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 enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 const struct ieee80211_uhr_operation *uhr_oper = elems->uhr_operation; 166 struct ieee80211_supported_band *sband = 167 sdata->local->hw.wiphy->bands[channel->band]; 168 struct cfg80211_chan_def vht_chandef; 169 bool no_vht = false; 170 u32 ht_cfreq; 171 172 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 173 ignore_ht_channel_mismatch = false; 174 175 *chandef = (struct cfg80211_chan_def) { 176 .chan = channel, 177 .width = NL80211_CHAN_WIDTH_20_NOHT, 178 .center_freq1 = channel->center_freq, 179 .freq1_offset = channel->freq_offset, 180 }; 181 182 /* get special S1G case out of the way */ 183 if (sband->band == NL80211_BAND_S1GHZ) { 184 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 185 chandef)) { 186 /* Fallback to default 1MHz */ 187 chandef->width = NL80211_CHAN_WIDTH_1; 188 chandef->s1g_primary_2mhz = false; 189 } 190 191 return IEEE80211_CONN_MODE_S1G; 192 } 193 194 /* get special 6 GHz case out of the way */ 195 if (sband->band == NL80211_BAND_6GHZ) { 196 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_HIGHEST; 197 198 /* this is an error */ 199 if (conn->mode < IEEE80211_CONN_MODE_HE) 200 return IEEE80211_CONN_MODE_LEGACY; 201 202 if (!elems->he_6ghz_capa || !elems->he_cap) { 203 sdata_info(sdata, 204 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 205 return IEEE80211_CONN_MODE_LEGACY; 206 } 207 208 if (!eht_oper || !elems->eht_cap) { 209 eht_oper = NULL; 210 mode = IEEE80211_CONN_MODE_HE; 211 } 212 213 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 214 eht_oper, chandef)) { 215 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 216 return IEEE80211_CONN_MODE_LEGACY; 217 } 218 219 if (eht_oper && ieee80211_hw_check(&sdata->local->hw, STRICT)) { 220 struct cfg80211_chan_def he_chandef = *chandef; 221 222 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, 223 he_oper, NULL, 224 &he_chandef)) { 225 sdata_info(sdata, 226 "bad HE operation in EHT AP\n"); 227 return IEEE80211_CONN_MODE_LEGACY; 228 } 229 230 if (!cfg80211_chandef_compatible(chandef, 231 &he_chandef)) { 232 sdata_info(sdata, "HE/EHT incompatible\n"); 233 return IEEE80211_CONN_MODE_LEGACY; 234 } 235 } 236 237 if (mode <= IEEE80211_CONN_MODE_EHT) 238 return mode; 239 goto check_uhr; 240 } 241 242 /* now we have the progression HT, VHT, ... */ 243 if (conn->mode < IEEE80211_CONN_MODE_HT) 244 return IEEE80211_CONN_MODE_LEGACY; 245 246 if (!ht_oper || !elems->ht_cap_elem) 247 return IEEE80211_CONN_MODE_LEGACY; 248 249 chandef->width = NL80211_CHAN_WIDTH_20; 250 251 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 252 channel->band); 253 /* check that channel matches the right operating channel */ 254 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 255 /* 256 * It's possible that some APs are confused here; 257 * Netgear WNDR3700 sometimes reports 4 higher than 258 * the actual channel in association responses, but 259 * since we look at probe response/beacon data here 260 * it should be OK. 261 */ 262 sdata_info(sdata, 263 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 264 channel->center_freq, ht_cfreq, 265 ht_oper->primary_chan, channel->band); 266 return IEEE80211_CONN_MODE_LEGACY; 267 } 268 269 ieee80211_chandef_ht_oper(ht_oper, chandef); 270 271 if (conn->mode < IEEE80211_CONN_MODE_VHT) 272 return IEEE80211_CONN_MODE_HT; 273 274 vht_chandef = *chandef; 275 276 /* 277 * having he_cap/he_oper parsed out implies we're at 278 * least operating as HE STA 279 */ 280 if (elems->he_cap && he_oper && 281 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 282 struct ieee80211_vht_operation he_oper_vht_cap; 283 284 /* 285 * Set only first 3 bytes (other 2 aren't used in 286 * ieee80211_chandef_vht_oper() anyway) 287 */ 288 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 289 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 290 291 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 292 &he_oper_vht_cap, ht_oper, 293 &vht_chandef)) { 294 sdata_info(sdata, 295 "HE AP VHT information is invalid, disabling HE\n"); 296 /* this will cause us to re-parse as VHT STA */ 297 return IEEE80211_CONN_MODE_VHT; 298 } 299 } else if (!vht_oper || !elems->vht_cap_elem) { 300 if (sband->band == NL80211_BAND_5GHZ) 301 return IEEE80211_CONN_MODE_HT; 302 no_vht = true; 303 } else if (sband->band == NL80211_BAND_2GHZ) { 304 no_vht = true; 305 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 306 vht_cap_info, 307 vht_oper, ht_oper, 308 &vht_chandef)) { 309 sdata_info(sdata, 310 "AP VHT information is invalid, disabling VHT\n"); 311 return IEEE80211_CONN_MODE_HT; 312 } 313 314 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 315 sdata_info(sdata, 316 "AP VHT information doesn't match HT, disabling VHT\n"); 317 return IEEE80211_CONN_MODE_HT; 318 } 319 320 *chandef = vht_chandef; 321 322 /* stick to current max mode if we or the AP don't have HE */ 323 if (conn->mode < IEEE80211_CONN_MODE_HE || 324 !elems->he_operation || !elems->he_cap) { 325 if (no_vht) 326 return IEEE80211_CONN_MODE_HT; 327 return IEEE80211_CONN_MODE_VHT; 328 } 329 330 /* stick to HE if we or the AP don't have EHT */ 331 if (conn->mode < IEEE80211_CONN_MODE_EHT || 332 !eht_oper || !elems->eht_cap) 333 return IEEE80211_CONN_MODE_HE; 334 335 /* 336 * handle the case that the EHT operation indicates that it holds EHT 337 * operation information (in case that the channel width differs from 338 * the channel width reported in HT/VHT/HE). 339 */ 340 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 341 struct cfg80211_chan_def eht_chandef = *chandef; 342 343 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 344 &eht_chandef); 345 346 eht_chandef.punctured = 347 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 348 349 if (!cfg80211_chandef_valid(&eht_chandef)) { 350 sdata_info(sdata, 351 "AP EHT information is invalid, disabling EHT\n"); 352 return IEEE80211_CONN_MODE_HE; 353 } 354 355 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 356 sdata_info(sdata, 357 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 358 return IEEE80211_CONN_MODE_HE; 359 } 360 361 *chandef = eht_chandef; 362 } 363 364 check_uhr: 365 if (conn->mode < IEEE80211_CONN_MODE_UHR || !uhr_oper) 366 return IEEE80211_CONN_MODE_EHT; 367 368 /* 369 * In beacons we don't have all the data - but we know the size was OK, 370 * so if the size is valid as a non-beacon case, we have more data and 371 * can validate the NPCA parameters. 372 */ 373 if (ieee80211_uhr_oper_size_ok((const void *)uhr_oper, 374 elems->uhr_operation_len, 375 false)) { 376 struct cfg80211_chan_def npca_chandef = *chandef; 377 const struct ieee80211_uhr_npca_info *npca; 378 const __le16 *dis_subch_bmap; 379 u16 punct = chandef->punctured, npca_punct; 380 381 npca = ieee80211_uhr_npca_info(uhr_oper); 382 if (npca) { 383 int width = cfg80211_chandef_get_width(chandef); 384 u8 offs = le32_get_bits(npca->params, 385 IEEE80211_UHR_NPCA_PARAMS_PRIMARY_CHAN_OFFS); 386 u32 cf1 = chandef->center_freq1; 387 bool pri_upper, npca_upper; 388 389 pri_upper = chandef->chan->center_freq > cf1; 390 npca_upper = 20 * offs >= width / 2; 391 392 if (20 * offs >= cfg80211_chandef_get_width(chandef) || 393 pri_upper == npca_upper) { 394 sdata_info(sdata, 395 "AP UHR NPCA primary channel invalid, disabling UHR\n"); 396 return IEEE80211_CONN_MODE_EHT; 397 } 398 } 399 400 dis_subch_bmap = ieee80211_uhr_npca_dis_subch_bitmap(uhr_oper); 401 402 if (dis_subch_bmap) { 403 npca_punct = get_unaligned_le16(dis_subch_bmap); 404 npca_chandef.punctured = npca_punct; 405 } 406 407 /* 408 * must be a valid puncturing pattern for this channel as 409 * well as puncturing all subchannels that are already in 410 * the disabled subchannel bitmap on the primary channel 411 */ 412 if (!cfg80211_chandef_valid(&npca_chandef) || 413 ((punct & npca_punct) != punct)) { 414 sdata_info(sdata, 415 "AP UHR NPCA disabled subchannel bitmap invalid, disabling UHR\n"); 416 return IEEE80211_CONN_MODE_EHT; 417 } 418 } 419 420 return IEEE80211_CONN_MODE_UHR; 421 } 422 423 static bool 424 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 425 struct ieee80211_supported_band *sband, 426 const struct ieee80211_ht_operation *ht_op) 427 { 428 struct ieee80211_sta_ht_cap sta_ht_cap; 429 int i; 430 431 if (sband->band == NL80211_BAND_6GHZ) 432 return true; 433 434 if (!ht_op) 435 return false; 436 437 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 438 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 439 440 /* 441 * P802.11REVme/D7.0 - 6.5.4.2.4 442 * ... 443 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 444 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 445 * in the HT Operation parameter that contains any unsupported MCSs, 446 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 447 * contain a ResultCode parameter that is not set to the value SUCCESS. 448 * ... 449 */ 450 451 /* Simply check that all basic rates are in the STA RX mask */ 452 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 453 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 454 ht_op->basic_set[i]) 455 return false; 456 } 457 458 return true; 459 } 460 461 static bool 462 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 463 int link_id, 464 struct ieee80211_supported_band *sband, 465 const struct ieee80211_vht_operation *vht_op) 466 { 467 struct ieee80211_sta_vht_cap sta_vht_cap; 468 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 469 int nss; 470 471 if (sband->band != NL80211_BAND_5GHZ) 472 return true; 473 474 if (!vht_op) 475 return false; 476 477 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 478 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 479 480 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 481 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 482 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 483 484 /* 485 * Many APs are incorrectly advertising an all-zero value here, 486 * which really means MCS 0-7 are required for 1-8 streams, but 487 * they don't really mean it that way. 488 * Some other APs are incorrectly advertising 3 spatial streams 489 * with MCS 0-7 are required, but don't really mean it that way 490 * and we'll connect only with HT, rather than even HE. 491 * As a result, unfortunately the VHT basic MCS/NSS set cannot 492 * be used at all, so check it only in strict mode. 493 */ 494 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 495 return true; 496 497 /* 498 * P802.11REVme/D7.0 - 6.5.4.2.4 499 * ... 500 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 501 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 502 * field in the VHT Operation parameter that contains any unsupported 503 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 504 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 505 * that is not set to the value SUCCESS. 506 * ... 507 */ 508 for (nss = 8; nss > 0; nss--) { 509 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 510 u8 sta_rx_val; 511 u8 sta_tx_val; 512 513 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 514 continue; 515 516 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 517 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 518 519 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 520 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 521 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 522 link_id_info(sdata, link_id, 523 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 524 nss, sta_rx_val, sta_tx_val, ap_op_val); 525 return false; 526 } 527 } 528 529 return true; 530 } 531 532 static bool 533 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 534 int link_id, 535 const struct ieee80211_he_cap_elem *he_cap, 536 const struct ieee80211_he_operation *he_op) 537 { 538 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 539 u16 mcs_80_map_tx, mcs_80_map_rx; 540 u16 ap_min_req_set; 541 int nss; 542 543 if (!he_cap) 544 return false; 545 546 /* mcs_nss is right after he_cap info */ 547 he_mcs_nss_supp = (void *)(he_cap + 1); 548 549 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 550 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 551 552 /* P802.11-REVme/D0.3 553 * 27.1.1 Introduction to the HE PHY 554 * ... 555 * An HE STA shall support the following features: 556 * ... 557 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 558 * supported channel widths for HE SU PPDUs 559 */ 560 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 561 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 562 link_id_info(sdata, link_id, 563 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 564 mcs_80_map_tx, mcs_80_map_rx); 565 return false; 566 } 567 568 if (!he_op) 569 return true; 570 571 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 572 573 /* 574 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 575 * zeroes, which is nonsense, and completely inconsistent with itself 576 * (it doesn't have 8 streams). Accept the settings in this case anyway. 577 */ 578 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 579 return true; 580 581 /* make sure the AP is consistent with itself 582 * 583 * P802.11-REVme/D0.3 584 * 26.17.1 Basic HE BSS operation 585 * 586 * A STA that is operating in an HE BSS shall be able to receive and 587 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 588 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 589 * MLME-START.request primitive and shall be able to receive at each of 590 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 591 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 592 * primitive 593 */ 594 for (nss = 8; nss > 0; nss--) { 595 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 596 u8 ap_rx_val; 597 u8 ap_tx_val; 598 599 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 600 continue; 601 602 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 603 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 604 605 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 606 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 608 link_id_info(sdata, link_id, 609 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 610 nss, ap_rx_val, ap_tx_val, ap_op_val); 611 return false; 612 } 613 } 614 615 return true; 616 } 617 618 static bool 619 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 620 struct ieee80211_supported_band *sband, 621 const struct ieee80211_he_operation *he_op) 622 { 623 const struct ieee80211_sta_he_cap *sta_he_cap = 624 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 625 u16 ap_min_req_set; 626 int i; 627 628 if (!sta_he_cap || !he_op) 629 return false; 630 631 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 632 633 /* 634 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 635 * zeroes, which is nonsense, and completely inconsistent with itself 636 * (it doesn't have 8 streams). Accept the settings in this case anyway. 637 */ 638 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 639 return true; 640 641 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 642 for (i = 0; i < 3; i++) { 643 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 644 &sta_he_cap->he_mcs_nss_supp; 645 u16 sta_mcs_map_rx = 646 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 647 u16 sta_mcs_map_tx = 648 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 649 u8 nss; 650 bool verified = true; 651 652 /* 653 * For each band there is a maximum of 8 spatial streams 654 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 655 * of 2 bits per NSS (1-8), with the values defined in enum 656 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 657 * capabilities aren't less than the AP's minimum requirements 658 * for this HE BSS per SS. 659 * It is enough to find one such band that meets the reqs. 660 */ 661 for (nss = 8; nss > 0; nss--) { 662 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 663 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 664 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 665 666 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 667 continue; 668 669 /* 670 * Make sure the HE AP doesn't require MCSs that aren't 671 * supported by the client as required by spec 672 * 673 * P802.11-REVme/D0.3 674 * 26.17.1 Basic HE BSS operation 675 * 676 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 677 * a BSS, unless it supports (i.e., is able to both transmit and 678 * receive using) all of the <HE-MCS, NSS> tuples in the basic 679 * HE-MCS and NSS set. 680 */ 681 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 682 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 683 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 684 verified = false; 685 break; 686 } 687 } 688 689 if (verified) 690 return true; 691 } 692 693 /* If here, STA doesn't meet AP's HE min requirements */ 694 return false; 695 } 696 697 static u8 698 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 699 const struct ieee80211_sta_eht_cap *sta_eht_cap, 700 unsigned int idx, int bw) 701 { 702 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 703 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 704 705 /* handle us being a 20 MHz-only EHT STA - with four values 706 * for MCS 0-7, 8-9, 10-11, 12-13. 707 */ 708 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 709 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 710 711 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 712 if (idx > 0) 713 idx--; 714 715 switch (bw) { 716 case 0: 717 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 718 case 1: 719 if (!(he_phy_cap0 & 720 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 721 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 722 return 0xff; /* pass check */ 723 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 724 case 2: 725 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 726 return 0xff; /* pass check */ 727 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 728 } 729 730 WARN_ON(1); 731 return 0; 732 } 733 734 static bool 735 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 736 struct ieee80211_supported_band *sband, 737 const struct ieee80211_eht_operation *eht_op) 738 { 739 const struct ieee80211_sta_he_cap *sta_he_cap = 740 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 741 const struct ieee80211_sta_eht_cap *sta_eht_cap = 742 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 743 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 744 unsigned int i; 745 746 if (!sta_he_cap || !sta_eht_cap || !eht_op) 747 return false; 748 749 req = &eht_op->basic_mcs_nss; 750 751 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 752 u8 req_rx_nss, req_tx_nss; 753 unsigned int bw; 754 755 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 756 IEEE80211_EHT_MCS_NSS_RX); 757 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 758 IEEE80211_EHT_MCS_NSS_TX); 759 760 for (bw = 0; bw < 3; bw++) { 761 u8 have, have_rx_nss, have_tx_nss; 762 763 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 764 sta_eht_cap, 765 i, bw); 766 have_rx_nss = u8_get_bits(have, 767 IEEE80211_EHT_MCS_NSS_RX); 768 have_tx_nss = u8_get_bits(have, 769 IEEE80211_EHT_MCS_NSS_TX); 770 771 if (req_rx_nss > have_rx_nss || 772 req_tx_nss > have_tx_nss) 773 return false; 774 } 775 } 776 777 return true; 778 } 779 780 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 781 const u8 *supp_rates, 782 unsigned int supp_rates_len, 783 const u8 *ext_supp_rates, 784 unsigned int ext_supp_rates_len, 785 u32 *rates, u32 *basic_rates, 786 unsigned long *unknown_rates_selectors, 787 bool *have_higher_than_11mbit, 788 int *min_rate, int *min_rate_index) 789 { 790 int i, j; 791 792 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 793 u8 supp_rate = i < supp_rates_len ? 794 supp_rates[i] : 795 ext_supp_rates[i - supp_rates_len]; 796 int rate = supp_rate & 0x7f; 797 bool is_basic = !!(supp_rate & 0x80); 798 799 if ((rate * 5) > 110 && have_higher_than_11mbit) 800 *have_higher_than_11mbit = true; 801 802 /* 803 * Skip membership selectors since they're not rates. 804 * 805 * Note: Even though the membership selector and the basic 806 * rate flag share the same bit, they are not exactly 807 * the same. 808 */ 809 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 810 if (unknown_rates_selectors) 811 set_bit(rate, unknown_rates_selectors); 812 continue; 813 } 814 815 for (j = 0; j < sband->n_bitrates; j++) { 816 struct ieee80211_rate *br; 817 int brate; 818 819 br = &sband->bitrates[j]; 820 821 brate = DIV_ROUND_UP(br->bitrate, 5); 822 if (brate == rate) { 823 if (rates) 824 *rates |= BIT(j); 825 if (is_basic && basic_rates) 826 *basic_rates |= BIT(j); 827 if (min_rate && (rate * 5) < *min_rate) { 828 *min_rate = rate * 5; 829 if (min_rate_index) 830 *min_rate_index = j; 831 } 832 break; 833 } 834 } 835 836 /* Handle an unknown entry as if it is an unknown selector */ 837 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 838 set_bit(rate, unknown_rates_selectors); 839 } 840 } 841 842 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 843 const struct cfg80211_chan_def *chandef, 844 u32 prohibited_flags) 845 { 846 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 847 chandef, prohibited_flags)) 848 return false; 849 850 if (chandef->punctured && 851 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 852 return false; 853 854 return true; 855 } 856 857 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 858 { 859 if (c->width == NL80211_CHAN_WIDTH_80P80) 860 return 4 + 4; 861 862 return cfg80211_chandef_get_width(c) / 20; 863 } 864 865 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 866 { 867 switch (c->width) { 868 case NL80211_CHAN_WIDTH_20: 869 case NL80211_CHAN_WIDTH_20_NOHT: 870 return 1; 871 case NL80211_CHAN_WIDTH_40: 872 return 2; 873 case NL80211_CHAN_WIDTH_80P80: 874 case NL80211_CHAN_WIDTH_80: 875 return 3; 876 case NL80211_CHAN_WIDTH_160: 877 return 4; 878 case NL80211_CHAN_WIDTH_320: 879 return 5; 880 default: 881 WARN_ON(1); 882 return 0; 883 } 884 } 885 886 VISIBLE_IF_MAC80211_KUNIT int 887 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 888 u8 n_partial_subchans) 889 { 890 int n = ieee80211_chandef_num_subchans(ap); 891 struct cfg80211_chan_def tmp = *ap; 892 int offset = 0; 893 894 /* 895 * Given a chandef (in this context, it's the AP's) and a number 896 * of subchannels that we want to look at ('n_partial_subchans'), 897 * calculate the offset in number of subchannels between the full 898 * and the subset with the desired width. 899 */ 900 901 /* same number of subchannels means no offset, obviously */ 902 if (n == n_partial_subchans) 903 return 0; 904 905 /* don't WARN - misconfigured APs could cause this if their N > width */ 906 if (n < n_partial_subchans) 907 return 0; 908 909 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 910 u32 prev = tmp.center_freq1; 911 912 ieee80211_chandef_downgrade(&tmp, NULL); 913 914 /* 915 * if center_freq moved up, half the original channels 916 * are gone now but were below, so increase offset 917 */ 918 if (prev < tmp.center_freq1) 919 offset += ieee80211_chandef_num_subchans(&tmp); 920 } 921 922 /* 923 * 80+80 with secondary 80 below primary - four subchannels for it 924 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 925 */ 926 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 927 ap->center_freq2 < ap->center_freq1) 928 offset += 4; 929 930 return offset; 931 } 932 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 933 934 VISIBLE_IF_MAC80211_KUNIT void 935 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 936 const struct cfg80211_chan_def *ap, 937 const struct cfg80211_chan_def *used) 938 { 939 u8 needed = ieee80211_chandef_num_subchans(used); 940 u8 have = ieee80211_chandef_num_subchans(ap); 941 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 942 u8 offset; 943 944 if (!psd->valid) 945 return; 946 947 /* if N is zero, all defaults were used, no point in rearranging */ 948 if (!psd->n) 949 goto out; 950 951 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 952 953 /* 954 * This assumes that 'N' is consistent with the HE channel, as 955 * it should be (otherwise the AP is broken). 956 * 957 * In psd->power we have values in the order 0..N, 0..K, where 958 * N+K should cover the entire channel per 'ap', but even if it 959 * doesn't then we've pre-filled 'unlimited' as defaults. 960 * 961 * But this is all the wrong order, we want to have them in the 962 * order of the 'used' channel. 963 * 964 * So for example, we could have a 320 MHz EHT AP, which has the 965 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 966 * seem to be considered for the TPE), as follows: 967 * 968 * EHT 320: | | | | | | | | | | | | | | | | | 969 * HE 80: | | | | | 970 * used 160: | | | | | | | | | 971 * 972 * N entries: |--|--|--|--| 973 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 974 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 975 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 976 * used chan: 0 1 2 3 4 5 6 7 977 * 978 * The idx in the power array ('power idx') is like this since it 979 * comes directly from the element's N and K entries in their 980 * element order, and those are this way for HE compatibility. 981 * 982 * Rearrange them as desired here, first by putting them into the 983 * 'full chan' order, and then selecting the necessary subset for 984 * the 'used chan'. 985 */ 986 987 /* first reorder according to AP channel */ 988 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 989 for (int i = 0; i < have; i++) { 990 if (i < offset) 991 tmp[i] = psd->power[i + psd->n]; 992 else if (i < offset + psd->n) 993 tmp[i] = psd->power[i - offset]; 994 else 995 tmp[i] = psd->power[i]; 996 } 997 998 /* 999 * and then select the subset for the used channel 1000 * (set everything to defaults first in case a driver is confused) 1001 */ 1002 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 1003 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 1004 for (int i = 0; i < needed; i++) 1005 psd->power[i] = tmp[offset + i]; 1006 1007 out: 1008 /* limit, but don't lie if there are defaults in the data */ 1009 if (needed < psd->count) 1010 psd->count = needed; 1011 } 1012 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 1013 1014 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 1015 const struct cfg80211_chan_def *ap, 1016 const struct cfg80211_chan_def *used) 1017 { 1018 /* ignore this completely for narrow/invalid channels */ 1019 if (!ieee80211_chandef_num_subchans(ap) || 1020 !ieee80211_chandef_num_subchans(used)) { 1021 ieee80211_clear_tpe(tpe); 1022 return; 1023 } 1024 1025 for (int i = 0; i < 2; i++) { 1026 int needed_pwr_count; 1027 1028 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 1029 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 1030 1031 /* limit this to the widths we actually need */ 1032 needed_pwr_count = ieee80211_chandef_num_widths(used); 1033 if (needed_pwr_count < tpe->max_local[i].count) 1034 tpe->max_local[i].count = needed_pwr_count; 1035 if (needed_pwr_count < tpe->max_reg_client[i].count) 1036 tpe->max_reg_client[i].count = needed_pwr_count; 1037 } 1038 } 1039 1040 /* 1041 * The AP part of the channel request is used to distinguish settings 1042 * to the device used for wider bandwidth OFDMA. This is used in the 1043 * channel context code to assign two channel contexts even if they're 1044 * both for the same channel, if the AP bandwidths are incompatible. 1045 * If not EHT (or driver override) then ap.chan == NULL indicates that 1046 * there's no wider BW OFDMA used. 1047 */ 1048 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 1049 struct ieee80211_chan_req *chanreq, 1050 struct ieee80211_conn_settings *conn, 1051 struct cfg80211_chan_def *ap_chandef) 1052 { 1053 chanreq->ap.chan = NULL; 1054 1055 if (conn->mode < IEEE80211_CONN_MODE_EHT) 1056 return; 1057 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1058 return; 1059 1060 chanreq->ap = *ap_chandef; 1061 } 1062 1063 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 1064 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 1065 struct ieee80211_conn_settings *conn, 1066 struct cfg80211_bss *cbss, int link_id, 1067 struct ieee80211_chan_req *chanreq, 1068 struct cfg80211_chan_def *ap_chandef, 1069 unsigned long *userspace_selectors) 1070 { 1071 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1072 struct ieee80211_bss *bss = (void *)cbss->priv; 1073 struct ieee80211_channel *channel = cbss->channel; 1074 struct ieee80211_elems_parse_params parse_params = { 1075 .link_id = -1, 1076 .from_ap = true, 1077 .start = ies->data, 1078 .len = ies->len, 1079 .type = ies->from_beacon ? 1080 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1081 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1082 }; 1083 struct ieee802_11_elems *elems; 1084 struct ieee80211_supported_band *sband; 1085 enum ieee80211_conn_mode ap_mode; 1086 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1087 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1088 int ret; 1089 1090 again: 1091 parse_params.mode = conn->mode; 1092 elems = ieee802_11_parse_elems_full(&parse_params); 1093 if (!elems) 1094 return ERR_PTR(-ENOMEM); 1095 1096 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1097 elems, false, conn, ap_chandef); 1098 1099 /* this should be impossible since parsing depends on our mode */ 1100 if (WARN_ON(ap_mode > conn->mode)) { 1101 ret = -EINVAL; 1102 goto free; 1103 } 1104 1105 if (conn->mode != ap_mode) { 1106 conn->mode = ap_mode; 1107 kfree(elems); 1108 goto again; 1109 } 1110 1111 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1112 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1113 1114 sband = sdata->local->hw.wiphy->bands[channel->band]; 1115 1116 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1117 elems->ext_supp_rates, elems->ext_supp_rates_len, 1118 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1119 NULL); 1120 1121 switch (channel->band) { 1122 case NL80211_BAND_S1GHZ: 1123 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1124 ret = -EINVAL; 1125 goto free; 1126 } 1127 1128 chanreq->oper = *ap_chandef; 1129 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1130 IEEE80211_CHAN_DISABLED)) { 1131 ret = -EINVAL; 1132 goto free; 1133 } 1134 1135 return elems; 1136 case NL80211_BAND_6GHZ: 1137 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1138 link_id_info(sdata, link_id, 1139 "Rejecting non-HE 6/7 GHz connection"); 1140 ret = -EINVAL; 1141 goto free; 1142 } 1143 break; 1144 default: 1145 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1146 ret = -EINVAL; 1147 goto free; 1148 } 1149 } 1150 1151 switch (ap_mode) { 1152 case IEEE80211_CONN_MODE_S1G: 1153 WARN_ON(1); 1154 ret = -EINVAL; 1155 goto free; 1156 case IEEE80211_CONN_MODE_LEGACY: 1157 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1158 break; 1159 case IEEE80211_CONN_MODE_HT: 1160 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1161 conn->bw_limit, 1162 IEEE80211_CONN_BW_LIMIT_40); 1163 break; 1164 case IEEE80211_CONN_MODE_VHT: 1165 case IEEE80211_CONN_MODE_HE: 1166 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1167 conn->bw_limit, 1168 IEEE80211_CONN_BW_LIMIT_160); 1169 break; 1170 case IEEE80211_CONN_MODE_EHT: 1171 case IEEE80211_CONN_MODE_UHR: 1172 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1173 conn->bw_limit, 1174 IEEE80211_CONN_BW_LIMIT_320); 1175 break; 1176 } 1177 1178 chanreq->oper = *ap_chandef; 1179 1180 bitmap_copy(sta_selectors, userspace_selectors, 128); 1181 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1182 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1183 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1184 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1185 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1186 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1187 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1188 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1189 if (conn->mode >= IEEE80211_CONN_MODE_UHR) 1190 set_bit(BSS_MEMBERSHIP_SELECTOR_UHR_PHY, sta_selectors); 1191 1192 /* 1193 * We do not support EPD or GLK so never add them. 1194 * SAE_H2E is handled through userspace_selectors. 1195 */ 1196 1197 /* Check if we support all required features */ 1198 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1199 link_id_info(sdata, link_id, 1200 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1201 ret = -EINVAL; 1202 goto free; 1203 } 1204 1205 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1206 1207 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1208 IEEE80211_CHAN_DISABLED)) { 1209 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1210 link_id_info(sdata, link_id, 1211 "unusable channel (%d MHz) for connection\n", 1212 chanreq->oper.chan->center_freq); 1213 ret = -EINVAL; 1214 goto free; 1215 } 1216 1217 ieee80211_chanreq_downgrade(chanreq, conn); 1218 } 1219 1220 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1221 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1222 IEEE80211_CHAN_NO_HE)) { 1223 conn->mode = IEEE80211_CONN_MODE_VHT; 1224 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1225 conn->bw_limit, 1226 IEEE80211_CONN_BW_LIMIT_160); 1227 } 1228 1229 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1230 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1231 IEEE80211_CHAN_NO_EHT)) { 1232 conn->mode = IEEE80211_CONN_MODE_HE; 1233 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1234 conn->bw_limit, 1235 IEEE80211_CONN_BW_LIMIT_160); 1236 } 1237 1238 if (conn->mode >= IEEE80211_CONN_MODE_UHR && 1239 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1240 IEEE80211_CHAN_NO_UHR)) 1241 conn->mode = IEEE80211_CONN_MODE_EHT; 1242 1243 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1244 link_id_info(sdata, link_id, 1245 "regulatory prevented using AP config, downgraded\n"); 1246 1247 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1248 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1249 elems->ht_operation)) { 1250 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1251 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1252 link_id_info(sdata, link_id, 1253 "required MCSes not supported, disabling HT\n"); 1254 } 1255 1256 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1257 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1258 elems->vht_operation)) { 1259 conn->mode = IEEE80211_CONN_MODE_HT; 1260 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1261 conn->bw_limit, 1262 IEEE80211_CONN_BW_LIMIT_40); 1263 link_id_info(sdata, link_id, 1264 "required MCSes not supported, disabling VHT\n"); 1265 } 1266 1267 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1268 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1269 (void *)elems->he_cap, 1270 elems->he_operation) || 1271 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1272 elems->he_operation))) { 1273 conn->mode = IEEE80211_CONN_MODE_VHT; 1274 link_id_info(sdata, link_id, 1275 "required MCSes not supported, disabling HE\n"); 1276 } 1277 1278 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1279 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1280 elems->eht_operation)) { 1281 conn->mode = IEEE80211_CONN_MODE_HE; 1282 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1283 conn->bw_limit, 1284 IEEE80211_CONN_BW_LIMIT_160); 1285 link_id_info(sdata, link_id, 1286 "required MCSes not supported, disabling EHT\n"); 1287 } 1288 1289 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1290 channel->band != NL80211_BAND_2GHZ && 1291 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1292 conn->mode = IEEE80211_CONN_MODE_HE; 1293 link_id_info(sdata, link_id, 1294 "required bandwidth not supported, disabling EHT\n"); 1295 } 1296 1297 /* the mode can only decrease, so this must terminate */ 1298 if (ap_mode != conn->mode) { 1299 kfree(elems); 1300 goto again; 1301 } 1302 1303 mlme_link_id_dbg(sdata, link_id, 1304 "connecting with %s mode, max bandwidth %d MHz\n", 1305 ieee80211_conn_mode_str(conn->mode), 1306 20 * (1 << conn->bw_limit)); 1307 1308 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1309 ret = -EINVAL; 1310 goto free; 1311 } 1312 1313 return elems; 1314 free: 1315 kfree(elems); 1316 return ERR_PTR(ret); 1317 } 1318 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1319 1320 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1321 struct ieee802_11_elems *elems, 1322 bool update, u64 *changed, u16 stype) 1323 { 1324 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1325 struct ieee80211_sub_if_data *sdata = link->sdata; 1326 struct ieee80211_chan_req chanreq = {}; 1327 struct cfg80211_chan_def ap_chandef; 1328 enum ieee80211_conn_mode ap_mode; 1329 const char *frame; 1330 u32 vht_cap_info = 0; 1331 u16 ht_opmode; 1332 int ret; 1333 1334 switch (stype) { 1335 case IEEE80211_STYPE_BEACON: 1336 frame = "beacon"; 1337 break; 1338 case IEEE80211_STYPE_ASSOC_RESP: 1339 frame = "assoc response"; 1340 break; 1341 case IEEE80211_STYPE_REASSOC_RESP: 1342 frame = "reassoc response"; 1343 break; 1344 case IEEE80211_STYPE_ACTION: 1345 /* the only action frame that gets here */ 1346 frame = "ML reconf response"; 1347 break; 1348 default: 1349 return -EINVAL; 1350 } 1351 1352 /* don't track any bandwidth changes in legacy/S1G modes */ 1353 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1354 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1355 return 0; 1356 1357 if (elems->vht_cap_elem) 1358 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1359 1360 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1361 elems, true, &link->u.mgd.conn, 1362 &ap_chandef); 1363 1364 if (ap_mode != link->u.mgd.conn.mode) { 1365 link_info(link, 1366 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1367 link->u.mgd.bssid, 1368 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1369 ieee80211_conn_mode_str(ap_mode), frame); 1370 return -EINVAL; 1371 } 1372 1373 chanreq.oper = ap_chandef; 1374 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1375 &ap_chandef); 1376 1377 /* 1378 * if HT operation mode changed store the new one - 1379 * this may be applicable even if channel is identical 1380 */ 1381 if (elems->ht_operation) { 1382 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1383 if (link->conf->ht_operation_mode != ht_opmode) { 1384 *changed |= BSS_CHANGED_HT; 1385 link->conf->ht_operation_mode = ht_opmode; 1386 } 1387 } 1388 1389 /* 1390 * Downgrade the new channel if we associated with restricted 1391 * bandwidth capabilities. For example, if we associated as a 1392 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1393 * or config reasons) then switching to a 40 MHz channel now 1394 * won't do us any good -- we couldn't use it with the AP. 1395 */ 1396 while (link->u.mgd.conn.bw_limit < 1397 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1398 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1399 1400 /* TPE element is not present in (re)assoc/ML reconfig response */ 1401 if (stype == IEEE80211_STYPE_BEACON && 1402 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1403 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1404 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1405 &chanreq.oper); 1406 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1407 link->conf->tpe = elems->tpe; 1408 *changed |= BSS_CHANGED_TPE; 1409 } 1410 } 1411 1412 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1413 return 0; 1414 1415 link_info(link, 1416 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1417 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1418 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1419 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1420 chanreq.oper.center_freq2); 1421 1422 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1423 sdata_info(sdata, 1424 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1425 link->u.mgd.bssid, frame); 1426 return -EINVAL; 1427 } 1428 1429 if (!update) { 1430 link->conf->chanreq = chanreq; 1431 return 0; 1432 } 1433 1434 /* 1435 * We're tracking the current AP here, so don't do any further checks 1436 * here. This keeps us from playing ping-pong with regulatory, without 1437 * it the following can happen (for example): 1438 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1439 * - AP advertises regdom US 1440 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1441 * - we detect an unsupported channel and disconnect 1442 * - disconnect causes CRDA to reload world regdomain and the game 1443 * starts anew. 1444 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1445 * 1446 * It seems possible that there are still scenarios with CSA or real 1447 * bandwidth changes where a this could happen, but those cases are 1448 * less common and wouldn't completely prevent using the AP. 1449 */ 1450 1451 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1452 if (ret) { 1453 sdata_info(sdata, 1454 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1455 link->u.mgd.bssid, frame); 1456 return ret; 1457 } 1458 1459 cfg80211_schedule_channels_check(&sdata->wdev); 1460 return 0; 1461 } 1462 1463 /* frame sending functions */ 1464 1465 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1466 struct sk_buff *skb, u8 ap_ht_param, 1467 struct ieee80211_supported_band *sband, 1468 struct ieee80211_channel *channel, 1469 enum ieee80211_smps_mode smps, 1470 const struct ieee80211_conn_settings *conn) 1471 { 1472 u8 *pos; 1473 u32 flags = channel->flags; 1474 u16 cap; 1475 struct ieee80211_sta_ht_cap ht_cap; 1476 1477 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1478 1479 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1480 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1481 1482 /* determine capability flags */ 1483 cap = ht_cap.cap; 1484 1485 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1486 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1487 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1488 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1489 cap &= ~IEEE80211_HT_CAP_SGI_40; 1490 } 1491 break; 1492 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1493 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1495 cap &= ~IEEE80211_HT_CAP_SGI_40; 1496 } 1497 break; 1498 } 1499 1500 /* 1501 * If 40 MHz was disabled associate as though we weren't 1502 * capable of 40 MHz -- some broken APs will never fall 1503 * back to trying to transmit in 20 MHz. 1504 */ 1505 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1506 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1507 cap &= ~IEEE80211_HT_CAP_SGI_40; 1508 } 1509 1510 /* set SM PS mode properly */ 1511 cap &= ~IEEE80211_HT_CAP_SM_PS; 1512 switch (smps) { 1513 case IEEE80211_SMPS_AUTOMATIC: 1514 case IEEE80211_SMPS_NUM_MODES: 1515 WARN_ON(1); 1516 fallthrough; 1517 case IEEE80211_SMPS_OFF: 1518 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1519 IEEE80211_HT_CAP_SM_PS_SHIFT; 1520 break; 1521 case IEEE80211_SMPS_STATIC: 1522 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1523 IEEE80211_HT_CAP_SM_PS_SHIFT; 1524 break; 1525 case IEEE80211_SMPS_DYNAMIC: 1526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1527 IEEE80211_HT_CAP_SM_PS_SHIFT; 1528 break; 1529 } 1530 1531 /* reserve and fill IE */ 1532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1534 } 1535 1536 /* This function determines vht capability flags for the association 1537 * and builds the IE. 1538 * Note - the function returns true to own the MU-MIMO capability 1539 */ 1540 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1541 struct sk_buff *skb, 1542 struct ieee80211_supported_band *sband, 1543 struct ieee80211_vht_cap *ap_vht_cap, 1544 const struct ieee80211_conn_settings *conn) 1545 { 1546 struct ieee80211_local *local = sdata->local; 1547 u8 *pos; 1548 u32 cap; 1549 struct ieee80211_sta_vht_cap vht_cap; 1550 u32 mask, ap_bf_sts, our_bf_sts; 1551 bool mu_mimo_owner = false; 1552 1553 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1554 1555 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1556 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1557 1558 /* determine capability flags */ 1559 cap = vht_cap.cap; 1560 1561 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1562 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1563 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1564 } 1565 1566 /* 1567 * Some APs apparently get confused if our capabilities are better 1568 * than theirs, so restrict what we advertise in the assoc request. 1569 */ 1570 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1571 if (!(ap_vht_cap->vht_cap_info & 1572 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1573 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1574 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1575 else if (!(ap_vht_cap->vht_cap_info & 1576 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1577 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1578 } 1579 1580 /* 1581 * If some other vif is using the MU-MIMO capability we cannot associate 1582 * using MU-MIMO - this will lead to contradictions in the group-id 1583 * mechanism. 1584 * Ownership is defined since association request, in order to avoid 1585 * simultaneous associations with MU-MIMO. 1586 */ 1587 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1588 bool disable_mu_mimo = false; 1589 struct ieee80211_sub_if_data *other; 1590 1591 list_for_each_entry(other, &local->interfaces, list) { 1592 if (other->vif.bss_conf.mu_mimo_owner) { 1593 disable_mu_mimo = true; 1594 break; 1595 } 1596 } 1597 if (disable_mu_mimo) 1598 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1599 else 1600 mu_mimo_owner = true; 1601 } 1602 1603 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1604 1605 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1606 our_bf_sts = cap & mask; 1607 1608 if (ap_bf_sts < our_bf_sts) { 1609 cap &= ~mask; 1610 cap |= ap_bf_sts; 1611 } 1612 1613 /* reserve and fill IE */ 1614 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1615 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1616 1617 return mu_mimo_owner; 1618 } 1619 1620 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1621 struct sk_buff *skb, 1622 enum nl80211_chan_width width, 1623 struct ieee80211_supported_band *sband, 1624 struct ieee80211_mgd_assoc_data *assoc_data) 1625 { 1626 u32 rates; 1627 1628 if (assoc_data->supp_rates_len && 1629 !ieee80211_hw_check(&local->hw, STRICT)) { 1630 /* 1631 * Get all rates supported by the device and the AP as 1632 * some APs don't like getting a superset of their rates 1633 * in the association request (e.g. D-Link DAP 1353 in 1634 * b-only mode)... 1635 */ 1636 ieee80211_parse_bitrates(sband, 1637 assoc_data->supp_rates, 1638 assoc_data->supp_rates_len, 1639 &rates); 1640 } else { 1641 /* 1642 * In case AP not provide any supported rates information 1643 * before association, we send information element(s) with 1644 * all rates that we support. 1645 */ 1646 rates = ~0; 1647 } 1648 1649 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1650 WLAN_EID_SUPP_RATES); 1651 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1652 WLAN_EID_EXT_SUPP_RATES); 1653 } 1654 1655 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1656 const u8 *elems, 1657 size_t elems_len, 1658 size_t offset) 1659 { 1660 size_t noffset; 1661 1662 static const u8 before_ht[] = { 1663 WLAN_EID_SSID, 1664 WLAN_EID_SUPP_RATES, 1665 WLAN_EID_EXT_SUPP_RATES, 1666 WLAN_EID_PWR_CAPABILITY, 1667 WLAN_EID_SUPPORTED_CHANNELS, 1668 WLAN_EID_RSN, 1669 WLAN_EID_QOS_CAPA, 1670 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1671 WLAN_EID_MOBILITY_DOMAIN, 1672 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1673 WLAN_EID_RIC_DATA, /* reassoc only */ 1674 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1675 }; 1676 static const u8 after_ric[] = { 1677 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1678 WLAN_EID_HT_CAPABILITY, 1679 WLAN_EID_BSS_COEX_2040, 1680 /* luckily this is almost always there */ 1681 WLAN_EID_EXT_CAPABILITY, 1682 WLAN_EID_QOS_TRAFFIC_CAPA, 1683 WLAN_EID_TIM_BCAST_REQ, 1684 WLAN_EID_INTERWORKING, 1685 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1686 WLAN_EID_VHT_CAPABILITY, 1687 WLAN_EID_OPMODE_NOTIF, 1688 }; 1689 1690 if (!elems_len) 1691 return offset; 1692 1693 noffset = ieee80211_ie_split_ric(elems, elems_len, 1694 before_ht, 1695 ARRAY_SIZE(before_ht), 1696 after_ric, 1697 ARRAY_SIZE(after_ric), 1698 offset); 1699 skb_put_data(skb, elems + offset, noffset - offset); 1700 1701 return noffset; 1702 } 1703 1704 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1705 const u8 *elems, 1706 size_t elems_len, 1707 size_t offset) 1708 { 1709 static const u8 before_vht[] = { 1710 /* 1711 * no need to list the ones split off before HT 1712 * or generated here 1713 */ 1714 WLAN_EID_BSS_COEX_2040, 1715 WLAN_EID_EXT_CAPABILITY, 1716 WLAN_EID_QOS_TRAFFIC_CAPA, 1717 WLAN_EID_TIM_BCAST_REQ, 1718 WLAN_EID_INTERWORKING, 1719 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1720 }; 1721 size_t noffset; 1722 1723 if (!elems_len) 1724 return offset; 1725 1726 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1727 noffset = ieee80211_ie_split(elems, elems_len, 1728 before_vht, ARRAY_SIZE(before_vht), 1729 offset); 1730 skb_put_data(skb, elems + offset, noffset - offset); 1731 1732 return noffset; 1733 } 1734 1735 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1736 const u8 *elems, 1737 size_t elems_len, 1738 size_t offset) 1739 { 1740 static const u8 before_he[] = { 1741 /* 1742 * no need to list the ones split off before VHT 1743 * or generated here 1744 */ 1745 WLAN_EID_OPMODE_NOTIF, 1746 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1747 /* 11ai elements */ 1748 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1749 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1750 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1751 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1752 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1753 /* TODO: add 11ah/11aj/11ak elements */ 1754 }; 1755 size_t noffset; 1756 1757 if (!elems_len) 1758 return offset; 1759 1760 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1761 noffset = ieee80211_ie_split(elems, elems_len, 1762 before_he, ARRAY_SIZE(before_he), 1763 offset); 1764 skb_put_data(skb, elems + offset, noffset - offset); 1765 1766 return noffset; 1767 } 1768 1769 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1770 const u8 *elems, size_t elems_len, 1771 size_t offset) 1772 { 1773 static const u8 before_reg_conn[] = { 1774 /* 1775 * no need to list the ones split off before HE 1776 * or generated here 1777 */ 1778 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1779 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1780 }; 1781 size_t noffset; 1782 1783 if (!elems_len) 1784 return offset; 1785 1786 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1787 ARRAY_SIZE(before_reg_conn), offset); 1788 skb_put_data(skb, elems + offset, noffset - offset); 1789 1790 return noffset; 1791 } 1792 1793 #define PRESENT_ELEMS_MAX 8 1794 #define PRESENT_ELEM_EXT_OFFS 0x100 1795 1796 static void 1797 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1798 struct sk_buff *skb, u16 capab, 1799 const struct element *ext_capa, 1800 const u16 *present_elems, 1801 struct ieee80211_mgd_assoc_data *assoc_data); 1802 1803 static size_t 1804 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1805 struct sk_buff *skb, u16 *capab, 1806 const struct element *ext_capa, 1807 const u8 *extra_elems, 1808 size_t extra_elems_len, 1809 unsigned int link_id, 1810 struct ieee80211_link_data *link, 1811 u16 *present_elems, 1812 struct ieee80211_mgd_assoc_data *assoc_data) 1813 { 1814 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1815 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1816 struct ieee80211_channel *chan = cbss->channel; 1817 const struct ieee80211_sband_iftype_data *iftd; 1818 struct ieee80211_local *local = sdata->local; 1819 struct ieee80211_supported_band *sband; 1820 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1821 struct ieee80211_chanctx_conf *chanctx_conf; 1822 enum ieee80211_smps_mode smps_mode; 1823 u16 orig_capab = *capab; 1824 size_t offset = 0; 1825 int present_elems_len = 0; 1826 u8 *pos; 1827 int i; 1828 1829 #define ADD_PRESENT_ELEM(id) do { \ 1830 /* need a last for termination - we use 0 == SSID */ \ 1831 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1832 present_elems[present_elems_len++] = (id); \ 1833 } while (0) 1834 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1835 1836 if (link) 1837 smps_mode = link->smps_mode; 1838 else if (sdata->u.mgd.powersave) 1839 smps_mode = IEEE80211_SMPS_DYNAMIC; 1840 else 1841 smps_mode = IEEE80211_SMPS_OFF; 1842 1843 if (link) { 1844 /* 1845 * 5/10 MHz scenarios are only viable without MLO, in which 1846 * case this pointer should be used ... All of this is a bit 1847 * unclear though, not sure this even works at all. 1848 */ 1849 rcu_read_lock(); 1850 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1851 if (chanctx_conf) 1852 width = chanctx_conf->def.width; 1853 rcu_read_unlock(); 1854 } 1855 1856 sband = local->hw.wiphy->bands[chan->band]; 1857 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1858 1859 if (sband->band == NL80211_BAND_2GHZ) { 1860 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1861 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1862 } 1863 1864 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1865 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1866 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1867 1868 if (sband->band != NL80211_BAND_S1GHZ) 1869 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1870 1871 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1872 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1873 struct cfg80211_chan_def chandef = { 1874 .width = width, 1875 .chan = chan, 1876 }; 1877 1878 pos = skb_put(skb, 4); 1879 *pos++ = WLAN_EID_PWR_CAPABILITY; 1880 *pos++ = 2; 1881 *pos++ = 0; /* min tx power */ 1882 /* max tx power */ 1883 *pos++ = ieee80211_chandef_max_power(&chandef); 1884 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1885 } 1886 1887 /* 1888 * Per spec, we shouldn't include the list of channels if we advertise 1889 * support for extended channel switching, but we've always done that; 1890 * (for now?) apply this restriction only on the (new) 6 GHz band. 1891 */ 1892 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1893 (sband->band != NL80211_BAND_6GHZ || 1894 !ext_capa || ext_capa->datalen < 1 || 1895 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1896 /* TODO: get this in reg domain format */ 1897 pos = skb_put(skb, 2 * sband->n_channels + 2); 1898 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1899 *pos++ = 2 * sband->n_channels; 1900 for (i = 0; i < sband->n_channels; i++) { 1901 int cf = sband->channels[i].center_freq; 1902 1903 *pos++ = ieee80211_frequency_to_channel(cf); 1904 *pos++ = 1; /* one channel in the subband*/ 1905 } 1906 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1907 } 1908 1909 /* if present, add any custom IEs that go before HT */ 1910 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1911 extra_elems_len, 1912 offset); 1913 1914 if (sband->band != NL80211_BAND_6GHZ && 1915 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1916 ieee80211_add_ht_ie(sdata, skb, 1917 assoc_data->link[link_id].ap_ht_param, 1918 sband, chan, smps_mode, 1919 &assoc_data->link[link_id].conn); 1920 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1921 } 1922 1923 /* if present, add any custom IEs that go before VHT */ 1924 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1925 extra_elems_len, 1926 offset); 1927 1928 if (sband->band != NL80211_BAND_6GHZ && 1929 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1930 sband->vht_cap.vht_supported) { 1931 bool mu_mimo_owner = 1932 ieee80211_add_vht_ie(sdata, skb, sband, 1933 &assoc_data->link[link_id].ap_vht_cap, 1934 &assoc_data->link[link_id].conn); 1935 1936 if (link) 1937 link->conf->mu_mimo_owner = mu_mimo_owner; 1938 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1939 } 1940 1941 /* if present, add any custom IEs that go before HE */ 1942 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1943 extra_elems_len, 1944 offset); 1945 1946 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1947 ieee80211_put_he_cap(skb, sdata, sband, 1948 &assoc_data->link[link_id].conn); 1949 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1950 if (sband->band == NL80211_BAND_6GHZ) 1951 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1952 } 1953 1954 /* 1955 * if present, add any custom IEs that go before regulatory 1956 * connectivity element 1957 */ 1958 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1959 extra_elems_len, offset); 1960 1961 if (sband->band == NL80211_BAND_6GHZ) { 1962 /* 1963 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1964 * capable of operating on the 6 GHz band shall transmit 1965 * regulatory connectivity element. 1966 */ 1967 ieee80211_put_reg_conn(skb, chan->flags); 1968 } 1969 1970 /* 1971 * careful - need to know about all the present elems before 1972 * calling ieee80211_assoc_add_ml_elem(), so add these if 1973 * we're going to put them after the ML element 1974 */ 1975 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1976 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1977 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 1978 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_UHR_CAPA); 1979 1980 if (link_id == assoc_data->assoc_link_id) 1981 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1982 present_elems, assoc_data); 1983 1984 /* crash if somebody gets it wrong */ 1985 present_elems = NULL; 1986 1987 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1988 ieee80211_put_eht_cap(skb, sdata, sband, 1989 &assoc_data->link[link_id].conn); 1990 1991 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 1992 ieee80211_put_uhr_cap(skb, sdata, sband); 1993 1994 if (sband->band == NL80211_BAND_S1GHZ) { 1995 ieee80211_add_aid_request_ie(sdata, skb); 1996 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1997 } 1998 1999 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 2000 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 2001 2002 return offset; 2003 } 2004 2005 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 2006 const u16 *outer, 2007 const u16 *inner) 2008 { 2009 unsigned int skb_len = skb->len; 2010 bool at_extension = false; 2011 bool added = false; 2012 int i, j; 2013 u8 *len, *list_len = NULL; 2014 2015 skb_put_u8(skb, WLAN_EID_EXTENSION); 2016 len = skb_put(skb, 1); 2017 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 2018 2019 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 2020 u16 elem = outer[i]; 2021 bool have_inner = false; 2022 2023 /* should at least be sorted in the sense of normal -> ext */ 2024 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 2025 2026 /* switch to extension list */ 2027 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 2028 at_extension = true; 2029 if (!list_len) 2030 skb_put_u8(skb, 0); 2031 list_len = NULL; 2032 } 2033 2034 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 2035 if (elem == inner[j]) { 2036 have_inner = true; 2037 break; 2038 } 2039 } 2040 2041 if (have_inner) 2042 continue; 2043 2044 if (!list_len) { 2045 list_len = skb_put(skb, 1); 2046 *list_len = 0; 2047 } 2048 *list_len += 1; 2049 skb_put_u8(skb, (u8)elem); 2050 added = true; 2051 } 2052 2053 /* if we added a list but no extension list, make a zero-len one */ 2054 if (added && (!at_extension || !list_len)) 2055 skb_put_u8(skb, 0); 2056 2057 /* if nothing added remove extension element completely */ 2058 if (!added) 2059 skb_trim(skb, skb_len); 2060 else 2061 *len = skb->len - skb_len - 2; 2062 } 2063 2064 static void 2065 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2066 struct sk_buff *skb, u16 capab, 2067 const struct element *ext_capa, 2068 const u16 *outer_present_elems, 2069 struct ieee80211_mgd_assoc_data *assoc_data) 2070 { 2071 struct ieee80211_local *local = sdata->local; 2072 struct ieee80211_multi_link_elem *ml_elem; 2073 struct ieee80211_mle_basic_common_info *common; 2074 const struct wiphy_iftype_ext_capab *ift_ext_capa; 2075 __le16 eml_capa = 0, mld_capa_ops = 0; 2076 unsigned int link_id; 2077 u8 *ml_elem_len; 2078 void *capab_pos; 2079 2080 if (!ieee80211_vif_is_mld(&sdata->vif)) 2081 return; 2082 2083 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 2084 ieee80211_vif_type_p2p(&sdata->vif)); 2085 if (ift_ext_capa) { 2086 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 2087 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 2088 } 2089 2090 skb_put_u8(skb, WLAN_EID_EXTENSION); 2091 ml_elem_len = skb_put(skb, 1); 2092 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2093 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2094 ml_elem->control = 2095 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2096 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2097 common = skb_put(skb, sizeof(*common)); 2098 common->len = sizeof(*common) + 2099 2; /* MLD capa/ops */ 2100 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2101 2102 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2103 if (eml_capa & 2104 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2105 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2106 common->len += 2; /* EML capabilities */ 2107 ml_elem->control |= 2108 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2109 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2110 } 2111 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2112 2113 if (assoc_data->ext_mld_capa_ops) { 2114 ml_elem->control |= 2115 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2116 common->len += 2; 2117 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2118 sizeof(assoc_data->ext_mld_capa_ops)); 2119 } 2120 2121 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2122 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2123 const u8 *extra_elems; 2124 size_t extra_elems_len; 2125 size_t extra_used; 2126 u8 *subelem_len = NULL; 2127 __le16 ctrl; 2128 2129 if (!assoc_data->link[link_id].bss || 2130 link_id == assoc_data->assoc_link_id) 2131 continue; 2132 2133 extra_elems = assoc_data->link[link_id].elems; 2134 extra_elems_len = assoc_data->link[link_id].elems_len; 2135 2136 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2137 subelem_len = skb_put(skb, 1); 2138 2139 ctrl = cpu_to_le16(link_id | 2140 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2141 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2142 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2143 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2144 skb_put_data(skb, assoc_data->link[link_id].addr, 2145 ETH_ALEN); 2146 /* 2147 * Now add the contents of the (re)association request, 2148 * but the "listen interval" and "current AP address" 2149 * (if applicable) are skipped. So we only have 2150 * the capability field (remember the position and fill 2151 * later), followed by the elements added below by 2152 * calling ieee80211_add_link_elems(). 2153 */ 2154 capab_pos = skb_put(skb, 2); 2155 2156 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2157 ext_capa, 2158 extra_elems, 2159 extra_elems_len, 2160 link_id, NULL, 2161 link_present_elems, 2162 assoc_data); 2163 if (extra_elems) 2164 skb_put_data(skb, extra_elems + extra_used, 2165 extra_elems_len - extra_used); 2166 2167 put_unaligned_le16(capab, capab_pos); 2168 2169 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2170 link_present_elems); 2171 2172 ieee80211_fragment_element(skb, subelem_len, 2173 IEEE80211_MLE_SUBELEM_FRAGMENT); 2174 } 2175 2176 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2177 } 2178 2179 static int 2180 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2181 enum nl80211_iftype iftype, 2182 struct cfg80211_bss *cbss, 2183 size_t elems_len) 2184 { 2185 struct ieee80211_local *local = sdata->local; 2186 const struct ieee80211_sband_iftype_data *iftd; 2187 struct ieee80211_supported_band *sband; 2188 size_t size = 0; 2189 2190 if (!cbss) 2191 return size; 2192 2193 sband = local->hw.wiphy->bands[cbss->channel->band]; 2194 2195 /* add STA profile elements length */ 2196 size += elems_len; 2197 2198 /* and supported rates length */ 2199 size += 4 + sband->n_bitrates; 2200 2201 /* supported channels */ 2202 size += 2 + 2 * sband->n_channels; 2203 2204 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2205 if (iftd) 2206 size += iftd->vendor_elems.len; 2207 2208 /* power capability */ 2209 size += 4; 2210 2211 /* HT, VHT, HE, EHT */ 2212 size += 2 + sizeof(struct ieee80211_ht_cap); 2213 size += 2 + sizeof(struct ieee80211_vht_cap); 2214 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2215 sizeof(struct ieee80211_he_mcs_nss_supp) + 2216 IEEE80211_HE_PPE_THRES_MAX_LEN; 2217 2218 if (sband->band == NL80211_BAND_6GHZ) { 2219 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2220 /* reg connection */ 2221 size += 4; 2222 } 2223 2224 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2225 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2226 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2227 2228 size += 2 + 1 + sizeof(struct ieee80211_uhr_cap) + 2229 sizeof(struct ieee80211_uhr_cap_phy); 2230 2231 return size; 2232 } 2233 2234 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2235 { 2236 struct ieee80211_local *local = sdata->local; 2237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2238 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2239 struct ieee80211_link_data *link; 2240 struct sk_buff *skb; 2241 struct ieee80211_mgmt *mgmt; 2242 u8 *pos, qos_info, *ie_start; 2243 size_t offset, noffset; 2244 u16 capab = 0, link_capab; 2245 __le16 listen_int; 2246 struct element *ext_capa = NULL; 2247 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2248 struct ieee80211_prep_tx_info info = {}; 2249 unsigned int link_id, n_links = 0; 2250 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2251 struct sta_info *sta; 2252 bool assoc_encrypt; 2253 void *capab_pos; 2254 size_t size; 2255 int ret; 2256 2257 /* we know it's writable, cast away the const */ 2258 if (assoc_data->ie_len) 2259 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2260 assoc_data->ie, 2261 assoc_data->ie_len); 2262 2263 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2264 2265 size = local->hw.extra_tx_headroom + 2266 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2267 2 + assoc_data->ssid_len + /* SSID */ 2268 assoc_data->ie_len + /* extra IEs */ 2269 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2270 9; /* WMM */ 2271 2272 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2273 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2274 size_t elems_len = assoc_data->link[link_id].elems_len; 2275 2276 if (!cbss) 2277 continue; 2278 2279 n_links++; 2280 2281 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2282 elems_len); 2283 2284 /* non-inheritance element */ 2285 size += 2 + 2 + PRESENT_ELEMS_MAX; 2286 2287 /* should be the same across all BSSes */ 2288 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2289 capab |= WLAN_CAPABILITY_PRIVACY; 2290 } 2291 2292 if (ieee80211_vif_is_mld(&sdata->vif)) { 2293 /* consider the multi-link element with STA profile */ 2294 size += sizeof(struct ieee80211_multi_link_elem); 2295 /* max common info field in basic multi-link element */ 2296 size += sizeof(struct ieee80211_mle_basic_common_info) + 2297 2 + /* capa & op */ 2298 2 + /* ext capa & op */ 2299 2; /* EML capa */ 2300 2301 /* The capability elements were already considered above */ 2302 size += (n_links - 1) * 2303 (1 + 1 + /* subelement ID/length */ 2304 2 + /* STA control */ 2305 1 + ETH_ALEN + 2 /* STA Info field */); 2306 } 2307 2308 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2309 if (WARN_ON(!link)) 2310 return -EINVAL; 2311 2312 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2313 return -EINVAL; 2314 2315 skb = alloc_skb(size, GFP_KERNEL); 2316 if (!skb) 2317 return -ENOMEM; 2318 2319 skb_reserve(skb, local->hw.extra_tx_headroom); 2320 2321 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2322 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2323 2324 /* Set MBSSID support for HE AP if needed */ 2325 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2326 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2327 ext_capa && ext_capa->datalen >= 3) 2328 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2329 2330 mgmt = skb_put_zero(skb, 24); 2331 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2332 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2333 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2334 2335 listen_int = cpu_to_le16(assoc_data->s1g ? 2336 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2337 local->hw.conf.listen_interval); 2338 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2339 skb_put(skb, 10); 2340 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2341 IEEE80211_STYPE_REASSOC_REQ); 2342 capab_pos = &mgmt->u.reassoc_req.capab_info; 2343 mgmt->u.reassoc_req.listen_interval = listen_int; 2344 memcpy(mgmt->u.reassoc_req.current_ap, 2345 assoc_data->prev_ap_addr, ETH_ALEN); 2346 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2347 } else { 2348 skb_put(skb, 4); 2349 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2350 IEEE80211_STYPE_ASSOC_REQ); 2351 capab_pos = &mgmt->u.assoc_req.capab_info; 2352 mgmt->u.assoc_req.listen_interval = listen_int; 2353 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2354 } 2355 2356 /* SSID */ 2357 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2358 ie_start = pos; 2359 *pos++ = WLAN_EID_SSID; 2360 *pos++ = assoc_data->ssid_len; 2361 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2362 2363 /* 2364 * This bit is technically reserved, so it shouldn't matter for either 2365 * the AP or us, but it also means we shouldn't set it. However, we've 2366 * always set it in the past, and apparently some EHT APs check that 2367 * we don't set it. To avoid interoperability issues with old APs that 2368 * for some reason check it and want it to be set, set the bit for all 2369 * pre-EHT connections as we used to do. 2370 */ 2371 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2372 !ieee80211_hw_check(&local->hw, STRICT)) 2373 capab |= WLAN_CAPABILITY_ESS; 2374 2375 /* add the elements for the assoc (main) link */ 2376 link_capab = capab; 2377 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2378 ext_capa, 2379 assoc_data->ie, 2380 assoc_data->ie_len, 2381 assoc_data->assoc_link_id, link, 2382 present_elems, assoc_data); 2383 put_unaligned_le16(link_capab, capab_pos); 2384 2385 /* if present, add any custom non-vendor IEs */ 2386 if (assoc_data->ie_len) { 2387 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2388 assoc_data->ie_len, 2389 offset); 2390 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2391 offset = noffset; 2392 } 2393 2394 if (assoc_data->wmm) { 2395 if (assoc_data->uapsd) { 2396 qos_info = ifmgd->uapsd_queues; 2397 qos_info |= (ifmgd->uapsd_max_sp_len << 2398 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2399 } else { 2400 qos_info = 0; 2401 } 2402 2403 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2404 } 2405 2406 /* add any remaining custom (i.e. vendor specific here) IEs */ 2407 if (assoc_data->ie_len) { 2408 noffset = assoc_data->ie_len; 2409 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2410 } 2411 2412 if (assoc_data->fils_kek_len) { 2413 ret = fils_encrypt_assoc_req(skb, assoc_data); 2414 if (ret < 0) { 2415 dev_kfree_skb(skb); 2416 return ret; 2417 } 2418 } 2419 2420 pos = skb_tail_pointer(skb); 2421 kfree(ifmgd->assoc_req_ies); 2422 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2423 if (!ifmgd->assoc_req_ies) { 2424 dev_kfree_skb(skb); 2425 return -ENOMEM; 2426 } 2427 2428 ifmgd->assoc_req_ies_len = pos - ie_start; 2429 2430 info.link_id = assoc_data->assoc_link_id; 2431 drv_mgd_prepare_tx(local, sdata, &info); 2432 2433 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 2434 2435 assoc_encrypt = sta && sta->sta.epp_peer && 2436 wiphy_dereference(sdata->local->hw.wiphy, 2437 sta->ptk[sta->ptk_idx]); 2438 2439 if (!assoc_encrypt) 2440 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2441 2442 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2443 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2444 IEEE80211_TX_INTFL_MLME_CONN_TX; 2445 ieee80211_tx_skb(sdata, skb); 2446 2447 return 0; 2448 } 2449 2450 void ieee80211_send_pspoll(struct ieee80211_local *local, 2451 struct ieee80211_sub_if_data *sdata) 2452 { 2453 struct ieee80211_pspoll *pspoll; 2454 struct sk_buff *skb; 2455 2456 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2457 if (!skb) 2458 return; 2459 2460 pspoll = (struct ieee80211_pspoll *) skb->data; 2461 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2462 2463 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2464 ieee80211_tx_skb(sdata, skb); 2465 } 2466 2467 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2468 struct ieee80211_sub_if_data *sdata, 2469 bool powersave) 2470 { 2471 struct sk_buff *skb; 2472 struct ieee80211_hdr_3addr *nullfunc; 2473 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2474 2475 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2476 !ieee80211_hw_check(&local->hw, 2477 DOESNT_SUPPORT_QOS_NDP)); 2478 if (!skb) 2479 return; 2480 2481 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2482 if (powersave) 2483 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2484 2485 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2486 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2487 2488 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2489 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2490 2491 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2492 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2493 2494 ieee80211_tx_skb(sdata, skb); 2495 } 2496 2497 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2498 struct ieee80211_sub_if_data *sdata) 2499 { 2500 struct sk_buff *skb; 2501 struct ieee80211_hdr *nullfunc; 2502 __le16 fc; 2503 2504 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2505 return; 2506 2507 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2508 if (!skb) 2509 return; 2510 2511 skb_reserve(skb, local->hw.extra_tx_headroom); 2512 2513 nullfunc = skb_put_zero(skb, 30); 2514 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2515 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2516 nullfunc->frame_control = fc; 2517 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2518 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2519 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2520 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2521 2522 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2523 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2524 ieee80211_tx_skb(sdata, skb); 2525 } 2526 2527 /* spectrum management related things */ 2528 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2529 struct wiphy_work *work) 2530 { 2531 struct ieee80211_link_data *link = 2532 container_of(work, struct ieee80211_link_data, 2533 u.mgd.csa.switch_work.work); 2534 struct ieee80211_sub_if_data *sdata = link->sdata; 2535 struct ieee80211_local *local = sdata->local; 2536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2537 int ret; 2538 2539 if (!ieee80211_sdata_running(sdata)) 2540 return; 2541 2542 lockdep_assert_wiphy(local->hw.wiphy); 2543 2544 if (!ifmgd->associated) 2545 return; 2546 2547 if (!link->conf->csa_active) 2548 return; 2549 2550 /* 2551 * If the link isn't active (now), we cannot wait for beacons, won't 2552 * have a reserved chanctx, etc. Just switch over the chandef and 2553 * update cfg80211 directly. 2554 */ 2555 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2556 struct link_sta_info *link_sta; 2557 struct sta_info *ap_sta; 2558 2559 link->conf->chanreq = link->csa.chanreq; 2560 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2561 link->link_id); 2562 link->conf->csa_active = false; 2563 2564 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2565 if (WARN_ON(!ap_sta)) 2566 return; 2567 2568 link_sta = wiphy_dereference(wiphy, 2569 ap_sta->link[link->link_id]); 2570 if (WARN_ON(!link_sta)) 2571 return; 2572 2573 link_sta->pub->bandwidth = 2574 _ieee80211_sta_cur_vht_bw(link_sta, 2575 &link->csa.chanreq.oper); 2576 return; 2577 } 2578 2579 /* 2580 * using reservation isn't immediate as it may be deferred until later 2581 * with multi-vif. once reservation is complete it will re-schedule the 2582 * work with no reserved_chanctx so verify chandef to check if it 2583 * completed successfully 2584 */ 2585 2586 if (link->reserved_chanctx) { 2587 /* 2588 * with multi-vif csa driver may call ieee80211_csa_finish() 2589 * many times while waiting for other interfaces to use their 2590 * reservations 2591 */ 2592 if (link->reserved_ready) 2593 return; 2594 2595 ret = ieee80211_link_use_reserved_context(link); 2596 if (ret) { 2597 link_info(link, 2598 "failed to use reserved channel context, disconnecting (err=%d)\n", 2599 ret); 2600 wiphy_work_queue(sdata->local->hw.wiphy, 2601 &ifmgd->csa_connection_drop_work); 2602 } 2603 return; 2604 } 2605 2606 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2607 &link->csa.chanreq)) { 2608 link_info(link, 2609 "failed to finalize channel switch, disconnecting\n"); 2610 wiphy_work_queue(sdata->local->hw.wiphy, 2611 &ifmgd->csa_connection_drop_work); 2612 return; 2613 } 2614 2615 link->u.mgd.csa.waiting_bcn = true; 2616 2617 /* 2618 * The next beacon really should always be different, so this should 2619 * have no effect whatsoever. However, some APs (we observed this in 2620 * an Asus AXE11000), the beacon after the CSA might be identical to 2621 * the last beacon on the old channel - in this case we'd ignore it. 2622 * Resetting the CRC will lead us to handle it better (albeit with a 2623 * disconnect, but clearly the AP is broken.) 2624 */ 2625 link->u.mgd.beacon_crc_valid = false; 2626 2627 /* apply new TPE restrictions immediately on the new channel */ 2628 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2629 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2630 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2631 &link->u.mgd.csa.ap_chandef, 2632 &link->conf->chanreq.oper); 2633 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2634 sizeof(link->u.mgd.csa.tpe))) { 2635 link->conf->tpe = link->u.mgd.csa.tpe; 2636 ieee80211_link_info_change_notify(sdata, link, 2637 BSS_CHANGED_TPE); 2638 } 2639 } 2640 2641 /* 2642 * It is not necessary to reset these timers if any link does not 2643 * have an active CSA and that link still receives the beacons 2644 * when other links have active CSA. 2645 */ 2646 for_each_link_data(sdata, link) { 2647 if (!link->conf->csa_active) 2648 return; 2649 } 2650 2651 /* 2652 * Reset the beacon monitor and connection monitor timers when CSA 2653 * is active for all links in MLO when channel switch occurs in all 2654 * the links. 2655 */ 2656 ieee80211_sta_reset_beacon_monitor(sdata); 2657 ieee80211_sta_reset_conn_monitor(sdata); 2658 } 2659 2660 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2661 { 2662 struct ieee80211_sub_if_data *sdata = link->sdata; 2663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2664 int ret; 2665 2666 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2667 2668 WARN_ON(!link->conf->csa_active); 2669 2670 ieee80211_vif_unblock_queues_csa(sdata); 2671 2672 link->conf->csa_active = false; 2673 link->u.mgd.csa.blocked_tx = false; 2674 link->u.mgd.csa.waiting_bcn = false; 2675 2676 ret = drv_post_channel_switch(link); 2677 if (ret) { 2678 link_info(link, 2679 "driver post channel switch failed, disconnecting\n"); 2680 wiphy_work_queue(sdata->local->hw.wiphy, 2681 &ifmgd->csa_connection_drop_work); 2682 return; 2683 } 2684 2685 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2686 link->link_id); 2687 } 2688 2689 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2690 unsigned int link_id) 2691 { 2692 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2693 2694 trace_api_chswitch_done(sdata, success, link_id); 2695 2696 rcu_read_lock(); 2697 2698 if (!success) { 2699 sdata_info(sdata, 2700 "driver channel switch failed (link %d), disconnecting\n", 2701 link_id); 2702 wiphy_work_queue(sdata->local->hw.wiphy, 2703 &sdata->u.mgd.csa_connection_drop_work); 2704 } else { 2705 struct ieee80211_link_data *link = 2706 rcu_dereference(sdata->link[link_id]); 2707 2708 if (WARN_ON(!link)) { 2709 rcu_read_unlock(); 2710 return; 2711 } 2712 2713 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2714 &link->u.mgd.csa.switch_work, 0); 2715 } 2716 2717 rcu_read_unlock(); 2718 } 2719 EXPORT_SYMBOL(ieee80211_chswitch_done); 2720 2721 static void 2722 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2723 { 2724 struct ieee80211_sub_if_data *sdata = link->sdata; 2725 struct ieee80211_local *local = sdata->local; 2726 2727 lockdep_assert_wiphy(local->hw.wiphy); 2728 2729 if (!local->ops->abort_channel_switch) 2730 return; 2731 2732 if (rcu_access_pointer(link->conf->chanctx_conf)) 2733 ieee80211_link_unreserve_chanctx(link); 2734 2735 ieee80211_vif_unblock_queues_csa(sdata); 2736 2737 link->conf->csa_active = false; 2738 link->u.mgd.csa.blocked_tx = false; 2739 2740 drv_abort_channel_switch(link); 2741 } 2742 2743 struct sta_csa_rnr_iter_data { 2744 struct ieee80211_link_data *link; 2745 struct ieee80211_channel *chan; 2746 u8 mld_id; 2747 }; 2748 2749 static enum cfg80211_rnr_iter_ret 2750 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2751 const struct ieee80211_neighbor_ap_info *info, 2752 const u8 *tbtt_info, u8 tbtt_info_len) 2753 { 2754 struct sta_csa_rnr_iter_data *data = _data; 2755 struct ieee80211_link_data *link = data->link; 2756 struct ieee80211_sub_if_data *sdata = link->sdata; 2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2758 const struct ieee80211_tbtt_info_ge_11 *ti; 2759 enum nl80211_band band; 2760 unsigned int center_freq; 2761 int link_id; 2762 2763 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2764 return RNR_ITER_CONTINUE; 2765 2766 if (tbtt_info_len < sizeof(*ti)) 2767 return RNR_ITER_CONTINUE; 2768 2769 ti = (const void *)tbtt_info; 2770 2771 if (ti->mld_params.mld_id != data->mld_id) 2772 return RNR_ITER_CONTINUE; 2773 2774 link_id = le16_get_bits(ti->mld_params.params, 2775 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2776 if (link_id != data->link->link_id) 2777 return RNR_ITER_CONTINUE; 2778 2779 /* we found the entry for our link! */ 2780 2781 /* this AP is confused, it had this right before ... just disconnect */ 2782 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2783 link_info(link, 2784 "AP now has invalid operating class in RNR, disconnect\n"); 2785 wiphy_work_queue(sdata->local->hw.wiphy, 2786 &ifmgd->csa_connection_drop_work); 2787 return RNR_ITER_BREAK; 2788 } 2789 2790 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2791 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2792 2793 return RNR_ITER_BREAK; 2794 } 2795 2796 static void 2797 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2798 struct ieee802_11_elems *elems) 2799 { 2800 struct ieee80211_sub_if_data *sdata = link->sdata; 2801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2802 struct sta_csa_rnr_iter_data data = { 2803 .link = link, 2804 }; 2805 2806 /* 2807 * If we get here, we see a beacon from another link without 2808 * CSA still being reported for it, so now we have to check 2809 * if the CSA was aborted or completed. This may not even be 2810 * perfectly possible if the CSA was only done for changing 2811 * the puncturing, but in that case if the link in inactive 2812 * we don't really care, and if it's an active link (or when 2813 * it's activated later) we'll get a beacon and adjust. 2814 */ 2815 2816 if (WARN_ON(!elems->ml_basic)) 2817 return; 2818 2819 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2820 2821 /* 2822 * So in order to do this, iterate the RNR element(s) and see 2823 * what channel is reported now. 2824 */ 2825 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2826 ieee80211_sta_csa_rnr_iter, &data); 2827 2828 if (!data.chan) { 2829 link_info(link, 2830 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2831 wiphy_work_queue(sdata->local->hw.wiphy, 2832 &ifmgd->csa_connection_drop_work); 2833 return; 2834 } 2835 2836 /* 2837 * If it doesn't match the CSA, then assume it aborted. This 2838 * may erroneously detect that it was _not_ aborted when it 2839 * was in fact aborted, but only changed the bandwidth or the 2840 * puncturing configuration, but we don't have enough data to 2841 * detect that. 2842 */ 2843 if (data.chan != link->csa.chanreq.oper.chan) 2844 ieee80211_sta_abort_chanswitch(link); 2845 } 2846 2847 enum ieee80211_csa_source { 2848 IEEE80211_CSA_SOURCE_BEACON, 2849 IEEE80211_CSA_SOURCE_OTHER_LINK, 2850 IEEE80211_CSA_SOURCE_PROT_ACTION, 2851 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2852 }; 2853 2854 static void 2855 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2856 u64 timestamp, u32 device_timestamp, 2857 struct ieee802_11_elems *full_elems, 2858 struct ieee802_11_elems *csa_elems, 2859 enum ieee80211_csa_source source) 2860 { 2861 struct ieee80211_sub_if_data *sdata = link->sdata; 2862 struct ieee80211_local *local = sdata->local; 2863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2864 struct ieee80211_chanctx *chanctx = NULL; 2865 struct ieee80211_chanctx_conf *conf; 2866 struct ieee80211_csa_ie csa_ie = {}; 2867 struct ieee80211_channel_switch ch_switch = { 2868 .link_id = link->link_id, 2869 .timestamp = timestamp, 2870 .device_timestamp = device_timestamp, 2871 }; 2872 u32 csa_time_tu; 2873 ktime_t now; 2874 int res; 2875 2876 lockdep_assert_wiphy(local->hw.wiphy); 2877 2878 if (csa_elems) { 2879 struct cfg80211_bss *cbss = link->conf->bss; 2880 enum nl80211_band current_band; 2881 struct ieee80211_bss *bss; 2882 2883 if (WARN_ON(!cbss)) 2884 return; 2885 2886 current_band = cbss->channel->band; 2887 bss = (void *)cbss->priv; 2888 2889 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2890 current_band, 2891 bss->vht_cap_info, 2892 &link->u.mgd.conn, 2893 link->u.mgd.bssid, 2894 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2895 &csa_ie); 2896 if (res == 0) { 2897 ch_switch.block_tx = csa_ie.mode; 2898 ch_switch.chandef = csa_ie.chanreq.oper; 2899 ch_switch.count = csa_ie.count; 2900 ch_switch.delay = csa_ie.max_switch_time; 2901 } 2902 2903 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2904 } else { 2905 /* 2906 * If there was no per-STA profile for this link, we 2907 * get called with csa_elems == NULL. This of course means 2908 * there are no CSA elements, so set res=1 indicating 2909 * no more CSA. 2910 */ 2911 res = 1; 2912 } 2913 2914 if (res < 0) { 2915 /* ignore this case, not a protected frame */ 2916 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2917 return; 2918 goto drop_connection; 2919 } 2920 2921 if (link->conf->csa_active) { 2922 switch (source) { 2923 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2924 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2925 /* already processing - disregard action frames */ 2926 return; 2927 case IEEE80211_CSA_SOURCE_BEACON: 2928 if (link->u.mgd.csa.waiting_bcn) { 2929 ieee80211_chswitch_post_beacon(link); 2930 /* 2931 * If the CSA is still present after the switch 2932 * we need to consider it as a new CSA (possibly 2933 * to self). This happens by not returning here 2934 * so we'll get to the check below. 2935 */ 2936 } else if (res) { 2937 ieee80211_sta_abort_chanswitch(link); 2938 return; 2939 } else { 2940 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2941 return; 2942 } 2943 break; 2944 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2945 /* active link: we want to see the beacon to continue */ 2946 if (ieee80211_vif_link_active(&sdata->vif, 2947 link->link_id)) 2948 return; 2949 2950 /* switch work ran, so just complete the process */ 2951 if (link->u.mgd.csa.waiting_bcn) { 2952 ieee80211_chswitch_post_beacon(link); 2953 /* 2954 * If the CSA is still present after the switch 2955 * we need to consider it as a new CSA (possibly 2956 * to self). This happens by not returning here 2957 * so we'll get to the check below. 2958 */ 2959 break; 2960 } 2961 2962 /* link still has CSA but we already know, do nothing */ 2963 if (!res) 2964 return; 2965 2966 /* check in the RNR if the CSA aborted */ 2967 ieee80211_sta_other_link_csa_disappeared(link, 2968 full_elems); 2969 return; 2970 } 2971 } 2972 2973 /* no active CSA nor a new one */ 2974 if (res) { 2975 /* 2976 * However, we may have stopped queues when receiving a public 2977 * action frame that couldn't be protected, if it had the quiet 2978 * bit set. This is a trade-off, we want to be quiet as soon as 2979 * possible, but also don't trust the public action frame much, 2980 * as it can't be protected. 2981 */ 2982 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2983 link->u.mgd.csa.blocked_tx = false; 2984 ieee80211_vif_unblock_queues_csa(sdata); 2985 } 2986 return; 2987 } 2988 2989 /* 2990 * We don't really trust public action frames, but block queues (go to 2991 * quiet mode) for them anyway, we should get a beacon soon to either 2992 * know what the CSA really is, or figure out the public action frame 2993 * was actually an attack. 2994 */ 2995 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2996 if (csa_ie.mode) { 2997 link->u.mgd.csa.blocked_tx = true; 2998 ieee80211_vif_block_queues_csa(sdata); 2999 } 3000 return; 3001 } 3002 3003 if (link->conf->chanreq.oper.chan->band != 3004 csa_ie.chanreq.oper.chan->band) { 3005 link_info(link, 3006 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 3007 link->u.mgd.bssid, 3008 csa_ie.chanreq.oper.chan->center_freq, 3009 csa_ie.chanreq.oper.width, 3010 csa_ie.chanreq.oper.center_freq1, 3011 csa_ie.chanreq.oper.center_freq2); 3012 goto drop_connection; 3013 } 3014 3015 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 3016 IEEE80211_CHAN_DISABLED)) { 3017 link_info(link, 3018 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 3019 link->u.mgd.bssid, 3020 csa_ie.chanreq.oper.chan->center_freq, 3021 csa_ie.chanreq.oper.chan->freq_offset, 3022 csa_ie.chanreq.oper.width, 3023 csa_ie.chanreq.oper.center_freq1, 3024 csa_ie.chanreq.oper.freq1_offset, 3025 csa_ie.chanreq.oper.center_freq2); 3026 goto drop_connection; 3027 } 3028 3029 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 3030 &link->conf->chanreq.oper) && 3031 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 3032 if (link->u.mgd.csa.ignored_same_chan) 3033 return; 3034 link_info(link, 3035 "AP %pM tries to chanswitch to same channel, ignore\n", 3036 link->u.mgd.bssid); 3037 link->u.mgd.csa.ignored_same_chan = true; 3038 return; 3039 } 3040 3041 /* 3042 * Drop all TDLS peers on the affected link - either we disconnect or 3043 * move to a different channel from this point on. There's no telling 3044 * what our peer will do. 3045 * The TDLS WIDER_BW scenario is also problematic, as peers might now 3046 * have an incompatible wider chandef. 3047 */ 3048 ieee80211_teardown_tdls_peers(link); 3049 3050 conf = rcu_dereference_protected(link->conf->chanctx_conf, 3051 lockdep_is_held(&local->hw.wiphy->mtx)); 3052 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 3053 link_info(link, 3054 "no channel context assigned to vif?, disconnecting\n"); 3055 goto drop_connection; 3056 } 3057 3058 if (conf) 3059 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 3060 3061 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 3062 link_info(link, 3063 "driver doesn't support chan-switch with channel contexts\n"); 3064 goto drop_connection; 3065 } 3066 3067 if (drv_pre_channel_switch(sdata, &ch_switch)) { 3068 link_info(link, 3069 "preparing for channel switch failed, disconnecting\n"); 3070 goto drop_connection; 3071 } 3072 3073 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 3074 3075 link->csa.chanreq.oper = csa_ie.chanreq.oper; 3076 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 3077 &csa_ie.chanreq.ap); 3078 3079 if (chanctx) { 3080 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 3081 chanctx->mode, false); 3082 if (res) { 3083 link_info(link, 3084 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 3085 res); 3086 goto drop_connection; 3087 } 3088 } 3089 3090 link->conf->csa_active = true; 3091 link->u.mgd.csa.ignored_same_chan = false; 3092 link->u.mgd.beacon_crc_valid = false; 3093 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3094 3095 if (csa_ie.mode) 3096 ieee80211_vif_block_queues_csa(sdata); 3097 3098 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 3099 link->link_id, csa_ie.count, 3100 csa_ie.mode); 3101 3102 /* we may have to handle timeout for deactivated link in software */ 3103 now = ktime_get_boottime(); 3104 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3105 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3106 3107 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3108 local->ops->channel_switch) { 3109 /* 3110 * Use driver's channel switch callback, the driver will 3111 * later call ieee80211_chswitch_done(). It may deactivate 3112 * the link as well, we handle that elsewhere and queue 3113 * the csa.switch_work for the calculated time then. 3114 */ 3115 drv_channel_switch(local, sdata, &ch_switch); 3116 return; 3117 } 3118 3119 /* channel switch handled in software */ 3120 wiphy_hrtimer_work_queue(local->hw.wiphy, 3121 &link->u.mgd.csa.switch_work, 3122 link->u.mgd.csa.time - now); 3123 return; 3124 drop_connection: 3125 /* 3126 * This is just so that the disconnect flow will know that 3127 * we were trying to switch channel and failed. In case the 3128 * mode is 1 (we are not allowed to Tx), we will know not to 3129 * send a deauthentication frame. Those two fields will be 3130 * reset when the disconnection worker runs. 3131 */ 3132 link->conf->csa_active = true; 3133 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3134 3135 wiphy_work_queue(sdata->local->hw.wiphy, 3136 &ifmgd->csa_connection_drop_work); 3137 } 3138 3139 struct sta_bss_param_ch_cnt_data { 3140 struct ieee80211_sub_if_data *sdata; 3141 u8 reporting_link_id; 3142 u8 mld_id; 3143 }; 3144 3145 static enum cfg80211_rnr_iter_ret 3146 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3147 const struct ieee80211_neighbor_ap_info *info, 3148 const u8 *tbtt_info, u8 tbtt_info_len) 3149 { 3150 struct sta_bss_param_ch_cnt_data *data = _data; 3151 struct ieee80211_sub_if_data *sdata = data->sdata; 3152 const struct ieee80211_tbtt_info_ge_11 *ti; 3153 u8 bss_param_ch_cnt; 3154 int link_id; 3155 3156 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3157 return RNR_ITER_CONTINUE; 3158 3159 if (tbtt_info_len < sizeof(*ti)) 3160 return RNR_ITER_CONTINUE; 3161 3162 ti = (const void *)tbtt_info; 3163 3164 if (ti->mld_params.mld_id != data->mld_id) 3165 return RNR_ITER_CONTINUE; 3166 3167 link_id = le16_get_bits(ti->mld_params.params, 3168 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3169 bss_param_ch_cnt = 3170 le16_get_bits(ti->mld_params.params, 3171 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3172 3173 if (bss_param_ch_cnt != 255 && 3174 link_id < ARRAY_SIZE(sdata->link)) { 3175 struct ieee80211_link_data *link = 3176 sdata_dereference(sdata->link[link_id], sdata); 3177 3178 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3179 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3180 link->conf->bss_param_ch_cnt_link_id = 3181 data->reporting_link_id; 3182 } 3183 } 3184 3185 return RNR_ITER_CONTINUE; 3186 } 3187 3188 static void 3189 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3190 struct ieee80211_bss_conf *bss_conf, 3191 struct ieee802_11_elems *elems) 3192 { 3193 struct sta_bss_param_ch_cnt_data data = { 3194 .reporting_link_id = bss_conf->link_id, 3195 .sdata = sdata, 3196 }; 3197 int bss_param_ch_cnt; 3198 3199 if (!elems->ml_basic) 3200 return; 3201 3202 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3203 3204 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3205 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3206 3207 bss_param_ch_cnt = 3208 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3209 3210 /* 3211 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3212 * didn't change to indicate that we got a beacon on our own 3213 * link. 3214 */ 3215 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3216 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3217 bss_conf->bss_param_ch_cnt_link_id = 3218 bss_conf->link_id; 3219 } 3220 } 3221 3222 static bool 3223 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3224 const u8 *country_ie, u8 country_ie_len, 3225 const u8 *pwr_constr_elem, 3226 int *chan_pwr, int *pwr_reduction) 3227 { 3228 struct ieee80211_country_ie_triplet *triplet; 3229 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3230 int i, chan_increment; 3231 bool have_chan_pwr = false; 3232 3233 /* Invalid IE */ 3234 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3235 return false; 3236 3237 triplet = (void *)(country_ie + 3); 3238 country_ie_len -= 3; 3239 3240 switch (channel->band) { 3241 default: 3242 WARN_ON_ONCE(1); 3243 fallthrough; 3244 case NL80211_BAND_2GHZ: 3245 case NL80211_BAND_60GHZ: 3246 case NL80211_BAND_LC: 3247 chan_increment = 1; 3248 break; 3249 case NL80211_BAND_5GHZ: 3250 chan_increment = 4; 3251 break; 3252 case NL80211_BAND_6GHZ: 3253 /* 3254 * In the 6 GHz band, the "maximum transmit power level" 3255 * field in the triplets is reserved, and thus will be 3256 * zero and we shouldn't use it to control TX power. 3257 * The actual TX power will be given in the transmit 3258 * power envelope element instead. 3259 */ 3260 return false; 3261 } 3262 3263 /* find channel */ 3264 while (country_ie_len >= 3) { 3265 u8 first_channel = triplet->chans.first_channel; 3266 3267 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3268 goto next; 3269 3270 for (i = 0; i < triplet->chans.num_channels; i++) { 3271 if (first_channel + i * chan_increment == chan) { 3272 have_chan_pwr = true; 3273 *chan_pwr = triplet->chans.max_power; 3274 break; 3275 } 3276 } 3277 if (have_chan_pwr) 3278 break; 3279 3280 next: 3281 triplet++; 3282 country_ie_len -= 3; 3283 } 3284 3285 if (have_chan_pwr && pwr_constr_elem) 3286 *pwr_reduction = *pwr_constr_elem; 3287 else 3288 *pwr_reduction = 0; 3289 3290 return have_chan_pwr; 3291 } 3292 3293 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3294 const u8 *cisco_dtpc_ie, 3295 int *pwr_level) 3296 { 3297 /* From practical testing, the first data byte of the DTPC element 3298 * seems to contain the requested dBm level, and the CLI on Cisco 3299 * APs clearly state the range is -127 to 127 dBm, which indicates 3300 * a signed byte, although it seemingly never actually goes negative. 3301 * The other byte seems to always be zero. 3302 */ 3303 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3304 } 3305 3306 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3307 struct ieee80211_channel *channel, 3308 struct ieee80211_mgmt *mgmt, 3309 const u8 *country_ie, u8 country_ie_len, 3310 const u8 *pwr_constr_ie, 3311 const u8 *cisco_dtpc_ie) 3312 { 3313 struct ieee80211_sub_if_data *sdata = link->sdata; 3314 bool has_80211h_pwr = false, has_cisco_pwr = false; 3315 int chan_pwr = 0, pwr_reduction_80211h = 0; 3316 int pwr_level_cisco, pwr_level_80211h; 3317 int new_ap_level; 3318 __le16 capab = mgmt->u.probe_resp.capab_info; 3319 3320 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3321 return 0; /* TODO */ 3322 3323 if (country_ie && 3324 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3325 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3326 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3327 channel, country_ie, country_ie_len, 3328 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3329 pwr_level_80211h = 3330 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3331 } 3332 3333 if (cisco_dtpc_ie) { 3334 ieee80211_find_cisco_dtpc( 3335 channel, cisco_dtpc_ie, &pwr_level_cisco); 3336 has_cisco_pwr = true; 3337 } 3338 3339 if (!has_80211h_pwr && !has_cisco_pwr) 3340 return 0; 3341 3342 /* If we have both 802.11h and Cisco DTPC, apply both limits 3343 * by picking the smallest of the two power levels advertised. 3344 */ 3345 if (has_80211h_pwr && 3346 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3347 new_ap_level = pwr_level_80211h; 3348 3349 if (link->ap_power_level == new_ap_level) 3350 return 0; 3351 3352 sdata_dbg(sdata, 3353 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3354 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3355 link->u.mgd.bssid); 3356 } else { /* has_cisco_pwr is always true here. */ 3357 new_ap_level = pwr_level_cisco; 3358 3359 if (link->ap_power_level == new_ap_level) 3360 return 0; 3361 3362 sdata_dbg(sdata, 3363 "Limiting TX power to %d dBm as advertised by %pM\n", 3364 pwr_level_cisco, link->u.mgd.bssid); 3365 } 3366 3367 link->ap_power_level = new_ap_level; 3368 if (__ieee80211_recalc_txpower(link)) 3369 return BSS_CHANGED_TXPOWER; 3370 return 0; 3371 } 3372 3373 /* powersave */ 3374 static void ieee80211_enable_ps(struct ieee80211_local *local, 3375 struct ieee80211_sub_if_data *sdata) 3376 { 3377 struct ieee80211_conf *conf = &local->hw.conf; 3378 3379 /* 3380 * If we are scanning right now then the parameters will 3381 * take effect when scan finishes. 3382 */ 3383 if (local->scanning) 3384 return; 3385 3386 if (conf->dynamic_ps_timeout > 0 && 3387 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3388 mod_timer(&local->dynamic_ps_timer, jiffies + 3389 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3390 } else { 3391 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3392 ieee80211_send_nullfunc(local, sdata, true); 3393 3394 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3395 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3396 return; 3397 3398 conf->flags |= IEEE80211_CONF_PS; 3399 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3400 } 3401 } 3402 3403 static void ieee80211_change_ps(struct ieee80211_local *local) 3404 { 3405 struct ieee80211_conf *conf = &local->hw.conf; 3406 3407 if (local->ps_sdata) { 3408 ieee80211_enable_ps(local, local->ps_sdata); 3409 } else if (conf->flags & IEEE80211_CONF_PS) { 3410 conf->flags &= ~IEEE80211_CONF_PS; 3411 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3412 timer_delete_sync(&local->dynamic_ps_timer); 3413 wiphy_work_cancel(local->hw.wiphy, 3414 &local->dynamic_ps_enable_work); 3415 } 3416 } 3417 3418 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3419 { 3420 struct ieee80211_local *local = sdata->local; 3421 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3422 struct sta_info *sta = NULL; 3423 bool authorized = false; 3424 3425 if (!mgd->powersave) 3426 return false; 3427 3428 if (mgd->broken_ap) 3429 return false; 3430 3431 if (!mgd->associated) 3432 return false; 3433 3434 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3435 return false; 3436 3437 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3438 !sdata->deflink.u.mgd.have_beacon) 3439 return false; 3440 3441 rcu_read_lock(); 3442 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3443 if (sta) 3444 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3445 rcu_read_unlock(); 3446 3447 return authorized; 3448 } 3449 3450 /* need to hold RTNL or interface lock */ 3451 void ieee80211_recalc_ps(struct ieee80211_local *local) 3452 { 3453 struct ieee80211_sub_if_data *sdata, *found = NULL; 3454 int count = 0; 3455 int timeout; 3456 3457 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3458 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3459 local->ps_sdata = NULL; 3460 return; 3461 } 3462 3463 list_for_each_entry(sdata, &local->interfaces, list) { 3464 if (!ieee80211_sdata_running(sdata)) 3465 continue; 3466 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3467 /* If an AP vif is found, then disable PS 3468 * by setting the count to zero thereby setting 3469 * ps_sdata to NULL. 3470 */ 3471 count = 0; 3472 break; 3473 } 3474 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3475 continue; 3476 found = sdata; 3477 count++; 3478 } 3479 3480 if (count == 1 && ieee80211_powersave_allowed(found)) { 3481 u8 dtimper = found->deflink.u.mgd.dtim_period; 3482 3483 timeout = local->dynamic_ps_forced_timeout; 3484 if (timeout < 0) 3485 timeout = 100; 3486 local->hw.conf.dynamic_ps_timeout = timeout; 3487 3488 /* If the TIM IE is invalid, pretend the value is 1 */ 3489 if (!dtimper) 3490 dtimper = 1; 3491 3492 local->hw.conf.ps_dtim_period = dtimper; 3493 local->ps_sdata = found; 3494 } else { 3495 local->ps_sdata = NULL; 3496 } 3497 3498 ieee80211_change_ps(local); 3499 } 3500 3501 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3502 { 3503 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3504 3505 if (sdata->vif.cfg.ps != ps_allowed) { 3506 sdata->vif.cfg.ps = ps_allowed; 3507 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3508 } 3509 } 3510 3511 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3512 struct wiphy_work *work) 3513 { 3514 struct ieee80211_local *local = 3515 container_of(work, struct ieee80211_local, 3516 dynamic_ps_disable_work); 3517 3518 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3519 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3520 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3521 } 3522 3523 ieee80211_wake_queues_by_reason(&local->hw, 3524 IEEE80211_MAX_QUEUE_MAP, 3525 IEEE80211_QUEUE_STOP_REASON_PS, 3526 false); 3527 } 3528 3529 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3530 struct wiphy_work *work) 3531 { 3532 struct ieee80211_local *local = 3533 container_of(work, struct ieee80211_local, 3534 dynamic_ps_enable_work); 3535 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3536 struct ieee80211_if_managed *ifmgd; 3537 unsigned long flags; 3538 int q; 3539 3540 /* can only happen when PS was just disabled anyway */ 3541 if (!sdata) 3542 return; 3543 3544 ifmgd = &sdata->u.mgd; 3545 3546 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3547 return; 3548 3549 if (local->hw.conf.dynamic_ps_timeout > 0) { 3550 /* don't enter PS if TX frames are pending */ 3551 if (drv_tx_frames_pending(local)) { 3552 mod_timer(&local->dynamic_ps_timer, jiffies + 3553 msecs_to_jiffies( 3554 local->hw.conf.dynamic_ps_timeout)); 3555 return; 3556 } 3557 3558 /* 3559 * transmission can be stopped by others which leads to 3560 * dynamic_ps_timer expiry. Postpone the ps timer if it 3561 * is not the actual idle state. 3562 */ 3563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3564 for (q = 0; q < local->hw.queues; q++) { 3565 if (local->queue_stop_reasons[q]) { 3566 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3567 flags); 3568 mod_timer(&local->dynamic_ps_timer, jiffies + 3569 msecs_to_jiffies( 3570 local->hw.conf.dynamic_ps_timeout)); 3571 return; 3572 } 3573 } 3574 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3575 } 3576 3577 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3578 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3579 if (drv_tx_frames_pending(local)) { 3580 mod_timer(&local->dynamic_ps_timer, jiffies + 3581 msecs_to_jiffies( 3582 local->hw.conf.dynamic_ps_timeout)); 3583 } else { 3584 ieee80211_send_nullfunc(local, sdata, true); 3585 /* Flush to get the tx status of nullfunc frame */ 3586 ieee80211_flush_queues(local, sdata, false); 3587 } 3588 } 3589 3590 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3591 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3592 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3593 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3594 local->hw.conf.flags |= IEEE80211_CONF_PS; 3595 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3596 } 3597 } 3598 3599 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3600 { 3601 struct ieee80211_local *local = timer_container_of(local, t, 3602 dynamic_ps_timer); 3603 3604 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3605 } 3606 3607 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3608 { 3609 struct ieee80211_link_data *link = 3610 container_of(work, struct ieee80211_link_data, 3611 dfs_cac_timer_work.work); 3612 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3613 struct ieee80211_sub_if_data *sdata = link->sdata; 3614 3615 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3616 3617 if (sdata->wdev.links[link->link_id].cac_started) { 3618 ieee80211_link_release_channel(link); 3619 cfg80211_cac_event(sdata->dev, &chandef, 3620 NL80211_RADAR_CAC_FINISHED, 3621 GFP_KERNEL, link->link_id); 3622 } 3623 } 3624 3625 static bool 3626 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3627 { 3628 struct ieee80211_local *local = sdata->local; 3629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3630 bool ret = false; 3631 int ac; 3632 3633 if (local->hw.queues < IEEE80211_NUM_ACS) 3634 return false; 3635 3636 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3637 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3638 int non_acm_ac; 3639 unsigned long now = jiffies; 3640 3641 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3642 tx_tspec->admitted_time && 3643 time_after(now, tx_tspec->time_slice_start + HZ)) { 3644 tx_tspec->consumed_tx_time = 0; 3645 tx_tspec->time_slice_start = now; 3646 3647 if (tx_tspec->downgraded) 3648 tx_tspec->action = 3649 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3650 } 3651 3652 switch (tx_tspec->action) { 3653 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3654 /* take the original parameters */ 3655 if (drv_conf_tx(local, &sdata->deflink, ac, 3656 &sdata->deflink.tx_conf[ac])) 3657 link_err(&sdata->deflink, 3658 "failed to set TX queue parameters for queue %d\n", 3659 ac); 3660 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3661 tx_tspec->downgraded = false; 3662 ret = true; 3663 break; 3664 case TX_TSPEC_ACTION_DOWNGRADE: 3665 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3666 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3667 ret = true; 3668 break; 3669 } 3670 /* downgrade next lower non-ACM AC */ 3671 for (non_acm_ac = ac + 1; 3672 non_acm_ac < IEEE80211_NUM_ACS; 3673 non_acm_ac++) 3674 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3675 break; 3676 /* Usually the loop will result in using BK even if it 3677 * requires admission control, but such a configuration 3678 * makes no sense and we have to transmit somehow - the 3679 * AC selection does the same thing. 3680 * If we started out trying to downgrade from BK, then 3681 * the extra condition here might be needed. 3682 */ 3683 if (non_acm_ac >= IEEE80211_NUM_ACS) 3684 non_acm_ac = IEEE80211_AC_BK; 3685 if (drv_conf_tx(local, &sdata->deflink, ac, 3686 &sdata->deflink.tx_conf[non_acm_ac])) 3687 link_err(&sdata->deflink, 3688 "failed to set TX queue parameters for queue %d\n", 3689 ac); 3690 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3691 ret = true; 3692 wiphy_delayed_work_queue(local->hw.wiphy, 3693 &ifmgd->tx_tspec_wk, 3694 tx_tspec->time_slice_start + 3695 HZ - now + 1); 3696 break; 3697 case TX_TSPEC_ACTION_NONE: 3698 /* nothing now */ 3699 break; 3700 } 3701 } 3702 3703 return ret; 3704 } 3705 3706 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3707 { 3708 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3709 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3710 BSS_CHANGED_QOS); 3711 } 3712 3713 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3714 struct wiphy_work *work) 3715 { 3716 struct ieee80211_sub_if_data *sdata; 3717 3718 sdata = container_of(work, struct ieee80211_sub_if_data, 3719 u.mgd.tx_tspec_wk.work); 3720 ieee80211_sta_handle_tspec_ac_params(sdata); 3721 } 3722 3723 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3724 { 3725 struct ieee80211_sub_if_data *sdata = link->sdata; 3726 struct ieee80211_local *local = sdata->local; 3727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3728 struct ieee80211_tx_queue_params *params = link->tx_conf; 3729 u8 ac; 3730 3731 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3732 mlme_dbg(sdata, 3733 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3734 ac, params[ac].acm, 3735 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3736 params[ac].txop, params[ac].uapsd, 3737 ifmgd->tx_tspec[ac].downgraded); 3738 if (!ifmgd->tx_tspec[ac].downgraded && 3739 drv_conf_tx(local, link, ac, ¶ms[ac])) 3740 link_err(link, 3741 "failed to set TX queue parameters for AC %d\n", 3742 ac); 3743 } 3744 } 3745 3746 /* MLME */ 3747 static bool 3748 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3749 struct ieee80211_link_data *link, 3750 const u8 *wmm_param, size_t wmm_param_len, 3751 const struct ieee80211_mu_edca_param_set *mu_edca) 3752 { 3753 struct ieee80211_sub_if_data *sdata = link->sdata; 3754 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3756 size_t left; 3757 int count, mu_edca_count, ac; 3758 const u8 *pos; 3759 u8 uapsd_queues = 0; 3760 3761 if (!local->ops->conf_tx) 3762 return false; 3763 3764 if (local->hw.queues < IEEE80211_NUM_ACS) 3765 return false; 3766 3767 if (!wmm_param) 3768 return false; 3769 3770 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3771 return false; 3772 3773 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3774 uapsd_queues = ifmgd->uapsd_queues; 3775 3776 count = wmm_param[6] & 0x0f; 3777 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3778 * if mu_edca was preset before and now it disappeared tell 3779 * the driver about it. 3780 */ 3781 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3782 if (count == link->u.mgd.wmm_last_param_set && 3783 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3784 return false; 3785 link->u.mgd.wmm_last_param_set = count; 3786 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3787 3788 pos = wmm_param + 8; 3789 left = wmm_param_len - 8; 3790 3791 memset(¶ms, 0, sizeof(params)); 3792 3793 sdata->wmm_acm = 0; 3794 for (; left >= 4; left -= 4, pos += 4) { 3795 int aci = (pos[0] >> 5) & 0x03; 3796 int acm = (pos[0] >> 4) & 0x01; 3797 bool uapsd = false; 3798 3799 switch (aci) { 3800 case 1: /* AC_BK */ 3801 ac = IEEE80211_AC_BK; 3802 if (acm) 3803 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3804 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3805 uapsd = true; 3806 params[ac].mu_edca = !!mu_edca; 3807 if (mu_edca) 3808 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3809 break; 3810 case 2: /* AC_VI */ 3811 ac = IEEE80211_AC_VI; 3812 if (acm) 3813 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3814 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3815 uapsd = true; 3816 params[ac].mu_edca = !!mu_edca; 3817 if (mu_edca) 3818 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3819 break; 3820 case 3: /* AC_VO */ 3821 ac = IEEE80211_AC_VO; 3822 if (acm) 3823 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3824 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3825 uapsd = true; 3826 params[ac].mu_edca = !!mu_edca; 3827 if (mu_edca) 3828 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3829 break; 3830 case 0: /* AC_BE */ 3831 default: 3832 ac = IEEE80211_AC_BE; 3833 if (acm) 3834 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3835 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3836 uapsd = true; 3837 params[ac].mu_edca = !!mu_edca; 3838 if (mu_edca) 3839 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3840 break; 3841 } 3842 3843 params[ac].aifs = pos[0] & 0x0f; 3844 3845 if (params[ac].aifs < 2) { 3846 link_info(link, 3847 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3848 params[ac].aifs, aci); 3849 params[ac].aifs = 2; 3850 } 3851 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3852 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3853 params[ac].txop = get_unaligned_le16(pos + 2); 3854 params[ac].acm = acm; 3855 params[ac].uapsd = uapsd; 3856 3857 if (params[ac].cw_min == 0 || 3858 params[ac].cw_min > params[ac].cw_max) { 3859 link_info(link, 3860 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3861 params[ac].cw_min, params[ac].cw_max, aci); 3862 return false; 3863 } 3864 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3865 } 3866 3867 /* WMM specification requires all 4 ACIs. */ 3868 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3869 if (params[ac].cw_min == 0) { 3870 link_info(link, 3871 "AP has invalid WMM params (missing AC %d), using defaults\n", 3872 ac); 3873 return false; 3874 } 3875 } 3876 3877 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3878 link->tx_conf[ac] = params[ac]; 3879 3880 return true; 3881 } 3882 3883 static bool 3884 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3885 struct ieee80211_link_data *link, 3886 const u8 *wmm_param, size_t wmm_param_len, 3887 const struct ieee80211_mu_edca_param_set *mu_edca) 3888 { 3889 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3890 mu_edca)) 3891 return false; 3892 3893 ieee80211_mgd_set_link_qos_params(link); 3894 3895 /* enable WMM or activate new settings */ 3896 link->conf->qos = true; 3897 return true; 3898 } 3899 3900 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3901 { 3902 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3903 3904 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3905 ieee80211_run_deferred_scan(sdata->local); 3906 } 3907 3908 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3909 { 3910 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3911 3912 __ieee80211_stop_poll(sdata); 3913 } 3914 3915 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3916 u16 capab, bool erp_valid, u8 erp) 3917 { 3918 struct ieee80211_bss_conf *bss_conf = link->conf; 3919 struct ieee80211_supported_band *sband; 3920 u64 changed = 0; 3921 bool use_protection; 3922 bool use_short_preamble; 3923 bool use_short_slot; 3924 3925 sband = ieee80211_get_link_sband(link); 3926 if (!sband) 3927 return changed; 3928 3929 if (erp_valid) { 3930 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3931 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3932 } else { 3933 use_protection = false; 3934 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3935 } 3936 3937 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3938 if (sband->band == NL80211_BAND_5GHZ || 3939 sband->band == NL80211_BAND_6GHZ) 3940 use_short_slot = true; 3941 3942 if (use_protection != bss_conf->use_cts_prot) { 3943 bss_conf->use_cts_prot = use_protection; 3944 changed |= BSS_CHANGED_ERP_CTS_PROT; 3945 } 3946 3947 if (use_short_preamble != bss_conf->use_short_preamble) { 3948 bss_conf->use_short_preamble = use_short_preamble; 3949 changed |= BSS_CHANGED_ERP_PREAMBLE; 3950 } 3951 3952 if (use_short_slot != bss_conf->use_short_slot) { 3953 bss_conf->use_short_slot = use_short_slot; 3954 changed |= BSS_CHANGED_ERP_SLOT; 3955 } 3956 3957 return changed; 3958 } 3959 3960 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3961 struct cfg80211_bss *cbss) 3962 { 3963 struct ieee80211_sub_if_data *sdata = link->sdata; 3964 struct ieee80211_bss_conf *bss_conf = link->conf; 3965 struct ieee80211_bss *bss = (void *)cbss->priv; 3966 u64 changed = BSS_CHANGED_QOS; 3967 3968 /* not really used in MLO */ 3969 sdata->u.mgd.beacon_timeout = 3970 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3971 bss_conf->beacon_int)); 3972 3973 changed |= ieee80211_handle_bss_capability(link, 3974 bss_conf->assoc_capability, 3975 bss->has_erp_value, 3976 bss->erp_value); 3977 3978 ieee80211_check_rate_mask(link); 3979 3980 link->conf->bss = cbss; 3981 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3982 3983 if (sdata->vif.p2p || 3984 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3985 const struct cfg80211_bss_ies *ies; 3986 3987 rcu_read_lock(); 3988 ies = rcu_dereference(cbss->ies); 3989 if (ies) { 3990 int ret; 3991 3992 ret = cfg80211_get_p2p_attr( 3993 ies->data, ies->len, 3994 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3995 (u8 *) &bss_conf->p2p_noa_attr, 3996 sizeof(bss_conf->p2p_noa_attr)); 3997 if (ret >= 2) { 3998 link->u.mgd.p2p_noa_index = 3999 bss_conf->p2p_noa_attr.index; 4000 changed |= BSS_CHANGED_P2P_PS; 4001 } 4002 } 4003 rcu_read_unlock(); 4004 } 4005 4006 if (link->u.mgd.have_beacon) { 4007 bss_conf->beacon_rate = bss->beacon_rate; 4008 changed |= BSS_CHANGED_BEACON_INFO; 4009 } else { 4010 bss_conf->beacon_rate = NULL; 4011 } 4012 4013 /* Tell the driver to monitor connection quality (if supported) */ 4014 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 4015 bss_conf->cqm_rssi_thold) 4016 changed |= BSS_CHANGED_CQM; 4017 4018 return changed; 4019 } 4020 4021 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 4022 struct ieee80211_mgd_assoc_data *assoc_data, 4023 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 4024 { 4025 struct ieee80211_local *local = sdata->local; 4026 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4027 u64 vif_changed = BSS_CHANGED_ASSOC; 4028 unsigned int link_id; 4029 4030 lockdep_assert_wiphy(local->hw.wiphy); 4031 4032 sdata->u.mgd.associated = true; 4033 4034 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4035 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4036 struct ieee80211_link_data *link; 4037 4038 if (!cbss || 4039 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4040 continue; 4041 4042 if (ieee80211_vif_is_mld(&sdata->vif) && 4043 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 4044 continue; 4045 4046 link = sdata_dereference(sdata->link[link_id], sdata); 4047 if (WARN_ON(!link)) 4048 return; 4049 4050 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 4051 } 4052 4053 /* just to be sure */ 4054 ieee80211_stop_poll(sdata); 4055 4056 ieee80211_led_assoc(local, 1); 4057 4058 vif_cfg->assoc = 1; 4059 4060 /* Enable ARP filtering */ 4061 if (vif_cfg->arp_addr_cnt) 4062 vif_changed |= BSS_CHANGED_ARP_FILTER; 4063 4064 if (ieee80211_vif_is_mld(&sdata->vif)) { 4065 for (link_id = 0; 4066 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4067 link_id++) { 4068 struct ieee80211_link_data *link; 4069 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4070 4071 if (!cbss || 4072 !(BIT(link_id) & 4073 ieee80211_vif_usable_links(&sdata->vif)) || 4074 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4075 continue; 4076 4077 link = sdata_dereference(sdata->link[link_id], sdata); 4078 if (WARN_ON(!link)) 4079 return; 4080 4081 ieee80211_link_info_change_notify(sdata, link, 4082 changed[link_id]); 4083 4084 ieee80211_recalc_smps(sdata, link); 4085 } 4086 4087 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 4088 } else { 4089 ieee80211_bss_info_change_notify(sdata, 4090 vif_changed | changed[0]); 4091 } 4092 4093 ieee80211_recalc_ps(local); 4094 4095 /* leave this here to not change ordering in non-MLO cases */ 4096 if (!ieee80211_vif_is_mld(&sdata->vif)) 4097 ieee80211_recalc_smps(sdata, &sdata->deflink); 4098 ieee80211_recalc_ps_vif(sdata); 4099 4100 netif_carrier_on(sdata->dev); 4101 } 4102 4103 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4104 { 4105 struct ieee80211_mgd_assoc_data *add_links_data = 4106 sdata->u.mgd.reconf.add_links_data; 4107 4108 if (!ieee80211_vif_is_mld(&sdata->vif) || 4109 !(sdata->u.mgd.reconf.added_links | 4110 sdata->u.mgd.reconf.removed_links)) 4111 return; 4112 4113 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4114 &sdata->u.mgd.reconf.wk); 4115 sdata->u.mgd.reconf.added_links = 0; 4116 sdata->u.mgd.reconf.removed_links = 0; 4117 sdata->u.mgd.reconf.dialog_token = 0; 4118 4119 if (add_links_data) { 4120 struct cfg80211_mlo_reconf_done_data done_data = {}; 4121 u8 link_id; 4122 4123 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4124 link_id++) 4125 done_data.links[link_id].bss = 4126 add_links_data->link[link_id].bss; 4127 4128 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4129 4130 kfree(sdata->u.mgd.reconf.add_links_data); 4131 sdata->u.mgd.reconf.add_links_data = NULL; 4132 } 4133 } 4134 4135 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4136 u16 stype, u16 reason, bool tx, 4137 u8 *frame_buf) 4138 { 4139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4140 struct ieee80211_local *local = sdata->local; 4141 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4142 unsigned int link_id; 4143 u64 changed = 0; 4144 struct ieee80211_prep_tx_info info = { 4145 .subtype = stype, 4146 .was_assoc = true, 4147 .link_id = ffs(sdata->vif.active_links) - 1, 4148 }; 4149 4150 lockdep_assert_wiphy(local->hw.wiphy); 4151 4152 if (frame_buf) 4153 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4154 4155 if (WARN_ON(!ap_sta)) 4156 return; 4157 4158 if (WARN_ON_ONCE(tx && !frame_buf)) 4159 return; 4160 4161 if (WARN_ON(!ifmgd->associated)) 4162 return; 4163 4164 ieee80211_stop_poll(sdata); 4165 4166 ifmgd->associated = false; 4167 4168 if (tx) { 4169 bool tx_link_found = false; 4170 4171 for (link_id = 0; 4172 link_id < ARRAY_SIZE(sdata->link); 4173 link_id++) { 4174 struct ieee80211_link_data *link; 4175 4176 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4177 continue; 4178 4179 link = sdata_dereference(sdata->link[link_id], sdata); 4180 if (WARN_ON_ONCE(!link)) 4181 continue; 4182 4183 if (link->u.mgd.csa.blocked_tx) 4184 continue; 4185 4186 tx_link_found = true; 4187 break; 4188 } 4189 4190 tx = tx_link_found; 4191 } 4192 4193 /* other links will be destroyed */ 4194 sdata->deflink.conf->bss = NULL; 4195 sdata->deflink.conf->epcs_support = false; 4196 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4197 4198 netif_carrier_off(sdata->dev); 4199 4200 /* 4201 * if we want to get out of ps before disassoc (why?) we have 4202 * to do it before sending disassoc, as otherwise the null-packet 4203 * won't be valid. 4204 */ 4205 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4206 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4207 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4208 } 4209 local->ps_sdata = NULL; 4210 4211 /* disable per-vif ps */ 4212 ieee80211_recalc_ps_vif(sdata); 4213 4214 /* make sure ongoing transmission finishes */ 4215 synchronize_net(); 4216 4217 /* 4218 * drop any frame before deauth/disassoc, this can be data or 4219 * management frame. Since we are disconnecting, we should not 4220 * insist sending these frames which can take time and delay 4221 * the disconnection and possible the roaming. 4222 */ 4223 ieee80211_flush_queues(local, sdata, true); 4224 4225 if (tx) { 4226 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4227 4228 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4229 sdata->vif.cfg.ap_addr, stype, 4230 reason, true, frame_buf); 4231 4232 /* flush out frame - make sure the deauth was actually sent */ 4233 ieee80211_flush_queues(local, sdata, false); 4234 4235 drv_mgd_complete_tx(sdata->local, sdata, &info); 4236 } else if (frame_buf) { 4237 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4238 sdata->vif.cfg.ap_addr, stype, 4239 reason, false, frame_buf); 4240 } 4241 4242 /* clear AP addr only after building the needed mgmt frames */ 4243 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4244 eth_zero_addr(sdata->vif.cfg.ap_addr); 4245 4246 sdata->vif.cfg.ssid_len = 0; 4247 4248 /* Remove TDLS peers */ 4249 __sta_info_flush(sdata, false, -1, ap_sta); 4250 4251 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4252 /* Only move the AP state */ 4253 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4254 } else { 4255 /* Remove AP peer */ 4256 sta_info_flush(sdata, -1); 4257 } 4258 4259 /* finally reset all BSS / config parameters */ 4260 if (!ieee80211_vif_is_mld(&sdata->vif)) 4261 changed |= ieee80211_reset_erp_info(sdata); 4262 4263 ieee80211_led_assoc(local, 0); 4264 changed |= BSS_CHANGED_ASSOC; 4265 sdata->vif.cfg.assoc = false; 4266 4267 sdata->deflink.u.mgd.p2p_noa_index = -1; 4268 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4269 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4270 4271 /* on the next assoc, re-program HT/VHT parameters */ 4272 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4273 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4274 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4275 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4276 4277 /* 4278 * reset MU-MIMO ownership and group data in default link, 4279 * if used, other links are destroyed 4280 */ 4281 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4282 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4283 memset(sdata->vif.bss_conf.mu_group.position, 0, 4284 sizeof(sdata->vif.bss_conf.mu_group.position)); 4285 if (!ieee80211_vif_is_mld(&sdata->vif)) 4286 changed |= BSS_CHANGED_MU_GROUPS; 4287 sdata->vif.bss_conf.mu_mimo_owner = false; 4288 4289 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4290 4291 timer_delete_sync(&local->dynamic_ps_timer); 4292 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4293 4294 /* Disable ARP filtering */ 4295 if (sdata->vif.cfg.arp_addr_cnt) 4296 changed |= BSS_CHANGED_ARP_FILTER; 4297 4298 sdata->vif.bss_conf.qos = false; 4299 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4300 changed |= BSS_CHANGED_QOS; 4301 /* The BSSID (not really interesting) and HT changed */ 4302 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4303 ieee80211_bss_info_change_notify(sdata, changed); 4304 } else { 4305 ieee80211_vif_cfg_change_notify(sdata, changed); 4306 } 4307 4308 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4309 /* 4310 * After notifying the driver about the disassoc, 4311 * remove the ap sta. 4312 */ 4313 sta_info_flush(sdata, -1); 4314 } 4315 4316 /* disassociated - set to defaults now */ 4317 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4318 4319 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4320 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4321 timer_delete_sync(&sdata->u.mgd.timer); 4322 4323 sdata->vif.bss_conf.dtim_period = 0; 4324 sdata->vif.bss_conf.beacon_rate = NULL; 4325 4326 sdata->deflink.u.mgd.have_beacon = false; 4327 sdata->deflink.u.mgd.tracking_signal_avg = false; 4328 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4329 4330 ifmgd->flags = 0; 4331 4332 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4333 struct ieee80211_link_data *link; 4334 4335 link = sdata_dereference(sdata->link[link_id], sdata); 4336 if (!link) 4337 continue; 4338 ieee80211_link_release_channel(link); 4339 } 4340 4341 sdata->vif.bss_conf.csa_active = false; 4342 sdata->deflink.u.mgd.csa.blocked_tx = false; 4343 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4344 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4345 ieee80211_vif_unblock_queues_csa(sdata); 4346 4347 /* existing TX TSPEC sessions no longer exist */ 4348 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4349 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4350 4351 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4352 sdata->vif.bss_conf.pwr_reduction = 0; 4353 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4354 4355 sdata->vif.cfg.eml_cap = 0; 4356 sdata->vif.cfg.eml_med_sync_delay = 0; 4357 sdata->vif.cfg.mld_capa_op = 0; 4358 4359 memset(&sdata->u.mgd.ttlm_info, 0, 4360 sizeof(sdata->u.mgd.ttlm_info)); 4361 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4362 4363 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4364 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4365 &ifmgd->neg_ttlm_timeout_work); 4366 4367 sdata->u.mgd.removed_links = 0; 4368 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4369 &sdata->u.mgd.ml_reconf_work); 4370 4371 wiphy_work_cancel(sdata->local->hw.wiphy, 4372 &ifmgd->teardown_ttlm_work); 4373 4374 /* if disconnection happens in the middle of the ML reconfiguration 4375 * flow, cfg80211 must called to release the BSS references obtained 4376 * when the flow started. 4377 */ 4378 ieee80211_ml_reconf_reset(sdata); 4379 4380 ieee80211_vif_set_links(sdata, 0, 0); 4381 4382 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4383 4384 ifmgd->epcs.enabled = false; 4385 ifmgd->epcs.dialog_token = 0; 4386 4387 memset(ifmgd->userspace_selectors, 0, 4388 sizeof(ifmgd->userspace_selectors)); 4389 } 4390 4391 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4392 { 4393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4394 struct ieee80211_local *local = sdata->local; 4395 4396 lockdep_assert_wiphy(local->hw.wiphy); 4397 4398 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4399 return; 4400 4401 __ieee80211_stop_poll(sdata); 4402 4403 ieee80211_recalc_ps(local); 4404 4405 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4406 return; 4407 4408 /* 4409 * We've received a probe response, but are not sure whether 4410 * we have or will be receiving any beacons or data, so let's 4411 * schedule the timers again, just in case. 4412 */ 4413 ieee80211_sta_reset_beacon_monitor(sdata); 4414 4415 mod_timer(&ifmgd->conn_mon_timer, 4416 round_jiffies_up(jiffies + 4417 IEEE80211_CONNECTION_IDLE_TIME)); 4418 } 4419 4420 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4421 struct ieee80211_hdr *hdr, 4422 u16 tx_time) 4423 { 4424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4425 u16 tid; 4426 int ac; 4427 struct ieee80211_sta_tx_tspec *tx_tspec; 4428 unsigned long now = jiffies; 4429 4430 if (!ieee80211_is_data_qos(hdr->frame_control)) 4431 return; 4432 4433 tid = ieee80211_get_tid(hdr); 4434 ac = ieee80211_ac_from_tid(tid); 4435 tx_tspec = &ifmgd->tx_tspec[ac]; 4436 4437 if (likely(!tx_tspec->admitted_time)) 4438 return; 4439 4440 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4441 tx_tspec->consumed_tx_time = 0; 4442 tx_tspec->time_slice_start = now; 4443 4444 if (tx_tspec->downgraded) { 4445 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4446 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4447 &ifmgd->tx_tspec_wk, 0); 4448 } 4449 } 4450 4451 if (tx_tspec->downgraded) 4452 return; 4453 4454 tx_tspec->consumed_tx_time += tx_time; 4455 4456 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4457 tx_tspec->downgraded = true; 4458 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4459 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4460 &ifmgd->tx_tspec_wk, 0); 4461 } 4462 } 4463 4464 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4465 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4466 { 4467 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4468 4469 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4470 !sdata->u.mgd.probe_send_count) 4471 return; 4472 4473 if (ack) 4474 sdata->u.mgd.probe_send_count = 0; 4475 else 4476 sdata->u.mgd.nullfunc_failed = true; 4477 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4478 } 4479 4480 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4481 const u8 *src, const u8 *dst, 4482 const u8 *ssid, size_t ssid_len, 4483 struct ieee80211_channel *channel) 4484 { 4485 struct sk_buff *skb; 4486 4487 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4488 ssid, ssid_len, NULL, 0, 4489 IEEE80211_PROBE_FLAG_DIRECTED); 4490 if (skb) 4491 ieee80211_tx_skb(sdata, skb); 4492 } 4493 4494 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4495 { 4496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4497 u8 *dst = sdata->vif.cfg.ap_addr; 4498 u8 unicast_limit = max(1, max_probe_tries - 3); 4499 struct sta_info *sta; 4500 4501 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4502 4503 /* 4504 * Try sending broadcast probe requests for the last three 4505 * probe requests after the first ones failed since some 4506 * buggy APs only support broadcast probe requests. 4507 */ 4508 if (ifmgd->probe_send_count >= unicast_limit) 4509 dst = NULL; 4510 4511 /* 4512 * When the hardware reports an accurate Tx ACK status, it's 4513 * better to send a nullfunc frame instead of a probe request, 4514 * as it will kick us off the AP quickly if we aren't associated 4515 * anymore. The timeout will be reset if the frame is ACKed by 4516 * the AP. 4517 */ 4518 ifmgd->probe_send_count++; 4519 4520 if (dst) { 4521 sta = sta_info_get(sdata, dst); 4522 if (!WARN_ON(!sta)) 4523 ieee80211_check_fast_rx(sta); 4524 } 4525 4526 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4527 ifmgd->nullfunc_failed = false; 4528 ieee80211_send_nullfunc(sdata->local, sdata, false); 4529 } else { 4530 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4531 sdata->vif.cfg.ssid, 4532 sdata->vif.cfg.ssid_len, 4533 sdata->deflink.conf->bss->channel); 4534 } 4535 4536 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4537 run_again(sdata, ifmgd->probe_timeout); 4538 } 4539 4540 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4541 bool beacon) 4542 { 4543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4544 bool already = false; 4545 4546 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4547 4548 if (!ieee80211_sdata_running(sdata)) 4549 return; 4550 4551 if (!ifmgd->associated) 4552 return; 4553 4554 if (sdata->local->tmp_channel || sdata->local->scanning) 4555 return; 4556 4557 if (sdata->local->suspending) { 4558 /* reschedule after resume */ 4559 ieee80211_reset_ap_probe(sdata); 4560 return; 4561 } 4562 4563 if (beacon) { 4564 mlme_dbg_ratelimited(sdata, 4565 "detected beacon loss from AP (missed %d beacons) - probing\n", 4566 beacon_loss_count); 4567 4568 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4569 } 4570 4571 /* 4572 * The driver/our work has already reported this event or the 4573 * connection monitoring has kicked in and we have already sent 4574 * a probe request. Or maybe the AP died and the driver keeps 4575 * reporting until we disassociate... 4576 * 4577 * In either case we have to ignore the current call to this 4578 * function (except for setting the correct probe reason bit) 4579 * because otherwise we would reset the timer every time and 4580 * never check whether we received a probe response! 4581 */ 4582 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4583 already = true; 4584 4585 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4586 4587 if (already) 4588 return; 4589 4590 ieee80211_recalc_ps(sdata->local); 4591 4592 ifmgd->probe_send_count = 0; 4593 ieee80211_mgd_probe_ap_send(sdata); 4594 } 4595 4596 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4597 struct ieee80211_vif *vif) 4598 { 4599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4601 struct cfg80211_bss *cbss; 4602 struct sk_buff *skb; 4603 const struct element *ssid; 4604 int ssid_len; 4605 4606 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4607 4608 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4609 ieee80211_vif_is_mld(&sdata->vif))) 4610 return NULL; 4611 4612 if (ifmgd->associated) 4613 cbss = sdata->deflink.conf->bss; 4614 else if (ifmgd->auth_data) 4615 cbss = ifmgd->auth_data->bss; 4616 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4617 cbss = ifmgd->assoc_data->link[0].bss; 4618 else 4619 return NULL; 4620 4621 rcu_read_lock(); 4622 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4623 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4624 "invalid SSID element (len=%d)", 4625 ssid ? ssid->datalen : -1)) 4626 ssid_len = 0; 4627 else 4628 ssid_len = ssid->datalen; 4629 4630 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4631 (u32) -1, cbss->channel, 4632 ssid->data, ssid_len, 4633 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4634 rcu_read_unlock(); 4635 4636 return skb; 4637 } 4638 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4639 4640 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4641 const u8 *buf, size_t len, bool tx, 4642 u16 reason, bool reconnect) 4643 { 4644 struct ieee80211_event event = { 4645 .type = MLME_EVENT, 4646 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4647 .u.mlme.reason = reason, 4648 }; 4649 4650 if (tx) 4651 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4652 else 4653 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4654 4655 drv_event_callback(sdata->local, sdata, &event); 4656 } 4657 4658 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4659 { 4660 struct ieee80211_local *local = sdata->local; 4661 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4662 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4663 4664 lockdep_assert_wiphy(local->hw.wiphy); 4665 4666 if (!ifmgd->associated) 4667 return; 4668 4669 if (!ifmgd->driver_disconnect) { 4670 unsigned int link_id; 4671 4672 /* 4673 * AP is probably out of range (or not reachable for another 4674 * reason) so remove the bss structs for that AP. In the case 4675 * of multi-link, it's not clear that all of them really are 4676 * out of range, but if they weren't the driver likely would 4677 * have switched to just have a single link active? 4678 */ 4679 for (link_id = 0; 4680 link_id < ARRAY_SIZE(sdata->link); 4681 link_id++) { 4682 struct ieee80211_link_data *link; 4683 4684 link = sdata_dereference(sdata->link[link_id], sdata); 4685 if (!link || !link->conf->bss) 4686 continue; 4687 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4688 link->conf->bss = NULL; 4689 } 4690 } 4691 4692 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4693 ifmgd->driver_disconnect ? 4694 WLAN_REASON_DEAUTH_LEAVING : 4695 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4696 true, frame_buf); 4697 /* the other links will be destroyed */ 4698 sdata->vif.bss_conf.csa_active = false; 4699 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4700 sdata->deflink.u.mgd.csa.blocked_tx = false; 4701 ieee80211_vif_unblock_queues_csa(sdata); 4702 4703 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4705 ifmgd->reconnect); 4706 ifmgd->reconnect = false; 4707 } 4708 4709 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4710 struct wiphy_work *work) 4711 { 4712 struct ieee80211_sub_if_data *sdata = 4713 container_of(work, struct ieee80211_sub_if_data, 4714 u.mgd.beacon_connection_loss_work); 4715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4716 4717 if (ifmgd->connection_loss) { 4718 sdata_info(sdata, "Connection to AP %pM lost\n", 4719 sdata->vif.cfg.ap_addr); 4720 __ieee80211_disconnect(sdata); 4721 ifmgd->connection_loss = false; 4722 } else if (ifmgd->driver_disconnect) { 4723 sdata_info(sdata, 4724 "Driver requested disconnection from AP %pM\n", 4725 sdata->vif.cfg.ap_addr); 4726 __ieee80211_disconnect(sdata); 4727 ifmgd->driver_disconnect = false; 4728 } else { 4729 if (ifmgd->associated) 4730 sdata->deflink.u.mgd.beacon_loss_count++; 4731 ieee80211_mgd_probe_ap(sdata, true); 4732 } 4733 } 4734 4735 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4736 struct wiphy_work *work) 4737 { 4738 struct ieee80211_sub_if_data *sdata = 4739 container_of(work, struct ieee80211_sub_if_data, 4740 u.mgd.csa_connection_drop_work); 4741 4742 __ieee80211_disconnect(sdata); 4743 } 4744 4745 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4746 { 4747 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4748 struct ieee80211_hw *hw = &sdata->local->hw; 4749 4750 trace_api_beacon_loss(sdata); 4751 4752 sdata->u.mgd.connection_loss = false; 4753 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4754 } 4755 EXPORT_SYMBOL(ieee80211_beacon_loss); 4756 4757 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4758 { 4759 struct ieee80211_sub_if_data *sdata; 4760 struct ieee80211_hw *hw; 4761 4762 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4763 4764 sdata = vif_to_sdata(vif); 4765 hw = &sdata->local->hw; 4766 4767 trace_api_connection_loss(sdata); 4768 4769 sdata->u.mgd.connection_loss = true; 4770 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4771 } 4772 EXPORT_SYMBOL(ieee80211_connection_loss); 4773 4774 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4775 { 4776 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4777 struct ieee80211_hw *hw = &sdata->local->hw; 4778 4779 trace_api_disconnect(sdata, reconnect); 4780 4781 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4782 return; 4783 4784 sdata->u.mgd.driver_disconnect = true; 4785 sdata->u.mgd.reconnect = reconnect; 4786 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4787 } 4788 EXPORT_SYMBOL(ieee80211_disconnect); 4789 4790 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4791 bool assoc) 4792 { 4793 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4794 4795 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4796 4797 sdata->u.mgd.auth_data = NULL; 4798 4799 if (!assoc) { 4800 /* 4801 * we are not authenticated yet, the only timer that could be 4802 * running is the timeout for the authentication response which 4803 * which is not relevant anymore. 4804 */ 4805 timer_delete_sync(&sdata->u.mgd.timer); 4806 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4807 4808 /* other links are destroyed */ 4809 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4810 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4811 BSS_CHANGED_BSSID); 4812 sdata->u.mgd.flags = 0; 4813 4814 ieee80211_link_release_channel(&sdata->deflink); 4815 ieee80211_vif_set_links(sdata, 0, 0); 4816 } 4817 4818 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4819 kfree(auth_data); 4820 } 4821 4822 enum assoc_status { 4823 ASSOC_SUCCESS, 4824 ASSOC_REJECTED, 4825 ASSOC_TIMEOUT, 4826 ASSOC_ABANDON, 4827 }; 4828 4829 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4830 enum assoc_status status) 4831 { 4832 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4833 4834 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4835 4836 sdata->u.mgd.assoc_data = NULL; 4837 4838 if (status != ASSOC_SUCCESS) { 4839 /* 4840 * we are not associated yet, the only timer that could be 4841 * running is the timeout for the association response which 4842 * which is not relevant anymore. 4843 */ 4844 timer_delete_sync(&sdata->u.mgd.timer); 4845 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4846 4847 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4848 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4849 BSS_CHANGED_BSSID); 4850 sdata->u.mgd.flags = 0; 4851 sdata->vif.bss_conf.mu_mimo_owner = false; 4852 4853 if (status != ASSOC_REJECTED) { 4854 struct cfg80211_assoc_failure data = { 4855 .timeout = status == ASSOC_TIMEOUT, 4856 }; 4857 int i; 4858 4859 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4860 ARRAY_SIZE(assoc_data->link)); 4861 4862 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4863 data.bss[i] = assoc_data->link[i].bss; 4864 4865 if (ieee80211_vif_is_mld(&sdata->vif)) 4866 data.ap_mld_addr = assoc_data->ap_addr; 4867 4868 cfg80211_assoc_failure(sdata->dev, &data); 4869 } 4870 4871 ieee80211_link_release_channel(&sdata->deflink); 4872 ieee80211_vif_set_links(sdata, 0, 0); 4873 } 4874 4875 kfree(assoc_data); 4876 } 4877 4878 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4879 struct ieee80211_mgmt *mgmt, size_t len) 4880 { 4881 struct ieee80211_local *local = sdata->local; 4882 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4883 const struct element *challenge; 4884 u8 *pos; 4885 u32 tx_flags = 0; 4886 struct ieee80211_prep_tx_info info = { 4887 .subtype = IEEE80211_STYPE_AUTH, 4888 .link_id = auth_data->link_id, 4889 }; 4890 4891 pos = mgmt->u.auth.variable; 4892 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4893 len - (pos - (u8 *)mgmt)); 4894 if (!challenge) 4895 return; 4896 auth_data->expected_transaction = 4; 4897 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4898 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4899 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4900 IEEE80211_TX_INTFL_MLME_CONN_TX; 4901 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4902 (void *)challenge, 4903 challenge->datalen + sizeof(*challenge), 4904 auth_data->ap_addr, auth_data->ap_addr, 4905 auth_data->key, auth_data->key_len, 4906 auth_data->key_idx, tx_flags); 4907 } 4908 4909 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4910 { 4911 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4912 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4913 struct sta_info *sta; 4914 4915 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4916 4917 sdata_info(sdata, "authenticated\n"); 4918 ifmgd->auth_data->done = true; 4919 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4920 ifmgd->auth_data->timeout_started = true; 4921 run_again(sdata, ifmgd->auth_data->timeout); 4922 4923 /* move station state to auth */ 4924 sta = sta_info_get(sdata, ap_addr); 4925 if (!sta) { 4926 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4927 return false; 4928 } 4929 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4930 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4931 return false; 4932 } 4933 4934 return true; 4935 } 4936 4937 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4938 struct ieee80211_mgmt *mgmt, size_t len) 4939 { 4940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4941 u16 auth_alg, auth_transaction, status_code, encap_len; 4942 struct ieee80211_event event = { 4943 .type = MLME_EVENT, 4944 .u.mlme.data = AUTH_EVENT, 4945 }; 4946 struct ieee80211_prep_tx_info info = { 4947 .subtype = IEEE80211_STYPE_AUTH, 4948 }; 4949 bool sae_need_confirm = false; 4950 bool auth_fail = false; 4951 4952 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4953 4954 if (len < 24 + 6) 4955 return; 4956 4957 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4958 return; 4959 4960 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4961 return; 4962 4963 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4964 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4965 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4966 4967 /* 4968 * IEEE 802.1X Authentication: 4969 * Header + Authentication Algorithm Number(2 byte) + Authentication 4970 * Transaction Sequence Number(2 byte) + Status Code(2 byte) + 4971 * Encapsulation Length(2 byte). 4972 */ 4973 if (auth_alg == WLAN_AUTH_IEEE8021X && len < 24 + 8) 4974 return; 4975 4976 info.link_id = ifmgd->auth_data->link_id; 4977 4978 if (auth_alg != ifmgd->auth_data->algorithm || 4979 (auth_alg != WLAN_AUTH_SAE && 4980 auth_transaction != ifmgd->auth_data->expected_transaction) || 4981 (auth_alg == WLAN_AUTH_SAE && 4982 (auth_transaction < ifmgd->auth_data->expected_transaction || 4983 auth_transaction > 2))) { 4984 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4985 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4986 auth_transaction, 4987 ifmgd->auth_data->expected_transaction); 4988 goto notify_driver; 4989 } 4990 4991 switch (auth_alg) { 4992 case WLAN_AUTH_IEEE8021X: 4993 if (status_code != WLAN_STATUS_SUCCESS && 4994 status_code != WLAN_STATUS_8021X_AUTH_SUCCESS) 4995 auth_fail = true; 4996 4997 if (!auth_fail) { 4998 /* Indicates length of encapsulated EAPOL PDU */ 4999 encap_len = get_unaligned_le16(mgmt->u.auth.variable); 5000 } 5001 break; 5002 default: 5003 if (status_code != WLAN_STATUS_SUCCESS) 5004 auth_fail = true; 5005 break; 5006 } 5007 5008 if (auth_fail) { 5009 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5010 5011 if (auth_alg == WLAN_AUTH_SAE && 5012 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 5013 (auth_transaction == 1 && 5014 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 5015 status_code == WLAN_STATUS_SAE_PK)))) { 5016 /* waiting for userspace now */ 5017 ifmgd->auth_data->waiting = true; 5018 ifmgd->auth_data->timeout = 5019 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 5020 ifmgd->auth_data->timeout_started = true; 5021 run_again(sdata, ifmgd->auth_data->timeout); 5022 if (auth_transaction == 1) 5023 sae_need_confirm = true; 5024 goto notify_driver; 5025 } 5026 5027 sdata_info(sdata, "%pM denied authentication (status %d)\n", 5028 mgmt->sa, status_code); 5029 ieee80211_destroy_auth_data(sdata, false); 5030 event.u.mlme.status = MLME_DENIED; 5031 event.u.mlme.reason = status_code; 5032 drv_event_callback(sdata->local, sdata, &event); 5033 goto notify_driver; 5034 } 5035 5036 switch (ifmgd->auth_data->algorithm) { 5037 case WLAN_AUTH_OPEN: 5038 case WLAN_AUTH_LEAP: 5039 case WLAN_AUTH_FT: 5040 case WLAN_AUTH_SAE: 5041 case WLAN_AUTH_FILS_SK: 5042 case WLAN_AUTH_FILS_SK_PFS: 5043 case WLAN_AUTH_FILS_PK: 5044 case WLAN_AUTH_EPPKE: 5045 case WLAN_AUTH_IEEE8021X: 5046 break; 5047 case WLAN_AUTH_SHARED_KEY: 5048 if (ifmgd->auth_data->expected_transaction != 4) { 5049 ieee80211_auth_challenge(sdata, mgmt, len); 5050 /* need another frame */ 5051 return; 5052 } 5053 break; 5054 default: 5055 WARN_ONCE(1, "invalid auth alg %d", 5056 ifmgd->auth_data->algorithm); 5057 goto notify_driver; 5058 } 5059 5060 event.u.mlme.status = MLME_SUCCESS; 5061 info.success = 1; 5062 drv_event_callback(sdata->local, sdata, &event); 5063 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 5064 (auth_transaction == 2 && 5065 ifmgd->auth_data->expected_transaction == 2)) { 5066 switch (ifmgd->auth_data->algorithm) { 5067 case WLAN_AUTH_IEEE8021X: 5068 /* 5069 * IEEE 802.1X authentication: 5070 * - When the full EAP handshake completes over the 5071 * Authentication process, the responder sets the 5072 * Status Code to WLAN_STATUS_8021X_AUTH_SUCCESS as 5073 * specified in "IEEE P802.11bi/D4.0, 12.16.5". 5074 * 5075 * - In the PMKSA caching case, only two Authentication 5076 * frames are exchanged if the responder (e.g., AP) 5077 * identifies a valid PMKSA, then as specified in 5078 * "IEEE P802.11bi/D4.0, 12.16.8.3", the responder 5079 * shall set the Status Code to SUCCESS in the final 5080 * Authentication frame and must not include an 5081 * encapsulated EAPOL PDU. 5082 * 5083 * Both conditions are treated as successful 5084 * authentication, so mark the state to Authenticated. 5085 */ 5086 if (status_code != WLAN_STATUS_8021X_AUTH_SUCCESS && 5087 !(status_code == WLAN_STATUS_SUCCESS && 5088 encap_len == 0)) 5089 break; 5090 fallthrough; 5091 default: 5092 if (!ieee80211_mark_sta_auth(sdata)) 5093 return; /* ignore frame -- wait for timeout */ 5094 5095 break; 5096 } 5097 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5098 auth_transaction == 1) { 5099 sae_need_confirm = true; 5100 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5101 auth_transaction == 2) { 5102 sdata_info(sdata, "SAE peer confirmed\n"); 5103 ifmgd->auth_data->peer_confirmed = true; 5104 } 5105 5106 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5107 notify_driver: 5108 if (!sae_need_confirm) 5109 drv_mgd_complete_tx(sdata->local, sdata, &info); 5110 } 5111 5112 #define case_WLAN(type) \ 5113 case WLAN_REASON_##type: return #type 5114 5115 const char *ieee80211_get_reason_code_string(u16 reason_code) 5116 { 5117 switch (reason_code) { 5118 case_WLAN(UNSPECIFIED); 5119 case_WLAN(PREV_AUTH_NOT_VALID); 5120 case_WLAN(DEAUTH_LEAVING); 5121 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 5122 case_WLAN(DISASSOC_AP_BUSY); 5123 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 5124 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 5125 case_WLAN(DISASSOC_STA_HAS_LEFT); 5126 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 5127 case_WLAN(DISASSOC_BAD_POWER); 5128 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 5129 case_WLAN(INVALID_IE); 5130 case_WLAN(MIC_FAILURE); 5131 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 5132 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 5133 case_WLAN(IE_DIFFERENT); 5134 case_WLAN(INVALID_GROUP_CIPHER); 5135 case_WLAN(INVALID_PAIRWISE_CIPHER); 5136 case_WLAN(INVALID_AKMP); 5137 case_WLAN(UNSUPP_RSN_VERSION); 5138 case_WLAN(INVALID_RSN_IE_CAP); 5139 case_WLAN(IEEE8021X_FAILED); 5140 case_WLAN(CIPHER_SUITE_REJECTED); 5141 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 5142 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 5143 case_WLAN(DISASSOC_LOW_ACK); 5144 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 5145 case_WLAN(QSTA_LEAVE_QBSS); 5146 case_WLAN(QSTA_NOT_USE); 5147 case_WLAN(QSTA_REQUIRE_SETUP); 5148 case_WLAN(QSTA_TIMEOUT); 5149 case_WLAN(QSTA_CIPHER_NOT_SUPP); 5150 case_WLAN(MESH_PEER_CANCELED); 5151 case_WLAN(MESH_MAX_PEERS); 5152 case_WLAN(MESH_CONFIG); 5153 case_WLAN(MESH_CLOSE); 5154 case_WLAN(MESH_MAX_RETRIES); 5155 case_WLAN(MESH_CONFIRM_TIMEOUT); 5156 case_WLAN(MESH_INVALID_GTK); 5157 case_WLAN(MESH_INCONSISTENT_PARAM); 5158 case_WLAN(MESH_INVALID_SECURITY); 5159 case_WLAN(MESH_PATH_ERROR); 5160 case_WLAN(MESH_PATH_NOFORWARD); 5161 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5162 case_WLAN(MAC_EXISTS_IN_MBSS); 5163 case_WLAN(MESH_CHAN_REGULATORY); 5164 case_WLAN(MESH_CHAN); 5165 default: return "<unknown>"; 5166 } 5167 } 5168 5169 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5170 struct ieee80211_mgmt *mgmt, size_t len) 5171 { 5172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5173 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5174 5175 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5176 5177 if (len < 24 + 2) 5178 return; 5179 5180 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5181 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5182 return; 5183 } 5184 5185 if (ifmgd->associated && 5186 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5187 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5188 sdata->vif.cfg.ap_addr, reason_code, 5189 ieee80211_get_reason_code_string(reason_code)); 5190 5191 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5192 5193 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5194 reason_code, false); 5195 return; 5196 } 5197 5198 if (ifmgd->assoc_data && 5199 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5200 sdata_info(sdata, 5201 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5202 ifmgd->assoc_data->ap_addr, reason_code, 5203 ieee80211_get_reason_code_string(reason_code)); 5204 5205 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5206 5207 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5208 return; 5209 } 5210 } 5211 5212 5213 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5214 struct ieee80211_mgmt *mgmt, size_t len) 5215 { 5216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5217 u16 reason_code; 5218 5219 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5220 5221 if (len < 24 + 2) 5222 return; 5223 5224 if (!ifmgd->associated || 5225 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5226 return; 5227 5228 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5229 5230 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5231 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5232 return; 5233 } 5234 5235 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5236 sdata->vif.cfg.ap_addr, reason_code, 5237 ieee80211_get_reason_code_string(reason_code)); 5238 5239 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5240 5241 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5242 false); 5243 } 5244 5245 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5246 struct ieee80211_supported_band *sband, 5247 const struct link_sta_info *link_sta, 5248 const struct ieee802_11_elems *elems) 5249 { 5250 const struct ieee80211_sta_he_cap *own_he_cap = 5251 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5252 5253 if (elems->ext_capab_len < 10) 5254 return false; 5255 5256 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5257 return false; 5258 5259 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5260 IEEE80211_HE_MAC_CAP0_TWT_RES && 5261 own_he_cap && 5262 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5263 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5264 } 5265 5266 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5267 struct ieee80211_supported_band *sband, 5268 struct ieee80211_link_data *link, 5269 struct link_sta_info *link_sta, 5270 struct ieee802_11_elems *elems) 5271 { 5272 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5273 5274 if (link->conf->twt_requester != twt) { 5275 link->conf->twt_requester = twt; 5276 return BSS_CHANGED_TWT; 5277 } 5278 return 0; 5279 } 5280 5281 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5282 struct ieee80211_bss_conf *bss_conf, 5283 struct ieee80211_supported_band *sband, 5284 struct link_sta_info *link_sta) 5285 { 5286 const struct ieee80211_sta_he_cap *own_he_cap = 5287 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5288 5289 return bss_conf->he_support && 5290 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5291 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5292 own_he_cap && 5293 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5294 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5295 } 5296 5297 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5298 bool enabled) 5299 { 5300 /* in any case this is called, dialog token should be reset */ 5301 sdata->u.mgd.epcs.dialog_token = 0; 5302 5303 if (sdata->u.mgd.epcs.enabled == enabled) 5304 return; 5305 5306 sdata->u.mgd.epcs.enabled = enabled; 5307 cfg80211_epcs_changed(sdata->dev, enabled); 5308 } 5309 5310 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5311 { 5312 struct ieee80211_local *local = sdata->local; 5313 u8 link_id; 5314 5315 if (!sdata->u.mgd.epcs.enabled) 5316 return; 5317 5318 lockdep_assert_wiphy(local->hw.wiphy); 5319 5320 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5321 struct ieee802_11_elems *elems; 5322 struct ieee80211_link_data *link; 5323 const struct cfg80211_bss_ies *ies; 5324 bool ret; 5325 5326 rcu_read_lock(); 5327 5328 link = sdata_dereference(sdata->link[link_id], sdata); 5329 if (!link || !link->conf || !link->conf->bss) { 5330 rcu_read_unlock(); 5331 continue; 5332 } 5333 5334 if (link->u.mgd.disable_wmm_tracking) { 5335 rcu_read_unlock(); 5336 ieee80211_set_wmm_default(link, false, false); 5337 continue; 5338 } 5339 5340 ies = rcu_dereference(link->conf->bss->beacon_ies); 5341 if (!ies) { 5342 rcu_read_unlock(); 5343 ieee80211_set_wmm_default(link, false, false); 5344 continue; 5345 } 5346 5347 elems = ieee802_11_parse_elems(ies->data, ies->len, 5348 IEEE80211_FTYPE_MGMT | 5349 IEEE80211_STYPE_BEACON, 5350 NULL); 5351 if (!elems) { 5352 rcu_read_unlock(); 5353 ieee80211_set_wmm_default(link, false, false); 5354 continue; 5355 } 5356 5357 ret = _ieee80211_sta_wmm_params(local, link, 5358 elems->wmm_param, 5359 elems->wmm_param_len, 5360 elems->mu_edca_param_set); 5361 5362 kfree(elems); 5363 rcu_read_unlock(); 5364 5365 if (!ret) { 5366 ieee80211_set_wmm_default(link, false, false); 5367 continue; 5368 } 5369 5370 ieee80211_mgd_set_link_qos_params(link); 5371 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5372 } 5373 } 5374 5375 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5376 struct link_sta_info *link_sta, 5377 struct cfg80211_bss *cbss, 5378 struct ieee80211_mgmt *mgmt, 5379 const u8 *elem_start, 5380 unsigned int elem_len, 5381 u64 *changed) 5382 { 5383 struct ieee80211_sub_if_data *sdata = link->sdata; 5384 struct ieee80211_mgd_assoc_data *assoc_data = 5385 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5386 struct ieee80211_bss_conf *bss_conf = link->conf; 5387 struct ieee80211_local *local = sdata->local; 5388 unsigned int link_id = link->link_id; 5389 struct ieee80211_elems_parse_params parse_params = { 5390 .mode = link->u.mgd.conn.mode, 5391 .start = elem_start, 5392 .len = elem_len, 5393 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5394 .from_ap = true, 5395 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5396 }; 5397 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5398 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5399 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5400 const struct cfg80211_bss_ies *bss_ies = NULL; 5401 struct ieee80211_supported_band *sband; 5402 struct ieee802_11_elems *elems; 5403 const __le16 prof_bss_param_ch_present = 5404 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5405 u16 capab_info; 5406 bool ret; 5407 5408 elems = ieee802_11_parse_elems_full(&parse_params); 5409 if (!elems) 5410 return false; 5411 5412 if (link_id == assoc_data->assoc_link_id) { 5413 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5414 5415 /* 5416 * we should not get to this flow unless the association was 5417 * successful, so set the status directly to success 5418 */ 5419 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5420 if (elems->ml_basic) { 5421 int bss_param_ch_cnt = 5422 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5423 5424 if (bss_param_ch_cnt < 0) { 5425 ret = false; 5426 goto out; 5427 } 5428 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5429 bss_conf->bss_param_ch_cnt_link_id = link_id; 5430 } 5431 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5432 !elems->prof || 5433 !(elems->prof->control & prof_bss_param_ch_present)) { 5434 ret = false; 5435 goto out; 5436 } else { 5437 const u8 *ptr = elems->prof->variable + 5438 elems->prof->sta_info_len - 1; 5439 int bss_param_ch_cnt; 5440 5441 /* 5442 * During parsing, we validated that these fields exist, 5443 * otherwise elems->prof would have been set to NULL. 5444 */ 5445 capab_info = get_unaligned_le16(ptr); 5446 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5447 bss_param_ch_cnt = 5448 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5449 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5450 bss_conf->bss_param_ch_cnt_link_id = link_id; 5451 5452 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5453 link_info(link, "association response status code=%u\n", 5454 assoc_data->link[link_id].status); 5455 ret = true; 5456 goto out; 5457 } 5458 } 5459 5460 if (!is_s1g && !elems->supp_rates) { 5461 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5462 ret = false; 5463 goto out; 5464 } 5465 5466 link->u.mgd.tdls_chan_switch_prohibited = 5467 elems->ext_capab && elems->ext_capab_len >= 5 && 5468 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5469 5470 /* 5471 * Some APs are erroneously not including some information in their 5472 * (re)association response frames. Try to recover by using the data 5473 * from the beacon or probe response. This seems to afflict mobile 5474 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5475 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5476 */ 5477 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5478 ((assoc_data->wmm && !elems->wmm_param) || 5479 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5480 (!elems->ht_cap_elem || !elems->ht_operation)) || 5481 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5482 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5483 const struct cfg80211_bss_ies *ies; 5484 struct ieee802_11_elems *bss_elems; 5485 5486 rcu_read_lock(); 5487 ies = rcu_dereference(cbss->ies); 5488 if (ies) 5489 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5490 GFP_ATOMIC); 5491 rcu_read_unlock(); 5492 if (!bss_ies) { 5493 ret = false; 5494 goto out; 5495 } 5496 5497 parse_params.start = bss_ies->data; 5498 parse_params.len = bss_ies->len; 5499 parse_params.bss = cbss; 5500 parse_params.link_id = -1; 5501 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5502 if (!bss_elems) { 5503 ret = false; 5504 goto out; 5505 } 5506 5507 if (assoc_data->wmm && 5508 !elems->wmm_param && bss_elems->wmm_param) { 5509 elems->wmm_param = bss_elems->wmm_param; 5510 sdata_info(sdata, 5511 "AP bug: WMM param missing from AssocResp\n"); 5512 } 5513 5514 /* 5515 * Also check if we requested HT/VHT, otherwise the AP doesn't 5516 * have to include the IEs in the (re)association response. 5517 */ 5518 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5519 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5520 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5521 sdata_info(sdata, 5522 "AP bug: HT capability missing from AssocResp\n"); 5523 } 5524 if (!elems->ht_operation && bss_elems->ht_operation && 5525 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5526 elems->ht_operation = bss_elems->ht_operation; 5527 sdata_info(sdata, 5528 "AP bug: HT operation missing from AssocResp\n"); 5529 } 5530 5531 if (is_5ghz) { 5532 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5533 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5534 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5535 sdata_info(sdata, 5536 "AP bug: VHT capa missing from AssocResp\n"); 5537 } 5538 5539 if (!elems->vht_operation && bss_elems->vht_operation && 5540 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5541 elems->vht_operation = bss_elems->vht_operation; 5542 sdata_info(sdata, 5543 "AP bug: VHT operation missing from AssocResp\n"); 5544 } 5545 } 5546 kfree(bss_elems); 5547 } 5548 5549 /* 5550 * We previously checked these in the beacon/probe response, so 5551 * they should be present here. This is just a safety net. 5552 * Note that the ieee80211_config_bw() below would also check 5553 * for this (and more), but this has better error reporting. 5554 */ 5555 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5556 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5557 sdata_info(sdata, 5558 "HT AP is missing WMM params or HT capability/operation\n"); 5559 ret = false; 5560 goto out; 5561 } 5562 5563 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5564 (!elems->vht_cap_elem || !elems->vht_operation)) { 5565 sdata_info(sdata, 5566 "VHT AP is missing VHT capability/operation\n"); 5567 ret = false; 5568 goto out; 5569 } 5570 5571 /* check/update if AP changed anything in assoc response vs. scan */ 5572 if (ieee80211_config_bw(link, elems, 5573 link_id == assoc_data->assoc_link_id, 5574 changed, 5575 le16_to_cpu(mgmt->frame_control) & 5576 IEEE80211_FCTL_STYPE)) { 5577 ret = false; 5578 goto out; 5579 } 5580 5581 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5582 ret = false; 5583 goto out; 5584 } 5585 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5586 5587 /* Set up internal HT/VHT capabilities */ 5588 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5589 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5590 elems->ht_cap_elem, 5591 link_sta); 5592 5593 if (elems->vht_cap_elem && 5594 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5595 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5596 const struct cfg80211_bss_ies *ies; 5597 5598 /* 5599 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5600 * too large maximum MPDU length in the association response 5601 * (indicating 12k) that it cannot actually process ... 5602 * Work around that. 5603 */ 5604 rcu_read_lock(); 5605 ies = rcu_dereference(cbss->ies); 5606 if (ies) { 5607 const struct element *elem; 5608 5609 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5610 ies->data, ies->len); 5611 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5612 bss_vht_cap = (const void *)elem->data; 5613 } 5614 5615 if (ieee80211_hw_check(&local->hw, STRICT) && 5616 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5617 sizeof(*bss_vht_cap)))) { 5618 rcu_read_unlock(); 5619 ret = false; 5620 link_info(link, "VHT capabilities mismatch\n"); 5621 goto out; 5622 } 5623 5624 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5625 elems->vht_cap_elem, 5626 bss_vht_cap, link_sta); 5627 rcu_read_unlock(); 5628 } 5629 5630 if (elems->he_operation && 5631 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5632 elems->he_cap) { 5633 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5634 elems->he_cap, 5635 elems->he_cap_len, 5636 elems->he_6ghz_capa, 5637 link_sta); 5638 5639 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5640 if (elems->rsnx && elems->rsnx_len && 5641 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5642 wiphy_ext_feature_isset(local->hw.wiphy, 5643 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5644 bss_conf->twt_protected = true; 5645 else 5646 bss_conf->twt_protected = false; 5647 5648 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5649 link_sta, elems); 5650 5651 if (elems->eht_operation && elems->eht_cap && 5652 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5653 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5654 elems->he_cap, 5655 elems->he_cap_len, 5656 elems->eht_cap, 5657 elems->eht_cap_len, 5658 link_sta); 5659 5660 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5661 bss_conf->epcs_support = bss_conf->eht_support && 5662 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5663 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5664 5665 /* EPCS might be already enabled but a new added link 5666 * does not support EPCS. This should not really happen 5667 * in practice. 5668 */ 5669 if (sdata->u.mgd.epcs.enabled && 5670 !bss_conf->epcs_support) 5671 ieee80211_epcs_teardown(sdata); 5672 } else { 5673 bss_conf->eht_support = false; 5674 bss_conf->epcs_support = false; 5675 } 5676 } else { 5677 bss_conf->he_support = false; 5678 bss_conf->twt_requester = false; 5679 bss_conf->twt_protected = false; 5680 bss_conf->eht_support = false; 5681 bss_conf->epcs_support = false; 5682 } 5683 5684 if (elems->uhr_operation && elems->uhr_cap && 5685 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_UHR) { 5686 ieee80211_uhr_cap_ie_to_sta_uhr_cap(sdata, sband, 5687 elems->uhr_cap, 5688 elems->uhr_cap_len, 5689 link_sta); 5690 5691 bss_conf->uhr_support = link_sta->pub->uhr_cap.has_uhr; 5692 } else { 5693 bss_conf->uhr_support = false; 5694 } 5695 5696 if (elems->s1g_oper && 5697 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5698 elems->s1g_capab) 5699 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5700 link_sta); 5701 5702 bss_conf->twt_broadcast = 5703 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5704 5705 if (bss_conf->he_support) { 5706 bss_conf->he_bss_color.color = 5707 le32_get_bits(elems->he_operation->he_oper_params, 5708 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5709 bss_conf->he_bss_color.partial = 5710 le32_get_bits(elems->he_operation->he_oper_params, 5711 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5712 bss_conf->he_bss_color.enabled = 5713 !le32_get_bits(elems->he_operation->he_oper_params, 5714 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5715 5716 if (bss_conf->he_bss_color.enabled) 5717 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5718 5719 bss_conf->htc_trig_based_pkt_ext = 5720 le32_get_bits(elems->he_operation->he_oper_params, 5721 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5722 bss_conf->frame_time_rts_th = 5723 le32_get_bits(elems->he_operation->he_oper_params, 5724 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5725 5726 bss_conf->uora_exists = !!elems->uora_element; 5727 if (elems->uora_element) 5728 bss_conf->uora_ocw_range = elems->uora_element[0]; 5729 5730 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5731 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5732 /* TODO: OPEN: what happens if BSS color disable is set? */ 5733 } 5734 5735 if (cbss->transmitted_bss) { 5736 bss_conf->nontransmitted = true; 5737 ether_addr_copy(bss_conf->transmitter_bssid, 5738 cbss->transmitted_bss->bssid); 5739 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5740 bss_conf->bssid_index = cbss->bssid_index; 5741 } 5742 5743 /* 5744 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5745 * in their association response, so ignore that data for our own 5746 * configuration. If it changed since the last beacon, we'll get the 5747 * next beacon and update then. 5748 */ 5749 5750 /* 5751 * If an operating mode notification IE is present, override the 5752 * NSS calculation (that would be done in rate_control_rate_init()) 5753 * and use the # of streams from that element. 5754 */ 5755 if (elems->opmode_notif && 5756 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5757 u8 nss; 5758 5759 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5760 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5761 nss += 1; 5762 link_sta->pub->rx_nss = nss; 5763 } 5764 5765 /* 5766 * Always handle WMM once after association regardless 5767 * of the first value the AP uses. Setting -1 here has 5768 * that effect because the AP values is an unsigned 5769 * 4-bit value. 5770 */ 5771 link->u.mgd.wmm_last_param_set = -1; 5772 link->u.mgd.mu_edca_last_param_set = -1; 5773 5774 if (link->u.mgd.disable_wmm_tracking) { 5775 ieee80211_set_wmm_default(link, false, false); 5776 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5777 elems->wmm_param_len, 5778 elems->mu_edca_param_set)) { 5779 /* still enable QoS since we might have HT/VHT */ 5780 ieee80211_set_wmm_default(link, false, true); 5781 /* disable WMM tracking in this case to disable 5782 * tracking WMM parameter changes in the beacon if 5783 * the parameters weren't actually valid. Doing so 5784 * avoids changing parameters very strangely when 5785 * the AP is going back and forth between valid and 5786 * invalid parameters. 5787 */ 5788 link->u.mgd.disable_wmm_tracking = true; 5789 } 5790 5791 if (elems->max_idle_period_ie) { 5792 bss_conf->max_idle_period = 5793 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5794 bss_conf->protected_keep_alive = 5795 !!(elems->max_idle_period_ie->idle_options & 5796 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5797 *changed |= BSS_CHANGED_KEEP_ALIVE; 5798 } else { 5799 bss_conf->max_idle_period = 0; 5800 bss_conf->protected_keep_alive = false; 5801 } 5802 5803 /* set assoc capability (AID was already set earlier), 5804 * ieee80211_set_associated() will tell the driver */ 5805 bss_conf->assoc_capability = capab_info; 5806 5807 ret = true; 5808 out: 5809 kfree(elems); 5810 kfree(bss_ies); 5811 return ret; 5812 } 5813 5814 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5815 struct sta_info *sta, 5816 struct link_sta_info *link_sta, 5817 struct cfg80211_bss *cbss) 5818 { 5819 struct ieee80211_sub_if_data *sdata = link->sdata; 5820 struct ieee80211_local *local = sdata->local; 5821 struct ieee80211_bss *bss = (void *)cbss->priv; 5822 u32 rates = 0, basic_rates = 0; 5823 bool have_higher_than_11mbit = false; 5824 int min_rate = INT_MAX, min_rate_index = -1; 5825 struct ieee80211_supported_band *sband; 5826 5827 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5828 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5829 5830 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5831 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5832 ieee80211_s1g_sta_rate_init(sta); 5833 return 0; 5834 } 5835 5836 sband = local->hw.wiphy->bands[cbss->channel->band]; 5837 5838 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5839 NULL, 0, 5840 &rates, &basic_rates, NULL, 5841 &have_higher_than_11mbit, 5842 &min_rate, &min_rate_index); 5843 5844 /* 5845 * This used to be a workaround for basic rates missing 5846 * in the association response frame. Now that we no 5847 * longer use the basic rates from there, it probably 5848 * doesn't happen any more, but keep the workaround so 5849 * in case some *other* APs are buggy in different ways 5850 * we can connect -- with a warning. 5851 * Allow this workaround only in case the AP provided at least 5852 * one rate. 5853 */ 5854 if (min_rate_index < 0) { 5855 link_info(link, "No legacy rates in association response\n"); 5856 return -EINVAL; 5857 } else if (!basic_rates) { 5858 link_info(link, "No basic rates, using min rate instead\n"); 5859 basic_rates = BIT(min_rate_index); 5860 } 5861 5862 if (rates) 5863 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5864 else 5865 link_info(link, "No rates found, keeping mandatory only\n"); 5866 5867 link->conf->basic_rates = basic_rates; 5868 5869 /* cf. IEEE 802.11 9.2.12 */ 5870 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5871 have_higher_than_11mbit; 5872 5873 return 0; 5874 } 5875 5876 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5877 struct cfg80211_bss *cbss) 5878 { 5879 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5880 const struct element *ht_cap_elem, *vht_cap_elem; 5881 const struct cfg80211_bss_ies *ies; 5882 const struct ieee80211_ht_cap *ht_cap; 5883 const struct ieee80211_vht_cap *vht_cap; 5884 const struct ieee80211_he_cap_elem *he_cap; 5885 const struct element *he_cap_elem; 5886 u16 mcs_80_map, mcs_160_map; 5887 int i, mcs_nss_size; 5888 bool support_160; 5889 u8 chains = 1; 5890 5891 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5892 return chains; 5893 5894 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5895 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5896 ht_cap = (void *)ht_cap_elem->data; 5897 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5898 /* 5899 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5900 * "Tx Unequal Modulation Supported" fields. 5901 */ 5902 } 5903 5904 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5905 return chains; 5906 5907 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5908 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5909 u8 nss; 5910 u16 tx_mcs_map; 5911 5912 vht_cap = (void *)vht_cap_elem->data; 5913 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5914 for (nss = 8; nss > 0; nss--) { 5915 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5916 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5917 break; 5918 } 5919 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5920 chains = max(chains, nss); 5921 } 5922 5923 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5924 return chains; 5925 5926 ies = rcu_dereference(cbss->ies); 5927 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5928 ies->data, ies->len); 5929 5930 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5931 return chains; 5932 5933 /* skip one byte ext_tag_id */ 5934 he_cap = (void *)(he_cap_elem->data + 1); 5935 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5936 5937 /* invalid HE IE */ 5938 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5939 return chains; 5940 5941 /* mcs_nss is right after he_cap info */ 5942 he_mcs_nss_supp = (void *)(he_cap + 1); 5943 5944 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5945 5946 for (i = 7; i >= 0; i--) { 5947 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5948 5949 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5950 chains = max_t(u8, chains, i + 1); 5951 break; 5952 } 5953 } 5954 5955 support_160 = he_cap->phy_cap_info[0] & 5956 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5957 5958 if (!support_160) 5959 return chains; 5960 5961 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5962 for (i = 7; i >= 0; i--) { 5963 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5964 5965 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5966 chains = max_t(u8, chains, i + 1); 5967 break; 5968 } 5969 } 5970 5971 return chains; 5972 } 5973 5974 static void 5975 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5976 struct ieee80211_supported_band *sband, 5977 struct cfg80211_assoc_request *req, 5978 bool wmm_used, int link_id, 5979 struct ieee80211_conn_settings *conn) 5980 { 5981 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5982 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5983 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5984 const struct ieee80211_sta_he_cap *he_cap; 5985 const struct ieee80211_sta_eht_cap *eht_cap; 5986 const struct ieee80211_sta_uhr_cap *uhr_cap; 5987 struct ieee80211_sta_vht_cap vht_cap; 5988 5989 if (sband->band == NL80211_BAND_S1GHZ) { 5990 conn->mode = IEEE80211_CONN_MODE_S1G; 5991 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5992 mlme_dbg(sdata, "operating as S1G STA\n"); 5993 return; 5994 } 5995 5996 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5997 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5998 5999 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6000 6001 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 6002 mlme_link_id_dbg(sdata, link_id, 6003 "HT disabled by flag, limiting to legacy\n"); 6004 goto out; 6005 } 6006 6007 if (!wmm_used) { 6008 mlme_link_id_dbg(sdata, link_id, 6009 "WMM/QoS not supported, limiting to legacy\n"); 6010 goto out; 6011 } 6012 6013 if (req) { 6014 unsigned int i; 6015 6016 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 6017 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6018 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6019 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6020 netdev_info(sdata->dev, 6021 "WEP/TKIP use, limiting to legacy\n"); 6022 goto out; 6023 } 6024 } 6025 } 6026 6027 if (!sta_ht_cap.ht_supported && !is_6ghz) { 6028 mlme_link_id_dbg(sdata, link_id, 6029 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 6030 goto out; 6031 } 6032 6033 /* HT is fine */ 6034 conn->mode = IEEE80211_CONN_MODE_HT; 6035 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 6036 IEEE80211_CONN_BW_LIMIT_40 : 6037 IEEE80211_CONN_BW_LIMIT_20; 6038 6039 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 6040 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 6041 6042 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 6043 mlme_link_id_dbg(sdata, link_id, 6044 "VHT disabled by flag, limiting to HT\n"); 6045 goto out; 6046 } 6047 6048 if (vht_cap.vht_supported && is_5ghz) { 6049 bool have_80mhz = false; 6050 unsigned int i; 6051 6052 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 6053 mlme_link_id_dbg(sdata, link_id, 6054 "no 40 MHz support on 5 GHz, limiting to HT\n"); 6055 goto out; 6056 } 6057 6058 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 6059 for (i = 0; i < sband->n_channels; i++) { 6060 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 6061 IEEE80211_CHAN_NO_80MHZ)) 6062 continue; 6063 6064 have_80mhz = true; 6065 break; 6066 } 6067 6068 if (!have_80mhz) { 6069 mlme_link_id_dbg(sdata, link_id, 6070 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 6071 goto out; 6072 } 6073 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 6074 mlme_link_id_dbg(sdata, link_id, 6075 "no VHT support on 5 GHz, limiting to HT\n"); 6076 goto out; 6077 } 6078 6079 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 6080 if (sband->band != NL80211_BAND_2GHZ) { 6081 conn->mode = IEEE80211_CONN_MODE_VHT; 6082 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 6083 } 6084 6085 if (is_5ghz && 6086 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 6087 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 6088 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 6089 mlme_link_id_dbg(sdata, link_id, 6090 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 6091 } 6092 6093 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 6094 mlme_link_id_dbg(sdata, link_id, 6095 "HE disabled by flag, limiting to HT/VHT\n"); 6096 goto out; 6097 } 6098 6099 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 6100 if (!he_cap) { 6101 WARN_ON(is_6ghz); 6102 mlme_link_id_dbg(sdata, link_id, 6103 "no HE support, limiting to HT/VHT\n"); 6104 goto out; 6105 } 6106 6107 /* so we have HE */ 6108 conn->mode = IEEE80211_CONN_MODE_HE; 6109 6110 /* check bandwidth */ 6111 switch (sband->band) { 6112 default: 6113 case NL80211_BAND_2GHZ: 6114 if (he_cap->he_cap_elem.phy_cap_info[0] & 6115 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 6116 break; 6117 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6118 mlme_link_id_dbg(sdata, link_id, 6119 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 6120 break; 6121 case NL80211_BAND_5GHZ: 6122 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6123 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 6124 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6125 mlme_link_id_dbg(sdata, link_id, 6126 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 6127 break; 6128 } 6129 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6130 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 6131 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6132 conn->bw_limit, 6133 IEEE80211_CONN_BW_LIMIT_80); 6134 mlme_link_id_dbg(sdata, link_id, 6135 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 6136 } 6137 break; 6138 case NL80211_BAND_6GHZ: 6139 if (he_cap->he_cap_elem.phy_cap_info[0] & 6140 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 6141 break; 6142 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6143 conn->bw_limit, 6144 IEEE80211_CONN_BW_LIMIT_80); 6145 mlme_link_id_dbg(sdata, link_id, 6146 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 6147 break; 6148 } 6149 6150 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 6151 mlme_link_id_dbg(sdata, link_id, 6152 "EHT disabled by flag, limiting to HE\n"); 6153 goto out; 6154 } 6155 6156 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 6157 if (!eht_cap) { 6158 mlme_link_id_dbg(sdata, link_id, 6159 "no EHT support, limiting to HE\n"); 6160 goto out; 6161 } 6162 conn->mode = IEEE80211_CONN_MODE_EHT; 6163 6164 /* check bandwidth */ 6165 if (is_6ghz && 6166 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 6167 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 6168 else if (is_6ghz) 6169 mlme_link_id_dbg(sdata, link_id, 6170 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6171 6172 if (req && req->flags & ASSOC_REQ_DISABLE_UHR) { 6173 mlme_link_id_dbg(sdata, link_id, 6174 "UHR disabled by flag, limiting to EHT\n"); 6175 goto out; 6176 } 6177 6178 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 6179 if (!uhr_cap) { 6180 mlme_link_id_dbg(sdata, link_id, 6181 "no UHR support, limiting to EHT\n"); 6182 goto out; 6183 } 6184 conn->mode = IEEE80211_CONN_MODE_UHR; 6185 6186 out: 6187 mlme_link_id_dbg(sdata, link_id, 6188 "determined local STA to be %s, BW limited to %d MHz\n", 6189 ieee80211_conn_mode_str(conn->mode), 6190 20 * (1 << conn->bw_limit)); 6191 } 6192 6193 static void 6194 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6195 struct ieee80211_supported_band *sband, 6196 struct cfg80211_auth_request *req, 6197 bool wmm_used, 6198 struct ieee80211_conn_settings *conn) 6199 { 6200 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6201 req->link_id > 0 ? req->link_id : 0, 6202 conn); 6203 } 6204 6205 static void 6206 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6207 struct ieee80211_supported_band *sband, 6208 struct cfg80211_assoc_request *req, 6209 bool wmm_used, int link_id, 6210 struct ieee80211_conn_settings *conn) 6211 { 6212 struct ieee80211_conn_settings tmp; 6213 6214 WARN_ON(!req); 6215 6216 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6217 &tmp); 6218 6219 conn->mode = min_t(enum ieee80211_conn_mode, 6220 conn->mode, tmp.mode); 6221 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6222 conn->bw_limit, tmp.bw_limit); 6223 } 6224 6225 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6226 struct ieee80211_link_data *link, 6227 int link_id, 6228 struct cfg80211_bss *cbss, bool mlo, 6229 struct ieee80211_conn_settings *conn, 6230 unsigned long *userspace_selectors) 6231 { 6232 struct ieee80211_local *local = sdata->local; 6233 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6234 struct ieee80211_chan_req chanreq = {}; 6235 struct cfg80211_chan_def ap_chandef; 6236 struct ieee802_11_elems *elems; 6237 int ret; 6238 6239 lockdep_assert_wiphy(local->hw.wiphy); 6240 6241 rcu_read_lock(); 6242 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6243 &chanreq, &ap_chandef, 6244 userspace_selectors); 6245 6246 if (IS_ERR(elems)) { 6247 rcu_read_unlock(); 6248 return PTR_ERR(elems); 6249 } 6250 6251 if (mlo && !elems->ml_basic) { 6252 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6253 rcu_read_unlock(); 6254 kfree(elems); 6255 return -EINVAL; 6256 } 6257 6258 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6259 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6260 6261 if (elems->pwr_constr_elem) 6262 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6263 6264 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6265 if (he_6ghz_oper) 6266 link->conf->power_type = 6267 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6268 cbss->channel->flags); 6269 else 6270 link_info(link, 6271 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6272 cbss->channel->center_freq); 6273 6274 link->conf->tpe = elems->tpe; 6275 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6276 &chanreq.oper); 6277 } 6278 rcu_read_unlock(); 6279 /* the element data was RCU protected so no longer valid anyway */ 6280 kfree(elems); 6281 elems = NULL; 6282 6283 if (!link) 6284 return 0; 6285 6286 rcu_read_lock(); 6287 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6288 local->rx_chains); 6289 rcu_read_unlock(); 6290 6291 /* 6292 * If this fails (possibly due to channel context sharing 6293 * on incompatible channels, e.g. 80+80 and 160 sharing the 6294 * same control channel) try to use a smaller bandwidth. 6295 */ 6296 ret = ieee80211_link_use_channel(link, &chanreq, 6297 IEEE80211_CHANCTX_SHARED); 6298 6299 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6300 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6301 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6302 cfg80211_chandef_is_s1g(&chanreq.oper)) 6303 return ret; 6304 6305 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6306 ieee80211_chanreq_downgrade(&chanreq, conn); 6307 6308 ret = ieee80211_link_use_channel(link, &chanreq, 6309 IEEE80211_CHANCTX_SHARED); 6310 } 6311 6312 return ret; 6313 } 6314 6315 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6316 u8 *dtim_count, u8 *dtim_period) 6317 { 6318 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6319 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6320 ies->len); 6321 const struct ieee80211_tim_ie *tim = NULL; 6322 const struct ieee80211_bssid_index *idx; 6323 bool valid = tim_ie && tim_ie[1] >= 2; 6324 6325 if (valid) 6326 tim = (void *)(tim_ie + 2); 6327 6328 if (dtim_count) 6329 *dtim_count = valid ? tim->dtim_count : 0; 6330 6331 if (dtim_period) 6332 *dtim_period = valid ? tim->dtim_period : 0; 6333 6334 /* Check if value is overridden by non-transmitted profile */ 6335 if (!idx_ie || idx_ie[1] < 3) 6336 return valid; 6337 6338 idx = (void *)(idx_ie + 2); 6339 6340 if (dtim_count) 6341 *dtim_count = idx->dtim_count; 6342 6343 if (dtim_period) 6344 *dtim_period = idx->dtim_period; 6345 6346 return true; 6347 } 6348 6349 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6350 { 6351 if (bm_size == 1) 6352 return *data; 6353 6354 return get_unaligned_le16(data); 6355 } 6356 6357 static int 6358 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6359 const struct ieee80211_ttlm_elem *ttlm, 6360 struct ieee80211_adv_ttlm_info *ttlm_info) 6361 { 6362 /* The element size was already validated in 6363 * ieee80211_tid_to_link_map_size_ok() 6364 */ 6365 u8 control, link_map_presence, map_size, tid; 6366 u8 *pos; 6367 6368 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6369 pos = (void *)ttlm->optional; 6370 control = ttlm->control; 6371 6372 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6373 IEEE80211_TTLM_DIRECTION_BOTH) { 6374 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6375 return -EINVAL; 6376 } 6377 6378 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6379 link_map_presence = *pos; 6380 pos++; 6381 } 6382 6383 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6384 ttlm_info->switch_time = get_unaligned_le16(pos); 6385 6386 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6387 * it by 1. 6388 */ 6389 if (!ttlm_info->switch_time) 6390 ttlm_info->switch_time = 1; 6391 6392 pos += 2; 6393 } 6394 6395 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6396 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6397 pos += 3; 6398 } 6399 6400 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6401 ttlm_info->map = 0xffff; 6402 return 0; 6403 } 6404 6405 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6406 map_size = 1; 6407 else 6408 map_size = 2; 6409 6410 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6411 * not advertise a TID-to-link mapping that does not map all TIDs to the 6412 * same link set, reject frame if not all links have mapping 6413 */ 6414 if (link_map_presence != 0xff) { 6415 sdata_info(sdata, 6416 "Invalid advertised T2L mapping presence indicator\n"); 6417 return -EINVAL; 6418 } 6419 6420 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6421 if (!ttlm_info->map) { 6422 sdata_info(sdata, 6423 "Invalid advertised T2L map for TID 0\n"); 6424 return -EINVAL; 6425 } 6426 6427 pos += map_size; 6428 6429 for (tid = 1; tid < 8; tid++) { 6430 u16 map = ieee80211_get_ttlm(map_size, pos); 6431 6432 if (map != ttlm_info->map) { 6433 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6434 tid); 6435 return -EINVAL; 6436 } 6437 6438 pos += map_size; 6439 } 6440 return 0; 6441 } 6442 6443 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6444 struct ieee80211_mgmt *mgmt, 6445 struct ieee802_11_elems *elems, 6446 const u8 *elem_start, unsigned int elem_len) 6447 { 6448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6449 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6450 struct ieee80211_local *local = sdata->local; 6451 unsigned int link_id; 6452 struct sta_info *sta; 6453 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6454 u16 valid_links = 0, dormant_links = 0; 6455 int err; 6456 6457 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6458 /* 6459 * station info was already allocated and inserted before 6460 * the association and should be available to us 6461 */ 6462 sta = sta_info_get(sdata, assoc_data->ap_addr); 6463 if (WARN_ON(!sta)) 6464 goto out_err; 6465 6466 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6467 6468 if (ieee80211_vif_is_mld(&sdata->vif)) { 6469 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6470 if (!assoc_data->link[link_id].bss) 6471 continue; 6472 6473 valid_links |= BIT(link_id); 6474 6475 if (link_id != assoc_data->assoc_link_id) { 6476 err = ieee80211_sta_allocate_link(sta, link_id); 6477 if (err) 6478 goto out_err; 6479 } 6480 } 6481 6482 /* 6483 * We do not support setting a negotiated TTLM during 6484 * association. As such, we can assume that if there is a TTLM, 6485 * then it is the currently active advertised TTLM. 6486 * In that case, there must be exactly one TTLM that does not 6487 * have a switch time set. This mapping should also leave us 6488 * with at least one usable link. 6489 */ 6490 if (elems->ttlm_num > 1) { 6491 sdata_info(sdata, 6492 "More than one advertised TTLM in association response\n"); 6493 goto out_err; 6494 } else if (elems->ttlm_num == 1) { 6495 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6496 &sdata->u.mgd.ttlm_info) || 6497 sdata->u.mgd.ttlm_info.switch_time != 0 || 6498 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6499 sdata_info(sdata, 6500 "Invalid advertised TTLM in association response\n"); 6501 goto out_err; 6502 } 6503 6504 sdata->u.mgd.ttlm_info.active = true; 6505 dormant_links = 6506 valid_links & ~sdata->u.mgd.ttlm_info.map; 6507 } 6508 6509 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6510 } 6511 6512 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6513 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6514 struct ieee80211_link_data *link; 6515 struct link_sta_info *link_sta; 6516 6517 if (!cbss) 6518 continue; 6519 6520 link = sdata_dereference(sdata->link[link_id], sdata); 6521 if (WARN_ON(!link)) 6522 goto out_err; 6523 6524 if (ieee80211_vif_is_mld(&sdata->vif)) 6525 link_info(link, 6526 "local address %pM, AP link address %pM%s\n", 6527 link->conf->addr, 6528 assoc_data->link[link_id].bss->bssid, 6529 link_id == assoc_data->assoc_link_id ? 6530 " (assoc)" : ""); 6531 6532 link_sta = rcu_dereference_protected(sta->link[link_id], 6533 lockdep_is_held(&local->hw.wiphy->mtx)); 6534 if (WARN_ON(!link_sta)) 6535 goto out_err; 6536 6537 if (!link->u.mgd.have_beacon) { 6538 const struct cfg80211_bss_ies *ies; 6539 6540 rcu_read_lock(); 6541 ies = rcu_dereference(cbss->beacon_ies); 6542 if (ies) 6543 link->u.mgd.have_beacon = true; 6544 else 6545 ies = rcu_dereference(cbss->ies); 6546 ieee80211_get_dtim(ies, 6547 &link->conf->sync_dtim_count, 6548 &link->u.mgd.dtim_period); 6549 link->conf->beacon_int = cbss->beacon_interval; 6550 rcu_read_unlock(); 6551 } 6552 6553 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6554 6555 if (link_id != assoc_data->assoc_link_id) { 6556 link->u.mgd.conn = assoc_data->link[link_id].conn; 6557 6558 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6559 true, &link->u.mgd.conn, 6560 sdata->u.mgd.userspace_selectors); 6561 if (err) { 6562 link_info(link, "prep_channel failed\n"); 6563 goto out_err; 6564 } 6565 } 6566 6567 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6568 assoc_data->link[link_id].bss); 6569 if (err) 6570 goto out_err; 6571 6572 if (!ieee80211_assoc_config_link(link, link_sta, 6573 assoc_data->link[link_id].bss, 6574 mgmt, elem_start, elem_len, 6575 &changed[link_id])) 6576 goto out_err; 6577 6578 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6579 valid_links &= ~BIT(link_id); 6580 ieee80211_sta_remove_link(sta, link_id); 6581 continue; 6582 } 6583 6584 if (link_id != assoc_data->assoc_link_id) { 6585 err = ieee80211_sta_activate_link(sta, link_id); 6586 if (err) 6587 goto out_err; 6588 } 6589 } 6590 6591 /* links might have changed due to rejected ones, set them again */ 6592 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6593 6594 rate_control_rate_init_all_links(sta); 6595 6596 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6597 set_sta_flag(sta, WLAN_STA_MFP); 6598 sta->sta.mfp = true; 6599 } else { 6600 sta->sta.mfp = false; 6601 } 6602 6603 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6604 elems->ext_capab_len); 6605 6606 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6607 local->hw.queues >= IEEE80211_NUM_ACS; 6608 6609 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6610 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6611 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6612 if (err) { 6613 sdata_info(sdata, 6614 "failed to move station %pM to desired state\n", 6615 sta->sta.addr); 6616 WARN_ON(__sta_info_destroy(sta)); 6617 goto out_err; 6618 } 6619 6620 if (sdata->wdev.use_4addr) 6621 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6622 6623 ieee80211_set_associated(sdata, assoc_data, changed); 6624 6625 /* 6626 * If we're using 4-addr mode, let the AP know that we're 6627 * doing so, so that it can create the STA VLAN on its side 6628 */ 6629 if (ifmgd->use_4addr) 6630 ieee80211_send_4addr_nullfunc(local, sdata); 6631 6632 /* 6633 * Start timer to probe the connection to the AP now. 6634 * Also start the timer that will detect beacon loss. 6635 */ 6636 ieee80211_sta_reset_beacon_monitor(sdata); 6637 ieee80211_sta_reset_conn_monitor(sdata); 6638 6639 return true; 6640 out_err: 6641 eth_zero_addr(sdata->vif.cfg.ap_addr); 6642 return false; 6643 } 6644 6645 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6646 struct ieee80211_mgmt *mgmt, 6647 size_t len) 6648 { 6649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6650 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6651 u16 capab_info, status_code, aid; 6652 struct ieee80211_elems_parse_params parse_params = { 6653 .bss = NULL, 6654 .link_id = -1, 6655 .from_ap = true, 6656 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6657 }; 6658 struct ieee802_11_elems *elems; 6659 int ac; 6660 const u8 *elem_start; 6661 unsigned int elem_len; 6662 bool reassoc; 6663 struct ieee80211_event event = { 6664 .type = MLME_EVENT, 6665 .u.mlme.data = ASSOC_EVENT, 6666 }; 6667 struct ieee80211_prep_tx_info info = {}; 6668 struct cfg80211_rx_assoc_resp_data resp = { 6669 .uapsd_queues = -1, 6670 }; 6671 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6672 unsigned int link_id; 6673 u16 max_aid = IEEE80211_MAX_AID; 6674 6675 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6676 6677 if (!assoc_data) 6678 return; 6679 6680 info.link_id = assoc_data->assoc_link_id; 6681 6682 parse_params.mode = 6683 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6684 6685 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6686 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6687 return; 6688 6689 /* 6690 * AssocResp and ReassocResp have identical structure, so process both 6691 * of them in this function. 6692 */ 6693 6694 if (len < 24 + 6) 6695 return; 6696 6697 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6698 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6699 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6700 if (assoc_data->s1g) { 6701 elem_start = mgmt->u.s1g_assoc_resp.variable; 6702 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6703 } else { 6704 elem_start = mgmt->u.assoc_resp.variable; 6705 } 6706 6707 /* 6708 * Note: this may not be perfect, AP might misbehave - if 6709 * anyone needs to rely on perfect complete notification 6710 * with the exact right subtype, then we need to track what 6711 * we actually transmitted. 6712 */ 6713 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6714 IEEE80211_STYPE_ASSOC_REQ; 6715 6716 if (assoc_data->fils_kek_len && 6717 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6718 return; 6719 6720 elem_len = len - (elem_start - (u8 *)mgmt); 6721 parse_params.start = elem_start; 6722 parse_params.len = elem_len; 6723 elems = ieee802_11_parse_elems_full(&parse_params); 6724 if (!elems) 6725 goto notify_driver; 6726 6727 if (elems->aid_resp) 6728 aid = le16_to_cpu(elems->aid_resp->aid); 6729 else 6730 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6731 6732 /* 6733 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6734 * an S1G STA the 3 MSBs are reserved. 6735 * (802.11-2016 9.4.1.8 AID field). 6736 */ 6737 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6738 6739 sdata_info(sdata, 6740 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6741 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6742 capab_info, status_code, aid); 6743 6744 ifmgd->broken_ap = false; 6745 6746 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6747 elems->timeout_int && 6748 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6749 u32 tu, ms; 6750 6751 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6752 le32_to_cpu(elems->timeout_int->value)); 6753 6754 tu = le32_to_cpu(elems->timeout_int->value); 6755 ms = tu * 1024 / 1000; 6756 sdata_info(sdata, 6757 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6758 assoc_data->ap_addr, tu, ms); 6759 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6760 assoc_data->timeout_started = true; 6761 assoc_data->comeback = true; 6762 if (ms > IEEE80211_ASSOC_TIMEOUT) 6763 run_again(sdata, assoc_data->timeout); 6764 goto notify_driver; 6765 } 6766 6767 if (status_code != WLAN_STATUS_SUCCESS) { 6768 sdata_info(sdata, "%pM denied association (code=%d)\n", 6769 assoc_data->ap_addr, status_code); 6770 event.u.mlme.status = MLME_DENIED; 6771 event.u.mlme.reason = status_code; 6772 drv_event_callback(sdata->local, sdata, &event); 6773 } else { 6774 if (aid == 0 || aid > max_aid) { 6775 sdata_info(sdata, 6776 "invalid AID value %d (out of range), turn off PS\n", 6777 aid); 6778 aid = 0; 6779 ifmgd->broken_ap = true; 6780 } 6781 6782 if (ieee80211_vif_is_mld(&sdata->vif)) { 6783 struct ieee80211_mle_basic_common_info *common; 6784 6785 if (!elems->ml_basic) { 6786 sdata_info(sdata, 6787 "MLO association with %pM but no (basic) multi-link element in response!\n", 6788 assoc_data->ap_addr); 6789 goto abandon_assoc; 6790 } 6791 6792 common = (void *)elems->ml_basic->variable; 6793 6794 if (memcmp(assoc_data->ap_addr, 6795 common->mld_mac_addr, ETH_ALEN)) { 6796 sdata_info(sdata, 6797 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6798 common->mld_mac_addr, 6799 assoc_data->ap_addr); 6800 goto abandon_assoc; 6801 } 6802 6803 sdata->vif.cfg.eml_cap = 6804 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6805 sdata->vif.cfg.eml_med_sync_delay = 6806 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6807 sdata->vif.cfg.mld_capa_op = 6808 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6809 } 6810 6811 sdata->vif.cfg.aid = aid; 6812 sdata->vif.cfg.s1g = assoc_data->s1g; 6813 6814 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6815 elem_start, elem_len)) { 6816 /* oops -- internal error -- send timeout for now */ 6817 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6818 goto notify_driver; 6819 } 6820 event.u.mlme.status = MLME_SUCCESS; 6821 drv_event_callback(sdata->local, sdata, &event); 6822 sdata_info(sdata, "associated\n"); 6823 6824 info.success = 1; 6825 } 6826 6827 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6828 struct ieee80211_link_data *link; 6829 6830 if (!assoc_data->link[link_id].bss) 6831 continue; 6832 6833 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6834 ether_addr_copy(resp.links[link_id].addr, 6835 assoc_data->link[link_id].addr); 6836 resp.links[link_id].status = assoc_data->link[link_id].status; 6837 6838 link = sdata_dereference(sdata->link[link_id], sdata); 6839 if (!link) 6840 continue; 6841 6842 /* get uapsd queues configuration - same for all links */ 6843 resp.uapsd_queues = 0; 6844 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6845 if (link->tx_conf[ac].uapsd) 6846 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6847 } 6848 6849 if (ieee80211_vif_is_mld(&sdata->vif)) { 6850 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6851 resp.ap_mld_addr = ap_mld_addr; 6852 } 6853 6854 ieee80211_destroy_assoc_data(sdata, 6855 status_code == WLAN_STATUS_SUCCESS ? 6856 ASSOC_SUCCESS : 6857 ASSOC_REJECTED); 6858 6859 resp.buf = (u8 *)mgmt; 6860 resp.len = len; 6861 resp.req_ies = ifmgd->assoc_req_ies; 6862 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6863 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6864 notify_driver: 6865 drv_mgd_complete_tx(sdata->local, sdata, &info); 6866 kfree(elems); 6867 return; 6868 abandon_assoc: 6869 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6870 goto notify_driver; 6871 } 6872 6873 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6874 struct ieee80211_mgmt *mgmt, size_t len, 6875 struct ieee80211_rx_status *rx_status) 6876 { 6877 struct ieee80211_sub_if_data *sdata = link->sdata; 6878 struct ieee80211_local *local = sdata->local; 6879 struct ieee80211_bss *bss; 6880 struct ieee80211_channel *channel; 6881 6882 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6883 6884 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6885 ieee80211_rx_status_to_khz(rx_status)); 6886 if (!channel) 6887 return; 6888 6889 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6890 if (bss) { 6891 link->conf->beacon_rate = bss->beacon_rate; 6892 ieee80211_rx_bss_put(local, bss); 6893 } 6894 } 6895 6896 6897 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6898 struct sk_buff *skb) 6899 { 6900 struct ieee80211_sub_if_data *sdata = link->sdata; 6901 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6902 struct ieee80211_if_managed *ifmgd; 6903 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6904 struct ieee80211_channel *channel; 6905 size_t baselen, len = skb->len; 6906 6907 ifmgd = &sdata->u.mgd; 6908 6909 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6910 6911 /* 6912 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6913 * "If a 6 GHz AP receives a Probe Request frame and responds with 6914 * a Probe Response frame [..], the Address 1 field of the Probe 6915 * Response frame shall be set to the broadcast address [..]" 6916 * So, on 6GHz band we should also accept broadcast responses. 6917 */ 6918 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6919 ieee80211_rx_status_to_khz(rx_status)); 6920 if (!channel) 6921 return; 6922 6923 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6924 (channel->band != NL80211_BAND_6GHZ || 6925 !is_broadcast_ether_addr(mgmt->da))) 6926 return; /* ignore ProbeResp to foreign address */ 6927 6928 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6929 if (baselen > len) 6930 return; 6931 6932 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6933 6934 if (ifmgd->associated && 6935 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6936 ieee80211_reset_ap_probe(sdata); 6937 } 6938 6939 /* 6940 * This is the canonical list of information elements we care about, 6941 * the filter code also gives us all changes to the Microsoft OUI 6942 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6943 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6944 * changes to requested client power. 6945 * 6946 * We implement beacon filtering in software since that means we can 6947 * avoid processing the frame here and in cfg80211, and userspace 6948 * will not be able to tell whether the hardware supports it or not. 6949 * 6950 * XXX: This list needs to be dynamic -- userspace needs to be able to 6951 * add items it requires. It also needs to be able to tell us to 6952 * look out for other vendor IEs. 6953 */ 6954 static const u64 care_about_ies = 6955 (1ULL << WLAN_EID_COUNTRY) | 6956 (1ULL << WLAN_EID_ERP_INFO) | 6957 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6958 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6959 (1ULL << WLAN_EID_HT_CAPABILITY) | 6960 (1ULL << WLAN_EID_HT_OPERATION) | 6961 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6962 6963 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6964 struct ieee80211_if_managed *ifmgd, 6965 struct ieee80211_bss_conf *bss_conf, 6966 struct ieee80211_local *local, 6967 struct ieee80211_rx_status *rx_status) 6968 { 6969 struct ieee80211_sub_if_data *sdata = link->sdata; 6970 6971 /* Track average RSSI from the Beacon frames of the current AP */ 6972 6973 if (!link->u.mgd.tracking_signal_avg) { 6974 link->u.mgd.tracking_signal_avg = true; 6975 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6976 link->u.mgd.last_cqm_event_signal = 0; 6977 link->u.mgd.count_beacon_signal = 1; 6978 link->u.mgd.last_ave_beacon_signal = 0; 6979 } else { 6980 link->u.mgd.count_beacon_signal++; 6981 } 6982 6983 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6984 -rx_status->signal); 6985 6986 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6987 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6988 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6989 int last_sig = link->u.mgd.last_ave_beacon_signal; 6990 struct ieee80211_event event = { 6991 .type = RSSI_EVENT, 6992 }; 6993 6994 /* 6995 * if signal crosses either of the boundaries, invoke callback 6996 * with appropriate parameters 6997 */ 6998 if (sig > ifmgd->rssi_max_thold && 6999 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 7000 link->u.mgd.last_ave_beacon_signal = sig; 7001 event.u.rssi.data = RSSI_EVENT_HIGH; 7002 drv_event_callback(local, sdata, &event); 7003 } else if (sig < ifmgd->rssi_min_thold && 7004 (last_sig >= ifmgd->rssi_max_thold || 7005 last_sig == 0)) { 7006 link->u.mgd.last_ave_beacon_signal = sig; 7007 event.u.rssi.data = RSSI_EVENT_LOW; 7008 drv_event_callback(local, sdata, &event); 7009 } 7010 } 7011 7012 if (bss_conf->cqm_rssi_thold && 7013 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 7014 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 7015 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7016 int last_event = link->u.mgd.last_cqm_event_signal; 7017 int thold = bss_conf->cqm_rssi_thold; 7018 int hyst = bss_conf->cqm_rssi_hyst; 7019 7020 if (sig < thold && 7021 (last_event == 0 || sig < last_event - hyst)) { 7022 link->u.mgd.last_cqm_event_signal = sig; 7023 ieee80211_cqm_rssi_notify( 7024 &sdata->vif, 7025 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7026 sig, GFP_KERNEL); 7027 } else if (sig > thold && 7028 (last_event == 0 || sig > last_event + hyst)) { 7029 link->u.mgd.last_cqm_event_signal = sig; 7030 ieee80211_cqm_rssi_notify( 7031 &sdata->vif, 7032 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7033 sig, GFP_KERNEL); 7034 } 7035 } 7036 7037 if (bss_conf->cqm_rssi_low && 7038 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7039 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7040 int last_event = link->u.mgd.last_cqm_event_signal; 7041 int low = bss_conf->cqm_rssi_low; 7042 int high = bss_conf->cqm_rssi_high; 7043 7044 if (sig < low && 7045 (last_event == 0 || last_event >= low)) { 7046 link->u.mgd.last_cqm_event_signal = sig; 7047 ieee80211_cqm_rssi_notify( 7048 &sdata->vif, 7049 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7050 sig, GFP_KERNEL); 7051 } else if (sig > high && 7052 (last_event == 0 || last_event <= high)) { 7053 link->u.mgd.last_cqm_event_signal = sig; 7054 ieee80211_cqm_rssi_notify( 7055 &sdata->vif, 7056 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7057 sig, GFP_KERNEL); 7058 } 7059 } 7060 } 7061 7062 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 7063 struct cfg80211_bss *bss) 7064 { 7065 if (ether_addr_equal(tx_bssid, bss->bssid)) 7066 return true; 7067 if (!bss->transmitted_bss) 7068 return false; 7069 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 7070 } 7071 7072 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 7073 struct wiphy_work *work) 7074 { 7075 struct ieee80211_sub_if_data *sdata = 7076 container_of(work, struct ieee80211_sub_if_data, 7077 u.mgd.ml_reconf_work.work); 7078 u16 new_valid_links, new_active_links, new_dormant_links; 7079 struct sta_info *sta; 7080 int ret; 7081 7082 if (!sdata->u.mgd.removed_links) 7083 return; 7084 7085 sdata_info(sdata, 7086 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 7087 sdata->vif.valid_links, sdata->u.mgd.removed_links); 7088 7089 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 7090 if (new_valid_links == sdata->vif.valid_links) 7091 return; 7092 7093 if (!new_valid_links || 7094 !(new_valid_links & ~sdata->vif.dormant_links)) { 7095 sdata_info(sdata, "No valid links after reconfiguration\n"); 7096 ret = -EINVAL; 7097 goto out; 7098 } 7099 7100 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 7101 if (new_active_links != sdata->vif.active_links) { 7102 if (!new_active_links) 7103 new_active_links = 7104 BIT(ffs(new_valid_links & 7105 ~sdata->vif.dormant_links) - 1); 7106 7107 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 7108 if (ret) { 7109 sdata_info(sdata, 7110 "Failed setting active links\n"); 7111 goto out; 7112 } 7113 } 7114 7115 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7116 if (sta) { 7117 unsigned long removed_links = sdata->u.mgd.removed_links; 7118 unsigned int link_id; 7119 7120 for_each_set_bit(link_id, &removed_links, 7121 IEEE80211_MLD_MAX_NUM_LINKS) 7122 ieee80211_sta_remove_link(sta, link_id); 7123 } 7124 7125 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 7126 7127 ret = ieee80211_vif_set_links(sdata, new_valid_links, 7128 new_dormant_links); 7129 if (ret) 7130 sdata_info(sdata, "Failed setting valid links\n"); 7131 7132 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 7133 7134 out: 7135 if (!ret) 7136 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 7137 else 7138 __ieee80211_disconnect(sdata); 7139 7140 sdata->u.mgd.removed_links = 0; 7141 } 7142 7143 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 7144 struct ieee802_11_elems *elems) 7145 { 7146 const struct element *sub; 7147 unsigned long removed_links = 0; 7148 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7149 u8 link_id; 7150 u32 delay; 7151 7152 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 7153 return; 7154 7155 /* Directly parse the sub elements as the common information doesn't 7156 * hold any useful information. 7157 */ 7158 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 7159 elems->ml_reconf_len) { 7160 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7161 u8 *pos = prof->variable; 7162 u16 control; 7163 7164 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 7165 continue; 7166 7167 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 7168 sub->datalen)) 7169 return; 7170 7171 control = le16_to_cpu(prof->control); 7172 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 7173 7174 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7175 continue; 7176 7177 removed_links |= BIT(link_id); 7178 7179 /* the MAC address should not be included, but handle it */ 7180 if (control & 7181 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 7182 pos += 6; 7183 7184 /* According to Draft P802.11be_D3.0, the control should 7185 * include the AP Removal Timer present. If the AP Removal Timer 7186 * is not present assume immediate removal. 7187 */ 7188 if (control & 7189 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 7190 link_removal_timeout[link_id] = get_unaligned_le16(pos); 7191 } 7192 7193 removed_links &= sdata->vif.valid_links; 7194 if (!removed_links) { 7195 /* In case the removal was cancelled, abort it */ 7196 if (sdata->u.mgd.removed_links) { 7197 sdata->u.mgd.removed_links = 0; 7198 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7199 &sdata->u.mgd.ml_reconf_work); 7200 } 7201 return; 7202 } 7203 7204 delay = 0; 7205 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7206 struct ieee80211_bss_conf *link_conf = 7207 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7208 u32 link_delay; 7209 7210 if (!link_conf) { 7211 removed_links &= ~BIT(link_id); 7212 continue; 7213 } 7214 7215 if (link_removal_timeout[link_id] < 1) 7216 link_delay = 0; 7217 else 7218 link_delay = link_conf->beacon_int * 7219 (link_removal_timeout[link_id] - 1); 7220 7221 if (!delay) 7222 delay = link_delay; 7223 else 7224 delay = min(delay, link_delay); 7225 } 7226 7227 sdata->u.mgd.removed_links = removed_links; 7228 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7229 &sdata->u.mgd.ml_reconf_work, 7230 us_to_ktime(ieee80211_tu_to_usec(delay))); 7231 } 7232 7233 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7234 u16 active_links, u16 dormant_links, 7235 u16 suspended_links) 7236 { 7237 u64 changed = 0; 7238 int ret; 7239 7240 if (!active_links) { 7241 ret = -EINVAL; 7242 goto out; 7243 } 7244 7245 /* If there is an active negotiated TTLM, it should be discarded by 7246 * the new negotiated/advertised TTLM. 7247 */ 7248 if (sdata->vif.neg_ttlm.valid) { 7249 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7250 sdata->vif.suspended_links = 0; 7251 changed = BSS_CHANGED_MLD_TTLM; 7252 } 7253 7254 if (sdata->vif.active_links != active_links) { 7255 /* usable links are affected when active_links are changed, 7256 * so notify the driver about the status change 7257 */ 7258 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7259 active_links &= sdata->vif.active_links; 7260 if (!active_links) 7261 active_links = 7262 BIT(__ffs(sdata->vif.valid_links & 7263 ~dormant_links)); 7264 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7265 if (ret) { 7266 sdata_info(sdata, "Failed to set TTLM active links\n"); 7267 goto out; 7268 } 7269 } 7270 7271 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7272 dormant_links); 7273 if (ret) { 7274 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7275 goto out; 7276 } 7277 7278 sdata->vif.suspended_links = suspended_links; 7279 if (sdata->vif.suspended_links) 7280 changed |= BSS_CHANGED_MLD_TTLM; 7281 7282 ieee80211_vif_cfg_change_notify(sdata, changed); 7283 7284 out: 7285 if (ret) 7286 ieee80211_disconnect(&sdata->vif, false); 7287 7288 return ret; 7289 } 7290 7291 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7292 struct wiphy_work *work) 7293 { 7294 u16 new_active_links, new_dormant_links; 7295 struct ieee80211_sub_if_data *sdata = 7296 container_of(work, struct ieee80211_sub_if_data, 7297 u.mgd.ttlm_work.work); 7298 7299 new_active_links = sdata->u.mgd.ttlm_info.map & 7300 sdata->vif.valid_links; 7301 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7302 sdata->vif.valid_links; 7303 7304 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7305 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7306 0)) 7307 return; 7308 7309 sdata->u.mgd.ttlm_info.active = true; 7310 sdata->u.mgd.ttlm_info.switch_time = 0; 7311 } 7312 7313 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7314 struct ieee802_11_elems *elems, 7315 u64 beacon_ts) 7316 { 7317 u8 i; 7318 int ret; 7319 7320 if (!ieee80211_vif_is_mld(&sdata->vif)) 7321 return; 7322 7323 if (!elems->ttlm_num) { 7324 if (sdata->u.mgd.ttlm_info.switch_time) { 7325 /* if a planned TID-to-link mapping was cancelled - 7326 * abort it 7327 */ 7328 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7329 &sdata->u.mgd.ttlm_work); 7330 } else if (sdata->u.mgd.ttlm_info.active) { 7331 /* if no TID-to-link element, set to default mapping in 7332 * which all TIDs are mapped to all setup links 7333 */ 7334 ret = ieee80211_vif_set_links(sdata, 7335 sdata->vif.valid_links, 7336 0); 7337 if (ret) { 7338 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7339 return; 7340 } 7341 ieee80211_vif_cfg_change_notify(sdata, 7342 BSS_CHANGED_MLD_VALID_LINKS); 7343 } 7344 memset(&sdata->u.mgd.ttlm_info, 0, 7345 sizeof(sdata->u.mgd.ttlm_info)); 7346 return; 7347 } 7348 7349 for (i = 0; i < elems->ttlm_num; i++) { 7350 struct ieee80211_adv_ttlm_info ttlm_info; 7351 u32 res; 7352 7353 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7354 &ttlm_info); 7355 7356 if (res) { 7357 __ieee80211_disconnect(sdata); 7358 return; 7359 } 7360 7361 if (ttlm_info.switch_time) { 7362 u16 beacon_ts_tu, st_tu, delay; 7363 u64 delay_usec; 7364 u64 mask; 7365 7366 /* The t2l map switch time is indicated with a partial 7367 * TSF value (bits 10 to 25), get the partial beacon TS 7368 * as well, and calc the delay to the start time. 7369 */ 7370 mask = GENMASK_ULL(25, 10); 7371 beacon_ts_tu = (beacon_ts & mask) >> 10; 7372 st_tu = ttlm_info.switch_time; 7373 delay = st_tu - beacon_ts_tu; 7374 7375 /* 7376 * If the switch time is far in the future, then it 7377 * could also be the previous switch still being 7378 * announced. 7379 * We can simply ignore it for now, if it is a future 7380 * switch the AP will continue to announce it anyway. 7381 */ 7382 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7383 return; 7384 7385 delay_usec = ieee80211_tu_to_usec(delay); 7386 7387 /* Link switching can take time, so schedule it 7388 * 100ms before to be ready on time 7389 */ 7390 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7391 delay_usec -= 7392 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7393 else 7394 delay_usec = 0; 7395 7396 sdata->u.mgd.ttlm_info = ttlm_info; 7397 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7398 &sdata->u.mgd.ttlm_work); 7399 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7400 &sdata->u.mgd.ttlm_work, 7401 us_to_ktime(delay_usec)); 7402 return; 7403 } 7404 } 7405 } 7406 7407 static void 7408 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7409 int reporting_link_id, 7410 struct ieee802_11_elems *elems) 7411 { 7412 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7413 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7414 const struct element *sub; 7415 const u8 *subelems; 7416 size_t subelems_len; 7417 u8 common_size; 7418 int link_id; 7419 7420 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7421 return; 7422 7423 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7424 subelems = (u8 *)elems->ml_basic + common_size; 7425 subelems_len = elems->ml_basic_len - common_size; 7426 7427 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7428 subelems, subelems_len) { 7429 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7430 struct ieee80211_link_data *link; 7431 ssize_t len; 7432 7433 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7434 sub->datalen)) 7435 continue; 7436 7437 link_id = le16_get_bits(prof->control, 7438 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7439 /* need a valid link ID, but also not our own, both AP bugs */ 7440 if (link_id == reporting_link_id || 7441 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7442 continue; 7443 7444 link = sdata_dereference(sdata->link[link_id], sdata); 7445 if (!link) 7446 continue; 7447 7448 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7449 NULL, 0, 7450 IEEE80211_MLE_SUBELEM_FRAGMENT); 7451 if (WARN_ON(len < 0)) 7452 continue; 7453 7454 sta_profiles[link_id] = sub; 7455 sta_profiles_len[link_id] = len; 7456 } 7457 7458 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7459 struct ieee80211_mle_per_sta_profile *prof; 7460 struct ieee802_11_elems *prof_elems; 7461 struct ieee80211_link_data *link; 7462 ssize_t len; 7463 7464 if (link_id == reporting_link_id) 7465 continue; 7466 7467 link = sdata_dereference(sdata->link[link_id], sdata); 7468 if (!link) 7469 continue; 7470 7471 if (!sta_profiles[link_id]) { 7472 prof_elems = NULL; 7473 goto handle; 7474 } 7475 7476 /* we can defragment in-place, won't use the buffer again */ 7477 len = cfg80211_defragment_element(sta_profiles[link_id], 7478 subelems, subelems_len, 7479 (void *)sta_profiles[link_id], 7480 sta_profiles_len[link_id], 7481 IEEE80211_MLE_SUBELEM_FRAGMENT); 7482 if (WARN_ON(len != sta_profiles_len[link_id])) 7483 continue; 7484 7485 prof = (void *)sta_profiles[link_id]; 7486 prof_elems = ieee802_11_parse_elems(prof->variable + 7487 (prof->sta_info_len - 1), 7488 len - 7489 (prof->sta_info_len - 1), 7490 IEEE80211_FTYPE_MGMT | 7491 IEEE80211_STYPE_BEACON, 7492 NULL); 7493 7494 /* memory allocation failed - let's hope that's transient */ 7495 if (!prof_elems) 7496 continue; 7497 7498 handle: 7499 /* 7500 * FIXME: the timings here are obviously incorrect, 7501 * but only older Intel drivers seem to care, and 7502 * those don't have MLO. If you really need this, 7503 * the problem is having to calculate it with the 7504 * TSF offset etc. The device_timestamp is still 7505 * correct, of course. 7506 */ 7507 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7508 IEEE80211_CSA_SOURCE_OTHER_LINK); 7509 kfree(prof_elems); 7510 } 7511 } 7512 7513 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7514 const struct ieee802_11_elems *elems) 7515 { 7516 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7517 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7518 7519 if (!elems->ssid) 7520 return false; 7521 7522 /* hidden SSID: zero length */ 7523 if (elems->ssid_len == 0) 7524 return false; 7525 7526 if (elems->ssid_len != cfg->ssid_len) 7527 return true; 7528 7529 /* hidden SSID: zeroed out */ 7530 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7531 return false; 7532 7533 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7534 } 7535 7536 static bool 7537 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7538 struct ieee80211_mgmt *mgmt, 7539 struct ieee80211_rx_status *rx_status, 7540 struct ieee80211_chanctx_conf *chanctx) 7541 { 7542 u32 pri_2mhz_khz; 7543 struct ieee80211_channel *s1g_sibling_1mhz; 7544 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7545 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7546 7547 if (rx_khz == pri_khz) 7548 return true; 7549 7550 if (!chanctx->def.s1g_primary_2mhz) 7551 return false; 7552 7553 /* 7554 * If we have an S1G interface with a 2MHz primary, beacons are 7555 * sent on the center frequency of the 2MHz primary. Find the sibling 7556 * 1MHz channel and calculate the 2MHz primary center frequency. 7557 */ 7558 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7559 &chanctx->def); 7560 if (!s1g_sibling_1mhz) 7561 return false; 7562 7563 pri_2mhz_khz = 7564 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7565 return rx_khz == pri_2mhz_khz; 7566 } 7567 7568 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7569 struct ieee80211_hdr *hdr, size_t len, 7570 struct ieee80211_rx_status *rx_status) 7571 { 7572 struct ieee80211_sub_if_data *sdata = link->sdata; 7573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7574 struct ieee80211_bss_conf *bss_conf = link->conf; 7575 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7576 struct ieee80211_mgmt *mgmt = (void *) hdr; 7577 struct ieee80211_ext *ext = NULL; 7578 size_t baselen; 7579 struct ieee802_11_elems *elems; 7580 struct ieee80211_local *local = sdata->local; 7581 struct ieee80211_chanctx_conf *chanctx_conf; 7582 struct ieee80211_supported_band *sband; 7583 struct ieee80211_channel *chan; 7584 struct link_sta_info *link_sta; 7585 struct sta_info *sta; 7586 u64 changed = 0; 7587 bool erp_valid; 7588 u8 erp_value = 0; 7589 u32 ncrc = 0; 7590 u8 *bssid, *variable = mgmt->u.beacon.variable; 7591 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7592 struct ieee80211_elems_parse_params parse_params = { 7593 .mode = link->u.mgd.conn.mode, 7594 .link_id = -1, 7595 .from_ap = true, 7596 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7597 }; 7598 7599 lockdep_assert_wiphy(local->hw.wiphy); 7600 7601 /* Process beacon from the current BSS */ 7602 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7603 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7604 ext = (void *)mgmt; 7605 variable = ext->u.s1g_beacon.variable + 7606 ieee80211_s1g_optional_len(ext->frame_control); 7607 } 7608 7609 baselen = (u8 *) variable - (u8 *) mgmt; 7610 if (baselen > len) 7611 return; 7612 7613 parse_params.start = variable; 7614 parse_params.len = len - baselen; 7615 7616 rcu_read_lock(); 7617 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7618 if (!chanctx_conf) { 7619 rcu_read_unlock(); 7620 return; 7621 } 7622 7623 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7624 chanctx_conf)) { 7625 rcu_read_unlock(); 7626 return; 7627 } 7628 chan = chanctx_conf->def.chan; 7629 rcu_read_unlock(); 7630 7631 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7632 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7633 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7634 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7635 elems = ieee802_11_parse_elems_full(&parse_params); 7636 if (!elems) 7637 return; 7638 7639 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7640 7641 if (elems->dtim_period) 7642 link->u.mgd.dtim_period = elems->dtim_period; 7643 link->u.mgd.have_beacon = true; 7644 ifmgd->assoc_data->need_beacon = false; 7645 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7646 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7647 bss_conf->sync_tsf = 7648 le64_to_cpu(mgmt->u.beacon.timestamp); 7649 bss_conf->sync_device_ts = 7650 rx_status->device_timestamp; 7651 bss_conf->sync_dtim_count = elems->dtim_count; 7652 } 7653 7654 if (elems->mbssid_config_ie) 7655 bss_conf->profile_periodicity = 7656 elems->mbssid_config_ie->profile_periodicity; 7657 else 7658 bss_conf->profile_periodicity = 0; 7659 7660 if (elems->ext_capab_len >= 11 && 7661 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7662 bss_conf->ema_ap = true; 7663 else 7664 bss_conf->ema_ap = false; 7665 7666 /* continue assoc process */ 7667 ifmgd->assoc_data->timeout = jiffies; 7668 ifmgd->assoc_data->timeout_started = true; 7669 run_again(sdata, ifmgd->assoc_data->timeout); 7670 kfree(elems); 7671 return; 7672 } 7673 7674 if (!ifmgd->associated || 7675 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7676 return; 7677 bssid = link->u.mgd.bssid; 7678 7679 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7680 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7681 local, rx_status); 7682 7683 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7684 mlme_dbg_ratelimited(sdata, 7685 "cancelling AP probe due to a received beacon\n"); 7686 ieee80211_reset_ap_probe(sdata); 7687 } 7688 7689 /* 7690 * Push the beacon loss detection into the future since 7691 * we are processing a beacon from the AP just now. 7692 */ 7693 ieee80211_sta_reset_beacon_monitor(sdata); 7694 7695 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7696 * element (which carries the beacon interval). Don't forget to add a 7697 * bit to care_about_ies[] above if mac80211 is interested in a 7698 * changing S1G element. 7699 */ 7700 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7701 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7702 parse_params.bss = bss_conf->bss; 7703 parse_params.filter = care_about_ies; 7704 parse_params.crc = ncrc; 7705 elems = ieee802_11_parse_elems_full(&parse_params); 7706 if (!elems) 7707 return; 7708 7709 if (rx_status->flag & RX_FLAG_DECRYPTED && 7710 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7711 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7712 sdata->vif.cfg.ap_addr); 7713 __ieee80211_disconnect(sdata); 7714 return; 7715 } 7716 7717 ncrc = elems->crc; 7718 7719 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7720 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7721 vif_cfg->s1g)) { 7722 if (local->hw.conf.dynamic_ps_timeout > 0) { 7723 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7724 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7725 ieee80211_hw_config(local, -1, 7726 IEEE80211_CONF_CHANGE_PS); 7727 } 7728 ieee80211_send_nullfunc(local, sdata, false); 7729 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7730 local->pspolling = true; 7731 7732 /* 7733 * Here is assumed that the driver will be 7734 * able to send ps-poll frame and receive a 7735 * response even though power save mode is 7736 * enabled, but some drivers might require 7737 * to disable power save here. This needs 7738 * to be investigated. 7739 */ 7740 ieee80211_send_pspoll(local, sdata); 7741 } 7742 } 7743 7744 if (sdata->vif.p2p || 7745 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7746 struct ieee80211_p2p_noa_attr noa = {}; 7747 int ret; 7748 7749 ret = cfg80211_get_p2p_attr(variable, 7750 len - baselen, 7751 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7752 (u8 *) &noa, sizeof(noa)); 7753 if (ret >= 2) { 7754 if (link->u.mgd.p2p_noa_index != noa.index) { 7755 /* valid noa_attr and index changed */ 7756 link->u.mgd.p2p_noa_index = noa.index; 7757 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7758 changed |= BSS_CHANGED_P2P_PS; 7759 /* 7760 * make sure we update all information, the CRC 7761 * mechanism doesn't look at P2P attributes. 7762 */ 7763 link->u.mgd.beacon_crc_valid = false; 7764 } 7765 } else if (link->u.mgd.p2p_noa_index != -1) { 7766 /* noa_attr not found and we had valid noa_attr before */ 7767 link->u.mgd.p2p_noa_index = -1; 7768 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7769 changed |= BSS_CHANGED_P2P_PS; 7770 link->u.mgd.beacon_crc_valid = false; 7771 } 7772 } 7773 7774 /* 7775 * Update beacon timing and dtim count on every beacon appearance. This 7776 * will allow the driver to use the most updated values. Do it before 7777 * comparing this one with last received beacon. 7778 * IMPORTANT: These parameters would possibly be out of sync by the time 7779 * the driver will use them. The synchronized view is currently 7780 * guaranteed only in certain callbacks. 7781 */ 7782 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7783 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7784 bss_conf->sync_tsf = 7785 le64_to_cpu(mgmt->u.beacon.timestamp); 7786 bss_conf->sync_device_ts = 7787 rx_status->device_timestamp; 7788 bss_conf->sync_dtim_count = elems->dtim_count; 7789 } 7790 7791 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7792 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7793 parse_params.start, 7794 parse_params.len))) 7795 goto free; 7796 link->u.mgd.beacon_crc = ncrc; 7797 link->u.mgd.beacon_crc_valid = true; 7798 7799 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7800 7801 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7802 rx_status->device_timestamp, 7803 elems, elems, 7804 IEEE80211_CSA_SOURCE_BEACON); 7805 7806 /* note that after this elems->ml_basic can no longer be used fully */ 7807 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7808 7809 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7810 7811 if (!sdata->u.mgd.epcs.enabled && 7812 !link->u.mgd.disable_wmm_tracking && 7813 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7814 elems->wmm_param_len, 7815 elems->mu_edca_param_set)) 7816 changed |= BSS_CHANGED_QOS; 7817 7818 /* 7819 * If we haven't had a beacon before, tell the driver about the 7820 * DTIM period (and beacon timing if desired) now. 7821 */ 7822 if (!link->u.mgd.have_beacon) { 7823 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7824 bss_conf->dtim_period = elems->dtim_period ?: 1; 7825 7826 changed |= BSS_CHANGED_BEACON_INFO; 7827 link->u.mgd.have_beacon = true; 7828 7829 ieee80211_recalc_ps(local); 7830 7831 ieee80211_recalc_ps_vif(sdata); 7832 } 7833 7834 if (elems->erp_info) { 7835 erp_valid = true; 7836 erp_value = elems->erp_info[0]; 7837 } else { 7838 erp_valid = false; 7839 } 7840 7841 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7842 changed |= ieee80211_handle_bss_capability(link, 7843 le16_to_cpu(mgmt->u.beacon.capab_info), 7844 erp_valid, erp_value); 7845 7846 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7847 if (WARN_ON(!sta)) { 7848 goto free; 7849 } 7850 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7851 lockdep_is_held(&local->hw.wiphy->mtx)); 7852 if (WARN_ON(!link_sta)) { 7853 goto free; 7854 } 7855 7856 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7857 goto free; 7858 7859 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7860 7861 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7862 7863 if (ieee80211_config_bw(link, elems, true, &changed, 7864 IEEE80211_STYPE_BEACON)) { 7865 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7866 WLAN_REASON_DEAUTH_LEAVING, 7867 true, deauth_buf); 7868 ieee80211_report_disconnect(sdata, deauth_buf, 7869 sizeof(deauth_buf), true, 7870 WLAN_REASON_DEAUTH_LEAVING, 7871 false); 7872 goto free; 7873 } 7874 7875 if (elems->opmode_notif) 7876 ieee80211_vht_handle_opmode(sdata, link_sta, 7877 *elems->opmode_notif, 7878 rx_status->band); 7879 7880 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7881 elems->country_elem, 7882 elems->country_elem_len, 7883 elems->pwr_constr_elem, 7884 elems->cisco_dtpc_elem); 7885 7886 ieee80211_ml_reconfiguration(sdata, elems); 7887 ieee80211_process_adv_ttlm(sdata, elems, 7888 le64_to_cpu(mgmt->u.beacon.timestamp)); 7889 7890 ieee80211_link_info_change_notify(sdata, link, changed); 7891 free: 7892 kfree(elems); 7893 } 7894 7895 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7896 struct ieee80211_neg_ttlm neg_ttlm) 7897 { 7898 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7899 u8 i; 7900 7901 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7902 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7903 7904 /* If there is an active TTLM, unset previously suspended links */ 7905 if (sdata->vif.neg_ttlm.valid) 7906 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7907 7908 /* exclude links that are already disabled by advertised TTLM */ 7909 new_active_links = 7910 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7911 new_suspended_links = 7912 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7913 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7914 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7915 new_dormant_links, new_suspended_links)) 7916 return; 7917 7918 sdata->vif.neg_ttlm = neg_ttlm; 7919 sdata->vif.neg_ttlm.valid = true; 7920 } 7921 7922 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7923 struct wiphy_work *work) 7924 { 7925 struct ieee80211_sub_if_data *sdata = 7926 container_of(work, struct ieee80211_sub_if_data, 7927 u.mgd.neg_ttlm_timeout_work.work); 7928 7929 sdata_info(sdata, 7930 "No negotiated TTLM response from AP, disconnecting.\n"); 7931 7932 __ieee80211_disconnect(sdata); 7933 } 7934 7935 static void 7936 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7937 struct ieee80211_neg_ttlm *neg_ttlm) 7938 { 7939 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7940 7941 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7942 sizeof(neg_ttlm->downlink))) { 7943 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7944 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7945 } else { 7946 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7947 } 7948 7949 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7950 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7951 __le16 map; 7952 7953 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7954 7955 pos = skb_put(skb, len + 2); 7956 *pos++ = WLAN_EID_EXTENSION; 7957 len_pos = pos++; 7958 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7959 *pos++ = direction[i]; 7960 map_ind_pos = pos++; 7961 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7962 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7963 cpu_to_le16(neg_ttlm->uplink[tid]) : 7964 cpu_to_le16(neg_ttlm->downlink[tid]); 7965 if (!map) 7966 continue; 7967 7968 len += 2; 7969 map_ind |= BIT(tid); 7970 skb_put_data(skb, &map, sizeof(map)); 7971 } 7972 7973 *map_ind_pos = map_ind; 7974 *len_pos = len; 7975 7976 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7977 break; 7978 } 7979 } 7980 7981 static void 7982 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7983 struct ieee80211_neg_ttlm *neg_ttlm, 7984 u8 dialog_token) 7985 { 7986 struct ieee80211_local *local = sdata->local; 7987 struct ieee80211_mgmt *mgmt; 7988 struct sk_buff *skb; 7989 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_req); 7990 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7991 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7992 7993 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7994 if (!skb) 7995 return; 7996 7997 skb_reserve(skb, local->tx_headroom); 7998 mgmt = skb_put_zero(skb, hdr_len); 7999 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8000 IEEE80211_STYPE_ACTION); 8001 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8002 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8003 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8004 8005 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8006 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 8007 mgmt->u.action.ttlm_req.dialog_token = dialog_token; 8008 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8009 ieee80211_tx_skb(sdata, skb); 8010 } 8011 8012 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8013 struct cfg80211_ttlm_params *params) 8014 { 8015 struct ieee80211_neg_ttlm neg_ttlm = {}; 8016 u8 i; 8017 8018 if (!ieee80211_vif_is_mld(&sdata->vif) || 8019 !(sdata->vif.cfg.mld_capa_op & 8020 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 8021 return -EINVAL; 8022 8023 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8024 if ((params->dlink[i] & ~sdata->vif.valid_links) || 8025 (params->ulink[i] & ~sdata->vif.valid_links)) 8026 return -EINVAL; 8027 8028 neg_ttlm.downlink[i] = params->dlink[i]; 8029 neg_ttlm.uplink[i] = params->ulink[i]; 8030 } 8031 8032 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 8033 NEG_TTLM_RES_ACCEPT) 8034 return -EINVAL; 8035 8036 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8037 sdata->u.mgd.dialog_token_alloc++; 8038 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 8039 sdata->u.mgd.dialog_token_alloc); 8040 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8041 &sdata->u.mgd.neg_ttlm_timeout_work); 8042 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 8043 &sdata->u.mgd.neg_ttlm_timeout_work, 8044 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 8045 return 0; 8046 } 8047 8048 static void 8049 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8050 enum ieee80211_neg_ttlm_res ttlm_res, 8051 u8 dialog_token, 8052 struct ieee80211_neg_ttlm *neg_ttlm) 8053 { 8054 struct ieee80211_local *local = sdata->local; 8055 struct ieee80211_mgmt *mgmt; 8056 struct sk_buff *skb; 8057 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_res); 8058 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8059 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8060 u16 status_code; 8061 8062 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8063 if (!skb) 8064 return; 8065 8066 skb_reserve(skb, local->tx_headroom); 8067 mgmt = skb_put_zero(skb, hdr_len); 8068 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8069 IEEE80211_STYPE_ACTION); 8070 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8071 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8072 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8073 8074 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8075 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 8076 mgmt->u.action.ttlm_res.dialog_token = dialog_token; 8077 switch (ttlm_res) { 8078 default: 8079 WARN_ON(1); 8080 fallthrough; 8081 case NEG_TTLM_RES_REJECT: 8082 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 8083 break; 8084 case NEG_TTLM_RES_ACCEPT: 8085 status_code = WLAN_STATUS_SUCCESS; 8086 break; 8087 case NEG_TTLM_RES_SUGGEST_PREFERRED: 8088 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 8089 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8090 break; 8091 } 8092 8093 mgmt->u.action.ttlm_res.status_code = cpu_to_le16(status_code); 8094 ieee80211_tx_skb(sdata, skb); 8095 } 8096 8097 static int 8098 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8099 const struct ieee80211_ttlm_elem *ttlm, 8100 struct ieee80211_neg_ttlm *neg_ttlm, 8101 u8 *direction) 8102 { 8103 u8 control, link_map_presence, map_size, tid; 8104 u8 *pos; 8105 8106 /* The element size was already validated in 8107 * ieee80211_tid_to_link_map_size_ok() 8108 */ 8109 pos = (void *)ttlm->optional; 8110 8111 control = ttlm->control; 8112 8113 /* mapping switch time and expected duration fields are not expected 8114 * in case of negotiated TTLM 8115 */ 8116 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 8117 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 8118 mlme_dbg(sdata, 8119 "Invalid TTLM element in negotiated TTLM request\n"); 8120 return -EINVAL; 8121 } 8122 8123 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 8124 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8125 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 8126 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 8127 } 8128 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 8129 return 0; 8130 } 8131 8132 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 8133 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 8134 *direction != IEEE80211_TTLM_DIRECTION_UP && 8135 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 8136 return -EINVAL; 8137 8138 link_map_presence = *pos; 8139 pos++; 8140 8141 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 8142 map_size = 1; 8143 else 8144 map_size = 2; 8145 8146 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8147 u16 map; 8148 8149 if (link_map_presence & BIT(tid)) { 8150 map = ieee80211_get_ttlm(map_size, pos); 8151 if (!map) { 8152 mlme_dbg(sdata, 8153 "No active links for TID %d", tid); 8154 return -EINVAL; 8155 } 8156 } else { 8157 map = 0; 8158 } 8159 8160 switch (*direction) { 8161 case IEEE80211_TTLM_DIRECTION_BOTH: 8162 neg_ttlm->downlink[tid] = map; 8163 neg_ttlm->uplink[tid] = map; 8164 break; 8165 case IEEE80211_TTLM_DIRECTION_DOWN: 8166 neg_ttlm->downlink[tid] = map; 8167 break; 8168 case IEEE80211_TTLM_DIRECTION_UP: 8169 neg_ttlm->uplink[tid] = map; 8170 break; 8171 default: 8172 return -EINVAL; 8173 } 8174 pos += map_size; 8175 } 8176 return 0; 8177 } 8178 8179 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8180 struct ieee80211_mgmt *mgmt, size_t len) 8181 { 8182 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 8183 size_t ies_len; 8184 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 8185 struct ieee802_11_elems *elems = NULL; 8186 struct ieee80211_neg_ttlm neg_ttlm = {}; 8187 8188 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 8189 8190 if (!ieee80211_vif_is_mld(&sdata->vif)) 8191 return; 8192 8193 dialog_token = mgmt->u.action.ttlm_req.dialog_token; 8194 ies_len = len - IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8195 elems = ieee802_11_parse_elems(mgmt->u.action.ttlm_req.variable, 8196 ies_len, 8197 IEEE80211_FTYPE_MGMT | 8198 IEEE80211_STYPE_ACTION, 8199 NULL); 8200 if (!elems) { 8201 ttlm_res = NEG_TTLM_RES_REJECT; 8202 goto out; 8203 } 8204 8205 for (i = 0; i < elems->ttlm_num; i++) { 8206 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8207 &neg_ttlm, &direction[i]) || 8208 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8209 elems->ttlm_num != 1)) { 8210 ttlm_res = NEG_TTLM_RES_REJECT; 8211 goto out; 8212 } 8213 } 8214 8215 if (!elems->ttlm_num || 8216 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8217 ttlm_res = NEG_TTLM_RES_REJECT; 8218 goto out; 8219 } 8220 8221 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8222 if ((neg_ttlm.downlink[i] && 8223 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8224 (neg_ttlm.uplink[i] && 8225 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8226 ttlm_res = NEG_TTLM_RES_REJECT; 8227 goto out; 8228 } 8229 } 8230 8231 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8232 8233 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8234 goto out; 8235 8236 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8237 out: 8238 kfree(elems); 8239 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8240 } 8241 8242 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8243 struct ieee80211_mgmt *mgmt, size_t len) 8244 { 8245 if (!ieee80211_vif_is_mld(&sdata->vif) || 8246 mgmt->u.action.ttlm_res.dialog_token != sdata->u.mgd.dialog_token_alloc) 8247 return; 8248 8249 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8250 &sdata->u.mgd.neg_ttlm_timeout_work); 8251 8252 /* MLD station sends a TID to link mapping request, mainly to handle 8253 * BTM (BSS transition management) request, in which case it needs to 8254 * restrict the active links set. 8255 * In this case it's not expected that the MLD AP will reject the 8256 * negotiated TTLM request. 8257 * This can be better implemented in the future, to handle request 8258 * rejections. 8259 */ 8260 if (le16_to_cpu(mgmt->u.action.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8261 __ieee80211_disconnect(sdata); 8262 } 8263 8264 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8265 { 8266 u16 new_dormant_links; 8267 8268 if (!sdata->vif.neg_ttlm.valid) 8269 return; 8270 8271 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8272 new_dormant_links = 8273 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8274 sdata->vif.suspended_links = 0; 8275 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8276 new_dormant_links); 8277 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8278 BSS_CHANGED_MLD_VALID_LINKS); 8279 } 8280 8281 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8282 struct wiphy_work *work) 8283 { 8284 struct ieee80211_sub_if_data *sdata = 8285 container_of(work, struct ieee80211_sub_if_data, 8286 u.mgd.teardown_ttlm_work); 8287 8288 ieee80211_process_ttlm_teardown(sdata); 8289 } 8290 8291 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8292 { 8293 int frame_len = IEEE80211_MIN_ACTION_SIZE(ttlm_tear_down); 8294 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8295 struct ieee80211_local *local = sdata->local; 8296 struct ieee80211_mgmt *mgmt; 8297 struct sk_buff *skb; 8298 struct ieee80211_tx_info *info; 8299 8300 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8301 if (!skb) 8302 return; 8303 8304 skb_reserve(skb, local->hw.extra_tx_headroom); 8305 mgmt = skb_put_zero(skb, frame_len); 8306 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8307 IEEE80211_STYPE_ACTION); 8308 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8309 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8310 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8311 8312 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8313 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8314 8315 info = IEEE80211_SKB_CB(skb); 8316 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8317 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8318 ieee80211_tx_skb(sdata, skb); 8319 } 8320 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8321 8322 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8323 struct sk_buff *skb) 8324 { 8325 struct ieee80211_link_data *link = &sdata->deflink; 8326 struct ieee80211_rx_status *rx_status; 8327 struct ieee80211_hdr *hdr; 8328 u16 fc; 8329 8330 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8331 8332 rx_status = (struct ieee80211_rx_status *) skb->cb; 8333 hdr = (struct ieee80211_hdr *) skb->data; 8334 fc = le16_to_cpu(hdr->frame_control); 8335 8336 switch (fc & IEEE80211_FCTL_STYPE) { 8337 case IEEE80211_STYPE_S1G_BEACON: 8338 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8339 break; 8340 } 8341 } 8342 8343 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8344 struct sk_buff *skb) 8345 { 8346 struct ieee80211_link_data *link = &sdata->deflink; 8347 struct ieee80211_rx_status *rx_status; 8348 struct ieee802_11_elems *elems; 8349 struct ieee80211_mgmt *mgmt; 8350 u16 fc; 8351 int ies_len; 8352 8353 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8354 8355 rx_status = (struct ieee80211_rx_status *) skb->cb; 8356 mgmt = (struct ieee80211_mgmt *) skb->data; 8357 fc = le16_to_cpu(mgmt->frame_control); 8358 8359 if (rx_status->link_valid) { 8360 link = sdata_dereference(sdata->link[rx_status->link_id], 8361 sdata); 8362 if (!link) 8363 return; 8364 } 8365 8366 switch (fc & IEEE80211_FCTL_STYPE) { 8367 case IEEE80211_STYPE_BEACON: 8368 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8369 skb->len, rx_status); 8370 break; 8371 case IEEE80211_STYPE_PROBE_RESP: 8372 ieee80211_rx_mgmt_probe_resp(link, skb); 8373 break; 8374 case IEEE80211_STYPE_AUTH: 8375 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8376 break; 8377 case IEEE80211_STYPE_DEAUTH: 8378 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8379 break; 8380 case IEEE80211_STYPE_DISASSOC: 8381 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8382 break; 8383 case IEEE80211_STYPE_ASSOC_RESP: 8384 case IEEE80211_STYPE_REASSOC_RESP: 8385 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8386 break; 8387 case IEEE80211_STYPE_ACTION: 8388 if (!sdata->u.mgd.associated || 8389 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8390 break; 8391 8392 switch (mgmt->u.action.category) { 8393 case WLAN_CATEGORY_SPECTRUM_MGMT: 8394 ies_len = skb->len - 8395 offsetof(struct ieee80211_mgmt, 8396 u.action.chan_switch.variable); 8397 8398 if (ies_len < 0) 8399 break; 8400 8401 /* CSA IE cannot be overridden, no need for BSSID */ 8402 elems = ieee802_11_parse_elems(mgmt->u.action.chan_switch.variable, 8403 ies_len, 8404 IEEE80211_FTYPE_MGMT | 8405 IEEE80211_STYPE_ACTION, 8406 NULL); 8407 8408 if (elems && !elems->parse_error) { 8409 enum ieee80211_csa_source src = 8410 IEEE80211_CSA_SOURCE_PROT_ACTION; 8411 8412 ieee80211_sta_process_chanswitch(link, 8413 rx_status->mactime, 8414 rx_status->device_timestamp, 8415 elems, elems, 8416 src); 8417 } 8418 kfree(elems); 8419 break; 8420 case WLAN_CATEGORY_PUBLIC: 8421 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8422 ies_len = skb->len - 8423 offsetof(struct ieee80211_mgmt, 8424 u.action.ext_chan_switch.variable); 8425 8426 if (ies_len < 0) 8427 break; 8428 8429 /* 8430 * extended CSA IE can't be overridden, no need for 8431 * BSSID 8432 */ 8433 elems = ieee802_11_parse_elems(mgmt->u.action.ext_chan_switch.variable, 8434 ies_len, 8435 IEEE80211_FTYPE_MGMT | 8436 IEEE80211_STYPE_ACTION, 8437 NULL); 8438 8439 if (elems && !elems->parse_error) { 8440 enum ieee80211_csa_source src; 8441 8442 if (mgmt->u.action.category == 8443 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8444 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8445 else 8446 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8447 8448 /* for the handling code pretend it was an IE */ 8449 elems->ext_chansw_ie = 8450 &mgmt->u.action.ext_chan_switch.data; 8451 8452 ieee80211_sta_process_chanswitch(link, 8453 rx_status->mactime, 8454 rx_status->device_timestamp, 8455 elems, elems, 8456 src); 8457 } 8458 8459 kfree(elems); 8460 break; 8461 } 8462 break; 8463 } 8464 } 8465 8466 static void ieee80211_sta_timer(struct timer_list *t) 8467 { 8468 struct ieee80211_sub_if_data *sdata = 8469 timer_container_of(sdata, t, u.mgd.timer); 8470 8471 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8472 } 8473 8474 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8475 u8 reason, bool tx) 8476 { 8477 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8478 8479 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8480 tx, frame_buf); 8481 8482 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8483 reason, false); 8484 } 8485 8486 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8487 { 8488 struct ieee80211_local *local = sdata->local; 8489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8490 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8491 u32 tx_flags = 0; 8492 u16 trans = 1; 8493 u16 status = 0; 8494 struct ieee80211_prep_tx_info info = { 8495 .subtype = IEEE80211_STYPE_AUTH, 8496 }; 8497 8498 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8499 8500 if (WARN_ON_ONCE(!auth_data)) 8501 return -EINVAL; 8502 8503 if (auth_data->algorithm == WLAN_AUTH_EPPKE && 8504 ieee80211_vif_is_mld(&sdata->vif) && 8505 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 8506 auth_data->data, auth_data->data_len)) 8507 return -EINVAL; 8508 8509 auth_data->tries++; 8510 8511 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8512 sdata_info(sdata, "authentication with %pM timed out\n", 8513 auth_data->ap_addr); 8514 8515 /* 8516 * Most likely AP is not in the range so remove the 8517 * bss struct for that AP. 8518 */ 8519 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8520 8521 return -ETIMEDOUT; 8522 } 8523 8524 if (auth_data->algorithm == WLAN_AUTH_SAE || 8525 auth_data->algorithm == WLAN_AUTH_EPPKE) 8526 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8527 8528 info.link_id = auth_data->link_id; 8529 drv_mgd_prepare_tx(local, sdata, &info); 8530 8531 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8532 auth_data->ap_addr, auth_data->tries, 8533 IEEE80211_AUTH_MAX_TRIES); 8534 8535 auth_data->expected_transaction = 2; 8536 8537 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8538 trans = auth_data->trans; 8539 status = auth_data->status; 8540 auth_data->expected_transaction = trans; 8541 } else if (auth_data->algorithm == WLAN_AUTH_EPPKE) { 8542 trans = auth_data->trans; 8543 status = auth_data->status; 8544 } else if (auth_data->algorithm == WLAN_AUTH_IEEE8021X) { 8545 trans = auth_data->trans; 8546 status = auth_data->status; 8547 auth_data->expected_transaction = trans + 1; 8548 } 8549 8550 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8551 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8552 IEEE80211_TX_INTFL_MLME_CONN_TX; 8553 8554 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8555 auth_data->data, auth_data->data_len, 8556 auth_data->ap_addr, auth_data->ap_addr, 8557 NULL, 0, 0, tx_flags); 8558 8559 if (tx_flags == 0) { 8560 if (auth_data->algorithm == WLAN_AUTH_SAE) 8561 auth_data->timeout = jiffies + 8562 IEEE80211_AUTH_TIMEOUT_SAE; 8563 else 8564 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8565 } else { 8566 auth_data->timeout = 8567 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8568 } 8569 8570 auth_data->timeout_started = true; 8571 run_again(sdata, auth_data->timeout); 8572 8573 return 0; 8574 } 8575 8576 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8577 { 8578 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8579 struct ieee80211_local *local = sdata->local; 8580 int ret; 8581 8582 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8583 8584 assoc_data->tries++; 8585 assoc_data->comeback = false; 8586 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8587 sdata_info(sdata, "association with %pM timed out\n", 8588 assoc_data->ap_addr); 8589 8590 /* 8591 * Most likely AP is not in the range so remove the 8592 * bss struct for that AP. 8593 */ 8594 cfg80211_unlink_bss(local->hw.wiphy, 8595 assoc_data->link[assoc_data->assoc_link_id].bss); 8596 8597 return -ETIMEDOUT; 8598 } 8599 8600 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8601 assoc_data->ap_addr, assoc_data->tries, 8602 IEEE80211_ASSOC_MAX_TRIES); 8603 ret = ieee80211_send_assoc(sdata); 8604 if (ret) 8605 return ret; 8606 8607 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8608 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8609 assoc_data->timeout_started = true; 8610 run_again(sdata, assoc_data->timeout); 8611 } else { 8612 assoc_data->timeout = 8613 round_jiffies_up(jiffies + 8614 IEEE80211_ASSOC_TIMEOUT_LONG); 8615 assoc_data->timeout_started = true; 8616 run_again(sdata, assoc_data->timeout); 8617 } 8618 8619 return 0; 8620 } 8621 8622 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8623 __le16 fc, bool acked) 8624 { 8625 struct ieee80211_local *local = sdata->local; 8626 8627 sdata->u.mgd.status_fc = fc; 8628 sdata->u.mgd.status_acked = acked; 8629 sdata->u.mgd.status_received = true; 8630 8631 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8632 } 8633 8634 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8635 { 8636 struct ieee80211_local *local = sdata->local; 8637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8638 8639 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8640 8641 if (ifmgd->status_received) { 8642 __le16 fc = ifmgd->status_fc; 8643 bool status_acked = ifmgd->status_acked; 8644 8645 ifmgd->status_received = false; 8646 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8647 if (status_acked) { 8648 if (ifmgd->auth_data->algorithm == 8649 WLAN_AUTH_SAE) 8650 ifmgd->auth_data->timeout = 8651 jiffies + 8652 IEEE80211_AUTH_TIMEOUT_SAE; 8653 else 8654 ifmgd->auth_data->timeout = 8655 jiffies + 8656 IEEE80211_AUTH_TIMEOUT_SHORT; 8657 run_again(sdata, ifmgd->auth_data->timeout); 8658 } else { 8659 ifmgd->auth_data->timeout = jiffies - 1; 8660 } 8661 ifmgd->auth_data->timeout_started = true; 8662 } else if (ifmgd->assoc_data && 8663 !ifmgd->assoc_data->comeback && 8664 (ieee80211_is_assoc_req(fc) || 8665 ieee80211_is_reassoc_req(fc))) { 8666 /* 8667 * Update association timeout based on the TX status 8668 * for the (Re)Association Request frame. Skip this if 8669 * we have already processed a (Re)Association Response 8670 * frame that indicated need for association comeback 8671 * at a specific time in the future. This could happen 8672 * if the TX status information is delayed enough for 8673 * the response to be received and processed first. 8674 */ 8675 if (status_acked) { 8676 ifmgd->assoc_data->timeout = 8677 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8678 run_again(sdata, ifmgd->assoc_data->timeout); 8679 } else { 8680 ifmgd->assoc_data->timeout = jiffies - 1; 8681 } 8682 ifmgd->assoc_data->timeout_started = true; 8683 } 8684 } 8685 8686 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8687 time_after(jiffies, ifmgd->auth_data->timeout)) { 8688 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8689 /* 8690 * ok ... we waited for assoc or continuation but 8691 * userspace didn't do it, so kill the auth data 8692 */ 8693 ieee80211_destroy_auth_data(sdata, false); 8694 } else if (ieee80211_auth(sdata)) { 8695 u8 ap_addr[ETH_ALEN]; 8696 struct ieee80211_event event = { 8697 .type = MLME_EVENT, 8698 .u.mlme.data = AUTH_EVENT, 8699 .u.mlme.status = MLME_TIMEOUT, 8700 }; 8701 8702 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8703 8704 ieee80211_destroy_auth_data(sdata, false); 8705 8706 cfg80211_auth_timeout(sdata->dev, ap_addr); 8707 drv_event_callback(sdata->local, sdata, &event); 8708 } 8709 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8710 run_again(sdata, ifmgd->auth_data->timeout); 8711 8712 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8713 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8714 if ((ifmgd->assoc_data->need_beacon && 8715 !sdata->deflink.u.mgd.have_beacon) || 8716 ieee80211_do_assoc(sdata)) { 8717 struct ieee80211_event event = { 8718 .type = MLME_EVENT, 8719 .u.mlme.data = ASSOC_EVENT, 8720 .u.mlme.status = MLME_TIMEOUT, 8721 }; 8722 8723 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8724 drv_event_callback(sdata->local, sdata, &event); 8725 } 8726 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8727 run_again(sdata, ifmgd->assoc_data->timeout); 8728 8729 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8730 ifmgd->associated) { 8731 u8 *bssid = sdata->deflink.u.mgd.bssid; 8732 int max_tries; 8733 8734 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8735 max_tries = max_nullfunc_tries; 8736 else 8737 max_tries = max_probe_tries; 8738 8739 /* ACK received for nullfunc probing frame */ 8740 if (!ifmgd->probe_send_count) 8741 ieee80211_reset_ap_probe(sdata); 8742 else if (ifmgd->nullfunc_failed) { 8743 if (ifmgd->probe_send_count < max_tries) { 8744 mlme_dbg(sdata, 8745 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8746 bssid, ifmgd->probe_send_count, 8747 max_tries); 8748 ieee80211_mgd_probe_ap_send(sdata); 8749 } else { 8750 mlme_dbg(sdata, 8751 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8752 bssid); 8753 ieee80211_sta_connection_lost(sdata, 8754 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8755 false); 8756 } 8757 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8758 run_again(sdata, ifmgd->probe_timeout); 8759 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8760 mlme_dbg(sdata, 8761 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8762 bssid, probe_wait_ms); 8763 ieee80211_sta_connection_lost(sdata, 8764 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8765 } else if (ifmgd->probe_send_count < max_tries) { 8766 mlme_dbg(sdata, 8767 "No probe response from AP %pM after %dms, try %d/%i\n", 8768 bssid, probe_wait_ms, 8769 ifmgd->probe_send_count, max_tries); 8770 ieee80211_mgd_probe_ap_send(sdata); 8771 } else { 8772 /* 8773 * We actually lost the connection ... or did we? 8774 * Let's make sure! 8775 */ 8776 mlme_dbg(sdata, 8777 "No probe response from AP %pM after %dms, disconnecting.\n", 8778 bssid, probe_wait_ms); 8779 8780 ieee80211_sta_connection_lost(sdata, 8781 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8782 } 8783 } 8784 } 8785 8786 static bool 8787 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8788 { 8789 /* 8790 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8791 * the links. 8792 */ 8793 struct ieee80211_link_data *link; 8794 8795 guard(rcu)(); 8796 8797 for_each_link_data_rcu(sdata, link) { 8798 if (!(link->conf->csa_active && 8799 !link->u.mgd.csa.waiting_bcn)) 8800 return false; 8801 } 8802 8803 return true; 8804 } 8805 8806 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8807 { 8808 struct ieee80211_sub_if_data *sdata = 8809 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8810 8811 if (ieee80211_is_csa_in_progress(sdata)) 8812 return; 8813 8814 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8815 return; 8816 8817 sdata->u.mgd.connection_loss = false; 8818 wiphy_work_queue(sdata->local->hw.wiphy, 8819 &sdata->u.mgd.beacon_connection_loss_work); 8820 } 8821 8822 static unsigned long 8823 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8824 { 8825 unsigned long latest_timeout = jiffies; 8826 unsigned int link_id; 8827 struct sta_info *sta; 8828 8829 guard(rcu)(); 8830 8831 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8832 if (!sta) 8833 return 0; 8834 8835 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8836 link_id++) { 8837 struct link_sta_info *link_sta; 8838 unsigned long timeout; 8839 8840 link_sta = rcu_dereference(sta->link[link_id]); 8841 if (!link_sta) 8842 continue; 8843 8844 timeout = link_sta->status_stats.last_ack; 8845 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8846 timeout = link_sta->rx_stats.last_rx; 8847 8848 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8849 8850 /* 8851 * latest_timeout holds the timeout of the link 8852 * that will expire last among all links in an 8853 * non-AP MLD STA. This ensures that the connection 8854 * monitor timer is only reset if at least one link 8855 * is still active, and it is scheduled to fire at 8856 * the latest possible timeout. 8857 */ 8858 if (time_after(timeout, latest_timeout)) 8859 latest_timeout = timeout; 8860 } 8861 8862 return latest_timeout; 8863 } 8864 8865 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8866 { 8867 struct ieee80211_sub_if_data *sdata = 8868 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8870 struct ieee80211_local *local = sdata->local; 8871 unsigned long latest_timeout; 8872 8873 if (ieee80211_is_csa_in_progress(sdata)) 8874 return; 8875 8876 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8877 8878 /* 8879 * If latest timeout is after now, then update timer to fire at 8880 * the later date, but do not actually probe at this time. 8881 */ 8882 if (time_is_after_jiffies(latest_timeout)) { 8883 mod_timer(&ifmgd->conn_mon_timer, 8884 round_jiffies_up(latest_timeout)); 8885 return; 8886 } 8887 8888 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8889 } 8890 8891 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8892 struct wiphy_work *work) 8893 { 8894 struct ieee80211_sub_if_data *sdata = 8895 container_of(work, struct ieee80211_sub_if_data, 8896 u.mgd.monitor_work); 8897 8898 ieee80211_mgd_probe_ap(sdata, false); 8899 } 8900 8901 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8902 { 8903 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8904 __ieee80211_stop_poll(sdata); 8905 8906 /* let's probe the connection once */ 8907 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8908 wiphy_work_queue(sdata->local->hw.wiphy, 8909 &sdata->u.mgd.monitor_work); 8910 } 8911 } 8912 8913 #ifdef CONFIG_PM 8914 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8915 { 8916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8917 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8918 8919 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8920 8921 if (ifmgd->auth_data || ifmgd->assoc_data) { 8922 const u8 *ap_addr = ifmgd->auth_data ? 8923 ifmgd->auth_data->ap_addr : 8924 ifmgd->assoc_data->ap_addr; 8925 8926 /* 8927 * If we are trying to authenticate / associate while suspending, 8928 * cfg80211 won't know and won't actually abort those attempts, 8929 * thus we need to do that ourselves. 8930 */ 8931 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8932 IEEE80211_STYPE_DEAUTH, 8933 WLAN_REASON_DEAUTH_LEAVING, 8934 false, frame_buf); 8935 if (ifmgd->assoc_data) 8936 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8937 if (ifmgd->auth_data) 8938 ieee80211_destroy_auth_data(sdata, false); 8939 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8940 IEEE80211_DEAUTH_FRAME_LEN, 8941 false); 8942 } 8943 8944 /* This is a bit of a hack - we should find a better and more generic 8945 * solution to this. Normally when suspending, cfg80211 will in fact 8946 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8947 * auth (not so important) or assoc (this is the problem) process. 8948 * 8949 * As a consequence, it can happen that we are in the process of both 8950 * associating and suspending, and receive an association response 8951 * after cfg80211 has checked if it needs to disconnect, but before 8952 * we actually set the flag to drop incoming frames. This will then 8953 * cause the workqueue flush to process the association response in 8954 * the suspend, resulting in a successful association just before it 8955 * tries to remove the interface from the driver, which now though 8956 * has a channel context assigned ... this results in issues. 8957 * 8958 * To work around this (for now) simply deauth here again if we're 8959 * now connected. 8960 */ 8961 if (ifmgd->associated && !sdata->local->wowlan) { 8962 u8 bssid[ETH_ALEN]; 8963 struct cfg80211_deauth_request req = { 8964 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8965 .bssid = bssid, 8966 }; 8967 8968 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8969 ieee80211_mgd_deauth(sdata, &req); 8970 } 8971 } 8972 #endif 8973 8974 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8975 { 8976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8977 8978 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8979 8980 if (!ifmgd->associated) 8981 return; 8982 8983 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8984 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8985 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8986 ieee80211_sta_connection_lost(sdata, 8987 WLAN_REASON_UNSPECIFIED, 8988 true); 8989 return; 8990 } 8991 8992 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8993 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8994 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8995 ieee80211_sta_connection_lost(sdata, 8996 WLAN_REASON_UNSPECIFIED, 8997 true); 8998 return; 8999 } 9000 } 9001 9002 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 9003 struct wiphy_work *work) 9004 { 9005 struct ieee80211_link_data *link = 9006 container_of(work, struct ieee80211_link_data, 9007 u.mgd.request_smps_work); 9008 9009 __ieee80211_request_smps_mgd(link->sdata, link, 9010 link->u.mgd.driver_smps_mode); 9011 } 9012 9013 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 9014 struct wiphy_work *work) 9015 { 9016 struct ieee80211_sub_if_data *sdata = 9017 container_of(work, struct ieee80211_sub_if_data, 9018 u.mgd.reconf.wk.work); 9019 9020 if (!sdata->u.mgd.reconf.added_links && 9021 !sdata->u.mgd.reconf.removed_links) 9022 return; 9023 9024 sdata_info(sdata, 9025 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 9026 sdata->u.mgd.reconf.added_links, 9027 sdata->u.mgd.reconf.removed_links); 9028 9029 __ieee80211_disconnect(sdata); 9030 } 9031 9032 /* interface setup */ 9033 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 9034 { 9035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9036 9037 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 9038 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 9039 ieee80211_beacon_connection_loss_work); 9040 wiphy_work_init(&ifmgd->csa_connection_drop_work, 9041 ieee80211_csa_connection_drop_work); 9042 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 9043 ieee80211_tdls_peer_del_work); 9044 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 9045 ieee80211_ml_reconf_work); 9046 wiphy_delayed_work_init(&ifmgd->reconf.wk, 9047 ieee80211_ml_sta_reconf_timeout); 9048 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 9049 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 9050 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 9051 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 9052 ieee80211_sta_handle_tspec_ac_params_wk); 9053 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 9054 ieee80211_tid_to_link_map_work); 9055 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 9056 ieee80211_neg_ttlm_timeout_work); 9057 wiphy_work_init(&ifmgd->teardown_ttlm_work, 9058 ieee80211_teardown_ttlm_work); 9059 9060 ifmgd->flags = 0; 9061 ifmgd->powersave = sdata->wdev.ps; 9062 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 9063 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 9064 /* Setup TDLS data */ 9065 spin_lock_init(&ifmgd->teardown_lock); 9066 ifmgd->teardown_skb = NULL; 9067 ifmgd->orig_teardown_skb = NULL; 9068 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 9069 } 9070 9071 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 9072 struct wiphy_work *work) 9073 { 9074 struct ieee80211_link_data *link = 9075 container_of(work, struct ieee80211_link_data, 9076 u.mgd.recalc_smps); 9077 9078 ieee80211_recalc_smps(link->sdata, link); 9079 } 9080 9081 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 9082 { 9083 struct ieee80211_sub_if_data *sdata = link->sdata; 9084 struct ieee80211_local *local = sdata->local; 9085 unsigned int link_id = link->link_id; 9086 9087 link->u.mgd.p2p_noa_index = -1; 9088 link->conf->bssid = link->u.mgd.bssid; 9089 link->smps_mode = IEEE80211_SMPS_OFF; 9090 9091 wiphy_work_init(&link->u.mgd.request_smps_work, 9092 ieee80211_request_smps_mgd_work); 9093 wiphy_work_init(&link->u.mgd.recalc_smps, 9094 ieee80211_recalc_smps_work); 9095 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 9096 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 9097 else 9098 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 9099 9100 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 9101 ieee80211_csa_switch_work); 9102 9103 ieee80211_clear_tpe(&link->conf->tpe); 9104 9105 if (sdata->u.mgd.assoc_data) 9106 ether_addr_copy(link->conf->addr, 9107 sdata->u.mgd.assoc_data->link[link_id].addr); 9108 else if (sdata->u.mgd.reconf.add_links_data) 9109 ether_addr_copy(link->conf->addr, 9110 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 9111 else if (!is_valid_ether_addr(link->conf->addr)) 9112 eth_random_addr(link->conf->addr); 9113 } 9114 9115 /* scan finished notification */ 9116 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 9117 { 9118 struct ieee80211_sub_if_data *sdata; 9119 9120 /* Restart STA timers */ 9121 rcu_read_lock(); 9122 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 9123 if (ieee80211_sdata_running(sdata)) 9124 ieee80211_restart_sta_timer(sdata); 9125 } 9126 rcu_read_unlock(); 9127 } 9128 9129 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 9130 struct cfg80211_bss *cbss, s8 link_id, 9131 const u8 *ap_mld_addr, bool assoc, 9132 struct ieee80211_conn_settings *conn, 9133 bool override, 9134 unsigned long *userspace_selectors) 9135 { 9136 struct ieee80211_local *local = sdata->local; 9137 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9138 struct ieee80211_bss *bss = (void *)cbss->priv; 9139 struct sta_info *new_sta = NULL; 9140 struct ieee80211_link_data *link; 9141 bool have_sta = false; 9142 bool mlo; 9143 int err; 9144 u16 new_links; 9145 9146 if (link_id >= 0) { 9147 mlo = true; 9148 if (WARN_ON(!ap_mld_addr)) 9149 return -EINVAL; 9150 new_links = BIT(link_id); 9151 } else { 9152 if (WARN_ON(ap_mld_addr)) 9153 return -EINVAL; 9154 ap_mld_addr = cbss->bssid; 9155 new_links = 0; 9156 link_id = 0; 9157 mlo = false; 9158 } 9159 9160 if (assoc) { 9161 rcu_read_lock(); 9162 have_sta = sta_info_get(sdata, ap_mld_addr); 9163 rcu_read_unlock(); 9164 } 9165 9166 if (mlo && !have_sta && 9167 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 9168 return -EINVAL; 9169 9170 err = ieee80211_vif_set_links(sdata, new_links, 0); 9171 if (err) 9172 return err; 9173 9174 link = sdata_dereference(sdata->link[link_id], sdata); 9175 if (WARN_ON(!link)) { 9176 err = -ENOLINK; 9177 goto out_err; 9178 } 9179 9180 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 9181 err = -EINVAL; 9182 goto out_err; 9183 } 9184 9185 /* If a reconfig is happening, bail out */ 9186 if (local->in_reconfig) { 9187 err = -EBUSY; 9188 goto out_err; 9189 } 9190 9191 if (!have_sta) { 9192 if (mlo) 9193 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 9194 link_id, cbss->bssid, 9195 GFP_KERNEL); 9196 else 9197 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 9198 9199 if (!new_sta) { 9200 err = -ENOMEM; 9201 goto out_err; 9202 } 9203 9204 if (ifmgd->auth_data && 9205 (ifmgd->auth_data->algorithm == WLAN_AUTH_EPPKE || 9206 ifmgd->auth_data->algorithm == WLAN_AUTH_IEEE8021X)) 9207 new_sta->sta.epp_peer = true; 9208 9209 new_sta->sta.mlo = mlo; 9210 } 9211 9212 /* 9213 * Set up the information for the new channel before setting the 9214 * new channel. We can't - completely race-free - change the basic 9215 * rates bitmap and the channel (sband) that it refers to, but if 9216 * we set it up before we at least avoid calling into the driver's 9217 * bss_info_changed() method with invalid information (since we do 9218 * call that from changing the channel - only for IDLE and perhaps 9219 * some others, but ...). 9220 * 9221 * So to avoid that, just set up all the new information before the 9222 * channel, but tell the driver to apply it only afterwards, since 9223 * it might need the new channel for that. 9224 */ 9225 if (new_sta) { 9226 const struct cfg80211_bss_ies *ies; 9227 struct link_sta_info *link_sta; 9228 9229 rcu_read_lock(); 9230 link_sta = rcu_dereference(new_sta->link[link_id]); 9231 if (WARN_ON(!link_sta)) { 9232 rcu_read_unlock(); 9233 sta_info_free(local, new_sta); 9234 err = -EINVAL; 9235 goto out_err; 9236 } 9237 9238 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9239 link_sta, cbss); 9240 if (err) { 9241 rcu_read_unlock(); 9242 sta_info_free(local, new_sta); 9243 goto out_err; 9244 } 9245 9246 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9247 9248 /* set timing information */ 9249 link->conf->beacon_int = cbss->beacon_interval; 9250 ies = rcu_dereference(cbss->beacon_ies); 9251 if (ies) { 9252 link->conf->sync_tsf = ies->tsf; 9253 link->conf->sync_device_ts = 9254 bss->device_ts_beacon; 9255 9256 ieee80211_get_dtim(ies, 9257 &link->conf->sync_dtim_count, 9258 NULL); 9259 } else if (!ieee80211_hw_check(&sdata->local->hw, 9260 TIMING_BEACON_ONLY)) { 9261 ies = rcu_dereference(cbss->proberesp_ies); 9262 /* must be non-NULL since beacon IEs were NULL */ 9263 link->conf->sync_tsf = ies->tsf; 9264 link->conf->sync_device_ts = 9265 bss->device_ts_presp; 9266 link->conf->sync_dtim_count = 0; 9267 } else { 9268 link->conf->sync_tsf = 0; 9269 link->conf->sync_device_ts = 0; 9270 link->conf->sync_dtim_count = 0; 9271 } 9272 rcu_read_unlock(); 9273 } 9274 9275 if (new_sta || override) { 9276 /* 9277 * Only set this if we're also going to calculate the AP 9278 * settings etc., otherwise this was set before in a 9279 * previous call. Note override is set to %true in assoc 9280 * if the settings were changed. 9281 */ 9282 link->u.mgd.conn = *conn; 9283 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9284 mlo, &link->u.mgd.conn, 9285 userspace_selectors); 9286 if (err) { 9287 if (new_sta) 9288 sta_info_free(local, new_sta); 9289 goto out_err; 9290 } 9291 /* pass out for use in assoc */ 9292 *conn = link->u.mgd.conn; 9293 } 9294 9295 if (new_sta) { 9296 /* 9297 * tell driver about BSSID, basic rates and timing 9298 * this was set up above, before setting the channel 9299 */ 9300 ieee80211_link_info_change_notify(sdata, link, 9301 BSS_CHANGED_BSSID | 9302 BSS_CHANGED_BASIC_RATES | 9303 BSS_CHANGED_BEACON_INT); 9304 9305 if (assoc) 9306 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9307 9308 err = sta_info_insert(new_sta); 9309 new_sta = NULL; 9310 if (err) { 9311 sdata_info(sdata, 9312 "failed to insert STA entry for the AP (error %d)\n", 9313 err); 9314 goto out_release_chan; 9315 } 9316 } else 9317 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9318 9319 /* Cancel scan to ensure that nothing interferes with connection */ 9320 if (local->scanning) 9321 ieee80211_scan_cancel(local); 9322 9323 return 0; 9324 9325 out_release_chan: 9326 ieee80211_link_release_channel(link); 9327 out_err: 9328 ieee80211_vif_set_links(sdata, 0, 0); 9329 return err; 9330 } 9331 9332 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9333 const struct cfg80211_bss_ies *ies, 9334 u8 cur_channel, bool ignore_ecsa) 9335 { 9336 const struct element *csa_elem, *ecsa_elem; 9337 struct ieee80211_channel_sw_ie *csa = NULL; 9338 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9339 9340 if (!ies) 9341 return false; 9342 9343 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9344 ies->data, ies->len); 9345 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9346 csa = (void *)csa_elem->data; 9347 9348 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9349 ies->data, ies->len); 9350 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9351 ecsa = (void *)ecsa_elem->data; 9352 9353 if (csa && csa->count == 0) 9354 csa = NULL; 9355 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9356 csa = NULL; 9357 9358 if (ecsa && ecsa->count == 0) 9359 ecsa = NULL; 9360 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9361 ecsa = NULL; 9362 9363 if (ignore_ecsa && ecsa) { 9364 sdata_info(sdata, 9365 "Ignoring ECSA in probe response - was considered stuck!\n"); 9366 return csa; 9367 } 9368 9369 return csa || ecsa; 9370 } 9371 9372 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9373 struct cfg80211_bss *bss) 9374 { 9375 u8 cur_channel; 9376 bool ret; 9377 9378 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9379 9380 rcu_read_lock(); 9381 if (ieee80211_mgd_csa_present(sdata, 9382 rcu_dereference(bss->beacon_ies), 9383 cur_channel, false)) { 9384 ret = true; 9385 goto out; 9386 } 9387 9388 if (ieee80211_mgd_csa_present(sdata, 9389 rcu_dereference(bss->proberesp_ies), 9390 cur_channel, bss->proberesp_ecsa_stuck)) { 9391 ret = true; 9392 goto out; 9393 } 9394 9395 ret = false; 9396 out: 9397 rcu_read_unlock(); 9398 return ret; 9399 } 9400 9401 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9402 const u8 *supported_selectors, 9403 u8 supported_selectors_len) 9404 { 9405 if (supported_selectors) { 9406 for (int i = 0; i < supported_selectors_len; i++) { 9407 set_bit(supported_selectors[i], 9408 userspace_selectors); 9409 } 9410 } else { 9411 /* Assume SAE_H2E support for backward compatibility. */ 9412 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9413 userspace_selectors); 9414 } 9415 } 9416 9417 /* config hooks */ 9418 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9419 struct cfg80211_auth_request *req) 9420 { 9421 struct ieee80211_local *local = sdata->local; 9422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9423 struct ieee80211_mgd_auth_data *auth_data; 9424 struct ieee80211_conn_settings conn; 9425 struct ieee80211_link_data *link; 9426 struct ieee80211_supported_band *sband; 9427 struct ieee80211_bss *bss; 9428 u16 auth_alg; 9429 int err; 9430 bool cont_auth, wmm_used; 9431 9432 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9433 9434 /* prepare auth data structure */ 9435 9436 switch (req->auth_type) { 9437 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9438 auth_alg = WLAN_AUTH_OPEN; 9439 break; 9440 case NL80211_AUTHTYPE_SHARED_KEY: 9441 if (fips_enabled) 9442 return -EOPNOTSUPP; 9443 auth_alg = WLAN_AUTH_SHARED_KEY; 9444 break; 9445 case NL80211_AUTHTYPE_FT: 9446 auth_alg = WLAN_AUTH_FT; 9447 break; 9448 case NL80211_AUTHTYPE_NETWORK_EAP: 9449 auth_alg = WLAN_AUTH_LEAP; 9450 break; 9451 case NL80211_AUTHTYPE_SAE: 9452 auth_alg = WLAN_AUTH_SAE; 9453 break; 9454 case NL80211_AUTHTYPE_FILS_SK: 9455 auth_alg = WLAN_AUTH_FILS_SK; 9456 break; 9457 case NL80211_AUTHTYPE_FILS_SK_PFS: 9458 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9459 break; 9460 case NL80211_AUTHTYPE_FILS_PK: 9461 auth_alg = WLAN_AUTH_FILS_PK; 9462 break; 9463 case NL80211_AUTHTYPE_EPPKE: 9464 auth_alg = WLAN_AUTH_EPPKE; 9465 break; 9466 case NL80211_AUTHTYPE_IEEE8021X: 9467 auth_alg = WLAN_AUTH_IEEE8021X; 9468 break; 9469 default: 9470 return -EOPNOTSUPP; 9471 } 9472 9473 if (ifmgd->assoc_data) 9474 return -EBUSY; 9475 9476 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9477 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9478 return -EINVAL; 9479 } 9480 9481 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9482 req->ie_len, GFP_KERNEL); 9483 if (!auth_data) 9484 return -ENOMEM; 9485 9486 memcpy(auth_data->ap_addr, 9487 req->ap_mld_addr ?: req->bss->bssid, 9488 ETH_ALEN); 9489 auth_data->bss = req->bss; 9490 auth_data->link_id = req->link_id; 9491 9492 if (req->auth_data_len >= 4) { 9493 if (req->auth_type == NL80211_AUTHTYPE_SAE || 9494 req->auth_type == NL80211_AUTHTYPE_EPPKE || 9495 req->auth_type == NL80211_AUTHTYPE_IEEE8021X) { 9496 __le16 *pos = (__le16 *) req->auth_data; 9497 9498 auth_data->trans = le16_to_cpu(pos[0]); 9499 auth_data->status = le16_to_cpu(pos[1]); 9500 } 9501 9502 memcpy(auth_data->data, req->auth_data + 4, 9503 req->auth_data_len - 4); 9504 auth_data->data_len += req->auth_data_len - 4; 9505 } 9506 9507 /* Check if continuing authentication or trying to authenticate with the 9508 * same BSS that we were in the process of authenticating with and avoid 9509 * removal and re-addition of the STA entry in 9510 * ieee80211_prep_connection(). 9511 */ 9512 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9513 ifmgd->auth_data->link_id == req->link_id; 9514 9515 if (req->ie && req->ie_len) { 9516 memcpy(&auth_data->data[auth_data->data_len], 9517 req->ie, req->ie_len); 9518 auth_data->data_len += req->ie_len; 9519 } 9520 9521 if (req->key && req->key_len) { 9522 auth_data->key_len = req->key_len; 9523 auth_data->key_idx = req->key_idx; 9524 memcpy(auth_data->key, req->key, req->key_len); 9525 } 9526 9527 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9528 req->supported_selectors, 9529 req->supported_selectors_len); 9530 9531 auth_data->algorithm = auth_alg; 9532 9533 /* try to authenticate/probe */ 9534 9535 if (ifmgd->auth_data) { 9536 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9537 auth_data->peer_confirmed = 9538 ifmgd->auth_data->peer_confirmed; 9539 } 9540 ieee80211_destroy_auth_data(sdata, cont_auth); 9541 } 9542 9543 /* prep auth_data so we don't go into idle on disassoc */ 9544 ifmgd->auth_data = auth_data; 9545 9546 /* If this is continuation of an ongoing SAE authentication exchange 9547 * (i.e., request to send SAE Confirm) and the peer has already 9548 * confirmed, mark authentication completed since we are about to send 9549 * out SAE Confirm. 9550 */ 9551 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9552 auth_data->peer_confirmed && auth_data->trans == 2) 9553 ieee80211_mark_sta_auth(sdata); 9554 9555 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_EPPKE && 9556 auth_data->trans == 3) 9557 ieee80211_mark_sta_auth(sdata); 9558 9559 if (ifmgd->associated) { 9560 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9561 9562 sdata_info(sdata, 9563 "disconnect from AP %pM for new auth to %pM\n", 9564 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9565 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9566 WLAN_REASON_UNSPECIFIED, 9567 false, frame_buf); 9568 9569 ieee80211_report_disconnect(sdata, frame_buf, 9570 sizeof(frame_buf), true, 9571 WLAN_REASON_UNSPECIFIED, 9572 false); 9573 } 9574 9575 /* needed for transmitting the auth frame(s) properly */ 9576 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9577 9578 bss = (void *)req->bss->priv; 9579 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9580 9581 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9582 9583 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9584 &conn); 9585 9586 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9587 req->ap_mld_addr, cont_auth, 9588 &conn, false, 9589 auth_data->userspace_selectors); 9590 if (err) 9591 goto err_clear; 9592 9593 if (req->link_id >= 0) 9594 link = sdata_dereference(sdata->link[req->link_id], sdata); 9595 else 9596 link = &sdata->deflink; 9597 9598 if (WARN_ON(!link)) { 9599 err = -ENOLINK; 9600 goto err_clear; 9601 } 9602 9603 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9604 auth_data->ap_addr, link->conf->addr); 9605 9606 err = ieee80211_auth(sdata); 9607 if (err) { 9608 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9609 goto err_clear; 9610 } 9611 9612 /* hold our own reference */ 9613 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9614 return 0; 9615 9616 err_clear: 9617 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9618 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9619 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9620 BSS_CHANGED_BSSID); 9621 ieee80211_link_release_channel(&sdata->deflink); 9622 } 9623 ifmgd->auth_data = NULL; 9624 kfree(auth_data); 9625 return err; 9626 } 9627 9628 static void 9629 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9630 struct ieee80211_mgd_assoc_data *assoc_data, 9631 struct cfg80211_assoc_request *req, 9632 struct ieee80211_conn_settings *conn, 9633 unsigned int link_id) 9634 { 9635 struct ieee80211_local *local = sdata->local; 9636 const struct cfg80211_bss_ies *bss_ies; 9637 struct ieee80211_supported_band *sband; 9638 struct ieee80211_link_data *link; 9639 struct cfg80211_bss *cbss; 9640 struct ieee80211_bss *bss; 9641 9642 cbss = assoc_data->link[link_id].bss; 9643 if (WARN_ON(!cbss)) 9644 return; 9645 9646 bss = (void *)cbss->priv; 9647 9648 sband = local->hw.wiphy->bands[cbss->channel->band]; 9649 if (WARN_ON(!sband)) 9650 return; 9651 9652 link = sdata_dereference(sdata->link[link_id], sdata); 9653 if (WARN_ON(!link)) 9654 return; 9655 9656 /* for MLO connections assume advertising all rates is OK */ 9657 if (!req->ap_mld_addr) { 9658 assoc_data->supp_rates = bss->supp_rates; 9659 assoc_data->supp_rates_len = bss->supp_rates_len; 9660 } 9661 9662 /* copy and link elems for the STA profile */ 9663 if (req->links[link_id].elems_len) { 9664 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9665 req->links[link_id].elems_len); 9666 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9667 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9668 assoc_data->ie_pos += req->links[link_id].elems_len; 9669 } 9670 9671 link->u.mgd.beacon_crc_valid = false; 9672 link->u.mgd.dtim_period = 0; 9673 link->u.mgd.have_beacon = false; 9674 9675 /* override HT configuration only if the AP and we support it */ 9676 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9677 struct ieee80211_sta_ht_cap sta_ht_cap; 9678 9679 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9680 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9681 } 9682 9683 rcu_read_lock(); 9684 bss_ies = rcu_dereference(cbss->beacon_ies); 9685 if (bss_ies) { 9686 u8 dtim_count = 0; 9687 9688 ieee80211_get_dtim(bss_ies, &dtim_count, 9689 &link->u.mgd.dtim_period); 9690 9691 sdata->deflink.u.mgd.have_beacon = true; 9692 9693 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9694 link->conf->sync_tsf = bss_ies->tsf; 9695 link->conf->sync_device_ts = bss->device_ts_beacon; 9696 link->conf->sync_dtim_count = dtim_count; 9697 } 9698 } else { 9699 bss_ies = rcu_dereference(cbss->ies); 9700 } 9701 9702 if (bss_ies) { 9703 const struct element *elem; 9704 9705 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9706 bss_ies->data, bss_ies->len); 9707 if (elem && elem->datalen >= 3) 9708 link->conf->profile_periodicity = elem->data[2]; 9709 else 9710 link->conf->profile_periodicity = 0; 9711 9712 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9713 bss_ies->data, bss_ies->len); 9714 if (elem && elem->datalen >= 11 && 9715 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9716 link->conf->ema_ap = true; 9717 else 9718 link->conf->ema_ap = false; 9719 } 9720 rcu_read_unlock(); 9721 9722 if (bss->corrupt_data) { 9723 char *corrupt_type = "data"; 9724 9725 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9726 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9727 corrupt_type = "beacon and probe response"; 9728 else 9729 corrupt_type = "beacon"; 9730 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9731 corrupt_type = "probe response"; 9732 } 9733 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9734 cbss->bssid, corrupt_type); 9735 } 9736 9737 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9738 if (sdata->u.mgd.powersave) 9739 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9740 else 9741 link->smps_mode = IEEE80211_SMPS_OFF; 9742 } else { 9743 link->smps_mode = link->u.mgd.req_smps; 9744 } 9745 } 9746 9747 static int 9748 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9749 struct ieee80211_mgd_assoc_data *assoc_data, 9750 int link_id) 9751 { 9752 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9753 enum nl80211_band band = cbss->channel->band; 9754 struct ieee80211_supported_band *sband; 9755 const struct element *elem; 9756 int err; 9757 9758 /* neither HT nor VHT elements used on 6 GHz */ 9759 if (band == NL80211_BAND_6GHZ) 9760 return 0; 9761 9762 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9763 return 0; 9764 9765 rcu_read_lock(); 9766 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9767 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9768 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9769 cbss->bssid); 9770 err = -EINVAL; 9771 goto out_rcu; 9772 } 9773 assoc_data->link[link_id].ap_ht_param = 9774 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9775 rcu_read_unlock(); 9776 9777 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9778 return 0; 9779 9780 /* some drivers want to support VHT on 2.4 GHz even */ 9781 sband = sdata->local->hw.wiphy->bands[band]; 9782 if (!sband->vht_cap.vht_supported) 9783 return 0; 9784 9785 rcu_read_lock(); 9786 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9787 /* but even then accept it not being present on the AP */ 9788 if (!elem && band == NL80211_BAND_2GHZ) { 9789 err = 0; 9790 goto out_rcu; 9791 } 9792 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9793 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9794 cbss->bssid); 9795 err = -EINVAL; 9796 goto out_rcu; 9797 } 9798 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9799 sizeof(struct ieee80211_vht_cap)); 9800 rcu_read_unlock(); 9801 9802 return 0; 9803 out_rcu: 9804 rcu_read_unlock(); 9805 return err; 9806 } 9807 9808 static bool 9809 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9810 { 9811 const struct cfg80211_bss_ies *ies; 9812 struct cfg80211_bss *bss; 9813 const struct element *ml; 9814 9815 /* not an MLO connection if link_id < 0, so irrelevant */ 9816 if (req->link_id < 0) 9817 return false; 9818 9819 bss = req->links[req->link_id].bss; 9820 9821 guard(rcu)(); 9822 ies = rcu_dereference(bss->ies); 9823 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9824 ies->data, ies->len) { 9825 const struct ieee80211_multi_link_elem *mle; 9826 9827 if (!ieee80211_mle_type_ok(ml->data + 1, 9828 IEEE80211_ML_CONTROL_TYPE_BASIC, 9829 ml->datalen - 1)) 9830 continue; 9831 9832 mle = (void *)(ml->data + 1); 9833 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9834 return true; 9835 } 9836 9837 return false; 9838 9839 } 9840 9841 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9842 struct cfg80211_assoc_request *req) 9843 { 9844 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9845 struct ieee80211_local *local = sdata->local; 9846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9847 struct ieee80211_mgd_assoc_data *assoc_data; 9848 const struct element *ssid_elem; 9849 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9850 struct ieee80211_link_data *link; 9851 struct cfg80211_bss *cbss; 9852 bool override, uapsd_supported; 9853 bool match_auth; 9854 int i, err; 9855 size_t size = sizeof(*assoc_data) + req->ie_len; 9856 9857 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9858 size += req->links[i].elems_len; 9859 9860 /* FIXME: no support for 4-addr MLO yet */ 9861 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9862 return -EOPNOTSUPP; 9863 9864 assoc_data = kzalloc(size, GFP_KERNEL); 9865 if (!assoc_data) 9866 return -ENOMEM; 9867 9868 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9869 9870 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9871 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9872 err = -EINVAL; 9873 goto err_free; 9874 } 9875 9876 rcu_read_lock(); 9877 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9878 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9879 rcu_read_unlock(); 9880 err = -EINVAL; 9881 goto err_free; 9882 } 9883 9884 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9885 assoc_data->ssid_len = ssid_elem->datalen; 9886 rcu_read_unlock(); 9887 9888 if (req->ap_mld_addr) 9889 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9890 else 9891 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9892 9893 /* 9894 * Many APs have broken parsing of the extended MLD capa/ops field, 9895 * dropping (re-)association request frames or replying with association 9896 * response with a failure status if it's present. 9897 * Set our value from the userspace request only in strict mode or if 9898 * the AP also had that field present. 9899 */ 9900 if (ieee80211_hw_check(&local->hw, STRICT) || 9901 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9902 assoc_data->ext_mld_capa_ops = 9903 cpu_to_le16(req->ext_mld_capa_ops); 9904 9905 if (ifmgd->associated) { 9906 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9907 9908 sdata_info(sdata, 9909 "disconnect from AP %pM for new assoc to %pM\n", 9910 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9911 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9912 WLAN_REASON_UNSPECIFIED, 9913 false, frame_buf); 9914 9915 ieee80211_report_disconnect(sdata, frame_buf, 9916 sizeof(frame_buf), true, 9917 WLAN_REASON_UNSPECIFIED, 9918 false); 9919 } 9920 9921 memset(sdata->u.mgd.userspace_selectors, 0, 9922 sizeof(sdata->u.mgd.userspace_selectors)); 9923 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9924 req->supported_selectors, 9925 req->supported_selectors_len); 9926 9927 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9928 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9929 sizeof(ifmgd->ht_capa_mask)); 9930 9931 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9932 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9933 sizeof(ifmgd->vht_capa_mask)); 9934 9935 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9936 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9937 sizeof(ifmgd->s1g_capa_mask)); 9938 9939 /* keep some setup (AP STA, channel, ...) if matching */ 9940 match_auth = ifmgd->auth_data && 9941 ether_addr_equal(ifmgd->auth_data->ap_addr, 9942 assoc_data->ap_addr) && 9943 ifmgd->auth_data->link_id == req->link_id; 9944 9945 if (req->ap_mld_addr) { 9946 uapsd_supported = true; 9947 9948 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9949 ASSOC_REQ_DISABLE_VHT | 9950 ASSOC_REQ_DISABLE_HE | 9951 ASSOC_REQ_DISABLE_EHT)) { 9952 err = -EINVAL; 9953 goto err_free; 9954 } 9955 9956 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9957 struct ieee80211_supported_band *sband; 9958 struct cfg80211_bss *link_cbss = req->links[i].bss; 9959 struct ieee80211_bss *bss; 9960 9961 if (!link_cbss) 9962 continue; 9963 9964 bss = (void *)link_cbss->priv; 9965 9966 if (!bss->wmm_used) { 9967 err = -EINVAL; 9968 req->links[i].error = err; 9969 goto err_free; 9970 } 9971 9972 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9973 err = -EINVAL; 9974 req->links[i].error = err; 9975 goto err_free; 9976 } 9977 9978 link = sdata_dereference(sdata->link[i], sdata); 9979 if (link) 9980 ether_addr_copy(assoc_data->link[i].addr, 9981 link->conf->addr); 9982 else 9983 eth_random_addr(assoc_data->link[i].addr); 9984 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9985 9986 if (match_auth && i == assoc_link_id && link) 9987 assoc_data->link[i].conn = link->u.mgd.conn; 9988 else 9989 assoc_data->link[i].conn = 9990 ieee80211_conn_settings_unlimited; 9991 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9992 req, true, i, 9993 &assoc_data->link[i].conn); 9994 assoc_data->link[i].bss = link_cbss; 9995 9996 if (!bss->uapsd_supported) 9997 uapsd_supported = false; 9998 9999 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 10000 err = -EINVAL; 10001 req->links[i].error = err; 10002 goto err_free; 10003 } 10004 10005 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 10006 assoc_data, i); 10007 if (err) { 10008 err = -EINVAL; 10009 req->links[i].error = err; 10010 goto err_free; 10011 } 10012 } 10013 10014 assoc_data->wmm = true; 10015 } else { 10016 struct ieee80211_supported_band *sband; 10017 struct ieee80211_bss *bss = (void *)cbss->priv; 10018 10019 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 10020 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 10021 10022 assoc_data->wmm = bss->wmm_used && 10023 (local->hw.queues >= IEEE80211_NUM_ACS); 10024 10025 if (cbss->channel->band == NL80211_BAND_6GHZ && 10026 req->flags & (ASSOC_REQ_DISABLE_HT | 10027 ASSOC_REQ_DISABLE_VHT | 10028 ASSOC_REQ_DISABLE_HE)) { 10029 err = -EINVAL; 10030 goto err_free; 10031 } 10032 10033 sband = local->hw.wiphy->bands[cbss->channel->band]; 10034 10035 assoc_data->link[0].bss = cbss; 10036 10037 if (match_auth) 10038 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 10039 else 10040 assoc_data->link[0].conn = 10041 ieee80211_conn_settings_unlimited; 10042 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 10043 assoc_data->wmm, 0, 10044 &assoc_data->link[0].conn); 10045 10046 uapsd_supported = bss->uapsd_supported; 10047 10048 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 10049 if (err) 10050 goto err_free; 10051 } 10052 10053 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 10054 10055 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 10056 err = -EBUSY; 10057 goto err_free; 10058 } 10059 10060 if (ifmgd->assoc_data) { 10061 err = -EBUSY; 10062 goto err_free; 10063 } 10064 10065 /* Cleanup is delayed if auth_data matches */ 10066 if (ifmgd->auth_data && !match_auth) 10067 ieee80211_destroy_auth_data(sdata, false); 10068 10069 if (req->ie && req->ie_len) { 10070 memcpy(assoc_data->ie, req->ie, req->ie_len); 10071 assoc_data->ie_len = req->ie_len; 10072 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 10073 } else { 10074 assoc_data->ie_pos = assoc_data->ie; 10075 } 10076 10077 if (req->fils_kek) { 10078 /* should already be checked in cfg80211 - so warn */ 10079 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 10080 err = -EINVAL; 10081 goto err_free; 10082 } 10083 memcpy(assoc_data->fils_kek, req->fils_kek, 10084 req->fils_kek_len); 10085 assoc_data->fils_kek_len = req->fils_kek_len; 10086 } 10087 10088 if (req->fils_nonces) 10089 memcpy(assoc_data->fils_nonces, req->fils_nonces, 10090 2 * FILS_NONCE_LEN); 10091 10092 /* default timeout */ 10093 assoc_data->timeout = jiffies; 10094 assoc_data->timeout_started = true; 10095 10096 assoc_data->assoc_link_id = assoc_link_id; 10097 10098 if (req->ap_mld_addr) { 10099 /* if there was no authentication, set up the link */ 10100 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 10101 if (err) 10102 goto err_clear; 10103 } 10104 10105 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 10106 if (WARN_ON(!link)) { 10107 err = -EINVAL; 10108 goto err_clear; 10109 } 10110 10111 override = link->u.mgd.conn.mode != 10112 assoc_data->link[assoc_link_id].conn.mode || 10113 link->u.mgd.conn.bw_limit != 10114 assoc_data->link[assoc_link_id].conn.bw_limit; 10115 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 10116 10117 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 10118 assoc_link_id); 10119 10120 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 10121 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 10122 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 10123 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 10124 10125 if (assoc_data->wmm && uapsd_supported && 10126 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 10127 assoc_data->uapsd = true; 10128 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 10129 } else { 10130 assoc_data->uapsd = false; 10131 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 10132 } 10133 10134 if (req->prev_bssid) 10135 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 10136 10137 if (req->use_mfp) { 10138 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 10139 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 10140 } else { 10141 ifmgd->mfp = IEEE80211_MFP_DISABLED; 10142 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 10143 } 10144 10145 if (req->flags & ASSOC_REQ_USE_RRM) 10146 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 10147 else 10148 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 10149 10150 if (req->crypto.control_port) 10151 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 10152 else 10153 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 10154 10155 sdata->control_port_protocol = req->crypto.control_port_ethertype; 10156 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 10157 sdata->control_port_over_nl80211 = 10158 req->crypto.control_port_over_nl80211; 10159 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 10160 10161 /* kick off associate process */ 10162 ifmgd->assoc_data = assoc_data; 10163 10164 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 10165 if (!assoc_data->link[i].bss) 10166 continue; 10167 if (i == assoc_data->assoc_link_id) 10168 continue; 10169 /* only calculate the mode, hence link == NULL */ 10170 err = ieee80211_prep_channel(sdata, NULL, i, 10171 assoc_data->link[i].bss, true, 10172 &assoc_data->link[i].conn, 10173 sdata->u.mgd.userspace_selectors); 10174 if (err) { 10175 req->links[i].error = err; 10176 goto err_clear; 10177 } 10178 } 10179 10180 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 10181 vif_cfg->ssid_len = assoc_data->ssid_len; 10182 10183 /* needed for transmitting the assoc frames properly */ 10184 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 10185 10186 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 10187 req->ap_mld_addr, true, 10188 &assoc_data->link[assoc_link_id].conn, 10189 override, 10190 sdata->u.mgd.userspace_selectors); 10191 if (err) 10192 goto err_clear; 10193 10194 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 10195 const struct cfg80211_bss_ies *beacon_ies; 10196 10197 rcu_read_lock(); 10198 beacon_ies = rcu_dereference(req->bss->beacon_ies); 10199 if (!beacon_ies) { 10200 /* 10201 * Wait up to one beacon interval ... 10202 * should this be more if we miss one? 10203 */ 10204 sdata_info(sdata, "waiting for beacon from %pM\n", 10205 link->u.mgd.bssid); 10206 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 10207 assoc_data->timeout_started = true; 10208 assoc_data->need_beacon = true; 10209 } 10210 rcu_read_unlock(); 10211 } 10212 10213 run_again(sdata, assoc_data->timeout); 10214 10215 /* We are associating, clean up auth_data */ 10216 if (ifmgd->auth_data) 10217 ieee80211_destroy_auth_data(sdata, true); 10218 10219 return 0; 10220 err_clear: 10221 if (!ifmgd->auth_data) { 10222 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10223 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10224 BSS_CHANGED_BSSID); 10225 } 10226 ifmgd->assoc_data = NULL; 10227 err_free: 10228 kfree(assoc_data); 10229 return err; 10230 } 10231 10232 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10233 struct cfg80211_deauth_request *req) 10234 { 10235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10236 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10237 bool tx = !req->local_state_change; 10238 struct ieee80211_prep_tx_info info = { 10239 .subtype = IEEE80211_STYPE_DEAUTH, 10240 }; 10241 10242 if (ifmgd->auth_data && 10243 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10244 sdata_info(sdata, 10245 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10246 req->bssid, req->reason_code, 10247 ieee80211_get_reason_code_string(req->reason_code)); 10248 10249 info.link_id = ifmgd->auth_data->link_id; 10250 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10251 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10252 IEEE80211_STYPE_DEAUTH, 10253 req->reason_code, tx, 10254 frame_buf); 10255 ieee80211_destroy_auth_data(sdata, false); 10256 ieee80211_report_disconnect(sdata, frame_buf, 10257 sizeof(frame_buf), true, 10258 req->reason_code, false); 10259 drv_mgd_complete_tx(sdata->local, sdata, &info); 10260 return 0; 10261 } 10262 10263 if (ifmgd->assoc_data && 10264 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10265 sdata_info(sdata, 10266 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10267 req->bssid, req->reason_code, 10268 ieee80211_get_reason_code_string(req->reason_code)); 10269 10270 info.link_id = ifmgd->assoc_data->assoc_link_id; 10271 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10272 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10273 IEEE80211_STYPE_DEAUTH, 10274 req->reason_code, tx, 10275 frame_buf); 10276 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10277 ieee80211_report_disconnect(sdata, frame_buf, 10278 sizeof(frame_buf), true, 10279 req->reason_code, false); 10280 drv_mgd_complete_tx(sdata->local, sdata, &info); 10281 return 0; 10282 } 10283 10284 if (ifmgd->associated && 10285 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10286 sdata_info(sdata, 10287 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10288 req->bssid, req->reason_code, 10289 ieee80211_get_reason_code_string(req->reason_code)); 10290 10291 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10292 req->reason_code, tx, frame_buf); 10293 ieee80211_report_disconnect(sdata, frame_buf, 10294 sizeof(frame_buf), true, 10295 req->reason_code, false); 10296 return 0; 10297 } 10298 10299 return -ENOTCONN; 10300 } 10301 10302 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10303 struct cfg80211_disassoc_request *req) 10304 { 10305 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10306 10307 if (!sdata->u.mgd.associated || 10308 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10309 return -ENOTCONN; 10310 10311 sdata_info(sdata, 10312 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10313 req->ap_addr, req->reason_code, 10314 ieee80211_get_reason_code_string(req->reason_code)); 10315 10316 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10317 req->reason_code, !req->local_state_change, 10318 frame_buf); 10319 10320 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10321 req->reason_code, false); 10322 10323 return 0; 10324 } 10325 10326 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10327 { 10328 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10329 &link->u.mgd.request_smps_work); 10330 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10331 &link->u.mgd.recalc_smps); 10332 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10333 &link->u.mgd.csa.switch_work); 10334 } 10335 10336 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10337 { 10338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10339 10340 /* 10341 * Make sure some work items will not run after this, 10342 * they will not do anything but might not have been 10343 * cancelled when disconnecting. 10344 */ 10345 wiphy_work_cancel(sdata->local->hw.wiphy, 10346 &ifmgd->monitor_work); 10347 wiphy_work_cancel(sdata->local->hw.wiphy, 10348 &ifmgd->beacon_connection_loss_work); 10349 wiphy_work_cancel(sdata->local->hw.wiphy, 10350 &ifmgd->csa_connection_drop_work); 10351 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10352 &ifmgd->tdls_peer_del_work); 10353 10354 if (ifmgd->assoc_data) 10355 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10356 if (ifmgd->auth_data) 10357 ieee80211_destroy_auth_data(sdata, false); 10358 spin_lock_bh(&ifmgd->teardown_lock); 10359 if (ifmgd->teardown_skb) { 10360 kfree_skb(ifmgd->teardown_skb); 10361 ifmgd->teardown_skb = NULL; 10362 ifmgd->orig_teardown_skb = NULL; 10363 } 10364 kfree(ifmgd->assoc_req_ies); 10365 ifmgd->assoc_req_ies = NULL; 10366 ifmgd->assoc_req_ies_len = 0; 10367 spin_unlock_bh(&ifmgd->teardown_lock); 10368 timer_delete_sync(&ifmgd->timer); 10369 } 10370 10371 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10372 enum nl80211_cqm_rssi_threshold_event rssi_event, 10373 s32 rssi_level, 10374 gfp_t gfp) 10375 { 10376 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10377 10378 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10379 10380 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10381 } 10382 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10383 10384 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10385 { 10386 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10387 10388 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10389 10390 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10391 } 10392 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10393 10394 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10395 int rssi_min_thold, 10396 int rssi_max_thold) 10397 { 10398 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10399 10400 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10401 return; 10402 10403 /* 10404 * Scale up threshold values before storing it, as the RSSI averaging 10405 * algorithm uses a scaled up value as well. Change this scaling 10406 * factor if the RSSI averaging algorithm changes. 10407 */ 10408 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10409 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10410 } 10411 10412 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10413 int rssi_min_thold, 10414 int rssi_max_thold) 10415 { 10416 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10417 10418 WARN_ON(rssi_min_thold == rssi_max_thold || 10419 rssi_min_thold > rssi_max_thold); 10420 10421 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10422 rssi_max_thold); 10423 } 10424 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10425 10426 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10427 { 10428 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10429 10430 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10431 } 10432 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10433 10434 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10435 struct ieee80211_mgmt *mgmt, size_t len) 10436 { 10437 struct ieee80211_local *local = sdata->local; 10438 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10439 struct ieee80211_mgd_assoc_data *add_links_data = 10440 ifmgd->reconf.add_links_data; 10441 struct sta_info *sta; 10442 struct cfg80211_mlo_reconf_done_data done_data = {}; 10443 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10444 sdata->u.mgd.reconf.removed_links; 10445 u16 link_mask, valid_links; 10446 unsigned int link_id; 10447 size_t orig_len = len; 10448 u8 i, group_key_data_len; 10449 u8 *pos; 10450 10451 if (!ieee80211_vif_is_mld(&sdata->vif) || 10452 len < IEEE80211_MIN_ACTION_SIZE(ml_reconf_resp) || 10453 mgmt->u.action.ml_reconf_resp.dialog_token != 10454 sdata->u.mgd.reconf.dialog_token || 10455 !sta_changed_links) 10456 return; 10457 10458 pos = mgmt->u.action.ml_reconf_resp.variable; 10459 len -= offsetofend(typeof(*mgmt), u.action.ml_reconf_resp); 10460 10461 /* each status duple is 3 octets */ 10462 if (len < mgmt->u.action.ml_reconf_resp.count * 3) { 10463 sdata_info(sdata, 10464 "mlo: reconf: unexpected len=%zu, count=%u\n", 10465 len, mgmt->u.action.ml_reconf_resp.count); 10466 goto disconnect; 10467 } 10468 10469 link_mask = sta_changed_links; 10470 for (i = 0; i < mgmt->u.action.ml_reconf_resp.count; i++) { 10471 u16 status = get_unaligned_le16(pos + 1); 10472 10473 link_id = *pos; 10474 10475 if (!(link_mask & BIT(link_id))) { 10476 sdata_info(sdata, 10477 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10478 link_id, sta_changed_links); 10479 goto disconnect; 10480 } 10481 10482 /* clear the corresponding link, to detect the case that 10483 * the same link was included more than one time 10484 */ 10485 link_mask &= ~BIT(link_id); 10486 10487 /* Handle failure to remove links here. Failure to remove added 10488 * links will be done later in the flow. 10489 */ 10490 if (status != WLAN_STATUS_SUCCESS) { 10491 sdata_info(sdata, 10492 "mlo: reconf: failed on link=%u, status=%u\n", 10493 link_id, status); 10494 10495 /* The AP MLD failed to remove a link that was already 10496 * removed locally. As this is not expected behavior, 10497 * disconnect 10498 */ 10499 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10500 goto disconnect; 10501 10502 /* The AP MLD failed to add a link. Remove it from the 10503 * added links. 10504 */ 10505 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10506 } 10507 10508 pos += 3; 10509 len -= 3; 10510 } 10511 10512 if (link_mask) { 10513 sdata_info(sdata, 10514 "mlo: reconf: no response for links=0x%x\n", 10515 link_mask); 10516 goto disconnect; 10517 } 10518 10519 if (!sdata->u.mgd.reconf.added_links) 10520 goto out; 10521 10522 if (len < 1 || len < 1 + *pos) { 10523 sdata_info(sdata, 10524 "mlo: reconf: invalid group key data length"); 10525 goto disconnect; 10526 } 10527 10528 /* The Group Key Data field must be present when links are added. This 10529 * field should be processed by userland. 10530 */ 10531 group_key_data_len = *pos++; 10532 10533 pos += group_key_data_len; 10534 len -= group_key_data_len + 1; 10535 10536 /* Process the information for the added links */ 10537 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10538 if (WARN_ON(!sta)) 10539 goto disconnect; 10540 10541 valid_links = sdata->vif.valid_links; 10542 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10543 if (!add_links_data->link[link_id].bss || 10544 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10545 continue; 10546 10547 valid_links |= BIT(link_id); 10548 if (ieee80211_sta_allocate_link(sta, link_id)) 10549 goto disconnect; 10550 } 10551 10552 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10553 link_mask = 0; 10554 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10555 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10556 struct ieee80211_link_data *link; 10557 struct link_sta_info *link_sta; 10558 u64 changed = 0; 10559 10560 if (!cbss) 10561 continue; 10562 10563 link = sdata_dereference(sdata->link[link_id], sdata); 10564 if (WARN_ON(!link)) 10565 goto disconnect; 10566 10567 link_info(link, 10568 "mlo: reconf: local address %pM, AP link address %pM\n", 10569 add_links_data->link[link_id].addr, 10570 add_links_data->link[link_id].bss->bssid); 10571 10572 link_sta = rcu_dereference_protected(sta->link[link_id], 10573 lockdep_is_held(&local->hw.wiphy->mtx)); 10574 if (WARN_ON(!link_sta)) 10575 goto disconnect; 10576 10577 if (!link->u.mgd.have_beacon) { 10578 const struct cfg80211_bss_ies *ies; 10579 10580 rcu_read_lock(); 10581 ies = rcu_dereference(cbss->beacon_ies); 10582 if (ies) 10583 link->u.mgd.have_beacon = true; 10584 else 10585 ies = rcu_dereference(cbss->ies); 10586 ieee80211_get_dtim(ies, 10587 &link->conf->sync_dtim_count, 10588 &link->u.mgd.dtim_period); 10589 link->conf->beacon_int = cbss->beacon_interval; 10590 rcu_read_unlock(); 10591 } 10592 10593 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10594 10595 link->u.mgd.conn = add_links_data->link[link_id].conn; 10596 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10597 true, &link->u.mgd.conn, 10598 sdata->u.mgd.userspace_selectors)) { 10599 link_info(link, "mlo: reconf: prep_channel failed\n"); 10600 goto disconnect; 10601 } 10602 10603 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10604 add_links_data->link[link_id].bss)) 10605 goto disconnect; 10606 10607 if (!ieee80211_assoc_config_link(link, link_sta, 10608 add_links_data->link[link_id].bss, 10609 mgmt, pos, len, 10610 &changed)) 10611 goto disconnect; 10612 10613 /* The AP MLD indicated success for this link, but the station 10614 * profile status indicated otherwise. Since there is an 10615 * inconsistency in the ML reconfiguration response, disconnect 10616 */ 10617 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10618 goto disconnect; 10619 10620 ieee80211_sta_init_nss(link_sta); 10621 if (ieee80211_sta_activate_link(sta, link_id)) 10622 goto disconnect; 10623 10624 changed |= ieee80211_link_set_associated(link, cbss); 10625 ieee80211_link_info_change_notify(sdata, link, changed); 10626 10627 ieee80211_recalc_smps(sdata, link); 10628 link_mask |= BIT(link_id); 10629 } 10630 10631 sdata_info(sdata, 10632 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10633 valid_links, link_mask); 10634 10635 /* links might have changed due to rejected ones, set them again */ 10636 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10637 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10638 10639 ieee80211_recalc_ps(local); 10640 ieee80211_recalc_ps_vif(sdata); 10641 10642 done_data.buf = (const u8 *)mgmt; 10643 done_data.len = orig_len; 10644 done_data.added_links = link_mask; 10645 10646 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10647 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10648 done_data.links[link_id].addr = 10649 add_links_data->link[link_id].addr; 10650 } 10651 10652 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10653 kfree(sdata->u.mgd.reconf.add_links_data); 10654 sdata->u.mgd.reconf.add_links_data = NULL; 10655 out: 10656 ieee80211_ml_reconf_reset(sdata); 10657 return; 10658 10659 disconnect: 10660 __ieee80211_disconnect(sdata); 10661 } 10662 10663 static struct sk_buff * 10664 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10665 struct ieee80211_mgd_assoc_data *add_links_data, 10666 u16 removed_links, __le16 ext_mld_capa_ops) 10667 { 10668 struct ieee80211_local *local = sdata->local; 10669 struct ieee80211_mgmt *mgmt; 10670 struct ieee80211_multi_link_elem *ml_elem; 10671 struct ieee80211_mle_basic_common_info *common; 10672 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10673 struct sk_buff *skb; 10674 size_t size; 10675 unsigned int link_id; 10676 __le16 eml_capa = 0, mld_capa_ops = 0; 10677 struct ieee80211_tx_info *info; 10678 u8 common_size, var_common_size; 10679 u8 *ml_elem_len; 10680 u16 capab = 0; 10681 10682 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10683 10684 /* Consider the maximal length of the reconfiguration ML element */ 10685 size += sizeof(struct ieee80211_multi_link_elem); 10686 10687 /* The Basic ML element and the Reconfiguration ML element have the same 10688 * fixed common information fields in the context of ML reconfiguration 10689 * action frame. The AP MLD MAC address must always be present 10690 */ 10691 common_size = sizeof(*common); 10692 10693 /* when adding links, the MLD capabilities must be present */ 10694 var_common_size = 0; 10695 if (add_links_data) { 10696 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10697 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10698 ieee80211_vif_type_p2p(&sdata->vif)); 10699 10700 if (ift_ext_capa) { 10701 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10702 mld_capa_ops = 10703 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10704 } 10705 10706 /* MLD capabilities and operation */ 10707 var_common_size += 2; 10708 10709 /* EML capabilities */ 10710 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10711 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10712 var_common_size += 2; 10713 } 10714 10715 if (ext_mld_capa_ops) 10716 var_common_size += 2; 10717 10718 /* Add the common information length */ 10719 size += common_size + var_common_size; 10720 10721 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10722 struct cfg80211_bss *cbss; 10723 size_t elems_len; 10724 10725 if (removed_links & BIT(link_id)) { 10726 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10727 ETH_ALEN; 10728 continue; 10729 } 10730 10731 if (!add_links_data || !add_links_data->link[link_id].bss) 10732 continue; 10733 10734 elems_len = add_links_data->link[link_id].elems_len; 10735 cbss = add_links_data->link[link_id].bss; 10736 10737 /* should be the same across all BSSes */ 10738 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10739 capab |= WLAN_CAPABILITY_PRIVACY; 10740 10741 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10742 ETH_ALEN; 10743 10744 /* WMM */ 10745 size += 9; 10746 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10747 elems_len); 10748 } 10749 10750 skb = alloc_skb(size, GFP_KERNEL); 10751 if (!skb) 10752 return NULL; 10753 10754 skb_reserve(skb, local->hw.extra_tx_headroom); 10755 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ml_reconf_req)); 10756 10757 /* Add the MAC header */ 10758 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10759 IEEE80211_STYPE_ACTION); 10760 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10761 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10762 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10763 10764 /* Add the action frame fixed fields */ 10765 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10766 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10767 10768 /* allocate a dialog token and store it */ 10769 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10770 mgmt->u.action.ml_reconf_req.dialog_token = 10771 sdata->u.mgd.reconf.dialog_token; 10772 10773 /* Add the ML reconfiguration element and the common information */ 10774 skb_put_u8(skb, WLAN_EID_EXTENSION); 10775 ml_elem_len = skb_put(skb, 1); 10776 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10777 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10778 ml_elem->control = 10779 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10780 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10781 common = skb_put(skb, common_size); 10782 common->len = common_size + var_common_size; 10783 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10784 10785 if (add_links_data) { 10786 if (eml_capa & 10787 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10788 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10789 ml_elem->control |= 10790 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10791 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10792 } 10793 10794 ml_elem->control |= 10795 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10796 10797 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10798 } 10799 10800 if (ext_mld_capa_ops) { 10801 ml_elem->control |= 10802 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10803 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10804 } 10805 10806 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10807 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10808 10809 /* Add the per station profile */ 10810 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10811 u8 *subelem_len = NULL; 10812 u16 ctrl; 10813 const u8 *addr; 10814 10815 /* Skip links that are not changing */ 10816 if (!(removed_links & BIT(link_id)) && 10817 (!add_links_data || !add_links_data->link[link_id].bss)) 10818 continue; 10819 10820 ctrl = link_id | 10821 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10822 10823 if (removed_links & BIT(link_id)) { 10824 struct ieee80211_bss_conf *conf = 10825 sdata_dereference(sdata->vif.link_conf[link_id], 10826 sdata); 10827 if (!conf) 10828 continue; 10829 10830 addr = conf->addr; 10831 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10832 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10833 } else { 10834 addr = add_links_data->link[link_id].addr; 10835 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10836 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10837 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10838 } 10839 10840 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10841 subelem_len = skb_put(skb, 1); 10842 10843 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10844 skb_put_u8(skb, 1 + ETH_ALEN); 10845 skb_put_data(skb, addr, ETH_ALEN); 10846 10847 if (!(removed_links & BIT(link_id))) { 10848 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10849 size_t extra_used; 10850 void *capab_pos; 10851 u8 qos_info; 10852 10853 capab_pos = skb_put(skb, 2); 10854 10855 extra_used = 10856 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10857 add_links_data->link[link_id].elems, 10858 add_links_data->link[link_id].elems_len, 10859 link_id, NULL, 10860 link_present_elems, 10861 add_links_data); 10862 10863 if (add_links_data->link[link_id].elems) 10864 skb_put_data(skb, 10865 add_links_data->link[link_id].elems + 10866 extra_used, 10867 add_links_data->link[link_id].elems_len - 10868 extra_used); 10869 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10870 qos_info = sdata->u.mgd.uapsd_queues; 10871 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10873 } else { 10874 qos_info = 0; 10875 } 10876 10877 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10878 put_unaligned_le16(capab, capab_pos); 10879 } 10880 10881 ieee80211_fragment_element(skb, subelem_len, 10882 IEEE80211_MLE_SUBELEM_FRAGMENT); 10883 } 10884 10885 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10886 10887 info = IEEE80211_SKB_CB(skb); 10888 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10889 10890 return skb; 10891 } 10892 10893 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10894 struct cfg80211_ml_reconf_req *req) 10895 { 10896 struct ieee80211_local *local = sdata->local; 10897 struct ieee80211_mgd_assoc_data *data = NULL; 10898 struct sta_info *sta; 10899 struct sk_buff *skb; 10900 u16 added_links, new_valid_links; 10901 int link_id, err; 10902 10903 if (!ieee80211_vif_is_mld(&sdata->vif) || 10904 !(sdata->vif.cfg.mld_capa_op & 10905 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10906 return -EINVAL; 10907 10908 /* No support for concurrent ML reconfiguration operation */ 10909 if (sdata->u.mgd.reconf.added_links || 10910 sdata->u.mgd.reconf.removed_links) 10911 return -EBUSY; 10912 10913 added_links = 0; 10914 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10915 if (!req->add_links[link_id].bss) 10916 continue; 10917 10918 added_links |= BIT(link_id); 10919 } 10920 10921 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10922 if (WARN_ON(!sta)) 10923 return -ENOLINK; 10924 10925 /* Adding links to the set of valid link is done only after a successful 10926 * ML reconfiguration frame exchange. Here prepare the data for the ML 10927 * reconfiguration frame construction and allocate the required 10928 * resources 10929 */ 10930 if (added_links) { 10931 bool uapsd_supported; 10932 10933 data = kzalloc_obj(*data); 10934 if (!data) 10935 return -ENOMEM; 10936 10937 data->assoc_link_id = -1; 10938 data->wmm = true; 10939 10940 uapsd_supported = true; 10941 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10942 link_id++) { 10943 struct ieee80211_supported_band *sband; 10944 struct cfg80211_bss *link_cbss = 10945 req->add_links[link_id].bss; 10946 struct ieee80211_bss *bss; 10947 10948 if (!link_cbss) 10949 continue; 10950 10951 bss = (void *)link_cbss->priv; 10952 10953 if (!bss->wmm_used) { 10954 err = -EINVAL; 10955 goto err_free; 10956 } 10957 10958 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10959 err = -EINVAL; 10960 goto err_free; 10961 } 10962 10963 eth_random_addr(data->link[link_id].addr); 10964 data->link[link_id].conn = 10965 ieee80211_conn_settings_unlimited; 10966 sband = 10967 local->hw.wiphy->bands[link_cbss->channel->band]; 10968 10969 ieee80211_determine_our_sta_mode(sdata, sband, 10970 NULL, true, link_id, 10971 &data->link[link_id].conn); 10972 10973 data->link[link_id].bss = link_cbss; 10974 data->link[link_id].elems = 10975 (u8 *)req->add_links[link_id].elems; 10976 data->link[link_id].elems_len = 10977 req->add_links[link_id].elems_len; 10978 10979 if (!bss->uapsd_supported) 10980 uapsd_supported = false; 10981 10982 if (data->link[link_id].conn.mode < 10983 IEEE80211_CONN_MODE_EHT) { 10984 err = -EINVAL; 10985 goto err_free; 10986 } 10987 10988 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10989 link_id); 10990 if (err) { 10991 err = -EINVAL; 10992 goto err_free; 10993 } 10994 } 10995 10996 /* Require U-APSD support if we enabled it */ 10997 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10998 !uapsd_supported) { 10999 err = -EINVAL; 11000 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 11001 goto err_free; 11002 } 11003 11004 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11005 link_id++) { 11006 if (!data->link[link_id].bss) 11007 continue; 11008 11009 /* only used to verify the mode, nothing is allocated */ 11010 err = ieee80211_prep_channel(sdata, NULL, link_id, 11011 data->link[link_id].bss, 11012 true, 11013 &data->link[link_id].conn, 11014 sdata->u.mgd.userspace_selectors); 11015 if (err) 11016 goto err_free; 11017 } 11018 } 11019 11020 /* link removal is done before the ML reconfiguration frame exchange so 11021 * that these links will not be used between their removal by the AP MLD 11022 * and before the station got the ML reconfiguration response. Based on 11023 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 11024 * link removal request. 11025 */ 11026 if (req->rem_links) { 11027 u16 new_active_links = 11028 sdata->vif.active_links & ~req->rem_links; 11029 11030 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 11031 11032 /* Should not be left with no valid links to perform the 11033 * ML reconfiguration 11034 */ 11035 if (!new_valid_links || 11036 !(new_valid_links & ~sdata->vif.dormant_links)) { 11037 sdata_info(sdata, "mlo: reconf: no valid links\n"); 11038 err = -EINVAL; 11039 goto err_free; 11040 } 11041 11042 if (new_active_links != sdata->vif.active_links) { 11043 if (!new_active_links) 11044 new_active_links = 11045 BIT(__ffs(new_valid_links & 11046 ~sdata->vif.dormant_links)); 11047 11048 err = ieee80211_set_active_links(&sdata->vif, 11049 new_active_links); 11050 if (err) { 11051 sdata_info(sdata, 11052 "mlo: reconf: failed set active links\n"); 11053 goto err_free; 11054 } 11055 } 11056 } 11057 11058 /* Build the SKB before the link removal as the construction of the 11059 * station info for removed links requires the local address. 11060 * Invalidate the removed links, so that the transmission of the ML 11061 * reconfiguration request frame would not be done using them, as the AP 11062 * is expected to send the ML reconfiguration response frame on the link 11063 * on which the request was received. 11064 */ 11065 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 11066 cpu_to_le16(req->ext_mld_capa_ops)); 11067 if (!skb) { 11068 err = -ENOMEM; 11069 goto err_free; 11070 } 11071 11072 if (req->rem_links) { 11073 u16 new_dormant_links = 11074 sdata->vif.dormant_links & ~req->rem_links; 11075 11076 err = ieee80211_vif_set_links(sdata, new_valid_links, 11077 new_dormant_links); 11078 if (err) { 11079 sdata_info(sdata, 11080 "mlo: reconf: failed set valid links\n"); 11081 kfree_skb(skb); 11082 goto err_free; 11083 } 11084 11085 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11086 link_id++) { 11087 if (!(req->rem_links & BIT(link_id))) 11088 continue; 11089 11090 ieee80211_sta_remove_link(sta, link_id); 11091 } 11092 11093 /* notify the driver and upper layers */ 11094 ieee80211_vif_cfg_change_notify(sdata, 11095 BSS_CHANGED_MLD_VALID_LINKS); 11096 cfg80211_links_removed(sdata->dev, req->rem_links); 11097 } 11098 11099 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 11100 added_links, req->rem_links); 11101 11102 ieee80211_tx_skb(sdata, skb); 11103 11104 sdata->u.mgd.reconf.added_links = added_links; 11105 sdata->u.mgd.reconf.add_links_data = data; 11106 sdata->u.mgd.reconf.removed_links = req->rem_links; 11107 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 11108 &sdata->u.mgd.reconf.wk, 11109 IEEE80211_ASSOC_TIMEOUT_SHORT); 11110 return 0; 11111 11112 err_free: 11113 kfree(data); 11114 return err; 11115 } 11116 11117 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 11118 { 11119 unsigned long valid_links = sdata->vif.valid_links; 11120 u8 link_id; 11121 11122 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11123 11124 if (!ieee80211_vif_is_mld(&sdata->vif)) 11125 return false; 11126 11127 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 11128 struct ieee80211_bss_conf *bss_conf = 11129 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 11130 11131 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 11132 return false; 11133 } 11134 11135 return true; 11136 } 11137 11138 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 11139 { 11140 int frame_len = IEEE80211_MIN_ACTION_SIZE(epcs) + (enable ? 1 : 0); 11141 struct ieee80211_local *local = sdata->local; 11142 struct ieee80211_mgmt *mgmt; 11143 struct sk_buff *skb; 11144 11145 if (!ieee80211_mgd_epcs_supp(sdata)) 11146 return -EINVAL; 11147 11148 if (sdata->u.mgd.epcs.enabled == enable && 11149 !sdata->u.mgd.epcs.dialog_token) 11150 return 0; 11151 11152 /* Do not allow enabling EPCS if the AP didn't respond yet. 11153 * However, allow disabling EPCS in such a case. 11154 */ 11155 if (sdata->u.mgd.epcs.dialog_token && enable) 11156 return -EALREADY; 11157 11158 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 11159 if (!skb) 11160 return -ENOBUFS; 11161 11162 skb_reserve(skb, local->hw.extra_tx_headroom); 11163 mgmt = skb_put_zero(skb, frame_len); 11164 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11165 IEEE80211_STYPE_ACTION); 11166 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11167 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11168 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11169 11170 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11171 if (enable) { 11172 u8 *pos = mgmt->u.action.epcs.variable; 11173 11174 mgmt->u.action.action_code = 11175 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 11176 11177 *pos = ++sdata->u.mgd.dialog_token_alloc; 11178 sdata->u.mgd.epcs.dialog_token = *pos; 11179 } else { 11180 mgmt->u.action.action_code = 11181 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 11182 11183 ieee80211_epcs_teardown(sdata); 11184 ieee80211_epcs_changed(sdata, false); 11185 } 11186 11187 ieee80211_tx_skb(sdata, skb); 11188 return 0; 11189 } 11190 11191 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 11192 struct ieee802_11_elems *elems) 11193 { 11194 const struct element *sub; 11195 size_t scratch_len = elems->ml_epcs_len; 11196 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 11197 11198 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11199 11200 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 11201 return; 11202 11203 if (WARN_ON(!scratch)) 11204 return; 11205 11206 /* Directly parse the sub elements as the common information doesn't 11207 * hold any useful information. 11208 */ 11209 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 11210 elems->ml_epcs_len) { 11211 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 11212 struct ieee80211_link_data *link; 11213 u8 *pos = (void *)sub->data; 11214 u16 control; 11215 ssize_t len; 11216 u8 link_id; 11217 11218 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11219 continue; 11220 11221 if (sub->datalen < sizeof(control)) 11222 break; 11223 11224 control = get_unaligned_le16(pos); 11225 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11226 11227 link = sdata_dereference(sdata->link[link_id], sdata); 11228 if (!link) 11229 continue; 11230 11231 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11232 elems->ml_epcs_len, 11233 scratch, scratch_len, 11234 IEEE80211_MLE_SUBELEM_FRAGMENT); 11235 if (len < (ssize_t)sizeof(control)) 11236 continue; 11237 11238 pos = scratch + sizeof(control); 11239 len -= sizeof(control); 11240 11241 link_elems = ieee802_11_parse_elems(pos, len, 11242 IEEE80211_FTYPE_MGMT | 11243 IEEE80211_STYPE_ACTION, 11244 NULL); 11245 if (!link_elems) 11246 continue; 11247 11248 if (ieee80211_sta_wmm_params(sdata->local, link, 11249 link_elems->wmm_param, 11250 link_elems->wmm_param_len, 11251 link_elems->mu_edca_param_set)) 11252 ieee80211_link_info_change_notify(sdata, link, 11253 BSS_CHANGED_QOS); 11254 } 11255 } 11256 11257 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11258 struct ieee80211_mgmt *mgmt, size_t len) 11259 { 11260 struct ieee802_11_elems *elems __free(kfree) = NULL; 11261 size_t ies_len; 11262 u16 status_code; 11263 u8 *pos, dialog_token; 11264 11265 if (!ieee80211_mgd_epcs_supp(sdata)) 11266 return; 11267 11268 /* Handle dialog token and status code */ 11269 pos = mgmt->u.action.epcs.variable; 11270 dialog_token = *pos; 11271 status_code = get_unaligned_le16(pos + 1); 11272 11273 /* An EPCS enable response with dialog token == 0 is an unsolicited 11274 * notification from the AP MLD. In such a case, EPCS should already be 11275 * enabled and status must be success 11276 */ 11277 if (!dialog_token && 11278 (!sdata->u.mgd.epcs.enabled || 11279 status_code != WLAN_STATUS_SUCCESS)) 11280 return; 11281 11282 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11283 return; 11284 11285 sdata->u.mgd.epcs.dialog_token = 0; 11286 11287 if (status_code != WLAN_STATUS_SUCCESS) 11288 return; 11289 11290 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11291 ies_len = len - IEEE80211_MIN_ACTION_SIZE(epcs) - 11292 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11293 11294 elems = ieee802_11_parse_elems(pos, ies_len, 11295 IEEE80211_FTYPE_MGMT | 11296 IEEE80211_STYPE_ACTION, 11297 NULL); 11298 if (!elems) 11299 return; 11300 11301 ieee80211_ml_epcs(sdata, elems); 11302 ieee80211_epcs_changed(sdata, true); 11303 } 11304 11305 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11306 struct ieee80211_mgmt *mgmt, size_t len) 11307 { 11308 if (!ieee80211_vif_is_mld(&sdata->vif) || 11309 !sdata->u.mgd.epcs.enabled) 11310 return; 11311 11312 ieee80211_epcs_teardown(sdata); 11313 ieee80211_epcs_changed(sdata, false); 11314 } 11315