* 2526 * We've received a probe response, but are not sure whether 2527 * we have or will be receiving any beacons or data, so let's 2528 * schedule the timers again, just in case. 2529 */ 2530 ieee80211_sta_reset_beacon_monitor(sdata); 2531 2532 mod_timer(&ifmgd->conn_mon_timer, 2533 round_jiffies_up(jiffies + 2534 IEEE80211_CONNECTION_IDLE_TIME)); 2535 out: 2536 mutex_unlock(&local->mtx); 2537 } 2538 2539 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2540 struct ieee80211_hdr *hdr, 2541 u16 tx_time) 2542 { 2543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2544 u16 tid; 2545 int ac; 2546 struct ieee80211_sta_tx_tspec *tx_tspec; 2547 unsigned long now = jiffies; 2548 2549 if (!ieee80211_is_data_qos(hdr->frame_control)) 2550 return; 2551 2552 tid = ieee80211_get_tid(hdr); 2553 ac = ieee80211_ac_from_tid(tid); 2554 tx_tspec = &ifmgd->tx_tspec[ac]; 2555 2556 if (likely(!tx_tspec->admitted_time)) 2557 return; 2558 2559 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2560 tx_tspec->consumed_tx_time = 0; 2561 tx_tspec->time_slice_start = now; 2562 2563 if (tx_tspec->downgraded) { 2564 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2565 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2566 } 2567 } 2568 2569 if (tx_tspec->downgraded) 2570 return; 2571 2572 tx_tspec->consumed_tx_time += tx_time; 2573 2574 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2575 tx_tspec->downgraded = true; 2576 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2577 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2578 } 2579 } 2580 2581 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2582 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2583 { 2584 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2585 2586 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2587 !sdata->u.mgd.probe_send_count) 2588 return; 2589 2590 if (ack) 2591 sdata->u.mgd.probe_send_count = 0; 2592 else 2593 sdata->u.mgd.nullfunc_failed = true; 2594 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2595 } 2596 2597 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2598 const u8 *src, const u8 *dst, 2599 const u8 *ssid, size_t ssid_len, 2600 struct ieee80211_channel *channel) 2601 { 2602 struct sk_buff *skb; 2603 2604 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2605 ssid, ssid_len, NULL, 0, 2606 IEEE80211_PROBE_FLAG_DIRECTED); 2607 if (skb) 2608 ieee80211_tx_skb(sdata, skb); 2609 } 2610 2611 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2612 { 2613 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2614 u8 *dst = sdata->deflink.u.mgd.bssid; 2615 u8 unicast_limit = max(1, max_probe_tries - 3); 2616 struct sta_info *sta; 2617 2618 /* 2619 * Try sending broadcast probe requests for the last three 2620 * probe requests after the first ones failed since some 2621 * buggy APs only support broadcast probe requests. 2622 */ 2623 if (ifmgd->probe_send_count >= unicast_limit) 2624 dst = NULL; 2625 2626 /* 2627 * When the hardware reports an accurate Tx ACK status, it's 2628 * better to send a nullfunc frame instead of a probe request, 2629 * as it will kick us off the AP quickly if we aren't associated 2630 * anymore. The timeout will be reset if the frame is ACKed by 2631 * the AP. 2632 */ 2633 ifmgd->probe_send_count++; 2634 2635 if (dst) { 2636 mutex_lock(&sdata->local->sta_mtx); 2637 sta = sta_info_get(sdata, dst); 2638 if (!WARN_ON(!sta)) 2639 ieee80211_check_fast_rx(sta); 2640 mutex_unlock(&sdata->local->sta_mtx); 2641 } 2642 2643 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2644 ifmgd->nullfunc_failed = false; 2645 ieee80211_send_nullfunc(sdata->local, sdata, false); 2646 } else { 2647 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2648 sdata->vif.cfg.ssid, 2649 sdata->vif.cfg.ssid_len, 2650 sdata->deflink.u.mgd.bss->channel); 2651 } 2652 2653 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2654 run_again(sdata, ifmgd->probe_timeout); 2655 } 2656 2657 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2658 bool beacon) 2659 { 2660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2661 bool already = false; 2662 2663 if (!ieee80211_sdata_running(sdata)) 2664 return; 2665 2666 sdata_lock(sdata); 2667 2668 if (!ifmgd->associated) 2669 goto out; 2670 2671 mutex_lock(&sdata->local->mtx); 2672 2673 if (sdata->local->tmp_channel || sdata->local->scanning) { 2674 mutex_unlock(&sdata->local->mtx); 2675 goto out; 2676 } 2677 2678 if (sdata->local->suspending) { 2679 /* reschedule after resume */ 2680 mutex_unlock(&sdata->local->mtx); 2681 ieee80211_reset_ap_probe(sdata); 2682 goto out; 2683 } 2684 2685 if (beacon) { 2686 mlme_dbg_ratelimited(sdata, 2687 "detected beacon loss from AP (missed %d beacons) - probing\n", 2688 beacon_loss_count); 2689 2690 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2691 } 2692 2693 /* 2694 * The driver/our work has already reported this event or the 2695 * connection monitoring has kicked in and we have already sent 2696 * a probe request. Or maybe the AP died and the driver keeps 2697 * reporting until we disassociate... 2698 * 2699 * In either case we have to ignore the current call to this 2700 * function (except for setting the correct probe reason bit) 2701 * because otherwise we would reset the timer every time and 2702 * never check whether we received a probe response! 2703 */ 2704 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2705 already = true; 2706 2707 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2708 2709 mutex_unlock(&sdata->local->mtx); 2710 2711 if (already) 2712 goto out; 2713 2714 mutex_lock(&sdata->local->iflist_mtx); 2715 ieee80211_recalc_ps(sdata->local); 2716 mutex_unlock(&sdata->local->iflist_mtx); 2717 2718 ifmgd->probe_send_count = 0; 2719 ieee80211_mgd_probe_ap_send(sdata); 2720 out: 2721 sdata_unlock(sdata); 2722 } 2723 2724 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2725 struct ieee80211_vif *vif) 2726 { 2727 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2729 struct cfg80211_bss *cbss; 2730 struct sk_buff *skb; 2731 const struct element *ssid; 2732 int ssid_len; 2733 2734 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2735 return NULL; 2736 2737 sdata_assert_lock(sdata); 2738 2739 if (ifmgd->associated) 2740 cbss = sdata->deflink.u.mgd.bss; 2741 else if (ifmgd->auth_data) 2742 cbss = ifmgd->auth_data->bss; 2743 else if (ifmgd->assoc_data) 2744 cbss = ifmgd->assoc_data->bss; 2745 else 2746 return NULL; 2747 2748 rcu_read_lock(); 2749 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2750 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2751 "invalid SSID element (len=%d)", 2752 ssid ? ssid->datalen : -1)) 2753 ssid_len = 0; 2754 else 2755 ssid_len = ssid->datalen; 2756 2757 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2758 (u32) -1, cbss->channel, 2759 ssid->data, ssid_len, 2760 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2761 rcu_read_unlock(); 2762 2763 return skb; 2764 } 2765 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2766 2767 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2768 const u8 *buf, size_t len, bool tx, 2769 u16 reason, bool reconnect) 2770 { 2771 struct ieee80211_event event = { 2772 .type = MLME_EVENT, 2773 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2774 .u.mlme.reason = reason, 2775 }; 2776 2777 if (tx) 2778 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2779 else 2780 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2781 2782 drv_event_callback(sdata->local, sdata, &event); 2783 } 2784 2785 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2786 { 2787 struct ieee80211_local *local = sdata->local; 2788 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2789 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2790 bool tx; 2791 2792 sdata_lock(sdata); 2793 if (!ifmgd->associated) { 2794 sdata_unlock(sdata); 2795 return; 2796 } 2797 2798 tx = !sdata->deflink.csa_block_tx; 2799 2800 if (!ifmgd->driver_disconnect) { 2801 /* 2802 * AP is probably out of range (or not reachable for another 2803 * reason) so remove the bss struct for that AP. 2804 */ 2805 cfg80211_unlink_bss(local->hw.wiphy, sdata->deflink.u.mgd.bss); 2806 } 2807 2808 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2809 ifmgd->driver_disconnect ? 2810 WLAN_REASON_DEAUTH_LEAVING : 2811 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2812 tx, frame_buf); 2813 mutex_lock(&local->mtx); 2814 sdata->vif.bss_conf.csa_active = false; 2815 sdata->deflink.u.mgd.csa_waiting_bcn = false; 2816 if (sdata->deflink.csa_block_tx) { 2817 ieee80211_wake_vif_queues(local, sdata, 2818 IEEE80211_QUEUE_STOP_REASON_CSA); 2819 sdata->deflink.csa_block_tx = false; 2820 } 2821 mutex_unlock(&local->mtx); 2822 2823 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2824 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2825 ifmgd->reconnect); 2826 ifmgd->reconnect = false; 2827 2828 sdata_unlock(sdata); 2829 } 2830 2831 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2832 { 2833 struct ieee80211_sub_if_data *sdata = 2834 container_of(work, struct ieee80211_sub_if_data, 2835 u.mgd.beacon_connection_loss_work); 2836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2837 2838 if (ifmgd->associated) 2839 sdata->deflink.u.mgd.beacon_loss_count++; 2840 2841 if (ifmgd->connection_loss) { 2842 sdata_info(sdata, "Connection to AP %pM lost\n", 2843 sdata->deflink.u.mgd.bssid); 2844 __ieee80211_disconnect(sdata); 2845 ifmgd->connection_loss = false; 2846 } else if (ifmgd->driver_disconnect) { 2847 sdata_info(sdata, 2848 "Driver requested disconnection from AP %pM\n", 2849 sdata->deflink.u.mgd.bssid); 2850 __ieee80211_disconnect(sdata); 2851 ifmgd->driver_disconnect = false; 2852 } else { 2853 ieee80211_mgd_probe_ap(sdata, true); 2854 } 2855 } 2856 2857 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2858 { 2859 struct ieee80211_sub_if_data *sdata = 2860 container_of(work, struct ieee80211_sub_if_data, 2861 u.mgd.csa_connection_drop_work); 2862 2863 __ieee80211_disconnect(sdata); 2864 } 2865 2866 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2867 { 2868 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2869 struct ieee80211_hw *hw = &sdata->local->hw; 2870 2871 trace_api_beacon_loss(sdata); 2872 2873 sdata->u.mgd.connection_loss = false; 2874 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2875 } 2876 EXPORT_SYMBOL(ieee80211_beacon_loss); 2877 2878 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2879 { 2880 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2881 struct ieee80211_hw *hw = &sdata->local->hw; 2882 2883 trace_api_connection_loss(sdata); 2884 2885 sdata->u.mgd.connection_loss = true; 2886 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2887 } 2888 EXPORT_SYMBOL(ieee80211_connection_loss); 2889 2890 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2891 { 2892 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2893 struct ieee80211_hw *hw = &sdata->local->hw; 2894 2895 trace_api_disconnect(sdata, reconnect); 2896 2897 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2898 return; 2899 2900 sdata->u.mgd.driver_disconnect = true; 2901 sdata->u.mgd.reconnect = reconnect; 2902 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2903 } 2904 EXPORT_SYMBOL(ieee80211_disconnect); 2905 2906 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2907 bool assoc) 2908 { 2909 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2910 2911 sdata_assert_lock(sdata); 2912 2913 if (!assoc) { 2914 /* 2915 * we are not authenticated yet, the only timer that could be 2916 * running is the timeout for the authentication response which 2917 * which is not relevant anymore. 2918 */ 2919 del_timer_sync(&sdata->u.mgd.timer); 2920 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2921 2922 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2923 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_BSSID); 2924 sdata->u.mgd.flags = 0; 2925 mutex_lock(&sdata->local->mtx); 2926 ieee80211_link_release_channel(&sdata->deflink); 2927 mutex_unlock(&sdata->local->mtx); 2928 } 2929 2930 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2931 kfree(auth_data); 2932 sdata->u.mgd.auth_data = NULL; 2933 } 2934 2935 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2936 bool assoc, bool abandon) 2937 { 2938 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2939 2940 sdata_assert_lock(sdata); 2941 2942 if (!assoc) { 2943 /* 2944 * we are not associated yet, the only timer that could be 2945 * running is the timeout for the association response which 2946 * which is not relevant anymore. 2947 */ 2948 del_timer_sync(&sdata->u.mgd.timer); 2949 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2950 2951 eth_zero_addr(sdata->deflink.u.mgd.bssid); 2952 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_BSSID); 2953 sdata->u.mgd.flags = 0; 2954 sdata->vif.bss_conf.mu_mimo_owner = false; 2955 2956 mutex_lock(&sdata->local->mtx); 2957 ieee80211_link_release_channel(&sdata->deflink); 2958 mutex_unlock(&sdata->local->mtx); 2959 2960 if (abandon) 2961 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2962 } 2963 2964 kfree(assoc_data); 2965 sdata->u.mgd.assoc_data = NULL; 2966 } 2967 2968 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2969 struct ieee80211_mgmt *mgmt, size_t len) 2970 { 2971 struct ieee80211_local *local = sdata->local; 2972 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2973 const struct element *challenge; 2974 u8 *pos; 2975 u32 tx_flags = 0; 2976 struct ieee80211_prep_tx_info info = { 2977 .subtype = IEEE80211_STYPE_AUTH, 2978 }; 2979 2980 pos = mgmt->u.auth.variable; 2981 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2982 len - (pos - (u8 *)mgmt)); 2983 if (!challenge) 2984 return; 2985 auth_data->expected_transaction = 4; 2986 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2987 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2988 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2989 IEEE80211_TX_INTFL_MLME_CONN_TX; 2990 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2991 (void *)challenge, 2992 challenge->datalen + sizeof(*challenge), 2993 auth_data->bss->bssid, auth_data->bss->bssid, 2994 auth_data->key, auth_data->key_len, 2995 auth_data->key_idx, tx_flags); 2996 } 2997 2998 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2999 const u8 *bssid) 3000 { 3001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3002 struct sta_info *sta; 3003 bool result = true; 3004 3005 sdata_info(sdata, "authenticated\n"); 3006 ifmgd->auth_data->done = true; 3007 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3008 ifmgd->auth_data->timeout_started = true; 3009 run_again(sdata, ifmgd->auth_data->timeout); 3010 3011 /* move station state to auth */ 3012 mutex_lock(&sdata->local->sta_mtx); 3013 sta = sta_info_get(sdata, bssid); 3014 if (!sta) { 3015 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 3016 result = false; 3017 goto out; 3018 } 3019 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3020 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 3021 result = false; 3022 goto out; 3023 } 3024 3025 out: 3026 mutex_unlock(&sdata->local->sta_mtx); 3027 return result; 3028 } 3029 3030 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3031 struct ieee80211_mgmt *mgmt, size_t len) 3032 { 3033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3034 u8 bssid[ETH_ALEN]; 3035 u16 auth_alg, auth_transaction, status_code; 3036 struct ieee80211_event event = { 3037 .type = MLME_EVENT, 3038 .u.mlme.data = AUTH_EVENT, 3039 }; 3040 struct ieee80211_prep_tx_info info = { 3041 .subtype = IEEE80211_STYPE_AUTH, 3042 }; 3043 3044 sdata_assert_lock(sdata); 3045 3046 if (len < 24 + 6) 3047 return; 3048 3049 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3050 return; 3051 3052 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3053 3054 if (!ether_addr_equal(bssid, mgmt->bssid)) 3055 return; 3056 3057 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3058 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3059 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3060 3061 if (auth_alg != ifmgd->auth_data->algorithm || 3062 (auth_alg != WLAN_AUTH_SAE && 3063 auth_transaction != ifmgd->auth_data->expected_transaction) || 3064 (auth_alg == WLAN_AUTH_SAE && 3065 (auth_transaction < ifmgd->auth_data->expected_transaction || 3066 auth_transaction > 2))) { 3067 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3068 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3069 auth_transaction, 3070 ifmgd->auth_data->expected_transaction); 3071 goto notify_driver; 3072 } 3073 3074 if (status_code != WLAN_STATUS_SUCCESS) { 3075 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3076 3077 if (auth_alg == WLAN_AUTH_SAE && 3078 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3079 (auth_transaction == 1 && 3080 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3081 status_code == WLAN_STATUS_SAE_PK)))) { 3082 /* waiting for userspace now */ 3083 ifmgd->auth_data->waiting = true; 3084 ifmgd->auth_data->timeout = 3085 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3086 ifmgd->auth_data->timeout_started = true; 3087 run_again(sdata, ifmgd->auth_data->timeout); 3088 goto notify_driver; 3089 } 3090 3091 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3092 mgmt->sa, status_code); 3093 ieee80211_destroy_auth_data(sdata, false); 3094 event.u.mlme.status = MLME_DENIED; 3095 event.u.mlme.reason = status_code; 3096 drv_event_callback(sdata->local, sdata, &event); 3097 goto notify_driver; 3098 } 3099 3100 switch (ifmgd->auth_data->algorithm) { 3101 case WLAN_AUTH_OPEN: 3102 case WLAN_AUTH_LEAP: 3103 case WLAN_AUTH_FT: 3104 case WLAN_AUTH_SAE: 3105 case WLAN_AUTH_FILS_SK: 3106 case WLAN_AUTH_FILS_SK_PFS: 3107 case WLAN_AUTH_FILS_PK: 3108 break; 3109 case WLAN_AUTH_SHARED_KEY: 3110 if (ifmgd->auth_data->expected_transaction != 4) { 3111 ieee80211_auth_challenge(sdata, mgmt, len); 3112 /* need another frame */ 3113 return; 3114 } 3115 break; 3116 default: 3117 WARN_ONCE(1, "invalid auth alg %d", 3118 ifmgd->auth_data->algorithm); 3119 goto notify_driver; 3120 } 3121 3122 event.u.mlme.status = MLME_SUCCESS; 3123 info.success = 1; 3124 drv_event_callback(sdata->local, sdata, &event); 3125 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3126 (auth_transaction == 2 && 3127 ifmgd->auth_data->expected_transaction == 2)) { 3128 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3129 return; /* ignore frame -- wait for timeout */ 3130 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3131 auth_transaction == 2) { 3132 sdata_info(sdata, "SAE peer confirmed\n"); 3133 ifmgd->auth_data->peer_confirmed = true; 3134 } 3135 3136 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3137 notify_driver: 3138 drv_mgd_complete_tx(sdata->local, sdata, &info); 3139 } 3140 3141 #define case_WLAN(type) \ 3142 case WLAN_REASON_##type: return #type 3143 3144 const char *ieee80211_get_reason_code_string(u16 reason_code) 3145 { 3146 switch (reason_code) { 3147 case_WLAN(UNSPECIFIED); 3148 case_WLAN(PREV_AUTH_NOT_VALID); 3149 case_WLAN(DEAUTH_LEAVING); 3150 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3151 case_WLAN(DISASSOC_AP_BUSY); 3152 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3153 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3154 case_WLAN(DISASSOC_STA_HAS_LEFT); 3155 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3156 case_WLAN(DISASSOC_BAD_POWER); 3157 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3158 case_WLAN(INVALID_IE); 3159 case_WLAN(MIC_FAILURE); 3160 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3161 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3162 case_WLAN(IE_DIFFERENT); 3163 case_WLAN(INVALID_GROUP_CIPHER); 3164 case_WLAN(INVALID_PAIRWISE_CIPHER); 3165 case_WLAN(INVALID_AKMP); 3166 case_WLAN(UNSUPP_RSN_VERSION); 3167 case_WLAN(INVALID_RSN_IE_CAP); 3168 case_WLAN(IEEE8021X_FAILED); 3169 case_WLAN(CIPHER_SUITE_REJECTED); 3170 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3171 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3172 case_WLAN(DISASSOC_LOW_ACK); 3173 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3174 case_WLAN(QSTA_LEAVE_QBSS); 3175 case_WLAN(QSTA_NOT_USE); 3176 case_WLAN(QSTA_REQUIRE_SETUP); 3177 case_WLAN(QSTA_TIMEOUT); 3178 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3179 case_WLAN(MESH_PEER_CANCELED); 3180 case_WLAN(MESH_MAX_PEERS); 3181 case_WLAN(MESH_CONFIG); 3182 case_WLAN(MESH_CLOSE); 3183 case_WLAN(MESH_MAX_RETRIES); 3184 case_WLAN(MESH_CONFIRM_TIMEOUT); 3185 case_WLAN(MESH_INVALID_GTK); 3186 case_WLAN(MESH_INCONSISTENT_PARAM); 3187 case_WLAN(MESH_INVALID_SECURITY); 3188 case_WLAN(MESH_PATH_ERROR); 3189 case_WLAN(MESH_PATH_NOFORWARD); 3190 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3191 case_WLAN(MAC_EXISTS_IN_MBSS); 3192 case_WLAN(MESH_CHAN_REGULATORY); 3193 case_WLAN(MESH_CHAN); 3194 default: return "<unknown>"; 3195 } 3196 } 3197 3198 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3199 struct ieee80211_mgmt *mgmt, size_t len) 3200 { 3201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3202 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3203 3204 sdata_assert_lock(sdata); 3205 3206 if (len < 24 + 2) 3207 return; 3208 3209 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3210 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3211 return; 3212 } 3213 3214 if (ifmgd->associated && 3215 ether_addr_equal(mgmt->bssid, sdata->deflink.u.mgd.bssid)) { 3216 const u8 *bssid = sdata->deflink.u.mgd.bssid; 3217 3218 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3219 bssid, reason_code, 3220 ieee80211_get_reason_code_string(reason_code)); 3221 3222 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3223 3224 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3225 reason_code, false); 3226 return; 3227 } 3228 3229 if (ifmgd->assoc_data && 3230 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3231 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3232 3233 sdata_info(sdata, 3234 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3235 bssid, reason_code, 3236 ieee80211_get_reason_code_string(reason_code)); 3237 3238 ieee80211_destroy_assoc_data(sdata, false, true); 3239 3240 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3241 return; 3242 } 3243 } 3244 3245 3246 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3247 struct ieee80211_mgmt *mgmt, size_t len) 3248 { 3249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3250 u16 reason_code; 3251 3252 sdata_assert_lock(sdata); 3253 3254 if (len < 24 + 2) 3255 return; 3256 3257 if (!ifmgd->associated || 3258 !ether_addr_equal(mgmt->bssid, sdata->deflink.u.mgd.bssid)) 3259 return; 3260 3261 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3262 3263 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3264 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3265 return; 3266 } 3267 3268 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3269 mgmt->sa, reason_code, 3270 ieee80211_get_reason_code_string(reason_code)); 3271 3272 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3273 3274 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3275 false); 3276 } 3277 3278 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3279 u8 *supp_rates, unsigned int supp_rates_len, 3280 u32 *rates, u32 *basic_rates, 3281 bool *have_higher_than_11mbit, 3282 int *min_rate, int *min_rate_index, 3283 int shift) 3284 { 3285 int i, j; 3286 3287 for (i = 0; i < supp_rates_len; i++) { 3288 int rate = supp_rates[i] & 0x7f; 3289 bool is_basic = !!(supp_rates[i] & 0x80); 3290 3291 if ((rate * 5 * (1 << shift)) > 110) 3292 *have_higher_than_11mbit = true; 3293 3294 /* 3295 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3296 * since they're not rates. 3297 * 3298 * Note: Even though the membership selector and the basic 3299 * rate flag share the same bit, they are not exactly 3300 * the same. 3301 */ 3302 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3303 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3304 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3305 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3306 continue; 3307 3308 for (j = 0; j < sband->n_bitrates; j++) { 3309 struct ieee80211_rate *br; 3310 int brate; 3311 3312 br = &sband->bitrates[j]; 3313 3314 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3315 if (brate == rate) { 3316 *rates |= BIT(j); 3317 if (is_basic) 3318 *basic_rates |= BIT(j); 3319 if ((rate * 5) < *min_rate) { 3320 *min_rate = rate * 5; 3321 *min_rate_index = j; 3322 } 3323 break; 3324 } 3325 } 3326 } 3327 } 3328 3329 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3330 const struct ieee802_11_elems *elems) 3331 { 3332 if (elems->ext_capab_len < 10) 3333 return false; 3334 3335 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3336 return false; 3337 3338 return sta->sta.deflink.he_cap.he_cap_elem.mac_cap_info[0] & 3339 IEEE80211_HE_MAC_CAP0_TWT_RES; 3340 } 3341 3342 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3343 struct sta_info *sta, 3344 struct ieee802_11_elems *elems) 3345 { 3346 bool twt = ieee80211_twt_req_supported(sta, elems); 3347 3348 if (sdata->vif.bss_conf.twt_requester != twt) { 3349 sdata->vif.bss_conf.twt_requester = twt; 3350 return BSS_CHANGED_TWT; 3351 } 3352 return 0; 3353 } 3354 3355 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3356 struct ieee80211_bss_conf *bss_conf, 3357 struct ieee80211_supported_band *sband, 3358 struct sta_info *sta) 3359 { 3360 const struct ieee80211_sta_he_cap *own_he_cap = 3361 ieee80211_get_he_iftype_cap(sband, 3362 ieee80211_vif_type_p2p(&sdata->vif)); 3363 3364 return bss_conf->he_support && 3365 (sta->sta.deflink.he_cap.he_cap_elem.mac_cap_info[2] & 3366 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3367 own_he_cap && 3368 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3369 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3370 } 3371 3372 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3373 struct cfg80211_bss *cbss, 3374 struct ieee80211_mgmt *mgmt, size_t len, 3375 struct ieee802_11_elems *elems) 3376 { 3377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3378 struct ieee80211_local *local = sdata->local; 3379 struct ieee80211_supported_band *sband; 3380 struct sta_info *sta; 3381 u16 capab_info, aid; 3382 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3383 const struct cfg80211_bss_ies *bss_ies = NULL; 3384 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3385 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3386 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3387 u32 changed = 0; 3388 u8 *pos; 3389 int err; 3390 bool ret; 3391 3392 /* AssocResp and ReassocResp have identical structure */ 3393 3394 pos = mgmt->u.assoc_resp.variable; 3395 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3396 if (is_s1g) { 3397 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3398 aid = 0; /* TODO */ 3399 } 3400 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3401 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3402 mgmt->bssid, assoc_data->bss->bssid); 3403 3404 if (!elems) 3405 return false; 3406 3407 if (elems->aid_resp) 3408 aid = le16_to_cpu(elems->aid_resp->aid); 3409 3410 /* 3411 * The 5 MSB of the AID field are reserved 3412 * (802.11-2016 9.4.1.8 AID field) 3413 */ 3414 aid &= 0x7ff; 3415 3416 ifmgd->broken_ap = false; 3417 3418 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3419 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3420 aid); 3421 aid = 0; 3422 ifmgd->broken_ap = true; 3423 } 3424 3425 if (!is_s1g && !elems->supp_rates) { 3426 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3427 ret = false; 3428 goto out; 3429 } 3430 3431 sdata->vif.cfg.aid = aid; 3432 ifmgd->tdls_chan_switch_prohibited = 3433 elems->ext_capab && elems->ext_capab_len >= 5 && 3434 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3435 3436 /* 3437 * Some APs are erroneously not including some information in their 3438 * (re)association response frames. Try to recover by using the data 3439 * from the beacon or probe response. This seems to afflict mobile 3440 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3441 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3442 */ 3443 if (!is_6ghz && 3444 ((assoc_data->wmm && !elems->wmm_param) || 3445 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3446 (!elems->ht_cap_elem || !elems->ht_operation)) || 3447 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3448 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3449 const struct cfg80211_bss_ies *ies; 3450 struct ieee802_11_elems *bss_elems; 3451 3452 rcu_read_lock(); 3453 ies = rcu_dereference(cbss->ies); 3454 if (ies) 3455 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3456 GFP_ATOMIC); 3457 rcu_read_unlock(); 3458 if (!bss_ies) { 3459 ret = false; 3460 goto out; 3461 } 3462 3463 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3464 false, mgmt->bssid, 3465 assoc_data->bss->bssid); 3466 if (!bss_elems) { 3467 ret = false; 3468 goto out; 3469 } 3470 3471 if (assoc_data->wmm && 3472 !elems->wmm_param && bss_elems->wmm_param) { 3473 elems->wmm_param = bss_elems->wmm_param; 3474 sdata_info(sdata, 3475 "AP bug: WMM param missing from AssocResp\n"); 3476 } 3477 3478 /* 3479 * Also check if we requested HT/VHT, otherwise the AP doesn't 3480 * have to include the IEs in the (re)association response. 3481 */ 3482 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3483 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3484 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3485 sdata_info(sdata, 3486 "AP bug: HT capability missing from AssocResp\n"); 3487 } 3488 if (!elems->ht_operation && bss_elems->ht_operation && 3489 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3490 elems->ht_operation = bss_elems->ht_operation; 3491 sdata_info(sdata, 3492 "AP bug: HT operation missing from AssocResp\n"); 3493 } 3494 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3495 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3496 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3497 sdata_info(sdata, 3498 "AP bug: VHT capa missing from AssocResp\n"); 3499 } 3500 if (!elems->vht_operation && bss_elems->vht_operation && 3501 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3502 elems->vht_operation = bss_elems->vht_operation; 3503 sdata_info(sdata, 3504 "AP bug: VHT operation missing from AssocResp\n"); 3505 } 3506 3507 kfree(bss_elems); 3508 } 3509 3510 /* 3511 * We previously checked these in the beacon/probe response, so 3512 * they should be present here. This is just a safety net. 3513 */ 3514 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3515 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3516 sdata_info(sdata, 3517 "HT AP is missing WMM params or HT capability/operation\n"); 3518 ret = false; 3519 goto out; 3520 } 3521 3522 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3523 (!elems->vht_cap_elem || !elems->vht_operation)) { 3524 sdata_info(sdata, 3525 "VHT AP is missing VHT capability/operation\n"); 3526 ret = false; 3527 goto out; 3528 } 3529 3530 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3531 !elems->he_6ghz_capa) { 3532 sdata_info(sdata, 3533 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3534 ret = false; 3535 goto out; 3536 } 3537 3538 mutex_lock(&sdata->local->sta_mtx); 3539 /* 3540 * station info was already allocated and inserted before 3541 * the association and should be available to us 3542 */ 3543 sta = sta_info_get(sdata, cbss->bssid); 3544 if (WARN_ON(!sta)) { 3545 mutex_unlock(&sdata->local->sta_mtx); 3546 ret = false; 3547 goto out; 3548 } 3549 3550 sband = ieee80211_get_sband(sdata); 3551 if (!sband) { 3552 mutex_unlock(&sdata->local->sta_mtx); 3553 ret = false; 3554 goto out; 3555 } 3556 3557 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3558 (!elems->he_cap || !elems->he_operation)) { 3559 mutex_unlock(&sdata->local->sta_mtx); 3560 sdata_info(sdata, 3561 "HE AP is missing HE capability/operation\n"); 3562 ret = false; 3563 goto out; 3564 } 3565 3566 /* Set up internal HT/VHT capabilities */ 3567 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3568 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3569 elems->ht_cap_elem, sta, 0); 3570 3571 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3572 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3573 elems->vht_cap_elem, 3574 sta, 0); 3575 3576 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3577 elems->he_cap) { 3578 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3579 elems->he_cap, 3580 elems->he_cap_len, 3581 elems->he_6ghz_capa, 3582 sta, 0); 3583 3584 bss_conf->he_support = sta->sta.deflink.he_cap.has_he; 3585 if (elems->rsnx && elems->rsnx_len && 3586 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3587 wiphy_ext_feature_isset(local->hw.wiphy, 3588 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3589 bss_conf->twt_protected = true; 3590 else 3591 bss_conf->twt_protected = false; 3592 3593 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3594 3595 if (elems->eht_operation && elems->eht_cap && 3596 !(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) { 3597 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 3598 elems->he_cap, 3599 elems->he_cap_len, 3600 elems->eht_cap, 3601 elems->eht_cap_len, 3602 sta, 0); 3603 3604 bss_conf->eht_support = sta->sta.deflink.eht_cap.has_eht; 3605 } else { 3606 bss_conf->eht_support = false; 3607 } 3608 } else { 3609 bss_conf->he_support = false; 3610 bss_conf->twt_requester = false; 3611 bss_conf->twt_protected = false; 3612 bss_conf->eht_support = false; 3613 } 3614 3615 bss_conf->twt_broadcast = 3616 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3617 3618 if (bss_conf->he_support) { 3619 bss_conf->he_bss_color.color = 3620 le32_get_bits(elems->he_operation->he_oper_params, 3621 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3622 bss_conf->he_bss_color.partial = 3623 le32_get_bits(elems->he_operation->he_oper_params, 3624 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3625 bss_conf->he_bss_color.enabled = 3626 !le32_get_bits(elems->he_operation->he_oper_params, 3627 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3628 3629 if (bss_conf->he_bss_color.enabled) 3630 changed |= BSS_CHANGED_HE_BSS_COLOR; 3631 3632 bss_conf->htc_trig_based_pkt_ext = 3633 le32_get_bits(elems->he_operation->he_oper_params, 3634 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3635 bss_conf->frame_time_rts_th = 3636 le32_get_bits(elems->he_operation->he_oper_params, 3637 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3638 3639 bss_conf->uora_exists = !!elems->uora_element; 3640 if (elems->uora_element) 3641 bss_conf->uora_ocw_range = elems->uora_element[0]; 3642 3643 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3644 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3645 /* TODO: OPEN: what happens if BSS color disable is set? */ 3646 } 3647 3648 if (cbss->transmitted_bss) { 3649 bss_conf->nontransmitted = true; 3650 ether_addr_copy(bss_conf->transmitter_bssid, 3651 cbss->transmitted_bss->bssid); 3652 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3653 bss_conf->bssid_index = cbss->bssid_index; 3654 } else { 3655 bss_conf->nontransmitted = false; 3656 memset(bss_conf->transmitter_bssid, 0, 3657 sizeof(bss_conf->transmitter_bssid)); 3658 bss_conf->bssid_indicator = 0; 3659 bss_conf->bssid_index = 0; 3660 } 3661 3662 /* 3663 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3664 * in their association response, so ignore that data for our own 3665 * configuration. If it changed since the last beacon, we'll get the 3666 * next beacon and update then. 3667 */ 3668 3669 /* 3670 * If an operating mode notification IE is present, override the 3671 * NSS calculation (that would be done in rate_control_rate_init()) 3672 * and use the # of streams from that element. 3673 */ 3674 if (elems->opmode_notif && 3675 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3676 u8 nss; 3677 3678 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3679 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3680 nss += 1; 3681 sta->sta.deflink.rx_nss = nss; 3682 } 3683 3684 rate_control_rate_init(sta); 3685 3686 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3687 set_sta_flag(sta, WLAN_STA_MFP); 3688 sta->sta.mfp = true; 3689 } else { 3690 sta->sta.mfp = false; 3691 } 3692 3693 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3694 local->hw.queues >= IEEE80211_NUM_ACS; 3695 3696 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3697 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3698 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3699 if (err) { 3700 sdata_info(sdata, 3701 "failed to move station %pM to desired state\n", 3702 sta->sta.addr); 3703 WARN_ON(__sta_info_destroy(sta)); 3704 mutex_unlock(&sdata->local->sta_mtx); 3705 ret = false; 3706 goto out; 3707 } 3708 3709 if (sdata->wdev.use_4addr) 3710 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3711 3712 mutex_unlock(&sdata->local->sta_mtx); 3713 3714 /* 3715 * Always handle WMM once after association regardless 3716 * of the first value the AP uses. Setting -1 here has 3717 * that effect because the AP values is an unsigned 3718 * 4-bit value. 3719 */ 3720 sdata->deflink.u.mgd.wmm_last_param_set = -1; 3721 sdata->deflink.u.mgd.mu_edca_last_param_set = -1; 3722 3723 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3724 ieee80211_set_wmm_default(sdata, false, false); 3725 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3726 elems->wmm_param_len, 3727 elems->mu_edca_param_set)) { 3728 /* still enable QoS since we might have HT/VHT */ 3729 ieee80211_set_wmm_default(sdata, false, true); 3730 /* set the disable-WMM flag in this case to disable 3731 * tracking WMM parameter changes in the beacon if 3732 * the parameters weren't actually valid. Doing so 3733 * avoids changing parameters very strangely when 3734 * the AP is going back and forth between valid and 3735 * invalid parameters. 3736 */ 3737 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3738 } 3739 changed |= BSS_CHANGED_QOS; 3740 3741 if (elems->max_idle_period_ie) { 3742 bss_conf->max_idle_period = 3743 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3744 bss_conf->protected_keep_alive = 3745 !!(elems->max_idle_period_ie->idle_options & 3746 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3747 changed |= BSS_CHANGED_KEEP_ALIVE; 3748 } else { 3749 bss_conf->max_idle_period = 0; 3750 bss_conf->protected_keep_alive = false; 3751 } 3752 3753 /* set assoc capability (AID was already set earlier), 3754 * ieee80211_set_associated() will tell the driver */ 3755 bss_conf->assoc_capability = capab_info; 3756 ieee80211_set_associated(sdata, cbss, changed); 3757 3758 /* 3759 * If we're using 4-addr mode, let the AP know that we're 3760 * doing so, so that it can create the STA VLAN on its side 3761 */ 3762 if (ifmgd->use_4addr) 3763 ieee80211_send_4addr_nullfunc(local, sdata); 3764 3765 /* 3766 * Start timer to probe the connection to the AP now. 3767 * Also start the timer that will detect beacon loss. 3768 */ 3769 ieee80211_sta_reset_beacon_monitor(sdata); 3770 ieee80211_sta_reset_conn_monitor(sdata); 3771 3772 ret = true; 3773 out: 3774 kfree(elems); 3775 kfree(bss_ies); 3776 return ret; 3777 } 3778 3779 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3780 struct ieee80211_mgmt *mgmt, 3781 size_t len) 3782 { 3783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3784 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3785 u16 capab_info, status_code, aid; 3786 struct ieee802_11_elems *elems; 3787 int ac, uapsd_queues = -1; 3788 u8 *pos; 3789 bool reassoc; 3790 struct cfg80211_bss *cbss; 3791 struct ieee80211_event event = { 3792 .type = MLME_EVENT, 3793 .u.mlme.data = ASSOC_EVENT, 3794 }; 3795 struct ieee80211_prep_tx_info info = {}; 3796 3797 sdata_assert_lock(sdata); 3798 3799 if (!assoc_data) 3800 return; 3801 3802 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3803 return; 3804 3805 cbss = assoc_data->bss; 3806 3807 /* 3808 * AssocResp and ReassocResp have identical structure, so process both 3809 * of them in this function. 3810 */ 3811 3812 if (len < 24 + 6) 3813 return; 3814 3815 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3816 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3817 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3818 pos = mgmt->u.assoc_resp.variable; 3819 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3820 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3821 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3822 aid = 0; /* TODO */ 3823 } 3824 3825 /* 3826 * Note: this may not be perfect, AP might misbehave - if 3827 * anyone needs to rely on perfect complete notification 3828 * with the exact right subtype, then we need to track what 3829 * we actually transmitted. 3830 */ 3831 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3832 IEEE80211_STYPE_ASSOC_REQ; 3833 3834 sdata_info(sdata, 3835 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3836 reassoc ? "Rea" : "A", mgmt->sa, 3837 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3838 3839 if (assoc_data->fils_kek_len && 3840 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3841 return; 3842 3843 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3844 mgmt->bssid, assoc_data->bss->bssid); 3845 if (!elems) 3846 goto notify_driver; 3847 3848 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3849 elems->timeout_int && 3850 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3851 u32 tu, ms; 3852 3853 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss, 3854 le32_to_cpu(elems->timeout_int->value)); 3855 3856 tu = le32_to_cpu(elems->timeout_int->value); 3857 ms = tu * 1024 / 1000; 3858 sdata_info(sdata, 3859 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3860 mgmt->sa, tu, ms); 3861 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3862 assoc_data->timeout_started = true; 3863 if (ms > IEEE80211_ASSOC_TIMEOUT) 3864 run_again(sdata, assoc_data->timeout); 3865 goto notify_driver; 3866 } 3867 3868 if (status_code != WLAN_STATUS_SUCCESS) { 3869 sdata_info(sdata, "%pM denied association (code=%d)\n", 3870 mgmt->sa, status_code); 3871 ieee80211_destroy_assoc_data(sdata, false, false); 3872 event.u.mlme.status = MLME_DENIED; 3873 event.u.mlme.reason = status_code; 3874 drv_event_callback(sdata->local, sdata, &event); 3875 } else { 3876 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3877 /* oops -- internal error -- send timeout for now */ 3878 ieee80211_destroy_assoc_data(sdata, false, false); 3879 cfg80211_assoc_timeout(sdata->dev, cbss); 3880 goto notify_driver; 3881 } 3882 event.u.mlme.status = MLME_SUCCESS; 3883 drv_event_callback(sdata->local, sdata, &event); 3884 sdata_info(sdata, "associated\n"); 3885 3886 /* 3887 * destroy assoc_data afterwards, as otherwise an idle 3888 * recalc after assoc_data is NULL but before associated 3889 * is set can cause the interface to go idle 3890 */ 3891 ieee80211_destroy_assoc_data(sdata, true, false); 3892 3893 /* get uapsd queues configuration */ 3894 uapsd_queues = 0; 3895 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3896 if (sdata->tx_conf[ac].uapsd) 3897 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3898 3899 info.success = 1; 3900 } 3901 3902 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3903 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3904 notify_driver: 3905 drv_mgd_complete_tx(sdata->local, sdata, &info); 3906 kfree(elems); 3907 } 3908 3909 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3910 struct ieee80211_mgmt *mgmt, size_t len, 3911 struct ieee80211_rx_status *rx_status) 3912 { 3913 struct ieee80211_local *local = sdata->local; 3914 struct ieee80211_bss *bss; 3915 struct ieee80211_channel *channel; 3916 3917 sdata_assert_lock(sdata); 3918 3919 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3920 ieee80211_rx_status_to_khz(rx_status)); 3921 if (!channel) 3922 return; 3923 3924 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3925 if (bss) { 3926 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3927 ieee80211_rx_bss_put(local, bss); 3928 } 3929 } 3930 3931 3932 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3933 struct sk_buff *skb) 3934 { 3935 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3936 struct ieee80211_if_managed *ifmgd; 3937 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3938 struct ieee80211_channel *channel; 3939 size_t baselen, len = skb->len; 3940 3941 ifmgd = &sdata->u.mgd; 3942 3943 sdata_assert_lock(sdata); 3944 3945 /* 3946 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3947 * "If a 6 GHz AP receives a Probe Request frame and responds with 3948 * a Probe Response frame [..], the Address 1 field of the Probe 3949 * Response frame shall be set to the broadcast address [..]" 3950 * So, on 6GHz band we should also accept broadcast responses. 3951 */ 3952 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3953 rx_status->freq); 3954 if (!channel) 3955 return; 3956 3957 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3958 (channel->band != NL80211_BAND_6GHZ || 3959 !is_broadcast_ether_addr(mgmt->da))) 3960 return; /* ignore ProbeResp to foreign address */ 3961 3962 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3963 if (baselen > len) 3964 return; 3965 3966 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3967 3968 if (ifmgd->associated && 3969 ether_addr_equal(mgmt->bssid, sdata->deflink.u.mgd.bssid)) 3970 ieee80211_reset_ap_probe(sdata); 3971 } 3972 3973 /* 3974 * This is the canonical list of information elements we care about, 3975 * the filter code also gives us all changes to the Microsoft OUI 3976 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3977 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3978 * changes to requested client power. 3979 * 3980 * We implement beacon filtering in software since that means we can 3981 * avoid processing the frame here and in cfg80211, and userspace 3982 * will not be able to tell whether the hardware supports it or not. 3983 * 3984 * XXX: This list needs to be dynamic -- userspace needs to be able to 3985 * add items it requires. It also needs to be able to tell us to 3986 * look out for other vendor IEs. 3987 */ 3988 static const u64 care_about_ies = 3989 (1ULL << WLAN_EID_COUNTRY) | 3990 (1ULL << WLAN_EID_ERP_INFO) | 3991 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3992 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3993 (1ULL << WLAN_EID_HT_CAPABILITY) | 3994 (1ULL << WLAN_EID_HT_OPERATION) | 3995 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3996 3997 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3998 struct ieee80211_if_managed *ifmgd, 3999 struct ieee80211_bss_conf *bss_conf, 4000 struct ieee80211_local *local, 4001 struct ieee80211_rx_status *rx_status) 4002 { 4003 /* Track average RSSI from the Beacon frames of the current AP */ 4004 4005 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 4006 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 4007 ewma_beacon_signal_init(&sdata->deflink.u.mgd.ave_beacon_signal); 4008 sdata->deflink.u.mgd.last_cqm_event_signal = 0; 4009 sdata->deflink.u.mgd.count_beacon_signal = 1; 4010 sdata->deflink.u.mgd.last_ave_beacon_signal = 0; 4011 } else { 4012 sdata->deflink.u.mgd.count_beacon_signal++; 4013 } 4014 4015 ewma_beacon_signal_add(&sdata->deflink.u.mgd.ave_beacon_signal, 4016 -rx_status->signal); 4017 4018 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 4019 sdata->deflink.u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 4020 int sig = -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 4021 int last_sig = sdata->deflink.u.mgd.last_ave_beacon_signal; 4022 struct ieee80211_event event = { 4023 .type = RSSI_EVENT, 4024 }; 4025 4026 /* 4027 * if signal crosses either of the boundaries, invoke callback 4028 * with appropriate parameters 4029 */ 4030 if (sig > ifmgd->rssi_max_thold && 4031 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 4032 sdata->deflink.u.mgd.last_ave_beacon_signal = sig; 4033 event.u.rssi.data = RSSI_EVENT_HIGH; 4034 drv_event_callback(local, sdata, &event); 4035 } else if (sig < ifmgd->rssi_min_thold && 4036 (last_sig >= ifmgd->rssi_max_thold || 4037 last_sig == 0)) { 4038 sdata->deflink.u.mgd.last_ave_beacon_signal = sig; 4039 event.u.rssi.data = RSSI_EVENT_LOW; 4040 drv_event_callback(local, sdata, &event); 4041 } 4042 } 4043 4044 if (bss_conf->cqm_rssi_thold && 4045 sdata->deflink.u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 4046 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 4047 int sig = -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 4048 int last_event = sdata->deflink.u.mgd.last_cqm_event_signal; 4049 int thold = bss_conf->cqm_rssi_thold; 4050 int hyst = bss_conf->cqm_rssi_hyst; 4051 4052 if (sig < thold && 4053 (last_event == 0 || sig < last_event - hyst)) { 4054 sdata->deflink.u.mgd.last_cqm_event_signal = sig; 4055 ieee80211_cqm_rssi_notify( 4056 &sdata->vif, 4057 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 4058 sig, GFP_KERNEL); 4059 } else if (sig > thold && 4060 (last_event == 0 || sig > last_event + hyst)) { 4061 sdata->deflink.u.mgd.last_cqm_event_signal = sig; 4062 ieee80211_cqm_rssi_notify( 4063 &sdata->vif, 4064 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 4065 sig, GFP_KERNEL); 4066 } 4067 } 4068 4069 if (bss_conf->cqm_rssi_low && 4070 sdata->deflink.u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 4071 int sig = -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 4072 int last_event = sdata->deflink.u.mgd.last_cqm_event_signal; 4073 int low = bss_conf->cqm_rssi_low; 4074 int high = bss_conf->cqm_rssi_high; 4075 4076 if (sig < low && 4077 (last_event == 0 || last_event >= low)) { 4078 sdata->deflink.u.mgd.last_cqm_event_signal = sig; 4079 ieee80211_cqm_rssi_notify( 4080 &sdata->vif, 4081 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 4082 sig, GFP_KERNEL); 4083 } else if (sig > high && 4084 (last_event == 0 || last_event <= high)) { 4085 sdata->deflink.u.mgd.last_cqm_event_signal = sig; 4086 ieee80211_cqm_rssi_notify( 4087 &sdata->vif, 4088 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 4089 sig, GFP_KERNEL); 4090 } 4091 } 4092 } 4093 4094 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 4095 struct cfg80211_bss *bss) 4096 { 4097 if (ether_addr_equal(tx_bssid, bss->bssid)) 4098 return true; 4099 if (!bss->transmitted_bss) 4100 return false; 4101 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 4102 } 4103 4104 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 4105 struct ieee80211_hdr *hdr, size_t len, 4106 struct ieee80211_rx_status *rx_status) 4107 { 4108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4109 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 4110 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4111 struct ieee80211_mgmt *mgmt = (void *) hdr; 4112 size_t baselen; 4113 struct ieee802_11_elems *elems; 4114 struct ieee80211_local *local = sdata->local; 4115 struct ieee80211_chanctx_conf *chanctx_conf; 4116 struct ieee80211_channel *chan; 4117 struct sta_info *sta; 4118 u32 changed = 0; 4119 bool erp_valid; 4120 u8 erp_value = 0; 4121 u32 ncrc = 0; 4122 u8 *bssid, *variable = mgmt->u.beacon.variable; 4123 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4124 4125 sdata_assert_lock(sdata); 4126 4127 /* Process beacon from the current BSS */ 4128 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4129 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4130 struct ieee80211_ext *ext = (void *) mgmt; 4131 4132 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4133 variable = ext->u.s1g_short_beacon.variable; 4134 else 4135 variable = ext->u.s1g_beacon.variable; 4136 } 4137 4138 baselen = (u8 *) variable - (u8 *) mgmt; 4139 if (baselen > len) 4140 return; 4141 4142 rcu_read_lock(); 4143 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 4144 if (!chanctx_conf) { 4145 rcu_read_unlock(); 4146 return; 4147 } 4148 4149 if (ieee80211_rx_status_to_khz(rx_status) != 4150 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4151 rcu_read_unlock(); 4152 return; 4153 } 4154 chan = chanctx_conf->def.chan; 4155 rcu_read_unlock(); 4156 4157 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4158 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4159 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4160 bssid, 4161 ifmgd->assoc_data->bss->bssid); 4162 if (!elems) 4163 return; 4164 4165 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4166 4167 if (elems->dtim_period) 4168 sdata->deflink.u.mgd.dtim_period = elems->dtim_period; 4169 sdata->deflink.u.mgd.have_beacon = true; 4170 ifmgd->assoc_data->need_beacon = false; 4171 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4172 sdata->vif.bss_conf.sync_tsf = 4173 le64_to_cpu(mgmt->u.beacon.timestamp); 4174 sdata->vif.bss_conf.sync_device_ts = 4175 rx_status->device_timestamp; 4176 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4177 } 4178 4179 if (elems->mbssid_config_ie) 4180 bss_conf->profile_periodicity = 4181 elems->mbssid_config_ie->profile_periodicity; 4182 else 4183 bss_conf->profile_periodicity = 0; 4184 4185 if (elems->ext_capab_len >= 11 && 4186 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4187 bss_conf->ema_ap = true; 4188 else 4189 bss_conf->ema_ap = false; 4190 4191 /* continue assoc process */ 4192 ifmgd->assoc_data->timeout = jiffies; 4193 ifmgd->assoc_data->timeout_started = true; 4194 run_again(sdata, ifmgd->assoc_data->timeout); 4195 kfree(elems); 4196 return; 4197 } 4198 4199 if (!ifmgd->associated || 4200 !ieee80211_rx_our_beacon(bssid, sdata->deflink.u.mgd.bss)) 4201 return; 4202 bssid = sdata->deflink.u.mgd.bssid; 4203 4204 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4205 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4206 local, rx_status); 4207 4208 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4209 mlme_dbg_ratelimited(sdata, 4210 "cancelling AP probe due to a received beacon\n"); 4211 ieee80211_reset_ap_probe(sdata); 4212 } 4213 4214 /* 4215 * Push the beacon loss detection into the future since 4216 * we are processing a beacon from the AP just now. 4217 */ 4218 ieee80211_sta_reset_beacon_monitor(sdata); 4219 4220 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4221 * element (which carries the beacon interval). Don't forget to add a 4222 * bit to care_about_ies[] above if mac80211 is interested in a 4223 * changing S1G element. 4224 */ 4225 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4226 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4227 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4228 false, care_about_ies, ncrc, 4229 mgmt->bssid, bssid); 4230 if (!elems) 4231 return; 4232 ncrc = elems->crc; 4233 4234 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4235 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 4236 if (local->hw.conf.dynamic_ps_timeout > 0) { 4237 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4238 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4239 ieee80211_hw_config(local, 4240 IEEE80211_CONF_CHANGE_PS); 4241 } 4242 ieee80211_send_nullfunc(local, sdata, false); 4243 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4244 local->pspolling = true; 4245 4246 /* 4247 * Here is assumed that the driver will be 4248 * able to send ps-poll frame and receive a 4249 * response even though power save mode is 4250 * enabled, but some drivers might require 4251 * to disable power save here. This needs 4252 * to be investigated. 4253 */ 4254 ieee80211_send_pspoll(local, sdata); 4255 } 4256 } 4257 4258 if (sdata->vif.p2p || 4259 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4260 struct ieee80211_p2p_noa_attr noa = {}; 4261 int ret; 4262 4263 ret = cfg80211_get_p2p_attr(variable, 4264 len - baselen, 4265 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4266 (u8 *) &noa, sizeof(noa)); 4267 if (ret >= 2) { 4268 if (sdata->deflink.u.mgd.p2p_noa_index != noa.index) { 4269 /* valid noa_attr and index changed */ 4270 sdata->deflink.u.mgd.p2p_noa_index = noa.index; 4271 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4272 changed |= BSS_CHANGED_P2P_PS; 4273 /* 4274 * make sure we update all information, the CRC 4275 * mechanism doesn't look at P2P attributes. 4276 */ 4277 sdata->deflink.u.mgd.beacon_crc_valid = false; 4278 } 4279 } else if (sdata->deflink.u.mgd.p2p_noa_index != -1) { 4280 /* noa_attr not found and we had valid noa_attr before */ 4281 sdata->deflink.u.mgd.p2p_noa_index = -1; 4282 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4283 changed |= BSS_CHANGED_P2P_PS; 4284 sdata->deflink.u.mgd.beacon_crc_valid = false; 4285 } 4286 } 4287 4288 if (sdata->deflink.u.mgd.csa_waiting_bcn) 4289 ieee80211_chswitch_post_beacon(sdata); 4290 4291 /* 4292 * Update beacon timing and dtim count on every beacon appearance. This 4293 * will allow the driver to use the most updated values. Do it before 4294 * comparing this one with last received beacon. 4295 * IMPORTANT: These parameters would possibly be out of sync by the time 4296 * the driver will use them. The synchronized view is currently 4297 * guaranteed only in certain callbacks. 4298 */ 4299 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4300 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4301 sdata->vif.bss_conf.sync_tsf = 4302 le64_to_cpu(mgmt->u.beacon.timestamp); 4303 sdata->vif.bss_conf.sync_device_ts = 4304 rx_status->device_timestamp; 4305 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4306 } 4307 4308 if ((ncrc == sdata->deflink.u.mgd.beacon_crc && sdata->deflink.u.mgd.beacon_crc_valid) || 4309 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4310 goto free; 4311 sdata->deflink.u.mgd.beacon_crc = ncrc; 4312 sdata->deflink.u.mgd.beacon_crc_valid = true; 4313 4314 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4315 4316 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4317 rx_status->device_timestamp, 4318 elems, true); 4319 4320 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4321 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4322 elems->wmm_param_len, 4323 elems->mu_edca_param_set)) 4324 changed |= BSS_CHANGED_QOS; 4325 4326 /* 4327 * If we haven't had a beacon before, tell the driver about the 4328 * DTIM period (and beacon timing if desired) now. 4329 */ 4330 if (!sdata->deflink.u.mgd.have_beacon) { 4331 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4332 bss_conf->dtim_period = elems->dtim_period ?: 1; 4333 4334 changed |= BSS_CHANGED_BEACON_INFO; 4335 sdata->deflink.u.mgd.have_beacon = true; 4336 4337 mutex_lock(&local->iflist_mtx); 4338 ieee80211_recalc_ps(local); 4339 mutex_unlock(&local->iflist_mtx); 4340 4341 ieee80211_recalc_ps_vif(sdata); 4342 } 4343 4344 if (elems->erp_info) { 4345 erp_valid = true; 4346 erp_value = elems->erp_info[0]; 4347 } else { 4348 erp_valid = false; 4349 } 4350 4351 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4352 changed |= ieee80211_handle_bss_capability(sdata, 4353 le16_to_cpu(mgmt->u.beacon.capab_info), 4354 erp_valid, erp_value); 4355 4356 mutex_lock(&local->sta_mtx); 4357 sta = sta_info_get(sdata, bssid); 4358 4359 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4360 4361 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4362 elems->vht_cap_elem, elems->ht_operation, 4363 elems->vht_operation, elems->he_operation, 4364 elems->eht_operation, 4365 elems->s1g_oper, bssid, &changed)) { 4366 mutex_unlock(&local->sta_mtx); 4367 sdata_info(sdata, 4368 "failed to follow AP %pM bandwidth change, disconnect\n", 4369 bssid); 4370 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4371 WLAN_REASON_DEAUTH_LEAVING, 4372 true, deauth_buf); 4373 ieee80211_report_disconnect(sdata, deauth_buf, 4374 sizeof(deauth_buf), true, 4375 WLAN_REASON_DEAUTH_LEAVING, 4376 false); 4377 goto free; 4378 } 4379 4380 if (sta && elems->opmode_notif) 4381 ieee80211_vht_handle_opmode(sdata, sta, 0, 4382 *elems->opmode_notif, 4383 rx_status->band); 4384 mutex_unlock(&local->sta_mtx); 4385 4386 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4387 elems->country_elem, 4388 elems->country_elem_len, 4389 elems->pwr_constr_elem, 4390 elems->cisco_dtpc_elem); 4391 4392 ieee80211_link_info_change_notify(sdata, 0, changed); 4393 free: 4394 kfree(elems); 4395 } 4396 4397 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4398 struct sk_buff *skb) 4399 { 4400 struct ieee80211_rx_status *rx_status; 4401 struct ieee80211_hdr *hdr; 4402 u16 fc; 4403 4404 rx_status = (struct ieee80211_rx_status *) skb->cb; 4405 hdr = (struct ieee80211_hdr *) skb->data; 4406 fc = le16_to_cpu(hdr->frame_control); 4407 4408 sdata_lock(sdata); 4409 switch (fc & IEEE80211_FCTL_STYPE) { 4410 case IEEE80211_STYPE_S1G_BEACON: 4411 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4412 break; 4413 } 4414 sdata_unlock(sdata); 4415 } 4416 4417 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4418 struct sk_buff *skb) 4419 { 4420 struct ieee80211_rx_status *rx_status; 4421 struct ieee80211_mgmt *mgmt; 4422 u16 fc; 4423 int ies_len; 4424 4425 rx_status = (struct ieee80211_rx_status *) skb->cb; 4426 mgmt = (struct ieee80211_mgmt *) skb->data; 4427 fc = le16_to_cpu(mgmt->frame_control); 4428 4429 sdata_lock(sdata); 4430 4431 switch (fc & IEEE80211_FCTL_STYPE) { 4432 case IEEE80211_STYPE_BEACON: 4433 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4434 skb->len, rx_status); 4435 break; 4436 case IEEE80211_STYPE_PROBE_RESP: 4437 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4438 break; 4439 case IEEE80211_STYPE_AUTH: 4440 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4441 break; 4442 case IEEE80211_STYPE_DEAUTH: 4443 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4444 break; 4445 case IEEE80211_STYPE_DISASSOC: 4446 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4447 break; 4448 case IEEE80211_STYPE_ASSOC_RESP: 4449 case IEEE80211_STYPE_REASSOC_RESP: 4450 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4451 break; 4452 case IEEE80211_STYPE_ACTION: 4453 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4454 struct ieee802_11_elems *elems; 4455 4456 ies_len = skb->len - 4457 offsetof(struct ieee80211_mgmt, 4458 u.action.u.chan_switch.variable); 4459 4460 if (ies_len < 0) 4461 break; 4462 4463 /* CSA IE cannot be overridden, no need for BSSID */ 4464 elems = ieee802_11_parse_elems( 4465 mgmt->u.action.u.chan_switch.variable, 4466 ies_len, true, mgmt->bssid, NULL); 4467 4468 if (elems && !elems->parse_error) 4469 ieee80211_sta_process_chanswitch(sdata, 4470 rx_status->mactime, 4471 rx_status->device_timestamp, 4472 elems, false); 4473 kfree(elems); 4474 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4475 struct ieee802_11_elems *elems; 4476 4477 ies_len = skb->len - 4478 offsetof(struct ieee80211_mgmt, 4479 u.action.u.ext_chan_switch.variable); 4480 4481 if (ies_len < 0) 4482 break; 4483 4484 /* 4485 * extended CSA IE can't be overridden, no need for 4486 * BSSID 4487 */ 4488 elems = ieee802_11_parse_elems( 4489 mgmt->u.action.u.ext_chan_switch.variable, 4490 ies_len, true, mgmt->bssid, NULL); 4491 4492 if (elems && !elems->parse_error) { 4493 /* for the handling code pretend it was an IE */ 4494 elems->ext_chansw_ie = 4495 &mgmt->u.action.u.ext_chan_switch.data; 4496 4497 ieee80211_sta_process_chanswitch(sdata, 4498 rx_status->mactime, 4499 rx_status->device_timestamp, 4500 elems, false); 4501 } 4502 4503 kfree(elems); 4504 } 4505 break; 4506 } 4507 sdata_unlock(sdata); 4508 } 4509 4510 static void ieee80211_sta_timer(struct timer_list *t) 4511 { 4512 struct ieee80211_sub_if_data *sdata = 4513 from_timer(sdata, t, u.mgd.timer); 4514 4515 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4516 } 4517 4518 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4519 u8 reason, bool tx) 4520 { 4521 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4522 4523 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4524 tx, frame_buf); 4525 4526 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4527 reason, false); 4528 } 4529 4530 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4531 { 4532 struct ieee80211_local *local = sdata->local; 4533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4534 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4535 u32 tx_flags = 0; 4536 u16 trans = 1; 4537 u16 status = 0; 4538 struct ieee80211_prep_tx_info info = { 4539 .subtype = IEEE80211_STYPE_AUTH, 4540 }; 4541 4542 sdata_assert_lock(sdata); 4543 4544 if (WARN_ON_ONCE(!auth_data)) 4545 return -EINVAL; 4546 4547 auth_data->tries++; 4548 4549 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4550 sdata_info(sdata, "authentication with %pM timed out\n", 4551 auth_data->bss->bssid); 4552 4553 /* 4554 * Most likely AP is not in the range so remove the 4555 * bss struct for that AP. 4556 */ 4557 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4558 4559 return -ETIMEDOUT; 4560 } 4561 4562 if (auth_data->algorithm == WLAN_AUTH_SAE) 4563 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4564 4565 drv_mgd_prepare_tx(local, sdata, &info); 4566 4567 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4568 auth_data->bss->bssid, auth_data->tries, 4569 IEEE80211_AUTH_MAX_TRIES); 4570 4571 auth_data->expected_transaction = 2; 4572 4573 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4574 trans = auth_data->sae_trans; 4575 status = auth_data->sae_status; 4576 auth_data->expected_transaction = trans; 4577 } 4578 4579 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4580 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4581 IEEE80211_TX_INTFL_MLME_CONN_TX; 4582 4583 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4584 auth_data->data, auth_data->data_len, 4585 auth_data->bss->bssid, 4586 auth_data->bss->bssid, NULL, 0, 0, 4587 tx_flags); 4588 4589 if (tx_flags == 0) { 4590 if (auth_data->algorithm == WLAN_AUTH_SAE) 4591 auth_data->timeout = jiffies + 4592 IEEE80211_AUTH_TIMEOUT_SAE; 4593 else 4594 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4595 } else { 4596 auth_data->timeout = 4597 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4598 } 4599 4600 auth_data->timeout_started = true; 4601 run_again(sdata, auth_data->timeout); 4602 4603 return 0; 4604 } 4605 4606 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4607 { 4608 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4609 struct ieee80211_local *local = sdata->local; 4610 int ret; 4611 4612 sdata_assert_lock(sdata); 4613 4614 assoc_data->tries++; 4615 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4616 sdata_info(sdata, "association with %pM timed out\n", 4617 assoc_data->bss->bssid); 4618 4619 /* 4620 * Most likely AP is not in the range so remove the 4621 * bss struct for that AP. 4622 */ 4623 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4624 4625 return -ETIMEDOUT; 4626 } 4627 4628 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4629 assoc_data->bss->bssid, assoc_data->tries, 4630 IEEE80211_ASSOC_MAX_TRIES); 4631 ret = ieee80211_send_assoc(sdata); 4632 if (ret) 4633 return ret; 4634 4635 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4636 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4637 assoc_data->timeout_started = true; 4638 run_again(sdata, assoc_data->timeout); 4639 } else { 4640 assoc_data->timeout = 4641 round_jiffies_up(jiffies + 4642 IEEE80211_ASSOC_TIMEOUT_LONG); 4643 assoc_data->timeout_started = true; 4644 run_again(sdata, assoc_data->timeout); 4645 } 4646 4647 return 0; 4648 } 4649 4650 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4651 __le16 fc, bool acked) 4652 { 4653 struct ieee80211_local *local = sdata->local; 4654 4655 sdata->u.mgd.status_fc = fc; 4656 sdata->u.mgd.status_acked = acked; 4657 sdata->u.mgd.status_received = true; 4658 4659 ieee80211_queue_work(&local->hw, &sdata->work); 4660 } 4661 4662 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4663 { 4664 struct ieee80211_local *local = sdata->local; 4665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4666 4667 sdata_lock(sdata); 4668 4669 if (ifmgd->status_received) { 4670 __le16 fc = ifmgd->status_fc; 4671 bool status_acked = ifmgd->status_acked; 4672 4673 ifmgd->status_received = false; 4674 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4675 if (status_acked) { 4676 if (ifmgd->auth_data->algorithm == 4677 WLAN_AUTH_SAE) 4678 ifmgd->auth_data->timeout = 4679 jiffies + 4680 IEEE80211_AUTH_TIMEOUT_SAE; 4681 else 4682 ifmgd->auth_data->timeout = 4683 jiffies + 4684 IEEE80211_AUTH_TIMEOUT_SHORT; 4685 run_again(sdata, ifmgd->auth_data->timeout); 4686 } else { 4687 ifmgd->auth_data->timeout = jiffies - 1; 4688 } 4689 ifmgd->auth_data->timeout_started = true; 4690 } else if (ifmgd->assoc_data && 4691 (ieee80211_is_assoc_req(fc) || 4692 ieee80211_is_reassoc_req(fc))) { 4693 if (status_acked) { 4694 ifmgd->assoc_data->timeout = 4695 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4696 run_again(sdata, ifmgd->assoc_data->timeout); 4697 } else { 4698 ifmgd->assoc_data->timeout = jiffies - 1; 4699 } 4700 ifmgd->assoc_data->timeout_started = true; 4701 } 4702 } 4703 4704 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4705 time_after(jiffies, ifmgd->auth_data->timeout)) { 4706 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 4707 /* 4708 * ok ... we waited for assoc or continuation but 4709 * userspace didn't do it, so kill the auth data 4710 */ 4711 ieee80211_destroy_auth_data(sdata, false); 4712 } else if (ieee80211_auth(sdata)) { 4713 u8 bssid[ETH_ALEN]; 4714 struct ieee80211_event event = { 4715 .type = MLME_EVENT, 4716 .u.mlme.data = AUTH_EVENT, 4717 .u.mlme.status = MLME_TIMEOUT, 4718 }; 4719 4720 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4721 4722 ieee80211_destroy_auth_data(sdata, false); 4723 4724 cfg80211_auth_timeout(sdata->dev, bssid); 4725 drv_event_callback(sdata->local, sdata, &event); 4726 } 4727 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4728 run_again(sdata, ifmgd->auth_data->timeout); 4729 4730 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4731 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4732 if ((ifmgd->assoc_data->need_beacon && 4733 !sdata->deflink.u.mgd.have_beacon) || 4734 ieee80211_do_assoc(sdata)) { 4735 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4736 struct ieee80211_event event = { 4737 .type = MLME_EVENT, 4738 .u.mlme.data = ASSOC_EVENT, 4739 .u.mlme.status = MLME_TIMEOUT, 4740 }; 4741 4742 ieee80211_destroy_assoc_data(sdata, false, false); 4743 cfg80211_assoc_timeout(sdata->dev, bss); 4744 drv_event_callback(sdata->local, sdata, &event); 4745 } 4746 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4747 run_again(sdata, ifmgd->assoc_data->timeout); 4748 4749 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4750 ifmgd->associated) { 4751 u8 *bssid = sdata->deflink.u.mgd.bssid; 4752 int max_tries; 4753 4754 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4755 max_tries = max_nullfunc_tries; 4756 else 4757 max_tries = max_probe_tries; 4758 4759 /* ACK received for nullfunc probing frame */ 4760 if (!ifmgd->probe_send_count) 4761 ieee80211_reset_ap_probe(sdata); 4762 else if (ifmgd->nullfunc_failed) { 4763 if (ifmgd->probe_send_count < max_tries) { 4764 mlme_dbg(sdata, 4765 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4766 bssid, ifmgd->probe_send_count, 4767 max_tries); 4768 ieee80211_mgd_probe_ap_send(sdata); 4769 } else { 4770 mlme_dbg(sdata, 4771 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4772 bssid); 4773 ieee80211_sta_connection_lost(sdata, 4774 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4775 false); 4776 } 4777 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4778 run_again(sdata, ifmgd->probe_timeout); 4779 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4780 mlme_dbg(sdata, 4781 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4782 bssid, probe_wait_ms); 4783 ieee80211_sta_connection_lost(sdata, 4784 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4785 } else if (ifmgd->probe_send_count < max_tries) { 4786 mlme_dbg(sdata, 4787 "No probe response from AP %pM after %dms, try %d/%i\n", 4788 bssid, probe_wait_ms, 4789 ifmgd->probe_send_count, max_tries); 4790 ieee80211_mgd_probe_ap_send(sdata); 4791 } else { 4792 /* 4793 * We actually lost the connection ... or did we? 4794 * Let's make sure! 4795 */ 4796 mlme_dbg(sdata, 4797 "No probe response from AP %pM after %dms, disconnecting.\n", 4798 bssid, probe_wait_ms); 4799 4800 ieee80211_sta_connection_lost(sdata, 4801 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4802 } 4803 } 4804 4805 sdata_unlock(sdata); 4806 } 4807 4808 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4809 { 4810 struct ieee80211_sub_if_data *sdata = 4811 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4812 4813 if (sdata->vif.bss_conf.csa_active && 4814 !sdata->deflink.u.mgd.csa_waiting_bcn) 4815 return; 4816 4817 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4818 return; 4819 4820 sdata->u.mgd.connection_loss = false; 4821 ieee80211_queue_work(&sdata->local->hw, 4822 &sdata->u.mgd.beacon_connection_loss_work); 4823 } 4824 4825 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4826 { 4827 struct ieee80211_sub_if_data *sdata = 4828 from_timer(sdata, t, u.mgd.conn_mon_timer); 4829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4830 struct ieee80211_local *local = sdata->local; 4831 struct sta_info *sta; 4832 unsigned long timeout; 4833 4834 if (sdata->vif.bss_conf.csa_active && 4835 !sdata->deflink.u.mgd.csa_waiting_bcn) 4836 return; 4837 4838 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 4839 if (!sta) 4840 return; 4841 4842 timeout = sta->deflink.status_stats.last_ack; 4843 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 4844 timeout = sta->deflink.rx_stats.last_rx; 4845 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4846 4847 /* If timeout is after now, then update timer to fire at 4848 * the later date, but do not actually probe at this time. 4849 */ 4850 if (time_is_after_jiffies(timeout)) { 4851 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4852 return; 4853 } 4854 4855 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4856 } 4857 4858 static void ieee80211_sta_monitor_work(struct work_struct *work) 4859 { 4860 struct ieee80211_sub_if_data *sdata = 4861 container_of(work, struct ieee80211_sub_if_data, 4862 u.mgd.monitor_work); 4863 4864 ieee80211_mgd_probe_ap(sdata, false); 4865 } 4866 4867 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4868 { 4869 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4870 __ieee80211_stop_poll(sdata); 4871 4872 /* let's probe the connection once */ 4873 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4874 ieee80211_queue_work(&sdata->local->hw, 4875 &sdata->u.mgd.monitor_work); 4876 } 4877 } 4878 4879 #ifdef CONFIG_PM 4880 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4881 { 4882 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4883 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4884 4885 sdata_lock(sdata); 4886 4887 if (ifmgd->auth_data || ifmgd->assoc_data) { 4888 const u8 *bssid = ifmgd->auth_data ? 4889 ifmgd->auth_data->bss->bssid : 4890 ifmgd->assoc_data->bss->bssid; 4891 4892 /* 4893 * If we are trying to authenticate / associate while suspending, 4894 * cfg80211 won't know and won't actually abort those attempts, 4895 * thus we need to do that ourselves. 4896 */ 4897 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4898 IEEE80211_STYPE_DEAUTH, 4899 WLAN_REASON_DEAUTH_LEAVING, 4900 false, frame_buf); 4901 if (ifmgd->assoc_data) 4902 ieee80211_destroy_assoc_data(sdata, false, true); 4903 if (ifmgd->auth_data) 4904 ieee80211_destroy_auth_data(sdata, false); 4905 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4906 IEEE80211_DEAUTH_FRAME_LEN, 4907 false); 4908 } 4909 4910 /* This is a bit of a hack - we should find a better and more generic 4911 * solution to this. Normally when suspending, cfg80211 will in fact 4912 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4913 * auth (not so important) or assoc (this is the problem) process. 4914 * 4915 * As a consequence, it can happen that we are in the process of both 4916 * associating and suspending, and receive an association response 4917 * after cfg80211 has checked if it needs to disconnect, but before 4918 * we actually set the flag to drop incoming frames. This will then 4919 * cause the workqueue flush to process the association response in 4920 * the suspend, resulting in a successful association just before it 4921 * tries to remove the interface from the driver, which now though 4922 * has a channel context assigned ... this results in issues. 4923 * 4924 * To work around this (for now) simply deauth here again if we're 4925 * now connected. 4926 */ 4927 if (ifmgd->associated && !sdata->local->wowlan) { 4928 u8 bssid[ETH_ALEN]; 4929 struct cfg80211_deauth_request req = { 4930 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4931 .bssid = bssid, 4932 }; 4933 4934 memcpy(bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN); 4935 ieee80211_mgd_deauth(sdata, &req); 4936 } 4937 4938 sdata_unlock(sdata); 4939 } 4940 #endif 4941 4942 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4943 { 4944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4945 4946 sdata_lock(sdata); 4947 if (!ifmgd->associated) { 4948 sdata_unlock(sdata); 4949 return; 4950 } 4951 4952 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4953 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4954 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4955 ieee80211_sta_connection_lost(sdata, 4956 WLAN_REASON_UNSPECIFIED, 4957 true); 4958 sdata_unlock(sdata); 4959 return; 4960 } 4961 4962 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 4963 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 4964 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 4965 ieee80211_sta_connection_lost(sdata, 4966 WLAN_REASON_UNSPECIFIED, 4967 true); 4968 sdata_unlock(sdata); 4969 return; 4970 } 4971 4972 sdata_unlock(sdata); 4973 } 4974 4975 /* interface setup */ 4976 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4977 { 4978 struct ieee80211_if_managed *ifmgd; 4979 4980 ifmgd = &sdata->u.mgd; 4981 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4982 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4983 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4984 ieee80211_beacon_connection_loss_work); 4985 INIT_WORK(&ifmgd->csa_connection_drop_work, 4986 ieee80211_csa_connection_drop_work); 4987 INIT_WORK(&sdata->deflink.u.mgd.request_smps_work, 4988 ieee80211_request_smps_mgd_work); 4989 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4990 ieee80211_tdls_peer_del_work); 4991 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4992 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4993 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4994 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4995 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4996 ieee80211_sta_handle_tspec_ac_params_wk); 4997 4998 ifmgd->flags = 0; 4999 ifmgd->powersave = sdata->wdev.ps; 5000 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 5001 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 5002 sdata->deflink.u.mgd.p2p_noa_index = -1; 5003 5004 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 5005 sdata->deflink.u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 5006 else 5007 sdata->deflink.u.mgd.req_smps = IEEE80211_SMPS_OFF; 5008 5009 /* Setup TDLS data */ 5010 spin_lock_init(&ifmgd->teardown_lock); 5011 ifmgd->teardown_skb = NULL; 5012 ifmgd->orig_teardown_skb = NULL; 5013 } 5014 5015 /* scan finished notification */ 5016 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 5017 { 5018 struct ieee80211_sub_if_data *sdata; 5019 5020 /* Restart STA timers */ 5021 rcu_read_lock(); 5022 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 5023 if (ieee80211_sdata_running(sdata)) 5024 ieee80211_restart_sta_timer(sdata); 5025 } 5026 rcu_read_unlock(); 5027 } 5028 5029 static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata, 5030 struct cfg80211_bss *cbss) 5031 { 5032 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5034 const struct element *ht_cap_elem, *vht_cap_elem; 5035 const struct cfg80211_bss_ies *ies; 5036 const struct ieee80211_ht_cap *ht_cap; 5037 const struct ieee80211_vht_cap *vht_cap; 5038 const struct ieee80211_he_cap_elem *he_cap; 5039 const struct element *he_cap_elem; 5040 u16 mcs_80_map, mcs_160_map; 5041 int i, mcs_nss_size; 5042 bool support_160; 5043 u8 chains = 1; 5044 5045 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 5046 return chains; 5047 5048 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5049 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5050 ht_cap = (void *)ht_cap_elem->data; 5051 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5052 /* 5053 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5054 * "Tx Unequal Modulation Supported" fields. 5055 */ 5056 } 5057 5058 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 5059 return chains; 5060 5061 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5062 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5063 u8 nss; 5064 u16 tx_mcs_map; 5065 5066 vht_cap = (void *)vht_cap_elem->data; 5067 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5068 for (nss = 8; nss > 0; nss--) { 5069 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5070 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5071 break; 5072 } 5073 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5074 chains = max(chains, nss); 5075 } 5076 5077 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE) 5078 return chains; 5079 5080 ies = rcu_dereference(cbss->ies); 5081 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5082 ies->data, ies->len); 5083 5084 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5085 return chains; 5086 5087 /* skip one byte ext_tag_id */ 5088 he_cap = (void *)(he_cap_elem->data + 1); 5089 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5090 5091 /* invalid HE IE */ 5092 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5093 return chains; 5094 5095 /* mcs_nss is right after he_cap info */ 5096 he_mcs_nss_supp = (void *)(he_cap + 1); 5097 5098 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5099 5100 for (i = 7; i >= 0; i--) { 5101 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5102 5103 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5104 chains = max_t(u8, chains, i + 1); 5105 break; 5106 } 5107 } 5108 5109 support_160 = he_cap->phy_cap_info[0] & 5110 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5111 5112 if (!support_160) 5113 return chains; 5114 5115 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5116 for (i = 7; i >= 0; i--) { 5117 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5118 5119 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5120 chains = max_t(u8, chains, i + 1); 5121 break; 5122 } 5123 } 5124 5125 return chains; 5126 } 5127 5128 static bool 5129 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5130 const struct cfg80211_bss_ies *ies, 5131 const struct ieee80211_he_operation *he_op) 5132 { 5133 const struct element *he_cap_elem; 5134 const struct ieee80211_he_cap_elem *he_cap; 5135 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5136 u16 mcs_80_map_tx, mcs_80_map_rx; 5137 u16 ap_min_req_set; 5138 int mcs_nss_size; 5139 int nss; 5140 5141 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5142 ies->data, ies->len); 5143 5144 /* invalid HE IE */ 5145 if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) { 5146 sdata_info(sdata, 5147 "Invalid HE elem, Disable HE\n"); 5148 return false; 5149 } 5150 5151 /* skip one byte ext_tag_id */ 5152 he_cap = (void *)(he_cap_elem->data + 1); 5153 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5154 5155 /* invalid HE IE */ 5156 if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) { 5157 sdata_info(sdata, 5158 "Invalid HE elem with nss size, Disable HE\n"); 5159 return false; 5160 } 5161 5162 /* mcs_nss is right after he_cap info */ 5163 he_mcs_nss_supp = (void *)(he_cap + 1); 5164 5165 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5166 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 5167 5168 /* P802.11-REVme/D0.3 5169 * 27.1.1 Introduction to the HE PHY 5170 * ... 5171 * An HE STA shall support the following features: 5172 * ... 5173 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 5174 * supported channel widths for HE SU PPDUs 5175 */ 5176 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 5177 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 5178 sdata_info(sdata, 5179 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 5180 mcs_80_map_tx, mcs_80_map_rx); 5181 return false; 5182 } 5183 5184 if (!he_op) 5185 return true; 5186 5187 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5188 5189 /* make sure the AP is consistent with itself 5190 * 5191 * P802.11-REVme/D0.3 5192 * 26.17.1 Basic HE BSS operation 5193 * 5194 * A STA that is operating in an HE BSS shall be able to receive and 5195 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 5196 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 5197 * MLME-START.request primitive and shall be able to receive at each of 5198 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 5199 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 5200 * primitive 5201 */ 5202 for (nss = 8; nss > 0; nss--) { 5203 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5204 u8 ap_rx_val; 5205 u8 ap_tx_val; 5206 5207 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5208 continue; 5209 5210 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 5211 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 5212 5213 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5214 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5215 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 5216 sdata_info(sdata, 5217 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 5218 nss, ap_rx_val, ap_rx_val, ap_op_val); 5219 return false; 5220 } 5221 } 5222 5223 return true; 5224 } 5225 5226 static bool 5227 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 5228 struct ieee80211_supported_band *sband, 5229 const struct ieee80211_he_operation *he_op) 5230 { 5231 const struct ieee80211_sta_he_cap *sta_he_cap = 5232 ieee80211_get_he_iftype_cap(sband, 5233 ieee80211_vif_type_p2p(&sdata->vif)); 5234 u16 ap_min_req_set; 5235 int i; 5236 5237 if (!sta_he_cap || !he_op) 5238 return false; 5239 5240 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 5241 5242 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 5243 for (i = 0; i < 3; i++) { 5244 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 5245 &sta_he_cap->he_mcs_nss_supp; 5246 u16 sta_mcs_map_rx = 5247 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 5248 u16 sta_mcs_map_tx = 5249 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 5250 u8 nss; 5251 bool verified = true; 5252 5253 /* 5254 * For each band there is a maximum of 8 spatial streams 5255 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 5256 * of 2 bits per NSS (1-8), with the values defined in enum 5257 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 5258 * capabilities aren't less than the AP's minimum requirements 5259 * for this HE BSS per SS. 5260 * It is enough to find one such band that meets the reqs. 5261 */ 5262 for (nss = 8; nss > 0; nss--) { 5263 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 5264 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 5265 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5266 5267 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5268 continue; 5269 5270 /* 5271 * Make sure the HE AP doesn't require MCSs that aren't 5272 * supported by the client as required by spec 5273 * 5274 * P802.11-REVme/D0.3 5275 * 26.17.1 Basic HE BSS operation 5276 * 5277 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 5278 * a BSS, unless it supports (i.e., is able to both transmit and 5279 * receive using) all of the <HE-MCS, NSS> tuples in the basic 5280 * HE-MCS and NSS set. 5281 */ 5282 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5283 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5284 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 5285 verified = false; 5286 break; 5287 } 5288 } 5289 5290 if (verified) 5291 return true; 5292 } 5293 5294 /* If here, STA doesn't meet AP's HE min requirements */ 5295 return false; 5296 } 5297 5298 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5299 struct cfg80211_bss *cbss) 5300 { 5301 struct ieee80211_local *local = sdata->local; 5302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5303 const struct ieee80211_ht_cap *ht_cap = NULL; 5304 const struct ieee80211_ht_operation *ht_oper = NULL; 5305 const struct ieee80211_vht_operation *vht_oper = NULL; 5306 const struct ieee80211_he_operation *he_oper = NULL; 5307 const struct ieee80211_eht_operation *eht_oper = NULL; 5308 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5309 struct ieee80211_supported_band *sband; 5310 struct cfg80211_chan_def chandef; 5311 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5312 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5313 struct ieee80211_bss *bss = (void *)cbss->priv; 5314 struct ieee802_11_elems *elems; 5315 const struct cfg80211_bss_ies *ies; 5316 int ret; 5317 u32 i; 5318 bool have_80mhz; 5319 5320 rcu_read_lock(); 5321 5322 ies = rcu_dereference(cbss->ies); 5323 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5324 NULL, NULL); 5325 if (!elems) { 5326 rcu_read_unlock(); 5327 return -ENOMEM; 5328 } 5329 5330 sband = local->hw.wiphy->bands[cbss->channel->band]; 5331 5332 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5333 IEEE80211_STA_DISABLE_80P80MHZ | 5334 IEEE80211_STA_DISABLE_160MHZ); 5335 5336 /* disable HT/VHT/HE if we don't support them */ 5337 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5338 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n"); 5339 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5340 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5341 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5342 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5343 } 5344 5345 if (!sband->vht_cap.vht_supported && is_5ghz) { 5346 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n"); 5347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5348 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5349 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5350 } 5351 5352 if (!ieee80211_get_he_iftype_cap(sband, 5353 ieee80211_vif_type_p2p(&sdata->vif))) { 5354 mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n"); 5355 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5356 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5357 } 5358 5359 if (!ieee80211_get_eht_iftype_cap(sband, 5360 ieee80211_vif_type_p2p(&sdata->vif))) { 5361 mlme_dbg(sdata, "EHT not supported, disabling EHT\n"); 5362 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5363 } 5364 5365 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5366 ht_oper = elems->ht_operation; 5367 ht_cap = elems->ht_cap_elem; 5368 5369 if (!ht_cap) { 5370 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5371 ht_oper = NULL; 5372 } 5373 } 5374 5375 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5376 vht_oper = elems->vht_operation; 5377 if (vht_oper && !ht_oper) { 5378 vht_oper = NULL; 5379 sdata_info(sdata, 5380 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5381 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5382 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5383 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5384 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5385 } 5386 5387 if (!elems->vht_cap_elem) { 5388 sdata_info(sdata, 5389 "bad VHT capabilities, disabling VHT\n"); 5390 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5391 vht_oper = NULL; 5392 } 5393 } 5394 5395 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5396 he_oper = elems->he_operation; 5397 5398 if (is_6ghz) { 5399 struct ieee80211_bss_conf *bss_conf; 5400 u8 i, j = 0; 5401 5402 bss_conf = &sdata->vif.bss_conf; 5403 5404 if (elems->pwr_constr_elem) 5405 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5406 5407 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5408 ARRAY_SIZE(elems->tx_pwr_env)); 5409 5410 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5411 if (elems->tx_pwr_env_len[i] > 5412 sizeof(bss_conf->tx_pwr_env[j])) 5413 continue; 5414 5415 bss_conf->tx_pwr_env_num++; 5416 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5417 elems->tx_pwr_env_len[i]); 5418 j++; 5419 } 5420 } 5421 5422 if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) || 5423 !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5424 ifmgd->flags |= IEEE80211_STA_DISABLE_HE | 5425 IEEE80211_STA_DISABLE_EHT; 5426 } 5427 5428 /* 5429 * EHT requires HE to be supported as well. Specifically for 6 GHz 5430 * channels, the operation channel information can only be deduced from 5431 * both the 6 GHz operation information (from the HE operation IE) and 5432 * EHT operation. 5433 */ 5434 if (!(ifmgd->flags & (IEEE80211_STA_DISABLE_HE | 5435 IEEE80211_STA_DISABLE_EHT)) && he_oper) { 5436 const struct cfg80211_bss_ies *ies; 5437 const u8 *eht_oper_ie; 5438 5439 ies = rcu_dereference(cbss->ies); 5440 eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION, 5441 ies->data, ies->len); 5442 if (eht_oper_ie && eht_oper_ie[1] >= 5443 1 + sizeof(struct ieee80211_eht_operation)) 5444 eht_oper = (void *)(eht_oper_ie + 3); 5445 else 5446 eht_oper = NULL; 5447 } 5448 5449 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5450 have_80mhz = false; 5451 for (i = 0; i < sband->n_channels; i++) { 5452 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5453 IEEE80211_CHAN_NO_80MHZ)) 5454 continue; 5455 5456 have_80mhz = true; 5457 break; 5458 } 5459 5460 if (!have_80mhz) { 5461 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5462 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5463 } 5464 5465 if (sband->band == NL80211_BAND_S1GHZ) { 5466 s1g_oper = elems->s1g_oper; 5467 if (!s1g_oper) 5468 sdata_info(sdata, 5469 "AP missing S1G operation element?\n"); 5470 } 5471 5472 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5473 cbss->channel, 5474 bss->vht_cap_info, 5475 ht_oper, vht_oper, 5476 he_oper, eht_oper, 5477 s1g_oper, 5478 &chandef, false); 5479 5480 sdata->deflink.needed_rx_chains = 5481 min(ieee80211_max_rx_chains(sdata, cbss), local->rx_chains); 5482 5483 rcu_read_unlock(); 5484 /* the element data was RCU protected so no longer valid anyway */ 5485 kfree(elems); 5486 elems = NULL; 5487 5488 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5489 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5490 return -EINVAL; 5491 } 5492 5493 /* will change later if needed */ 5494 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 5495 5496 mutex_lock(&local->mtx); 5497 /* 5498 * If this fails (possibly due to channel context sharing 5499 * on incompatible channels, e.g. 80+80 and 160 sharing the 5500 * same control channel) try to use a smaller bandwidth. 5501 */ 5502 ret = ieee80211_link_use_channel(&sdata->deflink, &chandef, 5503 IEEE80211_CHANCTX_SHARED); 5504 5505 /* don't downgrade for 5 and 10 MHz channels, though. */ 5506 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5507 chandef.width == NL80211_CHAN_WIDTH_10) 5508 goto out; 5509 5510 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5511 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5512 ret = ieee80211_link_use_channel(&sdata->deflink, &chandef, 5513 IEEE80211_CHANCTX_SHARED); 5514 } 5515 out: 5516 mutex_unlock(&local->mtx); 5517 return ret; 5518 } 5519 5520 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5521 u8 *dtim_count, u8 *dtim_period) 5522 { 5523 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5524 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5525 ies->len); 5526 const struct ieee80211_tim_ie *tim = NULL; 5527 const struct ieee80211_bssid_index *idx; 5528 bool valid = tim_ie && tim_ie[1] >= 2; 5529 5530 if (valid) 5531 tim = (void *)(tim_ie + 2); 5532 5533 if (dtim_count) 5534 *dtim_count = valid ? tim->dtim_count : 0; 5535 5536 if (dtim_period) 5537 *dtim_period = valid ? tim->dtim_period : 0; 5538 5539 /* Check if value is overridden by non-transmitted profile */ 5540 if (!idx_ie || idx_ie[1] < 3) 5541 return valid; 5542 5543 idx = (void *)(idx_ie + 2); 5544 5545 if (dtim_count) 5546 *dtim_count = idx->dtim_count; 5547 5548 if (dtim_period) 5549 *dtim_period = idx->dtim_period; 5550 5551 return true; 5552 } 5553 5554 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5555 struct cfg80211_bss *cbss, bool assoc, 5556 bool override) 5557 { 5558 struct ieee80211_local *local = sdata->local; 5559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5560 struct ieee80211_bss *bss = (void *)cbss->priv; 5561 struct sta_info *new_sta = NULL; 5562 struct ieee80211_supported_band *sband; 5563 bool have_sta = false; 5564 int err; 5565 5566 sband = local->hw.wiphy->bands[cbss->channel->band]; 5567 5568 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5569 return -EINVAL; 5570 5571 /* If a reconfig is happening, bail out */ 5572 if (local->in_reconfig) 5573 return -EBUSY; 5574 5575 if (assoc) { 5576 rcu_read_lock(); 5577 have_sta = sta_info_get(sdata, cbss->bssid); 5578 rcu_read_unlock(); 5579 } 5580 5581 if (!have_sta) { 5582 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5583 if (!new_sta) 5584 return -ENOMEM; 5585 } 5586 5587 /* 5588 * Set up the information for the new channel before setting the 5589 * new channel. We can't - completely race-free - change the basic 5590 * rates bitmap and the channel (sband) that it refers to, but if 5591 * we set it up before we at least avoid calling into the driver's 5592 * bss_info_changed() method with invalid information (since we do 5593 * call that from changing the channel - only for IDLE and perhaps 5594 * some others, but ...). 5595 * 5596 * So to avoid that, just set up all the new information before the 5597 * channel, but tell the driver to apply it only afterwards, since 5598 * it might need the new channel for that. 5599 */ 5600 if (new_sta) { 5601 u32 rates = 0, basic_rates = 0; 5602 bool have_higher_than_11mbit = false; 5603 int min_rate = INT_MAX, min_rate_index = -1; 5604 const struct cfg80211_bss_ies *ies; 5605 int shift = ieee80211_vif_get_shift(&sdata->vif); 5606 5607 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5608 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5609 ieee80211_s1g_sta_rate_init(new_sta); 5610 goto skip_rates; 5611 } 5612 5613 ieee80211_get_rates(sband, bss->supp_rates, 5614 bss->supp_rates_len, 5615 &rates, &basic_rates, 5616 &have_higher_than_11mbit, 5617 &min_rate, &min_rate_index, 5618 shift); 5619 5620 /* 5621 * This used to be a workaround for basic rates missing 5622 * in the association response frame. Now that we no 5623 * longer use the basic rates from there, it probably 5624 * doesn't happen any more, but keep the workaround so 5625 * in case some *other* APs are buggy in different ways 5626 * we can connect -- with a warning. 5627 * Allow this workaround only in case the AP provided at least 5628 * one rate. 5629 */ 5630 if (min_rate_index < 0) { 5631 sdata_info(sdata, 5632 "No legacy rates in association response\n"); 5633 5634 sta_info_free(local, new_sta); 5635 return -EINVAL; 5636 } else if (!basic_rates) { 5637 sdata_info(sdata, 5638 "No basic rates, using min rate instead\n"); 5639 basic_rates = BIT(min_rate_index); 5640 } 5641 5642 if (rates) 5643 new_sta->sta.deflink.supp_rates[cbss->channel->band] = rates; 5644 else 5645 sdata_info(sdata, 5646 "No rates found, keeping mandatory only\n"); 5647 5648 sdata->vif.bss_conf.basic_rates = basic_rates; 5649 5650 /* cf. IEEE 802.11 9.2.12 */ 5651 if (cbss->channel->band == NL80211_BAND_2GHZ && 5652 have_higher_than_11mbit) 5653 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5654 else 5655 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5656 5657 skip_rates: 5658 memcpy(sdata->deflink.u.mgd.bssid, cbss->bssid, ETH_ALEN); 5659 5660 /* set timing information */ 5661 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5662 rcu_read_lock(); 5663 ies = rcu_dereference(cbss->beacon_ies); 5664 if (ies) { 5665 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5666 sdata->vif.bss_conf.sync_device_ts = 5667 bss->device_ts_beacon; 5668 5669 ieee80211_get_dtim(ies, 5670 &sdata->vif.bss_conf.sync_dtim_count, 5671 NULL); 5672 } else if (!ieee80211_hw_check(&sdata->local->hw, 5673 TIMING_BEACON_ONLY)) { 5674 ies = rcu_dereference(cbss->proberesp_ies); 5675 /* must be non-NULL since beacon IEs were NULL */ 5676 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5677 sdata->vif.bss_conf.sync_device_ts = 5678 bss->device_ts_presp; 5679 sdata->vif.bss_conf.sync_dtim_count = 0; 5680 } else { 5681 sdata->vif.bss_conf.sync_tsf = 0; 5682 sdata->vif.bss_conf.sync_device_ts = 0; 5683 sdata->vif.bss_conf.sync_dtim_count = 0; 5684 } 5685 rcu_read_unlock(); 5686 } 5687 5688 if (new_sta || override) { 5689 err = ieee80211_prep_channel(sdata, cbss); 5690 if (err) { 5691 if (new_sta) 5692 sta_info_free(local, new_sta); 5693 return -EINVAL; 5694 } 5695 } 5696 5697 if (new_sta) { 5698 /* 5699 * tell driver about BSSID, basic rates and timing 5700 * this was set up above, before setting the channel 5701 */ 5702 ieee80211_link_info_change_notify(sdata, 0, 5703 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5704 BSS_CHANGED_BEACON_INT); 5705 5706 if (assoc) 5707 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5708 5709 err = sta_info_insert(new_sta); 5710 new_sta = NULL; 5711 if (err) { 5712 sdata_info(sdata, 5713 "failed to insert STA entry for the AP (error %d)\n", 5714 err); 5715 return err; 5716 } 5717 } else 5718 WARN_ON_ONCE(!ether_addr_equal(sdata->deflink.u.mgd.bssid, cbss->bssid)); 5719 5720 /* Cancel scan to ensure that nothing interferes with connection */ 5721 if (local->scanning) 5722 ieee80211_scan_cancel(local); 5723 5724 return 0; 5725 } 5726 5727 /* config hooks */ 5728 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5729 struct cfg80211_auth_request *req) 5730 { 5731 struct ieee80211_local *local = sdata->local; 5732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5733 struct ieee80211_mgd_auth_data *auth_data; 5734 u16 auth_alg; 5735 int err; 5736 bool cont_auth; 5737 5738 /* prepare auth data structure */ 5739 5740 switch (req->auth_type) { 5741 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5742 auth_alg = WLAN_AUTH_OPEN; 5743 break; 5744 case NL80211_AUTHTYPE_SHARED_KEY: 5745 if (fips_enabled) 5746 return -EOPNOTSUPP; 5747 auth_alg = WLAN_AUTH_SHARED_KEY; 5748 break; 5749 case NL80211_AUTHTYPE_FT: 5750 auth_alg = WLAN_AUTH_FT; 5751 break; 5752 case NL80211_AUTHTYPE_NETWORK_EAP: 5753 auth_alg = WLAN_AUTH_LEAP; 5754 break; 5755 case NL80211_AUTHTYPE_SAE: 5756 auth_alg = WLAN_AUTH_SAE; 5757 break; 5758 case NL80211_AUTHTYPE_FILS_SK: 5759 auth_alg = WLAN_AUTH_FILS_SK; 5760 break; 5761 case NL80211_AUTHTYPE_FILS_SK_PFS: 5762 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5763 break; 5764 case NL80211_AUTHTYPE_FILS_PK: 5765 auth_alg = WLAN_AUTH_FILS_PK; 5766 break; 5767 default: 5768 return -EOPNOTSUPP; 5769 } 5770 5771 if (ifmgd->assoc_data) 5772 return -EBUSY; 5773 5774 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5775 req->ie_len, GFP_KERNEL); 5776 if (!auth_data) 5777 return -ENOMEM; 5778 5779 auth_data->bss = req->bss; 5780 5781 if (req->auth_data_len >= 4) { 5782 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5783 __le16 *pos = (__le16 *) req->auth_data; 5784 5785 auth_data->sae_trans = le16_to_cpu(pos[0]); 5786 auth_data->sae_status = le16_to_cpu(pos[1]); 5787 } 5788 memcpy(auth_data->data, req->auth_data + 4, 5789 req->auth_data_len - 4); 5790 auth_data->data_len += req->auth_data_len - 4; 5791 } 5792 5793 /* Check if continuing authentication or trying to authenticate with the 5794 * same BSS that we were in the process of authenticating with and avoid 5795 * removal and re-addition of the STA entry in 5796 * ieee80211_prep_connection(). 5797 */ 5798 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5799 5800 if (req->ie && req->ie_len) { 5801 memcpy(&auth_data->data[auth_data->data_len], 5802 req->ie, req->ie_len); 5803 auth_data->data_len += req->ie_len; 5804 } 5805 5806 if (req->key && req->key_len) { 5807 auth_data->key_len = req->key_len; 5808 auth_data->key_idx = req->key_idx; 5809 memcpy(auth_data->key, req->key, req->key_len); 5810 } 5811 5812 auth_data->algorithm = auth_alg; 5813 5814 /* try to authenticate/probe */ 5815 5816 if (ifmgd->auth_data) { 5817 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5818 auth_data->peer_confirmed = 5819 ifmgd->auth_data->peer_confirmed; 5820 } 5821 ieee80211_destroy_auth_data(sdata, cont_auth); 5822 } 5823 5824 /* prep auth_data so we don't go into idle on disassoc */ 5825 ifmgd->auth_data = auth_data; 5826 5827 /* If this is continuation of an ongoing SAE authentication exchange 5828 * (i.e., request to send SAE Confirm) and the peer has already 5829 * confirmed, mark authentication completed since we are about to send 5830 * out SAE Confirm. 5831 */ 5832 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5833 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5834 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5835 5836 if (ifmgd->associated) { 5837 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5838 5839 sdata_info(sdata, 5840 "disconnect from AP %pM for new auth to %pM\n", 5841 sdata->deflink.u.mgd.bssid, req->bss->bssid); 5842 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5843 WLAN_REASON_UNSPECIFIED, 5844 false, frame_buf); 5845 5846 ieee80211_report_disconnect(sdata, frame_buf, 5847 sizeof(frame_buf), true, 5848 WLAN_REASON_UNSPECIFIED, 5849 false); 5850 } 5851 5852 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5853 5854 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5855 if (err) 5856 goto err_clear; 5857 5858 err = ieee80211_auth(sdata); 5859 if (err) { 5860 sta_info_destroy_addr(sdata, req->bss->bssid); 5861 goto err_clear; 5862 } 5863 5864 /* hold our own reference */ 5865 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5866 return 0; 5867 5868 err_clear: 5869 eth_zero_addr(sdata->deflink.u.mgd.bssid); 5870 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_BSSID); 5871 ifmgd->auth_data = NULL; 5872 mutex_lock(&sdata->local->mtx); 5873 ieee80211_link_release_channel(&sdata->deflink); 5874 mutex_unlock(&sdata->local->mtx); 5875 kfree(auth_data); 5876 return err; 5877 } 5878 5879 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5880 struct cfg80211_assoc_request *req) 5881 { 5882 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5883 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5884 struct ieee80211_local *local = sdata->local; 5885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5886 struct ieee80211_bss *bss = (void *)req->bss->priv; 5887 struct ieee80211_mgd_assoc_data *assoc_data; 5888 const struct cfg80211_bss_ies *beacon_ies; 5889 struct ieee80211_supported_band *sband; 5890 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 5891 const struct element *ssid_elem, *ht_elem, *vht_elem; 5892 int i, err; 5893 bool override = false; 5894 5895 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5896 if (!assoc_data) 5897 return -ENOMEM; 5898 5899 rcu_read_lock(); 5900 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5901 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5902 rcu_read_unlock(); 5903 kfree(assoc_data); 5904 return -EINVAL; 5905 } 5906 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5907 assoc_data->ssid_len = ssid_elem->datalen; 5908 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 5909 vif_cfg->ssid_len = assoc_data->ssid_len; 5910 rcu_read_unlock(); 5911 5912 if (ifmgd->associated) { 5913 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5914 5915 sdata_info(sdata, 5916 "disconnect from AP %pM for new assoc to %pM\n", 5917 sdata->deflink.u.mgd.bssid, req->bss->bssid); 5918 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5919 WLAN_REASON_UNSPECIFIED, 5920 false, frame_buf); 5921 5922 ieee80211_report_disconnect(sdata, frame_buf, 5923 sizeof(frame_buf), true, 5924 WLAN_REASON_UNSPECIFIED, 5925 false); 5926 } 5927 5928 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5929 err = -EBUSY; 5930 goto err_free; 5931 } 5932 5933 if (ifmgd->assoc_data) { 5934 err = -EBUSY; 5935 goto err_free; 5936 } 5937 5938 if (ifmgd->auth_data) { 5939 bool match; 5940 5941 /* keep sta info, bssid if matching */ 5942 match = ether_addr_equal(sdata->deflink.u.mgd.bssid, 5943 req->bss->bssid); 5944 ieee80211_destroy_auth_data(sdata, match); 5945 } 5946 5947 /* prepare assoc data */ 5948 5949 sdata->deflink.u.mgd.beacon_crc_valid = false; 5950 5951 assoc_data->wmm = bss->wmm_used && 5952 (local->hw.queues >= IEEE80211_NUM_ACS); 5953 5954 /* 5955 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5956 * We still associate in non-HT mode (11a/b/g) if any one of these 5957 * ciphers is configured as pairwise. 5958 * We can set this to true for non-11n hardware, that'll be checked 5959 * separately along with the peer capabilities. 5960 */ 5961 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5962 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5963 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5964 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5965 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5966 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5967 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5968 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5969 netdev_info(sdata->dev, 5970 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5971 } 5972 } 5973 5974 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5975 5976 /* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */ 5977 if (!bss->wmm_used) { 5978 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5979 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5980 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5981 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 5982 netdev_info(sdata->dev, 5983 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5984 } 5985 5986 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5987 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5988 sizeof(ifmgd->ht_capa_mask)); 5989 5990 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5991 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5992 sizeof(ifmgd->vht_capa_mask)); 5993 5994 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5995 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5996 sizeof(ifmgd->s1g_capa_mask)); 5997 5998 if (req->ie && req->ie_len) { 5999 memcpy(assoc_data->ie, req->ie, req->ie_len); 6000 assoc_data->ie_len = req->ie_len; 6001 } 6002 6003 if (req->fils_kek) { 6004 /* should already be checked in cfg80211 - so warn */ 6005 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 6006 err = -EINVAL; 6007 goto err_free; 6008 } 6009 memcpy(assoc_data->fils_kek, req->fils_kek, 6010 req->fils_kek_len); 6011 assoc_data->fils_kek_len = req->fils_kek_len; 6012 } 6013 6014 if (req->fils_nonces) 6015 memcpy(assoc_data->fils_nonces, req->fils_nonces, 6016 2 * FILS_NONCE_LEN); 6017 6018 assoc_data->bss = req->bss; 6019 assoc_data->capability = req->bss->capability; 6020 assoc_data->supp_rates = bss->supp_rates; 6021 assoc_data->supp_rates_len = bss->supp_rates_len; 6022 6023 rcu_read_lock(); 6024 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 6025 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 6026 assoc_data->ap_ht_param = 6027 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 6028 else if (!is_6ghz) 6029 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 6030 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 6031 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 6032 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 6033 sizeof(struct ieee80211_vht_cap)); 6034 } else if (is_5ghz) { 6035 sdata_info(sdata, 6036 "VHT capa missing/short, disabling VHT/HE/EHT\n"); 6037 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 6038 IEEE80211_STA_DISABLE_HE | 6039 IEEE80211_STA_DISABLE_EHT; 6040 } 6041 rcu_read_unlock(); 6042 6043 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 6044 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 6045 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 6046 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 6047 6048 if (bss->wmm_used && bss->uapsd_supported && 6049 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 6050 assoc_data->uapsd = true; 6051 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 6052 } else { 6053 assoc_data->uapsd = false; 6054 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 6055 } 6056 6057 if (req->prev_bssid) 6058 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 6059 6060 if (req->use_mfp) { 6061 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 6062 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 6063 } else { 6064 ifmgd->mfp = IEEE80211_MFP_DISABLED; 6065 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 6066 } 6067 6068 if (req->flags & ASSOC_REQ_USE_RRM) 6069 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 6070 else 6071 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 6072 6073 if (req->crypto.control_port) 6074 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 6075 else 6076 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 6077 6078 sdata->control_port_protocol = req->crypto.control_port_ethertype; 6079 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 6080 sdata->control_port_over_nl80211 = 6081 req->crypto.control_port_over_nl80211; 6082 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 6083 6084 /* kick off associate process */ 6085 6086 ifmgd->assoc_data = assoc_data; 6087 sdata->deflink.u.mgd.dtim_period = 0; 6088 sdata->deflink.u.mgd.have_beacon = false; 6089 6090 /* override HT/VHT configuration only if the AP and we support it */ 6091 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 6092 struct ieee80211_sta_ht_cap sta_ht_cap; 6093 6094 if (req->flags & ASSOC_REQ_DISABLE_HT) 6095 override = true; 6096 6097 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 6098 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6099 6100 /* check for 40 MHz disable override */ 6101 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 6102 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 6103 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 6104 override = true; 6105 6106 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 6107 req->flags & ASSOC_REQ_DISABLE_VHT) 6108 override = true; 6109 } 6110 6111 if (req->flags & ASSOC_REQ_DISABLE_HT) { 6112 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 6113 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 6114 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 6115 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 6116 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 6117 } 6118 6119 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 6120 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 6121 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 6122 } 6123 6124 if (req->flags & ASSOC_REQ_DISABLE_HE) { 6125 mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n"); 6126 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 6127 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 6128 } 6129 6130 if (req->flags & ASSOC_REQ_DISABLE_EHT) 6131 ifmgd->flags |= IEEE80211_STA_DISABLE_EHT; 6132 6133 err = ieee80211_prep_connection(sdata, req->bss, true, override); 6134 if (err) 6135 goto err_clear; 6136 6137 if (sdata->deflink.u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 6138 if (ifmgd->powersave) 6139 sdata->deflink.smps_mode = IEEE80211_SMPS_DYNAMIC; 6140 else 6141 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 6142 } else { 6143 sdata->deflink.smps_mode = sdata->deflink.u.mgd.req_smps; 6144 } 6145 6146 rcu_read_lock(); 6147 beacon_ies = rcu_dereference(req->bss->beacon_ies); 6148 6149 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 6150 !beacon_ies) { 6151 /* 6152 * Wait up to one beacon interval ... 6153 * should this be more if we miss one? 6154 */ 6155 sdata_info(sdata, "waiting for beacon from %pM\n", 6156 sdata->deflink.u.mgd.bssid); 6157 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 6158 assoc_data->timeout_started = true; 6159 assoc_data->need_beacon = true; 6160 } else if (beacon_ies) { 6161 const struct element *elem; 6162 u8 dtim_count = 0; 6163 6164 ieee80211_get_dtim(beacon_ies, &dtim_count, 6165 &sdata->deflink.u.mgd.dtim_period); 6166 6167 sdata->deflink.u.mgd.have_beacon = true; 6168 assoc_data->timeout = jiffies; 6169 assoc_data->timeout_started = true; 6170 6171 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6172 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 6173 sdata->vif.bss_conf.sync_device_ts = 6174 bss->device_ts_beacon; 6175 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 6176 } 6177 6178 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 6179 beacon_ies->data, beacon_ies->len); 6180 if (elem && elem->datalen >= 3) 6181 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 6182 else 6183 sdata->vif.bss_conf.profile_periodicity = 0; 6184 6185 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 6186 beacon_ies->data, beacon_ies->len); 6187 if (elem && elem->datalen >= 11 && 6188 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6189 sdata->vif.bss_conf.ema_ap = true; 6190 else 6191 sdata->vif.bss_conf.ema_ap = false; 6192 } else { 6193 assoc_data->timeout = jiffies; 6194 assoc_data->timeout_started = true; 6195 } 6196 rcu_read_unlock(); 6197 6198 run_again(sdata, assoc_data->timeout); 6199 6200 if (bss->corrupt_data) { 6201 char *corrupt_type = "data"; 6202 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 6203 if (bss->corrupt_data & 6204 IEEE80211_BSS_CORRUPT_PROBE_RESP) 6205 corrupt_type = "beacon and probe response"; 6206 else 6207 corrupt_type = "beacon"; 6208 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 6209 corrupt_type = "probe response"; 6210 sdata_info(sdata, "associating with AP with corrupt %s\n", 6211 corrupt_type); 6212 } 6213 6214 return 0; 6215 err_clear: 6216 eth_zero_addr(sdata->deflink.u.mgd.bssid); 6217 ieee80211_link_info_change_notify(sdata, 0, BSS_CHANGED_BSSID); 6218 ifmgd->assoc_data = NULL; 6219 err_free: 6220 kfree(assoc_data); 6221 return err; 6222 } 6223 6224 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 6225 struct cfg80211_deauth_request *req) 6226 { 6227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6228 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6229 bool tx = !req->local_state_change; 6230 struct ieee80211_prep_tx_info info = { 6231 .subtype = IEEE80211_STYPE_DEAUTH, 6232 }; 6233 6234 if (ifmgd->auth_data && 6235 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 6236 sdata_info(sdata, 6237 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 6238 req->bssid, req->reason_code, 6239 ieee80211_get_reason_code_string(req->reason_code)); 6240 6241 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6242 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6243 IEEE80211_STYPE_DEAUTH, 6244 req->reason_code, tx, 6245 frame_buf); 6246 ieee80211_destroy_auth_data(sdata, false); 6247 ieee80211_report_disconnect(sdata, frame_buf, 6248 sizeof(frame_buf), true, 6249 req->reason_code, false); 6250 drv_mgd_complete_tx(sdata->local, sdata, &info); 6251 return 0; 6252 } 6253 6254 if (ifmgd->assoc_data && 6255 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 6256 sdata_info(sdata, 6257 "aborting association with %pM by local choice (Reason: %u=%s)\n", 6258 req->bssid, req->reason_code, 6259 ieee80211_get_reason_code_string(req->reason_code)); 6260 6261 drv_mgd_prepare_tx(sdata->local, sdata, &info); 6262 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 6263 IEEE80211_STYPE_DEAUTH, 6264 req->reason_code, tx, 6265 frame_buf); 6266 ieee80211_destroy_assoc_data(sdata, false, true); 6267 ieee80211_report_disconnect(sdata, frame_buf, 6268 sizeof(frame_buf), true, 6269 req->reason_code, false); 6270 return 0; 6271 } 6272 6273 if (ifmgd->associated && 6274 ether_addr_equal(sdata->deflink.u.mgd.bssid, req->bssid)) { 6275 sdata_info(sdata, 6276 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 6277 req->bssid, req->reason_code, 6278 ieee80211_get_reason_code_string(req->reason_code)); 6279 6280 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6281 req->reason_code, tx, frame_buf); 6282 ieee80211_report_disconnect(sdata, frame_buf, 6283 sizeof(frame_buf), true, 6284 req->reason_code, false); 6285 drv_mgd_complete_tx(sdata->local, sdata, &info); 6286 return 0; 6287 } 6288 6289 return -ENOTCONN; 6290 } 6291 6292 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 6293 struct cfg80211_disassoc_request *req) 6294 { 6295 u8 bssid[ETH_ALEN]; 6296 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6297 6298 /* 6299 * cfg80211 should catch this ... but it's racy since 6300 * we can receive a disassoc frame, process it, hand it 6301 * to cfg80211 while that's in a locked section already 6302 * trying to tell us that the user wants to disconnect. 6303 */ 6304 if (sdata->deflink.u.mgd.bss != req->bss) 6305 return -ENOLINK; 6306 6307 sdata_info(sdata, 6308 "disassociating from %pM by local choice (Reason: %u=%s)\n", 6309 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 6310 6311 memcpy(bssid, req->bss->bssid, ETH_ALEN); 6312 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 6313 req->reason_code, !req->local_state_change, 6314 frame_buf); 6315 6316 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6317 req->reason_code, false); 6318 6319 return 0; 6320 } 6321 6322 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 6323 { 6324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6325 6326 /* 6327 * Make sure some work items will not run after this, 6328 * they will not do anything but might not have been 6329 * cancelled when disconnecting. 6330 */ 6331 cancel_work_sync(&ifmgd->monitor_work); 6332 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 6333 cancel_work_sync(&sdata->deflink.u.mgd.request_smps_work); 6334 cancel_work_sync(&ifmgd->csa_connection_drop_work); 6335 cancel_work_sync(&ifmgd->chswitch_work); 6336 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 6337 6338 sdata_lock(sdata); 6339 if (ifmgd->assoc_data) { 6340 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 6341 ieee80211_destroy_assoc_data(sdata, false, false); 6342 cfg80211_assoc_timeout(sdata->dev, bss); 6343 } 6344 if (ifmgd->auth_data) 6345 ieee80211_destroy_auth_data(sdata, false); 6346 spin_lock_bh(&ifmgd->teardown_lock); 6347 if (ifmgd->teardown_skb) { 6348 kfree_skb(ifmgd->teardown_skb); 6349 ifmgd->teardown_skb = NULL; 6350 ifmgd->orig_teardown_skb = NULL; 6351 } 6352 kfree(ifmgd->assoc_req_ies); 6353 ifmgd->assoc_req_ies = NULL; 6354 ifmgd->assoc_req_ies_len = 0; 6355 spin_unlock_bh(&ifmgd->teardown_lock); 6356 del_timer_sync(&ifmgd->timer); 6357 sdata_unlock(sdata); 6358 } 6359 6360 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6361 enum nl80211_cqm_rssi_threshold_event rssi_event, 6362 s32 rssi_level, 6363 gfp_t gfp) 6364 { 6365 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6366 6367 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6368 6369 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6370 } 6371 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6372 6373 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6374 { 6375 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6376 6377 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6378 6379 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6380 } 6381 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6382 6383 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 6384 int rssi_min_thold, 6385 int rssi_max_thold) 6386 { 6387 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 6388 6389 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 6390 return; 6391 6392 /* 6393 * Scale up threshold values before storing it, as the RSSI averaging 6394 * algorithm uses a scaled up value as well. Change this scaling 6395 * factor if the RSSI averaging algorithm changes. 6396 */ 6397 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 6398 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 6399 } 6400 6401 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 6402 int rssi_min_thold, 6403 int rssi_max_thold) 6404 { 6405 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6406 6407 WARN_ON(rssi_min_thold == rssi_max_thold || 6408 rssi_min_thold > rssi_max_thold); 6409 6410 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 6411 rssi_max_thold); 6412 } 6413 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 6414 6415 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 6416 { 6417 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6418 6419 _ieee80211_enable_rssi_reports(sdata, 0, 0); 6420 } 6421 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 6422