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 - 2026 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 <linux/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 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 153 const struct cfg80211_chan_def *chandef, 154 u32 prohibited_flags) 155 { 156 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 157 chandef, prohibited_flags)) 158 return false; 159 160 if (chandef->punctured && 161 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 162 return false; 163 164 return true; 165 } 166 167 struct ieee80211_determine_ap_chan_data { 168 /* input data */ 169 struct ieee80211_channel *channel; 170 const struct ieee802_11_elems *elems; 171 const struct ieee80211_conn_settings *conn; 172 u32 vht_cap_info; 173 bool ignore_ht_channel_mismatch; 174 const struct cfg80211_chan_def *cur_chandef; 175 bool cur_dbe_used; 176 177 /* target chandef is filled in */ 178 struct cfg80211_chan_def *chandef; 179 }; 180 181 struct ieee80211_determine_ap_chan_output { 182 /* filled to indicate UHR DBE was used */ 183 bool dbe_used; 184 /* and need to know non-DBE width */ 185 enum nl80211_chan_width non_dbe_width; 186 }; 187 188 static enum ieee80211_conn_mode 189 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 190 const struct ieee80211_determine_ap_chan_data *data, 191 struct ieee80211_determine_ap_chan_output *out) 192 { 193 bool ignore_ht_channel_mismatch = data->ignore_ht_channel_mismatch; 194 const struct ieee802_11_elems *elems = data->elems; 195 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 196 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 197 const struct ieee80211_he_operation *he_oper = elems->he_operation; 198 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 199 const struct ieee80211_uhr_operation *uhr_oper = elems->uhr_operation; 200 const struct ieee80211_conn_settings *conn = data->conn; 201 struct ieee80211_channel *channel = data->channel; 202 struct cfg80211_chan_def *chandef = data->chandef; 203 struct ieee80211_supported_band *sband = 204 sdata->local->hw.wiphy->bands[channel->band]; 205 struct cfg80211_chan_def vht_chandef; 206 bool no_vht = false; 207 u32 ht_cfreq; 208 209 memset(out, 0, sizeof(*out)); 210 211 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 212 ignore_ht_channel_mismatch = false; 213 214 *chandef = (struct cfg80211_chan_def) { 215 .chan = channel, 216 .width = NL80211_CHAN_WIDTH_20_NOHT, 217 .center_freq1 = channel->center_freq, 218 .freq1_offset = channel->freq_offset, 219 }; 220 221 /* get special S1G case out of the way */ 222 if (sband->band == NL80211_BAND_S1GHZ) { 223 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 224 chandef)) { 225 /* Fallback to default 1MHz */ 226 chandef->width = NL80211_CHAN_WIDTH_1; 227 chandef->s1g_primary_2mhz = false; 228 } 229 230 return IEEE80211_CONN_MODE_S1G; 231 } 232 233 /* get special 6 GHz case out of the way */ 234 if (sband->band == NL80211_BAND_6GHZ) { 235 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_HIGHEST; 236 237 /* this is an error */ 238 if (conn->mode < IEEE80211_CONN_MODE_HE) 239 return IEEE80211_CONN_MODE_LEGACY; 240 241 if (!elems->he_6ghz_capa || !elems->he_cap) { 242 sdata_info(sdata, 243 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 if (!eht_oper || !elems->eht_cap) { 248 eht_oper = NULL; 249 mode = IEEE80211_CONN_MODE_HE; 250 } 251 252 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 253 eht_oper, chandef)) { 254 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 255 return IEEE80211_CONN_MODE_LEGACY; 256 } 257 258 if (eht_oper && ieee80211_hw_check(&sdata->local->hw, STRICT)) { 259 struct cfg80211_chan_def he_chandef = *chandef; 260 261 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, 262 he_oper, NULL, 263 &he_chandef)) { 264 sdata_info(sdata, 265 "bad HE operation in EHT AP\n"); 266 return IEEE80211_CONN_MODE_LEGACY; 267 } 268 269 if (!cfg80211_chandef_compatible(chandef, 270 &he_chandef)) { 271 sdata_info(sdata, "HE/EHT incompatible\n"); 272 return IEEE80211_CONN_MODE_LEGACY; 273 } 274 } 275 276 if (mode <= IEEE80211_CONN_MODE_EHT) 277 return mode; 278 goto check_uhr; 279 } 280 281 /* now we have the progression HT, VHT, ... */ 282 if (conn->mode < IEEE80211_CONN_MODE_HT) 283 return IEEE80211_CONN_MODE_LEGACY; 284 285 if (!ht_oper || !elems->ht_cap_elem) 286 return IEEE80211_CONN_MODE_LEGACY; 287 288 chandef->width = NL80211_CHAN_WIDTH_20; 289 290 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 291 channel->band); 292 /* check that channel matches the right operating channel */ 293 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 294 /* 295 * It's possible that some APs are confused here; 296 * Netgear WNDR3700 sometimes reports 4 higher than 297 * the actual channel in association responses, but 298 * since we look at probe response/beacon data here 299 * it should be OK. 300 */ 301 sdata_info(sdata, 302 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 303 channel->center_freq, ht_cfreq, 304 ht_oper->primary_chan, channel->band); 305 return IEEE80211_CONN_MODE_LEGACY; 306 } 307 308 ieee80211_chandef_ht_oper(ht_oper, chandef); 309 310 if (conn->mode < IEEE80211_CONN_MODE_VHT) 311 return IEEE80211_CONN_MODE_HT; 312 313 vht_chandef = *chandef; 314 315 /* 316 * having he_cap/he_oper parsed out implies we're at 317 * least operating as HE STA 318 */ 319 if (elems->he_cap && he_oper && 320 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 321 struct ieee80211_vht_operation he_oper_vht_cap; 322 323 /* 324 * Set only first 3 bytes (other 2 aren't used in 325 * ieee80211_chandef_vht_oper() anyway) 326 */ 327 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 328 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 329 330 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, data->vht_cap_info, 331 &he_oper_vht_cap, ht_oper, 332 &vht_chandef)) { 333 sdata_info(sdata, 334 "HE AP VHT information is invalid, disabling HE\n"); 335 /* this will cause us to re-parse as VHT STA */ 336 return IEEE80211_CONN_MODE_VHT; 337 } 338 } else if (!vht_oper || !elems->vht_cap_elem) { 339 if (sband->band == NL80211_BAND_5GHZ) 340 return IEEE80211_CONN_MODE_HT; 341 no_vht = true; 342 } else if (sband->band == NL80211_BAND_2GHZ) { 343 no_vht = true; 344 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 345 data->vht_cap_info, 346 vht_oper, ht_oper, 347 &vht_chandef)) { 348 sdata_info(sdata, 349 "AP VHT information is invalid, disabling VHT\n"); 350 return IEEE80211_CONN_MODE_HT; 351 } 352 353 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 354 sdata_info(sdata, 355 "AP VHT information doesn't match HT, disabling VHT\n"); 356 return IEEE80211_CONN_MODE_HT; 357 } 358 359 *chandef = vht_chandef; 360 361 /* stick to current max mode if we or the AP don't have HE */ 362 if (conn->mode < IEEE80211_CONN_MODE_HE || 363 !elems->he_operation || !elems->he_cap) { 364 if (no_vht) 365 return IEEE80211_CONN_MODE_HT; 366 return IEEE80211_CONN_MODE_VHT; 367 } 368 369 /* stick to HE if we or the AP don't have EHT */ 370 if (conn->mode < IEEE80211_CONN_MODE_EHT || 371 !eht_oper || !elems->eht_cap) 372 return IEEE80211_CONN_MODE_HE; 373 374 /* 375 * handle the case that the EHT operation indicates that it holds EHT 376 * operation information (in case that the channel width differs from 377 * the channel width reported in HT/VHT/HE). 378 */ 379 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 380 struct cfg80211_chan_def eht_chandef = *chandef; 381 382 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 383 &eht_chandef); 384 385 eht_chandef.punctured = 386 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 387 388 if (!cfg80211_chandef_valid(&eht_chandef)) { 389 sdata_info(sdata, 390 "AP EHT information is invalid, disabling EHT\n"); 391 return IEEE80211_CONN_MODE_HE; 392 } 393 394 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 395 sdata_info(sdata, 396 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 397 return IEEE80211_CONN_MODE_HE; 398 } 399 400 *chandef = eht_chandef; 401 } 402 403 check_uhr: 404 if (conn->mode < IEEE80211_CONN_MODE_UHR || !uhr_oper || !elems->ml_basic) 405 return IEEE80211_CONN_MODE_EHT; 406 407 if (elems->frame_type != (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON)) { 408 struct cfg80211_chan_def npca_chandef = *chandef; 409 const struct ieee80211_sta_uhr_cap *uhr_cap; 410 const struct ieee80211_uhr_npca_info *npca; 411 const struct ieee80211_uhr_dbe_info *dbe; 412 struct cfg80211_chan_def dbe_chandef; 413 414 /* frames other than beacons carry UHR capability too */ 415 if (!elems->uhr_cap) 416 return IEEE80211_CONN_MODE_EHT; 417 418 npca = ieee80211_uhr_npca_info(uhr_oper); 419 420 if (npca && !(elems->uhr_cap->mac.mac_cap[0] & 421 IEEE80211_UHR_MAC_CAP0_NPCA_SUPP)) { 422 sdata_info(sdata, 423 "AP without UHR NPCA capability uses it, disabling UHR\n"); 424 return IEEE80211_CONN_MODE_EHT; 425 } 426 427 /* DBE is not considered yet, so this works */ 428 if (!cfg80211_chandef_npca_valid(sdata->local->hw.wiphy, 429 &npca_chandef, npca) || 430 cfg80211_chandef_add_npca(sdata->local->hw.wiphy, 431 &npca_chandef, npca)) { 432 sdata_info(sdata, 433 "AP UHR NPCA settings invalid, disabling UHR\n"); 434 return IEEE80211_CONN_MODE_EHT; 435 } 436 437 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 438 /* can't happen since we must have UHR to parse the elems */ 439 if (WARN_ON(!uhr_cap)) 440 return IEEE80211_CONN_MODE_EHT; 441 442 if (uhr_cap->mac.mac_cap[0] & IEEE80211_UHR_MAC_CAP0_NPCA_SUPP) 443 *chandef = npca_chandef; 444 445 dbe = ieee80211_uhr_oper_dbe_info(uhr_oper); 446 if (dbe) { 447 const struct ieee80211_uhr_cap_dbe *dbe_cap; 448 u8 dbe_bw_oper; 449 u8 dbe_bw_cap; 450 451 dbe_cap = ieee80211_uhr_dbe_cap(elems->uhr_cap); 452 453 if (!dbe_cap) { 454 sdata_info(sdata, 455 "AP without UHR DBE capability uses it, disabling UHR\n"); 456 return IEEE80211_CONN_MODE_EHT; 457 } 458 459 dbe_bw_oper = u8_get_bits(dbe->params, 460 IEEE80211_UHR_DBE_OPER_BANDWIDTH); 461 462 if (le16_get_bits(uhr_oper->params, 463 IEEE80211_UHR_OPER_PARAMS_DBE_BW) != dbe_bw_oper) { 464 sdata_info(sdata, 465 "AP UHR DBE settings mismatch, disabling UHR\n"); 466 return IEEE80211_CONN_MODE_EHT; 467 } 468 469 if (ieee80211_uhr_dbe_bw_mhz(dbe_bw_oper) < 0) { 470 sdata_info(sdata, 471 "AP UHR DBE bandwidth invalid, disabling UHR\n"); 472 return IEEE80211_CONN_MODE_EHT; 473 } 474 475 dbe_bw_cap = u8_get_bits(dbe_cap->cap, 476 IEEE80211_UHR_MAC_CAP_DBE_MAX_BW); 477 478 switch (dbe_bw_cap) { 479 case IEEE80211_UHR_DBE_MAX_BW_40: 480 case IEEE80211_UHR_DBE_MAX_BW_80: 481 case IEEE80211_UHR_DBE_MAX_BW_160: 482 case IEEE80211_UHR_DBE_MAX_BW_320: 483 break; 484 default: 485 sdata_info(sdata, 486 "AP UHR DBE capability invalid, disabling UHR\n"); 487 return IEEE80211_CONN_MODE_EHT; 488 } 489 490 /* 1-4 are same in DBE capabilities, map 320-2 to 320 */ 491 if (dbe_bw_oper == IEEE80211_UHR_DBE_OPER_BW_320_2) 492 dbe_bw_oper = IEEE80211_UHR_DBE_MAX_BW_320; 493 if (dbe_bw_oper > dbe_bw_cap) { 494 sdata_info(sdata, 495 "AP UHR DBE wider than capability, disabling UHR\n"); 496 return IEEE80211_CONN_MODE_EHT; 497 } 498 } 499 500 dbe_chandef = *chandef; 501 502 if (cfg80211_chandef_add_dbe(&dbe_chandef, dbe)) { 503 sdata_info(sdata, 504 "AP UHR DBE settings invalid, disabling UHR\n"); 505 return IEEE80211_CONN_MODE_EHT; 506 } 507 508 if (dbe && 509 /* maybe driver would like to never use DBE */ 510 uhr_cap->mac.mac_cap[1] & IEEE80211_UHR_MAC_CAP1_DBE_SUPP && 511 ieee80211_chandef_usable(sdata, &dbe_chandef, 512 IEEE80211_CHAN_DISABLED)) { 513 out->non_dbe_width = chandef->width; 514 *chandef = dbe_chandef; 515 out->dbe_used = true; 516 } 517 } else if (data->cur_chandef && data->cur_dbe_used && 518 cfg80211_chandef_compatible(chandef, data->cur_chandef)) { 519 u8 dbe_bw = le16_get_bits(uhr_oper->params, 520 IEEE80211_UHR_OPER_PARAMS_DBE_BW); 521 int dbe_bw_mhz; 522 523 dbe_bw_mhz = ieee80211_uhr_dbe_bw_mhz(dbe_bw); 524 if (dbe_bw_mhz < 0) { 525 sdata_info(sdata, 526 "AP UHR DBE bandwidth invalid, drop UHR\n"); 527 return IEEE80211_CONN_MODE_EHT; 528 } 529 530 if (cfg80211_chandef_get_width(data->cur_chandef) == dbe_bw_mhz) { 531 *chandef = *data->cur_chandef; 532 out->dbe_used = true; 533 } 534 } 535 536 return IEEE80211_CONN_MODE_UHR; 537 } 538 539 static bool 540 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 541 struct ieee80211_supported_band *sband, 542 const struct ieee80211_ht_operation *ht_op) 543 { 544 struct ieee80211_sta_ht_cap sta_ht_cap; 545 int i; 546 547 if (sband->band == NL80211_BAND_6GHZ) 548 return true; 549 550 if (!ht_op) 551 return false; 552 553 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 554 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 555 556 /* 557 * Some Xfinity XB8 firmware advertises >1 spatial stream MCS indexes in 558 * their basic HT-MCS set. On cards with lower spatial streams, the check 559 * would fail, and we'd be stuck with no HT when it in fact work fine with 560 * its own supported rate. So check it only in strict mode. 561 */ 562 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 563 return true; 564 565 /* 566 * P802.11REVme/D7.0 - 6.5.4.2.4 567 * ... 568 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 569 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 570 * in the HT Operation parameter that contains any unsupported MCSs, 571 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 572 * contain a ResultCode parameter that is not set to the value SUCCESS. 573 * ... 574 */ 575 576 /* Simply check that all basic rates are in the STA RX mask */ 577 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 578 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 579 ht_op->basic_set[i]) 580 return false; 581 } 582 583 return true; 584 } 585 586 static bool 587 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 588 int link_id, 589 struct ieee80211_supported_band *sband, 590 const struct ieee80211_vht_operation *vht_op) 591 { 592 struct ieee80211_sta_vht_cap sta_vht_cap; 593 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 594 int nss; 595 596 if (sband->band != NL80211_BAND_5GHZ) 597 return true; 598 599 if (!vht_op) 600 return false; 601 602 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 603 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 604 605 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 606 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 607 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 608 609 /* 610 * Many APs are incorrectly advertising an all-zero value here, 611 * which really means MCS 0-7 are required for 1-8 streams, but 612 * they don't really mean it that way. 613 * Some other APs are incorrectly advertising 3 spatial streams 614 * with MCS 0-7 are required, but don't really mean it that way 615 * and we'll connect only with HT, rather than even HE. 616 * As a result, unfortunately the VHT basic MCS/NSS set cannot 617 * be used at all, so check it only in strict mode. 618 */ 619 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 620 return true; 621 622 /* 623 * P802.11REVme/D7.0 - 6.5.4.2.4 624 * ... 625 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 626 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 627 * field in the VHT Operation parameter that contains any unsupported 628 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 629 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 630 * that is not set to the value SUCCESS. 631 * ... 632 */ 633 for (nss = 8; nss > 0; nss--) { 634 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 635 u8 sta_rx_val; 636 u8 sta_tx_val; 637 638 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 639 continue; 640 641 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 642 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 643 644 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 645 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 646 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 647 link_id_info(sdata, link_id, 648 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 649 nss, sta_rx_val, sta_tx_val, ap_op_val); 650 return false; 651 } 652 } 653 654 return true; 655 } 656 657 static bool 658 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 659 int link_id, 660 const struct ieee80211_he_cap_elem *he_cap, 661 const struct ieee80211_he_operation *he_op) 662 { 663 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 664 u16 mcs_80_map_tx, mcs_80_map_rx; 665 u16 ap_min_req_set; 666 int nss; 667 668 if (!he_cap) 669 return false; 670 671 /* mcs_nss is right after he_cap info */ 672 he_mcs_nss_supp = (void *)(he_cap + 1); 673 674 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 675 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 676 677 /* P802.11-REVme/D0.3 678 * 27.1.1 Introduction to the HE PHY 679 * ... 680 * An HE STA shall support the following features: 681 * ... 682 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 683 * supported channel widths for HE SU PPDUs 684 */ 685 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 686 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 687 link_id_info(sdata, link_id, 688 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 689 mcs_80_map_tx, mcs_80_map_rx); 690 return false; 691 } 692 693 if (!he_op) 694 return true; 695 696 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 697 698 /* 699 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 700 * zeroes, which is nonsense, and completely inconsistent with itself 701 * (it doesn't have 8 streams). Accept the settings in this case anyway. 702 */ 703 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 704 return true; 705 706 /* make sure the AP is consistent with itself 707 * 708 * P802.11-REVme/D0.3 709 * 26.17.1 Basic HE BSS operation 710 * 711 * A STA that is operating in an HE BSS shall be able to receive and 712 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 713 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 714 * MLME-START.request primitive and shall be able to receive at each of 715 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 716 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 717 * primitive 718 */ 719 for (nss = 8; nss > 0; nss--) { 720 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 721 u8 ap_rx_val; 722 u8 ap_tx_val; 723 724 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 725 continue; 726 727 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 728 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 729 730 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 731 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 732 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 733 link_id_info(sdata, link_id, 734 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 735 nss, ap_rx_val, ap_tx_val, ap_op_val); 736 return false; 737 } 738 } 739 740 return true; 741 } 742 743 static bool 744 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 745 struct ieee80211_supported_band *sband, 746 const struct ieee80211_he_operation *he_op) 747 { 748 const struct ieee80211_sta_he_cap *sta_he_cap = 749 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 750 u16 ap_min_req_set; 751 int i; 752 753 if (!sta_he_cap || !he_op) 754 return false; 755 756 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 757 758 /* 759 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 760 * zeroes, which is nonsense, and completely inconsistent with itself 761 * (it doesn't have 8 streams). Accept the settings in this case anyway. 762 */ 763 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 764 return true; 765 766 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 767 for (i = 0; i < 3; i++) { 768 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 769 &sta_he_cap->he_mcs_nss_supp; 770 u16 sta_mcs_map_rx = 771 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 772 u16 sta_mcs_map_tx = 773 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 774 u8 nss; 775 bool verified = true; 776 777 /* 778 * For each band there is a maximum of 8 spatial streams 779 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 780 * of 2 bits per NSS (1-8), with the values defined in enum 781 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 782 * capabilities aren't less than the AP's minimum requirements 783 * for this HE BSS per SS. 784 * It is enough to find one such band that meets the reqs. 785 */ 786 for (nss = 8; nss > 0; nss--) { 787 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 788 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 789 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 790 791 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 792 continue; 793 794 /* 795 * Make sure the HE AP doesn't require MCSs that aren't 796 * supported by the client as required by spec 797 * 798 * P802.11-REVme/D0.3 799 * 26.17.1 Basic HE BSS operation 800 * 801 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 802 * a BSS, unless it supports (i.e., is able to both transmit and 803 * receive using) all of the <HE-MCS, NSS> tuples in the basic 804 * HE-MCS and NSS set. 805 */ 806 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 807 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 808 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 809 verified = false; 810 break; 811 } 812 } 813 814 if (verified) 815 return true; 816 } 817 818 /* If here, STA doesn't meet AP's HE min requirements */ 819 return false; 820 } 821 822 static u8 823 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 824 const struct ieee80211_sta_eht_cap *sta_eht_cap, 825 unsigned int idx, int bw) 826 { 827 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 828 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 829 830 /* handle us being a 20 MHz-only EHT STA - with four values 831 * for MCS 0-7, 8-9, 10-11, 12-13. 832 */ 833 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 834 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 835 836 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 837 if (idx > 0) 838 idx--; 839 840 switch (bw) { 841 case 0: 842 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 843 case 1: 844 if (!(he_phy_cap0 & 845 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 846 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 847 return 0xff; /* pass check */ 848 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 849 case 2: 850 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 851 return 0xff; /* pass check */ 852 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 853 } 854 855 WARN_ON(1); 856 return 0; 857 } 858 859 static bool 860 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 861 struct ieee80211_supported_band *sband, 862 const struct ieee80211_eht_operation *eht_op) 863 { 864 const struct ieee80211_sta_he_cap *sta_he_cap = 865 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 866 const struct ieee80211_sta_eht_cap *sta_eht_cap = 867 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 868 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 869 unsigned int i; 870 871 if (!sta_he_cap || !sta_eht_cap || !eht_op) 872 return false; 873 874 req = &eht_op->basic_mcs_nss; 875 876 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 877 u8 req_rx_nss, req_tx_nss; 878 unsigned int bw; 879 880 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 881 IEEE80211_EHT_MCS_NSS_RX); 882 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 883 IEEE80211_EHT_MCS_NSS_TX); 884 885 for (bw = 0; bw < 3; bw++) { 886 u8 have, have_rx_nss, have_tx_nss; 887 888 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 889 sta_eht_cap, 890 i, bw); 891 have_rx_nss = u8_get_bits(have, 892 IEEE80211_EHT_MCS_NSS_RX); 893 have_tx_nss = u8_get_bits(have, 894 IEEE80211_EHT_MCS_NSS_TX); 895 896 if (req_rx_nss > have_rx_nss || 897 req_tx_nss > have_tx_nss) 898 return false; 899 } 900 } 901 902 return true; 903 } 904 905 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 906 const u8 *supp_rates, 907 unsigned int supp_rates_len, 908 const u8 *ext_supp_rates, 909 unsigned int ext_supp_rates_len, 910 u32 *rates, u32 *basic_rates, 911 unsigned long *unknown_rates_selectors, 912 bool *have_higher_than_11mbit, 913 int *min_rate, int *min_rate_index) 914 { 915 int i, j; 916 917 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 918 u8 supp_rate = i < supp_rates_len ? 919 supp_rates[i] : 920 ext_supp_rates[i - supp_rates_len]; 921 int rate = supp_rate & 0x7f; 922 bool is_basic = !!(supp_rate & 0x80); 923 924 if ((rate * 5) > 110 && have_higher_than_11mbit) 925 *have_higher_than_11mbit = true; 926 927 /* 928 * Skip membership selectors since they're not rates. 929 * 930 * Note: Even though the membership selector and the basic 931 * rate flag share the same bit, they are not exactly 932 * the same. 933 */ 934 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 935 if (unknown_rates_selectors) 936 set_bit(rate, unknown_rates_selectors); 937 continue; 938 } 939 940 for (j = 0; j < sband->n_bitrates; j++) { 941 struct ieee80211_rate *br; 942 int brate; 943 944 br = &sband->bitrates[j]; 945 946 brate = DIV_ROUND_UP(br->bitrate, 5); 947 if (brate == rate) { 948 if (rates) 949 *rates |= BIT(j); 950 if (is_basic && basic_rates) 951 *basic_rates |= BIT(j); 952 if (min_rate && (rate * 5) < *min_rate) { 953 *min_rate = rate * 5; 954 if (min_rate_index) 955 *min_rate_index = j; 956 } 957 break; 958 } 959 } 960 961 /* Handle an unknown entry as if it is an unknown selector */ 962 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 963 set_bit(rate, unknown_rates_selectors); 964 } 965 } 966 967 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 968 { 969 if (c->width == NL80211_CHAN_WIDTH_80P80) 970 return 4 + 4; 971 972 return cfg80211_chandef_get_width(c) / 20; 973 } 974 975 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 976 { 977 switch (c->width) { 978 case NL80211_CHAN_WIDTH_20: 979 case NL80211_CHAN_WIDTH_20_NOHT: 980 return 1; 981 case NL80211_CHAN_WIDTH_40: 982 return 2; 983 case NL80211_CHAN_WIDTH_80P80: 984 case NL80211_CHAN_WIDTH_80: 985 return 3; 986 case NL80211_CHAN_WIDTH_160: 987 return 4; 988 case NL80211_CHAN_WIDTH_320: 989 return 5; 990 default: 991 WARN_ON(1); 992 return 0; 993 } 994 } 995 996 VISIBLE_IF_MAC80211_KUNIT int 997 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 998 u8 n_partial_subchans) 999 { 1000 int n = ieee80211_chandef_num_subchans(ap); 1001 struct cfg80211_chan_def tmp = *ap; 1002 int offset = 0; 1003 1004 /* 1005 * Given a chandef (in this context, it's the AP's) and a number 1006 * of subchannels that we want to look at ('n_partial_subchans'), 1007 * calculate the offset in number of subchannels between the full 1008 * and the subset with the desired width. 1009 */ 1010 1011 /* same number of subchannels means no offset, obviously */ 1012 if (n == n_partial_subchans) 1013 return 0; 1014 1015 /* don't WARN - misconfigured APs could cause this if their N > width */ 1016 if (n < n_partial_subchans) 1017 return 0; 1018 1019 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 1020 u32 prev = tmp.center_freq1; 1021 1022 ieee80211_chandef_downgrade(&tmp, NULL); 1023 1024 /* 1025 * if center_freq moved up, half the original channels 1026 * are gone now but were below, so increase offset 1027 */ 1028 if (prev < tmp.center_freq1) 1029 offset += ieee80211_chandef_num_subchans(&tmp); 1030 } 1031 1032 /* 1033 * 80+80 with secondary 80 below primary - four subchannels for it 1034 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 1035 */ 1036 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 1037 ap->center_freq2 < ap->center_freq1) 1038 offset += 4; 1039 1040 return offset; 1041 } 1042 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 1043 1044 VISIBLE_IF_MAC80211_KUNIT void 1045 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 1046 const struct cfg80211_chan_def *ap, 1047 const struct cfg80211_chan_def *used) 1048 { 1049 u8 needed = ieee80211_chandef_num_subchans(used); 1050 u8 have = ieee80211_chandef_num_subchans(ap); 1051 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 1052 u8 offset; 1053 1054 if (!psd->valid) 1055 return; 1056 1057 /* if N is zero, all defaults were used, no point in rearranging */ 1058 if (!psd->n) 1059 goto out; 1060 1061 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 1062 1063 /* 1064 * This assumes that 'N' is consistent with the HE channel, as 1065 * it should be (otherwise the AP is broken). 1066 * 1067 * In psd->power we have values in the order 0..N, 0..K, where 1068 * N+K should cover the entire channel per 'ap', but even if it 1069 * doesn't then we've pre-filled 'unlimited' as defaults. 1070 * 1071 * But this is all the wrong order, we want to have them in the 1072 * order of the 'used' channel. 1073 * 1074 * So for example, we could have a 320 MHz EHT AP, which has the 1075 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 1076 * seem to be considered for the TPE), as follows: 1077 * 1078 * EHT 320: | | | | | | | | | | | | | | | | | 1079 * HE 80: | | | | | 1080 * used 160: | | | | | | | | | 1081 * 1082 * N entries: |--|--|--|--| 1083 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 1084 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 1085 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1086 * used chan: 0 1 2 3 4 5 6 7 1087 * 1088 * The idx in the power array ('power idx') is like this since it 1089 * comes directly from the element's N and K entries in their 1090 * element order, and those are this way for HE compatibility. 1091 * 1092 * Rearrange them as desired here, first by putting them into the 1093 * 'full chan' order, and then selecting the necessary subset for 1094 * the 'used chan'. 1095 */ 1096 1097 /* first reorder according to AP channel */ 1098 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 1099 for (int i = 0; i < have; i++) { 1100 if (i < offset) 1101 tmp[i] = psd->power[i + psd->n]; 1102 else if (i < offset + psd->n) 1103 tmp[i] = psd->power[i - offset]; 1104 else 1105 tmp[i] = psd->power[i]; 1106 } 1107 1108 /* 1109 * and then select the subset for the used channel 1110 * (set everything to defaults first in case a driver is confused) 1111 */ 1112 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 1113 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 1114 for (int i = 0; i < needed; i++) 1115 psd->power[i] = tmp[offset + i]; 1116 1117 out: 1118 /* limit, but don't lie if there are defaults in the data */ 1119 if (needed < psd->count) 1120 psd->count = needed; 1121 } 1122 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 1123 1124 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 1125 const struct cfg80211_chan_def *ap, 1126 const struct cfg80211_chan_def *used) 1127 { 1128 /* ignore this completely for narrow/invalid channels */ 1129 if (!ieee80211_chandef_num_subchans(ap) || 1130 !ieee80211_chandef_num_subchans(used)) { 1131 ieee80211_clear_tpe(tpe); 1132 return; 1133 } 1134 1135 for (int i = 0; i < 2; i++) { 1136 int needed_pwr_count; 1137 1138 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 1139 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 1140 1141 /* limit this to the widths we actually need */ 1142 needed_pwr_count = ieee80211_chandef_num_widths(used); 1143 if (needed_pwr_count < tpe->max_local[i].count) 1144 tpe->max_local[i].count = needed_pwr_count; 1145 if (needed_pwr_count < tpe->max_reg_client[i].count) 1146 tpe->max_reg_client[i].count = needed_pwr_count; 1147 } 1148 } 1149 1150 /* 1151 * The AP part of the channel request is used to distinguish settings 1152 * to the device used for wider bandwidth OFDMA. This is used in the 1153 * channel context code to assign two channel contexts even if they're 1154 * both for the same channel, if the AP bandwidths are incompatible. 1155 * If not EHT (or driver override) then ap.chan == NULL indicates that 1156 * there's no wider BW OFDMA used. 1157 */ 1158 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 1159 struct ieee80211_chan_req *chanreq, 1160 struct ieee80211_conn_settings *conn, 1161 struct cfg80211_chan_def *ap_chandef) 1162 { 1163 chanreq->ap.chan = NULL; 1164 1165 if (conn->mode < IEEE80211_CONN_MODE_EHT) 1166 return; 1167 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1168 return; 1169 1170 chanreq->ap = *ap_chandef; 1171 } 1172 1173 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 1174 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 1175 struct ieee80211_conn_settings *conn, 1176 struct cfg80211_bss *cbss, 1177 struct link_sta_info *link_sta, int link_id, 1178 struct ieee80211_chan_req *chanreq, 1179 struct cfg80211_chan_def *ap_chandef, 1180 unsigned long *userspace_selectors) 1181 { 1182 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1183 struct ieee80211_bss *bss = (void *)cbss->priv; 1184 struct ieee80211_channel *channel = cbss->channel; 1185 /* 1186 * This is for parsing a beacon or probe response here, but it's 1187 * using the *BSS* elements which are synthetic for multi-BSSID, 1188 * created by cfg80211 based on multi-BSSID inheritance etc. As 1189 * a result, this sets neither .bss (since multi-BSSID is parsed 1190 * already) nor a valid .link_id (since it doesn't want to see 1191 * the data from another link.) 1192 */ 1193 struct ieee80211_elems_parse_params parse_params = { 1194 .link_id = -1, 1195 .from_ap = true, 1196 .start = ies->data, 1197 .len = ies->len, 1198 .type = ies->from_beacon ? 1199 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1200 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1201 }; 1202 struct ieee802_11_elems *elems; 1203 struct ieee80211_supported_band *sband; 1204 enum ieee80211_conn_mode ap_mode; 1205 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1206 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1207 struct ieee80211_determine_ap_chan_output ap_chan_out; 1208 struct ieee80211_determine_ap_chan_data ap_chan_data = { 1209 .channel = channel, 1210 .vht_cap_info = bss->vht_cap_info, 1211 .ignore_ht_channel_mismatch = false, 1212 .chandef = ap_chandef, 1213 .conn = conn, 1214 }; 1215 int ret; 1216 1217 again: 1218 parse_params.mode = conn->mode; 1219 elems = ieee802_11_parse_elems_full(&parse_params); 1220 if (!elems) 1221 return ERR_PTR(-ENOMEM); 1222 1223 ap_chan_data.elems = elems; 1224 ap_mode = ieee80211_determine_ap_chan(sdata, &ap_chan_data, 1225 &ap_chan_out); 1226 conn->dbe_enabled = ap_chan_out.dbe_used; 1227 1228 /* this should be impossible since parsing depends on our mode */ 1229 if (WARN_ON(ap_mode > conn->mode)) { 1230 ret = -EINVAL; 1231 goto free; 1232 } 1233 1234 if (conn->mode != ap_mode) { 1235 conn->mode = ap_mode; 1236 kfree(elems); 1237 goto again; 1238 } 1239 1240 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1241 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1242 1243 sband = sdata->local->hw.wiphy->bands[channel->band]; 1244 1245 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1246 elems->ext_supp_rates, elems->ext_supp_rates_len, 1247 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1248 NULL); 1249 1250 switch (channel->band) { 1251 case NL80211_BAND_S1GHZ: 1252 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1253 ret = -EINVAL; 1254 goto free; 1255 } 1256 1257 chanreq->oper = *ap_chandef; 1258 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1259 IEEE80211_CHAN_DISABLED)) { 1260 ret = -EINVAL; 1261 goto free; 1262 } 1263 1264 return elems; 1265 case NL80211_BAND_6GHZ: 1266 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1267 link_id_info(sdata, link_id, 1268 "Rejecting non-HE 6/7 GHz connection"); 1269 ret = -EINVAL; 1270 goto free; 1271 } 1272 break; 1273 default: 1274 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1275 ret = -EINVAL; 1276 goto free; 1277 } 1278 } 1279 1280 switch (ap_mode) { 1281 case IEEE80211_CONN_MODE_S1G: 1282 WARN_ON(1); 1283 ret = -EINVAL; 1284 goto free; 1285 case IEEE80211_CONN_MODE_LEGACY: 1286 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1287 break; 1288 case IEEE80211_CONN_MODE_HT: 1289 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1290 conn->bw_limit, 1291 IEEE80211_CONN_BW_LIMIT_40); 1292 break; 1293 case IEEE80211_CONN_MODE_VHT: 1294 case IEEE80211_CONN_MODE_HE: 1295 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1296 conn->bw_limit, 1297 IEEE80211_CONN_BW_LIMIT_160); 1298 break; 1299 case IEEE80211_CONN_MODE_EHT: 1300 case IEEE80211_CONN_MODE_UHR: 1301 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1302 conn->bw_limit, 1303 IEEE80211_CONN_BW_LIMIT_320); 1304 break; 1305 } 1306 1307 chanreq->oper = *ap_chandef; 1308 1309 bitmap_copy(sta_selectors, userspace_selectors, 128); 1310 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1311 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1312 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1313 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1314 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1315 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1316 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1317 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1318 if (conn->mode >= IEEE80211_CONN_MODE_UHR) 1319 set_bit(BSS_MEMBERSHIP_SELECTOR_UHR_PHY, sta_selectors); 1320 1321 /* 1322 * We do not support EPD or GLK so never add them. 1323 * SAE_H2E is handled through userspace_selectors. 1324 */ 1325 1326 /* Check if we support all required features */ 1327 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1328 link_id_info(sdata, link_id, 1329 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1330 ret = -EINVAL; 1331 goto free; 1332 } 1333 1334 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1335 1336 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1337 IEEE80211_CHAN_DISABLED)) { 1338 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1339 link_id_info(sdata, link_id, 1340 "unusable channel (%d MHz) for connection\n", 1341 chanreq->oper.chan->center_freq); 1342 ret = -EINVAL; 1343 goto free; 1344 } 1345 1346 ieee80211_chanreq_downgrade(chanreq, conn); 1347 } 1348 1349 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1350 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1351 IEEE80211_CHAN_NO_HE)) { 1352 conn->mode = IEEE80211_CONN_MODE_VHT; 1353 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1354 conn->bw_limit, 1355 IEEE80211_CONN_BW_LIMIT_160); 1356 } 1357 1358 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1359 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1360 IEEE80211_CHAN_NO_EHT)) { 1361 conn->mode = IEEE80211_CONN_MODE_HE; 1362 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1363 conn->bw_limit, 1364 IEEE80211_CONN_BW_LIMIT_160); 1365 } 1366 1367 if (conn->mode >= IEEE80211_CONN_MODE_UHR && 1368 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1369 IEEE80211_CHAN_NO_UHR)) 1370 conn->mode = IEEE80211_CONN_MODE_EHT; 1371 1372 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1373 link_id_info(sdata, link_id, 1374 "regulatory prevented using AP config, downgraded\n"); 1375 1376 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1377 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1378 elems->ht_operation)) { 1379 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1380 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1381 link_id_info(sdata, link_id, 1382 "required MCSes not supported, disabling HT\n"); 1383 } 1384 1385 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1386 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1387 elems->vht_operation)) { 1388 conn->mode = IEEE80211_CONN_MODE_HT; 1389 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1390 conn->bw_limit, 1391 IEEE80211_CONN_BW_LIMIT_40); 1392 link_id_info(sdata, link_id, 1393 "required MCSes not supported, disabling VHT\n"); 1394 } 1395 1396 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1397 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1398 (void *)elems->he_cap, 1399 elems->he_operation) || 1400 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1401 elems->he_operation))) { 1402 conn->mode = IEEE80211_CONN_MODE_VHT; 1403 link_id_info(sdata, link_id, 1404 "required MCSes not supported, disabling HE\n"); 1405 } 1406 1407 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1408 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1409 elems->eht_operation)) { 1410 conn->mode = IEEE80211_CONN_MODE_HE; 1411 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1412 conn->bw_limit, 1413 IEEE80211_CONN_BW_LIMIT_160); 1414 link_id_info(sdata, link_id, 1415 "required MCSes not supported, disabling EHT\n"); 1416 } 1417 1418 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1419 channel->band != NL80211_BAND_2GHZ && 1420 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1421 conn->mode = IEEE80211_CONN_MODE_HE; 1422 link_id_info(sdata, link_id, 1423 "required bandwidth not supported, disabling EHT\n"); 1424 } 1425 1426 /* the mode can only decrease, so this must terminate */ 1427 if (ap_mode != conn->mode) { 1428 kfree(elems); 1429 goto again; 1430 } 1431 1432 mlme_link_id_dbg(sdata, link_id, 1433 "connecting with %s mode, max bandwidth %d MHz\n", 1434 ieee80211_conn_mode_str(conn->mode), 1435 20 * (1 << conn->bw_limit)); 1436 1437 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1438 ret = -EINVAL; 1439 goto free; 1440 } 1441 1442 if (conn->dbe_enabled && link_sta) 1443 link_sta->uhr_usable_tx_width = 1444 ieee80211_chan_width_to_rx_bw(ap_chan_out.non_dbe_width); 1445 1446 return elems; 1447 free: 1448 kfree(elems); 1449 return ERR_PTR(ret); 1450 } 1451 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1452 1453 static void ieee80211_send_uhr_omp_req_dbe(struct ieee80211_sub_if_data *sdata, 1454 u16 link_mask, bool initial) 1455 { 1456 struct ieee80211_mle_basic_common_info *common; 1457 struct ieee80211_mle_per_sta_profile *per_sta; 1458 struct ieee80211_uhr_mode_change_tuple *tuple; 1459 struct ieee80211_local *local = sdata->local; 1460 struct ieee80211_multi_link_elem *mle; 1461 struct ieee80211_link_data *link; 1462 struct ieee80211_tx_info *info; 1463 struct ieee80211_mgmt *mgmt; 1464 struct sk_buff *skb; 1465 u8 *ml_elem_len; 1466 size_t size; 1467 1468 if (initial) { 1469 bool enabled = false; 1470 1471 for_each_link_data(sdata, link) { 1472 if (!(link_mask & BIT(link->link_id))) 1473 continue; 1474 if (link->u.mgd.conn.dbe_enabled) { 1475 enabled = true; 1476 break; 1477 } 1478 } 1479 1480 if (!enabled) 1481 return; 1482 } 1483 1484 if (sdata->u.mgd.uhr_omp.links) { 1485 if (initial) 1486 sdata->u.mgd.uhr_omp.pending_init |= link_mask; 1487 else 1488 sdata->u.mgd.uhr_omp.pending |= link_mask; 1489 return; 1490 } 1491 1492 size = local->hw.extra_tx_headroom + 1493 IEEE80211_MIN_ACTION_SIZE(uhr_link_reconf_req) + 1494 3 + sizeof(*mle) + sizeof(*common) + 1495 IEEE80211_MLD_MAX_NUM_LINKS * 1496 (2 + sizeof(*per_sta) + 1497 3 + sizeof(*tuple) /* single tuple for each link */); 1498 1499 skb = alloc_skb(size, GFP_KERNEL); 1500 if (!skb) 1501 return; 1502 1503 skb_reserve(skb, local->hw.extra_tx_headroom); 1504 1505 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(uhr_link_reconf_req)); 1506 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1507 IEEE80211_STYPE_ACTION); 1508 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1509 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1510 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1511 1512 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_UHR; 1513 mgmt->u.action.action_code = 1514 IEEE80211_PROTECTED_UHR_ACTION_LINK_RECONFIG_REQUEST; 1515 1516 sdata->u.mgd.dialog_token_alloc++; 1517 /* 1518 * NOTE: 1519 * Driver and FW might both send these frames, and iwlwifi 1520 * decided that the driver uses odd numbers, FW uses even 1521 * numbers. For now, hardcode that here, until it matters 1522 * to some other driver. 1523 * 1524 * Note also that there's currently no real synchronisation 1525 * in this case, but it's not valid that both send such a 1526 * frame at the same time, i.e. while waiting for a response 1527 * there can't be another frame sent. This needs addressing 1528 * in the future. 1529 */ 1530 if (sdata->u.mgd.dialog_token_alloc % 2 == 0) 1531 sdata->u.mgd.dialog_token_alloc++; 1532 1533 sdata->u.mgd.uhr_omp.dialog_token = sdata->u.mgd.dialog_token_alloc; 1534 mgmt->u.action.uhr_link_reconf_req.dialog_token = 1535 sdata->u.mgd.uhr_omp.dialog_token; 1536 mgmt->u.action.uhr_link_reconf_req.type = 1537 IEEE80211_UHR_LINK_RECONFIG_REQUEST_OMP_REQUEST; 1538 1539 skb_put_u8(skb, WLAN_EID_EXTENSION); 1540 ml_elem_len = skb_put(skb, 1); 1541 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1542 mle = skb_put_zero(skb, sizeof(*mle)); 1543 mle->control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 1544 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 1545 1546 common = skb_put(skb, sizeof(*common)); 1547 common->len = sizeof(*common); 1548 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1549 1550 for_each_link_data(sdata, link) { 1551 u8 *subelem_len; 1552 1553 if (!(link_mask & BIT(link->link_id))) 1554 continue; 1555 1556 sdata->u.mgd.uhr_omp.links |= BIT(link->link_id); 1557 1558 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1559 subelem_len = skb_put(skb, 1); 1560 per_sta = skb_put_zero(skb, sizeof(*per_sta)); 1561 per_sta->control = 1562 le16_encode_bits(link->link_id, 1563 IEEE80211_MLE_STA_CONTROL_LINK_ID) | 1564 le16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_UHR_OMP_UPD, 1565 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 1566 per_sta->sta_info_len = 1; /* includes itself */ 1567 1568 skb_put_u8(skb, WLAN_EID_EXTENSION); 1569 skb_put_u8(skb, 1 + sizeof(*tuple)); 1570 skb_put_u8(skb, WLAN_EID_EXT_UHR_MODE_CHG); 1571 tuple = skb_put_zero(skb, sizeof(*tuple)); 1572 tuple->control = 1573 le16_encode_bits(IEEE80211_UHR_MODE_CHANGE_MODE_ID_DBE, 1574 IEEE80211_UHR_MODE_CHANGE_CONTROL_MODE_ID); 1575 1576 if (link->u.mgd.conn.dbe_enabled) 1577 tuple->control |= 1578 cpu_to_le16(IEEE80211_UHR_MODE_CHANGE_CONTROL_MODE_ENABLE); 1579 1580 ieee80211_fragment_element(skb, subelem_len, 1581 IEEE80211_MLE_SUBELEM_FRAGMENT); 1582 } 1583 1584 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1585 1586 info = IEEE80211_SKB_CB(skb); 1587 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1588 info->status_data = IEEE80211_STATUS_TYPE_UHR_OMP; 1589 ieee80211_tx_skb(sdata, skb); 1590 } 1591 1592 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1593 struct ieee802_11_elems *elems, 1594 bool update, u64 *changed, u16 stype) 1595 { 1596 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1597 struct cfg80211_chan_def ap_chandef; 1598 struct ieee80211_determine_ap_chan_output ap_chan_out; 1599 struct ieee80211_determine_ap_chan_data ap_chan_data = { 1600 .channel = channel, 1601 .vht_cap_info = 0, 1602 .ignore_ht_channel_mismatch = true, 1603 .chandef = &ap_chandef, 1604 .elems = elems, 1605 .conn = &link->u.mgd.conn, 1606 .cur_chandef = &link->conf->chanreq.oper, 1607 .cur_dbe_used = link->u.mgd.conn.dbe_enabled, 1608 }; 1609 struct ieee80211_sub_if_data *sdata = link->sdata; 1610 struct ieee80211_chanctx_conf *chanctx_conf; 1611 struct ieee80211_chan_req chanreq = {}; 1612 enum ieee80211_conn_mode ap_mode; 1613 const char *frame; 1614 u16 ht_opmode; 1615 int ret; 1616 1617 switch (stype) { 1618 case IEEE80211_STYPE_BEACON: 1619 frame = "beacon"; 1620 break; 1621 case IEEE80211_STYPE_ASSOC_RESP: 1622 frame = "assoc response"; 1623 break; 1624 case IEEE80211_STYPE_REASSOC_RESP: 1625 frame = "reassoc response"; 1626 break; 1627 case IEEE80211_STYPE_ACTION: 1628 /* the only action frame that gets here */ 1629 frame = "ML reconf response"; 1630 break; 1631 default: 1632 return -EINVAL; 1633 } 1634 1635 /* don't track any bandwidth changes in legacy/S1G modes */ 1636 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1637 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1638 return 0; 1639 1640 if (elems->vht_cap_elem) 1641 ap_chan_data.vht_cap_info = 1642 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1643 1644 ap_mode = ieee80211_determine_ap_chan(sdata, &ap_chan_data, 1645 &ap_chan_out); 1646 link->u.mgd.conn.dbe_enabled = ap_chan_out.dbe_used; 1647 1648 if (ap_mode != link->u.mgd.conn.mode) { 1649 link_info(link, 1650 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1651 link->u.mgd.bssid, 1652 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1653 ieee80211_conn_mode_str(ap_mode), frame); 1654 return -EINVAL; 1655 } 1656 1657 chanreq.oper = ap_chandef; 1658 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1659 &ap_chandef); 1660 1661 /* 1662 * if HT operation mode changed store the new one - 1663 * this may be applicable even if channel is identical 1664 */ 1665 if (elems->ht_operation) { 1666 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1667 if (link->conf->ht_operation_mode != ht_opmode) { 1668 *changed |= BSS_CHANGED_HT; 1669 link->conf->ht_operation_mode = ht_opmode; 1670 } 1671 } 1672 1673 /* 1674 * Downgrade the new channel if we associated with restricted 1675 * bandwidth capabilities. For example, if we associated as a 1676 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1677 * or config reasons) then switching to a 40 MHz channel now 1678 * won't do us any good -- we couldn't use it with the AP. 1679 */ 1680 while (link->u.mgd.conn.bw_limit < 1681 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1682 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1683 1684 /* TPE element is not present in (re)assoc/ML reconfig response */ 1685 if (stype == IEEE80211_STYPE_BEACON && 1686 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1687 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1688 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1689 &chanreq.oper); 1690 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1691 link->conf->tpe = elems->tpe; 1692 *changed |= BSS_CHANGED_TPE; 1693 } 1694 } 1695 1696 /* 1697 * Beacons don't have the full information - we need to track 1698 * critical updates for NPCA parameters etc. For now only handle 1699 * association and link reconfiguration response. 1700 */ 1701 if (stype != IEEE80211_STYPE_BEACON && 1702 chanreq.oper.npca_chan && elems->uhr_operation && 1703 ieee80211_uhr_oper_size_ok((const void *)elems->uhr_operation, 1704 elems->uhr_operation_len, 1705 false)) { 1706 const struct ieee80211_uhr_npca_info *npca; 1707 struct ieee80211_bss_npca_params params = {}; 1708 1709 npca = ieee80211_uhr_npca_info(elems->uhr_operation); 1710 if (!npca) { 1711 chanreq.oper.npca_chan = NULL; 1712 chanreq.oper.npca_punctured = 0; 1713 } else { 1714 params.min_dur_thresh = 1715 le32_get_bits(npca->params, 1716 IEEE80211_UHR_NPCA_PARAMS_MIN_DUR_THRESH); 1717 params.switch_delay = 1718 le32_get_bits(npca->params, 1719 IEEE80211_UHR_NPCA_PARAMS_SWITCH_DELAY); 1720 params.switch_back_delay = 1721 le32_get_bits(npca->params, 1722 IEEE80211_UHR_NPCA_PARAMS_SWITCH_BACK_DELAY); 1723 params.init_qsrc = 1724 le32_get_bits(npca->params, 1725 IEEE80211_UHR_NPCA_PARAMS_INIT_QSRC); 1726 params.moplen = 1727 le32_get_bits(npca->params, 1728 IEEE80211_UHR_NPCA_PARAMS_MOPLEN); 1729 /* don't change the enabled bit yet */ 1730 params.enabled = link->conf->npca.enabled; 1731 } 1732 1733 if (memcmp(¶ms, &link->conf->npca, sizeof(params)) || 1734 !update) { 1735 link->conf->npca = params; 1736 *changed |= BSS_CHANGED_NPCA; 1737 } 1738 } 1739 1740 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) { 1741 if (update) 1742 goto update_npca; 1743 return 0; 1744 } 1745 1746 link_info(link, 1747 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1748 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1749 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1750 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1751 chanreq.oper.center_freq2); 1752 1753 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1754 sdata_info(sdata, 1755 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1756 link->u.mgd.bssid, frame); 1757 return -EINVAL; 1758 } 1759 1760 if (!update) { 1761 link->conf->chanreq = chanreq; 1762 return 0; 1763 } 1764 1765 /* 1766 * We're tracking the current AP here, so don't do any further checks 1767 * here. This keeps us from playing ping-pong with regulatory, without 1768 * it the following can happen (for example): 1769 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1770 * - AP advertises regdom US 1771 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1772 * - we detect an unsupported channel and disconnect 1773 * - disconnect causes CRDA to reload world regdomain and the game 1774 * starts anew. 1775 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1776 * 1777 * It seems possible that there are still scenarios with CSA or real 1778 * bandwidth changes where a this could happen, but those cases are 1779 * less common and wouldn't completely prevent using the AP. 1780 */ 1781 1782 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1783 if (ret) { 1784 sdata_info(sdata, 1785 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1786 link->u.mgd.bssid, frame); 1787 return ret; 1788 } 1789 1790 cfg80211_schedule_channels_check(&sdata->wdev); 1791 1792 update_npca: 1793 chanctx_conf = sdata_dereference(link->conf->chanctx_conf, sdata); 1794 /* must be non-NULL when update is true */ 1795 if (WARN_ON(!chanctx_conf)) 1796 return -EINVAL; 1797 1798 /* 1799 * If we're not associated yet (i.e. in the process associating) 1800 * then the chanctx code won't have enabled NPCA in the link, so 1801 * if the channel context was set up with NPCA for us, enable it. 1802 */ 1803 if (chanreq.oper.npca_chan && chanctx_conf->def.npca_chan && 1804 !link->conf->npca.enabled && !sdata->vif.cfg.assoc) { 1805 link->conf->npca.enabled = true; 1806 *changed |= BSS_CHANGED_NPCA; 1807 } 1808 1809 return 0; 1810 } 1811 1812 /* frame sending functions */ 1813 1814 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1815 struct sk_buff *skb, u8 ap_ht_param, 1816 struct ieee80211_supported_band *sband, 1817 struct ieee80211_channel *channel, 1818 enum ieee80211_smps_mode smps, 1819 const struct ieee80211_conn_settings *conn) 1820 { 1821 u8 *pos; 1822 u32 flags = channel->flags; 1823 u16 cap; 1824 struct ieee80211_sta_ht_cap ht_cap; 1825 1826 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1827 1828 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1829 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1830 1831 /* determine capability flags */ 1832 cap = ht_cap.cap; 1833 1834 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1835 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1836 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1837 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1838 cap &= ~IEEE80211_HT_CAP_SGI_40; 1839 } 1840 break; 1841 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1842 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1843 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1844 cap &= ~IEEE80211_HT_CAP_SGI_40; 1845 } 1846 break; 1847 } 1848 1849 /* 1850 * If 40 MHz was disabled associate as though we weren't 1851 * capable of 40 MHz -- some broken APs will never fall 1852 * back to trying to transmit in 20 MHz. 1853 */ 1854 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1855 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1856 cap &= ~IEEE80211_HT_CAP_SGI_40; 1857 } 1858 1859 /* set SM PS mode properly */ 1860 cap &= ~IEEE80211_HT_CAP_SM_PS; 1861 switch (smps) { 1862 case IEEE80211_SMPS_AUTOMATIC: 1863 case IEEE80211_SMPS_NUM_MODES: 1864 WARN_ON(1); 1865 fallthrough; 1866 case IEEE80211_SMPS_OFF: 1867 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1868 IEEE80211_HT_CAP_SM_PS_SHIFT; 1869 break; 1870 case IEEE80211_SMPS_STATIC: 1871 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1872 IEEE80211_HT_CAP_SM_PS_SHIFT; 1873 break; 1874 case IEEE80211_SMPS_DYNAMIC: 1875 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1876 IEEE80211_HT_CAP_SM_PS_SHIFT; 1877 break; 1878 } 1879 1880 /* reserve and fill IE */ 1881 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1882 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1883 } 1884 1885 /* This function determines vht capability flags for the association 1886 * and builds the IE. 1887 * Note - the function returns true to own the MU-MIMO capability 1888 */ 1889 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1890 struct sk_buff *skb, 1891 struct ieee80211_supported_band *sband, 1892 struct ieee80211_vht_cap *ap_vht_cap, 1893 const struct ieee80211_conn_settings *conn) 1894 { 1895 struct ieee80211_local *local = sdata->local; 1896 u8 *pos; 1897 u32 cap; 1898 struct ieee80211_sta_vht_cap vht_cap; 1899 u32 mask, ap_bf_sts, our_bf_sts; 1900 bool mu_mimo_owner = false; 1901 1902 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1903 1904 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1905 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1906 1907 /* determine capability flags */ 1908 cap = vht_cap.cap; 1909 1910 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1911 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1912 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1913 } 1914 1915 /* 1916 * Some APs apparently get confused if our capabilities are better 1917 * than theirs, so restrict what we advertise in the assoc request. 1918 */ 1919 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1920 if (!(ap_vht_cap->vht_cap_info & 1921 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1922 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1923 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1924 else if (!(ap_vht_cap->vht_cap_info & 1925 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1926 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1927 } 1928 1929 /* 1930 * If some other vif is using the MU-MIMO capability we cannot associate 1931 * using MU-MIMO - this will lead to contradictions in the group-id 1932 * mechanism. 1933 * Ownership is defined since association request, in order to avoid 1934 * simultaneous associations with MU-MIMO. 1935 */ 1936 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1937 bool disable_mu_mimo = false; 1938 struct ieee80211_sub_if_data *other; 1939 1940 list_for_each_entry(other, &local->interfaces, list) { 1941 if (other->vif.bss_conf.mu_mimo_owner) { 1942 disable_mu_mimo = true; 1943 break; 1944 } 1945 } 1946 if (disable_mu_mimo) 1947 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1948 else 1949 mu_mimo_owner = true; 1950 } 1951 1952 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1953 1954 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1955 our_bf_sts = cap & mask; 1956 1957 if (ap_bf_sts < our_bf_sts) { 1958 cap &= ~mask; 1959 cap |= ap_bf_sts; 1960 } 1961 1962 /* reserve and fill IE */ 1963 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1964 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1965 1966 return mu_mimo_owner; 1967 } 1968 1969 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1970 struct sk_buff *skb, 1971 enum nl80211_chan_width width, 1972 struct ieee80211_supported_band *sband, 1973 struct ieee80211_mgd_assoc_data *assoc_data) 1974 { 1975 u32 rates; 1976 1977 if (assoc_data->supp_rates_len && 1978 !ieee80211_hw_check(&local->hw, STRICT)) { 1979 /* 1980 * Get all rates supported by the device and the AP as 1981 * some APs don't like getting a superset of their rates 1982 * in the association request (e.g. D-Link DAP 1353 in 1983 * b-only mode)... 1984 */ 1985 ieee80211_parse_bitrates(sband, 1986 assoc_data->supp_rates, 1987 assoc_data->supp_rates_len, 1988 &rates); 1989 } else { 1990 /* 1991 * In case AP not provide any supported rates information 1992 * before association, we send information element(s) with 1993 * all rates that we support. 1994 */ 1995 rates = ~0; 1996 } 1997 1998 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1999 WLAN_EID_SUPP_RATES); 2000 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 2001 WLAN_EID_EXT_SUPP_RATES); 2002 } 2003 2004 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 2005 const u8 *elems, 2006 size_t elems_len, 2007 size_t offset) 2008 { 2009 size_t noffset; 2010 2011 static const u8 before_ht[] = { 2012 WLAN_EID_SSID, 2013 WLAN_EID_SUPP_RATES, 2014 WLAN_EID_EXT_SUPP_RATES, 2015 WLAN_EID_PWR_CAPABILITY, 2016 WLAN_EID_SUPPORTED_CHANNELS, 2017 WLAN_EID_RSN, 2018 WLAN_EID_QOS_CAPA, 2019 WLAN_EID_RRM_ENABLED_CAPABILITIES, 2020 WLAN_EID_MOBILITY_DOMAIN, 2021 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 2022 WLAN_EID_RIC_DATA, /* reassoc only */ 2023 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 2024 }; 2025 static const u8 after_ric[] = { 2026 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 2027 WLAN_EID_HT_CAPABILITY, 2028 WLAN_EID_BSS_COEX_2040, 2029 /* luckily this is almost always there */ 2030 WLAN_EID_EXT_CAPABILITY, 2031 WLAN_EID_QOS_TRAFFIC_CAPA, 2032 WLAN_EID_TIM_BCAST_REQ, 2033 WLAN_EID_INTERWORKING, 2034 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 2035 WLAN_EID_VHT_CAPABILITY, 2036 WLAN_EID_OPMODE_NOTIF, 2037 }; 2038 2039 if (!elems_len) 2040 return offset; 2041 2042 noffset = ieee80211_ie_split_ric(elems, elems_len, 2043 before_ht, 2044 ARRAY_SIZE(before_ht), 2045 after_ric, 2046 ARRAY_SIZE(after_ric), 2047 offset); 2048 skb_put_data(skb, elems + offset, noffset - offset); 2049 2050 return noffset; 2051 } 2052 2053 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 2054 const u8 *elems, 2055 size_t elems_len, 2056 size_t offset) 2057 { 2058 static const u8 before_vht[] = { 2059 /* 2060 * no need to list the ones split off before HT 2061 * or generated here 2062 */ 2063 WLAN_EID_BSS_COEX_2040, 2064 WLAN_EID_EXT_CAPABILITY, 2065 WLAN_EID_QOS_TRAFFIC_CAPA, 2066 WLAN_EID_TIM_BCAST_REQ, 2067 WLAN_EID_INTERWORKING, 2068 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 2069 }; 2070 size_t noffset; 2071 2072 if (!elems_len) 2073 return offset; 2074 2075 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 2076 noffset = ieee80211_ie_split(elems, elems_len, 2077 before_vht, ARRAY_SIZE(before_vht), 2078 offset); 2079 skb_put_data(skb, elems + offset, noffset - offset); 2080 2081 return noffset; 2082 } 2083 2084 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 2085 const u8 *elems, 2086 size_t elems_len, 2087 size_t offset) 2088 { 2089 static const u8 before_he[] = { 2090 /* 2091 * no need to list the ones split off before VHT 2092 * or generated here 2093 */ 2094 WLAN_EID_OPMODE_NOTIF, 2095 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 2096 /* 11ai elements */ 2097 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 2098 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 2099 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 2100 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 2101 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 2102 /* TODO: add 11ah/11aj/11ak elements */ 2103 }; 2104 size_t noffset; 2105 2106 if (!elems_len) 2107 return offset; 2108 2109 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 2110 noffset = ieee80211_ie_split(elems, elems_len, 2111 before_he, ARRAY_SIZE(before_he), 2112 offset); 2113 skb_put_data(skb, elems + offset, noffset - offset); 2114 2115 return noffset; 2116 } 2117 2118 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 2119 const u8 *elems, size_t elems_len, 2120 size_t offset) 2121 { 2122 static const u8 before_reg_conn[] = { 2123 /* 2124 * no need to list the ones split off before HE 2125 * or generated here 2126 */ 2127 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 2128 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 2129 }; 2130 size_t noffset; 2131 2132 if (!elems_len) 2133 return offset; 2134 2135 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 2136 ARRAY_SIZE(before_reg_conn), offset); 2137 skb_put_data(skb, elems + offset, noffset - offset); 2138 2139 return noffset; 2140 } 2141 2142 #define PRESENT_ELEMS_MAX 8 2143 #define PRESENT_ELEM_EXT_OFFS 0x100 2144 2145 static void 2146 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2147 struct sk_buff *skb, u16 capab, 2148 const struct element *ext_capa, 2149 const u16 *present_elems, 2150 struct ieee80211_mgd_assoc_data *assoc_data); 2151 2152 static size_t 2153 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 2154 struct sk_buff *skb, u16 *capab, 2155 const struct element *ext_capa, 2156 const u8 *extra_elems, 2157 size_t extra_elems_len, 2158 unsigned int link_id, 2159 struct ieee80211_link_data *link, 2160 u16 *present_elems, 2161 struct ieee80211_mgd_assoc_data *assoc_data) 2162 { 2163 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2164 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2165 struct ieee80211_channel *chan = cbss->channel; 2166 const struct ieee80211_sband_iftype_data *iftd; 2167 struct ieee80211_local *local = sdata->local; 2168 struct ieee80211_supported_band *sband; 2169 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 2170 struct ieee80211_chanctx_conf *chanctx_conf; 2171 enum ieee80211_smps_mode smps_mode; 2172 u16 orig_capab = *capab; 2173 size_t offset = 0; 2174 int present_elems_len = 0; 2175 u8 *pos; 2176 int i; 2177 2178 #define ADD_PRESENT_ELEM(id) do { \ 2179 /* need a last for termination - we use 0 == SSID */ \ 2180 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 2181 present_elems[present_elems_len++] = (id); \ 2182 } while (0) 2183 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 2184 2185 if (link) 2186 smps_mode = link->smps_mode; 2187 else if (sdata->u.mgd.powersave) 2188 smps_mode = IEEE80211_SMPS_DYNAMIC; 2189 else 2190 smps_mode = IEEE80211_SMPS_OFF; 2191 2192 if (link) { 2193 /* 2194 * 5/10 MHz scenarios are only viable without MLO, in which 2195 * case this pointer should be used ... All of this is a bit 2196 * unclear though, not sure this even works at all. 2197 */ 2198 rcu_read_lock(); 2199 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 2200 if (chanctx_conf) 2201 width = chanctx_conf->def.width; 2202 rcu_read_unlock(); 2203 } 2204 2205 sband = local->hw.wiphy->bands[chan->band]; 2206 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2207 2208 if (sband->band == NL80211_BAND_2GHZ) { 2209 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 2210 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 2211 } 2212 2213 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 2214 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 2215 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 2216 2217 if (sband->band != NL80211_BAND_S1GHZ) 2218 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 2219 2220 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 2221 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 2222 struct cfg80211_chan_def chandef = { 2223 .width = width, 2224 .chan = chan, 2225 }; 2226 2227 pos = skb_put(skb, 4); 2228 *pos++ = WLAN_EID_PWR_CAPABILITY; 2229 *pos++ = 2; 2230 *pos++ = 0; /* min tx power */ 2231 /* max tx power */ 2232 *pos++ = ieee80211_chandef_max_power(&chandef); 2233 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 2234 } 2235 2236 /* 2237 * Per spec, we shouldn't include the list of channels if we advertise 2238 * support for extended channel switching, but we've always done that; 2239 * (for now?) apply this restriction only on the (new) 6 GHz band. 2240 */ 2241 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 2242 (sband->band != NL80211_BAND_6GHZ || 2243 !ext_capa || ext_capa->datalen < 1 || 2244 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 2245 /* TODO: get this in reg domain format */ 2246 pos = skb_put(skb, 2 * sband->n_channels + 2); 2247 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 2248 *pos++ = 2 * sband->n_channels; 2249 for (i = 0; i < sband->n_channels; i++) { 2250 int cf = sband->channels[i].center_freq; 2251 2252 *pos++ = ieee80211_frequency_to_channel(cf); 2253 *pos++ = 1; /* one channel in the subband*/ 2254 } 2255 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 2256 } 2257 2258 /* if present, add any custom IEs that go before HT */ 2259 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 2260 extra_elems_len, 2261 offset); 2262 2263 if (sband->band != NL80211_BAND_6GHZ && 2264 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 2265 ieee80211_add_ht_ie(sdata, skb, 2266 assoc_data->link[link_id].ap_ht_param, 2267 sband, chan, smps_mode, 2268 &assoc_data->link[link_id].conn); 2269 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 2270 } 2271 2272 /* if present, add any custom IEs that go before VHT */ 2273 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 2274 extra_elems_len, 2275 offset); 2276 2277 if (sband->band != NL80211_BAND_6GHZ && 2278 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 2279 sband->vht_cap.vht_supported) { 2280 bool mu_mimo_owner = 2281 ieee80211_add_vht_ie(sdata, skb, sband, 2282 &assoc_data->link[link_id].ap_vht_cap, 2283 &assoc_data->link[link_id].conn); 2284 2285 if (link) 2286 link->conf->mu_mimo_owner = mu_mimo_owner; 2287 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 2288 } 2289 2290 /* if present, add any custom IEs that go before HE */ 2291 offset = ieee80211_add_before_he_elems(skb, extra_elems, 2292 extra_elems_len, 2293 offset); 2294 2295 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 2296 ieee80211_put_he_cap(skb, sdata, sband, 2297 &assoc_data->link[link_id].conn); 2298 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 2299 if (sband->band == NL80211_BAND_6GHZ) 2300 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 2301 } 2302 2303 /* 2304 * if present, add any custom IEs that go before regulatory 2305 * connectivity element 2306 */ 2307 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 2308 extra_elems_len, offset); 2309 2310 if (sband->band == NL80211_BAND_6GHZ) { 2311 /* 2312 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 2313 * capable of operating on the 6 GHz band shall transmit 2314 * regulatory connectivity element. 2315 */ 2316 ieee80211_put_reg_conn(skb, chan->flags); 2317 } 2318 2319 /* 2320 * careful - need to know about all the present elems before 2321 * calling ieee80211_assoc_add_ml_elem(), so add these if 2322 * we're going to put them after the ML element 2323 */ 2324 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 2325 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 2326 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 2327 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_UHR_CAPA); 2328 2329 if (link_id == assoc_data->assoc_link_id) 2330 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 2331 present_elems, assoc_data); 2332 2333 /* crash if somebody gets it wrong */ 2334 present_elems = NULL; 2335 2336 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 2337 ieee80211_put_eht_cap(skb, sdata, sband, 2338 &assoc_data->link[link_id].conn); 2339 2340 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 2341 ieee80211_put_uhr_cap(skb, sdata, sband); 2342 2343 if (sband->band == NL80211_BAND_S1GHZ) { 2344 ieee80211_add_aid_request_ie(sdata, skb); 2345 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 2346 } 2347 2348 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 2349 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 2350 2351 return offset; 2352 } 2353 2354 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 2355 const u16 *outer, 2356 const u16 *inner) 2357 { 2358 unsigned int skb_len = skb->len; 2359 bool at_extension = false; 2360 bool added = false; 2361 int i, j; 2362 u8 *len, *list_len = NULL; 2363 2364 skb_put_u8(skb, WLAN_EID_EXTENSION); 2365 len = skb_put(skb, 1); 2366 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 2367 2368 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 2369 u16 elem = outer[i]; 2370 bool have_inner = false; 2371 2372 /* should at least be sorted in the sense of normal -> ext */ 2373 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 2374 2375 /* switch to extension list */ 2376 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 2377 at_extension = true; 2378 if (!list_len) 2379 skb_put_u8(skb, 0); 2380 list_len = NULL; 2381 } 2382 2383 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 2384 if (elem == inner[j]) { 2385 have_inner = true; 2386 break; 2387 } 2388 } 2389 2390 if (have_inner) 2391 continue; 2392 2393 if (!list_len) { 2394 list_len = skb_put(skb, 1); 2395 *list_len = 0; 2396 } 2397 *list_len += 1; 2398 skb_put_u8(skb, (u8)elem); 2399 added = true; 2400 } 2401 2402 /* if we added a list but no extension list, make a zero-len one */ 2403 if (added && (!at_extension || !list_len)) 2404 skb_put_u8(skb, 0); 2405 2406 /* if nothing added remove extension element completely */ 2407 if (!added) 2408 skb_trim(skb, skb_len); 2409 else 2410 *len = skb->len - skb_len - 2; 2411 } 2412 2413 static void 2414 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2415 struct sk_buff *skb, u16 capab, 2416 const struct element *ext_capa, 2417 const u16 *outer_present_elems, 2418 struct ieee80211_mgd_assoc_data *assoc_data) 2419 { 2420 struct ieee80211_local *local = sdata->local; 2421 struct ieee80211_multi_link_elem *ml_elem; 2422 struct ieee80211_mle_basic_common_info *common; 2423 const struct wiphy_iftype_ext_capab *ift_ext_capa; 2424 __le16 eml_capa = 0, mld_capa_ops = 0; 2425 unsigned int link_id; 2426 u8 *ml_elem_len; 2427 void *capab_pos; 2428 2429 if (!ieee80211_vif_is_mld(&sdata->vif)) 2430 return; 2431 2432 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 2433 ieee80211_vif_type_p2p(&sdata->vif)); 2434 if (ift_ext_capa) { 2435 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 2436 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 2437 } 2438 2439 skb_put_u8(skb, WLAN_EID_EXTENSION); 2440 ml_elem_len = skb_put(skb, 1); 2441 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2442 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2443 ml_elem->control = 2444 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2445 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2446 common = skb_put(skb, sizeof(*common)); 2447 common->len = sizeof(*common) + 2448 2; /* MLD capa/ops */ 2449 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2450 2451 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2452 if (eml_capa & 2453 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2454 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2455 common->len += 2; /* EML capabilities */ 2456 ml_elem->control |= 2457 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2458 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2459 } 2460 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2461 2462 if (assoc_data->ext_mld_capa_ops) { 2463 ml_elem->control |= 2464 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2465 common->len += 2; 2466 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2467 sizeof(assoc_data->ext_mld_capa_ops)); 2468 } 2469 2470 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2471 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2472 const u8 *extra_elems; 2473 size_t extra_elems_len; 2474 size_t extra_used; 2475 u8 *subelem_len = NULL; 2476 __le16 ctrl; 2477 2478 if (!assoc_data->link[link_id].bss || 2479 link_id == assoc_data->assoc_link_id) 2480 continue; 2481 2482 extra_elems = assoc_data->link[link_id].elems; 2483 extra_elems_len = assoc_data->link[link_id].elems_len; 2484 2485 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2486 subelem_len = skb_put(skb, 1); 2487 2488 ctrl = cpu_to_le16(link_id | 2489 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2490 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2491 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2492 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2493 skb_put_data(skb, assoc_data->link[link_id].addr, 2494 ETH_ALEN); 2495 /* 2496 * Now add the contents of the (re)association request, 2497 * but the "listen interval" and "current AP address" 2498 * (if applicable) are skipped. So we only have 2499 * the capability field (remember the position and fill 2500 * later), followed by the elements added below by 2501 * calling ieee80211_add_link_elems(). 2502 */ 2503 capab_pos = skb_put(skb, 2); 2504 2505 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2506 ext_capa, 2507 extra_elems, 2508 extra_elems_len, 2509 link_id, NULL, 2510 link_present_elems, 2511 assoc_data); 2512 if (extra_elems) 2513 skb_put_data(skb, extra_elems + extra_used, 2514 extra_elems_len - extra_used); 2515 2516 put_unaligned_le16(capab, capab_pos); 2517 2518 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2519 link_present_elems); 2520 2521 ieee80211_fragment_element(skb, subelem_len, 2522 IEEE80211_MLE_SUBELEM_FRAGMENT); 2523 } 2524 2525 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2526 } 2527 2528 static int 2529 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2530 enum nl80211_iftype iftype, 2531 struct cfg80211_bss *cbss, 2532 size_t elems_len) 2533 { 2534 struct ieee80211_local *local = sdata->local; 2535 const struct ieee80211_sband_iftype_data *iftd; 2536 struct ieee80211_supported_band *sband; 2537 size_t size = 0; 2538 2539 if (!cbss) 2540 return size; 2541 2542 sband = local->hw.wiphy->bands[cbss->channel->band]; 2543 2544 /* add STA profile elements length */ 2545 size += elems_len; 2546 2547 /* and supported rates length */ 2548 size += 4 + sband->n_bitrates; 2549 2550 /* supported channels */ 2551 size += 2 + 2 * sband->n_channels; 2552 2553 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2554 if (iftd) 2555 size += iftd->vendor_elems.len; 2556 2557 /* power capability */ 2558 size += 4; 2559 2560 /* HT, VHT, HE, EHT */ 2561 size += 2 + sizeof(struct ieee80211_ht_cap); 2562 size += 2 + sizeof(struct ieee80211_vht_cap); 2563 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2564 sizeof(struct ieee80211_he_mcs_nss_supp) + 2565 IEEE80211_HE_PPE_THRES_MAX_LEN; 2566 2567 if (sband->band == NL80211_BAND_6GHZ) { 2568 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2569 /* reg connection */ 2570 size += 4; 2571 } 2572 2573 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2574 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2575 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2576 2577 size += 2 + 1 + sizeof(struct ieee80211_uhr_cap); 2578 2579 return size; 2580 } 2581 2582 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2583 { 2584 struct ieee80211_local *local = sdata->local; 2585 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2586 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2587 struct ieee80211_link_data *link; 2588 struct sk_buff *skb; 2589 struct ieee80211_mgmt *mgmt; 2590 u8 *pos, qos_info, *ie_start; 2591 size_t offset, noffset; 2592 u16 capab = 0, link_capab; 2593 __le16 listen_int; 2594 struct element *ext_capa = NULL; 2595 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2596 struct ieee80211_prep_tx_info info = {}; 2597 unsigned int link_id, n_links = 0; 2598 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2599 struct sta_info *sta; 2600 bool assoc_encrypt; 2601 void *capab_pos; 2602 size_t size; 2603 int ret; 2604 2605 /* we know it's writable, cast away the const */ 2606 if (assoc_data->ie_len) 2607 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2608 assoc_data->ie, 2609 assoc_data->ie_len); 2610 2611 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2612 2613 size = local->hw.extra_tx_headroom + 2614 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2615 2 + assoc_data->ssid_len + /* SSID */ 2616 assoc_data->ie_len + /* extra IEs */ 2617 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2618 9; /* WMM */ 2619 2620 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2621 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2622 size_t elems_len = assoc_data->link[link_id].elems_len; 2623 2624 if (!cbss) 2625 continue; 2626 2627 n_links++; 2628 2629 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2630 elems_len); 2631 2632 /* non-inheritance element */ 2633 size += 2 + 2 + PRESENT_ELEMS_MAX; 2634 2635 /* should be the same across all BSSes */ 2636 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2637 capab |= WLAN_CAPABILITY_PRIVACY; 2638 } 2639 2640 if (ieee80211_vif_is_mld(&sdata->vif)) { 2641 /* consider the multi-link element with STA profile */ 2642 size += sizeof(struct ieee80211_multi_link_elem); 2643 /* max common info field in basic multi-link element */ 2644 size += sizeof(struct ieee80211_mle_basic_common_info) + 2645 2 + /* capa & op */ 2646 2 + /* ext capa & op */ 2647 2; /* EML capa */ 2648 2649 /* The capability elements were already considered above */ 2650 size += (n_links - 1) * 2651 (1 + 1 + /* subelement ID/length */ 2652 2 + /* STA control */ 2653 1 + ETH_ALEN + 2 /* STA Info field */); 2654 } 2655 2656 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2657 if (WARN_ON(!link)) 2658 return -EINVAL; 2659 2660 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2661 return -EINVAL; 2662 2663 skb = alloc_skb(size, GFP_KERNEL); 2664 if (!skb) 2665 return -ENOMEM; 2666 2667 skb_reserve(skb, local->hw.extra_tx_headroom); 2668 2669 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2670 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2671 2672 /* Set MBSSID support for HE AP if needed */ 2673 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2674 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2675 ext_capa && ext_capa->datalen >= 3) 2676 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2677 2678 mgmt = skb_put_zero(skb, 24); 2679 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2680 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2681 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2682 2683 listen_int = cpu_to_le16(assoc_data->s1g ? 2684 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2685 local->hw.conf.listen_interval); 2686 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2687 skb_put(skb, 10); 2688 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2689 IEEE80211_STYPE_REASSOC_REQ); 2690 capab_pos = &mgmt->u.reassoc_req.capab_info; 2691 mgmt->u.reassoc_req.listen_interval = listen_int; 2692 memcpy(mgmt->u.reassoc_req.current_ap, 2693 assoc_data->prev_ap_addr, ETH_ALEN); 2694 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2695 } else { 2696 skb_put(skb, 4); 2697 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2698 IEEE80211_STYPE_ASSOC_REQ); 2699 capab_pos = &mgmt->u.assoc_req.capab_info; 2700 mgmt->u.assoc_req.listen_interval = listen_int; 2701 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2702 } 2703 2704 /* SSID */ 2705 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2706 ie_start = pos; 2707 *pos++ = WLAN_EID_SSID; 2708 *pos++ = assoc_data->ssid_len; 2709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2710 2711 /* 2712 * This bit is technically reserved, so it shouldn't matter for either 2713 * the AP or us, but it also means we shouldn't set it. However, we've 2714 * always set it in the past, and apparently some EHT APs check that 2715 * we don't set it. To avoid interoperability issues with old APs that 2716 * for some reason check it and want it to be set, set the bit for all 2717 * pre-EHT connections as we used to do. 2718 */ 2719 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2720 !ieee80211_hw_check(&local->hw, STRICT)) 2721 capab |= WLAN_CAPABILITY_ESS; 2722 2723 /* add the elements for the assoc (main) link */ 2724 link_capab = capab; 2725 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2726 ext_capa, 2727 assoc_data->ie, 2728 assoc_data->ie_len, 2729 assoc_data->assoc_link_id, link, 2730 present_elems, assoc_data); 2731 put_unaligned_le16(link_capab, capab_pos); 2732 2733 /* if present, add any custom non-vendor IEs */ 2734 if (assoc_data->ie_len) { 2735 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2736 assoc_data->ie_len, 2737 offset); 2738 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2739 offset = noffset; 2740 } 2741 2742 if (assoc_data->wmm) { 2743 if (assoc_data->uapsd) { 2744 qos_info = ifmgd->uapsd_queues; 2745 qos_info |= (ifmgd->uapsd_max_sp_len << 2746 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2747 } else { 2748 qos_info = 0; 2749 } 2750 2751 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2752 } 2753 2754 /* add any remaining custom (i.e. vendor specific here) IEs */ 2755 if (assoc_data->ie_len) { 2756 noffset = assoc_data->ie_len; 2757 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2758 } 2759 2760 if (assoc_data->fils_kek_len) { 2761 ret = fils_encrypt_assoc_req(skb, assoc_data); 2762 if (ret < 0) { 2763 dev_kfree_skb(skb); 2764 return ret; 2765 } 2766 } 2767 2768 pos = skb_tail_pointer(skb); 2769 kfree(ifmgd->assoc_req_ies); 2770 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2771 if (!ifmgd->assoc_req_ies) { 2772 dev_kfree_skb(skb); 2773 return -ENOMEM; 2774 } 2775 2776 ifmgd->assoc_req_ies_len = pos - ie_start; 2777 2778 info.link_id = assoc_data->assoc_link_id; 2779 drv_mgd_prepare_tx(local, sdata, &info); 2780 2781 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 2782 2783 assoc_encrypt = sta && sta->sta.epp_peer && 2784 wiphy_dereference(sdata->local->hw.wiphy, 2785 sta->ptk[sta->ptk_idx]); 2786 2787 if (!assoc_encrypt) 2788 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2789 2790 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2791 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2792 IEEE80211_TX_INTFL_MLME_CONN_TX; 2793 ieee80211_tx_skb(sdata, skb); 2794 2795 return 0; 2796 } 2797 2798 void ieee80211_send_pspoll(struct ieee80211_local *local, 2799 struct ieee80211_sub_if_data *sdata) 2800 { 2801 struct ieee80211_pspoll *pspoll; 2802 struct sk_buff *skb; 2803 2804 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2805 if (!skb) 2806 return; 2807 2808 pspoll = (struct ieee80211_pspoll *) skb->data; 2809 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2810 2811 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2812 ieee80211_tx_skb(sdata, skb); 2813 } 2814 2815 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2816 struct ieee80211_sub_if_data *sdata, 2817 bool powersave) 2818 { 2819 struct sk_buff *skb; 2820 struct ieee80211_hdr_3addr *nullfunc; 2821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2822 2823 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2824 !ieee80211_hw_check(&local->hw, 2825 DOESNT_SUPPORT_QOS_NDP)); 2826 if (!skb) 2827 return; 2828 2829 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2830 if (powersave) 2831 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2832 2833 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2834 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2835 2836 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2838 2839 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2840 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2841 2842 ieee80211_tx_skb(sdata, skb); 2843 } 2844 2845 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2846 struct ieee80211_sub_if_data *sdata) 2847 { 2848 struct sk_buff *skb; 2849 struct ieee80211_hdr *nullfunc; 2850 __le16 fc; 2851 2852 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2853 return; 2854 2855 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2856 if (!skb) 2857 return; 2858 2859 skb_reserve(skb, local->hw.extra_tx_headroom); 2860 2861 nullfunc = skb_put_zero(skb, 30); 2862 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2863 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2864 nullfunc->frame_control = fc; 2865 memcpy(nullfunc->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN); 2866 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2867 memcpy(nullfunc->addr3, sdata->vif.cfg.ap_addr, ETH_ALEN); 2868 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2869 2870 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2871 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2872 ieee80211_tx_skb(sdata, skb); 2873 } 2874 2875 /* spectrum management related things */ 2876 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2877 struct wiphy_work *work) 2878 { 2879 struct ieee80211_link_data *link = 2880 container_of(work, struct ieee80211_link_data, 2881 u.mgd.csa.switch_work.work); 2882 struct ieee80211_sub_if_data *sdata = link->sdata; 2883 struct ieee80211_local *local = sdata->local; 2884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2885 int ret; 2886 2887 if (!ieee80211_sdata_running(sdata)) 2888 return; 2889 2890 lockdep_assert_wiphy(local->hw.wiphy); 2891 2892 if (!ifmgd->associated) 2893 return; 2894 2895 if (!link->conf->csa_active) 2896 return; 2897 2898 /* 2899 * If the link isn't active (now), we cannot wait for beacons, won't 2900 * have a reserved chanctx, etc. Just switch over the chandef and 2901 * update cfg80211 directly. 2902 */ 2903 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2904 struct link_sta_info *link_sta; 2905 struct sta_info *ap_sta; 2906 2907 link->conf->chanreq = link->csa.chanreq; 2908 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2909 link->link_id); 2910 link->conf->csa_active = false; 2911 link->u.mgd.conn.dbe_enabled = false; 2912 2913 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2914 if (WARN_ON(!ap_sta)) 2915 return; 2916 2917 link_sta = wiphy_dereference(wiphy, 2918 ap_sta->link[link->link_id]); 2919 if (WARN_ON(!link_sta)) 2920 return; 2921 2922 /* 2923 * If the link was somehow deactivated in the middle of enabling 2924 * DBE while waiting for a response, this could be stuck, reset. 2925 */ 2926 link_sta->uhr_usable_tx_width = IEEE80211_STA_RX_BW_MAX; 2927 2928 link_sta->pub->bandwidth = 2929 ieee80211_sta_current_bw(link_sta, 2930 &link->csa.chanreq.oper, 2931 IEEE80211_STA_BW_TX_TO_STA); 2932 return; 2933 } 2934 2935 /* 2936 * using reservation isn't immediate as it may be deferred until later 2937 * with multi-vif. once reservation is complete it will re-schedule the 2938 * work with no reserved_chanctx so verify chandef to check if it 2939 * completed successfully 2940 */ 2941 2942 if (link->reserved_chanctx) { 2943 /* 2944 * with multi-vif csa driver may call ieee80211_csa_finish() 2945 * many times while waiting for other interfaces to use their 2946 * reservations 2947 */ 2948 if (link->reserved_ready) 2949 return; 2950 2951 ret = ieee80211_link_use_reserved_context(link); 2952 if (ret) { 2953 link_info(link, 2954 "failed to use reserved channel context, disconnecting (err=%d)\n", 2955 ret); 2956 wiphy_work_queue(sdata->local->hw.wiphy, 2957 &ifmgd->csa_connection_drop_work); 2958 } 2959 return; 2960 } 2961 2962 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2963 &link->csa.chanreq)) { 2964 link_info(link, 2965 "failed to finalize channel switch, disconnecting\n"); 2966 wiphy_work_queue(sdata->local->hw.wiphy, 2967 &ifmgd->csa_connection_drop_work); 2968 return; 2969 } 2970 2971 link->u.mgd.csa.waiting_bcn = true; 2972 2973 /* 2974 * The next beacon really should always be different, so this should 2975 * have no effect whatsoever. However, some APs (we observed this in 2976 * an Asus AXE11000), the beacon after the CSA might be identical to 2977 * the last beacon on the old channel - in this case we'd ignore it. 2978 * Resetting the CRC will lead us to handle it better (albeit with a 2979 * disconnect, but clearly the AP is broken.) 2980 */ 2981 link->u.mgd.beacon_crc_valid = false; 2982 2983 /* apply new TPE restrictions immediately on the new channel */ 2984 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2985 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2986 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2987 &link->u.mgd.csa.ap_chandef, 2988 &link->conf->chanreq.oper); 2989 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2990 sizeof(link->u.mgd.csa.tpe))) { 2991 link->conf->tpe = link->u.mgd.csa.tpe; 2992 ieee80211_link_info_change_notify(sdata, link, 2993 BSS_CHANGED_TPE); 2994 } 2995 } 2996 2997 /* 2998 * It is not necessary to reset these timers if any link does not 2999 * have an active CSA and that link still receives the beacons 3000 * when other links have active CSA. 3001 */ 3002 for_each_link_data(sdata, link) { 3003 if (!link->conf->csa_active) 3004 return; 3005 } 3006 3007 /* 3008 * Reset the beacon monitor and connection monitor timers when CSA 3009 * is active for all links in MLO when channel switch occurs in all 3010 * the links. 3011 */ 3012 ieee80211_sta_reset_beacon_monitor(sdata); 3013 ieee80211_sta_reset_conn_monitor(sdata); 3014 } 3015 3016 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 3017 { 3018 struct ieee80211_sub_if_data *sdata = link->sdata; 3019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3020 struct link_sta_info *link_sta; 3021 struct sta_info *ap_sta; 3022 int ret; 3023 3024 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3025 3026 WARN_ON(!link->conf->csa_active); 3027 3028 ieee80211_vif_unblock_queues_csa(sdata); 3029 3030 link->conf->csa_active = false; 3031 link->u.mgd.conn.dbe_enabled = false; 3032 link->u.mgd.csa.blocked_tx = false; 3033 link->u.mgd.csa.waiting_bcn = false; 3034 3035 ret = drv_post_channel_switch(link); 3036 if (ret) { 3037 link_info(link, 3038 "driver post channel switch failed, disconnecting\n"); 3039 wiphy_work_queue(sdata->local->hw.wiphy, 3040 &ifmgd->csa_connection_drop_work); 3041 return; 3042 } 3043 3044 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3045 if (WARN_ON(!ap_sta)) 3046 return; 3047 3048 link_sta = sdata_dereference(ap_sta->link[link->link_id], sdata); 3049 if (WARN_ON(!link_sta)) 3050 return; 3051 3052 /* 3053 * If DBE was being activated and CSA happened, this could be 3054 * on a wrong value. Reset it. 3055 */ 3056 link_sta->uhr_usable_tx_width = IEEE80211_STA_RX_BW_MAX; 3057 3058 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 3059 link->link_id); 3060 } 3061 3062 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 3063 unsigned int link_id) 3064 { 3065 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3066 3067 trace_api_chswitch_done(sdata, success, link_id); 3068 3069 rcu_read_lock(); 3070 3071 if (!success) { 3072 sdata_info(sdata, 3073 "driver channel switch failed (link %d), disconnecting\n", 3074 link_id); 3075 wiphy_work_queue(sdata->local->hw.wiphy, 3076 &sdata->u.mgd.csa_connection_drop_work); 3077 } else { 3078 struct ieee80211_link_data *link = 3079 rcu_dereference(sdata->link[link_id]); 3080 3081 if (WARN_ON(!link)) { 3082 rcu_read_unlock(); 3083 return; 3084 } 3085 3086 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 3087 &link->u.mgd.csa.switch_work, 0); 3088 } 3089 3090 rcu_read_unlock(); 3091 } 3092 EXPORT_SYMBOL(ieee80211_chswitch_done); 3093 3094 static void 3095 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 3096 { 3097 struct ieee80211_sub_if_data *sdata = link->sdata; 3098 struct ieee80211_local *local = sdata->local; 3099 3100 lockdep_assert_wiphy(local->hw.wiphy); 3101 3102 if (!local->ops->abort_channel_switch) 3103 return; 3104 3105 if (rcu_access_pointer(link->conf->chanctx_conf)) 3106 ieee80211_link_unreserve_chanctx(link); 3107 3108 ieee80211_vif_unblock_queues_csa(sdata); 3109 3110 link->conf->csa_active = false; 3111 link->u.mgd.csa.blocked_tx = false; 3112 3113 drv_abort_channel_switch(link); 3114 } 3115 3116 struct sta_csa_rnr_iter_data { 3117 struct ieee80211_link_data *link; 3118 struct ieee80211_channel *chan; 3119 u8 mld_id; 3120 }; 3121 3122 static enum cfg80211_rnr_iter_ret 3123 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 3124 const struct ieee80211_neighbor_ap_info *info, 3125 const u8 *tbtt_info, u8 tbtt_info_len) 3126 { 3127 struct sta_csa_rnr_iter_data *data = _data; 3128 struct ieee80211_link_data *link = data->link; 3129 struct ieee80211_sub_if_data *sdata = link->sdata; 3130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3131 const struct ieee80211_tbtt_info_ge_11 *ti; 3132 enum nl80211_band band; 3133 unsigned int center_freq; 3134 int link_id; 3135 3136 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3137 return RNR_ITER_CONTINUE; 3138 3139 if (tbtt_info_len < sizeof(*ti)) 3140 return RNR_ITER_CONTINUE; 3141 3142 ti = (const void *)tbtt_info; 3143 3144 if (ti->mld_params.mld_id != data->mld_id) 3145 return RNR_ITER_CONTINUE; 3146 3147 link_id = le16_get_bits(ti->mld_params.params, 3148 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3149 if (link_id != data->link->link_id) 3150 return RNR_ITER_CONTINUE; 3151 3152 /* we found the entry for our link! */ 3153 3154 /* this AP is confused, it had this right before ... just disconnect */ 3155 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 3156 link_info(link, 3157 "AP now has invalid operating class in RNR, disconnect\n"); 3158 wiphy_work_queue(sdata->local->hw.wiphy, 3159 &ifmgd->csa_connection_drop_work); 3160 return RNR_ITER_BREAK; 3161 } 3162 3163 center_freq = ieee80211_channel_to_frequency(info->channel, band); 3164 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 3165 3166 return RNR_ITER_BREAK; 3167 } 3168 3169 static void 3170 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 3171 struct ieee802_11_elems *elems) 3172 { 3173 struct ieee80211_sub_if_data *sdata = link->sdata; 3174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3175 struct sta_csa_rnr_iter_data data = { 3176 .link = link, 3177 }; 3178 3179 /* 3180 * If we get here, we see a beacon from another link without 3181 * CSA still being reported for it, so now we have to check 3182 * if the CSA was aborted or completed. This may not even be 3183 * perfectly possible if the CSA was only done for changing 3184 * the puncturing, but in that case if the link in inactive 3185 * we don't really care, and if it's an active link (or when 3186 * it's activated later) we'll get a beacon and adjust. 3187 */ 3188 3189 if (WARN_ON(!elems->ml_basic)) 3190 return; 3191 3192 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3193 3194 /* 3195 * So in order to do this, iterate the RNR element(s) and see 3196 * what channel is reported now. 3197 */ 3198 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3199 ieee80211_sta_csa_rnr_iter, &data); 3200 3201 if (!data.chan) { 3202 link_info(link, 3203 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 3204 wiphy_work_queue(sdata->local->hw.wiphy, 3205 &ifmgd->csa_connection_drop_work); 3206 return; 3207 } 3208 3209 /* 3210 * If it doesn't match the CSA, then assume it aborted. This 3211 * may erroneously detect that it was _not_ aborted when it 3212 * was in fact aborted, but only changed the bandwidth or the 3213 * puncturing configuration, but we don't have enough data to 3214 * detect that. 3215 */ 3216 if (data.chan != link->csa.chanreq.oper.chan) 3217 ieee80211_sta_abort_chanswitch(link); 3218 } 3219 3220 enum ieee80211_csa_source { 3221 IEEE80211_CSA_SOURCE_BEACON, 3222 IEEE80211_CSA_SOURCE_OTHER_LINK, 3223 IEEE80211_CSA_SOURCE_PROT_ACTION, 3224 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 3225 }; 3226 3227 static void 3228 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 3229 u64 timestamp, u32 device_timestamp, 3230 struct ieee802_11_elems *full_elems, 3231 struct ieee802_11_elems *csa_elems, 3232 enum ieee80211_csa_source source) 3233 { 3234 struct ieee80211_sub_if_data *sdata = link->sdata; 3235 struct ieee80211_local *local = sdata->local; 3236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3237 struct ieee80211_chanctx *chanctx = NULL; 3238 struct ieee80211_chanctx_conf *conf; 3239 struct ieee80211_csa_ie csa_ie = {}; 3240 struct ieee80211_channel_switch ch_switch = { 3241 .link_id = link->link_id, 3242 .timestamp = timestamp, 3243 .device_timestamp = device_timestamp, 3244 }; 3245 u32 csa_time_tu; 3246 ktime_t now; 3247 int res; 3248 3249 lockdep_assert_wiphy(local->hw.wiphy); 3250 3251 if (csa_elems) { 3252 struct cfg80211_bss *cbss = link->conf->bss; 3253 enum nl80211_band current_band; 3254 struct ieee80211_bss *bss; 3255 3256 if (WARN_ON(!cbss)) 3257 return; 3258 3259 current_band = cbss->channel->band; 3260 bss = (void *)cbss->priv; 3261 3262 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 3263 current_band, 3264 bss->vht_cap_info, 3265 &link->u.mgd.conn, 3266 link->u.mgd.bssid, 3267 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 3268 &csa_ie); 3269 if (res == 0) { 3270 ch_switch.block_tx = csa_ie.mode; 3271 ch_switch.chandef = csa_ie.chanreq.oper; 3272 ch_switch.count = csa_ie.count; 3273 ch_switch.delay = csa_ie.max_switch_time; 3274 } 3275 3276 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 3277 } else { 3278 /* 3279 * If there was no per-STA profile for this link, we 3280 * get called with csa_elems == NULL. This of course means 3281 * there are no CSA elements, so set res=1 indicating 3282 * no more CSA. 3283 */ 3284 res = 1; 3285 } 3286 3287 if (res < 0) { 3288 /* ignore this case, not a protected frame */ 3289 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 3290 return; 3291 goto drop_connection; 3292 } 3293 3294 if (link->conf->csa_active) { 3295 switch (source) { 3296 case IEEE80211_CSA_SOURCE_PROT_ACTION: 3297 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 3298 /* already processing - disregard action frames */ 3299 return; 3300 case IEEE80211_CSA_SOURCE_BEACON: 3301 if (link->u.mgd.csa.waiting_bcn) { 3302 ieee80211_chswitch_post_beacon(link); 3303 /* 3304 * If the CSA is still present after the switch 3305 * we need to consider it as a new CSA (possibly 3306 * to self). This happens by not returning here 3307 * so we'll get to the check below. 3308 */ 3309 } else if (res) { 3310 ieee80211_sta_abort_chanswitch(link); 3311 return; 3312 } else { 3313 drv_channel_switch_rx_beacon(sdata, &ch_switch); 3314 return; 3315 } 3316 break; 3317 case IEEE80211_CSA_SOURCE_OTHER_LINK: 3318 /* active link: we want to see the beacon to continue */ 3319 if (ieee80211_vif_link_active(&sdata->vif, 3320 link->link_id)) 3321 return; 3322 3323 /* switch work ran, so just complete the process */ 3324 if (link->u.mgd.csa.waiting_bcn) { 3325 ieee80211_chswitch_post_beacon(link); 3326 /* 3327 * If the CSA is still present after the switch 3328 * we need to consider it as a new CSA (possibly 3329 * to self). This happens by not returning here 3330 * so we'll get to the check below. 3331 */ 3332 break; 3333 } 3334 3335 /* link still has CSA but we already know, do nothing */ 3336 if (!res) 3337 return; 3338 3339 /* check in the RNR if the CSA aborted */ 3340 ieee80211_sta_other_link_csa_disappeared(link, 3341 full_elems); 3342 return; 3343 } 3344 } 3345 3346 /* no active CSA nor a new one */ 3347 if (res) { 3348 /* 3349 * However, we may have stopped queues when receiving a public 3350 * action frame that couldn't be protected, if it had the quiet 3351 * bit set. This is a trade-off, we want to be quiet as soon as 3352 * possible, but also don't trust the public action frame much, 3353 * as it can't be protected. 3354 */ 3355 if (unlikely(link->u.mgd.csa.blocked_tx)) { 3356 link->u.mgd.csa.blocked_tx = false; 3357 ieee80211_vif_unblock_queues_csa(sdata); 3358 } 3359 return; 3360 } 3361 3362 /* 3363 * We don't really trust public action frames, but block queues (go to 3364 * quiet mode) for them anyway, we should get a beacon soon to either 3365 * know what the CSA really is, or figure out the public action frame 3366 * was actually an attack. 3367 */ 3368 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 3369 if (csa_ie.mode) { 3370 link->u.mgd.csa.blocked_tx = true; 3371 ieee80211_vif_block_queues_csa(sdata); 3372 } 3373 return; 3374 } 3375 3376 if (link->conf->chanreq.oper.chan->band != 3377 csa_ie.chanreq.oper.chan->band) { 3378 link_info(link, 3379 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 3380 link->u.mgd.bssid, 3381 csa_ie.chanreq.oper.chan->center_freq, 3382 csa_ie.chanreq.oper.width, 3383 csa_ie.chanreq.oper.center_freq1, 3384 csa_ie.chanreq.oper.center_freq2); 3385 goto drop_connection; 3386 } 3387 3388 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 3389 IEEE80211_CHAN_DISABLED)) { 3390 link_info(link, 3391 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 3392 link->u.mgd.bssid, 3393 csa_ie.chanreq.oper.chan->center_freq, 3394 csa_ie.chanreq.oper.chan->freq_offset, 3395 csa_ie.chanreq.oper.width, 3396 csa_ie.chanreq.oper.center_freq1, 3397 csa_ie.chanreq.oper.freq1_offset, 3398 csa_ie.chanreq.oper.center_freq2); 3399 goto drop_connection; 3400 } 3401 3402 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 3403 &link->conf->chanreq.oper) && 3404 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 3405 if (link->u.mgd.csa.ignored_same_chan) 3406 return; 3407 link_info(link, 3408 "AP %pM tries to chanswitch to same channel, ignore\n", 3409 link->u.mgd.bssid); 3410 link->u.mgd.csa.ignored_same_chan = true; 3411 return; 3412 } 3413 3414 /* 3415 * Drop all TDLS peers on the affected link - either we disconnect or 3416 * move to a different channel from this point on. There's no telling 3417 * what our peer will do. 3418 * The TDLS WIDER_BW scenario is also problematic, as peers might now 3419 * have an incompatible wider chandef. 3420 */ 3421 ieee80211_teardown_tdls_peers(link); 3422 3423 conf = rcu_dereference_protected(link->conf->chanctx_conf, 3424 lockdep_is_held(&local->hw.wiphy->mtx)); 3425 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 3426 link_info(link, 3427 "no channel context assigned to vif?, disconnecting\n"); 3428 goto drop_connection; 3429 } 3430 3431 if (conf) 3432 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 3433 3434 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 3435 link_info(link, 3436 "driver doesn't support chan-switch with channel contexts\n"); 3437 goto drop_connection; 3438 } 3439 3440 if (drv_pre_channel_switch(sdata, &ch_switch)) { 3441 link_info(link, 3442 "preparing for channel switch failed, disconnecting\n"); 3443 goto drop_connection; 3444 } 3445 3446 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 3447 3448 link->csa.chanreq.oper = csa_ie.chanreq.oper; 3449 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 3450 &csa_ie.chanreq.ap); 3451 3452 if (chanctx) { 3453 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 3454 chanctx->mode, false); 3455 if (res) { 3456 link_info(link, 3457 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 3458 res); 3459 goto drop_connection; 3460 } 3461 } 3462 3463 link->conf->csa_active = true; 3464 link->u.mgd.csa.ignored_same_chan = false; 3465 link->u.mgd.beacon_crc_valid = false; 3466 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3467 3468 if (csa_ie.mode) 3469 ieee80211_vif_block_queues_csa(sdata); 3470 3471 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 3472 link->link_id, csa_ie.count, 3473 csa_ie.mode); 3474 3475 /* we may have to handle timeout for deactivated link in software */ 3476 now = ktime_get_boottime(); 3477 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3478 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3479 3480 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3481 local->ops->channel_switch) { 3482 /* 3483 * Use driver's channel switch callback, the driver will 3484 * later call ieee80211_chswitch_done(). It may deactivate 3485 * the link as well, we handle that elsewhere and queue 3486 * the csa.switch_work for the calculated time then. 3487 */ 3488 drv_channel_switch(local, sdata, &ch_switch); 3489 return; 3490 } 3491 3492 /* channel switch handled in software */ 3493 wiphy_hrtimer_work_queue(local->hw.wiphy, 3494 &link->u.mgd.csa.switch_work, 3495 link->u.mgd.csa.time - now); 3496 return; 3497 drop_connection: 3498 /* 3499 * This is just so that the disconnect flow will know that 3500 * we were trying to switch channel and failed. In case the 3501 * mode is 1 (we are not allowed to Tx), we will know not to 3502 * send a deauthentication frame. Those two fields will be 3503 * reset when the disconnection worker runs. 3504 */ 3505 link->conf->csa_active = true; 3506 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3507 3508 wiphy_work_queue(sdata->local->hw.wiphy, 3509 &ifmgd->csa_connection_drop_work); 3510 } 3511 3512 struct sta_bss_param_ch_cnt_data { 3513 struct ieee80211_sub_if_data *sdata; 3514 u8 reporting_link_id; 3515 u8 mld_id; 3516 }; 3517 3518 static enum cfg80211_rnr_iter_ret 3519 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3520 const struct ieee80211_neighbor_ap_info *info, 3521 const u8 *tbtt_info, u8 tbtt_info_len) 3522 { 3523 struct sta_bss_param_ch_cnt_data *data = _data; 3524 struct ieee80211_sub_if_data *sdata = data->sdata; 3525 const struct ieee80211_tbtt_info_ge_11 *ti; 3526 u8 bss_param_ch_cnt; 3527 int link_id; 3528 3529 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3530 return RNR_ITER_CONTINUE; 3531 3532 if (tbtt_info_len < sizeof(*ti)) 3533 return RNR_ITER_CONTINUE; 3534 3535 ti = (const void *)tbtt_info; 3536 3537 if (ti->mld_params.mld_id != data->mld_id) 3538 return RNR_ITER_CONTINUE; 3539 3540 link_id = le16_get_bits(ti->mld_params.params, 3541 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3542 bss_param_ch_cnt = 3543 le16_get_bits(ti->mld_params.params, 3544 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3545 3546 if (bss_param_ch_cnt != 255 && 3547 link_id < ARRAY_SIZE(sdata->link)) { 3548 struct ieee80211_link_data *link = 3549 sdata_dereference(sdata->link[link_id], sdata); 3550 3551 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3552 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3553 link->conf->bss_param_ch_cnt_link_id = 3554 data->reporting_link_id; 3555 } 3556 } 3557 3558 return RNR_ITER_CONTINUE; 3559 } 3560 3561 static void 3562 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3563 struct ieee80211_bss_conf *bss_conf, 3564 struct ieee802_11_elems *elems) 3565 { 3566 struct sta_bss_param_ch_cnt_data data = { 3567 .reporting_link_id = bss_conf->link_id, 3568 .sdata = sdata, 3569 }; 3570 int bss_param_ch_cnt; 3571 3572 if (!elems->ml_basic) 3573 return; 3574 3575 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3576 3577 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3578 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3579 3580 bss_param_ch_cnt = 3581 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3582 3583 /* 3584 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3585 * didn't change to indicate that we got a beacon on our own 3586 * link. 3587 */ 3588 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3589 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3590 bss_conf->bss_param_ch_cnt_link_id = 3591 bss_conf->link_id; 3592 } 3593 } 3594 3595 static bool 3596 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3597 const u8 *country_ie, u8 country_ie_len, 3598 const u8 *pwr_constr_elem, 3599 int *chan_pwr, int *pwr_reduction) 3600 { 3601 struct ieee80211_country_ie_triplet *triplet; 3602 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3603 int i, chan_increment; 3604 bool have_chan_pwr = false; 3605 3606 /* Invalid IE */ 3607 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3608 return false; 3609 3610 triplet = (void *)(country_ie + 3); 3611 country_ie_len -= 3; 3612 3613 switch (channel->band) { 3614 default: 3615 WARN_ON_ONCE(1); 3616 fallthrough; 3617 case NL80211_BAND_2GHZ: 3618 case NL80211_BAND_60GHZ: 3619 case NL80211_BAND_LC: 3620 chan_increment = 1; 3621 break; 3622 case NL80211_BAND_5GHZ: 3623 chan_increment = 4; 3624 break; 3625 case NL80211_BAND_6GHZ: 3626 /* 3627 * In the 6 GHz band, the "maximum transmit power level" 3628 * field in the triplets is reserved, and thus will be 3629 * zero and we shouldn't use it to control TX power. 3630 * The actual TX power will be given in the transmit 3631 * power envelope element instead. 3632 */ 3633 return false; 3634 } 3635 3636 /* find channel */ 3637 while (country_ie_len >= 3) { 3638 u8 first_channel = triplet->chans.first_channel; 3639 3640 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3641 goto next; 3642 3643 for (i = 0; i < triplet->chans.num_channels; i++) { 3644 if (first_channel + i * chan_increment == chan) { 3645 have_chan_pwr = true; 3646 *chan_pwr = triplet->chans.max_power; 3647 break; 3648 } 3649 } 3650 if (have_chan_pwr) 3651 break; 3652 3653 next: 3654 triplet++; 3655 country_ie_len -= 3; 3656 } 3657 3658 if (have_chan_pwr && pwr_constr_elem) 3659 *pwr_reduction = *pwr_constr_elem; 3660 else 3661 *pwr_reduction = 0; 3662 3663 return have_chan_pwr; 3664 } 3665 3666 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3667 const u8 *cisco_dtpc_ie, 3668 int *pwr_level) 3669 { 3670 /* From practical testing, the first data byte of the DTPC element 3671 * seems to contain the requested dBm level, and the CLI on Cisco 3672 * APs clearly state the range is -127 to 127 dBm, which indicates 3673 * a signed byte, although it seemingly never actually goes negative. 3674 * The other byte seems to always be zero. 3675 */ 3676 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3677 } 3678 3679 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3680 struct ieee80211_channel *channel, 3681 struct ieee80211_mgmt *mgmt, 3682 const u8 *country_ie, u8 country_ie_len, 3683 const u8 *pwr_constr_ie, 3684 const u8 *cisco_dtpc_ie) 3685 { 3686 struct ieee80211_sub_if_data *sdata = link->sdata; 3687 bool has_80211h_pwr = false, has_cisco_pwr = false; 3688 int chan_pwr = 0, pwr_reduction_80211h = 0; 3689 int pwr_level_cisco, pwr_level_80211h; 3690 int new_ap_level; 3691 __le16 capab = mgmt->u.probe_resp.capab_info; 3692 3693 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3694 return 0; /* TODO */ 3695 3696 if (country_ie && 3697 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3698 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3699 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3700 channel, country_ie, country_ie_len, 3701 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3702 pwr_level_80211h = 3703 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3704 } 3705 3706 if (cisco_dtpc_ie) { 3707 ieee80211_find_cisco_dtpc( 3708 channel, cisco_dtpc_ie, &pwr_level_cisco); 3709 has_cisco_pwr = true; 3710 } 3711 3712 if (!has_80211h_pwr && !has_cisco_pwr) 3713 return 0; 3714 3715 /* If we have both 802.11h and Cisco DTPC, apply both limits 3716 * by picking the smallest of the two power levels advertised. 3717 */ 3718 if (has_80211h_pwr && 3719 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3720 new_ap_level = pwr_level_80211h; 3721 3722 if (link->ap_power_level == new_ap_level) 3723 return 0; 3724 3725 sdata_dbg(sdata, 3726 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3727 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3728 link->u.mgd.bssid); 3729 } else { /* has_cisco_pwr is always true here. */ 3730 new_ap_level = pwr_level_cisco; 3731 3732 if (link->ap_power_level == new_ap_level) 3733 return 0; 3734 3735 sdata_dbg(sdata, 3736 "Limiting TX power to %d dBm as advertised by %pM\n", 3737 pwr_level_cisco, link->u.mgd.bssid); 3738 } 3739 3740 link->ap_power_level = new_ap_level; 3741 if (__ieee80211_recalc_txpower(link)) 3742 return BSS_CHANGED_TXPOWER; 3743 return 0; 3744 } 3745 3746 /* powersave */ 3747 static void ieee80211_enable_ps(struct ieee80211_local *local, 3748 struct ieee80211_sub_if_data *sdata) 3749 { 3750 struct ieee80211_conf *conf = &local->hw.conf; 3751 3752 /* 3753 * If we are scanning right now then the parameters will 3754 * take effect when scan finishes. 3755 */ 3756 if (local->scanning) 3757 return; 3758 3759 if (conf->dynamic_ps_timeout > 0 && 3760 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3761 mod_timer(&local->dynamic_ps_timer, jiffies + 3762 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3763 } else { 3764 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3765 ieee80211_send_nullfunc(local, sdata, true); 3766 3767 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3768 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3769 return; 3770 3771 conf->flags |= IEEE80211_CONF_PS; 3772 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3773 } 3774 } 3775 3776 static void ieee80211_change_ps(struct ieee80211_local *local) 3777 { 3778 struct ieee80211_conf *conf = &local->hw.conf; 3779 3780 if (local->ps_sdata) { 3781 ieee80211_enable_ps(local, local->ps_sdata); 3782 } else if (conf->flags & IEEE80211_CONF_PS) { 3783 conf->flags &= ~IEEE80211_CONF_PS; 3784 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3785 timer_delete_sync(&local->dynamic_ps_timer); 3786 wiphy_work_cancel(local->hw.wiphy, 3787 &local->dynamic_ps_enable_work); 3788 } 3789 } 3790 3791 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3792 { 3793 struct ieee80211_local *local = sdata->local; 3794 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3795 struct sta_info *sta = NULL; 3796 bool authorized = false; 3797 3798 if (!mgd->powersave) 3799 return false; 3800 3801 if (mgd->broken_ap) 3802 return false; 3803 3804 if (!mgd->associated) 3805 return false; 3806 3807 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3808 return false; 3809 3810 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3811 !sdata->deflink.u.mgd.have_beacon) 3812 return false; 3813 3814 rcu_read_lock(); 3815 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3816 if (sta) 3817 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3818 rcu_read_unlock(); 3819 3820 return authorized; 3821 } 3822 3823 /* need to hold RTNL or interface lock */ 3824 void ieee80211_recalc_ps(struct ieee80211_local *local) 3825 { 3826 struct ieee80211_sub_if_data *sdata, *found = NULL; 3827 int count = 0; 3828 int timeout; 3829 3830 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3831 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3832 local->ps_sdata = NULL; 3833 return; 3834 } 3835 3836 list_for_each_entry(sdata, &local->interfaces, list) { 3837 if (!ieee80211_sdata_running(sdata)) 3838 continue; 3839 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3840 /* If an AP vif is found, then disable PS 3841 * by setting the count to zero thereby setting 3842 * ps_sdata to NULL. 3843 */ 3844 count = 0; 3845 break; 3846 } 3847 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3848 continue; 3849 found = sdata; 3850 count++; 3851 } 3852 3853 if (count == 1 && ieee80211_powersave_allowed(found)) { 3854 u8 dtimper = found->deflink.u.mgd.dtim_period; 3855 3856 timeout = local->dynamic_ps_forced_timeout; 3857 if (timeout < 0) 3858 timeout = 100; 3859 local->hw.conf.dynamic_ps_timeout = timeout; 3860 3861 /* If the TIM IE is invalid, pretend the value is 1 */ 3862 if (!dtimper) 3863 dtimper = 1; 3864 3865 local->hw.conf.ps_dtim_period = dtimper; 3866 local->ps_sdata = found; 3867 } else { 3868 local->ps_sdata = NULL; 3869 } 3870 3871 ieee80211_change_ps(local); 3872 } 3873 3874 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3875 { 3876 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3877 3878 if (sdata->vif.cfg.ps != ps_allowed) { 3879 sdata->vif.cfg.ps = ps_allowed; 3880 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3881 } 3882 } 3883 3884 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3885 struct wiphy_work *work) 3886 { 3887 struct ieee80211_local *local = 3888 container_of(work, struct ieee80211_local, 3889 dynamic_ps_disable_work); 3890 3891 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3892 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3893 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3894 } 3895 3896 ieee80211_wake_queues_by_reason(&local->hw, 3897 IEEE80211_MAX_QUEUE_MAP, 3898 IEEE80211_QUEUE_STOP_REASON_PS, 3899 false); 3900 } 3901 3902 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3903 struct wiphy_work *work) 3904 { 3905 struct ieee80211_local *local = 3906 container_of(work, struct ieee80211_local, 3907 dynamic_ps_enable_work); 3908 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3909 struct ieee80211_if_managed *ifmgd; 3910 unsigned long flags; 3911 int q; 3912 3913 /* can only happen when PS was just disabled anyway */ 3914 if (!sdata) 3915 return; 3916 3917 ifmgd = &sdata->u.mgd; 3918 3919 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3920 return; 3921 3922 if (local->hw.conf.dynamic_ps_timeout > 0) { 3923 /* don't enter PS if TX frames are pending */ 3924 if (drv_tx_frames_pending(local)) { 3925 mod_timer(&local->dynamic_ps_timer, jiffies + 3926 msecs_to_jiffies( 3927 local->hw.conf.dynamic_ps_timeout)); 3928 return; 3929 } 3930 3931 /* 3932 * transmission can be stopped by others which leads to 3933 * dynamic_ps_timer expiry. Postpone the ps timer if it 3934 * is not the actual idle state. 3935 */ 3936 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3937 for (q = 0; q < local->hw.queues; q++) { 3938 if (local->queue_stop_reasons[q]) { 3939 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3940 flags); 3941 mod_timer(&local->dynamic_ps_timer, jiffies + 3942 msecs_to_jiffies( 3943 local->hw.conf.dynamic_ps_timeout)); 3944 return; 3945 } 3946 } 3947 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3948 } 3949 3950 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3951 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3952 if (drv_tx_frames_pending(local)) { 3953 mod_timer(&local->dynamic_ps_timer, jiffies + 3954 msecs_to_jiffies( 3955 local->hw.conf.dynamic_ps_timeout)); 3956 } else { 3957 ieee80211_send_nullfunc(local, sdata, true); 3958 /* Flush to get the tx status of nullfunc frame */ 3959 ieee80211_flush_queues(local, sdata, false); 3960 } 3961 } 3962 3963 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3964 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3965 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3966 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3967 local->hw.conf.flags |= IEEE80211_CONF_PS; 3968 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3969 } 3970 } 3971 3972 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3973 { 3974 struct ieee80211_local *local = timer_container_of(local, t, 3975 dynamic_ps_timer); 3976 3977 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3978 } 3979 3980 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3981 { 3982 struct ieee80211_link_data *link = 3983 container_of(work, struct ieee80211_link_data, 3984 dfs_cac_timer_work.work); 3985 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3986 struct ieee80211_sub_if_data *sdata = link->sdata; 3987 3988 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3989 3990 if (sdata->wdev.links[link->link_id].cac_started) { 3991 ieee80211_link_release_channel(link); 3992 cfg80211_cac_event(sdata->dev, &chandef, 3993 NL80211_RADAR_CAC_FINISHED, 3994 GFP_KERNEL, link->link_id); 3995 } 3996 } 3997 3998 static bool 3999 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 4000 { 4001 struct ieee80211_local *local = sdata->local; 4002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4003 bool ret = false; 4004 int ac; 4005 4006 if (local->hw.queues < IEEE80211_NUM_ACS) 4007 return false; 4008 4009 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 4010 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 4011 int non_acm_ac; 4012 unsigned long now = jiffies; 4013 4014 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 4015 tx_tspec->admitted_time && 4016 time_after(now, tx_tspec->time_slice_start + HZ)) { 4017 tx_tspec->consumed_tx_time = 0; 4018 tx_tspec->time_slice_start = now; 4019 4020 if (tx_tspec->downgraded) 4021 tx_tspec->action = 4022 TX_TSPEC_ACTION_STOP_DOWNGRADE; 4023 } 4024 4025 switch (tx_tspec->action) { 4026 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 4027 /* take the original parameters */ 4028 if (drv_conf_tx(local, &sdata->deflink, ac, 4029 &sdata->deflink.tx_conf[ac])) 4030 link_err(&sdata->deflink, 4031 "failed to set TX queue parameters for queue %d\n", 4032 ac); 4033 tx_tspec->action = TX_TSPEC_ACTION_NONE; 4034 tx_tspec->downgraded = false; 4035 ret = true; 4036 break; 4037 case TX_TSPEC_ACTION_DOWNGRADE: 4038 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4039 tx_tspec->action = TX_TSPEC_ACTION_NONE; 4040 ret = true; 4041 break; 4042 } 4043 /* downgrade next lower non-ACM AC */ 4044 for (non_acm_ac = ac + 1; 4045 non_acm_ac < IEEE80211_NUM_ACS; 4046 non_acm_ac++) 4047 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 4048 break; 4049 /* Usually the loop will result in using BK even if it 4050 * requires admission control, but such a configuration 4051 * makes no sense and we have to transmit somehow - the 4052 * AC selection does the same thing. 4053 * If we started out trying to downgrade from BK, then 4054 * the extra condition here might be needed. 4055 */ 4056 if (non_acm_ac >= IEEE80211_NUM_ACS) 4057 non_acm_ac = IEEE80211_AC_BK; 4058 if (drv_conf_tx(local, &sdata->deflink, ac, 4059 &sdata->deflink.tx_conf[non_acm_ac])) 4060 link_err(&sdata->deflink, 4061 "failed to set TX queue parameters for queue %d\n", 4062 ac); 4063 tx_tspec->action = TX_TSPEC_ACTION_NONE; 4064 ret = true; 4065 wiphy_delayed_work_queue(local->hw.wiphy, 4066 &ifmgd->tx_tspec_wk, 4067 tx_tspec->time_slice_start + 4068 HZ - now + 1); 4069 break; 4070 case TX_TSPEC_ACTION_NONE: 4071 /* nothing now */ 4072 break; 4073 } 4074 } 4075 4076 return ret; 4077 } 4078 4079 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 4080 { 4081 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 4082 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4083 BSS_CHANGED_QOS); 4084 } 4085 4086 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 4087 struct wiphy_work *work) 4088 { 4089 struct ieee80211_sub_if_data *sdata; 4090 4091 sdata = container_of(work, struct ieee80211_sub_if_data, 4092 u.mgd.tx_tspec_wk.work); 4093 ieee80211_sta_handle_tspec_ac_params(sdata); 4094 } 4095 4096 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 4097 { 4098 struct ieee80211_sub_if_data *sdata = link->sdata; 4099 struct ieee80211_local *local = sdata->local; 4100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4101 struct ieee80211_tx_queue_params *params = link->tx_conf; 4102 u8 ac; 4103 4104 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 4105 mlme_dbg(sdata, 4106 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 4107 ac, params[ac].acm, 4108 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 4109 params[ac].txop, params[ac].uapsd, 4110 ifmgd->tx_tspec[ac].downgraded); 4111 if (!ifmgd->tx_tspec[ac].downgraded && 4112 drv_conf_tx(local, link, ac, ¶ms[ac])) 4113 link_err(link, 4114 "failed to set TX queue parameters for AC %d\n", 4115 ac); 4116 } 4117 } 4118 4119 /* MLME */ 4120 static bool 4121 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 4122 struct ieee80211_link_data *link, 4123 const u8 *wmm_param, size_t wmm_param_len, 4124 const struct ieee80211_mu_edca_param_set *mu_edca) 4125 { 4126 struct ieee80211_sub_if_data *sdata = link->sdata; 4127 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 4128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4129 size_t left; 4130 int count, mu_edca_count, ac; 4131 const u8 *pos; 4132 u8 uapsd_queues = 0; 4133 4134 if (!local->ops->conf_tx) 4135 return false; 4136 4137 if (local->hw.queues < IEEE80211_NUM_ACS) 4138 return false; 4139 4140 if (!wmm_param) 4141 return false; 4142 4143 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 4144 return false; 4145 4146 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 4147 uapsd_queues = ifmgd->uapsd_queues; 4148 4149 count = wmm_param[6] & 0x0f; 4150 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 4151 * if mu_edca was preset before and now it disappeared tell 4152 * the driver about it. 4153 */ 4154 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 4155 if (count == link->u.mgd.wmm_last_param_set && 4156 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 4157 return false; 4158 link->u.mgd.wmm_last_param_set = count; 4159 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 4160 4161 pos = wmm_param + 8; 4162 left = wmm_param_len - 8; 4163 4164 memset(¶ms, 0, sizeof(params)); 4165 4166 sdata->wmm_acm = 0; 4167 for (; left >= 4; left -= 4, pos += 4) { 4168 int aci = (pos[0] >> 5) & 0x03; 4169 int acm = (pos[0] >> 4) & 0x01; 4170 bool uapsd = false; 4171 4172 switch (aci) { 4173 case 1: /* AC_BK */ 4174 ac = IEEE80211_AC_BK; 4175 if (acm) 4176 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 4177 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 4178 uapsd = true; 4179 params[ac].mu_edca = !!mu_edca; 4180 if (mu_edca) 4181 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 4182 break; 4183 case 2: /* AC_VI */ 4184 ac = IEEE80211_AC_VI; 4185 if (acm) 4186 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 4187 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 4188 uapsd = true; 4189 params[ac].mu_edca = !!mu_edca; 4190 if (mu_edca) 4191 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 4192 break; 4193 case 3: /* AC_VO */ 4194 ac = IEEE80211_AC_VO; 4195 if (acm) 4196 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 4197 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 4198 uapsd = true; 4199 params[ac].mu_edca = !!mu_edca; 4200 if (mu_edca) 4201 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 4202 break; 4203 case 0: /* AC_BE */ 4204 default: 4205 ac = IEEE80211_AC_BE; 4206 if (acm) 4207 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 4208 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 4209 uapsd = true; 4210 params[ac].mu_edca = !!mu_edca; 4211 if (mu_edca) 4212 params[ac].mu_edca_param_rec = mu_edca->ac_be; 4213 break; 4214 } 4215 4216 params[ac].aifs = pos[0] & 0x0f; 4217 4218 if (params[ac].aifs < 2) { 4219 link_info(link, 4220 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 4221 params[ac].aifs, aci); 4222 params[ac].aifs = 2; 4223 } 4224 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 4225 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 4226 params[ac].txop = get_unaligned_le16(pos + 2); 4227 params[ac].acm = acm; 4228 params[ac].uapsd = uapsd; 4229 4230 if (params[ac].cw_min == 0 || 4231 params[ac].cw_min > params[ac].cw_max) { 4232 link_info(link, 4233 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 4234 params[ac].cw_min, params[ac].cw_max, aci); 4235 return false; 4236 } 4237 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 4238 } 4239 4240 /* WMM specification requires all 4 ACIs. */ 4241 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 4242 if (params[ac].cw_min == 0) { 4243 link_info(link, 4244 "AP has invalid WMM params (missing AC %d), using defaults\n", 4245 ac); 4246 return false; 4247 } 4248 } 4249 4250 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 4251 link->tx_conf[ac] = params[ac]; 4252 4253 return true; 4254 } 4255 4256 static bool 4257 ieee80211_sta_wmm_params(struct ieee80211_local *local, 4258 struct ieee80211_link_data *link, 4259 const u8 *wmm_param, size_t wmm_param_len, 4260 const struct ieee80211_mu_edca_param_set *mu_edca) 4261 { 4262 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 4263 mu_edca)) 4264 return false; 4265 4266 ieee80211_mgd_set_link_qos_params(link); 4267 4268 /* enable WMM or activate new settings */ 4269 link->conf->qos = true; 4270 return true; 4271 } 4272 4273 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 4274 { 4275 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4276 4277 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 4278 ieee80211_run_deferred_scan(sdata->local); 4279 } 4280 4281 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 4282 { 4283 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4284 4285 __ieee80211_stop_poll(sdata); 4286 } 4287 4288 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 4289 u16 capab, bool erp_valid, u8 erp) 4290 { 4291 struct ieee80211_bss_conf *bss_conf = link->conf; 4292 struct ieee80211_supported_band *sband; 4293 u64 changed = 0; 4294 bool use_protection; 4295 bool use_short_preamble; 4296 bool use_short_slot; 4297 4298 sband = ieee80211_get_link_sband(link); 4299 if (!sband) 4300 return changed; 4301 4302 if (erp_valid) { 4303 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 4304 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 4305 } else { 4306 use_protection = false; 4307 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 4308 } 4309 4310 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 4311 if (sband->band == NL80211_BAND_5GHZ || 4312 sband->band == NL80211_BAND_6GHZ) 4313 use_short_slot = true; 4314 4315 if (use_protection != bss_conf->use_cts_prot) { 4316 bss_conf->use_cts_prot = use_protection; 4317 changed |= BSS_CHANGED_ERP_CTS_PROT; 4318 } 4319 4320 if (use_short_preamble != bss_conf->use_short_preamble) { 4321 bss_conf->use_short_preamble = use_short_preamble; 4322 changed |= BSS_CHANGED_ERP_PREAMBLE; 4323 } 4324 4325 if (use_short_slot != bss_conf->use_short_slot) { 4326 bss_conf->use_short_slot = use_short_slot; 4327 changed |= BSS_CHANGED_ERP_SLOT; 4328 } 4329 4330 return changed; 4331 } 4332 4333 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 4334 struct cfg80211_bss *cbss) 4335 { 4336 struct ieee80211_sub_if_data *sdata = link->sdata; 4337 struct ieee80211_bss_conf *bss_conf = link->conf; 4338 struct ieee80211_bss *bss = (void *)cbss->priv; 4339 u64 changed = BSS_CHANGED_QOS; 4340 4341 /* not really used in MLO */ 4342 sdata->u.mgd.beacon_timeout = 4343 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 4344 bss_conf->beacon_int)); 4345 4346 changed |= ieee80211_handle_bss_capability(link, 4347 bss_conf->assoc_capability, 4348 bss->has_erp_value, 4349 bss->erp_value); 4350 4351 ieee80211_check_rate_mask(link); 4352 4353 link->conf->bss = cbss; 4354 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 4355 4356 if (sdata->vif.p2p || 4357 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4358 const struct cfg80211_bss_ies *ies; 4359 4360 rcu_read_lock(); 4361 ies = rcu_dereference(cbss->ies); 4362 if (ies) { 4363 int ret; 4364 4365 ret = cfg80211_get_p2p_attr( 4366 ies->data, ies->len, 4367 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4368 (u8 *) &bss_conf->p2p_noa_attr, 4369 sizeof(bss_conf->p2p_noa_attr)); 4370 if (ret >= 2) { 4371 link->u.mgd.p2p_noa_index = 4372 bss_conf->p2p_noa_attr.index; 4373 changed |= BSS_CHANGED_P2P_PS; 4374 } 4375 } 4376 rcu_read_unlock(); 4377 } 4378 4379 if (link->u.mgd.have_beacon) { 4380 bss_conf->beacon_rate = bss->beacon_rate; 4381 changed |= BSS_CHANGED_BEACON_INFO; 4382 } else { 4383 bss_conf->beacon_rate = NULL; 4384 } 4385 4386 /* Tell the driver to monitor connection quality (if supported) */ 4387 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 4388 bss_conf->cqm_rssi_thold) 4389 changed |= BSS_CHANGED_CQM; 4390 4391 return changed; 4392 } 4393 4394 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 4395 struct ieee80211_mgd_assoc_data *assoc_data, 4396 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 4397 { 4398 struct ieee80211_local *local = sdata->local; 4399 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4400 u64 vif_changed = BSS_CHANGED_ASSOC; 4401 unsigned int link_id; 4402 4403 lockdep_assert_wiphy(local->hw.wiphy); 4404 4405 sdata->u.mgd.associated = true; 4406 4407 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4408 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4409 struct ieee80211_link_data *link; 4410 4411 if (!cbss || 4412 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4413 continue; 4414 4415 if (ieee80211_vif_is_mld(&sdata->vif) && 4416 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 4417 continue; 4418 4419 link = sdata_dereference(sdata->link[link_id], sdata); 4420 if (WARN_ON(!link)) 4421 return; 4422 4423 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 4424 } 4425 4426 /* just to be sure */ 4427 ieee80211_stop_poll(sdata); 4428 4429 ieee80211_led_assoc(local, 1); 4430 4431 vif_cfg->assoc = 1; 4432 4433 /* Enable ARP filtering */ 4434 if (vif_cfg->arp_addr_cnt) 4435 vif_changed |= BSS_CHANGED_ARP_FILTER; 4436 4437 if (ieee80211_vif_is_mld(&sdata->vif)) { 4438 for (link_id = 0; 4439 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4440 link_id++) { 4441 struct ieee80211_link_data *link; 4442 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4443 4444 if (!cbss || 4445 !(BIT(link_id) & 4446 ieee80211_vif_usable_links(&sdata->vif)) || 4447 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4448 continue; 4449 4450 link = sdata_dereference(sdata->link[link_id], sdata); 4451 if (WARN_ON(!link)) 4452 return; 4453 4454 ieee80211_link_info_change_notify(sdata, link, 4455 changed[link_id]); 4456 4457 ieee80211_recalc_smps(sdata, link); 4458 } 4459 4460 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 4461 } else { 4462 ieee80211_bss_info_change_notify(sdata, 4463 vif_changed | changed[0]); 4464 } 4465 4466 ieee80211_recalc_ps(local); 4467 4468 /* leave this here to not change ordering in non-MLO cases */ 4469 if (!ieee80211_vif_is_mld(&sdata->vif)) 4470 ieee80211_recalc_smps(sdata, &sdata->deflink); 4471 ieee80211_recalc_ps_vif(sdata); 4472 4473 netif_carrier_on(sdata->dev); 4474 } 4475 4476 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4477 { 4478 struct ieee80211_mgd_assoc_data *add_links_data = 4479 sdata->u.mgd.reconf.add_links_data; 4480 4481 if (!ieee80211_vif_is_mld(&sdata->vif) || 4482 !(sdata->u.mgd.reconf.added_links | 4483 sdata->u.mgd.reconf.removed_links)) 4484 return; 4485 4486 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4487 &sdata->u.mgd.reconf.wk); 4488 sdata->u.mgd.reconf.added_links = 0; 4489 sdata->u.mgd.reconf.removed_links = 0; 4490 sdata->u.mgd.reconf.dialog_token = 0; 4491 4492 if (add_links_data) { 4493 struct cfg80211_mlo_reconf_done_data done_data = {}; 4494 u8 link_id; 4495 4496 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4497 link_id++) 4498 done_data.links[link_id].bss = 4499 add_links_data->link[link_id].bss; 4500 4501 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4502 4503 kfree(sdata->u.mgd.reconf.add_links_data); 4504 sdata->u.mgd.reconf.add_links_data = NULL; 4505 } 4506 } 4507 4508 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4509 u16 stype, u16 reason, bool tx, 4510 u8 *frame_buf) 4511 { 4512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4513 struct ieee80211_local *local = sdata->local; 4514 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4515 unsigned int link_id; 4516 u64 changed = 0; 4517 struct ieee80211_prep_tx_info info = { 4518 .subtype = stype, 4519 .was_assoc = true, 4520 .link_id = ffs(sdata->vif.active_links) - 1, 4521 }; 4522 4523 lockdep_assert_wiphy(local->hw.wiphy); 4524 4525 if (frame_buf) 4526 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4527 4528 if (WARN_ON(!ap_sta)) 4529 return; 4530 4531 if (WARN_ON_ONCE(tx && !frame_buf)) 4532 return; 4533 4534 if (WARN_ON(!ifmgd->associated)) 4535 return; 4536 4537 ieee80211_stop_poll(sdata); 4538 4539 ifmgd->associated = false; 4540 4541 if (tx) { 4542 bool tx_link_found = false; 4543 4544 for (link_id = 0; 4545 link_id < ARRAY_SIZE(sdata->link); 4546 link_id++) { 4547 struct ieee80211_link_data *link; 4548 4549 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4550 continue; 4551 4552 link = sdata_dereference(sdata->link[link_id], sdata); 4553 if (WARN_ON_ONCE(!link)) 4554 continue; 4555 4556 if (link->u.mgd.csa.blocked_tx) 4557 continue; 4558 4559 tx_link_found = true; 4560 break; 4561 } 4562 4563 tx = tx_link_found; 4564 } 4565 4566 /* other links will be destroyed */ 4567 sdata->deflink.conf->bss = NULL; 4568 sdata->deflink.conf->epcs_support = false; 4569 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4570 4571 netif_carrier_off(sdata->dev); 4572 4573 /* 4574 * if we want to get out of ps before disassoc (why?) we have 4575 * to do it before sending disassoc, as otherwise the null-packet 4576 * won't be valid. 4577 */ 4578 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4579 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4580 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4581 } 4582 local->ps_sdata = NULL; 4583 4584 /* disable per-vif ps */ 4585 ieee80211_recalc_ps_vif(sdata); 4586 4587 /* make sure ongoing transmission finishes */ 4588 synchronize_net(); 4589 4590 /* 4591 * drop any frame before deauth/disassoc, this can be data or 4592 * management frame. Since we are disconnecting, we should not 4593 * insist sending these frames which can take time and delay 4594 * the disconnection and possible the roaming. 4595 */ 4596 ieee80211_flush_queues(local, sdata, true); 4597 4598 if (tx) { 4599 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4600 4601 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4602 sdata->vif.cfg.ap_addr, stype, 4603 reason, true, frame_buf); 4604 4605 /* flush out frame - make sure the deauth was actually sent */ 4606 ieee80211_flush_queues(local, sdata, false); 4607 4608 drv_mgd_complete_tx(sdata->local, sdata, &info); 4609 } else if (frame_buf) { 4610 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4611 sdata->vif.cfg.ap_addr, stype, 4612 reason, false, frame_buf); 4613 } 4614 4615 /* clear AP addr only after building the needed mgmt frames */ 4616 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4617 eth_zero_addr(sdata->vif.cfg.ap_addr); 4618 4619 sdata->vif.cfg.ssid_len = 0; 4620 4621 /* Remove TDLS peers */ 4622 __sta_info_flush(sdata, false, -1, ap_sta); 4623 4624 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4625 /* Only move the AP state */ 4626 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4627 } else { 4628 /* Remove AP peer */ 4629 sta_info_flush(sdata, -1); 4630 } 4631 4632 /* finally reset all BSS / config parameters */ 4633 if (!ieee80211_vif_is_mld(&sdata->vif)) 4634 changed |= ieee80211_reset_erp_info(sdata); 4635 4636 ieee80211_led_assoc(local, 0); 4637 changed |= BSS_CHANGED_ASSOC; 4638 sdata->vif.cfg.assoc = false; 4639 4640 sdata->deflink.u.mgd.p2p_noa_index = -1; 4641 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4642 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4643 4644 /* on the next assoc, re-program HT/VHT parameters */ 4645 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4646 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4647 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4648 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4649 4650 /* 4651 * reset MU-MIMO ownership and group data in default link, 4652 * if used, other links are destroyed 4653 */ 4654 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4655 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4656 memset(sdata->vif.bss_conf.mu_group.position, 0, 4657 sizeof(sdata->vif.bss_conf.mu_group.position)); 4658 if (!ieee80211_vif_is_mld(&sdata->vif)) 4659 changed |= BSS_CHANGED_MU_GROUPS; 4660 sdata->vif.bss_conf.mu_mimo_owner = false; 4661 4662 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4663 4664 timer_delete_sync(&local->dynamic_ps_timer); 4665 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4666 4667 /* Disable ARP filtering */ 4668 if (sdata->vif.cfg.arp_addr_cnt) 4669 changed |= BSS_CHANGED_ARP_FILTER; 4670 4671 sdata->vif.bss_conf.qos = false; 4672 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4673 changed |= BSS_CHANGED_QOS; 4674 /* The BSSID (not really interesting) and HT changed */ 4675 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4676 ieee80211_bss_info_change_notify(sdata, changed); 4677 } else { 4678 ieee80211_vif_cfg_change_notify(sdata, changed); 4679 } 4680 4681 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4682 /* 4683 * After notifying the driver about the disassoc, 4684 * remove the ap sta. 4685 */ 4686 sta_info_flush(sdata, -1); 4687 } 4688 4689 /* disassociated - set to defaults now */ 4690 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4691 4692 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4693 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4694 timer_delete_sync(&sdata->u.mgd.timer); 4695 4696 sdata->vif.bss_conf.dtim_period = 0; 4697 sdata->vif.bss_conf.beacon_rate = NULL; 4698 4699 sdata->deflink.u.mgd.have_beacon = false; 4700 sdata->deflink.u.mgd.tracking_signal_avg = false; 4701 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4702 4703 ifmgd->flags = 0; 4704 4705 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4706 struct ieee80211_link_data *link; 4707 4708 link = sdata_dereference(sdata->link[link_id], sdata); 4709 if (!link) 4710 continue; 4711 ieee80211_link_release_channel(link); 4712 } 4713 4714 sdata->vif.bss_conf.csa_active = false; 4715 sdata->deflink.u.mgd.csa.blocked_tx = false; 4716 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4717 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4718 ieee80211_vif_unblock_queues_csa(sdata); 4719 4720 /* existing TX TSPEC sessions no longer exist */ 4721 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4722 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4723 4724 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4725 sdata->vif.bss_conf.pwr_reduction = 0; 4726 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4727 4728 sdata->vif.cfg.eml_cap = 0; 4729 sdata->vif.cfg.eml_med_sync_delay = 0; 4730 sdata->vif.cfg.mld_capa_op = 0; 4731 4732 memset(&sdata->u.mgd.ttlm_info, 0, 4733 sizeof(sdata->u.mgd.ttlm_info)); 4734 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4735 4736 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4737 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4738 &ifmgd->neg_ttlm_timeout_work); 4739 4740 sdata->u.mgd.removed_links = 0; 4741 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4742 &sdata->u.mgd.ml_reconf_work); 4743 4744 wiphy_work_cancel(sdata->local->hw.wiphy, 4745 &ifmgd->teardown_ttlm_work); 4746 4747 /* if disconnection happens in the middle of the ML reconfiguration 4748 * flow, cfg80211 must called to release the BSS references obtained 4749 * when the flow started. 4750 */ 4751 ieee80211_ml_reconf_reset(sdata); 4752 4753 ieee80211_vif_set_links(sdata, 0, 0); 4754 4755 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4756 4757 ifmgd->epcs.enabled = false; 4758 ifmgd->epcs.dialog_token = 0; 4759 4760 memset(ifmgd->userspace_selectors, 0, 4761 sizeof(ifmgd->userspace_selectors)); 4762 4763 ifmgd->uhr_omp.pending = 0; 4764 ifmgd->uhr_omp.pending_init = 0; 4765 } 4766 4767 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4768 { 4769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4770 struct ieee80211_local *local = sdata->local; 4771 4772 lockdep_assert_wiphy(local->hw.wiphy); 4773 4774 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4775 return; 4776 4777 __ieee80211_stop_poll(sdata); 4778 4779 ieee80211_recalc_ps(local); 4780 4781 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4782 return; 4783 4784 /* 4785 * We've received a probe response, but are not sure whether 4786 * we have or will be receiving any beacons or data, so let's 4787 * schedule the timers again, just in case. 4788 */ 4789 ieee80211_sta_reset_beacon_monitor(sdata); 4790 4791 mod_timer(&ifmgd->conn_mon_timer, 4792 round_jiffies_up(jiffies + 4793 IEEE80211_CONNECTION_IDLE_TIME)); 4794 } 4795 4796 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4797 struct ieee80211_hdr *hdr, 4798 u16 tx_time) 4799 { 4800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4801 u16 tid; 4802 int ac; 4803 struct ieee80211_sta_tx_tspec *tx_tspec; 4804 unsigned long now = jiffies; 4805 4806 if (!ieee80211_is_data_qos(hdr->frame_control)) 4807 return; 4808 4809 tid = ieee80211_get_tid(hdr); 4810 ac = ieee80211_ac_from_tid(tid); 4811 tx_tspec = &ifmgd->tx_tspec[ac]; 4812 4813 if (likely(!tx_tspec->admitted_time)) 4814 return; 4815 4816 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4817 tx_tspec->consumed_tx_time = 0; 4818 tx_tspec->time_slice_start = now; 4819 4820 if (tx_tspec->downgraded) { 4821 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4822 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4823 &ifmgd->tx_tspec_wk, 0); 4824 } 4825 } 4826 4827 if (tx_tspec->downgraded) 4828 return; 4829 4830 tx_tspec->consumed_tx_time += tx_time; 4831 4832 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4833 tx_tspec->downgraded = true; 4834 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4835 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4836 &ifmgd->tx_tspec_wk, 0); 4837 } 4838 } 4839 4840 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4841 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4842 { 4843 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4844 4845 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4846 !sdata->u.mgd.probe_send_count) 4847 return; 4848 4849 if (ack) 4850 sdata->u.mgd.probe_send_count = 0; 4851 else 4852 sdata->u.mgd.nullfunc_failed = true; 4853 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4854 } 4855 4856 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4857 const u8 *src, const u8 *dst, 4858 const u8 *ssid, size_t ssid_len, 4859 struct ieee80211_channel *channel) 4860 { 4861 struct sk_buff *skb; 4862 4863 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4864 ssid, ssid_len, NULL, 0, 4865 IEEE80211_PROBE_FLAG_DIRECTED); 4866 if (skb) 4867 ieee80211_tx_skb(sdata, skb); 4868 } 4869 4870 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4871 { 4872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4873 u8 *dst = sdata->vif.cfg.ap_addr; 4874 u8 unicast_limit = max(1, max_probe_tries - 3); 4875 struct sta_info *sta; 4876 4877 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4878 4879 /* 4880 * Try sending broadcast probe requests for the last three 4881 * probe requests after the first ones failed since some 4882 * buggy APs only support broadcast probe requests. 4883 */ 4884 if (ifmgd->probe_send_count >= unicast_limit) 4885 dst = NULL; 4886 4887 /* 4888 * When the hardware reports an accurate Tx ACK status, it's 4889 * better to send a nullfunc frame instead of a probe request, 4890 * as it will kick us off the AP quickly if we aren't associated 4891 * anymore. The timeout will be reset if the frame is ACKed by 4892 * the AP. 4893 */ 4894 ifmgd->probe_send_count++; 4895 4896 if (dst) { 4897 sta = sta_info_get(sdata, dst); 4898 if (!WARN_ON(!sta)) 4899 ieee80211_check_fast_rx(sta); 4900 } 4901 4902 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4903 ifmgd->nullfunc_failed = false; 4904 ieee80211_send_nullfunc(sdata->local, sdata, false); 4905 } else { 4906 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4907 sdata->vif.cfg.ssid, 4908 sdata->vif.cfg.ssid_len, 4909 sdata->deflink.conf->bss->channel); 4910 } 4911 4912 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4913 run_again(sdata, ifmgd->probe_timeout); 4914 } 4915 4916 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4917 bool beacon) 4918 { 4919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4920 bool already = false; 4921 4922 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4923 4924 if (!ieee80211_sdata_running(sdata)) 4925 return; 4926 4927 if (!ifmgd->associated) 4928 return; 4929 4930 if (sdata->local->tmp_channel || sdata->local->scanning) 4931 return; 4932 4933 if (sdata->local->suspending) { 4934 /* reschedule after resume */ 4935 ieee80211_reset_ap_probe(sdata); 4936 return; 4937 } 4938 4939 if (beacon) { 4940 mlme_dbg_ratelimited(sdata, 4941 "detected beacon loss from AP (missed %d beacons) - probing\n", 4942 beacon_loss_count); 4943 4944 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4945 } 4946 4947 /* 4948 * The driver/our work has already reported this event or the 4949 * connection monitoring has kicked in and we have already sent 4950 * a probe request. Or maybe the AP died and the driver keeps 4951 * reporting until we disassociate... 4952 * 4953 * In either case we have to ignore the current call to this 4954 * function (except for setting the correct probe reason bit) 4955 * because otherwise we would reset the timer every time and 4956 * never check whether we received a probe response! 4957 */ 4958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4959 already = true; 4960 4961 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4962 4963 if (already) 4964 return; 4965 4966 ieee80211_recalc_ps(sdata->local); 4967 4968 ifmgd->probe_send_count = 0; 4969 ieee80211_mgd_probe_ap_send(sdata); 4970 } 4971 4972 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4973 struct ieee80211_vif *vif) 4974 { 4975 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4977 struct cfg80211_bss *cbss; 4978 struct sk_buff *skb; 4979 const struct element *ssid; 4980 int ssid_len; 4981 4982 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4983 4984 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4985 ieee80211_vif_is_mld(&sdata->vif))) 4986 return NULL; 4987 4988 if (ifmgd->associated) 4989 cbss = sdata->deflink.conf->bss; 4990 else if (ifmgd->auth_data) 4991 cbss = ifmgd->auth_data->bss; 4992 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4993 cbss = ifmgd->assoc_data->link[0].bss; 4994 else 4995 return NULL; 4996 4997 rcu_read_lock(); 4998 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4999 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 5000 "invalid SSID element (len=%d)", 5001 ssid ? ssid->datalen : -1)) 5002 ssid_len = 0; 5003 else 5004 ssid_len = ssid->datalen; 5005 5006 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 5007 (u32) -1, cbss->channel, 5008 ssid->data, ssid_len, 5009 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 5010 rcu_read_unlock(); 5011 5012 return skb; 5013 } 5014 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 5015 5016 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 5017 const u8 *buf, size_t len, bool tx, 5018 u16 reason, bool reconnect) 5019 { 5020 struct ieee80211_event event = { 5021 .type = MLME_EVENT, 5022 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 5023 .u.mlme.reason = reason, 5024 }; 5025 5026 if (tx) 5027 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 5028 else 5029 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 5030 5031 drv_event_callback(sdata->local, sdata, &event); 5032 } 5033 5034 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 5035 { 5036 struct ieee80211_local *local = sdata->local; 5037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5038 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 5039 5040 lockdep_assert_wiphy(local->hw.wiphy); 5041 5042 if (!ifmgd->associated) 5043 return; 5044 5045 if (!ifmgd->driver_disconnect) { 5046 unsigned int link_id; 5047 5048 /* 5049 * AP is probably out of range (or not reachable for another 5050 * reason) so remove the bss structs for that AP. In the case 5051 * of multi-link, it's not clear that all of them really are 5052 * out of range, but if they weren't the driver likely would 5053 * have switched to just have a single link active? 5054 */ 5055 for (link_id = 0; 5056 link_id < ARRAY_SIZE(sdata->link); 5057 link_id++) { 5058 struct ieee80211_link_data *link; 5059 5060 link = sdata_dereference(sdata->link[link_id], sdata); 5061 if (!link || !link->conf->bss) 5062 continue; 5063 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 5064 link->conf->bss = NULL; 5065 } 5066 } 5067 5068 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 5069 ifmgd->driver_disconnect ? 5070 WLAN_REASON_DEAUTH_LEAVING : 5071 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 5072 true, frame_buf); 5073 /* the other links will be destroyed */ 5074 sdata->vif.bss_conf.csa_active = false; 5075 sdata->deflink.u.mgd.csa.waiting_bcn = false; 5076 sdata->deflink.u.mgd.csa.blocked_tx = false; 5077 ieee80211_vif_unblock_queues_csa(sdata); 5078 5079 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5080 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 5081 ifmgd->reconnect); 5082 ifmgd->reconnect = false; 5083 } 5084 5085 static void ieee80211_uhr_omp_req_status(struct ieee80211_sub_if_data *sdata) 5086 { 5087 bool acked = sdata->u.mgd.uhr_omp.acked; 5088 u16 links = sdata->u.mgd.uhr_omp.links; 5089 struct ieee80211_link_data *link; 5090 struct sta_info *ap; 5091 5092 /* timer and queued RX could overlap */ 5093 if (!links) 5094 return; 5095 5096 sdata->u.mgd.uhr_omp.links = 0; 5097 sdata->u.mgd.uhr_omp.acked = false; 5098 5099 if (!acked) { 5100 sdata_dbg(sdata, "UHR OMP frame not ACKed - disconnect\n"); 5101 __ieee80211_disconnect(sdata); 5102 return; 5103 } 5104 5105 ap = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 5106 if (!ap) 5107 return; 5108 5109 for_each_link_data(sdata, link) { 5110 struct link_sta_info *link_sta; 5111 5112 if (!(links & BIT(link->link_id))) 5113 continue; 5114 5115 /* only handle transition to enabled for now */ 5116 if (!link->u.mgd.conn.dbe_enabled) 5117 continue; 5118 5119 link_sta = sdata_dereference(ap->link[link->link_id], sdata); 5120 if (WARN_ON(!link_sta)) 5121 continue; 5122 5123 link_sta->uhr_usable_tx_width = IEEE80211_STA_RX_BW_MAX; 5124 ieee80211_link_sta_update_rc_bw(link, link_sta); 5125 } 5126 5127 /* next round - send pending frames if needed */ 5128 5129 if (sdata->u.mgd.uhr_omp.pending_init) { 5130 links = sdata->u.mgd.uhr_omp.pending_init; 5131 5132 sdata->u.mgd.uhr_omp.pending_init = 0; 5133 ieee80211_send_uhr_omp_req_dbe(sdata, links, true); 5134 return; 5135 } 5136 5137 if (sdata->u.mgd.uhr_omp.pending) { 5138 links = sdata->u.mgd.uhr_omp.pending; 5139 5140 sdata->u.mgd.uhr_omp.pending = 0; 5141 ieee80211_send_uhr_omp_req_dbe(sdata, links, false); 5142 return; 5143 } 5144 } 5145 5146 static void ieee80211_uhr_omp_req_status_wk(struct wiphy *wiphy, 5147 struct wiphy_work *work) 5148 { 5149 struct ieee80211_sub_if_data *sdata = 5150 container_of(work, struct ieee80211_sub_if_data, 5151 u.mgd.uhr_omp.status_work.work); 5152 5153 ieee80211_uhr_omp_req_status(sdata); 5154 } 5155 5156 static void ieee80211_process_uhr_omp_resp(struct ieee80211_sub_if_data *sdata, 5157 struct ieee80211_mgmt *mgmt) 5158 { 5159 if (mgmt->u.action.uhr_link_reconf_notif.dialog_token != 5160 sdata->u.mgd.uhr_omp.dialog_token) 5161 return; 5162 5163 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 5164 &sdata->u.mgd.uhr_omp.status_work); 5165 ieee80211_uhr_omp_req_status(sdata); 5166 } 5167 5168 static void 5169 ieee80211_process_uhr_link_reconf_notif(struct ieee80211_sub_if_data *sdata, 5170 struct ieee80211_mgmt *mgmt, 5171 size_t len) 5172 { 5173 switch (mgmt->u.action.uhr_link_reconf_notif.type) { 5174 case IEEE80211_UHR_LINK_RECONFIG_NOTIFY_OMP_RESPONSE: 5175 ieee80211_process_uhr_omp_resp(sdata, mgmt); 5176 break; 5177 } 5178 } 5179 5180 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 5181 struct wiphy_work *work) 5182 { 5183 struct ieee80211_sub_if_data *sdata = 5184 container_of(work, struct ieee80211_sub_if_data, 5185 u.mgd.beacon_connection_loss_work); 5186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5187 5188 if (ifmgd->connection_loss) { 5189 sdata_info(sdata, "Connection to AP %pM lost\n", 5190 sdata->vif.cfg.ap_addr); 5191 __ieee80211_disconnect(sdata); 5192 ifmgd->connection_loss = false; 5193 } else if (ifmgd->driver_disconnect) { 5194 sdata_info(sdata, 5195 "Driver requested disconnection from AP %pM\n", 5196 sdata->vif.cfg.ap_addr); 5197 __ieee80211_disconnect(sdata); 5198 ifmgd->driver_disconnect = false; 5199 } else { 5200 if (ifmgd->associated) 5201 sdata->deflink.u.mgd.beacon_loss_count++; 5202 ieee80211_mgd_probe_ap(sdata, true); 5203 } 5204 } 5205 5206 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 5207 struct wiphy_work *work) 5208 { 5209 struct ieee80211_sub_if_data *sdata = 5210 container_of(work, struct ieee80211_sub_if_data, 5211 u.mgd.csa_connection_drop_work); 5212 5213 __ieee80211_disconnect(sdata); 5214 } 5215 5216 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 5217 { 5218 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5219 struct ieee80211_hw *hw = &sdata->local->hw; 5220 5221 trace_api_beacon_loss(sdata); 5222 5223 sdata->u.mgd.connection_loss = false; 5224 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 5225 } 5226 EXPORT_SYMBOL(ieee80211_beacon_loss); 5227 5228 void ieee80211_connection_loss(struct ieee80211_vif *vif) 5229 { 5230 struct ieee80211_sub_if_data *sdata; 5231 struct ieee80211_hw *hw; 5232 5233 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 5234 5235 sdata = vif_to_sdata(vif); 5236 hw = &sdata->local->hw; 5237 5238 trace_api_connection_loss(sdata); 5239 5240 sdata->u.mgd.connection_loss = true; 5241 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 5242 } 5243 EXPORT_SYMBOL(ieee80211_connection_loss); 5244 5245 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 5246 { 5247 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5248 struct ieee80211_hw *hw = &sdata->local->hw; 5249 5250 trace_api_disconnect(sdata, reconnect); 5251 5252 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 5253 return; 5254 5255 sdata->u.mgd.driver_disconnect = true; 5256 sdata->u.mgd.reconnect = reconnect; 5257 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 5258 } 5259 EXPORT_SYMBOL(ieee80211_disconnect); 5260 5261 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 5262 bool assoc) 5263 { 5264 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 5265 5266 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5267 5268 sdata->u.mgd.auth_data = NULL; 5269 5270 if (!assoc) { 5271 /* 5272 * we are not authenticated yet, the only timer that could be 5273 * running is the timeout for the authentication response which 5274 * which is not relevant anymore. 5275 */ 5276 timer_delete_sync(&sdata->u.mgd.timer); 5277 sta_info_destroy_addr(sdata, auth_data->ap_addr); 5278 5279 /* other links are destroyed */ 5280 eth_zero_addr(sdata->deflink.u.mgd.bssid); 5281 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 5282 BSS_CHANGED_BSSID); 5283 sdata->u.mgd.flags = 0; 5284 5285 ieee80211_link_release_channel(&sdata->deflink); 5286 ieee80211_vif_set_links(sdata, 0, 0); 5287 } 5288 5289 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 5290 kfree(auth_data); 5291 } 5292 5293 enum assoc_status { 5294 ASSOC_SUCCESS, 5295 ASSOC_REJECTED, 5296 ASSOC_TIMEOUT, 5297 ASSOC_ABANDON, 5298 }; 5299 5300 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 5301 enum assoc_status status) 5302 { 5303 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 5304 5305 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5306 5307 sdata->u.mgd.assoc_data = NULL; 5308 5309 if (status != ASSOC_SUCCESS) { 5310 /* 5311 * we are not associated yet, the only timer that could be 5312 * running is the timeout for the association response which 5313 * which is not relevant anymore. 5314 */ 5315 timer_delete_sync(&sdata->u.mgd.timer); 5316 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 5317 5318 eth_zero_addr(sdata->deflink.u.mgd.bssid); 5319 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 5320 BSS_CHANGED_BSSID); 5321 sdata->u.mgd.flags = 0; 5322 sdata->vif.bss_conf.mu_mimo_owner = false; 5323 5324 if (status != ASSOC_REJECTED) { 5325 struct cfg80211_assoc_failure data = { 5326 .timeout = status == ASSOC_TIMEOUT, 5327 }; 5328 int i; 5329 5330 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 5331 ARRAY_SIZE(assoc_data->link)); 5332 5333 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 5334 data.bss[i] = assoc_data->link[i].bss; 5335 5336 if (ieee80211_vif_is_mld(&sdata->vif)) 5337 data.ap_mld_addr = assoc_data->ap_addr; 5338 5339 cfg80211_assoc_failure(sdata->dev, &data); 5340 } 5341 5342 ieee80211_link_release_channel(&sdata->deflink); 5343 ieee80211_vif_set_links(sdata, 0, 0); 5344 } 5345 5346 kfree(assoc_data); 5347 } 5348 5349 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 5350 struct ieee80211_mgmt *mgmt, size_t len) 5351 { 5352 struct ieee80211_local *local = sdata->local; 5353 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 5354 const struct element *challenge; 5355 u8 *pos; 5356 u32 tx_flags = 0; 5357 struct ieee80211_prep_tx_info info = { 5358 .subtype = IEEE80211_STYPE_AUTH, 5359 .link_id = auth_data->link_id, 5360 }; 5361 5362 pos = mgmt->u.auth.variable; 5363 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 5364 len - (pos - (u8 *)mgmt)); 5365 if (!challenge) 5366 return; 5367 auth_data->expected_transaction = 4; 5368 drv_mgd_prepare_tx(sdata->local, sdata, &info); 5369 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 5370 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 5371 IEEE80211_TX_INTFL_MLME_CONN_TX; 5372 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 5373 (void *)challenge, 5374 challenge->datalen + sizeof(*challenge), 5375 auth_data->ap_addr, auth_data->ap_addr, 5376 auth_data->key, auth_data->key_len, 5377 auth_data->key_idx, tx_flags); 5378 } 5379 5380 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 5381 { 5382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5383 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 5384 struct sta_info *sta; 5385 5386 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5387 5388 sdata_info(sdata, "authenticated\n"); 5389 ifmgd->auth_data->done = true; 5390 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 5391 ifmgd->auth_data->timeout_started = true; 5392 run_again(sdata, ifmgd->auth_data->timeout); 5393 5394 /* move station state to auth */ 5395 sta = sta_info_get(sdata, ap_addr); 5396 if (!sta) { 5397 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 5398 return false; 5399 } 5400 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 5401 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 5402 return false; 5403 } 5404 5405 return true; 5406 } 5407 5408 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 5409 struct ieee80211_mgmt *mgmt, size_t len) 5410 { 5411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5412 u16 auth_alg, auth_transaction, status_code, encap_len; 5413 struct ieee80211_event event = { 5414 .type = MLME_EVENT, 5415 .u.mlme.data = AUTH_EVENT, 5416 }; 5417 struct ieee80211_prep_tx_info info = { 5418 .subtype = IEEE80211_STYPE_AUTH, 5419 }; 5420 bool sae_need_confirm = false; 5421 bool auth_fail = false; 5422 5423 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5424 5425 if (len < 24 + 6) 5426 return; 5427 5428 if (!ifmgd->auth_data || ifmgd->auth_data->done) 5429 return; 5430 5431 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 5432 return; 5433 5434 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 5435 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 5436 status_code = le16_to_cpu(mgmt->u.auth.status_code); 5437 5438 /* 5439 * IEEE 802.1X Authentication: 5440 * Header + Authentication Algorithm Number(2 byte) + Authentication 5441 * Transaction Sequence Number(2 byte) + Status Code(2 byte) + 5442 * Encapsulation Length(2 byte). 5443 */ 5444 if (auth_alg == WLAN_AUTH_IEEE8021X && len < 24 + 8) 5445 return; 5446 5447 info.link_id = ifmgd->auth_data->link_id; 5448 5449 if (auth_alg != ifmgd->auth_data->algorithm || 5450 (auth_alg != WLAN_AUTH_SAE && 5451 auth_transaction != ifmgd->auth_data->expected_transaction) || 5452 (auth_alg == WLAN_AUTH_SAE && 5453 (auth_transaction < ifmgd->auth_data->expected_transaction || 5454 auth_transaction > 2))) { 5455 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 5456 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 5457 auth_transaction, 5458 ifmgd->auth_data->expected_transaction); 5459 goto notify_driver; 5460 } 5461 5462 switch (auth_alg) { 5463 case WLAN_AUTH_IEEE8021X: 5464 if (status_code != WLAN_STATUS_SUCCESS && 5465 status_code != WLAN_STATUS_8021X_AUTH_SUCCESS) 5466 auth_fail = true; 5467 5468 if (!auth_fail) { 5469 /* Indicates length of encapsulated EAPOL PDU */ 5470 encap_len = get_unaligned_le16(mgmt->u.auth.variable); 5471 } 5472 break; 5473 default: 5474 if (status_code != WLAN_STATUS_SUCCESS) 5475 auth_fail = true; 5476 break; 5477 } 5478 5479 if (auth_fail) { 5480 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5481 5482 if (auth_alg == WLAN_AUTH_SAE && 5483 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 5484 (auth_transaction == 1 && 5485 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 5486 status_code == WLAN_STATUS_SAE_PK)))) { 5487 /* waiting for userspace now */ 5488 ifmgd->auth_data->waiting = true; 5489 ifmgd->auth_data->timeout = 5490 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 5491 ifmgd->auth_data->timeout_started = true; 5492 run_again(sdata, ifmgd->auth_data->timeout); 5493 if (auth_transaction == 1) 5494 sae_need_confirm = true; 5495 goto notify_driver; 5496 } 5497 5498 sdata_info(sdata, "%pM denied authentication (status %d)\n", 5499 mgmt->sa, status_code); 5500 ieee80211_destroy_auth_data(sdata, false); 5501 event.u.mlme.status = MLME_DENIED; 5502 event.u.mlme.reason = status_code; 5503 drv_event_callback(sdata->local, sdata, &event); 5504 goto notify_driver; 5505 } 5506 5507 switch (ifmgd->auth_data->algorithm) { 5508 case WLAN_AUTH_OPEN: 5509 case WLAN_AUTH_LEAP: 5510 case WLAN_AUTH_FT: 5511 case WLAN_AUTH_SAE: 5512 case WLAN_AUTH_FILS_SK: 5513 case WLAN_AUTH_FILS_SK_PFS: 5514 case WLAN_AUTH_FILS_PK: 5515 case WLAN_AUTH_EPPKE: 5516 case WLAN_AUTH_IEEE8021X: 5517 break; 5518 case WLAN_AUTH_SHARED_KEY: 5519 if (ifmgd->auth_data->expected_transaction != 4) { 5520 ieee80211_auth_challenge(sdata, mgmt, len); 5521 /* need another frame */ 5522 return; 5523 } 5524 break; 5525 default: 5526 WARN_ONCE(1, "invalid auth alg %d", 5527 ifmgd->auth_data->algorithm); 5528 goto notify_driver; 5529 } 5530 5531 event.u.mlme.status = MLME_SUCCESS; 5532 info.success = 1; 5533 drv_event_callback(sdata->local, sdata, &event); 5534 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 5535 (auth_transaction == 2 && 5536 ifmgd->auth_data->expected_transaction == 2)) { 5537 switch (ifmgd->auth_data->algorithm) { 5538 case WLAN_AUTH_IEEE8021X: 5539 /* 5540 * IEEE 802.1X authentication: 5541 * - When the full EAP handshake completes over the 5542 * Authentication process, the responder sets the 5543 * Status Code to WLAN_STATUS_8021X_AUTH_SUCCESS as 5544 * specified in "IEEE P802.11bi/D4.0, 12.16.5". 5545 * 5546 * - In the PMKSA caching case, only two Authentication 5547 * frames are exchanged if the responder (e.g., AP) 5548 * identifies a valid PMKSA, then as specified in 5549 * "IEEE P802.11bi/D4.0, 12.16.8.3", the responder 5550 * shall set the Status Code to SUCCESS in the final 5551 * Authentication frame and must not include an 5552 * encapsulated EAPOL PDU. 5553 * 5554 * Both conditions are treated as successful 5555 * authentication, so mark the state to Authenticated. 5556 */ 5557 if (status_code != WLAN_STATUS_8021X_AUTH_SUCCESS && 5558 !(status_code == WLAN_STATUS_SUCCESS && 5559 encap_len == 0)) 5560 break; 5561 fallthrough; 5562 default: 5563 if (!ieee80211_mark_sta_auth(sdata)) 5564 return; /* ignore frame -- wait for timeout */ 5565 5566 break; 5567 } 5568 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5569 auth_transaction == 1) { 5570 sae_need_confirm = true; 5571 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5572 auth_transaction == 2) { 5573 sdata_info(sdata, "SAE peer confirmed\n"); 5574 ifmgd->auth_data->peer_confirmed = true; 5575 } 5576 5577 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5578 notify_driver: 5579 if (!sae_need_confirm) 5580 drv_mgd_complete_tx(sdata->local, sdata, &info); 5581 } 5582 5583 #define case_WLAN(type) \ 5584 case WLAN_REASON_##type: return #type 5585 5586 const char *ieee80211_get_reason_code_string(u16 reason_code) 5587 { 5588 switch (reason_code) { 5589 case_WLAN(UNSPECIFIED); 5590 case_WLAN(PREV_AUTH_NOT_VALID); 5591 case_WLAN(DEAUTH_LEAVING); 5592 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 5593 case_WLAN(DISASSOC_AP_BUSY); 5594 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 5595 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 5596 case_WLAN(DISASSOC_STA_HAS_LEFT); 5597 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 5598 case_WLAN(DISASSOC_BAD_POWER); 5599 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 5600 case_WLAN(INVALID_IE); 5601 case_WLAN(MIC_FAILURE); 5602 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 5603 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 5604 case_WLAN(IE_DIFFERENT); 5605 case_WLAN(INVALID_GROUP_CIPHER); 5606 case_WLAN(INVALID_PAIRWISE_CIPHER); 5607 case_WLAN(INVALID_AKMP); 5608 case_WLAN(UNSUPP_RSN_VERSION); 5609 case_WLAN(INVALID_RSN_IE_CAP); 5610 case_WLAN(IEEE8021X_FAILED); 5611 case_WLAN(CIPHER_SUITE_REJECTED); 5612 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 5613 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 5614 case_WLAN(DISASSOC_LOW_ACK); 5615 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 5616 case_WLAN(QSTA_LEAVE_QBSS); 5617 case_WLAN(QSTA_NOT_USE); 5618 case_WLAN(QSTA_REQUIRE_SETUP); 5619 case_WLAN(QSTA_TIMEOUT); 5620 case_WLAN(QSTA_CIPHER_NOT_SUPP); 5621 case_WLAN(MESH_PEER_CANCELED); 5622 case_WLAN(MESH_MAX_PEERS); 5623 case_WLAN(MESH_CONFIG); 5624 case_WLAN(MESH_CLOSE); 5625 case_WLAN(MESH_MAX_RETRIES); 5626 case_WLAN(MESH_CONFIRM_TIMEOUT); 5627 case_WLAN(MESH_INVALID_GTK); 5628 case_WLAN(MESH_INCONSISTENT_PARAM); 5629 case_WLAN(MESH_INVALID_SECURITY); 5630 case_WLAN(MESH_PATH_ERROR); 5631 case_WLAN(MESH_PATH_NOFORWARD); 5632 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5633 case_WLAN(MAC_EXISTS_IN_MBSS); 5634 case_WLAN(MESH_CHAN_REGULATORY); 5635 case_WLAN(MESH_CHAN); 5636 default: return "<unknown>"; 5637 } 5638 } 5639 5640 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5641 struct ieee80211_mgmt *mgmt, size_t len) 5642 { 5643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5644 u16 reason_code; 5645 5646 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5647 5648 if (len < offsetofend(struct ieee80211_mgmt, u.deauth.reason_code)) 5649 return; 5650 5651 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5652 5653 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5654 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5655 return; 5656 } 5657 5658 if (ifmgd->associated && 5659 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5660 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5661 sdata->vif.cfg.ap_addr, reason_code, 5662 ieee80211_get_reason_code_string(reason_code)); 5663 5664 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5665 5666 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5667 reason_code, false); 5668 return; 5669 } 5670 5671 if (ifmgd->assoc_data && 5672 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5673 sdata_info(sdata, 5674 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5675 ifmgd->assoc_data->ap_addr, reason_code, 5676 ieee80211_get_reason_code_string(reason_code)); 5677 5678 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5679 5680 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5681 return; 5682 } 5683 } 5684 5685 5686 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5687 struct ieee80211_mgmt *mgmt, size_t len) 5688 { 5689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5690 u16 reason_code; 5691 5692 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5693 5694 if (len < 24 + 2) 5695 return; 5696 5697 if (!ifmgd->associated || 5698 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5699 return; 5700 5701 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5702 5703 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5704 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5705 return; 5706 } 5707 5708 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5709 sdata->vif.cfg.ap_addr, reason_code, 5710 ieee80211_get_reason_code_string(reason_code)); 5711 5712 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5713 5714 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5715 false); 5716 } 5717 5718 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5719 struct ieee80211_supported_band *sband, 5720 const struct link_sta_info *link_sta, 5721 const struct ieee802_11_elems *elems) 5722 { 5723 const struct ieee80211_sta_he_cap *own_he_cap = 5724 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5725 5726 if (elems->ext_capab_len < 10) 5727 return false; 5728 5729 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5730 return false; 5731 5732 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5733 IEEE80211_HE_MAC_CAP0_TWT_RES && 5734 own_he_cap && 5735 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5736 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5737 } 5738 5739 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5740 struct ieee80211_supported_band *sband, 5741 struct ieee80211_link_data *link, 5742 struct link_sta_info *link_sta, 5743 struct ieee802_11_elems *elems) 5744 { 5745 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5746 5747 if (link->conf->twt_requester != twt) { 5748 link->conf->twt_requester = twt; 5749 return BSS_CHANGED_TWT; 5750 } 5751 return 0; 5752 } 5753 5754 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5755 struct ieee80211_bss_conf *bss_conf, 5756 struct ieee80211_supported_band *sband, 5757 struct link_sta_info *link_sta) 5758 { 5759 const struct ieee80211_sta_he_cap *own_he_cap = 5760 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5761 5762 return bss_conf->he_support && 5763 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5764 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5765 own_he_cap && 5766 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5767 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5768 } 5769 5770 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5771 bool enabled) 5772 { 5773 /* in any case this is called, dialog token should be reset */ 5774 sdata->u.mgd.epcs.dialog_token = 0; 5775 5776 if (sdata->u.mgd.epcs.enabled == enabled) 5777 return; 5778 5779 sdata->u.mgd.epcs.enabled = enabled; 5780 cfg80211_epcs_changed(sdata->dev, enabled); 5781 } 5782 5783 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5784 { 5785 struct ieee80211_local *local = sdata->local; 5786 u8 link_id; 5787 5788 if (!sdata->u.mgd.epcs.enabled) 5789 return; 5790 5791 lockdep_assert_wiphy(local->hw.wiphy); 5792 5793 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5794 struct ieee802_11_elems *elems; 5795 struct ieee80211_link_data *link; 5796 const struct cfg80211_bss_ies *ies; 5797 bool ret; 5798 5799 rcu_read_lock(); 5800 5801 link = sdata_dereference(sdata->link[link_id], sdata); 5802 if (!link || !link->conf || !link->conf->bss) { 5803 rcu_read_unlock(); 5804 continue; 5805 } 5806 5807 if (link->u.mgd.disable_wmm_tracking) { 5808 rcu_read_unlock(); 5809 ieee80211_set_wmm_default(link, false, false); 5810 continue; 5811 } 5812 5813 ies = rcu_dereference(link->conf->bss->beacon_ies); 5814 if (!ies) { 5815 rcu_read_unlock(); 5816 ieee80211_set_wmm_default(link, false, false); 5817 continue; 5818 } 5819 5820 elems = ieee802_11_parse_elems(ies->data, ies->len, 5821 IEEE80211_FTYPE_MGMT | 5822 IEEE80211_STYPE_BEACON, 5823 NULL); 5824 if (!elems) { 5825 rcu_read_unlock(); 5826 ieee80211_set_wmm_default(link, false, false); 5827 continue; 5828 } 5829 5830 ret = _ieee80211_sta_wmm_params(local, link, 5831 elems->wmm_param, 5832 elems->wmm_param_len, 5833 elems->mu_edca_param_set); 5834 5835 kfree(elems); 5836 rcu_read_unlock(); 5837 5838 if (!ret) { 5839 ieee80211_set_wmm_default(link, false, false); 5840 continue; 5841 } 5842 5843 ieee80211_mgd_set_link_qos_params(link); 5844 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5845 } 5846 } 5847 5848 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5849 struct link_sta_info *link_sta, 5850 struct cfg80211_bss *cbss, 5851 struct ieee80211_mgmt *mgmt, 5852 const u8 *elem_start, 5853 unsigned int elem_len, 5854 u64 *changed) 5855 { 5856 struct ieee80211_sub_if_data *sdata = link->sdata; 5857 struct ieee80211_mgd_assoc_data *assoc_data = 5858 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5859 struct ieee80211_bss_conf *bss_conf = link->conf; 5860 struct ieee80211_local *local = sdata->local; 5861 unsigned int link_id = link->link_id; 5862 struct ieee80211_elems_parse_params parse_params = { 5863 .mode = link->u.mgd.conn.mode, 5864 .start = elem_start, 5865 .len = elem_len, 5866 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5867 .from_ap = true, 5868 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5869 }; 5870 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5871 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5872 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5873 const struct cfg80211_bss_ies *bss_ies = NULL; 5874 struct ieee80211_supported_band *sband; 5875 struct ieee802_11_elems *elems; 5876 const __le16 prof_bss_param_ch_present = 5877 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5878 u16 capab_info; 5879 bool ret; 5880 5881 elems = ieee802_11_parse_elems_full(&parse_params); 5882 if (!elems) 5883 return false; 5884 5885 if (link_id == assoc_data->assoc_link_id) { 5886 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5887 5888 /* 5889 * we should not get to this flow unless the association was 5890 * successful, so set the status directly to success 5891 */ 5892 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5893 if (elems->ml_basic) { 5894 int bss_param_ch_cnt = 5895 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5896 5897 if (bss_param_ch_cnt < 0) { 5898 ret = false; 5899 goto out; 5900 } 5901 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5902 bss_conf->bss_param_ch_cnt_link_id = link_id; 5903 } 5904 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5905 !elems->prof || 5906 !(elems->prof->control & prof_bss_param_ch_present)) { 5907 ret = false; 5908 goto out; 5909 } else { 5910 const u8 *ptr = elems->prof->variable + 5911 elems->prof->sta_info_len - 1; 5912 int bss_param_ch_cnt; 5913 5914 /* 5915 * During parsing, we validated that these fields exist, 5916 * otherwise elems->prof would have been set to NULL. 5917 */ 5918 capab_info = get_unaligned_le16(ptr); 5919 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5920 bss_param_ch_cnt = 5921 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5922 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5923 bss_conf->bss_param_ch_cnt_link_id = link_id; 5924 5925 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5926 link_info(link, "association response status code=%u\n", 5927 assoc_data->link[link_id].status); 5928 ret = true; 5929 goto out; 5930 } 5931 } 5932 5933 if (!is_s1g && !elems->supp_rates) { 5934 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5935 ret = false; 5936 goto out; 5937 } 5938 5939 link->u.mgd.tdls_chan_switch_prohibited = 5940 elems->ext_capab && elems->ext_capab_len >= 5 && 5941 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5942 5943 /* 5944 * Some APs are erroneously not including some information in their 5945 * (re)association response frames. Try to recover by using the data 5946 * from the beacon or probe response. This seems to afflict mobile 5947 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5948 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5949 */ 5950 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5951 ((assoc_data->wmm && !elems->wmm_param) || 5952 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5953 (!elems->ht_cap_elem || !elems->ht_operation)) || 5954 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5955 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5956 const struct cfg80211_bss_ies *ies; 5957 struct ieee802_11_elems *bss_elems; 5958 5959 rcu_read_lock(); 5960 ies = rcu_dereference(cbss->ies); 5961 if (ies) 5962 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5963 GFP_ATOMIC); 5964 rcu_read_unlock(); 5965 if (!bss_ies) { 5966 ret = false; 5967 goto out; 5968 } 5969 5970 parse_params.start = bss_ies->data; 5971 parse_params.len = bss_ies->len; 5972 parse_params.bss = cbss; 5973 parse_params.link_id = -1; 5974 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5975 if (!bss_elems) { 5976 ret = false; 5977 goto out; 5978 } 5979 5980 if (assoc_data->wmm && 5981 !elems->wmm_param && bss_elems->wmm_param) { 5982 elems->wmm_param = bss_elems->wmm_param; 5983 sdata_info(sdata, 5984 "AP bug: WMM param missing from AssocResp\n"); 5985 } 5986 5987 /* 5988 * Also check if we requested HT/VHT, otherwise the AP doesn't 5989 * have to include the IEs in the (re)association response. 5990 */ 5991 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5992 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5993 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5994 sdata_info(sdata, 5995 "AP bug: HT capability missing from AssocResp\n"); 5996 } 5997 if (!elems->ht_operation && bss_elems->ht_operation && 5998 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5999 elems->ht_operation = bss_elems->ht_operation; 6000 sdata_info(sdata, 6001 "AP bug: HT operation missing from AssocResp\n"); 6002 } 6003 6004 if (is_5ghz) { 6005 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 6006 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 6007 elems->vht_cap_elem = bss_elems->vht_cap_elem; 6008 sdata_info(sdata, 6009 "AP bug: VHT capa missing from AssocResp\n"); 6010 } 6011 6012 if (!elems->vht_operation && bss_elems->vht_operation && 6013 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 6014 elems->vht_operation = bss_elems->vht_operation; 6015 sdata_info(sdata, 6016 "AP bug: VHT operation missing from AssocResp\n"); 6017 } 6018 } 6019 kfree(bss_elems); 6020 } 6021 6022 /* 6023 * We previously checked these in the beacon/probe response, so 6024 * they should be present here. This is just a safety net. 6025 * Note that the ieee80211_config_bw() below would also check 6026 * for this (and more), but this has better error reporting. 6027 */ 6028 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 6029 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 6030 sdata_info(sdata, 6031 "HT AP is missing WMM params or HT capability/operation\n"); 6032 ret = false; 6033 goto out; 6034 } 6035 6036 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 6037 (!elems->vht_cap_elem || !elems->vht_operation)) { 6038 sdata_info(sdata, 6039 "VHT AP is missing VHT capability/operation\n"); 6040 ret = false; 6041 goto out; 6042 } 6043 6044 /* check/update if AP changed anything in assoc response vs. scan */ 6045 if (ieee80211_config_bw(link, elems, 6046 link_id == assoc_data->assoc_link_id, 6047 changed, 6048 le16_to_cpu(mgmt->frame_control) & 6049 IEEE80211_FCTL_STYPE)) { 6050 ret = false; 6051 goto out; 6052 } 6053 6054 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 6055 ret = false; 6056 goto out; 6057 } 6058 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6059 6060 /* Set up internal HT/VHT capabilities */ 6061 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 6062 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, &sband->ht_cap, 6063 elems->ht_cap_elem, 6064 link_sta); 6065 6066 if (elems->vht_cap_elem && 6067 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 6068 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 6069 const struct cfg80211_bss_ies *ies; 6070 6071 /* 6072 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 6073 * too large maximum MPDU length in the association response 6074 * (indicating 12k) that it cannot actually process ... 6075 * Work around that. 6076 */ 6077 rcu_read_lock(); 6078 ies = rcu_dereference(cbss->ies); 6079 if (ies) { 6080 const struct element *elem; 6081 6082 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 6083 ies->data, ies->len); 6084 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 6085 bss_vht_cap = (const void *)elem->data; 6086 } 6087 6088 if (ieee80211_hw_check(&local->hw, STRICT) && 6089 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 6090 sizeof(*bss_vht_cap)))) { 6091 rcu_read_unlock(); 6092 ret = false; 6093 link_info(link, "VHT capabilities mismatch\n"); 6094 goto out; 6095 } 6096 6097 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 6098 &sband->vht_cap, 6099 elems->vht_cap_elem, 6100 bss_vht_cap, link_sta); 6101 rcu_read_unlock(); 6102 } 6103 6104 if (elems->he_operation && 6105 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 6106 elems->he_cap) { 6107 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 6108 elems->he_cap, 6109 elems->he_cap_len, 6110 elems->he_6ghz_capa, 6111 link_sta); 6112 6113 bss_conf->he_support = link_sta->pub->he_cap.has_he; 6114 if (elems->rsnx && elems->rsnx_len && 6115 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 6116 wiphy_ext_feature_isset(local->hw.wiphy, 6117 NL80211_EXT_FEATURE_PROTECTED_TWT)) 6118 bss_conf->twt_protected = true; 6119 else 6120 bss_conf->twt_protected = false; 6121 6122 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 6123 link_sta, elems); 6124 6125 if (elems->eht_operation && elems->eht_cap && 6126 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 6127 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 6128 elems->he_cap, 6129 elems->he_cap_len, 6130 elems->eht_cap, 6131 elems->eht_cap_len, 6132 link_sta); 6133 6134 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 6135 bss_conf->epcs_support = bss_conf->eht_support && 6136 !!(elems->eht_cap->fixed.mac_cap_info[0] & 6137 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 6138 6139 /* EPCS might be already enabled but a new added link 6140 * does not support EPCS. This should not really happen 6141 * in practice. 6142 */ 6143 if (sdata->u.mgd.epcs.enabled && 6144 !bss_conf->epcs_support) 6145 ieee80211_epcs_teardown(sdata); 6146 } else { 6147 bss_conf->eht_support = false; 6148 bss_conf->epcs_support = false; 6149 } 6150 } else { 6151 bss_conf->he_support = false; 6152 bss_conf->twt_requester = false; 6153 bss_conf->twt_protected = false; 6154 bss_conf->eht_support = false; 6155 bss_conf->epcs_support = false; 6156 } 6157 6158 if (elems->uhr_operation && elems->uhr_cap && 6159 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_UHR) { 6160 int omp_to_us; 6161 6162 ieee80211_uhr_cap_ie_to_sta_uhr_cap(sdata, sband, 6163 elems->uhr_cap, 6164 elems->uhr_cap_len, 6165 link_sta); 6166 6167 bss_conf->uhr_support = link_sta->pub->uhr_cap.has_uhr; 6168 6169 /* 6170 * This assumes that the timeout is the same across all links, 6171 * maybe we should actually validate that. 6172 */ 6173 omp_to_us = ieee80211_uhr_capa_get_om_pu_to_us(elems->uhr_cap); 6174 if (omp_to_us < 0) { 6175 ret = false; 6176 link_info(link, "Invalid UHR OMP timeout\n"); 6177 goto out; 6178 } 6179 6180 sdata->u.mgd.uhr_omp.timeout_us = omp_to_us; 6181 } else { 6182 bss_conf->uhr_support = false; 6183 } 6184 6185 if (elems->s1g_oper && 6186 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 6187 elems->s1g_capab) 6188 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 6189 link_sta); 6190 6191 bss_conf->twt_broadcast = 6192 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 6193 6194 if (bss_conf->he_support) { 6195 bss_conf->he_bss_color.color = 6196 le32_get_bits(elems->he_operation->he_oper_params, 6197 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 6198 bss_conf->he_bss_color.partial = 6199 le32_get_bits(elems->he_operation->he_oper_params, 6200 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 6201 bss_conf->he_bss_color.enabled = 6202 !le32_get_bits(elems->he_operation->he_oper_params, 6203 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 6204 6205 if (bss_conf->he_bss_color.enabled) 6206 *changed |= BSS_CHANGED_HE_BSS_COLOR; 6207 6208 bss_conf->htc_trig_based_pkt_ext = 6209 le32_get_bits(elems->he_operation->he_oper_params, 6210 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 6211 bss_conf->frame_time_rts_th = 6212 le32_get_bits(elems->he_operation->he_oper_params, 6213 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 6214 6215 bss_conf->uora_exists = !!elems->uora_element; 6216 if (elems->uora_element) 6217 bss_conf->uora_ocw_range = elems->uora_element[0]; 6218 6219 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 6220 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 6221 /* TODO: OPEN: what happens if BSS color disable is set? */ 6222 } 6223 6224 if (cbss->transmitted_bss) { 6225 bss_conf->nontransmitted = true; 6226 ether_addr_copy(bss_conf->transmitter_bssid, 6227 cbss->transmitted_bss->bssid); 6228 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 6229 bss_conf->bssid_index = cbss->bssid_index; 6230 } 6231 6232 /* 6233 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 6234 * in their association response, so ignore that data for our own 6235 * configuration. If it changed since the last beacon, we'll get the 6236 * next beacon and update then. 6237 */ 6238 6239 ieee80211_sta_init_nss_bw_capa(link_sta, &bss_conf->chanreq.oper); 6240 6241 /* If an operating mode notification element is present, use it. */ 6242 if (elems->opmode_notif) 6243 __ieee80211_vht_handle_opmode(sdata, link_sta, 6244 *elems->opmode_notif, 6245 sband->band); 6246 6247 /* 6248 * Always handle WMM once after association regardless 6249 * of the first value the AP uses. Setting -1 here has 6250 * that effect because the AP values is an unsigned 6251 * 4-bit value. 6252 */ 6253 link->u.mgd.wmm_last_param_set = -1; 6254 link->u.mgd.mu_edca_last_param_set = -1; 6255 6256 if (link->u.mgd.disable_wmm_tracking) { 6257 ieee80211_set_wmm_default(link, false, false); 6258 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6259 elems->wmm_param_len, 6260 elems->mu_edca_param_set)) { 6261 /* still enable QoS since we might have HT/VHT */ 6262 ieee80211_set_wmm_default(link, false, true); 6263 /* disable WMM tracking in this case to disable 6264 * tracking WMM parameter changes in the beacon if 6265 * the parameters weren't actually valid. Doing so 6266 * avoids changing parameters very strangely when 6267 * the AP is going back and forth between valid and 6268 * invalid parameters. 6269 */ 6270 link->u.mgd.disable_wmm_tracking = true; 6271 } 6272 6273 if (elems->max_idle_period_ie) { 6274 bss_conf->max_idle_period = 6275 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 6276 bss_conf->protected_keep_alive = 6277 !!(elems->max_idle_period_ie->idle_options & 6278 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 6279 *changed |= BSS_CHANGED_KEEP_ALIVE; 6280 } else { 6281 bss_conf->max_idle_period = 0; 6282 bss_conf->protected_keep_alive = false; 6283 } 6284 6285 /* set assoc capability (AID was already set earlier), 6286 * ieee80211_set_associated() will tell the driver */ 6287 bss_conf->assoc_capability = capab_info; 6288 6289 ret = true; 6290 out: 6291 kfree(elems); 6292 kfree(bss_ies); 6293 return ret; 6294 } 6295 6296 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 6297 struct sta_info *sta, 6298 struct link_sta_info *link_sta, 6299 struct cfg80211_bss *cbss) 6300 { 6301 struct ieee80211_sub_if_data *sdata = link->sdata; 6302 struct ieee80211_local *local = sdata->local; 6303 struct ieee80211_bss *bss = (void *)cbss->priv; 6304 u32 rates = 0, basic_rates = 0; 6305 bool have_higher_than_11mbit = false; 6306 int min_rate = INT_MAX, min_rate_index = -1; 6307 struct ieee80211_supported_band *sband; 6308 6309 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 6310 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 6311 6312 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 6313 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 6314 ieee80211_s1g_sta_rate_init(sta); 6315 return 0; 6316 } 6317 6318 sband = local->hw.wiphy->bands[cbss->channel->band]; 6319 6320 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 6321 NULL, 0, 6322 &rates, &basic_rates, NULL, 6323 &have_higher_than_11mbit, 6324 &min_rate, &min_rate_index); 6325 6326 /* 6327 * This used to be a workaround for basic rates missing 6328 * in the association response frame. Now that we no 6329 * longer use the basic rates from there, it probably 6330 * doesn't happen any more, but keep the workaround so 6331 * in case some *other* APs are buggy in different ways 6332 * we can connect -- with a warning. 6333 * Allow this workaround only in case the AP provided at least 6334 * one rate. 6335 */ 6336 if (min_rate_index < 0) { 6337 link_info(link, "No legacy rates in association response\n"); 6338 return -EINVAL; 6339 } else if (!basic_rates) { 6340 link_info(link, "No basic rates, using min rate instead\n"); 6341 basic_rates = BIT(min_rate_index); 6342 } 6343 6344 if (rates) 6345 link_sta->pub->supp_rates[cbss->channel->band] = rates; 6346 else 6347 link_info(link, "No rates found, keeping mandatory only\n"); 6348 6349 link->conf->basic_rates = basic_rates; 6350 6351 /* cf. IEEE 802.11 9.2.12 */ 6352 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 6353 have_higher_than_11mbit; 6354 6355 return 0; 6356 } 6357 6358 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 6359 struct cfg80211_bss *cbss) 6360 { 6361 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 6362 const struct element *ht_cap_elem, *vht_cap_elem; 6363 const struct cfg80211_bss_ies *ies; 6364 const struct ieee80211_ht_cap *ht_cap; 6365 const struct ieee80211_vht_cap *vht_cap; 6366 const struct ieee80211_he_cap_elem *he_cap; 6367 const struct element *he_cap_elem; 6368 u16 mcs_80_map, mcs_160_map; 6369 int i, mcs_nss_size; 6370 bool support_160; 6371 u8 chains = 1; 6372 6373 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 6374 return chains; 6375 6376 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 6377 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 6378 ht_cap = (void *)ht_cap_elem->data; 6379 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 6380 /* 6381 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 6382 * "Tx Unequal Modulation Supported" fields. 6383 */ 6384 } 6385 6386 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 6387 return chains; 6388 6389 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 6390 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 6391 u8 nss; 6392 u16 tx_mcs_map; 6393 6394 vht_cap = (void *)vht_cap_elem->data; 6395 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 6396 for (nss = 8; nss > 0; nss--) { 6397 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 6398 IEEE80211_VHT_MCS_NOT_SUPPORTED) 6399 break; 6400 } 6401 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 6402 chains = max(chains, nss); 6403 } 6404 6405 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 6406 return chains; 6407 6408 ies = rcu_dereference(cbss->ies); 6409 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 6410 ies->data, ies->len); 6411 6412 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 6413 return chains; 6414 6415 /* skip one byte ext_tag_id */ 6416 he_cap = (void *)(he_cap_elem->data + 1); 6417 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 6418 6419 /* invalid HE IE */ 6420 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 6421 return chains; 6422 6423 /* mcs_nss is right after he_cap info */ 6424 he_mcs_nss_supp = (void *)(he_cap + 1); 6425 6426 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 6427 6428 for (i = 7; i >= 0; i--) { 6429 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 6430 6431 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 6432 chains = max_t(u8, chains, i + 1); 6433 break; 6434 } 6435 } 6436 6437 support_160 = he_cap->phy_cap_info[0] & 6438 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 6439 6440 if (!support_160) 6441 return chains; 6442 6443 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 6444 for (i = 7; i >= 0; i--) { 6445 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 6446 6447 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 6448 chains = max_t(u8, chains, i + 1); 6449 break; 6450 } 6451 } 6452 6453 return chains; 6454 } 6455 6456 static void 6457 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 6458 struct ieee80211_supported_band *sband, 6459 struct cfg80211_assoc_request *req, 6460 bool wmm_used, int link_id, 6461 struct ieee80211_conn_settings *conn) 6462 { 6463 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 6464 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 6465 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 6466 const struct ieee80211_sta_he_cap *he_cap; 6467 const struct ieee80211_sta_eht_cap *eht_cap; 6468 const struct ieee80211_sta_uhr_cap *uhr_cap; 6469 struct ieee80211_sta_vht_cap vht_cap; 6470 6471 if (sband->band == NL80211_BAND_S1GHZ) { 6472 conn->mode = IEEE80211_CONN_MODE_S1G; 6473 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6474 mlme_dbg(sdata, "operating as S1G STA\n"); 6475 return; 6476 } 6477 6478 conn->mode = IEEE80211_CONN_MODE_LEGACY; 6479 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6480 6481 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6482 6483 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 6484 mlme_link_id_dbg(sdata, link_id, 6485 "HT disabled by flag, limiting to legacy\n"); 6486 goto out; 6487 } 6488 6489 if (!wmm_used) { 6490 mlme_link_id_dbg(sdata, link_id, 6491 "WMM/QoS not supported, limiting to legacy\n"); 6492 goto out; 6493 } 6494 6495 if (req) { 6496 unsigned int i; 6497 6498 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 6499 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6500 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6501 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6502 netdev_info(sdata->dev, 6503 "WEP/TKIP use, limiting to legacy\n"); 6504 goto out; 6505 } 6506 } 6507 } 6508 6509 if (!sta_ht_cap.ht_supported && !is_6ghz) { 6510 mlme_link_id_dbg(sdata, link_id, 6511 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 6512 goto out; 6513 } 6514 6515 /* HT is fine */ 6516 conn->mode = IEEE80211_CONN_MODE_HT; 6517 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 6518 IEEE80211_CONN_BW_LIMIT_40 : 6519 IEEE80211_CONN_BW_LIMIT_20; 6520 6521 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 6522 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 6523 6524 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 6525 mlme_link_id_dbg(sdata, link_id, 6526 "VHT disabled by flag, limiting to HT\n"); 6527 goto out; 6528 } 6529 6530 if (vht_cap.vht_supported && is_5ghz) { 6531 bool have_80mhz = false; 6532 unsigned int i; 6533 6534 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 6535 mlme_link_id_dbg(sdata, link_id, 6536 "no 40 MHz support on 5 GHz, limiting to HT\n"); 6537 goto out; 6538 } 6539 6540 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 6541 for (i = 0; i < sband->n_channels; i++) { 6542 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 6543 IEEE80211_CHAN_NO_80MHZ)) 6544 continue; 6545 6546 have_80mhz = true; 6547 break; 6548 } 6549 6550 if (!have_80mhz) { 6551 mlme_link_id_dbg(sdata, link_id, 6552 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 6553 goto out; 6554 } 6555 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 6556 mlme_link_id_dbg(sdata, link_id, 6557 "no VHT support on 5 GHz, limiting to HT\n"); 6558 goto out; 6559 } 6560 6561 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 6562 if (sband->band != NL80211_BAND_2GHZ) { 6563 conn->mode = IEEE80211_CONN_MODE_VHT; 6564 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 6565 } 6566 6567 if (is_5ghz && 6568 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 6569 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ | 6570 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) { 6571 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 6572 mlme_link_id_dbg(sdata, link_id, 6573 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 6574 } 6575 6576 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 6577 mlme_link_id_dbg(sdata, link_id, 6578 "HE disabled by flag, limiting to HT/VHT\n"); 6579 goto out; 6580 } 6581 6582 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 6583 if (!he_cap) { 6584 WARN_ON(is_6ghz); 6585 mlme_link_id_dbg(sdata, link_id, 6586 "no HE support, limiting to HT/VHT\n"); 6587 goto out; 6588 } 6589 6590 /* so we have HE */ 6591 conn->mode = IEEE80211_CONN_MODE_HE; 6592 6593 /* check bandwidth */ 6594 switch (sband->band) { 6595 default: 6596 case NL80211_BAND_2GHZ: 6597 if (he_cap->he_cap_elem.phy_cap_info[0] & 6598 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 6599 break; 6600 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6601 mlme_link_id_dbg(sdata, link_id, 6602 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 6603 break; 6604 case NL80211_BAND_5GHZ: 6605 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6606 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 6607 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6608 mlme_link_id_dbg(sdata, link_id, 6609 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 6610 break; 6611 } 6612 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6613 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 6614 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6615 conn->bw_limit, 6616 IEEE80211_CONN_BW_LIMIT_80); 6617 mlme_link_id_dbg(sdata, link_id, 6618 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 6619 } 6620 break; 6621 case NL80211_BAND_6GHZ: 6622 if (he_cap->he_cap_elem.phy_cap_info[0] & 6623 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 6624 break; 6625 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6626 conn->bw_limit, 6627 IEEE80211_CONN_BW_LIMIT_80); 6628 mlme_link_id_dbg(sdata, link_id, 6629 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 6630 break; 6631 } 6632 6633 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 6634 mlme_link_id_dbg(sdata, link_id, 6635 "EHT disabled by flag, limiting to HE\n"); 6636 goto out; 6637 } 6638 6639 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 6640 if (!eht_cap) { 6641 mlme_link_id_dbg(sdata, link_id, 6642 "no EHT support, limiting to HE\n"); 6643 goto out; 6644 } 6645 conn->mode = IEEE80211_CONN_MODE_EHT; 6646 6647 /* check bandwidth */ 6648 if (is_6ghz && 6649 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 6650 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 6651 else if (is_6ghz) 6652 mlme_link_id_dbg(sdata, link_id, 6653 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6654 6655 if (req && req->flags & ASSOC_REQ_DISABLE_UHR) { 6656 mlme_link_id_dbg(sdata, link_id, 6657 "UHR disabled by flag, limiting to EHT\n"); 6658 goto out; 6659 } 6660 6661 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 6662 if (!uhr_cap) { 6663 mlme_link_id_dbg(sdata, link_id, 6664 "no UHR support, limiting to EHT\n"); 6665 goto out; 6666 } 6667 conn->mode = IEEE80211_CONN_MODE_UHR; 6668 6669 out: 6670 mlme_link_id_dbg(sdata, link_id, 6671 "determined local STA to be %s, BW limited to %d MHz\n", 6672 ieee80211_conn_mode_str(conn->mode), 6673 20 * (1 << conn->bw_limit)); 6674 } 6675 6676 static void 6677 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6678 struct ieee80211_supported_band *sband, 6679 struct cfg80211_auth_request *req, 6680 bool wmm_used, 6681 struct ieee80211_conn_settings *conn) 6682 { 6683 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6684 req->link_id > 0 ? req->link_id : 0, 6685 conn); 6686 } 6687 6688 static void 6689 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6690 struct ieee80211_supported_band *sband, 6691 struct cfg80211_assoc_request *req, 6692 bool wmm_used, int link_id, 6693 struct ieee80211_conn_settings *conn) 6694 { 6695 struct ieee80211_conn_settings tmp; 6696 6697 WARN_ON(!req); 6698 6699 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6700 &tmp); 6701 6702 conn->mode = min_t(enum ieee80211_conn_mode, 6703 conn->mode, tmp.mode); 6704 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6705 conn->bw_limit, tmp.bw_limit); 6706 } 6707 6708 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6709 struct ieee80211_link_data *link, 6710 struct link_sta_info *link_sta, 6711 int link_id, 6712 struct cfg80211_bss *cbss, bool mlo, 6713 struct ieee80211_conn_settings *conn, 6714 unsigned long *userspace_selectors) 6715 { 6716 struct ieee80211_local *local = sdata->local; 6717 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6718 struct ieee80211_chan_req chanreq = {}; 6719 struct cfg80211_chan_def ap_chandef; 6720 struct ieee802_11_elems *elems; 6721 int ret; 6722 6723 lockdep_assert_wiphy(local->hw.wiphy); 6724 6725 rcu_read_lock(); 6726 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, 6727 link_sta, link_id, 6728 &chanreq, &ap_chandef, 6729 userspace_selectors); 6730 6731 if (IS_ERR(elems)) { 6732 rcu_read_unlock(); 6733 return PTR_ERR(elems); 6734 } 6735 6736 if (mlo && !elems->ml_basic) { 6737 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6738 rcu_read_unlock(); 6739 kfree(elems); 6740 return -EINVAL; 6741 } 6742 6743 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6744 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6745 6746 if (elems->pwr_constr_elem) 6747 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6748 6749 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6750 if (he_6ghz_oper) 6751 link->conf->power_type = 6752 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6753 cbss->channel->flags); 6754 else 6755 link_info(link, 6756 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6757 cbss->channel->center_freq); 6758 6759 link->conf->tpe = elems->tpe; 6760 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6761 &chanreq.oper); 6762 } 6763 rcu_read_unlock(); 6764 /* the element data was RCU protected so no longer valid anyway */ 6765 kfree(elems); 6766 elems = NULL; 6767 6768 if (!link) 6769 return 0; 6770 6771 rcu_read_lock(); 6772 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6773 local->rx_chains); 6774 rcu_read_unlock(); 6775 6776 /* 6777 * If this fails (possibly due to channel context sharing 6778 * on incompatible channels, e.g. 80+80 and 160 sharing the 6779 * same control channel) try to use a smaller bandwidth. 6780 */ 6781 ret = ieee80211_link_use_channel(link, &chanreq, 6782 IEEE80211_CHANCTX_SHARED); 6783 6784 /* don't downgrade for S1G channels, though. */ 6785 if (cfg80211_chandef_is_s1g(&chanreq.oper)) 6786 return ret; 6787 6788 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6789 ieee80211_chanreq_downgrade(&chanreq, conn); 6790 6791 ret = ieee80211_link_use_channel(link, &chanreq, 6792 IEEE80211_CHANCTX_SHARED); 6793 } 6794 6795 return ret; 6796 } 6797 6798 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6799 u8 *dtim_count, u8 *dtim_period) 6800 { 6801 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6802 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6803 ies->len); 6804 const struct ieee80211_tim_ie *tim = NULL; 6805 const struct ieee80211_bssid_index *idx; 6806 bool valid = tim_ie && tim_ie[1] >= 2; 6807 6808 if (valid) 6809 tim = (void *)(tim_ie + 2); 6810 6811 if (dtim_count) 6812 *dtim_count = valid ? tim->dtim_count : 0; 6813 6814 if (dtim_period) 6815 *dtim_period = valid ? tim->dtim_period : 0; 6816 6817 /* Check if value is overridden by non-transmitted profile */ 6818 if (!idx_ie || idx_ie[1] < 3) 6819 return valid; 6820 6821 idx = (void *)(idx_ie + 2); 6822 6823 if (dtim_count) 6824 *dtim_count = idx->dtim_count; 6825 6826 if (dtim_period) 6827 *dtim_period = idx->dtim_period; 6828 6829 return true; 6830 } 6831 6832 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6833 { 6834 if (bm_size == 1) 6835 return *data; 6836 6837 return get_unaligned_le16(data); 6838 } 6839 6840 static int 6841 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6842 const struct ieee80211_ttlm_elem *ttlm, 6843 struct ieee80211_adv_ttlm_info *ttlm_info) 6844 { 6845 /* The element size was already validated in 6846 * ieee80211_tid_to_link_map_size_ok() 6847 */ 6848 u8 control, link_map_presence, map_size, tid; 6849 u8 *pos; 6850 6851 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6852 pos = (void *)ttlm->optional; 6853 control = ttlm->control; 6854 6855 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6856 IEEE80211_TTLM_DIRECTION_BOTH) { 6857 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6858 return -EINVAL; 6859 } 6860 6861 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6862 link_map_presence = *pos; 6863 pos++; 6864 } 6865 6866 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6867 ttlm_info->switch_time = get_unaligned_le16(pos); 6868 6869 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6870 * it by 1. 6871 */ 6872 if (!ttlm_info->switch_time) 6873 ttlm_info->switch_time = 1; 6874 6875 pos += 2; 6876 } 6877 6878 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6879 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6880 pos += 3; 6881 } 6882 6883 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6884 ttlm_info->map = 0xffff; 6885 return 0; 6886 } 6887 6888 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6889 map_size = 1; 6890 else 6891 map_size = 2; 6892 6893 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6894 * not advertise a TID-to-link mapping that does not map all TIDs to the 6895 * same link set, reject frame if not all links have mapping 6896 */ 6897 if (link_map_presence != 0xff) { 6898 sdata_info(sdata, 6899 "Invalid advertised T2L mapping presence indicator\n"); 6900 return -EINVAL; 6901 } 6902 6903 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6904 if (!ttlm_info->map) { 6905 sdata_info(sdata, 6906 "Invalid advertised T2L map for TID 0\n"); 6907 return -EINVAL; 6908 } 6909 6910 pos += map_size; 6911 6912 for (tid = 1; tid < 8; tid++) { 6913 u16 map = ieee80211_get_ttlm(map_size, pos); 6914 6915 if (map != ttlm_info->map) { 6916 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6917 tid); 6918 return -EINVAL; 6919 } 6920 6921 pos += map_size; 6922 } 6923 return 0; 6924 } 6925 6926 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6927 struct ieee80211_mgmt *mgmt, 6928 struct ieee802_11_elems *elems, 6929 const u8 *elem_start, unsigned int elem_len) 6930 { 6931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6932 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6933 struct ieee80211_local *local = sdata->local; 6934 unsigned int link_id; 6935 struct sta_info *sta; 6936 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6937 u16 valid_links = 0, dormant_links = 0; 6938 int err; 6939 6940 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6941 /* 6942 * station info was already allocated and inserted before 6943 * the association and should be available to us 6944 */ 6945 sta = sta_info_get(sdata, assoc_data->ap_addr); 6946 if (WARN_ON(!sta)) 6947 goto out_err; 6948 6949 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6950 6951 if (ieee80211_vif_is_mld(&sdata->vif)) { 6952 if (!elems->ml_basic) 6953 goto out_err; 6954 6955 sta->sta.ext_mld_capa_ops = 6956 ieee80211_mle_get_ext_mld_capa_op((const void *)elems->ml_basic); 6957 6958 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6959 if (!assoc_data->link[link_id].bss) 6960 continue; 6961 6962 valid_links |= BIT(link_id); 6963 6964 if (link_id != assoc_data->assoc_link_id) { 6965 err = ieee80211_sta_allocate_link(sta, link_id); 6966 if (err) 6967 goto out_err; 6968 } 6969 } 6970 6971 /* 6972 * We do not support setting a negotiated TTLM during 6973 * association. As such, we can assume that if there is a TTLM, 6974 * then it is the currently active advertised TTLM. 6975 * In that case, there must be exactly one TTLM that does not 6976 * have a switch time set. This mapping should also leave us 6977 * with at least one usable link. 6978 */ 6979 if (elems->ttlm_num > 1) { 6980 sdata_info(sdata, 6981 "More than one advertised TTLM in association response\n"); 6982 goto out_err; 6983 } else if (elems->ttlm_num == 1) { 6984 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6985 &sdata->u.mgd.ttlm_info) || 6986 sdata->u.mgd.ttlm_info.switch_time != 0 || 6987 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6988 sdata_info(sdata, 6989 "Invalid advertised TTLM in association response\n"); 6990 goto out_err; 6991 } 6992 6993 sdata->u.mgd.ttlm_info.active = true; 6994 dormant_links = 6995 valid_links & ~sdata->u.mgd.ttlm_info.map; 6996 } 6997 6998 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6999 } 7000 7001 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7002 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 7003 struct ieee80211_link_data *link; 7004 struct link_sta_info *link_sta; 7005 7006 if (!cbss) 7007 continue; 7008 7009 link = sdata_dereference(sdata->link[link_id], sdata); 7010 if (WARN_ON(!link)) 7011 goto out_err; 7012 7013 if (ieee80211_vif_is_mld(&sdata->vif)) 7014 link_info(link, 7015 "local address %pM, AP link address %pM%s\n", 7016 link->conf->addr, 7017 assoc_data->link[link_id].bss->bssid, 7018 link_id == assoc_data->assoc_link_id ? 7019 " (assoc)" : ""); 7020 7021 link_sta = rcu_dereference_protected(sta->link[link_id], 7022 lockdep_is_held(&local->hw.wiphy->mtx)); 7023 if (WARN_ON(!link_sta)) 7024 goto out_err; 7025 7026 if (!link->u.mgd.have_beacon) { 7027 const struct cfg80211_bss_ies *ies; 7028 7029 rcu_read_lock(); 7030 ies = rcu_dereference(cbss->beacon_ies); 7031 if (ies) 7032 link->u.mgd.have_beacon = true; 7033 else 7034 ies = rcu_dereference(cbss->ies); 7035 ieee80211_get_dtim(ies, 7036 &link->conf->sync_dtim_count, 7037 &link->u.mgd.dtim_period); 7038 link->conf->beacon_int = cbss->beacon_interval; 7039 rcu_read_unlock(); 7040 } 7041 7042 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 7043 7044 if (link_id != assoc_data->assoc_link_id) { 7045 link->u.mgd.conn = assoc_data->link[link_id].conn; 7046 7047 err = ieee80211_prep_channel(sdata, link, link_sta, 7048 link_id, cbss, 7049 true, &link->u.mgd.conn, 7050 sdata->u.mgd.userspace_selectors); 7051 if (err) { 7052 link_info(link, "prep_channel failed\n"); 7053 goto out_err; 7054 } 7055 } 7056 7057 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 7058 assoc_data->link[link_id].bss); 7059 if (err) 7060 goto out_err; 7061 7062 if (!ieee80211_assoc_config_link(link, link_sta, 7063 assoc_data->link[link_id].bss, 7064 mgmt, elem_start, elem_len, 7065 &changed[link_id])) 7066 goto out_err; 7067 7068 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 7069 valid_links &= ~BIT(link_id); 7070 ieee80211_sta_remove_link(sta, link_id); 7071 continue; 7072 } 7073 7074 if (link_id != assoc_data->assoc_link_id) { 7075 err = ieee80211_sta_activate_link(sta, link_id); 7076 if (err) 7077 goto out_err; 7078 } 7079 } 7080 7081 /* links might have changed due to rejected ones, set them again */ 7082 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 7083 7084 rate_control_rate_init_all_links(sta); 7085 7086 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 7087 set_sta_flag(sta, WLAN_STA_MFP); 7088 sta->sta.mfp = true; 7089 } else { 7090 sta->sta.mfp = false; 7091 } 7092 7093 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 7094 elems->ext_capab_len); 7095 7096 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 7097 local->hw.queues >= IEEE80211_NUM_ACS; 7098 7099 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 7100 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 7101 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 7102 if (err) { 7103 sdata_info(sdata, 7104 "failed to move station %pM to desired state\n", 7105 sta->sta.addr); 7106 WARN_ON(__sta_info_destroy(sta)); 7107 goto out_err; 7108 } 7109 7110 if (sdata->wdev.use_4addr) 7111 drv_sta_set_4addr(local, sdata, &sta->sta, true); 7112 7113 ieee80211_set_associated(sdata, assoc_data, changed); 7114 7115 /* 7116 * If we're using 4-addr mode, let the AP know that we're 7117 * doing so, so that it can create the STA VLAN on its side 7118 */ 7119 if (ifmgd->use_4addr) 7120 ieee80211_send_4addr_nullfunc(local, sdata); 7121 7122 /* 7123 * Start timer to probe the connection to the AP now. 7124 * Also start the timer that will detect beacon loss. 7125 */ 7126 ieee80211_sta_reset_beacon_monitor(sdata); 7127 ieee80211_sta_reset_conn_monitor(sdata); 7128 7129 ieee80211_send_uhr_omp_req_dbe(sdata, ~0, true); 7130 7131 return true; 7132 out_err: 7133 eth_zero_addr(sdata->vif.cfg.ap_addr); 7134 return false; 7135 } 7136 7137 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 7138 struct ieee80211_mgmt *mgmt, 7139 size_t len) 7140 { 7141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7142 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 7143 u16 capab_info, status_code, aid = 0; 7144 struct ieee80211_elems_parse_params parse_params = { 7145 .bss = NULL, 7146 .link_id = -1, 7147 .from_ap = true, 7148 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7149 }; 7150 struct ieee802_11_elems *elems; 7151 struct sta_info *sta; 7152 int ac; 7153 const u8 *elem_start; 7154 unsigned int elem_len; 7155 bool reassoc; 7156 struct ieee80211_event event = { 7157 .type = MLME_EVENT, 7158 .u.mlme.data = ASSOC_EVENT, 7159 }; 7160 struct ieee80211_prep_tx_info info = {}; 7161 struct cfg80211_rx_assoc_resp_data resp = { 7162 .uapsd_queues = -1, 7163 }; 7164 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 7165 unsigned int link_id; 7166 u16 max_aid = IEEE80211_MAX_AID; 7167 7168 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7169 7170 if (!assoc_data) 7171 return; 7172 7173 info.link_id = assoc_data->assoc_link_id; 7174 7175 parse_params.mode = 7176 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 7177 7178 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 7179 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 7180 return; 7181 7182 /* 7183 * AssocResp and ReassocResp have identical structure, so process both 7184 * of them in this function. 7185 */ 7186 7187 if (len < 24 + 6) 7188 return; 7189 7190 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 7191 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 7192 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 7193 if (assoc_data->s1g) { 7194 elem_start = mgmt->u.s1g_assoc_resp.variable; 7195 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 7196 } else { 7197 elem_start = mgmt->u.assoc_resp.variable; 7198 } 7199 7200 /* 7201 * Note: this may not be perfect, AP might misbehave - if 7202 * anyone needs to rely on perfect complete notification 7203 * with the exact right subtype, then we need to track what 7204 * we actually transmitted. 7205 */ 7206 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 7207 IEEE80211_STYPE_ASSOC_REQ; 7208 7209 if (assoc_data->fils_kek_len && 7210 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 7211 return; 7212 7213 elem_len = len - (elem_start - (u8 *)mgmt); 7214 parse_params.start = elem_start; 7215 parse_params.len = elem_len; 7216 elems = ieee802_11_parse_elems_full(&parse_params); 7217 if (!elems) 7218 goto notify_driver; 7219 7220 if (elems->aid_resp) 7221 aid = le16_to_cpu(elems->aid_resp->aid); 7222 else if (!assoc_data->s1g) 7223 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 7224 else if (status_code == WLAN_STATUS_SUCCESS) 7225 goto abandon_assoc; 7226 7227 /* 7228 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 7229 * an S1G STA the 3 MSBs are reserved. 7230 * (802.11-2016 9.4.1.8 AID field). 7231 */ 7232 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 7233 7234 sdata_info(sdata, 7235 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 7236 reassoc ? "Rea" : "A", assoc_data->ap_addr, 7237 capab_info, status_code, aid); 7238 7239 ifmgd->broken_ap = false; 7240 7241 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 7242 elems->timeout_int && 7243 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 7244 u32 tu, ms; 7245 7246 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 7247 le32_to_cpu(elems->timeout_int->value)); 7248 7249 tu = le32_to_cpu(elems->timeout_int->value); 7250 ms = tu * 1024 / 1000; 7251 sdata_info(sdata, 7252 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 7253 assoc_data->ap_addr, tu, ms); 7254 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 7255 assoc_data->timeout_started = true; 7256 assoc_data->comeback = true; 7257 if (ms > IEEE80211_ASSOC_TIMEOUT) 7258 run_again(sdata, assoc_data->timeout); 7259 goto notify_driver; 7260 } 7261 7262 if (status_code != WLAN_STATUS_SUCCESS) { 7263 sdata_info(sdata, "%pM denied association (code=%d)\n", 7264 assoc_data->ap_addr, status_code); 7265 event.u.mlme.status = MLME_DENIED; 7266 event.u.mlme.reason = status_code; 7267 drv_event_callback(sdata->local, sdata, &event); 7268 } else { 7269 if (aid == 0 || aid > max_aid) { 7270 sdata_info(sdata, 7271 "invalid AID value %d (out of range), turn off PS\n", 7272 aid); 7273 aid = 0; 7274 ifmgd->broken_ap = true; 7275 } 7276 7277 if (ieee80211_vif_is_mld(&sdata->vif)) { 7278 struct ieee80211_mle_basic_common_info *common; 7279 7280 if (!elems->ml_basic) { 7281 sdata_info(sdata, 7282 "MLO association with %pM but no (basic) multi-link element in response!\n", 7283 assoc_data->ap_addr); 7284 goto abandon_assoc; 7285 } 7286 7287 common = (void *)elems->ml_basic->variable; 7288 7289 if (memcmp(assoc_data->ap_addr, 7290 common->mld_mac_addr, ETH_ALEN)) { 7291 sdata_info(sdata, 7292 "AP MLD MAC address mismatch: got %pM expected %pM\n", 7293 common->mld_mac_addr, 7294 assoc_data->ap_addr); 7295 goto abandon_assoc; 7296 } 7297 7298 sdata->vif.cfg.eml_cap = 7299 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 7300 sdata->vif.cfg.eml_med_sync_delay = 7301 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 7302 sdata->vif.cfg.mld_capa_op = 7303 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 7304 } 7305 7306 sdata->vif.cfg.aid = aid; 7307 sdata->vif.cfg.s1g = assoc_data->s1g; 7308 7309 if (!ieee80211_assoc_success(sdata, mgmt, elems, 7310 elem_start, elem_len)) { 7311 /* oops -- internal error -- send timeout for now */ 7312 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7313 goto notify_driver; 7314 } 7315 event.u.mlme.status = MLME_SUCCESS; 7316 drv_event_callback(sdata->local, sdata, &event); 7317 sdata_info(sdata, "associated\n"); 7318 7319 info.success = 1; 7320 } 7321 7322 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7323 struct ieee80211_link_data *link; 7324 7325 if (!assoc_data->link[link_id].bss) 7326 continue; 7327 7328 resp.links[link_id].bss = assoc_data->link[link_id].bss; 7329 ether_addr_copy(resp.links[link_id].addr, 7330 assoc_data->link[link_id].addr); 7331 resp.links[link_id].status = assoc_data->link[link_id].status; 7332 7333 link = sdata_dereference(sdata->link[link_id], sdata); 7334 if (!link) 7335 continue; 7336 7337 /* get uapsd queues configuration - same for all links */ 7338 resp.uapsd_queues = 0; 7339 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 7340 if (link->tx_conf[ac].uapsd) 7341 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 7342 } 7343 7344 if (ieee80211_vif_is_mld(&sdata->vif)) { 7345 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 7346 resp.ap_mld_addr = ap_mld_addr; 7347 } 7348 7349 /* 7350 * If epp_peer set, unprotected (Re)Association Request/Response frames 7351 * are dropped, which ensures that the (re)association exchange is 7352 * encrypted over the air. 7353 */ 7354 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 7355 resp.assoc_encrypted = sta && sta->sta.epp_peer; 7356 7357 ieee80211_destroy_assoc_data(sdata, 7358 status_code == WLAN_STATUS_SUCCESS ? 7359 ASSOC_SUCCESS : 7360 ASSOC_REJECTED); 7361 7362 resp.buf = (u8 *)mgmt; 7363 resp.len = len; 7364 resp.req_ies = ifmgd->assoc_req_ies; 7365 resp.req_ies_len = ifmgd->assoc_req_ies_len; 7366 cfg80211_rx_assoc_resp(sdata->dev, &resp); 7367 notify_driver: 7368 drv_mgd_complete_tx(sdata->local, sdata, &info); 7369 kfree(elems); 7370 return; 7371 abandon_assoc: 7372 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7373 goto notify_driver; 7374 } 7375 7376 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 7377 struct ieee80211_mgmt *mgmt, size_t len, 7378 struct ieee80211_rx_status *rx_status) 7379 { 7380 struct ieee80211_sub_if_data *sdata = link->sdata; 7381 struct ieee80211_local *local = sdata->local; 7382 struct ieee80211_bss *bss; 7383 struct ieee80211_channel *channel; 7384 7385 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7386 7387 channel = ieee80211_get_channel_khz(local->hw.wiphy, 7388 ieee80211_rx_status_to_khz(rx_status)); 7389 if (!channel) 7390 return; 7391 7392 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 7393 if (bss) { 7394 link->conf->beacon_rate = bss->beacon_rate; 7395 ieee80211_rx_bss_put(local, bss); 7396 } 7397 } 7398 7399 7400 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 7401 struct sk_buff *skb) 7402 { 7403 struct ieee80211_sub_if_data *sdata = link->sdata; 7404 struct ieee80211_mgmt *mgmt = (void *)skb->data; 7405 struct ieee80211_if_managed *ifmgd; 7406 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 7407 struct ieee80211_channel *channel; 7408 size_t baselen, len = skb->len; 7409 7410 ifmgd = &sdata->u.mgd; 7411 7412 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7413 7414 /* 7415 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 7416 * "If a 6 GHz AP receives a Probe Request frame and responds with 7417 * a Probe Response frame [..], the Address 1 field of the Probe 7418 * Response frame shall be set to the broadcast address [..]" 7419 * So, on 6GHz band we should also accept broadcast responses. 7420 */ 7421 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 7422 ieee80211_rx_status_to_khz(rx_status)); 7423 if (!channel) 7424 return; 7425 7426 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 7427 (channel->band != NL80211_BAND_6GHZ || 7428 !is_broadcast_ether_addr(mgmt->da))) 7429 return; /* ignore ProbeResp to foreign address */ 7430 7431 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 7432 if (baselen > len) 7433 return; 7434 7435 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7436 7437 if (ifmgd->associated && 7438 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 7439 ieee80211_reset_ap_probe(sdata); 7440 } 7441 7442 /* 7443 * This is the canonical list of information elements we care about, 7444 * the filter code also gives us all changes to the Microsoft OUI 7445 * (00:50:F2) vendor IE which is used for WMM which we need to track, 7446 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 7447 * changes to requested client power. 7448 * 7449 * We implement beacon filtering in software since that means we can 7450 * avoid processing the frame here and in cfg80211, and userspace 7451 * will not be able to tell whether the hardware supports it or not. 7452 * 7453 * XXX: This list needs to be dynamic -- userspace needs to be able to 7454 * add items it requires. It also needs to be able to tell us to 7455 * look out for other vendor IEs. 7456 */ 7457 static const u64 care_about_ies = 7458 (1ULL << WLAN_EID_COUNTRY) | 7459 (1ULL << WLAN_EID_ERP_INFO) | 7460 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 7461 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 7462 (1ULL << WLAN_EID_HT_CAPABILITY) | 7463 (1ULL << WLAN_EID_HT_OPERATION) | 7464 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 7465 7466 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 7467 struct ieee80211_if_managed *ifmgd, 7468 struct ieee80211_bss_conf *bss_conf, 7469 struct ieee80211_local *local, 7470 struct ieee80211_rx_status *rx_status) 7471 { 7472 struct ieee80211_sub_if_data *sdata = link->sdata; 7473 7474 /* Track average RSSI from the Beacon frames of the current AP */ 7475 7476 if (!link->u.mgd.tracking_signal_avg) { 7477 link->u.mgd.tracking_signal_avg = true; 7478 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 7479 link->u.mgd.last_cqm_event_signal = 0; 7480 link->u.mgd.count_beacon_signal = 1; 7481 link->u.mgd.last_ave_beacon_signal = 0; 7482 } else { 7483 link->u.mgd.count_beacon_signal++; 7484 } 7485 7486 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 7487 -rx_status->signal); 7488 7489 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 7490 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7491 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7492 int last_sig = link->u.mgd.last_ave_beacon_signal; 7493 struct ieee80211_event event = { 7494 .type = RSSI_EVENT, 7495 }; 7496 7497 /* 7498 * if signal crosses either of the boundaries, invoke callback 7499 * with appropriate parameters 7500 */ 7501 if (sig > ifmgd->rssi_max_thold && 7502 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 7503 link->u.mgd.last_ave_beacon_signal = sig; 7504 event.u.rssi.data = RSSI_EVENT_HIGH; 7505 drv_event_callback(local, sdata, &event); 7506 } else if (sig < ifmgd->rssi_min_thold && 7507 (last_sig >= ifmgd->rssi_max_thold || 7508 last_sig == 0)) { 7509 link->u.mgd.last_ave_beacon_signal = sig; 7510 event.u.rssi.data = RSSI_EVENT_LOW; 7511 drv_event_callback(local, sdata, &event); 7512 } 7513 } 7514 7515 if (bss_conf->cqm_rssi_thold && 7516 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 7517 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 7518 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7519 int last_event = link->u.mgd.last_cqm_event_signal; 7520 int thold = bss_conf->cqm_rssi_thold; 7521 int hyst = bss_conf->cqm_rssi_hyst; 7522 7523 if (sig < thold && 7524 (last_event == 0 || sig < last_event - hyst)) { 7525 link->u.mgd.last_cqm_event_signal = sig; 7526 ieee80211_cqm_rssi_notify( 7527 &sdata->vif, 7528 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7529 sig, GFP_KERNEL); 7530 } else if (sig > thold && 7531 (last_event == 0 || sig > last_event + hyst)) { 7532 link->u.mgd.last_cqm_event_signal = sig; 7533 ieee80211_cqm_rssi_notify( 7534 &sdata->vif, 7535 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7536 sig, GFP_KERNEL); 7537 } 7538 } 7539 7540 if (bss_conf->cqm_rssi_low && 7541 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7542 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7543 int last_event = link->u.mgd.last_cqm_event_signal; 7544 int low = bss_conf->cqm_rssi_low; 7545 int high = bss_conf->cqm_rssi_high; 7546 7547 if (sig < low && 7548 (last_event == 0 || last_event >= low)) { 7549 link->u.mgd.last_cqm_event_signal = sig; 7550 ieee80211_cqm_rssi_notify( 7551 &sdata->vif, 7552 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7553 sig, GFP_KERNEL); 7554 } else if (sig > high && 7555 (last_event == 0 || last_event <= high)) { 7556 link->u.mgd.last_cqm_event_signal = sig; 7557 ieee80211_cqm_rssi_notify( 7558 &sdata->vif, 7559 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7560 sig, GFP_KERNEL); 7561 } 7562 } 7563 } 7564 7565 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 7566 struct cfg80211_bss *bss) 7567 { 7568 if (ether_addr_equal(tx_bssid, bss->bssid)) 7569 return true; 7570 if (!bss->transmitted_bss) 7571 return false; 7572 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 7573 } 7574 7575 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 7576 struct wiphy_work *work) 7577 { 7578 struct ieee80211_sub_if_data *sdata = 7579 container_of(work, struct ieee80211_sub_if_data, 7580 u.mgd.ml_reconf_work.work); 7581 u16 new_valid_links, new_active_links, new_dormant_links; 7582 int ret; 7583 7584 if (!sdata->u.mgd.removed_links) 7585 return; 7586 7587 sdata_info(sdata, 7588 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 7589 sdata->vif.valid_links, sdata->u.mgd.removed_links); 7590 7591 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 7592 if (new_valid_links == sdata->vif.valid_links) 7593 return; 7594 7595 if (!new_valid_links || 7596 !(new_valid_links & ~sdata->vif.dormant_links)) { 7597 sdata_info(sdata, "No valid links after reconfiguration\n"); 7598 ret = -EINVAL; 7599 goto out; 7600 } 7601 7602 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 7603 if (new_active_links != sdata->vif.active_links) { 7604 if (!new_active_links) 7605 new_active_links = 7606 BIT(ffs(new_valid_links & 7607 ~sdata->vif.dormant_links) - 1); 7608 7609 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 7610 if (ret) { 7611 sdata_info(sdata, 7612 "Failed setting active links\n"); 7613 goto out; 7614 } 7615 } 7616 7617 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 7618 7619 ret = ieee80211_vif_set_links(sdata, new_valid_links, 7620 new_dormant_links); 7621 if (ret) 7622 sdata_info(sdata, "Failed setting valid links\n"); 7623 7624 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 7625 7626 out: 7627 if (!ret) 7628 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 7629 else 7630 __ieee80211_disconnect(sdata); 7631 7632 sdata->u.mgd.removed_links = 0; 7633 } 7634 7635 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 7636 struct ieee802_11_elems *elems) 7637 { 7638 const struct element *sub; 7639 unsigned long removed_links = 0; 7640 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7641 u8 link_id; 7642 u32 delay; 7643 7644 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 7645 return; 7646 7647 /* Directly parse the sub elements as the common information doesn't 7648 * hold any useful information. 7649 */ 7650 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 7651 elems->ml_reconf_len) { 7652 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7653 u8 *pos = prof->variable; 7654 u16 control; 7655 7656 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 7657 continue; 7658 7659 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 7660 sub->datalen)) 7661 return; 7662 7663 control = le16_to_cpu(prof->control); 7664 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 7665 7666 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7667 continue; 7668 7669 removed_links |= BIT(link_id); 7670 7671 /* the MAC address should not be included, but handle it */ 7672 if (control & 7673 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 7674 pos += 6; 7675 7676 /* According to Draft P802.11be_D3.0, the control should 7677 * include the AP Removal Timer present. If the AP Removal Timer 7678 * is not present assume immediate removal. 7679 */ 7680 if (control & 7681 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 7682 link_removal_timeout[link_id] = get_unaligned_le16(pos); 7683 } 7684 7685 removed_links &= sdata->vif.valid_links; 7686 if (!removed_links) { 7687 /* In case the removal was cancelled, abort it */ 7688 if (sdata->u.mgd.removed_links) { 7689 sdata->u.mgd.removed_links = 0; 7690 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7691 &sdata->u.mgd.ml_reconf_work); 7692 } 7693 return; 7694 } 7695 7696 delay = 0; 7697 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7698 struct ieee80211_bss_conf *link_conf = 7699 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7700 u32 link_delay; 7701 7702 if (!link_conf) { 7703 removed_links &= ~BIT(link_id); 7704 continue; 7705 } 7706 7707 if (link_removal_timeout[link_id] < 1) 7708 link_delay = 0; 7709 else 7710 link_delay = link_conf->beacon_int * 7711 (link_removal_timeout[link_id] - 1); 7712 7713 if (!delay) 7714 delay = link_delay; 7715 else 7716 delay = min(delay, link_delay); 7717 } 7718 7719 sdata->u.mgd.removed_links = removed_links; 7720 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7721 &sdata->u.mgd.ml_reconf_work, 7722 us_to_ktime(ieee80211_tu_to_usec(delay))); 7723 } 7724 7725 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7726 u16 active_links, u16 dormant_links, 7727 u16 suspended_links) 7728 { 7729 u64 changed = 0; 7730 int ret; 7731 7732 if (!active_links) { 7733 ret = -EINVAL; 7734 goto out; 7735 } 7736 7737 /* If there is an active negotiated TTLM, it should be discarded by 7738 * the new negotiated/advertised TTLM. 7739 */ 7740 if (sdata->vif.neg_ttlm.valid) { 7741 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7742 sdata->vif.suspended_links = 0; 7743 changed = BSS_CHANGED_MLD_TTLM; 7744 } 7745 7746 if (sdata->vif.active_links != active_links) { 7747 /* usable links are affected when active_links are changed, 7748 * so notify the driver about the status change 7749 */ 7750 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7751 active_links &= sdata->vif.active_links; 7752 if (!active_links) 7753 active_links = 7754 BIT(__ffs(sdata->vif.valid_links & 7755 ~dormant_links)); 7756 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7757 if (ret) { 7758 sdata_info(sdata, "Failed to set TTLM active links\n"); 7759 goto out; 7760 } 7761 } 7762 7763 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7764 dormant_links); 7765 if (ret) { 7766 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7767 goto out; 7768 } 7769 7770 sdata->vif.suspended_links = suspended_links; 7771 if (sdata->vif.suspended_links) 7772 changed |= BSS_CHANGED_MLD_TTLM; 7773 7774 ieee80211_vif_cfg_change_notify(sdata, changed); 7775 7776 out: 7777 if (ret) 7778 ieee80211_disconnect(&sdata->vif, false); 7779 7780 return ret; 7781 } 7782 7783 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7784 struct wiphy_work *work) 7785 { 7786 u16 new_active_links, new_dormant_links; 7787 struct ieee80211_sub_if_data *sdata = 7788 container_of(work, struct ieee80211_sub_if_data, 7789 u.mgd.ttlm_work.work); 7790 7791 new_active_links = sdata->u.mgd.ttlm_info.map & 7792 sdata->vif.valid_links; 7793 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7794 sdata->vif.valid_links; 7795 7796 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7797 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7798 0)) 7799 return; 7800 7801 sdata->u.mgd.ttlm_info.active = true; 7802 sdata->u.mgd.ttlm_info.switch_time = 0; 7803 } 7804 7805 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7806 struct ieee802_11_elems *elems, 7807 u64 beacon_ts) 7808 { 7809 u8 i; 7810 int ret; 7811 7812 if (!ieee80211_vif_is_mld(&sdata->vif)) 7813 return; 7814 7815 if (!elems->ttlm_num) { 7816 if (sdata->u.mgd.ttlm_info.switch_time) { 7817 /* if a planned TID-to-link mapping was cancelled - 7818 * abort it 7819 */ 7820 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7821 &sdata->u.mgd.ttlm_work); 7822 } else if (sdata->u.mgd.ttlm_info.active) { 7823 /* if no TID-to-link element, set to default mapping in 7824 * which all TIDs are mapped to all setup links 7825 */ 7826 ret = ieee80211_vif_set_links(sdata, 7827 sdata->vif.valid_links, 7828 0); 7829 if (ret) { 7830 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7831 return; 7832 } 7833 ieee80211_vif_cfg_change_notify(sdata, 7834 BSS_CHANGED_MLD_VALID_LINKS); 7835 } 7836 memset(&sdata->u.mgd.ttlm_info, 0, 7837 sizeof(sdata->u.mgd.ttlm_info)); 7838 return; 7839 } 7840 7841 for (i = 0; i < elems->ttlm_num; i++) { 7842 struct ieee80211_adv_ttlm_info ttlm_info; 7843 u32 res; 7844 7845 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7846 &ttlm_info); 7847 7848 if (res) { 7849 __ieee80211_disconnect(sdata); 7850 return; 7851 } 7852 7853 if (ttlm_info.switch_time) { 7854 u16 beacon_ts_tu, st_tu, delay; 7855 u64 delay_usec; 7856 u64 mask; 7857 7858 /* The t2l map switch time is indicated with a partial 7859 * TSF value (bits 10 to 25), get the partial beacon TS 7860 * as well, and calc the delay to the start time. 7861 */ 7862 mask = GENMASK_ULL(25, 10); 7863 beacon_ts_tu = (beacon_ts & mask) >> 10; 7864 st_tu = ttlm_info.switch_time; 7865 delay = st_tu - beacon_ts_tu; 7866 7867 /* 7868 * If the switch time is far in the future, then it 7869 * could also be the previous switch still being 7870 * announced. 7871 * We can simply ignore it for now, if it is a future 7872 * switch the AP will continue to announce it anyway. 7873 */ 7874 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7875 return; 7876 7877 delay_usec = ieee80211_tu_to_usec(delay); 7878 7879 /* Link switching can take time, so schedule it 7880 * 100ms before to be ready on time 7881 */ 7882 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7883 delay_usec -= 7884 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7885 else 7886 delay_usec = 0; 7887 7888 sdata->u.mgd.ttlm_info = ttlm_info; 7889 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7890 &sdata->u.mgd.ttlm_work); 7891 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7892 &sdata->u.mgd.ttlm_work, 7893 us_to_ktime(delay_usec)); 7894 return; 7895 } 7896 } 7897 } 7898 7899 static void 7900 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7901 int reporting_link_id, 7902 struct ieee802_11_elems *elems) 7903 { 7904 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7905 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7906 const struct element *sub; 7907 const u8 *subelems; 7908 size_t subelems_len; 7909 u8 common_size; 7910 int link_id; 7911 7912 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7913 return; 7914 7915 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7916 subelems = (u8 *)elems->ml_basic + common_size; 7917 subelems_len = elems->ml_basic_len - common_size; 7918 7919 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7920 subelems, subelems_len) { 7921 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7922 struct ieee80211_link_data *link; 7923 ssize_t len; 7924 7925 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7926 sub->datalen)) 7927 continue; 7928 7929 link_id = le16_get_bits(prof->control, 7930 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7931 /* need a valid link ID, but also not our own, both AP bugs */ 7932 if (link_id == reporting_link_id || 7933 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7934 continue; 7935 7936 link = sdata_dereference(sdata->link[link_id], sdata); 7937 if (!link) 7938 continue; 7939 7940 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7941 NULL, 0, 7942 IEEE80211_MLE_SUBELEM_FRAGMENT); 7943 if (WARN_ON(len < 0)) 7944 continue; 7945 7946 sta_profiles[link_id] = sub; 7947 sta_profiles_len[link_id] = len; 7948 } 7949 7950 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7951 struct ieee80211_mle_per_sta_profile *prof; 7952 struct ieee802_11_elems *prof_elems; 7953 struct ieee80211_link_data *link; 7954 ssize_t len; 7955 7956 if (link_id == reporting_link_id) 7957 continue; 7958 7959 link = sdata_dereference(sdata->link[link_id], sdata); 7960 if (!link) 7961 continue; 7962 7963 if (!sta_profiles[link_id]) { 7964 prof_elems = NULL; 7965 goto handle; 7966 } 7967 7968 /* we can defragment in-place, won't use the buffer again */ 7969 len = cfg80211_defragment_element(sta_profiles[link_id], 7970 subelems, subelems_len, 7971 (void *)sta_profiles[link_id], 7972 sta_profiles_len[link_id], 7973 IEEE80211_MLE_SUBELEM_FRAGMENT); 7974 if (WARN_ON(len != sta_profiles_len[link_id])) 7975 continue; 7976 7977 prof = (void *)sta_profiles[link_id]; 7978 prof_elems = ieee802_11_parse_elems(prof->variable + 7979 (prof->sta_info_len - 1), 7980 len - 7981 (prof->sta_info_len - 1), 7982 IEEE80211_FTYPE_MGMT | 7983 IEEE80211_STYPE_BEACON, 7984 NULL); 7985 7986 /* memory allocation failed - let's hope that's transient */ 7987 if (!prof_elems) 7988 continue; 7989 7990 handle: 7991 /* 7992 * FIXME: the timings here are obviously incorrect, 7993 * but only older Intel drivers seem to care, and 7994 * those don't have MLO. If you really need this, 7995 * the problem is having to calculate it with the 7996 * TSF offset etc. The device_timestamp is still 7997 * correct, of course. 7998 */ 7999 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 8000 IEEE80211_CSA_SOURCE_OTHER_LINK); 8001 kfree(prof_elems); 8002 } 8003 } 8004 8005 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 8006 const struct ieee802_11_elems *elems) 8007 { 8008 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 8009 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 8010 8011 if (!elems->ssid) 8012 return false; 8013 8014 /* hidden SSID: zero length */ 8015 if (elems->ssid_len == 0) 8016 return false; 8017 8018 if (elems->ssid_len != cfg->ssid_len) 8019 return true; 8020 8021 /* hidden SSID: zeroed out */ 8022 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 8023 return false; 8024 8025 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 8026 } 8027 8028 static bool 8029 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 8030 struct ieee80211_mgmt *mgmt, 8031 struct ieee80211_rx_status *rx_status, 8032 struct ieee80211_chanctx_conf *chanctx) 8033 { 8034 u32 pri_2mhz_khz; 8035 struct ieee80211_channel *s1g_sibling_1mhz; 8036 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 8037 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 8038 8039 if (rx_khz == pri_khz) 8040 return true; 8041 8042 if (!chanctx->def.s1g_primary_2mhz) 8043 return false; 8044 8045 /* 8046 * If we have an S1G interface with a 2MHz primary, beacons are 8047 * sent on the center frequency of the 2MHz primary. Find the sibling 8048 * 1MHz channel and calculate the 2MHz primary center frequency. 8049 */ 8050 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 8051 &chanctx->def); 8052 if (!s1g_sibling_1mhz) 8053 return false; 8054 8055 pri_2mhz_khz = 8056 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 8057 return rx_khz == pri_2mhz_khz; 8058 } 8059 8060 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 8061 struct ieee80211_hdr *hdr, size_t len, 8062 struct ieee80211_rx_status *rx_status) 8063 { 8064 struct ieee80211_sub_if_data *sdata = link->sdata; 8065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8066 struct ieee80211_bss_conf *bss_conf = link->conf; 8067 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8068 struct ieee80211_mgmt *mgmt = (void *) hdr; 8069 struct ieee80211_ext *ext = NULL; 8070 size_t baselen; 8071 struct ieee802_11_elems *elems; 8072 struct ieee80211_local *local = sdata->local; 8073 struct ieee80211_chanctx_conf *chanctx_conf; 8074 struct ieee80211_supported_band *sband; 8075 struct ieee80211_channel *chan; 8076 struct link_sta_info *link_sta; 8077 struct sta_info *sta; 8078 u64 changed = 0; 8079 u32 ncrc = 0; 8080 u8 *bssid, *variable = mgmt->u.beacon.variable; 8081 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8082 struct ieee80211_elems_parse_params parse_params = { 8083 .mode = link->u.mgd.conn.mode, 8084 .link_id = -1, 8085 .from_ap = true, 8086 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 8087 }; 8088 8089 lockdep_assert_wiphy(local->hw.wiphy); 8090 8091 /* Process beacon from the current BSS */ 8092 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 8093 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 8094 ext = (void *)mgmt; 8095 variable = ext->u.s1g_beacon.variable + 8096 ieee80211_s1g_optional_len(ext->frame_control); 8097 } 8098 8099 baselen = (u8 *) variable - (u8 *) mgmt; 8100 if (baselen > len) 8101 return; 8102 8103 parse_params.start = variable; 8104 parse_params.len = len - baselen; 8105 8106 rcu_read_lock(); 8107 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 8108 if (!chanctx_conf) { 8109 rcu_read_unlock(); 8110 return; 8111 } 8112 8113 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 8114 chanctx_conf)) { 8115 rcu_read_unlock(); 8116 return; 8117 } 8118 chan = chanctx_conf->def.chan; 8119 rcu_read_unlock(); 8120 8121 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 8122 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 8123 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 8124 parse_params.bss = ifmgd->assoc_data->link[0].bss; 8125 elems = ieee802_11_parse_elems_full(&parse_params); 8126 if (!elems) 8127 return; 8128 8129 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 8130 8131 if (elems->dtim_period) 8132 link->u.mgd.dtim_period = elems->dtim_period; 8133 link->u.mgd.have_beacon = true; 8134 ifmgd->assoc_data->need_beacon = false; 8135 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 8136 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 8137 bss_conf->sync_tsf = 8138 le64_to_cpu(mgmt->u.beacon.timestamp); 8139 bss_conf->sync_device_ts = 8140 rx_status->device_timestamp; 8141 bss_conf->sync_dtim_count = elems->dtim_count; 8142 } 8143 8144 if (elems->mbssid_config_ie) 8145 bss_conf->profile_periodicity = 8146 elems->mbssid_config_ie->profile_periodicity; 8147 else 8148 bss_conf->profile_periodicity = 0; 8149 8150 if (elems->ext_capab_len >= 11 && 8151 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8152 bss_conf->ema_ap = true; 8153 else 8154 bss_conf->ema_ap = false; 8155 8156 /* continue assoc process */ 8157 ifmgd->assoc_data->timeout = jiffies; 8158 ifmgd->assoc_data->timeout_started = true; 8159 run_again(sdata, ifmgd->assoc_data->timeout); 8160 kfree(elems); 8161 return; 8162 } 8163 8164 if (!ifmgd->associated || 8165 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 8166 return; 8167 bssid = link->u.mgd.bssid; 8168 8169 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 8170 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 8171 local, rx_status); 8172 8173 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 8174 mlme_dbg_ratelimited(sdata, 8175 "cancelling AP probe due to a received beacon\n"); 8176 ieee80211_reset_ap_probe(sdata); 8177 } 8178 8179 /* 8180 * Push the beacon loss detection into the future since 8181 * we are processing a beacon from the AP just now. 8182 */ 8183 ieee80211_sta_reset_beacon_monitor(sdata); 8184 8185 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 8186 * element (which carries the beacon interval). Don't forget to add a 8187 * bit to care_about_ies[] above if mac80211 is interested in a 8188 * changing S1G element. 8189 */ 8190 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 8191 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 8192 parse_params.bss = bss_conf->bss; 8193 parse_params.filter = care_about_ies; 8194 parse_params.crc = ncrc; 8195 elems = ieee802_11_parse_elems_full(&parse_params); 8196 if (!elems) 8197 return; 8198 8199 /* 8200 * Note: with MBSSID and an EMA (or broken) AP, we could fail to find 8201 * the correct multi-BSSID profile for the non-transmitting AP we're 8202 * connected to. The result's elems->mbssid_nontx_profile_missing is 8203 * indicating that, but some things must happen regardless. 8204 */ 8205 8206 if (rx_status->flag & RX_FLAG_DECRYPTED && 8207 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 8208 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 8209 sdata->vif.cfg.ap_addr); 8210 __ieee80211_disconnect(sdata); 8211 return; 8212 } 8213 8214 ncrc = elems->crc; 8215 8216 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 8217 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 8218 vif_cfg->s1g)) { 8219 if (local->hw.conf.dynamic_ps_timeout > 0) { 8220 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 8221 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 8222 ieee80211_hw_config(local, -1, 8223 IEEE80211_CONF_CHANGE_PS); 8224 } 8225 ieee80211_send_nullfunc(local, sdata, false); 8226 } else if (!local->pspolling && sdata->u.mgd.powersave) { 8227 local->pspolling = true; 8228 8229 /* 8230 * Here is assumed that the driver will be 8231 * able to send ps-poll frame and receive a 8232 * response even though power save mode is 8233 * enabled, but some drivers might require 8234 * to disable power save here. This needs 8235 * to be investigated. 8236 */ 8237 ieee80211_send_pspoll(local, sdata); 8238 } 8239 } 8240 8241 /* 8242 * P2P will almost certainly not have MBSSID, but this just 8243 * assumes that it would at least always inherit NoA anyway 8244 * since it's absent from the channel. 8245 */ 8246 if (sdata->vif.p2p || 8247 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 8248 struct ieee80211_p2p_noa_attr noa = {}; 8249 int ret; 8250 8251 ret = cfg80211_get_p2p_attr(variable, 8252 len - baselen, 8253 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 8254 (u8 *) &noa, sizeof(noa)); 8255 if (ret >= 2) { 8256 if (link->u.mgd.p2p_noa_index != noa.index) { 8257 /* valid noa_attr and index changed */ 8258 link->u.mgd.p2p_noa_index = noa.index; 8259 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 8260 changed |= BSS_CHANGED_P2P_PS; 8261 /* 8262 * make sure we update all information, the CRC 8263 * mechanism doesn't look at P2P attributes. 8264 */ 8265 link->u.mgd.beacon_crc_valid = false; 8266 } 8267 } else if (link->u.mgd.p2p_noa_index != -1) { 8268 /* noa_attr not found and we had valid noa_attr before */ 8269 link->u.mgd.p2p_noa_index = -1; 8270 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 8271 changed |= BSS_CHANGED_P2P_PS; 8272 link->u.mgd.beacon_crc_valid = false; 8273 } 8274 } 8275 8276 /* 8277 * Update beacon timing and dtim count on every beacon appearance. This 8278 * will allow the driver to use the most updated values. Do it before 8279 * comparing this one with last received beacon. 8280 * IMPORTANT: These parameters would possibly be out of sync by the time 8281 * the driver will use them. The synchronized view is currently 8282 * guaranteed only in certain callbacks. 8283 */ 8284 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 8285 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 8286 bss_conf->sync_tsf = 8287 le64_to_cpu(mgmt->u.beacon.timestamp); 8288 bss_conf->sync_device_ts = 8289 rx_status->device_timestamp; 8290 bss_conf->sync_dtim_count = elems->dtim_count; 8291 } 8292 8293 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 8294 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 8295 parse_params.start, 8296 parse_params.len))) 8297 goto free; 8298 link->u.mgd.beacon_crc = ncrc; 8299 link->u.mgd.beacon_crc_valid = true; 8300 8301 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 8302 8303 /* 8304 * This assumes that all members of a multiple BSS set must be 8305 * switching together, so we can parse channel switch elements 8306 * from the transmitted BSS even if our non-transmitted one is 8307 * not present in this beacon (due to EMA.) 8308 */ 8309 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 8310 rx_status->device_timestamp, 8311 elems, elems, 8312 IEEE80211_CSA_SOURCE_BEACON); 8313 8314 /* 8315 * If we haven't had a beacon before, tell the driver about the 8316 * DTIM period (and beacon timing if desired) now. 8317 */ 8318 if (!link->u.mgd.have_beacon) { 8319 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 8320 bss_conf->dtim_period = elems->dtim_period ?: 1; 8321 8322 changed |= BSS_CHANGED_BEACON_INFO; 8323 link->u.mgd.have_beacon = true; 8324 8325 ieee80211_recalc_ps(local); 8326 8327 ieee80211_recalc_ps_vif(sdata); 8328 } 8329 8330 /* RNR isn't inside an MBSSID profile */ 8331 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 8332 8333 /* assume ERP would be inherited anyway */ 8334 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) { 8335 u8 erp_value = 0; 8336 bool erp_valid; 8337 8338 if (elems->erp_info) { 8339 erp_valid = true; 8340 erp_value = elems->erp_info[0]; 8341 } else { 8342 erp_valid = false; 8343 } 8344 8345 changed |= ieee80211_handle_bss_capability(link, 8346 le16_to_cpu(mgmt->u.beacon.capab_info), 8347 erp_valid, erp_value); 8348 } 8349 8350 /* 8351 * There are some other things that we can only do when the 8352 * real non-transmitted profile was actually parsed, so exit 8353 * here before doing those. 8354 */ 8355 if (elems->mbssid_nontx_profile_missing) 8356 goto apply; 8357 8358 /* 8359 * This requires multi-link element, which is from the MBSSID profile. 8360 * Note that after this elems->ml_basic can no longer be used fully. 8361 * 8362 * Note also that currently the parsing is incorrect, so this will 8363 * never actually do anything. 8364 */ 8365 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 8366 8367 /* 8368 * EDCA parameters should be the same, but perhaps ACM can differ 8369 * between BSSes in an MBSSID set. 8370 */ 8371 if (!sdata->u.mgd.epcs.enabled && 8372 !link->u.mgd.disable_wmm_tracking && 8373 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 8374 elems->wmm_param_len, 8375 elems->mu_edca_param_set)) 8376 changed |= BSS_CHANGED_QOS; 8377 8378 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8379 if (WARN_ON(!sta)) { 8380 goto free; 8381 } 8382 link_sta = rcu_dereference_protected(sta->link[link->link_id], 8383 lockdep_is_held(&local->hw.wiphy->mtx)); 8384 if (WARN_ON(!link_sta)) { 8385 goto free; 8386 } 8387 8388 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 8389 goto free; 8390 8391 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 8392 8393 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 8394 8395 if (ieee80211_config_bw(link, elems, true, &changed, 8396 IEEE80211_STYPE_BEACON)) { 8397 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8398 WLAN_REASON_DEAUTH_LEAVING, 8399 true, deauth_buf); 8400 ieee80211_report_disconnect(sdata, deauth_buf, 8401 sizeof(deauth_buf), true, 8402 WLAN_REASON_DEAUTH_LEAVING, 8403 false); 8404 goto free; 8405 } 8406 8407 if (elems->opmode_notif) 8408 ieee80211_vht_handle_opmode(sdata, link_sta, 8409 *elems->opmode_notif, 8410 rx_status->band); 8411 8412 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 8413 elems->country_elem, 8414 elems->country_elem_len, 8415 elems->pwr_constr_elem, 8416 elems->cisco_dtpc_elem); 8417 8418 ieee80211_ml_reconfiguration(sdata, elems); 8419 ieee80211_process_adv_ttlm(sdata, elems, 8420 le64_to_cpu(mgmt->u.beacon.timestamp)); 8421 8422 apply: 8423 ieee80211_link_info_change_notify(sdata, link, changed); 8424 free: 8425 kfree(elems); 8426 } 8427 8428 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8429 struct ieee80211_neg_ttlm neg_ttlm) 8430 { 8431 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 8432 u8 i; 8433 8434 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 8435 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 8436 8437 /* If there is an active TTLM, unset previously suspended links */ 8438 if (sdata->vif.neg_ttlm.valid) 8439 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 8440 8441 /* exclude links that are already disabled by advertised TTLM */ 8442 new_active_links = 8443 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 8444 new_suspended_links = 8445 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 8446 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 8447 if (ieee80211_ttlm_set_links(sdata, new_active_links, 8448 new_dormant_links, new_suspended_links)) 8449 return; 8450 8451 sdata->vif.neg_ttlm = neg_ttlm; 8452 sdata->vif.neg_ttlm.valid = true; 8453 } 8454 8455 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 8456 struct wiphy_work *work) 8457 { 8458 struct ieee80211_sub_if_data *sdata = 8459 container_of(work, struct ieee80211_sub_if_data, 8460 u.mgd.neg_ttlm_timeout_work.work); 8461 8462 sdata_info(sdata, 8463 "No negotiated TTLM response from AP, disconnecting.\n"); 8464 8465 __ieee80211_disconnect(sdata); 8466 } 8467 8468 static void 8469 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 8470 struct ieee80211_neg_ttlm *neg_ttlm) 8471 { 8472 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 8473 8474 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 8475 sizeof(neg_ttlm->downlink))) { 8476 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 8477 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 8478 } else { 8479 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 8480 } 8481 8482 for (i = 0; i < ARRAY_SIZE(direction); i++) { 8483 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 8484 __le16 map; 8485 8486 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 8487 8488 pos = skb_put(skb, len + 2); 8489 *pos++ = WLAN_EID_EXTENSION; 8490 len_pos = pos++; 8491 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 8492 *pos++ = direction[i]; 8493 map_ind_pos = pos++; 8494 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8495 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 8496 cpu_to_le16(neg_ttlm->uplink[tid]) : 8497 cpu_to_le16(neg_ttlm->downlink[tid]); 8498 if (!map) 8499 continue; 8500 8501 len += 2; 8502 map_ind |= BIT(tid); 8503 skb_put_data(skb, &map, sizeof(map)); 8504 } 8505 8506 *map_ind_pos = map_ind; 8507 *len_pos = len; 8508 8509 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 8510 break; 8511 } 8512 } 8513 8514 static void 8515 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8516 struct ieee80211_neg_ttlm *neg_ttlm, 8517 u8 dialog_token) 8518 { 8519 struct ieee80211_local *local = sdata->local; 8520 struct ieee80211_mgmt *mgmt; 8521 struct sk_buff *skb; 8522 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8523 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8524 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8525 8526 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8527 if (!skb) 8528 return; 8529 8530 skb_reserve(skb, local->tx_headroom); 8531 mgmt = skb_put_zero(skb, hdr_len); 8532 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8533 IEEE80211_STYPE_ACTION); 8534 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8535 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8536 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8537 8538 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8539 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 8540 mgmt->u.action.ttlm_req.dialog_token = dialog_token; 8541 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8542 ieee80211_tx_skb(sdata, skb); 8543 } 8544 8545 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8546 struct cfg80211_ttlm_params *params) 8547 { 8548 struct ieee80211_neg_ttlm neg_ttlm = {}; 8549 u8 i; 8550 8551 if (!ieee80211_vif_is_mld(&sdata->vif) || 8552 !(sdata->vif.cfg.mld_capa_op & 8553 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 8554 return -EINVAL; 8555 8556 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8557 if ((params->dlink[i] & ~sdata->vif.valid_links) || 8558 (params->ulink[i] & ~sdata->vif.valid_links)) 8559 return -EINVAL; 8560 8561 neg_ttlm.downlink[i] = params->dlink[i]; 8562 neg_ttlm.uplink[i] = params->ulink[i]; 8563 } 8564 8565 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 8566 NEG_TTLM_RES_ACCEPT) 8567 return -EINVAL; 8568 8569 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8570 sdata->u.mgd.dialog_token_alloc++; 8571 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 8572 sdata->u.mgd.dialog_token_alloc); 8573 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8574 &sdata->u.mgd.neg_ttlm_timeout_work); 8575 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 8576 &sdata->u.mgd.neg_ttlm_timeout_work, 8577 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 8578 return 0; 8579 } 8580 8581 static void 8582 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8583 enum ieee80211_neg_ttlm_res ttlm_res, 8584 u8 dialog_token, 8585 struct ieee80211_neg_ttlm *neg_ttlm) 8586 { 8587 struct ieee80211_local *local = sdata->local; 8588 struct ieee80211_mgmt *mgmt; 8589 struct sk_buff *skb; 8590 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_res); 8591 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8592 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8593 u16 status_code; 8594 8595 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8596 if (!skb) 8597 return; 8598 8599 skb_reserve(skb, local->tx_headroom); 8600 mgmt = skb_put_zero(skb, hdr_len); 8601 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8602 IEEE80211_STYPE_ACTION); 8603 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8604 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8605 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8606 8607 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8608 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 8609 mgmt->u.action.ttlm_res.dialog_token = dialog_token; 8610 switch (ttlm_res) { 8611 default: 8612 WARN_ON(1); 8613 fallthrough; 8614 case NEG_TTLM_RES_REJECT: 8615 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 8616 break; 8617 case NEG_TTLM_RES_ACCEPT: 8618 status_code = WLAN_STATUS_SUCCESS; 8619 break; 8620 case NEG_TTLM_RES_SUGGEST_PREFERRED: 8621 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 8622 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8623 break; 8624 } 8625 8626 mgmt->u.action.ttlm_res.status_code = cpu_to_le16(status_code); 8627 ieee80211_tx_skb(sdata, skb); 8628 } 8629 8630 VISIBLE_IF_MAC80211_KUNIT int 8631 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8632 const struct ieee80211_ttlm_elem *ttlm, 8633 struct ieee80211_neg_ttlm *neg_ttlm, 8634 u8 *direction) 8635 { 8636 u8 control, link_map_presence, map_size, tid; 8637 u8 *pos; 8638 8639 /* The element size was already validated in 8640 * ieee80211_tid_to_link_map_size_ok() 8641 */ 8642 pos = (void *)ttlm->optional; 8643 8644 control = ttlm->control; 8645 8646 /* mapping switch time and expected duration fields are not expected 8647 * in case of negotiated TTLM 8648 */ 8649 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 8650 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 8651 mlme_dbg(sdata, 8652 "Invalid TTLM element in negotiated TTLM request\n"); 8653 return -EINVAL; 8654 } 8655 8656 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 8657 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8658 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 8659 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 8660 } 8661 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 8662 return 0; 8663 } 8664 8665 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 8666 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 8667 *direction != IEEE80211_TTLM_DIRECTION_UP && 8668 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 8669 return -EINVAL; 8670 8671 link_map_presence = *pos; 8672 pos++; 8673 8674 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 8675 map_size = 1; 8676 else 8677 map_size = 2; 8678 8679 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8680 u16 map; 8681 8682 if (link_map_presence & BIT(tid)) { 8683 map = ieee80211_get_ttlm(map_size, pos); 8684 if (!map) { 8685 mlme_dbg(sdata, 8686 "No active links for TID %d", tid); 8687 return -EINVAL; 8688 } 8689 pos += map_size; 8690 } else { 8691 map = 0; 8692 } 8693 8694 switch (*direction) { 8695 case IEEE80211_TTLM_DIRECTION_BOTH: 8696 neg_ttlm->downlink[tid] = map; 8697 neg_ttlm->uplink[tid] = map; 8698 break; 8699 case IEEE80211_TTLM_DIRECTION_DOWN: 8700 neg_ttlm->downlink[tid] = map; 8701 break; 8702 case IEEE80211_TTLM_DIRECTION_UP: 8703 neg_ttlm->uplink[tid] = map; 8704 break; 8705 default: 8706 return -EINVAL; 8707 } 8708 } 8709 return 0; 8710 } 8711 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_parse_neg_ttlm); 8712 8713 static void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8714 struct ieee80211_mgmt *mgmt, 8715 size_t len) 8716 { 8717 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 8718 size_t ies_len; 8719 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 8720 struct ieee802_11_elems *elems = NULL; 8721 struct ieee80211_neg_ttlm neg_ttlm = {}; 8722 8723 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 8724 8725 if (!ieee80211_vif_is_mld(&sdata->vif)) 8726 return; 8727 8728 dialog_token = mgmt->u.action.ttlm_req.dialog_token; 8729 ies_len = len - IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8730 elems = ieee802_11_parse_elems(mgmt->u.action.ttlm_req.variable, 8731 ies_len, 8732 IEEE80211_FTYPE_MGMT | 8733 IEEE80211_STYPE_ACTION, 8734 NULL); 8735 if (!elems) { 8736 ttlm_res = NEG_TTLM_RES_REJECT; 8737 goto out; 8738 } 8739 8740 for (i = 0; i < elems->ttlm_num; i++) { 8741 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8742 &neg_ttlm, &direction[i]) || 8743 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8744 elems->ttlm_num != 1)) { 8745 ttlm_res = NEG_TTLM_RES_REJECT; 8746 goto out; 8747 } 8748 } 8749 8750 if (!elems->ttlm_num || 8751 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8752 ttlm_res = NEG_TTLM_RES_REJECT; 8753 goto out; 8754 } 8755 8756 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8757 if ((neg_ttlm.downlink[i] && 8758 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8759 (neg_ttlm.uplink[i] && 8760 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8761 ttlm_res = NEG_TTLM_RES_REJECT; 8762 goto out; 8763 } 8764 } 8765 8766 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8767 8768 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8769 goto out; 8770 8771 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8772 out: 8773 kfree(elems); 8774 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8775 } 8776 8777 static void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8778 struct ieee80211_mgmt *mgmt, 8779 size_t len) 8780 { 8781 if (!ieee80211_vif_is_mld(&sdata->vif) || 8782 mgmt->u.action.ttlm_res.dialog_token != sdata->u.mgd.dialog_token_alloc) 8783 return; 8784 8785 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8786 &sdata->u.mgd.neg_ttlm_timeout_work); 8787 8788 /* MLD station sends a TID to link mapping request, mainly to handle 8789 * BTM (BSS transition management) request, in which case it needs to 8790 * restrict the active links set. 8791 * In this case it's not expected that the MLD AP will reject the 8792 * negotiated TTLM request. 8793 * This can be better implemented in the future, to handle request 8794 * rejections. 8795 */ 8796 if (le16_to_cpu(mgmt->u.action.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8797 __ieee80211_disconnect(sdata); 8798 } 8799 8800 static void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8801 { 8802 u16 new_dormant_links; 8803 8804 if (!sdata->vif.neg_ttlm.valid) 8805 return; 8806 8807 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8808 new_dormant_links = 8809 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8810 sdata->vif.suspended_links = 0; 8811 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8812 new_dormant_links); 8813 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8814 BSS_CHANGED_MLD_VALID_LINKS); 8815 } 8816 8817 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8818 struct wiphy_work *work) 8819 { 8820 struct ieee80211_sub_if_data *sdata = 8821 container_of(work, struct ieee80211_sub_if_data, 8822 u.mgd.teardown_ttlm_work); 8823 8824 ieee80211_process_ttlm_teardown(sdata); 8825 } 8826 8827 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8828 { 8829 int frame_len = IEEE80211_MIN_ACTION_SIZE(ttlm_tear_down); 8830 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8831 struct ieee80211_local *local = sdata->local; 8832 struct ieee80211_mgmt *mgmt; 8833 struct sk_buff *skb; 8834 struct ieee80211_tx_info *info; 8835 8836 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8837 if (!skb) 8838 return; 8839 8840 skb_reserve(skb, local->hw.extra_tx_headroom); 8841 mgmt = skb_put_zero(skb, frame_len); 8842 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8843 IEEE80211_STYPE_ACTION); 8844 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8845 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8846 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8847 8848 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8849 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8850 8851 info = IEEE80211_SKB_CB(skb); 8852 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8853 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8854 ieee80211_tx_skb(sdata, skb); 8855 } 8856 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8857 8858 static void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8859 struct sk_buff *skb) 8860 { 8861 struct ieee80211_link_data *link = &sdata->deflink; 8862 struct ieee80211_rx_status *rx_status; 8863 struct ieee80211_hdr *hdr; 8864 u16 fc; 8865 8866 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8867 8868 rx_status = (struct ieee80211_rx_status *) skb->cb; 8869 hdr = (struct ieee80211_hdr *) skb->data; 8870 fc = le16_to_cpu(hdr->frame_control); 8871 8872 switch (fc & IEEE80211_FCTL_STYPE) { 8873 case IEEE80211_STYPE_S1G_BEACON: 8874 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8875 break; 8876 } 8877 } 8878 8879 static void ieee80211_sta_timer(struct timer_list *t) 8880 { 8881 struct ieee80211_sub_if_data *sdata = 8882 timer_container_of(sdata, t, u.mgd.timer); 8883 8884 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8885 } 8886 8887 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8888 u8 reason, bool tx) 8889 { 8890 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8891 8892 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8893 tx, frame_buf); 8894 8895 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8896 reason, false); 8897 } 8898 8899 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8900 { 8901 struct ieee80211_local *local = sdata->local; 8902 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8903 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8904 u32 tx_flags = 0; 8905 u16 trans = 1; 8906 u16 status = 0; 8907 struct ieee80211_prep_tx_info info = { 8908 .subtype = IEEE80211_STYPE_AUTH, 8909 }; 8910 8911 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8912 8913 if (WARN_ON_ONCE(!auth_data)) 8914 return -EINVAL; 8915 8916 if (auth_data->algorithm == WLAN_AUTH_EPPKE && 8917 ieee80211_vif_is_mld(&sdata->vif) && 8918 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 8919 auth_data->data, auth_data->data_len)) 8920 return -EINVAL; 8921 8922 auth_data->tries++; 8923 8924 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8925 sdata_info(sdata, "authentication with %pM timed out\n", 8926 auth_data->ap_addr); 8927 8928 /* 8929 * Most likely AP is not in the range so remove the 8930 * bss struct for that AP. 8931 */ 8932 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8933 8934 return -ETIMEDOUT; 8935 } 8936 8937 if (auth_data->algorithm == WLAN_AUTH_SAE || 8938 auth_data->algorithm == WLAN_AUTH_EPPKE) 8939 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8940 8941 info.link_id = auth_data->link_id; 8942 drv_mgd_prepare_tx(local, sdata, &info); 8943 8944 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8945 auth_data->ap_addr, auth_data->tries, 8946 IEEE80211_AUTH_MAX_TRIES); 8947 8948 auth_data->expected_transaction = 2; 8949 8950 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8951 trans = auth_data->trans; 8952 status = auth_data->status; 8953 auth_data->expected_transaction = trans; 8954 } else if (auth_data->algorithm == WLAN_AUTH_EPPKE) { 8955 trans = auth_data->trans; 8956 status = auth_data->status; 8957 } else if (auth_data->algorithm == WLAN_AUTH_IEEE8021X) { 8958 trans = auth_data->trans; 8959 status = auth_data->status; 8960 auth_data->expected_transaction = trans + 1; 8961 } 8962 8963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8964 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8965 IEEE80211_TX_INTFL_MLME_CONN_TX; 8966 8967 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8968 auth_data->data, auth_data->data_len, 8969 auth_data->ap_addr, auth_data->ap_addr, 8970 NULL, 0, 0, tx_flags); 8971 8972 if (tx_flags == 0) { 8973 if (auth_data->algorithm == WLAN_AUTH_SAE) 8974 auth_data->timeout = jiffies + 8975 IEEE80211_AUTH_TIMEOUT_SAE; 8976 else 8977 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8978 } else { 8979 auth_data->timeout = 8980 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8981 } 8982 8983 auth_data->timeout_started = true; 8984 run_again(sdata, auth_data->timeout); 8985 8986 return 0; 8987 } 8988 8989 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8990 { 8991 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8992 struct ieee80211_local *local = sdata->local; 8993 int ret; 8994 8995 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8996 8997 assoc_data->tries++; 8998 assoc_data->comeback = false; 8999 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 9000 sdata_info(sdata, "association with %pM timed out\n", 9001 assoc_data->ap_addr); 9002 9003 /* 9004 * Most likely AP is not in the range so remove the 9005 * bss struct for that AP. 9006 */ 9007 cfg80211_unlink_bss(local->hw.wiphy, 9008 assoc_data->link[assoc_data->assoc_link_id].bss); 9009 9010 return -ETIMEDOUT; 9011 } 9012 9013 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 9014 assoc_data->ap_addr, assoc_data->tries, 9015 IEEE80211_ASSOC_MAX_TRIES); 9016 ret = ieee80211_send_assoc(sdata); 9017 if (ret) 9018 return ret; 9019 9020 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 9021 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 9022 assoc_data->timeout_started = true; 9023 run_again(sdata, assoc_data->timeout); 9024 } else { 9025 assoc_data->timeout = 9026 round_jiffies_up(jiffies + 9027 IEEE80211_ASSOC_TIMEOUT_LONG); 9028 assoc_data->timeout_started = true; 9029 run_again(sdata, assoc_data->timeout); 9030 } 9031 9032 return 0; 9033 } 9034 9035 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 9036 __le16 fc, bool acked) 9037 { 9038 struct ieee80211_local *local = sdata->local; 9039 9040 sdata->u.mgd.status_fc = fc; 9041 sdata->u.mgd.status_acked = acked; 9042 sdata->u.mgd.status_received = true; 9043 9044 wiphy_work_queue(local->hw.wiphy, &sdata->work); 9045 } 9046 9047 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 9048 { 9049 struct ieee80211_local *local = sdata->local; 9050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9051 9052 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9053 9054 if (ifmgd->status_received) { 9055 __le16 fc = ifmgd->status_fc; 9056 bool status_acked = ifmgd->status_acked; 9057 9058 ifmgd->status_received = false; 9059 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 9060 if (status_acked) { 9061 if (ifmgd->auth_data->algorithm == 9062 WLAN_AUTH_SAE) 9063 ifmgd->auth_data->timeout = 9064 jiffies + 9065 IEEE80211_AUTH_TIMEOUT_SAE; 9066 else 9067 ifmgd->auth_data->timeout = 9068 jiffies + 9069 IEEE80211_AUTH_TIMEOUT_SHORT; 9070 run_again(sdata, ifmgd->auth_data->timeout); 9071 } else { 9072 ifmgd->auth_data->timeout = jiffies - 1; 9073 } 9074 ifmgd->auth_data->timeout_started = true; 9075 } else if (ifmgd->assoc_data && 9076 !ifmgd->assoc_data->comeback && 9077 (ieee80211_is_assoc_req(fc) || 9078 ieee80211_is_reassoc_req(fc))) { 9079 /* 9080 * Update association timeout based on the TX status 9081 * for the (Re)Association Request frame. Skip this if 9082 * we have already processed a (Re)Association Response 9083 * frame that indicated need for association comeback 9084 * at a specific time in the future. This could happen 9085 * if the TX status information is delayed enough for 9086 * the response to be received and processed first. 9087 */ 9088 if (status_acked) { 9089 ifmgd->assoc_data->timeout = 9090 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 9091 run_again(sdata, ifmgd->assoc_data->timeout); 9092 } else { 9093 ifmgd->assoc_data->timeout = jiffies - 1; 9094 } 9095 ifmgd->assoc_data->timeout_started = true; 9096 } 9097 } 9098 9099 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 9100 time_after(jiffies, ifmgd->auth_data->timeout)) { 9101 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 9102 /* 9103 * ok ... we waited for assoc or continuation but 9104 * userspace didn't do it, so kill the auth data 9105 */ 9106 ieee80211_destroy_auth_data(sdata, false); 9107 } else if (ieee80211_auth(sdata)) { 9108 u8 ap_addr[ETH_ALEN]; 9109 struct ieee80211_event event = { 9110 .type = MLME_EVENT, 9111 .u.mlme.data = AUTH_EVENT, 9112 .u.mlme.status = MLME_TIMEOUT, 9113 }; 9114 9115 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 9116 9117 ieee80211_destroy_auth_data(sdata, false); 9118 9119 cfg80211_auth_timeout(sdata->dev, ap_addr); 9120 drv_event_callback(sdata->local, sdata, &event); 9121 } 9122 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 9123 run_again(sdata, ifmgd->auth_data->timeout); 9124 9125 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 9126 time_after(jiffies, ifmgd->assoc_data->timeout)) { 9127 if ((ifmgd->assoc_data->need_beacon && 9128 !sdata->deflink.u.mgd.have_beacon) || 9129 ieee80211_do_assoc(sdata)) { 9130 struct ieee80211_event event = { 9131 .type = MLME_EVENT, 9132 .u.mlme.data = ASSOC_EVENT, 9133 .u.mlme.status = MLME_TIMEOUT, 9134 }; 9135 9136 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9137 drv_event_callback(sdata->local, sdata, &event); 9138 } 9139 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 9140 run_again(sdata, ifmgd->assoc_data->timeout); 9141 9142 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 9143 ifmgd->associated) { 9144 u8 *bssid = sdata->deflink.u.mgd.bssid; 9145 int max_tries; 9146 9147 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 9148 max_tries = max_nullfunc_tries; 9149 else 9150 max_tries = max_probe_tries; 9151 9152 /* ACK received for nullfunc probing frame */ 9153 if (!ifmgd->probe_send_count) 9154 ieee80211_reset_ap_probe(sdata); 9155 else if (ifmgd->nullfunc_failed) { 9156 if (ifmgd->probe_send_count < max_tries) { 9157 mlme_dbg(sdata, 9158 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 9159 bssid, ifmgd->probe_send_count, 9160 max_tries); 9161 ieee80211_mgd_probe_ap_send(sdata); 9162 } else { 9163 mlme_dbg(sdata, 9164 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 9165 bssid); 9166 ieee80211_sta_connection_lost(sdata, 9167 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 9168 false); 9169 } 9170 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 9171 run_again(sdata, ifmgd->probe_timeout); 9172 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 9173 mlme_dbg(sdata, 9174 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 9175 bssid, probe_wait_ms); 9176 ieee80211_sta_connection_lost(sdata, 9177 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 9178 } else if (ifmgd->probe_send_count < max_tries) { 9179 mlme_dbg(sdata, 9180 "No probe response from AP %pM after %dms, try %d/%i\n", 9181 bssid, probe_wait_ms, 9182 ifmgd->probe_send_count, max_tries); 9183 ieee80211_mgd_probe_ap_send(sdata); 9184 } else { 9185 /* 9186 * We actually lost the connection ... or did we? 9187 * Let's make sure! 9188 */ 9189 mlme_dbg(sdata, 9190 "No probe response from AP %pM after %dms, disconnecting.\n", 9191 bssid, probe_wait_ms); 9192 9193 ieee80211_sta_connection_lost(sdata, 9194 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 9195 } 9196 } 9197 } 9198 9199 static bool 9200 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 9201 { 9202 /* 9203 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 9204 * the links. 9205 */ 9206 struct ieee80211_link_data *link; 9207 9208 guard(rcu)(); 9209 9210 for_each_link_data_rcu(sdata, link) { 9211 if (!(link->conf->csa_active && 9212 !link->u.mgd.csa.waiting_bcn)) 9213 return false; 9214 } 9215 9216 return true; 9217 } 9218 9219 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 9220 { 9221 struct ieee80211_sub_if_data *sdata = 9222 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 9223 9224 if (ieee80211_is_csa_in_progress(sdata)) 9225 return; 9226 9227 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 9228 return; 9229 9230 sdata->u.mgd.connection_loss = false; 9231 wiphy_work_queue(sdata->local->hw.wiphy, 9232 &sdata->u.mgd.beacon_connection_loss_work); 9233 } 9234 9235 static unsigned long 9236 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 9237 { 9238 unsigned long latest_timeout = jiffies; 9239 unsigned int link_id; 9240 struct sta_info *sta; 9241 9242 guard(rcu)(); 9243 9244 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 9245 if (!sta) 9246 return 0; 9247 9248 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 9249 link_id++) { 9250 struct link_sta_info *link_sta; 9251 unsigned long timeout; 9252 9253 link_sta = rcu_dereference(sta->link[link_id]); 9254 if (!link_sta) 9255 continue; 9256 9257 timeout = link_sta->status_stats.last_ack; 9258 if (time_before(timeout, link_sta->rx_stats.last_rx)) 9259 timeout = link_sta->rx_stats.last_rx; 9260 9261 timeout += IEEE80211_CONNECTION_IDLE_TIME; 9262 9263 /* 9264 * latest_timeout holds the timeout of the link 9265 * that will expire last among all links in an 9266 * non-AP MLD STA. This ensures that the connection 9267 * monitor timer is only reset if at least one link 9268 * is still active, and it is scheduled to fire at 9269 * the latest possible timeout. 9270 */ 9271 if (time_after(timeout, latest_timeout)) 9272 latest_timeout = timeout; 9273 } 9274 9275 return latest_timeout; 9276 } 9277 9278 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 9279 { 9280 struct ieee80211_sub_if_data *sdata = 9281 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 9282 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9283 struct ieee80211_local *local = sdata->local; 9284 unsigned long latest_timeout; 9285 9286 if (ieee80211_is_csa_in_progress(sdata)) 9287 return; 9288 9289 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 9290 9291 /* 9292 * If latest timeout is after now, then update timer to fire at 9293 * the later date, but do not actually probe at this time. 9294 */ 9295 if (time_is_after_jiffies(latest_timeout)) { 9296 mod_timer(&ifmgd->conn_mon_timer, 9297 round_jiffies_up(latest_timeout)); 9298 return; 9299 } 9300 9301 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 9302 } 9303 9304 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 9305 struct wiphy_work *work) 9306 { 9307 struct ieee80211_sub_if_data *sdata = 9308 container_of(work, struct ieee80211_sub_if_data, 9309 u.mgd.monitor_work); 9310 9311 ieee80211_mgd_probe_ap(sdata, false); 9312 } 9313 9314 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 9315 { 9316 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 9317 __ieee80211_stop_poll(sdata); 9318 9319 /* let's probe the connection once */ 9320 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 9321 wiphy_work_queue(sdata->local->hw.wiphy, 9322 &sdata->u.mgd.monitor_work); 9323 } 9324 } 9325 9326 #ifdef CONFIG_PM 9327 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 9328 { 9329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9330 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9331 9332 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9333 9334 if (ifmgd->auth_data || ifmgd->assoc_data) { 9335 const u8 *ap_addr = ifmgd->auth_data ? 9336 ifmgd->auth_data->ap_addr : 9337 ifmgd->assoc_data->ap_addr; 9338 9339 /* 9340 * If we are trying to authenticate / associate while suspending, 9341 * cfg80211 won't know and won't actually abort those attempts, 9342 * thus we need to do that ourselves. 9343 */ 9344 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 9345 IEEE80211_STYPE_DEAUTH, 9346 WLAN_REASON_DEAUTH_LEAVING, 9347 false, frame_buf); 9348 if (ifmgd->assoc_data) 9349 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9350 if (ifmgd->auth_data) 9351 ieee80211_destroy_auth_data(sdata, false); 9352 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 9353 IEEE80211_DEAUTH_FRAME_LEN, 9354 false); 9355 } 9356 9357 /* This is a bit of a hack - we should find a better and more generic 9358 * solution to this. Normally when suspending, cfg80211 will in fact 9359 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 9360 * auth (not so important) or assoc (this is the problem) process. 9361 * 9362 * As a consequence, it can happen that we are in the process of both 9363 * associating and suspending, and receive an association response 9364 * after cfg80211 has checked if it needs to disconnect, but before 9365 * we actually set the flag to drop incoming frames. This will then 9366 * cause the workqueue flush to process the association response in 9367 * the suspend, resulting in a successful association just before it 9368 * tries to remove the interface from the driver, which now though 9369 * has a channel context assigned ... this results in issues. 9370 * 9371 * To work around this (for now) simply deauth here again if we're 9372 * now connected. 9373 */ 9374 if (ifmgd->associated && !sdata->local->wowlan) { 9375 u8 bssid[ETH_ALEN]; 9376 struct cfg80211_deauth_request req = { 9377 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 9378 .bssid = bssid, 9379 }; 9380 9381 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 9382 ieee80211_mgd_deauth(sdata, &req); 9383 } 9384 } 9385 #endif 9386 9387 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 9388 { 9389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9390 9391 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9392 9393 if (!ifmgd->associated) 9394 return; 9395 9396 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 9397 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 9398 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 9399 ieee80211_sta_connection_lost(sdata, 9400 WLAN_REASON_UNSPECIFIED, 9401 true); 9402 return; 9403 } 9404 9405 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 9406 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 9407 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 9408 ieee80211_sta_connection_lost(sdata, 9409 WLAN_REASON_UNSPECIFIED, 9410 true); 9411 return; 9412 } 9413 } 9414 9415 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 9416 struct wiphy_work *work) 9417 { 9418 struct ieee80211_link_data *link = 9419 container_of(work, struct ieee80211_link_data, 9420 u.mgd.request_smps_work); 9421 9422 __ieee80211_request_smps_mgd(link->sdata, link, 9423 link->u.mgd.driver_smps_mode); 9424 } 9425 9426 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 9427 struct wiphy_work *work) 9428 { 9429 struct ieee80211_sub_if_data *sdata = 9430 container_of(work, struct ieee80211_sub_if_data, 9431 u.mgd.reconf.wk.work); 9432 9433 if (!sdata->u.mgd.reconf.added_links && 9434 !sdata->u.mgd.reconf.removed_links) 9435 return; 9436 9437 sdata_info(sdata, 9438 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 9439 sdata->u.mgd.reconf.added_links, 9440 sdata->u.mgd.reconf.removed_links); 9441 9442 __ieee80211_disconnect(sdata); 9443 } 9444 9445 /* interface setup */ 9446 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 9447 { 9448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9449 9450 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 9451 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 9452 ieee80211_beacon_connection_loss_work); 9453 wiphy_work_init(&ifmgd->csa_connection_drop_work, 9454 ieee80211_csa_connection_drop_work); 9455 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 9456 ieee80211_tdls_peer_del_work); 9457 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 9458 ieee80211_ml_reconf_work); 9459 wiphy_delayed_work_init(&ifmgd->reconf.wk, 9460 ieee80211_ml_sta_reconf_timeout); 9461 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 9462 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 9463 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 9464 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 9465 ieee80211_sta_handle_tspec_ac_params_wk); 9466 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 9467 ieee80211_tid_to_link_map_work); 9468 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 9469 ieee80211_neg_ttlm_timeout_work); 9470 wiphy_work_init(&ifmgd->teardown_ttlm_work, 9471 ieee80211_teardown_ttlm_work); 9472 wiphy_hrtimer_work_init(&ifmgd->uhr_omp.status_work, 9473 ieee80211_uhr_omp_req_status_wk); 9474 9475 ifmgd->flags = 0; 9476 ifmgd->powersave = sdata->wdev.ps; 9477 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 9478 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 9479 /* Setup TDLS data */ 9480 spin_lock_init(&ifmgd->teardown_lock); 9481 ifmgd->teardown_skb = NULL; 9482 ifmgd->orig_teardown_skb = NULL; 9483 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 9484 } 9485 9486 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 9487 struct wiphy_work *work) 9488 { 9489 struct ieee80211_link_data *link = 9490 container_of(work, struct ieee80211_link_data, 9491 u.mgd.recalc_smps); 9492 9493 ieee80211_recalc_smps(link->sdata, link); 9494 } 9495 9496 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 9497 { 9498 struct ieee80211_sub_if_data *sdata = link->sdata; 9499 struct ieee80211_local *local = sdata->local; 9500 unsigned int link_id = link->link_id; 9501 9502 link->u.mgd.p2p_noa_index = -1; 9503 link->conf->bssid = link->u.mgd.bssid; 9504 link->smps_mode = IEEE80211_SMPS_OFF; 9505 9506 wiphy_work_init(&link->u.mgd.request_smps_work, 9507 ieee80211_request_smps_mgd_work); 9508 wiphy_work_init(&link->u.mgd.recalc_smps, 9509 ieee80211_recalc_smps_work); 9510 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 9511 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 9512 else 9513 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 9514 9515 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 9516 ieee80211_csa_switch_work); 9517 9518 ieee80211_clear_tpe(&link->conf->tpe); 9519 9520 if (sdata->u.mgd.assoc_data) 9521 ether_addr_copy(link->conf->addr, 9522 sdata->u.mgd.assoc_data->link[link_id].addr); 9523 else if (sdata->u.mgd.reconf.add_links_data) 9524 ether_addr_copy(link->conf->addr, 9525 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 9526 else if (!is_valid_ether_addr(link->conf->addr)) 9527 eth_random_addr(link->conf->addr); 9528 } 9529 9530 /* scan finished notification */ 9531 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 9532 { 9533 struct ieee80211_sub_if_data *sdata; 9534 9535 /* Restart STA timers */ 9536 rcu_read_lock(); 9537 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 9538 if (ieee80211_sdata_running(sdata)) 9539 ieee80211_restart_sta_timer(sdata); 9540 } 9541 rcu_read_unlock(); 9542 } 9543 9544 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 9545 struct cfg80211_bss *cbss, s8 link_id, 9546 const u8 *ap_mld_addr, bool assoc, 9547 struct ieee80211_conn_settings *conn, 9548 bool override, 9549 unsigned long *userspace_selectors) 9550 { 9551 struct ieee80211_local *local = sdata->local; 9552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9553 struct ieee80211_bss *bss = (void *)cbss->priv; 9554 struct sta_info *new_sta = NULL; 9555 struct ieee80211_link_data *link; 9556 struct sta_info *have_sta = NULL; 9557 bool mlo; 9558 int err; 9559 u16 new_links; 9560 9561 if (link_id >= 0) { 9562 mlo = true; 9563 if (WARN_ON(!ap_mld_addr)) 9564 return -EINVAL; 9565 new_links = BIT(link_id); 9566 } else { 9567 if (WARN_ON(ap_mld_addr)) 9568 return -EINVAL; 9569 ap_mld_addr = cbss->bssid; 9570 new_links = 0; 9571 link_id = 0; 9572 mlo = false; 9573 } 9574 9575 if (assoc) 9576 have_sta = sta_info_get(sdata, ap_mld_addr); 9577 9578 if (mlo && !have_sta && 9579 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 9580 return -EINVAL; 9581 9582 err = ieee80211_vif_set_links(sdata, new_links, 0); 9583 if (err) 9584 return err; 9585 9586 link = sdata_dereference(sdata->link[link_id], sdata); 9587 if (WARN_ON(!link)) { 9588 err = -ENOLINK; 9589 goto out_err; 9590 } 9591 9592 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 9593 err = -EINVAL; 9594 goto out_err; 9595 } 9596 9597 /* If a reconfig is happening, bail out */ 9598 if (local->in_reconfig) { 9599 err = -EBUSY; 9600 goto out_err; 9601 } 9602 9603 if (!have_sta) { 9604 if (mlo) 9605 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 9606 link_id, cbss->bssid, 9607 GFP_KERNEL); 9608 else 9609 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 9610 9611 if (!new_sta) { 9612 err = -ENOMEM; 9613 goto out_err; 9614 } 9615 9616 if (ifmgd->auth_data && 9617 (ifmgd->auth_data->algorithm == WLAN_AUTH_EPPKE || 9618 ifmgd->auth_data->algorithm == WLAN_AUTH_IEEE8021X)) 9619 new_sta->sta.epp_peer = true; 9620 9621 new_sta->sta.mlo = mlo; 9622 } 9623 9624 /* 9625 * Set up the information for the new channel before setting the 9626 * new channel. We can't - completely race-free - change the basic 9627 * rates bitmap and the channel (sband) that it refers to, but if 9628 * we set it up before we at least avoid calling into the driver's 9629 * bss_info_changed() method with invalid information (since we do 9630 * call that from changing the channel - only for IDLE and perhaps 9631 * some others, but ...). 9632 * 9633 * So to avoid that, just set up all the new information before the 9634 * channel, but tell the driver to apply it only afterwards, since 9635 * it might need the new channel for that. 9636 */ 9637 if (new_sta) { 9638 const struct cfg80211_bss_ies *ies; 9639 struct link_sta_info *link_sta; 9640 9641 rcu_read_lock(); 9642 link_sta = rcu_dereference(new_sta->link[link_id]); 9643 if (WARN_ON(!link_sta)) { 9644 rcu_read_unlock(); 9645 sta_info_free(local, new_sta); 9646 err = -EINVAL; 9647 goto out_err; 9648 } 9649 9650 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9651 link_sta, cbss); 9652 if (err) { 9653 rcu_read_unlock(); 9654 sta_info_free(local, new_sta); 9655 goto out_err; 9656 } 9657 9658 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9659 9660 /* set timing information */ 9661 link->conf->beacon_int = cbss->beacon_interval; 9662 ies = rcu_dereference(cbss->beacon_ies); 9663 if (ies) { 9664 link->conf->sync_tsf = ies->tsf; 9665 link->conf->sync_device_ts = 9666 bss->device_ts_beacon; 9667 9668 ieee80211_get_dtim(ies, 9669 &link->conf->sync_dtim_count, 9670 NULL); 9671 } else if (!ieee80211_hw_check(&sdata->local->hw, 9672 TIMING_BEACON_ONLY)) { 9673 ies = rcu_dereference(cbss->proberesp_ies); 9674 /* must be non-NULL since beacon IEs were NULL */ 9675 link->conf->sync_tsf = ies->tsf; 9676 link->conf->sync_device_ts = 9677 bss->device_ts_presp; 9678 link->conf->sync_dtim_count = 0; 9679 } else { 9680 link->conf->sync_tsf = 0; 9681 link->conf->sync_device_ts = 0; 9682 link->conf->sync_dtim_count = 0; 9683 } 9684 rcu_read_unlock(); 9685 } 9686 9687 if (new_sta || override) { 9688 struct link_sta_info *link_sta; 9689 struct sta_info *ap; 9690 9691 /* 9692 * Only set this if we're also going to calculate the AP 9693 * settings etc., otherwise this was set before in a 9694 * previous call. Note override is set to %true in assoc 9695 * if the settings were changed. 9696 */ 9697 link->u.mgd.conn = *conn; 9698 9699 ap = new_sta ?: have_sta; 9700 link_sta = sdata_dereference(ap->link[link->link_id], sdata); 9701 if (!link_sta) { 9702 err = -EINVAL; 9703 if (new_sta) 9704 sta_info_free(local, new_sta); 9705 goto out_err; 9706 } 9707 9708 err = ieee80211_prep_channel(sdata, link, link_sta, 9709 link->link_id, cbss, 9710 mlo, &link->u.mgd.conn, 9711 userspace_selectors); 9712 if (err) { 9713 if (new_sta) 9714 sta_info_free(local, new_sta); 9715 goto out_err; 9716 } 9717 /* pass out for use in assoc */ 9718 *conn = link->u.mgd.conn; 9719 } 9720 9721 if (new_sta) { 9722 /* 9723 * tell driver about BSSID, basic rates and timing 9724 * this was set up above, before setting the channel 9725 */ 9726 ieee80211_link_info_change_notify(sdata, link, 9727 BSS_CHANGED_BSSID | 9728 BSS_CHANGED_BASIC_RATES | 9729 BSS_CHANGED_BEACON_INT); 9730 9731 if (assoc) 9732 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9733 9734 err = sta_info_insert(new_sta); 9735 new_sta = NULL; 9736 if (err) { 9737 sdata_info(sdata, 9738 "failed to insert STA entry for the AP (error %d)\n", 9739 err); 9740 goto out_release_chan; 9741 } 9742 } else 9743 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9744 9745 /* Cancel scan to ensure that nothing interferes with connection */ 9746 if (local->scanning) 9747 ieee80211_scan_cancel(local); 9748 9749 return 0; 9750 9751 out_release_chan: 9752 ieee80211_link_release_channel(link); 9753 out_err: 9754 if (mlo && have_sta) 9755 WARN_ON(__sta_info_destroy(have_sta)); 9756 ieee80211_vif_set_links(sdata, 0, 0); 9757 return err; 9758 } 9759 9760 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9761 const struct cfg80211_bss_ies *ies, 9762 u8 cur_channel, bool ignore_ecsa) 9763 { 9764 const struct element *csa_elem, *ecsa_elem; 9765 struct ieee80211_channel_sw_ie *csa = NULL; 9766 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9767 9768 if (!ies) 9769 return false; 9770 9771 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9772 ies->data, ies->len); 9773 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9774 csa = (void *)csa_elem->data; 9775 9776 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9777 ies->data, ies->len); 9778 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9779 ecsa = (void *)ecsa_elem->data; 9780 9781 if (csa && csa->count == 0) 9782 csa = NULL; 9783 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9784 csa = NULL; 9785 9786 if (ecsa && ecsa->count == 0) 9787 ecsa = NULL; 9788 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9789 ecsa = NULL; 9790 9791 if (ignore_ecsa && ecsa) { 9792 sdata_info(sdata, 9793 "Ignoring ECSA in probe response - was considered stuck!\n"); 9794 return csa; 9795 } 9796 9797 return csa || ecsa; 9798 } 9799 9800 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9801 struct cfg80211_bss *bss) 9802 { 9803 u8 cur_channel; 9804 bool ret; 9805 9806 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9807 9808 rcu_read_lock(); 9809 if (ieee80211_mgd_csa_present(sdata, 9810 rcu_dereference(bss->beacon_ies), 9811 cur_channel, false)) { 9812 ret = true; 9813 goto out; 9814 } 9815 9816 if (ieee80211_mgd_csa_present(sdata, 9817 rcu_dereference(bss->proberesp_ies), 9818 cur_channel, bss->proberesp_ecsa_stuck)) { 9819 ret = true; 9820 goto out; 9821 } 9822 9823 ret = false; 9824 out: 9825 rcu_read_unlock(); 9826 return ret; 9827 } 9828 9829 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9830 const u8 *supported_selectors, 9831 u8 supported_selectors_len) 9832 { 9833 if (supported_selectors) { 9834 for (int i = 0; i < supported_selectors_len; i++) { 9835 set_bit(supported_selectors[i], 9836 userspace_selectors); 9837 } 9838 } else { 9839 /* Assume SAE_H2E support for backward compatibility. */ 9840 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9841 userspace_selectors); 9842 } 9843 } 9844 9845 /* config hooks */ 9846 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9847 struct cfg80211_auth_request *req) 9848 { 9849 struct ieee80211_local *local = sdata->local; 9850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9851 struct ieee80211_mgd_auth_data *auth_data; 9852 struct ieee80211_conn_settings conn; 9853 struct ieee80211_link_data *link; 9854 struct ieee80211_supported_band *sband; 9855 struct ieee80211_bss *bss; 9856 u16 auth_alg; 9857 int err; 9858 bool cont_auth, wmm_used; 9859 9860 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9861 9862 /* prepare auth data structure */ 9863 9864 switch (req->auth_type) { 9865 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9866 auth_alg = WLAN_AUTH_OPEN; 9867 break; 9868 case NL80211_AUTHTYPE_SHARED_KEY: 9869 if (fips_enabled) 9870 return -EOPNOTSUPP; 9871 auth_alg = WLAN_AUTH_SHARED_KEY; 9872 break; 9873 case NL80211_AUTHTYPE_FT: 9874 auth_alg = WLAN_AUTH_FT; 9875 break; 9876 case NL80211_AUTHTYPE_NETWORK_EAP: 9877 auth_alg = WLAN_AUTH_LEAP; 9878 break; 9879 case NL80211_AUTHTYPE_SAE: 9880 auth_alg = WLAN_AUTH_SAE; 9881 break; 9882 case NL80211_AUTHTYPE_FILS_SK: 9883 auth_alg = WLAN_AUTH_FILS_SK; 9884 break; 9885 case NL80211_AUTHTYPE_FILS_SK_PFS: 9886 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9887 break; 9888 case NL80211_AUTHTYPE_FILS_PK: 9889 auth_alg = WLAN_AUTH_FILS_PK; 9890 break; 9891 case NL80211_AUTHTYPE_EPPKE: 9892 auth_alg = WLAN_AUTH_EPPKE; 9893 break; 9894 case NL80211_AUTHTYPE_IEEE8021X: 9895 auth_alg = WLAN_AUTH_IEEE8021X; 9896 break; 9897 default: 9898 return -EOPNOTSUPP; 9899 } 9900 9901 if (ifmgd->assoc_data) 9902 return -EBUSY; 9903 9904 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9905 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9906 return -EINVAL; 9907 } 9908 9909 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9910 req->ie_len, GFP_KERNEL); 9911 if (!auth_data) 9912 return -ENOMEM; 9913 9914 memcpy(auth_data->ap_addr, 9915 req->ap_mld_addr ?: req->bss->bssid, 9916 ETH_ALEN); 9917 auth_data->bss = req->bss; 9918 auth_data->link_id = req->link_id; 9919 9920 if (req->auth_data_len >= 4) { 9921 if (req->auth_type == NL80211_AUTHTYPE_SAE || 9922 req->auth_type == NL80211_AUTHTYPE_EPPKE || 9923 req->auth_type == NL80211_AUTHTYPE_IEEE8021X) { 9924 __le16 *pos = (__le16 *) req->auth_data; 9925 9926 auth_data->trans = le16_to_cpu(pos[0]); 9927 auth_data->status = le16_to_cpu(pos[1]); 9928 } 9929 9930 memcpy(auth_data->data, req->auth_data + 4, 9931 req->auth_data_len - 4); 9932 auth_data->data_len += req->auth_data_len - 4; 9933 } 9934 9935 /* Check if continuing authentication or trying to authenticate with the 9936 * same BSS that we were in the process of authenticating with and avoid 9937 * removal and re-addition of the STA entry in 9938 * ieee80211_prep_connection(). 9939 */ 9940 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9941 ifmgd->auth_data->link_id == req->link_id; 9942 9943 if (req->ie && req->ie_len) { 9944 memcpy(&auth_data->data[auth_data->data_len], 9945 req->ie, req->ie_len); 9946 auth_data->data_len += req->ie_len; 9947 } 9948 9949 if (req->key && req->key_len) { 9950 auth_data->key_len = req->key_len; 9951 auth_data->key_idx = req->key_idx; 9952 memcpy(auth_data->key, req->key, req->key_len); 9953 } 9954 9955 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9956 req->supported_selectors, 9957 req->supported_selectors_len); 9958 9959 auth_data->algorithm = auth_alg; 9960 9961 /* try to authenticate/probe */ 9962 9963 if (ifmgd->auth_data) { 9964 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9965 auth_data->peer_confirmed = 9966 ifmgd->auth_data->peer_confirmed; 9967 } 9968 ieee80211_destroy_auth_data(sdata, cont_auth); 9969 } 9970 9971 /* prep auth_data so we don't go into idle on disassoc */ 9972 ifmgd->auth_data = auth_data; 9973 9974 /* If this is continuation of an ongoing SAE authentication exchange 9975 * (i.e., request to send SAE Confirm) and the peer has already 9976 * confirmed, mark authentication completed since we are about to send 9977 * out SAE Confirm. 9978 */ 9979 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9980 auth_data->peer_confirmed && auth_data->trans == 2) 9981 ieee80211_mark_sta_auth(sdata); 9982 9983 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_EPPKE && 9984 auth_data->trans == 3) 9985 ieee80211_mark_sta_auth(sdata); 9986 9987 if (ifmgd->associated) { 9988 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9989 9990 sdata_info(sdata, 9991 "disconnect from AP %pM for new auth to %pM\n", 9992 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9993 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9994 WLAN_REASON_UNSPECIFIED, 9995 false, frame_buf); 9996 9997 ieee80211_report_disconnect(sdata, frame_buf, 9998 sizeof(frame_buf), true, 9999 WLAN_REASON_UNSPECIFIED, 10000 false); 10001 } 10002 10003 /* needed for transmitting the auth frame(s) properly */ 10004 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 10005 10006 bss = (void *)req->bss->priv; 10007 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 10008 10009 sband = local->hw.wiphy->bands[req->bss->channel->band]; 10010 10011 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 10012 &conn); 10013 10014 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 10015 req->ap_mld_addr, cont_auth, 10016 &conn, false, 10017 auth_data->userspace_selectors); 10018 if (err) 10019 goto err_clear; 10020 10021 if (req->link_id >= 0) 10022 link = sdata_dereference(sdata->link[req->link_id], sdata); 10023 else 10024 link = &sdata->deflink; 10025 10026 if (WARN_ON(!link)) { 10027 err = -ENOLINK; 10028 goto err_clear; 10029 } 10030 10031 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 10032 auth_data->ap_addr, link->conf->addr); 10033 10034 err = ieee80211_auth(sdata); 10035 if (err) { 10036 sta_info_destroy_addr(sdata, auth_data->ap_addr); 10037 goto err_clear; 10038 } 10039 10040 /* hold our own reference */ 10041 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 10042 return 0; 10043 10044 err_clear: 10045 if (!ieee80211_vif_is_mld(&sdata->vif)) { 10046 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10047 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10048 BSS_CHANGED_BSSID); 10049 ieee80211_link_release_channel(&sdata->deflink); 10050 } 10051 ifmgd->auth_data = NULL; 10052 kfree(auth_data); 10053 return err; 10054 } 10055 10056 static void 10057 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 10058 struct ieee80211_mgd_assoc_data *assoc_data, 10059 struct cfg80211_assoc_request *req, 10060 struct ieee80211_conn_settings *conn, 10061 unsigned int link_id) 10062 { 10063 struct ieee80211_local *local = sdata->local; 10064 const struct cfg80211_bss_ies *bss_ies; 10065 struct ieee80211_supported_band *sband; 10066 struct ieee80211_link_data *link; 10067 struct cfg80211_bss *cbss; 10068 struct ieee80211_bss *bss; 10069 10070 cbss = assoc_data->link[link_id].bss; 10071 if (WARN_ON(!cbss)) 10072 return; 10073 10074 bss = (void *)cbss->priv; 10075 10076 sband = local->hw.wiphy->bands[cbss->channel->band]; 10077 if (WARN_ON(!sband)) 10078 return; 10079 10080 link = sdata_dereference(sdata->link[link_id], sdata); 10081 if (WARN_ON(!link)) 10082 return; 10083 10084 /* for MLO connections assume advertising all rates is OK */ 10085 if (!req->ap_mld_addr) { 10086 assoc_data->supp_rates = bss->supp_rates; 10087 assoc_data->supp_rates_len = bss->supp_rates_len; 10088 } 10089 10090 /* copy and link elems for the STA profile */ 10091 if (req->links[link_id].elems_len) { 10092 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 10093 req->links[link_id].elems_len); 10094 assoc_data->link[link_id].elems = assoc_data->ie_pos; 10095 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 10096 assoc_data->ie_pos += req->links[link_id].elems_len; 10097 } 10098 10099 link->u.mgd.beacon_crc_valid = false; 10100 link->u.mgd.dtim_period = 0; 10101 link->u.mgd.have_beacon = false; 10102 10103 /* override HT configuration only if the AP and we support it */ 10104 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 10105 struct ieee80211_sta_ht_cap sta_ht_cap; 10106 10107 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 10108 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 10109 } 10110 10111 rcu_read_lock(); 10112 bss_ies = rcu_dereference(cbss->beacon_ies); 10113 if (bss_ies) { 10114 u8 dtim_count = 0; 10115 10116 ieee80211_get_dtim(bss_ies, &dtim_count, 10117 &link->u.mgd.dtim_period); 10118 10119 sdata->deflink.u.mgd.have_beacon = true; 10120 10121 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 10122 link->conf->sync_tsf = bss_ies->tsf; 10123 link->conf->sync_device_ts = bss->device_ts_beacon; 10124 link->conf->sync_dtim_count = dtim_count; 10125 } 10126 } else { 10127 bss_ies = rcu_dereference(cbss->ies); 10128 } 10129 10130 if (bss_ies) { 10131 const struct element *elem; 10132 10133 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 10134 bss_ies->data, bss_ies->len); 10135 if (elem && elem->datalen >= 3) 10136 link->conf->profile_periodicity = elem->data[2]; 10137 else 10138 link->conf->profile_periodicity = 0; 10139 10140 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 10141 bss_ies->data, bss_ies->len); 10142 if (elem && elem->datalen >= 11 && 10143 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 10144 link->conf->ema_ap = true; 10145 else 10146 link->conf->ema_ap = false; 10147 } 10148 rcu_read_unlock(); 10149 10150 if (bss->corrupt_data) { 10151 char *corrupt_type = "data"; 10152 10153 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 10154 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 10155 corrupt_type = "beacon and probe response"; 10156 else 10157 corrupt_type = "beacon"; 10158 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 10159 corrupt_type = "probe response"; 10160 } 10161 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 10162 cbss->bssid, corrupt_type); 10163 } 10164 10165 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 10166 if (sdata->u.mgd.powersave) 10167 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 10168 else 10169 link->smps_mode = IEEE80211_SMPS_OFF; 10170 } else { 10171 link->smps_mode = link->u.mgd.req_smps; 10172 } 10173 } 10174 10175 static int 10176 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 10177 struct ieee80211_mgd_assoc_data *assoc_data, 10178 int link_id) 10179 { 10180 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 10181 enum nl80211_band band = cbss->channel->band; 10182 struct ieee80211_supported_band *sband; 10183 const struct element *elem; 10184 int err; 10185 10186 /* neither HT nor VHT elements used on 6 GHz */ 10187 if (band == NL80211_BAND_6GHZ) 10188 return 0; 10189 10190 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 10191 return 0; 10192 10193 rcu_read_lock(); 10194 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 10195 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 10196 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 10197 cbss->bssid); 10198 err = -EINVAL; 10199 goto out_rcu; 10200 } 10201 assoc_data->link[link_id].ap_ht_param = 10202 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 10203 rcu_read_unlock(); 10204 10205 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 10206 return 0; 10207 10208 /* some drivers want to support VHT on 2.4 GHz even */ 10209 sband = sdata->local->hw.wiphy->bands[band]; 10210 if (!sband->vht_cap.vht_supported) 10211 return 0; 10212 10213 rcu_read_lock(); 10214 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 10215 /* but even then accept it not being present on the AP */ 10216 if (!elem && band == NL80211_BAND_2GHZ) { 10217 err = 0; 10218 goto out_rcu; 10219 } 10220 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 10221 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 10222 cbss->bssid); 10223 err = -EINVAL; 10224 goto out_rcu; 10225 } 10226 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 10227 sizeof(struct ieee80211_vht_cap)); 10228 rcu_read_unlock(); 10229 10230 return 0; 10231 out_rcu: 10232 rcu_read_unlock(); 10233 return err; 10234 } 10235 10236 static bool 10237 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 10238 { 10239 const struct cfg80211_bss_ies *ies; 10240 struct cfg80211_bss *bss; 10241 const struct element *ml; 10242 10243 /* not an MLO connection if link_id < 0, so irrelevant */ 10244 if (req->link_id < 0) 10245 return false; 10246 10247 bss = req->links[req->link_id].bss; 10248 10249 guard(rcu)(); 10250 ies = rcu_dereference(bss->ies); 10251 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 10252 ies->data, ies->len) { 10253 const struct ieee80211_multi_link_elem *mle; 10254 10255 if (!ieee80211_mle_type_ok(ml->data + 1, 10256 IEEE80211_ML_CONTROL_TYPE_BASIC, 10257 ml->datalen - 1)) 10258 continue; 10259 10260 mle = (void *)(ml->data + 1); 10261 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 10262 return true; 10263 } 10264 10265 return false; 10266 10267 } 10268 10269 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 10270 struct cfg80211_assoc_request *req) 10271 { 10272 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 10273 struct ieee80211_local *local = sdata->local; 10274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10275 struct ieee80211_mgd_assoc_data *assoc_data; 10276 const struct element *ssid_elem; 10277 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 10278 const struct wiphy_iftype_ext_capab *ift_ext_capa; 10279 struct ieee80211_link_data *link; 10280 u16 driver_ext_mld_capa_ops = 0; 10281 struct cfg80211_bss *cbss; 10282 bool override, uapsd_supported; 10283 bool match_auth; 10284 int i, err; 10285 size_t size = sizeof(*assoc_data) + req->ie_len; 10286 10287 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 10288 size += req->links[i].elems_len; 10289 10290 assoc_data = kzalloc(size, GFP_KERNEL); 10291 if (!assoc_data) 10292 return -ENOMEM; 10293 10294 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 10295 10296 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 10297 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 10298 err = -EINVAL; 10299 goto err_free; 10300 } 10301 10302 rcu_read_lock(); 10303 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 10304 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 10305 rcu_read_unlock(); 10306 err = -EINVAL; 10307 goto err_free; 10308 } 10309 10310 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 10311 assoc_data->ssid_len = ssid_elem->datalen; 10312 rcu_read_unlock(); 10313 10314 if (req->ap_mld_addr) 10315 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 10316 else 10317 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 10318 10319 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10320 ieee80211_vif_type_p2p(&sdata->vif)); 10321 if (ift_ext_capa) 10322 driver_ext_mld_capa_ops = ift_ext_capa->ext_mld_capa_and_ops; 10323 10324 /* 10325 * Many APs have broken parsing of the extended MLD capa/ops field, 10326 * dropping (re-)association request frames or replying with association 10327 * response with a failure status if it's present. 10328 * Set our value from the userspace request only in strict mode or if 10329 * the AP also had that field present. 10330 * For UHR we may want to advertise ML-PM (per driver_ext_mld_capa_ops) 10331 * but if the AP doesn't have it then it's pointless, and if it does 10332 * then it has to have the extended MLD capa/ops field. 10333 */ 10334 if (ieee80211_hw_check(&local->hw, STRICT) || 10335 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 10336 assoc_data->ext_mld_capa_ops = 10337 cpu_to_le16(req->ext_mld_capa_ops | 10338 driver_ext_mld_capa_ops); 10339 10340 if (ifmgd->associated) { 10341 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10342 10343 sdata_info(sdata, 10344 "disconnect from AP %pM for new assoc to %pM\n", 10345 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 10346 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10347 WLAN_REASON_UNSPECIFIED, 10348 false, frame_buf); 10349 10350 ieee80211_report_disconnect(sdata, frame_buf, 10351 sizeof(frame_buf), true, 10352 WLAN_REASON_UNSPECIFIED, 10353 false); 10354 } 10355 10356 memset(sdata->u.mgd.userspace_selectors, 0, 10357 sizeof(sdata->u.mgd.userspace_selectors)); 10358 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 10359 req->supported_selectors, 10360 req->supported_selectors_len); 10361 10362 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 10363 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 10364 sizeof(ifmgd->ht_capa_mask)); 10365 10366 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 10367 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 10368 sizeof(ifmgd->vht_capa_mask)); 10369 10370 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 10371 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 10372 sizeof(ifmgd->s1g_capa_mask)); 10373 10374 /* keep some setup (AP STA, channel, ...) if matching */ 10375 match_auth = ifmgd->auth_data && 10376 ether_addr_equal(ifmgd->auth_data->ap_addr, 10377 assoc_data->ap_addr) && 10378 ifmgd->auth_data->link_id == req->link_id; 10379 10380 if (req->ap_mld_addr) { 10381 uapsd_supported = true; 10382 10383 if (req->flags & (ASSOC_REQ_DISABLE_HT | 10384 ASSOC_REQ_DISABLE_VHT | 10385 ASSOC_REQ_DISABLE_HE | 10386 ASSOC_REQ_DISABLE_EHT)) { 10387 err = -EINVAL; 10388 goto err_free; 10389 } 10390 10391 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 10392 struct ieee80211_supported_band *sband; 10393 struct cfg80211_bss *link_cbss = req->links[i].bss; 10394 struct ieee80211_bss *bss; 10395 10396 if (!link_cbss) 10397 continue; 10398 10399 bss = (void *)link_cbss->priv; 10400 10401 if (!bss->wmm_used) { 10402 err = -EINVAL; 10403 req->links[i].error = err; 10404 goto err_free; 10405 } 10406 10407 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10408 err = -EINVAL; 10409 req->links[i].error = err; 10410 goto err_free; 10411 } 10412 10413 link = sdata_dereference(sdata->link[i], sdata); 10414 if (link) 10415 ether_addr_copy(assoc_data->link[i].addr, 10416 link->conf->addr); 10417 else 10418 eth_random_addr(assoc_data->link[i].addr); 10419 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 10420 10421 if (match_auth && i == assoc_link_id && link) 10422 assoc_data->link[i].conn = link->u.mgd.conn; 10423 else 10424 assoc_data->link[i].conn = 10425 ieee80211_conn_settings_unlimited; 10426 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 10427 req, true, i, 10428 &assoc_data->link[i].conn); 10429 assoc_data->link[i].bss = link_cbss; 10430 10431 if (!bss->uapsd_supported) 10432 uapsd_supported = false; 10433 10434 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 10435 err = -EINVAL; 10436 req->links[i].error = err; 10437 goto err_free; 10438 } 10439 10440 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 10441 assoc_data, i); 10442 if (err) { 10443 err = -EINVAL; 10444 req->links[i].error = err; 10445 goto err_free; 10446 } 10447 } 10448 10449 assoc_data->wmm = true; 10450 } else { 10451 struct ieee80211_supported_band *sband; 10452 struct ieee80211_bss *bss = (void *)cbss->priv; 10453 10454 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 10455 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 10456 10457 assoc_data->wmm = bss->wmm_used && 10458 (local->hw.queues >= IEEE80211_NUM_ACS); 10459 10460 if (cbss->channel->band == NL80211_BAND_6GHZ && 10461 req->flags & (ASSOC_REQ_DISABLE_HT | 10462 ASSOC_REQ_DISABLE_VHT | 10463 ASSOC_REQ_DISABLE_HE)) { 10464 err = -EINVAL; 10465 goto err_free; 10466 } 10467 10468 sband = local->hw.wiphy->bands[cbss->channel->band]; 10469 10470 assoc_data->link[0].bss = cbss; 10471 10472 if (match_auth) 10473 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 10474 else 10475 assoc_data->link[0].conn = 10476 ieee80211_conn_settings_unlimited; 10477 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 10478 assoc_data->wmm, 0, 10479 &assoc_data->link[0].conn); 10480 10481 uapsd_supported = bss->uapsd_supported; 10482 10483 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 10484 if (err) 10485 goto err_free; 10486 } 10487 10488 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 10489 10490 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 10491 err = -EBUSY; 10492 goto err_free; 10493 } 10494 10495 if (ifmgd->assoc_data) { 10496 err = -EBUSY; 10497 goto err_free; 10498 } 10499 10500 /* Cleanup is delayed if auth_data matches */ 10501 if (ifmgd->auth_data && !match_auth) 10502 ieee80211_destroy_auth_data(sdata, false); 10503 10504 if (req->ie && req->ie_len) { 10505 memcpy(assoc_data->ie, req->ie, req->ie_len); 10506 assoc_data->ie_len = req->ie_len; 10507 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 10508 } else { 10509 assoc_data->ie_pos = assoc_data->ie; 10510 } 10511 10512 if (req->fils_kek) { 10513 /* should already be checked in cfg80211 - so warn */ 10514 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 10515 err = -EINVAL; 10516 goto err_free; 10517 } 10518 memcpy(assoc_data->fils_kek, req->fils_kek, 10519 req->fils_kek_len); 10520 assoc_data->fils_kek_len = req->fils_kek_len; 10521 } 10522 10523 if (req->fils_nonces) 10524 memcpy(assoc_data->fils_nonces, req->fils_nonces, 10525 2 * FILS_NONCE_LEN); 10526 10527 /* default timeout */ 10528 assoc_data->timeout = jiffies; 10529 assoc_data->timeout_started = true; 10530 10531 assoc_data->assoc_link_id = assoc_link_id; 10532 10533 if (req->ap_mld_addr) { 10534 /* if there was no authentication, set up the link */ 10535 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 10536 if (err) 10537 goto err_clear; 10538 } 10539 10540 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 10541 if (WARN_ON(!link)) { 10542 err = -EINVAL; 10543 goto err_clear; 10544 } 10545 10546 override = link->u.mgd.conn.mode != 10547 assoc_data->link[assoc_link_id].conn.mode || 10548 link->u.mgd.conn.bw_limit != 10549 assoc_data->link[assoc_link_id].conn.bw_limit; 10550 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 10551 10552 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 10553 assoc_link_id); 10554 10555 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 10556 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 10557 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 10558 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 10559 10560 if (assoc_data->wmm && uapsd_supported && 10561 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 10562 assoc_data->uapsd = true; 10563 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 10564 } else { 10565 assoc_data->uapsd = false; 10566 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 10567 } 10568 10569 if (req->prev_bssid) 10570 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 10571 10572 if (req->use_mfp) { 10573 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 10574 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 10575 } else { 10576 ifmgd->mfp = IEEE80211_MFP_DISABLED; 10577 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 10578 } 10579 10580 if (req->flags & ASSOC_REQ_USE_RRM) 10581 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 10582 else 10583 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 10584 10585 if (req->crypto.control_port) 10586 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 10587 else 10588 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 10589 10590 sdata->control_port_protocol = req->crypto.control_port_ethertype; 10591 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 10592 sdata->control_port_over_nl80211 = 10593 req->crypto.control_port_over_nl80211; 10594 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 10595 10596 /* kick off associate process */ 10597 ifmgd->assoc_data = assoc_data; 10598 10599 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 10600 if (!assoc_data->link[i].bss) 10601 continue; 10602 if (i == assoc_data->assoc_link_id) 10603 continue; 10604 /* only calculate the mode, hence link/link_sta == NULL */ 10605 err = ieee80211_prep_channel(sdata, NULL, NULL, i, 10606 assoc_data->link[i].bss, true, 10607 &assoc_data->link[i].conn, 10608 sdata->u.mgd.userspace_selectors); 10609 if (err) { 10610 req->links[i].error = err; 10611 goto err_clear; 10612 } 10613 } 10614 10615 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 10616 vif_cfg->ssid_len = assoc_data->ssid_len; 10617 10618 /* needed for transmitting the assoc frames properly */ 10619 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 10620 10621 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 10622 req->ap_mld_addr, true, 10623 &assoc_data->link[assoc_link_id].conn, 10624 override, 10625 sdata->u.mgd.userspace_selectors); 10626 if (err) 10627 goto err_clear; 10628 10629 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 10630 const struct cfg80211_bss_ies *beacon_ies; 10631 10632 rcu_read_lock(); 10633 beacon_ies = rcu_dereference(req->bss->beacon_ies); 10634 if (!beacon_ies) { 10635 /* 10636 * Wait up to one beacon interval ... 10637 * should this be more if we miss one? 10638 */ 10639 sdata_info(sdata, "waiting for beacon from %pM\n", 10640 link->u.mgd.bssid); 10641 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 10642 assoc_data->timeout_started = true; 10643 assoc_data->need_beacon = true; 10644 } 10645 rcu_read_unlock(); 10646 } 10647 10648 run_again(sdata, assoc_data->timeout); 10649 10650 /* We are associating, clean up auth_data */ 10651 if (ifmgd->auth_data) 10652 ieee80211_destroy_auth_data(sdata, true); 10653 10654 return 0; 10655 err_clear: 10656 if (!ifmgd->auth_data) { 10657 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10658 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10659 BSS_CHANGED_BSSID); 10660 } 10661 ifmgd->assoc_data = NULL; 10662 err_free: 10663 kfree(assoc_data); 10664 return err; 10665 } 10666 10667 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10668 struct cfg80211_deauth_request *req) 10669 { 10670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10671 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10672 bool tx = !req->local_state_change; 10673 struct ieee80211_prep_tx_info info = { 10674 .subtype = IEEE80211_STYPE_DEAUTH, 10675 }; 10676 10677 if (ifmgd->auth_data && 10678 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10679 sdata_info(sdata, 10680 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10681 req->bssid, req->reason_code, 10682 ieee80211_get_reason_code_string(req->reason_code)); 10683 10684 info.link_id = ifmgd->auth_data->link_id; 10685 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10686 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10687 IEEE80211_STYPE_DEAUTH, 10688 req->reason_code, tx, 10689 frame_buf); 10690 ieee80211_destroy_auth_data(sdata, false); 10691 ieee80211_report_disconnect(sdata, frame_buf, 10692 sizeof(frame_buf), true, 10693 req->reason_code, false); 10694 drv_mgd_complete_tx(sdata->local, sdata, &info); 10695 return 0; 10696 } 10697 10698 if (ifmgd->assoc_data && 10699 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10700 sdata_info(sdata, 10701 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10702 req->bssid, req->reason_code, 10703 ieee80211_get_reason_code_string(req->reason_code)); 10704 10705 info.link_id = ifmgd->assoc_data->assoc_link_id; 10706 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10707 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10708 IEEE80211_STYPE_DEAUTH, 10709 req->reason_code, tx, 10710 frame_buf); 10711 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10712 ieee80211_report_disconnect(sdata, frame_buf, 10713 sizeof(frame_buf), true, 10714 req->reason_code, false); 10715 drv_mgd_complete_tx(sdata->local, sdata, &info); 10716 return 0; 10717 } 10718 10719 if (ifmgd->associated && 10720 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10721 sdata_info(sdata, 10722 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10723 req->bssid, req->reason_code, 10724 ieee80211_get_reason_code_string(req->reason_code)); 10725 10726 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10727 req->reason_code, tx, frame_buf); 10728 ieee80211_report_disconnect(sdata, frame_buf, 10729 sizeof(frame_buf), true, 10730 req->reason_code, false); 10731 return 0; 10732 } 10733 10734 return -ENOTCONN; 10735 } 10736 10737 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10738 struct cfg80211_disassoc_request *req) 10739 { 10740 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10741 10742 if (!sdata->u.mgd.associated || 10743 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10744 return -ENOTCONN; 10745 10746 sdata_info(sdata, 10747 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10748 req->ap_addr, req->reason_code, 10749 ieee80211_get_reason_code_string(req->reason_code)); 10750 10751 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10752 req->reason_code, !req->local_state_change, 10753 frame_buf); 10754 10755 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10756 req->reason_code, false); 10757 10758 return 0; 10759 } 10760 10761 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10762 { 10763 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10764 &link->u.mgd.request_smps_work); 10765 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10766 &link->u.mgd.recalc_smps); 10767 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10768 &link->u.mgd.csa.switch_work); 10769 } 10770 10771 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10772 { 10773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10774 10775 /* 10776 * Make sure some work items will not run after this, 10777 * they will not do anything but might not have been 10778 * cancelled when disconnecting. 10779 */ 10780 wiphy_work_cancel(sdata->local->hw.wiphy, 10781 &ifmgd->monitor_work); 10782 wiphy_work_cancel(sdata->local->hw.wiphy, 10783 &ifmgd->beacon_connection_loss_work); 10784 wiphy_work_cancel(sdata->local->hw.wiphy, 10785 &ifmgd->csa_connection_drop_work); 10786 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10787 &ifmgd->tdls_peer_del_work); 10788 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 10789 &ifmgd->uhr_omp.status_work); 10790 10791 if (ifmgd->assoc_data) 10792 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10793 if (ifmgd->auth_data) 10794 ieee80211_destroy_auth_data(sdata, false); 10795 spin_lock_bh(&ifmgd->teardown_lock); 10796 if (ifmgd->teardown_skb) { 10797 kfree_skb(ifmgd->teardown_skb); 10798 ifmgd->teardown_skb = NULL; 10799 ifmgd->orig_teardown_skb = NULL; 10800 } 10801 kfree(ifmgd->assoc_req_ies); 10802 ifmgd->assoc_req_ies = NULL; 10803 ifmgd->assoc_req_ies_len = 0; 10804 spin_unlock_bh(&ifmgd->teardown_lock); 10805 timer_delete_sync(&ifmgd->timer); 10806 } 10807 10808 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10809 enum nl80211_cqm_rssi_threshold_event rssi_event, 10810 s32 rssi_level, 10811 gfp_t gfp) 10812 { 10813 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10814 10815 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10816 10817 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10818 } 10819 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10820 10821 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10822 { 10823 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10824 10825 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10826 10827 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10828 } 10829 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10830 10831 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10832 int rssi_min_thold, 10833 int rssi_max_thold) 10834 { 10835 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10836 10837 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10838 return; 10839 10840 /* 10841 * Scale up threshold values before storing it, as the RSSI averaging 10842 * algorithm uses a scaled up value as well. Change this scaling 10843 * factor if the RSSI averaging algorithm changes. 10844 */ 10845 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10846 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10847 } 10848 10849 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10850 int rssi_min_thold, 10851 int rssi_max_thold) 10852 { 10853 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10854 10855 WARN_ON(rssi_min_thold == rssi_max_thold || 10856 rssi_min_thold > rssi_max_thold); 10857 10858 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10859 rssi_max_thold); 10860 } 10861 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10862 10863 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10864 { 10865 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10866 10867 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10868 } 10869 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10870 10871 static void 10872 ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10873 struct ieee80211_mgmt *mgmt, size_t len) 10874 { 10875 struct ieee80211_local *local = sdata->local; 10876 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10877 struct ieee80211_mgd_assoc_data *add_links_data = 10878 ifmgd->reconf.add_links_data; 10879 struct sta_info *sta; 10880 struct cfg80211_mlo_reconf_done_data done_data = {}; 10881 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10882 sdata->u.mgd.reconf.removed_links; 10883 u16 link_mask, valid_links; 10884 unsigned int link_id; 10885 size_t orig_len = len; 10886 u8 i, group_key_data_len; 10887 u8 *pos; 10888 10889 if (!ieee80211_vif_is_mld(&sdata->vif) || 10890 len < IEEE80211_MIN_ACTION_SIZE(ml_reconf_resp) || 10891 mgmt->u.action.ml_reconf_resp.dialog_token != 10892 sdata->u.mgd.reconf.dialog_token || 10893 !sta_changed_links) 10894 return; 10895 10896 pos = mgmt->u.action.ml_reconf_resp.variable; 10897 len -= offsetofend(typeof(*mgmt), u.action.ml_reconf_resp); 10898 10899 if (len < mgmt->u.action.ml_reconf_resp.count * 10900 sizeof(struct ieee80211_ml_reconf_status)) { 10901 sdata_info(sdata, 10902 "mlo: reconf: unexpected len=%zu, count=%u\n", 10903 len, mgmt->u.action.ml_reconf_resp.count); 10904 goto disconnect; 10905 } 10906 10907 link_mask = sta_changed_links; 10908 for (i = 0; i < mgmt->u.action.ml_reconf_resp.count; i++) { 10909 struct ieee80211_ml_reconf_status *reconf_status = (void *)pos; 10910 u16 status = le16_to_cpu(reconf_status->status); 10911 10912 link_id = u8_get_bits(reconf_status->info, 10913 IEEE80211_ML_RECONF_LINK_ID_MASK); 10914 10915 if (!(link_mask & BIT(link_id))) { 10916 sdata_info(sdata, 10917 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10918 link_id, sta_changed_links); 10919 goto disconnect; 10920 } 10921 10922 /* clear the corresponding link, to detect the case that 10923 * the same link was included more than one time 10924 */ 10925 link_mask &= ~BIT(link_id); 10926 10927 /* Handle failure to remove links here. Failure to remove added 10928 * links will be done later in the flow. 10929 */ 10930 if (status != WLAN_STATUS_SUCCESS) { 10931 sdata_info(sdata, 10932 "mlo: reconf: failed on link=%u, status=%u\n", 10933 link_id, status); 10934 10935 /* The AP MLD failed to remove a link that was already 10936 * removed locally. As this is not expected behavior, 10937 * disconnect 10938 */ 10939 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10940 goto disconnect; 10941 10942 /* The AP MLD failed to add a link. Remove it from the 10943 * added links. 10944 */ 10945 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10946 } 10947 10948 pos += sizeof(*reconf_status); 10949 len -= sizeof(*reconf_status); 10950 } 10951 10952 if (link_mask) { 10953 sdata_info(sdata, 10954 "mlo: reconf: no response for links=0x%x\n", 10955 link_mask); 10956 goto disconnect; 10957 } 10958 10959 if (!sdata->u.mgd.reconf.added_links) 10960 goto out; 10961 10962 if (len < 1 || len < 1 + *pos) { 10963 sdata_info(sdata, 10964 "mlo: reconf: invalid group key data length"); 10965 goto disconnect; 10966 } 10967 10968 /* The Group Key Data field must be present when links are added. This 10969 * field should be processed by userland. 10970 */ 10971 group_key_data_len = *pos++; 10972 10973 pos += group_key_data_len; 10974 len -= group_key_data_len + 1; 10975 10976 /* Process the information for the added links */ 10977 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10978 if (WARN_ON(!sta)) 10979 goto disconnect; 10980 10981 valid_links = sdata->vif.valid_links; 10982 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10983 if (!add_links_data->link[link_id].bss || 10984 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10985 continue; 10986 10987 valid_links |= BIT(link_id); 10988 if (ieee80211_sta_allocate_link(sta, link_id)) 10989 goto disconnect; 10990 } 10991 10992 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10993 link_mask = 0; 10994 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10995 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10996 struct ieee80211_link_data *link; 10997 struct link_sta_info *link_sta; 10998 u64 changed = 0; 10999 11000 if (!cbss) 11001 continue; 11002 11003 link = sdata_dereference(sdata->link[link_id], sdata); 11004 if (WARN_ON(!link)) 11005 goto disconnect; 11006 11007 link_info(link, 11008 "mlo: reconf: local address %pM, AP link address %pM\n", 11009 add_links_data->link[link_id].addr, 11010 add_links_data->link[link_id].bss->bssid); 11011 11012 link_sta = rcu_dereference_protected(sta->link[link_id], 11013 lockdep_is_held(&local->hw.wiphy->mtx)); 11014 if (WARN_ON(!link_sta)) 11015 goto disconnect; 11016 11017 if (!link->u.mgd.have_beacon) { 11018 const struct cfg80211_bss_ies *ies; 11019 11020 rcu_read_lock(); 11021 ies = rcu_dereference(cbss->beacon_ies); 11022 if (ies) 11023 link->u.mgd.have_beacon = true; 11024 else 11025 ies = rcu_dereference(cbss->ies); 11026 ieee80211_get_dtim(ies, 11027 &link->conf->sync_dtim_count, 11028 &link->u.mgd.dtim_period); 11029 link->conf->beacon_int = cbss->beacon_interval; 11030 rcu_read_unlock(); 11031 } 11032 11033 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 11034 11035 link->u.mgd.conn = add_links_data->link[link_id].conn; 11036 if (ieee80211_prep_channel(sdata, link, link_sta, link_id, cbss, 11037 true, &link->u.mgd.conn, 11038 sdata->u.mgd.userspace_selectors)) { 11039 link_info(link, "mlo: reconf: prep_channel failed\n"); 11040 goto disconnect; 11041 } 11042 11043 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 11044 add_links_data->link[link_id].bss)) 11045 goto disconnect; 11046 11047 if (!ieee80211_assoc_config_link(link, link_sta, 11048 add_links_data->link[link_id].bss, 11049 mgmt, pos, len, 11050 &changed)) 11051 goto disconnect; 11052 11053 /* The AP MLD indicated success for this link, but the station 11054 * profile status indicated otherwise. Since there is an 11055 * inconsistency in the ML reconfiguration response, disconnect 11056 */ 11057 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 11058 goto disconnect; 11059 11060 if (ieee80211_sta_activate_link(sta, link_id)) 11061 goto disconnect; 11062 11063 changed |= ieee80211_link_set_associated(link, cbss); 11064 ieee80211_link_info_change_notify(sdata, link, changed); 11065 11066 ieee80211_recalc_smps(sdata, link); 11067 link_mask |= BIT(link_id); 11068 } 11069 11070 sdata_info(sdata, 11071 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 11072 valid_links, link_mask); 11073 11074 /* links might have changed due to rejected ones, set them again */ 11075 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 11076 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 11077 11078 ieee80211_recalc_ps(local); 11079 ieee80211_recalc_ps_vif(sdata); 11080 11081 ieee80211_send_uhr_omp_req_dbe(sdata, link_mask, true); 11082 11083 done_data.buf = (const u8 *)mgmt; 11084 done_data.len = orig_len; 11085 done_data.added_links = link_mask; 11086 11087 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 11088 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 11089 done_data.links[link_id].addr = 11090 add_links_data->link[link_id].addr; 11091 } 11092 11093 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 11094 kfree(sdata->u.mgd.reconf.add_links_data); 11095 sdata->u.mgd.reconf.add_links_data = NULL; 11096 out: 11097 ieee80211_ml_reconf_reset(sdata); 11098 return; 11099 11100 disconnect: 11101 __ieee80211_disconnect(sdata); 11102 } 11103 11104 static struct sk_buff * 11105 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 11106 struct ieee80211_mgd_assoc_data *add_links_data, 11107 u16 removed_links, __le16 ext_mld_capa_ops) 11108 { 11109 struct ieee80211_local *local = sdata->local; 11110 struct ieee80211_mgmt *mgmt; 11111 struct ieee80211_multi_link_elem *ml_elem; 11112 struct ieee80211_mle_basic_common_info *common; 11113 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 11114 struct sk_buff *skb; 11115 size_t size; 11116 unsigned int link_id; 11117 __le16 eml_capa = 0, mld_capa_ops = 0; 11118 struct ieee80211_tx_info *info; 11119 u8 common_size, var_common_size; 11120 u8 *ml_elem_len; 11121 u16 capab = 0; 11122 11123 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 11124 11125 /* Consider the maximal length of the reconfiguration ML element */ 11126 size += sizeof(struct ieee80211_multi_link_elem); 11127 11128 /* The Basic ML element and the Reconfiguration ML element have the same 11129 * fixed common information fields in the context of ML reconfiguration 11130 * action frame. The AP MLD MAC address must always be present 11131 */ 11132 common_size = sizeof(*common); 11133 11134 /* when adding links, the MLD capabilities must be present */ 11135 var_common_size = 0; 11136 if (add_links_data) { 11137 const struct wiphy_iftype_ext_capab *ift_ext_capa = 11138 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 11139 ieee80211_vif_type_p2p(&sdata->vif)); 11140 11141 if (ift_ext_capa) { 11142 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 11143 mld_capa_ops = 11144 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 11145 } 11146 11147 /* MLD capabilities and operation */ 11148 var_common_size += 2; 11149 11150 /* EML capabilities */ 11151 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 11152 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 11153 var_common_size += 2; 11154 } 11155 11156 if (ext_mld_capa_ops) 11157 var_common_size += 2; 11158 11159 /* Add the common information length */ 11160 size += common_size + var_common_size; 11161 11162 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 11163 struct cfg80211_bss *cbss; 11164 size_t elems_len; 11165 11166 if (removed_links & BIT(link_id)) { 11167 size += sizeof(struct ieee80211_mle_per_sta_profile) + 11168 ETH_ALEN; 11169 continue; 11170 } 11171 11172 if (!add_links_data || !add_links_data->link[link_id].bss) 11173 continue; 11174 11175 elems_len = add_links_data->link[link_id].elems_len; 11176 cbss = add_links_data->link[link_id].bss; 11177 11178 /* should be the same across all BSSes */ 11179 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 11180 capab |= WLAN_CAPABILITY_PRIVACY; 11181 11182 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 11183 ETH_ALEN; 11184 11185 /* WMM */ 11186 size += 9; 11187 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 11188 elems_len); 11189 } 11190 11191 skb = alloc_skb(size, GFP_KERNEL); 11192 if (!skb) 11193 return NULL; 11194 11195 skb_reserve(skb, local->hw.extra_tx_headroom); 11196 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ml_reconf_req)); 11197 11198 /* Add the MAC header */ 11199 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11200 IEEE80211_STYPE_ACTION); 11201 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11202 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11203 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11204 11205 /* Add the action frame fixed fields */ 11206 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11207 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 11208 11209 /* allocate a dialog token and store it */ 11210 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 11211 mgmt->u.action.ml_reconf_req.dialog_token = 11212 sdata->u.mgd.reconf.dialog_token; 11213 11214 /* Add the ML reconfiguration element and the common information */ 11215 skb_put_u8(skb, WLAN_EID_EXTENSION); 11216 ml_elem_len = skb_put(skb, 1); 11217 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 11218 ml_elem = skb_put(skb, sizeof(*ml_elem)); 11219 ml_elem->control = 11220 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 11221 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 11222 common = skb_put(skb, common_size); 11223 common->len = common_size + var_common_size; 11224 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 11225 11226 if (add_links_data) { 11227 if (eml_capa & 11228 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 11229 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 11230 ml_elem->control |= 11231 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 11232 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 11233 } 11234 11235 ml_elem->control |= 11236 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 11237 11238 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 11239 } 11240 11241 if (ext_mld_capa_ops) { 11242 ml_elem->control |= 11243 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 11244 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 11245 } 11246 11247 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 11248 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 11249 11250 /* Add the per station profile */ 11251 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 11252 u8 *subelem_len = NULL; 11253 u16 ctrl; 11254 const u8 *addr; 11255 11256 /* Skip links that are not changing */ 11257 if (!(removed_links & BIT(link_id)) && 11258 (!add_links_data || !add_links_data->link[link_id].bss)) 11259 continue; 11260 11261 ctrl = link_id | 11262 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 11263 11264 if (removed_links & BIT(link_id)) { 11265 struct ieee80211_bss_conf *conf = 11266 sdata_dereference(sdata->vif.link_conf[link_id], 11267 sdata); 11268 if (!conf) 11269 continue; 11270 11271 addr = conf->addr; 11272 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 11273 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 11274 } else { 11275 addr = add_links_data->link[link_id].addr; 11276 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 11277 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 11278 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 11279 } 11280 11281 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 11282 subelem_len = skb_put(skb, 1); 11283 11284 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 11285 skb_put_u8(skb, 1 + ETH_ALEN); 11286 skb_put_data(skb, addr, ETH_ALEN); 11287 11288 if (!(removed_links & BIT(link_id))) { 11289 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 11290 size_t extra_used; 11291 void *capab_pos; 11292 u8 qos_info; 11293 11294 capab_pos = skb_put(skb, 2); 11295 11296 extra_used = 11297 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 11298 add_links_data->link[link_id].elems, 11299 add_links_data->link[link_id].elems_len, 11300 link_id, NULL, 11301 link_present_elems, 11302 add_links_data); 11303 11304 if (add_links_data->link[link_id].elems) 11305 skb_put_data(skb, 11306 add_links_data->link[link_id].elems + 11307 extra_used, 11308 add_links_data->link[link_id].elems_len - 11309 extra_used); 11310 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 11311 qos_info = sdata->u.mgd.uapsd_queues; 11312 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 11313 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 11314 } else { 11315 qos_info = 0; 11316 } 11317 11318 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 11319 put_unaligned_le16(capab, capab_pos); 11320 } 11321 11322 ieee80211_fragment_element(skb, subelem_len, 11323 IEEE80211_MLE_SUBELEM_FRAGMENT); 11324 } 11325 11326 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 11327 11328 info = IEEE80211_SKB_CB(skb); 11329 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 11330 11331 return skb; 11332 } 11333 11334 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 11335 struct cfg80211_ml_reconf_req *req) 11336 { 11337 const struct wiphy_iftype_ext_capab *ift_ext_capa; 11338 struct ieee80211_local *local = sdata->local; 11339 struct ieee80211_mgd_assoc_data *data = NULL; 11340 struct sta_info *sta; 11341 struct sk_buff *skb; 11342 u16 added_links, new_valid_links; 11343 u16 driver_ext_mld_capa_ops = 0; 11344 int link_id, err; 11345 11346 if (!ieee80211_vif_is_mld(&sdata->vif) || 11347 !(sdata->vif.cfg.mld_capa_op & 11348 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 11349 return -EINVAL; 11350 11351 /* No support for concurrent ML reconfiguration operation */ 11352 if (sdata->u.mgd.reconf.added_links || 11353 sdata->u.mgd.reconf.removed_links) 11354 return -EBUSY; 11355 11356 added_links = 0; 11357 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 11358 if (!req->add_links[link_id].bss) 11359 continue; 11360 11361 added_links |= BIT(link_id); 11362 } 11363 11364 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 11365 if (WARN_ON(!sta)) 11366 return -ENOLINK; 11367 11368 /* Adding links to the set of valid link is done only after a successful 11369 * ML reconfiguration frame exchange. Here prepare the data for the ML 11370 * reconfiguration frame construction and allocate the required 11371 * resources 11372 */ 11373 if (added_links) { 11374 bool uapsd_supported; 11375 11376 data = kzalloc_obj(*data); 11377 if (!data) 11378 return -ENOMEM; 11379 11380 data->assoc_link_id = -1; 11381 data->wmm = true; 11382 11383 uapsd_supported = true; 11384 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11385 link_id++) { 11386 struct ieee80211_supported_band *sband; 11387 struct cfg80211_bss *link_cbss = 11388 req->add_links[link_id].bss; 11389 struct ieee80211_bss *bss; 11390 11391 if (!link_cbss) 11392 continue; 11393 11394 bss = (void *)link_cbss->priv; 11395 11396 if (!bss->wmm_used) { 11397 err = -EINVAL; 11398 goto err_free; 11399 } 11400 11401 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 11402 err = -EINVAL; 11403 goto err_free; 11404 } 11405 11406 eth_random_addr(data->link[link_id].addr); 11407 data->link[link_id].conn = 11408 ieee80211_conn_settings_unlimited; 11409 sband = 11410 local->hw.wiphy->bands[link_cbss->channel->band]; 11411 11412 ieee80211_determine_our_sta_mode(sdata, sband, 11413 NULL, true, link_id, 11414 &data->link[link_id].conn); 11415 11416 data->link[link_id].bss = link_cbss; 11417 data->link[link_id].elems = 11418 (u8 *)req->add_links[link_id].elems; 11419 data->link[link_id].elems_len = 11420 req->add_links[link_id].elems_len; 11421 11422 if (!bss->uapsd_supported) 11423 uapsd_supported = false; 11424 11425 if (data->link[link_id].conn.mode < 11426 IEEE80211_CONN_MODE_EHT) { 11427 err = -EINVAL; 11428 goto err_free; 11429 } 11430 11431 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 11432 link_id); 11433 if (err) { 11434 err = -EINVAL; 11435 goto err_free; 11436 } 11437 } 11438 11439 /* Require U-APSD support if we enabled it */ 11440 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 11441 !uapsd_supported) { 11442 err = -EINVAL; 11443 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 11444 goto err_free; 11445 } 11446 11447 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11448 link_id++) { 11449 if (!data->link[link_id].bss) 11450 continue; 11451 11452 /* only used to verify the mode, nothing is allocated */ 11453 err = ieee80211_prep_channel(sdata, NULL, NULL, link_id, 11454 data->link[link_id].bss, 11455 true, 11456 &data->link[link_id].conn, 11457 sdata->u.mgd.userspace_selectors); 11458 if (err) 11459 goto err_free; 11460 } 11461 } 11462 11463 /* link removal is done before the ML reconfiguration frame exchange so 11464 * that these links will not be used between their removal by the AP MLD 11465 * and before the station got the ML reconfiguration response. Based on 11466 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 11467 * link removal request. 11468 */ 11469 if (req->rem_links) { 11470 u16 new_active_links = 11471 sdata->vif.active_links & ~req->rem_links; 11472 11473 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 11474 11475 /* Should not be left with no valid links to perform the 11476 * ML reconfiguration 11477 */ 11478 if (!new_valid_links || 11479 !(new_valid_links & ~sdata->vif.dormant_links)) { 11480 sdata_info(sdata, "mlo: reconf: no valid links\n"); 11481 err = -EINVAL; 11482 goto err_free; 11483 } 11484 11485 if (new_active_links != sdata->vif.active_links) { 11486 if (!new_active_links) 11487 new_active_links = 11488 BIT(__ffs(new_valid_links & 11489 ~sdata->vif.dormant_links)); 11490 11491 err = ieee80211_set_active_links(&sdata->vif, 11492 new_active_links); 11493 if (err) { 11494 sdata_info(sdata, 11495 "mlo: reconf: failed set active links\n"); 11496 goto err_free; 11497 } 11498 } 11499 } 11500 11501 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 11502 ieee80211_vif_type_p2p(&sdata->vif)); 11503 if (ift_ext_capa) 11504 driver_ext_mld_capa_ops = ift_ext_capa->ext_mld_capa_and_ops; 11505 11506 /* Build the SKB before the link removal as the construction of the 11507 * station info for removed links requires the local address. 11508 * Invalidate the removed links, so that the transmission of the ML 11509 * reconfiguration request frame would not be done using them, as the AP 11510 * is expected to send the ML reconfiguration response frame on the link 11511 * on which the request was received. 11512 */ 11513 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 11514 cpu_to_le16(req->ext_mld_capa_ops | 11515 driver_ext_mld_capa_ops)); 11516 if (!skb) { 11517 err = -ENOMEM; 11518 goto err_free; 11519 } 11520 11521 if (req->rem_links) { 11522 u16 new_dormant_links = 11523 sdata->vif.dormant_links & ~req->rem_links; 11524 11525 err = ieee80211_vif_set_links(sdata, new_valid_links, 11526 new_dormant_links); 11527 if (err) { 11528 sdata_info(sdata, 11529 "mlo: reconf: failed set valid links\n"); 11530 kfree_skb(skb); 11531 goto err_free; 11532 } 11533 11534 /* notify the driver and upper layers */ 11535 ieee80211_vif_cfg_change_notify(sdata, 11536 BSS_CHANGED_MLD_VALID_LINKS); 11537 cfg80211_links_removed(sdata->dev, req->rem_links); 11538 } 11539 11540 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 11541 added_links, req->rem_links); 11542 11543 ieee80211_tx_skb(sdata, skb); 11544 11545 sdata->u.mgd.reconf.added_links = added_links; 11546 sdata->u.mgd.reconf.add_links_data = data; 11547 sdata->u.mgd.reconf.removed_links = req->rem_links; 11548 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 11549 &sdata->u.mgd.reconf.wk, 11550 IEEE80211_ASSOC_TIMEOUT_SHORT); 11551 return 0; 11552 11553 err_free: 11554 kfree(data); 11555 return err; 11556 } 11557 11558 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 11559 { 11560 unsigned long valid_links = sdata->vif.valid_links; 11561 u8 link_id; 11562 11563 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11564 11565 if (!ieee80211_vif_is_mld(&sdata->vif)) 11566 return false; 11567 11568 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 11569 struct ieee80211_bss_conf *bss_conf = 11570 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 11571 11572 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 11573 return false; 11574 } 11575 11576 return true; 11577 } 11578 11579 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 11580 { 11581 int frame_len = IEEE80211_MIN_ACTION_SIZE(epcs) + (enable ? 1 : 0); 11582 struct ieee80211_local *local = sdata->local; 11583 struct ieee80211_mgmt *mgmt; 11584 struct sk_buff *skb; 11585 11586 if (!ieee80211_mgd_epcs_supp(sdata)) 11587 return -EINVAL; 11588 11589 if (sdata->u.mgd.epcs.enabled == enable && 11590 !sdata->u.mgd.epcs.dialog_token) 11591 return 0; 11592 11593 /* Do not allow enabling EPCS if the AP didn't respond yet. 11594 * However, allow disabling EPCS in such a case. 11595 */ 11596 if (sdata->u.mgd.epcs.dialog_token && enable) 11597 return -EALREADY; 11598 11599 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 11600 if (!skb) 11601 return -ENOBUFS; 11602 11603 skb_reserve(skb, local->hw.extra_tx_headroom); 11604 mgmt = skb_put_zero(skb, frame_len); 11605 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11606 IEEE80211_STYPE_ACTION); 11607 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11608 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11609 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11610 11611 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11612 if (enable) { 11613 u8 *pos = mgmt->u.action.epcs.variable; 11614 11615 mgmt->u.action.action_code = 11616 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 11617 11618 *pos = ++sdata->u.mgd.dialog_token_alloc; 11619 sdata->u.mgd.epcs.dialog_token = *pos; 11620 } else { 11621 mgmt->u.action.action_code = 11622 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 11623 11624 ieee80211_epcs_teardown(sdata); 11625 ieee80211_epcs_changed(sdata, false); 11626 } 11627 11628 ieee80211_tx_skb(sdata, skb); 11629 return 0; 11630 } 11631 11632 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 11633 struct ieee802_11_elems *elems) 11634 { 11635 const struct element *sub; 11636 size_t scratch_len = elems->ml_epcs_len; 11637 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 11638 11639 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11640 11641 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 11642 return; 11643 11644 if (WARN_ON(!scratch)) 11645 return; 11646 11647 /* Directly parse the sub elements as the common information doesn't 11648 * hold any useful information. 11649 */ 11650 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 11651 elems->ml_epcs_len) { 11652 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 11653 struct ieee80211_link_data *link; 11654 u8 *pos = (void *)sub->data; 11655 u16 control; 11656 ssize_t len; 11657 u8 link_id; 11658 11659 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11660 continue; 11661 11662 if (sub->datalen < sizeof(control)) 11663 break; 11664 11665 control = get_unaligned_le16(pos); 11666 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11667 11668 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 11669 continue; 11670 11671 link = sdata_dereference(sdata->link[link_id], sdata); 11672 if (!link) 11673 continue; 11674 11675 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11676 elems->ml_epcs_len, 11677 scratch, scratch_len, 11678 IEEE80211_MLE_SUBELEM_FRAGMENT); 11679 if (len < (ssize_t)sizeof(control)) 11680 continue; 11681 11682 pos = scratch + sizeof(control); 11683 len -= sizeof(control); 11684 11685 link_elems = ieee802_11_parse_elems(pos, len, 11686 IEEE80211_FTYPE_MGMT | 11687 IEEE80211_STYPE_ACTION, 11688 NULL); 11689 if (!link_elems) 11690 continue; 11691 11692 if (ieee80211_sta_wmm_params(sdata->local, link, 11693 link_elems->wmm_param, 11694 link_elems->wmm_param_len, 11695 link_elems->mu_edca_param_set)) 11696 ieee80211_link_info_change_notify(sdata, link, 11697 BSS_CHANGED_QOS); 11698 } 11699 } 11700 11701 static void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11702 struct ieee80211_mgmt *mgmt, 11703 size_t len) 11704 { 11705 struct ieee802_11_elems *elems __free(kfree) = NULL; 11706 size_t ies_len; 11707 u16 status_code; 11708 u8 *pos, dialog_token; 11709 11710 if (!ieee80211_mgd_epcs_supp(sdata)) 11711 return; 11712 11713 /* Handle dialog token and status code */ 11714 pos = mgmt->u.action.epcs.variable; 11715 dialog_token = *pos; 11716 status_code = get_unaligned_le16(pos + 1); 11717 11718 /* An EPCS enable response with dialog token == 0 is an unsolicited 11719 * notification from the AP MLD. In such a case, EPCS should already be 11720 * enabled and status must be success 11721 */ 11722 if (!dialog_token && 11723 (!sdata->u.mgd.epcs.enabled || 11724 status_code != WLAN_STATUS_SUCCESS)) 11725 return; 11726 11727 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11728 return; 11729 11730 sdata->u.mgd.epcs.dialog_token = 0; 11731 11732 if (status_code != WLAN_STATUS_SUCCESS) 11733 return; 11734 11735 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11736 ies_len = len - IEEE80211_MIN_ACTION_SIZE(epcs) - 11737 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11738 11739 elems = ieee802_11_parse_elems(pos, ies_len, 11740 IEEE80211_FTYPE_MGMT | 11741 IEEE80211_STYPE_ACTION, 11742 NULL); 11743 if (!elems) 11744 return; 11745 11746 ieee80211_ml_epcs(sdata, elems); 11747 ieee80211_epcs_changed(sdata, true); 11748 } 11749 11750 static void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11751 struct ieee80211_mgmt *mgmt, 11752 size_t len) 11753 { 11754 if (!ieee80211_vif_is_mld(&sdata->vif) || 11755 !sdata->u.mgd.epcs.enabled) 11756 return; 11757 11758 ieee80211_epcs_teardown(sdata); 11759 ieee80211_epcs_changed(sdata, false); 11760 } 11761 11762 void ieee80211_sta_rx_queued_frame(struct ieee80211_sub_if_data *sdata, 11763 struct sk_buff *skb) 11764 { 11765 struct ieee80211_link_data *link = &sdata->deflink; 11766 struct ieee80211_rx_status *rx_status; 11767 struct ieee802_11_elems *elems; 11768 struct ieee80211_mgmt *mgmt; 11769 u16 fc; 11770 int ies_len; 11771 11772 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11773 11774 mgmt = (struct ieee80211_mgmt *) skb->data; 11775 11776 if (ieee80211_is_ext(mgmt->frame_control)) { 11777 ieee80211_sta_rx_queued_ext(sdata, skb); 11778 return; 11779 } 11780 11781 rx_status = (struct ieee80211_rx_status *) skb->cb; 11782 fc = le16_to_cpu(mgmt->frame_control); 11783 11784 if (rx_status->link_valid) { 11785 link = sdata_dereference(sdata->link[rx_status->link_id], 11786 sdata); 11787 if (!link) 11788 return; 11789 } 11790 11791 switch (fc & IEEE80211_FCTL_STYPE) { 11792 case IEEE80211_STYPE_BEACON: 11793 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 11794 skb->len, rx_status); 11795 break; 11796 case IEEE80211_STYPE_PROBE_RESP: 11797 ieee80211_rx_mgmt_probe_resp(link, skb); 11798 break; 11799 case IEEE80211_STYPE_AUTH: 11800 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 11801 break; 11802 case IEEE80211_STYPE_DEAUTH: 11803 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 11804 break; 11805 case IEEE80211_STYPE_DISASSOC: 11806 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 11807 break; 11808 case IEEE80211_STYPE_ASSOC_RESP: 11809 case IEEE80211_STYPE_REASSOC_RESP: 11810 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 11811 break; 11812 case IEEE80211_STYPE_ACTION: 11813 if (!sdata->u.mgd.associated || 11814 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 11815 break; 11816 11817 switch (mgmt->u.action.category) { 11818 case WLAN_CATEGORY_SPECTRUM_MGMT: 11819 ies_len = skb->len - 11820 offsetof(struct ieee80211_mgmt, 11821 u.action.chan_switch.variable); 11822 11823 if (ies_len < 0) 11824 break; 11825 11826 /* CSA IE cannot be overridden, no need for BSSID */ 11827 elems = ieee802_11_parse_elems(mgmt->u.action.chan_switch.variable, 11828 ies_len, 11829 IEEE80211_FTYPE_MGMT | 11830 IEEE80211_STYPE_ACTION, 11831 NULL); 11832 11833 if (elems && !elems->parse_error) { 11834 enum ieee80211_csa_source src = 11835 IEEE80211_CSA_SOURCE_PROT_ACTION; 11836 11837 ieee80211_sta_process_chanswitch(link, 11838 rx_status->mactime, 11839 rx_status->device_timestamp, 11840 elems, elems, 11841 src); 11842 } 11843 kfree(elems); 11844 break; 11845 case WLAN_CATEGORY_PUBLIC: 11846 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 11847 ies_len = skb->len - 11848 offsetof(struct ieee80211_mgmt, 11849 u.action.ext_chan_switch.variable); 11850 11851 if (ies_len < 0) 11852 break; 11853 11854 /* 11855 * extended CSA IE can't be overridden, no need for 11856 * BSSID 11857 */ 11858 elems = ieee802_11_parse_elems(mgmt->u.action.ext_chan_switch.variable, 11859 ies_len, 11860 IEEE80211_FTYPE_MGMT | 11861 IEEE80211_STYPE_ACTION, 11862 NULL); 11863 11864 if (elems && !elems->parse_error) { 11865 enum ieee80211_csa_source src; 11866 11867 if (mgmt->u.action.category == 11868 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 11869 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 11870 else 11871 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 11872 11873 /* for the handling code pretend it was an IE */ 11874 elems->ext_chansw_ie = 11875 &mgmt->u.action.ext_chan_switch.data; 11876 11877 ieee80211_sta_process_chanswitch(link, 11878 rx_status->mactime, 11879 rx_status->device_timestamp, 11880 elems, elems, 11881 src); 11882 } 11883 11884 kfree(elems); 11885 break; 11886 case WLAN_CATEGORY_PROTECTED_EHT: 11887 switch (mgmt->u.action.action_code) { 11888 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ: 11889 ieee80211_process_neg_ttlm_req(sdata, mgmt, 11890 skb->len); 11891 break; 11892 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES: 11893 ieee80211_process_neg_ttlm_res(sdata, mgmt, 11894 skb->len); 11895 break; 11896 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN: 11897 ieee80211_process_ttlm_teardown(sdata); 11898 break; 11899 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP: 11900 ieee80211_process_ml_reconf_resp(sdata, mgmt, 11901 skb->len); 11902 break; 11903 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP: 11904 ieee80211_process_epcs_ena_resp(sdata, mgmt, 11905 skb->len); 11906 break; 11907 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN: 11908 ieee80211_process_epcs_teardown(sdata, mgmt, 11909 skb->len); 11910 break; 11911 default: 11912 break; 11913 } 11914 break; 11915 case WLAN_CATEGORY_PROTECTED_UHR: 11916 switch (mgmt->u.action.action_code) { 11917 case IEEE80211_PROTECTED_UHR_ACTION_LINK_RECONFIG_NOTIFY: 11918 ieee80211_process_uhr_link_reconf_notif(sdata, 11919 mgmt, 11920 skb->len); 11921 break; 11922 } 11923 break; 11924 } 11925 break; 11926 } 11927 } 11928