1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2021 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 u32 vht_cap_info, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 const struct ieee80211_he_operation *he_oper, 152 const struct ieee80211_s1g_oper_ie *s1g_oper, 153 struct cfg80211_chan_def *chandef, bool tracking) 154 { 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 156 struct cfg80211_chan_def vht_chandef; 157 struct ieee80211_sta_ht_cap sta_ht_cap; 158 u32 ht_cfreq, ret; 159 160 memset(chandef, 0, sizeof(struct cfg80211_chan_def)); 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->freq1_offset = channel->freq_offset; 165 166 if (channel->band == NL80211_BAND_6GHZ) { 167 if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) { 168 mlme_dbg(sdata, 169 "bad 6 GHz operation, disabling HT/VHT/HE\n"); 170 ret = IEEE80211_STA_DISABLE_HT | 171 IEEE80211_STA_DISABLE_VHT | 172 IEEE80211_STA_DISABLE_HE; 173 } else { 174 ret = 0; 175 } 176 vht_chandef = *chandef; 177 goto out; 178 } else if (sband->band == NL80211_BAND_S1GHZ) { 179 if (!ieee80211_chandef_s1g_oper(s1g_oper, chandef)) { 180 sdata_info(sdata, 181 "Missing S1G Operation Element? Trying operating == primary\n"); 182 chandef->width = ieee80211_s1g_channel_width(channel); 183 } 184 185 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_40MHZ | 186 IEEE80211_STA_DISABLE_VHT | 187 IEEE80211_STA_DISABLE_80P80MHZ | 188 IEEE80211_STA_DISABLE_160MHZ; 189 goto out; 190 } 191 192 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 193 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 194 195 if (!ht_oper || !sta_ht_cap.ht_supported) { 196 mlme_dbg(sdata, "HT operation missing / HT not supported\n"); 197 ret = IEEE80211_STA_DISABLE_HT | 198 IEEE80211_STA_DISABLE_VHT | 199 IEEE80211_STA_DISABLE_HE; 200 goto out; 201 } 202 203 chandef->width = NL80211_CHAN_WIDTH_20; 204 205 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 206 channel->band); 207 /* check that channel matches the right operating channel */ 208 if (!tracking && channel->center_freq != ht_cfreq) { 209 /* 210 * It's possible that some APs are confused here; 211 * Netgear WNDR3700 sometimes reports 4 higher than 212 * the actual channel in association responses, but 213 * since we look at probe response/beacon data here 214 * it should be OK. 215 */ 216 sdata_info(sdata, 217 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 218 channel->center_freq, ht_cfreq, 219 ht_oper->primary_chan, channel->band); 220 ret = IEEE80211_STA_DISABLE_HT | 221 IEEE80211_STA_DISABLE_VHT | 222 IEEE80211_STA_DISABLE_HE; 223 goto out; 224 } 225 226 /* check 40 MHz support, if we have it */ 227 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 228 ieee80211_chandef_ht_oper(ht_oper, chandef); 229 } else { 230 mlme_dbg(sdata, "40 MHz not supported\n"); 231 /* 40 MHz (and 80 MHz) must be supported for VHT */ 232 ret = IEEE80211_STA_DISABLE_VHT; 233 /* also mark 40 MHz disabled */ 234 ret |= IEEE80211_STA_DISABLE_40MHZ; 235 goto out; 236 } 237 238 if (!vht_oper || !sband->vht_cap.vht_supported) { 239 mlme_dbg(sdata, "VHT operation missing / VHT not supported\n"); 240 ret = IEEE80211_STA_DISABLE_VHT; 241 goto out; 242 } 243 244 vht_chandef = *chandef; 245 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && he_oper && 246 (le32_to_cpu(he_oper->he_oper_params) & 247 IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 248 struct ieee80211_vht_operation he_oper_vht_cap; 249 250 /* 251 * Set only first 3 bytes (other 2 aren't used in 252 * ieee80211_chandef_vht_oper() anyway) 253 */ 254 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 255 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 256 257 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 258 &he_oper_vht_cap, ht_oper, 259 &vht_chandef)) { 260 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 261 sdata_info(sdata, 262 "HE AP VHT information is invalid, disabling HE\n"); 263 ret = IEEE80211_STA_DISABLE_HE; 264 goto out; 265 } 266 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 267 vht_cap_info, 268 vht_oper, ht_oper, 269 &vht_chandef)) { 270 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 271 sdata_info(sdata, 272 "AP VHT information is invalid, disabling VHT\n"); 273 ret = IEEE80211_STA_DISABLE_VHT; 274 goto out; 275 } 276 277 if (!cfg80211_chandef_valid(&vht_chandef)) { 278 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 279 sdata_info(sdata, 280 "AP VHT information is invalid, disabling VHT\n"); 281 ret = IEEE80211_STA_DISABLE_VHT; 282 goto out; 283 } 284 285 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 286 ret = 0; 287 goto out; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 292 sdata_info(sdata, 293 "AP VHT information doesn't match HT, disabling VHT\n"); 294 ret = IEEE80211_STA_DISABLE_VHT; 295 goto out; 296 } 297 298 *chandef = vht_chandef; 299 300 ret = 0; 301 302 out: 303 /* 304 * When tracking the current AP, don't do any further checks if the 305 * new chandef is identical to the one we're currently using for the 306 * connection. This keeps us from playing ping-pong with regulatory, 307 * without it the following can happen (for example): 308 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 309 * - AP advertises regdom US 310 * - CRDA loads regdom US with 80 MHz prohibited (old database) 311 * - the code below detects an unsupported channel, downgrades, and 312 * we disconnect from the AP in the caller 313 * - disconnect causes CRDA to reload world regdomain and the game 314 * starts anew. 315 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 316 * 317 * It seems possible that there are still scenarios with CSA or real 318 * bandwidth changes where a this could happen, but those cases are 319 * less common and wouldn't completely prevent using the AP. 320 */ 321 if (tracking && 322 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 323 return ret; 324 325 /* don't print the message below for VHT mismatch if VHT is disabled */ 326 if (ret & IEEE80211_STA_DISABLE_VHT) 327 vht_chandef = *chandef; 328 329 /* 330 * Ignore the DISABLED flag when we're already connected and only 331 * tracking the APs beacon for bandwidth changes - otherwise we 332 * might get disconnected here if we connect to an AP, update our 333 * regulatory information based on the AP's country IE and the 334 * information we have is wrong/outdated and disables the channel 335 * that we're actually using for the connection to the AP. 336 */ 337 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 338 tracking ? 0 : 339 IEEE80211_CHAN_DISABLED)) { 340 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 341 ret = IEEE80211_STA_DISABLE_HT | 342 IEEE80211_STA_DISABLE_VHT | 343 IEEE80211_STA_DISABLE_HE; 344 break; 345 } 346 347 ret |= ieee80211_chandef_downgrade(chandef); 348 } 349 350 if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef, 351 IEEE80211_CHAN_NO_HE)) 352 ret |= IEEE80211_STA_DISABLE_HE; 353 354 if (chandef->width != vht_chandef.width && !tracking) 355 sdata_info(sdata, 356 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 357 358 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 359 return ret; 360 } 361 362 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 363 struct sta_info *sta, 364 const struct ieee80211_ht_cap *ht_cap, 365 const struct ieee80211_vht_cap *vht_cap, 366 const struct ieee80211_ht_operation *ht_oper, 367 const struct ieee80211_vht_operation *vht_oper, 368 const struct ieee80211_he_operation *he_oper, 369 const struct ieee80211_s1g_oper_ie *s1g_oper, 370 const u8 *bssid, u32 *changed) 371 { 372 struct ieee80211_local *local = sdata->local; 373 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 374 struct ieee80211_channel *chan = sdata->vif.bss_conf.chandef.chan; 375 struct ieee80211_supported_band *sband = 376 local->hw.wiphy->bands[chan->band]; 377 struct cfg80211_chan_def chandef; 378 u16 ht_opmode; 379 u32 flags; 380 u32 vht_cap_info = 0; 381 int ret; 382 383 /* if HT was/is disabled, don't track any bandwidth changes */ 384 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 385 return 0; 386 387 /* don't check VHT if we associated as non-VHT station */ 388 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 389 vht_oper = NULL; 390 391 /* don't check HE if we associated as non-HE station */ 392 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE || 393 !ieee80211_get_he_iftype_cap(sband, 394 ieee80211_vif_type_p2p(&sdata->vif))) 395 396 he_oper = NULL; 397 398 if (WARN_ON_ONCE(!sta)) 399 return -EINVAL; 400 401 /* 402 * if bss configuration changed store the new one - 403 * this may be applicable even if channel is identical 404 */ 405 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 406 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 407 *changed |= BSS_CHANGED_HT; 408 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 409 } 410 411 if (vht_cap) 412 vht_cap_info = le32_to_cpu(vht_cap->vht_cap_info); 413 414 /* calculate new channel (type) based on HT/VHT/HE operation IEs */ 415 flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info, 416 ht_oper, vht_oper, he_oper, 417 s1g_oper, &chandef, true); 418 419 /* 420 * Downgrade the new channel if we associated with restricted 421 * capabilities. For example, if we associated as a 20 MHz STA 422 * to a 40 MHz AP (due to regulatory, capabilities or config 423 * reasons) then switching to a 40 MHz channel now won't do us 424 * any good -- we couldn't use it with the AP. 425 */ 426 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 427 chandef.width == NL80211_CHAN_WIDTH_80P80) 428 flags |= ieee80211_chandef_downgrade(&chandef); 429 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 430 chandef.width == NL80211_CHAN_WIDTH_160) 431 flags |= ieee80211_chandef_downgrade(&chandef); 432 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 433 chandef.width > NL80211_CHAN_WIDTH_20) 434 flags |= ieee80211_chandef_downgrade(&chandef); 435 436 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 437 return 0; 438 439 sdata_info(sdata, 440 "AP %pM changed bandwidth, new config is %d.%03d MHz, " 441 "width %d (%d.%03d/%d MHz)\n", 442 ifmgd->bssid, chandef.chan->center_freq, 443 chandef.chan->freq_offset, chandef.width, 444 chandef.center_freq1, chandef.freq1_offset, 445 chandef.center_freq2); 446 447 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 448 IEEE80211_STA_DISABLE_VHT | 449 IEEE80211_STA_DISABLE_HE | 450 IEEE80211_STA_DISABLE_40MHZ | 451 IEEE80211_STA_DISABLE_80P80MHZ | 452 IEEE80211_STA_DISABLE_160MHZ)) || 453 !cfg80211_chandef_valid(&chandef)) { 454 sdata_info(sdata, 455 "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n", 456 ifmgd->bssid, flags, ifmgd->flags); 457 return -EINVAL; 458 } 459 460 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 461 462 if (ret) { 463 sdata_info(sdata, 464 "AP %pM changed bandwidth to incompatible one - disconnect\n", 465 ifmgd->bssid); 466 return ret; 467 } 468 469 return 0; 470 } 471 472 /* frame sending functions */ 473 474 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 475 struct sk_buff *skb, u8 ap_ht_param, 476 struct ieee80211_supported_band *sband, 477 struct ieee80211_channel *channel, 478 enum ieee80211_smps_mode smps) 479 { 480 u8 *pos; 481 u32 flags = channel->flags; 482 u16 cap; 483 struct ieee80211_sta_ht_cap ht_cap; 484 485 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 486 487 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 488 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 489 490 /* determine capability flags */ 491 cap = ht_cap.cap; 492 493 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 494 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 495 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 496 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 497 cap &= ~IEEE80211_HT_CAP_SGI_40; 498 } 499 break; 500 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 501 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 502 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 503 cap &= ~IEEE80211_HT_CAP_SGI_40; 504 } 505 break; 506 } 507 508 /* 509 * If 40 MHz was disabled associate as though we weren't 510 * capable of 40 MHz -- some broken APs will never fall 511 * back to trying to transmit in 20 MHz. 512 */ 513 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 514 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 515 cap &= ~IEEE80211_HT_CAP_SGI_40; 516 } 517 518 /* set SM PS mode properly */ 519 cap &= ~IEEE80211_HT_CAP_SM_PS; 520 switch (smps) { 521 case IEEE80211_SMPS_AUTOMATIC: 522 case IEEE80211_SMPS_NUM_MODES: 523 WARN_ON(1); 524 fallthrough; 525 case IEEE80211_SMPS_OFF: 526 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 527 IEEE80211_HT_CAP_SM_PS_SHIFT; 528 break; 529 case IEEE80211_SMPS_STATIC: 530 cap |= WLAN_HT_CAP_SM_PS_STATIC << 531 IEEE80211_HT_CAP_SM_PS_SHIFT; 532 break; 533 case IEEE80211_SMPS_DYNAMIC: 534 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 535 IEEE80211_HT_CAP_SM_PS_SHIFT; 536 break; 537 } 538 539 /* reserve and fill IE */ 540 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 541 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 542 } 543 544 /* This function determines vht capability flags for the association 545 * and builds the IE. 546 * Note - the function may set the owner of the MU-MIMO capability 547 */ 548 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 549 struct sk_buff *skb, 550 struct ieee80211_supported_band *sband, 551 struct ieee80211_vht_cap *ap_vht_cap) 552 { 553 struct ieee80211_local *local = sdata->local; 554 u8 *pos; 555 u32 cap; 556 struct ieee80211_sta_vht_cap vht_cap; 557 u32 mask, ap_bf_sts, our_bf_sts; 558 559 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 560 561 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 562 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 563 564 /* determine capability flags */ 565 cap = vht_cap.cap; 566 567 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 568 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 569 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 571 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 572 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 573 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 574 } 575 576 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 577 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 578 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 579 } 580 581 /* 582 * Some APs apparently get confused if our capabilities are better 583 * than theirs, so restrict what we advertise in the assoc request. 584 */ 585 if (!(ap_vht_cap->vht_cap_info & 586 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 587 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 588 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 589 else if (!(ap_vht_cap->vht_cap_info & 590 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 591 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 592 593 /* 594 * If some other vif is using the MU-MIMO capability we cannot associate 595 * using MU-MIMO - this will lead to contradictions in the group-id 596 * mechanism. 597 * Ownership is defined since association request, in order to avoid 598 * simultaneous associations with MU-MIMO. 599 */ 600 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 601 bool disable_mu_mimo = false; 602 struct ieee80211_sub_if_data *other; 603 604 list_for_each_entry_rcu(other, &local->interfaces, list) { 605 if (other->vif.mu_mimo_owner) { 606 disable_mu_mimo = true; 607 break; 608 } 609 } 610 if (disable_mu_mimo) 611 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 612 else 613 sdata->vif.mu_mimo_owner = true; 614 } 615 616 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 617 618 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 619 our_bf_sts = cap & mask; 620 621 if (ap_bf_sts < our_bf_sts) { 622 cap &= ~mask; 623 cap |= ap_bf_sts; 624 } 625 626 /* reserve and fill IE */ 627 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 628 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 629 } 630 631 /* This function determines HE capability flags for the association 632 * and builds the IE. 633 */ 634 static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata, 635 struct sk_buff *skb, 636 struct ieee80211_supported_band *sband) 637 { 638 u8 *pos; 639 const struct ieee80211_sta_he_cap *he_cap = NULL; 640 struct ieee80211_chanctx_conf *chanctx_conf; 641 u8 he_cap_size; 642 bool reg_cap = false; 643 644 rcu_read_lock(); 645 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 646 if (!WARN_ON_ONCE(!chanctx_conf)) 647 reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy, 648 &chanctx_conf->def, 649 IEEE80211_CHAN_NO_HE); 650 651 rcu_read_unlock(); 652 653 he_cap = ieee80211_get_he_iftype_cap(sband, 654 ieee80211_vif_type_p2p(&sdata->vif)); 655 if (!he_cap || !reg_cap) 656 return; 657 658 he_cap_size = 659 2 + 1 + sizeof(he_cap->he_cap_elem) + 660 ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) + 661 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 662 he_cap->he_cap_elem.phy_cap_info); 663 pos = skb_put(skb, he_cap_size); 664 ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size); 665 666 ieee80211_ie_build_he_6ghz_cap(sdata, skb); 667 } 668 669 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 670 { 671 struct ieee80211_local *local = sdata->local; 672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 673 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 674 struct sk_buff *skb; 675 struct ieee80211_mgmt *mgmt; 676 u8 *pos, qos_info, *ie_start; 677 size_t offset = 0, noffset; 678 int i, count, rates_len, supp_rates_len, shift; 679 u16 capab; 680 struct ieee80211_supported_band *sband; 681 struct ieee80211_chanctx_conf *chanctx_conf; 682 struct ieee80211_channel *chan; 683 u32 rates = 0; 684 __le16 listen_int; 685 struct element *ext_capa = NULL; 686 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 687 const struct ieee80211_sband_iftype_data *iftd; 688 struct ieee80211_prep_tx_info info = {}; 689 int ret; 690 691 /* we know it's writable, cast away the const */ 692 if (assoc_data->ie_len) 693 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 694 assoc_data->ie, 695 assoc_data->ie_len); 696 697 sdata_assert_lock(sdata); 698 699 rcu_read_lock(); 700 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 701 if (WARN_ON(!chanctx_conf)) { 702 rcu_read_unlock(); 703 return -EINVAL; 704 } 705 chan = chanctx_conf->def.chan; 706 rcu_read_unlock(); 707 sband = local->hw.wiphy->bands[chan->band]; 708 shift = ieee80211_vif_get_shift(&sdata->vif); 709 710 if (assoc_data->supp_rates_len) { 711 /* 712 * Get all rates supported by the device and the AP as 713 * some APs don't like getting a superset of their rates 714 * in the association request (e.g. D-Link DAP 1353 in 715 * b-only mode)... 716 */ 717 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 718 assoc_data->supp_rates, 719 assoc_data->supp_rates_len, 720 &rates); 721 } else { 722 /* 723 * In case AP not provide any supported rates information 724 * before association, we send information element(s) with 725 * all rates that we support. 726 */ 727 rates_len = 0; 728 for (i = 0; i < sband->n_bitrates; i++) { 729 rates |= BIT(i); 730 rates_len++; 731 } 732 } 733 734 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 735 736 skb = alloc_skb(local->hw.extra_tx_headroom + 737 sizeof(*mgmt) + /* bit too much but doesn't matter */ 738 2 + assoc_data->ssid_len + /* SSID */ 739 4 + rates_len + /* (extended) rates */ 740 4 + /* power capability */ 741 2 + 2 * sband->n_channels + /* supported channels */ 742 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 743 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 744 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */ 745 sizeof(struct ieee80211_he_mcs_nss_supp) + 746 IEEE80211_HE_PPE_THRES_MAX_LEN + 747 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 748 assoc_data->ie_len + /* extra IEs */ 749 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 750 9 + /* WMM */ 751 (iftd ? iftd->vendor_elems.len : 0), 752 GFP_KERNEL); 753 if (!skb) 754 return -ENOMEM; 755 756 skb_reserve(skb, local->hw.extra_tx_headroom); 757 758 capab = WLAN_CAPABILITY_ESS; 759 760 if (sband->band == NL80211_BAND_2GHZ) { 761 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 762 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 763 } 764 765 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 766 capab |= WLAN_CAPABILITY_PRIVACY; 767 768 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 769 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 770 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 771 772 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 773 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 774 775 mgmt = skb_put_zero(skb, 24); 776 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 777 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 778 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 779 780 listen_int = cpu_to_le16(sband->band == NL80211_BAND_S1GHZ ? 781 ieee80211_encode_usf(local->hw.conf.listen_interval) : 782 local->hw.conf.listen_interval); 783 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 784 skb_put(skb, 10); 785 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 786 IEEE80211_STYPE_REASSOC_REQ); 787 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 788 mgmt->u.reassoc_req.listen_interval = listen_int; 789 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 790 ETH_ALEN); 791 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 792 } else { 793 skb_put(skb, 4); 794 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 795 IEEE80211_STYPE_ASSOC_REQ); 796 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 797 mgmt->u.assoc_req.listen_interval = listen_int; 798 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 799 } 800 801 /* SSID */ 802 pos = skb_put(skb, 2 + assoc_data->ssid_len); 803 ie_start = pos; 804 *pos++ = WLAN_EID_SSID; 805 *pos++ = assoc_data->ssid_len; 806 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 807 808 if (sband->band == NL80211_BAND_S1GHZ) 809 goto skip_rates; 810 811 /* add all rates which were marked to be used above */ 812 supp_rates_len = rates_len; 813 if (supp_rates_len > 8) 814 supp_rates_len = 8; 815 816 pos = skb_put(skb, supp_rates_len + 2); 817 *pos++ = WLAN_EID_SUPP_RATES; 818 *pos++ = supp_rates_len; 819 820 count = 0; 821 for (i = 0; i < sband->n_bitrates; i++) { 822 if (BIT(i) & rates) { 823 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 824 5 * (1 << shift)); 825 *pos++ = (u8) rate; 826 if (++count == 8) 827 break; 828 } 829 } 830 831 if (rates_len > count) { 832 pos = skb_put(skb, rates_len - count + 2); 833 *pos++ = WLAN_EID_EXT_SUPP_RATES; 834 *pos++ = rates_len - count; 835 836 for (i++; i < sband->n_bitrates; i++) { 837 if (BIT(i) & rates) { 838 int rate; 839 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 840 5 * (1 << shift)); 841 *pos++ = (u8) rate; 842 } 843 } 844 } 845 846 skip_rates: 847 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 848 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 849 pos = skb_put(skb, 4); 850 *pos++ = WLAN_EID_PWR_CAPABILITY; 851 *pos++ = 2; 852 *pos++ = 0; /* min tx power */ 853 /* max tx power */ 854 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 855 } 856 857 /* 858 * Per spec, we shouldn't include the list of channels if we advertise 859 * support for extended channel switching, but we've always done that; 860 * (for now?) apply this restriction only on the (new) 6 GHz band. 861 */ 862 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 863 (sband->band != NL80211_BAND_6GHZ || 864 !ext_capa || ext_capa->datalen < 1 || 865 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 866 /* TODO: get this in reg domain format */ 867 pos = skb_put(skb, 2 * sband->n_channels + 2); 868 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 869 *pos++ = 2 * sband->n_channels; 870 for (i = 0; i < sband->n_channels; i++) { 871 *pos++ = ieee80211_frequency_to_channel( 872 sband->channels[i].center_freq); 873 *pos++ = 1; /* one channel in the subband*/ 874 } 875 } 876 877 /* Set MBSSID support for HE AP if needed */ 878 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 879 !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && assoc_data->ie_len && 880 ext_capa && ext_capa->datalen >= 3) 881 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 882 883 /* if present, add any custom IEs that go before HT */ 884 if (assoc_data->ie_len) { 885 static const u8 before_ht[] = { 886 WLAN_EID_SSID, 887 WLAN_EID_SUPP_RATES, 888 WLAN_EID_EXT_SUPP_RATES, 889 WLAN_EID_PWR_CAPABILITY, 890 WLAN_EID_SUPPORTED_CHANNELS, 891 WLAN_EID_RSN, 892 WLAN_EID_QOS_CAPA, 893 WLAN_EID_RRM_ENABLED_CAPABILITIES, 894 WLAN_EID_MOBILITY_DOMAIN, 895 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 896 WLAN_EID_RIC_DATA, /* reassoc only */ 897 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 898 }; 899 static const u8 after_ric[] = { 900 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 901 WLAN_EID_HT_CAPABILITY, 902 WLAN_EID_BSS_COEX_2040, 903 /* luckily this is almost always there */ 904 WLAN_EID_EXT_CAPABILITY, 905 WLAN_EID_QOS_TRAFFIC_CAPA, 906 WLAN_EID_TIM_BCAST_REQ, 907 WLAN_EID_INTERWORKING, 908 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 909 WLAN_EID_VHT_CAPABILITY, 910 WLAN_EID_OPMODE_NOTIF, 911 }; 912 913 noffset = ieee80211_ie_split_ric(assoc_data->ie, 914 assoc_data->ie_len, 915 before_ht, 916 ARRAY_SIZE(before_ht), 917 after_ric, 918 ARRAY_SIZE(after_ric), 919 offset); 920 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 921 offset = noffset; 922 } 923 924 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 925 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 926 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 927 928 if (sband->band != NL80211_BAND_6GHZ && 929 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 930 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 931 sband, chan, sdata->smps_mode); 932 933 /* if present, add any custom IEs that go before VHT */ 934 if (assoc_data->ie_len) { 935 static const u8 before_vht[] = { 936 /* 937 * no need to list the ones split off before HT 938 * or generated here 939 */ 940 WLAN_EID_BSS_COEX_2040, 941 WLAN_EID_EXT_CAPABILITY, 942 WLAN_EID_QOS_TRAFFIC_CAPA, 943 WLAN_EID_TIM_BCAST_REQ, 944 WLAN_EID_INTERWORKING, 945 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 946 }; 947 948 /* RIC already taken above, so no need to handle here anymore */ 949 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 950 before_vht, ARRAY_SIZE(before_vht), 951 offset); 952 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 953 offset = noffset; 954 } 955 956 /* if present, add any custom IEs that go before HE */ 957 if (assoc_data->ie_len) { 958 static const u8 before_he[] = { 959 /* 960 * no need to list the ones split off before VHT 961 * or generated here 962 */ 963 WLAN_EID_OPMODE_NOTIF, 964 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 965 /* 11ai elements */ 966 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 967 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 968 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 969 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 970 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 971 /* TODO: add 11ah/11aj/11ak elements */ 972 }; 973 974 /* RIC already taken above, so no need to handle here anymore */ 975 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 976 before_he, ARRAY_SIZE(before_he), 977 offset); 978 pos = skb_put(skb, noffset - offset); 979 memcpy(pos, assoc_data->ie + offset, noffset - offset); 980 offset = noffset; 981 } 982 983 if (sband->band != NL80211_BAND_6GHZ && 984 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 985 ieee80211_add_vht_ie(sdata, skb, sband, 986 &assoc_data->ap_vht_cap); 987 988 /* 989 * If AP doesn't support HT, mark HE as disabled. 990 * If on the 5GHz band, make sure it supports VHT. 991 */ 992 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || 993 (sband->band == NL80211_BAND_5GHZ && 994 ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 995 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 996 997 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) 998 ieee80211_add_he_ie(sdata, skb, sband); 999 1000 /* if present, add any custom non-vendor IEs that go after HE */ 1001 if (assoc_data->ie_len) { 1002 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1003 assoc_data->ie_len, 1004 offset); 1005 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1006 offset = noffset; 1007 } 1008 1009 if (assoc_data->wmm) { 1010 if (assoc_data->uapsd) { 1011 qos_info = ifmgd->uapsd_queues; 1012 qos_info |= (ifmgd->uapsd_max_sp_len << 1013 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1014 } else { 1015 qos_info = 0; 1016 } 1017 1018 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1019 } 1020 1021 if (sband->band == NL80211_BAND_S1GHZ) { 1022 ieee80211_add_aid_request_ie(sdata, skb); 1023 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1024 } 1025 1026 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1027 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1028 1029 /* add any remaining custom (i.e. vendor specific here) IEs */ 1030 if (assoc_data->ie_len) { 1031 noffset = assoc_data->ie_len; 1032 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1033 } 1034 1035 if (assoc_data->fils_kek_len) { 1036 ret = fils_encrypt_assoc_req(skb, assoc_data); 1037 if (ret < 0) { 1038 dev_kfree_skb(skb); 1039 return ret; 1040 } 1041 } 1042 1043 pos = skb_tail_pointer(skb); 1044 kfree(ifmgd->assoc_req_ies); 1045 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1046 if (!ifmgd->assoc_req_ies) { 1047 dev_kfree_skb(skb); 1048 return -ENOMEM; 1049 } 1050 1051 ifmgd->assoc_req_ies_len = pos - ie_start; 1052 1053 drv_mgd_prepare_tx(local, sdata, &info); 1054 1055 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1056 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1057 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1058 IEEE80211_TX_INTFL_MLME_CONN_TX; 1059 ieee80211_tx_skb(sdata, skb); 1060 1061 return 0; 1062 } 1063 1064 void ieee80211_send_pspoll(struct ieee80211_local *local, 1065 struct ieee80211_sub_if_data *sdata) 1066 { 1067 struct ieee80211_pspoll *pspoll; 1068 struct sk_buff *skb; 1069 1070 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1071 if (!skb) 1072 return; 1073 1074 pspoll = (struct ieee80211_pspoll *) skb->data; 1075 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1076 1077 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1078 ieee80211_tx_skb(sdata, skb); 1079 } 1080 1081 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1082 struct ieee80211_sub_if_data *sdata, 1083 bool powersave) 1084 { 1085 struct sk_buff *skb; 1086 struct ieee80211_hdr_3addr *nullfunc; 1087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1088 1089 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, 1090 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP)); 1091 if (!skb) 1092 return; 1093 1094 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1095 if (powersave) 1096 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1097 1098 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1099 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1100 1101 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1102 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1103 1104 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1105 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1106 1107 ieee80211_tx_skb(sdata, skb); 1108 } 1109 1110 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1111 struct ieee80211_sub_if_data *sdata) 1112 { 1113 struct sk_buff *skb; 1114 struct ieee80211_hdr *nullfunc; 1115 __le16 fc; 1116 1117 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1118 return; 1119 1120 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1121 if (!skb) 1122 return; 1123 1124 skb_reserve(skb, local->hw.extra_tx_headroom); 1125 1126 nullfunc = skb_put_zero(skb, 30); 1127 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1128 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1129 nullfunc->frame_control = fc; 1130 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 1131 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1132 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 1133 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1134 1135 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1136 ieee80211_tx_skb(sdata, skb); 1137 } 1138 1139 /* spectrum management related things */ 1140 static void ieee80211_chswitch_work(struct work_struct *work) 1141 { 1142 struct ieee80211_sub_if_data *sdata = 1143 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 1144 struct ieee80211_local *local = sdata->local; 1145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1146 int ret; 1147 1148 if (!ieee80211_sdata_running(sdata)) 1149 return; 1150 1151 sdata_lock(sdata); 1152 mutex_lock(&local->mtx); 1153 mutex_lock(&local->chanctx_mtx); 1154 1155 if (!ifmgd->associated) 1156 goto out; 1157 1158 if (!sdata->vif.csa_active) 1159 goto out; 1160 1161 /* 1162 * using reservation isn't immediate as it may be deferred until later 1163 * with multi-vif. once reservation is complete it will re-schedule the 1164 * work with no reserved_chanctx so verify chandef to check if it 1165 * completed successfully 1166 */ 1167 1168 if (sdata->reserved_chanctx) { 1169 /* 1170 * with multi-vif csa driver may call ieee80211_csa_finish() 1171 * many times while waiting for other interfaces to use their 1172 * reservations 1173 */ 1174 if (sdata->reserved_ready) 1175 goto out; 1176 1177 ret = ieee80211_vif_use_reserved_context(sdata); 1178 if (ret) { 1179 sdata_info(sdata, 1180 "failed to use reserved channel context, disconnecting (err=%d)\n", 1181 ret); 1182 ieee80211_queue_work(&sdata->local->hw, 1183 &ifmgd->csa_connection_drop_work); 1184 goto out; 1185 } 1186 1187 goto out; 1188 } 1189 1190 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1191 &sdata->csa_chandef)) { 1192 sdata_info(sdata, 1193 "failed to finalize channel switch, disconnecting\n"); 1194 ieee80211_queue_work(&sdata->local->hw, 1195 &ifmgd->csa_connection_drop_work); 1196 goto out; 1197 } 1198 1199 ifmgd->csa_waiting_bcn = true; 1200 1201 ieee80211_sta_reset_beacon_monitor(sdata); 1202 ieee80211_sta_reset_conn_monitor(sdata); 1203 1204 out: 1205 mutex_unlock(&local->chanctx_mtx); 1206 mutex_unlock(&local->mtx); 1207 sdata_unlock(sdata); 1208 } 1209 1210 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1211 { 1212 struct ieee80211_local *local = sdata->local; 1213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1214 int ret; 1215 1216 sdata_assert_lock(sdata); 1217 1218 WARN_ON(!sdata->vif.csa_active); 1219 1220 if (sdata->csa_block_tx) { 1221 ieee80211_wake_vif_queues(local, sdata, 1222 IEEE80211_QUEUE_STOP_REASON_CSA); 1223 sdata->csa_block_tx = false; 1224 } 1225 1226 sdata->vif.csa_active = false; 1227 ifmgd->csa_waiting_bcn = false; 1228 /* 1229 * If the CSA IE is still present on the beacon after the switch, 1230 * we need to consider it as a new CSA (possibly to self). 1231 */ 1232 ifmgd->beacon_crc_valid = false; 1233 1234 ret = drv_post_channel_switch(sdata); 1235 if (ret) { 1236 sdata_info(sdata, 1237 "driver post channel switch failed, disconnecting\n"); 1238 ieee80211_queue_work(&local->hw, 1239 &ifmgd->csa_connection_drop_work); 1240 return; 1241 } 1242 1243 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1244 } 1245 1246 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1247 { 1248 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1250 1251 trace_api_chswitch_done(sdata, success); 1252 if (!success) { 1253 sdata_info(sdata, 1254 "driver channel switch failed, disconnecting\n"); 1255 ieee80211_queue_work(&sdata->local->hw, 1256 &ifmgd->csa_connection_drop_work); 1257 } else { 1258 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1259 } 1260 } 1261 EXPORT_SYMBOL(ieee80211_chswitch_done); 1262 1263 static void ieee80211_chswitch_timer(struct timer_list *t) 1264 { 1265 struct ieee80211_sub_if_data *sdata = 1266 from_timer(sdata, t, u.mgd.chswitch_timer); 1267 1268 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1269 } 1270 1271 static void 1272 ieee80211_sta_abort_chanswitch(struct ieee80211_sub_if_data *sdata) 1273 { 1274 struct ieee80211_local *local = sdata->local; 1275 1276 if (!local->ops->abort_channel_switch) 1277 return; 1278 1279 mutex_lock(&local->mtx); 1280 1281 mutex_lock(&local->chanctx_mtx); 1282 ieee80211_vif_unreserve_chanctx(sdata); 1283 mutex_unlock(&local->chanctx_mtx); 1284 1285 if (sdata->csa_block_tx) 1286 ieee80211_wake_vif_queues(local, sdata, 1287 IEEE80211_QUEUE_STOP_REASON_CSA); 1288 1289 sdata->csa_block_tx = false; 1290 sdata->vif.csa_active = false; 1291 1292 mutex_unlock(&local->mtx); 1293 1294 drv_abort_channel_switch(sdata); 1295 } 1296 1297 static void 1298 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1299 u64 timestamp, u32 device_timestamp, 1300 struct ieee802_11_elems *elems, 1301 bool beacon) 1302 { 1303 struct ieee80211_local *local = sdata->local; 1304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1305 struct cfg80211_bss *cbss = ifmgd->associated; 1306 struct ieee80211_chanctx_conf *conf; 1307 struct ieee80211_chanctx *chanctx; 1308 enum nl80211_band current_band; 1309 struct ieee80211_csa_ie csa_ie; 1310 struct ieee80211_channel_switch ch_switch; 1311 struct ieee80211_bss *bss; 1312 int res; 1313 1314 sdata_assert_lock(sdata); 1315 1316 if (!cbss) 1317 return; 1318 1319 if (local->scanning) 1320 return; 1321 1322 current_band = cbss->channel->band; 1323 bss = (void *)cbss->priv; 1324 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1325 bss->vht_cap_info, 1326 ifmgd->flags, 1327 ifmgd->associated->bssid, &csa_ie); 1328 1329 if (!res) { 1330 ch_switch.timestamp = timestamp; 1331 ch_switch.device_timestamp = device_timestamp; 1332 ch_switch.block_tx = csa_ie.mode; 1333 ch_switch.chandef = csa_ie.chandef; 1334 ch_switch.count = csa_ie.count; 1335 ch_switch.delay = csa_ie.max_switch_time; 1336 } 1337 1338 if (res < 0) 1339 goto lock_and_drop_connection; 1340 1341 if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) { 1342 if (res) 1343 ieee80211_sta_abort_chanswitch(sdata); 1344 else 1345 drv_channel_switch_rx_beacon(sdata, &ch_switch); 1346 return; 1347 } else if (sdata->vif.csa_active || res) { 1348 /* disregard subsequent announcements if already processing */ 1349 return; 1350 } 1351 1352 if (sdata->vif.bss_conf.chandef.chan->band != 1353 csa_ie.chandef.chan->band) { 1354 sdata_info(sdata, 1355 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1356 ifmgd->associated->bssid, 1357 csa_ie.chandef.chan->center_freq, 1358 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1359 csa_ie.chandef.center_freq2); 1360 goto lock_and_drop_connection; 1361 } 1362 1363 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1364 IEEE80211_CHAN_DISABLED)) { 1365 sdata_info(sdata, 1366 "AP %pM switches to unsupported channel " 1367 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 1368 "disconnecting\n", 1369 ifmgd->associated->bssid, 1370 csa_ie.chandef.chan->center_freq, 1371 csa_ie.chandef.chan->freq_offset, 1372 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1373 csa_ie.chandef.freq1_offset, 1374 csa_ie.chandef.center_freq2); 1375 goto lock_and_drop_connection; 1376 } 1377 1378 if (cfg80211_chandef_identical(&csa_ie.chandef, 1379 &sdata->vif.bss_conf.chandef) && 1380 (!csa_ie.mode || !beacon)) { 1381 if (ifmgd->csa_ignored_same_chan) 1382 return; 1383 sdata_info(sdata, 1384 "AP %pM tries to chanswitch to same channel, ignore\n", 1385 ifmgd->associated->bssid); 1386 ifmgd->csa_ignored_same_chan = true; 1387 return; 1388 } 1389 1390 /* 1391 * Drop all TDLS peers - either we disconnect or move to a different 1392 * channel from this point on. There's no telling what our peer will do. 1393 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1394 * have an incompatible wider chandef. 1395 */ 1396 ieee80211_teardown_tdls_peers(sdata); 1397 1398 mutex_lock(&local->mtx); 1399 mutex_lock(&local->chanctx_mtx); 1400 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1401 lockdep_is_held(&local->chanctx_mtx)); 1402 if (!conf) { 1403 sdata_info(sdata, 1404 "no channel context assigned to vif?, disconnecting\n"); 1405 goto drop_connection; 1406 } 1407 1408 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1409 1410 if (local->use_chanctx && 1411 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1412 sdata_info(sdata, 1413 "driver doesn't support chan-switch with channel contexts\n"); 1414 goto drop_connection; 1415 } 1416 1417 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1418 sdata_info(sdata, 1419 "preparing for channel switch failed, disconnecting\n"); 1420 goto drop_connection; 1421 } 1422 1423 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1424 chanctx->mode, false); 1425 if (res) { 1426 sdata_info(sdata, 1427 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1428 res); 1429 goto drop_connection; 1430 } 1431 mutex_unlock(&local->chanctx_mtx); 1432 1433 sdata->vif.csa_active = true; 1434 sdata->csa_chandef = csa_ie.chandef; 1435 sdata->csa_block_tx = csa_ie.mode; 1436 ifmgd->csa_ignored_same_chan = false; 1437 ifmgd->beacon_crc_valid = false; 1438 1439 if (sdata->csa_block_tx) 1440 ieee80211_stop_vif_queues(local, sdata, 1441 IEEE80211_QUEUE_STOP_REASON_CSA); 1442 mutex_unlock(&local->mtx); 1443 1444 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1445 csa_ie.count, csa_ie.mode); 1446 1447 if (local->ops->channel_switch) { 1448 /* use driver's channel switch callback */ 1449 drv_channel_switch(local, sdata, &ch_switch); 1450 return; 1451 } 1452 1453 /* channel switch handled in software */ 1454 if (csa_ie.count <= 1) 1455 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1456 else 1457 mod_timer(&ifmgd->chswitch_timer, 1458 TU_TO_EXP_TIME((csa_ie.count - 1) * 1459 cbss->beacon_interval)); 1460 return; 1461 lock_and_drop_connection: 1462 mutex_lock(&local->mtx); 1463 mutex_lock(&local->chanctx_mtx); 1464 drop_connection: 1465 /* 1466 * This is just so that the disconnect flow will know that 1467 * we were trying to switch channel and failed. In case the 1468 * mode is 1 (we are not allowed to Tx), we will know not to 1469 * send a deauthentication frame. Those two fields will be 1470 * reset when the disconnection worker runs. 1471 */ 1472 sdata->vif.csa_active = true; 1473 sdata->csa_block_tx = csa_ie.mode; 1474 1475 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1476 mutex_unlock(&local->chanctx_mtx); 1477 mutex_unlock(&local->mtx); 1478 } 1479 1480 static bool 1481 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1482 struct ieee80211_channel *channel, 1483 const u8 *country_ie, u8 country_ie_len, 1484 const u8 *pwr_constr_elem, 1485 int *chan_pwr, int *pwr_reduction) 1486 { 1487 struct ieee80211_country_ie_triplet *triplet; 1488 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1489 int i, chan_increment; 1490 bool have_chan_pwr = false; 1491 1492 /* Invalid IE */ 1493 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1494 return false; 1495 1496 triplet = (void *)(country_ie + 3); 1497 country_ie_len -= 3; 1498 1499 switch (channel->band) { 1500 default: 1501 WARN_ON_ONCE(1); 1502 fallthrough; 1503 case NL80211_BAND_2GHZ: 1504 case NL80211_BAND_60GHZ: 1505 case NL80211_BAND_LC: 1506 chan_increment = 1; 1507 break; 1508 case NL80211_BAND_5GHZ: 1509 chan_increment = 4; 1510 break; 1511 case NL80211_BAND_6GHZ: 1512 /* 1513 * In the 6 GHz band, the "maximum transmit power level" 1514 * field in the triplets is reserved, and thus will be 1515 * zero and we shouldn't use it to control TX power. 1516 * The actual TX power will be given in the transmit 1517 * power envelope element instead. 1518 */ 1519 return false; 1520 } 1521 1522 /* find channel */ 1523 while (country_ie_len >= 3) { 1524 u8 first_channel = triplet->chans.first_channel; 1525 1526 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1527 goto next; 1528 1529 for (i = 0; i < triplet->chans.num_channels; i++) { 1530 if (first_channel + i * chan_increment == chan) { 1531 have_chan_pwr = true; 1532 *chan_pwr = triplet->chans.max_power; 1533 break; 1534 } 1535 } 1536 if (have_chan_pwr) 1537 break; 1538 1539 next: 1540 triplet++; 1541 country_ie_len -= 3; 1542 } 1543 1544 if (have_chan_pwr && pwr_constr_elem) 1545 *pwr_reduction = *pwr_constr_elem; 1546 else 1547 *pwr_reduction = 0; 1548 1549 return have_chan_pwr; 1550 } 1551 1552 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1553 struct ieee80211_channel *channel, 1554 const u8 *cisco_dtpc_ie, 1555 int *pwr_level) 1556 { 1557 /* From practical testing, the first data byte of the DTPC element 1558 * seems to contain the requested dBm level, and the CLI on Cisco 1559 * APs clearly state the range is -127 to 127 dBm, which indicates 1560 * a signed byte, although it seemingly never actually goes negative. 1561 * The other byte seems to always be zero. 1562 */ 1563 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1564 } 1565 1566 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1567 struct ieee80211_channel *channel, 1568 struct ieee80211_mgmt *mgmt, 1569 const u8 *country_ie, u8 country_ie_len, 1570 const u8 *pwr_constr_ie, 1571 const u8 *cisco_dtpc_ie) 1572 { 1573 bool has_80211h_pwr = false, has_cisco_pwr = false; 1574 int chan_pwr = 0, pwr_reduction_80211h = 0; 1575 int pwr_level_cisco, pwr_level_80211h; 1576 int new_ap_level; 1577 __le16 capab = mgmt->u.probe_resp.capab_info; 1578 1579 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 1580 return 0; /* TODO */ 1581 1582 if (country_ie && 1583 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1584 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1585 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1586 sdata, channel, country_ie, country_ie_len, 1587 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1588 pwr_level_80211h = 1589 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1590 } 1591 1592 if (cisco_dtpc_ie) { 1593 ieee80211_find_cisco_dtpc( 1594 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1595 has_cisco_pwr = true; 1596 } 1597 1598 if (!has_80211h_pwr && !has_cisco_pwr) 1599 return 0; 1600 1601 /* If we have both 802.11h and Cisco DTPC, apply both limits 1602 * by picking the smallest of the two power levels advertised. 1603 */ 1604 if (has_80211h_pwr && 1605 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1606 new_ap_level = pwr_level_80211h; 1607 1608 if (sdata->ap_power_level == new_ap_level) 1609 return 0; 1610 1611 sdata_dbg(sdata, 1612 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1613 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1614 sdata->u.mgd.bssid); 1615 } else { /* has_cisco_pwr is always true here. */ 1616 new_ap_level = pwr_level_cisco; 1617 1618 if (sdata->ap_power_level == new_ap_level) 1619 return 0; 1620 1621 sdata_dbg(sdata, 1622 "Limiting TX power to %d dBm as advertised by %pM\n", 1623 pwr_level_cisco, sdata->u.mgd.bssid); 1624 } 1625 1626 sdata->ap_power_level = new_ap_level; 1627 if (__ieee80211_recalc_txpower(sdata)) 1628 return BSS_CHANGED_TXPOWER; 1629 return 0; 1630 } 1631 1632 /* powersave */ 1633 static void ieee80211_enable_ps(struct ieee80211_local *local, 1634 struct ieee80211_sub_if_data *sdata) 1635 { 1636 struct ieee80211_conf *conf = &local->hw.conf; 1637 1638 /* 1639 * If we are scanning right now then the parameters will 1640 * take effect when scan finishes. 1641 */ 1642 if (local->scanning) 1643 return; 1644 1645 if (conf->dynamic_ps_timeout > 0 && 1646 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1647 mod_timer(&local->dynamic_ps_timer, jiffies + 1648 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1649 } else { 1650 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1651 ieee80211_send_nullfunc(local, sdata, true); 1652 1653 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1654 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1655 return; 1656 1657 conf->flags |= IEEE80211_CONF_PS; 1658 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1659 } 1660 } 1661 1662 static void ieee80211_change_ps(struct ieee80211_local *local) 1663 { 1664 struct ieee80211_conf *conf = &local->hw.conf; 1665 1666 if (local->ps_sdata) { 1667 ieee80211_enable_ps(local, local->ps_sdata); 1668 } else if (conf->flags & IEEE80211_CONF_PS) { 1669 conf->flags &= ~IEEE80211_CONF_PS; 1670 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1671 del_timer_sync(&local->dynamic_ps_timer); 1672 cancel_work_sync(&local->dynamic_ps_enable_work); 1673 } 1674 } 1675 1676 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1677 { 1678 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1679 struct sta_info *sta = NULL; 1680 bool authorized = false; 1681 1682 if (!mgd->powersave) 1683 return false; 1684 1685 if (mgd->broken_ap) 1686 return false; 1687 1688 if (!mgd->associated) 1689 return false; 1690 1691 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1692 return false; 1693 1694 if (!mgd->have_beacon) 1695 return false; 1696 1697 rcu_read_lock(); 1698 sta = sta_info_get(sdata, mgd->bssid); 1699 if (sta) 1700 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1701 rcu_read_unlock(); 1702 1703 return authorized; 1704 } 1705 1706 /* need to hold RTNL or interface lock */ 1707 void ieee80211_recalc_ps(struct ieee80211_local *local) 1708 { 1709 struct ieee80211_sub_if_data *sdata, *found = NULL; 1710 int count = 0; 1711 int timeout; 1712 1713 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1714 local->ps_sdata = NULL; 1715 return; 1716 } 1717 1718 list_for_each_entry(sdata, &local->interfaces, list) { 1719 if (!ieee80211_sdata_running(sdata)) 1720 continue; 1721 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1722 /* If an AP vif is found, then disable PS 1723 * by setting the count to zero thereby setting 1724 * ps_sdata to NULL. 1725 */ 1726 count = 0; 1727 break; 1728 } 1729 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1730 continue; 1731 found = sdata; 1732 count++; 1733 } 1734 1735 if (count == 1 && ieee80211_powersave_allowed(found)) { 1736 u8 dtimper = found->u.mgd.dtim_period; 1737 1738 timeout = local->dynamic_ps_forced_timeout; 1739 if (timeout < 0) 1740 timeout = 100; 1741 local->hw.conf.dynamic_ps_timeout = timeout; 1742 1743 /* If the TIM IE is invalid, pretend the value is 1 */ 1744 if (!dtimper) 1745 dtimper = 1; 1746 1747 local->hw.conf.ps_dtim_period = dtimper; 1748 local->ps_sdata = found; 1749 } else { 1750 local->ps_sdata = NULL; 1751 } 1752 1753 ieee80211_change_ps(local); 1754 } 1755 1756 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1757 { 1758 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1759 1760 if (sdata->vif.bss_conf.ps != ps_allowed) { 1761 sdata->vif.bss_conf.ps = ps_allowed; 1762 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1763 } 1764 } 1765 1766 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1767 { 1768 struct ieee80211_local *local = 1769 container_of(work, struct ieee80211_local, 1770 dynamic_ps_disable_work); 1771 1772 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1773 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1774 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1775 } 1776 1777 ieee80211_wake_queues_by_reason(&local->hw, 1778 IEEE80211_MAX_QUEUE_MAP, 1779 IEEE80211_QUEUE_STOP_REASON_PS, 1780 false); 1781 } 1782 1783 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1784 { 1785 struct ieee80211_local *local = 1786 container_of(work, struct ieee80211_local, 1787 dynamic_ps_enable_work); 1788 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1789 struct ieee80211_if_managed *ifmgd; 1790 unsigned long flags; 1791 int q; 1792 1793 /* can only happen when PS was just disabled anyway */ 1794 if (!sdata) 1795 return; 1796 1797 ifmgd = &sdata->u.mgd; 1798 1799 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1800 return; 1801 1802 if (local->hw.conf.dynamic_ps_timeout > 0) { 1803 /* don't enter PS if TX frames are pending */ 1804 if (drv_tx_frames_pending(local)) { 1805 mod_timer(&local->dynamic_ps_timer, jiffies + 1806 msecs_to_jiffies( 1807 local->hw.conf.dynamic_ps_timeout)); 1808 return; 1809 } 1810 1811 /* 1812 * transmission can be stopped by others which leads to 1813 * dynamic_ps_timer expiry. Postpone the ps timer if it 1814 * is not the actual idle state. 1815 */ 1816 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1817 for (q = 0; q < local->hw.queues; q++) { 1818 if (local->queue_stop_reasons[q]) { 1819 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1820 flags); 1821 mod_timer(&local->dynamic_ps_timer, jiffies + 1822 msecs_to_jiffies( 1823 local->hw.conf.dynamic_ps_timeout)); 1824 return; 1825 } 1826 } 1827 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1828 } 1829 1830 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1831 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1832 if (drv_tx_frames_pending(local)) { 1833 mod_timer(&local->dynamic_ps_timer, jiffies + 1834 msecs_to_jiffies( 1835 local->hw.conf.dynamic_ps_timeout)); 1836 } else { 1837 ieee80211_send_nullfunc(local, sdata, true); 1838 /* Flush to get the tx status of nullfunc frame */ 1839 ieee80211_flush_queues(local, sdata, false); 1840 } 1841 } 1842 1843 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1844 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1845 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1846 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1847 local->hw.conf.flags |= IEEE80211_CONF_PS; 1848 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1849 } 1850 } 1851 1852 void ieee80211_dynamic_ps_timer(struct timer_list *t) 1853 { 1854 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 1855 1856 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1857 } 1858 1859 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1860 { 1861 struct delayed_work *delayed_work = to_delayed_work(work); 1862 struct ieee80211_sub_if_data *sdata = 1863 container_of(delayed_work, struct ieee80211_sub_if_data, 1864 dfs_cac_timer_work); 1865 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1866 1867 mutex_lock(&sdata->local->mtx); 1868 if (sdata->wdev.cac_started) { 1869 ieee80211_vif_release_channel(sdata); 1870 cfg80211_cac_event(sdata->dev, &chandef, 1871 NL80211_RADAR_CAC_FINISHED, 1872 GFP_KERNEL); 1873 } 1874 mutex_unlock(&sdata->local->mtx); 1875 } 1876 1877 static bool 1878 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1879 { 1880 struct ieee80211_local *local = sdata->local; 1881 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1882 bool ret = false; 1883 int ac; 1884 1885 if (local->hw.queues < IEEE80211_NUM_ACS) 1886 return false; 1887 1888 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1889 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1890 int non_acm_ac; 1891 unsigned long now = jiffies; 1892 1893 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1894 tx_tspec->admitted_time && 1895 time_after(now, tx_tspec->time_slice_start + HZ)) { 1896 tx_tspec->consumed_tx_time = 0; 1897 tx_tspec->time_slice_start = now; 1898 1899 if (tx_tspec->downgraded) 1900 tx_tspec->action = 1901 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1902 } 1903 1904 switch (tx_tspec->action) { 1905 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1906 /* take the original parameters */ 1907 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1908 sdata_err(sdata, 1909 "failed to set TX queue parameters for queue %d\n", 1910 ac); 1911 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1912 tx_tspec->downgraded = false; 1913 ret = true; 1914 break; 1915 case TX_TSPEC_ACTION_DOWNGRADE: 1916 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1917 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1918 ret = true; 1919 break; 1920 } 1921 /* downgrade next lower non-ACM AC */ 1922 for (non_acm_ac = ac + 1; 1923 non_acm_ac < IEEE80211_NUM_ACS; 1924 non_acm_ac++) 1925 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1926 break; 1927 /* Usually the loop will result in using BK even if it 1928 * requires admission control, but such a configuration 1929 * makes no sense and we have to transmit somehow - the 1930 * AC selection does the same thing. 1931 * If we started out trying to downgrade from BK, then 1932 * the extra condition here might be needed. 1933 */ 1934 if (non_acm_ac >= IEEE80211_NUM_ACS) 1935 non_acm_ac = IEEE80211_AC_BK; 1936 if (drv_conf_tx(local, sdata, ac, 1937 &sdata->tx_conf[non_acm_ac])) 1938 sdata_err(sdata, 1939 "failed to set TX queue parameters for queue %d\n", 1940 ac); 1941 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1942 ret = true; 1943 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1944 tx_tspec->time_slice_start + HZ - now + 1); 1945 break; 1946 case TX_TSPEC_ACTION_NONE: 1947 /* nothing now */ 1948 break; 1949 } 1950 } 1951 1952 return ret; 1953 } 1954 1955 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1956 { 1957 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1958 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1959 } 1960 1961 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1962 { 1963 struct ieee80211_sub_if_data *sdata; 1964 1965 sdata = container_of(work, struct ieee80211_sub_if_data, 1966 u.mgd.tx_tspec_wk.work); 1967 ieee80211_sta_handle_tspec_ac_params(sdata); 1968 } 1969 1970 /* MLME */ 1971 static bool 1972 ieee80211_sta_wmm_params(struct ieee80211_local *local, 1973 struct ieee80211_sub_if_data *sdata, 1974 const u8 *wmm_param, size_t wmm_param_len, 1975 const struct ieee80211_mu_edca_param_set *mu_edca) 1976 { 1977 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1979 size_t left; 1980 int count, mu_edca_count, ac; 1981 const u8 *pos; 1982 u8 uapsd_queues = 0; 1983 1984 if (!local->ops->conf_tx) 1985 return false; 1986 1987 if (local->hw.queues < IEEE80211_NUM_ACS) 1988 return false; 1989 1990 if (!wmm_param) 1991 return false; 1992 1993 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1994 return false; 1995 1996 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1997 uapsd_queues = ifmgd->uapsd_queues; 1998 1999 count = wmm_param[6] & 0x0f; 2000 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2001 * if mu_edca was preset before and now it disappeared tell 2002 * the driver about it. 2003 */ 2004 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2005 if (count == ifmgd->wmm_last_param_set && 2006 mu_edca_count == ifmgd->mu_edca_last_param_set) 2007 return false; 2008 ifmgd->wmm_last_param_set = count; 2009 ifmgd->mu_edca_last_param_set = mu_edca_count; 2010 2011 pos = wmm_param + 8; 2012 left = wmm_param_len - 8; 2013 2014 memset(¶ms, 0, sizeof(params)); 2015 2016 sdata->wmm_acm = 0; 2017 for (; left >= 4; left -= 4, pos += 4) { 2018 int aci = (pos[0] >> 5) & 0x03; 2019 int acm = (pos[0] >> 4) & 0x01; 2020 bool uapsd = false; 2021 2022 switch (aci) { 2023 case 1: /* AC_BK */ 2024 ac = IEEE80211_AC_BK; 2025 if (acm) 2026 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2027 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2028 uapsd = true; 2029 params[ac].mu_edca = !!mu_edca; 2030 if (mu_edca) 2031 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2032 break; 2033 case 2: /* AC_VI */ 2034 ac = IEEE80211_AC_VI; 2035 if (acm) 2036 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2037 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2038 uapsd = true; 2039 params[ac].mu_edca = !!mu_edca; 2040 if (mu_edca) 2041 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2042 break; 2043 case 3: /* AC_VO */ 2044 ac = IEEE80211_AC_VO; 2045 if (acm) 2046 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2047 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2048 uapsd = true; 2049 params[ac].mu_edca = !!mu_edca; 2050 if (mu_edca) 2051 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2052 break; 2053 case 0: /* AC_BE */ 2054 default: 2055 ac = IEEE80211_AC_BE; 2056 if (acm) 2057 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2058 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2059 uapsd = true; 2060 params[ac].mu_edca = !!mu_edca; 2061 if (mu_edca) 2062 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2063 break; 2064 } 2065 2066 params[ac].aifs = pos[0] & 0x0f; 2067 2068 if (params[ac].aifs < 2) { 2069 sdata_info(sdata, 2070 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2071 params[ac].aifs, aci); 2072 params[ac].aifs = 2; 2073 } 2074 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2075 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2076 params[ac].txop = get_unaligned_le16(pos + 2); 2077 params[ac].acm = acm; 2078 params[ac].uapsd = uapsd; 2079 2080 if (params[ac].cw_min == 0 || 2081 params[ac].cw_min > params[ac].cw_max) { 2082 sdata_info(sdata, 2083 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2084 params[ac].cw_min, params[ac].cw_max, aci); 2085 return false; 2086 } 2087 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2088 } 2089 2090 /* WMM specification requires all 4 ACIs. */ 2091 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2092 if (params[ac].cw_min == 0) { 2093 sdata_info(sdata, 2094 "AP has invalid WMM params (missing AC %d), using defaults\n", 2095 ac); 2096 return false; 2097 } 2098 } 2099 2100 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2101 mlme_dbg(sdata, 2102 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2103 ac, params[ac].acm, 2104 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2105 params[ac].txop, params[ac].uapsd, 2106 ifmgd->tx_tspec[ac].downgraded); 2107 sdata->tx_conf[ac] = params[ac]; 2108 if (!ifmgd->tx_tspec[ac].downgraded && 2109 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 2110 sdata_err(sdata, 2111 "failed to set TX queue parameters for AC %d\n", 2112 ac); 2113 } 2114 2115 /* enable WMM or activate new settings */ 2116 sdata->vif.bss_conf.qos = true; 2117 return true; 2118 } 2119 2120 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2121 { 2122 lockdep_assert_held(&sdata->local->mtx); 2123 2124 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2125 ieee80211_run_deferred_scan(sdata->local); 2126 } 2127 2128 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2129 { 2130 mutex_lock(&sdata->local->mtx); 2131 __ieee80211_stop_poll(sdata); 2132 mutex_unlock(&sdata->local->mtx); 2133 } 2134 2135 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 2136 u16 capab, bool erp_valid, u8 erp) 2137 { 2138 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2139 struct ieee80211_supported_band *sband; 2140 u32 changed = 0; 2141 bool use_protection; 2142 bool use_short_preamble; 2143 bool use_short_slot; 2144 2145 sband = ieee80211_get_sband(sdata); 2146 if (!sband) 2147 return changed; 2148 2149 if (erp_valid) { 2150 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2151 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2152 } else { 2153 use_protection = false; 2154 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2155 } 2156 2157 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2158 if (sband->band == NL80211_BAND_5GHZ || 2159 sband->band == NL80211_BAND_6GHZ) 2160 use_short_slot = true; 2161 2162 if (use_protection != bss_conf->use_cts_prot) { 2163 bss_conf->use_cts_prot = use_protection; 2164 changed |= BSS_CHANGED_ERP_CTS_PROT; 2165 } 2166 2167 if (use_short_preamble != bss_conf->use_short_preamble) { 2168 bss_conf->use_short_preamble = use_short_preamble; 2169 changed |= BSS_CHANGED_ERP_PREAMBLE; 2170 } 2171 2172 if (use_short_slot != bss_conf->use_short_slot) { 2173 bss_conf->use_short_slot = use_short_slot; 2174 changed |= BSS_CHANGED_ERP_SLOT; 2175 } 2176 2177 return changed; 2178 } 2179 2180 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2181 struct cfg80211_bss *cbss, 2182 u32 bss_info_changed) 2183 { 2184 struct ieee80211_bss *bss = (void *)cbss->priv; 2185 struct ieee80211_local *local = sdata->local; 2186 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2187 2188 bss_info_changed |= BSS_CHANGED_ASSOC; 2189 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 2190 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 2191 2192 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 2193 beacon_loss_count * bss_conf->beacon_int)); 2194 2195 sdata->u.mgd.associated = cbss; 2196 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2197 2198 ieee80211_check_rate_mask(sdata); 2199 2200 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 2201 2202 if (sdata->vif.p2p || 2203 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2204 const struct cfg80211_bss_ies *ies; 2205 2206 rcu_read_lock(); 2207 ies = rcu_dereference(cbss->ies); 2208 if (ies) { 2209 int ret; 2210 2211 ret = cfg80211_get_p2p_attr( 2212 ies->data, ies->len, 2213 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2214 (u8 *) &bss_conf->p2p_noa_attr, 2215 sizeof(bss_conf->p2p_noa_attr)); 2216 if (ret >= 2) { 2217 sdata->u.mgd.p2p_noa_index = 2218 bss_conf->p2p_noa_attr.index; 2219 bss_info_changed |= BSS_CHANGED_P2P_PS; 2220 } 2221 } 2222 rcu_read_unlock(); 2223 } 2224 2225 /* just to be sure */ 2226 ieee80211_stop_poll(sdata); 2227 2228 ieee80211_led_assoc(local, 1); 2229 2230 if (sdata->u.mgd.have_beacon) { 2231 /* 2232 * If the AP is buggy we may get here with no DTIM period 2233 * known, so assume it's 1 which is the only safe assumption 2234 * in that case, although if the TIM IE is broken powersave 2235 * probably just won't work at all. 2236 */ 2237 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 2238 bss_conf->beacon_rate = bss->beacon_rate; 2239 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 2240 } else { 2241 bss_conf->beacon_rate = NULL; 2242 bss_conf->dtim_period = 0; 2243 } 2244 2245 bss_conf->assoc = 1; 2246 2247 /* Tell the driver to monitor connection quality (if supported) */ 2248 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2249 bss_conf->cqm_rssi_thold) 2250 bss_info_changed |= BSS_CHANGED_CQM; 2251 2252 /* Enable ARP filtering */ 2253 if (bss_conf->arp_addr_cnt) 2254 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 2255 2256 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 2257 2258 mutex_lock(&local->iflist_mtx); 2259 ieee80211_recalc_ps(local); 2260 mutex_unlock(&local->iflist_mtx); 2261 2262 ieee80211_recalc_smps(sdata); 2263 ieee80211_recalc_ps_vif(sdata); 2264 2265 netif_carrier_on(sdata->dev); 2266 } 2267 2268 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 2269 u16 stype, u16 reason, bool tx, 2270 u8 *frame_buf) 2271 { 2272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2273 struct ieee80211_local *local = sdata->local; 2274 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2275 u32 changed = 0; 2276 struct ieee80211_prep_tx_info info = { 2277 .subtype = stype, 2278 }; 2279 2280 sdata_assert_lock(sdata); 2281 2282 if (WARN_ON_ONCE(tx && !frame_buf)) 2283 return; 2284 2285 if (WARN_ON(!ifmgd->associated)) 2286 return; 2287 2288 ieee80211_stop_poll(sdata); 2289 2290 ifmgd->associated = NULL; 2291 netif_carrier_off(sdata->dev); 2292 2293 /* 2294 * if we want to get out of ps before disassoc (why?) we have 2295 * to do it before sending disassoc, as otherwise the null-packet 2296 * won't be valid. 2297 */ 2298 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2299 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2300 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2301 } 2302 local->ps_sdata = NULL; 2303 2304 /* disable per-vif ps */ 2305 ieee80211_recalc_ps_vif(sdata); 2306 2307 /* make sure ongoing transmission finishes */ 2308 synchronize_net(); 2309 2310 /* 2311 * drop any frame before deauth/disassoc, this can be data or 2312 * management frame. Since we are disconnecting, we should not 2313 * insist sending these frames which can take time and delay 2314 * the disconnection and possible the roaming. 2315 */ 2316 if (tx) 2317 ieee80211_flush_queues(local, sdata, true); 2318 2319 /* deauthenticate/disassociate now */ 2320 if (tx || frame_buf) { 2321 /* 2322 * In multi channel scenarios guarantee that the virtual 2323 * interface is granted immediate airtime to transmit the 2324 * deauthentication frame by calling mgd_prepare_tx, if the 2325 * driver requested so. 2326 */ 2327 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP) && 2328 !ifmgd->have_beacon) { 2329 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2330 } 2331 2332 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, 2333 ifmgd->bssid, stype, reason, 2334 tx, frame_buf); 2335 } 2336 2337 /* flush out frame - make sure the deauth was actually sent */ 2338 if (tx) 2339 ieee80211_flush_queues(local, sdata, false); 2340 2341 drv_mgd_complete_tx(sdata->local, sdata, &info); 2342 2343 /* clear bssid only after building the needed mgmt frames */ 2344 eth_zero_addr(ifmgd->bssid); 2345 2346 sdata->vif.bss_conf.ssid_len = 0; 2347 2348 /* remove AP and TDLS peers */ 2349 sta_info_flush(sdata); 2350 2351 /* finally reset all BSS / config parameters */ 2352 changed |= ieee80211_reset_erp_info(sdata); 2353 2354 ieee80211_led_assoc(local, 0); 2355 changed |= BSS_CHANGED_ASSOC; 2356 sdata->vif.bss_conf.assoc = false; 2357 2358 ifmgd->p2p_noa_index = -1; 2359 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2360 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2361 2362 /* on the next assoc, re-program HT/VHT parameters */ 2363 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2364 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2365 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2366 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2367 2368 /* reset MU-MIMO ownership and group data */ 2369 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2370 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2371 memset(sdata->vif.bss_conf.mu_group.position, 0, 2372 sizeof(sdata->vif.bss_conf.mu_group.position)); 2373 changed |= BSS_CHANGED_MU_GROUPS; 2374 sdata->vif.mu_mimo_owner = false; 2375 2376 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2377 2378 del_timer_sync(&local->dynamic_ps_timer); 2379 cancel_work_sync(&local->dynamic_ps_enable_work); 2380 2381 /* Disable ARP filtering */ 2382 if (sdata->vif.bss_conf.arp_addr_cnt) 2383 changed |= BSS_CHANGED_ARP_FILTER; 2384 2385 sdata->vif.bss_conf.qos = false; 2386 changed |= BSS_CHANGED_QOS; 2387 2388 /* The BSSID (not really interesting) and HT changed */ 2389 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2390 ieee80211_bss_info_change_notify(sdata, changed); 2391 2392 /* disassociated - set to defaults now */ 2393 ieee80211_set_wmm_default(sdata, false, false); 2394 2395 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2396 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2397 del_timer_sync(&sdata->u.mgd.timer); 2398 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2399 2400 sdata->vif.bss_conf.dtim_period = 0; 2401 sdata->vif.bss_conf.beacon_rate = NULL; 2402 2403 ifmgd->have_beacon = false; 2404 2405 ifmgd->flags = 0; 2406 mutex_lock(&local->mtx); 2407 ieee80211_vif_release_channel(sdata); 2408 2409 sdata->vif.csa_active = false; 2410 ifmgd->csa_waiting_bcn = false; 2411 ifmgd->csa_ignored_same_chan = false; 2412 if (sdata->csa_block_tx) { 2413 ieee80211_wake_vif_queues(local, sdata, 2414 IEEE80211_QUEUE_STOP_REASON_CSA); 2415 sdata->csa_block_tx = false; 2416 } 2417 mutex_unlock(&local->mtx); 2418 2419 /* existing TX TSPEC sessions no longer exist */ 2420 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2421 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2422 2423 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2424 2425 bss_conf->pwr_reduction = 0; 2426 bss_conf->tx_pwr_env_num = 0; 2427 memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env)); 2428 } 2429 2430 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2431 { 2432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2433 struct ieee80211_local *local = sdata->local; 2434 2435 mutex_lock(&local->mtx); 2436 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2437 goto out; 2438 2439 __ieee80211_stop_poll(sdata); 2440 2441 mutex_lock(&local->iflist_mtx); 2442 ieee80211_recalc_ps(local); 2443 mutex_unlock(&local->iflist_mtx); 2444 2445 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2446 goto out; 2447 2448 /* 2449 * We've received a probe response, but are not sure whether 2450 * we have or will be receiving any beacons or data, so let's 2451 * schedule the timers again, just in case. 2452 */ 2453 ieee80211_sta_reset_beacon_monitor(sdata); 2454 2455 mod_timer(&ifmgd->conn_mon_timer, 2456 round_jiffies_up(jiffies + 2457 IEEE80211_CONNECTION_IDLE_TIME)); 2458 out: 2459 mutex_unlock(&local->mtx); 2460 } 2461 2462 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2463 struct ieee80211_hdr *hdr, 2464 u16 tx_time) 2465 { 2466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2467 u16 tid; 2468 int ac; 2469 struct ieee80211_sta_tx_tspec *tx_tspec; 2470 unsigned long now = jiffies; 2471 2472 if (!ieee80211_is_data_qos(hdr->frame_control)) 2473 return; 2474 2475 tid = ieee80211_get_tid(hdr); 2476 ac = ieee80211_ac_from_tid(tid); 2477 tx_tspec = &ifmgd->tx_tspec[ac]; 2478 2479 if (likely(!tx_tspec->admitted_time)) 2480 return; 2481 2482 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2483 tx_tspec->consumed_tx_time = 0; 2484 tx_tspec->time_slice_start = now; 2485 2486 if (tx_tspec->downgraded) { 2487 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2488 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2489 } 2490 } 2491 2492 if (tx_tspec->downgraded) 2493 return; 2494 2495 tx_tspec->consumed_tx_time += tx_time; 2496 2497 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2498 tx_tspec->downgraded = true; 2499 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2500 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2501 } 2502 } 2503 2504 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2505 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2506 { 2507 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2508 2509 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 2510 !sdata->u.mgd.probe_send_count) 2511 return; 2512 2513 if (ack) 2514 sdata->u.mgd.probe_send_count = 0; 2515 else 2516 sdata->u.mgd.nullfunc_failed = true; 2517 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2518 } 2519 2520 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 2521 const u8 *src, const u8 *dst, 2522 const u8 *ssid, size_t ssid_len, 2523 struct ieee80211_channel *channel) 2524 { 2525 struct sk_buff *skb; 2526 2527 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 2528 ssid, ssid_len, NULL, 0, 2529 IEEE80211_PROBE_FLAG_DIRECTED); 2530 if (skb) 2531 ieee80211_tx_skb(sdata, skb); 2532 } 2533 2534 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2535 { 2536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2537 const struct element *ssid; 2538 u8 *dst = ifmgd->associated->bssid; 2539 u8 unicast_limit = max(1, max_probe_tries - 3); 2540 struct sta_info *sta; 2541 2542 /* 2543 * Try sending broadcast probe requests for the last three 2544 * probe requests after the first ones failed since some 2545 * buggy APs only support broadcast probe requests. 2546 */ 2547 if (ifmgd->probe_send_count >= unicast_limit) 2548 dst = NULL; 2549 2550 /* 2551 * When the hardware reports an accurate Tx ACK status, it's 2552 * better to send a nullfunc frame instead of a probe request, 2553 * as it will kick us off the AP quickly if we aren't associated 2554 * anymore. The timeout will be reset if the frame is ACKed by 2555 * the AP. 2556 */ 2557 ifmgd->probe_send_count++; 2558 2559 if (dst) { 2560 mutex_lock(&sdata->local->sta_mtx); 2561 sta = sta_info_get(sdata, dst); 2562 if (!WARN_ON(!sta)) 2563 ieee80211_check_fast_rx(sta); 2564 mutex_unlock(&sdata->local->sta_mtx); 2565 } 2566 2567 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2568 ifmgd->nullfunc_failed = false; 2569 ieee80211_send_nullfunc(sdata->local, sdata, false); 2570 } else { 2571 int ssid_len; 2572 2573 rcu_read_lock(); 2574 ssid = ieee80211_bss_get_elem(ifmgd->associated, WLAN_EID_SSID); 2575 if (WARN_ON_ONCE(ssid == NULL)) 2576 ssid_len = 0; 2577 else 2578 ssid_len = ssid->datalen; 2579 2580 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 2581 ssid->data, ssid_len, 2582 ifmgd->associated->channel); 2583 rcu_read_unlock(); 2584 } 2585 2586 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2587 run_again(sdata, ifmgd->probe_timeout); 2588 } 2589 2590 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2591 bool beacon) 2592 { 2593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2594 bool already = false; 2595 2596 if (!ieee80211_sdata_running(sdata)) 2597 return; 2598 2599 sdata_lock(sdata); 2600 2601 if (!ifmgd->associated) 2602 goto out; 2603 2604 mutex_lock(&sdata->local->mtx); 2605 2606 if (sdata->local->tmp_channel || sdata->local->scanning) { 2607 mutex_unlock(&sdata->local->mtx); 2608 goto out; 2609 } 2610 2611 if (sdata->local->suspending) { 2612 /* reschedule after resume */ 2613 mutex_unlock(&sdata->local->mtx); 2614 ieee80211_reset_ap_probe(sdata); 2615 goto out; 2616 } 2617 2618 if (beacon) { 2619 mlme_dbg_ratelimited(sdata, 2620 "detected beacon loss from AP (missed %d beacons) - probing\n", 2621 beacon_loss_count); 2622 2623 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2624 } 2625 2626 /* 2627 * The driver/our work has already reported this event or the 2628 * connection monitoring has kicked in and we have already sent 2629 * a probe request. Or maybe the AP died and the driver keeps 2630 * reporting until we disassociate... 2631 * 2632 * In either case we have to ignore the current call to this 2633 * function (except for setting the correct probe reason bit) 2634 * because otherwise we would reset the timer every time and 2635 * never check whether we received a probe response! 2636 */ 2637 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2638 already = true; 2639 2640 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2641 2642 mutex_unlock(&sdata->local->mtx); 2643 2644 if (already) 2645 goto out; 2646 2647 mutex_lock(&sdata->local->iflist_mtx); 2648 ieee80211_recalc_ps(sdata->local); 2649 mutex_unlock(&sdata->local->iflist_mtx); 2650 2651 ifmgd->probe_send_count = 0; 2652 ieee80211_mgd_probe_ap_send(sdata); 2653 out: 2654 sdata_unlock(sdata); 2655 } 2656 2657 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2658 struct ieee80211_vif *vif) 2659 { 2660 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2662 struct cfg80211_bss *cbss; 2663 struct sk_buff *skb; 2664 const struct element *ssid; 2665 int ssid_len; 2666 2667 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2668 return NULL; 2669 2670 sdata_assert_lock(sdata); 2671 2672 if (ifmgd->associated) 2673 cbss = ifmgd->associated; 2674 else if (ifmgd->auth_data) 2675 cbss = ifmgd->auth_data->bss; 2676 else if (ifmgd->assoc_data) 2677 cbss = ifmgd->assoc_data->bss; 2678 else 2679 return NULL; 2680 2681 rcu_read_lock(); 2682 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 2683 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 2684 "invalid SSID element (len=%d)", 2685 ssid ? ssid->datalen : -1)) 2686 ssid_len = 0; 2687 else 2688 ssid_len = ssid->datalen; 2689 2690 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2691 (u32) -1, cbss->channel, 2692 ssid->data, ssid_len, 2693 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 2694 rcu_read_unlock(); 2695 2696 return skb; 2697 } 2698 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2699 2700 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2701 const u8 *buf, size_t len, bool tx, 2702 u16 reason, bool reconnect) 2703 { 2704 struct ieee80211_event event = { 2705 .type = MLME_EVENT, 2706 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2707 .u.mlme.reason = reason, 2708 }; 2709 2710 if (tx) 2711 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 2712 else 2713 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2714 2715 drv_event_callback(sdata->local, sdata, &event); 2716 } 2717 2718 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2719 { 2720 struct ieee80211_local *local = sdata->local; 2721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2722 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2723 bool tx; 2724 2725 sdata_lock(sdata); 2726 if (!ifmgd->associated) { 2727 sdata_unlock(sdata); 2728 return; 2729 } 2730 2731 tx = !sdata->csa_block_tx; 2732 2733 if (!ifmgd->driver_disconnect) { 2734 /* 2735 * AP is probably out of range (or not reachable for another 2736 * reason) so remove the bss struct for that AP. 2737 */ 2738 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2739 } 2740 2741 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2742 ifmgd->driver_disconnect ? 2743 WLAN_REASON_DEAUTH_LEAVING : 2744 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2745 tx, frame_buf); 2746 mutex_lock(&local->mtx); 2747 sdata->vif.csa_active = false; 2748 ifmgd->csa_waiting_bcn = false; 2749 if (sdata->csa_block_tx) { 2750 ieee80211_wake_vif_queues(local, sdata, 2751 IEEE80211_QUEUE_STOP_REASON_CSA); 2752 sdata->csa_block_tx = false; 2753 } 2754 mutex_unlock(&local->mtx); 2755 2756 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 2757 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2758 ifmgd->reconnect); 2759 ifmgd->reconnect = false; 2760 2761 sdata_unlock(sdata); 2762 } 2763 2764 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2765 { 2766 struct ieee80211_sub_if_data *sdata = 2767 container_of(work, struct ieee80211_sub_if_data, 2768 u.mgd.beacon_connection_loss_work); 2769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2770 2771 if (ifmgd->associated) 2772 ifmgd->beacon_loss_count++; 2773 2774 if (ifmgd->connection_loss) { 2775 sdata_info(sdata, "Connection to AP %pM lost\n", 2776 ifmgd->bssid); 2777 __ieee80211_disconnect(sdata); 2778 ifmgd->connection_loss = false; 2779 } else if (ifmgd->driver_disconnect) { 2780 sdata_info(sdata, 2781 "Driver requested disconnection from AP %pM\n", 2782 ifmgd->bssid); 2783 __ieee80211_disconnect(sdata); 2784 ifmgd->driver_disconnect = false; 2785 } else { 2786 ieee80211_mgd_probe_ap(sdata, true); 2787 } 2788 } 2789 2790 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2791 { 2792 struct ieee80211_sub_if_data *sdata = 2793 container_of(work, struct ieee80211_sub_if_data, 2794 u.mgd.csa_connection_drop_work); 2795 2796 __ieee80211_disconnect(sdata); 2797 } 2798 2799 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2800 { 2801 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2802 struct ieee80211_hw *hw = &sdata->local->hw; 2803 2804 trace_api_beacon_loss(sdata); 2805 2806 sdata->u.mgd.connection_loss = false; 2807 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2808 } 2809 EXPORT_SYMBOL(ieee80211_beacon_loss); 2810 2811 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2812 { 2813 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2814 struct ieee80211_hw *hw = &sdata->local->hw; 2815 2816 trace_api_connection_loss(sdata); 2817 2818 sdata->u.mgd.connection_loss = true; 2819 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2820 } 2821 EXPORT_SYMBOL(ieee80211_connection_loss); 2822 2823 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 2824 { 2825 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2826 struct ieee80211_hw *hw = &sdata->local->hw; 2827 2828 trace_api_disconnect(sdata, reconnect); 2829 2830 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2831 return; 2832 2833 sdata->u.mgd.driver_disconnect = true; 2834 sdata->u.mgd.reconnect = reconnect; 2835 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2836 } 2837 EXPORT_SYMBOL(ieee80211_disconnect); 2838 2839 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2840 bool assoc) 2841 { 2842 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2843 2844 sdata_assert_lock(sdata); 2845 2846 if (!assoc) { 2847 /* 2848 * we are not authenticated yet, the only timer that could be 2849 * running is the timeout for the authentication response which 2850 * which is not relevant anymore. 2851 */ 2852 del_timer_sync(&sdata->u.mgd.timer); 2853 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2854 2855 eth_zero_addr(sdata->u.mgd.bssid); 2856 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2857 sdata->u.mgd.flags = 0; 2858 mutex_lock(&sdata->local->mtx); 2859 ieee80211_vif_release_channel(sdata); 2860 mutex_unlock(&sdata->local->mtx); 2861 } 2862 2863 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2864 kfree(auth_data); 2865 sdata->u.mgd.auth_data = NULL; 2866 } 2867 2868 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2869 bool assoc, bool abandon) 2870 { 2871 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2872 2873 sdata_assert_lock(sdata); 2874 2875 if (!assoc) { 2876 /* 2877 * we are not associated yet, the only timer that could be 2878 * running is the timeout for the association response which 2879 * which is not relevant anymore. 2880 */ 2881 del_timer_sync(&sdata->u.mgd.timer); 2882 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2883 2884 eth_zero_addr(sdata->u.mgd.bssid); 2885 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2886 sdata->u.mgd.flags = 0; 2887 sdata->vif.mu_mimo_owner = false; 2888 2889 mutex_lock(&sdata->local->mtx); 2890 ieee80211_vif_release_channel(sdata); 2891 mutex_unlock(&sdata->local->mtx); 2892 2893 if (abandon) 2894 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2895 } 2896 2897 kfree(assoc_data); 2898 sdata->u.mgd.assoc_data = NULL; 2899 } 2900 2901 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2902 struct ieee80211_mgmt *mgmt, size_t len) 2903 { 2904 struct ieee80211_local *local = sdata->local; 2905 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2906 const struct element *challenge; 2907 u8 *pos; 2908 u32 tx_flags = 0; 2909 struct ieee80211_prep_tx_info info = { 2910 .subtype = IEEE80211_STYPE_AUTH, 2911 }; 2912 2913 pos = mgmt->u.auth.variable; 2914 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 2915 len - (pos - (u8 *)mgmt)); 2916 if (!challenge) 2917 return; 2918 auth_data->expected_transaction = 4; 2919 drv_mgd_prepare_tx(sdata->local, sdata, &info); 2920 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2921 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2922 IEEE80211_TX_INTFL_MLME_CONN_TX; 2923 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2924 (void *)challenge, 2925 challenge->datalen + sizeof(*challenge), 2926 auth_data->bss->bssid, auth_data->bss->bssid, 2927 auth_data->key, auth_data->key_len, 2928 auth_data->key_idx, tx_flags); 2929 } 2930 2931 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata, 2932 const u8 *bssid) 2933 { 2934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2935 struct sta_info *sta; 2936 bool result = true; 2937 2938 sdata_info(sdata, "authenticated\n"); 2939 ifmgd->auth_data->done = true; 2940 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2941 ifmgd->auth_data->timeout_started = true; 2942 run_again(sdata, ifmgd->auth_data->timeout); 2943 2944 /* move station state to auth */ 2945 mutex_lock(&sdata->local->sta_mtx); 2946 sta = sta_info_get(sdata, bssid); 2947 if (!sta) { 2948 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2949 result = false; 2950 goto out; 2951 } 2952 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2953 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2954 result = false; 2955 goto out; 2956 } 2957 2958 out: 2959 mutex_unlock(&sdata->local->sta_mtx); 2960 return result; 2961 } 2962 2963 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2964 struct ieee80211_mgmt *mgmt, size_t len) 2965 { 2966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2967 u8 bssid[ETH_ALEN]; 2968 u16 auth_alg, auth_transaction, status_code; 2969 struct ieee80211_event event = { 2970 .type = MLME_EVENT, 2971 .u.mlme.data = AUTH_EVENT, 2972 }; 2973 struct ieee80211_prep_tx_info info = { 2974 .subtype = IEEE80211_STYPE_AUTH, 2975 }; 2976 2977 sdata_assert_lock(sdata); 2978 2979 if (len < 24 + 6) 2980 return; 2981 2982 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2983 return; 2984 2985 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2986 2987 if (!ether_addr_equal(bssid, mgmt->bssid)) 2988 return; 2989 2990 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2991 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2992 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2993 2994 if (auth_alg != ifmgd->auth_data->algorithm || 2995 (auth_alg != WLAN_AUTH_SAE && 2996 auth_transaction != ifmgd->auth_data->expected_transaction) || 2997 (auth_alg == WLAN_AUTH_SAE && 2998 (auth_transaction < ifmgd->auth_data->expected_transaction || 2999 auth_transaction > 2))) { 3000 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3001 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3002 auth_transaction, 3003 ifmgd->auth_data->expected_transaction); 3004 goto notify_driver; 3005 } 3006 3007 if (status_code != WLAN_STATUS_SUCCESS) { 3008 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3009 3010 if (auth_alg == WLAN_AUTH_SAE && 3011 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3012 (auth_transaction == 1 && 3013 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3014 status_code == WLAN_STATUS_SAE_PK)))) 3015 goto notify_driver; 3016 3017 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3018 mgmt->sa, status_code); 3019 ieee80211_destroy_auth_data(sdata, false); 3020 event.u.mlme.status = MLME_DENIED; 3021 event.u.mlme.reason = status_code; 3022 drv_event_callback(sdata->local, sdata, &event); 3023 goto notify_driver; 3024 } 3025 3026 switch (ifmgd->auth_data->algorithm) { 3027 case WLAN_AUTH_OPEN: 3028 case WLAN_AUTH_LEAP: 3029 case WLAN_AUTH_FT: 3030 case WLAN_AUTH_SAE: 3031 case WLAN_AUTH_FILS_SK: 3032 case WLAN_AUTH_FILS_SK_PFS: 3033 case WLAN_AUTH_FILS_PK: 3034 break; 3035 case WLAN_AUTH_SHARED_KEY: 3036 if (ifmgd->auth_data->expected_transaction != 4) { 3037 ieee80211_auth_challenge(sdata, mgmt, len); 3038 /* need another frame */ 3039 return; 3040 } 3041 break; 3042 default: 3043 WARN_ONCE(1, "invalid auth alg %d", 3044 ifmgd->auth_data->algorithm); 3045 goto notify_driver; 3046 } 3047 3048 event.u.mlme.status = MLME_SUCCESS; 3049 info.success = 1; 3050 drv_event_callback(sdata->local, sdata, &event); 3051 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3052 (auth_transaction == 2 && 3053 ifmgd->auth_data->expected_transaction == 2)) { 3054 if (!ieee80211_mark_sta_auth(sdata, bssid)) 3055 return; /* ignore frame -- wait for timeout */ 3056 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3057 auth_transaction == 2) { 3058 sdata_info(sdata, "SAE peer confirmed\n"); 3059 ifmgd->auth_data->peer_confirmed = true; 3060 } 3061 3062 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3063 notify_driver: 3064 drv_mgd_complete_tx(sdata->local, sdata, &info); 3065 } 3066 3067 #define case_WLAN(type) \ 3068 case WLAN_REASON_##type: return #type 3069 3070 const char *ieee80211_get_reason_code_string(u16 reason_code) 3071 { 3072 switch (reason_code) { 3073 case_WLAN(UNSPECIFIED); 3074 case_WLAN(PREV_AUTH_NOT_VALID); 3075 case_WLAN(DEAUTH_LEAVING); 3076 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3077 case_WLAN(DISASSOC_AP_BUSY); 3078 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3079 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3080 case_WLAN(DISASSOC_STA_HAS_LEFT); 3081 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3082 case_WLAN(DISASSOC_BAD_POWER); 3083 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3084 case_WLAN(INVALID_IE); 3085 case_WLAN(MIC_FAILURE); 3086 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3087 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3088 case_WLAN(IE_DIFFERENT); 3089 case_WLAN(INVALID_GROUP_CIPHER); 3090 case_WLAN(INVALID_PAIRWISE_CIPHER); 3091 case_WLAN(INVALID_AKMP); 3092 case_WLAN(UNSUPP_RSN_VERSION); 3093 case_WLAN(INVALID_RSN_IE_CAP); 3094 case_WLAN(IEEE8021X_FAILED); 3095 case_WLAN(CIPHER_SUITE_REJECTED); 3096 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3097 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3098 case_WLAN(DISASSOC_LOW_ACK); 3099 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3100 case_WLAN(QSTA_LEAVE_QBSS); 3101 case_WLAN(QSTA_NOT_USE); 3102 case_WLAN(QSTA_REQUIRE_SETUP); 3103 case_WLAN(QSTA_TIMEOUT); 3104 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3105 case_WLAN(MESH_PEER_CANCELED); 3106 case_WLAN(MESH_MAX_PEERS); 3107 case_WLAN(MESH_CONFIG); 3108 case_WLAN(MESH_CLOSE); 3109 case_WLAN(MESH_MAX_RETRIES); 3110 case_WLAN(MESH_CONFIRM_TIMEOUT); 3111 case_WLAN(MESH_INVALID_GTK); 3112 case_WLAN(MESH_INCONSISTENT_PARAM); 3113 case_WLAN(MESH_INVALID_SECURITY); 3114 case_WLAN(MESH_PATH_ERROR); 3115 case_WLAN(MESH_PATH_NOFORWARD); 3116 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3117 case_WLAN(MAC_EXISTS_IN_MBSS); 3118 case_WLAN(MESH_CHAN_REGULATORY); 3119 case_WLAN(MESH_CHAN); 3120 default: return "<unknown>"; 3121 } 3122 } 3123 3124 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3125 struct ieee80211_mgmt *mgmt, size_t len) 3126 { 3127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3128 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3129 3130 sdata_assert_lock(sdata); 3131 3132 if (len < 24 + 2) 3133 return; 3134 3135 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3136 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3137 return; 3138 } 3139 3140 if (ifmgd->associated && 3141 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 3142 const u8 *bssid = ifmgd->associated->bssid; 3143 3144 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 3145 bssid, reason_code, 3146 ieee80211_get_reason_code_string(reason_code)); 3147 3148 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3149 3150 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 3151 reason_code, false); 3152 return; 3153 } 3154 3155 if (ifmgd->assoc_data && 3156 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3157 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 3158 3159 sdata_info(sdata, 3160 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 3161 bssid, reason_code, 3162 ieee80211_get_reason_code_string(reason_code)); 3163 3164 ieee80211_destroy_assoc_data(sdata, false, true); 3165 3166 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3167 return; 3168 } 3169 } 3170 3171 3172 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 3173 struct ieee80211_mgmt *mgmt, size_t len) 3174 { 3175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3176 u16 reason_code; 3177 3178 sdata_assert_lock(sdata); 3179 3180 if (len < 24 + 2) 3181 return; 3182 3183 if (!ifmgd->associated || 3184 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3185 return; 3186 3187 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 3188 3189 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3190 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3191 return; 3192 } 3193 3194 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 3195 mgmt->sa, reason_code, 3196 ieee80211_get_reason_code_string(reason_code)); 3197 3198 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 3199 3200 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 3201 false); 3202 } 3203 3204 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 3205 u8 *supp_rates, unsigned int supp_rates_len, 3206 u32 *rates, u32 *basic_rates, 3207 bool *have_higher_than_11mbit, 3208 int *min_rate, int *min_rate_index, 3209 int shift) 3210 { 3211 int i, j; 3212 3213 for (i = 0; i < supp_rates_len; i++) { 3214 int rate = supp_rates[i] & 0x7f; 3215 bool is_basic = !!(supp_rates[i] & 0x80); 3216 3217 if ((rate * 5 * (1 << shift)) > 110) 3218 *have_higher_than_11mbit = true; 3219 3220 /* 3221 * Skip HT, VHT, HE and SAE H2E only BSS membership selectors 3222 * since they're not rates. 3223 * 3224 * Note: Even though the membership selector and the basic 3225 * rate flag share the same bit, they are not exactly 3226 * the same. 3227 */ 3228 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 3229 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 3230 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 3231 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 3232 continue; 3233 3234 for (j = 0; j < sband->n_bitrates; j++) { 3235 struct ieee80211_rate *br; 3236 int brate; 3237 3238 br = &sband->bitrates[j]; 3239 3240 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3241 if (brate == rate) { 3242 *rates |= BIT(j); 3243 if (is_basic) 3244 *basic_rates |= BIT(j); 3245 if ((rate * 5) < *min_rate) { 3246 *min_rate = rate * 5; 3247 *min_rate_index = j; 3248 } 3249 break; 3250 } 3251 } 3252 } 3253 } 3254 3255 static bool ieee80211_twt_req_supported(const struct sta_info *sta, 3256 const struct ieee802_11_elems *elems) 3257 { 3258 if (elems->ext_capab_len < 10) 3259 return false; 3260 3261 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 3262 return false; 3263 3264 return sta->sta.he_cap.he_cap_elem.mac_cap_info[0] & 3265 IEEE80211_HE_MAC_CAP0_TWT_RES; 3266 } 3267 3268 static int ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 3269 struct sta_info *sta, 3270 struct ieee802_11_elems *elems) 3271 { 3272 bool twt = ieee80211_twt_req_supported(sta, elems); 3273 3274 if (sdata->vif.bss_conf.twt_requester != twt) { 3275 sdata->vif.bss_conf.twt_requester = twt; 3276 return BSS_CHANGED_TWT; 3277 } 3278 return 0; 3279 } 3280 3281 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 3282 struct ieee80211_bss_conf *bss_conf, 3283 struct ieee80211_supported_band *sband, 3284 struct sta_info *sta) 3285 { 3286 const struct ieee80211_sta_he_cap *own_he_cap = 3287 ieee80211_get_he_iftype_cap(sband, 3288 ieee80211_vif_type_p2p(&sdata->vif)); 3289 3290 return bss_conf->he_support && 3291 (sta->sta.he_cap.he_cap_elem.mac_cap_info[2] & 3292 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 3293 own_he_cap && 3294 (own_he_cap->he_cap_elem.mac_cap_info[2] & 3295 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 3296 } 3297 3298 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 3299 struct cfg80211_bss *cbss, 3300 struct ieee80211_mgmt *mgmt, size_t len, 3301 struct ieee802_11_elems *elems) 3302 { 3303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3304 struct ieee80211_local *local = sdata->local; 3305 struct ieee80211_supported_band *sband; 3306 struct sta_info *sta; 3307 u16 capab_info, aid; 3308 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3309 const struct cfg80211_bss_ies *bss_ies = NULL; 3310 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3311 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 3312 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 3313 u32 changed = 0; 3314 u8 *pos; 3315 int err; 3316 bool ret; 3317 3318 /* AssocResp and ReassocResp have identical structure */ 3319 3320 pos = mgmt->u.assoc_resp.variable; 3321 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3322 if (is_s1g) { 3323 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3324 aid = 0; /* TODO */ 3325 } 3326 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3327 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3328 mgmt->bssid, assoc_data->bss->bssid); 3329 3330 if (!elems) 3331 return false; 3332 3333 if (elems->aid_resp) 3334 aid = le16_to_cpu(elems->aid_resp->aid); 3335 3336 /* 3337 * The 5 MSB of the AID field are reserved 3338 * (802.11-2016 9.4.1.8 AID field) 3339 */ 3340 aid &= 0x7ff; 3341 3342 ifmgd->broken_ap = false; 3343 3344 if (aid == 0 || aid > IEEE80211_MAX_AID) { 3345 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 3346 aid); 3347 aid = 0; 3348 ifmgd->broken_ap = true; 3349 } 3350 3351 if (!is_s1g && !elems->supp_rates) { 3352 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 3353 ret = false; 3354 goto out; 3355 } 3356 3357 sdata->vif.bss_conf.aid = aid; 3358 ifmgd->tdls_chan_switch_prohibited = 3359 elems->ext_capab && elems->ext_capab_len >= 5 && 3360 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 3361 3362 /* 3363 * Some APs are erroneously not including some information in their 3364 * (re)association response frames. Try to recover by using the data 3365 * from the beacon or probe response. This seems to afflict mobile 3366 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 3367 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 3368 */ 3369 if (!is_6ghz && 3370 ((assoc_data->wmm && !elems->wmm_param) || 3371 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3372 (!elems->ht_cap_elem || !elems->ht_operation)) || 3373 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3374 (!elems->vht_cap_elem || !elems->vht_operation)))) { 3375 const struct cfg80211_bss_ies *ies; 3376 struct ieee802_11_elems *bss_elems; 3377 3378 rcu_read_lock(); 3379 ies = rcu_dereference(cbss->ies); 3380 if (ies) 3381 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 3382 GFP_ATOMIC); 3383 rcu_read_unlock(); 3384 if (!bss_ies) { 3385 ret = false; 3386 goto out; 3387 } 3388 3389 bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 3390 false, mgmt->bssid, 3391 assoc_data->bss->bssid); 3392 if (!bss_elems) { 3393 ret = false; 3394 goto out; 3395 } 3396 3397 if (assoc_data->wmm && 3398 !elems->wmm_param && bss_elems->wmm_param) { 3399 elems->wmm_param = bss_elems->wmm_param; 3400 sdata_info(sdata, 3401 "AP bug: WMM param missing from AssocResp\n"); 3402 } 3403 3404 /* 3405 * Also check if we requested HT/VHT, otherwise the AP doesn't 3406 * have to include the IEs in the (re)association response. 3407 */ 3408 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 3409 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3410 elems->ht_cap_elem = bss_elems->ht_cap_elem; 3411 sdata_info(sdata, 3412 "AP bug: HT capability missing from AssocResp\n"); 3413 } 3414 if (!elems->ht_operation && bss_elems->ht_operation && 3415 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 3416 elems->ht_operation = bss_elems->ht_operation; 3417 sdata_info(sdata, 3418 "AP bug: HT operation missing from AssocResp\n"); 3419 } 3420 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 3421 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3422 elems->vht_cap_elem = bss_elems->vht_cap_elem; 3423 sdata_info(sdata, 3424 "AP bug: VHT capa missing from AssocResp\n"); 3425 } 3426 if (!elems->vht_operation && bss_elems->vht_operation && 3427 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 3428 elems->vht_operation = bss_elems->vht_operation; 3429 sdata_info(sdata, 3430 "AP bug: VHT operation missing from AssocResp\n"); 3431 } 3432 3433 kfree(bss_elems); 3434 } 3435 3436 /* 3437 * We previously checked these in the beacon/probe response, so 3438 * they should be present here. This is just a safety net. 3439 */ 3440 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 3441 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 3442 sdata_info(sdata, 3443 "HT AP is missing WMM params or HT capability/operation\n"); 3444 ret = false; 3445 goto out; 3446 } 3447 3448 if (!is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 3449 (!elems->vht_cap_elem || !elems->vht_operation)) { 3450 sdata_info(sdata, 3451 "VHT AP is missing VHT capability/operation\n"); 3452 ret = false; 3453 goto out; 3454 } 3455 3456 if (is_6ghz && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3457 !elems->he_6ghz_capa) { 3458 sdata_info(sdata, 3459 "HE 6 GHz AP is missing HE 6 GHz band capability\n"); 3460 ret = false; 3461 goto out; 3462 } 3463 3464 mutex_lock(&sdata->local->sta_mtx); 3465 /* 3466 * station info was already allocated and inserted before 3467 * the association and should be available to us 3468 */ 3469 sta = sta_info_get(sdata, cbss->bssid); 3470 if (WARN_ON(!sta)) { 3471 mutex_unlock(&sdata->local->sta_mtx); 3472 ret = false; 3473 goto out; 3474 } 3475 3476 sband = ieee80211_get_sband(sdata); 3477 if (!sband) { 3478 mutex_unlock(&sdata->local->sta_mtx); 3479 ret = false; 3480 goto out; 3481 } 3482 3483 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3484 (!elems->he_cap || !elems->he_operation)) { 3485 mutex_unlock(&sdata->local->sta_mtx); 3486 sdata_info(sdata, 3487 "HE AP is missing HE capability/operation\n"); 3488 ret = false; 3489 goto out; 3490 } 3491 3492 /* Set up internal HT/VHT capabilities */ 3493 if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3494 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3495 elems->ht_cap_elem, sta); 3496 3497 if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3498 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3499 elems->vht_cap_elem, sta); 3500 3501 if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) && 3502 elems->he_cap) { 3503 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 3504 elems->he_cap, 3505 elems->he_cap_len, 3506 elems->he_6ghz_capa, 3507 sta); 3508 3509 bss_conf->he_support = sta->sta.he_cap.has_he; 3510 if (elems->rsnx && elems->rsnx_len && 3511 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 3512 wiphy_ext_feature_isset(local->hw.wiphy, 3513 NL80211_EXT_FEATURE_PROTECTED_TWT)) 3514 bss_conf->twt_protected = true; 3515 else 3516 bss_conf->twt_protected = false; 3517 3518 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 3519 } else { 3520 bss_conf->he_support = false; 3521 bss_conf->twt_requester = false; 3522 bss_conf->twt_protected = false; 3523 } 3524 3525 bss_conf->twt_broadcast = 3526 ieee80211_twt_bcast_support(sdata, bss_conf, sband, sta); 3527 3528 if (bss_conf->he_support) { 3529 bss_conf->he_bss_color.color = 3530 le32_get_bits(elems->he_operation->he_oper_params, 3531 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 3532 bss_conf->he_bss_color.partial = 3533 le32_get_bits(elems->he_operation->he_oper_params, 3534 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 3535 bss_conf->he_bss_color.enabled = 3536 !le32_get_bits(elems->he_operation->he_oper_params, 3537 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3538 3539 if (bss_conf->he_bss_color.enabled) 3540 changed |= BSS_CHANGED_HE_BSS_COLOR; 3541 3542 bss_conf->htc_trig_based_pkt_ext = 3543 le32_get_bits(elems->he_operation->he_oper_params, 3544 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 3545 bss_conf->frame_time_rts_th = 3546 le32_get_bits(elems->he_operation->he_oper_params, 3547 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3548 3549 bss_conf->uora_exists = !!elems->uora_element; 3550 if (elems->uora_element) 3551 bss_conf->uora_ocw_range = elems->uora_element[0]; 3552 3553 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 3554 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 3555 /* TODO: OPEN: what happens if BSS color disable is set? */ 3556 } 3557 3558 if (cbss->transmitted_bss) { 3559 bss_conf->nontransmitted = true; 3560 ether_addr_copy(bss_conf->transmitter_bssid, 3561 cbss->transmitted_bss->bssid); 3562 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 3563 bss_conf->bssid_index = cbss->bssid_index; 3564 } 3565 3566 /* 3567 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3568 * in their association response, so ignore that data for our own 3569 * configuration. If it changed since the last beacon, we'll get the 3570 * next beacon and update then. 3571 */ 3572 3573 /* 3574 * If an operating mode notification IE is present, override the 3575 * NSS calculation (that would be done in rate_control_rate_init()) 3576 * and use the # of streams from that element. 3577 */ 3578 if (elems->opmode_notif && 3579 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3580 u8 nss; 3581 3582 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3583 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3584 nss += 1; 3585 sta->sta.rx_nss = nss; 3586 } 3587 3588 rate_control_rate_init(sta); 3589 3590 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3591 set_sta_flag(sta, WLAN_STA_MFP); 3592 sta->sta.mfp = true; 3593 } else { 3594 sta->sta.mfp = false; 3595 } 3596 3597 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 3598 local->hw.queues >= IEEE80211_NUM_ACS; 3599 3600 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3601 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3602 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3603 if (err) { 3604 sdata_info(sdata, 3605 "failed to move station %pM to desired state\n", 3606 sta->sta.addr); 3607 WARN_ON(__sta_info_destroy(sta)); 3608 mutex_unlock(&sdata->local->sta_mtx); 3609 ret = false; 3610 goto out; 3611 } 3612 3613 if (sdata->wdev.use_4addr) 3614 drv_sta_set_4addr(local, sdata, &sta->sta, true); 3615 3616 mutex_unlock(&sdata->local->sta_mtx); 3617 3618 /* 3619 * Always handle WMM once after association regardless 3620 * of the first value the AP uses. Setting -1 here has 3621 * that effect because the AP values is an unsigned 3622 * 4-bit value. 3623 */ 3624 ifmgd->wmm_last_param_set = -1; 3625 ifmgd->mu_edca_last_param_set = -1; 3626 3627 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3628 ieee80211_set_wmm_default(sdata, false, false); 3629 } else if (!ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 3630 elems->wmm_param_len, 3631 elems->mu_edca_param_set)) { 3632 /* still enable QoS since we might have HT/VHT */ 3633 ieee80211_set_wmm_default(sdata, false, true); 3634 /* set the disable-WMM flag in this case to disable 3635 * tracking WMM parameter changes in the beacon if 3636 * the parameters weren't actually valid. Doing so 3637 * avoids changing parameters very strangely when 3638 * the AP is going back and forth between valid and 3639 * invalid parameters. 3640 */ 3641 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3642 } 3643 changed |= BSS_CHANGED_QOS; 3644 3645 if (elems->max_idle_period_ie) { 3646 bss_conf->max_idle_period = 3647 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 3648 bss_conf->protected_keep_alive = 3649 !!(elems->max_idle_period_ie->idle_options & 3650 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 3651 changed |= BSS_CHANGED_KEEP_ALIVE; 3652 } else { 3653 bss_conf->max_idle_period = 0; 3654 bss_conf->protected_keep_alive = false; 3655 } 3656 3657 /* set assoc capability (AID was already set earlier), 3658 * ieee80211_set_associated() will tell the driver */ 3659 bss_conf->assoc_capability = capab_info; 3660 ieee80211_set_associated(sdata, cbss, changed); 3661 3662 /* 3663 * If we're using 4-addr mode, let the AP know that we're 3664 * doing so, so that it can create the STA VLAN on its side 3665 */ 3666 if (ifmgd->use_4addr) 3667 ieee80211_send_4addr_nullfunc(local, sdata); 3668 3669 /* 3670 * Start timer to probe the connection to the AP now. 3671 * Also start the timer that will detect beacon loss. 3672 */ 3673 ieee80211_sta_reset_beacon_monitor(sdata); 3674 ieee80211_sta_reset_conn_monitor(sdata); 3675 3676 ret = true; 3677 out: 3678 kfree(elems); 3679 kfree(bss_ies); 3680 return ret; 3681 } 3682 3683 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3684 struct ieee80211_mgmt *mgmt, 3685 size_t len) 3686 { 3687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3688 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3689 u16 capab_info, status_code, aid; 3690 struct ieee802_11_elems *elems; 3691 int ac, uapsd_queues = -1; 3692 u8 *pos; 3693 bool reassoc; 3694 struct cfg80211_bss *cbss; 3695 struct ieee80211_event event = { 3696 .type = MLME_EVENT, 3697 .u.mlme.data = ASSOC_EVENT, 3698 }; 3699 struct ieee80211_prep_tx_info info = {}; 3700 3701 sdata_assert_lock(sdata); 3702 3703 if (!assoc_data) 3704 return; 3705 3706 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3707 return; 3708 3709 cbss = assoc_data->bss; 3710 3711 /* 3712 * AssocResp and ReassocResp have identical structure, so process both 3713 * of them in this function. 3714 */ 3715 3716 if (len < 24 + 6) 3717 return; 3718 3719 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 3720 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3721 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3722 pos = mgmt->u.assoc_resp.variable; 3723 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3724 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 3725 pos = (u8 *) mgmt->u.s1g_assoc_resp.variable; 3726 aid = 0; /* TODO */ 3727 } 3728 3729 /* 3730 * Note: this may not be perfect, AP might misbehave - if 3731 * anyone needs to rely on perfect complete notification 3732 * with the exact right subtype, then we need to track what 3733 * we actually transmitted. 3734 */ 3735 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 3736 IEEE80211_STYPE_ASSOC_REQ; 3737 3738 sdata_info(sdata, 3739 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3740 reassoc ? "Rea" : "A", mgmt->sa, 3741 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3742 3743 if (assoc_data->fils_kek_len && 3744 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3745 return; 3746 3747 elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, 3748 mgmt->bssid, assoc_data->bss->bssid); 3749 if (!elems) 3750 goto notify_driver; 3751 3752 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3753 elems->timeout_int && 3754 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3755 u32 tu, ms; 3756 3757 cfg80211_assoc_comeback(sdata->dev, assoc_data->bss, 3758 le32_to_cpu(elems->timeout_int->value)); 3759 3760 tu = le32_to_cpu(elems->timeout_int->value); 3761 ms = tu * 1024 / 1000; 3762 sdata_info(sdata, 3763 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3764 mgmt->sa, tu, ms); 3765 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3766 assoc_data->timeout_started = true; 3767 if (ms > IEEE80211_ASSOC_TIMEOUT) 3768 run_again(sdata, assoc_data->timeout); 3769 goto notify_driver; 3770 } 3771 3772 if (status_code != WLAN_STATUS_SUCCESS) { 3773 sdata_info(sdata, "%pM denied association (code=%d)\n", 3774 mgmt->sa, status_code); 3775 ieee80211_destroy_assoc_data(sdata, false, false); 3776 event.u.mlme.status = MLME_DENIED; 3777 event.u.mlme.reason = status_code; 3778 drv_event_callback(sdata->local, sdata, &event); 3779 } else { 3780 if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { 3781 /* oops -- internal error -- send timeout for now */ 3782 ieee80211_destroy_assoc_data(sdata, false, false); 3783 cfg80211_assoc_timeout(sdata->dev, cbss); 3784 goto notify_driver; 3785 } 3786 event.u.mlme.status = MLME_SUCCESS; 3787 drv_event_callback(sdata->local, sdata, &event); 3788 sdata_info(sdata, "associated\n"); 3789 3790 /* 3791 * destroy assoc_data afterwards, as otherwise an idle 3792 * recalc after assoc_data is NULL but before associated 3793 * is set can cause the interface to go idle 3794 */ 3795 ieee80211_destroy_assoc_data(sdata, true, false); 3796 3797 /* get uapsd queues configuration */ 3798 uapsd_queues = 0; 3799 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3800 if (sdata->tx_conf[ac].uapsd) 3801 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3802 3803 info.success = 1; 3804 } 3805 3806 cfg80211_rx_assoc_resp(sdata->dev, cbss, (u8 *)mgmt, len, uapsd_queues, 3807 ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); 3808 notify_driver: 3809 drv_mgd_complete_tx(sdata->local, sdata, &info); 3810 kfree(elems); 3811 } 3812 3813 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3814 struct ieee80211_mgmt *mgmt, size_t len, 3815 struct ieee80211_rx_status *rx_status) 3816 { 3817 struct ieee80211_local *local = sdata->local; 3818 struct ieee80211_bss *bss; 3819 struct ieee80211_channel *channel; 3820 3821 sdata_assert_lock(sdata); 3822 3823 channel = ieee80211_get_channel_khz(local->hw.wiphy, 3824 ieee80211_rx_status_to_khz(rx_status)); 3825 if (!channel) 3826 return; 3827 3828 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 3829 if (bss) { 3830 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3831 ieee80211_rx_bss_put(local, bss); 3832 } 3833 } 3834 3835 3836 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3837 struct sk_buff *skb) 3838 { 3839 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3840 struct ieee80211_if_managed *ifmgd; 3841 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3842 struct ieee80211_channel *channel; 3843 size_t baselen, len = skb->len; 3844 3845 ifmgd = &sdata->u.mgd; 3846 3847 sdata_assert_lock(sdata); 3848 3849 /* 3850 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 3851 * "If a 6 GHz AP receives a Probe Request frame and responds with 3852 * a Probe Response frame [..], the Address 1 field of the Probe 3853 * Response frame shall be set to the broadcast address [..]" 3854 * So, on 6GHz band we should also accept broadcast responses. 3855 */ 3856 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 3857 rx_status->freq); 3858 if (!channel) 3859 return; 3860 3861 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 3862 (channel->band != NL80211_BAND_6GHZ || 3863 !is_broadcast_ether_addr(mgmt->da))) 3864 return; /* ignore ProbeResp to foreign address */ 3865 3866 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3867 if (baselen > len) 3868 return; 3869 3870 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 3871 3872 if (ifmgd->associated && 3873 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3874 ieee80211_reset_ap_probe(sdata); 3875 } 3876 3877 /* 3878 * This is the canonical list of information elements we care about, 3879 * the filter code also gives us all changes to the Microsoft OUI 3880 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3881 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3882 * changes to requested client power. 3883 * 3884 * We implement beacon filtering in software since that means we can 3885 * avoid processing the frame here and in cfg80211, and userspace 3886 * will not be able to tell whether the hardware supports it or not. 3887 * 3888 * XXX: This list needs to be dynamic -- userspace needs to be able to 3889 * add items it requires. It also needs to be able to tell us to 3890 * look out for other vendor IEs. 3891 */ 3892 static const u64 care_about_ies = 3893 (1ULL << WLAN_EID_COUNTRY) | 3894 (1ULL << WLAN_EID_ERP_INFO) | 3895 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3896 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3897 (1ULL << WLAN_EID_HT_CAPABILITY) | 3898 (1ULL << WLAN_EID_HT_OPERATION) | 3899 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3900 3901 static void ieee80211_handle_beacon_sig(struct ieee80211_sub_if_data *sdata, 3902 struct ieee80211_if_managed *ifmgd, 3903 struct ieee80211_bss_conf *bss_conf, 3904 struct ieee80211_local *local, 3905 struct ieee80211_rx_status *rx_status) 3906 { 3907 /* Track average RSSI from the Beacon frames of the current AP */ 3908 3909 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3910 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3911 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3912 ifmgd->last_cqm_event_signal = 0; 3913 ifmgd->count_beacon_signal = 1; 3914 ifmgd->last_ave_beacon_signal = 0; 3915 } else { 3916 ifmgd->count_beacon_signal++; 3917 } 3918 3919 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3920 3921 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3922 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3923 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3924 int last_sig = ifmgd->last_ave_beacon_signal; 3925 struct ieee80211_event event = { 3926 .type = RSSI_EVENT, 3927 }; 3928 3929 /* 3930 * if signal crosses either of the boundaries, invoke callback 3931 * with appropriate parameters 3932 */ 3933 if (sig > ifmgd->rssi_max_thold && 3934 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3935 ifmgd->last_ave_beacon_signal = sig; 3936 event.u.rssi.data = RSSI_EVENT_HIGH; 3937 drv_event_callback(local, sdata, &event); 3938 } else if (sig < ifmgd->rssi_min_thold && 3939 (last_sig >= ifmgd->rssi_max_thold || 3940 last_sig == 0)) { 3941 ifmgd->last_ave_beacon_signal = sig; 3942 event.u.rssi.data = RSSI_EVENT_LOW; 3943 drv_event_callback(local, sdata, &event); 3944 } 3945 } 3946 3947 if (bss_conf->cqm_rssi_thold && 3948 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3949 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3950 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3951 int last_event = ifmgd->last_cqm_event_signal; 3952 int thold = bss_conf->cqm_rssi_thold; 3953 int hyst = bss_conf->cqm_rssi_hyst; 3954 3955 if (sig < thold && 3956 (last_event == 0 || sig < last_event - hyst)) { 3957 ifmgd->last_cqm_event_signal = sig; 3958 ieee80211_cqm_rssi_notify( 3959 &sdata->vif, 3960 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3961 sig, GFP_KERNEL); 3962 } else if (sig > thold && 3963 (last_event == 0 || sig > last_event + hyst)) { 3964 ifmgd->last_cqm_event_signal = sig; 3965 ieee80211_cqm_rssi_notify( 3966 &sdata->vif, 3967 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3968 sig, GFP_KERNEL); 3969 } 3970 } 3971 3972 if (bss_conf->cqm_rssi_low && 3973 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3974 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3975 int last_event = ifmgd->last_cqm_event_signal; 3976 int low = bss_conf->cqm_rssi_low; 3977 int high = bss_conf->cqm_rssi_high; 3978 3979 if (sig < low && 3980 (last_event == 0 || last_event >= low)) { 3981 ifmgd->last_cqm_event_signal = sig; 3982 ieee80211_cqm_rssi_notify( 3983 &sdata->vif, 3984 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3985 sig, GFP_KERNEL); 3986 } else if (sig > high && 3987 (last_event == 0 || last_event <= high)) { 3988 ifmgd->last_cqm_event_signal = sig; 3989 ieee80211_cqm_rssi_notify( 3990 &sdata->vif, 3991 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3992 sig, GFP_KERNEL); 3993 } 3994 } 3995 } 3996 3997 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 3998 struct cfg80211_bss *bss) 3999 { 4000 if (ether_addr_equal(tx_bssid, bss->bssid)) 4001 return true; 4002 if (!bss->transmitted_bss) 4003 return false; 4004 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 4005 } 4006 4007 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 4008 struct ieee80211_hdr *hdr, size_t len, 4009 struct ieee80211_rx_status *rx_status) 4010 { 4011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4012 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 4013 struct ieee80211_mgmt *mgmt = (void *) hdr; 4014 size_t baselen; 4015 struct ieee802_11_elems *elems; 4016 struct ieee80211_local *local = sdata->local; 4017 struct ieee80211_chanctx_conf *chanctx_conf; 4018 struct ieee80211_channel *chan; 4019 struct sta_info *sta; 4020 u32 changed = 0; 4021 bool erp_valid; 4022 u8 erp_value = 0; 4023 u32 ncrc = 0; 4024 u8 *bssid, *variable = mgmt->u.beacon.variable; 4025 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4026 4027 sdata_assert_lock(sdata); 4028 4029 /* Process beacon from the current BSS */ 4030 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 4031 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 4032 struct ieee80211_ext *ext = (void *) mgmt; 4033 4034 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 4035 variable = ext->u.s1g_short_beacon.variable; 4036 else 4037 variable = ext->u.s1g_beacon.variable; 4038 } 4039 4040 baselen = (u8 *) variable - (u8 *) mgmt; 4041 if (baselen > len) 4042 return; 4043 4044 rcu_read_lock(); 4045 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4046 if (!chanctx_conf) { 4047 rcu_read_unlock(); 4048 return; 4049 } 4050 4051 if (ieee80211_rx_status_to_khz(rx_status) != 4052 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 4053 rcu_read_unlock(); 4054 return; 4055 } 4056 chan = chanctx_conf->def.chan; 4057 rcu_read_unlock(); 4058 4059 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 4060 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { 4061 elems = ieee802_11_parse_elems(variable, len - baselen, false, 4062 bssid, 4063 ifmgd->assoc_data->bss->bssid); 4064 if (!elems) 4065 return; 4066 4067 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4068 4069 if (elems->dtim_period) 4070 ifmgd->dtim_period = elems->dtim_period; 4071 ifmgd->have_beacon = true; 4072 ifmgd->assoc_data->need_beacon = false; 4073 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4074 sdata->vif.bss_conf.sync_tsf = 4075 le64_to_cpu(mgmt->u.beacon.timestamp); 4076 sdata->vif.bss_conf.sync_device_ts = 4077 rx_status->device_timestamp; 4078 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4079 } 4080 4081 if (elems->mbssid_config_ie) 4082 bss_conf->profile_periodicity = 4083 elems->mbssid_config_ie->profile_periodicity; 4084 else 4085 bss_conf->profile_periodicity = 0; 4086 4087 if (elems->ext_capab_len >= 11 && 4088 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 4089 bss_conf->ema_ap = true; 4090 else 4091 bss_conf->ema_ap = false; 4092 4093 /* continue assoc process */ 4094 ifmgd->assoc_data->timeout = jiffies; 4095 ifmgd->assoc_data->timeout_started = true; 4096 run_again(sdata, ifmgd->assoc_data->timeout); 4097 kfree(elems); 4098 return; 4099 } 4100 4101 if (!ifmgd->associated || 4102 !ieee80211_rx_our_beacon(bssid, ifmgd->associated)) 4103 return; 4104 bssid = ifmgd->associated->bssid; 4105 4106 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 4107 ieee80211_handle_beacon_sig(sdata, ifmgd, bss_conf, 4108 local, rx_status); 4109 4110 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 4111 mlme_dbg_ratelimited(sdata, 4112 "cancelling AP probe due to a received beacon\n"); 4113 ieee80211_reset_ap_probe(sdata); 4114 } 4115 4116 /* 4117 * Push the beacon loss detection into the future since 4118 * we are processing a beacon from the AP just now. 4119 */ 4120 ieee80211_sta_reset_beacon_monitor(sdata); 4121 4122 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 4123 * element (which carries the beacon interval). Don't forget to add a 4124 * bit to care_about_ies[] above if mac80211 is interested in a 4125 * changing S1G element. 4126 */ 4127 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4128 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 4129 elems = ieee802_11_parse_elems_crc(variable, len - baselen, 4130 false, care_about_ies, ncrc, 4131 mgmt->bssid, bssid); 4132 if (!elems) 4133 return; 4134 ncrc = elems->crc; 4135 4136 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 4137 ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { 4138 if (local->hw.conf.dynamic_ps_timeout > 0) { 4139 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4140 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4141 ieee80211_hw_config(local, 4142 IEEE80211_CONF_CHANGE_PS); 4143 } 4144 ieee80211_send_nullfunc(local, sdata, false); 4145 } else if (!local->pspolling && sdata->u.mgd.powersave) { 4146 local->pspolling = true; 4147 4148 /* 4149 * Here is assumed that the driver will be 4150 * able to send ps-poll frame and receive a 4151 * response even though power save mode is 4152 * enabled, but some drivers might require 4153 * to disable power save here. This needs 4154 * to be investigated. 4155 */ 4156 ieee80211_send_pspoll(local, sdata); 4157 } 4158 } 4159 4160 if (sdata->vif.p2p || 4161 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4162 struct ieee80211_p2p_noa_attr noa = {}; 4163 int ret; 4164 4165 ret = cfg80211_get_p2p_attr(variable, 4166 len - baselen, 4167 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4168 (u8 *) &noa, sizeof(noa)); 4169 if (ret >= 2) { 4170 if (sdata->u.mgd.p2p_noa_index != noa.index) { 4171 /* valid noa_attr and index changed */ 4172 sdata->u.mgd.p2p_noa_index = noa.index; 4173 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 4174 changed |= BSS_CHANGED_P2P_PS; 4175 /* 4176 * make sure we update all information, the CRC 4177 * mechanism doesn't look at P2P attributes. 4178 */ 4179 ifmgd->beacon_crc_valid = false; 4180 } 4181 } else if (sdata->u.mgd.p2p_noa_index != -1) { 4182 /* noa_attr not found and we had valid noa_attr before */ 4183 sdata->u.mgd.p2p_noa_index = -1; 4184 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 4185 changed |= BSS_CHANGED_P2P_PS; 4186 ifmgd->beacon_crc_valid = false; 4187 } 4188 } 4189 4190 if (ifmgd->csa_waiting_bcn) 4191 ieee80211_chswitch_post_beacon(sdata); 4192 4193 /* 4194 * Update beacon timing and dtim count on every beacon appearance. This 4195 * will allow the driver to use the most updated values. Do it before 4196 * comparing this one with last received beacon. 4197 * IMPORTANT: These parameters would possibly be out of sync by the time 4198 * the driver will use them. The synchronized view is currently 4199 * guaranteed only in certain callbacks. 4200 */ 4201 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 4202 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 4203 sdata->vif.bss_conf.sync_tsf = 4204 le64_to_cpu(mgmt->u.beacon.timestamp); 4205 sdata->vif.bss_conf.sync_device_ts = 4206 rx_status->device_timestamp; 4207 sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; 4208 } 4209 4210 if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || 4211 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 4212 goto free; 4213 ifmgd->beacon_crc = ncrc; 4214 ifmgd->beacon_crc_valid = true; 4215 4216 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); 4217 4218 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 4219 rx_status->device_timestamp, 4220 elems, true); 4221 4222 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 4223 ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, 4224 elems->wmm_param_len, 4225 elems->mu_edca_param_set)) 4226 changed |= BSS_CHANGED_QOS; 4227 4228 /* 4229 * If we haven't had a beacon before, tell the driver about the 4230 * DTIM period (and beacon timing if desired) now. 4231 */ 4232 if (!ifmgd->have_beacon) { 4233 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 4234 bss_conf->dtim_period = elems->dtim_period ?: 1; 4235 4236 changed |= BSS_CHANGED_BEACON_INFO; 4237 ifmgd->have_beacon = true; 4238 4239 mutex_lock(&local->iflist_mtx); 4240 ieee80211_recalc_ps(local); 4241 mutex_unlock(&local->iflist_mtx); 4242 4243 ieee80211_recalc_ps_vif(sdata); 4244 } 4245 4246 if (elems->erp_info) { 4247 erp_valid = true; 4248 erp_value = elems->erp_info[0]; 4249 } else { 4250 erp_valid = false; 4251 } 4252 4253 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 4254 changed |= ieee80211_handle_bss_capability(sdata, 4255 le16_to_cpu(mgmt->u.beacon.capab_info), 4256 erp_valid, erp_value); 4257 4258 mutex_lock(&local->sta_mtx); 4259 sta = sta_info_get(sdata, bssid); 4260 4261 changed |= ieee80211_recalc_twt_req(sdata, sta, elems); 4262 4263 if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, 4264 elems->vht_cap_elem, elems->ht_operation, 4265 elems->vht_operation, elems->he_operation, 4266 elems->s1g_oper, bssid, &changed)) { 4267 mutex_unlock(&local->sta_mtx); 4268 sdata_info(sdata, 4269 "failed to follow AP %pM bandwidth change, disconnect\n", 4270 bssid); 4271 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4272 WLAN_REASON_DEAUTH_LEAVING, 4273 true, deauth_buf); 4274 ieee80211_report_disconnect(sdata, deauth_buf, 4275 sizeof(deauth_buf), true, 4276 WLAN_REASON_DEAUTH_LEAVING, 4277 false); 4278 goto free; 4279 } 4280 4281 if (sta && elems->opmode_notif) 4282 ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, 4283 rx_status->band); 4284 mutex_unlock(&local->sta_mtx); 4285 4286 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 4287 elems->country_elem, 4288 elems->country_elem_len, 4289 elems->pwr_constr_elem, 4290 elems->cisco_dtpc_elem); 4291 4292 ieee80211_bss_info_change_notify(sdata, changed); 4293 free: 4294 kfree(elems); 4295 } 4296 4297 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 4298 struct sk_buff *skb) 4299 { 4300 struct ieee80211_rx_status *rx_status; 4301 struct ieee80211_hdr *hdr; 4302 u16 fc; 4303 4304 rx_status = (struct ieee80211_rx_status *) skb->cb; 4305 hdr = (struct ieee80211_hdr *) skb->data; 4306 fc = le16_to_cpu(hdr->frame_control); 4307 4308 sdata_lock(sdata); 4309 switch (fc & IEEE80211_FCTL_STYPE) { 4310 case IEEE80211_STYPE_S1G_BEACON: 4311 ieee80211_rx_mgmt_beacon(sdata, hdr, skb->len, rx_status); 4312 break; 4313 } 4314 sdata_unlock(sdata); 4315 } 4316 4317 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 4318 struct sk_buff *skb) 4319 { 4320 struct ieee80211_rx_status *rx_status; 4321 struct ieee80211_mgmt *mgmt; 4322 u16 fc; 4323 int ies_len; 4324 4325 rx_status = (struct ieee80211_rx_status *) skb->cb; 4326 mgmt = (struct ieee80211_mgmt *) skb->data; 4327 fc = le16_to_cpu(mgmt->frame_control); 4328 4329 sdata_lock(sdata); 4330 4331 switch (fc & IEEE80211_FCTL_STYPE) { 4332 case IEEE80211_STYPE_BEACON: 4333 ieee80211_rx_mgmt_beacon(sdata, (void *)mgmt, 4334 skb->len, rx_status); 4335 break; 4336 case IEEE80211_STYPE_PROBE_RESP: 4337 ieee80211_rx_mgmt_probe_resp(sdata, skb); 4338 break; 4339 case IEEE80211_STYPE_AUTH: 4340 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 4341 break; 4342 case IEEE80211_STYPE_DEAUTH: 4343 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 4344 break; 4345 case IEEE80211_STYPE_DISASSOC: 4346 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 4347 break; 4348 case IEEE80211_STYPE_ASSOC_RESP: 4349 case IEEE80211_STYPE_REASSOC_RESP: 4350 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 4351 break; 4352 case IEEE80211_STYPE_ACTION: 4353 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 4354 struct ieee802_11_elems *elems; 4355 4356 ies_len = skb->len - 4357 offsetof(struct ieee80211_mgmt, 4358 u.action.u.chan_switch.variable); 4359 4360 if (ies_len < 0) 4361 break; 4362 4363 /* CSA IE cannot be overridden, no need for BSSID */ 4364 elems = ieee802_11_parse_elems( 4365 mgmt->u.action.u.chan_switch.variable, 4366 ies_len, true, mgmt->bssid, NULL); 4367 4368 if (elems && !elems->parse_error) 4369 ieee80211_sta_process_chanswitch(sdata, 4370 rx_status->mactime, 4371 rx_status->device_timestamp, 4372 elems, false); 4373 kfree(elems); 4374 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 4375 struct ieee802_11_elems *elems; 4376 4377 ies_len = skb->len - 4378 offsetof(struct ieee80211_mgmt, 4379 u.action.u.ext_chan_switch.variable); 4380 4381 if (ies_len < 0) 4382 break; 4383 4384 /* 4385 * extended CSA IE can't be overridden, no need for 4386 * BSSID 4387 */ 4388 elems = ieee802_11_parse_elems( 4389 mgmt->u.action.u.ext_chan_switch.variable, 4390 ies_len, true, mgmt->bssid, NULL); 4391 4392 if (elems && !elems->parse_error) { 4393 /* for the handling code pretend it was an IE */ 4394 elems->ext_chansw_ie = 4395 &mgmt->u.action.u.ext_chan_switch.data; 4396 4397 ieee80211_sta_process_chanswitch(sdata, 4398 rx_status->mactime, 4399 rx_status->device_timestamp, 4400 elems, false); 4401 } 4402 4403 kfree(elems); 4404 } 4405 break; 4406 } 4407 sdata_unlock(sdata); 4408 } 4409 4410 static void ieee80211_sta_timer(struct timer_list *t) 4411 { 4412 struct ieee80211_sub_if_data *sdata = 4413 from_timer(sdata, t, u.mgd.timer); 4414 4415 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 4416 } 4417 4418 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 4419 u8 *bssid, u8 reason, bool tx) 4420 { 4421 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4422 4423 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 4424 tx, frame_buf); 4425 4426 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4427 reason, false); 4428 } 4429 4430 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 4431 { 4432 struct ieee80211_local *local = sdata->local; 4433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4434 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 4435 u32 tx_flags = 0; 4436 u16 trans = 1; 4437 u16 status = 0; 4438 struct ieee80211_prep_tx_info info = { 4439 .subtype = IEEE80211_STYPE_AUTH, 4440 }; 4441 4442 sdata_assert_lock(sdata); 4443 4444 if (WARN_ON_ONCE(!auth_data)) 4445 return -EINVAL; 4446 4447 auth_data->tries++; 4448 4449 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 4450 sdata_info(sdata, "authentication with %pM timed out\n", 4451 auth_data->bss->bssid); 4452 4453 /* 4454 * Most likely AP is not in the range so remove the 4455 * bss struct for that AP. 4456 */ 4457 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 4458 4459 return -ETIMEDOUT; 4460 } 4461 4462 if (auth_data->algorithm == WLAN_AUTH_SAE) 4463 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 4464 4465 drv_mgd_prepare_tx(local, sdata, &info); 4466 4467 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 4468 auth_data->bss->bssid, auth_data->tries, 4469 IEEE80211_AUTH_MAX_TRIES); 4470 4471 auth_data->expected_transaction = 2; 4472 4473 if (auth_data->algorithm == WLAN_AUTH_SAE) { 4474 trans = auth_data->sae_trans; 4475 status = auth_data->sae_status; 4476 auth_data->expected_transaction = trans; 4477 } 4478 4479 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4480 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4481 IEEE80211_TX_INTFL_MLME_CONN_TX; 4482 4483 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 4484 auth_data->data, auth_data->data_len, 4485 auth_data->bss->bssid, 4486 auth_data->bss->bssid, NULL, 0, 0, 4487 tx_flags); 4488 4489 if (tx_flags == 0) { 4490 if (auth_data->algorithm == WLAN_AUTH_SAE) 4491 auth_data->timeout = jiffies + 4492 IEEE80211_AUTH_TIMEOUT_SAE; 4493 else 4494 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 4495 } else { 4496 auth_data->timeout = 4497 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 4498 } 4499 4500 auth_data->timeout_started = true; 4501 run_again(sdata, auth_data->timeout); 4502 4503 return 0; 4504 } 4505 4506 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 4507 { 4508 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4509 struct ieee80211_local *local = sdata->local; 4510 int ret; 4511 4512 sdata_assert_lock(sdata); 4513 4514 assoc_data->tries++; 4515 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 4516 sdata_info(sdata, "association with %pM timed out\n", 4517 assoc_data->bss->bssid); 4518 4519 /* 4520 * Most likely AP is not in the range so remove the 4521 * bss struct for that AP. 4522 */ 4523 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 4524 4525 return -ETIMEDOUT; 4526 } 4527 4528 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 4529 assoc_data->bss->bssid, assoc_data->tries, 4530 IEEE80211_ASSOC_MAX_TRIES); 4531 ret = ieee80211_send_assoc(sdata); 4532 if (ret) 4533 return ret; 4534 4535 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4536 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 4537 assoc_data->timeout_started = true; 4538 run_again(sdata, assoc_data->timeout); 4539 } else { 4540 assoc_data->timeout = 4541 round_jiffies_up(jiffies + 4542 IEEE80211_ASSOC_TIMEOUT_LONG); 4543 assoc_data->timeout_started = true; 4544 run_again(sdata, assoc_data->timeout); 4545 } 4546 4547 return 0; 4548 } 4549 4550 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 4551 __le16 fc, bool acked) 4552 { 4553 struct ieee80211_local *local = sdata->local; 4554 4555 sdata->u.mgd.status_fc = fc; 4556 sdata->u.mgd.status_acked = acked; 4557 sdata->u.mgd.status_received = true; 4558 4559 ieee80211_queue_work(&local->hw, &sdata->work); 4560 } 4561 4562 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 4563 { 4564 struct ieee80211_local *local = sdata->local; 4565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4566 4567 sdata_lock(sdata); 4568 4569 if (ifmgd->status_received) { 4570 __le16 fc = ifmgd->status_fc; 4571 bool status_acked = ifmgd->status_acked; 4572 4573 ifmgd->status_received = false; 4574 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 4575 if (status_acked) { 4576 if (ifmgd->auth_data->algorithm == 4577 WLAN_AUTH_SAE) 4578 ifmgd->auth_data->timeout = 4579 jiffies + 4580 IEEE80211_AUTH_TIMEOUT_SAE; 4581 else 4582 ifmgd->auth_data->timeout = 4583 jiffies + 4584 IEEE80211_AUTH_TIMEOUT_SHORT; 4585 run_again(sdata, ifmgd->auth_data->timeout); 4586 } else { 4587 ifmgd->auth_data->timeout = jiffies - 1; 4588 } 4589 ifmgd->auth_data->timeout_started = true; 4590 } else if (ifmgd->assoc_data && 4591 (ieee80211_is_assoc_req(fc) || 4592 ieee80211_is_reassoc_req(fc))) { 4593 if (status_acked) { 4594 ifmgd->assoc_data->timeout = 4595 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 4596 run_again(sdata, ifmgd->assoc_data->timeout); 4597 } else { 4598 ifmgd->assoc_data->timeout = jiffies - 1; 4599 } 4600 ifmgd->assoc_data->timeout_started = true; 4601 } 4602 } 4603 4604 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 4605 time_after(jiffies, ifmgd->auth_data->timeout)) { 4606 if (ifmgd->auth_data->done) { 4607 /* 4608 * ok ... we waited for assoc but userspace didn't, 4609 * so let's just kill the auth data 4610 */ 4611 ieee80211_destroy_auth_data(sdata, false); 4612 } else if (ieee80211_auth(sdata)) { 4613 u8 bssid[ETH_ALEN]; 4614 struct ieee80211_event event = { 4615 .type = MLME_EVENT, 4616 .u.mlme.data = AUTH_EVENT, 4617 .u.mlme.status = MLME_TIMEOUT, 4618 }; 4619 4620 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 4621 4622 ieee80211_destroy_auth_data(sdata, false); 4623 4624 cfg80211_auth_timeout(sdata->dev, bssid); 4625 drv_event_callback(sdata->local, sdata, &event); 4626 } 4627 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 4628 run_again(sdata, ifmgd->auth_data->timeout); 4629 4630 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 4631 time_after(jiffies, ifmgd->assoc_data->timeout)) { 4632 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 4633 ieee80211_do_assoc(sdata)) { 4634 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 4635 struct ieee80211_event event = { 4636 .type = MLME_EVENT, 4637 .u.mlme.data = ASSOC_EVENT, 4638 .u.mlme.status = MLME_TIMEOUT, 4639 }; 4640 4641 ieee80211_destroy_assoc_data(sdata, false, false); 4642 cfg80211_assoc_timeout(sdata->dev, bss); 4643 drv_event_callback(sdata->local, sdata, &event); 4644 } 4645 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 4646 run_again(sdata, ifmgd->assoc_data->timeout); 4647 4648 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 4649 ifmgd->associated) { 4650 u8 bssid[ETH_ALEN]; 4651 int max_tries; 4652 4653 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4654 4655 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4656 max_tries = max_nullfunc_tries; 4657 else 4658 max_tries = max_probe_tries; 4659 4660 /* ACK received for nullfunc probing frame */ 4661 if (!ifmgd->probe_send_count) 4662 ieee80211_reset_ap_probe(sdata); 4663 else if (ifmgd->nullfunc_failed) { 4664 if (ifmgd->probe_send_count < max_tries) { 4665 mlme_dbg(sdata, 4666 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 4667 bssid, ifmgd->probe_send_count, 4668 max_tries); 4669 ieee80211_mgd_probe_ap_send(sdata); 4670 } else { 4671 mlme_dbg(sdata, 4672 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 4673 bssid); 4674 ieee80211_sta_connection_lost(sdata, bssid, 4675 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4676 false); 4677 } 4678 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 4679 run_again(sdata, ifmgd->probe_timeout); 4680 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 4681 mlme_dbg(sdata, 4682 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 4683 bssid, probe_wait_ms); 4684 ieee80211_sta_connection_lost(sdata, bssid, 4685 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4686 } else if (ifmgd->probe_send_count < max_tries) { 4687 mlme_dbg(sdata, 4688 "No probe response from AP %pM after %dms, try %d/%i\n", 4689 bssid, probe_wait_ms, 4690 ifmgd->probe_send_count, max_tries); 4691 ieee80211_mgd_probe_ap_send(sdata); 4692 } else { 4693 /* 4694 * We actually lost the connection ... or did we? 4695 * Let's make sure! 4696 */ 4697 mlme_dbg(sdata, 4698 "No probe response from AP %pM after %dms, disconnecting.\n", 4699 bssid, probe_wait_ms); 4700 4701 ieee80211_sta_connection_lost(sdata, bssid, 4702 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 4703 } 4704 } 4705 4706 sdata_unlock(sdata); 4707 } 4708 4709 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 4710 { 4711 struct ieee80211_sub_if_data *sdata = 4712 from_timer(sdata, t, u.mgd.bcn_mon_timer); 4713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4714 4715 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4716 return; 4717 4718 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 4719 return; 4720 4721 sdata->u.mgd.connection_loss = false; 4722 ieee80211_queue_work(&sdata->local->hw, 4723 &sdata->u.mgd.beacon_connection_loss_work); 4724 } 4725 4726 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 4727 { 4728 struct ieee80211_sub_if_data *sdata = 4729 from_timer(sdata, t, u.mgd.conn_mon_timer); 4730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4731 struct ieee80211_local *local = sdata->local; 4732 struct sta_info *sta; 4733 unsigned long timeout; 4734 4735 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 4736 return; 4737 4738 sta = sta_info_get(sdata, ifmgd->bssid); 4739 if (!sta) 4740 return; 4741 4742 timeout = sta->status_stats.last_ack; 4743 if (time_before(sta->status_stats.last_ack, sta->rx_stats.last_rx)) 4744 timeout = sta->rx_stats.last_rx; 4745 timeout += IEEE80211_CONNECTION_IDLE_TIME; 4746 4747 /* If timeout is after now, then update timer to fire at 4748 * the later date, but do not actually probe at this time. 4749 */ 4750 if (time_is_after_jiffies(timeout)) { 4751 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 4752 return; 4753 } 4754 4755 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4756 } 4757 4758 static void ieee80211_sta_monitor_work(struct work_struct *work) 4759 { 4760 struct ieee80211_sub_if_data *sdata = 4761 container_of(work, struct ieee80211_sub_if_data, 4762 u.mgd.monitor_work); 4763 4764 ieee80211_mgd_probe_ap(sdata, false); 4765 } 4766 4767 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4768 { 4769 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4770 __ieee80211_stop_poll(sdata); 4771 4772 /* let's probe the connection once */ 4773 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4774 ieee80211_queue_work(&sdata->local->hw, 4775 &sdata->u.mgd.monitor_work); 4776 } 4777 } 4778 4779 #ifdef CONFIG_PM 4780 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4781 { 4782 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4783 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4784 4785 sdata_lock(sdata); 4786 4787 if (ifmgd->auth_data || ifmgd->assoc_data) { 4788 const u8 *bssid = ifmgd->auth_data ? 4789 ifmgd->auth_data->bss->bssid : 4790 ifmgd->assoc_data->bss->bssid; 4791 4792 /* 4793 * If we are trying to authenticate / associate while suspending, 4794 * cfg80211 won't know and won't actually abort those attempts, 4795 * thus we need to do that ourselves. 4796 */ 4797 ieee80211_send_deauth_disassoc(sdata, bssid, bssid, 4798 IEEE80211_STYPE_DEAUTH, 4799 WLAN_REASON_DEAUTH_LEAVING, 4800 false, frame_buf); 4801 if (ifmgd->assoc_data) 4802 ieee80211_destroy_assoc_data(sdata, false, true); 4803 if (ifmgd->auth_data) 4804 ieee80211_destroy_auth_data(sdata, false); 4805 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4806 IEEE80211_DEAUTH_FRAME_LEN, 4807 false); 4808 } 4809 4810 /* This is a bit of a hack - we should find a better and more generic 4811 * solution to this. Normally when suspending, cfg80211 will in fact 4812 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4813 * auth (not so important) or assoc (this is the problem) process. 4814 * 4815 * As a consequence, it can happen that we are in the process of both 4816 * associating and suspending, and receive an association response 4817 * after cfg80211 has checked if it needs to disconnect, but before 4818 * we actually set the flag to drop incoming frames. This will then 4819 * cause the workqueue flush to process the association response in 4820 * the suspend, resulting in a successful association just before it 4821 * tries to remove the interface from the driver, which now though 4822 * has a channel context assigned ... this results in issues. 4823 * 4824 * To work around this (for now) simply deauth here again if we're 4825 * now connected. 4826 */ 4827 if (ifmgd->associated && !sdata->local->wowlan) { 4828 u8 bssid[ETH_ALEN]; 4829 struct cfg80211_deauth_request req = { 4830 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4831 .bssid = bssid, 4832 }; 4833 4834 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4835 ieee80211_mgd_deauth(sdata, &req); 4836 } 4837 4838 sdata_unlock(sdata); 4839 } 4840 4841 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4842 { 4843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4844 4845 sdata_lock(sdata); 4846 if (!ifmgd->associated) { 4847 sdata_unlock(sdata); 4848 return; 4849 } 4850 4851 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4852 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4853 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4854 ieee80211_sta_connection_lost(sdata, 4855 ifmgd->associated->bssid, 4856 WLAN_REASON_UNSPECIFIED, 4857 true); 4858 sdata_unlock(sdata); 4859 return; 4860 } 4861 sdata_unlock(sdata); 4862 } 4863 #endif 4864 4865 /* interface setup */ 4866 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4867 { 4868 struct ieee80211_if_managed *ifmgd; 4869 4870 ifmgd = &sdata->u.mgd; 4871 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4872 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4873 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4874 ieee80211_beacon_connection_loss_work); 4875 INIT_WORK(&ifmgd->csa_connection_drop_work, 4876 ieee80211_csa_connection_drop_work); 4877 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4878 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4879 ieee80211_tdls_peer_del_work); 4880 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 4881 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 4882 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 4883 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0); 4884 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4885 ieee80211_sta_handle_tspec_ac_params_wk); 4886 4887 ifmgd->flags = 0; 4888 ifmgd->powersave = sdata->wdev.ps; 4889 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4890 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4891 ifmgd->p2p_noa_index = -1; 4892 4893 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4894 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4895 else 4896 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4897 4898 /* Setup TDLS data */ 4899 spin_lock_init(&ifmgd->teardown_lock); 4900 ifmgd->teardown_skb = NULL; 4901 ifmgd->orig_teardown_skb = NULL; 4902 } 4903 4904 /* scan finished notification */ 4905 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4906 { 4907 struct ieee80211_sub_if_data *sdata; 4908 4909 /* Restart STA timers */ 4910 rcu_read_lock(); 4911 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4912 if (ieee80211_sdata_running(sdata)) 4913 ieee80211_restart_sta_timer(sdata); 4914 } 4915 rcu_read_unlock(); 4916 } 4917 4918 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4919 struct cfg80211_bss *cbss) 4920 { 4921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4922 const struct element *ht_cap_elem, *vht_cap_elem; 4923 const struct ieee80211_ht_cap *ht_cap; 4924 const struct ieee80211_vht_cap *vht_cap; 4925 u8 chains = 1; 4926 4927 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4928 return chains; 4929 4930 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4931 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4932 ht_cap = (void *)ht_cap_elem->data; 4933 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4934 /* 4935 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4936 * "Tx Unequal Modulation Supported" fields. 4937 */ 4938 } 4939 4940 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4941 return chains; 4942 4943 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4944 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4945 u8 nss; 4946 u16 tx_mcs_map; 4947 4948 vht_cap = (void *)vht_cap_elem->data; 4949 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4950 for (nss = 8; nss > 0; nss--) { 4951 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4952 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4953 break; 4954 } 4955 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4956 chains = max(chains, nss); 4957 } 4958 4959 return chains; 4960 } 4961 4962 static bool 4963 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 4964 struct ieee80211_supported_band *sband, 4965 const struct ieee80211_he_operation *he_op) 4966 { 4967 const struct ieee80211_sta_he_cap *sta_he_cap = 4968 ieee80211_get_he_iftype_cap(sband, 4969 ieee80211_vif_type_p2p(&sdata->vif)); 4970 u16 ap_min_req_set; 4971 int i; 4972 4973 if (!sta_he_cap || !he_op) 4974 return false; 4975 4976 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 4977 4978 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 4979 for (i = 0; i < 3; i++) { 4980 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 4981 &sta_he_cap->he_mcs_nss_supp; 4982 u16 sta_mcs_map_rx = 4983 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 4984 u16 sta_mcs_map_tx = 4985 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 4986 u8 nss; 4987 bool verified = true; 4988 4989 /* 4990 * For each band there is a maximum of 8 spatial streams 4991 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 4992 * of 2 bits per NSS (1-8), with the values defined in enum 4993 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 4994 * capabilities aren't less than the AP's minimum requirements 4995 * for this HE BSS per SS. 4996 * It is enough to find one such band that meets the reqs. 4997 */ 4998 for (nss = 8; nss > 0; nss--) { 4999 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 5000 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 5001 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 5002 5003 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 5004 continue; 5005 5006 /* 5007 * Make sure the HE AP doesn't require MCSs that aren't 5008 * supported by the client 5009 */ 5010 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5011 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 5012 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 5013 verified = false; 5014 break; 5015 } 5016 } 5017 5018 if (verified) 5019 return true; 5020 } 5021 5022 /* If here, STA doesn't meet AP's HE min requirements */ 5023 return false; 5024 } 5025 5026 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5027 struct cfg80211_bss *cbss) 5028 { 5029 struct ieee80211_local *local = sdata->local; 5030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5031 const struct ieee80211_ht_cap *ht_cap = NULL; 5032 const struct ieee80211_ht_operation *ht_oper = NULL; 5033 const struct ieee80211_vht_operation *vht_oper = NULL; 5034 const struct ieee80211_he_operation *he_oper = NULL; 5035 const struct ieee80211_s1g_oper_ie *s1g_oper = NULL; 5036 struct ieee80211_supported_band *sband; 5037 struct cfg80211_chan_def chandef; 5038 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5039 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5040 struct ieee80211_bss *bss = (void *)cbss->priv; 5041 struct ieee802_11_elems *elems; 5042 const struct cfg80211_bss_ies *ies; 5043 int ret; 5044 u32 i; 5045 bool have_80mhz; 5046 5047 rcu_read_lock(); 5048 5049 ies = rcu_dereference(cbss->ies); 5050 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5051 NULL, NULL); 5052 if (!elems) { 5053 rcu_read_unlock(); 5054 return -ENOMEM; 5055 } 5056 5057 sband = local->hw.wiphy->bands[cbss->channel->band]; 5058 5059 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 5060 IEEE80211_STA_DISABLE_80P80MHZ | 5061 IEEE80211_STA_DISABLE_160MHZ); 5062 5063 /* disable HT/VHT/HE if we don't support them */ 5064 if (!sband->ht_cap.ht_supported && !is_6ghz) { 5065 mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE\n"); 5066 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5067 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5068 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5069 } 5070 5071 if (!sband->vht_cap.vht_supported && is_5ghz) { 5072 mlme_dbg(sdata, "VHT not supported, disabling VHT/HE\n"); 5073 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5074 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5075 } 5076 5077 if (!ieee80211_get_he_iftype_cap(sband, 5078 ieee80211_vif_type_p2p(&sdata->vif))) { 5079 mlme_dbg(sdata, "HE not supported, disabling it\n"); 5080 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5081 } 5082 5083 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) { 5084 ht_oper = elems->ht_operation; 5085 ht_cap = elems->ht_cap_elem; 5086 5087 if (!ht_cap) { 5088 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5089 ht_oper = NULL; 5090 } 5091 } 5092 5093 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) { 5094 vht_oper = elems->vht_operation; 5095 if (vht_oper && !ht_oper) { 5096 vht_oper = NULL; 5097 sdata_info(sdata, 5098 "AP advertised VHT without HT, disabling HT/VHT/HE\n"); 5099 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5100 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5101 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5102 } 5103 5104 if (!elems->vht_cap_elem) { 5105 sdata_info(sdata, 5106 "bad VHT capabilities, disabling VHT\n"); 5107 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5108 vht_oper = NULL; 5109 } 5110 } 5111 5112 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { 5113 he_oper = elems->he_operation; 5114 5115 if (is_6ghz) { 5116 struct ieee80211_bss_conf *bss_conf; 5117 u8 i, j = 0; 5118 5119 bss_conf = &sdata->vif.bss_conf; 5120 5121 if (elems->pwr_constr_elem) 5122 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5123 5124 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5125 ARRAY_SIZE(elems->tx_pwr_env)); 5126 5127 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5128 if (elems->tx_pwr_env_len[i] > 5129 sizeof(bss_conf->tx_pwr_env[j])) 5130 continue; 5131 5132 bss_conf->tx_pwr_env_num++; 5133 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5134 elems->tx_pwr_env_len[i]); 5135 j++; 5136 } 5137 } 5138 5139 if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper)) 5140 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5141 } 5142 5143 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5144 have_80mhz = false; 5145 for (i = 0; i < sband->n_channels; i++) { 5146 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5147 IEEE80211_CHAN_NO_80MHZ)) 5148 continue; 5149 5150 have_80mhz = true; 5151 break; 5152 } 5153 5154 if (!have_80mhz) { 5155 sdata_info(sdata, "80 MHz not supported, disabling VHT\n"); 5156 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5157 } 5158 5159 if (sband->band == NL80211_BAND_S1GHZ) { 5160 s1g_oper = elems->s1g_oper; 5161 if (!s1g_oper) 5162 sdata_info(sdata, 5163 "AP missing S1G operation element?\n"); 5164 } 5165 5166 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 5167 cbss->channel, 5168 bss->vht_cap_info, 5169 ht_oper, vht_oper, he_oper, 5170 s1g_oper, 5171 &chandef, false); 5172 5173 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 5174 local->rx_chains); 5175 5176 rcu_read_unlock(); 5177 /* the element data was RCU protected so no longer valid anyway */ 5178 kfree(elems); 5179 elems = NULL; 5180 5181 if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) { 5182 sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection"); 5183 return -EINVAL; 5184 } 5185 5186 /* will change later if needed */ 5187 sdata->smps_mode = IEEE80211_SMPS_OFF; 5188 5189 mutex_lock(&local->mtx); 5190 /* 5191 * If this fails (possibly due to channel context sharing 5192 * on incompatible channels, e.g. 80+80 and 160 sharing the 5193 * same control channel) try to use a smaller bandwidth. 5194 */ 5195 ret = ieee80211_vif_use_channel(sdata, &chandef, 5196 IEEE80211_CHANCTX_SHARED); 5197 5198 /* don't downgrade for 5 and 10 MHz channels, though. */ 5199 if (chandef.width == NL80211_CHAN_WIDTH_5 || 5200 chandef.width == NL80211_CHAN_WIDTH_10) 5201 goto out; 5202 5203 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 5204 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 5205 ret = ieee80211_vif_use_channel(sdata, &chandef, 5206 IEEE80211_CHANCTX_SHARED); 5207 } 5208 out: 5209 mutex_unlock(&local->mtx); 5210 return ret; 5211 } 5212 5213 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5214 u8 *dtim_count, u8 *dtim_period) 5215 { 5216 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5217 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5218 ies->len); 5219 const struct ieee80211_tim_ie *tim = NULL; 5220 const struct ieee80211_bssid_index *idx; 5221 bool valid = tim_ie && tim_ie[1] >= 2; 5222 5223 if (valid) 5224 tim = (void *)(tim_ie + 2); 5225 5226 if (dtim_count) 5227 *dtim_count = valid ? tim->dtim_count : 0; 5228 5229 if (dtim_period) 5230 *dtim_period = valid ? tim->dtim_period : 0; 5231 5232 /* Check if value is overridden by non-transmitted profile */ 5233 if (!idx_ie || idx_ie[1] < 3) 5234 return valid; 5235 5236 idx = (void *)(idx_ie + 2); 5237 5238 if (dtim_count) 5239 *dtim_count = idx->dtim_count; 5240 5241 if (dtim_period) 5242 *dtim_period = idx->dtim_period; 5243 5244 return true; 5245 } 5246 5247 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 5248 struct cfg80211_bss *cbss, bool assoc, 5249 bool override) 5250 { 5251 struct ieee80211_local *local = sdata->local; 5252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5253 struct ieee80211_bss *bss = (void *)cbss->priv; 5254 struct sta_info *new_sta = NULL; 5255 struct ieee80211_supported_band *sband; 5256 bool have_sta = false; 5257 int err; 5258 5259 sband = local->hw.wiphy->bands[cbss->channel->band]; 5260 5261 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 5262 return -EINVAL; 5263 5264 /* If a reconfig is happening, bail out */ 5265 if (local->in_reconfig) 5266 return -EBUSY; 5267 5268 if (assoc) { 5269 rcu_read_lock(); 5270 have_sta = sta_info_get(sdata, cbss->bssid); 5271 rcu_read_unlock(); 5272 } 5273 5274 if (!have_sta) { 5275 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 5276 if (!new_sta) 5277 return -ENOMEM; 5278 } 5279 5280 /* 5281 * Set up the information for the new channel before setting the 5282 * new channel. We can't - completely race-free - change the basic 5283 * rates bitmap and the channel (sband) that it refers to, but if 5284 * we set it up before we at least avoid calling into the driver's 5285 * bss_info_changed() method with invalid information (since we do 5286 * call that from changing the channel - only for IDLE and perhaps 5287 * some others, but ...). 5288 * 5289 * So to avoid that, just set up all the new information before the 5290 * channel, but tell the driver to apply it only afterwards, since 5291 * it might need the new channel for that. 5292 */ 5293 if (new_sta) { 5294 u32 rates = 0, basic_rates = 0; 5295 bool have_higher_than_11mbit = false; 5296 int min_rate = INT_MAX, min_rate_index = -1; 5297 const struct cfg80211_bss_ies *ies; 5298 int shift = ieee80211_vif_get_shift(&sdata->vif); 5299 5300 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5301 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5302 ieee80211_s1g_sta_rate_init(new_sta); 5303 goto skip_rates; 5304 } 5305 5306 ieee80211_get_rates(sband, bss->supp_rates, 5307 bss->supp_rates_len, 5308 &rates, &basic_rates, 5309 &have_higher_than_11mbit, 5310 &min_rate, &min_rate_index, 5311 shift); 5312 5313 /* 5314 * This used to be a workaround for basic rates missing 5315 * in the association response frame. Now that we no 5316 * longer use the basic rates from there, it probably 5317 * doesn't happen any more, but keep the workaround so 5318 * in case some *other* APs are buggy in different ways 5319 * we can connect -- with a warning. 5320 * Allow this workaround only in case the AP provided at least 5321 * one rate. 5322 */ 5323 if (min_rate_index < 0) { 5324 sdata_info(sdata, 5325 "No legacy rates in association response\n"); 5326 5327 sta_info_free(local, new_sta); 5328 return -EINVAL; 5329 } else if (!basic_rates) { 5330 sdata_info(sdata, 5331 "No basic rates, using min rate instead\n"); 5332 basic_rates = BIT(min_rate_index); 5333 } 5334 5335 if (rates) 5336 new_sta->sta.supp_rates[cbss->channel->band] = rates; 5337 else 5338 sdata_info(sdata, 5339 "No rates found, keeping mandatory only\n"); 5340 5341 sdata->vif.bss_conf.basic_rates = basic_rates; 5342 5343 /* cf. IEEE 802.11 9.2.12 */ 5344 if (cbss->channel->band == NL80211_BAND_2GHZ && 5345 have_higher_than_11mbit) 5346 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 5347 else 5348 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 5349 5350 skip_rates: 5351 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 5352 5353 /* set timing information */ 5354 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 5355 rcu_read_lock(); 5356 ies = rcu_dereference(cbss->beacon_ies); 5357 if (ies) { 5358 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5359 sdata->vif.bss_conf.sync_device_ts = 5360 bss->device_ts_beacon; 5361 5362 ieee80211_get_dtim(ies, 5363 &sdata->vif.bss_conf.sync_dtim_count, 5364 NULL); 5365 } else if (!ieee80211_hw_check(&sdata->local->hw, 5366 TIMING_BEACON_ONLY)) { 5367 ies = rcu_dereference(cbss->proberesp_ies); 5368 /* must be non-NULL since beacon IEs were NULL */ 5369 sdata->vif.bss_conf.sync_tsf = ies->tsf; 5370 sdata->vif.bss_conf.sync_device_ts = 5371 bss->device_ts_presp; 5372 sdata->vif.bss_conf.sync_dtim_count = 0; 5373 } else { 5374 sdata->vif.bss_conf.sync_tsf = 0; 5375 sdata->vif.bss_conf.sync_device_ts = 0; 5376 sdata->vif.bss_conf.sync_dtim_count = 0; 5377 } 5378 rcu_read_unlock(); 5379 } 5380 5381 if (new_sta || override) { 5382 err = ieee80211_prep_channel(sdata, cbss); 5383 if (err) { 5384 if (new_sta) 5385 sta_info_free(local, new_sta); 5386 return -EINVAL; 5387 } 5388 } 5389 5390 if (new_sta) { 5391 /* 5392 * tell driver about BSSID, basic rates and timing 5393 * this was set up above, before setting the channel 5394 */ 5395 ieee80211_bss_info_change_notify(sdata, 5396 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 5397 BSS_CHANGED_BEACON_INT); 5398 5399 if (assoc) 5400 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 5401 5402 err = sta_info_insert(new_sta); 5403 new_sta = NULL; 5404 if (err) { 5405 sdata_info(sdata, 5406 "failed to insert STA entry for the AP (error %d)\n", 5407 err); 5408 return err; 5409 } 5410 } else 5411 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 5412 5413 /* Cancel scan to ensure that nothing interferes with connection */ 5414 if (local->scanning) 5415 ieee80211_scan_cancel(local); 5416 5417 return 0; 5418 } 5419 5420 /* config hooks */ 5421 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 5422 struct cfg80211_auth_request *req) 5423 { 5424 struct ieee80211_local *local = sdata->local; 5425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5426 struct ieee80211_mgd_auth_data *auth_data; 5427 u16 auth_alg; 5428 int err; 5429 bool cont_auth; 5430 5431 /* prepare auth data structure */ 5432 5433 switch (req->auth_type) { 5434 case NL80211_AUTHTYPE_OPEN_SYSTEM: 5435 auth_alg = WLAN_AUTH_OPEN; 5436 break; 5437 case NL80211_AUTHTYPE_SHARED_KEY: 5438 if (fips_enabled) 5439 return -EOPNOTSUPP; 5440 auth_alg = WLAN_AUTH_SHARED_KEY; 5441 break; 5442 case NL80211_AUTHTYPE_FT: 5443 auth_alg = WLAN_AUTH_FT; 5444 break; 5445 case NL80211_AUTHTYPE_NETWORK_EAP: 5446 auth_alg = WLAN_AUTH_LEAP; 5447 break; 5448 case NL80211_AUTHTYPE_SAE: 5449 auth_alg = WLAN_AUTH_SAE; 5450 break; 5451 case NL80211_AUTHTYPE_FILS_SK: 5452 auth_alg = WLAN_AUTH_FILS_SK; 5453 break; 5454 case NL80211_AUTHTYPE_FILS_SK_PFS: 5455 auth_alg = WLAN_AUTH_FILS_SK_PFS; 5456 break; 5457 case NL80211_AUTHTYPE_FILS_PK: 5458 auth_alg = WLAN_AUTH_FILS_PK; 5459 break; 5460 default: 5461 return -EOPNOTSUPP; 5462 } 5463 5464 if (ifmgd->assoc_data) 5465 return -EBUSY; 5466 5467 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 5468 req->ie_len, GFP_KERNEL); 5469 if (!auth_data) 5470 return -ENOMEM; 5471 5472 auth_data->bss = req->bss; 5473 5474 if (req->auth_data_len >= 4) { 5475 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 5476 __le16 *pos = (__le16 *) req->auth_data; 5477 5478 auth_data->sae_trans = le16_to_cpu(pos[0]); 5479 auth_data->sae_status = le16_to_cpu(pos[1]); 5480 } 5481 memcpy(auth_data->data, req->auth_data + 4, 5482 req->auth_data_len - 4); 5483 auth_data->data_len += req->auth_data_len - 4; 5484 } 5485 5486 /* Check if continuing authentication or trying to authenticate with the 5487 * same BSS that we were in the process of authenticating with and avoid 5488 * removal and re-addition of the STA entry in 5489 * ieee80211_prep_connection(). 5490 */ 5491 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss; 5492 5493 if (req->ie && req->ie_len) { 5494 memcpy(&auth_data->data[auth_data->data_len], 5495 req->ie, req->ie_len); 5496 auth_data->data_len += req->ie_len; 5497 } 5498 5499 if (req->key && req->key_len) { 5500 auth_data->key_len = req->key_len; 5501 auth_data->key_idx = req->key_idx; 5502 memcpy(auth_data->key, req->key, req->key_len); 5503 } 5504 5505 auth_data->algorithm = auth_alg; 5506 5507 /* try to authenticate/probe */ 5508 5509 if (ifmgd->auth_data) { 5510 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 5511 auth_data->peer_confirmed = 5512 ifmgd->auth_data->peer_confirmed; 5513 } 5514 ieee80211_destroy_auth_data(sdata, cont_auth); 5515 } 5516 5517 /* prep auth_data so we don't go into idle on disassoc */ 5518 ifmgd->auth_data = auth_data; 5519 5520 /* If this is continuation of an ongoing SAE authentication exchange 5521 * (i.e., request to send SAE Confirm) and the peer has already 5522 * confirmed, mark authentication completed since we are about to send 5523 * out SAE Confirm. 5524 */ 5525 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 5526 auth_data->peer_confirmed && auth_data->sae_trans == 2) 5527 ieee80211_mark_sta_auth(sdata, req->bss->bssid); 5528 5529 if (ifmgd->associated) { 5530 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5531 5532 sdata_info(sdata, 5533 "disconnect from AP %pM for new auth to %pM\n", 5534 ifmgd->associated->bssid, req->bss->bssid); 5535 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5536 WLAN_REASON_UNSPECIFIED, 5537 false, frame_buf); 5538 5539 ieee80211_report_disconnect(sdata, frame_buf, 5540 sizeof(frame_buf), true, 5541 WLAN_REASON_UNSPECIFIED, 5542 false); 5543 } 5544 5545 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 5546 5547 err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false); 5548 if (err) 5549 goto err_clear; 5550 5551 err = ieee80211_auth(sdata); 5552 if (err) { 5553 sta_info_destroy_addr(sdata, req->bss->bssid); 5554 goto err_clear; 5555 } 5556 5557 /* hold our own reference */ 5558 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 5559 return 0; 5560 5561 err_clear: 5562 eth_zero_addr(ifmgd->bssid); 5563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5564 ifmgd->auth_data = NULL; 5565 mutex_lock(&sdata->local->mtx); 5566 ieee80211_vif_release_channel(sdata); 5567 mutex_unlock(&sdata->local->mtx); 5568 kfree(auth_data); 5569 return err; 5570 } 5571 5572 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 5573 struct cfg80211_assoc_request *req) 5574 { 5575 bool is_6ghz = req->bss->channel->band == NL80211_BAND_6GHZ; 5576 bool is_5ghz = req->bss->channel->band == NL80211_BAND_5GHZ; 5577 struct ieee80211_local *local = sdata->local; 5578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5579 struct ieee80211_bss *bss = (void *)req->bss->priv; 5580 struct ieee80211_mgd_assoc_data *assoc_data; 5581 const struct cfg80211_bss_ies *beacon_ies; 5582 struct ieee80211_supported_band *sband; 5583 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 5584 const struct element *ssid_elem, *ht_elem, *vht_elem; 5585 int i, err; 5586 bool override = false; 5587 5588 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 5589 if (!assoc_data) 5590 return -ENOMEM; 5591 5592 rcu_read_lock(); 5593 ssid_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_SSID); 5594 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 5595 rcu_read_unlock(); 5596 kfree(assoc_data); 5597 return -EINVAL; 5598 } 5599 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 5600 assoc_data->ssid_len = ssid_elem->datalen; 5601 memcpy(bss_conf->ssid, assoc_data->ssid, assoc_data->ssid_len); 5602 bss_conf->ssid_len = assoc_data->ssid_len; 5603 rcu_read_unlock(); 5604 5605 if (ifmgd->associated) { 5606 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5607 5608 sdata_info(sdata, 5609 "disconnect from AP %pM for new assoc to %pM\n", 5610 ifmgd->associated->bssid, req->bss->bssid); 5611 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5612 WLAN_REASON_UNSPECIFIED, 5613 false, frame_buf); 5614 5615 ieee80211_report_disconnect(sdata, frame_buf, 5616 sizeof(frame_buf), true, 5617 WLAN_REASON_UNSPECIFIED, 5618 false); 5619 } 5620 5621 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 5622 err = -EBUSY; 5623 goto err_free; 5624 } 5625 5626 if (ifmgd->assoc_data) { 5627 err = -EBUSY; 5628 goto err_free; 5629 } 5630 5631 if (ifmgd->auth_data) { 5632 bool match; 5633 5634 /* keep sta info, bssid if matching */ 5635 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 5636 ieee80211_destroy_auth_data(sdata, match); 5637 } 5638 5639 /* prepare assoc data */ 5640 5641 ifmgd->beacon_crc_valid = false; 5642 5643 assoc_data->wmm = bss->wmm_used && 5644 (local->hw.queues >= IEEE80211_NUM_ACS); 5645 5646 /* 5647 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 5648 * We still associate in non-HT mode (11a/b/g) if any one of these 5649 * ciphers is configured as pairwise. 5650 * We can set this to true for non-11n hardware, that'll be checked 5651 * separately along with the peer capabilities. 5652 */ 5653 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5654 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5655 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5656 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5657 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5658 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5659 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5660 netdev_info(sdata->dev, 5661 "disabling HT/VHT/HE due to WEP/TKIP use\n"); 5662 } 5663 } 5664 5665 sband = local->hw.wiphy->bands[req->bss->channel->band]; 5666 5667 /* also disable HT/VHT/HE if the AP doesn't use WMM */ 5668 if (!bss->wmm_used) { 5669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5671 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5672 netdev_info(sdata->dev, 5673 "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); 5674 } 5675 5676 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 5677 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 5678 sizeof(ifmgd->ht_capa_mask)); 5679 5680 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 5681 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 5682 sizeof(ifmgd->vht_capa_mask)); 5683 5684 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 5685 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 5686 sizeof(ifmgd->s1g_capa_mask)); 5687 5688 if (req->ie && req->ie_len) { 5689 memcpy(assoc_data->ie, req->ie, req->ie_len); 5690 assoc_data->ie_len = req->ie_len; 5691 } 5692 5693 if (req->fils_kek) { 5694 /* should already be checked in cfg80211 - so warn */ 5695 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 5696 err = -EINVAL; 5697 goto err_free; 5698 } 5699 memcpy(assoc_data->fils_kek, req->fils_kek, 5700 req->fils_kek_len); 5701 assoc_data->fils_kek_len = req->fils_kek_len; 5702 } 5703 5704 if (req->fils_nonces) 5705 memcpy(assoc_data->fils_nonces, req->fils_nonces, 5706 2 * FILS_NONCE_LEN); 5707 5708 assoc_data->bss = req->bss; 5709 assoc_data->capability = req->bss->capability; 5710 assoc_data->supp_rates = bss->supp_rates; 5711 assoc_data->supp_rates_len = bss->supp_rates_len; 5712 5713 rcu_read_lock(); 5714 ht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_HT_OPERATION); 5715 if (ht_elem && ht_elem->datalen >= sizeof(struct ieee80211_ht_operation)) 5716 assoc_data->ap_ht_param = 5717 ((struct ieee80211_ht_operation *)(ht_elem->data))->ht_param; 5718 else if (!is_6ghz) 5719 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5720 vht_elem = ieee80211_bss_get_elem(req->bss, WLAN_EID_VHT_CAPABILITY); 5721 if (vht_elem && vht_elem->datalen >= sizeof(struct ieee80211_vht_cap)) { 5722 memcpy(&assoc_data->ap_vht_cap, vht_elem->data, 5723 sizeof(struct ieee80211_vht_cap)); 5724 } else if (is_5ghz) { 5725 sdata_info(sdata, "VHT capa missing/short, disabling VHT/HE\n"); 5726 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT | 5727 IEEE80211_STA_DISABLE_HE; 5728 } 5729 rcu_read_unlock(); 5730 5731 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 5732 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 5733 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 5734 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 5735 5736 if (bss->wmm_used && bss->uapsd_supported && 5737 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 5738 assoc_data->uapsd = true; 5739 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 5740 } else { 5741 assoc_data->uapsd = false; 5742 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 5743 } 5744 5745 if (req->prev_bssid) 5746 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 5747 5748 if (req->use_mfp) { 5749 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 5750 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 5751 } else { 5752 ifmgd->mfp = IEEE80211_MFP_DISABLED; 5753 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 5754 } 5755 5756 if (req->flags & ASSOC_REQ_USE_RRM) 5757 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 5758 else 5759 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 5760 5761 if (req->crypto.control_port) 5762 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 5763 else 5764 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 5765 5766 sdata->control_port_protocol = req->crypto.control_port_ethertype; 5767 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 5768 sdata->control_port_over_nl80211 = 5769 req->crypto.control_port_over_nl80211; 5770 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 5771 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 5772 sdata->vif.type); 5773 5774 /* kick off associate process */ 5775 5776 ifmgd->assoc_data = assoc_data; 5777 ifmgd->dtim_period = 0; 5778 ifmgd->have_beacon = false; 5779 5780 /* override HT/VHT configuration only if the AP and we support it */ 5781 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 5782 struct ieee80211_sta_ht_cap sta_ht_cap; 5783 5784 if (req->flags & ASSOC_REQ_DISABLE_HT) 5785 override = true; 5786 5787 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 5788 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5789 5790 /* check for 40 MHz disable override */ 5791 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 5792 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 5793 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 5794 override = true; 5795 5796 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 5797 req->flags & ASSOC_REQ_DISABLE_VHT) 5798 override = true; 5799 } 5800 5801 if (req->flags & ASSOC_REQ_DISABLE_HT) { 5802 mlme_dbg(sdata, "HT disabled by flag, disabling HT/VHT/HE\n"); 5803 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 5804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5805 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5806 } 5807 5808 if (req->flags & ASSOC_REQ_DISABLE_VHT) { 5809 mlme_dbg(sdata, "VHT disabled by flag, disabling VHT\n"); 5810 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 5811 } 5812 5813 if (req->flags & ASSOC_REQ_DISABLE_HE) { 5814 mlme_dbg(sdata, "HE disabled by flag, disabling VHT\n"); 5815 ifmgd->flags |= IEEE80211_STA_DISABLE_HE; 5816 } 5817 5818 err = ieee80211_prep_connection(sdata, req->bss, true, override); 5819 if (err) 5820 goto err_clear; 5821 5822 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 5823 if (ifmgd->powersave) 5824 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 5825 else 5826 sdata->smps_mode = IEEE80211_SMPS_OFF; 5827 } else { 5828 sdata->smps_mode = ifmgd->req_smps; 5829 } 5830 5831 rcu_read_lock(); 5832 beacon_ies = rcu_dereference(req->bss->beacon_ies); 5833 5834 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 5835 !beacon_ies) { 5836 /* 5837 * Wait up to one beacon interval ... 5838 * should this be more if we miss one? 5839 */ 5840 sdata_info(sdata, "waiting for beacon from %pM\n", 5841 ifmgd->bssid); 5842 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 5843 assoc_data->timeout_started = true; 5844 assoc_data->need_beacon = true; 5845 } else if (beacon_ies) { 5846 const struct element *elem; 5847 u8 dtim_count = 0; 5848 5849 ieee80211_get_dtim(beacon_ies, &dtim_count, 5850 &ifmgd->dtim_period); 5851 5852 ifmgd->have_beacon = true; 5853 assoc_data->timeout = jiffies; 5854 assoc_data->timeout_started = true; 5855 5856 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 5857 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 5858 sdata->vif.bss_conf.sync_device_ts = 5859 bss->device_ts_beacon; 5860 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 5861 } 5862 5863 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 5864 beacon_ies->data, beacon_ies->len); 5865 if (elem && elem->datalen >= 3) 5866 sdata->vif.bss_conf.profile_periodicity = elem->data[2]; 5867 else 5868 sdata->vif.bss_conf.profile_periodicity = 0; 5869 5870 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 5871 beacon_ies->data, beacon_ies->len); 5872 if (elem && elem->datalen >= 11 && 5873 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 5874 sdata->vif.bss_conf.ema_ap = true; 5875 else 5876 sdata->vif.bss_conf.ema_ap = false; 5877 } else { 5878 assoc_data->timeout = jiffies; 5879 assoc_data->timeout_started = true; 5880 } 5881 rcu_read_unlock(); 5882 5883 run_again(sdata, assoc_data->timeout); 5884 5885 if (bss->corrupt_data) { 5886 char *corrupt_type = "data"; 5887 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 5888 if (bss->corrupt_data & 5889 IEEE80211_BSS_CORRUPT_PROBE_RESP) 5890 corrupt_type = "beacon and probe response"; 5891 else 5892 corrupt_type = "beacon"; 5893 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 5894 corrupt_type = "probe response"; 5895 sdata_info(sdata, "associating with AP with corrupt %s\n", 5896 corrupt_type); 5897 } 5898 5899 return 0; 5900 err_clear: 5901 eth_zero_addr(ifmgd->bssid); 5902 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 5903 ifmgd->assoc_data = NULL; 5904 err_free: 5905 kfree(assoc_data); 5906 return err; 5907 } 5908 5909 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 5910 struct cfg80211_deauth_request *req) 5911 { 5912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5913 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5914 bool tx = !req->local_state_change; 5915 struct ieee80211_prep_tx_info info = { 5916 .subtype = IEEE80211_STYPE_DEAUTH, 5917 }; 5918 5919 if (ifmgd->auth_data && 5920 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 5921 sdata_info(sdata, 5922 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 5923 req->bssid, req->reason_code, 5924 ieee80211_get_reason_code_string(req->reason_code)); 5925 5926 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5927 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5928 IEEE80211_STYPE_DEAUTH, 5929 req->reason_code, tx, 5930 frame_buf); 5931 ieee80211_destroy_auth_data(sdata, false); 5932 ieee80211_report_disconnect(sdata, frame_buf, 5933 sizeof(frame_buf), true, 5934 req->reason_code, false); 5935 drv_mgd_complete_tx(sdata->local, sdata, &info); 5936 return 0; 5937 } 5938 5939 if (ifmgd->assoc_data && 5940 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 5941 sdata_info(sdata, 5942 "aborting association with %pM by local choice (Reason: %u=%s)\n", 5943 req->bssid, req->reason_code, 5944 ieee80211_get_reason_code_string(req->reason_code)); 5945 5946 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5947 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 5948 IEEE80211_STYPE_DEAUTH, 5949 req->reason_code, tx, 5950 frame_buf); 5951 ieee80211_destroy_assoc_data(sdata, false, true); 5952 ieee80211_report_disconnect(sdata, frame_buf, 5953 sizeof(frame_buf), true, 5954 req->reason_code, false); 5955 return 0; 5956 } 5957 5958 if (ifmgd->associated && 5959 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 5960 sdata_info(sdata, 5961 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 5962 req->bssid, req->reason_code, 5963 ieee80211_get_reason_code_string(req->reason_code)); 5964 5965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5966 req->reason_code, tx, frame_buf); 5967 ieee80211_report_disconnect(sdata, frame_buf, 5968 sizeof(frame_buf), true, 5969 req->reason_code, false); 5970 drv_mgd_complete_tx(sdata->local, sdata, &info); 5971 return 0; 5972 } 5973 5974 return -ENOTCONN; 5975 } 5976 5977 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 5978 struct cfg80211_disassoc_request *req) 5979 { 5980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5981 u8 bssid[ETH_ALEN]; 5982 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5983 5984 /* 5985 * cfg80211 should catch this ... but it's racy since 5986 * we can receive a disassoc frame, process it, hand it 5987 * to cfg80211 while that's in a locked section already 5988 * trying to tell us that the user wants to disconnect. 5989 */ 5990 if (ifmgd->associated != req->bss) 5991 return -ENOLINK; 5992 5993 sdata_info(sdata, 5994 "disassociating from %pM by local choice (Reason: %u=%s)\n", 5995 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 5996 5997 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5998 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5999 req->reason_code, !req->local_state_change, 6000 frame_buf); 6001 6002 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6003 req->reason_code, false); 6004 6005 return 0; 6006 } 6007 6008 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 6009 { 6010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6011 6012 /* 6013 * Make sure some work items will not run after this, 6014 * they will not do anything but might not have been 6015 * cancelled when disconnecting. 6016 */ 6017 cancel_work_sync(&ifmgd->monitor_work); 6018 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 6019 cancel_work_sync(&ifmgd->request_smps_work); 6020 cancel_work_sync(&ifmgd->csa_connection_drop_work); 6021 cancel_work_sync(&ifmgd->chswitch_work); 6022 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 6023 6024 sdata_lock(sdata); 6025 if (ifmgd->assoc_data) { 6026 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 6027 ieee80211_destroy_assoc_data(sdata, false, false); 6028 cfg80211_assoc_timeout(sdata->dev, bss); 6029 } 6030 if (ifmgd->auth_data) 6031 ieee80211_destroy_auth_data(sdata, false); 6032 spin_lock_bh(&ifmgd->teardown_lock); 6033 if (ifmgd->teardown_skb) { 6034 kfree_skb(ifmgd->teardown_skb); 6035 ifmgd->teardown_skb = NULL; 6036 ifmgd->orig_teardown_skb = NULL; 6037 } 6038 kfree(ifmgd->assoc_req_ies); 6039 ifmgd->assoc_req_ies = NULL; 6040 ifmgd->assoc_req_ies_len = 0; 6041 spin_unlock_bh(&ifmgd->teardown_lock); 6042 del_timer_sync(&ifmgd->timer); 6043 sdata_unlock(sdata); 6044 } 6045 6046 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 6047 enum nl80211_cqm_rssi_threshold_event rssi_event, 6048 s32 rssi_level, 6049 gfp_t gfp) 6050 { 6051 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6052 6053 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 6054 6055 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 6056 } 6057 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 6058 6059 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 6060 { 6061 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6062 6063 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 6064 6065 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 6066 } 6067 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 6068